From: Tzu-En Huang <[email protected]>
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 <[email protected]>
Signed-off-by: Tzu-En Huang <[email protected]>
Signed-off-by: Yan-Hsuan Chuang <[email protected]>
---
drivers/net/wireless/realtek/rtw88/rtw8821c.c | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)
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 = {
--
2.17.1