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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: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Sujith Manoharan 2014-01-14 13:25:17 +05:30 committed by John W. Linville
parent 1908861f2f
commit 522aaa182a
1 changed files with 15 additions and 2 deletions
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17
drivers/net/wireless/ath/ath9k/ar9003_calib.c
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@ -655,8 +655,8 @@ static bool ar9003_hw_calc_iq_corr(struct ath_hw *ah,
if (i2_m_q2_a0_d1 > 0x800)
i2_m_q2_a0_d1 = -((0xfff - i2_m_q2_a0_d1) + 1);
if (i2_p_q2_a0_d1 > 0x800)
i2_p_q2_a0_d1 = -((0xfff - i2_p_q2_a0_d1) + 1);
if (i2_p_q2_a0_d1 > 0x1000)
i2_p_q2_a0_d1 = -((0x1fff - i2_p_q2_a0_d1) + 1);
if (iq_corr_a0_d1 > 0x800)
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;
}
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;
phs_a0_d0 = (iq_corr_a0_d0 * res_scale) / i2_p_q2_a0_d0;