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 /* identify firmware images */ 21 #define FIRMWARE_AR7010_1_1 "htc_7010.fw" 22 #define FIRMWARE_AR9271 "htc_9271.fw" 23 24 MODULE_FIRMWARE(FIRMWARE_AR7010_1_1); 25 MODULE_FIRMWARE(FIRMWARE_AR9271); 26 27 static struct usb_device_id ath9k_hif_usb_ids[] = { 28 { USB_DEVICE(0x0cf3, 0x9271) }, /* Atheros */ 29 { USB_DEVICE(0x0cf3, 0x1006) }, /* Atheros */ 30 { USB_DEVICE(0x0846, 0x9030) }, /* Netgear N150 */ 31 { USB_DEVICE(0x07D1, 0x3A10) }, /* Dlink Wireless 150 */ 32 { USB_DEVICE(0x13D3, 0x3327) }, /* Azurewave */ 33 { USB_DEVICE(0x13D3, 0x3328) }, /* Azurewave */ 34 { USB_DEVICE(0x13D3, 0x3346) }, /* IMC Networks */ 35 { USB_DEVICE(0x13D3, 0x3348) }, /* Azurewave */ 36 { USB_DEVICE(0x13D3, 0x3349) }, /* Azurewave */ 37 { USB_DEVICE(0x13D3, 0x3350) }, /* Azurewave */ 38 { USB_DEVICE(0x04CA, 0x4605) }, /* Liteon */ 39 { USB_DEVICE(0x040D, 0x3801) }, /* VIA */ 40 { USB_DEVICE(0x0cf3, 0xb003) }, /* Ubiquiti WifiStation Ext */ 41 42 { USB_DEVICE(0x0cf3, 0x7015), 43 .driver_info = AR9287_USB }, /* Atheros */ 44 { USB_DEVICE(0x1668, 0x1200), 45 .driver_info = AR9287_USB }, /* Verizon */ 46 47 { USB_DEVICE(0x0cf3, 0x7010), 48 .driver_info = AR9280_USB }, /* Atheros */ 49 { USB_DEVICE(0x0846, 0x9018), 50 .driver_info = AR9280_USB }, /* Netgear WNDA3200 */ 51 { USB_DEVICE(0x083A, 0xA704), 52 .driver_info = AR9280_USB }, /* SMC Networks */ 53 { USB_DEVICE(0x0411, 0x017f), 54 .driver_info = AR9280_USB }, /* Sony UWA-BR100 */ 55 56 { USB_DEVICE(0x0cf3, 0x20ff), 57 .driver_info = STORAGE_DEVICE }, 58 59 { }, 60 }; 61 62 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); 63 64 static int __hif_usb_tx(struct hif_device_usb *hif_dev); 65 66 static void hif_usb_regout_cb(struct urb *urb) 67 { 68 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 69 70 switch (urb->status) { 71 case 0: 72 break; 73 case -ENOENT: 74 case -ECONNRESET: 75 case -ENODEV: 76 case -ESHUTDOWN: 77 goto free; 78 default: 79 break; 80 } 81 82 if (cmd) { 83 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 84 cmd->skb, true); 85 kfree(cmd); 86 } 87 88 return; 89 free: 90 kfree_skb(cmd->skb); 91 kfree(cmd); 92 } 93 94 static int hif_usb_send_regout(struct hif_device_usb *hif_dev, 95 struct sk_buff *skb) 96 { 97 struct urb *urb; 98 struct cmd_buf *cmd; 99 int ret = 0; 100 101 urb = usb_alloc_urb(0, GFP_KERNEL); 102 if (urb == NULL) 103 return -ENOMEM; 104 105 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 106 if (cmd == NULL) { 107 usb_free_urb(urb); 108 return -ENOMEM; 109 } 110 111 cmd->skb = skb; 112 cmd->hif_dev = hif_dev; 113 114 usb_fill_bulk_urb(urb, hif_dev->udev, 115 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE), 116 skb->data, skb->len, 117 hif_usb_regout_cb, cmd); 118 119 usb_anchor_urb(urb, &hif_dev->regout_submitted); 120 ret = usb_submit_urb(urb, GFP_KERNEL); 121 if (ret) { 122 usb_unanchor_urb(urb); 123 kfree(cmd); 124 } 125 usb_free_urb(urb); 126 127 return ret; 128 } 129 130 static void hif_usb_mgmt_cb(struct urb *urb) 131 { 132 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 133 struct hif_device_usb *hif_dev; 134 bool txok = true; 135 136 if (!cmd || !cmd->skb || !cmd->hif_dev) 137 return; 138 139 hif_dev = cmd->hif_dev; 140 141 switch (urb->status) { 142 case 0: 143 break; 144 case -ENOENT: 145 case -ECONNRESET: 146 case -ENODEV: 147 case -ESHUTDOWN: 148 txok = false; 149 150 /* 151 * If the URBs are being flushed, no need to complete 152 * this packet. 153 */ 154 spin_lock(&hif_dev->tx.tx_lock); 155 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 156 spin_unlock(&hif_dev->tx.tx_lock); 157 dev_kfree_skb_any(cmd->skb); 158 kfree(cmd); 159 return; 160 } 161 spin_unlock(&hif_dev->tx.tx_lock); 162 163 break; 164 default: 165 txok = false; 166 break; 167 } 168 169 skb_pull(cmd->skb, 4); 170 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 171 cmd->skb, txok); 172 kfree(cmd); 173 } 174 175 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 176 struct sk_buff *skb) 177 { 178 struct urb *urb; 179 struct cmd_buf *cmd; 180 int ret = 0; 181 __le16 *hdr; 182 183 urb = usb_alloc_urb(0, GFP_ATOMIC); 184 if (urb == NULL) 185 return -ENOMEM; 186 187 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 188 if (cmd == NULL) { 189 usb_free_urb(urb); 190 return -ENOMEM; 191 } 192 193 cmd->skb = skb; 194 cmd->hif_dev = hif_dev; 195 196 hdr = (__le16 *) skb_push(skb, 4); 197 *hdr++ = cpu_to_le16(skb->len - 4); 198 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 199 200 usb_fill_bulk_urb(urb, hif_dev->udev, 201 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 202 skb->data, skb->len, 203 hif_usb_mgmt_cb, cmd); 204 205 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 206 ret = usb_submit_urb(urb, GFP_ATOMIC); 207 if (ret) { 208 usb_unanchor_urb(urb); 209 kfree(cmd); 210 } 211 usb_free_urb(urb); 212 213 return ret; 214 } 215 216 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 217 struct sk_buff_head *list) 218 { 219 struct sk_buff *skb; 220 221 while ((skb = __skb_dequeue(list)) != NULL) { 222 dev_kfree_skb_any(skb); 223 } 224 } 225 226 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 227 struct sk_buff_head *queue, 228 bool txok) 229 { 230 struct sk_buff *skb; 231 232 while ((skb = __skb_dequeue(queue)) != NULL) { 233 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 234 skb, txok); 235 if (txok) 236 TX_STAT_INC(skb_success); 237 else 238 TX_STAT_INC(skb_failed); 239 } 240 } 241 242 static void hif_usb_tx_cb(struct urb *urb) 243 { 244 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 245 struct hif_device_usb *hif_dev; 246 bool txok = true; 247 248 if (!tx_buf || !tx_buf->hif_dev) 249 return; 250 251 hif_dev = tx_buf->hif_dev; 252 253 switch (urb->status) { 254 case 0: 255 break; 256 case -ENOENT: 257 case -ECONNRESET: 258 case -ENODEV: 259 case -ESHUTDOWN: 260 txok = false; 261 262 /* 263 * If the URBs are being flushed, no need to add this 264 * URB to the free list. 265 */ 266 spin_lock(&hif_dev->tx.tx_lock); 267 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 268 spin_unlock(&hif_dev->tx.tx_lock); 269 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 270 return; 271 } 272 spin_unlock(&hif_dev->tx.tx_lock); 273 274 break; 275 default: 276 txok = false; 277 break; 278 } 279 280 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 281 282 /* Re-initialize the SKB queue */ 283 tx_buf->len = tx_buf->offset = 0; 284 __skb_queue_head_init(&tx_buf->skb_queue); 285 286 /* Add this TX buffer to the free list */ 287 spin_lock(&hif_dev->tx.tx_lock); 288 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 289 hif_dev->tx.tx_buf_cnt++; 290 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 291 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 292 TX_STAT_INC(buf_completed); 293 spin_unlock(&hif_dev->tx.tx_lock); 294 } 295 296 /* TX lock has to be taken */ 297 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 298 { 299 struct tx_buf *tx_buf = NULL; 300 struct sk_buff *nskb = NULL; 301 int ret = 0, i; 302 u16 tx_skb_cnt = 0; 303 u8 *buf; 304 __le16 *hdr; 305 306 if (hif_dev->tx.tx_skb_cnt == 0) 307 return 0; 308 309 /* Check if a free TX buffer is available */ 310 if (list_empty(&hif_dev->tx.tx_buf)) 311 return 0; 312 313 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 314 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 315 hif_dev->tx.tx_buf_cnt--; 316 317 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 318 319 for (i = 0; i < tx_skb_cnt; i++) { 320 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 321 322 /* Should never be NULL */ 323 BUG_ON(!nskb); 324 325 hif_dev->tx.tx_skb_cnt--; 326 327 buf = tx_buf->buf; 328 buf += tx_buf->offset; 329 hdr = (__le16 *)buf; 330 *hdr++ = cpu_to_le16(nskb->len); 331 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 332 buf += 4; 333 memcpy(buf, nskb->data, nskb->len); 334 tx_buf->len = nskb->len + 4; 335 336 if (i < (tx_skb_cnt - 1)) 337 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 338 339 if (i == (tx_skb_cnt - 1)) 340 tx_buf->len += tx_buf->offset; 341 342 __skb_queue_tail(&tx_buf->skb_queue, nskb); 343 TX_STAT_INC(skb_queued); 344 } 345 346 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 347 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 348 tx_buf->buf, tx_buf->len, 349 hif_usb_tx_cb, tx_buf); 350 351 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 352 if (ret) { 353 tx_buf->len = tx_buf->offset = 0; 354 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 355 __skb_queue_head_init(&tx_buf->skb_queue); 356 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 357 hif_dev->tx.tx_buf_cnt++; 358 } 359 360 if (!ret) 361 TX_STAT_INC(buf_queued); 362 363 return ret; 364 } 365 366 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 367 { 368 struct ath9k_htc_tx_ctl *tx_ctl; 369 unsigned long flags; 370 int ret = 0; 371 372 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 373 374 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 375 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 376 return -ENODEV; 377 } 378 379 /* Check if the max queue count has been reached */ 380 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 381 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 382 return -ENOMEM; 383 } 384 385 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 386 387 tx_ctl = HTC_SKB_CB(skb); 388 389 /* Mgmt/Beacon frames don't use the TX buffer pool */ 390 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 391 (tx_ctl->type == ATH9K_HTC_BEACON)) { 392 ret = hif_usb_send_mgmt(hif_dev, skb); 393 } 394 395 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 396 397 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 398 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 399 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 400 hif_dev->tx.tx_skb_cnt++; 401 } 402 403 /* Check if AMPDUs have to be sent immediately */ 404 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 405 (hif_dev->tx.tx_skb_cnt < 2)) { 406 __hif_usb_tx(hif_dev); 407 } 408 409 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 410 411 return ret; 412 } 413 414 static void hif_usb_start(void *hif_handle) 415 { 416 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 417 unsigned long flags; 418 419 hif_dev->flags |= HIF_USB_START; 420 421 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 422 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 423 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 424 } 425 426 static void hif_usb_stop(void *hif_handle) 427 { 428 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 429 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 430 unsigned long flags; 431 432 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 433 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 434 hif_dev->tx.tx_skb_cnt = 0; 435 hif_dev->tx.flags |= HIF_USB_TX_STOP; 436 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 437 438 /* The pending URBs have to be canceled. */ 439 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 440 &hif_dev->tx.tx_pending, list) { 441 usb_kill_urb(tx_buf->urb); 442 } 443 444 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 445 } 446 447 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 448 { 449 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 450 int ret = 0; 451 452 switch (pipe_id) { 453 case USB_WLAN_TX_PIPE: 454 ret = hif_usb_send_tx(hif_dev, skb); 455 break; 456 case USB_REG_OUT_PIPE: 457 ret = hif_usb_send_regout(hif_dev, skb); 458 break; 459 default: 460 dev_err(&hif_dev->udev->dev, 461 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 462 ret = -EINVAL; 463 break; 464 } 465 466 return ret; 467 } 468 469 static inline bool check_index(struct sk_buff *skb, u8 idx) 470 { 471 struct ath9k_htc_tx_ctl *tx_ctl; 472 473 tx_ctl = HTC_SKB_CB(skb); 474 475 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 476 (tx_ctl->sta_idx == idx)) 477 return true; 478 479 return false; 480 } 481 482 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 483 { 484 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 485 struct sk_buff *skb, *tmp; 486 unsigned long flags; 487 488 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 489 490 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 491 if (check_index(skb, idx)) { 492 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 493 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 494 skb, false); 495 hif_dev->tx.tx_skb_cnt--; 496 TX_STAT_INC(skb_failed); 497 } 498 } 499 500 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 501 } 502 503 static struct ath9k_htc_hif hif_usb = { 504 .transport = ATH9K_HIF_USB, 505 .name = "ath9k_hif_usb", 506 507 .control_ul_pipe = USB_REG_OUT_PIPE, 508 .control_dl_pipe = USB_REG_IN_PIPE, 509 510 .start = hif_usb_start, 511 .stop = hif_usb_stop, 512 .sta_drain = hif_usb_sta_drain, 513 .send = hif_usb_send, 514 }; 515 516 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 517 struct sk_buff *skb) 518 { 519 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 520 int index = 0, i = 0, len = skb->len; 521 int rx_remain_len, rx_pkt_len; 522 u16 pool_index = 0; 523 u8 *ptr; 524 525 spin_lock(&hif_dev->rx_lock); 526 527 rx_remain_len = hif_dev->rx_remain_len; 528 rx_pkt_len = hif_dev->rx_transfer_len; 529 530 if (rx_remain_len != 0) { 531 struct sk_buff *remain_skb = hif_dev->remain_skb; 532 533 if (remain_skb) { 534 ptr = (u8 *) remain_skb->data; 535 536 index = rx_remain_len; 537 rx_remain_len -= hif_dev->rx_pad_len; 538 ptr += rx_pkt_len; 539 540 memcpy(ptr, skb->data, rx_remain_len); 541 542 rx_pkt_len += rx_remain_len; 543 hif_dev->rx_remain_len = 0; 544 skb_put(remain_skb, rx_pkt_len); 545 546 skb_pool[pool_index++] = remain_skb; 547 548 } else { 549 index = rx_remain_len; 550 } 551 } 552 553 spin_unlock(&hif_dev->rx_lock); 554 555 while (index < len) { 556 u16 pkt_len; 557 u16 pkt_tag; 558 u16 pad_len; 559 int chk_idx; 560 561 ptr = (u8 *) skb->data; 562 563 pkt_len = get_unaligned_le16(ptr + index); 564 pkt_tag = get_unaligned_le16(ptr + index + 2); 565 566 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 567 RX_STAT_INC(skb_dropped); 568 return; 569 } 570 571 pad_len = 4 - (pkt_len & 0x3); 572 if (pad_len == 4) 573 pad_len = 0; 574 575 chk_idx = index; 576 index = index + 4 + pkt_len + pad_len; 577 578 if (index > MAX_RX_BUF_SIZE) { 579 spin_lock(&hif_dev->rx_lock); 580 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 581 hif_dev->rx_transfer_len = 582 MAX_RX_BUF_SIZE - chk_idx - 4; 583 hif_dev->rx_pad_len = pad_len; 584 585 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 586 if (!nskb) { 587 dev_err(&hif_dev->udev->dev, 588 "ath9k_htc: RX memory allocation error\n"); 589 spin_unlock(&hif_dev->rx_lock); 590 goto err; 591 } 592 skb_reserve(nskb, 32); 593 RX_STAT_INC(skb_allocated); 594 595 memcpy(nskb->data, &(skb->data[chk_idx+4]), 596 hif_dev->rx_transfer_len); 597 598 /* Record the buffer pointer */ 599 hif_dev->remain_skb = nskb; 600 spin_unlock(&hif_dev->rx_lock); 601 } else { 602 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 603 if (!nskb) { 604 dev_err(&hif_dev->udev->dev, 605 "ath9k_htc: RX memory allocation error\n"); 606 goto err; 607 } 608 skb_reserve(nskb, 32); 609 RX_STAT_INC(skb_allocated); 610 611 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 612 skb_put(nskb, pkt_len); 613 skb_pool[pool_index++] = nskb; 614 } 615 } 616 617 err: 618 for (i = 0; i < pool_index; i++) { 619 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 620 skb_pool[i]->len, USB_WLAN_RX_PIPE); 621 RX_STAT_INC(skb_completed); 622 } 623 } 624 625 static void ath9k_hif_usb_rx_cb(struct urb *urb) 626 { 627 struct sk_buff *skb = (struct sk_buff *) urb->context; 628 struct hif_device_usb *hif_dev = 629 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 630 int ret; 631 632 if (!skb) 633 return; 634 635 if (!hif_dev) 636 goto free; 637 638 switch (urb->status) { 639 case 0: 640 break; 641 case -ENOENT: 642 case -ECONNRESET: 643 case -ENODEV: 644 case -ESHUTDOWN: 645 goto free; 646 default: 647 goto resubmit; 648 } 649 650 if (likely(urb->actual_length != 0)) { 651 skb_put(skb, urb->actual_length); 652 ath9k_hif_usb_rx_stream(hif_dev, skb); 653 } 654 655 resubmit: 656 skb_reset_tail_pointer(skb); 657 skb_trim(skb, 0); 658 659 usb_anchor_urb(urb, &hif_dev->rx_submitted); 660 ret = usb_submit_urb(urb, GFP_ATOMIC); 661 if (ret) { 662 usb_unanchor_urb(urb); 663 goto free; 664 } 665 666 return; 667 free: 668 kfree_skb(skb); 669 } 670 671 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 672 { 673 struct sk_buff *skb = (struct sk_buff *) urb->context; 674 struct sk_buff *nskb; 675 struct hif_device_usb *hif_dev = 676 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 677 int ret; 678 679 if (!skb) 680 return; 681 682 if (!hif_dev) 683 goto free; 684 685 switch (urb->status) { 686 case 0: 687 break; 688 case -ENOENT: 689 case -ECONNRESET: 690 case -ENODEV: 691 case -ESHUTDOWN: 692 goto free; 693 default: 694 skb_reset_tail_pointer(skb); 695 skb_trim(skb, 0); 696 697 goto resubmit; 698 } 699 700 if (likely(urb->actual_length != 0)) { 701 skb_put(skb, urb->actual_length); 702 703 /* Process the command first */ 704 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 705 skb->len, USB_REG_IN_PIPE); 706 707 708 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 709 if (!nskb) { 710 dev_err(&hif_dev->udev->dev, 711 "ath9k_htc: REG_IN memory allocation failure\n"); 712 urb->context = NULL; 713 return; 714 } 715 716 usb_fill_bulk_urb(urb, hif_dev->udev, 717 usb_rcvbulkpipe(hif_dev->udev, 718 USB_REG_IN_PIPE), 719 nskb->data, MAX_REG_IN_BUF_SIZE, 720 ath9k_hif_usb_reg_in_cb, nskb); 721 } 722 723 resubmit: 724 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 725 ret = usb_submit_urb(urb, GFP_ATOMIC); 726 if (ret) { 727 usb_unanchor_urb(urb); 728 goto free; 729 } 730 731 return; 732 free: 733 kfree_skb(skb); 734 urb->context = NULL; 735 } 736 737 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 738 { 739 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 740 unsigned long flags; 741 742 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 743 &hif_dev->tx.tx_buf, list) { 744 usb_kill_urb(tx_buf->urb); 745 list_del(&tx_buf->list); 746 usb_free_urb(tx_buf->urb); 747 kfree(tx_buf->buf); 748 kfree(tx_buf); 749 } 750 751 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 752 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 753 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 754 755 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 756 &hif_dev->tx.tx_pending, list) { 757 usb_kill_urb(tx_buf->urb); 758 list_del(&tx_buf->list); 759 usb_free_urb(tx_buf->urb); 760 kfree(tx_buf->buf); 761 kfree(tx_buf); 762 } 763 764 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 765 } 766 767 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 768 { 769 struct tx_buf *tx_buf; 770 int i; 771 772 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 773 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 774 spin_lock_init(&hif_dev->tx.tx_lock); 775 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 776 init_usb_anchor(&hif_dev->mgmt_submitted); 777 778 for (i = 0; i < MAX_TX_URB_NUM; i++) { 779 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 780 if (!tx_buf) 781 goto err; 782 783 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 784 if (!tx_buf->buf) 785 goto err; 786 787 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 788 if (!tx_buf->urb) 789 goto err; 790 791 tx_buf->hif_dev = hif_dev; 792 __skb_queue_head_init(&tx_buf->skb_queue); 793 794 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 795 } 796 797 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 798 799 return 0; 800 err: 801 if (tx_buf) { 802 kfree(tx_buf->buf); 803 kfree(tx_buf); 804 } 805 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 806 return -ENOMEM; 807 } 808 809 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 810 { 811 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 812 } 813 814 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 815 { 816 struct urb *urb = NULL; 817 struct sk_buff *skb = NULL; 818 int i, ret; 819 820 init_usb_anchor(&hif_dev->rx_submitted); 821 spin_lock_init(&hif_dev->rx_lock); 822 823 for (i = 0; i < MAX_RX_URB_NUM; i++) { 824 825 /* Allocate URB */ 826 urb = usb_alloc_urb(0, GFP_KERNEL); 827 if (urb == NULL) { 828 ret = -ENOMEM; 829 goto err_urb; 830 } 831 832 /* Allocate buffer */ 833 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 834 if (!skb) { 835 ret = -ENOMEM; 836 goto err_skb; 837 } 838 839 usb_fill_bulk_urb(urb, hif_dev->udev, 840 usb_rcvbulkpipe(hif_dev->udev, 841 USB_WLAN_RX_PIPE), 842 skb->data, MAX_RX_BUF_SIZE, 843 ath9k_hif_usb_rx_cb, skb); 844 845 /* Anchor URB */ 846 usb_anchor_urb(urb, &hif_dev->rx_submitted); 847 848 /* Submit URB */ 849 ret = usb_submit_urb(urb, GFP_KERNEL); 850 if (ret) { 851 usb_unanchor_urb(urb); 852 goto err_submit; 853 } 854 855 /* 856 * Drop reference count. 857 * This ensures that the URB is freed when killing them. 858 */ 859 usb_free_urb(urb); 860 } 861 862 return 0; 863 864 err_submit: 865 kfree_skb(skb); 866 err_skb: 867 usb_free_urb(urb); 868 err_urb: 869 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 870 return ret; 871 } 872 873 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 874 { 875 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 876 } 877 878 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 879 { 880 struct urb *urb = NULL; 881 struct sk_buff *skb = NULL; 882 int i, ret; 883 884 init_usb_anchor(&hif_dev->reg_in_submitted); 885 886 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 887 888 /* Allocate URB */ 889 urb = usb_alloc_urb(0, GFP_KERNEL); 890 if (urb == NULL) { 891 ret = -ENOMEM; 892 goto err_urb; 893 } 894 895 /* Allocate buffer */ 896 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 897 if (!skb) { 898 ret = -ENOMEM; 899 goto err_skb; 900 } 901 902 usb_fill_bulk_urb(urb, hif_dev->udev, 903 usb_rcvbulkpipe(hif_dev->udev, 904 USB_REG_IN_PIPE), 905 skb->data, MAX_REG_IN_BUF_SIZE, 906 ath9k_hif_usb_reg_in_cb, skb); 907 908 /* Anchor URB */ 909 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 910 911 /* Submit URB */ 912 ret = usb_submit_urb(urb, GFP_KERNEL); 913 if (ret) { 914 usb_unanchor_urb(urb); 915 goto err_submit; 916 } 917 918 /* 919 * Drop reference count. 920 * This ensures that the URB is freed when killing them. 921 */ 922 usb_free_urb(urb); 923 } 924 925 return 0; 926 927 err_submit: 928 kfree_skb(skb); 929 err_skb: 930 usb_free_urb(urb); 931 err_urb: 932 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 933 return ret; 934 } 935 936 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 937 { 938 /* Register Write */ 939 init_usb_anchor(&hif_dev->regout_submitted); 940 941 /* TX */ 942 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 943 goto err; 944 945 /* RX */ 946 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 947 goto err_rx; 948 949 /* Register Read */ 950 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 951 goto err_reg; 952 953 return 0; 954 err_reg: 955 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 956 err_rx: 957 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 958 err: 959 return -ENOMEM; 960 } 961 962 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 963 { 964 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 965 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 966 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 967 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 968 } 969 970 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, 971 u32 drv_info) 972 { 973 int transfer, err; 974 const void *data = hif_dev->firmware->data; 975 size_t len = hif_dev->firmware->size; 976 u32 addr = AR9271_FIRMWARE; 977 u8 *buf = kzalloc(4096, GFP_KERNEL); 978 u32 firm_offset; 979 980 if (!buf) 981 return -ENOMEM; 982 983 while (len) { 984 transfer = min_t(int, len, 4096); 985 memcpy(buf, data, transfer); 986 987 err = usb_control_msg(hif_dev->udev, 988 usb_sndctrlpipe(hif_dev->udev, 0), 989 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 990 addr >> 8, 0, buf, transfer, HZ); 991 if (err < 0) { 992 kfree(buf); 993 return err; 994 } 995 996 len -= transfer; 997 data += transfer; 998 addr += transfer; 999 } 1000 kfree(buf); 1001 1002 if (IS_AR7010_DEVICE(drv_info)) 1003 firm_offset = AR7010_FIRMWARE_TEXT; 1004 else 1005 firm_offset = AR9271_FIRMWARE_TEXT; 1006 1007 /* 1008 * Issue FW download complete command to firmware. 1009 */ 1010 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1011 FIRMWARE_DOWNLOAD_COMP, 1012 0x40 | USB_DIR_OUT, 1013 firm_offset >> 8, 0, NULL, 0, HZ); 1014 if (err) 1015 return -EIO; 1016 1017 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1018 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size); 1019 1020 return 0; 1021 } 1022 1023 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info) 1024 { 1025 int ret, idx; 1026 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0]; 1027 struct usb_endpoint_descriptor *endp; 1028 1029 /* Request firmware */ 1030 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name, 1031 &hif_dev->udev->dev); 1032 if (ret) { 1033 dev_err(&hif_dev->udev->dev, 1034 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name); 1035 goto err_fw_req; 1036 } 1037 1038 /* Download firmware */ 1039 ret = ath9k_hif_usb_download_fw(hif_dev, drv_info); 1040 if (ret) { 1041 dev_err(&hif_dev->udev->dev, 1042 "ath9k_htc: Firmware - %s download failed\n", 1043 hif_dev->fw_name); 1044 goto err_fw_download; 1045 } 1046 1047 /* On downloading the firmware to the target, the USB descriptor of EP4 1048 * is 'patched' to change the type of the endpoint to Bulk. This will 1049 * bring down CPU usage during the scan period. 1050 */ 1051 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) { 1052 endp = &alt->endpoint[idx].desc; 1053 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 1054 == USB_ENDPOINT_XFER_INT) { 1055 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK; 1056 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK; 1057 endp->bInterval = 0; 1058 } 1059 } 1060 1061 /* Alloc URBs */ 1062 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1063 if (ret) { 1064 dev_err(&hif_dev->udev->dev, 1065 "ath9k_htc: Unable to allocate URBs\n"); 1066 goto err_fw_download; 1067 } 1068 1069 return 0; 1070 1071 err_fw_download: 1072 release_firmware(hif_dev->firmware); 1073 err_fw_req: 1074 hif_dev->firmware = NULL; 1075 return ret; 1076 } 1077 1078 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1079 { 1080 ath9k_hif_usb_dealloc_urbs(hif_dev); 1081 if (hif_dev->firmware) 1082 release_firmware(hif_dev->firmware); 1083 } 1084 1085 /* 1086 * An exact copy of the function from zd1211rw. 1087 */ 1088 static int send_eject_command(struct usb_interface *interface) 1089 { 1090 struct usb_device *udev = interface_to_usbdev(interface); 1091 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1092 struct usb_endpoint_descriptor *endpoint; 1093 unsigned char *cmd; 1094 u8 bulk_out_ep; 1095 int r; 1096 1097 /* Find bulk out endpoint */ 1098 for (r = 1; r >= 0; r--) { 1099 endpoint = &iface_desc->endpoint[r].desc; 1100 if (usb_endpoint_dir_out(endpoint) && 1101 usb_endpoint_xfer_bulk(endpoint)) { 1102 bulk_out_ep = endpoint->bEndpointAddress; 1103 break; 1104 } 1105 } 1106 if (r == -1) { 1107 dev_err(&udev->dev, 1108 "ath9k_htc: Could not find bulk out endpoint\n"); 1109 return -ENODEV; 1110 } 1111 1112 cmd = kzalloc(31, GFP_KERNEL); 1113 if (cmd == NULL) 1114 return -ENODEV; 1115 1116 /* USB bulk command block */ 1117 cmd[0] = 0x55; /* bulk command signature */ 1118 cmd[1] = 0x53; /* bulk command signature */ 1119 cmd[2] = 0x42; /* bulk command signature */ 1120 cmd[3] = 0x43; /* bulk command signature */ 1121 cmd[14] = 6; /* command length */ 1122 1123 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1124 cmd[19] = 0x2; /* eject disc */ 1125 1126 dev_info(&udev->dev, "Ejecting storage device...\n"); 1127 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1128 cmd, 31, NULL, 2000); 1129 kfree(cmd); 1130 if (r) 1131 return r; 1132 1133 /* At this point, the device disconnects and reconnects with the real 1134 * ID numbers. */ 1135 1136 usb_set_intfdata(interface, NULL); 1137 return 0; 1138 } 1139 1140 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1141 const struct usb_device_id *id) 1142 { 1143 struct usb_device *udev = interface_to_usbdev(interface); 1144 struct hif_device_usb *hif_dev; 1145 int ret = 0; 1146 1147 if (id->driver_info == STORAGE_DEVICE) 1148 return send_eject_command(interface); 1149 1150 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1151 if (!hif_dev) { 1152 ret = -ENOMEM; 1153 goto err_alloc; 1154 } 1155 1156 usb_get_dev(udev); 1157 hif_dev->udev = udev; 1158 hif_dev->interface = interface; 1159 hif_dev->device_id = id->idProduct; 1160 #ifdef CONFIG_PM 1161 udev->reset_resume = 1; 1162 #endif 1163 usb_set_intfdata(interface, hif_dev); 1164 1165 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1166 &hif_dev->udev->dev); 1167 if (hif_dev->htc_handle == NULL) { 1168 ret = -ENOMEM; 1169 goto err_htc_hw_alloc; 1170 } 1171 1172 /* Find out which firmware to load */ 1173 1174 if (IS_AR7010_DEVICE(id->driver_info)) 1175 hif_dev->fw_name = FIRMWARE_AR7010_1_1; 1176 else 1177 hif_dev->fw_name = FIRMWARE_AR9271; 1178 1179 ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info); 1180 if (ret) { 1181 ret = -EINVAL; 1182 goto err_hif_init_usb; 1183 } 1184 1185 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1186 &interface->dev, hif_dev->device_id, 1187 hif_dev->udev->product, id->driver_info); 1188 if (ret) { 1189 ret = -EINVAL; 1190 goto err_htc_hw_init; 1191 } 1192 1193 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n"); 1194 1195 return 0; 1196 1197 err_htc_hw_init: 1198 ath9k_hif_usb_dev_deinit(hif_dev); 1199 err_hif_init_usb: 1200 ath9k_htc_hw_free(hif_dev->htc_handle); 1201 err_htc_hw_alloc: 1202 usb_set_intfdata(interface, NULL); 1203 kfree(hif_dev); 1204 usb_put_dev(udev); 1205 err_alloc: 1206 return ret; 1207 } 1208 1209 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1210 { 1211 u32 reboot_cmd = 0xffffffff; 1212 void *buf; 1213 int ret; 1214 1215 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1216 if (!buf) 1217 return; 1218 1219 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE), 1220 buf, 4, NULL, HZ); 1221 if (ret) 1222 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1223 1224 kfree(buf); 1225 } 1226 1227 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1228 { 1229 struct usb_device *udev = interface_to_usbdev(interface); 1230 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1231 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1232 1233 if (!hif_dev) 1234 return; 1235 1236 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1237 ath9k_htc_hw_free(hif_dev->htc_handle); 1238 ath9k_hif_usb_dev_deinit(hif_dev); 1239 usb_set_intfdata(interface, NULL); 1240 1241 if (!unplugged && (hif_dev->flags & HIF_USB_START)) 1242 ath9k_hif_usb_reboot(udev); 1243 1244 kfree(hif_dev); 1245 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1246 usb_put_dev(udev); 1247 } 1248 1249 #ifdef CONFIG_PM 1250 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1251 pm_message_t message) 1252 { 1253 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1254 1255 /* 1256 * The device has to be set to FULLSLEEP mode in case no 1257 * interface is up. 1258 */ 1259 if (!(hif_dev->flags & HIF_USB_START)) 1260 ath9k_htc_suspend(hif_dev->htc_handle); 1261 1262 ath9k_hif_usb_dealloc_urbs(hif_dev); 1263 1264 return 0; 1265 } 1266 1267 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1268 { 1269 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1270 struct htc_target *htc_handle = hif_dev->htc_handle; 1271 int ret; 1272 1273 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1274 if (ret) 1275 return ret; 1276 1277 if (hif_dev->firmware) { 1278 ret = ath9k_hif_usb_download_fw(hif_dev, 1279 htc_handle->drv_priv->ah->hw_version.usbdev); 1280 if (ret) 1281 goto fail_resume; 1282 } else { 1283 ath9k_hif_usb_dealloc_urbs(hif_dev); 1284 return -EIO; 1285 } 1286 1287 mdelay(100); 1288 1289 ret = ath9k_htc_resume(htc_handle); 1290 1291 if (ret) 1292 goto fail_resume; 1293 1294 return 0; 1295 1296 fail_resume: 1297 ath9k_hif_usb_dealloc_urbs(hif_dev); 1298 1299 return ret; 1300 } 1301 #endif 1302 1303 static struct usb_driver ath9k_hif_usb_driver = { 1304 .name = KBUILD_MODNAME, 1305 .probe = ath9k_hif_usb_probe, 1306 .disconnect = ath9k_hif_usb_disconnect, 1307 #ifdef CONFIG_PM 1308 .suspend = ath9k_hif_usb_suspend, 1309 .resume = ath9k_hif_usb_resume, 1310 .reset_resume = ath9k_hif_usb_resume, 1311 #endif 1312 .id_table = ath9k_hif_usb_ids, 1313 .soft_unbind = 1, 1314 }; 1315 1316 int ath9k_hif_usb_init(void) 1317 { 1318 return usb_register(&ath9k_hif_usb_driver); 1319 } 1320 1321 void ath9k_hif_usb_exit(void) 1322 { 1323 usb_deregister(&ath9k_hif_usb_driver); 1324 } 1325