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rtw88: 8821c: add phy calibration 

In order to get a better TX EVM, do calibration after association.

The calibration needed for 8821c is the IQK, which is done in the
firmware. Implement the rtw_chip_ops::phy_calibration() to trigger
firmware to calibrate.

Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Tzu-En Huang <tehuang@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200616091625.26489-8-yhchuang@realtek.com
This commit is contained in:
Tzu-En Huang 2020-06-16 17:16:25 +08:00 committed by Kalle Valo
parent 960361238b
commit 1a94d93e64
1 changed files with 34 additions and 0 deletions
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34
drivers/net/wireless/realtek/rtw88/rtw8821c.c
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@ -563,6 +563,39 @@ static void rtw8821c_false_alarm_statistics(struct rtw_dev *rtwdev)
rtw_write32_clr(rtwdev, REG_CNTRST, BIT(0));
}
static void rtw8821c_do_iqk(struct rtw_dev *rtwdev)
{
static int do_iqk_cnt;
struct rtw_iqk_para para = {.clear = 0, .segment_iqk = 0};
u32 rf_reg, iqk_fail_mask;
int counter;
bool reload;
if (rtw_is_assoc(rtwdev))
para.segment_iqk = 1;
rtw_fw_do_iqk(rtwdev, &para);
for (counter = 0; counter < 300; counter++) {
rf_reg = rtw_read_rf(rtwdev, RF_PATH_A, RF_DTXLOK, RFREG_MASK);
if (rf_reg == 0xabcde)
break;
msleep(20);
}
rtw_write_rf(rtwdev, RF_PATH_A, RF_DTXLOK, RFREG_MASK, 0x0);
reload = !!rtw_read32_mask(rtwdev, REG_IQKFAILMSK, BIT(16));
iqk_fail_mask = rtw_read32_mask(rtwdev, REG_IQKFAILMSK, GENMASK(7, 0));
rtw_dbg(rtwdev, RTW_DBG_PHY,
"iqk counter=%d reload=%d do_iqk_cnt=%d n_iqk_fail(mask)=0x%02x\n",
counter, reload, ++do_iqk_cnt, iqk_fail_mask);
}
static void rtw8821c_phy_calibration(struct rtw_dev *rtwdev)
{
rtw8821c_do_iqk(rtwdev);
}
static struct rtw_pwr_seq_cmd trans_carddis_to_cardemu_8821c[] = {
{0x0086,
RTW_PWR_CUT_ALL_MSK,
@ -1001,6 +1034,7 @@ static struct rtw_chip_ops rtw8821c_ops = {
.set_tx_power_index = rtw8821c_set_tx_power_index,
.cfg_ldo25 = rtw8821c_cfg_ldo25,
.false_alarm_statistics = rtw8821c_false_alarm_statistics,
.phy_calibration = rtw8821c_phy_calibration,
};
struct rtw_chip_info rtw8821c_hw_spec = {