2 * Copyright (c) 2010-2011 Atheros Communications Inc.
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.
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.
17 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
21 static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
22 u16 len, u8 flags, u8 epid)
25 struct htc_frame_hdr *hdr;
26 struct htc_endpoint *endpoint = &target->endpoint[epid];
29 hdr = (struct htc_frame_hdr *)
30 skb_push(skb, sizeof(struct htc_frame_hdr));
31 hdr->endpoint_id = epid;
33 hdr->payload_len = cpu_to_be16(len);
35 status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb);
40 static struct htc_endpoint *get_next_avail_ep(struct htc_endpoint *endpoint)
42 enum htc_endpoint_id avail_epid;
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];
50 static u8 service_to_ulpipe(u16 service_id)
69 static u8 service_to_dlpipe(u16 service_id)
88 static void htc_process_target_rdy(struct htc_target *target,
91 struct htc_endpoint *endpoint;
92 struct htc_ready_msg *htc_ready_msg = (struct htc_ready_msg *) buf;
94 target->credit_size = be16_to_cpu(htc_ready_msg->credit_size);
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);
103 static void htc_process_conn_rsp(struct htc_target *target,
104 struct htc_frame_hdr *htc_hdr)
106 struct htc_conn_svc_rspmsg *svc_rspmsg;
107 struct htc_endpoint *endpoint, *tmp_endpoint = NULL;
110 enum htc_endpoint_id epid, tepid;
112 svc_rspmsg = (struct htc_conn_svc_rspmsg *)
113 ((void *) htc_hdr + sizeof(struct htc_frame_hdr));
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];
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;
129 if (tepid == ENDPOINT0)
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);
141 target->conn_rsp_epid = ENDPOINT_UNUSED;
145 static int htc_config_pipe_credits(struct htc_target *target)
148 struct htc_config_pipe_msg *cp_msg;
151 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
153 dev_err(target->dev, "failed to allocate send buffer\n");
156 skb_reserve(skb, sizeof(struct htc_frame_hdr));
158 cp_msg = (struct htc_config_pipe_msg *)
159 skb_put(skb, sizeof(struct htc_config_pipe_msg));
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;
165 target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
167 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
171 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
173 dev_err(target->dev, "HTC credit config timeout\n");
183 static int htc_setup_complete(struct htc_target *target)
186 struct htc_comp_msg *comp_msg;
187 int ret = 0, time_left;
189 skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC);
191 dev_err(target->dev, "failed to allocate send buffer\n");
194 skb_reserve(skb, sizeof(struct htc_frame_hdr));
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);
200 target->htc_flags |= HTC_OP_START_WAIT;
202 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
206 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
208 dev_err(target->dev, "HTC start timeout\n");
221 int htc_init(struct htc_target *target)
225 ret = htc_config_pipe_credits(target);
229 return htc_setup_complete(target);
232 int htc_connect_service(struct htc_target *target,
233 struct htc_service_connreq *service_connreq,
234 enum htc_endpoint_id *conn_rsp_epid)
237 struct htc_endpoint *endpoint;
238 struct htc_conn_svc_msg *conn_msg;
241 /* Find an available endpoint */
242 endpoint = get_next_avail_ep(target->endpoint);
244 dev_err(target->dev, "Endpoint is not available for"
245 "service %d\n", service_connreq->service_id);
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;
255 skb = alloc_skb(sizeof(struct htc_conn_svc_msg) +
256 sizeof(struct htc_frame_hdr), GFP_ATOMIC);
258 dev_err(target->dev, "Failed to allocate buf to send"
259 "service connect req\n");
263 skb_reserve(skb, sizeof(struct htc_frame_hdr));
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;
273 ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0);
277 time_left = wait_for_completion_timeout(&target->cmd_wait, HZ);
279 dev_err(target->dev, "Service connection timeout for: %d\n",
280 service_connreq->service_id);
284 *conn_rsp_epid = target->conn_rsp_epid;
291 int htc_send(struct htc_target *target, struct sk_buff *skb)
293 struct ath9k_htc_tx_ctl *tx_ctl;
295 tx_ctl = HTC_SKB_CB(skb);
296 return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid);
299 int htc_send_epid(struct htc_target *target, struct sk_buff *skb,
300 enum htc_endpoint_id epid)
302 return htc_issue_send(target, skb, skb->len, 0, epid);
305 void htc_stop(struct htc_target *target)
307 target->hif->stop(target->hif_dev);
310 void htc_start(struct htc_target *target)
312 target->hif->start(target->hif_dev);
315 void htc_sta_drain(struct htc_target *target, u8 idx)
317 target->hif->sta_drain(target->hif_dev, idx);
320 void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle,
321 struct sk_buff *skb, bool txok)
323 struct htc_endpoint *endpoint;
324 struct htc_frame_hdr *htc_hdr = NULL;
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;
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;
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));
343 if (endpoint->ep_callbacks.tx) {
344 endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv,
345 skb, htc_hdr->endpoint_id,
354 /* HTC-generated packets are freed here. */
355 if (htc_hdr && htc_hdr->endpoint_id != ENDPOINT0)
356 dev_kfree_skb_any(skb);
362 * HTC Messages are handled directly here and the obtained SKB
365 * Service messages (Data, WMI) passed to the corresponding
366 * endpoint RX handlers, which have to free the SKB.
368 void ath9k_htc_rx_msg(struct htc_target *htc_handle,
369 struct sk_buff *skb, u32 len, u8 pipe_id)
371 struct htc_frame_hdr *htc_hdr;
372 enum htc_endpoint_id epid;
373 struct htc_endpoint *endpoint;
376 if (!htc_handle || !skb)
379 htc_hdr = (struct htc_frame_hdr *) skb->data;
380 epid = htc_hdr->endpoint_id;
382 if (epid >= ENDPOINT_MAX) {
383 if (pipe_id != USB_REG_IN_PIPE)
384 dev_kfree_skb_any(skb);
390 if (epid == ENDPOINT0) {
393 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
394 if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000)
395 /* Move past the Watchdog pattern */
396 htc_hdr = (struct htc_frame_hdr *)(skb->data + 4);
399 /* Get the message ID */
400 msg_id = (__be16 *) ((void *) htc_hdr +
401 sizeof(struct htc_frame_hdr));
403 /* Now process HTC messages */
404 switch (be16_to_cpu(*msg_id)) {
405 case HTC_MSG_READY_ID:
406 htc_process_target_rdy(htc_handle, htc_hdr);
408 case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID:
409 htc_process_conn_rsp(htc_handle, htc_hdr);
418 if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER)
419 skb_trim(skb, len - htc_hdr->control[0]);
421 skb_pull(skb, sizeof(struct htc_frame_hdr));
423 endpoint = &htc_handle->endpoint[epid];
424 if (endpoint->ep_callbacks.rx)
425 endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv,
430 struct htc_target *ath9k_htc_hw_alloc(void *hif_handle,
431 struct ath9k_htc_hif *hif,
434 struct htc_endpoint *endpoint;
435 struct htc_target *target;
437 target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
441 init_completion(&target->target_wait);
442 init_completion(&target->cmd_wait);
445 target->hif_dev = hif_handle;
448 /* Assign control endpoint pipe IDs */
449 endpoint = &target->endpoint[ENDPOINT0];
450 endpoint->ul_pipeid = hif->control_ul_pipe;
451 endpoint->dl_pipeid = hif->control_dl_pipe;
453 atomic_set(&target->tgt_ready, 0);
458 void ath9k_htc_hw_free(struct htc_target *htc)
463 int ath9k_htc_hw_init(struct htc_target *target,
464 struct device *dev, u16 devid,
465 char *product, u32 drv_info)
467 if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) {
468 pr_err("Failed to initialize the device\n");
475 void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug)
478 ath9k_htc_disconnect_device(target, hot_unplug);