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>

1 files changed, 319 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath9k/wmi.c b/drivers/net/wireless/ath/ath9k/wmi.c
new file mode 100644
index 00000000000..818dea0164e
--- /dev/null
+++ b/drivers/net/wireless/ath/ath9k/wmi.c
@@ -0,0 +1,319 @@
+/*
+ * 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 const char *wmi_cmd_to_name(enum wmi_cmd_id wmi_cmd)
+{
+	switch (wmi_cmd) {
+	case WMI_ECHO_CMDID:
+		return "WMI_ECHO_CMDID";
+	case WMI_ACCESS_MEMORY_CMDID:
+		return "WMI_ACCESS_MEMORY_CMDID";
+	case WMI_DISABLE_INTR_CMDID:
+		return "WMI_DISABLE_INTR_CMDID";
+	case WMI_ENABLE_INTR_CMDID:
+		return "WMI_ENABLE_INTR_CMDID";
+	case WMI_RX_LINK_CMDID:
+		return "WMI_RX_LINK_CMDID";
+	case WMI_ATH_INIT_CMDID:
+		return "WMI_ATH_INIT_CMDID";
+	case WMI_ABORT_TXQ_CMDID:
+		return "WMI_ABORT_TXQ_CMDID";
+	case WMI_STOP_TX_DMA_CMDID:
+		return "WMI_STOP_TX_DMA_CMDID";
+	case WMI_STOP_DMA_RECV_CMDID:
+		return "WMI_STOP_DMA_RECV_CMDID";
+	case WMI_ABORT_TX_DMA_CMDID:
+		return "WMI_ABORT_TX_DMA_CMDID";
+	case WMI_DRAIN_TXQ_CMDID:
+		return "WMI_DRAIN_TXQ_CMDID";
+	case WMI_DRAIN_TXQ_ALL_CMDID:
+		return "WMI_DRAIN_TXQ_ALL_CMDID";
+	case WMI_START_RECV_CMDID:
+		return "WMI_START_RECV_CMDID";
+	case WMI_STOP_RECV_CMDID:
+		return "WMI_STOP_RECV_CMDID";
+	case WMI_FLUSH_RECV_CMDID:
+		return "WMI_FLUSH_RECV_CMDID";
+	case WMI_SET_MODE_CMDID:
+		return "WMI_SET_MODE_CMDID";
+	case WMI_RESET_CMDID:
+		return "WMI_RESET_CMDID";
+	case WMI_NODE_CREATE_CMDID:
+		return "WMI_NODE_CREATE_CMDID";
+	case WMI_NODE_REMOVE_CMDID:
+		return "WMI_NODE_REMOVE_CMDID";
+	case WMI_VAP_REMOVE_CMDID:
+		return "WMI_VAP_REMOVE_CMDID";
+	case WMI_VAP_CREATE_CMDID:
+		return "WMI_VAP_CREATE_CMDID";
+	case WMI_BEACON_UPDATE_CMDID:
+		return "WMI_BEACON_UPDATE_CMDID";
+	case WMI_REG_READ_CMDID:
+		return "WMI_REG_READ_CMDID";
+	case WMI_REG_WRITE_CMDID:
+		return "WMI_REG_WRITE_CMDID";
+	case WMI_RC_STATE_CHANGE_CMDID:
+		return "WMI_RC_STATE_CHANGE_CMDID";
+	case WMI_RC_RATE_UPDATE_CMDID:
+		return "WMI_RC_RATE_UPDATE_CMDID";
+	case WMI_DEBUG_INFO_CMDID:
+		return "WMI_DEBUG_INFO_CMDID";
+	case WMI_HOST_ATTACH:
+		return "WMI_HOST_ATTACH";
+	case WMI_TARGET_IC_UPDATE_CMDID:
+		return "WMI_TARGET_IC_UPDATE_CMDID";
+	case WMI_TGT_STATS_CMDID:
+		return "WMI_TGT_STATS_CMDID";
+	case WMI_TX_AGGR_ENABLE_CMDID:
+		return "WMI_TX_AGGR_ENABLE_CMDID";
+	case WMI_TGT_DETACH_CMDID:
+		return "WMI_TGT_DETACH_CMDID";
+	case WMI_TGT_TXQ_ENABLE_CMDID:
+		return "WMI_TGT_TXQ_ENABLE_CMDID";
+	}
+
+	return "Bogus";
+}
+
+struct wmi *ath9k_init_wmi(struct ath9k_htc_priv *priv)
+{
+	struct wmi *wmi;
+
+	wmi = kzalloc(sizeof(struct wmi), GFP_KERNEL);
+	if (!wmi)
+		return NULL;
+
+	wmi->drv_priv = priv;
+	wmi->stopped = false;
+	mutex_init(&wmi->op_mutex);
+	init_completion(&wmi->cmd_wait);
+
+	return wmi;
+}
+
+void ath9k_deinit_wmi(struct ath9k_htc_priv *priv)
+{
+	struct wmi *wmi = priv->wmi;
+
+	mutex_lock(&wmi->op_mutex);
+	wmi->stopped = true;
+	mutex_unlock(&wmi->op_mutex);
+
+	kfree(priv->wmi);
+}
+
+void ath9k_wmi_tasklet(unsigned long data)
+{
+	struct ath9k_htc_priv *priv = (struct ath9k_htc_priv *)data;
+	struct ath_common *common = ath9k_hw_common(priv->ah);
+	struct wmi_cmd_hdr *hdr;
+	struct wmi_swba *swba_hdr;
+	enum wmi_event_id event;
+	struct sk_buff *skb;
+	void *wmi_event;
+	unsigned long flags;
+#ifdef CONFIG_ATH9K_HTC_DEBUGFS
+	u32 txrate;
+#endif
+
+	spin_lock_irqsave(&priv->wmi->wmi_lock, flags);
+	skb = priv->wmi->wmi_skb;
+	spin_unlock_irqrestore(&priv->wmi->wmi_lock, flags);
+
+	hdr = (struct wmi_cmd_hdr *) skb->data;
+	event = be16_to_cpu(hdr->command_id);
+	wmi_event = skb_pull(skb, sizeof(struct wmi_cmd_hdr));
+
+	ath_print(common, ATH_DBG_WMI,
+		  "WMI Event: 0x%x\n", event);
+
+	switch (event) {
+	case WMI_TGT_RDY_EVENTID:
+		break;
+	case WMI_SWBA_EVENTID:
+		swba_hdr = (struct wmi_swba *) wmi_event;
+		ath9k_htc_swba(priv, swba_hdr->beacon_pending);
+		break;
+	case WMI_FATAL_EVENTID:
+		break;
+	case WMI_TXTO_EVENTID:
+		break;
+	case WMI_BMISS_EVENTID:
+		break;
+	case WMI_WLAN_TXCOMP_EVENTID:
+		break;
+	case WMI_DELBA_EVENTID:
+		break;
+	case WMI_TXRATE_EVENTID:
+#ifdef CONFIG_ATH9K_HTC_DEBUGFS
+		txrate = ((struct wmi_event_txrate *)wmi_event)->txrate;
+		priv->debug.txrate = be32_to_cpu(txrate);
+#endif
+		break;
+	default:
+		break;
+	}
+
+	dev_kfree_skb_any(skb);
+}
+
+static void ath9k_wmi_rsp_callback(struct wmi *wmi, struct sk_buff *skb)
+{
+	skb_pull(skb, sizeof(struct wmi_cmd_hdr));
+
+	if (wmi->cmd_rsp_buf != NULL && wmi->cmd_rsp_len != 0)
+		memcpy(wmi->cmd_rsp_buf, skb->data, wmi->cmd_rsp_len);
+
+	complete(&wmi->cmd_wait);
+}
+
+static void ath9k_wmi_ctrl_rx(void *priv, struct sk_buff *skb,
+			      enum htc_endpoint_id epid)
+{
+	struct wmi *wmi = (struct wmi *) priv;
+	struct wmi_cmd_hdr *hdr;
+	u16 cmd_id;
+
+	if (unlikely(wmi->stopped))
+		goto free_skb;
+
+	hdr = (struct wmi_cmd_hdr *) skb->data;
+	cmd_id = be16_to_cpu(hdr->command_id);
+
+	if (cmd_id & 0x1000) {
+		spin_lock(&wmi->wmi_lock);
+		wmi->wmi_skb = skb;
+		spin_unlock(&wmi->wmi_lock);
+		tasklet_schedule(&wmi->drv_priv->wmi_tasklet);
+		return;
+	}
+
+	/* WMI command response */
+	ath9k_wmi_rsp_callback(wmi, skb);
+
+free_skb:
+	dev_kfree_skb_any(skb);
+}
+
+static void ath9k_wmi_ctrl_tx(void *priv, struct sk_buff *skb,
+			      enum htc_endpoint_id epid, bool txok)
+{
+	dev_kfree_skb_any(skb);
+}
+
+int ath9k_wmi_connect(struct htc_target *htc, struct wmi *wmi,
+		      enum htc_endpoint_id *wmi_ctrl_epid)
+{
+	struct htc_service_connreq connect;
+	int ret;
+
+	wmi->htc = htc;
+
+	memset(&connect, 0, sizeof(connect));
+
+	connect.ep_callbacks.priv = wmi;
+	connect.ep_callbacks.tx = ath9k_wmi_ctrl_tx;
+	connect.ep_callbacks.rx = ath9k_wmi_ctrl_rx;
+	connect.service_id = WMI_CONTROL_SVC;
+
+	ret = htc_connect_service(htc, &connect, &wmi->ctrl_epid);
+	if (ret)
+		return ret;
+
+	*wmi_ctrl_epid = wmi->ctrl_epid;
+
+	return 0;
+}
+
+static int ath9k_wmi_cmd_issue(struct wmi *wmi,
+			       struct sk_buff *skb,
+			       enum wmi_cmd_id cmd, u16 len)
+{
+	struct wmi_cmd_hdr *hdr;
+
+	hdr = (struct wmi_cmd_hdr *) skb_push(skb, sizeof(struct wmi_cmd_hdr));
+	hdr->command_id = cpu_to_be16(cmd);
+	hdr->seq_no = cpu_to_be16(++wmi->tx_seq_id);
+
+	return htc_send(wmi->htc, skb, wmi->ctrl_epid, NULL);
+}
+
+int ath9k_wmi_cmd(struct wmi *wmi, enum wmi_cmd_id cmd_id,
+		  u8 *cmd_buf, u32 cmd_len,
+		  u8 *rsp_buf, u32 rsp_len,
+		  u32 timeout)
+{
+	struct ath_hw *ah = wmi->drv_priv->ah;
+	struct ath_common *common = ath9k_hw_common(ah);
+	u16 headroom = sizeof(struct htc_frame_hdr) +
+		       sizeof(struct wmi_cmd_hdr);
+	struct sk_buff *skb;
+	u8 *data;
+	int time_left, ret = 0;
+
+	if (!wmi)
+		return -EINVAL;
+
+	skb = dev_alloc_skb(headroom + cmd_len);
+	if (!skb)
+		return -ENOMEM;
+
+	skb_reserve(skb, headroom);
+
+	if (cmd_len != 0 && cmd_buf != NULL) {
+		data = (u8 *) skb_put(skb, cmd_len);
+		memcpy(data, cmd_buf, cmd_len);
+	}
+
+	mutex_lock(&wmi->op_mutex);
+
+	/* check if wmi stopped flag is set */
+	if (unlikely(wmi->stopped)) {
+		ret = -EPROTO;
+		goto out;
+	}
+
+	/* record the rsp buffer and length */
+	wmi->cmd_rsp_buf = rsp_buf;
+	wmi->cmd_rsp_len = rsp_len;
+
+	ret = ath9k_wmi_cmd_issue(wmi, skb, cmd_id, cmd_len);
+	if (ret)
+		goto out;
+
+	time_left = wait_for_completion_timeout(&wmi->cmd_wait, timeout);
+	if (!time_left) {
+		ath_print(common, ATH_DBG_WMI,
+			  "Timeout waiting for WMI command: %s\n",
+			  wmi_cmd_to_name(cmd_id));
+		mutex_unlock(&wmi->op_mutex);
+		return -ETIMEDOUT;
+	}
+
+	mutex_unlock(&wmi->op_mutex);
+
+	return 0;
+
+out:
+	ath_print(common, ATH_DBG_WMI,
+		  "WMI failure for: %s\n", wmi_cmd_to_name(cmd_id));
+	mutex_unlock(&wmi->op_mutex);
+	dev_kfree_skb_any(skb);
+
+	return ret;
+}