From: RA-Jay Hung <Jay_Hung@xxxxxxxxxxxxxx>
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 <jay_hung@xxxxxxxxxxxxxx>
Signed-off-by: Ivo van Doorn <IvDoorn@xxxxxxxxx>
---
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 7f44b97..d23a5d8 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -1676,30 +1676,116 @@ 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) {
@@ -1713,73 +1799,99 @@ 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);
@@ -1838,11 +1950,13 @@ 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)
@@ -3032,13 +3146,6 @@ 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);
@@ -3154,6 +3261,15 @@ 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);
@@ -3306,7 +3422,6 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
char *default_power1;
char *default_power2;
unsigned int i;
- unsigned short max_power;
u16 eeprom;
/*
@@ -3431,26 +3546,21 @@ 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 fd28836..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,
--
1.7.2.3
--
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