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 MODULE_FIRMWARE(HTC_7010_MODULE_FW); 21 MODULE_FIRMWARE(HTC_9271_MODULE_FW); 22 23 static const struct usb_device_id ath9k_hif_usb_ids[] = { 24 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */ 25 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */ 26 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */ 27 { USB_DEVICE(0x07b8, 0x9271) }, /* Altai WA1011N-GU */ 28 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */ 29 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */ 30 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */ 31 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */ 32 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */ 33 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */ 34 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */ 35 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */ 36 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */ 37 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */ 38 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */ 39 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */ 40 { USB_DEVICE(0x0471, 0x209e) }, /* Philips (or NXP) PTA01 */ 41 { USB_DEVICE(0x1eda, 0x2315) }, /* AirTies */ 42 43 { USB_DEVICE(0x0cf3, 0x7015), 44 .driver_info = AR9287_USB }, /* Atheros */ 45 { USB_DEVICE(0x1668, 0x1200), 46 .driver_info = AR9287_USB }, /* Verizon */ 47 48 { USB_DEVICE(0x0cf3, 0x7010), 49 .driver_info = AR9280_USB }, /* Atheros */ 50 { USB_DEVICE(0x0846, 0x9018), 51 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */ 52 { USB_DEVICE(0x083A, 0xA704), 53 .driver_info = AR9280_USB }, /* SMC Networks */ 54 { USB_DEVICE(0x0411, 0x017f), 55 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */ 56 { USB_DEVICE(0x0411, 0x0197), 57 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */ 58 { USB_DEVICE(0x04da, 0x3904), 59 .driver_info = AR9280_USB }, 60 { USB_DEVICE(0x0930, 0x0a08), 61 .driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */ 62 63 { USB_DEVICE(0x0cf3, 0x20ff), 64 .driver_info = STORAGE_DEVICE }, 65 66 { }, 67 }; 68 69 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); 70 71 static int __hif_usb_tx(struct hif_device_usb *hif_dev); 72 73 static void hif_usb_regout_cb(struct urb *urb) 74 { 75 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 76 77 switch (urb->status) { 78 case 0: 79 break; 80 case -ENOENT: 81 case -ECONNRESET: 82 case -ENODEV: 83 case -ESHUTDOWN: 84 goto free; 85 default: 86 break; 87 } 88 89 if (cmd) { 90 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 91 cmd->skb, true); 92 kfree(cmd); 93 } 94 95 return; 96 free: 97 kfree_skb(cmd->skb); 98 kfree(cmd); 99 } 100 101 static int hif_usb_send_regout(struct hif_device_usb *hif_dev, 102 struct sk_buff *skb) 103 { 104 struct urb *urb; 105 struct cmd_buf *cmd; 106 int ret = 0; 107 108 urb = usb_alloc_urb(0, GFP_KERNEL); 109 if (urb == NULL) 110 return -ENOMEM; 111 112 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 113 if (cmd == NULL) { 114 usb_free_urb(urb); 115 return -ENOMEM; 116 } 117 118 cmd->skb = skb; 119 cmd->hif_dev = hif_dev; 120 121 usb_fill_int_urb(urb, hif_dev->udev, 122 usb_sndintpipe(hif_dev->udev, USB_REG_OUT_PIPE), 123 skb->data, skb->len, 124 hif_usb_regout_cb, cmd, 1); 125 126 usb_anchor_urb(urb, &hif_dev->regout_submitted); 127 ret = usb_submit_urb(urb, GFP_KERNEL); 128 if (ret) { 129 usb_unanchor_urb(urb); 130 kfree(cmd); 131 } 132 usb_free_urb(urb); 133 134 return ret; 135 } 136 137 static void hif_usb_mgmt_cb(struct urb *urb) 138 { 139 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 140 struct hif_device_usb *hif_dev; 141 bool txok = true; 142 143 if (!cmd || !cmd->skb || !cmd->hif_dev) 144 return; 145 146 hif_dev = cmd->hif_dev; 147 148 switch (urb->status) { 149 case 0: 150 break; 151 case -ENOENT: 152 case -ECONNRESET: 153 case -ENODEV: 154 case -ESHUTDOWN: 155 txok = false; 156 157 /* 158 * If the URBs are being flushed, no need to complete 159 * this packet. 160 */ 161 spin_lock(&hif_dev->tx.tx_lock); 162 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 163 spin_unlock(&hif_dev->tx.tx_lock); 164 dev_kfree_skb_any(cmd->skb); 165 kfree(cmd); 166 return; 167 } 168 spin_unlock(&hif_dev->tx.tx_lock); 169 170 break; 171 default: 172 txok = false; 173 break; 174 } 175 176 skb_pull(cmd->skb, 4); 177 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 178 cmd->skb, txok); 179 kfree(cmd); 180 } 181 182 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 183 struct sk_buff *skb) 184 { 185 struct urb *urb; 186 struct cmd_buf *cmd; 187 int ret = 0; 188 __le16 *hdr; 189 190 urb = usb_alloc_urb(0, GFP_ATOMIC); 191 if (urb == NULL) 192 return -ENOMEM; 193 194 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 195 if (cmd == NULL) { 196 usb_free_urb(urb); 197 return -ENOMEM; 198 } 199 200 cmd->skb = skb; 201 cmd->hif_dev = hif_dev; 202 203 hdr = skb_push(skb, 4); 204 *hdr++ = cpu_to_le16(skb->len - 4); 205 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 206 207 usb_fill_bulk_urb(urb, hif_dev->udev, 208 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 209 skb->data, skb->len, 210 hif_usb_mgmt_cb, cmd); 211 212 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 213 ret = usb_submit_urb(urb, GFP_ATOMIC); 214 if (ret) { 215 usb_unanchor_urb(urb); 216 kfree(cmd); 217 } 218 usb_free_urb(urb); 219 220 return ret; 221 } 222 223 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 224 struct sk_buff_head *list) 225 { 226 struct sk_buff *skb; 227 228 while ((skb = __skb_dequeue(list)) != NULL) { 229 dev_kfree_skb_any(skb); 230 } 231 } 232 233 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 234 struct sk_buff_head *queue, 235 bool txok) 236 { 237 struct sk_buff *skb; 238 239 while ((skb = __skb_dequeue(queue)) != NULL) { 240 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 241 int ln = skb->len; 242 #endif 243 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 244 skb, txok); 245 if (txok) { 246 TX_STAT_INC(skb_success); 247 TX_STAT_ADD(skb_success_bytes, ln); 248 } 249 else 250 TX_STAT_INC(skb_failed); 251 } 252 } 253 254 static void hif_usb_tx_cb(struct urb *urb) 255 { 256 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 257 struct hif_device_usb *hif_dev; 258 bool txok = true; 259 260 if (!tx_buf || !tx_buf->hif_dev) 261 return; 262 263 hif_dev = tx_buf->hif_dev; 264 265 switch (urb->status) { 266 case 0: 267 break; 268 case -ENOENT: 269 case -ECONNRESET: 270 case -ENODEV: 271 case -ESHUTDOWN: 272 txok = false; 273 274 /* 275 * If the URBs are being flushed, no need to add this 276 * URB to the free list. 277 */ 278 spin_lock(&hif_dev->tx.tx_lock); 279 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 280 spin_unlock(&hif_dev->tx.tx_lock); 281 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 282 return; 283 } 284 spin_unlock(&hif_dev->tx.tx_lock); 285 286 break; 287 default: 288 txok = false; 289 break; 290 } 291 292 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 293 294 /* Re-initialize the SKB queue */ 295 tx_buf->len = tx_buf->offset = 0; 296 __skb_queue_head_init(&tx_buf->skb_queue); 297 298 /* Add this TX buffer to the free list */ 299 spin_lock(&hif_dev->tx.tx_lock); 300 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 301 hif_dev->tx.tx_buf_cnt++; 302 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 303 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 304 TX_STAT_INC(buf_completed); 305 spin_unlock(&hif_dev->tx.tx_lock); 306 } 307 308 /* TX lock has to be taken */ 309 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 310 { 311 struct tx_buf *tx_buf = NULL; 312 struct sk_buff *nskb = NULL; 313 int ret = 0, i; 314 u16 tx_skb_cnt = 0; 315 u8 *buf; 316 __le16 *hdr; 317 318 if (hif_dev->tx.tx_skb_cnt == 0) 319 return 0; 320 321 /* Check if a free TX buffer is available */ 322 if (list_empty(&hif_dev->tx.tx_buf)) 323 return 0; 324 325 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 326 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 327 hif_dev->tx.tx_buf_cnt--; 328 329 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 330 331 for (i = 0; i < tx_skb_cnt; i++) { 332 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 333 334 /* Should never be NULL */ 335 BUG_ON(!nskb); 336 337 hif_dev->tx.tx_skb_cnt--; 338 339 buf = tx_buf->buf; 340 buf += tx_buf->offset; 341 hdr = (__le16 *)buf; 342 *hdr++ = cpu_to_le16(nskb->len); 343 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 344 buf += 4; 345 memcpy(buf, nskb->data, nskb->len); 346 tx_buf->len = nskb->len + 4; 347 348 if (i < (tx_skb_cnt - 1)) 349 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 350 351 if (i == (tx_skb_cnt - 1)) 352 tx_buf->len += tx_buf->offset; 353 354 __skb_queue_tail(&tx_buf->skb_queue, nskb); 355 TX_STAT_INC(skb_queued); 356 } 357 358 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 359 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 360 tx_buf->buf, tx_buf->len, 361 hif_usb_tx_cb, tx_buf); 362 363 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 364 if (ret) { 365 tx_buf->len = tx_buf->offset = 0; 366 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 367 __skb_queue_head_init(&tx_buf->skb_queue); 368 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 369 hif_dev->tx.tx_buf_cnt++; 370 } 371 372 if (!ret) 373 TX_STAT_INC(buf_queued); 374 375 return ret; 376 } 377 378 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 379 { 380 struct ath9k_htc_tx_ctl *tx_ctl; 381 unsigned long flags; 382 int ret = 0; 383 384 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 385 386 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 387 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 388 return -ENODEV; 389 } 390 391 /* Check if the max queue count has been reached */ 392 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 393 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 394 return -ENOMEM; 395 } 396 397 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 398 399 tx_ctl = HTC_SKB_CB(skb); 400 401 /* Mgmt/Beacon frames don't use the TX buffer pool */ 402 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 403 (tx_ctl->type == ATH9K_HTC_BEACON)) { 404 ret = hif_usb_send_mgmt(hif_dev, skb); 405 } 406 407 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 408 409 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 410 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 411 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 412 hif_dev->tx.tx_skb_cnt++; 413 } 414 415 /* Check if AMPDUs have to be sent immediately */ 416 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 417 (hif_dev->tx.tx_skb_cnt < 2)) { 418 __hif_usb_tx(hif_dev); 419 } 420 421 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 422 423 return ret; 424 } 425 426 static void hif_usb_start(void *hif_handle) 427 { 428 struct hif_device_usb *hif_dev = hif_handle; 429 unsigned long flags; 430 431 hif_dev->flags |= HIF_USB_START; 432 433 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 434 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 435 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 436 } 437 438 static void hif_usb_stop(void *hif_handle) 439 { 440 struct hif_device_usb *hif_dev = hif_handle; 441 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 442 unsigned long flags; 443 444 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 445 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 446 hif_dev->tx.tx_skb_cnt = 0; 447 hif_dev->tx.flags |= HIF_USB_TX_STOP; 448 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 449 450 /* The pending URBs have to be canceled. */ 451 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 452 &hif_dev->tx.tx_pending, list) { 453 usb_kill_urb(tx_buf->urb); 454 } 455 456 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 457 } 458 459 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 460 { 461 struct hif_device_usb *hif_dev = hif_handle; 462 int ret = 0; 463 464 switch (pipe_id) { 465 case USB_WLAN_TX_PIPE: 466 ret = hif_usb_send_tx(hif_dev, skb); 467 break; 468 case USB_REG_OUT_PIPE: 469 ret = hif_usb_send_regout(hif_dev, skb); 470 break; 471 default: 472 dev_err(&hif_dev->udev->dev, 473 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 474 ret = -EINVAL; 475 break; 476 } 477 478 return ret; 479 } 480 481 static inline bool check_index(struct sk_buff *skb, u8 idx) 482 { 483 struct ath9k_htc_tx_ctl *tx_ctl; 484 485 tx_ctl = HTC_SKB_CB(skb); 486 487 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 488 (tx_ctl->sta_idx == idx)) 489 return true; 490 491 return false; 492 } 493 494 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 495 { 496 struct hif_device_usb *hif_dev = hif_handle; 497 struct sk_buff *skb, *tmp; 498 unsigned long flags; 499 500 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 501 502 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 503 if (check_index(skb, idx)) { 504 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 505 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 506 skb, false); 507 hif_dev->tx.tx_skb_cnt--; 508 TX_STAT_INC(skb_failed); 509 } 510 } 511 512 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 513 } 514 515 static struct ath9k_htc_hif hif_usb = { 516 .transport = ATH9K_HIF_USB, 517 .name = "ath9k_hif_usb", 518 519 .control_ul_pipe = USB_REG_OUT_PIPE, 520 .control_dl_pipe = USB_REG_IN_PIPE, 521 522 .start = hif_usb_start, 523 .stop = hif_usb_stop, 524 .sta_drain = hif_usb_sta_drain, 525 .send = hif_usb_send, 526 }; 527 528 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 529 struct sk_buff *skb) 530 { 531 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 532 int index = 0, i, len = skb->len; 533 int rx_remain_len, rx_pkt_len; 534 u16 pool_index = 0; 535 u8 *ptr; 536 537 spin_lock(&hif_dev->rx_lock); 538 539 rx_remain_len = hif_dev->rx_remain_len; 540 rx_pkt_len = hif_dev->rx_transfer_len; 541 542 if (rx_remain_len != 0) { 543 struct sk_buff *remain_skb = hif_dev->remain_skb; 544 545 if (remain_skb) { 546 ptr = (u8 *) remain_skb->data; 547 548 index = rx_remain_len; 549 rx_remain_len -= hif_dev->rx_pad_len; 550 ptr += rx_pkt_len; 551 552 memcpy(ptr, skb->data, rx_remain_len); 553 554 rx_pkt_len += rx_remain_len; 555 hif_dev->rx_remain_len = 0; 556 skb_put(remain_skb, rx_pkt_len); 557 558 skb_pool[pool_index++] = remain_skb; 559 560 } else { 561 index = rx_remain_len; 562 } 563 } 564 565 spin_unlock(&hif_dev->rx_lock); 566 567 while (index < len) { 568 u16 pkt_len; 569 u16 pkt_tag; 570 u16 pad_len; 571 int chk_idx; 572 573 ptr = (u8 *) skb->data; 574 575 pkt_len = get_unaligned_le16(ptr + index); 576 pkt_tag = get_unaligned_le16(ptr + index + 2); 577 578 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 579 RX_STAT_INC(skb_dropped); 580 return; 581 } 582 583 pad_len = 4 - (pkt_len & 0x3); 584 if (pad_len == 4) 585 pad_len = 0; 586 587 chk_idx = index; 588 index = index + 4 + pkt_len + pad_len; 589 590 if (index > MAX_RX_BUF_SIZE) { 591 spin_lock(&hif_dev->rx_lock); 592 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 593 hif_dev->rx_transfer_len = 594 MAX_RX_BUF_SIZE - chk_idx - 4; 595 hif_dev->rx_pad_len = pad_len; 596 597 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 598 if (!nskb) { 599 dev_err(&hif_dev->udev->dev, 600 "ath9k_htc: RX memory allocation error\n"); 601 spin_unlock(&hif_dev->rx_lock); 602 goto err; 603 } 604 skb_reserve(nskb, 32); 605 RX_STAT_INC(skb_allocated); 606 607 memcpy(nskb->data, &(skb->data[chk_idx+4]), 608 hif_dev->rx_transfer_len); 609 610 /* Record the buffer pointer */ 611 hif_dev->remain_skb = nskb; 612 spin_unlock(&hif_dev->rx_lock); 613 } else { 614 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 615 if (!nskb) { 616 dev_err(&hif_dev->udev->dev, 617 "ath9k_htc: RX memory allocation error\n"); 618 goto err; 619 } 620 skb_reserve(nskb, 32); 621 RX_STAT_INC(skb_allocated); 622 623 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 624 skb_put(nskb, pkt_len); 625 skb_pool[pool_index++] = nskb; 626 } 627 } 628 629 err: 630 for (i = 0; i < pool_index; i++) { 631 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 632 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 633 skb_pool[i]->len, USB_WLAN_RX_PIPE); 634 RX_STAT_INC(skb_completed); 635 } 636 } 637 638 static void ath9k_hif_usb_rx_cb(struct urb *urb) 639 { 640 struct sk_buff *skb = (struct sk_buff *) urb->context; 641 struct hif_device_usb *hif_dev = 642 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 643 int ret; 644 645 if (!skb) 646 return; 647 648 if (!hif_dev) 649 goto free; 650 651 switch (urb->status) { 652 case 0: 653 break; 654 case -ENOENT: 655 case -ECONNRESET: 656 case -ENODEV: 657 case -ESHUTDOWN: 658 goto free; 659 default: 660 goto resubmit; 661 } 662 663 if (likely(urb->actual_length != 0)) { 664 skb_put(skb, urb->actual_length); 665 ath9k_hif_usb_rx_stream(hif_dev, skb); 666 } 667 668 resubmit: 669 skb_reset_tail_pointer(skb); 670 skb_trim(skb, 0); 671 672 usb_anchor_urb(urb, &hif_dev->rx_submitted); 673 ret = usb_submit_urb(urb, GFP_ATOMIC); 674 if (ret) { 675 usb_unanchor_urb(urb); 676 goto free; 677 } 678 679 return; 680 free: 681 kfree_skb(skb); 682 } 683 684 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 685 { 686 struct sk_buff *skb = (struct sk_buff *) urb->context; 687 struct sk_buff *nskb; 688 struct hif_device_usb *hif_dev = 689 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 690 int ret; 691 692 if (!skb) 693 return; 694 695 if (!hif_dev) 696 goto free; 697 698 switch (urb->status) { 699 case 0: 700 break; 701 case -ENOENT: 702 case -ECONNRESET: 703 case -ENODEV: 704 case -ESHUTDOWN: 705 goto free; 706 default: 707 skb_reset_tail_pointer(skb); 708 skb_trim(skb, 0); 709 710 goto resubmit; 711 } 712 713 if (likely(urb->actual_length != 0)) { 714 skb_put(skb, urb->actual_length); 715 716 /* Process the command first */ 717 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 718 skb->len, USB_REG_IN_PIPE); 719 720 721 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 722 if (!nskb) { 723 dev_err(&hif_dev->udev->dev, 724 "ath9k_htc: REG_IN memory allocation failure\n"); 725 urb->context = NULL; 726 return; 727 } 728 729 usb_fill_int_urb(urb, hif_dev->udev, 730 usb_rcvintpipe(hif_dev->udev, 731 USB_REG_IN_PIPE), 732 nskb->data, MAX_REG_IN_BUF_SIZE, 733 ath9k_hif_usb_reg_in_cb, nskb, 1); 734 } 735 736 resubmit: 737 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 738 ret = usb_submit_urb(urb, GFP_ATOMIC); 739 if (ret) { 740 usb_unanchor_urb(urb); 741 goto free; 742 } 743 744 return; 745 free: 746 kfree_skb(skb); 747 urb->context = NULL; 748 } 749 750 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 751 { 752 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 753 unsigned long flags; 754 755 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 756 &hif_dev->tx.tx_buf, list) { 757 usb_kill_urb(tx_buf->urb); 758 list_del(&tx_buf->list); 759 usb_free_urb(tx_buf->urb); 760 kfree(tx_buf->buf); 761 kfree(tx_buf); 762 } 763 764 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 765 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 766 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 767 768 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 769 &hif_dev->tx.tx_pending, list) { 770 usb_kill_urb(tx_buf->urb); 771 list_del(&tx_buf->list); 772 usb_free_urb(tx_buf->urb); 773 kfree(tx_buf->buf); 774 kfree(tx_buf); 775 } 776 777 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 778 } 779 780 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 781 { 782 struct tx_buf *tx_buf; 783 int i; 784 785 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 786 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 787 spin_lock_init(&hif_dev->tx.tx_lock); 788 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 789 init_usb_anchor(&hif_dev->mgmt_submitted); 790 791 for (i = 0; i < MAX_TX_URB_NUM; i++) { 792 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 793 if (!tx_buf) 794 goto err; 795 796 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 797 if (!tx_buf->buf) 798 goto err; 799 800 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 801 if (!tx_buf->urb) 802 goto err; 803 804 tx_buf->hif_dev = hif_dev; 805 __skb_queue_head_init(&tx_buf->skb_queue); 806 807 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 808 } 809 810 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 811 812 return 0; 813 err: 814 if (tx_buf) { 815 kfree(tx_buf->buf); 816 kfree(tx_buf); 817 } 818 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 819 return -ENOMEM; 820 } 821 822 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 823 { 824 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 825 } 826 827 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 828 { 829 struct urb *urb = NULL; 830 struct sk_buff *skb = NULL; 831 int i, ret; 832 833 init_usb_anchor(&hif_dev->rx_submitted); 834 spin_lock_init(&hif_dev->rx_lock); 835 836 for (i = 0; i < MAX_RX_URB_NUM; i++) { 837 838 /* Allocate URB */ 839 urb = usb_alloc_urb(0, GFP_KERNEL); 840 if (urb == NULL) { 841 ret = -ENOMEM; 842 goto err_urb; 843 } 844 845 /* Allocate buffer */ 846 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 847 if (!skb) { 848 ret = -ENOMEM; 849 goto err_skb; 850 } 851 852 usb_fill_bulk_urb(urb, hif_dev->udev, 853 usb_rcvbulkpipe(hif_dev->udev, 854 USB_WLAN_RX_PIPE), 855 skb->data, MAX_RX_BUF_SIZE, 856 ath9k_hif_usb_rx_cb, skb); 857 858 /* Anchor URB */ 859 usb_anchor_urb(urb, &hif_dev->rx_submitted); 860 861 /* Submit URB */ 862 ret = usb_submit_urb(urb, GFP_KERNEL); 863 if (ret) { 864 usb_unanchor_urb(urb); 865 goto err_submit; 866 } 867 868 /* 869 * Drop reference count. 870 * This ensures that the URB is freed when killing them. 871 */ 872 usb_free_urb(urb); 873 } 874 875 return 0; 876 877 err_submit: 878 kfree_skb(skb); 879 err_skb: 880 usb_free_urb(urb); 881 err_urb: 882 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 883 return ret; 884 } 885 886 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 887 { 888 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 889 } 890 891 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 892 { 893 struct urb *urb = NULL; 894 struct sk_buff *skb = NULL; 895 int i, ret; 896 897 init_usb_anchor(&hif_dev->reg_in_submitted); 898 899 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 900 901 /* Allocate URB */ 902 urb = usb_alloc_urb(0, GFP_KERNEL); 903 if (urb == NULL) { 904 ret = -ENOMEM; 905 goto err_urb; 906 } 907 908 /* Allocate buffer */ 909 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 910 if (!skb) { 911 ret = -ENOMEM; 912 goto err_skb; 913 } 914 915 usb_fill_int_urb(urb, hif_dev->udev, 916 usb_rcvintpipe(hif_dev->udev, 917 USB_REG_IN_PIPE), 918 skb->data, MAX_REG_IN_BUF_SIZE, 919 ath9k_hif_usb_reg_in_cb, skb, 1); 920 921 /* Anchor URB */ 922 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 923 924 /* Submit URB */ 925 ret = usb_submit_urb(urb, GFP_KERNEL); 926 if (ret) { 927 usb_unanchor_urb(urb); 928 goto err_submit; 929 } 930 931 /* 932 * Drop reference count. 933 * This ensures that the URB is freed when killing them. 934 */ 935 usb_free_urb(urb); 936 } 937 938 return 0; 939 940 err_submit: 941 kfree_skb(skb); 942 err_skb: 943 usb_free_urb(urb); 944 err_urb: 945 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 946 return ret; 947 } 948 949 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 950 { 951 /* Register Write */ 952 init_usb_anchor(&hif_dev->regout_submitted); 953 954 /* TX */ 955 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 956 goto err; 957 958 /* RX */ 959 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 960 goto err_rx; 961 962 /* Register Read */ 963 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 964 goto err_reg; 965 966 return 0; 967 err_reg: 968 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 969 err_rx: 970 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 971 err: 972 return -ENOMEM; 973 } 974 975 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 976 { 977 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 978 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 979 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 980 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 981 } 982 983 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 984 { 985 int transfer, err; 986 const void *data = hif_dev->fw_data; 987 size_t len = hif_dev->fw_size; 988 u32 addr = AR9271_FIRMWARE; 989 u8 *buf = kzalloc(4096, GFP_KERNEL); 990 u32 firm_offset; 991 992 if (!buf) 993 return -ENOMEM; 994 995 while (len) { 996 transfer = min_t(size_t, len, 4096); 997 memcpy(buf, data, transfer); 998 999 err = usb_control_msg(hif_dev->udev, 1000 usb_sndctrlpipe(hif_dev->udev, 0), 1001 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1002 addr >> 8, 0, buf, transfer, 1003 USB_MSG_TIMEOUT); 1004 if (err < 0) { 1005 kfree(buf); 1006 return err; 1007 } 1008 1009 len -= transfer; 1010 data += transfer; 1011 addr += transfer; 1012 } 1013 kfree(buf); 1014 1015 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1016 firm_offset = AR7010_FIRMWARE_TEXT; 1017 else 1018 firm_offset = AR9271_FIRMWARE_TEXT; 1019 1020 /* 1021 * Issue FW download complete command to firmware. 1022 */ 1023 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1024 FIRMWARE_DOWNLOAD_COMP, 1025 0x40 | USB_DIR_OUT, 1026 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1027 if (err) 1028 return -EIO; 1029 1030 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1031 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1032 1033 return 0; 1034 } 1035 1036 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1037 { 1038 int ret; 1039 1040 ret = ath9k_hif_usb_download_fw(hif_dev); 1041 if (ret) { 1042 dev_err(&hif_dev->udev->dev, 1043 "ath9k_htc: Firmware - %s download failed\n", 1044 hif_dev->fw_name); 1045 return ret; 1046 } 1047 1048 /* Alloc URBs */ 1049 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1050 if (ret) { 1051 dev_err(&hif_dev->udev->dev, 1052 "ath9k_htc: Unable to allocate URBs\n"); 1053 return ret; 1054 } 1055 1056 return 0; 1057 } 1058 1059 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1060 { 1061 ath9k_hif_usb_dealloc_urbs(hif_dev); 1062 } 1063 1064 /* 1065 * If initialization fails or the FW cannot be retrieved, 1066 * detach the device. 1067 */ 1068 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1069 { 1070 struct device *dev = &hif_dev->udev->dev; 1071 struct device *parent = dev->parent; 1072 1073 complete_all(&hif_dev->fw_done); 1074 1075 if (parent) 1076 device_lock(parent); 1077 1078 device_release_driver(dev); 1079 1080 if (parent) 1081 device_unlock(parent); 1082 } 1083 1084 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1085 1086 /* taken from iwlwifi */ 1087 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1088 bool first) 1089 { 1090 char index[8], *chip; 1091 int ret; 1092 1093 if (first) { 1094 if (htc_use_dev_fw) { 1095 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1096 sprintf(index, "%s", "dev"); 1097 } else { 1098 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1099 sprintf(index, "%d", hif_dev->fw_minor_index); 1100 } 1101 } else { 1102 hif_dev->fw_minor_index--; 1103 sprintf(index, "%d", hif_dev->fw_minor_index); 1104 } 1105 1106 /* test for FW 1.3 */ 1107 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1108 const char *filename; 1109 1110 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1111 filename = FIRMWARE_AR7010_1_1; 1112 else 1113 filename = FIRMWARE_AR9271; 1114 1115 /* expected fw locations: 1116 * - htc_9271.fw (stable version 1.3, depricated) 1117 */ 1118 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1119 "%s", filename); 1120 1121 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1122 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1123 1124 return -ENOENT; 1125 } else { 1126 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1127 chip = "7010"; 1128 else 1129 chip = "9271"; 1130 1131 /* expected fw locations: 1132 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1133 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1134 */ 1135 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1136 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1137 chip, MAJOR_VERSION_REQ, index); 1138 } 1139 1140 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1141 &hif_dev->udev->dev, GFP_KERNEL, 1142 hif_dev, ath9k_hif_usb_firmware_cb); 1143 if (ret) { 1144 dev_err(&hif_dev->udev->dev, 1145 "ath9k_htc: Async request for firmware %s failed\n", 1146 hif_dev->fw_name); 1147 return ret; 1148 } 1149 1150 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1151 hif_dev->fw_name); 1152 1153 return ret; 1154 } 1155 1156 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1157 { 1158 struct hif_device_usb *hif_dev = context; 1159 int ret; 1160 1161 if (!fw) { 1162 ret = ath9k_hif_request_firmware(hif_dev, false); 1163 if (!ret) 1164 return; 1165 1166 dev_err(&hif_dev->udev->dev, 1167 "ath9k_htc: Failed to get firmware %s\n", 1168 hif_dev->fw_name); 1169 goto err_fw; 1170 } 1171 1172 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1173 &hif_dev->udev->dev); 1174 if (hif_dev->htc_handle == NULL) 1175 goto err_dev_alloc; 1176 1177 hif_dev->fw_data = fw->data; 1178 hif_dev->fw_size = fw->size; 1179 1180 /* Proceed with initialization */ 1181 1182 ret = ath9k_hif_usb_dev_init(hif_dev); 1183 if (ret) 1184 goto err_dev_init; 1185 1186 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1187 &hif_dev->interface->dev, 1188 hif_dev->usb_device_id->idProduct, 1189 hif_dev->udev->product, 1190 hif_dev->usb_device_id->driver_info); 1191 if (ret) { 1192 ret = -EINVAL; 1193 goto err_htc_hw_init; 1194 } 1195 1196 release_firmware(fw); 1197 hif_dev->flags |= HIF_USB_READY; 1198 complete_all(&hif_dev->fw_done); 1199 1200 return; 1201 1202 err_htc_hw_init: 1203 ath9k_hif_usb_dev_deinit(hif_dev); 1204 err_dev_init: 1205 ath9k_htc_hw_free(hif_dev->htc_handle); 1206 err_dev_alloc: 1207 release_firmware(fw); 1208 err_fw: 1209 ath9k_hif_usb_firmware_fail(hif_dev); 1210 } 1211 1212 /* 1213 * An exact copy of the function from zd1211rw. 1214 */ 1215 static int send_eject_command(struct usb_interface *interface) 1216 { 1217 struct usb_device *udev = interface_to_usbdev(interface); 1218 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1219 struct usb_endpoint_descriptor *endpoint; 1220 unsigned char *cmd; 1221 u8 bulk_out_ep; 1222 int r; 1223 1224 if (iface_desc->desc.bNumEndpoints < 2) 1225 return -ENODEV; 1226 1227 /* Find bulk out endpoint */ 1228 for (r = 1; r >= 0; r--) { 1229 endpoint = &iface_desc->endpoint[r].desc; 1230 if (usb_endpoint_dir_out(endpoint) && 1231 usb_endpoint_xfer_bulk(endpoint)) { 1232 bulk_out_ep = endpoint->bEndpointAddress; 1233 break; 1234 } 1235 } 1236 if (r == -1) { 1237 dev_err(&udev->dev, 1238 "ath9k_htc: Could not find bulk out endpoint\n"); 1239 return -ENODEV; 1240 } 1241 1242 cmd = kzalloc(31, GFP_KERNEL); 1243 if (cmd == NULL) 1244 return -ENODEV; 1245 1246 /* USB bulk command block */ 1247 cmd[0] = 0x55; /* bulk command signature */ 1248 cmd[1] = 0x53; /* bulk command signature */ 1249 cmd[2] = 0x42; /* bulk command signature */ 1250 cmd[3] = 0x43; /* bulk command signature */ 1251 cmd[14] = 6; /* command length */ 1252 1253 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1254 cmd[19] = 0x2; /* eject disc */ 1255 1256 dev_info(&udev->dev, "Ejecting storage device...\n"); 1257 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1258 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1259 kfree(cmd); 1260 if (r) 1261 return r; 1262 1263 /* At this point, the device disconnects and reconnects with the real 1264 * ID numbers. */ 1265 1266 usb_set_intfdata(interface, NULL); 1267 return 0; 1268 } 1269 1270 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1271 const struct usb_device_id *id) 1272 { 1273 struct usb_device *udev = interface_to_usbdev(interface); 1274 struct hif_device_usb *hif_dev; 1275 int ret = 0; 1276 1277 if (id->driver_info == STORAGE_DEVICE) 1278 return send_eject_command(interface); 1279 1280 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1281 if (!hif_dev) { 1282 ret = -ENOMEM; 1283 goto err_alloc; 1284 } 1285 1286 usb_get_dev(udev); 1287 1288 hif_dev->udev = udev; 1289 hif_dev->interface = interface; 1290 hif_dev->usb_device_id = id; 1291 #ifdef CONFIG_PM 1292 udev->reset_resume = 1; 1293 #endif 1294 usb_set_intfdata(interface, hif_dev); 1295 1296 init_completion(&hif_dev->fw_done); 1297 1298 ret = ath9k_hif_request_firmware(hif_dev, true); 1299 if (ret) 1300 goto err_fw_req; 1301 1302 return ret; 1303 1304 err_fw_req: 1305 usb_set_intfdata(interface, NULL); 1306 kfree(hif_dev); 1307 usb_put_dev(udev); 1308 err_alloc: 1309 return ret; 1310 } 1311 1312 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1313 { 1314 u32 reboot_cmd = 0xffffffff; 1315 void *buf; 1316 int ret; 1317 1318 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1319 if (!buf) 1320 return; 1321 1322 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1323 buf, 4, NULL, USB_MSG_TIMEOUT); 1324 if (ret) 1325 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1326 1327 kfree(buf); 1328 } 1329 1330 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1331 { 1332 struct usb_device *udev = interface_to_usbdev(interface); 1333 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1334 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1335 1336 if (!hif_dev) 1337 return; 1338 1339 wait_for_completion(&hif_dev->fw_done); 1340 1341 if (hif_dev->flags & HIF_USB_READY) { 1342 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1343 ath9k_htc_hw_free(hif_dev->htc_handle); 1344 ath9k_hif_usb_dev_deinit(hif_dev); 1345 } 1346 1347 usb_set_intfdata(interface, NULL); 1348 1349 /* If firmware was loaded we should drop it 1350 * go back to first stage bootloader. */ 1351 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1352 ath9k_hif_usb_reboot(udev); 1353 1354 kfree(hif_dev); 1355 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1356 usb_put_dev(udev); 1357 } 1358 1359 #ifdef CONFIG_PM 1360 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1361 pm_message_t message) 1362 { 1363 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1364 1365 /* 1366 * The device has to be set to FULLSLEEP mode in case no 1367 * interface is up. 1368 */ 1369 if (!(hif_dev->flags & HIF_USB_START)) 1370 ath9k_htc_suspend(hif_dev->htc_handle); 1371 1372 wait_for_completion(&hif_dev->fw_done); 1373 1374 if (hif_dev->flags & HIF_USB_READY) 1375 ath9k_hif_usb_dealloc_urbs(hif_dev); 1376 1377 return 0; 1378 } 1379 1380 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1381 { 1382 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1383 struct htc_target *htc_handle = hif_dev->htc_handle; 1384 int ret; 1385 const struct firmware *fw; 1386 1387 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1388 if (ret) 1389 return ret; 1390 1391 if (hif_dev->flags & HIF_USB_READY) { 1392 /* request cached firmware during suspend/resume cycle */ 1393 ret = request_firmware(&fw, hif_dev->fw_name, 1394 &hif_dev->udev->dev); 1395 if (ret) 1396 goto fail_resume; 1397 1398 hif_dev->fw_data = fw->data; 1399 hif_dev->fw_size = fw->size; 1400 ret = ath9k_hif_usb_download_fw(hif_dev); 1401 release_firmware(fw); 1402 if (ret) 1403 goto fail_resume; 1404 } else { 1405 ath9k_hif_usb_dealloc_urbs(hif_dev); 1406 return -EIO; 1407 } 1408 1409 mdelay(100); 1410 1411 ret = ath9k_htc_resume(htc_handle); 1412 1413 if (ret) 1414 goto fail_resume; 1415 1416 return 0; 1417 1418 fail_resume: 1419 ath9k_hif_usb_dealloc_urbs(hif_dev); 1420 1421 return ret; 1422 } 1423 #endif 1424 1425 static struct usb_driver ath9k_hif_usb_driver = { 1426 .name = KBUILD_MODNAME, 1427 .probe = ath9k_hif_usb_probe, 1428 .disconnect = ath9k_hif_usb_disconnect, 1429 #ifdef CONFIG_PM 1430 .suspend = ath9k_hif_usb_suspend, 1431 .resume = ath9k_hif_usb_resume, 1432 .reset_resume = ath9k_hif_usb_resume, 1433 #endif 1434 .id_table = ath9k_hif_usb_ids, 1435 .soft_unbind = 1, 1436 .disable_hub_initiated_lpm = 1, 1437 }; 1438 1439 int ath9k_hif_usb_init(void) 1440 { 1441 return usb_register(&ath9k_hif_usb_driver); 1442 } 1443 1444 void ath9k_hif_usb_exit(void) 1445 { 1446 usb_deregister(&ath9k_hif_usb_driver); 1447 } 1448