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Commit f4475a6e authored by Vasanthakumar Thiagarajan's avatar Vasanthakumar Thiagarajan Committed by John W. Linville
Browse files

ath9k_hw: Enable strong signal detection for AR9003 



Attenuation from eeprom is configured into attenuator control
register.

Signed-off-by: default avatarVasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 52a0e247

drivers/net/wireless/ath/ath9k/ar9003_eeprom.c

+79 −0
Original line number Diff line number Diff line
@@ -57,6 +57,8 @@ 
#define SUB_NUM_CTL_MODES_AT_5G_40 2    /* excluding HT40, EXT-OFDM */

#define SUB_NUM_CTL_MODES_AT_2G_40 3    /* excluding HT40, EXT-OFDM, EXT-CCK */



static int ar9003_hw_power_interpolate(int32_t x,

				       int32_t *px, int32_t *py, u_int16_t np);

static const struct ar9300_eeprom ar9300_default = {

	.eepromVersion = 2,

	.templateVersion = 2,
@@ -3443,6 +3445,82 @@ static void ar9003_hw_drive_strength_apply(struct ath_hw *ah) 
	REG_WRITE(ah, AR_PHY_65NM_CH0_BIAS4, reg);

}



static u16 ar9003_hw_atten_chain_get(struct ath_hw *ah, int chain,

				     struct ath9k_channel *chan)

{

	int f[3], t[3];

	u16 value;

	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;



	if (chain >= 0 && chain < 3) {

		if (IS_CHAN_2GHZ(chan))

			return eep->modalHeader2G.xatten1DB[chain];

		else if (eep->base_ext2.xatten1DBLow[chain] != 0) {

			t[0] = eep->base_ext2.xatten1DBLow[chain];

			f[0] = 5180;

			t[1] = eep->modalHeader5G.xatten1DB[chain];

			f[1] = 5500;

			t[2] = eep->base_ext2.xatten1DBHigh[chain];

			f[2] = 5785;

			value = ar9003_hw_power_interpolate((s32) chan->channel,

							    f, t, 3);

			return value;

		} else

			return eep->modalHeader5G.xatten1DB[chain];

	}



	return 0;

}





static u16 ar9003_hw_atten_chain_get_margin(struct ath_hw *ah, int chain,

					    struct ath9k_channel *chan)

{

	int f[3], t[3];

	u16 value;

	struct ar9300_eeprom *eep = &ah->eeprom.ar9300_eep;



	if (chain >= 0 && chain < 3) {

		if (IS_CHAN_2GHZ(chan))

			return eep->modalHeader2G.xatten1Margin[chain];

		else if (eep->base_ext2.xatten1MarginLow[chain] != 0) {

			t[0] = eep->base_ext2.xatten1MarginLow[chain];

			f[0] = 5180;

			t[1] = eep->modalHeader5G.xatten1Margin[chain];

			f[1] = 5500;

			t[2] = eep->base_ext2.xatten1MarginHigh[chain];

			f[2] = 5785;

			value = ar9003_hw_power_interpolate((s32) chan->channel,

							    f, t, 3);

			return value;

		} else

			return eep->modalHeader5G.xatten1Margin[chain];

	}



	return 0;

}



static void ar9003_hw_atten_apply(struct ath_hw *ah, struct ath9k_channel *chan)

{

	int i;

	u16 value;

	unsigned long ext_atten_reg[3] = {AR_PHY_EXT_ATTEN_CTL_0,

					  AR_PHY_EXT_ATTEN_CTL_1,

					  AR_PHY_EXT_ATTEN_CTL_2,

					 };



	/* Test value. if 0 then attenuation is unused. Don't load anything. */

	for (i = 0; i < 3; i++) {

		value = ar9003_hw_atten_chain_get(ah, i, chan);

		REG_RMW_FIELD(ah, ext_atten_reg[i],

			      AR_PHY_EXT_ATTEN_CTL_XATTEN1_DB, value);



		value = ar9003_hw_atten_chain_get_margin(ah, i, chan);

		REG_RMW_FIELD(ah, ext_atten_reg[i],

			      AR_PHY_EXT_ATTEN_CTL_XATTEN1_MARGIN, value);

	}

}



static void ar9003_hw_internal_regulator_apply(struct ath_hw *ah)

{

	int internal_regulator =
@@ -3474,6 +3552,7 @@ static void ath9k_hw_ar9300_set_board_values(struct ath_hw *ah, 
	ar9003_hw_xpa_bias_level_apply(ah, IS_CHAN_2GHZ(chan));

	ar9003_hw_ant_ctrl_apply(ah, IS_CHAN_2GHZ(chan));

	ar9003_hw_drive_strength_apply(ah);

	ar9003_hw_atten_apply(ah, chan);

	ar9003_hw_internal_regulator_apply(ah);

}