1 /* 2 * Copyright (c) 2010-2011 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 <asm/unaligned.h> 18 #include "htc.h" 19 20 /* identify firmware images */ 21 #define FIRMWARE_AR7010_1_1 "htc_7010.fw" 22 #define FIRMWARE_AR9271 "htc_9271.fw" 23 24 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1); 25 MODULE_FIRMWARE(FIRMWARE_AR9271); 26 27 static struct usb_device_id ath9k_hif_usb_ids[] = { 28 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */ 29 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */ 30 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */ 31 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */ 32 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */ 33 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */ 34 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */ 35 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */ 36 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */ 37 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */ 38 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */ 39 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */ 40 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */ 41 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */ 42 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */ 43 44 { USB_DEVICE(0x0cf3, 0x7015), 45 .driver_info = AR9287_USB }, /* Atheros */ 46 { USB_DEVICE(0x1668, 0x1200), 47 .driver_info = AR9287_USB }, /* Verizon */ 48 49 { USB_DEVICE(0x0cf3, 0x7010), 50 .driver_info = AR9280_USB }, /* Atheros */ 51 { USB_DEVICE(0x0846, 0x9018), 52 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */ 53 { USB_DEVICE(0x083A, 0xA704), 54 .driver_info = AR9280_USB }, /* SMC Networks */ 55 { USB_DEVICE(0x0411, 0x017f), 56 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */ 57 { USB_DEVICE(0x04da, 0x3904), 58 .driver_info = AR9280_USB }, 59 60 { USB_DEVICE(0x0cf3, 0x20ff), 61 .driver_info = STORAGE_DEVICE }, 62 63 { }, 64 }; 65 66 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); 67 68 static int __hif_usb_tx(struct hif_device_usb *hif_dev); 69 70 static void hif_usb_regout_cb(struct urb *urb) 71 { 72 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 73 74 switch (urb->status) { 75 case 0: 76 break; 77 case -ENOENT: 78 case -ECONNRESET: 79 case -ENODEV: 80 case -ESHUTDOWN: 81 goto free; 82 default: 83 break; 84 } 85 86 if (cmd) { 87 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 88 cmd->skb, true); 89 kfree(cmd); 90 } 91 92 return; 93 free: 94 kfree_skb(cmd->skb); 95 kfree(cmd); 96 } 97 98 static int hif_usb_send_regout(struct hif_device_usb *hif_dev, 99 struct sk_buff *skb) 100 { 101 struct urb *urb; 102 struct cmd_buf *cmd; 103 int ret = 0; 104 105 urb = usb_alloc_urb(0, GFP_KERNEL); 106 if (urb == NULL) 107 return -ENOMEM; 108 109 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 110 if (cmd == NULL) { 111 usb_free_urb(urb); 112 return -ENOMEM; 113 } 114 115 cmd->skb = skb; 116 cmd->hif_dev = hif_dev; 117 118 usb_fill_bulk_urb(urb, hif_dev->udev, 119 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE), 120 skb->data, skb->len, 121 hif_usb_regout_cb, cmd); 122 123 usb_anchor_urb(urb, &hif_dev->regout_submitted); 124 ret = usb_submit_urb(urb, GFP_KERNEL); 125 if (ret) { 126 usb_unanchor_urb(urb); 127 kfree(cmd); 128 } 129 usb_free_urb(urb); 130 131 return ret; 132 } 133 134 static void hif_usb_mgmt_cb(struct urb *urb) 135 { 136 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 137 struct hif_device_usb *hif_dev; 138 bool txok = true; 139 140 if (!cmd || !cmd->skb || !cmd->hif_dev) 141 return; 142 143 hif_dev = cmd->hif_dev; 144 145 switch (urb->status) { 146 case 0: 147 break; 148 case -ENOENT: 149 case -ECONNRESET: 150 case -ENODEV: 151 case -ESHUTDOWN: 152 txok = false; 153 154 /* 155 * If the URBs are being flushed, no need to complete 156 * this packet. 157 */ 158 spin_lock(&hif_dev->tx.tx_lock); 159 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 160 spin_unlock(&hif_dev->tx.tx_lock); 161 dev_kfree_skb_any(cmd->skb); 162 kfree(cmd); 163 return; 164 } 165 spin_unlock(&hif_dev->tx.tx_lock); 166 167 break; 168 default: 169 txok = false; 170 break; 171 } 172 173 skb_pull(cmd->skb, 4); 174 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 175 cmd->skb, txok); 176 kfree(cmd); 177 } 178 179 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 180 struct sk_buff *skb) 181 { 182 struct urb *urb; 183 struct cmd_buf *cmd; 184 int ret = 0; 185 __le16 *hdr; 186 187 urb = usb_alloc_urb(0, GFP_ATOMIC); 188 if (urb == NULL) 189 return -ENOMEM; 190 191 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 192 if (cmd == NULL) { 193 usb_free_urb(urb); 194 return -ENOMEM; 195 } 196 197 cmd->skb = skb; 198 cmd->hif_dev = hif_dev; 199 200 hdr = (__le16 *) skb_push(skb, 4); 201 *hdr++ = cpu_to_le16(skb->len - 4); 202 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 203 204 usb_fill_bulk_urb(urb, hif_dev->udev, 205 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 206 skb->data, skb->len, 207 hif_usb_mgmt_cb, cmd); 208 209 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 210 ret = usb_submit_urb(urb, GFP_ATOMIC); 211 if (ret) { 212 usb_unanchor_urb(urb); 213 kfree(cmd); 214 } 215 usb_free_urb(urb); 216 217 return ret; 218 } 219 220 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 221 struct sk_buff_head *list) 222 { 223 struct sk_buff *skb; 224 225 while ((skb = __skb_dequeue(list)) != NULL) { 226 dev_kfree_skb_any(skb); 227 } 228 } 229 230 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 231 struct sk_buff_head *queue, 232 bool txok) 233 { 234 struct sk_buff *skb; 235 236 while ((skb = __skb_dequeue(queue)) != NULL) { 237 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 238 skb, txok); 239 if (txok) 240 TX_STAT_INC(skb_success); 241 else 242 TX_STAT_INC(skb_failed); 243 } 244 } 245 246 static void hif_usb_tx_cb(struct urb *urb) 247 { 248 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 249 struct hif_device_usb *hif_dev; 250 bool txok = true; 251 252 if (!tx_buf || !tx_buf->hif_dev) 253 return; 254 255 hif_dev = tx_buf->hif_dev; 256 257 switch (urb->status) { 258 case 0: 259 break; 260 case -ENOENT: 261 case -ECONNRESET: 262 case -ENODEV: 263 case -ESHUTDOWN: 264 txok = false; 265 266 /* 267 * If the URBs are being flushed, no need to add this 268 * URB to the free list. 269 */ 270 spin_lock(&hif_dev->tx.tx_lock); 271 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 272 spin_unlock(&hif_dev->tx.tx_lock); 273 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 274 return; 275 } 276 spin_unlock(&hif_dev->tx.tx_lock); 277 278 break; 279 default: 280 txok = false; 281 break; 282 } 283 284 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 285 286 /* Re-initialize the SKB queue */ 287 tx_buf->len = tx_buf->offset = 0; 288 __skb_queue_head_init(&tx_buf->skb_queue); 289 290 /* Add this TX buffer to the free list */ 291 spin_lock(&hif_dev->tx.tx_lock); 292 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 293 hif_dev->tx.tx_buf_cnt++; 294 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 295 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 296 TX_STAT_INC(buf_completed); 297 spin_unlock(&hif_dev->tx.tx_lock); 298 } 299 300 /* TX lock has to be taken */ 301 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 302 { 303 struct tx_buf *tx_buf = NULL; 304 struct sk_buff *nskb = NULL; 305 int ret = 0, i; 306 u16 tx_skb_cnt = 0; 307 u8 *buf; 308 __le16 *hdr; 309 310 if (hif_dev->tx.tx_skb_cnt == 0) 311 return 0; 312 313 /* Check if a free TX buffer is available */ 314 if (list_empty(&hif_dev->tx.tx_buf)) 315 return 0; 316 317 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 318 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 319 hif_dev->tx.tx_buf_cnt--; 320 321 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 322 323 for (i = 0; i < tx_skb_cnt; i++) { 324 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 325 326 /* Should never be NULL */ 327 BUG_ON(!nskb); 328 329 hif_dev->tx.tx_skb_cnt--; 330 331 buf = tx_buf->buf; 332 buf += tx_buf->offset; 333 hdr = (__le16 *)buf; 334 *hdr++ = cpu_to_le16(nskb->len); 335 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 336 buf += 4; 337 memcpy(buf, nskb->data, nskb->len); 338 tx_buf->len = nskb->len + 4; 339 340 if (i < (tx_skb_cnt - 1)) 341 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 342 343 if (i == (tx_skb_cnt - 1)) 344 tx_buf->len += tx_buf->offset; 345 346 __skb_queue_tail(&tx_buf->skb_queue, nskb); 347 TX_STAT_INC(skb_queued); 348 } 349 350 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 351 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 352 tx_buf->buf, tx_buf->len, 353 hif_usb_tx_cb, tx_buf); 354 355 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 356 if (ret) { 357 tx_buf->len = tx_buf->offset = 0; 358 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 359 __skb_queue_head_init(&tx_buf->skb_queue); 360 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 361 hif_dev->tx.tx_buf_cnt++; 362 } 363 364 if (!ret) 365 TX_STAT_INC(buf_queued); 366 367 return ret; 368 } 369 370 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 371 { 372 struct ath9k_htc_tx_ctl *tx_ctl; 373 unsigned long flags; 374 int ret = 0; 375 376 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 377 378 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 379 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 380 return -ENODEV; 381 } 382 383 /* Check if the max queue count has been reached */ 384 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 385 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 386 return -ENOMEM; 387 } 388 389 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 390 391 tx_ctl = HTC_SKB_CB(skb); 392 393 /* Mgmt/Beacon frames don't use the TX buffer pool */ 394 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 395 (tx_ctl->type == ATH9K_HTC_BEACON)) { 396 ret = hif_usb_send_mgmt(hif_dev, skb); 397 } 398 399 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 400 401 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 402 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 403 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 404 hif_dev->tx.tx_skb_cnt++; 405 } 406 407 /* Check if AMPDUs have to be sent immediately */ 408 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 409 (hif_dev->tx.tx_skb_cnt < 2)) { 410 __hif_usb_tx(hif_dev); 411 } 412 413 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 414 415 return ret; 416 } 417 418 static void hif_usb_start(void *hif_handle) 419 { 420 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 421 unsigned long flags; 422 423 hif_dev->flags |= HIF_USB_START; 424 425 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 426 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 427 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 428 } 429 430 static void hif_usb_stop(void *hif_handle) 431 { 432 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 433 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 434 unsigned long flags; 435 436 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 437 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 438 hif_dev->tx.tx_skb_cnt = 0; 439 hif_dev->tx.flags |= HIF_USB_TX_STOP; 440 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 441 442 /* The pending URBs have to be canceled. */ 443 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 444 &hif_dev->tx.tx_pending, list) { 445 usb_kill_urb(tx_buf->urb); 446 } 447 448 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 449 } 450 451 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 452 { 453 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 454 int ret = 0; 455 456 switch (pipe_id) { 457 case USB_WLAN_TX_PIPE: 458 ret = hif_usb_send_tx(hif_dev, skb); 459 break; 460 case USB_REG_OUT_PIPE: 461 ret = hif_usb_send_regout(hif_dev, skb); 462 break; 463 default: 464 dev_err(&hif_dev->udev->dev, 465 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 466 ret = -EINVAL; 467 break; 468 } 469 470 return ret; 471 } 472 473 static inline bool check_index(struct sk_buff *skb, u8 idx) 474 { 475 struct ath9k_htc_tx_ctl *tx_ctl; 476 477 tx_ctl = HTC_SKB_CB(skb); 478 479 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 480 (tx_ctl->sta_idx == idx)) 481 return true; 482 483 return false; 484 } 485 486 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 487 { 488 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 489 struct sk_buff *skb, *tmp; 490 unsigned long flags; 491 492 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 493 494 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 495 if (check_index(skb, idx)) { 496 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 497 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 498 skb, false); 499 hif_dev->tx.tx_skb_cnt--; 500 TX_STAT_INC(skb_failed); 501 } 502 } 503 504 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 505 } 506 507 static struct ath9k_htc_hif hif_usb = { 508 .transport = ATH9K_HIF_USB, 509 .name = "ath9k_hif_usb", 510 511 .control_ul_pipe = USB_REG_OUT_PIPE, 512 .control_dl_pipe = USB_REG_IN_PIPE, 513 514 .start = hif_usb_start, 515 .stop = hif_usb_stop, 516 .sta_drain = hif_usb_sta_drain, 517 .send = hif_usb_send, 518 }; 519 520 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 521 struct sk_buff *skb) 522 { 523 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 524 int index = 0, i = 0, len = skb->len; 525 int rx_remain_len, rx_pkt_len; 526 u16 pool_index = 0; 527 u8 *ptr; 528 529 spin_lock(&hif_dev->rx_lock); 530 531 rx_remain_len = hif_dev->rx_remain_len; 532 rx_pkt_len = hif_dev->rx_transfer_len; 533 534 if (rx_remain_len != 0) { 535 struct sk_buff *remain_skb = hif_dev->remain_skb; 536 537 if (remain_skb) { 538 ptr = (u8 *) remain_skb->data; 539 540 index = rx_remain_len; 541 rx_remain_len -= hif_dev->rx_pad_len; 542 ptr += rx_pkt_len; 543 544 memcpy(ptr, skb->data, rx_remain_len); 545 546 rx_pkt_len += rx_remain_len; 547 hif_dev->rx_remain_len = 0; 548 skb_put(remain_skb, rx_pkt_len); 549 550 skb_pool[pool_index++] = remain_skb; 551 552 } else { 553 index = rx_remain_len; 554 } 555 } 556 557 spin_unlock(&hif_dev->rx_lock); 558 559 while (index < len) { 560 u16 pkt_len; 561 u16 pkt_tag; 562 u16 pad_len; 563 int chk_idx; 564 565 ptr = (u8 *) skb->data; 566 567 pkt_len = get_unaligned_le16(ptr + index); 568 pkt_tag = get_unaligned_le16(ptr + index + 2); 569 570 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 571 RX_STAT_INC(skb_dropped); 572 return; 573 } 574 575 pad_len = 4 - (pkt_len & 0x3); 576 if (pad_len == 4) 577 pad_len = 0; 578 579 chk_idx = index; 580 index = index + 4 + pkt_len + pad_len; 581 582 if (index > MAX_RX_BUF_SIZE) { 583 spin_lock(&hif_dev->rx_lock); 584 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 585 hif_dev->rx_transfer_len = 586 MAX_RX_BUF_SIZE - chk_idx - 4; 587 hif_dev->rx_pad_len = pad_len; 588 589 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 590 if (!nskb) { 591 dev_err(&hif_dev->udev->dev, 592 "ath9k_htc: RX memory allocation error\n"); 593 spin_unlock(&hif_dev->rx_lock); 594 goto err; 595 } 596 skb_reserve(nskb, 32); 597 RX_STAT_INC(skb_allocated); 598 599 memcpy(nskb->data, &(skb->data[chk_idx+4]), 600 hif_dev->rx_transfer_len); 601 602 /* Record the buffer pointer */ 603 hif_dev->remain_skb = nskb; 604 spin_unlock(&hif_dev->rx_lock); 605 } else { 606 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 607 if (!nskb) { 608 dev_err(&hif_dev->udev->dev, 609 "ath9k_htc: RX memory allocation error\n"); 610 goto err; 611 } 612 skb_reserve(nskb, 32); 613 RX_STAT_INC(skb_allocated); 614 615 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 616 skb_put(nskb, pkt_len); 617 skb_pool[pool_index++] = nskb; 618 } 619 } 620 621 err: 622 for (i = 0; i < pool_index; i++) { 623 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 624 skb_pool[i]->len, USB_WLAN_RX_PIPE); 625 RX_STAT_INC(skb_completed); 626 } 627 } 628 629 static void ath9k_hif_usb_rx_cb(struct urb *urb) 630 { 631 struct sk_buff *skb = (struct sk_buff *) urb->context; 632 struct hif_device_usb *hif_dev = 633 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 634 int ret; 635 636 if (!skb) 637 return; 638 639 if (!hif_dev) 640 goto free; 641 642 switch (urb->status) { 643 case 0: 644 break; 645 case -ENOENT: 646 case -ECONNRESET: 647 case -ENODEV: 648 case -ESHUTDOWN: 649 goto free; 650 default: 651 goto resubmit; 652 } 653 654 if (likely(urb->actual_length != 0)) { 655 skb_put(skb, urb->actual_length); 656 ath9k_hif_usb_rx_stream(hif_dev, skb); 657 } 658 659 resubmit: 660 skb_reset_tail_pointer(skb); 661 skb_trim(skb, 0); 662 663 usb_anchor_urb(urb, &hif_dev->rx_submitted); 664 ret = usb_submit_urb(urb, GFP_ATOMIC); 665 if (ret) { 666 usb_unanchor_urb(urb); 667 goto free; 668 } 669 670 return; 671 free: 672 kfree_skb(skb); 673 } 674 675 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 676 { 677 struct sk_buff *skb = (struct sk_buff *) urb->context; 678 struct sk_buff *nskb; 679 struct hif_device_usb *hif_dev = 680 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 681 int ret; 682 683 if (!skb) 684 return; 685 686 if (!hif_dev) 687 goto free; 688 689 switch (urb->status) { 690 case 0: 691 break; 692 case -ENOENT: 693 case -ECONNRESET: 694 case -ENODEV: 695 case -ESHUTDOWN: 696 goto free; 697 default: 698 skb_reset_tail_pointer(skb); 699 skb_trim(skb, 0); 700 701 goto resubmit; 702 } 703 704 if (likely(urb->actual_length != 0)) { 705 skb_put(skb, urb->actual_length); 706 707 /* Process the command first */ 708 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 709 skb->len, USB_REG_IN_PIPE); 710 711 712 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 713 if (!nskb) { 714 dev_err(&hif_dev->udev->dev, 715 "ath9k_htc: REG_IN memory allocation failure\n"); 716 urb->context = NULL; 717 return; 718 } 719 720 usb_fill_bulk_urb(urb, hif_dev->udev, 721 usb_rcvbulkpipe(hif_dev->udev, 722 USB_REG_IN_PIPE), 723 nskb->data, MAX_REG_IN_BUF_SIZE, 724 ath9k_hif_usb_reg_in_cb, nskb); 725 } 726 727 resubmit: 728 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 729 ret = usb_submit_urb(urb, GFP_ATOMIC); 730 if (ret) { 731 usb_unanchor_urb(urb); 732 goto free; 733 } 734 735 return; 736 free: 737 kfree_skb(skb); 738 urb->context = NULL; 739 } 740 741 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 742 { 743 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 744 unsigned long flags; 745 746 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 747 &hif_dev->tx.tx_buf, list) { 748 usb_kill_urb(tx_buf->urb); 749 list_del(&tx_buf->list); 750 usb_free_urb(tx_buf->urb); 751 kfree(tx_buf->buf); 752 kfree(tx_buf); 753 } 754 755 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 756 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 757 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 758 759 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 760 &hif_dev->tx.tx_pending, list) { 761 usb_kill_urb(tx_buf->urb); 762 list_del(&tx_buf->list); 763 usb_free_urb(tx_buf->urb); 764 kfree(tx_buf->buf); 765 kfree(tx_buf); 766 } 767 768 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 769 } 770 771 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 772 { 773 struct tx_buf *tx_buf; 774 int i; 775 776 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 777 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 778 spin_lock_init(&hif_dev->tx.tx_lock); 779 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 780 init_usb_anchor(&hif_dev->mgmt_submitted); 781 782 for (i = 0; i < MAX_TX_URB_NUM; i++) { 783 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 784 if (!tx_buf) 785 goto err; 786 787 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 788 if (!tx_buf->buf) 789 goto err; 790 791 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 792 if (!tx_buf->urb) 793 goto err; 794 795 tx_buf->hif_dev = hif_dev; 796 __skb_queue_head_init(&tx_buf->skb_queue); 797 798 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 799 } 800 801 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 802 803 return 0; 804 err: 805 if (tx_buf) { 806 kfree(tx_buf->buf); 807 kfree(tx_buf); 808 } 809 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 810 return -ENOMEM; 811 } 812 813 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 814 { 815 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 816 } 817 818 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 819 { 820 struct urb *urb = NULL; 821 struct sk_buff *skb = NULL; 822 int i, ret; 823 824 init_usb_anchor(&hif_dev->rx_submitted); 825 spin_lock_init(&hif_dev->rx_lock); 826 827 for (i = 0; i < MAX_RX_URB_NUM; i++) { 828 829 /* Allocate URB */ 830 urb = usb_alloc_urb(0, GFP_KERNEL); 831 if (urb == NULL) { 832 ret = -ENOMEM; 833 goto err_urb; 834 } 835 836 /* Allocate buffer */ 837 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 838 if (!skb) { 839 ret = -ENOMEM; 840 goto err_skb; 841 } 842 843 usb_fill_bulk_urb(urb, hif_dev->udev, 844 usb_rcvbulkpipe(hif_dev->udev, 845 USB_WLAN_RX_PIPE), 846 skb->data, MAX_RX_BUF_SIZE, 847 ath9k_hif_usb_rx_cb, skb); 848 849 /* Anchor URB */ 850 usb_anchor_urb(urb, &hif_dev->rx_submitted); 851 852 /* Submit URB */ 853 ret = usb_submit_urb(urb, GFP_KERNEL); 854 if (ret) { 855 usb_unanchor_urb(urb); 856 goto err_submit; 857 } 858 859 /* 860 * Drop reference count. 861 * This ensures that the URB is freed when killing them. 862 */ 863 usb_free_urb(urb); 864 } 865 866 return 0; 867 868 err_submit: 869 kfree_skb(skb); 870 err_skb: 871 usb_free_urb(urb); 872 err_urb: 873 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 874 return ret; 875 } 876 877 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 878 { 879 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 880 } 881 882 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 883 { 884 struct urb *urb = NULL; 885 struct sk_buff *skb = NULL; 886 int i, ret; 887 888 init_usb_anchor(&hif_dev->reg_in_submitted); 889 890 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 891 892 /* Allocate URB */ 893 urb = usb_alloc_urb(0, GFP_KERNEL); 894 if (urb == NULL) { 895 ret = -ENOMEM; 896 goto err_urb; 897 } 898 899 /* Allocate buffer */ 900 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 901 if (!skb) { 902 ret = -ENOMEM; 903 goto err_skb; 904 } 905 906 usb_fill_bulk_urb(urb, hif_dev->udev, 907 usb_rcvbulkpipe(hif_dev->udev, 908 USB_REG_IN_PIPE), 909 skb->data, MAX_REG_IN_BUF_SIZE, 910 ath9k_hif_usb_reg_in_cb, skb); 911 912 /* Anchor URB */ 913 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 914 915 /* Submit URB */ 916 ret = usb_submit_urb(urb, GFP_KERNEL); 917 if (ret) { 918 usb_unanchor_urb(urb); 919 goto err_submit; 920 } 921 922 /* 923 * Drop reference count. 924 * This ensures that the URB is freed when killing them. 925 */ 926 usb_free_urb(urb); 927 } 928 929 return 0; 930 931 err_submit: 932 kfree_skb(skb); 933 err_skb: 934 usb_free_urb(urb); 935 err_urb: 936 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 937 return ret; 938 } 939 940 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 941 { 942 /* Register Write */ 943 init_usb_anchor(&hif_dev->regout_submitted); 944 945 /* TX */ 946 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 947 goto err; 948 949 /* RX */ 950 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 951 goto err_rx; 952 953 /* Register Read */ 954 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 955 goto err_reg; 956 957 return 0; 958 err_reg: 959 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 960 err_rx: 961 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 962 err: 963 return -ENOMEM; 964 } 965 966 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 967 { 968 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 969 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 970 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 971 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 972 } 973 974 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 975 { 976 int transfer, err; 977 const void *data = hif_dev->fw_data; 978 size_t len = hif_dev->fw_size; 979 u32 addr = AR9271_FIRMWARE; 980 u8 *buf = kzalloc(4096, GFP_KERNEL); 981 u32 firm_offset; 982 983 if (!buf) 984 return -ENOMEM; 985 986 while (len) { 987 transfer = min_t(size_t, len, 4096); 988 memcpy(buf, data, transfer); 989 990 err = usb_control_msg(hif_dev->udev, 991 usb_sndctrlpipe(hif_dev->udev, 0), 992 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 993 addr >> 8, 0, buf, transfer, HZ); 994 if (err < 0) { 995 kfree(buf); 996 return err; 997 } 998 999 len -= transfer; 1000 data += transfer; 1001 addr += transfer; 1002 } 1003 kfree(buf); 1004 1005 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1006 firm_offset = AR7010_FIRMWARE_TEXT; 1007 else 1008 firm_offset = AR9271_FIRMWARE_TEXT; 1009 1010 /* 1011 * Issue FW download complete command to firmware. 1012 */ 1013 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1014 FIRMWARE_DOWNLOAD_COMP, 1015 0x40 | USB_DIR_OUT, 1016 firm_offset >> 8, 0, NULL, 0, HZ); 1017 if (err) 1018 return -EIO; 1019 1020 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1021 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1022 1023 return 0; 1024 } 1025 1026 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1027 { 1028 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0]; 1029 struct usb_endpoint_descriptor *endp; 1030 int ret, idx; 1031 1032 ret = ath9k_hif_usb_download_fw(hif_dev); 1033 if (ret) { 1034 dev_err(&hif_dev->udev->dev, 1035 "ath9k_htc: Firmware - %s download failed\n", 1036 hif_dev->fw_name); 1037 return ret; 1038 } 1039 1040 /* On downloading the firmware to the target, the USB descriptor of EP4 1041 * is 'patched' to change the type of the endpoint to Bulk. This will 1042 * bring down CPU usage during the scan period. 1043 */ 1044 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) { 1045 endp = &alt->endpoint[idx].desc; 1046 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 1047 == USB_ENDPOINT_XFER_INT) { 1048 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK; 1049 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK; 1050 endp->bInterval = 0; 1051 } 1052 } 1053 1054 /* Alloc URBs */ 1055 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1056 if (ret) { 1057 dev_err(&hif_dev->udev->dev, 1058 "ath9k_htc: Unable to allocate URBs\n"); 1059 return ret; 1060 } 1061 1062 return 0; 1063 } 1064 1065 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1066 { 1067 ath9k_hif_usb_dealloc_urbs(hif_dev); 1068 } 1069 1070 /* 1071 * If initialization fails or the FW cannot be retrieved, 1072 * detach the device. 1073 */ 1074 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1075 { 1076 struct device *dev = &hif_dev->udev->dev; 1077 struct device *parent = dev->parent; 1078 1079 complete(&hif_dev->fw_done); 1080 1081 if (parent) 1082 device_lock(parent); 1083 1084 device_release_driver(dev); 1085 1086 if (parent) 1087 device_unlock(parent); 1088 } 1089 1090 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1091 { 1092 struct hif_device_usb *hif_dev = context; 1093 int ret; 1094 1095 if (!fw) { 1096 dev_err(&hif_dev->udev->dev, 1097 "ath9k_htc: Failed to get firmware %s\n", 1098 hif_dev->fw_name); 1099 goto err_fw; 1100 } 1101 1102 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1103 &hif_dev->udev->dev); 1104 if (hif_dev->htc_handle == NULL) 1105 goto err_dev_alloc; 1106 1107 hif_dev->fw_data = fw->data; 1108 hif_dev->fw_size = fw->size; 1109 1110 /* Proceed with initialization */ 1111 1112 ret = ath9k_hif_usb_dev_init(hif_dev); 1113 if (ret) 1114 goto err_dev_init; 1115 1116 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1117 &hif_dev->interface->dev, 1118 hif_dev->usb_device_id->idProduct, 1119 hif_dev->udev->product, 1120 hif_dev->usb_device_id->driver_info); 1121 if (ret) { 1122 ret = -EINVAL; 1123 goto err_htc_hw_init; 1124 } 1125 1126 release_firmware(fw); 1127 hif_dev->flags |= HIF_USB_READY; 1128 complete(&hif_dev->fw_done); 1129 1130 return; 1131 1132 err_htc_hw_init: 1133 ath9k_hif_usb_dev_deinit(hif_dev); 1134 err_dev_init: 1135 ath9k_htc_hw_free(hif_dev->htc_handle); 1136 err_dev_alloc: 1137 release_firmware(fw); 1138 err_fw: 1139 ath9k_hif_usb_firmware_fail(hif_dev); 1140 } 1141 1142 /* 1143 * An exact copy of the function from zd1211rw. 1144 */ 1145 static int send_eject_command(struct usb_interface *interface) 1146 { 1147 struct usb_device *udev = interface_to_usbdev(interface); 1148 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1149 struct usb_endpoint_descriptor *endpoint; 1150 unsigned char *cmd; 1151 u8 bulk_out_ep; 1152 int r; 1153 1154 /* Find bulk out endpoint */ 1155 for (r = 1; r >= 0; r--) { 1156 endpoint = &iface_desc->endpoint[r].desc; 1157 if (usb_endpoint_dir_out(endpoint) && 1158 usb_endpoint_xfer_bulk(endpoint)) { 1159 bulk_out_ep = endpoint->bEndpointAddress; 1160 break; 1161 } 1162 } 1163 if (r == -1) { 1164 dev_err(&udev->dev, 1165 "ath9k_htc: Could not find bulk out endpoint\n"); 1166 return -ENODEV; 1167 } 1168 1169 cmd = kzalloc(31, GFP_KERNEL); 1170 if (cmd == NULL) 1171 return -ENODEV; 1172 1173 /* USB bulk command block */ 1174 cmd[0] = 0x55; /* bulk command signature */ 1175 cmd[1] = 0x53; /* bulk command signature */ 1176 cmd[2] = 0x42; /* bulk command signature */ 1177 cmd[3] = 0x43; /* bulk command signature */ 1178 cmd[14] = 6; /* command length */ 1179 1180 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1181 cmd[19] = 0x2; /* eject disc */ 1182 1183 dev_info(&udev->dev, "Ejecting storage device...\n"); 1184 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1185 cmd, 31, NULL, 2000); 1186 kfree(cmd); 1187 if (r) 1188 return r; 1189 1190 /* At this point, the device disconnects and reconnects with the real 1191 * ID numbers. */ 1192 1193 usb_set_intfdata(interface, NULL); 1194 return 0; 1195 } 1196 1197 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1198 const struct usb_device_id *id) 1199 { 1200 struct usb_device *udev = interface_to_usbdev(interface); 1201 struct hif_device_usb *hif_dev; 1202 int ret = 0; 1203 1204 if (id->driver_info == STORAGE_DEVICE) 1205 return send_eject_command(interface); 1206 1207 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1208 if (!hif_dev) { 1209 ret = -ENOMEM; 1210 goto err_alloc; 1211 } 1212 1213 usb_get_dev(udev); 1214 1215 hif_dev->udev = udev; 1216 hif_dev->interface = interface; 1217 hif_dev->usb_device_id = id; 1218 #ifdef CONFIG_PM 1219 udev->reset_resume = 1; 1220 #endif 1221 usb_set_intfdata(interface, hif_dev); 1222 1223 init_completion(&hif_dev->fw_done); 1224 1225 /* Find out which firmware to load */ 1226 1227 if (IS_AR7010_DEVICE(id->driver_info)) 1228 hif_dev->fw_name = FIRMWARE_AR7010_1_1; 1229 else 1230 hif_dev->fw_name = FIRMWARE_AR9271; 1231 1232 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1233 &hif_dev->udev->dev, GFP_KERNEL, 1234 hif_dev, ath9k_hif_usb_firmware_cb); 1235 if (ret) { 1236 dev_err(&hif_dev->udev->dev, 1237 "ath9k_htc: Async request for firmware %s failed\n", 1238 hif_dev->fw_name); 1239 goto err_fw_req; 1240 } 1241 1242 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1243 hif_dev->fw_name); 1244 1245 return 0; 1246 1247 err_fw_req: 1248 usb_set_intfdata(interface, NULL); 1249 kfree(hif_dev); 1250 usb_put_dev(udev); 1251 err_alloc: 1252 return ret; 1253 } 1254 1255 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1256 { 1257 u32 reboot_cmd = 0xffffffff; 1258 void *buf; 1259 int ret; 1260 1261 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1262 if (!buf) 1263 return; 1264 1265 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE), 1266 buf, 4, NULL, HZ); 1267 if (ret) 1268 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1269 1270 kfree(buf); 1271 } 1272 1273 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1274 { 1275 struct usb_device *udev = interface_to_usbdev(interface); 1276 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1277 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1278 1279 if (!hif_dev) 1280 return; 1281 1282 wait_for_completion(&hif_dev->fw_done); 1283 1284 if (hif_dev->flags & HIF_USB_READY) { 1285 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1286 ath9k_htc_hw_free(hif_dev->htc_handle); 1287 ath9k_hif_usb_dev_deinit(hif_dev); 1288 } 1289 1290 usb_set_intfdata(interface, NULL); 1291 1292 if (!unplugged && (hif_dev->flags & HIF_USB_START)) 1293 ath9k_hif_usb_reboot(udev); 1294 1295 kfree(hif_dev); 1296 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1297 usb_put_dev(udev); 1298 } 1299 1300 #ifdef CONFIG_PM 1301 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1302 pm_message_t message) 1303 { 1304 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1305 1306 /* 1307 * The device has to be set to FULLSLEEP mode in case no 1308 * interface is up. 1309 */ 1310 if (!(hif_dev->flags & HIF_USB_START)) 1311 ath9k_htc_suspend(hif_dev->htc_handle); 1312 1313 ath9k_hif_usb_dealloc_urbs(hif_dev); 1314 1315 return 0; 1316 } 1317 1318 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1319 { 1320 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1321 struct htc_target *htc_handle = hif_dev->htc_handle; 1322 int ret; 1323 const struct firmware *fw; 1324 1325 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1326 if (ret) 1327 return ret; 1328 1329 if (hif_dev->flags & HIF_USB_READY) { 1330 /* request cached firmware during suspend/resume cycle */ 1331 ret = request_firmware(&fw, hif_dev->fw_name, 1332 &hif_dev->udev->dev); 1333 if (ret) 1334 goto fail_resume; 1335 1336 hif_dev->fw_data = fw->data; 1337 hif_dev->fw_size = fw->size; 1338 ret = ath9k_hif_usb_download_fw(hif_dev); 1339 release_firmware(fw); 1340 if (ret) 1341 goto fail_resume; 1342 } else { 1343 ath9k_hif_usb_dealloc_urbs(hif_dev); 1344 return -EIO; 1345 } 1346 1347 mdelay(100); 1348 1349 ret = ath9k_htc_resume(htc_handle); 1350 1351 if (ret) 1352 goto fail_resume; 1353 1354 return 0; 1355 1356 fail_resume: 1357 ath9k_hif_usb_dealloc_urbs(hif_dev); 1358 1359 return ret; 1360 } 1361 #endif 1362 1363 static struct usb_driver ath9k_hif_usb_driver = { 1364 .name = KBUILD_MODNAME, 1365 .probe = ath9k_hif_usb_probe, 1366 .disconnect = ath9k_hif_usb_disconnect, 1367 #ifdef CONFIG_PM 1368 .suspend = ath9k_hif_usb_suspend, 1369 .resume = ath9k_hif_usb_resume, 1370 .reset_resume = ath9k_hif_usb_resume, 1371 #endif 1372 .id_table = ath9k_hif_usb_ids, 1373 .soft_unbind = 1, 1374 .disable_hub_initiated_lpm = 1, 1375 }; 1376 1377 int ath9k_hif_usb_init(void) 1378 { 1379 return usb_register(&ath9k_hif_usb_driver); 1380 } 1381 1382 void ath9k_hif_usb_exit(void) 1383 { 1384 usb_deregister(&ath9k_hif_usb_driver); 1385 } 1386