ath9k_htc: Fix AMPDU subframe handling

* Register the driver's maximum ampdu subframe limit to mac80211.
* Cleanup the target capabilities structure and fix an endian issue.
* Fix BTCOEX by sending a command to the target when the BT priority
  changes.
* Bump the required firmware version to 1.1

Signed-off-by: Sujith Manoharan <Sujith.Manoharan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

5 files changed, 35 insertions, 20 deletions

diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.h b/drivers/net/wireless/ath/ath9k/hif_usb.h
index f59df48a86e2..9a52ccc94d12 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.h
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.h
@@ -17,6 +17,9 @@
 #ifndef HTC_USB_H
 #define HTC_USB_H
 
+#define MAJOR_VERSION_REQ 1
+#define MINOR_VERSION_REQ 1
+
 #define IS_AR7010_DEVICE(_v) (((_v) == AR9280_USB) || ((_v) == AR9287_USB))
 
 #define AR9271_FIRMWARE       0x501000
diff --git a/drivers/net/wireless/ath/ath9k/htc.h b/drivers/net/wireless/ath/ath9k/htc.h
index 48a885575085..af9082970845 100644
--- a/drivers/net/wireless/ath/ath9k/htc.h
+++ b/drivers/net/wireless/ath/ath9k/htc.h
@@ -106,15 +106,14 @@ struct tx_beacon_header {
         u16 rev;
 } __packed;
 
+#define MAX_TX_AMPDU_SUBFRAMES_9271 17
+#define MAX_TX_AMPDU_SUBFRAMES_7010 22
+
 struct ath9k_htc_cap_target {
-        u32 flags;
-        u32 flags_ext;
-        u32 ampdu_limit;
+        __be32 ampdu_limit;
         u8 ampdu_subframes;
+        u8 enable_coex;
         u8 tx_chainmask;
-        u8 tx_chainmask_legacy;
-        u8 rtscts_ratecode;
-        u8 protmode;
         u8 pad;
 } __packed;
 
@@ -551,7 +550,8 @@ void ath9k_htc_txep(void *priv, struct sk_buff *skb, enum htc_endpoint_id ep_id,
 void ath9k_htc_beaconep(void *drv_priv, struct sk_buff *skb,
                         enum htc_endpoint_id ep_id, bool txok);
 
-int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv);
+int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv,
+                                u8 enable_coex);
 void ath9k_htc_station_work(struct work_struct *work);
 void ath9k_htc_aggr_work(struct work_struct *work);
 void ath9k_htc_ani_work(struct work_struct *work);
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
index 138f8e1350d4..d051a4263e0c 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_gpio.c
@@ -65,15 +65,13 @@ static void ath_btcoex_period_work(struct work_struct *work)
         u32 timer_period;
         bool is_btscan;
         int ret;
-        u8 cmd_rsp, aggr;
 
         ath_detect_bt_priority(priv);
 
         is_btscan = !!(priv->op_flags & OP_BT_SCAN);
 
-        aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED;
-
-        WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr);
+        ret = ath9k_htc_update_cap_target(priv,
+                                  !!(priv->op_flags & OP_BT_PRIORITY_DETECTED));
         if (ret) {
                 ath_err(common, "Unable to set BTCOEX parameters\n");
                 return;
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 06e043bffaf4..dbf5f959cf9b 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -753,6 +753,12 @@ static void ath9k_set_hw_capab(struct ath9k_htc_priv *priv,
         hw->queues = 4;
         hw->channel_change_time = 5000;
         hw->max_listen_interval = 10;
+
+        if (AR_SREV_9271(priv->ah))
+                hw->max_tx_aggregation_subframes = MAX_TX_AMPDU_SUBFRAMES_9271;
+        else
+                hw->max_tx_aggregation_subframes = MAX_TX_AMPDU_SUBFRAMES_7010;
+
         hw->vif_data_size = sizeof(struct ath9k_htc_vif);
         hw->sta_data_size = sizeof(struct ath9k_htc_sta);
 
@@ -802,6 +808,17 @@ static int ath9k_init_firmware_version(struct ath9k_htc_priv *priv)
                  priv->fw_version_major,
                  priv->fw_version_minor);
 
+        /*
+         * Check if the available FW matches the driver's
+         * required version.
+         */
+        if (priv->fw_version_major != MAJOR_VERSION_REQ ||
+            priv->fw_version_minor != MINOR_VERSION_REQ) {
+                dev_err(priv->dev, "ath9k_htc: Please upgrade to FW version %d.%d\n",
+                        MAJOR_VERSION_REQ, MINOR_VERSION_REQ);
+                return -EINVAL;
+        }
+
         return 0;
 }
 
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 7cff5547b8c0..a6402681d58d 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -563,7 +563,8 @@ static int ath9k_htc_remove_station(struct ath9k_htc_priv *priv,
         return 0;
 }
 
-int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv)
+int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv,
+                                u8 enable_coex)
 {
         struct ath9k_htc_cap_target tcap;
         int ret;
@@ -571,13 +572,9 @@ int ath9k_htc_update_cap_target(struct ath9k_htc_priv *priv)
 
         memset(&tcap, 0, sizeof(struct ath9k_htc_cap_target));
 
-        /* FIXME: Values are hardcoded */
-        tcap.flags = 0x240c40;
-        tcap.flags_ext = 0x80601000;
-        tcap.ampdu_limit = 0xffff0000;
-        tcap.ampdu_subframes = 20;
-        tcap.tx_chainmask_legacy = priv->ah->caps.tx_chainmask;
-        tcap.protmode = 1;
+        tcap.ampdu_limit = cpu_to_be32(0xffff);
+        tcap.ampdu_subframes = priv->hw->max_tx_aggregation_subframes;
+        tcap.enable_coex = enable_coex;
         tcap.tx_chainmask = priv->ah->caps.tx_chainmask;
 
         WMI_CMD_BUF(WMI_TARGET_IC_UPDATE_CMDID, &tcap);
@@ -936,7 +933,7 @@ static int ath9k_htc_start(struct ieee80211_hw *hw)
 
         ath9k_host_rx_init(priv);
 
-        ret = ath9k_htc_update_cap_target(priv);
+        ret = ath9k_htc_update_cap_target(priv, 0);
         if (ret)
                 ath_dbg(common, ATH_DBG_CONFIG,
                         "Failed to update capability in target\n");