drivers/net/wireless/broadcom/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/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/firmware.h>
  20 #include <linux/usb.h>
  21 #include <linux/vmalloc.h>
  22
  23 #include <brcmu_utils.h>
  24 #include <brcm_hw_ids.h>
  25 #include <brcmu_wifi.h>
  26 #include "bus.h"
  27 #include "debug.h"
  28 #include "firmware.h"
  29 #include "usb.h"
  30 #include "core.h"
  31 #include "common.h"
  32
  33
  34 #define IOCTL_RESP_TIMEOUT              msecs_to_jiffies(2000)
  35
  36 #define BRCMF_USB_RESET_GETVER_SPINWAIT 100     /* in unit of ms */
  37 #define BRCMF_USB_RESET_GETVER_LOOP_CNT 10
  38
  39 #define BRCMF_POSTBOOT_ID               0xA123  /* ID to detect if dongle
  40                                                    has boot up */
  41 #define BRCMF_USB_NRXQ                  50
  42 #define BRCMF_USB_NTXQ                  50
  43
  44 #define BRCMF_USB_CBCTL_WRITE           0
  45 #define BRCMF_USB_CBCTL_READ            1
  46 #define BRCMF_USB_MAX_PKT_SIZE          1600
  47
  48 BRCMF_FW_DEF(43143, "/*(DEBLOBBED)*/");
  49 BRCMF_FW_DEF(43236B, "/*(DEBLOBBED)*/");
  50 BRCMF_FW_DEF(43242A, "/*(DEBLOBBED)*/");
  51 BRCMF_FW_DEF(43569, "/*(DEBLOBBED)*/");
  52
  53 static struct brcmf_firmware_mapping brcmf_usb_fwnames[] = {
  54         BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
  55         BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B),
  56         BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B),
  57         BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B),
  58         BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A),
  59         BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569),
  60         BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569)
  61 };
  62
  63 #define TRX_MAGIC               0x30524448      /* "HDR0" */
  64 #define TRX_MAX_OFFSET          3               /* Max number of file offsets */
  65 #define TRX_UNCOMP_IMAGE        0x20            /* Trx holds uncompressed img */
  66 #define TRX_RDL_CHUNK           1500            /* size of each dl transfer */
  67 #define TRX_OFFSETS_DLFWLEN_IDX 0
  68
  69 /* Control messages: bRequest values */
  70 #define DL_GETSTATE     0       /* returns the rdl_state_t struct */
  71 #define DL_CHECK_CRC    1       /* currently unused */
  72 #define DL_GO           2       /* execute downloaded image */
  73 #define DL_START        3       /* initialize dl state */
  74 #define DL_REBOOT       4       /* reboot the device in 2 seconds */
  75 #define DL_GETVER       5       /* returns the bootrom_id_t struct */
  76 #define DL_GO_PROTECTED 6       /* execute the downloaded code and set reset
  77                                  * event to occur in 2 seconds.  It is the
  78                                  * responsibility of the downloaded code to
  79                                  * clear this event
  80                                  */
  81 #define DL_EXEC         7       /* jump to a supplied address */
  82 #define DL_RESETCFG     8       /* To support single enum on dongle
  83                                  * - Not used by bootloader
  84                                  */
  85 #define DL_DEFER_RESP_OK 9      /* Potentially defer the response to setup
  86                                  * if resp unavailable
  87                                  */
  88
  89 /* states */
  90 #define DL_WAITING      0       /* waiting to rx first pkt */
  91 #define DL_READY        1       /* hdr was good, waiting for more of the
  92                                  * compressed image
  93                                  */
  94 #define DL_BAD_HDR      2       /* hdr was corrupted */
  95 #define DL_BAD_CRC      3       /* compressed image was corrupted */
  96 #define DL_RUNNABLE     4       /* download was successful,waiting for go cmd */
  97 #define DL_START_FAIL   5       /* failed to initialize correctly */
  98 #define DL_NVRAM_TOOBIG 6       /* host specified nvram data exceeds DL_NVRAM
  99                                  * value
 100                                  */
 101 #define DL_IMAGE_TOOBIG 7       /* firmware image too big */
 102
 103
 104 struct trx_header_le {
 105         __le32 magic;           /* "HDR0" */
 106         __le32 len;             /* Length of file including header */
 107         __le32 crc32;           /* CRC from flag_version to end of file */
 108         __le32 flag_version;    /* 0:15 flags, 16:31 version */
 109         __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of
 110                                          * header
 111                                          */
 112 };
 113
 114 struct rdl_state_le {
 115         __le32 state;
 116         __le32 bytes;
 117 };
 118
 119 struct bootrom_id_le {
 120         __le32 chip;            /* Chip id */
 121         __le32 chiprev;         /* Chip rev */
 122         __le32 ramsize;         /* Size of  RAM */
 123         __le32 remapbase;       /* Current remap base address */
 124         __le32 boardtype;       /* Type of board */
 125         __le32 boardrev;        /* Board revision */
 126 };
 127
 128 struct brcmf_usb_image {
 129         struct list_head list;
 130         s8 *fwname;
 131         u8 *image;
 132         int image_len;
 133 };
 134
 135 struct brcmf_usbdev_info {
 136         struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
 137         spinlock_t qlock;
 138         struct list_head rx_freeq;
 139         struct list_head rx_postq;
 140         struct list_head tx_freeq;
 141         struct list_head tx_postq;
 142         uint rx_pipe, tx_pipe;
 143
 144         int rx_low_watermark;
 145         int tx_low_watermark;
 146         int tx_high_watermark;
 147         int tx_freecount;
 148         bool tx_flowblock;
 149         spinlock_t tx_flowblock_lock;
 150
 151         struct brcmf_usbreq *tx_reqs;
 152         struct brcmf_usbreq *rx_reqs;
 153
 154         char fw_name[BRCMF_FW_NAME_LEN];
 155         const u8 *image;        /* buffer for combine fw and nvram */
 156         int image_len;
 157
 158         struct usb_device *usbdev;
 159         struct device *dev;
 160         struct completion dev_init_done;
 161
 162         int ctl_in_pipe, ctl_out_pipe;
 163         struct urb *ctl_urb; /* URB for control endpoint */
 164         struct usb_ctrlrequest ctl_write;
 165         struct usb_ctrlrequest ctl_read;
 166         u32 ctl_urb_actual_length;
 167         int ctl_urb_status;
 168         int ctl_completed;
 169         wait_queue_head_t ioctl_resp_wait;
 170         ulong ctl_op;
 171         u8 ifnum;
 172
 173         struct urb *bulk_urb; /* used for FW download */
 174
 175         bool wowl_enabled;
 176         struct brcmf_mp_device *settings;
 177 };
 178
 179 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 180                                 struct brcmf_usbreq  *req);
 181
 182 static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
 183 {
 184         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 185         return bus_if->bus_priv.usb;
 186 }
 187
 188 static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
 189 {
 190         return brcmf_usb_get_buspub(dev)->devinfo;
 191 }
 192
 193 static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
 194 {
 195         return wait_event_timeout(devinfo->ioctl_resp_wait,
 196                                   devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
 197 }
 198
 199 static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
 200 {
 201         wake_up(&devinfo->ioctl_resp_wait);
 202 }
 203
 204 static void
 205 brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
 206 {
 207         brcmf_dbg(USB, "Enter, status=%d\n", status);
 208
 209         if (unlikely(devinfo == NULL))
 210                 return;
 211
 212         if (type == BRCMF_USB_CBCTL_READ) {
 213                 if (status == 0)
 214                         devinfo->bus_pub.stats.rx_ctlpkts++;
 215                 else
 216                         devinfo->bus_pub.stats.rx_ctlerrs++;
 217         } else if (type == BRCMF_USB_CBCTL_WRITE) {
 218                 if (status == 0)
 219                         devinfo->bus_pub.stats.tx_ctlpkts++;
 220                 else
 221                         devinfo->bus_pub.stats.tx_ctlerrs++;
 222         }
 223
 224         devinfo->ctl_urb_status = status;
 225         devinfo->ctl_completed = true;
 226         brcmf_usb_ioctl_resp_wake(devinfo);
 227 }
 228
 229 static void
 230 brcmf_usb_ctlread_complete(struct urb *urb)
 231 {
 232         struct brcmf_usbdev_info *devinfo =
 233                 (struct brcmf_usbdev_info *)urb->context;
 234
 235         brcmf_dbg(USB, "Enter\n");
 236         devinfo->ctl_urb_actual_length = urb->actual_length;
 237         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
 238                 urb->status);
 239 }
 240
 241 static void
 242 brcmf_usb_ctlwrite_complete(struct urb *urb)
 243 {
 244         struct brcmf_usbdev_info *devinfo =
 245                 (struct brcmf_usbdev_info *)urb->context;
 246
 247         brcmf_dbg(USB, "Enter\n");
 248         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
 249                 urb->status);
 250 }
 251
 252 static int
 253 brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 254 {
 255         int ret;
 256         u16 size;
 257
 258         brcmf_dbg(USB, "Enter\n");
 259         if (devinfo == NULL || buf == NULL ||
 260             len == 0 || devinfo->ctl_urb == NULL)
 261                 return -EINVAL;
 262
 263         size = len;
 264         devinfo->ctl_write.wLength = cpu_to_le16p(&size);
 265         devinfo->ctl_urb->transfer_buffer_length = size;
 266         devinfo->ctl_urb_status = 0;
 267         devinfo->ctl_urb_actual_length = 0;
 268
 269         usb_fill_control_urb(devinfo->ctl_urb,
 270                 devinfo->usbdev,
 271                 devinfo->ctl_out_pipe,
 272                 (unsigned char *) &devinfo->ctl_write,
 273                 buf, size,
 274                 (usb_complete_t)brcmf_usb_ctlwrite_complete,
 275                 devinfo);
 276
 277         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 278         if (ret < 0)
 279                 brcmf_err("usb_submit_urb failed %d\n", ret);
 280
 281         return ret;
 282 }
 283
 284 static int
 285 brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 286 {
 287         int ret;
 288         u16 size;
 289
 290         brcmf_dbg(USB, "Enter\n");
 291         if ((devinfo == NULL) || (buf == NULL) || (len == 0)
 292                 || (devinfo->ctl_urb == NULL))
 293                 return -EINVAL;
 294
 295         size = len;
 296         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 297         devinfo->ctl_urb->transfer_buffer_length = size;
 298
 299         devinfo->ctl_read.bRequestType = USB_DIR_IN
 300                 | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 301         devinfo->ctl_read.bRequest = 1;
 302
 303         usb_fill_control_urb(devinfo->ctl_urb,
 304                 devinfo->usbdev,
 305                 devinfo->ctl_in_pipe,
 306                 (unsigned char *) &devinfo->ctl_read,
 307                 buf, size,
 308                 (usb_complete_t)brcmf_usb_ctlread_complete,
 309                 devinfo);
 310
 311         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 312         if (ret < 0)
 313                 brcmf_err("usb_submit_urb failed %d\n", ret);
 314
 315         return ret;
 316 }
 317
 318 static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 319 {
 320         int err = 0;
 321         int timeout = 0;
 322         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 323
 324         brcmf_dbg(USB, "Enter\n");
 325         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
 326                 return -EIO;
 327
 328         if (test_and_set_bit(0, &devinfo->ctl_op))
 329                 return -EIO;
 330
 331         devinfo->ctl_completed = false;
 332         err = brcmf_usb_send_ctl(devinfo, buf, len);
 333         if (err) {
 334                 brcmf_err("fail %d bytes: %d\n", err, len);
 335                 clear_bit(0, &devinfo->ctl_op);
 336                 return err;
 337         }
 338         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 339         clear_bit(0, &devinfo->ctl_op);
 340         if (!timeout) {
 341                 brcmf_err("Txctl wait timed out\n");
 342                 err = -EIO;
 343         }
 344         return err;
 345 }
 346
 347 static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 348 {
 349         int err = 0;
 350         int timeout = 0;
 351         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 352
 353         brcmf_dbg(USB, "Enter\n");
 354         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP)
 355                 return -EIO;
 356
 357         if (test_and_set_bit(0, &devinfo->ctl_op))
 358                 return -EIO;
 359
 360         devinfo->ctl_completed = false;
 361         err = brcmf_usb_recv_ctl(devinfo, buf, len);
 362         if (err) {
 363                 brcmf_err("fail %d bytes: %d\n", err, len);
 364                 clear_bit(0, &devinfo->ctl_op);
 365                 return err;
 366         }
 367         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 368         err = devinfo->ctl_urb_status;
 369         clear_bit(0, &devinfo->ctl_op);
 370         if (!timeout) {
 371                 brcmf_err("rxctl wait timed out\n");
 372                 err = -EIO;
 373         }
 374         if (!err)
 375                 return devinfo->ctl_urb_actual_length;
 376         else
 377                 return err;
 378 }
 379
 380 static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
 381                                           struct list_head *q, int *counter)
 382 {
 383         unsigned long flags;
 384         struct brcmf_usbreq  *req;
 385         spin_lock_irqsave(&devinfo->qlock, flags);
 386         if (list_empty(q)) {
 387                 spin_unlock_irqrestore(&devinfo->qlock, flags);
 388                 return NULL;
 389         }
 390         req = list_entry(q->next, struct brcmf_usbreq, list);
 391         list_del_init(q->next);
 392         if (counter)
 393                 (*counter)--;
 394         spin_unlock_irqrestore(&devinfo->qlock, flags);
 395         return req;
 396
 397 }
 398
 399 static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
 400                           struct list_head *q, struct brcmf_usbreq *req,
 401                           int *counter)
 402 {
 403         unsigned long flags;
 404         spin_lock_irqsave(&devinfo->qlock, flags);
 405         list_add_tail(&req->list, q);
 406         if (counter)
 407                 (*counter)++;
 408         spin_unlock_irqrestore(&devinfo->qlock, flags);
 409 }
 410
 411 static struct brcmf_usbreq *
 412 brcmf_usbdev_qinit(struct list_head *q, int qsize)
 413 {
 414         int i;
 415         struct brcmf_usbreq *req, *reqs;
 416
 417         reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
 418         if (reqs == NULL)
 419                 return NULL;
 420
 421         req = reqs;
 422
 423         for (i = 0; i < qsize; i++) {
 424                 req->urb = usb_alloc_urb(0, GFP_ATOMIC);
 425                 if (!req->urb)
 426                         goto fail;
 427
 428                 INIT_LIST_HEAD(&req->list);
 429                 list_add_tail(&req->list, q);
 430                 req++;
 431         }
 432         return reqs;
 433 fail:
 434         brcmf_err("fail!\n");
 435         while (!list_empty(q)) {
 436                 req = list_entry(q->next, struct brcmf_usbreq, list);
 437                 if (req)
 438                         usb_free_urb(req->urb);
 439                 list_del(q->next);
 440         }
 441         kfree(reqs);
 442         return NULL;
 443
 444 }
 445
 446 static void brcmf_usb_free_q(struct list_head *q, bool pending)
 447 {
 448         struct brcmf_usbreq *req, *next;
 449         int i = 0;
 450         list_for_each_entry_safe(req, next, q, list) {
 451                 if (!req->urb) {
 452                         brcmf_err("bad req\n");
 453                         break;
 454                 }
 455                 i++;
 456                 if (pending) {
 457                         usb_kill_urb(req->urb);
 458                 } else {
 459                         usb_free_urb(req->urb);
 460                         list_del_init(&req->list);
 461                 }
 462         }
 463 }
 464
 465 static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
 466                                 struct brcmf_usbreq *req)
 467 {
 468         unsigned long flags;
 469
 470         spin_lock_irqsave(&devinfo->qlock, flags);
 471         list_del_init(&req->list);
 472         spin_unlock_irqrestore(&devinfo->qlock, flags);
 473 }
 474
 475
 476 static void brcmf_usb_tx_complete(struct urb *urb)
 477 {
 478         struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
 479         struct brcmf_usbdev_info *devinfo = req->devinfo;
 480         unsigned long flags;
 481
 482         brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
 483                   req->skb);
 484         brcmf_usb_del_fromq(devinfo, req);
 485
 486         brcmf_txcomplete(devinfo->dev, req->skb, urb->status == 0);
 487         req->skb = NULL;
 488         brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
 489         spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 490         if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
 491                 devinfo->tx_flowblock) {
 492                 brcmf_txflowblock(devinfo->dev, false);
 493                 devinfo->tx_flowblock = false;
 494         }
 495         spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 496 }
 497
 498 static void brcmf_usb_rx_complete(struct urb *urb)
 499 {
 500         struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
 501         struct brcmf_usbdev_info *devinfo = req->devinfo;
 502         struct sk_buff *skb;
 503
 504         brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
 505         brcmf_usb_del_fromq(devinfo, req);
 506         skb = req->skb;
 507         req->skb = NULL;
 508
 509         /* zero lenght packets indicate usb "failure". Do not refill */
 510         if (urb->status != 0 || !urb->actual_length) {
 511                 brcmu_pkt_buf_free_skb(skb);
 512                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 513                 return;
 514         }
 515
 516         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP) {
 517                 skb_put(skb, urb->actual_length);
 518                 brcmf_rx_frame(devinfo->dev, skb, true);
 519                 brcmf_usb_rx_refill(devinfo, req);
 520         } else {
 521                 brcmu_pkt_buf_free_skb(skb);
 522                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 523         }
 524         return;
 525
 526 }
 527
 528 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 529                                 struct brcmf_usbreq  *req)
 530 {
 531         struct sk_buff *skb;
 532         int ret;
 533
 534         if (!req || !devinfo)
 535                 return;
 536
 537         skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
 538         if (!skb) {
 539                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 540                 return;
 541         }
 542         req->skb = skb;
 543
 544         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
 545                           skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
 546                           req);
 547         req->devinfo = devinfo;
 548         brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
 549
 550         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 551         if (ret) {
 552                 brcmf_usb_del_fromq(devinfo, req);
 553                 brcmu_pkt_buf_free_skb(req->skb);
 554                 req->skb = NULL;
 555                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 556         }
 557         return;
 558 }
 559
 560 static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
 561 {
 562         struct brcmf_usbreq *req;
 563
 564         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 565                 brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
 566                 return;
 567         }
 568         while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
 569                 brcmf_usb_rx_refill(devinfo, req);
 570 }
 571
 572 static void
 573 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 574 {
 575         struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
 576         int old_state;
 577
 578         brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
 579                   devinfo->bus_pub.state, state);
 580
 581         if (devinfo->bus_pub.state == state)
 582                 return;
 583
 584         old_state = devinfo->bus_pub.state;
 585         devinfo->bus_pub.state = state;
 586
 587         /* update state of upper layer */
 588         if (state == BRCMFMAC_USB_STATE_DOWN) {
 589                 brcmf_dbg(USB, "DBUS is down\n");
 590                 brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
 591         } else if (state == BRCMFMAC_USB_STATE_UP) {
 592                 brcmf_dbg(USB, "DBUS is up\n");
 593                 brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
 594         } else {
 595                 brcmf_dbg(USB, "DBUS current state=%d\n", state);
 596         }
 597 }
 598
 599 static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
 600 {
 601         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 602         struct brcmf_usbreq  *req;
 603         int ret;
 604         unsigned long flags;
 605
 606         brcmf_dbg(USB, "Enter, skb=%p\n", skb);
 607         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 608                 ret = -EIO;
 609                 goto fail;
 610         }
 611
 612         req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
 613                                         &devinfo->tx_freecount);
 614         if (!req) {
 615                 brcmf_err("no req to send\n");
 616                 ret = -ENOMEM;
 617                 goto fail;
 618         }
 619
 620         req->skb = skb;
 621         req->devinfo = devinfo;
 622         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
 623                           skb->data, skb->len, brcmf_usb_tx_complete, req);
 624         req->urb->transfer_flags |= URB_ZERO_PACKET;
 625         brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
 626         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 627         if (ret) {
 628                 brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
 629                 brcmf_usb_del_fromq(devinfo, req);
 630                 req->skb = NULL;
 631                 brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
 632                               &devinfo->tx_freecount);
 633                 goto fail;
 634         }
 635
 636         spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 637         if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
 638             !devinfo->tx_flowblock) {
 639                 brcmf_txflowblock(dev, true);
 640                 devinfo->tx_flowblock = true;
 641         }
 642         spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 643         return 0;
 644
 645 fail:
 646         return ret;
 647 }
 648
 649
 650 static int brcmf_usb_up(struct device *dev)
 651 {
 652         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 653
 654         brcmf_dbg(USB, "Enter\n");
 655         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
 656                 return 0;
 657
 658         /* Success, indicate devinfo is fully up */
 659         brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
 660
 661         if (devinfo->ctl_urb) {
 662                 devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
 663                 devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
 664
 665                 /* CTL Write */
 666                 devinfo->ctl_write.bRequestType =
 667                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 668                 devinfo->ctl_write.bRequest = 0;
 669                 devinfo->ctl_write.wValue = cpu_to_le16(0);
 670                 devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
 671
 672                 /* CTL Read */
 673                 devinfo->ctl_read.bRequestType =
 674                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 675                 devinfo->ctl_read.bRequest = 1;
 676                 devinfo->ctl_read.wValue = cpu_to_le16(0);
 677                 devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
 678         }
 679         brcmf_usb_rx_fill_all(devinfo);
 680         return 0;
 681 }
 682
 683 static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
 684 {
 685         int i;
 686
 687         if (devinfo->ctl_urb)
 688                 usb_kill_urb(devinfo->ctl_urb);
 689         if (devinfo->bulk_urb)
 690                 usb_kill_urb(devinfo->bulk_urb);
 691         if (devinfo->tx_reqs)
 692                 for (i = 0; i < devinfo->bus_pub.ntxq; i++)
 693                         usb_kill_urb(devinfo->tx_reqs[i].urb);
 694         if (devinfo->rx_reqs)
 695                 for (i = 0; i < devinfo->bus_pub.nrxq; i++)
 696                         usb_kill_urb(devinfo->rx_reqs[i].urb);
 697 }
 698
 699 static void brcmf_usb_down(struct device *dev)
 700 {
 701         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 702
 703         brcmf_dbg(USB, "Enter\n");
 704         if (devinfo == NULL)
 705                 return;
 706
 707         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
 708                 return;
 709
 710         brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
 711
 712         brcmf_cancel_all_urbs(devinfo);
 713 }
 714
 715 static void
 716 brcmf_usb_sync_complete(struct urb *urb)
 717 {
 718         struct brcmf_usbdev_info *devinfo =
 719                         (struct brcmf_usbdev_info *)urb->context;
 720
 721         devinfo->ctl_completed = true;
 722         brcmf_usb_ioctl_resp_wake(devinfo);
 723 }
 724
 725 static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
 726                             void *buffer, int buflen)
 727 {
 728         int ret;
 729         char *tmpbuf;
 730         u16 size;
 731
 732         if ((!devinfo) || (devinfo->ctl_urb == NULL))
 733                 return -EINVAL;
 734
 735         tmpbuf = kmalloc(buflen, GFP_ATOMIC);
 736         if (!tmpbuf)
 737                 return -ENOMEM;
 738
 739         size = buflen;
 740         devinfo->ctl_urb->transfer_buffer_length = size;
 741
 742         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 743         devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
 744                 USB_RECIP_INTERFACE;
 745         devinfo->ctl_read.bRequest = cmd;
 746
 747         usb_fill_control_urb(devinfo->ctl_urb,
 748                 devinfo->usbdev,
 749                 usb_rcvctrlpipe(devinfo->usbdev, 0),
 750                 (unsigned char *) &devinfo->ctl_read,
 751                 (void *) tmpbuf, size,
 752                 (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 753
 754         devinfo->ctl_completed = false;
 755         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 756         if (ret < 0) {
 757                 brcmf_err("usb_submit_urb failed %d\n", ret);
 758                 goto finalize;
 759         }
 760
 761         if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
 762                 usb_kill_urb(devinfo->ctl_urb);
 763                 ret = -ETIMEDOUT;
 764         } else {
 765                 memcpy(buffer, tmpbuf, buflen);
 766         }
 767
 768 finalize:
 769         kfree(tmpbuf);
 770         return ret;
 771 }
 772
 773 static bool
 774 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
 775 {
 776         struct bootrom_id_le id;
 777         u32 chipid, chiprev;
 778
 779         brcmf_dbg(USB, "Enter\n");
 780
 781         if (devinfo == NULL)
 782                 return false;
 783
 784         /* Check if firmware downloaded already by querying runtime ID */
 785         id.chip = cpu_to_le32(0xDEAD);
 786         brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 787
 788         chipid = le32_to_cpu(id.chip);
 789         chiprev = le32_to_cpu(id.chiprev);
 790
 791         if ((chipid & 0x4300) == 0x4300)
 792                 brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
 793         else
 794                 brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
 795         if (chipid == BRCMF_POSTBOOT_ID) {
 796                 brcmf_dbg(USB, "firmware already downloaded\n");
 797                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 798                 return false;
 799         } else {
 800                 devinfo->bus_pub.devid = chipid;
 801                 devinfo->bus_pub.chiprev = chiprev;
 802         }
 803         return true;
 804 }
 805
 806 static int
 807 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
 808 {
 809         struct bootrom_id_le id;
 810         u32 loop_cnt;
 811         int err;
 812
 813         brcmf_dbg(USB, "Enter\n");
 814
 815         loop_cnt = 0;
 816         do {
 817                 mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
 818                 loop_cnt++;
 819                 id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
 820                 err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 821                 if ((err) && (err != -ETIMEDOUT))
 822                         return err;
 823                 if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
 824                         break;
 825         } while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
 826
 827         if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
 828                 brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
 829                           le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
 830
 831                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 832                 return 0;
 833         } else {
 834                 brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
 835                           BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
 836                 return -EINVAL;
 837         }
 838 }
 839
 840
 841 static int
 842 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
 843 {
 844         int ret;
 845
 846         if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
 847                 return -EINVAL;
 848
 849         /* Prepare the URB */
 850         usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
 851                           devinfo->tx_pipe, buffer, len,
 852                           (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 853
 854         devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
 855
 856         devinfo->ctl_completed = false;
 857         ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
 858         if (ret) {
 859                 brcmf_err("usb_submit_urb failed %d\n", ret);
 860                 return ret;
 861         }
 862         ret = brcmf_usb_ioctl_resp_wait(devinfo);
 863         return (ret == 0);
 864 }
 865
 866 static int
 867 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
 868 {
 869         unsigned int sendlen, sent, dllen;
 870         char *bulkchunk = NULL, *dlpos;
 871         struct rdl_state_le state;
 872         u32 rdlstate, rdlbytes;
 873         int err = 0;
 874
 875         brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
 876
 877         bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
 878         if (bulkchunk == NULL) {
 879                 err = -ENOMEM;
 880                 goto fail;
 881         }
 882
 883         /* 1) Prepare USB boot loader for runtime image */
 884         brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
 885
 886         rdlstate = le32_to_cpu(state.state);
 887         rdlbytes = le32_to_cpu(state.bytes);
 888
 889         /* 2) Check we are in the Waiting state */
 890         if (rdlstate != DL_WAITING) {
 891                 brcmf_err("Failed to DL_START\n");
 892                 err = -EINVAL;
 893                 goto fail;
 894         }
 895         sent = 0;
 896         dlpos = fw;
 897         dllen = fwlen;
 898
 899         /* Get chip id and rev */
 900         while (rdlbytes != dllen) {
 901                 /* Wait until the usb device reports it received all
 902                  * the bytes we sent */
 903                 if ((rdlbytes == sent) && (rdlbytes != dllen)) {
 904                         if ((dllen-sent) < TRX_RDL_CHUNK)
 905                                 sendlen = dllen-sent;
 906                         else
 907                                 sendlen = TRX_RDL_CHUNK;
 908
 909                         /* simply avoid having to send a ZLP by ensuring we
 910                          * never have an even
 911                          * multiple of 64
 912                          */
 913                         if (!(sendlen % 64))
 914                                 sendlen -= 4;
 915
 916                         /* send data */
 917                         memcpy(bulkchunk, dlpos, sendlen);
 918                         if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
 919                                                    sendlen)) {
 920                                 brcmf_err("send_bulk failed\n");
 921                                 err = -EINVAL;
 922                                 goto fail;
 923                         }
 924
 925                         dlpos += sendlen;
 926                         sent += sendlen;
 927                 }
 928                 err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
 929                                        sizeof(state));
 930                 if (err) {
 931                         brcmf_err("DL_GETSTATE Failed\n");
 932                         goto fail;
 933                 }
 934
 935                 rdlstate = le32_to_cpu(state.state);
 936                 rdlbytes = le32_to_cpu(state.bytes);
 937
 938                 /* restart if an error is reported */
 939                 if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
 940                         brcmf_err("Bad Hdr or Bad CRC state %d\n",
 941                                   rdlstate);
 942                         err = -EINVAL;
 943                         goto fail;
 944                 }
 945         }
 946
 947 fail:
 948         kfree(bulkchunk);
 949         brcmf_dbg(USB, "Exit, err=%d\n", err);
 950         return err;
 951 }
 952
 953 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
 954 {
 955         int err;
 956
 957         brcmf_dbg(USB, "Enter\n");
 958
 959         if (devinfo == NULL)
 960                 return -EINVAL;
 961
 962         if (devinfo->bus_pub.devid == 0xDEAD)
 963                 return -EINVAL;
 964
 965         err = brcmf_usb_dl_writeimage(devinfo, fw, len);
 966         if (err == 0)
 967                 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
 968         else
 969                 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
 970         brcmf_dbg(USB, "Exit, err=%d\n", err);
 971
 972         return err;
 973 }
 974
 975 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
 976 {
 977         struct rdl_state_le state;
 978
 979         brcmf_dbg(USB, "Enter\n");
 980         if (!devinfo)
 981                 return -EINVAL;
 982
 983         if (devinfo->bus_pub.devid == 0xDEAD)
 984                 return -EINVAL;
 985
 986         /* Check we are runnable */
 987         state.state = 0;
 988         brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
 989
 990         /* Start the image */
 991         if (state.state == cpu_to_le32(DL_RUNNABLE)) {
 992                 if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
 993                         return -ENODEV;
 994                 if (brcmf_usb_resetcfg(devinfo))
 995                         return -ENODEV;
 996                 /* The Dongle may go for re-enumeration. */
 997         } else {
 998                 brcmf_err("Dongle not runnable\n");
 999                 return -EINVAL;
1000         }
1001         brcmf_dbg(USB, "Exit\n");
1002         return 0;
1003 }
1004
1005 static int
1006 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1007 {
1008         int err;
1009
1010         brcmf_dbg(USB, "Enter\n");
1011         if (devinfo == NULL)
1012                 return -ENODEV;
1013
1014         if (!devinfo->image) {
1015                 brcmf_err("No firmware!\n");
1016                 return -ENOENT;
1017         }
1018
1019         err = brcmf_usb_dlstart(devinfo,
1020                 (u8 *)devinfo->image, devinfo->image_len);
1021         if (err == 0)
1022                 err = brcmf_usb_dlrun(devinfo);
1023         return err;
1024 }
1025
1026
1027 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1028 {
1029         brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1030
1031         /* free the URBS */
1032         brcmf_usb_free_q(&devinfo->rx_freeq, false);
1033         brcmf_usb_free_q(&devinfo->tx_freeq, false);
1034
1035         usb_free_urb(devinfo->ctl_urb);
1036         usb_free_urb(devinfo->bulk_urb);
1037
1038         kfree(devinfo->tx_reqs);
1039         kfree(devinfo->rx_reqs);
1040
1041         if (devinfo->settings)
1042                 brcmf_release_module_param(devinfo->settings);
1043 }
1044
1045
1046 static int check_file(const u8 *headers)
1047 {
1048         struct trx_header_le *trx;
1049         int actual_len = -1;
1050
1051         brcmf_dbg(USB, "Enter\n");
1052         /* Extract trx header */
1053         trx = (struct trx_header_le *) headers;
1054         if (trx->magic != cpu_to_le32(TRX_MAGIC))
1055                 return -1;
1056
1057         headers += sizeof(struct trx_header_le);
1058
1059         if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1060                 actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1061                 return actual_len + sizeof(struct trx_header_le);
1062         }
1063         return -1;
1064 }
1065
1066
1067 static
1068 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1069                                       int nrxq, int ntxq)
1070 {
1071         brcmf_dbg(USB, "Enter\n");
1072
1073         devinfo->bus_pub.nrxq = nrxq;
1074         devinfo->rx_low_watermark = nrxq / 2;
1075         devinfo->bus_pub.devinfo = devinfo;
1076         devinfo->bus_pub.ntxq = ntxq;
1077         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1078
1079         /* flow control when too many tx urbs posted */
1080         devinfo->tx_low_watermark = ntxq / 4;
1081         devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1082         devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1083
1084         /* Initialize other structure content */
1085         init_waitqueue_head(&devinfo->ioctl_resp_wait);
1086
1087         /* Initialize the spinlocks */
1088         spin_lock_init(&devinfo->qlock);
1089         spin_lock_init(&devinfo->tx_flowblock_lock);
1090
1091         INIT_LIST_HEAD(&devinfo->rx_freeq);
1092         INIT_LIST_HEAD(&devinfo->rx_postq);
1093
1094         INIT_LIST_HEAD(&devinfo->tx_freeq);
1095         INIT_LIST_HEAD(&devinfo->tx_postq);
1096
1097         devinfo->tx_flowblock = false;
1098
1099         devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1100         if (!devinfo->rx_reqs)
1101                 goto error;
1102
1103         devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1104         if (!devinfo->tx_reqs)
1105                 goto error;
1106         devinfo->tx_freecount = ntxq;
1107
1108         devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1109         if (!devinfo->ctl_urb)
1110                 goto error;
1111         devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1112         if (!devinfo->bulk_urb)
1113                 goto error;
1114
1115         return &devinfo->bus_pub;
1116
1117 error:
1118         brcmf_err("failed!\n");
1119         brcmf_usb_detach(devinfo);
1120         return NULL;
1121 }
1122
1123 static void brcmf_usb_wowl_config(struct device *dev, bool enabled)
1124 {
1125         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
1126
1127         brcmf_dbg(USB, "Configuring WOWL, enabled=%d\n", enabled);
1128         devinfo->wowl_enabled = enabled;
1129         if (enabled)
1130                 device_set_wakeup_enable(devinfo->dev, true);
1131         else
1132                 device_set_wakeup_enable(devinfo->dev, false);
1133 }
1134
1135 static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1136         .txdata = brcmf_usb_tx,
1137         .stop = brcmf_usb_down,
1138         .txctl = brcmf_usb_tx_ctlpkt,
1139         .rxctl = brcmf_usb_rx_ctlpkt,
1140         .wowl_config = brcmf_usb_wowl_config,
1141 };
1142
1143 static int brcmf_usb_bus_setup(struct brcmf_usbdev_info *devinfo)
1144 {
1145         int ret;
1146
1147         /* Attach to the common driver interface */
1148         ret = brcmf_attach(devinfo->dev, devinfo->settings);
1149         if (ret) {
1150                 brcmf_err("brcmf_attach failed\n");
1151                 return ret;
1152         }
1153
1154         ret = brcmf_usb_up(devinfo->dev);
1155         if (ret)
1156                 goto fail;
1157
1158         ret = brcmf_bus_start(devinfo->dev);
1159         if (ret)
1160                 goto fail;
1161
1162         return 0;
1163 fail:
1164         brcmf_detach(devinfo->dev);
1165         return ret;
1166 }
1167
1168 static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1169                                    const struct firmware *fw,
1170                                    void *nvram, u32 nvlen)
1171 {
1172         struct brcmf_bus *bus = dev_get_drvdata(dev);
1173         struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1174
1175         if (ret)
1176                 goto error;
1177
1178         brcmf_dbg(USB, "Start fw downloading\n");
1179
1180         ret = check_file(fw->data);
1181         if (ret < 0) {
1182                 brcmf_err("invalid firmware\n");
1183                 release_firmware(fw);
1184                 goto error;
1185         }
1186
1187         devinfo->image = fw->data;
1188         devinfo->image_len = fw->size;
1189
1190         ret = brcmf_usb_fw_download(devinfo);
1191         release_firmware(fw);
1192         if (ret)
1193                 goto error;
1194
1195         ret = brcmf_usb_bus_setup(devinfo);
1196         if (ret)
1197                 goto error;
1198
1199         complete(&devinfo->dev_init_done);
1200         return;
1201 error:
1202         brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1203         complete(&devinfo->dev_init_done);
1204         device_release_driver(dev);
1205 }
1206
1207 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
1208 {
1209         struct brcmf_bus *bus = NULL;
1210         struct brcmf_usbdev *bus_pub = NULL;
1211         struct device *dev = devinfo->dev;
1212         int ret;
1213
1214         brcmf_dbg(USB, "Enter\n");
1215         bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1216         if (!bus_pub)
1217                 return -ENODEV;
1218
1219         bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC);
1220         if (!bus) {
1221                 ret = -ENOMEM;
1222                 goto fail;
1223         }
1224
1225         bus->dev = dev;
1226         bus_pub->bus = bus;
1227         bus->bus_priv.usb = bus_pub;
1228         dev_set_drvdata(dev, bus);
1229         bus->ops = &brcmf_usb_bus_ops;
1230         bus->proto_type = BRCMF_PROTO_BCDC;
1231         bus->always_use_fws_queue = true;
1232 #ifdef CONFIG_PM
1233         bus->wowl_supported = true;
1234 #endif
1235
1236         devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1237                                                    bus_pub->devid,
1238                                                    bus_pub->chiprev);
1239         if (!devinfo->settings) {
1240                 ret = -ENOMEM;
1241                 goto fail;
1242         }
1243
1244         if (!brcmf_usb_dlneeded(devinfo)) {
1245                 ret = brcmf_usb_bus_setup(devinfo);
1246                 if (ret)
1247                         goto fail;
1248                 /* we are done */
1249                 complete(&devinfo->dev_init_done);
1250                 return 0;
1251         }
1252         bus->chip = bus_pub->devid;
1253         bus->chiprev = bus_pub->chiprev;
1254
1255         ret = brcmf_fw_map_chip_to_name(bus_pub->devid, bus_pub->chiprev,
1256                                         brcmf_usb_fwnames,
1257                                         ARRAY_SIZE(brcmf_usb_fwnames),
1258                                         devinfo->fw_name, NULL);
1259         if (ret)
1260                 goto fail;
1261
1262         /* request firmware here */
1263         ret = brcmf_fw_get_firmwares(dev, 0, devinfo->fw_name, NULL,
1264                                      brcmf_usb_probe_phase2);
1265         if (ret) {
1266                 brcmf_err("firmware request failed: %d\n", ret);
1267                 goto fail;
1268         }
1269
1270         return 0;
1271
1272 fail:
1273         /* Release resources in reverse order */
1274         kfree(bus);
1275         brcmf_usb_detach(devinfo);
1276         return ret;
1277 }
1278
1279 static void
1280 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1281 {
1282         if (!devinfo)
1283                 return;
1284         brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1285
1286         brcmf_detach(devinfo->dev);
1287         kfree(devinfo->bus_pub.bus);
1288         brcmf_usb_detach(devinfo);
1289 }
1290
1291 static int
1292 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1293 {
1294         struct usb_device *usb = interface_to_usbdev(intf);
1295         struct brcmf_usbdev_info *devinfo;
1296         struct usb_interface_descriptor *desc;
1297         struct usb_endpoint_descriptor *endpoint;
1298         int ret = 0;
1299         u32 num_of_eps;
1300         u8 endpoint_num, ep;
1301
1302         brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1303
1304         devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1305         if (devinfo == NULL)
1306                 return -ENOMEM;
1307
1308         devinfo->usbdev = usb;
1309         devinfo->dev = &usb->dev;
1310         /* Init completion, to protect for disconnect while still loading.
1311          * Necessary because of the asynchronous firmware load construction
1312          */
1313         init_completion(&devinfo->dev_init_done);
1314
1315         usb_set_intfdata(intf, devinfo);
1316
1317         /* Check that the device supports only one configuration */
1318         if (usb->descriptor.bNumConfigurations != 1) {
1319                 brcmf_err("Number of configurations: %d not supported\n",
1320                           usb->descriptor.bNumConfigurations);
1321                 ret = -ENODEV;
1322                 goto fail;
1323         }
1324
1325         if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1326             (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1327             (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1328                 brcmf_err("Device class: 0x%x not supported\n",
1329                           usb->descriptor.bDeviceClass);
1330                 ret = -ENODEV;
1331                 goto fail;
1332         }
1333
1334         desc = &intf->cur_altsetting->desc;
1335         if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1336             (desc->bInterfaceSubClass != 2) ||
1337             (desc->bInterfaceProtocol != 0xff)) {
1338                 brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1339                           desc->bInterfaceNumber, desc->bInterfaceClass,
1340                           desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1341                 ret = -ENODEV;
1342                 goto fail;
1343         }
1344
1345         num_of_eps = desc->bNumEndpoints;
1346         for (ep = 0; ep < num_of_eps; ep++) {
1347                 endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1348                 endpoint_num = usb_endpoint_num(endpoint);
1349                 if (!usb_endpoint_xfer_bulk(endpoint))
1350                         continue;
1351                 if (usb_endpoint_dir_in(endpoint)) {
1352                         if (!devinfo->rx_pipe)
1353                                 devinfo->rx_pipe =
1354                                         usb_rcvbulkpipe(usb, endpoint_num);
1355                 } else {
1356                         if (!devinfo->tx_pipe)
1357                                 devinfo->tx_pipe =
1358                                         usb_sndbulkpipe(usb, endpoint_num);
1359                 }
1360         }
1361         if (devinfo->rx_pipe == 0) {
1362                 brcmf_err("No RX (in) Bulk EP found\n");
1363                 ret = -ENODEV;
1364                 goto fail;
1365         }
1366         if (devinfo->tx_pipe == 0) {
1367                 brcmf_err("No TX (out) Bulk EP found\n");
1368                 ret = -ENODEV;
1369                 goto fail;
1370         }
1371
1372         devinfo->ifnum = desc->bInterfaceNumber;
1373
1374         if (usb->speed == USB_SPEED_SUPER_PLUS)
1375                 brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1376         else if (usb->speed == USB_SPEED_SUPER)
1377                 brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1378         else if (usb->speed == USB_SPEED_HIGH)
1379                 brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1380         else
1381                 brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1382
1383         ret = brcmf_usb_probe_cb(devinfo);
1384         if (ret)
1385                 goto fail;
1386
1387         /* Success */
1388         return 0;
1389
1390 fail:
1391         complete(&devinfo->dev_init_done);
1392         kfree(devinfo);
1393         usb_set_intfdata(intf, NULL);
1394         return ret;
1395 }
1396
1397 static void
1398 brcmf_usb_disconnect(struct usb_interface *intf)
1399 {
1400         struct brcmf_usbdev_info *devinfo;
1401
1402         brcmf_dbg(USB, "Enter\n");
1403         devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1404
1405         if (devinfo) {
1406                 wait_for_completion(&devinfo->dev_init_done);
1407                 /* Make sure that devinfo still exists. Firmware probe routines
1408                  * may have released the device and cleared the intfdata.
1409                  */
1410                 if (!usb_get_intfdata(intf))
1411                         goto done;
1412
1413                 brcmf_usb_disconnect_cb(devinfo);
1414                 kfree(devinfo);
1415         }
1416 done:
1417         brcmf_dbg(USB, "Exit\n");
1418 }
1419
1420 /*
1421  * only need to signal the bus being down and update the state.
1422  */
1423 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1424 {
1425         struct usb_device *usb = interface_to_usbdev(intf);
1426         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1427
1428         brcmf_dbg(USB, "Enter\n");
1429         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1430         if (devinfo->wowl_enabled)
1431                 brcmf_cancel_all_urbs(devinfo);
1432         else
1433                 brcmf_detach(&usb->dev);
1434         return 0;
1435 }
1436
1437 /*
1438  * (re-) start the bus.
1439  */
1440 static int brcmf_usb_resume(struct usb_interface *intf)
1441 {
1442         struct usb_device *usb = interface_to_usbdev(intf);
1443         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1444
1445         brcmf_dbg(USB, "Enter\n");
1446         if (!devinfo->wowl_enabled)
1447                 return brcmf_usb_bus_setup(devinfo);
1448
1449         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1450         brcmf_usb_rx_fill_all(devinfo);
1451         return 0;
1452 }
1453
1454 static int brcmf_usb_reset_resume(struct usb_interface *intf)
1455 {
1456         struct usb_device *usb = interface_to_usbdev(intf);
1457         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1458
1459         brcmf_dbg(USB, "Enter\n");
1460
1461         return brcmf_fw_get_firmwares(&usb->dev, 0, devinfo->fw_name, NULL,
1462                                       brcmf_usb_probe_phase2);
1463 }
1464
1465 #define BRCMF_USB_DEVICE(dev_id)        \
1466         { USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id) }
1467
1468 #define LINKSYS_USB_DEVICE(dev_id)      \
1469         { USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id) }
1470
1471 static struct usb_device_id brcmf_usb_devid_table[] = {
1472         BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1473         BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1474         BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1475         BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1476         LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1477         { USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1478         /* special entry for device with firmware loaded and running */
1479         BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1480         { /* end: all zeroes */ }
1481 };
1482
1483 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1484
1485 static struct usb_driver brcmf_usbdrvr = {
1486         .name = KBUILD_MODNAME,
1487         .probe = brcmf_usb_probe,
1488         .disconnect = brcmf_usb_disconnect,
1489         .id_table = brcmf_usb_devid_table,
1490         .suspend = brcmf_usb_suspend,
1491         .resume = brcmf_usb_resume,
1492         .reset_resume = brcmf_usb_reset_resume,
1493         .disable_hub_initiated_lpm = 1,
1494 };
1495
1496 static int brcmf_usb_reset_device(struct device *dev, void *notused)
1497 {
1498         /* device past is the usb interface so we
1499          * need to use parent here.
1500          */
1501         brcmf_dev_reset(dev->parent);
1502         return 0;
1503 }
1504
1505 void brcmf_usb_exit(void)
1506 {
1507         struct device_driver *drv = &brcmf_usbdrvr.drvwrap.driver;
1508         int ret;
1509
1510         brcmf_dbg(USB, "Enter\n");
1511         ret = driver_for_each_device(drv, NULL, NULL,
1512                                      brcmf_usb_reset_device);
1513         usb_deregister(&brcmf_usbdrvr);
1514 }
1515
1516 void brcmf_usb_register(void)
1517 {
1518         brcmf_dbg(USB, "Enter\n");
1519         usb_register(&brcmf_usbdrvr);
1520 }