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 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) { 616 dev_err(&hif_dev->udev->dev, 617 "ath9k_htc: over RX MAX_PKT_NUM\n"); 618 goto err; 619 } 620 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 621 if (!nskb) { 622 dev_err(&hif_dev->udev->dev, 623 "ath9k_htc: RX memory allocation error\n"); 624 goto err; 625 } 626 skb_reserve(nskb, 32); 627 RX_STAT_INC(skb_allocated); 628 629 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 630 skb_put(nskb, pkt_len); 631 skb_pool[pool_index++] = nskb; 632 } 633 } 634 635 err: 636 for (i = 0; i < pool_index; i++) { 637 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 638 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 639 skb_pool[i]->len, USB_WLAN_RX_PIPE); 640 RX_STAT_INC(skb_completed); 641 } 642 } 643 644 static void ath9k_hif_usb_rx_cb(struct urb *urb) 645 { 646 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 647 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 648 struct sk_buff *skb = rx_buf->skb; 649 int ret; 650 651 if (!skb) 652 return; 653 654 if (!hif_dev) 655 goto free; 656 657 switch (urb->status) { 658 case 0: 659 break; 660 case -ENOENT: 661 case -ECONNRESET: 662 case -ENODEV: 663 case -ESHUTDOWN: 664 goto free; 665 default: 666 goto resubmit; 667 } 668 669 if (likely(urb->actual_length != 0)) { 670 skb_put(skb, urb->actual_length); 671 ath9k_hif_usb_rx_stream(hif_dev, skb); 672 } 673 674 resubmit: 675 skb_reset_tail_pointer(skb); 676 skb_trim(skb, 0); 677 678 usb_anchor_urb(urb, &hif_dev->rx_submitted); 679 ret = usb_submit_urb(urb, GFP_ATOMIC); 680 if (ret) { 681 usb_unanchor_urb(urb); 682 goto free; 683 } 684 685 return; 686 free: 687 kfree_skb(skb); 688 kfree(rx_buf); 689 } 690 691 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 692 { 693 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 694 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 695 struct sk_buff *skb = rx_buf->skb; 696 struct sk_buff *nskb; 697 int ret; 698 699 if (!skb) 700 return; 701 702 if (!hif_dev) 703 goto free; 704 705 switch (urb->status) { 706 case 0: 707 break; 708 case -ENOENT: 709 case -ECONNRESET: 710 case -ENODEV: 711 case -ESHUTDOWN: 712 goto free; 713 default: 714 skb_reset_tail_pointer(skb); 715 skb_trim(skb, 0); 716 717 goto resubmit; 718 } 719 720 if (likely(urb->actual_length != 0)) { 721 skb_put(skb, urb->actual_length); 722 723 /* Process the command first */ 724 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 725 skb->len, USB_REG_IN_PIPE); 726 727 728 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 729 if (!nskb) { 730 dev_err(&hif_dev->udev->dev, 731 "ath9k_htc: REG_IN memory allocation failure\n"); 732 urb->context = NULL; 733 return; 734 } 735 736 usb_fill_int_urb(urb, hif_dev->udev, 737 usb_rcvintpipe(hif_dev->udev, 738 USB_REG_IN_PIPE), 739 nskb->data, MAX_REG_IN_BUF_SIZE, 740 ath9k_hif_usb_reg_in_cb, nskb, 1); 741 } 742 743 resubmit: 744 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 745 ret = usb_submit_urb(urb, GFP_ATOMIC); 746 if (ret) { 747 usb_unanchor_urb(urb); 748 goto free; 749 } 750 751 return; 752 free: 753 kfree_skb(skb); 754 kfree(rx_buf); 755 urb->context = NULL; 756 } 757 758 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 759 { 760 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 761 unsigned long flags; 762 763 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 764 &hif_dev->tx.tx_buf, list) { 765 usb_kill_urb(tx_buf->urb); 766 list_del(&tx_buf->list); 767 usb_free_urb(tx_buf->urb); 768 kfree(tx_buf->buf); 769 kfree(tx_buf); 770 } 771 772 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 773 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 774 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 775 776 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 777 &hif_dev->tx.tx_pending, list) { 778 usb_kill_urb(tx_buf->urb); 779 list_del(&tx_buf->list); 780 usb_free_urb(tx_buf->urb); 781 kfree(tx_buf->buf); 782 kfree(tx_buf); 783 } 784 785 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 786 } 787 788 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 789 { 790 struct tx_buf *tx_buf; 791 int i; 792 793 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 794 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 795 spin_lock_init(&hif_dev->tx.tx_lock); 796 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 797 init_usb_anchor(&hif_dev->mgmt_submitted); 798 799 for (i = 0; i < MAX_TX_URB_NUM; i++) { 800 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL); 801 if (!tx_buf) 802 goto err; 803 804 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 805 if (!tx_buf->buf) 806 goto err; 807 808 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 809 if (!tx_buf->urb) 810 goto err; 811 812 tx_buf->hif_dev = hif_dev; 813 __skb_queue_head_init(&tx_buf->skb_queue); 814 815 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 816 } 817 818 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 819 820 return 0; 821 err: 822 if (tx_buf) { 823 kfree(tx_buf->buf); 824 kfree(tx_buf); 825 } 826 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 827 return -ENOMEM; 828 } 829 830 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 831 { 832 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 833 } 834 835 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 836 { 837 struct rx_buf *rx_buf = NULL; 838 struct sk_buff *skb = NULL; 839 struct urb *urb = NULL; 840 int i, ret; 841 842 init_usb_anchor(&hif_dev->rx_submitted); 843 spin_lock_init(&hif_dev->rx_lock); 844 845 for (i = 0; i < MAX_RX_URB_NUM; i++) { 846 847 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 848 if (!rx_buf) { 849 ret = -ENOMEM; 850 goto err_rxb; 851 } 852 853 /* Allocate URB */ 854 urb = usb_alloc_urb(0, GFP_KERNEL); 855 if (urb == NULL) { 856 ret = -ENOMEM; 857 goto err_urb; 858 } 859 860 /* Allocate buffer */ 861 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 862 if (!skb) { 863 ret = -ENOMEM; 864 goto err_skb; 865 } 866 867 rx_buf->hif_dev = hif_dev; 868 rx_buf->skb = skb; 869 870 usb_fill_bulk_urb(urb, hif_dev->udev, 871 usb_rcvbulkpipe(hif_dev->udev, 872 USB_WLAN_RX_PIPE), 873 skb->data, MAX_RX_BUF_SIZE, 874 ath9k_hif_usb_rx_cb, rx_buf); 875 876 /* Anchor URB */ 877 usb_anchor_urb(urb, &hif_dev->rx_submitted); 878 879 /* Submit URB */ 880 ret = usb_submit_urb(urb, GFP_KERNEL); 881 if (ret) { 882 usb_unanchor_urb(urb); 883 goto err_submit; 884 } 885 886 /* 887 * Drop reference count. 888 * This ensures that the URB is freed when killing them. 889 */ 890 usb_free_urb(urb); 891 } 892 893 return 0; 894 895 err_submit: 896 kfree_skb(skb); 897 err_skb: 898 usb_free_urb(urb); 899 err_urb: 900 kfree(rx_buf); 901 err_rxb: 902 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 903 return ret; 904 } 905 906 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 907 { 908 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 909 } 910 911 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 912 { 913 struct rx_buf *rx_buf = NULL; 914 struct sk_buff *skb = NULL; 915 struct urb *urb = NULL; 916 int i, ret; 917 918 init_usb_anchor(&hif_dev->reg_in_submitted); 919 920 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 921 922 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 923 if (!rx_buf) { 924 ret = -ENOMEM; 925 goto err_rxb; 926 } 927 928 /* Allocate URB */ 929 urb = usb_alloc_urb(0, GFP_KERNEL); 930 if (urb == NULL) { 931 ret = -ENOMEM; 932 goto err_urb; 933 } 934 935 /* Allocate buffer */ 936 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 937 if (!skb) { 938 ret = -ENOMEM; 939 goto err_skb; 940 } 941 942 rx_buf->hif_dev = hif_dev; 943 rx_buf->skb = skb; 944 945 usb_fill_int_urb(urb, hif_dev->udev, 946 usb_rcvintpipe(hif_dev->udev, 947 USB_REG_IN_PIPE), 948 skb->data, MAX_REG_IN_BUF_SIZE, 949 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 950 951 /* Anchor URB */ 952 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 953 954 /* Submit URB */ 955 ret = usb_submit_urb(urb, GFP_KERNEL); 956 if (ret) { 957 usb_unanchor_urb(urb); 958 goto err_submit; 959 } 960 961 /* 962 * Drop reference count. 963 * This ensures that the URB is freed when killing them. 964 */ 965 usb_free_urb(urb); 966 } 967 968 return 0; 969 970 err_submit: 971 kfree_skb(skb); 972 err_skb: 973 usb_free_urb(urb); 974 err_urb: 975 kfree(rx_buf); 976 err_rxb: 977 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 978 return ret; 979 } 980 981 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 982 { 983 /* Register Write */ 984 init_usb_anchor(&hif_dev->regout_submitted); 985 986 /* TX */ 987 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 988 goto err; 989 990 /* RX */ 991 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 992 goto err_rx; 993 994 /* Register Read */ 995 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 996 goto err_reg; 997 998 return 0; 999 err_reg: 1000 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1001 err_rx: 1002 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1003 err: 1004 return -ENOMEM; 1005 } 1006 1007 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 1008 { 1009 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 1010 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1011 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1012 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1013 } 1014 1015 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 1016 { 1017 int transfer, err; 1018 const void *data = hif_dev->fw_data; 1019 size_t len = hif_dev->fw_size; 1020 u32 addr = AR9271_FIRMWARE; 1021 u8 *buf = kzalloc(4096, GFP_KERNEL); 1022 u32 firm_offset; 1023 1024 if (!buf) 1025 return -ENOMEM; 1026 1027 while (len) { 1028 transfer = min_t(size_t, len, 4096); 1029 memcpy(buf, data, transfer); 1030 1031 err = usb_control_msg(hif_dev->udev, 1032 usb_sndctrlpipe(hif_dev->udev, 0), 1033 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1034 addr >> 8, 0, buf, transfer, 1035 USB_MSG_TIMEOUT); 1036 if (err < 0) { 1037 kfree(buf); 1038 return err; 1039 } 1040 1041 len -= transfer; 1042 data += transfer; 1043 addr += transfer; 1044 } 1045 kfree(buf); 1046 1047 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1048 firm_offset = AR7010_FIRMWARE_TEXT; 1049 else 1050 firm_offset = AR9271_FIRMWARE_TEXT; 1051 1052 /* 1053 * Issue FW download complete command to firmware. 1054 */ 1055 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1056 FIRMWARE_DOWNLOAD_COMP, 1057 0x40 | USB_DIR_OUT, 1058 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1059 if (err) 1060 return -EIO; 1061 1062 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1063 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1064 1065 return 0; 1066 } 1067 1068 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1069 { 1070 int ret; 1071 1072 ret = ath9k_hif_usb_download_fw(hif_dev); 1073 if (ret) { 1074 dev_err(&hif_dev->udev->dev, 1075 "ath9k_htc: Firmware - %s download failed\n", 1076 hif_dev->fw_name); 1077 return ret; 1078 } 1079 1080 /* Alloc URBs */ 1081 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1082 if (ret) { 1083 dev_err(&hif_dev->udev->dev, 1084 "ath9k_htc: Unable to allocate URBs\n"); 1085 return ret; 1086 } 1087 1088 return 0; 1089 } 1090 1091 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1092 { 1093 ath9k_hif_usb_dealloc_urbs(hif_dev); 1094 } 1095 1096 /* 1097 * If initialization fails or the FW cannot be retrieved, 1098 * detach the device. 1099 */ 1100 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1101 { 1102 struct device *dev = &hif_dev->udev->dev; 1103 struct device *parent = dev->parent; 1104 1105 complete_all(&hif_dev->fw_done); 1106 1107 if (parent) 1108 device_lock(parent); 1109 1110 device_release_driver(dev); 1111 1112 if (parent) 1113 device_unlock(parent); 1114 } 1115 1116 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1117 1118 /* taken from iwlwifi */ 1119 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1120 bool first) 1121 { 1122 char index[8], *chip; 1123 int ret; 1124 1125 if (first) { 1126 if (htc_use_dev_fw) { 1127 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1128 sprintf(index, "%s", "dev"); 1129 } else { 1130 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1131 sprintf(index, "%d", hif_dev->fw_minor_index); 1132 } 1133 } else { 1134 hif_dev->fw_minor_index--; 1135 sprintf(index, "%d", hif_dev->fw_minor_index); 1136 } 1137 1138 /* test for FW 1.3 */ 1139 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1140 const char *filename; 1141 1142 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1143 filename = FIRMWARE_AR7010_1_1; 1144 else 1145 filename = FIRMWARE_AR9271; 1146 1147 /* expected fw locations: 1148 * - htc_9271.fw (stable version 1.3, depricated) 1149 */ 1150 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1151 "%s", filename); 1152 1153 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1154 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1155 1156 return -ENOENT; 1157 } else { 1158 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1159 chip = "7010"; 1160 else 1161 chip = "9271"; 1162 1163 /* expected fw locations: 1164 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1165 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1166 */ 1167 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1168 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1169 chip, MAJOR_VERSION_REQ, index); 1170 } 1171 1172 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1173 &hif_dev->udev->dev, GFP_KERNEL, 1174 hif_dev, ath9k_hif_usb_firmware_cb); 1175 if (ret) { 1176 dev_err(&hif_dev->udev->dev, 1177 "ath9k_htc: Async request for firmware %s failed\n", 1178 hif_dev->fw_name); 1179 return ret; 1180 } 1181 1182 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1183 hif_dev->fw_name); 1184 1185 return ret; 1186 } 1187 1188 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1189 { 1190 struct hif_device_usb *hif_dev = context; 1191 int ret; 1192 1193 if (!fw) { 1194 ret = ath9k_hif_request_firmware(hif_dev, false); 1195 if (!ret) 1196 return; 1197 1198 dev_err(&hif_dev->udev->dev, 1199 "ath9k_htc: Failed to get firmware %s\n", 1200 hif_dev->fw_name); 1201 goto err_fw; 1202 } 1203 1204 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1205 &hif_dev->udev->dev); 1206 if (hif_dev->htc_handle == NULL) 1207 goto err_dev_alloc; 1208 1209 hif_dev->fw_data = fw->data; 1210 hif_dev->fw_size = fw->size; 1211 1212 /* Proceed with initialization */ 1213 1214 ret = ath9k_hif_usb_dev_init(hif_dev); 1215 if (ret) 1216 goto err_dev_init; 1217 1218 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1219 &hif_dev->interface->dev, 1220 hif_dev->usb_device_id->idProduct, 1221 hif_dev->udev->product, 1222 hif_dev->usb_device_id->driver_info); 1223 if (ret) { 1224 ret = -EINVAL; 1225 goto err_htc_hw_init; 1226 } 1227 1228 release_firmware(fw); 1229 hif_dev->flags |= HIF_USB_READY; 1230 complete_all(&hif_dev->fw_done); 1231 1232 return; 1233 1234 err_htc_hw_init: 1235 ath9k_hif_usb_dev_deinit(hif_dev); 1236 err_dev_init: 1237 ath9k_htc_hw_free(hif_dev->htc_handle); 1238 err_dev_alloc: 1239 release_firmware(fw); 1240 err_fw: 1241 ath9k_hif_usb_firmware_fail(hif_dev); 1242 } 1243 1244 /* 1245 * An exact copy of the function from zd1211rw. 1246 */ 1247 static int send_eject_command(struct usb_interface *interface) 1248 { 1249 struct usb_device *udev = interface_to_usbdev(interface); 1250 struct usb_host_interface *iface_desc = interface->cur_altsetting; 1251 struct usb_endpoint_descriptor *endpoint; 1252 unsigned char *cmd; 1253 u8 bulk_out_ep; 1254 int r; 1255 1256 if (iface_desc->desc.bNumEndpoints < 2) 1257 return -ENODEV; 1258 1259 /* Find bulk out endpoint */ 1260 for (r = 1; r >= 0; r--) { 1261 endpoint = &iface_desc->endpoint[r].desc; 1262 if (usb_endpoint_dir_out(endpoint) && 1263 usb_endpoint_xfer_bulk(endpoint)) { 1264 bulk_out_ep = endpoint->bEndpointAddress; 1265 break; 1266 } 1267 } 1268 if (r == -1) { 1269 dev_err(&udev->dev, 1270 "ath9k_htc: Could not find bulk out endpoint\n"); 1271 return -ENODEV; 1272 } 1273 1274 cmd = kzalloc(31, GFP_KERNEL); 1275 if (cmd == NULL) 1276 return -ENODEV; 1277 1278 /* USB bulk command block */ 1279 cmd[0] = 0x55; /* bulk command signature */ 1280 cmd[1] = 0x53; /* bulk command signature */ 1281 cmd[2] = 0x42; /* bulk command signature */ 1282 cmd[3] = 0x43; /* bulk command signature */ 1283 cmd[14] = 6; /* command length */ 1284 1285 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1286 cmd[19] = 0x2; /* eject disc */ 1287 1288 dev_info(&udev->dev, "Ejecting storage device...\n"); 1289 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1290 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1291 kfree(cmd); 1292 if (r) 1293 return r; 1294 1295 /* At this point, the device disconnects and reconnects with the real 1296 * ID numbers. */ 1297 1298 usb_set_intfdata(interface, NULL); 1299 return 0; 1300 } 1301 1302 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1303 const struct usb_device_id *id) 1304 { 1305 struct usb_device *udev = interface_to_usbdev(interface); 1306 struct hif_device_usb *hif_dev; 1307 int ret = 0; 1308 1309 if (id->driver_info == STORAGE_DEVICE) 1310 return send_eject_command(interface); 1311 1312 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1313 if (!hif_dev) { 1314 ret = -ENOMEM; 1315 goto err_alloc; 1316 } 1317 1318 usb_get_dev(udev); 1319 1320 hif_dev->udev = udev; 1321 hif_dev->interface = interface; 1322 hif_dev->usb_device_id = id; 1323 #ifdef CONFIG_PM 1324 udev->reset_resume = 1; 1325 #endif 1326 usb_set_intfdata(interface, hif_dev); 1327 1328 init_completion(&hif_dev->fw_done); 1329 1330 ret = ath9k_hif_request_firmware(hif_dev, true); 1331 if (ret) 1332 goto err_fw_req; 1333 1334 return ret; 1335 1336 err_fw_req: 1337 usb_set_intfdata(interface, NULL); 1338 kfree(hif_dev); 1339 usb_put_dev(udev); 1340 err_alloc: 1341 return ret; 1342 } 1343 1344 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1345 { 1346 u32 reboot_cmd = 0xffffffff; 1347 void *buf; 1348 int ret; 1349 1350 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1351 if (!buf) 1352 return; 1353 1354 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1355 buf, 4, NULL, USB_MSG_TIMEOUT); 1356 if (ret) 1357 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1358 1359 kfree(buf); 1360 } 1361 1362 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1363 { 1364 struct usb_device *udev = interface_to_usbdev(interface); 1365 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1366 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1367 1368 if (!hif_dev) 1369 return; 1370 1371 wait_for_completion(&hif_dev->fw_done); 1372 1373 if (hif_dev->flags & HIF_USB_READY) { 1374 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1375 ath9k_hif_usb_dev_deinit(hif_dev); 1376 ath9k_destoy_wmi(hif_dev->htc_handle->drv_priv); 1377 ath9k_htc_hw_free(hif_dev->htc_handle); 1378 } 1379 1380 usb_set_intfdata(interface, NULL); 1381 1382 /* If firmware was loaded we should drop it 1383 * go back to first stage bootloader. */ 1384 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1385 ath9k_hif_usb_reboot(udev); 1386 1387 kfree(hif_dev); 1388 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1389 usb_put_dev(udev); 1390 } 1391 1392 #ifdef CONFIG_PM 1393 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1394 pm_message_t message) 1395 { 1396 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1397 1398 /* 1399 * The device has to be set to FULLSLEEP mode in case no 1400 * interface is up. 1401 */ 1402 if (!(hif_dev->flags & HIF_USB_START)) 1403 ath9k_htc_suspend(hif_dev->htc_handle); 1404 1405 wait_for_completion(&hif_dev->fw_done); 1406 1407 if (hif_dev->flags & HIF_USB_READY) 1408 ath9k_hif_usb_dealloc_urbs(hif_dev); 1409 1410 return 0; 1411 } 1412 1413 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1414 { 1415 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1416 struct htc_target *htc_handle = hif_dev->htc_handle; 1417 int ret; 1418 const struct firmware *fw; 1419 1420 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1421 if (ret) 1422 return ret; 1423 1424 if (hif_dev->flags & HIF_USB_READY) { 1425 /* request cached firmware during suspend/resume cycle */ 1426 ret = request_firmware(&fw, hif_dev->fw_name, 1427 &hif_dev->udev->dev); 1428 if (ret) 1429 goto fail_resume; 1430 1431 hif_dev->fw_data = fw->data; 1432 hif_dev->fw_size = fw->size; 1433 ret = ath9k_hif_usb_download_fw(hif_dev); 1434 release_firmware(fw); 1435 if (ret) 1436 goto fail_resume; 1437 } else { 1438 ath9k_hif_usb_dealloc_urbs(hif_dev); 1439 return -EIO; 1440 } 1441 1442 mdelay(100); 1443 1444 ret = ath9k_htc_resume(htc_handle); 1445 1446 if (ret) 1447 goto fail_resume; 1448 1449 return 0; 1450 1451 fail_resume: 1452 ath9k_hif_usb_dealloc_urbs(hif_dev); 1453 1454 return ret; 1455 } 1456 #endif 1457 1458 static struct usb_driver ath9k_hif_usb_driver = { 1459 .name = KBUILD_MODNAME, 1460 .probe = ath9k_hif_usb_probe, 1461 .disconnect = ath9k_hif_usb_disconnect, 1462 #ifdef CONFIG_PM 1463 .suspend = ath9k_hif_usb_suspend, 1464 .resume = ath9k_hif_usb_resume, 1465 .reset_resume = ath9k_hif_usb_resume, 1466 #endif 1467 .id_table = ath9k_hif_usb_ids, 1468 .soft_unbind = 1, 1469 .disable_hub_initiated_lpm = 1, 1470 }; 1471 1472 int ath9k_hif_usb_init(void) 1473 { 1474 return usb_register(&ath9k_hif_usb_driver); 1475 } 1476 1477 void ath9k_hif_usb_exit(void) 1478 { 1479 usb_deregister(&ath9k_hif_usb_driver); 1480 } 1481