#define EEPROM_TXPOWER_BG_1 FIELD16(0x00ff)
#define EEPROM_TXPOWER_BG_2 FIELD16(0xff00)
+/*
+ * EEPROM temperature compensation boundaries 802.11BG
+ * MINUS4: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -4)
+ * MINUS3: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -3)
+ */
+#define EEPROM_TSSI_BOUND_BG1 0x0037
+#define EEPROM_TSSI_BOUND_BG1_MINUS4 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_BG1_MINUS3 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11BG
+ * MINUS2: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -2)
+ * MINUS1: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -1)
+ */
+#define EEPROM_TSSI_BOUND_BG2 0x0038
+#define EEPROM_TSSI_BOUND_BG2_MINUS2 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_BG2_MINUS1 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11BG
+ * REF: Reference TSSI value, no tx power changes needed
+ * PLUS1: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 1)
+ */
+#define EEPROM_TSSI_BOUND_BG3 0x0039
+#define EEPROM_TSSI_BOUND_BG3_REF FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_BG3_PLUS1 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11BG
+ * PLUS2: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 2)
+ * PLUS3: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 3)
+ */
+#define EEPROM_TSSI_BOUND_BG4 0x003a
+#define EEPROM_TSSI_BOUND_BG4_PLUS2 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_BG4_PLUS3 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11BG
+ * PLUS4: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 4)
+ * AGC_STEP: Temperature compensation step.
+ */
+#define EEPROM_TSSI_BOUND_BG5 0x003b
+#define EEPROM_TSSI_BOUND_BG5_PLUS4 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_BG5_AGC_STEP FIELD16(0xff00)
+
/*
* EEPROM TXPOWER 802.11A
*/
#define EEPROM_TXPOWER_A_1 FIELD16(0x00ff)
#define EEPROM_TXPOWER_A_2 FIELD16(0xff00)
+/*
+ * EEPROM temperature compensation boundaries 802.11A
+ * MINUS4: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -4)
+ * MINUS3: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -3)
+ */
+#define EEPROM_TSSI_BOUND_A1 0x006a
+#define EEPROM_TSSI_BOUND_A1_MINUS4 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_A1_MINUS3 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11A
+ * MINUS2: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -2)
+ * MINUS1: If the actual TSSI is below this boundary, tx power needs to be
+ * reduced by (agc_step * -1)
+ */
+#define EEPROM_TSSI_BOUND_A2 0x006b
+#define EEPROM_TSSI_BOUND_A2_MINUS2 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_A2_MINUS1 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11A
+ * REF: Reference TSSI value, no tx power changes needed
+ * PLUS1: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 1)
+ */
+#define EEPROM_TSSI_BOUND_A3 0x006c
+#define EEPROM_TSSI_BOUND_A3_REF FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_A3_PLUS1 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11A
+ * PLUS2: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 2)
+ * PLUS3: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 3)
+ */
+#define EEPROM_TSSI_BOUND_A4 0x006d
+#define EEPROM_TSSI_BOUND_A4_PLUS2 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_A4_PLUS3 FIELD16(0xff00)
+
+/*
+ * EEPROM temperature compensation boundaries 802.11A
+ * PLUS4: If the actual TSSI is above this boundary, tx power needs to be
+ * increased by (agc_step * 4)
+ * AGC_STEP: Temperature compensation step.
+ */
+#define EEPROM_TSSI_BOUND_A5 0x006e
+#define EEPROM_TSSI_BOUND_A5_PLUS4 FIELD16(0x00ff)
+#define EEPROM_TSSI_BOUND_A5_AGC_STEP FIELD16(0xff00)
+
/*
* EEPROM TXPOWER by rate: tx power per tx rate for HT20 mode
*/
rt2800_register_read(rt2x00dev, CH_BUSY_STA_SEC, ®);
}
+static int rt2800_get_gain_calibration_delta(struct rt2x00_dev *rt2x00dev)
+{
+ u8 tssi_bounds[9];
+ u8 current_tssi;
+ u16 eeprom;
+ u8 step;
+ int i;
+
+ /*
+ * Read TSSI boundaries for temperature compensation from
+ * the EEPROM.
+ *
+ * Array idx 0 1 2 3 4 5 6 7 8
+ * Matching Delta value -4 -3 -2 -1 0 +1 +2 +3 +4
+ * Example TSSI bounds 0xF0 0xD0 0xB5 0xA0 0x88 0x45 0x25 0x15 0x00
+ */
+ if (rt2x00dev->curr_band == IEEE80211_BAND_2GHZ) {
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG1, &eeprom);
+ tssi_bounds[0] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG1_MINUS4);
+ tssi_bounds[1] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG1_MINUS3);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG2, &eeprom);
+ tssi_bounds[2] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG2_MINUS2);
+ tssi_bounds[3] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG2_MINUS1);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG3, &eeprom);
+ tssi_bounds[4] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG3_REF);
+ tssi_bounds[5] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG3_PLUS1);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG4, &eeprom);
+ tssi_bounds[6] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG4_PLUS2);
+ tssi_bounds[7] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG4_PLUS3);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_BG5, &eeprom);
+ tssi_bounds[8] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG5_PLUS4);
+
+ step = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_BG5_AGC_STEP);
+ } else {
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A1, &eeprom);
+ tssi_bounds[0] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A1_MINUS4);
+ tssi_bounds[1] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A1_MINUS3);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A2, &eeprom);
+ tssi_bounds[2] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A2_MINUS2);
+ tssi_bounds[3] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A2_MINUS1);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A3, &eeprom);
+ tssi_bounds[4] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A3_REF);
+ tssi_bounds[5] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A3_PLUS1);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A4, &eeprom);
+ tssi_bounds[6] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A4_PLUS2);
+ tssi_bounds[7] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A4_PLUS3);
+
+ rt2x00_eeprom_read(rt2x00dev, EEPROM_TSSI_BOUND_A5, &eeprom);
+ tssi_bounds[8] = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A5_PLUS4);
+
+ step = rt2x00_get_field16(eeprom,
+ EEPROM_TSSI_BOUND_A5_AGC_STEP);
+ }
+
+ /*
+ * Check if temperature compensation is supported.
+ */
+ if (tssi_bounds[4] == 0xff)
+ return 0;
+
+ /*
+ * Read current TSSI (BBP 49).
+ */
+ rt2800_bbp_read(rt2x00dev, 49, ¤t_tssi);
+
+ /*
+ * Compare TSSI value (BBP49) with the compensation boundaries
+ * from the EEPROM and increase or decrease tx power.
+ */
+ for (i = 0; i <= 3; i++) {
+ if (current_tssi > tssi_bounds[i])
+ break;
+ }
+
+ if (i == 4) {
+ for (i = 8; i >= 5; i--) {
+ if (current_tssi < tssi_bounds[i])
+ break;
+ }
+ }
+
+ return (i - 4) * step;
+}
+
static int rt2800_get_txpower_bw_comp(struct rt2x00_dev *rt2x00dev,
enum ieee80211_band band)
{
}
static void rt2800_config_txpower(struct rt2x00_dev *rt2x00dev,
- struct ieee80211_conf *conf)
+ enum ieee80211_band band,
+ int power_level)
{
u8 txpower;
u16 eeprom;
u32 reg;
u8 r1;
u32 offset;
- enum ieee80211_band band = conf->channel->band;
- int power_level = conf->power_level;
int delta;
/*
*/
delta = rt2800_get_txpower_bw_comp(rt2x00dev, band);
+ /*
+ * calculate temperature compensation delta
+ */
+ delta += rt2800_get_gain_calibration_delta(rt2x00dev);
+
/*
* set to normal bbp tx power control mode: +/- 0dBm
*/
}
}
+void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev)
+{
+ rt2800_config_txpower(rt2x00dev, rt2x00dev->curr_band,
+ rt2x00dev->tx_power);
+}
+EXPORT_SYMBOL_GPL(rt2800_gain_calibration);
+
static void rt2800_config_retry_limit(struct rt2x00_dev *rt2x00dev,
struct rt2x00lib_conf *libconf)
{
if (flags & IEEE80211_CONF_CHANGE_CHANNEL) {
rt2800_config_channel(rt2x00dev, libconf->conf,
&libconf->rf, &libconf->channel);
- rt2800_config_txpower(rt2x00dev, libconf->conf);
+ rt2800_config_txpower(rt2x00dev, libconf->conf->channel->band,
+ libconf->conf->power_level);
}
if (flags & IEEE80211_CONF_CHANGE_POWER)
- rt2800_config_txpower(rt2x00dev, libconf->conf);
+ rt2800_config_txpower(rt2x00dev, libconf->conf->channel->band,
+ libconf->conf->power_level);
if (flags & IEEE80211_CONF_CHANGE_RETRY_LIMITS)
rt2800_config_retry_limit(rt2x00dev, libconf);
if (flags & IEEE80211_CONF_CHANGE_PS)
void rt2800_reset_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual);
void rt2800_link_tuner(struct rt2x00_dev *rt2x00dev, struct link_qual *qual,
const u32 count);
+void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev);
int rt2800_enable_radio(struct rt2x00_dev *rt2x00dev);
void rt2800_disable_radio(struct rt2x00_dev *rt2x00dev);
.link_stats = rt2800_link_stats,
.reset_tuner = rt2800_reset_tuner,
.link_tuner = rt2800_link_tuner,
+ .gain_calibration = rt2800_gain_calibration,
.start_queue = rt2800pci_start_queue,
.kick_queue = rt2800pci_kick_queue,
.stop_queue = rt2800pci_stop_queue,
.link_stats = rt2800_link_stats,
.reset_tuner = rt2800_reset_tuner,
.link_tuner = rt2800_link_tuner,
+ .gain_calibration = rt2800_gain_calibration,
.watchdog = rt2800usb_watchdog,
.start_queue = rt2800usb_start_queue,
.kick_queue = rt2x00usb_kick_queue,
* to bring the device/driver back into the desired state.
*/
struct delayed_work watchdog_work;
+
+ /*
+ * Work structure for scheduling periodic AGC adjustments.
+ */
+ struct delayed_work agc_work;
};
enum rt2x00_delayed_flags {
struct link_qual *qual);
void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
struct link_qual *qual, const u32 count);
+ void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
/*
* Data queue handlers.
*/
rt2x00queue_start_queues(rt2x00dev);
rt2x00link_start_tuner(rt2x00dev);
+ rt2x00link_start_agc(rt2x00dev);
/*
* Start watchdog monitoring.
/*
* Stop all queues
*/
+ rt2x00link_stop_agc(rt2x00dev);
rt2x00link_stop_tuner(rt2x00dev);
rt2x00queue_stop_queues(rt2x00dev);
rt2x00queue_flush_queues(rt2x00dev, true);
*/
#define WATCHDOG_INTERVAL round_jiffies_relative(HZ)
#define LINK_TUNE_INTERVAL round_jiffies_relative(HZ)
+#define AGC_INTERVAL round_jiffies_relative(4 * HZ)
/*
* rt2x00_rate: Per rate device information
*/
void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev);
+/**
+ * rt2x00link_start_agc - Start periodic gain calibration
+ * @rt2x00dev: Pointer to &struct rt2x00_dev.
+ */
+void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev);
+
+/**
+ * rt2x00link_stop_agc - Stop periodic gain calibration
+ * @rt2x00dev: Pointer to &struct rt2x00_dev.
+ */
+void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev);
+
/**
* rt2x00link_register - Initialize link tuning & watchdog functionality
* @rt2x00dev: Pointer to &struct rt2x00_dev.
WATCHDOG_INTERVAL);
}
+void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev)
+{
+ struct link *link = &rt2x00dev->link;
+
+ if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
+ rt2x00dev->ops->lib->gain_calibration)
+ ieee80211_queue_delayed_work(rt2x00dev->hw,
+ &link->agc_work,
+ AGC_INTERVAL);
+}
+
+void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev)
+{
+ cancel_delayed_work_sync(&rt2x00dev->link.agc_work);
+}
+
+static void rt2x00link_agc(struct work_struct *work)
+{
+ struct rt2x00_dev *rt2x00dev =
+ container_of(work, struct rt2x00_dev, link.agc_work.work);
+ struct link *link = &rt2x00dev->link;
+
+ /*
+ * When the radio is shutting down we should
+ * immediately cease the watchdog monitoring.
+ */
+ if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
+ return;
+
+ rt2x00dev->ops->lib->gain_calibration(rt2x00dev);
+
+ if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
+ ieee80211_queue_delayed_work(rt2x00dev->hw,
+ &link->agc_work,
+ AGC_INTERVAL);
+}
+
void rt2x00link_register(struct rt2x00_dev *rt2x00dev)
{
+ INIT_DELAYED_WORK(&rt2x00dev->link.agc_work, rt2x00link_agc);
INIT_DELAYED_WORK(&rt2x00dev->link.watchdog_work, rt2x00link_watchdog);
INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00link_tuner);
}
projects / ~andy / linux / commitdiff