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ath9k: introduce ath9k_hw_get_scaled_power helper

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The computation of the scaled power value in
various eeprom files uses identical code. Move
that code into a helper function and use that
instead of code duplication.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos 2012-04-14 22:01:58 +02:00 committed by John W. Linville
parent 21bd6ea311
commit ea6f792b2b
5 changed files with 44 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
drivers/net/wireless/ath/ath9k/ar9003_eeprom.c
View File

@ -30,8 +30,6 @@
#define CTL_11A_EXT (CTL_11A | EXT_ADDITIVE)
#define CTL_11G_EXT (CTL_11G | EXT_ADDITIVE)
#define CTL_11B_EXT (CTL_11B | EXT_ADDITIVE)
#define REDUCE_SCALED_POWER_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
#define REDUCE_SCALED_POWER_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
#define PWRINCR_3_TO_1_CHAIN 9 /* 10*log(3)*2 */
#define PWRINCR_3_TO_2_CHAIN 3 /* floor(10*log(3/2)*2) */
#define PWRINCR_2_TO_1_CHAIN 6 /* 10*log(2)*2 */
@ -4789,30 +4787,8 @@ static void ar9003_hw_set_power_per_rate_table(struct ath_hw *ah,
bool is2ghz = IS_CHAN_2GHZ(chan);
ath9k_hw_get_channel_centers(ah, chan, &centers);
scaledPower = powerLimit - antenna_reduction;
/*
* Reduce scaled Power by number of chains active to get
* to per chain tx power level
*/
switch (ar5416_get_ntxchains(ah->txchainmask)) {
case 1:
break;
case 2:
if (scaledPower > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
else
scaledPower = 0;
break;
case 3:
if (scaledPower > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
else
scaledPower = 0;
break;
}
scaledPower = max((u16)0, scaledPower);
scaledPower = ath9k_hw_get_scaled_power(ah, powerLimit,
antenna_reduction);
/*
* Get target powers from EEPROM - our baseline for TX Power

33
drivers/net/wireless/ath/ath9k/eeprom.c
View File

@ -290,6 +290,39 @@ u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
return twiceMaxEdgePower;
}
u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
u8 antenna_reduction)
{
u16 scaled_power;
scaled_power = power_limit - antenna_reduction;
/*
* Reduce scaled Power by number of chains active
* to get the per chain tx power level.
*/
switch (ar5416_get_ntxchains(ah->txchainmask)) {
case 1:
break;
case 2:
if (scaled_power > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
scaled_power -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
else
scaled_power = 0;
break;
case 3:
if (scaled_power > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
scaled_power -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
else
scaled_power = 0;
break;
}
scaled_power = max((u16)0, scaled_power);
return scaled_power;
}
void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah)
{
struct ath_common *common = ath9k_hw_common(ah);

5
drivers/net/wireless/ath/ath9k/eeprom.h
View File

@ -82,6 +82,9 @@
#define INCREASE_MAXPOW_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
#define INCREASE_MAXPOW_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
#define REDUCE_SCALED_POWER_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
#define REDUCE_SCALED_POWER_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
/*
* For AR9285 and later chipsets, the following bits are not being programmed
* in EEPROM and so need to be enabled always.
@ -686,6 +689,8 @@ void ath9k_hw_get_target_powers(struct ath_hw *ah,
u16 numRates, bool isHt40Target);
u16 ath9k_hw_get_max_edge_power(u16 freq, struct cal_ctl_edges *pRdEdgesPower,
bool is2GHz, int num_band_edges);
u16 ath9k_hw_get_scaled_power(struct ath_hw *ah, u16 power_limit,
u8 antenna_reduction);
void ath9k_hw_update_regulatory_maxpower(struct ath_hw *ah);
int ath9k_hw_eeprom_init(struct ath_hw *ah);

30
drivers/net/wireless/ath/ath9k/eeprom_9287.c
View File

@ -564,9 +564,6 @@ static void ath9k_hw_set_ar9287_power_per_rate_table(struct ath_hw *ah,
(((cfgCtl & ~CTL_MODE_M) | (pCtlMode[ctlMode] & CTL_MODE_M)) == \
((pEepData->ctlIndex[i] & CTL_MODE_M) | SD_NO_CTL))
#define REDUCE_SCALED_POWER_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
#define REDUCE_SCALED_POWER_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
u16 twiceMaxEdgePower;
int i;
struct cal_ctl_data_ar9287 *rep;
@ -591,29 +588,8 @@ static void ath9k_hw_set_ar9287_power_per_rate_table(struct ath_hw *ah,
tx_chainmask = ah->txchainmask;
ath9k_hw_get_channel_centers(ah, chan, &centers);
scaledPower = powerLimit - antenna_reduction;
/*
* Reduce scaled Power by number of chains active
* to get the per chain tx power level.
*/
switch (ar5416_get_ntxchains(tx_chainmask)) {
case 1:
break;
case 2:
if (scaledPower > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
else
scaledPower = 0;
break;
case 3:
if (scaledPower > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
else
scaledPower = 0;
break;
}
scaledPower = max((u16)0, scaledPower);
scaledPower = ath9k_hw_get_scaled_power(ah, powerLimit,
antenna_reduction);
/*
* Get TX power from EEPROM.
@ -786,8 +762,6 @@ static void ath9k_hw_set_ar9287_power_per_rate_table(struct ath_hw *ah,
#undef CMP_CTL
#undef CMP_NO_CTL
#undef REDUCE_SCALED_POWER_BY_TWO_CHAIN
#undef REDUCE_SCALED_POWER_BY_THREE_CHAIN
}
static void ath9k_hw_ar9287_set_txpower(struct ath_hw *ah,

23
drivers/net/wireless/ath/ath9k/eeprom_def.c
View File

@ -991,9 +991,6 @@ static void ath9k_hw_set_def_power_per_rate_table(struct ath_hw *ah,
u16 antenna_reduction,
u16 powerLimit)
{
#define REDUCE_SCALED_POWER_BY_TWO_CHAIN 6 /* 10*log10(2)*2 */
#define REDUCE_SCALED_POWER_BY_THREE_CHAIN 10 /* 10*log10(3)*2 */
struct ar5416_eeprom_def *pEepData = &ah->eeprom.def;
u16 twiceMaxEdgePower;
int i;
@ -1027,24 +1024,8 @@ static void ath9k_hw_set_def_power_per_rate_table(struct ath_hw *ah,
ath9k_hw_get_channel_centers(ah, chan, &centers);
scaledPower = powerLimit - antenna_reduction;
switch (ar5416_get_ntxchains(tx_chainmask)) {
case 1:
break;
case 2:
if (scaledPower > REDUCE_SCALED_POWER_BY_TWO_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_TWO_CHAIN;
else
scaledPower = 0;
break;
case 3:
if (scaledPower > REDUCE_SCALED_POWER_BY_THREE_CHAIN)
scaledPower -= REDUCE_SCALED_POWER_BY_THREE_CHAIN;
else
scaledPower = 0;
break;
}
scaledPower = ath9k_hw_get_scaled_power(ah, powerLimit,
antenna_reduction);
if (IS_CHAN_2GHZ(chan)) {
numCtlModes = ARRAY_SIZE(ctlModesFor11g) -