include/stdio_dev.h

   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 /* Device information */
  22 struct stdio_dev {
  23         int     flags;                  /* Device flags: input/output/system    */
  24         int     ext;                    /* Supported extensions                 */
  25         char    name[32];               /* Device name                          */
  26
  27 /* GENERAL functions */
  28
  29         int (*start)(struct stdio_dev *dev);    /* To start the device */
  30         int (*stop)(struct stdio_dev *dev);     /* To stop the device */
  31
  32 /* OUTPUT functions */
  33
  34         /* To put a char */
  35         void (*putc)(struct stdio_dev *dev, const char c);
  36         /* To put a string (accelerator) */
  37         void (*puts)(struct stdio_dev *dev, const char *s);
  38
  39 /* INPUT functions */
  40
  41         /* To test if a char is ready... */
  42         int (*tstc)(struct stdio_dev *dev);
  43         int (*getc)(struct stdio_dev *dev);     /* To get that char */
  44
  45 /* Other functions */
  46
  47         void *priv;                     /* Private extensions                   */
  48         struct list_head list;
  49 };
  50
  51 /*
  52  * VARIABLES
  53  */
  54 extern struct stdio_dev *stdio_devices[];
  55 extern char *stdio_names[MAX_FILES];
  56
  57 /*
  58  * PROTOTYPES
  59  */
  60 int     stdio_register (struct stdio_dev * dev);
  61 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp);
  62
  63 /**
  64  * stdio_init_tables() - set up stdio tables ready for devices
  65  *
  66  * This does not add any devices, but just prepares stdio for use.
  67  */
  68 int stdio_init_tables(void);
  69
  70 /**
  71  * stdio_add_devices() - Add stdio devices to the table
  72  *
  73  * This makes calls to all the various subsystems that use stdio, to make
  74  * them register with stdio.
  75  */
  76 int stdio_add_devices(void);
  77
  78 /**
  79  * stdio_init() - Sets up stdio ready for use
  80  *
  81  * This calls stdio_init_tables() and stdio_add_devices()
  82  */
  83 int stdio_init(void);
  84
  85 void    stdio_print_current_devices(void);
  86 #if CONFIG_IS_ENABLED(SYS_STDIO_DEREGISTER)
  87 int stdio_deregister(const char *devname, int force);
  88 int stdio_deregister_dev(struct stdio_dev *dev, int force);
  89 #endif
  90 struct list_head* stdio_get_list(void);
  91 struct stdio_dev* stdio_get_by_name(const char* name);
  92 struct stdio_dev* stdio_clone(struct stdio_dev *dev);
  93
  94 #ifdef CONFIG_LCD
  95 int     drv_lcd_init (void);
  96 #endif
  97 #if defined(CONFIG_VIDEO) || defined(CONFIG_CFB_CONSOLE)
  98 int     drv_video_init (void);
  99 #endif
 100 #ifdef CONFIG_KEYBOARD
 101 int     drv_keyboard_init (void);
 102 #endif
 103 #ifdef CONFIG_USB_TTY
 104 int     drv_usbtty_init (void);
 105 #endif
 106 #ifdef CONFIG_NETCONSOLE
 107 int     drv_nc_init (void);
 108 #endif
 109 #ifdef CONFIG_JTAG_CONSOLE
 110 int drv_jtag_console_init (void);
 111 #endif
 112 #ifdef CONFIG_CBMEM_CONSOLE
 113 int cbmemc_init(void);
 114 #endif
 115
 116 #endif