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

   1 /*
   2  * Copyright (c) 2011 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 #include <linux/init.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/kthread.h>
  21 #include <linux/slab.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/ethtool.h>
  26 #include <linux/fcntl.h>
  27 #include <linux/fs.h>
  28 #include <linux/uaccess.h>
  29 #include <linux/firmware.h>
  30 #include <linux/usb.h>
  31 #include <linux/vmalloc.h>
  32 #include <net/cfg80211.h>
  33
  34 #include <defs.h>
  35 #include <brcmu_utils.h>
  36 #include <brcmu_wifi.h>
  37 #include <dhd_bus.h>
  38 #include <dhd_dbg.h>
  39
  40 #include "usb_rdl.h"
  41 #include "usb.h"
  42
  43 #define IOCTL_RESP_TIMEOUT  2000
  44
  45 #define BRCMF_USB_SYNC_TIMEOUT          300     /* ms */
  46 #define BRCMF_USB_DLIMAGE_SPINWAIT      100     /* in unit of ms */
  47 #define BRCMF_USB_DLIMAGE_LIMIT         500     /* spinwait limit (ms) */
  48
  49 #define BRCMF_POSTBOOT_ID               0xA123  /* ID to detect if dongle
  50                                                    has boot up */
  51 #define BRCMF_USB_RESETCFG_SPINWAIT     1       /* wait after resetcfg (ms) */
  52
  53 #define BRCMF_USB_NRXQ  50
  54 #define BRCMF_USB_NTXQ  50
  55
  56 #define CONFIGDESC(usb)         (&((usb)->actconfig)->desc)
  57 #define IFPTR(usb, idx)         ((usb)->actconfig->interface[(idx)])
  58 #define IFALTS(usb, idx)        (IFPTR((usb), (idx))->altsetting[0])
  59 #define IFDESC(usb, idx)        IFALTS((usb), (idx)).desc
  60 #define IFEPDESC(usb, idx, ep)  (IFALTS((usb), (idx)).endpoint[(ep)]).desc
  61
  62 #define CONTROL_IF              0
  63 #define BULK_IF                 0
  64
  65 #define BRCMF_USB_CBCTL_WRITE   0
  66 #define BRCMF_USB_CBCTL_READ    1
  67 #define BRCMF_USB_MAX_PKT_SIZE  1600
  68
  69 #define BRCMF_USB_43143_FW_NAME "brcm/brcmfmac43143.bin"
  70 #define BRCMF_USB_43236_FW_NAME "brcm/brcmfmac43236b.bin"
  71 #define BRCMF_USB_43242_FW_NAME "brcm/brcmfmac43242a.bin"
  72
  73 enum usbdev_suspend_state {
  74         USBOS_SUSPEND_STATE_DEVICE_ACTIVE = 0, /* Device is busy, won't allow
  75                                                   suspend */
  76         USBOS_SUSPEND_STATE_SUSPEND_PENDING,    /* Device is idle, can be
  77                                                  * suspended. Wating PM to
  78                                                  * suspend the device
  79                                                  */
  80         USBOS_SUSPEND_STATE_SUSPENDED   /* Device suspended */
  81 };
  82
  83 struct brcmf_usb_image {
  84         struct list_head list;
  85         s8 *fwname;
  86         u8 *image;
  87         int image_len;
  88 };
  89 static struct list_head fw_image_list;
  90
  91 struct intr_transfer_buf {
  92         u32 notification;
  93         u32 reserved;
  94 };
  95
  96 struct brcmf_usbdev_info {
  97         struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
  98         spinlock_t qlock;
  99         struct list_head rx_freeq;
 100         struct list_head rx_postq;
 101         struct list_head tx_freeq;
 102         struct list_head tx_postq;
 103         enum usbdev_suspend_state suspend_state;
 104         uint rx_pipe, tx_pipe, intr_pipe, rx_pipe2;
 105
 106         bool activity;
 107         int rx_low_watermark;
 108         int tx_low_watermark;
 109         int tx_high_watermark;
 110         int tx_freecount;
 111         bool tx_flowblock;
 112
 113         struct brcmf_usbreq *tx_reqs;
 114         struct brcmf_usbreq *rx_reqs;
 115
 116         u8 *image;      /* buffer for combine fw and nvram */
 117         int image_len;
 118
 119         wait_queue_head_t wait;
 120         bool waitdone;
 121         int sync_urb_status;
 122
 123         struct usb_device *usbdev;
 124         struct device *dev;
 125
 126         int ctl_in_pipe, ctl_out_pipe;
 127         struct urb *ctl_urb; /* URB for control endpoint */
 128         struct usb_ctrlrequest ctl_write;
 129         struct usb_ctrlrequest ctl_read;
 130         u32 ctl_urb_actual_length;
 131         int ctl_urb_status;
 132         int ctl_completed;
 133         wait_queue_head_t ioctl_resp_wait;
 134         wait_queue_head_t ctrl_wait;
 135         ulong ctl_op;
 136
 137         struct urb *bulk_urb; /* used for FW download */
 138         struct urb *intr_urb; /* URB for interrupt endpoint */
 139         int intr_size;          /* Size of interrupt message */
 140         int interval;           /* Interrupt polling interval */
 141         struct intr_transfer_buf intr; /* Data buffer for interrupt endpoint */
 142 };
 143
 144 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 145                                 struct brcmf_usbreq  *req);
 146
 147 MODULE_AUTHOR("Broadcom Corporation");
 148 MODULE_DESCRIPTION("Broadcom 802.11n wireless LAN fullmac usb driver.");
 149 MODULE_SUPPORTED_DEVICE("Broadcom 802.11n WLAN fullmac usb cards");
 150 MODULE_LICENSE("Dual BSD/GPL");
 151
 152 static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
 153 {
 154         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 155         return bus_if->bus_priv.usb;
 156 }
 157
 158 static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
 159 {
 160         return brcmf_usb_get_buspub(dev)->devinfo;
 161 }
 162
 163 static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
 164 {
 165         return wait_event_timeout(devinfo->ioctl_resp_wait,
 166                                   devinfo->ctl_completed,
 167                                   msecs_to_jiffies(IOCTL_RESP_TIMEOUT));
 168 }
 169
 170 static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
 171 {
 172         if (waitqueue_active(&devinfo->ioctl_resp_wait))
 173                 wake_up(&devinfo->ioctl_resp_wait);
 174 }
 175
 176 static void
 177 brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
 178 {
 179
 180         if (unlikely(devinfo == NULL))
 181                 return;
 182
 183         if (type == BRCMF_USB_CBCTL_READ) {
 184                 if (status == 0)
 185                         devinfo->bus_pub.stats.rx_ctlpkts++;
 186                 else
 187                         devinfo->bus_pub.stats.rx_ctlerrs++;
 188         } else if (type == BRCMF_USB_CBCTL_WRITE) {
 189                 if (status == 0)
 190                         devinfo->bus_pub.stats.tx_ctlpkts++;
 191                 else
 192                         devinfo->bus_pub.stats.tx_ctlerrs++;
 193         }
 194
 195         devinfo->ctl_urb_status = status;
 196         devinfo->ctl_completed = true;
 197         brcmf_usb_ioctl_resp_wake(devinfo);
 198 }
 199
 200 static void
 201 brcmf_usb_ctlread_complete(struct urb *urb)
 202 {
 203         struct brcmf_usbdev_info *devinfo =
 204                 (struct brcmf_usbdev_info *)urb->context;
 205
 206         devinfo->ctl_urb_actual_length = urb->actual_length;
 207         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
 208                 urb->status);
 209 }
 210
 211 static void
 212 brcmf_usb_ctlwrite_complete(struct urb *urb)
 213 {
 214         struct brcmf_usbdev_info *devinfo =
 215                 (struct brcmf_usbdev_info *)urb->context;
 216
 217         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
 218                 urb->status);
 219 }
 220
 221 static int brcmf_usb_pnp(struct brcmf_usbdev_info *devinfo, uint state)
 222 {
 223         return 0;
 224 }
 225
 226 static int
 227 brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 228 {
 229         int ret;
 230         u16 size;
 231
 232         if (devinfo == NULL || buf == NULL ||
 233             len == 0 || devinfo->ctl_urb == NULL)
 234                 return -EINVAL;
 235
 236         /* If the USB/HSIC bus in sleep state, wake it up */
 237         if (devinfo->suspend_state == USBOS_SUSPEND_STATE_SUSPENDED)
 238                 if (brcmf_usb_pnp(devinfo, BCMFMAC_USB_PNP_RESUME) != 0) {
 239                         brcmf_dbg(ERROR, "Could not Resume the bus!\n");
 240                         return -EIO;
 241                 }
 242
 243         devinfo->activity = true;
 244         size = len;
 245         devinfo->ctl_write.wLength = cpu_to_le16p(&size);
 246         devinfo->ctl_urb->transfer_buffer_length = size;
 247         devinfo->ctl_urb_status = 0;
 248         devinfo->ctl_urb_actual_length = 0;
 249
 250         usb_fill_control_urb(devinfo->ctl_urb,
 251                 devinfo->usbdev,
 252                 devinfo->ctl_out_pipe,
 253                 (unsigned char *) &devinfo->ctl_write,
 254                 buf, size,
 255                 (usb_complete_t)brcmf_usb_ctlwrite_complete,
 256                 devinfo);
 257
 258         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 259         if (ret < 0)
 260                 brcmf_dbg(ERROR, "usb_submit_urb failed %d\n", ret);
 261
 262         return ret;
 263 }
 264
 265 static int
 266 brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 267 {
 268         int ret;
 269         u16 size;
 270
 271         if ((devinfo == NULL) || (buf == NULL) || (len == 0)
 272                 || (devinfo->ctl_urb == NULL))
 273                 return -EINVAL;
 274
 275         size = len;
 276         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 277         devinfo->ctl_urb->transfer_buffer_length = size;
 278
 279         devinfo->ctl_read.bRequestType = USB_DIR_IN
 280                 | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 281         devinfo->ctl_read.bRequest = 1;
 282
 283         usb_fill_control_urb(devinfo->ctl_urb,
 284                 devinfo->usbdev,
 285                 devinfo->ctl_in_pipe,
 286                 (unsigned char *) &devinfo->ctl_read,
 287                 buf, size,
 288                 (usb_complete_t)brcmf_usb_ctlread_complete,
 289                 devinfo);
 290
 291         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 292         if (ret < 0)
 293                 brcmf_dbg(ERROR, "usb_submit_urb failed %d\n", ret);
 294
 295         return ret;
 296 }
 297
 298 static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 299 {
 300         int err = 0;
 301         int timeout = 0;
 302         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 303
 304         if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
 305                 /* TODO: handle suspend/resume */
 306                 return -EIO;
 307         }
 308
 309         if (test_and_set_bit(0, &devinfo->ctl_op))
 310                 return -EIO;
 311
 312         devinfo->ctl_completed = false;
 313         err = brcmf_usb_send_ctl(devinfo, buf, len);
 314         if (err) {
 315                 brcmf_dbg(ERROR, "fail %d bytes: %d\n", err, len);
 316                 clear_bit(0, &devinfo->ctl_op);
 317                 return err;
 318         }
 319         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 320         clear_bit(0, &devinfo->ctl_op);
 321         if (!timeout) {
 322                 brcmf_dbg(ERROR, "Txctl wait timed out\n");
 323                 err = -EIO;
 324         }
 325         return err;
 326 }
 327
 328 static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 329 {
 330         int err = 0;
 331         int timeout = 0;
 332         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 333
 334         if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
 335                 /* TODO: handle suspend/resume */
 336                 return -EIO;
 337         }
 338         if (test_and_set_bit(0, &devinfo->ctl_op))
 339                 return -EIO;
 340
 341         devinfo->ctl_completed = false;
 342         err = brcmf_usb_recv_ctl(devinfo, buf, len);
 343         if (err) {
 344                 brcmf_dbg(ERROR, "fail %d bytes: %d\n", err, len);
 345                 clear_bit(0, &devinfo->ctl_op);
 346                 return err;
 347         }
 348         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 349         err = devinfo->ctl_urb_status;
 350         clear_bit(0, &devinfo->ctl_op);
 351         if (!timeout) {
 352                 brcmf_dbg(ERROR, "rxctl wait timed out\n");
 353                 err = -EIO;
 354         }
 355         if (!err)
 356                 return devinfo->ctl_urb_actual_length;
 357         else
 358                 return err;
 359 }
 360
 361 static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
 362                                           struct list_head *q, int *counter)
 363 {
 364         unsigned long flags;
 365         struct brcmf_usbreq  *req;
 366         spin_lock_irqsave(&devinfo->qlock, flags);
 367         if (list_empty(q)) {
 368                 spin_unlock_irqrestore(&devinfo->qlock, flags);
 369                 return NULL;
 370         }
 371         req = list_entry(q->next, struct brcmf_usbreq, list);
 372         list_del_init(q->next);
 373         if (counter)
 374                 (*counter)--;
 375         spin_unlock_irqrestore(&devinfo->qlock, flags);
 376         return req;
 377
 378 }
 379
 380 static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
 381                           struct list_head *q, struct brcmf_usbreq *req,
 382                           int *counter)
 383 {
 384         unsigned long flags;
 385         spin_lock_irqsave(&devinfo->qlock, flags);
 386         list_add_tail(&req->list, q);
 387         if (counter)
 388                 (*counter)++;
 389         spin_unlock_irqrestore(&devinfo->qlock, flags);
 390 }
 391
 392 static struct brcmf_usbreq *
 393 brcmf_usbdev_qinit(struct list_head *q, int qsize)
 394 {
 395         int i;
 396         struct brcmf_usbreq *req, *reqs;
 397
 398         reqs = kzalloc(sizeof(struct brcmf_usbreq) * qsize, GFP_ATOMIC);
 399         if (reqs == NULL) {
 400                 brcmf_dbg(ERROR, "fail to allocate memory!\n");
 401                 return NULL;
 402         }
 403         req = reqs;
 404
 405         for (i = 0; i < qsize; i++) {
 406                 req->urb = usb_alloc_urb(0, GFP_ATOMIC);
 407                 if (!req->urb)
 408                         goto fail;
 409
 410                 INIT_LIST_HEAD(&req->list);
 411                 list_add_tail(&req->list, q);
 412                 req++;
 413         }
 414         return reqs;
 415 fail:
 416         brcmf_dbg(ERROR, "fail!\n");
 417         while (!list_empty(q)) {
 418                 req = list_entry(q->next, struct brcmf_usbreq, list);
 419                 if (req && req->urb)
 420                         usb_free_urb(req->urb);
 421                 list_del(q->next);
 422         }
 423         return NULL;
 424
 425 }
 426
 427 static void brcmf_usb_free_q(struct list_head *q, bool pending)
 428 {
 429         struct brcmf_usbreq *req, *next;
 430         int i = 0;
 431         list_for_each_entry_safe(req, next, q, list) {
 432                 if (!req->urb) {
 433                         brcmf_dbg(ERROR, "bad req\n");
 434                         break;
 435                 }
 436                 i++;
 437                 if (pending) {
 438                         usb_kill_urb(req->urb);
 439                 } else {
 440                         usb_free_urb(req->urb);
 441                         list_del_init(&req->list);
 442                 }
 443         }
 444 }
 445
 446 static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
 447                                 struct brcmf_usbreq *req)
 448 {
 449         unsigned long flags;
 450
 451         spin_lock_irqsave(&devinfo->qlock, flags);
 452         list_del_init(&req->list);
 453         spin_unlock_irqrestore(&devinfo->qlock, flags);
 454 }
 455
 456
 457 static void brcmf_usb_tx_complete(struct urb *urb)
 458 {
 459         struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
 460         struct brcmf_usbdev_info *devinfo = req->devinfo;
 461
 462         brcmf_usb_del_fromq(devinfo, req);
 463         if (urb->status == 0)
 464                 devinfo->bus_pub.bus->dstats.tx_packets++;
 465         else
 466                 devinfo->bus_pub.bus->dstats.tx_errors++;
 467
 468         brcmf_txcomplete(devinfo->dev, req->skb, urb->status == 0);
 469
 470         brcmu_pkt_buf_free_skb(req->skb);
 471         req->skb = NULL;
 472         brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
 473         if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
 474                 devinfo->tx_flowblock) {
 475                 brcmf_txflowblock(devinfo->dev, false);
 476                 devinfo->tx_flowblock = false;
 477         }
 478 }
 479
 480 static void brcmf_usb_rx_complete(struct urb *urb)
 481 {
 482         struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
 483         struct brcmf_usbdev_info *devinfo = req->devinfo;
 484         struct sk_buff *skb;
 485         int ifidx = 0;
 486
 487         brcmf_usb_del_fromq(devinfo, req);
 488         skb = req->skb;
 489         req->skb = NULL;
 490
 491         if (urb->status == 0) {
 492                 devinfo->bus_pub.bus->dstats.rx_packets++;
 493         } else {
 494                 devinfo->bus_pub.bus->dstats.rx_errors++;
 495                 brcmu_pkt_buf_free_skb(skb);
 496                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 497                 return;
 498         }
 499
 500         if (devinfo->bus_pub.state == BCMFMAC_USB_STATE_UP) {
 501                 skb_put(skb, urb->actual_length);
 502                 if (brcmf_proto_hdrpull(devinfo->dev, &ifidx, skb) != 0) {
 503                         brcmf_dbg(ERROR, "rx protocol error\n");
 504                         brcmu_pkt_buf_free_skb(skb);
 505                         devinfo->bus_pub.bus->dstats.rx_errors++;
 506                 } else
 507                         brcmf_rx_packet(devinfo->dev, ifidx, skb);
 508                 brcmf_usb_rx_refill(devinfo, req);
 509         } else {
 510                 brcmu_pkt_buf_free_skb(skb);
 511                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 512         }
 513         return;
 514
 515 }
 516
 517 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 518                                 struct brcmf_usbreq  *req)
 519 {
 520         struct sk_buff *skb;
 521         int ret;
 522
 523         if (!req || !devinfo)
 524                 return;
 525
 526         skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
 527         if (!skb) {
 528                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 529                 return;
 530         }
 531         req->skb = skb;
 532
 533         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
 534                           skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
 535                           req);
 536         req->devinfo = devinfo;
 537         brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
 538
 539         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 540         if (ret) {
 541                 brcmf_usb_del_fromq(devinfo, req);
 542                 brcmu_pkt_buf_free_skb(req->skb);
 543                 req->skb = NULL;
 544                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 545         }
 546         return;
 547 }
 548
 549 static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
 550 {
 551         struct brcmf_usbreq *req;
 552
 553         if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
 554                 brcmf_dbg(ERROR, "bus is not up\n");
 555                 return;
 556         }
 557         while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
 558                 brcmf_usb_rx_refill(devinfo, req);
 559 }
 560
 561 static void
 562 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 563 {
 564         struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
 565         int old_state;
 566
 567
 568         if (devinfo->bus_pub.state == state)
 569                 return;
 570
 571         old_state = devinfo->bus_pub.state;
 572         brcmf_dbg(TRACE, "dbus state change from %d to to %d\n",
 573                   old_state, state);
 574
 575         /* Don't update state if it's PnP firmware re-download */
 576         if (state != BCMFMAC_USB_STATE_PNP_FWDL) /* TODO */
 577                 devinfo->bus_pub.state = state;
 578
 579         if ((old_state  == BCMFMAC_USB_STATE_SLEEP)
 580                 && (state == BCMFMAC_USB_STATE_UP)) {
 581                 brcmf_usb_rx_fill_all(devinfo);
 582         }
 583
 584         /* update state of upper layer */
 585         if (state == BCMFMAC_USB_STATE_DOWN) {
 586                 brcmf_dbg(INFO, "DBUS is down\n");
 587                 bcmf_bus->state = BRCMF_BUS_DOWN;
 588         } else {
 589                 brcmf_dbg(INFO, "DBUS current state=%d\n", state);
 590         }
 591 }
 592
 593 static void
 594 brcmf_usb_intr_complete(struct urb *urb)
 595 {
 596         struct brcmf_usbdev_info *devinfo =
 597                         (struct brcmf_usbdev_info *)urb->context;
 598         bool killed;
 599
 600         if (devinfo == NULL)
 601                 return;
 602
 603         if (unlikely(urb->status)) {
 604                 if (devinfo->suspend_state ==
 605                         USBOS_SUSPEND_STATE_SUSPEND_PENDING)
 606                         killed = true;
 607
 608                 if ((urb->status == -ENOENT && (!killed))
 609                         || urb->status == -ESHUTDOWN ||
 610                         urb->status == -ENODEV) {
 611                         brcmf_usb_state_change(devinfo, BCMFMAC_USB_STATE_DOWN);
 612                 }
 613         }
 614
 615         if (devinfo->bus_pub.state == BCMFMAC_USB_STATE_DOWN) {
 616                 brcmf_dbg(ERROR, "intr cb when DBUS down, ignoring\n");
 617                 return;
 618         }
 619
 620         if (devinfo->bus_pub.state == BCMFMAC_USB_STATE_UP)
 621                 usb_submit_urb(devinfo->intr_urb, GFP_ATOMIC);
 622 }
 623
 624 static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
 625 {
 626         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 627         struct brcmf_usbreq  *req;
 628         int ret;
 629
 630         if (devinfo->bus_pub.state != BCMFMAC_USB_STATE_UP) {
 631                 /* TODO: handle suspend/resume */
 632                 return -EIO;
 633         }
 634
 635         req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
 636                                         &devinfo->tx_freecount);
 637         if (!req) {
 638                 brcmu_pkt_buf_free_skb(skb);
 639                 brcmf_dbg(ERROR, "no req to send\n");
 640                 return -ENOMEM;
 641         }
 642
 643         req->skb = skb;
 644         req->devinfo = devinfo;
 645         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
 646                           skb->data, skb->len, brcmf_usb_tx_complete, req);
 647         req->urb->transfer_flags |= URB_ZERO_PACKET;
 648         brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
 649         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 650         if (ret) {
 651                 brcmf_dbg(ERROR, "brcmf_usb_tx usb_submit_urb FAILED\n");
 652                 brcmf_usb_del_fromq(devinfo, req);
 653                 brcmu_pkt_buf_free_skb(req->skb);
 654                 req->skb = NULL;
 655                 brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
 656                                                 &devinfo->tx_freecount);
 657         } else {
 658                 if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
 659                         !devinfo->tx_flowblock) {
 660                         brcmf_txflowblock(dev, true);
 661                         devinfo->tx_flowblock = true;
 662                 }
 663         }
 664
 665         return ret;
 666 }
 667
 668
 669 static int brcmf_usb_up(struct device *dev)
 670 {
 671         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 672         u16 ifnum;
 673
 674         if (devinfo->bus_pub.state == BCMFMAC_USB_STATE_UP)
 675                 return 0;
 676
 677         /* If the USB/HSIC bus in sleep state, wake it up */
 678         if (devinfo->suspend_state == USBOS_SUSPEND_STATE_SUSPENDED) {
 679                 if (brcmf_usb_pnp(devinfo, BCMFMAC_USB_PNP_RESUME) != 0) {
 680                         brcmf_dbg(ERROR, "Could not Resume the bus!\n");
 681                         return -EIO;
 682                 }
 683         }
 684         devinfo->activity = true;
 685
 686         /* Success, indicate devinfo is fully up */
 687         brcmf_usb_state_change(devinfo, BCMFMAC_USB_STATE_UP);
 688
 689         if (devinfo->intr_urb) {
 690                 int ret;
 691
 692                 usb_fill_int_urb(devinfo->intr_urb, devinfo->usbdev,
 693                         devinfo->intr_pipe,
 694                         &devinfo->intr,
 695                         devinfo->intr_size,
 696                         (usb_complete_t)brcmf_usb_intr_complete,
 697                         devinfo,
 698                         devinfo->interval);
 699
 700                 ret = usb_submit_urb(devinfo->intr_urb, GFP_ATOMIC);
 701                 if (ret) {
 702                         brcmf_dbg(ERROR, "USB_SUBMIT_URB failed with status %d\n",
 703                                   ret);
 704                         return -EINVAL;
 705                 }
 706         }
 707
 708         if (devinfo->ctl_urb) {
 709                 devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
 710                 devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
 711
 712                 ifnum = IFDESC(devinfo->usbdev, CONTROL_IF).bInterfaceNumber;
 713
 714                 /* CTL Write */
 715                 devinfo->ctl_write.bRequestType =
 716                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 717                 devinfo->ctl_write.bRequest = 0;
 718                 devinfo->ctl_write.wValue = cpu_to_le16(0);
 719                 devinfo->ctl_write.wIndex = cpu_to_le16p(&ifnum);
 720
 721                 /* CTL Read */
 722                 devinfo->ctl_read.bRequestType =
 723                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 724                 devinfo->ctl_read.bRequest = 1;
 725                 devinfo->ctl_read.wValue = cpu_to_le16(0);
 726                 devinfo->ctl_read.wIndex = cpu_to_le16p(&ifnum);
 727         }
 728         brcmf_usb_rx_fill_all(devinfo);
 729         return 0;
 730 }
 731
 732 static void brcmf_usb_down(struct device *dev)
 733 {
 734         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 735
 736         if (devinfo == NULL)
 737                 return;
 738
 739         brcmf_dbg(TRACE, "enter\n");
 740         if (devinfo->bus_pub.state == BCMFMAC_USB_STATE_DOWN)
 741                 return;
 742
 743         brcmf_usb_state_change(devinfo, BCMFMAC_USB_STATE_DOWN);
 744         if (devinfo->intr_urb)
 745                 usb_kill_urb(devinfo->intr_urb);
 746
 747         if (devinfo->ctl_urb)
 748                 usb_kill_urb(devinfo->ctl_urb);
 749
 750         if (devinfo->bulk_urb)
 751                 usb_kill_urb(devinfo->bulk_urb);
 752         brcmf_usb_free_q(&devinfo->tx_postq, true);
 753
 754         brcmf_usb_free_q(&devinfo->rx_postq, true);
 755 }
 756
 757 static int
 758 brcmf_usb_sync_wait(struct brcmf_usbdev_info *devinfo, u16 time)
 759 {
 760         int ret;
 761         int err = 0;
 762         int ms = time;
 763
 764         ret = wait_event_interruptible_timeout(devinfo->wait,
 765                 devinfo->waitdone == true, (ms * HZ / 1000));
 766
 767         if ((devinfo->waitdone == false) || (devinfo->sync_urb_status)) {
 768                 brcmf_dbg(ERROR, "timeout(%d) or urb err=%d\n",
 769                           ret, devinfo->sync_urb_status);
 770                 err = -EINVAL;
 771         }
 772         devinfo->waitdone = false;
 773         return err;
 774 }
 775
 776 static void
 777 brcmf_usb_sync_complete(struct urb *urb)
 778 {
 779         struct brcmf_usbdev_info *devinfo =
 780                         (struct brcmf_usbdev_info *)urb->context;
 781
 782         devinfo->waitdone = true;
 783         wake_up_interruptible(&devinfo->wait);
 784         devinfo->sync_urb_status = urb->status;
 785 }
 786
 787 static bool brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
 788                              void *buffer, int buflen)
 789 {
 790         int ret = 0;
 791         char *tmpbuf;
 792         u16 size;
 793
 794         if ((!devinfo) || (devinfo->ctl_urb == NULL))
 795                 return false;
 796
 797         tmpbuf = kmalloc(buflen, GFP_ATOMIC);
 798         if (!tmpbuf)
 799                 return false;
 800
 801         size = buflen;
 802         devinfo->ctl_urb->transfer_buffer_length = size;
 803
 804         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 805         devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
 806                 USB_RECIP_INTERFACE;
 807         devinfo->ctl_read.bRequest = cmd;
 808
 809         usb_fill_control_urb(devinfo->ctl_urb,
 810                 devinfo->usbdev,
 811                 usb_rcvctrlpipe(devinfo->usbdev, 0),
 812                 (unsigned char *) &devinfo->ctl_read,
 813                 (void *) tmpbuf, size,
 814                 (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 815
 816         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 817         if (ret < 0) {
 818                 brcmf_dbg(ERROR, "usb_submit_urb failed %d\n", ret);
 819                 kfree(tmpbuf);
 820                 return false;
 821         }
 822
 823         ret = brcmf_usb_sync_wait(devinfo, BRCMF_USB_SYNC_TIMEOUT);
 824         memcpy(buffer, tmpbuf, buflen);
 825         kfree(tmpbuf);
 826
 827         return (ret == 0);
 828 }
 829
 830 static bool
 831 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
 832 {
 833         struct bootrom_id_le id;
 834         u32 chipid, chiprev;
 835
 836         brcmf_dbg(TRACE, "enter\n");
 837
 838         if (devinfo == NULL)
 839                 return false;
 840
 841         /* Check if firmware downloaded already by querying runtime ID */
 842         id.chip = cpu_to_le32(0xDEAD);
 843         brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id,
 844                 sizeof(struct bootrom_id_le));
 845
 846         chipid = le32_to_cpu(id.chip);
 847         chiprev = le32_to_cpu(id.chiprev);
 848
 849         if ((chipid & 0x4300) == 0x4300)
 850                 brcmf_dbg(INFO, "chip %x rev 0x%x\n", chipid, chiprev);
 851         else
 852                 brcmf_dbg(INFO, "chip %d rev 0x%x\n", chipid, chiprev);
 853         if (chipid == BRCMF_POSTBOOT_ID) {
 854                 brcmf_dbg(INFO, "firmware already downloaded\n");
 855                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id,
 856                         sizeof(struct bootrom_id_le));
 857                 return false;
 858         } else {
 859                 devinfo->bus_pub.devid = chipid;
 860                 devinfo->bus_pub.chiprev = chiprev;
 861         }
 862         return true;
 863 }
 864
 865 static int
 866 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
 867 {
 868         struct bootrom_id_le id;
 869         u16 wait = 0, wait_time;
 870
 871         brcmf_dbg(TRACE, "enter\n");
 872
 873         if (devinfo == NULL)
 874                 return -EINVAL;
 875
 876         /* Give dongle chance to boot */
 877         wait_time = BRCMF_USB_DLIMAGE_SPINWAIT;
 878         while (wait < BRCMF_USB_DLIMAGE_LIMIT) {
 879                 mdelay(wait_time);
 880                 wait += wait_time;
 881                 id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
 882                 brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id,
 883                         sizeof(struct bootrom_id_le));
 884                 if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
 885                         break;
 886         }
 887
 888         if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
 889                 brcmf_dbg(INFO, "download done %d ms postboot chip 0x%x/rev 0x%x\n",
 890                           wait, le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
 891
 892                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id,
 893                         sizeof(struct bootrom_id_le));
 894
 895                 /* XXX this wait may not be necessary */
 896                 mdelay(BRCMF_USB_RESETCFG_SPINWAIT);
 897                 return 0;
 898         } else {
 899                 brcmf_dbg(ERROR, "Cannot talk to Dongle. Firmware is not UP, %d ms\n",
 900                           wait);
 901                 return -EINVAL;
 902         }
 903 }
 904
 905
 906 static int
 907 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
 908 {
 909         int ret;
 910
 911         if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
 912                 return -EINVAL;
 913
 914         /* Prepare the URB */
 915         usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
 916                           devinfo->tx_pipe, buffer, len,
 917                           (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 918
 919         devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
 920
 921         ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
 922         if (ret) {
 923                 brcmf_dbg(ERROR, "usb_submit_urb failed %d\n", ret);
 924                 return ret;
 925         }
 926         ret = brcmf_usb_sync_wait(devinfo, BRCMF_USB_SYNC_TIMEOUT);
 927         return ret;
 928 }
 929
 930 static int
 931 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
 932 {
 933         unsigned int sendlen, sent, dllen;
 934         char *bulkchunk = NULL, *dlpos;
 935         struct rdl_state_le state;
 936         u32 rdlstate, rdlbytes;
 937         int err = 0;
 938         brcmf_dbg(TRACE, "fw %p, len %d\n", fw, fwlen);
 939
 940         bulkchunk = kmalloc(RDL_CHUNK, GFP_ATOMIC);
 941         if (bulkchunk == NULL) {
 942                 err = -ENOMEM;
 943                 goto fail;
 944         }
 945
 946         /* 1) Prepare USB boot loader for runtime image */
 947         brcmf_usb_dl_cmd(devinfo, DL_START, &state,
 948                          sizeof(struct rdl_state_le));
 949
 950         rdlstate = le32_to_cpu(state.state);
 951         rdlbytes = le32_to_cpu(state.bytes);
 952
 953         /* 2) Check we are in the Waiting state */
 954         if (rdlstate != DL_WAITING) {
 955                 brcmf_dbg(ERROR, "Failed to DL_START\n");
 956                 err = -EINVAL;
 957                 goto fail;
 958         }
 959         sent = 0;
 960         dlpos = fw;
 961         dllen = fwlen;
 962
 963         /* Get chip id and rev */
 964         while (rdlbytes != dllen) {
 965                 /* Wait until the usb device reports it received all
 966                  * the bytes we sent */
 967                 if ((rdlbytes == sent) && (rdlbytes != dllen)) {
 968                         if ((dllen-sent) < RDL_CHUNK)
 969                                 sendlen = dllen-sent;
 970                         else
 971                                 sendlen = RDL_CHUNK;
 972
 973                         /* simply avoid having to send a ZLP by ensuring we
 974                          * never have an even
 975                          * multiple of 64
 976                          */
 977                         if (!(sendlen % 64))
 978                                 sendlen -= 4;
 979
 980                         /* send data */
 981                         memcpy(bulkchunk, dlpos, sendlen);
 982                         if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
 983                                                    sendlen)) {
 984                                 brcmf_dbg(ERROR, "send_bulk failed\n");
 985                                 err = -EINVAL;
 986                                 goto fail;
 987                         }
 988
 989                         dlpos += sendlen;
 990                         sent += sendlen;
 991                 }
 992                 if (!brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
 993                                       sizeof(struct rdl_state_le))) {
 994                         brcmf_dbg(ERROR, "DL_GETSTATE Failed xxxx\n");
 995                         err = -EINVAL;
 996                         goto fail;
 997                 }
 998
 999                 rdlstate = le32_to_cpu(state.state);
1000                 rdlbytes = le32_to_cpu(state.bytes);
1001
1002                 /* restart if an error is reported */
1003                 if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
1004                         brcmf_dbg(ERROR, "Bad Hdr or Bad CRC state %d\n",
1005                                   rdlstate);
1006                         err = -EINVAL;
1007                         goto fail;
1008                 }
1009         }
1010
1011 fail:
1012         kfree(bulkchunk);
1013         brcmf_dbg(TRACE, "err=%d\n", err);
1014         return err;
1015 }
1016
1017 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
1018 {
1019         int err;
1020
1021         brcmf_dbg(TRACE, "enter\n");
1022
1023         if (devinfo == NULL)
1024                 return -EINVAL;
1025
1026         if (devinfo->bus_pub.devid == 0xDEAD)
1027                 return -EINVAL;
1028
1029         err = brcmf_usb_dl_writeimage(devinfo, fw, len);
1030         if (err == 0)
1031                 devinfo->bus_pub.state = BCMFMAC_USB_STATE_DL_DONE;
1032         else
1033                 devinfo->bus_pub.state = BCMFMAC_USB_STATE_DL_PENDING;
1034         brcmf_dbg(TRACE, "exit: err=%d\n", err);
1035
1036         return err;
1037 }
1038
1039 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
1040 {
1041         struct rdl_state_le state;
1042
1043         brcmf_dbg(TRACE, "enter\n");
1044         if (!devinfo)
1045                 return -EINVAL;
1046
1047         if (devinfo->bus_pub.devid == 0xDEAD)
1048                 return -EINVAL;
1049
1050         /* Check we are runnable */
1051         brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
1052                 sizeof(struct rdl_state_le));
1053
1054         /* Start the image */
1055         if (state.state == cpu_to_le32(DL_RUNNABLE)) {
1056                 if (!brcmf_usb_dl_cmd(devinfo, DL_GO, &state,
1057                         sizeof(struct rdl_state_le)))
1058                         return -ENODEV;
1059                 if (brcmf_usb_resetcfg(devinfo))
1060                         return -ENODEV;
1061                 /* The Dongle may go for re-enumeration. */
1062         } else {
1063                 brcmf_dbg(ERROR, "Dongle not runnable\n");
1064                 return -EINVAL;
1065         }
1066         brcmf_dbg(TRACE, "exit\n");
1067         return 0;
1068 }
1069
1070 static bool brcmf_usb_chip_support(int chipid, int chiprev)
1071 {
1072         switch(chipid) {
1073         case 43143:
1074                 return true;
1075         case 43235:
1076         case 43236:
1077         case 43238:
1078                 return (chiprev == 3);
1079         case 43242:
1080                 return true;
1081         default:
1082                 break;
1083         }
1084         return false;
1085 }
1086
1087 static int
1088 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1089 {
1090         int devid, chiprev;
1091         int err;
1092
1093         brcmf_dbg(TRACE, "enter\n");
1094         if (devinfo == NULL)
1095                 return -ENODEV;
1096
1097         devid = devinfo->bus_pub.devid;
1098         chiprev = devinfo->bus_pub.chiprev;
1099
1100         if (!brcmf_usb_chip_support(devid, chiprev)) {
1101                 brcmf_dbg(ERROR, "unsupported chip %d rev %d\n",
1102                           devid, chiprev);
1103                 return -EINVAL;
1104         }
1105
1106         if (!devinfo->image) {
1107                 brcmf_dbg(ERROR, "No firmware!\n");
1108                 return -ENOENT;
1109         }
1110
1111         err = brcmf_usb_dlstart(devinfo,
1112                 devinfo->image, devinfo->image_len);
1113         if (err == 0)
1114                 err = brcmf_usb_dlrun(devinfo);
1115         return err;
1116 }
1117
1118
1119 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1120 {
1121         brcmf_dbg(TRACE, "devinfo %p\n", devinfo);
1122
1123         /* free the URBS */
1124         brcmf_usb_free_q(&devinfo->rx_freeq, false);
1125         brcmf_usb_free_q(&devinfo->tx_freeq, false);
1126
1127         usb_free_urb(devinfo->intr_urb);
1128         usb_free_urb(devinfo->ctl_urb);
1129         usb_free_urb(devinfo->bulk_urb);
1130
1131         kfree(devinfo->tx_reqs);
1132         kfree(devinfo->rx_reqs);
1133 }
1134
1135 #define TRX_MAGIC       0x30524448      /* "HDR0" */
1136 #define TRX_VERSION     1               /* Version 1 */
1137 #define TRX_MAX_LEN     0x3B0000        /* Max length */
1138 #define TRX_NO_HEADER   1               /* Do not write TRX header */
1139 #define TRX_MAX_OFFSET  3               /* Max number of individual files */
1140 #define TRX_UNCOMP_IMAGE        0x20    /* Trx contains uncompressed image */
1141
1142 struct trx_header_le {
1143         __le32 magic;           /* "HDR0" */
1144         __le32 len;             /* Length of file including header */
1145         __le32 crc32;           /* CRC from flag_version to end of file */
1146         __le32 flag_version;    /* 0:15 flags, 16:31 version */
1147         __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of
1148                                          * header */
1149 };
1150
1151 static int check_file(const u8 *headers)
1152 {
1153         struct trx_header_le *trx;
1154         int actual_len = -1;
1155
1156         /* Extract trx header */
1157         trx = (struct trx_header_le *) headers;
1158         if (trx->magic != cpu_to_le32(TRX_MAGIC))
1159                 return -1;
1160
1161         headers += sizeof(struct trx_header_le);
1162
1163         if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1164                 actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1165                 return actual_len + sizeof(struct trx_header_le);
1166         }
1167         return -1;
1168 }
1169
1170 static int brcmf_usb_get_fw(struct brcmf_usbdev_info *devinfo)
1171 {
1172         s8 *fwname;
1173         const struct firmware *fw;
1174         struct brcmf_usb_image *fw_image;
1175         int err;
1176
1177         switch (devinfo->bus_pub.devid) {
1178         case 43143:
1179                 fwname = BRCMF_USB_43143_FW_NAME;
1180                 break;
1181         case 43235:
1182         case 43236:
1183         case 43238:
1184                 fwname = BRCMF_USB_43236_FW_NAME;
1185                 break;
1186         case 43242:
1187                 fwname = BRCMF_USB_43242_FW_NAME;
1188                 break;
1189         default:
1190                 return -EINVAL;
1191                 break;
1192         }
1193
1194         list_for_each_entry(fw_image, &fw_image_list, list) {
1195                 if (fw_image->fwname == fwname) {
1196                         devinfo->image = fw_image->image;
1197                         devinfo->image_len = fw_image->image_len;
1198                         return 0;
1199                 }
1200         }
1201         /* fw image not yet loaded. Load it now and add to list */
1202         err = request_firmware(&fw, fwname, devinfo->dev);
1203         if (!fw) {
1204                 brcmf_dbg(ERROR, "fail to request firmware %s\n", fwname);
1205                 return err;
1206         }
1207         if (check_file(fw->data) < 0) {
1208                 brcmf_dbg(ERROR, "invalid firmware %s\n", fwname);
1209                 return -EINVAL;
1210         }
1211
1212         fw_image = kzalloc(sizeof(*fw_image), GFP_ATOMIC);
1213         if (!fw_image)
1214                 return -ENOMEM;
1215         INIT_LIST_HEAD(&fw_image->list);
1216         list_add_tail(&fw_image->list, &fw_image_list);
1217         fw_image->fwname = fwname;
1218         fw_image->image = vmalloc(fw->size);
1219         if (!fw_image->image)
1220                 return -ENOMEM;
1221
1222         memcpy(fw_image->image, fw->data, fw->size);
1223         fw_image->image_len = fw->size;
1224
1225         release_firmware(fw);
1226
1227         devinfo->image = fw_image->image;
1228         devinfo->image_len = fw_image->image_len;
1229
1230         return 0;
1231 }
1232
1233
1234 static
1235 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1236                                       int nrxq, int ntxq)
1237 {
1238         devinfo->bus_pub.nrxq = nrxq;
1239         devinfo->rx_low_watermark = nrxq / 2;
1240         devinfo->bus_pub.devinfo = devinfo;
1241         devinfo->bus_pub.ntxq = ntxq;
1242
1243         /* flow control when too many tx urbs posted */
1244         devinfo->tx_low_watermark = ntxq / 4;
1245         devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1246         devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1247
1248         /* Initialize other structure content */
1249         init_waitqueue_head(&devinfo->ioctl_resp_wait);
1250
1251         /* Initialize the spinlocks */
1252         spin_lock_init(&devinfo->qlock);
1253
1254         INIT_LIST_HEAD(&devinfo->rx_freeq);
1255         INIT_LIST_HEAD(&devinfo->rx_postq);
1256
1257         INIT_LIST_HEAD(&devinfo->tx_freeq);
1258         INIT_LIST_HEAD(&devinfo->tx_postq);
1259
1260         devinfo->tx_flowblock = false;
1261
1262         devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1263         if (!devinfo->rx_reqs)
1264                 goto error;
1265
1266         devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1267         if (!devinfo->tx_reqs)
1268                 goto error;
1269         devinfo->tx_freecount = ntxq;
1270
1271         devinfo->intr_urb = usb_alloc_urb(0, GFP_ATOMIC);
1272         if (!devinfo->intr_urb) {
1273                 brcmf_dbg(ERROR, "usb_alloc_urb (intr) failed\n");
1274                 goto error;
1275         }
1276         devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1277         if (!devinfo->ctl_urb) {
1278                 brcmf_dbg(ERROR, "usb_alloc_urb (ctl) failed\n");
1279                 goto error;
1280         }
1281         devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1282         if (!devinfo->bulk_urb) {
1283                 brcmf_dbg(ERROR, "usb_alloc_urb (bulk) failed\n");
1284                 goto error;
1285         }
1286
1287         init_waitqueue_head(&devinfo->wait);
1288         if (!brcmf_usb_dlneeded(devinfo))
1289                 return &devinfo->bus_pub;
1290
1291         brcmf_dbg(TRACE, "start fw downloading\n");
1292         if (brcmf_usb_get_fw(devinfo))
1293                 goto error;
1294
1295         if (brcmf_usb_fw_download(devinfo))
1296                 goto error;
1297
1298         return &devinfo->bus_pub;
1299
1300 error:
1301         brcmf_dbg(ERROR, "failed!\n");
1302         brcmf_usb_detach(devinfo);
1303         return NULL;
1304 }
1305
1306 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo,
1307                               const char *desc, u32 bustype, u32 hdrlen)
1308 {
1309         struct brcmf_bus *bus = NULL;
1310         struct brcmf_usbdev *bus_pub = NULL;
1311         int ret;
1312         struct device *dev = devinfo->dev;
1313
1314         bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1315         if (!bus_pub)
1316                 return -ENODEV;
1317
1318         bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC);
1319         if (!bus) {
1320                 ret = -ENOMEM;
1321                 goto fail;
1322         }
1323
1324         bus_pub->bus = bus;
1325         bus->brcmf_bus_txdata = brcmf_usb_tx;
1326         bus->brcmf_bus_init = brcmf_usb_up;
1327         bus->brcmf_bus_stop = brcmf_usb_down;
1328         bus->brcmf_bus_txctl = brcmf_usb_tx_ctlpkt;
1329         bus->brcmf_bus_rxctl = brcmf_usb_rx_ctlpkt;
1330         bus->type = bustype;
1331         bus->bus_priv.usb = bus_pub;
1332         dev_set_drvdata(dev, bus);
1333
1334         /* Attach to the common driver interface */
1335         ret = brcmf_attach(hdrlen, dev);
1336         if (ret) {
1337                 brcmf_dbg(ERROR, "dhd_attach failed\n");
1338                 goto fail;
1339         }
1340
1341         ret = brcmf_bus_start(dev);
1342         if (ret) {
1343                 brcmf_dbg(ERROR, "dongle is not responding\n");
1344                 brcmf_detach(dev);
1345                 goto fail;
1346         }
1347
1348         return 0;
1349 fail:
1350         /* Release resources in reverse order */
1351         kfree(bus);
1352         brcmf_usb_detach(devinfo);
1353         return ret;
1354 }
1355
1356 static void
1357 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1358 {
1359         if (!devinfo)
1360                 return;
1361         brcmf_dbg(TRACE, "enter: bus_pub %p\n", devinfo);
1362
1363         brcmf_detach(devinfo->dev);
1364         kfree(devinfo->bus_pub.bus);
1365         brcmf_usb_detach(devinfo);
1366 }
1367
1368 static int
1369 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1370 {
1371         int ep;
1372         struct usb_endpoint_descriptor *endpoint;
1373         int ret = 0;
1374         struct usb_device *usb = interface_to_usbdev(intf);
1375         int num_of_eps;
1376         u8 endpoint_num;
1377         struct brcmf_usbdev_info *devinfo;
1378
1379         brcmf_dbg(TRACE, "enter\n");
1380
1381         devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1382         if (devinfo == NULL)
1383                 return -ENOMEM;
1384
1385         devinfo->usbdev = usb;
1386         devinfo->dev = &usb->dev;
1387
1388         usb_set_intfdata(intf, devinfo);
1389
1390         /* Check that the device supports only one configuration */
1391         if (usb->descriptor.bNumConfigurations != 1) {
1392                 ret = -1;
1393                 goto fail;
1394         }
1395
1396         if (usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) {
1397                 ret = -1;
1398                 goto fail;
1399         }
1400
1401         /*
1402          * Only the BDC interface configuration is supported:
1403          *      Device class: USB_CLASS_VENDOR_SPEC
1404          *      if0 class: USB_CLASS_VENDOR_SPEC
1405          *      if0/ep0: control
1406          *      if0/ep1: bulk in
1407          *      if0/ep2: bulk out (ok if swapped with bulk in)
1408          */
1409         if (CONFIGDESC(usb)->bNumInterfaces != 1) {
1410                 ret = -1;
1411                 goto fail;
1412         }
1413
1414         /* Check interface */
1415         if (IFDESC(usb, CONTROL_IF).bInterfaceClass != USB_CLASS_VENDOR_SPEC ||
1416             IFDESC(usb, CONTROL_IF).bInterfaceSubClass != 2 ||
1417             IFDESC(usb, CONTROL_IF).bInterfaceProtocol != 0xff) {
1418                 brcmf_dbg(ERROR, "invalid control interface: class %d, subclass %d, proto %d\n",
1419                           IFDESC(usb, CONTROL_IF).bInterfaceClass,
1420                           IFDESC(usb, CONTROL_IF).bInterfaceSubClass,
1421                           IFDESC(usb, CONTROL_IF).bInterfaceProtocol);
1422                 ret = -1;
1423                 goto fail;
1424         }
1425
1426         /* Check control endpoint */
1427         endpoint = &IFEPDESC(usb, CONTROL_IF, 0);
1428         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
1429                 != USB_ENDPOINT_XFER_INT) {
1430                 brcmf_dbg(ERROR, "invalid control endpoint %d\n",
1431                           endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK);
1432                 ret = -1;
1433                 goto fail;
1434         }
1435
1436         endpoint_num = endpoint->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
1437         devinfo->intr_pipe = usb_rcvintpipe(usb, endpoint_num);
1438
1439         devinfo->rx_pipe = 0;
1440         devinfo->rx_pipe2 = 0;
1441         devinfo->tx_pipe = 0;
1442         num_of_eps = IFDESC(usb, BULK_IF).bNumEndpoints - 1;
1443
1444         /* Check data endpoints and get pipes */
1445         for (ep = 1; ep <= num_of_eps; ep++) {
1446                 endpoint = &IFEPDESC(usb, BULK_IF, ep);
1447                 if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) !=
1448                     USB_ENDPOINT_XFER_BULK) {
1449                         brcmf_dbg(ERROR, "invalid data endpoint %d\n", ep);
1450                         ret = -1;
1451                         goto fail;
1452                 }
1453
1454                 endpoint_num = endpoint->bEndpointAddress &
1455                                USB_ENDPOINT_NUMBER_MASK;
1456                 if ((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
1457                         == USB_DIR_IN) {
1458                         if (!devinfo->rx_pipe) {
1459                                 devinfo->rx_pipe =
1460                                         usb_rcvbulkpipe(usb, endpoint_num);
1461                         } else {
1462                                 devinfo->rx_pipe2 =
1463                                         usb_rcvbulkpipe(usb, endpoint_num);
1464                         }
1465                 } else {
1466                         devinfo->tx_pipe = usb_sndbulkpipe(usb, endpoint_num);
1467                 }
1468         }
1469
1470         /* Allocate interrupt URB and data buffer */
1471         /* RNDIS says 8-byte intr, our old drivers used 4-byte */
1472         if (IFEPDESC(usb, CONTROL_IF, 0).wMaxPacketSize == cpu_to_le16(16))
1473                 devinfo->intr_size = 8;
1474         else
1475                 devinfo->intr_size = 4;
1476
1477         devinfo->interval = IFEPDESC(usb, CONTROL_IF, 0).bInterval;
1478
1479         if (usb->speed == USB_SPEED_HIGH)
1480                 brcmf_dbg(INFO, "Broadcom high speed USB wireless device detected\n");
1481         else
1482                 brcmf_dbg(INFO, "Broadcom full speed USB wireless device detected\n");
1483
1484         ret = brcmf_usb_probe_cb(devinfo, "", USB_BUS, 0);
1485         if (ret)
1486                 goto fail;
1487
1488         /* Success */
1489         return 0;
1490
1491 fail:
1492         brcmf_dbg(ERROR, "failed with errno %d\n", ret);
1493         kfree(devinfo);
1494         usb_set_intfdata(intf, NULL);
1495         return ret;
1496
1497 }
1498
1499 static void
1500 brcmf_usb_disconnect(struct usb_interface *intf)
1501 {
1502         struct brcmf_usbdev_info *devinfo;
1503
1504         brcmf_dbg(TRACE, "enter\n");
1505         devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1506         brcmf_usb_disconnect_cb(devinfo);
1507         kfree(devinfo);
1508 }
1509
1510 /*
1511  *      only need to signal the bus being down and update the suspend state.
1512  */
1513 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1514 {
1515         struct usb_device *usb = interface_to_usbdev(intf);
1516         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1517
1518         brcmf_dbg(TRACE, "enter\n");
1519         devinfo->bus_pub.state = BCMFMAC_USB_STATE_DOWN;
1520         devinfo->suspend_state = USBOS_SUSPEND_STATE_SUSPENDED;
1521         return 0;
1522 }
1523
1524 /*
1525  *      mark suspend state active and crank up the bus.
1526  */
1527 static int brcmf_usb_resume(struct usb_interface *intf)
1528 {
1529         struct usb_device *usb = interface_to_usbdev(intf);
1530         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1531
1532         brcmf_dbg(TRACE, "enter\n");
1533         devinfo->suspend_state = USBOS_SUSPEND_STATE_DEVICE_ACTIVE;
1534         brcmf_bus_start(&usb->dev);
1535         return 0;
1536 }
1537
1538 #define BRCMF_USB_VENDOR_ID_BROADCOM    0x0a5c
1539 #define BRCMF_USB_DEVICE_ID_43143       0xbd1e
1540 #define BRCMF_USB_DEVICE_ID_43236       0xbd17
1541 #define BRCMF_USB_DEVICE_ID_43242       0xbd1f
1542 #define BRCMF_USB_DEVICE_ID_BCMFW       0x0bdc
1543
1544 static struct usb_device_id brcmf_usb_devid_table[] = {
1545         { USB_DEVICE(BRCMF_USB_VENDOR_ID_BROADCOM, BRCMF_USB_DEVICE_ID_43143) },
1546         { USB_DEVICE(BRCMF_USB_VENDOR_ID_BROADCOM, BRCMF_USB_DEVICE_ID_43236) },
1547         { USB_DEVICE(BRCMF_USB_VENDOR_ID_BROADCOM, BRCMF_USB_DEVICE_ID_43242) },
1548         /* special entry for device with firmware loaded and running */
1549         { USB_DEVICE(BRCMF_USB_VENDOR_ID_BROADCOM, BRCMF_USB_DEVICE_ID_BCMFW) },
1550         { }
1551 };
1552 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1553 MODULE_FIRMWARE(BRCMF_USB_43143_FW_NAME);
1554 MODULE_FIRMWARE(BRCMF_USB_43236_FW_NAME);
1555 MODULE_FIRMWARE(BRCMF_USB_43242_FW_NAME);
1556
1557 /* TODO: suspend and resume entries */
1558 static struct usb_driver brcmf_usbdrvr = {
1559         .name = KBUILD_MODNAME,
1560         .probe = brcmf_usb_probe,
1561         .disconnect = brcmf_usb_disconnect,
1562         .id_table = brcmf_usb_devid_table,
1563         .suspend = brcmf_usb_suspend,
1564         .resume = brcmf_usb_resume,
1565         .supports_autosuspend = 1,
1566         .disable_hub_initiated_lpm = 1,
1567 };
1568
1569 static void brcmf_release_fw(struct list_head *q)
1570 {
1571         struct brcmf_usb_image *fw_image, *next;
1572
1573         list_for_each_entry_safe(fw_image, next, q, list) {
1574                 vfree(fw_image->image);
1575                 list_del_init(&fw_image->list);
1576         }
1577 }
1578
1579
1580 void brcmf_usb_exit(void)
1581 {
1582         usb_deregister(&brcmf_usbdrvr);
1583         brcmf_release_fw(&fw_image_list);
1584 }
1585
1586 void brcmf_usb_init(void)
1587 {
1588         INIT_LIST_HEAD(&fw_image_list);
1589         usb_register(&brcmf_usbdrvr);
1590 }