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ath5k: move noise floor calibration into tasklet

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Seperate noise floor calibration from other PHY calibration and move it to the
tasklet. This is the first step to more separation of different calibrations.

Also move out ath5k_hw_request_rfgain_probe(ah) so we have one clean function
for I/Q calibration on 5111x parts.

Signed-off-by: Bruno Randolf <br1@einfach.org>
Acked-by: Nick Kossifidis <mickflemm@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf 2010-05-19 10:31:00 +09:00 committed by John W. Linville
parent ac55952633
commit 9e04a7eb1f
3 changed files with 12 additions and 23 deletions
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1
drivers/net/wireless/ath/ath5k/ath5k.h
View File

@ -1270,6 +1270,7 @@ int ath5k_hw_channel(struct ath5k_hw *ah, struct ieee80211_channel *channel);
void ath5k_hw_init_nfcal_hist(struct ath5k_hw *ah);
int ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel);
void ath5k_hw_update_noise_floor(struct ath5k_hw *ah);
/* Spur mitigation */
bool ath5k_hw_chan_has_spur_noise(struct ath5k_hw *ah,
struct ieee80211_channel *channel);

1
drivers/net/wireless/ath/ath5k/base.c
View File

@ -2807,6 +2807,7 @@ ath5k_tasklet_calibrate(unsigned long data)
ieee80211_frequency_to_channel(
sc->curchan->center_freq));
ath5k_hw_update_noise_floor(ah);
/* Wake queues */
ieee80211_wake_queues(sc->hw);

33
drivers/net/wireless/ath/ath5k/phy.c
View File

@ -1167,7 +1167,7 @@ static s16 ath5k_hw_get_median_noise_floor(struct ath5k_hw *ah)
* The median of the values in the history is then loaded into the
* hardware for its own use for RSSI and CCA measurements.
*/
static void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
{
struct ath5k_eeprom_info *ee = &ah->ah_capabilities.cap_eeprom;
u32 val;
@ -1248,7 +1248,6 @@ static void ath5k_hw_update_noise_floor(struct ath5k_hw *ah)
/*
* Perform a PHY calibration on RF5110
* -Fix BPSK/QAM Constellation (I/Q correction)
* -Calculate Noise Floor
*/
static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
@ -1335,8 +1334,6 @@ static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
return ret;
}
ath5k_hw_update_noise_floor(ah);
/*
* Re-enable RX/TX and beacons
*/
@ -1348,10 +1345,10 @@ static int ath5k_hw_rf5110_calibrate(struct ath5k_hw *ah,
}
/*
* Perform a PHY calibration on RF5111/5112 and newer chips
* Perform I/Q calibration on RF5111/5112 and newer chips
*/
static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
struct ieee80211_channel *channel)
static int
ath5k_hw_rf511x_iq_calibrate(struct ath5k_hw *ah)
{
u32 i_pwr, q_pwr;
s32 iq_corr, i_coff, i_coffd, q_coff, q_coffd;
@ -1360,10 +1357,9 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
if (!ah->ah_calibration ||
ath5k_hw_reg_read(ah, AR5K_PHY_IQ) & AR5K_PHY_IQ_RUN)
goto done;
return 0;
/* Calibration has finished, get the results and re-run */
/* work around empty results which can apparently happen on 5212 */
for (i = 0; i <= 10; i++) {
iq_corr = ath5k_hw_reg_read(ah, AR5K_PHY_IQRES_CAL_CORR);
@ -1384,7 +1380,7 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
/* protect against divide by 0 and loss of sign bits */
if (i_coffd == 0 || q_coffd < 2)
goto done;
return -1;
i_coff = (-iq_corr) / i_coffd;
i_coff = clamp(i_coff, -32, 31); /* signed 6 bit */
@ -1410,17 +1406,6 @@ static int ath5k_hw_rf511x_calibrate(struct ath5k_hw *ah,
AR5K_PHY_IQ_CAL_NUM_LOG_MAX, 15);
AR5K_REG_ENABLE_BITS(ah, AR5K_PHY_IQ, AR5K_PHY_IQ_RUN);
done:
/* TODO: Separate noise floor calibration from I/Q calibration
* since noise floor calibration interrupts rx path while I/Q
* calibration doesn't. We don't need to run noise floor calibration
* as often as I/Q calibration.*/
ath5k_hw_update_noise_floor(ah);
/* Initiate a gain_F calibration */
ath5k_hw_request_rfgain_probe(ah);
return 0;
}
@ -1434,8 +1419,10 @@ int ath5k_hw_phy_calibrate(struct ath5k_hw *ah,
if (ah->ah_radio == AR5K_RF5110)
ret = ath5k_hw_rf5110_calibrate(ah, channel);
else
ret = ath5k_hw_rf511x_calibrate(ah, channel);
else {
ret = ath5k_hw_rf511x_iq_calibrate(ah);
ath5k_hw_request_rfgain_probe(ah);
}
return ret;
}