drivers/net/wireless/ath/ath9k/hif_usb.c

   1 /*
   2  * Copyright (c) 2010 Atheros Communications Inc.
   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
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #include "htc.h"
  18
  19 /* identify firmware images */
  20 #define FIRMWARE_AR7010_1_1     "htc_7010.fw"
  21 #define FIRMWARE_AR9271         "htc_9271.fw"
  22
  23 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
  24 MODULE_FIRMWARE(FIRMWARE_AR9271);
  25
  26 static struct usb_device_id ath9k_hif_usb_ids[] = {
  27         { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
  28         { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
  29         { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
  30         { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
  31         { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
  32         { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
  33         { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */
  34         { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */
  35         { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */
  36         { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */
  37         { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
  38         { USB_DEVICE(0x040D, 0x3801) }, /* VIA */
  39         { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */
  40
  41         { USB_DEVICE(0x0cf3, 0x7015),
  42           .driver_info = AR9287_USB },  /* Atheros */
  43         { USB_DEVICE(0x1668, 0x1200),
  44           .driver_info = AR9287_USB },  /* Verizon */
  45
  46         { USB_DEVICE(0x0cf3, 0x7010),
  47           .driver_info = AR9280_USB },  /* Atheros */
  48         { USB_DEVICE(0x0846, 0x9018),
  49           .driver_info = AR9280_USB },  /* Netgear WNDA3200 */
  50         { USB_DEVICE(0x083A, 0xA704),
  51           .driver_info = AR9280_USB },  /* SMC Networks */
  52
  53         { USB_DEVICE(0x0cf3, 0x20ff),
  54           .driver_info = STORAGE_DEVICE },
  55
  56         { },
  57 };
  58
  59 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
  60
  61 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
  62
  63 static void hif_usb_regout_cb(struct urb *urb)
  64 {
  65         struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
  66
  67         switch (urb->status) {
  68         case 0:
  69                 break;
  70         case -ENOENT:
  71         case -ECONNRESET:
  72         case -ENODEV:
  73         case -ESHUTDOWN:
  74                 goto free;
  75         default:
  76                 break;
  77         }
  78
  79         if (cmd) {
  80                 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
  81                                           cmd->skb, 1);
  82                 kfree(cmd);
  83         }
  84
  85         return;
  86 free:
  87         kfree_skb(cmd->skb);
  88         kfree(cmd);
  89 }
  90
  91 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
  92                                struct sk_buff *skb)
  93 {
  94         struct urb *urb;
  95         struct cmd_buf *cmd;
  96         int ret = 0;
  97
  98         urb = usb_alloc_urb(0, GFP_KERNEL);
  99         if (urb == NULL)
 100                 return -ENOMEM;
 101
 102         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 103         if (cmd == NULL) {
 104                 usb_free_urb(urb);
 105                 return -ENOMEM;
 106         }
 107
 108         cmd->skb = skb;
 109         cmd->hif_dev = hif_dev;
 110
 111         usb_fill_bulk_urb(urb, hif_dev->udev,
 112                          usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE),
 113                          skb->data, skb->len,
 114                          hif_usb_regout_cb, cmd);
 115
 116         usb_anchor_urb(urb, &hif_dev->regout_submitted);
 117         ret = usb_submit_urb(urb, GFP_KERNEL);
 118         if (ret) {
 119                 usb_unanchor_urb(urb);
 120                 kfree(cmd);
 121         }
 122         usb_free_urb(urb);
 123
 124         return ret;
 125 }
 126
 127 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
 128                                          struct sk_buff_head *list)
 129 {
 130         struct sk_buff *skb;
 131
 132         while ((skb = __skb_dequeue(list)) != NULL) {
 133                 dev_kfree_skb_any(skb);
 134         }
 135 }
 136
 137 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev,
 138                                             struct sk_buff_head *queue,
 139                                             bool txok)
 140 {
 141         struct sk_buff *skb;
 142
 143         while ((skb = __skb_dequeue(queue)) != NULL) {
 144                 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
 145                                           skb, txok);
 146                 (txok) ? TX_STAT_INC(skb_success) : TX_STAT_INC(skb_failed);
 147         }
 148 }
 149
 150 static void hif_usb_tx_cb(struct urb *urb)
 151 {
 152         struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
 153         struct hif_device_usb *hif_dev;
 154         bool txok = true;
 155
 156         if (!tx_buf || !tx_buf->hif_dev)
 157                 return;
 158
 159         hif_dev = tx_buf->hif_dev;
 160
 161         switch (urb->status) {
 162         case 0:
 163                 break;
 164         case -ENOENT:
 165         case -ECONNRESET:
 166         case -ENODEV:
 167         case -ESHUTDOWN:
 168                 txok = false;
 169
 170                 /*
 171                  * If the URBs are being flushed, no need to add this
 172                  * URB to the free list.
 173                  */
 174                 spin_lock(&hif_dev->tx.tx_lock);
 175                 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) {
 176                         spin_unlock(&hif_dev->tx.tx_lock);
 177                         ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
 178                         return;
 179                 }
 180                 spin_unlock(&hif_dev->tx.tx_lock);
 181
 182                 break;
 183         default:
 184                 txok = false;
 185                 break;
 186         }
 187
 188         ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok);
 189
 190         /* Re-initialize the SKB queue */
 191         tx_buf->len = tx_buf->offset = 0;
 192         __skb_queue_head_init(&tx_buf->skb_queue);
 193
 194         /* Add this TX buffer to the free list */
 195         spin_lock(&hif_dev->tx.tx_lock);
 196         list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 197         hif_dev->tx.tx_buf_cnt++;
 198         if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
 199                 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
 200         TX_STAT_INC(buf_completed);
 201         spin_unlock(&hif_dev->tx.tx_lock);
 202 }
 203
 204 /* TX lock has to be taken */
 205 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
 206 {
 207         struct tx_buf *tx_buf = NULL;
 208         struct sk_buff *nskb = NULL;
 209         int ret = 0, i;
 210         u16 tx_skb_cnt = 0;
 211         u8 *buf;
 212         __le16 *hdr;
 213
 214         if (hif_dev->tx.tx_skb_cnt == 0)
 215                 return 0;
 216
 217         /* Check if a free TX buffer is available */
 218         if (list_empty(&hif_dev->tx.tx_buf))
 219                 return 0;
 220
 221         tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
 222         list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
 223         hif_dev->tx.tx_buf_cnt--;
 224
 225         tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
 226
 227         for (i = 0; i < tx_skb_cnt; i++) {
 228                 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
 229
 230                 /* Should never be NULL */
 231                 BUG_ON(!nskb);
 232
 233                 hif_dev->tx.tx_skb_cnt--;
 234
 235                 buf = tx_buf->buf;
 236                 buf += tx_buf->offset;
 237                 hdr = (__le16 *)buf;
 238                 *hdr++ = cpu_to_le16(nskb->len);
 239                 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG);
 240                 buf += 4;
 241                 memcpy(buf, nskb->data, nskb->len);
 242                 tx_buf->len = nskb->len + 4;
 243
 244                 if (i < (tx_skb_cnt - 1))
 245                         tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
 246
 247                 if (i == (tx_skb_cnt - 1))
 248                         tx_buf->len += tx_buf->offset;
 249
 250                 __skb_queue_tail(&tx_buf->skb_queue, nskb);
 251                 TX_STAT_INC(skb_queued);
 252         }
 253
 254         usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
 255                           usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
 256                           tx_buf->buf, tx_buf->len,
 257                           hif_usb_tx_cb, tx_buf);
 258
 259         ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
 260         if (ret) {
 261                 tx_buf->len = tx_buf->offset = 0;
 262                 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false);
 263                 __skb_queue_head_init(&tx_buf->skb_queue);
 264                 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 265                 hif_dev->tx.tx_buf_cnt++;
 266         }
 267
 268         if (!ret)
 269                 TX_STAT_INC(buf_queued);
 270
 271         return ret;
 272 }
 273
 274 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb)
 275 {
 276         struct ath9k_htc_tx_ctl *tx_ctl;
 277         unsigned long flags;
 278
 279         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 280
 281         if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
 282                 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 283                 return -ENODEV;
 284         }
 285
 286         /* Check if the max queue count has been reached */
 287         if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
 288                 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 289                 return -ENOMEM;
 290         }
 291
 292         __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
 293         hif_dev->tx.tx_skb_cnt++;
 294
 295         tx_ctl = HTC_SKB_CB(skb);
 296
 297         /* Send normal/mgmt/beacon frames immediately */
 298         if (tx_ctl->type != ATH9K_HTC_AMPDU)
 299                 __hif_usb_tx(hif_dev);
 300
 301         /* Check if AMPDUs have to be sent immediately */
 302         if ((tx_ctl->type == ATH9K_HTC_AMPDU) &&
 303             (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
 304             (hif_dev->tx.tx_skb_cnt < 2)) {
 305                 __hif_usb_tx(hif_dev);
 306         }
 307
 308         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 309
 310         return 0;
 311 }
 312
 313 static void hif_usb_start(void *hif_handle, u8 pipe_id)
 314 {
 315         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 316         unsigned long flags;
 317
 318         hif_dev->flags |= HIF_USB_START;
 319
 320         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 321         hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
 322         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 323 }
 324
 325 static void hif_usb_stop(void *hif_handle, u8 pipe_id)
 326 {
 327         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 328         struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
 329         unsigned long flags;
 330
 331         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 332         ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false);
 333         hif_dev->tx.tx_skb_cnt = 0;
 334         hif_dev->tx.flags |= HIF_USB_TX_STOP;
 335         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 336
 337         /* The pending URBs have to be canceled. */
 338         list_for_each_entry_safe(tx_buf, tx_buf_tmp,
 339                                  &hif_dev->tx.tx_pending, list) {
 340                 usb_kill_urb(tx_buf->urb);
 341         }
 342 }
 343
 344 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb)
 345 {
 346         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 347         int ret = 0;
 348
 349         switch (pipe_id) {
 350         case USB_WLAN_TX_PIPE:
 351                 ret = hif_usb_send_tx(hif_dev, skb);
 352                 break;
 353         case USB_REG_OUT_PIPE:
 354                 ret = hif_usb_send_regout(hif_dev, skb);
 355                 break;
 356         default:
 357                 dev_err(&hif_dev->udev->dev,
 358                         "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
 359                 ret = -EINVAL;
 360                 break;
 361         }
 362
 363         return ret;
 364 }
 365
 366 static struct ath9k_htc_hif hif_usb = {
 367         .transport = ATH9K_HIF_USB,
 368         .name = "ath9k_hif_usb",
 369
 370         .control_ul_pipe = USB_REG_OUT_PIPE,
 371         .control_dl_pipe = USB_REG_IN_PIPE,
 372
 373         .start = hif_usb_start,
 374         .stop = hif_usb_stop,
 375         .send = hif_usb_send,
 376 };
 377
 378 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
 379                                     struct sk_buff *skb)
 380 {
 381         struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
 382         int index = 0, i = 0, len = skb->len;
 383         int rx_remain_len, rx_pkt_len;
 384         u16 pool_index = 0;
 385         u8 *ptr;
 386
 387         spin_lock(&hif_dev->rx_lock);
 388
 389         rx_remain_len = hif_dev->rx_remain_len;
 390         rx_pkt_len = hif_dev->rx_transfer_len;
 391
 392         if (rx_remain_len != 0) {
 393                 struct sk_buff *remain_skb = hif_dev->remain_skb;
 394
 395                 if (remain_skb) {
 396                         ptr = (u8 *) remain_skb->data;
 397
 398                         index = rx_remain_len;
 399                         rx_remain_len -= hif_dev->rx_pad_len;
 400                         ptr += rx_pkt_len;
 401
 402                         memcpy(ptr, skb->data, rx_remain_len);
 403
 404                         rx_pkt_len += rx_remain_len;
 405                         hif_dev->rx_remain_len = 0;
 406                         skb_put(remain_skb, rx_pkt_len);
 407
 408                         skb_pool[pool_index++] = remain_skb;
 409
 410                 } else {
 411                         index = rx_remain_len;
 412                 }
 413         }
 414
 415         spin_unlock(&hif_dev->rx_lock);
 416
 417         while (index < len) {
 418                 u16 pkt_len;
 419                 u16 pkt_tag;
 420                 u16 pad_len;
 421                 int chk_idx;
 422
 423                 ptr = (u8 *) skb->data;
 424
 425                 pkt_len = ptr[index] + (ptr[index+1] << 8);
 426                 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
 427
 428                 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) {
 429                         RX_STAT_INC(skb_dropped);
 430                         return;
 431                 }
 432
 433                 pad_len = 4 - (pkt_len & 0x3);
 434                 if (pad_len == 4)
 435                         pad_len = 0;
 436
 437                 chk_idx = index;
 438                 index = index + 4 + pkt_len + pad_len;
 439
 440                 if (index > MAX_RX_BUF_SIZE) {
 441                         spin_lock(&hif_dev->rx_lock);
 442                         hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
 443                         hif_dev->rx_transfer_len =
 444                                 MAX_RX_BUF_SIZE - chk_idx - 4;
 445                         hif_dev->rx_pad_len = pad_len;
 446
 447                         nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
 448                         if (!nskb) {
 449                                 dev_err(&hif_dev->udev->dev,
 450                                         "ath9k_htc: RX memory allocation error\n");
 451                                 spin_unlock(&hif_dev->rx_lock);
 452                                 goto err;
 453                         }
 454                         skb_reserve(nskb, 32);
 455                         RX_STAT_INC(skb_allocated);
 456
 457                         memcpy(nskb->data, &(skb->data[chk_idx+4]),
 458                                hif_dev->rx_transfer_len);
 459
 460                         /* Record the buffer pointer */
 461                         hif_dev->remain_skb = nskb;
 462                         spin_unlock(&hif_dev->rx_lock);
 463                 } else {
 464                         nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
 465                         if (!nskb) {
 466                                 dev_err(&hif_dev->udev->dev,
 467                                         "ath9k_htc: RX memory allocation error\n");
 468                                 goto err;
 469                         }
 470                         skb_reserve(nskb, 32);
 471                         RX_STAT_INC(skb_allocated);
 472
 473                         memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
 474                         skb_put(nskb, pkt_len);
 475                         skb_pool[pool_index++] = nskb;
 476                 }
 477         }
 478
 479 err:
 480         for (i = 0; i < pool_index; i++) {
 481                 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
 482                                  skb_pool[i]->len, USB_WLAN_RX_PIPE);
 483                 RX_STAT_INC(skb_completed);
 484         }
 485 }
 486
 487 static void ath9k_hif_usb_rx_cb(struct urb *urb)
 488 {
 489         struct sk_buff *skb = (struct sk_buff *) urb->context;
 490         struct hif_device_usb *hif_dev =
 491                 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
 492         int ret;
 493
 494         if (!skb)
 495                 return;
 496
 497         if (!hif_dev)
 498                 goto free;
 499
 500         switch (urb->status) {
 501         case 0:
 502                 break;
 503         case -ENOENT:
 504         case -ECONNRESET:
 505         case -ENODEV:
 506         case -ESHUTDOWN:
 507                 goto free;
 508         default:
 509                 goto resubmit;
 510         }
 511
 512         if (likely(urb->actual_length != 0)) {
 513                 skb_put(skb, urb->actual_length);
 514                 ath9k_hif_usb_rx_stream(hif_dev, skb);
 515         }
 516
 517 resubmit:
 518         skb_reset_tail_pointer(skb);
 519         skb_trim(skb, 0);
 520
 521         usb_anchor_urb(urb, &hif_dev->rx_submitted);
 522         ret = usb_submit_urb(urb, GFP_ATOMIC);
 523         if (ret) {
 524                 usb_unanchor_urb(urb);
 525                 goto free;
 526         }
 527
 528         return;
 529 free:
 530         kfree_skb(skb);
 531 }
 532
 533 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
 534 {
 535         struct sk_buff *skb = (struct sk_buff *) urb->context;
 536         struct sk_buff *nskb;
 537         struct hif_device_usb *hif_dev =
 538                 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
 539         int ret;
 540
 541         if (!skb)
 542                 return;
 543
 544         if (!hif_dev)
 545                 goto free;
 546
 547         switch (urb->status) {
 548         case 0:
 549                 break;
 550         case -ENOENT:
 551         case -ECONNRESET:
 552         case -ENODEV:
 553         case -ESHUTDOWN:
 554                 goto free;
 555         default:
 556                 skb_reset_tail_pointer(skb);
 557                 skb_trim(skb, 0);
 558
 559                 goto resubmit;
 560         }
 561
 562         if (likely(urb->actual_length != 0)) {
 563                 skb_put(skb, urb->actual_length);
 564
 565                 /* Process the command first */
 566                 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
 567                                  skb->len, USB_REG_IN_PIPE);
 568
 569
 570                 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
 571                 if (!nskb) {
 572                         dev_err(&hif_dev->udev->dev,
 573                                 "ath9k_htc: REG_IN memory allocation failure\n");
 574                         urb->context = NULL;
 575                         return;
 576                 }
 577
 578                 usb_fill_bulk_urb(urb, hif_dev->udev,
 579                                  usb_rcvbulkpipe(hif_dev->udev,
 580                                                  USB_REG_IN_PIPE),
 581                                  nskb->data, MAX_REG_IN_BUF_SIZE,
 582                                  ath9k_hif_usb_reg_in_cb, nskb);
 583         }
 584
 585 resubmit:
 586         usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
 587         ret = usb_submit_urb(urb, GFP_ATOMIC);
 588         if (ret) {
 589                 usb_unanchor_urb(urb);
 590                 goto free;
 591         }
 592
 593         return;
 594 free:
 595         kfree_skb(skb);
 596         urb->context = NULL;
 597 }
 598
 599 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
 600 {
 601         struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
 602         unsigned long flags;
 603
 604         list_for_each_entry_safe(tx_buf, tx_buf_tmp,
 605                                  &hif_dev->tx.tx_buf, list) {
 606                 usb_kill_urb(tx_buf->urb);
 607                 list_del(&tx_buf->list);
 608                 usb_free_urb(tx_buf->urb);
 609                 kfree(tx_buf->buf);
 610                 kfree(tx_buf);
 611         }
 612
 613         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 614         hif_dev->tx.flags |= HIF_USB_TX_FLUSH;
 615         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 616
 617         list_for_each_entry_safe(tx_buf, tx_buf_tmp,
 618                                  &hif_dev->tx.tx_pending, list) {
 619                 usb_kill_urb(tx_buf->urb);
 620                 list_del(&tx_buf->list);
 621                 usb_free_urb(tx_buf->urb);
 622                 kfree(tx_buf->buf);
 623                 kfree(tx_buf);
 624         }
 625 }
 626
 627 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
 628 {
 629         struct tx_buf *tx_buf;
 630         int i;
 631
 632         INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
 633         INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
 634         spin_lock_init(&hif_dev->tx.tx_lock);
 635         __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
 636
 637         for (i = 0; i < MAX_TX_URB_NUM; i++) {
 638                 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
 639                 if (!tx_buf)
 640                         goto err;
 641
 642                 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
 643                 if (!tx_buf->buf)
 644                         goto err;
 645
 646                 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
 647                 if (!tx_buf->urb)
 648                         goto err;
 649
 650                 tx_buf->hif_dev = hif_dev;
 651                 __skb_queue_head_init(&tx_buf->skb_queue);
 652
 653                 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 654         }
 655
 656         hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
 657
 658         return 0;
 659 err:
 660         if (tx_buf) {
 661                 kfree(tx_buf->buf);
 662                 kfree(tx_buf);
 663         }
 664         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 665         return -ENOMEM;
 666 }
 667
 668 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
 669 {
 670         usb_kill_anchored_urbs(&hif_dev->rx_submitted);
 671 }
 672
 673 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
 674 {
 675         struct urb *urb = NULL;
 676         struct sk_buff *skb = NULL;
 677         int i, ret;
 678
 679         init_usb_anchor(&hif_dev->rx_submitted);
 680         spin_lock_init(&hif_dev->rx_lock);
 681
 682         for (i = 0; i < MAX_RX_URB_NUM; i++) {
 683
 684                 /* Allocate URB */
 685                 urb = usb_alloc_urb(0, GFP_KERNEL);
 686                 if (urb == NULL) {
 687                         ret = -ENOMEM;
 688                         goto err_urb;
 689                 }
 690
 691                 /* Allocate buffer */
 692                 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
 693                 if (!skb) {
 694                         ret = -ENOMEM;
 695                         goto err_skb;
 696                 }
 697
 698                 usb_fill_bulk_urb(urb, hif_dev->udev,
 699                                   usb_rcvbulkpipe(hif_dev->udev,
 700                                                   USB_WLAN_RX_PIPE),
 701                                   skb->data, MAX_RX_BUF_SIZE,
 702                                   ath9k_hif_usb_rx_cb, skb);
 703
 704                 /* Anchor URB */
 705                 usb_anchor_urb(urb, &hif_dev->rx_submitted);
 706
 707                 /* Submit URB */
 708                 ret = usb_submit_urb(urb, GFP_KERNEL);
 709                 if (ret) {
 710                         usb_unanchor_urb(urb);
 711                         goto err_submit;
 712                 }
 713
 714                 /*
 715                  * Drop reference count.
 716                  * This ensures that the URB is freed when killing them.
 717                  */
 718                 usb_free_urb(urb);
 719         }
 720
 721         return 0;
 722
 723 err_submit:
 724         kfree_skb(skb);
 725 err_skb:
 726         usb_free_urb(urb);
 727 err_urb:
 728         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 729         return ret;
 730 }
 731
 732 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev)
 733 {
 734         usb_kill_anchored_urbs(&hif_dev->reg_in_submitted);
 735 }
 736
 737 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev)
 738 {
 739         struct urb *urb = NULL;
 740         struct sk_buff *skb = NULL;
 741         int i, ret;
 742
 743         init_usb_anchor(&hif_dev->reg_in_submitted);
 744
 745         for (i = 0; i < MAX_REG_IN_URB_NUM; i++) {
 746
 747                 /* Allocate URB */
 748                 urb = usb_alloc_urb(0, GFP_KERNEL);
 749                 if (urb == NULL) {
 750                         ret = -ENOMEM;
 751                         goto err_urb;
 752                 }
 753
 754                 /* Allocate buffer */
 755                 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
 756                 if (!skb) {
 757                         ret = -ENOMEM;
 758                         goto err_skb;
 759                 }
 760
 761                 usb_fill_bulk_urb(urb, hif_dev->udev,
 762                                   usb_rcvbulkpipe(hif_dev->udev,
 763                                                   USB_REG_IN_PIPE),
 764                                   skb->data, MAX_REG_IN_BUF_SIZE,
 765                                   ath9k_hif_usb_reg_in_cb, skb);
 766
 767                 /* Anchor URB */
 768                 usb_anchor_urb(urb, &hif_dev->reg_in_submitted);
 769
 770                 /* Submit URB */
 771                 ret = usb_submit_urb(urb, GFP_KERNEL);
 772                 if (ret) {
 773                         usb_unanchor_urb(urb);
 774                         goto err_submit;
 775                 }
 776
 777                 /*
 778                  * Drop reference count.
 779                  * This ensures that the URB is freed when killing them.
 780                  */
 781                 usb_free_urb(urb);
 782         }
 783
 784         return 0;
 785
 786 err_submit:
 787         kfree_skb(skb);
 788 err_skb:
 789         usb_free_urb(urb);
 790 err_urb:
 791         ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
 792         return ret;
 793 }
 794
 795 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
 796 {
 797         /* Register Write */
 798         init_usb_anchor(&hif_dev->regout_submitted);
 799
 800         /* TX */
 801         if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
 802                 goto err;
 803
 804         /* RX */
 805         if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
 806                 goto err_rx;
 807
 808         /* Register Read */
 809         if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0)
 810                 goto err_reg;
 811
 812         return 0;
 813 err_reg:
 814         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 815 err_rx:
 816         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 817 err:
 818         return -ENOMEM;
 819 }
 820
 821 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
 822 {
 823         usb_kill_anchored_urbs(&hif_dev->regout_submitted);
 824         ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev);
 825         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 826         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 827 }
 828
 829 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev,
 830                                      u32 drv_info)
 831 {
 832         int transfer, err;
 833         const void *data = hif_dev->firmware->data;
 834         size_t len = hif_dev->firmware->size;
 835         u32 addr = AR9271_FIRMWARE;
 836         u8 *buf = kzalloc(4096, GFP_KERNEL);
 837         u32 firm_offset;
 838
 839         if (!buf)
 840                 return -ENOMEM;
 841
 842         while (len) {
 843                 transfer = min_t(int, len, 4096);
 844                 memcpy(buf, data, transfer);
 845
 846                 err = usb_control_msg(hif_dev->udev,
 847                                       usb_sndctrlpipe(hif_dev->udev, 0),
 848                                       FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
 849                                       addr >> 8, 0, buf, transfer, HZ);
 850                 if (err < 0) {
 851                         kfree(buf);
 852                         return err;
 853                 }
 854
 855                 len -= transfer;
 856                 data += transfer;
 857                 addr += transfer;
 858         }
 859         kfree(buf);
 860
 861         if (IS_AR7010_DEVICE(drv_info))
 862                 firm_offset = AR7010_FIRMWARE_TEXT;
 863         else
 864                 firm_offset = AR9271_FIRMWARE_TEXT;
 865
 866         /*
 867          * Issue FW download complete command to firmware.
 868          */
 869         err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
 870                               FIRMWARE_DOWNLOAD_COMP,
 871                               0x40 | USB_DIR_OUT,
 872                               firm_offset >> 8, 0, NULL, 0, HZ);
 873         if (err)
 874                 return -EIO;
 875
 876         dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
 877                  hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
 878
 879         return 0;
 880 }
 881
 882 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info)
 883 {
 884         int ret, idx;
 885         struct usb_host_interface *alt = &hif_dev->interface->altsetting[0];
 886         struct usb_endpoint_descriptor *endp;
 887
 888         /* Request firmware */
 889         ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
 890                                &hif_dev->udev->dev);
 891         if (ret) {
 892                 dev_err(&hif_dev->udev->dev,
 893                         "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
 894                 goto err_fw_req;
 895         }
 896
 897         /* Download firmware */
 898         ret = ath9k_hif_usb_download_fw(hif_dev, drv_info);
 899         if (ret) {
 900                 dev_err(&hif_dev->udev->dev,
 901                         "ath9k_htc: Firmware - %s download failed\n",
 902                         hif_dev->fw_name);
 903                 goto err_fw_download;
 904         }
 905
 906         /* On downloading the firmware to the target, the USB descriptor of EP4
 907          * is 'patched' to change the type of the endpoint to Bulk. This will
 908          * bring down CPU usage during the scan period.
 909          */
 910         for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) {
 911                 endp = &alt->endpoint[idx].desc;
 912                 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
 913                                 == USB_ENDPOINT_XFER_INT) {
 914                         endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK;
 915                         endp->bmAttributes |= USB_ENDPOINT_XFER_BULK;
 916                         endp->bInterval = 0;
 917                 }
 918         }
 919
 920         /* Alloc URBs */
 921         ret = ath9k_hif_usb_alloc_urbs(hif_dev);
 922         if (ret) {
 923                 dev_err(&hif_dev->udev->dev,
 924                         "ath9k_htc: Unable to allocate URBs\n");
 925                 goto err_fw_download;
 926         }
 927
 928         return 0;
 929
 930 err_fw_download:
 931         release_firmware(hif_dev->firmware);
 932 err_fw_req:
 933         hif_dev->firmware = NULL;
 934         return ret;
 935 }
 936
 937 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
 938 {
 939         ath9k_hif_usb_dealloc_urbs(hif_dev);
 940         if (hif_dev->firmware)
 941                 release_firmware(hif_dev->firmware);
 942 }
 943
 944 /*
 945  * An exact copy of the function from zd1211rw.
 946  */
 947 static int send_eject_command(struct usb_interface *interface)
 948 {
 949         struct usb_device *udev = interface_to_usbdev(interface);
 950         struct usb_host_interface *iface_desc = &interface->altsetting[0];
 951         struct usb_endpoint_descriptor *endpoint;
 952         unsigned char *cmd;
 953         u8 bulk_out_ep;
 954         int r;
 955
 956         /* Find bulk out endpoint */
 957         for (r = 1; r >= 0; r--) {
 958                 endpoint = &iface_desc->endpoint[r].desc;
 959                 if (usb_endpoint_dir_out(endpoint) &&
 960                     usb_endpoint_xfer_bulk(endpoint)) {
 961                         bulk_out_ep = endpoint->bEndpointAddress;
 962                         break;
 963                 }
 964         }
 965         if (r == -1) {
 966                 dev_err(&udev->dev,
 967                         "ath9k_htc: Could not find bulk out endpoint\n");
 968                 return -ENODEV;
 969         }
 970
 971         cmd = kzalloc(31, GFP_KERNEL);
 972         if (cmd == NULL)
 973                 return -ENODEV;
 974
 975         /* USB bulk command block */
 976         cmd[0] = 0x55;  /* bulk command signature */
 977         cmd[1] = 0x53;  /* bulk command signature */
 978         cmd[2] = 0x42;  /* bulk command signature */
 979         cmd[3] = 0x43;  /* bulk command signature */
 980         cmd[14] = 6;    /* command length */
 981
 982         cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */
 983         cmd[19] = 0x2;  /* eject disc */
 984
 985         dev_info(&udev->dev, "Ejecting storage device...\n");
 986         r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep),
 987                 cmd, 31, NULL, 2000);
 988         kfree(cmd);
 989         if (r)
 990                 return r;
 991
 992         /* At this point, the device disconnects and reconnects with the real
 993          * ID numbers. */
 994
 995         usb_set_intfdata(interface, NULL);
 996         return 0;
 997 }
 998
 999 static int ath9k_hif_usb_probe(struct usb_interface *interface,
1000                                const struct usb_device_id *id)
1001 {
1002         struct usb_device *udev = interface_to_usbdev(interface);
1003         struct hif_device_usb *hif_dev;
1004         int ret = 0;
1005
1006         if (id->driver_info == STORAGE_DEVICE)
1007                 return send_eject_command(interface);
1008
1009         hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
1010         if (!hif_dev) {
1011                 ret = -ENOMEM;
1012                 goto err_alloc;
1013         }
1014
1015         usb_get_dev(udev);
1016         hif_dev->udev = udev;
1017         hif_dev->interface = interface;
1018         hif_dev->device_id = id->idProduct;
1019 #ifdef CONFIG_PM
1020         udev->reset_resume = 1;
1021 #endif
1022         usb_set_intfdata(interface, hif_dev);
1023
1024         hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
1025                                                  &hif_dev->udev->dev);
1026         if (hif_dev->htc_handle == NULL) {
1027                 ret = -ENOMEM;
1028                 goto err_htc_hw_alloc;
1029         }
1030
1031         /* Find out which firmware to load */
1032
1033         if (IS_AR7010_DEVICE(id->driver_info))
1034                 hif_dev->fw_name = FIRMWARE_AR7010_1_1;
1035         else
1036                 hif_dev->fw_name = FIRMWARE_AR9271;
1037
1038         ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info);
1039         if (ret) {
1040                 ret = -EINVAL;
1041                 goto err_hif_init_usb;
1042         }
1043
1044         ret = ath9k_htc_hw_init(hif_dev->htc_handle,
1045                                 &hif_dev->udev->dev, hif_dev->device_id,
1046                                 hif_dev->udev->product, id->driver_info);
1047         if (ret) {
1048                 ret = -EINVAL;
1049                 goto err_htc_hw_init;
1050         }
1051
1052         dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
1053
1054         return 0;
1055
1056 err_htc_hw_init:
1057         ath9k_hif_usb_dev_deinit(hif_dev);
1058 err_hif_init_usb:
1059         ath9k_htc_hw_free(hif_dev->htc_handle);
1060 err_htc_hw_alloc:
1061         usb_set_intfdata(interface, NULL);
1062         kfree(hif_dev);
1063         usb_put_dev(udev);
1064 err_alloc:
1065         return ret;
1066 }
1067
1068 static void ath9k_hif_usb_reboot(struct usb_device *udev)
1069 {
1070         u32 reboot_cmd = 0xffffffff;
1071         void *buf;
1072         int ret;
1073
1074         buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
1075         if (!buf)
1076                 return;
1077
1078         ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
1079                            buf, 4, NULL, HZ);
1080         if (ret)
1081                 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
1082
1083         kfree(buf);
1084 }
1085
1086 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
1087 {
1088         struct usb_device *udev = interface_to_usbdev(interface);
1089         struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1090         bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false;
1091
1092         if (!hif_dev)
1093                 return;
1094
1095         ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged);
1096         ath9k_htc_hw_free(hif_dev->htc_handle);
1097         ath9k_hif_usb_dev_deinit(hif_dev);
1098         usb_set_intfdata(interface, NULL);
1099
1100         if (!unplugged && (hif_dev->flags & HIF_USB_START))
1101                 ath9k_hif_usb_reboot(udev);
1102
1103         kfree(hif_dev);
1104         dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
1105         usb_put_dev(udev);
1106 }
1107
1108 #ifdef CONFIG_PM
1109 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
1110                                  pm_message_t message)
1111 {
1112         struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1113
1114         /*
1115          * The device has to be set to FULLSLEEP mode in case no
1116          * interface is up.
1117          */
1118         if (!(hif_dev->flags & HIF_USB_START))
1119                 ath9k_htc_suspend(hif_dev->htc_handle);
1120
1121         ath9k_hif_usb_dealloc_urbs(hif_dev);
1122
1123         return 0;
1124 }
1125
1126 static int ath9k_hif_usb_resume(struct usb_interface *interface)
1127 {
1128         struct hif_device_usb *hif_dev = usb_get_intfdata(interface);
1129         struct htc_target *htc_handle = hif_dev->htc_handle;
1130         int ret;
1131
1132         ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1133         if (ret)
1134                 return ret;
1135
1136         if (hif_dev->firmware) {
1137                 ret = ath9k_hif_usb_download_fw(hif_dev,
1138                                 htc_handle->drv_priv->ah->hw_version.usbdev);
1139                 if (ret)
1140                         goto fail_resume;
1141         } else {
1142                 ath9k_hif_usb_dealloc_urbs(hif_dev);
1143                 return -EIO;
1144         }
1145
1146         mdelay(100);
1147
1148         ret = ath9k_htc_resume(htc_handle);
1149
1150         if (ret)
1151                 goto fail_resume;
1152
1153         return 0;
1154
1155 fail_resume:
1156         ath9k_hif_usb_dealloc_urbs(hif_dev);
1157
1158         return ret;
1159 }
1160 #endif
1161
1162 static struct usb_driver ath9k_hif_usb_driver = {
1163         .name = "ath9k_hif_usb",
1164         .probe = ath9k_hif_usb_probe,
1165         .disconnect = ath9k_hif_usb_disconnect,
1166 #ifdef CONFIG_PM
1167         .suspend = ath9k_hif_usb_suspend,
1168         .resume = ath9k_hif_usb_resume,
1169         .reset_resume = ath9k_hif_usb_resume,
1170 #endif
1171         .id_table = ath9k_hif_usb_ids,
1172         .soft_unbind = 1,
1173 };
1174
1175 int ath9k_hif_usb_init(void)
1176 {
1177         return usb_register(&ath9k_hif_usb_driver);
1178 }
1179
1180 void ath9k_hif_usb_exit(void)
1181 {
1182         usb_deregister(&ath9k_hif_usb_driver);
1183 }