xref: /linux-6.15/include/linux/mmc/sdio_func.h (revision b4c9f938)

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 *  include/linux/mmc/sdio_func.h
 *
 *  Copyright 2007-2008 Pierre Ossman
 */

#ifndef LINUX_MMC_SDIO_FUNC_H
#define LINUX_MMC_SDIO_FUNC_H

#include <linux/device.h>
#include <linux/mod_devicetable.h>

#include <linux/mmc/pm.h>

struct mmc_card;
struct sdio_func;

typedef void (sdio_irq_handler_t)(struct sdio_func *);

/*
 * SDIO function CIS tuple (unknown to the core)
 */
struct sdio_func_tuple {
	struct sdio_func_tuple *next;
	unsigned char code;
	unsigned char size;
	unsigned char data[0];
};

/*
 * SDIO function devices
 */
struct sdio_func {
	struct mmc_card		*card;		/* the card this device belongs to */
	struct device		dev;		/* the device */
	sdio_irq_handler_t	*irq_handler;	/* IRQ callback */
	unsigned int		num;		/* function number */

	unsigned char		class;		/* standard interface class */
	unsigned short		vendor;		/* vendor id */
	unsigned short		device;		/* device id */

	unsigned		max_blksize;	/* maximum block size */
	unsigned		cur_blksize;	/* current block size */

	unsigned		enable_timeout;	/* max enable timeout in msec */

	unsigned int		state;		/* function state */
#define SDIO_STATE_PRESENT	(1<<0)		/* present in sysfs */

	u8			*tmpbuf;	/* DMA:able scratch buffer */

	unsigned		num_info;	/* number of info strings */
	const char		**info;		/* info strings */

	struct sdio_func_tuple *tuples;
};

#define sdio_func_present(f)	((f)->state & SDIO_STATE_PRESENT)

#define sdio_func_set_present(f) ((f)->state |= SDIO_STATE_PRESENT)

#define sdio_func_id(f)		(dev_name(&(f)->dev))

#define sdio_get_drvdata(f)	dev_get_drvdata(&(f)->dev)
#define sdio_set_drvdata(f,d)	dev_set_drvdata(&(f)->dev, d)
#define dev_to_sdio_func(d)	container_of(d, struct sdio_func, dev)

/*
 * SDIO function device driver
 */
struct sdio_driver {
	char *name;
	const struct sdio_device_id *id_table;

	int (*probe)(struct sdio_func *, const struct sdio_device_id *);
	void (*remove)(struct sdio_func *);

	struct device_driver drv;
};

/**
 * SDIO_DEVICE - macro used to describe a specific SDIO device
 * @vend: the 16 bit manufacturer code
 * @dev: the 16 bit function id
 *
 * This macro is used to create a struct sdio_device_id that matches a
 * specific device. The class field will be set to SDIO_ANY_ID.
 */
#define SDIO_DEVICE(vend,dev) \
	.class = SDIO_ANY_ID, \
	.vendor = (vend), .device = (dev)

/**
 * SDIO_DEVICE_CLASS - macro used to describe a specific SDIO device class
 * @dev_class: the 8 bit standard interface code
 *
 * This macro is used to create a struct sdio_device_id that matches a
 * specific standard SDIO function type.  The vendor and device fields will
 * be set to SDIO_ANY_ID.
 */
#define SDIO_DEVICE_CLASS(dev_class) \
	.class = (dev_class), \
	.vendor = SDIO_ANY_ID, .device = SDIO_ANY_ID

extern int sdio_register_driver(struct sdio_driver *);
extern void sdio_unregister_driver(struct sdio_driver *);

/**
 * module_sdio_driver() - Helper macro for registering a SDIO driver
 * @__sdio_driver: sdio_driver struct
 *
 * Helper macro for SDIO drivers which do not do anything special in module
 * init/exit. This eliminates a lot of boilerplate. Each module may only
 * use this macro once, and calling it replaces module_init() and module_exit()
 */
#define module_sdio_driver(__sdio_driver) \
	module_driver(__sdio_driver, sdio_register_driver, \
		      sdio_unregister_driver)

/*
 * SDIO I/O operations
 */
extern void sdio_claim_host(struct sdio_func *func);
extern void sdio_release_host(struct sdio_func *func);

extern int sdio_enable_func(struct sdio_func *func);
extern int sdio_disable_func(struct sdio_func *func);

extern int sdio_set_block_size(struct sdio_func *func, unsigned blksz);

extern int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler);
extern int sdio_release_irq(struct sdio_func *func);

extern unsigned int sdio_align_size(struct sdio_func *func, unsigned int sz);

extern u8 sdio_readb(struct sdio_func *func, unsigned int addr, int *err_ret);
extern u16 sdio_readw(struct sdio_func *func, unsigned int addr, int *err_ret);
extern u32 sdio_readl(struct sdio_func *func, unsigned int addr, int *err_ret);

extern int sdio_memcpy_fromio(struct sdio_func *func, void *dst,
	unsigned int addr, int count);
extern int sdio_readsb(struct sdio_func *func, void *dst,
	unsigned int addr, int count);

extern void sdio_writeb(struct sdio_func *func, u8 b,
	unsigned int addr, int *err_ret);
extern void sdio_writew(struct sdio_func *func, u16 b,
	unsigned int addr, int *err_ret);
extern void sdio_writel(struct sdio_func *func, u32 b,
	unsigned int addr, int *err_ret);

extern u8 sdio_writeb_readb(struct sdio_func *func, u8 write_byte,
	unsigned int addr, int *err_ret);

extern int sdio_memcpy_toio(struct sdio_func *func, unsigned int addr,
	void *src, int count);
extern int sdio_writesb(struct sdio_func *func, unsigned int addr,
	void *src, int count);

extern unsigned char sdio_f0_readb(struct sdio_func *func,
	unsigned int addr, int *err_ret);
extern void sdio_f0_writeb(struct sdio_func *func, unsigned char b,
	unsigned int addr, int *err_ret);

extern mmc_pm_flag_t sdio_get_host_pm_caps(struct sdio_func *func);
extern int sdio_set_host_pm_flags(struct sdio_func *func, mmc_pm_flag_t flags);

extern void sdio_retune_crc_disable(struct sdio_func *func);
extern void sdio_retune_crc_enable(struct sdio_func *func);

extern void sdio_retune_hold_now(struct sdio_func *func);
extern void sdio_retune_release(struct sdio_func *func);

#endif /* LINUX_MMC_SDIO_FUNC_H */