diff --git a/include/drivers/mmc.h b/include/drivers/mmc.h
index c154ea5..e973248 100644
--- a/include/drivers/mmc.h
+++ b/include/drivers/mmc.h
@@ -111,6 +111,7 @@
 #define MMC_STATE_SLP			10
 
 #define MMC_FLAG_CMD23			(U(1) << 0)
+#define MMC_FLAG_SD_CMD6		(U(1) << 1)
 
 #define CMD8_CHECK_PATTERN		U(0xAA)
 #define VHS_2_7_3_6_V			BIT(8)
@@ -118,6 +119,10 @@
 #define SD_SCR_BUS_WIDTH_1		BIT(8)
 #define SD_SCR_BUS_WIDTH_4		BIT(10)
 
+#define SD_SWITCH_FUNC_CHECK		0U
+#define SD_SWITCH_FUNC_SWITCH		BIT(31)
+#define SD_SWITCH_ALL_GROUPS_MASK	GENMASK(23, 0)
+
 struct mmc_cmd {
 	unsigned int	cmd_idx;
 	unsigned int	cmd_arg;
@@ -217,6 +222,27 @@
 	unsigned int		csd_structure:		2;
 };
 
+struct sd_switch_status {
+	unsigned short		max_current;
+	unsigned short		support_g6;
+	unsigned short		support_g5;
+	unsigned short		support_g4;
+	unsigned short		support_g3;
+	unsigned short		support_g2;
+	unsigned short		support_g1;
+	unsigned char		sel_g6_g5;
+	unsigned char		sel_g4_g3;
+	unsigned char		sel_g2_g1;
+	unsigned char		data_struct_ver;
+	unsigned short		busy_g6;
+	unsigned short		busy_g5;
+	unsigned short		busy_g4;
+	unsigned short		busy_g3;
+	unsigned short		busy_g2;
+	unsigned short		busy_g1;
+	unsigned short		reserved[17];
+};
+
 enum mmc_device_type {
 	MMC_IS_EMMC,
 	MMC_IS_SD,