xref: /linux-6.15/include/linux/miscdevice.h (revision da61e730)
1 #ifndef _LINUX_MISCDEVICE_H
2 #define _LINUX_MISCDEVICE_H
3 #include <linux/major.h>
4 #include <linux/list.h>
5 #include <linux/types.h>
6 #include <linux/device.h>
7 
8 /*
9  *	These allocations are managed by [email protected]. If you use an
10  *	entry that is not in assigned your entry may well be moved and
11  *	reassigned, or set dynamic if a fixed value is not justified.
12  */
13 
14 #define PSMOUSE_MINOR		1
15 #define MS_BUSMOUSE_MINOR	2	/* unused */
16 #define ATIXL_BUSMOUSE_MINOR	3	/* unused */
17 /*#define AMIGAMOUSE_MINOR	4	FIXME OBSOLETE */
18 #define ATARIMOUSE_MINOR	5	/* unused */
19 #define SUN_MOUSE_MINOR		6	/* unused */
20 #define APOLLO_MOUSE_MINOR	7	/* unused */
21 #define PC110PAD_MINOR		9	/* unused */
22 /*#define ADB_MOUSE_MINOR	10	FIXME OBSOLETE */
23 #define WATCHDOG_MINOR		130	/* Watchdog timer     */
24 #define TEMP_MINOR		131	/* Temperature Sensor */
25 #define APM_MINOR_DEV		134
26 #define RTC_MINOR		135
27 #define EFI_RTC_MINOR		136	/* EFI Time services */
28 #define VHCI_MINOR		137
29 #define SUN_OPENPROM_MINOR	139
30 #define DMAPI_MINOR		140	/* unused */
31 #define NVRAM_MINOR		144
32 #define SGI_MMTIMER		153
33 #define STORE_QUEUE_MINOR	155	/* unused */
34 #define I2O_MINOR		166
35 #define HWRNG_MINOR		183
36 #define MICROCODE_MINOR		184
37 #define IRNET_MINOR		187
38 #define D7S_MINOR		193
39 #define VFIO_MINOR		196
40 #define TUN_MINOR		200
41 #define CUSE_MINOR		203
42 #define MWAVE_MINOR		219	/* ACP/Mwave Modem */
43 #define MPT_MINOR		220
44 #define MPT2SAS_MINOR		221
45 #define MPT3SAS_MINOR		222
46 #define UINPUT_MINOR		223
47 #define MISC_MCELOG_MINOR	227
48 #define HPET_MINOR		228
49 #define FUSE_MINOR		229
50 #define KVM_MINOR		232
51 #define BTRFS_MINOR		234
52 #define AUTOFS_MINOR		235
53 #define MAPPER_CTRL_MINOR	236
54 #define LOOP_CTRL_MINOR		237
55 #define VHOST_NET_MINOR		238
56 #define UHID_MINOR		239
57 #define USERIO_MINOR		240
58 #define VHOST_VSOCK_MINOR	241
59 #define MISC_DYNAMIC_MINOR	255
60 
61 struct device;
62 struct attribute_group;
63 
64 struct miscdevice  {
65 	int minor;
66 	const char *name;
67 	const struct file_operations *fops;
68 	struct list_head list;
69 	struct device *parent;
70 	struct device *this_device;
71 	const struct attribute_group **groups;
72 	const char *nodename;
73 	umode_t mode;
74 };
75 
76 extern int misc_register(struct miscdevice *misc);
77 extern void misc_deregister(struct miscdevice *misc);
78 
79 /*
80  * Helper macro for drivers that don't do anything special in the initcall.
81  * This helps in eleminating of boilerplate code.
82  */
83 #define builtin_misc_device(__misc_device) \
84 	builtin_driver(__misc_device, misc_register)
85 
86 /*
87  * Helper macro for drivers that don't do anything special in module init / exit
88  * call. This helps in eleminating of boilerplate code.
89  */
90 #define module_misc_device(__misc_device) \
91 	module_driver(__misc_device, misc_register, misc_deregister)
92 
93 #define MODULE_ALIAS_MISCDEV(minor)				\
94 	MODULE_ALIAS("char-major-" __stringify(MISC_MAJOR)	\
95 	"-" __stringify(minor))
96 #endif
97