dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

ath9k_hw: Fix instable target power control b/w CCK/OFDM 

The problem is that when the attenuation is increased,
the rate will start to drop from MCS7 -> MCS6, and finally
will see MCS1 -> CCK_11Mbps. When the rate is changed b/w
CCK and OFDM, it will use register desired_scale to calculate
how much tx gain need to change.

The output power with the same tx gain for CCK and OFDM modulated
signals are different. This difference is constant for AR9280
but not AR9285/AR9271. It has different PA architecture
a constant. So it should be calibrated against this PA
characteristic.

The driver has to read the calibrated values from EEPROM and set
the tx power registers accordingly.

Signed-off-by: Rajkumar Manoharan <rmanoharan@atheros.com>
Acked-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Rajkumar Manoharan 2011-04-06 21:42:52 +05:30 committed by John W. Linville
parent 15b91e830d
commit d88525e8fd
3 changed files with 37 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/net/wireless/ath/ath9k/ar9002_phy.h
View File

@ -483,7 +483,11 @@
#define AR_PHY_TX_PWRCTRL_INIT_TX_GAIN 0x01F80000
#define AR_PHY_TX_PWRCTRL_INIT_TX_GAIN_S 19
#define AR_PHY_TX_PWRCTRL8 0xa278
#define AR_PHY_TX_PWRCTRL9 0xa27C
#define AR_PHY_TX_PWRCTRL10 0xa394
#define AR_PHY_TX_DESIRED_SCALE_CCK 0x00007C00
#define AR_PHY_TX_DESIRED_SCALE_CCK_S 10
#define AR_PHY_TX_PWRCTRL9_RES_DC_REMOVAL 0x80000000
@ -495,6 +499,8 @@
#define AR_PHY_CH0_TX_PWRCTRL11 0xa398
#define AR_PHY_CH1_TX_PWRCTRL11 0xb398
#define AR_PHY_CH0_TX_PWRCTRL12 0xa3dc
#define AR_PHY_CH0_TX_PWRCTRL13 0xa3e0
#define AR_PHY_TX_PWRCTRL_OLPC_TEMP_COMP 0x0000FC00
#define AR_PHY_TX_PWRCTRL_OLPC_TEMP_COMP_S 10

6
drivers/net/wireless/ath/ath9k/eeprom.h
View File

@ -436,7 +436,11 @@ struct modal_eep_4k_header {
u8 db2_2:4, db2_3:4;
u8 db2_4:4, reserved:4;
#endif
u8 futureModal[4];
u8 tx_diversity;
u8 flc_pwr_thresh;
u8 bb_scale_smrt_antenna;
#define EEP_4K_BB_DESIRED_SCALE_MASK 0x1f
u8 futureModal[1];
struct spur_chan spurChans[AR_EEPROM_MODAL_SPURS];
} __packed;

26
drivers/net/wireless/ath/ath9k/eeprom_4k.c
View File

@ -781,6 +781,7 @@ static void ath9k_hw_4k_set_board_values(struct ath_hw *ah,
{
struct modal_eep_4k_header *pModal;
struct ar5416_eeprom_4k *eep = &ah->eeprom.map4k;
struct base_eep_header_4k *pBase = &eep->baseEepHeader;
u8 txRxAttenLocal;
u8 ob[5], db1[5], db2[5];
u8 ant_div_control1, ant_div_control2;
@ -1003,6 +1004,31 @@ static void ath9k_hw_4k_set_board_values(struct ath_hw *ah,
AR_PHY_SETTLING_SWITCH,
pModal->swSettleHt40);
}
if (AR_SREV_9271(ah) || AR_SREV_9285(ah)) {
u8 bb_desired_scale = (pModal->bb_scale_smrt_antenna &
EEP_4K_BB_DESIRED_SCALE_MASK);
if ((pBase->txGainType == 0) && (bb_desired_scale != 0)) {
u32 pwrctrl, mask, clr;
mask = BIT(0)|BIT(5)|BIT(10)|BIT(15)|BIT(20)|BIT(25);
pwrctrl = mask * bb_desired_scale;
clr = mask * 0x1f;
REG_RMW(ah, AR_PHY_TX_PWRCTRL8, pwrctrl, clr);
REG_RMW(ah, AR_PHY_TX_PWRCTRL10, pwrctrl, clr);
REG_RMW(ah, AR_PHY_CH0_TX_PWRCTRL12, pwrctrl, clr);
mask = BIT(0)|BIT(5)|BIT(15);
pwrctrl = mask * bb_desired_scale;
clr = mask * 0x1f;
REG_RMW(ah, AR_PHY_TX_PWRCTRL9, pwrctrl, clr);
mask = BIT(0)|BIT(5);
pwrctrl = mask * bb_desired_scale;
clr = mask * 0x1f;
REG_RMW(ah, AR_PHY_CH0_TX_PWRCTRL11, pwrctrl, clr);
REG_RMW(ah, AR_PHY_CH0_TX_PWRCTRL13, pwrctrl, clr);
}
}
}
static u16 ath9k_hw_4k_get_spur_channel(struct ath_hw *ah, u16 i, bool is2GHz)