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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: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2010-01-22 14:22:51 -08:00 committed by John W. Linville
parent dab1c161fe
commit 06702a735e
2 changed files with 31 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireless/iwlwifi/iwl-commands.h
View File

@ -2261,6 +2261,9 @@ struct iwl_link_quality_cmd {
#define BT_ENABLE_PRIORITY BIT(1) #define BT_ENABLE_PRIORITY BIT(1)
#define BT_ENABLE_2_WIRE BIT(2) #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_MIN (0x0)
#define BT_LEAD_TIME_DEF (0x1E) #define BT_LEAD_TIME_DEF (0x1E)
#define BT_LEAD_TIME_MAX (0xFF) #define BT_LEAD_TIME_MAX (0xFF)

29
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -47,6 +47,26 @@ MODULE_VERSION(IWLWIFI_VERSION);
MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR); MODULE_AUTHOR(DRV_COPYRIGHT " " DRV_AUTHOR);
MODULE_LICENSE("GPL"); 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] = { static struct iwl_wimax_coex_event_entry cu_priorities[COEX_NUM_OF_EVENTS] = {
{COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP, {COEX_CU_UNASSOC_IDLE_RP, COEX_CU_UNASSOC_IDLE_WP,
0, COEX_UNASSOC_IDLE_FLAGS}, 0, COEX_UNASSOC_IDLE_FLAGS},
@ -1977,13 +1997,20 @@ EXPORT_SYMBOL(iwl_isr_legacy);
int iwl_send_bt_config(struct iwl_priv *priv) int iwl_send_bt_config(struct iwl_priv *priv)
{ {
struct iwl_bt_cmd bt_cmd = { struct iwl_bt_cmd bt_cmd = {
.flags = BT_ENABLE_CHANNEL_ANNOUNCE | BT_ENABLE_PRIORITY,
.lead_time = BT_LEAD_TIME_DEF, .lead_time = BT_LEAD_TIME_DEF,
.max_kill = BT_MAX_KILL_DEF, .max_kill = BT_MAX_KILL_DEF,
.kill_ack_mask = 0, .kill_ack_mask = 0,
.kill_cts_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, return iwl_send_cmd_pdu(priv, REPLY_BT_CONFIG,
sizeof(struct iwl_bt_cmd), &bt_cmd); sizeof(struct iwl_bt_cmd), &bt_cmd);
} }