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         "ar7010.fw"
  21 #define FIRMWARE_AR7010_1_1     "ar7010_1_1.fw"
  22 #define FIRMWARE_AR9271         "ar9271.fw"
  23
  24 MODULE_FIRMWARE(FIRMWARE_AR7010);
  25 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1);
  26 MODULE_FIRMWARE(FIRMWARE_AR9271);
  27
  28 static struct usb_device_id ath9k_hif_usb_ids[] = {
  29         { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */
  30         { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */
  31         { USB_DEVICE(0x0cf3, 0x7010) }, /* Atheros */
  32         { USB_DEVICE(0x0cf3, 0x7015) }, /* Atheros */
  33         { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */
  34         { USB_DEVICE(0x0846, 0x9018) }, /* Netgear WNDA3200 */
  35         { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */
  36         { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */
  37         { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */
  38         { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */
  39         { USB_DEVICE(0x083A, 0xA704) }, /* SMC Networks */
  40         { },
  41 };
  42
  43 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids);
  44
  45 static int __hif_usb_tx(struct hif_device_usb *hif_dev);
  46
  47 static void hif_usb_regout_cb(struct urb *urb)
  48 {
  49         struct cmd_buf *cmd = (struct cmd_buf *)urb->context;
  50
  51         switch (urb->status) {
  52         case 0:
  53                 break;
  54         case -ENOENT:
  55         case -ECONNRESET:
  56         case -ENODEV:
  57         case -ESHUTDOWN:
  58                 goto free;
  59         default:
  60                 break;
  61         }
  62
  63         if (cmd) {
  64                 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle,
  65                                           cmd->skb, 1);
  66                 kfree(cmd);
  67         }
  68
  69         return;
  70 free:
  71         kfree_skb(cmd->skb);
  72         kfree(cmd);
  73 }
  74
  75 static int hif_usb_send_regout(struct hif_device_usb *hif_dev,
  76                                struct sk_buff *skb)
  77 {
  78         struct urb *urb;
  79         struct cmd_buf *cmd;
  80         int ret = 0;
  81
  82         urb = usb_alloc_urb(0, GFP_KERNEL);
  83         if (urb == NULL)
  84                 return -ENOMEM;
  85
  86         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
  87         if (cmd == NULL) {
  88                 usb_free_urb(urb);
  89                 return -ENOMEM;
  90         }
  91
  92         cmd->skb = skb;
  93         cmd->hif_dev = hif_dev;
  94
  95         usb_fill_int_urb(urb, hif_dev->udev,
  96                          usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE),
  97                          skb->data, skb->len,
  98                          hif_usb_regout_cb, cmd, 1);
  99
 100         usb_anchor_urb(urb, &hif_dev->regout_submitted);
 101         ret = usb_submit_urb(urb, GFP_KERNEL);
 102         if (ret) {
 103                 usb_unanchor_urb(urb);
 104                 kfree(cmd);
 105         }
 106         usb_free_urb(urb);
 107
 108         return ret;
 109 }
 110
 111 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev,
 112                                          struct sk_buff_head *list)
 113 {
 114         struct sk_buff *skb;
 115
 116         while ((skb = __skb_dequeue(list)) != NULL) {
 117                 dev_kfree_skb_any(skb);
 118                 TX_STAT_INC(skb_dropped);
 119         }
 120 }
 121
 122 static void hif_usb_tx_cb(struct urb *urb)
 123 {
 124         struct tx_buf *tx_buf = (struct tx_buf *) urb->context;
 125         struct hif_device_usb *hif_dev;
 126         struct sk_buff *skb;
 127
 128         if (!tx_buf || !tx_buf->hif_dev)
 129                 return;
 130
 131         hif_dev = tx_buf->hif_dev;
 132
 133         switch (urb->status) {
 134         case 0:
 135                 break;
 136         case -ENOENT:
 137         case -ECONNRESET:
 138         case -ENODEV:
 139         case -ESHUTDOWN:
 140                 /*
 141                  * The URB has been killed, free the SKBs
 142                  * and return.
 143                  */
 144                 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
 145                 return;
 146         default:
 147                 break;
 148         }
 149
 150         /* Check if TX has been stopped */
 151         spin_lock(&hif_dev->tx.tx_lock);
 152         if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
 153                 spin_unlock(&hif_dev->tx.tx_lock);
 154                 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
 155                 goto add_free;
 156         }
 157         spin_unlock(&hif_dev->tx.tx_lock);
 158
 159         /* Complete the queued SKBs. */
 160         while ((skb = __skb_dequeue(&tx_buf->skb_queue)) != NULL) {
 161                 ath9k_htc_txcompletion_cb(hif_dev->htc_handle,
 162                                           skb, 1);
 163                 TX_STAT_INC(skb_completed);
 164         }
 165
 166 add_free:
 167         /* Re-initialize the SKB queue */
 168         tx_buf->len = tx_buf->offset = 0;
 169         __skb_queue_head_init(&tx_buf->skb_queue);
 170
 171         /* Add this TX buffer to the free list */
 172         spin_lock(&hif_dev->tx.tx_lock);
 173         list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 174         hif_dev->tx.tx_buf_cnt++;
 175         if (!(hif_dev->tx.flags & HIF_USB_TX_STOP))
 176                 __hif_usb_tx(hif_dev); /* Check for pending SKBs */
 177         TX_STAT_INC(buf_completed);
 178         spin_unlock(&hif_dev->tx.tx_lock);
 179 }
 180
 181 /* TX lock has to be taken */
 182 static int __hif_usb_tx(struct hif_device_usb *hif_dev)
 183 {
 184         struct tx_buf *tx_buf = NULL;
 185         struct sk_buff *nskb = NULL;
 186         int ret = 0, i;
 187         u16 *hdr, tx_skb_cnt = 0;
 188         u8 *buf;
 189
 190         if (hif_dev->tx.tx_skb_cnt == 0)
 191                 return 0;
 192
 193         /* Check if a free TX buffer is available */
 194         if (list_empty(&hif_dev->tx.tx_buf))
 195                 return 0;
 196
 197         tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list);
 198         list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending);
 199         hif_dev->tx.tx_buf_cnt--;
 200
 201         tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM);
 202
 203         for (i = 0; i < tx_skb_cnt; i++) {
 204                 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue);
 205
 206                 /* Should never be NULL */
 207                 BUG_ON(!nskb);
 208
 209                 hif_dev->tx.tx_skb_cnt--;
 210
 211                 buf = tx_buf->buf;
 212                 buf += tx_buf->offset;
 213                 hdr = (u16 *)buf;
 214                 *hdr++ = nskb->len;
 215                 *hdr++ = ATH_USB_TX_STREAM_MODE_TAG;
 216                 buf += 4;
 217                 memcpy(buf, nskb->data, nskb->len);
 218                 tx_buf->len = nskb->len + 4;
 219
 220                 if (i < (tx_skb_cnt - 1))
 221                         tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4;
 222
 223                 if (i == (tx_skb_cnt - 1))
 224                         tx_buf->len += tx_buf->offset;
 225
 226                 __skb_queue_tail(&tx_buf->skb_queue, nskb);
 227                 TX_STAT_INC(skb_queued);
 228         }
 229
 230         usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev,
 231                           usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE),
 232                           tx_buf->buf, tx_buf->len,
 233                           hif_usb_tx_cb, tx_buf);
 234
 235         ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC);
 236         if (ret) {
 237                 tx_buf->len = tx_buf->offset = 0;
 238                 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue);
 239                 __skb_queue_head_init(&tx_buf->skb_queue);
 240                 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 241                 hif_dev->tx.tx_buf_cnt++;
 242         }
 243
 244         if (!ret)
 245                 TX_STAT_INC(buf_queued);
 246
 247         return ret;
 248 }
 249
 250 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb,
 251                            struct ath9k_htc_tx_ctl *tx_ctl)
 252 {
 253         unsigned long flags;
 254
 255         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 256
 257         if (hif_dev->tx.flags & HIF_USB_TX_STOP) {
 258                 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 259                 return -ENODEV;
 260         }
 261
 262         /* Check if the max queue count has been reached */
 263         if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) {
 264                 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 265                 return -ENOMEM;
 266         }
 267
 268         __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb);
 269         hif_dev->tx.tx_skb_cnt++;
 270
 271         /* Send normal frames immediately */
 272         if (!tx_ctl || (tx_ctl && (tx_ctl->type == ATH9K_HTC_NORMAL)))
 273                 __hif_usb_tx(hif_dev);
 274
 275         /* Check if AMPDUs have to be sent immediately */
 276         if (tx_ctl && (tx_ctl->type == ATH9K_HTC_AMPDU) &&
 277             (hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) &&
 278             (hif_dev->tx.tx_skb_cnt < 2)) {
 279                 __hif_usb_tx(hif_dev);
 280         }
 281
 282         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 283
 284         return 0;
 285 }
 286
 287 static void hif_usb_start(void *hif_handle, u8 pipe_id)
 288 {
 289         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 290         unsigned long flags;
 291
 292         hif_dev->flags |= HIF_USB_START;
 293
 294         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 295         hif_dev->tx.flags &= ~HIF_USB_TX_STOP;
 296         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 297 }
 298
 299 static void hif_usb_stop(void *hif_handle, u8 pipe_id)
 300 {
 301         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 302         unsigned long flags;
 303
 304         spin_lock_irqsave(&hif_dev->tx.tx_lock, flags);
 305         ath9k_skb_queue_purge(hif_dev, &hif_dev->tx.tx_skb_queue);
 306         hif_dev->tx.tx_skb_cnt = 0;
 307         hif_dev->tx.flags |= HIF_USB_TX_STOP;
 308         spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags);
 309 }
 310
 311 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb,
 312                         struct ath9k_htc_tx_ctl *tx_ctl)
 313 {
 314         struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle;
 315         int ret = 0;
 316
 317         switch (pipe_id) {
 318         case USB_WLAN_TX_PIPE:
 319                 ret = hif_usb_send_tx(hif_dev, skb, tx_ctl);
 320                 break;
 321         case USB_REG_OUT_PIPE:
 322                 ret = hif_usb_send_regout(hif_dev, skb);
 323                 break;
 324         default:
 325                 dev_err(&hif_dev->udev->dev,
 326                         "ath9k_htc: Invalid TX pipe: %d\n", pipe_id);
 327                 ret = -EINVAL;
 328                 break;
 329         }
 330
 331         return ret;
 332 }
 333
 334 static struct ath9k_htc_hif hif_usb = {
 335         .transport = ATH9K_HIF_USB,
 336         .name = "ath9k_hif_usb",
 337
 338         .control_ul_pipe = USB_REG_OUT_PIPE,
 339         .control_dl_pipe = USB_REG_IN_PIPE,
 340
 341         .start = hif_usb_start,
 342         .stop = hif_usb_stop,
 343         .send = hif_usb_send,
 344 };
 345
 346 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
 347                                     struct sk_buff *skb)
 348 {
 349         struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER];
 350         int index = 0, i = 0, chk_idx, len = skb->len;
 351         int rx_remain_len = 0, rx_pkt_len = 0;
 352         u16 pkt_len, pkt_tag, pool_index = 0;
 353         u8 *ptr;
 354
 355         spin_lock(&hif_dev->rx_lock);
 356
 357         rx_remain_len = hif_dev->rx_remain_len;
 358         rx_pkt_len = hif_dev->rx_transfer_len;
 359
 360         if (rx_remain_len != 0) {
 361                 struct sk_buff *remain_skb = hif_dev->remain_skb;
 362
 363                 if (remain_skb) {
 364                         ptr = (u8 *) remain_skb->data;
 365
 366                         index = rx_remain_len;
 367                         rx_remain_len -= hif_dev->rx_pad_len;
 368                         ptr += rx_pkt_len;
 369
 370                         memcpy(ptr, skb->data, rx_remain_len);
 371
 372                         rx_pkt_len += rx_remain_len;
 373                         hif_dev->rx_remain_len = 0;
 374                         skb_put(remain_skb, rx_pkt_len);
 375
 376                         skb_pool[pool_index++] = remain_skb;
 377
 378                 } else {
 379                         index = rx_remain_len;
 380                 }
 381         }
 382
 383         spin_unlock(&hif_dev->rx_lock);
 384
 385         while (index < len) {
 386                 ptr = (u8 *) skb->data;
 387
 388                 pkt_len = ptr[index] + (ptr[index+1] << 8);
 389                 pkt_tag = ptr[index+2] + (ptr[index+3] << 8);
 390
 391                 if (pkt_tag == ATH_USB_RX_STREAM_MODE_TAG) {
 392                         u16 pad_len;
 393
 394                         pad_len = 4 - (pkt_len & 0x3);
 395                         if (pad_len == 4)
 396                                 pad_len = 0;
 397
 398                         chk_idx = index;
 399                         index = index + 4 + pkt_len + pad_len;
 400
 401                         if (index > MAX_RX_BUF_SIZE) {
 402                                 spin_lock(&hif_dev->rx_lock);
 403                                 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE;
 404                                 hif_dev->rx_transfer_len =
 405                                         MAX_RX_BUF_SIZE - chk_idx - 4;
 406                                 hif_dev->rx_pad_len = pad_len;
 407
 408                                 nskb = __dev_alloc_skb(pkt_len + 32,
 409                                                        GFP_ATOMIC);
 410                                 if (!nskb) {
 411                                         dev_err(&hif_dev->udev->dev,
 412                                         "ath9k_htc: RX memory allocation"
 413                                         " error\n");
 414                                         spin_unlock(&hif_dev->rx_lock);
 415                                         goto err;
 416                                 }
 417                                 skb_reserve(nskb, 32);
 418                                 RX_STAT_INC(skb_allocated);
 419
 420                                 memcpy(nskb->data, &(skb->data[chk_idx+4]),
 421                                        hif_dev->rx_transfer_len);
 422
 423                                 /* Record the buffer pointer */
 424                                 hif_dev->remain_skb = nskb;
 425                                 spin_unlock(&hif_dev->rx_lock);
 426                         } else {
 427                                 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
 428                                 if (!nskb) {
 429                                         dev_err(&hif_dev->udev->dev,
 430                                         "ath9k_htc: RX memory allocation"
 431                                         " error\n");
 432                                         goto err;
 433                                 }
 434                                 skb_reserve(nskb, 32);
 435                                 RX_STAT_INC(skb_allocated);
 436
 437                                 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len);
 438                                 skb_put(nskb, pkt_len);
 439                                 skb_pool[pool_index++] = nskb;
 440                         }
 441                 } else {
 442                         RX_STAT_INC(skb_dropped);
 443                         return;
 444                 }
 445         }
 446
 447 err:
 448         for (i = 0; i < pool_index; i++) {
 449                 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i],
 450                                  skb_pool[i]->len, USB_WLAN_RX_PIPE);
 451                 RX_STAT_INC(skb_completed);
 452         }
 453 }
 454
 455 static void ath9k_hif_usb_rx_cb(struct urb *urb)
 456 {
 457         struct sk_buff *skb = (struct sk_buff *) urb->context;
 458         struct hif_device_usb *hif_dev = (struct hif_device_usb *)
 459                 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
 460         int ret;
 461
 462         if (!skb)
 463                 return;
 464
 465         if (!hif_dev)
 466                 goto free;
 467
 468         switch (urb->status) {
 469         case 0:
 470                 break;
 471         case -ENOENT:
 472         case -ECONNRESET:
 473         case -ENODEV:
 474         case -ESHUTDOWN:
 475                 goto free;
 476         default:
 477                 goto resubmit;
 478         }
 479
 480         if (likely(urb->actual_length != 0)) {
 481                 skb_put(skb, urb->actual_length);
 482                 ath9k_hif_usb_rx_stream(hif_dev, skb);
 483         }
 484
 485 resubmit:
 486         skb_reset_tail_pointer(skb);
 487         skb_trim(skb, 0);
 488
 489         usb_anchor_urb(urb, &hif_dev->rx_submitted);
 490         ret = usb_submit_urb(urb, GFP_ATOMIC);
 491         if (ret) {
 492                 usb_unanchor_urb(urb);
 493                 goto free;
 494         }
 495
 496         return;
 497 free:
 498         kfree_skb(skb);
 499 }
 500
 501 static void ath9k_hif_usb_reg_in_cb(struct urb *urb)
 502 {
 503         struct sk_buff *skb = (struct sk_buff *) urb->context;
 504         struct sk_buff *nskb;
 505         struct hif_device_usb *hif_dev = (struct hif_device_usb *)
 506                 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0));
 507         int ret;
 508
 509         if (!skb)
 510                 return;
 511
 512         if (!hif_dev)
 513                 goto free;
 514
 515         switch (urb->status) {
 516         case 0:
 517                 break;
 518         case -ENOENT:
 519         case -ECONNRESET:
 520         case -ENODEV:
 521         case -ESHUTDOWN:
 522                 goto free;
 523         default:
 524                 goto resubmit;
 525         }
 526
 527         if (likely(urb->actual_length != 0)) {
 528                 skb_put(skb, urb->actual_length);
 529
 530                 /* Process the command first */
 531                 ath9k_htc_rx_msg(hif_dev->htc_handle, skb,
 532                                  skb->len, USB_REG_IN_PIPE);
 533
 534
 535                 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC);
 536                 if (!nskb) {
 537                         dev_err(&hif_dev->udev->dev,
 538                                 "ath9k_htc: REG_IN memory allocation failure\n");
 539                         urb->context = NULL;
 540                         return;
 541                 }
 542
 543                 usb_fill_int_urb(urb, hif_dev->udev,
 544                                  usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
 545                                  nskb->data, MAX_REG_IN_BUF_SIZE,
 546                                  ath9k_hif_usb_reg_in_cb, nskb, 1);
 547
 548                 ret = usb_submit_urb(urb, GFP_ATOMIC);
 549                 if (ret) {
 550                         kfree_skb(nskb);
 551                         urb->context = NULL;
 552                 }
 553
 554                 return;
 555         }
 556
 557 resubmit:
 558         skb_reset_tail_pointer(skb);
 559         skb_trim(skb, 0);
 560
 561         ret = usb_submit_urb(urb, GFP_ATOMIC);
 562         if (ret)
 563                 goto free;
 564
 565         return;
 566 free:
 567         kfree_skb(skb);
 568         urb->context = NULL;
 569 }
 570
 571 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev)
 572 {
 573         struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL;
 574
 575         list_for_each_entry_safe(tx_buf, tx_buf_tmp,
 576                                  &hif_dev->tx.tx_buf, list) {
 577                 usb_kill_urb(tx_buf->urb);
 578                 list_del(&tx_buf->list);
 579                 usb_free_urb(tx_buf->urb);
 580                 kfree(tx_buf->buf);
 581                 kfree(tx_buf);
 582         }
 583
 584         list_for_each_entry_safe(tx_buf, tx_buf_tmp,
 585                                  &hif_dev->tx.tx_pending, list) {
 586                 usb_kill_urb(tx_buf->urb);
 587                 list_del(&tx_buf->list);
 588                 usb_free_urb(tx_buf->urb);
 589                 kfree(tx_buf->buf);
 590                 kfree(tx_buf);
 591         }
 592 }
 593
 594 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev)
 595 {
 596         struct tx_buf *tx_buf;
 597         int i;
 598
 599         INIT_LIST_HEAD(&hif_dev->tx.tx_buf);
 600         INIT_LIST_HEAD(&hif_dev->tx.tx_pending);
 601         spin_lock_init(&hif_dev->tx.tx_lock);
 602         __skb_queue_head_init(&hif_dev->tx.tx_skb_queue);
 603
 604         for (i = 0; i < MAX_TX_URB_NUM; i++) {
 605                 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL);
 606                 if (!tx_buf)
 607                         goto err;
 608
 609                 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL);
 610                 if (!tx_buf->buf)
 611                         goto err;
 612
 613                 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL);
 614                 if (!tx_buf->urb)
 615                         goto err;
 616
 617                 tx_buf->hif_dev = hif_dev;
 618                 __skb_queue_head_init(&tx_buf->skb_queue);
 619
 620                 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf);
 621         }
 622
 623         hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM;
 624
 625         return 0;
 626 err:
 627         if (tx_buf) {
 628                 kfree(tx_buf->buf);
 629                 kfree(tx_buf);
 630         }
 631         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 632         return -ENOMEM;
 633 }
 634
 635 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev)
 636 {
 637         usb_kill_anchored_urbs(&hif_dev->rx_submitted);
 638 }
 639
 640 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev)
 641 {
 642         struct urb *urb = NULL;
 643         struct sk_buff *skb = NULL;
 644         int i, ret;
 645
 646         init_usb_anchor(&hif_dev->rx_submitted);
 647         spin_lock_init(&hif_dev->rx_lock);
 648
 649         for (i = 0; i < MAX_RX_URB_NUM; i++) {
 650
 651                 /* Allocate URB */
 652                 urb = usb_alloc_urb(0, GFP_KERNEL);
 653                 if (urb == NULL) {
 654                         ret = -ENOMEM;
 655                         goto err_urb;
 656                 }
 657
 658                 /* Allocate buffer */
 659                 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL);
 660                 if (!skb) {
 661                         ret = -ENOMEM;
 662                         goto err_skb;
 663                 }
 664
 665                 usb_fill_bulk_urb(urb, hif_dev->udev,
 666                                   usb_rcvbulkpipe(hif_dev->udev,
 667                                                   USB_WLAN_RX_PIPE),
 668                                   skb->data, MAX_RX_BUF_SIZE,
 669                                   ath9k_hif_usb_rx_cb, skb);
 670
 671                 /* Anchor URB */
 672                 usb_anchor_urb(urb, &hif_dev->rx_submitted);
 673
 674                 /* Submit URB */
 675                 ret = usb_submit_urb(urb, GFP_KERNEL);
 676                 if (ret) {
 677                         usb_unanchor_urb(urb);
 678                         goto err_submit;
 679                 }
 680
 681                 /*
 682                  * Drop reference count.
 683                  * This ensures that the URB is freed when killing them.
 684                  */
 685                 usb_free_urb(urb);
 686         }
 687
 688         return 0;
 689
 690 err_submit:
 691         kfree_skb(skb);
 692 err_skb:
 693         usb_free_urb(urb);
 694 err_urb:
 695         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 696         return ret;
 697 }
 698
 699 static void ath9k_hif_usb_dealloc_reg_in_urb(struct hif_device_usb *hif_dev)
 700 {
 701         if (hif_dev->reg_in_urb) {
 702                 usb_kill_urb(hif_dev->reg_in_urb);
 703                 if (hif_dev->reg_in_urb->context)
 704                         kfree_skb((void *)hif_dev->reg_in_urb->context);
 705                 usb_free_urb(hif_dev->reg_in_urb);
 706                 hif_dev->reg_in_urb = NULL;
 707         }
 708 }
 709
 710 static int ath9k_hif_usb_alloc_reg_in_urb(struct hif_device_usb *hif_dev)
 711 {
 712         struct sk_buff *skb;
 713
 714         hif_dev->reg_in_urb = usb_alloc_urb(0, GFP_KERNEL);
 715         if (hif_dev->reg_in_urb == NULL)
 716                 return -ENOMEM;
 717
 718         skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL);
 719         if (!skb)
 720                 goto err;
 721
 722         usb_fill_int_urb(hif_dev->reg_in_urb, hif_dev->udev,
 723                          usb_rcvintpipe(hif_dev->udev, USB_REG_IN_PIPE),
 724                          skb->data, MAX_REG_IN_BUF_SIZE,
 725                          ath9k_hif_usb_reg_in_cb, skb, 1);
 726
 727         if (usb_submit_urb(hif_dev->reg_in_urb, GFP_KERNEL) != 0)
 728                 goto err;
 729
 730         return 0;
 731
 732 err:
 733         ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
 734         return -ENOMEM;
 735 }
 736
 737 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev)
 738 {
 739         /* Register Write */
 740         init_usb_anchor(&hif_dev->regout_submitted);
 741
 742         /* TX */
 743         if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0)
 744                 goto err;
 745
 746         /* RX */
 747         if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0)
 748                 goto err_rx;
 749
 750         /* Register Read */
 751         if (ath9k_hif_usb_alloc_reg_in_urb(hif_dev) < 0)
 752                 goto err_reg;
 753
 754         return 0;
 755 err_reg:
 756         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 757 err_rx:
 758         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 759 err:
 760         return -ENOMEM;
 761 }
 762
 763 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev)
 764 {
 765         usb_kill_anchored_urbs(&hif_dev->regout_submitted);
 766         ath9k_hif_usb_dealloc_reg_in_urb(hif_dev);
 767         ath9k_hif_usb_dealloc_tx_urbs(hif_dev);
 768         ath9k_hif_usb_dealloc_rx_urbs(hif_dev);
 769 }
 770
 771 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev)
 772 {
 773         int transfer, err;
 774         const void *data = hif_dev->firmware->data;
 775         size_t len = hif_dev->firmware->size;
 776         u32 addr = AR9271_FIRMWARE;
 777         u8 *buf = kzalloc(4096, GFP_KERNEL);
 778         u32 firm_offset;
 779
 780         if (!buf)
 781                 return -ENOMEM;
 782
 783         while (len) {
 784                 transfer = min_t(int, len, 4096);
 785                 memcpy(buf, data, transfer);
 786
 787                 err = usb_control_msg(hif_dev->udev,
 788                                       usb_sndctrlpipe(hif_dev->udev, 0),
 789                                       FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT,
 790                                       addr >> 8, 0, buf, transfer, HZ);
 791                 if (err < 0) {
 792                         kfree(buf);
 793                         return err;
 794                 }
 795
 796                 len -= transfer;
 797                 data += transfer;
 798                 addr += transfer;
 799         }
 800         kfree(buf);
 801
 802         if ((hif_dev->device_id == 0x7010) || (hif_dev->device_id == 0x7015))
 803                 firm_offset = AR7010_FIRMWARE_TEXT;
 804         else
 805                 firm_offset = AR9271_FIRMWARE_TEXT;
 806
 807         /*
 808          * Issue FW download complete command to firmware.
 809          */
 810         err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0),
 811                               FIRMWARE_DOWNLOAD_COMP,
 812                               0x40 | USB_DIR_OUT,
 813                               firm_offset >> 8, 0, NULL, 0, HZ);
 814         if (err)
 815                 return -EIO;
 816
 817         dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n",
 818                  hif_dev->fw_name, (unsigned long) hif_dev->firmware->size);
 819
 820         return 0;
 821 }
 822
 823 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev)
 824 {
 825         int ret;
 826
 827         /* Request firmware */
 828         ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name,
 829                                &hif_dev->udev->dev);
 830         if (ret) {
 831                 dev_err(&hif_dev->udev->dev,
 832                         "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name);
 833                 goto err_fw_req;
 834         }
 835
 836         /* Alloc URBs */
 837         ret = ath9k_hif_usb_alloc_urbs(hif_dev);
 838         if (ret) {
 839                 dev_err(&hif_dev->udev->dev,
 840                         "ath9k_htc: Unable to allocate URBs\n");
 841                 goto err_urb;
 842         }
 843
 844         /* Download firmware */
 845         ret = ath9k_hif_usb_download_fw(hif_dev);
 846         if (ret) {
 847                 dev_err(&hif_dev->udev->dev,
 848                         "ath9k_htc: Firmware - %s download failed\n",
 849                         hif_dev->fw_name);
 850                 goto err_fw_download;
 851         }
 852
 853         return 0;
 854
 855 err_fw_download:
 856         ath9k_hif_usb_dealloc_urbs(hif_dev);
 857 err_urb:
 858         release_firmware(hif_dev->firmware);
 859 err_fw_req:
 860         hif_dev->firmware = NULL;
 861         return ret;
 862 }
 863
 864 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev)
 865 {
 866         ath9k_hif_usb_dealloc_urbs(hif_dev);
 867         if (hif_dev->firmware)
 868                 release_firmware(hif_dev->firmware);
 869 }
 870
 871 static int ath9k_hif_usb_probe(struct usb_interface *interface,
 872                                const struct usb_device_id *id)
 873 {
 874         struct usb_device *udev = interface_to_usbdev(interface);
 875         struct hif_device_usb *hif_dev;
 876         int ret = 0;
 877
 878         hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL);
 879         if (!hif_dev) {
 880                 ret = -ENOMEM;
 881                 goto err_alloc;
 882         }
 883
 884         usb_get_dev(udev);
 885         hif_dev->udev = udev;
 886         hif_dev->interface = interface;
 887         hif_dev->device_id = id->idProduct;
 888 #ifdef CONFIG_PM
 889         udev->reset_resume = 1;
 890 #endif
 891         usb_set_intfdata(interface, hif_dev);
 892
 893         hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb,
 894                                                  &hif_dev->udev->dev);
 895         if (hif_dev->htc_handle == NULL) {
 896                 ret = -ENOMEM;
 897                 goto err_htc_hw_alloc;
 898         }
 899
 900         /* Find out which firmware to load */
 901
 902         switch(hif_dev->device_id) {
 903         case 0x7010:
 904         case 0x7015:
 905         case 0x9018:
 906                 if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x0202)
 907                         hif_dev->fw_name = FIRMWARE_AR7010_1_1;
 908                 else
 909                         hif_dev->fw_name = FIRMWARE_AR7010;
 910                 break;
 911         default:
 912                 hif_dev->fw_name = FIRMWARE_AR9271;
 913                 break;
 914         }
 915
 916         ret = ath9k_hif_usb_dev_init(hif_dev);
 917         if (ret) {
 918                 ret = -EINVAL;
 919                 goto err_hif_init_usb;
 920         }
 921
 922         ret = ath9k_htc_hw_init(hif_dev->htc_handle,
 923                                 &hif_dev->udev->dev, hif_dev->device_id);
 924         if (ret) {
 925                 ret = -EINVAL;
 926                 goto err_htc_hw_init;
 927         }
 928
 929         dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n");
 930
 931         return 0;
 932
 933 err_htc_hw_init:
 934         ath9k_hif_usb_dev_deinit(hif_dev);
 935 err_hif_init_usb:
 936         ath9k_htc_hw_free(hif_dev->htc_handle);
 937 err_htc_hw_alloc:
 938         usb_set_intfdata(interface, NULL);
 939         kfree(hif_dev);
 940         usb_put_dev(udev);
 941 err_alloc:
 942         return ret;
 943 }
 944
 945 static void ath9k_hif_usb_reboot(struct usb_device *udev)
 946 {
 947         u32 reboot_cmd = 0xffffffff;
 948         void *buf;
 949         int ret;
 950
 951         buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL);
 952         if (!buf)
 953                 return;
 954
 955         ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE),
 956                            buf, 4, NULL, HZ);
 957         if (ret)
 958                 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n");
 959
 960         kfree(buf);
 961 }
 962
 963 static void ath9k_hif_usb_disconnect(struct usb_interface *interface)
 964 {
 965         struct usb_device *udev = interface_to_usbdev(interface);
 966         struct hif_device_usb *hif_dev =
 967                 (struct hif_device_usb *) usb_get_intfdata(interface);
 968
 969         if (hif_dev) {
 970                 ath9k_htc_hw_deinit(hif_dev->htc_handle,
 971                     (udev->state == USB_STATE_NOTATTACHED) ? true : false);
 972                 ath9k_htc_hw_free(hif_dev->htc_handle);
 973                 ath9k_hif_usb_dev_deinit(hif_dev);
 974                 usb_set_intfdata(interface, NULL);
 975         }
 976
 977         if (hif_dev->flags & HIF_USB_START)
 978                 ath9k_hif_usb_reboot(udev);
 979
 980         kfree(hif_dev);
 981         dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n");
 982         usb_put_dev(udev);
 983 }
 984
 985 #ifdef CONFIG_PM
 986 static int ath9k_hif_usb_suspend(struct usb_interface *interface,
 987                                  pm_message_t message)
 988 {
 989         struct hif_device_usb *hif_dev =
 990                 (struct hif_device_usb *) usb_get_intfdata(interface);
 991
 992         ath9k_hif_usb_dealloc_urbs(hif_dev);
 993
 994         return 0;
 995 }
 996
 997 static int ath9k_hif_usb_resume(struct usb_interface *interface)
 998 {
 999         struct hif_device_usb *hif_dev =
1000                 (struct hif_device_usb *) usb_get_intfdata(interface);
1001         int ret;
1002
1003         ret = ath9k_hif_usb_alloc_urbs(hif_dev);
1004         if (ret)
1005                 return ret;
1006
1007         if (hif_dev->firmware) {
1008                 ret = ath9k_hif_usb_download_fw(hif_dev);
1009                 if (ret)
1010                         goto fail_resume;
1011         } else {
1012                 ath9k_hif_usb_dealloc_urbs(hif_dev);
1013                 return -EIO;
1014         }
1015
1016         mdelay(100);
1017
1018         ret = ath9k_htc_resume(hif_dev->htc_handle);
1019
1020         if (ret)
1021                 goto fail_resume;
1022
1023         return 0;
1024
1025 fail_resume:
1026         ath9k_hif_usb_dealloc_urbs(hif_dev);
1027
1028         return ret;
1029 }
1030 #endif
1031
1032 static struct usb_driver ath9k_hif_usb_driver = {
1033         .name = "ath9k_hif_usb",
1034         .probe = ath9k_hif_usb_probe,
1035         .disconnect = ath9k_hif_usb_disconnect,
1036 #ifdef CONFIG_PM
1037         .suspend = ath9k_hif_usb_suspend,
1038         .resume = ath9k_hif_usb_resume,
1039         .reset_resume = ath9k_hif_usb_resume,
1040 #endif
1041         .id_table = ath9k_hif_usb_ids,
1042         .soft_unbind = 1,
1043 };
1044
1045 int ath9k_hif_usb_init(void)
1046 {
1047         return usb_register(&ath9k_hif_usb_driver);
1048 }
1049
1050 void ath9k_hif_usb_exit(void)
1051 {
1052         usb_deregister(&ath9k_hif_usb_driver);
1053 }