From 2af242e19f06cfaade7ac8608c9df8af1e0fbb34 Mon Sep 17 00:00:00 2001 From: Helmut Schaa Date: Mon, 28 Mar 2011 13:32:01 +0200 Subject: [PATCH] rt2x00: Don't recalculate HT40 compensation for each rate Previously the HT40 tx power compensation value was calculated for each rate. However, the calculation is independent of the tx rate and as such can be precalculated and just passed in for each rate. Signed-off-by: Helmut Schaa Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2800lib.c | 32 ++++++++++++++----------- 1 file changed, 18 insertions(+), 14 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index 2f8af7a806ec..26ac8927a7c5 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -1861,7 +1861,8 @@ static u8 rt2800_compesate_txpower(struct rt2x00_dev *rt2x00dev, int is_rate_b, enum ieee80211_band band, int power_level, - u8 txpower) + u8 txpower, + int delta) { u32 reg; u16 eeprom; @@ -1869,13 +1870,10 @@ static u8 rt2800_compesate_txpower(struct rt2x00_dev *rt2x00dev, u8 eirp_txpower; u8 eirp_txpower_criterion; u8 reg_limit; - int bw_comp; if (!((band == IEEE80211_BAND_5GHZ) && is_rate_b)) return txpower; - bw_comp = rt2800_get_txpower_bw_comp(rt2x00dev, band); - if (test_bit(CONFIG_SUPPORT_POWER_LIMIT, &rt2x00dev->flags)) { /* * Check if eirp txpower exceed txpower_limit. @@ -1898,14 +1896,14 @@ static u8 rt2800_compesate_txpower(struct rt2x00_dev *rt2x00dev, EEPROM_EIRP_MAX_TX_POWER_5GHZ); eirp_txpower = eirp_txpower_criterion + (txpower - criterion) + - (is_rate_b ? 4 : 0) + bw_comp; + (is_rate_b ? 4 : 0) + delta; reg_limit = (eirp_txpower > power_level) ? (eirp_txpower - power_level) : 0; } else reg_limit = 0; - return txpower + bw_comp - reg_limit; + return txpower + delta - reg_limit; } static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, @@ -1919,6 +1917,12 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, u32 offset; enum ieee80211_band band = conf->channel->band; int power_level = conf->power_level; + int delta; + + /* + * Calculate HT40 compensation delta + */ + delta = rt2800_get_txpower_bw_comp(rt2x00dev, band); /* * set to normal bbp tx power control mode: +/- 0dBm @@ -1948,7 +1952,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE0); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE0, txpower); /* @@ -1959,7 +1963,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE1); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE1, txpower); /* @@ -1970,7 +1974,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE2); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE2, txpower); /* @@ -1981,7 +1985,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE3); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE3, txpower); /* read the next four txpower values */ @@ -1997,7 +2001,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE0); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE4, txpower); /* @@ -2008,7 +2012,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE1); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE5, txpower); /* @@ -2019,7 +2023,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE2); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE6, txpower); /* @@ -2030,7 +2034,7 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE3); txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, - power_level, txpower); + power_level, txpower, delta); rt2x00_set_field32(®, TX_PWR_CFG_RATE7, txpower); rt2800_register_write(rt2x00dev, offset, reg); -- 2.20.1