From e90c54b2358559bd305ff08096e077d2a7f02bf3 Mon Sep 17 00:00:00 2001 From: RA-Jay Hung Date: Sun, 20 Feb 2011 13:55:25 +0100 Subject: [PATCH] rt2x00: Fix rt2800 txpower setting to correct value TX_PWR_CFG_* setting need to consider below cases -compesate 20M/40M tx power delta for 2.4/5GHZ band -limit maximum EIRP tx power to power_level of regulatory requirement Signed-off-by: RA-Jay Hung Signed-off-by: Ivo van Doorn Signed-off-by: John W. Linville --- drivers/net/wireless/rt2x00/rt2800.h | 39 ++++-- drivers/net/wireless/rt2x00/rt2800lib.c | 236 +++++++++++++++++++++++--------- drivers/net/wireless/rt2x00/rt2x00.h | 1 + 3 files changed, 199 insertions(+), 77 deletions(-) diff --git a/drivers/net/wireless/rt2x00/rt2800.h b/drivers/net/wireless/rt2x00/rt2800.h index ef8f605..457887c 100644 --- a/drivers/net/wireless/rt2x00/rt2800.h +++ b/drivers/net/wireless/rt2x00/rt2800.h @@ -1703,11 +1703,14 @@ struct mac_iveiv_entry { */ /* - * BBP 1: TX Antenna & Power - * POWER: 0 - normal, 1 - drop tx power by 6dBm, 2 - drop tx power by 12dBm, - * 3 - increase tx power by 6dBm - */ -#define BBP1_TX_POWER FIELD8(0x07) + * BBP 1: TX Antenna & Power Control + * POWER_CTRL: + * 0 - normal, + * 1 - drop tx power by 6dBm, + * 2 - drop tx power by 12dBm, + * 3 - increase tx power by 6dBm + */ +#define BBP1_TX_POWER_CTRL FIELD8(0x07) #define BBP1_TX_ANTENNA FIELD8(0x18) /* @@ -2001,23 +2004,26 @@ struct mac_iveiv_entry { #define EEPROM_RSSI_A2_LNA_A2 FIELD16(0xff00) /* - * EEPROM Maximum TX power values + * EEPROM EIRP Maximum TX power values(unit: dbm) */ -#define EEPROM_MAX_TX_POWER 0x0027 -#define EEPROM_MAX_TX_POWER_24GHZ FIELD16(0x00ff) -#define EEPROM_MAX_TX_POWER_5GHZ FIELD16(0xff00) +#define EEPROM_EIRP_MAX_TX_POWER 0x0027 +#define EEPROM_EIRP_MAX_TX_POWER_2GHZ FIELD16(0x00ff) +#define EEPROM_EIRP_MAX_TX_POWER_5GHZ FIELD16(0xff00) /* * EEPROM TXpower delta: 20MHZ AND 40 MHZ use different power. * This is delta in 40MHZ. - * VALUE: Tx Power dalta value (MAX=4) + * VALUE: Tx Power dalta value, MAX=4(unit: dbm) * TYPE: 1: Plus the delta value, 0: minus the delta value - * TXPOWER: Enable: + * ENABLE: enable tx power compensation for 40BW */ #define EEPROM_TXPOWER_DELTA 0x0028 -#define EEPROM_TXPOWER_DELTA_VALUE FIELD16(0x003f) -#define EEPROM_TXPOWER_DELTA_TYPE FIELD16(0x0040) -#define EEPROM_TXPOWER_DELTA_TXPOWER FIELD16(0x0080) +#define EEPROM_TXPOWER_DELTA_VALUE_2G FIELD16(0x003f) +#define EEPROM_TXPOWER_DELTA_TYPE_2G FIELD16(0x0040) +#define EEPROM_TXPOWER_DELTA_ENABLE_2G FIELD16(0x0080) +#define EEPROM_TXPOWER_DELTA_VALUE_5G FIELD16(0x3f00) +#define EEPROM_TXPOWER_DELTA_TYPE_5G FIELD16(0x4000) +#define EEPROM_TXPOWER_DELTA_ENABLE_5G FIELD16(0x8000) /* * EEPROM TXPOWER 802.11BG @@ -2215,4 +2221,9 @@ struct mac_iveiv_entry { #define TXPOWER_A_TO_DEV(__txpower) \ clamp_t(char, __txpower, MIN_A_TXPOWER, MAX_A_TXPOWER) +/* + * Board's maximun TX power limitation + */ +#define EIRP_MAX_TX_POWER_LIMIT 0x50 + #endif /* RT2800_H */ diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index c62b4a5..ab41f9e 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -1684,30 +1684,116 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev, rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, ®); } +static int rt2800_get_txpower_bw_comp(struct rt2x00_dev *rt2x00dev, + enum ieee80211_band band) +{ + u16 eeprom; + u8 comp_en; + u8 comp_type; + int comp_value; + + rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_DELTA, &eeprom); + + if (eeprom == 0xffff) + return 0; + + if (band == IEEE80211_BAND_2GHZ) { + comp_en = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_ENABLE_2G); + if (comp_en) { + comp_type = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_TYPE_2G); + comp_value = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_VALUE_2G); + if (!comp_type) + comp_value = -comp_value; + } + } else { + comp_en = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_ENABLE_5G); + if (comp_en) { + comp_type = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_TYPE_5G); + comp_value = rt2x00_get_field16(eeprom, + EEPROM_TXPOWER_DELTA_VALUE_5G); + if (!comp_type) + comp_value = -comp_value; + } + } + + return comp_value; +} + +static u8 rt2800_compesate_txpower(struct rt2x00_dev *rt2x00dev, + int is_rate_b, + enum ieee80211_band band, + int power_level, + u8 txpower) +{ + u32 reg; + u16 eeprom; + u8 criterion; + u8 eirp_txpower; + u8 eirp_txpower_criterion; + u8 reg_limit; + int bw_comp = 0; + + if (!((band == IEEE80211_BAND_5GHZ) && is_rate_b)) + return txpower; + + if (test_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags)) + 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. + * We use OFDM 6M as criterion and its eirp txpower + * is stored at EEPROM_EIRP_MAX_TX_POWER. + * .11b data rate need add additional 4dbm + * when calculating eirp txpower. + */ + rt2800_register_read(rt2x00dev, TX_PWR_CFG_0, ®); + criterion = rt2x00_get_field32(reg, TX_PWR_CFG_0_6MBS); + + rt2x00_eeprom_read(rt2x00dev, + EEPROM_EIRP_MAX_TX_POWER, &eeprom); + + if (band == IEEE80211_BAND_2GHZ) + eirp_txpower_criterion = rt2x00_get_field16(eeprom, + EEPROM_EIRP_MAX_TX_POWER_2GHZ); + else + eirp_txpower_criterion = rt2x00_get_field16(eeprom, + EEPROM_EIRP_MAX_TX_POWER_5GHZ); + + eirp_txpower = eirp_txpower_criterion + (txpower - criterion) + + (is_rate_b ? 4 : 0) + bw_comp; + + reg_limit = (eirp_txpower > power_level) ? + (eirp_txpower - power_level) : 0; + } else + reg_limit = 0; + + return txpower + bw_comp - reg_limit; +} + static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, - const int max_txpower) + struct ieee80211_conf *conf) { u8 txpower; - u8 max_value = (u8)max_txpower; u16 eeprom; - int i; + int i, is_rate_b; u32 reg; u8 r1; u32 offset; + enum ieee80211_band band = conf->channel->band; + int power_level = conf->power_level; /* - * set to normal tx power mode: +/- 0dBm + * set to normal bbp tx power control mode: +/- 0dBm */ rt2800_bbp_read(rt2x00dev, 1, &r1); - rt2x00_set_field8(&r1, BBP1_TX_POWER, 0); + rt2x00_set_field8(&r1, BBP1_TX_POWER_CTRL, 0); rt2800_bbp_write(rt2x00dev, 1, r1); - - /* - * The eeprom contains the tx power values for each rate. These - * values map to 100% tx power. Each 16bit word contains four tx - * power values and the order is the same as used in the TX_PWR_CFG - * registers. - */ offset = TX_PWR_CFG_0; for (i = 0; i < EEPROM_TXPOWER_BYRATE_SIZE; i += 2) { @@ -1721,73 +1807,99 @@ static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev, rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_BYRATE + i, &eeprom); - /* TX_PWR_CFG_0: 1MBS, TX_PWR_CFG_1: 24MBS, + is_rate_b = i ? 0 : 1; + /* + * TX_PWR_CFG_0: 1MBS, TX_PWR_CFG_1: 24MBS, * TX_PWR_CFG_2: MCS4, TX_PWR_CFG_3: MCS12, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE0); - rt2x00_set_field32(®, TX_PWR_CFG_RATE0, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE0, txpower); - /* TX_PWR_CFG_0: 2MBS, TX_PWR_CFG_1: 36MBS, + /* + * TX_PWR_CFG_0: 2MBS, TX_PWR_CFG_1: 36MBS, * TX_PWR_CFG_2: MCS5, TX_PWR_CFG_3: MCS13, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE1); - rt2x00_set_field32(®, TX_PWR_CFG_RATE1, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE1, txpower); - /* TX_PWR_CFG_0: 55MBS, TX_PWR_CFG_1: 48MBS, + /* + * TX_PWR_CFG_0: 5.5MBS, TX_PWR_CFG_1: 48MBS, * TX_PWR_CFG_2: MCS6, TX_PWR_CFG_3: MCS14, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE2); - rt2x00_set_field32(®, TX_PWR_CFG_RATE2, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE2, txpower); - /* TX_PWR_CFG_0: 11MBS, TX_PWR_CFG_1: 54MBS, + /* + * TX_PWR_CFG_0: 11MBS, TX_PWR_CFG_1: 54MBS, * TX_PWR_CFG_2: MCS7, TX_PWR_CFG_3: MCS15, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE3); - rt2x00_set_field32(®, TX_PWR_CFG_RATE3, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE3, txpower); /* read the next four txpower values */ rt2x00_eeprom_read(rt2x00dev, EEPROM_TXPOWER_BYRATE + i + 1, &eeprom); - /* TX_PWR_CFG_0: 6MBS, TX_PWR_CFG_1: MCS0, + is_rate_b = 0; + /* + * TX_PWR_CFG_0: 6MBS, TX_PWR_CFG_1: MCS0, * TX_PWR_CFG_2: MCS8, TX_PWR_CFG_3: unknown, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE0); - rt2x00_set_field32(®, TX_PWR_CFG_RATE4, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE4, txpower); - /* TX_PWR_CFG_0: 9MBS, TX_PWR_CFG_1: MCS1, + /* + * TX_PWR_CFG_0: 9MBS, TX_PWR_CFG_1: MCS1, * TX_PWR_CFG_2: MCS9, TX_PWR_CFG_3: unknown, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE1); - rt2x00_set_field32(®, TX_PWR_CFG_RATE5, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE5, txpower); - /* TX_PWR_CFG_0: 12MBS, TX_PWR_CFG_1: MCS2, + /* + * TX_PWR_CFG_0: 12MBS, TX_PWR_CFG_1: MCS2, * TX_PWR_CFG_2: MCS10, TX_PWR_CFG_3: unknown, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE2); - rt2x00_set_field32(®, TX_PWR_CFG_RATE6, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE6, txpower); - /* TX_PWR_CFG_0: 18MBS, TX_PWR_CFG_1: MCS3, + /* + * TX_PWR_CFG_0: 18MBS, TX_PWR_CFG_1: MCS3, * TX_PWR_CFG_2: MCS11, TX_PWR_CFG_3: unknown, - * TX_PWR_CFG_4: unknown */ + * TX_PWR_CFG_4: unknown + */ txpower = rt2x00_get_field16(eeprom, EEPROM_TXPOWER_BYRATE_RATE3); - rt2x00_set_field32(®, TX_PWR_CFG_RATE7, - min(txpower, max_value)); + txpower = rt2800_compesate_txpower(rt2x00dev, is_rate_b, band, + power_level, txpower); + rt2x00_set_field32(®, TX_PWR_CFG_RATE7, txpower); rt2800_register_write(rt2x00dev, offset, reg); @@ -1846,11 +1958,13 @@ void rt2800_config(struct rt2x00_dev *rt2x00dev, /* Always recalculate LNA gain before changing configuration */ rt2800_config_lna_gain(rt2x00dev, libconf); - if (flags & IEEE80211_CONF_CHANGE_CHANNEL) + if (flags & IEEE80211_CONF_CHANGE_CHANNEL) { rt2800_config_channel(rt2x00dev, libconf->conf, &libconf->rf, &libconf->channel); + rt2800_config_txpower(rt2x00dev, libconf->conf); + } if (flags & IEEE80211_CONF_CHANGE_POWER) - rt2800_config_txpower(rt2x00dev, libconf->conf->power_level); + rt2800_config_txpower(rt2x00dev, libconf->conf); if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS) rt2800_config_retry_limit(rt2x00dev, libconf); if (flags & IEEE80211_CONF_CHANGE_PS) @@ -3040,13 +3154,6 @@ int rt2800_validate_eeprom(struct rt2x00_dev *rt2x00dev) default_lna_gain); rt2x00_eeprom_write(rt2x00dev, EEPROM_RSSI_A2, word); - rt2x00_eeprom_read(rt2x00dev, EEPROM_MAX_TX_POWER, &word); - if (rt2x00_get_field16(word, EEPROM_MAX_TX_POWER_24GHZ) == 0xff) - rt2x00_set_field16(&word, EEPROM_MAX_TX_POWER_24GHZ, MAX_G_TXPOWER); - if (rt2x00_get_field16(word, EEPROM_MAX_TX_POWER_5GHZ) == 0xff) - rt2x00_set_field16(&word, EEPROM_MAX_TX_POWER_5GHZ, MAX_A_TXPOWER); - rt2x00_eeprom_write(rt2x00dev, EEPROM_MAX_TX_POWER, word); - return 0; } EXPORT_SYMBOL_GPL(rt2800_validate_eeprom); @@ -3162,6 +3269,15 @@ int rt2800_init_eeprom(struct rt2x00_dev *rt2x00dev) rt2x00_eeprom_read(rt2x00dev, EEPROM_FREQ, &rt2x00dev->led_mcu_reg); #endif /* CONFIG_RT2X00_LIB_LEDS */ + /* + * Check if support EIRP tx power limit feature. + */ + rt2x00_eeprom_read(rt2x00dev, EEPROM_EIRP_MAX_TX_POWER, &eeprom); + + if (rt2x00_get_field16(eeprom, EEPROM_EIRP_MAX_TX_POWER_2GHZ) < + EIRP_MAX_TX_POWER_LIMIT) + __set_bit(CONFIG_SUPPORT_POWER_LIMIT, &rt2x00dev->flags); + return 0; } EXPORT_SYMBOL_GPL(rt2800_init_eeprom); @@ -3314,7 +3430,6 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev) char *default_power1; char *default_power2; unsigned int i; - unsigned short max_power; u16 eeprom; /* @@ -3439,26 +3554,21 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev) spec->channels_info = info; - rt2x00_eeprom_read(rt2x00dev, EEPROM_MAX_TX_POWER, &eeprom); - max_power = rt2x00_get_field16(eeprom, EEPROM_MAX_TX_POWER_24GHZ); default_power1 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_BG1); default_power2 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_BG2); for (i = 0; i < 14; i++) { - info[i].max_power = max_power; - info[i].default_power1 = TXPOWER_G_FROM_DEV(default_power1[i]); - info[i].default_power2 = TXPOWER_G_FROM_DEV(default_power2[i]); + info[i].default_power1 = default_power1[i]; + info[i].default_power2 = default_power2[i]; } if (spec->num_channels > 14) { - max_power = rt2x00_get_field16(eeprom, EEPROM_MAX_TX_POWER_5GHZ); default_power1 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_A1); default_power2 = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_A2); for (i = 14; i < spec->num_channels; i++) { - info[i].max_power = max_power; - info[i].default_power1 = TXPOWER_A_FROM_DEV(default_power1[i]); - info[i].default_power2 = TXPOWER_A_FROM_DEV(default_power2[i]); + info[i].default_power1 = default_power1[i]; + info[i].default_power2 = default_power2[i]; } } diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h index fd28836a..64c6ef5 100644 --- a/drivers/net/wireless/rt2x00/rt2x00.h +++ b/drivers/net/wireless/rt2x00/rt2x00.h @@ -667,6 +667,7 @@ enum rt2x00_flags { */ CONFIG_SUPPORT_HW_BUTTON, CONFIG_SUPPORT_HW_CRYPTO, + CONFIG_SUPPORT_POWER_LIMIT, DRIVER_SUPPORT_CONTROL_FILTERS, DRIVER_SUPPORT_CONTROL_FILTER_PSPOLL, DRIVER_SUPPORT_PRE_TBTT_INTERRUPT, -- 2.7.4