Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

[can-eth-gw-linux.git] / drivers / net / wireless / brcm80211 / brcmsmac / main.c

/*
 * Copyright (c) 2010 Broadcom Corporation
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/pci_ids.h>
#include <linux/if_ether.h>
#include <net/cfg80211.h>
#include <net/mac80211.h>
#include <brcm_hw_ids.h>
#include <aiutils.h>
#include <chipcommon.h>
#include "rate.h"
#include "scb.h"
#include "phy/phy_hal.h"
#include "channel.h"
#include "antsel.h"
#include "stf.h"
#include "ampdu.h"
#include "mac80211_if.h"
#include "ucode_loader.h"
#include "main.h"
#include "soc.h"
#include "dma.h"
#include "debug.h"
#include "brcms_trace_events.h"

/* watchdog timer, in unit of ms */
#define TIMER_INTERVAL_WATCHDOG         1000
/* radio monitor timer, in unit of ms */
#define TIMER_INTERVAL_RADIOCHK         800

/* beacon interval, in unit of 1024TU */
#define BEACON_INTERVAL_DEFAULT         100

/* n-mode support capability */
/* 2x2 includes both 1x1 & 2x2 devices
 * reserved #define 2 for future when we want to separate 1x1 & 2x2 and
 * control it independently
 */
#define WL_11N_2x2                      1
#define WL_11N_3x3                      3
#define WL_11N_4x4                      4

#define EDCF_ACI_MASK                   0x60
#define EDCF_ACI_SHIFT                  5
#define EDCF_ECWMIN_MASK                0x0f
#define EDCF_ECWMAX_SHIFT               4
#define EDCF_AIFSN_MASK                 0x0f
#define EDCF_AIFSN_MAX                  15
#define EDCF_ECWMAX_MASK                0xf0

#define EDCF_AC_BE_TXOP_STA             0x0000
#define EDCF_AC_BK_TXOP_STA             0x0000
#define EDCF_AC_VO_ACI_STA              0x62
#define EDCF_AC_VO_ECW_STA              0x32
#define EDCF_AC_VI_ACI_STA              0x42
#define EDCF_AC_VI_ECW_STA              0x43
#define EDCF_AC_BK_ECW_STA              0xA4
#define EDCF_AC_VI_TXOP_STA             0x005e
#define EDCF_AC_VO_TXOP_STA             0x002f
#define EDCF_AC_BE_ACI_STA              0x03
#define EDCF_AC_BE_ECW_STA              0xA4
#define EDCF_AC_BK_ACI_STA              0x27
#define EDCF_AC_VO_TXOP_AP              0x002f

#define EDCF_TXOP2USEC(txop)            ((txop) << 5)
#define EDCF_ECW2CW(exp)                ((1 << (exp)) - 1)

#define APHY_SYMBOL_TIME                4
#define APHY_PREAMBLE_TIME              16
#define APHY_SIGNAL_TIME                4
#define APHY_SIFS_TIME                  16
#define APHY_SERVICE_NBITS              16
#define APHY_TAIL_NBITS                 6
#define BPHY_SIFS_TIME                  10
#define BPHY_PLCP_SHORT_TIME            96

#define PREN_PREAMBLE                   24
#define PREN_MM_EXT                     12
#define PREN_PREAMBLE_EXT               4

#define DOT11_MAC_HDR_LEN               24
#define DOT11_ACK_LEN                   10
#define DOT11_BA_LEN                    4
#define DOT11_OFDM_SIGNAL_EXTENSION     6
#define DOT11_MIN_FRAG_LEN              256
#define DOT11_RTS_LEN                   16
#define DOT11_CTS_LEN                   10
#define DOT11_BA_BITMAP_LEN             128
#define DOT11_MIN_BEACON_PERIOD         1
#define DOT11_MAX_BEACON_PERIOD         0xFFFF
#define DOT11_MAXNUMFRAGS               16
#define DOT11_MAX_FRAG_LEN              2346

#define BPHY_PLCP_TIME                  192
#define RIFS_11N_TIME                   2

/* length of the BCN template area */
#define BCN_TMPL_LEN                    512

/* brcms_bss_info flag bit values */
#define BRCMS_BSS_HT                    0x0020  /* BSS is HT (MIMO) capable */

/* chip rx buffer offset */
#define BRCMS_HWRXOFF                   38

/* rfdisable delay timer 500 ms, runs of ALP clock */
#define RFDISABLE_DEFAULT               10000000

#define BRCMS_TEMPSENSE_PERIOD          10      /* 10 second timeout */

/* synthpu_dly times in us */
#define SYNTHPU_DLY_APHY_US             3700
#define SYNTHPU_DLY_BPHY_US             1050
#define SYNTHPU_DLY_NPHY_US             2048
#define SYNTHPU_DLY_LPPHY_US            300

#define ANTCNT                          10      /* vanilla M_MAX_ANTCNT val */

/* Per-AC retry limit register definitions; uses defs.h bitfield macros */
#define EDCF_SHORT_S                    0
#define EDCF_SFB_S                      4
#define EDCF_LONG_S                     8
#define EDCF_LFB_S                      12
#define EDCF_SHORT_M                    BITFIELD_MASK(4)
#define EDCF_SFB_M                      BITFIELD_MASK(4)
#define EDCF_LONG_M                     BITFIELD_MASK(4)
#define EDCF_LFB_M                      BITFIELD_MASK(4)

#define RETRY_SHORT_DEF                 7       /* Default Short retry Limit */
#define RETRY_SHORT_MAX                 255     /* Maximum Short retry Limit */
#define RETRY_LONG_DEF                  4       /* Default Long retry count */
#define RETRY_SHORT_FB                  3       /* Short count for fb rate */
#define RETRY_LONG_FB                   2       /* Long count for fb rate */

#define APHY_CWMIN                      15
#define PHY_CWMAX                       1023

#define EDCF_AIFSN_MIN                  1

#define FRAGNUM_MASK                    0xF

#define APHY_SLOT_TIME                  9
#define BPHY_SLOT_TIME                  20

#define WL_SPURAVOID_OFF                0
#define WL_SPURAVOID_ON1                1
#define WL_SPURAVOID_ON2                2

/* invalid core flags, use the saved coreflags */
#define BRCMS_USE_COREFLAGS             0xffffffff

/* values for PLCPHdr_override */
#define BRCMS_PLCP_AUTO                 -1
#define BRCMS_PLCP_SHORT                0
#define BRCMS_PLCP_LONG                 1

/* values for g_protection_override and n_protection_override */
#define BRCMS_PROTECTION_AUTO           -1
#define BRCMS_PROTECTION_OFF            0
#define BRCMS_PROTECTION_ON             1
#define BRCMS_PROTECTION_MMHDR_ONLY     2
#define BRCMS_PROTECTION_CTS_ONLY       3

/* values for g_protection_control and n_protection_control */
#define BRCMS_PROTECTION_CTL_OFF        0
#define BRCMS_PROTECTION_CTL_LOCAL      1
#define BRCMS_PROTECTION_CTL_OVERLAP    2

/* values for n_protection */
#define BRCMS_N_PROTECTION_OFF          0
#define BRCMS_N_PROTECTION_OPTIONAL     1
#define BRCMS_N_PROTECTION_20IN40       2
#define BRCMS_N_PROTECTION_MIXEDMODE    3

/* values for band specific 40MHz capabilities */
#define BRCMS_N_BW_20ALL                0
#define BRCMS_N_BW_40ALL                1
#define BRCMS_N_BW_20IN2G_40IN5G        2

/* bitflags for SGI support (sgi_rx iovar) */
#define BRCMS_N_SGI_20                  0x01
#define BRCMS_N_SGI_40                  0x02

/* defines used by the nrate iovar */
/* MSC in use,indicates b0-6 holds an mcs */
#define NRATE_MCS_INUSE                 0x00000080
/* rate/mcs value */
#define NRATE_RATE_MASK                 0x0000007f
/* stf mode mask: siso, cdd, stbc, sdm */
#define NRATE_STF_MASK                  0x0000ff00
/* stf mode shift */
#define NRATE_STF_SHIFT                 8
/* bit indicate to override mcs only */
#define NRATE_OVERRIDE_MCS_ONLY         0x40000000
#define NRATE_SGI_MASK                  0x00800000      /* sgi mode */
#define NRATE_SGI_SHIFT                 23              /* sgi mode */
#define NRATE_LDPC_CODING               0x00400000      /* adv coding in use */
#define NRATE_LDPC_SHIFT                22              /* ldpc shift */

#define NRATE_STF_SISO                  0               /* stf mode SISO */
#define NRATE_STF_CDD                   1               /* stf mode CDD */
#define NRATE_STF_STBC                  2               /* stf mode STBC */
#define NRATE_STF_SDM                   3               /* stf mode SDM */

#define MAX_DMA_SEGS                    4

/* # of entries in Tx FIFO */
#define NTXD                            64
/* Max # of entries in Rx FIFO based on 4kb page size */
#define NRXD                            256

/* Amount of headroom to leave in Tx FIFO */
#define TX_HEADROOM                     4

/* try to keep this # rbufs posted to the chip */
#define NRXBUFPOST                      32

/* max # frames to process in brcms_c_recv() */
#define RXBND                           8
/* max # tx status to process in wlc_txstatus() */
#define TXSBND                          8

/* brcmu_format_flags() bit description structure */
struct brcms_c_bit_desc {
        u32 bit;
        const char *name;
};

/*
 * The following table lists the buffer memory allocated to xmt fifos in HW.
 * the size is in units of 256bytes(one block), total size is HW dependent
 * ucode has default fifo partition, sw can overwrite if necessary
 *
 * This is documented in twiki under the topic UcodeTxFifo. Please ensure
 * the twiki is updated before making changes.
 */

/* Starting corerev for the fifo size table */
#define XMTFIFOTBL_STARTREV     17

struct d11init {
        __le16 addr;
        __le16 size;
        __le32 value;
};

struct edcf_acparam {
        u8 ACI;
        u8 ECW;
        u16 TXOP;
} __packed;

/* debug/trace */
uint brcm_msg_level;

/* TX FIFO number to WME/802.1E Access Category */
static const u8 wme_fifo2ac[] = {
        IEEE80211_AC_BK,
        IEEE80211_AC_BE,
        IEEE80211_AC_VI,
        IEEE80211_AC_VO,
        IEEE80211_AC_BE,
        IEEE80211_AC_BE
};

/* ieee80211 Access Category to TX FIFO number */
static const u8 wme_ac2fifo[] = {
        TX_AC_VO_FIFO,
        TX_AC_VI_FIFO,
        TX_AC_BE_FIFO,
        TX_AC_BK_FIFO
};

static const u16 xmtfifo_sz[][NFIFO] = {
        /* corerev 17: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 18: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 19: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 20: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 21: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
        /* corerev 22: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 23: 5120, 49152, 49152, 5376, 4352, 1280 */
        {20, 192, 192, 21, 17, 5},
        /* corerev 24: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
        /* corerev 25: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 26: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 27: */
        {0, 0, 0, 0, 0, 0},
        /* corerev 28: 2304, 14848, 5632, 3584, 3584, 1280 */
        {9, 58, 22, 14, 14, 5},
};

#ifdef DEBUG
static const char * const fifo_names[] = {
        "AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" };
#else
static const char fifo_names[6][0];
#endif

#ifdef DEBUG
/* pointer to most recently allocated wl/wlc */
static struct brcms_c_info *wlc_info_dbg = (struct brcms_c_info *) (NULL);
#endif

/* Mapping of ieee80211 AC numbers to tx fifos */
static const u8 ac_to_fifo_mapping[IEEE80211_NUM_ACS] = {
        [IEEE80211_AC_VO]       = TX_AC_VO_FIFO,
        [IEEE80211_AC_VI]       = TX_AC_VI_FIFO,
        [IEEE80211_AC_BE]       = TX_AC_BE_FIFO,
        [IEEE80211_AC_BK]       = TX_AC_BK_FIFO,
};

/* Mapping of tx fifos to ieee80211 AC numbers */
static const u8 fifo_to_ac_mapping[IEEE80211_NUM_ACS] = {
        [TX_AC_BK_FIFO] = IEEE80211_AC_BK,
        [TX_AC_BE_FIFO] = IEEE80211_AC_BE,
        [TX_AC_VI_FIFO] = IEEE80211_AC_VI,
        [TX_AC_VO_FIFO] = IEEE80211_AC_VO,
};

static u8 brcms_ac_to_fifo(u8 ac)
{
        if (ac >= ARRAY_SIZE(ac_to_fifo_mapping))
                return TX_AC_BE_FIFO;
        return ac_to_fifo_mapping[ac];
}

static u8 brcms_fifo_to_ac(u8 fifo)
{
        if (fifo >= ARRAY_SIZE(fifo_to_ac_mapping))
                return IEEE80211_AC_BE;
        return fifo_to_ac_mapping[fifo];
}

/* Find basic rate for a given rate */
static u8 brcms_basic_rate(struct brcms_c_info *wlc, u32 rspec)
{
        if (is_mcs_rate(rspec))
                return wlc->band->basic_rate[mcs_table[rspec & RSPEC_RATE_MASK]
                       .leg_ofdm];
        return wlc->band->basic_rate[rspec & RSPEC_RATE_MASK];
}

static u16 frametype(u32 rspec, u8 mimoframe)
{
        if (is_mcs_rate(rspec))
                return mimoframe;
        return is_cck_rate(rspec) ? FT_CCK : FT_OFDM;
}

/* currently the best mechanism for determining SIFS is the band in use */
static u16 get_sifs(struct brcms_band *band)
{
        return band->bandtype == BRCM_BAND_5G ? APHY_SIFS_TIME :
                                 BPHY_SIFS_TIME;
}

/*
 * Detect Card removed.
 * Even checking an sbconfig register read will not false trigger when the core
 * is in reset it breaks CF address mechanism. Accessing gphy phyversion will
 * cause SB error if aphy is in reset on 4306B0-DB. Need a simple accessible
 * reg with fixed 0/1 pattern (some platforms return all 0).
 * If clocks are present, call the sb routine which will figure out if the
 * device is removed.
 */
static bool brcms_deviceremoved(struct brcms_c_info *wlc)
{
        u32 macctrl;

        if (!wlc->hw->clk)
                return ai_deviceremoved(wlc->hw->sih);
        macctrl = bcma_read32(wlc->hw->d11core,
                              D11REGOFFS(maccontrol));
        return (macctrl & (MCTL_PSM_JMP_0 | MCTL_IHR_EN)) != MCTL_IHR_EN;
}

/* sum the individual fifo tx pending packet counts */
static int brcms_txpktpendtot(struct brcms_c_info *wlc)
{
        int i;
        int pending = 0;

        for (i = 0; i < ARRAY_SIZE(wlc->hw->di); i++)
                if (wlc->hw->di[i])
                        pending += dma_txpending(wlc->hw->di[i]);
        return pending;
}

static bool brcms_is_mband_unlocked(struct brcms_c_info *wlc)
{
        return wlc->pub->_nbands > 1 && !wlc->bandlocked;
}

static int brcms_chspec_bw(u16 chanspec)
{
        if (CHSPEC_IS40(chanspec))
                return BRCMS_40_MHZ;
        if (CHSPEC_IS20(chanspec))
                return BRCMS_20_MHZ;

        return BRCMS_10_MHZ;
}

static void brcms_c_bsscfg_mfree(struct brcms_bss_cfg *cfg)
{
        if (cfg == NULL)
                return;

        kfree(cfg->current_bss);
        kfree(cfg);
}

static void brcms_c_detach_mfree(struct brcms_c_info *wlc)
{
        if (wlc == NULL)
                return;

        brcms_c_bsscfg_mfree(wlc->bsscfg);
        kfree(wlc->pub);
        kfree(wlc->modulecb);
        kfree(wlc->default_bss);
        kfree(wlc->protection);
        kfree(wlc->stf);
        kfree(wlc->bandstate[0]);
        kfree(wlc->corestate->macstat_snapshot);
        kfree(wlc->corestate);
        kfree(wlc->hw->bandstate[0]);
        kfree(wlc->hw);

        /* free the wlc */
        kfree(wlc);
        wlc = NULL;
}

static struct brcms_bss_cfg *brcms_c_bsscfg_malloc(uint unit)
{
        struct brcms_bss_cfg *cfg;

        cfg = kzalloc(sizeof(struct brcms_bss_cfg), GFP_ATOMIC);
        if (cfg == NULL)
                goto fail;

        cfg->current_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC);
        if (cfg->current_bss == NULL)
                goto fail;

        return cfg;

 fail:
        brcms_c_bsscfg_mfree(cfg);
        return NULL;
}

static struct brcms_c_info *
brcms_c_attach_malloc(uint unit, uint *err, uint devid)
{
        struct brcms_c_info *wlc;

        wlc = kzalloc(sizeof(struct brcms_c_info), GFP_ATOMIC);
        if (wlc == NULL) {
                *err = 1002;
                goto fail;
        }

        /* allocate struct brcms_c_pub state structure */
        wlc->pub = kzalloc(sizeof(struct brcms_pub), GFP_ATOMIC);
        if (wlc->pub == NULL) {
                *err = 1003;
                goto fail;
        }
        wlc->pub->wlc = wlc;

        /* allocate struct brcms_hardware state structure */

        wlc->hw = kzalloc(sizeof(struct brcms_hardware), GFP_ATOMIC);
        if (wlc->hw == NULL) {
                *err = 1005;
                goto fail;
        }
        wlc->hw->wlc = wlc;

        wlc->hw->bandstate[0] =
                kzalloc(sizeof(struct brcms_hw_band) * MAXBANDS, GFP_ATOMIC);
        if (wlc->hw->bandstate[0] == NULL) {
                *err = 1006;
                goto fail;
        } else {
                int i;

                for (i = 1; i < MAXBANDS; i++)
                        wlc->hw->bandstate[i] = (struct brcms_hw_band *)
                            ((unsigned long)wlc->hw->bandstate[0] +
                             (sizeof(struct brcms_hw_band) * i));
        }

        wlc->modulecb =
                kzalloc(sizeof(struct modulecb) * BRCMS_MAXMODULES, GFP_ATOMIC);
        if (wlc->modulecb == NULL) {
                *err = 1009;
                goto fail;
        }

        wlc->default_bss = kzalloc(sizeof(struct brcms_bss_info), GFP_ATOMIC);
        if (wlc->default_bss == NULL) {
                *err = 1010;
                goto fail;
        }

        wlc->bsscfg = brcms_c_bsscfg_malloc(unit);
        if (wlc->bsscfg == NULL) {
                *err = 1011;
                goto fail;
        }

        wlc->protection = kzalloc(sizeof(struct brcms_protection),
                                  GFP_ATOMIC);
        if (wlc->protection == NULL) {
                *err = 1016;
                goto fail;
        }

        wlc->stf = kzalloc(sizeof(struct brcms_stf), GFP_ATOMIC);
        if (wlc->stf == NULL) {
                *err = 1017;
                goto fail;
        }

        wlc->bandstate[0] =
                kzalloc(sizeof(struct brcms_band)*MAXBANDS, GFP_ATOMIC);
        if (wlc->bandstate[0] == NULL) {
                *err = 1025;
                goto fail;
        } else {
                int i;

                for (i = 1; i < MAXBANDS; i++)
                        wlc->bandstate[i] = (struct brcms_band *)
                                ((unsigned long)wlc->bandstate[0]
                                + (sizeof(struct brcms_band)*i));
        }

        wlc->corestate = kzalloc(sizeof(struct brcms_core), GFP_ATOMIC);
        if (wlc->corestate == NULL) {
                *err = 1026;
                goto fail;
        }

        wlc->corestate->macstat_snapshot =
                kzalloc(sizeof(struct macstat), GFP_ATOMIC);
        if (wlc->corestate->macstat_snapshot == NULL) {
                *err = 1027;
                goto fail;
        }

        return wlc;

 fail:
        brcms_c_detach_mfree(wlc);
        return NULL;
}

/*
 * Update the slot timing for standard 11b/g (20us slots)
 * or shortslot 11g (9us slots)
 * The PSM needs to be suspended for this call.
 */
static void brcms_b_update_slot_timing(struct brcms_hardware *wlc_hw,
                                        bool shortslot)
{
        struct bcma_device *core = wlc_hw->d11core;

        if (shortslot) {
                /* 11g short slot: 11a timing */
                bcma_write16(core, D11REGOFFS(ifs_slot), 0x0207);
                brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, APHY_SLOT_TIME);
        } else {
                /* 11g long slot: 11b timing */
                bcma_write16(core, D11REGOFFS(ifs_slot), 0x0212);
                brcms_b_write_shm(wlc_hw, M_DOT11_SLOT, BPHY_SLOT_TIME);
        }
}

/*
 * calculate frame duration of a given rate and length, return
 * time in usec unit
 */
static uint brcms_c_calc_frame_time(struct brcms_c_info *wlc, u32 ratespec,
                                    u8 preamble_type, uint mac_len)
{
        uint nsyms, dur = 0, Ndps, kNdps;
        uint rate = rspec2rate(ratespec);

        if (rate == 0) {
                brcms_err(wlc->hw->d11core, "wl%d: WAR: using rate of 1 mbps\n",
                          wlc->pub->unit);
                rate = BRCM_RATE_1M;
        }

        if (is_mcs_rate(ratespec)) {
                uint mcs = ratespec & RSPEC_RATE_MASK;
                int tot_streams = mcs_2_txstreams(mcs) + rspec_stc(ratespec);

                dur = PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT);
                if (preamble_type == BRCMS_MM_PREAMBLE)
                        dur += PREN_MM_EXT;
                /* 1000Ndbps = kbps * 4 */
                kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec),
                                   rspec_issgi(ratespec)) * 4;

                if (rspec_stc(ratespec) == 0)
                        nsyms =
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, kNdps);
                else
                        /* STBC needs to have even number of symbols */
                        nsyms =
                            2 *
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, 2 * kNdps);

                dur += APHY_SYMBOL_TIME * nsyms;
                if (wlc->band->bandtype == BRCM_BAND_2G)
                        dur += DOT11_OFDM_SIGNAL_EXTENSION;
        } else if (is_ofdm_rate(rate)) {
                dur = APHY_PREAMBLE_TIME;
                dur += APHY_SIGNAL_TIME;
                /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */
                Ndps = rate * 2;
                /* NSyms = CEILING((SERVICE + 8*NBytes + TAIL) / Ndbps) */
                nsyms =
                    CEIL((APHY_SERVICE_NBITS + 8 * mac_len + APHY_TAIL_NBITS),
                         Ndps);
                dur += APHY_SYMBOL_TIME * nsyms;
                if (wlc->band->bandtype == BRCM_BAND_2G)
                        dur += DOT11_OFDM_SIGNAL_EXTENSION;
        } else {
                /*
                 * calc # bits * 2 so factor of 2 in rate (1/2 mbps)
                 * will divide out
                 */
                mac_len = mac_len * 8 * 2;
                /* calc ceiling of bits/rate = microseconds of air time */
                dur = (mac_len + rate - 1) / rate;
                if (preamble_type & BRCMS_SHORT_PREAMBLE)
                        dur += BPHY_PLCP_SHORT_TIME;
                else
                        dur += BPHY_PLCP_TIME;
        }
        return dur;
}

static void brcms_c_write_inits(struct brcms_hardware *wlc_hw,
                                const struct d11init *inits)
{
        struct bcma_device *core = wlc_hw->d11core;
        int i;
        uint offset;
        u16 size;
        u32 value;

        brcms_dbg_info(wlc_hw->d11core, "wl%d\n", wlc_hw->unit);

        for (i = 0; inits[i].addr != cpu_to_le16(0xffff); i++) {
                size = le16_to_cpu(inits[i].size);
                offset = le16_to_cpu(inits[i].addr);
                value = le32_to_cpu(inits[i].value);
                if (size == 2)
                        bcma_write16(core, offset, value);
                else if (size == 4)
                        bcma_write32(core, offset, value);
                else
                        break;
        }
}

static void brcms_c_write_mhf(struct brcms_hardware *wlc_hw, u16 *mhfs)
{
        u8 idx;
        u16 addr[] = {
                M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
                M_HOST_FLAGS5
        };

        for (idx = 0; idx < MHFMAX; idx++)
                brcms_b_write_shm(wlc_hw, addr[idx], mhfs[idx]);
}

static void brcms_c_ucode_bsinit(struct brcms_hardware *wlc_hw)
{
        struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode;

        /* init microcode host flags */
        brcms_c_write_mhf(wlc_hw, wlc_hw->band->mhfs);

        /* do band-specific ucode IHR, SHM, and SCR inits */
        if (D11REV_IS(wlc_hw->corerev, 17) || D11REV_IS(wlc_hw->corerev, 23)) {
                if (BRCMS_ISNPHY(wlc_hw->band))
                        brcms_c_write_inits(wlc_hw, ucode->d11n0bsinitvals16);
                else
                        brcms_err(wlc_hw->d11core,
                                  "%s: wl%d: unsupported phy in corerev %d\n",
                                  __func__, wlc_hw->unit,
                                  wlc_hw->corerev);
        } else {
                if (D11REV_IS(wlc_hw->corerev, 24)) {
                        if (BRCMS_ISLCNPHY(wlc_hw->band))
                                brcms_c_write_inits(wlc_hw,
                                                    ucode->d11lcn0bsinitvals24);
                        else
                                brcms_err(wlc_hw->d11core,
                                          "%s: wl%d: unsupported phy in core rev %d\n",
                                          __func__, wlc_hw->unit,
                                          wlc_hw->corerev);
                } else {
                        brcms_err(wlc_hw->d11core,
                                  "%s: wl%d: unsupported corerev %d\n",
                                  __func__, wlc_hw->unit, wlc_hw->corerev);
                }
        }
}

static void brcms_b_core_ioctl(struct brcms_hardware *wlc_hw, u32 m, u32 v)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 ioctl = bcma_aread32(core, BCMA_IOCTL) & ~m;

        bcma_awrite32(core, BCMA_IOCTL, ioctl | v);
}

static void brcms_b_core_phy_clk(struct brcms_hardware *wlc_hw, bool clk)
{
        brcms_dbg_info(wlc_hw->d11core, "wl%d: clk %d\n", wlc_hw->unit, clk);

        wlc_hw->phyclk = clk;

        if (OFF == clk) {       /* clear gmode bit, put phy into reset */

                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC | SICF_GMODE),
                                   (SICF_PRST | SICF_FGC));
                udelay(1);
                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC), SICF_PRST);
                udelay(1);

        } else {                /* take phy out of reset */

                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_FGC), SICF_FGC);
                udelay(1);
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, 0);
                udelay(1);

        }
}

/* low-level band switch utility routine */
static void brcms_c_setxband(struct brcms_hardware *wlc_hw, uint bandunit)
{
        brcms_dbg_mac80211(wlc_hw->d11core, "wl%d: bandunit %d\n", wlc_hw->unit,
                           bandunit);

        wlc_hw->band = wlc_hw->bandstate[bandunit];

        /*
         * BMAC_NOTE:
         *   until we eliminate need for wlc->band refs in low level code
         */
        wlc_hw->wlc->band = wlc_hw->wlc->bandstate[bandunit];

        /* set gmode core flag */
        if (wlc_hw->sbclk && !wlc_hw->noreset) {
                u32 gmode = 0;

                if (bandunit == 0)
                        gmode = SICF_GMODE;

                brcms_b_core_ioctl(wlc_hw, SICF_GMODE, gmode);
        }
}

/* switch to new band but leave it inactive */
static u32 brcms_c_setband_inact(struct brcms_c_info *wlc, uint bandunit)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintmask;
        u32 macctrl;

        brcms_dbg_mac80211(wlc_hw->d11core, "wl%d\n", wlc_hw->unit);
        macctrl = bcma_read32(wlc_hw->d11core,
                              D11REGOFFS(maccontrol));
        WARN_ON((macctrl & MCTL_EN_MAC) != 0);

        /* disable interrupts */
        macintmask = brcms_intrsoff(wlc->wl);

        /* radio off */
        wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

        brcms_b_core_phy_clk(wlc_hw, OFF);

        brcms_c_setxband(wlc_hw, bandunit);

        return macintmask;
}

/* process an individual struct tx_status */
static bool
brcms_c_dotxstatus(struct brcms_c_info *wlc, struct tx_status *txs)
{
        struct sk_buff *p = NULL;
        uint queue = NFIFO;
        struct dma_pub *dma = NULL;
        struct d11txh *txh = NULL;
        struct scb *scb = NULL;
        bool free_pdu;
        int tx_rts, tx_frame_count, tx_rts_count;
        uint totlen, supr_status;
        bool lastframe;
        struct ieee80211_hdr *h;
        u16 mcl;
        struct ieee80211_tx_info *tx_info;
        struct ieee80211_tx_rate *txrate;
        int i;
        bool fatal = true;

        trace_brcms_txstatus(&wlc->hw->d11core->dev, txs->framelen,
                             txs->frameid, txs->status, txs->lasttxtime,
                             txs->sequence, txs->phyerr, txs->ackphyrxsh);

        /* discard intermediate indications for ucode with one legitimate case:
         *   e.g. if "useRTS" is set. ucode did a successful rts/cts exchange,
         *   but the subsequent tx of DATA failed. so it will start rts/cts
         *   from the beginning (resetting the rts transmission count)
         */
        if (!(txs->status & TX_STATUS_AMPDU)
            && (txs->status & TX_STATUS_INTERMEDIATE)) {
                brcms_dbg_tx(wlc->hw->d11core, "INTERMEDIATE but not AMPDU\n");
                fatal = false;
                goto out;
        }

        queue = txs->frameid & TXFID_QUEUE_MASK;
        if (queue >= NFIFO) {
                brcms_err(wlc->hw->d11core, "queue %u >= NFIFO\n", queue);
                goto out;
        }

        dma = wlc->hw->di[queue];

        p = dma_getnexttxp(wlc->hw->di[queue], DMA_RANGE_TRANSMITTED);
        if (p == NULL) {
                brcms_err(wlc->hw->d11core, "dma_getnexttxp returned null!\n");
                goto out;
        }

        txh = (struct d11txh *) (p->data);
        mcl = le16_to_cpu(txh->MacTxControlLow);

        if (txs->phyerr)
                brcms_err(wlc->hw->d11core, "phyerr 0x%x, rate 0x%x\n",
                          txs->phyerr, txh->MainRates);

        if (txs->frameid != le16_to_cpu(txh->TxFrameID)) {
                brcms_err(wlc->hw->d11core, "frameid != txh->TxFrameID\n");
                goto out;
        }
        tx_info = IEEE80211_SKB_CB(p);
        h = (struct ieee80211_hdr *)((u8 *) (txh + 1) + D11_PHY_HDR_LEN);

        if (tx_info->rate_driver_data[0])
                scb = &wlc->pri_scb;

        if (tx_info->flags & IEEE80211_TX_CTL_AMPDU) {
                brcms_c_ampdu_dotxstatus(wlc->ampdu, scb, p, txs);
                fatal = false;
                goto out;
        }

        /*
         * brcms_c_ampdu_dotxstatus() will trace tx descriptors for AMPDU
         * frames; this traces them for the rest.
         */
        trace_brcms_txdesc(&wlc->hw->d11core->dev, txh, sizeof(*txh));

        supr_status = txs->status & TX_STATUS_SUPR_MASK;
        if (supr_status == TX_STATUS_SUPR_BADCH) {
                unsigned xfts = le16_to_cpu(txh->XtraFrameTypes);
                brcms_dbg_tx(wlc->hw->d11core,
                             "Pkt tx suppressed, dest chan %u, current %d\n",
                             (xfts >> XFTS_CHANNEL_SHIFT) & 0xff,
                             CHSPEC_CHANNEL(wlc->default_bss->chanspec));
        }

        tx_rts = le16_to_cpu(txh->MacTxControlLow) & TXC_SENDRTS;
        tx_frame_count =
            (txs->status & TX_STATUS_FRM_RTX_MASK) >> TX_STATUS_FRM_RTX_SHIFT;
        tx_rts_count =
            (txs->status & TX_STATUS_RTS_RTX_MASK) >> TX_STATUS_RTS_RTX_SHIFT;

        lastframe = !ieee80211_has_morefrags(h->frame_control);

        if (!lastframe) {
                brcms_err(wlc->hw->d11core, "Not last frame!\n");
        } else {
                /*
                 * Set information to be consumed by Minstrel ht.
                 *
                 * The "fallback limit" is the number of tx attempts a given
                 * MPDU is sent at the "primary" rate. Tx attempts beyond that
                 * limit are sent at the "secondary" rate.
                 * A 'short frame' does not exceed RTS treshold.
                 */
                u16 sfbl,       /* Short Frame Rate Fallback Limit */
                    lfbl,       /* Long Frame Rate Fallback Limit */
                    fbl;

                if (queue < IEEE80211_NUM_ACS) {
                        sfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]],
                                      EDCF_SFB);
                        lfbl = GFIELD(wlc->wme_retries[wme_fifo2ac[queue]],
                                      EDCF_LFB);
                } else {
                        sfbl = wlc->SFBL;
                        lfbl = wlc->LFBL;
                }

                txrate = tx_info->status.rates;
                if (txrate[0].flags & IEEE80211_TX_RC_USE_RTS_CTS)
                        fbl = lfbl;
                else
                        fbl = sfbl;

                ieee80211_tx_info_clear_status(tx_info);

                if ((tx_frame_count > fbl) && (txrate[1].idx >= 0)) {
                        /*
                         * rate selection requested a fallback rate
                         * and we used it
                         */
                        txrate[0].count = fbl;
                        txrate[1].count = tx_frame_count - fbl;
                } else {
                        /*
                         * rate selection did not request fallback rate, or
                         * we didn't need it
                         */
                        txrate[0].count = tx_frame_count;
                        /*
                         * rc80211_minstrel.c:minstrel_tx_status() expects
                         * unused rates to be marked with idx = -1
                         */
                        txrate[1].idx = -1;
                        txrate[1].count = 0;
                }

                /* clear the rest of the rates */
                for (i = 2; i < IEEE80211_TX_MAX_RATES; i++) {
                        txrate[i].idx = -1;
                        txrate[i].count = 0;
                }

                if (txs->status & TX_STATUS_ACK_RCV)
                        tx_info->flags |= IEEE80211_TX_STAT_ACK;
        }

        totlen = p->len;
        free_pdu = true;

        if (lastframe) {
                /* remove PLCP & Broadcom tx descriptor header */
                skb_pull(p, D11_PHY_HDR_LEN);
                skb_pull(p, D11_TXH_LEN);
                ieee80211_tx_status_irqsafe(wlc->pub->ieee_hw, p);
        } else {
                brcms_err(wlc->hw->d11core,
                          "%s: Not last frame => not calling tx_status\n",
                          __func__);
        }

        fatal = false;

 out:
        if (fatal) {
                if (txh)
                        trace_brcms_txdesc(&wlc->hw->d11core->dev, txh,
                                           sizeof(*txh));
                if (p)
                        brcmu_pkt_buf_free_skb(p);
        }

        if (dma && queue < NFIFO) {
                u16 ac_queue = brcms_fifo_to_ac(queue);
                if (dma->txavail > TX_HEADROOM && queue < TX_BCMC_FIFO &&
                    ieee80211_queue_stopped(wlc->pub->ieee_hw, ac_queue))
                        ieee80211_wake_queue(wlc->pub->ieee_hw, ac_queue);
                dma_kick_tx(dma);
        }

        return fatal;
}

/* process tx completion events in BMAC
 * Return true if more tx status need to be processed. false otherwise.
 */
static bool
brcms_b_txstatus(struct brcms_hardware *wlc_hw, bool bound, bool *fatal)
{
        bool morepending = false;
        struct bcma_device *core;
        struct tx_status txstatus, *txs;
        u32 s1, s2;
        uint n = 0;
        /*
         * Param 'max_tx_num' indicates max. # tx status to process before
         * break out.
         */
        uint max_tx_num = bound ? TXSBND : -1;

        txs = &txstatus;
        core = wlc_hw->d11core;
        *fatal = false;
        s1 = bcma_read32(core, D11REGOFFS(frmtxstatus));
        while (!(*fatal)
               && (s1 & TXS_V)) {
                /* !give others some time to run! */
                if (n >= max_tx_num) {
                        morepending = true;
                        break;
                }

                if (s1 == 0xffffffff) {
                        brcms_err(core, "wl%d: %s: dead chip\n", wlc_hw->unit,
                                  __func__);
                        *fatal = true;
                        return false;
                }
                s2 = bcma_read32(core, D11REGOFFS(frmtxstatus2));

                txs->status = s1 & TXS_STATUS_MASK;
                txs->frameid = (s1 & TXS_FID_MASK) >> TXS_FID_SHIFT;
                txs->sequence = s2 & TXS_SEQ_MASK;
                txs->phyerr = (s2 & TXS_PTX_MASK) >> TXS_PTX_SHIFT;
                txs->lasttxtime = 0;

                *fatal = brcms_c_dotxstatus(wlc_hw->wlc, txs);

                s1 = bcma_read32(core, D11REGOFFS(frmtxstatus));
                n++;
        }

        if (*fatal)
                return false;

        return morepending;
}

static void brcms_c_tbtt(struct brcms_c_info *wlc)
{
        if (!wlc->bsscfg->BSS)
                /*
                 * DirFrmQ is now valid...defer setting until end
                 * of ATIM window
                 */
                wlc->qvalid |= MCMD_DIRFRMQVAL;
}

/* set initial host flags value */
static void
brcms_c_mhfdef(struct brcms_c_info *wlc, u16 *mhfs, u16 mhf2_init)
{
        struct brcms_hardware *wlc_hw = wlc->hw;

        memset(mhfs, 0, MHFMAX * sizeof(u16));

        mhfs[MHF2] |= mhf2_init;

        /* prohibit use of slowclock on multifunction boards */
        if (wlc_hw->boardflags & BFL_NOPLLDOWN)
                mhfs[MHF1] |= MHF1_FORCEFASTCLK;

        if (BRCMS_ISNPHY(wlc_hw->band) && NREV_LT(wlc_hw->band->phyrev, 2)) {
                mhfs[MHF2] |= MHF2_NPHY40MHZ_WAR;
                mhfs[MHF1] |= MHF1_IQSWAP_WAR;
        }
}

static uint
dmareg(uint direction, uint fifonum)
{
        if (direction == DMA_TX)
                return offsetof(struct d11regs, fifo64regs[fifonum].dmaxmt);
        return offsetof(struct d11regs, fifo64regs[fifonum].dmarcv);
}

static bool brcms_b_attach_dmapio(struct brcms_c_info *wlc, uint j, bool wme)
{
        uint i;
        char name[8];
        /*
         * ucode host flag 2 needed for pio mode, independent of band and fifo
         */
        u16 pio_mhf2 = 0;
        struct brcms_hardware *wlc_hw = wlc->hw;
        uint unit = wlc_hw->unit;

        /* name and offsets for dma_attach */
        snprintf(name, sizeof(name), "wl%d", unit);

        if (wlc_hw->di[0] == NULL) {    /* Init FIFOs */
                int dma_attach_err = 0;

                /*
                 * FIFO 0
                 * TX: TX_AC_BK_FIFO (TX AC Background data packets)
                 * RX: RX_FIFO (RX data packets)
                 */
                wlc_hw->di[0] = dma_attach(name, wlc,
                                           (wme ? dmareg(DMA_TX, 0) : 0),
                                           dmareg(DMA_RX, 0),
                                           (wme ? NTXD : 0), NRXD,
                                           RXBUFSZ, -1, NRXBUFPOST,
                                           BRCMS_HWRXOFF);
                dma_attach_err |= (NULL == wlc_hw->di[0]);

                /*
                 * FIFO 1
                 * TX: TX_AC_BE_FIFO (TX AC Best-Effort data packets)
                 *   (legacy) TX_DATA_FIFO (TX data packets)
                 * RX: UNUSED
                 */
                wlc_hw->di[1] = dma_attach(name, wlc,
                                           dmareg(DMA_TX, 1), 0,
                                           NTXD, 0, 0, -1, 0, 0);
                dma_attach_err |= (NULL == wlc_hw->di[1]);

                /*
                 * FIFO 2
                 * TX: TX_AC_VI_FIFO (TX AC Video data packets)
                 * RX: UNUSED
                 */
                wlc_hw->di[2] = dma_attach(name, wlc,
                                           dmareg(DMA_TX, 2), 0,
                                           NTXD, 0, 0, -1, 0, 0);
                dma_attach_err |= (NULL == wlc_hw->di[2]);
                /*
                 * FIFO 3
                 * TX: TX_AC_VO_FIFO (TX AC Voice data packets)
                 *   (legacy) TX_CTL_FIFO (TX control & mgmt packets)
                 */
                wlc_hw->di[3] = dma_attach(name, wlc,
                                           dmareg(DMA_TX, 3),
                                           0, NTXD, 0, 0, -1,
                                           0, 0);
                dma_attach_err |= (NULL == wlc_hw->di[3]);
/* Cleaner to leave this as if with AP defined */

                if (dma_attach_err) {
                        brcms_err(wlc_hw->d11core,
                                  "wl%d: wlc_attach: dma_attach failed\n",
                                  unit);
                        return false;
                }

                /* get pointer to dma engine tx flow control variable */
                for (i = 0; i < NFIFO; i++)
                        if (wlc_hw->di[i])
                                wlc_hw->txavail[i] =
                                    (uint *) dma_getvar(wlc_hw->di[i],
                                                        "&txavail");
        }

        /* initial ucode host flags */
        brcms_c_mhfdef(wlc, wlc_hw->band->mhfs, pio_mhf2);

        return true;
}

static void brcms_b_detach_dmapio(struct brcms_hardware *wlc_hw)
{
        uint j;

        for (j = 0; j < NFIFO; j++) {
                if (wlc_hw->di[j]) {
                        dma_detach(wlc_hw->di[j]);
                        wlc_hw->di[j] = NULL;
                }
        }
}

/*
 * Initialize brcms_c_info default values ...
 * may get overrides later in this function
 *  BMAC_NOTES, move low out and resolve the dangling ones
 */
static void brcms_b_info_init(struct brcms_hardware *wlc_hw)
{
        struct brcms_c_info *wlc = wlc_hw->wlc;

        /* set default sw macintmask value */
        wlc->defmacintmask = DEF_MACINTMASK;

        /* various 802.11g modes */
        wlc_hw->shortslot = false;

        wlc_hw->SFBL = RETRY_SHORT_FB;
        wlc_hw->LFBL = RETRY_LONG_FB;

        /* default mac retry limits */
        wlc_hw->SRL = RETRY_SHORT_DEF;
        wlc_hw->LRL = RETRY_LONG_DEF;
        wlc_hw->chanspec = ch20mhz_chspec(1);
}

static void brcms_b_wait_for_wake(struct brcms_hardware *wlc_hw)
{
        /* delay before first read of ucode state */
        udelay(40);

        /* wait until ucode is no longer asleep */
        SPINWAIT((brcms_b_read_shm(wlc_hw, M_UCODE_DBGST) ==
                  DBGST_ASLEEP), wlc_hw->wlc->fastpwrup_dly);
}

/* control chip clock to save power, enable dynamic clock or force fast clock */
static void brcms_b_clkctl_clk(struct brcms_hardware *wlc_hw, enum bcma_clkmode mode)
{
        if (ai_get_cccaps(wlc_hw->sih) & CC_CAP_PMU) {
                /* new chips with PMU, CCS_FORCEHT will distribute the HT clock
                 * on backplane, but mac core will still run on ALP(not HT) when
                 * it enters powersave mode, which means the FCA bit may not be
                 * set. Should wakeup mac if driver wants it to run on HT.
                 */

                if (wlc_hw->clk) {
                        if (mode == BCMA_CLKMODE_FAST) {
                                bcma_set32(wlc_hw->d11core,
                                           D11REGOFFS(clk_ctl_st),
                                           CCS_FORCEHT);

                                udelay(64);

                                SPINWAIT(
                                    ((bcma_read32(wlc_hw->d11core,
                                      D11REGOFFS(clk_ctl_st)) &
                                      CCS_HTAVAIL) == 0),
                                      PMU_MAX_TRANSITION_DLY);
                                WARN_ON(!(bcma_read32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st)) &
                                        CCS_HTAVAIL));
                        } else {
                                if ((ai_get_pmurev(wlc_hw->sih) == 0) &&
                                    (bcma_read32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st)) &
                                        (CCS_FORCEHT | CCS_HTAREQ)))
                                        SPINWAIT(
                                            ((bcma_read32(wlc_hw->d11core,
                                              offsetof(struct d11regs,
                                                       clk_ctl_st)) &
                                              CCS_HTAVAIL) == 0),
                                              PMU_MAX_TRANSITION_DLY);
                                bcma_mask32(wlc_hw->d11core,
                                        D11REGOFFS(clk_ctl_st),
                                        ~CCS_FORCEHT);
                        }
                }
                wlc_hw->forcefastclk = (mode == BCMA_CLKMODE_FAST);
        } else {

                /* old chips w/o PMU, force HT through cc,
                 * then use FCA to verify mac is running fast clock
                 */

                wlc_hw->forcefastclk = ai_clkctl_cc(wlc_hw->sih, mode);

                /* check fast clock is available (if core is not in reset) */
                if (wlc_hw->forcefastclk && wlc_hw->clk)
                        WARN_ON(!(bcma_aread32(wlc_hw->d11core, BCMA_IOST) &
                                  SISF_FCLKA));

                /*
                 * keep the ucode wake bit on if forcefastclk is on since we
                 * do not want ucode to put us back to slow clock when it dozes
                 * for PM mode. Code below matches the wake override bit with
                 * current forcefastclk state. Only setting bit in wake_override
                 * instead of waking ucode immediately since old code had this
                 * behavior. Older code set wlc->forcefastclk but only had the
                 * wake happen if the wakup_ucode work (protected by an up
                 * check) was executed just below.
                 */
                if (wlc_hw->forcefastclk)
                        mboolset(wlc_hw->wake_override,
                                 BRCMS_WAKE_OVERRIDE_FORCEFAST);
                else
                        mboolclr(wlc_hw->wake_override,
                                 BRCMS_WAKE_OVERRIDE_FORCEFAST);
        }
}

/* set or clear ucode host flag bits
 * it has an optimization for no-change write
 * it only writes through shared memory when the core has clock;
 * pre-CLK changes should use wlc_write_mhf to get around the optimization
 *
 *
 * bands values are: BRCM_BAND_AUTO <--- Current band only
 *                   BRCM_BAND_5G   <--- 5G band only
 *                   BRCM_BAND_2G   <--- 2G band only
 *                   BRCM_BAND_ALL  <--- All bands
 */
void
brcms_b_mhf(struct brcms_hardware *wlc_hw, u8 idx, u16 mask, u16 val,
             int bands)
{
        u16 save;
        u16 addr[MHFMAX] = {
                M_HOST_FLAGS1, M_HOST_FLAGS2, M_HOST_FLAGS3, M_HOST_FLAGS4,
                M_HOST_FLAGS5
        };
        struct brcms_hw_band *band;

        if ((val & ~mask) || idx >= MHFMAX)
                return; /* error condition */

        switch (bands) {
                /* Current band only or all bands,
                 * then set the band to current band
                 */
        case BRCM_BAND_AUTO:
        case BRCM_BAND_ALL:
                band = wlc_hw->band;
                break;
        case BRCM_BAND_5G:
                band = wlc_hw->bandstate[BAND_5G_INDEX];
                break;
        case BRCM_BAND_2G:
                band = wlc_hw->bandstate[BAND_2G_INDEX];
                break;
        default:
                band = NULL;    /* error condition */
        }

        if (band) {
                save = band->mhfs[idx];
                band->mhfs[idx] = (band->mhfs[idx] & ~mask) | val;

                /* optimization: only write through if changed, and
                 * changed band is the current band
                 */
                if (wlc_hw->clk && (band->mhfs[idx] != save)
                    && (band == wlc_hw->band))
                        brcms_b_write_shm(wlc_hw, addr[idx],
                                           (u16) band->mhfs[idx]);
        }

        if (bands == BRCM_BAND_ALL) {
                wlc_hw->bandstate[0]->mhfs[idx] =
                    (wlc_hw->bandstate[0]->mhfs[idx] & ~mask) | val;
                wlc_hw->bandstate[1]->mhfs[idx] =
                    (wlc_hw->bandstate[1]->mhfs[idx] & ~mask) | val;
        }
}

/* set the maccontrol register to desired reset state and
 * initialize the sw cache of the register
 */
static void brcms_c_mctrl_reset(struct brcms_hardware *wlc_hw)
{
        /* IHR accesses are always enabled, PSM disabled, HPS off and WAKE on */
        wlc_hw->maccontrol = 0;
        wlc_hw->suspended_fifos = 0;
        wlc_hw->wake_override = 0;
        wlc_hw->mute_override = 0;
        brcms_b_mctrl(wlc_hw, ~0, MCTL_IHR_EN | MCTL_WAKE);
}

/*
 * write the software state of maccontrol and
 * overrides to the maccontrol register
 */
static void brcms_c_mctrl_write(struct brcms_hardware *wlc_hw)
{
        u32 maccontrol = wlc_hw->maccontrol;

        /* OR in the wake bit if overridden */
        if (wlc_hw->wake_override)
                maccontrol |= MCTL_WAKE;

        /* set AP and INFRA bits for mute if needed */
        if (wlc_hw->mute_override) {
                maccontrol &= ~(MCTL_AP);
                maccontrol |= MCTL_INFRA;
        }

        bcma_write32(wlc_hw->d11core, D11REGOFFS(maccontrol),
                     maccontrol);
}

/* set or clear maccontrol bits */
void brcms_b_mctrl(struct brcms_hardware *wlc_hw, u32 mask, u32 val)
{
        u32 maccontrol;
        u32 new_maccontrol;

        if (val & ~mask)
                return; /* error condition */
        maccontrol = wlc_hw->maccontrol;
        new_maccontrol = (maccontrol & ~mask) | val;

        /* if the new maccontrol value is the same as the old, nothing to do */
        if (new_maccontrol == maccontrol)
                return;

        /* something changed, cache the new value */
        wlc_hw->maccontrol = new_maccontrol;

        /* write the new values with overrides applied */
        brcms_c_mctrl_write(wlc_hw);
}

void brcms_c_ucode_wake_override_set(struct brcms_hardware *wlc_hw,
                                 u32 override_bit)
{
        if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE)) {
                mboolset(wlc_hw->wake_override, override_bit);
                return;
        }

        mboolset(wlc_hw->wake_override, override_bit);

        brcms_c_mctrl_write(wlc_hw);
        brcms_b_wait_for_wake(wlc_hw);
}

void brcms_c_ucode_wake_override_clear(struct brcms_hardware *wlc_hw,
                                   u32 override_bit)
{
        mboolclr(wlc_hw->wake_override, override_bit);

        if (wlc_hw->wake_override || (wlc_hw->maccontrol & MCTL_WAKE))
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/* When driver needs ucode to stop beaconing, it has to make sure that
 * MCTL_AP is clear and MCTL_INFRA is set
 * Mode           MCTL_AP        MCTL_INFRA
 * AP                1              1
 * STA               0              1 <--- This will ensure no beacons
 * IBSS              0              0
 */
static void brcms_c_ucode_mute_override_set(struct brcms_hardware *wlc_hw)
{
        wlc_hw->mute_override = 1;

        /* if maccontrol already has AP == 0 and INFRA == 1 without this
         * override, then there is no change to write
         */
        if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/* Clear the override on AP and INFRA bits */
static void brcms_c_ucode_mute_override_clear(struct brcms_hardware *wlc_hw)
{
        if (wlc_hw->mute_override == 0)
                return;

        wlc_hw->mute_override = 0;

        /* if maccontrol already has AP == 0 and INFRA == 1 without this
         * override, then there is no change to write
         */
        if ((wlc_hw->maccontrol & (MCTL_AP | MCTL_INFRA)) == MCTL_INFRA)
                return;

        brcms_c_mctrl_write(wlc_hw);
}

/*
 * Write a MAC address to the given match reg offset in the RXE match engine.
 */
static void
brcms_b_set_addrmatch(struct brcms_hardware *wlc_hw, int match_reg_offset,
                       const u8 *addr)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 mac_l;
        u16 mac_m;
        u16 mac_h;

        brcms_dbg_rx(core, "wl%d: brcms_b_set_addrmatch\n", wlc_hw->unit);

        mac_l = addr[0] | (addr[1] << 8);
        mac_m = addr[2] | (addr[3] << 8);
        mac_h = addr[4] | (addr[5] << 8);

        /* enter the MAC addr into the RXE match registers */
        bcma_write16(core, D11REGOFFS(rcm_ctl),
                     RCM_INC_DATA | match_reg_offset);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_l);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_m);
        bcma_write16(core, D11REGOFFS(rcm_mat_data), mac_h);
}

void
brcms_b_write_template_ram(struct brcms_hardware *wlc_hw, int offset, int len,
                            void *buf)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 word;
        __le32 word_le;
        __be32 word_be;
        bool be_bit;
        brcms_dbg_info(core, "wl%d\n", wlc_hw->unit);

        bcma_write32(core, D11REGOFFS(tplatewrptr), offset);

        /* if MCTL_BIGEND bit set in mac control register,
         * the chip swaps data in fifo, as well as data in
         * template ram
         */
        be_bit = (bcma_read32(core, D11REGOFFS(maccontrol)) & MCTL_BIGEND) != 0;

        while (len > 0) {
                memcpy(&word, buf, sizeof(u32));

                if (be_bit) {
                        word_be = cpu_to_be32(word);
                        word = *(u32 *)&word_be;
                } else {
                        word_le = cpu_to_le32(word);
                        word = *(u32 *)&word_le;
                }

                bcma_write32(core, D11REGOFFS(tplatewrdata), word);

                buf = (u8 *) buf + sizeof(u32);
                len -= sizeof(u32);
        }
}

static void brcms_b_set_cwmin(struct brcms_hardware *wlc_hw, u16 newmin)
{
        wlc_hw->band->CWmin = newmin;

        bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_CWMIN);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
        bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), newmin);
}

static void brcms_b_set_cwmax(struct brcms_hardware *wlc_hw, u16 newmax)
{
        wlc_hw->band->CWmax = newmax;

        bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_CWMAX);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
        bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), newmax);
}

void brcms_b_bw_set(struct brcms_hardware *wlc_hw, u16 bw)
{
        bool fastclk;

        /* request FAST clock if not on */
        fastclk = wlc_hw->forcefastclk;
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        wlc_phy_bw_state_set(wlc_hw->band->pi, bw);

        brcms_b_phy_reset(wlc_hw);
        wlc_phy_init(wlc_hw->band->pi, wlc_phy_chanspec_get(wlc_hw->band->pi));

        /* restore the clk */
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
}

static void brcms_b_upd_synthpu(struct brcms_hardware *wlc_hw)
{
        u16 v;
        struct brcms_c_info *wlc = wlc_hw->wlc;
        /* update SYNTHPU_DLY */

        if (BRCMS_ISLCNPHY(wlc->band))
                v = SYNTHPU_DLY_LPPHY_US;
        else if (BRCMS_ISNPHY(wlc->band) && (NREV_GE(wlc->band->phyrev, 3)))
                v = SYNTHPU_DLY_NPHY_US;
        else
                v = SYNTHPU_DLY_BPHY_US;

        brcms_b_write_shm(wlc_hw, M_SYNTHPU_DLY, v);
}

static void brcms_c_ucode_txant_set(struct brcms_hardware *wlc_hw)
{
        u16 phyctl;
        u16 phytxant = wlc_hw->bmac_phytxant;
        u16 mask = PHY_TXC_ANT_MASK;

        /* set the Probe Response frame phy control word */
        phyctl = brcms_b_read_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS);
        phyctl = (phyctl & ~mask) | phytxant;
        brcms_b_write_shm(wlc_hw, M_CTXPRS_BLK + C_CTX_PCTLWD_POS, phyctl);

        /* set the Response (ACK/CTS) frame phy control word */
        phyctl = brcms_b_read_shm(wlc_hw, M_RSP_PCTLWD);
        phyctl = (phyctl & ~mask) | phytxant;
        brcms_b_write_shm(wlc_hw, M_RSP_PCTLWD, phyctl);
}

static u16 brcms_b_ofdm_ratetable_offset(struct brcms_hardware *wlc_hw,
                                         u8 rate)
{
        uint i;
        u8 plcp_rate = 0;
        struct plcp_signal_rate_lookup {
                u8 rate;
                u8 signal_rate;
        };
        /* OFDM RATE sub-field of PLCP SIGNAL field, per 802.11 sec 17.3.4.1 */
        const struct plcp_signal_rate_lookup rate_lookup[] = {
                {BRCM_RATE_6M, 0xB},
                {BRCM_RATE_9M, 0xF},
                {BRCM_RATE_12M, 0xA},
                {BRCM_RATE_18M, 0xE},
                {BRCM_RATE_24M, 0x9},
                {BRCM_RATE_36M, 0xD},
                {BRCM_RATE_48M, 0x8},
                {BRCM_RATE_54M, 0xC}
        };

        for (i = 0; i < ARRAY_SIZE(rate_lookup); i++) {
                if (rate == rate_lookup[i].rate) {
                        plcp_rate = rate_lookup[i].signal_rate;
                        break;
                }
        }

        /* Find the SHM pointer to the rate table entry by looking in the
         * Direct-map Table
         */
        return 2 * brcms_b_read_shm(wlc_hw, M_RT_DIRMAP_A + (plcp_rate * 2));
}

static void brcms_upd_ofdm_pctl1_table(struct brcms_hardware *wlc_hw)
{
        u8 rate;
        u8 rates[8] = {
                BRCM_RATE_6M, BRCM_RATE_9M, BRCM_RATE_12M, BRCM_RATE_18M,
                BRCM_RATE_24M, BRCM_RATE_36M, BRCM_RATE_48M, BRCM_RATE_54M
        };
        u16 entry_ptr;
        u16 pctl1;
        uint i;

        if (!BRCMS_PHY_11N_CAP(wlc_hw->band))
                return;

        /* walk the phy rate table and update the entries */
        for (i = 0; i < ARRAY_SIZE(rates); i++) {
                rate = rates[i];

                entry_ptr = brcms_b_ofdm_ratetable_offset(wlc_hw, rate);

                /* read the SHM Rate Table entry OFDM PCTL1 values */
                pctl1 =
                    brcms_b_read_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS);

                /* modify the value */
                pctl1 &= ~PHY_TXC1_MODE_MASK;
                pctl1 |= (wlc_hw->hw_stf_ss_opmode << PHY_TXC1_MODE_SHIFT);

                /* Update the SHM Rate Table entry OFDM PCTL1 values */
                brcms_b_write_shm(wlc_hw, entry_ptr + M_RT_OFDM_PCTL1_POS,
                                   pctl1);
        }
}

/* band-specific init */
static void brcms_b_bsinit(struct brcms_c_info *wlc, u16 chanspec)
{
        struct brcms_hardware *wlc_hw = wlc->hw;

        brcms_dbg_mac80211(wlc_hw->d11core, "wl%d: bandunit %d\n", wlc_hw->unit,
                           wlc_hw->band->bandunit);

        brcms_c_ucode_bsinit(wlc_hw);

        wlc_phy_init(wlc_hw->band->pi, chanspec);

        brcms_c_ucode_txant_set(wlc_hw);

        /*
         * cwmin is band-specific, update hardware
         * with value for current band
         */
        brcms_b_set_cwmin(wlc_hw, wlc_hw->band->CWmin);
        brcms_b_set_cwmax(wlc_hw, wlc_hw->band->CWmax);

        brcms_b_update_slot_timing(wlc_hw,
                                   wlc_hw->band->bandtype == BRCM_BAND_5G ?
                                   true : wlc_hw->shortslot);

        /* write phytype and phyvers */
        brcms_b_write_shm(wlc_hw, M_PHYTYPE, (u16) wlc_hw->band->phytype);
        brcms_b_write_shm(wlc_hw, M_PHYVER, (u16) wlc_hw->band->phyrev);

        /*
         * initialize the txphyctl1 rate table since
         * shmem is shared between bands
         */
        brcms_upd_ofdm_pctl1_table(wlc_hw);

        brcms_b_upd_synthpu(wlc_hw);
}

/* Perform a soft reset of the PHY PLL */
void brcms_b_core_phypll_reset(struct brcms_hardware *wlc_hw)
{
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_addr),
                  ~0, 0);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 0);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 4);
        udelay(1);
        ai_cc_reg(wlc_hw->sih, offsetof(struct chipcregs, chipcontrol_data),
                  0x4, 0);
        udelay(1);
}

/* light way to turn on phy clock without reset for NPHY only
 *  refer to brcms_b_core_phy_clk for full version
 */
void brcms_b_phyclk_fgc(struct brcms_hardware *wlc_hw, bool clk)
{
        /* support(necessary for NPHY and HYPHY) only */
        if (!BRCMS_ISNPHY(wlc_hw->band))
                return;

        if (ON == clk)
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, SICF_FGC);
        else
                brcms_b_core_ioctl(wlc_hw, SICF_FGC, 0);

}

void brcms_b_macphyclk_set(struct brcms_hardware *wlc_hw, bool clk)
{
        if (ON == clk)
                brcms_b_core_ioctl(wlc_hw, SICF_MPCLKE, SICF_MPCLKE);
        else
                brcms_b_core_ioctl(wlc_hw, SICF_MPCLKE, 0);
}

void brcms_b_phy_reset(struct brcms_hardware *wlc_hw)
{
        struct brcms_phy_pub *pih = wlc_hw->band->pi;
        u32 phy_bw_clkbits;
        bool phy_in_reset = false;

        brcms_dbg_info(wlc_hw->d11core, "wl%d: reset phy\n", wlc_hw->unit);

        if (pih == NULL)
                return;

        phy_bw_clkbits = wlc_phy_clk_bwbits(wlc_hw->band->pi);

        /* Specific reset sequence required for NPHY rev 3 and 4 */
        if (BRCMS_ISNPHY(wlc_hw->band) && NREV_GE(wlc_hw->band->phyrev, 3) &&
            NREV_LE(wlc_hw->band->phyrev, 4)) {
                /* Set the PHY bandwidth */
                brcms_b_core_ioctl(wlc_hw, SICF_BWMASK, phy_bw_clkbits);

                udelay(1);

                /* Perform a soft reset of the PHY PLL */
                brcms_b_core_phypll_reset(wlc_hw);

                /* reset the PHY */
                brcms_b_core_ioctl(wlc_hw, (SICF_PRST | SICF_PCLKE),
                                   (SICF_PRST | SICF_PCLKE));
                phy_in_reset = true;
        } else {
                brcms_b_core_ioctl(wlc_hw,
                                   (SICF_PRST | SICF_PCLKE | SICF_BWMASK),
                                   (SICF_PRST | SICF_PCLKE | phy_bw_clkbits));
        }

        udelay(2);
        brcms_b_core_phy_clk(wlc_hw, ON);

        if (pih)
                wlc_phy_anacore(pih, ON);
}

/* switch to and initialize new band */
static void brcms_b_setband(struct brcms_hardware *wlc_hw, uint bandunit,
                            u16 chanspec) {
        struct brcms_c_info *wlc = wlc_hw->wlc;
        u32 macintmask;

        /* Enable the d11 core before accessing it */
        if (!bcma_core_is_enabled(wlc_hw->d11core)) {
                bcma_core_enable(wlc_hw->d11core, 0);
                brcms_c_mctrl_reset(wlc_hw);
        }

        macintmask = brcms_c_setband_inact(wlc, bandunit);

        if (!wlc_hw->up)
                return;

        brcms_b_core_phy_clk(wlc_hw, ON);

        /* band-specific initializations */
        brcms_b_bsinit(wlc, chanspec);

        /*
         * If there are any pending software interrupt bits,
         * then replace these with a harmless nonzero value
         * so brcms_c_dpc() will re-enable interrupts when done.
         */
        if (wlc->macintstatus)
                wlc->macintstatus = MI_DMAINT;

        /* restore macintmask */
        brcms_intrsrestore(wlc->wl, macintmask);

        /* ucode should still be suspended.. */
        WARN_ON((bcma_read32(wlc_hw->d11core, D11REGOFFS(maccontrol)) &
                 MCTL_EN_MAC) != 0);
}

static bool brcms_c_isgoodchip(struct brcms_hardware *wlc_hw)
{

        /* reject unsupported corerev */
        if (!CONF_HAS(D11CONF, wlc_hw->corerev)) {
                wiphy_err(wlc_hw->wlc->wiphy, "unsupported core rev %d\n",
                          wlc_hw->corerev);
                return false;
        }

        return true;
}

/* Validate some board info parameters */
static bool brcms_c_validboardtype(struct brcms_hardware *wlc_hw)
{
        uint boardrev = wlc_hw->boardrev;

        /* 4 bits each for board type, major, minor, and tiny version */
        uint brt = (boardrev & 0xf000) >> 12;
        uint b0 = (boardrev & 0xf00) >> 8;
        uint b1 = (boardrev & 0xf0) >> 4;
        uint b2 = boardrev & 0xf;

        /* voards from other vendors are always considered valid */
        if (ai_get_boardvendor(wlc_hw->sih) != PCI_VENDOR_ID_BROADCOM)
                return true;

        /* do some boardrev sanity checks when boardvendor is Broadcom */
        if (boardrev == 0)
                return false;

        if (boardrev <= 0xff)
                return true;

        if ((brt > 2) || (brt == 0) || (b0 > 9) || (b0 == 0) || (b1 > 9)
                || (b2 > 9))
                return false;

        return true;
}

static void brcms_c_get_macaddr(struct brcms_hardware *wlc_hw, u8 etheraddr[ETH_ALEN])
{
        struct ssb_sprom *sprom = &wlc_hw->d11core->bus->sprom;

        /* If macaddr exists, use it (Sromrev4, CIS, ...). */
        if (!is_zero_ether_addr(sprom->il0mac)) {
                memcpy(etheraddr, sprom->il0mac, 6);
                return;
        }

        if (wlc_hw->_nbands > 1)
                memcpy(etheraddr, sprom->et1mac, 6);
        else
                memcpy(etheraddr, sprom->il0mac, 6);
}

/* power both the pll and external oscillator on/off */
static void brcms_b_xtal(struct brcms_hardware *wlc_hw, bool want)
{
        brcms_dbg_info(wlc_hw->d11core, "wl%d: want %d\n", wlc_hw->unit, want);

        /*
         * dont power down if plldown is false or
         * we must poll hw radio disable
         */
        if (!want && wlc_hw->pllreq)
                return;

        wlc_hw->sbclk = want;
        if (!wlc_hw->sbclk) {
                wlc_hw->clk = false;
                if (wlc_hw->band && wlc_hw->band->pi)
                        wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
        }
}

/*
 * Return true if radio is disabled, otherwise false.
 * hw radio disable signal is an external pin, users activate it asynchronously
 * this function could be called when driver is down and w/o clock
 * it operates on different registers depending on corerev and boardflag.
 */
static bool brcms_b_radio_read_hwdisabled(struct brcms_hardware *wlc_hw)
{
        bool v, clk, xtal;
        u32 flags = 0;

        xtal = wlc_hw->sbclk;
        if (!xtal)
                brcms_b_xtal(wlc_hw, ON);

        /* may need to take core out of reset first */
        clk = wlc_hw->clk;
        if (!clk) {
                /*
                 * mac no longer enables phyclk automatically when driver
                 * accesses phyreg throughput mac. This can be skipped since
                 * only mac reg is accessed below
                 */
                if (D11REV_GE(wlc_hw->corerev, 18))
                        flags |= SICF_PCLKE;

                /*
                 * TODO: test suspend/resume
                 *
                 * AI chip doesn't restore bar0win2 on
                 * hibernation/resume, need sw fixup
                 */

                bcma_core_enable(wlc_hw->d11core, flags);
                brcms_c_mctrl_reset(wlc_hw);
        }

        v = ((bcma_read32(wlc_hw->d11core,
                          D11REGOFFS(phydebug)) & PDBG_RFD) != 0);

        /* put core back into reset */
        if (!clk)
                bcma_core_disable(wlc_hw->d11core, 0);

        if (!xtal)
                brcms_b_xtal(wlc_hw, OFF);

        return v;
}

static bool wlc_dma_rxreset(struct brcms_hardware *wlc_hw, uint fifo)
{
        struct dma_pub *di = wlc_hw->di[fifo];
        return dma_rxreset(di);
}

/* d11 core reset
 *   ensure fask clock during reset
 *   reset dma
 *   reset d11(out of reset)
 *   reset phy(out of reset)
 *   clear software macintstatus for fresh new start
 * one testing hack wlc_hw->noreset will bypass the d11/phy reset
 */
void brcms_b_corereset(struct brcms_hardware *wlc_hw, u32 flags)
{
        uint i;
        bool fastclk;

        if (flags == BRCMS_USE_COREFLAGS)
                flags = (wlc_hw->band->pi ? wlc_hw->band->core_flags : 0);

        brcms_dbg_info(wlc_hw->d11core, "wl%d: core reset\n", wlc_hw->unit);

        /* request FAST clock if not on  */
        fastclk = wlc_hw->forcefastclk;
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        /* reset the dma engines except first time thru */
        if (bcma_core_is_enabled(wlc_hw->d11core)) {
                for (i = 0; i < NFIFO; i++)
                        if ((wlc_hw->di[i]) && (!dma_txreset(wlc_hw->di[i])))
                                brcms_err(wlc_hw->d11core, "wl%d: %s: "
                                          "dma_txreset[%d]: cannot stop dma\n",
                                           wlc_hw->unit, __func__, i);

                if ((wlc_hw->di[RX_FIFO])
                    && (!wlc_dma_rxreset(wlc_hw, RX_FIFO)))
                        brcms_err(wlc_hw->d11core, "wl%d: %s: dma_rxreset"
                                  "[%d]: cannot stop dma\n",
                                  wlc_hw->unit, __func__, RX_FIFO);
        }
        /* if noreset, just stop the psm and return */
        if (wlc_hw->noreset) {
                wlc_hw->wlc->macintstatus = 0;  /* skip wl_dpc after down */
                brcms_b_mctrl(wlc_hw, MCTL_PSM_RUN | MCTL_EN_MAC, 0);
                return;
        }

        /*
         * mac no longer enables phyclk automatically when driver accesses
         * phyreg throughput mac, AND phy_reset is skipped at early stage when
         * band->pi is invalid. need to enable PHY CLK
         */
        if (D11REV_GE(wlc_hw->corerev, 18))
                flags |= SICF_PCLKE;

        /*
         * reset the core
         * In chips with PMU, the fastclk request goes through d11 core
         * reg 0x1e0, which is cleared by the core_reset. have to re-request it.
         *
         * This adds some delay and we can optimize it by also requesting
         * fastclk through chipcommon during this period if necessary. But
         * that has to work coordinate with other driver like mips/arm since
         * they may touch chipcommon as well.
         */
        wlc_hw->clk = false;
        bcma_core_enable(wlc_hw->d11core, flags);
        wlc_hw->clk = true;
        if (wlc_hw->band && wlc_hw->band->pi)
                wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, true);

        brcms_c_mctrl_reset(wlc_hw);

        if (ai_get_cccaps(wlc_hw->sih) & CC_CAP_PMU)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        brcms_b_phy_reset(wlc_hw);

        /* turn on PHY_PLL */
        brcms_b_core_phypll_ctl(wlc_hw, true);

        /* clear sw intstatus */
        wlc_hw->wlc->macintstatus = 0;

        /* restore the clk setting */
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
}

/* txfifo sizes needs to be modified(increased) since the newer cores
 * have more memory.
 */
static void brcms_b_corerev_fifofixup(struct brcms_hardware *wlc_hw)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 fifo_nu;
        u16 txfifo_startblk = TXFIFO_START_BLK, txfifo_endblk;
        u16 txfifo_def, txfifo_def1;
        u16 txfifo_cmd;

        /* tx fifos start at TXFIFO_START_BLK from the Base address */
        txfifo_startblk = TXFIFO_START_BLK;

        /* sequence of operations:  reset fifo, set fifo size, reset fifo */
        for (fifo_nu = 0; fifo_nu < NFIFO; fifo_nu++) {

                txfifo_endblk = txfifo_startblk + wlc_hw->xmtfifo_sz[fifo_nu];
                txfifo_def = (txfifo_startblk & 0xff) |
                    (((txfifo_endblk - 1) & 0xff) << TXFIFO_FIFOTOP_SHIFT);
                txfifo_def1 = ((txfifo_startblk >> 8) & 0x1) |
                    ((((txfifo_endblk -
                        1) >> 8) & 0x1) << TXFIFO_FIFOTOP_SHIFT);
                txfifo_cmd =
                    TXFIFOCMD_RESET_MASK | (fifo_nu << TXFIFOCMD_FIFOSEL_SHIFT);

                bcma_write16(core, D11REGOFFS(xmtfifocmd), txfifo_cmd);
                bcma_write16(core, D11REGOFFS(xmtfifodef), txfifo_def);
                bcma_write16(core, D11REGOFFS(xmtfifodef1), txfifo_def1);

                bcma_write16(core, D11REGOFFS(xmtfifocmd), txfifo_cmd);

                txfifo_startblk += wlc_hw->xmtfifo_sz[fifo_nu];
        }
        /*
         * need to propagate to shm location to be in sync since ucode/hw won't
         * do this
         */
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE0,
                           wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]);
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE1,
                           wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]);
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE2,
                           ((wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO] << 8) | wlc_hw->
                            xmtfifo_sz[TX_AC_BK_FIFO]));
        brcms_b_write_shm(wlc_hw, M_FIFOSIZE3,
                           ((wlc_hw->xmtfifo_sz[TX_ATIM_FIFO] << 8) | wlc_hw->
                            xmtfifo_sz[TX_BCMC_FIFO]));
}

/* This function is used for changing the tsf frac register
 * If spur avoidance mode is off, the mac freq will be 80/120/160Mhz
 * If spur avoidance mode is on1, the mac freq will be 82/123/164Mhz
 * If spur avoidance mode is on2, the mac freq will be 84/126/168Mhz
 * HTPHY Formula is 2^26/freq(MHz) e.g.
 * For spuron2 - 126MHz -> 2^26/126 = 532610.0
 *  - 532610 = 0x82082 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x2082
 * For spuron: 123MHz -> 2^26/123    = 545600.5
 *  - 545601 = 0x85341 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x5341
 * For spur off: 120MHz -> 2^26/120    = 559240.5
 *  - 559241 = 0x88889 => tsf_clk_frac_h = 0x8, tsf_clk_frac_l = 0x8889
 */

void brcms_b_switch_macfreq(struct brcms_hardware *wlc_hw, u8 spurmode)
{
        struct bcma_device *core = wlc_hw->d11core;

        if ((ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM43224) ||
            (ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM43225)) {
                if (spurmode == WL_SPURAVOID_ON2) {     /* 126Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x2082);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                } else if (spurmode == WL_SPURAVOID_ON1) {      /* 123Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x5341);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                } else {        /* 120Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x8889);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0x8);
                }
        } else if (BRCMS_ISLCNPHY(wlc_hw->band)) {
                if (spurmode == WL_SPURAVOID_ON1) {     /* 82Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0x7CE0);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0xC);
                } else {        /* 80Mhz */
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_l), 0xCCCD);
                        bcma_write16(core, D11REGOFFS(tsf_clk_frac_h), 0xC);
                }
        }
}

/* Initialize GPIOs that are controlled by D11 core */
static void brcms_c_gpio_init(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 gc, gm;

        /* use GPIO select 0 to get all gpio signals from the gpio out reg */
        brcms_b_mctrl(wlc_hw, MCTL_GPOUT_SEL_MASK, 0);

        /*
         * Common GPIO setup:
         *      G0 = LED 0 = WLAN Activity
         *      G1 = LED 1 = WLAN 2.4 GHz Radio State
         *      G2 = LED 2 = WLAN 5 GHz Radio State
         *      G4 = radio disable input (HI enabled, LO disabled)
         */

        gc = gm = 0;

        /* Allocate GPIOs for mimo antenna diversity feature */
        if (wlc_hw->antsel_type == ANTSEL_2x3) {
                /* Enable antenna diversity, use 2x3 mode */
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
                             MHF3_ANTSEL_EN, BRCM_BAND_ALL);
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE,
                             MHF3_ANTSEL_MODE, BRCM_BAND_ALL);

                /* init superswitch control */
                wlc_phy_antsel_init(wlc_hw->band->pi, false);

        } else if (wlc_hw->antsel_type == ANTSEL_2x4) {
                gm |= gc |= (BOARD_GPIO_12 | BOARD_GPIO_13);
                /*
                 * The board itself is powered by these GPIOs
                 * (when not sending pattern) so set them high
                 */
                bcma_set16(wlc_hw->d11core, D11REGOFFS(psm_gpio_oe),
                           (BOARD_GPIO_12 | BOARD_GPIO_13));
                bcma_set16(wlc_hw->d11core, D11REGOFFS(psm_gpio_out),
                           (BOARD_GPIO_12 | BOARD_GPIO_13));

                /* Enable antenna diversity, use 2x4 mode */
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_EN,
                             MHF3_ANTSEL_EN, BRCM_BAND_ALL);
                brcms_b_mhf(wlc_hw, MHF3, MHF3_ANTSEL_MODE, 0,
                             BRCM_BAND_ALL);

                /* Configure the desired clock to be 4Mhz */
                brcms_b_write_shm(wlc_hw, M_ANTSEL_CLKDIV,
                                   ANTSEL_CLKDIV_4MHZ);
        }

        /*
         * gpio 9 controls the PA. ucode is responsible
         * for wiggling out and oe
         */
        if (wlc_hw->boardflags & BFL_PACTRL)
                gm |= gc |= BOARD_GPIO_PACTRL;

        /* apply to gpiocontrol register */
        bcma_chipco_gpio_control(&wlc_hw->d11core->bus->drv_cc, gm, gc);
}

static void brcms_ucode_write(struct brcms_hardware *wlc_hw,
                              const __le32 ucode[], const size_t nbytes)
{
        struct bcma_device *core = wlc_hw->d11core;
        uint i;
        uint count;

        brcms_dbg_info(wlc_hw->d11core, "wl%d\n", wlc_hw->unit);

        count = (nbytes / sizeof(u32));

        bcma_write32(core, D11REGOFFS(objaddr),
                     OBJADDR_AUTO_INC | OBJADDR_UCM_SEL);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        for (i = 0; i < count; i++)
                bcma_write32(core, D11REGOFFS(objdata), le32_to_cpu(ucode[i]));

}

static void brcms_ucode_download(struct brcms_hardware *wlc_hw)
{
        struct brcms_c_info *wlc;
        struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode;

        wlc = wlc_hw->wlc;

        if (wlc_hw->ucode_loaded)
                return;

        if (D11REV_IS(wlc_hw->corerev, 17) || D11REV_IS(wlc_hw->corerev, 23)) {
                if (BRCMS_ISNPHY(wlc_hw->band)) {
                        brcms_ucode_write(wlc_hw, ucode->bcm43xx_16_mimo,
                                          ucode->bcm43xx_16_mimosz);
                        wlc_hw->ucode_loaded = true;
                } else
                        brcms_err(wlc_hw->d11core,
                                  "%s: wl%d: unsupported phy in corerev %d\n",
                                  __func__, wlc_hw->unit, wlc_hw->corerev);
        } else if (D11REV_IS(wlc_hw->corerev, 24)) {
                if (BRCMS_ISLCNPHY(wlc_hw->band)) {
                        brcms_ucode_write(wlc_hw, ucode->bcm43xx_24_lcn,
                                          ucode->bcm43xx_24_lcnsz);
                        wlc_hw->ucode_loaded = true;
                } else {
                        brcms_err(wlc_hw->d11core,
                                  "%s: wl%d: unsupported phy in corerev %d\n",
                                  __func__, wlc_hw->unit, wlc_hw->corerev);
                }
        }
}

void brcms_b_txant_set(struct brcms_hardware *wlc_hw, u16 phytxant)
{
        /* update sw state */
        wlc_hw->bmac_phytxant = phytxant;

        /* push to ucode if up */
        if (!wlc_hw->up)
                return;
        brcms_c_ucode_txant_set(wlc_hw);

}

u16 brcms_b_get_txant(struct brcms_hardware *wlc_hw)
{
        return (u16) wlc_hw->wlc->stf->txant;
}

void brcms_b_antsel_type_set(struct brcms_hardware *wlc_hw, u8 antsel_type)
{
        wlc_hw->antsel_type = antsel_type;

        /* Update the antsel type for phy module to use */
        wlc_phy_antsel_type_set(wlc_hw->band->pi, antsel_type);
}

static void brcms_b_fifoerrors(struct brcms_hardware *wlc_hw)
{
        bool fatal = false;
        uint unit;
        uint intstatus, idx;
        struct bcma_device *core = wlc_hw->d11core;

        unit = wlc_hw->unit;

        for (idx = 0; idx < NFIFO; idx++) {
                /* read intstatus register and ignore any non-error bits */
                intstatus =
                        bcma_read32(core,
                                    D11REGOFFS(intctrlregs[idx].intstatus)) &
                        I_ERRORS;
                if (!intstatus)
                        continue;

                brcms_dbg_int(core, "wl%d: intstatus%d 0x%x\n",
                              unit, idx, intstatus);

                if (intstatus & I_RO) {
                        brcms_err(core, "wl%d: fifo %d: receive fifo "
                                  "overflow\n", unit, idx);
                        fatal = true;
                }

                if (intstatus & I_PC) {
                        brcms_err(core, "wl%d: fifo %d: descriptor error\n",
                                  unit, idx);
                        fatal = true;
                }

                if (intstatus & I_PD) {
                        brcms_err(core, "wl%d: fifo %d: data error\n", unit,
                                  idx);
                        fatal = true;
                }

                if (intstatus & I_DE) {
                        brcms_err(core, "wl%d: fifo %d: descriptor protocol "
                                  "error\n", unit, idx);
                        fatal = true;
                }

                if (intstatus & I_RU)
                        brcms_err(core, "wl%d: fifo %d: receive descriptor "
                                  "underflow\n", idx, unit);

                if (intstatus & I_XU) {
                        brcms_err(core, "wl%d: fifo %d: transmit fifo "
                                  "underflow\n", idx, unit);
                        fatal = true;
                }

                if (fatal) {
                        brcms_fatal_error(wlc_hw->wlc->wl); /* big hammer */
                        break;
                } else
                        bcma_write32(core,
                                     D11REGOFFS(intctrlregs[idx].intstatus),
                                     intstatus);
        }
}

void brcms_c_intrson(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        wlc->macintmask = wlc->defmacintmask;
        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), wlc->macintmask);
}

u32 brcms_c_intrsoff(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintmask;

        if (!wlc_hw->clk)
                return 0;

        macintmask = wlc->macintmask;   /* isr can still happen */

        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), 0);
        (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(macintmask));
        udelay(1);              /* ensure int line is no longer driven */
        wlc->macintmask = 0;

        /* return previous macintmask; resolve race between us and our isr */
        return wlc->macintstatus ? 0 : macintmask;
}

void brcms_c_intrsrestore(struct brcms_c_info *wlc, u32 macintmask)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        if (!wlc_hw->clk)
                return;

        wlc->macintmask = macintmask;
        bcma_write32(wlc_hw->d11core, D11REGOFFS(macintmask), wlc->macintmask);
}

/* assumes that the d11 MAC is enabled */
static void brcms_b_tx_fifo_suspend(struct brcms_hardware *wlc_hw,
                                    uint tx_fifo)
{
        u8 fifo = 1 << tx_fifo;

        /* Two clients of this code, 11h Quiet period and scanning. */

        /* only suspend if not already suspended */
        if ((wlc_hw->suspended_fifos & fifo) == fifo)
                return;

        /* force the core awake only if not already */
        if (wlc_hw->suspended_fifos == 0)
                brcms_c_ucode_wake_override_set(wlc_hw,
                                                BRCMS_WAKE_OVERRIDE_TXFIFO);

        wlc_hw->suspended_fifos |= fifo;

        if (wlc_hw->di[tx_fifo]) {
                /*
                 * Suspending AMPDU transmissions in the middle can cause
                 * underflow which may result in mismatch between ucode and
                 * driver so suspend the mac before suspending the FIFO
                 */
                if (BRCMS_PHY_11N_CAP(wlc_hw->band))
                        brcms_c_suspend_mac_and_wait(wlc_hw->wlc);

                dma_txsuspend(wlc_hw->di[tx_fifo]);

                if (BRCMS_PHY_11N_CAP(wlc_hw->band))
                        brcms_c_enable_mac(wlc_hw->wlc);
        }
}

static void brcms_b_tx_fifo_resume(struct brcms_hardware *wlc_hw,
                                   uint tx_fifo)
{
        /* BMAC_NOTE: BRCMS_TX_FIFO_ENAB is done in brcms_c_dpc() for DMA case
         * but need to be done here for PIO otherwise the watchdog will catch
         * the inconsistency and fire
         */
        /* Two clients of this code, 11h Quiet period and scanning. */
        if (wlc_hw->di[tx_fifo])
                dma_txresume(wlc_hw->di[tx_fifo]);

        /* allow core to sleep again */
        if (wlc_hw->suspended_fifos == 0)
                return;
        else {
                wlc_hw->suspended_fifos &= ~(1 << tx_fifo);
                if (wlc_hw->suspended_fifos == 0)
                        brcms_c_ucode_wake_override_clear(wlc_hw,
                                                BRCMS_WAKE_OVERRIDE_TXFIFO);
        }
}

/* precondition: requires the mac core to be enabled */
static void brcms_b_mute(struct brcms_hardware *wlc_hw, bool mute_tx)
{
        static const u8 null_ether_addr[ETH_ALEN] = {0, 0, 0, 0, 0, 0};

        if (mute_tx) {
                /* suspend tx fifos */
                brcms_b_tx_fifo_suspend(wlc_hw, TX_DATA_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_CTL_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_BK_FIFO);
                brcms_b_tx_fifo_suspend(wlc_hw, TX_AC_VI_FIFO);

                /* zero the address match register so we do not send ACKs */
                brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
                                       null_ether_addr);
        } else {
                /* resume tx fifos */
                brcms_b_tx_fifo_resume(wlc_hw, TX_DATA_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_CTL_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_AC_BK_FIFO);
                brcms_b_tx_fifo_resume(wlc_hw, TX_AC_VI_FIFO);

                /* Restore address */
                brcms_b_set_addrmatch(wlc_hw, RCM_MAC_OFFSET,
                                       wlc_hw->etheraddr);
        }

        wlc_phy_mute_upd(wlc_hw->band->pi, mute_tx, 0);

        if (mute_tx)
                brcms_c_ucode_mute_override_set(wlc_hw);
        else
                brcms_c_ucode_mute_override_clear(wlc_hw);
}

void
brcms_c_mute(struct brcms_c_info *wlc, bool mute_tx)
{
        brcms_b_mute(wlc->hw, mute_tx);
}

/*
 * Read and clear macintmask and macintstatus and intstatus registers.
 * This routine should be called with interrupts off
 * Return:
 *   -1 if brcms_deviceremoved(wlc) evaluates to true;
 *   0 if the interrupt is not for us, or we are in some special cases;
 *   device interrupt status bits otherwise.
 */
static inline u32 wlc_intstatus(struct brcms_c_info *wlc, bool in_isr)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 macintstatus, mask;

        /* macintstatus includes a DMA interrupt summary bit */
        macintstatus = bcma_read32(core, D11REGOFFS(macintstatus));
        mask = in_isr ? wlc->macintmask : wlc->defmacintmask;

        trace_brcms_macintstatus(&core->dev, in_isr, macintstatus, mask);

        /* detect cardbus removed, in power down(suspend) and in reset */
        if (brcms_deviceremoved(wlc))
                return -1;

        /* brcms_deviceremoved() succeeds even when the core is still resetting,
         * handle that case here.
         */
        if (macintstatus == 0xffffffff)
                return 0;

        /* defer unsolicited interrupts */
        macintstatus &= mask;

        /* if not for us */
        if (macintstatus == 0)
                return 0;

        /* turn off the interrupts */
        bcma_write32(core, D11REGOFFS(macintmask), 0);
        (void)bcma_read32(core, D11REGOFFS(macintmask));
        wlc->macintmask = 0;

        /* clear device interrupts */
        bcma_write32(core, D11REGOFFS(macintstatus), macintstatus);

        /* MI_DMAINT is indication of non-zero intstatus */
        if (macintstatus & MI_DMAINT)
                /*
                 * only fifo interrupt enabled is I_RI in
                 * RX_FIFO. If MI_DMAINT is set, assume it
                 * is set and clear the interrupt.
                 */
                bcma_write32(core, D11REGOFFS(intctrlregs[RX_FIFO].intstatus),
                             DEF_RXINTMASK);

        return macintstatus;
}

/* Update wlc->macintstatus and wlc->intstatus[]. */
/* Return true if they are updated successfully. false otherwise */
bool brcms_c_intrsupd(struct brcms_c_info *wlc)
{
        u32 macintstatus;

        /* read and clear macintstatus and intstatus registers */
        macintstatus = wlc_intstatus(wlc, false);

        /* device is removed */
        if (macintstatus == 0xffffffff)
                return false;

        /* update interrupt status in software */
        wlc->macintstatus |= macintstatus;

        return true;
}

/*
 * First-level interrupt processing.
 * Return true if this was our interrupt
 * and if further brcms_c_dpc() processing is required,
 * false otherwise.
 */
bool brcms_c_isr(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        u32 macintstatus;

        if (!wlc_hw->up || !wlc->macintmask)
                return false;

        /* read and clear macintstatus and intstatus registers */
        macintstatus = wlc_intstatus(wlc, true);

        if (macintstatus == 0xffffffff) {
                brcms_err(wlc_hw->d11core,
                          "DEVICEREMOVED detected in the ISR code path\n");
                return false;
        }

        /* it is not for us */
        if (macintstatus == 0)
                return false;

        /* save interrupt status bits */
        wlc->macintstatus = macintstatus;

        return true;

}

void brcms_c_suspend_mac_and_wait(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 mc, mi;

        brcms_dbg_mac80211(core, "wl%d: bandunit %d\n", wlc_hw->unit,
                           wlc_hw->band->bandunit);

        /*
         * Track overlapping suspend requests
         */
        wlc_hw->mac_suspend_depth++;
        if (wlc_hw->mac_suspend_depth > 1)
                return;

        /* force the core awake */
        brcms_c_ucode_wake_override_set(wlc_hw, BRCMS_WAKE_OVERRIDE_MACSUSPEND);

        mc = bcma_read32(core, D11REGOFFS(maccontrol));

        if (mc == 0xffffffff) {
                brcms_err(core, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_PSM_RUN));
        WARN_ON(!(mc & MCTL_EN_MAC));

        mi = bcma_read32(core, D11REGOFFS(macintstatus));
        if (mi == 0xffffffff) {
                brcms_err(core, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mi & MI_MACSSPNDD);

        brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, 0);

        SPINWAIT(!(bcma_read32(core, D11REGOFFS(macintstatus)) & MI_MACSSPNDD),
                 BRCMS_MAX_MAC_SUSPEND);

        if (!(bcma_read32(core, D11REGOFFS(macintstatus)) & MI_MACSSPNDD)) {
                brcms_err(core, "wl%d: wlc_suspend_mac_and_wait: waited %d uS"
                          " and MI_MACSSPNDD is still not on.\n",
                          wlc_hw->unit, BRCMS_MAX_MAC_SUSPEND);
                brcms_err(core, "wl%d: psmdebug 0x%08x, phydebug 0x%08x, "
                          "psm_brc 0x%04x\n", wlc_hw->unit,
                          bcma_read32(core, D11REGOFFS(psmdebug)),
                          bcma_read32(core, D11REGOFFS(phydebug)),
                          bcma_read16(core, D11REGOFFS(psm_brc)));
        }

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        if (mc == 0xffffffff) {
                brcms_err(core, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return;
        }
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_PSM_RUN));
        WARN_ON(mc & MCTL_EN_MAC);
}

void brcms_c_enable_mac(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 mc, mi;

        brcms_dbg_mac80211(core, "wl%d: bandunit %d\n", wlc_hw->unit,
                           wlc->band->bandunit);

        /*
         * Track overlapping suspend requests
         */
        wlc_hw->mac_suspend_depth--;
        if (wlc_hw->mac_suspend_depth > 0)
                return;

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(mc & MCTL_EN_MAC);
        WARN_ON(!(mc & MCTL_PSM_RUN));

        brcms_b_mctrl(wlc_hw, MCTL_EN_MAC, MCTL_EN_MAC);
        bcma_write32(core, D11REGOFFS(macintstatus), MI_MACSSPNDD);

        mc = bcma_read32(core, D11REGOFFS(maccontrol));
        WARN_ON(mc & MCTL_PSM_JMP_0);
        WARN_ON(!(mc & MCTL_EN_MAC));
        WARN_ON(!(mc & MCTL_PSM_RUN));

        mi = bcma_read32(core, D11REGOFFS(macintstatus));
        WARN_ON(mi & MI_MACSSPNDD);

        brcms_c_ucode_wake_override_clear(wlc_hw,
                                          BRCMS_WAKE_OVERRIDE_MACSUSPEND);
}

void brcms_b_band_stf_ss_set(struct brcms_hardware *wlc_hw, u8 stf_mode)
{
        wlc_hw->hw_stf_ss_opmode = stf_mode;

        if (wlc_hw->clk)
                brcms_upd_ofdm_pctl1_table(wlc_hw);
}

static bool brcms_b_validate_chip_access(struct brcms_hardware *wlc_hw)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 w, val;
        struct wiphy *wiphy = wlc_hw->wlc->wiphy;

        /* Validate dchip register access */

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        w = bcma_read32(core, D11REGOFFS(objdata));

        /* Can we write and read back a 32bit register? */
        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), (u32) 0xaa5555aa);

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        val = bcma_read32(core, D11REGOFFS(objdata));
        if (val != (u32) 0xaa5555aa) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
                          "expected 0xaa5555aa\n", wlc_hw->unit, val);
                return false;
        }

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), (u32) 0x55aaaa55);

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        val = bcma_read32(core, D11REGOFFS(objdata));
        if (val != (u32) 0x55aaaa55) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: SHM = 0x%x, "
                          "expected 0x55aaaa55\n", wlc_hw->unit, val);
                return false;
        }

        bcma_write32(core, D11REGOFFS(objaddr), OBJADDR_SHM_SEL | 0);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), w);

        /* clear CFPStart */
        bcma_write32(core, D11REGOFFS(tsf_cfpstart), 0);

        w = bcma_read32(core, D11REGOFFS(maccontrol));
        if ((w != (MCTL_IHR_EN | MCTL_WAKE)) &&
            (w != (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE))) {
                wiphy_err(wiphy, "wl%d: validate_chip_access: maccontrol = "
                          "0x%x, expected 0x%x or 0x%x\n", wlc_hw->unit, w,
                          (MCTL_IHR_EN | MCTL_WAKE),
                          (MCTL_IHR_EN | MCTL_GMODE | MCTL_WAKE));
                return false;
        }

        return true;
}

#define PHYPLL_WAIT_US  100000

void brcms_b_core_phypll_ctl(struct brcms_hardware *wlc_hw, bool on)
{
        struct bcma_device *core = wlc_hw->d11core;
        u32 tmp;

        brcms_dbg_info(core, "wl%d\n", wlc_hw->unit);

        tmp = 0;

        if (on) {
                if ((ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM4313)) {
                        bcma_set32(core, D11REGOFFS(clk_ctl_st),
                                   CCS_ERSRC_REQ_HT |
                                   CCS_ERSRC_REQ_D11PLL |
                                   CCS_ERSRC_REQ_PHYPLL);
                        SPINWAIT((bcma_read32(core, D11REGOFFS(clk_ctl_st)) &
                                  CCS_ERSRC_AVAIL_HT) != CCS_ERSRC_AVAIL_HT,
                                 PHYPLL_WAIT_US);

                        tmp = bcma_read32(core, D11REGOFFS(clk_ctl_st));
                        if ((tmp & CCS_ERSRC_AVAIL_HT) != CCS_ERSRC_AVAIL_HT)
                                brcms_err(core, "%s: turn on PHY PLL failed\n",
                                          __func__);
                } else {
                        bcma_set32(core, D11REGOFFS(clk_ctl_st),
                                   tmp | CCS_ERSRC_REQ_D11PLL |
                                   CCS_ERSRC_REQ_PHYPLL);
                        SPINWAIT((bcma_read32(core, D11REGOFFS(clk_ctl_st)) &
                                  (CCS_ERSRC_AVAIL_D11PLL |
                                   CCS_ERSRC_AVAIL_PHYPLL)) !=
                                 (CCS_ERSRC_AVAIL_D11PLL |
                                  CCS_ERSRC_AVAIL_PHYPLL), PHYPLL_WAIT_US);

                        tmp = bcma_read32(core, D11REGOFFS(clk_ctl_st));
                        if ((tmp &
                             (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL))
                            !=
                            (CCS_ERSRC_AVAIL_D11PLL | CCS_ERSRC_AVAIL_PHYPLL))
                                brcms_err(core, "%s: turn on PHY PLL failed\n",
                                          __func__);
                }
        } else {
                /*
                 * Since the PLL may be shared, other cores can still
                 * be requesting it; so we'll deassert the request but
                 * not wait for status to comply.
                 */
                bcma_mask32(core, D11REGOFFS(clk_ctl_st),
                            ~CCS_ERSRC_REQ_PHYPLL);
                (void)bcma_read32(core, D11REGOFFS(clk_ctl_st));
        }
}

static void brcms_c_coredisable(struct brcms_hardware *wlc_hw)
{
        bool dev_gone;

        brcms_dbg_info(wlc_hw->d11core, "wl%d: disable core\n", wlc_hw->unit);

        dev_gone = brcms_deviceremoved(wlc_hw->wlc);

        if (dev_gone)
                return;

        if (wlc_hw->noreset)
                return;

        /* radio off */
        wlc_phy_switch_radio(wlc_hw->band->pi, OFF);

        /* turn off analog core */
        wlc_phy_anacore(wlc_hw->band->pi, OFF);

        /* turn off PHYPLL to save power */
        brcms_b_core_phypll_ctl(wlc_hw, false);

        wlc_hw->clk = false;
        bcma_core_disable(wlc_hw->d11core, 0);
        wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);
}

static void brcms_c_flushqueues(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        uint i;

        /* free any posted tx packets */
        for (i = 0; i < NFIFO; i++) {
                if (wlc_hw->di[i]) {
                        dma_txreclaim(wlc_hw->di[i], DMA_RANGE_ALL);
                        if (i < TX_BCMC_FIFO)
                                ieee80211_wake_queue(wlc->pub->ieee_hw,
                                                     brcms_fifo_to_ac(i));
                }
        }

        /* free any posted rx packets */
        dma_rxreclaim(wlc_hw->di[RX_FIFO]);
}

static u16
brcms_b_read_objmem(struct brcms_hardware *wlc_hw, uint offset, u32 sel)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 objoff = D11REGOFFS(objdata);

        bcma_write32(core, D11REGOFFS(objaddr), sel | (offset >> 2));
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        if (offset & 2)
                objoff += 2;

        return bcma_read16(core, objoff);
}

static void
brcms_b_write_objmem(struct brcms_hardware *wlc_hw, uint offset, u16 v,
                     u32 sel)
{
        struct bcma_device *core = wlc_hw->d11core;
        u16 objoff = D11REGOFFS(objdata);

        bcma_write32(core, D11REGOFFS(objaddr), sel | (offset >> 2));
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        if (offset & 2)
                objoff += 2;

        bcma_wflush16(core, objoff, v);
}

/*
 * Read a single u16 from shared memory.
 * SHM 'offset' needs to be an even address
 */
u16 brcms_b_read_shm(struct brcms_hardware *wlc_hw, uint offset)
{
        return brcms_b_read_objmem(wlc_hw, offset, OBJADDR_SHM_SEL);
}

/*
 * Write a single u16 to shared memory.
 * SHM 'offset' needs to be an even address
 */
void brcms_b_write_shm(struct brcms_hardware *wlc_hw, uint offset, u16 v)
{
        brcms_b_write_objmem(wlc_hw, offset, v, OBJADDR_SHM_SEL);
}

/*
 * Copy a buffer to shared memory of specified type .
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 * 'sel' selects the type of memory
 */
void
brcms_b_copyto_objmem(struct brcms_hardware *wlc_hw, uint offset,
                      const void *buf, int len, u32 sel)
{
        u16 v;
        const u8 *p = (const u8 *)buf;
        int i;

        if (len <= 0 || (offset & 1) || (len & 1))
                return;

        for (i = 0; i < len; i += 2) {
                v = p[i] | (p[i + 1] << 8);
                brcms_b_write_objmem(wlc_hw, offset + i, v, sel);
        }
}

/*
 * Copy a piece of shared memory of specified type to a buffer .
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 * 'sel' selects the type of memory
 */
void
brcms_b_copyfrom_objmem(struct brcms_hardware *wlc_hw, uint offset, void *buf,
                         int len, u32 sel)
{
        u16 v;
        u8 *p = (u8 *) buf;
        int i;

        if (len <= 0 || (offset & 1) || (len & 1))
                return;

        for (i = 0; i < len; i += 2) {
                v = brcms_b_read_objmem(wlc_hw, offset + i, sel);
                p[i] = v & 0xFF;
                p[i + 1] = (v >> 8) & 0xFF;
        }
}

/* Copy a buffer to shared memory.
 * SHM 'offset' needs to be an even address and
 * Buffer length 'len' must be an even number of bytes
 */
static void brcms_c_copyto_shm(struct brcms_c_info *wlc, uint offset,
                        const void *buf, int len)
{
        brcms_b_copyto_objmem(wlc->hw, offset, buf, len, OBJADDR_SHM_SEL);
}

static void brcms_b_retrylimit_upd(struct brcms_hardware *wlc_hw,
                                   u16 SRL, u16 LRL)
{
        wlc_hw->SRL = SRL;
        wlc_hw->LRL = LRL;

        /* write retry limit to SCR, shouldn't need to suspend */
        if (wlc_hw->up) {
                bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                             OBJADDR_SCR_SEL | S_DOT11_SRC_LMT);
                (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
                bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), wlc_hw->SRL);
                bcma_write32(wlc_hw->d11core, D11REGOFFS(objaddr),
                             OBJADDR_SCR_SEL | S_DOT11_LRC_LMT);
                (void)bcma_read32(wlc_hw->d11core, D11REGOFFS(objaddr));
                bcma_write32(wlc_hw->d11core, D11REGOFFS(objdata), wlc_hw->LRL);
        }
}

static void brcms_b_pllreq(struct brcms_hardware *wlc_hw, bool set, u32 req_bit)
{
        if (set) {
                if (mboolisset(wlc_hw->pllreq, req_bit))
                        return;

                mboolset(wlc_hw->pllreq, req_bit);

                if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) {
                        if (!wlc_hw->sbclk)
                                brcms_b_xtal(wlc_hw, ON);
                }
        } else {
                if (!mboolisset(wlc_hw->pllreq, req_bit))
                        return;

                mboolclr(wlc_hw->pllreq, req_bit);

                if (mboolisset(wlc_hw->pllreq, BRCMS_PLLREQ_FLIP)) {
                        if (wlc_hw->sbclk)
                                brcms_b_xtal(wlc_hw, OFF);
                }
        }
}

static void brcms_b_antsel_set(struct brcms_hardware *wlc_hw, u32 antsel_avail)
{
        wlc_hw->antsel_avail = antsel_avail;
}

/*
 * conditions under which the PM bit should be set in outgoing frames
 * and STAY_AWAKE is meaningful
 */
static bool brcms_c_ps_allowed(struct brcms_c_info *wlc)
{
        struct brcms_bss_cfg *cfg = wlc->bsscfg;

        /* disallow PS when one of the following global conditions meets */
        if (!wlc->pub->associated)
                return false;

        /* disallow PS when one of these meets when not scanning */
        if (wlc->filter_flags & FIF_PROMISC_IN_BSS)
                return false;

        if (cfg->associated) {
                /*
                 * disallow PS when one of the following
                 * bsscfg specific conditions meets
                 */
                if (!cfg->BSS)
                        return false;

                return false;
        }

        return true;
}

static void brcms_c_statsupd(struct brcms_c_info *wlc)
{
        int i;
        struct macstat macstats;
#ifdef DEBUG
        u16 delta;
        u16 rxf0ovfl;
        u16 txfunfl[NFIFO];
#endif                          /* DEBUG */

        /* if driver down, make no sense to update stats */
        if (!wlc->pub->up)
                return;

#ifdef DEBUG
        /* save last rx fifo 0 overflow count */
        rxf0ovfl = wlc->core->macstat_snapshot->rxf0ovfl;

        /* save last tx fifo  underflow count */
        for (i = 0; i < NFIFO; i++)
                txfunfl[i] = wlc->core->macstat_snapshot->txfunfl[i];
#endif                          /* DEBUG */

        /* Read mac stats from contiguous shared memory */
        brcms_b_copyfrom_objmem(wlc->hw, M_UCODE_MACSTAT, &macstats,
                                sizeof(struct macstat), OBJADDR_SHM_SEL);

#ifdef DEBUG
        /* check for rx fifo 0 overflow */
        delta = (u16) (wlc->core->macstat_snapshot->rxf0ovfl - rxf0ovfl);
        if (delta)
                brcms_err(wlc->hw->d11core, "wl%d: %u rx fifo 0 overflows!\n",
                          wlc->pub->unit, delta);

        /* check for tx fifo underflows */
        for (i = 0; i < NFIFO; i++) {
                delta =
                    (u16) (wlc->core->macstat_snapshot->txfunfl[i] -
                              txfunfl[i]);
                if (delta)
                        brcms_err(wlc->hw->d11core,
                                  "wl%d: %u tx fifo %d underflows!\n",
                                  wlc->pub->unit, delta, i);
        }
#endif                          /* DEBUG */

        /* merge counters from dma module */
        for (i = 0; i < NFIFO; i++) {
                if (wlc->hw->di[i])
                        dma_counterreset(wlc->hw->di[i]);
        }
}

static void brcms_b_reset(struct brcms_hardware *wlc_hw)
{
        /* reset the core */
        if (!brcms_deviceremoved(wlc_hw->wlc))
                brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

        /* purge the dma rings */
        brcms_c_flushqueues(wlc_hw->wlc);
}

void brcms_c_reset(struct brcms_c_info *wlc)
{
        brcms_dbg_info(wlc->hw->d11core, "wl%d\n", wlc->pub->unit);

        /* slurp up hw mac counters before core reset */
        brcms_c_statsupd(wlc);

        /* reset our snapshot of macstat counters */
        memset((char *)wlc->core->macstat_snapshot, 0,
                sizeof(struct macstat));

        brcms_b_reset(wlc->hw);
}

void brcms_c_init_scb(struct scb *scb)
{
        int i;

        memset(scb, 0, sizeof(struct scb));
        scb->flags = SCB_WMECAP | SCB_HTCAP;
        for (i = 0; i < NUMPRIO; i++) {
                scb->seqnum[i] = 0;
                scb->seqctl[i] = 0xFFFF;
        }

        scb->seqctl_nonqos = 0xFFFF;
        scb->magic = SCB_MAGIC;
}

/* d11 core init
 *   reset PSM
 *   download ucode/PCM
 *   let ucode run to suspended
 *   download ucode inits
 *   config other core registers
 *   init dma
 */
static void brcms_b_coreinit(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;
        u32 sflags;
        u32 bcnint_us;
        uint i = 0;
        bool fifosz_fixup = false;
        int err = 0;
        u16 buf[NFIFO];
        struct brcms_ucode *ucode = &wlc_hw->wlc->wl->ucode;

        brcms_dbg_info(core, "wl%d: core init\n", wlc_hw->unit);

        /* reset PSM */
        brcms_b_mctrl(wlc_hw, ~0, (MCTL_IHR_EN | MCTL_PSM_JMP_0 | MCTL_WAKE));

        brcms_ucode_download(wlc_hw);
        /*
         * FIFOSZ fixup. driver wants to controls the fifo allocation.
         */
        fifosz_fixup = true;

        /* let the PSM run to the suspended state, set mode to BSS STA */
        bcma_write32(core, D11REGOFFS(macintstatus), -1);
        brcms_b_mctrl(wlc_hw, ~0,
                       (MCTL_IHR_EN | MCTL_INFRA | MCTL_PSM_RUN | MCTL_WAKE));

        /* wait for ucode to self-suspend after auto-init */
        SPINWAIT(((bcma_read32(core, D11REGOFFS(macintstatus)) &
                   MI_MACSSPNDD) == 0), 1000 * 1000);
        if ((bcma_read32(core, D11REGOFFS(macintstatus)) & MI_MACSSPNDD) == 0)
                brcms_err(core, "wl%d: wlc_coreinit: ucode did not self-"
                          "suspend!\n", wlc_hw->unit);

        brcms_c_gpio_init(wlc);

        sflags = bcma_aread32(core, BCMA_IOST);

        if (D11REV_IS(wlc_hw->corerev, 17) || D11REV_IS(wlc_hw->corerev, 23)) {
                if (BRCMS_ISNPHY(wlc_hw->band))
                        brcms_c_write_inits(wlc_hw, ucode->d11n0initvals16);
                else
                        brcms_err(core, "%s: wl%d: unsupported phy in corerev"
                                  " %d\n", __func__, wlc_hw->unit,
                                  wlc_hw->corerev);
        } else if (D11REV_IS(wlc_hw->corerev, 24)) {
                if (BRCMS_ISLCNPHY(wlc_hw->band))
                        brcms_c_write_inits(wlc_hw, ucode->d11lcn0initvals24);
                else
                        brcms_err(core, "%s: wl%d: unsupported phy in corerev"
                                  " %d\n", __func__, wlc_hw->unit,
                                  wlc_hw->corerev);
        } else {
                brcms_err(core, "%s: wl%d: unsupported corerev %d\n",
                          __func__, wlc_hw->unit, wlc_hw->corerev);
        }

        /* For old ucode, txfifo sizes needs to be modified(increased) */
        if (fifosz_fixup)
                brcms_b_corerev_fifofixup(wlc_hw);

        /* check txfifo allocations match between ucode and driver */
        buf[TX_AC_BE_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE0);
        if (buf[TX_AC_BE_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BE_FIFO]) {
                i = TX_AC_BE_FIFO;
                err = -1;
        }
        buf[TX_AC_VI_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE1);
        if (buf[TX_AC_VI_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VI_FIFO]) {
                i = TX_AC_VI_FIFO;
                err = -1;
        }
        buf[TX_AC_BK_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE2);
        buf[TX_AC_VO_FIFO] = (buf[TX_AC_BK_FIFO] >> 8) & 0xff;
        buf[TX_AC_BK_FIFO] &= 0xff;
        if (buf[TX_AC_BK_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_BK_FIFO]) {
                i = TX_AC_BK_FIFO;
                err = -1;
        }
        if (buf[TX_AC_VO_FIFO] != wlc_hw->xmtfifo_sz[TX_AC_VO_FIFO]) {
                i = TX_AC_VO_FIFO;
                err = -1;
        }
        buf[TX_BCMC_FIFO] = brcms_b_read_shm(wlc_hw, M_FIFOSIZE3);
        buf[TX_ATIM_FIFO] = (buf[TX_BCMC_FIFO] >> 8) & 0xff;
        buf[TX_BCMC_FIFO] &= 0xff;
        if (buf[TX_BCMC_FIFO] != wlc_hw->xmtfifo_sz[TX_BCMC_FIFO]) {
                i = TX_BCMC_FIFO;
                err = -1;
        }
        if (buf[TX_ATIM_FIFO] != wlc_hw->xmtfifo_sz[TX_ATIM_FIFO]) {
                i = TX_ATIM_FIFO;
                err = -1;
        }
        if (err != 0)
                brcms_err(core, "wlc_coreinit: txfifo mismatch: ucode size %d"
                          " driver size %d index %d\n", buf[i],
                          wlc_hw->xmtfifo_sz[i], i);

        /* make sure we can still talk to the mac */
        WARN_ON(bcma_read32(core, D11REGOFFS(maccontrol)) == 0xffffffff);

        /* band-specific inits done by wlc_bsinit() */

        /* Set up frame burst size and antenna swap threshold init values */
        brcms_b_write_shm(wlc_hw, M_MBURST_SIZE, MAXTXFRAMEBURST);
        brcms_b_write_shm(wlc_hw, M_MAX_ANTCNT, ANTCNT);

        /* enable one rx interrupt per received frame */
        bcma_write32(core, D11REGOFFS(intrcvlazy[0]), (1 << IRL_FC_SHIFT));

        /* set the station mode (BSS STA) */
        brcms_b_mctrl(wlc_hw,
                       (MCTL_INFRA | MCTL_DISCARD_PMQ | MCTL_AP),
                       (MCTL_INFRA | MCTL_DISCARD_PMQ));

        /* set up Beacon interval */
        bcnint_us = 0x8000 << 10;
        bcma_write32(core, D11REGOFFS(tsf_cfprep),
                     (bcnint_us << CFPREP_CBI_SHIFT));
        bcma_write32(core, D11REGOFFS(tsf_cfpstart), bcnint_us);
        bcma_write32(core, D11REGOFFS(macintstatus), MI_GP1);

        /* write interrupt mask */
        bcma_write32(core, D11REGOFFS(intctrlregs[RX_FIFO].intmask),
                     DEF_RXINTMASK);

        /* allow the MAC to control the PHY clock (dynamic on/off) */
        brcms_b_macphyclk_set(wlc_hw, ON);

        /* program dynamic clock control fast powerup delay register */
        wlc->fastpwrup_dly = ai_clkctl_fast_pwrup_delay(wlc_hw->sih);
        bcma_write16(core, D11REGOFFS(scc_fastpwrup_dly), wlc->fastpwrup_dly);

        /* tell the ucode the corerev */
        brcms_b_write_shm(wlc_hw, M_MACHW_VER, (u16) wlc_hw->corerev);

        /* tell the ucode MAC capabilities */
        brcms_b_write_shm(wlc_hw, M_MACHW_CAP_L,
                           (u16) (wlc_hw->machwcap & 0xffff));
        brcms_b_write_shm(wlc_hw, M_MACHW_CAP_H,
                           (u16) ((wlc_hw->
                                      machwcap >> 16) & 0xffff));

        /* write retry limits to SCR, this done after PSM init */
        bcma_write32(core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_SRC_LMT);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), wlc_hw->SRL);
        bcma_write32(core, D11REGOFFS(objaddr),
                     OBJADDR_SCR_SEL | S_DOT11_LRC_LMT);
        (void)bcma_read32(core, D11REGOFFS(objaddr));
        bcma_write32(core, D11REGOFFS(objdata), wlc_hw->LRL);

        /* write rate fallback retry limits */
        brcms_b_write_shm(wlc_hw, M_SFRMTXCNTFBRTHSD, wlc_hw->SFBL);
        brcms_b_write_shm(wlc_hw, M_LFRMTXCNTFBRTHSD, wlc_hw->LFBL);

        bcma_mask16(core, D11REGOFFS(ifs_ctl), 0x0FFF);
        bcma_write16(core, D11REGOFFS(ifs_aifsn), EDCF_AIFSN_MIN);

        /* init the tx dma engines */
        for (i = 0; i < NFIFO; i++) {
                if (wlc_hw->di[i])
                        dma_txinit(wlc_hw->di[i]);
        }

        /* init the rx dma engine(s) and post receive buffers */
        dma_rxinit(wlc_hw->di[RX_FIFO]);
        dma_rxfill(wlc_hw->di[RX_FIFO]);
}

void
static brcms_b_init(struct brcms_hardware *wlc_hw, u16 chanspec) {
        u32 macintmask;
        bool fastclk;
        struct brcms_c_info *wlc = wlc_hw->wlc;

        /* request FAST clock if not on */
        fastclk = wlc_hw->forcefastclk;
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        /* disable interrupts */
        macintmask = brcms_intrsoff(wlc->wl);

        /* set up the specified band and chanspec */
        brcms_c_setxband(wlc_hw, chspec_bandunit(chanspec));
        wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec);

        /* do one-time phy inits and calibration */
        wlc_phy_cal_init(wlc_hw->band->pi);

        /* core-specific initialization */
        brcms_b_coreinit(wlc);

        /* band-specific inits */
        brcms_b_bsinit(wlc, chanspec);

        /* restore macintmask */
        brcms_intrsrestore(wlc->wl, macintmask);

        /* seed wake_override with BRCMS_WAKE_OVERRIDE_MACSUSPEND since the mac
         * is suspended and brcms_c_enable_mac() will clear this override bit.
         */
        mboolset(wlc_hw->wake_override, BRCMS_WAKE_OVERRIDE_MACSUSPEND);

        /*
         * initialize mac_suspend_depth to 1 to match ucode
         * initial suspended state
         */
        wlc_hw->mac_suspend_depth = 1;

        /* restore the clk */
        if (!fastclk)
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
}

static void brcms_c_set_phy_chanspec(struct brcms_c_info *wlc,
                                     u16 chanspec)
{
        /* Save our copy of the chanspec */
        wlc->chanspec = chanspec;

        /* Set the chanspec and power limits for this locale */
        brcms_c_channel_set_chanspec(wlc->cmi, chanspec, BRCMS_TXPWR_MAX);

        if (wlc->stf->ss_algosel_auto)
                brcms_c_stf_ss_algo_channel_get(wlc, &wlc->stf->ss_algo_channel,
                                            chanspec);

        brcms_c_stf_ss_update(wlc, wlc->band);
}

static void
brcms_default_rateset(struct brcms_c_info *wlc, struct brcms_c_rateset *rs)
{
        brcms_c_rateset_default(rs, NULL, wlc->band->phytype,
                wlc->band->bandtype, false, BRCMS_RATE_MASK_FULL,
                (bool) (wlc->pub->_n_enab & SUPPORT_11N),
                brcms_chspec_bw(wlc->default_bss->chanspec),
                wlc->stf->txstreams);
}

/* derive wlc->band->basic_rate[] table from 'rateset' */
static void brcms_c_rate_lookup_init(struct brcms_c_info *wlc,
                              struct brcms_c_rateset *rateset)
{
        u8 rate;
        u8 mandatory;
        u8 cck_basic = 0;
        u8 ofdm_basic = 0;
        u8 *br = wlc->band->basic_rate;
        uint i;

        /* incoming rates are in 500kbps units as in 802.11 Supported Rates */
        memset(br, 0, BRCM_MAXRATE + 1);

        /* For each basic rate in the rates list, make an entry in the
         * best basic lookup.
         */
        for (i = 0; i < rateset->count; i++) {
                /* only make an entry for a basic rate */
                if (!(rateset->rates[i] & BRCMS_RATE_FLAG))
                        continue;

                /* mask off basic bit */
                rate = (rateset->rates[i] & BRCMS_RATE_MASK);

                if (rate > BRCM_MAXRATE) {
                        brcms_err(wlc->hw->d11core, "brcms_c_rate_lookup_init: "
                                  "invalid rate 0x%X in rate set\n",
                                  rateset->rates[i]);
                        continue;
                }

                br[rate] = rate;
        }

        /* The rate lookup table now has non-zero entries for each
         * basic rate, equal to the basic rate: br[basicN] = basicN
         *
         * To look up the best basic rate corresponding to any
         * particular rate, code can use the basic_rate table
         * like this
         *
         * basic_rate = wlc->band->basic_rate[tx_rate]
         *
         * Make sure there is a best basic rate entry for
         * every rate by walking up the table from low rates
         * to high, filling in holes in the lookup table
         */

        for (i = 0; i < wlc->band->hw_rateset.count; i++) {
                rate = wlc->band->hw_rateset.rates[i];

                if (br[rate] != 0) {
                        /* This rate is a basic rate.
                         * Keep track of the best basic rate so far by
                         * modulation type.
                         */
                        if (is_ofdm_rate(rate))
                                ofdm_basic = rate;
                        else
                                cck_basic = rate;

                        continue;
                }

                /* This rate is not a basic rate so figure out the
                 * best basic rate less than this rate and fill in
                 * the hole in the table
                 */

                br[rate] = is_ofdm_rate(rate) ? ofdm_basic : cck_basic;

                if (br[rate] != 0)
                        continue;

                if (is_ofdm_rate(rate)) {
                        /*
                         * In 11g and 11a, the OFDM mandatory rates
                         * are 6, 12, and 24 Mbps
                         */
                        if (rate >= BRCM_RATE_24M)
                                mandatory = BRCM_RATE_24M;
                        else if (rate >= BRCM_RATE_12M)
                                mandatory = BRCM_RATE_12M;
                        else
                                mandatory = BRCM_RATE_6M;
                } else {
                        /* In 11b, all CCK rates are mandatory 1 - 11 Mbps */
                        mandatory = rate;
                }

                br[rate] = mandatory;
        }
}

static void brcms_c_bandinit_ordered(struct brcms_c_info *wlc,
                                     u16 chanspec)
{
        struct brcms_c_rateset default_rateset;
        uint parkband;
        uint i, band_order[2];

        /*
         * We might have been bandlocked during down and the chip
         * power-cycled (hibernate). Figure out the right band to park on
         */
        if (wlc->bandlocked || wlc->pub->_nbands == 1) {
                /* updated in brcms_c_bandlock() */
                parkband = wlc->band->bandunit;
                band_order[0] = band_order[1] = parkband;
        } else {
                /* park on the band of the specified chanspec */
                parkband = chspec_bandunit(chanspec);

                /* order so that parkband initialize last */
                band_order[0] = parkband ^ 1;
                band_order[1] = parkband;
        }

        /* make each band operational, software state init */
        for (i = 0; i < wlc->pub->_nbands; i++) {
                uint j = band_order[i];

                wlc->band = wlc->bandstate[j];

                brcms_default_rateset(wlc, &default_rateset);

                /* fill in hw_rate */
                brcms_c_rateset_filter(&default_rateset, &wlc->band->hw_rateset,
                                   false, BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK,
                                   (bool) (wlc->pub->_n_enab & SUPPORT_11N));

                /* init basic rate lookup */
                brcms_c_rate_lookup_init(wlc, &default_rateset);
        }

        /* sync up phy/radio chanspec */
        brcms_c_set_phy_chanspec(wlc, chanspec);
}

/*
 * Set or clear filtering related maccontrol bits based on
 * specified filter flags
 */
void brcms_c_mac_promisc(struct brcms_c_info *wlc, uint filter_flags)
{
        u32 promisc_bits = 0;

        wlc->filter_flags = filter_flags;

        if (filter_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS))
                promisc_bits |= MCTL_PROMISC;

        if (filter_flags & FIF_BCN_PRBRESP_PROMISC)
                promisc_bits |= MCTL_BCNS_PROMISC;

        if (filter_flags & FIF_FCSFAIL)
                promisc_bits |= MCTL_KEEPBADFCS;

        if (filter_flags & (FIF_CONTROL | FIF_PSPOLL))
                promisc_bits |= MCTL_KEEPCONTROL;

        brcms_b_mctrl(wlc->hw,
                MCTL_PROMISC | MCTL_BCNS_PROMISC |
                MCTL_KEEPCONTROL | MCTL_KEEPBADFCS,
                promisc_bits);
}

/*
 * ucode, hwmac update
 *    Channel dependent updates for ucode and hw
 */
static void brcms_c_ucode_mac_upd(struct brcms_c_info *wlc)
{
        /* enable or disable any active IBSSs depending on whether or not
         * we are on the home channel
         */
        if (wlc->home_chanspec == wlc_phy_chanspec_get(wlc->band->pi)) {
                if (wlc->pub->associated) {
                        /*
                         * BMAC_NOTE: This is something that should be fixed
                         * in ucode inits. I think that the ucode inits set
                         * up the bcn templates and shm values with a bogus
                         * beacon. This should not be done in the inits. If
                         * ucode needs to set up a beacon for testing, the
                         * test routines should write it down, not expect the
                         * inits to populate a bogus beacon.
                         */
                        if (BRCMS_PHY_11N_CAP(wlc->band))
                                brcms_b_write_shm(wlc->hw,
                                                M_BCN_TXTSF_OFFSET, 0);
                }
        } else {
                /* disable an active IBSS if we are not on the home channel */
        }
}

static void brcms_c_write_rate_shm(struct brcms_c_info *wlc, u8 rate,
                                   u8 basic_rate)
{
        u8 phy_rate, index;
        u8 basic_phy_rate, basic_index;
        u16 dir_table, basic_table;
        u16 basic_ptr;

        /* Shared memory address for the table we are reading */
        dir_table = is_ofdm_rate(basic_rate) ? M_RT_DIRMAP_A : M_RT_DIRMAP_B;

        /* Shared memory address for the table we are writing */
        basic_table = is_ofdm_rate(rate) ? M_RT_BBRSMAP_A : M_RT_BBRSMAP_B;

        /*
         * for a given rate, the LS-nibble of the PLCP SIGNAL field is
         * the index into the rate table.
         */
        phy_rate = rate_info[rate] & BRCMS_RATE_MASK;
        basic_phy_rate = rate_info[basic_rate] & BRCMS_RATE_MASK;
        index = phy_rate & 0xf;
        basic_index = basic_phy_rate & 0xf;

        /* Find the SHM pointer to the ACK rate entry by looking in the
         * Direct-map Table
         */
        basic_ptr = brcms_b_read_shm(wlc->hw, (dir_table + basic_index * 2));

        /* Update the SHM BSS-basic-rate-set mapping table with the pointer
         * to the correct basic rate for the given incoming rate
         */
        brcms_b_write_shm(wlc->hw, (basic_table + index * 2), basic_ptr);
}

static const struct brcms_c_rateset *
brcms_c_rateset_get_hwrs(struct brcms_c_info *wlc)
{
        const struct brcms_c_rateset *rs_dflt;

        if (BRCMS_PHY_11N_CAP(wlc->band)) {
                if (wlc->band->bandtype == BRCM_BAND_5G)
                        rs_dflt = &ofdm_mimo_rates;
                else
                        rs_dflt = &cck_ofdm_mimo_rates;
        } else if (wlc->band->gmode)
                rs_dflt = &cck_ofdm_rates;
        else
                rs_dflt = &cck_rates;

        return rs_dflt;
}

static void brcms_c_set_ratetable(struct brcms_c_info *wlc)
{
        const struct brcms_c_rateset *rs_dflt;
        struct brcms_c_rateset rs;
        u8 rate, basic_rate;
        uint i;

        rs_dflt = brcms_c_rateset_get_hwrs(wlc);

        brcms_c_rateset_copy(rs_dflt, &rs);
        brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams);

        /* walk the phy rate table and update SHM basic rate lookup table */
        for (i = 0; i < rs.count; i++) {
                rate = rs.rates[i] & BRCMS_RATE_MASK;

                /* for a given rate brcms_basic_rate returns the rate at
                 * which a response ACK/CTS should be sent.
                 */
                basic_rate = brcms_basic_rate(wlc, rate);
                if (basic_rate == 0)
                        /* This should only happen if we are using a
                         * restricted rateset.
                         */
                        basic_rate = rs.rates[0] & BRCMS_RATE_MASK;

                brcms_c_write_rate_shm(wlc, rate, basic_rate);
        }
}

/* band-specific init */
static void brcms_c_bsinit(struct brcms_c_info *wlc)
{
        brcms_dbg_info(wlc->hw->d11core, "wl%d: bandunit %d\n",
                       wlc->pub->unit, wlc->band->bandunit);

        /* write ucode ACK/CTS rate table */
        brcms_c_set_ratetable(wlc);

        /* update some band specific mac configuration */
        brcms_c_ucode_mac_upd(wlc);

        /* init antenna selection */
        brcms_c_antsel_init(wlc->asi);

}

/* formula:  IDLE_BUSY_RATIO_X_16 = (100-duty_cycle)/duty_cycle*16 */
static int
brcms_c_duty_cycle_set(struct brcms_c_info *wlc, int duty_cycle, bool isOFDM,
                   bool writeToShm)
{
        int idle_busy_ratio_x_16 = 0;
        uint offset =
            isOFDM ? M_TX_IDLE_BUSY_RATIO_X_16_OFDM :
            M_TX_IDLE_BUSY_RATIO_X_16_CCK;
        if (duty_cycle > 100 || duty_cycle < 0) {
                brcms_err(wlc->hw->d11core,
                          "wl%d:  duty cycle value off limit\n",
                          wlc->pub->unit);
                return -EINVAL;
        }
        if (duty_cycle)
                idle_busy_ratio_x_16 = (100 - duty_cycle) * 16 / duty_cycle;
        /* Only write to shared memory  when wl is up */
        if (writeToShm)
                brcms_b_write_shm(wlc->hw, offset, (u16) idle_busy_ratio_x_16);

        if (isOFDM)
                wlc->tx_duty_cycle_ofdm = (u16) duty_cycle;
        else
                wlc->tx_duty_cycle_cck = (u16) duty_cycle;

        return 0;
}

/* push sw hps and wake state through hardware */
static void brcms_c_set_ps_ctrl(struct brcms_c_info *wlc)
{
        u32 v1, v2;
        bool hps;
        bool awake_before;

        hps = brcms_c_ps_allowed(wlc);

        brcms_dbg_mac80211(wlc->hw->d11core, "wl%d: hps %d\n", wlc->pub->unit,
                           hps);

        v1 = bcma_read32(wlc->hw->d11core, D11REGOFFS(maccontrol));
        v2 = MCTL_WAKE;
        if (hps)
                v2 |= MCTL_HPS;

        brcms_b_mctrl(wlc->hw, MCTL_WAKE | MCTL_HPS, v2);

        awake_before = ((v1 & MCTL_WAKE) || ((v1 & MCTL_HPS) == 0));

        if (!awake_before)
                brcms_b_wait_for_wake(wlc->hw);
}

/*
 * Write this BSS config's MAC address to core.
 * Updates RXE match engine.
 */
static int brcms_c_set_mac(struct brcms_bss_cfg *bsscfg)
{
        int err = 0;
        struct brcms_c_info *wlc = bsscfg->wlc;

        /* enter the MAC addr into the RXE match registers */
        brcms_c_set_addrmatch(wlc, RCM_MAC_OFFSET, bsscfg->cur_etheraddr);

        brcms_c_ampdu_macaddr_upd(wlc);

        return err;
}

/* Write the BSS config's BSSID address to core (set_bssid in d11procs.tcl).
 * Updates RXE match engine.
 */
static void brcms_c_set_bssid(struct brcms_bss_cfg *bsscfg)
{
        /* we need to update BSSID in RXE match registers */
        brcms_c_set_addrmatch(bsscfg->wlc, RCM_BSSID_OFFSET, bsscfg->BSSID);
}

static void brcms_b_set_shortslot(struct brcms_hardware *wlc_hw, bool shortslot)
{
        wlc_hw->shortslot = shortslot;

        if (wlc_hw->band->bandtype == BRCM_BAND_2G && wlc_hw->up) {
                brcms_c_suspend_mac_and_wait(wlc_hw->wlc);
                brcms_b_update_slot_timing(wlc_hw, shortslot);
                brcms_c_enable_mac(wlc_hw->wlc);
        }
}

/*
 * Suspend the the MAC and update the slot timing
 * for standard 11b/g (20us slots) or shortslot 11g (9us slots).
 */
static void brcms_c_switch_shortslot(struct brcms_c_info *wlc, bool shortslot)
{
        /* use the override if it is set */
        if (wlc->shortslot_override != BRCMS_SHORTSLOT_AUTO)
                shortslot = (wlc->shortslot_override == BRCMS_SHORTSLOT_ON);

        if (wlc->shortslot == shortslot)
                return;

        wlc->shortslot = shortslot;

        brcms_b_set_shortslot(wlc->hw, shortslot);
}

static void brcms_c_set_home_chanspec(struct brcms_c_info *wlc, u16 chanspec)
{
        if (wlc->home_chanspec != chanspec) {
                wlc->home_chanspec = chanspec;

                if (wlc->bsscfg->associated)
                        wlc->bsscfg->current_bss->chanspec = chanspec;
        }
}

void
brcms_b_set_chanspec(struct brcms_hardware *wlc_hw, u16 chanspec,
                      bool mute_tx, struct txpwr_limits *txpwr)
{
        uint bandunit;

        brcms_dbg_mac80211(wlc_hw->d11core, "wl%d: 0x%x\n", wlc_hw->unit,
                           chanspec);

        wlc_hw->chanspec = chanspec;

        /* Switch bands if necessary */
        if (wlc_hw->_nbands > 1) {
                bandunit = chspec_bandunit(chanspec);
                if (wlc_hw->band->bandunit != bandunit) {
                        /* brcms_b_setband disables other bandunit,
                         *  use light band switch if not up yet
                         */
                        if (wlc_hw->up) {
                                wlc_phy_chanspec_radio_set(wlc_hw->
                                                           bandstate[bandunit]->
                                                           pi, chanspec);
                                brcms_b_setband(wlc_hw, bandunit, chanspec);
                        } else {
                                brcms_c_setxband(wlc_hw, bandunit);
                        }
                }
        }

        wlc_phy_initcal_enable(wlc_hw->band->pi, !mute_tx);

        if (!wlc_hw->up) {
                if (wlc_hw->clk)
                        wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr,
                                                  chanspec);
                wlc_phy_chanspec_radio_set(wlc_hw->band->pi, chanspec);
        } else {
                wlc_phy_chanspec_set(wlc_hw->band->pi, chanspec);
                wlc_phy_txpower_limit_set(wlc_hw->band->pi, txpwr, chanspec);

                /* Update muting of the channel */
                brcms_b_mute(wlc_hw, mute_tx);
        }
}

/* switch to and initialize new band */
static void brcms_c_setband(struct brcms_c_info *wlc,
                                           uint bandunit)
{
        wlc->band = wlc->bandstate[bandunit];

        if (!wlc->pub->up)
                return;

        /* wait for at least one beacon before entering sleeping state */
        brcms_c_set_ps_ctrl(wlc);

        /* band-specific initializations */
        brcms_c_bsinit(wlc);
}

static void brcms_c_set_chanspec(struct brcms_c_info *wlc, u16 chanspec)
{
        uint bandunit;
        bool switchband = false;
        u16 old_chanspec = wlc->chanspec;

        if (!brcms_c_valid_chanspec_db(wlc->cmi, chanspec)) {
                brcms_err(wlc->hw->d11core, "wl%d: %s: Bad channel %d\n",
                          wlc->pub->unit, __func__, CHSPEC_CHANNEL(chanspec));
                return;
        }

        /* Switch bands if necessary */
        if (wlc->pub->_nbands > 1) {
                bandunit = chspec_bandunit(chanspec);
                if (wlc->band->bandunit != bandunit || wlc->bandinit_pending) {
                        switchband = true;
                        if (wlc->bandlocked) {
                                brcms_err(wlc->hw->d11core,
                                          "wl%d: %s: chspec %d band is locked!\n",
                                          wlc->pub->unit, __func__,
                                          CHSPEC_CHANNEL(chanspec));
                                return;
                        }
                        /*
                         * should the setband call come after the
                         * brcms_b_chanspec() ? if the setband updates
                         * (brcms_c_bsinit) use low level calls to inspect and
                         * set state, the state inspected may be from the wrong
                         * band, or the following brcms_b_set_chanspec() may
                         * undo the work.
                         */
                        brcms_c_setband(wlc, bandunit);
                }
        }

        /* sync up phy/radio chanspec */
        brcms_c_set_phy_chanspec(wlc, chanspec);

        /* init antenna selection */
        if (brcms_chspec_bw(old_chanspec) != brcms_chspec_bw(chanspec)) {
                brcms_c_antsel_init(wlc->asi);

                /* Fix the hardware rateset based on bw.
                 * Mainly add MCS32 for 40Mhz, remove MCS 32 for 20Mhz
                 */
                brcms_c_rateset_bw_mcs_filter(&wlc->band->hw_rateset,
                        wlc->band->mimo_cap_40 ? brcms_chspec_bw(chanspec) : 0);
        }

        /* update some mac configuration since chanspec changed */
        brcms_c_ucode_mac_upd(wlc);
}

/*
 * This function changes the phytxctl for beacon based on current
 * beacon ratespec AND txant setting as per this table:
 *  ratespec     CCK            ant = wlc->stf->txant
 *              OFDM            ant = 3
 */
void brcms_c_beacon_phytxctl_txant_upd(struct brcms_c_info *wlc,
                                       u32 bcn_rspec)
{
        u16 phyctl;
        u16 phytxant = wlc->stf->phytxant;
        u16 mask = PHY_TXC_ANT_MASK;

        /* for non-siso rates or default setting, use the available chains */
        if (BRCMS_PHY_11N_CAP(wlc->band))
                phytxant = brcms_c_stf_phytxchain_sel(wlc, bcn_rspec);

        phyctl = brcms_b_read_shm(wlc->hw, M_BCN_PCTLWD);
        phyctl = (phyctl & ~mask) | phytxant;
        brcms_b_write_shm(wlc->hw, M_BCN_PCTLWD, phyctl);
}

/*
 * centralized protection config change function to simplify debugging, no
 * consistency checking this should be called only on changes to avoid overhead
 * in periodic function
 */
void brcms_c_protection_upd(struct brcms_c_info *wlc, uint idx, int val)
{
        /*
         * Cannot use brcms_dbg_* here because this function is called
         * before wlc is sufficiently initialized.
         */
        BCMMSG(wlc->wiphy, "idx %d, val %d\n", idx, val);

        switch (idx) {
        case BRCMS_PROT_G_SPEC:
                wlc->protection->_g = (bool) val;
                break;
        case BRCMS_PROT_G_OVR:
                wlc->protection->g_override = (s8) val;
                break;
        case BRCMS_PROT_G_USER:
                wlc->protection->gmode_user = (u8) val;
                break;
        case BRCMS_PROT_OVERLAP:
                wlc->protection->overlap = (s8) val;
                break;
        case BRCMS_PROT_N_USER:
                wlc->protection->nmode_user = (s8) val;
                break;
        case BRCMS_PROT_N_CFG:
                wlc->protection->n_cfg = (s8) val;
                break;
        case BRCMS_PROT_N_CFG_OVR:
                wlc->protection->n_cfg_override = (s8) val;
                break;
        case BRCMS_PROT_N_NONGF:
                wlc->protection->nongf = (bool) val;
                break;
        case BRCMS_PROT_N_NONGF_OVR:
                wlc->protection->nongf_override = (s8) val;
                break;
        case BRCMS_PROT_N_PAM_OVR:
                wlc->protection->n_pam_override = (s8) val;
                break;
        case BRCMS_PROT_N_OBSS:
                wlc->protection->n_obss = (bool) val;
                break;

        default:
                break;
        }

}

static void brcms_c_ht_update_sgi_rx(struct brcms_c_info *wlc, int val)
{
        if (wlc->pub->up) {
                brcms_c_update_beacon(wlc);
                brcms_c_update_probe_resp(wlc, true);
        }
}

static void brcms_c_ht_update_ldpc(struct brcms_c_info *wlc, s8 val)
{
        wlc->stf->ldpc = val;

        if (wlc->pub->up) {
                brcms_c_update_beacon(wlc);
                brcms_c_update_probe_resp(wlc, true);
                wlc_phy_ldpc_override_set(wlc->band->pi, (val ? true : false));
        }
}

void brcms_c_wme_setparams(struct brcms_c_info *wlc, u16 aci,
                       const struct ieee80211_tx_queue_params *params,
                       bool suspend)
{
        int i;
        struct shm_acparams acp_shm;
        u16 *shm_entry;

        /* Only apply params if the core is out of reset and has clocks */
        if (!wlc->clk) {
                brcms_err(wlc->hw->d11core, "wl%d: %s : no-clock\n",
                          wlc->pub->unit, __func__);
                return;
        }

        memset((char *)&acp_shm, 0, sizeof(struct shm_acparams));
        /* fill in shm ac params struct */
        acp_shm.txop = params->txop;
        /* convert from units of 32us to us for ucode */
        wlc->edcf_txop[aci & 0x3] = acp_shm.txop =
            EDCF_TXOP2USEC(acp_shm.txop);
        acp_shm.aifs = (params->aifs & EDCF_AIFSN_MASK);

        if (aci == IEEE80211_AC_VI && acp_shm.txop == 0
            && acp_shm.aifs < EDCF_AIFSN_MAX)
                acp_shm.aifs++;

        if (acp_shm.aifs < EDCF_AIFSN_MIN
            || acp_shm.aifs > EDCF_AIFSN_MAX) {
                brcms_err(wlc->hw->d11core, "wl%d: edcf_setparams: bad "
                          "aifs %d\n", wlc->pub->unit, acp_shm.aifs);
        } else {
                acp_shm.cwmin = params->cw_min;
                acp_shm.cwmax = params->cw_max;
                acp_shm.cwcur = acp_shm.cwmin;
                acp_shm.bslots =
                        bcma_read16(wlc->hw->d11core, D11REGOFFS(tsf_random)) &
                        acp_shm.cwcur;
                acp_shm.reggap = acp_shm.bslots + acp_shm.aifs;
                /* Indicate the new params to the ucode */
                acp_shm.status = brcms_b_read_shm(wlc->hw, (M_EDCF_QINFO +
                                                  wme_ac2fifo[aci] *
                                                  M_EDCF_QLEN +
                                                  M_EDCF_STATUS_OFF));
                acp_shm.status |= WME_STATUS_NEWAC;

                /* Fill in shm acparam table */
                shm_entry = (u16 *) &acp_shm;
                for (i = 0; i < (int)sizeof(struct shm_acparams); i += 2)
                        brcms_b_write_shm(wlc->hw,
                                          M_EDCF_QINFO +
                                          wme_ac2fifo[aci] * M_EDCF_QLEN + i,
                                          *shm_entry++);
        }

        if (suspend) {
                brcms_c_suspend_mac_and_wait(wlc);
                brcms_c_enable_mac(wlc);
        }
}

static void brcms_c_edcf_setparams(struct brcms_c_info *wlc, bool suspend)
{
        u16 aci;
        int i_ac;
        struct ieee80211_tx_queue_params txq_pars;
        static const struct edcf_acparam default_edcf_acparams[] = {
                 {EDCF_AC_BE_ACI_STA, EDCF_AC_BE_ECW_STA, EDCF_AC_BE_TXOP_STA},
                 {EDCF_AC_BK_ACI_STA, EDCF_AC_BK_ECW_STA, EDCF_AC_BK_TXOP_STA},
                 {EDCF_AC_VI_ACI_STA, EDCF_AC_VI_ECW_STA, EDCF_AC_VI_TXOP_STA},
                 {EDCF_AC_VO_ACI_STA, EDCF_AC_VO_ECW_STA, EDCF_AC_VO_TXOP_STA}
        }; /* ucode needs these parameters during its initialization */
        const struct edcf_acparam *edcf_acp = &default_edcf_acparams[0];

        for (i_ac = 0; i_ac < IEEE80211_NUM_ACS; i_ac++, edcf_acp++) {
                /* find out which ac this set of params applies to */
                aci = (edcf_acp->ACI & EDCF_ACI_MASK) >> EDCF_ACI_SHIFT;

                /* fill in shm ac params struct */
                txq_pars.txop = edcf_acp->TXOP;
                txq_pars.aifs = edcf_acp->ACI;

                /* CWmin = 2^(ECWmin) - 1 */
                txq_pars.cw_min = EDCF_ECW2CW(edcf_acp->ECW & EDCF_ECWMIN_MASK);
                /* CWmax = 2^(ECWmax) - 1 */
                txq_pars.cw_max = EDCF_ECW2CW((edcf_acp->ECW & EDCF_ECWMAX_MASK)
                                            >> EDCF_ECWMAX_SHIFT);
                brcms_c_wme_setparams(wlc, aci, &txq_pars, suspend);
        }

        if (suspend) {
                brcms_c_suspend_mac_and_wait(wlc);
                brcms_c_enable_mac(wlc);
        }
}

static void brcms_c_radio_monitor_start(struct brcms_c_info *wlc)
{
        /* Don't start the timer if HWRADIO feature is disabled */
        if (wlc->radio_monitor)
                return;

        wlc->radio_monitor = true;
        brcms_b_pllreq(wlc->hw, true, BRCMS_PLLREQ_RADIO_MON);
        brcms_add_timer(wlc->radio_timer, TIMER_INTERVAL_RADIOCHK, true);
}

static bool brcms_c_radio_monitor_stop(struct brcms_c_info *wlc)
{
        if (!wlc->radio_monitor)
                return true;

        wlc->radio_monitor = false;
        brcms_b_pllreq(wlc->hw, false, BRCMS_PLLREQ_RADIO_MON);
        return brcms_del_timer(wlc->radio_timer);
}

/* read hwdisable state and propagate to wlc flag */
static void brcms_c_radio_hwdisable_upd(struct brcms_c_info *wlc)
{
        if (wlc->pub->hw_off)
                return;

        if (brcms_b_radio_read_hwdisabled(wlc->hw))
                mboolset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE);
        else
                mboolclr(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE);
}

/* update hwradio status and return it */
bool brcms_c_check_radio_disabled(struct brcms_c_info *wlc)
{
        brcms_c_radio_hwdisable_upd(wlc);

        return mboolisset(wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE) ?
                        true : false;
}

/* periodical query hw radio button while driver is "down" */
static void brcms_c_radio_timer(void *arg)
{
        struct brcms_c_info *wlc = (struct brcms_c_info *) arg;

        if (brcms_deviceremoved(wlc)) {
                brcms_err(wlc->hw->d11core, "wl%d: %s: dead chip\n",
                          wlc->pub->unit, __func__);
                brcms_down(wlc->wl);
                return;
        }

        brcms_c_radio_hwdisable_upd(wlc);
}

/* common low-level watchdog code */
static void brcms_b_watchdog(struct brcms_c_info *wlc)
{
        struct brcms_hardware *wlc_hw = wlc->hw;

        if (!wlc_hw->up)
                return;

        /* increment second count */
        wlc_hw->now++;

        /* Check for FIFO error interrupts */
        brcms_b_fifoerrors(wlc_hw);

        /* make sure RX dma has buffers */
        dma_rxfill(wlc->hw->di[RX_FIFO]);

        wlc_phy_watchdog(wlc_hw->band->pi);
}

/* common watchdog code */
static void brcms_c_watchdog(struct brcms_c_info *wlc)
{
        brcms_dbg_info(wlc->hw->d11core, "wl%d\n", wlc->pub->unit);

        if (!wlc->pub->up)
                return;

        if (brcms_deviceremoved(wlc)) {
                brcms_err(wlc->hw->d11core, "wl%d: %s: dead chip\n",
                          wlc->pub->unit, __func__);
                brcms_down(wlc->wl);
                return;
        }

        /* increment second count */
        wlc->pub->now++;

        brcms_c_radio_hwdisable_upd(wlc);
        /* if radio is disable, driver may be down, quit here */
        if (wlc->pub->radio_disabled)
                return;

        brcms_b_watchdog(wlc);

        /*
         * occasionally sample mac stat counters to
         * detect 16-bit counter wrap
         */
        if ((wlc->pub->now % SW_TIMER_MAC_STAT_UPD) == 0)
                brcms_c_statsupd(wlc);

        if (BRCMS_ISNPHY(wlc->band) &&
            ((wlc->pub->now - wlc->tempsense_lasttime) >=
             BRCMS_TEMPSENSE_PERIOD)) {
                wlc->tempsense_lasttime = wlc->pub->now;
                brcms_c_tempsense_upd(wlc);
        }
}

static void brcms_c_watchdog_by_timer(void *arg)
{
        struct brcms_c_info *wlc = (struct brcms_c_info *) arg;

        brcms_c_watchdog(wlc);
}

static bool brcms_c_timers_init(struct brcms_c_info *wlc, int unit)
{
        wlc->wdtimer = brcms_init_timer(wlc->wl, brcms_c_watchdog_by_timer,
                wlc, "watchdog");
        if (!wlc->wdtimer) {
                wiphy_err(wlc->wiphy, "wl%d:  wl_init_timer for wdtimer "
                          "failed\n", unit);
                goto fail;
        }

        wlc->radio_timer = brcms_init_timer(wlc->wl, brcms_c_radio_timer,
                wlc, "radio");
        if (!wlc->radio_timer) {
                wiphy_err(wlc->wiphy, "wl%d:  wl_init_timer for radio_timer "
                          "failed\n", unit);
                goto fail;
        }

        return true;

 fail:
        return false;
}

/*
 * Initialize brcms_c_info default values ...
 * may get overrides later in this function
 */
static void brcms_c_info_init(struct brcms_c_info *wlc, int unit)
{
        int i;

        /* Save our copy of the chanspec */
        wlc->chanspec = ch20mhz_chspec(1);

        /* various 802.11g modes */
        wlc->shortslot = false;
        wlc->shortslot_override = BRCMS_SHORTSLOT_AUTO;

        brcms_c_protection_upd(wlc, BRCMS_PROT_G_OVR, BRCMS_PROTECTION_AUTO);
        brcms_c_protection_upd(wlc, BRCMS_PROT_G_SPEC, false);

        brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG_OVR,
                               BRCMS_PROTECTION_AUTO);
        brcms_c_protection_upd(wlc, BRCMS_PROT_N_CFG, BRCMS_N_PROTECTION_OFF);
        brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF_OVR,
                               BRCMS_PROTECTION_AUTO);
        brcms_c_protection_upd(wlc, BRCMS_PROT_N_NONGF, false);
        brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, AUTO);

        brcms_c_protection_upd(wlc, BRCMS_PROT_OVERLAP,
                               BRCMS_PROTECTION_CTL_OVERLAP);

        /* 802.11g draft 4.0 NonERP elt advertisement */
        wlc->include_legacy_erp = true;

        wlc->stf->ant_rx_ovr = ANT_RX_DIV_DEF;
        wlc->stf->txant = ANT_TX_DEF;

        wlc->prb_resp_timeout = BRCMS_PRB_RESP_TIMEOUT;

        wlc->usr_fragthresh = DOT11_DEFAULT_FRAG_LEN;
        for (i = 0; i < NFIFO; i++)
                wlc->fragthresh[i] = DOT11_DEFAULT_FRAG_LEN;
        wlc->RTSThresh = DOT11_DEFAULT_RTS_LEN;

        /* default rate fallback retry limits */
        wlc->SFBL = RETRY_SHORT_FB;
        wlc->LFBL = RETRY_LONG_FB;

        /* default mac retry limits */
        wlc->SRL = RETRY_SHORT_DEF;
        wlc->LRL = RETRY_LONG_DEF;

        /* WME QoS mode is Auto by default */
        wlc->pub->_ampdu = AMPDU_AGG_HOST;
        wlc->pub->bcmerror = 0;
}

static uint brcms_c_attach_module(struct brcms_c_info *wlc)
{
        uint err = 0;
        uint unit;
        unit = wlc->pub->unit;

        wlc->asi = brcms_c_antsel_attach(wlc);
        if (wlc->asi == NULL) {
                wiphy_err(wlc->wiphy, "wl%d: attach: antsel_attach "
                          "failed\n", unit);
                err = 44;
                goto fail;
        }

        wlc->ampdu = brcms_c_ampdu_attach(wlc);
        if (wlc->ampdu == NULL) {
                wiphy_err(wlc->wiphy, "wl%d: attach: ampdu_attach "
                          "failed\n", unit);
                err = 50;
                goto fail;
        }

        if ((brcms_c_stf_attach(wlc) != 0)) {
                wiphy_err(wlc->wiphy, "wl%d: attach: stf_attach "
                          "failed\n", unit);
                err = 68;
                goto fail;
        }
 fail:
        return err;
}

struct brcms_pub *brcms_c_pub(struct brcms_c_info *wlc)
{
        return wlc->pub;
}

/* low level attach
 *    run backplane attach, init nvram
 *    run phy attach
 *    initialize software state for each core and band
 *    put the whole chip in reset(driver down state), no clock
 */
static int brcms_b_attach(struct brcms_c_info *wlc, struct bcma_device *core,
                          uint unit, bool piomode)
{
        struct brcms_hardware *wlc_hw;
        uint err = 0;
        uint j;
        bool wme = false;
        struct shared_phy_params sha_params;
        struct wiphy *wiphy = wlc->wiphy;
        struct pci_dev *pcidev = core->bus->host_pci;
        struct ssb_sprom *sprom = &core->bus->sprom;

        if (core->bus->hosttype == BCMA_HOSTTYPE_PCI)
                brcms_dbg_info(core, "wl%d: vendor 0x%x device 0x%x\n", unit,
                               pcidev->vendor,
                               pcidev->device);
        else
                brcms_dbg_info(core, "wl%d: vendor 0x%x device 0x%x\n", unit,
                               core->bus->boardinfo.vendor,
                               core->bus->boardinfo.type);

        wme = true;

        wlc_hw = wlc->hw;
        wlc_hw->wlc = wlc;
        wlc_hw->unit = unit;
        wlc_hw->band = wlc_hw->bandstate[0];
        wlc_hw->_piomode = piomode;

        /* populate struct brcms_hardware with default values  */
        brcms_b_info_init(wlc_hw);

        /*
         * Do the hardware portion of the attach. Also initialize software
         * state that depends on the particular hardware we are running.
         */
        wlc_hw->sih = ai_attach(core->bus);
        if (wlc_hw->sih == NULL) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: si_attach failed\n",
                          unit);
                err = 11;
                goto fail;
        }

        /* verify again the device is supported */
        if (!brcms_c_chipmatch(core)) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported device\n",
                         unit);
                err = 12;
                goto fail;
        }

        if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
                wlc_hw->vendorid = pcidev->vendor;
                wlc_hw->deviceid = pcidev->device;
        } else {
                wlc_hw->vendorid = core->bus->boardinfo.vendor;
                wlc_hw->deviceid = core->bus->boardinfo.type;
        }

        wlc_hw->d11core = core;
        wlc_hw->corerev = core->id.rev;

        /* validate chip, chiprev and corerev */
        if (!brcms_c_isgoodchip(wlc_hw)) {
                err = 13;
                goto fail;
        }

        /* initialize power control registers */
        ai_clkctl_init(wlc_hw->sih);

        /* request fastclock and force fastclock for the rest of attach
         * bring the d11 core out of reset.
         *   For PMU chips, the first wlc_clkctl_clk is no-op since core-clk
         *   is still false; But it will be called again inside wlc_corereset,
         *   after d11 is out of reset.
         */
        brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);
        brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

        if (!brcms_b_validate_chip_access(wlc_hw)) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: validate_chip_access "
                        "failed\n", unit);
                err = 14;
                goto fail;
        }

        /* get the board rev, used just below */
        j = sprom->board_rev;
        /* promote srom boardrev of 0xFF to 1 */
        if (j == BOARDREV_PROMOTABLE)
                j = BOARDREV_PROMOTED;
        wlc_hw->boardrev = (u16) j;
        if (!brcms_c_validboardtype(wlc_hw)) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: Unsupported Broadcom "
                          "board type (0x%x)" " or revision level (0x%x)\n",
                          unit, ai_get_boardtype(wlc_hw->sih),
                          wlc_hw->boardrev);
                err = 15;
                goto fail;
        }
        wlc_hw->sromrev = sprom->revision;
        wlc_hw->boardflags = sprom->boardflags_lo + (sprom->boardflags_hi << 16);
        wlc_hw->boardflags2 = sprom->boardflags2_lo + (sprom->boardflags2_hi << 16);

        if (wlc_hw->boardflags & BFL_NOPLLDOWN)
                brcms_b_pllreq(wlc_hw, true, BRCMS_PLLREQ_SHARED);

        /* check device id(srom, nvram etc.) to set bands */
        if (wlc_hw->deviceid == BCM43224_D11N_ID ||
            wlc_hw->deviceid == BCM43224_D11N_ID_VEN1 ||
            wlc_hw->deviceid == BCM43224_CHIP_ID)
                /* Dualband boards */
                wlc_hw->_nbands = 2;
        else
                wlc_hw->_nbands = 1;

        if ((ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM43225))
                wlc_hw->_nbands = 1;

        /* BMAC_NOTE: remove init of pub values when brcms_c_attach()
         * unconditionally does the init of these values
         */
        wlc->vendorid = wlc_hw->vendorid;
        wlc->deviceid = wlc_hw->deviceid;
        wlc->pub->sih = wlc_hw->sih;
        wlc->pub->corerev = wlc_hw->corerev;
        wlc->pub->sromrev = wlc_hw->sromrev;
        wlc->pub->boardrev = wlc_hw->boardrev;
        wlc->pub->boardflags = wlc_hw->boardflags;
        wlc->pub->boardflags2 = wlc_hw->boardflags2;
        wlc->pub->_nbands = wlc_hw->_nbands;

        wlc_hw->physhim = wlc_phy_shim_attach(wlc_hw, wlc->wl, wlc);

        if (wlc_hw->physhim == NULL) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_shim_attach "
                        "failed\n", unit);
                err = 25;
                goto fail;
        }

        /* pass all the parameters to wlc_phy_shared_attach in one struct */
        sha_params.sih = wlc_hw->sih;
        sha_params.physhim = wlc_hw->physhim;
        sha_params.unit = unit;
        sha_params.corerev = wlc_hw->corerev;
        sha_params.vid = wlc_hw->vendorid;
        sha_params.did = wlc_hw->deviceid;
        sha_params.chip = ai_get_chip_id(wlc_hw->sih);
        sha_params.chiprev = ai_get_chiprev(wlc_hw->sih);
        sha_params.chippkg = ai_get_chippkg(wlc_hw->sih);
        sha_params.sromrev = wlc_hw->sromrev;
        sha_params.boardtype = ai_get_boardtype(wlc_hw->sih);
        sha_params.boardrev = wlc_hw->boardrev;
        sha_params.boardflags = wlc_hw->boardflags;
        sha_params.boardflags2 = wlc_hw->boardflags2;

        /* alloc and save pointer to shared phy state area */
        wlc_hw->phy_sh = wlc_phy_shared_attach(&sha_params);
        if (!wlc_hw->phy_sh) {
                err = 16;
                goto fail;
        }

        /* initialize software state for each core and band */
        for (j = 0; j < wlc_hw->_nbands; j++) {
                /*
                 * band0 is always 2.4Ghz
                 * band1, if present, is 5Ghz
                 */

                brcms_c_setxband(wlc_hw, j);

                wlc_hw->band->bandunit = j;
                wlc_hw->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G;
                wlc->band->bandunit = j;
                wlc->band->bandtype = j ? BRCM_BAND_5G : BRCM_BAND_2G;
                wlc->core->coreidx = core->core_index;

                wlc_hw->machwcap = bcma_read32(core, D11REGOFFS(machwcap));
                wlc_hw->machwcap_backup = wlc_hw->machwcap;

                /* init tx fifo size */
                WARN_ON((wlc_hw->corerev - XMTFIFOTBL_STARTREV) < 0 ||
                        (wlc_hw->corerev - XMTFIFOTBL_STARTREV) >
                                ARRAY_SIZE(xmtfifo_sz));
                wlc_hw->xmtfifo_sz =
                    xmtfifo_sz[(wlc_hw->corerev - XMTFIFOTBL_STARTREV)];
                WARN_ON(!wlc_hw->xmtfifo_sz[0]);

                /* Get a phy for this band */
                wlc_hw->band->pi =
                        wlc_phy_attach(wlc_hw->phy_sh, core,
                                       wlc_hw->band->bandtype,
                                       wlc->wiphy);
                if (wlc_hw->band->pi == NULL) {
                        wiphy_err(wiphy, "wl%d: brcms_b_attach: wlc_phy_"
                                  "attach failed\n", unit);
                        err = 17;
                        goto fail;
                }

                wlc_phy_machwcap_set(wlc_hw->band->pi, wlc_hw->machwcap);

                wlc_phy_get_phyversion(wlc_hw->band->pi, &wlc_hw->band->phytype,
                                       &wlc_hw->band->phyrev,
                                       &wlc_hw->band->radioid,
                                       &wlc_hw->band->radiorev);
                wlc_hw->band->abgphy_encore =
                    wlc_phy_get_encore(wlc_hw->band->pi);
                wlc->band->abgphy_encore = wlc_phy_get_encore(wlc_hw->band->pi);
                wlc_hw->band->core_flags =
                    wlc_phy_get_coreflags(wlc_hw->band->pi);

                /* verify good phy_type & supported phy revision */
                if (BRCMS_ISNPHY(wlc_hw->band)) {
                        if (NCONF_HAS(wlc_hw->band->phyrev))
                                goto good_phy;
                        else
                                goto bad_phy;
                } else if (BRCMS_ISLCNPHY(wlc_hw->band)) {
                        if (LCNCONF_HAS(wlc_hw->band->phyrev))
                                goto good_phy;
                        else
                                goto bad_phy;
                } else {
 bad_phy:
                        wiphy_err(wiphy, "wl%d: brcms_b_attach: unsupported "
                                  "phy type/rev (%d/%d)\n", unit,
                                  wlc_hw->band->phytype, wlc_hw->band->phyrev);
                        err = 18;
                        goto fail;
                }

 good_phy:
                /*
                 * BMAC_NOTE: wlc->band->pi should not be set below and should
                 * be done in the high level attach. However we can not make
                 * that change until all low level access is changed to
                 * wlc_hw->band->pi. Instead do the wlc->band->pi init below,
                 * keeping wlc_hw->band->pi as well for incremental update of
                 * low level fns, and cut over low only init when all fns
                 * updated.
                 */
                wlc->band->pi = wlc_hw->band->pi;
                wlc->band->phytype = wlc_hw->band->phytype;
                wlc->band->phyrev = wlc_hw->band->phyrev;
                wlc->band->radioid = wlc_hw->band->radioid;
                wlc->band->radiorev = wlc_hw->band->radiorev;

                /* default contention windows size limits */
                wlc_hw->band->CWmin = APHY_CWMIN;
                wlc_hw->band->CWmax = PHY_CWMAX;

                if (!brcms_b_attach_dmapio(wlc, j, wme)) {
                        err = 19;
                        goto fail;
                }
        }

        /* disable core to match driver "down" state */
        brcms_c_coredisable(wlc_hw);

        /* Match driver "down" state */
        ai_pci_down(wlc_hw->sih);

        /* turn off pll and xtal to match driver "down" state */
        brcms_b_xtal(wlc_hw, OFF);

        /* *******************************************************************
         * The hardware is in the DOWN state at this point. D11 core
         * or cores are in reset with clocks off, and the board PLLs
         * are off if possible.
         *
         * Beyond this point, wlc->sbclk == false and chip registers
         * should not be touched.
         *********************************************************************
         */

        /* init etheraddr state variables */
        brcms_c_get_macaddr(wlc_hw, wlc_hw->etheraddr);

        if (is_broadcast_ether_addr(wlc_hw->etheraddr) ||
            is_zero_ether_addr(wlc_hw->etheraddr)) {
                wiphy_err(wiphy, "wl%d: brcms_b_attach: bad macaddr\n",
                          unit);
                err = 22;
                goto fail;
        }

        brcms_dbg_info(wlc_hw->d11core, "deviceid 0x%x nbands %d board 0x%x\n",
                       wlc_hw->deviceid, wlc_hw->_nbands,
                       ai_get_boardtype(wlc_hw->sih));

        return err;

 fail:
        wiphy_err(wiphy, "wl%d: brcms_b_attach: failed with err %d\n", unit,
                  err);
        return err;
}

static void brcms_c_attach_antgain_init(struct brcms_c_info *wlc)
{
        uint unit;
        unit = wlc->pub->unit;

        if ((wlc->band->antgain == -1) && (wlc->pub->sromrev == 1)) {
                /* default antenna gain for srom rev 1 is 2 dBm (8 qdbm) */
                wlc->band->antgain = 8;
        } else if (wlc->band->antgain == -1) {
                wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in"
                          " srom, using 2dB\n", unit, __func__);
                wlc->band->antgain = 8;
        } else {
                s8 gain, fract;
                /* Older sroms specified gain in whole dbm only.  In order
                 * be able to specify qdbm granularity and remain backward
                 * compatible the whole dbms are now encoded in only
                 * low 6 bits and remaining qdbms are encoded in the hi 2 bits.
                 * 6 bit signed number ranges from -32 - 31.
                 *
                 * Examples:
                 * 0x1 = 1 db,
                 * 0xc1 = 1.75 db (1 + 3 quarters),
                 * 0x3f = -1 (-1 + 0 quarters),
                 * 0x7f = -.75 (-1 + 1 quarters) = -3 qdbm.
                 * 0xbf = -.50 (-1 + 2 quarters) = -2 qdbm.
                 */
                gain = wlc->band->antgain & 0x3f;
                gain <<= 2;     /* Sign extend */
                gain >>= 2;
                fract = (wlc->band->antgain & 0xc0) >> 6;
                wlc->band->antgain = 4 * gain + fract;
        }
}

static bool brcms_c_attach_stf_ant_init(struct brcms_c_info *wlc)
{
        int aa;
        uint unit;
        int bandtype;
        struct ssb_sprom *sprom = &wlc->hw->d11core->bus->sprom;

        unit = wlc->pub->unit;
        bandtype = wlc->band->bandtype;

        /* get antennas available */
        if (bandtype == BRCM_BAND_5G)
                aa = sprom->ant_available_a;
        else
                aa = sprom->ant_available_bg;

        if ((aa < 1) || (aa > 15)) {
                wiphy_err(wlc->wiphy, "wl%d: %s: Invalid antennas available in"
                          " srom (0x%x), using 3\n", unit, __func__, aa);
                aa = 3;
        }

        /* reset the defaults if we have a single antenna */
        if (aa == 1) {
                wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_0;
                wlc->stf->txant = ANT_TX_FORCE_0;
        } else if (aa == 2) {
                wlc->stf->ant_rx_ovr = ANT_RX_DIV_FORCE_1;
                wlc->stf->txant = ANT_TX_FORCE_1;
        } else {
        }

        /* Compute Antenna Gain */
        if (bandtype == BRCM_BAND_5G)
                wlc->band->antgain = sprom->antenna_gain.a1;
        else
                wlc->band->antgain = sprom->antenna_gain.a0;

        brcms_c_attach_antgain_init(wlc);

        return true;
}

static void brcms_c_bss_default_init(struct brcms_c_info *wlc)
{
        u16 chanspec;
        struct brcms_band *band;
        struct brcms_bss_info *bi = wlc->default_bss;

        /* init default and target BSS with some sane initial values */
        memset((char *)(bi), 0, sizeof(struct brcms_bss_info));
        bi->beacon_period = BEACON_INTERVAL_DEFAULT;

        /* fill the default channel as the first valid channel
         * starting from the 2G channels
         */
        chanspec = ch20mhz_chspec(1);
        wlc->home_chanspec = bi->chanspec = chanspec;

        /* find the band of our default channel */
        band = wlc->band;
        if (wlc->pub->_nbands > 1 &&
            band->bandunit != chspec_bandunit(chanspec))
                band = wlc->bandstate[OTHERBANDUNIT(wlc)];

        /* init bss rates to the band specific default rate set */
        brcms_c_rateset_default(&bi->rateset, NULL, band->phytype,
                band->bandtype, false, BRCMS_RATE_MASK_FULL,
                (bool) (wlc->pub->_n_enab & SUPPORT_11N),
                brcms_chspec_bw(chanspec), wlc->stf->txstreams);

        if (wlc->pub->_n_enab & SUPPORT_11N)
                bi->flags |= BRCMS_BSS_HT;
}

static void brcms_c_update_mimo_band_bwcap(struct brcms_c_info *wlc, u8 bwcap)
{
        uint i;
        struct brcms_band *band;

        for (i = 0; i < wlc->pub->_nbands; i++) {
                band = wlc->bandstate[i];
                if (band->bandtype == BRCM_BAND_5G) {
                        if ((bwcap == BRCMS_N_BW_40ALL)
                            || (bwcap == BRCMS_N_BW_20IN2G_40IN5G))
                                band->mimo_cap_40 = true;
                        else
                                band->mimo_cap_40 = false;
                } else {
                        if (bwcap == BRCMS_N_BW_40ALL)
                                band->mimo_cap_40 = true;
                        else
                                band->mimo_cap_40 = false;
                }
        }
}

static void brcms_c_timers_deinit(struct brcms_c_info *wlc)
{
        /* free timer state */
        if (wlc->wdtimer) {
                brcms_free_timer(wlc->wdtimer);
                wlc->wdtimer = NULL;
        }
        if (wlc->radio_timer) {
                brcms_free_timer(wlc->radio_timer);
                wlc->radio_timer = NULL;
        }
}

static void brcms_c_detach_module(struct brcms_c_info *wlc)
{
        if (wlc->asi) {
                brcms_c_antsel_detach(wlc->asi);
                wlc->asi = NULL;
        }

        if (wlc->ampdu) {
                brcms_c_ampdu_detach(wlc->ampdu);
                wlc->ampdu = NULL;
        }

        brcms_c_stf_detach(wlc);
}

/*
 * low level detach
 */
static int brcms_b_detach(struct brcms_c_info *wlc)
{
        uint i;
        struct brcms_hw_band *band;
        struct brcms_hardware *wlc_hw = wlc->hw;
        int callbacks;

        callbacks = 0;

        brcms_b_detach_dmapio(wlc_hw);

        band = wlc_hw->band;
        for (i = 0; i < wlc_hw->_nbands; i++) {
                if (band->pi) {
                        /* Detach this band's phy */
                        wlc_phy_detach(band->pi);
                        band->pi = NULL;
                }
                band = wlc_hw->bandstate[OTHERBANDUNIT(wlc)];
        }

        /* Free shared phy state */
        kfree(wlc_hw->phy_sh);

        wlc_phy_shim_detach(wlc_hw->physhim);

        if (wlc_hw->sih) {
                ai_detach(wlc_hw->sih);
                wlc_hw->sih = NULL;
        }

        return callbacks;

}

/*
 * Return a count of the number of driver callbacks still pending.
 *
 * General policy is that brcms_c_detach can only dealloc/free software states.
 * It can NOT touch hardware registers since the d11core may be in reset and
 * clock may not be available.
 * One exception is sb register access, which is possible if crystal is turned
 * on after "down" state, driver should avoid software timer with the exception
 * of radio_monitor.
 */
uint brcms_c_detach(struct brcms_c_info *wlc)
{
        uint callbacks = 0;

        if (wlc == NULL)
                return 0;

        callbacks += brcms_b_detach(wlc);

        /* delete software timers */
        if (!brcms_c_radio_monitor_stop(wlc))
                callbacks++;

        brcms_c_channel_mgr_detach(wlc->cmi);

        brcms_c_timers_deinit(wlc);

        brcms_c_detach_module(wlc);

        brcms_c_detach_mfree(wlc);
        return callbacks;
}

/* update state that depends on the current value of "ap" */
static void brcms_c_ap_upd(struct brcms_c_info *wlc)
{
        /* STA-BSS; short capable */
        wlc->PLCPHdr_override = BRCMS_PLCP_SHORT;
}

/* Initialize just the hardware when coming out of POR or S3/S5 system states */
static void brcms_b_hw_up(struct brcms_hardware *wlc_hw)
{
        if (wlc_hw->wlc->pub->hw_up)
                return;

        brcms_dbg_info(wlc_hw->d11core, "wl%d\n", wlc_hw->unit);

        /*
         * Enable pll and xtal, initialize the power control registers,
         * and force fastclock for the remainder of brcms_c_up().
         */
        brcms_b_xtal(wlc_hw, ON);
        ai_clkctl_init(wlc_hw->sih);
        brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        /*
         * TODO: test suspend/resume
         *
         * AI chip doesn't restore bar0win2 on
         * hibernation/resume, need sw fixup
         */

        /*
         * Inform phy that a POR reset has occurred so
         * it does a complete phy init
         */
        wlc_phy_por_inform(wlc_hw->band->pi);

        wlc_hw->ucode_loaded = false;
        wlc_hw->wlc->pub->hw_up = true;

        if ((wlc_hw->boardflags & BFL_FEM)
            && (ai_get_chip_id(wlc_hw->sih) == BCMA_CHIP_ID_BCM4313)) {
                if (!
                    (wlc_hw->boardrev >= 0x1250
                     && (wlc_hw->boardflags & BFL_FEM_BT)))
                        ai_epa_4313war(wlc_hw->sih);
        }
}

static int brcms_b_up_prep(struct brcms_hardware *wlc_hw)
{
        brcms_dbg_info(wlc_hw->d11core, "wl%d\n", wlc_hw->unit);

        /*
         * Enable pll and xtal, initialize the power control registers,
         * and force fastclock for the remainder of brcms_c_up().
         */
        brcms_b_xtal(wlc_hw, ON);
        ai_clkctl_init(wlc_hw->sih);
        brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);

        /*
         * Configure pci/pcmcia here instead of in brcms_c_attach()
         * to allow mfg hotswap:  down, hotswap (chip power cycle), up.
         */
        bcma_core_pci_irq_ctl(&wlc_hw->d11core->bus->drv_pci[0], wlc_hw->d11core,
                              true);

        /*
         * Need to read the hwradio status here to cover the case where the
         * system is loaded with the hw radio disabled. We do not want to
         * bring the driver up in this case.
         */
        if (brcms_b_radio_read_hwdisabled(wlc_hw)) {
                /* put SB PCI in down state again */
                ai_pci_down(wlc_hw->sih);
                brcms_b_xtal(wlc_hw, OFF);
                return -ENOMEDIUM;
        }

        ai_pci_up(wlc_hw->sih);

        /* reset the d11 core */
        brcms_b_corereset(wlc_hw, BRCMS_USE_COREFLAGS);

        return 0;
}

static int brcms_b_up_finish(struct brcms_hardware *wlc_hw)
{
        wlc_hw->up = true;
        wlc_phy_hw_state_upd(wlc_hw->band->pi, true);

        /* FULLY enable dynamic power control and d11 core interrupt */
        brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_DYNAMIC);
        brcms_intrson(wlc_hw->wlc->wl);
        return 0;
}

/*
 * Write WME tunable parameters for retransmit/max rate
 * from wlc struct to ucode
 */
static void brcms_c_wme_retries_write(struct brcms_c_info *wlc)
{
        int ac;

        /* Need clock to do this */
        if (!wlc->clk)
                return;

        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
                brcms_b_write_shm(wlc->hw, M_AC_TXLMT_ADDR(ac),
                                  wlc->wme_retries[ac]);
}

/* make interface operational */
int brcms_c_up(struct brcms_c_info *wlc)
{
        struct ieee80211_channel *ch;

        brcms_dbg_info(wlc->hw->d11core, "wl%d\n", wlc->pub->unit);

        /* HW is turned off so don't try to access it */
        if (wlc->pub->hw_off || brcms_deviceremoved(wlc))
                return -ENOMEDIUM;

        if (!wlc->pub->hw_up) {
                brcms_b_hw_up(wlc->hw);
                wlc->pub->hw_up = true;
        }

        if ((wlc->pub->boardflags & BFL_FEM)
            && (ai_get_chip_id(wlc->hw->sih) == BCMA_CHIP_ID_BCM4313)) {
                if (wlc->pub->boardrev >= 0x1250
                    && (wlc->pub->boardflags & BFL_FEM_BT))
                        brcms_b_mhf(wlc->hw, MHF5, MHF5_4313_GPIOCTRL,
                                MHF5_4313_GPIOCTRL, BRCM_BAND_ALL);
                else
                        brcms_b_mhf(wlc->hw, MHF4, MHF4_EXTPA_ENABLE,
                                    MHF4_EXTPA_ENABLE, BRCM_BAND_ALL);
        }

        /*
         * Need to read the hwradio status here to cover the case where the
         * system is loaded with the hw radio disabled. We do not want to bring
         * the driver up in this case. If radio is disabled, abort up, lower
         * power, start radio timer and return 0(for NDIS) don't call
         * radio_update to avoid looping brcms_c_up.
         *
         * brcms_b_up_prep() returns either 0 or -BCME_RADIOOFF only
         */
        if (!wlc->pub->radio_disabled) {
                int status = brcms_b_up_prep(wlc->hw);
                if (status == -ENOMEDIUM) {
                        if (!mboolisset
                            (wlc->pub->radio_disabled, WL_RADIO_HW_DISABLE)) {
                                struct brcms_bss_cfg *bsscfg = wlc->bsscfg;
                                mboolset(wlc->pub->radio_disabled,
                                         WL_RADIO_HW_DISABLE);

                                if (bsscfg->enable && bsscfg->BSS)
                                        brcms_err(wlc->hw->d11core,
                                                  "wl%d: up: rfdisable -> "
                                                  "bsscfg_disable()\n",
                                                   wlc->pub->unit);
                        }
                }
        }

        if (wlc->pub->radio_disabled) {
                brcms_c_radio_monitor_start(wlc);
                return 0;
        }

        /* brcms_b_up_prep has done brcms_c_corereset(). so clk is on, set it */
        wlc->clk = true;

        brcms_c_radio_monitor_stop(wlc);

        /* Set EDCF hostflags */
        brcms_b_mhf(wlc->hw, MHF1, MHF1_EDCF, MHF1_EDCF, BRCM_BAND_ALL);

        brcms_init(wlc->wl);
        wlc->pub->up = true;

        if (wlc->bandinit_pending) {
                ch = wlc->pub->ieee_hw->conf.channel;
                brcms_c_suspend_mac_and_wait(wlc);
                brcms_c_set_chanspec(wlc, ch20mhz_chspec(ch->hw_value));
                wlc->bandinit_pending = false;
                brcms_c_enable_mac(wlc);
        }

        brcms_b_up_finish(wlc->hw);

        /* Program the TX wme params with the current settings */
        brcms_c_wme_retries_write(wlc);

        /* start one second watchdog timer */
        brcms_add_timer(wlc->wdtimer, TIMER_INTERVAL_WATCHDOG, true);
        wlc->WDarmed = true;

        /* ensure antenna config is up to date */
        brcms_c_stf_phy_txant_upd(wlc);
        /* ensure LDPC config is in sync */
        brcms_c_ht_update_ldpc(wlc, wlc->stf->ldpc);

        return 0;
}

static uint brcms_c_down_del_timer(struct brcms_c_info *wlc)
{
        uint callbacks = 0;

        return callbacks;
}

static int brcms_b_bmac_down_prep(struct brcms_hardware *wlc_hw)
{
        bool dev_gone;
        uint callbacks = 0;

        if (!wlc_hw->up)
                return callbacks;

        dev_gone = brcms_deviceremoved(wlc_hw->wlc);

        /* disable interrupts */
        if (dev_gone)
                wlc_hw->wlc->macintmask = 0;
        else {
                /* now disable interrupts */
                brcms_intrsoff(wlc_hw->wlc->wl);

                /* ensure we're running on the pll clock again */
                brcms_b_clkctl_clk(wlc_hw, BCMA_CLKMODE_FAST);
        }
        /* down phy at the last of this stage */
        callbacks += wlc_phy_down(wlc_hw->band->pi);

        return callbacks;
}

static int brcms_b_down_finish(struct brcms_hardware *wlc_hw)
{
        uint callbacks = 0;
        bool dev_gone;

        if (!wlc_hw->up)
                return callbacks;

        wlc_hw->up = false;
        wlc_phy_hw_state_upd(wlc_hw->band->pi, false);

        dev_gone = brcms_deviceremoved(wlc_hw->wlc);

        if (dev_gone) {
                wlc_hw->sbclk = false;
                wlc_hw->clk = false;
                wlc_phy_hw_clk_state_upd(wlc_hw->band->pi, false);

                /* reclaim any posted packets */
                brcms_c_flushqueues(wlc_hw->wlc);
        } else {

                /* Reset and disable the core */
                if (bcma_core_is_enabled(wlc_hw->d11core)) {
                        if (bcma_read32(wlc_hw->d11core,
                                        D11REGOFFS(maccontrol)) & MCTL_EN_MAC)
                                brcms_c_suspend_mac_and_wait(wlc_hw->wlc);
                        callbacks += brcms_reset(wlc_hw->wlc->wl);
                        brcms_c_coredisable(wlc_hw);
                }

                /* turn off primary xtal and pll */
                if (!wlc_hw->noreset) {
                        ai_pci_down(wlc_hw->sih);
                        brcms_b_xtal(wlc_hw, OFF);
                }
        }

        return callbacks;
}

/*
 * Mark the interface nonoperational, stop the software mechanisms,
 * disable the hardware, free any transient buffer state.
 * Return a count of the number of driver callbacks still pending.
 */
uint brcms_c_down(struct brcms_c_info *wlc)
{

        uint callbacks = 0;
        int i;
        bool dev_gone = false;

        brcms_dbg_info(wlc->hw->d11core, "wl%d\n", wlc->pub->unit);

        /* check if we are already in the going down path */
        if (wlc->going_down) {
                brcms_err(wlc->hw->d11core,
                          "wl%d: %s: Driver going down so return\n",
                          wlc->pub->unit, __func__);
                return 0;
        }
        if (!wlc->pub->up)
                return callbacks;

        wlc->going_down = true;

        callbacks += brcms_b_bmac_down_prep(wlc->hw);

        dev_gone = brcms_deviceremoved(wlc);

        /* Call any registered down handlers */
        for (i = 0; i < BRCMS_MAXMODULES; i++) {
                if (wlc->modulecb[i].down_fn)
                        callbacks +=
                            wlc->modulecb[i].down_fn(wlc->modulecb[i].hdl);
        }

        /* cancel the watchdog timer */
        if (wlc->WDarmed) {
                if (!brcms_del_timer(wlc->wdtimer))
                        callbacks++;
                wlc->WDarmed = false;
        }
        /* cancel all other timers */
        callbacks += brcms_c_down_del_timer(wlc);

        wlc->pub->up = false;

        wlc_phy_mute_upd(wlc->band->pi, false, PHY_MUTE_ALL);

        callbacks += brcms_b_down_finish(wlc->hw);

        /* brcms_b_down_finish has done brcms_c_coredisable(). so clk is off */
        wlc->clk = false;

        wlc->going_down = false;
        return callbacks;
}

/* Set the current gmode configuration */
int brcms_c_set_gmode(struct brcms_c_info *wlc, u8 gmode, bool config)
{
        int ret = 0;
        uint i;
        struct brcms_c_rateset rs;
        /* Default to 54g Auto */
        /* Advertise and use shortslot (-1/0/1 Auto/Off/On) */
        s8 shortslot = BRCMS_SHORTSLOT_AUTO;
        bool shortslot_restrict = false; /* Restrict association to stations
                                          * that support shortslot
                                          */
        bool ofdm_basic = false;        /* Make 6, 12, and 24 basic rates */
        /* Advertise and use short preambles (-1/0/1 Auto/Off/On) */
        int preamble = BRCMS_PLCP_LONG;
        bool preamble_restrict = false; /* Restrict association to stations
                                         * that support short preambles
                                         */
        struct brcms_band *band;

        /* if N-support is enabled, allow Gmode set as long as requested
         * Gmode is not GMODE_LEGACY_B
         */
        if ((wlc->pub->_n_enab & SUPPORT_11N) && gmode == GMODE_LEGACY_B)
                return -ENOTSUPP;

        /* verify that we are dealing with 2G band and grab the band pointer */
        if (wlc->band->bandtype == BRCM_BAND_2G)
                band = wlc->band;
        else if ((wlc->pub->_nbands > 1) &&
                 (wlc->bandstate[OTHERBANDUNIT(wlc)]->bandtype == BRCM_BAND_2G))
                band = wlc->bandstate[OTHERBANDUNIT(wlc)];
        else
                return -EINVAL;

        /* update configuration value */
        if (config)
                brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER, gmode);

        /* Clear rateset override */
        memset(&rs, 0, sizeof(struct brcms_c_rateset));

        switch (gmode) {
        case GMODE_LEGACY_B:
                shortslot = BRCMS_SHORTSLOT_OFF;
                brcms_c_rateset_copy(&gphy_legacy_rates, &rs);

                break;

        case GMODE_LRS:
                break;

        case GMODE_AUTO:
                /* Accept defaults */
                break;

        case GMODE_ONLY:
                ofdm_basic = true;
                preamble = BRCMS_PLCP_SHORT;
                preamble_restrict = true;
                break;

        case GMODE_PERFORMANCE:
                shortslot = BRCMS_SHORTSLOT_ON;
                shortslot_restrict = true;
                ofdm_basic = true;
                preamble = BRCMS_PLCP_SHORT;
                preamble_restrict = true;
                break;

        default:
                /* Error */
                brcms_err(wlc->hw->d11core, "wl%d: %s: invalid gmode %d\n",
                          wlc->pub->unit, __func__, gmode);
                return -ENOTSUPP;
        }

        band->gmode = gmode;

        wlc->shortslot_override = shortslot;

        /* Use the default 11g rateset */
        if (!rs.count)
                brcms_c_rateset_copy(&cck_ofdm_rates, &rs);

        if (ofdm_basic) {
                for (i = 0; i < rs.count; i++) {
                        if (rs.rates[i] == BRCM_RATE_6M
                            || rs.rates[i] == BRCM_RATE_12M
                            || rs.rates[i] == BRCM_RATE_24M)
                                rs.rates[i] |= BRCMS_RATE_FLAG;
                }
        }

        /* Set default bss rateset */
        wlc->default_bss->rateset.count = rs.count;
        memcpy(wlc->default_bss->rateset.rates, rs.rates,
               sizeof(wlc->default_bss->rateset.rates));

        return ret;
}

int brcms_c_set_nmode(struct brcms_c_info *wlc)
{
        uint i;
        s32 nmode = AUTO;

        if (wlc->stf->txstreams == WL_11N_3x3)
                nmode = WL_11N_3x3;
        else
                nmode = WL_11N_2x2;

        /* force GMODE_AUTO if NMODE is ON */
        brcms_c_set_gmode(wlc, GMODE_AUTO, true);
        if (nmode == WL_11N_3x3)
                wlc->pub->_n_enab = SUPPORT_HT;
        else
                wlc->pub->_n_enab = SUPPORT_11N;
        wlc->default_bss->flags |= BRCMS_BSS_HT;
        /* add the mcs rates to the default and hw ratesets */
        brcms_c_rateset_mcs_build(&wlc->default_bss->rateset,
                              wlc->stf->txstreams);
        for (i = 0; i < wlc->pub->_nbands; i++)
                memcpy(wlc->bandstate[i]->hw_rateset.mcs,
                       wlc->default_bss->rateset.mcs, MCSSET_LEN);

        return 0;
}

static int
brcms_c_set_internal_rateset(struct brcms_c_info *wlc,
                             struct brcms_c_rateset *rs_arg)
{
        struct brcms_c_rateset rs, new;
        uint bandunit;

        memcpy(&rs, rs_arg, sizeof(struct brcms_c_rateset));

        /* check for bad count value */
        if ((rs.count == 0) || (rs.count > BRCMS_NUMRATES))
                return -EINVAL;

        /* try the current band */
        bandunit = wlc->band->bandunit;
        memcpy(&new, &rs, sizeof(struct brcms_c_rateset));
        if (brcms_c_rate_hwrs_filter_sort_validate
            (&new, &wlc->bandstate[bandunit]->hw_rateset, true,
             wlc->stf->txstreams))
                goto good;

        /* try the other band */
        if (brcms_is_mband_unlocked(wlc)) {
                bandunit = OTHERBANDUNIT(wlc);
                memcpy(&new, &rs, sizeof(struct brcms_c_rateset));
                if (brcms_c_rate_hwrs_filter_sort_validate(&new,
                                                       &wlc->
                                                       bandstate[bandunit]->
                                                       hw_rateset, true,
                                                       wlc->stf->txstreams))
                        goto good;
        }

        return -EBADE;

 good:
        /* apply new rateset */
        memcpy(&wlc->default_bss->rateset, &new,
               sizeof(struct brcms_c_rateset));
        memcpy(&wlc->bandstate[bandunit]->defrateset, &new,
               sizeof(struct brcms_c_rateset));
        return 0;
}

static void brcms_c_ofdm_rateset_war(struct brcms_c_info *wlc)
{
        u8 r;
        bool war = false;

        if (wlc->bsscfg->associated)
                r = wlc->bsscfg->current_bss->rateset.rates[0];
        else
                r = wlc->default_bss->rateset.rates[0];

        wlc_phy_ofdm_rateset_war(wlc->band->pi, war);
}

int brcms_c_set_channel(struct brcms_c_info *wlc, u16 channel)
{
        u16 chspec = ch20mhz_chspec(channel);

        if (channel < 0 || channel > MAXCHANNEL)
                return -EINVAL;

        if (!brcms_c_valid_chanspec_db(wlc->cmi, chspec))
                return -EINVAL;


        if (!wlc->pub->up && brcms_is_mband_unlocked(wlc)) {
                if (wlc->band->bandunit != chspec_bandunit(chspec))
                        wlc->bandinit_pending = true;
                else
                        wlc->bandinit_pending = false;
        }

        wlc->default_bss->chanspec = chspec;
        /* brcms_c_BSSinit() will sanitize the rateset before
         * using it.. */
        if (wlc->pub->up && (wlc_phy_chanspec_get(wlc->band->pi) != chspec)) {
                brcms_c_set_home_chanspec(wlc, chspec);
                brcms_c_suspend_mac_and_wait(wlc);
                brcms_c_set_chanspec(wlc, chspec);
                brcms_c_enable_mac(wlc);
        }
        return 0;
}

int brcms_c_set_rate_limit(struct brcms_c_info *wlc, u16 srl, u16 lrl)
{
        int ac;

        if (srl < 1 || srl > RETRY_SHORT_MAX ||
            lrl < 1 || lrl > RETRY_SHORT_MAX)
                return -EINVAL;

        wlc->SRL = srl;
        wlc->LRL = lrl;

        brcms_b_retrylimit_upd(wlc->hw, wlc->SRL, wlc->LRL);

        for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
                wlc->wme_retries[ac] =  SFIELD(wlc->wme_retries[ac],
                                               EDCF_SHORT,  wlc->SRL);
                wlc->wme_retries[ac] =  SFIELD(wlc->wme_retries[ac],
                                               EDCF_LONG, wlc->LRL);
        }
        brcms_c_wme_retries_write(wlc);

        return 0;
}

void brcms_c_get_current_rateset(struct brcms_c_info *wlc,
                                 struct brcm_rateset *currs)
{
        struct brcms_c_rateset *rs;

        if (wlc->pub->associated)
                rs = &wlc->bsscfg->current_bss->rateset;
        else
                rs = &wlc->default_bss->rateset;

        /* Copy only legacy rateset section */
        currs->count = rs->count;
        memcpy(&currs->rates, &rs->rates, rs->count);
}

int brcms_c_set_rateset(struct brcms_c_info *wlc, struct brcm_rateset *rs)
{
        struct brcms_c_rateset internal_rs;
        int bcmerror;

        if (rs->count > BRCMS_NUMRATES)
                return -ENOBUFS;

        memset(&internal_rs, 0, sizeof(struct brcms_c_rateset));

        /* Copy only legacy rateset section */
        internal_rs.count = rs->count;
        memcpy(&internal_rs.rates, &rs->rates, internal_rs.count);

        /* merge rateset coming in with the current mcsset */
        if (wlc->pub->_n_enab & SUPPORT_11N) {
                struct brcms_bss_info *mcsset_bss;
                if (wlc->bsscfg->associated)
                        mcsset_bss = wlc->bsscfg->current_bss;
                else
                        mcsset_bss = wlc->default_bss;
                memcpy(internal_rs.mcs, &mcsset_bss->rateset.mcs[0],
                       MCSSET_LEN);
        }

        bcmerror = brcms_c_set_internal_rateset(wlc, &internal_rs);
        if (!bcmerror)
                brcms_c_ofdm_rateset_war(wlc);

        return bcmerror;
}

int brcms_c_set_beacon_period(struct brcms_c_info *wlc, u16 period)
{
        if (period < DOT11_MIN_BEACON_PERIOD ||
            period > DOT11_MAX_BEACON_PERIOD)
                return -EINVAL;

        wlc->default_bss->beacon_period = period;
        return 0;
}

u16 brcms_c_get_phy_type(struct brcms_c_info *wlc, int phyidx)
{
        return wlc->band->phytype;
}

void brcms_c_set_shortslot_override(struct brcms_c_info *wlc, s8 sslot_override)
{
        wlc->shortslot_override = sslot_override;

        /*
         * shortslot is an 11g feature, so no more work if we are
         * currently on the 5G band
         */
        if (wlc->band->bandtype == BRCM_BAND_5G)
                return;

        if (wlc->pub->up && wlc->pub->associated) {
                /* let watchdog or beacon processing update shortslot */
        } else if (wlc->pub->up) {
                /* unassociated shortslot is off */
                brcms_c_switch_shortslot(wlc, false);
        } else {
                /* driver is down, so just update the brcms_c_info
                 * value */
                if (wlc->shortslot_override == BRCMS_SHORTSLOT_AUTO)
                        wlc->shortslot = false;
                else
                        wlc->shortslot =
                            (wlc->shortslot_override ==
                             BRCMS_SHORTSLOT_ON);
        }
}

/*
 * register watchdog and down handlers.
 */
int brcms_c_module_register(struct brcms_pub *pub,
                            const char *name, struct brcms_info *hdl,
                            int (*d_fn)(void *handle))
{
        struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc;
        int i;

        /* find an empty entry and just add, no duplication check! */
        for (i = 0; i < BRCMS_MAXMODULES; i++) {
                if (wlc->modulecb[i].name[0] == '\0') {
                        strncpy(wlc->modulecb[i].name, name,
                                sizeof(wlc->modulecb[i].name) - 1);
                        wlc->modulecb[i].hdl = hdl;
                        wlc->modulecb[i].down_fn = d_fn;
                        return 0;
                }
        }

        return -ENOSR;
}

/* unregister module callbacks */
int brcms_c_module_unregister(struct brcms_pub *pub, const char *name,
                              struct brcms_info *hdl)
{
        struct brcms_c_info *wlc = (struct brcms_c_info *) pub->wlc;
        int i;

        if (wlc == NULL)
                return -ENODATA;

        for (i = 0; i < BRCMS_MAXMODULES; i++) {
                if (!strcmp(wlc->modulecb[i].name, name) &&
                    (wlc->modulecb[i].hdl == hdl)) {
                        memset(&wlc->modulecb[i], 0, sizeof(struct modulecb));
                        return 0;
                }
        }

        /* table not found! */
        return -ENODATA;
}

static bool brcms_c_chipmatch_pci(struct bcma_device *core)
{
        struct pci_dev *pcidev = core->bus->host_pci;
        u16 vendor = pcidev->vendor;
        u16 device = pcidev->device;

        if (vendor != PCI_VENDOR_ID_BROADCOM) {
                pr_err("unknown vendor id %04x\n", vendor);
                return false;
        }

        if (device == BCM43224_D11N_ID_VEN1 || device == BCM43224_CHIP_ID)
                return true;
        if ((device == BCM43224_D11N_ID) || (device == BCM43225_D11N2G_ID))
                return true;
        if (device == BCM4313_D11N2G_ID)
                return true;
        if ((device == BCM43236_D11N_ID) || (device == BCM43236_D11N2G_ID))
                return true;

        pr_err("unknown device id %04x\n", device);
        return false;
}

static bool brcms_c_chipmatch_soc(struct bcma_device *core)
{
        struct bcma_chipinfo *chipinfo = &core->bus->chipinfo;

        if (chipinfo->id == BCMA_CHIP_ID_BCM4716)
                return true;

        pr_err("unknown chip id %04x\n", chipinfo->id);
        return false;
}

bool brcms_c_chipmatch(struct bcma_device *core)
{
        switch (core->bus->hosttype) {
        case BCMA_HOSTTYPE_PCI:
                return brcms_c_chipmatch_pci(core);
        case BCMA_HOSTTYPE_SOC:
                return brcms_c_chipmatch_soc(core);
        default:
                pr_err("unknown host type: %i\n", core->bus->hosttype);
                return false;
        }
}

u16 brcms_b_rate_shm_offset(struct brcms_hardware *wlc_hw, u8 rate)
{
        u16 table_ptr;
        u8 phy_rate, index;

        /* get the phy specific rate encoding for the PLCP SIGNAL field */
        if (is_ofdm_rate(rate))
                table_ptr = M_RT_DIRMAP_A;
        else
                table_ptr = M_RT_DIRMAP_B;

        /* for a given rate, the LS-nibble of the PLCP SIGNAL field is
         * the index into the rate table.
         */
        phy_rate = rate_info[rate] & BRCMS_RATE_MASK;
        index = phy_rate & 0xf;

        /* Find the SHM pointer to the rate table entry by looking in the
         * Direct-map Table
         */
        return 2 * brcms_b_read_shm(wlc_hw, table_ptr + (index * 2));
}

/*
 * bcmc_fid_generate:
 * Generate frame ID for a BCMC packet.  The frag field is not used
 * for MC frames so is used as part of the sequence number.
 */
static inline u16
bcmc_fid_generate(struct brcms_c_info *wlc, struct brcms_bss_cfg *bsscfg,
                  struct d11txh *txh)
{
        u16 frameid;

        frameid = le16_to_cpu(txh->TxFrameID) & ~(TXFID_SEQ_MASK |
                                                  TXFID_QUEUE_MASK);
        frameid |=
            (((wlc->
               mc_fid_counter++) << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) |
            TX_BCMC_FIFO;

        return frameid;
}

static uint
brcms_c_calc_ack_time(struct brcms_c_info *wlc, u32 rspec,
                      u8 preamble_type)
{
        uint dur = 0;

        /*
         * Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that
         * is less than or equal to the rate of the immediately previous
         * frame in the FES
         */
        rspec = brcms_basic_rate(wlc, rspec);
        /* ACK frame len == 14 == 2(fc) + 2(dur) + 6(ra) + 4(fcs) */
        dur =
            brcms_c_calc_frame_time(wlc, rspec, preamble_type,
                                (DOT11_ACK_LEN + FCS_LEN));
        return dur;
}

static uint
brcms_c_calc_cts_time(struct brcms_c_info *wlc, u32 rspec,
                      u8 preamble_type)
{
        return brcms_c_calc_ack_time(wlc, rspec, preamble_type);
}

static uint
brcms_c_calc_ba_time(struct brcms_c_info *wlc, u32 rspec,
                     u8 preamble_type)
{
        /*
         * Spec 9.6: ack rate is the highest rate in BSSBasicRateSet that
         * is less than or equal to the rate of the immediately previous
         * frame in the FES
         */
        rspec = brcms_basic_rate(wlc, rspec);
        /* BA len == 32 == 16(ctl hdr) + 4(ba len) + 8(bitmap) + 4(fcs) */
        return brcms_c_calc_frame_time(wlc, rspec, preamble_type,
                                   (DOT11_BA_LEN + DOT11_BA_BITMAP_LEN +
                                    FCS_LEN));
}

/* brcms_c_compute_frame_dur()
 *
 * Calculate the 802.11 MAC header DUR field for MPDU
 * DUR for a single frame = 1 SIFS + 1 ACK
 * DUR for a frame with following frags = 3 SIFS + 2 ACK + next frag time
 *
 * rate                 MPDU rate in unit of 500kbps
 * next_frag_len        next MPDU length in bytes
 * preamble_type        use short/GF or long/MM PLCP header
 */
static u16
brcms_c_compute_frame_dur(struct brcms_c_info *wlc, u32 rate,
                      u8 preamble_type, uint next_frag_len)
{
        u16 dur, sifs;

        sifs = get_sifs(wlc->band);

        dur = sifs;
        dur += (u16) brcms_c_calc_ack_time(wlc, rate, preamble_type);

        if (next_frag_len) {
                /* Double the current DUR to get 2 SIFS + 2 ACKs */
                dur *= 2;
                /* add another SIFS and the frag time */
                dur += sifs;
                dur +=
                    (u16) brcms_c_calc_frame_time(wlc, rate, preamble_type,
                                                 next_frag_len);
        }
        return dur;
}

/* The opposite of brcms_c_calc_frame_time */
static uint
brcms_c_calc_frame_len(struct brcms_c_info *wlc, u32 ratespec,
                   u8 preamble_type, uint dur)
{
        uint nsyms, mac_len, Ndps, kNdps;
        uint rate = rspec2rate(ratespec);

        if (is_mcs_rate(ratespec)) {
                uint mcs = ratespec & RSPEC_RATE_MASK;
                int tot_streams = mcs_2_txstreams(mcs) + rspec_stc(ratespec);
                dur -= PREN_PREAMBLE + (tot_streams * PREN_PREAMBLE_EXT);
                /* payload calculation matches that of regular ofdm */
                if (wlc->band->bandtype == BRCM_BAND_2G)
                        dur -= DOT11_OFDM_SIGNAL_EXTENSION;
                /* kNdbps = kbps * 4 */
                kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec),
                                   rspec_issgi(ratespec)) * 4;
                nsyms = dur / APHY_SYMBOL_TIME;
                mac_len =
                    ((nsyms * kNdps) -
                     ((APHY_SERVICE_NBITS + APHY_TAIL_NBITS) * 1000)) / 8000;
        } else if (is_ofdm_rate(ratespec)) {
                dur -= APHY_PREAMBLE_TIME;
                dur -= APHY_SIGNAL_TIME;
                /* Ndbps = Mbps * 4 = rate(500Kbps) * 2 */
                Ndps = rate * 2;
                nsyms = dur / APHY_SYMBOL_TIME;
                mac_len =
                    ((nsyms * Ndps) -
                     (APHY_SERVICE_NBITS + APHY_TAIL_NBITS)) / 8;
        } else {
                if (preamble_type & BRCMS_SHORT_PREAMBLE)
                        dur -= BPHY_PLCP_SHORT_TIME;
                else
                        dur -= BPHY_PLCP_TIME;
                mac_len = dur * rate;
                /* divide out factor of 2 in rate (1/2 mbps) */
                mac_len = mac_len / 8 / 2;
        }
        return mac_len;
}

/*
 * Return true if the specified rate is supported by the specified band.
 * BRCM_BAND_AUTO indicates the current band.
 */
static bool brcms_c_valid_rate(struct brcms_c_info *wlc, u32 rspec, int band,
                    bool verbose)
{
        struct brcms_c_rateset *hw_rateset;
        uint i;

        if ((band == BRCM_BAND_AUTO) || (band == wlc->band->bandtype))
                hw_rateset = &wlc->band->hw_rateset;
        else if (wlc->pub->_nbands > 1)
                hw_rateset = &wlc->bandstate[OTHERBANDUNIT(wlc)]->hw_rateset;
        else
                /* other band specified and we are a single band device */
                return false;

        /* check if this is a mimo rate */
        if (is_mcs_rate(rspec)) {
                if ((rspec & RSPEC_RATE_MASK) >= MCS_TABLE_SIZE)
                        goto error;

                return isset(hw_rateset->mcs, (rspec & RSPEC_RATE_MASK));
        }

        for (i = 0; i < hw_rateset->count; i++)
                if (hw_rateset->rates[i] == rspec2rate(rspec))
                        return true;
 error:
        if (verbose)
                brcms_err(wlc->hw->d11core, "wl%d: valid_rate: rate spec 0x%x "
                          "not in hw_rateset\n", wlc->pub->unit, rspec);

        return false;
}

static u32
mac80211_wlc_set_nrate(struct brcms_c_info *wlc, struct brcms_band *cur_band,
                       u32 int_val)
{
        struct bcma_device *core = wlc->hw->d11core;
        u8 stf = (int_val & NRATE_STF_MASK) >> NRATE_STF_SHIFT;
        u8 rate = int_val & NRATE_RATE_MASK;
        u32 rspec;
        bool ismcs = ((int_val & NRATE_MCS_INUSE) == NRATE_MCS_INUSE);
        bool issgi = ((int_val & NRATE_SGI_MASK) >> NRATE_SGI_SHIFT);
        bool override_mcs_only = ((int_val & NRATE_OVERRIDE_MCS_ONLY)
                                  == NRATE_OVERRIDE_MCS_ONLY);
        int bcmerror = 0;

        if (!ismcs)
                return (u32) rate;

        /* validate the combination of rate/mcs/stf is allowed */
        if ((wlc->pub->_n_enab & SUPPORT_11N) && ismcs) {
                /* mcs only allowed when nmode */
                if (stf > PHY_TXC1_MODE_SDM) {
                        brcms_err(core, "wl%d: %s: Invalid stf\n",
                                  wlc->pub->unit, __func__);
                        bcmerror = -EINVAL;
                        goto done;
                }

                /* mcs 32 is a special case, DUP mode 40 only */
                if (rate == 32) {
                        if (!CHSPEC_IS40(wlc->home_chanspec) ||
                            ((stf != PHY_TXC1_MODE_SISO)
                             && (stf != PHY_TXC1_MODE_CDD))) {
                                brcms_err(core, "wl%d: %s: Invalid mcs 32\n",
                                          wlc->pub->unit, __func__);
                                bcmerror = -EINVAL;
                                goto done;
                        }
                        /* mcs > 7 must use stf SDM */
                } else if (rate > HIGHEST_SINGLE_STREAM_MCS) {
                        /* mcs > 7 must use stf SDM */
                        if (stf != PHY_TXC1_MODE_SDM) {
                                brcms_dbg_mac80211(core, "wl%d: enabling "
                                                   "SDM mode for mcs %d\n",
                                                   wlc->pub->unit, rate);
                                stf = PHY_TXC1_MODE_SDM;
                        }
                } else {
                        /*
                         * MCS 0-7 may use SISO, CDD, and for
                         * phy_rev >= 3 STBC
                         */
                        if ((stf > PHY_TXC1_MODE_STBC) ||
                            (!BRCMS_STBC_CAP_PHY(wlc)
                             && (stf == PHY_TXC1_MODE_STBC))) {
                                brcms_err(core, "wl%d: %s: Invalid STBC\n",
                                          wlc->pub->unit, __func__);
                                bcmerror = -EINVAL;
                                goto done;
                        }
                }
        } else if (is_ofdm_rate(rate)) {
                if ((stf != PHY_TXC1_MODE_CDD) && (stf != PHY_TXC1_MODE_SISO)) {
                        brcms_err(core, "wl%d: %s: Invalid OFDM\n",
                                  wlc->pub->unit, __func__);
                        bcmerror = -EINVAL;
                        goto done;
                }
        } else if (is_cck_rate(rate)) {
                if ((cur_band->bandtype != BRCM_BAND_2G)
                    || (stf != PHY_TXC1_MODE_SISO)) {
                        brcms_err(core, "wl%d: %s: Invalid CCK\n",
                                  wlc->pub->unit, __func__);
                        bcmerror = -EINVAL;
                        goto done;
                }
        } else {
                brcms_err(core, "wl%d: %s: Unknown rate type\n",
                          wlc->pub->unit, __func__);
                bcmerror = -EINVAL;
                goto done;
        }
        /* make sure multiple antennae are available for non-siso rates */
        if ((stf != PHY_TXC1_MODE_SISO) && (wlc->stf->txstreams == 1)) {
                brcms_err(core, "wl%d: %s: SISO antenna but !SISO "
                          "request\n", wlc->pub->unit, __func__);
                bcmerror = -EINVAL;
                goto done;
        }

        rspec = rate;
        if (ismcs) {
                rspec |= RSPEC_MIMORATE;
                /* For STBC populate the STC field of the ratespec */
                if (stf == PHY_TXC1_MODE_STBC) {
                        u8 stc;
                        stc = 1;        /* Nss for single stream is always 1 */
                        rspec |= (stc << RSPEC_STC_SHIFT);
                }
        }

        rspec |= (stf << RSPEC_STF_SHIFT);

        if (override_mcs_only)
                rspec |= RSPEC_OVERRIDE_MCS_ONLY;

        if (issgi)
                rspec |= RSPEC_SHORT_GI;

        if ((rate != 0)
            && !brcms_c_valid_rate(wlc, rspec, cur_band->bandtype, true))
                return rate;

        return rspec;
done:
        return rate;
}

/*
 * Compute PLCP, but only requires actual rate and length of pkt.
 * Rate is given in the driver standard multiple of 500 kbps.
 * le is set for 11 Mbps rate if necessary.
 * Broken out for PRQ.
 */

static void brcms_c_cck_plcp_set(struct brcms_c_info *wlc, int rate_500,
                             uint length, u8 *plcp)
{
        u16 usec = 0;
        u8 le = 0;

        switch (rate_500) {
        case BRCM_RATE_1M:
                usec = length << 3;
                break;
        case BRCM_RATE_2M:
                usec = length << 2;
                break;
        case BRCM_RATE_5M5:
                usec = (length << 4) / 11;
                if ((length << 4) - (usec * 11) > 0)
                        usec++;
                break;
        case BRCM_RATE_11M:
                usec = (length << 3) / 11;
                if ((length << 3) - (usec * 11) > 0) {
                        usec++;
                        if ((usec * 11) - (length << 3) >= 8)
                                le = D11B_PLCP_SIGNAL_LE;
                }
                break;

        default:
                brcms_err(wlc->hw->d11core,
                          "brcms_c_cck_plcp_set: unsupported rate %d\n",
                          rate_500);
                rate_500 = BRCM_RATE_1M;
                usec = length << 3;
                break;
        }
        /* PLCP signal byte */
        plcp[0] = rate_500 * 5; /* r (500kbps) * 5 == r (100kbps) */
        /* PLCP service byte */
        plcp[1] = (u8) (le | D11B_PLCP_SIGNAL_LOCKED);
        /* PLCP length u16, little endian */
        plcp[2] = usec & 0xff;
        plcp[3] = (usec >> 8) & 0xff;
        /* PLCP CRC16 */
        plcp[4] = 0;
        plcp[5] = 0;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void brcms_c_compute_mimo_plcp(u32 rspec, uint length, u8 *plcp)
{
        u8 mcs = (u8) (rspec & RSPEC_RATE_MASK);
        plcp[0] = mcs;
        if (rspec_is40mhz(rspec) || (mcs == 32))
                plcp[0] |= MIMO_PLCP_40MHZ;
        BRCMS_SET_MIMO_PLCP_LEN(plcp, length);
        plcp[3] = rspec_mimoplcp3(rspec); /* rspec already holds this byte */
        plcp[3] |= 0x7; /* set smoothing, not sounding ppdu & reserved */
        plcp[4] = 0; /* number of extension spatial streams bit 0 & 1 */
        plcp[5] = 0;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void
brcms_c_compute_ofdm_plcp(u32 rspec, u32 length, u8 *plcp)
{
        u8 rate_signal;
        u32 tmp = 0;
        int rate = rspec2rate(rspec);

        /*
         * encode rate per 802.11a-1999 sec 17.3.4.1, with lsb
         * transmitted first
         */
        rate_signal = rate_info[rate] & BRCMS_RATE_MASK;
        memset(plcp, 0, D11_PHY_HDR_LEN);
        D11A_PHY_HDR_SRATE((struct ofdm_phy_hdr *) plcp, rate_signal);

        tmp = (length & 0xfff) << 5;
        plcp[2] |= (tmp >> 16) & 0xff;
        plcp[1] |= (tmp >> 8) & 0xff;
        plcp[0] |= tmp & 0xff;
}

/* Rate: 802.11 rate code, length: PSDU length in octets */
static void brcms_c_compute_cck_plcp(struct brcms_c_info *wlc, u32 rspec,
                                 uint length, u8 *plcp)
{
        int rate = rspec2rate(rspec);

        brcms_c_cck_plcp_set(wlc, rate, length, plcp);
}

static void
brcms_c_compute_plcp(struct brcms_c_info *wlc, u32 rspec,
                     uint length, u8 *plcp)
{
        if (is_mcs_rate(rspec))
                brcms_c_compute_mimo_plcp(rspec, length, plcp);
        else if (is_ofdm_rate(rspec))
                brcms_c_compute_ofdm_plcp(rspec, length, plcp);
        else
                brcms_c_compute_cck_plcp(wlc, rspec, length, plcp);
}

/* brcms_c_compute_rtscts_dur()
 *
 * Calculate the 802.11 MAC header DUR field for an RTS or CTS frame
 * DUR for normal RTS/CTS w/ frame = 3 SIFS + 1 CTS + next frame time + 1 ACK
 * DUR for CTS-TO-SELF w/ frame    = 2 SIFS         + next frame time + 1 ACK
 *
 * cts                  cts-to-self or rts/cts
 * rts_rate             rts or cts rate in unit of 500kbps
 * rate                 next MPDU rate in unit of 500kbps
 * frame_len            next MPDU frame length in bytes
 */
u16
brcms_c_compute_rtscts_dur(struct brcms_c_info *wlc, bool cts_only,
                           u32 rts_rate,
                           u32 frame_rate, u8 rts_preamble_type,
                           u8 frame_preamble_type, uint frame_len, bool ba)
{
        u16 dur, sifs;

        sifs = get_sifs(wlc->band);

        if (!cts_only) {
                /* RTS/CTS */
                dur = 3 * sifs;
                dur +=
                    (u16) brcms_c_calc_cts_time(wlc, rts_rate,
                                               rts_preamble_type);
        } else {
                /* CTS-TO-SELF */
                dur = 2 * sifs;
        }

        dur +=
            (u16) brcms_c_calc_frame_time(wlc, frame_rate, frame_preamble_type,
                                         frame_len);
        if (ba)
                dur +=
                    (u16) brcms_c_calc_ba_time(wlc, frame_rate,
                                              BRCMS_SHORT_PREAMBLE);
        else
                dur +=
                    (u16) brcms_c_calc_ack_time(wlc, frame_rate,
                                               frame_preamble_type);
        return dur;
}

static u16 brcms_c_phytxctl1_calc(struct brcms_c_info *wlc, u32 rspec)
{
        u16 phyctl1 = 0;
        u16 bw;

        if (BRCMS_ISLCNPHY(wlc->band)) {
                bw = PHY_TXC1_BW_20MHZ;
        } else {
                bw = rspec_get_bw(rspec);
                /* 10Mhz is not supported yet */
                if (bw < PHY_TXC1_BW_20MHZ) {
                        brcms_err(wlc->hw->d11core, "phytxctl1_calc: bw %d is "
                                  "not supported yet, set to 20L\n", bw);
                        bw = PHY_TXC1_BW_20MHZ;
                }
        }

        if (is_mcs_rate(rspec)) {
                uint mcs = rspec & RSPEC_RATE_MASK;

                /* bw, stf, coding-type is part of rspec_phytxbyte2 returns */
                phyctl1 = rspec_phytxbyte2(rspec);
                /* set the upper byte of phyctl1 */
                phyctl1 |= (mcs_table[mcs].tx_phy_ctl3 << 8);
        } else if (is_cck_rate(rspec) && !BRCMS_ISLCNPHY(wlc->band)
                   && !BRCMS_ISSSLPNPHY(wlc->band)) {
                /*
                 * In CCK mode LPPHY overloads OFDM Modulation bits with CCK
                 * Data Rate. Eventually MIMOPHY would also be converted to
                 * this format
                 */
                /* 0 = 1Mbps; 1 = 2Mbps; 2 = 5.5Mbps; 3 = 11Mbps */
                phyctl1 = (bw | (rspec_stf(rspec) << PHY_TXC1_MODE_SHIFT));
        } else {                /* legacy OFDM/CCK */
                s16 phycfg;
                /* get the phyctl byte from rate phycfg table */
                phycfg = brcms_c_rate_legacy_phyctl(rspec2rate(rspec));
                if (phycfg == -1) {
                        brcms_err(wlc->hw->d11core, "phytxctl1_calc: wrong "
                                  "legacy OFDM/CCK rate\n");
                        phycfg = 0;
                }
                /* set the upper byte of phyctl1 */
                phyctl1 =
                    (bw | (phycfg << 8) |
                     (rspec_stf(rspec) << PHY_TXC1_MODE_SHIFT));
        }
        return phyctl1;
}

/*
 * Add struct d11txh, struct cck_phy_hdr.
 *
 * 'p' data must start with 802.11 MAC header
 * 'p' must allow enough bytes of local headers to be "pushed" onto the packet
 *
 * headroom == D11_PHY_HDR_LEN + D11_TXH_LEN (D11_TXH_LEN is now 104 bytes)
 *
 */
static u16
brcms_c_d11hdrs_mac80211(struct brcms_c_info *wlc, struct ieee80211_hw *hw,
                     struct sk_buff *p, struct scb *scb, uint frag,
                     uint nfrags, uint queue, uint next_frag_len)
{
        struct ieee80211_hdr *h;
        struct d11txh *txh;
        u8 *plcp, plcp_fallback[D11_PHY_HDR_LEN];
        int len, phylen, rts_phylen;
        u16 mch, phyctl, xfts, mainrates;
        u16 seq = 0, mcl = 0, status = 0, frameid = 0;
        u32 rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M };
        u32 rts_rspec[2] = { BRCM_RATE_1M, BRCM_RATE_1M };
        bool use_rts = false;
        bool use_cts = false;
        bool use_rifs = false;
        bool short_preamble[2] = { false, false };
        u8 preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE };
        u8 rts_preamble_type[2] = { BRCMS_LONG_PREAMBLE, BRCMS_LONG_PREAMBLE };
        u8 *rts_plcp, rts_plcp_fallback[D11_PHY_HDR_LEN];
        struct ieee80211_rts *rts = NULL;
        bool qos;
        uint ac;
        bool hwtkmic = false;
        u16 mimo_ctlchbw = PHY_TXC1_BW_20MHZ;
#define ANTCFG_NONE 0xFF
        u8 antcfg = ANTCFG_NONE;
        u8 fbantcfg = ANTCFG_NONE;
        uint phyctl1_stf = 0;
        u16 durid = 0;
        struct ieee80211_tx_rate *txrate[2];
        int k;
        struct ieee80211_tx_info *tx_info;
        bool is_mcs;
        u16 mimo_txbw;
        u8 mimo_preamble_type;

        /* locate 802.11 MAC header */
        h = (struct ieee80211_hdr *)(p->data);
        qos = ieee80211_is_data_qos(h->frame_control);

        /* compute length of frame in bytes for use in PLCP computations */
        len = p->len;
        phylen = len + FCS_LEN;

        /* Get tx_info */
        tx_info = IEEE80211_SKB_CB(p);

        /* add PLCP */
        plcp = skb_push(p, D11_PHY_HDR_LEN);

        /* add Broadcom tx descriptor header */
        txh = (struct d11txh *) skb_push(p, D11_TXH_LEN);
        memset(txh, 0, D11_TXH_LEN);

        /* setup frameid */
        if (tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
                /* non-AP STA should never use BCMC queue */
                if (queue == TX_BCMC_FIFO) {
                        brcms_err(wlc->hw->d11core,
                                  "wl%d: %s: ASSERT queue == TX_BCMC!\n",
                                  wlc->pub->unit, __func__);
                        frameid = bcmc_fid_generate(wlc, NULL, txh);
                } else {
                        /* Increment the counter for first fragment */
                        if (tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
                                scb->seqnum[p->priority]++;

                        /* extract fragment number from frame first */
                        seq = le16_to_cpu(h->seq_ctrl) & FRAGNUM_MASK;
                        seq |= (scb->seqnum[p->priority] << SEQNUM_SHIFT);
                        h->seq_ctrl = cpu_to_le16(seq);

                        frameid = ((seq << TXFID_SEQ_SHIFT) & TXFID_SEQ_MASK) |
                            (queue & TXFID_QUEUE_MASK);
                }
        }
        frameid |= queue & TXFID_QUEUE_MASK;

        /* set the ignpmq bit for all pkts tx'd in PS mode and for beacons */
        if (ieee80211_is_beacon(h->frame_control))
                mcl |= TXC_IGNOREPMQ;

        txrate[0] = tx_info->control.rates;
        txrate[1] = txrate[0] + 1;

        /*
         * if rate control algorithm didn't give us a fallback
         * rate, use the primary rate
         */
        if (txrate[1]->idx < 0)
                txrate[1] = txrate[0];

        for (k = 0; k < hw->max_rates; k++) {
                is_mcs = txrate[k]->flags & IEEE80211_TX_RC_MCS ? true : false;
                if (!is_mcs) {
                        if ((txrate[k]->idx >= 0)
                            && (txrate[k]->idx <
                                hw->wiphy->bands[tx_info->band]->n_bitrates)) {
                                rspec[k] =
                                    hw->wiphy->bands[tx_info->band]->
                                    bitrates[txrate[k]->idx].hw_value;
                                short_preamble[k] =
                                    txrate[k]->
                                    flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE ?
                                    true : false;
                        } else {
                                rspec[k] = BRCM_RATE_1M;
                        }
                } else {
                        rspec[k] = mac80211_wlc_set_nrate(wlc, wlc->band,
                                        NRATE_MCS_INUSE | txrate[k]->idx);
                }

                /*
                 * Currently only support same setting for primay and
                 * fallback rates. Unify flags for each rate into a
                 * single value for the frame
                 */
                use_rts |=
                    txrate[k]->
                    flags & IEEE80211_TX_RC_USE_RTS_CTS ? true : false;
                use_cts |=
                    txrate[k]->
                    flags & IEEE80211_TX_RC_USE_CTS_PROTECT ? true : false;


                /*
                 * (1) RATE:
                 *   determine and validate primary rate
                 *   and fallback rates
                 */
                if (!rspec_active(rspec[k])) {
                        rspec[k] = BRCM_RATE_1M;
                } else {
                        if (!is_multicast_ether_addr(h->addr1)) {
                                /* set tx antenna config */
                                brcms_c_antsel_antcfg_get(wlc->asi, false,
                                        false, 0, 0, &antcfg, &fbantcfg);
                        }
                }
        }

        phyctl1_stf = wlc->stf->ss_opmode;

        if (wlc->pub->_n_enab & SUPPORT_11N) {
                for (k = 0; k < hw->max_rates; k++) {
                        /*
                         * apply siso/cdd to single stream mcs's or ofdm
                         * if rspec is auto selected
                         */
                        if (((is_mcs_rate(rspec[k]) &&
                              is_single_stream(rspec[k] & RSPEC_RATE_MASK)) ||
                             is_ofdm_rate(rspec[k]))
                            && ((rspec[k] & RSPEC_OVERRIDE_MCS_ONLY)
                                || !(rspec[k] & RSPEC_OVERRIDE))) {
                                rspec[k] &= ~(RSPEC_STF_MASK | RSPEC_STC_MASK);

                                /* For SISO MCS use STBC if possible */
                                if (is_mcs_rate(rspec[k])
                                    && BRCMS_STF_SS_STBC_TX(wlc, scb)) {
                                        u8 stc;

                                        /* Nss for single stream is always 1 */
                                        stc = 1;
                                        rspec[k] |= (PHY_TXC1_MODE_STBC <<
                                                        RSPEC_STF_SHIFT) |
                                                    (stc << RSPEC_STC_SHIFT);
                                } else
                                        rspec[k] |=
                                            (phyctl1_stf << RSPEC_STF_SHIFT);
                        }

                        /*
                         * Is the phy configured to use 40MHZ frames? If
                         * so then pick the desired txbw
                         */
                        if (brcms_chspec_bw(wlc->chanspec) == BRCMS_40_MHZ) {
                                /* default txbw is 20in40 SB */
                                mimo_ctlchbw = mimo_txbw =
                                   CHSPEC_SB_UPPER(wlc_phy_chanspec_get(
                                                                 wlc->band->pi))
                                   ? PHY_TXC1_BW_20MHZ_UP : PHY_TXC1_BW_20MHZ;

                                if (is_mcs_rate(rspec[k])) {
                                        /* mcs 32 must be 40b/w DUP */
                                        if ((rspec[k] & RSPEC_RATE_MASK)
                                            == 32) {
                                                mimo_txbw =
                                                    PHY_TXC1_BW_40MHZ_DUP;
                                                /* use override */
                                        } else if (wlc->mimo_40txbw != AUTO)
                                                mimo_txbw = wlc->mimo_40txbw;
                                        /* else check if dst is using 40 Mhz */
                                        else if (scb->flags & SCB_IS40)
                                                mimo_txbw = PHY_TXC1_BW_40MHZ;
                                } else if (is_ofdm_rate(rspec[k])) {
                                        if (wlc->ofdm_40txbw != AUTO)
                                                mimo_txbw = wlc->ofdm_40txbw;
                                } else if (wlc->cck_40txbw != AUTO) {
                                        mimo_txbw = wlc->cck_40txbw;
                                }
                        } else {
                                /*
                                 * mcs32 is 40 b/w only.
                                 * This is possible for probe packets on
                                 * a STA during SCAN
                                 */
                                if ((rspec[k] & RSPEC_RATE_MASK) == 32)
                                        /* mcs 0 */
                                        rspec[k] = RSPEC_MIMORATE;

                                mimo_txbw = PHY_TXC1_BW_20MHZ;
                        }

                        /* Set channel width */
                        rspec[k] &= ~RSPEC_BW_MASK;
                        if ((k == 0) || ((k > 0) && is_mcs_rate(rspec[k])))
                                rspec[k] |= (mimo_txbw << RSPEC_BW_SHIFT);
                        else
                                rspec[k] |= (mimo_ctlchbw << RSPEC_BW_SHIFT);

                        /* Disable short GI, not supported yet */
                        rspec[k] &= ~RSPEC_SHORT_GI;

                        mimo_preamble_type = BRCMS_MM_PREAMBLE;
                        if (txrate[k]->flags & IEEE80211_TX_RC_GREEN_FIELD)
                                mimo_preamble_type = BRCMS_GF_PREAMBLE;

                        if ((txrate[k]->flags & IEEE80211_TX_RC_MCS)
                            && (!is_mcs_rate(rspec[k]))) {
                                brcms_err(wlc->hw->d11core,
                                          "wl%d: %s: IEEE80211_TX_"
                                          "RC_MCS != is_mcs_rate(rspec)\n",
                                          wlc->pub->unit, __func__);
                        }

                        if (is_mcs_rate(rspec[k])) {
                                preamble_type[k] = mimo_preamble_type;

                                /*
                                 * if SGI is selected, then forced mm
                                 * for single stream
                                 */
                                if ((rspec[k] & RSPEC_SHORT_GI)
                                    && is_single_stream(rspec[k] &
                                                        RSPEC_RATE_MASK))
                                        preamble_type[k] = BRCMS_MM_PREAMBLE;
                        }

                        /* should be better conditionalized */
                        if (!is_mcs_rate(rspec[0])
                            && (tx_info->control.rates[0].
                                flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE))
                                preamble_type[k] = BRCMS_SHORT_PREAMBLE;
                }
        } else {
                for (k = 0; k < hw->max_rates; k++) {
                        /* Set ctrlchbw as 20Mhz */
                        rspec[k] &= ~RSPEC_BW_MASK;
                        rspec[k] |= (PHY_TXC1_BW_20MHZ << RSPEC_BW_SHIFT);

                        /* for nphy, stf of ofdm frames must follow policies */
                        if (BRCMS_ISNPHY(wlc->band) && is_ofdm_rate(rspec[k])) {
                                rspec[k] &= ~RSPEC_STF_MASK;
                                rspec[k] |= phyctl1_stf << RSPEC_STF_SHIFT;
                        }
                }
        }

        /* Reset these for use with AMPDU's */
        txrate[0]->count = 0;
        txrate[1]->count = 0;

        /* (2) PROTECTION, may change rspec */
        if ((ieee80211_is_data(h->frame_control) ||
            ieee80211_is_mgmt(h->frame_control)) &&
            (phylen > wlc->RTSThresh) && !is_multicast_ether_addr(h->addr1))
                use_rts = true;

        /* (3) PLCP: determine PLCP header and MAC duration,
         * fill struct d11txh */
        brcms_c_compute_plcp(wlc, rspec[0], phylen, plcp);
        brcms_c_compute_plcp(wlc, rspec[1], phylen, plcp_fallback);
        memcpy(&txh->FragPLCPFallback,
               plcp_fallback, sizeof(txh->FragPLCPFallback));

        /* Length field now put in CCK FBR CRC field */
        if (is_cck_rate(rspec[1])) {
                txh->FragPLCPFallback[4] = phylen & 0xff;
                txh->FragPLCPFallback[5] = (phylen & 0xff00) >> 8;
        }

        /* MIMO-RATE: need validation ?? */
        mainrates = is_ofdm_rate(rspec[0]) ?
                        D11A_PHY_HDR_GRATE((struct ofdm_phy_hdr *) plcp) :
                        plcp[0];

        /* DUR field for main rate */
        if (!ieee80211_is_pspoll(h->frame_control) &&
            !is_multicast_ether_addr(h->addr1) && !use_rifs) {
                durid =
                    brcms_c_compute_frame_dur(wlc, rspec[0], preamble_type[0],
                                          next_frag_len);
                h->duration_id = cpu_to_le16(durid);
        } else if (use_rifs) {
                /* NAV protect to end of next max packet size */
                durid =
                    (u16) brcms_c_calc_frame_time(wlc, rspec[0],
                                                 preamble_type[0],
                                                 DOT11_MAX_FRAG_LEN);
                durid += RIFS_11N_TIME;
                h->duration_id = cpu_to_le16(durid);
        }

        /* DUR field for fallback rate */
        if (ieee80211_is_pspoll(h->frame_control))
                txh->FragDurFallback = h->duration_id;
        else if (is_multicast_ether_addr(h->addr1) || use_rifs)
                txh->FragDurFallback = 0;
        else {
                durid = brcms_c_compute_frame_dur(wlc, rspec[1],
                                              preamble_type[1], next_frag_len);
                txh->FragDurFallback = cpu_to_le16(durid);
        }

        /* (4) MAC-HDR: MacTxControlLow */
        if (frag == 0)
                mcl |= TXC_STARTMSDU;

        if (!is_multicast_ether_addr(h->addr1))
                mcl |= TXC_IMMEDACK;

        if (wlc->band->bandtype == BRCM_BAND_5G)
                mcl |= TXC_FREQBAND_5G;

        if (CHSPEC_IS40(wlc_phy_chanspec_get(wlc->band->pi)))
                mcl |= TXC_BW_40;

        /* set AMIC bit if using hardware TKIP MIC */
        if (hwtkmic)
                mcl |= TXC_AMIC;

        txh->MacTxControlLow = cpu_to_le16(mcl);

        /* MacTxControlHigh */
        mch = 0;

        /* Set fallback rate preamble type */
        if ((preamble_type[1] == BRCMS_SHORT_PREAMBLE) ||
            (preamble_type[1] == BRCMS_GF_PREAMBLE)) {
                if (rspec2rate(rspec[1]) != BRCM_RATE_1M)
                        mch |= TXC_PREAMBLE_DATA_FB_SHORT;
        }

        /* MacFrameControl */
        memcpy(&txh->MacFrameControl, &h->frame_control, sizeof(u16));
        txh->TxFesTimeNormal = cpu_to_le16(0);

        txh->TxFesTimeFallback = cpu_to_le16(0);

        /* TxFrameRA */
        memcpy(&txh->TxFrameRA, &h->addr1, ETH_ALEN);

        /* TxFrameID */
        txh->TxFrameID = cpu_to_le16(frameid);

        /*
         * TxStatus, Note the case of recreating the first frag of a suppressed
         * frame then we may need to reset the retry cnt's via the status reg
         */
        txh->TxStatus = cpu_to_le16(status);

        /*
         * extra fields for ucode AMPDU aggregation, the new fields are added to
         * the END of previous structure so that it's compatible in driver.
         */
        txh->MaxNMpdus = cpu_to_le16(0);
        txh->MaxABytes_MRT = cpu_to_le16(0);
        txh->MaxABytes_FBR = cpu_to_le16(0);
        txh->MinMBytes = cpu_to_le16(0);

        /* (5) RTS/CTS: determine RTS/CTS PLCP header and MAC duration,
         * furnish struct d11txh */
        /* RTS PLCP header and RTS frame */
        if (use_rts || use_cts) {
                if (use_rts && use_cts)
                        use_cts = false;

                for (k = 0; k < 2; k++) {
                        rts_rspec[k] = brcms_c_rspec_to_rts_rspec(wlc, rspec[k],
                                                              false,
                                                              mimo_ctlchbw);
                }

                if (!is_ofdm_rate(rts_rspec[0]) &&
                    !((rspec2rate(rts_rspec[0]) == BRCM_RATE_1M) ||
                      (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) {
                        rts_preamble_type[0] = BRCMS_SHORT_PREAMBLE;
                        mch |= TXC_PREAMBLE_RTS_MAIN_SHORT;
                }

                if (!is_ofdm_rate(rts_rspec[1]) &&
                    !((rspec2rate(rts_rspec[1]) == BRCM_RATE_1M) ||
                      (wlc->PLCPHdr_override == BRCMS_PLCP_LONG))) {
                        rts_preamble_type[1] = BRCMS_SHORT_PREAMBLE;
                        mch |= TXC_PREAMBLE_RTS_FB_SHORT;
                }

                /* RTS/CTS additions to MacTxControlLow */
                if (use_cts) {
                        txh->MacTxControlLow |= cpu_to_le16(TXC_SENDCTS);
                } else {
                        txh->MacTxControlLow |= cpu_to_le16(TXC_SENDRTS);
                        txh->MacTxControlLow |= cpu_to_le16(TXC_LONGFRAME);
                }

                /* RTS PLCP header */
                rts_plcp = txh->RTSPhyHeader;
                if (use_cts)
                        rts_phylen = DOT11_CTS_LEN + FCS_LEN;
                else
                        rts_phylen = DOT11_RTS_LEN + FCS_LEN;

                brcms_c_compute_plcp(wlc, rts_rspec[0], rts_phylen, rts_plcp);

                /* fallback rate version of RTS PLCP header */
                brcms_c_compute_plcp(wlc, rts_rspec[1], rts_phylen,
                                 rts_plcp_fallback);
                memcpy(&txh->RTSPLCPFallback, rts_plcp_fallback,
                       sizeof(txh->RTSPLCPFallback));

                /* RTS frame fields... */
                rts = (struct ieee80211_rts *)&txh->rts_frame;

                durid = brcms_c_compute_rtscts_dur(wlc, use_cts, rts_rspec[0],
                                               rspec[0], rts_preamble_type[0],
                                               preamble_type[0], phylen, false);
                rts->duration = cpu_to_le16(durid);
                /* fallback rate version of RTS DUR field */
                durid = brcms_c_compute_rtscts_dur(wlc, use_cts,
                                               rts_rspec[1], rspec[1],
                                               rts_preamble_type[1],
                                               preamble_type[1], phylen, false);
                txh->RTSDurFallback = cpu_to_le16(durid);

                if (use_cts) {
                        rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
                                                         IEEE80211_STYPE_CTS);

                        memcpy(&rts->ra, &h->addr2, ETH_ALEN);
                } else {
                        rts->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
                                                         IEEE80211_STYPE_RTS);

                        memcpy(&rts->ra, &h->addr1, 2 * ETH_ALEN);
                }

                /* mainrate
                 *    low 8 bits: main frag rate/mcs,
                 *    high 8 bits: rts/cts rate/mcs
                 */
                mainrates |= (is_ofdm_rate(rts_rspec[0]) ?
                                D11A_PHY_HDR_GRATE(
                                        (struct ofdm_phy_hdr *) rts_plcp) :
                                rts_plcp[0]) << 8;
        } else {
                memset((char *)txh->RTSPhyHeader, 0, D11_PHY_HDR_LEN);
                memset((char *)&txh->rts_frame, 0,
                        sizeof(struct ieee80211_rts));
                memset((char *)txh->RTSPLCPFallback, 0,
                      sizeof(txh->RTSPLCPFallback));
                txh->RTSDurFallback = 0;
        }

#ifdef SUPPORT_40MHZ
        /* add null delimiter count */
        if ((tx_info->flags & IEEE80211_TX_CTL_AMPDU) && is_mcs_rate(rspec))
                txh->RTSPLCPFallback[AMPDU_FBR_NULL_DELIM] =
                   brcm_c_ampdu_null_delim_cnt(wlc->ampdu, scb, rspec, phylen);

#endif

        /*
         * Now that RTS/RTS FB preamble types are updated, write
         * the final value
         */
        txh->MacTxControlHigh = cpu_to_le16(mch);

        /*
         * MainRates (both the rts and frag plcp rates have
         * been calculated now)
         */
        txh->MainRates = cpu_to_le16(mainrates);

        /* XtraFrameTypes */
        xfts = frametype(rspec[1], wlc->mimoft);
        xfts |= (frametype(rts_rspec[0], wlc->mimoft) << XFTS_RTS_FT_SHIFT);
        xfts |= (frametype(rts_rspec[1], wlc->mimoft) << XFTS_FBRRTS_FT_SHIFT);
        xfts |= CHSPEC_CHANNEL(wlc_phy_chanspec_get(wlc->band->pi)) <<
                                                             XFTS_CHANNEL_SHIFT;
        txh->XtraFrameTypes = cpu_to_le16(xfts);

        /* PhyTxControlWord */
        phyctl = frametype(rspec[0], wlc->mimoft);
        if ((preamble_type[0] == BRCMS_SHORT_PREAMBLE) ||
            (preamble_type[0] == BRCMS_GF_PREAMBLE)) {
                if (rspec2rate(rspec[0]) != BRCM_RATE_1M)
                        phyctl |= PHY_TXC_SHORT_HDR;
        }

        /* phytxant is properly bit shifted */
        phyctl |= brcms_c_stf_d11hdrs_phyctl_txant(wlc, rspec[0]);
        txh->PhyTxControlWord = cpu_to_le16(phyctl);

        /* PhyTxControlWord_1 */
        if (BRCMS_PHY_11N_CAP(wlc->band)) {
                u16 phyctl1 = 0;

                phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[0]);
                txh->PhyTxControlWord_1 = cpu_to_le16(phyctl1);
                phyctl1 = brcms_c_phytxctl1_calc(wlc, rspec[1]);
                txh->PhyTxControlWord_1_Fbr = cpu_to_le16(phyctl1);

                if (use_rts || use_cts) {
                        phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[0]);
                        txh->PhyTxControlWord_1_Rts = cpu_to_le16(phyctl1);
                        phyctl1 = brcms_c_phytxctl1_calc(wlc, rts_rspec[1]);
                        txh->PhyTxControlWord_1_FbrRts = cpu_to_le16(phyctl1);
                }

                /*
                 * For mcs frames, if mixedmode(overloaded with long preamble)
                 * is going to be set, fill in non-zero MModeLen and/or
                 * MModeFbrLen it will be unnecessary if they are separated
                 */
                if (is_mcs_rate(rspec[0]) &&
                    (preamble_type[0] == BRCMS_MM_PREAMBLE)) {
                        u16 mmodelen =
                            brcms_c_calc_lsig_len(wlc, rspec[0], phylen);
                        txh->MModeLen = cpu_to_le16(mmodelen);
                }

                if (is_mcs_rate(rspec[1]) &&
                    (preamble_type[1] == BRCMS_MM_PREAMBLE)) {
                        u16 mmodefbrlen =
                            brcms_c_calc_lsig_len(wlc, rspec[1], phylen);
                        txh->MModeFbrLen = cpu_to_le16(mmodefbrlen);
                }
        }

        ac = skb_get_queue_mapping(p);
        if ((scb->flags & SCB_WMECAP) && qos && wlc->edcf_txop[ac]) {
                uint frag_dur, dur, dur_fallback;

                /* WME: Update TXOP threshold */
                if (!(tx_info->flags & IEEE80211_TX_CTL_AMPDU) && frag == 0) {
                        frag_dur =
                            brcms_c_calc_frame_time(wlc, rspec[0],
                                        preamble_type[0], phylen);

                        if (rts) {
                                /* 1 RTS or CTS-to-self frame */
                                dur =
                                    brcms_c_calc_cts_time(wlc, rts_rspec[0],
                                                      rts_preamble_type[0]);
                                dur_fallback =
                                    brcms_c_calc_cts_time(wlc, rts_rspec[1],
                                                      rts_preamble_type[1]);
                                /* (SIFS + CTS) + SIFS + frame + SIFS + ACK */
                                dur += le16_to_cpu(rts->duration);
                                dur_fallback +=
                                        le16_to_cpu(txh->RTSDurFallback);
                        } else if (use_rifs) {
                                dur = frag_dur;
                                dur_fallback = 0;
                        } else {
                                /* frame + SIFS + ACK */
                                dur = frag_dur;
                                dur +=
                                    brcms_c_compute_frame_dur(wlc, rspec[0],
                                                          preamble_type[0], 0);

                                dur_fallback =
                                    brcms_c_calc_frame_time(wlc, rspec[1],
                                                        preamble_type[1],
                                                        phylen);
                                dur_fallback +=
                                    brcms_c_compute_frame_dur(wlc, rspec[1],
                                                          preamble_type[1], 0);
                        }
                        /* NEED to set TxFesTimeNormal (hard) */
                        txh->TxFesTimeNormal = cpu_to_le16((u16) dur);
                        /*
                         * NEED to set fallback rate version of
                         * TxFesTimeNormal (hard)
                         */
                        txh->TxFesTimeFallback =
                                cpu_to_le16((u16) dur_fallback);

                        /*
                         * update txop byte threshold (txop minus intraframe
                         * overhead)
                         */
                        if (wlc->edcf_txop[ac] >= (dur - frag_dur)) {
                                uint newfragthresh;

                                newfragthresh =
                                    brcms_c_calc_frame_len(wlc,
                                        rspec[0], preamble_type[0],
                                        (wlc->edcf_txop[ac] -
                                                (dur - frag_dur)));
                                /* range bound the fragthreshold */
                                if (newfragthresh < DOT11_MIN_FRAG_LEN)
                                        newfragthresh =
                                            DOT11_MIN_FRAG_LEN;
                                else if (newfragthresh >
                                         wlc->usr_fragthresh)
                                        newfragthresh =
                                            wlc->usr_fragthresh;
                                /* update the fragthresh and do txc update */
                                if (wlc->fragthresh[queue] !=
                                    (u16) newfragthresh)
                                        wlc->fragthresh[queue] =
                                            (u16) newfragthresh;
                        } else {
                                brcms_err(wlc->hw->d11core,
                                          "wl%d: %s txop invalid "
                                          "for rate %d\n",
                                          wlc->pub->unit, fifo_names[queue],
                                          rspec2rate(rspec[0]));
                        }

                        if (dur > wlc->edcf_txop[ac])
                                brcms_err(wlc->hw->d11core,
                                          "wl%d: %s: %s txop "
                                          "exceeded phylen %d/%d dur %d/%d\n",
                                          wlc->pub->unit, __func__,
                                          fifo_names[queue],
                                          phylen, wlc->fragthresh[queue],
                                          dur, wlc->edcf_txop[ac]);
                }
        }

        return 0;
}

static int brcms_c_tx(struct brcms_c_info *wlc, struct sk_buff *skb)
{
        struct dma_pub *dma;
        int fifo, ret = -ENOSPC;
        struct d11txh *txh;
        u16 frameid = INVALIDFID;

        fifo = brcms_ac_to_fifo(skb_get_queue_mapping(skb));
        dma = wlc->hw->di[fifo];
        txh = (struct d11txh *)(skb->data);

        if (dma->txavail == 0) {
                /*
                 * We sometimes get a frame from mac80211 after stopping
                 * the queues. This only ever seems to be a single frame
                 * and is seems likely to be a race. TX_HEADROOM should
                 * ensure that we have enough space to handle these stray
                 * packets, so warn if there isn't. If we're out of space
                 * in the tx ring and the tx queue isn't stopped then
                 * we've really got a bug; warn loudly if that happens.
                 */
                brcms_warn(wlc->hw->d11core,
                           "Received frame for tx with no space in DMA ring\n");
                WARN_ON(!ieee80211_queue_stopped(wlc->pub->ieee_hw,
                                                 skb_get_queue_mapping(skb)));
                return -ENOSPC;
        }

        /* When a BC/MC frame is being committed to the BCMC fifo
         * via DMA (NOT PIO), update ucode or BSS info as appropriate.
         */
        if (fifo == TX_BCMC_FIFO)
                frameid = le16_to_cpu(txh->TxFrameID);

        /* Commit BCMC sequence number in the SHM frame ID location */
        if (frameid != INVALIDFID) {
                /*
                 * To inform the ucode of the last mcast frame posted
                 * so that it can clear moredata bit
                 */
                brcms_b_write_shm(wlc->hw, M_BCMC_FID, frameid);
        }

        ret = brcms_c_txfifo(wlc, fifo, skb);
        /*
         * The only reason for brcms_c_txfifo to fail is because
         * there weren't any DMA descriptors, but we've already
         * checked for that. So if it does fail yell loudly.
         */
        WARN_ON_ONCE(ret);

        return ret;
}

bool brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu,
                              struct ieee80211_hw *hw)
{
        uint fifo;
        struct scb *scb = &wlc->pri_scb;

        fifo = brcms_ac_to_fifo(skb_get_queue_mapping(sdu));
        brcms_c_d11hdrs_mac80211(wlc, hw, sdu, scb, 0, 1, fifo, 0);
        if (!brcms_c_tx(wlc, sdu))
                return true;

        /* packet discarded */
        dev_kfree_skb_any(sdu);
        return false;
}

int
brcms_c_txfifo(struct brcms_c_info *wlc, uint fifo, struct sk_buff *p)
{
        struct dma_pub *dma = wlc->hw->di[fifo];
        int ret;
        u16 queue;

        ret = dma_txfast(wlc, dma, p);
        if (ret < 0)
                wiphy_err(wlc->wiphy, "txfifo: fatal, toss frames !!!\n");

        /*
         * Stop queue if DMA ring is full. Reserve some free descriptors,
         * as we sometimes receive a frame from mac80211 after the queues
         * are stopped.
         */
        queue = skb_get_queue_mapping(p);
        if (dma->txavail <= TX_HEADROOM && fifo < TX_BCMC_FIFO &&
            !ieee80211_queue_stopped(wlc->pub->ieee_hw, queue))
                ieee80211_stop_queue(wlc->pub->ieee_hw, queue);

        return ret;
}

u32
brcms_c_rspec_to_rts_rspec(struct brcms_c_info *wlc, u32 rspec,
                           bool use_rspec, u16 mimo_ctlchbw)
{
        u32 rts_rspec = 0;

        if (use_rspec)
                /* use frame rate as rts rate */
                rts_rspec = rspec;
        else if (wlc->band->gmode && wlc->protection->_g && !is_cck_rate(rspec))
                /* Use 11Mbps as the g protection RTS target rate and fallback.
                 * Use the brcms_basic_rate() lookup to find the best basic rate
                 * under the target in case 11 Mbps is not Basic.
                 * 6 and 9 Mbps are not usually selected by rate selection, but
                 * even if the OFDM rate we are protecting is 6 or 9 Mbps, 11
                 * is more robust.
                 */
                rts_rspec = brcms_basic_rate(wlc, BRCM_RATE_11M);
        else
                /* calculate RTS rate and fallback rate based on the frame rate
                 * RTS must be sent at a basic rate since it is a
                 * control frame, sec 9.6 of 802.11 spec
                 */
                rts_rspec = brcms_basic_rate(wlc, rspec);

        if (BRCMS_PHY_11N_CAP(wlc->band)) {
                /* set rts txbw to correct side band */
                rts_rspec &= ~RSPEC_BW_MASK;

                /*
                 * if rspec/rspec_fallback is 40MHz, then send RTS on both
                 * 20MHz channel (DUP), otherwise send RTS on control channel
                 */
                if (rspec_is40mhz(rspec) && !is_cck_rate(rts_rspec))
                        rts_rspec |= (PHY_TXC1_BW_40MHZ_DUP << RSPEC_BW_SHIFT);
                else
                        rts_rspec |= (mimo_ctlchbw << RSPEC_BW_SHIFT);

                /* pick siso/cdd as default for ofdm */
                if (is_ofdm_rate(rts_rspec)) {
                        rts_rspec &= ~RSPEC_STF_MASK;
                        rts_rspec |= (wlc->stf->ss_opmode << RSPEC_STF_SHIFT);
                }
        }
        return rts_rspec;
}

/* Update beacon listen interval in shared memory */
static void brcms_c_bcn_li_upd(struct brcms_c_info *wlc)
{
        /* wake up every DTIM is the default */
        if (wlc->bcn_li_dtim == 1)
                brcms_b_write_shm(wlc->hw, M_BCN_LI, 0);
        else
                brcms_b_write_shm(wlc->hw, M_BCN_LI,
                              (wlc->bcn_li_dtim << 8) | wlc->bcn_li_bcn);
}

static void
brcms_b_read_tsf(struct brcms_hardware *wlc_hw, u32 *tsf_l_ptr,
                  u32 *tsf_h_ptr)
{
        struct bcma_device *core = wlc_hw->d11core;

        /* read the tsf timer low, then high to get an atomic read */
        *tsf_l_ptr = bcma_read32(core, D11REGOFFS(tsf_timerlow));
        *tsf_h_ptr = bcma_read32(core, D11REGOFFS(tsf_timerhigh));
}

/*
 * recover 64bit TSF value from the 16bit TSF value in the rx header
 * given the assumption that the TSF passed in header is within 65ms
 * of the current tsf.
 *
 * 6       5       4       4       3       2       1
 * 3.......6.......8.......0.......2.......4.......6.......8......0
 * |<---------- tsf_h ----------->||<--- tsf_l -->||<-RxTSFTime ->|
 *
 * The RxTSFTime are the lowest 16 bits and provided by the ucode. The
 * tsf_l is filled in by brcms_b_recv, which is done earlier in the
 * receive call sequence after rx interrupt. Only the higher 16 bits
 * are used. Finally, the tsf_h is read from the tsf register.
 */
static u64 brcms_c_recover_tsf64(struct brcms_c_info *wlc,
                                 struct d11rxhdr *rxh)
{
        u32 tsf_h, tsf_l;
        u16 rx_tsf_0_15, rx_tsf_16_31;

        brcms_b_read_tsf(wlc->hw, &tsf_l, &tsf_h);

        rx_tsf_16_31 = (u16)(tsf_l >> 16);
        rx_tsf_0_15 = rxh->RxTSFTime;

        /*
         * a greater tsf time indicates the low 16 bits of
         * tsf_l wrapped, so decrement the high 16 bits.
         */
        if ((u16)tsf_l < rx_tsf_0_15) {
                rx_tsf_16_31 -= 1;
                if (rx_tsf_16_31 == 0xffff)
                        tsf_h -= 1;
        }

        return ((u64)tsf_h << 32) | (((u32)rx_tsf_16_31 << 16) + rx_tsf_0_15);
}

static void
prep_mac80211_status(struct brcms_c_info *wlc, struct d11rxhdr *rxh,
                     struct sk_buff *p,
                     struct ieee80211_rx_status *rx_status)
{
        int preamble;
        int channel;
        u32 rspec;
        unsigned char *plcp;

        /* fill in TSF and flag its presence */
        rx_status->mactime = brcms_c_recover_tsf64(wlc, rxh);
        rx_status->flag |= RX_FLAG_MACTIME_START;

        channel = BRCMS_CHAN_CHANNEL(rxh->RxChan);

        rx_status->band =
                channel > 14 ? IEEE80211_BAND_5GHZ : IEEE80211_BAND_2GHZ;
        rx_status->freq =
                ieee80211_channel_to_frequency(channel, rx_status->band);

        rx_status->signal = wlc_phy_rssi_compute(wlc->hw->band->pi, rxh);

        /* noise */
        /* qual */
        rx_status->antenna =
                (rxh->PhyRxStatus_0 & PRXS0_RXANT_UPSUBBAND) ? 1 : 0;

        plcp = p->data;

        rspec = brcms_c_compute_rspec(rxh, plcp);
        if (is_mcs_rate(rspec)) {
                rx_status->rate_idx = rspec & RSPEC_RATE_MASK;
                rx_status->flag |= RX_FLAG_HT;
                if (rspec_is40mhz(rspec))
                        rx_status->flag |= RX_FLAG_40MHZ;
        } else {
                switch (rspec2rate(rspec)) {
                case BRCM_RATE_1M:
                        rx_status->rate_idx = 0;
                        break;
                case BRCM_RATE_2M:
                        rx_status->rate_idx = 1;
                        break;
                case BRCM_RATE_5M5:
                        rx_status->rate_idx = 2;
                        break;
                case BRCM_RATE_11M:
                        rx_status->rate_idx = 3;
                        break;
                case BRCM_RATE_6M:
                        rx_status->rate_idx = 4;
                        break;
                case BRCM_RATE_9M:
                        rx_status->rate_idx = 5;
                        break;
                case BRCM_RATE_12M:
                        rx_status->rate_idx = 6;
                        break;
                case BRCM_RATE_18M:
                        rx_status->rate_idx = 7;
                        break;
                case BRCM_RATE_24M:
                        rx_status->rate_idx = 8;
                        break;
                case BRCM_RATE_36M:
                        rx_status->rate_idx = 9;
                        break;
                case BRCM_RATE_48M:
                        rx_status->rate_idx = 10;
                        break;
                case BRCM_RATE_54M:
                        rx_status->rate_idx = 11;
                        break;
                default:
                        brcms_err(wlc->hw->d11core,
                                  "%s: Unknown rate\n", __func__);
                }

                /*
                 * For 5GHz, we should decrease the index as it is
                 * a subset of the 2.4G rates. See bitrates field
                 * of brcms_band_5GHz_nphy (in mac80211_if.c).
                 */
                if (rx_status->band == IEEE80211_BAND_5GHZ)
                        rx_status->rate_idx -= BRCMS_LEGACY_5G_RATE_OFFSET;

                /* Determine short preamble and rate_idx */
                preamble = 0;
                if (is_cck_rate(rspec)) {
                        if (rxh->PhyRxStatus_0 & PRXS0_SHORTH)
                                rx_status->flag |= RX_FLAG_SHORTPRE;
                } else if (is_ofdm_rate(rspec)) {
                        rx_status->flag |= RX_FLAG_SHORTPRE;
                } else {
                        brcms_err(wlc->hw->d11core, "%s: Unknown modulation\n",
                                  __func__);
                }
        }

        if (plcp3_issgi(plcp[3]))
                rx_status->flag |= RX_FLAG_SHORT_GI;

        if (rxh->RxStatus1 & RXS_DECERR) {
                rx_status->flag |= RX_FLAG_FAILED_PLCP_CRC;
                brcms_err(wlc->hw->d11core, "%s:  RX_FLAG_FAILED_PLCP_CRC\n",
                          __func__);
        }
        if (rxh->RxStatus1 & RXS_FCSERR) {
                rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
                brcms_err(wlc->hw->d11core, "%s:  RX_FLAG_FAILED_FCS_CRC\n",
                          __func__);
        }
}

static void
brcms_c_recvctl(struct brcms_c_info *wlc, struct d11rxhdr *rxh,
                struct sk_buff *p)
{
        int len_mpdu;
        struct ieee80211_rx_status rx_status;
        struct ieee80211_hdr *hdr;

        memset(&rx_status, 0, sizeof(rx_status));
        prep_mac80211_status(wlc, rxh, p, &rx_status);

        /* mac header+body length, exclude CRC and plcp header */
        len_mpdu = p->len - D11_PHY_HDR_LEN - FCS_LEN;
        skb_pull(p, D11_PHY_HDR_LEN);
        __skb_trim(p, len_mpdu);

        /* unmute transmit */
        if (wlc->hw->suspended_fifos) {
                hdr = (struct ieee80211_hdr *)p->data;
                if (ieee80211_is_beacon(hdr->frame_control))
                        brcms_b_mute(wlc->hw, false);
        }

        memcpy(IEEE80211_SKB_RXCB(p), &rx_status, sizeof(rx_status));
        ieee80211_rx_irqsafe(wlc->pub->ieee_hw, p);
}

/* calculate frame duration for Mixed-mode L-SIG spoofing, return
 * number of bytes goes in the length field
 *
 * Formula given by HT PHY Spec v 1.13
 *   len = 3(nsyms + nstream + 3) - 3
 */
u16
brcms_c_calc_lsig_len(struct brcms_c_info *wlc, u32 ratespec,
                      uint mac_len)
{
        uint nsyms, len = 0, kNdps;

        if (is_mcs_rate(ratespec)) {
                uint mcs = ratespec & RSPEC_RATE_MASK;
                int tot_streams = (mcs_2_txstreams(mcs) + 1) +
                                  rspec_stc(ratespec);

                /*
                 * the payload duration calculation matches that
                 * of regular ofdm
                 */
                /* 1000Ndbps = kbps * 4 */
                kNdps = mcs_2_rate(mcs, rspec_is40mhz(ratespec),
                                   rspec_issgi(ratespec)) * 4;

                if (rspec_stc(ratespec) == 0)
                        nsyms =
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, kNdps);
                else
                        /* STBC needs to have even number of symbols */
                        nsyms =
                            2 *
                            CEIL((APHY_SERVICE_NBITS + 8 * mac_len +
                                  APHY_TAIL_NBITS) * 1000, 2 * kNdps);

                /* (+3) account for HT-SIG(2) and HT-STF(1) */
                nsyms += (tot_streams + 3);
                /*
                 * 3 bytes/symbol @ legacy 6Mbps rate
                 * (-3) excluding service bits and tail bits
                 */
                len = (3 * nsyms) - 3;
        }

        return (u16) len;
}

static void
brcms_c_mod_prb_rsp_rate_table(struct brcms_c_info *wlc, uint frame_len)
{
        const struct brcms_c_rateset *rs_dflt;
        struct brcms_c_rateset rs;
        u8 rate;
        u16 entry_ptr;
        u8 plcp[D11_PHY_HDR_LEN];
        u16 dur, sifs;
        uint i;

        sifs = get_sifs(wlc->band);

        rs_dflt = brcms_c_rateset_get_hwrs(wlc);

        brcms_c_rateset_copy(rs_dflt, &rs);
        brcms_c_rateset_mcs_upd(&rs, wlc->stf->txstreams);

        /*
         * walk the phy rate table and update MAC core SHM
         * basic rate table entries
         */
        for (i = 0; i < rs.count; i++) {
                rate = rs.rates[i] & BRCMS_RATE_MASK;

                entry_ptr = brcms_b_rate_shm_offset(wlc->hw, rate);

                /* Calculate the Probe Response PLCP for the given rate */
                brcms_c_compute_plcp(wlc, rate, frame_len, plcp);

                /*
                 * Calculate the duration of the Probe Response
                 * frame plus SIFS for the MAC
                 */
                dur = (u16) brcms_c_calc_frame_time(wlc, rate,
                                                BRCMS_LONG_PREAMBLE, frame_len);
                dur += sifs;

                /* Update the SHM Rate Table entry Probe Response values */
                brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_PLCP_POS,
                              (u16) (plcp[0] + (plcp[1] << 8)));
                brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_PLCP_POS + 2,
                              (u16) (plcp[2] + (plcp[3] << 8)));
                brcms_b_write_shm(wlc->hw, entry_ptr + M_RT_PRS_DUR_POS, dur);
        }
}

/*      Max buffering needed for beacon template/prb resp template is 142 bytes.
 *
 *      PLCP header is 6 bytes.
 *      802.11 A3 header is 24 bytes.
 *      Max beacon frame body template length is 112 bytes.
 *      Max probe resp frame body template length is 110 bytes.
 *
 *      *len on input contains the max length of the packet available.
 *
 *      The *len value is set to the number of bytes in buf used, and starts
 *      with the PLCP and included up to, but not including, the 4 byte FCS.
 */
static void
brcms_c_bcn_prb_template(struct brcms_c_info *wlc, u16 type,
                         u32 bcn_rspec,
                         struct brcms_bss_cfg *cfg, u16 *buf, int *len)
{
        static const u8 ether_bcast[ETH_ALEN] = {255, 255, 255, 255, 255, 255};
        struct cck_phy_hdr *plcp;
        struct ieee80211_mgmt *h;
        int hdr_len, body_len;

        hdr_len = D11_PHY_HDR_LEN + DOT11_MAC_HDR_LEN;

        /* calc buffer size provided for frame body */
        body_len = *len - hdr_len;
        /* return actual size */
        *len = hdr_len + body_len;

        /* format PHY and MAC headers */
        memset((char *)buf, 0, hdr_len);

        plcp = (struct cck_phy_hdr *) buf;

        /*
         * PLCP for Probe Response frames are filled in from
         * core's rate table
         */
        if (type == IEEE80211_STYPE_BEACON)
                /* fill in PLCP */
                brcms_c_compute_plcp(wlc, bcn_rspec,
                                 (DOT11_MAC_HDR_LEN + body_len + FCS_LEN),
                                 (u8 *) plcp);

        /* "Regular" and 16 MBSS but not for 4 MBSS */
        /* Update the phytxctl for the beacon based on the rspec */
        brcms_c_beacon_phytxctl_txant_upd(wlc, bcn_rspec);

        h = (struct ieee80211_mgmt *)&plcp[1];

        /* fill in 802.11 header */
        h->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | type);

        /* DUR is 0 for multicast bcn, or filled in by MAC for prb resp */
        /* A1 filled in by MAC for prb resp, broadcast for bcn */
        if (type == IEEE80211_STYPE_BEACON)
                memcpy(&h->da, &ether_bcast, ETH_ALEN);
        memcpy(&h->sa, &cfg->cur_etheraddr, ETH_ALEN);
        memcpy(&h->bssid, &cfg->BSSID, ETH_ALEN);

        /* SEQ filled in by MAC */
}

int brcms_c_get_header_len(void)
{
        return TXOFF;
}

/*
 * Update all beacons for the system.
 */
void brcms_c_update_beacon(struct brcms_c_info *wlc)
{
        struct brcms_bss_cfg *bsscfg = wlc->bsscfg;

        if (bsscfg->up && !bsscfg->BSS)
                /* Clear the soft intmask */
                wlc->defmacintmask &= ~MI_BCNTPL;
}

/* Write ssid into shared memory */
static void
brcms_c_shm_ssid_upd(struct brcms_c_info *wlc, struct brcms_bss_cfg *cfg)
{
        u8 *ssidptr = cfg->SSID;
        u16 base = M_SSID;
        u8 ssidbuf[IEEE80211_MAX_SSID_LEN];

        /* padding the ssid with zero and copy it into shm */
        memset(ssidbuf, 0, IEEE80211_MAX_SSID_LEN);
        memcpy(ssidbuf, ssidptr, cfg->SSID_len);

        brcms_c_copyto_shm(wlc, base, ssidbuf, IEEE80211_MAX_SSID_LEN);
        brcms_b_write_shm(wlc->hw, M_SSIDLEN, (u16) cfg->SSID_len);
}

static void
brcms_c_bss_update_probe_resp(struct brcms_c_info *wlc,
                              struct brcms_bss_cfg *cfg,
                              bool suspend)
{
        u16 prb_resp[BCN_TMPL_LEN / 2];
        int len = BCN_TMPL_LEN;

        /*
         * write the probe response to hardware, or save in
         * the config structure
         */

        /* create the probe response template */
        brcms_c_bcn_prb_template(wlc, IEEE80211_STYPE_PROBE_RESP, 0,
                                 cfg, prb_resp, &len);

        if (suspend)
                brcms_c_suspend_mac_and_wait(wlc);

        /* write the probe response into the template region */
        brcms_b_write_template_ram(wlc->hw, T_PRS_TPL_BASE,
                                    (len + 3) & ~3, prb_resp);

        /* write the length of the probe response frame (+PLCP/-FCS) */
        brcms_b_write_shm(wlc->hw, M_PRB_RESP_FRM_LEN, (u16) len);

        /* write the SSID and SSID length */
        brcms_c_shm_ssid_upd(wlc, cfg);

        /*
         * Write PLCP headers and durations for probe response frames
         * at all rates. Use the actual frame length covered by the
         * PLCP header for the call to brcms_c_mod_prb_rsp_rate_table()
         * by subtracting the PLCP len and adding the FCS.
         */
        len += (-D11_PHY_HDR_LEN + FCS_LEN);
        brcms_c_mod_prb_rsp_rate_table(wlc, (u16) len);

        if (suspend)
                brcms_c_enable_mac(wlc);
}

void brcms_c_update_probe_resp(struct brcms_c_info *wlc, bool suspend)
{
        struct brcms_bss_cfg *bsscfg = wlc->bsscfg;

        /* update AP or IBSS probe responses */
        if (bsscfg->up && !bsscfg->BSS)
                brcms_c_bss_update_probe_resp(wlc, bsscfg, suspend);
}

int brcms_b_xmtfifo_sz_get(struct brcms_hardware *wlc_hw, uint fifo,
                           uint *blocks)
{
        if (fifo >= NFIFO)
                return -EINVAL;

        *blocks = wlc_hw->xmtfifo_sz[fifo];

        return 0;
}

void
brcms_c_set_addrmatch(struct brcms_c_info *wlc, int match_reg_offset,
                  const u8 *addr)
{
        brcms_b_set_addrmatch(wlc->hw, match_reg_offset, addr);
        if (match_reg_offset == RCM_BSSID_OFFSET)
                memcpy(wlc->bsscfg->BSSID, addr, ETH_ALEN);
}

/*
 * Flag 'scan in progress' to withhold dynamic phy calibration
 */
void brcms_c_scan_start(struct brcms_c_info *wlc)
{
        wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, true);
}

void brcms_c_scan_stop(struct brcms_c_info *wlc)
{
        wlc_phy_hold_upd(wlc->band->pi, PHY_HOLD_FOR_SCAN, false);
}

void brcms_c_associate_upd(struct brcms_c_info *wlc, bool state)
{
        wlc->pub->associated = state;
        wlc->bsscfg->associated = state;
}

/*
 * When a remote STA/AP is removed by Mac80211, or when it can no longer accept
 * AMPDU traffic, packets pending in hardware have to be invalidated so that
 * when later on hardware releases them, they can be handled appropriately.
 */
void brcms_c_inval_dma_pkts(struct brcms_hardware *hw,
                               struct ieee80211_sta *sta,
                               void (*dma_callback_fn))
{
        struct dma_pub *dmah;
        int i;
        for (i = 0; i < NFIFO; i++) {
                dmah = hw->di[i];
                if (dmah != NULL)
                        dma_walk_packets(dmah, dma_callback_fn, sta);
        }
}

int brcms_c_get_curband(struct brcms_c_info *wlc)
{
        return wlc->band->bandunit;
}

void brcms_c_wait_for_tx_completion(struct brcms_c_info *wlc, bool drop)
{
        int timeout = 20;
        int i;

        /* Kick DMA to send any pending AMPDU */
        for (i = 0; i < ARRAY_SIZE(wlc->hw->di); i++)
                if (wlc->hw->di[i])
                        dma_txflush(wlc->hw->di[i]);

        /* wait for queue and DMA fifos to run dry */
        while (brcms_txpktpendtot(wlc) > 0) {
                brcms_msleep(wlc->wl, 1);

                if (--timeout == 0)
                        break;
        }

        WARN_ON_ONCE(timeout == 0);
}

void brcms_c_set_beacon_listen_interval(struct brcms_c_info *wlc, u8 interval)
{
        wlc->bcn_li_bcn = interval;
        if (wlc->pub->up)
                brcms_c_bcn_li_upd(wlc);
}

int brcms_c_set_tx_power(struct brcms_c_info *wlc, int txpwr)
{
        uint qdbm;

        /* Remove override bit and clip to max qdbm value */
        qdbm = min_t(uint, txpwr * BRCMS_TXPWR_DB_FACTOR, 0xff);
        return wlc_phy_txpower_set(wlc->band->pi, qdbm, false);
}

int brcms_c_get_tx_power(struct brcms_c_info *wlc)
{
        uint qdbm;
        bool override;

        wlc_phy_txpower_get(wlc->band->pi, &qdbm, &override);

        /* Return qdbm units */
        return (int)(qdbm / BRCMS_TXPWR_DB_FACTOR);
}

/* Process received frames */
/*
 * Return true if more frames need to be processed. false otherwise.
 * Param 'bound' indicates max. # frames to process before break out.
 */
static void brcms_c_recv(struct brcms_c_info *wlc, struct sk_buff *p)
{
        struct d11rxhdr *rxh;
        struct ieee80211_hdr *h;
        uint len;
        bool is_amsdu;

        /* frame starts with rxhdr */
        rxh = (struct d11rxhdr *) (p->data);

        /* strip off rxhdr */
        skb_pull(p, BRCMS_HWRXOFF);

        /* MAC inserts 2 pad bytes for a4 headers or QoS or A-MSDU subframes */
        if (rxh->RxStatus1 & RXS_PBPRES) {
                if (p->len < 2) {
                        brcms_err(wlc->hw->d11core,
                                  "wl%d: recv: rcvd runt of len %d\n",
                                  wlc->pub->unit, p->len);
                        goto toss;
                }
                skb_pull(p, 2);
        }

        h = (struct ieee80211_hdr *)(p->data + D11_PHY_HDR_LEN);
        len = p->len;

        if (rxh->RxStatus1 & RXS_FCSERR) {
                if (!(wlc->filter_flags & FIF_FCSFAIL))
                        goto toss;
        }

        /* check received pkt has at least frame control field */
        if (len < D11_PHY_HDR_LEN + sizeof(h->frame_control))
                goto toss;

        /* not supporting A-MSDU */
        is_amsdu = rxh->RxStatus2 & RXS_AMSDU_MASK;
        if (is_amsdu)
                goto toss;

        brcms_c_recvctl(wlc, rxh, p);
        return;

 toss:
        brcmu_pkt_buf_free_skb(p);
}

/* Process received frames */
/*
 * Return true if more frames need to be processed. false otherwise.
 * Param 'bound' indicates max. # frames to process before break out.
 */
static bool
brcms_b_recv(struct brcms_hardware *wlc_hw, uint fifo, bool bound)
{
        struct sk_buff *p;
        struct sk_buff *next = NULL;
        struct sk_buff_head recv_frames;

        uint n = 0;
        uint bound_limit = bound ? RXBND : -1;
        bool morepending;

        skb_queue_head_init(&recv_frames);

        /* gather received frames */
        do {
                /* !give others some time to run! */
                if (n >= bound_limit)
                        break;

                morepending = dma_rx(wlc_hw->di[fifo], &recv_frames);
                n++;
        } while (morepending);

        /* post more rbufs */
        dma_rxfill(wlc_hw->di[fifo]);

        /* process each frame */
        skb_queue_walk_safe(&recv_frames, p, next) {
                struct d11rxhdr_le *rxh_le;
                struct d11rxhdr *rxh;

                skb_unlink(p, &recv_frames);
                rxh_le = (struct d11rxhdr_le *)p->data;
                rxh = (struct d11rxhdr *)p->data;

                /* fixup rx header endianness */
                rxh->RxFrameSize = le16_to_cpu(rxh_le->RxFrameSize);
                rxh->PhyRxStatus_0 = le16_to_cpu(rxh_le->PhyRxStatus_0);
                rxh->PhyRxStatus_1 = le16_to_cpu(rxh_le->PhyRxStatus_1);
                rxh->PhyRxStatus_2 = le16_to_cpu(rxh_le->PhyRxStatus_2);
                rxh->PhyRxStatus_3 = le16_to_cpu(rxh_le->PhyRxStatus_3);
                rxh->PhyRxStatus_4 = le16_to_cpu(rxh_le->PhyRxStatus_4);
                rxh->PhyRxStatus_5 = le16_to_cpu(rxh_le->PhyRxStatus_5);
                rxh->RxStatus1 = le16_to_cpu(rxh_le->RxStatus1);
                rxh->RxStatus2 = le16_to_cpu(rxh_le->RxStatus2);
                rxh->RxTSFTime = le16_to_cpu(rxh_le->RxTSFTime);
                rxh->RxChan = le16_to_cpu(rxh_le->RxChan);

                brcms_c_recv(wlc_hw->wlc, p);
        }

        return morepending;
}

/* second-level interrupt processing
 *   Return true if another dpc needs to be re-scheduled. false otherwise.
 *   Param 'bounded' indicates if applicable loops should be bounded.
 */
bool brcms_c_dpc(struct brcms_c_info *wlc, bool bounded)
{
        u32 macintstatus;
        struct brcms_hardware *wlc_hw = wlc->hw;
        struct bcma_device *core = wlc_hw->d11core;

        if (brcms_deviceremoved(wlc)) {
                brcms_err(core, "wl%d: %s: dead chip\n", wlc_hw->unit,
                          __func__);
                brcms_down(wlc->wl);
                return false;
        }

        /* grab and clear the saved software intstatus bits */
        macintstatus = wlc->macintstatus;
        wlc->macintstatus = 0;

        brcms_dbg_int(core, "wl%d: macintstatus 0x%x\n",
                      wlc_hw->unit, macintstatus);

        WARN_ON(macintstatus & MI_PRQ); /* PRQ Interrupt in non-MBSS */

        /* tx status */
        if (macintstatus & MI_TFS) {
                bool fatal;
                if (brcms_b_txstatus(wlc->hw, bounded, &fatal))
                        wlc->macintstatus |= MI_TFS;
                if (fatal) {
                        brcms_err(core, "MI_TFS: fatal\n");
                        goto fatal;
                }
        }

        if (macintstatus & (MI_TBTT | MI_DTIM_TBTT))
                brcms_c_tbtt(wlc);

        /* ATIM window end */
        if (macintstatus & MI_ATIMWINEND) {
                brcms_dbg_info(core, "end of ATIM window\n");
                bcma_set32(core, D11REGOFFS(maccommand), wlc->qvalid);
                wlc->qvalid = 0;
        }

        /*
         * received data or control frame, MI_DMAINT is
         * indication of RX_FIFO interrupt
         */
        if (macintstatus & MI_DMAINT)
                if (brcms_b_recv(wlc_hw, RX_FIFO, bounded))
                        wlc->macintstatus |= MI_DMAINT;

        /* noise sample collected */
        if (macintstatus & MI_BG_NOISE)
                wlc_phy_noise_sample_intr(wlc_hw->band->pi);

        if (macintstatus & MI_GP0) {
                brcms_err(core, "wl%d: PSM microcode watchdog fired at %d "
                          "(seconds). Resetting.\n", wlc_hw->unit, wlc_hw->now);

                printk_once("%s : PSM Watchdog, chipid 0x%x, chiprev 0x%x\n",
                            __func__, ai_get_chip_id(wlc_hw->sih),
                            ai_get_chiprev(wlc_hw->sih));
                brcms_fatal_error(wlc_hw->wlc->wl);
        }

        /* gptimer timeout */
        if (macintstatus & MI_TO)
                bcma_write32(core, D11REGOFFS(gptimer), 0);

        if (macintstatus & MI_RFDISABLE) {
                brcms_dbg_info(core, "wl%d: BMAC Detected a change on the"
                               " RF Disable Input\n", wlc_hw->unit);
                brcms_rfkill_set_hw_state(wlc->wl);
        }

        /* it isn't done and needs to be resched if macintstatus is non-zero */
        return wlc->macintstatus != 0;

 fatal:
        brcms_fatal_error(wlc_hw->wlc->wl);
        return wlc->macintstatus != 0;
}

void brcms_c_init(struct brcms_c_info *wlc, bool mute_tx)
{
        struct bcma_device *core = wlc->hw->d11core;
        struct ieee80211_channel *ch = wlc->pub->ieee_hw->conf.channel;
        u16 chanspec;

        brcms_dbg_info(core, "wl%d\n", wlc->pub->unit);

        chanspec = ch20mhz_chspec(ch->hw_value);

        brcms_b_init(wlc->hw, chanspec);

        /* update beacon listen interval */
        brcms_c_bcn_li_upd(wlc);

        /* write ethernet address to core */
        brcms_c_set_mac(wlc->bsscfg);
        brcms_c_set_bssid(wlc->bsscfg);

        /* Update tsf_cfprep if associated and up */
        if (wlc->pub->associated && wlc->bsscfg->up) {
                u32 bi;

                /* get beacon period and convert to uS */
                bi = wlc->bsscfg->current_bss->beacon_period << 10;
                /*
                 * update since init path would reset
                 * to default value
                 */
                bcma_write32(core, D11REGOFFS(tsf_cfprep),
                             bi << CFPREP_CBI_SHIFT);

                /* Update maccontrol PM related bits */
                brcms_c_set_ps_ctrl(wlc);
        }

        brcms_c_bandinit_ordered(wlc, chanspec);

        /* init probe response timeout */
        brcms_b_write_shm(wlc->hw, M_PRS_MAXTIME, wlc->prb_resp_timeout);

        /* init max burst txop (framebursting) */
        brcms_b_write_shm(wlc->hw, M_MBURST_TXOP,
                      (wlc->
                       _rifs ? (EDCF_AC_VO_TXOP_AP << 5) : MAXFRAMEBURST_TXOP));

        /* initialize maximum allowed duty cycle */
        brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_ofdm, true, true);
        brcms_c_duty_cycle_set(wlc, wlc->tx_duty_cycle_cck, false, true);

        /*
         * Update some shared memory locations related to
         * max AMPDU size allowed to received
         */
        brcms_c_ampdu_shm_upd(wlc->ampdu);

        /* band-specific inits */
        brcms_c_bsinit(wlc);

        /* Enable EDCF mode (while the MAC is suspended) */
        bcma_set16(core, D11REGOFFS(ifs_ctl), IFS_USEEDCF);
        brcms_c_edcf_setparams(wlc, false);

        /* read the ucode version if we have not yet done so */
        if (wlc->ucode_rev == 0) {
                wlc->ucode_rev =
                    brcms_b_read_shm(wlc->hw, M_BOM_REV_MAJOR) << NBITS(u16);
                wlc->ucode_rev |= brcms_b_read_shm(wlc->hw, M_BOM_REV_MINOR);
        }

        /* ..now really unleash hell (allow the MAC out of suspend) */
        brcms_c_enable_mac(wlc);

        /* suspend the tx fifos and mute the phy for preism cac time */
        if (mute_tx)
                brcms_b_mute(wlc->hw, true);

        /* enable the RF Disable Delay timer */
        bcma_write32(core, D11REGOFFS(rfdisabledly), RFDISABLE_DEFAULT);

        /*
         * Initialize WME parameters; if they haven't been set by some other
         * mechanism (IOVar, etc) then read them from the hardware.
         */
        if (GFIELD(wlc->wme_retries[0], EDCF_SHORT) == 0) {
                /* Uninitialized; read from HW */
                int ac;

                for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
                        wlc->wme_retries[ac] =
                            brcms_b_read_shm(wlc->hw, M_AC_TXLMT_ADDR(ac));
        }
}

/*
 * The common driver entry routine. Error codes should be unique
 */
struct brcms_c_info *
brcms_c_attach(struct brcms_info *wl, struct bcma_device *core, uint unit,
               bool piomode, uint *perr)
{
        struct brcms_c_info *wlc;
        uint err = 0;
        uint i, j;
        struct brcms_pub *pub;

        /* allocate struct brcms_c_info state and its substructures */
        wlc = brcms_c_attach_malloc(unit, &err, 0);
        if (wlc == NULL)
                goto fail;
        wlc->wiphy = wl->wiphy;
        pub = wlc->pub;

#if defined(DEBUG)
        wlc_info_dbg = wlc;
#endif

        wlc->band = wlc->bandstate[0];
        wlc->core = wlc->corestate;
        wlc->wl = wl;
        pub->unit = unit;
        pub->_piomode = piomode;
        wlc->bandinit_pending = false;

        /* populate struct brcms_c_info with default values  */
        brcms_c_info_init(wlc, unit);

        /* update sta/ap related parameters */
        brcms_c_ap_upd(wlc);

        /*
         * low level attach steps(all hw accesses go
         * inside, no more in rest of the attach)
         */
        err = brcms_b_attach(wlc, core, unit, piomode);
        if (err)
                goto fail;

        brcms_c_protection_upd(wlc, BRCMS_PROT_N_PAM_OVR, OFF);

        pub->phy_11ncapable = BRCMS_PHY_11N_CAP(wlc->band);

        /* disable allowed duty cycle */
        wlc->tx_duty_cycle_ofdm = 0;
        wlc->tx_duty_cycle_cck = 0;

        brcms_c_stf_phy_chain_calc(wlc);

        /* txchain 1: txant 0, txchain 2: txant 1 */
        if (BRCMS_ISNPHY(wlc->band) && (wlc->stf->txstreams == 1))
                wlc->stf->txant = wlc->stf->hw_txchain - 1;

        /* push to BMAC driver */
        wlc_phy_stf_chain_init(wlc->band->pi, wlc->stf->hw_txchain,
                               wlc->stf->hw_rxchain);

        /* pull up some info resulting from the low attach */
        for (i = 0; i < NFIFO; i++)
                wlc->core->txavail[i] = wlc->hw->txavail[i];

        memcpy(&wlc->perm_etheraddr, &wlc->hw->etheraddr, ETH_ALEN);
        memcpy(&pub->cur_etheraddr, &wlc->hw->etheraddr, ETH_ALEN);

        for (j = 0; j < wlc->pub->_nbands; j++) {
                wlc->band = wlc->bandstate[j];

                if (!brcms_c_attach_stf_ant_init(wlc)) {
                        err = 24;
                        goto fail;
                }

                /* default contention windows size limits */
                wlc->band->CWmin = APHY_CWMIN;
                wlc->band->CWmax = PHY_CWMAX;

                /* init gmode value */
                if (wlc->band->bandtype == BRCM_BAND_2G) {
                        wlc->band->gmode = GMODE_AUTO;
                        brcms_c_protection_upd(wlc, BRCMS_PROT_G_USER,
                                           wlc->band->gmode);
                }

                /* init _n_enab supported mode */
                if (BRCMS_PHY_11N_CAP(wlc->band)) {
                        pub->_n_enab = SUPPORT_11N;
                        brcms_c_protection_upd(wlc, BRCMS_PROT_N_USER,
                                                   ((pub->_n_enab ==
                                                     SUPPORT_11N) ? WL_11N_2x2 :
                                                    WL_11N_3x3));
                }

                /* init per-band default rateset, depend on band->gmode */
                brcms_default_rateset(wlc, &wlc->band->defrateset);

                /* fill in hw_rateset */
                brcms_c_rateset_filter(&wlc->band->defrateset,
                                   &wlc->band->hw_rateset, false,
                                   BRCMS_RATES_CCK_OFDM, BRCMS_RATE_MASK,
                                   (bool) (wlc->pub->_n_enab & SUPPORT_11N));
        }

        /*
         * update antenna config due to
         * wlc->stf->txant/txchain/ant_rx_ovr change
         */
        brcms_c_stf_phy_txant_upd(wlc);

        /* attach each modules */
        err = brcms_c_attach_module(wlc);
        if (err != 0)
                goto fail;

        if (!brcms_c_timers_init(wlc, unit)) {
                wiphy_err(wl->wiphy, "wl%d: %s: init_timer failed\n", unit,
                          __func__);
                err = 32;
                goto fail;
        }

        /* depend on rateset, gmode */
        wlc->cmi = brcms_c_channel_mgr_attach(wlc);
        if (!wlc->cmi) {
                wiphy_err(wl->wiphy, "wl%d: %s: channel_mgr_attach failed"
                          "\n", unit, __func__);
                err = 33;
                goto fail;
        }

        /* init default when all parameters are ready, i.e. ->rateset */
        brcms_c_bss_default_init(wlc);

        /*
         * Complete the wlc default state initializations..
         */

        wlc->bsscfg->wlc = wlc;

        wlc->mimoft = FT_HT;
        wlc->mimo_40txbw = AUTO;
        wlc->ofdm_40txbw = AUTO;
        wlc->cck_40txbw = AUTO;
        brcms_c_update_mimo_band_bwcap(wlc, BRCMS_N_BW_20IN2G_40IN5G);

        /* Set default values of SGI */
        if (BRCMS_SGI_CAP_PHY(wlc)) {
                brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 |
                                               BRCMS_N_SGI_40));
        } else if (BRCMS_ISSSLPNPHY(wlc->band)) {
                brcms_c_ht_update_sgi_rx(wlc, (BRCMS_N_SGI_20 |
                                               BRCMS_N_SGI_40));
        } else {
                brcms_c_ht_update_sgi_rx(wlc, 0);
        }

        brcms_b_antsel_set(wlc->hw, wlc->asi->antsel_avail);

        if (perr)
                *perr = 0;

        return wlc;

 fail:
        wiphy_err(wl->wiphy, "wl%d: %s: failed with err %d\n",
                  unit, __func__, err);
        if (wlc)
                brcms_c_detach(wlc);

        if (perr)
                *perr = err;
        return NULL;
}