1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_MISCDEVICE_H
3#define _LINUX_MISCDEVICE_H
4#include <linux/major.h>
5#include <linux/list.h>
6#include <linux/types.h>
7#include <linux/device.h>
8
9/*
10 * These allocations are managed by device@lanana.org. If you need
11 * an entry that is not assigned here, it can be moved and
12 * reassigned or dynamically set if a fixed value is not justified.
13 */
14
15#define PSMOUSE_MINOR 1
16#define MS_BUSMOUSE_MINOR 2 /* unused */
17#define ATIXL_BUSMOUSE_MINOR 3 /* unused */
18/*#define AMIGAMOUSE_MINOR 4 FIXME OBSOLETE */
19#define ATARIMOUSE_MINOR 5 /* unused */
20#define SUN_MOUSE_MINOR 6 /* unused */
21#define APOLLO_MOUSE_MINOR 7 /* unused */
22#define PC110PAD_MINOR 9 /* unused */
23/*#define ADB_MOUSE_MINOR 10 FIXME OBSOLETE */
24#define WATCHDOG_MINOR 130 /* Watchdog timer */
25#define TEMP_MINOR 131 /* Temperature Sensor */
26#define APM_MINOR_DEV 134
27#define RTC_MINOR 135
28/*#define EFI_RTC_MINOR 136 was EFI Time services */
29#define VHCI_MINOR 137
30#define SUN_OPENPROM_MINOR 139
31#define DMAPI_MINOR 140 /* unused */
32#define NVRAM_MINOR 144
33#define SBUS_FLASH_MINOR 152
34#define SGI_MMTIMER 153
35#define PMU_MINOR 154
36#define STORE_QUEUE_MINOR 155 /* unused */
37#define LCD_MINOR 156
38#define AC_MINOR 157
39#define BUTTON_MINOR 158 /* Major 10, Minor 158, /dev/nwbutton */
40#define NWFLASH_MINOR 160 /* MAJOR is 10 - miscdevice */
41#define ENVCTRL_MINOR 162
42#define I2O_MINOR 166
43#define UCTRL_MINOR 174
44#define AGPGART_MINOR 175
45#define TOSH_MINOR_DEV 181
46#define HWRNG_MINOR 183
47/*#define MICROCODE_MINOR 184 unused */
48#define KEYPAD_MINOR 185
49#define IRNET_MINOR 187
50#define D7S_MINOR 193
51#define VFIO_MINOR 196
52#define PXA3XX_GCU_MINOR 197
53#define TUN_MINOR 200
54#define CUSE_MINOR 203
55#define MWAVE_MINOR 219 /* ACP/Mwave Modem */
56#define MPT_MINOR 220
57#define MPT2SAS_MINOR 221
58#define MPT3SAS_MINOR 222
59#define UINPUT_MINOR 223
60#define MISC_MCELOG_MINOR 227
61#define HPET_MINOR 228
62#define FUSE_MINOR 229
63#define SNAPSHOT_MINOR 231
64#define KVM_MINOR 232
65#define BTRFS_MINOR 234
66#define AUTOFS_MINOR 235
67#define MAPPER_CTRL_MINOR 236
68#define LOOP_CTRL_MINOR 237
69#define VHOST_NET_MINOR 238
70#define UHID_MINOR 239
71#define USERIO_MINOR 240
72#define VHOST_VSOCK_MINOR 241
73#define EISA_EEPROM_MINOR 241
74#define RFKILL_MINOR 242
75
76/*
77 * Misc char device minor code space division related to below macro:
78 *
79 * < 255 : Fixed minor code
80 * == 255 : Indicator to request dynamic minor code
81 * > 255 : Dynamic minor code requested, 1048320 minor codes totally.
82 */
83#define MISC_DYNAMIC_MINOR 255
84
85struct miscdevice {
86 int minor;
87 const char *name;
88 const struct file_operations *fops;
89 struct list_head list;
90 struct device *parent;
91 struct device *this_device;
92 const struct attribute_group **groups;
93 const char *nodename;
94 umode_t mode;
95};
96
97extern int misc_register(struct miscdevice *misc);
98extern void misc_deregister(struct miscdevice *misc);
99
100/*
101 * Helper macro for drivers that don't do anything special in the initcall.
102 * This helps to eliminate boilerplate code.
103 */
104#define builtin_misc_device(__misc_device) \
105 builtin_driver(__misc_device, misc_register)
106
107/*
108 * Helper macro for drivers that don't do anything special in module init / exit
109 * call. This helps to eliminate boilerplate code.
110 */
111#define module_misc_device(__misc_device) \
112 module_driver(__misc_device, misc_register, misc_deregister)
113
114#define MODULE_ALIAS_MISCDEV(minor) \
115 MODULE_ALIAS("char-major-" __stringify(MISC_MAJOR) \
116 "-" __stringify(minor))
117#endif
118