- 根目录:
- drivers
- net
- wireless
- ath
- ath9k
- gpio.c
/*
* Copyright (c) 2008-2011 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "ath9k.h"
/********************************/
/* LED functions */
/********************************/
#ifdef CONFIG_MAC80211_LEDS
static void ath_led_brightness(struct led_classdev *led_cdev,
enum led_brightness brightness)
{
struct ath_softc *sc = container_of(led_cdev, struct ath_softc, led_cdev);
ath9k_hw_set_gpio(sc->sc_ah, sc->sc_ah->led_pin, (brightness == LED_OFF));
}
void ath_deinit_leds(struct ath_softc *sc)
{
if (!sc->led_registered)
return;
ath_led_brightness(&sc->led_cdev, LED_OFF);
led_classdev_unregister(&sc->led_cdev);
}
void ath_init_leds(struct ath_softc *sc)
{
int ret;
if (AR_SREV_9100(sc->sc_ah))
return;
if (!led_blink)
sc->led_cdev.default_trigger =
ieee80211_get_radio_led_name(sc->hw);
snprintf(sc->led_name, sizeof(sc->led_name),
"ath9k-%s", wiphy_name(sc->hw->wiphy));
sc->led_cdev.name = sc->led_name;
sc->led_cdev.brightness_set = ath_led_brightness;
ret = led_classdev_register(wiphy_dev(sc->hw->wiphy), &sc->led_cdev);
if (ret < 0)
return;
sc->led_registered = true;
}
void ath_fill_led_pin(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if (AR_SREV_9100(ah) || (ah->led_pin >= 0))
return;
if (AR_SREV_9287(ah))
ah->led_pin = ATH_LED_PIN_9287;
else if (AR_SREV_9485(sc->sc_ah))
ah->led_pin = ATH_LED_PIN_9485;
else if (AR_SREV_9300(sc->sc_ah))
ah->led_pin = ATH_LED_PIN_9300;
else if (AR_SREV_9462(sc->sc_ah) || AR_SREV_9565(sc->sc_ah))
ah->led_pin = ATH_LED_PIN_9462;
else
ah->led_pin = ATH_LED_PIN_DEF;
/* Configure gpio 1 for output */
ath9k_hw_cfg_output(ah, ah->led_pin, AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
/* LED off, active low */
ath9k_hw_set_gpio(ah, ah->led_pin, 1);
}
#endif
/*******************/
/* Rfkill */
/*******************/
static bool ath_is_rfkill_set(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
bool is_blocked;
ath9k_ps_wakeup(sc);
is_blocked = ath9k_hw_gpio_get(ah, ah->rfkill_gpio) ==
ah->rfkill_polarity;
ath9k_ps_restore(sc);
return is_blocked;
}
void ath9k_rfkill_poll_state(struct ieee80211_hw *hw)
{
struct ath_softc *sc = hw->priv;
bool blocked = !!ath_is_rfkill_set(sc);
wiphy_rfkill_set_hw_state(hw->wiphy, blocked);
}
void ath_start_rfkill_poll(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if (ah->caps.hw_caps & ATH9K_HW_CAP_RFSILENT)
wiphy_rfkill_start_polling(sc->hw->wiphy);
}
#ifdef CONFIG_ATH9K_BTCOEX_SUPPORT
/******************/
/* BTCOEX */
/******************/
/*
* Detects if there is any priority bt traffic
*/
static void ath_detect_bt_priority(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
if (ath9k_hw_gpio_get(sc->sc_ah, ah->btcoex_hw.btpriority_gpio))
btcoex->bt_priority_cnt++;
if (time_after(jiffies, btcoex->bt_priority_time +
msecs_to_jiffies(ATH_BT_PRIORITY_TIME_THRESHOLD))) {
clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
clear_bit(BT_OP_SCAN, &btcoex->op_flags);
/* Detect if colocated bt started scanning */
if (btcoex->bt_priority_cnt >= ATH_BT_CNT_SCAN_THRESHOLD) {
ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
"BT scan detected\n");
set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
set_bit(BT_OP_SCAN, &btcoex->op_flags);
} else if (btcoex->bt_priority_cnt >= ATH_BT_CNT_THRESHOLD) {
ath_dbg(ath9k_hw_common(sc->sc_ah), BTCOEX,
"BT priority traffic detected\n");
set_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
}
btcoex->bt_priority_cnt = 0;
btcoex->bt_priority_time = jiffies;
}
}
static void ath9k_gen_timer_start(struct ath_hw *ah,
struct ath_gen_timer *timer,
u32 trig_timeout,
u32 timer_period)
{
ath9k_hw_gen_timer_start(ah, timer, trig_timeout, timer_period);
if ((ah->imask & ATH9K_INT_GENTIMER) == 0) {
ath9k_hw_disable_interrupts(ah);
ah->imask |= ATH9K_INT_GENTIMER;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
}
}
static void ath9k_gen_timer_stop(struct ath_hw *ah, struct ath_gen_timer *timer)
{
struct ath_gen_timer_table *timer_table = &ah->hw_gen_timers;
ath9k_hw_gen_timer_stop(ah, timer);
/* if no timer is enabled, turn off interrupt mask */
if (timer_table->timer_mask.val == 0) {
ath9k_hw_disable_interrupts(ah);
ah->imask &= ~ATH9K_INT_GENTIMER;
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
}
}
static void ath_mci_ftp_adjust(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_mci_profile *mci = &btcoex->mci;
struct ath_hw *ah = sc->sc_ah;
if (btcoex->bt_wait_time > ATH_BTCOEX_RX_WAIT_TIME) {
if (ar9003_mci_state(ah, MCI_STATE_NEED_FTP_STOMP) &&
(mci->num_pan || mci->num_other_acl))
ah->btcoex_hw.mci.stomp_ftp =
(sc->rx.num_pkts < ATH_BTCOEX_STOMP_FTP_THRESH);
else
ah->btcoex_hw.mci.stomp_ftp = false;
btcoex->bt_wait_time = 0;
sc->rx.num_pkts = 0;
}
}
/*
* This is the master bt coex timer which runs for every
* 45ms, bt traffic will be given priority during 55% of this
* period while wlan gets remaining 45%
*/
static void ath_btcoex_period_timer(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *) data;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
enum ath_stomp_type stomp_type;
u32 timer_period;
unsigned long flags;
spin_lock_irqsave(&sc->sc_pm_lock, flags);
if (sc->sc_ah->power_mode == ATH9K_PM_NETWORK_SLEEP) {
btcoex->bt_wait_time += btcoex->btcoex_period;
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
goto skip_hw_wakeup;
}
spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
ath9k_mci_update_rssi(sc);
ath9k_ps_wakeup(sc);
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
ath_detect_bt_priority(sc);
if (ah->caps.hw_caps & ATH9K_HW_CAP_MCI)
ath_mci_ftp_adjust(sc);
spin_lock_bh(&btcoex->btcoex_lock);
stomp_type = btcoex->bt_stomp_type;
timer_period = btcoex->btcoex_no_stomp;
if (!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI)) {
if (test_bit(BT_OP_SCAN, &btcoex->op_flags)) {
stomp_type = ATH_BTCOEX_STOMP_ALL;
timer_period = btcoex->btscan_no_stomp;
}
} else if (btcoex->stomp_audio >= 5) {
stomp_type = ATH_BTCOEX_STOMP_AUDIO;
btcoex->stomp_audio = 0;
}
ath9k_hw_btcoex_bt_stomp(ah, stomp_type);
ath9k_hw_btcoex_enable(ah);
spin_unlock_bh(&btcoex->btcoex_lock);
/*
* btcoex_period is in msec while (btocex/btscan_)no_stomp are in usec,
* ensure that we properly convert btcoex_period to usec
* for any comparision with (btcoex/btscan_)no_stomp.
*/
if (btcoex->btcoex_period * 1000 != btcoex->btcoex_no_stomp) {
if (btcoex->hw_timer_enabled)
ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
ath9k_gen_timer_start(ah, btcoex->no_stomp_timer, timer_period,
timer_period * 10);
btcoex->hw_timer_enabled = true;
}
ath9k_ps_restore(sc);
skip_hw_wakeup:
mod_timer(&btcoex->period_timer,
jiffies + msecs_to_jiffies(btcoex->btcoex_period));
}
/*
* Generic tsf based hw timer which configures weight
* registers to time slice between wlan and bt traffic
*/
static void ath_btcoex_no_stomp_timer(void *arg)
{
struct ath_softc *sc = (struct ath_softc *)arg;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_common *common = ath9k_hw_common(ah);
ath_dbg(common, BTCOEX, "no stomp timer running\n");
ath9k_ps_wakeup(sc);
spin_lock_bh(&btcoex->btcoex_lock);
if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_LOW ||
(!(ah->caps.hw_caps & ATH9K_HW_CAP_MCI) &&
test_bit(BT_OP_SCAN, &btcoex->op_flags)))
ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
else if (btcoex->bt_stomp_type == ATH_BTCOEX_STOMP_ALL)
ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_LOW);
ath9k_hw_btcoex_enable(ah);
spin_unlock_bh(&btcoex->btcoex_lock);
ath9k_ps_restore(sc);
}
static int ath_init_btcoex_timer(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
btcoex->btcoex_period = ATH_BTCOEX_DEF_BT_PERIOD;
btcoex->btcoex_no_stomp = (100 - ATH_BTCOEX_DEF_DUTY_CYCLE) * 1000 *
btcoex->btcoex_period / 100;
btcoex->btscan_no_stomp = (100 - ATH_BTCOEX_BTSCAN_DUTY_CYCLE) * 1000 *
btcoex->btcoex_period / 100;
setup_timer(&btcoex->period_timer, ath_btcoex_period_timer,
(unsigned long) sc);
spin_lock_init(&btcoex->btcoex_lock);
btcoex->no_stomp_timer = ath_gen_timer_alloc(sc->sc_ah,
ath_btcoex_no_stomp_timer,
ath_btcoex_no_stomp_timer,
(void *) sc, AR_FIRST_NDP_TIMER);
if (!btcoex->no_stomp_timer)
return -ENOMEM;
return 0;
}
/*
* (Re)start btcoex timers
*/
void ath9k_btcoex_timer_resume(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
ath_dbg(ath9k_hw_common(ah), BTCOEX, "Starting btcoex timers\n");
/* make sure duty cycle timer is also stopped when resuming */
if (btcoex->hw_timer_enabled) {
ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
btcoex->hw_timer_enabled = false;
}
btcoex->bt_priority_cnt = 0;
btcoex->bt_priority_time = jiffies;
clear_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags);
clear_bit(BT_OP_SCAN, &btcoex->op_flags);
mod_timer(&btcoex->period_timer, jiffies);
}
/*
* Pause btcoex timer and bt duty cycle timer
*/
void ath9k_btcoex_timer_pause(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_hw *ah = sc->sc_ah;
del_timer_sync(&btcoex->period_timer);
if (btcoex->hw_timer_enabled) {
ath9k_gen_timer_stop(ah, btcoex->no_stomp_timer);
btcoex->hw_timer_enabled = false;
}
}
void ath9k_btcoex_stop_gen_timer(struct ath_softc *sc)
{
struct ath_btcoex *btcoex = &sc->btcoex;
if (btcoex->hw_timer_enabled) {
ath9k_gen_timer_stop(sc->sc_ah, btcoex->no_stomp_timer);
btcoex->hw_timer_enabled = false;
}
}
u16 ath9k_btcoex_aggr_limit(struct ath_softc *sc, u32 max_4ms_framelen)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_mci_profile *mci = &sc->btcoex.mci;
u16 aggr_limit = 0;
if ((sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI) && mci->aggr_limit)
aggr_limit = (max_4ms_framelen * mci->aggr_limit) >> 4;
else if (test_bit(BT_OP_PRIORITY_DETECTED, &btcoex->op_flags))
aggr_limit = min((max_4ms_framelen * 3) / 8,
(u32)ATH_AMPDU_LIMIT_MAX);
return aggr_limit;
}
void ath9k_btcoex_handle_interrupt(struct ath_softc *sc, u32 status)
{
struct ath_hw *ah = sc->sc_ah;
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
if (status & ATH9K_INT_GENTIMER)
ath_gen_timer_isr(sc->sc_ah);
if (status & ATH9K_INT_MCI)
ath_mci_intr(sc);
}
void ath9k_start_btcoex(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if ((ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) &&
!ah->btcoex_hw.enabled) {
if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_MCI))
ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
AR_STOMP_LOW_WLAN_WGHT, 0);
else
ath9k_hw_btcoex_set_weight(ah, 0, 0,
ATH_BTCOEX_STOMP_NONE);
ath9k_hw_btcoex_enable(ah);
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_resume(sc);
}
}
void ath9k_stop_btcoex(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if (ah->btcoex_hw.enabled &&
ath9k_hw_get_btcoex_scheme(ah) != ATH_BTCOEX_CFG_NONE) {
if (ath9k_hw_get_btcoex_scheme(ah) == ATH_BTCOEX_CFG_3WIRE)
ath9k_btcoex_timer_pause(sc);
ath9k_hw_btcoex_disable(ah);
if (AR_SREV_9462(ah) || AR_SREV_9565(ah))
ath_mci_flush_profile(&sc->btcoex.mci);
}
}
void ath9k_deinit_btcoex(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
if ((sc->btcoex.no_stomp_timer) &&
ath9k_hw_get_btcoex_scheme(sc->sc_ah) == ATH_BTCOEX_CFG_3WIRE)
ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
if (ath9k_hw_mci_is_enabled(ah))
ath_mci_cleanup(sc);
}
int ath9k_init_btcoex(struct ath_softc *sc)
{
struct ath_txq *txq;
struct ath_hw *ah = sc->sc_ah;
int r;
ath9k_hw_btcoex_init_scheme(ah);
switch (ath9k_hw_get_btcoex_scheme(sc->sc_ah)) {
case ATH_BTCOEX_CFG_NONE:
break;
case ATH_BTCOEX_CFG_2WIRE:
ath9k_hw_btcoex_init_2wire(sc->sc_ah);
break;
case ATH_BTCOEX_CFG_3WIRE:
ath9k_hw_btcoex_init_3wire(sc->sc_ah);
r = ath_init_btcoex_timer(sc);
if (r)
return -1;
txq = sc->tx.txq_map[IEEE80211_AC_BE];
ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
if (ath9k_hw_mci_is_enabled(ah)) {
sc->btcoex.duty_cycle = ATH_BTCOEX_DEF_DUTY_CYCLE;
INIT_LIST_HEAD(&sc->btcoex.mci.info);
r = ath_mci_setup(sc);
if (r)
return r;
ath9k_hw_btcoex_init_mci(ah);
}
break;
default:
WARN_ON(1);
break;
}
return 0;
}
static int ath9k_dump_mci_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
{
struct ath_btcoex *btcoex = &sc->btcoex;
struct ath_mci_profile *mci = &btcoex->mci;
struct ath_hw *ah = sc->sc_ah;
struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
u32 len = 0;
int i;
ATH_DUMP_BTCOEX("Total BT profiles", NUM_PROF(mci));
ATH_DUMP_BTCOEX("MGMT", mci->num_mgmt);
ATH_DUMP_BTCOEX("SCO", mci->num_sco);
ATH_DUMP_BTCOEX("A2DP", mci->num_a2dp);
ATH_DUMP_BTCOEX("HID", mci->num_hid);
ATH_DUMP_BTCOEX("PAN", mci->num_pan);
ATH_DUMP_BTCOEX("ACL", mci->num_other_acl);
ATH_DUMP_BTCOEX("BDR", mci->num_bdr);
ATH_DUMP_BTCOEX("Aggr. Limit", mci->aggr_limit);
ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
ATH_DUMP_BTCOEX("Concurrent Tx", btcoex_hw->mci.concur_tx);
ATH_DUMP_BTCOEX("Concurrent RSSI cnt", btcoex->rssi_count);
len += snprintf(buf + len, size - len, "BT Weights: ");
for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
len += snprintf(buf + len, size - len, "%08x ",
btcoex_hw->bt_weight[i]);
len += snprintf(buf + len, size - len, "\n");
len += snprintf(buf + len, size - len, "WLAN Weights: ");
for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
len += snprintf(buf + len, size - len, "%08x ",
btcoex_hw->wlan_weight[i]);
len += snprintf(buf + len, size - len, "\n");
len += snprintf(buf + len, size - len, "Tx Priorities: ");
for (i = 0; i < ATH_BTCOEX_STOMP_MAX; i++)
len += snprintf(buf + len, size - len, "%08x ",
btcoex_hw->tx_prio[i]);
len += snprintf(buf + len, size - len, "\n");
return len;
}
static int ath9k_dump_legacy_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
{
struct ath_btcoex *btcoex = &sc->btcoex;
u32 len = 0;
ATH_DUMP_BTCOEX("Stomp Type", btcoex->bt_stomp_type);
ATH_DUMP_BTCOEX("BTCoex Period (msec)", btcoex->btcoex_period);
ATH_DUMP_BTCOEX("Duty Cycle", btcoex->duty_cycle);
ATH_DUMP_BTCOEX("BT Wait time", btcoex->bt_wait_time);
return len;
}
int ath9k_dump_btcoex(struct ath_softc *sc, u8 *buf, u32 size)
{
if (ath9k_hw_mci_is_enabled(sc->sc_ah))
return ath9k_dump_mci_btcoex(sc, buf, size);
else
return ath9k_dump_legacy_btcoex(sc, buf, size);
}
#endif /* CONFIG_ATH9K_BTCOEX_SUPPORT */