| /* |
| * Copyright (c) 2010-2011 Atheros Communications Inc. |
| * |
| * Permission to use, copy, modify, and/or distribute this software for any |
| * purpose with or without fee is hereby granted, provided that the above |
| * copyright notice and this permission notice appear in all copies. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include "htc.h" |
| |
| static int htc_issue_send(struct htc_target *target, struct sk_buff* skb, |
| u16 len, u8 flags, u8 epid) |
| |
| { |
| struct htc_frame_hdr *hdr; |
| struct htc_endpoint *endpoint = &target->endpoint[epid]; |
| int status; |
| |
| hdr = (struct htc_frame_hdr *) |
| skb_push(skb, sizeof(struct htc_frame_hdr)); |
| hdr->endpoint_id = epid; |
| hdr->flags = flags; |
| hdr->payload_len = cpu_to_be16(len); |
| |
| status = target->hif->send(target->hif_dev, endpoint->ul_pipeid, skb); |
| |
| return status; |
| } |
| |
| static struct htc_endpoint *get_next_avail_ep(struct htc_endpoint *endpoint) |
| { |
| enum htc_endpoint_id avail_epid; |
| |
| for (avail_epid = (ENDPOINT_MAX - 1); avail_epid > ENDPOINT0; avail_epid--) |
| if (endpoint[avail_epid].service_id == 0) |
| return &endpoint[avail_epid]; |
| return NULL; |
| } |
| |
| static u8 service_to_ulpipe(u16 service_id) |
| { |
| switch (service_id) { |
| case WMI_CONTROL_SVC: |
| return 4; |
| case WMI_BEACON_SVC: |
| case WMI_CAB_SVC: |
| case WMI_UAPSD_SVC: |
| case WMI_MGMT_SVC: |
| case WMI_DATA_VO_SVC: |
| case WMI_DATA_VI_SVC: |
| case WMI_DATA_BE_SVC: |
| case WMI_DATA_BK_SVC: |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| static u8 service_to_dlpipe(u16 service_id) |
| { |
| switch (service_id) { |
| case WMI_CONTROL_SVC: |
| return 3; |
| case WMI_BEACON_SVC: |
| case WMI_CAB_SVC: |
| case WMI_UAPSD_SVC: |
| case WMI_MGMT_SVC: |
| case WMI_DATA_VO_SVC: |
| case WMI_DATA_VI_SVC: |
| case WMI_DATA_BE_SVC: |
| case WMI_DATA_BK_SVC: |
| return 2; |
| default: |
| return 0; |
| } |
| } |
| |
| static void htc_process_target_rdy(struct htc_target *target, |
| void *buf) |
| { |
| struct htc_endpoint *endpoint; |
| struct htc_ready_msg *htc_ready_msg = (struct htc_ready_msg *) buf; |
| |
| target->credit_size = be16_to_cpu(htc_ready_msg->credit_size); |
| |
| endpoint = &target->endpoint[ENDPOINT0]; |
| endpoint->service_id = HTC_CTRL_RSVD_SVC; |
| endpoint->max_msglen = HTC_MAX_CONTROL_MESSAGE_LENGTH; |
| atomic_inc(&target->tgt_ready); |
| complete(&target->target_wait); |
| } |
| |
| static void htc_process_conn_rsp(struct htc_target *target, |
| struct htc_frame_hdr *htc_hdr) |
| { |
| struct htc_conn_svc_rspmsg *svc_rspmsg; |
| struct htc_endpoint *endpoint, *tmp_endpoint = NULL; |
| u16 service_id; |
| u16 max_msglen; |
| enum htc_endpoint_id epid, tepid; |
| |
| svc_rspmsg = (struct htc_conn_svc_rspmsg *) |
| ((void *) htc_hdr + sizeof(struct htc_frame_hdr)); |
| |
| if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) { |
| epid = svc_rspmsg->endpoint_id; |
| service_id = be16_to_cpu(svc_rspmsg->service_id); |
| max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len); |
| endpoint = &target->endpoint[epid]; |
| |
| for (tepid = (ENDPOINT_MAX - 1); tepid > ENDPOINT0; tepid--) { |
| tmp_endpoint = &target->endpoint[tepid]; |
| if (tmp_endpoint->service_id == service_id) { |
| tmp_endpoint->service_id = 0; |
| break; |
| } |
| } |
| |
| if (tepid == ENDPOINT0) |
| return; |
| |
| endpoint->service_id = service_id; |
| endpoint->max_txqdepth = tmp_endpoint->max_txqdepth; |
| endpoint->ep_callbacks = tmp_endpoint->ep_callbacks; |
| endpoint->ul_pipeid = tmp_endpoint->ul_pipeid; |
| endpoint->dl_pipeid = tmp_endpoint->dl_pipeid; |
| endpoint->max_msglen = max_msglen; |
| target->conn_rsp_epid = epid; |
| complete(&target->cmd_wait); |
| } else { |
| target->conn_rsp_epid = ENDPOINT_UNUSED; |
| } |
| } |
| |
| static int htc_config_pipe_credits(struct htc_target *target) |
| { |
| struct sk_buff *skb; |
| struct htc_config_pipe_msg *cp_msg; |
| int ret; |
| unsigned long time_left; |
| |
| skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC); |
| if (!skb) { |
| dev_err(target->dev, "failed to allocate send buffer\n"); |
| return -ENOMEM; |
| } |
| skb_reserve(skb, sizeof(struct htc_frame_hdr)); |
| |
| cp_msg = (struct htc_config_pipe_msg *) |
| skb_put(skb, sizeof(struct htc_config_pipe_msg)); |
| |
| cp_msg->message_id = cpu_to_be16(HTC_MSG_CONFIG_PIPE_ID); |
| cp_msg->pipe_id = USB_WLAN_TX_PIPE; |
| cp_msg->credits = target->credits; |
| |
| target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS; |
| |
| ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0); |
| if (ret) |
| goto err; |
| |
| time_left = wait_for_completion_timeout(&target->cmd_wait, HZ); |
| if (!time_left) { |
| dev_err(target->dev, "HTC credit config timeout\n"); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| err: |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| static int htc_setup_complete(struct htc_target *target) |
| { |
| struct sk_buff *skb; |
| struct htc_comp_msg *comp_msg; |
| int ret = 0; |
| unsigned long time_left; |
| |
| skb = alloc_skb(50 + sizeof(struct htc_frame_hdr), GFP_ATOMIC); |
| if (!skb) { |
| dev_err(target->dev, "failed to allocate send buffer\n"); |
| return -ENOMEM; |
| } |
| skb_reserve(skb, sizeof(struct htc_frame_hdr)); |
| |
| comp_msg = (struct htc_comp_msg *) |
| skb_put(skb, sizeof(struct htc_comp_msg)); |
| comp_msg->msg_id = cpu_to_be16(HTC_MSG_SETUP_COMPLETE_ID); |
| |
| target->htc_flags |= HTC_OP_START_WAIT; |
| |
| ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0); |
| if (ret) |
| goto err; |
| |
| time_left = wait_for_completion_timeout(&target->cmd_wait, HZ); |
| if (!time_left) { |
| dev_err(target->dev, "HTC start timeout\n"); |
| return -ETIMEDOUT; |
| } |
| |
| return 0; |
| |
| err: |
| kfree_skb(skb); |
| return -EINVAL; |
| } |
| |
| /* HTC APIs */ |
| |
| int htc_init(struct htc_target *target) |
| { |
| int ret; |
| |
| ret = htc_config_pipe_credits(target); |
| if (ret) |
| return ret; |
| |
| return htc_setup_complete(target); |
| } |
| |
| int htc_connect_service(struct htc_target *target, |
| struct htc_service_connreq *service_connreq, |
| enum htc_endpoint_id *conn_rsp_epid) |
| { |
| struct sk_buff *skb; |
| struct htc_endpoint *endpoint; |
| struct htc_conn_svc_msg *conn_msg; |
| int ret; |
| unsigned long time_left; |
| |
| /* Find an available endpoint */ |
| endpoint = get_next_avail_ep(target->endpoint); |
| if (!endpoint) { |
| dev_err(target->dev, "Endpoint is not available for" |
| "service %d\n", service_connreq->service_id); |
| return -EINVAL; |
| } |
| |
| endpoint->service_id = service_connreq->service_id; |
| endpoint->max_txqdepth = service_connreq->max_send_qdepth; |
| endpoint->ul_pipeid = service_to_ulpipe(service_connreq->service_id); |
| endpoint->dl_pipeid = service_to_dlpipe(service_connreq->service_id); |
| endpoint->ep_callbacks = service_connreq->ep_callbacks; |
| |
| skb = alloc_skb(sizeof(struct htc_conn_svc_msg) + |
| sizeof(struct htc_frame_hdr), GFP_ATOMIC); |
| if (!skb) { |
| dev_err(target->dev, "Failed to allocate buf to send" |
| "service connect req\n"); |
| return -ENOMEM; |
| } |
| |
| skb_reserve(skb, sizeof(struct htc_frame_hdr)); |
| |
| conn_msg = (struct htc_conn_svc_msg *) |
| skb_put(skb, sizeof(struct htc_conn_svc_msg)); |
| conn_msg->service_id = cpu_to_be16(service_connreq->service_id); |
| conn_msg->msg_id = cpu_to_be16(HTC_MSG_CONNECT_SERVICE_ID); |
| conn_msg->con_flags = cpu_to_be16(service_connreq->con_flags); |
| conn_msg->dl_pipeid = endpoint->dl_pipeid; |
| conn_msg->ul_pipeid = endpoint->ul_pipeid; |
| |
| ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0); |
| if (ret) |
| goto err; |
| |
| time_left = wait_for_completion_timeout(&target->cmd_wait, HZ); |
| if (!time_left) { |
| dev_err(target->dev, "Service connection timeout for: %d\n", |
| service_connreq->service_id); |
| return -ETIMEDOUT; |
| } |
| |
| *conn_rsp_epid = target->conn_rsp_epid; |
| return 0; |
| err: |
| kfree_skb(skb); |
| return ret; |
| } |
| |
| int htc_send(struct htc_target *target, struct sk_buff *skb) |
| { |
| struct ath9k_htc_tx_ctl *tx_ctl; |
| |
| tx_ctl = HTC_SKB_CB(skb); |
| return htc_issue_send(target, skb, skb->len, 0, tx_ctl->epid); |
| } |
| |
| int htc_send_epid(struct htc_target *target, struct sk_buff *skb, |
| enum htc_endpoint_id epid) |
| { |
| return htc_issue_send(target, skb, skb->len, 0, epid); |
| } |
| |
| void htc_stop(struct htc_target *target) |
| { |
| target->hif->stop(target->hif_dev); |
| } |
| |
| void htc_start(struct htc_target *target) |
| { |
| target->hif->start(target->hif_dev); |
| } |
| |
| void htc_sta_drain(struct htc_target *target, u8 idx) |
| { |
| target->hif->sta_drain(target->hif_dev, idx); |
| } |
| |
| void ath9k_htc_txcompletion_cb(struct htc_target *htc_handle, |
| struct sk_buff *skb, bool txok) |
| { |
| struct htc_endpoint *endpoint; |
| struct htc_frame_hdr *htc_hdr = NULL; |
| |
| if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) { |
| complete(&htc_handle->cmd_wait); |
| htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS; |
| goto ret; |
| } |
| |
| if (htc_handle->htc_flags & HTC_OP_START_WAIT) { |
| complete(&htc_handle->cmd_wait); |
| htc_handle->htc_flags &= ~HTC_OP_START_WAIT; |
| goto ret; |
| } |
| |
| if (skb) { |
| htc_hdr = (struct htc_frame_hdr *) skb->data; |
| endpoint = &htc_handle->endpoint[htc_hdr->endpoint_id]; |
| skb_pull(skb, sizeof(struct htc_frame_hdr)); |
| |
| if (endpoint->ep_callbacks.tx) { |
| endpoint->ep_callbacks.tx(endpoint->ep_callbacks.priv, |
| skb, htc_hdr->endpoint_id, |
| txok); |
| } else { |
| kfree_skb(skb); |
| } |
| } |
| |
| return; |
| ret: |
| kfree_skb(skb); |
| } |
| |
| static void ath9k_htc_fw_panic_report(struct htc_target *htc_handle, |
| struct sk_buff *skb) |
| { |
| uint32_t *pattern = (uint32_t *)skb->data; |
| |
| switch (*pattern) { |
| case 0x33221199: |
| { |
| struct htc_panic_bad_vaddr *htc_panic; |
| htc_panic = (struct htc_panic_bad_vaddr *) skb->data; |
| dev_err(htc_handle->dev, "ath: firmware panic! " |
| "exccause: 0x%08x; pc: 0x%08x; badvaddr: 0x%08x.\n", |
| htc_panic->exccause, htc_panic->pc, |
| htc_panic->badvaddr); |
| break; |
| } |
| case 0x33221299: |
| { |
| struct htc_panic_bad_epid *htc_panic; |
| htc_panic = (struct htc_panic_bad_epid *) skb->data; |
| dev_err(htc_handle->dev, "ath: firmware panic! " |
| "bad epid: 0x%08x\n", htc_panic->epid); |
| break; |
| } |
| default: |
| dev_err(htc_handle->dev, "ath: uknown panic pattern!\n"); |
| break; |
| } |
| } |
| |
| /* |
| * HTC Messages are handled directly here and the obtained SKB |
| * is freed. |
| * |
| * Service messages (Data, WMI) passed to the corresponding |
| * endpoint RX handlers, which have to free the SKB. |
| */ |
| void ath9k_htc_rx_msg(struct htc_target *htc_handle, |
| struct sk_buff *skb, u32 len, u8 pipe_id) |
| { |
| struct htc_frame_hdr *htc_hdr; |
| enum htc_endpoint_id epid; |
| struct htc_endpoint *endpoint; |
| __be16 *msg_id; |
| |
| if (!htc_handle || !skb) |
| return; |
| |
| htc_hdr = (struct htc_frame_hdr *) skb->data; |
| epid = htc_hdr->endpoint_id; |
| |
| if (epid == 0x99) { |
| ath9k_htc_fw_panic_report(htc_handle, skb); |
| kfree_skb(skb); |
| return; |
| } |
| |
| if (epid < 0 || epid >= ENDPOINT_MAX) { |
| if (pipe_id != USB_REG_IN_PIPE) |
| dev_kfree_skb_any(skb); |
| else |
| kfree_skb(skb); |
| return; |
| } |
| |
| if (epid == ENDPOINT0) { |
| |
| /* Handle trailer */ |
| if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) { |
| if (be32_to_cpu(*(__be32 *) skb->data) == 0x00C60000) |
| /* Move past the Watchdog pattern */ |
| htc_hdr = (struct htc_frame_hdr *)(skb->data + 4); |
| } |
| |
| /* Get the message ID */ |
| msg_id = (__be16 *) ((void *) htc_hdr + |
| sizeof(struct htc_frame_hdr)); |
| |
| /* Now process HTC messages */ |
| switch (be16_to_cpu(*msg_id)) { |
| case HTC_MSG_READY_ID: |
| htc_process_target_rdy(htc_handle, htc_hdr); |
| break; |
| case HTC_MSG_CONNECT_SERVICE_RESPONSE_ID: |
| htc_process_conn_rsp(htc_handle, htc_hdr); |
| break; |
| default: |
| break; |
| } |
| |
| kfree_skb(skb); |
| |
| } else { |
| if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) |
| skb_trim(skb, len - htc_hdr->control[0]); |
| |
| skb_pull(skb, sizeof(struct htc_frame_hdr)); |
| |
| endpoint = &htc_handle->endpoint[epid]; |
| if (endpoint->ep_callbacks.rx) |
| endpoint->ep_callbacks.rx(endpoint->ep_callbacks.priv, |
| skb, epid); |
| } |
| } |
| |
| struct htc_target *ath9k_htc_hw_alloc(void *hif_handle, |
| struct ath9k_htc_hif *hif, |
| struct device *dev) |
| { |
| struct htc_endpoint *endpoint; |
| struct htc_target *target; |
| |
| target = kzalloc(sizeof(struct htc_target), GFP_KERNEL); |
| if (!target) |
| return NULL; |
| |
| init_completion(&target->target_wait); |
| init_completion(&target->cmd_wait); |
| |
| target->hif = hif; |
| target->hif_dev = hif_handle; |
| target->dev = dev; |
| |
| /* Assign control endpoint pipe IDs */ |
| endpoint = &target->endpoint[ENDPOINT0]; |
| endpoint->ul_pipeid = hif->control_ul_pipe; |
| endpoint->dl_pipeid = hif->control_dl_pipe; |
| |
| atomic_set(&target->tgt_ready, 0); |
| |
| return target; |
| } |
| |
| void ath9k_htc_hw_free(struct htc_target *htc) |
| { |
| kfree(htc); |
| } |
| |
| int ath9k_htc_hw_init(struct htc_target *target, |
| struct device *dev, u16 devid, |
| char *product, u32 drv_info) |
| { |
| if (ath9k_htc_probe_device(target, dev, devid, product, drv_info)) { |
| pr_err("Failed to initialize the device\n"); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| void ath9k_htc_hw_deinit(struct htc_target *target, bool hot_unplug) |
| { |
| if (target) |
| ath9k_htc_disconnect_device(target, hot_unplug); |
| } |