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ath9k: Add Bluetooth Coexistence 3-wire support

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This patch adds 3-wire bluetooth coex support for AR9285.
This support can be enabled through btcoex_enable modparam.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vasanthakumar Thiagarajan
2009-08-26 21:08:50 +05:30
committed by John W. Linville
parent ff155a45ce
commit 1773912bd2
9 changed files with 423 additions and 27 deletions
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61
drivers/net/wireless/ath/ath9k/btcoex.h
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@ -20,20 +20,79 @@
#define ATH_WLANACTIVE_GPIO 5
#define ATH_BTACTIVE_GPIO 6
#define ATH_BTCOEX_DEF_BT_PERIOD 45
#define ATH_BTCOEX_DEF_DUTY_CYCLE 55
#define ATH_BTCOEX_BMISS_THRESH 50
#define ATH_BT_PRIORITY_TIME_THRESHOLD 1000 /* ms */
#define ATH_BT_CNT_THRESHOLD 3
enum ath_btcoex_scheme {
ATH_BTCOEX_CFG_NONE,
ATH_BTCOEX_CFG_2WIRE,
ATH_BTCOEX_CFG_3WIRE,
};
enum ath_stomp_type {
ATH_BTCOEX_NO_STOMP,
ATH_BTCOEX_STOMP_ALL,
ATH_BTCOEX_STOMP_LOW,
ATH_BTCOEX_STOMP_NONE
};
enum ath_bt_mode {
ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */
ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */
ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */
ATH_BT_COEX_MODE_DISALBED, /* coexistence disabled */
};
struct ath_btcoex_config {
u8 bt_time_extend;
bool bt_txstate_extend;
bool bt_txframe_extend;
enum ath_bt_mode bt_mode; /* coexistence mode */
bool bt_quiet_collision;
bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
u8 bt_priority_time;
u8 bt_first_slot_time;
bool bt_hold_rx_clear;
};
struct ath_btcoex_info {
enum ath_btcoex_scheme btcoex_scheme;
u8 wlanactive_gpio;
u8 btactive_gpio;
u8 btpriority_gpio;
u8 bt_duty_cycle; /* BT duty cycle in percentage */
int bt_stomp_type; /* Types of BT stomping */
u32 bt_coex_mode; /* Register setting for AR_BT_COEX_MODE */
u32 bt_coex_weights; /* Register setting for AR_BT_COEX_WEIGHT */
u32 bt_coex_mode2; /* Register setting for AR_BT_COEX_MODE2 */
u32 btcoex_no_stomp; /* in usec */
u32 btcoex_period; /* in usec */
u32 bt_priority_cnt;
unsigned long bt_priority_time;
bool hw_timer_enabled;
spinlock_t btcoex_lock;
struct timer_list period_timer; /* Timer for BT period */
struct ath_gen_timer *no_stomp_timer; /*Timer for no BT stomping*/
};
void ath9k_hw_btcoex_init(struct ath_hw *ah);
int ath9k_hw_btcoex_init(struct ath_hw *ah);
void ath9k_hw_btcoex_enable(struct ath_hw *ah);
void ath9k_hw_btcoex_disable(struct ath_hw *ah);
void ath_btcoex_timer_resume(struct ath_softc *sc,
struct ath_btcoex_info *btinfo);
void ath_btcoex_timer_pause(struct ath_softc *sc,
struct ath_btcoex_info *btinfo);
static inline void ath_btcoex_set_weight(struct ath_btcoex_info *btcoex_info,
u32 bt_weight,
u32 wlan_weight)
{
btcoex_info->bt_coex_weights = SM(bt_weight, AR_BTCOEX_BT_WGHT) |
SM(wlan_weight, AR_BTCOEX_WL_WGHT);
}
#endif