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drivers: power: report battery voltage in AOSP compatible format
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / Documentation / devices.txt
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1da177e4
LT		 1
2 LINUX ALLOCATED DEVICES (2.6+ version)
3
04c860c1 4 Maintained by Alan Cox <device@lanana.org>
1da177e4 5
e379ec7c 6 Last revised: 6th April 2009
1da177e4
LT		 7
8This list is the Linux Device List, the official registry of allocated
9device numbers and /dev directory nodes for the Linux operating
10system.
11
12The latest version of this list is available from
13http://www.lanana.org/docs/device-list/ or
14ftp://ftp.kernel.org/pub/linux/docs/device-list/. This version may be
15newer than the one distributed with the Linux kernel.
16
17The LaTeX version of this document is no longer maintained.
18
19This document is included by reference into the Filesystem Hierarchy
20Standard (FHS). The FHS is available from http://www.pathname.com/fhs/.
21
22Allocations marked (68k/Amiga) apply to Linux/68k on the Amiga
23platform only. Allocations marked (68k/Atari) apply to Linux/68k on
24the Atari platform only.
25
26The symbol {2.6} means the allocation is obsolete and scheduled for
27removal once kernel version 2.6 (or equivalent) is released. Some of these
28allocations have already been removed.
29
30This document is in the public domain. The author requests, however,
31that semantically altered versions are not distributed without
32permission of the author, assuming the author can be contacted without
33an unreasonable effort.
34
35In particular, please don't sent patches for this list to Linus, at
36least not without contacting me first.
37
38I do not have any information about these devices beyond what appears
39on this list. Any such information requests will be deleted without
40reply.
41
42
43 **** DEVICE DRIVERS AUTHORS PLEASE READ THIS ****
44
45To have a major number allocated, or a minor number in situations
46where that applies (e.g. busmice), please contact me with the
47appropriate device information. Also, if you have additional
48information regarding any of the devices listed below, or if I have
49made a mistake, I would greatly appreciate a note.
50
51I do, however, make a few requests about the nature of your report.
52This is necessary for me to be able to keep this list up to date and
53correct in a timely manner. First of all, *please* send it to the
54correct address... <device@lanana.org>. I receive hundreds of email
55messages a day, so mail sent to other addresses may very well get lost
56in the avalanche. Please put in a descriptive subject, so I can find
57your mail again should I need to. Too many people send me email
58saying just "device number request" in the subject.
59
60Second, please include a description of the device *in the same format
61as this list*. The reason for this is that it is the only way I have
62found to ensure I have all the requisite information to publish your
63device and avoid conflicts.
64
65Third, please don't assume that the distributed version of the list is
66up to date. Due to the number of registrations I have to maintain it
67in "batch mode", so there is likely additional registrations that
68haven't been listed yet.
69
04c860c1
AC		 70Fourth, remember that Linux now has extensive support for dynamic allocation
71of device numbering and can use sysfs and udev to handle the naming needs.
72There are still some exceptions in the serial and boot device area. Before
73asking for a device number make sure you actually need one.
74
1da177e4
LT		 75Finally, sometimes I have to play "namespace police." Please don't be
76offended. I often get submissions for /dev names that would be bound
77to cause conflicts down the road. I am trying to avoid getting in a
78situation where we would have to suffer an incompatible forward
79change. Therefore, please consult with me *before* you make your
80device names and numbers in any way public, at least to the point
81where it would be at all difficult to get them changed.
82
83Your cooperation is appreciated.
84
85
86 0 Unnamed devices (e.g. non-device mounts)
87 0 = reserved as null device number
88 See block major 144, 145, 146 for expansion areas.
89
90 1 char Memory devices
91 1 = /dev/mem Physical memory access
92 2 = /dev/kmem Kernel virtual memory access
93 3 = /dev/null Null device
94 4 = /dev/port I/O port access
95 5 = /dev/zero Null byte source
96 6 = /dev/core OBSOLETE - replaced by /proc/kcore
97 7 = /dev/full Returns ENOSPC on write
98 8 = /dev/random Nondeterministic random number gen.
99 9 = /dev/urandom Faster, less secure random number gen.
5d3f083d 100 10 = /dev/aio Asynchronous I/O notification interface
3b552b92
KS		 101 11 = /dev/kmsg Writes to this come out as printk's, reads
102 export the buffered printk records.
8814842f
DJ		 103 12 = /dev/oldmem Used by crashdump kernels to access
104 the memory of the kernel that crashed.
30aaa5c6 105
1da177e4
LT		 106 1 block RAM disk
107 0 = /dev/ram0 First RAM disk
108 1 = /dev/ram1 Second RAM disk
109 ...
04c860c1 110 250 = /dev/initrd Initial RAM disk
1da177e4
LT		 111
112 Older kernels had /dev/ramdisk (1, 1) here.
113 /dev/initrd refers to a RAM disk which was preloaded
114 by the boot loader; newer kernels use /dev/ram0 for
115 the initrd.
116
117 2 char Pseudo-TTY masters
118 0 = /dev/ptyp0 First PTY master
119 1 = /dev/ptyp1 Second PTY master
120 ...
121 255 = /dev/ptyef 256th PTY master
122
123 Pseudo-tty's are named as follows:
124 * Masters are "pty", slaves are "tty";
125 * the fourth letter is one of pqrstuvwxyzabcde indicating
126 the 1st through 16th series of 16 pseudo-ttys each, and
127 * the fifth letter is one of 0123456789abcdef indicating
128 the position within the series.
129
130 These are the old-style (BSD) PTY devices; Unix98
131 devices are on major 128 and above and use the PTY
132 master multiplex (/dev/ptmx) to acquire a PTY on
133 demand.
30aaa5c6 134
1da177e4
LT		 135 2 block Floppy disks
136 0 = /dev/fd0 Controller 0, drive 0, autodetect
137 1 = /dev/fd1 Controller 0, drive 1, autodetect
138 2 = /dev/fd2 Controller 0, drive 2, autodetect
139 3 = /dev/fd3 Controller 0, drive 3, autodetect
140 128 = /dev/fd4 Controller 1, drive 0, autodetect
141 129 = /dev/fd5 Controller 1, drive 1, autodetect
142 130 = /dev/fd6 Controller 1, drive 2, autodetect
143 131 = /dev/fd7 Controller 1, drive 3, autodetect
144
145 To specify format, add to the autodetect device number:
146 0 = /dev/fd? Autodetect format
147 4 = /dev/fd?d360 5.25" 360K in a 360K drive(1)
148 20 = /dev/fd?h360 5.25" 360K in a 1200K drive(1)
149 48 = /dev/fd?h410 5.25" 410K in a 1200K drive
150 64 = /dev/fd?h420 5.25" 420K in a 1200K drive
151 24 = /dev/fd?h720 5.25" 720K in a 1200K drive
152 80 = /dev/fd?h880 5.25" 880K in a 1200K drive(1)
153 8 = /dev/fd?h1200 5.25" 1200K in a 1200K drive(1)
154 40 = /dev/fd?h1440 5.25" 1440K in a 1200K drive(1)
155 56 = /dev/fd?h1476 5.25" 1476K in a 1200K drive
156 72 = /dev/fd?h1494 5.25" 1494K in a 1200K drive
157 92 = /dev/fd?h1600 5.25" 1600K in a 1200K drive(1)
158
159 12 = /dev/fd?u360 3.5" 360K Double Density(2)
160 16 = /dev/fd?u720 3.5" 720K Double Density(1)
161 120 = /dev/fd?u800 3.5" 800K Double Density(2)
162 52 = /dev/fd?u820 3.5" 820K Double Density
163 68 = /dev/fd?u830 3.5" 830K Double Density
164 84 = /dev/fd?u1040 3.5" 1040K Double Density(1)
165 88 = /dev/fd?u1120 3.5" 1120K Double Density(1)
166 28 = /dev/fd?u1440 3.5" 1440K High Density(1)
167 124 = /dev/fd?u1600 3.5" 1600K High Density(1)
168 44 = /dev/fd?u1680 3.5" 1680K High Density(3)
169 60 = /dev/fd?u1722 3.5" 1722K High Density
170 76 = /dev/fd?u1743 3.5" 1743K High Density
171 96 = /dev/fd?u1760 3.5" 1760K High Density
172 116 = /dev/fd?u1840 3.5" 1840K High Density(3)
173 100 = /dev/fd?u1920 3.5" 1920K High Density(1)
174 32 = /dev/fd?u2880 3.5" 2880K Extra Density(1)
175 104 = /dev/fd?u3200 3.5" 3200K Extra Density
176 108 = /dev/fd?u3520 3.5" 3520K Extra Density
177 112 = /dev/fd?u3840 3.5" 3840K Extra Density(1)
178
179 36 = /dev/fd?CompaQ Compaq 2880K drive; obsolete?
180
181 (1) Autodetectable format
182 (2) Autodetectable format in a Double Density (720K) drive only
183 (3) Autodetectable format in a High Density (1440K) drive only
184
185 NOTE: The letter in the device name (d, q, h or u)
186 signifies the type of drive: 5.25" Double Density (d),
187 5.25" Quad Density (q), 5.25" High Density (h) or 3.5"
188 (any model, u). The use of the capital letters D, H
189 and E for the 3.5" models have been deprecated, since
190 the drive type is insignificant for these devices.
191
192 3 char Pseudo-TTY slaves
193 0 = /dev/ttyp0 First PTY slave
194 1 = /dev/ttyp1 Second PTY slave
195 ...
196 255 = /dev/ttyef 256th PTY slave
197
198 These are the old-style (BSD) PTY devices; Unix98
199 devices are on major 136 and above.
200
201 3 block First MFM, RLL and IDE hard disk/CD-ROM interface
202 0 = /dev/hda Master: whole disk (or CD-ROM)
203 64 = /dev/hdb Slave: whole disk (or CD-ROM)
204
205 For partitions, add to the whole disk device number:
206 0 = /dev/hd? Whole disk
207 1 = /dev/hd?1 First partition
208 2 = /dev/hd?2 Second partition
209 ...
210 63 = /dev/hd?63 63rd partition
211
212 For Linux/i386, partitions 1-4 are the primary
213 partitions, and 5 and above are logical partitions.
214 Other versions of Linux use partitioning schemes
215 appropriate to their respective architectures.
216
217 4 char TTY devices
218 0 = /dev/tty0 Current virtual console
219
220 1 = /dev/tty1 First virtual console
221 ...
222 63 = /dev/tty63 63rd virtual console
223 64 = /dev/ttyS0 First UART serial port
224 ...
225 255 = /dev/ttyS191 192nd UART serial port
226
227 UART serial ports refer to 8250/16450/16550 series devices.
228
229 Older versions of the Linux kernel used this major
230 number for BSD PTY devices. As of Linux 2.1.115, this
231 is no longer supported. Use major numbers 2 and 3.
232
233 4 block Aliases for dynamically allocated major devices to be used
234 when its not possible to create the real device nodes
235 because the root filesystem is mounted read-only.
236
237 0 = /dev/root
238
239 5 char Alternate TTY devices
240 0 = /dev/tty Current TTY device
241 1 = /dev/console System console
242 2 = /dev/ptmx PTY master multiplex
24b4b67d 243 3 = /dev/ttyprintk User messages via printk TTY device
1da177e4
LT		 244 64 = /dev/cua0 Callout device for ttyS0
245 ...
246 255 = /dev/cua191 Callout device for ttyS191
247
248 (5,1) is /dev/console starting with Linux 2.1.71. See
249 the section on terminal devices for more information
250 on /dev/console.
251
252 6 char Parallel printer devices
253 0 = /dev/lp0 Parallel printer on parport0
254 1 = /dev/lp1 Parallel printer on parport1
255 ...
256
257 Current Linux kernels no longer have a fixed mapping
258 between parallel ports and I/O addresses. Instead,
259 they are redirected through the parport multiplex layer.
260
261 7 char Virtual console capture devices
262 0 = /dev/vcs Current vc text contents
263 1 = /dev/vcs1 tty1 text contents
264 ...
265 63 = /dev/vcs63 tty63 text contents
266 128 = /dev/vcsa Current vc text/attribute contents
267 129 = /dev/vcsa1 tty1 text/attribute contents
268 ...
269 191 = /dev/vcsa63 tty63 text/attribute contents
30aaa5c6 270
1da177e4
LT		 271 NOTE: These devices permit both read and write access.
272
273 7 block Loopback devices
11420211
JE		 274 0 = /dev/loop0 First loop device
275 1 = /dev/loop1 Second loop device
1da177e4
LT		 276 ...
277
11420211 278 The loop devices are used to mount filesystems not
1da177e4 279 associated with block devices. The binding to the
11420211 280 loop devices is handled by mount(8) or losetup(8).
1da177e4
LT		 281
282 8 block SCSI disk devices (0-15)
283 0 = /dev/sda First SCSI disk whole disk
284 16 = /dev/sdb Second SCSI disk whole disk
285 32 = /dev/sdc Third SCSI disk whole disk
286 ...
287 240 = /dev/sdp Sixteenth SCSI disk whole disk
288
289 Partitions are handled in the same way as for IDE
290 disks (see major number 3) except that the limit on
291 partitions is 15.
292
293 9 char SCSI tape devices
294 0 = /dev/st0 First SCSI tape, mode 0
295 1 = /dev/st1 Second SCSI tape, mode 0
296 ...
297 32 = /dev/st0l First SCSI tape, mode 1
298 33 = /dev/st1l Second SCSI tape, mode 1
299 ...
300 64 = /dev/st0m First SCSI tape, mode 2
301 65 = /dev/st1m Second SCSI tape, mode 2
302 ...
303 96 = /dev/st0a First SCSI tape, mode 3
304 97 = /dev/st1a Second SCSI tape, mode 3
305 ...
306 128 = /dev/nst0 First SCSI tape, mode 0, no rewind
307 129 = /dev/nst1 Second SCSI tape, mode 0, no rewind
308 ...
309 160 = /dev/nst0l First SCSI tape, mode 1, no rewind
310 161 = /dev/nst1l Second SCSI tape, mode 1, no rewind
311 ...
312 192 = /dev/nst0m First SCSI tape, mode 2, no rewind
313 193 = /dev/nst1m Second SCSI tape, mode 2, no rewind
314 ...
315 224 = /dev/nst0a First SCSI tape, mode 3, no rewind
316 225 = /dev/nst1a Second SCSI tape, mode 3, no rewind
317 ...
318
319 "No rewind" refers to the omission of the default
320 automatic rewind on device close. The MTREW or MTOFFL
321 ioctl()'s can be used to rewind the tape regardless of
322 the device used to access it.
323
324 9 block Metadisk (RAID) devices
325 0 = /dev/md0 First metadisk group
326 1 = /dev/md1 Second metadisk group
327 ...
328
329 The metadisk driver is used to span a
330 filesystem across multiple physical disks.
331
332 10 char Non-serial mice, misc features
333 0 = /dev/logibm Logitech bus mouse
334 1 = /dev/psaux PS/2-style mouse port
335 2 = /dev/inportbm Microsoft Inport bus mouse
336 3 = /dev/atibm ATI XL bus mouse
337 4 = /dev/jbm J-mouse
338 4 = /dev/amigamouse Amiga mouse (68k/Amiga)
339 5 = /dev/atarimouse Atari mouse
340 6 = /dev/sunmouse Sun mouse
341 7 = /dev/amigamouse1 Second Amiga mouse
342 8 = /dev/smouse Simple serial mouse driver
343 9 = /dev/pc110pad IBM PC-110 digitizer pad
344 10 = /dev/adbmouse Apple Desktop Bus mouse
345 11 = /dev/vrtpanel Vr41xx embedded touch panel
346 13 = /dev/vpcmouse Connectix Virtual PC Mouse
347 14 = /dev/touchscreen/ucb1x00 UCB 1x00 touchscreen
348 15 = /dev/touchscreen/mk712 MK712 touchscreen
349 128 = /dev/beep Fancy beep device
04c860c1 350 129 =
1da177e4
LT		 351 130 = /dev/watchdog Watchdog timer port
352 131 = /dev/temperature Machine internal temperature
353 132 = /dev/hwtrap Hardware fault trap
354 133 = /dev/exttrp External device trap
355 134 = /dev/apm_bios Advanced Power Management BIOS
356 135 = /dev/rtc Real Time Clock
357 139 = /dev/openprom SPARC OpenBoot PROM
358 140 = /dev/relay8 Berkshire Products Octal relay card
359 141 = /dev/relay16 Berkshire Products ISO-16 relay card
04c860c1 360 142 =
1da177e4
LT		 361 143 = /dev/pciconf PCI configuration space
362 144 = /dev/nvram Non-volatile configuration RAM
04c860c1 363 145 = /dev/hfmodem Soundcard shortwave modem control
1da177e4
LT		 364 146 = /dev/graphics Linux/SGI graphics device
365 147 = /dev/opengl Linux/SGI OpenGL pipe
366 148 = /dev/gfx Linux/SGI graphics effects device
367 149 = /dev/input/mouse Linux/SGI Irix emulation mouse
368 150 = /dev/input/keyboard Linux/SGI Irix emulation keyboard
369 151 = /dev/led Front panel LEDs
370 152 = /dev/kpoll Kernel Poll Driver
371 153 = /dev/mergemem Memory merge device
372 154 = /dev/pmu Macintosh PowerBook power manager
373 155 = /dev/isictl MultiTech ISICom serial control
374 156 = /dev/lcd Front panel LCD display
375 157 = /dev/ac Applicom Intl Profibus card
376 158 = /dev/nwbutton Netwinder external button
377 159 = /dev/nwdebug Netwinder debug interface
378 160 = /dev/nwflash Netwinder flash memory
379 161 = /dev/userdma User-space DMA access
380 162 = /dev/smbus System Management Bus
381 163 = /dev/lik Logitech Internet Keyboard
382 164 = /dev/ipmo Intel Intelligent Platform Management
bc28633e 383 165 = /dev/vmmon VMware virtual machine monitor
1da177e4
LT		 384 166 = /dev/i2o/ctl I2O configuration manager
385 167 = /dev/specialix_sxctl Specialix serial control
386 168 = /dev/tcldrv Technology Concepts serial control
387 169 = /dev/specialix_rioctl Specialix RIO serial control
388 170 = /dev/thinkpad/thinkpad IBM Thinkpad devices
389 171 = /dev/srripc QNX4 API IPC manager
390 172 = /dev/usemaclone Semaphore clone device
391 173 = /dev/ipmikcs Intelligent Platform Management
392 174 = /dev/uctrl SPARCbook 3 microcontroller
393 175 = /dev/agpgart AGP Graphics Address Remapping Table
394 176 = /dev/gtrsc Gorgy Timing radio clock
395 177 = /dev/cbm Serial CBM bus
396 178 = /dev/jsflash JavaStation OS flash SIMM
397 179 = /dev/xsvc High-speed shared-mem/semaphore service
398 180 = /dev/vrbuttons Vr41xx button input device
399 181 = /dev/toshiba Toshiba laptop SMM support
400 182 = /dev/perfctr Performance-monitoring counters
401 183 = /dev/hwrng Generic random number generator
402 184 = /dev/cpu/microcode CPU microcode update interface
403 186 = /dev/atomicps Atomic shapshot of process state data
404 187 = /dev/irnet IrNET device
405 188 = /dev/smbusbios SMBus BIOS
406 189 = /dev/ussp_ctl User space serial port control
407 190 = /dev/crash Mission Critical Linux crash dump facility
408 191 = /dev/pcl181 <information missing>
409 192 = /dev/nas_xbus NAS xbus LCD/buttons access
410 193 = /dev/d7s SPARC 7-segment display
411 194 = /dev/zkshim Zero-Knowledge network shim control
412 195 = /dev/elographics/e2201 Elographics touchscreen E271-2201
413 198 = /dev/sexec Signed executable interface
414 199 = /dev/scanners/cuecat :CueCat barcode scanner
415 200 = /dev/net/tun TAP/TUN network device
416 201 = /dev/button/gulpb Transmeta GULP-B buttons
417 202 = /dev/emd/ctl Enhanced Metadisk RAID (EMD) control
418 204 = /dev/video/em8300 EM8300 DVD decoder control
419 205 = /dev/video/em8300_mv EM8300 DVD decoder video
420 206 = /dev/video/em8300_ma EM8300 DVD decoder audio
421 207 = /dev/video/em8300_sp EM8300 DVD decoder subpicture
422 208 = /dev/compaq/cpqphpc Compaq PCI Hot Plug Controller
423 209 = /dev/compaq/cpqrid Compaq Remote Insight Driver
30aaa5c6 424 210 = /dev/impi/bt IMPI coprocessor block transfer
1da177e4
LT		 425 211 = /dev/impi/smic IMPI coprocessor stream interface
426 212 = /dev/watchdogs/0 First watchdog device
427 213 = /dev/watchdogs/1 Second watchdog device
428 214 = /dev/watchdogs/2 Third watchdog device
429 215 = /dev/watchdogs/3 Fourth watchdog device
430 216 = /dev/fujitsu/apanel Fujitsu/Siemens application panel
431 217 = /dev/ni/natmotn National Instruments Motion
432 218 = /dev/kchuid Inter-process chuid control
433 219 = /dev/modems/mwave MWave modem firmware upload
434 220 = /dev/mptctl Message passing technology (MPT) control
435 221 = /dev/mvista/hssdsi Montavista PICMG hot swap system driver
436 222 = /dev/mvista/hasi Montavista PICMG high availability
437 223 = /dev/input/uinput User level driver support for input
438 224 = /dev/tpm TCPA TPM driver
439 225 = /dev/pps Pulse Per Second driver
440 226 = /dev/systrace Systrace device
441 227 = /dev/mcelog X86_64 Machine Check Exception driver
442 228 = /dev/hpet HPET driver
443 229 = /dev/fuse Fuse (virtual filesystem in user-space)
444 230 = /dev/midishare MidiShare driver
04c860c1
AC		 445 231 = /dev/snapshot System memory snapshot device
446 232 = /dev/kvm Kernel-based virtual machine (hardware virtualization extensions)
447 233 = /dev/kmview View-OS A process with a view
578454ff
KS		 448 234 = /dev/btrfs-control Btrfs control device
449 235 = /dev/autofs Autofs control device
7e507eb6 450 236 = /dev/mapper/control Device-Mapper control device
7c7c7f01 451 237 = /dev/loop-control Loopback control device
452 238 = /dev/vhost-net Host kernel accelerator for virtio net
453
1da177e4
LT		 454 240-254 Reserved for local use
455 255 Reserved for MISC_DYNAMIC_MINOR
456
457 11 char Raw keyboard device (Linux/SPARC only)
458 0 = /dev/kbd Raw keyboard device
459
460 11 char Serial Mux device (Linux/PA-RISC only)
461 0 = /dev/ttyB0 First mux port
462 1 = /dev/ttyB1 Second mux port
463 ...
464
465 11 block SCSI CD-ROM devices
466 0 = /dev/scd0 First SCSI CD-ROM
467 1 = /dev/scd1 Second SCSI CD-ROM
468 ...
469
470 The prefix /dev/sr (instead of /dev/scd) has been deprecated.
471
472 12 char QIC-02 tape
473 2 = /dev/ntpqic11 QIC-11, no rewind-on-close
474 3 = /dev/tpqic11 QIC-11, rewind-on-close
475 4 = /dev/ntpqic24 QIC-24, no rewind-on-close
476 5 = /dev/tpqic24 QIC-24, rewind-on-close
477 6 = /dev/ntpqic120 QIC-120, no rewind-on-close
478 7 = /dev/tpqic120 QIC-120, rewind-on-close
479 8 = /dev/ntpqic150 QIC-150, no rewind-on-close
480 9 = /dev/tpqic150 QIC-150, rewind-on-close
481
482 The device names specified are proposed -- if there
483 are "standard" names for these devices, please let me know.
484
04c860c1 485 12 block
1da177e4
LT		 486
487 13 char Input core
488 0 = /dev/input/js0 First joystick
489 1 = /dev/input/js1 Second joystick
490 ...
491 32 = /dev/input/mouse0 First mouse
492 33 = /dev/input/mouse1 Second mouse
493 ...
494 63 = /dev/input/mice Unified mouse
495 64 = /dev/input/event0 First event queue
496 65 = /dev/input/event1 Second event queue
497 ...
498
499 Each device type has 5 bits (32 minors).
500
1fbeeba3
LW		 501 13 block Previously used for the XT disk (/dev/xdN)
502 Deleted in kernel v3.9.
1da177e4
LT		 503
504 14 char Open Sound System (OSS)
505 0 = /dev/mixer Mixer control
506 1 = /dev/sequencer Audio sequencer
507 2 = /dev/midi00 First MIDI port
508 3 = /dev/dsp Digital audio
509 4 = /dev/audio Sun-compatible digital audio
04c860c1 510 6 =
1da177e4
LT		 511 7 = /dev/audioctl SPARC audio control device
512 8 = /dev/sequencer2 Sequencer -- alternate device
513 16 = /dev/mixer1 Second soundcard mixer control
514 17 = /dev/patmgr0 Sequencer patch manager
515 18 = /dev/midi01 Second MIDI port
516 19 = /dev/dsp1 Second soundcard digital audio
517 20 = /dev/audio1 Second soundcard Sun digital audio
518 33 = /dev/patmgr1 Sequencer patch manager
519 34 = /dev/midi02 Third MIDI port
520 50 = /dev/midi03 Fourth MIDI port
30aaa5c6 521
04c860c1 522 14 block
1da177e4
LT		 523
524 15 char Joystick
525 0 = /dev/js0 First analog joystick
526 1 = /dev/js1 Second analog joystick
527 ...
528 128 = /dev/djs0 First digital joystick
529 129 = /dev/djs1 Second digital joystick
530 ...
531 15 block Sony CDU-31A/CDU-33A CD-ROM
532 0 = /dev/sonycd Sony CDU-31a CD-ROM
533
534 16 char Non-SCSI scanners
535 0 = /dev/gs4500 Genius 4500 handheld scanner
30aaa5c6 536
1da177e4
LT		 537 16 block GoldStar CD-ROM
538 0 = /dev/gscd GoldStar CD-ROM
539
04c860c1 540 17 char OBSOLETE (was Chase serial card)
1da177e4
LT		 541 0 = /dev/ttyH0 First Chase port
542 1 = /dev/ttyH1 Second Chase port
543 ...
544 17 block Optics Storage CD-ROM
545 0 = /dev/optcd Optics Storage CD-ROM
546
04c860c1 547 18 char OBSOLETE (was Chase serial card - alternate devices)
1da177e4
LT		 548 0 = /dev/cuh0 Callout device for ttyH0
549 1 = /dev/cuh1 Callout device for ttyH1
550 ...
551 18 block Sanyo CD-ROM
552 0 = /dev/sjcd Sanyo CD-ROM
553
554 19 char Cyclades serial card
555 0 = /dev/ttyC0 First Cyclades port
556 ...
557 31 = /dev/ttyC31 32nd Cyclades port
30aaa5c6 558
1da177e4
LT		 559 19 block "Double" compressed disk
560 0 = /dev/double0 First compressed disk
561 ...
562 7 = /dev/double7 Eighth compressed disk
563 128 = /dev/cdouble0 Mirror of first compressed disk
564 ...
565 135 = /dev/cdouble7 Mirror of eighth compressed disk
566
567 See the Double documentation for the meaning of the
568 mirror devices.
569
570 20 char Cyclades serial card - alternate devices
571 0 = /dev/cub0 Callout device for ttyC0
572 ...
573 31 = /dev/cub31 Callout device for ttyC31
30aaa5c6 574
1da177e4
LT		 575 20 block Hitachi CD-ROM (under development)
576 0 = /dev/hitcd Hitachi CD-ROM
577
578 21 char Generic SCSI access
579 0 = /dev/sg0 First generic SCSI device
580 1 = /dev/sg1 Second generic SCSI device
581 ...
582
583 Most distributions name these /dev/sga, /dev/sgb...;
584 this sets an unnecessary limit of 26 SCSI devices in
585 the system and is counter to standard Linux
586 device-naming practice.
587
588 21 block Acorn MFM hard drive interface
589 0 = /dev/mfma First MFM drive whole disk
590 64 = /dev/mfmb Second MFM drive whole disk
591
592 This device is used on the ARM-based Acorn RiscPC.
593 Partitions are handled the same way as for IDE disks
30aaa5c6 594 (see major number 3).
1da177e4
LT		 595
596 22 char Digiboard serial card
597 0 = /dev/ttyD0 First Digiboard port
598 1 = /dev/ttyD1 Second Digiboard port
599 ...
600 22 block Second IDE hard disk/CD-ROM interface
601 0 = /dev/hdc Master: whole disk (or CD-ROM)
602 64 = /dev/hdd Slave: whole disk (or CD-ROM)
30aaa5c6 603
1da177e4
LT		 604 Partitions are handled the same way as for the first
605 interface (see major number 3).
606
607 23 char Digiboard serial card - alternate devices
608 0 = /dev/cud0 Callout device for ttyD0
609 1 = /dev/cud1 Callout device for ttyD1
610 ...
611 23 block Mitsumi proprietary CD-ROM
612 0 = /dev/mcd Mitsumi CD-ROM
613
614 24 char Stallion serial card
615 0 = /dev/ttyE0 Stallion port 0 card 0
616 1 = /dev/ttyE1 Stallion port 1 card 0
617 ...
618 64 = /dev/ttyE64 Stallion port 0 card 1
619 65 = /dev/ttyE65 Stallion port 1 card 1
620 ...
621 128 = /dev/ttyE128 Stallion port 0 card 2
622 129 = /dev/ttyE129 Stallion port 1 card 2
623 ...
624 192 = /dev/ttyE192 Stallion port 0 card 3
625 193 = /dev/ttyE193 Stallion port 1 card 3
626 ...
627 24 block Sony CDU-535 CD-ROM
628 0 = /dev/cdu535 Sony CDU-535 CD-ROM
629
630 25 char Stallion serial card - alternate devices
631 0 = /dev/cue0 Callout device for ttyE0
632 1 = /dev/cue1 Callout device for ttyE1
633 ...
634 64 = /dev/cue64 Callout device for ttyE64
635 65 = /dev/cue65 Callout device for ttyE65
636 ...
637 128 = /dev/cue128 Callout device for ttyE128
638 129 = /dev/cue129 Callout device for ttyE129
639 ...
640 192 = /dev/cue192 Callout device for ttyE192
641 193 = /dev/cue193 Callout device for ttyE193
642 ...
643 25 block First Matsushita (Panasonic/SoundBlaster) CD-ROM
644 0 = /dev/sbpcd0 Panasonic CD-ROM controller 0 unit 0
645 1 = /dev/sbpcd1 Panasonic CD-ROM controller 0 unit 1
646 2 = /dev/sbpcd2 Panasonic CD-ROM controller 0 unit 2
647 3 = /dev/sbpcd3 Panasonic CD-ROM controller 0 unit 3
648
04c860c1 649 26 char
30aaa5c6 650
1da177e4
LT		 651 26 block Second Matsushita (Panasonic/SoundBlaster) CD-ROM
652 0 = /dev/sbpcd4 Panasonic CD-ROM controller 1 unit 0
653 1 = /dev/sbpcd5 Panasonic CD-ROM controller 1 unit 1
654 2 = /dev/sbpcd6 Panasonic CD-ROM controller 1 unit 2
655 3 = /dev/sbpcd7 Panasonic CD-ROM controller 1 unit 3
656
657 27 char QIC-117 tape
658 0 = /dev/qft0 Unit 0, rewind-on-close
659 1 = /dev/qft1 Unit 1, rewind-on-close
660 2 = /dev/qft2 Unit 2, rewind-on-close
661 3 = /dev/qft3 Unit 3, rewind-on-close
662 4 = /dev/nqft0 Unit 0, no rewind-on-close
663 5 = /dev/nqft1 Unit 1, no rewind-on-close
664 6 = /dev/nqft2 Unit 2, no rewind-on-close
665 7 = /dev/nqft3 Unit 3, no rewind-on-close
666 16 = /dev/zqft0 Unit 0, rewind-on-close, compression
667 17 = /dev/zqft1 Unit 1, rewind-on-close, compression
668 18 = /dev/zqft2 Unit 2, rewind-on-close, compression
669 19 = /dev/zqft3 Unit 3, rewind-on-close, compression
670 20 = /dev/nzqft0 Unit 0, no rewind-on-close, compression
671 21 = /dev/nzqft1 Unit 1, no rewind-on-close, compression
672 22 = /dev/nzqft2 Unit 2, no rewind-on-close, compression
673 23 = /dev/nzqft3 Unit 3, no rewind-on-close, compression
674 32 = /dev/rawqft0 Unit 0, rewind-on-close, no file marks
675 33 = /dev/rawqft1 Unit 1, rewind-on-close, no file marks
676 34 = /dev/rawqft2 Unit 2, rewind-on-close, no file marks
677 35 = /dev/rawqft3 Unit 3, rewind-on-close, no file marks
678 36 = /dev/nrawqft0 Unit 0, no rewind-on-close, no file marks
679 37 = /dev/nrawqft1 Unit 1, no rewind-on-close, no file marks
680 38 = /dev/nrawqft2 Unit 2, no rewind-on-close, no file marks
681 39 = /dev/nrawqft3 Unit 3, no rewind-on-close, no file marks
30aaa5c6 682
1da177e4
LT		 683 27 block Third Matsushita (Panasonic/SoundBlaster) CD-ROM
684 0 = /dev/sbpcd8 Panasonic CD-ROM controller 2 unit 0
685 1 = /dev/sbpcd9 Panasonic CD-ROM controller 2 unit 1
686 2 = /dev/sbpcd10 Panasonic CD-ROM controller 2 unit 2
687 3 = /dev/sbpcd11 Panasonic CD-ROM controller 2 unit 3
688
689 28 char Stallion serial card - card programming
690 0 = /dev/staliomem0 First Stallion card I/O memory
691 1 = /dev/staliomem1 Second Stallion card I/O memory
692 2 = /dev/staliomem2 Third Stallion card I/O memory
693 3 = /dev/staliomem3 Fourth Stallion card I/O memory
30aaa5c6 694
1da177e4
LT		 695 28 char Atari SLM ACSI laser printer (68k/Atari)
696 0 = /dev/slm0 First SLM laser printer
697 1 = /dev/slm1 Second SLM laser printer
698 ...
699 28 block Fourth Matsushita (Panasonic/SoundBlaster) CD-ROM
700 0 = /dev/sbpcd12 Panasonic CD-ROM controller 3 unit 0
701 1 = /dev/sbpcd13 Panasonic CD-ROM controller 3 unit 1
702 2 = /dev/sbpcd14 Panasonic CD-ROM controller 3 unit 2
703 3 = /dev/sbpcd15 Panasonic CD-ROM controller 3 unit 3
30aaa5c6 704
1da177e4
LT		 705 28 block ACSI disk (68k/Atari)
706 0 = /dev/ada First ACSI disk whole disk
707 16 = /dev/adb Second ACSI disk whole disk
708 32 = /dev/adc Third ACSI disk whole disk
709 ...
710 240 = /dev/adp 16th ACSI disk whole disk
711
712 Partitions are handled in the same way as for IDE
713 disks (see major number 3) except that the limit on
714 partitions is 15, like SCSI.
715
716 29 char Universal frame buffer
717 0 = /dev/fb0 First frame buffer
718 1 = /dev/fb1 Second frame buffer
719 ...
720 31 = /dev/fb31 32nd frame buffer
721
722 29 block Aztech/Orchid/Okano/Wearnes CD-ROM
723 0 = /dev/aztcd Aztech CD-ROM
724
725 30 char iBCS-2 compatibility devices
726 0 = /dev/socksys Socket access
727 1 = /dev/spx SVR3 local X interface
728 32 = /dev/inet/ip Network access
729 33 = /dev/inet/icmp
730 34 = /dev/inet/ggp
731 35 = /dev/inet/ipip
732 36 = /dev/inet/tcp
733 37 = /dev/inet/egp
734 38 = /dev/inet/pup
735 39 = /dev/inet/udp
736 40 = /dev/inet/idp
737 41 = /dev/inet/rawip
738
739 Additionally, iBCS-2 requires the following links:
740
741 /dev/ip -> /dev/inet/ip
742 /dev/icmp -> /dev/inet/icmp
743 /dev/ggp -> /dev/inet/ggp
744 /dev/ipip -> /dev/inet/ipip
745 /dev/tcp -> /dev/inet/tcp
746 /dev/egp -> /dev/inet/egp
747 /dev/pup -> /dev/inet/pup
748 /dev/udp -> /dev/inet/udp
749 /dev/idp -> /dev/inet/idp
750 /dev/rawip -> /dev/inet/rawip
751 /dev/inet/arp -> /dev/inet/udp
752 /dev/inet/rip -> /dev/inet/udp
753 /dev/nfsd -> /dev/socksys
754 /dev/X0R -> /dev/null (? apparently not required ?)
755
756 30 block Philips LMS CM-205 CD-ROM
757 0 = /dev/cm205cd Philips LMS CM-205 CD-ROM
758
759 /dev/lmscd is an older name for this device. This
760 driver does not work with the CM-205MS CD-ROM.
761
762 31 char MPU-401 MIDI
763 0 = /dev/mpu401data MPU-401 data port
764 1 = /dev/mpu401stat MPU-401 status port
30aaa5c6 765
1da177e4
LT		 766 31 block ROM/flash memory card
767 0 = /dev/rom0 First ROM card (rw)
768 ...
769 7 = /dev/rom7 Eighth ROM card (rw)
770 8 = /dev/rrom0 First ROM card (ro)
771 ...
772 15 = /dev/rrom7 Eighth ROM card (ro)
773 16 = /dev/flash0 First flash memory card (rw)
774 ...
775 23 = /dev/flash7 Eighth flash memory card (rw)
776 24 = /dev/rflash0 First flash memory card (ro)
777 ...
778 31 = /dev/rflash7 Eighth flash memory card (ro)
779
780 The read-write (rw) devices support back-caching
781 written data in RAM, as well as writing to flash RAM
782 devices. The read-only devices (ro) support reading
783 only.
784
785 32 char Specialix serial card
786 0 = /dev/ttyX0 First Specialix port
787 1 = /dev/ttyX1 Second Specialix port
788 ...
789 32 block Philips LMS CM-206 CD-ROM
790 0 = /dev/cm206cd Philips LMS CM-206 CD-ROM
791
792 33 char Specialix serial card - alternate devices
793 0 = /dev/cux0 Callout device for ttyX0
794 1 = /dev/cux1 Callout device for ttyX1
795 ...
796 33 block Third IDE hard disk/CD-ROM interface
797 0 = /dev/hde Master: whole disk (or CD-ROM)
798 64 = /dev/hdf Slave: whole disk (or CD-ROM)
799
800 Partitions are handled the same way as for the first
801 interface (see major number 3).
802
803 34 char Z8530 HDLC driver
804 0 = /dev/scc0 First Z8530, first port
805 1 = /dev/scc1 First Z8530, second port
806 2 = /dev/scc2 Second Z8530, first port
807 3 = /dev/scc3 Second Z8530, second port
808 ...
809
810 In a previous version these devices were named
811 /dev/sc1 for /dev/scc0, /dev/sc2 for /dev/scc1, and so
812 on.
813
814 34 block Fourth IDE hard disk/CD-ROM interface
815 0 = /dev/hdg Master: whole disk (or CD-ROM)
816 64 = /dev/hdh Slave: whole disk (or CD-ROM)
30aaa5c6 817
1da177e4
LT		 818 Partitions are handled the same way as for the first
819 interface (see major number 3).
820
821 35 char tclmidi MIDI driver
822 0 = /dev/midi0 First MIDI port, kernel timed
823 1 = /dev/midi1 Second MIDI port, kernel timed
824 2 = /dev/midi2 Third MIDI port, kernel timed
825 3 = /dev/midi3 Fourth MIDI port, kernel timed
826 64 = /dev/rmidi0 First MIDI port, untimed
827 65 = /dev/rmidi1 Second MIDI port, untimed
828 66 = /dev/rmidi2 Third MIDI port, untimed
829 67 = /dev/rmidi3 Fourth MIDI port, untimed
830 128 = /dev/smpte0 First MIDI port, SMPTE timed
831 129 = /dev/smpte1 Second MIDI port, SMPTE timed
832 130 = /dev/smpte2 Third MIDI port, SMPTE timed
833 131 = /dev/smpte3 Fourth MIDI port, SMPTE timed
30aaa5c6 834
1da177e4
LT		 835 35 block Slow memory ramdisk
836 0 = /dev/slram Slow memory ramdisk
837
838 36 char Netlink support
839 0 = /dev/route Routing, device updates, kernel to user
840 1 = /dev/skip enSKIP security cache control
841 3 = /dev/fwmonitor Firewall packet copies
842 16 = /dev/tap0 First Ethertap device
843 ...
844 31 = /dev/tap15 16th Ethertap device
30aaa5c6 845
bb8187d3 846 36 block OBSOLETE (was MCA ESDI hard disk)
1da177e4
LT		 847
848 37 char IDE tape
849 0 = /dev/ht0 First IDE tape
850 1 = /dev/ht1 Second IDE tape
851 ...
852 128 = /dev/nht0 First IDE tape, no rewind-on-close
853 129 = /dev/nht1 Second IDE tape, no rewind-on-close
854 ...
855
856 Currently, only one IDE tape drive is supported.
857
858 37 block Zorro II ramdisk
859 0 = /dev/z2ram Zorro II ramdisk
860
861 38 char Myricom PCI Myrinet board
862 0 = /dev/mlanai0 First Myrinet board
863 1 = /dev/mlanai1 Second Myrinet board
864 ...
865
866 This device is used for status query, board control
867 and "user level packet I/O." This board is also
868 accessible as a standard networking "eth" device.
869
04c860c1 870 38 block OBSOLETE (was Linux/AP+)
1da177e4
LT		 871
872 39 char ML-16P experimental I/O board
873 0 = /dev/ml16pa-a0 First card, first analog channel
874 1 = /dev/ml16pa-a1 First card, second analog channel
875 ...
876 15 = /dev/ml16pa-a15 First card, 16th analog channel
877 16 = /dev/ml16pa-d First card, digital lines
878 17 = /dev/ml16pa-c0 First card, first counter/timer
879 18 = /dev/ml16pa-c1 First card, second counter/timer
880 19 = /dev/ml16pa-c2 First card, third counter/timer
881 32 = /dev/ml16pb-a0 Second card, first analog channel
882 33 = /dev/ml16pb-a1 Second card, second analog channel
883 ...
884 47 = /dev/ml16pb-a15 Second card, 16th analog channel
885 48 = /dev/ml16pb-d Second card, digital lines
886 49 = /dev/ml16pb-c0 Second card, first counter/timer
887 50 = /dev/ml16pb-c1 Second card, second counter/timer
888 51 = /dev/ml16pb-c2 Second card, third counter/timer
889 ...
04c860c1 890 39 block
1da177e4 891
04c860c1 892 40 char
30aaa5c6 893
04c860c1 894 40 block
1da177e4
LT		 895
896 41 char Yet Another Micro Monitor
897 0 = /dev/yamm Yet Another Micro Monitor
30aaa5c6 898
04c860c1 899 41 block
1da177e4
LT		 900
901 42 char Demo/sample use
30aaa5c6 902
1da177e4
LT		 903 42 block Demo/sample use
904
905 This number is intended for use in sample code, as
906 well as a general "example" device number. It
907 should never be used for a device driver that is being
908 distributed; either obtain an official number or use
909 the local/experimental range. The sudden addition or
910 removal of a driver with this number should not cause
911 ill effects to the system (bugs excepted.)
912
913 IN PARTICULAR, ANY DISTRIBUTION WHICH CONTAINS A
914 DEVICE DRIVER USING MAJOR NUMBER 42 IS NONCOMPLIANT.
915
916 43 char isdn4linux virtual modem
917 0 = /dev/ttyI0 First virtual modem
918 ...
919 63 = /dev/ttyI63 64th virtual modem
30aaa5c6 920
1da177e4
LT		 921 43 block Network block devices
922 0 = /dev/nb0 First network block device
923 1 = /dev/nb1 Second network block device
924 ...
925
926 Network Block Device is somehow similar to loopback
927 devices: If you read from it, it sends packet across
928 network asking server for data. If you write to it, it
929 sends packet telling server to write. It could be used
930 to mounting filesystems over the net, swapping over
931 the net, implementing block device in userland etc.
932
933 44 char isdn4linux virtual modem - alternate devices
934 0 = /dev/cui0 Callout device for ttyI0
935 ...
936 63 = /dev/cui63 Callout device for ttyI63
30aaa5c6 937
1da177e4
LT		 938 44 block Flash Translation Layer (FTL) filesystems
939 0 = /dev/ftla FTL on first Memory Technology Device
940 16 = /dev/ftlb FTL on second Memory Technology Device
941 32 = /dev/ftlc FTL on third Memory Technology Device
942 ...
30aaa5c6 943 240 = /dev/ftlp FTL on 16th Memory Technology Device
1da177e4
LT		 944
945 Partitions are handled in the same way as for IDE
11420211 946 disks (see major number 3) except that the partition
1da177e4
LT		 947 limit is 15 rather than 63 per disk (same as SCSI.)
948
949 45 char isdn4linux ISDN BRI driver
950 0 = /dev/isdn0 First virtual B channel raw data
951 ...
952 63 = /dev/isdn63 64th virtual B channel raw data
953 64 = /dev/isdnctrl0 First channel control/debug
954 ...
955 127 = /dev/isdnctrl63 64th channel control/debug
956
957 128 = /dev/ippp0 First SyncPPP device
958 ...
959 191 = /dev/ippp63 64th SyncPPP device
960
961 255 = /dev/isdninfo ISDN monitor interface
30aaa5c6 962
1da177e4
LT		 963 45 block Parallel port IDE disk devices
964 0 = /dev/pda First parallel port IDE disk
965 16 = /dev/pdb Second parallel port IDE disk
966 32 = /dev/pdc Third parallel port IDE disk
967 48 = /dev/pdd Fourth parallel port IDE disk
968
969 Partitions are handled in the same way as for IDE
970 disks (see major number 3) except that the partition
971 limit is 15 rather than 63 per disk.
972
973 46 char Comtrol Rocketport serial card
974 0 = /dev/ttyR0 First Rocketport port
975 1 = /dev/ttyR1 Second Rocketport port
976 ...
977 46 block Parallel port ATAPI CD-ROM devices
978 0 = /dev/pcd0 First parallel port ATAPI CD-ROM
979 1 = /dev/pcd1 Second parallel port ATAPI CD-ROM
980 2 = /dev/pcd2 Third parallel port ATAPI CD-ROM
981 3 = /dev/pcd3 Fourth parallel port ATAPI CD-ROM
982
983 47 char Comtrol Rocketport serial card - alternate devices
984 0 = /dev/cur0 Callout device for ttyR0
985 1 = /dev/cur1 Callout device for ttyR1
986 ...
987 47 block Parallel port ATAPI disk devices
988 0 = /dev/pf0 First parallel port ATAPI disk
989 1 = /dev/pf1 Second parallel port ATAPI disk
990 2 = /dev/pf2 Third parallel port ATAPI disk
991 3 = /dev/pf3 Fourth parallel port ATAPI disk
992
993 This driver is intended for floppy disks and similar
994 devices and hence does not support partitioning.
995
996 48 char SDL RISCom serial card
997 0 = /dev/ttyL0 First RISCom port
998 1 = /dev/ttyL1 Second RISCom port
999 ...
1000 48 block Mylex DAC960 PCI RAID controller; first controller
1001 0 = /dev/rd/c0d0 First disk, whole disk
1002 8 = /dev/rd/c0d1 Second disk, whole disk
1003 ...
1004 248 = /dev/rd/c0d31 32nd disk, whole disk
1005
1006 For partitions add:
1007 0 = /dev/rd/c?d? Whole disk
1008 1 = /dev/rd/c?d?p1 First partition
1009 ...
1010 7 = /dev/rd/c?d?p7 Seventh partition
1011
1012 49 char SDL RISCom serial card - alternate devices
1013 0 = /dev/cul0 Callout device for ttyL0
1014 1 = /dev/cul1 Callout device for ttyL1
1015 ...
1016 49 block Mylex DAC960 PCI RAID controller; second controller
1017 0 = /dev/rd/c1d0 First disk, whole disk
1018 8 = /dev/rd/c1d1 Second disk, whole disk
1019 ...
1020 248 = /dev/rd/c1d31 32nd disk, whole disk
1021
1022 Partitions are handled as for major 48.
1023
1024 50 char Reserved for GLINT
1025
1026 50 block Mylex DAC960 PCI RAID controller; third controller
1027 0 = /dev/rd/c2d0 First disk, whole disk
1028 8 = /dev/rd/c2d1 Second disk, whole disk
1029 ...
1030 248 = /dev/rd/c2d31 32nd disk, whole disk
1031
1032 51 char Baycom radio modem OR Radio Tech BIM-XXX-RS232 radio modem
1033 0 = /dev/bc0 First Baycom radio modem
1034 1 = /dev/bc1 Second Baycom radio modem
1035 ...
1036 51 block Mylex DAC960 PCI RAID controller; fourth controller
1037 0 = /dev/rd/c3d0 First disk, whole disk
1038 8 = /dev/rd/c3d1 Second disk, whole disk
1039 ...
1040 248 = /dev/rd/c3d31 32nd disk, whole disk
1041
1042 Partitions are handled as for major 48.
1043
1044 52 char Spellcaster DataComm/BRI ISDN card
1045 0 = /dev/dcbri0 First DataComm card
1046 1 = /dev/dcbri1 Second DataComm card
1047 2 = /dev/dcbri2 Third DataComm card
1048 3 = /dev/dcbri3 Fourth DataComm card
30aaa5c6 1049
1da177e4
LT		 1050 52 block Mylex DAC960 PCI RAID controller; fifth controller
1051 0 = /dev/rd/c4d0 First disk, whole disk
1052 8 = /dev/rd/c4d1 Second disk, whole disk
1053 ...
1054 248 = /dev/rd/c4d31 32nd disk, whole disk
1055
1056 Partitions are handled as for major 48.
1057
1058 53 char BDM interface for remote debugging MC683xx microcontrollers
1059 0 = /dev/pd_bdm0 PD BDM interface on lp0
1060 1 = /dev/pd_bdm1 PD BDM interface on lp1
1061 2 = /dev/pd_bdm2 PD BDM interface on lp2
1062 4 = /dev/icd_bdm0 ICD BDM interface on lp0
1063 5 = /dev/icd_bdm1 ICD BDM interface on lp1
1064 6 = /dev/icd_bdm2 ICD BDM interface on lp2
1065
1066 This device is used for the interfacing to the MC683xx
1067 microcontrollers via Background Debug Mode by use of a
1068 Parallel Port interface. PD is the Motorola Public
1069 Domain Interface and ICD is the commercial interface
1070 by P&E.
1071
1072 53 block Mylex DAC960 PCI RAID controller; sixth controller
1073 0 = /dev/rd/c5d0 First disk, whole disk
1074 8 = /dev/rd/c5d1 Second disk, whole disk
1075 ...
1076 248 = /dev/rd/c5d31 32nd disk, whole disk
1077
1078 Partitions are handled as for major 48.
1079
1080 54 char Electrocardiognosis Holter serial card
1081 0 = /dev/holter0 First Holter port
1082 1 = /dev/holter1 Second Holter port
1083 2 = /dev/holter2 Third Holter port
1084
1085 A custom serial card used by Electrocardiognosis SRL
1086 <mseritan@ottonel.pub.ro> to transfer data from Holter
1087 24-hour heart monitoring equipment.
1088
1089 54 block Mylex DAC960 PCI RAID controller; seventh controller
1090 0 = /dev/rd/c6d0 First disk, whole disk
1091 8 = /dev/rd/c6d1 Second disk, whole disk
1092 ...
1093 248 = /dev/rd/c6d31 32nd disk, whole disk
1094
1095 Partitions are handled as for major 48.
1096
1097 55 char DSP56001 digital signal processor
1098 0 = /dev/dsp56k First DSP56001
30aaa5c6 1099
5d3f083d 1100 55 block Mylex DAC960 PCI RAID controller; eighth controller
1da177e4
LT		 1101 0 = /dev/rd/c7d0 First disk, whole disk
1102 8 = /dev/rd/c7d1 Second disk, whole disk
1103 ...
1104 248 = /dev/rd/c7d31 32nd disk, whole disk
1105
1106 Partitions are handled as for major 48.
1107
1108 56 char Apple Desktop Bus
1109 0 = /dev/adb ADB bus control
1110
1111 Additional devices will be added to this number, all
1112 starting with /dev/adb.
1113
1114 56 block Fifth IDE hard disk/CD-ROM interface
1115 0 = /dev/hdi Master: whole disk (or CD-ROM)
1116 64 = /dev/hdj Slave: whole disk (or CD-ROM)
1117
1118 Partitions are handled the same way as for the first
1119 interface (see major number 3).
1120
1121 57 char Hayes ESP serial card
1122 0 = /dev/ttyP0 First ESP port
1123 1 = /dev/ttyP1 Second ESP port
1124 ...
1125
1126 57 block Sixth IDE hard disk/CD-ROM interface
1127 0 = /dev/hdk Master: whole disk (or CD-ROM)
1128 64 = /dev/hdl Slave: whole disk (or CD-ROM)
1129
1130 Partitions are handled the same way as for the first
1131 interface (see major number 3).
1132
1133 58 char Hayes ESP serial card - alternate devices
1134 0 = /dev/cup0 Callout device for ttyP0
1135 1 = /dev/cup1 Callout device for ttyP1
1136 ...
30aaa5c6 1137
1da177e4
LT		 1138 58 block Reserved for logical volume manager
1139
1140 59 char sf firewall package
1141 0 = /dev/firewall Communication with sf kernel module
1142
1143 59 block Generic PDA filesystem device
1144 0 = /dev/pda0 First PDA device
1145 1 = /dev/pda1 Second PDA device
1146 ...
1147
1148 The pda devices are used to mount filesystems on
1149 remote pda's (basically slow handheld machines with
1150 proprietary OS's and limited memory and storage
1151 running small fs translation drivers) through serial /
1152 IRDA / parallel links.
1153
1154 NAMING CONFLICT -- PROPOSED REVISED NAME /dev/rpda0 etc
1155
1156 60-63 char LOCAL/EXPERIMENTAL USE
30aaa5c6 1157
1da177e4
LT		 1158 60-63 block LOCAL/EXPERIMENTAL USE
1159 Allocated for local/experimental use. For devices not
1160 assigned official numbers, these ranges should be
1161 used in order to avoid conflicting with future assignments.
1162
1163 64 char ENskip kernel encryption package
1164 0 = /dev/enskip Communication with ENskip kernel module
1165
1166 64 block Scramdisk/DriveCrypt encrypted devices
1167 0 = /dev/scramdisk/master Master node for ioctls
1168 1 = /dev/scramdisk/1 First encrypted device
1169 2 = /dev/scramdisk/2 Second encrypted device
1170 ...
1171 255 = /dev/scramdisk/255 255th encrypted device
1172
1173 The filename of the encrypted container and the passwords
1174 are sent via ioctls (using the sdmount tool) to the master
1175 node which then activates them via one of the
11420211 1176 /dev/scramdisk/x nodes for loop mounting (all handled
1da177e4
LT		 1177 through the sdmount tool).
1178
1179 Requested by: andy@scramdisklinux.org
1180
1181 65 char Sundance "plink" Transputer boards (obsolete, unused)
1182 0 = /dev/plink0 First plink device
1183 1 = /dev/plink1 Second plink device
1184 2 = /dev/plink2 Third plink device
1185 3 = /dev/plink3 Fourth plink device
1186 64 = /dev/rplink0 First plink device, raw
1187 65 = /dev/rplink1 Second plink device, raw
1188 66 = /dev/rplink2 Third plink device, raw
1189 67 = /dev/rplink3 Fourth plink device, raw
1190 128 = /dev/plink0d First plink device, debug
1191 129 = /dev/plink1d Second plink device, debug
1192 130 = /dev/plink2d Third plink device, debug
1193 131 = /dev/plink3d Fourth plink device, debug
1194 192 = /dev/rplink0d First plink device, raw, debug
1195 193 = /dev/rplink1d Second plink device, raw, debug
1196 194 = /dev/rplink2d Third plink device, raw, debug
1197 195 = /dev/rplink3d Fourth plink device, raw, debug
1198
1199 This is a commercial driver; contact James Howes
1200 <jth@prosig.demon.co.uk> for information.
1201
1202 65 block SCSI disk devices (16-31)
1203 0 = /dev/sdq 17th SCSI disk whole disk
1204 16 = /dev/sdr 18th SCSI disk whole disk
1205 32 = /dev/sds 19th SCSI disk whole disk
1206 ...
1207 240 = /dev/sdaf 32nd SCSI disk whole disk
1208
1209 Partitions are handled in the same way as for IDE
1210 disks (see major number 3) except that the limit on
1211 partitions is 15.
1212
1213 66 char YARC PowerPC PCI coprocessor card
1214 0 = /dev/yppcpci0 First YARC card
1215 1 = /dev/yppcpci1 Second YARC card
1216 ...
1217
1218 66 block SCSI disk devices (32-47)
1219 0 = /dev/sdag 33th SCSI disk whole disk
1220 16 = /dev/sdah 34th SCSI disk whole disk
1221 32 = /dev/sdai 35th SCSI disk whole disk
1222 ...
1223 240 = /dev/sdav 48nd SCSI disk whole disk
1224
1225 Partitions are handled in the same way as for IDE
1226 disks (see major number 3) except that the limit on
1227 partitions is 15.
1228
1229 67 char Coda network file system
1230 0 = /dev/cfs0 Coda cache manager
1231
1232 See http://www.coda.cs.cmu.edu for information about Coda.
1233
1234 67 block SCSI disk devices (48-63)
1235 0 = /dev/sdaw 49th SCSI disk whole disk
1236 16 = /dev/sdax 50th SCSI disk whole disk
1237 32 = /dev/sday 51st SCSI disk whole disk
1238 ...
1239 240 = /dev/sdbl 64th SCSI disk whole disk
1240
1241 Partitions are handled in the same way as for IDE
1242 disks (see major number 3) except that the limit on
1243 partitions is 15.
1244
1245 68 char CAPI 2.0 interface
1246 0 = /dev/capi20 Control device
1247 1 = /dev/capi20.00 First CAPI 2.0 application
1248 2 = /dev/capi20.01 Second CAPI 2.0 application
1249 ...
1250 20 = /dev/capi20.19 19th CAPI 2.0 application
1251
1252 ISDN CAPI 2.0 driver for use with CAPI 2.0
1253 applications; currently supports the AVM B1 card.
1254
1255 68 block SCSI disk devices (64-79)
1256 0 = /dev/sdbm 65th SCSI disk whole disk
1257 16 = /dev/sdbn 66th SCSI disk whole disk
1258 32 = /dev/sdbo 67th SCSI disk whole disk
1259 ...
1260 240 = /dev/sdcb 80th SCSI disk whole disk
1261
1262 Partitions are handled in the same way as for IDE
1263 disks (see major number 3) except that the limit on
1264 partitions is 15.
1265
1266 69 char MA16 numeric accelerator card
1267 0 = /dev/ma16 Board memory access
1268
1269 69 block SCSI disk devices (80-95)
1270 0 = /dev/sdcc 81st SCSI disk whole disk
1271 16 = /dev/sdcd 82nd SCSI disk whole disk
1272 32 = /dev/sdce 83th SCSI disk whole disk
1273 ...
1274 240 = /dev/sdcr 96th SCSI disk whole disk
1275
1276 Partitions are handled in the same way as for IDE
1277 disks (see major number 3) except that the limit on
1278 partitions is 15.
1279
1280 70 char SpellCaster Protocol Services Interface
1281 0 = /dev/apscfg Configuration interface
1282 1 = /dev/apsauth Authentication interface
1283 2 = /dev/apslog Logging interface
1284 3 = /dev/apsdbg Debugging interface
1285 64 = /dev/apsisdn ISDN command interface
1286 65 = /dev/apsasync Async command interface
1287 128 = /dev/apsmon Monitor interface
1288
1289 70 block SCSI disk devices (96-111)
1290 0 = /dev/sdcs 97th SCSI disk whole disk
1291 16 = /dev/sdct 98th SCSI disk whole disk
1292 32 = /dev/sdcu 99th SCSI disk whole disk
1293 ...
1294 240 = /dev/sddh 112nd SCSI disk whole disk
1295
1296 Partitions are handled in the same way as for IDE
1297 disks (see major number 3) except that the limit on
1298 partitions is 15.
1299
1300 71 char Computone IntelliPort II serial card
1301 0 = /dev/ttyF0 IntelliPort II board 0, port 0
1302 1 = /dev/ttyF1 IntelliPort II board 0, port 1
1303 ...
1304 63 = /dev/ttyF63 IntelliPort II board 0, port 63
1305 64 = /dev/ttyF64 IntelliPort II board 1, port 0
1306 65 = /dev/ttyF65 IntelliPort II board 1, port 1
1307 ...
1308 127 = /dev/ttyF127 IntelliPort II board 1, port 63
1309 128 = /dev/ttyF128 IntelliPort II board 2, port 0
1310 129 = /dev/ttyF129 IntelliPort II board 2, port 1
1311 ...
1312 191 = /dev/ttyF191 IntelliPort II board 2, port 63
1313 192 = /dev/ttyF192 IntelliPort II board 3, port 0
1314 193 = /dev/ttyF193 IntelliPort II board 3, port 1
1315 ...
1316 255 = /dev/ttyF255 IntelliPort II board 3, port 63
1317
1318 71 block SCSI disk devices (112-127)
1319 0 = /dev/sddi 113th SCSI disk whole disk
1320 16 = /dev/sddj 114th SCSI disk whole disk
1321 32 = /dev/sddk 115th SCSI disk whole disk
1322 ...
1323 240 = /dev/sddx 128th SCSI disk whole disk
1324
1325 Partitions are handled in the same way as for IDE
1326 disks (see major number 3) except that the limit on
1327 partitions is 15.
1328
1329 72 char Computone IntelliPort II serial card - alternate devices
1330 0 = /dev/cuf0 Callout device for ttyF0
1331 1 = /dev/cuf1 Callout device for ttyF1
1332 ...
1333 63 = /dev/cuf63 Callout device for ttyF63
1334 64 = /dev/cuf64 Callout device for ttyF64
1335 65 = /dev/cuf65 Callout device for ttyF65
1336 ...
1337 127 = /dev/cuf127 Callout device for ttyF127
1338 128 = /dev/cuf128 Callout device for ttyF128
1339 129 = /dev/cuf129 Callout device for ttyF129
1340 ...
1341 191 = /dev/cuf191 Callout device for ttyF191
1342 192 = /dev/cuf192 Callout device for ttyF192
1343 193 = /dev/cuf193 Callout device for ttyF193
1344 ...
1345 255 = /dev/cuf255 Callout device for ttyF255
1346
1347 72 block Compaq Intelligent Drive Array, first controller
1348 0 = /dev/ida/c0d0 First logical drive whole disk
1349 16 = /dev/ida/c0d1 Second logical drive whole disk
1350 ...
1351 240 = /dev/ida/c0d15 16th logical drive whole disk
1352
1353 Partitions are handled the same way as for Mylex
1354 DAC960 (see major number 48) except that the limit on
1355 partitions is 15.
1356
1357 73 char Computone IntelliPort II serial card - control devices
1358 0 = /dev/ip2ipl0 Loadware device for board 0
1359 1 = /dev/ip2stat0 Status device for board 0
1360 4 = /dev/ip2ipl1 Loadware device for board 1
1361 5 = /dev/ip2stat1 Status device for board 1
1362 8 = /dev/ip2ipl2 Loadware device for board 2
1363 9 = /dev/ip2stat2 Status device for board 2
1364 12 = /dev/ip2ipl3 Loadware device for board 3
1365 13 = /dev/ip2stat3 Status device for board 3
1366
1367 73 block Compaq Intelligent Drive Array, second controller
1368 0 = /dev/ida/c1d0 First logical drive whole disk
1369 16 = /dev/ida/c1d1 Second logical drive whole disk
1370 ...
1371 240 = /dev/ida/c1d15 16th logical drive whole disk
1372
1373 Partitions are handled the same way as for Mylex
1374 DAC960 (see major number 48) except that the limit on
1375 partitions is 15.
1376
1377 74 char SCI bridge
1378 0 = /dev/SCI/0 SCI device 0
1379 1 = /dev/SCI/1 SCI device 1
1380 ...
1381
1382 Currently for Dolphin Interconnect Solutions' PCI-SCI
1383 bridge.
1384
1385 74 block Compaq Intelligent Drive Array, third controller
1386 0 = /dev/ida/c2d0 First logical drive whole disk
1387 16 = /dev/ida/c2d1 Second logical drive whole disk
1388 ...
1389 240 = /dev/ida/c2d15 16th logical drive whole disk
1390
1391 Partitions are handled the same way as for Mylex
1392 DAC960 (see major number 48) except that the limit on
1393 partitions is 15.
1394
1395 75 char Specialix IO8+ serial card
1396 0 = /dev/ttyW0 First IO8+ port, first card
1397 1 = /dev/ttyW1 Second IO8+ port, first card
1398 ...
1399 8 = /dev/ttyW8 First IO8+ port, second card
1400 ...
1401
1402 75 block Compaq Intelligent Drive Array, fourth controller
1403 0 = /dev/ida/c3d0 First logical drive whole disk
1404 16 = /dev/ida/c3d1 Second logical drive whole disk
1405 ...
1406 240 = /dev/ida/c3d15 16th logical drive whole disk
1407
1408 Partitions are handled the same way as for Mylex
1409 DAC960 (see major number 48) except that the limit on
1410 partitions is 15.
1411
1412 76 char Specialix IO8+ serial card - alternate devices
1413 0 = /dev/cuw0 Callout device for ttyW0
1414 1 = /dev/cuw1 Callout device for ttyW1
1415 ...
1416 8 = /dev/cuw8 Callout device for ttyW8
1417 ...
1418
1419 76 block Compaq Intelligent Drive Array, fifth controller
1420 0 = /dev/ida/c4d0 First logical drive whole disk
1421 16 = /dev/ida/c4d1 Second logical drive whole disk
1422 ...
1423 240 = /dev/ida/c4d15 16th logical drive whole disk
1424
1425 Partitions are handled the same way as for Mylex
1426 DAC960 (see major number 48) except that the limit on
1427 partitions is 15.
1428
1429
1430 77 char ComScire Quantum Noise Generator
1431 0 = /dev/qng ComScire Quantum Noise Generator
1432
1433 77 block Compaq Intelligent Drive Array, sixth controller
1434 0 = /dev/ida/c5d0 First logical drive whole disk
1435 16 = /dev/ida/c5d1 Second logical drive whole disk
1436 ...
1437 240 = /dev/ida/c5d15 16th logical drive whole disk
1438
1439 Partitions are handled the same way as for Mylex
1440 DAC960 (see major number 48) except that the limit on
1441 partitions is 15.
1442
1da177e4
LT		 1443 78 char PAM Software's multimodem boards
1444 0 = /dev/ttyM0 First PAM modem
1445 1 = /dev/ttyM1 Second PAM modem
1446 ...
1447
1448 78 block Compaq Intelligent Drive Array, seventh controller
1449 0 = /dev/ida/c6d0 First logical drive whole disk
1450 16 = /dev/ida/c6d1 Second logical drive whole disk
1451 ...
1452 240 = /dev/ida/c6d15 16th logical drive whole disk
1453
1454 Partitions are handled the same way as for Mylex
1455 DAC960 (see major number 48) except that the limit on
1456 partitions is 15.
1457
1da177e4
LT		 1458 79 char PAM Software's multimodem boards - alternate devices
1459 0 = /dev/cum0 Callout device for ttyM0
1460 1 = /dev/cum1 Callout device for ttyM1
1461 ...
1462
5d3f083d 1463 79 block Compaq Intelligent Drive Array, eighth controller
1da177e4
LT		 1464 0 = /dev/ida/c7d0 First logical drive whole disk
1465 16 = /dev/ida/c7d1 Second logical drive whole disk
1466 ...
1467 240 = /dev/ida/c715 16th logical drive whole disk
1468
1469 Partitions are handled the same way as for Mylex
1470 DAC960 (see major number 48) except that the limit on
1471 partitions is 15.
1472
1da177e4
LT		 1473 80 char Photometrics AT200 CCD camera
1474 0 = /dev/at200 Photometrics AT200 CCD camera
1475
1476 80 block I2O hard disk
1477 0 = /dev/i2o/hda First I2O hard disk, whole disk
1478 16 = /dev/i2o/hdb Second I2O hard disk, whole disk
1479 ...
1480 240 = /dev/i2o/hdp 16th I2O hard disk, whole disk
1481
1482 Partitions are handled in the same way as for IDE
1483 disks (see major number 3) except that the limit on
1484 partitions is 15.
1485
1486 81 char video4linux
1487 0 = /dev/video0 Video capture/overlay device
1488 ...
1489 63 = /dev/video63 Video capture/overlay device
1490 64 = /dev/radio0 Radio device
1491 ...
1492 127 = /dev/radio63 Radio device
1da177e4
LT		 1493 224 = /dev/vbi0 Vertical blank interrupt
1494 ...
1495 255 = /dev/vbi31 Vertical blank interrupt
1496
1497 81 block I2O hard disk
1498 0 = /dev/i2o/hdq 17th I2O hard disk, whole disk
1499 16 = /dev/i2o/hdr 18th I2O hard disk, whole disk
1500 ...
1501 240 = /dev/i2o/hdaf 32nd I2O hard disk, whole disk
1502
1503 Partitions are handled in the same way as for IDE
1504 disks (see major number 3) except that the limit on
1505 partitions is 15.
1506
1507 82 char WiNRADiO communications receiver card
1508 0 = /dev/winradio0 First WiNRADiO card
1509 1 = /dev/winradio1 Second WiNRADiO card
1510 ...
1511
1512 The driver and documentation may be obtained from
0ea6e611 1513 http://www.winradio.com/
1da177e4
LT		 1514
1515 82 block I2O hard disk
1516 0 = /dev/i2o/hdag 33rd I2O hard disk, whole disk
1517 16 = /dev/i2o/hdah 34th I2O hard disk, whole disk
1518 ...
1519 240 = /dev/i2o/hdav 48th I2O hard disk, whole disk
1520
1521 Partitions are handled in the same way as for IDE
1522 disks (see major number 3) except that the limit on
1523 partitions is 15.
1524
1525 83 char Matrox mga_vid video driver
1526 0 = /dev/mga_vid0 1st video card
1527 1 = /dev/mga_vid1 2nd video card
1528 2 = /dev/mga_vid2 3rd video card
1529 ...
1530 15 = /dev/mga_vid15 16th video card
1531
1532 83 block I2O hard disk
1533 0 = /dev/i2o/hdaw 49th I2O hard disk, whole disk
1534 16 = /dev/i2o/hdax 50th I2O hard disk, whole disk
1535 ...
1536 240 = /dev/i2o/hdbl 64th I2O hard disk, whole disk
1537
1538 Partitions are handled in the same way as for IDE
1539 disks (see major number 3) except that the limit on
1540 partitions is 15.
1541
1542 84 char Ikon 1011[57] Versatec Greensheet Interface
1543 0 = /dev/ihcp0 First Greensheet port
1544 1 = /dev/ihcp1 Second Greensheet port
1545
1546 84 block I2O hard disk
1547 0 = /dev/i2o/hdbm 65th I2O hard disk, whole disk
1548 16 = /dev/i2o/hdbn 66th I2O hard disk, whole disk
1549 ...
1550 240 = /dev/i2o/hdcb 80th I2O hard disk, whole disk
1551
1552 Partitions are handled in the same way as for IDE
1553 disks (see major number 3) except that the limit on
1554 partitions is 15.
1555
1556 85 char Linux/SGI shared memory input queue
1557 0 = /dev/shmiq Master shared input queue
1558 1 = /dev/qcntl0 First device pushed
1559 2 = /dev/qcntl1 Second device pushed
1560 ...
1561
1562 85 block I2O hard disk
1563 0 = /dev/i2o/hdcc 81st I2O hard disk, whole disk
1564 16 = /dev/i2o/hdcd 82nd I2O hard disk, whole disk
1565 ...
1566 240 = /dev/i2o/hdcr 96th I2O hard disk, whole disk
1567
1568 Partitions are handled in the same way as for IDE
1569 disks (see major number 3) except that the limit on
1570 partitions is 15.
1571
1572 86 char SCSI media changer
1573 0 = /dev/sch0 First SCSI media changer
1574 1 = /dev/sch1 Second SCSI media changer
1575 ...
1576
1577 86 block I2O hard disk
1578 0 = /dev/i2o/hdcs 97th I2O hard disk, whole disk
1579 16 = /dev/i2o/hdct 98th I2O hard disk, whole disk
1580 ...
1581 240 = /dev/i2o/hddh 112th I2O hard disk, whole disk
1582
1583 Partitions are handled in the same way as for IDE
1584 disks (see major number 3) except that the limit on
1585 partitions is 15.
1586
1587 87 char Sony Control-A1 stereo control bus
1588 0 = /dev/controla0 First device on chain
1589 1 = /dev/controla1 Second device on chain
1590 ...
1591
1592 87 block I2O hard disk
1593 0 = /dev/i2o/hddi 113rd I2O hard disk, whole disk
1594 16 = /dev/i2o/hddj 114th I2O hard disk, whole disk
1595 ...
1596 240 = /dev/i2o/hddx 128th I2O hard disk, whole disk
1597
1598 Partitions are handled in the same way as for IDE
1599 disks (see major number 3) except that the limit on
1600 partitions is 15.
1601
1602 88 char COMX synchronous serial card
1603 0 = /dev/comx0 COMX channel 0
1604 1 = /dev/comx1 COMX channel 1
1605 ...
1606
1607 88 block Seventh IDE hard disk/CD-ROM interface
1608 0 = /dev/hdm Master: whole disk (or CD-ROM)
1609 64 = /dev/hdn Slave: whole disk (or CD-ROM)
1610
1611 Partitions are handled the same way as for the first
1612 interface (see major number 3).
1613
1614 89 char I2C bus interface
1615 0 = /dev/i2c-0 First I2C adapter
1616 1 = /dev/i2c-1 Second I2C adapter
1617 ...
1618
1619 89 block Eighth IDE hard disk/CD-ROM interface
1620 0 = /dev/hdo Master: whole disk (or CD-ROM)
1621 64 = /dev/hdp Slave: whole disk (or CD-ROM)
1622
1623 Partitions are handled the same way as for the first
1624 interface (see major number 3).
1625
1626 90 char Memory Technology Device (RAM, ROM, Flash)
1627 0 = /dev/mtd0 First MTD (rw)
1628 1 = /dev/mtdr0 First MTD (ro)
1629 ...
1630 30 = /dev/mtd15 16th MTD (rw)
1631 31 = /dev/mtdr15 16th MTD (ro)
1632
1633 90 block Ninth IDE hard disk/CD-ROM interface
1634 0 = /dev/hdq Master: whole disk (or CD-ROM)
1635 64 = /dev/hdr Slave: whole disk (or CD-ROM)
1636
1637 Partitions are handled the same way as for the first
1638 interface (see major number 3).
1639
1640 91 char CAN-Bus devices
1641 0 = /dev/can0 First CAN-Bus controller
1642 1 = /dev/can1 Second CAN-Bus controller
1643 ...
1644
1645 91 block Tenth IDE hard disk/CD-ROM interface
1646 0 = /dev/hds Master: whole disk (or CD-ROM)
1647 64 = /dev/hdt Slave: whole disk (or CD-ROM)
1648
1649 Partitions are handled the same way as for the first
1650 interface (see major number 3).
1651
1652 92 char Reserved for ith Kommunikationstechnik MIC ISDN card
1653
1654 92 block PPDD encrypted disk driver
1655 0 = /dev/ppdd0 First encrypted disk
1656 1 = /dev/ppdd1 Second encrypted disk
1657 ...
1658
1659 Partitions are handled in the same way as for IDE
1660 disks (see major number 3) except that the limit on
1661 partitions is 15.
1662
04c860c1 1663 93 char
1da177e4
LT		 1664
1665 93 block NAND Flash Translation Layer filesystem
1666 0 = /dev/nftla First NFTL layer
1667 16 = /dev/nftlb Second NFTL layer
1668 ...
1669 240 = /dev/nftlp 16th NTFL layer
1670
04c860c1 1671 94 char
1da177e4 1672
30aaa5c6 1673 94 block IBM S/390 DASD block storage
1da177e4
LT		 1674 0 = /dev/dasda First DASD device, major
1675 1 = /dev/dasda1 First DASD device, block 1
1676 2 = /dev/dasda2 First DASD device, block 2
1677 3 = /dev/dasda3 First DASD device, block 3
1678 4 = /dev/dasdb Second DASD device, major
1679 5 = /dev/dasdb1 Second DASD device, block 1
1680 6 = /dev/dasdb2 Second DASD device, block 2
1681 7 = /dev/dasdb3 Second DASD device, block 3
1682 ...
1683
1684 95 char IP filter
1685 0 = /dev/ipl Filter control device/log file
1686 1 = /dev/ipnat NAT control device/log file
1687 2 = /dev/ipstate State information log file
1688 3 = /dev/ipauth Authentication control device/log file
30aaa5c6 1689 ...
1da177e4
LT		 1690
1691 96 char Parallel port ATAPI tape devices
1692 0 = /dev/pt0 First parallel port ATAPI tape
1693 1 = /dev/pt1 Second parallel port ATAPI tape
1694 ...
1695 128 = /dev/npt0 First p.p. ATAPI tape, no rewind
1696 129 = /dev/npt1 Second p.p. ATAPI tape, no rewind
1697 ...
1698
30aaa5c6 1699 96 block Inverse NAND Flash Translation Layer
1da177e4
LT		 1700 0 = /dev/inftla First INFTL layer
1701 16 = /dev/inftlb Second INFTL layer
1702 ...
1703 240 = /dev/inftlp 16th INTFL layer
1704
1705 97 char Parallel port generic ATAPI interface
1706 0 = /dev/pg0 First parallel port ATAPI device
1707 1 = /dev/pg1 Second parallel port ATAPI device
1708 2 = /dev/pg2 Third parallel port ATAPI device
1709 3 = /dev/pg3 Fourth parallel port ATAPI device
1710
1711 These devices support the same API as the generic SCSI
1712 devices.
1713
1da177e4
LT		 1714 98 char Control and Measurement Device (comedi)
1715 0 = /dev/comedi0 First comedi device
1716 1 = /dev/comedi1 Second comedi device
1717 ...
1718
0ea6e611 1719 See http://stm.lbl.gov/comedi.
1da177e4
LT		 1720
1721 98 block User-mode virtual block device
1722 0 = /dev/ubda First user-mode block device
1723 16 = /dev/udbb Second user-mode block device
1724 ...
1725
1726 Partitions are handled in the same way as for IDE
1727 disks (see major number 3) except that the limit on
1728 partitions is 15.
1729
1730 This device is used by the user-mode virtual kernel port.
1731
1732 99 char Raw parallel ports
1733 0 = /dev/parport0 First parallel port
1734 1 = /dev/parport1 Second parallel port
1735 ...
1736
1737 99 block JavaStation flash disk
1738 0 = /dev/jsfd JavaStation flash disk
1739
1740100 char Telephony for Linux
1741 0 = /dev/phone0 First telephony device
1742 1 = /dev/phone1 Second telephony device
1743 ...
1744
1745101 char Motorola DSP 56xxx board
1746 0 = /dev/mdspstat Status information
1747 1 = /dev/mdsp1 First DSP board I/O controls
1748 ...
1749 16 = /dev/mdsp16 16th DSP board I/O controls
1750
1751101 block AMI HyperDisk RAID controller
1752 0 = /dev/amiraid/ar0 First array whole disk
1753 16 = /dev/amiraid/ar1 Second array whole disk
1754 ...
1755 240 = /dev/amiraid/ar15 16th array whole disk
1756
1757 For each device, partitions are added as:
1758 0 = /dev/amiraid/ar? Whole disk
1759 1 = /dev/amiraid/ar?p1 First partition
1760 2 = /dev/amiraid/ar?p2 Second partition
1761 ...
1762 15 = /dev/amiraid/ar?p15 15th partition
1763
04c860c1 1764102 char
1da177e4
LT		 1765
1766102 block Compressed block device
1767 0 = /dev/cbd/a First compressed block device, whole device
1768 16 = /dev/cbd/b Second compressed block device, whole device
1769 ...
1770 240 = /dev/cbd/p 16th compressed block device, whole device
1771
1772 Partitions are handled in the same way as for IDE
1773 disks (see major number 3) except that the limit on
1774 partitions is 15.
1775
1776103 char Arla network file system
1777 0 = /dev/nnpfs0 First NNPFS device
1778 1 = /dev/nnpfs1 Second NNPFS device
1779
1780 Arla is a free clone of the Andrew File System, AFS.
1781 The NNPFS device gives user mode filesystem
1782 implementations a kernel presence for caching and easy
1783 mounting. For more information about the project,
1784 write to <arla-drinkers@stacken.kth.se> or see
1785 http://www.stacken.kth.se/project/arla/
1786
1787103 block Audit device
1788 0 = /dev/audit Audit device
1789
1790104 char Flash BIOS support
1791
1792104 block Compaq Next Generation Drive Array, first controller
1793 0 = /dev/cciss/c0d0 First logical drive, whole disk
1794 16 = /dev/cciss/c0d1 Second logical drive, whole disk
1795 ...
1796 240 = /dev/cciss/c0d15 16th logical drive, whole disk
1797
1798 Partitions are handled the same way as for Mylex
1799 DAC960 (see major number 48) except that the limit on
1800 partitions is 15.
1801
1802105 char Comtrol VS-1000 serial controller
1803 0 = /dev/ttyV0 First VS-1000 port
1804 1 = /dev/ttyV1 Second VS-1000 port
1805 ...
1806
1807105 block Compaq Next Generation Drive Array, second controller
1808 0 = /dev/cciss/c1d0 First logical drive, whole disk
1809 16 = /dev/cciss/c1d1 Second logical drive, whole disk
1810 ...
1811 240 = /dev/cciss/c1d15 16th logical drive, whole disk
1812
1813 Partitions are handled the same way as for Mylex
1814 DAC960 (see major number 48) except that the limit on
1815 partitions is 15.
1816
1817106 char Comtrol VS-1000 serial controller - alternate devices
1818 0 = /dev/cuv0 First VS-1000 port
1819 1 = /dev/cuv1 Second VS-1000 port
1820 ...
1821
1822106 block Compaq Next Generation Drive Array, third controller
1823 0 = /dev/cciss/c2d0 First logical drive, whole disk
1824 16 = /dev/cciss/c2d1 Second logical drive, whole disk
1825 ...
1826 240 = /dev/cciss/c2d15 16th logical drive, whole disk
1827
1828 Partitions are handled the same way as for Mylex
1829 DAC960 (see major number 48) except that the limit on
1830 partitions is 15.
1831
1832107 char 3Dfx Voodoo Graphics device
1833 0 = /dev/3dfx Primary 3Dfx graphics device
1834
1835107 block Compaq Next Generation Drive Array, fourth controller
1836 0 = /dev/cciss/c3d0 First logical drive, whole disk
1837 16 = /dev/cciss/c3d1 Second logical drive, whole disk
1838 ...
1839 240 = /dev/cciss/c3d15 16th logical drive, whole disk
1840
1841 Partitions are handled the same way as for Mylex
1842 DAC960 (see major number 48) except that the limit on
1843 partitions is 15.
1844
1845108 char Device independent PPP interface
1846 0 = /dev/ppp Device independent PPP interface
1847
1848108 block Compaq Next Generation Drive Array, fifth controller
1849 0 = /dev/cciss/c4d0 First logical drive, whole disk
1850 16 = /dev/cciss/c4d1 Second logical drive, whole disk
1851 ...
1852 240 = /dev/cciss/c4d15 16th logical drive, whole disk
1853
1854 Partitions are handled the same way as for Mylex
1855 DAC960 (see major number 48) except that the limit on
1856 partitions is 15.
1857
1858109 char Reserved for logical volume manager
1859
1860109 block Compaq Next Generation Drive Array, sixth controller
1861 0 = /dev/cciss/c5d0 First logical drive, whole disk
1862 16 = /dev/cciss/c5d1 Second logical drive, whole disk
1863 ...
1864 240 = /dev/cciss/c5d15 16th logical drive, whole disk
1865
1866 Partitions are handled the same way as for Mylex
1867 DAC960 (see major number 48) except that the limit on
1868 partitions is 15.
1869
1870110 char miroMEDIA Surround board
1871 0 = /dev/srnd0 First miroMEDIA Surround board
1872 1 = /dev/srnd1 Second miroMEDIA Surround board
1873 ...
1874
1875110 block Compaq Next Generation Drive Array, seventh controller
1876 0 = /dev/cciss/c6d0 First logical drive, whole disk
1877 16 = /dev/cciss/c6d1 Second logical drive, whole disk
1878 ...
1879 240 = /dev/cciss/c6d15 16th logical drive, whole disk
1880
1881 Partitions are handled the same way as for Mylex
1882 DAC960 (see major number 48) except that the limit on
1883 partitions is 15.
1884
04c860c1 1885111 char
1da177e4 1886
5d3f083d 1887111 block Compaq Next Generation Drive Array, eighth controller
1da177e4
LT		 1888 0 = /dev/cciss/c7d0 First logical drive, whole disk
1889 16 = /dev/cciss/c7d1 Second logical drive, whole disk
1890 ...
1891 240 = /dev/cciss/c7d15 16th logical drive, whole disk
1892
1893 Partitions are handled the same way as for Mylex
1894 DAC960 (see major number 48) except that the limit on
1895 partitions is 15.
1896
1897112 char ISI serial card
1898 0 = /dev/ttyM0 First ISI port
1899 1 = /dev/ttyM1 Second ISI port
1900 ...
1901
1902 There is currently a device-naming conflict between
1903 these and PAM multimodems (major 78).
1904
1905112 block IBM iSeries virtual disk
1906 0 = /dev/iseries/vda First virtual disk, whole disk
1907 8 = /dev/iseries/vdb Second virtual disk, whole disk
1908 ...
1909 200 = /dev/iseries/vdz 26th virtual disk, whole disk
1910 208 = /dev/iseries/vdaa 27th virtual disk, whole disk
1911 ...
1912 248 = /dev/iseries/vdaf 32nd virtual disk, whole disk
1913
1914 Partitions are handled in the same way as for IDE
1915 disks (see major number 3) except that the limit on
1916 partitions is 7.
1917
1918113 char ISI serial card - alternate devices
1919 0 = /dev/cum0 Callout device for ttyM0
1920 1 = /dev/cum1 Callout device for ttyM1
1921 ...
1922
1923113 block IBM iSeries virtual CD-ROM
1da177e4
LT		 1924 0 = /dev/iseries/vcda First virtual CD-ROM
1925 1 = /dev/iseries/vcdb Second virtual CD-ROM
1926 ...
1927
1928114 char Picture Elements ISE board
1929 0 = /dev/ise0 First ISE board
1930 1 = /dev/ise1 Second ISE board
1931 ...
1932 128 = /dev/isex0 Control node for first ISE board
1933 129 = /dev/isex1 Control node for second ISE board
1934 ...
1935
1936 The ISE board is an embedded computer, optimized for
1937 image processing. The /dev/iseN nodes are the general
1938 I/O access to the board, the /dev/isex0 nodes command
1939 nodes used to control the board.
1940
1941114 block IDE BIOS powered software RAID interfaces such as the
1942 Promise Fastrak
1943
1944 0 = /dev/ataraid/d0
1945 1 = /dev/ataraid/d0p1
1946 2 = /dev/ataraid/d0p2
1947 ...
1948 16 = /dev/ataraid/d1
1949 17 = /dev/ataraid/d1p1
1950 18 = /dev/ataraid/d1p2
1951 ...
1952 255 = /dev/ataraid/d15p15
1953
1954 Partitions are handled in the same way as for IDE
1955 disks (see major number 3) except that the limit on
1956 partitions is 15.
1957
1958115 char TI link cable devices (115 was formerly the console driver speaker)
1959 0 = /dev/tipar0 Parallel cable on first parallel port
1960 ...
1961 7 = /dev/tipar7 Parallel cable on seventh parallel port
1962
1963 8 = /dev/tiser0 Serial cable on first serial port
1964 ...
1965 15 = /dev/tiser7 Serial cable on seventh serial port
1966
1967 16 = /dev/tiusb0 First USB cable
1968 ...
1969 47 = /dev/tiusb31 32nd USB cable
1970
1971115 block NetWare (NWFS) Devices (0-255)
1972
1973 The NWFS (NetWare) devices are used to present a
1974 collection of NetWare Mirror Groups or NetWare
1975 Partitions as a logical storage segment for
1976 use in mounting NetWare volumes. A maximum of
1977 256 NetWare volumes can be supported in a single
1978 machine.
1979
0ea6e611 1980 http://cgfa.telepac.pt/ftp2/kernel.org/linux/kernel/people/jmerkey/nwfs/
1da177e4
LT		 1981
1982 0 = /dev/nwfs/v0 First NetWare (NWFS) Logical Volume
1983 1 = /dev/nwfs/v1 Second NetWare (NWFS) Logical Volume
1984 2 = /dev/nwfs/v2 Third NetWare (NWFS) Logical Volume
1985 ...
1986 255 = /dev/nwfs/v255 Last NetWare (NWFS) Logical Volume
1987
1988116 char Advanced Linux Sound Driver (ALSA)
1989
1990116 block MicroMemory battery backed RAM adapter (NVRAM)
992caacf 1991 Supports 16 boards, 15 partitions each.
1da177e4
LT		 1992 Requested by neilb at cse.unsw.edu.au.
1993
1994 0 = /dev/umem/d0 Whole of first board
1995 1 = /dev/umem/d0p1 First partition of first board
1996 2 = /dev/umem/d0p2 Second partition of first board
1997 15 = /dev/umem/d0p15 15th partition of first board
1998
1999 16 = /dev/umem/d1 Whole of second board
2000 17 = /dev/umem/d1p1 First partition of second board
2001 ...
2002 255= /dev/umem/d15p15 15th partition of 16th board.
2003
2004117 char COSA/SRP synchronous serial card
2005 0 = /dev/cosa0c0 1st board, 1st channel
2006 1 = /dev/cosa0c1 1st board, 2nd channel
2007 ...
2008 16 = /dev/cosa1c0 2nd board, 1st channel
2009 17 = /dev/cosa1c1 2nd board, 2nd channel
2010 ...
2011
2012117 block Enterprise Volume Management System (EVMS)
2013
2014 The EVMS driver uses a layered, plug-in model to provide
2015 unparalleled flexibility and extensibility in managing
2016 storage. This allows for easy expansion or customization
2017 of various levels of volume management. Requested by
2018 Mark Peloquin (peloquin at us.ibm.com).
2019
2020 Note: EVMS populates and manages all the devnodes in
2021 /dev/evms.
2022
2023 http://sf.net/projects/evms
2024
2025 0 = /dev/evms/block_device EVMS block device
2026 1 = /dev/evms/legacyname1 First EVMS legacy device
2027 2 = /dev/evms/legacyname2 Second EVMS legacy device
2028 ...
2029 Both ranges can grow (down or up) until they meet.
2030 ...
2031 254 = /dev/evms/EVMSname2 Second EVMS native device
2032 255 = /dev/evms/EVMSname1 First EVMS native device
2033
2034 Note: legacyname(s) are derived from the normal legacy
2035 device names. For example, /dev/hda5 would become
2036 /dev/evms/hda5.
2037
2038118 char IBM Cryptographic Accelerator
2039 0 = /dev/ica Virtual interface to all IBM Crypto Accelerators
2040 1 = /dev/ica0 IBMCA Device 0
2041 2 = /dev/ica1 IBMCA Device 1
2042 ...
2043
2044119 char VMware virtual network control
04c860c1
AC		 2045 0 = /dev/vnet0 1st virtual network
2046 1 = /dev/vnet1 2nd virtual network
1da177e4
LT		 2047 ...
2048
2049120-127 char LOCAL/EXPERIMENTAL USE
30aaa5c6 2050
1da177e4
LT		 2051120-127 block LOCAL/EXPERIMENTAL USE
2052 Allocated for local/experimental use. For devices not
2053 assigned official numbers, these ranges should be
2054 used in order to avoid conflicting with future assignments.
2055
2056128-135 char Unix98 PTY masters
2057
2058 These devices should not have corresponding device
2059 nodes; instead they should be accessed through the
2060 /dev/ptmx cloning interface.
2061
1da177e4
LT		 2062128 block SCSI disk devices (128-143)
2063 0 = /dev/sddy 129th SCSI disk whole disk
2064 16 = /dev/sddz 130th SCSI disk whole disk
2065 32 = /dev/sdea 131th SCSI disk whole disk
2066 ...
2067 240 = /dev/sden 144th SCSI disk whole disk
2068
2069 Partitions are handled in the same way as for IDE
2070 disks (see major number 3) except that the limit on
2071 partitions is 15.
2072
1da177e4
LT		 2073129 block SCSI disk devices (144-159)
2074 0 = /dev/sdeo 145th SCSI disk whole disk
2075 16 = /dev/sdep 146th SCSI disk whole disk
2076 32 = /dev/sdeq 147th SCSI disk whole disk
2077 ...
2078 240 = /dev/sdfd 160th SCSI disk whole disk
2079
2080 Partitions are handled in the same way as for IDE
2081 disks (see major number 3) except that the limit on
2082 partitions is 15.
2083
2084130 char (Misc devices)
2085
2086130 block SCSI disk devices (160-175)
2087 0 = /dev/sdfe 161st SCSI disk whole disk
2088 16 = /dev/sdff 162nd SCSI disk whole disk
2089 32 = /dev/sdfg 163rd SCSI disk whole disk
2090 ...
2091 240 = /dev/sdft 176th SCSI disk whole disk
2092
2093 Partitions are handled in the same way as for IDE
2094 disks (see major number 3) except that the limit on
2095 partitions is 15.
2096
2097131 block SCSI disk devices (176-191)
2098 0 = /dev/sdfu 177th SCSI disk whole disk
2099 16 = /dev/sdfv 178th SCSI disk whole disk
2100 32 = /dev/sdfw 179th SCSI disk whole disk
2101 ...
2102 240 = /dev/sdgj 192nd SCSI disk whole disk
2103
2104 Partitions are handled in the same way as for IDE
2105 disks (see major number 3) except that the limit on
2106 partitions is 15.
2107
1da177e4
LT		 2108132 block SCSI disk devices (192-207)
2109 0 = /dev/sdgk 193rd SCSI disk whole disk
2110 16 = /dev/sdgl 194th SCSI disk whole disk
2111 32 = /dev/sdgm 195th SCSI disk whole disk
2112 ...
2113 240 = /dev/sdgz 208th SCSI disk whole disk
2114
2115 Partitions are handled in the same way as for IDE
2116 disks (see major number 3) except that the limit on
2117 partitions is 15.
2118
1da177e4
LT		 2119133 block SCSI disk devices (208-223)
2120 0 = /dev/sdha 209th SCSI disk whole disk
2121 16 = /dev/sdhb 210th SCSI disk whole disk
2122 32 = /dev/sdhc 211th SCSI disk whole disk
2123 ...
2124 240 = /dev/sdhp 224th SCSI disk whole disk
2125
2126 Partitions are handled in the same way as for IDE
2127 disks (see major number 3) except that the limit on
2128 partitions is 15.
2129
1da177e4
LT		 2130134 block SCSI disk devices (224-239)
2131 0 = /dev/sdhq 225th SCSI disk whole disk
2132 16 = /dev/sdhr 226th SCSI disk whole disk
2133 32 = /dev/sdhs 227th SCSI disk whole disk
2134 ...
2135 240 = /dev/sdif 240th SCSI disk whole disk
2136
2137 Partitions are handled in the same way as for IDE
2138 disks (see major number 3) except that the limit on
2139 partitions is 15.
2140
1da177e4
LT		 2141135 block SCSI disk devices (240-255)
2142 0 = /dev/sdig 241st SCSI disk whole disk
2143 16 = /dev/sdih 242nd SCSI disk whole disk
2144 32 = /dev/sdih 243rd SCSI disk whole disk
2145 ...
2146 240 = /dev/sdiv 256th SCSI disk whole disk
2147
2148 Partitions are handled in the same way as for IDE
2149 disks (see major number 3) except that the limit on
2150 partitions is 15.
2151
1da177e4
LT		 2152136-143 char Unix98 PTY slaves
2153 0 = /dev/pts/0 First Unix98 pseudo-TTY
01dd2fbf 2154 1 = /dev/pts/1 Second Unix98 pseudo-TTY
1da177e4
LT		 2155 ...
2156
2157 These device nodes are automatically generated with
2158 the proper permissions and modes by mounting the
2159 devpts filesystem onto /dev/pts with the appropriate
2160 mount options (distribution dependent, however, on
2161 *most* distributions the appropriate options are
2162 "mode=0620,gid=<gid of the "tty" group>".)
2163
2164136 block Mylex DAC960 PCI RAID controller; ninth controller
2165 0 = /dev/rd/c8d0 First disk, whole disk
2166 8 = /dev/rd/c8d1 Second disk, whole disk
2167 ...
2168 248 = /dev/rd/c8d31 32nd disk, whole disk
2169
2170 Partitions are handled as for major 48.
2171
2172137 block Mylex DAC960 PCI RAID controller; tenth controller
2173 0 = /dev/rd/c9d0 First disk, whole disk
2174 8 = /dev/rd/c9d1 Second disk, whole disk
2175 ...
2176 248 = /dev/rd/c9d31 32nd disk, whole disk
2177
2178 Partitions are handled as for major 48.
2179
2180138 block Mylex DAC960 PCI RAID controller; eleventh controller
2181 0 = /dev/rd/c10d0 First disk, whole disk
2182 8 = /dev/rd/c10d1 Second disk, whole disk
2183 ...
2184 248 = /dev/rd/c10d31 32nd disk, whole disk
2185
2186 Partitions are handled as for major 48.
2187
2188139 block Mylex DAC960 PCI RAID controller; twelfth controller
2189 0 = /dev/rd/c11d0 First disk, whole disk
2190 8 = /dev/rd/c11d1 Second disk, whole disk
2191 ...
2192 248 = /dev/rd/c11d31 32nd disk, whole disk
2193
2194 Partitions are handled as for major 48.
2195
2196140 block Mylex DAC960 PCI RAID controller; thirteenth controller
2197 0 = /dev/rd/c12d0 First disk, whole disk
2198 8 = /dev/rd/c12d1 Second disk, whole disk
2199 ...
2200 248 = /dev/rd/c12d31 32nd disk, whole disk
2201
2202 Partitions are handled as for major 48.
2203
2204141 block Mylex DAC960 PCI RAID controller; fourteenth controller
2205 0 = /dev/rd/c13d0 First disk, whole disk
2206 8 = /dev/rd/c13d1 Second disk, whole disk
2207 ...
2208 248 = /dev/rd/c13d31 32nd disk, whole disk
2209
2210 Partitions are handled as for major 48.
2211
2212142 block Mylex DAC960 PCI RAID controller; fifteenth controller
2213 0 = /dev/rd/c14d0 First disk, whole disk
2214 8 = /dev/rd/c14d1 Second disk, whole disk
2215 ...
2216 248 = /dev/rd/c14d31 32nd disk, whole disk
2217
2218 Partitions are handled as for major 48.
2219
2220143 block Mylex DAC960 PCI RAID controller; sixteenth controller
2221 0 = /dev/rd/c15d0 First disk, whole disk
2222 8 = /dev/rd/c15d1 Second disk, whole disk
2223 ...
2224 248 = /dev/rd/c15d31 32nd disk, whole disk
2225
2226 Partitions are handled as for major 48.
2227
2228144 char Encapsulated PPP
2229 0 = /dev/pppox0 First PPP over Ethernet
2230 ...
2231 63 = /dev/pppox63 64th PPP over Ethernet
2232
2233 This is primarily used for ADSL.
2234
2235 The SST 5136-DN DeviceNet interface driver has been
2236 relocated to major 183 due to an unfortunate conflict.
2237
2238144 block Expansion Area #1 for more non-device (e.g. NFS) mounts
2239 0 = mounted device 256
2240 255 = mounted device 511
2241
2242145 char SAM9407-based soundcard
2243 0 = /dev/sam0_mixer
2244 1 = /dev/sam0_sequencer
2245 2 = /dev/sam0_midi00
2246 3 = /dev/sam0_dsp
2247 4 = /dev/sam0_audio
2248 6 = /dev/sam0_sndstat
2249 18 = /dev/sam0_midi01
2250 34 = /dev/sam0_midi02
2251 50 = /dev/sam0_midi03
2252 64 = /dev/sam1_mixer
2253 ...
2254 128 = /dev/sam2_mixer
2255 ...
2256 192 = /dev/sam3_mixer
2257 ...
2258
2259 Device functions match OSS, but offer a number of
2260 addons, which are sam9407 specific. OSS can be
2261 operated simultaneously, taking care of the codec.
2262
2263145 block Expansion Area #2 for more non-device (e.g. NFS) mounts
2264 0 = mounted device 512
2265 255 = mounted device 767
2266
2267146 char SYSTRAM SCRAMNet mirrored-memory network
2268 0 = /dev/scramnet0 First SCRAMNet device
2269 1 = /dev/scramnet1 Second SCRAMNet device
2270 ...
2271
2272146 block Expansion Area #3 for more non-device (e.g. NFS) mounts
2273 0 = mounted device 768
2274 255 = mounted device 1023
2275
2276147 char Aureal Semiconductor Vortex Audio device
2277 0 = /dev/aureal0 First Aureal Vortex
2278 1 = /dev/aureal1 Second Aureal Vortex
2279 ...
2280
2281147 block Distributed Replicated Block Device (DRBD)
2282 0 = /dev/drbd0 First DRBD device
2283 1 = /dev/drbd1 Second DRBD device
2284 ...
2285
2286148 char Technology Concepts serial card
2287 0 = /dev/ttyT0 First TCL port
2288 1 = /dev/ttyT1 Second TCL port
2289 ...
2290
2291149 char Technology Concepts serial card - alternate devices
2292 0 = /dev/cut0 Callout device for ttyT0
2293 1 = /dev/cut0 Callout device for ttyT1
2294 ...
2295
2296150 char Real-Time Linux FIFOs
2297 0 = /dev/rtf0 First RTLinux FIFO
2298 1 = /dev/rtf1 Second RTLinux FIFO
2299 ...
2300
2301151 char DPT I2O SmartRaid V controller
2302 0 = /dev/dpti0 First DPT I2O adapter
2303 1 = /dev/dpti1 Second DPT I2O adapter
2304 ...
2305
2306152 char EtherDrive Control Device
2307 0 = /dev/etherd/ctl Connect/Disconnect an EtherDrive
2308 1 = /dev/etherd/err Monitor errors
2309 2 = /dev/etherd/raw Raw AoE packet monitor
2310
2311152 block EtherDrive Block Devices
2312 0 = /dev/etherd/0 EtherDrive 0
2313 ...
2314 255 = /dev/etherd/255 EtherDrive 255
2315
2316153 char SPI Bus Interface (sometimes referred to as MicroWire)
2317 0 = /dev/spi0 First SPI device on the bus
2318 1 = /dev/spi1 Second SPI device on the bus
2319 ...
2320 15 = /dev/spi15 Sixteenth SPI device on the bus
2321
2322153 block Enhanced Metadisk RAID (EMD) storage units
2323 0 = /dev/emd/0 First unit
2324 1 = /dev/emd/0p1 Partition 1 on First unit
2325 2 = /dev/emd/0p2 Partition 2 on First unit
2326 ...
2327 15 = /dev/emd/0p15 Partition 15 on First unit
2328
2329 16 = /dev/emd/1 Second unit
2330 32 = /dev/emd/2 Third unit
2331 ...
2332 240 = /dev/emd/15 Sixteenth unit
2333
2334 Partitions are handled in the same way as for IDE
2335 disks (see major number 3) except that the limit on
2336 partitions is 15.
2337
2338154 char Specialix RIO serial card
2339 0 = /dev/ttySR0 First RIO port
2340 ...
2341 255 = /dev/ttySR255 256th RIO port
2342
2343155 char Specialix RIO serial card - alternate devices
2344 0 = /dev/cusr0 Callout device for ttySR0
2345 ...
2346 255 = /dev/cusr255 Callout device for ttySR255
2347
2348156 char Specialix RIO serial card
2349 0 = /dev/ttySR256 257th RIO port
2350 ...
2351 255 = /dev/ttySR511 512th RIO port
2352
2353157 char Specialix RIO serial card - alternate devices
2354 0 = /dev/cusr256 Callout device for ttySR256
2355 ...
2356 255 = /dev/cusr511 Callout device for ttySR511
2357
2358158 char Dialogic GammaLink fax driver
2359 0 = /dev/gfax0 GammaLink channel 0
2360 1 = /dev/gfax1 GammaLink channel 1
2361 ...
2362
2363159 char RESERVED
30aaa5c6 2364
1da177e4
LT		 2365159 block RESERVED
2366
2367160 char General Purpose Instrument Bus (GPIB)
2368 0 = /dev/gpib0 First GPIB bus
2369 1 = /dev/gpib1 Second GPIB bus
2370 ...
2371
2372160 block Carmel 8-port SATA Disks on First Controller
2373 0 = /dev/carmel/0 SATA disk 0 whole disk
2374 1 = /dev/carmel/0p1 SATA disk 0 partition 1
2375 ...
2376 31 = /dev/carmel/0p31 SATA disk 0 partition 31
2377
2378 32 = /dev/carmel/1 SATA disk 1 whole disk
2379 64 = /dev/carmel/2 SATA disk 2 whole disk
2380 ...
2381 224 = /dev/carmel/7 SATA disk 7 whole disk
2382
2383 Partitions are handled in the same way as for IDE
2384 disks (see major number 3) except that the limit on
2385 partitions is 31.
2386
2387161 char IrCOMM devices (IrDA serial/parallel emulation)
2388 0 = /dev/ircomm0 First IrCOMM device
2389 1 = /dev/ircomm1 Second IrCOMM device
2390 ...
2391 16 = /dev/irlpt0 First IrLPT device
2392 17 = /dev/irlpt1 Second IrLPT device
2393 ...
2394
2395161 block Carmel 8-port SATA Disks on Second Controller
2396 0 = /dev/carmel/8 SATA disk 8 whole disk
2397 1 = /dev/carmel/8p1 SATA disk 8 partition 1
2398 ...
2399 31 = /dev/carmel/8p31 SATA disk 8 partition 31
2400
2401 32 = /dev/carmel/9 SATA disk 9 whole disk
2402 64 = /dev/carmel/10 SATA disk 10 whole disk
2403 ...
2404 224 = /dev/carmel/15 SATA disk 15 whole disk
2405
2406 Partitions are handled in the same way as for IDE
2407 disks (see major number 3) except that the limit on
30aaa5c6 2408 partitions is 31.
1da177e4
LT		 2409
2410162 char Raw block device interface
2411 0 = /dev/rawctl Raw I/O control device
2412 1 = /dev/raw/raw1 First raw I/O device
2413 2 = /dev/raw/raw2 Second raw I/O device
2414 ...
d2582a7a
KM		 2415 max minor number of raw device is set by kernel config
2416 MAX_RAW_DEVS or raw module parameter 'max_raw_devs'
1da177e4 2417
04c860c1 2418163 char
1da177e4
LT		 2419
2420164 char Chase Research AT/PCI-Fast serial card
2421 0 = /dev/ttyCH0 AT/PCI-Fast board 0, port 0
2422 ...
2423 15 = /dev/ttyCH15 AT/PCI-Fast board 0, port 15
2424 16 = /dev/ttyCH16 AT/PCI-Fast board 1, port 0
2425 ...
2426 31 = /dev/ttyCH31 AT/PCI-Fast board 1, port 15
2427 32 = /dev/ttyCH32 AT/PCI-Fast board 2, port 0
2428 ...
2429 47 = /dev/ttyCH47 AT/PCI-Fast board 2, port 15
2430 48 = /dev/ttyCH48 AT/PCI-Fast board 3, port 0
2431 ...
2432 63 = /dev/ttyCH63 AT/PCI-Fast board 3, port 15
2433
2434165 char Chase Research AT/PCI-Fast serial card - alternate devices
2435 0 = /dev/cuch0 Callout device for ttyCH0
2436 ...
2437 63 = /dev/cuch63 Callout device for ttyCH63
2438
2439166 char ACM USB modems
2440 0 = /dev/ttyACM0 First ACM modem
2441 1 = /dev/ttyACM1 Second ACM modem
2442 ...
2443
2444167 char ACM USB modems - alternate devices
2445 0 = /dev/cuacm0 Callout device for ttyACM0
2446 1 = /dev/cuacm1 Callout device for ttyACM1
2447 ...
2448
2449168 char Eracom CSA7000 PCI encryption adaptor
2450 0 = /dev/ecsa0 First CSA7000
2451 1 = /dev/ecsa1 Second CSA7000
2452 ...
2453
2454169 char Eracom CSA8000 PCI encryption adaptor
2455 0 = /dev/ecsa8-0 First CSA8000
2456 1 = /dev/ecsa8-1 Second CSA8000
2457 ...
2458
2459170 char AMI MegaRAC remote access controller
2460 0 = /dev/megarac0 First MegaRAC card
2461 1 = /dev/megarac1 Second MegaRAC card
2462 ...
2463
2464171 char Reserved for IEEE 1394 (Firewire)
2465
1da177e4
LT		 2466172 char Moxa Intellio serial card
2467 0 = /dev/ttyMX0 First Moxa port
2468 1 = /dev/ttyMX1 Second Moxa port
2469 ...
2470 127 = /dev/ttyMX127 128th Moxa port
2471 128 = /dev/moxactl Moxa control port
2472
2473173 char Moxa Intellio serial card - alternate devices
2474 0 = /dev/cumx0 Callout device for ttyMX0
2475 1 = /dev/cumx1 Callout device for ttyMX1
2476 ...
2477 127 = /dev/cumx127 Callout device for ttyMX127
2478
2479174 char SmartIO serial card
2480 0 = /dev/ttySI0 First SmartIO port
2481 1 = /dev/ttySI1 Second SmartIO port
2482 ...
2483
2484175 char SmartIO serial card - alternate devices
2485 0 = /dev/cusi0 Callout device for ttySI0
2486 1 = /dev/cusi1 Callout device for ttySI1
2487 ...
2488
2489176 char nCipher nFast PCI crypto accelerator
2490 0 = /dev/nfastpci0 First nFast PCI device
2491 1 = /dev/nfastpci1 First nFast PCI device
2492 ...
2493
2494177 char TI PCILynx memory spaces
2495 0 = /dev/pcilynx/aux0 AUX space of first PCILynx card
2496 ...
2497 15 = /dev/pcilynx/aux15 AUX space of 16th PCILynx card
2498 16 = /dev/pcilynx/rom0 ROM space of first PCILynx card
2499 ...
2500 31 = /dev/pcilynx/rom15 ROM space of 16th PCILynx card
2501 32 = /dev/pcilynx/ram0 RAM space of first PCILynx card
2502 ...
2503 47 = /dev/pcilynx/ram15 RAM space of 16th PCILynx card
2504
2505178 char Giganet cLAN1xxx virtual interface adapter
2506 0 = /dev/clanvi0 First cLAN adapter
2507 1 = /dev/clanvi1 Second cLAN adapter
2508 ...
2509
04c860c1
AC		 2510179 block MMC block devices
2511 0 = /dev/mmcblk0 First SD/MMC card
2512 1 = /dev/mmcblk0p1 First partition on first MMC card
2513 8 = /dev/mmcblk1 Second SD/MMC card
2514 ...
2515
5e71b7a6
OJ		 2516 The start of next SD/MMC card can be configured with
2517 CONFIG_MMC_BLOCK_MINORS, or overridden at boot/modprobe
2518 time using the mmcblk.perdev_minors option. That would
2519 bump the offset between each card to be the configured
2520 value instead of the default 8.
2521
1da177e4
LT		 2522179 char CCube DVXChip-based PCI products
2523 0 = /dev/dvxirq0 First DVX device
2524 1 = /dev/dvxirq1 Second DVX device
2525 ...
2526
2527180 char USB devices
2528 0 = /dev/usb/lp0 First USB printer
2529 ...
2530 15 = /dev/usb/lp15 16th USB printer
1da177e4
LT		 2531 48 = /dev/usb/scanner0 First USB scanner
2532 ...
2533 63 = /dev/usb/scanner15 16th USB scanner
2534 64 = /dev/usb/rio500 Diamond Rio 500
2535 65 = /dev/usb/usblcd USBLCD Interface (info@usblcd.de)
2536 66 = /dev/usb/cpad0 Synaptics cPad (mouse/LCD)
11420211
JE		 2537 96 = /dev/usb/hiddev0 1st USB HID device
2538 ...
2539 111 = /dev/usb/hiddev15 16th USB HID device
04c860c1
AC		 2540 112 = /dev/usb/auer0 1st auerswald ISDN device
2541 ...
2542 127 = /dev/usb/auer15 16th auerswald ISDN device
11420211
JE		 2543 128 = /dev/usb/brlvgr0 First Braille Voyager device
2544 ...
2545 131 = /dev/usb/brlvgr3 Fourth Braille Voyager device
2546 132 = /dev/usb/idmouse ID Mouse (fingerprint scanner) device
2547 133 = /dev/usb/sisusbvga1 First SiSUSB VGA device
2548 ...
30aaa5c6 2549 140 = /dev/usb/sisusbvga8 Eighth SISUSB VGA device
11420211
JE		 2550 144 = /dev/usb/lcd USB LCD device
2551 160 = /dev/usb/legousbtower0 1st USB Legotower device
2552 ...
2553 175 = /dev/usb/legousbtower15 16th USB Legotower device
5b775f67
GKH		 2554 176 = /dev/usb/usbtmc1 First USB TMC device
2555 ...
1b62d258
GKH		 2556 191 = /dev/usb/usbtmc16 16th USB TMC device
2557 192 = /dev/usb/yurex1 First USB Yurex device
2558 ...
2559 209 = /dev/usb/yurex16 16th USB Yurex device
1da177e4
LT		 2560
2561180 block USB block devices
953a7f20
PZ		 2562 0 = /dev/uba First USB block device
2563 8 = /dev/ubb Second USB block device
2564 16 = /dev/ubc Third USB block device
30aaa5c6 2565 ...
1da177e4
LT		 2566
2567181 char Conrad Electronic parallel port radio clocks
2568 0 = /dev/pcfclock0 First Conrad radio clock
2569 1 = /dev/pcfclock1 Second Conrad radio clock
2570 ...
2571
2572182 char Picture Elements THR2 binarizer
2573 0 = /dev/pethr0 First THR2 board
2574 1 = /dev/pethr1 Second THR2 board
2575 ...
2576
2577183 char SST 5136-DN DeviceNet interface
2578 0 = /dev/ss5136dn0 First DeviceNet interface
2579 1 = /dev/ss5136dn1 Second DeviceNet interface
2580 ...
2581
2582 This device used to be assigned to major number 144.
2583 It had to be moved due to an unfortunate conflict.
2584
2585184 char Picture Elements' video simulator/sender
2586 0 = /dev/pevss0 First sender board
2587 1 = /dev/pevss1 Second sender board
2588 ...
2589
2590185 char InterMezzo high availability file system
2591 0 = /dev/intermezzo0 First cache manager
2592 1 = /dev/intermezzo1 Second cache manager
2593 ...
2594
0ea6e611
JM		 2595 See http://web.archive.org/web/20080115195241/
2596 http://inter-mezzo.org/index.html
1da177e4
LT		 2597
2598186 char Object-based storage control device
2599 0 = /dev/obd0 First obd control device
2600 1 = /dev/obd1 Second obd control device
2601 ...
2602
2603 See ftp://ftp.lustre.org/pub/obd for code and information.
2604
2605187 char DESkey hardware encryption device
2606 0 = /dev/deskey0 First DES key
2607 1 = /dev/deskey1 Second DES key
2608 ...
2609
2610188 char USB serial converters
2611 0 = /dev/ttyUSB0 First USB serial converter
2612 1 = /dev/ttyUSB1 Second USB serial converter
2613 ...
2614
2615189 char USB serial converters - alternate devices
2616 0 = /dev/cuusb0 Callout device for ttyUSB0
2617 1 = /dev/cuusb1 Callout device for ttyUSB1
2618 ...
2619
2620190 char Kansas City tracker/tuner card
2621 0 = /dev/kctt0 First KCT/T card
2622 1 = /dev/kctt1 Second KCT/T card
2623 ...
2624
2625191 char Reserved for PCMCIA
2626
2627192 char Kernel profiling interface
2628 0 = /dev/profile Profiling control device
2629 1 = /dev/profile0 Profiling device for CPU 0
2630 2 = /dev/profile1 Profiling device for CPU 1
2631 ...
2632
2633193 char Kernel event-tracing interface
2634 0 = /dev/trace Tracing control device
2635 1 = /dev/trace0 Tracing device for CPU 0
2636 2 = /dev/trace1 Tracing device for CPU 1
2637 ...
2638
2639194 char linVideoStreams (LINVS)
2640 0 = /dev/mvideo/status0 Video compression status
2641 1 = /dev/mvideo/stream0 Video stream
2642 2 = /dev/mvideo/frame0 Single compressed frame
2643 3 = /dev/mvideo/rawframe0 Raw uncompressed frame
2644 4 = /dev/mvideo/codec0 Direct codec access
2645 5 = /dev/mvideo/video4linux0 Video4Linux compatibility
2646
2647 16 = /dev/mvideo/status1 Second device
2648 ...
2649 32 = /dev/mvideo/status2 Third device
2650 ...
2651 ...
30aaa5c6 2652 240 = /dev/mvideo/status15 16th device
1da177e4
LT		 2653 ...
2654
2655195 char Nvidia graphics devices
2656 0 = /dev/nvidia0 First Nvidia card
2657 1 = /dev/nvidia1 Second Nvidia card
2658 ...
2659 255 = /dev/nvidiactl Nvidia card control device
2660
2661196 char Tormenta T1 card
2662 0 = /dev/tor/0 Master control channel for all cards
2663 1 = /dev/tor/1 First DS0
2664 2 = /dev/tor/2 Second DS0
2665 ...
2666 48 = /dev/tor/48 48th DS0
2667 49 = /dev/tor/49 First pseudo-channel
2668 50 = /dev/tor/50 Second pseudo-channel
2669 ...
2670
2671197 char OpenTNF tracing facility
2672 0 = /dev/tnf/t0 Trace 0 data extraction
2673 1 = /dev/tnf/t1 Trace 1 data extraction
2674 ...
2675 128 = /dev/tnf/status Tracing facility status
2676 130 = /dev/tnf/trace Tracing device
2677
2678198 char Total Impact TPMP2 quad coprocessor PCI card
2679 0 = /dev/tpmp2/0 First card
2680 1 = /dev/tpmp2/1 Second card
2681 ...
2682
2683199 char Veritas volume manager (VxVM) volumes
2684 0 = /dev/vx/rdsk/*/* First volume
2685 1 = /dev/vx/rdsk/*/* Second volume
2686 ...
2687
2688199 block Veritas volume manager (VxVM) volumes
2689 0 = /dev/vx/dsk/*/* First volume
2690 1 = /dev/vx/dsk/*/* Second volume
2691 ...
2692
2693 The namespace in these directories is maintained by
2694 the user space VxVM software.
2695
2696200 char Veritas VxVM configuration interface
2697 0 = /dev/vx/config Configuration access node
2698 1 = /dev/vx/trace Volume i/o trace access node
2699 2 = /dev/vx/iod Volume i/o daemon access node
2700 3 = /dev/vx/info Volume information access node
2701 4 = /dev/vx/task Volume tasks access node
2702 5 = /dev/vx/taskmon Volume tasks monitor daemon
2703
2704201 char Veritas VxVM dynamic multipathing driver
2705 0 = /dev/vx/rdmp/* First multipath device
2706 1 = /dev/vx/rdmp/* Second multipath device
2707 ...
2708201 block Veritas VxVM dynamic multipathing driver
2709 0 = /dev/vx/dmp/* First multipath device
2710 1 = /dev/vx/dmp/* Second multipath device
2711 ...
2712
2713 The namespace in these directories is maintained by
2714 the user space VxVM software.
2715
2716202 char CPU model-specific registers
2717 0 = /dev/cpu/0/msr MSRs on CPU 0
2718 1 = /dev/cpu/1/msr MSRs on CPU 1
2719 ...
2720
11420211
JE		 2721202 block Xen Virtual Block Device
2722 0 = /dev/xvda First Xen VBD whole disk
2723 16 = /dev/xvdb Second Xen VBD whole disk
2724 32 = /dev/xvdc Third Xen VBD whole disk
2725 ...
2726 240 = /dev/xvdp Sixteenth Xen VBD whole disk
2727
2728 Partitions are handled in the same way as for IDE
2729 disks (see major number 3) except that the limit on
2730 partitions is 15.
2731
1da177e4
LT		 2732203 char CPU CPUID information
2733 0 = /dev/cpu/0/cpuid CPUID on CPU 0
2734 1 = /dev/cpu/1/cpuid CPUID on CPU 1
2735 ...
2736
2737204 char Low-density serial ports
2738 0 = /dev/ttyLU0 LinkUp Systems L72xx UART - port 0
2739 1 = /dev/ttyLU1 LinkUp Systems L72xx UART - port 1
2740 2 = /dev/ttyLU2 LinkUp Systems L72xx UART - port 2
2741 3 = /dev/ttyLU3 LinkUp Systems L72xx UART - port 3
2742 4 = /dev/ttyFB0 Intel Footbridge (ARM)
2743 5 = /dev/ttySA0 StrongARM builtin serial port 0
2744 6 = /dev/ttySA1 StrongARM builtin serial port 1
2745 7 = /dev/ttySA2 StrongARM builtin serial port 2
2746 8 = /dev/ttySC0 SCI serial port (SuperH) - port 0
2747 9 = /dev/ttySC1 SCI serial port (SuperH) - port 1
2748 10 = /dev/ttySC2 SCI serial port (SuperH) - port 2
2749 11 = /dev/ttySC3 SCI serial port (SuperH) - port 3
2750 12 = /dev/ttyFW0 Firmware console - port 0
2751 13 = /dev/ttyFW1 Firmware console - port 1
2752 14 = /dev/ttyFW2 Firmware console - port 2
2753 15 = /dev/ttyFW3 Firmware console - port 3
2754 16 = /dev/ttyAM0 ARM "AMBA" serial port 0
2755 ...
2756 31 = /dev/ttyAM15 ARM "AMBA" serial port 15
2757 32 = /dev/ttyDB0 DataBooster serial port 0
2758 ...
2759 39 = /dev/ttyDB7 DataBooster serial port 7
2760 40 = /dev/ttySG0 SGI Altix console port
2761 41 = /dev/ttySMX0 Motorola i.MX - port 0
2762 42 = /dev/ttySMX1 Motorola i.MX - port 1
2763 43 = /dev/ttySMX2 Motorola i.MX - port 2
2764 44 = /dev/ttyMM0 Marvell MPSC - port 0
2765 45 = /dev/ttyMM1 Marvell MPSC - port 1
2766 46 = /dev/ttyCPM0 PPC CPM (SCC or SMC) - port 0
2767 ...
2768 47 = /dev/ttyCPM5 PPC CPM (SCC or SMC) - port 5
11420211
JE		 2769 50 = /dev/ttyIOC0 Altix serial card
2770 ...
2771 81 = /dev/ttyIOC31 Altix serial card
2772 82 = /dev/ttyVR0 NEC VR4100 series SIU
2773 83 = /dev/ttyVR1 NEC VR4100 series DSIU
2774 84 = /dev/ttyIOC84 Altix ioc4 serial card
2775 ...
2776 115 = /dev/ttyIOC115 Altix ioc4 serial card
2777 116 = /dev/ttySIOC0 Altix ioc3 serial card
2778 ...
2779 147 = /dev/ttySIOC31 Altix ioc3 serial card
2780 148 = /dev/ttyPSC0 PPC PSC - port 0
2781 ...
2782 153 = /dev/ttyPSC5 PPC PSC - port 5
2783 154 = /dev/ttyAT0 ATMEL serial port 0
1da177e4 2784 ...
11420211
JE		 2785 169 = /dev/ttyAT15 ATMEL serial port 15
2786 170 = /dev/ttyNX0 Hilscher netX serial port 0
2787 ...
2788 185 = /dev/ttyNX15 Hilscher netX serial port 15
a4521948 2789 186 = /dev/ttyJ0 JTAG1 DCC protocol based serial port emulation
30aaa5c6
TM		 2790 187 = /dev/ttyUL0 Xilinx uartlite - port 0
2791 ...
2792 190 = /dev/ttyUL3 Xilinx uartlite - port 3
2793 191 = /dev/xvc0 Xen virtual console - port 0
04c860c1
AC		 2794 192 = /dev/ttyPZ0 pmac_zilog - port 0
2795 ...
2796 195 = /dev/ttyPZ3 pmac_zilog - port 3
2797 196 = /dev/ttyTX0 TX39/49 serial port 0
2798 ...
2799 204 = /dev/ttyTX7 TX39/49 serial port 7
2800 205 = /dev/ttySC0 SC26xx serial port 0
2801 206 = /dev/ttySC1 SC26xx serial port 1
2802 207 = /dev/ttySC2 SC26xx serial port 2
2803 208 = /dev/ttySC3 SC26xx serial port 3
05b36302
AC		 2804 209 = /dev/ttyMAX0 MAX3100 serial port 0
2805 210 = /dev/ttyMAX1 MAX3100 serial port 1
2806 211 = /dev/ttyMAX2 MAX3100 serial port 2
2807 212 = /dev/ttyMAX3 MAX3100 serial port 3
1da177e4
LT		 2808
2809205 char Low-density serial ports (alternate device)
2810 0 = /dev/culu0 Callout device for ttyLU0
2811 1 = /dev/culu1 Callout device for ttyLU1
2812 2 = /dev/culu2 Callout device for ttyLU2
2813 3 = /dev/culu3 Callout device for ttyLU3
2814 4 = /dev/cufb0 Callout device for ttyFB0
2815 5 = /dev/cusa0 Callout device for ttySA0
2816 6 = /dev/cusa1 Callout device for ttySA1
2817 7 = /dev/cusa2 Callout device for ttySA2
2818 8 = /dev/cusc0 Callout device for ttySC0
2819 9 = /dev/cusc1 Callout device for ttySC1
2820 10 = /dev/cusc2 Callout device for ttySC2
2821 11 = /dev/cusc3 Callout device for ttySC3
2822 12 = /dev/cufw0 Callout device for ttyFW0
2823 13 = /dev/cufw1 Callout device for ttyFW1
2824 14 = /dev/cufw2 Callout device for ttyFW2
2825 15 = /dev/cufw3 Callout device for ttyFW3
2826 16 = /dev/cuam0 Callout device for ttyAM0
2827 ...
2828 31 = /dev/cuam15 Callout device for ttyAM15
2829 32 = /dev/cudb0 Callout device for ttyDB0
2830 ...
2831 39 = /dev/cudb7 Callout device for ttyDB7
2832 40 = /dev/cusg0 Callout device for ttySG0
2833 41 = /dev/ttycusmx0 Callout device for ttySMX0
2834 42 = /dev/ttycusmx1 Callout device for ttySMX1
2835 43 = /dev/ttycusmx2 Callout device for ttySMX2
2836 46 = /dev/cucpm0 Callout device for ttyCPM0
2837 ...
2838 49 = /dev/cucpm5 Callout device for ttyCPM5
2839 50 = /dev/cuioc40 Callout device for ttyIOC40
2840 ...
2841 81 = /dev/cuioc431 Callout device for ttyIOC431
11420211
JE		 2842 82 = /dev/cuvr0 Callout device for ttyVR0
2843 83 = /dev/cuvr1 Callout device for ttyVR1
1da177e4 2844
1da177e4
LT		 2845206 char OnStream SC-x0 tape devices
2846 0 = /dev/osst0 First OnStream SCSI tape, mode 0
2847 1 = /dev/osst1 Second OnStream SCSI tape, mode 0
2848 ...
2849 32 = /dev/osst0l First OnStream SCSI tape, mode 1
2850 33 = /dev/osst1l Second OnStream SCSI tape, mode 1
2851 ...
2852 64 = /dev/osst0m First OnStream SCSI tape, mode 2
2853 65 = /dev/osst1m Second OnStream SCSI tape, mode 2
2854 ...
2855 96 = /dev/osst0a First OnStream SCSI tape, mode 3
2856 97 = /dev/osst1a Second OnStream SCSI tape, mode 3
2857 ...
2858 128 = /dev/nosst0 No rewind version of /dev/osst0
2859 129 = /dev/nosst1 No rewind version of /dev/osst1
2860 ...
2861 160 = /dev/nosst0l No rewind version of /dev/osst0l
2862 161 = /dev/nosst1l No rewind version of /dev/osst1l
2863 ...
2864 192 = /dev/nosst0m No rewind version of /dev/osst0m
2865 193 = /dev/nosst1m No rewind version of /dev/osst1m
2866 ...
2867 224 = /dev/nosst0a No rewind version of /dev/osst0a
2868 225 = /dev/nosst1a No rewind version of /dev/osst1a
2869 ...
2870
2871 The OnStream SC-x0 SCSI tapes do not support the
2872 standard SCSI SASD command set and therefore need
2873 their own driver "osst". Note that the IDE, USB (and
2874 maybe ParPort) versions may be driven via ide-scsi or
2875 usb-storage SCSI emulation and this osst device and
2876 driver as well. The ADR-x0 drives are QIC-157
2877 compliant and don't need osst.
2878
2879207 char Compaq ProLiant health feature indicate
2880 0 = /dev/cpqhealth/cpqw Redirector interface
2881 1 = /dev/cpqhealth/crom EISA CROM
2882 2 = /dev/cpqhealth/cdt Data Table
2883 3 = /dev/cpqhealth/cevt Event Log
2884 4 = /dev/cpqhealth/casr Automatic Server Recovery
2885 5 = /dev/cpqhealth/cecc ECC Memory
2886 6 = /dev/cpqhealth/cmca Machine Check Architecture
2887 7 = /dev/cpqhealth/ccsm Deprecated CDT
2888 8 = /dev/cpqhealth/cnmi NMI Handling
2889 9 = /dev/cpqhealth/css Sideshow Management
2890 10 = /dev/cpqhealth/cram CMOS interface
2891 11 = /dev/cpqhealth/cpci PCI IRQ interface
2892
2893208 char User space serial ports
2894 0 = /dev/ttyU0 First user space serial port
2895 1 = /dev/ttyU1 Second user space serial port
2896 ...
2897
2898209 char User space serial ports (alternate devices)
2899 0 = /dev/cuu0 Callout device for ttyU0
2900 1 = /dev/cuu1 Callout device for ttyU1
2901 ...
2902
2903210 char SBE, Inc. sync/async serial card
2904 0 = /dev/sbei/wxcfg0 Configuration device for board 0
2905 1 = /dev/sbei/dld0 Download device for board 0
2906 2 = /dev/sbei/wan00 WAN device, port 0, board 0
2907 3 = /dev/sbei/wan01 WAN device, port 1, board 0
2908 4 = /dev/sbei/wan02 WAN device, port 2, board 0
2909 5 = /dev/sbei/wan03 WAN device, port 3, board 0
2910 6 = /dev/sbei/wanc00 WAN clone device, port 0, board 0
2911 7 = /dev/sbei/wanc01 WAN clone device, port 1, board 0
2912 8 = /dev/sbei/wanc02 WAN clone device, port 2, board 0
2913 9 = /dev/sbei/wanc03 WAN clone device, port 3, board 0
2914 10 = /dev/sbei/wxcfg1 Configuration device for board 1
2915 11 = /dev/sbei/dld1 Download device for board 1
2916 12 = /dev/sbei/wan10 WAN device, port 0, board 1
2917 13 = /dev/sbei/wan11 WAN device, port 1, board 1
2918 14 = /dev/sbei/wan12 WAN device, port 2, board 1
2919 15 = /dev/sbei/wan13 WAN device, port 3, board 1
2920 16 = /dev/sbei/wanc10 WAN clone device, port 0, board 1
2921 17 = /dev/sbei/wanc11 WAN clone device, port 1, board 1
2922 18 = /dev/sbei/wanc12 WAN clone device, port 2, board 1
2923 19 = /dev/sbei/wanc13 WAN clone device, port 3, board 1
2924 ...
2925
2926 Yes, each board is really spaced 10 (decimal) apart.
2927
2928211 char Addinum CPCI1500 digital I/O card
2929 0 = /dev/addinum/cpci1500/0 First CPCI1500 card
2930 1 = /dev/addinum/cpci1500/1 Second CPCI1500 card
2931 ...
2932
2933212 char LinuxTV.org DVB driver subsystem
1da177e4
LT		 2934 0 = /dev/dvb/adapter0/video0 first video decoder of first card
2935 1 = /dev/dvb/adapter0/audio0 first audio decoder of first card
2936 2 = /dev/dvb/adapter0/sec0 (obsolete/unused)
2937 3 = /dev/dvb/adapter0/frontend0 first frontend device of first card
2938 4 = /dev/dvb/adapter0/demux0 first demux device of first card
2939 5 = /dev/dvb/adapter0/dvr0 first digital video recoder device of first card
2940 6 = /dev/dvb/adapter0/ca0 first common access port of first card
2941 7 = /dev/dvb/adapter0/net0 first network device of first card
2942 8 = /dev/dvb/adapter0/osd0 first on-screen-display device of first card
2943 9 = /dev/dvb/adapter0/video1 second video decoder of first card
2944 ...
2945 64 = /dev/dvb/adapter1/video0 first video decoder of second card
2946 ...
2947 128 = /dev/dvb/adapter2/video0 first video decoder of third card
2948 ...
2949 196 = /dev/dvb/adapter3/video0 first video decoder of fourth card
2950
c611d2cd
MH		 2951216 char Bluetooth RFCOMM TTY devices
2952 0 = /dev/rfcomm0 First Bluetooth RFCOMM TTY device
2953 1 = /dev/rfcomm1 Second Bluetooth RFCOMM TTY device
1da177e4
LT		 2954 ...
2955
c611d2cd
MH		 2956217 char Bluetooth RFCOMM TTY devices (alternate devices)
2957 0 = /dev/curf0 Callout device for rfcomm0
2958 1 = /dev/curf1 Callout device for rfcomm1
1da177e4
LT		 2959 ...
2960
2961218 char The Logical Company bus Unibus/Qbus adapters
2962 0 = /dev/logicalco/bci/0 First bus adapter
2963 1 = /dev/logicalco/bci/1 First bus adapter
2964 ...
2965
2966219 char The Logical Company DCI-1300 digital I/O card
2967 0 = /dev/logicalco/dci1300/0 First DCI-1300 card
2968 1 = /dev/logicalco/dci1300/1 Second DCI-1300 card
2969 ...
2970
2971220 char Myricom Myrinet "GM" board
2972 0 = /dev/myricom/gm0 First Myrinet GM board
2973 1 = /dev/myricom/gmp0 First board "root access"
2974 2 = /dev/myricom/gm1 Second Myrinet GM board
2975 3 = /dev/myricom/gmp1 Second board "root access"
2976 ...
2977
2978221 char VME bus
2979 0 = /dev/bus/vme/m0 First master image
2980 1 = /dev/bus/vme/m1 Second master image
2981 2 = /dev/bus/vme/m2 Third master image
2982 3 = /dev/bus/vme/m3 Fourth master image
2983 4 = /dev/bus/vme/s0 First slave image
2984 5 = /dev/bus/vme/s1 Second slave image
2985 6 = /dev/bus/vme/s2 Third slave image
2986 7 = /dev/bus/vme/s3 Fourth slave image
2987 8 = /dev/bus/vme/ctl Control
2988
2989 It is expected that all VME bus drivers will use the
2990 same interface. For interface documentation see
2991 http://www.vmelinux.org/.
2992
2993224 char A2232 serial card
2994 0 = /dev/ttyY0 First A2232 port
2995 1 = /dev/ttyY1 Second A2232 port
2996 ...
2997
2998225 char A2232 serial card (alternate devices)
2999 0 = /dev/cuy0 Callout device for ttyY0
3000 1 = /dev/cuy1 Callout device for ttyY1
3001 ...
3002
3003226 char Direct Rendering Infrastructure (DRI)
3004 0 = /dev/dri/card0 First graphics card
3005 1 = /dev/dri/card1 Second graphics card
3006 ...
3007
3008227 char IBM 3270 terminal Unix tty access
3009 1 = /dev/3270/tty1 First 3270 terminal
3010 2 = /dev/3270/tty2 Seconds 3270 terminal
3011 ...
3012
3013228 char IBM 3270 terminal block-mode access
3014 0 = /dev/3270/tub Controlling interface
3015 1 = /dev/3270/tub1 First 3270 terminal
3016 2 = /dev/3270/tub2 Second 3270 terminal
3017 ...
3018
30aaa5c6
TM		 3019229 char IBM iSeries/pSeries virtual console
3020 0 = /dev/hvc0 First console port
3021 1 = /dev/hvc1 Second console port
1da177e4
LT		 3022 ...
3023
3024230 char IBM iSeries virtual tape
3025 0 = /dev/iseries/vt0 First virtual tape, mode 0
3026 1 = /dev/iseries/vt1 Second virtual tape, mode 0
3027 ...
3028 32 = /dev/iseries/vt0l First virtual tape, mode 1
3029 33 = /dev/iseries/vt1l Second virtual tape, mode 1
3030 ...
3031 64 = /dev/iseries/vt0m First virtual tape, mode 2
3032 65 = /dev/iseries/vt1m Second virtual tape, mode 2
3033 ...
3034 96 = /dev/iseries/vt0a First virtual tape, mode 3
3035 97 = /dev/iseries/vt1a Second virtual tape, mode 3
3036 ...
3037 128 = /dev/iseries/nvt0 First virtual tape, mode 0, no rewind
3038 129 = /dev/iseries/nvt1 Second virtual tape, mode 0, no rewind
3039 ...
3040 160 = /dev/iseries/nvt0l First virtual tape, mode 1, no rewind
3041 161 = /dev/iseries/nvt1l Second virtual tape, mode 1, no rewind
3042 ...
3043 192 = /dev/iseries/nvt0m First virtual tape, mode 2, no rewind
3044 193 = /dev/iseries/nvt1m Second virtual tape, mode 2, no rewind
3045 ...
3046 224 = /dev/iseries/nvt0a First virtual tape, mode 3, no rewind
3047 225 = /dev/iseries/nvt1a Second virtual tape, mode 3, no rewind
3048 ...
3049
3050 "No rewind" refers to the omission of the default
3051 automatic rewind on device close. The MTREW or MTOFFL
3052 ioctl()'s can be used to rewind the tape regardless of
3053 the device used to access it.
3054
11420211 3055231 char InfiniBand
1da177e4
LT		 3056 0 = /dev/infiniband/umad0
3057 1 = /dev/infiniband/umad1
11420211
JE		 3058 ...
3059 63 = /dev/infiniband/umad63 63rd InfiniBandMad device
3060 64 = /dev/infiniband/issm0 First InfiniBand IsSM device
3061 65 = /dev/infiniband/issm1 Second InfiniBand IsSM device
3062 ...
3063 127 = /dev/infiniband/issm63 63rd InfiniBand IsSM device
3064 128 = /dev/infiniband/uverbs0 First InfiniBand verbs device
3065 129 = /dev/infiniband/uverbs1 Second InfiniBand verbs device
3066 ...
3067 159 = /dev/infiniband/uverbs31 31st InfiniBand verbs device
3068
3069232 char Biometric Devices
3070 0 = /dev/biometric/sensor0/fingerprint first fingerprint sensor on first device
3071 1 = /dev/biometric/sensor0/iris first iris sensor on first device
3072 2 = /dev/biometric/sensor0/retina first retina sensor on first device
3073 3 = /dev/biometric/sensor0/voiceprint first voiceprint sensor on first device
3074 4 = /dev/biometric/sensor0/facial first facial sensor on first device
3075 5 = /dev/biometric/sensor0/hand first hand sensor on first device
3076 ...
3077 10 = /dev/biometric/sensor1/fingerprint first fingerprint sensor on second device
3078 ...
3079 20 = /dev/biometric/sensor2/fingerprint first fingerprint sensor on third device
3080 ...
1da177e4 3081
11420211
JE		 3082233 char PathScale InfiniPath interconnect
3083 0 = /dev/ipath Primary device for programs (any unit)
3084 1 = /dev/ipath0 Access specifically to unit 0
3085 2 = /dev/ipath1 Access specifically to unit 1
3086 ...
3087 4 = /dev/ipath3 Access specifically to unit 3
3088 129 = /dev/ipath_sma Device used by Subnet Management Agent
3089 130 = /dev/ipath_diag Device used by diagnostics programs
3090
3091234-239 UNASSIGNED
1da177e4
LT		 3092
3093240-254 char LOCAL/EXPERIMENTAL USE
30aaa5c6 3094
1da177e4
LT		 3095240-254 block LOCAL/EXPERIMENTAL USE
3096 Allocated for local/experimental use. For devices not
3097 assigned official numbers, these ranges should be
3098 used in order to avoid conflicting with future assignments.
3099
3100255 char RESERVED
30aaa5c6 3101
1da177e4
LT		 3102255 block RESERVED
3103
3104 This major is reserved to assist the expansion to a
3105 larger number space. No device nodes with this major
3106 should ever be created on the filesystem.
992caacf 3107 (This is probably not true anymore, but I'll leave it
11420211
JE		 3108 for now /Torben)
3109
3110---LARGE MAJORS!!!!!---
3111
3112256 char Equinox SST multi-port serial boards
3113 0 = /dev/ttyEQ0 First serial port on first Equinox SST board
3114 127 = /dev/ttyEQ127 Last serial port on first Equinox SST board
3115 128 = /dev/ttyEQ128 First serial port on second Equinox SST board
3116 ...
3117 1027 = /dev/ttyEQ1027 Last serial port on eighth Equinox SST board
3118
3119256 block Resident Flash Disk Flash Translation Layer
3120 0 = /dev/rfda First RFD FTL layer
3121 16 = /dev/rfdb Second RFD FTL layer
3122 ...
3123 240 = /dev/rfdp 16th RFD FTL layer
3124
a4521948
JE		 3125257 char Phoenix Technologies Cryptographic Services Driver
3126 0 = /dev/ptlsec Crypto Services Driver
3127
30aaa5c6
TM		 3128257 block SSFDC Flash Translation Layer filesystem
3129 0 = /dev/ssfdca First SSFDC layer
3130 8 = /dev/ssfdcb Second SSFDC layer
3131 16 = /dev/ssfdcc Third SSFDC layer
3132 24 = /dev/ssfdcd 4th SSFDC layer
3133 32 = /dev/ssfdce 5th SSFDC layer
3134 40 = /dev/ssfdcf 6th SSFDC layer
3135 48 = /dev/ssfdcg 7th SSFDC layer
3136 56 = /dev/ssfdch 8th SSFDC layer
3137
3138258 block ROM/Flash read-only translation layer
3139 0 = /dev/blockrom0 First ROM card's translation layer interface
3140 1 = /dev/blockrom1 Second ROM card's translation layer interface
3141 ...
1da177e4 3142
04c860c1
AC		 3143259 block Block Extended Major
3144 Used dynamically to hold additional partition minor
3145 numbers and allow large numbers of partitions per device
3146
3147259 char FPGA configuration interfaces
3148 0 = /dev/icap0 First Xilinx internal configuration
3149 1 = /dev/icap1 Second Xilinx internal configuration
3150
71969fd9
BH		 3151260 char OSD (Object-based-device) SCSI Device
3152 0 = /dev/osd0 First OSD Device
3153 1 = /dev/osd1 Second OSD Device
3154 ...
3155 255 = /dev/osd255 256th OSD Device
3156
1da177e4
LT		 3157 **** ADDITIONAL /dev DIRECTORY ENTRIES
3158
3159This section details additional entries that should or may exist in
3160the /dev directory. It is preferred that symbolic links use the same
3161form (absolute or relative) as is indicated here. Links are
3162classified as "hard" or "symbolic" depending on the preferred type of
3163link; if possible, the indicated type of link should be used.
3164
3165
3166 Compulsory links
3167
3168These links should exist on all systems:
3169
3170/dev/fd /proc/self/fd symbolic File descriptors
3171/dev/stdin fd/0 symbolic stdin file descriptor
3172/dev/stdout fd/1 symbolic stdout file descriptor
3173/dev/stderr fd/2 symbolic stderr file descriptor
3174/dev/nfsd socksys symbolic Required by iBCS-2
3175/dev/X0R null symbolic Required by iBCS-2
3176
3177Note: /dev/X0R is <letter X>-<digit 0>-<letter R>.
3178
3179 Recommended links
3180
3181It is recommended that these links exist on all systems:
3182
3183/dev/core /proc/kcore symbolic Backward compatibility
3184/dev/ramdisk ram0 symbolic Backward compatibility
3185/dev/ftape qft0 symbolic Backward compatibility
3186/dev/bttv0 video0 symbolic Backward compatibility
3187/dev/radio radio0 symbolic Backward compatibility
3188/dev/i2o* /dev/i2o/* symbolic Backward compatibility
3189/dev/scd? sr? hard Alternate SCSI CD-ROM name
3190
3191 Locally defined links
3192
3193The following links may be established locally to conform to the
3194configuration of the system. This is merely a tabulation of existing
3195practice, and does not constitute a recommendation. However, if they
3196exist, they should have the following uses.
3197
3198/dev/mouse mouse port symbolic Current mouse device
3199/dev/tape tape device symbolic Current tape device
3200/dev/cdrom CD-ROM device symbolic Current CD-ROM device
3201/dev/cdwriter CD-writer symbolic Current CD-writer device
3202/dev/scanner scanner symbolic Current scanner device
3203/dev/modem modem port symbolic Current dialout device
3204/dev/root root device symbolic Current root filesystem
3205/dev/swap swap device symbolic Current swap device
3206
3207/dev/modem should not be used for a modem which supports dialin as
3208well as dialout, as it tends to cause lock file problems. If it
3209exists, /dev/modem should point to the appropriate primary TTY device
3210(the use of the alternate callout devices is deprecated).
3211
3212For SCSI devices, /dev/tape and /dev/cdrom should point to the
3213``cooked'' devices (/dev/st* and /dev/sr*, respectively), whereas
3214/dev/cdwriter and /dev/scanner should point to the appropriate generic
3215SCSI devices (/dev/sg*).
3216
3217/dev/mouse may point to a primary serial TTY device, a hardware mouse
3218device, or a socket for a mouse driver program (e.g. /dev/gpmdata).
3219
3220 Sockets and pipes
3221
3222Non-transient sockets and named pipes may exist in /dev. Common entries are:
3223
3224/dev/printer socket lpd local socket
3225/dev/log socket syslog local socket
3226/dev/gpmdata socket gpm mouse multiplexer
3227
3228 Mount points
3229
3230The following names are reserved for mounting special filesystems
3231under /dev. These special filesystems provide kernel interfaces that
3232cannot be provided with standard device nodes.
3233
3234/dev/pts devpts PTY slave filesystem
3235/dev/shm tmpfs POSIX shared memory maintenance access
3236
3237 **** TERMINAL DEVICES
3238
3239Terminal, or TTY devices are a special class of character devices. A
3240terminal device is any device that could act as a controlling terminal
3241for a session; this includes virtual consoles, serial ports, and
3242pseudoterminals (PTYs).
3243
3244All terminal devices share a common set of capabilities known as line
fff9289b 3245disciplines; these include the common terminal line discipline as well
1da177e4
LT		 3246as SLIP and PPP modes.
3247
3248All terminal devices are named similarly; this section explains the
3249naming and use of the various types of TTYs. Note that the naming
3250conventions include several historical warts; some of these are
3251Linux-specific, some were inherited from other systems, and some
3252reflect Linux outgrowing a borrowed convention.
3253
3254A hash mark (#) in a device name is used here to indicate a decimal
3255number without leading zeroes.
3256
3257 Virtual consoles and the console device
3258
3259Virtual consoles are full-screen terminal displays on the system video
3260monitor. Virtual consoles are named /dev/tty#, with numbering
3261starting at /dev/tty1; /dev/tty0 is the current virtual console.
3262/dev/tty0 is the device that should be used to access the system video
3263card on those architectures for which the frame buffer devices
3264(/dev/fb*) are not applicable. Do not use /dev/console
3265for this purpose.
3266
3267The console device, /dev/console, is the device to which system
3268messages should be sent, and on which logins should be permitted in
3269single-user mode. Starting with Linux 2.1.71, /dev/console is managed
3270by the kernel; for previous versions it should be a symbolic link to
3271either /dev/tty0, a specific virtual console such as /dev/tty1, or to
3272a serial port primary (tty*, not cu*) device, depending on the
3273configuration of the system.
3274
3275 Serial ports
3276
3277Serial ports are RS-232 serial ports and any device which simulates
3278one, either in hardware (such as internal modems) or in software (such
3279as the ISDN driver.) Under Linux, each serial ports has two device
3280names, the primary or callin device and the alternate or callout one.
3281Each kind of device is indicated by a different letter. For any
3282letter X, the names of the devices are /dev/ttyX# and /dev/cux#,
3283respectively; for historical reasons, /dev/ttyS# and /dev/ttyC#
3284correspond to /dev/cua# and /dev/cub#. In the future, it should be
3285expected that multiple letters will be used; all letters will be upper
3286case for the "tty" device (e.g. /dev/ttyDP#) and lower case for the
3287"cu" device (e.g. /dev/cudp#).
3288
3289The names /dev/ttyQ# and /dev/cuq# are reserved for local use.
3290
3291The alternate devices provide for kernel-based exclusion and somewhat
3292different defaults than the primary devices. Their main purpose is to
3293allow the use of serial ports with programs with no inherent or broken
3294support for serial ports. Their use is deprecated, and they may be
3295removed from a future version of Linux.
3296
3297Arbitration of serial ports is provided by the use of lock files with
3298the names /var/lock/LCK..ttyX#. The contents of the lock file should
3299be the PID of the locking process as an ASCII number.
3300
3301It is common practice to install links such as /dev/modem
3302which point to serial ports. In order to ensure proper locking in the
3303presence of these links, it is recommended that software chase
3304symlinks and lock all possible names; additionally, it is recommended
3305that a lock file be installed with the corresponding alternate
3306device. In order to avoid deadlocks, it is recommended that the locks
3307are acquired in the following order, and released in the reverse:
3308
3309 1. The symbolic link name, if any (/var/lock/LCK..modem)
3310 2. The "tty" name (/var/lock/LCK..ttyS2)
3311 3. The alternate device name (/var/lock/LCK..cua2)
3312
3313In the case of nested symbolic links, the lock files should be
3314installed in the order the symlinks are resolved.
3315
3316Under no circumstances should an application hold a lock while waiting
3317for another to be released. In addition, applications which attempt
3318to create lock files for the corresponding alternate device names
3319should take into account the possibility of being used on a non-serial
3320port TTY, for which no alternate device would exist.
3321
3322 Pseudoterminals (PTYs)
3323
3324Pseudoterminals, or PTYs, are used to create login sessions or provide
fff9289b 3325other capabilities requiring a TTY line discipline (including SLIP or
1da177e4
LT		 3326PPP capability) to arbitrary data-generation processes. Each PTY has
3327a master side, named /dev/pty[p-za-e][0-9a-f], and a slave side, named
3328/dev/tty[p-za-e][0-9a-f]. The kernel arbitrates the use of PTYs by
3329allowing each master side to be opened only once.
3330
3331Once the master side has been opened, the corresponding slave device
3332can be used in the same manner as any TTY device. The master and
3333slave devices are connected by the kernel, generating the equivalent
3334of a bidirectional pipe with TTY capabilities.
3335
3336Recent versions of the Linux kernels and GNU libc contain support for
3337the System V/Unix98 naming scheme for PTYs, which assigns a common
3338device, /dev/ptmx, to all the masters (opening it will automatically
3339give you a previously unassigned PTY) and a subdirectory, /dev/pts,
3340for the slaves; the slaves are named with decimal integers (/dev/pts/#
3341in our notation). This removes the problem of exhausting the
3342namespace and enables the kernel to automatically create the device
3343nodes for the slaves on demand using the "devpts" filesystem.
3344
kernel source for telekom puls (alcatel/mediatek)