diff options
| author | Tzu-En Huang <tehuang@realtek.com> | 2020-06-16 11:16:25 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2020-07-15 11:06:59 +0200 |
| commit | 1a94d93e648f6829a1dc30cb1ee4e1f92c7386e0 (patch) | |
| tree | aff4513bb17b85fed789f55fceea222bbff2042a /drivers/net/wireless/realtek/rtw88/rtw8821c.c | |
| parent | rtw88: 8821c: add false alarm statistics (diff) | |
| download | linux-1a94d93e648f6829a1dc30cb1ee4e1f92c7386e0.tar.xz linux-1a94d93e648f6829a1dc30cb1ee4e1f92c7386e0.zip | |
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
Diffstat (limited to 'drivers/net/wireless/realtek/rtw88/rtw8821c.c')
| -rw-r--r-- | drivers/net/wireless/realtek/rtw88/rtw8821c.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8821c.c b/drivers/net/wireless/realtek/rtw88/rtw8821c.c index ffcb427468d7..4bd4164d23ef 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8821c.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8821c.c @@ -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, ¶); + + 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 = { |