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 } else { 372 TX_STAT_INC(buf_queued); 373 } 374 375 return ret; 376 } 377 378 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 379 { 380 struct ath9k_htc_tx_ctl *tx_ctl; 381 unsigned long flags; 382 int ret = 0; 383 384 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 385 386 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 387 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 388 return -ENODEV; 389 } 390 391 /* Check if the max queue count has been reached */ 392 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 393 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 394 return -ENOMEM; 395 } 396 397 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 398 399 tx_ctl = HTC_SKB_CB(skb); 400 401 /* Mgmt/Beacon frames don't use the TX buffer pool */ 402 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 403 (tx_ctl->type == ATH9K_HTC_BEACON)) { 404 ret = hif_usb_send_mgmt(hif_dev, skb); 405 } 406 407 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 408 409 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 410 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 411 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 412 hif_dev->tx.tx_skb_cnt++; 413 } 414 415 /* Check if AMPDUs have to be sent immediately */ 416 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 417 (hif_dev->tx.tx_skb_cnt < 2)) { 418 __hif_usb_tx(hif_dev); 419 } 420 421 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 422 423 return ret; 424 } 425 426 static void hif_usb_start(void *hif_handle) 427 { 428 struct hif_device_usb *hif_dev = hif_handle; 429 unsigned long flags; 430 431 hif_dev->flags |= HIF_USB_START; 432 433 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 434 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 435 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 436 } 437 438 static void hif_usb_stop(void *hif_handle) 439 { 440 struct hif_device_usb *hif_dev = hif_handle; 441 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 442 unsigned long flags; 443 444 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 445 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 446 hif_dev->tx.tx_skb_cnt = 0; 447 hif_dev->tx.flags |= HIF_USB_TX_STOP; 448 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 449 450 /* The pending URBs have to be canceled. */ 451 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 452 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 453 &hif_dev->tx.tx_pending, list) { 454 usb_get_urb(tx_buf->urb); 455 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 456 usb_kill_urb(tx_buf->urb); 457 list_del(&tx_buf->list); 458 usb_free_urb(tx_buf->urb); 459 kfree(tx_buf->buf); 460 kfree(tx_buf); 461 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 462 } 463 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 464 465 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 466 } 467 468 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 469 { 470 struct hif_device_usb *hif_dev = hif_handle; 471 int ret = 0; 472 473 switch (pipe_id) { 474 case USB_WLAN_TX_PIPE: 475 ret = hif_usb_send_tx(hif_dev, skb); 476 break; 477 case USB_REG_OUT_PIPE: 478 ret = hif_usb_send_regout(hif_dev, skb); 479 break; 480 default: 481 dev_err(&hif_dev->udev->dev, 482 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 483 ret = -EINVAL; 484 break; 485 } 486 487 return ret; 488 } 489 490 static inline bool check_index(struct sk_buff *skb, u8 idx) 491 { 492 struct ath9k_htc_tx_ctl *tx_ctl; 493 494 tx_ctl = HTC_SKB_CB(skb); 495 496 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 497 (tx_ctl->sta_idx == idx)) 498 return true; 499 500 return false; 501 } 502 503 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 504 { 505 struct hif_device_usb *hif_dev = hif_handle; 506 struct sk_buff *skb, *tmp; 507 unsigned long flags; 508 509 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 510 511 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 512 if (check_index(skb, idx)) { 513 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 514 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 515 skb, false); 516 hif_dev->tx.tx_skb_cnt--; 517 TX_STAT_INC(skb_failed); 518 } 519 } 520 521 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 522 } 523 524 static struct ath9k_htc_hif hif_usb = { 525 .transport = ATH9K_HIF_USB, 526 .name = "ath9k_hif_usb", 527 528 .control_ul_pipe = USB_REG_OUT_PIPE, 529 .control_dl_pipe = USB_REG_IN_PIPE, 530 531 .start = hif_usb_start, 532 .stop = hif_usb_stop, 533 .sta_drain = hif_usb_sta_drain, 534 .send = hif_usb_send, 535 }; 536 537 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 538 struct sk_buff *skb) 539 { 540 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 541 int index = 0, i, len = skb->len; 542 int rx_remain_len, rx_pkt_len; 543 u16 pool_index = 0; 544 u8 *ptr; 545 546 spin_lock(&hif_dev->rx_lock); 547 548 rx_remain_len = hif_dev->rx_remain_len; 549 rx_pkt_len = hif_dev->rx_transfer_len; 550 551 if (rx_remain_len != 0) { 552 struct sk_buff *remain_skb = hif_dev->remain_skb; 553 554 if (remain_skb) { 555 ptr = (u8 *) remain_skb->data; 556 557 index = rx_remain_len; 558 rx_remain_len -= hif_dev->rx_pad_len; 559 ptr += rx_pkt_len; 560 561 memcpy(ptr, skb->data, rx_remain_len); 562 563 rx_pkt_len += rx_remain_len; 564 hif_dev->rx_remain_len = 0; 565 skb_put(remain_skb, rx_pkt_len); 566 567 skb_pool[pool_index++] = remain_skb; 568 569 } else { 570 index = rx_remain_len; 571 } 572 } 573 574 spin_unlock(&hif_dev->rx_lock); 575 576 while (index < len) { 577 u16 pkt_len; 578 u16 pkt_tag; 579 u16 pad_len; 580 int chk_idx; 581 582 ptr = (u8 *) skb->data; 583 584 pkt_len = get_unaligned_le16(ptr + index); 585 pkt_tag = get_unaligned_le16(ptr + index + 2); 586 587 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 588 RX_STAT_INC(skb_dropped); 589 return; 590 } 591 592 if (pkt_len > 2 * MAX_RX_BUF_SIZE) { 593 dev_err(&hif_dev->udev->dev, 594 "ath9k_htc: invalid pkt_len (%x)\n", pkt_len); 595 RX_STAT_INC(skb_dropped); 596 return; 597 } 598 599 pad_len = 4 - (pkt_len & 0x3); 600 if (pad_len == 4) 601 pad_len = 0; 602 603 chk_idx = index; 604 index = index + 4 + pkt_len + pad_len; 605 606 if (index > MAX_RX_BUF_SIZE) { 607 spin_lock(&hif_dev->rx_lock); 608 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 609 hif_dev->rx_transfer_len = 610 MAX_RX_BUF_SIZE - chk_idx - 4; 611 hif_dev->rx_pad_len = pad_len; 612 613 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 614 if (!nskb) { 615 dev_err(&hif_dev->udev->dev, 616 "ath9k_htc: RX memory allocation error\n"); 617 spin_unlock(&hif_dev->rx_lock); 618 goto err; 619 } 620 skb_reserve(nskb, 32); 621 RX_STAT_INC(skb_allocated); 622 623 memcpy(nskb->data, &(skb->data[chk_idx+4]), 624 hif_dev->rx_transfer_len); 625 626 /* Record the buffer pointer */ 627 hif_dev->remain_skb = nskb; 628 spin_unlock(&hif_dev->rx_lock); 629 } else { 630 if (pool_index == MAX_PKT_NUM_IN_TRANSFER) { 631 dev_err(&hif_dev->udev->dev, 632 "ath9k_htc: over RX MAX_PKT_NUM\n"); 633 goto err; 634 } 635 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 636 if (!nskb) { 637 dev_err(&hif_dev->udev->dev, 638 "ath9k_htc: RX memory allocation error\n"); 639 goto err; 640 } 641 skb_reserve(nskb, 32); 642 RX_STAT_INC(skb_allocated); 643 644 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 645 skb_put(nskb, pkt_len); 646 skb_pool[pool_index++] = nskb; 647 } 648 } 649 650 err: 651 for (i = 0; i < pool_index; i++) { 652 RX_STAT_ADD(skb_completed_bytes, skb_pool[i]->len); 653 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 654 skb_pool[i]->len, USB_WLAN_RX_PIPE); 655 RX_STAT_INC(skb_completed); 656 } 657 } 658 659 static void ath9k_hif_usb_rx_cb(struct urb *urb) 660 { 661 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 662 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 663 struct sk_buff *skb = rx_buf->skb; 664 int ret; 665 666 if (!skb) 667 return; 668 669 if (!hif_dev) 670 goto free; 671 672 switch (urb->status) { 673 case 0: 674 break; 675 case -ENOENT: 676 case -ECONNRESET: 677 case -ENODEV: 678 case -ESHUTDOWN: 679 goto free; 680 default: 681 goto resubmit; 682 } 683 684 if (likely(urb->actual_length != 0)) { 685 skb_put(skb, urb->actual_length); 686 ath9k_hif_usb_rx_stream(hif_dev, skb); 687 } 688 689 resubmit: 690 skb_reset_tail_pointer(skb); 691 skb_trim(skb, 0); 692 693 usb_anchor_urb(urb, &hif_dev->rx_submitted); 694 ret = usb_submit_urb(urb, GFP_ATOMIC); 695 if (ret) { 696 usb_unanchor_urb(urb); 697 goto free; 698 } 699 700 return; 701 free: 702 kfree_skb(skb); 703 kfree(rx_buf); 704 } 705 706 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 707 { 708 struct rx_buf *rx_buf = (struct rx_buf *)urb->context; 709 struct hif_device_usb *hif_dev = rx_buf->hif_dev; 710 struct sk_buff *skb = rx_buf->skb; 711 struct sk_buff *nskb; 712 int ret; 713 714 if (!skb) 715 return; 716 717 if (!hif_dev) 718 goto free; 719 720 switch (urb->status) { 721 case 0: 722 break; 723 case -ENOENT: 724 case -ECONNRESET: 725 case -ENODEV: 726 case -ESHUTDOWN: 727 goto free; 728 default: 729 skb_reset_tail_pointer(skb); 730 skb_trim(skb, 0); 731 732 goto resubmit; 733 } 734 735 if (likely(urb->actual_length != 0)) { 736 skb_put(skb, urb->actual_length); 737 738 /* Process the command first */ 739 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 740 skb->len, USB_REG_IN_PIPE); 741 742 743 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 744 if (!nskb) { 745 dev_err(&hif_dev->udev->dev, 746 "ath9k_htc: REG_IN memory allocation failure\n"); 747 urb->context = NULL; 748 return; 749 } 750 751 rx_buf->skb = nskb; 752 753 usb_fill_int_urb(urb, hif_dev->udev, 754 usb_rcvintpipe(hif_dev->udev, 755 USB_REG_IN_PIPE), 756 nskb->data, MAX_REG_IN_BUF_SIZE, 757 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 758 } 759 760 resubmit: 761 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 762 ret = usb_submit_urb(urb, GFP_ATOMIC); 763 if (ret) { 764 usb_unanchor_urb(urb); 765 goto free; 766 } 767 768 return; 769 free: 770 kfree_skb(skb); 771 kfree(rx_buf); 772 urb->context = NULL; 773 } 774 775 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 776 { 777 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 778 unsigned long flags; 779 780 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 781 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 782 &hif_dev->tx.tx_buf, list) { 783 usb_get_urb(tx_buf->urb); 784 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 785 usb_kill_urb(tx_buf->urb); 786 list_del(&tx_buf->list); 787 usb_free_urb(tx_buf->urb); 788 kfree(tx_buf->buf); 789 kfree(tx_buf); 790 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 791 } 792 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 793 794 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 795 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 796 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 797 798 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 799 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 800 &hif_dev->tx.tx_pending, list) { 801 usb_get_urb(tx_buf->urb); 802 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 803 usb_kill_urb(tx_buf->urb); 804 list_del(&tx_buf->list); 805 usb_free_urb(tx_buf->urb); 806 kfree(tx_buf->buf); 807 kfree(tx_buf); 808 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 809 } 810 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 811 812 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 813 } 814 815 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 816 { 817 struct tx_buf *tx_buf; 818 int i; 819 820 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 821 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 822 spin_lock_init(&hif_dev->tx.tx_lock); 823 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 824 init_usb_anchor(&hif_dev->mgmt_submitted); 825 826 for (i = 0; i < MAX_TX_URB_NUM; i++) { 827 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL); 828 if (!tx_buf) 829 goto err; 830 831 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 832 if (!tx_buf->buf) 833 goto err; 834 835 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 836 if (!tx_buf->urb) 837 goto err; 838 839 tx_buf->hif_dev = hif_dev; 840 __skb_queue_head_init(&tx_buf->skb_queue); 841 842 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 843 } 844 845 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 846 847 return 0; 848 err: 849 if (tx_buf) { 850 kfree(tx_buf->buf); 851 kfree(tx_buf); 852 } 853 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 854 return -ENOMEM; 855 } 856 857 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 858 { 859 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 860 } 861 862 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 863 { 864 struct rx_buf *rx_buf = NULL; 865 struct sk_buff *skb = NULL; 866 struct urb *urb = NULL; 867 int i, ret; 868 869 init_usb_anchor(&hif_dev->rx_submitted); 870 spin_lock_init(&hif_dev->rx_lock); 871 872 for (i = 0; i < MAX_RX_URB_NUM; i++) { 873 874 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 875 if (!rx_buf) { 876 ret = -ENOMEM; 877 goto err_rxb; 878 } 879 880 /* Allocate URB */ 881 urb = usb_alloc_urb(0, GFP_KERNEL); 882 if (urb == NULL) { 883 ret = -ENOMEM; 884 goto err_urb; 885 } 886 887 /* Allocate buffer */ 888 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 889 if (!skb) { 890 ret = -ENOMEM; 891 goto err_skb; 892 } 893 894 rx_buf->hif_dev = hif_dev; 895 rx_buf->skb = skb; 896 897 usb_fill_bulk_urb(urb, hif_dev->udev, 898 usb_rcvbulkpipe(hif_dev->udev, 899 USB_WLAN_RX_PIPE), 900 skb->data, MAX_RX_BUF_SIZE, 901 ath9k_hif_usb_rx_cb, rx_buf); 902 903 /* Anchor URB */ 904 usb_anchor_urb(urb, &hif_dev->rx_submitted); 905 906 /* Submit URB */ 907 ret = usb_submit_urb(urb, GFP_KERNEL); 908 if (ret) { 909 usb_unanchor_urb(urb); 910 goto err_submit; 911 } 912 913 /* 914 * Drop reference count. 915 * This ensures that the URB is freed when killing them. 916 */ 917 usb_free_urb(urb); 918 } 919 920 return 0; 921 922 err_submit: 923 kfree_skb(skb); 924 err_skb: 925 usb_free_urb(urb); 926 err_urb: 927 kfree(rx_buf); 928 err_rxb: 929 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 930 return ret; 931 } 932 933 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 934 { 935 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 936 } 937 938 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 939 { 940 struct rx_buf *rx_buf = NULL; 941 struct sk_buff *skb = NULL; 942 struct urb *urb = NULL; 943 int i, ret; 944 945 init_usb_anchor(&hif_dev->reg_in_submitted); 946 947 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 948 949 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 950 if (!rx_buf) { 951 ret = -ENOMEM; 952 goto err_rxb; 953 } 954 955 /* Allocate URB */ 956 urb = usb_alloc_urb(0, GFP_KERNEL); 957 if (urb == NULL) { 958 ret = -ENOMEM; 959 goto err_urb; 960 } 961 962 /* Allocate buffer */ 963 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 964 if (!skb) { 965 ret = -ENOMEM; 966 goto err_skb; 967 } 968 969 rx_buf->hif_dev = hif_dev; 970 rx_buf->skb = skb; 971 972 usb_fill_int_urb(urb, hif_dev->udev, 973 usb_rcvintpipe(hif_dev->udev, 974 USB_REG_IN_PIPE), 975 skb->data, MAX_REG_IN_BUF_SIZE, 976 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 977 978 /* Anchor URB */ 979 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 980 981 /* Submit URB */ 982 ret = usb_submit_urb(urb, GFP_KERNEL); 983 if (ret) { 984 usb_unanchor_urb(urb); 985 goto err_submit; 986 } 987 988 /* 989 * Drop reference count. 990 * This ensures that the URB is freed when killing them. 991 */ 992 usb_free_urb(urb); 993 } 994 995 return 0; 996 997 err_submit: 998 kfree_skb(skb); 999 err_skb: 1000 usb_free_urb(urb); 1001 err_urb: 1002 kfree(rx_buf); 1003 err_rxb: 1004 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1005 return ret; 1006 } 1007 1008 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 1009 { 1010 /* Register Write */ 1011 init_usb_anchor(&hif_dev->regout_submitted); 1012 1013 /* TX */ 1014 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 1015 goto err; 1016 1017 /* RX */ 1018 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 1019 goto err_rx; 1020 1021 /* Register Read */ 1022 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 1023 goto err_reg; 1024 1025 return 0; 1026 err_reg: 1027 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1028 err_rx: 1029 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1030 err: 1031 return -ENOMEM; 1032 } 1033 1034 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 1035 { 1036 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 1037 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1038 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1039 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1040 } 1041 1042 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 1043 { 1044 int transfer, err; 1045 const void *data = hif_dev->fw_data; 1046 size_t len = hif_dev->fw_size; 1047 u32 addr = AR9271_FIRMWARE; 1048 u8 *buf = kzalloc(4096, GFP_KERNEL); 1049 u32 firm_offset; 1050 1051 if (!buf) 1052 return -ENOMEM; 1053 1054 while (len) { 1055 transfer = min_t(size_t, len, 4096); 1056 memcpy(buf, data, transfer); 1057 1058 err = usb_control_msg(hif_dev->udev, 1059 usb_sndctrlpipe(hif_dev->udev, 0), 1060 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1061 addr >> 8, 0, buf, transfer, 1062 USB_MSG_TIMEOUT); 1063 if (err < 0) { 1064 kfree(buf); 1065 return err; 1066 } 1067 1068 len -= transfer; 1069 data += transfer; 1070 addr += transfer; 1071 } 1072 kfree(buf); 1073 1074 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1075 firm_offset = AR7010_FIRMWARE_TEXT; 1076 else 1077 firm_offset = AR9271_FIRMWARE_TEXT; 1078 1079 /* 1080 * Issue FW download complete command to firmware. 1081 */ 1082 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1083 FIRMWARE_DOWNLOAD_COMP, 1084 0x40 | USB_DIR_OUT, 1085 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1086 if (err) 1087 return -EIO; 1088 1089 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1090 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1091 1092 return 0; 1093 } 1094 1095 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1096 { 1097 int ret; 1098 1099 ret = ath9k_hif_usb_download_fw(hif_dev); 1100 if (ret) { 1101 dev_err(&hif_dev->udev->dev, 1102 "ath9k_htc: Firmware - %s download failed\n", 1103 hif_dev->fw_name); 1104 return ret; 1105 } 1106 1107 /* Alloc URBs */ 1108 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1109 if (ret) { 1110 dev_err(&hif_dev->udev->dev, 1111 "ath9k_htc: Unable to allocate URBs\n"); 1112 return ret; 1113 } 1114 1115 return 0; 1116 } 1117 1118 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1119 { 1120 ath9k_hif_usb_dealloc_urbs(hif_dev); 1121 } 1122 1123 /* 1124 * If initialization fails or the FW cannot be retrieved, 1125 * detach the device. 1126 */ 1127 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1128 { 1129 struct device *dev = &hif_dev->udev->dev; 1130 struct device *parent = dev->parent; 1131 1132 complete_all(&hif_dev->fw_done); 1133 1134 if (parent) 1135 device_lock(parent); 1136 1137 device_release_driver(dev); 1138 1139 if (parent) 1140 device_unlock(parent); 1141 } 1142 1143 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1144 1145 /* taken from iwlwifi */ 1146 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1147 bool first) 1148 { 1149 char index[8], *chip; 1150 int ret; 1151 1152 if (first) { 1153 if (htc_use_dev_fw) { 1154 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1155 sprintf(index, "%s", "dev"); 1156 } else { 1157 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1158 sprintf(index, "%d", hif_dev->fw_minor_index); 1159 } 1160 } else { 1161 hif_dev->fw_minor_index--; 1162 sprintf(index, "%d", hif_dev->fw_minor_index); 1163 } 1164 1165 /* test for FW 1.3 */ 1166 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1167 const char *filename; 1168 1169 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1170 filename = FIRMWARE_AR7010_1_1; 1171 else 1172 filename = FIRMWARE_AR9271; 1173 1174 /* expected fw locations: 1175 * - htc_9271.fw (stable version 1.3, depricated) 1176 */ 1177 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1178 "%s", filename); 1179 1180 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1181 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1182 1183 return -ENOENT; 1184 } else { 1185 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1186 chip = "7010"; 1187 else 1188 chip = "9271"; 1189 1190 /* expected fw locations: 1191 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1192 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1193 */ 1194 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1195 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1196 chip, MAJOR_VERSION_REQ, index); 1197 } 1198 1199 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1200 &hif_dev->udev->dev, GFP_KERNEL, 1201 hif_dev, ath9k_hif_usb_firmware_cb); 1202 if (ret) { 1203 dev_err(&hif_dev->udev->dev, 1204 "ath9k_htc: Async request for firmware %s failed\n", 1205 hif_dev->fw_name); 1206 return ret; 1207 } 1208 1209 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1210 hif_dev->fw_name); 1211 1212 return ret; 1213 } 1214 1215 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1216 { 1217 struct hif_device_usb *hif_dev = context; 1218 int ret; 1219 1220 if (!fw) { 1221 ret = ath9k_hif_request_firmware(hif_dev, false); 1222 if (!ret) 1223 return; 1224 1225 dev_err(&hif_dev->udev->dev, 1226 "ath9k_htc: Failed to get firmware %s\n", 1227 hif_dev->fw_name); 1228 goto err_fw; 1229 } 1230 1231 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1232 &hif_dev->udev->dev); 1233 if (hif_dev->htc_handle == NULL) 1234 goto err_dev_alloc; 1235 1236 hif_dev->fw_data = fw->data; 1237 hif_dev->fw_size = fw->size; 1238 1239 /* Proceed with initialization */ 1240 1241 ret = ath9k_hif_usb_dev_init(hif_dev); 1242 if (ret) 1243 goto err_dev_init; 1244 1245 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1246 &hif_dev->interface->dev, 1247 hif_dev->usb_device_id->idProduct, 1248 hif_dev->udev->product, 1249 hif_dev->usb_device_id->driver_info); 1250 if (ret) { 1251 ret = -EINVAL; 1252 goto err_htc_hw_init; 1253 } 1254 1255 release_firmware(fw); 1256 hif_dev->flags |= HIF_USB_READY; 1257 complete_all(&hif_dev->fw_done); 1258 1259 return; 1260 1261 err_htc_hw_init: 1262 ath9k_hif_usb_dev_deinit(hif_dev); 1263 err_dev_init: 1264 ath9k_htc_hw_free(hif_dev->htc_handle); 1265 err_dev_alloc: 1266 release_firmware(fw); 1267 err_fw: 1268 ath9k_hif_usb_firmware_fail(hif_dev); 1269 } 1270 1271 /* 1272 * An exact copy of the function from zd1211rw. 1273 */ 1274 static int send_eject_command(struct usb_interface *interface) 1275 { 1276 struct usb_device *udev = interface_to_usbdev(interface); 1277 struct usb_host_interface *iface_desc = interface->cur_altsetting; 1278 struct usb_endpoint_descriptor *endpoint; 1279 unsigned char *cmd; 1280 u8 bulk_out_ep; 1281 int r; 1282 1283 if (iface_desc->desc.bNumEndpoints < 2) 1284 return -ENODEV; 1285 1286 /* Find bulk out endpoint */ 1287 for (r = 1; r >= 0; r--) { 1288 endpoint = &iface_desc->endpoint[r].desc; 1289 if (usb_endpoint_dir_out(endpoint) && 1290 usb_endpoint_xfer_bulk(endpoint)) { 1291 bulk_out_ep = endpoint->bEndpointAddress; 1292 break; 1293 } 1294 } 1295 if (r == -1) { 1296 dev_err(&udev->dev, 1297 "ath9k_htc: Could not find bulk out endpoint\n"); 1298 return -ENODEV; 1299 } 1300 1301 cmd = kzalloc(31, GFP_KERNEL); 1302 if (cmd == NULL) 1303 return -ENODEV; 1304 1305 /* USB bulk command block */ 1306 cmd[0] = 0x55; /* bulk command signature */ 1307 cmd[1] = 0x53; /* bulk command signature */ 1308 cmd[2] = 0x42; /* bulk command signature */ 1309 cmd[3] = 0x43; /* bulk command signature */ 1310 cmd[14] = 6; /* command length */ 1311 1312 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1313 cmd[19] = 0x2; /* eject disc */ 1314 1315 dev_info(&udev->dev, "Ejecting storage device...\n"); 1316 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1317 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1318 kfree(cmd); 1319 if (r) 1320 return r; 1321 1322 /* At this point, the device disconnects and reconnects with the real 1323 * ID numbers. */ 1324 1325 usb_set_intfdata(interface, NULL); 1326 return 0; 1327 } 1328 1329 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1330 const struct usb_device_id *id) 1331 { 1332 struct usb_device *udev = interface_to_usbdev(interface); 1333 struct hif_device_usb *hif_dev; 1334 int ret = 0; 1335 1336 if (id->driver_info == STORAGE_DEVICE) 1337 return send_eject_command(interface); 1338 1339 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1340 if (!hif_dev) { 1341 ret = -ENOMEM; 1342 goto err_alloc; 1343 } 1344 1345 usb_get_dev(udev); 1346 1347 hif_dev->udev = udev; 1348 hif_dev->interface = interface; 1349 hif_dev->usb_device_id = id; 1350 #ifdef CONFIG_PM 1351 udev->reset_resume = 1; 1352 #endif 1353 usb_set_intfdata(interface, hif_dev); 1354 1355 init_completion(&hif_dev->fw_done); 1356 1357 ret = ath9k_hif_request_firmware(hif_dev, true); 1358 if (ret) 1359 goto err_fw_req; 1360 1361 return ret; 1362 1363 err_fw_req: 1364 usb_set_intfdata(interface, NULL); 1365 kfree(hif_dev); 1366 usb_put_dev(udev); 1367 err_alloc: 1368 return ret; 1369 } 1370 1371 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1372 { 1373 u32 reboot_cmd = 0xffffffff; 1374 void *buf; 1375 int ret; 1376 1377 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1378 if (!buf) 1379 return; 1380 1381 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1382 buf, 4, NULL, USB_MSG_TIMEOUT); 1383 if (ret) 1384 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1385 1386 kfree(buf); 1387 } 1388 1389 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1390 { 1391 struct usb_device *udev = interface_to_usbdev(interface); 1392 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1393 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1394 1395 if (!hif_dev) 1396 return; 1397 1398 wait_for_completion(&hif_dev->fw_done); 1399 1400 if (hif_dev->flags & HIF_USB_READY) { 1401 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1402 ath9k_hif_usb_dev_deinit(hif_dev); 1403 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); 1404 ath9k_htc_hw_free(hif_dev->htc_handle); 1405 } 1406 1407 usb_set_intfdata(interface, NULL); 1408 1409 /* If firmware was loaded we should drop it 1410 * go back to first stage bootloader. */ 1411 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1412 ath9k_hif_usb_reboot(udev); 1413 1414 kfree(hif_dev); 1415 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1416 usb_put_dev(udev); 1417 } 1418 1419 #ifdef CONFIG_PM 1420 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1421 pm_message_t message) 1422 { 1423 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1424 1425 /* 1426 * The device has to be set to FULLSLEEP mode in case no 1427 * interface is up. 1428 */ 1429 if (!(hif_dev->flags & HIF_USB_START)) 1430 ath9k_htc_suspend(hif_dev->htc_handle); 1431 1432 wait_for_completion(&hif_dev->fw_done); 1433 1434 if (hif_dev->flags & HIF_USB_READY) 1435 ath9k_hif_usb_dealloc_urbs(hif_dev); 1436 1437 return 0; 1438 } 1439 1440 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1441 { 1442 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1443 struct htc_target *htc_handle = hif_dev->htc_handle; 1444 int ret; 1445 const struct firmware *fw; 1446 1447 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1448 if (ret) 1449 return ret; 1450 1451 if (hif_dev->flags & HIF_USB_READY) { 1452 /* request cached firmware during suspend/resume cycle */ 1453 ret = request_firmware(&fw, hif_dev->fw_name, 1454 &hif_dev->udev->dev); 1455 if (ret) 1456 goto fail_resume; 1457 1458 hif_dev->fw_data = fw->data; 1459 hif_dev->fw_size = fw->size; 1460 ret = ath9k_hif_usb_download_fw(hif_dev); 1461 release_firmware(fw); 1462 if (ret) 1463 goto fail_resume; 1464 } else { 1465 ath9k_hif_usb_dealloc_urbs(hif_dev); 1466 return -EIO; 1467 } 1468 1469 mdelay(100); 1470 1471 ret = ath9k_htc_resume(htc_handle); 1472 1473 if (ret) 1474 goto fail_resume; 1475 1476 return 0; 1477 1478 fail_resume: 1479 ath9k_hif_usb_dealloc_urbs(hif_dev); 1480 1481 return ret; 1482 } 1483 #endif 1484 1485 static struct usb_driver ath9k_hif_usb_driver = { 1486 .name = KBUILD_MODNAME, 1487 .probe = ath9k_hif_usb_probe, 1488 .disconnect = ath9k_hif_usb_disconnect, 1489 #ifdef CONFIG_PM 1490 .suspend = ath9k_hif_usb_suspend, 1491 .resume = ath9k_hif_usb_resume, 1492 .reset_resume = ath9k_hif_usb_resume, 1493 #endif 1494 .id_table = ath9k_hif_usb_ids, 1495 .soft_unbind = 1, 1496 .disable_hub_initiated_lpm = 1, 1497 }; 1498 1499 int ath9k_hif_usb_init(void) 1500 { 1501 return usb_register(&ath9k_hif_usb_driver); 1502 } 1503 1504 void ath9k_hif_usb_exit(void) 1505 { 1506 usb_deregister(&ath9k_hif_usb_driver); 1507 } 1508