1 // SPDX-License-Identifier: ISC 2 /* 3 * Copyright (c) 2007-2011 Atheros Communications Inc. 4 * Copyright (c) 2011-2012,2017 Qualcomm Atheros, Inc. 5 * Copyright (c) 2016-2017 Erik Stromdahl <erik.stromdahl@gmail.com> 6 */ 7 8 #include <linux/module.h> 9 #include <linux/usb.h> 10 11 #include "debug.h" 12 #include "core.h" 13 #include "bmi.h" 14 #include "hif.h" 15 #include "htc.h" 16 #include "usb.h" 17 18 static void ath10k_usb_post_recv_transfers(struct ath10k *ar, 19 struct ath10k_usb_pipe *recv_pipe); 20 21 /* inlined helper functions */ 22 23 static inline enum ath10k_htc_ep_id 24 eid_from_htc_hdr(struct ath10k_htc_hdr *htc_hdr) 25 { 26 return (enum ath10k_htc_ep_id)htc_hdr->eid; 27 } 28 29 static inline bool is_trailer_only_msg(struct ath10k_htc_hdr *htc_hdr) 30 { 31 return __le16_to_cpu(htc_hdr->len) == htc_hdr->trailer_len; 32 } 33 34 /* pipe/urb operations */ 35 static struct ath10k_urb_context * 36 ath10k_usb_alloc_urb_from_pipe(struct ath10k_usb_pipe *pipe) 37 { 38 struct ath10k_urb_context *urb_context = NULL; 39 unsigned long flags; 40 41 spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags); 42 if (!list_empty(&pipe->urb_list_head)) { 43 urb_context = list_first_entry(&pipe->urb_list_head, 44 struct ath10k_urb_context, link); 45 list_del(&urb_context->link); 46 pipe->urb_cnt--; 47 } 48 spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags); 49 50 return urb_context; 51 } 52 53 static void ath10k_usb_free_urb_to_pipe(struct ath10k_usb_pipe *pipe, 54 struct ath10k_urb_context *urb_context) 55 { 56 unsigned long flags; 57 58 spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags); 59 60 pipe->urb_cnt++; 61 list_add(&urb_context->link, &pipe->urb_list_head); 62 63 spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags); 64 } 65 66 static void ath10k_usb_cleanup_recv_urb(struct ath10k_urb_context *urb_context) 67 { 68 dev_kfree_skb(urb_context->skb); 69 urb_context->skb = NULL; 70 71 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context); 72 } 73 74 static void ath10k_usb_free_pipe_resources(struct ath10k *ar, 75 struct ath10k_usb_pipe *pipe) 76 { 77 struct ath10k_urb_context *urb_context; 78 79 if (!pipe->ar_usb) { 80 /* nothing allocated for this pipe */ 81 return; 82 } 83 84 ath10k_dbg(ar, ATH10K_DBG_USB, 85 "usb free resources lpipe %d hpipe 0x%x urbs %d avail %d\n", 86 pipe->logical_pipe_num, pipe->usb_pipe_handle, 87 pipe->urb_alloc, pipe->urb_cnt); 88 89 if (pipe->urb_alloc != pipe->urb_cnt) { 90 ath10k_dbg(ar, ATH10K_DBG_USB, 91 "usb urb leak lpipe %d hpipe 0x%x urbs %d avail %d\n", 92 pipe->logical_pipe_num, pipe->usb_pipe_handle, 93 pipe->urb_alloc, pipe->urb_cnt); 94 } 95 96 for (;;) { 97 urb_context = ath10k_usb_alloc_urb_from_pipe(pipe); 98 99 if (!urb_context) 100 break; 101 102 kfree(urb_context); 103 } 104 } 105 106 static void ath10k_usb_cleanup_pipe_resources(struct ath10k *ar) 107 { 108 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 109 int i; 110 111 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++) 112 ath10k_usb_free_pipe_resources(ar, &ar_usb->pipes[i]); 113 } 114 115 /* hif usb rx/tx completion functions */ 116 117 static void ath10k_usb_recv_complete(struct urb *urb) 118 { 119 struct ath10k_urb_context *urb_context = urb->context; 120 struct ath10k_usb_pipe *pipe = urb_context->pipe; 121 struct ath10k *ar = pipe->ar_usb->ar; 122 struct sk_buff *skb; 123 int status = 0; 124 125 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 126 "usb recv pipe %d stat %d len %d urb 0x%pK\n", 127 pipe->logical_pipe_num, urb->status, urb->actual_length, 128 urb); 129 130 if (urb->status != 0) { 131 status = -EIO; 132 switch (urb->status) { 133 case -ECONNRESET: 134 case -ENOENT: 135 case -ESHUTDOWN: 136 /* no need to spew these errors when device 137 * removed or urb killed due to driver shutdown 138 */ 139 status = -ECANCELED; 140 break; 141 default: 142 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 143 "usb recv pipe %d ep 0x%2.2x failed: %d\n", 144 pipe->logical_pipe_num, 145 pipe->ep_address, urb->status); 146 break; 147 } 148 goto cleanup_recv_urb; 149 } 150 151 if (urb->actual_length == 0) 152 goto cleanup_recv_urb; 153 154 skb = urb_context->skb; 155 156 /* we are going to pass it up */ 157 urb_context->skb = NULL; 158 skb_put(skb, urb->actual_length); 159 160 /* note: queue implements a lock */ 161 skb_queue_tail(&pipe->io_comp_queue, skb); 162 schedule_work(&pipe->io_complete_work); 163 164 cleanup_recv_urb: 165 ath10k_usb_cleanup_recv_urb(urb_context); 166 167 if (status == 0 && 168 pipe->urb_cnt >= pipe->urb_cnt_thresh) { 169 /* our free urbs are piling up, post more transfers */ 170 ath10k_usb_post_recv_transfers(ar, pipe); 171 } 172 } 173 174 static void ath10k_usb_transmit_complete(struct urb *urb) 175 { 176 struct ath10k_urb_context *urb_context = urb->context; 177 struct ath10k_usb_pipe *pipe = urb_context->pipe; 178 struct ath10k *ar = pipe->ar_usb->ar; 179 struct sk_buff *skb; 180 181 if (urb->status != 0) { 182 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 183 "pipe: %d, failed:%d\n", 184 pipe->logical_pipe_num, urb->status); 185 } 186 187 skb = urb_context->skb; 188 urb_context->skb = NULL; 189 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context); 190 191 /* note: queue implements a lock */ 192 skb_queue_tail(&pipe->io_comp_queue, skb); 193 schedule_work(&pipe->io_complete_work); 194 } 195 196 /* pipe operations */ 197 static void ath10k_usb_post_recv_transfers(struct ath10k *ar, 198 struct ath10k_usb_pipe *recv_pipe) 199 { 200 struct ath10k_urb_context *urb_context; 201 struct urb *urb; 202 int usb_status; 203 204 for (;;) { 205 urb_context = ath10k_usb_alloc_urb_from_pipe(recv_pipe); 206 if (!urb_context) 207 break; 208 209 urb_context->skb = dev_alloc_skb(ATH10K_USB_RX_BUFFER_SIZE); 210 if (!urb_context->skb) 211 goto err; 212 213 urb = usb_alloc_urb(0, GFP_ATOMIC); 214 if (!urb) 215 goto err; 216 217 usb_fill_bulk_urb(urb, 218 recv_pipe->ar_usb->udev, 219 recv_pipe->usb_pipe_handle, 220 urb_context->skb->data, 221 ATH10K_USB_RX_BUFFER_SIZE, 222 ath10k_usb_recv_complete, urb_context); 223 224 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 225 "usb bulk recv submit %d 0x%x ep 0x%2.2x len %d buf 0x%pK\n", 226 recv_pipe->logical_pipe_num, 227 recv_pipe->usb_pipe_handle, recv_pipe->ep_address, 228 ATH10K_USB_RX_BUFFER_SIZE, urb_context->skb); 229 230 usb_anchor_urb(urb, &recv_pipe->urb_submitted); 231 usb_status = usb_submit_urb(urb, GFP_ATOMIC); 232 233 if (usb_status) { 234 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 235 "usb bulk recv failed: %d\n", 236 usb_status); 237 usb_unanchor_urb(urb); 238 usb_free_urb(urb); 239 goto err; 240 } 241 usb_free_urb(urb); 242 } 243 244 return; 245 246 err: 247 ath10k_usb_cleanup_recv_urb(urb_context); 248 } 249 250 static void ath10k_usb_flush_all(struct ath10k *ar) 251 { 252 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 253 int i; 254 255 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++) { 256 if (ar_usb->pipes[i].ar_usb) { 257 usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted); 258 cancel_work_sync(&ar_usb->pipes[i].io_complete_work); 259 } 260 } 261 } 262 263 static void ath10k_usb_start_recv_pipes(struct ath10k *ar) 264 { 265 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 266 267 ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA].urb_cnt_thresh = 1; 268 269 ath10k_usb_post_recv_transfers(ar, 270 &ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA]); 271 } 272 273 static void ath10k_usb_tx_complete(struct ath10k *ar, struct sk_buff *skb) 274 { 275 struct ath10k_htc_hdr *htc_hdr; 276 struct ath10k_htc_ep *ep; 277 278 htc_hdr = (struct ath10k_htc_hdr *)skb->data; 279 ep = &ar->htc.endpoint[htc_hdr->eid]; 280 ath10k_htc_notify_tx_completion(ep, skb); 281 /* The TX complete handler now owns the skb... */ 282 } 283 284 static void ath10k_usb_rx_complete(struct ath10k *ar, struct sk_buff *skb) 285 { 286 struct ath10k_htc *htc = &ar->htc; 287 struct ath10k_htc_hdr *htc_hdr; 288 enum ath10k_htc_ep_id eid; 289 struct ath10k_htc_ep *ep; 290 u16 payload_len; 291 u8 *trailer; 292 int ret; 293 294 htc_hdr = (struct ath10k_htc_hdr *)skb->data; 295 eid = eid_from_htc_hdr(htc_hdr); 296 ep = &ar->htc.endpoint[eid]; 297 298 if (ep->service_id == 0) { 299 ath10k_warn(ar, "ep %d is not connected\n", eid); 300 goto out_free_skb; 301 } 302 303 payload_len = le16_to_cpu(htc_hdr->len); 304 if (!payload_len) { 305 ath10k_warn(ar, "zero length frame received, firmware crashed?\n"); 306 goto out_free_skb; 307 } 308 309 if (payload_len < htc_hdr->trailer_len) { 310 ath10k_warn(ar, "malformed frame received, firmware crashed?\n"); 311 goto out_free_skb; 312 } 313 314 if (htc_hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT) { 315 trailer = skb->data + sizeof(*htc_hdr) + payload_len - 316 htc_hdr->trailer_len; 317 318 ret = ath10k_htc_process_trailer(htc, 319 trailer, 320 htc_hdr->trailer_len, 321 eid, 322 NULL, 323 NULL); 324 if (ret) 325 goto out_free_skb; 326 327 if (is_trailer_only_msg(htc_hdr)) 328 goto out_free_skb; 329 330 /* strip off the trailer from the skb since it should not 331 * be passed on to upper layers 332 */ 333 skb_trim(skb, skb->len - htc_hdr->trailer_len); 334 } 335 336 skb_pull(skb, sizeof(*htc_hdr)); 337 ep->ep_ops.ep_rx_complete(ar, skb); 338 /* The RX complete handler now owns the skb... */ 339 340 return; 341 342 out_free_skb: 343 dev_kfree_skb(skb); 344 } 345 346 static void ath10k_usb_io_comp_work(struct work_struct *work) 347 { 348 struct ath10k_usb_pipe *pipe = container_of(work, 349 struct ath10k_usb_pipe, 350 io_complete_work); 351 struct ath10k *ar = pipe->ar_usb->ar; 352 struct sk_buff *skb; 353 354 while ((skb = skb_dequeue(&pipe->io_comp_queue))) { 355 if (pipe->flags & ATH10K_USB_PIPE_FLAG_TX) 356 ath10k_usb_tx_complete(ar, skb); 357 else 358 ath10k_usb_rx_complete(ar, skb); 359 } 360 } 361 362 #define ATH10K_USB_MAX_DIAG_CMD (sizeof(struct ath10k_usb_ctrl_diag_cmd_write)) 363 #define ATH10K_USB_MAX_DIAG_RESP (sizeof(struct ath10k_usb_ctrl_diag_resp_read)) 364 365 static void ath10k_usb_destroy(struct ath10k *ar) 366 { 367 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 368 369 ath10k_usb_flush_all(ar); 370 ath10k_usb_cleanup_pipe_resources(ar); 371 usb_set_intfdata(ar_usb->interface, NULL); 372 373 kfree(ar_usb->diag_cmd_buffer); 374 kfree(ar_usb->diag_resp_buffer); 375 } 376 377 static int ath10k_usb_hif_start(struct ath10k *ar) 378 { 379 int i; 380 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 381 382 ath10k_usb_start_recv_pipes(ar); 383 384 /* set the TX resource avail threshold for each TX pipe */ 385 for (i = ATH10K_USB_PIPE_TX_CTRL; 386 i <= ATH10K_USB_PIPE_TX_DATA_HP; i++) { 387 ar_usb->pipes[i].urb_cnt_thresh = 388 ar_usb->pipes[i].urb_alloc / 2; 389 } 390 391 return 0; 392 } 393 394 static int ath10k_usb_hif_tx_sg(struct ath10k *ar, u8 pipe_id, 395 struct ath10k_hif_sg_item *items, int n_items) 396 { 397 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 398 struct ath10k_usb_pipe *pipe = &ar_usb->pipes[pipe_id]; 399 struct ath10k_urb_context *urb_context; 400 struct sk_buff *skb; 401 struct urb *urb; 402 int ret, i; 403 404 for (i = 0; i < n_items; i++) { 405 urb_context = ath10k_usb_alloc_urb_from_pipe(pipe); 406 if (!urb_context) { 407 ret = -ENOMEM; 408 goto err; 409 } 410 411 skb = items[i].transfer_context; 412 urb_context->skb = skb; 413 414 urb = usb_alloc_urb(0, GFP_ATOMIC); 415 if (!urb) { 416 ret = -ENOMEM; 417 goto err_free_urb_to_pipe; 418 } 419 420 usb_fill_bulk_urb(urb, 421 ar_usb->udev, 422 pipe->usb_pipe_handle, 423 skb->data, 424 skb->len, 425 ath10k_usb_transmit_complete, urb_context); 426 427 if (!(skb->len % pipe->max_packet_size)) { 428 /* hit a max packet boundary on this pipe */ 429 urb->transfer_flags |= URB_ZERO_PACKET; 430 } 431 432 usb_anchor_urb(urb, &pipe->urb_submitted); 433 ret = usb_submit_urb(urb, GFP_ATOMIC); 434 if (ret) { 435 ath10k_dbg(ar, ATH10K_DBG_USB_BULK, 436 "usb bulk transmit failed: %d\n", ret); 437 usb_unanchor_urb(urb); 438 ret = -EINVAL; 439 goto err_free_urb_to_pipe; 440 } 441 442 usb_free_urb(urb); 443 } 444 445 return 0; 446 447 err_free_urb_to_pipe: 448 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context); 449 err: 450 return ret; 451 } 452 453 static void ath10k_usb_hif_stop(struct ath10k *ar) 454 { 455 ath10k_usb_flush_all(ar); 456 } 457 458 static u16 ath10k_usb_hif_get_free_queue_number(struct ath10k *ar, u8 pipe_id) 459 { 460 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 461 462 return ar_usb->pipes[pipe_id].urb_cnt; 463 } 464 465 static int ath10k_usb_submit_ctrl_out(struct ath10k *ar, 466 u8 req, u16 value, u16 index, void *data, 467 u32 size) 468 { 469 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 470 u8 *buf = NULL; 471 int ret; 472 473 if (size > 0) { 474 buf = kmemdup(data, size, GFP_KERNEL); 475 if (!buf) 476 return -ENOMEM; 477 } 478 479 /* note: if successful returns number of bytes transferred */ 480 ret = usb_control_msg(ar_usb->udev, 481 usb_sndctrlpipe(ar_usb->udev, 0), 482 req, 483 USB_DIR_OUT | USB_TYPE_VENDOR | 484 USB_RECIP_DEVICE, value, index, buf, 485 size, 1000); 486 487 if (ret < 0) { 488 ath10k_warn(ar, "Failed to submit usb control message: %d\n", 489 ret); 490 kfree(buf); 491 return ret; 492 } 493 494 kfree(buf); 495 496 return 0; 497 } 498 499 static int ath10k_usb_submit_ctrl_in(struct ath10k *ar, 500 u8 req, u16 value, u16 index, void *data, 501 u32 size) 502 { 503 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 504 u8 *buf = NULL; 505 int ret; 506 507 if (size > 0) { 508 buf = kmalloc(size, GFP_KERNEL); 509 if (!buf) 510 return -ENOMEM; 511 } 512 513 /* note: if successful returns number of bytes transferred */ 514 ret = usb_control_msg(ar_usb->udev, 515 usb_rcvctrlpipe(ar_usb->udev, 0), 516 req, 517 USB_DIR_IN | USB_TYPE_VENDOR | 518 USB_RECIP_DEVICE, value, index, buf, 519 size, 2 * HZ); 520 521 if (ret < 0) { 522 ath10k_warn(ar, "Failed to read usb control message: %d\n", 523 ret); 524 kfree(buf); 525 return ret; 526 } 527 528 memcpy((u8 *)data, buf, size); 529 530 kfree(buf); 531 532 return 0; 533 } 534 535 static int ath10k_usb_ctrl_msg_exchange(struct ath10k *ar, 536 u8 req_val, u8 *req_buf, u32 req_len, 537 u8 resp_val, u8 *resp_buf, 538 u32 *resp_len) 539 { 540 int ret; 541 542 /* send command */ 543 ret = ath10k_usb_submit_ctrl_out(ar, req_val, 0, 0, 544 req_buf, req_len); 545 if (ret) 546 goto err; 547 548 /* get response */ 549 if (resp_buf) { 550 ret = ath10k_usb_submit_ctrl_in(ar, resp_val, 0, 0, 551 resp_buf, *resp_len); 552 if (ret) 553 goto err; 554 } 555 556 return 0; 557 err: 558 return ret; 559 } 560 561 static int ath10k_usb_hif_diag_read(struct ath10k *ar, u32 address, void *buf, 562 size_t buf_len) 563 { 564 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 565 struct ath10k_usb_ctrl_diag_cmd_read *cmd; 566 u32 resp_len; 567 int ret; 568 569 if (buf_len < sizeof(struct ath10k_usb_ctrl_diag_resp_read)) 570 return -EINVAL; 571 572 cmd = (struct ath10k_usb_ctrl_diag_cmd_read *)ar_usb->diag_cmd_buffer; 573 memset(cmd, 0, sizeof(*cmd)); 574 cmd->cmd = ATH10K_USB_CTRL_DIAG_CC_READ; 575 cmd->address = cpu_to_le32(address); 576 resp_len = sizeof(struct ath10k_usb_ctrl_diag_resp_read); 577 578 ret = ath10k_usb_ctrl_msg_exchange(ar, 579 ATH10K_USB_CONTROL_REQ_DIAG_CMD, 580 (u8 *)cmd, 581 sizeof(*cmd), 582 ATH10K_USB_CONTROL_REQ_DIAG_RESP, 583 ar_usb->diag_resp_buffer, &resp_len); 584 if (ret) 585 return ret; 586 587 if (resp_len != sizeof(struct ath10k_usb_ctrl_diag_resp_read)) 588 return -EMSGSIZE; 589 590 memcpy(buf, ar_usb->diag_resp_buffer, 591 sizeof(struct ath10k_usb_ctrl_diag_resp_read)); 592 593 return 0; 594 } 595 596 static int ath10k_usb_hif_diag_write(struct ath10k *ar, u32 address, 597 const void *data, int nbytes) 598 { 599 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 600 struct ath10k_usb_ctrl_diag_cmd_write *cmd; 601 int ret; 602 603 if (nbytes != sizeof(cmd->value)) 604 return -EINVAL; 605 606 cmd = (struct ath10k_usb_ctrl_diag_cmd_write *)ar_usb->diag_cmd_buffer; 607 memset(cmd, 0, sizeof(*cmd)); 608 cmd->cmd = cpu_to_le32(ATH10K_USB_CTRL_DIAG_CC_WRITE); 609 cmd->address = cpu_to_le32(address); 610 memcpy(&cmd->value, data, nbytes); 611 612 ret = ath10k_usb_ctrl_msg_exchange(ar, 613 ATH10K_USB_CONTROL_REQ_DIAG_CMD, 614 (u8 *)cmd, 615 sizeof(*cmd), 616 0, NULL, NULL); 617 if (ret) 618 return ret; 619 620 return 0; 621 } 622 623 static int ath10k_usb_bmi_exchange_msg(struct ath10k *ar, 624 void *req, u32 req_len, 625 void *resp, u32 *resp_len) 626 { 627 int ret; 628 629 if (req) { 630 ret = ath10k_usb_submit_ctrl_out(ar, 631 ATH10K_USB_CONTROL_REQ_SEND_BMI_CMD, 632 0, 0, req, req_len); 633 if (ret) { 634 ath10k_warn(ar, 635 "unable to send the bmi data to the device: %d\n", 636 ret); 637 return ret; 638 } 639 } 640 641 if (resp) { 642 ret = ath10k_usb_submit_ctrl_in(ar, 643 ATH10K_USB_CONTROL_REQ_RECV_BMI_RESP, 644 0, 0, resp, *resp_len); 645 if (ret) { 646 ath10k_warn(ar, 647 "Unable to read the bmi data from the device: %d\n", 648 ret); 649 return ret; 650 } 651 } 652 653 return 0; 654 } 655 656 static void ath10k_usb_hif_get_default_pipe(struct ath10k *ar, 657 u8 *ul_pipe, u8 *dl_pipe) 658 { 659 *ul_pipe = ATH10K_USB_PIPE_TX_CTRL; 660 *dl_pipe = ATH10K_USB_PIPE_RX_CTRL; 661 } 662 663 static int ath10k_usb_hif_map_service_to_pipe(struct ath10k *ar, u16 svc_id, 664 u8 *ul_pipe, u8 *dl_pipe) 665 { 666 switch (svc_id) { 667 case ATH10K_HTC_SVC_ID_RSVD_CTRL: 668 case ATH10K_HTC_SVC_ID_WMI_CONTROL: 669 *ul_pipe = ATH10K_USB_PIPE_TX_CTRL; 670 /* due to large control packets, shift to data pipe */ 671 *dl_pipe = ATH10K_USB_PIPE_RX_DATA; 672 break; 673 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG: 674 *ul_pipe = ATH10K_USB_PIPE_TX_DATA_LP; 675 /* Disable rxdata2 directly, it will be enabled 676 * if FW enable rxdata2 677 */ 678 *dl_pipe = ATH10K_USB_PIPE_RX_DATA; 679 break; 680 default: 681 return -EPERM; 682 } 683 684 return 0; 685 } 686 687 /* This op is currently only used by htc_wait_target if the HTC ready 688 * message times out. It is not applicable for USB since there is nothing 689 * we can do if the HTC ready message does not arrive in time. 690 * TODO: Make this op non mandatory by introducing a NULL check in the 691 * hif op wrapper. 692 */ 693 static void ath10k_usb_hif_send_complete_check(struct ath10k *ar, 694 u8 pipe, int force) 695 { 696 } 697 698 static int ath10k_usb_hif_power_up(struct ath10k *ar, 699 enum ath10k_firmware_mode fw_mode) 700 { 701 return 0; 702 } 703 704 static void ath10k_usb_hif_power_down(struct ath10k *ar) 705 { 706 ath10k_usb_flush_all(ar); 707 } 708 709 #ifdef CONFIG_PM 710 711 static int ath10k_usb_hif_suspend(struct ath10k *ar) 712 { 713 return -EOPNOTSUPP; 714 } 715 716 static int ath10k_usb_hif_resume(struct ath10k *ar) 717 { 718 return -EOPNOTSUPP; 719 } 720 #endif 721 722 static const struct ath10k_hif_ops ath10k_usb_hif_ops = { 723 .tx_sg = ath10k_usb_hif_tx_sg, 724 .diag_read = ath10k_usb_hif_diag_read, 725 .diag_write = ath10k_usb_hif_diag_write, 726 .exchange_bmi_msg = ath10k_usb_bmi_exchange_msg, 727 .start = ath10k_usb_hif_start, 728 .stop = ath10k_usb_hif_stop, 729 .map_service_to_pipe = ath10k_usb_hif_map_service_to_pipe, 730 .get_default_pipe = ath10k_usb_hif_get_default_pipe, 731 .send_complete_check = ath10k_usb_hif_send_complete_check, 732 .get_free_queue_number = ath10k_usb_hif_get_free_queue_number, 733 .power_up = ath10k_usb_hif_power_up, 734 .power_down = ath10k_usb_hif_power_down, 735 #ifdef CONFIG_PM 736 .suspend = ath10k_usb_hif_suspend, 737 .resume = ath10k_usb_hif_resume, 738 #endif 739 }; 740 741 static u8 ath10k_usb_get_logical_pipe_num(u8 ep_address, int *urb_count) 742 { 743 u8 pipe_num = ATH10K_USB_PIPE_INVALID; 744 745 switch (ep_address) { 746 case ATH10K_USB_EP_ADDR_APP_CTRL_IN: 747 pipe_num = ATH10K_USB_PIPE_RX_CTRL; 748 *urb_count = RX_URB_COUNT; 749 break; 750 case ATH10K_USB_EP_ADDR_APP_DATA_IN: 751 pipe_num = ATH10K_USB_PIPE_RX_DATA; 752 *urb_count = RX_URB_COUNT; 753 break; 754 case ATH10K_USB_EP_ADDR_APP_INT_IN: 755 pipe_num = ATH10K_USB_PIPE_RX_INT; 756 *urb_count = RX_URB_COUNT; 757 break; 758 case ATH10K_USB_EP_ADDR_APP_DATA2_IN: 759 pipe_num = ATH10K_USB_PIPE_RX_DATA2; 760 *urb_count = RX_URB_COUNT; 761 break; 762 case ATH10K_USB_EP_ADDR_APP_CTRL_OUT: 763 pipe_num = ATH10K_USB_PIPE_TX_CTRL; 764 *urb_count = TX_URB_COUNT; 765 break; 766 case ATH10K_USB_EP_ADDR_APP_DATA_LP_OUT: 767 pipe_num = ATH10K_USB_PIPE_TX_DATA_LP; 768 *urb_count = TX_URB_COUNT; 769 break; 770 case ATH10K_USB_EP_ADDR_APP_DATA_MP_OUT: 771 pipe_num = ATH10K_USB_PIPE_TX_DATA_MP; 772 *urb_count = TX_URB_COUNT; 773 break; 774 case ATH10K_USB_EP_ADDR_APP_DATA_HP_OUT: 775 pipe_num = ATH10K_USB_PIPE_TX_DATA_HP; 776 *urb_count = TX_URB_COUNT; 777 break; 778 default: 779 /* note: there may be endpoints not currently used */ 780 break; 781 } 782 783 return pipe_num; 784 } 785 786 static int ath10k_usb_alloc_pipe_resources(struct ath10k *ar, 787 struct ath10k_usb_pipe *pipe, 788 int urb_cnt) 789 { 790 struct ath10k_urb_context *urb_context; 791 int i; 792 793 INIT_LIST_HEAD(&pipe->urb_list_head); 794 init_usb_anchor(&pipe->urb_submitted); 795 796 for (i = 0; i < urb_cnt; i++) { 797 urb_context = kzalloc(sizeof(*urb_context), GFP_KERNEL); 798 if (!urb_context) 799 return -ENOMEM; 800 801 urb_context->pipe = pipe; 802 803 /* we are only allocate the urb contexts here, the actual URB 804 * is allocated from the kernel as needed to do a transaction 805 */ 806 pipe->urb_alloc++; 807 ath10k_usb_free_urb_to_pipe(pipe, urb_context); 808 } 809 810 ath10k_dbg(ar, ATH10K_DBG_USB, 811 "usb alloc resources lpipe %d hpipe 0x%x urbs %d\n", 812 pipe->logical_pipe_num, pipe->usb_pipe_handle, 813 pipe->urb_alloc); 814 815 return 0; 816 } 817 818 static int ath10k_usb_setup_pipe_resources(struct ath10k *ar, 819 struct usb_interface *interface) 820 { 821 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 822 struct usb_host_interface *iface_desc = interface->cur_altsetting; 823 struct usb_endpoint_descriptor *endpoint; 824 struct ath10k_usb_pipe *pipe; 825 int ret, i, urbcount; 826 u8 pipe_num; 827 828 ath10k_dbg(ar, ATH10K_DBG_USB, "usb setting up pipes using interface\n"); 829 830 /* walk decriptors and setup pipes */ 831 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 832 endpoint = &iface_desc->endpoint[i].desc; 833 834 if (ATH10K_USB_IS_BULK_EP(endpoint->bmAttributes)) { 835 ath10k_dbg(ar, ATH10K_DBG_USB, 836 "usb %s bulk ep 0x%2.2x maxpktsz %d\n", 837 ATH10K_USB_IS_DIR_IN 838 (endpoint->bEndpointAddress) ? 839 "rx" : "tx", endpoint->bEndpointAddress, 840 le16_to_cpu(endpoint->wMaxPacketSize)); 841 } else if (ATH10K_USB_IS_INT_EP(endpoint->bmAttributes)) { 842 ath10k_dbg(ar, ATH10K_DBG_USB, 843 "usb %s int ep 0x%2.2x maxpktsz %d interval %d\n", 844 ATH10K_USB_IS_DIR_IN 845 (endpoint->bEndpointAddress) ? 846 "rx" : "tx", endpoint->bEndpointAddress, 847 le16_to_cpu(endpoint->wMaxPacketSize), 848 endpoint->bInterval); 849 } else if (ATH10K_USB_IS_ISOC_EP(endpoint->bmAttributes)) { 850 /* TODO for ISO */ 851 ath10k_dbg(ar, ATH10K_DBG_USB, 852 "usb %s isoc ep 0x%2.2x maxpktsz %d interval %d\n", 853 ATH10K_USB_IS_DIR_IN 854 (endpoint->bEndpointAddress) ? 855 "rx" : "tx", endpoint->bEndpointAddress, 856 le16_to_cpu(endpoint->wMaxPacketSize), 857 endpoint->bInterval); 858 } 859 urbcount = 0; 860 861 pipe_num = 862 ath10k_usb_get_logical_pipe_num(endpoint->bEndpointAddress, 863 &urbcount); 864 if (pipe_num == ATH10K_USB_PIPE_INVALID) 865 continue; 866 867 pipe = &ar_usb->pipes[pipe_num]; 868 if (pipe->ar_usb) 869 /* hmmm..pipe was already setup */ 870 continue; 871 872 pipe->ar_usb = ar_usb; 873 pipe->logical_pipe_num = pipe_num; 874 pipe->ep_address = endpoint->bEndpointAddress; 875 pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize); 876 877 if (ATH10K_USB_IS_BULK_EP(endpoint->bmAttributes)) { 878 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) { 879 pipe->usb_pipe_handle = 880 usb_rcvbulkpipe(ar_usb->udev, 881 pipe->ep_address); 882 } else { 883 pipe->usb_pipe_handle = 884 usb_sndbulkpipe(ar_usb->udev, 885 pipe->ep_address); 886 } 887 } else if (ATH10K_USB_IS_INT_EP(endpoint->bmAttributes)) { 888 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) { 889 pipe->usb_pipe_handle = 890 usb_rcvintpipe(ar_usb->udev, 891 pipe->ep_address); 892 } else { 893 pipe->usb_pipe_handle = 894 usb_sndintpipe(ar_usb->udev, 895 pipe->ep_address); 896 } 897 } else if (ATH10K_USB_IS_ISOC_EP(endpoint->bmAttributes)) { 898 /* TODO for ISO */ 899 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) { 900 pipe->usb_pipe_handle = 901 usb_rcvisocpipe(ar_usb->udev, 902 pipe->ep_address); 903 } else { 904 pipe->usb_pipe_handle = 905 usb_sndisocpipe(ar_usb->udev, 906 pipe->ep_address); 907 } 908 } 909 910 pipe->ep_desc = endpoint; 911 912 if (!ATH10K_USB_IS_DIR_IN(pipe->ep_address)) 913 pipe->flags |= ATH10K_USB_PIPE_FLAG_TX; 914 915 ret = ath10k_usb_alloc_pipe_resources(ar, pipe, urbcount); 916 if (ret) 917 return ret; 918 } 919 920 return 0; 921 } 922 923 static int ath10k_usb_create(struct ath10k *ar, 924 struct usb_interface *interface) 925 { 926 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar); 927 struct usb_device *dev = interface_to_usbdev(interface); 928 struct ath10k_usb_pipe *pipe; 929 int ret, i; 930 931 usb_set_intfdata(interface, ar_usb); 932 spin_lock_init(&ar_usb->cs_lock); 933 ar_usb->udev = dev; 934 ar_usb->interface = interface; 935 936 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++) { 937 pipe = &ar_usb->pipes[i]; 938 INIT_WORK(&pipe->io_complete_work, 939 ath10k_usb_io_comp_work); 940 skb_queue_head_init(&pipe->io_comp_queue); 941 } 942 943 ar_usb->diag_cmd_buffer = kzalloc(ATH10K_USB_MAX_DIAG_CMD, GFP_KERNEL); 944 if (!ar_usb->diag_cmd_buffer) { 945 ret = -ENOMEM; 946 goto err; 947 } 948 949 ar_usb->diag_resp_buffer = kzalloc(ATH10K_USB_MAX_DIAG_RESP, 950 GFP_KERNEL); 951 if (!ar_usb->diag_resp_buffer) { 952 ret = -ENOMEM; 953 goto err; 954 } 955 956 ret = ath10k_usb_setup_pipe_resources(ar, interface); 957 if (ret) 958 goto err; 959 960 return 0; 961 962 err: 963 ath10k_usb_destroy(ar); 964 return ret; 965 } 966 967 /* ath10k usb driver registered functions */ 968 static int ath10k_usb_probe(struct usb_interface *interface, 969 const struct usb_device_id *id) 970 { 971 struct ath10k *ar; 972 struct ath10k_usb *ar_usb; 973 struct usb_device *dev = interface_to_usbdev(interface); 974 int ret, vendor_id, product_id; 975 enum ath10k_hw_rev hw_rev; 976 struct ath10k_bus_params bus_params; 977 978 /* Assumption: All USB based chipsets (so far) are QCA9377 based. 979 * If there will be newer chipsets that does not use the hw reg 980 * setup as defined in qca6174_regs and qca6174_values, this 981 * assumption is no longer valid and hw_rev must be setup differently 982 * depending on chipset. 983 */ 984 hw_rev = ATH10K_HW_QCA9377; 985 986 ar = ath10k_core_create(sizeof(*ar_usb), &dev->dev, ATH10K_BUS_USB, 987 hw_rev, &ath10k_usb_hif_ops); 988 if (!ar) { 989 dev_err(&dev->dev, "failed to allocate core\n"); 990 return -ENOMEM; 991 } 992 993 usb_get_dev(dev); 994 vendor_id = le16_to_cpu(dev->descriptor.idVendor); 995 product_id = le16_to_cpu(dev->descriptor.idProduct); 996 997 ath10k_dbg(ar, ATH10K_DBG_BOOT, 998 "usb new func vendor 0x%04x product 0x%04x\n", 999 vendor_id, product_id); 1000 1001 ar_usb = ath10k_usb_priv(ar); 1002 ret = ath10k_usb_create(ar, interface); 1003 ar_usb->ar = ar; 1004 1005 ar->dev_id = product_id; 1006 ar->id.vendor = vendor_id; 1007 ar->id.device = product_id; 1008 1009 bus_params.dev_type = ATH10K_DEV_TYPE_HL; 1010 /* TODO: don't know yet how to get chip_id with USB */ 1011 bus_params.chip_id = 0; 1012 ret = ath10k_core_register(ar, &bus_params); 1013 if (ret) { 1014 ath10k_warn(ar, "failed to register driver core: %d\n", ret); 1015 goto err; 1016 } 1017 1018 /* TODO: remove this once USB support is fully implemented */ 1019 ath10k_warn(ar, "WARNING: ath10k USB support is incomplete, don't expect anything to work!\n"); 1020 1021 return 0; 1022 1023 err: 1024 ath10k_core_destroy(ar); 1025 1026 usb_put_dev(dev); 1027 1028 return ret; 1029 } 1030 1031 static void ath10k_usb_remove(struct usb_interface *interface) 1032 { 1033 struct ath10k_usb *ar_usb; 1034 1035 ar_usb = usb_get_intfdata(interface); 1036 if (!ar_usb) 1037 return; 1038 1039 ath10k_core_unregister(ar_usb->ar); 1040 ath10k_usb_destroy(ar_usb->ar); 1041 usb_put_dev(interface_to_usbdev(interface)); 1042 ath10k_core_destroy(ar_usb->ar); 1043 } 1044 1045 #ifdef CONFIG_PM 1046 1047 static int ath10k_usb_pm_suspend(struct usb_interface *interface, 1048 pm_message_t message) 1049 { 1050 struct ath10k_usb *ar_usb = usb_get_intfdata(interface); 1051 1052 ath10k_usb_flush_all(ar_usb->ar); 1053 return 0; 1054 } 1055 1056 static int ath10k_usb_pm_resume(struct usb_interface *interface) 1057 { 1058 struct ath10k_usb *ar_usb = usb_get_intfdata(interface); 1059 struct ath10k *ar = ar_usb->ar; 1060 1061 ath10k_usb_post_recv_transfers(ar, 1062 &ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA]); 1063 1064 return 0; 1065 } 1066 1067 #else 1068 1069 #define ath10k_usb_pm_suspend NULL 1070 #define ath10k_usb_pm_resume NULL 1071 1072 #endif 1073 1074 /* table of devices that work with this driver */ 1075 static struct usb_device_id ath10k_usb_ids[] = { 1076 {USB_DEVICE(0x13b1, 0x0042)}, /* Linksys WUSB6100M */ 1077 { /* Terminating entry */ }, 1078 }; 1079 1080 MODULE_DEVICE_TABLE(usb, ath10k_usb_ids); 1081 1082 static struct usb_driver ath10k_usb_driver = { 1083 .name = "ath10k_usb", 1084 .probe = ath10k_usb_probe, 1085 .suspend = ath10k_usb_pm_suspend, 1086 .resume = ath10k_usb_pm_resume, 1087 .disconnect = ath10k_usb_remove, 1088 .id_table = ath10k_usb_ids, 1089 .supports_autosuspend = true, 1090 .disable_hub_initiated_lpm = 1, 1091 }; 1092 1093 module_usb_driver(ath10k_usb_driver); 1094 1095 MODULE_AUTHOR("Atheros Communications, Inc."); 1096 MODULE_DESCRIPTION("Driver support for Qualcomm Atheros 802.11ac WLAN USB devices"); 1097 MODULE_LICENSE("Dual BSD/GPL"); 1098