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rt2x00: rt2800lib: fix default VGC values for RT3572 for the 5GHz band 

The rt2x00 driver uses 0x22 as a default VGC value
in VGC adjustment for the RT3572 chipset. In the
Ralink DPO_RT5572_LinuxSTA_2.6.1.3_20121022 driver,
this value is only used for initialization. During
VGC adjustment, the reference driver uses different
values.

Update the 'rt2800_get_default_vgc' function to
synchronize the values with the reference driver.
Also add the missing AGC initialization code into
the 'rt2800_config_channel' function.

References:
  RT35xx_SetAGCInitValue in chip/rt35xx.c
  RT35xx_ChipAGCAdjust in chip/rt35xx.c

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Acked-by: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Gabor Juhos 2013-10-04 22:07:09 +02:00 committed by John W. Linville
parent 271f1a4d70
commit 733aec6a5b
1 changed files with 11 additions and 4 deletions
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15
drivers/net/wireless/rt2x00/rt2800lib.c
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@ -3310,9 +3310,18 @@ static void rt2800_config_channel(struct rt2x00_dev *rt2x00dev,
rt2800_register_write(rt2x00dev, TX_PIN_CFG, tx_pin);
if (rt2x00_rt(rt2x00dev, RT3572))
if (rt2x00_rt(rt2x00dev, RT3572)) {
rt2800_rfcsr_write(rt2x00dev, 8, 0x80);
/* AGC init */
if (rf->channel <= 14)
reg = 0x1c + (2 * rt2x00dev->lna_gain);
else
reg = 0x22 + ((rt2x00dev->lna_gain * 5) / 3);
rt2800_bbp_write_with_rx_chain(rt2x00dev, 66, reg);
}
if (rt2x00_rt(rt2x00dev, RT3593)) {
rt2800_register_read(rt2x00dev, GPIO_CTRL, &reg);
@ -4421,9 +4430,7 @@ static u8 rt2800_get_default_vgc(struct rt2x00_dev *rt2x00dev)
else
vgc = 0x2e + rt2x00dev->lna_gain;
} else { /* 5GHZ band */
if (rt2x00_rt(rt2x00dev, RT3572))
vgc = 0x22 + (rt2x00dev->lna_gain * 5) / 3;
else if (rt2x00_rt(rt2x00dev, RT3593))
if (rt2x00_rt(rt2x00dev, RT3593))
vgc = 0x20 + (rt2x00dev->lna_gain * 5) / 3;
else if (rt2x00_rt(rt2x00dev, RT5592))
vgc = 0x24 + (2 * rt2x00dev->lna_gain);