htc_drv_gpio.c revision 21cb987914cb5334af78378141efed77505ea987 
1#include "htc.h"
2
3/******************/
4/*     BTCOEX     */
5/******************/
6
7/*
8 * Detects if there is any priority bt traffic
9 */
10static void ath_detect_bt_priority(struct ath9k_htc_priv *priv)
11{
12	struct ath_btcoex *btcoex = &priv->btcoex;
13	struct ath_hw *ah = priv->ah;
14
15	if (ath9k_hw_gpio_get(ah, ah->btcoex_hw.btpriority_gpio))
16		btcoex->bt_priority_cnt++;
17
18	if (time_after(jiffies, btcoex->bt_priority_time +
19			msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
20		priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN);
21		/* Detect if colocated bt started scanning */
22		if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
23			ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
24				  "BT scan detected");
25			priv->op_flags |= (OP_BT_SCAN |
26					 OP_BT_PRIORITY_DETECTED);
27		} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
28			ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
29				    "BT priority traffic detected");
30			priv->op_flags |= OP_BT_PRIORITY_DETECTED;
31		}
32
33		btcoex->bt_priority_cnt = 0;
34		btcoex->bt_priority_time = jiffies;
35	}
36}
37
38/*
39 * This is the master bt coex work which runs for every
40 * 45ms, bt traffic will be given priority during 55% of this
41 * period while wlan gets remaining 45%
42 */
43static void ath_btcoex_period_work(struct work_struct *work)
44{
45	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
46						   coex_period_work.work);
47	struct ath_btcoex *btcoex = &priv->btcoex;
48	struct ath_common *common = ath9k_hw_common(priv->ah);
49	u32 timer_period;
50	bool is_btscan;
51	int ret;
52	u8 cmd_rsp, aggr;
53
54	ath_detect_bt_priority(priv);
55
56	is_btscan = !!(priv->op_flags & OP_BT_SCAN);
57
58	aggr = priv->op_flags & OP_BT_PRIORITY_DETECTED;
59
60	WMI_CMD_BUF(WMI_AGGR_LIMIT_CMD, &aggr);
61
62	ath9k_cmn_btcoex_bt_stomp(common, is_btscan ? ATH_BTCOEX_STOMP_ALL :
63			btcoex->bt_stomp_type);
64
65	timer_period = is_btscan ? btcoex->btscan_no_stomp :
66		btcoex->btcoex_no_stomp;
67	ieee80211_queue_delayed_work(priv->hw, &priv->duty_cycle_work,
68				     msecs_to_jiffies(timer_period));
69	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work,
70				     msecs_to_jiffies(btcoex->btcoex_period));
71}
72
73/*
74 * Work to time slice between wlan and bt traffic and
75 * configure weight registers
76 */
77static void ath_btcoex_duty_cycle_work(struct work_struct *work)
78{
79	struct ath9k_htc_priv *priv = container_of(work, struct ath9k_htc_priv,
80						   duty_cycle_work.work);
81	struct ath_hw *ah = priv->ah;
82	struct ath_btcoex *btcoex = &priv->btcoex;
83	struct ath_common *common = ath9k_hw_common(ah);
84	bool is_btscan = priv->op_flags & OP_BT_SCAN;
85
86	ath_print(common, ATH_DBG_BTCOEX,
87		  "time slice work for bt and wlan\n");
88
89	if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW || is_btscan)
90		ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_NONE);
91	else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
92		ath9k_cmn_btcoex_bt_stomp(common, ATH_BTCOEX_STOMP_LOW);
93}
94
95void ath_htc_init_btcoex_work(struct ath9k_htc_priv *priv)
96{
97	struct ath_btcoex *btcoex = &priv->btcoex;
98
99	btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
100	btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) *
101		btcoex->btcoex_period / 100;
102	btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) *
103				   btcoex->btcoex_period / 100;
104	INIT_DELAYED_WORK(&priv->coex_period_work, ath_btcoex_period_work);
105	INIT_DELAYED_WORK(&priv->duty_cycle_work, ath_btcoex_duty_cycle_work);
106}
107
108/*
109 * (Re)start btcoex work
110 */
111
112void ath_htc_resume_btcoex_work(struct ath9k_htc_priv *priv)
113{
114	struct ath_btcoex *btcoex = &priv->btcoex;
115	struct ath_hw *ah = priv->ah;
116
117	ath_print(ath9k_hw_common(ah), ATH_DBG_BTCOEX,
118		  "Starting btcoex work");
119
120	btcoex->bt_priority_cnt = 0;
121	btcoex->bt_priority_time = jiffies;
122	priv->op_flags &= ~(OP_BT_PRIORITY_DETECTED | OP_BT_SCAN);
123	ieee80211_queue_delayed_work(priv->hw, &priv->coex_period_work, 0);
124}
125
126
127/*
128 * Cancel btcoex and bt duty cycle work.
129 */
130void ath_htc_cancel_btcoex_work(struct ath9k_htc_priv *priv)
131{
132	cancel_delayed_work_sync(&priv->coex_period_work);
133	cancel_delayed_work_sync(&priv->duty_cycle_work);
134}
135