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 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 453 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 454 &hif_dev->tx.tx_pending, list) { 455 usb_get_urb(tx_buf->urb); 456 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 457 usb_kill_urb(tx_buf->urb); 458 list_del(&tx_buf->list); 459 usb_free_urb(tx_buf->urb); 460 kfree(tx_buf->buf); 461 kfree(tx_buf); 462 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 463 } 464 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 465 466 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 467 } 468 469 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 470 { 471 struct hif_device_usb *hif_dev = hif_handle; 472 int ret = 0; 473 474 switch (pipe_id) { 475 case USB_WLAN_TX_PIPE: 476 ret = hif_usb_send_tx(hif_dev, skb); 477 break; 478 case USB_REG_OUT_PIPE: 479 ret = hif_usb_send_regout(hif_dev, skb); 480 break; 481 default: 482 dev_err(&hif_dev->udev->dev, 483 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 484 ret = -EINVAL; 485 break; 486 } 487 488 return ret; 489 } 490 491 static inline bool check_index(struct sk_buff *skb, u8 idx) 492 { 493 struct ath9k_htc_tx_ctl *tx_ctl; 494 495 tx_ctl = HTC_SKB_CB(skb); 496 497 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 498 (tx_ctl->sta_idx == idx)) 499 return true; 500 501 return false; 502 } 503 504 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 505 { 506 struct hif_device_usb *hif_dev = hif_handle; 507 struct sk_buff *skb, *tmp; 508 unsigned long flags; 509 510 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 511 512 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 513 if (check_index(skb, idx)) { 514 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 515 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 516 skb, false); 517 hif_dev->tx.tx_skb_cnt--; 518 TX_STAT_INC(skb_failed); 519 } 520 } 521 522 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 523 } 524 525 static struct ath9k_htc_hif hif_usb = { 526 .transport = ATH9K_HIF_USB, 527 .name = "ath9k_hif_usb", 528 529 .control_ul_pipe = USB_REG_OUT_PIPE, 530 .control_dl_pipe = USB_REG_IN_PIPE, 531 532 .start = hif_usb_start, 533 .stop = hif_usb_stop, 534 .sta_drain = hif_usb_sta_drain, 535 .send = hif_usb_send, 536 }; 537 538 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 539 struct sk_buff *skb) 540 { 541 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 542 int index = 0, i, len = skb->len; 543 int rx_remain_len, rx_pkt_len; 544 u16 pool_index = 0; 545 u8 *ptr; 546 547 spin_lock(&hif_dev->rx_lock); 548 549 rx_remain_len = hif_dev->rx_remain_len; 550 rx_pkt_len = hif_dev->rx_transfer_len; 551 552 if (rx_remain_len != 0) { 553 struct sk_buff *remain_skb = hif_dev->remain_skb; 554 555 if (remain_skb) { 556 ptr = (u8 *) remain_skb->data; 557 558 index = rx_remain_len; 559 rx_remain_len -= hif_dev->rx_pad_len; 560 ptr += rx_pkt_len; 561 562 memcpy(ptr, skb->data, rx_remain_len); 563 564 rx_pkt_len += rx_remain_len; 565 hif_dev->rx_remain_len = 0; 566 skb_put(remain_skb, rx_pkt_len); 567 568 skb_pool[pool_index++] = remain_skb; 569 570 } else { 571 index = rx_remain_len; 572 } 573 } 574 575 spin_unlock(&hif_dev->rx_lock); 576 577 while (index < len) { 578 u16 pkt_len; 579 u16 pkt_tag; 580 u16 pad_len; 581 int chk_idx; 582 583 ptr = (u8 *) skb->data; 584 585 pkt_len = get_unaligned_le16(ptr + index); 586 pkt_tag = get_unaligned_le16(ptr + index + 2); 587 588 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 589 RX_STAT_INC(skb_dropped); 590 return; 591 } 592 593 pad_len = 4 - (pkt_len & 0x3); 594 if (pad_len == 4) 595 pad_len = 0; 596 597 chk_idx = index; 598 index = index + 4 + pkt_len + pad_len; 599 600 if (index > MAX_RX_BUF_SIZE) { 601 spin_lock(&hif_dev->rx_lock); 602 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 603 hif_dev->rx_transfer_len = 604 MAX_RX_BUF_SIZE - chk_idx - 4; 605 hif_dev->rx_pad_len = pad_len; 606 607 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 608 if (!nskb) { 609 dev_err(&hif_dev->udev->dev, 610 "ath9k_htc: RX memory allocation error\n"); 611 spin_unlock(&hif_dev->rx_lock); 612 goto err; 613 } 614 skb_reserve(nskb, 32); 615 RX_STAT_INC(skb_allocated); 616 617 memcpy(nskb->data, &(skb->data[chk_idx+4]), 618 hif_dev->rx_transfer_len); 619 620 /* Record the buffer pointer */ 621 hif_dev->remain_skb = nskb; 622 spin_unlock(&hif_dev->rx_lock); 623 } else { 624 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) { 625 dev_err(&hif_dev->udev->dev, 626 "ath9k_htc: over RX MAX_PKT_NUM\n"); 627 goto err; 628 } 629 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 630 if (!nskb) { 631 dev_err(&hif_dev->udev->dev, 632 "ath9k_htc: RX memory allocation error\n"); 633 goto err; 634 } 635 skb_reserve(nskb, 32); 636 RX_STAT_INC(skb_allocated); 637 638 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 639 skb_put(nskb, pkt_len); 640 skb_pool[pool_index++] = nskb; 641 } 642 } 643 644 err: 645 for (i = 0; i < pool_index; i++) { 646 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 647 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 648 skb_pool[i]->len, USB_WLAN_RX_PIPE); 649 RX_STAT_INC(skb_completed); 650 } 651 } 652 653 static void ath9k_hif_usb_rx_cb(struct urb *urb) 654 { 655 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 656 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 657 struct sk_buff *skb = rx_buf->skb; 658 int ret; 659 660 if (!skb) 661 return; 662 663 if (!hif_dev) 664 goto free; 665 666 switch (urb->status) { 667 case 0: 668 break; 669 case -ENOENT: 670 case -ECONNRESET: 671 case -ENODEV: 672 case -ESHUTDOWN: 673 goto free; 674 default: 675 goto resubmit; 676 } 677 678 if (likely(urb->actual_length != 0)) { 679 skb_put(skb, urb->actual_length); 680 ath9k_hif_usb_rx_stream(hif_dev, skb); 681 } 682 683 resubmit: 684 skb_reset_tail_pointer(skb); 685 skb_trim(skb, 0); 686 687 usb_anchor_urb(urb, &hif_dev->rx_submitted); 688 ret = usb_submit_urb(urb, GFP_ATOMIC); 689 if (ret) { 690 usb_unanchor_urb(urb); 691 goto free; 692 } 693 694 return; 695 free: 696 kfree_skb(skb); 697 kfree(rx_buf); 698 } 699 700 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 701 { 702 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 703 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 704 struct sk_buff *skb = rx_buf->skb; 705 struct sk_buff *nskb; 706 int ret; 707 708 if (!skb) 709 return; 710 711 if (!hif_dev) 712 goto free; 713 714 switch (urb->status) { 715 case 0: 716 break; 717 case -ENOENT: 718 case -ECONNRESET: 719 case -ENODEV: 720 case -ESHUTDOWN: 721 goto free; 722 default: 723 skb_reset_tail_pointer(skb); 724 skb_trim(skb, 0); 725 726 goto resubmit; 727 } 728 729 if (likely(urb->actual_length != 0)) { 730 skb_put(skb, urb->actual_length); 731 732 /* Process the command first */ 733 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 734 skb->len, USB_REG_IN_PIPE); 735 736 737 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 738 if (!nskb) { 739 dev_err(&hif_dev->udev->dev, 740 "ath9k_htc: REG_IN memory allocation failure\n"); 741 urb->context = NULL; 742 return; 743 } 744 745 rx_buf->skb = nskb; 746 747 usb_fill_int_urb(urb, hif_dev->udev, 748 usb_rcvintpipe(hif_dev->udev, 749 USB_REG_IN_PIPE), 750 nskb->data, MAX_REG_IN_BUF_SIZE, 751 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 752 } 753 754 resubmit: 755 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 756 ret = usb_submit_urb(urb, GFP_ATOMIC); 757 if (ret) { 758 usb_unanchor_urb(urb); 759 goto free; 760 } 761 762 return; 763 free: 764 kfree_skb(skb); 765 kfree(rx_buf); 766 urb->context = NULL; 767 } 768 769 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 770 { 771 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 772 unsigned long flags; 773 774 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 775 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 776 &hif_dev->tx.tx_buf, list) { 777 usb_get_urb(tx_buf->urb); 778 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 779 usb_kill_urb(tx_buf->urb); 780 list_del(&tx_buf->list); 781 usb_free_urb(tx_buf->urb); 782 kfree(tx_buf->buf); 783 kfree(tx_buf); 784 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 785 } 786 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 787 788 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 789 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 790 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 791 792 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 793 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 794 &hif_dev->tx.tx_pending, list) { 795 usb_get_urb(tx_buf->urb); 796 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 797 usb_kill_urb(tx_buf->urb); 798 list_del(&tx_buf->list); 799 usb_free_urb(tx_buf->urb); 800 kfree(tx_buf->buf); 801 kfree(tx_buf); 802 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 803 } 804 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 805 806 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 807 } 808 809 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 810 { 811 struct tx_buf *tx_buf; 812 int i; 813 814 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 815 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 816 spin_lock_init(&hif_dev->tx.tx_lock); 817 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 818 init_usb_anchor(&hif_dev->mgmt_submitted); 819 820 for (i = 0; i < MAX_TX_URB_NUM; i++) { 821 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL); 822 if (!tx_buf) 823 goto err; 824 825 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 826 if (!tx_buf->buf) 827 goto err; 828 829 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 830 if (!tx_buf->urb) 831 goto err; 832 833 tx_buf->hif_dev = hif_dev; 834 __skb_queue_head_init(&tx_buf->skb_queue); 835 836 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 837 } 838 839 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 840 841 return 0; 842 err: 843 if (tx_buf) { 844 kfree(tx_buf->buf); 845 kfree(tx_buf); 846 } 847 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 848 return -ENOMEM; 849 } 850 851 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 852 { 853 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 854 } 855 856 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 857 { 858 struct rx_buf *rx_buf = NULL; 859 struct sk_buff *skb = NULL; 860 struct urb *urb = NULL; 861 int i, ret; 862 863 init_usb_anchor(&hif_dev->rx_submitted); 864 spin_lock_init(&hif_dev->rx_lock); 865 866 for (i = 0; i < MAX_RX_URB_NUM; i++) { 867 868 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 869 if (!rx_buf) { 870 ret = -ENOMEM; 871 goto err_rxb; 872 } 873 874 /* Allocate URB */ 875 urb = usb_alloc_urb(0, GFP_KERNEL); 876 if (urb == NULL) { 877 ret = -ENOMEM; 878 goto err_urb; 879 } 880 881 /* Allocate buffer */ 882 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 883 if (!skb) { 884 ret = -ENOMEM; 885 goto err_skb; 886 } 887 888 rx_buf->hif_dev = hif_dev; 889 rx_buf->skb = skb; 890 891 usb_fill_bulk_urb(urb, hif_dev->udev, 892 usb_rcvbulkpipe(hif_dev->udev, 893 USB_WLAN_RX_PIPE), 894 skb->data, MAX_RX_BUF_SIZE, 895 ath9k_hif_usb_rx_cb, rx_buf); 896 897 /* Anchor URB */ 898 usb_anchor_urb(urb, &hif_dev->rx_submitted); 899 900 /* Submit URB */ 901 ret = usb_submit_urb(urb, GFP_KERNEL); 902 if (ret) { 903 usb_unanchor_urb(urb); 904 goto err_submit; 905 } 906 907 /* 908 * Drop reference count. 909 * This ensures that the URB is freed when killing them. 910 */ 911 usb_free_urb(urb); 912 } 913 914 return 0; 915 916 err_submit: 917 kfree_skb(skb); 918 err_skb: 919 usb_free_urb(urb); 920 err_urb: 921 kfree(rx_buf); 922 err_rxb: 923 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 924 return ret; 925 } 926 927 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 928 { 929 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 930 } 931 932 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 933 { 934 struct rx_buf *rx_buf = NULL; 935 struct sk_buff *skb = NULL; 936 struct urb *urb = NULL; 937 int i, ret; 938 939 init_usb_anchor(&hif_dev->reg_in_submitted); 940 941 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 942 943 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 944 if (!rx_buf) { 945 ret = -ENOMEM; 946 goto err_rxb; 947 } 948 949 /* Allocate URB */ 950 urb = usb_alloc_urb(0, GFP_KERNEL); 951 if (urb == NULL) { 952 ret = -ENOMEM; 953 goto err_urb; 954 } 955 956 /* Allocate buffer */ 957 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 958 if (!skb) { 959 ret = -ENOMEM; 960 goto err_skb; 961 } 962 963 rx_buf->hif_dev = hif_dev; 964 rx_buf->skb = skb; 965 966 usb_fill_int_urb(urb, hif_dev->udev, 967 usb_rcvintpipe(hif_dev->udev, 968 USB_REG_IN_PIPE), 969 skb->data, MAX_REG_IN_BUF_SIZE, 970 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 971 972 /* Anchor URB */ 973 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 974 975 /* Submit URB */ 976 ret = usb_submit_urb(urb, GFP_KERNEL); 977 if (ret) { 978 usb_unanchor_urb(urb); 979 goto err_submit; 980 } 981 982 /* 983 * Drop reference count. 984 * This ensures that the URB is freed when killing them. 985 */ 986 usb_free_urb(urb); 987 } 988 989 return 0; 990 991 err_submit: 992 kfree_skb(skb); 993 err_skb: 994 usb_free_urb(urb); 995 err_urb: 996 kfree(rx_buf); 997 err_rxb: 998 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 999 return ret; 1000 } 1001 1002 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 1003 { 1004 /* Register Write */ 1005 init_usb_anchor(&hif_dev->regout_submitted); 1006 1007 /* TX */ 1008 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 1009 goto err; 1010 1011 /* RX */ 1012 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 1013 goto err_rx; 1014 1015 /* Register Read */ 1016 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 1017 goto err_reg; 1018 1019 return 0; 1020 err_reg: 1021 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1022 err_rx: 1023 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1024 err: 1025 return -ENOMEM; 1026 } 1027 1028 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 1029 { 1030 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 1031 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1032 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1033 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1034 } 1035 1036 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 1037 { 1038 int transfer, err; 1039 const void *data = hif_dev->fw_data; 1040 size_t len = hif_dev->fw_size; 1041 u32 addr = AR9271_FIRMWARE; 1042 u8 *buf = kzalloc(4096, GFP_KERNEL); 1043 u32 firm_offset; 1044 1045 if (!buf) 1046 return -ENOMEM; 1047 1048 while (len) { 1049 transfer = min_t(size_t, len, 4096); 1050 memcpy(buf, data, transfer); 1051 1052 err = usb_control_msg(hif_dev->udev, 1053 usb_sndctrlpipe(hif_dev->udev, 0), 1054 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1055 addr >> 8, 0, buf, transfer, 1056 USB_MSG_TIMEOUT); 1057 if (err < 0) { 1058 kfree(buf); 1059 return err; 1060 } 1061 1062 len -= transfer; 1063 data += transfer; 1064 addr += transfer; 1065 } 1066 kfree(buf); 1067 1068 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1069 firm_offset = AR7010_FIRMWARE_TEXT; 1070 else 1071 firm_offset = AR9271_FIRMWARE_TEXT; 1072 1073 /* 1074 * Issue FW download complete command to firmware. 1075 */ 1076 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1077 FIRMWARE_DOWNLOAD_COMP, 1078 0x40 | USB_DIR_OUT, 1079 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1080 if (err) 1081 return -EIO; 1082 1083 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1084 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1085 1086 return 0; 1087 } 1088 1089 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1090 { 1091 int ret; 1092 1093 ret = ath9k_hif_usb_download_fw(hif_dev); 1094 if (ret) { 1095 dev_err(&hif_dev->udev->dev, 1096 "ath9k_htc: Firmware - %s download failed\n", 1097 hif_dev->fw_name); 1098 return ret; 1099 } 1100 1101 /* Alloc URBs */ 1102 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1103 if (ret) { 1104 dev_err(&hif_dev->udev->dev, 1105 "ath9k_htc: Unable to allocate URBs\n"); 1106 return ret; 1107 } 1108 1109 return 0; 1110 } 1111 1112 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1113 { 1114 ath9k_hif_usb_dealloc_urbs(hif_dev); 1115 } 1116 1117 /* 1118 * If initialization fails or the FW cannot be retrieved, 1119 * detach the device. 1120 */ 1121 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1122 { 1123 struct device *dev = &hif_dev->udev->dev; 1124 struct device *parent = dev->parent; 1125 1126 complete_all(&hif_dev->fw_done); 1127 1128 if (parent) 1129 device_lock(parent); 1130 1131 device_release_driver(dev); 1132 1133 if (parent) 1134 device_unlock(parent); 1135 } 1136 1137 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1138 1139 /* taken from iwlwifi */ 1140 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1141 bool first) 1142 { 1143 char index[8], *chip; 1144 int ret; 1145 1146 if (first) { 1147 if (htc_use_dev_fw) { 1148 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1149 sprintf(index, "%s", "dev"); 1150 } else { 1151 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1152 sprintf(index, "%d", hif_dev->fw_minor_index); 1153 } 1154 } else { 1155 hif_dev->fw_minor_index--; 1156 sprintf(index, "%d", hif_dev->fw_minor_index); 1157 } 1158 1159 /* test for FW 1.3 */ 1160 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1161 const char *filename; 1162 1163 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1164 filename = FIRMWARE_AR7010_1_1; 1165 else 1166 filename = FIRMWARE_AR9271; 1167 1168 /* expected fw locations: 1169 * - htc_9271.fw (stable version 1.3, depricated) 1170 */ 1171 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1172 "%s", filename); 1173 1174 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1175 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1176 1177 return -ENOENT; 1178 } else { 1179 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1180 chip = "7010"; 1181 else 1182 chip = "9271"; 1183 1184 /* expected fw locations: 1185 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1186 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1187 */ 1188 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1189 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1190 chip, MAJOR_VERSION_REQ, index); 1191 } 1192 1193 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1194 &hif_dev->udev->dev, GFP_KERNEL, 1195 hif_dev, ath9k_hif_usb_firmware_cb); 1196 if (ret) { 1197 dev_err(&hif_dev->udev->dev, 1198 "ath9k_htc: Async request for firmware %s failed\n", 1199 hif_dev->fw_name); 1200 return ret; 1201 } 1202 1203 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1204 hif_dev->fw_name); 1205 1206 return ret; 1207 } 1208 1209 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1210 { 1211 struct hif_device_usb *hif_dev = context; 1212 int ret; 1213 1214 if (!fw) { 1215 ret = ath9k_hif_request_firmware(hif_dev, false); 1216 if (!ret) 1217 return; 1218 1219 dev_err(&hif_dev->udev->dev, 1220 "ath9k_htc: Failed to get firmware %s\n", 1221 hif_dev->fw_name); 1222 goto err_fw; 1223 } 1224 1225 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1226 &hif_dev->udev->dev); 1227 if (hif_dev->htc_handle == NULL) 1228 goto err_dev_alloc; 1229 1230 hif_dev->fw_data = fw->data; 1231 hif_dev->fw_size = fw->size; 1232 1233 /* Proceed with initialization */ 1234 1235 ret = ath9k_hif_usb_dev_init(hif_dev); 1236 if (ret) 1237 goto err_dev_init; 1238 1239 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1240 &hif_dev->interface->dev, 1241 hif_dev->usb_device_id->idProduct, 1242 hif_dev->udev->product, 1243 hif_dev->usb_device_id->driver_info); 1244 if (ret) { 1245 ret = -EINVAL; 1246 goto err_htc_hw_init; 1247 } 1248 1249 release_firmware(fw); 1250 hif_dev->flags |= HIF_USB_READY; 1251 complete_all(&hif_dev->fw_done); 1252 1253 return; 1254 1255 err_htc_hw_init: 1256 ath9k_hif_usb_dev_deinit(hif_dev); 1257 err_dev_init: 1258 ath9k_htc_hw_free(hif_dev->htc_handle); 1259 err_dev_alloc: 1260 release_firmware(fw); 1261 err_fw: 1262 ath9k_hif_usb_firmware_fail(hif_dev); 1263 } 1264 1265 /* 1266 * An exact copy of the function from zd1211rw. 1267 */ 1268 static int send_eject_command(struct usb_interface *interface) 1269 { 1270 struct usb_device *udev = interface_to_usbdev(interface); 1271 struct usb_host_interface *iface_desc = interface->cur_altsetting; 1272 struct usb_endpoint_descriptor *endpoint; 1273 unsigned char *cmd; 1274 u8 bulk_out_ep; 1275 int r; 1276 1277 if (iface_desc->desc.bNumEndpoints < 2) 1278 return -ENODEV; 1279 1280 /* Find bulk out endpoint */ 1281 for (r = 1; r >= 0; r--) { 1282 endpoint = &iface_desc->endpoint[r].desc; 1283 if (usb_endpoint_dir_out(endpoint) && 1284 usb_endpoint_xfer_bulk(endpoint)) { 1285 bulk_out_ep = endpoint->bEndpointAddress; 1286 break; 1287 } 1288 } 1289 if (r == -1) { 1290 dev_err(&udev->dev, 1291 "ath9k_htc: Could not find bulk out endpoint\n"); 1292 return -ENODEV; 1293 } 1294 1295 cmd = kzalloc(31, GFP_KERNEL); 1296 if (cmd == NULL) 1297 return -ENODEV; 1298 1299 /* USB bulk command block */ 1300 cmd[0] = 0x55; /* bulk command signature */ 1301 cmd[1] = 0x53; /* bulk command signature */ 1302 cmd[2] = 0x42; /* bulk command signature */ 1303 cmd[3] = 0x43; /* bulk command signature */ 1304 cmd[14] = 6; /* command length */ 1305 1306 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1307 cmd[19] = 0x2; /* eject disc */ 1308 1309 dev_info(&udev->dev, "Ejecting storage device...\n"); 1310 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1311 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1312 kfree(cmd); 1313 if (r) 1314 return r; 1315 1316 /* At this point, the device disconnects and reconnects with the real 1317 * ID numbers. */ 1318 1319 usb_set_intfdata(interface, NULL); 1320 return 0; 1321 } 1322 1323 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1324 const struct usb_device_id *id) 1325 { 1326 struct usb_device *udev = interface_to_usbdev(interface); 1327 struct hif_device_usb *hif_dev; 1328 int ret = 0; 1329 1330 if (id->driver_info == STORAGE_DEVICE) 1331 return send_eject_command(interface); 1332 1333 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1334 if (!hif_dev) { 1335 ret = -ENOMEM; 1336 goto err_alloc; 1337 } 1338 1339 usb_get_dev(udev); 1340 1341 hif_dev->udev = udev; 1342 hif_dev->interface = interface; 1343 hif_dev->usb_device_id = id; 1344 #ifdef CONFIG_PM 1345 udev->reset_resume = 1; 1346 #endif 1347 usb_set_intfdata(interface, hif_dev); 1348 1349 init_completion(&hif_dev->fw_done); 1350 1351 ret = ath9k_hif_request_firmware(hif_dev, true); 1352 if (ret) 1353 goto err_fw_req; 1354 1355 return ret; 1356 1357 err_fw_req: 1358 usb_set_intfdata(interface, NULL); 1359 kfree(hif_dev); 1360 usb_put_dev(udev); 1361 err_alloc: 1362 return ret; 1363 } 1364 1365 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1366 { 1367 u32 reboot_cmd = 0xffffffff; 1368 void *buf; 1369 int ret; 1370 1371 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1372 if (!buf) 1373 return; 1374 1375 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1376 buf, 4, NULL, USB_MSG_TIMEOUT); 1377 if (ret) 1378 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1379 1380 kfree(buf); 1381 } 1382 1383 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1384 { 1385 struct usb_device *udev = interface_to_usbdev(interface); 1386 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1387 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1388 1389 if (!hif_dev) 1390 return; 1391 1392 wait_for_completion(&hif_dev->fw_done); 1393 1394 if (hif_dev->flags & HIF_USB_READY) { 1395 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1396 ath9k_hif_usb_dev_deinit(hif_dev); 1397 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); 1398 ath9k_htc_hw_free(hif_dev->htc_handle); 1399 } 1400 1401 usb_set_intfdata(interface, NULL); 1402 1403 /* If firmware was loaded we should drop it 1404 * go back to first stage bootloader. */ 1405 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1406 ath9k_hif_usb_reboot(udev); 1407 1408 kfree(hif_dev); 1409 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1410 usb_put_dev(udev); 1411 } 1412 1413 #ifdef CONFIG_PM 1414 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1415 pm_message_t message) 1416 { 1417 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1418 1419 /* 1420 * The device has to be set to FULLSLEEP mode in case no 1421 * interface is up. 1422 */ 1423 if (!(hif_dev->flags & HIF_USB_START)) 1424 ath9k_htc_suspend(hif_dev->htc_handle); 1425 1426 wait_for_completion(&hif_dev->fw_done); 1427 1428 if (hif_dev->flags & HIF_USB_READY) 1429 ath9k_hif_usb_dealloc_urbs(hif_dev); 1430 1431 return 0; 1432 } 1433 1434 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1435 { 1436 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1437 struct htc_target *htc_handle = hif_dev->htc_handle; 1438 int ret; 1439 const struct firmware *fw; 1440 1441 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1442 if (ret) 1443 return ret; 1444 1445 if (hif_dev->flags & HIF_USB_READY) { 1446 /* request cached firmware during suspend/resume cycle */ 1447 ret = request_firmware(&fw, hif_dev->fw_name, 1448 &hif_dev->udev->dev); 1449 if (ret) 1450 goto fail_resume; 1451 1452 hif_dev->fw_data = fw->data; 1453 hif_dev->fw_size = fw->size; 1454 ret = ath9k_hif_usb_download_fw(hif_dev); 1455 release_firmware(fw); 1456 if (ret) 1457 goto fail_resume; 1458 } else { 1459 ath9k_hif_usb_dealloc_urbs(hif_dev); 1460 return -EIO; 1461 } 1462 1463 mdelay(100); 1464 1465 ret = ath9k_htc_resume(htc_handle); 1466 1467 if (ret) 1468 goto fail_resume; 1469 1470 return 0; 1471 1472 fail_resume: 1473 ath9k_hif_usb_dealloc_urbs(hif_dev); 1474 1475 return ret; 1476 } 1477 #endif 1478 1479 static struct usb_driver ath9k_hif_usb_driver = { 1480 .name = KBUILD_MODNAME, 1481 .probe = ath9k_hif_usb_probe, 1482 .disconnect = ath9k_hif_usb_disconnect, 1483 #ifdef CONFIG_PM 1484 .suspend = ath9k_hif_usb_suspend, 1485 .resume = ath9k_hif_usb_resume, 1486 .reset_resume = ath9k_hif_usb_resume, 1487 #endif 1488 .id_table = ath9k_hif_usb_ids, 1489 .soft_unbind = 1, 1490 .disable_hub_initiated_lpm = 1, 1491 }; 1492 1493 int ath9k_hif_usb_init(void) 1494 { 1495 return usb_register(&ath9k_hif_usb_driver); 1496 } 1497 1498 void ath9k_hif_usb_exit(void) 1499 { 1500 usb_deregister(&ath9k_hif_usb_driver); 1501 } 1502