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 unsigned long flags; 142 bool txok = true; 143 144 if (!cmd || !cmd->skb || !cmd->hif_dev) 145 return; 146 147 hif_dev = cmd->hif_dev; 148 149 switch (urb->status) { 150 case 0: 151 break; 152 case -ENOENT: 153 case -ECONNRESET: 154 case -ENODEV: 155 case -ESHUTDOWN: 156 txok = false; 157 158 /* 159 * If the URBs are being flushed, no need to complete 160 * this packet. 161 */ 162 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 163 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 164 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 165 dev_kfree_skb_any(cmd->skb); 166 kfree(cmd); 167 return; 168 } 169 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 170 171 break; 172 default: 173 txok = false; 174 break; 175 } 176 177 skb_pull(cmd->skb, 4); 178 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 179 cmd->skb, txok); 180 kfree(cmd); 181 } 182 183 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 184 struct sk_buff *skb) 185 { 186 struct urb *urb; 187 struct cmd_buf *cmd; 188 int ret = 0; 189 __le16 *hdr; 190 191 urb = usb_alloc_urb(0, GFP_ATOMIC); 192 if (urb == NULL) 193 return -ENOMEM; 194 195 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 196 if (cmd == NULL) { 197 usb_free_urb(urb); 198 return -ENOMEM; 199 } 200 201 cmd->skb = skb; 202 cmd->hif_dev = hif_dev; 203 204 hdr = skb_push(skb, 4); 205 *hdr++ = cpu_to_le16(skb->len - 4); 206 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 207 208 usb_fill_bulk_urb(urb, hif_dev->udev, 209 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 210 skb->data, skb->len, 211 hif_usb_mgmt_cb, cmd); 212 213 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 214 ret = usb_submit_urb(urb, GFP_ATOMIC); 215 if (ret) { 216 usb_unanchor_urb(urb); 217 kfree(cmd); 218 } 219 usb_free_urb(urb); 220 221 return ret; 222 } 223 224 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 225 struct sk_buff_head *list) 226 { 227 struct sk_buff *skb; 228 229 while ((skb = __skb_dequeue(list)) != NULL) { 230 dev_kfree_skb_any(skb); 231 } 232 } 233 234 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 235 struct sk_buff_head *queue, 236 bool txok) 237 { 238 struct sk_buff *skb; 239 240 while ((skb = __skb_dequeue(queue)) != NULL) { 241 #ifdef CONFIG_ATH9K_HTC_DEBUGFS 242 int ln = skb->len; 243 #endif 244 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 245 skb, txok); 246 if (txok) { 247 TX_STAT_INC(skb_success); 248 TX_STAT_ADD(skb_success_bytes, ln); 249 } 250 else 251 TX_STAT_INC(skb_failed); 252 } 253 } 254 255 static void hif_usb_tx_cb(struct urb *urb) 256 { 257 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 258 struct hif_device_usb *hif_dev; 259 bool txok = true; 260 261 if (!tx_buf || !tx_buf->hif_dev) 262 return; 263 264 hif_dev = tx_buf->hif_dev; 265 266 switch (urb->status) { 267 case 0: 268 break; 269 case -ENOENT: 270 case -ECONNRESET: 271 case -ENODEV: 272 case -ESHUTDOWN: 273 txok = false; 274 275 /* 276 * If the URBs are being flushed, no need to add this 277 * URB to the free list. 278 */ 279 spin_lock(&hif_dev->tx.tx_lock); 280 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 281 spin_unlock(&hif_dev->tx.tx_lock); 282 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 283 return; 284 } 285 spin_unlock(&hif_dev->tx.tx_lock); 286 287 break; 288 default: 289 txok = false; 290 break; 291 } 292 293 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 294 295 /* Re-initialize the SKB queue */ 296 tx_buf->len = tx_buf->offset = 0; 297 __skb_queue_head_init(&tx_buf->skb_queue); 298 299 /* Add this TX buffer to the free list */ 300 spin_lock(&hif_dev->tx.tx_lock); 301 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 302 hif_dev->tx.tx_buf_cnt++; 303 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 304 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 305 TX_STAT_INC(buf_completed); 306 spin_unlock(&hif_dev->tx.tx_lock); 307 } 308 309 /* TX lock has to be taken */ 310 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 311 { 312 struct tx_buf *tx_buf = NULL; 313 struct sk_buff *nskb = NULL; 314 int ret = 0, i; 315 u16 tx_skb_cnt = 0; 316 u8 *buf; 317 __le16 *hdr; 318 319 if (hif_dev->tx.tx_skb_cnt == 0) 320 return 0; 321 322 /* Check if a free TX buffer is available */ 323 if (list_empty(&hif_dev->tx.tx_buf)) 324 return 0; 325 326 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 327 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 328 hif_dev->tx.tx_buf_cnt--; 329 330 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 331 332 for (i = 0; i < tx_skb_cnt; i++) { 333 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 334 335 /* Should never be NULL */ 336 BUG_ON(!nskb); 337 338 hif_dev->tx.tx_skb_cnt--; 339 340 buf = tx_buf->buf; 341 buf += tx_buf->offset; 342 hdr = (__le16 *)buf; 343 *hdr++ = cpu_to_le16(nskb->len); 344 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 345 buf += 4; 346 memcpy(buf, nskb->data, nskb->len); 347 tx_buf->len = nskb->len + 4; 348 349 if (i < (tx_skb_cnt - 1)) 350 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 351 352 if (i == (tx_skb_cnt - 1)) 353 tx_buf->len += tx_buf->offset; 354 355 __skb_queue_tail(&tx_buf->skb_queue, nskb); 356 TX_STAT_INC(skb_queued); 357 } 358 359 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 360 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 361 tx_buf->buf, tx_buf->len, 362 hif_usb_tx_cb, tx_buf); 363 364 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 365 if (ret) { 366 tx_buf->len = tx_buf->offset = 0; 367 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 368 __skb_queue_head_init(&tx_buf->skb_queue); 369 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 370 hif_dev->tx.tx_buf_cnt++; 371 } 372 373 if (!ret) 374 TX_STAT_INC(buf_queued); 375 376 return ret; 377 } 378 379 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 380 { 381 struct ath9k_htc_tx_ctl *tx_ctl; 382 unsigned long flags; 383 int ret = 0; 384 385 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 386 387 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 388 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 389 return -ENODEV; 390 } 391 392 /* Check if the max queue count has been reached */ 393 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 394 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 395 return -ENOMEM; 396 } 397 398 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 399 400 tx_ctl = HTC_SKB_CB(skb); 401 402 /* Mgmt/Beacon frames don't use the TX buffer pool */ 403 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 404 (tx_ctl->type == ATH9K_HTC_BEACON)) { 405 ret = hif_usb_send_mgmt(hif_dev, skb); 406 } 407 408 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 409 410 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 411 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 412 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 413 hif_dev->tx.tx_skb_cnt++; 414 } 415 416 /* Check if AMPDUs have to be sent immediately */ 417 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 418 (hif_dev->tx.tx_skb_cnt < 2)) { 419 __hif_usb_tx(hif_dev); 420 } 421 422 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 423 424 return ret; 425 } 426 427 static void hif_usb_start(void *hif_handle) 428 { 429 struct hif_device_usb *hif_dev = hif_handle; 430 unsigned long flags; 431 432 hif_dev->flags |= HIF_USB_START; 433 434 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 435 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 436 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 437 } 438 439 static void hif_usb_stop(void *hif_handle) 440 { 441 struct hif_device_usb *hif_dev = hif_handle; 442 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 443 unsigned long flags; 444 445 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 446 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 447 hif_dev->tx.tx_skb_cnt = 0; 448 hif_dev->tx.flags |= HIF_USB_TX_STOP; 449 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 450 451 /* The pending URBs have to be canceled. */ 452 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 453 &hif_dev->tx.tx_pending, list) { 454 usb_kill_urb(tx_buf->urb); 455 } 456 457 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 458 } 459 460 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 461 { 462 struct hif_device_usb *hif_dev = hif_handle; 463 int ret = 0; 464 465 switch (pipe_id) { 466 case USB_WLAN_TX_PIPE: 467 ret = hif_usb_send_tx(hif_dev, skb); 468 break; 469 case USB_REG_OUT_PIPE: 470 ret = hif_usb_send_regout(hif_dev, skb); 471 break; 472 default: 473 dev_err(&hif_dev->udev->dev, 474 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 475 ret = -EINVAL; 476 break; 477 } 478 479 return ret; 480 } 481 482 static inline bool check_index(struct sk_buff *skb, u8 idx) 483 { 484 struct ath9k_htc_tx_ctl *tx_ctl; 485 486 tx_ctl = HTC_SKB_CB(skb); 487 488 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 489 (tx_ctl->sta_idx == idx)) 490 return true; 491 492 return false; 493 } 494 495 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 496 { 497 struct hif_device_usb *hif_dev = hif_handle; 498 struct sk_buff *skb, *tmp; 499 unsigned long flags; 500 501 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 502 503 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 504 if (check_index(skb, idx)) { 505 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 506 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 507 skb, false); 508 hif_dev->tx.tx_skb_cnt--; 509 TX_STAT_INC(skb_failed); 510 } 511 } 512 513 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 514 } 515 516 static struct ath9k_htc_hif hif_usb = { 517 .transport = ATH9K_HIF_USB, 518 .name = "ath9k_hif_usb", 519 520 .control_ul_pipe = USB_REG_OUT_PIPE, 521 .control_dl_pipe = USB_REG_IN_PIPE, 522 523 .start = hif_usb_start, 524 .stop = hif_usb_stop, 525 .sta_drain = hif_usb_sta_drain, 526 .send = hif_usb_send, 527 }; 528 529 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 530 struct sk_buff *skb) 531 { 532 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 533 int index = 0, i, len = skb->len; 534 int rx_remain_len, rx_pkt_len; 535 u16 pool_index = 0; 536 u8 *ptr; 537 538 spin_lock(&hif_dev->rx_lock); 539 540 rx_remain_len = hif_dev->rx_remain_len; 541 rx_pkt_len = hif_dev->rx_transfer_len; 542 543 if (rx_remain_len != 0) { 544 struct sk_buff *remain_skb = hif_dev->remain_skb; 545 546 if (remain_skb) { 547 ptr = (u8 *) remain_skb->data; 548 549 index = rx_remain_len; 550 rx_remain_len -= hif_dev->rx_pad_len; 551 ptr += rx_pkt_len; 552 553 memcpy(ptr, skb->data, rx_remain_len); 554 555 rx_pkt_len += rx_remain_len; 556 hif_dev->rx_remain_len = 0; 557 skb_put(remain_skb, rx_pkt_len); 558 559 skb_pool[pool_index++] = remain_skb; 560 561 } else { 562 index = rx_remain_len; 563 } 564 } 565 566 spin_unlock(&hif_dev->rx_lock); 567 568 while (index < len) { 569 u16 pkt_len; 570 u16 pkt_tag; 571 u16 pad_len; 572 int chk_idx; 573 574 ptr = (u8 *) skb->data; 575 576 pkt_len = get_unaligned_le16(ptr + index); 577 pkt_tag = get_unaligned_le16(ptr + index + 2); 578 579 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 580 RX_STAT_INC(skb_dropped); 581 return; 582 } 583 584 pad_len = 4 - (pkt_len & 0x3); 585 if (pad_len == 4) 586 pad_len = 0; 587 588 chk_idx = index; 589 index = index + 4 + pkt_len + pad_len; 590 591 if (index > MAX_RX_BUF_SIZE) { 592 spin_lock(&hif_dev->rx_lock); 593 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 594 hif_dev->rx_transfer_len = 595 MAX_RX_BUF_SIZE - chk_idx - 4; 596 hif_dev->rx_pad_len = pad_len; 597 598 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 599 if (!nskb) { 600 dev_err(&hif_dev->udev->dev, 601 "ath9k_htc: RX memory allocation error\n"); 602 spin_unlock(&hif_dev->rx_lock); 603 goto err; 604 } 605 skb_reserve(nskb, 32); 606 RX_STAT_INC(skb_allocated); 607 608 memcpy(nskb->data, &(skb->data[chk_idx+4]), 609 hif_dev->rx_transfer_len); 610 611 /* Record the buffer pointer */ 612 hif_dev->remain_skb = nskb; 613 spin_unlock(&hif_dev->rx_lock); 614 } else { 615 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 616 if (!nskb) { 617 dev_err(&hif_dev->udev->dev, 618 "ath9k_htc: RX memory allocation error\n"); 619 goto err; 620 } 621 skb_reserve(nskb, 32); 622 RX_STAT_INC(skb_allocated); 623 624 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 625 skb_put(nskb, pkt_len); 626 skb_pool[pool_index++] = nskb; 627 } 628 } 629 630 err: 631 for (i = 0; i < pool_index; i++) { 632 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 633 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 634 skb_pool[i]->len, USB_WLAN_RX_PIPE); 635 RX_STAT_INC(skb_completed); 636 } 637 } 638 639 static void ath9k_hif_usb_rx_cb(struct urb *urb) 640 { 641 struct sk_buff *skb = (struct sk_buff *) urb->context; 642 struct hif_device_usb *hif_dev = 643 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 644 int ret; 645 646 if (!skb) 647 return; 648 649 if (!hif_dev) 650 goto free; 651 652 switch (urb->status) { 653 case 0: 654 break; 655 case -ENOENT: 656 case -ECONNRESET: 657 case -ENODEV: 658 case -ESHUTDOWN: 659 goto free; 660 default: 661 goto resubmit; 662 } 663 664 if (likely(urb->actual_length != 0)) { 665 skb_put(skb, urb->actual_length); 666 ath9k_hif_usb_rx_stream(hif_dev, skb); 667 } 668 669 resubmit: 670 skb_reset_tail_pointer(skb); 671 skb_trim(skb, 0); 672 673 usb_anchor_urb(urb, &hif_dev->rx_submitted); 674 ret = usb_submit_urb(urb, GFP_ATOMIC); 675 if (ret) { 676 usb_unanchor_urb(urb); 677 goto free; 678 } 679 680 return; 681 free: 682 kfree_skb(skb); 683 } 684 685 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 686 { 687 struct sk_buff *skb = (struct sk_buff *) urb->context; 688 struct sk_buff *nskb; 689 struct hif_device_usb *hif_dev = 690 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 691 int ret; 692 693 if (!skb) 694 return; 695 696 if (!hif_dev) 697 goto free; 698 699 switch (urb->status) { 700 case 0: 701 break; 702 case -ENOENT: 703 case -ECONNRESET: 704 case -ENODEV: 705 case -ESHUTDOWN: 706 goto free; 707 default: 708 skb_reset_tail_pointer(skb); 709 skb_trim(skb, 0); 710 711 goto resubmit; 712 } 713 714 if (likely(urb->actual_length != 0)) { 715 skb_put(skb, urb->actual_length); 716 717 /* Process the command first */ 718 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 719 skb->len, USB_REG_IN_PIPE); 720 721 722 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 723 if (!nskb) { 724 dev_err(&hif_dev->udev->dev, 725 "ath9k_htc: REG_IN memory allocation failure\n"); 726 urb->context = NULL; 727 return; 728 } 729 730 usb_fill_int_urb(urb, hif_dev->udev, 731 usb_rcvintpipe(hif_dev->udev, 732 USB_REG_IN_PIPE), 733 nskb->data, MAX_REG_IN_BUF_SIZE, 734 ath9k_hif_usb_reg_in_cb, nskb, 1); 735 } 736 737 resubmit: 738 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 739 ret = usb_submit_urb(urb, GFP_ATOMIC); 740 if (ret) { 741 usb_unanchor_urb(urb); 742 goto free; 743 } 744 745 return; 746 free: 747 kfree_skb(skb); 748 urb->context = NULL; 749 } 750 751 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 752 { 753 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 754 unsigned long flags; 755 756 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 757 &hif_dev->tx.tx_buf, list) { 758 usb_kill_urb(tx_buf->urb); 759 list_del(&tx_buf->list); 760 usb_free_urb(tx_buf->urb); 761 kfree(tx_buf->buf); 762 kfree(tx_buf); 763 } 764 765 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 766 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 767 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 768 769 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 770 &hif_dev->tx.tx_pending, list) { 771 usb_kill_urb(tx_buf->urb); 772 list_del(&tx_buf->list); 773 usb_free_urb(tx_buf->urb); 774 kfree(tx_buf->buf); 775 kfree(tx_buf); 776 } 777 778 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 779 } 780 781 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 782 { 783 struct tx_buf *tx_buf; 784 int i; 785 786 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 787 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 788 spin_lock_init(&hif_dev->tx.tx_lock); 789 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 790 init_usb_anchor(&hif_dev->mgmt_submitted); 791 792 for (i = 0; i < MAX_TX_URB_NUM; i++) { 793 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 794 if (!tx_buf) 795 goto err; 796 797 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 798 if (!tx_buf->buf) 799 goto err; 800 801 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 802 if (!tx_buf->urb) 803 goto err; 804 805 tx_buf->hif_dev = hif_dev; 806 __skb_queue_head_init(&tx_buf->skb_queue); 807 808 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 809 } 810 811 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 812 813 return 0; 814 err: 815 if (tx_buf) { 816 kfree(tx_buf->buf); 817 kfree(tx_buf); 818 } 819 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 820 return -ENOMEM; 821 } 822 823 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 824 { 825 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 826 } 827 828 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 829 { 830 struct urb *urb = NULL; 831 struct sk_buff *skb = NULL; 832 int i, ret; 833 834 init_usb_anchor(&hif_dev->rx_submitted); 835 spin_lock_init(&hif_dev->rx_lock); 836 837 for (i = 0; i < MAX_RX_URB_NUM; i++) { 838 839 /* Allocate URB */ 840 urb = usb_alloc_urb(0, GFP_KERNEL); 841 if (urb == NULL) { 842 ret = -ENOMEM; 843 goto err_urb; 844 } 845 846 /* Allocate buffer */ 847 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 848 if (!skb) { 849 ret = -ENOMEM; 850 goto err_skb; 851 } 852 853 usb_fill_bulk_urb(urb, hif_dev->udev, 854 usb_rcvbulkpipe(hif_dev->udev, 855 USB_WLAN_RX_PIPE), 856 skb->data, MAX_RX_BUF_SIZE, 857 ath9k_hif_usb_rx_cb, skb); 858 859 /* Anchor URB */ 860 usb_anchor_urb(urb, &hif_dev->rx_submitted); 861 862 /* Submit URB */ 863 ret = usb_submit_urb(urb, GFP_KERNEL); 864 if (ret) { 865 usb_unanchor_urb(urb); 866 goto err_submit; 867 } 868 869 /* 870 * Drop reference count. 871 * This ensures that the URB is freed when killing them. 872 */ 873 usb_free_urb(urb); 874 } 875 876 return 0; 877 878 err_submit: 879 kfree_skb(skb); 880 err_skb: 881 usb_free_urb(urb); 882 err_urb: 883 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 884 return ret; 885 } 886 887 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 888 { 889 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 890 } 891 892 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 893 { 894 struct urb *urb = NULL; 895 struct sk_buff *skb = NULL; 896 int i, ret; 897 898 init_usb_anchor(&hif_dev->reg_in_submitted); 899 900 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 901 902 /* Allocate URB */ 903 urb = usb_alloc_urb(0, GFP_KERNEL); 904 if (urb == NULL) { 905 ret = -ENOMEM; 906 goto err_urb; 907 } 908 909 /* Allocate buffer */ 910 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 911 if (!skb) { 912 ret = -ENOMEM; 913 goto err_skb; 914 } 915 916 usb_fill_int_urb(urb, hif_dev->udev, 917 usb_rcvintpipe(hif_dev->udev, 918 USB_REG_IN_PIPE), 919 skb->data, MAX_REG_IN_BUF_SIZE, 920 ath9k_hif_usb_reg_in_cb, skb, 1); 921 922 /* Anchor URB */ 923 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 924 925 /* Submit URB */ 926 ret = usb_submit_urb(urb, GFP_KERNEL); 927 if (ret) { 928 usb_unanchor_urb(urb); 929 goto err_submit; 930 } 931 932 /* 933 * Drop reference count. 934 * This ensures that the URB is freed when killing them. 935 */ 936 usb_free_urb(urb); 937 } 938 939 return 0; 940 941 err_submit: 942 kfree_skb(skb); 943 err_skb: 944 usb_free_urb(urb); 945 err_urb: 946 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 947 return ret; 948 } 949 950 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 951 { 952 /* Register Write */ 953 init_usb_anchor(&hif_dev->regout_submitted); 954 955 /* TX */ 956 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 957 goto err; 958 959 /* RX */ 960 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 961 goto err_rx; 962 963 /* Register Read */ 964 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 965 goto err_reg; 966 967 return 0; 968 err_reg: 969 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 970 err_rx: 971 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 972 err: 973 return -ENOMEM; 974 } 975 976 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 977 { 978 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 979 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 980 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 981 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 982 } 983 984 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 985 { 986 int transfer, err; 987 const void *data = hif_dev->fw_data; 988 size_t len = hif_dev->fw_size; 989 u32 addr = AR9271_FIRMWARE; 990 u8 *buf = kzalloc(4096, GFP_KERNEL); 991 u32 firm_offset; 992 993 if (!buf) 994 return -ENOMEM; 995 996 while (len) { 997 transfer = min_t(size_t, len, 4096); 998 memcpy(buf, data, transfer); 999 1000 err = usb_control_msg(hif_dev->udev, 1001 usb_sndctrlpipe(hif_dev->udev, 0), 1002 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1003 addr >> 8, 0, buf, transfer, 1004 USB_MSG_TIMEOUT); 1005 if (err < 0) { 1006 kfree(buf); 1007 return err; 1008 } 1009 1010 len -= transfer; 1011 data += transfer; 1012 addr += transfer; 1013 } 1014 kfree(buf); 1015 1016 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1017 firm_offset = AR7010_FIRMWARE_TEXT; 1018 else 1019 firm_offset = AR9271_FIRMWARE_TEXT; 1020 1021 /* 1022 * Issue FW download complete command to firmware. 1023 */ 1024 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1025 FIRMWARE_DOWNLOAD_COMP, 1026 0x40 | USB_DIR_OUT, 1027 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1028 if (err) 1029 return -EIO; 1030 1031 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1032 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1033 1034 return 0; 1035 } 1036 1037 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1038 { 1039 int ret; 1040 1041 ret = ath9k_hif_usb_download_fw(hif_dev); 1042 if (ret) { 1043 dev_err(&hif_dev->udev->dev, 1044 "ath9k_htc: Firmware - %s download failed\n", 1045 hif_dev->fw_name); 1046 return ret; 1047 } 1048 1049 /* Alloc URBs */ 1050 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1051 if (ret) { 1052 dev_err(&hif_dev->udev->dev, 1053 "ath9k_htc: Unable to allocate URBs\n"); 1054 return ret; 1055 } 1056 1057 return 0; 1058 } 1059 1060 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1061 { 1062 ath9k_hif_usb_dealloc_urbs(hif_dev); 1063 } 1064 1065 /* 1066 * If initialization fails or the FW cannot be retrieved, 1067 * detach the device. 1068 */ 1069 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1070 { 1071 struct device *dev = &hif_dev->udev->dev; 1072 struct device *parent = dev->parent; 1073 1074 complete_all(&hif_dev->fw_done); 1075 1076 if (parent) 1077 device_lock(parent); 1078 1079 device_release_driver(dev); 1080 1081 if (parent) 1082 device_unlock(parent); 1083 } 1084 1085 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1086 1087 /* taken from iwlwifi */ 1088 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1089 bool first) 1090 { 1091 char index[8], *chip; 1092 int ret; 1093 1094 if (first) { 1095 if (htc_use_dev_fw) { 1096 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1097 sprintf(index, "%s", "dev"); 1098 } else { 1099 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1100 sprintf(index, "%d", hif_dev->fw_minor_index); 1101 } 1102 } else { 1103 hif_dev->fw_minor_index--; 1104 sprintf(index, "%d", hif_dev->fw_minor_index); 1105 } 1106 1107 /* test for FW 1.3 */ 1108 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1109 const char *filename; 1110 1111 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1112 filename = FIRMWARE_AR7010_1_1; 1113 else 1114 filename = FIRMWARE_AR9271; 1115 1116 /* expected fw locations: 1117 * - htc_9271.fw (stable version 1.3, depricated) 1118 */ 1119 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1120 "%s", filename); 1121 1122 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1123 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1124 1125 return -ENOENT; 1126 } else { 1127 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1128 chip = "7010"; 1129 else 1130 chip = "9271"; 1131 1132 /* expected fw locations: 1133 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1134 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1135 */ 1136 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1137 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1138 chip, MAJOR_VERSION_REQ, index); 1139 } 1140 1141 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1142 &hif_dev->udev->dev, GFP_KERNEL, 1143 hif_dev, ath9k_hif_usb_firmware_cb); 1144 if (ret) { 1145 dev_err(&hif_dev->udev->dev, 1146 "ath9k_htc: Async request for firmware %s failed\n", 1147 hif_dev->fw_name); 1148 return ret; 1149 } 1150 1151 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1152 hif_dev->fw_name); 1153 1154 return ret; 1155 } 1156 1157 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1158 { 1159 struct hif_device_usb *hif_dev = context; 1160 int ret; 1161 1162 if (!fw) { 1163 ret = ath9k_hif_request_firmware(hif_dev, false); 1164 if (!ret) 1165 return; 1166 1167 dev_err(&hif_dev->udev->dev, 1168 "ath9k_htc: Failed to get firmware %s\n", 1169 hif_dev->fw_name); 1170 goto err_fw; 1171 } 1172 1173 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1174 &hif_dev->udev->dev); 1175 if (hif_dev->htc_handle == NULL) 1176 goto err_dev_alloc; 1177 1178 hif_dev->fw_data = fw->data; 1179 hif_dev->fw_size = fw->size; 1180 1181 /* Proceed with initialization */ 1182 1183 ret = ath9k_hif_usb_dev_init(hif_dev); 1184 if (ret) 1185 goto err_dev_init; 1186 1187 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1188 &hif_dev->interface->dev, 1189 hif_dev->usb_device_id->idProduct, 1190 hif_dev->udev->product, 1191 hif_dev->usb_device_id->driver_info); 1192 if (ret) { 1193 ret = -EINVAL; 1194 goto err_htc_hw_init; 1195 } 1196 1197 release_firmware(fw); 1198 hif_dev->flags |= HIF_USB_READY; 1199 complete_all(&hif_dev->fw_done); 1200 1201 return; 1202 1203 err_htc_hw_init: 1204 ath9k_hif_usb_dev_deinit(hif_dev); 1205 err_dev_init: 1206 ath9k_htc_hw_free(hif_dev->htc_handle); 1207 err_dev_alloc: 1208 release_firmware(fw); 1209 err_fw: 1210 ath9k_hif_usb_firmware_fail(hif_dev); 1211 } 1212 1213 /* 1214 * An exact copy of the function from zd1211rw. 1215 */ 1216 static int send_eject_command(struct usb_interface *interface) 1217 { 1218 struct usb_device *udev = interface_to_usbdev(interface); 1219 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1220 struct usb_endpoint_descriptor *endpoint; 1221 unsigned char *cmd; 1222 u8 bulk_out_ep; 1223 int r; 1224 1225 if (iface_desc->desc.bNumEndpoints < 2) 1226 return -ENODEV; 1227 1228 /* Find bulk out endpoint */ 1229 for (r = 1; r >= 0; r--) { 1230 endpoint = &iface_desc->endpoint[r].desc; 1231 if (usb_endpoint_dir_out(endpoint) && 1232 usb_endpoint_xfer_bulk(endpoint)) { 1233 bulk_out_ep = endpoint->bEndpointAddress; 1234 break; 1235 } 1236 } 1237 if (r == -1) { 1238 dev_err(&udev->dev, 1239 "ath9k_htc: Could not find bulk out endpoint\n"); 1240 return -ENODEV; 1241 } 1242 1243 cmd = kzalloc(31, GFP_KERNEL); 1244 if (cmd == NULL) 1245 return -ENODEV; 1246 1247 /* USB bulk command block */ 1248 cmd[0] = 0x55; /* bulk command signature */ 1249 cmd[1] = 0x53; /* bulk command signature */ 1250 cmd[2] = 0x42; /* bulk command signature */ 1251 cmd[3] = 0x43; /* bulk command signature */ 1252 cmd[14] = 6; /* command length */ 1253 1254 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1255 cmd[19] = 0x2; /* eject disc */ 1256 1257 dev_info(&udev->dev, "Ejecting storage device...\n"); 1258 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1259 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1260 kfree(cmd); 1261 if (r) 1262 return r; 1263 1264 /* At this point, the device disconnects and reconnects with the real 1265 * ID numbers. */ 1266 1267 usb_set_intfdata(interface, NULL); 1268 return 0; 1269 } 1270 1271 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1272 const struct usb_device_id *id) 1273 { 1274 struct usb_device *udev = interface_to_usbdev(interface); 1275 struct hif_device_usb *hif_dev; 1276 int ret = 0; 1277 1278 if (id->driver_info == STORAGE_DEVICE) 1279 return send_eject_command(interface); 1280 1281 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1282 if (!hif_dev) { 1283 ret = -ENOMEM; 1284 goto err_alloc; 1285 } 1286 1287 usb_get_dev(udev); 1288 1289 hif_dev->udev = udev; 1290 hif_dev->interface = interface; 1291 hif_dev->usb_device_id = id; 1292 #ifdef CONFIG_PM 1293 udev->reset_resume = 1; 1294 #endif 1295 usb_set_intfdata(interface, hif_dev); 1296 1297 init_completion(&hif_dev->fw_done); 1298 1299 ret = ath9k_hif_request_firmware(hif_dev, true); 1300 if (ret) 1301 goto err_fw_req; 1302 1303 return ret; 1304 1305 err_fw_req: 1306 usb_set_intfdata(interface, NULL); 1307 kfree(hif_dev); 1308 usb_put_dev(udev); 1309 err_alloc: 1310 return ret; 1311 } 1312 1313 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1314 { 1315 u32 reboot_cmd = 0xffffffff; 1316 void *buf; 1317 int ret; 1318 1319 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1320 if (!buf) 1321 return; 1322 1323 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1324 buf, 4, NULL, USB_MSG_TIMEOUT); 1325 if (ret) 1326 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1327 1328 kfree(buf); 1329 } 1330 1331 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1332 { 1333 struct usb_device *udev = interface_to_usbdev(interface); 1334 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1335 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1336 1337 if (!hif_dev) 1338 return; 1339 1340 wait_for_completion(&hif_dev->fw_done); 1341 1342 if (hif_dev->flags & HIF_USB_READY) { 1343 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1344 ath9k_htc_hw_free(hif_dev->htc_handle); 1345 ath9k_hif_usb_dev_deinit(hif_dev); 1346 } 1347 1348 usb_set_intfdata(interface, NULL); 1349 1350 /* If firmware was loaded we should drop it 1351 * go back to first stage bootloader. */ 1352 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1353 ath9k_hif_usb_reboot(udev); 1354 1355 kfree(hif_dev); 1356 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1357 usb_put_dev(udev); 1358 } 1359 1360 #ifdef CONFIG_PM 1361 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1362 pm_message_t message) 1363 { 1364 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1365 1366 /* 1367 * The device has to be set to FULLSLEEP mode in case no 1368 * interface is up. 1369 */ 1370 if (!(hif_dev->flags & HIF_USB_START)) 1371 ath9k_htc_suspend(hif_dev->htc_handle); 1372 1373 wait_for_completion(&hif_dev->fw_done); 1374 1375 if (hif_dev->flags & HIF_USB_READY) 1376 ath9k_hif_usb_dealloc_urbs(hif_dev); 1377 1378 return 0; 1379 } 1380 1381 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1382 { 1383 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1384 struct htc_target *htc_handle = hif_dev->htc_handle; 1385 int ret; 1386 const struct firmware *fw; 1387 1388 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1389 if (ret) 1390 return ret; 1391 1392 if (hif_dev->flags & HIF_USB_READY) { 1393 /* request cached firmware during suspend/resume cycle */ 1394 ret = request_firmware(&fw, hif_dev->fw_name, 1395 &hif_dev->udev->dev); 1396 if (ret) 1397 goto fail_resume; 1398 1399 hif_dev->fw_data = fw->data; 1400 hif_dev->fw_size = fw->size; 1401 ret = ath9k_hif_usb_download_fw(hif_dev); 1402 release_firmware(fw); 1403 if (ret) 1404 goto fail_resume; 1405 } else { 1406 ath9k_hif_usb_dealloc_urbs(hif_dev); 1407 return -EIO; 1408 } 1409 1410 mdelay(100); 1411 1412 ret = ath9k_htc_resume(htc_handle); 1413 1414 if (ret) 1415 goto fail_resume; 1416 1417 return 0; 1418 1419 fail_resume: 1420 ath9k_hif_usb_dealloc_urbs(hif_dev); 1421 1422 return ret; 1423 } 1424 #endif 1425 1426 static struct usb_driver ath9k_hif_usb_driver = { 1427 .name = KBUILD_MODNAME, 1428 .probe = ath9k_hif_usb_probe, 1429 .disconnect = ath9k_hif_usb_disconnect, 1430 #ifdef CONFIG_PM 1431 .suspend = ath9k_hif_usb_suspend, 1432 .resume = ath9k_hif_usb_resume, 1433 .reset_resume = ath9k_hif_usb_resume, 1434 #endif 1435 .id_table = ath9k_hif_usb_ids, 1436 .soft_unbind = 1, 1437 .disable_hub_initiated_lpm = 1, 1438 }; 1439 1440 int ath9k_hif_usb_init(void) 1441 { 1442 return usb_register(&ath9k_hif_usb_driver); 1443 } 1444 1445 void ath9k_hif_usb_exit(void) 1446 { 1447 usb_deregister(&ath9k_hif_usb_driver); 1448 } 1449