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@xxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/hw.c | 13 +++++++++++++
drivers/net/wireless/ath/ath9k/hw.h | 1 +
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 4615fd9..baa2977 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -671,6 +671,19 @@ 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 ad8c2c7..ef79f4c 100644
--- a/drivers/net/wireless/ath/ath9k/hw.h
+++ b/drivers/net/wireless/ath/ath9k/hw.h
@@ -929,6 +929,7 @@ 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 4df5659..264aea7 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)
--
1.6.3.3
--
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