ath9k: Add open loop control support
This patch adds Open Loop Control support for Atheros chipsets that
supports open loop power control.
Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath9k/calib.c b/drivers/net/wireless/ath9k/calib.c
index a7ce8c5..e5abe65 100644
--- a/drivers/net/wireless/ath9k/calib.c
+++ b/drivers/net/wireless/ath9k/calib.c
@@ -718,10 +718,39 @@
return nf;
}
+static void ath9k_olc_temp_compensation(struct ath_hw *ah)
+{
+ u32 rddata, i;
+ int delta, currPDADC, regval;
+
+ rddata = REG_READ(ah, AR_PHY_TX_PWRCTRL4);
+
+ currPDADC = MS(rddata, AR_PHY_TX_PWRCTRL_PD_AVG_OUT);
+
+ if (ah->eep_ops->get_eeprom(ah, EEP_DAC_HPWR_5G))
+ delta = (currPDADC - ah->initPDADC + 4) / 8;
+ else
+ delta = (currPDADC - ah->initPDADC + 5) / 10;
+
+ if (delta != ah->PDADCdelta) {
+ ah->PDADCdelta = delta;
+ for (i = 1; i < AR9280_TX_GAIN_TABLE_SIZE; i++) {
+ regval = ah->originalGain[i] - delta;
+ if (regval < 0)
+ regval = 0;
+
+ REG_RMW_FIELD(ah, AR_PHY_TX_GAIN_TBL1 + i * 4,
+ AR_PHY_TX_GAIN, regval);
+ }
+ }
+}
+
bool ath9k_hw_calibrate(struct ath_hw *ah, struct ath9k_channel *chan,
u8 rxchainmask, bool longcal,
bool *isCalDone)
{
+#define OLC_FOR_AR9280_20_LATER (AR_SREV_9280_20_OR_LATER(ah) && \
+ ah->eep_ops->get_eeprom(ah, EEP_OL_PWRCTRL))
struct hal_cal_list *currCal = ah->cal_list_curr;
*isCalDone = true;
@@ -742,6 +771,8 @@
}
if (longcal) {
+ if (OLC_FOR_AR9280_20_LATER)
+ ath9k_olc_temp_compensation(ah);
ath9k_hw_getnf(ah, chan);
ath9k_hw_loadnf(ah, ah->curchan);
ath9k_hw_start_nfcal(ah);