From 1ac3294bf75e8a15122277ba3fd3ef58e4647a4a Mon Sep 17 00:00:00 2001 From: Yan-Hsuan Chuang Date: Mon, 9 Sep 2019 15:16:07 +0800 Subject: rtw88: 8822c: add FW IQK support Add support for doing IQK in firmware Ideally the RF component's I/Q vectors should be orthogonal, but usually they are not. So we need to calibrate for the RF components, ex. PA/LNA, ADC/DAC. And if the I/Q vectors are more orthogonal, the mixed signal will have less deviation. This helps with those rates with higher modulation (MCS8-9), because they have more strict EVM/SNR requirement. Also the better of the quality of the signal, the longer it can propagate, and the better throughput performance we can get. Signed-off-by: Yan-Hsuan Chuang Signed-off-by: Kalle Valo --- drivers/net/wireless/realtek/rtw88/rtw8822c.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/net/wireless/realtek/rtw88/rtw8822c.c') diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c index e11bbc37120a..176ca5fafe95 100644 --- a/drivers/net/wireless/realtek/rtw88/rtw8822c.c +++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.c @@ -1876,6 +1876,22 @@ static void rtw8822c_false_alarm_statistics(struct rtw_dev *rtwdev) static void rtw8822c_do_iqk(struct rtw_dev *rtwdev) { + struct rtw_iqk_para para = {0}; + u8 iqk_chk; + int counter; + + para.clear = 1; + rtw_fw_do_iqk(rtwdev, ¶); + + for (counter = 0; counter < 300; counter++) { + iqk_chk = rtw_read8(rtwdev, REG_RPT_CIP); + if (iqk_chk == 0xaa) + break; + msleep(20); + } + rtw_write8(rtwdev, REG_IQKSTAT, 0x0); + + rtw_dbg(rtwdev, RTW_DBG_RFK, "iqk counter=%d\n", counter); } /* for coex */ -- cgit v1.2.3-58-ga151