[PATCH] ipw2200: Bluetooth coexistence support

I've added a new module param "bt_coexist" which defaults to OFF.

This does not seem to fix the firmware restarts, but it does do "the
right thing" and disables something that we were enabling by default:
signaling the Bluetooth h/w which channel we're on (whether or not the
BT h/w was out there).

Signed-off-by: Ben M Cahill <ben.m.cahill@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 19 insertions, 1 deletions

diff --git a/drivers/net/wireless/ipw2200.c b/drivers/net/wireless/ipw2200.c
index 671631831226..e6a23c2be1af 100644
--- a/drivers/net/wireless/ipw2200.c
+++ b/drivers/net/wireless/ipw2200.c
@@ -55,6 +55,7 @@ static int associate = 1;
 static int auto_create = 1;
 static int led = 0;
 static int disable = 0;
+static int bt_coexist = 0;
 static int hwcrypto = 1;
 static const char ipw_modes[] = {
         'a', 'b', 'g', '?'
@@ -9656,7 +9657,7 @@ static struct iw_statistics *ipw_get_wireless_stats(struct net_device *dev)
 static  void init_sys_config(struct ipw_sys_config *sys_config)
 {
         memset(sys_config, 0, sizeof(struct ipw_sys_config));
-        sys_config->bt_coexistence = 1; /* We may need to look into prvStaBtConfig */
+        sys_config->bt_coexistence = 0;
         sys_config->answer_broadcast_ssid_probe = 0;
         sys_config->accept_all_data_frames = 0;
         sys_config->accept_non_directed_frames = 1;
@@ -10362,6 +10363,20 @@ static int ipw_config(struct ipw_priv *priv)
 
         /* set basic system config settings */
         init_sys_config(&priv->sys_config);
+
+        /* Support Bluetooth if we have BT h/w on board, and user wants to.
+         * Does not support BT priority yet (don't abort or defer our Tx) */
+        if (bt_coexist) {
+                unsigned char bt_caps = priv->eeprom[EEPROM_SKU_CAPABILITY];    
+
+                if (bt_caps & EEPROM_SKU_CAP_BT_CHANNEL_SIG)
+                        priv->sys_config.bt_coexistence
+                                |= CFG_BT_COEXISTENCE_SIGNAL_CHNL;
+                if (bt_caps & EEPROM_SKU_CAP_BT_OOB)
+                        priv->sys_config.bt_coexistence
+                                |= CFG_BT_COEXISTENCE_OOB;
+        }
+
         if (priv->ieee->iw_mode == IW_MODE_ADHOC)
                 priv->sys_config.answer_broadcast_ssid_probe = 1;
         else
@@ -11351,6 +11366,9 @@ module_param(mode, int, 0444);
 MODULE_PARM_DESC(mode, "network mode (0=BSS,1=IBSS)");
 #endif
 
+module_param(bt_coexist, int, 0444);
+MODULE_PARM_DESC(bt_coexist, "enable bluetooth coexistence (default off)");
+
 module_param(hwcrypto, int, 0444);
 MODULE_PARM_DESC(hwcrypto, "enable hardware crypto (default on)");