1/* SPDX-License-Identifier: GPL-2.0+ */ 2/* 3 * (C) Copyright 2000 4 * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it 5 */ 6 7#ifndef _STDIO_DEV_H_ 8#define _STDIO_DEV_H_ 9 10#include <stdio.h> 11#include <linux/list.h> 12 13/* 14 * STDIO DEVICES 15 */ 16 17#define DEV_FLAGS_INPUT 0x00000001 /* Device can be used as input console */ 18#define DEV_FLAGS_OUTPUT 0x00000002 /* Device can be used as output console */ 19#define DEV_FLAGS_DM 0x00000004 /* Device priv is a struct udevice * */ 20 21int stdio_file_to_flags(const int file); 22 23/* Device information */ 24struct stdio_dev { 25 int flags; /* Device flags: input/output/system */ 26 int ext; /* Supported extensions */ 27 char name[32]; /* Device name */ 28 29/* GENERAL functions */ 30 31 int (*start)(struct stdio_dev *dev); /* To start the device */ 32 int (*stop)(struct stdio_dev *dev); /* To stop the device */ 33 34/* OUTPUT functions */ 35 36 /* To put a char */ 37 void (*putc)(struct stdio_dev *dev, const char c); 38 /* To put a string (accelerator) */ 39 void (*puts)(struct stdio_dev *dev, const char *s); 40 41/* INPUT functions */ 42 43 /* To test if a char is ready... */ 44 int (*tstc)(struct stdio_dev *dev); 45 int (*getc)(struct stdio_dev *dev); /* To get that char */ 46 47/* Other functions */ 48 49 void *priv; /* Private extensions */ 50 struct list_head list; 51}; 52 53/* 54 * VARIABLES 55 */ 56extern struct stdio_dev *stdio_devices[]; 57extern char *stdio_names[MAX_FILES]; 58 59/* 60 * PROTOTYPES 61 */ 62int stdio_register(struct stdio_dev *dev); 63int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp); 64 65/** 66 * stdio_init_tables() - set up stdio tables ready for devices 67 * 68 * This does not add any devices, but just prepares stdio for use. 69 */ 70int stdio_init_tables(void); 71 72/** 73 * stdio_add_devices() - Add stdio devices to the table 74 * 75 * This makes calls to all the various subsystems that use stdio, to make 76 * them register with stdio. 77 */ 78int stdio_add_devices(void); 79 80/** 81 * stdio_init() - Sets up stdio ready for use 82 * 83 * This calls stdio_init_tables() and stdio_add_devices() 84 */ 85int stdio_init(void); 86 87void stdio_print_current_devices(void); 88 89/** 90 * stdio_deregister_dev() - deregister the device "devname". 91 * 92 * @dev: Stdio device to deregister 93 * @force: true to force deregistration even if in use 94 * 95 * returns 0 on success, -EBUSY if device is assigned 96 */ 97int stdio_deregister_dev(struct stdio_dev *dev, int force); 98struct list_head *stdio_get_list(void); 99struct stdio_dev *stdio_get_by_name(const char *name); 100struct stdio_dev *stdio_clone(struct stdio_dev *dev); 101 102int drv_lcd_init(void); 103int drv_video_init(void); 104int drv_keyboard_init(void); 105int drv_usbtty_init(void); 106int drv_nc_init(void); 107int drv_jtag_console_init(void); 108int cbmemc_init(void); 109 110#endif 111