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ath5k: do not re-run AGC calibration periodically 

All other Atheros drivers run the AGC gain calibration and DC offset
calibration only after reset. Running them periodically has caused stability
issues on some (primarily AR2315/2413/5413/5414 based) devices, leading to
messages such as:

ath5k phy0: gain calibration timeout (2462MHz)
ath5k phy0: calibration of channel 11 failed

Related bug reports:
https://dev.openwrt.org/ticket/10574
https://bugzilla.redhat.com/show_bug.cgi?id=795141

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2012-03-06 11:06:38 +01:00 committed by John W. Linville
parent 62e2c102cc
commit 5c17ddc4a0
1 changed files with 8 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/net/wireless/ath/ath5k/phy.c
View File

@ -1871,31 +1871,15 @@ ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
ret = 0;
}
/* On full calibration do an AGC calibration and
* request a PAPD probe for gainf calibration if
* needed */
if (ah->ah_cal_mask & AR5K_CALIBRATION_FULL) {
/* On full calibration request a PAPD probe for
* gainf calibration if needed */
if ((ah->ah_cal_mask & AR5K_CALIBRATION_FULL) &&
(ah->ah_radio == AR5K_RF5111 ||
ah->ah_radio == AR5K_RF5112) &&
channel->hw_value != AR5K_MODE_11B)
ath5k_hw_request_rfgain_probe(ah);
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_CAL);
ret = ath5k_hw_register_timeout(ah, AR5K_PHY_AGCCTL,
AR5K_PHY_AGCCTL_CAL | AR5K_PHY_AGCCTL_NF,
0, false);
if (ret) {
ATH5K_ERR(ah,
"gain calibration timeout (%uMHz)\n",
channel->center_freq);
}
if ((ah->ah_radio == AR5K_RF5111 ||
ah->ah_radio == AR5K_RF5112)
&& (channel->hw_value != AR5K_MODE_11B))
ath5k_hw_request_rfgain_probe(ah);
}
/* Update noise floor
* XXX: Only do this after AGC calibration */
/* Update noise floor */
if (!(ah->ah_cal_mask & AR5K_CALIBRATION_NF))
ath5k_hw_update_noise_floor(ah);