Release 4.7 sound/oss/dmasound/dmasound.h

#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


#define MAX_AUDIO_DEV	5

#define MAX_MIXER_DEV	4

#define MAX_SYNTH_DEV	3

#define MAX_MIDI_DEV	6

#define MAX_TIMER_DEV	3


#define MAX_CATCH_RADIUS	10


#define le2be16(x)	(((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))

#define le2be16dbl(x)	(((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))


#define IOCTL_IN(arg, ret) \
	do { int error = get_user(ret, (int __user *)(arg)); \
                if (error) return error; \
        } while (0)

#define IOCTL_OUT(arg, ret)	ioctl_return((int __user *)(arg), ret)



static inline int ioctl_return(int __user *addr, int value)
{
	return value < 0 ? value : put_user(value, addr);
}


    
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/*
     *  Configuration
     */


#undef HAS_8BIT_TABLES

#if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
    defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
    defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)

#define HAS_8BIT_TABLES

#define MIN_BUFFERS	4

#define MIN_BUFSIZE	(1<<12)	
/* in bytes (- where does this come from ?) */

#define MIN_FRAG_SIZE	8	
/* not 100% sure about this */

#define MAX_BUFSIZE	(1<<17)	
/* Limit for Amiga is 128 kb */

#define MAX_FRAG_SIZE	15	
/* allow *4 for mono-8 => stereo-16 (for multi) */

#else /* is pmac and multi is off */


#define MIN_BUFFERS	2

#define MIN_BUFSIZE	(1<<8)	
/* in bytes */

#define MIN_FRAG_SIZE	8

#define MAX_BUFSIZE	(1<<18)	
/* this is somewhat arbitrary for pmac */

#define MAX_FRAG_SIZE	16	
/* need to allow *4 for mono-8 => stereo-16 */
#endif


#define DEFAULT_N_BUFFERS 4

#define DEFAULT_BUFF_SIZE (1<<15)

    /*
     *  Initialization
     */

extern int dmasound_init(void);
#ifdef MODULE
extern void dmasound_deinit(void);
#else

#define dmasound_deinit()	do { } while (0)
#endif

/* description of the set-up applies to either hard or soft settings */

typedef struct {
    
int format;		/* AFMT_* */
    
int stereo;		/* 0 = mono, 1 = stereo */
    
int size;		/* 8/16 bit*/
    
int speed;		/* speed */
} 
SETTINGS;

    /*
     *  Machine definitions
     */

typedef struct {
    
const char *name;
    
const char *name2;
    
struct module *owner;
    
void *(*dma_alloc)(unsigned int, gfp_t);
    
void (*dma_free)(void *, unsigned int);
    
int (*irqinit)(void);
#ifdef MODULE
    
void (*irqcleanup)(void);
#endif
    
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;

    /*
     *  Low level stuff
     */

typedef struct {
    
ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
    
ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
} 
TRANS;


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;
};

extern struct sound_settings dmasound;

#ifdef HAS_8BIT_TABLES
extern char dmasound_ulaw2dma8[];
extern char dmasound_alaw2dma8[];
#endif

    /*
     *  Mid level stuff
     */



static inline int dmasound_set_volume(int volume)
{
	return dmasound.mach.setVolume(volume);
}

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static inline int dmasound_set_bass(int bass)
{
	return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
}

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static inline int dmasound_set_treble(int treble)
{
	return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
}

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static inline int dmasound_set_gain(int gain)
{
	return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
}


    
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/*
     * 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;
};


#define WAKE_UP(queue)		(wake_up_interruptible(&queue))

extern struct sound_queue dmasound_write_sq;

#define write_sq	dmasound_write_sq

extern int dmasound_catchRadius;

#define catchRadius	dmasound_catchRadius

/* define the value to be put in the byte-swap reg in mac-io
   when we want it to swap for us.
*/

#define BS_VAL 1


#define SW_INPUT_VOLUME_SCALE	4

#define SW_INPUT_VOLUME_DEFAULT	(128 / SW_INPUT_VOLUME_SCALE)

extern int expand_read_bal;	/* Balance factor for reading */
extern uint software_input_volume; /* software implemented recording volume! */

#endif /* _dmasound_h_ */
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Directory: sound/oss/dmasound

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