include/stdio_dev.h

/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * (C) Copyright 2000
 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
 */

#ifndef _STDIO_DEV_H_
#define _STDIO_DEV_H_

#include <stdio.h>
#include <linux/list.h>

/*
 * STDIO DEVICES
 */

#define DEV_FLAGS_INPUT	 0x00000001	/* Device can be used as input	console */
#define DEV_FLAGS_OUTPUT 0x00000002	/* Device can be used as output console */
#define DEV_FLAGS_DM     0x00000004	/* Device priv is a struct udevice * */

/* Device information */
struct stdio_dev {
	int	flags;			/* Device flags: input/output/system	*/
	int	ext;			/* Supported extensions			*/
	char	name[32];		/* Device name				*/

/* GENERAL functions */

	int (*start)(struct stdio_dev *dev);	/* To start the device */
	int (*stop)(struct stdio_dev *dev);	/* To stop the device */

/* OUTPUT functions */

	/* To put a char */
	void (*putc)(struct stdio_dev *dev, const char c);
	/* To put a string (accelerator) */
	void (*puts)(struct stdio_dev *dev, const char *s);

/* INPUT functions */

	/* To test if a char is ready... */
	int (*tstc)(struct stdio_dev *dev);
	int (*getc)(struct stdio_dev *dev);	/* To get that char */

/* Other functions */

	void *priv;			/* Private extensions			*/
	struct list_head list;
};

/*
 * VARIABLES
 */
extern struct stdio_dev *stdio_devices[];
extern char *stdio_names[MAX_FILES];

/*
 * PROTOTYPES
 */
int stdio_register(struct stdio_dev *dev);
int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);

/**
 * stdio_init_tables() - set up stdio tables ready for devices
 *
 * This does not add any devices, but just prepares stdio for use.
 */
int stdio_init_tables(void);

/**
 * stdio_add_devices() - Add stdio devices to the table
 *
 * This makes calls to all the various subsystems that use stdio, to make
 * them register with stdio.
 */
int stdio_add_devices(void);

/**
 * stdio_init() - Sets up stdio ready for use
 *
 * This calls stdio_init_tables() and stdio_add_devices()
 */
int stdio_init(void);

void stdio_print_current_devices(void);
int stdio_deregister(const char *devname, int force);

/**
 * stdio_deregister_dev() - deregister the device "devname".
 *
 * @dev: Stdio device to deregister
 * @force: true to force deregistration even if in use
 *
 * returns 0 on success, -EBUSY if device is assigned
 */
int stdio_deregister_dev(struct stdio_dev *dev, int force);
struct list_head *stdio_get_list(void);
struct stdio_dev *stdio_get_by_name(const char *name);
struct stdio_dev *stdio_clone(struct stdio_dev *dev);

int drv_lcd_init(void);
int drv_video_init(void);
int drv_keyboard_init(void);
int drv_usbtty_init(void);
int drv_nc_init(void);
int drv_jtag_console_init(void);
int cbmemc_init(void);

#endif