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Commit 522aaa18 authored by Sujith Manoharan's avatar Sujith Manoharan Committed by John W. Linville
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ath9k: Fix IQ calibration 



This patch fixes a bug in the TX IQ calibration post
processing routine because of which the driver disables
TX IQ correction even though the calibration results
are valid. This fix is applicable for all chips in the
AR9003 family.

Signed-off-by: default avatarSujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 1908861f

drivers/net/wireless/ath/ath9k/ar9003_calib.c

+15 −2
Original line number Original line Diff line number Diff line
@@ -655,8 +655,8 @@ static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah, 
	if (i2_m_q2_a0_d1 > 0x800)

	if (i2_m_q2_a0_d1 > 0x800)

		i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);

		i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);





	if (i2_p_q2_a0_d1 > 0x800)

	if (i2_p_q2_a0_d1 > 0x1000)

		i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);

		i2_p_q2_a0_d1 = -((0x1fff - i2_p_q2_a0_d1) + 1);





	if (iq_corr_a0_d1 > 0x800)

	if (iq_corr_a0_d1 > 0x800)

		iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);

		iq_corr_a0_d1 = -((0xfff - iq_corr_a0_d1) + 1);
@@ -700,6 +700,19 @@ static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah, 
		return false;

		return false;

	}

	}





	if ((i2_p_q2_a0_d0 < 1024) || (i2_p_q2_a0_d0 > 2047) ||

            (i2_p_q2_a1_d0 < 0) || (i2_p_q2_a1_d1 < 0) ||

            (i2_p_q2_a0_d0 <= i2_m_q2_a0_d0) ||

            (i2_p_q2_a0_d0 <= iq_corr_a0_d0) ||

            (i2_p_q2_a0_d1 <= i2_m_q2_a0_d1) ||

            (i2_p_q2_a0_d1 <= iq_corr_a0_d1) ||

            (i2_p_q2_a1_d0 <= i2_m_q2_a1_d0) ||

            (i2_p_q2_a1_d0 <= iq_corr_a1_d0) ||

            (i2_p_q2_a1_d1 <= i2_m_q2_a1_d1) ||

            (i2_p_q2_a1_d1 <= iq_corr_a1_d1)) {

		return false;

	}



	mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;

	mag_a0_d0 = (i2_m_q2_a0_d0 * res_scale) / i2_p_q2_a0_d0;

	phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;

	phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;