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

   1 // SPDX-License-Identifier: ISC
   2 /*
   3  * Copyright (c) 2011 Broadcom Corporation
   4  */
   5
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/firmware.h>
   9 #include <linux/usb.h>
  10 #include <linux/vmalloc.h>
  11
  12 #include <brcmu_utils.h>
  13 #include <brcm_hw_ids.h>
  14 #include <brcmu_wifi.h>
  15 #include "bus.h"
  16 #include "debug.h"
  17 #include "firmware.h"
  18 #include "usb.h"
  19 #include "core.h"
  20 #include "common.h"
  21 #include "bcdc.h"
  22
  23
  24 #define IOCTL_RESP_TIMEOUT              msecs_to_jiffies(2000)
  25
  26 #define BRCMF_USB_RESET_GETVER_SPINWAIT 100     /* in unit of ms */
  27 #define BRCMF_USB_RESET_GETVER_LOOP_CNT 10
  28
  29 #define BRCMF_POSTBOOT_ID               0xA123  /* ID to detect if dongle
  30                                                    has boot up */
  31 #define BRCMF_USB_NRXQ                  50
  32 #define BRCMF_USB_NTXQ                  50
  33
  34 #define BRCMF_USB_CBCTL_WRITE           0
  35 #define BRCMF_USB_CBCTL_READ            1
  36 #define BRCMF_USB_MAX_PKT_SIZE          1600
  37
  38 BRCMF_FW_DEF(43143, "brcmfmac43143");
  39 BRCMF_FW_DEF(43236B, "brcmfmac43236b");
  40 BRCMF_FW_DEF(43242A, "brcmfmac43242a");
  41 BRCMF_FW_DEF(43569, "brcmfmac43569");
  42 BRCMF_FW_DEF(4373, "brcmfmac4373");
  43
  44 static const struct brcmf_firmware_mapping brcmf_usb_fwnames[] = {
  45         BRCMF_FW_ENTRY(BRCM_CC_43143_CHIP_ID, 0xFFFFFFFF, 43143),
  46         BRCMF_FW_ENTRY(BRCM_CC_43235_CHIP_ID, 0x00000008, 43236B),
  47         BRCMF_FW_ENTRY(BRCM_CC_43236_CHIP_ID, 0x00000008, 43236B),
  48         BRCMF_FW_ENTRY(BRCM_CC_43238_CHIP_ID, 0x00000008, 43236B),
  49         BRCMF_FW_ENTRY(BRCM_CC_43242_CHIP_ID, 0xFFFFFFFF, 43242A),
  50         BRCMF_FW_ENTRY(BRCM_CC_43566_CHIP_ID, 0xFFFFFFFF, 43569),
  51         BRCMF_FW_ENTRY(BRCM_CC_43569_CHIP_ID, 0xFFFFFFFF, 43569),
  52         BRCMF_FW_ENTRY(CY_CC_4373_CHIP_ID, 0xFFFFFFFF, 4373)
  53 };
  54
  55 #define TRX_MAGIC               0x30524448      /* "HDR0" */
  56 #define TRX_MAX_OFFSET          3               /* Max number of file offsets */
  57 #define TRX_UNCOMP_IMAGE        0x20            /* Trx holds uncompressed img */
  58 #define TRX_RDL_CHUNK           1500            /* size of each dl transfer */
  59 #define TRX_OFFSETS_DLFWLEN_IDX 0
  60
  61 /* Control messages: bRequest values */
  62 #define DL_GETSTATE     0       /* returns the rdl_state_t struct */
  63 #define DL_CHECK_CRC    1       /* currently unused */
  64 #define DL_GO           2       /* execute downloaded image */
  65 #define DL_START        3       /* initialize dl state */
  66 #define DL_REBOOT       4       /* reboot the device in 2 seconds */
  67 #define DL_GETVER       5       /* returns the bootrom_id_t struct */
  68 #define DL_GO_PROTECTED 6       /* execute the downloaded code and set reset
  69                                  * event to occur in 2 seconds.  It is the
  70                                  * responsibility of the downloaded code to
  71                                  * clear this event
  72                                  */
  73 #define DL_EXEC         7       /* jump to a supplied address */
  74 #define DL_RESETCFG     8       /* To support single enum on dongle
  75                                  * - Not used by bootloader
  76                                  */
  77 #define DL_DEFER_RESP_OK 9      /* Potentially defer the response to setup
  78                                  * if resp unavailable
  79                                  */
  80
  81 /* states */
  82 #define DL_WAITING      0       /* waiting to rx first pkt */
  83 #define DL_READY        1       /* hdr was good, waiting for more of the
  84                                  * compressed image
  85                                  */
  86 #define DL_BAD_HDR      2       /* hdr was corrupted */
  87 #define DL_BAD_CRC      3       /* compressed image was corrupted */
  88 #define DL_RUNNABLE     4       /* download was successful,waiting for go cmd */
  89 #define DL_START_FAIL   5       /* failed to initialize correctly */
  90 #define DL_NVRAM_TOOBIG 6       /* host specified nvram data exceeds DL_NVRAM
  91                                  * value
  92                                  */
  93 #define DL_IMAGE_TOOBIG 7       /* firmware image too big */
  94
  95
  96 struct trx_header_le {
  97         __le32 magic;           /* "HDR0" */
  98         __le32 len;             /* Length of file including header */
  99         __le32 crc32;           /* CRC from flag_version to end of file */
 100         __le32 flag_version;    /* 0:15 flags, 16:31 version */
 101         __le32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of
 102                                          * header
 103                                          */
 104 };
 105
 106 struct rdl_state_le {
 107         __le32 state;
 108         __le32 bytes;
 109 };
 110
 111 struct bootrom_id_le {
 112         __le32 chip;            /* Chip id */
 113         __le32 chiprev;         /* Chip rev */
 114         __le32 ramsize;         /* Size of  RAM */
 115         __le32 remapbase;       /* Current remap base address */
 116         __le32 boardtype;       /* Type of board */
 117         __le32 boardrev;        /* Board revision */
 118 };
 119
 120 struct brcmf_usb_image {
 121         struct list_head list;
 122         s8 *fwname;
 123         u8 *image;
 124         int image_len;
 125 };
 126
 127 struct brcmf_usbdev_info {
 128         struct brcmf_usbdev bus_pub; /* MUST BE FIRST */
 129         spinlock_t qlock;
 130         struct list_head rx_freeq;
 131         struct list_head rx_postq;
 132         struct list_head tx_freeq;
 133         struct list_head tx_postq;
 134         uint rx_pipe, tx_pipe;
 135
 136         int rx_low_watermark;
 137         int tx_low_watermark;
 138         int tx_high_watermark;
 139         int tx_freecount;
 140         bool tx_flowblock;
 141         spinlock_t tx_flowblock_lock;
 142
 143         struct brcmf_usbreq *tx_reqs;
 144         struct brcmf_usbreq *rx_reqs;
 145
 146         char fw_name[BRCMF_FW_NAME_LEN];
 147         const u8 *image;        /* buffer for combine fw and nvram */
 148         int image_len;
 149
 150         struct usb_device *usbdev;
 151         struct device *dev;
 152         struct completion dev_init_done;
 153
 154         int ctl_in_pipe, ctl_out_pipe;
 155         struct urb *ctl_urb; /* URB for control endpoint */
 156         struct usb_ctrlrequest ctl_write;
 157         struct usb_ctrlrequest ctl_read;
 158         u32 ctl_urb_actual_length;
 159         int ctl_urb_status;
 160         int ctl_completed;
 161         wait_queue_head_t ioctl_resp_wait;
 162         ulong ctl_op;
 163         u8 ifnum;
 164
 165         struct urb *bulk_urb; /* used for FW download */
 166
 167         struct brcmf_mp_device *settings;
 168 };
 169
 170 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 171                                 struct brcmf_usbreq  *req);
 172
 173 static struct brcmf_usbdev *brcmf_usb_get_buspub(struct device *dev)
 174 {
 175         struct brcmf_bus *bus_if = dev_get_drvdata(dev);
 176         return bus_if->bus_priv.usb;
 177 }
 178
 179 static struct brcmf_usbdev_info *brcmf_usb_get_businfo(struct device *dev)
 180 {
 181         return brcmf_usb_get_buspub(dev)->devinfo;
 182 }
 183
 184 static int brcmf_usb_ioctl_resp_wait(struct brcmf_usbdev_info *devinfo)
 185 {
 186         return wait_event_timeout(devinfo->ioctl_resp_wait,
 187                                   devinfo->ctl_completed, IOCTL_RESP_TIMEOUT);
 188 }
 189
 190 static void brcmf_usb_ioctl_resp_wake(struct brcmf_usbdev_info *devinfo)
 191 {
 192         wake_up(&devinfo->ioctl_resp_wait);
 193 }
 194
 195 static void
 196 brcmf_usb_ctl_complete(struct brcmf_usbdev_info *devinfo, int type, int status)
 197 {
 198         brcmf_dbg(USB, "Enter, status=%d\n", status);
 199
 200         if (unlikely(devinfo == NULL))
 201                 return;
 202
 203         if (type == BRCMF_USB_CBCTL_READ) {
 204                 if (status == 0)
 205                         devinfo->bus_pub.stats.rx_ctlpkts++;
 206                 else
 207                         devinfo->bus_pub.stats.rx_ctlerrs++;
 208         } else if (type == BRCMF_USB_CBCTL_WRITE) {
 209                 if (status == 0)
 210                         devinfo->bus_pub.stats.tx_ctlpkts++;
 211                 else
 212                         devinfo->bus_pub.stats.tx_ctlerrs++;
 213         }
 214
 215         devinfo->ctl_urb_status = status;
 216         devinfo->ctl_completed = true;
 217         brcmf_usb_ioctl_resp_wake(devinfo);
 218 }
 219
 220 static void
 221 brcmf_usb_ctlread_complete(struct urb *urb)
 222 {
 223         struct brcmf_usbdev_info *devinfo =
 224                 (struct brcmf_usbdev_info *)urb->context;
 225
 226         brcmf_dbg(USB, "Enter\n");
 227         devinfo->ctl_urb_actual_length = urb->actual_length;
 228         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_READ,
 229                 urb->status);
 230 }
 231
 232 static void
 233 brcmf_usb_ctlwrite_complete(struct urb *urb)
 234 {
 235         struct brcmf_usbdev_info *devinfo =
 236                 (struct brcmf_usbdev_info *)urb->context;
 237
 238         brcmf_dbg(USB, "Enter\n");
 239         brcmf_usb_ctl_complete(devinfo, BRCMF_USB_CBCTL_WRITE,
 240                 urb->status);
 241 }
 242
 243 static int
 244 brcmf_usb_send_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 245 {
 246         int ret;
 247         u16 size;
 248
 249         brcmf_dbg(USB, "Enter\n");
 250         if (devinfo == NULL || buf == NULL ||
 251             len == 0 || devinfo->ctl_urb == NULL)
 252                 return -EINVAL;
 253
 254         size = len;
 255         devinfo->ctl_write.wLength = cpu_to_le16p(&size);
 256         devinfo->ctl_urb->transfer_buffer_length = size;
 257         devinfo->ctl_urb_status = 0;
 258         devinfo->ctl_urb_actual_length = 0;
 259
 260         usb_fill_control_urb(devinfo->ctl_urb,
 261                 devinfo->usbdev,
 262                 devinfo->ctl_out_pipe,
 263                 (unsigned char *) &devinfo->ctl_write,
 264                 buf, size,
 265                 (usb_complete_t)brcmf_usb_ctlwrite_complete,
 266                 devinfo);
 267
 268         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 269         if (ret < 0)
 270                 brcmf_err("usb_submit_urb failed %d\n", ret);
 271
 272         return ret;
 273 }
 274
 275 static int
 276 brcmf_usb_recv_ctl(struct brcmf_usbdev_info *devinfo, u8 *buf, int len)
 277 {
 278         int ret;
 279         u16 size;
 280
 281         brcmf_dbg(USB, "Enter\n");
 282         if ((devinfo == NULL) || (buf == NULL) || (len == 0)
 283                 || (devinfo->ctl_urb == NULL))
 284                 return -EINVAL;
 285
 286         size = len;
 287         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 288         devinfo->ctl_urb->transfer_buffer_length = size;
 289
 290         devinfo->ctl_read.bRequestType = USB_DIR_IN
 291                 | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 292         devinfo->ctl_read.bRequest = 1;
 293
 294         usb_fill_control_urb(devinfo->ctl_urb,
 295                 devinfo->usbdev,
 296                 devinfo->ctl_in_pipe,
 297                 (unsigned char *) &devinfo->ctl_read,
 298                 buf, size,
 299                 (usb_complete_t)brcmf_usb_ctlread_complete,
 300                 devinfo);
 301
 302         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 303         if (ret < 0)
 304                 brcmf_err("usb_submit_urb failed %d\n", ret);
 305
 306         return ret;
 307 }
 308
 309 static int brcmf_usb_tx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 310 {
 311         int err = 0;
 312         int timeout = 0;
 313         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 314         struct usb_interface *intf = to_usb_interface(dev);
 315
 316         brcmf_dbg(USB, "Enter\n");
 317
 318         err = usb_autopm_get_interface(intf);
 319         if (err)
 320                 goto out;
 321
 322         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 323                 err = -EIO;
 324                 goto fail;
 325         }
 326
 327         if (test_and_set_bit(0, &devinfo->ctl_op)) {
 328                 err = -EIO;
 329                 goto fail;
 330         }
 331
 332         devinfo->ctl_completed = false;
 333         err = brcmf_usb_send_ctl(devinfo, buf, len);
 334         if (err) {
 335                 brcmf_err("fail %d bytes: %d\n", err, len);
 336                 clear_bit(0, &devinfo->ctl_op);
 337                 goto fail;
 338         }
 339         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 340         if (!timeout) {
 341                 brcmf_err("Txctl wait timed out\n");
 342                 usb_kill_urb(devinfo->ctl_urb);
 343                 err = -EIO;
 344                 goto fail;
 345         }
 346         clear_bit(0, &devinfo->ctl_op);
 347
 348 fail:
 349         usb_autopm_put_interface(intf);
 350 out:
 351         return err;
 352 }
 353
 354 static int brcmf_usb_rx_ctlpkt(struct device *dev, u8 *buf, u32 len)
 355 {
 356         int err = 0;
 357         int timeout = 0;
 358         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 359         struct usb_interface *intf = to_usb_interface(dev);
 360
 361         brcmf_dbg(USB, "Enter\n");
 362
 363         err = usb_autopm_get_interface(intf);
 364         if (err)
 365                 goto out;
 366
 367         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 368                 err = -EIO;
 369                 goto fail;
 370         }
 371
 372         if (test_and_set_bit(0, &devinfo->ctl_op)) {
 373                 err = -EIO;
 374                 goto fail;
 375         }
 376
 377         devinfo->ctl_completed = false;
 378         err = brcmf_usb_recv_ctl(devinfo, buf, len);
 379         if (err) {
 380                 brcmf_err("fail %d bytes: %d\n", err, len);
 381                 clear_bit(0, &devinfo->ctl_op);
 382                 goto fail;
 383         }
 384         timeout = brcmf_usb_ioctl_resp_wait(devinfo);
 385         err = devinfo->ctl_urb_status;
 386         if (!timeout) {
 387                 brcmf_err("rxctl wait timed out\n");
 388                 usb_kill_urb(devinfo->ctl_urb);
 389                 err = -EIO;
 390                 goto fail;
 391         }
 392         clear_bit(0, &devinfo->ctl_op);
 393 fail:
 394         usb_autopm_put_interface(intf);
 395         if (!err)
 396                 return devinfo->ctl_urb_actual_length;
 397 out:
 398         return err;
 399 }
 400
 401 static struct brcmf_usbreq *brcmf_usb_deq(struct brcmf_usbdev_info *devinfo,
 402                                           struct list_head *q, int *counter)
 403 {
 404         unsigned long flags;
 405         struct brcmf_usbreq  *req;
 406         spin_lock_irqsave(&devinfo->qlock, flags);
 407         if (list_empty(q)) {
 408                 spin_unlock_irqrestore(&devinfo->qlock, flags);
 409                 return NULL;
 410         }
 411         req = list_entry(q->next, struct brcmf_usbreq, list);
 412         list_del_init(q->next);
 413         if (counter)
 414                 (*counter)--;
 415         spin_unlock_irqrestore(&devinfo->qlock, flags);
 416         return req;
 417
 418 }
 419
 420 static void brcmf_usb_enq(struct brcmf_usbdev_info *devinfo,
 421                           struct list_head *q, struct brcmf_usbreq *req,
 422                           int *counter)
 423 {
 424         unsigned long flags;
 425         spin_lock_irqsave(&devinfo->qlock, flags);
 426         list_add_tail(&req->list, q);
 427         if (counter)
 428                 (*counter)++;
 429         spin_unlock_irqrestore(&devinfo->qlock, flags);
 430 }
 431
 432 static struct brcmf_usbreq *
 433 brcmf_usbdev_qinit(struct list_head *q, int qsize)
 434 {
 435         int i;
 436         struct brcmf_usbreq *req, *reqs;
 437
 438         reqs = kcalloc(qsize, sizeof(struct brcmf_usbreq), GFP_ATOMIC);
 439         if (reqs == NULL)
 440                 return NULL;
 441
 442         req = reqs;
 443
 444         for (i = 0; i < qsize; i++) {
 445                 req->urb = usb_alloc_urb(0, GFP_ATOMIC);
 446                 if (!req->urb)
 447                         goto fail;
 448
 449                 INIT_LIST_HEAD(&req->list);
 450                 list_add_tail(&req->list, q);
 451                 req++;
 452         }
 453         return reqs;
 454 fail:
 455         brcmf_err("fail!\n");
 456         while (!list_empty(q)) {
 457                 req = list_entry(q->next, struct brcmf_usbreq, list);
 458                 if (req)
 459                         usb_free_urb(req->urb);
 460                 list_del(q->next);
 461         }
 462         kfree(reqs);
 463         return NULL;
 464
 465 }
 466
 467 static void brcmf_usb_free_q(struct list_head *q)
 468 {
 469         struct brcmf_usbreq *req, *next;
 470
 471         list_for_each_entry_safe(req, next, q, list) {
 472                 if (!req->urb) {
 473                         brcmf_err("bad req\n");
 474                         break;
 475                 }
 476                 usb_free_urb(req->urb);
 477                 list_del_init(&req->list);
 478         }
 479 }
 480
 481 static void brcmf_usb_del_fromq(struct brcmf_usbdev_info *devinfo,
 482                                 struct brcmf_usbreq *req)
 483 {
 484         unsigned long flags;
 485
 486         spin_lock_irqsave(&devinfo->qlock, flags);
 487         list_del_init(&req->list);
 488         spin_unlock_irqrestore(&devinfo->qlock, flags);
 489 }
 490
 491
 492 static void brcmf_usb_tx_complete(struct urb *urb)
 493 {
 494         struct brcmf_usbreq *req = (struct brcmf_usbreq *)urb->context;
 495         struct brcmf_usbdev_info *devinfo = req->devinfo;
 496         unsigned long flags;
 497
 498         brcmf_dbg(USB, "Enter, urb->status=%d, skb=%p\n", urb->status,
 499                   req->skb);
 500         brcmf_usb_del_fromq(devinfo, req);
 501
 502         brcmf_proto_bcdc_txcomplete(devinfo->dev, req->skb, urb->status == 0);
 503         req->skb = NULL;
 504         brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req, &devinfo->tx_freecount);
 505         spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 506         if (devinfo->tx_freecount > devinfo->tx_high_watermark &&
 507                 devinfo->tx_flowblock) {
 508                 brcmf_proto_bcdc_txflowblock(devinfo->dev, false);
 509                 devinfo->tx_flowblock = false;
 510         }
 511         spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 512 }
 513
 514 static void brcmf_usb_rx_complete(struct urb *urb)
 515 {
 516         struct brcmf_usbreq  *req = (struct brcmf_usbreq *)urb->context;
 517         struct brcmf_usbdev_info *devinfo = req->devinfo;
 518         struct sk_buff *skb;
 519
 520         brcmf_dbg(USB, "Enter, urb->status=%d\n", urb->status);
 521         brcmf_usb_del_fromq(devinfo, req);
 522         skb = req->skb;
 523         req->skb = NULL;
 524
 525         /* zero length packets indicate usb "failure". Do not refill */
 526         if (urb->status != 0 || !urb->actual_length) {
 527                 brcmu_pkt_buf_free_skb(skb);
 528                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 529                 return;
 530         }
 531
 532         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP ||
 533             devinfo->bus_pub.state == BRCMFMAC_USB_STATE_SLEEP) {
 534                 skb_put(skb, urb->actual_length);
 535                 brcmf_rx_frame(devinfo->dev, skb, true, true);
 536                 brcmf_usb_rx_refill(devinfo, req);
 537                 usb_mark_last_busy(urb->dev);
 538         } else {
 539                 brcmu_pkt_buf_free_skb(skb);
 540                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 541         }
 542         return;
 543
 544 }
 545
 546 static void brcmf_usb_rx_refill(struct brcmf_usbdev_info *devinfo,
 547                                 struct brcmf_usbreq  *req)
 548 {
 549         struct sk_buff *skb;
 550         int ret;
 551
 552         if (!req || !devinfo)
 553                 return;
 554
 555         skb = dev_alloc_skb(devinfo->bus_pub.bus_mtu);
 556         if (!skb) {
 557                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 558                 return;
 559         }
 560         req->skb = skb;
 561
 562         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->rx_pipe,
 563                           skb->data, skb_tailroom(skb), brcmf_usb_rx_complete,
 564                           req);
 565         req->devinfo = devinfo;
 566         brcmf_usb_enq(devinfo, &devinfo->rx_postq, req, NULL);
 567
 568         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 569         if (ret) {
 570                 brcmf_usb_del_fromq(devinfo, req);
 571                 brcmu_pkt_buf_free_skb(req->skb);
 572                 req->skb = NULL;
 573                 brcmf_usb_enq(devinfo, &devinfo->rx_freeq, req, NULL);
 574         }
 575         return;
 576 }
 577
 578 static void brcmf_usb_rx_fill_all(struct brcmf_usbdev_info *devinfo)
 579 {
 580         struct brcmf_usbreq *req;
 581
 582         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 583                 brcmf_err("bus is not up=%d\n", devinfo->bus_pub.state);
 584                 return;
 585         }
 586         while ((req = brcmf_usb_deq(devinfo, &devinfo->rx_freeq, NULL)) != NULL)
 587                 brcmf_usb_rx_refill(devinfo, req);
 588 }
 589
 590 static void
 591 brcmf_usb_state_change(struct brcmf_usbdev_info *devinfo, int state)
 592 {
 593         struct brcmf_bus *bcmf_bus = devinfo->bus_pub.bus;
 594
 595         brcmf_dbg(USB, "Enter, current state=%d, new state=%d\n",
 596                   devinfo->bus_pub.state, state);
 597
 598         if (devinfo->bus_pub.state == state)
 599                 return;
 600
 601         devinfo->bus_pub.state = state;
 602
 603         /* update state of upper layer */
 604         if (state == BRCMFMAC_USB_STATE_DOWN) {
 605                 brcmf_dbg(USB, "DBUS is down\n");
 606                 brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_DOWN);
 607         } else if (state == BRCMFMAC_USB_STATE_UP) {
 608                 brcmf_dbg(USB, "DBUS is up\n");
 609                 brcmf_bus_change_state(bcmf_bus, BRCMF_BUS_UP);
 610         } else {
 611                 brcmf_dbg(USB, "DBUS current state=%d\n", state);
 612         }
 613 }
 614
 615 static int brcmf_usb_tx(struct device *dev, struct sk_buff *skb)
 616 {
 617         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 618         struct brcmf_usbreq  *req;
 619         int ret;
 620         unsigned long flags;
 621         struct usb_interface *intf = to_usb_interface(dev);
 622
 623         ret = usb_autopm_get_interface(intf);
 624         if (ret)
 625                 goto out;
 626
 627         brcmf_dbg(USB, "Enter, skb=%p\n", skb);
 628         if (devinfo->bus_pub.state != BRCMFMAC_USB_STATE_UP) {
 629                 ret = -EIO;
 630                 goto fail;
 631         }
 632
 633         req = brcmf_usb_deq(devinfo, &devinfo->tx_freeq,
 634                                         &devinfo->tx_freecount);
 635         if (!req) {
 636                 brcmf_err("no req to send\n");
 637                 ret = -ENOMEM;
 638                 goto fail;
 639         }
 640
 641         req->skb = skb;
 642         req->devinfo = devinfo;
 643         usb_fill_bulk_urb(req->urb, devinfo->usbdev, devinfo->tx_pipe,
 644                           skb->data, skb->len, brcmf_usb_tx_complete, req);
 645         req->urb->transfer_flags |= URB_ZERO_PACKET;
 646         brcmf_usb_enq(devinfo, &devinfo->tx_postq, req, NULL);
 647         ret = usb_submit_urb(req->urb, GFP_ATOMIC);
 648         if (ret) {
 649                 brcmf_err("brcmf_usb_tx usb_submit_urb FAILED\n");
 650                 brcmf_usb_del_fromq(devinfo, req);
 651                 req->skb = NULL;
 652                 brcmf_usb_enq(devinfo, &devinfo->tx_freeq, req,
 653                               &devinfo->tx_freecount);
 654                 goto fail;
 655         }
 656
 657         spin_lock_irqsave(&devinfo->tx_flowblock_lock, flags);
 658         if (devinfo->tx_freecount < devinfo->tx_low_watermark &&
 659             !devinfo->tx_flowblock) {
 660                 brcmf_proto_bcdc_txflowblock(dev, true);
 661                 devinfo->tx_flowblock = true;
 662         }
 663         spin_unlock_irqrestore(&devinfo->tx_flowblock_lock, flags);
 664
 665 fail:
 666         usb_autopm_put_interface(intf);
 667 out:
 668         return ret;
 669 }
 670
 671
 672 static int brcmf_usb_up(struct device *dev)
 673 {
 674         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 675
 676         brcmf_dbg(USB, "Enter\n");
 677         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_UP)
 678                 return 0;
 679
 680         /* Success, indicate devinfo is fully up */
 681         brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_UP);
 682
 683         if (devinfo->ctl_urb) {
 684                 devinfo->ctl_in_pipe = usb_rcvctrlpipe(devinfo->usbdev, 0);
 685                 devinfo->ctl_out_pipe = usb_sndctrlpipe(devinfo->usbdev, 0);
 686
 687                 /* CTL Write */
 688                 devinfo->ctl_write.bRequestType =
 689                         USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 690                 devinfo->ctl_write.bRequest = 0;
 691                 devinfo->ctl_write.wValue = cpu_to_le16(0);
 692                 devinfo->ctl_write.wIndex = cpu_to_le16(devinfo->ifnum);
 693
 694                 /* CTL Read */
 695                 devinfo->ctl_read.bRequestType =
 696                         USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE;
 697                 devinfo->ctl_read.bRequest = 1;
 698                 devinfo->ctl_read.wValue = cpu_to_le16(0);
 699                 devinfo->ctl_read.wIndex = cpu_to_le16(devinfo->ifnum);
 700         }
 701         brcmf_usb_rx_fill_all(devinfo);
 702         return 0;
 703 }
 704
 705 static void brcmf_cancel_all_urbs(struct brcmf_usbdev_info *devinfo)
 706 {
 707         int i;
 708
 709         if (devinfo->ctl_urb)
 710                 usb_kill_urb(devinfo->ctl_urb);
 711         if (devinfo->bulk_urb)
 712                 usb_kill_urb(devinfo->bulk_urb);
 713         if (devinfo->tx_reqs)
 714                 for (i = 0; i < devinfo->bus_pub.ntxq; i++)
 715                         usb_kill_urb(devinfo->tx_reqs[i].urb);
 716         if (devinfo->rx_reqs)
 717                 for (i = 0; i < devinfo->bus_pub.nrxq; i++)
 718                         usb_kill_urb(devinfo->rx_reqs[i].urb);
 719 }
 720
 721 static void brcmf_usb_down(struct device *dev)
 722 {
 723         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(dev);
 724
 725         brcmf_dbg(USB, "Enter\n");
 726         if (devinfo == NULL)
 727                 return;
 728
 729         if (devinfo->bus_pub.state == BRCMFMAC_USB_STATE_DOWN)
 730                 return;
 731
 732         brcmf_usb_state_change(devinfo, BRCMFMAC_USB_STATE_DOWN);
 733
 734         brcmf_cancel_all_urbs(devinfo);
 735 }
 736
 737 static void
 738 brcmf_usb_sync_complete(struct urb *urb)
 739 {
 740         struct brcmf_usbdev_info *devinfo =
 741                         (struct brcmf_usbdev_info *)urb->context;
 742
 743         devinfo->ctl_completed = true;
 744         brcmf_usb_ioctl_resp_wake(devinfo);
 745 }
 746
 747 static int brcmf_usb_dl_cmd(struct brcmf_usbdev_info *devinfo, u8 cmd,
 748                             void *buffer, int buflen)
 749 {
 750         int ret;
 751         char *tmpbuf;
 752         u16 size;
 753
 754         if ((!devinfo) || (devinfo->ctl_urb == NULL))
 755                 return -EINVAL;
 756
 757         tmpbuf = kmalloc(buflen, GFP_ATOMIC);
 758         if (!tmpbuf)
 759                 return -ENOMEM;
 760
 761         size = buflen;
 762         devinfo->ctl_urb->transfer_buffer_length = size;
 763
 764         devinfo->ctl_read.wLength = cpu_to_le16p(&size);
 765         devinfo->ctl_read.bRequestType = USB_DIR_IN | USB_TYPE_VENDOR |
 766                 USB_RECIP_INTERFACE;
 767         devinfo->ctl_read.bRequest = cmd;
 768
 769         usb_fill_control_urb(devinfo->ctl_urb,
 770                 devinfo->usbdev,
 771                 usb_rcvctrlpipe(devinfo->usbdev, 0),
 772                 (unsigned char *) &devinfo->ctl_read,
 773                 (void *) tmpbuf, size,
 774                 (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 775
 776         devinfo->ctl_completed = false;
 777         ret = usb_submit_urb(devinfo->ctl_urb, GFP_ATOMIC);
 778         if (ret < 0) {
 779                 brcmf_err("usb_submit_urb failed %d\n", ret);
 780                 goto finalize;
 781         }
 782
 783         if (!brcmf_usb_ioctl_resp_wait(devinfo)) {
 784                 usb_kill_urb(devinfo->ctl_urb);
 785                 ret = -ETIMEDOUT;
 786         } else {
 787                 memcpy(buffer, tmpbuf, buflen);
 788         }
 789
 790 finalize:
 791         kfree(tmpbuf);
 792         return ret;
 793 }
 794
 795 static bool
 796 brcmf_usb_dlneeded(struct brcmf_usbdev_info *devinfo)
 797 {
 798         struct bootrom_id_le id;
 799         u32 chipid, chiprev;
 800
 801         brcmf_dbg(USB, "Enter\n");
 802
 803         if (devinfo == NULL)
 804                 return false;
 805
 806         /* Check if firmware downloaded already by querying runtime ID */
 807         id.chip = cpu_to_le32(0xDEAD);
 808         brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 809
 810         chipid = le32_to_cpu(id.chip);
 811         chiprev = le32_to_cpu(id.chiprev);
 812
 813         if ((chipid & 0x4300) == 0x4300)
 814                 brcmf_dbg(USB, "chip %x rev 0x%x\n", chipid, chiprev);
 815         else
 816                 brcmf_dbg(USB, "chip %d rev 0x%x\n", chipid, chiprev);
 817         if (chipid == BRCMF_POSTBOOT_ID) {
 818                 brcmf_dbg(USB, "firmware already downloaded\n");
 819                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 820                 return false;
 821         } else {
 822                 devinfo->bus_pub.devid = chipid;
 823                 devinfo->bus_pub.chiprev = chiprev;
 824         }
 825         return true;
 826 }
 827
 828 static int
 829 brcmf_usb_resetcfg(struct brcmf_usbdev_info *devinfo)
 830 {
 831         struct bootrom_id_le id;
 832         u32 loop_cnt;
 833         int err;
 834
 835         brcmf_dbg(USB, "Enter\n");
 836
 837         loop_cnt = 0;
 838         do {
 839                 mdelay(BRCMF_USB_RESET_GETVER_SPINWAIT);
 840                 loop_cnt++;
 841                 id.chip = cpu_to_le32(0xDEAD);       /* Get the ID */
 842                 err = brcmf_usb_dl_cmd(devinfo, DL_GETVER, &id, sizeof(id));
 843                 if ((err) && (err != -ETIMEDOUT))
 844                         return err;
 845                 if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID))
 846                         break;
 847         } while (loop_cnt < BRCMF_USB_RESET_GETVER_LOOP_CNT);
 848
 849         if (id.chip == cpu_to_le32(BRCMF_POSTBOOT_ID)) {
 850                 brcmf_dbg(USB, "postboot chip 0x%x/rev 0x%x\n",
 851                           le32_to_cpu(id.chip), le32_to_cpu(id.chiprev));
 852
 853                 brcmf_usb_dl_cmd(devinfo, DL_RESETCFG, &id, sizeof(id));
 854                 return 0;
 855         } else {
 856                 brcmf_err("Cannot talk to Dongle. Firmware is not UP, %d ms\n",
 857                           BRCMF_USB_RESET_GETVER_SPINWAIT * loop_cnt);
 858                 return -EINVAL;
 859         }
 860 }
 861
 862
 863 static int
 864 brcmf_usb_dl_send_bulk(struct brcmf_usbdev_info *devinfo, void *buffer, int len)
 865 {
 866         int ret;
 867
 868         if ((devinfo == NULL) || (devinfo->bulk_urb == NULL))
 869                 return -EINVAL;
 870
 871         /* Prepare the URB */
 872         usb_fill_bulk_urb(devinfo->bulk_urb, devinfo->usbdev,
 873                           devinfo->tx_pipe, buffer, len,
 874                           (usb_complete_t)brcmf_usb_sync_complete, devinfo);
 875
 876         devinfo->bulk_urb->transfer_flags |= URB_ZERO_PACKET;
 877
 878         devinfo->ctl_completed = false;
 879         ret = usb_submit_urb(devinfo->bulk_urb, GFP_ATOMIC);
 880         if (ret) {
 881                 brcmf_err("usb_submit_urb failed %d\n", ret);
 882                 return ret;
 883         }
 884         ret = brcmf_usb_ioctl_resp_wait(devinfo);
 885         return (ret == 0);
 886 }
 887
 888 static int
 889 brcmf_usb_dl_writeimage(struct brcmf_usbdev_info *devinfo, u8 *fw, int fwlen)
 890 {
 891         unsigned int sendlen, sent, dllen;
 892         char *bulkchunk = NULL, *dlpos;
 893         struct rdl_state_le state;
 894         u32 rdlstate, rdlbytes;
 895         int err = 0;
 896
 897         brcmf_dbg(USB, "Enter, fw %p, len %d\n", fw, fwlen);
 898
 899         bulkchunk = kmalloc(TRX_RDL_CHUNK, GFP_ATOMIC);
 900         if (bulkchunk == NULL) {
 901                 err = -ENOMEM;
 902                 goto fail;
 903         }
 904
 905         /* 1) Prepare USB boot loader for runtime image */
 906         brcmf_usb_dl_cmd(devinfo, DL_START, &state, sizeof(state));
 907
 908         rdlstate = le32_to_cpu(state.state);
 909         rdlbytes = le32_to_cpu(state.bytes);
 910
 911         /* 2) Check we are in the Waiting state */
 912         if (rdlstate != DL_WAITING) {
 913                 brcmf_err("Failed to DL_START\n");
 914                 err = -EINVAL;
 915                 goto fail;
 916         }
 917         sent = 0;
 918         dlpos = fw;
 919         dllen = fwlen;
 920
 921         /* Get chip id and rev */
 922         while (rdlbytes != dllen) {
 923                 /* Wait until the usb device reports it received all
 924                  * the bytes we sent */
 925                 if ((rdlbytes == sent) && (rdlbytes != dllen)) {
 926                         if ((dllen-sent) < TRX_RDL_CHUNK)
 927                                 sendlen = dllen-sent;
 928                         else
 929                                 sendlen = TRX_RDL_CHUNK;
 930
 931                         /* simply avoid having to send a ZLP by ensuring we
 932                          * never have an even
 933                          * multiple of 64
 934                          */
 935                         if (!(sendlen % 64))
 936                                 sendlen -= 4;
 937
 938                         /* send data */
 939                         memcpy(bulkchunk, dlpos, sendlen);
 940                         if (brcmf_usb_dl_send_bulk(devinfo, bulkchunk,
 941                                                    sendlen)) {
 942                                 brcmf_err("send_bulk failed\n");
 943                                 err = -EINVAL;
 944                                 goto fail;
 945                         }
 946
 947                         dlpos += sendlen;
 948                         sent += sendlen;
 949                 }
 950                 err = brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state,
 951                                        sizeof(state));
 952                 if (err) {
 953                         brcmf_err("DL_GETSTATE Failed\n");
 954                         goto fail;
 955                 }
 956
 957                 rdlstate = le32_to_cpu(state.state);
 958                 rdlbytes = le32_to_cpu(state.bytes);
 959
 960                 /* restart if an error is reported */
 961                 if (rdlstate == DL_BAD_HDR || rdlstate == DL_BAD_CRC) {
 962                         brcmf_err("Bad Hdr or Bad CRC state %d\n",
 963                                   rdlstate);
 964                         err = -EINVAL;
 965                         goto fail;
 966                 }
 967         }
 968
 969 fail:
 970         kfree(bulkchunk);
 971         brcmf_dbg(USB, "Exit, err=%d\n", err);
 972         return err;
 973 }
 974
 975 static int brcmf_usb_dlstart(struct brcmf_usbdev_info *devinfo, u8 *fw, int len)
 976 {
 977         int err;
 978
 979         brcmf_dbg(USB, "Enter\n");
 980
 981         if (devinfo == NULL)
 982                 return -EINVAL;
 983
 984         if (devinfo->bus_pub.devid == 0xDEAD)
 985                 return -EINVAL;
 986
 987         err = brcmf_usb_dl_writeimage(devinfo, fw, len);
 988         if (err == 0)
 989                 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_DONE;
 990         else
 991                 devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DL_FAIL;
 992         brcmf_dbg(USB, "Exit, err=%d\n", err);
 993
 994         return err;
 995 }
 996
 997 static int brcmf_usb_dlrun(struct brcmf_usbdev_info *devinfo)
 998 {
 999         struct rdl_state_le state;
1000
1001         brcmf_dbg(USB, "Enter\n");
1002         if (!devinfo)
1003                 return -EINVAL;
1004
1005         if (devinfo->bus_pub.devid == 0xDEAD)
1006                 return -EINVAL;
1007
1008         /* Check we are runnable */
1009         state.state = 0;
1010         brcmf_usb_dl_cmd(devinfo, DL_GETSTATE, &state, sizeof(state));
1011
1012         /* Start the image */
1013         if (state.state == cpu_to_le32(DL_RUNNABLE)) {
1014                 if (brcmf_usb_dl_cmd(devinfo, DL_GO, &state, sizeof(state)))
1015                         return -ENODEV;
1016                 if (brcmf_usb_resetcfg(devinfo))
1017                         return -ENODEV;
1018                 /* The Dongle may go for re-enumeration. */
1019         } else {
1020                 brcmf_err("Dongle not runnable\n");
1021                 return -EINVAL;
1022         }
1023         brcmf_dbg(USB, "Exit\n");
1024         return 0;
1025 }
1026
1027 static int
1028 brcmf_usb_fw_download(struct brcmf_usbdev_info *devinfo)
1029 {
1030         int err;
1031         struct usb_interface *intf;
1032
1033         brcmf_dbg(USB, "Enter\n");
1034         if (!devinfo) {
1035                 err = -ENODEV;
1036                 goto out;
1037         }
1038
1039         if (!devinfo->image) {
1040                 brcmf_err("No firmware!\n");
1041                 err = -ENOENT;
1042                 goto out;
1043         }
1044
1045         intf = to_usb_interface(devinfo->dev);
1046         err = usb_autopm_get_interface(intf);
1047         if (err)
1048                 goto out;
1049
1050         err = brcmf_usb_dlstart(devinfo,
1051                 (u8 *)devinfo->image, devinfo->image_len);
1052         if (err == 0)
1053                 err = brcmf_usb_dlrun(devinfo);
1054
1055         usb_autopm_put_interface(intf);
1056 out:
1057         return err;
1058 }
1059
1060
1061 static void brcmf_usb_detach(struct brcmf_usbdev_info *devinfo)
1062 {
1063         brcmf_dbg(USB, "Enter, devinfo %p\n", devinfo);
1064
1065         /* free the URBS */
1066         brcmf_usb_free_q(&devinfo->rx_freeq);
1067         brcmf_usb_free_q(&devinfo->tx_freeq);
1068
1069         usb_free_urb(devinfo->ctl_urb);
1070         usb_free_urb(devinfo->bulk_urb);
1071
1072         kfree(devinfo->tx_reqs);
1073         kfree(devinfo->rx_reqs);
1074
1075         if (devinfo->settings)
1076                 brcmf_release_module_param(devinfo->settings);
1077 }
1078
1079
1080 static int check_file(const u8 *headers)
1081 {
1082         struct trx_header_le *trx;
1083         int actual_len = -1;
1084
1085         brcmf_dbg(USB, "Enter\n");
1086         /* Extract trx header */
1087         trx = (struct trx_header_le *) headers;
1088         if (trx->magic != cpu_to_le32(TRX_MAGIC))
1089                 return -1;
1090
1091         headers += sizeof(struct trx_header_le);
1092
1093         if (le32_to_cpu(trx->flag_version) & TRX_UNCOMP_IMAGE) {
1094                 actual_len = le32_to_cpu(trx->offsets[TRX_OFFSETS_DLFWLEN_IDX]);
1095                 return actual_len + sizeof(struct trx_header_le);
1096         }
1097         return -1;
1098 }
1099
1100
1101 static
1102 struct brcmf_usbdev *brcmf_usb_attach(struct brcmf_usbdev_info *devinfo,
1103                                       int nrxq, int ntxq)
1104 {
1105         brcmf_dbg(USB, "Enter\n");
1106
1107         devinfo->bus_pub.nrxq = nrxq;
1108         devinfo->rx_low_watermark = nrxq / 2;
1109         devinfo->bus_pub.devinfo = devinfo;
1110         devinfo->bus_pub.ntxq = ntxq;
1111         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_DOWN;
1112
1113         /* flow control when too many tx urbs posted */
1114         devinfo->tx_low_watermark = ntxq / 4;
1115         devinfo->tx_high_watermark = devinfo->tx_low_watermark * 3;
1116         devinfo->bus_pub.bus_mtu = BRCMF_USB_MAX_PKT_SIZE;
1117
1118         /* Initialize other structure content */
1119         init_waitqueue_head(&devinfo->ioctl_resp_wait);
1120
1121         /* Initialize the spinlocks */
1122         spin_lock_init(&devinfo->qlock);
1123         spin_lock_init(&devinfo->tx_flowblock_lock);
1124
1125         INIT_LIST_HEAD(&devinfo->rx_freeq);
1126         INIT_LIST_HEAD(&devinfo->rx_postq);
1127
1128         INIT_LIST_HEAD(&devinfo->tx_freeq);
1129         INIT_LIST_HEAD(&devinfo->tx_postq);
1130
1131         devinfo->tx_flowblock = false;
1132
1133         devinfo->rx_reqs = brcmf_usbdev_qinit(&devinfo->rx_freeq, nrxq);
1134         if (!devinfo->rx_reqs)
1135                 goto error;
1136
1137         devinfo->tx_reqs = brcmf_usbdev_qinit(&devinfo->tx_freeq, ntxq);
1138         if (!devinfo->tx_reqs)
1139                 goto error;
1140         devinfo->tx_freecount = ntxq;
1141
1142         devinfo->ctl_urb = usb_alloc_urb(0, GFP_ATOMIC);
1143         if (!devinfo->ctl_urb)
1144                 goto error;
1145         devinfo->bulk_urb = usb_alloc_urb(0, GFP_ATOMIC);
1146         if (!devinfo->bulk_urb)
1147                 goto error;
1148
1149         return &devinfo->bus_pub;
1150
1151 error:
1152         brcmf_err("failed!\n");
1153         brcmf_usb_detach(devinfo);
1154         return NULL;
1155 }
1156
1157 static
1158 int brcmf_usb_get_fwname(struct device *dev, const char *ext, u8 *fw_name)
1159 {
1160         struct brcmf_bus *bus = dev_get_drvdata(dev);
1161         struct brcmf_fw_request *fwreq;
1162         struct brcmf_fw_name fwnames[] = {
1163                 { ext, fw_name },
1164         };
1165
1166         fwreq = brcmf_fw_alloc_request(bus->chip, bus->chiprev,
1167                                        brcmf_usb_fwnames,
1168                                        ARRAY_SIZE(brcmf_usb_fwnames),
1169                                        fwnames, ARRAY_SIZE(fwnames));
1170         if (!fwreq)
1171                 return -ENOMEM;
1172
1173         kfree(fwreq);
1174         return 0;
1175 }
1176
1177 static const struct brcmf_bus_ops brcmf_usb_bus_ops = {
1178         .preinit = brcmf_usb_up,
1179         .stop = brcmf_usb_down,
1180         .txdata = brcmf_usb_tx,
1181         .txctl = brcmf_usb_tx_ctlpkt,
1182         .rxctl = brcmf_usb_rx_ctlpkt,
1183         .get_fwname = brcmf_usb_get_fwname,
1184 };
1185
1186 #define BRCMF_USB_FW_CODE       0
1187
1188 static void brcmf_usb_probe_phase2(struct device *dev, int ret,
1189                                    struct brcmf_fw_request *fwreq)
1190 {
1191         struct brcmf_bus *bus = dev_get_drvdata(dev);
1192         struct brcmf_usbdev_info *devinfo = bus->bus_priv.usb->devinfo;
1193         const struct firmware *fw;
1194
1195         if (ret)
1196                 goto error;
1197
1198         brcmf_dbg(USB, "Start fw downloading\n");
1199
1200         fw = fwreq->items[BRCMF_USB_FW_CODE].binary;
1201         kfree(fwreq);
1202
1203         ret = check_file(fw->data);
1204         if (ret < 0) {
1205                 brcmf_err("invalid firmware\n");
1206                 release_firmware(fw);
1207                 goto error;
1208         }
1209
1210         devinfo->image = fw->data;
1211         devinfo->image_len = fw->size;
1212
1213         ret = brcmf_usb_fw_download(devinfo);
1214         release_firmware(fw);
1215         if (ret)
1216                 goto error;
1217
1218         ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1219         if (ret)
1220                 goto error;
1221
1222         /* Attach to the common driver interface */
1223         ret = brcmf_attach(devinfo->dev);
1224         if (ret)
1225                 goto error;
1226
1227         complete(&devinfo->dev_init_done);
1228         return;
1229 error:
1230         brcmf_dbg(TRACE, "failed: dev=%s, err=%d\n", dev_name(dev), ret);
1231         complete(&devinfo->dev_init_done);
1232         device_release_driver(dev);
1233 }
1234
1235 static struct brcmf_fw_request *
1236 brcmf_usb_prepare_fw_request(struct brcmf_usbdev_info *devinfo)
1237 {
1238         struct brcmf_fw_request *fwreq;
1239         struct brcmf_fw_name fwnames[] = {
1240                 { ".bin", devinfo->fw_name },
1241         };
1242
1243         fwreq = brcmf_fw_alloc_request(devinfo->bus_pub.devid,
1244                                        devinfo->bus_pub.chiprev,
1245                                        brcmf_usb_fwnames,
1246                                        ARRAY_SIZE(brcmf_usb_fwnames),
1247                                        fwnames, ARRAY_SIZE(fwnames));
1248         if (!fwreq)
1249                 return NULL;
1250
1251         fwreq->items[BRCMF_USB_FW_CODE].type = BRCMF_FW_TYPE_BINARY;
1252
1253         return fwreq;
1254 }
1255
1256 static int brcmf_usb_probe_cb(struct brcmf_usbdev_info *devinfo)
1257 {
1258         struct brcmf_bus *bus = NULL;
1259         struct brcmf_usbdev *bus_pub = NULL;
1260         struct device *dev = devinfo->dev;
1261         struct brcmf_fw_request *fwreq;
1262         int ret;
1263
1264         brcmf_dbg(USB, "Enter\n");
1265         bus_pub = brcmf_usb_attach(devinfo, BRCMF_USB_NRXQ, BRCMF_USB_NTXQ);
1266         if (!bus_pub)
1267                 return -ENODEV;
1268
1269         bus = kzalloc(sizeof(struct brcmf_bus), GFP_ATOMIC);
1270         if (!bus) {
1271                 ret = -ENOMEM;
1272                 goto fail;
1273         }
1274
1275         bus->dev = dev;
1276         bus_pub->bus = bus;
1277         bus->bus_priv.usb = bus_pub;
1278         dev_set_drvdata(dev, bus);
1279         bus->ops = &brcmf_usb_bus_ops;
1280         bus->proto_type = BRCMF_PROTO_BCDC;
1281         bus->always_use_fws_queue = true;
1282 #ifdef CONFIG_PM
1283         bus->wowl_supported = true;
1284 #endif
1285
1286         devinfo->settings = brcmf_get_module_param(bus->dev, BRCMF_BUSTYPE_USB,
1287                                                    bus_pub->devid,
1288                                                    bus_pub->chiprev);
1289         if (!devinfo->settings) {
1290                 ret = -ENOMEM;
1291                 goto fail;
1292         }
1293
1294         if (!brcmf_usb_dlneeded(devinfo)) {
1295                 ret = brcmf_alloc(devinfo->dev, devinfo->settings);
1296                 if (ret)
1297                         goto fail;
1298                 ret = brcmf_attach(devinfo->dev);
1299                 if (ret)
1300                         goto fail;
1301                 /* we are done */
1302                 complete(&devinfo->dev_init_done);
1303                 return 0;
1304         }
1305         bus->chip = bus_pub->devid;
1306         bus->chiprev = bus_pub->chiprev;
1307
1308         fwreq = brcmf_usb_prepare_fw_request(devinfo);
1309         if (!fwreq) {
1310                 ret = -ENOMEM;
1311                 goto fail;
1312         }
1313
1314         /* request firmware here */
1315         ret = brcmf_fw_get_firmwares(dev, fwreq, brcmf_usb_probe_phase2);
1316         if (ret) {
1317                 brcmf_err("firmware request failed: %d\n", ret);
1318                 kfree(fwreq);
1319                 goto fail;
1320         }
1321
1322         return 0;
1323
1324 fail:
1325         /* Release resources in reverse order */
1326         brcmf_free(devinfo->dev);
1327         kfree(bus);
1328         brcmf_usb_detach(devinfo);
1329         return ret;
1330 }
1331
1332 static void
1333 brcmf_usb_disconnect_cb(struct brcmf_usbdev_info *devinfo)
1334 {
1335         if (!devinfo)
1336                 return;
1337         brcmf_dbg(USB, "Enter, bus_pub %p\n", devinfo);
1338
1339         brcmf_detach(devinfo->dev);
1340         brcmf_free(devinfo->dev);
1341         kfree(devinfo->bus_pub.bus);
1342         brcmf_usb_detach(devinfo);
1343 }
1344
1345 static int
1346 brcmf_usb_probe(struct usb_interface *intf, const struct usb_device_id *id)
1347 {
1348         struct usb_device *usb = interface_to_usbdev(intf);
1349         struct brcmf_usbdev_info *devinfo;
1350         struct usb_interface_descriptor *desc;
1351         struct usb_endpoint_descriptor *endpoint;
1352         int ret = 0;
1353         u32 num_of_eps;
1354         u8 endpoint_num, ep;
1355
1356         brcmf_dbg(USB, "Enter 0x%04x:0x%04x\n", id->idVendor, id->idProduct);
1357
1358         devinfo = kzalloc(sizeof(*devinfo), GFP_ATOMIC);
1359         if (devinfo == NULL)
1360                 return -ENOMEM;
1361
1362         devinfo->usbdev = usb;
1363         devinfo->dev = &usb->dev;
1364         /* Init completion, to protect for disconnect while still loading.
1365          * Necessary because of the asynchronous firmware load construction
1366          */
1367         init_completion(&devinfo->dev_init_done);
1368
1369         usb_set_intfdata(intf, devinfo);
1370
1371         intf->needs_remote_wakeup = 1;
1372
1373         /* Check that the device supports only one configuration */
1374         if (usb->descriptor.bNumConfigurations != 1) {
1375                 brcmf_err("Number of configurations: %d not supported\n",
1376                           usb->descriptor.bNumConfigurations);
1377                 ret = -ENODEV;
1378                 goto fail;
1379         }
1380
1381         if ((usb->descriptor.bDeviceClass != USB_CLASS_VENDOR_SPEC) &&
1382             (usb->descriptor.bDeviceClass != USB_CLASS_MISC) &&
1383             (usb->descriptor.bDeviceClass != USB_CLASS_WIRELESS_CONTROLLER)) {
1384                 brcmf_err("Device class: 0x%x not supported\n",
1385                           usb->descriptor.bDeviceClass);
1386                 ret = -ENODEV;
1387                 goto fail;
1388         }
1389
1390         desc = &intf->cur_altsetting->desc;
1391         if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
1392             (desc->bInterfaceSubClass != 2) ||
1393             (desc->bInterfaceProtocol != 0xff)) {
1394                 brcmf_err("non WLAN interface %d: 0x%x:0x%x:0x%x\n",
1395                           desc->bInterfaceNumber, desc->bInterfaceClass,
1396                           desc->bInterfaceSubClass, desc->bInterfaceProtocol);
1397                 ret = -ENODEV;
1398                 goto fail;
1399         }
1400
1401         num_of_eps = desc->bNumEndpoints;
1402         for (ep = 0; ep < num_of_eps; ep++) {
1403                 endpoint = &intf->cur_altsetting->endpoint[ep].desc;
1404                 endpoint_num = usb_endpoint_num(endpoint);
1405                 if (!usb_endpoint_xfer_bulk(endpoint))
1406                         continue;
1407                 if (usb_endpoint_dir_in(endpoint)) {
1408                         if (!devinfo->rx_pipe)
1409                                 devinfo->rx_pipe =
1410                                         usb_rcvbulkpipe(usb, endpoint_num);
1411                 } else {
1412                         if (!devinfo->tx_pipe)
1413                                 devinfo->tx_pipe =
1414                                         usb_sndbulkpipe(usb, endpoint_num);
1415                 }
1416         }
1417         if (devinfo->rx_pipe == 0) {
1418                 brcmf_err("No RX (in) Bulk EP found\n");
1419                 ret = -ENODEV;
1420                 goto fail;
1421         }
1422         if (devinfo->tx_pipe == 0) {
1423                 brcmf_err("No TX (out) Bulk EP found\n");
1424                 ret = -ENODEV;
1425                 goto fail;
1426         }
1427
1428         devinfo->ifnum = desc->bInterfaceNumber;
1429
1430         if (usb->speed == USB_SPEED_SUPER_PLUS)
1431                 brcmf_dbg(USB, "Broadcom super speed plus USB WLAN interface detected\n");
1432         else if (usb->speed == USB_SPEED_SUPER)
1433                 brcmf_dbg(USB, "Broadcom super speed USB WLAN interface detected\n");
1434         else if (usb->speed == USB_SPEED_HIGH)
1435                 brcmf_dbg(USB, "Broadcom high speed USB WLAN interface detected\n");
1436         else
1437                 brcmf_dbg(USB, "Broadcom full speed USB WLAN interface detected\n");
1438
1439         ret = brcmf_usb_probe_cb(devinfo);
1440         if (ret)
1441                 goto fail;
1442
1443         /* Success */
1444         return 0;
1445
1446 fail:
1447         complete(&devinfo->dev_init_done);
1448         kfree(devinfo);
1449         usb_set_intfdata(intf, NULL);
1450         return ret;
1451 }
1452
1453 static void
1454 brcmf_usb_disconnect(struct usb_interface *intf)
1455 {
1456         struct brcmf_usbdev_info *devinfo;
1457
1458         brcmf_dbg(USB, "Enter\n");
1459         devinfo = (struct brcmf_usbdev_info *)usb_get_intfdata(intf);
1460
1461         if (devinfo) {
1462                 wait_for_completion(&devinfo->dev_init_done);
1463                 /* Make sure that devinfo still exists. Firmware probe routines
1464                  * may have released the device and cleared the intfdata.
1465                  */
1466                 if (!usb_get_intfdata(intf))
1467                         goto done;
1468
1469                 brcmf_usb_disconnect_cb(devinfo);
1470                 kfree(devinfo);
1471         }
1472 done:
1473         brcmf_dbg(USB, "Exit\n");
1474 }
1475
1476 /*
1477  * only need to signal the bus being down and update the state.
1478  */
1479 static int brcmf_usb_suspend(struct usb_interface *intf, pm_message_t state)
1480 {
1481         struct usb_device *usb = interface_to_usbdev(intf);
1482         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1483
1484         brcmf_dbg(USB, "Enter\n");
1485         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_SLEEP;
1486         brcmf_cancel_all_urbs(devinfo);
1487         device_set_wakeup_enable(devinfo->dev, true);
1488         return 0;
1489 }
1490
1491 /*
1492  * (re-) start the bus.
1493  */
1494 static int brcmf_usb_resume(struct usb_interface *intf)
1495 {
1496         struct usb_device *usb = interface_to_usbdev(intf);
1497         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1498
1499         brcmf_dbg(USB, "Enter\n");
1500
1501         devinfo->bus_pub.state = BRCMFMAC_USB_STATE_UP;
1502         brcmf_usb_rx_fill_all(devinfo);
1503         device_set_wakeup_enable(devinfo->dev, false);
1504         return 0;
1505 }
1506
1507 static int brcmf_usb_reset_resume(struct usb_interface *intf)
1508 {
1509         struct usb_device *usb = interface_to_usbdev(intf);
1510         struct brcmf_usbdev_info *devinfo = brcmf_usb_get_businfo(&usb->dev);
1511         struct brcmf_fw_request *fwreq;
1512         int ret;
1513
1514         brcmf_dbg(USB, "Enter\n");
1515
1516         fwreq = brcmf_usb_prepare_fw_request(devinfo);
1517         if (!fwreq)
1518                 return -ENOMEM;
1519
1520         ret = brcmf_fw_get_firmwares(&usb->dev, fwreq, brcmf_usb_probe_phase2);
1521         if (ret < 0)
1522                 kfree(fwreq);
1523
1524         return ret;
1525 }
1526
1527 #define BRCMF_USB_DEVICE(dev_id)        \
1528         { USB_DEVICE(BRCM_USB_VENDOR_ID_BROADCOM, dev_id) }
1529
1530 #define LINKSYS_USB_DEVICE(dev_id)      \
1531         { USB_DEVICE(BRCM_USB_VENDOR_ID_LINKSYS, dev_id) }
1532
1533 #define CYPRESS_USB_DEVICE(dev_id)      \
1534         { USB_DEVICE(CY_USB_VENDOR_ID_CYPRESS, dev_id) }
1535
1536 static const struct usb_device_id brcmf_usb_devid_table[] = {
1537         BRCMF_USB_DEVICE(BRCM_USB_43143_DEVICE_ID),
1538         BRCMF_USB_DEVICE(BRCM_USB_43236_DEVICE_ID),
1539         BRCMF_USB_DEVICE(BRCM_USB_43242_DEVICE_ID),
1540         BRCMF_USB_DEVICE(BRCM_USB_43569_DEVICE_ID),
1541         LINKSYS_USB_DEVICE(BRCM_USB_43235_LINKSYS_DEVICE_ID),
1542         CYPRESS_USB_DEVICE(CY_USB_4373_DEVICE_ID),
1543         { USB_DEVICE(BRCM_USB_VENDOR_ID_LG, BRCM_USB_43242_LG_DEVICE_ID) },
1544         /* special entry for device with firmware loaded and running */
1545         BRCMF_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1546         CYPRESS_USB_DEVICE(BRCM_USB_BCMFW_DEVICE_ID),
1547         { /* end: all zeroes */ }
1548 };
1549
1550 MODULE_DEVICE_TABLE(usb, brcmf_usb_devid_table);
1551
1552 static struct usb_driver brcmf_usbdrvr = {
1553         .name = KBUILD_MODNAME,
1554         .probe = brcmf_usb_probe,
1555         .disconnect = brcmf_usb_disconnect,
1556         .id_table = brcmf_usb_devid_table,
1557         .suspend = brcmf_usb_suspend,
1558         .resume = brcmf_usb_resume,
1559         .reset_resume = brcmf_usb_reset_resume,
1560         .supports_autosuspend = true,
1561         .disable_hub_initiated_lpm = 1,
1562 };
1563
1564 static int brcmf_usb_reset_device(struct device *dev, void *notused)
1565 {
1566         /* device past is the usb interface so we
1567          * need to use parent here.
1568          */
1569         brcmf_dev_reset(dev->parent);
1570         return 0;
1571 }
1572
1573 void brcmf_usb_exit(void)
1574 {
1575         struct device_driver *drv = &brcmf_usbdrvr.drvwrap.driver;
1576         int ret;
1577
1578         brcmf_dbg(USB, "Enter\n");
1579         ret = driver_for_each_device(drv, NULL, NULL,
1580                                      brcmf_usb_reset_device);
1581         if (ret)
1582                 brcmf_err("failed to reset all usb devices %d\n", ret);
1583
1584         usb_deregister(&brcmf_usbdrvr);
1585 }
1586
1587 void brcmf_usb_register(void)
1588 {
1589         int ret;
1590
1591         brcmf_dbg(USB, "Enter\n");
1592         ret = usb_register(&brcmf_usbdrvr);
1593         if (ret)
1594                 brcmf_err("usb_register failed %d\n", ret);
1595 }