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(hif_dev, skb_success); 248 TX_STAT_ADD(hif_dev, skb_success_bytes, ln); 249 } 250 else 251 TX_STAT_INC(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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(hif_dev, 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 int ret; 712 713 if (!skb) 714 return; 715 716 if (!hif_dev) 717 goto free_skb; 718 719 switch (urb->status) { 720 case 0: 721 break; 722 case -ENOENT: 723 case -ECONNRESET: 724 case -ENODEV: 725 case -ESHUTDOWN: 726 goto free_skb; 727 default: 728 skb_reset_tail_pointer(skb); 729 skb_trim(skb, 0); 730 731 goto resubmit; 732 } 733 734 if (likely(urb->actual_length != 0)) { 735 skb_put(skb, urb->actual_length); 736 737 /* 738 * Process the command first. 739 * skb is either freed here or passed to be 740 * managed to another callback function. 741 */ 742 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 743 skb->len, USB_REG_IN_PIPE); 744 745 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 746 if (!skb) { 747 dev_err(&hif_dev->udev->dev, 748 "ath9k_htc: REG_IN memory allocation failure\n"); 749 goto free_rx_buf; 750 } 751 752 rx_buf->skb = skb; 753 754 usb_fill_int_urb(urb, hif_dev->udev, 755 usb_rcvintpipe(hif_dev->udev, 756 USB_REG_IN_PIPE), 757 skb->data, MAX_REG_IN_BUF_SIZE, 758 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 759 } 760 761 resubmit: 762 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 763 ret = usb_submit_urb(urb, GFP_ATOMIC); 764 if (ret) { 765 usb_unanchor_urb(urb); 766 goto free_skb; 767 } 768 769 return; 770 free_skb: 771 kfree_skb(skb); 772 free_rx_buf: 773 kfree(rx_buf); 774 urb->context = NULL; 775 } 776 777 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 778 { 779 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 780 unsigned long flags; 781 782 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 783 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 784 &hif_dev->tx.tx_buf, list) { 785 list_del(&tx_buf->list); 786 usb_free_urb(tx_buf->urb); 787 kfree(tx_buf->buf); 788 kfree(tx_buf); 789 } 790 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 791 792 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 793 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 794 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 795 796 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 797 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 798 &hif_dev->tx.tx_pending, list) { 799 usb_get_urb(tx_buf->urb); 800 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 801 usb_kill_urb(tx_buf->urb); 802 list_del(&tx_buf->list); 803 usb_free_urb(tx_buf->urb); 804 kfree(tx_buf->buf); 805 kfree(tx_buf); 806 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 807 } 808 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 809 810 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 811 } 812 813 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 814 { 815 struct tx_buf *tx_buf; 816 int i; 817 818 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 819 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 820 spin_lock_init(&hif_dev->tx.tx_lock); 821 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 822 init_usb_anchor(&hif_dev->mgmt_submitted); 823 824 for (i = 0; i < MAX_TX_URB_NUM; i++) { 825 tx_buf = kzalloc(sizeof(*tx_buf), GFP_KERNEL); 826 if (!tx_buf) 827 goto err; 828 829 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 830 if (!tx_buf->buf) 831 goto err; 832 833 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 834 if (!tx_buf->urb) 835 goto err; 836 837 tx_buf->hif_dev = hif_dev; 838 __skb_queue_head_init(&tx_buf->skb_queue); 839 840 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 841 } 842 843 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 844 845 return 0; 846 err: 847 if (tx_buf) { 848 kfree(tx_buf->buf); 849 kfree(tx_buf); 850 } 851 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 852 return -ENOMEM; 853 } 854 855 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 856 { 857 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 858 } 859 860 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 861 { 862 struct rx_buf *rx_buf = NULL; 863 struct sk_buff *skb = NULL; 864 struct urb *urb = NULL; 865 int i, ret; 866 867 init_usb_anchor(&hif_dev->rx_submitted); 868 spin_lock_init(&hif_dev->rx_lock); 869 870 for (i = 0; i < MAX_RX_URB_NUM; i++) { 871 872 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 873 if (!rx_buf) { 874 ret = -ENOMEM; 875 goto err_rxb; 876 } 877 878 /* Allocate URB */ 879 urb = usb_alloc_urb(0, GFP_KERNEL); 880 if (urb == NULL) { 881 ret = -ENOMEM; 882 goto err_urb; 883 } 884 885 /* Allocate buffer */ 886 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 887 if (!skb) { 888 ret = -ENOMEM; 889 goto err_skb; 890 } 891 892 rx_buf->hif_dev = hif_dev; 893 rx_buf->skb = skb; 894 895 usb_fill_bulk_urb(urb, hif_dev->udev, 896 usb_rcvbulkpipe(hif_dev->udev, 897 USB_WLAN_RX_PIPE), 898 skb->data, MAX_RX_BUF_SIZE, 899 ath9k_hif_usb_rx_cb, rx_buf); 900 901 /* Anchor URB */ 902 usb_anchor_urb(urb, &hif_dev->rx_submitted); 903 904 /* Submit URB */ 905 ret = usb_submit_urb(urb, GFP_KERNEL); 906 if (ret) { 907 usb_unanchor_urb(urb); 908 goto err_submit; 909 } 910 911 /* 912 * Drop reference count. 913 * This ensures that the URB is freed when killing them. 914 */ 915 usb_free_urb(urb); 916 } 917 918 return 0; 919 920 err_submit: 921 kfree_skb(skb); 922 err_skb: 923 usb_free_urb(urb); 924 err_urb: 925 kfree(rx_buf); 926 err_rxb: 927 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 928 return ret; 929 } 930 931 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 932 { 933 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 934 } 935 936 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 937 { 938 struct rx_buf *rx_buf = NULL; 939 struct sk_buff *skb = NULL; 940 struct urb *urb = NULL; 941 int i, ret; 942 943 init_usb_anchor(&hif_dev->reg_in_submitted); 944 945 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 946 947 rx_buf = kzalloc(sizeof(*rx_buf), GFP_KERNEL); 948 if (!rx_buf) { 949 ret = -ENOMEM; 950 goto err_rxb; 951 } 952 953 /* Allocate URB */ 954 urb = usb_alloc_urb(0, GFP_KERNEL); 955 if (urb == NULL) { 956 ret = -ENOMEM; 957 goto err_urb; 958 } 959 960 /* Allocate buffer */ 961 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 962 if (!skb) { 963 ret = -ENOMEM; 964 goto err_skb; 965 } 966 967 rx_buf->hif_dev = hif_dev; 968 rx_buf->skb = skb; 969 970 usb_fill_int_urb(urb, hif_dev->udev, 971 usb_rcvintpipe(hif_dev->udev, 972 USB_REG_IN_PIPE), 973 skb->data, MAX_REG_IN_BUF_SIZE, 974 ath9k_hif_usb_reg_in_cb, rx_buf, 1); 975 976 /* Anchor URB */ 977 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 978 979 /* Submit URB */ 980 ret = usb_submit_urb(urb, GFP_KERNEL); 981 if (ret) { 982 usb_unanchor_urb(urb); 983 goto err_submit; 984 } 985 986 /* 987 * Drop reference count. 988 * This ensures that the URB is freed when killing them. 989 */ 990 usb_free_urb(urb); 991 } 992 993 return 0; 994 995 err_submit: 996 kfree_skb(skb); 997 err_skb: 998 usb_free_urb(urb); 999 err_urb: 1000 kfree(rx_buf); 1001 err_rxb: 1002 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1003 return ret; 1004 } 1005 1006 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 1007 { 1008 /* Register Write */ 1009 init_usb_anchor(&hif_dev->regout_submitted); 1010 1011 /* TX */ 1012 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 1013 goto err; 1014 1015 /* RX */ 1016 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 1017 goto err_rx; 1018 1019 /* Register Read */ 1020 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 1021 goto err_reg; 1022 1023 return 0; 1024 err_reg: 1025 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1026 err_rx: 1027 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1028 err: 1029 return -ENOMEM; 1030 } 1031 1032 void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 1033 { 1034 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 1035 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 1036 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 1037 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 1038 } 1039 1040 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev) 1041 { 1042 int transfer, err; 1043 const void *data = hif_dev->fw_data; 1044 size_t len = hif_dev->fw_size; 1045 u32 addr = AR9271_FIRMWARE; 1046 u8 *buf = kzalloc(4096, GFP_KERNEL); 1047 u32 firm_offset; 1048 1049 if (!buf) 1050 return -ENOMEM; 1051 1052 while (len) { 1053 transfer = min_t(size_t, len, 4096); 1054 memcpy(buf, data, transfer); 1055 1056 err = usb_control_msg(hif_dev->udev, 1057 usb_sndctrlpipe(hif_dev->udev, 0), 1058 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 1059 addr >> 8, 0, buf, transfer, 1060 USB_MSG_TIMEOUT); 1061 if (err < 0) { 1062 kfree(buf); 1063 return err; 1064 } 1065 1066 len -= transfer; 1067 data += transfer; 1068 addr += transfer; 1069 } 1070 kfree(buf); 1071 1072 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1073 firm_offset = AR7010_FIRMWARE_TEXT; 1074 else 1075 firm_offset = AR9271_FIRMWARE_TEXT; 1076 1077 /* 1078 * Issue FW download complete command to firmware. 1079 */ 1080 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1081 FIRMWARE_DOWNLOAD_COMP, 1082 0x40 | USB_DIR_OUT, 1083 firm_offset >> 8, 0, NULL, 0, USB_MSG_TIMEOUT); 1084 if (err) 1085 return -EIO; 1086 1087 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1088 hif_dev->fw_name, (unsigned long) hif_dev->fw_size); 1089 1090 return 0; 1091 } 1092 1093 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev) 1094 { 1095 int ret; 1096 1097 ret = ath9k_hif_usb_download_fw(hif_dev); 1098 if (ret) { 1099 dev_err(&hif_dev->udev->dev, 1100 "ath9k_htc: Firmware - %s download failed\n", 1101 hif_dev->fw_name); 1102 return ret; 1103 } 1104 1105 /* Alloc URBs */ 1106 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1107 if (ret) { 1108 dev_err(&hif_dev->udev->dev, 1109 "ath9k_htc: Unable to allocate URBs\n"); 1110 return ret; 1111 } 1112 1113 return 0; 1114 } 1115 1116 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1117 { 1118 ath9k_hif_usb_dealloc_urbs(hif_dev); 1119 } 1120 1121 /* 1122 * If initialization fails or the FW cannot be retrieved, 1123 * detach the device. 1124 */ 1125 static void ath9k_hif_usb_firmware_fail(struct hif_device_usb *hif_dev) 1126 { 1127 struct device *dev = &hif_dev->udev->dev; 1128 struct device *parent = dev->parent; 1129 1130 complete_all(&hif_dev->fw_done); 1131 1132 if (parent) 1133 device_lock(parent); 1134 1135 device_release_driver(dev); 1136 1137 if (parent) 1138 device_unlock(parent); 1139 } 1140 1141 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context); 1142 1143 /* taken from iwlwifi */ 1144 static int ath9k_hif_request_firmware(struct hif_device_usb *hif_dev, 1145 bool first) 1146 { 1147 char index[8], *chip; 1148 int ret; 1149 1150 if (first) { 1151 if (htc_use_dev_fw) { 1152 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX + 1; 1153 sprintf(index, "%s", "dev"); 1154 } else { 1155 hif_dev->fw_minor_index = FIRMWARE_MINOR_IDX_MAX; 1156 sprintf(index, "%d", hif_dev->fw_minor_index); 1157 } 1158 } else { 1159 hif_dev->fw_minor_index--; 1160 sprintf(index, "%d", hif_dev->fw_minor_index); 1161 } 1162 1163 /* test for FW 1.3 */ 1164 if (MAJOR_VERSION_REQ == 1 && hif_dev->fw_minor_index == 3) { 1165 const char *filename; 1166 1167 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1168 filename = FIRMWARE_AR7010_1_1; 1169 else 1170 filename = FIRMWARE_AR9271; 1171 1172 /* expected fw locations: 1173 * - htc_9271.fw (stable version 1.3, depricated) 1174 */ 1175 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1176 "%s", filename); 1177 1178 } else if (hif_dev->fw_minor_index < FIRMWARE_MINOR_IDX_MIN) { 1179 dev_err(&hif_dev->udev->dev, "no suitable firmware found!\n"); 1180 1181 return -ENOENT; 1182 } else { 1183 if (IS_AR7010_DEVICE(hif_dev->usb_device_id->driver_info)) 1184 chip = "7010"; 1185 else 1186 chip = "9271"; 1187 1188 /* expected fw locations: 1189 * - ath9k_htc/htc_9271-1.dev.0.fw (development version) 1190 * - ath9k_htc/htc_9271-1.4.0.fw (stable version) 1191 */ 1192 snprintf(hif_dev->fw_name, sizeof(hif_dev->fw_name), 1193 "%s/htc_%s-%d.%s.0.fw", HTC_FW_PATH, 1194 chip, MAJOR_VERSION_REQ, index); 1195 } 1196 1197 ret = request_firmware_nowait(THIS_MODULE, true, hif_dev->fw_name, 1198 &hif_dev->udev->dev, GFP_KERNEL, 1199 hif_dev, ath9k_hif_usb_firmware_cb); 1200 if (ret) { 1201 dev_err(&hif_dev->udev->dev, 1202 "ath9k_htc: Async request for firmware %s failed\n", 1203 hif_dev->fw_name); 1204 return ret; 1205 } 1206 1207 dev_info(&hif_dev->udev->dev, "ath9k_htc: Firmware %s requested\n", 1208 hif_dev->fw_name); 1209 1210 return ret; 1211 } 1212 1213 static void ath9k_hif_usb_firmware_cb(const struct firmware *fw, void *context) 1214 { 1215 struct hif_device_usb *hif_dev = context; 1216 int ret; 1217 1218 if (!fw) { 1219 ret = ath9k_hif_request_firmware(hif_dev, false); 1220 if (!ret) 1221 return; 1222 1223 dev_err(&hif_dev->udev->dev, 1224 "ath9k_htc: Failed to get firmware %s\n", 1225 hif_dev->fw_name); 1226 goto err_fw; 1227 } 1228 1229 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1230 &hif_dev->udev->dev); 1231 if (hif_dev->htc_handle == NULL) 1232 goto err_dev_alloc; 1233 1234 hif_dev->fw_data = fw->data; 1235 hif_dev->fw_size = fw->size; 1236 1237 /* Proceed with initialization */ 1238 1239 ret = ath9k_hif_usb_dev_init(hif_dev); 1240 if (ret) 1241 goto err_dev_init; 1242 1243 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1244 &hif_dev->interface->dev, 1245 hif_dev->usb_device_id->idProduct, 1246 hif_dev->udev->product, 1247 hif_dev->usb_device_id->driver_info); 1248 if (ret) { 1249 ret = -EINVAL; 1250 goto err_htc_hw_init; 1251 } 1252 1253 release_firmware(fw); 1254 hif_dev->flags |= HIF_USB_READY; 1255 complete_all(&hif_dev->fw_done); 1256 1257 return; 1258 1259 err_htc_hw_init: 1260 ath9k_hif_usb_dev_deinit(hif_dev); 1261 err_dev_init: 1262 ath9k_htc_hw_free(hif_dev->htc_handle); 1263 err_dev_alloc: 1264 release_firmware(fw); 1265 err_fw: 1266 ath9k_hif_usb_firmware_fail(hif_dev); 1267 } 1268 1269 /* 1270 * An exact copy of the function from zd1211rw. 1271 */ 1272 static int send_eject_command(struct usb_interface *interface) 1273 { 1274 struct usb_device *udev = interface_to_usbdev(interface); 1275 struct usb_host_interface *iface_desc = interface->cur_altsetting; 1276 struct usb_endpoint_descriptor *endpoint; 1277 unsigned char *cmd; 1278 u8 bulk_out_ep; 1279 int r; 1280 1281 if (iface_desc->desc.bNumEndpoints < 2) 1282 return -ENODEV; 1283 1284 /* Find bulk out endpoint */ 1285 for (r = 1; r >= 0; r--) { 1286 endpoint = &iface_desc->endpoint[r].desc; 1287 if (usb_endpoint_dir_out(endpoint) && 1288 usb_endpoint_xfer_bulk(endpoint)) { 1289 bulk_out_ep = endpoint->bEndpointAddress; 1290 break; 1291 } 1292 } 1293 if (r == -1) { 1294 dev_err(&udev->dev, 1295 "ath9k_htc: Could not find bulk out endpoint\n"); 1296 return -ENODEV; 1297 } 1298 1299 cmd = kzalloc(31, GFP_KERNEL); 1300 if (cmd == NULL) 1301 return -ENODEV; 1302 1303 /* USB bulk command block */ 1304 cmd[0] = 0x55; /* bulk command signature */ 1305 cmd[1] = 0x53; /* bulk command signature */ 1306 cmd[2] = 0x42; /* bulk command signature */ 1307 cmd[3] = 0x43; /* bulk command signature */ 1308 cmd[14] = 6; /* command length */ 1309 1310 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1311 cmd[19] = 0x2; /* eject disc */ 1312 1313 dev_info(&udev->dev, "Ejecting storage device...\n"); 1314 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1315 cmd, 31, NULL, 2 * USB_MSG_TIMEOUT); 1316 kfree(cmd); 1317 if (r) 1318 return r; 1319 1320 /* At this point, the device disconnects and reconnects with the real 1321 * ID numbers. */ 1322 1323 usb_set_intfdata(interface, NULL); 1324 return 0; 1325 } 1326 1327 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1328 const struct usb_device_id *id) 1329 { 1330 struct usb_endpoint_descriptor *bulk_in, *bulk_out, *int_in, *int_out; 1331 struct usb_device *udev = interface_to_usbdev(interface); 1332 struct usb_host_interface *alt; 1333 struct hif_device_usb *hif_dev; 1334 int ret = 0; 1335 1336 /* Verify the expected endpoints are present */ 1337 alt = interface->cur_altsetting; 1338 if (usb_find_common_endpoints(alt, &bulk_in, &bulk_out, &int_in, &int_out) < 0 || 1339 usb_endpoint_num(bulk_in) != USB_WLAN_RX_PIPE || 1340 usb_endpoint_num(bulk_out) != USB_WLAN_TX_PIPE || 1341 usb_endpoint_num(int_in) != USB_REG_IN_PIPE || 1342 usb_endpoint_num(int_out) != USB_REG_OUT_PIPE) { 1343 dev_err(&udev->dev, 1344 "ath9k_htc: Device endpoint numbers are not the expected ones\n"); 1345 return -ENODEV; 1346 } 1347 1348 if (id->driver_info == STORAGE_DEVICE) 1349 return send_eject_command(interface); 1350 1351 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1352 if (!hif_dev) { 1353 ret = -ENOMEM; 1354 goto err_alloc; 1355 } 1356 1357 usb_get_dev(udev); 1358 1359 hif_dev->udev = udev; 1360 hif_dev->interface = interface; 1361 hif_dev->usb_device_id = id; 1362 #ifdef CONFIG_PM 1363 udev->reset_resume = 1; 1364 #endif 1365 usb_set_intfdata(interface, hif_dev); 1366 1367 init_completion(&hif_dev->fw_done); 1368 1369 ret = ath9k_hif_request_firmware(hif_dev, true); 1370 if (ret) 1371 goto err_fw_req; 1372 1373 return ret; 1374 1375 err_fw_req: 1376 usb_set_intfdata(interface, NULL); 1377 kfree(hif_dev); 1378 usb_put_dev(udev); 1379 err_alloc: 1380 return ret; 1381 } 1382 1383 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1384 { 1385 u32 reboot_cmd = 0xffffffff; 1386 void *buf; 1387 int ret; 1388 1389 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1390 if (!buf) 1391 return; 1392 1393 ret = usb_interrupt_msg(udev, usb_sndintpipe(udev, USB_REG_OUT_PIPE), 1394 buf, 4, NULL, USB_MSG_TIMEOUT); 1395 if (ret) 1396 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1397 1398 kfree(buf); 1399 } 1400 1401 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1402 { 1403 struct usb_device *udev = interface_to_usbdev(interface); 1404 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1405 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1406 1407 if (!hif_dev) 1408 return; 1409 1410 wait_for_completion(&hif_dev->fw_done); 1411 1412 if (hif_dev->flags & HIF_USB_READY) { 1413 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1414 ath9k_hif_usb_dev_deinit(hif_dev); 1415 ath9k_destroy_wmi(hif_dev->htc_handle->drv_priv); 1416 ath9k_htc_hw_free(hif_dev->htc_handle); 1417 } 1418 1419 usb_set_intfdata(interface, NULL); 1420 1421 /* If firmware was loaded we should drop it 1422 * go back to first stage bootloader. */ 1423 if (!unplugged && (hif_dev->flags & HIF_USB_READY)) 1424 ath9k_hif_usb_reboot(udev); 1425 1426 kfree(hif_dev); 1427 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1428 usb_put_dev(udev); 1429 } 1430 1431 #ifdef CONFIG_PM 1432 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1433 pm_message_t message) 1434 { 1435 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1436 1437 /* 1438 * The device has to be set to FULLSLEEP mode in case no 1439 * interface is up. 1440 */ 1441 if (!(hif_dev->flags & HIF_USB_START)) 1442 ath9k_htc_suspend(hif_dev->htc_handle); 1443 1444 wait_for_completion(&hif_dev->fw_done); 1445 1446 if (hif_dev->flags & HIF_USB_READY) 1447 ath9k_hif_usb_dealloc_urbs(hif_dev); 1448 1449 return 0; 1450 } 1451 1452 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1453 { 1454 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1455 struct htc_target *htc_handle = hif_dev->htc_handle; 1456 int ret; 1457 const struct firmware *fw; 1458 1459 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1460 if (ret) 1461 return ret; 1462 1463 if (hif_dev->flags & HIF_USB_READY) { 1464 /* request cached firmware during suspend/resume cycle */ 1465 ret = request_firmware(&fw, hif_dev->fw_name, 1466 &hif_dev->udev->dev); 1467 if (ret) 1468 goto fail_resume; 1469 1470 hif_dev->fw_data = fw->data; 1471 hif_dev->fw_size = fw->size; 1472 ret = ath9k_hif_usb_download_fw(hif_dev); 1473 release_firmware(fw); 1474 if (ret) 1475 goto fail_resume; 1476 } else { 1477 ath9k_hif_usb_dealloc_urbs(hif_dev); 1478 return -EIO; 1479 } 1480 1481 mdelay(100); 1482 1483 ret = ath9k_htc_resume(htc_handle); 1484 1485 if (ret) 1486 goto fail_resume; 1487 1488 return 0; 1489 1490 fail_resume: 1491 ath9k_hif_usb_dealloc_urbs(hif_dev); 1492 1493 return ret; 1494 } 1495 #endif 1496 1497 static struct usb_driver ath9k_hif_usb_driver = { 1498 .name = KBUILD_MODNAME, 1499 .probe = ath9k_hif_usb_probe, 1500 .disconnect = ath9k_hif_usb_disconnect, 1501 #ifdef CONFIG_PM 1502 .suspend = ath9k_hif_usb_suspend, 1503 .resume = ath9k_hif_usb_resume, 1504 .reset_resume = ath9k_hif_usb_resume, 1505 #endif 1506 .id_table = ath9k_hif_usb_ids, 1507 .soft_unbind = 1, 1508 .disable_hub_initiated_lpm = 1, 1509 }; 1510 1511 int ath9k_hif_usb_init(void) 1512 { 1513 return usb_register(&ath9k_hif_usb_driver); 1514 } 1515 1516 void ath9k_hif_usb_exit(void) 1517 { 1518 usb_deregister(&ath9k_hif_usb_driver); 1519 } 1520