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 #ifdef CONFIG_CONSOLE_FLUSH_SUPPORT 41 /* To flush output queue */ 42 void (*flush)(struct stdio_dev *dev); 43 #define STDIO_DEV_ASSIGN_FLUSH(dev, flush_func) ((dev)->flush = (flush_func)) 44 #else 45 #define STDIO_DEV_ASSIGN_FLUSH(dev, flush_func) 46 #endif 47 48 /* INPUT functions */ 49 50 /* To test if a char is ready... */ 51 int (*tstc)(struct stdio_dev *dev); 52 int (*getc)(struct stdio_dev *dev); /* To get that char */ 53 54 /* Other functions */ 55 56 void *priv; /* Private extensions */ 57 struct list_head list; 58 }; 59 60 /* 61 * VARIABLES 62 */ 63 extern struct stdio_dev *stdio_devices[]; 64 extern char *stdio_names[MAX_FILES]; 65 66 /* 67 * PROTOTYPES 68 */ 69 int stdio_register(struct stdio_dev *dev); 70 int stdio_register_dev(struct stdio_dev *dev, struct stdio_dev **devp); 71 72 /** 73 * stdio_init_tables() - set up stdio tables ready for devices 74 * 75 * This does not add any devices, but just prepares stdio for use. 76 */ 77 int stdio_init_tables(void); 78 79 /** 80 * stdio_add_devices() - Add stdio devices to the table 81 * 82 * This makes calls to all the various subsystems that use stdio, to make 83 * them register with stdio. 84 */ 85 int stdio_add_devices(void); 86 87 /** 88 * stdio_init() - Sets up stdio ready for use 89 * 90 * This calls stdio_init_tables() and stdio_add_devices() 91 */ 92 int stdio_init(void); 93 94 void stdio_print_current_devices(void); 95 96 /** 97 * stdio_deregister_dev() - deregister the device "devname". 98 * 99 * @dev: Stdio device to deregister 100 * @force: true to force deregistration even if in use 101 * 102 * returns 0 on success, -EBUSY if device is assigned 103 */ 104 int stdio_deregister_dev(struct stdio_dev *dev, int force); 105 struct list_head *stdio_get_list(void); 106 struct stdio_dev *stdio_get_by_name(const char *name); 107 struct stdio_dev *stdio_clone(struct stdio_dev *dev); 108 109 int drv_lcd_init(void); 110 int drv_video_init(void); 111 int drv_keyboard_init(void); 112 int drv_usbtty_init(void); 113 int drv_usbacm_init(void); 114 int drv_nc_init(void); 115 int drv_jtag_console_init(void); 116 int cbmemc_init(void); 117 118 #endif 119