diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 610577d531c3..530add47e9c1 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -190,6 +190,13 @@ struct sd_switch_caps {
 #define SD_MAX_CURRENT_400	(1 << SD_SET_CURRENT_LIMIT_400)
 #define SD_MAX_CURRENT_600	(1 << SD_SET_CURRENT_LIMIT_600)
 #define SD_MAX_CURRENT_800	(1 << SD_SET_CURRENT_LIMIT_800)
+	unsigned int		sd4_curr_limit;
+#define SD4_SET_POWER_LIMIT_0_72W	0
+#define SD4_SET_POWER_LIMIT_1_44W	1
+#define SD4_SET_POWER_LIMIT_2_16W	2
+#define SD4_SET_POWER_LIMIT_2_88W	3
+#define SD4_SET_POWER_LIMIT_1_80W	4
+#define SD4_SET_POWER_NO_CHANGE		(-1)
 };
 
 struct sd_ext_reg {
@@ -213,7 +220,35 @@ struct sd_ext_reg {
 
 struct sd_uhs2_config {
 	u32			node_id;
-	/* TODO: Extend with more register configs. */
+
+	u32			dap;
+	u32			gap;
+	u32			n_fcu;
+	u32			maxblk_len;
+	u8			n_lanes;
+	u8			dadr_len;
+	u8			app_type;
+	u8			phy_minor_rev;
+	u8			phy_major_rev;
+	u8			can_hibernate;
+	u8			n_lss_sync;
+	u8			n_lss_dir;
+	u8			link_minor_rev;
+	u8			link_major_rev;
+	u8			dev_type;
+	u8			n_data_gap;
+
+	u32			n_fcu_set;
+	u32			maxblk_len_set;
+	u8			n_lanes_set;
+	u8			speed_range_set;
+	u8			n_lss_sync_set;
+	u8			n_lss_dir_set;
+	u8			n_data_gap_set;
+	u8			pwrctrl_mode_set;
+	u8			max_retry_set;
+
+	u8			cfg_complete;
 };
 
 struct sdio_cccr {
@@ -321,6 +356,9 @@ struct mmc_card {
 	struct sd_ext_reg	ext_perf;	/* SD extension reg for PERF */
 
 	struct sd_uhs2_config	uhs2_config;	/* SD UHS-II config */
+	u8			uhs2_state;	/* SD UHS-II states */
+#define MMC_UHS2_INITIALIZED	BIT(1)
+#define MMC_UHS2_SPEED_B	BIT(2)
 
 	unsigned int		sdio_funcs;	/* number of SDIO functions */
 	atomic_t		sdio_funcs_probed; /* number of probed SDIO funcs */
@@ -356,4 +394,6 @@ bool mmc_card_is_blockaddr(struct mmc_card *card);
 #define mmc_card_sd(c)		((c)->type == MMC_TYPE_SD)
 #define mmc_card_sdio(c)	((c)->type == MMC_TYPE_SDIO)
 
+#define mmc_card_can_poweroff_notify(c)	((c)->ext_power.feature_support & SD_EXT_POWER_OFF_NOTIFY)
+
 #endif /* LINUX_MMC_CARD_H */
diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h
index 71101d1ec825..f0154ecb39f9 100644
--- a/include/linux/mmc/core.h
+++ b/include/linux/mmc/core.h
@@ -23,6 +23,14 @@ enum mmc_blk_status {
 	MMC_BLK_NEW_REQUEST,
 };
 
+struct uhs2_command {
+	u16	header;
+	u16	arg;
+	__be32	*payload;
+	u32	payload_len;
+	u32	packet_len;
+};
+
 struct mmc_command {
 	u32			opcode;
 	u32			arg;
@@ -109,6 +117,11 @@ struct mmc_command {
 	unsigned int		busy_timeout;	/* busy detect timeout in ms */
 	struct mmc_data		*data;		/* data segment associated with cmd */
 	struct mmc_request	*mrq;		/* associated request */
+
+	struct uhs2_command	*uhs2_cmd;	/* UHS2 command */
+	u8			*uhs2_resp;	/* UHS2 native cmd resp */
+	u8			uhs2_resp_len;	/* UHS2 native cmd resp len */
+	u8			uhs2_tmode0_flag; /* UHS2 transfer mode flag */
 };
 
 struct mmc_data {
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index dd073ab54c02..116f71415d52 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -96,7 +96,48 @@ struct mmc_clk_phase_map {
 };
 
 struct sd_uhs2_caps {
-	/* TODO: Add UHS-II capabilities for the host. */
+	u32	dap;
+	u32	gap;
+	u32	group_desc;
+	u32	maxblk_len;
+	u32	n_fcu;
+	u8	n_lanes;
+	u8	addr64;
+	u8	card_type;
+	u8	phy_rev;
+	u8	speed_range;
+	u8	can_hibernate;
+	u8	n_lss_sync;
+	u8	n_lss_dir;
+	u8	link_rev;
+	u8	host_type;
+	u8	n_data_gap;
+
+	u32	maxblk_len_set;
+	u32	n_fcu_set;
+	u8	n_lanes_set;
+	u8	n_lss_sync_set;
+	u8	n_lss_dir_set;
+	u8	n_data_gap_set;
+	u8	max_retry_set;
+};
+
+struct sd_uhs2_ios {
+	bool		is_2L_HD_mode;
+	bool		is_APP_CMD;
+	unsigned int	power_delay_ms;		/* waiting for stable power */
+};
+
+enum sd_uhs2_operation {
+	UHS2_PHY_INIT = 0,
+	UHS2_SET_CONFIG,
+	UHS2_ENABLE_INT,
+	UHS2_DISABLE_INT,
+	UHS2_ENABLE_CLK,
+	UHS2_DISABLE_CLK,
+	UHS2_CHECK_DORMANT,
+	UHS2_SET_SPEED_B,
+	UHS2_POST_ATTACH_SD,
 };
 
 struct mmc_host;
@@ -212,6 +253,14 @@ struct mmc_host_ops {
 
 	/* Initialize an SD express card, mandatory for MMC_CAP2_SD_EXP. */
 	int	(*init_sd_express)(struct mmc_host *host, struct mmc_ios *ios);
+
+	/*
+	 * The uhs2_control callback is used to execute SD UHS-II specific
+	 * operations. It's mandatory to implement for hosts that supports the
+	 * SD UHS-II interface (MMC_CAP2_SD_UHS2). Expected return values are a
+	 * negative errno in case of a failure or zero for success.
+	 */
+	int	(*uhs2_control)(struct mmc_host *host, enum sd_uhs2_operation op);
 };
 
 struct mmc_cqe_ops {
@@ -425,6 +474,7 @@ struct mmc_host {
 #define MMC_CAP2_ALT_GPT_TEGRA	(1 << 28)	/* Host with eMMC that has GPT entry at a non-standard location */
 
 	struct sd_uhs2_caps	uhs2_caps;	/* Host UHS-II capabilities */
+	struct sd_uhs2_ios	uhs2_ios;	/* Host UHS-II capabilities */
 
 	int			fixed_drv_type;	/* fixed driver type for non-removable media */
 
@@ -669,4 +719,7 @@ int mmc_send_tuning(struct mmc_host *host, u32 opcode, int *cmd_error);
 int mmc_send_abort_tuning(struct mmc_host *host, u32 opcode);
 int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd);
 
+#define mmc_uhs2_2L_HD_mode(h)	((h)->uhs2_ios.is_2L_HD_mode)
+#define mmc_uhs2_APP_cmd(h)	((h)->uhs2_ios.is_APP_CMD)
+
 #endif /* LINUX_MMC_HOST_H */
diff --git a/include/linux/mmc/sd_uhs2.h b/include/linux/mmc/sd_uhs2.h
new file mode 100644
index 000000000000..8fcf702cf4a5
--- /dev/null
+++ b/include/linux/mmc/sd_uhs2.h
@@ -0,0 +1,263 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Header file for UHS-II packets, Host Controller registers and I/O
+ * accessors.
+ *
+ *  Copyright (C) 2014 Intel Corp, All Rights Reserved.
+ */
+#ifndef LINUX_MMC_UHS2_H
+#define LINUX_MMC_UHS2_H
+
+/* LINK Layer definition */
+/*
+ * UHS2 Header:
+ * Refer to UHS-II Addendum Version 1.02 Figure 5-2, the format of CCMD Header is described below:
+ *      bit [3:0]  : DID(Destination ID = Node ID of UHS2 card)
+ *      bit [6:4]  : TYP(Packet Type)
+ *                   000b: CCMD(Control command packet)
+ *                   001b: DCMD(Data command packet)
+ *                   010b: RES(Response packet)
+ *                   011b: DATA(Data payload packet)
+ *                   111b: MSG(Message packet)
+ *                   Others: Reserved
+ *      bit [7]    : NP(Native Packet)
+ *      bit [10:8] : TID(Transaction ID)
+ *      bit [11]   : Reserved
+ *      bit [15:12]: SID(Source ID 0: Node ID of Host)
+ *
+ * Broadcast CCMD issued by Host is represented as DID=SID=0.
+ */
+/*
+ * UHS2 Argument:
+ * Refer to UHS-II Addendum Version 1.02 Figure 6-5, the format of CCMD Argument is described below:
+ *      bit [3:0]  : MSB of IOADR
+ *      bit [5:4]  : PLEN(Payload Length)
+ *                   00b: 0 byte
+ *                   01b: 4 bytes
+ *                   10b: 8 bytes
+ *                   11b: 16 bytes
+ *      bit [6]    : Reserved
+ *      bit [7]    : R/W(Read/Write)
+ *                   0: Control read command
+ *                   1: Control write command
+ *      bit [15:8] : LSB of IOADR
+ *
+ * I/O Address specifies the address of register in UHS-II I/O space accessed by CCMD.
+ * The unit of I/O Address is 4 Bytes. It is transmitted in MSB first, LSB last.
+ */
+#define UHS2_NATIVE_PACKET_POS	7
+#define UHS2_NATIVE_PACKET	(1 << UHS2_NATIVE_PACKET_POS)
+
+#define UHS2_PACKET_TYPE_POS	4
+#define UHS2_PACKET_TYPE_CCMD	(0 << UHS2_PACKET_TYPE_POS)
+#define UHS2_PACKET_TYPE_DCMD	(1 << UHS2_PACKET_TYPE_POS)
+#define UHS2_PACKET_TYPE_RES	(2 << UHS2_PACKET_TYPE_POS)
+#define UHS2_PACKET_TYPE_DATA	(3 << UHS2_PACKET_TYPE_POS)
+#define UHS2_PACKET_TYPE_MSG	(7 << UHS2_PACKET_TYPE_POS)
+
+#define UHS2_DEST_ID_MASK	0x0F
+#define UHS2_DEST_ID		0x1
+
+#define UHS2_SRC_ID_POS		12
+#define UHS2_SRC_ID_MASK	0xF000
+
+#define UHS2_TRANS_ID_POS	8
+#define UHS2_TRANS_ID_MASK	0x0700
+
+/* UHS2 MSG */
+#define UHS2_MSG_CTG_POS	5
+#define UHS2_MSG_CTG_LMSG	0x00
+#define UHS2_MSG_CTG_INT	0x60
+#define UHS2_MSG_CTG_AMSG	0x80
+
+#define UHS2_MSG_CTG_FCREQ	0x00
+#define UHS2_MSG_CTG_FCRDY	0x01
+#define UHS2_MSG_CTG_STAT	0x02
+
+#define UHS2_MSG_CODE_POS			8
+#define UHS2_MSG_CODE_FC_UNRECOVER_ERR		0x8
+#define UHS2_MSG_CODE_STAT_UNRECOVER_ERR	0x8
+#define UHS2_MSG_CODE_STAT_RECOVER_ERR		0x1
+
+/* TRANS Layer definition */
+
+/* Native packets*/
+#define UHS2_NATIVE_CMD_RW_POS	7
+#define UHS2_NATIVE_CMD_WRITE	(1 << UHS2_NATIVE_CMD_RW_POS)
+#define UHS2_NATIVE_CMD_READ	(0 << UHS2_NATIVE_CMD_RW_POS)
+
+#define UHS2_NATIVE_CMD_PLEN_POS	4
+#define UHS2_NATIVE_CMD_PLEN_4B		(1 << UHS2_NATIVE_CMD_PLEN_POS)
+#define UHS2_NATIVE_CMD_PLEN_8B		(2 << UHS2_NATIVE_CMD_PLEN_POS)
+#define UHS2_NATIVE_CMD_PLEN_16B	(3 << UHS2_NATIVE_CMD_PLEN_POS)
+
+#define UHS2_NATIVE_CCMD_GET_MIOADR_MASK	0xF00
+#define UHS2_NATIVE_CCMD_MIOADR_MASK		0x0F
+
+#define UHS2_NATIVE_CCMD_LIOADR_POS		8
+#define UHS2_NATIVE_CCMD_GET_LIOADR_MASK	0x0FF
+
+#define UHS2_CCMD_DEV_INIT_COMPLETE_FLAG	BIT(11)
+#define UHS2_DEV_INIT_PAYLOAD_LEN		1
+#define UHS2_DEV_INIT_RESP_LEN			6
+#define UHS2_DEV_ENUM_PAYLOAD_LEN		1
+#define UHS2_DEV_ENUM_RESP_LEN			8
+#define UHS2_CFG_WRITE_PAYLOAD_LEN		2
+#define UHS2_CFG_WRITE_PHY_SET_RESP_LEN		4
+#define UHS2_CFG_WRITE_GENERIC_SET_RESP_LEN	5
+#define UHS2_GO_DORMANT_PAYLOAD_LEN		1
+
+/*
+ * UHS2 Argument:
+ * Refer to UHS-II Addendum Version 1.02 Figure 6-8, the format of DCMD Argument is described below:
+ *      bit [3:0]  : Reserved
+ *      bit [6:3]  : TMODE(Transfer Mode)
+ *                   bit 3: DAM(Data Access Mode)
+ *                   bit 4: TLUM(TLEN Unit Mode)
+ *                   bit 5: LM(Length Mode)
+ *                   bit 6: DM(Duplex Mode)
+ *      bit [7]    : R/W(Read/Write)
+ *                   0: Control read command
+ *                   1: Control write command
+ *      bit [15:8] : Reserved
+ *
+ * I/O Address specifies the address of register in UHS-II I/O space accessed by CCMD.
+ * The unit of I/O Address is 4 Bytes. It is transmitted in MSB first, LSB last.
+ */
+#define UHS2_DCMD_DM_POS		6
+#define UHS2_DCMD_2L_HD_MODE		(1 << UHS2_DCMD_DM_POS)
+#define UHS2_DCMD_LM_POS		5
+#define UHS2_DCMD_LM_TLEN_EXIST		(1 << UHS2_DCMD_LM_POS)
+#define UHS2_DCMD_TLUM_POS		4
+#define UHS2_DCMD_TLUM_BYTE_MODE	(1 << UHS2_DCMD_TLUM_POS)
+#define UHS2_NATIVE_DCMD_DAM_POS	3
+#define UHS2_NATIVE_DCMD_DAM_IO		(1 << UHS2_NATIVE_DCMD_DAM_POS)
+
+/*
+ * Per UHS2 spec, DCMD payload should be MSB first. There may be
+ * two types of data be assembled to MSB:
+ * 1. TLEN: Input block size for single read/write and number of blocks
+ * for multiple read/write to calculate TLEN as MSB first per spec.
+ * 2. SD command argument.
+ */
+static inline __be32 uhs2_dcmd_convert_msb(u32 input)
+{
+	u32 ret = 0;
+
+	ret = ((input & 0xFF) << 24) |
+		(((input >> 8) & 0xFF) << 16) |
+		(((input >> 16) & 0xFF) << 8) |
+		((input >> 24) & 0xFF);
+	return cpu_to_be32(ret);
+}
+
+#define UHS2_RES_NACK_POS	7
+#define UHS2_RES_NACK_MASK	(0x1 << UHS2_RES_NACK_POS)
+
+#define UHS2_RES_ECODE_POS	4
+#define UHS2_RES_ECODE_MASK	0x7
+#define UHS2_RES_ECODE_COND	1
+#define UHS2_RES_ECODE_ARG	2
+#define UHS2_RES_ECODE_GEN	3
+
+/* IOADR of device registers */
+#define UHS2_IOADR_GENERIC_CAPS		0x00
+#define UHS2_IOADR_PHY_CAPS		0x02
+#define UHS2_IOADR_LINK_CAPS		0x04
+#define UHS2_IOADR_RSV_CAPS		0x06
+#define UHS2_IOADR_GENERIC_SETTINGS	0x08
+#define UHS2_IOADR_PHY_SETTINGS		0x0A
+#define UHS2_IOADR_LINK_SETTINGS	0x0C
+#define UHS2_IOADR_PRESET		0x40
+
+/* SD application packets */
+#define UHS2_SD_CMD_INDEX_POS	8
+
+#define UHS2_SD_CMD_APP_POS	14
+#define UHS2_SD_CMD_APP		(1 << UHS2_SD_CMD_APP_POS)
+
+/* UHS-II Device Registers */
+#define UHS2_DEV_CONFIG_REG	0x000
+
+/* General Caps and Settings registers */
+#define UHS2_DEV_CONFIG_GEN_CAPS	(UHS2_DEV_CONFIG_REG + 0x000)
+#define UHS2_DEV_CONFIG_N_LANES_POS	8
+#define UHS2_DEV_CONFIG_N_LANES_MASK	0x3F
+#define UHS2_DEV_CONFIG_2L_HD_FD	0x1
+#define UHS2_DEV_CONFIG_2D1U_FD		0x2
+#define UHS2_DEV_CONFIG_1D2U_FD		0x4
+#define UHS2_DEV_CONFIG_2D2U_FD		0x8
+#define UHS2_DEV_CONFIG_DADR_POS	14
+#define UHS2_DEV_CONFIG_DADR_MASK	0x1
+#define UHS2_DEV_CONFIG_APP_POS		16
+#define UHS2_DEV_CONFIG_APP_MASK	0xFF
+#define UHS2_DEV_CONFIG_APP_SD_MEM	0x1
+
+#define UHS2_DEV_CONFIG_GEN_SET			(UHS2_DEV_CONFIG_REG + 0x008)
+#define UHS2_DEV_CONFIG_GEN_SET_N_LANES_POS	8
+#define UHS2_DEV_CONFIG_GEN_SET_2L_FD_HD	0x0
+#define UHS2_DEV_CONFIG_GEN_SET_2D1U_FD		0x2
+#define UHS2_DEV_CONFIG_GEN_SET_1D2U_FD		0x3
+#define UHS2_DEV_CONFIG_GEN_SET_2D2U_FD		0x4
+#define UHS2_DEV_CONFIG_GEN_SET_CFG_COMPLETE	BIT(31)
+
+/* PHY Caps and Settings registers */
+#define UHS2_DEV_CONFIG_PHY_CAPS	(UHS2_DEV_CONFIG_REG + 0x002)
+#define UHS2_DEV_CONFIG_PHY_MINOR_MASK	0xF
+#define UHS2_DEV_CONFIG_PHY_MAJOR_POS	4
+#define UHS2_DEV_CONFIG_PHY_MAJOR_MASK	0x3
+#define UHS2_DEV_CONFIG_CAN_HIBER_POS	15
+#define UHS2_DEV_CONFIG_CAN_HIBER_MASK	0x1
+#define UHS2_DEV_CONFIG_PHY_CAPS1	(UHS2_DEV_CONFIG_REG + 0x003)
+#define UHS2_DEV_CONFIG_N_LSS_SYN_MASK	0xF
+#define UHS2_DEV_CONFIG_N_LSS_DIR_POS	4
+#define UHS2_DEV_CONFIG_N_LSS_DIR_MASK	0xF
+
+#define UHS2_DEV_CONFIG_PHY_SET			(UHS2_DEV_CONFIG_REG + 0x00A)
+#define UHS2_DEV_CONFIG_PHY_SET_SPEED_POS	6
+#define UHS2_DEV_CONFIG_PHY_SET_SPEED_A		0x0
+#define UHS2_DEV_CONFIG_PHY_SET_SPEED_B		0x1
+
+/* LINK-TRAN Caps and Settings registers */
+#define UHS2_DEV_CONFIG_LINK_TRAN_CAPS		(UHS2_DEV_CONFIG_REG + 0x004)
+#define UHS2_DEV_CONFIG_LT_MINOR_MASK		0xF
+#define UHS2_DEV_CONFIG_LT_MAJOR_POS		4
+#define UHS2_DEV_CONFIG_LT_MAJOR_MASK		0x3
+#define UHS2_DEV_CONFIG_N_FCU_POS		8
+#define UHS2_DEV_CONFIG_N_FCU_MASK		0xFF
+#define UHS2_DEV_CONFIG_DEV_TYPE_POS		16
+#define UHS2_DEV_CONFIG_DEV_TYPE_MASK		0x7
+#define UHS2_DEV_CONFIG_MAX_BLK_LEN_POS		20
+#define UHS2_DEV_CONFIG_MAX_BLK_LEN_MASK	0xFFF
+#define UHS2_DEV_CONFIG_LINK_TRAN_CAPS1		(UHS2_DEV_CONFIG_REG + 0x005)
+#define UHS2_DEV_CONFIG_N_DATA_GAP_MASK		0xFF
+
+#define UHS2_DEV_CONFIG_LINK_TRAN_SET		(UHS2_DEV_CONFIG_REG + 0x00C)
+#define UHS2_DEV_CONFIG_LT_SET_MAX_BLK_LEN	0x200
+#define UHS2_DEV_CONFIG_LT_SET_MAX_RETRY_POS	16
+
+/* Preset register */
+#define UHS2_DEV_CONFIG_PRESET	(UHS2_DEV_CONFIG_REG + 0x040)
+
+#define UHS2_DEV_INT_REG	0x100
+
+#define UHS2_DEV_STATUS_REG	0x180
+
+#define UHS2_DEV_CMD_REG		0x200
+#define UHS2_DEV_CMD_FULL_RESET		(UHS2_DEV_CMD_REG + 0x000)
+#define UHS2_DEV_CMD_GO_DORMANT_STATE	(UHS2_DEV_CMD_REG + 0x001)
+#define UHS2_DEV_CMD_DORMANT_HIBER	BIT(7)
+#define UHS2_DEV_CMD_DEVICE_INIT	(UHS2_DEV_CMD_REG + 0x002)
+#define UHS2_DEV_INIT_COMPLETE_FLAG	BIT(11)
+#define UHS2_DEV_CMD_ENUMERATE		(UHS2_DEV_CMD_REG + 0x003)
+#define UHS2_DEV_CMD_TRANS_ABORT	(UHS2_DEV_CMD_REG + 0x004)
+
+#define UHS2_RCLK_MAX	52000000
+#define UHS2_RCLK_MIN	26000000
+
+struct sd_uhs2_wait_active_state_data {
+	struct mmc_host *host;
+	struct mmc_command *cmd;
+};
+
+#endif /* LINUX_MMC_UHS2_H */
