262 lines
7.9 KiB
C
262 lines
7.9 KiB
C
#ifndef _dmasound_h_
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/*
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* linux/sound/oss/dmasound/dmasound.h
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*
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*
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* Minor numbers for the sound driver.
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*
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* Unfortunately Creative called the codec chip of SB as a DSP. For this
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* reason the /dev/dsp is reserved for digitized audio use. There is a
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* device for true DSP processors but it will be called something else.
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* In v3.0 it's /dev/sndproc but this could be a temporary solution.
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*/
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#define _dmasound_h_
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#include <linux/types.h>
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#define SND_NDEVS 256 /* Number of supported devices */
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#define SND_DEV_CTL 0 /* Control port /dev/mixer */
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#define SND_DEV_SEQ 1 /* Sequencer output /dev/sequencer (FM
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synthesizer and MIDI output) */
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#define SND_DEV_MIDIN 2 /* Raw midi access */
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#define SND_DEV_DSP 3 /* Digitized voice /dev/dsp */
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#define SND_DEV_AUDIO 4 /* Sparc compatible /dev/audio */
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#define SND_DEV_DSP16 5 /* Like /dev/dsp but 16 bits/sample */
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#define SND_DEV_STATUS 6 /* /dev/sndstat */
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/* #7 not in use now. Was in 2.4. Free for use after v3.0. */
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#define SND_DEV_SEQ2 8 /* /dev/sequencer, level 2 interface */
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#define SND_DEV_SNDPROC 9 /* /dev/sndproc for programmable devices */
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#define SND_DEV_PSS SND_DEV_SNDPROC
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/* switch on various prinks */
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#define DEBUG_DMASOUND 1
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#define MAX_AUDIO_DEV 5
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#define MAX_MIXER_DEV 4
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#define MAX_SYNTH_DEV 3
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#define MAX_MIDI_DEV 6
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#define MAX_TIMER_DEV 3
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#define MAX_CATCH_RADIUS 10
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#define le2be16(x) (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))
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#define le2be16dbl(x) (((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))
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#define IOCTL_IN(arg, ret) \
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do { int error = get_user(ret, (int __user *)(arg)); \
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if (error) return error; \
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} while (0)
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#define IOCTL_OUT(arg, ret) ioctl_return((int __user *)(arg), ret)
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static inline int ioctl_return(int __user *addr, int value)
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{
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return value < 0 ? value : put_user(value, addr);
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}
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/*
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* Configuration
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*/
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#undef HAS_8BIT_TABLES
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#if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
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defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
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defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)
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#define HAS_8BIT_TABLES
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#define MIN_BUFFERS 4
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#define MIN_BUFSIZE (1<<12) /* in bytes (- where does this come from ?) */
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#define MIN_FRAG_SIZE 8 /* not 100% sure about this */
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#define MAX_BUFSIZE (1<<17) /* Limit for Amiga is 128 kb */
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#define MAX_FRAG_SIZE 15 /* allow *4 for mono-8 => stereo-16 (for multi) */
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#else /* is pmac and multi is off */
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#define MIN_BUFFERS 2
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#define MIN_BUFSIZE (1<<8) /* in bytes */
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#define MIN_FRAG_SIZE 8
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#define MAX_BUFSIZE (1<<18) /* this is somewhat arbitrary for pmac */
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#define MAX_FRAG_SIZE 16 /* need to allow *4 for mono-8 => stereo-16 */
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#endif
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#define DEFAULT_N_BUFFERS 4
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#define DEFAULT_BUFF_SIZE (1<<15)
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/*
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* Initialization
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*/
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extern int dmasound_init(void);
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#ifdef MODULE
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extern void dmasound_deinit(void);
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#else
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#define dmasound_deinit() do { } while (0)
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#endif
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/* description of the set-up applies to either hard or soft settings */
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typedef struct {
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int format; /* AFMT_* */
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int stereo; /* 0 = mono, 1 = stereo */
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int size; /* 8/16 bit*/
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int speed; /* speed */
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} SETTINGS;
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/*
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* Machine definitions
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*/
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typedef struct {
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const char *name;
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const char *name2;
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struct module *owner;
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void *(*dma_alloc)(unsigned int, gfp_t);
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void (*dma_free)(void *, unsigned int);
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int (*irqinit)(void);
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#ifdef MODULE
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void (*irqcleanup)(void);
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#endif
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void (*init)(void);
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void (*silence)(void);
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int (*setFormat)(int);
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int (*setVolume)(int);
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int (*setBass)(int);
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int (*setTreble)(int);
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int (*setGain)(int);
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void (*play)(void);
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void (*record)(void); /* optional */
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void (*mixer_init)(void); /* optional */
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int (*mixer_ioctl)(u_int, u_long); /* optional */
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int (*write_sq_setup)(void); /* optional */
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int (*read_sq_setup)(void); /* optional */
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int (*sq_open)(fmode_t); /* optional */
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int (*state_info)(char *, size_t); /* optional */
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void (*abort_read)(void); /* optional */
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int min_dsp_speed;
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int max_dsp_speed;
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int version ;
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int hardware_afmts ; /* OSS says we only return h'ware info */
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/* when queried via SNDCTL_DSP_GETFMTS */
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int capabilities ; /* low-level reply to SNDCTL_DSP_GETCAPS */
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SETTINGS default_hard ; /* open() or init() should set something valid */
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SETTINGS default_soft ; /* you can make it look like old OSS, if you want to */
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} MACHINE;
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/*
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* Low level stuff
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*/
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typedef struct {
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ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
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} TRANS;
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struct sound_settings {
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MACHINE mach; /* machine dependent things */
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SETTINGS hard; /* hardware settings */
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SETTINGS soft; /* software settings */
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SETTINGS dsp; /* /dev/dsp default settings */
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TRANS *trans_write; /* supported translations */
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int volume_left; /* volume (range is machine dependent) */
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int volume_right;
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int bass; /* tone (range is machine dependent) */
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int treble;
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int gain;
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int minDev; /* minor device number currently open */
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spinlock_t lock;
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};
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extern struct sound_settings dmasound;
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#ifdef HAS_8BIT_TABLES
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extern char dmasound_ulaw2dma8[];
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extern char dmasound_alaw2dma8[];
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#endif
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/*
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* Mid level stuff
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*/
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static inline int dmasound_set_volume(int volume)
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{
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return dmasound.mach.setVolume(volume);
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}
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static inline int dmasound_set_bass(int bass)
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{
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return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
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}
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static inline int dmasound_set_treble(int treble)
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{
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return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
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}
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static inline int dmasound_set_gain(int gain)
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{
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return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
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}
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/*
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* Sound queue stuff, the heart of the driver
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*/
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struct sound_queue {
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/* buffers allocated for this queue */
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int numBufs; /* real limits on what the user can have */
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int bufSize; /* in bytes */
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char **buffers;
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/* current parameters */
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int locked ; /* params cannot be modified when != 0 */
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int user_frags ; /* user requests this many */
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int user_frag_size ; /* of this size */
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int max_count; /* actual # fragments <= numBufs */
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int block_size; /* internal block size in bytes */
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int max_active; /* in-use fragments <= max_count */
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/* it shouldn't be necessary to declare any of these volatile */
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int front, rear, count;
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int rear_size;
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/*
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* The use of the playing field depends on the hardware
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*
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* Atari, PMac: The number of frames that are loaded/playing
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*
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* Amiga: Bit 0 is set: a frame is loaded
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* Bit 1 is set: a frame is playing
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*/
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int active;
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wait_queue_head_t action_queue, open_queue, sync_queue;
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int non_blocking;
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int busy, syncing, xruns, died;
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};
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#define WAKE_UP(queue) (wake_up_interruptible(&queue))
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extern struct sound_queue dmasound_write_sq;
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#define write_sq dmasound_write_sq
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extern int dmasound_catchRadius;
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#define catchRadius dmasound_catchRadius
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/* define the value to be put in the byte-swap reg in mac-io
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when we want it to swap for us.
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*/
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#define BS_VAL 1
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#define SW_INPUT_VOLUME_SCALE 4
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#define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE)
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extern int expand_read_bal; /* Balance factor for reading */
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extern uint software_input_volume; /* software implemented recording volume! */
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#endif /* _dmasound_h_ */
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