drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c

   1 /*
   2  * Copyright (c) 2010 Broadcom Corporation
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  11  * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
  13  * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
  14  * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  18
  19 #include <linux/types.h>
  20 #include <linux/kernel.h>
  21 #include <linux/kthread.h>
  22 #include <linux/printk.h>
  23 #include <linux/pci_ids.h>
  24 #include <linux/netdevice.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/sched.h>
  27 #include <linux/mmc/sdio.h>
  28 #include <linux/mmc/sdio_func.h>
  29 #include <linux/mmc/card.h>
  30 #include <linux/semaphore.h>
  31 #include <linux/firmware.h>
  32 #include <linux/module.h>
  33 #include <linux/bcma/bcma.h>
  34 #include <linux/debugfs.h>
  35 #include <linux/vmalloc.h>
  36 #include <asm/unaligned.h>
  37 #include <defs.h>
  38 #include <brcmu_wifi.h>
  39 #include <brcmu_utils.h>
  40 #include <brcm_hw_ids.h>
  41 #include <soc.h>
  42 #include "sdio_host.h"
  43 #include "sdio_chip.h"
  44
  45 #define DCMD_RESP_TIMEOUT  2000 /* In milli second */
  46
  47 #ifdef DEBUG
  48
  49 #define BRCMF_TRAP_INFO_SIZE    80
  50
  51 #define CBUF_LEN        (128)
  52
  53 /* Device console log buffer state */
  54 #define CONSOLE_BUFFER_MAX      2024
  55
  56 struct rte_log_le {
  57         __le32 buf;             /* Can't be pointer on (64-bit) hosts */
  58         __le32 buf_size;
  59         __le32 idx;
  60         char *_buf_compat;      /* Redundant pointer for backward compat. */
  61 };
  62
  63 struct rte_console {
  64         /* Virtual UART
  65          * When there is no UART (e.g. Quickturn),
  66          * the host should write a complete
  67          * input line directly into cbuf and then write
  68          * the length into vcons_in.
  69          * This may also be used when there is a real UART
  70          * (at risk of conflicting with
  71          * the real UART).  vcons_out is currently unused.
  72          */
  73         uint vcons_in;
  74         uint vcons_out;
  75
  76         /* Output (logging) buffer
  77          * Console output is written to a ring buffer log_buf at index log_idx.
  78          * The host may read the output when it sees log_idx advance.
  79          * Output will be lost if the output wraps around faster than the host
  80          * polls.
  81          */
  82         struct rte_log_le log_le;
  83
  84         /* Console input line buffer
  85          * Characters are read one at a time into cbuf
  86          * until <CR> is received, then
  87          * the buffer is processed as a command line.
  88          * Also used for virtual UART.
  89          */
  90         uint cbuf_idx;
  91         char cbuf[CBUF_LEN];
  92 };
  93
  94 #endif                          /* DEBUG */
  95 #include <chipcommon.h>
  96
  97 #include "dhd_bus.h"
  98 #include "dhd_dbg.h"
  99
 100 #define TXQLEN          2048    /* bulk tx queue length */
 101 #define TXHI            (TXQLEN - 256)  /* turn on flow control above TXHI */
 102 #define TXLOW           (TXHI - 256)    /* turn off flow control below TXLOW */
 103 #define PRIOMASK        7
 104
 105 #define TXRETRIES       2       /* # of retries for tx frames */
 106
 107 #define BRCMF_RXBOUND   50      /* Default for max rx frames in
 108                                  one scheduling */
 109
 110 #define BRCMF_TXBOUND   20      /* Default for max tx frames in
 111                                  one scheduling */
 112
 113 #define BRCMF_TXMINMAX  1       /* Max tx frames if rx still pending */
 114
 115 #define MEMBLOCK        2048    /* Block size used for downloading
 116                                  of dongle image */
 117 #define MAX_DATA_BUF    (32 * 1024)     /* Must be large enough to hold
 118                                  biggest possible glom */
 119
 120 #define BRCMF_FIRSTREAD (1 << 6)
 121
 122
 123 /* SBSDIO_DEVICE_CTL */
 124
 125 /* 1: device will assert busy signal when receiving CMD53 */
 126 #define SBSDIO_DEVCTL_SETBUSY           0x01
 127 /* 1: assertion of sdio interrupt is synchronous to the sdio clock */
 128 #define SBSDIO_DEVCTL_SPI_INTR_SYNC     0x02
 129 /* 1: mask all interrupts to host except the chipActive (rev 8) */
 130 #define SBSDIO_DEVCTL_CA_INT_ONLY       0x04
 131 /* 1: isolate internal sdio signals, put external pads in tri-state; requires
 132  * sdio bus power cycle to clear (rev 9) */
 133 #define SBSDIO_DEVCTL_PADS_ISO          0x08
 134 /* Force SD->SB reset mapping (rev 11) */
 135 #define SBSDIO_DEVCTL_SB_RST_CTL        0x30
 136 /*   Determined by CoreControl bit */
 137 #define SBSDIO_DEVCTL_RST_CORECTL       0x00
 138 /*   Force backplane reset */
 139 #define SBSDIO_DEVCTL_RST_BPRESET       0x10
 140 /*   Force no backplane reset */
 141 #define SBSDIO_DEVCTL_RST_NOBPRESET     0x20
 142
 143 /* direct(mapped) cis space */
 144
 145 /* MAPPED common CIS address */
 146 #define SBSDIO_CIS_BASE_COMMON          0x1000
 147 /* maximum bytes in one CIS */
 148 #define SBSDIO_CIS_SIZE_LIMIT           0x200
 149 /* cis offset addr is < 17 bits */
 150 #define SBSDIO_CIS_OFT_ADDR_MASK        0x1FFFF
 151
 152 /* manfid tuple length, include tuple, link bytes */
 153 #define SBSDIO_CIS_MANFID_TUPLE_LEN     6
 154
 155 /* intstatus */
 156 #define I_SMB_SW0       (1 << 0)        /* To SB Mail S/W interrupt 0 */
 157 #define I_SMB_SW1       (1 << 1)        /* To SB Mail S/W interrupt 1 */
 158 #define I_SMB_SW2       (1 << 2)        /* To SB Mail S/W interrupt 2 */
 159 #define I_SMB_SW3       (1 << 3)        /* To SB Mail S/W interrupt 3 */
 160 #define I_SMB_SW_MASK   0x0000000f      /* To SB Mail S/W interrupts mask */
 161 #define I_SMB_SW_SHIFT  0       /* To SB Mail S/W interrupts shift */
 162 #define I_HMB_SW0       (1 << 4)        /* To Host Mail S/W interrupt 0 */
 163 #define I_HMB_SW1       (1 << 5)        /* To Host Mail S/W interrupt 1 */
 164 #define I_HMB_SW2       (1 << 6)        /* To Host Mail S/W interrupt 2 */
 165 #define I_HMB_SW3       (1 << 7)        /* To Host Mail S/W interrupt 3 */
 166 #define I_HMB_SW_MASK   0x000000f0      /* To Host Mail S/W interrupts mask */
 167 #define I_HMB_SW_SHIFT  4       /* To Host Mail S/W interrupts shift */
 168 #define I_WR_OOSYNC     (1 << 8)        /* Write Frame Out Of Sync */
 169 #define I_RD_OOSYNC     (1 << 9)        /* Read Frame Out Of Sync */
 170 #define I_PC            (1 << 10)       /* descriptor error */
 171 #define I_PD            (1 << 11)       /* data error */
 172 #define I_DE            (1 << 12)       /* Descriptor protocol Error */
 173 #define I_RU            (1 << 13)       /* Receive descriptor Underflow */
 174 #define I_RO            (1 << 14)       /* Receive fifo Overflow */
 175 #define I_XU            (1 << 15)       /* Transmit fifo Underflow */
 176 #define I_RI            (1 << 16)       /* Receive Interrupt */
 177 #define I_BUSPWR        (1 << 17)       /* SDIO Bus Power Change (rev 9) */
 178 #define I_XMTDATA_AVAIL (1 << 23)       /* bits in fifo */
 179 #define I_XI            (1 << 24)       /* Transmit Interrupt */
 180 #define I_RF_TERM       (1 << 25)       /* Read Frame Terminate */
 181 #define I_WF_TERM       (1 << 26)       /* Write Frame Terminate */
 182 #define I_PCMCIA_XU     (1 << 27)       /* PCMCIA Transmit FIFO Underflow */
 183 #define I_SBINT         (1 << 28)       /* sbintstatus Interrupt */
 184 #define I_CHIPACTIVE    (1 << 29)       /* chip from doze to active state */
 185 #define I_SRESET        (1 << 30)       /* CCCR RES interrupt */
 186 #define I_IOE2          (1U << 31)      /* CCCR IOE2 Bit Changed */
 187 #define I_ERRORS        (I_PC | I_PD | I_DE | I_RU | I_RO | I_XU)
 188 #define I_DMA           (I_RI | I_XI | I_ERRORS)
 189
 190 /* corecontrol */
 191 #define CC_CISRDY               (1 << 0)        /* CIS Ready */
 192 #define CC_BPRESEN              (1 << 1)        /* CCCR RES signal */
 193 #define CC_F2RDY                (1 << 2)        /* set CCCR IOR2 bit */
 194 #define CC_CLRPADSISO           (1 << 3)        /* clear SDIO pads isolation */
 195 #define CC_XMTDATAAVAIL_MODE    (1 << 4)
 196 #define CC_XMTDATAAVAIL_CTRL    (1 << 5)
 197
 198 /* SDA_FRAMECTRL */
 199 #define SFC_RF_TERM     (1 << 0)        /* Read Frame Terminate */
 200 #define SFC_WF_TERM     (1 << 1)        /* Write Frame Terminate */
 201 #define SFC_CRC4WOOS    (1 << 2)        /* CRC error for write out of sync */
 202 #define SFC_ABORTALL    (1 << 3)        /* Abort all in-progress frames */
 203
 204 /* HW frame tag */
 205 #define SDPCM_FRAMETAG_LEN      4       /* 2 bytes len, 2 bytes check val */
 206
 207 /* Total length of frame header for dongle protocol */
 208 #define SDPCM_HDRLEN    (SDPCM_FRAMETAG_LEN + SDPCM_SWHEADER_LEN)
 209 #define SDPCM_RESERVE   (SDPCM_HDRLEN + BRCMF_SDALIGN)
 210
 211 /*
 212  * Software allocation of To SB Mailbox resources
 213  */
 214
 215 /* tosbmailbox bits corresponding to intstatus bits */
 216 #define SMB_NAK         (1 << 0)        /* Frame NAK */
 217 #define SMB_INT_ACK     (1 << 1)        /* Host Interrupt ACK */
 218 #define SMB_USE_OOB     (1 << 2)        /* Use OOB Wakeup */
 219 #define SMB_DEV_INT     (1 << 3)        /* Miscellaneous Interrupt */
 220
 221 /* tosbmailboxdata */
 222 #define SMB_DATA_VERSION_SHIFT  16      /* host protocol version */
 223
 224 /*
 225  * Software allocation of To Host Mailbox resources
 226  */
 227
 228 /* intstatus bits */
 229 #define I_HMB_FC_STATE  I_HMB_SW0       /* Flow Control State */
 230 #define I_HMB_FC_CHANGE I_HMB_SW1       /* Flow Control State Changed */
 231 #define I_HMB_FRAME_IND I_HMB_SW2       /* Frame Indication */
 232 #define I_HMB_HOST_INT  I_HMB_SW3       /* Miscellaneous Interrupt */
 233
 234 /* tohostmailboxdata */
 235 #define HMB_DATA_NAKHANDLED     1       /* retransmit NAK'd frame */
 236 #define HMB_DATA_DEVREADY       2       /* talk to host after enable */
 237 #define HMB_DATA_FC             4       /* per prio flowcontrol update flag */
 238 #define HMB_DATA_FWREADY        8       /* fw ready for protocol activity */
 239
 240 #define HMB_DATA_FCDATA_MASK    0xff000000
 241 #define HMB_DATA_FCDATA_SHIFT   24
 242
 243 #define HMB_DATA_VERSION_MASK   0x00ff0000
 244 #define HMB_DATA_VERSION_SHIFT  16
 245
 246 /*
 247  * Software-defined protocol header
 248  */
 249
 250 /* Current protocol version */
 251 #define SDPCM_PROT_VERSION      4
 252
 253 /* SW frame header */
 254 #define SDPCM_PACKET_SEQUENCE(p)        (((u8 *)p)[0] & 0xff)
 255
 256 #define SDPCM_CHANNEL_MASK              0x00000f00
 257 #define SDPCM_CHANNEL_SHIFT             8
 258 #define SDPCM_PACKET_CHANNEL(p)         (((u8 *)p)[1] & 0x0f)
 259
 260 #define SDPCM_NEXTLEN_OFFSET            2
 261
 262 /* Data Offset from SOF (HW Tag, SW Tag, Pad) */
 263 #define SDPCM_DOFFSET_OFFSET            3       /* Data Offset */
 264 #define SDPCM_DOFFSET_VALUE(p)          (((u8 *)p)[SDPCM_DOFFSET_OFFSET] & 0xff)
 265 #define SDPCM_DOFFSET_MASK              0xff000000
 266 #define SDPCM_DOFFSET_SHIFT             24
 267 #define SDPCM_FCMASK_OFFSET             4       /* Flow control */
 268 #define SDPCM_FCMASK_VALUE(p)           (((u8 *)p)[SDPCM_FCMASK_OFFSET] & 0xff)
 269 #define SDPCM_WINDOW_OFFSET             5       /* Credit based fc */
 270 #define SDPCM_WINDOW_VALUE(p)           (((u8 *)p)[SDPCM_WINDOW_OFFSET] & 0xff)
 271
 272 #define SDPCM_SWHEADER_LEN      8       /* SW header is 64 bits */
 273
 274 /* logical channel numbers */
 275 #define SDPCM_CONTROL_CHANNEL   0       /* Control channel Id */
 276 #define SDPCM_EVENT_CHANNEL     1       /* Asyc Event Indication Channel Id */
 277 #define SDPCM_DATA_CHANNEL      2       /* Data Xmit/Recv Channel Id */
 278 #define SDPCM_GLOM_CHANNEL      3       /* For coalesced packets */
 279 #define SDPCM_TEST_CHANNEL      15      /* Reserved for test/debug packets */
 280
 281 #define SDPCM_SEQUENCE_WRAP     256     /* wrap-around val for 8bit frame seq */
 282
 283 #define SDPCM_GLOMDESC(p)       (((u8 *)p)[1] & 0x80)
 284
 285 /*
 286  * Shared structure between dongle and the host.
 287  * The structure contains pointers to trap or assert information.
 288  */
 289 #define SDPCM_SHARED_VERSION       0x0003
 290 #define SDPCM_SHARED_VERSION_MASK  0x00FF
 291 #define SDPCM_SHARED_ASSERT_BUILT  0x0100
 292 #define SDPCM_SHARED_ASSERT        0x0200
 293 #define SDPCM_SHARED_TRAP          0x0400
 294
 295 /* Space for header read, limit for data packets */
 296 #define MAX_HDR_READ    (1 << 6)
 297 #define MAX_RX_DATASZ   2048
 298
 299 /* Maximum milliseconds to wait for F2 to come up */
 300 #define BRCMF_WAIT_F2RDY        3000
 301
 302 /* Bump up limit on waiting for HT to account for first startup;
 303  * if the image is doing a CRC calculation before programming the PMU
 304  * for HT availability, it could take a couple hundred ms more, so
 305  * max out at a 1 second (1000000us).
 306  */
 307 #undef PMU_MAX_TRANSITION_DLY
 308 #define PMU_MAX_TRANSITION_DLY 1000000
 309
 310 /* Value for ChipClockCSR during initial setup */
 311 #define BRCMF_INIT_CLKCTL1      (SBSDIO_FORCE_HW_CLKREQ_OFF |   \
 312                                         SBSDIO_ALP_AVAIL_REQ)
 313
 314 /* Flags for SDH calls */
 315 #define F2SYNC  (SDIO_REQ_4BYTE | SDIO_REQ_FIXED)
 316
 317 #define BRCMF_SDIO_FW_NAME      "brcm/brcmfmac-sdio.bin"
 318 #define BRCMF_SDIO_NV_NAME      "brcm/brcmfmac-sdio.txt"
 319 MODULE_FIRMWARE(BRCMF_SDIO_FW_NAME);
 320 MODULE_FIRMWARE(BRCMF_SDIO_NV_NAME);
 321
 322 #define BRCMF_IDLE_IMMEDIATE    (-1)    /* Enter idle immediately */
 323 #define BRCMF_IDLE_ACTIVE       0       /* Do not request any SD clock change
 324                                          * when idle
 325                                          */
 326 #define BRCMF_IDLE_INTERVAL     1
 327
 328 /*
 329  * Conversion of 802.1D priority to precedence level
 330  */
 331 static uint prio2prec(u32 prio)
 332 {
 333         return (prio == PRIO_8021D_NONE || prio == PRIO_8021D_BE) ?
 334                (prio^2) : prio;
 335 }
 336
 337 /* core registers */
 338 struct sdpcmd_regs {
 339         u32 corecontrol;                /* 0x00, rev8 */
 340         u32 corestatus;                 /* rev8 */
 341         u32 PAD[1];
 342         u32 biststatus;                 /* rev8 */
 343
 344         /* PCMCIA access */
 345         u16 pcmciamesportaladdr;        /* 0x010, rev8 */
 346         u16 PAD[1];
 347         u16 pcmciamesportalmask;        /* rev8 */
 348         u16 PAD[1];
 349         u16 pcmciawrframebc;            /* rev8 */
 350         u16 PAD[1];
 351         u16 pcmciaunderflowtimer;       /* rev8 */
 352         u16 PAD[1];
 353
 354         /* interrupt */
 355         u32 intstatus;                  /* 0x020, rev8 */
 356         u32 hostintmask;                /* rev8 */
 357         u32 intmask;                    /* rev8 */
 358         u32 sbintstatus;                /* rev8 */
 359         u32 sbintmask;                  /* rev8 */
 360         u32 funcintmask;                /* rev4 */
 361         u32 PAD[2];
 362         u32 tosbmailbox;                /* 0x040, rev8 */
 363         u32 tohostmailbox;              /* rev8 */
 364         u32 tosbmailboxdata;            /* rev8 */
 365         u32 tohostmailboxdata;          /* rev8 */
 366
 367         /* synchronized access to registers in SDIO clock domain */
 368         u32 sdioaccess;                 /* 0x050, rev8 */
 369         u32 PAD[3];
 370
 371         /* PCMCIA frame control */
 372         u8 pcmciaframectrl;             /* 0x060, rev8 */
 373         u8 PAD[3];
 374         u8 pcmciawatermark;             /* rev8 */
 375         u8 PAD[155];
 376
 377         /* interrupt batching control */
 378         u32 intrcvlazy;                 /* 0x100, rev8 */
 379         u32 PAD[3];
 380
 381         /* counters */
 382         u32 cmd52rd;                    /* 0x110, rev8 */
 383         u32 cmd52wr;                    /* rev8 */
 384         u32 cmd53rd;                    /* rev8 */
 385         u32 cmd53wr;                    /* rev8 */
 386         u32 abort;                      /* rev8 */
 387         u32 datacrcerror;               /* rev8 */
 388         u32 rdoutofsync;                /* rev8 */
 389         u32 wroutofsync;                /* rev8 */
 390         u32 writebusy;                  /* rev8 */
 391         u32 readwait;                   /* rev8 */
 392         u32 readterm;                   /* rev8 */
 393         u32 writeterm;                  /* rev8 */
 394         u32 PAD[40];
 395         u32 clockctlstatus;             /* rev8 */
 396         u32 PAD[7];
 397
 398         u32 PAD[128];                   /* DMA engines */
 399
 400         /* SDIO/PCMCIA CIS region */
 401         char cis[512];                  /* 0x400-0x5ff, rev6 */
 402
 403         /* PCMCIA function control registers */
 404         char pcmciafcr[256];            /* 0x600-6ff, rev6 */
 405         u16 PAD[55];
 406
 407         /* PCMCIA backplane access */
 408         u16 backplanecsr;               /* 0x76E, rev6 */
 409         u16 backplaneaddr0;             /* rev6 */
 410         u16 backplaneaddr1;             /* rev6 */
 411         u16 backplaneaddr2;             /* rev6 */
 412         u16 backplaneaddr3;             /* rev6 */
 413         u16 backplanedata0;             /* rev6 */
 414         u16 backplanedata1;             /* rev6 */
 415         u16 backplanedata2;             /* rev6 */
 416         u16 backplanedata3;             /* rev6 */
 417         u16 PAD[31];
 418
 419         /* sprom "size" & "blank" info */
 420         u16 spromstatus;                /* 0x7BE, rev2 */
 421         u32 PAD[464];
 422
 423         u16 PAD[0x80];
 424 };
 425
 426 #ifdef DEBUG
 427 /* Device console log buffer state */
 428 struct brcmf_console {
 429         uint count;             /* Poll interval msec counter */
 430         uint log_addr;          /* Log struct address (fixed) */
 431         struct rte_log_le log_le;       /* Log struct (host copy) */
 432         uint bufsize;           /* Size of log buffer */
 433         u8 *buf;                /* Log buffer (host copy) */
 434         uint last;              /* Last buffer read index */
 435 };
 436
 437 struct brcmf_trap_info {
 438         __le32          type;
 439         __le32          epc;
 440         __le32          cpsr;
 441         __le32          spsr;
 442         __le32          r0;     /* a1 */
 443         __le32          r1;     /* a2 */
 444         __le32          r2;     /* a3 */
 445         __le32          r3;     /* a4 */
 446         __le32          r4;     /* v1 */
 447         __le32          r5;     /* v2 */
 448         __le32          r6;     /* v3 */
 449         __le32          r7;     /* v4 */
 450         __le32          r8;     /* v5 */
 451         __le32          r9;     /* sb/v6 */
 452         __le32          r10;    /* sl/v7 */
 453         __le32          r11;    /* fp/v8 */
 454         __le32          r12;    /* ip */
 455         __le32          r13;    /* sp */
 456         __le32          r14;    /* lr */
 457         __le32          pc;     /* r15 */
 458 };
 459 #endif                          /* DEBUG */
 460
 461 struct sdpcm_shared {
 462         u32 flags;
 463         u32 trap_addr;
 464         u32 assert_exp_addr;
 465         u32 assert_file_addr;
 466         u32 assert_line;
 467         u32 console_addr;       /* Address of struct rte_console */
 468         u32 msgtrace_addr;
 469         u8 tag[32];
 470         u32 brpt_addr;
 471 };
 472
 473 struct sdpcm_shared_le {
 474         __le32 flags;
 475         __le32 trap_addr;
 476         __le32 assert_exp_addr;
 477         __le32 assert_file_addr;
 478         __le32 assert_line;
 479         __le32 console_addr;    /* Address of struct rte_console */
 480         __le32 msgtrace_addr;
 481         u8 tag[32];
 482         __le32 brpt_addr;
 483 };
 484
 485 /* SDIO read frame info */
 486 struct brcmf_sdio_read {
 487         u8 seq_num;
 488         u8 channel;
 489         u16 len;
 490         u16 len_left;
 491         u16 len_nxtfrm;
 492         u8 dat_offset;
 493 };
 494
 495 /* misc chip info needed by some of the routines */
 496 /* Private data for SDIO bus interaction */
 497 struct brcmf_sdio {
 498         struct brcmf_sdio_dev *sdiodev; /* sdio device handler */
 499         struct chip_info *ci;   /* Chip info struct */
 500         char *vars;             /* Variables (from CIS and/or other) */
 501         uint varsz;             /* Size of variables buffer */
 502
 503         u32 ramsize;            /* Size of RAM in SOCRAM (bytes) */
 504
 505         u32 hostintmask;        /* Copy of Host Interrupt Mask */
 506         atomic_t intstatus;     /* Intstatus bits (events) pending */
 507         atomic_t fcstate;       /* State of dongle flow-control */
 508
 509         uint blocksize;         /* Block size of SDIO transfers */
 510         uint roundup;           /* Max roundup limit */
 511
 512         struct pktq txq;        /* Queue length used for flow-control */
 513         u8 flowcontrol; /* per prio flow control bitmask */
 514         u8 tx_seq;              /* Transmit sequence number (next) */
 515         u8 tx_max;              /* Maximum transmit sequence allowed */
 516
 517         u8 hdrbuf[MAX_HDR_READ + BRCMF_SDALIGN];
 518         u8 *rxhdr;              /* Header of current rx frame (in hdrbuf) */
 519         u8 rx_seq;              /* Receive sequence number (expected) */
 520         struct brcmf_sdio_read cur_read;
 521                                 /* info of current read frame */
 522         bool rxskip;            /* Skip receive (awaiting NAK ACK) */
 523         bool rxpending;         /* Data frame pending in dongle */
 524
 525         uint rxbound;           /* Rx frames to read before resched */
 526         uint txbound;           /* Tx frames to send before resched */
 527         uint txminmax;
 528
 529         struct sk_buff *glomd;  /* Packet containing glomming descriptor */
 530         struct sk_buff_head glom; /* Packet list for glommed superframe */
 531         uint glomerr;           /* Glom packet read errors */
 532
 533         u8 *rxbuf;              /* Buffer for receiving control packets */
 534         uint rxblen;            /* Allocated length of rxbuf */
 535         u8 *rxctl;              /* Aligned pointer into rxbuf */
 536         u8 *rxctl_orig;         /* pointer for freeing rxctl */
 537         u8 *databuf;            /* Buffer for receiving big glom packet */
 538         u8 *dataptr;            /* Aligned pointer into databuf */
 539         uint rxlen;             /* Length of valid data in buffer */
 540         spinlock_t rxctl_lock;  /* protection lock for ctrl frame resources */
 541
 542         u8 sdpcm_ver;   /* Bus protocol reported by dongle */
 543
 544         bool intr;              /* Use interrupts */
 545         bool poll;              /* Use polling */
 546         atomic_t ipend;         /* Device interrupt is pending */
 547         uint spurious;          /* Count of spurious interrupts */
 548         uint pollrate;          /* Ticks between device polls */
 549         uint polltick;          /* Tick counter */
 550
 551 #ifdef DEBUG
 552         uint console_interval;
 553         struct brcmf_console console;   /* Console output polling support */
 554         uint console_addr;      /* Console address from shared struct */
 555 #endif                          /* DEBUG */
 556
 557         uint clkstate;          /* State of sd and backplane clock(s) */
 558         bool activity;          /* Activity flag for clock down */
 559         s32 idletime;           /* Control for activity timeout */
 560         s32 idlecount;  /* Activity timeout counter */
 561         s32 idleclock;  /* How to set bus driver when idle */
 562         s32 sd_rxchain;
 563         bool use_rxchain;       /* If brcmf should use PKT chains */
 564         bool rxflow_mode;       /* Rx flow control mode */
 565         bool rxflow;            /* Is rx flow control on */
 566         bool alp_only;          /* Don't use HT clock (ALP only) */
 567
 568         u8 *ctrl_frame_buf;
 569         u32 ctrl_frame_len;
 570         bool ctrl_frame_stat;
 571
 572         spinlock_t txqlock;
 573         wait_queue_head_t ctrl_wait;
 574         wait_queue_head_t dcmd_resp_wait;
 575
 576         struct timer_list timer;
 577         struct completion watchdog_wait;
 578         struct task_struct *watchdog_tsk;
 579         bool wd_timer_valid;
 580         uint save_ms;
 581
 582         struct workqueue_struct *brcmf_wq;
 583         struct work_struct datawork;
 584         struct list_head dpc_tsklst;
 585         spinlock_t dpc_tl_lock;
 586
 587         const struct firmware *firmware;
 588         u32 fw_ptr;
 589
 590         bool txoff;             /* Transmit flow-controlled */
 591         struct brcmf_sdio_count sdcnt;
 592 };
 593
 594 /* clkstate */
 595 #define CLK_NONE        0
 596 #define CLK_SDONLY      1
 597 #define CLK_PENDING     2       /* Not used yet */
 598 #define CLK_AVAIL       3
 599
 600 #ifdef DEBUG
 601 static int qcount[NUMPRIO];
 602 static int tx_packets[NUMPRIO];
 603 #endif                          /* DEBUG */
 604
 605 #define SDIO_DRIVE_STRENGTH     6       /* in milliamps */
 606
 607 #define RETRYCHAN(chan) ((chan) == SDPCM_EVENT_CHANNEL)
 608
 609 /* Retry count for register access failures */
 610 static const uint retry_limit = 2;
 611
 612 /* Limit on rounding up frames */
 613 static const uint max_roundup = 512;
 614
 615 #define ALIGNMENT  4
 616
 617 enum brcmf_sdio_frmtype {
 618         BRCMF_SDIO_FT_NORMAL,
 619         BRCMF_SDIO_FT_SUPER,
 620         BRCMF_SDIO_FT_SUB,
 621 };
 622
 623 static void pkt_align(struct sk_buff *p, int len, int align)
 624 {
 625         uint datalign;
 626         datalign = (unsigned long)(p->data);
 627         datalign = roundup(datalign, (align)) - datalign;
 628         if (datalign)
 629                 skb_pull(p, datalign);
 630         __skb_trim(p, len);
 631 }
 632
 633 /* To check if there's window offered */
 634 static bool data_ok(struct brcmf_sdio *bus)
 635 {
 636         return (u8)(bus->tx_max - bus->tx_seq) != 0 &&
 637                ((u8)(bus->tx_max - bus->tx_seq) & 0x80) == 0;
 638 }
 639
 640 /*
 641  * Reads a register in the SDIO hardware block. This block occupies a series of
 642  * adresses on the 32 bit backplane bus.
 643  */
 644 static int
 645 r_sdreg32(struct brcmf_sdio *bus, u32 *regvar, u32 offset)
 646 {
 647         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 648         int ret;
 649
 650         *regvar = brcmf_sdio_regrl(bus->sdiodev,
 651                                    bus->ci->c_inf[idx].base + offset, &ret);
 652
 653         return ret;
 654 }
 655
 656 static int
 657 w_sdreg32(struct brcmf_sdio *bus, u32 regval, u32 reg_offset)
 658 {
 659         u8 idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
 660         int ret;
 661
 662         brcmf_sdio_regwl(bus->sdiodev,
 663                          bus->ci->c_inf[idx].base + reg_offset,
 664                          regval, &ret);
 665
 666         return ret;
 667 }
 668
 669 #define PKT_AVAILABLE()         (intstatus & I_HMB_FRAME_IND)
 670
 671 #define HOSTINTMASK             (I_HMB_SW_MASK | I_CHIPACTIVE)
 672
 673 /* Turn backplane clock on or off */
 674 static int brcmf_sdbrcm_htclk(struct brcmf_sdio *bus, bool on, bool pendok)
 675 {
 676         int err;
 677         u8 clkctl, clkreq, devctl;
 678         unsigned long timeout;
 679
 680         brcmf_dbg(TRACE, "Enter\n");
 681
 682         clkctl = 0;
 683
 684         if (on) {
 685                 /* Request HT Avail */
 686                 clkreq =
 687                     bus->alp_only ? SBSDIO_ALP_AVAIL_REQ : SBSDIO_HT_AVAIL_REQ;
 688
 689                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
 690                                  clkreq, &err);
 691                 if (err) {
 692                         brcmf_err("HT Avail request error: %d\n", err);
 693                         return -EBADE;
 694                 }
 695
 696                 /* Check current status */
 697                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
 698                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
 699                 if (err) {
 700                         brcmf_err("HT Avail read error: %d\n", err);
 701                         return -EBADE;
 702                 }
 703
 704                 /* Go to pending and await interrupt if appropriate */
 705                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only) && pendok) {
 706                         /* Allow only clock-available interrupt */
 707                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 708                                                   SBSDIO_DEVICE_CTL, &err);
 709                         if (err) {
 710                                 brcmf_err("Devctl error setting CA: %d\n",
 711                                           err);
 712                                 return -EBADE;
 713                         }
 714
 715                         devctl |= SBSDIO_DEVCTL_CA_INT_ONLY;
 716                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 717                                          devctl, &err);
 718                         brcmf_dbg(INFO, "CLKCTL: set PENDING\n");
 719                         bus->clkstate = CLK_PENDING;
 720
 721                         return 0;
 722                 } else if (bus->clkstate == CLK_PENDING) {
 723                         /* Cancel CA-only interrupt filter */
 724                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 725                                                   SBSDIO_DEVICE_CTL, &err);
 726                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 727                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 728                                          devctl, &err);
 729                 }
 730
 731                 /* Otherwise, wait here (polling) for HT Avail */
 732                 timeout = jiffies +
 733                           msecs_to_jiffies(PMU_MAX_TRANSITION_DLY/1000);
 734                 while (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 735                         clkctl = brcmf_sdio_regrb(bus->sdiodev,
 736                                                   SBSDIO_FUNC1_CHIPCLKCSR,
 737                                                   &err);
 738                         if (time_after(jiffies, timeout))
 739                                 break;
 740                         else
 741                                 usleep_range(5000, 10000);
 742                 }
 743                 if (err) {
 744                         brcmf_err("HT Avail request error: %d\n", err);
 745                         return -EBADE;
 746                 }
 747                 if (!SBSDIO_CLKAV(clkctl, bus->alp_only)) {
 748                         brcmf_err("HT Avail timeout (%d): clkctl 0x%02x\n",
 749                                   PMU_MAX_TRANSITION_DLY, clkctl);
 750                         return -EBADE;
 751                 }
 752
 753                 /* Mark clock available */
 754                 bus->clkstate = CLK_AVAIL;
 755                 brcmf_dbg(INFO, "CLKCTL: turned ON\n");
 756
 757 #if defined(DEBUG)
 758                 if (!bus->alp_only) {
 759                         if (SBSDIO_ALPONLY(clkctl))
 760                                 brcmf_err("HT Clock should be on\n");
 761                 }
 762 #endif                          /* defined (DEBUG) */
 763
 764                 bus->activity = true;
 765         } else {
 766                 clkreq = 0;
 767
 768                 if (bus->clkstate == CLK_PENDING) {
 769                         /* Cancel CA-only interrupt filter */
 770                         devctl = brcmf_sdio_regrb(bus->sdiodev,
 771                                                   SBSDIO_DEVICE_CTL, &err);
 772                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
 773                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
 774                                          devctl, &err);
 775                 }
 776
 777                 bus->clkstate = CLK_SDONLY;
 778                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
 779                                  clkreq, &err);
 780                 brcmf_dbg(INFO, "CLKCTL: turned OFF\n");
 781                 if (err) {
 782                         brcmf_err("Failed access turning clock off: %d\n",
 783                                   err);
 784                         return -EBADE;
 785                 }
 786         }
 787         return 0;
 788 }
 789
 790 /* Change idle/active SD state */
 791 static int brcmf_sdbrcm_sdclk(struct brcmf_sdio *bus, bool on)
 792 {
 793         brcmf_dbg(TRACE, "Enter\n");
 794
 795         if (on)
 796                 bus->clkstate = CLK_SDONLY;
 797         else
 798                 bus->clkstate = CLK_NONE;
 799
 800         return 0;
 801 }
 802
 803 /* Transition SD and backplane clock readiness */
 804 static int brcmf_sdbrcm_clkctl(struct brcmf_sdio *bus, uint target, bool pendok)
 805 {
 806 #ifdef DEBUG
 807         uint oldstate = bus->clkstate;
 808 #endif                          /* DEBUG */
 809
 810         brcmf_dbg(TRACE, "Enter\n");
 811
 812         /* Early exit if we're already there */
 813         if (bus->clkstate == target) {
 814                 if (target == CLK_AVAIL) {
 815                         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 816                         bus->activity = true;
 817                 }
 818                 return 0;
 819         }
 820
 821         switch (target) {
 822         case CLK_AVAIL:
 823                 /* Make sure SD clock is available */
 824                 if (bus->clkstate == CLK_NONE)
 825                         brcmf_sdbrcm_sdclk(bus, true);
 826                 /* Now request HT Avail on the backplane */
 827                 brcmf_sdbrcm_htclk(bus, true, pendok);
 828                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 829                 bus->activity = true;
 830                 break;
 831
 832         case CLK_SDONLY:
 833                 /* Remove HT request, or bring up SD clock */
 834                 if (bus->clkstate == CLK_NONE)
 835                         brcmf_sdbrcm_sdclk(bus, true);
 836                 else if (bus->clkstate == CLK_AVAIL)
 837                         brcmf_sdbrcm_htclk(bus, false, false);
 838                 else
 839                         brcmf_err("request for %d -> %d\n",
 840                                   bus->clkstate, target);
 841                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
 842                 break;
 843
 844         case CLK_NONE:
 845                 /* Make sure to remove HT request */
 846                 if (bus->clkstate == CLK_AVAIL)
 847                         brcmf_sdbrcm_htclk(bus, false, false);
 848                 /* Now remove the SD clock */
 849                 brcmf_sdbrcm_sdclk(bus, false);
 850                 brcmf_sdbrcm_wd_timer(bus, 0);
 851                 break;
 852         }
 853 #ifdef DEBUG
 854         brcmf_dbg(INFO, "%d -> %d\n", oldstate, bus->clkstate);
 855 #endif                          /* DEBUG */
 856
 857         return 0;
 858 }
 859
 860 static u32 brcmf_sdbrcm_hostmail(struct brcmf_sdio *bus)
 861 {
 862         u32 intstatus = 0;
 863         u32 hmb_data;
 864         u8 fcbits;
 865         int ret;
 866
 867         brcmf_dbg(TRACE, "Enter\n");
 868
 869         /* Read mailbox data and ack that we did so */
 870         ret = r_sdreg32(bus, &hmb_data,
 871                         offsetof(struct sdpcmd_regs, tohostmailboxdata));
 872
 873         if (ret == 0)
 874                 w_sdreg32(bus, SMB_INT_ACK,
 875                           offsetof(struct sdpcmd_regs, tosbmailbox));
 876         bus->sdcnt.f1regdata += 2;
 877
 878         /* Dongle recomposed rx frames, accept them again */
 879         if (hmb_data & HMB_DATA_NAKHANDLED) {
 880                 brcmf_dbg(INFO, "Dongle reports NAK handled, expect rtx of %d\n",
 881                           bus->rx_seq);
 882                 if (!bus->rxskip)
 883                         brcmf_err("unexpected NAKHANDLED!\n");
 884
 885                 bus->rxskip = false;
 886                 intstatus |= I_HMB_FRAME_IND;
 887         }
 888
 889         /*
 890          * DEVREADY does not occur with gSPI.
 891          */
 892         if (hmb_data & (HMB_DATA_DEVREADY | HMB_DATA_FWREADY)) {
 893                 bus->sdpcm_ver =
 894                     (hmb_data & HMB_DATA_VERSION_MASK) >>
 895                     HMB_DATA_VERSION_SHIFT;
 896                 if (bus->sdpcm_ver != SDPCM_PROT_VERSION)
 897                         brcmf_err("Version mismatch, dongle reports %d, "
 898                                   "expecting %d\n",
 899                                   bus->sdpcm_ver, SDPCM_PROT_VERSION);
 900                 else
 901                         brcmf_dbg(INFO, "Dongle ready, protocol version %d\n",
 902                                   bus->sdpcm_ver);
 903         }
 904
 905         /*
 906          * Flow Control has been moved into the RX headers and this out of band
 907          * method isn't used any more.
 908          * remaining backward compatible with older dongles.
 909          */
 910         if (hmb_data & HMB_DATA_FC) {
 911                 fcbits = (hmb_data & HMB_DATA_FCDATA_MASK) >>
 912                                                         HMB_DATA_FCDATA_SHIFT;
 913
 914                 if (fcbits & ~bus->flowcontrol)
 915                         bus->sdcnt.fc_xoff++;
 916
 917                 if (bus->flowcontrol & ~fcbits)
 918                         bus->sdcnt.fc_xon++;
 919
 920                 bus->sdcnt.fc_rcvd++;
 921                 bus->flowcontrol = fcbits;
 922         }
 923
 924         /* Shouldn't be any others */
 925         if (hmb_data & ~(HMB_DATA_DEVREADY |
 926                          HMB_DATA_NAKHANDLED |
 927                          HMB_DATA_FC |
 928                          HMB_DATA_FWREADY |
 929                          HMB_DATA_FCDATA_MASK | HMB_DATA_VERSION_MASK))
 930                 brcmf_err("Unknown mailbox data content: 0x%02x\n",
 931                           hmb_data);
 932
 933         return intstatus;
 934 }
 935
 936 static void brcmf_sdbrcm_rxfail(struct brcmf_sdio *bus, bool abort, bool rtx)
 937 {
 938         uint retries = 0;
 939         u16 lastrbc;
 940         u8 hi, lo;
 941         int err;
 942
 943         brcmf_err("%sterminate frame%s\n",
 944                   abort ? "abort command, " : "",
 945                   rtx ? ", send NAK" : "");
 946
 947         if (abort)
 948                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
 949
 950         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
 951                          SFC_RF_TERM, &err);
 952         bus->sdcnt.f1regdata++;
 953
 954         /* Wait until the packet has been flushed (device/FIFO stable) */
 955         for (lastrbc = retries = 0xffff; retries > 0; retries--) {
 956                 hi = brcmf_sdio_regrb(bus->sdiodev,
 957                                       SBSDIO_FUNC1_RFRAMEBCHI, &err);
 958                 lo = brcmf_sdio_regrb(bus->sdiodev,
 959                                       SBSDIO_FUNC1_RFRAMEBCLO, &err);
 960                 bus->sdcnt.f1regdata += 2;
 961
 962                 if ((hi == 0) && (lo == 0))
 963                         break;
 964
 965                 if ((hi > (lastrbc >> 8)) && (lo > (lastrbc & 0x00ff))) {
 966                         brcmf_err("count growing: last 0x%04x now 0x%04x\n",
 967                                   lastrbc, (hi << 8) + lo);
 968                 }
 969                 lastrbc = (hi << 8) + lo;
 970         }
 971
 972         if (!retries)
 973                 brcmf_err("count never zeroed: last 0x%04x\n", lastrbc);
 974         else
 975                 brcmf_dbg(INFO, "flush took %d iterations\n", 0xffff - retries);
 976
 977         if (rtx) {
 978                 bus->sdcnt.rxrtx++;
 979                 err = w_sdreg32(bus, SMB_NAK,
 980                                 offsetof(struct sdpcmd_regs, tosbmailbox));
 981
 982                 bus->sdcnt.f1regdata++;
 983                 if (err == 0)
 984                         bus->rxskip = true;
 985         }
 986
 987         /* Clear partial in any case */
 988         bus->cur_read.len = 0;
 989
 990         /* If we can't reach the device, signal failure */
 991         if (err)
 992                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
 993 }
 994
 995 /* copy a buffer into a pkt buffer chain */
 996 static uint brcmf_sdbrcm_glom_from_buf(struct brcmf_sdio *bus, uint len)
 997 {
 998         uint n, ret = 0;
 999         struct sk_buff *p;
1000         u8 *buf;
1001
1002         buf = bus->dataptr;
1003
1004         /* copy the data */
1005         skb_queue_walk(&bus->glom, p) {
1006                 n = min_t(uint, p->len, len);
1007                 memcpy(p->data, buf, n);
1008                 buf += n;
1009                 len -= n;
1010                 ret += n;
1011                 if (!len)
1012                         break;
1013         }
1014
1015         return ret;
1016 }
1017
1018 /* return total length of buffer chain */
1019 static uint brcmf_sdbrcm_glom_len(struct brcmf_sdio *bus)
1020 {
1021         struct sk_buff *p;
1022         uint total;
1023
1024         total = 0;
1025         skb_queue_walk(&bus->glom, p)
1026                 total += p->len;
1027         return total;
1028 }
1029
1030 static void brcmf_sdbrcm_free_glom(struct brcmf_sdio *bus)
1031 {
1032         struct sk_buff *cur, *next;
1033
1034         skb_queue_walk_safe(&bus->glom, cur, next) {
1035                 skb_unlink(cur, &bus->glom);
1036                 brcmu_pkt_buf_free_skb(cur);
1037         }
1038 }
1039
1040 static int brcmf_sdio_hdparser(struct brcmf_sdio *bus, u8 *header,
1041                                struct brcmf_sdio_read *rd,
1042                                enum brcmf_sdio_frmtype type)
1043 {
1044         u16 len, checksum;
1045         u8 rx_seq, fc, tx_seq_max;
1046
1047         /*
1048          * 4 bytes hardware header (frame tag)
1049          * Byte 0~1: Frame length
1050          * Byte 2~3: Checksum, bit-wise inverse of frame length
1051          */
1052         len = get_unaligned_le16(header);
1053         checksum = get_unaligned_le16(header + sizeof(u16));
1054         /* All zero means no more to read */
1055         if (!(len | checksum)) {
1056                 bus->rxpending = false;
1057                 return -ENODATA;
1058         }
1059         if ((u16)(~(len ^ checksum))) {
1060                 brcmf_err("HW header checksum error\n");
1061                 bus->sdcnt.rx_badhdr++;
1062                 brcmf_sdbrcm_rxfail(bus, false, false);
1063                 return -EIO;
1064         }
1065         if (len < SDPCM_HDRLEN) {
1066                 brcmf_err("HW header length error\n");
1067                 return -EPROTO;
1068         }
1069         if (type == BRCMF_SDIO_FT_SUPER &&
1070             (roundup(len, bus->blocksize) != rd->len)) {
1071                 brcmf_err("HW superframe header length error\n");
1072                 return -EPROTO;
1073         }
1074         if (type == BRCMF_SDIO_FT_SUB && len > rd->len) {
1075                 brcmf_err("HW subframe header length error\n");
1076                 return -EPROTO;
1077         }
1078         rd->len = len;
1079
1080         /*
1081          * 8 bytes hardware header
1082          * Byte 0: Rx sequence number
1083          * Byte 1: 4 MSB Channel number, 4 LSB arbitrary flag
1084          * Byte 2: Length of next data frame
1085          * Byte 3: Data offset
1086          * Byte 4: Flow control bits
1087          * Byte 5: Maximum Sequence number allow for Tx
1088          * Byte 6~7: Reserved
1089          */
1090         if (type == BRCMF_SDIO_FT_SUPER &&
1091             SDPCM_GLOMDESC(&header[SDPCM_FRAMETAG_LEN])) {
1092                 brcmf_err("Glom descriptor found in superframe head\n");
1093                 rd->len = 0;
1094                 return -EINVAL;
1095         }
1096         rx_seq = SDPCM_PACKET_SEQUENCE(&header[SDPCM_FRAMETAG_LEN]);
1097         rd->channel = SDPCM_PACKET_CHANNEL(&header[SDPCM_FRAMETAG_LEN]);
1098         if (len > MAX_RX_DATASZ && rd->channel != SDPCM_CONTROL_CHANNEL &&
1099             type != BRCMF_SDIO_FT_SUPER) {
1100                 brcmf_err("HW header length too long\n");
1101                 bus->sdiodev->bus_if->dstats.rx_errors++;
1102                 bus->sdcnt.rx_toolong++;
1103                 brcmf_sdbrcm_rxfail(bus, false, false);
1104                 rd->len = 0;
1105                 return -EPROTO;
1106         }
1107         if (type == BRCMF_SDIO_FT_SUPER && rd->channel != SDPCM_GLOM_CHANNEL) {
1108                 brcmf_err("Wrong channel for superframe\n");
1109                 rd->len = 0;
1110                 return -EINVAL;
1111         }
1112         if (type == BRCMF_SDIO_FT_SUB && rd->channel != SDPCM_DATA_CHANNEL &&
1113             rd->channel != SDPCM_EVENT_CHANNEL) {
1114                 brcmf_err("Wrong channel for subframe\n");
1115                 rd->len = 0;
1116                 return -EINVAL;
1117         }
1118         rd->dat_offset = SDPCM_DOFFSET_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1119         if (rd->dat_offset < SDPCM_HDRLEN || rd->dat_offset > rd->len) {
1120                 brcmf_err("seq %d: bad data offset\n", rx_seq);
1121                 bus->sdcnt.rx_badhdr++;
1122                 brcmf_sdbrcm_rxfail(bus, false, false);
1123                 rd->len = 0;
1124                 return -ENXIO;
1125         }
1126         if (rd->seq_num != rx_seq) {
1127                 brcmf_err("seq %d: sequence number error, expect %d\n",
1128                           rx_seq, rd->seq_num);
1129                 bus->sdcnt.rx_badseq++;
1130                 rd->seq_num = rx_seq;
1131         }
1132         /* no need to check the reset for subframe */
1133         if (type == BRCMF_SDIO_FT_SUB)
1134                 return 0;
1135         rd->len_nxtfrm = header[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
1136         if (rd->len_nxtfrm << 4 > MAX_RX_DATASZ) {
1137                 /* only warm for NON glom packet */
1138                 if (rd->channel != SDPCM_GLOM_CHANNEL)
1139                         brcmf_err("seq %d: next length error\n", rx_seq);
1140                 rd->len_nxtfrm = 0;
1141         }
1142         fc = SDPCM_FCMASK_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1143         if (bus->flowcontrol != fc) {
1144                 if (~bus->flowcontrol & fc)
1145                         bus->sdcnt.fc_xoff++;
1146                 if (bus->flowcontrol & ~fc)
1147                         bus->sdcnt.fc_xon++;
1148                 bus->sdcnt.fc_rcvd++;
1149                 bus->flowcontrol = fc;
1150         }
1151         tx_seq_max = SDPCM_WINDOW_VALUE(&header[SDPCM_FRAMETAG_LEN]);
1152         if ((u8)(tx_seq_max - bus->tx_seq) > 0x40) {
1153                 brcmf_err("seq %d: max tx seq number error\n", rx_seq);
1154                 tx_seq_max = bus->tx_seq + 2;
1155         }
1156         bus->tx_max = tx_seq_max;
1157
1158         return 0;
1159 }
1160
1161 static u8 brcmf_sdbrcm_rxglom(struct brcmf_sdio *bus, u8 rxseq)
1162 {
1163         u16 dlen, totlen;
1164         u8 *dptr, num = 0;
1165
1166         u16 sublen;
1167         struct sk_buff *pfirst, *pnext;
1168
1169         int errcode;
1170         u8 doff, sfdoff;
1171
1172         int ifidx = 0;
1173         bool usechain = bus->use_rxchain;
1174
1175         struct brcmf_sdio_read rd_new;
1176
1177         /* If packets, issue read(s) and send up packet chain */
1178         /* Return sequence numbers consumed? */
1179
1180         brcmf_dbg(TRACE, "start: glomd %p glom %p\n",
1181                   bus->glomd, skb_peek(&bus->glom));
1182
1183         /* If there's a descriptor, generate the packet chain */
1184         if (bus->glomd) {
1185                 pfirst = pnext = NULL;
1186                 dlen = (u16) (bus->glomd->len);
1187                 dptr = bus->glomd->data;
1188                 if (!dlen || (dlen & 1)) {
1189                         brcmf_err("bad glomd len(%d), ignore descriptor\n",
1190                                   dlen);
1191                         dlen = 0;
1192                 }
1193
1194                 for (totlen = num = 0; dlen; num++) {
1195                         /* Get (and move past) next length */
1196                         sublen = get_unaligned_le16(dptr);
1197                         dlen -= sizeof(u16);
1198                         dptr += sizeof(u16);
1199                         if ((sublen < SDPCM_HDRLEN) ||
1200                             ((num == 0) && (sublen < (2 * SDPCM_HDRLEN)))) {
1201                                 brcmf_err("descriptor len %d bad: %d\n",
1202                                           num, sublen);
1203                                 pnext = NULL;
1204                                 break;
1205                         }
1206                         if (sublen % BRCMF_SDALIGN) {
1207                                 brcmf_err("sublen %d not multiple of %d\n",
1208                                           sublen, BRCMF_SDALIGN);
1209                                 usechain = false;
1210                         }
1211                         totlen += sublen;
1212
1213                         /* For last frame, adjust read len so total
1214                                  is a block multiple */
1215                         if (!dlen) {
1216                                 sublen +=
1217                                     (roundup(totlen, bus->blocksize) - totlen);
1218                                 totlen = roundup(totlen, bus->blocksize);
1219                         }
1220
1221                         /* Allocate/chain packet for next subframe */
1222                         pnext = brcmu_pkt_buf_get_skb(sublen + BRCMF_SDALIGN);
1223                         if (pnext == NULL) {
1224                                 brcmf_err("bcm_pkt_buf_get_skb failed, num %d len %d\n",
1225                                           num, sublen);
1226                                 break;
1227                         }
1228                         skb_queue_tail(&bus->glom, pnext);
1229
1230                         /* Adhere to start alignment requirements */
1231                         pkt_align(pnext, sublen, BRCMF_SDALIGN);
1232                 }
1233
1234                 /* If all allocations succeeded, save packet chain
1235                          in bus structure */
1236                 if (pnext) {
1237                         brcmf_dbg(GLOM, "allocated %d-byte packet chain for %d subframes\n",
1238                                   totlen, num);
1239                         if (BRCMF_GLOM_ON() && bus->cur_read.len &&
1240                             totlen != bus->cur_read.len) {
1241                                 brcmf_dbg(GLOM, "glomdesc mismatch: nextlen %d glomdesc %d rxseq %d\n",
1242                                           bus->cur_read.len, totlen, rxseq);
1243                         }
1244                         pfirst = pnext = NULL;
1245                 } else {
1246                         brcmf_sdbrcm_free_glom(bus);
1247                         num = 0;
1248                 }
1249
1250                 /* Done with descriptor packet */
1251                 brcmu_pkt_buf_free_skb(bus->glomd);
1252                 bus->glomd = NULL;
1253                 bus->cur_read.len = 0;
1254         }
1255
1256         /* Ok -- either we just generated a packet chain,
1257                  or had one from before */
1258         if (!skb_queue_empty(&bus->glom)) {
1259                 if (BRCMF_GLOM_ON()) {
1260                         brcmf_dbg(GLOM, "try superframe read, packet chain:\n");
1261                         skb_queue_walk(&bus->glom, pnext) {
1262                                 brcmf_dbg(GLOM, "    %p: %p len 0x%04x (%d)\n",
1263                                           pnext, (u8 *) (pnext->data),
1264                                           pnext->len, pnext->len);
1265                         }
1266                 }
1267
1268                 pfirst = skb_peek(&bus->glom);
1269                 dlen = (u16) brcmf_sdbrcm_glom_len(bus);
1270
1271                 /* Do an SDIO read for the superframe.  Configurable iovar to
1272                  * read directly into the chained packet, or allocate a large
1273                  * packet and and copy into the chain.
1274                  */
1275                 sdio_claim_host(bus->sdiodev->func[1]);
1276                 if (usechain) {
1277                         errcode = brcmf_sdcard_recv_chain(bus->sdiodev,
1278                                         bus->sdiodev->sbwad,
1279                                         SDIO_FUNC_2, F2SYNC, &bus->glom);
1280                 } else if (bus->dataptr) {
1281                         errcode = brcmf_sdcard_recv_buf(bus->sdiodev,
1282                                         bus->sdiodev->sbwad,
1283                                         SDIO_FUNC_2, F2SYNC,
1284                                         bus->dataptr, dlen);
1285                         sublen = (u16) brcmf_sdbrcm_glom_from_buf(bus, dlen);
1286                         if (sublen != dlen) {
1287                                 brcmf_err("FAILED TO COPY, dlen %d sublen %d\n",
1288                                           dlen, sublen);
1289                                 errcode = -1;
1290                         }
1291                         pnext = NULL;
1292                 } else {
1293                         brcmf_err("COULDN'T ALLOC %d-BYTE GLOM, FORCE FAILURE\n",
1294                                   dlen);
1295                         errcode = -1;
1296                 }
1297                 sdio_release_host(bus->sdiodev->func[1]);
1298                 bus->sdcnt.f2rxdata++;
1299
1300                 /* On failure, kill the superframe, allow a couple retries */
1301                 if (errcode < 0) {
1302                         brcmf_err("glom read of %d bytes failed: %d\n",
1303                                   dlen, errcode);
1304                         bus->sdiodev->bus_if->dstats.rx_errors++;
1305
1306                         sdio_claim_host(bus->sdiodev->func[1]);
1307                         if (bus->glomerr++ < 3) {
1308                                 brcmf_sdbrcm_rxfail(bus, true, true);
1309                         } else {
1310                                 bus->glomerr = 0;
1311                                 brcmf_sdbrcm_rxfail(bus, true, false);
1312                                 bus->sdcnt.rxglomfail++;
1313                                 brcmf_sdbrcm_free_glom(bus);
1314                         }
1315                         sdio_release_host(bus->sdiodev->func[1]);
1316                         return 0;
1317                 }
1318
1319                 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1320                                    pfirst->data, min_t(int, pfirst->len, 48),
1321                                    "SUPERFRAME:\n");
1322
1323                 rd_new.seq_num = rxseq;
1324                 rd_new.len = dlen;
1325                 sdio_claim_host(bus->sdiodev->func[1]);
1326                 errcode = brcmf_sdio_hdparser(bus, pfirst->data, &rd_new,
1327                                               BRCMF_SDIO_FT_SUPER);
1328                 sdio_release_host(bus->sdiodev->func[1]);
1329                 bus->cur_read.len = rd_new.len_nxtfrm << 4;
1330
1331                 /* Remove superframe header, remember offset */
1332                 skb_pull(pfirst, rd_new.dat_offset);
1333                 sfdoff = rd_new.dat_offset;
1334                 num = 0;
1335
1336                 /* Validate all the subframe headers */
1337                 skb_queue_walk(&bus->glom, pnext) {
1338                         /* leave when invalid subframe is found */
1339                         if (errcode)
1340                                 break;
1341
1342                         rd_new.len = pnext->len;
1343                         rd_new.seq_num = rxseq++;
1344                         sdio_claim_host(bus->sdiodev->func[1]);
1345                         errcode = brcmf_sdio_hdparser(bus, pnext->data, &rd_new,
1346                                                       BRCMF_SDIO_FT_SUB);
1347                         sdio_release_host(bus->sdiodev->func[1]);
1348                         brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1349                                            pnext->data, 32, "subframe:\n");
1350
1351                         num++;
1352                 }
1353
1354                 if (errcode) {
1355                         /* Terminate frame on error, request
1356                                  a couple retries */
1357                         sdio_claim_host(bus->sdiodev->func[1]);
1358                         if (bus->glomerr++ < 3) {
1359                                 /* Restore superframe header space */
1360                                 skb_push(pfirst, sfdoff);
1361                                 brcmf_sdbrcm_rxfail(bus, true, true);
1362                         } else {
1363                                 bus->glomerr = 0;
1364                                 brcmf_sdbrcm_rxfail(bus, true, false);
1365                                 bus->sdcnt.rxglomfail++;
1366                                 brcmf_sdbrcm_free_glom(bus);
1367                         }
1368                         sdio_release_host(bus->sdiodev->func[1]);
1369                         bus->cur_read.len = 0;
1370                         return 0;
1371                 }
1372
1373                 /* Basic SD framing looks ok - process each packet (header) */
1374
1375                 skb_queue_walk_safe(&bus->glom, pfirst, pnext) {
1376                         dptr = (u8 *) (pfirst->data);
1377                         sublen = get_unaligned_le16(dptr);
1378                         doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
1379
1380                         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1381                                            dptr, pfirst->len,
1382                                            "Rx Subframe Data:\n");
1383
1384                         __skb_trim(pfirst, sublen);
1385                         skb_pull(pfirst, doff);
1386
1387                         if (pfirst->len == 0) {
1388                                 skb_unlink(pfirst, &bus->glom);
1389                                 brcmu_pkt_buf_free_skb(pfirst);
1390                                 continue;
1391                         } else if (brcmf_proto_hdrpull(bus->sdiodev->dev,
1392                                                        &ifidx, pfirst) != 0) {
1393                                 brcmf_err("rx protocol error\n");
1394                                 bus->sdiodev->bus_if->dstats.rx_errors++;
1395                                 skb_unlink(pfirst, &bus->glom);
1396                                 brcmu_pkt_buf_free_skb(pfirst);
1397                                 continue;
1398                         }
1399
1400                         brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1401                                            pfirst->data,
1402                                            min_t(int, pfirst->len, 32),
1403                                            "subframe %d to stack, %p (%p/%d) nxt/lnk %p/%p\n",
1404                                            bus->glom.qlen, pfirst, pfirst->data,
1405                                            pfirst->len, pfirst->next,
1406                                            pfirst->prev);
1407                 }
1408                 /* sent any remaining packets up */
1409                 if (bus->glom.qlen)
1410                         brcmf_rx_frame(bus->sdiodev->dev, ifidx, &bus->glom);
1411
1412                 bus->sdcnt.rxglomframes++;
1413                 bus->sdcnt.rxglompkts += bus->glom.qlen;
1414         }
1415         return num;
1416 }
1417
1418 static int brcmf_sdbrcm_dcmd_resp_wait(struct brcmf_sdio *bus, uint *condition,
1419                                         bool *pending)
1420 {
1421         DECLARE_WAITQUEUE(wait, current);
1422         int timeout = msecs_to_jiffies(DCMD_RESP_TIMEOUT);
1423
1424         /* Wait until control frame is available */
1425         add_wait_queue(&bus->dcmd_resp_wait, &wait);
1426         set_current_state(TASK_INTERRUPTIBLE);
1427
1428         while (!(*condition) && (!signal_pending(current) && timeout))
1429                 timeout = schedule_timeout(timeout);
1430
1431         if (signal_pending(current))
1432                 *pending = true;
1433
1434         set_current_state(TASK_RUNNING);
1435         remove_wait_queue(&bus->dcmd_resp_wait, &wait);
1436
1437         return timeout;
1438 }
1439
1440 static int brcmf_sdbrcm_dcmd_resp_wake(struct brcmf_sdio *bus)
1441 {
1442         if (waitqueue_active(&bus->dcmd_resp_wait))
1443                 wake_up_interruptible(&bus->dcmd_resp_wait);
1444
1445         return 0;
1446 }
1447 static void
1448 brcmf_sdbrcm_read_control(struct brcmf_sdio *bus, u8 *hdr, uint len, uint doff)
1449 {
1450         uint rdlen, pad;
1451         u8 *buf = NULL, *rbuf;
1452         int sdret;
1453
1454         brcmf_dbg(TRACE, "Enter\n");
1455
1456         if (bus->rxblen)
1457                 buf = vzalloc(bus->rxblen);
1458         if (!buf) {
1459                 brcmf_err("no memory for control frame\n");
1460                 goto done;
1461         }
1462         rbuf = bus->rxbuf;
1463         pad = ((unsigned long)rbuf % BRCMF_SDALIGN);
1464         if (pad)
1465                 rbuf += (BRCMF_SDALIGN - pad);
1466
1467         /* Copy the already-read portion over */
1468         memcpy(buf, hdr, BRCMF_FIRSTREAD);
1469         if (len <= BRCMF_FIRSTREAD)
1470                 goto gotpkt;
1471
1472         /* Raise rdlen to next SDIO block to avoid tail command */
1473         rdlen = len - BRCMF_FIRSTREAD;
1474         if (bus->roundup && bus->blocksize && (rdlen > bus->blocksize)) {
1475                 pad = bus->blocksize - (rdlen % bus->blocksize);
1476                 if ((pad <= bus->roundup) && (pad < bus->blocksize) &&
1477                     ((len + pad) < bus->sdiodev->bus_if->maxctl))
1478                         rdlen += pad;
1479         } else if (rdlen % BRCMF_SDALIGN) {
1480                 rdlen += BRCMF_SDALIGN - (rdlen % BRCMF_SDALIGN);
1481         }
1482
1483         /* Satisfy length-alignment requirements */
1484         if (rdlen & (ALIGNMENT - 1))
1485                 rdlen = roundup(rdlen, ALIGNMENT);
1486
1487         /* Drop if the read is too big or it exceeds our maximum */
1488         if ((rdlen + BRCMF_FIRSTREAD) > bus->sdiodev->bus_if->maxctl) {
1489                 brcmf_err("%d-byte control read exceeds %d-byte buffer\n",
1490                           rdlen, bus->sdiodev->bus_if->maxctl);
1491                 bus->sdiodev->bus_if->dstats.rx_errors++;
1492                 brcmf_sdbrcm_rxfail(bus, false, false);
1493                 goto done;
1494         }
1495
1496         if ((len - doff) > bus->sdiodev->bus_if->maxctl) {
1497                 brcmf_err("%d-byte ctl frame (%d-byte ctl data) exceeds %d-byte limit\n",
1498                           len, len - doff, bus->sdiodev->bus_if->maxctl);
1499                 bus->sdiodev->bus_if->dstats.rx_errors++;
1500                 bus->sdcnt.rx_toolong++;
1501                 brcmf_sdbrcm_rxfail(bus, false, false);
1502                 goto done;
1503         }
1504
1505         /* Read remain of frame body */
1506         sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1507                                 bus->sdiodev->sbwad,
1508                                 SDIO_FUNC_2,
1509                                 F2SYNC, rbuf, rdlen);
1510         bus->sdcnt.f2rxdata++;
1511
1512         /* Control frame failures need retransmission */
1513         if (sdret < 0) {
1514                 brcmf_err("read %d control bytes failed: %d\n",
1515                           rdlen, sdret);
1516                 bus->sdcnt.rxc_errors++;
1517                 brcmf_sdbrcm_rxfail(bus, true, true);
1518                 goto done;
1519         } else
1520                 memcpy(buf + BRCMF_FIRSTREAD, rbuf, rdlen);
1521
1522 gotpkt:
1523
1524         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
1525                            buf, len, "RxCtrl:\n");
1526
1527         /* Point to valid data and indicate its length */
1528         spin_lock_bh(&bus->rxctl_lock);
1529         if (bus->rxctl) {
1530                 brcmf_err("last control frame is being processed.\n");
1531                 spin_unlock_bh(&bus->rxctl_lock);
1532                 vfree(buf);
1533                 goto done;
1534         }
1535         bus->rxctl = buf + doff;
1536         bus->rxctl_orig = buf;
1537         bus->rxlen = len - doff;
1538         spin_unlock_bh(&bus->rxctl_lock);
1539
1540 done:
1541         /* Awake any waiters */
1542         brcmf_sdbrcm_dcmd_resp_wake(bus);
1543 }
1544
1545 /* Pad read to blocksize for efficiency */
1546 static void brcmf_pad(struct brcmf_sdio *bus, u16 *pad, u16 *rdlen)
1547 {
1548         if (bus->roundup && bus->blocksize && *rdlen > bus->blocksize) {
1549                 *pad = bus->blocksize - (*rdlen % bus->blocksize);
1550                 if (*pad <= bus->roundup && *pad < bus->blocksize &&
1551                     *rdlen + *pad + BRCMF_FIRSTREAD < MAX_RX_DATASZ)
1552                         *rdlen += *pad;
1553         } else if (*rdlen % BRCMF_SDALIGN) {
1554                 *rdlen += BRCMF_SDALIGN - (*rdlen % BRCMF_SDALIGN);
1555         }
1556 }
1557
1558 static uint brcmf_sdio_readframes(struct brcmf_sdio *bus, uint maxframes)
1559 {
1560         struct sk_buff *pkt;            /* Packet for event or data frames */
1561         u16 pad;                /* Number of pad bytes to read */
1562         uint rxleft = 0;        /* Remaining number of frames allowed */
1563         int sdret;              /* Return code from calls */
1564         int ifidx = 0;
1565         uint rxcount = 0;       /* Total frames read */
1566         struct brcmf_sdio_read *rd = &bus->cur_read, rd_new;
1567         u8 head_read = 0;
1568
1569         brcmf_dbg(TRACE, "Enter\n");
1570
1571         /* Not finished unless we encounter no more frames indication */
1572         bus->rxpending = true;
1573
1574         for (rd->seq_num = bus->rx_seq, rxleft = maxframes;
1575              !bus->rxskip && rxleft &&
1576              bus->sdiodev->bus_if->state != BRCMF_BUS_DOWN;
1577              rd->seq_num++, rxleft--) {
1578
1579                 /* Handle glomming separately */
1580                 if (bus->glomd || !skb_queue_empty(&bus->glom)) {
1581                         u8 cnt;
1582                         brcmf_dbg(GLOM, "calling rxglom: glomd %p, glom %p\n",
1583                                   bus->glomd, skb_peek(&bus->glom));
1584                         cnt = brcmf_sdbrcm_rxglom(bus, rd->seq_num);
1585                         brcmf_dbg(GLOM, "rxglom returned %d\n", cnt);
1586                         rd->seq_num += cnt - 1;
1587                         rxleft = (rxleft > cnt) ? (rxleft - cnt) : 1;
1588                         continue;
1589                 }
1590
1591                 rd->len_left = rd->len;
1592                 /* read header first for unknow frame length */
1593                 sdio_claim_host(bus->sdiodev->func[1]);
1594                 if (!rd->len) {
1595                         sdret = brcmf_sdcard_recv_buf(bus->sdiodev,
1596                                                       bus->sdiodev->sbwad,
1597                                                       SDIO_FUNC_2, F2SYNC,
1598                                                       bus->rxhdr,
1599                                                       BRCMF_FIRSTREAD);
1600                         bus->sdcnt.f2rxhdrs++;
1601                         if (sdret < 0) {
1602                                 brcmf_err("RXHEADER FAILED: %d\n",
1603                                           sdret);
1604                                 bus->sdcnt.rx_hdrfail++;
1605                                 brcmf_sdbrcm_rxfail(bus, true, true);
1606                                 sdio_release_host(bus->sdiodev->func[1]);
1607                                 continue;
1608                         }
1609
1610                         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() || BRCMF_HDRS_ON(),
1611                                            bus->rxhdr, SDPCM_HDRLEN,
1612                                            "RxHdr:\n");
1613
1614                         if (brcmf_sdio_hdparser(bus, bus->rxhdr, rd,
1615                                                 BRCMF_SDIO_FT_NORMAL)) {
1616                                 sdio_release_host(bus->sdiodev->func[1]);
1617                                 if (!bus->rxpending)
1618                                         break;
1619                                 else
1620                                         continue;
1621                         }
1622
1623                         if (rd->channel == SDPCM_CONTROL_CHANNEL) {
1624                                 brcmf_sdbrcm_read_control(bus, bus->rxhdr,
1625                                                           rd->len,
1626                                                           rd->dat_offset);
1627                                 /* prepare the descriptor for the next read */
1628                                 rd->len = rd->len_nxtfrm << 4;
1629                                 rd->len_nxtfrm = 0;
1630                                 /* treat all packet as event if we don't know */
1631                                 rd->channel = SDPCM_EVENT_CHANNEL;
1632                                 sdio_release_host(bus->sdiodev->func[1]);
1633                                 continue;
1634                         }
1635                         rd->len_left = rd->len > BRCMF_FIRSTREAD ?
1636                                        rd->len - BRCMF_FIRSTREAD : 0;
1637                         head_read = BRCMF_FIRSTREAD;
1638                 }
1639
1640                 brcmf_pad(bus, &pad, &rd->len_left);
1641
1642                 pkt = brcmu_pkt_buf_get_skb(rd->len_left + head_read +
1643                                             BRCMF_SDALIGN);
1644                 if (!pkt) {
1645                         /* Give up on data, request rtx of events */
1646                         brcmf_err("brcmu_pkt_buf_get_skb failed\n");
1647                         bus->sdiodev->bus_if->dstats.rx_dropped++;
1648                         brcmf_sdbrcm_rxfail(bus, false,
1649                                             RETRYCHAN(rd->channel));
1650                         sdio_release_host(bus->sdiodev->func[1]);
1651                         continue;
1652                 }
1653                 skb_pull(pkt, head_read);
1654                 pkt_align(pkt, rd->len_left, BRCMF_SDALIGN);
1655
1656                 sdret = brcmf_sdcard_recv_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1657                                               SDIO_FUNC_2, F2SYNC, pkt);
1658                 bus->sdcnt.f2rxdata++;
1659                 sdio_release_host(bus->sdiodev->func[1]);
1660
1661                 if (sdret < 0) {
1662                         brcmf_err("read %d bytes from channel %d failed: %d\n",
1663                                   rd->len, rd->channel, sdret);
1664                         brcmu_pkt_buf_free_skb(pkt);
1665                         bus->sdiodev->bus_if->dstats.rx_errors++;
1666                         sdio_claim_host(bus->sdiodev->func[1]);
1667                         brcmf_sdbrcm_rxfail(bus, true,
1668                                             RETRYCHAN(rd->channel));
1669                         sdio_release_host(bus->sdiodev->func[1]);
1670                         continue;
1671                 }
1672
1673                 if (head_read) {
1674                         skb_push(pkt, head_read);
1675                         memcpy(pkt->data, bus->rxhdr, head_read);
1676                         head_read = 0;
1677                 } else {
1678                         memcpy(bus->rxhdr, pkt->data, SDPCM_HDRLEN);
1679                         rd_new.seq_num = rd->seq_num;
1680                         sdio_claim_host(bus->sdiodev->func[1]);
1681                         if (brcmf_sdio_hdparser(bus, bus->rxhdr, &rd_new,
1682                                                 BRCMF_SDIO_FT_NORMAL)) {
1683                                 rd->len = 0;
1684                                 brcmu_pkt_buf_free_skb(pkt);
1685                         }
1686                         bus->sdcnt.rx_readahead_cnt++;
1687                         if (rd->len != roundup(rd_new.len, 16)) {
1688                                 brcmf_err("frame length mismatch:read %d, should be %d\n",
1689                                           rd->len,
1690                                           roundup(rd_new.len, 16) >> 4);
1691                                 rd->len = 0;
1692                                 brcmf_sdbrcm_rxfail(bus, true, true);
1693                                 sdio_release_host(bus->sdiodev->func[1]);
1694                                 brcmu_pkt_buf_free_skb(pkt);
1695                                 continue;
1696                         }
1697                         sdio_release_host(bus->sdiodev->func[1]);
1698                         rd->len_nxtfrm = rd_new.len_nxtfrm;
1699                         rd->channel = rd_new.channel;
1700                         rd->dat_offset = rd_new.dat_offset;
1701
1702                         brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1703                                              BRCMF_DATA_ON()) &&
1704                                            BRCMF_HDRS_ON(),
1705                                            bus->rxhdr, SDPCM_HDRLEN,
1706                                            "RxHdr:\n");
1707
1708                         if (rd_new.channel == SDPCM_CONTROL_CHANNEL) {
1709                                 brcmf_err("readahead on control packet %d?\n",
1710                                           rd_new.seq_num);
1711                                 /* Force retry w/normal header read */
1712                                 rd->len = 0;
1713                                 sdio_claim_host(bus->sdiodev->func[1]);
1714                                 brcmf_sdbrcm_rxfail(bus, false, true);
1715                                 sdio_release_host(bus->sdiodev->func[1]);
1716                                 brcmu_pkt_buf_free_skb(pkt);
1717                                 continue;
1718                         }
1719                 }
1720
1721                 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_DATA_ON(),
1722                                    pkt->data, rd->len, "Rx Data:\n");
1723
1724                 /* Save superframe descriptor and allocate packet frame */
1725                 if (rd->channel == SDPCM_GLOM_CHANNEL) {
1726                         if (SDPCM_GLOMDESC(&bus->rxhdr[SDPCM_FRAMETAG_LEN])) {
1727                                 brcmf_dbg(GLOM, "glom descriptor, %d bytes:\n",
1728                                           rd->len);
1729                                 brcmf_dbg_hex_dump(BRCMF_GLOM_ON(),
1730                                                    pkt->data, rd->len,
1731                                                    "Glom Data:\n");
1732                                 __skb_trim(pkt, rd->len);
1733                                 skb_pull(pkt, SDPCM_HDRLEN);
1734                                 bus->glomd = pkt;
1735                         } else {
1736                                 brcmf_err("%s: glom superframe w/o "
1737                                           "descriptor!\n", __func__);
1738                                 sdio_claim_host(bus->sdiodev->func[1]);
1739                                 brcmf_sdbrcm_rxfail(bus, false, false);
1740                                 sdio_release_host(bus->sdiodev->func[1]);
1741                         }
1742                         /* prepare the descriptor for the next read */
1743                         rd->len = rd->len_nxtfrm << 4;
1744                         rd->len_nxtfrm = 0;
1745                         /* treat all packet as event if we don't know */
1746                         rd->channel = SDPCM_EVENT_CHANNEL;
1747                         continue;
1748                 }
1749
1750                 /* Fill in packet len and prio, deliver upward */
1751                 __skb_trim(pkt, rd->len);
1752                 skb_pull(pkt, rd->dat_offset);
1753
1754                 /* prepare the descriptor for the next read */
1755                 rd->len = rd->len_nxtfrm << 4;
1756                 rd->len_nxtfrm = 0;
1757                 /* treat all packet as event if we don't know */
1758                 rd->channel = SDPCM_EVENT_CHANNEL;
1759
1760                 if (pkt->len == 0) {
1761                         brcmu_pkt_buf_free_skb(pkt);
1762                         continue;
1763                 } else if (brcmf_proto_hdrpull(bus->sdiodev->dev, &ifidx,
1764                            pkt) != 0) {
1765                         brcmf_err("rx protocol error\n");
1766                         brcmu_pkt_buf_free_skb(pkt);
1767                         bus->sdiodev->bus_if->dstats.rx_errors++;
1768                         continue;
1769                 }
1770
1771                 brcmf_rx_packet(bus->sdiodev->dev, ifidx, pkt);
1772         }
1773
1774         rxcount = maxframes - rxleft;
1775         /* Message if we hit the limit */
1776         if (!rxleft)
1777                 brcmf_dbg(DATA, "hit rx limit of %d frames\n", maxframes);
1778         else
1779                 brcmf_dbg(DATA, "processed %d frames\n", rxcount);
1780         /* Back off rxseq if awaiting rtx, update rx_seq */
1781         if (bus->rxskip)
1782                 rd->seq_num--;
1783         bus->rx_seq = rd->seq_num;
1784
1785         return rxcount;
1786 }
1787
1788 static void
1789 brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus)
1790 {
1791         if (waitqueue_active(&bus->ctrl_wait))
1792                 wake_up_interruptible(&bus->ctrl_wait);
1793         return;
1794 }
1795
1796 /* Writes a HW/SW header into the packet and sends it. */
1797 /* Assumes: (a) header space already there, (b) caller holds lock */
1798 static int brcmf_sdbrcm_txpkt(struct brcmf_sdio *bus, struct sk_buff *pkt,
1799                               uint chan, bool free_pkt)
1800 {
1801         int ret;
1802         u8 *frame;
1803         u16 len, pad = 0;
1804         u32 swheader;
1805         struct sk_buff *new;
1806         int i;
1807
1808         brcmf_dbg(TRACE, "Enter\n");
1809
1810         frame = (u8 *) (pkt->data);
1811
1812         /* Add alignment padding, allocate new packet if needed */
1813         pad = ((unsigned long)frame % BRCMF_SDALIGN);
1814         if (pad) {
1815                 if (skb_headroom(pkt) < pad) {
1816                         brcmf_dbg(INFO, "insufficient headroom %d for %d pad\n",
1817                                   skb_headroom(pkt), pad);
1818                         bus->sdiodev->bus_if->tx_realloc++;
1819                         new = brcmu_pkt_buf_get_skb(pkt->len + BRCMF_SDALIGN);
1820                         if (!new) {
1821                                 brcmf_err("couldn't allocate new %d-byte packet\n",
1822                                           pkt->len + BRCMF_SDALIGN);
1823                                 ret = -ENOMEM;
1824                                 goto done;
1825                         }
1826
1827                         pkt_align(new, pkt->len, BRCMF_SDALIGN);
1828                         memcpy(new->data, pkt->data, pkt->len);
1829                         if (free_pkt)
1830                                 brcmu_pkt_buf_free_skb(pkt);
1831                         /* free the pkt if canned one is not used */
1832                         free_pkt = true;
1833                         pkt = new;
1834                         frame = (u8 *) (pkt->data);
1835                         /* precondition: (frame % BRCMF_SDALIGN) == 0) */
1836                         pad = 0;
1837                 } else {
1838                         skb_push(pkt, pad);
1839                         frame = (u8 *) (pkt->data);
1840                         /* precondition: pad + SDPCM_HDRLEN <= pkt->len */
1841                         memset(frame, 0, pad + SDPCM_HDRLEN);
1842                 }
1843         }
1844         /* precondition: pad < BRCMF_SDALIGN */
1845
1846         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
1847         len = (u16) (pkt->len);
1848         *(__le16 *) frame = cpu_to_le16(len);
1849         *(((__le16 *) frame) + 1) = cpu_to_le16(~len);
1850
1851         /* Software tag: channel, sequence number, data offset */
1852         swheader =
1853             ((chan << SDPCM_CHANNEL_SHIFT) & SDPCM_CHANNEL_MASK) | bus->tx_seq |
1854             (((pad +
1855                SDPCM_HDRLEN) << SDPCM_DOFFSET_SHIFT) & SDPCM_DOFFSET_MASK);
1856
1857         put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
1858         put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
1859
1860 #ifdef DEBUG
1861         tx_packets[pkt->priority]++;
1862 #endif
1863
1864         brcmf_dbg_hex_dump(BRCMF_BYTES_ON() &&
1865                            ((BRCMF_CTL_ON() && chan == SDPCM_CONTROL_CHANNEL) ||
1866                             (BRCMF_DATA_ON() && chan != SDPCM_CONTROL_CHANNEL)),
1867                            frame, len, "Tx Frame:\n");
1868         brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() &&
1869                              ((BRCMF_CTL_ON() &&
1870                                chan == SDPCM_CONTROL_CHANNEL) ||
1871                               (BRCMF_DATA_ON() &&
1872                                chan != SDPCM_CONTROL_CHANNEL))) &&
1873                            BRCMF_HDRS_ON(),
1874                            frame, min_t(u16, len, 16), "TxHdr:\n");
1875
1876         /* Raise len to next SDIO block to eliminate tail command */
1877         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
1878                 u16 pad = bus->blocksize - (len % bus->blocksize);
1879                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
1880                                 len += pad;
1881         } else if (len % BRCMF_SDALIGN) {
1882                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
1883         }
1884
1885         /* Some controllers have trouble with odd bytes -- round to even */
1886         if (len & (ALIGNMENT - 1))
1887                         len = roundup(len, ALIGNMENT);
1888
1889         sdio_claim_host(bus->sdiodev->func[1]);
1890         ret = brcmf_sdcard_send_pkt(bus->sdiodev, bus->sdiodev->sbwad,
1891                                     SDIO_FUNC_2, F2SYNC, pkt);
1892         bus->sdcnt.f2txdata++;
1893
1894         if (ret < 0) {
1895                 /* On failure, abort the command and terminate the frame */
1896                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
1897                           ret);
1898                 bus->sdcnt.tx_sderrs++;
1899
1900                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
1901                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
1902                                  SFC_WF_TERM, NULL);
1903                 bus->sdcnt.f1regdata++;
1904
1905                 for (i = 0; i < 3; i++) {
1906                         u8 hi, lo;
1907                         hi = brcmf_sdio_regrb(bus->sdiodev,
1908                                               SBSDIO_FUNC1_WFRAMEBCHI, NULL);
1909                         lo = brcmf_sdio_regrb(bus->sdiodev,
1910                                               SBSDIO_FUNC1_WFRAMEBCLO, NULL);
1911                         bus->sdcnt.f1regdata += 2;
1912                         if ((hi == 0) && (lo == 0))
1913                                 break;
1914                 }
1915
1916         }
1917         sdio_release_host(bus->sdiodev->func[1]);
1918         if (ret == 0)
1919                 bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
1920
1921 done:
1922         /* restore pkt buffer pointer before calling tx complete routine */
1923         skb_pull(pkt, SDPCM_HDRLEN + pad);
1924         brcmf_txcomplete(bus->sdiodev->dev, pkt, ret != 0);
1925
1926         if (free_pkt)
1927                 brcmu_pkt_buf_free_skb(pkt);
1928
1929         return ret;
1930 }
1931
1932 static uint brcmf_sdbrcm_sendfromq(struct brcmf_sdio *bus, uint maxframes)
1933 {
1934         struct sk_buff *pkt;
1935         u32 intstatus = 0;
1936         int ret = 0, prec_out;
1937         uint cnt = 0;
1938         uint datalen;
1939         u8 tx_prec_map;
1940
1941         brcmf_dbg(TRACE, "Enter\n");
1942
1943         tx_prec_map = ~bus->flowcontrol;
1944
1945         /* Send frames until the limit or some other event */
1946         for (cnt = 0; (cnt < maxframes) && data_ok(bus); cnt++) {
1947                 spin_lock_bh(&bus->txqlock);
1948                 pkt = brcmu_pktq_mdeq(&bus->txq, tx_prec_map, &prec_out);
1949                 if (pkt == NULL) {
1950                         spin_unlock_bh(&bus->txqlock);
1951                         break;
1952                 }
1953                 spin_unlock_bh(&bus->txqlock);
1954                 datalen = pkt->len - SDPCM_HDRLEN;
1955
1956                 ret = brcmf_sdbrcm_txpkt(bus, pkt, SDPCM_DATA_CHANNEL, true);
1957                 if (ret)
1958                         bus->sdiodev->bus_if->dstats.tx_errors++;
1959                 else
1960                         bus->sdiodev->bus_if->dstats.tx_bytes += datalen;
1961
1962                 /* In poll mode, need to check for other events */
1963                 if (!bus->intr && cnt) {
1964                         /* Check device status, signal pending interrupt */
1965                         sdio_claim_host(bus->sdiodev->func[1]);
1966                         ret = r_sdreg32(bus, &intstatus,
1967                                         offsetof(struct sdpcmd_regs,
1968                                                  intstatus));
1969                         sdio_release_host(bus->sdiodev->func[1]);
1970                         bus->sdcnt.f2txdata++;
1971                         if (ret != 0)
1972                                 break;
1973                         if (intstatus & bus->hostintmask)
1974                                 atomic_set(&bus->ipend, 1);
1975                 }
1976         }
1977
1978         /* Deflow-control stack if needed */
1979         if (bus->sdiodev->bus_if->drvr_up &&
1980             (bus->sdiodev->bus_if->state == BRCMF_BUS_DATA) &&
1981             bus->txoff && (pktq_len(&bus->txq) < TXLOW)) {
1982                 bus->txoff = false;
1983                 brcmf_txflowblock(bus->sdiodev->dev, false);
1984         }
1985
1986         return cnt;
1987 }
1988
1989 static void brcmf_sdbrcm_bus_stop(struct device *dev)
1990 {
1991         u32 local_hostintmask;
1992         u8 saveclk;
1993         int err;
1994         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
1995         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
1996         struct brcmf_sdio *bus = sdiodev->bus;
1997
1998         brcmf_dbg(TRACE, "Enter\n");
1999
2000         if (bus->watchdog_tsk) {
2001                 send_sig(SIGTERM, bus->watchdog_tsk, 1);
2002                 kthread_stop(bus->watchdog_tsk);
2003                 bus->watchdog_tsk = NULL;
2004         }
2005
2006         sdio_claim_host(bus->sdiodev->func[1]);
2007
2008         /* Enable clock for device interrupts */
2009         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
2010
2011         /* Disable and clear interrupts at the chip level also */
2012         w_sdreg32(bus, 0, offsetof(struct sdpcmd_regs, hostintmask));
2013         local_hostintmask = bus->hostintmask;
2014         bus->hostintmask = 0;
2015
2016         /* Change our idea of bus state */
2017         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2018
2019         /* Force clocks on backplane to be sure F2 interrupt propagates */
2020         saveclk = brcmf_sdio_regrb(bus->sdiodev,
2021                                    SBSDIO_FUNC1_CHIPCLKCSR, &err);
2022         if (!err) {
2023                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
2024                                  (saveclk | SBSDIO_FORCE_HT), &err);
2025         }
2026         if (err)
2027                 brcmf_err("Failed to force clock for F2: err %d\n", err);
2028
2029         /* Turn off the bus (F2), free any pending packets */
2030         brcmf_dbg(INTR, "disable SDIO interrupts\n");
2031         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, SDIO_FUNC_ENABLE_1,
2032                          NULL);
2033
2034         /* Clear any pending interrupts now that F2 is disabled */
2035         w_sdreg32(bus, local_hostintmask,
2036                   offsetof(struct sdpcmd_regs, intstatus));
2037
2038         /* Turn off the backplane clock (only) */
2039         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
2040         sdio_release_host(bus->sdiodev->func[1]);
2041
2042         /* Clear the data packet queues */
2043         brcmu_pktq_flush(&bus->txq, true, NULL, NULL);
2044
2045         /* Clear any held glomming stuff */
2046         if (bus->glomd)
2047                 brcmu_pkt_buf_free_skb(bus->glomd);
2048         brcmf_sdbrcm_free_glom(bus);
2049
2050         /* Clear rx control and wake any waiters */
2051         spin_lock_bh(&bus->rxctl_lock);
2052         bus->rxlen = 0;
2053         spin_unlock_bh(&bus->rxctl_lock);
2054         brcmf_sdbrcm_dcmd_resp_wake(bus);
2055
2056         /* Reset some F2 state stuff */
2057         bus->rxskip = false;
2058         bus->tx_seq = bus->rx_seq = 0;
2059 }
2060
2061 #ifdef CONFIG_BRCMFMAC_SDIO_OOB
2062 static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2063 {
2064         unsigned long flags;
2065
2066         spin_lock_irqsave(&bus->sdiodev->irq_en_lock, flags);
2067         if (!bus->sdiodev->irq_en && !atomic_read(&bus->ipend)) {
2068                 enable_irq(bus->sdiodev->irq);
2069                 bus->sdiodev->irq_en = true;
2070         }
2071         spin_unlock_irqrestore(&bus->sdiodev->irq_en_lock, flags);
2072 }
2073 #else
2074 static inline void brcmf_sdbrcm_clrintr(struct brcmf_sdio *bus)
2075 {
2076 }
2077 #endif          /* CONFIG_BRCMFMAC_SDIO_OOB */
2078
2079 static inline void brcmf_sdbrcm_adddpctsk(struct brcmf_sdio *bus)
2080 {
2081         struct list_head *new_hd;
2082         unsigned long flags;
2083
2084         if (in_interrupt())
2085                 new_hd = kzalloc(sizeof(struct list_head), GFP_ATOMIC);
2086         else
2087                 new_hd = kzalloc(sizeof(struct list_head), GFP_KERNEL);
2088         if (new_hd == NULL)
2089                 return;
2090
2091         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2092         list_add_tail(new_hd, &bus->dpc_tsklst);
2093         spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2094 }
2095
2096 static int brcmf_sdio_intr_rstatus(struct brcmf_sdio *bus)
2097 {
2098         u8 idx;
2099         u32 addr;
2100         unsigned long val;
2101         int n, ret;
2102
2103         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
2104         addr = bus->ci->c_inf[idx].base +
2105                offsetof(struct sdpcmd_regs, intstatus);
2106
2107         ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, false);
2108         bus->sdcnt.f1regdata++;
2109         if (ret != 0)
2110                 val = 0;
2111
2112         val &= bus->hostintmask;
2113         atomic_set(&bus->fcstate, !!(val & I_HMB_FC_STATE));
2114
2115         /* Clear interrupts */
2116         if (val) {
2117                 ret = brcmf_sdio_regrw_helper(bus->sdiodev, addr, &val, true);
2118                 bus->sdcnt.f1regdata++;
2119         }
2120
2121         if (ret) {
2122                 atomic_set(&bus->intstatus, 0);
2123         } else if (val) {
2124                 for_each_set_bit(n, &val, 32)
2125                         set_bit(n, (unsigned long *)&bus->intstatus.counter);
2126         }
2127
2128         return ret;
2129 }
2130
2131 static void brcmf_sdbrcm_dpc(struct brcmf_sdio *bus)
2132 {
2133         u32 newstatus = 0;
2134         unsigned long intstatus;
2135         uint rxlimit = bus->rxbound;    /* Rx frames to read before resched */
2136         uint txlimit = bus->txbound;    /* Tx frames to send before resched */
2137         uint framecnt = 0;      /* Temporary counter of tx/rx frames */
2138         int err = 0, n;
2139
2140         brcmf_dbg(TRACE, "Enter\n");
2141
2142         sdio_claim_host(bus->sdiodev->func[1]);
2143
2144         /* If waiting for HTAVAIL, check status */
2145         if (bus->clkstate == CLK_PENDING) {
2146                 u8 clkctl, devctl = 0;
2147
2148 #ifdef DEBUG
2149                 /* Check for inconsistent device control */
2150                 devctl = brcmf_sdio_regrb(bus->sdiodev,
2151                                           SBSDIO_DEVICE_CTL, &err);
2152                 if (err) {
2153                         brcmf_err("error reading DEVCTL: %d\n", err);
2154                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2155                 }
2156 #endif                          /* DEBUG */
2157
2158                 /* Read CSR, if clock on switch to AVAIL, else ignore */
2159                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
2160                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
2161                 if (err) {
2162                         brcmf_err("error reading CSR: %d\n",
2163                                   err);
2164                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2165                 }
2166
2167                 brcmf_dbg(INFO, "DPC: PENDING, devctl 0x%02x clkctl 0x%02x\n",
2168                           devctl, clkctl);
2169
2170                 if (SBSDIO_HTAV(clkctl)) {
2171                         devctl = brcmf_sdio_regrb(bus->sdiodev,
2172                                                   SBSDIO_DEVICE_CTL, &err);
2173                         if (err) {
2174                                 brcmf_err("error reading DEVCTL: %d\n",
2175                                           err);
2176                                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2177                         }
2178                         devctl &= ~SBSDIO_DEVCTL_CA_INT_ONLY;
2179                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_DEVICE_CTL,
2180                                          devctl, &err);
2181                         if (err) {
2182                                 brcmf_err("error writing DEVCTL: %d\n",
2183                                           err);
2184                                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2185                         }
2186                         bus->clkstate = CLK_AVAIL;
2187                 }
2188         }
2189
2190         /* Make sure backplane clock is on */
2191         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, true);
2192
2193         /* Pending interrupt indicates new device status */
2194         if (atomic_read(&bus->ipend) > 0) {
2195                 atomic_set(&bus->ipend, 0);
2196                 err = brcmf_sdio_intr_rstatus(bus);
2197         }
2198
2199         /* Start with leftover status bits */
2200         intstatus = atomic_xchg(&bus->intstatus, 0);
2201
2202         /* Handle flow-control change: read new state in case our ack
2203          * crossed another change interrupt.  If change still set, assume
2204          * FC ON for safety, let next loop through do the debounce.
2205          */
2206         if (intstatus & I_HMB_FC_CHANGE) {
2207                 intstatus &= ~I_HMB_FC_CHANGE;
2208                 err = w_sdreg32(bus, I_HMB_FC_CHANGE,
2209                                 offsetof(struct sdpcmd_regs, intstatus));
2210
2211                 err = r_sdreg32(bus, &newstatus,
2212                                 offsetof(struct sdpcmd_regs, intstatus));
2213                 bus->sdcnt.f1regdata += 2;
2214                 atomic_set(&bus->fcstate,
2215                            !!(newstatus & (I_HMB_FC_STATE | I_HMB_FC_CHANGE)));
2216                 intstatus |= (newstatus & bus->hostintmask);
2217         }
2218
2219         /* Handle host mailbox indication */
2220         if (intstatus & I_HMB_HOST_INT) {
2221                 intstatus &= ~I_HMB_HOST_INT;
2222                 intstatus |= brcmf_sdbrcm_hostmail(bus);
2223         }
2224
2225         sdio_release_host(bus->sdiodev->func[1]);
2226
2227         /* Generally don't ask for these, can get CRC errors... */
2228         if (intstatus & I_WR_OOSYNC) {
2229                 brcmf_err("Dongle reports WR_OOSYNC\n");
2230                 intstatus &= ~I_WR_OOSYNC;
2231         }
2232
2233         if (intstatus & I_RD_OOSYNC) {
2234                 brcmf_err("Dongle reports RD_OOSYNC\n");
2235                 intstatus &= ~I_RD_OOSYNC;
2236         }
2237
2238         if (intstatus & I_SBINT) {
2239                 brcmf_err("Dongle reports SBINT\n");
2240                 intstatus &= ~I_SBINT;
2241         }
2242
2243         /* Would be active due to wake-wlan in gSPI */
2244         if (intstatus & I_CHIPACTIVE) {
2245                 brcmf_dbg(INFO, "Dongle reports CHIPACTIVE\n");
2246                 intstatus &= ~I_CHIPACTIVE;
2247         }
2248
2249         /* Ignore frame indications if rxskip is set */
2250         if (bus->rxskip)
2251                 intstatus &= ~I_HMB_FRAME_IND;
2252
2253         /* On frame indication, read available frames */
2254         if (PKT_AVAILABLE() && bus->clkstate == CLK_AVAIL) {
2255                 framecnt = brcmf_sdio_readframes(bus, rxlimit);
2256                 if (!bus->rxpending)
2257                         intstatus &= ~I_HMB_FRAME_IND;
2258                 rxlimit -= min(framecnt, rxlimit);
2259         }
2260
2261         /* Keep still-pending events for next scheduling */
2262         if (intstatus) {
2263                 for_each_set_bit(n, &intstatus, 32)
2264                         set_bit(n, (unsigned long *)&bus->intstatus.counter);
2265         }
2266
2267         brcmf_sdbrcm_clrintr(bus);
2268
2269         if (data_ok(bus) && bus->ctrl_frame_stat &&
2270                 (bus->clkstate == CLK_AVAIL)) {
2271                 int i;
2272
2273                 sdio_claim_host(bus->sdiodev->func[1]);
2274                 err = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2275                         SDIO_FUNC_2, F2SYNC, bus->ctrl_frame_buf,
2276                         (u32) bus->ctrl_frame_len);
2277
2278                 if (err < 0) {
2279                         /* On failure, abort the command and
2280                                 terminate the frame */
2281                         brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2282                                   err);
2283                         bus->sdcnt.tx_sderrs++;
2284
2285                         brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2286
2287                         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2288                                          SFC_WF_TERM, &err);
2289                         bus->sdcnt.f1regdata++;
2290
2291                         for (i = 0; i < 3; i++) {
2292                                 u8 hi, lo;
2293                                 hi = brcmf_sdio_regrb(bus->sdiodev,
2294                                                       SBSDIO_FUNC1_WFRAMEBCHI,
2295                                                       &err);
2296                                 lo = brcmf_sdio_regrb(bus->sdiodev,
2297                                                       SBSDIO_FUNC1_WFRAMEBCLO,
2298                                                       &err);
2299                                 bus->sdcnt.f1regdata += 2;
2300                                 if ((hi == 0) && (lo == 0))
2301                                         break;
2302                         }
2303
2304                 } else {
2305                         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2306                 }
2307                 sdio_release_host(bus->sdiodev->func[1]);
2308                 bus->ctrl_frame_stat = false;
2309                 brcmf_sdbrcm_wait_event_wakeup(bus);
2310         }
2311         /* Send queued frames (limit 1 if rx may still be pending) */
2312         else if ((bus->clkstate == CLK_AVAIL) && !atomic_read(&bus->fcstate) &&
2313                  brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) && txlimit
2314                  && data_ok(bus)) {
2315                 framecnt = bus->rxpending ? min(txlimit, bus->txminmax) :
2316                                             txlimit;
2317                 framecnt = brcmf_sdbrcm_sendfromq(bus, framecnt);
2318                 txlimit -= framecnt;
2319         }
2320
2321         if ((bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) || (err != 0)) {
2322                 brcmf_err("failed backplane access over SDIO, halting operation\n");
2323                 bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
2324                 atomic_set(&bus->intstatus, 0);
2325         } else if (atomic_read(&bus->intstatus) ||
2326                    atomic_read(&bus->ipend) > 0 ||
2327                    (!atomic_read(&bus->fcstate) &&
2328                     brcmu_pktq_mlen(&bus->txq, ~bus->flowcontrol) &&
2329                     data_ok(bus)) || PKT_AVAILABLE()) {
2330                 brcmf_sdbrcm_adddpctsk(bus);
2331         }
2332
2333         /* If we're done for now, turn off clock request. */
2334         if ((bus->clkstate != CLK_PENDING)
2335             && bus->idletime == BRCMF_IDLE_IMMEDIATE) {
2336                 bus->activity = false;
2337                 sdio_claim_host(bus->sdiodev->func[1]);
2338                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
2339                 sdio_release_host(bus->sdiodev->func[1]);
2340         }
2341 }
2342
2343 static int brcmf_sdbrcm_bus_txdata(struct device *dev, struct sk_buff *pkt)
2344 {
2345         int ret = -EBADE;
2346         uint datalen, prec;
2347         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2348         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2349         struct brcmf_sdio *bus = sdiodev->bus;
2350         unsigned long flags;
2351
2352         brcmf_dbg(TRACE, "Enter\n");
2353
2354         datalen = pkt->len;
2355
2356         /* Add space for the header */
2357         skb_push(pkt, SDPCM_HDRLEN);
2358         /* precondition: IS_ALIGNED((unsigned long)(pkt->data), 2) */
2359
2360         prec = prio2prec((pkt->priority & PRIOMASK));
2361
2362         /* Check for existing queue, current flow-control,
2363                          pending event, or pending clock */
2364         brcmf_dbg(TRACE, "deferring pktq len %d\n", pktq_len(&bus->txq));
2365         bus->sdcnt.fcqueued++;
2366
2367         /* Priority based enq */
2368         spin_lock_bh(&bus->txqlock);
2369         if (!brcmf_c_prec_enq(bus->sdiodev->dev, &bus->txq, pkt, prec)) {
2370                 skb_pull(pkt, SDPCM_HDRLEN);
2371                 brcmf_txcomplete(bus->sdiodev->dev, pkt, false);
2372                 brcmu_pkt_buf_free_skb(pkt);
2373                 brcmf_err("out of bus->txq !!!\n");
2374                 ret = -ENOSR;
2375         } else {
2376                 ret = 0;
2377         }
2378         spin_unlock_bh(&bus->txqlock);
2379
2380         if (pktq_len(&bus->txq) >= TXHI) {
2381                 bus->txoff = true;
2382                 brcmf_txflowblock(bus->sdiodev->dev, true);
2383         }
2384
2385 #ifdef DEBUG
2386         if (pktq_plen(&bus->txq, prec) > qcount[prec])
2387                 qcount[prec] = pktq_plen(&bus->txq, prec);
2388 #endif
2389
2390         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2391         if (list_empty(&bus->dpc_tsklst)) {
2392                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2393
2394                 brcmf_sdbrcm_adddpctsk(bus);
2395                 queue_work(bus->brcmf_wq, &bus->datawork);
2396         } else {
2397                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2398         }
2399
2400         return ret;
2401 }
2402
2403 static int
2404 brcmf_sdbrcm_membytes(struct brcmf_sdio *bus, bool write, u32 address, u8 *data,
2405                  uint size)
2406 {
2407         int bcmerror = 0;
2408         u32 sdaddr;
2409         uint dsize;
2410
2411         /* Determine initial transfer parameters */
2412         sdaddr = address & SBSDIO_SB_OFT_ADDR_MASK;
2413         if ((sdaddr + size) & SBSDIO_SBWINDOW_MASK)
2414                 dsize = (SBSDIO_SB_OFT_ADDR_LIMIT - sdaddr);
2415         else
2416                 dsize = size;
2417
2418         sdio_claim_host(bus->sdiodev->func[1]);
2419
2420         /* Set the backplane window to include the start address */
2421         bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev, address);
2422         if (bcmerror) {
2423                 brcmf_err("window change failed\n");
2424                 goto xfer_done;
2425         }
2426
2427         /* Do the transfer(s) */
2428         while (size) {
2429                 brcmf_dbg(INFO, "%s %d bytes at offset 0x%08x in window 0x%08x\n",
2430                           write ? "write" : "read", dsize,
2431                           sdaddr, address & SBSDIO_SBWINDOW_MASK);
2432                 bcmerror = brcmf_sdcard_rwdata(bus->sdiodev, write,
2433                                                sdaddr, data, dsize);
2434                 if (bcmerror) {
2435                         brcmf_err("membytes transfer failed\n");
2436                         break;
2437                 }
2438
2439                 /* Adjust for next transfer (if any) */
2440                 size -= dsize;
2441                 if (size) {
2442                         data += dsize;
2443                         address += dsize;
2444                         bcmerror = brcmf_sdcard_set_sbaddr_window(bus->sdiodev,
2445                                                                   address);
2446                         if (bcmerror) {
2447                                 brcmf_err("window change failed\n");
2448                                 break;
2449                         }
2450                         sdaddr = 0;
2451                         dsize = min_t(uint, SBSDIO_SB_OFT_ADDR_LIMIT, size);
2452                 }
2453         }
2454
2455 xfer_done:
2456         /* Return the window to backplane enumeration space for core access */
2457         if (brcmf_sdcard_set_sbaddr_window(bus->sdiodev, bus->sdiodev->sbwad))
2458                 brcmf_err("FAILED to set window back to 0x%x\n",
2459                           bus->sdiodev->sbwad);
2460
2461         sdio_release_host(bus->sdiodev->func[1]);
2462
2463         return bcmerror;
2464 }
2465
2466 #ifdef DEBUG
2467 #define CONSOLE_LINE_MAX        192
2468
2469 static int brcmf_sdbrcm_readconsole(struct brcmf_sdio *bus)
2470 {
2471         struct brcmf_console *c = &bus->console;
2472         u8 line[CONSOLE_LINE_MAX], ch;
2473         u32 n, idx, addr;
2474         int rv;
2475
2476         /* Don't do anything until FWREADY updates console address */
2477         if (bus->console_addr == 0)
2478                 return 0;
2479
2480         /* Read console log struct */
2481         addr = bus->console_addr + offsetof(struct rte_console, log_le);
2482         rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&c->log_le,
2483                                    sizeof(c->log_le));
2484         if (rv < 0)
2485                 return rv;
2486
2487         /* Allocate console buffer (one time only) */
2488         if (c->buf == NULL) {
2489                 c->bufsize = le32_to_cpu(c->log_le.buf_size);
2490                 c->buf = kmalloc(c->bufsize, GFP_ATOMIC);
2491                 if (c->buf == NULL)
2492                         return -ENOMEM;
2493         }
2494
2495         idx = le32_to_cpu(c->log_le.idx);
2496
2497         /* Protect against corrupt value */
2498         if (idx > c->bufsize)
2499                 return -EBADE;
2500
2501         /* Skip reading the console buffer if the index pointer
2502          has not moved */
2503         if (idx == c->last)
2504                 return 0;
2505
2506         /* Read the console buffer */
2507         addr = le32_to_cpu(c->log_le.buf);
2508         rv = brcmf_sdbrcm_membytes(bus, false, addr, c->buf, c->bufsize);
2509         if (rv < 0)
2510                 return rv;
2511
2512         while (c->last != idx) {
2513                 for (n = 0; n < CONSOLE_LINE_MAX - 2; n++) {
2514                         if (c->last == idx) {
2515                                 /* This would output a partial line.
2516                                  * Instead, back up
2517                                  * the buffer pointer and output this
2518                                  * line next time around.
2519                                  */
2520                                 if (c->last >= n)
2521                                         c->last -= n;
2522                                 else
2523                                         c->last = c->bufsize - n;
2524                                 goto break2;
2525                         }
2526                         ch = c->buf[c->last];
2527                         c->last = (c->last + 1) % c->bufsize;
2528                         if (ch == '\n')
2529                                 break;
2530                         line[n] = ch;
2531                 }
2532
2533                 if (n > 0) {
2534                         if (line[n - 1] == '\r')
2535                                 n--;
2536                         line[n] = 0;
2537                         pr_debug("CONSOLE: %s\n", line);
2538                 }
2539         }
2540 break2:
2541
2542         return 0;
2543 }
2544 #endif                          /* DEBUG */
2545
2546 static int brcmf_tx_frame(struct brcmf_sdio *bus, u8 *frame, u16 len)
2547 {
2548         int i;
2549         int ret;
2550
2551         bus->ctrl_frame_stat = false;
2552         ret = brcmf_sdcard_send_buf(bus->sdiodev, bus->sdiodev->sbwad,
2553                                     SDIO_FUNC_2, F2SYNC, frame, len);
2554
2555         if (ret < 0) {
2556                 /* On failure, abort the command and terminate the frame */
2557                 brcmf_dbg(INFO, "sdio error %d, abort command and terminate frame\n",
2558                           ret);
2559                 bus->sdcnt.tx_sderrs++;
2560
2561                 brcmf_sdcard_abort(bus->sdiodev, SDIO_FUNC_2);
2562
2563                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_FRAMECTRL,
2564                                  SFC_WF_TERM, NULL);
2565                 bus->sdcnt.f1regdata++;
2566
2567                 for (i = 0; i < 3; i++) {
2568                         u8 hi, lo;
2569                         hi = brcmf_sdio_regrb(bus->sdiodev,
2570                                               SBSDIO_FUNC1_WFRAMEBCHI, NULL);
2571                         lo = brcmf_sdio_regrb(bus->sdiodev,
2572                                               SBSDIO_FUNC1_WFRAMEBCLO, NULL);
2573                         bus->sdcnt.f1regdata += 2;
2574                         if (hi == 0 && lo == 0)
2575                                 break;
2576                 }
2577                 return ret;
2578         }
2579
2580         bus->tx_seq = (bus->tx_seq + 1) % SDPCM_SEQUENCE_WRAP;
2581
2582         return ret;
2583 }
2584
2585 static int
2586 brcmf_sdbrcm_bus_txctl(struct device *dev, unsigned char *msg, uint msglen)
2587 {
2588         u8 *frame;
2589         u16 len;
2590         u32 swheader;
2591         uint retries = 0;
2592         u8 doff = 0;
2593         int ret = -1;
2594         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
2595         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
2596         struct brcmf_sdio *bus = sdiodev->bus;
2597         unsigned long flags;
2598
2599         brcmf_dbg(TRACE, "Enter\n");
2600
2601         /* Back the pointer to make a room for bus header */
2602         frame = msg - SDPCM_HDRLEN;
2603         len = (msglen += SDPCM_HDRLEN);
2604
2605         /* Add alignment padding (optional for ctl frames) */
2606         doff = ((unsigned long)frame % BRCMF_SDALIGN);
2607         if (doff) {
2608                 frame -= doff;
2609                 len += doff;
2610                 msglen += doff;
2611                 memset(frame, 0, doff + SDPCM_HDRLEN);
2612         }
2613         /* precondition: doff < BRCMF_SDALIGN */
2614         doff += SDPCM_HDRLEN;
2615
2616         /* Round send length to next SDIO block */
2617         if (bus->roundup && bus->blocksize && (len > bus->blocksize)) {
2618                 u16 pad = bus->blocksize - (len % bus->blocksize);
2619                 if ((pad <= bus->roundup) && (pad < bus->blocksize))
2620                         len += pad;
2621         } else if (len % BRCMF_SDALIGN) {
2622                 len += BRCMF_SDALIGN - (len % BRCMF_SDALIGN);
2623         }
2624
2625         /* Satisfy length-alignment requirements */
2626         if (len & (ALIGNMENT - 1))
2627                 len = roundup(len, ALIGNMENT);
2628
2629         /* precondition: IS_ALIGNED((unsigned long)frame, 2) */
2630
2631         /* Make sure backplane clock is on */
2632         sdio_claim_host(bus->sdiodev->func[1]);
2633         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
2634         sdio_release_host(bus->sdiodev->func[1]);
2635
2636         /* Hardware tag: 2 byte len followed by 2 byte ~len check (all LE) */
2637         *(__le16 *) frame = cpu_to_le16((u16) msglen);
2638         *(((__le16 *) frame) + 1) = cpu_to_le16(~msglen);
2639
2640         /* Software tag: channel, sequence number, data offset */
2641         swheader =
2642             ((SDPCM_CONTROL_CHANNEL << SDPCM_CHANNEL_SHIFT) &
2643              SDPCM_CHANNEL_MASK)
2644             | bus->tx_seq | ((doff << SDPCM_DOFFSET_SHIFT) &
2645                              SDPCM_DOFFSET_MASK);
2646         put_unaligned_le32(swheader, frame + SDPCM_FRAMETAG_LEN);
2647         put_unaligned_le32(0, frame + SDPCM_FRAMETAG_LEN + sizeof(swheader));
2648
2649         if (!data_ok(bus)) {
2650                 brcmf_dbg(INFO, "No bus credit bus->tx_max %d, bus->tx_seq %d\n",
2651                           bus->tx_max, bus->tx_seq);
2652                 bus->ctrl_frame_stat = true;
2653                 /* Send from dpc */
2654                 bus->ctrl_frame_buf = frame;
2655                 bus->ctrl_frame_len = len;
2656
2657                 wait_event_interruptible_timeout(bus->ctrl_wait,
2658                                                  !bus->ctrl_frame_stat,
2659                                                  msecs_to_jiffies(2000));
2660
2661                 if (!bus->ctrl_frame_stat) {
2662                         brcmf_dbg(INFO, "ctrl_frame_stat == false\n");
2663                         ret = 0;
2664                 } else {
2665                         brcmf_dbg(INFO, "ctrl_frame_stat == true\n");
2666                         ret = -1;
2667                 }
2668         }
2669
2670         if (ret == -1) {
2671                 brcmf_dbg_hex_dump(BRCMF_BYTES_ON() && BRCMF_CTL_ON(),
2672                                    frame, len, "Tx Frame:\n");
2673                 brcmf_dbg_hex_dump(!(BRCMF_BYTES_ON() && BRCMF_CTL_ON()) &&
2674                                    BRCMF_HDRS_ON(),
2675                                    frame, min_t(u16, len, 16), "TxHdr:\n");
2676
2677                 do {
2678                         sdio_claim_host(bus->sdiodev->func[1]);
2679                         ret = brcmf_tx_frame(bus, frame, len);
2680                         sdio_release_host(bus->sdiodev->func[1]);
2681                 } while (ret < 0 && retries++ < TXRETRIES);
2682         }
2683
2684         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
2685         if ((bus->idletime == BRCMF_IDLE_IMMEDIATE) &&
2686             list_empty(&bus->dpc_tsklst)) {
2687                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2688
2689                 bus->activity = false;
2690                 sdio_claim_host(bus->sdiodev->func[1]);
2691                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, true);
2692                 sdio_release_host(bus->sdiodev->func[1]);
2693         } else {
2694                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
2695         }
2696
2697         if (ret)
2698                 bus->sdcnt.tx_ctlerrs++;
2699         else
2700                 bus->sdcnt.tx_ctlpkts++;
2701
2702         return ret ? -EIO : 0;
2703 }
2704
2705 #ifdef DEBUG
2706 static inline bool brcmf_sdio_valid_shared_address(u32 addr)
2707 {
2708         return !(addr == 0 || ((~addr >> 16) & 0xffff) == (addr & 0xffff));
2709 }
2710
2711 static int brcmf_sdio_readshared(struct brcmf_sdio *bus,
2712                                  struct sdpcm_shared *sh)
2713 {
2714         u32 addr;
2715         int rv;
2716         u32 shaddr = 0;
2717         struct sdpcm_shared_le sh_le;
2718         __le32 addr_le;
2719
2720         shaddr = bus->ramsize - 4;
2721
2722         /*
2723          * Read last word in socram to determine
2724          * address of sdpcm_shared structure
2725          */
2726         sdio_claim_host(bus->sdiodev->func[1]);
2727         rv = brcmf_sdbrcm_membytes(bus, false, shaddr,
2728                                    (u8 *)&addr_le, 4);
2729         sdio_claim_host(bus->sdiodev->func[1]);
2730         if (rv < 0)
2731                 return rv;
2732
2733         addr = le32_to_cpu(addr_le);
2734
2735         brcmf_dbg(INFO, "sdpcm_shared address 0x%08X\n", addr);
2736
2737         /*
2738          * Check if addr is valid.
2739          * NVRAM length at the end of memory should have been overwritten.
2740          */
2741         if (!brcmf_sdio_valid_shared_address(addr)) {
2742                         brcmf_err("invalid sdpcm_shared address 0x%08X\n",
2743                                   addr);
2744                         return -EINVAL;
2745         }
2746
2747         /* Read hndrte_shared structure */
2748         sdio_claim_host(bus->sdiodev->func[1]);
2749         rv = brcmf_sdbrcm_membytes(bus, false, addr, (u8 *)&sh_le,
2750                                    sizeof(struct sdpcm_shared_le));
2751         sdio_release_host(bus->sdiodev->func[1]);
2752         if (rv < 0)
2753                 return rv;
2754
2755         /* Endianness */
2756         sh->flags = le32_to_cpu(sh_le.flags);
2757         sh->trap_addr = le32_to_cpu(sh_le.trap_addr);
2758         sh->assert_exp_addr = le32_to_cpu(sh_le.assert_exp_addr);
2759         sh->assert_file_addr = le32_to_cpu(sh_le.assert_file_addr);
2760         sh->assert_line = le32_to_cpu(sh_le.assert_line);
2761         sh->console_addr = le32_to_cpu(sh_le.console_addr);
2762         sh->msgtrace_addr = le32_to_cpu(sh_le.msgtrace_addr);
2763
2764         if ((sh->flags & SDPCM_SHARED_VERSION_MASK) != SDPCM_SHARED_VERSION) {
2765                 brcmf_err("sdpcm_shared version mismatch: dhd %d dongle %d\n",
2766                           SDPCM_SHARED_VERSION,
2767                           sh->flags & SDPCM_SHARED_VERSION_MASK);
2768                 return -EPROTO;
2769         }
2770
2771         return 0;
2772 }
2773
2774 static int brcmf_sdio_dump_console(struct brcmf_sdio *bus,
2775                                    struct sdpcm_shared *sh, char __user *data,
2776                                    size_t count)
2777 {
2778         u32 addr, console_ptr, console_size, console_index;
2779         char *conbuf = NULL;
2780         __le32 sh_val;
2781         int rv;
2782         loff_t pos = 0;
2783         int nbytes = 0;
2784
2785         /* obtain console information from device memory */
2786         addr = sh->console_addr + offsetof(struct rte_console, log_le);
2787         rv = brcmf_sdbrcm_membytes(bus, false, addr,
2788                         (u8 *)&sh_val, sizeof(u32));
2789         if (rv < 0)
2790                 return rv;
2791         console_ptr = le32_to_cpu(sh_val);
2792
2793         addr = sh->console_addr + offsetof(struct rte_console, log_le.buf_size);
2794         rv = brcmf_sdbrcm_membytes(bus, false, addr,
2795                         (u8 *)&sh_val, sizeof(u32));
2796         if (rv < 0)
2797                 return rv;
2798         console_size = le32_to_cpu(sh_val);
2799
2800         addr = sh->console_addr + offsetof(struct rte_console, log_le.idx);
2801         rv = brcmf_sdbrcm_membytes(bus, false, addr,
2802                         (u8 *)&sh_val, sizeof(u32));
2803         if (rv < 0)
2804                 return rv;
2805         console_index = le32_to_cpu(sh_val);
2806
2807         /* allocate buffer for console data */
2808         if (console_size <= CONSOLE_BUFFER_MAX)
2809                 conbuf = vzalloc(console_size+1);
2810
2811         if (!conbuf)
2812                 return -ENOMEM;
2813
2814         /* obtain the console data from device */
2815         conbuf[console_size] = '\0';
2816         rv = brcmf_sdbrcm_membytes(bus, false, console_ptr, (u8 *)conbuf,
2817                                    console_size);
2818         if (rv < 0)
2819                 goto done;
2820
2821         rv = simple_read_from_buffer(data, count, &pos,
2822                                      conbuf + console_index,
2823                                      console_size - console_index);
2824         if (rv < 0)
2825                 goto done;
2826
2827         nbytes = rv;
2828         if (console_index > 0) {
2829                 pos = 0;
2830                 rv = simple_read_from_buffer(data+nbytes, count, &pos,
2831                                              conbuf, console_index - 1);
2832                 if (rv < 0)
2833                         goto done;
2834                 rv += nbytes;
2835         }
2836 done:
2837         vfree(conbuf);
2838         return rv;
2839 }
2840
2841 static int brcmf_sdio_trap_info(struct brcmf_sdio *bus, struct sdpcm_shared *sh,
2842                                 char __user *data, size_t count)
2843 {
2844         int error, res;
2845         char buf[350];
2846         struct brcmf_trap_info tr;
2847         int nbytes;
2848         loff_t pos = 0;
2849
2850         if ((sh->flags & SDPCM_SHARED_TRAP) == 0)
2851                 return 0;
2852
2853         sdio_claim_host(bus->sdiodev->func[1]);
2854         error = brcmf_sdbrcm_membytes(bus, false, sh->trap_addr, (u8 *)&tr,
2855                                       sizeof(struct brcmf_trap_info));
2856         if (error < 0)
2857                 return error;
2858
2859         nbytes = brcmf_sdio_dump_console(bus, sh, data, count);
2860         sdio_release_host(bus->sdiodev->func[1]);
2861         if (nbytes < 0)
2862                 return nbytes;
2863
2864         res = scnprintf(buf, sizeof(buf),
2865                         "dongle trap info: type 0x%x @ epc 0x%08x\n"
2866                         "  cpsr 0x%08x spsr 0x%08x sp 0x%08x\n"
2867                         "  lr   0x%08x pc   0x%08x offset 0x%x\n"
2868                         "  r0   0x%08x r1   0x%08x r2 0x%08x r3 0x%08x\n"
2869                         "  r4   0x%08x r5   0x%08x r6 0x%08x r7 0x%08x\n",
2870                         le32_to_cpu(tr.type), le32_to_cpu(tr.epc),
2871                         le32_to_cpu(tr.cpsr), le32_to_cpu(tr.spsr),
2872                         le32_to_cpu(tr.r13), le32_to_cpu(tr.r14),
2873                         le32_to_cpu(tr.pc), sh->trap_addr,
2874                         le32_to_cpu(tr.r0), le32_to_cpu(tr.r1),
2875                         le32_to_cpu(tr.r2), le32_to_cpu(tr.r3),
2876                         le32_to_cpu(tr.r4), le32_to_cpu(tr.r5),
2877                         le32_to_cpu(tr.r6), le32_to_cpu(tr.r7));
2878
2879         error = simple_read_from_buffer(data+nbytes, count, &pos, buf, res);
2880         if (error < 0)
2881                 return error;
2882
2883         nbytes += error;
2884         return nbytes;
2885 }
2886
2887 static int brcmf_sdio_assert_info(struct brcmf_sdio *bus,
2888                                   struct sdpcm_shared *sh, char __user *data,
2889                                   size_t count)
2890 {
2891         int error = 0;
2892         char buf[200];
2893         char file[80] = "?";
2894         char expr[80] = "<???>";
2895         int res;
2896         loff_t pos = 0;
2897
2898         if ((sh->flags & SDPCM_SHARED_ASSERT_BUILT) == 0) {
2899                 brcmf_dbg(INFO, "firmware not built with -assert\n");
2900                 return 0;
2901         } else if ((sh->flags & SDPCM_SHARED_ASSERT) == 0) {
2902                 brcmf_dbg(INFO, "no assert in dongle\n");
2903                 return 0;
2904         }
2905
2906         sdio_claim_host(bus->sdiodev->func[1]);
2907         if (sh->assert_file_addr != 0) {
2908                 error = brcmf_sdbrcm_membytes(bus, false, sh->assert_file_addr,
2909                                               (u8 *)file, 80);
2910                 if (error < 0)
2911                         return error;
2912         }
2913         if (sh->assert_exp_addr != 0) {
2914                 error = brcmf_sdbrcm_membytes(bus, false, sh->assert_exp_addr,
2915                                               (u8 *)expr, 80);
2916                 if (error < 0)
2917                         return error;
2918         }
2919         sdio_release_host(bus->sdiodev->func[1]);
2920
2921         res = scnprintf(buf, sizeof(buf),
2922                         "dongle assert: %s:%d: assert(%s)\n",
2923                         file, sh->assert_line, expr);
2924         return simple_read_from_buffer(data, count, &pos, buf, res);
2925 }
2926
2927 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
2928 {
2929         int error;
2930         struct sdpcm_shared sh;
2931
2932         error = brcmf_sdio_readshared(bus, &sh);
2933
2934         if (error < 0)
2935                 return error;
2936
2937         if ((sh.flags & SDPCM_SHARED_ASSERT_BUILT) == 0)
2938                 brcmf_dbg(INFO, "firmware not built with -assert\n");
2939         else if (sh.flags & SDPCM_SHARED_ASSERT)
2940                 brcmf_err("assertion in dongle\n");
2941
2942         if (sh.flags & SDPCM_SHARED_TRAP)
2943                 brcmf_err("firmware trap in dongle\n");
2944
2945         return 0;
2946 }
2947
2948 static int brcmf_sdbrcm_died_dump(struct brcmf_sdio *bus, char __user *data,
2949                                   size_t count, loff_t *ppos)
2950 {
2951         int error = 0;
2952         struct sdpcm_shared sh;
2953         int nbytes = 0;
2954         loff_t pos = *ppos;
2955
2956         if (pos != 0)
2957                 return 0;
2958
2959         error = brcmf_sdio_readshared(bus, &sh);
2960         if (error < 0)
2961                 goto done;
2962
2963         error = brcmf_sdio_assert_info(bus, &sh, data, count);
2964         if (error < 0)
2965                 goto done;
2966
2967         nbytes = error;
2968         error = brcmf_sdio_trap_info(bus, &sh, data, count);
2969         if (error < 0)
2970                 goto done;
2971
2972         error += nbytes;
2973         *ppos += error;
2974 done:
2975         return error;
2976 }
2977
2978 static ssize_t brcmf_sdio_forensic_read(struct file *f, char __user *data,
2979                                         size_t count, loff_t *ppos)
2980 {
2981         struct brcmf_sdio *bus = f->private_data;
2982         int res;
2983
2984         res = brcmf_sdbrcm_died_dump(bus, data, count, ppos);
2985         if (res > 0)
2986                 *ppos += res;
2987         return (ssize_t)res;
2988 }
2989
2990 static const struct file_operations brcmf_sdio_forensic_ops = {
2991         .owner = THIS_MODULE,
2992         .open = simple_open,
2993         .read = brcmf_sdio_forensic_read
2994 };
2995
2996 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
2997 {
2998         struct brcmf_pub *drvr = bus->sdiodev->bus_if->drvr;
2999         struct dentry *dentry = brcmf_debugfs_get_devdir(drvr);
3000
3001         if (IS_ERR_OR_NULL(dentry))
3002                 return;
3003
3004         debugfs_create_file("forensics", S_IRUGO, dentry, bus,
3005                             &brcmf_sdio_forensic_ops);
3006         brcmf_debugfs_create_sdio_count(drvr, &bus->sdcnt);
3007 }
3008 #else
3009 static int brcmf_sdbrcm_checkdied(struct brcmf_sdio *bus)
3010 {
3011         return 0;
3012 }
3013
3014 static void brcmf_sdio_debugfs_create(struct brcmf_sdio *bus)
3015 {
3016 }
3017 #endif /* DEBUG */
3018
3019 static int
3020 brcmf_sdbrcm_bus_rxctl(struct device *dev, unsigned char *msg, uint msglen)
3021 {
3022         int timeleft;
3023         uint rxlen = 0;
3024         bool pending;
3025         u8 *buf;
3026         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3027         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3028         struct brcmf_sdio *bus = sdiodev->bus;
3029
3030         brcmf_dbg(TRACE, "Enter\n");
3031
3032         /* Wait until control frame is available */
3033         timeleft = brcmf_sdbrcm_dcmd_resp_wait(bus, &bus->rxlen, &pending);
3034
3035         spin_lock_bh(&bus->rxctl_lock);
3036         rxlen = bus->rxlen;
3037         memcpy(msg, bus->rxctl, min(msglen, rxlen));
3038         bus->rxctl = NULL;
3039         buf = bus->rxctl_orig;
3040         bus->rxctl_orig = NULL;
3041         bus->rxlen = 0;
3042         spin_unlock_bh(&bus->rxctl_lock);
3043         vfree(buf);
3044
3045         if (rxlen) {
3046                 brcmf_dbg(CTL, "resumed on rxctl frame, got %d expected %d\n",
3047                           rxlen, msglen);
3048         } else if (timeleft == 0) {
3049                 brcmf_err("resumed on timeout\n");
3050                 brcmf_sdbrcm_checkdied(bus);
3051         } else if (pending) {
3052                 brcmf_dbg(CTL, "cancelled\n");
3053                 return -ERESTARTSYS;
3054         } else {
3055                 brcmf_dbg(CTL, "resumed for unknown reason?\n");
3056                 brcmf_sdbrcm_checkdied(bus);
3057         }
3058
3059         if (rxlen)
3060                 bus->sdcnt.rx_ctlpkts++;
3061         else
3062                 bus->sdcnt.rx_ctlerrs++;
3063
3064         return rxlen ? (int)rxlen : -ETIMEDOUT;
3065 }
3066
3067 static int brcmf_sdbrcm_write_vars(struct brcmf_sdio *bus)
3068 {
3069         int bcmerror = 0;
3070         u32 varaddr;
3071         u32 varsizew;
3072         __le32 varsizew_le;
3073 #ifdef DEBUG
3074         char *nvram_ularray;
3075 #endif                          /* DEBUG */
3076
3077         /* Even if there are no vars are to be written, we still
3078                  need to set the ramsize. */
3079         varaddr = (bus->ramsize - 4) - bus->varsz;
3080
3081         if (bus->vars) {
3082                 /* Write the vars list */
3083                 bcmerror = brcmf_sdbrcm_membytes(bus, true, varaddr,
3084                                                  bus->vars, bus->varsz);
3085 #ifdef DEBUG
3086                 /* Verify NVRAM bytes */
3087                 brcmf_dbg(INFO, "Compare NVRAM dl & ul; varsize=%d\n",
3088                           bus->varsz);
3089                 nvram_ularray = kmalloc(bus->varsz, GFP_ATOMIC);
3090                 if (!nvram_ularray)
3091                         return -ENOMEM;
3092
3093                 /* Upload image to verify downloaded contents. */
3094                 memset(nvram_ularray, 0xaa, bus->varsz);
3095
3096                 /* Read the vars list to temp buffer for comparison */
3097                 bcmerror = brcmf_sdbrcm_membytes(bus, false, varaddr,
3098                                                  nvram_ularray, bus->varsz);
3099                 if (bcmerror) {
3100                         brcmf_err("error %d on reading %d nvram bytes at 0x%08x\n",
3101                                   bcmerror, bus->varsz, varaddr);
3102                 }
3103                 /* Compare the org NVRAM with the one read from RAM */
3104                 if (memcmp(bus->vars, nvram_ularray, bus->varsz))
3105                         brcmf_err("Downloaded NVRAM image is corrupted\n");
3106                 else
3107                         brcmf_err("Download/Upload/Compare of NVRAM ok\n");
3108
3109                 kfree(nvram_ularray);
3110 #endif                          /* DEBUG */
3111         }
3112
3113         /* adjust to the user specified RAM */
3114         brcmf_dbg(INFO, "Physical memory size: %d\n", bus->ramsize);
3115         brcmf_dbg(INFO, "Vars are at %d, orig varsize is %d\n",
3116                   varaddr, bus->varsz);
3117
3118         /*
3119          * Determine the length token:
3120          * Varsize, converted to words, in lower 16-bits, checksum
3121          * in upper 16-bits.
3122          */
3123         if (bcmerror) {
3124                 varsizew = 0;
3125                 varsizew_le = cpu_to_le32(0);
3126         } else {
3127                 varsizew = bus->varsz / 4;
3128                 varsizew = (~varsizew << 16) | (varsizew & 0x0000FFFF);
3129                 varsizew_le = cpu_to_le32(varsizew);
3130         }
3131
3132         brcmf_dbg(INFO, "New varsize is %d, length token=0x%08x\n",
3133                   bus->varsz, varsizew);
3134
3135         /* Write the length token to the last word */
3136         bcmerror = brcmf_sdbrcm_membytes(bus, true, (bus->ramsize - 4),
3137                                          (u8 *)&varsizew_le, 4);
3138
3139         return bcmerror;
3140 }
3141
3142 static int brcmf_sdbrcm_download_state(struct brcmf_sdio *bus, bool enter)
3143 {
3144         int bcmerror = 0;
3145         struct chip_info *ci = bus->ci;
3146
3147         /* To enter download state, disable ARM and reset SOCRAM.
3148          * To exit download state, simply reset ARM (default is RAM boot).
3149          */
3150         if (enter) {
3151                 bus->alp_only = true;
3152
3153                 ci->coredisable(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
3154
3155                 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM);
3156
3157                 /* Clear the top bit of memory */
3158                 if (bus->ramsize) {
3159                         u32 zeros = 0;
3160                         brcmf_sdbrcm_membytes(bus, true, bus->ramsize - 4,
3161                                          (u8 *)&zeros, 4);
3162                 }
3163         } else {
3164                 if (!ci->iscoreup(bus->sdiodev, ci, BCMA_CORE_INTERNAL_MEM)) {
3165                         brcmf_err("SOCRAM core is down after reset?\n");
3166                         bcmerror = -EBADE;
3167                         goto fail;
3168                 }
3169
3170                 bcmerror = brcmf_sdbrcm_write_vars(bus);
3171                 if (bcmerror) {
3172                         brcmf_err("no vars written to RAM\n");
3173                         bcmerror = 0;
3174                 }
3175
3176                 w_sdreg32(bus, 0xFFFFFFFF,
3177                           offsetof(struct sdpcmd_regs, intstatus));
3178
3179                 ci->resetcore(bus->sdiodev, ci, BCMA_CORE_ARM_CM3);
3180
3181                 /* Allow HT Clock now that the ARM is running. */
3182                 bus->alp_only = false;
3183
3184                 bus->sdiodev->bus_if->state = BRCMF_BUS_LOAD;
3185         }
3186 fail:
3187         return bcmerror;
3188 }
3189
3190 static int brcmf_sdbrcm_get_image(char *buf, int len, struct brcmf_sdio *bus)
3191 {
3192         if (bus->firmware->size < bus->fw_ptr + len)
3193                 len = bus->firmware->size - bus->fw_ptr;
3194
3195         memcpy(buf, &bus->firmware->data[bus->fw_ptr], len);
3196         bus->fw_ptr += len;
3197         return len;
3198 }
3199
3200 static int brcmf_sdbrcm_download_code_file(struct brcmf_sdio *bus)
3201 {
3202         int offset = 0;
3203         uint len;
3204         u8 *memblock = NULL, *memptr;
3205         int ret;
3206
3207         brcmf_dbg(INFO, "Enter\n");
3208
3209         ret = request_firmware(&bus->firmware, BRCMF_SDIO_FW_NAME,
3210                                &bus->sdiodev->func[2]->dev);
3211         if (ret) {
3212                 brcmf_err("Fail to request firmware %d\n", ret);
3213                 return ret;
3214         }
3215         bus->fw_ptr = 0;
3216
3217         memptr = memblock = kmalloc(MEMBLOCK + BRCMF_SDALIGN, GFP_ATOMIC);
3218         if (memblock == NULL) {
3219                 ret = -ENOMEM;
3220                 goto err;
3221         }
3222         if ((u32)(unsigned long)memblock % BRCMF_SDALIGN)
3223                 memptr += (BRCMF_SDALIGN -
3224                            ((u32)(unsigned long)memblock % BRCMF_SDALIGN));
3225
3226         /* Download image */
3227         while ((len =
3228                 brcmf_sdbrcm_get_image((char *)memptr, MEMBLOCK, bus))) {
3229                 ret = brcmf_sdbrcm_membytes(bus, true, offset, memptr, len);
3230                 if (ret) {
3231                         brcmf_err("error %d on writing %d membytes at 0x%08x\n",
3232                                   ret, MEMBLOCK, offset);
3233                         goto err;
3234                 }
3235
3236                 offset += MEMBLOCK;
3237         }
3238
3239 err:
3240         kfree(memblock);
3241
3242         release_firmware(bus->firmware);
3243         bus->fw_ptr = 0;
3244
3245         return ret;
3246 }
3247
3248 /*
3249  * ProcessVars:Takes a buffer of "<var>=<value>\n" lines read from a file
3250  * and ending in a NUL.
3251  * Removes carriage returns, empty lines, comment lines, and converts
3252  * newlines to NULs.
3253  * Shortens buffer as needed and pads with NULs.  End of buffer is marked
3254  * by two NULs.
3255 */
3256
3257 static int brcmf_process_nvram_vars(struct brcmf_sdio *bus)
3258 {
3259         char *varbuf;
3260         char *dp;
3261         bool findNewline;
3262         int column;
3263         int ret = 0;
3264         uint buf_len, n, len;
3265
3266         len = bus->firmware->size;
3267         varbuf = vmalloc(len);
3268         if (!varbuf)
3269                 return -ENOMEM;
3270
3271         memcpy(varbuf, bus->firmware->data, len);
3272         dp = varbuf;
3273
3274         findNewline = false;
3275         column = 0;
3276
3277         for (n = 0; n < len; n++) {
3278                 if (varbuf[n] == 0)
3279                         break;
3280                 if (varbuf[n] == '\r')
3281                         continue;
3282                 if (findNewline && varbuf[n] != '\n')
3283                         continue;
3284                 findNewline = false;
3285                 if (varbuf[n] == '#') {
3286                         findNewline = true;
3287                         continue;
3288                 }
3289                 if (varbuf[n] == '\n') {
3290                         if (column == 0)
3291                                 continue;
3292                         *dp++ = 0;
3293                         column = 0;
3294                         continue;
3295                 }
3296                 *dp++ = varbuf[n];
3297                 column++;
3298         }
3299         buf_len = dp - varbuf;
3300         while (dp < varbuf + n)
3301                 *dp++ = 0;
3302
3303         kfree(bus->vars);
3304         /* roundup needed for download to device */
3305         bus->varsz = roundup(buf_len + 1, 4);
3306         bus->vars = kmalloc(bus->varsz, GFP_KERNEL);
3307         if (bus->vars == NULL) {
3308                 bus->varsz = 0;
3309                 ret = -ENOMEM;
3310                 goto err;
3311         }
3312
3313         /* copy the processed variables and add null termination */
3314         memcpy(bus->vars, varbuf, buf_len);
3315         bus->vars[buf_len] = 0;
3316 err:
3317         vfree(varbuf);
3318         return ret;
3319 }
3320
3321 static int brcmf_sdbrcm_download_nvram(struct brcmf_sdio *bus)
3322 {
3323         int ret;
3324
3325         if (bus->sdiodev->bus_if->drvr_up)
3326                 return -EISCONN;
3327
3328         ret = request_firmware(&bus->firmware, BRCMF_SDIO_NV_NAME,
3329                                &bus->sdiodev->func[2]->dev);
3330         if (ret) {
3331                 brcmf_err("Fail to request nvram %d\n", ret);
3332                 return ret;
3333         }
3334
3335         ret = brcmf_process_nvram_vars(bus);
3336
3337         release_firmware(bus->firmware);
3338
3339         return ret;
3340 }
3341
3342 static int _brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3343 {
3344         int bcmerror = -1;
3345
3346         /* Keep arm in reset */
3347         if (brcmf_sdbrcm_download_state(bus, true)) {
3348                 brcmf_err("error placing ARM core in reset\n");
3349                 goto err;
3350         }
3351
3352         /* External image takes precedence if specified */
3353         if (brcmf_sdbrcm_download_code_file(bus)) {
3354                 brcmf_err("dongle image file download failed\n");
3355                 goto err;
3356         }
3357
3358         /* External nvram takes precedence if specified */
3359         if (brcmf_sdbrcm_download_nvram(bus))
3360                 brcmf_err("dongle nvram file download failed\n");
3361
3362         /* Take arm out of reset */
3363         if (brcmf_sdbrcm_download_state(bus, false)) {
3364                 brcmf_err("error getting out of ARM core reset\n");
3365                 goto err;
3366         }
3367
3368         bcmerror = 0;
3369
3370 err:
3371         return bcmerror;
3372 }
3373
3374 static bool
3375 brcmf_sdbrcm_download_firmware(struct brcmf_sdio *bus)
3376 {
3377         bool ret;
3378
3379         sdio_claim_host(bus->sdiodev->func[1]);
3380
3381         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3382
3383         ret = _brcmf_sdbrcm_download_firmware(bus) == 0;
3384
3385         brcmf_sdbrcm_clkctl(bus, CLK_SDONLY, false);
3386
3387         sdio_release_host(bus->sdiodev->func[1]);
3388
3389         return ret;
3390 }
3391
3392 static int brcmf_sdbrcm_bus_init(struct device *dev)
3393 {
3394         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
3395         struct brcmf_sdio_dev *sdiodev = bus_if->bus_priv.sdio;
3396         struct brcmf_sdio *bus = sdiodev->bus;
3397         unsigned long timeout;
3398         u8 ready, enable;
3399         int err, ret = 0;
3400         u8 saveclk;
3401
3402         brcmf_dbg(TRACE, "Enter\n");
3403
3404         /* try to download image and nvram to the dongle */
3405         if (bus_if->state == BRCMF_BUS_DOWN) {
3406                 if (!(brcmf_sdbrcm_download_firmware(bus)))
3407                         return -1;
3408         }
3409
3410         if (!bus->sdiodev->bus_if->drvr)
3411                 return 0;
3412
3413         /* Start the watchdog timer */
3414         bus->sdcnt.tickcnt = 0;
3415         brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3416
3417         sdio_claim_host(bus->sdiodev->func[1]);
3418
3419         /* Make sure backplane clock is on, needed to generate F2 interrupt */
3420         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3421         if (bus->clkstate != CLK_AVAIL)
3422                 goto exit;
3423
3424         /* Force clocks on backplane to be sure F2 interrupt propagates */
3425         saveclk = brcmf_sdio_regrb(bus->sdiodev,
3426                                    SBSDIO_FUNC1_CHIPCLKCSR, &err);
3427         if (!err) {
3428                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3429                                  (saveclk | SBSDIO_FORCE_HT), &err);
3430         }
3431         if (err) {
3432                 brcmf_err("Failed to force clock for F2: err %d\n", err);
3433                 goto exit;
3434         }
3435
3436         /* Enable function 2 (frame transfers) */
3437         w_sdreg32(bus, SDPCM_PROT_VERSION << SMB_DATA_VERSION_SHIFT,
3438                   offsetof(struct sdpcmd_regs, tosbmailboxdata));
3439         enable = (SDIO_FUNC_ENABLE_1 | SDIO_FUNC_ENABLE_2);
3440
3441         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3442
3443         timeout = jiffies + msecs_to_jiffies(BRCMF_WAIT_F2RDY);
3444         ready = 0;
3445         while (enable != ready) {
3446                 ready = brcmf_sdio_regrb(bus->sdiodev,
3447                                          SDIO_CCCR_IORx, NULL);
3448                 if (time_after(jiffies, timeout))
3449                         break;
3450                 else if (time_after(jiffies, timeout - BRCMF_WAIT_F2RDY + 50))
3451                         /* prevent busy waiting if it takes too long */
3452                         msleep_interruptible(20);
3453         }
3454
3455         brcmf_dbg(INFO, "enable 0x%02x, ready 0x%02x\n", enable, ready);
3456
3457         /* If F2 successfully enabled, set core and enable interrupts */
3458         if (ready == enable) {
3459                 /* Set up the interrupt mask and enable interrupts */
3460                 bus->hostintmask = HOSTINTMASK;
3461                 w_sdreg32(bus, bus->hostintmask,
3462                           offsetof(struct sdpcmd_regs, hostintmask));
3463
3464                 brcmf_sdio_regwb(bus->sdiodev, SBSDIO_WATERMARK, 8, &err);
3465         } else {
3466                 /* Disable F2 again */
3467                 enable = SDIO_FUNC_ENABLE_1;
3468                 brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx, enable, NULL);
3469                 ret = -ENODEV;
3470         }
3471
3472         /* Restore previous clock setting */
3473         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, saveclk, &err);
3474
3475         if (ret == 0) {
3476                 ret = brcmf_sdio_intr_register(bus->sdiodev);
3477                 if (ret != 0)
3478                         brcmf_err("intr register failed:%d\n", ret);
3479         }
3480
3481         /* If we didn't come up, turn off backplane clock */
3482         if (bus_if->state != BRCMF_BUS_DATA)
3483                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3484
3485 exit:
3486         sdio_release_host(bus->sdiodev->func[1]);
3487
3488         return ret;
3489 }
3490
3491 void brcmf_sdbrcm_isr(void *arg)
3492 {
3493         struct brcmf_sdio *bus = (struct brcmf_sdio *) arg;
3494
3495         brcmf_dbg(TRACE, "Enter\n");
3496
3497         if (!bus) {
3498                 brcmf_err("bus is null pointer, exiting\n");
3499                 return;
3500         }
3501
3502         if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN) {
3503                 brcmf_err("bus is down. we have nothing to do\n");
3504                 return;
3505         }
3506         /* Count the interrupt call */
3507         bus->sdcnt.intrcount++;
3508         if (in_interrupt())
3509                 atomic_set(&bus->ipend, 1);
3510         else
3511                 if (brcmf_sdio_intr_rstatus(bus)) {
3512                         brcmf_err("failed backplane access\n");
3513                         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3514                 }
3515
3516         /* Disable additional interrupts (is this needed now)? */
3517         if (!bus->intr)
3518                 brcmf_err("isr w/o interrupt configured!\n");
3519
3520         brcmf_sdbrcm_adddpctsk(bus);
3521         queue_work(bus->brcmf_wq, &bus->datawork);
3522 }
3523
3524 static bool brcmf_sdbrcm_bus_watchdog(struct brcmf_sdio *bus)
3525 {
3526 #ifdef DEBUG
3527         struct brcmf_bus *bus_if = dev_get_drvdata(bus->sdiodev->dev);
3528 #endif  /* DEBUG */
3529         unsigned long flags;
3530
3531         brcmf_dbg(TIMER, "Enter\n");
3532
3533         /* Poll period: check device if appropriate. */
3534         if (bus->poll && (++bus->polltick >= bus->pollrate)) {
3535                 u32 intstatus = 0;
3536
3537                 /* Reset poll tick */
3538                 bus->polltick = 0;
3539
3540                 /* Check device if no interrupts */
3541                 if (!bus->intr ||
3542                     (bus->sdcnt.intrcount == bus->sdcnt.lastintrs)) {
3543
3544                         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3545                         if (list_empty(&bus->dpc_tsklst)) {
3546                                 u8 devpend;
3547                                 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3548                                                        flags);
3549                                 sdio_claim_host(bus->sdiodev->func[1]);
3550                                 devpend = brcmf_sdio_regrb(bus->sdiodev,
3551                                                            SDIO_CCCR_INTx,
3552                                                            NULL);
3553                                 sdio_release_host(bus->sdiodev->func[1]);
3554                                 intstatus =
3555                                     devpend & (INTR_STATUS_FUNC1 |
3556                                                INTR_STATUS_FUNC2);
3557                         } else {
3558                                 spin_unlock_irqrestore(&bus->dpc_tl_lock,
3559                                                        flags);
3560                         }
3561
3562                         /* If there is something, make like the ISR and
3563                                  schedule the DPC */
3564                         if (intstatus) {
3565                                 bus->sdcnt.pollcnt++;
3566                                 atomic_set(&bus->ipend, 1);
3567
3568                                 brcmf_sdbrcm_adddpctsk(bus);
3569                                 queue_work(bus->brcmf_wq, &bus->datawork);
3570                         }
3571                 }
3572
3573                 /* Update interrupt tracking */
3574                 bus->sdcnt.lastintrs = bus->sdcnt.intrcount;
3575         }
3576 #ifdef DEBUG
3577         /* Poll for console output periodically */
3578         if (bus_if && bus_if->state == BRCMF_BUS_DATA &&
3579             bus->console_interval != 0) {
3580                 bus->console.count += BRCMF_WD_POLL_MS;
3581                 if (bus->console.count >= bus->console_interval) {
3582                         bus->console.count -= bus->console_interval;
3583                         sdio_claim_host(bus->sdiodev->func[1]);
3584                         /* Make sure backplane clock is on */
3585                         brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3586                         if (brcmf_sdbrcm_readconsole(bus) < 0)
3587                                 /* stop on error */
3588                                 bus->console_interval = 0;
3589                         sdio_release_host(bus->sdiodev->func[1]);
3590                 }
3591         }
3592 #endif                          /* DEBUG */
3593
3594         /* On idle timeout clear activity flag and/or turn off clock */
3595         if ((bus->idletime > 0) && (bus->clkstate == CLK_AVAIL)) {
3596                 if (++bus->idlecount >= bus->idletime) {
3597                         bus->idlecount = 0;
3598                         if (bus->activity) {
3599                                 bus->activity = false;
3600                                 brcmf_sdbrcm_wd_timer(bus, BRCMF_WD_POLL_MS);
3601                         } else {
3602                                 sdio_claim_host(bus->sdiodev->func[1]);
3603                                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3604                                 sdio_release_host(bus->sdiodev->func[1]);
3605                         }
3606                 }
3607         }
3608
3609         return (atomic_read(&bus->ipend) > 0);
3610 }
3611
3612 static bool brcmf_sdbrcm_chipmatch(u16 chipid)
3613 {
3614         if (chipid == BCM43241_CHIP_ID)
3615                 return true;
3616         if (chipid == BCM4329_CHIP_ID)
3617                 return true;
3618         if (chipid == BCM4330_CHIP_ID)
3619                 return true;
3620         if (chipid == BCM4334_CHIP_ID)
3621                 return true;
3622         return false;
3623 }
3624
3625 static void brcmf_sdio_dataworker(struct work_struct *work)
3626 {
3627         struct brcmf_sdio *bus = container_of(work, struct brcmf_sdio,
3628                                               datawork);
3629         struct list_head *cur_hd, *tmp_hd;
3630         unsigned long flags;
3631
3632         spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3633         list_for_each_safe(cur_hd, tmp_hd, &bus->dpc_tsklst) {
3634                 spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3635
3636                 brcmf_sdbrcm_dpc(bus);
3637
3638                 spin_lock_irqsave(&bus->dpc_tl_lock, flags);
3639                 list_del(cur_hd);
3640                 kfree(cur_hd);
3641         }
3642         spin_unlock_irqrestore(&bus->dpc_tl_lock, flags);
3643 }
3644
3645 static void brcmf_sdbrcm_release_malloc(struct brcmf_sdio *bus)
3646 {
3647         brcmf_dbg(TRACE, "Enter\n");
3648
3649         kfree(bus->rxbuf);
3650         bus->rxctl = bus->rxbuf = NULL;
3651         bus->rxlen = 0;
3652
3653         kfree(bus->databuf);
3654         bus->databuf = NULL;
3655 }
3656
3657 static bool brcmf_sdbrcm_probe_malloc(struct brcmf_sdio *bus)
3658 {
3659         brcmf_dbg(TRACE, "Enter\n");
3660
3661         if (bus->sdiodev->bus_if->maxctl) {
3662                 bus->rxblen =
3663                     roundup((bus->sdiodev->bus_if->maxctl + SDPCM_HDRLEN),
3664                             ALIGNMENT) + BRCMF_SDALIGN;
3665                 bus->rxbuf = kmalloc(bus->rxblen, GFP_ATOMIC);
3666                 if (!(bus->rxbuf))
3667                         goto fail;
3668         }
3669
3670         /* Allocate buffer to receive glomed packet */
3671         bus->databuf = kmalloc(MAX_DATA_BUF, GFP_ATOMIC);
3672         if (!(bus->databuf)) {
3673                 /* release rxbuf which was already located as above */
3674                 if (!bus->rxblen)
3675                         kfree(bus->rxbuf);
3676                 goto fail;
3677         }
3678
3679         /* Align the buffer */
3680         if ((unsigned long)bus->databuf % BRCMF_SDALIGN)
3681                 bus->dataptr = bus->databuf + (BRCMF_SDALIGN -
3682                                ((unsigned long)bus->databuf % BRCMF_SDALIGN));
3683         else
3684                 bus->dataptr = bus->databuf;
3685
3686         return true;
3687
3688 fail:
3689         return false;
3690 }
3691
3692 static bool
3693 brcmf_sdbrcm_probe_attach(struct brcmf_sdio *bus, u32 regsva)
3694 {
3695         u8 clkctl = 0;
3696         int err = 0;
3697         int reg_addr;
3698         u32 reg_val;
3699         u8 idx;
3700
3701         bus->alp_only = true;
3702
3703         sdio_claim_host(bus->sdiodev->func[1]);
3704
3705         pr_debug("F1 signature read @0x18000000=0x%4x\n",
3706                  brcmf_sdio_regrl(bus->sdiodev, SI_ENUM_BASE, NULL));
3707
3708         /*
3709          * Force PLL off until brcmf_sdio_chip_attach()
3710          * programs PLL control regs
3711          */
3712
3713         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR,
3714                          BRCMF_INIT_CLKCTL1, &err);
3715         if (!err)
3716                 clkctl = brcmf_sdio_regrb(bus->sdiodev,
3717                                           SBSDIO_FUNC1_CHIPCLKCSR, &err);
3718
3719         if (err || ((clkctl & ~SBSDIO_AVBITS) != BRCMF_INIT_CLKCTL1)) {
3720                 brcmf_err("ChipClkCSR access: err %d wrote 0x%02x read 0x%02x\n",
3721                           err, BRCMF_INIT_CLKCTL1, clkctl);
3722                 goto fail;
3723         }
3724
3725         if (brcmf_sdio_chip_attach(bus->sdiodev, &bus->ci, regsva)) {
3726                 brcmf_err("brcmf_sdio_chip_attach failed!\n");
3727                 goto fail;
3728         }
3729
3730         if (!brcmf_sdbrcm_chipmatch((u16) bus->ci->chip)) {
3731                 brcmf_err("unsupported chip: 0x%04x\n", bus->ci->chip);
3732                 goto fail;
3733         }
3734
3735         brcmf_sdio_chip_drivestrengthinit(bus->sdiodev, bus->ci,
3736                                           SDIO_DRIVE_STRENGTH);
3737
3738         /* Get info on the SOCRAM cores... */
3739         bus->ramsize = bus->ci->ramsize;
3740         if (!(bus->ramsize)) {
3741                 brcmf_err("failed to find SOCRAM memory!\n");
3742                 goto fail;
3743         }
3744
3745         /* Set core control so an SDIO reset does a backplane reset */
3746         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3747         reg_addr = bus->ci->c_inf[idx].base +
3748                    offsetof(struct sdpcmd_regs, corecontrol);
3749         reg_val = brcmf_sdio_regrl(bus->sdiodev, reg_addr, NULL);
3750         brcmf_sdio_regwl(bus->sdiodev, reg_addr, reg_val | CC_BPRESEN, NULL);
3751
3752         sdio_release_host(bus->sdiodev->func[1]);
3753
3754         brcmu_pktq_init(&bus->txq, (PRIOMASK + 1), TXQLEN);
3755
3756         /* Locate an appropriately-aligned portion of hdrbuf */
3757         bus->rxhdr = (u8 *) roundup((unsigned long)&bus->hdrbuf[0],
3758                                     BRCMF_SDALIGN);
3759
3760         /* Set the poll and/or interrupt flags */
3761         bus->intr = true;
3762         bus->poll = false;
3763         if (bus->poll)
3764                 bus->pollrate = 1;
3765
3766         return true;
3767
3768 fail:
3769         sdio_release_host(bus->sdiodev->func[1]);
3770         return false;
3771 }
3772
3773 static bool brcmf_sdbrcm_probe_init(struct brcmf_sdio *bus)
3774 {
3775         brcmf_dbg(TRACE, "Enter\n");
3776
3777         sdio_claim_host(bus->sdiodev->func[1]);
3778
3779         /* Disable F2 to clear any intermediate frame state on the dongle */
3780         brcmf_sdio_regwb(bus->sdiodev, SDIO_CCCR_IOEx,
3781                          SDIO_FUNC_ENABLE_1, NULL);
3782
3783         bus->sdiodev->bus_if->state = BRCMF_BUS_DOWN;
3784         bus->rxflow = false;
3785
3786         /* Done with backplane-dependent accesses, can drop clock... */
3787         brcmf_sdio_regwb(bus->sdiodev, SBSDIO_FUNC1_CHIPCLKCSR, 0, NULL);
3788
3789         sdio_release_host(bus->sdiodev->func[1]);
3790
3791         /* ...and initialize clock/power states */
3792         bus->clkstate = CLK_SDONLY;
3793         bus->idletime = BRCMF_IDLE_INTERVAL;
3794         bus->idleclock = BRCMF_IDLE_ACTIVE;
3795
3796         /* Query the F2 block size, set roundup accordingly */
3797         bus->blocksize = bus->sdiodev->func[2]->cur_blksize;
3798         bus->roundup = min(max_roundup, bus->blocksize);
3799
3800         /* bus module does not support packet chaining */
3801         bus->use_rxchain = false;
3802         bus->sd_rxchain = false;
3803
3804         return true;
3805 }
3806
3807 static int
3808 brcmf_sdbrcm_watchdog_thread(void *data)
3809 {
3810         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3811
3812         allow_signal(SIGTERM);
3813         /* Run until signal received */
3814         while (1) {
3815                 if (kthread_should_stop())
3816                         break;
3817                 if (!wait_for_completion_interruptible(&bus->watchdog_wait)) {
3818                         brcmf_sdbrcm_bus_watchdog(bus);
3819                         /* Count the tick for reference */
3820                         bus->sdcnt.tickcnt++;
3821                 } else
3822                         break;
3823         }
3824         return 0;
3825 }
3826
3827 static void
3828 brcmf_sdbrcm_watchdog(unsigned long data)
3829 {
3830         struct brcmf_sdio *bus = (struct brcmf_sdio *)data;
3831
3832         if (bus->watchdog_tsk) {
3833                 complete(&bus->watchdog_wait);
3834                 /* Reschedule the watchdog */
3835                 if (bus->wd_timer_valid)
3836                         mod_timer(&bus->timer,
3837                                   jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
3838         }
3839 }
3840
3841 static void brcmf_sdbrcm_release_dongle(struct brcmf_sdio *bus)
3842 {
3843         brcmf_dbg(TRACE, "Enter\n");
3844
3845         if (bus->ci) {
3846                 sdio_claim_host(bus->sdiodev->func[1]);
3847                 brcmf_sdbrcm_clkctl(bus, CLK_AVAIL, false);
3848                 brcmf_sdbrcm_clkctl(bus, CLK_NONE, false);
3849                 sdio_release_host(bus->sdiodev->func[1]);
3850                 brcmf_sdio_chip_detach(&bus->ci);
3851                 if (bus->vars && bus->varsz)
3852                         kfree(bus->vars);
3853                 bus->vars = NULL;
3854         }
3855
3856         brcmf_dbg(TRACE, "Disconnected\n");
3857 }
3858
3859 /* Detach and free everything */
3860 static void brcmf_sdbrcm_release(struct brcmf_sdio *bus)
3861 {
3862         brcmf_dbg(TRACE, "Enter\n");
3863
3864         if (bus) {
3865                 /* De-register interrupt handler */
3866                 brcmf_sdio_intr_unregister(bus->sdiodev);
3867
3868                 cancel_work_sync(&bus->datawork);
3869                 if (bus->brcmf_wq)
3870                         destroy_workqueue(bus->brcmf_wq);
3871
3872                 if (bus->sdiodev->bus_if->drvr) {
3873                         brcmf_detach(bus->sdiodev->dev);
3874                         brcmf_sdbrcm_release_dongle(bus);
3875                 }
3876
3877                 brcmf_sdbrcm_release_malloc(bus);
3878
3879                 kfree(bus);
3880         }
3881
3882         brcmf_dbg(TRACE, "Disconnected\n");
3883 }
3884
3885 static struct brcmf_bus_ops brcmf_sdio_bus_ops = {
3886         .stop = brcmf_sdbrcm_bus_stop,
3887         .init = brcmf_sdbrcm_bus_init,
3888         .txdata = brcmf_sdbrcm_bus_txdata,
3889         .txctl = brcmf_sdbrcm_bus_txctl,
3890         .rxctl = brcmf_sdbrcm_bus_rxctl,
3891 };
3892
3893 void *brcmf_sdbrcm_probe(u32 regsva, struct brcmf_sdio_dev *sdiodev)
3894 {
3895         int ret;
3896         struct brcmf_sdio *bus;
3897         struct brcmf_bus_dcmd *dlst;
3898         u32 dngl_txglom;
3899         u32 dngl_txglomalign;
3900         u8 idx;
3901
3902         brcmf_dbg(TRACE, "Enter\n");
3903
3904         /* We make an assumption about address window mappings:
3905          * regsva == SI_ENUM_BASE*/
3906
3907         /* Allocate private bus interface state */
3908         bus = kzalloc(sizeof(struct brcmf_sdio), GFP_ATOMIC);
3909         if (!bus)
3910                 goto fail;
3911
3912         bus->sdiodev = sdiodev;
3913         sdiodev->bus = bus;
3914         skb_queue_head_init(&bus->glom);
3915         bus->txbound = BRCMF_TXBOUND;
3916         bus->rxbound = BRCMF_RXBOUND;
3917         bus->txminmax = BRCMF_TXMINMAX;
3918         bus->tx_seq = SDPCM_SEQUENCE_WRAP - 1;
3919
3920         INIT_WORK(&bus->datawork, brcmf_sdio_dataworker);
3921         bus->brcmf_wq = create_singlethread_workqueue("brcmf_wq");
3922         if (bus->brcmf_wq == NULL) {
3923                 brcmf_err("insufficient memory to create txworkqueue\n");
3924                 goto fail;
3925         }
3926
3927         /* attempt to attach to the dongle */
3928         if (!(brcmf_sdbrcm_probe_attach(bus, regsva))) {
3929                 brcmf_err("brcmf_sdbrcm_probe_attach failed\n");
3930                 goto fail;
3931         }
3932
3933         spin_lock_init(&bus->rxctl_lock);
3934         spin_lock_init(&bus->txqlock);
3935         init_waitqueue_head(&bus->ctrl_wait);
3936         init_waitqueue_head(&bus->dcmd_resp_wait);
3937
3938         /* Set up the watchdog timer */
3939         init_timer(&bus->timer);
3940         bus->timer.data = (unsigned long)bus;
3941         bus->timer.function = brcmf_sdbrcm_watchdog;
3942
3943         /* Initialize watchdog thread */
3944         init_completion(&bus->watchdog_wait);
3945         bus->watchdog_tsk = kthread_run(brcmf_sdbrcm_watchdog_thread,
3946                                         bus, "brcmf_watchdog");
3947         if (IS_ERR(bus->watchdog_tsk)) {
3948                 pr_warn("brcmf_watchdog thread failed to start\n");
3949                 bus->watchdog_tsk = NULL;
3950         }
3951         /* Initialize DPC thread */
3952         INIT_LIST_HEAD(&bus->dpc_tsklst);
3953         spin_lock_init(&bus->dpc_tl_lock);
3954
3955         /* Assign bus interface call back */
3956         bus->sdiodev->bus_if->dev = bus->sdiodev->dev;
3957         bus->sdiodev->bus_if->ops = &brcmf_sdio_bus_ops;
3958
3959         /* Attach to the brcmf/OS/network interface */
3960         ret = brcmf_attach(SDPCM_RESERVE, bus->sdiodev->dev);
3961         if (ret != 0) {
3962                 brcmf_err("brcmf_attach failed\n");
3963                 goto fail;
3964         }
3965
3966         /* Allocate buffers */
3967         if (!(brcmf_sdbrcm_probe_malloc(bus))) {
3968                 brcmf_err("brcmf_sdbrcm_probe_malloc failed\n");
3969                 goto fail;
3970         }
3971
3972         if (!(brcmf_sdbrcm_probe_init(bus))) {
3973                 brcmf_err("brcmf_sdbrcm_probe_init failed\n");
3974                 goto fail;
3975         }
3976
3977         brcmf_sdio_debugfs_create(bus);
3978         brcmf_dbg(INFO, "completed!!\n");
3979
3980         /* sdio bus core specific dcmd */
3981         idx = brcmf_sdio_chip_getinfidx(bus->ci, BCMA_CORE_SDIO_DEV);
3982         dlst = kzalloc(sizeof(struct brcmf_bus_dcmd), GFP_KERNEL);
3983         if (dlst) {
3984                 if (bus->ci->c_inf[idx].rev < 12) {
3985                         /* for sdio core rev < 12, disable txgloming */
3986                         dngl_txglom = 0;
3987                         dlst->name = "bus:txglom";
3988                         dlst->param = (char *)&dngl_txglom;
3989                         dlst->param_len = sizeof(u32);
3990                 } else {
3991                         /* otherwise, set txglomalign */
3992                         dngl_txglomalign = bus->sdiodev->bus_if->align;
3993                         dlst->name = "bus:txglomalign";
3994                         dlst->param = (char *)&dngl_txglomalign;
3995                         dlst->param_len = sizeof(u32);
3996                 }
3997                 list_add(&dlst->list, &bus->sdiodev->bus_if->dcmd_list);
3998         }
3999
4000         /* if firmware path present try to download and bring up bus */
4001         ret = brcmf_bus_start(bus->sdiodev->dev);
4002         if (ret != 0) {
4003                 brcmf_err("dongle is not responding\n");
4004                 goto fail;
4005         }
4006
4007         return bus;
4008
4009 fail:
4010         brcmf_sdbrcm_release(bus);
4011         return NULL;
4012 }
4013
4014 void brcmf_sdbrcm_disconnect(void *ptr)
4015 {
4016         struct brcmf_sdio *bus = (struct brcmf_sdio *)ptr;
4017
4018         brcmf_dbg(TRACE, "Enter\n");
4019
4020         if (bus)
4021                 brcmf_sdbrcm_release(bus);
4022
4023         brcmf_dbg(TRACE, "Disconnected\n");
4024 }
4025
4026 void
4027 brcmf_sdbrcm_wd_timer(struct brcmf_sdio *bus, uint wdtick)
4028 {
4029         /* Totally stop the timer */
4030         if (!wdtick && bus->wd_timer_valid) {
4031                 del_timer_sync(&bus->timer);
4032                 bus->wd_timer_valid = false;
4033                 bus->save_ms = wdtick;
4034                 return;
4035         }
4036
4037         /* don't start the wd until fw is loaded */
4038         if (bus->sdiodev->bus_if->state == BRCMF_BUS_DOWN)
4039                 return;
4040
4041         if (wdtick) {
4042                 if (bus->save_ms != BRCMF_WD_POLL_MS) {
4043                         if (bus->wd_timer_valid)
4044                                 /* Stop timer and restart at new value */
4045                                 del_timer_sync(&bus->timer);
4046
4047                         /* Create timer again when watchdog period is
4048                            dynamically changed or in the first instance
4049                          */
4050                         bus->timer.expires =
4051                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000;
4052                         add_timer(&bus->timer);
4053
4054                 } else {
4055                         /* Re arm the timer, at last watchdog period */
4056                         mod_timer(&bus->timer,
4057                                 jiffies + BRCMF_WD_POLL_MS * HZ / 1000);
4058                 }
4059
4060                 bus->wd_timer_valid = true;
4061                 bus->save_ms = wdtick;
4062         }
4063 }