sound/oss/dmasound/dmasound.h

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