diff options
| author | Vivek Natarajan <vnatarajan@atheros.com> | 2011-01-27 14:45:07 +0530 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2011-01-28 15:44:28 -0500 |
| commit | b141581923ab4904052174e3b4eb17cc3ce8632c (patch) | |
| tree | 7b6249510e86a8e72cc10c73ab8e6eeecb631917 | |
| parent | 74f7635930bb157b2e83d38a68177a2b28138ead (diff) | |
ath9k_hw: Add a function to read sqsum_dvc.
Add a function to observe the delta VC of BB_PLL.
For a good chip, the sqsum_dvc is below 2000.
Signed-off-by: Vivek Natarajan <vnatarajan@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.c | 13 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/hw.h | 1 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/reg.h | 6 |
3 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c index 48d121c24eb..0e64d766605 100644 --- a/drivers/net/wireless/ath/ath9k/hw.c +++ b/drivers/net/wireless/ath/ath9k/hw.c @@ -668,6 +668,19 @@ 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) +{ + REG_WRITE(ah, PLL3, (REG_READ(ah, PLL3) & ~(PLL3_DO_MEAS_MASK))); + udelay(100); + REG_WRITE(ah, PLL3, (REG_READ(ah, PLL3) | PLL3_DO_MEAS_MASK)); + + while ((REG_READ(ah, PLL4) & PLL4_MEAS_DONE) == 0) + udelay(100); + + return (REG_READ(ah, PLL3) & SQSUM_DVC_MASK) >> 3; +} +EXPORT_SYMBOL(ar9003_get_pll_sqsum_dvc); + static void ath9k_hw_init_pll(struct ath_hw *ah, struct ath9k_channel *chan) { diff --git a/drivers/net/wireless/ath/ath9k/hw.h b/drivers/net/wireless/ath/ath9k/hw.h index c2b3515deea..8c688a12cba 100644 --- a/drivers/net/wireless/ath/ath9k/hw.h +++ b/drivers/net/wireless/ath/ath9k/hw.h @@ -928,6 +928,7 @@ 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); 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, diff --git a/drivers/net/wireless/ath/ath9k/reg.h b/drivers/net/wireless/ath/ath9k/reg.h index 4df5659c6c1..264aea7919e 100644 --- a/drivers/net/wireless/ath/ath9k/reg.h +++ b/drivers/net/wireless/ath/ath9k/reg.h @@ -1129,6 +1129,12 @@ enum { #define AR_RTC_PLL_CLKSEL 0x00000300 #define AR_RTC_PLL_CLKSEL_S 8 +#define PLL3 0x16188 +#define PLL3_DO_MEAS_MASK 0x40000000 +#define PLL4 0x1618c +#define PLL4_MEAS_DONE 0x8 +#define SQSUM_DVC_MASK 0x007ffff8 + #define AR_RTC_RESET \ ((AR_SREV_9100(ah)) ? (AR_RTC_BASE + 0x0040) : 0x7040) #define AR_RTC_RESET_EN (0x00000001) |