rtw88: 8723d: Add new chip op efuse_grant() to control efuse access

8723D devices need to grant efuse access before dumping physical efuse
map, other chips don't need it, so keep this ops as blank.
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200420055054.14592-8-yhchuang@realtek.com

drivers/net/wireless/realtek/rtw88/efuse.c

@@ -90,6 +90,8 @@ static int rtw_dump_physical_efuse_map(struct rtw_dev *rtwdev, u8 *map)
 	u32 addr;
 	u32 cnt;
 
+	rtw_chip_efuse_grant_on(rtwdev);
+
 	switch_efuse_bank(rtwdev);
 
 	/* disable 2.5V LDO */
@@ -113,6 +115,8 @@ static int rtw_dump_physical_efuse_map(struct rtw_dev *rtwdev, u8 *map)
 		*(map + addr) = (u8)(efuse_ctl & BIT_MASK_EF_DATA);
 	}
 
+	rtw_chip_efuse_grant_off(rtwdev);
+
 	return 0;
 }
 

drivers/net/wireless/realtek/rtw88/main.h

@@ -811,6 +811,7 @@ struct rtw_chip_ops {
 			   u32 antenna_tx,
 			   u32 antenna_rx);
 	void (*cfg_ldo25)(struct rtw_dev *rtwdev, bool enable);
+	void (*efuse_grant)(struct rtw_dev *rtwdev, bool enable);
 	void (*false_alarm_statistics)(struct rtw_dev *rtwdev);
 	void (*phy_calibration)(struct rtw_dev *rtwdev);
 	void (*dpk_track)(struct rtw_dev *rtwdev);
@@ -1712,6 +1713,18 @@ static inline bool rtw_ssid_equal(struct cfg80211_ssid *a,
 	return true;
 }
 
+static inline void rtw_chip_efuse_grant_on(struct rtw_dev *rtwdev)
+{
+	if (rtwdev->chip->ops->efuse_grant)
+		rtwdev->chip->ops->efuse_grant(rtwdev, true);
+}
+
+static inline void rtw_chip_efuse_grant_off(struct rtw_dev *rtwdev)
+{
+	if (rtwdev->chip->ops->efuse_grant)
+		rtwdev->chip->ops->efuse_grant(rtwdev, false);
+}
+
 void rtw_get_channel_params(struct cfg80211_chan_def *chandef,
 			    struct rtw_channel_params *ch_param);
 bool check_hw_ready(struct rtw_dev *rtwdev, u32 addr, u32 mask, u32 target);

drivers/net/wireless/realtek/rtw88/reg.h

@@ -6,6 +6,7 @@
 #define __RTW_REG_DEF_H__
 
 #define REG_SYS_FUNC_EN		0x0002
+#define BIT_FEN_ELDR		BIT(12)
 #define BIT_FEN_CPUEN		BIT(2)
 #define BIT_FEN_BB_GLB_RST	BIT(1)
 #define BIT_FEN_BB_RSTB		BIT(0)
@@ -15,6 +16,10 @@
 #define REG_SYS_CLK_CTRL	0x0008
 #define BIT_CPU_CLK_EN		BIT(14)
 
+#define REG_SYS_CLKR		0x0008
+#define BIT_ANA8M		BIT(1)
+#define BIT_LOADER_CLK_EN	BIT(5)
+
 #define REG_RSV_CTRL		0x001C
 #define DISABLE_PI		0x3
 #define ENABLE_PI		0x2
@@ -87,6 +92,10 @@
 				 BIT_CHECK_SUM_OK)
 #define FW_READY_MASK		0xffff
 
+#define REG_EFUSE_ACCESS	0x00CF
+#define EFUSE_ACCESS_ON		0x69
+#define EFUSE_ACCESS_OFF	0x00
+
 #define REG_WLRF1		0x00EC
 #define REG_WIFI_BT_INFO	0x00AA
 #define BIT_BT_INT_EN		BIT(15)

drivers/net/wireless/realtek/rtw88/rtw8723d.c

@@ -28,11 +28,24 @@ static void rtw8723d_cfg_ldo25(struct rtw_dev *rtwdev, bool enable)
 	rtw_write8(rtwdev, REG_LDO_EFUSE_CTRL + 3, ldo_pwr);
 }
 
+static void rtw8723d_efuse_grant(struct rtw_dev *rtwdev, bool on)
+{
+	if (on) {
+		rtw_write8(rtwdev, REG_EFUSE_ACCESS, EFUSE_ACCESS_ON);
+
+		rtw_write16_set(rtwdev, REG_SYS_FUNC_EN, BIT_FEN_ELDR);
+		rtw_write16_set(rtwdev, REG_SYS_CLKR, BIT_LOADER_CLK_EN | BIT_ANA8M);
+	} else {
+		rtw_write8(rtwdev, REG_EFUSE_ACCESS, EFUSE_ACCESS_OFF);
+	}
+}
+
 static struct rtw_chip_ops rtw8723d_ops = {
 	.read_rf		= rtw_phy_read_rf_sipi,
 	.write_rf		= rtw_phy_write_rf_reg_sipi,
 	.set_antenna		= NULL,
 	.cfg_ldo25		= rtw8723d_cfg_ldo25,
+	.efuse_grant		= rtw8723d_efuse_grant,
 	.config_bfee		= NULL,
 	.set_gid_table		= NULL,
 	.cfg_csi_rate		= NULL,