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 rx_buf->skb = nskb; 737 738 usb_fill_int_urb(urb, hif_dev->udev, 739 usb_rcvintpipe(hif_dev->udev, 740 USB_REG_IN_PIPE), 741 nskb->data, MAX_REG_IN_BUF_SIZE, 742 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 743 } 744 745 resubmit: 746 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 747 ret = usb_submit_urb(urb, GFP_ATOMIC); 748 if (ret) { 749 usb_unanchor_urb(urb); 750 goto free; 751 } 752 753 return; 754 free: 755 kfree_skb(skb); 756 kfree(rx_buf); 757 urb->context = NULL; 758 } 759 760 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 761 { 762 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 763 unsigned long flags; 764 765 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 766 &hif_dev->tx.tx_buf, list) { 767 usb_kill_urb(tx_buf->urb); 768 list_del(&tx_buf->list); 769 usb_free_urb(tx_buf->urb); 770 kfree(tx_buf->buf); 771 kfree(tx_buf); 772 } 773 774 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 775 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 776 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 777 778 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 779 &hif_dev->tx.tx_pending, list) { 780 usb_kill_urb(tx_buf->urb); 781 list_del(&tx_buf->list); 782 usb_free_urb(tx_buf->urb); 783 kfree(tx_buf->buf); 784 kfree(tx_buf); 785 } 786 787 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 788 } 789 790 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 791 { 792 struct tx_buf *tx_buf; 793 int i; 794 795 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 796 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 797 spin_lock_init(&hif_dev->tx.tx_lock); 798 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 799 init_usb_anchor(&hif_dev->mgmt_submitted); 800 801 for (i = 0; i < MAX_TX_URB_NUM; i++) { 802 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL); 803 if (!tx_buf) 804 goto err; 805 806 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 807 if (!tx_buf->buf) 808 goto err; 809 810 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 811 if (!tx_buf->urb) 812 goto err; 813 814 tx_buf->hif_dev = hif_dev; 815 __skb_queue_head_init(&tx_buf->skb_queue); 816 817 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 818 } 819 820 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 821 822 return 0; 823 err: 824 if (tx_buf) { 825 kfree(tx_buf->buf); 826 kfree(tx_buf); 827 } 828 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 829 return -ENOMEM; 830 } 831 832 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 833 { 834 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 835 } 836 837 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 838 { 839 struct rx_buf *rx_buf = NULL; 840 struct sk_buff *skb = NULL; 841 struct urb *urb = NULL; 842 int i, ret; 843 844 init_usb_anchor(&hif_dev->rx_submitted); 845 spin_lock_init(&hif_dev->rx_lock); 846 847 for (i = 0; i < MAX_RX_URB_NUM; i++) { 848 849 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 850 if (!rx_buf) { 851 ret = -ENOMEM; 852 goto err_rxb; 853 } 854 855 /* Allocate URB */ 856 urb = usb_alloc_urb(0, GFP_KERNEL); 857 if (urb == NULL) { 858 ret = -ENOMEM; 859 goto err_urb; 860 } 861 862 /* Allocate buffer */ 863 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 864 if (!skb) { 865 ret = -ENOMEM; 866 goto err_skb; 867 } 868 869 rx_buf->hif_dev = hif_dev; 870 rx_buf->skb = skb; 871 872 usb_fill_bulk_urb(urb, hif_dev->udev, 873 usb_rcvbulkpipe(hif_dev->udev, 874 USB_WLAN_RX_PIPE), 875 skb->data, MAX_RX_BUF_SIZE, 876 ath9k_hif_usb_rx_cb, rx_buf); 877 878 /* Anchor URB */ 879 usb_anchor_urb(urb, &hif_dev->rx_submitted); 880 881 /* Submit URB */ 882 ret = usb_submit_urb(urb, GFP_KERNEL); 883 if (ret) { 884 usb_unanchor_urb(urb); 885 goto err_submit; 886 } 887 888 /* 889 * Drop reference count. 890 * This ensures that the URB is freed when killing them. 891 */ 892 usb_free_urb(urb); 893 } 894 895 return 0; 896 897 err_submit: 898 kfree_skb(skb); 899 err_skb: 900 usb_free_urb(urb); 901 err_urb: 902 kfree(rx_buf); 903 err_rxb: 904 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 905 return ret; 906 } 907 908 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 909 { 910 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 911 } 912 913 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 914 { 915 struct rx_buf *rx_buf = NULL; 916 struct sk_buff *skb = NULL; 917 struct urb *urb = NULL; 918 int i, ret; 919 920 init_usb_anchor(&hif_dev->reg_in_submitted); 921 922 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 923 924 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 925 if (!rx_buf) { 926 ret = -ENOMEM; 927 goto err_rxb; 928 } 929 930 /* Allocate URB */ 931 urb = usb_alloc_urb(0, GFP_KERNEL); 932 if (urb == NULL) { 933 ret = -ENOMEM; 934 goto err_urb; 935 } 936 937 /* Allocate buffer */ 938 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 939 if (!skb) { 940 ret = -ENOMEM; 941 goto err_skb; 942 } 943 944 rx_buf->hif_dev = hif_dev; 945 rx_buf->skb = skb; 946 947 usb_fill_int_urb(urb, hif_dev->udev, 948 usb_rcvintpipe(hif_dev->udev, 949 USB_REG_IN_PIPE), 950 skb->data, MAX_REG_IN_BUF_SIZE, 951 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 952 953 /* Anchor URB */ 954 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 955 956 /* Submit URB */ 957 ret = usb_submit_urb(urb, GFP_KERNEL); 958 if (ret) { 959 usb_unanchor_urb(urb); 960 goto err_submit; 961 } 962 963 /* 964 * Drop reference count. 965 * This ensures that the URB is freed when killing them. 966 */ 967 usb_free_urb(urb); 968 } 969 970 return 0; 971 972 err_submit: 973 kfree_skb(skb); 974 err_skb: 975 usb_free_urb(urb); 976 err_urb: 977 kfree(rx_buf); 978 err_rxb: 979 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 980 return ret; 981 } 982 983 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 984 { 985 /* Register Write */ 986 init_usb_anchor(&hif_dev->regout_submitted); 987 988 /* TX */ 989 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 990 goto err; 991 992 /* RX */ 993 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 994 goto err_rx; 995 996 /* Register Read */ 997 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 998 goto err_reg; 999 1000 return 0; 1001 err_reg: 1002 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1003 err_rx: 1004 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1005 err: 1006 return -ENOMEM; 1007 } 1008 1009 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 1010 { 1011 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 1012 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1013 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1014 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1015 } 1016 1017 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 1018 { 1019 int transfer, err; 1020 const void *data = hif_dev->fw_data; 1021 size_t len = hif_dev->fw_size; 1022 u32 addr = AR9271_FIRMWARE; 1023 u8 *buf = kzalloc(4096, GFP_KERNEL); 1024 u32 firm_offset; 1025 1026 if (!buf) 1027 return -ENOMEM; 1028 1029 while (len) { 1030 transfer = min_t(size_t, len, 4096); 1031 memcpy(buf, data, transfer); 1032 1033 err = usb_control_msg(hif_dev->udev, 1034 usb_sndctrlpipe(hif_dev->udev, 0), 1035 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1036 addr >> 8, 0, buf, transfer, 1037 USB_MSG_TIMEOUT); 1038 if (err < 0) { 1039 kfree(buf); 1040 return err; 1041 } 1042 1043 len -= transfer; 1044 data += transfer; 1045 addr += transfer; 1046 } 1047 kfree(buf); 1048 1049 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1050 firm_offset = AR7010_FIRMWARE_TEXT; 1051 else 1052 firm_offset = AR9271_FIRMWARE_TEXT; 1053 1054 /* 1055 * Issue FW download complete command to firmware. 1056 */ 1057 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1058 FIRMWARE_DOWNLOAD_COMP, 1059 0x40 | USB_DIR_OUT, 1060 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1061 if (err) 1062 return -EIO; 1063 1064 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1065 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1066 1067 return 0; 1068 } 1069 1070 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1071 { 1072 int ret; 1073 1074 ret = ath9k_hif_usb_download_fw(hif_dev); 1075 if (ret) { 1076 dev_err(&hif_dev->udev->dev, 1077 "ath9k_htc: Firmware - %s download failed\n", 1078 hif_dev->fw_name); 1079 return ret; 1080 } 1081 1082 /* Alloc URBs */ 1083 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1084 if (ret) { 1085 dev_err(&hif_dev->udev->dev, 1086 "ath9k_htc: Unable to allocate URBs\n"); 1087 return ret; 1088 } 1089 1090 return 0; 1091 } 1092 1093 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1094 { 1095 ath9k_hif_usb_dealloc_urbs(hif_dev); 1096 } 1097 1098 /* 1099 * If initialization fails or the FW cannot be retrieved, 1100 * detach the device. 1101 */ 1102 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1103 { 1104 struct device *dev = &hif_dev->udev->dev; 1105 struct device *parent = dev->parent; 1106 1107 complete_all(&hif_dev->fw_done); 1108 1109 if (parent) 1110 device_lock(parent); 1111 1112 device_release_driver(dev); 1113 1114 if (parent) 1115 device_unlock(parent); 1116 } 1117 1118 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1119 1120 /* taken from iwlwifi */ 1121 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1122 bool first) 1123 { 1124 char index[8], *chip; 1125 int ret; 1126 1127 if (first) { 1128 if (htc_use_dev_fw) { 1129 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1130 sprintf(index, "%s", "dev"); 1131 } else { 1132 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1133 sprintf(index, "%d", hif_dev->fw_minor_index); 1134 } 1135 } else { 1136 hif_dev->fw_minor_index--; 1137 sprintf(index, "%d", hif_dev->fw_minor_index); 1138 } 1139 1140 /* test for FW 1.3 */ 1141 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1142 const char *filename; 1143 1144 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1145 filename = FIRMWARE_AR7010_1_1; 1146 else 1147 filename = FIRMWARE_AR9271; 1148 1149 /* expected fw locations: 1150 * - htc_9271.fw (stable version 1.3, depricated) 1151 */ 1152 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1153 "%s", filename); 1154 1155 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1156 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1157 1158 return -ENOENT; 1159 } else { 1160 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1161 chip = "7010"; 1162 else 1163 chip = "9271"; 1164 1165 /* expected fw locations: 1166 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1167 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1168 */ 1169 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1170 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1171 chip, MAJOR_VERSION_REQ, index); 1172 } 1173 1174 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1175 &hif_dev->udev->dev, GFP_KERNEL, 1176 hif_dev, ath9k_hif_usb_firmware_cb); 1177 if (ret) { 1178 dev_err(&hif_dev->udev->dev, 1179 "ath9k_htc: Async request for firmware %s failed\n", 1180 hif_dev->fw_name); 1181 return ret; 1182 } 1183 1184 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1185 hif_dev->fw_name); 1186 1187 return ret; 1188 } 1189 1190 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1191 { 1192 struct hif_device_usb *hif_dev = context; 1193 int ret; 1194 1195 if (!fw) { 1196 ret = ath9k_hif_request_firmware(hif_dev, false); 1197 if (!ret) 1198 return; 1199 1200 dev_err(&hif_dev->udev->dev, 1201 "ath9k_htc: Failed to get firmware %s\n", 1202 hif_dev->fw_name); 1203 goto err_fw; 1204 } 1205 1206 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1207 &hif_dev->udev->dev); 1208 if (hif_dev->htc_handle == NULL) 1209 goto err_dev_alloc; 1210 1211 hif_dev->fw_data = fw->data; 1212 hif_dev->fw_size = fw->size; 1213 1214 /* Proceed with initialization */ 1215 1216 ret = ath9k_hif_usb_dev_init(hif_dev); 1217 if (ret) 1218 goto err_dev_init; 1219 1220 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1221 &hif_dev->interface->dev, 1222 hif_dev->usb_device_id->idProduct, 1223 hif_dev->udev->product, 1224 hif_dev->usb_device_id->driver_info); 1225 if (ret) { 1226 ret = -EINVAL; 1227 goto err_htc_hw_init; 1228 } 1229 1230 release_firmware(fw); 1231 hif_dev->flags |= HIF_USB_READY; 1232 complete_all(&hif_dev->fw_done); 1233 1234 return; 1235 1236 err_htc_hw_init: 1237 ath9k_hif_usb_dev_deinit(hif_dev); 1238 err_dev_init: 1239 ath9k_htc_hw_free(hif_dev->htc_handle); 1240 err_dev_alloc: 1241 release_firmware(fw); 1242 err_fw: 1243 ath9k_hif_usb_firmware_fail(hif_dev); 1244 } 1245 1246 /* 1247 * An exact copy of the function from zd1211rw. 1248 */ 1249 static int send_eject_command(struct usb_interface *interface) 1250 { 1251 struct usb_device *udev = interface_to_usbdev(interface); 1252 struct usb_host_interface *iface_desc = interface->cur_altsetting; 1253 struct usb_endpoint_descriptor *endpoint; 1254 unsigned char *cmd; 1255 u8 bulk_out_ep; 1256 int r; 1257 1258 if (iface_desc->desc.bNumEndpoints < 2) 1259 return -ENODEV; 1260 1261 /* Find bulk out endpoint */ 1262 for (r = 1; r >= 0; r--) { 1263 endpoint = &iface_desc->endpoint[r].desc; 1264 if (usb_endpoint_dir_out(endpoint) && 1265 usb_endpoint_xfer_bulk(endpoint)) { 1266 bulk_out_ep = endpoint->bEndpointAddress; 1267 break; 1268 } 1269 } 1270 if (r == -1) { 1271 dev_err(&udev->dev, 1272 "ath9k_htc: Could not find bulk out endpoint\n"); 1273 return -ENODEV; 1274 } 1275 1276 cmd = kzalloc(31, GFP_KERNEL); 1277 if (cmd == NULL) 1278 return -ENODEV; 1279 1280 /* USB bulk command block */ 1281 cmd[0] = 0x55; /* bulk command signature */ 1282 cmd[1] = 0x53; /* bulk command signature */ 1283 cmd[2] = 0x42; /* bulk command signature */ 1284 cmd[3] = 0x43; /* bulk command signature */ 1285 cmd[14] = 6; /* command length */ 1286 1287 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1288 cmd[19] = 0x2; /* eject disc */ 1289 1290 dev_info(&udev->dev, "Ejecting storage device...\n"); 1291 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1292 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1293 kfree(cmd); 1294 if (r) 1295 return r; 1296 1297 /* At this point, the device disconnects and reconnects with the real 1298 * ID numbers. */ 1299 1300 usb_set_intfdata(interface, NULL); 1301 return 0; 1302 } 1303 1304 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1305 const struct usb_device_id *id) 1306 { 1307 struct usb_device *udev = interface_to_usbdev(interface); 1308 struct hif_device_usb *hif_dev; 1309 int ret = 0; 1310 1311 if (id->driver_info == STORAGE_DEVICE) 1312 return send_eject_command(interface); 1313 1314 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1315 if (!hif_dev) { 1316 ret = -ENOMEM; 1317 goto err_alloc; 1318 } 1319 1320 usb_get_dev(udev); 1321 1322 hif_dev->udev = udev; 1323 hif_dev->interface = interface; 1324 hif_dev->usb_device_id = id; 1325 #ifdef CONFIG_PM 1326 udev->reset_resume = 1; 1327 #endif 1328 usb_set_intfdata(interface, hif_dev); 1329 1330 init_completion(&hif_dev->fw_done); 1331 1332 ret = ath9k_hif_request_firmware(hif_dev, true); 1333 if (ret) 1334 goto err_fw_req; 1335 1336 return ret; 1337 1338 err_fw_req: 1339 usb_set_intfdata(interface, NULL); 1340 kfree(hif_dev); 1341 usb_put_dev(udev); 1342 err_alloc: 1343 return ret; 1344 } 1345 1346 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1347 { 1348 u32 reboot_cmd = 0xffffffff; 1349 void *buf; 1350 int ret; 1351 1352 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1353 if (!buf) 1354 return; 1355 1356 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1357 buf, 4, NULL, USB_MSG_TIMEOUT); 1358 if (ret) 1359 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1360 1361 kfree(buf); 1362 } 1363 1364 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1365 { 1366 struct usb_device *udev = interface_to_usbdev(interface); 1367 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1368 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1369 1370 if (!hif_dev) 1371 return; 1372 1373 wait_for_completion(&hif_dev->fw_done); 1374 1375 if (hif_dev->flags & HIF_USB_READY) { 1376 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1377 ath9k_hif_usb_dev_deinit(hif_dev); 1378 ath9k_destoy_wmi(hif_dev->htc_handle->drv_priv); 1379 ath9k_htc_hw_free(hif_dev->htc_handle); 1380 } 1381 1382 usb_set_intfdata(interface, NULL); 1383 1384 /* If firmware was loaded we should drop it 1385 * go back to first stage bootloader. */ 1386 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1387 ath9k_hif_usb_reboot(udev); 1388 1389 kfree(hif_dev); 1390 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1391 usb_put_dev(udev); 1392 } 1393 1394 #ifdef CONFIG_PM 1395 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1396 pm_message_t message) 1397 { 1398 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1399 1400 /* 1401 * The device has to be set to FULLSLEEP mode in case no 1402 * interface is up. 1403 */ 1404 if (!(hif_dev->flags & HIF_USB_START)) 1405 ath9k_htc_suspend(hif_dev->htc_handle); 1406 1407 wait_for_completion(&hif_dev->fw_done); 1408 1409 if (hif_dev->flags & HIF_USB_READY) 1410 ath9k_hif_usb_dealloc_urbs(hif_dev); 1411 1412 return 0; 1413 } 1414 1415 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1416 { 1417 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1418 struct htc_target *htc_handle = hif_dev->htc_handle; 1419 int ret; 1420 const struct firmware *fw; 1421 1422 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1423 if (ret) 1424 return ret; 1425 1426 if (hif_dev->flags & HIF_USB_READY) { 1427 /* request cached firmware during suspend/resume cycle */ 1428 ret = request_firmware(&fw, hif_dev->fw_name, 1429 &hif_dev->udev->dev); 1430 if (ret) 1431 goto fail_resume; 1432 1433 hif_dev->fw_data = fw->data; 1434 hif_dev->fw_size = fw->size; 1435 ret = ath9k_hif_usb_download_fw(hif_dev); 1436 release_firmware(fw); 1437 if (ret) 1438 goto fail_resume; 1439 } else { 1440 ath9k_hif_usb_dealloc_urbs(hif_dev); 1441 return -EIO; 1442 } 1443 1444 mdelay(100); 1445 1446 ret = ath9k_htc_resume(htc_handle); 1447 1448 if (ret) 1449 goto fail_resume; 1450 1451 return 0; 1452 1453 fail_resume: 1454 ath9k_hif_usb_dealloc_urbs(hif_dev); 1455 1456 return ret; 1457 } 1458 #endif 1459 1460 static struct usb_driver ath9k_hif_usb_driver = { 1461 .name = KBUILD_MODNAME, 1462 .probe = ath9k_hif_usb_probe, 1463 .disconnect = ath9k_hif_usb_disconnect, 1464 #ifdef CONFIG_PM 1465 .suspend = ath9k_hif_usb_suspend, 1466 .resume = ath9k_hif_usb_resume, 1467 .reset_resume = ath9k_hif_usb_resume, 1468 #endif 1469 .id_table = ath9k_hif_usb_ids, 1470 .soft_unbind = 1, 1471 .disable_hub_initiated_lpm = 1, 1472 }; 1473 1474 int ath9k_hif_usb_init(void) 1475 { 1476 return usb_register(&ath9k_hif_usb_driver); 1477 } 1478 1479 void ath9k_hif_usb_exit(void) 1480 { 1481 usb_deregister(&ath9k_hif_usb_driver); 1482 } 1483