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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 = (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;
150 unsigned long time_left;
151
152 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
153 if (!skb) {
154 dev_err(target->dev, "failed to allocate send buffer\n");
155 return -ENOMEM;
156 }
157 skb_reserve(skb, sizeof(struct htc_frame_hdr));
158
159 cp_msg = (struct htc_config_pipe_msg *)
160 skb_put(skb, sizeof(struct htc_config_pipe_msg));
161
162 cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID);
163 cp_msg->pipe_id = USB_WLAN_TX_PIPE;
164 cp_msg->credits = target->credits;
165
166 target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
167
168 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
169 if (ret)
170 goto err;
171
172 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
173 if (!time_left) {
174 dev_err(target->dev, "HTC credit config timeout\n");
175 return -ETIMEDOUT;
176 }
177
178 return 0;
179err:
180 kfree_skb(skb);
181 return -EINVAL;
182}
183
184static int htc_setup_complete(struct htc_target *target)
185{
186 struct sk_buff *skb;
187 struct htc_comp_msg *comp_msg;
188 int ret = 0;
189 unsigned long time_left;
190
191 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
192 if (!skb) {
193 dev_err(target->dev, "failed to allocate send buffer\n");
194 return -ENOMEM;
195 }
196 skb_reserve(skb, sizeof(struct htc_frame_hdr));
197
198 comp_msg = (struct htc_comp_msg *)
199 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/* HTC APIs */
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 /* Find an available endpoint */
245 endpoint = get_next_avail_ep(target->endpoint);
246 if (!endpoint) {
247 dev_err(target->dev, "Endpoint is not available for"
248 "service %d\n", 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 = (struct htc_conn_svc_msg *)
269 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 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
277 if (ret)
278 goto err;
279
280 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
281 if (!time_left) {
282 dev_err(target->dev, "Service connection timeout for: %d\n",
283 service_connreq->service_id);
284 return -ETIMEDOUT;
285 }
286
287 *conn_rsp_epid = target->conn_rsp_epid;
288 return 0;
289err:
290 kfree_skb(skb);
291 return ret;
292}
293
294int htc_send(struct htc_target *target, struct sk_buff *skb)
295{
296 struct ath9k_htc_tx_ctl *tx_ctl;
297
298 tx_ctl = HTC_SKB_CB(skb);
299 return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
300}
301
302int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
303 enum htc_endpoint_id epid)
304{
305 return htc_issue_send(target, skb, skb->len, 0, epid);
306}
307
308void htc_stop(struct htc_target *target)
309{
310 target->hif->stop(target->hif_dev);
311}
312
313void htc_start(struct htc_target *target)
314{
315 target->hif->start(target->hif_dev);
316}
317
318void htc_sta_drain(struct htc_target *target, u8 idx)
319{
320 target->hif->sta_drain(target->hif_dev, idx);
321}
322
323void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
324 struct sk_buff *skb, bool txok)
325{
326 struct htc_endpoint *endpoint;
327 struct htc_frame_hdr *htc_hdr = NULL;
328
329 if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
330 complete(&htc_handle->cmd_wait);
331 htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
332 goto ret;
333 }
334
335 if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
336 complete(&htc_handle->cmd_wait);
337 htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
338 goto ret;
339 }
340
341 if (skb) {
342 htc_hdr = (struct htc_frame_hdr *) skb->data;
343 endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id];
344 skb_pull(skb, sizeof(struct htc_frame_hdr));
345
346 if (endpoint->ep_callbacks.tx) {
347 endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
348 skb, htc_hdr->endpoint_id,
349 txok);
350 } else {
351 kfree_skb(skb);
352 }
353 }
354
355 return;
356ret:
357 kfree_skb(skb);
358}
359
360static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle,
361 struct sk_buff *skb)
362{
363 uint32_t *pattern = (uint32_t *)skb->data;
364
365 switch (*pattern) {
366 case 0x33221199:
367 {
368 struct htc_panic_bad_vaddr *htc_panic;
369 htc_panic = (struct htc_panic_bad_vaddr *) skb->data;
370 dev_err(htc_handle->dev, "ath: firmware panic! "
371 "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n",
372 htc_panic->exccause, htc_panic->pc,
373 htc_panic->badvaddr);
374 break;
375 }
376 case 0x33221299:
377 {
378 struct htc_panic_bad_epid *htc_panic;
379 htc_panic = (struct htc_panic_bad_epid *) skb->data;
380 dev_err(htc_handle->dev, "ath: firmware panic! "
381 "bad epid: 0x%08x\n", htc_panic->epid);
382 break;
383 }
384 default:
385 dev_err(htc_handle->dev, "ath: uknown panic pattern!\n");
386 break;
387 }
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 htc_hdr = (struct htc_frame_hdr *) skb->data;
409 epid = htc_hdr->endpoint_id;
410
411 if (epid == 0x99) {
412 ath9k_htc_fw_panic_report(htc_handle, skb);
413 kfree_skb(skb);
414 return;
415 }
416
417 if (epid < 0 || epid >= ENDPOINT_MAX) {
418 if (pipe_id != USB_REG_IN_PIPE)
419 dev_kfree_skb_any(skb);
420 else
421 kfree_skb(skb);
422 return;
423 }
424
425 if (epid == ENDPOINT0) {
426
427 /* Handle trailer */
428 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
429 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
430 /* Move past the Watchdog pattern */
431 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
432 }
433
434 /* Get the message ID */
435 msg_id = (__be16 *) ((void *) htc_hdr +
436 sizeof(struct htc_frame_hdr));
437
438 /* Now process HTC messages */
439 switch (be16_to_cpu(*msg_id)) {
440 case HTC_MSG_READY_ID:
441 htc_process_target_rdy(htc_handle, htc_hdr);
442 break;
443 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
444 htc_process_conn_rsp(htc_handle, htc_hdr);
445 break;
446 default:
447 break;
448 }
449
450 kfree_skb(skb);
451
452 } else {
453 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
454 skb_trim(skb, len - htc_hdr->control[0]);
455
456 skb_pull(skb, sizeof(struct htc_frame_hdr));
457
458 endpoint = &htc_handle->endpoint[epid];
459 if (endpoint->ep_callbacks.rx)
460 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
461 skb, epid);
462 }
463}
464
465struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
466 struct ath9k_htc_hif *hif,
467 struct device *dev)
468{
469 struct htc_endpoint *endpoint;
470 struct htc_target *target;
471
472 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
473 if (!target)
474 return NULL;
475
476 init_completion(&target->target_wait);
477 init_completion(&target->cmd_wait);
478
479 target->hif = hif;
480 target->hif_dev = hif_handle;
481 target->dev = dev;
482
483 /* Assign control endpoint pipe IDs */
484 endpoint = &target->endpoint[ENDPOINT0];
485 endpoint->ul_pipeid = hif->control_ul_pipe;
486 endpoint->dl_pipeid = hif->control_dl_pipe;
487
488 atomic_set(&target->tgt_ready, 0);
489
490 return target;
491}
492
493void ath9k_htc_hw_free(struct htc_target *htc)
494{
495 kfree(htc);
496}
497
498int ath9k_htc_hw_init(struct htc_target *target,
499 struct device *dev, u16 devid,
500 char *product, u32 drv_info)
501{
502 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
503 pr_err("Failed to initialize the device\n");
504 return -ENODEV;
505 }
506
507 return 0;
508}
509
510void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
511{
512 if (target)
513 ath9k_htc_disconnect_device(target, hot_unplug);
514}