From: Yan-Hsuan Chuang <[email protected]>
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 <[email protected]>
---
v1 -> v2
* add more log to describe IQK
drivers/net/wireless/realtek/rtw88/rtw8822c.c | 16 ++++++++++++++++
drivers/net/wireless/realtek/rtw88/rtw8822c.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.c b/drivers/net/wireless/realtek/rtw88/rtw8822c.c
index e11bbc3..176ca5f 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 */
diff --git a/drivers/net/wireless/realtek/rtw88/rtw8822c.h b/drivers/net/wireless/realtek/rtw88/rtw8822c.h
index 5ee1de4..14a8894 100644
--- a/drivers/net/wireless/realtek/rtw88/rtw8822c.h
+++ b/drivers/net/wireless/realtek/rtw88/rtw8822c.h
@@ -176,6 +176,7 @@ struct rtw8822c_efuse {
#define REG_TXF7 0x1ab0
#define REG_CCK_SOURCE 0x1abc
#define BIT_NBI_EN BIT(30)
+#define REG_IQKSTAT 0x1b10
#define REG_TXANT 0x1c28
#define REG_ENCCK 0x1c3c
#define BIT_CCK_BLK_EN BIT(1)
@@ -197,6 +198,7 @@ struct rtw8822c_efuse {
#define REG_OFDM_FACNT3 0x2d0c
#define REG_OFDM_FACNT4 0x2d10
#define REG_OFDM_FACNT5 0x2d20
+#define REG_RPT_CIP 0x2d9c
#define REG_OFDM_TXCNT 0x2de0
#define REG_ORITXCODE2 0x4100
#define REG_3WIRE2 0x410c
--
2.7.4