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