/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2016 Carlo Caione <carlo@caione.org>
 */

#ifndef __MESON_GX_MMC_H__
#define __MESON_GX_MMC_H__

#include <mmc.h>
#include <linux/bitops.h>

enum meson_gx_mmc_compatible {
	MMC_COMPATIBLE_GX,
	MMC_COMPATIBLE_SM1,
};

#define SDIO_PORT_A			0
#define SDIO_PORT_B			1
#define SDIO_PORT_C			2

#define SD_EMMC_CLKSRC_24M		24000000	/* 24 MHz */
#define SD_EMMC_CLKSRC_DIV2		1000000000	/* 1 GHz */

#define MESON_SD_EMMC_CLOCK		0x00
#define   CLK_MAX_DIV			63
#define   CLK_SRC_24M			(0 << 6)
#define   CLK_SRC_DIV2			(1 << 6)
#define   CLK_CO_PHASE_000		(0 << 8)
#define   CLK_CO_PHASE_090		(1 << 8)
#define   CLK_CO_PHASE_180		(2 << 8)
#define   CLK_CO_PHASE_270		(3 << 8)
#define   CLK_TX_PHASE_000		(0 << 10)
#define   CLK_TX_PHASE_090		(1 << 10)
#define   CLK_TX_PHASE_180		(2 << 10)
#define   CLK_TX_PHASE_270		(3 << 10)
#define   CLK_ALWAYS_ON			BIT(24)

#define MESON_SD_EMMC_CFG		0x44
#define   CFG_BUS_WIDTH_MASK		GENMASK(1, 0)
#define   CFG_BUS_WIDTH_1		0
#define   CFG_BUS_WIDTH_4		1
#define   CFG_BUS_WIDTH_8		2
#define   CFG_BL_LEN_MASK		GENMASK(7, 4)
#define   CFG_BL_LEN_SHIFT		4
#define   CFG_BL_LEN_512		(9 << 4)
#define   CFG_RESP_TIMEOUT_MASK		GENMASK(11, 8)
#define   CFG_RESP_TIMEOUT_256		(8 << 8)
#define   CFG_RC_CC_MASK		GENMASK(15, 12)
#define   CFG_RC_CC_16			(4 << 12)
#define   CFG_SDCLK_ALWAYS_ON		BIT(18)
#define   CFG_AUTO_CLK			BIT(23)

#define MESON_SD_EMMC_STATUS		0x48
#define   STATUS_MASK			GENMASK(15, 0)
#define   STATUS_ERR_MASK		GENMASK(12, 0)
#define   STATUS_RXD_ERR_MASK		GENMASK(7, 0)
#define   STATUS_TXD_ERR		BIT(8)
#define   STATUS_DESC_ERR		BIT(9)
#define   STATUS_RESP_ERR		BIT(10)
#define   STATUS_RESP_TIMEOUT		BIT(11)
#define   STATUS_DESC_TIMEOUT		BIT(12)
#define   STATUS_END_OF_CHAIN		BIT(13)

#define MESON_SD_EMMC_IRQ_EN		0x4c

#define MESON_SD_EMMC_CMD_CFG		0x50
#define   CMD_CFG_LENGTH_MASK		GENMASK(8, 0)
#define   CMD_CFG_BLOCK_MODE		BIT(9)
#define   CMD_CFG_R1B			BIT(10)
#define   CMD_CFG_END_OF_CHAIN		BIT(11)
#define   CMD_CFG_TIMEOUT_4S		(12 << 12)
#define   CMD_CFG_NO_RESP		BIT(16)
#define   CMD_CFG_DATA_IO		BIT(18)
#define   CMD_CFG_DATA_WR		BIT(19)
#define   CMD_CFG_RESP_NOCRC		BIT(20)
#define   CMD_CFG_RESP_128		BIT(21)
#define   CMD_CFG_CMD_INDEX_SHIFT	24
#define   CMD_CFG_OWNER			BIT(31)

#define MESON_SD_EMMC_CMD_ARG		0x54
#define MESON_SD_EMMC_CMD_DAT		0x58
#define MESON_SD_EMMC_CMD_RSP		0x5c
#define MESON_SD_EMMC_CMD_RSP1		0x60
#define MESON_SD_EMMC_CMD_RSP2		0x64
#define MESON_SD_EMMC_CMD_RSP3		0x68

struct meson_mmc_plat {
	struct mmc_config cfg;
	struct mmc mmc;
	void *regbase;
	void *w_buf;
};

#endif