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 
21 int stdio_file_to_flags(const int file);
22 
23 /* Device information */
24 struct 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  */
56 extern struct stdio_dev *stdio_devices[];
57 extern char *stdio_names[MAX_FILES];
58 
59 /*
60  * PROTOTYPES
61  */
62 int stdio_register(struct stdio_dev *dev);
63 int 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  */
70 int 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  */
78 int 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  */
85 int stdio_init(void);
86 
87 void 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  */
97 int stdio_deregister_dev(struct stdio_dev *dev, int force);
98 struct list_head *stdio_get_list(void);
99 struct stdio_dev *stdio_get_by_name(const char *name);
100 struct stdio_dev *stdio_clone(struct stdio_dev *dev);
101 
102 int drv_lcd_init(void);
103 int drv_video_init(void);
104 int drv_keyboard_init(void);
105 int drv_usbtty_init(void);
106 int drv_nc_init(void);
107 int drv_jtag_console_init(void);
108 int cbmemc_init(void);
109 
110 #endif
111