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_usbacm_init(void); 105 int drv_nc_init(void); 106 int drv_jtag_console_init(void); 107 int cbmemc_init(void); 108 109 #endif 110