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