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
eid_from_htc_hdr(struct ath10k_htc_hdr * htc_hdr)24 eid_from_htc_hdr(struct ath10k_htc_hdr *htc_hdr)
25 {
26 return (enum ath10k_htc_ep_id)htc_hdr->eid;
27 }
28
is_trailer_only_msg(struct ath10k_htc_hdr * htc_hdr)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 *
ath10k_usb_alloc_urb_from_pipe(struct ath10k_usb_pipe * pipe)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 /* bail if this pipe is not initialized */
42 if (!pipe->ar_usb)
43 return NULL;
44
45 spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
46 if (!list_empty(&pipe->urb_list_head)) {
47 urb_context = list_first_entry(&pipe->urb_list_head,
48 struct ath10k_urb_context, link);
49 list_del(&urb_context->link);
50 pipe->urb_cnt--;
51 }
52 spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
53
54 return urb_context;
55 }
56
ath10k_usb_free_urb_to_pipe(struct ath10k_usb_pipe * pipe,struct ath10k_urb_context * urb_context)57 static void ath10k_usb_free_urb_to_pipe(struct ath10k_usb_pipe *pipe,
58 struct ath10k_urb_context *urb_context)
59 {
60 unsigned long flags;
61
62 /* bail if this pipe is not initialized */
63 if (!pipe->ar_usb)
64 return;
65
66 spin_lock_irqsave(&pipe->ar_usb->cs_lock, flags);
67
68 pipe->urb_cnt++;
69 list_add(&urb_context->link, &pipe->urb_list_head);
70
71 spin_unlock_irqrestore(&pipe->ar_usb->cs_lock, flags);
72 }
73
ath10k_usb_cleanup_recv_urb(struct ath10k_urb_context * urb_context)74 static void ath10k_usb_cleanup_recv_urb(struct ath10k_urb_context *urb_context)
75 {
76 dev_kfree_skb(urb_context->skb);
77 urb_context->skb = NULL;
78
79 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
80 }
81
ath10k_usb_free_pipe_resources(struct ath10k * ar,struct ath10k_usb_pipe * pipe)82 static void ath10k_usb_free_pipe_resources(struct ath10k *ar,
83 struct ath10k_usb_pipe *pipe)
84 {
85 struct ath10k_urb_context *urb_context;
86
87 if (!pipe->ar_usb) {
88 /* nothing allocated for this pipe */
89 return;
90 }
91
92 ath10k_dbg(ar, ATH10K_DBG_USB,
93 "usb free resources lpipe %d hpipe 0x%x urbs %d avail %d\n",
94 pipe->logical_pipe_num, pipe->usb_pipe_handle,
95 pipe->urb_alloc, pipe->urb_cnt);
96
97 if (pipe->urb_alloc != pipe->urb_cnt) {
98 ath10k_dbg(ar, ATH10K_DBG_USB,
99 "usb urb leak lpipe %d hpipe 0x%x urbs %d avail %d\n",
100 pipe->logical_pipe_num, pipe->usb_pipe_handle,
101 pipe->urb_alloc, pipe->urb_cnt);
102 }
103
104 for (;;) {
105 urb_context = ath10k_usb_alloc_urb_from_pipe(pipe);
106
107 if (!urb_context)
108 break;
109
110 kfree(urb_context);
111 }
112 }
113
ath10k_usb_cleanup_pipe_resources(struct ath10k * ar)114 static void ath10k_usb_cleanup_pipe_resources(struct ath10k *ar)
115 {
116 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
117 int i;
118
119 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++)
120 ath10k_usb_free_pipe_resources(ar, &ar_usb->pipes[i]);
121 }
122
123 /* hif usb rx/tx completion functions */
124
ath10k_usb_recv_complete(struct urb * urb)125 static void ath10k_usb_recv_complete(struct urb *urb)
126 {
127 struct ath10k_urb_context *urb_context = urb->context;
128 struct ath10k_usb_pipe *pipe = urb_context->pipe;
129 struct ath10k *ar = pipe->ar_usb->ar;
130 struct sk_buff *skb;
131 int status = 0;
132
133 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
134 "usb recv pipe %d stat %d len %d urb 0x%pK\n",
135 pipe->logical_pipe_num, urb->status, urb->actual_length,
136 urb);
137
138 if (urb->status != 0) {
139 status = -EIO;
140 switch (urb->status) {
141 case -ECONNRESET:
142 case -ENOENT:
143 case -ESHUTDOWN:
144 /* no need to spew these errors when device
145 * removed or urb killed due to driver shutdown
146 */
147 status = -ECANCELED;
148 break;
149 default:
150 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
151 "usb recv pipe %d ep 0x%2.2x failed: %d\n",
152 pipe->logical_pipe_num,
153 pipe->ep_address, urb->status);
154 break;
155 }
156 goto cleanup_recv_urb;
157 }
158
159 if (urb->actual_length == 0)
160 goto cleanup_recv_urb;
161
162 skb = urb_context->skb;
163
164 /* we are going to pass it up */
165 urb_context->skb = NULL;
166 skb_put(skb, urb->actual_length);
167
168 /* note: queue implements a lock */
169 skb_queue_tail(&pipe->io_comp_queue, skb);
170 schedule_work(&pipe->io_complete_work);
171
172 cleanup_recv_urb:
173 ath10k_usb_cleanup_recv_urb(urb_context);
174
175 if (status == 0 &&
176 pipe->urb_cnt >= pipe->urb_cnt_thresh) {
177 /* our free urbs are piling up, post more transfers */
178 ath10k_usb_post_recv_transfers(ar, pipe);
179 }
180 }
181
ath10k_usb_transmit_complete(struct urb * urb)182 static void ath10k_usb_transmit_complete(struct urb *urb)
183 {
184 struct ath10k_urb_context *urb_context = urb->context;
185 struct ath10k_usb_pipe *pipe = urb_context->pipe;
186 struct ath10k *ar = pipe->ar_usb->ar;
187 struct sk_buff *skb;
188
189 if (urb->status != 0) {
190 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
191 "pipe: %d, failed:%d\n",
192 pipe->logical_pipe_num, urb->status);
193 }
194
195 skb = urb_context->skb;
196 urb_context->skb = NULL;
197 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
198
199 /* note: queue implements a lock */
200 skb_queue_tail(&pipe->io_comp_queue, skb);
201 schedule_work(&pipe->io_complete_work);
202 }
203
204 /* pipe operations */
ath10k_usb_post_recv_transfers(struct ath10k * ar,struct ath10k_usb_pipe * recv_pipe)205 static void ath10k_usb_post_recv_transfers(struct ath10k *ar,
206 struct ath10k_usb_pipe *recv_pipe)
207 {
208 struct ath10k_urb_context *urb_context;
209 struct urb *urb;
210 int usb_status;
211
212 for (;;) {
213 urb_context = ath10k_usb_alloc_urb_from_pipe(recv_pipe);
214 if (!urb_context)
215 break;
216
217 urb_context->skb = dev_alloc_skb(ATH10K_USB_RX_BUFFER_SIZE);
218 if (!urb_context->skb)
219 goto err;
220
221 urb = usb_alloc_urb(0, GFP_ATOMIC);
222 if (!urb)
223 goto err;
224
225 usb_fill_bulk_urb(urb,
226 recv_pipe->ar_usb->udev,
227 recv_pipe->usb_pipe_handle,
228 urb_context->skb->data,
229 ATH10K_USB_RX_BUFFER_SIZE,
230 ath10k_usb_recv_complete, urb_context);
231
232 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
233 "usb bulk recv submit %d 0x%x ep 0x%2.2x len %d buf 0x%pK\n",
234 recv_pipe->logical_pipe_num,
235 recv_pipe->usb_pipe_handle, recv_pipe->ep_address,
236 ATH10K_USB_RX_BUFFER_SIZE, urb_context->skb);
237
238 usb_anchor_urb(urb, &recv_pipe->urb_submitted);
239 usb_status = usb_submit_urb(urb, GFP_ATOMIC);
240
241 if (usb_status) {
242 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
243 "usb bulk recv failed: %d\n",
244 usb_status);
245 usb_unanchor_urb(urb);
246 usb_free_urb(urb);
247 goto err;
248 }
249 usb_free_urb(urb);
250 }
251
252 return;
253
254 err:
255 ath10k_usb_cleanup_recv_urb(urb_context);
256 }
257
ath10k_usb_flush_all(struct ath10k * ar)258 static void ath10k_usb_flush_all(struct ath10k *ar)
259 {
260 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
261 int i;
262
263 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++) {
264 if (ar_usb->pipes[i].ar_usb) {
265 usb_kill_anchored_urbs(&ar_usb->pipes[i].urb_submitted);
266 cancel_work_sync(&ar_usb->pipes[i].io_complete_work);
267 }
268 }
269 }
270
ath10k_usb_start_recv_pipes(struct ath10k * ar)271 static void ath10k_usb_start_recv_pipes(struct ath10k *ar)
272 {
273 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
274
275 ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA].urb_cnt_thresh = 1;
276
277 ath10k_usb_post_recv_transfers(ar,
278 &ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA]);
279 }
280
ath10k_usb_tx_complete(struct ath10k * ar,struct sk_buff * skb)281 static void ath10k_usb_tx_complete(struct ath10k *ar, struct sk_buff *skb)
282 {
283 struct ath10k_htc_hdr *htc_hdr;
284 struct ath10k_htc_ep *ep;
285
286 htc_hdr = (struct ath10k_htc_hdr *)skb->data;
287 ep = &ar->htc.endpoint[htc_hdr->eid];
288 ath10k_htc_notify_tx_completion(ep, skb);
289 /* The TX complete handler now owns the skb... */
290 }
291
ath10k_usb_rx_complete(struct ath10k * ar,struct sk_buff * skb)292 static void ath10k_usb_rx_complete(struct ath10k *ar, struct sk_buff *skb)
293 {
294 struct ath10k_htc *htc = &ar->htc;
295 struct ath10k_htc_hdr *htc_hdr;
296 enum ath10k_htc_ep_id eid;
297 struct ath10k_htc_ep *ep;
298 u16 payload_len;
299 u8 *trailer;
300 int ret;
301
302 htc_hdr = (struct ath10k_htc_hdr *)skb->data;
303 eid = eid_from_htc_hdr(htc_hdr);
304 ep = &ar->htc.endpoint[eid];
305
306 if (ep->service_id == 0) {
307 ath10k_warn(ar, "ep %d is not connected\n", eid);
308 goto out_free_skb;
309 }
310
311 payload_len = le16_to_cpu(htc_hdr->len);
312 if (!payload_len) {
313 ath10k_warn(ar, "zero length frame received, firmware crashed?\n");
314 goto out_free_skb;
315 }
316
317 if (payload_len < htc_hdr->trailer_len) {
318 ath10k_warn(ar, "malformed frame received, firmware crashed?\n");
319 goto out_free_skb;
320 }
321
322 if (htc_hdr->flags & ATH10K_HTC_FLAG_TRAILER_PRESENT) {
323 trailer = skb->data + sizeof(*htc_hdr) + payload_len -
324 htc_hdr->trailer_len;
325
326 ret = ath10k_htc_process_trailer(htc,
327 trailer,
328 htc_hdr->trailer_len,
329 eid,
330 NULL,
331 NULL);
332 if (ret)
333 goto out_free_skb;
334
335 if (is_trailer_only_msg(htc_hdr))
336 goto out_free_skb;
337
338 /* strip off the trailer from the skb since it should not
339 * be passed on to upper layers
340 */
341 skb_trim(skb, skb->len - htc_hdr->trailer_len);
342 }
343
344 skb_pull(skb, sizeof(*htc_hdr));
345 ep->ep_ops.ep_rx_complete(ar, skb);
346 /* The RX complete handler now owns the skb... */
347
348 if (test_bit(ATH10K_FLAG_CORE_REGISTERED, &ar->dev_flags)) {
349 local_bh_disable();
350 napi_schedule(&ar->napi);
351 local_bh_enable();
352 }
353
354 return;
355
356 out_free_skb:
357 dev_kfree_skb(skb);
358 }
359
ath10k_usb_io_comp_work(struct work_struct * work)360 static void ath10k_usb_io_comp_work(struct work_struct *work)
361 {
362 struct ath10k_usb_pipe *pipe = container_of(work,
363 struct ath10k_usb_pipe,
364 io_complete_work);
365 struct ath10k *ar = pipe->ar_usb->ar;
366 struct sk_buff *skb;
367
368 while ((skb = skb_dequeue(&pipe->io_comp_queue))) {
369 if (pipe->flags & ATH10K_USB_PIPE_FLAG_TX)
370 ath10k_usb_tx_complete(ar, skb);
371 else
372 ath10k_usb_rx_complete(ar, skb);
373 }
374 }
375
376 #define ATH10K_USB_MAX_DIAG_CMD (sizeof(struct ath10k_usb_ctrl_diag_cmd_write))
377 #define ATH10K_USB_MAX_DIAG_RESP (sizeof(struct ath10k_usb_ctrl_diag_resp_read))
378
ath10k_usb_destroy(struct ath10k * ar)379 static void ath10k_usb_destroy(struct ath10k *ar)
380 {
381 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
382
383 ath10k_usb_flush_all(ar);
384 ath10k_usb_cleanup_pipe_resources(ar);
385 usb_set_intfdata(ar_usb->interface, NULL);
386
387 kfree(ar_usb->diag_cmd_buffer);
388 kfree(ar_usb->diag_resp_buffer);
389 }
390
ath10k_usb_hif_start(struct ath10k * ar)391 static int ath10k_usb_hif_start(struct ath10k *ar)
392 {
393 int i;
394 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
395
396 ath10k_core_napi_enable(ar);
397 ath10k_usb_start_recv_pipes(ar);
398
399 /* set the TX resource avail threshold for each TX pipe */
400 for (i = ATH10K_USB_PIPE_TX_CTRL;
401 i <= ATH10K_USB_PIPE_TX_DATA_HP; i++) {
402 ar_usb->pipes[i].urb_cnt_thresh =
403 ar_usb->pipes[i].urb_alloc / 2;
404 }
405
406 return 0;
407 }
408
ath10k_usb_hif_tx_sg(struct ath10k * ar,u8 pipe_id,struct ath10k_hif_sg_item * items,int n_items)409 static int ath10k_usb_hif_tx_sg(struct ath10k *ar, u8 pipe_id,
410 struct ath10k_hif_sg_item *items, int n_items)
411 {
412 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
413 struct ath10k_usb_pipe *pipe = &ar_usb->pipes[pipe_id];
414 struct ath10k_urb_context *urb_context;
415 struct sk_buff *skb;
416 struct urb *urb;
417 int ret, i;
418
419 for (i = 0; i < n_items; i++) {
420 urb_context = ath10k_usb_alloc_urb_from_pipe(pipe);
421 if (!urb_context) {
422 ret = -ENOMEM;
423 goto err;
424 }
425
426 skb = items[i].transfer_context;
427 urb_context->skb = skb;
428
429 urb = usb_alloc_urb(0, GFP_ATOMIC);
430 if (!urb) {
431 ret = -ENOMEM;
432 goto err_free_urb_to_pipe;
433 }
434
435 usb_fill_bulk_urb(urb,
436 ar_usb->udev,
437 pipe->usb_pipe_handle,
438 skb->data,
439 skb->len,
440 ath10k_usb_transmit_complete, urb_context);
441
442 if (!(skb->len % pipe->max_packet_size)) {
443 /* hit a max packet boundary on this pipe */
444 urb->transfer_flags |= URB_ZERO_PACKET;
445 }
446
447 usb_anchor_urb(urb, &pipe->urb_submitted);
448 ret = usb_submit_urb(urb, GFP_ATOMIC);
449 if (ret) {
450 ath10k_dbg(ar, ATH10K_DBG_USB_BULK,
451 "usb bulk transmit failed: %d\n", ret);
452 usb_unanchor_urb(urb);
453 usb_free_urb(urb);
454 ret = -EINVAL;
455 goto err_free_urb_to_pipe;
456 }
457
458 usb_free_urb(urb);
459 }
460
461 return 0;
462
463 err_free_urb_to_pipe:
464 ath10k_usb_free_urb_to_pipe(urb_context->pipe, urb_context);
465 err:
466 return ret;
467 }
468
ath10k_usb_hif_stop(struct ath10k * ar)469 static void ath10k_usb_hif_stop(struct ath10k *ar)
470 {
471 ath10k_usb_flush_all(ar);
472 ath10k_core_napi_sync_disable(ar);
473 }
474
ath10k_usb_hif_get_free_queue_number(struct ath10k * ar,u8 pipe_id)475 static u16 ath10k_usb_hif_get_free_queue_number(struct ath10k *ar, u8 pipe_id)
476 {
477 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
478
479 return ar_usb->pipes[pipe_id].urb_cnt;
480 }
481
ath10k_usb_submit_ctrl_out(struct ath10k * ar,u8 req,u16 value,u16 index,void * data,u32 size)482 static int ath10k_usb_submit_ctrl_out(struct ath10k *ar,
483 u8 req, u16 value, u16 index, void *data,
484 u32 size)
485 {
486 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
487 u8 *buf = NULL;
488 int ret;
489
490 if (size > 0) {
491 buf = kmemdup(data, size, GFP_KERNEL);
492 if (!buf)
493 return -ENOMEM;
494 }
495
496 /* note: if successful returns number of bytes transferred */
497 ret = usb_control_msg(ar_usb->udev,
498 usb_sndctrlpipe(ar_usb->udev, 0),
499 req,
500 USB_DIR_OUT | USB_TYPE_VENDOR |
501 USB_RECIP_DEVICE, value, index, buf,
502 size, 1000);
503
504 if (ret < 0) {
505 ath10k_warn(ar, "Failed to submit usb control message: %d\n",
506 ret);
507 kfree(buf);
508 return ret;
509 }
510
511 kfree(buf);
512
513 return 0;
514 }
515
ath10k_usb_submit_ctrl_in(struct ath10k * ar,u8 req,u16 value,u16 index,void * data,u32 size)516 static int ath10k_usb_submit_ctrl_in(struct ath10k *ar,
517 u8 req, u16 value, u16 index, void *data,
518 u32 size)
519 {
520 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
521 u8 *buf = NULL;
522 int ret;
523
524 if (size > 0) {
525 buf = kmalloc(size, GFP_KERNEL);
526 if (!buf)
527 return -ENOMEM;
528 }
529
530 /* note: if successful returns number of bytes transferred */
531 ret = usb_control_msg(ar_usb->udev,
532 usb_rcvctrlpipe(ar_usb->udev, 0),
533 req,
534 USB_DIR_IN | USB_TYPE_VENDOR |
535 USB_RECIP_DEVICE, value, index, buf,
536 size, 2000);
537
538 if (ret < 0) {
539 ath10k_warn(ar, "Failed to read usb control message: %d\n",
540 ret);
541 kfree(buf);
542 return ret;
543 }
544
545 memcpy((u8 *)data, buf, size);
546
547 kfree(buf);
548
549 return 0;
550 }
551
ath10k_usb_ctrl_msg_exchange(struct ath10k * ar,u8 req_val,u8 * req_buf,u32 req_len,u8 resp_val,u8 * resp_buf,u32 * resp_len)552 static int ath10k_usb_ctrl_msg_exchange(struct ath10k *ar,
553 u8 req_val, u8 *req_buf, u32 req_len,
554 u8 resp_val, u8 *resp_buf,
555 u32 *resp_len)
556 {
557 int ret;
558
559 /* send command */
560 ret = ath10k_usb_submit_ctrl_out(ar, req_val, 0, 0,
561 req_buf, req_len);
562 if (ret)
563 goto err;
564
565 /* get response */
566 if (resp_buf) {
567 ret = ath10k_usb_submit_ctrl_in(ar, resp_val, 0, 0,
568 resp_buf, *resp_len);
569 if (ret)
570 goto err;
571 }
572
573 return 0;
574 err:
575 return ret;
576 }
577
ath10k_usb_hif_diag_read(struct ath10k * ar,u32 address,void * buf,size_t buf_len)578 static int ath10k_usb_hif_diag_read(struct ath10k *ar, u32 address, void *buf,
579 size_t buf_len)
580 {
581 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
582 struct ath10k_usb_ctrl_diag_cmd_read *cmd;
583 u32 resp_len;
584 int ret;
585
586 if (buf_len < sizeof(struct ath10k_usb_ctrl_diag_resp_read))
587 return -EINVAL;
588
589 cmd = (struct ath10k_usb_ctrl_diag_cmd_read *)ar_usb->diag_cmd_buffer;
590 memset(cmd, 0, sizeof(*cmd));
591 cmd->cmd = ATH10K_USB_CTRL_DIAG_CC_READ;
592 cmd->address = cpu_to_le32(address);
593 resp_len = sizeof(struct ath10k_usb_ctrl_diag_resp_read);
594
595 ret = ath10k_usb_ctrl_msg_exchange(ar,
596 ATH10K_USB_CONTROL_REQ_DIAG_CMD,
597 (u8 *)cmd,
598 sizeof(*cmd),
599 ATH10K_USB_CONTROL_REQ_DIAG_RESP,
600 ar_usb->diag_resp_buffer, &resp_len);
601 if (ret)
602 return ret;
603
604 if (resp_len != sizeof(struct ath10k_usb_ctrl_diag_resp_read))
605 return -EMSGSIZE;
606
607 memcpy(buf, ar_usb->diag_resp_buffer,
608 sizeof(struct ath10k_usb_ctrl_diag_resp_read));
609
610 return 0;
611 }
612
ath10k_usb_hif_diag_write(struct ath10k * ar,u32 address,const void * data,int nbytes)613 static int ath10k_usb_hif_diag_write(struct ath10k *ar, u32 address,
614 const void *data, int nbytes)
615 {
616 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
617 struct ath10k_usb_ctrl_diag_cmd_write *cmd;
618 int ret;
619
620 if (nbytes != sizeof(cmd->value))
621 return -EINVAL;
622
623 cmd = (struct ath10k_usb_ctrl_diag_cmd_write *)ar_usb->diag_cmd_buffer;
624 memset(cmd, 0, sizeof(*cmd));
625 cmd->cmd = cpu_to_le32(ATH10K_USB_CTRL_DIAG_CC_WRITE);
626 cmd->address = cpu_to_le32(address);
627 memcpy(&cmd->value, data, nbytes);
628
629 ret = ath10k_usb_ctrl_msg_exchange(ar,
630 ATH10K_USB_CONTROL_REQ_DIAG_CMD,
631 (u8 *)cmd,
632 sizeof(*cmd),
633 0, NULL, NULL);
634 if (ret)
635 return ret;
636
637 return 0;
638 }
639
ath10k_usb_bmi_exchange_msg(struct ath10k * ar,void * req,u32 req_len,void * resp,u32 * resp_len)640 static int ath10k_usb_bmi_exchange_msg(struct ath10k *ar,
641 void *req, u32 req_len,
642 void *resp, u32 *resp_len)
643 {
644 int ret;
645
646 if (req) {
647 ret = ath10k_usb_submit_ctrl_out(ar,
648 ATH10K_USB_CONTROL_REQ_SEND_BMI_CMD,
649 0, 0, req, req_len);
650 if (ret) {
651 ath10k_warn(ar,
652 "unable to send the bmi data to the device: %d\n",
653 ret);
654 return ret;
655 }
656 }
657
658 if (resp) {
659 ret = ath10k_usb_submit_ctrl_in(ar,
660 ATH10K_USB_CONTROL_REQ_RECV_BMI_RESP,
661 0, 0, resp, *resp_len);
662 if (ret) {
663 ath10k_warn(ar,
664 "Unable to read the bmi data from the device: %d\n",
665 ret);
666 return ret;
667 }
668 }
669
670 return 0;
671 }
672
ath10k_usb_hif_get_default_pipe(struct ath10k * ar,u8 * ul_pipe,u8 * dl_pipe)673 static void ath10k_usb_hif_get_default_pipe(struct ath10k *ar,
674 u8 *ul_pipe, u8 *dl_pipe)
675 {
676 *ul_pipe = ATH10K_USB_PIPE_TX_CTRL;
677 *dl_pipe = ATH10K_USB_PIPE_RX_CTRL;
678 }
679
ath10k_usb_hif_map_service_to_pipe(struct ath10k * ar,u16 svc_id,u8 * ul_pipe,u8 * dl_pipe)680 static int ath10k_usb_hif_map_service_to_pipe(struct ath10k *ar, u16 svc_id,
681 u8 *ul_pipe, u8 *dl_pipe)
682 {
683 switch (svc_id) {
684 case ATH10K_HTC_SVC_ID_RSVD_CTRL:
685 case ATH10K_HTC_SVC_ID_WMI_CONTROL:
686 *ul_pipe = ATH10K_USB_PIPE_TX_CTRL;
687 /* due to large control packets, shift to data pipe */
688 *dl_pipe = ATH10K_USB_PIPE_RX_DATA;
689 break;
690 case ATH10K_HTC_SVC_ID_HTT_DATA_MSG:
691 *ul_pipe = ATH10K_USB_PIPE_TX_DATA_LP;
692 /* Disable rxdata2 directly, it will be enabled
693 * if FW enable rxdata2
694 */
695 *dl_pipe = ATH10K_USB_PIPE_RX_DATA;
696 break;
697 default:
698 return -EPERM;
699 }
700
701 return 0;
702 }
703
ath10k_usb_hif_power_up(struct ath10k * ar,enum ath10k_firmware_mode fw_mode)704 static int ath10k_usb_hif_power_up(struct ath10k *ar,
705 enum ath10k_firmware_mode fw_mode)
706 {
707 return 0;
708 }
709
ath10k_usb_hif_power_down(struct ath10k * ar)710 static void ath10k_usb_hif_power_down(struct ath10k *ar)
711 {
712 ath10k_usb_flush_all(ar);
713 }
714
715 #ifdef CONFIG_PM
716
ath10k_usb_hif_suspend(struct ath10k * ar)717 static int ath10k_usb_hif_suspend(struct ath10k *ar)
718 {
719 return -EOPNOTSUPP;
720 }
721
ath10k_usb_hif_resume(struct ath10k * ar)722 static int ath10k_usb_hif_resume(struct ath10k *ar)
723 {
724 return -EOPNOTSUPP;
725 }
726 #endif
727
728 static const struct ath10k_hif_ops ath10k_usb_hif_ops = {
729 .tx_sg = ath10k_usb_hif_tx_sg,
730 .diag_read = ath10k_usb_hif_diag_read,
731 .diag_write = ath10k_usb_hif_diag_write,
732 .exchange_bmi_msg = ath10k_usb_bmi_exchange_msg,
733 .start = ath10k_usb_hif_start,
734 .stop = ath10k_usb_hif_stop,
735 .map_service_to_pipe = ath10k_usb_hif_map_service_to_pipe,
736 .get_default_pipe = ath10k_usb_hif_get_default_pipe,
737 .get_free_queue_number = ath10k_usb_hif_get_free_queue_number,
738 .power_up = ath10k_usb_hif_power_up,
739 .power_down = ath10k_usb_hif_power_down,
740 #ifdef CONFIG_PM
741 .suspend = ath10k_usb_hif_suspend,
742 .resume = ath10k_usb_hif_resume,
743 #endif
744 };
745
ath10k_usb_get_logical_pipe_num(u8 ep_address,int * urb_count)746 static u8 ath10k_usb_get_logical_pipe_num(u8 ep_address, int *urb_count)
747 {
748 u8 pipe_num = ATH10K_USB_PIPE_INVALID;
749
750 switch (ep_address) {
751 case ATH10K_USB_EP_ADDR_APP_CTRL_IN:
752 pipe_num = ATH10K_USB_PIPE_RX_CTRL;
753 *urb_count = RX_URB_COUNT;
754 break;
755 case ATH10K_USB_EP_ADDR_APP_DATA_IN:
756 pipe_num = ATH10K_USB_PIPE_RX_DATA;
757 *urb_count = RX_URB_COUNT;
758 break;
759 case ATH10K_USB_EP_ADDR_APP_INT_IN:
760 pipe_num = ATH10K_USB_PIPE_RX_INT;
761 *urb_count = RX_URB_COUNT;
762 break;
763 case ATH10K_USB_EP_ADDR_APP_DATA2_IN:
764 pipe_num = ATH10K_USB_PIPE_RX_DATA2;
765 *urb_count = RX_URB_COUNT;
766 break;
767 case ATH10K_USB_EP_ADDR_APP_CTRL_OUT:
768 pipe_num = ATH10K_USB_PIPE_TX_CTRL;
769 *urb_count = TX_URB_COUNT;
770 break;
771 case ATH10K_USB_EP_ADDR_APP_DATA_LP_OUT:
772 pipe_num = ATH10K_USB_PIPE_TX_DATA_LP;
773 *urb_count = TX_URB_COUNT;
774 break;
775 case ATH10K_USB_EP_ADDR_APP_DATA_MP_OUT:
776 pipe_num = ATH10K_USB_PIPE_TX_DATA_MP;
777 *urb_count = TX_URB_COUNT;
778 break;
779 case ATH10K_USB_EP_ADDR_APP_DATA_HP_OUT:
780 pipe_num = ATH10K_USB_PIPE_TX_DATA_HP;
781 *urb_count = TX_URB_COUNT;
782 break;
783 default:
784 /* note: there may be endpoints not currently used */
785 break;
786 }
787
788 return pipe_num;
789 }
790
ath10k_usb_alloc_pipe_resources(struct ath10k * ar,struct ath10k_usb_pipe * pipe,int urb_cnt)791 static int ath10k_usb_alloc_pipe_resources(struct ath10k *ar,
792 struct ath10k_usb_pipe *pipe,
793 int urb_cnt)
794 {
795 struct ath10k_urb_context *urb_context;
796 int i;
797
798 INIT_LIST_HEAD(&pipe->urb_list_head);
799 init_usb_anchor(&pipe->urb_submitted);
800
801 for (i = 0; i < urb_cnt; i++) {
802 urb_context = kzalloc(sizeof(*urb_context), GFP_KERNEL);
803 if (!urb_context)
804 return -ENOMEM;
805
806 urb_context->pipe = pipe;
807
808 /* we are only allocate the urb contexts here, the actual URB
809 * is allocated from the kernel as needed to do a transaction
810 */
811 pipe->urb_alloc++;
812 ath10k_usb_free_urb_to_pipe(pipe, urb_context);
813 }
814
815 ath10k_dbg(ar, ATH10K_DBG_USB,
816 "usb alloc resources lpipe %d hpipe 0x%x urbs %d\n",
817 pipe->logical_pipe_num, pipe->usb_pipe_handle,
818 pipe->urb_alloc);
819
820 return 0;
821 }
822
ath10k_usb_setup_pipe_resources(struct ath10k * ar,struct usb_interface * interface)823 static int ath10k_usb_setup_pipe_resources(struct ath10k *ar,
824 struct usb_interface *interface)
825 {
826 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
827 struct usb_host_interface *iface_desc = interface->cur_altsetting;
828 struct usb_endpoint_descriptor *endpoint;
829 struct ath10k_usb_pipe *pipe;
830 int ret, i, urbcount;
831 u8 pipe_num;
832
833 ath10k_dbg(ar, ATH10K_DBG_USB, "usb setting up pipes using interface\n");
834
835 /* walk descriptors and setup pipes */
836 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
837 endpoint = &iface_desc->endpoint[i].desc;
838
839 if (ATH10K_USB_IS_BULK_EP(endpoint->bmAttributes)) {
840 ath10k_dbg(ar, ATH10K_DBG_USB,
841 "usb %s bulk ep 0x%2.2x maxpktsz %d\n",
842 ATH10K_USB_IS_DIR_IN
843 (endpoint->bEndpointAddress) ?
844 "rx" : "tx", endpoint->bEndpointAddress,
845 le16_to_cpu(endpoint->wMaxPacketSize));
846 } else if (ATH10K_USB_IS_INT_EP(endpoint->bmAttributes)) {
847 ath10k_dbg(ar, ATH10K_DBG_USB,
848 "usb %s int ep 0x%2.2x maxpktsz %d interval %d\n",
849 ATH10K_USB_IS_DIR_IN
850 (endpoint->bEndpointAddress) ?
851 "rx" : "tx", endpoint->bEndpointAddress,
852 le16_to_cpu(endpoint->wMaxPacketSize),
853 endpoint->bInterval);
854 } else if (ATH10K_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
855 /* TODO for ISO */
856 ath10k_dbg(ar, ATH10K_DBG_USB,
857 "usb %s isoc ep 0x%2.2x maxpktsz %d interval %d\n",
858 ATH10K_USB_IS_DIR_IN
859 (endpoint->bEndpointAddress) ?
860 "rx" : "tx", endpoint->bEndpointAddress,
861 le16_to_cpu(endpoint->wMaxPacketSize),
862 endpoint->bInterval);
863 }
864
865 /* Ignore broken descriptors. */
866 if (usb_endpoint_maxp(endpoint) == 0)
867 continue;
868
869 urbcount = 0;
870
871 pipe_num =
872 ath10k_usb_get_logical_pipe_num(endpoint->bEndpointAddress,
873 &urbcount);
874 if (pipe_num == ATH10K_USB_PIPE_INVALID)
875 continue;
876
877 pipe = &ar_usb->pipes[pipe_num];
878 if (pipe->ar_usb)
879 /* hmmm..pipe was already setup */
880 continue;
881
882 pipe->ar_usb = ar_usb;
883 pipe->logical_pipe_num = pipe_num;
884 pipe->ep_address = endpoint->bEndpointAddress;
885 pipe->max_packet_size = le16_to_cpu(endpoint->wMaxPacketSize);
886
887 if (ATH10K_USB_IS_BULK_EP(endpoint->bmAttributes)) {
888 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) {
889 pipe->usb_pipe_handle =
890 usb_rcvbulkpipe(ar_usb->udev,
891 pipe->ep_address);
892 } else {
893 pipe->usb_pipe_handle =
894 usb_sndbulkpipe(ar_usb->udev,
895 pipe->ep_address);
896 }
897 } else if (ATH10K_USB_IS_INT_EP(endpoint->bmAttributes)) {
898 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) {
899 pipe->usb_pipe_handle =
900 usb_rcvintpipe(ar_usb->udev,
901 pipe->ep_address);
902 } else {
903 pipe->usb_pipe_handle =
904 usb_sndintpipe(ar_usb->udev,
905 pipe->ep_address);
906 }
907 } else if (ATH10K_USB_IS_ISOC_EP(endpoint->bmAttributes)) {
908 /* TODO for ISO */
909 if (ATH10K_USB_IS_DIR_IN(pipe->ep_address)) {
910 pipe->usb_pipe_handle =
911 usb_rcvisocpipe(ar_usb->udev,
912 pipe->ep_address);
913 } else {
914 pipe->usb_pipe_handle =
915 usb_sndisocpipe(ar_usb->udev,
916 pipe->ep_address);
917 }
918 }
919
920 pipe->ep_desc = endpoint;
921
922 if (!ATH10K_USB_IS_DIR_IN(pipe->ep_address))
923 pipe->flags |= ATH10K_USB_PIPE_FLAG_TX;
924
925 ret = ath10k_usb_alloc_pipe_resources(ar, pipe, urbcount);
926 if (ret)
927 return ret;
928 }
929
930 return 0;
931 }
932
ath10k_usb_create(struct ath10k * ar,struct usb_interface * interface)933 static int ath10k_usb_create(struct ath10k *ar,
934 struct usb_interface *interface)
935 {
936 struct ath10k_usb *ar_usb = ath10k_usb_priv(ar);
937 struct usb_device *dev = interface_to_usbdev(interface);
938 struct ath10k_usb_pipe *pipe;
939 int ret, i;
940
941 usb_set_intfdata(interface, ar_usb);
942 spin_lock_init(&ar_usb->cs_lock);
943 ar_usb->udev = dev;
944 ar_usb->interface = interface;
945
946 for (i = 0; i < ATH10K_USB_PIPE_MAX; i++) {
947 pipe = &ar_usb->pipes[i];
948 INIT_WORK(&pipe->io_complete_work,
949 ath10k_usb_io_comp_work);
950 skb_queue_head_init(&pipe->io_comp_queue);
951 }
952
953 ar_usb->diag_cmd_buffer = kzalloc(ATH10K_USB_MAX_DIAG_CMD, GFP_KERNEL);
954 if (!ar_usb->diag_cmd_buffer) {
955 ret = -ENOMEM;
956 goto err;
957 }
958
959 ar_usb->diag_resp_buffer = kzalloc(ATH10K_USB_MAX_DIAG_RESP,
960 GFP_KERNEL);
961 if (!ar_usb->diag_resp_buffer) {
962 ret = -ENOMEM;
963 goto err;
964 }
965
966 ret = ath10k_usb_setup_pipe_resources(ar, interface);
967 if (ret)
968 goto err;
969
970 return 0;
971
972 err:
973 ath10k_usb_destroy(ar);
974 return ret;
975 }
976
ath10k_usb_napi_poll(struct napi_struct * ctx,int budget)977 static int ath10k_usb_napi_poll(struct napi_struct *ctx, int budget)
978 {
979 struct ath10k *ar = container_of(ctx, struct ath10k, napi);
980 int done;
981
982 done = ath10k_htt_rx_hl_indication(ar, budget);
983 ath10k_dbg(ar, ATH10K_DBG_USB, "napi poll: done: %d, budget:%d\n", done, budget);
984
985 if (done < budget)
986 napi_complete_done(ctx, done);
987
988 return done;
989 }
990
991 /* ath10k usb driver registered functions */
ath10k_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)992 static int ath10k_usb_probe(struct usb_interface *interface,
993 const struct usb_device_id *id)
994 {
995 struct ath10k *ar;
996 struct ath10k_usb *ar_usb;
997 struct usb_device *dev = interface_to_usbdev(interface);
998 int ret, vendor_id, product_id;
999 enum ath10k_hw_rev hw_rev;
1000 struct ath10k_bus_params bus_params = {};
1001
1002 /* Assumption: All USB based chipsets (so far) are QCA9377 based.
1003 * If there will be newer chipsets that does not use the hw reg
1004 * setup as defined in qca6174_regs and qca6174_values, this
1005 * assumption is no longer valid and hw_rev must be setup differently
1006 * depending on chipset.
1007 */
1008 hw_rev = ATH10K_HW_QCA9377;
1009
1010 ar = ath10k_core_create(sizeof(*ar_usb), &dev->dev, ATH10K_BUS_USB,
1011 hw_rev, &ath10k_usb_hif_ops);
1012 if (!ar) {
1013 dev_err(&dev->dev, "failed to allocate core\n");
1014 return -ENOMEM;
1015 }
1016
1017 netif_napi_add(&ar->napi_dev, &ar->napi, ath10k_usb_napi_poll);
1018
1019 usb_get_dev(dev);
1020 vendor_id = le16_to_cpu(dev->descriptor.idVendor);
1021 product_id = le16_to_cpu(dev->descriptor.idProduct);
1022
1023 ath10k_dbg(ar, ATH10K_DBG_BOOT,
1024 "usb new func vendor 0x%04x product 0x%04x\n",
1025 vendor_id, product_id);
1026
1027 ar_usb = ath10k_usb_priv(ar);
1028 ret = ath10k_usb_create(ar, interface);
1029 if (ret)
1030 goto err;
1031 ar_usb->ar = ar;
1032
1033 ar->dev_id = product_id;
1034 ar->id.vendor = vendor_id;
1035 ar->id.device = product_id;
1036
1037 bus_params.dev_type = ATH10K_DEV_TYPE_HL;
1038 /* TODO: don't know yet how to get chip_id with USB */
1039 bus_params.chip_id = 0;
1040 bus_params.hl_msdu_ids = true;
1041 ret = ath10k_core_register(ar, &bus_params);
1042 if (ret) {
1043 ath10k_warn(ar, "failed to register driver core: %d\n", ret);
1044 goto err_usb_destroy;
1045 }
1046
1047 /* TODO: remove this once USB support is fully implemented */
1048 ath10k_warn(ar, "Warning: ath10k USB support is incomplete, don't expect anything to work!\n");
1049
1050 return 0;
1051
1052 err_usb_destroy:
1053 ath10k_usb_destroy(ar);
1054
1055 err:
1056 ath10k_core_destroy(ar);
1057
1058 usb_put_dev(dev);
1059
1060 return ret;
1061 }
1062
ath10k_usb_remove(struct usb_interface * interface)1063 static void ath10k_usb_remove(struct usb_interface *interface)
1064 {
1065 struct ath10k_usb *ar_usb;
1066
1067 ar_usb = usb_get_intfdata(interface);
1068 if (!ar_usb)
1069 return;
1070
1071 ath10k_core_unregister(ar_usb->ar);
1072 netif_napi_del(&ar_usb->ar->napi);
1073 ath10k_usb_destroy(ar_usb->ar);
1074 usb_put_dev(interface_to_usbdev(interface));
1075 ath10k_core_destroy(ar_usb->ar);
1076 }
1077
1078 #ifdef CONFIG_PM
1079
ath10k_usb_pm_suspend(struct usb_interface * interface,pm_message_t message)1080 static int ath10k_usb_pm_suspend(struct usb_interface *interface,
1081 pm_message_t message)
1082 {
1083 struct ath10k_usb *ar_usb = usb_get_intfdata(interface);
1084
1085 ath10k_usb_flush_all(ar_usb->ar);
1086 return 0;
1087 }
1088
ath10k_usb_pm_resume(struct usb_interface * interface)1089 static int ath10k_usb_pm_resume(struct usb_interface *interface)
1090 {
1091 struct ath10k_usb *ar_usb = usb_get_intfdata(interface);
1092 struct ath10k *ar = ar_usb->ar;
1093
1094 ath10k_usb_post_recv_transfers(ar,
1095 &ar_usb->pipes[ATH10K_USB_PIPE_RX_DATA]);
1096
1097 return 0;
1098 }
1099
1100 #else
1101
1102 #define ath10k_usb_pm_suspend NULL
1103 #define ath10k_usb_pm_resume NULL
1104
1105 #endif
1106
1107 /* table of devices that work with this driver */
1108 static struct usb_device_id ath10k_usb_ids[] = {
1109 {USB_DEVICE(0x13b1, 0x0042)}, /* Linksys WUSB6100M */
1110 { /* Terminating entry */ },
1111 };
1112
1113 MODULE_DEVICE_TABLE(usb, ath10k_usb_ids);
1114
1115 static struct usb_driver ath10k_usb_driver = {
1116 .name = "ath10k_usb",
1117 .probe = ath10k_usb_probe,
1118 .suspend = ath10k_usb_pm_suspend,
1119 .resume = ath10k_usb_pm_resume,
1120 .disconnect = ath10k_usb_remove,
1121 .id_table = ath10k_usb_ids,
1122 .supports_autosuspend = true,
1123 .disable_hub_initiated_lpm = 1,
1124 };
1125
1126 module_usb_driver(ath10k_usb_driver);
1127
1128 MODULE_AUTHOR("Atheros Communications, Inc.");
1129 MODULE_DESCRIPTION("Driver support for Qualcomm Atheros USB 802.11ac WLAN devices");
1130 MODULE_LICENSE("Dual BSD/GPL");
1131