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(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */ 28 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */ 29 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */ 30 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */ 31 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */ 32 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */ 33 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */ 34 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */ 35 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */ 36 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */ 37 { USB_DEVICE(0x0cf3, 0xb002) }, /* Ubiquiti WifiStation */ 38 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */ 39 { USB_DEVICE(0x0471, 0x209e) }, /* Philips (or NXP) PTA01 */ 40 { USB_DEVICE(0x1eda, 0x2315) }, /* AirTies */ 41 42 { USB_DEVICE(0x0cf3, 0x7015), 43 .driver_info = AR9287_USB }, /* Atheros */ 44 { USB_DEVICE(0x1668, 0x1200), 45 .driver_info = AR9287_USB }, /* Verizon */ 46 47 { USB_DEVICE(0x0cf3, 0x7010), 48 .driver_info = AR9280_USB }, /* Atheros */ 49 { USB_DEVICE(0x0846, 0x9018), 50 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */ 51 { USB_DEVICE(0x083A, 0xA704), 52 .driver_info = AR9280_USB }, /* SMC Networks */ 53 { USB_DEVICE(0x0411, 0x017f), 54 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */ 55 { USB_DEVICE(0x0411, 0x0197), 56 .driver_info = AR9280_USB }, /* Buffalo WLI-UV-AG300P */ 57 { USB_DEVICE(0x04da, 0x3904), 58 .driver_info = AR9280_USB }, 59 { USB_DEVICE(0x0930, 0x0a08), 60 .driver_info = AR9280_USB }, /* Toshiba WLM-20U2 and GN-1080 */ 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 = 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 = 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 = 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 = 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 = 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, 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, 1002 USB_MSG_TIMEOUT); 1003 if (err < 0) { 1004 kfree(buf); 1005 return err; 1006 } 1007 1008 len -= transfer; 1009 data += transfer; 1010 addr += transfer; 1011 } 1012 kfree(buf); 1013 1014 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1015 firm_offset = AR7010_FIRMWARE_TEXT; 1016 else 1017 firm_offset = AR9271_FIRMWARE_TEXT; 1018 1019 /* 1020 * Issue FW download complete command to firmware. 1021 */ 1022 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1023 FIRMWARE_DOWNLOAD_COMP, 1024 0x40 | USB_DIR_OUT, 1025 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1026 if (err) 1027 return -EIO; 1028 1029 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1030 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1031 1032 return 0; 1033 } 1034 1035 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1036 { 1037 int ret; 1038 1039 ret = ath9k_hif_usb_download_fw(hif_dev); 1040 if (ret) { 1041 dev_err(&hif_dev->udev->dev, 1042 "ath9k_htc: Firmware - %s download failed\n", 1043 hif_dev->fw_name); 1044 return ret; 1045 } 1046 1047 /* Alloc URBs */ 1048 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1049 if (ret) { 1050 dev_err(&hif_dev->udev->dev, 1051 "ath9k_htc: Unable to allocate URBs\n"); 1052 return ret; 1053 } 1054 1055 return 0; 1056 } 1057 1058 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1059 { 1060 ath9k_hif_usb_dealloc_urbs(hif_dev); 1061 } 1062 1063 /* 1064 * If initialization fails or the FW cannot be retrieved, 1065 * detach the device. 1066 */ 1067 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1068 { 1069 struct device *dev = &hif_dev->udev->dev; 1070 struct device *parent = dev->parent; 1071 1072 complete_all(&hif_dev->fw_done); 1073 1074 if (parent) 1075 device_lock(parent); 1076 1077 device_release_driver(dev); 1078 1079 if (parent) 1080 device_unlock(parent); 1081 } 1082 1083 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1084 1085 /* taken from iwlwifi */ 1086 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1087 bool first) 1088 { 1089 char index[8], *chip; 1090 int ret; 1091 1092 if (first) { 1093 if (htc_use_dev_fw) { 1094 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1095 sprintf(index, "%s", "dev"); 1096 } else { 1097 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1098 sprintf(index, "%d", hif_dev->fw_minor_index); 1099 } 1100 } else { 1101 hif_dev->fw_minor_index--; 1102 sprintf(index, "%d", hif_dev->fw_minor_index); 1103 } 1104 1105 /* test for FW 1.3 */ 1106 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1107 const char *filename; 1108 1109 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1110 filename = FIRMWARE_AR7010_1_1; 1111 else 1112 filename = FIRMWARE_AR9271; 1113 1114 /* expected fw locations: 1115 * - htc_9271.fw (stable version 1.3, depricated) 1116 */ 1117 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1118 "%s", filename); 1119 1120 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1121 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1122 1123 return -ENOENT; 1124 } else { 1125 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1126 chip = "7010"; 1127 else 1128 chip = "9271"; 1129 1130 /* expected fw locations: 1131 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1132 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1133 */ 1134 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1135 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1136 chip, MAJOR_VERSION_REQ, index); 1137 } 1138 1139 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1140 &hif_dev->udev->dev, GFP_KERNEL, 1141 hif_dev, ath9k_hif_usb_firmware_cb); 1142 if (ret) { 1143 dev_err(&hif_dev->udev->dev, 1144 "ath9k_htc: Async request for firmware %s failed\n", 1145 hif_dev->fw_name); 1146 return ret; 1147 } 1148 1149 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1150 hif_dev->fw_name); 1151 1152 return ret; 1153 } 1154 1155 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1156 { 1157 struct hif_device_usb *hif_dev = context; 1158 int ret; 1159 1160 if (!fw) { 1161 ret = ath9k_hif_request_firmware(hif_dev, false); 1162 if (!ret) 1163 return; 1164 1165 dev_err(&hif_dev->udev->dev, 1166 "ath9k_htc: Failed to get firmware %s\n", 1167 hif_dev->fw_name); 1168 goto err_fw; 1169 } 1170 1171 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1172 &hif_dev->udev->dev); 1173 if (hif_dev->htc_handle == NULL) 1174 goto err_dev_alloc; 1175 1176 hif_dev->fw_data = fw->data; 1177 hif_dev->fw_size = fw->size; 1178 1179 /* Proceed with initialization */ 1180 1181 ret = ath9k_hif_usb_dev_init(hif_dev); 1182 if (ret) 1183 goto err_dev_init; 1184 1185 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1186 &hif_dev->interface->dev, 1187 hif_dev->usb_device_id->idProduct, 1188 hif_dev->udev->product, 1189 hif_dev->usb_device_id->driver_info); 1190 if (ret) { 1191 ret = -EINVAL; 1192 goto err_htc_hw_init; 1193 } 1194 1195 release_firmware(fw); 1196 hif_dev->flags |= HIF_USB_READY; 1197 complete_all(&hif_dev->fw_done); 1198 1199 return; 1200 1201 err_htc_hw_init: 1202 ath9k_hif_usb_dev_deinit(hif_dev); 1203 err_dev_init: 1204 ath9k_htc_hw_free(hif_dev->htc_handle); 1205 err_dev_alloc: 1206 release_firmware(fw); 1207 err_fw: 1208 ath9k_hif_usb_firmware_fail(hif_dev); 1209 } 1210 1211 /* 1212 * An exact copy of the function from zd1211rw. 1213 */ 1214 static int send_eject_command(struct usb_interface *interface) 1215 { 1216 struct usb_device *udev = interface_to_usbdev(interface); 1217 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1218 struct usb_endpoint_descriptor *endpoint; 1219 unsigned char *cmd; 1220 u8 bulk_out_ep; 1221 int r; 1222 1223 if (iface_desc->desc.bNumEndpoints < 2) 1224 return -ENODEV; 1225 1226 /* Find bulk out endpoint */ 1227 for (r = 1; r >= 0; r--) { 1228 endpoint = &iface_desc->endpoint[r].desc; 1229 if (usb_endpoint_dir_out(endpoint) && 1230 usb_endpoint_xfer_bulk(endpoint)) { 1231 bulk_out_ep = endpoint->bEndpointAddress; 1232 break; 1233 } 1234 } 1235 if (r == -1) { 1236 dev_err(&udev->dev, 1237 "ath9k_htc: Could not find bulk out endpoint\n"); 1238 return -ENODEV; 1239 } 1240 1241 cmd = kzalloc(31, GFP_KERNEL); 1242 if (cmd == NULL) 1243 return -ENODEV; 1244 1245 /* USB bulk command block */ 1246 cmd[0] = 0x55; /* bulk command signature */ 1247 cmd[1] = 0x53; /* bulk command signature */ 1248 cmd[2] = 0x42; /* bulk command signature */ 1249 cmd[3] = 0x43; /* bulk command signature */ 1250 cmd[14] = 6; /* command length */ 1251 1252 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1253 cmd[19] = 0x2; /* eject disc */ 1254 1255 dev_info(&udev->dev, "Ejecting storage device...\n"); 1256 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1257 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1258 kfree(cmd); 1259 if (r) 1260 return r; 1261 1262 /* At this point, the device disconnects and reconnects with the real 1263 * ID numbers. */ 1264 1265 usb_set_intfdata(interface, NULL); 1266 return 0; 1267 } 1268 1269 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1270 const struct usb_device_id *id) 1271 { 1272 struct usb_device *udev = interface_to_usbdev(interface); 1273 struct hif_device_usb *hif_dev; 1274 int ret = 0; 1275 1276 if (id->driver_info == STORAGE_DEVICE) 1277 return send_eject_command(interface); 1278 1279 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1280 if (!hif_dev) { 1281 ret = -ENOMEM; 1282 goto err_alloc; 1283 } 1284 1285 usb_get_dev(udev); 1286 1287 hif_dev->udev = udev; 1288 hif_dev->interface = interface; 1289 hif_dev->usb_device_id = id; 1290 #ifdef CONFIG_PM 1291 udev->reset_resume = 1; 1292 #endif 1293 usb_set_intfdata(interface, hif_dev); 1294 1295 init_completion(&hif_dev->fw_done); 1296 1297 ret = ath9k_hif_request_firmware(hif_dev, true); 1298 if (ret) 1299 goto err_fw_req; 1300 1301 return ret; 1302 1303 err_fw_req: 1304 usb_set_intfdata(interface, NULL); 1305 kfree(hif_dev); 1306 usb_put_dev(udev); 1307 err_alloc: 1308 return ret; 1309 } 1310 1311 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1312 { 1313 u32 reboot_cmd = 0xffffffff; 1314 void *buf; 1315 int ret; 1316 1317 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1318 if (!buf) 1319 return; 1320 1321 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1322 buf, 4, NULL, USB_MSG_TIMEOUT); 1323 if (ret) 1324 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1325 1326 kfree(buf); 1327 } 1328 1329 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1330 { 1331 struct usb_device *udev = interface_to_usbdev(interface); 1332 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1333 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1334 1335 if (!hif_dev) 1336 return; 1337 1338 wait_for_completion(&hif_dev->fw_done); 1339 1340 if (hif_dev->flags & HIF_USB_READY) { 1341 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1342 ath9k_htc_hw_free(hif_dev->htc_handle); 1343 ath9k_hif_usb_dev_deinit(hif_dev); 1344 } 1345 1346 usb_set_intfdata(interface, NULL); 1347 1348 /* If firmware was loaded we should drop it 1349 * go back to first stage bootloader. */ 1350 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1351 ath9k_hif_usb_reboot(udev); 1352 1353 kfree(hif_dev); 1354 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1355 usb_put_dev(udev); 1356 } 1357 1358 #ifdef CONFIG_PM 1359 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1360 pm_message_t message) 1361 { 1362 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1363 1364 /* 1365 * The device has to be set to FULLSLEEP mode in case no 1366 * interface is up. 1367 */ 1368 if (!(hif_dev->flags & HIF_USB_START)) 1369 ath9k_htc_suspend(hif_dev->htc_handle); 1370 1371 wait_for_completion(&hif_dev->fw_done); 1372 1373 if (hif_dev->flags & HIF_USB_READY) 1374 ath9k_hif_usb_dealloc_urbs(hif_dev); 1375 1376 return 0; 1377 } 1378 1379 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1380 { 1381 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1382 struct htc_target *htc_handle = hif_dev->htc_handle; 1383 int ret; 1384 const struct firmware *fw; 1385 1386 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1387 if (ret) 1388 return ret; 1389 1390 if (hif_dev->flags & HIF_USB_READY) { 1391 /* request cached firmware during suspend/resume cycle */ 1392 ret = request_firmware(&fw, hif_dev->fw_name, 1393 &hif_dev->udev->dev); 1394 if (ret) 1395 goto fail_resume; 1396 1397 hif_dev->fw_data = fw->data; 1398 hif_dev->fw_size = fw->size; 1399 ret = ath9k_hif_usb_download_fw(hif_dev); 1400 release_firmware(fw); 1401 if (ret) 1402 goto fail_resume; 1403 } else { 1404 ath9k_hif_usb_dealloc_urbs(hif_dev); 1405 return -EIO; 1406 } 1407 1408 mdelay(100); 1409 1410 ret = ath9k_htc_resume(htc_handle); 1411 1412 if (ret) 1413 goto fail_resume; 1414 1415 return 0; 1416 1417 fail_resume: 1418 ath9k_hif_usb_dealloc_urbs(hif_dev); 1419 1420 return ret; 1421 } 1422 #endif 1423 1424 static struct usb_driver ath9k_hif_usb_driver = { 1425 .name = KBUILD_MODNAME, 1426 .probe = ath9k_hif_usb_probe, 1427 .disconnect = ath9k_hif_usb_disconnect, 1428 #ifdef CONFIG_PM 1429 .suspend = ath9k_hif_usb_suspend, 1430 .resume = ath9k_hif_usb_resume, 1431 .reset_resume = ath9k_hif_usb_resume, 1432 #endif 1433 .id_table = ath9k_hif_usb_ids, 1434 .soft_unbind = 1, 1435 .disable_hub_initiated_lpm = 1, 1436 }; 1437 1438 int ath9k_hif_usb_init(void) 1439 { 1440 return usb_register(&ath9k_hif_usb_driver); 1441 } 1442 1443 void ath9k_hif_usb_exit(void) 1444 { 1445 usb_deregister(&ath9k_hif_usb_driver); 1446 } 1447