1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  *  Advanced Linux Sound Architecture - ALSA - Driver
4  *  Copyright (c) 1994-2003 by Jaroslav Kysela <perex@perex.cz>,
5  *                             Abramo Bagnara <abramo@alsa-project.org>
6  *
7  *
8  *   This program is free software; you can redistribute it and/or modify
9  *   it under the terms of the GNU General Public License as published by
10  *   the Free Software Foundation; either version 2 of the License, or
11  *   (at your option) any later version.
12  *
13  *   This program is distributed in the hope that it will be useful,
14  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *   GNU General Public License for more details.
17  *
18  *   You should have received a copy of the GNU General Public License
19  *   along with this program; if not, write to the Free Software
20  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
21  *
22  */
23 
24 #ifndef _UAPI__SOUND_ASOUND_H
25 #define _UAPI__SOUND_ASOUND_H
26 
27 #if defined(__KERNEL__) || defined(__linux__)
28 #include <linux/types.h>
29 #include <asm/byteorder.h>
30 #else
31 #include <endian.h>
32 #include <sys/ioctl.h>
33 #endif
34 
35 #ifndef __KERNEL__
36 #include <stdlib.h>
37 #include <time.h>
38 #endif
39 
40 /*
41  *  protocol version
42  */
43 
44 #define SNDRV_PROTOCOL_VERSION(major, minor, subminor) (((major)<<16)|((minor)<<8)|(subminor))
45 #define SNDRV_PROTOCOL_MAJOR(version) (((version)>>16)&0xffff)
46 #define SNDRV_PROTOCOL_MINOR(version) (((version)>>8)&0xff)
47 #define SNDRV_PROTOCOL_MICRO(version) ((version)&0xff)
48 #define SNDRV_PROTOCOL_INCOMPATIBLE(kversion, uversion) \
49 	(SNDRV_PROTOCOL_MAJOR(kversion) != SNDRV_PROTOCOL_MAJOR(uversion) || \
50 	 (SNDRV_PROTOCOL_MAJOR(kversion) == SNDRV_PROTOCOL_MAJOR(uversion) && \
51 	   SNDRV_PROTOCOL_MINOR(kversion) != SNDRV_PROTOCOL_MINOR(uversion)))
52 
53 /****************************************************************************
54  *                                                                          *
55  *        Digital audio interface					    *
56  *                                                                          *
57  ****************************************************************************/
58 
59 struct snd_aes_iec958 {
60 	unsigned char status[24];	/* AES/IEC958 channel status bits */
61 	unsigned char subcode[147];	/* AES/IEC958 subcode bits */
62 	unsigned char pad;		/* nothing */
63 	unsigned char dig_subframe[4];	/* AES/IEC958 subframe bits */
64 };
65 
66 /****************************************************************************
67  *                                                                          *
68  *        CEA-861 Audio InfoFrame. Used in HDMI and DisplayPort		    *
69  *                                                                          *
70  ****************************************************************************/
71 
72 struct snd_cea_861_aud_if {
73 	unsigned char db1_ct_cc; /* coding type and channel count */
74 	unsigned char db2_sf_ss; /* sample frequency and size */
75 	unsigned char db3; /* not used, all zeros */
76 	unsigned char db4_ca; /* channel allocation code */
77 	unsigned char db5_dminh_lsv; /* downmix inhibit & level-shit values */
78 };
79 
80 /****************************************************************************
81  *                                                                          *
82  *      Section for driver hardware dependent interface - /dev/snd/hw?      *
83  *                                                                          *
84  ****************************************************************************/
85 
86 #define SNDRV_HWDEP_VERSION		SNDRV_PROTOCOL_VERSION(1, 0, 1)
87 
88 enum {
89 	SNDRV_HWDEP_IFACE_OPL2 = 0,
90 	SNDRV_HWDEP_IFACE_OPL3,
91 	SNDRV_HWDEP_IFACE_OPL4,
92 	SNDRV_HWDEP_IFACE_SB16CSP,	/* Creative Signal Processor */
93 	SNDRV_HWDEP_IFACE_EMU10K1,	/* FX8010 processor in EMU10K1 chip */
94 	SNDRV_HWDEP_IFACE_YSS225,	/* Yamaha FX processor */
95 	SNDRV_HWDEP_IFACE_ICS2115,	/* Wavetable synth */
96 	SNDRV_HWDEP_IFACE_SSCAPE,	/* Ensoniq SoundScape ISA card (MC68EC000) */
97 	SNDRV_HWDEP_IFACE_VX,		/* Digigram VX cards */
98 	SNDRV_HWDEP_IFACE_MIXART,	/* Digigram miXart cards */
99 	SNDRV_HWDEP_IFACE_USX2Y,	/* Tascam US122, US224 & US428 usb */
100 	SNDRV_HWDEP_IFACE_EMUX_WAVETABLE, /* EmuX wavetable */
101 	SNDRV_HWDEP_IFACE_BLUETOOTH,	/* Bluetooth audio */
102 	SNDRV_HWDEP_IFACE_USX2Y_PCM,	/* Tascam US122, US224 & US428 rawusb pcm */
103 	SNDRV_HWDEP_IFACE_PCXHR,	/* Digigram PCXHR */
104 	SNDRV_HWDEP_IFACE_SB_RC,	/* SB Extigy/Audigy2NX remote control */
105 	SNDRV_HWDEP_IFACE_HDA,		/* HD-audio */
106 	SNDRV_HWDEP_IFACE_USB_STREAM,	/* direct access to usb stream */
107 	SNDRV_HWDEP_IFACE_FW_DICE,	/* TC DICE FireWire device */
108 	SNDRV_HWDEP_IFACE_FW_FIREWORKS,	/* Echo Audio Fireworks based device */
109 	SNDRV_HWDEP_IFACE_FW_BEBOB,	/* BridgeCo BeBoB based device */
110 	SNDRV_HWDEP_IFACE_FW_OXFW,	/* Oxford OXFW970/971 based device */
111 	SNDRV_HWDEP_IFACE_FW_DIGI00X,	/* Digidesign Digi 002/003 family */
112 	SNDRV_HWDEP_IFACE_FW_TASCAM,	/* TASCAM FireWire series */
113 	SNDRV_HWDEP_IFACE_LINE6,	/* Line6 USB processors */
114 	SNDRV_HWDEP_IFACE_FW_MOTU,	/* MOTU FireWire series */
115 	SNDRV_HWDEP_IFACE_FW_FIREFACE,	/* RME Fireface series */
116 
117 	/* Don't forget to change the following: */
118 	SNDRV_HWDEP_IFACE_LAST = SNDRV_HWDEP_IFACE_FW_FIREFACE
119 };
120 
121 struct snd_hwdep_info {
122 	unsigned int device;		/* WR: device number */
123 	int card;			/* R: card number */
124 	unsigned char id[64];		/* ID (user selectable) */
125 	unsigned char name[80];		/* hwdep name */
126 	int iface;			/* hwdep interface */
127 	unsigned char reserved[64];	/* reserved for future */
128 };
129 
130 /* generic DSP loader */
131 struct snd_hwdep_dsp_status {
132 	unsigned int version;		/* R: driver-specific version */
133 	unsigned char id[32];		/* R: driver-specific ID string */
134 	unsigned int num_dsps;		/* R: number of DSP images to transfer */
135 	unsigned int dsp_loaded;	/* R: bit flags indicating the loaded DSPs */
136 	unsigned int chip_ready;	/* R: 1 = initialization finished */
137 	unsigned char reserved[16];	/* reserved for future use */
138 };
139 
140 struct snd_hwdep_dsp_image {
141 	unsigned int index;		/* W: DSP index */
142 	unsigned char name[64];		/* W: ID (e.g. file name) */
143 	unsigned char __user *image;	/* W: binary image */
144 	size_t length;			/* W: size of image in bytes */
145 	unsigned long driver_data;	/* W: driver-specific data */
146 };
147 
148 #define SNDRV_HWDEP_IOCTL_PVERSION	_IOR ('H', 0x00, int)
149 #define SNDRV_HWDEP_IOCTL_INFO		_IOR ('H', 0x01, struct snd_hwdep_info)
150 #define SNDRV_HWDEP_IOCTL_DSP_STATUS	_IOR('H', 0x02, struct snd_hwdep_dsp_status)
151 #define SNDRV_HWDEP_IOCTL_DSP_LOAD	_IOW('H', 0x03, struct snd_hwdep_dsp_image)
152 
153 /*****************************************************************************
154  *                                                                           *
155  *             Digital Audio (PCM) interface - /dev/snd/pcm??                *
156  *                                                                           *
157  *****************************************************************************/
158 
159 #define SNDRV_PCM_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 15)
160 
161 typedef unsigned long snd_pcm_uframes_t;
162 typedef signed long snd_pcm_sframes_t;
163 
164 enum {
165 	SNDRV_PCM_CLASS_GENERIC = 0,	/* standard mono or stereo device */
166 	SNDRV_PCM_CLASS_MULTI,		/* multichannel device */
167 	SNDRV_PCM_CLASS_MODEM,		/* software modem class */
168 	SNDRV_PCM_CLASS_DIGITIZER,	/* digitizer class */
169 	/* Don't forget to change the following: */
170 	SNDRV_PCM_CLASS_LAST = SNDRV_PCM_CLASS_DIGITIZER,
171 };
172 
173 enum {
174 	SNDRV_PCM_SUBCLASS_GENERIC_MIX = 0, /* mono or stereo subdevices are mixed together */
175 	SNDRV_PCM_SUBCLASS_MULTI_MIX,	/* multichannel subdevices are mixed together */
176 	/* Don't forget to change the following: */
177 	SNDRV_PCM_SUBCLASS_LAST = SNDRV_PCM_SUBCLASS_MULTI_MIX,
178 };
179 
180 enum {
181 	SNDRV_PCM_STREAM_PLAYBACK = 0,
182 	SNDRV_PCM_STREAM_CAPTURE,
183 	SNDRV_PCM_STREAM_LAST = SNDRV_PCM_STREAM_CAPTURE,
184 };
185 
186 typedef int __bitwise snd_pcm_access_t;
187 #define	SNDRV_PCM_ACCESS_MMAP_INTERLEAVED	((__force snd_pcm_access_t) 0) /* interleaved mmap */
188 #define	SNDRV_PCM_ACCESS_MMAP_NONINTERLEAVED	((__force snd_pcm_access_t) 1) /* noninterleaved mmap */
189 #define	SNDRV_PCM_ACCESS_MMAP_COMPLEX		((__force snd_pcm_access_t) 2) /* complex mmap */
190 #define	SNDRV_PCM_ACCESS_RW_INTERLEAVED		((__force snd_pcm_access_t) 3) /* readi/writei */
191 #define	SNDRV_PCM_ACCESS_RW_NONINTERLEAVED	((__force snd_pcm_access_t) 4) /* readn/writen */
192 #define	SNDRV_PCM_ACCESS_LAST		SNDRV_PCM_ACCESS_RW_NONINTERLEAVED
193 
194 typedef int __bitwise snd_pcm_format_t;
195 #define	SNDRV_PCM_FORMAT_S8	((__force snd_pcm_format_t) 0)
196 #define	SNDRV_PCM_FORMAT_U8	((__force snd_pcm_format_t) 1)
197 #define	SNDRV_PCM_FORMAT_S16_LE	((__force snd_pcm_format_t) 2)
198 #define	SNDRV_PCM_FORMAT_S16_BE	((__force snd_pcm_format_t) 3)
199 #define	SNDRV_PCM_FORMAT_U16_LE	((__force snd_pcm_format_t) 4)
200 #define	SNDRV_PCM_FORMAT_U16_BE	((__force snd_pcm_format_t) 5)
201 #define	SNDRV_PCM_FORMAT_S24_LE	((__force snd_pcm_format_t) 6) /* low three bytes */
202 #define	SNDRV_PCM_FORMAT_S24_BE	((__force snd_pcm_format_t) 7) /* low three bytes */
203 #define	SNDRV_PCM_FORMAT_U24_LE	((__force snd_pcm_format_t) 8) /* low three bytes */
204 #define	SNDRV_PCM_FORMAT_U24_BE	((__force snd_pcm_format_t) 9) /* low three bytes */
205 #define	SNDRV_PCM_FORMAT_S32_LE	((__force snd_pcm_format_t) 10)
206 #define	SNDRV_PCM_FORMAT_S32_BE	((__force snd_pcm_format_t) 11)
207 #define	SNDRV_PCM_FORMAT_U32_LE	((__force snd_pcm_format_t) 12)
208 #define	SNDRV_PCM_FORMAT_U32_BE	((__force snd_pcm_format_t) 13)
209 #define	SNDRV_PCM_FORMAT_FLOAT_LE	((__force snd_pcm_format_t) 14) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
210 #define	SNDRV_PCM_FORMAT_FLOAT_BE	((__force snd_pcm_format_t) 15) /* 4-byte float, IEEE-754 32-bit, range -1.0 to 1.0 */
211 #define	SNDRV_PCM_FORMAT_FLOAT64_LE	((__force snd_pcm_format_t) 16) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
212 #define	SNDRV_PCM_FORMAT_FLOAT64_BE	((__force snd_pcm_format_t) 17) /* 8-byte float, IEEE-754 64-bit, range -1.0 to 1.0 */
213 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE ((__force snd_pcm_format_t) 18) /* IEC-958 subframe, Little Endian */
214 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE ((__force snd_pcm_format_t) 19) /* IEC-958 subframe, Big Endian */
215 #define	SNDRV_PCM_FORMAT_MU_LAW		((__force snd_pcm_format_t) 20)
216 #define	SNDRV_PCM_FORMAT_A_LAW		((__force snd_pcm_format_t) 21)
217 #define	SNDRV_PCM_FORMAT_IMA_ADPCM	((__force snd_pcm_format_t) 22)
218 #define	SNDRV_PCM_FORMAT_MPEG		((__force snd_pcm_format_t) 23)
219 #define	SNDRV_PCM_FORMAT_GSM		((__force snd_pcm_format_t) 24)
220 #define	SNDRV_PCM_FORMAT_S20_LE	((__force snd_pcm_format_t) 25) /* in four bytes, LSB justified */
221 #define	SNDRV_PCM_FORMAT_S20_BE	((__force snd_pcm_format_t) 26) /* in four bytes, LSB justified */
222 #define	SNDRV_PCM_FORMAT_U20_LE	((__force snd_pcm_format_t) 27) /* in four bytes, LSB justified */
223 #define	SNDRV_PCM_FORMAT_U20_BE	((__force snd_pcm_format_t) 28) /* in four bytes, LSB justified */
224 /* gap in the numbering for a future standard linear format */
225 #define	SNDRV_PCM_FORMAT_SPECIAL	((__force snd_pcm_format_t) 31)
226 #define	SNDRV_PCM_FORMAT_S24_3LE	((__force snd_pcm_format_t) 32)	/* in three bytes */
227 #define	SNDRV_PCM_FORMAT_S24_3BE	((__force snd_pcm_format_t) 33)	/* in three bytes */
228 #define	SNDRV_PCM_FORMAT_U24_3LE	((__force snd_pcm_format_t) 34)	/* in three bytes */
229 #define	SNDRV_PCM_FORMAT_U24_3BE	((__force snd_pcm_format_t) 35)	/* in three bytes */
230 #define	SNDRV_PCM_FORMAT_S20_3LE	((__force snd_pcm_format_t) 36)	/* in three bytes */
231 #define	SNDRV_PCM_FORMAT_S20_3BE	((__force snd_pcm_format_t) 37)	/* in three bytes */
232 #define	SNDRV_PCM_FORMAT_U20_3LE	((__force snd_pcm_format_t) 38)	/* in three bytes */
233 #define	SNDRV_PCM_FORMAT_U20_3BE	((__force snd_pcm_format_t) 39)	/* in three bytes */
234 #define	SNDRV_PCM_FORMAT_S18_3LE	((__force snd_pcm_format_t) 40)	/* in three bytes */
235 #define	SNDRV_PCM_FORMAT_S18_3BE	((__force snd_pcm_format_t) 41)	/* in three bytes */
236 #define	SNDRV_PCM_FORMAT_U18_3LE	((__force snd_pcm_format_t) 42)	/* in three bytes */
237 #define	SNDRV_PCM_FORMAT_U18_3BE	((__force snd_pcm_format_t) 43)	/* in three bytes */
238 #define	SNDRV_PCM_FORMAT_G723_24	((__force snd_pcm_format_t) 44) /* 8 samples in 3 bytes */
239 #define	SNDRV_PCM_FORMAT_G723_24_1B	((__force snd_pcm_format_t) 45) /* 1 sample in 1 byte */
240 #define	SNDRV_PCM_FORMAT_G723_40	((__force snd_pcm_format_t) 46) /* 8 Samples in 5 bytes */
241 #define	SNDRV_PCM_FORMAT_G723_40_1B	((__force snd_pcm_format_t) 47) /* 1 sample in 1 byte */
242 #define	SNDRV_PCM_FORMAT_DSD_U8		((__force snd_pcm_format_t) 48) /* DSD, 1-byte samples DSD (x8) */
243 #define	SNDRV_PCM_FORMAT_DSD_U16_LE	((__force snd_pcm_format_t) 49) /* DSD, 2-byte samples DSD (x16), little endian */
244 #define	SNDRV_PCM_FORMAT_DSD_U32_LE	((__force snd_pcm_format_t) 50) /* DSD, 4-byte samples DSD (x32), little endian */
245 #define	SNDRV_PCM_FORMAT_DSD_U16_BE	((__force snd_pcm_format_t) 51) /* DSD, 2-byte samples DSD (x16), big endian */
246 #define	SNDRV_PCM_FORMAT_DSD_U32_BE	((__force snd_pcm_format_t) 52) /* DSD, 4-byte samples DSD (x32), big endian */
247 #define	SNDRV_PCM_FORMAT_LAST		SNDRV_PCM_FORMAT_DSD_U32_BE
248 #define	SNDRV_PCM_FORMAT_FIRST		SNDRV_PCM_FORMAT_S8
249 
250 #ifdef SNDRV_LITTLE_ENDIAN
251 #define	SNDRV_PCM_FORMAT_S16		SNDRV_PCM_FORMAT_S16_LE
252 #define	SNDRV_PCM_FORMAT_U16		SNDRV_PCM_FORMAT_U16_LE
253 #define	SNDRV_PCM_FORMAT_S24		SNDRV_PCM_FORMAT_S24_LE
254 #define	SNDRV_PCM_FORMAT_U24		SNDRV_PCM_FORMAT_U24_LE
255 #define	SNDRV_PCM_FORMAT_S32		SNDRV_PCM_FORMAT_S32_LE
256 #define	SNDRV_PCM_FORMAT_U32		SNDRV_PCM_FORMAT_U32_LE
257 #define	SNDRV_PCM_FORMAT_FLOAT		SNDRV_PCM_FORMAT_FLOAT_LE
258 #define	SNDRV_PCM_FORMAT_FLOAT64	SNDRV_PCM_FORMAT_FLOAT64_LE
259 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE
260 #define	SNDRV_PCM_FORMAT_S20		SNDRV_PCM_FORMAT_S20_LE
261 #define	SNDRV_PCM_FORMAT_U20		SNDRV_PCM_FORMAT_U20_LE
262 #endif
263 #ifdef SNDRV_BIG_ENDIAN
264 #define	SNDRV_PCM_FORMAT_S16		SNDRV_PCM_FORMAT_S16_BE
265 #define	SNDRV_PCM_FORMAT_U16		SNDRV_PCM_FORMAT_U16_BE
266 #define	SNDRV_PCM_FORMAT_S24		SNDRV_PCM_FORMAT_S24_BE
267 #define	SNDRV_PCM_FORMAT_U24		SNDRV_PCM_FORMAT_U24_BE
268 #define	SNDRV_PCM_FORMAT_S32		SNDRV_PCM_FORMAT_S32_BE
269 #define	SNDRV_PCM_FORMAT_U32		SNDRV_PCM_FORMAT_U32_BE
270 #define	SNDRV_PCM_FORMAT_FLOAT		SNDRV_PCM_FORMAT_FLOAT_BE
271 #define	SNDRV_PCM_FORMAT_FLOAT64	SNDRV_PCM_FORMAT_FLOAT64_BE
272 #define	SNDRV_PCM_FORMAT_IEC958_SUBFRAME SNDRV_PCM_FORMAT_IEC958_SUBFRAME_BE
273 #define	SNDRV_PCM_FORMAT_S20		SNDRV_PCM_FORMAT_S20_BE
274 #define	SNDRV_PCM_FORMAT_U20		SNDRV_PCM_FORMAT_U20_BE
275 #endif
276 
277 typedef int __bitwise snd_pcm_subformat_t;
278 #define	SNDRV_PCM_SUBFORMAT_STD		((__force snd_pcm_subformat_t) 0)
279 #define	SNDRV_PCM_SUBFORMAT_LAST	SNDRV_PCM_SUBFORMAT_STD
280 
281 #define SNDRV_PCM_INFO_MMAP		0x00000001	/* hardware supports mmap */
282 #define SNDRV_PCM_INFO_MMAP_VALID	0x00000002	/* period data are valid during transfer */
283 #define SNDRV_PCM_INFO_DOUBLE		0x00000004	/* Double buffering needed for PCM start/stop */
284 #define SNDRV_PCM_INFO_BATCH		0x00000010	/* double buffering */
285 #define SNDRV_PCM_INFO_SYNC_APPLPTR	0x00000020	/* need the explicit sync of appl_ptr update */
286 #define SNDRV_PCM_INFO_INTERLEAVED	0x00000100	/* channels are interleaved */
287 #define SNDRV_PCM_INFO_NONINTERLEAVED	0x00000200	/* channels are not interleaved */
288 #define SNDRV_PCM_INFO_COMPLEX		0x00000400	/* complex frame organization (mmap only) */
289 #define SNDRV_PCM_INFO_BLOCK_TRANSFER	0x00010000	/* hardware transfer block of samples */
290 #define SNDRV_PCM_INFO_OVERRANGE	0x00020000	/* hardware supports ADC (capture) overrange detection */
291 #define SNDRV_PCM_INFO_RESUME		0x00040000	/* hardware supports stream resume after suspend */
292 #define SNDRV_PCM_INFO_PAUSE		0x00080000	/* pause ioctl is supported */
293 #define SNDRV_PCM_INFO_HALF_DUPLEX	0x00100000	/* only half duplex */
294 #define SNDRV_PCM_INFO_JOINT_DUPLEX	0x00200000	/* playback and capture stream are somewhat correlated */
295 #define SNDRV_PCM_INFO_SYNC_START	0x00400000	/* pcm support some kind of sync go */
296 #define SNDRV_PCM_INFO_NO_PERIOD_WAKEUP	0x00800000	/* period wakeup can be disabled */
297 #define SNDRV_PCM_INFO_HAS_WALL_CLOCK   0x01000000      /* (Deprecated)has audio wall clock for audio/system time sync */
298 #define SNDRV_PCM_INFO_HAS_LINK_ATIME              0x01000000  /* report hardware link audio time, reset on startup */
299 #define SNDRV_PCM_INFO_HAS_LINK_ABSOLUTE_ATIME     0x02000000  /* report absolute hardware link audio time, not reset on startup */
300 #define SNDRV_PCM_INFO_HAS_LINK_ESTIMATED_ATIME    0x04000000  /* report estimated link audio time */
301 #define SNDRV_PCM_INFO_HAS_LINK_SYNCHRONIZED_ATIME 0x08000000  /* report synchronized audio/system time */
302 
303 #define SNDRV_PCM_INFO_DRAIN_TRIGGER	0x40000000		/* internal kernel flag - trigger in drain */
304 #define SNDRV_PCM_INFO_FIFO_IN_FRAMES	0x80000000	/* internal kernel flag - FIFO size is in frames */
305 
306 #if (__BITS_PER_LONG == 32 && defined(__USE_TIME_BITS64)) || defined __KERNEL__
307 #define __SND_STRUCT_TIME64
308 #endif
309 
310 typedef int __bitwise snd_pcm_state_t;
311 #define	SNDRV_PCM_STATE_OPEN		((__force snd_pcm_state_t) 0) /* stream is open */
312 #define	SNDRV_PCM_STATE_SETUP		((__force snd_pcm_state_t) 1) /* stream has a setup */
313 #define	SNDRV_PCM_STATE_PREPARED	((__force snd_pcm_state_t) 2) /* stream is ready to start */
314 #define	SNDRV_PCM_STATE_RUNNING		((__force snd_pcm_state_t) 3) /* stream is running */
315 #define	SNDRV_PCM_STATE_XRUN		((__force snd_pcm_state_t) 4) /* stream reached an xrun */
316 #define	SNDRV_PCM_STATE_DRAINING	((__force snd_pcm_state_t) 5) /* stream is draining */
317 #define	SNDRV_PCM_STATE_PAUSED		((__force snd_pcm_state_t) 6) /* stream is paused */
318 #define	SNDRV_PCM_STATE_SUSPENDED	((__force snd_pcm_state_t) 7) /* hardware is suspended */
319 #define	SNDRV_PCM_STATE_DISCONNECTED	((__force snd_pcm_state_t) 8) /* hardware is disconnected */
320 #define	SNDRV_PCM_STATE_LAST		SNDRV_PCM_STATE_DISCONNECTED
321 
322 enum {
323 	SNDRV_PCM_MMAP_OFFSET_DATA = 0x00000000,
324 	SNDRV_PCM_MMAP_OFFSET_STATUS_OLD = 0x80000000,
325 	SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD = 0x81000000,
326 	SNDRV_PCM_MMAP_OFFSET_STATUS_NEW = 0x82000000,
327 	SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW = 0x83000000,
328 #ifdef __SND_STRUCT_TIME64
329 	SNDRV_PCM_MMAP_OFFSET_STATUS = SNDRV_PCM_MMAP_OFFSET_STATUS_NEW,
330 	SNDRV_PCM_MMAP_OFFSET_CONTROL = SNDRV_PCM_MMAP_OFFSET_CONTROL_NEW,
331 #else
332 	SNDRV_PCM_MMAP_OFFSET_STATUS = SNDRV_PCM_MMAP_OFFSET_STATUS_OLD,
333 	SNDRV_PCM_MMAP_OFFSET_CONTROL = SNDRV_PCM_MMAP_OFFSET_CONTROL_OLD,
334 #endif
335 };
336 
337 union snd_pcm_sync_id {
338 	unsigned char id[16];
339 	unsigned short id16[8];
340 	unsigned int id32[4];
341 };
342 
343 struct snd_pcm_info {
344 	unsigned int device;		/* RO/WR (control): device number */
345 	unsigned int subdevice;		/* RO/WR (control): subdevice number */
346 	int stream;			/* RO/WR (control): stream direction */
347 	int card;			/* R: card number */
348 	unsigned char id[64];		/* ID (user selectable) */
349 	unsigned char name[80];		/* name of this device */
350 	unsigned char subname[32];	/* subdevice name */
351 	int dev_class;			/* SNDRV_PCM_CLASS_* */
352 	int dev_subclass;		/* SNDRV_PCM_SUBCLASS_* */
353 	unsigned int subdevices_count;
354 	unsigned int subdevices_avail;
355 	union snd_pcm_sync_id sync;	/* hardware synchronization ID */
356 	unsigned char reserved[64];	/* reserved for future... */
357 };
358 
359 typedef int snd_pcm_hw_param_t;
360 #define	SNDRV_PCM_HW_PARAM_ACCESS	0	/* Access type */
361 #define	SNDRV_PCM_HW_PARAM_FORMAT	1	/* Format */
362 #define	SNDRV_PCM_HW_PARAM_SUBFORMAT	2	/* Subformat */
363 #define	SNDRV_PCM_HW_PARAM_FIRST_MASK	SNDRV_PCM_HW_PARAM_ACCESS
364 #define	SNDRV_PCM_HW_PARAM_LAST_MASK	SNDRV_PCM_HW_PARAM_SUBFORMAT
365 
366 #define	SNDRV_PCM_HW_PARAM_SAMPLE_BITS	8	/* Bits per sample */
367 #define	SNDRV_PCM_HW_PARAM_FRAME_BITS	9	/* Bits per frame */
368 #define	SNDRV_PCM_HW_PARAM_CHANNELS	10	/* Channels */
369 #define	SNDRV_PCM_HW_PARAM_RATE		11	/* Approx rate */
370 #define	SNDRV_PCM_HW_PARAM_PERIOD_TIME	12	/* Approx distance between
371 						 * interrupts in us
372 						 */
373 #define	SNDRV_PCM_HW_PARAM_PERIOD_SIZE	13	/* Approx frames between
374 						 * interrupts
375 						 */
376 #define	SNDRV_PCM_HW_PARAM_PERIOD_BYTES	14	/* Approx bytes between
377 						 * interrupts
378 						 */
379 #define	SNDRV_PCM_HW_PARAM_PERIODS	15	/* Approx interrupts per
380 						 * buffer
381 						 */
382 #define	SNDRV_PCM_HW_PARAM_BUFFER_TIME	16	/* Approx duration of buffer
383 						 * in us
384 						 */
385 #define	SNDRV_PCM_HW_PARAM_BUFFER_SIZE	17	/* Size of buffer in frames */
386 #define	SNDRV_PCM_HW_PARAM_BUFFER_BYTES	18	/* Size of buffer in bytes */
387 #define	SNDRV_PCM_HW_PARAM_TICK_TIME	19	/* Approx tick duration in us */
388 #define	SNDRV_PCM_HW_PARAM_FIRST_INTERVAL	SNDRV_PCM_HW_PARAM_SAMPLE_BITS
389 #define	SNDRV_PCM_HW_PARAM_LAST_INTERVAL	SNDRV_PCM_HW_PARAM_TICK_TIME
390 
391 #define SNDRV_PCM_HW_PARAMS_NORESAMPLE	(1<<0)	/* avoid rate resampling */
392 #define SNDRV_PCM_HW_PARAMS_EXPORT_BUFFER	(1<<1)	/* export buffer */
393 #define SNDRV_PCM_HW_PARAMS_NO_PERIOD_WAKEUP	(1<<2)	/* disable period wakeups */
394 
395 struct snd_interval {
396 	unsigned int min, max;
397 	unsigned int openmin:1,
398 		     openmax:1,
399 		     integer:1,
400 		     empty:1;
401 };
402 
403 #define SNDRV_MASK_MAX	256
404 
405 struct snd_mask {
406 	__u32 bits[(SNDRV_MASK_MAX+31)/32];
407 };
408 
409 struct snd_pcm_hw_params {
410 	unsigned int flags;
411 	struct snd_mask masks[SNDRV_PCM_HW_PARAM_LAST_MASK -
412 			       SNDRV_PCM_HW_PARAM_FIRST_MASK + 1];
413 	struct snd_mask mres[5];	/* reserved masks */
414 	struct snd_interval intervals[SNDRV_PCM_HW_PARAM_LAST_INTERVAL -
415 				        SNDRV_PCM_HW_PARAM_FIRST_INTERVAL + 1];
416 	struct snd_interval ires[9];	/* reserved intervals */
417 	unsigned int rmask;		/* W: requested masks */
418 	unsigned int cmask;		/* R: changed masks */
419 	unsigned int info;		/* R: Info flags for returned setup */
420 	unsigned int msbits;		/* R: used most significant bits */
421 	unsigned int rate_num;		/* R: rate numerator */
422 	unsigned int rate_den;		/* R: rate denominator */
423 	snd_pcm_uframes_t fifo_size;	/* R: chip FIFO size in frames */
424 	unsigned char reserved[64];	/* reserved for future */
425 };
426 
427 enum {
428 	SNDRV_PCM_TSTAMP_NONE = 0,
429 	SNDRV_PCM_TSTAMP_ENABLE,
430 	SNDRV_PCM_TSTAMP_LAST = SNDRV_PCM_TSTAMP_ENABLE,
431 };
432 
433 struct snd_pcm_sw_params {
434 	int tstamp_mode;			/* timestamp mode */
435 	unsigned int period_step;
436 	unsigned int sleep_min;			/* min ticks to sleep */
437 	snd_pcm_uframes_t avail_min;		/* min avail frames for wakeup */
438 	snd_pcm_uframes_t xfer_align;		/* obsolete: xfer size need to be a multiple */
439 	snd_pcm_uframes_t start_threshold;	/* min hw_avail frames for automatic start */
440 	snd_pcm_uframes_t stop_threshold;	/* min avail frames for automatic stop */
441 	snd_pcm_uframes_t silence_threshold;	/* min distance from noise for silence filling */
442 	snd_pcm_uframes_t silence_size;		/* silence block size */
443 	snd_pcm_uframes_t boundary;		/* pointers wrap point */
444 	unsigned int proto;			/* protocol version */
445 	unsigned int tstamp_type;		/* timestamp type (req. proto >= 2.0.12) */
446 	unsigned char reserved[56];		/* reserved for future */
447 };
448 
449 struct snd_pcm_channel_info {
450 	unsigned int channel;
451 	__kernel_off_t offset;		/* mmap offset */
452 	unsigned int first;		/* offset to first sample in bits */
453 	unsigned int step;		/* samples distance in bits */
454 };
455 
456 enum {
457 	/*
458 	 *  first definition for backwards compatibility only,
459 	 *  maps to wallclock/link time for HDAudio playback and DEFAULT/DMA time for everything else
460 	 */
461 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_COMPAT = 0,
462 
463 	/* timestamp definitions */
464 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_DEFAULT = 1,           /* DMA time, reported as per hw_ptr */
465 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK = 2,	           /* link time reported by sample or wallclock counter, reset on startup */
466 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_ABSOLUTE = 3,	   /* link time reported by sample or wallclock counter, not reset on startup */
467 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_ESTIMATED = 4,    /* link time estimated indirectly */
468 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED = 5, /* link time synchronized with system time */
469 	SNDRV_PCM_AUDIO_TSTAMP_TYPE_LAST = SNDRV_PCM_AUDIO_TSTAMP_TYPE_LINK_SYNCHRONIZED
470 };
471 
472 #ifndef __KERNEL__
473 /* explicit padding avoids incompatibility between i386 and x86-64 */
474 typedef struct { unsigned char pad[sizeof(time_t) - sizeof(int)]; } __time_pad;
475 
476 struct snd_pcm_status {
477 	snd_pcm_state_t state;		/* stream state */
478 	__time_pad pad1;		/* align to timespec */
479 	struct timespec trigger_tstamp;	/* time when stream was started/stopped/paused */
480 	struct timespec tstamp;		/* reference timestamp */
481 	snd_pcm_uframes_t appl_ptr;	/* appl ptr */
482 	snd_pcm_uframes_t hw_ptr;	/* hw ptr */
483 	snd_pcm_sframes_t delay;	/* current delay in frames */
484 	snd_pcm_uframes_t avail;	/* number of frames available */
485 	snd_pcm_uframes_t avail_max;	/* max frames available on hw since last status */
486 	snd_pcm_uframes_t overrange;	/* count of ADC (capture) overrange detections from last status */
487 	snd_pcm_state_t suspended_state; /* suspended stream state */
488 	__u32 audio_tstamp_data;	 /* needed for 64-bit alignment, used for configs/report to/from userspace */
489 	struct timespec audio_tstamp;	/* sample counter, wall clock, PHC or on-demand sync'ed */
490 	struct timespec driver_tstamp;	/* useful in case reference system tstamp is reported with delay */
491 	__u32 audio_tstamp_accuracy;	/* in ns units, only valid if indicated in audio_tstamp_data */
492 	unsigned char reserved[52-2*sizeof(struct timespec)]; /* must be filled with zero */
493 };
494 #endif
495 
496 /*
497  * For mmap operations, we need the 64-bit layout, both for compat mode,
498  * and for y2038 compatibility. For 64-bit applications, the two definitions
499  * are identical, so we keep the traditional version.
500  */
501 #ifdef __SND_STRUCT_TIME64
502 #define __snd_pcm_mmap_status64		snd_pcm_mmap_status
503 #define __snd_pcm_mmap_control64	snd_pcm_mmap_control
504 #define __snd_pcm_sync_ptr64		snd_pcm_sync_ptr
505 #ifdef __KERNEL__
506 #define __snd_timespec64		__kernel_timespec
507 #else
508 #define __snd_timespec64		timespec
509 #endif
510 struct __snd_timespec {
511 	__s32 tv_sec;
512 	__s32 tv_nsec;
513 };
514 #else
515 #define __snd_pcm_mmap_status		snd_pcm_mmap_status
516 #define __snd_pcm_mmap_control		snd_pcm_mmap_control
517 #define __snd_pcm_sync_ptr		snd_pcm_sync_ptr
518 #define __snd_timespec			timespec
519 struct __snd_timespec64 {
520 	__s64 tv_sec;
521 	__s64 tv_nsec;
522 };
523 
524 #endif
525 
526 struct __snd_pcm_mmap_status {
527 	snd_pcm_state_t state;		/* RO: state - SNDRV_PCM_STATE_XXXX */
528 	int pad1;			/* Needed for 64 bit alignment */
529 	snd_pcm_uframes_t hw_ptr;	/* RO: hw ptr (0...boundary-1) */
530 	struct __snd_timespec tstamp;	/* Timestamp */
531 	snd_pcm_state_t suspended_state; /* RO: suspended stream state */
532 	struct __snd_timespec audio_tstamp; /* from sample counter or wall clock */
533 };
534 
535 struct __snd_pcm_mmap_control {
536 	snd_pcm_uframes_t appl_ptr;	/* RW: appl ptr (0...boundary-1) */
537 	snd_pcm_uframes_t avail_min;	/* RW: min available frames for wakeup */
538 };
539 
540 #define SNDRV_PCM_SYNC_PTR_HWSYNC	(1<<0)	/* execute hwsync */
541 #define SNDRV_PCM_SYNC_PTR_APPL		(1<<1)	/* get appl_ptr from driver (r/w op) */
542 #define SNDRV_PCM_SYNC_PTR_AVAIL_MIN	(1<<2)	/* get avail_min from driver */
543 
544 struct __snd_pcm_sync_ptr {
545 	unsigned int flags;
546 	union {
547 		struct __snd_pcm_mmap_status status;
548 		unsigned char reserved[64];
549 	} s;
550 	union {
551 		struct __snd_pcm_mmap_control control;
552 		unsigned char reserved[64];
553 	} c;
554 };
555 
556 #if defined(__BYTE_ORDER) ? __BYTE_ORDER == __BIG_ENDIAN : defined(__BIG_ENDIAN)
557 typedef char __pad_before_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
558 typedef char __pad_after_uframe[0];
559 #endif
560 
561 #if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN)
562 typedef char __pad_before_uframe[0];
563 typedef char __pad_after_uframe[sizeof(__u64) - sizeof(snd_pcm_uframes_t)];
564 #endif
565 
566 struct __snd_pcm_mmap_status64 {
567 	snd_pcm_state_t state;		/* RO: state - SNDRV_PCM_STATE_XXXX */
568 	__u32 pad1;			/* Needed for 64 bit alignment */
569 	__pad_before_uframe __pad1;
570 	snd_pcm_uframes_t hw_ptr;	/* RO: hw ptr (0...boundary-1) */
571 	__pad_after_uframe __pad2;
572 	struct __snd_timespec64 tstamp;	/* Timestamp */
573 	snd_pcm_state_t suspended_state;/* RO: suspended stream state */
574 	__u32 pad3;			/* Needed for 64 bit alignment */
575 	struct __snd_timespec64 audio_tstamp; /* sample counter or wall clock */
576 };
577 
578 struct __snd_pcm_mmap_control64 {
579 	__pad_before_uframe __pad1;
580 	snd_pcm_uframes_t appl_ptr;	 /* RW: appl ptr (0...boundary-1) */
581 	__pad_before_uframe __pad2;
582 
583 	__pad_before_uframe __pad3;
584 	snd_pcm_uframes_t  avail_min;	 /* RW: min available frames for wakeup */
585 	__pad_after_uframe __pad4;
586 };
587 
588 struct __snd_pcm_sync_ptr64 {
589 	__u32 flags;
590 	__u32 pad1;
591 	union {
592 		struct __snd_pcm_mmap_status64 status;
593 		unsigned char reserved[64];
594 	} s;
595 	union {
596 		struct __snd_pcm_mmap_control64 control;
597 		unsigned char reserved[64];
598 	} c;
599 };
600 
601 struct snd_xferi {
602 	snd_pcm_sframes_t result;
603 	void __user *buf;
604 	snd_pcm_uframes_t frames;
605 };
606 
607 struct snd_xfern {
608 	snd_pcm_sframes_t result;
609 	void __user * __user *bufs;
610 	snd_pcm_uframes_t frames;
611 };
612 
613 enum {
614 	SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY = 0,	/* gettimeofday equivalent */
615 	SNDRV_PCM_TSTAMP_TYPE_MONOTONIC,	/* posix_clock_monotonic equivalent */
616 	SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW,    /* monotonic_raw (no NTP) */
617 	SNDRV_PCM_TSTAMP_TYPE_LAST = SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW,
618 };
619 
620 /* channel positions */
621 enum {
622 	SNDRV_CHMAP_UNKNOWN = 0,
623 	SNDRV_CHMAP_NA,		/* N/A, silent */
624 	SNDRV_CHMAP_MONO,	/* mono stream */
625 	/* this follows the alsa-lib mixer channel value + 3 */
626 	SNDRV_CHMAP_FL,		/* front left */
627 	SNDRV_CHMAP_FR,		/* front right */
628 	SNDRV_CHMAP_RL,		/* rear left */
629 	SNDRV_CHMAP_RR,		/* rear right */
630 	SNDRV_CHMAP_FC,		/* front center */
631 	SNDRV_CHMAP_LFE,	/* LFE */
632 	SNDRV_CHMAP_SL,		/* side left */
633 	SNDRV_CHMAP_SR,		/* side right */
634 	SNDRV_CHMAP_RC,		/* rear center */
635 	/* new definitions */
636 	SNDRV_CHMAP_FLC,	/* front left center */
637 	SNDRV_CHMAP_FRC,	/* front right center */
638 	SNDRV_CHMAP_RLC,	/* rear left center */
639 	SNDRV_CHMAP_RRC,	/* rear right center */
640 	SNDRV_CHMAP_FLW,	/* front left wide */
641 	SNDRV_CHMAP_FRW,	/* front right wide */
642 	SNDRV_CHMAP_FLH,	/* front left high */
643 	SNDRV_CHMAP_FCH,	/* front center high */
644 	SNDRV_CHMAP_FRH,	/* front right high */
645 	SNDRV_CHMAP_TC,		/* top center */
646 	SNDRV_CHMAP_TFL,	/* top front left */
647 	SNDRV_CHMAP_TFR,	/* top front right */
648 	SNDRV_CHMAP_TFC,	/* top front center */
649 	SNDRV_CHMAP_TRL,	/* top rear left */
650 	SNDRV_CHMAP_TRR,	/* top rear right */
651 	SNDRV_CHMAP_TRC,	/* top rear center */
652 	/* new definitions for UAC2 */
653 	SNDRV_CHMAP_TFLC,	/* top front left center */
654 	SNDRV_CHMAP_TFRC,	/* top front right center */
655 	SNDRV_CHMAP_TSL,	/* top side left */
656 	SNDRV_CHMAP_TSR,	/* top side right */
657 	SNDRV_CHMAP_LLFE,	/* left LFE */
658 	SNDRV_CHMAP_RLFE,	/* right LFE */
659 	SNDRV_CHMAP_BC,		/* bottom center */
660 	SNDRV_CHMAP_BLC,	/* bottom left center */
661 	SNDRV_CHMAP_BRC,	/* bottom right center */
662 	SNDRV_CHMAP_LAST = SNDRV_CHMAP_BRC,
663 };
664 
665 #define SNDRV_CHMAP_POSITION_MASK	0xffff
666 #define SNDRV_CHMAP_PHASE_INVERSE	(0x01 << 16)
667 #define SNDRV_CHMAP_DRIVER_SPEC		(0x02 << 16)
668 
669 #define SNDRV_PCM_IOCTL_PVERSION	_IOR('A', 0x00, int)
670 #define SNDRV_PCM_IOCTL_INFO		_IOR('A', 0x01, struct snd_pcm_info)
671 #define SNDRV_PCM_IOCTL_TSTAMP		_IOW('A', 0x02, int)
672 #define SNDRV_PCM_IOCTL_TTSTAMP		_IOW('A', 0x03, int)
673 #define SNDRV_PCM_IOCTL_USER_PVERSION	_IOW('A', 0x04, int)
674 #define SNDRV_PCM_IOCTL_HW_REFINE	_IOWR('A', 0x10, struct snd_pcm_hw_params)
675 #define SNDRV_PCM_IOCTL_HW_PARAMS	_IOWR('A', 0x11, struct snd_pcm_hw_params)
676 #define SNDRV_PCM_IOCTL_HW_FREE		_IO('A', 0x12)
677 #define SNDRV_PCM_IOCTL_SW_PARAMS	_IOWR('A', 0x13, struct snd_pcm_sw_params)
678 #define SNDRV_PCM_IOCTL_STATUS		_IOR('A', 0x20, struct snd_pcm_status)
679 #define SNDRV_PCM_IOCTL_DELAY		_IOR('A', 0x21, snd_pcm_sframes_t)
680 #define SNDRV_PCM_IOCTL_HWSYNC		_IO('A', 0x22)
681 #define __SNDRV_PCM_IOCTL_SYNC_PTR	_IOWR('A', 0x23, struct __snd_pcm_sync_ptr)
682 #define __SNDRV_PCM_IOCTL_SYNC_PTR64	_IOWR('A', 0x23, struct __snd_pcm_sync_ptr64)
683 #define SNDRV_PCM_IOCTL_SYNC_PTR	_IOWR('A', 0x23, struct snd_pcm_sync_ptr)
684 #define SNDRV_PCM_IOCTL_STATUS_EXT	_IOWR('A', 0x24, struct snd_pcm_status)
685 #define SNDRV_PCM_IOCTL_CHANNEL_INFO	_IOR('A', 0x32, struct snd_pcm_channel_info)
686 #define SNDRV_PCM_IOCTL_PREPARE		_IO('A', 0x40)
687 #define SNDRV_PCM_IOCTL_RESET		_IO('A', 0x41)
688 #define SNDRV_PCM_IOCTL_START		_IO('A', 0x42)
689 #define SNDRV_PCM_IOCTL_DROP		_IO('A', 0x43)
690 #define SNDRV_PCM_IOCTL_DRAIN		_IO('A', 0x44)
691 #define SNDRV_PCM_IOCTL_PAUSE		_IOW('A', 0x45, int)
692 #define SNDRV_PCM_IOCTL_REWIND		_IOW('A', 0x46, snd_pcm_uframes_t)
693 #define SNDRV_PCM_IOCTL_RESUME		_IO('A', 0x47)
694 #define SNDRV_PCM_IOCTL_XRUN		_IO('A', 0x48)
695 #define SNDRV_PCM_IOCTL_FORWARD		_IOW('A', 0x49, snd_pcm_uframes_t)
696 #define SNDRV_PCM_IOCTL_WRITEI_FRAMES	_IOW('A', 0x50, struct snd_xferi)
697 #define SNDRV_PCM_IOCTL_READI_FRAMES	_IOR('A', 0x51, struct snd_xferi)
698 #define SNDRV_PCM_IOCTL_WRITEN_FRAMES	_IOW('A', 0x52, struct snd_xfern)
699 #define SNDRV_PCM_IOCTL_READN_FRAMES	_IOR('A', 0x53, struct snd_xfern)
700 #define SNDRV_PCM_IOCTL_LINK		_IOW('A', 0x60, int)
701 #define SNDRV_PCM_IOCTL_UNLINK		_IO('A', 0x61)
702 
703 /*****************************************************************************
704  *                                                                           *
705  *                            MIDI v1.0 interface                            *
706  *                                                                           *
707  *****************************************************************************/
708 
709 /*
710  *  Raw MIDI section - /dev/snd/midi??
711  */
712 
713 #define SNDRV_RAWMIDI_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 1)
714 
715 enum {
716 	SNDRV_RAWMIDI_STREAM_OUTPUT = 0,
717 	SNDRV_RAWMIDI_STREAM_INPUT,
718 	SNDRV_RAWMIDI_STREAM_LAST = SNDRV_RAWMIDI_STREAM_INPUT,
719 };
720 
721 #define SNDRV_RAWMIDI_INFO_OUTPUT		0x00000001
722 #define SNDRV_RAWMIDI_INFO_INPUT		0x00000002
723 #define SNDRV_RAWMIDI_INFO_DUPLEX		0x00000004
724 
725 struct snd_rawmidi_info {
726 	unsigned int device;		/* RO/WR (control): device number */
727 	unsigned int subdevice;		/* RO/WR (control): subdevice number */
728 	int stream;			/* WR: stream */
729 	int card;			/* R: card number */
730 	unsigned int flags;		/* SNDRV_RAWMIDI_INFO_XXXX */
731 	unsigned char id[64];		/* ID (user selectable) */
732 	unsigned char name[80];		/* name of device */
733 	unsigned char subname[32];	/* name of active or selected subdevice */
734 	unsigned int subdevices_count;
735 	unsigned int subdevices_avail;
736 	unsigned char reserved[64];	/* reserved for future use */
737 };
738 
739 struct snd_rawmidi_params {
740 	int stream;
741 	size_t buffer_size;		/* queue size in bytes */
742 	size_t avail_min;		/* minimum avail bytes for wakeup */
743 	unsigned int no_active_sensing: 1; /* do not send active sensing byte in close() */
744 	unsigned char reserved[16];	/* reserved for future use */
745 };
746 
747 #ifndef __KERNEL__
748 struct snd_rawmidi_status {
749 	int stream;
750 	__time_pad pad1;
751 	struct timespec tstamp;		/* Timestamp */
752 	size_t avail;			/* available bytes */
753 	size_t xruns;			/* count of overruns since last status (in bytes) */
754 	unsigned char reserved[16];	/* reserved for future use */
755 };
756 #endif
757 
758 #define SNDRV_RAWMIDI_IOCTL_PVERSION	_IOR('W', 0x00, int)
759 #define SNDRV_RAWMIDI_IOCTL_INFO	_IOR('W', 0x01, struct snd_rawmidi_info)
760 #define SNDRV_RAWMIDI_IOCTL_PARAMS	_IOWR('W', 0x10, struct snd_rawmidi_params)
761 #define SNDRV_RAWMIDI_IOCTL_STATUS	_IOWR('W', 0x20, struct snd_rawmidi_status)
762 #define SNDRV_RAWMIDI_IOCTL_DROP	_IOW('W', 0x30, int)
763 #define SNDRV_RAWMIDI_IOCTL_DRAIN	_IOW('W', 0x31, int)
764 
765 /*
766  *  Timer section - /dev/snd/timer
767  */
768 
769 #define SNDRV_TIMER_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 7)
770 
771 enum {
772 	SNDRV_TIMER_CLASS_NONE = -1,
773 	SNDRV_TIMER_CLASS_SLAVE = 0,
774 	SNDRV_TIMER_CLASS_GLOBAL,
775 	SNDRV_TIMER_CLASS_CARD,
776 	SNDRV_TIMER_CLASS_PCM,
777 	SNDRV_TIMER_CLASS_LAST = SNDRV_TIMER_CLASS_PCM,
778 };
779 
780 /* slave timer classes */
781 enum {
782 	SNDRV_TIMER_SCLASS_NONE = 0,
783 	SNDRV_TIMER_SCLASS_APPLICATION,
784 	SNDRV_TIMER_SCLASS_SEQUENCER,		/* alias */
785 	SNDRV_TIMER_SCLASS_OSS_SEQUENCER,	/* alias */
786 	SNDRV_TIMER_SCLASS_LAST = SNDRV_TIMER_SCLASS_OSS_SEQUENCER,
787 };
788 
789 /* global timers (device member) */
790 #define SNDRV_TIMER_GLOBAL_SYSTEM	0
791 #define SNDRV_TIMER_GLOBAL_RTC		1	/* unused */
792 #define SNDRV_TIMER_GLOBAL_HPET		2
793 #define SNDRV_TIMER_GLOBAL_HRTIMER	3
794 
795 /* info flags */
796 #define SNDRV_TIMER_FLG_SLAVE		(1<<0)	/* cannot be controlled */
797 
798 struct snd_timer_id {
799 	int dev_class;
800 	int dev_sclass;
801 	int card;
802 	int device;
803 	int subdevice;
804 };
805 
806 struct snd_timer_ginfo {
807 	struct snd_timer_id tid;	/* requested timer ID */
808 	unsigned int flags;		/* timer flags - SNDRV_TIMER_FLG_* */
809 	int card;			/* card number */
810 	unsigned char id[64];		/* timer identification */
811 	unsigned char name[80];		/* timer name */
812 	unsigned long reserved0;	/* reserved for future use */
813 	unsigned long resolution;	/* average period resolution in ns */
814 	unsigned long resolution_min;	/* minimal period resolution in ns */
815 	unsigned long resolution_max;	/* maximal period resolution in ns */
816 	unsigned int clients;		/* active timer clients */
817 	unsigned char reserved[32];
818 };
819 
820 struct snd_timer_gparams {
821 	struct snd_timer_id tid;	/* requested timer ID */
822 	unsigned long period_num;	/* requested precise period duration (in seconds) - numerator */
823 	unsigned long period_den;	/* requested precise period duration (in seconds) - denominator */
824 	unsigned char reserved[32];
825 };
826 
827 struct snd_timer_gstatus {
828 	struct snd_timer_id tid;	/* requested timer ID */
829 	unsigned long resolution;	/* current period resolution in ns */
830 	unsigned long resolution_num;	/* precise current period resolution (in seconds) - numerator */
831 	unsigned long resolution_den;	/* precise current period resolution (in seconds) - denominator */
832 	unsigned char reserved[32];
833 };
834 
835 struct snd_timer_select {
836 	struct snd_timer_id id;	/* bind to timer ID */
837 	unsigned char reserved[32];	/* reserved */
838 };
839 
840 struct snd_timer_info {
841 	unsigned int flags;		/* timer flags - SNDRV_TIMER_FLG_* */
842 	int card;			/* card number */
843 	unsigned char id[64];		/* timer identificator */
844 	unsigned char name[80];		/* timer name */
845 	unsigned long reserved0;	/* reserved for future use */
846 	unsigned long resolution;	/* average period resolution in ns */
847 	unsigned char reserved[64];	/* reserved */
848 };
849 
850 #define SNDRV_TIMER_PSFLG_AUTO		(1<<0)	/* auto start, otherwise one-shot */
851 #define SNDRV_TIMER_PSFLG_EXCLUSIVE	(1<<1)	/* exclusive use, precise start/stop/pause/continue */
852 #define SNDRV_TIMER_PSFLG_EARLY_EVENT	(1<<2)	/* write early event to the poll queue */
853 
854 struct snd_timer_params {
855 	unsigned int flags;		/* flags - SNDRV_TIMER_PSFLG_* */
856 	unsigned int ticks;		/* requested resolution in ticks */
857 	unsigned int queue_size;	/* total size of queue (32-1024) */
858 	unsigned int reserved0;		/* reserved, was: failure locations */
859 	unsigned int filter;		/* event filter (bitmask of SNDRV_TIMER_EVENT_*) */
860 	unsigned char reserved[60];	/* reserved */
861 };
862 
863 #ifndef __KERNEL__
864 struct snd_timer_status {
865 	struct timespec tstamp;		/* Timestamp - last update */
866 	unsigned int resolution;	/* current period resolution in ns */
867 	unsigned int lost;		/* counter of master tick lost */
868 	unsigned int overrun;		/* count of read queue overruns */
869 	unsigned int queue;		/* used queue size */
870 	unsigned char reserved[64];	/* reserved */
871 };
872 #endif
873 
874 #define SNDRV_TIMER_IOCTL_PVERSION	_IOR('T', 0x00, int)
875 #define SNDRV_TIMER_IOCTL_NEXT_DEVICE	_IOWR('T', 0x01, struct snd_timer_id)
876 #define SNDRV_TIMER_IOCTL_TREAD_OLD	_IOW('T', 0x02, int)
877 #define SNDRV_TIMER_IOCTL_GINFO		_IOWR('T', 0x03, struct snd_timer_ginfo)
878 #define SNDRV_TIMER_IOCTL_GPARAMS	_IOW('T', 0x04, struct snd_timer_gparams)
879 #define SNDRV_TIMER_IOCTL_GSTATUS	_IOWR('T', 0x05, struct snd_timer_gstatus)
880 #define SNDRV_TIMER_IOCTL_SELECT	_IOW('T', 0x10, struct snd_timer_select)
881 #define SNDRV_TIMER_IOCTL_INFO		_IOR('T', 0x11, struct snd_timer_info)
882 #define SNDRV_TIMER_IOCTL_PARAMS	_IOW('T', 0x12, struct snd_timer_params)
883 #define SNDRV_TIMER_IOCTL_STATUS	_IOR('T', 0x14, struct snd_timer_status)
884 /* The following four ioctls are changed since 1.0.9 due to confliction */
885 #define SNDRV_TIMER_IOCTL_START		_IO('T', 0xa0)
886 #define SNDRV_TIMER_IOCTL_STOP		_IO('T', 0xa1)
887 #define SNDRV_TIMER_IOCTL_CONTINUE	_IO('T', 0xa2)
888 #define SNDRV_TIMER_IOCTL_PAUSE		_IO('T', 0xa3)
889 #define SNDRV_TIMER_IOCTL_TREAD64	_IOW('T', 0xa4, int)
890 
891 #if __BITS_PER_LONG == 64
892 #define SNDRV_TIMER_IOCTL_TREAD SNDRV_TIMER_IOCTL_TREAD_OLD
893 #else
894 #define SNDRV_TIMER_IOCTL_TREAD ((sizeof(__kernel_long_t) >= sizeof(time_t)) ? \
895 				 SNDRV_TIMER_IOCTL_TREAD_OLD : \
896 				 SNDRV_TIMER_IOCTL_TREAD64)
897 #endif
898 
899 struct snd_timer_read {
900 	unsigned int resolution;
901 	unsigned int ticks;
902 };
903 
904 enum {
905 	SNDRV_TIMER_EVENT_RESOLUTION = 0,	/* val = resolution in ns */
906 	SNDRV_TIMER_EVENT_TICK,			/* val = ticks */
907 	SNDRV_TIMER_EVENT_START,		/* val = resolution in ns */
908 	SNDRV_TIMER_EVENT_STOP,			/* val = 0 */
909 	SNDRV_TIMER_EVENT_CONTINUE,		/* val = resolution in ns */
910 	SNDRV_TIMER_EVENT_PAUSE,		/* val = 0 */
911 	SNDRV_TIMER_EVENT_EARLY,		/* val = 0, early event */
912 	SNDRV_TIMER_EVENT_SUSPEND,		/* val = 0 */
913 	SNDRV_TIMER_EVENT_RESUME,		/* val = resolution in ns */
914 	/* master timer events for slave timer instances */
915 	SNDRV_TIMER_EVENT_MSTART = SNDRV_TIMER_EVENT_START + 10,
916 	SNDRV_TIMER_EVENT_MSTOP = SNDRV_TIMER_EVENT_STOP + 10,
917 	SNDRV_TIMER_EVENT_MCONTINUE = SNDRV_TIMER_EVENT_CONTINUE + 10,
918 	SNDRV_TIMER_EVENT_MPAUSE = SNDRV_TIMER_EVENT_PAUSE + 10,
919 	SNDRV_TIMER_EVENT_MSUSPEND = SNDRV_TIMER_EVENT_SUSPEND + 10,
920 	SNDRV_TIMER_EVENT_MRESUME = SNDRV_TIMER_EVENT_RESUME + 10,
921 };
922 
923 #ifndef __KERNEL__
924 struct snd_timer_tread {
925 	int event;
926 	__time_pad pad1;
927 	struct timespec tstamp;
928 	unsigned int val;
929 	__time_pad pad2;
930 };
931 #endif
932 
933 /****************************************************************************
934  *                                                                          *
935  *        Section for driver control interface - /dev/snd/control?          *
936  *                                                                          *
937  ****************************************************************************/
938 
939 #define SNDRV_CTL_VERSION		SNDRV_PROTOCOL_VERSION(2, 0, 8)
940 
941 struct snd_ctl_card_info {
942 	int card;			/* card number */
943 	int pad;			/* reserved for future (was type) */
944 	unsigned char id[16];		/* ID of card (user selectable) */
945 	unsigned char driver[16];	/* Driver name */
946 	unsigned char name[32];		/* Short name of soundcard */
947 	unsigned char longname[80];	/* name + info text about soundcard */
948 	unsigned char reserved_[16];	/* reserved for future (was ID of mixer) */
949 	unsigned char mixername[80];	/* visual mixer identification */
950 	unsigned char components[128];	/* card components / fine identification, delimited with one space (AC97 etc..) */
951 };
952 
953 typedef int __bitwise snd_ctl_elem_type_t;
954 #define	SNDRV_CTL_ELEM_TYPE_NONE	((__force snd_ctl_elem_type_t) 0) /* invalid */
955 #define	SNDRV_CTL_ELEM_TYPE_BOOLEAN	((__force snd_ctl_elem_type_t) 1) /* boolean type */
956 #define	SNDRV_CTL_ELEM_TYPE_INTEGER	((__force snd_ctl_elem_type_t) 2) /* integer type */
957 #define	SNDRV_CTL_ELEM_TYPE_ENUMERATED	((__force snd_ctl_elem_type_t) 3) /* enumerated type */
958 #define	SNDRV_CTL_ELEM_TYPE_BYTES	((__force snd_ctl_elem_type_t) 4) /* byte array */
959 #define	SNDRV_CTL_ELEM_TYPE_IEC958	((__force snd_ctl_elem_type_t) 5) /* IEC958 (S/PDIF) setup */
960 #define	SNDRV_CTL_ELEM_TYPE_INTEGER64	((__force snd_ctl_elem_type_t) 6) /* 64-bit integer type */
961 #define	SNDRV_CTL_ELEM_TYPE_LAST	SNDRV_CTL_ELEM_TYPE_INTEGER64
962 
963 typedef int __bitwise snd_ctl_elem_iface_t;
964 #define	SNDRV_CTL_ELEM_IFACE_CARD	((__force snd_ctl_elem_iface_t) 0) /* global control */
965 #define	SNDRV_CTL_ELEM_IFACE_HWDEP	((__force snd_ctl_elem_iface_t) 1) /* hardware dependent device */
966 #define	SNDRV_CTL_ELEM_IFACE_MIXER	((__force snd_ctl_elem_iface_t) 2) /* virtual mixer device */
967 #define	SNDRV_CTL_ELEM_IFACE_PCM	((__force snd_ctl_elem_iface_t) 3) /* PCM device */
968 #define	SNDRV_CTL_ELEM_IFACE_RAWMIDI	((__force snd_ctl_elem_iface_t) 4) /* RawMidi device */
969 #define	SNDRV_CTL_ELEM_IFACE_TIMER	((__force snd_ctl_elem_iface_t) 5) /* timer device */
970 #define	SNDRV_CTL_ELEM_IFACE_SEQUENCER	((__force snd_ctl_elem_iface_t) 6) /* sequencer client */
971 #define	SNDRV_CTL_ELEM_IFACE_LAST	SNDRV_CTL_ELEM_IFACE_SEQUENCER
972 
973 #define SNDRV_CTL_ELEM_ACCESS_READ		(1<<0)
974 #define SNDRV_CTL_ELEM_ACCESS_WRITE		(1<<1)
975 #define SNDRV_CTL_ELEM_ACCESS_READWRITE		(SNDRV_CTL_ELEM_ACCESS_READ|SNDRV_CTL_ELEM_ACCESS_WRITE)
976 #define SNDRV_CTL_ELEM_ACCESS_VOLATILE		(1<<2)	/* control value may be changed without a notification */
977 // (1 << 3) is unused.
978 #define SNDRV_CTL_ELEM_ACCESS_TLV_READ		(1<<4)	/* TLV read is possible */
979 #define SNDRV_CTL_ELEM_ACCESS_TLV_WRITE		(1<<5)	/* TLV write is possible */
980 #define SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE	(SNDRV_CTL_ELEM_ACCESS_TLV_READ|SNDRV_CTL_ELEM_ACCESS_TLV_WRITE)
981 #define SNDRV_CTL_ELEM_ACCESS_TLV_COMMAND	(1<<6)	/* TLV command is possible */
982 #define SNDRV_CTL_ELEM_ACCESS_INACTIVE		(1<<8)	/* control does actually nothing, but may be updated */
983 #define SNDRV_CTL_ELEM_ACCESS_LOCK		(1<<9)	/* write lock */
984 #define SNDRV_CTL_ELEM_ACCESS_OWNER		(1<<10)	/* write lock owner */
985 #define SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK	(1<<28)	/* kernel use a TLV callback */
986 #define SNDRV_CTL_ELEM_ACCESS_USER		(1<<29) /* user space element */
987 /* bits 30 and 31 are obsoleted (for indirect access) */
988 
989 /* for further details see the ACPI and PCI power management specification */
990 #define SNDRV_CTL_POWER_D0		0x0000	/* full On */
991 #define SNDRV_CTL_POWER_D1		0x0100	/* partial On */
992 #define SNDRV_CTL_POWER_D2		0x0200	/* partial On */
993 #define SNDRV_CTL_POWER_D3		0x0300	/* Off */
994 #define SNDRV_CTL_POWER_D3hot		(SNDRV_CTL_POWER_D3|0x0000)	/* Off, with power */
995 #define SNDRV_CTL_POWER_D3cold		(SNDRV_CTL_POWER_D3|0x0001)	/* Off, without power */
996 
997 #define SNDRV_CTL_ELEM_ID_NAME_MAXLEN	44
998 
999 struct snd_ctl_elem_id {
1000 	unsigned int numid;		/* numeric identifier, zero = invalid */
1001 	snd_ctl_elem_iface_t iface;	/* interface identifier */
1002 	unsigned int device;		/* device/client number */
1003 	unsigned int subdevice;		/* subdevice (substream) number */
1004 	unsigned char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];		/* ASCII name of item */
1005 	unsigned int index;		/* index of item */
1006 };
1007 
1008 struct snd_ctl_elem_list {
1009 	unsigned int offset;		/* W: first element ID to get */
1010 	unsigned int space;		/* W: count of element IDs to get */
1011 	unsigned int used;		/* R: count of element IDs set */
1012 	unsigned int count;		/* R: count of all elements */
1013 	struct snd_ctl_elem_id __user *pids; /* R: IDs */
1014 	unsigned char reserved[50];
1015 };
1016 
1017 struct snd_ctl_elem_info {
1018 	struct snd_ctl_elem_id id;	/* W: element ID */
1019 	snd_ctl_elem_type_t type;	/* R: value type - SNDRV_CTL_ELEM_TYPE_* */
1020 	unsigned int access;		/* R: value access (bitmask) - SNDRV_CTL_ELEM_ACCESS_* */
1021 	unsigned int count;		/* count of values */
1022 	__kernel_pid_t owner;		/* owner's PID of this control */
1023 	union {
1024 		struct {
1025 			long min;		/* R: minimum value */
1026 			long max;		/* R: maximum value */
1027 			long step;		/* R: step (0 variable) */
1028 		} integer;
1029 		struct {
1030 			long long min;		/* R: minimum value */
1031 			long long max;		/* R: maximum value */
1032 			long long step;		/* R: step (0 variable) */
1033 		} integer64;
1034 		struct {
1035 			unsigned int items;	/* R: number of items */
1036 			unsigned int item;	/* W: item number */
1037 			char name[64];		/* R: value name */
1038 			__u64 names_ptr;	/* W: names list (ELEM_ADD only) */
1039 			unsigned int names_length;
1040 		} enumerated;
1041 		unsigned char reserved[128];
1042 	} value;
1043 	unsigned char reserved[64];
1044 };
1045 
1046 struct snd_ctl_elem_value {
1047 	struct snd_ctl_elem_id id;	/* W: element ID */
1048 	unsigned int indirect: 1;	/* W: indirect access - obsoleted */
1049 	union {
1050 		union {
1051 			long value[128];
1052 			long *value_ptr;	/* obsoleted */
1053 		} integer;
1054 		union {
1055 			long long value[64];
1056 			long long *value_ptr;	/* obsoleted */
1057 		} integer64;
1058 		union {
1059 			unsigned int item[128];
1060 			unsigned int *item_ptr;	/* obsoleted */
1061 		} enumerated;
1062 		union {
1063 			unsigned char data[512];
1064 			unsigned char *data_ptr;	/* obsoleted */
1065 		} bytes;
1066 		struct snd_aes_iec958 iec958;
1067 	} value;		/* RO */
1068 	unsigned char reserved[128];
1069 };
1070 
1071 struct snd_ctl_tlv {
1072 	unsigned int numid;	/* control element numeric identification */
1073 	unsigned int length;	/* in bytes aligned to 4 */
1074 	unsigned int tlv[0];	/* first TLV */
1075 };
1076 
1077 #define SNDRV_CTL_IOCTL_PVERSION	_IOR('U', 0x00, int)
1078 #define SNDRV_CTL_IOCTL_CARD_INFO	_IOR('U', 0x01, struct snd_ctl_card_info)
1079 #define SNDRV_CTL_IOCTL_ELEM_LIST	_IOWR('U', 0x10, struct snd_ctl_elem_list)
1080 #define SNDRV_CTL_IOCTL_ELEM_INFO	_IOWR('U', 0x11, struct snd_ctl_elem_info)
1081 #define SNDRV_CTL_IOCTL_ELEM_READ	_IOWR('U', 0x12, struct snd_ctl_elem_value)
1082 #define SNDRV_CTL_IOCTL_ELEM_WRITE	_IOWR('U', 0x13, struct snd_ctl_elem_value)
1083 #define SNDRV_CTL_IOCTL_ELEM_LOCK	_IOW('U', 0x14, struct snd_ctl_elem_id)
1084 #define SNDRV_CTL_IOCTL_ELEM_UNLOCK	_IOW('U', 0x15, struct snd_ctl_elem_id)
1085 #define SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS _IOWR('U', 0x16, int)
1086 #define SNDRV_CTL_IOCTL_ELEM_ADD	_IOWR('U', 0x17, struct snd_ctl_elem_info)
1087 #define SNDRV_CTL_IOCTL_ELEM_REPLACE	_IOWR('U', 0x18, struct snd_ctl_elem_info)
1088 #define SNDRV_CTL_IOCTL_ELEM_REMOVE	_IOWR('U', 0x19, struct snd_ctl_elem_id)
1089 #define SNDRV_CTL_IOCTL_TLV_READ	_IOWR('U', 0x1a, struct snd_ctl_tlv)
1090 #define SNDRV_CTL_IOCTL_TLV_WRITE	_IOWR('U', 0x1b, struct snd_ctl_tlv)
1091 #define SNDRV_CTL_IOCTL_TLV_COMMAND	_IOWR('U', 0x1c, struct snd_ctl_tlv)
1092 #define SNDRV_CTL_IOCTL_HWDEP_NEXT_DEVICE _IOWR('U', 0x20, int)
1093 #define SNDRV_CTL_IOCTL_HWDEP_INFO	_IOR('U', 0x21, struct snd_hwdep_info)
1094 #define SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE	_IOR('U', 0x30, int)
1095 #define SNDRV_CTL_IOCTL_PCM_INFO	_IOWR('U', 0x31, struct snd_pcm_info)
1096 #define SNDRV_CTL_IOCTL_PCM_PREFER_SUBDEVICE _IOW('U', 0x32, int)
1097 #define SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE _IOWR('U', 0x40, int)
1098 #define SNDRV_CTL_IOCTL_RAWMIDI_INFO	_IOWR('U', 0x41, struct snd_rawmidi_info)
1099 #define SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE _IOW('U', 0x42, int)
1100 #define SNDRV_CTL_IOCTL_POWER		_IOWR('U', 0xd0, int)
1101 #define SNDRV_CTL_IOCTL_POWER_STATE	_IOR('U', 0xd1, int)
1102 
1103 /*
1104  *  Read interface.
1105  */
1106 
1107 enum sndrv_ctl_event_type {
1108 	SNDRV_CTL_EVENT_ELEM = 0,
1109 	SNDRV_CTL_EVENT_LAST = SNDRV_CTL_EVENT_ELEM,
1110 };
1111 
1112 #define SNDRV_CTL_EVENT_MASK_VALUE	(1<<0)	/* element value was changed */
1113 #define SNDRV_CTL_EVENT_MASK_INFO	(1<<1)	/* element info was changed */
1114 #define SNDRV_CTL_EVENT_MASK_ADD	(1<<2)	/* element was added */
1115 #define SNDRV_CTL_EVENT_MASK_TLV	(1<<3)	/* element TLV tree was changed */
1116 #define SNDRV_CTL_EVENT_MASK_REMOVE	(~0U)	/* element was removed */
1117 
1118 struct snd_ctl_event {
1119 	int type;	/* event type - SNDRV_CTL_EVENT_* */
1120 	union {
1121 		struct {
1122 			unsigned int mask;
1123 			struct snd_ctl_elem_id id;
1124 		} elem;
1125 		unsigned char data8[60];
1126 	} data;
1127 };
1128 
1129 /*
1130  *  Control names
1131  */
1132 
1133 #define SNDRV_CTL_NAME_NONE				""
1134 #define SNDRV_CTL_NAME_PLAYBACK				"Playback "
1135 #define SNDRV_CTL_NAME_CAPTURE				"Capture "
1136 
1137 #define SNDRV_CTL_NAME_IEC958_NONE			""
1138 #define SNDRV_CTL_NAME_IEC958_SWITCH			"Switch"
1139 #define SNDRV_CTL_NAME_IEC958_VOLUME			"Volume"
1140 #define SNDRV_CTL_NAME_IEC958_DEFAULT			"Default"
1141 #define SNDRV_CTL_NAME_IEC958_MASK			"Mask"
1142 #define SNDRV_CTL_NAME_IEC958_CON_MASK			"Con Mask"
1143 #define SNDRV_CTL_NAME_IEC958_PRO_MASK			"Pro Mask"
1144 #define SNDRV_CTL_NAME_IEC958_PCM_STREAM		"PCM Stream"
1145 #define SNDRV_CTL_NAME_IEC958(expl,direction,what)	"IEC958 " expl SNDRV_CTL_NAME_##direction SNDRV_CTL_NAME_IEC958_##what
1146 
1147 #endif /* _UAPI__SOUND_ASOUND_H */
1148