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