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 #define STDIO_NAME_LEN 32
  21
  22 int stdio_file_to_flags(const int file);
  23
  24 /* Device information */
  25 struct 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  */
  64 extern struct stdio_dev *stdio_devices[];
  65 extern char *stdio_names[MAX_FILES];
  66
  67 /*
  68  * PROTOTYPES
  69  */
  70 int stdio_register(struct stdio_dev *dev);
  71 int 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  */
  78 int 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  */
  86 int 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  */
  96 int stdio_deregister_dev(struct stdio_dev *dev, int force);
  97 struct list_head *stdio_get_list(void);
  98 struct stdio_dev *stdio_get_by_name(const char *name);
  99 struct stdio_dev *stdio_clone(struct stdio_dev *dev);
 100
 101 int drv_lcd_init(void);
 102 int drv_video_init(void);
 103 int drv_keyboard_init(void);
 104 int drv_usbtty_init(void);
 105 int drv_usbacm_init(void);
 106 int drv_nc_init(void);
 107 int drv_jtag_console_init(void);
 108 int cbmemc_init(void);
 109
 110 #endif