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authorSujith <Sujith.Manoharan@atheros.com>2010-03-17 14:25:25 +0530
committerJohn W. Linville <linville@tuxdriver.com>2010-03-23 16:50:17 -0400
commitfb9987d0f748c983bb795a86f47522313f701a08 (patch)
treee70d809b887ba25ed1a5da018e8baae829d0b8ad /drivers/net/wireless/ath/ath9k/htc_hst.c
parent736b3a27b3c50c4a23717b802240435a69e8d0ff (diff)
ath9k_htc: Support for AR9271 chipset.
Features: * Station mode * IBSS mode * Monitor mode * Legacy support * HT support * TX/RX 11n Aggregation * HW encryption * LED * Suspend/Resume For more information: http://wireless.kernel.org/en/users/Drivers/ath9k_htc Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath9k/htc_hst.c')
-rw-r--r--drivers/net/wireless/ath/ath9k/htc_hst.c463
1 files changed, 463 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
new file mode 100644
index 00000000000..9a48999d097
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -0,0 +1,463 @@
+/*
+ * Copyright (c) 2010 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.
+ */
+
+#include "htc.h"
+
+static int htc_issue_send(struct htc_target *target, struct sk_buff* skb,
+ u16 len, u8 flags, u8 epid,
+ struct ath9k_htc_tx_ctl *tx_ctl)
+{
+ 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,
+ tx_ctl);
+ 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; 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->credits = be16_to_cpu(htc_ready_msg->credits);
+ 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;
+ 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; tepid > ENDPOINT0; tepid--) {
+ tmp_endpoint = &target->endpoint[tepid];
+ if (tmp_endpoint->service_id == service_id) {
+ tmp_endpoint->service_id = 0;
+ break;
+ }
+ }
+
+ if (!tmp_endpoint)
+ 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, time_left;
+
+ skb = dev_alloc_skb(50 + sizeof(struct htc_frame_hdr));
+ 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 = 28;
+
+ target->htc_flags |= HTC_OP_CONFIG_PIPE_CREDITS;
+
+ ret = htc_issue_send(target, skb, skb->len, 0, ENDPOINT0, NULL);
+ 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:
+ dev_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, time_left;
+
+ skb = dev_alloc_skb(50 + sizeof(struct htc_frame_hdr));
+ 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, NULL);
+ 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:
+ dev_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, 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 = dev_alloc_skb(sizeof(struct htc_conn_svc_msg) +
+ sizeof(struct htc_frame_hdr));
+ 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, NULL);
+ 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:
+ dev_kfree_skb(skb);
+ return ret;
+}
+
+int htc_send(struct htc_target *target, struct sk_buff *skb,
+ enum htc_endpoint_id epid, struct ath9k_htc_tx_ctl *tx_ctl)
+{
+ return htc_issue_send(target, skb, skb->len, 0, epid, tx_ctl);
+}
+
+void htc_stop(struct htc_target *target)
+{
+ enum htc_endpoint_id epid;
+ struct htc_endpoint *endpoint;
+
+ for (epid = ENDPOINT0; epid <= ENDPOINT_MAX; epid++) {
+ endpoint = &target->endpoint[epid];
+ if (endpoint->service_id != 0)
+ target->hif->stop(target->hif_dev, endpoint->ul_pipeid);
+ }
+}
+
+void htc_start(struct htc_target *target)
+{
+ enum htc_endpoint_id epid;
+ struct htc_endpoint *endpoint;
+
+ for (epid = ENDPOINT0; epid <= ENDPOINT_MAX; epid++) {
+ endpoint = &target->endpoint[epid];
+ if (endpoint->service_id != 0)
+ target->hif->start(target->hif_dev,
+ endpoint->ul_pipeid);
+ }
+}
+
+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;
+
+ if (htc_handle->htc_flags & HTC_OP_CONFIG_PIPE_CREDITS) {
+ complete(&htc_handle->cmd_wait);
+ htc_handle->htc_flags &= ~HTC_OP_CONFIG_PIPE_CREDITS;
+ }
+
+ if (htc_handle->htc_flags & HTC_OP_START_WAIT) {
+ complete(&htc_handle->cmd_wait);
+ htc_handle->htc_flags &= ~HTC_OP_START_WAIT;
+ }
+
+ 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(htc_handle->drv_priv, skb,
+ htc_hdr->endpoint_id, txok);
+ }
+ }
+}
+
+/*
+ * HTC Messages are handled directly here and the obtained SKB
+ * is freed.
+ *
+ * Sevice 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;
+ u16 *msg_id;
+
+ if (!htc_handle || !skb)
+ return;
+
+ htc_hdr = (struct htc_frame_hdr *) skb->data;
+ epid = htc_hdr->endpoint_id;
+
+ if (epid >= ENDPOINT_MAX) {
+ dev_kfree_skb_any(skb);
+ return;
+ }
+
+ if (epid == ENDPOINT0) {
+
+ /* Handle trailer */
+ if (htc_hdr->flags & HTC_FLAGS_RECV_TRAILER) {
+ if (be32_to_cpu(*(u32 *) skb->data) == 0x00C60000)
+ /* Move past the Watchdog pattern */
+ htc_hdr = (struct htc_frame_hdr *) skb->data + 4;
+ }
+
+ /* Get the message ID */
+ msg_id = (u16 *) ((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;
+ }
+
+ dev_kfree_skb_any(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 htc_target *target;
+
+ target = kzalloc(sizeof(struct htc_target), GFP_KERNEL);
+ if (!target)
+ printk(KERN_ERR "Unable to allocate memory for"
+ "target device\n");
+
+ return target;
+}
+
+void ath9k_htc_hw_free(struct htc_target *htc)
+{
+ kfree(htc);
+}
+
+int ath9k_htc_hw_init(struct ath9k_htc_hif *hif, struct htc_target *target,
+ void *hif_handle, struct device *dev, u16 devid,
+ enum ath9k_hif_transports transport)
+{
+ struct htc_endpoint *endpoint;
+ int err = 0;
+
+ 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;
+
+ err = ath9k_htc_probe_device(target, dev, devid);
+ if (err) {
+ printk(KERN_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);
+}