include/fsl_esdhc_imx.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * FSL SD/MMC Defines
 *-------------------------------------------------------------------
 *
 * Copyright 2019 NXP
 * Yangbo Lu <yangbo.lu@nxp.com>
 *
 * Copyright 2007-2008,2010-2011 Freescale Semiconductor, Inc
 */

#ifndef __FSL_ESDHC_IMX_H__
#define __FSL_ESDHC_IMX_H__

#include <linux/bitops.h>
#include <linux/errno.h>
#include <asm/byteorder.h>

/* needed for the mmc_cfg definition */
#include <mmc.h>

/* FSL eSDHC-specific constants */
#define SYSCTL			0x0002e02c
#define SYSCTL_INITA		0x08000000
#define SYSCTL_TIMEOUT_MASK	0x000f0000
#define SYSCTL_CLOCK_MASK	0x0000fff0
#define SYSCTL_CKEN		0x00000008
#define SYSCTL_PEREN		0x00000004
#define SYSCTL_HCKEN		0x00000002
#define SYSCTL_IPGEN		0x00000001
#define SYSCTL_RSTA		0x01000000
#define SYSCTL_RSTC		0x02000000
#define SYSCTL_RSTD		0x04000000

#define VENDORSPEC_CKEN		0x00004000
#define VENDORSPEC_PEREN	0x00002000
#define VENDORSPEC_HCKEN	0x00001000
#define VENDORSPEC_IPGEN	0x00000800
#define VENDORSPEC_INIT		0x20007809
#define VENDORSPEC_FRC_SDCLK_ON 0x00000100

#define IRQSTAT			0x0002e030
#define IRQSTAT_DMAE		(0x10000000)
#define IRQSTAT_AC12E		(0x01000000)
#define IRQSTAT_DEBE		(0x00400000)
#define IRQSTAT_DCE		(0x00200000)
#define IRQSTAT_DTOE		(0x00100000)
#define IRQSTAT_CIE		(0x00080000)
#define IRQSTAT_CEBE		(0x00040000)
#define IRQSTAT_CCE		(0x00020000)
#define IRQSTAT_CTOE		(0x00010000)
#define IRQSTAT_CINT		(0x00000100)
#define IRQSTAT_CRM		(0x00000080)
#define IRQSTAT_CINS		(0x00000040)
#define IRQSTAT_BRR		(0x00000020)
#define IRQSTAT_BWR		(0x00000010)
#define IRQSTAT_DINT		(0x00000008)
#define IRQSTAT_BGE		(0x00000004)
#define IRQSTAT_TC		(0x00000002)
#define IRQSTAT_CC		(0x00000001)

#define CMD_ERR		(IRQSTAT_CIE | IRQSTAT_CEBE | IRQSTAT_CCE)
#define DATA_ERR	(IRQSTAT_DEBE | IRQSTAT_DCE | IRQSTAT_DTOE | \
				IRQSTAT_DMAE)
#define DATA_COMPLETE	(IRQSTAT_TC | IRQSTAT_DINT)

#define IRQSTATEN		0x0002e034
#define IRQSTATEN_DMAE		(0x10000000)
#define IRQSTATEN_AC12E		(0x01000000)
#define IRQSTATEN_DEBE		(0x00400000)
#define IRQSTATEN_DCE		(0x00200000)
#define IRQSTATEN_DTOE		(0x00100000)
#define IRQSTATEN_CIE		(0x00080000)
#define IRQSTATEN_CEBE		(0x00040000)
#define IRQSTATEN_CCE		(0x00020000)
#define IRQSTATEN_CTOE		(0x00010000)
#define IRQSTATEN_CINT		(0x00000100)
#define IRQSTATEN_CRM		(0x00000080)
#define IRQSTATEN_CINS		(0x00000040)
#define IRQSTATEN_BRR		(0x00000020)
#define IRQSTATEN_BWR		(0x00000010)
#define IRQSTATEN_DINT		(0x00000008)
#define IRQSTATEN_BGE		(0x00000004)
#define IRQSTATEN_TC		(0x00000002)
#define IRQSTATEN_CC		(0x00000001)

#define ESDHCCTL		0x0002e40c
#define ESDHCCTL_PCS		(0x00080000)

#define PRSSTAT			0x0002e024
#define PRSSTAT_DAT0		(0x01000000)
#define PRSSTAT_CLSL		(0x00800000)
#define PRSSTAT_WPSPL		(0x00080000)
#define PRSSTAT_CDPL		(0x00040000)
#define PRSSTAT_CINS		(0x00010000)
#define PRSSTAT_BREN		(0x00000800)
#define PRSSTAT_BWEN		(0x00000400)
#define PRSSTAT_SDOFF		(0x00000080)
#define PRSSTAT_SDSTB		(0X00000008)
#define PRSSTAT_DLA		(0x00000004)
#define PRSSTAT_CICHB		(0x00000002)
#define PRSSTAT_CIDHB		(0x00000001)

#define PROCTL			0x0002e028
#define PROCTL_INIT		0x00000020
#define PROCTL_DTW_4		0x00000002
#define PROCTL_DTW_8		0x00000004
#define PROCTL_D3CD		0x00000008

#define CMDARG			0x0002e008

#define XFERTYP			0x0002e00c
#define XFERTYP_CMD(x)		((x & 0x3f) << 24)
#define XFERTYP_CMDTYP_NORMAL	0x0
#define XFERTYP_CMDTYP_SUSPEND	0x00400000
#define XFERTYP_CMDTYP_RESUME	0x00800000
#define XFERTYP_CMDTYP_ABORT	0x00c00000
#define XFERTYP_DPSEL		0x00200000
#define XFERTYP_CICEN		0x00100000
#define XFERTYP_CCCEN		0x00080000
#define XFERTYP_RSPTYP_NONE	0
#define XFERTYP_RSPTYP_136	0x00010000
#define XFERTYP_RSPTYP_48	0x00020000
#define XFERTYP_RSPTYP_48_BUSY	0x00030000
#define XFERTYP_MSBSEL		0x00000020
#define XFERTYP_DTDSEL		0x00000010
#define XFERTYP_DDREN		0x00000008
#define XFERTYP_AC12EN		0x00000004
#define XFERTYP_BCEN		0x00000002
#define XFERTYP_DMAEN		0x00000001

#define CINS_TIMEOUT		1000
#define PIO_TIMEOUT		500

#define DSADDR		0x2e004

#define CMDRSP0		0x2e010
#define CMDRSP1		0x2e014
#define CMDRSP2		0x2e018
#define CMDRSP3		0x2e01c

#define DATPORT		0x2e020

#define WML		0x2e044
#define WML_WRITE	0x00010000
#ifdef CONFIG_FSL_SDHC_V2_3
#define WML_RD_WML_MAX		0x80
#define WML_WR_WML_MAX		0x80
#define WML_RD_WML_MAX_VAL	0x0
#define WML_WR_WML_MAX_VAL	0x0
#define WML_RD_WML_MASK		0x7f
#define WML_WR_WML_MASK		0x7f0000
#else
#define WML_RD_WML_MAX		0x10
#define WML_WR_WML_MAX		0x80
#define WML_RD_WML_MAX_VAL	0x10
#define WML_WR_WML_MAX_VAL	0x80
#define WML_RD_WML_MASK	0xff
#define WML_WR_WML_MASK	0xff0000
#endif

#define BLKATTR		0x2e004
#define BLKATTR_CNT(x)	((x & 0xffff) << 16)
#define BLKATTR_SIZE(x)	(x & 0x1fff)
#define MAX_BLK_CNT	0x7fff	/* so malloc will have enough room with 32M */

#define HOSTCAPBLT_VS18	0x04000000
#define HOSTCAPBLT_VS30	0x02000000
#define HOSTCAPBLT_VS33	0x01000000
#define HOSTCAPBLT_SRS	0x00800000
#define HOSTCAPBLT_DMAS	0x00400000
#define HOSTCAPBLT_HSS	0x00200000

#define ESDHC_VENDORSPEC_VSELECT 0x00000002 /* Use 1.8V */

/* Imported from Linux Kernel drivers/mmc/host/sdhci-esdhc-imx.c */
#define	MIX_CTRL_DDREN		BIT(3)
#define MIX_CTRL_DTDSEL_READ	BIT(4)
#define	MIX_CTRL_AC23EN		BIT(7)
#define	MIX_CTRL_EXE_TUNE	BIT(22)
#define	MIX_CTRL_SMPCLK_SEL	BIT(23)
#define	MIX_CTRL_AUTO_TUNE_EN	BIT(24)
#define	MIX_CTRL_FBCLK_SEL	BIT(25)
#define	MIX_CTRL_HS400_EN	BIT(26)
#define	MIX_CTRL_HS400_ES	BIT(27)
/* Bits 3 and 6 are not SDHCI standard definitions */
#define	MIX_CTRL_SDHCI_MASK	0xb7
/* Tuning bits */
#define	MIX_CTRL_TUNING_MASK	0x03c00000

/* strobe dll register */
#define ESDHC_STROBE_DLL_CTRL		0x70
#define ESDHC_STROBE_DLL_CTRL_ENABLE	BIT(0)
#define ESDHC_STROBE_DLL_CTRL_RESET	BIT(1)
#define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_DEFAULT	0x7
#define ESDHC_STROBE_DLL_CTRL_SLV_DLY_TARGET_SHIFT	3
#define ESDHC_STROBE_DLL_CTRL_SLV_UPDATE_INT_DEFAULT   (4 << 20)

#define ESDHC_STROBE_DLL_STATUS		0x74
#define ESDHC_STROBE_DLL_STS_REF_LOCK	BIT(1)
#define ESDHC_STROBE_DLL_STS_SLV_LOCK	0x1
#define ESDHC_STROBE_DLL_CLK_FREQ	100000000

#define ESDHC_STD_TUNING_EN             BIT(24)
/* NOTE: the minimum valid tuning start tap for mx6sl is 1 */
#define ESDHC_TUNING_START_TAP_DEFAULT	0x1
#define ESDHC_TUNING_START_TAP_MASK	0x7f
#define ESDHC_TUNING_CMD_CRC_CHECK_DISABLE	BIT(7)
#define ESDHC_TUNING_STEP_MASK		0x00070000
#define ESDHC_TUNING_STEP_SHIFT		16

#define	ESDHC_FLAG_MULTIBLK_NO_INT	BIT(1)
#define	ESDHC_FLAG_ENGCM07207		BIT(2)
#define	ESDHC_FLAG_USDHC		BIT(3)
#define	ESDHC_FLAG_MAN_TUNING		BIT(4)
#define	ESDHC_FLAG_STD_TUNING		BIT(5)
#define	ESDHC_FLAG_HAVE_CAP1		BIT(6)
#define	ESDHC_FLAG_ERR004536		BIT(7)
#define	ESDHC_FLAG_HS200		BIT(8)
#define	ESDHC_FLAG_HS400		BIT(9)
#define	ESDHC_FLAG_ERR010450		BIT(10)
#define	ESDHC_FLAG_HS400_ES		BIT(11)

struct fsl_esdhc_cfg {
	phys_addr_t esdhc_base;
	u32	sdhc_clk;
	u8	max_bus_width;
	int	wp_enable;
	int	vs18_enable; /* Use 1.8V if set to 1 */
	struct mmc_config cfg;
};

/* Select the correct accessors depending on endianess */
#if defined CONFIG_SYS_FSL_ESDHC_LE
#define esdhc_read32		in_le32
#define esdhc_write32		out_le32
#define esdhc_clrsetbits32	clrsetbits_le32
#define esdhc_clrbits32		clrbits_le32
#define esdhc_setbits32		setbits_le32
#elif defined(CONFIG_SYS_FSL_ESDHC_BE)
#define esdhc_read32            in_be32
#define esdhc_write32           out_be32
#define esdhc_clrsetbits32      clrsetbits_be32
#define esdhc_clrbits32         clrbits_be32
#define esdhc_setbits32         setbits_be32
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#define esdhc_read32		in_le32
#define esdhc_write32		out_le32
#define esdhc_clrsetbits32	clrsetbits_le32
#define esdhc_clrbits32		clrbits_le32
#define esdhc_setbits32		setbits_le32
#elif __BYTE_ORDER == __BIG_ENDIAN
#define esdhc_read32		in_be32
#define esdhc_write32		out_be32
#define esdhc_clrsetbits32	clrsetbits_be32
#define esdhc_clrbits32		clrbits_be32
#define esdhc_setbits32		setbits_be32
#else
#error "Endianess is not defined: please fix to continue"
#endif

#ifdef CONFIG_FSL_ESDHC_IMX
int fsl_esdhc_mmc_init(struct bd_info *bis);
int fsl_esdhc_initialize(struct bd_info *bis, struct fsl_esdhc_cfg *cfg);
void fdt_fixup_esdhc(void *blob, struct bd_info *bd);
#else
static inline int fsl_esdhc_mmc_init(struct bd_info *bis) { return -ENOSYS; }
static inline void fdt_fixup_esdhc(void *blob, struct bd_info *bd) {}
#endif /* CONFIG_FSL_ESDHC_IMX */
void __noreturn mmc_boot(void);
void mmc_spl_load_image(uint32_t offs, unsigned int size, void *vdst);

#endif  /* __FSL_ESDHC_IMX_H__ */