Commit 1a94d93e authored by Tzu-En Huang's avatar Tzu-En Huang Committed by Kalle Valo
Browse files

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: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarTzu-En Huang <tehuang@realtek.com>
Signed-off-by: default avatarYan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: default avatarKalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200616091625.26489-8-yhchuang@realtek.com
parent 96036123

drivers/net/wireless/realtek/rtw88/rtw8821c.c

+34 −0
Original line number Diff line number Diff line
@@ -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 = {