include/linux/mmc/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/device.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		c_size;
	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;
	u8			cache_ctrl;
	u8			rst_n_function;
	u8			max_packed_writes;
	u8			max_packed_reads;
	u8			packed_event_en;
	unsigned int		part_time;		/* Units: ms */
	unsigned int		sa_timeout;		/* Units: 100ns */
	unsigned int		generic_cmd6_time;	/* Units: 10ms */
	unsigned int            power_off_longtime;     /* Units: ms */
	u8			power_off_notification;	/* state */
	unsigned int		hs_max_dtr;
#define MMC_HIGH_26_MAX_DTR	26000000
#define MMC_HIGH_52_MAX_DTR	52000000
#define MMC_HIGH_DDR_MAX_DTR	52000000
#define MMC_HS200_MAX_DTR	200000000
	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		cache_size;		/* Units: KB */
	bool			hpi_en;			/* HPI enablebit */
	bool			hpi;			/* HPI support bit */
	unsigned int		hpi_cmd;		/* cmd used as HPI */
	bool			bkops;		/* background support bit */
	bool			bkops_en;	/* background enable bit */
	unsigned int            data_sector_size;       /* 512 bytes or 4KB */
	unsigned int            data_tag_unit_size;     /* DATA TAG UNIT size */
	unsigned int		boot_ro_lock;		/* ro lock support */
	bool			boot_ro_lockable;
	u8			raw_exception_status;	/* 53 */
	u8			raw_partition_support;	/* 160 */
	u8			raw_erased_mem_count;	/* 181 */
	u8			raw_ext_csd_structure;	/* 194 */
	u8			raw_card_type;		/* 196 */
	u8			out_of_int_time;	/* 198 */
	u8			raw_s_a_timeout;		/* 217 */
	u8			raw_hc_erase_gap_size;	/* 221 */
	u8			raw_erase_timeout_mult;	/* 223 */
	u8			raw_hc_erase_grp_size;	/* 224 */
	u8			raw_sec_trim_mult;	/* 229 */
	u8			raw_sec_erase_mult;	/* 230 */
	u8			raw_sec_feature_support;/* 231 */
	u8			raw_trim_mult;		/* 232 */
	u8			raw_bkops_status;	/* 246 */
	u8			raw_sectors[4];		/* 212 - 4 bytes */

	unsigned int            feature_support;
#define MMC_DISCARD_FEATURE	BIT(0)                  /* CMD38 feature */
};

struct sd_scr {
	unsigned char		sda_vsn;
	unsigned char		sda_spec3;
	unsigned char		bus_widths;
#define SD_SCR_BUS_WIDTH_1	(1<<0)
#define SD_SCR_BUS_WIDTH_4	(1<<2)
	unsigned char		cmds;
#define SD_SCR_CMD20_SUPPORT   (1<<0)
#define SD_SCR_CMD23_SUPPORT   (1<<1)
};

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;
	unsigned int		uhs_max_dtr;
#define HIGH_SPEED_MAX_DTR	50000000
#define UHS_SDR104_MAX_DTR	208000000
#define UHS_SDR50_MAX_DTR	100000000
#define UHS_DDR50_MAX_DTR	50000000
#define UHS_SDR25_MAX_DTR	UHS_DDR50_MAX_DTR
#define UHS_SDR12_MAX_DTR	25000000
	unsigned int		sd3_bus_mode;
#define UHS_SDR12_BUS_SPEED	0
#define HIGH_SPEED_BUS_SPEED	1
#define UHS_SDR25_BUS_SPEED	1
#define UHS_SDR50_BUS_SPEED	2
#define UHS_SDR104_BUS_SPEED	3
#define UHS_DDR50_BUS_SPEED	4

#define SD_MODE_HIGH_SPEED	(1 << HIGH_SPEED_BUS_SPEED)
#define SD_MODE_UHS_SDR12	(1 << UHS_SDR12_BUS_SPEED)
#define SD_MODE_UHS_SDR25	(1 << UHS_SDR25_BUS_SPEED)
#define SD_MODE_UHS_SDR50	(1 << UHS_SDR50_BUS_SPEED)
#define SD_MODE_UHS_SDR104	(1 << UHS_SDR104_BUS_SPEED)
#define SD_MODE_UHS_DDR50	(1 << UHS_DDR50_BUS_SPEED)
	unsigned int		sd3_drv_type;
#define SD_DRIVER_TYPE_B	0x01
#define SD_DRIVER_TYPE_A	0x02
#define SD_DRIVER_TYPE_C	0x04
#define SD_DRIVER_TYPE_D	0x08
	unsigned int		sd3_curr_limit;
#define SD_SET_CURRENT_LIMIT_200	0
#define SD_SET_CURRENT_LIMIT_400	1
#define SD_SET_CURRENT_LIMIT_600	2
#define SD_SET_CURRENT_LIMIT_800	3

#define SD_MAX_CURRENT_200	(1 << SD_SET_CURRENT_LIMIT_200)
#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)
};

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

enum mmc_packed_stop_reasons {
	EXCEEDS_SEGMENTS = 0,
	EXCEEDS_SECTORS,
	WRONG_DATA_DIR,
	FLUSH_OR_DISCARD,
	EMPTY_QUEUE,
	REL_WRITE,
	THRESHOLD,
	LARGE_SEC_ALIGN,
	MAX_REASONS,
};

struct mmc_wr_pack_stats {
	u32 *packing_events;
	u32 pack_stop_reason[MAX_REASONS];
	spinlock_t lock;
	bool enabled;
	bool print_in_read;
};

/* The number of MMC physical partitions.  These consist of:
 * boot partitions (2), general purpose partitions (4) in MMC v4.4.
 */
#define MMC_NUM_BOOT_PARTITION	2
#define MMC_NUM_GP_PARTITION	4
#define MMC_NUM_PHY_PARTITION	6
#define MAX_MMC_PART_NAME_LEN	20

/*
 * MMC Physical partitions
 */
struct mmc_part {
	unsigned int	size;	/* partition size (in bytes) */
	unsigned int	part_cfg;	/* partition type */
	char	name[MAX_MMC_PART_NAME_LEN];
	bool	force_ro;	/* to make boot parts RO by default */
	unsigned int	area_type;
#define MMC_BLK_DATA_AREA_MAIN	(1<<0)
#define MMC_BLK_DATA_AREA_BOOT	(1<<1)
#define MMC_BLK_DATA_AREA_GP	(1<<2)
};

/**
 * struct mmc_bkops_info - BKOPS data
 * @dw:	Idle time bkops delayed work
 * @host_suspend_tout_ms:	The host controller idle time,
 * before getting into suspend
 * @delay_ms:	The time to start the BKOPS
 *        delayed work once MMC thread is idle
 * @poll_for_completion:	Poll on BKOPS completion
 * @cancel_delayed_work: A flag to indicate if the delayed work
 *        should be cancelled
 * @started_delayed_bkops:  A flag to indicate if the delayed
 *        work was scheduled
 * @sectors_changed:  number of  sectors written or
 *       discard since the last idle BKOPS were scheduled
 */
struct mmc_bkops_info {
	struct delayed_work	dw;
	unsigned int		host_suspend_tout_ms;
	unsigned int		delay_ms;
	unsigned int		min_sectors_to_queue_delayed_work;
/*
 * A default time for checking the need for non urgent BKOPS once mmcqd
 * is idle.
 */
#define MMC_IDLE_BKOPS_TIME_MS 2000
	struct work_struct	poll_for_completion;
/* Polling timeout and interval for waiting on non-blocking BKOPs completion */
#define BKOPS_COMPLETION_POLLING_TIMEOUT_MS 10000 /* in ms */
#define BKOPS_COMPLETION_POLLING_INTERVAL_MS 1000 /* in ms */
	bool			cancel_delayed_work;
	bool			started_delayed_bkops;
	unsigned int		sectors_changed;
/*
 * Since canceling the delayed work might have significant effect on the
 * performance of small requests we won't queue the delayed work every time
 * mmcqd thread is idle.
 * The delayed work for idle BKOPS will be scheduled only after a significant
 * amount of write or discard data.
 * 100MB is chosen based on benchmark tests.
 */
#define BKOPS_MIN_SECTORS_TO_QUEUE_DELAYED_WORK 204800 /* 100MB */
};

/*
 * 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 */
#define MMC_STATE_ULTRAHIGHSPEED (1<<5)		/* card is in ultra high speed mode */
#define MMC_CARD_SDXC		(1<<6)		/* card is SDXC */
#define MMC_CARD_REMOVED	(1<<7)		/* card has been removed */
#define MMC_STATE_HIGHSPEED_200	(1<<8)		/* card is in HS200 mode */
#define MMC_STATE_DOING_BKOPS	(1<<10)		/* card is doing BKOPS */
	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 */
#define MMC_QUIRK_INAND_CMD38	(1<<6)		/* iNAND devices have broken CMD38 */
#define MMC_QUIRK_BLK_NO_CMD23	(1<<7)		/* Avoid CMD23 for regular multiblock */
#define MMC_QUIRK_BROKEN_BYTE_MODE_512 (1<<8)	/* Avoid sending 512 bytes in */
#define MMC_QUIRK_LONG_READ_TIME (1<<9)		/* Data read time > CSD says */
						/* byte mode */
#define MMC_QUIRK_INAND_DATA_TIMEOUT  (1<<8)    /* For incorrect data timeout */

	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) */
	struct sdio_func	*sdio_single_irq; /* SDIO function when only one IRQ active */
	unsigned		num_info;	/* number of info strings */
	const char		**info;		/* info strings */
	struct sdio_func_tuple	*tuples;	/* unknown common tuples */

	unsigned int		sd_bus_speed;	/* Bus Speed Mode set for the card */

	struct dentry		*debugfs_root;
	struct mmc_part	part[MMC_NUM_PHY_PARTITION]; /* physical partitions */
	unsigned int    nr_parts;

	struct mmc_wr_pack_stats wr_pack_stats; /* packed commands stats*/

	struct mmc_bkops_info	bkops_info;
};

/*
 * This function fill contents in mmc_part.
 */
static inline void mmc_part_add(struct mmc_card *card, unsigned int size,
			unsigned int part_cfg, char *name, int idx, bool ro,
			int area_type)
{
	card->part[card->nr_parts].size = size;
	card->part[card->nr_parts].part_cfg = part_cfg;
	sprintf(card->part[card->nr_parts].name, name, idx);
	card->part[card->nr_parts].force_ro = ro;
	card->part[card->nr_parts].area_type = area_type;
	card->nr_parts++;
}

static inline bool mmc_large_sec(struct mmc_card *card)
{
	return card->ext_csd.data_sector_size == 4096;
}

/*
 *  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)

/*
 * Unconditionally quirk add/remove.
 */

static inline void __maybe_unused add_quirk(struct mmc_card *card, int data)
{
	card->quirks |= data;
}

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_hs200(c)	((c)->state & MMC_STATE_HIGHSPEED_200)
#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_uhs(c)		((c)->state & MMC_STATE_ULTRAHIGHSPEED)
#define mmc_sd_card_uhs(c)	((c)->state & MMC_STATE_ULTRAHIGHSPEED)
#define mmc_card_ext_capacity(c) ((c)->state & MMC_CARD_SDXC)
#define mmc_card_removed(c)	((c) && ((c)->state & MMC_CARD_REMOVED))
#define mmc_card_doing_bkops(c)	((c)->state & MMC_STATE_DOING_BKOPS)

#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_hs200(c)	((c)->state |= MMC_STATE_HIGHSPEED_200)
#define mmc_card_set_blockaddr(c) ((c)->state |= MMC_STATE_BLOCKADDR)
#define mmc_card_set_ddr_mode(c) ((c)->state |= MMC_STATE_HIGHSPEED_DDR)
#define mmc_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
#define mmc_sd_card_set_uhs(c) ((c)->state |= MMC_STATE_ULTRAHIGHSPEED)
#define mmc_card_set_ext_capacity(c) ((c)->state |= MMC_CARD_SDXC)
#define mmc_card_set_removed(c) ((c)->state |= MMC_CARD_REMOVED)
#define mmc_card_set_doing_bkops(c)	((c)->state |= MMC_STATE_DOING_BKOPS)
#define mmc_card_clr_doing_bkops(c)	((c)->state &= ~MMC_STATE_DOING_BKOPS)

/*
 * Quirk add/remove for MMC products.
 */

static inline void __maybe_unused add_quirk_mmc(struct mmc_card *card, int data)
{
	if (mmc_card_mmc(card))
		card->quirks |= data;
}

static inline void __maybe_unused remove_quirk_mmc(struct mmc_card *card,
						   int data)
{
	if (mmc_card_mmc(card))
		card->quirks &= ~data;
}

/*
 * Quirk add/remove for SD products.
 */

static inline void __maybe_unused add_quirk_sd(struct mmc_card *card, int data)
{
	if (mmc_card_sd(card))
		card->quirks |= data;
}

static inline void __maybe_unused remove_quirk_sd(struct mmc_card *card,
						   int data)
{
	if (mmc_card_sd(card))
		card->quirks &= ~data;
}

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;
}

static inline int mmc_card_broken_byte_mode_512(const struct mmc_card *c)
{
	return c->quirks & MMC_QUIRK_BROKEN_BYTE_MODE_512;
}

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

#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 *);
	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);
extern struct mmc_wr_pack_stats *mmc_blk_get_packed_statistics(
			struct mmc_card *card);
extern void mmc_blk_init_packed_statistics(struct mmc_card *card);

#endif /* LINUX_MMC_CARD_H */