wifi: rtw89: 8922d: add set channel of MAC part

The set channel is a key function to switch to specific operating channel.
For MAC part, configure hardware according to channel bandwidth, and
enable CCK rate for 2GHz band only.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20260324062049.52266-6-pkshih@realtek.com

2 files changed, 93 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/reg.h b/drivers/net/wireless/realtek/rtw89/reg.h
index 179006c8e499..2195f576facc 100644
--- a/drivers/net/wireless/realtek/rtw89/reg.h
+++ b/drivers/net/wireless/realtek/rtw89/reg.h
@@ -6801,6 +6801,7 @@
 #define R_BE_MUEDCA_EN 0x10370
 #define R_BE_MUEDCA_EN_C1 0x14370
 #define B_BE_SIFS_TIMEOUT_TB_T2_MASK GENMASK(30, 24)
+#define B_BE_SIFS_MACTXEN_TB_T1_DOT05US_MASK GENMASK(23, 16)
 #define B_BE_SIFS_MACTXEN_TB_T1_MASK GENMASK(22, 16)
 #define B_BE_MUEDCA_WMM_SEL BIT(8)
 #define B_BE_SET_MUEDCATIMER_TF_MASK GENMASK(5, 4)
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8922d.c b/drivers/net/wireless/realtek/rtw89/rtw8922d.c
index cbe8e067ae55..a341734ef54d 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8922d.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8922d.c
@@ -5,6 +5,7 @@
 #include "debug.h"
 #include "efuse.h"
 #include "mac.h"
+#include "phy.h"
 #include "reg.h"
 #include "rtw8922d.h"
 
@@ -835,6 +836,97 @@ static void rtw8922d_power_trim(struct rtw89_dev *rtwdev)
 	rtw8922d_pad_bias_trim(rtwdev);
 }
 
+static void rtw8922d_set_channel_mac(struct rtw89_dev *rtwdev,
+				     const struct rtw89_chan *chan,
+				     u8 mac_idx)
+{
+	u32 sub_carr = rtw89_mac_reg_by_idx(rtwdev, R_BE_TX_SUB_BAND_VALUE, mac_idx);
+	u32 chk_rate = rtw89_mac_reg_by_idx(rtwdev, R_BE_TXRATE_CHK, mac_idx);
+	u32 rf_mod = rtw89_mac_reg_by_idx(rtwdev, R_BE_WMAC_RFMOD, mac_idx);
+	u8 txsb20 = 0, txsb40 = 0, txsb80 = 0;
+	u8 rf_mod_val, chk_rate_mask, sifs;
+	u32 txsb;
+	u32 reg;
+
+	switch (chan->band_width) {
+	case RTW89_CHANNEL_WIDTH_160:
+		txsb80 = rtw89_phy_get_txsb(rtwdev, chan, RTW89_CHANNEL_WIDTH_80);
+		fallthrough;
+	case RTW89_CHANNEL_WIDTH_80:
+		txsb40 = rtw89_phy_get_txsb(rtwdev, chan, RTW89_CHANNEL_WIDTH_40);
+		fallthrough;
+	case RTW89_CHANNEL_WIDTH_40:
+		txsb20 = rtw89_phy_get_txsb(rtwdev, chan, RTW89_CHANNEL_WIDTH_20);
+		break;
+	default:
+		break;
+	}
+
+	switch (chan->band_width) {
+	case RTW89_CHANNEL_WIDTH_160:
+		rf_mod_val = BE_WMAC_RFMOD_160M;
+		txsb = u32_encode_bits(txsb20, B_BE_TXSB_20M_MASK) |
+		       u32_encode_bits(txsb40, B_BE_TXSB_40M_MASK) |
+		       u32_encode_bits(txsb80, B_BE_TXSB_80M_MASK);
+		break;
+	case RTW89_CHANNEL_WIDTH_80:
+		rf_mod_val = BE_WMAC_RFMOD_80M;
+		txsb = u32_encode_bits(txsb20, B_BE_TXSB_20M_MASK) |
+		       u32_encode_bits(txsb40, B_BE_TXSB_40M_MASK);
+		break;
+	case RTW89_CHANNEL_WIDTH_40:
+		rf_mod_val = BE_WMAC_RFMOD_40M;
+		txsb = u32_encode_bits(txsb20, B_BE_TXSB_20M_MASK);
+		break;
+	case RTW89_CHANNEL_WIDTH_20:
+	default:
+		rf_mod_val = BE_WMAC_RFMOD_20M;
+		txsb = 0;
+		break;
+	}
+
+	if (txsb20 <= BE_PRI20_BITMAP_MAX)
+		txsb |= u32_encode_bits(BIT(txsb20), B_BE_PRI20_BITMAP_MASK);
+
+	rtw89_write8_mask(rtwdev, rf_mod, B_BE_WMAC_RFMOD_MASK, rf_mod_val);
+	rtw89_write32(rtwdev, sub_carr, txsb);
+
+	switch (chan->band_type) {
+	case RTW89_BAND_2G:
+		chk_rate_mask = B_BE_BAND_MODE;
+		break;
+	case RTW89_BAND_5G:
+	case RTW89_BAND_6G:
+		chk_rate_mask = B_BE_CHECK_CCK_EN | B_BE_RTS_LIMIT_IN_OFDM6;
+		break;
+	default:
+		rtw89_warn(rtwdev, "Invalid band_type:%d\n", chan->band_type);
+		return;
+	}
+
+	rtw89_write8_clr(rtwdev, chk_rate, B_BE_BAND_MODE | B_BE_CHECK_CCK_EN |
+					   B_BE_RTS_LIMIT_IN_OFDM6);
+	rtw89_write8_set(rtwdev, chk_rate, chk_rate_mask);
+
+	switch (chan->band_width) {
+	case RTW89_CHANNEL_WIDTH_160:
+		sifs = 0x8C;
+		break;
+	case RTW89_CHANNEL_WIDTH_80:
+		sifs = 0x8A;
+		break;
+	case RTW89_CHANNEL_WIDTH_40:
+		sifs = 0x84;
+		break;
+	case RTW89_CHANNEL_WIDTH_20:
+	default:
+		sifs = 0x82;
+	}
+
+	reg = rtw89_mac_reg_by_idx(rtwdev, R_BE_MUEDCA_EN, mac_idx);
+	rtw89_write32_mask(rtwdev, reg, B_BE_SIFS_MACTXEN_TB_T1_DOT05US_MASK, sifs);
+}
+
 MODULE_FIRMWARE(RTW8922D_MODULE_FIRMWARE);
 MODULE_FIRMWARE(RTW8922DS_MODULE_FIRMWARE);
 MODULE_AUTHOR("Realtek Corporation");