linux/sound/oss/dmasound/dmasound.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _dmasound_h_
   3/*
   4 *  linux/sound/oss/dmasound/dmasound.h
   5 *
   6 *
   7 *  Minor numbers for the sound driver.
   8 *
   9 *  Unfortunately Creative called the codec chip of SB as a DSP. For this
  10 *  reason the /dev/dsp is reserved for digitized audio use. There is a
  11 *  device for true DSP processors but it will be called something else.
  12 *  In v3.0 it's /dev/sndproc but this could be a temporary solution.
  13 */
  14#define _dmasound_h_
  15
  16#include <linux/types.h>
  17
  18#define SND_NDEVS       256     /* Number of supported devices */
  19#define SND_DEV_CTL     0       /* Control port /dev/mixer */
  20#define SND_DEV_SEQ     1       /* Sequencer output /dev/sequencer (FM
  21                                   synthesizer and MIDI output) */
  22#define SND_DEV_MIDIN   2       /* Raw midi access */
  23#define SND_DEV_DSP     3       /* Digitized voice /dev/dsp */
  24#define SND_DEV_AUDIO   4       /* Sparc compatible /dev/audio */
  25#define SND_DEV_DSP16   5       /* Like /dev/dsp but 16 bits/sample */
  26#define SND_DEV_STATUS  6       /* /dev/sndstat */
  27/* #7 not in use now. Was in 2.4. Free for use after v3.0. */
  28#define SND_DEV_SEQ2    8       /* /dev/sequencer, level 2 interface */
  29#define SND_DEV_SNDPROC 9       /* /dev/sndproc for programmable devices */
  30#define SND_DEV_PSS     SND_DEV_SNDPROC
  31
  32/* switch on various prinks */
  33#define DEBUG_DMASOUND 1
  34
  35#define MAX_AUDIO_DEV   5
  36#define MAX_MIXER_DEV   4
  37#define MAX_SYNTH_DEV   3
  38#define MAX_MIDI_DEV    6
  39#define MAX_TIMER_DEV   3
  40
  41#define MAX_CATCH_RADIUS        10
  42
  43#define le2be16(x)      (((x)<<8 & 0xff00) | ((x)>>8 & 0x00ff))
  44#define le2be16dbl(x)   (((x)<<8 & 0xff00ff00) | ((x)>>8 & 0x00ff00ff))
  45
  46#define IOCTL_IN(arg, ret) \
  47        do { int error = get_user(ret, (int __user *)(arg)); \
  48                if (error) return error; \
  49        } while (0)
  50#define IOCTL_OUT(arg, ret)     ioctl_return((int __user *)(arg), ret)
  51
  52static inline int ioctl_return(int __user *addr, int value)
  53{
  54        return value < 0 ? value : put_user(value, addr);
  55}
  56
  57
  58    /*
  59     *  Configuration
  60     */
  61
  62#undef HAS_8BIT_TABLES
  63
  64#if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
  65    defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
  66    defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)
  67#define HAS_8BIT_TABLES
  68#define MIN_BUFFERS     4
  69#define MIN_BUFSIZE     (1<<12) /* in bytes (- where does this come from ?) */
  70#define MIN_FRAG_SIZE   8       /* not 100% sure about this */
  71#define MAX_BUFSIZE     (1<<17) /* Limit for Amiga is 128 kb */
  72#define MAX_FRAG_SIZE   15      /* allow *4 for mono-8 => stereo-16 (for multi) */
  73
  74#else /* is pmac and multi is off */
  75
  76#define MIN_BUFFERS     2
  77#define MIN_BUFSIZE     (1<<8)  /* in bytes */
  78#define MIN_FRAG_SIZE   8
  79#define MAX_BUFSIZE     (1<<18) /* this is somewhat arbitrary for pmac */
  80#define MAX_FRAG_SIZE   16      /* need to allow *4 for mono-8 => stereo-16 */
  81#endif
  82
  83#define DEFAULT_N_BUFFERS 4
  84#define DEFAULT_BUFF_SIZE (1<<15)
  85
  86    /*
  87     *  Initialization
  88     */
  89
  90extern int dmasound_init(void);
  91#ifdef MODULE
  92extern void dmasound_deinit(void);
  93#else
  94#define dmasound_deinit()       do { } while (0)
  95#endif
  96
  97/* description of the set-up applies to either hard or soft settings */
  98
  99typedef struct {
 100    int format;         /* AFMT_* */
 101    int stereo;         /* 0 = mono, 1 = stereo */
 102    int size;           /* 8/16 bit*/
 103    int speed;          /* speed */
 104} SETTINGS;
 105
 106    /*
 107     *  Machine definitions
 108     */
 109
 110typedef struct {
 111    const char *name;
 112    const char *name2;
 113    struct module *owner;
 114    void *(*dma_alloc)(unsigned int, gfp_t);
 115    void (*dma_free)(void *, unsigned int);
 116    int (*irqinit)(void);
 117#ifdef MODULE
 118    void (*irqcleanup)(void);
 119#endif
 120    void (*init)(void);
 121    void (*silence)(void);
 122    int (*setFormat)(int);
 123    int (*setVolume)(int);
 124    int (*setBass)(int);
 125    int (*setTreble)(int);
 126    int (*setGain)(int);
 127    void (*play)(void);
 128    void (*record)(void);               /* optional */
 129    void (*mixer_init)(void);           /* optional */
 130    int (*mixer_ioctl)(u_int, u_long);  /* optional */
 131    int (*write_sq_setup)(void);        /* optional */
 132    int (*read_sq_setup)(void);         /* optional */
 133    int (*sq_open)(fmode_t);            /* optional */
 134    int (*state_info)(char *, size_t);  /* optional */
 135    void (*abort_read)(void);           /* optional */
 136    int min_dsp_speed;
 137    int max_dsp_speed;
 138    int version ;
 139    int hardware_afmts ;                /* OSS says we only return h'ware info */
 140                                        /* when queried via SNDCTL_DSP_GETFMTS */
 141    int capabilities ;          /* low-level reply to SNDCTL_DSP_GETCAPS */
 142    SETTINGS default_hard ;     /* open() or init() should set something valid */
 143    SETTINGS default_soft ;     /* you can make it look like old OSS, if you want to */
 144} MACHINE;
 145
 146    /*
 147     *  Low level stuff
 148     */
 149
 150typedef struct {
 151    ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 152    ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 153    ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 154    ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 155    ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 156    ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 157    ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 158    ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 159} TRANS;
 160
 161struct sound_settings {
 162    MACHINE mach;       /* machine dependent things */
 163    SETTINGS hard;      /* hardware settings */
 164    SETTINGS soft;      /* software settings */
 165    SETTINGS dsp;       /* /dev/dsp default settings */
 166    TRANS *trans_write; /* supported translations */
 167    int volume_left;    /* volume (range is machine dependent) */
 168    int volume_right;
 169    int bass;           /* tone (range is machine dependent) */
 170    int treble;
 171    int gain;
 172    int minDev;         /* minor device number currently open */
 173    spinlock_t lock;
 174};
 175
 176extern struct sound_settings dmasound;
 177
 178#ifdef HAS_8BIT_TABLES
 179extern char dmasound_ulaw2dma8[];
 180extern char dmasound_alaw2dma8[];
 181#endif
 182
 183    /*
 184     *  Mid level stuff
 185     */
 186
 187static inline int dmasound_set_volume(int volume)
 188{
 189        return dmasound.mach.setVolume(volume);
 190}
 191
 192static inline int dmasound_set_bass(int bass)
 193{
 194        return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
 195}
 196
 197static inline int dmasound_set_treble(int treble)
 198{
 199        return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
 200}
 201
 202static inline int dmasound_set_gain(int gain)
 203{
 204        return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
 205}
 206
 207
 208    /*
 209     * Sound queue stuff, the heart of the driver
 210     */
 211
 212struct sound_queue {
 213    /* buffers allocated for this queue */
 214    int numBufs;                /* real limits on what the user can have */
 215    int bufSize;                /* in bytes */
 216    char **buffers;
 217
 218    /* current parameters */
 219    int locked ;                /* params cannot be modified when != 0 */
 220    int user_frags ;            /* user requests this many */
 221    int user_frag_size ;        /* of this size */
 222    int max_count;              /* actual # fragments <= numBufs */
 223    int block_size;             /* internal block size in bytes */
 224    int max_active;             /* in-use fragments <= max_count */
 225
 226    /* it shouldn't be necessary to declare any of these volatile */
 227    int front, rear, count;
 228    int rear_size;
 229    /*
 230     *  The use of the playing field depends on the hardware
 231     *
 232     *  Atari, PMac: The number of frames that are loaded/playing
 233     *
 234     *  Amiga: Bit 0 is set: a frame is loaded
 235     *         Bit 1 is set: a frame is playing
 236     */
 237    int active;
 238    wait_queue_head_t action_queue, open_queue, sync_queue;
 239    int non_blocking;
 240    int busy, syncing, xruns, died;
 241};
 242
 243#define WAKE_UP(queue)          (wake_up_interruptible(&queue))
 244
 245extern struct sound_queue dmasound_write_sq;
 246#define write_sq        dmasound_write_sq
 247
 248extern int dmasound_catchRadius;
 249#define catchRadius     dmasound_catchRadius
 250
 251/* define the value to be put in the byte-swap reg in mac-io
 252   when we want it to swap for us.
 253*/
 254#define BS_VAL 1
 255
 256#define SW_INPUT_VOLUME_SCALE   4
 257#define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE)
 258
 259extern int expand_read_bal;     /* Balance factor for reading */
 260extern uint software_input_volume; /* software implemented recording volume! */
 261
 262#endif /* _dmasound_h_ */
 263
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