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 { USB_DEVICE(0x057c, 0x8403) }, /* AVM FRITZ!WLAN 11N v2 USB */ 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 57 { USB_DEVICE(0x0cf3, 0x20ff), 58 .driver_info = STORAGE_DEVICE }, 59 60 { }, 61 }; 62 63 MODULE_DEVICE_TABLE(usb, ath9k_hif_usb_ids); 64 65 static int __hif_usb_tx(struct hif_device_usb *hif_dev); 66 67 static void hif_usb_regout_cb(struct urb *urb) 68 { 69 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 70 71 switch (urb->status) { 72 case 0: 73 break; 74 case -ENOENT: 75 case -ECONNRESET: 76 case -ENODEV: 77 case -ESHUTDOWN: 78 goto free; 79 default: 80 break; 81 } 82 83 if (cmd) { 84 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 85 cmd->skb, true); 86 kfree(cmd); 87 } 88 89 return; 90 free: 91 kfree_skb(cmd->skb); 92 kfree(cmd); 93 } 94 95 static int hif_usb_send_regout(struct hif_device_usb *hif_dev, 96 struct sk_buff *skb) 97 { 98 struct urb *urb; 99 struct cmd_buf *cmd; 100 int ret = 0; 101 102 urb = usb_alloc_urb(0, GFP_KERNEL); 103 if (urb == NULL) 104 return -ENOMEM; 105 106 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 107 if (cmd == NULL) { 108 usb_free_urb(urb); 109 return -ENOMEM; 110 } 111 112 cmd->skb = skb; 113 cmd->hif_dev = hif_dev; 114 115 usb_fill_bulk_urb(urb, hif_dev->udev, 116 usb_sndbulkpipe(hif_dev->udev, USB_REG_OUT_PIPE), 117 skb->data, skb->len, 118 hif_usb_regout_cb, cmd); 119 120 usb_anchor_urb(urb, &hif_dev->regout_submitted); 121 ret = usb_submit_urb(urb, GFP_KERNEL); 122 if (ret) { 123 usb_unanchor_urb(urb); 124 kfree(cmd); 125 } 126 usb_free_urb(urb); 127 128 return ret; 129 } 130 131 static void hif_usb_mgmt_cb(struct urb *urb) 132 { 133 struct cmd_buf *cmd = (struct cmd_buf *)urb->context; 134 struct hif_device_usb *hif_dev; 135 bool txok = true; 136 137 if (!cmd || !cmd->skb || !cmd->hif_dev) 138 return; 139 140 hif_dev = cmd->hif_dev; 141 142 switch (urb->status) { 143 case 0: 144 break; 145 case -ENOENT: 146 case -ECONNRESET: 147 case -ENODEV: 148 case -ESHUTDOWN: 149 txok = false; 150 151 /* 152 * If the URBs are being flushed, no need to complete 153 * this packet. 154 */ 155 spin_lock(&hif_dev->tx.tx_lock); 156 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 157 spin_unlock(&hif_dev->tx.tx_lock); 158 dev_kfree_skb_any(cmd->skb); 159 kfree(cmd); 160 return; 161 } 162 spin_unlock(&hif_dev->tx.tx_lock); 163 164 break; 165 default: 166 txok = false; 167 break; 168 } 169 170 skb_pull(cmd->skb, 4); 171 ath9k_htc_txcompletion_cb(cmd->hif_dev->htc_handle, 172 cmd->skb, txok); 173 kfree(cmd); 174 } 175 176 static int hif_usb_send_mgmt(struct hif_device_usb *hif_dev, 177 struct sk_buff *skb) 178 { 179 struct urb *urb; 180 struct cmd_buf *cmd; 181 int ret = 0; 182 __le16 *hdr; 183 184 urb = usb_alloc_urb(0, GFP_ATOMIC); 185 if (urb == NULL) 186 return -ENOMEM; 187 188 cmd = kzalloc(sizeof(*cmd), GFP_ATOMIC); 189 if (cmd == NULL) { 190 usb_free_urb(urb); 191 return -ENOMEM; 192 } 193 194 cmd->skb = skb; 195 cmd->hif_dev = hif_dev; 196 197 hdr = (__le16 *) skb_push(skb, 4); 198 *hdr++ = cpu_to_le16(skb->len - 4); 199 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 200 201 usb_fill_bulk_urb(urb, hif_dev->udev, 202 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 203 skb->data, skb->len, 204 hif_usb_mgmt_cb, cmd); 205 206 usb_anchor_urb(urb, &hif_dev->mgmt_submitted); 207 ret = usb_submit_urb(urb, GFP_ATOMIC); 208 if (ret) { 209 usb_unanchor_urb(urb); 210 kfree(cmd); 211 } 212 usb_free_urb(urb); 213 214 return ret; 215 } 216 217 static inline void ath9k_skb_queue_purge(struct hif_device_usb *hif_dev, 218 struct sk_buff_head *list) 219 { 220 struct sk_buff *skb; 221 222 while ((skb = __skb_dequeue(list)) != NULL) { 223 dev_kfree_skb_any(skb); 224 } 225 } 226 227 static inline void ath9k_skb_queue_complete(struct hif_device_usb *hif_dev, 228 struct sk_buff_head *queue, 229 bool txok) 230 { 231 struct sk_buff *skb; 232 233 while ((skb = __skb_dequeue(queue)) != NULL) { 234 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 235 skb, txok); 236 if (txok) 237 TX_STAT_INC(skb_success); 238 else 239 TX_STAT_INC(skb_failed); 240 } 241 } 242 243 static void hif_usb_tx_cb(struct urb *urb) 244 { 245 struct tx_buf *tx_buf = (struct tx_buf *) urb->context; 246 struct hif_device_usb *hif_dev; 247 bool txok = true; 248 249 if (!tx_buf || !tx_buf->hif_dev) 250 return; 251 252 hif_dev = tx_buf->hif_dev; 253 254 switch (urb->status) { 255 case 0: 256 break; 257 case -ENOENT: 258 case -ECONNRESET: 259 case -ENODEV: 260 case -ESHUTDOWN: 261 txok = false; 262 263 /* 264 * If the URBs are being flushed, no need to add this 265 * URB to the free list. 266 */ 267 spin_lock(&hif_dev->tx.tx_lock); 268 if (hif_dev->tx.flags & HIF_USB_TX_FLUSH) { 269 spin_unlock(&hif_dev->tx.tx_lock); 270 ath9k_skb_queue_purge(hif_dev, &tx_buf->skb_queue); 271 return; 272 } 273 spin_unlock(&hif_dev->tx.tx_lock); 274 275 break; 276 default: 277 txok = false; 278 break; 279 } 280 281 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, txok); 282 283 /* Re-initialize the SKB queue */ 284 tx_buf->len = tx_buf->offset = 0; 285 __skb_queue_head_init(&tx_buf->skb_queue); 286 287 /* Add this TX buffer to the free list */ 288 spin_lock(&hif_dev->tx.tx_lock); 289 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 290 hif_dev->tx.tx_buf_cnt++; 291 if (!(hif_dev->tx.flags & HIF_USB_TX_STOP)) 292 __hif_usb_tx(hif_dev); /* Check for pending SKBs */ 293 TX_STAT_INC(buf_completed); 294 spin_unlock(&hif_dev->tx.tx_lock); 295 } 296 297 /* TX lock has to be taken */ 298 static int __hif_usb_tx(struct hif_device_usb *hif_dev) 299 { 300 struct tx_buf *tx_buf = NULL; 301 struct sk_buff *nskb = NULL; 302 int ret = 0, i; 303 u16 tx_skb_cnt = 0; 304 u8 *buf; 305 __le16 *hdr; 306 307 if (hif_dev->tx.tx_skb_cnt == 0) 308 return 0; 309 310 /* Check if a free TX buffer is available */ 311 if (list_empty(&hif_dev->tx.tx_buf)) 312 return 0; 313 314 tx_buf = list_first_entry(&hif_dev->tx.tx_buf, struct tx_buf, list); 315 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_pending); 316 hif_dev->tx.tx_buf_cnt--; 317 318 tx_skb_cnt = min_t(u16, hif_dev->tx.tx_skb_cnt, MAX_TX_AGGR_NUM); 319 320 for (i = 0; i < tx_skb_cnt; i++) { 321 nskb = __skb_dequeue(&hif_dev->tx.tx_skb_queue); 322 323 /* Should never be NULL */ 324 BUG_ON(!nskb); 325 326 hif_dev->tx.tx_skb_cnt--; 327 328 buf = tx_buf->buf; 329 buf += tx_buf->offset; 330 hdr = (__le16 *)buf; 331 *hdr++ = cpu_to_le16(nskb->len); 332 *hdr++ = cpu_to_le16(ATH_USB_TX_STREAM_MODE_TAG); 333 buf += 4; 334 memcpy(buf, nskb->data, nskb->len); 335 tx_buf->len = nskb->len + 4; 336 337 if (i < (tx_skb_cnt - 1)) 338 tx_buf->offset += (((tx_buf->len - 1) / 4) + 1) * 4; 339 340 if (i == (tx_skb_cnt - 1)) 341 tx_buf->len += tx_buf->offset; 342 343 __skb_queue_tail(&tx_buf->skb_queue, nskb); 344 TX_STAT_INC(skb_queued); 345 } 346 347 usb_fill_bulk_urb(tx_buf->urb, hif_dev->udev, 348 usb_sndbulkpipe(hif_dev->udev, USB_WLAN_TX_PIPE), 349 tx_buf->buf, tx_buf->len, 350 hif_usb_tx_cb, tx_buf); 351 352 ret = usb_submit_urb(tx_buf->urb, GFP_ATOMIC); 353 if (ret) { 354 tx_buf->len = tx_buf->offset = 0; 355 ath9k_skb_queue_complete(hif_dev, &tx_buf->skb_queue, false); 356 __skb_queue_head_init(&tx_buf->skb_queue); 357 list_move_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 358 hif_dev->tx.tx_buf_cnt++; 359 } 360 361 if (!ret) 362 TX_STAT_INC(buf_queued); 363 364 return ret; 365 } 366 367 static int hif_usb_send_tx(struct hif_device_usb *hif_dev, struct sk_buff *skb) 368 { 369 struct ath9k_htc_tx_ctl *tx_ctl; 370 unsigned long flags; 371 int ret = 0; 372 373 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 374 375 if (hif_dev->tx.flags & HIF_USB_TX_STOP) { 376 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 377 return -ENODEV; 378 } 379 380 /* Check if the max queue count has been reached */ 381 if (hif_dev->tx.tx_skb_cnt > MAX_TX_BUF_NUM) { 382 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 383 return -ENOMEM; 384 } 385 386 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 387 388 tx_ctl = HTC_SKB_CB(skb); 389 390 /* Mgmt/Beacon frames don't use the TX buffer pool */ 391 if ((tx_ctl->type == ATH9K_HTC_MGMT) || 392 (tx_ctl->type == ATH9K_HTC_BEACON)) { 393 ret = hif_usb_send_mgmt(hif_dev, skb); 394 } 395 396 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 397 398 if ((tx_ctl->type == ATH9K_HTC_NORMAL) || 399 (tx_ctl->type == ATH9K_HTC_AMPDU)) { 400 __skb_queue_tail(&hif_dev->tx.tx_skb_queue, skb); 401 hif_dev->tx.tx_skb_cnt++; 402 } 403 404 /* Check if AMPDUs have to be sent immediately */ 405 if ((hif_dev->tx.tx_buf_cnt == MAX_TX_URB_NUM) && 406 (hif_dev->tx.tx_skb_cnt < 2)) { 407 __hif_usb_tx(hif_dev); 408 } 409 410 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 411 412 return ret; 413 } 414 415 static void hif_usb_start(void *hif_handle) 416 { 417 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 418 unsigned long flags; 419 420 hif_dev->flags |= HIF_USB_START; 421 422 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 423 hif_dev->tx.flags &= ~HIF_USB_TX_STOP; 424 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 425 } 426 427 static void hif_usb_stop(void *hif_handle) 428 { 429 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 430 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 431 unsigned long flags; 432 433 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 434 ath9k_skb_queue_complete(hif_dev, &hif_dev->tx.tx_skb_queue, false); 435 hif_dev->tx.tx_skb_cnt = 0; 436 hif_dev->tx.flags |= HIF_USB_TX_STOP; 437 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 438 439 /* The pending URBs have to be canceled. */ 440 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 441 &hif_dev->tx.tx_pending, list) { 442 usb_kill_urb(tx_buf->urb); 443 } 444 445 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 446 } 447 448 static int hif_usb_send(void *hif_handle, u8 pipe_id, struct sk_buff *skb) 449 { 450 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 451 int ret = 0; 452 453 switch (pipe_id) { 454 case USB_WLAN_TX_PIPE: 455 ret = hif_usb_send_tx(hif_dev, skb); 456 break; 457 case USB_REG_OUT_PIPE: 458 ret = hif_usb_send_regout(hif_dev, skb); 459 break; 460 default: 461 dev_err(&hif_dev->udev->dev, 462 "ath9k_htc: Invalid TX pipe: %d\n", pipe_id); 463 ret = -EINVAL; 464 break; 465 } 466 467 return ret; 468 } 469 470 static inline bool check_index(struct sk_buff *skb, u8 idx) 471 { 472 struct ath9k_htc_tx_ctl *tx_ctl; 473 474 tx_ctl = HTC_SKB_CB(skb); 475 476 if ((tx_ctl->type == ATH9K_HTC_AMPDU) && 477 (tx_ctl->sta_idx == idx)) 478 return true; 479 480 return false; 481 } 482 483 static void hif_usb_sta_drain(void *hif_handle, u8 idx) 484 { 485 struct hif_device_usb *hif_dev = (struct hif_device_usb *)hif_handle; 486 struct sk_buff *skb, *tmp; 487 unsigned long flags; 488 489 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 490 491 skb_queue_walk_safe(&hif_dev->tx.tx_skb_queue, skb, tmp) { 492 if (check_index(skb, idx)) { 493 __skb_unlink(skb, &hif_dev->tx.tx_skb_queue); 494 ath9k_htc_txcompletion_cb(hif_dev->htc_handle, 495 skb, false); 496 hif_dev->tx.tx_skb_cnt--; 497 TX_STAT_INC(skb_failed); 498 } 499 } 500 501 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 502 } 503 504 static struct ath9k_htc_hif hif_usb = { 505 .transport = ATH9K_HIF_USB, 506 .name = "ath9k_hif_usb", 507 508 .control_ul_pipe = USB_REG_OUT_PIPE, 509 .control_dl_pipe = USB_REG_IN_PIPE, 510 511 .start = hif_usb_start, 512 .stop = hif_usb_stop, 513 .sta_drain = hif_usb_sta_drain, 514 .send = hif_usb_send, 515 }; 516 517 static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev, 518 struct sk_buff *skb) 519 { 520 struct sk_buff *nskb, *skb_pool[MAX_PKT_NUM_IN_TRANSFER]; 521 int index = 0, i = 0, len = skb->len; 522 int rx_remain_len, rx_pkt_len; 523 u16 pool_index = 0; 524 u8 *ptr; 525 526 spin_lock(&hif_dev->rx_lock); 527 528 rx_remain_len = hif_dev->rx_remain_len; 529 rx_pkt_len = hif_dev->rx_transfer_len; 530 531 if (rx_remain_len != 0) { 532 struct sk_buff *remain_skb = hif_dev->remain_skb; 533 534 if (remain_skb) { 535 ptr = (u8 *) remain_skb->data; 536 537 index = rx_remain_len; 538 rx_remain_len -= hif_dev->rx_pad_len; 539 ptr += rx_pkt_len; 540 541 memcpy(ptr, skb->data, rx_remain_len); 542 543 rx_pkt_len += rx_remain_len; 544 hif_dev->rx_remain_len = 0; 545 skb_put(remain_skb, rx_pkt_len); 546 547 skb_pool[pool_index++] = remain_skb; 548 549 } else { 550 index = rx_remain_len; 551 } 552 } 553 554 spin_unlock(&hif_dev->rx_lock); 555 556 while (index < len) { 557 u16 pkt_len; 558 u16 pkt_tag; 559 u16 pad_len; 560 int chk_idx; 561 562 ptr = (u8 *) skb->data; 563 564 pkt_len = get_unaligned_le16(ptr + index); 565 pkt_tag = get_unaligned_le16(ptr + index + 2); 566 567 if (pkt_tag != ATH_USB_RX_STREAM_MODE_TAG) { 568 RX_STAT_INC(skb_dropped); 569 return; 570 } 571 572 pad_len = 4 - (pkt_len & 0x3); 573 if (pad_len == 4) 574 pad_len = 0; 575 576 chk_idx = index; 577 index = index + 4 + pkt_len + pad_len; 578 579 if (index > MAX_RX_BUF_SIZE) { 580 spin_lock(&hif_dev->rx_lock); 581 hif_dev->rx_remain_len = index - MAX_RX_BUF_SIZE; 582 hif_dev->rx_transfer_len = 583 MAX_RX_BUF_SIZE - chk_idx - 4; 584 hif_dev->rx_pad_len = pad_len; 585 586 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 587 if (!nskb) { 588 dev_err(&hif_dev->udev->dev, 589 "ath9k_htc: RX memory allocation error\n"); 590 spin_unlock(&hif_dev->rx_lock); 591 goto err; 592 } 593 skb_reserve(nskb, 32); 594 RX_STAT_INC(skb_allocated); 595 596 memcpy(nskb->data, &(skb->data[chk_idx+4]), 597 hif_dev->rx_transfer_len); 598 599 /* Record the buffer pointer */ 600 hif_dev->remain_skb = nskb; 601 spin_unlock(&hif_dev->rx_lock); 602 } else { 603 nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC); 604 if (!nskb) { 605 dev_err(&hif_dev->udev->dev, 606 "ath9k_htc: RX memory allocation error\n"); 607 goto err; 608 } 609 skb_reserve(nskb, 32); 610 RX_STAT_INC(skb_allocated); 611 612 memcpy(nskb->data, &(skb->data[chk_idx+4]), pkt_len); 613 skb_put(nskb, pkt_len); 614 skb_pool[pool_index++] = nskb; 615 } 616 } 617 618 err: 619 for (i = 0; i < pool_index; i++) { 620 ath9k_htc_rx_msg(hif_dev->htc_handle, skb_pool[i], 621 skb_pool[i]->len, USB_WLAN_RX_PIPE); 622 RX_STAT_INC(skb_completed); 623 } 624 } 625 626 static void ath9k_hif_usb_rx_cb(struct urb *urb) 627 { 628 struct sk_buff *skb = (struct sk_buff *) urb->context; 629 struct hif_device_usb *hif_dev = 630 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 631 int ret; 632 633 if (!skb) 634 return; 635 636 if (!hif_dev) 637 goto free; 638 639 switch (urb->status) { 640 case 0: 641 break; 642 case -ENOENT: 643 case -ECONNRESET: 644 case -ENODEV: 645 case -ESHUTDOWN: 646 goto free; 647 default: 648 goto resubmit; 649 } 650 651 if (likely(urb->actual_length != 0)) { 652 skb_put(skb, urb->actual_length); 653 ath9k_hif_usb_rx_stream(hif_dev, skb); 654 } 655 656 resubmit: 657 skb_reset_tail_pointer(skb); 658 skb_trim(skb, 0); 659 660 usb_anchor_urb(urb, &hif_dev->rx_submitted); 661 ret = usb_submit_urb(urb, GFP_ATOMIC); 662 if (ret) { 663 usb_unanchor_urb(urb); 664 goto free; 665 } 666 667 return; 668 free: 669 kfree_skb(skb); 670 } 671 672 static void ath9k_hif_usb_reg_in_cb(struct urb *urb) 673 { 674 struct sk_buff *skb = (struct sk_buff *) urb->context; 675 struct sk_buff *nskb; 676 struct hif_device_usb *hif_dev = 677 usb_get_intfdata(usb_ifnum_to_if(urb->dev, 0)); 678 int ret; 679 680 if (!skb) 681 return; 682 683 if (!hif_dev) 684 goto free; 685 686 switch (urb->status) { 687 case 0: 688 break; 689 case -ENOENT: 690 case -ECONNRESET: 691 case -ENODEV: 692 case -ESHUTDOWN: 693 goto free; 694 default: 695 skb_reset_tail_pointer(skb); 696 skb_trim(skb, 0); 697 698 goto resubmit; 699 } 700 701 if (likely(urb->actual_length != 0)) { 702 skb_put(skb, urb->actual_length); 703 704 /* Process the command first */ 705 ath9k_htc_rx_msg(hif_dev->htc_handle, skb, 706 skb->len, USB_REG_IN_PIPE); 707 708 709 nskb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_ATOMIC); 710 if (!nskb) { 711 dev_err(&hif_dev->udev->dev, 712 "ath9k_htc: REG_IN memory allocation failure\n"); 713 urb->context = NULL; 714 return; 715 } 716 717 usb_fill_bulk_urb(urb, hif_dev->udev, 718 usb_rcvbulkpipe(hif_dev->udev, 719 USB_REG_IN_PIPE), 720 nskb->data, MAX_REG_IN_BUF_SIZE, 721 ath9k_hif_usb_reg_in_cb, nskb); 722 } 723 724 resubmit: 725 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 726 ret = usb_submit_urb(urb, GFP_ATOMIC); 727 if (ret) { 728 usb_unanchor_urb(urb); 729 goto free; 730 } 731 732 return; 733 free: 734 kfree_skb(skb); 735 urb->context = NULL; 736 } 737 738 static void ath9k_hif_usb_dealloc_tx_urbs(struct hif_device_usb *hif_dev) 739 { 740 struct tx_buf *tx_buf = NULL, *tx_buf_tmp = NULL; 741 unsigned long flags; 742 743 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 744 &hif_dev->tx.tx_buf, list) { 745 usb_kill_urb(tx_buf->urb); 746 list_del(&tx_buf->list); 747 usb_free_urb(tx_buf->urb); 748 kfree(tx_buf->buf); 749 kfree(tx_buf); 750 } 751 752 spin_lock_irqsave(&hif_dev->tx.tx_lock, flags); 753 hif_dev->tx.flags |= HIF_USB_TX_FLUSH; 754 spin_unlock_irqrestore(&hif_dev->tx.tx_lock, flags); 755 756 list_for_each_entry_safe(tx_buf, tx_buf_tmp, 757 &hif_dev->tx.tx_pending, list) { 758 usb_kill_urb(tx_buf->urb); 759 list_del(&tx_buf->list); 760 usb_free_urb(tx_buf->urb); 761 kfree(tx_buf->buf); 762 kfree(tx_buf); 763 } 764 765 usb_kill_anchored_urbs(&hif_dev->mgmt_submitted); 766 } 767 768 static int ath9k_hif_usb_alloc_tx_urbs(struct hif_device_usb *hif_dev) 769 { 770 struct tx_buf *tx_buf; 771 int i; 772 773 INIT_LIST_HEAD(&hif_dev->tx.tx_buf); 774 INIT_LIST_HEAD(&hif_dev->tx.tx_pending); 775 spin_lock_init(&hif_dev->tx.tx_lock); 776 __skb_queue_head_init(&hif_dev->tx.tx_skb_queue); 777 init_usb_anchor(&hif_dev->mgmt_submitted); 778 779 for (i = 0; i < MAX_TX_URB_NUM; i++) { 780 tx_buf = kzalloc(sizeof(struct tx_buf), GFP_KERNEL); 781 if (!tx_buf) 782 goto err; 783 784 tx_buf->buf = kzalloc(MAX_TX_BUF_SIZE, GFP_KERNEL); 785 if (!tx_buf->buf) 786 goto err; 787 788 tx_buf->urb = usb_alloc_urb(0, GFP_KERNEL); 789 if (!tx_buf->urb) 790 goto err; 791 792 tx_buf->hif_dev = hif_dev; 793 __skb_queue_head_init(&tx_buf->skb_queue); 794 795 list_add_tail(&tx_buf->list, &hif_dev->tx.tx_buf); 796 } 797 798 hif_dev->tx.tx_buf_cnt = MAX_TX_URB_NUM; 799 800 return 0; 801 err: 802 if (tx_buf) { 803 kfree(tx_buf->buf); 804 kfree(tx_buf); 805 } 806 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 807 return -ENOMEM; 808 } 809 810 static void ath9k_hif_usb_dealloc_rx_urbs(struct hif_device_usb *hif_dev) 811 { 812 usb_kill_anchored_urbs(&hif_dev->rx_submitted); 813 } 814 815 static int ath9k_hif_usb_alloc_rx_urbs(struct hif_device_usb *hif_dev) 816 { 817 struct urb *urb = NULL; 818 struct sk_buff *skb = NULL; 819 int i, ret; 820 821 init_usb_anchor(&hif_dev->rx_submitted); 822 spin_lock_init(&hif_dev->rx_lock); 823 824 for (i = 0; i < MAX_RX_URB_NUM; i++) { 825 826 /* Allocate URB */ 827 urb = usb_alloc_urb(0, GFP_KERNEL); 828 if (urb == NULL) { 829 ret = -ENOMEM; 830 goto err_urb; 831 } 832 833 /* Allocate buffer */ 834 skb = alloc_skb(MAX_RX_BUF_SIZE, GFP_KERNEL); 835 if (!skb) { 836 ret = -ENOMEM; 837 goto err_skb; 838 } 839 840 usb_fill_bulk_urb(urb, hif_dev->udev, 841 usb_rcvbulkpipe(hif_dev->udev, 842 USB_WLAN_RX_PIPE), 843 skb->data, MAX_RX_BUF_SIZE, 844 ath9k_hif_usb_rx_cb, skb); 845 846 /* Anchor URB */ 847 usb_anchor_urb(urb, &hif_dev->rx_submitted); 848 849 /* Submit URB */ 850 ret = usb_submit_urb(urb, GFP_KERNEL); 851 if (ret) { 852 usb_unanchor_urb(urb); 853 goto err_submit; 854 } 855 856 /* 857 * Drop reference count. 858 * This ensures that the URB is freed when killing them. 859 */ 860 usb_free_urb(urb); 861 } 862 863 return 0; 864 865 err_submit: 866 kfree_skb(skb); 867 err_skb: 868 usb_free_urb(urb); 869 err_urb: 870 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 871 return ret; 872 } 873 874 static void ath9k_hif_usb_dealloc_reg_in_urbs(struct hif_device_usb *hif_dev) 875 { 876 usb_kill_anchored_urbs(&hif_dev->reg_in_submitted); 877 } 878 879 static int ath9k_hif_usb_alloc_reg_in_urbs(struct hif_device_usb *hif_dev) 880 { 881 struct urb *urb = NULL; 882 struct sk_buff *skb = NULL; 883 int i, ret; 884 885 init_usb_anchor(&hif_dev->reg_in_submitted); 886 887 for (i = 0; i < MAX_REG_IN_URB_NUM; i++) { 888 889 /* Allocate URB */ 890 urb = usb_alloc_urb(0, GFP_KERNEL); 891 if (urb == NULL) { 892 ret = -ENOMEM; 893 goto err_urb; 894 } 895 896 /* Allocate buffer */ 897 skb = alloc_skb(MAX_REG_IN_BUF_SIZE, GFP_KERNEL); 898 if (!skb) { 899 ret = -ENOMEM; 900 goto err_skb; 901 } 902 903 usb_fill_bulk_urb(urb, hif_dev->udev, 904 usb_rcvbulkpipe(hif_dev->udev, 905 USB_REG_IN_PIPE), 906 skb->data, MAX_REG_IN_BUF_SIZE, 907 ath9k_hif_usb_reg_in_cb, skb); 908 909 /* Anchor URB */ 910 usb_anchor_urb(urb, &hif_dev->reg_in_submitted); 911 912 /* Submit URB */ 913 ret = usb_submit_urb(urb, GFP_KERNEL); 914 if (ret) { 915 usb_unanchor_urb(urb); 916 goto err_submit; 917 } 918 919 /* 920 * Drop reference count. 921 * This ensures that the URB is freed when killing them. 922 */ 923 usb_free_urb(urb); 924 } 925 926 return 0; 927 928 err_submit: 929 kfree_skb(skb); 930 err_skb: 931 usb_free_urb(urb); 932 err_urb: 933 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 934 return ret; 935 } 936 937 static int ath9k_hif_usb_alloc_urbs(struct hif_device_usb *hif_dev) 938 { 939 /* Register Write */ 940 init_usb_anchor(&hif_dev->regout_submitted); 941 942 /* TX */ 943 if (ath9k_hif_usb_alloc_tx_urbs(hif_dev) < 0) 944 goto err; 945 946 /* RX */ 947 if (ath9k_hif_usb_alloc_rx_urbs(hif_dev) < 0) 948 goto err_rx; 949 950 /* Register Read */ 951 if (ath9k_hif_usb_alloc_reg_in_urbs(hif_dev) < 0) 952 goto err_reg; 953 954 return 0; 955 err_reg: 956 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 957 err_rx: 958 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 959 err: 960 return -ENOMEM; 961 } 962 963 static void ath9k_hif_usb_dealloc_urbs(struct hif_device_usb *hif_dev) 964 { 965 usb_kill_anchored_urbs(&hif_dev->regout_submitted); 966 ath9k_hif_usb_dealloc_reg_in_urbs(hif_dev); 967 ath9k_hif_usb_dealloc_tx_urbs(hif_dev); 968 ath9k_hif_usb_dealloc_rx_urbs(hif_dev); 969 } 970 971 static int ath9k_hif_usb_download_fw(struct hif_device_usb *hif_dev, 972 u32 drv_info) 973 { 974 int transfer, err; 975 const void *data = hif_dev->firmware->data; 976 size_t len = hif_dev->firmware->size; 977 u32 addr = AR9271_FIRMWARE; 978 u8 *buf = kzalloc(4096, GFP_KERNEL); 979 u32 firm_offset; 980 981 if (!buf) 982 return -ENOMEM; 983 984 while (len) { 985 transfer = min_t(int, len, 4096); 986 memcpy(buf, data, transfer); 987 988 err = usb_control_msg(hif_dev->udev, 989 usb_sndctrlpipe(hif_dev->udev, 0), 990 FIRMWARE_DOWNLOAD, 0x40 | USB_DIR_OUT, 991 addr >> 8, 0, buf, transfer, HZ); 992 if (err < 0) { 993 kfree(buf); 994 return err; 995 } 996 997 len -= transfer; 998 data += transfer; 999 addr += transfer; 1000 } 1001 kfree(buf); 1002 1003 if (IS_AR7010_DEVICE(drv_info)) 1004 firm_offset = AR7010_FIRMWARE_TEXT; 1005 else 1006 firm_offset = AR9271_FIRMWARE_TEXT; 1007 1008 /* 1009 * Issue FW download complete command to firmware. 1010 */ 1011 err = usb_control_msg(hif_dev->udev, usb_sndctrlpipe(hif_dev->udev, 0), 1012 FIRMWARE_DOWNLOAD_COMP, 1013 0x40 | USB_DIR_OUT, 1014 firm_offset >> 8, 0, NULL, 0, HZ); 1015 if (err) 1016 return -EIO; 1017 1018 dev_info(&hif_dev->udev->dev, "ath9k_htc: Transferred FW: %s, size: %ld\n", 1019 hif_dev->fw_name, (unsigned long) hif_dev->firmware->size); 1020 1021 return 0; 1022 } 1023 1024 static int ath9k_hif_usb_dev_init(struct hif_device_usb *hif_dev, u32 drv_info) 1025 { 1026 int ret, idx; 1027 struct usb_host_interface *alt = &hif_dev->interface->altsetting[0]; 1028 struct usb_endpoint_descriptor *endp; 1029 1030 /* Request firmware */ 1031 ret = request_firmware(&hif_dev->firmware, hif_dev->fw_name, 1032 &hif_dev->udev->dev); 1033 if (ret) { 1034 dev_err(&hif_dev->udev->dev, 1035 "ath9k_htc: Firmware - %s not found\n", hif_dev->fw_name); 1036 goto err_fw_req; 1037 } 1038 1039 /* Download firmware */ 1040 ret = ath9k_hif_usb_download_fw(hif_dev, drv_info); 1041 if (ret) { 1042 dev_err(&hif_dev->udev->dev, 1043 "ath9k_htc: Firmware - %s download failed\n", 1044 hif_dev->fw_name); 1045 goto err_fw_download; 1046 } 1047 1048 /* On downloading the firmware to the target, the USB descriptor of EP4 1049 * is 'patched' to change the type of the endpoint to Bulk. This will 1050 * bring down CPU usage during the scan period. 1051 */ 1052 for (idx = 0; idx < alt->desc.bNumEndpoints; idx++) { 1053 endp = &alt->endpoint[idx].desc; 1054 if ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) 1055 == USB_ENDPOINT_XFER_INT) { 1056 endp->bmAttributes &= ~USB_ENDPOINT_XFERTYPE_MASK; 1057 endp->bmAttributes |= USB_ENDPOINT_XFER_BULK; 1058 endp->bInterval = 0; 1059 } 1060 } 1061 1062 /* Alloc URBs */ 1063 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1064 if (ret) { 1065 dev_err(&hif_dev->udev->dev, 1066 "ath9k_htc: Unable to allocate URBs\n"); 1067 goto err_fw_download; 1068 } 1069 1070 return 0; 1071 1072 err_fw_download: 1073 release_firmware(hif_dev->firmware); 1074 err_fw_req: 1075 hif_dev->firmware = NULL; 1076 return ret; 1077 } 1078 1079 static void ath9k_hif_usb_dev_deinit(struct hif_device_usb *hif_dev) 1080 { 1081 ath9k_hif_usb_dealloc_urbs(hif_dev); 1082 if (hif_dev->firmware) 1083 release_firmware(hif_dev->firmware); 1084 } 1085 1086 /* 1087 * An exact copy of the function from zd1211rw. 1088 */ 1089 static int send_eject_command(struct usb_interface *interface) 1090 { 1091 struct usb_device *udev = interface_to_usbdev(interface); 1092 struct usb_host_interface *iface_desc = &interface->altsetting[0]; 1093 struct usb_endpoint_descriptor *endpoint; 1094 unsigned char *cmd; 1095 u8 bulk_out_ep; 1096 int r; 1097 1098 /* Find bulk out endpoint */ 1099 for (r = 1; r >= 0; r--) { 1100 endpoint = &iface_desc->endpoint[r].desc; 1101 if (usb_endpoint_dir_out(endpoint) && 1102 usb_endpoint_xfer_bulk(endpoint)) { 1103 bulk_out_ep = endpoint->bEndpointAddress; 1104 break; 1105 } 1106 } 1107 if (r == -1) { 1108 dev_err(&udev->dev, 1109 "ath9k_htc: Could not find bulk out endpoint\n"); 1110 return -ENODEV; 1111 } 1112 1113 cmd = kzalloc(31, GFP_KERNEL); 1114 if (cmd == NULL) 1115 return -ENODEV; 1116 1117 /* USB bulk command block */ 1118 cmd[0] = 0x55; /* bulk command signature */ 1119 cmd[1] = 0x53; /* bulk command signature */ 1120 cmd[2] = 0x42; /* bulk command signature */ 1121 cmd[3] = 0x43; /* bulk command signature */ 1122 cmd[14] = 6; /* command length */ 1123 1124 cmd[15] = 0x1b; /* SCSI command: START STOP UNIT */ 1125 cmd[19] = 0x2; /* eject disc */ 1126 1127 dev_info(&udev->dev, "Ejecting storage device...\n"); 1128 r = usb_bulk_msg(udev, usb_sndbulkpipe(udev, bulk_out_ep), 1129 cmd, 31, NULL, 2000); 1130 kfree(cmd); 1131 if (r) 1132 return r; 1133 1134 /* At this point, the device disconnects and reconnects with the real 1135 * ID numbers. */ 1136 1137 usb_set_intfdata(interface, NULL); 1138 return 0; 1139 } 1140 1141 static int ath9k_hif_usb_probe(struct usb_interface *interface, 1142 const struct usb_device_id *id) 1143 { 1144 struct usb_device *udev = interface_to_usbdev(interface); 1145 struct hif_device_usb *hif_dev; 1146 int ret = 0; 1147 1148 if (id->driver_info == STORAGE_DEVICE) 1149 return send_eject_command(interface); 1150 1151 hif_dev = kzalloc(sizeof(struct hif_device_usb), GFP_KERNEL); 1152 if (!hif_dev) { 1153 ret = -ENOMEM; 1154 goto err_alloc; 1155 } 1156 1157 usb_get_dev(udev); 1158 hif_dev->udev = udev; 1159 hif_dev->interface = interface; 1160 hif_dev->device_id = id->idProduct; 1161 #ifdef CONFIG_PM 1162 udev->reset_resume = 1; 1163 #endif 1164 usb_set_intfdata(interface, hif_dev); 1165 1166 hif_dev->htc_handle = ath9k_htc_hw_alloc(hif_dev, &hif_usb, 1167 &hif_dev->udev->dev); 1168 if (hif_dev->htc_handle == NULL) { 1169 ret = -ENOMEM; 1170 goto err_htc_hw_alloc; 1171 } 1172 1173 /* Find out which firmware to load */ 1174 1175 if (IS_AR7010_DEVICE(id->driver_info)) 1176 hif_dev->fw_name = FIRMWARE_AR7010_1_1; 1177 else 1178 hif_dev->fw_name = FIRMWARE_AR9271; 1179 1180 ret = ath9k_hif_usb_dev_init(hif_dev, id->driver_info); 1181 if (ret) { 1182 ret = -EINVAL; 1183 goto err_hif_init_usb; 1184 } 1185 1186 ret = ath9k_htc_hw_init(hif_dev->htc_handle, 1187 &interface->dev, hif_dev->device_id, 1188 hif_dev->udev->product, id->driver_info); 1189 if (ret) { 1190 ret = -EINVAL; 1191 goto err_htc_hw_init; 1192 } 1193 1194 dev_info(&hif_dev->udev->dev, "ath9k_htc: USB layer initialized\n"); 1195 1196 return 0; 1197 1198 err_htc_hw_init: 1199 ath9k_hif_usb_dev_deinit(hif_dev); 1200 err_hif_init_usb: 1201 ath9k_htc_hw_free(hif_dev->htc_handle); 1202 err_htc_hw_alloc: 1203 usb_set_intfdata(interface, NULL); 1204 kfree(hif_dev); 1205 usb_put_dev(udev); 1206 err_alloc: 1207 return ret; 1208 } 1209 1210 static void ath9k_hif_usb_reboot(struct usb_device *udev) 1211 { 1212 u32 reboot_cmd = 0xffffffff; 1213 void *buf; 1214 int ret; 1215 1216 buf = kmemdup(&reboot_cmd, 4, GFP_KERNEL); 1217 if (!buf) 1218 return; 1219 1220 ret = usb_bulk_msg(udev, usb_sndbulkpipe(udev, USB_REG_OUT_PIPE), 1221 buf, 4, NULL, HZ); 1222 if (ret) 1223 dev_err(&udev->dev, "ath9k_htc: USB reboot failed\n"); 1224 1225 kfree(buf); 1226 } 1227 1228 static void ath9k_hif_usb_disconnect(struct usb_interface *interface) 1229 { 1230 struct usb_device *udev = interface_to_usbdev(interface); 1231 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1232 bool unplugged = (udev->state == USB_STATE_NOTATTACHED) ? true : false; 1233 1234 if (!hif_dev) 1235 return; 1236 1237 ath9k_htc_hw_deinit(hif_dev->htc_handle, unplugged); 1238 ath9k_htc_hw_free(hif_dev->htc_handle); 1239 ath9k_hif_usb_dev_deinit(hif_dev); 1240 usb_set_intfdata(interface, NULL); 1241 1242 if (!unplugged && (hif_dev->flags & HIF_USB_START)) 1243 ath9k_hif_usb_reboot(udev); 1244 1245 kfree(hif_dev); 1246 dev_info(&udev->dev, "ath9k_htc: USB layer deinitialized\n"); 1247 usb_put_dev(udev); 1248 } 1249 1250 #ifdef CONFIG_PM 1251 static int ath9k_hif_usb_suspend(struct usb_interface *interface, 1252 pm_message_t message) 1253 { 1254 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1255 1256 /* 1257 * The device has to be set to FULLSLEEP mode in case no 1258 * interface is up. 1259 */ 1260 if (!(hif_dev->flags & HIF_USB_START)) 1261 ath9k_htc_suspend(hif_dev->htc_handle); 1262 1263 ath9k_hif_usb_dealloc_urbs(hif_dev); 1264 1265 return 0; 1266 } 1267 1268 static int ath9k_hif_usb_resume(struct usb_interface *interface) 1269 { 1270 struct hif_device_usb *hif_dev = usb_get_intfdata(interface); 1271 struct htc_target *htc_handle = hif_dev->htc_handle; 1272 int ret; 1273 1274 ret = ath9k_hif_usb_alloc_urbs(hif_dev); 1275 if (ret) 1276 return ret; 1277 1278 if (hif_dev->firmware) { 1279 ret = ath9k_hif_usb_download_fw(hif_dev, 1280 htc_handle->drv_priv->ah->hw_version.usbdev); 1281 if (ret) 1282 goto fail_resume; 1283 } else { 1284 ath9k_hif_usb_dealloc_urbs(hif_dev); 1285 return -EIO; 1286 } 1287 1288 mdelay(100); 1289 1290 ret = ath9k_htc_resume(htc_handle); 1291 1292 if (ret) 1293 goto fail_resume; 1294 1295 return 0; 1296 1297 fail_resume: 1298 ath9k_hif_usb_dealloc_urbs(hif_dev); 1299 1300 return ret; 1301 } 1302 #endif 1303 1304 static struct usb_driver ath9k_hif_usb_driver = { 1305 .name = KBUILD_MODNAME, 1306 .probe = ath9k_hif_usb_probe, 1307 .disconnect = ath9k_hif_usb_disconnect, 1308 #ifdef CONFIG_PM 1309 .suspend = ath9k_hif_usb_suspend, 1310 .resume = ath9k_hif_usb_resume, 1311 .reset_resume = ath9k_hif_usb_resume, 1312 #endif 1313 .id_table = ath9k_hif_usb_ids, 1314 .soft_unbind = 1, 1315 }; 1316 1317 int ath9k_hif_usb_init(void) 1318 { 1319 return usb_register(&ath9k_hif_usb_driver); 1320 } 1321 1322 void ath9k_hif_usb_exit(void) 1323 { 1324 usb_deregister(&ath9k_hif_usb_driver); 1325 } 1326