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Add an AR5416 workaround - force a different bias based on 2.4ghz channel frequency.

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Obtained from:	Linux ath9k
This commit is contained in:
Adrian Chadd 2011-01-26 10:36:43 +00:00
parent 0ea2e01412
commit b868c6d0b1
2 changed files with 67 additions and 0 deletions
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63
sys/dev/ath/ath_hal/ar5416/ar2133.c
View File

@ -57,6 +57,65 @@ ar2133WriteRegs(struct ath_hal *ah, u_int modesIndex, u_int freqIndex,
freqIndex, writes);
}
/*
* Fix on 2.4 GHz band for orientation sensitivity issue by increasing
* rf_pwd_icsyndiv.
*
* Theoretical Rules:
* if 2 GHz band
* if forceBiasAuto
* if synth_freq < 2412
* bias = 0
* else if 2412 <= synth_freq <= 2422
* bias = 1
* else // synth_freq > 2422
* bias = 2
* else if forceBias > 0
* bias = forceBias & 7
* else
* no change, use value from ini file
* else
* no change, invalid band
*
* 1st Mod:
* 2422 also uses value of 2
* <approved>
*
* 2nd Mod:
* Less than 2412 uses value of 0, 2412 and above uses value of 2
*/
static void
ar2133ForceBias(struct ath_hal *ah, uint16_t synth_freq)
{
uint32_t tmp_reg;
int reg_writes = 0;
uint32_t new_bias = 0;
struct ar2133State *priv = AR2133(ah);
/* XXX this is a bit of a silly check for 2.4ghz channels -adrian */
if (synth_freq >= 3000)
return;
if (synth_freq < 2412)
new_bias = 0;
else if (synth_freq < 2422)
new_bias = 1;
else
new_bias = 2;
/* pre-reverse this field */
tmp_reg = ath_hal_reverseBits(new_bias, 3);
HALDEBUG(ah, HAL_DEBUG_ANY, "%s: Force rf_pwd_icsyndiv to %1d on %4d\n",
__func__, new_bias, synth_freq);
/* swizzle rf_pwd_icsyndiv */
ar5416ModifyRfBuffer(priv->Bank6Data, tmp_reg, 3, 181, 3);
/* write Bank 6 with new params */
ath_hal_ini_bank_write(ah, &AH5416(ah)->ah_ini_bank6, priv->Bank6Data, reg_writes);
}
/*
* Take the MHz channel value and set the Channel value
*
@ -125,6 +184,10 @@ ar2133SetChannel(struct ath_hal *ah, const struct ieee80211_channel *chan)
return AH_FALSE;
}
/* Workaround for hw bug - AR5416 specific */
if (AR_SREV_OWL(ah))
ar2133ForceBias(ah, freq);
reg32 = (channelSel << 8) | (aModeRefSel << 2) | (bModeSynth << 1) |
(1 << 5) | 0x1;

4
sys/dev/ath/ath_hal/ar5416/ar5416reg.h
View File

@ -588,6 +588,10 @@
#define AR_XSREV_REVISION_KITE_11 1 /* Kite 1.1 */
#define AR_XSREV_REVISION_KITE_12 2 /* Kite 1.2 */
#define AR_SREV_OWL(_ah) \
((AH_PRIVATE((_ah))->ah_macVersion == AR_XSREV_VERSION_OWL_PCI) || \
(AH_PRIVATE((_ah))->ah_macVersion == AR_XSREV_VERSION_OWL_PCIE))
#define AR_SREV_OWL_20_OR_LATER(_ah) \
(AH_PRIVATE((_ah))->ah_macVersion >= AR_XSREV_VERSION_SOWL || \
AH_PRIVATE((_ah))->ah_macRev >= AR_XSREV_REVISION_OWL_20)