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17#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
18
19#include "htc.h"
20
21static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
22 u16 len, u8 flags, u8 epid)
23
24{
25 struct htc_frame_hdr *hdr;
26 struct htc_endpoint *endpoint = &target->endpoint[epid];
27 int status;
28
29 hdr = skb_push(skb, sizeof(struct htc_frame_hdr));
30 hdr->endpoint_id = epid;
31 hdr->flags = flags;
32 hdr->payload_len = cpu_to_be16(len);
33
34 status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb);
35
36 return status;
37}
38
39static struct htc_endpoint *get_next_avail_ep(struct htc_endpoint *endpoint)
40{
41 enum htc_endpoint_id avail_epid;
42
43 for (avail_epid = (ENDPOINT_MAX - 1); avail_epid > ENDPOINT0; avail_epid--)
44 if (endpoint[avail_epid].service_id == 0)
45 return &endpoint[avail_epid];
46 return NULL;
47}
48
49static u8 service_to_ulpipe(u16 service_id)
50{
51 switch (service_id) {
52 case WMI_CONTROL_SVC:
53 return 4;
54 case WMI_BEACON_SVC:
55 case WMI_CAB_SVC:
56 case WMI_UAPSD_SVC:
57 case WMI_MGMT_SVC:
58 case WMI_DATA_VO_SVC:
59 case WMI_DATA_VI_SVC:
60 case WMI_DATA_BE_SVC:
61 case WMI_DATA_BK_SVC:
62 return 1;
63 default:
64 return 0;
65 }
66}
67
68static u8 service_to_dlpipe(u16 service_id)
69{
70 switch (service_id) {
71 case WMI_CONTROL_SVC:
72 return 3;
73 case WMI_BEACON_SVC:
74 case WMI_CAB_SVC:
75 case WMI_UAPSD_SVC:
76 case WMI_MGMT_SVC:
77 case WMI_DATA_VO_SVC:
78 case WMI_DATA_VI_SVC:
79 case WMI_DATA_BE_SVC:
80 case WMI_DATA_BK_SVC:
81 return 2;
82 default:
83 return 0;
84 }
85}
86
87static void htc_process_target_rdy(struct htc_target *target,
88 void *buf)
89{
90 struct htc_endpoint *endpoint;
91 struct htc_ready_msg *htc_ready_msg = (struct htc_ready_msg *) buf;
92
93 target->credit_size = be16_to_cpu(htc_ready_msg->credit_size);
94
95 endpoint = &target->endpoint[ENDPOINT0];
96 endpoint->service_id = HTC_CTRL_RSVD_SVC;
97 endpoint->max_msglen = HTC_MAX_CONTROL_MESSAGE_LENGTH;
98 atomic_inc(&target->tgt_ready);
99 complete(&target->target_wait);
100}
101
102static void htc_process_conn_rsp(struct htc_target *target,
103 struct htc_frame_hdr *htc_hdr)
104{
105 struct htc_conn_svc_rspmsg *svc_rspmsg;
106 struct htc_endpoint *endpoint, *tmp_endpoint = NULL;
107 u16 service_id;
108 u16 max_msglen;
109 enum htc_endpoint_id epid, tepid;
110
111 svc_rspmsg = (struct htc_conn_svc_rspmsg *)
112 ((void *) htc_hdr + sizeof(struct htc_frame_hdr));
113
114 if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) {
115 epid = svc_rspmsg->endpoint_id;
116 if (epid < 0 || epid >= ENDPOINT_MAX)
117 return;
118
119 service_id = be16_to_cpu(svc_rspmsg->service_id);
120 max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len);
121 endpoint = &target->endpoint[epid];
122
123 for (tepid = (ENDPOINT_MAX - 1); tepid > ENDPOINT0; tepid--) {
124 tmp_endpoint = &target->endpoint[tepid];
125 if (tmp_endpoint->service_id == service_id) {
126 tmp_endpoint->service_id = 0;
127 break;
128 }
129 }
130
131 if (tepid == ENDPOINT0)
132 return;
133
134 endpoint->service_id = service_id;
135 endpoint->max_txqdepth = tmp_endpoint->max_txqdepth;
136 endpoint->ep_callbacks = tmp_endpoint->ep_callbacks;
137 endpoint->ul_pipeid = tmp_endpoint->ul_pipeid;
138 endpoint->dl_pipeid = tmp_endpoint->dl_pipeid;
139 endpoint->max_msglen = max_msglen;
140 target->conn_rsp_epid = epid;
141 complete(&target->cmd_wait);
142 } else {
143 target->conn_rsp_epid = ENDPOINT_UNUSED;
144 }
145}
146
147static int htc_config_pipe_credits(struct htc_target *target)
148{
149 struct sk_buff *skb;
150 struct htc_config_pipe_msg *cp_msg;
151 int ret;
152 unsigned long time_left;
153
154 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
155 if (!skb) {
156 dev_err(target->dev, "failed to allocate send buffer\n");
157 return -ENOMEM;
158 }
159 skb_reserve(skb, sizeof(struct htc_frame_hdr));
160
161 cp_msg = skb_put(skb, sizeof(struct htc_config_pipe_msg));
162
163 cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID);
164 cp_msg->pipe_id = USB_WLAN_TX_PIPE;
165 cp_msg->credits = target->credits;
166
167 target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
168
169 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
170 if (ret)
171 goto err;
172
173 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
174 if (!time_left) {
175 dev_err(target->dev, "HTC credit config timeout\n");
176 return -ETIMEDOUT;
177 }
178
179 return 0;
180err:
181 kfree_skb(skb);
182 return -EINVAL;
183}
184
185static int htc_setup_complete(struct htc_target *target)
186{
187 struct sk_buff *skb;
188 struct htc_comp_msg *comp_msg;
189 int ret = 0;
190 unsigned long time_left;
191
192 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
193 if (!skb) {
194 dev_err(target->dev, "failed to allocate send buffer\n");
195 return -ENOMEM;
196 }
197 skb_reserve(skb, sizeof(struct htc_frame_hdr));
198
199 comp_msg = skb_put(skb, sizeof(struct htc_comp_msg));
200 comp_msg->msg_id = cpu_to_be16(HTC_MSG_SETUP_COMPLETE_ID);
201
202 target->htc_flags |= HTC_OP_START_WAIT;
203
204 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
205 if (ret)
206 goto err;
207
208 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
209 if (!time_left) {
210 dev_err(target->dev, "HTC start timeout\n");
211 return -ETIMEDOUT;
212 }
213
214 return 0;
215
216err:
217 kfree_skb(skb);
218 return -EINVAL;
219}
220
221
222
223int htc_init(struct htc_target *target)
224{
225 int ret;
226
227 ret = htc_config_pipe_credits(target);
228 if (ret)
229 return ret;
230
231 return htc_setup_complete(target);
232}
233
234int htc_connect_service(struct htc_target *target,
235 struct htc_service_connreq *service_connreq,
236 enum htc_endpoint_id *conn_rsp_epid)
237{
238 struct sk_buff *skb;
239 struct htc_endpoint *endpoint;
240 struct htc_conn_svc_msg *conn_msg;
241 int ret;
242 unsigned long time_left;
243
244
245 endpoint = get_next_avail_ep(target->endpoint);
246 if (!endpoint) {
247 dev_err(target->dev, "Endpoint is not available for service %d\n",
248 service_connreq->service_id);
249 return -EINVAL;
250 }
251
252 endpoint->service_id = service_connreq->service_id;
253 endpoint->max_txqdepth = service_connreq->max_send_qdepth;
254 endpoint->ul_pipeid = service_to_ulpipe(service_connreq->service_id);
255 endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id);
256 endpoint->ep_callbacks = service_connreq->ep_callbacks;
257
258 skb = alloc_skb(sizeof(struct htc_conn_svc_msg) +
259 sizeof(struct htc_frame_hdr), GFP_ATOMIC);
260 if (!skb) {
261 dev_err(target->dev, "Failed to allocate buf to send"
262 "service connect req\n");
263 return -ENOMEM;
264 }
265
266 skb_reserve(skb, sizeof(struct htc_frame_hdr));
267
268 conn_msg = skb_put(skb, sizeof(struct htc_conn_svc_msg));
269 conn_msg->service_id = cpu_to_be16(service_connreq->service_id);
270 conn_msg->msg_id = cpu_to_be16(HTC_MSG_CONNECT_SERVICE_ID);
271 conn_msg->con_flags = cpu_to_be16(service_connreq->con_flags);
272 conn_msg->dl_pipeid = endpoint->dl_pipeid;
273 conn_msg->ul_pipeid = endpoint->ul_pipeid;
274
275 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
276 if (ret)
277 goto err;
278
279 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
280 if (!time_left) {
281 dev_err(target->dev, "Service connection timeout for: %d\n",
282 service_connreq->service_id);
283 return -ETIMEDOUT;
284 }
285
286 *conn_rsp_epid = target->conn_rsp_epid;
287 return 0;
288err:
289 kfree_skb(skb);
290 return ret;
291}
292
293int htc_send(struct htc_target *target, struct sk_buff *skb)
294{
295 struct ath9k_htc_tx_ctl *tx_ctl;
296
297 tx_ctl = HTC_SKB_CB(skb);
298 return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
299}
300
301int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
302 enum htc_endpoint_id epid)
303{
304 return htc_issue_send(target, skb, skb->len, 0, epid);
305}
306
307void htc_stop(struct htc_target *target)
308{
309 target->hif->stop(target->hif_dev);
310}
311
312void htc_start(struct htc_target *target)
313{
314 target->hif->start(target->hif_dev);
315}
316
317void htc_sta_drain(struct htc_target *target, u8 idx)
318{
319 target->hif->sta_drain(target->hif_dev, idx);
320}
321
322void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
323 struct sk_buff *skb, bool txok)
324{
325 struct htc_endpoint *endpoint;
326 struct htc_frame_hdr *htc_hdr = NULL;
327
328 if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
329 complete(&htc_handle->cmd_wait);
330 htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
331 goto ret;
332 }
333
334 if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
335 complete(&htc_handle->cmd_wait);
336 htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
337 goto ret;
338 }
339
340 if (skb) {
341 htc_hdr = (struct htc_frame_hdr *) skb->data;
342 if (htc_hdr->endpoint_id >= ARRAY_SIZE(htc_handle->endpoint))
343 goto ret;
344 endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id];
345 skb_pull(skb, sizeof(struct htc_frame_hdr));
346
347 if (endpoint->ep_callbacks.tx) {
348 endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
349 skb, htc_hdr->endpoint_id,
350 txok);
351 } else {
352 kfree_skb(skb);
353 }
354 }
355
356 return;
357ret:
358 kfree_skb(skb);
359}
360
361static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle,
362 struct sk_buff *skb)
363{
364 uint32_t *pattern = (uint32_t *)skb->data;
365
366 switch (*pattern) {
367 case 0x33221199:
368 {
369 struct htc_panic_bad_vaddr *htc_panic;
370 htc_panic = (struct htc_panic_bad_vaddr *) skb->data;
371 dev_err(htc_handle->dev, "ath: firmware panic! "
372 "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n",
373 htc_panic->exccause, htc_panic->pc,
374 htc_panic->badvaddr);
375 break;
376 }
377 case 0x33221299:
378 {
379 struct htc_panic_bad_epid *htc_panic;
380 htc_panic = (struct htc_panic_bad_epid *) skb->data;
381 dev_err(htc_handle->dev, "ath: firmware panic! "
382 "bad epid: 0x%08x\n", htc_panic->epid);
383 break;
384 }
385 default:
386 dev_err(htc_handle->dev, "ath: unknown panic pattern!\n");
387 break;
388 }
389}
390
391
392
393
394
395
396
397
398void ath9k_htc_rx_msg(struct htc_target *htc_handle,
399 struct sk_buff *skb, u32 len, u8 pipe_id)
400{
401 struct htc_frame_hdr *htc_hdr;
402 enum htc_endpoint_id epid;
403 struct htc_endpoint *endpoint;
404 __be16 *msg_id;
405
406 if (!htc_handle || !skb)
407 return;
408
409 htc_hdr = (struct htc_frame_hdr *) skb->data;
410 epid = htc_hdr->endpoint_id;
411
412 if (epid == 0x99) {
413 ath9k_htc_fw_panic_report(htc_handle, skb);
414 kfree_skb(skb);
415 return;
416 }
417
418 if (epid < 0 || epid >= ENDPOINT_MAX) {
419 if (pipe_id != USB_REG_IN_PIPE)
420 dev_kfree_skb_any(skb);
421 else
422 kfree_skb(skb);
423 return;
424 }
425
426 if (epid == ENDPOINT0) {
427
428
429 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
430 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
431
432 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
433 }
434
435
436 msg_id = (__be16 *) ((void *) htc_hdr +
437 sizeof(struct htc_frame_hdr));
438
439
440 switch (be16_to_cpu(*msg_id)) {
441 case HTC_MSG_READY_ID:
442 htc_process_target_rdy(htc_handle, htc_hdr);
443 break;
444 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
445 htc_process_conn_rsp(htc_handle, htc_hdr);
446 break;
447 default:
448 break;
449 }
450
451 kfree_skb(skb);
452
453 } else {
454 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
455 skb_trim(skb, len - htc_hdr->control[0]);
456
457 skb_pull(skb, sizeof(struct htc_frame_hdr));
458
459 endpoint = &htc_handle->endpoint[epid];
460 if (endpoint->ep_callbacks.rx)
461 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
462 skb, epid);
463 }
464}
465
466struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
467 struct ath9k_htc_hif *hif,
468 struct device *dev)
469{
470 struct htc_endpoint *endpoint;
471 struct htc_target *target;
472
473 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
474 if (!target)
475 return NULL;
476
477 init_completion(&target->target_wait);
478 init_completion(&target->cmd_wait);
479
480 target->hif = hif;
481 target->hif_dev = hif_handle;
482 target->dev = dev;
483
484
485 endpoint = &target->endpoint[ENDPOINT0];
486 endpoint->ul_pipeid = hif->control_ul_pipe;
487 endpoint->dl_pipeid = hif->control_dl_pipe;
488
489 atomic_set(&target->tgt_ready, 0);
490
491 return target;
492}
493
494void ath9k_htc_hw_free(struct htc_target *htc)
495{
496 kfree(htc);
497}
498
499int ath9k_htc_hw_init(struct htc_target *target,
500 struct device *dev, u16 devid,
501 char *product, u32 drv_info)
502{
503 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
504 pr_err("Failed to initialize the device\n");
505 return -ENODEV;
506 }
507
508 return 0;
509}
510
511void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
512{
513 if (target)
514 ath9k_htc_disconnect_device(target, hot_unplug);
515}
516
