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ath9k: Add power save wrappers and modularize hw_pll handler

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We should protect hw_pll handler with power save wrappers and
also modularize hw_pll handler properly for better readability.

Also add a debug message to track chip resets on pll hang condition.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Senthil Balasubramanian 2011-04-22 11:32:12 +05:30 committed by John W. Linville
parent 9eab61c2bf
commit b84628eb57
3 changed files with 26 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/ath/ath9k/hw.c
View File

@ -673,7 +673,7 @@ static void ath9k_hw_init_qos(struct ath_hw *ah)
REGWRITE_BUFFER_FLUSH(ah);
}
unsigned long ar9003_get_pll_sqsum_dvc(struct ath_hw *ah)
u32 ar9003_get_pll_sqsum_dvc(struct ath_hw *ah)
{
REG_CLR_BIT(ah, PLL3, PLL3_DO_MEAS_MASK);
udelay(100);

2
drivers/net/wireless/ath/ath9k/hw.h
View File

@ -932,7 +932,7 @@ void ath9k_hw_settsf64(struct ath_hw *ah, u64 tsf64);
void ath9k_hw_reset_tsf(struct ath_hw *ah);
void ath9k_hw_set_tsfadjust(struct ath_hw *ah, u32 setting);
void ath9k_hw_init_global_settings(struct ath_hw *ah);
unsigned long ar9003_get_pll_sqsum_dvc(struct ath_hw *ah);
u32 ar9003_get_pll_sqsum_dvc(struct ath_hw *ah);
void ath9k_hw_set11nmac2040(struct ath_hw *ah);
void ath9k_hw_beaconinit(struct ath_hw *ah, u32 next_beacon, u32 beacon_period);
void ath9k_hw_set_sta_beacon_timers(struct ath_hw *ah,

34
drivers/net/wireless/ath/ath9k/main.c
View File

@ -624,23 +624,37 @@ out:
ath9k_ps_restore(sc);
}
static void ath_hw_pll_rx_hang_check(struct ath_softc *sc, u32 pll_sqsum)
{
static int count;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
if (pll_sqsum >= 0x40000) {
count++;
if (count == 3) {
/* Rx is hung for more than 500ms. Reset it */
ath_dbg(common, ATH_DBG_RESET,
"Possible RX hang, resetting");
ath_reset(sc, true);
count = 0;
}
} else
count = 0;
}
void ath_hw_pll_work(struct work_struct *work)
{
struct ath_softc *sc = container_of(work, struct ath_softc,
hw_pll_work.work);
static int count;
u32 pll_sqsum;
if (AR_SREV_9485(sc->sc_ah)) {
if (ar9003_get_pll_sqsum_dvc(sc->sc_ah) >= 0x40000) {
count++;
if (count == 3) {
/* Rx is hung for more than 500ms. Reset it */
ath_reset(sc, true);
count = 0;
}
} else
count = 0;
ath9k_ps_wakeup(sc);
pll_sqsum = ar9003_get_pll_sqsum_dvc(sc->sc_ah);
ath9k_ps_restore(sc);
ath_hw_pll_rx_hang_check(sc, pll_sqsum);
ieee80211_queue_delayed_work(sc->hw, &sc->hw_pll_work, HZ/5);
}