diff options
| author | John Li <chen-yang.li@mediatek.com> | 2012-02-16 14:40:57 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-02-27 20:05:44 +0100 |
| commit | 2e9c43dd45ced5bd77c94d4216f96b4a49448d73 (patch) | |
| tree | 6c6a219ab04d652197fef2f8ae5538571ed1782a /drivers/net/wireless/rt2x00/rt2800lib.c | |
| parent | ath9k: Fix descriptor length for AR9462 (diff) | |
| download | linux-2e9c43dd45ced5bd77c94d4216f96b4a49448d73.tar.xz linux-2e9c43dd45ced5bd77c94d4216f96b4a49448d73.zip | |
rt2x00:Add VCO recalibration
Signed-off-by: John Li <chen-yang.li@mediatek.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rt2x00/rt2800lib.c')
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt2800lib.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c index f1df929e97a7..6104a14e4fff 100644 --- a/drivers/net/wireless/rt2x00/rt2800lib.c +++ b/drivers/net/wireless/rt2x00/rt2800lib.c @@ -2497,6 +2497,80 @@ void rt2800_gain_calibration(struct rt2x00_dev *rt2x00dev) } EXPORT_SYMBOL_GPL(rt2800_gain_calibration); +void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev) +{ + u32 tx_pin; + u8 rfcsr; + + /* + * A voltage-controlled oscillator(VCO) is an electronic oscillator + * designed to be controlled in oscillation frequency by a voltage + * input. Maybe the temperature will affect the frequency of + * oscillation to be shifted. The VCO calibration will be called + * periodically to adjust the frequency to be precision. + */ + + rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin); + tx_pin &= TX_PIN_CFG_PA_PE_DISABLE; + rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin); + + switch (rt2x00dev->chip.rf) { + case RF2020: + case RF3020: + case RF3021: + case RF3022: + case RF3320: + case RF3052: + rt2800_rfcsr_read(rt2x00dev, 7, &rfcsr); + rt2x00_set_field8(&rfcsr, RFCSR7_RF_TUNING, 1); + rt2800_rfcsr_write(rt2x00dev, 7, rfcsr); + break; + case RF5370: + case RF5372: + case RF5390: + rt2800_rfcsr_read(rt2x00dev, 3, &rfcsr); + rt2x00_set_field8(&rfcsr, RFCSR30_RF_CALIBRATION, 1); + rt2800_rfcsr_write(rt2x00dev, 3, rfcsr); + break; + default: + return; + } + + mdelay(1); + + rt2800_register_read(rt2x00dev, TX_PIN_CFG, &tx_pin); + if (rt2x00dev->rf_channel <= 14) { + switch (rt2x00dev->default_ant.tx_chain_num) { + case 3: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G2_EN, 1); + /* fall through */ + case 2: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G1_EN, 1); + /* fall through */ + case 1: + default: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_G0_EN, 1); + break; + } + } else { + switch (rt2x00dev->default_ant.tx_chain_num) { + case 3: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A2_EN, 1); + /* fall through */ + case 2: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A1_EN, 1); + /* fall through */ + case 1: + default: + rt2x00_set_field32(&tx_pin, TX_PIN_CFG_PA_PE_A0_EN, 1); + break; + } + } + rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin); + +} +EXPORT_SYMBOL_GPL(rt2800_vco_calibration); + static void rt2800_config_retry_limit(struct rt2x00_dev *rt2x00dev, struct rt2x00lib_conf *libconf) { @@ -4451,6 +4525,20 @@ int rt2800_probe_hw_mode(struct rt2x00_dev *rt2x00dev) } } + switch (rt2x00dev->chip.rf) { + case RF2020: + case RF3020: + case RF3021: + case RF3022: + case RF3320: + case RF3052: + case RF5370: + case RF5372: + case RF5390: + __set_bit(CAPABILITY_VCO_RECALIBRATION, &rt2x00dev->cap_flags); + break; + } + return 0; } EXPORT_SYMBOL_GPL(rt2800_probe_hw_mode); |