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 #include <linux/config.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
  52 static 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 #undef HAS_RECORD
  64
  65 #if defined(CONFIG_DMASOUND_ATARI) || defined(CONFIG_DMASOUND_ATARI_MODULE) ||\
  66     defined(CONFIG_DMASOUND_PAULA) || defined(CONFIG_DMASOUND_PAULA_MODULE) ||\
  67     defined(CONFIG_DMASOUND_Q40) || defined(CONFIG_DMASOUND_Q40_MODULE)
  68 #define HAS_8BIT_TABLES
  69 #define MIN_BUFFERS     4
  70 #define MIN_BUFSIZE     (1<<12) /* in bytes (- where does this come from ?) */
  71 #define MIN_FRAG_SIZE   8       /* not 100% sure about this */
  72 #define MAX_BUFSIZE     (1<<17) /* Limit for Amiga is 128 kb */
  73 #define MAX_FRAG_SIZE   15      /* allow *4 for mono-8 => stereo-16 (for multi) */
  74
  75 #else /* is pmac and multi is off */
  76
  77 #define MIN_BUFFERS     2
  78 #define MIN_BUFSIZE     (1<<8)  /* in bytes */
  79 #define MIN_FRAG_SIZE   8
  80 #define MAX_BUFSIZE     (1<<18) /* this is somewhat arbitrary for pmac */
  81 #define MAX_FRAG_SIZE   16      /* need to allow *4 for mono-8 => stereo-16 */
  82 #endif
  83
  84 #define DEFAULT_N_BUFFERS 4
  85 #define DEFAULT_BUFF_SIZE (1<<15)
  86
  87 #if defined(CONFIG_DMASOUND_PMAC) || defined(CONFIG_DMASOUND_PMAC_MODULE)
  88 #define HAS_RECORD
  89 #endif
  90
  91     /*
  92      *  Initialization
  93      */
  94
  95 extern int dmasound_init(void);
  96 #ifdef MODULE
  97 extern void dmasound_deinit(void);
  98 #else
  99 #define dmasound_deinit()       do { } while (0)
 100 #endif
 101
 102 /* description of the set-up applies to either hard or soft settings */
 103
 104 typedef struct {
 105     int format;         /* AFMT_* */
 106     int stereo;         /* 0 = mono, 1 = stereo */
 107     int size;           /* 8/16 bit*/
 108     int speed;          /* speed */
 109 } SETTINGS;
 110
 111     /*
 112      *  Machine definitions
 113      */
 114
 115 typedef struct {
 116     const char *name;
 117     const char *name2;
 118     struct module *owner;
 119     void *(*dma_alloc)(unsigned int, int);
 120     void (*dma_free)(void *, unsigned int);
 121     int (*irqinit)(void);
 122 #ifdef MODULE
 123     void (*irqcleanup)(void);
 124 #endif
 125     void (*init)(void);
 126     void (*silence)(void);
 127     int (*setFormat)(int);
 128     int (*setVolume)(int);
 129     int (*setBass)(int);
 130     int (*setTreble)(int);
 131     int (*setGain)(int);
 132     void (*play)(void);
 133     void (*record)(void);               /* optional */
 134     void (*mixer_init)(void);           /* optional */
 135     int (*mixer_ioctl)(u_int, u_long);  /* optional */
 136     int (*write_sq_setup)(void);        /* optional */
 137     int (*read_sq_setup)(void);         /* optional */
 138     int (*sq_open)(mode_t);             /* optional */
 139     int (*state_info)(char *, size_t);  /* optional */
 140     void (*abort_read)(void);           /* optional */
 141     int min_dsp_speed;
 142     int max_dsp_speed;
 143     int version ;
 144     int hardware_afmts ;                /* OSS says we only return h'ware info */
 145                                         /* when queried via SNDCTL_DSP_GETFMTS */
 146     int capabilities ;          /* low-level reply to SNDCTL_DSP_GETCAPS */
 147     SETTINGS default_hard ;     /* open() or init() should set something valid */
 148     SETTINGS default_soft ;     /* you can make it look like old OSS, if you want to */
 149 } MACHINE;
 150
 151     /*
 152      *  Low level stuff
 153      */
 154
 155 typedef struct {
 156     ssize_t (*ct_ulaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 157     ssize_t (*ct_alaw)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 158     ssize_t (*ct_s8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 159     ssize_t (*ct_u8)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 160     ssize_t (*ct_s16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 161     ssize_t (*ct_u16be)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 162     ssize_t (*ct_s16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 163     ssize_t (*ct_u16le)(const u_char __user *, size_t, u_char *, ssize_t *, ssize_t);
 164 } TRANS;
 165
 166 struct sound_settings {
 167     MACHINE mach;       /* machine dependent things */
 168     SETTINGS hard;      /* hardware settings */
 169     SETTINGS soft;      /* software settings */
 170     SETTINGS dsp;       /* /dev/dsp default settings */
 171     TRANS *trans_write; /* supported translations */
 172 #ifdef HAS_RECORD
 173     TRANS *trans_read;  /* supported translations */
 174 #endif
 175     int volume_left;    /* volume (range is machine dependent) */
 176     int volume_right;
 177     int bass;           /* tone (range is machine dependent) */
 178     int treble;
 179     int gain;
 180     int minDev;         /* minor device number currently open */
 181     spinlock_t lock;
 182 };
 183
 184 extern struct sound_settings dmasound;
 185
 186 #ifdef HAS_8BIT_TABLES
 187 extern char dmasound_ulaw2dma8[];
 188 extern char dmasound_alaw2dma8[];
 189 #endif
 190
 191     /*
 192      *  Mid level stuff
 193      */
 194
 195 static inline int dmasound_set_volume(int volume)
 196 {
 197         return dmasound.mach.setVolume(volume);
 198 }
 199
 200 static inline int dmasound_set_bass(int bass)
 201 {
 202         return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
 203 }
 204
 205 static inline int dmasound_set_treble(int treble)
 206 {
 207         return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
 208 }
 209
 210 static inline int dmasound_set_gain(int gain)
 211 {
 212         return dmasound.mach.setGain ? dmasound.mach.setGain(gain) : 100;
 213 }
 214
 215
 216     /*
 217      * Sound queue stuff, the heart of the driver
 218      */
 219
 220 struct sound_queue {
 221     /* buffers allocated for this queue */
 222     int numBufs;                /* real limits on what the user can have */
 223     int bufSize;                /* in bytes */
 224     char **buffers;
 225
 226     /* current parameters */
 227     int locked ;                /* params cannot be modified when != 0 */
 228     int user_frags ;            /* user requests this many */
 229     int user_frag_size ;        /* of this size */
 230     int max_count;              /* actual # fragments <= numBufs */
 231     int block_size;             /* internal block size in bytes */
 232     int max_active;             /* in-use fragments <= max_count */
 233
 234     /* it shouldn't be necessary to declare any of these volatile */
 235     int front, rear, count;
 236     int rear_size;
 237     /*
 238      *  The use of the playing field depends on the hardware
 239      *
 240      *  Atari, PMac: The number of frames that are loaded/playing
 241      *
 242      *  Amiga: Bit 0 is set: a frame is loaded
 243      *         Bit 1 is set: a frame is playing
 244      */
 245     int active;
 246     wait_queue_head_t action_queue, open_queue, sync_queue;
 247     int open_mode;
 248     int busy, syncing, xruns, died;
 249 };
 250
 251 #define SLEEP(queue)            interruptible_sleep_on_timeout(&queue, HZ)
 252 #define WAKE_UP(queue)          (wake_up_interruptible(&queue))
 253
 254 extern struct sound_queue dmasound_write_sq;
 255 #define write_sq        dmasound_write_sq
 256
 257 #ifdef HAS_RECORD
 258 extern struct sound_queue dmasound_read_sq;
 259 #define read_sq         dmasound_read_sq
 260 #endif
 261
 262 extern int dmasound_catchRadius;
 263 #define catchRadius     dmasound_catchRadius
 264
 265 /* define the value to be put in the byte-swap reg in mac-io
 266    when we want it to swap for us.
 267 */
 268 #define BS_VAL 1
 269
 270 #define SW_INPUT_VOLUME_SCALE   4
 271 #define SW_INPUT_VOLUME_DEFAULT (128 / SW_INPUT_VOLUME_SCALE)
 272
 273 extern int expand_bal;  /* Balance factor for expanding (not volume!) */
 274 extern int expand_read_bal;     /* Balance factor for reading */
 275 extern uint software_input_volume; /* software implemented recording volume! */
 276
 277 #endif /* _dmasound_h_ */