rtw89: 8852c: add write/read crystal function in CFO tracking

The CFO tracking algorithm is the same, but control methods are different.
Set parameters via xtal serial interfaces (SI).
Signed-off-by: Yuan-Han Zhang <yuanhan1020@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220317055543.40514-3-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/mac.h

@@ -884,7 +884,9 @@ int rtw89_mac_get_tx_retry_limit(struct rtw89_dev *rtwdev,
 
 enum rtw89_mac_xtal_si_offset {
 	XTAL_SI_XTAL_SC_XI = 0x04,
+#define XTAL_SC_XI_MASK		GENMASK(7, 0)
 	XTAL_SI_XTAL_SC_XO = 0x05,
+#define XTAL_SC_XO_MASK		GENMASK(7, 0)
 	XTAL_SI_PWR_CUT = 0x10,
 #define XTAL_SI_SMALL_PWR_CUT	BIT(0)
 #define XTAL_SI_BIG_PWR_CUT	BIT(1)

drivers/net/wireless/realtek/rtw89/phy.c

@@ -4,6 +4,7 @@
 
 #include "debug.h"
 #include "fw.h"
+#include "mac.h"
 #include "phy.h"
 #include "ps.h"
 #include "reg.h"
@@ -1667,15 +1668,25 @@ static void rtw89_phy_cfo_set_crystal_cap(struct rtw89_dev *rtwdev,
 					  u8 crystal_cap, bool force)
 {
 	struct rtw89_cfo_tracking_info *cfo = &rtwdev->cfo_tracking;
+	const struct rtw89_chip_info *chip = rtwdev->chip;
 	u8 sc_xi_val, sc_xo_val;
 
 	if (!force && cfo->crystal_cap == crystal_cap)
 		return;
 	crystal_cap = clamp_t(u8, crystal_cap, 0, 127);
-	rtw89_phy_cfo_set_xcap_reg(rtwdev, true, crystal_cap);
-	rtw89_phy_cfo_set_xcap_reg(rtwdev, false, crystal_cap);
-	sc_xo_val = rtw89_phy_cfo_get_xcap_reg(rtwdev, true);
-	sc_xi_val = rtw89_phy_cfo_get_xcap_reg(rtwdev, false);
+	if (chip->chip_id == RTL8852A) {
+		rtw89_phy_cfo_set_xcap_reg(rtwdev, true, crystal_cap);
+		rtw89_phy_cfo_set_xcap_reg(rtwdev, false, crystal_cap);
+		sc_xo_val = rtw89_phy_cfo_get_xcap_reg(rtwdev, true);
+		sc_xi_val = rtw89_phy_cfo_get_xcap_reg(rtwdev, false);
+	} else {
+		rtw89_mac_write_xtal_si(rtwdev, XTAL_SI_XTAL_SC_XO,
+					crystal_cap, XTAL_SC_XO_MASK);
+		rtw89_mac_write_xtal_si(rtwdev, XTAL_SI_XTAL_SC_XI,
+					crystal_cap, XTAL_SC_XI_MASK);
+		rtw89_mac_read_xtal_si(rtwdev, XTAL_SI_XTAL_SC_XO, &sc_xo_val);
+		rtw89_mac_read_xtal_si(rtwdev, XTAL_SI_XTAL_SC_XI, &sc_xi_val);
+	}
 	cfo->crystal_cap = sc_xi_val;
 	cfo->x_cap_ofst = (s8)((int)cfo->crystal_cap - cfo->def_x_cap);