From: Sujith <Sujith.Manoharan@atheros.com>
To: <linville@tuxdriver.com>
Cc: <linux-wireless@vger.kernel.org>, <Jouni.Malinen@Atheros.com>,
<Luis.Rodriguez@Atheros.com>
Subject: [PATCH 5/8] ath9k: Initialize AGC calibration properly
Date: Thu, 12 Feb 2009 10:06:49 +0530 [thread overview]
Message-ID: <18835.42849.198425.552819@gargle.gargle.HOWL> (raw)
Signed-off-by: Sujith <Sujith.Manoharan@atheros.com>
---
drivers/net/wireless/ath9k/calib.c | 31 +++++++++++++++++++++++++++++++
drivers/net/wireless/ath9k/phy.h | 4 ++++
2 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/drivers/net/wireless/ath9k/calib.c b/drivers/net/wireless/ath9k/calib.c
index 1fc3a08..a7ce8c5 100644
--- a/drivers/net/wireless/ath9k/calib.c
+++ b/drivers/net/wireless/ath9k/calib.c
@@ -851,6 +851,30 @@ static inline void ath9k_hw_9285_pa_cal(struct ath_hw *ah)
bool ath9k_hw_init_cal(struct ath_hw *ah,
struct ath9k_channel *chan)
{
+ if (AR_SREV_9280_10_OR_LATER(ah)) {
+ REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
+ REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL);
+ REG_CLR_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
+
+ /* Kick off the cal */
+ REG_WRITE(ah, AR_PHY_AGC_CONTROL,
+ REG_READ(ah, AR_PHY_AGC_CONTROL) |
+ AR_PHY_AGC_CONTROL_CAL);
+
+ if (!ath9k_hw_wait(ah, AR_PHY_AGC_CONTROL,
+ AR_PHY_AGC_CONTROL_CAL, 0)) {
+ DPRINTF(ah->ah_sc, ATH_DBG_CALIBRATE,
+ "offset calibration failed to complete in 1ms; "
+ "noisy environment?\n");
+ return false;
+ }
+
+ REG_CLR_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
+ REG_SET_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL);
+ REG_SET_BIT(ah, AR_PHY_CL_CAL_CTL, AR_PHY_CL_CAL_ENABLE);
+ }
+
+ /* Calibrate the AGC */
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_CAL);
@@ -862,9 +886,16 @@ bool ath9k_hw_init_cal(struct ath_hw *ah,
return false;
}
+ if (AR_SREV_9280_10_OR_LATER(ah)) {
+ REG_SET_BIT(ah, AR_PHY_ADC_CTL, AR_PHY_ADC_CTL_OFF_PWDADC);
+ REG_CLR_BIT(ah, AR_PHY_AGC_CONTROL, AR_PHY_AGC_CONTROL_FLTR_CAL);
+ }
+
+ /* Do PA Calibration */
if (AR_SREV_9285(ah) && AR_SREV_9285_11_OR_LATER(ah))
ath9k_hw_9285_pa_cal(ah);
+ /* Do NF Calibration */
REG_WRITE(ah, AR_PHY_AGC_CONTROL,
REG_READ(ah, AR_PHY_AGC_CONTROL) |
AR_PHY_AGC_CONTROL_NF);
diff --git a/drivers/net/wireless/ath9k/phy.h b/drivers/net/wireless/ath9k/phy.h
index 837a598..4758c37 100644
--- a/drivers/net/wireless/ath9k/phy.h
+++ b/drivers/net/wireless/ath9k/phy.h
@@ -485,6 +485,10 @@ bool ath9k_hw_init_rf(struct ath_hw *ah,
#define AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4 0x0FC00000
#define AR_PHY_TPCRG5_PD_GAIN_BOUNDARY_4_S 22
+/* Carrier leak calibration control, do it after AGC calibration */
+#define AR_PHY_CL_CAL_CTL 0xA358
+#define AR_PHY_CL_CAL_ENABLE 0x00000002
+
#define AR_PHY_POWER_TX_RATE5 0xA38C
#define AR_PHY_POWER_TX_RATE6 0xA390
--
1.6.1
reply other threads:[~2009-02-12 4:40 UTC|newest]
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