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(0x0411, 0x0197), 58 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */ 59 { USB_DEVICE(0x04da, 0x3904), 60 .driver_info = AR9280_USB }, 61 62 { USB_DEVICE(0x0cf3, 0x20ff), 63 .driver_info = STORAGE_DEVICE }, 64 65 { }, 66 }; 67 68 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); 69 70 static int __hif_usb_tx(struct hif_device_usb *hif_dev); 71 72 static void hif_usb_regout_cb(struct urb *urb) 73 { 74 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 75 76 switch (urb->status) { 77 case 0: 78 break; 79 case -ENOENT: 80 case -ECONNRESET: 81 case -ENODEV: 82 case -ESHUTDOWN: 83 goto free; 84 default: 85 break; 86 } 87 88 if (cmd) { 89 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 90 cmd->skb, true); 91 kfree(cmd); 92 } 93 94 return; 95 free: 96 kfree_skb(cmd->skb); 97 kfree(cmd); 98 } 99 100 static int hif_usb_send_regout(struct hif_device_usb *hif_dev, 101 struct sk_buff *skb) 102 { 103 struct urb *urb; 104 struct cmd_buf *cmd; 105 int ret = 0; 106 107 urb = usb_alloc_urb(0, GFP_KERNEL); 108 if (urb == NULL) 109 return -ENOMEM; 110 111 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 112 if (cmd == NULL) { 113 usb_free_urb(urb); 114 return -ENOMEM; 115 } 116 117 cmd->skb = skb; 118 cmd->hif_dev = hif_dev; 119 120 usb_fill_int_urb(urb, hif_dev->udev, 121 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE), 122 skb->data, skb->len, 123 hif_usb_regout_cb, cmd, 1); 124 125 usb_anchor_urb(urb, &hif_dev->regout_submitted); 126 ret = usb_submit_urb(urb, GFP_KERNEL); 127 if (ret) { 128 usb_unanchor_urb(urb); 129 kfree(cmd); 130 } 131 usb_free_urb(urb); 132 133 return ret; 134 } 135 136 static void hif_usb_mgmt_cb(struct urb *urb) 137 { 138 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 139 struct hif_device_usb *hif_dev; 140 bool txok = true; 141 142 if (!cmd || !cmd->skb || !cmd->hif_dev) 143 return; 144 145 hif_dev = cmd->hif_dev; 146 147 switch (urb->status) { 148 case 0: 149 break; 150 case -ENOENT: 151 case -ECONNRESET: 152 case -ENODEV: 153 case -ESHUTDOWN: 154 txok = false; 155 156 /* 157 * If the URBs are being flushed, no need to complete 158 * this packet. 159 */ 160 spin_lock(&hif_dev->tx.tx_lock); 161 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 162 spin_unlock(&hif_dev->tx.tx_lock); 163 dev_kfree_skb_any(cmd->skb); 164 kfree(cmd); 165 return; 166 } 167 spin_unlock(&hif_dev->tx.tx_lock); 168 169 break; 170 default: 171 txok = false; 172 break; 173 } 174 175 skb_pull(cmd->skb, 4); 176 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 177 cmd->skb, txok); 178 kfree(cmd); 179 } 180 181 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 182 struct sk_buff *skb) 183 { 184 struct urb *urb; 185 struct cmd_buf *cmd; 186 int ret = 0; 187 __le16 *hdr; 188 189 urb = usb_alloc_urb(0, GFP_ATOMIC); 190 if (urb == NULL) 191 return -ENOMEM; 192 193 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 194 if (cmd == NULL) { 195 usb_free_urb(urb); 196 return -ENOMEM; 197 } 198 199 cmd->skb = skb; 200 cmd->hif_dev = hif_dev; 201 202 hdr = (__le16 *) skb_push(skb, 4); 203 *hdr++ = cpu_to_le16(skb->len - 4); 204 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 205 206 usb_fill_bulk_urb(urb, hif_dev->udev, 207 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 208 skb->data, skb->len, 209 hif_usb_mgmt_cb, cmd); 210 211 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 212 ret = usb_submit_urb(urb, GFP_ATOMIC); 213 if (ret) { 214 usb_unanchor_urb(urb); 215 kfree(cmd); 216 } 217 usb_free_urb(urb); 218 219 return ret; 220 } 221 222 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 223 struct sk_buff_head *list) 224 { 225 struct sk_buff *skb; 226 227 while ((skb = __skb_dequeue(list)) != NULL) { 228 dev_kfree_skb_any(skb); 229 } 230 } 231 232 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 233 struct sk_buff_head *queue, 234 bool txok) 235 { 236 struct sk_buff *skb; 237 238 while ((skb = __skb_dequeue(queue)) != NULL) { 239 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 240 int ln = skb->len; 241 #endif 242 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 243 skb, txok); 244 if (txok) { 245 TX_STAT_INC(skb_success); 246 TX_STAT_ADD(skb_success_bytes, ln); 247 } 248 else 249 TX_STAT_INC(skb_failed); 250 } 251 } 252 253 static void hif_usb_tx_cb(struct urb *urb) 254 { 255 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 256 struct hif_device_usb *hif_dev; 257 bool txok = true; 258 259 if (!tx_buf || !tx_buf->hif_dev) 260 return; 261 262 hif_dev = tx_buf->hif_dev; 263 264 switch (urb->status) { 265 case 0: 266 break; 267 case -ENOENT: 268 case -ECONNRESET: 269 case -ENODEV: 270 case -ESHUTDOWN: 271 txok = false; 272 273 /* 274 * If the URBs are being flushed, no need to add this 275 * URB to the free list. 276 */ 277 spin_lock(&hif_dev->tx.tx_lock); 278 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 279 spin_unlock(&hif_dev->tx.tx_lock); 280 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 281 return; 282 } 283 spin_unlock(&hif_dev->tx.tx_lock); 284 285 break; 286 default: 287 txok = false; 288 break; 289 } 290 291 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 292 293 /* Re-initialize the SKB queue */ 294 tx_buf->len = tx_buf->offset = 0; 295 __skb_queue_head_init(&tx_buf->skb_queue); 296 297 /* Add this TX buffer to the free list */ 298 spin_lock(&hif_dev->tx.tx_lock); 299 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 300 hif_dev->tx.tx_buf_cnt++; 301 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 302 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 303 TX_STAT_INC(buf_completed); 304 spin_unlock(&hif_dev->tx.tx_lock); 305 } 306 307 /* TX lock has to be taken */ 308 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 309 { 310 struct tx_buf *tx_buf = NULL; 311 struct sk_buff *nskb = NULL; 312 int ret = 0, i; 313 u16 tx_skb_cnt = 0; 314 u8 *buf; 315 __le16 *hdr; 316 317 if (hif_dev->tx.tx_skb_cnt == 0) 318 return 0; 319 320 /* Check if a free TX buffer is available */ 321 if (list_empty(&hif_dev->tx.tx_buf)) 322 return 0; 323 324 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 325 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 326 hif_dev->tx.tx_buf_cnt--; 327 328 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 329 330 for (i = 0; i < tx_skb_cnt; i++) { 331 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 332 333 /* Should never be NULL */ 334 BUG_ON(!nskb); 335 336 hif_dev->tx.tx_skb_cnt--; 337 338 buf = tx_buf->buf; 339 buf += tx_buf->offset; 340 hdr = (__le16 *)buf; 341 *hdr++ = cpu_to_le16(nskb->len); 342 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 343 buf += 4; 344 memcpy(buf, nskb->data, nskb->len); 345 tx_buf->len = nskb->len + 4; 346 347 if (i < (tx_skb_cnt - 1)) 348 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 349 350 if (i == (tx_skb_cnt - 1)) 351 tx_buf->len += tx_buf->offset; 352 353 __skb_queue_tail(&tx_buf->skb_queue, nskb); 354 TX_STAT_INC(skb_queued); 355 } 356 357 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 358 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 359 tx_buf->buf, tx_buf->len, 360 hif_usb_tx_cb, tx_buf); 361 362 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 363 if (ret) { 364 tx_buf->len = tx_buf->offset = 0; 365 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 366 __skb_queue_head_init(&tx_buf->skb_queue); 367 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 368 hif_dev->tx.tx_buf_cnt++; 369 } 370 371 if (!ret) 372 TX_STAT_INC(buf_queued); 373 374 return ret; 375 } 376 377 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 378 { 379 struct ath9k_htc_tx_ctl *tx_ctl; 380 unsigned long flags; 381 int ret = 0; 382 383 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 384 385 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 386 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 387 return -ENODEV; 388 } 389 390 /* Check if the max queue count has been reached */ 391 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 392 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 393 return -ENOMEM; 394 } 395 396 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 397 398 tx_ctl = HTC_SKB_CB(skb); 399 400 /* Mgmt/Beacon frames don't use the TX buffer pool */ 401 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 402 (tx_ctl->type == ATH9K_HTC_BEACON)) { 403 ret = hif_usb_send_mgmt(hif_dev, skb); 404 } 405 406 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 407 408 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 409 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 410 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 411 hif_dev->tx.tx_skb_cnt++; 412 } 413 414 /* Check if AMPDUs have to be sent immediately */ 415 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 416 (hif_dev->tx.tx_skb_cnt < 2)) { 417 __hif_usb_tx(hif_dev); 418 } 419 420 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 421 422 return ret; 423 } 424 425 static void hif_usb_start(void *hif_handle) 426 { 427 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 428 unsigned long flags; 429 430 hif_dev->flags |= HIF_USB_START; 431 432 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 433 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 434 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 435 } 436 437 static void hif_usb_stop(void *hif_handle) 438 { 439 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 440 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 441 unsigned long flags; 442 443 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 444 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 445 hif_dev->tx.tx_skb_cnt = 0; 446 hif_dev->tx.flags |= HIF_USB_TX_STOP; 447 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 448 449 /* The pending URBs have to be canceled. */ 450 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 451 &hif_dev->tx.tx_pending, list) { 452 usb_kill_urb(tx_buf->urb); 453 } 454 455 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 456 } 457 458 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 459 { 460 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 461 int ret = 0; 462 463 switch (pipe_id) { 464 case USB_WLAN_TX_PIPE: 465 ret = hif_usb_send_tx(hif_dev, skb); 466 break; 467 case USB_REG_OUT_PIPE: 468 ret = hif_usb_send_regout(hif_dev, skb); 469 break; 470 default: 471 dev_err(&hif_dev->udev->dev, 472 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 473 ret = -EINVAL; 474 break; 475 } 476 477 return ret; 478 } 479 480 static inline bool check_index(struct sk_buff *skb, u8 idx) 481 { 482 struct ath9k_htc_tx_ctl *tx_ctl; 483 484 tx_ctl = HTC_SKB_CB(skb); 485 486 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 487 (tx_ctl->sta_idx == idx)) 488 return true; 489 490 return false; 491 } 492 493 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 494 { 495 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 496 struct sk_buff *skb, *tmp; 497 unsigned long flags; 498 499 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 500 501 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 502 if (check_index(skb, idx)) { 503 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 504 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 505 skb, false); 506 hif_dev->tx.tx_skb_cnt--; 507 TX_STAT_INC(skb_failed); 508 } 509 } 510 511 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 512 } 513 514 static struct ath9k_htc_hif hif_usb = { 515 .transport = ATH9K_HIF_USB, 516 .name = "ath9k_hif_usb", 517 518 .control_ul_pipe = USB_REG_OUT_PIPE, 519 .control_dl_pipe = USB_REG_IN_PIPE, 520 521 .start = hif_usb_start, 522 .stop = hif_usb_stop, 523 .sta_drain = hif_usb_sta_drain, 524 .send = hif_usb_send, 525 }; 526 527 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 528 struct sk_buff *skb) 529 { 530 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 531 int index = 0, i = 0, len = skb->len; 532 int rx_remain_len, rx_pkt_len; 533 u16 pool_index = 0; 534 u8 *ptr; 535 536 spin_lock(&hif_dev->rx_lock); 537 538 rx_remain_len = hif_dev->rx_remain_len; 539 rx_pkt_len = hif_dev->rx_transfer_len; 540 541 if (rx_remain_len != 0) { 542 struct sk_buff *remain_skb = hif_dev->remain_skb; 543 544 if (remain_skb) { 545 ptr = (u8 *) remain_skb->data; 546 547 index = rx_remain_len; 548 rx_remain_len -= hif_dev->rx_pad_len; 549 ptr += rx_pkt_len; 550 551 memcpy(ptr, skb->data, rx_remain_len); 552 553 rx_pkt_len += rx_remain_len; 554 hif_dev->rx_remain_len = 0; 555 skb_put(remain_skb, rx_pkt_len); 556 557 skb_pool[pool_index++] = remain_skb; 558 559 } else { 560 index = rx_remain_len; 561 } 562 } 563 564 spin_unlock(&hif_dev->rx_lock); 565 566 while (index < len) { 567 u16 pkt_len; 568 u16 pkt_tag; 569 u16 pad_len; 570 int chk_idx; 571 572 ptr = (u8 *) skb->data; 573 574 pkt_len = get_unaligned_le16(ptr + index); 575 pkt_tag = get_unaligned_le16(ptr + index + 2); 576 577 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 578 RX_STAT_INC(skb_dropped); 579 return; 580 } 581 582 pad_len = 4 - (pkt_len & 0x3); 583 if (pad_len == 4) 584 pad_len = 0; 585 586 chk_idx = index; 587 index = index + 4 + pkt_len + pad_len; 588 589 if (index > MAX_RX_BUF_SIZE) { 590 spin_lock(&hif_dev->rx_lock); 591 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 592 hif_dev->rx_transfer_len = 593 MAX_RX_BUF_SIZE - chk_idx - 4; 594 hif_dev->rx_pad_len = pad_len; 595 596 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 597 if (!nskb) { 598 dev_err(&hif_dev->udev->dev, 599 "ath9k_htc: RX memory allocation error\n"); 600 spin_unlock(&hif_dev->rx_lock); 601 goto err; 602 } 603 skb_reserve(nskb, 32); 604 RX_STAT_INC(skb_allocated); 605 606 memcpy(nskb->data, &(skb->data[chk_idx+4]), 607 hif_dev->rx_transfer_len); 608 609 /* Record the buffer pointer */ 610 hif_dev->remain_skb = nskb; 611 spin_unlock(&hif_dev->rx_lock); 612 } else { 613 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 614 if (!nskb) { 615 dev_err(&hif_dev->udev->dev, 616 "ath9k_htc: RX memory allocation error\n"); 617 goto err; 618 } 619 skb_reserve(nskb, 32); 620 RX_STAT_INC(skb_allocated); 621 622 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 623 skb_put(nskb, pkt_len); 624 skb_pool[pool_index++] = nskb; 625 } 626 } 627 628 err: 629 for (i = 0; i < pool_index; i++) { 630 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 631 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 632 skb_pool[i]->len, USB_WLAN_RX_PIPE); 633 RX_STAT_INC(skb_completed); 634 } 635 } 636 637 static void ath9k_hif_usb_rx_cb(struct urb *urb) 638 { 639 struct sk_buff *skb = (struct sk_buff *) urb->context; 640 struct hif_device_usb *hif_dev = 641 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 642 int ret; 643 644 if (!skb) 645 return; 646 647 if (!hif_dev) 648 goto free; 649 650 switch (urb->status) { 651 case 0: 652 break; 653 case -ENOENT: 654 case -ECONNRESET: 655 case -ENODEV: 656 case -ESHUTDOWN: 657 goto free; 658 default: 659 goto resubmit; 660 } 661 662 if (likely(urb->actual_length != 0)) { 663 skb_put(skb, urb->actual_length); 664 ath9k_hif_usb_rx_stream(hif_dev, skb); 665 } 666 667 resubmit: 668 skb_reset_tail_pointer(skb); 669 skb_trim(skb, 0); 670 671 usb_anchor_urb(urb, &hif_dev->rx_submitted); 672 ret = usb_submit_urb(urb, GFP_ATOMIC); 673 if (ret) { 674 usb_unanchor_urb(urb); 675 goto free; 676 } 677 678 return; 679 free: 680 kfree_skb(skb); 681 } 682 683 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 684 { 685 struct sk_buff *skb = (struct sk_buff *) urb->context; 686 struct sk_buff *nskb; 687 struct hif_device_usb *hif_dev = 688 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 689 int ret; 690 691 if (!skb) 692 return; 693 694 if (!hif_dev) 695 goto free; 696 697 switch (urb->status) { 698 case 0: 699 break; 700 case -ENOENT: 701 case -ECONNRESET: 702 case -ENODEV: 703 case -ESHUTDOWN: 704 goto free; 705 default: 706 skb_reset_tail_pointer(skb); 707 skb_trim(skb, 0); 708 709 goto resubmit; 710 } 711 712 if (likely(urb->actual_length != 0)) { 713 skb_put(skb, urb->actual_length); 714 715 /* Process the command first */ 716 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 717 skb->len, USB_REG_IN_PIPE); 718 719 720 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 721 if (!nskb) { 722 dev_err(&hif_dev->udev->dev, 723 "ath9k_htc: REG_IN memory allocation failure\n"); 724 urb->context = NULL; 725 return; 726 } 727 728 usb_fill_int_urb(urb, hif_dev->udev, 729 usb_rcvintpipe(hif_dev->udev, 730 USB_REG_IN_PIPE), 731 nskb->data, MAX_REG_IN_BUF_SIZE, 732 ath9k_hif_usb_reg_in_cb, nskb, 1); 733 } 734 735 resubmit: 736 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 737 ret = usb_submit_urb(urb, GFP_ATOMIC); 738 if (ret) { 739 usb_unanchor_urb(urb); 740 goto free; 741 } 742 743 return; 744 free: 745 kfree_skb(skb); 746 urb->context = NULL; 747 } 748 749 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 750 { 751 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 752 unsigned long flags; 753 754 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 755 &hif_dev->tx.tx_buf, list) { 756 usb_kill_urb(tx_buf->urb); 757 list_del(&tx_buf->list); 758 usb_free_urb(tx_buf->urb); 759 kfree(tx_buf->buf); 760 kfree(tx_buf); 761 } 762 763 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 764 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 765 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 766 767 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 768 &hif_dev->tx.tx_pending, list) { 769 usb_kill_urb(tx_buf->urb); 770 list_del(&tx_buf->list); 771 usb_free_urb(tx_buf->urb); 772 kfree(tx_buf->buf); 773 kfree(tx_buf); 774 } 775 776 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 777 } 778 779 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 780 { 781 struct tx_buf *tx_buf; 782 int i; 783 784 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 785 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 786 spin_lock_init(&hif_dev->tx.tx_lock); 787 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 788 init_usb_anchor(&hif_dev->mgmt_submitted); 789 790 for (i = 0; i < MAX_TX_URB_NUM; i++) { 791 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 792 if (!tx_buf) 793 goto err; 794 795 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 796 if (!tx_buf->buf) 797 goto err; 798 799 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 800 if (!tx_buf->urb) 801 goto err; 802 803 tx_buf->hif_dev = hif_dev; 804 __skb_queue_head_init(&tx_buf->skb_queue); 805 806 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 807 } 808 809 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 810 811 return 0; 812 err: 813 if (tx_buf) { 814 kfree(tx_buf->buf); 815 kfree(tx_buf); 816 } 817 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 818 return -ENOMEM; 819 } 820 821 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 822 { 823 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 824 } 825 826 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 827 { 828 struct urb *urb = NULL; 829 struct sk_buff *skb = NULL; 830 int i, ret; 831 832 init_usb_anchor(&hif_dev->rx_submitted); 833 spin_lock_init(&hif_dev->rx_lock); 834 835 for (i = 0; i < MAX_RX_URB_NUM; i++) { 836 837 /* Allocate URB */ 838 urb = usb_alloc_urb(0, GFP_KERNEL); 839 if (urb == NULL) { 840 ret = -ENOMEM; 841 goto err_urb; 842 } 843 844 /* Allocate buffer */ 845 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 846 if (!skb) { 847 ret = -ENOMEM; 848 goto err_skb; 849 } 850 851 usb_fill_bulk_urb(urb, hif_dev->udev, 852 usb_rcvbulkpipe(hif_dev->udev, 853 USB_WLAN_RX_PIPE), 854 skb->data, MAX_RX_BUF_SIZE, 855 ath9k_hif_usb_rx_cb, skb); 856 857 /* Anchor URB */ 858 usb_anchor_urb(urb, &hif_dev->rx_submitted); 859 860 /* Submit URB */ 861 ret = usb_submit_urb(urb, GFP_KERNEL); 862 if (ret) { 863 usb_unanchor_urb(urb); 864 goto err_submit; 865 } 866 867 /* 868 * Drop reference count. 869 * This ensures that the URB is freed when killing them. 870 */ 871 usb_free_urb(urb); 872 } 873 874 return 0; 875 876 err_submit: 877 kfree_skb(skb); 878 err_skb: 879 usb_free_urb(urb); 880 err_urb: 881 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 882 return ret; 883 } 884 885 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 886 { 887 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 888 } 889 890 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 891 { 892 struct urb *urb = NULL; 893 struct sk_buff *skb = NULL; 894 int i, ret; 895 896 init_usb_anchor(&hif_dev->reg_in_submitted); 897 898 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 899 900 /* Allocate URB */ 901 urb = usb_alloc_urb(0, GFP_KERNEL); 902 if (urb == NULL) { 903 ret = -ENOMEM; 904 goto err_urb; 905 } 906 907 /* Allocate buffer */ 908 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 909 if (!skb) { 910 ret = -ENOMEM; 911 goto err_skb; 912 } 913 914 usb_fill_int_urb(urb, hif_dev->udev, 915 usb_rcvintpipe(hif_dev->udev, 916 USB_REG_IN_PIPE), 917 skb->data, MAX_REG_IN_BUF_SIZE, 918 ath9k_hif_usb_reg_in_cb, skb, 1); 919 920 /* Anchor URB */ 921 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 922 923 /* Submit URB */ 924 ret = usb_submit_urb(urb, GFP_KERNEL); 925 if (ret) { 926 usb_unanchor_urb(urb); 927 goto err_submit; 928 } 929 930 /* 931 * Drop reference count. 932 * This ensures that the URB is freed when killing them. 933 */ 934 usb_free_urb(urb); 935 } 936 937 return 0; 938 939 err_submit: 940 kfree_skb(skb); 941 err_skb: 942 usb_free_urb(urb); 943 err_urb: 944 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 945 return ret; 946 } 947 948 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 949 { 950 /* Register Write */ 951 init_usb_anchor(&hif_dev->regout_submitted); 952 953 /* TX */ 954 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 955 goto err; 956 957 /* RX */ 958 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 959 goto err_rx; 960 961 /* Register Read */ 962 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 963 goto err_reg; 964 965 return 0; 966 err_reg: 967 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 968 err_rx: 969 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 970 err: 971 return -ENOMEM; 972 } 973 974 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 975 { 976 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 977 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 978 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 979 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 980 } 981 982 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 983 { 984 int transfer, err; 985 const void *data = hif_dev->fw_data; 986 size_t len = hif_dev->fw_size; 987 u32 addr = AR9271_FIRMWARE; 988 u8 *buf = kzalloc(4096, GFP_KERNEL); 989 u32 firm_offset; 990 991 if (!buf) 992 return -ENOMEM; 993 994 while (len) { 995 transfer = min_t(size_t, len, 4096); 996 memcpy(buf, data, transfer); 997 998 err = usb_control_msg(hif_dev->udev, 999 usb_sndctrlpipe(hif_dev->udev, 0), 1000 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1001 addr >> 8, 0, buf, transfer, HZ); 1002 if (err < 0) { 1003 kfree(buf); 1004 return err; 1005 } 1006 1007 len -= transfer; 1008 data += transfer; 1009 addr += transfer; 1010 } 1011 kfree(buf); 1012 1013 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1014 firm_offset = AR7010_FIRMWARE_TEXT; 1015 else 1016 firm_offset = AR9271_FIRMWARE_TEXT; 1017 1018 /* 1019 * Issue FW download complete command to firmware. 1020 */ 1021 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1022 FIRMWARE_DOWNLOAD_COMP, 1023 0x40 | USB_DIR_OUT, 1024 firm_offset >> 8, 0, NULL, 0, HZ); 1025 if (err) 1026 return -EIO; 1027 1028 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1029 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1030 1031 return 0; 1032 } 1033 1034 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1035 { 1036 int ret; 1037 1038 ret = ath9k_hif_usb_download_fw(hif_dev); 1039 if (ret) { 1040 dev_err(&hif_dev->udev->dev, 1041 "ath9k_htc: Firmware - %s download failed\n", 1042 hif_dev->fw_name); 1043 return ret; 1044 } 1045 1046 /* Alloc URBs */ 1047 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1048 if (ret) { 1049 dev_err(&hif_dev->udev->dev, 1050 "ath9k_htc: Unable to allocate URBs\n"); 1051 return ret; 1052 } 1053 1054 return 0; 1055 } 1056 1057 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1058 { 1059 ath9k_hif_usb_dealloc_urbs(hif_dev); 1060 } 1061 1062 /* 1063 * If initialization fails or the FW cannot be retrieved, 1064 * detach the device. 1065 */ 1066 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1067 { 1068 struct device *dev = &hif_dev->udev->dev; 1069 struct device *parent = dev->parent; 1070 1071 complete_all(&hif_dev->fw_done); 1072 1073 if (parent) 1074 device_lock(parent); 1075 1076 device_release_driver(dev); 1077 1078 if (parent) 1079 device_unlock(parent); 1080 } 1081 1082 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1083 { 1084 struct hif_device_usb *hif_dev = context; 1085 int ret; 1086 1087 if (!fw) { 1088 dev_err(&hif_dev->udev->dev, 1089 "ath9k_htc: Failed to get firmware %s\n", 1090 hif_dev->fw_name); 1091 goto err_fw; 1092 } 1093 1094 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1095 &hif_dev->udev->dev); 1096 if (hif_dev->htc_handle == NULL) 1097 goto err_dev_alloc; 1098 1099 hif_dev->fw_data = fw->data; 1100 hif_dev->fw_size = fw->size; 1101 1102 /* Proceed with initialization */ 1103 1104 ret = ath9k_hif_usb_dev_init(hif_dev); 1105 if (ret) 1106 goto err_dev_init; 1107 1108 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1109 &hif_dev->interface->dev, 1110 hif_dev->usb_device_id->idProduct, 1111 hif_dev->udev->product, 1112 hif_dev->usb_device_id->driver_info); 1113 if (ret) { 1114 ret = -EINVAL; 1115 goto err_htc_hw_init; 1116 } 1117 1118 release_firmware(fw); 1119 hif_dev->flags |= HIF_USB_READY; 1120 complete_all(&hif_dev->fw_done); 1121 1122 return; 1123 1124 err_htc_hw_init: 1125 ath9k_hif_usb_dev_deinit(hif_dev); 1126 err_dev_init: 1127 ath9k_htc_hw_free(hif_dev->htc_handle); 1128 err_dev_alloc: 1129 release_firmware(fw); 1130 err_fw: 1131 ath9k_hif_usb_firmware_fail(hif_dev); 1132 } 1133 1134 /* 1135 * An exact copy of the function from zd1211rw. 1136 */ 1137 static int send_eject_command(struct usb_interface *interface) 1138 { 1139 struct usb_device *udev = interface_to_usbdev(interface); 1140 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1141 struct usb_endpoint_descriptor *endpoint; 1142 unsigned char *cmd; 1143 u8 bulk_out_ep; 1144 int r; 1145 1146 /* Find bulk out endpoint */ 1147 for (r = 1; r >= 0; r--) { 1148 endpoint = &iface_desc->endpoint[r].desc; 1149 if (usb_endpoint_dir_out(endpoint) && 1150 usb_endpoint_xfer_bulk(endpoint)) { 1151 bulk_out_ep = endpoint->bEndpointAddress; 1152 break; 1153 } 1154 } 1155 if (r == -1) { 1156 dev_err(&udev->dev, 1157 "ath9k_htc: Could not find bulk out endpoint\n"); 1158 return -ENODEV; 1159 } 1160 1161 cmd = kzalloc(31, GFP_KERNEL); 1162 if (cmd == NULL) 1163 return -ENODEV; 1164 1165 /* USB bulk command block */ 1166 cmd[0] = 0x55; /* bulk command signature */ 1167 cmd[1] = 0x53; /* bulk command signature */ 1168 cmd[2] = 0x42; /* bulk command signature */ 1169 cmd[3] = 0x43; /* bulk command signature */ 1170 cmd[14] = 6; /* command length */ 1171 1172 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1173 cmd[19] = 0x2; /* eject disc */ 1174 1175 dev_info(&udev->dev, "Ejecting storage device...\n"); 1176 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1177 cmd, 31, NULL, 2000); 1178 kfree(cmd); 1179 if (r) 1180 return r; 1181 1182 /* At this point, the device disconnects and reconnects with the real 1183 * ID numbers. */ 1184 1185 usb_set_intfdata(interface, NULL); 1186 return 0; 1187 } 1188 1189 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1190 const struct usb_device_id *id) 1191 { 1192 struct usb_device *udev = interface_to_usbdev(interface); 1193 struct hif_device_usb *hif_dev; 1194 int ret = 0; 1195 1196 if (id->driver_info == STORAGE_DEVICE) 1197 return send_eject_command(interface); 1198 1199 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1200 if (!hif_dev) { 1201 ret = -ENOMEM; 1202 goto err_alloc; 1203 } 1204 1205 usb_get_dev(udev); 1206 1207 hif_dev->udev = udev; 1208 hif_dev->interface = interface; 1209 hif_dev->usb_device_id = id; 1210 #ifdef CONFIG_PM 1211 udev->reset_resume = 1; 1212 #endif 1213 usb_set_intfdata(interface, hif_dev); 1214 1215 init_completion(&hif_dev->fw_done); 1216 1217 /* Find out which firmware to load */ 1218 1219 if (IS_AR7010_DEVICE(id->driver_info)) 1220 hif_dev->fw_name = FIRMWARE_AR7010_1_1; 1221 else 1222 hif_dev->fw_name = FIRMWARE_AR9271; 1223 1224 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1225 &hif_dev->udev->dev, GFP_KERNEL, 1226 hif_dev, ath9k_hif_usb_firmware_cb); 1227 if (ret) { 1228 dev_err(&hif_dev->udev->dev, 1229 "ath9k_htc: Async request for firmware %s failed\n", 1230 hif_dev->fw_name); 1231 goto err_fw_req; 1232 } 1233 1234 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1235 hif_dev->fw_name); 1236 1237 return 0; 1238 1239 err_fw_req: 1240 usb_set_intfdata(interface, NULL); 1241 kfree(hif_dev); 1242 usb_put_dev(udev); 1243 err_alloc: 1244 return ret; 1245 } 1246 1247 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1248 { 1249 u32 reboot_cmd = 0xffffffff; 1250 void *buf; 1251 int ret; 1252 1253 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1254 if (!buf) 1255 return; 1256 1257 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1258 buf, 4, NULL, HZ); 1259 if (ret) 1260 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1261 1262 kfree(buf); 1263 } 1264 1265 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1266 { 1267 struct usb_device *udev = interface_to_usbdev(interface); 1268 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1269 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1270 1271 if (!hif_dev) 1272 return; 1273 1274 wait_for_completion(&hif_dev->fw_done); 1275 1276 if (hif_dev->flags & HIF_USB_READY) { 1277 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1278 ath9k_htc_hw_free(hif_dev->htc_handle); 1279 ath9k_hif_usb_dev_deinit(hif_dev); 1280 } 1281 1282 usb_set_intfdata(interface, NULL); 1283 1284 /* If firmware was loaded we should drop it 1285 * go back to first stage bootloader. */ 1286 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1287 ath9k_hif_usb_reboot(udev); 1288 1289 kfree(hif_dev); 1290 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1291 usb_put_dev(udev); 1292 } 1293 1294 #ifdef CONFIG_PM 1295 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1296 pm_message_t message) 1297 { 1298 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1299 1300 /* 1301 * The device has to be set to FULLSLEEP mode in case no 1302 * interface is up. 1303 */ 1304 if (!(hif_dev->flags & HIF_USB_START)) 1305 ath9k_htc_suspend(hif_dev->htc_handle); 1306 1307 wait_for_completion(&hif_dev->fw_done); 1308 1309 if (hif_dev->flags & HIF_USB_READY) 1310 ath9k_hif_usb_dealloc_urbs(hif_dev); 1311 1312 return 0; 1313 } 1314 1315 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1316 { 1317 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1318 struct htc_target *htc_handle = hif_dev->htc_handle; 1319 int ret; 1320 const struct firmware *fw; 1321 1322 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1323 if (ret) 1324 return ret; 1325 1326 if (hif_dev->flags & HIF_USB_READY) { 1327 /* request cached firmware during suspend/resume cycle */ 1328 ret = request_firmware(&fw, hif_dev->fw_name, 1329 &hif_dev->udev->dev); 1330 if (ret) 1331 goto fail_resume; 1332 1333 hif_dev->fw_data = fw->data; 1334 hif_dev->fw_size = fw->size; 1335 ret = ath9k_hif_usb_download_fw(hif_dev); 1336 release_firmware(fw); 1337 if (ret) 1338 goto fail_resume; 1339 } else { 1340 ath9k_hif_usb_dealloc_urbs(hif_dev); 1341 return -EIO; 1342 } 1343 1344 mdelay(100); 1345 1346 ret = ath9k_htc_resume(htc_handle); 1347 1348 if (ret) 1349 goto fail_resume; 1350 1351 return 0; 1352 1353 fail_resume: 1354 ath9k_hif_usb_dealloc_urbs(hif_dev); 1355 1356 return ret; 1357 } 1358 #endif 1359 1360 static struct usb_driver ath9k_hif_usb_driver = { 1361 .name = KBUILD_MODNAME, 1362 .probe = ath9k_hif_usb_probe, 1363 .disconnect = ath9k_hif_usb_disconnect, 1364 #ifdef CONFIG_PM 1365 .suspend = ath9k_hif_usb_suspend, 1366 .resume = ath9k_hif_usb_resume, 1367 .reset_resume = ath9k_hif_usb_resume, 1368 #endif 1369 .id_table = ath9k_hif_usb_ids, 1370 .soft_unbind = 1, 1371 .disable_hub_initiated_lpm = 1, 1372 }; 1373 1374 int ath9k_hif_usb_init(void) 1375 { 1376 return usb_register(&ath9k_hif_usb_driver); 1377 } 1378 1379 void ath9k_hif_usb_exit(void) 1380 { 1381 usb_deregister(&ath9k_hif_usb_driver); 1382 } 1383