/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _dmasound_h_ /* * linux/sound/oss/dmasound/dmasound.h * * * Minor numbers for the sound driver. * * Unfortunately Creative called the codec chip of SB as a DSP. For this * reason the /dev/dsp is reserved for digitized audio use. There is a * device for true DSP processors but it will be called something else. * In v3.0 it's /dev/sndproc but this could be a temporary solution.
*/ #define _dmasound_h_
#include <linux/types.h>
#define SND_NDEVS 256 /* Number of supported devices */ #define SND_DEV_CTL 0 /* Control port /dev/mixer */ #define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
synthesizer and MIDI output) */ #define SND_DEV_MIDIN 2 /* Raw midi access */ #define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */ #define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */ #define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */ #define SND_DEV_STATUS 6 /* /dev/sndstat */ /* #7 not in use now. Was in 2.4. Free for use after v3.0. */ #define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */ #define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */ #define SND_DEV_PSS SND_DEV_SNDPROC
/* switch on various prinks */ #define DEBUG_DMASOUND 1
/* description of the set-up applies to either hard or soft settings */
typedefstruct { int format; /* AFMT_* */ int stereo; /* 0 = mono, 1 = stereo */ int size; /* 8/16 bit*/ int speed; /* speed */
} SETTINGS;
/* * Machine definitions
*/
typedefstruct { constchar *name; constchar *name2; struct module *owner; void *(*dma_alloc)(unsignedint, gfp_t); void (*dma_free)(void *, unsignedint); int (*irqinit)(void); void (*irqcleanup)(void); void (*init)(void); void (*silence)(void); int (*setFormat)(int); int (*setVolume)(int); int (*setBass)(int); int (*setTreble)(int); int (*setGain)(int); void (*play)(void); void (*record)(void); /* optional */ void (*mixer_init)(void); /* optional */ int (*mixer_ioctl)(u_int, u_long); /* optional */ int (*write_sq_setup)(void); /* optional */ int (*read_sq_setup)(void); /* optional */ int (*sq_open)(fmode_t); /* optional */ int (*state_info)(char *, size_t); /* optional */ void (*abort_read)(void); /* optional */ int min_dsp_speed; int max_dsp_speed; int version ; int hardware_afmts ; /* OSS says we only return h'ware info */ /* when queried via SNDCTL_DSP_GETFMTS */ int capabilities ; /* low-level reply to SNDCTL_DSP_GETCAPS */
SETTINGS default_hard ; /* open() or init() should set something valid */
SETTINGS default_soft ; /* you can make it look like old OSS, if you want to */
} MACHINE;
struct sound_settings {
MACHINE mach; /* machine dependent things */
SETTINGS hard; /* hardware settings */
SETTINGS soft; /* software settings */
SETTINGS dsp; /* /dev/dsp default settings */
TRANS *trans_write; /* supported translations */ int volume_left; /* volume (range is machine dependent) */ int volume_right; int bass; /* tone (range is machine dependent) */ int treble; int gain; int minDev; /* minor device number currently open */
spinlock_t lock;
};
/* * Sound queue stuff, the heart of the driver
*/
struct sound_queue { /* buffers allocated for this queue */ int numBufs; /* real limits on what the user can have */ int bufSize; /* in bytes */ char **buffers;
/* current parameters */ int locked ; /* params cannot be modified when != 0 */ int user_frags ; /* user requests this many */ int user_frag_size ; /* of this size */ int max_count; /* actual # fragments <= numBufs */ int block_size; /* internal block size in bytes */ int max_active; /* in-use fragments <= max_count */
/* it shouldn't be necessary to declare any of these volatile */ int front, rear, count; int rear_size; /* * The use of the playing field depends on the hardware * * Atari, PMac: The number of frames that are loaded/playing * * Amiga: Bit 0 is set: a frame is loaded * Bit 1 is set: a frame is playing
*/ int active;
wait_queue_head_t action_queue, open_queue, sync_queue; int non_blocking; int busy, syncing, xruns, died;
};
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