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 = (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/* HTC APIs */
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 /* Find an available endpoint */
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 }
348 }
349
350 return;
351ret:
352 /* HTC-generated packets are freed here. */
353 if (htc_hdr && htc_hdr->endpoint_id != ENDPOINT0)
354 dev_kfree_skb_any(skb);
355 else
356 kfree_skb(skb);
357}
358
359/*
360 * HTC Messages are handled directly here and the obtained SKB
361 * is freed.
362 *
363 * Service messages (Data, WMI) passed to the corresponding
364 * endpoint RX handlers, which have to free the SKB.
365 */
366void ath9k_htc_rx_msg(struct htc_target *htc_handle,
367 struct sk_buff *skb, u32 len, u8 pipe_id)
368{
369 struct htc_frame_hdr *htc_hdr;
370 enum htc_endpoint_id epid;
371 struct htc_endpoint *endpoint;
372 __be16 *msg_id;
373
374 if (!htc_handle || !skb)
375 return;
376
377 htc_hdr = (struct htc_frame_hdr *) skb->data;
378 epid = htc_hdr->endpoint_id;
379
380 if (epid >= ENDPOINT_MAX) {
381 if (pipe_id != USB_REG_IN_PIPE)
382 dev_kfree_skb_any(skb);
383 else
384 kfree_skb(skb);
385 return;
386 }
387
388 if (epid == ENDPOINT0) {
389
390 /* Handle trailer */
391 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
392 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
393 /* Move past the Watchdog pattern */
394 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
395 }
396
397 /* Get the message ID */
398 msg_id = (__be16 *) ((void *) htc_hdr +
399 sizeof(struct htc_frame_hdr));
400
401 /* Now process HTC messages */
402 switch (be16_to_cpu(*msg_id)) {
403 case HTC_MSG_READY_ID:
404 htc_process_target_rdy(htc_handle, htc_hdr);
405 break;
406 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
407 htc_process_conn_rsp(htc_handle, htc_hdr);
408 break;
409 default:
410 break;
411 }
412
413 kfree_skb(skb);
414
415 } else {
416 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
417 skb_trim(skb, len - htc_hdr->control[0]);
418
419 skb_pull(skb, sizeof(struct htc_frame_hdr));
420
421 endpoint = &htc_handle->endpoint[epid];
422 if (endpoint->ep_callbacks.rx)
423 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
424 skb, epid);
425 }
426}
427
428struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
429 struct ath9k_htc_hif *hif,
430 struct device *dev)
431{
432 struct htc_endpoint *endpoint;
433 struct htc_target *target;
434
435 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
436 if (!target)
437 return NULL;
438
439 init_completion(&target->target_wait);
440 init_completion(&target->cmd_wait);
441
442 target->hif = hif;
443 target->hif_dev = hif_handle;
444 target->dev = dev;
445
446 /* Assign control endpoint pipe IDs */
447 endpoint = &target->endpoint[ENDPOINT0];
448 endpoint->ul_pipeid = hif->control_ul_pipe;
449 endpoint->dl_pipeid = hif->control_dl_pipe;
450
451 atomic_set(&target->tgt_ready, 0);
452
453 return target;
454}
455
456void ath9k_htc_hw_free(struct htc_target *htc)
457{
458 kfree(htc);
459}
460
461int ath9k_htc_hw_init(struct htc_target *target,
462 struct device *dev, u16 devid,
463 char *product, u32 drv_info)
464{
465 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
466 pr_err("Failed to initialize the device\n");
467 return -ENODEV;
468 }
469
470 return 0;
471}
472
473void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
474{
475 if (target)
476 ath9k_htc_disconnect_device(target, hot_unplug);
477}