From 06702a735eacf8679e9ff0d49eb3c989bc6b96ce Mon Sep 17 00:00:00 2001 From: Wey-Yi Guy Date: Fri, 22 Jan 2010 14:22:51 -0800 Subject: iwlwifi: module parameter to enable/disable bt co-exist Adding "bt_coex_active" module parameter for iwlcore to enable/disable BT coexist; if bt_coex_active is true (default), uCode will do kill/defer every time the priority line is asserted (BT is sending signals on the priority line in the PCIx). By disable the bt_coex_active, uCode will ignore the BT activity and perform the normal operation. Users might experience transmit issue on some platform due to this WiFi/BT co-exist problem. The possible symptoms are: NetworkManager and other similar programs can scan and find all the available APs, but will timeout and unable to associate with any of the APs; no out-going frames can be found with wireless sniffer tools. On those platforms, WiFi communication can be restored by set "bt_coex_active" module parameter to "false" Signed-off-by: Wey-Yi Guy Signed-off-by: Reinette Chatre Signed-off-by: John W. Linville --- drivers/net/wireless/iwlwifi/iwl-commands.h | 3 +++ drivers/net/wireless/iwlwifi/iwl-core.c | 29 ++++++++++++++++++++++++++++- 2 files changed, 31 insertions(+), 1 deletion(-) diff --git a/drivers/net/wireless/iwlwifi/iwl-commands.h b/drivers/net/wireless/iwlwifi/iwl-commands.h index ce538946f3f..c2f31eb26be 100644 --- a/drivers/net/wireless/iwlwifi/iwl-commands.h +++ b/drivers/net/wireless/iwlwifi/iwl-commands.h @@ -2261,6 +2261,9 @@ struct iwl_link_quality_cmd { #define BT_ENABLE_PRIORITY BIT(1) #define BT_ENABLE_2_WIRE BIT(2) +#define BT_COEX_DISABLE (0x0) +#define BT_COEX_ENABLE (BT_ENABLE_CHANNEL_ANNOUNCE | BT_ENABLE_PRIORITY) + #define BT_LEAD_TIME_MIN (0x0) #define BT_LEAD_TIME_DEF (0x1E) #define BT_LEAD_TIME_MAX (0xFF) diff --git a/drivers/net/wireless/iwlwifi/iwl-core.c b/drivers/net/wireless/iwlwifi/iwl-core.c index d625aa8fe7a..1cfabd6be0b 100644 --- a/drivers/net/wireless/iwlwifi/iwl-core.c +++ b/drivers/net/wireless/iwlwifi/iwl-core.c @@ -47,6 +47,26 @@ MODULE_VERSION(IWLWIFI_VERSION); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_LICENSE("GPL"); +/* + * set bt_coex_active to true, uCode will do kill/defer + * every time the priority line is asserted (BT is sending signals on the + * priority line in the PCIx). + * set bt_coex_active to false, uCode will ignore the BT activity and + * perform the normal operation + * + * User might experience transmit issue on some platform due to WiFi/BT + * co-exist problem. The possible behaviors are: + * Able to scan and finding all the available AP + * Not able to associate with any AP + * On those platforms, WiFi communication can be restored by set + * "bt_coex_active" module parameter to "false" + * + * default: bt_coex_active = true (BT_COEX_ENABLE) + */ +static bool bt_coex_active = true; +module_param(bt_coex_active, bool, S_IRUGO); +MODULE_PARM_DESC(bt_coex_active, "enable wifi/bluetooth co-exist\n"); + static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = { {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP, 0, COEX_UNASSOC_IDLE_FLAGS}, @@ -1977,13 +1997,20 @@ EXPORT_SYMBOL(iwl_isr_legacy); int iwl_send_bt_config(struct iwl_priv *priv) { struct iwl_bt_cmd bt_cmd = { - .flags = BT_ENABLE_CHANNEL_ANNOUNCE | BT_ENABLE_PRIORITY, .lead_time = BT_LEAD_TIME_DEF, .max_kill = BT_MAX_KILL_DEF, .kill_ack_mask = 0, .kill_cts_mask = 0, }; + if (!bt_coex_active) + bt_cmd.flags = BT_COEX_DISABLE; + else + bt_cmd.flags = BT_COEX_ENABLE; + + IWL_DEBUG_INFO(priv, "BT coex %s\n", + (bt_cmd.flags == BT_COEX_DISABLE) ? "disable" : "active"); + return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG, sizeof(struct iwl_bt_cmd), &bt_cmd); } -- cgit v1.2.3