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