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"Das U-Boot" Source Tree
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#define STDIO_NAME_LEN 32
21
22int stdio_file_to_flags(const int file);
23
24/* Device information */
25struct stdio_dev {
26 int flags; /* Device flags: input/output/system */
27 int ext; /* Supported extensions */
28 char name[STDIO_NAME_LEN]; /* Device name */
29
30/* GENERAL functions */
31
32 int (*start)(struct stdio_dev *dev); /* To start the device */
33 int (*stop)(struct stdio_dev *dev); /* To stop the device */
34
35/* OUTPUT functions */
36
37 /* To put a char */
38 void (*putc)(struct stdio_dev *dev, const char c);
39 /* To put a string (accelerator) */
40 void (*puts)(struct stdio_dev *dev, const char *s);
41#ifdef CONFIG_CONSOLE_FLUSH_SUPPORT
42 /* To flush output queue */
43 void (*flush)(struct stdio_dev *dev);
44#define STDIO_DEV_ASSIGN_FLUSH(dev, flush_func) ((dev)->flush = (flush_func))
45#else
46#define STDIO_DEV_ASSIGN_FLUSH(dev, flush_func)
47#endif
48
49/* INPUT functions */
50
51 /* To test if a char is ready... */
52 int (*tstc)(struct stdio_dev *dev);
53 int (*getc)(struct stdio_dev *dev); /* To get that char */
54
55/* Other functions */
56
57 void *priv; /* Private extensions */
58 struct list_head list;
59};
60
61/*
62 * VARIABLES
63 */
64extern struct stdio_dev *stdio_devices[];
65extern char *stdio_names[MAX_FILES];
66
67/*
68 * PROTOTYPES
69 */
70int stdio_register(struct stdio_dev *dev);
71int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
72
73/**
74 * stdio_init_tables() - set up stdio tables ready for devices
75 *
76 * This does not add any devices, but just prepares stdio for use.
77 */
78int stdio_init_tables(void);
79
80/**
81 * stdio_add_devices() - Add stdio devices to the table
82 *
83 * This makes calls to all the various subsystems that use stdio, to make
84 * them register with stdio.
85 */
86int stdio_add_devices(void);
87
88/**
89 * stdio_deregister_dev() - deregister the device "devname".
90 *
91 * @dev: Stdio device to deregister
92 * @force: true to force deregistration even if in use
93 *
94 * returns 0 on success, -EBUSY if device is assigned
95 */
96int stdio_deregister_dev(struct stdio_dev *dev, int force);
97struct list_head *stdio_get_list(void);
98struct stdio_dev *stdio_get_by_name(const char *name);
99struct stdio_dev *stdio_clone(struct stdio_dev *dev);
100
101int drv_lcd_init(void);
102int drv_video_init(void);
103int drv_keyboard_init(void);
104int drv_usbacm_init(void);
105int drv_nc_init(void);
106int drv_jtag_console_init(void);
107int cbmemc_init(void);
108
109#endif