481 lines
12 KiB
C
481 lines
12 KiB
C
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/*
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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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#undef pr_fmt
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/printk.h>
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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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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 = (struct htc_frame_hdr *)
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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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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, 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 = (struct htc_config_pipe_msg *)
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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, 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 = (struct htc_comp_msg *)
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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, 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"
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"service %d\n", 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 = (struct htc_conn_svc_msg *)
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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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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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}
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}
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return;
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ret:
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/* HTC-generated packets are freed here. */
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if (htc_hdr && htc_hdr->endpoint_id != ENDPOINT0)
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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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}
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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
|
||
|
|
* 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 >= 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);
|
||
|
|
}
|