stdio_dev.h 2.6 KB

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