card.h

/*
 *  linux/include/linux/mmc/card.h
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 *  Card driver specific definitions.
 */
#ifndef LINUX_MMC_CARD_H
#define LINUX_MMC_CARD_H

#include <linux/mmc/core.h>
#include <linux/mod_devicetable.h>

struct mmc_cid {
	unsigned int		manfid;
	char			prod_name[8];
	unsigned int		serial;
	unsigned short		oemid;
	unsigned short		year;
	unsigned char		hwrev;
	unsigned char		fwrev;
	unsigned char		month;
};

struct mmc_csd {
	unsigned char		structure;
	unsigned char		mmca_vsn;
	unsigned short		cmdclass;
	unsigned short		tacc_clks;
	unsigned int		tacc_ns;
	unsigned int		r2w_factor;
	unsigned int		max_dtr;
	unsigned int		erase_size;		/* In sectors */
	unsigned int		read_blkbits;
	unsigned int		write_blkbits;
	unsigned int		capacity;
	unsigned int		read_partial:1,
				read_misalign:1,
				write_partial:1,
				write_misalign:1;
};

struct mmc_ext_csd {
	u8			rev;
	u8			erase_group_def;
	u8			sec_feature_support;
	u8			rel_sectors;
	u8			rel_param;
	u8			part_config;
	unsigned int		part_time;		/* Units: ms */
	unsigned int		sa_timeout;		/* Units: 100ns */
	unsigned int		hs_max_dtr;
	unsigned int		sectors;
	unsigned int		card_type;
	unsigned int		hc_erase_size;		/* In sectors */
	unsigned int		hc_erase_timeout;	/* In milliseconds */
	unsigned int		sec_trim_mult;	/* Secure trim multiplier  */
	unsigned int		sec_erase_mult;	/* Secure erase multiplier */
	unsigned int		trim_timeout;		/* In milliseconds */
	bool			enhanced_area_en;	/* enable bit */
	unsigned long long	enhanced_area_offset;	/* Units: Byte */
	unsigned int		enhanced_area_size;	/* Units: KB */
	unsigned int		boot_size;		/* in bytes */
};

struct sd_scr {
	unsigned char		sda_vsn;
	unsigned char		bus_widths;
#define SD_SCR_BUS_WIDTH_1	(1<<0)
#define SD_SCR_BUS_WIDTH_4	(1<<2)
};

struct sd_ssr {
	unsigned int		au;			/* In sectors */
	unsigned int		erase_timeout;		/* In milliseconds */
	unsigned int		erase_offset;		/* In milliseconds */
};

struct sd_switch_caps {
	unsigned int		hs_max_dtr;
};

struct sdio_cccr {
	unsigned int		sdio_vsn;
	unsigned int		sd_vsn;
	unsigned int		multi_block:1,
				low_speed:1,
				wide_bus:1,
				high_power:1,
				high_speed:1,
				disable_cd:1;
};

struct sdio_cis {
	unsigned short		vendor;
	unsigned short		device;
	unsigned short		blksize;
	unsigned int		max_dtr;
};

struct mmc_host;
struct sdio_func;
struct sdio_func_tuple;

#define SDIO_MAX_FUNCS		7

/*
 * MMC device
 */
struct mmc_card {
	struct mmc_host		*host;		/* the host this device belongs to */
	struct device		dev;		/* the device */
	unsigned int		rca;		/* relative card address of device */
	unsigned int		type;		/* card type */
#define MMC_TYPE_MMC		0		/* MMC card */
#define MMC_TYPE_SD		1		/* SD card */
#define MMC_TYPE_SDIO		2		/* SDIO card */
#define MMC_TYPE_SD_COMBO	3		/* SD combo (IO+mem) card */
	unsigned int		state;		/* (our) card state */
#define MMC_STATE_PRESENT	(1<<0)		/* present in sysfs */
#define MMC_STATE_READONLY	(1<<1)		/* card is read-only */
#define MMC_STATE_HIGHSPEED	(1<<2)		/* card is in high speed mode */
#define MMC_STATE_BLOCKADDR	(1<<3)		/* card uses block-addressing */
#define MMC_STATE_HIGHSPEED_DDR (1<<4)		/* card is in high speed mode */
	unsigned int		quirks; 	/* card quirks */
#define MMC_QUIRK_LENIENT_FN0	(1<<0)		/* allow SDIO FN0 writes outside of the VS CCCR range */
#define MMC_QUIRK_BLKSZ_FOR_BYTE_MODE (1<<1)	/* use func->cur_blksize */
						/* for byte mode */
#define MMC_QUIRK_NONSTD_SDIO	(1<<2)		/* non-standard SDIO card attached */
						/* (missing CIA registers) */
#define MMC_QUIRK_BROKEN_CLK_GATING (1<<3)	/* clock gating the sdio bus will make card fail */
#define MMC_QUIRK_NONSTD_FUNC_IF (1<<4)		/* SDIO card has nonstd function interfaces */
#define MMC_QUIRK_DISABLE_CD	(1<<5)		/* disconnect CD/DAT[3] resistor */

	unsigned int		erase_size;	/* erase size in sectors */
 	unsigned int		erase_shift;	/* if erase unit is power 2 */
 	unsigned int		pref_erase;	/* in sectors */
 	u8			erased_byte;	/* value of erased bytes */

	u32			raw_cid[4];	/* raw card CID */
	u32			raw_csd[4];	/* raw card CSD */
	u32			raw_scr[2];	/* raw card SCR */
	struct mmc_cid		cid;		/* card identification */
	struct mmc_csd		csd;		/* card specific */
	struct mmc_ext_csd	ext_csd;	/* mmc v4 extended card specific */
	struct sd_scr		scr;		/* extra SD information */
	struct sd_ssr		ssr;		/* yet more SD information */
	struct sd_switch_caps	sw_caps;	/* switch (CMD6) caps */

	unsigned int		sdio_funcs;	/* number of SDIO functions */
	struct sdio_cccr	cccr;		/* common card info */
	struct sdio_cis		cis;		/* common tuple info */
	struct sdio_func	*sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */
	unsigned		num_info;	/* number of info strings */
	const char		**info;		/* info strings */
	struct sdio_func_tuple	*tuples;	/* unknown common tuples */

	struct dentry		*debugfs_root;
};

/*
 *  The world is not perfect and supplies us with broken mmc/sdio devices.
 *  For at least some of these bugs we need a work-around.
 */

struct mmc_fixup {
	/* CID-specific fields. */
	const char *name;

	/* Valid revision range */
	u64 rev_start, rev_end;

	unsigned int manfid;
	unsigned short oemid;

	/* SDIO-specfic fields. You can use SDIO_ANY_ID here of course */
	u16 cis_vendor, cis_device;

	void (*vendor_fixup)(struct mmc_card *card, int data);
	int data;
};

#define CID_MANFID_ANY (-1u)
#define CID_OEMID_ANY ((unsigned short) -1)
#define CID_NAME_ANY (NULL)

#define END_FIXUP { 0 }

#define _FIXUP_EXT(_name, _manfid, _oemid, _rev_start, _rev_end,	\
		   _cis_vendor, _cis_device,				\
		   _fixup, _data)					\
	{						   \
		.name = (_name),			   \
		.manfid = (_manfid),			   \
		.oemid = (_oemid),			   \
		.rev_start = (_rev_start),		   \
		.rev_end = (_rev_end),			   \
		.cis_vendor = (_cis_vendor),		   \
		.cis_device = (_cis_device),		   \
		.vendor_fixup = (_fixup),		   \
		.data = (_data),			   \
	 }

#define MMC_FIXUP_REV(_name, _manfid, _oemid, _rev_start, _rev_end,	\
		      _fixup, _data)					\
	_FIXUP_EXT(_name, _manfid,					\
		   _oemid, _rev_start, _rev_end,			\
		   SDIO_ANY_ID, SDIO_ANY_ID,				\
		   _fixup, _data)					\

#define MMC_FIXUP(_name, _manfid, _oemid, _fixup, _data) \
	MMC_FIXUP_REV(_name, _manfid, _oemid, 0, -1ull, _fixup, _data)

#define SDIO_FIXUP(_vendor, _device, _fixup, _data)			\
	_FIXUP_EXT(CID_NAME_ANY, CID_MANFID_ANY,			\
		    CID_OEMID_ANY, 0, -1ull,				\
		   _vendor, _device,					\
		   _fixup, _data)					\

#define cid_rev(hwrev, fwrev, year, month)	\
	(((u64) hwrev) << 40 |                  \
	 ((u64) fwrev) << 32 |                  \
	 ((u64) year) << 16 |                   \
	 ((u64) month))

#define cid_rev_card(card)		  \
	cid_rev(card->cid.hwrev,	  \
		    card->cid.fwrev,      \
		    card->cid.year,	  \
		    card->cid.month)

/*
 * This hook just adds a quirk unconditionally.
 */
static inline void __maybe_unused add_quirk(struct mmc_card *card, int data)
{
	card->quirks |= data;
}

/*
 * This hook just removes a quirk unconditionally.
 */
static inline void __maybe_unused remove_quirk(struct mmc_card *card, int data)
{
	card->quirks &= ~data;
}

#define mmc_card_mmc(c)		((c)->type == MMC_TYPE_MMC)
#define mmc_card_sd(c)		((c)->type == MMC_TYPE_SD)
#define mmc_card_sdio(c)	((c)->type == MMC_TYPE_SDIO)

#define mmc_card_present(c)	((c)->state & MMC_STATE_PRESENT)
#define mmc_card_readonly(c)	((c)->state & MMC_STATE_READONLY)
#define mmc_card_highspeed(c)	((c)->state & MMC_STATE_HIGHSPEED)
#define mmc_card_blockaddr(c)	((c)->state & MMC_STATE_BLOCKADDR)
#define mmc_card_ddr_mode(c)	((c)->state & MMC_STATE_HIGHSPEED_DDR)

#define mmc_card_set_present(c)	((c)->state |= MMC_STATE_PRESENT)
#define mmc_card_set_readonly(c) ((c)->state |= MMC_STATE_READONLY)
#define mmc_card_set_highspeed(c) ((c)->state |= MMC_STATE_HIGHSPEED)
#define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
#define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR)

static inline int mmc_card_lenient_fn0(const struct mmc_card *c)
{
	return c->quirks & MMC_QUIRK_LENIENT_FN0;
}

static inline int mmc_blksz_for_byte_mode(const struct mmc_card *c)
{
	return c->quirks & MMC_QUIRK_BLKSZ_FOR_BYTE_MODE;
}

static inline int mmc_card_disable_cd(const struct mmc_card *c)
{
	return c->quirks & MMC_QUIRK_DISABLE_CD;
}

static inline int mmc_card_nonstd_func_interface(const struct mmc_card *c)
{
	return c->quirks & MMC_QUIRK_NONSTD_FUNC_IF;
}

#define mmc_card_name(c)	((c)->cid.prod_name)
#define mmc_card_id(c)		(dev_name(&(c)->dev))

#define mmc_dev_to_card(d)	container_of(d, struct mmc_card, dev)

#define mmc_list_to_card(l)	container_of(l, struct mmc_card, node)
#define mmc_get_drvdata(c)	dev_get_drvdata(&(c)->dev)
#define mmc_set_drvdata(c,d)	dev_set_drvdata(&(c)->dev, d)

/*
 * MMC device driver (e.g., Flash card, I/O card...)
 */
struct mmc_driver {
	struct device_driver drv;
	int (*probe)(struct mmc_card *);
	void (*remove)(struct mmc_card *);
	int (*suspend)(struct mmc_card *, pm_message_t);
	int (*resume)(struct mmc_card *);
};

extern int mmc_register_driver(struct mmc_driver *);
extern void mmc_unregister_driver(struct mmc_driver *);

extern void mmc_fixup_device(struct mmc_card *card,
			     const struct mmc_fixup *table);

#endif