#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);
  }
  
  
      /*
       *  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);
  }
  
  static inline int dmasound_set_bass(int bass)
  {
  	return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
  }
  
  static inline int dmasound_set_treble(int treble)
  {
  	return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
  }
  
  static inline int dmasound_set_gain(int gain)
  {
  	return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
  }
  
  
      /*
       * 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_ */