wifi: rtw89: 8852b: add chip_ops::set_channel

set_channel is main function to configure channel and bandwidth for all
layers, namely MAC, BB and RF. Additionally, MAC layer enables CCK rate
checking to avoid wrong rate from driver. BB layer configures SCO
(Sample Clock Offset) for CCK, TX gain error/offset, and reset baseband
hardware circuit after all configurations done.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20221005083212.45683-7-pkshih@realtek.com

1 files changed, 256 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c
new file mode 100644
index 000000000000..761544b0dcca
--- /dev/null
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b_rfk.c
@@ -0,0 +1,256 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/* Copyright(c) 2019-2022  Realtek Corporation
+ */
+
+#include "coex.h"
+#include "debug.h"
+#include "mac.h"
+#include "phy.h"
+#include "reg.h"
+#include "rtw8852b.h"
+#include "rtw8852b_rfk.h"
+#include "rtw8852b_rfk_table.h"
+#include "rtw8852b_table.h"
+
+static u8 _kpath(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
+{
+	u8 val;
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK]dbcc_en: %x,PHY%d\n",
+		    rtwdev->dbcc_en, phy_idx);
+
+	if (!rtwdev->dbcc_en) {
+		val = RF_AB;
+	} else {
+		if (phy_idx == RTW89_PHY_0)
+			val = RF_A;
+		else
+			val = RF_B;
+	}
+	return val;
+}
+
+static void _bw_setting(struct rtw89_dev *rtwdev, enum rtw89_rf_path path,
+			enum rtw89_bandwidth bw, bool dav)
+{
+	u32 rf_reg18;
+	u32 reg18_addr = dav ? RR_CFGCH : RR_CFGCH_V1;
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK]===> %s\n", __func__);
+
+	rf_reg18 = rtw89_read_rf(rtwdev, path, reg18_addr, RFREG_MASK);
+	if (rf_reg18 == INV_RF_DATA) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK,
+			    "[RFK]Invalid RF_0x18 for Path-%d\n", path);
+		return;
+	}
+	rf_reg18 &= ~RR_CFGCH_BW;
+
+	switch (bw) {
+	case RTW89_CHANNEL_WIDTH_5:
+	case RTW89_CHANNEL_WIDTH_10:
+	case RTW89_CHANNEL_WIDTH_20:
+		rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_20M);
+		break;
+	case RTW89_CHANNEL_WIDTH_40:
+		rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_40M);
+		break;
+	case RTW89_CHANNEL_WIDTH_80:
+		rf_reg18 |= FIELD_PREP(RR_CFGCH_BW, CFGCH_BW_80M);
+		break;
+	default:
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK]Fail to set CH\n");
+	}
+
+	rf_reg18 &= ~(RR_CFGCH_POW_LCK | RR_CFGCH_TRX_AH | RR_CFGCH_BCN |
+		      RR_CFGCH_BW2) & RFREG_MASK;
+	rf_reg18 |= RR_CFGCH_BW2;
+	rtw89_write_rf(rtwdev, path, reg18_addr, RFREG_MASK, rf_reg18);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK] set %x at path%d, %x =0x%x\n",
+		    bw, path, reg18_addr,
+		    rtw89_read_rf(rtwdev, path, reg18_addr, RFREG_MASK));
+}
+
+static void _ctrl_bw(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy,
+		     enum rtw89_bandwidth bw)
+{
+	_bw_setting(rtwdev, RF_PATH_A, bw, true);
+	_bw_setting(rtwdev, RF_PATH_B, bw, true);
+	_bw_setting(rtwdev, RF_PATH_A, bw, false);
+	_bw_setting(rtwdev, RF_PATH_B, bw, false);
+}
+
+static bool _set_s0_arfc18(struct rtw89_dev *rtwdev, u32 val)
+{
+	u32 bak;
+	u32 tmp;
+	int ret;
+
+	bak = rtw89_read_rf(rtwdev, RF_PATH_A, RR_LDO, RFREG_MASK);
+	rtw89_write_rf(rtwdev, RF_PATH_A, RR_LDO, RR_LDO_SEL, 0x1);
+	rtw89_write_rf(rtwdev, RF_PATH_A, RR_CFGCH, RFREG_MASK, val);
+
+	ret = read_poll_timeout_atomic(rtw89_read_rf, tmp, tmp == 0, 1, 1000,
+				       false, rtwdev, RF_PATH_A, RR_LPF, RR_LPF_BUSY);
+	if (ret)
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[LCK]LCK timeout\n");
+
+	rtw89_write_rf(rtwdev, RF_PATH_A, RR_LDO, RFREG_MASK, bak);
+
+	return !!ret;
+}
+
+static void _lck_check(struct rtw89_dev *rtwdev)
+{
+	u32 tmp;
+
+	if (rtw89_read_rf(rtwdev, RF_PATH_A, RR_SYNFB, RR_SYNFB_LK) == 0) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[LCK]SYN MMD reset\n");
+
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_MMD, RR_MMD_RST_EN, 0x1);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_MMD, RR_MMD_RST_SYN, 0x0);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_MMD, RR_MMD_RST_SYN, 0x1);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_MMD, RR_MMD_RST_EN, 0x0);
+	}
+
+	udelay(10);
+
+	if (rtw89_read_rf(rtwdev, RF_PATH_A, RR_SYNFB, RR_SYNFB_LK) == 0) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[LCK]re-set RF 0x18\n");
+
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_LCK_TRG, RR_LCK_TRGSEL, 0x1);
+		tmp = rtw89_read_rf(rtwdev, RF_PATH_A, RR_CFGCH, RFREG_MASK);
+		_set_s0_arfc18(rtwdev, tmp);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_LCK_TRG, RR_LCK_TRGSEL, 0x0);
+	}
+
+	if (rtw89_read_rf(rtwdev, RF_PATH_A, RR_SYNFB, RR_SYNFB_LK) == 0) {
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[LCK]SYN off/on\n");
+
+		tmp = rtw89_read_rf(rtwdev, RF_PATH_A, RR_POW, RFREG_MASK);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_POW, RFREG_MASK, tmp);
+		tmp = rtw89_read_rf(rtwdev, RF_PATH_A, RR_SX, RFREG_MASK);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_SX, RFREG_MASK, tmp);
+
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_SYNLUT, RR_SYNLUT_MOD, 0x1);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_POW, RR_POW_SYN, 0x0);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_POW, RR_POW_SYN, 0x3);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_SYNLUT, RR_SYNLUT_MOD, 0x0);
+
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_LCK_TRG, RR_LCK_TRGSEL, 0x1);
+		tmp = rtw89_read_rf(rtwdev, RF_PATH_A, RR_CFGCH, RFREG_MASK);
+		_set_s0_arfc18(rtwdev, tmp);
+		rtw89_write_rf(rtwdev, RF_PATH_A, RR_LCK_TRG, RR_LCK_TRGSEL, 0x0);
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK, "[LCK]0xb2=%x, 0xc5=%x\n",
+			    rtw89_read_rf(rtwdev, RF_PATH_A, RR_VCO, RFREG_MASK),
+			    rtw89_read_rf(rtwdev, RF_PATH_A, RR_SYNFB, RFREG_MASK));
+	}
+}
+
+static void _set_ch(struct rtw89_dev *rtwdev, u32 val)
+{
+	bool timeout;
+
+	timeout = _set_s0_arfc18(rtwdev, val);
+	if (!timeout)
+		_lck_check(rtwdev);
+}
+
+static void _ch_setting(struct rtw89_dev *rtwdev, enum rtw89_rf_path path,
+			u8 central_ch, bool dav)
+{
+	u32 reg18_addr = dav ? RR_CFGCH : RR_CFGCH_V1;
+	bool is_2g_ch = central_ch <= 14;
+	u32 rf_reg18;
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK]===> %s\n", __func__);
+
+	rf_reg18 = rtw89_read_rf(rtwdev, path, reg18_addr, RFREG_MASK);
+	rf_reg18 &= ~(RR_CFGCH_BAND1 | RR_CFGCH_POW_LCK | RR_CFGCH_TRX_AH |
+		      RR_CFGCH_BCN | RR_CFGCH_BAND0 | RR_CFGCH_CH);
+	rf_reg18 |= FIELD_PREP(RR_CFGCH_CH, central_ch);
+
+	if (!is_2g_ch)
+		rf_reg18 |= FIELD_PREP(RR_CFGCH_BAND1, CFGCH_BAND1_5G) |
+			    FIELD_PREP(RR_CFGCH_BAND0, CFGCH_BAND0_5G);
+
+	rf_reg18 &= ~(RR_CFGCH_POW_LCK | RR_CFGCH_TRX_AH | RR_CFGCH_BCN |
+		      RR_CFGCH_BW2) & RFREG_MASK;
+	rf_reg18 |= RR_CFGCH_BW2;
+
+	if (path == RF_PATH_A && dav)
+		_set_ch(rtwdev, rf_reg18);
+	else
+		rtw89_write_rf(rtwdev, path, reg18_addr, RFREG_MASK, rf_reg18);
+
+	rtw89_write_rf(rtwdev, path, RR_LCKST, RR_LCKST_BIN, 0);
+	rtw89_write_rf(rtwdev, path, RR_LCKST, RR_LCKST_BIN, 1);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK,
+		    "[RFK]CH: %d for Path-%d, reg0x%x = 0x%x\n",
+		    central_ch, path, reg18_addr,
+		    rtw89_read_rf(rtwdev, path, reg18_addr, RFREG_MASK));
+}
+
+static void _ctrl_ch(struct rtw89_dev *rtwdev, u8 central_ch)
+{
+	_ch_setting(rtwdev, RF_PATH_A, central_ch, true);
+	_ch_setting(rtwdev, RF_PATH_B, central_ch, true);
+	_ch_setting(rtwdev, RF_PATH_A, central_ch, false);
+	_ch_setting(rtwdev, RF_PATH_B, central_ch, false);
+}
+
+static void _set_rxbb_bw(struct rtw89_dev *rtwdev, enum rtw89_bandwidth bw,
+			 enum rtw89_rf_path path)
+{
+	rtw89_write_rf(rtwdev, path, RR_LUTWE2, RR_LUTWE2_RTXBW, 0x1);
+	rtw89_write_rf(rtwdev, path, RR_LUTWA, RR_LUTWA_M2, 0x12);
+
+	if (bw == RTW89_CHANNEL_WIDTH_20)
+		rtw89_write_rf(rtwdev, path, RR_LUTWD0, RR_LUTWD0_LB, 0x1b);
+	else if (bw == RTW89_CHANNEL_WIDTH_40)
+		rtw89_write_rf(rtwdev, path, RR_LUTWD0, RR_LUTWD0_LB, 0x13);
+	else if (bw == RTW89_CHANNEL_WIDTH_80)
+		rtw89_write_rf(rtwdev, path, RR_LUTWD0, RR_LUTWD0_LB, 0xb);
+	else
+		rtw89_write_rf(rtwdev, path, RR_LUTWD0, RR_LUTWD0_LB, 0x3);
+
+	rtw89_debug(rtwdev, RTW89_DBG_RFK, "[RFK] set S%d RXBB BW 0x3F = 0x%x\n", path,
+		    rtw89_read_rf(rtwdev, path, RR_LUTWD0, RR_LUTWD0_LB));
+
+	rtw89_write_rf(rtwdev, path, RR_LUTWE2, RR_LUTWE2_RTXBW, 0x0);
+}
+
+static void _rxbb_bw(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy,
+		     enum rtw89_bandwidth bw)
+{
+	u8 kpath, path;
+
+	kpath = _kpath(rtwdev, phy);
+
+	for (path = 0; path < RF_PATH_NUM_8852B; path++) {
+		if (!(kpath & BIT(path)))
+			continue;
+
+		_set_rxbb_bw(rtwdev, bw, path);
+	}
+}
+
+static void rtw8852b_ctrl_bw_ch(struct rtw89_dev *rtwdev,
+				enum rtw89_phy_idx phy, u8 central_ch,
+				enum rtw89_band band, enum rtw89_bandwidth bw)
+{
+	_ctrl_ch(rtwdev, central_ch);
+	_ctrl_bw(rtwdev, phy, bw);
+	_rxbb_bw(rtwdev, phy, bw);
+}
+
+void rtw8852b_set_channel_rf(struct rtw89_dev *rtwdev,
+			     const struct rtw89_chan *chan,
+			     enum rtw89_phy_idx phy_idx)
+{
+	rtw8852b_ctrl_bw_ch(rtwdev, phy_idx, chan->channel, chan->band_type,
+			    chan->band_width);
+}