sound/oss/dmasound/dmasound.h

   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
  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
  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
  90 extern int dmasound_init(void);
  91 #ifdef MODULE
  92 extern 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
  99 typedef 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
 110 typedef 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
 150 typedef 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
 161 struct 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
 176 extern struct sound_settings dmasound;
 177
 178 #ifdef HAS_8BIT_TABLES
 179 extern char dmasound_ulaw2dma8[];
 180 extern char dmasound_alaw2dma8[];
 181 #endif
 182
 183     /*
 184      *  Mid level stuff
 185      */
 186
 187 static inline int dmasound_set_volume(int volume)
 188 {
 189         return dmasound.mach.setVolume(volume);
 190 }
 191
 192 static inline int dmasound_set_bass(int bass)
 193 {
 194         return dmasound.mach.setBass ? dmasound.mach.setBass(bass) : 50;
 195 }
 196
 197 static inline int dmasound_set_treble(int treble)
 198 {
 199         return dmasound.mach.setTreble ? dmasound.mach.setTreble(treble) : 50;
 200 }
 201
 202 static 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
 212 struct 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
 245 extern struct sound_queue dmasound_write_sq;
 246 #define write_sq        dmasound_write_sq
 247
 248 extern 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
 259 extern int expand_read_bal;     /* Balance factor for reading */
 260 extern uint software_input_volume; /* software implemented recording volume! */
 261
 262 #endif /* _dmasound_h_ */