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Commit 06702a73 authored by Wey-Yi Guy's avatar Wey-Yi Guy Committed by John W. Linville
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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: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent dab1c161

drivers/net/wireless/iwlwifi/iwl-commands.h

+3 −0
Original line number Diff line number Diff line
@@ -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)

drivers/net/wireless/iwlwifi/iwl-core.c

+28 −1
Original line number Diff line number Diff line
@@ -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);

}