Loading...
1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17#include "htc.h"
18
19static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
20 u16 len, u8 flags, u8 epid)
21
22{
23 struct htc_frame_hdr *hdr;
24 struct htc_endpoint *endpoint = &target->endpoint[epid];
25 int status;
26
27 hdr = (struct htc_frame_hdr *)
28 skb_push(skb, sizeof(struct htc_frame_hdr));
29 hdr->endpoint_id = epid;
30 hdr->flags = flags;
31 hdr->payload_len = cpu_to_be16(len);
32
33 status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb);
34
35 return status;
36}
37
38static struct htc_endpoint *get_next_avail_ep(struct htc_endpoint *endpoint)
39{
40 enum htc_endpoint_id avail_epid;
41
42 for (avail_epid = (ENDPOINT_MAX - 1); avail_epid > ENDPOINT0; avail_epid--)
43 if (endpoint[avail_epid].service_id == 0)
44 return &endpoint[avail_epid];
45 return NULL;
46}
47
48static u8 service_to_ulpipe(u16 service_id)
49{
50 switch (service_id) {
51 case WMI_CONTROL_SVC:
52 return 4;
53 case WMI_BEACON_SVC:
54 case WMI_CAB_SVC:
55 case WMI_UAPSD_SVC:
56 case WMI_MGMT_SVC:
57 case WMI_DATA_VO_SVC:
58 case WMI_DATA_VI_SVC:
59 case WMI_DATA_BE_SVC:
60 case WMI_DATA_BK_SVC:
61 return 1;
62 default:
63 return 0;
64 }
65}
66
67static u8 service_to_dlpipe(u16 service_id)
68{
69 switch (service_id) {
70 case WMI_CONTROL_SVC:
71 return 3;
72 case WMI_BEACON_SVC:
73 case WMI_CAB_SVC:
74 case WMI_UAPSD_SVC:
75 case WMI_MGMT_SVC:
76 case WMI_DATA_VO_SVC:
77 case WMI_DATA_VI_SVC:
78 case WMI_DATA_BE_SVC:
79 case WMI_DATA_BK_SVC:
80 return 2;
81 default:
82 return 0;
83 }
84}
85
86static void htc_process_target_rdy(struct htc_target *target,
87 void *buf)
88{
89 struct htc_endpoint *endpoint;
90 struct htc_ready_msg *htc_ready_msg = (struct htc_ready_msg *) buf;
91
92 target->credit_size = be16_to_cpu(htc_ready_msg->credit_size);
93
94 endpoint = &target->endpoint[ENDPOINT0];
95 endpoint->service_id = HTC_CTRL_RSVD_SVC;
96 endpoint->max_msglen = HTC_MAX_CONTROL_MESSAGE_LENGTH;
97 atomic_inc(&target->tgt_ready);
98 complete(&target->target_wait);
99}
100
101static void htc_process_conn_rsp(struct htc_target *target,
102 struct htc_frame_hdr *htc_hdr)
103{
104 struct htc_conn_svc_rspmsg *svc_rspmsg;
105 struct htc_endpoint *endpoint, *tmp_endpoint = NULL;
106 u16 service_id;
107 u16 max_msglen;
108 enum htc_endpoint_id epid, tepid;
109
110 svc_rspmsg = (struct htc_conn_svc_rspmsg *)
111 ((void *) htc_hdr + sizeof(struct htc_frame_hdr));
112
113 if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) {
114 epid = svc_rspmsg->endpoint_id;
115 service_id = be16_to_cpu(svc_rspmsg->service_id);
116 max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len);
117 endpoint = &target->endpoint[epid];
118
119 for (tepid = (ENDPOINT_MAX - 1); tepid > ENDPOINT0; tepid--) {
120 tmp_endpoint = &target->endpoint[tepid];
121 if (tmp_endpoint->service_id == service_id) {
122 tmp_endpoint->service_id = 0;
123 break;
124 }
125 }
126
127 if (tepid == ENDPOINT0)
128 return;
129
130 endpoint->service_id = service_id;
131 endpoint->max_txqdepth = tmp_endpoint->max_txqdepth;
132 endpoint->ep_callbacks = tmp_endpoint->ep_callbacks;
133 endpoint->ul_pipeid = tmp_endpoint->ul_pipeid;
134 endpoint->dl_pipeid = tmp_endpoint->dl_pipeid;
135 endpoint->max_msglen = max_msglen;
136 target->conn_rsp_epid = epid;
137 complete(&target->cmd_wait);
138 } else {
139 target->conn_rsp_epid = ENDPOINT_UNUSED;
140 }
141}
142
143static int htc_config_pipe_credits(struct htc_target *target)
144{
145 struct sk_buff *skb;
146 struct htc_config_pipe_msg *cp_msg;
147 int ret, time_left;
148
149 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
150 if (!skb) {
151 dev_err(target->dev, "failed to allocate send buffer\n");
152 return -ENOMEM;
153 }
154 skb_reserve(skb, sizeof(struct htc_frame_hdr));
155
156 cp_msg = (struct htc_config_pipe_msg *)
157 skb_put(skb, sizeof(struct htc_config_pipe_msg));
158
159 cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID);
160 cp_msg->pipe_id = USB_WLAN_TX_PIPE;
161 cp_msg->credits = target->credits;
162
163 target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
164
165 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
166 if (ret)
167 goto err;
168
169 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
170 if (!time_left) {
171 dev_err(target->dev, "HTC credit config timeout\n");
172 return -ETIMEDOUT;
173 }
174
175 return 0;
176err:
177 kfree_skb(skb);
178 return -EINVAL;
179}
180
181static int htc_setup_complete(struct htc_target *target)
182{
183 struct sk_buff *skb;
184 struct htc_comp_msg *comp_msg;
185 int ret = 0, time_left;
186
187 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
188 if (!skb) {
189 dev_err(target->dev, "failed to allocate send buffer\n");
190 return -ENOMEM;
191 }
192 skb_reserve(skb, sizeof(struct htc_frame_hdr));
193
194 comp_msg = (struct htc_comp_msg *)
195 skb_put(skb, sizeof(struct htc_comp_msg));
196 comp_msg->msg_id = cpu_to_be16(HTC_MSG_SETUP_COMPLETE_ID);
197
198 target->htc_flags |= HTC_OP_START_WAIT;
199
200 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
201 if (ret)
202 goto err;
203
204 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
205 if (!time_left) {
206 dev_err(target->dev, "HTC start timeout\n");
207 return -ETIMEDOUT;
208 }
209
210 return 0;
211
212err:
213 kfree_skb(skb);
214 return -EINVAL;
215}
216
217/* HTC APIs */
218
219int htc_init(struct htc_target *target)
220{
221 int ret;
222
223 ret = htc_config_pipe_credits(target);
224 if (ret)
225 return ret;
226
227 return htc_setup_complete(target);
228}
229
230int htc_connect_service(struct htc_target *target,
231 struct htc_service_connreq *service_connreq,
232 enum htc_endpoint_id *conn_rsp_epid)
233{
234 struct sk_buff *skb;
235 struct htc_endpoint *endpoint;
236 struct htc_conn_svc_msg *conn_msg;
237 int ret, time_left;
238
239 /* Find an available endpoint */
240 endpoint = get_next_avail_ep(target->endpoint);
241 if (!endpoint) {
242 dev_err(target->dev, "Endpoint is not available for"
243 "service %d\n", service_connreq->service_id);
244 return -EINVAL;
245 }
246
247 endpoint->service_id = service_connreq->service_id;
248 endpoint->max_txqdepth = service_connreq->max_send_qdepth;
249 endpoint->ul_pipeid = service_to_ulpipe(service_connreq->service_id);
250 endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id);
251 endpoint->ep_callbacks = service_connreq->ep_callbacks;
252
253 skb = alloc_skb(sizeof(struct htc_conn_svc_msg) +
254 sizeof(struct htc_frame_hdr), GFP_ATOMIC);
255 if (!skb) {
256 dev_err(target->dev, "Failed to allocate buf to send"
257 "service connect req\n");
258 return -ENOMEM;
259 }
260
261 skb_reserve(skb, sizeof(struct htc_frame_hdr));
262
263 conn_msg = (struct htc_conn_svc_msg *)
264 skb_put(skb, sizeof(struct htc_conn_svc_msg));
265 conn_msg->service_id = cpu_to_be16(service_connreq->service_id);
266 conn_msg->msg_id = cpu_to_be16(HTC_MSG_CONNECT_SERVICE_ID);
267 conn_msg->con_flags = cpu_to_be16(service_connreq->con_flags);
268 conn_msg->dl_pipeid = endpoint->dl_pipeid;
269 conn_msg->ul_pipeid = endpoint->ul_pipeid;
270
271 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
272 if (ret)
273 goto err;
274
275 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
276 if (!time_left) {
277 dev_err(target->dev, "Service connection timeout for: %d\n",
278 service_connreq->service_id);
279 return -ETIMEDOUT;
280 }
281
282 *conn_rsp_epid = target->conn_rsp_epid;
283 return 0;
284err:
285 kfree_skb(skb);
286 return ret;
287}
288
289int htc_send(struct htc_target *target, struct sk_buff *skb)
290{
291 struct ath9k_htc_tx_ctl *tx_ctl;
292
293 tx_ctl = HTC_SKB_CB(skb);
294 return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
295}
296
297int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
298 enum htc_endpoint_id epid)
299{
300 return htc_issue_send(target, skb, skb->len, 0, epid);
301}
302
303void htc_stop(struct htc_target *target)
304{
305 target->hif->stop(target->hif_dev);
306}
307
308void htc_start(struct htc_target *target)
309{
310 target->hif->start(target->hif_dev);
311}
312
313void htc_sta_drain(struct htc_target *target, u8 idx)
314{
315 target->hif->sta_drain(target->hif_dev, idx);
316}
317
318void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
319 struct sk_buff *skb, bool txok)
320{
321 struct htc_endpoint *endpoint;
322 struct htc_frame_hdr *htc_hdr = NULL;
323
324 if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
325 complete(&htc_handle->cmd_wait);
326 htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
327 goto ret;
328 }
329
330 if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
331 complete(&htc_handle->cmd_wait);
332 htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
333 goto ret;
334 }
335
336 if (skb) {
337 htc_hdr = (struct htc_frame_hdr *) skb->data;
338 endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id];
339 skb_pull(skb, sizeof(struct htc_frame_hdr));
340
341 if (endpoint->ep_callbacks.tx) {
342 endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
343 skb, htc_hdr->endpoint_id,
344 txok);
345 }
346 }
347
348 return;
349ret:
350 /* HTC-generated packets are freed here. */
351 if (htc_hdr && htc_hdr->endpoint_id != ENDPOINT0)
352 dev_kfree_skb_any(skb);
353 else
354 kfree_skb(skb);
355}
356
357/*
358 * HTC Messages are handled directly here and the obtained SKB
359 * is freed.
360 *
361 * Service messages (Data, WMI) passed to the corresponding
362 * endpoint RX handlers, which have to free the SKB.
363 */
364void ath9k_htc_rx_msg(struct htc_target *htc_handle,
365 struct sk_buff *skb, u32 len, u8 pipe_id)
366{
367 struct htc_frame_hdr *htc_hdr;
368 enum htc_endpoint_id epid;
369 struct htc_endpoint *endpoint;
370 __be16 *msg_id;
371
372 if (!htc_handle || !skb)
373 return;
374
375 htc_hdr = (struct htc_frame_hdr *) skb->data;
376 epid = htc_hdr->endpoint_id;
377
378 if (epid >= ENDPOINT_MAX) {
379 if (pipe_id != USB_REG_IN_PIPE)
380 dev_kfree_skb_any(skb);
381 else
382 kfree_skb(skb);
383 return;
384 }
385
386 if (epid == ENDPOINT0) {
387
388 /* Handle trailer */
389 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
390 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
391 /* Move past the Watchdog pattern */
392 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
393 }
394
395 /* Get the message ID */
396 msg_id = (__be16 *) ((void *) htc_hdr +
397 sizeof(struct htc_frame_hdr));
398
399 /* Now process HTC messages */
400 switch (be16_to_cpu(*msg_id)) {
401 case HTC_MSG_READY_ID:
402 htc_process_target_rdy(htc_handle, htc_hdr);
403 break;
404 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
405 htc_process_conn_rsp(htc_handle, htc_hdr);
406 break;
407 default:
408 break;
409 }
410
411 kfree_skb(skb);
412
413 } else {
414 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
415 skb_trim(skb, len - htc_hdr->control[0]);
416
417 skb_pull(skb, sizeof(struct htc_frame_hdr));
418
419 endpoint = &htc_handle->endpoint[epid];
420 if (endpoint->ep_callbacks.rx)
421 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
422 skb, epid);
423 }
424}
425
426struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
427 struct ath9k_htc_hif *hif,
428 struct device *dev)
429{
430 struct htc_endpoint *endpoint;
431 struct htc_target *target;
432
433 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
434 if (!target) {
435 printk(KERN_ERR "Unable to allocate memory for"
436 "target device\n");
437 return NULL;
438 }
439
440 init_completion(&target->target_wait);
441 init_completion(&target->cmd_wait);
442
443 target->hif = hif;
444 target->hif_dev = hif_handle;
445 target->dev = dev;
446
447 /* Assign control endpoint pipe IDs */
448 endpoint = &target->endpoint[ENDPOINT0];
449 endpoint->ul_pipeid = hif->control_ul_pipe;
450 endpoint->dl_pipeid = hif->control_dl_pipe;
451
452 atomic_set(&target->tgt_ready, 0);
453
454 return target;
455}
456
457void ath9k_htc_hw_free(struct htc_target *htc)
458{
459 kfree(htc);
460}
461
462int ath9k_htc_hw_init(struct htc_target *target,
463 struct device *dev, u16 devid,
464 char *product, u32 drv_info)
465{
466 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
467 printk(KERN_ERR "Failed to initialize the device\n");
468 return -ENODEV;
469 }
470
471 return 0;
472}
473
474void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
475{
476 if (target)
477 ath9k_htc_disconnect_device(target, hot_unplug);
478}
1/*
2 * Copyright (c) 2010-2011 Atheros Communications Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
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 memset(hdr->control, 0, sizeof(hdr->control));
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 if (epid < 0 || epid >= ENDPOINT_MAX)
118 return;
119
120 service_id = be16_to_cpu(svc_rspmsg->service_id);
121 max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len);
122 endpoint = &target->endpoint[epid];
123
124 for (tepid = (ENDPOINT_MAX - 1); tepid > ENDPOINT0; tepid--) {
125 tmp_endpoint = &target->endpoint[tepid];
126 if (tmp_endpoint->service_id == service_id) {
127 tmp_endpoint->service_id = 0;
128 break;
129 }
130 }
131
132 if (tepid == ENDPOINT0)
133 return;
134
135 endpoint->service_id = service_id;
136 endpoint->max_txqdepth = tmp_endpoint->max_txqdepth;
137 endpoint->ep_callbacks = tmp_endpoint->ep_callbacks;
138 endpoint->ul_pipeid = tmp_endpoint->ul_pipeid;
139 endpoint->dl_pipeid = tmp_endpoint->dl_pipeid;
140 endpoint->max_msglen = max_msglen;
141 target->conn_rsp_epid = epid;
142 complete(&target->cmd_wait);
143 } else {
144 target->conn_rsp_epid = ENDPOINT_UNUSED;
145 }
146}
147
148static int htc_config_pipe_credits(struct htc_target *target)
149{
150 struct sk_buff *skb;
151 struct htc_config_pipe_msg *cp_msg;
152 int ret;
153 unsigned long time_left;
154
155 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
156 if (!skb) {
157 dev_err(target->dev, "failed to allocate send buffer\n");
158 return -ENOMEM;
159 }
160 skb_reserve(skb, sizeof(struct htc_frame_hdr));
161
162 cp_msg = skb_put(skb, sizeof(struct htc_config_pipe_msg));
163
164 cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID);
165 cp_msg->pipe_id = USB_WLAN_TX_PIPE;
166 cp_msg->credits = target->credits;
167
168 target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
169
170 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
171 if (ret)
172 goto err;
173
174 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
175 if (!time_left) {
176 dev_err(target->dev, "HTC credit config timeout\n");
177 return -ETIMEDOUT;
178 }
179
180 return 0;
181err:
182 kfree_skb(skb);
183 return -EINVAL;
184}
185
186static int htc_setup_complete(struct htc_target *target)
187{
188 struct sk_buff *skb;
189 struct htc_comp_msg *comp_msg;
190 int ret = 0;
191 unsigned long time_left;
192
193 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
194 if (!skb) {
195 dev_err(target->dev, "failed to allocate send buffer\n");
196 return -ENOMEM;
197 }
198 skb_reserve(skb, sizeof(struct htc_frame_hdr));
199
200 comp_msg = skb_put(skb, sizeof(struct htc_comp_msg));
201 comp_msg->msg_id = cpu_to_be16(HTC_MSG_SETUP_COMPLETE_ID);
202
203 target->htc_flags |= HTC_OP_START_WAIT;
204
205 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
206 if (ret)
207 goto err;
208
209 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
210 if (!time_left) {
211 dev_err(target->dev, "HTC start timeout\n");
212 return -ETIMEDOUT;
213 }
214
215 return 0;
216
217err:
218 kfree_skb(skb);
219 return -EINVAL;
220}
221
222/* HTC APIs */
223
224int htc_init(struct htc_target *target)
225{
226 int ret;
227
228 ret = htc_config_pipe_credits(target);
229 if (ret)
230 return ret;
231
232 return htc_setup_complete(target);
233}
234
235int htc_connect_service(struct htc_target *target,
236 struct htc_service_connreq *service_connreq,
237 enum htc_endpoint_id *conn_rsp_epid)
238{
239 struct sk_buff *skb;
240 struct htc_endpoint *endpoint;
241 struct htc_conn_svc_msg *conn_msg;
242 int ret;
243 unsigned long time_left;
244
245 /* Find an available endpoint */
246 endpoint = get_next_avail_ep(target->endpoint);
247 if (!endpoint) {
248 dev_err(target->dev, "Endpoint is not available for service %d\n",
249 service_connreq->service_id);
250 return -EINVAL;
251 }
252
253 endpoint->service_id = service_connreq->service_id;
254 endpoint->max_txqdepth = service_connreq->max_send_qdepth;
255 endpoint->ul_pipeid = service_to_ulpipe(service_connreq->service_id);
256 endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id);
257 endpoint->ep_callbacks = service_connreq->ep_callbacks;
258
259 skb = alloc_skb(sizeof(struct htc_conn_svc_msg) +
260 sizeof(struct htc_frame_hdr), GFP_ATOMIC);
261 if (!skb) {
262 dev_err(target->dev, "Failed to allocate buf to send"
263 "service connect req\n");
264 return -ENOMEM;
265 }
266
267 skb_reserve(skb, sizeof(struct htc_frame_hdr));
268
269 conn_msg = skb_put(skb, sizeof(struct htc_conn_svc_msg));
270 conn_msg->service_id = cpu_to_be16(service_connreq->service_id);
271 conn_msg->msg_id = cpu_to_be16(HTC_MSG_CONNECT_SERVICE_ID);
272 conn_msg->con_flags = cpu_to_be16(service_connreq->con_flags);
273 conn_msg->dl_pipeid = endpoint->dl_pipeid;
274 conn_msg->ul_pipeid = endpoint->ul_pipeid;
275
276 /* To prevent infoleak */
277 conn_msg->svc_meta_len = 0;
278 conn_msg->pad = 0;
279
280 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
281 if (ret)
282 goto err;
283
284 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
285 if (!time_left) {
286 dev_err(target->dev, "Service connection timeout for: %d\n",
287 service_connreq->service_id);
288 return -ETIMEDOUT;
289 }
290
291 *conn_rsp_epid = target->conn_rsp_epid;
292 return 0;
293err:
294 kfree_skb(skb);
295 return ret;
296}
297
298int htc_send(struct htc_target *target, struct sk_buff *skb)
299{
300 struct ath9k_htc_tx_ctl *tx_ctl;
301
302 tx_ctl = HTC_SKB_CB(skb);
303 return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
304}
305
306int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
307 enum htc_endpoint_id epid)
308{
309 return htc_issue_send(target, skb, skb->len, 0, epid);
310}
311
312void htc_stop(struct htc_target *target)
313{
314 target->hif->stop(target->hif_dev);
315}
316
317void htc_start(struct htc_target *target)
318{
319 target->hif->start(target->hif_dev);
320}
321
322void htc_sta_drain(struct htc_target *target, u8 idx)
323{
324 target->hif->sta_drain(target->hif_dev, idx);
325}
326
327void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
328 struct sk_buff *skb, bool txok)
329{
330 struct htc_endpoint *endpoint;
331 struct htc_frame_hdr *htc_hdr = NULL;
332
333 if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
334 complete(&htc_handle->cmd_wait);
335 htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
336 goto ret;
337 }
338
339 if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
340 complete(&htc_handle->cmd_wait);
341 htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
342 goto ret;
343 }
344
345 if (skb) {
346 htc_hdr = (struct htc_frame_hdr *) skb->data;
347 if (htc_hdr->endpoint_id >= ARRAY_SIZE(htc_handle->endpoint))
348 goto ret;
349 endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id];
350 skb_pull(skb, sizeof(struct htc_frame_hdr));
351
352 if (endpoint->ep_callbacks.tx) {
353 endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
354 skb, htc_hdr->endpoint_id,
355 txok);
356 } else {
357 kfree_skb(skb);
358 }
359 }
360
361 return;
362ret:
363 kfree_skb(skb);
364}
365
366static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle,
367 struct sk_buff *skb, u32 len)
368{
369 uint32_t *pattern = (uint32_t *)skb->data;
370
371 if (*pattern == 0x33221199 && len >= sizeof(struct htc_panic_bad_vaddr)) {
372 struct htc_panic_bad_vaddr *htc_panic;
373 htc_panic = (struct htc_panic_bad_vaddr *) skb->data;
374 dev_err(htc_handle->dev, "ath: firmware panic! "
375 "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n",
376 htc_panic->exccause, htc_panic->pc,
377 htc_panic->badvaddr);
378 return;
379 }
380 if (*pattern == 0x33221299) {
381 struct htc_panic_bad_epid *htc_panic;
382 htc_panic = (struct htc_panic_bad_epid *) skb->data;
383 dev_err(htc_handle->dev, "ath: firmware panic! "
384 "bad epid: 0x%08x\n", htc_panic->epid);
385 return;
386 }
387 dev_err(htc_handle->dev, "ath: unknown panic pattern!\n");
388}
389
390/*
391 * HTC Messages are handled directly here and the obtained SKB
392 * is freed.
393 *
394 * Service messages (Data, WMI) passed to the corresponding
395 * endpoint RX handlers, which have to free the SKB.
396 */
397void ath9k_htc_rx_msg(struct htc_target *htc_handle,
398 struct sk_buff *skb, u32 len, u8 pipe_id)
399{
400 struct htc_frame_hdr *htc_hdr;
401 enum htc_endpoint_id epid;
402 struct htc_endpoint *endpoint;
403 __be16 *msg_id;
404
405 if (!htc_handle || !skb)
406 return;
407
408 /* A valid message requires len >= 8.
409 *
410 * sizeof(struct htc_frame_hdr) == 8
411 * sizeof(struct htc_ready_msg) == 8
412 * sizeof(struct htc_panic_bad_vaddr) == 16
413 * sizeof(struct htc_panic_bad_epid) == 8
414 */
415 if (unlikely(len < sizeof(struct htc_frame_hdr)))
416 goto invalid;
417 htc_hdr = (struct htc_frame_hdr *) skb->data;
418 epid = htc_hdr->endpoint_id;
419
420 if (epid == 0x99) {
421 ath9k_htc_fw_panic_report(htc_handle, skb, len);
422 kfree_skb(skb);
423 return;
424 }
425
426 if (epid < 0 || epid >= ENDPOINT_MAX) {
427invalid:
428 if (pipe_id != USB_REG_IN_PIPE)
429 dev_kfree_skb_any(skb);
430 else
431 kfree_skb(skb);
432 return;
433 }
434
435 if (epid == ENDPOINT0) {
436
437 /* Handle trailer */
438 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
439 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000) {
440 /* Move past the Watchdog pattern */
441 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
442 len -= 4;
443 }
444 }
445
446 /* Get the message ID */
447 if (unlikely(len < sizeof(struct htc_frame_hdr) + sizeof(__be16)))
448 goto invalid;
449 msg_id = (__be16 *) ((void *) htc_hdr +
450 sizeof(struct htc_frame_hdr));
451
452 /* Now process HTC messages */
453 switch (be16_to_cpu(*msg_id)) {
454 case HTC_MSG_READY_ID:
455 if (unlikely(len < sizeof(struct htc_ready_msg)))
456 goto invalid;
457 htc_process_target_rdy(htc_handle, htc_hdr);
458 break;
459 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
460 if (unlikely(len < sizeof(struct htc_frame_hdr) +
461 sizeof(struct htc_conn_svc_rspmsg)))
462 goto invalid;
463 htc_process_conn_rsp(htc_handle, htc_hdr);
464 break;
465 default:
466 break;
467 }
468
469 kfree_skb(skb);
470
471 } else {
472 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
473 skb_trim(skb, len - htc_hdr->control[0]);
474
475 skb_pull(skb, sizeof(struct htc_frame_hdr));
476
477 endpoint = &htc_handle->endpoint[epid];
478 if (endpoint->ep_callbacks.rx)
479 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
480 skb, epid);
481 }
482}
483
484struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
485 struct ath9k_htc_hif *hif,
486 struct device *dev)
487{
488 struct htc_endpoint *endpoint;
489 struct htc_target *target;
490
491 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
492 if (!target)
493 return NULL;
494
495 init_completion(&target->target_wait);
496 init_completion(&target->cmd_wait);
497
498 target->hif = hif;
499 target->hif_dev = hif_handle;
500 target->dev = dev;
501
502 /* Assign control endpoint pipe IDs */
503 endpoint = &target->endpoint[ENDPOINT0];
504 endpoint->ul_pipeid = hif->control_ul_pipe;
505 endpoint->dl_pipeid = hif->control_dl_pipe;
506
507 atomic_set(&target->tgt_ready, 0);
508
509 return target;
510}
511
512void ath9k_htc_hw_free(struct htc_target *htc)
513{
514 kfree(htc);
515}
516
517int ath9k_htc_hw_init(struct htc_target *target,
518 struct device *dev, u16 devid,
519 char *product, u32 drv_info)
520{
521 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
522 pr_err("Failed to initialize the device\n");
523 return -ENODEV;
524 }
525
526 return 0;
527}
528
529void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
530{
531 if (target)
532 ath9k_htc_disconnect_device(target, hot_unplug);
533}