sound/oss/dmasound/dmasound_paula.c

   1 /*
   2  *  linux/sound/oss/dmasound/dmasound_paula.c
   3  *
   4  *  Amiga `Paula' DMA Sound Driver
   5  *
   6  *  See linux/sound/oss/dmasound/dmasound_core.c for copyright and credits
   7  *  prior to 28/01/2001
   8  *
   9  *  28/01/2001 [0.1] Iain Sandoe
  10  *                   - added versioning
  11  *                   - put in and populated the hardware_afmts field.
  12  *             [0.2] - put in SNDCTL_DSP_GETCAPS value.
  13  *             [0.3] - put in constraint on state buffer usage.
  14  *             [0.4] - put in default hard/soft settings
  15 */
  16
  17
  18 #include <linux/module.h>
  19 #include <linux/config.h>
  20 #include <linux/mm.h>
  21 #include <linux/init.h>
  22 #include <linux/ioport.h>
  23 #include <linux/soundcard.h>
  24 #include <linux/interrupt.h>
  25
  26 #include <asm/uaccess.h>
  27 #include <asm/setup.h>
  28 #include <asm/amigahw.h>
  29 #include <asm/amigaints.h>
  30 #include <asm/machdep.h>
  31
  32 #include "dmasound.h"
  33
  34 #define DMASOUND_PAULA_REVISION 0
  35 #define DMASOUND_PAULA_EDITION 4
  36
  37 #define custom amiga_custom
  38    /*
  39     *   The minimum period for audio depends on htotal (for OCS/ECS/AGA)
  40     *   (Imported from arch/m68k/amiga/amisound.c)
  41     */
  42
  43 extern volatile u_short amiga_audio_min_period;
  44
  45
  46    /*
  47     *   amiga_mksound() should be able to restore the period after beeping
  48     *   (Imported from arch/m68k/amiga/amisound.c)
  49     */
  50
  51 extern u_short amiga_audio_period;
  52
  53
  54    /*
  55     *   Audio DMA masks
  56     */
  57
  58 #define AMI_AUDIO_OFF   (DMAF_AUD0 | DMAF_AUD1 | DMAF_AUD2 | DMAF_AUD3)
  59 #define AMI_AUDIO_8     (DMAF_SETCLR | DMAF_MASTER | DMAF_AUD0 | DMAF_AUD1)
  60 #define AMI_AUDIO_14    (AMI_AUDIO_8 | DMAF_AUD2 | DMAF_AUD3)
  61
  62
  63     /*
  64      *  Helper pointers for 16(14)-bit sound
  65      */
  66
  67 static int write_sq_block_size_half, write_sq_block_size_quarter;
  68
  69
  70 /*** Low level stuff *********************************************************/
  71
  72
  73 static void *AmiAlloc(unsigned int size, gfp_t flags);
  74 static void AmiFree(void *obj, unsigned int size);
  75 static int AmiIrqInit(void);
  76 #ifdef MODULE
  77 static void AmiIrqCleanUp(void);
  78 #endif
  79 static void AmiSilence(void);
  80 static void AmiInit(void);
  81 static int AmiSetFormat(int format);
  82 static int AmiSetVolume(int volume);
  83 static int AmiSetTreble(int treble);
  84 static void AmiPlayNextFrame(int index);
  85 static void AmiPlay(void);
  86 static irqreturn_t AmiInterrupt(int irq, void *dummy, struct pt_regs *fp);
  87
  88 #ifdef CONFIG_HEARTBEAT
  89
  90     /*
  91      *  Heartbeat interferes with sound since the 7 kHz low-pass filter and the
  92      *  power LED are controlled by the same line.
  93      */
  94
  95 #ifdef CONFIG_APUS
  96 #define mach_heartbeat  ppc_md.heartbeat
  97 #endif
  98
  99 static void (*saved_heartbeat)(int) = NULL;
 100
 101 static inline void disable_heartbeat(void)
 102 {
 103         if (mach_heartbeat) {
 104             saved_heartbeat = mach_heartbeat;
 105             mach_heartbeat = NULL;
 106         }
 107         AmiSetTreble(dmasound.treble);
 108 }
 109
 110 static inline void enable_heartbeat(void)
 111 {
 112         if (saved_heartbeat)
 113             mach_heartbeat = saved_heartbeat;
 114 }
 115 #else /* !CONFIG_HEARTBEAT */
 116 #define disable_heartbeat()     do { } while (0)
 117 #define enable_heartbeat()      do { } while (0)
 118 #endif /* !CONFIG_HEARTBEAT */
 119
 120
 121 /*** Mid level stuff *********************************************************/
 122
 123 static void AmiMixerInit(void);
 124 static int AmiMixerIoctl(u_int cmd, u_long arg);
 125 static int AmiWriteSqSetup(void);
 126 static int AmiStateInfo(char *buffer, size_t space);
 127
 128
 129 /*** Translations ************************************************************/
 130
 131 /* ++TeSche: radically changed for new expanding purposes...
 132  *
 133  * These two routines now deal with copying/expanding/translating the samples
 134  * from user space into our buffer at the right frequency. They take care about
 135  * how much data there's actually to read, how much buffer space there is and
 136  * to convert samples into the right frequency/encoding. They will only work on
 137  * complete samples so it may happen they leave some bytes in the input stream
 138  * if the user didn't write a multiple of the current sample size. They both
 139  * return the number of bytes they've used from both streams so you may detect
 140  * such a situation. Luckily all programs should be able to cope with that.
 141  *
 142  * I think I've optimized anything as far as one can do in plain C, all
 143  * variables should fit in registers and the loops are really short. There's
 144  * one loop for every possible situation. Writing a more generalized and thus
 145  * parameterized loop would only produce slower code. Feel free to optimize
 146  * this in assembler if you like. :)
 147  *
 148  * I think these routines belong here because they're not yet really hardware
 149  * independent, especially the fact that the Falcon can play 16bit samples
 150  * only in stereo is hardcoded in both of them!
 151  *
 152  * ++geert: split in even more functions (one per format)
 153  */
 154
 155
 156     /*
 157      *  Native format
 158      */
 159
 160 static ssize_t ami_ct_s8(const u_char *userPtr, size_t userCount,
 161                          u_char frame[], ssize_t *frameUsed, ssize_t frameLeft)
 162 {
 163         ssize_t count, used;
 164
 165         if (!dmasound.soft.stereo) {
 166                 void *p = &frame[*frameUsed];
 167                 count = min_t(unsigned long, userCount, frameLeft) & ~1;
 168                 used = count;
 169                 if (copy_from_user(p, userPtr, count))
 170                         return -EFAULT;
 171         } else {
 172                 u_char *left = &frame[*frameUsed>>1];
 173                 u_char *right = left+write_sq_block_size_half;
 174                 count = min_t(unsigned long, userCount, frameLeft)>>1 & ~1;
 175                 used = count*2;
 176                 while (count > 0) {
 177                         if (get_user(*left++, userPtr++)
 178                             || get_user(*right++, userPtr++))
 179                                 return -EFAULT;
 180                         count--;
 181                 }
 182         }
 183         *frameUsed += used;
 184         return used;
 185 }
 186
 187
 188     /*
 189      *  Copy and convert 8 bit data
 190      */
 191
 192 #define GENERATE_AMI_CT8(funcname, convsample)                          \
 193 static ssize_t funcname(const u_char *userPtr, size_t userCount,        \
 194                         u_char frame[], ssize_t *frameUsed,             \
 195                         ssize_t frameLeft)                              \
 196 {                                                                       \
 197         ssize_t count, used;                                            \
 198                                                                         \
 199         if (!dmasound.soft.stereo) {                                    \
 200                 u_char *p = &frame[*frameUsed];                         \
 201                 count = min_t(size_t, userCount, frameLeft) & ~1;       \
 202                 used = count;                                           \
 203                 while (count > 0) {                                     \
 204                         u_char data;                                    \
 205                         if (get_user(data, userPtr++))                  \
 206                                 return -EFAULT;                         \
 207                         *p++ = convsample(data);                        \
 208                         count--;                                        \
 209                 }                                                       \
 210         } else {                                                        \
 211                 u_char *left = &frame[*frameUsed>>1];                   \
 212                 u_char *right = left+write_sq_block_size_half;          \
 213                 count = min_t(size_t, userCount, frameLeft)>>1 & ~1;    \
 214                 used = count*2;                                         \
 215                 while (count > 0) {                                     \
 216                         u_char data;                                    \
 217                         if (get_user(data, userPtr++))                  \
 218                                 return -EFAULT;                         \
 219                         *left++ = convsample(data);                     \
 220                         if (get_user(data, userPtr++))                  \
 221                                 return -EFAULT;                         \
 222                         *right++ = convsample(data);                    \
 223                         count--;                                        \
 224                 }                                                       \
 225         }                                                               \
 226         *frameUsed += used;                                             \
 227         return used;                                                    \
 228 }
 229
 230 #define AMI_CT_ULAW(x)  (dmasound_ulaw2dma8[(x)])
 231 #define AMI_CT_ALAW(x)  (dmasound_alaw2dma8[(x)])
 232 #define AMI_CT_U8(x)    ((x) ^ 0x80)
 233
 234 GENERATE_AMI_CT8(ami_ct_ulaw, AMI_CT_ULAW)
 235 GENERATE_AMI_CT8(ami_ct_alaw, AMI_CT_ALAW)
 236 GENERATE_AMI_CT8(ami_ct_u8, AMI_CT_U8)
 237
 238
 239     /*
 240      *  Copy and convert 16 bit data
 241      */
 242
 243 #define GENERATE_AMI_CT_16(funcname, convsample)                        \
 244 static ssize_t funcname(const u_char *userPtr, size_t userCount,        \
 245                         u_char frame[], ssize_t *frameUsed,             \
 246                         ssize_t frameLeft)                              \
 247 {                                                                       \
 248         ssize_t count, used;                                            \
 249         u_short data;                                                   \
 250                                                                         \
 251         if (!dmasound.soft.stereo) {                                    \
 252                 u_char *high = &frame[*frameUsed>>1];                   \
 253                 u_char *low = high+write_sq_block_size_half;            \
 254                 count = min_t(size_t, userCount, frameLeft)>>1 & ~1;    \
 255                 used = count*2;                                         \
 256                 while (count > 0) {                                     \
 257                         if (get_user(data, ((u_short *)userPtr)++))     \
 258                                 return -EFAULT;                         \
 259                         data = convsample(data);                        \
 260                         *high++ = data>>8;                              \
 261                         *low++ = (data>>2) & 0x3f;                      \
 262                         count--;                                        \
 263                 }                                                       \
 264         } else {                                                        \
 265                 u_char *lefth = &frame[*frameUsed>>2];                  \
 266                 u_char *leftl = lefth+write_sq_block_size_quarter;      \
 267                 u_char *righth = lefth+write_sq_block_size_half;        \
 268                 u_char *rightl = righth+write_sq_block_size_quarter;    \
 269                 count = min_t(size_t, userCount, frameLeft)>>2 & ~1;    \
 270                 used = count*4;                                         \
 271                 while (count > 0) {                                     \
 272                         if (get_user(data, ((u_short *)userPtr)++))     \
 273                                 return -EFAULT;                         \
 274                         data = convsample(data);                        \
 275                         *lefth++ = data>>8;                             \
 276                         *leftl++ = (data>>2) & 0x3f;                    \
 277                         if (get_user(data, ((u_short *)userPtr)++))     \
 278                                 return -EFAULT;                         \
 279                         data = convsample(data);                        \
 280                         *righth++ = data>>8;                            \
 281                         *rightl++ = (data>>2) & 0x3f;                   \
 282                         count--;                                        \
 283                 }                                                       \
 284         }                                                               \
 285         *frameUsed += used;                                             \
 286         return used;                                                    \
 287 }
 288
 289 #define AMI_CT_S16BE(x) (x)
 290 #define AMI_CT_U16BE(x) ((x) ^ 0x8000)
 291 #define AMI_CT_S16LE(x) (le2be16((x)))
 292 #define AMI_CT_U16LE(x) (le2be16((x)) ^ 0x8000)
 293
 294 GENERATE_AMI_CT_16(ami_ct_s16be, AMI_CT_S16BE)
 295 GENERATE_AMI_CT_16(ami_ct_u16be, AMI_CT_U16BE)
 296 GENERATE_AMI_CT_16(ami_ct_s16le, AMI_CT_S16LE)
 297 GENERATE_AMI_CT_16(ami_ct_u16le, AMI_CT_U16LE)
 298
 299
 300 static TRANS transAmiga = {
 301         .ct_ulaw        = ami_ct_ulaw,
 302         .ct_alaw        = ami_ct_alaw,
 303         .ct_s8          = ami_ct_s8,
 304         .ct_u8          = ami_ct_u8,
 305         .ct_s16be       = ami_ct_s16be,
 306         .ct_u16be       = ami_ct_u16be,
 307         .ct_s16le       = ami_ct_s16le,
 308         .ct_u16le       = ami_ct_u16le,
 309 };
 310
 311 /*** Low level stuff *********************************************************/
 312
 313 static inline void StopDMA(void)
 314 {
 315         custom.aud[0].audvol = custom.aud[1].audvol = 0;
 316         custom.aud[2].audvol = custom.aud[3].audvol = 0;
 317         custom.dmacon = AMI_AUDIO_OFF;
 318         enable_heartbeat();
 319 }
 320
 321 static void *AmiAlloc(unsigned int size, gfp_t flags)
 322 {
 323         return amiga_chip_alloc((long)size, "dmasound [Paula]");
 324 }
 325
 326 static void AmiFree(void *obj, unsigned int size)
 327 {
 328         amiga_chip_free (obj);
 329 }
 330
 331 static int __init AmiIrqInit(void)
 332 {
 333         /* turn off DMA for audio channels */
 334         StopDMA();
 335
 336         /* Register interrupt handler. */
 337         if (request_irq(IRQ_AMIGA_AUD0, AmiInterrupt, 0, "DMA sound",
 338                         AmiInterrupt))
 339                 return 0;
 340         return 1;
 341 }
 342
 343 #ifdef MODULE
 344 static void AmiIrqCleanUp(void)
 345 {
 346         /* turn off DMA for audio channels */
 347         StopDMA();
 348         /* release the interrupt */
 349         free_irq(IRQ_AMIGA_AUD0, AmiInterrupt);
 350 }
 351 #endif /* MODULE */
 352
 353 static void AmiSilence(void)
 354 {
 355         /* turn off DMA for audio channels */
 356         StopDMA();
 357 }
 358
 359
 360 static void AmiInit(void)
 361 {
 362         int period, i;
 363
 364         AmiSilence();
 365
 366         if (dmasound.soft.speed)
 367                 period = amiga_colorclock/dmasound.soft.speed-1;
 368         else
 369                 period = amiga_audio_min_period;
 370         dmasound.hard = dmasound.soft;
 371         dmasound.trans_write = &transAmiga;
 372
 373         if (period < amiga_audio_min_period) {
 374                 /* we would need to squeeze the sound, but we won't do that */
 375                 period = amiga_audio_min_period;
 376         } else if (period > 65535) {
 377                 period = 65535;
 378         }
 379         dmasound.hard.speed = amiga_colorclock/(period+1);
 380
 381         for (i = 0; i < 4; i++)
 382                 custom.aud[i].audper = period;
 383         amiga_audio_period = period;
 384 }
 385
 386
 387 static int AmiSetFormat(int format)
 388 {
 389         int size;
 390
 391         /* Amiga sound DMA supports 8bit and 16bit (pseudo 14 bit) modes */
 392
 393         switch (format) {
 394         case AFMT_QUERY:
 395                 return dmasound.soft.format;
 396         case AFMT_MU_LAW:
 397         case AFMT_A_LAW:
 398         case AFMT_U8:
 399         case AFMT_S8:
 400                 size = 8;
 401                 break;
 402         case AFMT_S16_BE:
 403         case AFMT_U16_BE:
 404         case AFMT_S16_LE:
 405         case AFMT_U16_LE:
 406                 size = 16;
 407                 break;
 408         default: /* :-) */
 409                 size = 8;
 410                 format = AFMT_S8;
 411         }
 412
 413         dmasound.soft.format = format;
 414         dmasound.soft.size = size;
 415         if (dmasound.minDev == SND_DEV_DSP) {
 416                 dmasound.dsp.format = format;
 417                 dmasound.dsp.size = dmasound.soft.size;
 418         }
 419         AmiInit();
 420
 421         return format;
 422 }
 423
 424
 425 #define VOLUME_VOXWARE_TO_AMI(v) \
 426         (((v) < 0) ? 0 : ((v) > 100) ? 64 : ((v) * 64)/100)
 427 #define VOLUME_AMI_TO_VOXWARE(v) ((v)*100/64)
 428
 429 static int AmiSetVolume(int volume)
 430 {
 431         dmasound.volume_left = VOLUME_VOXWARE_TO_AMI(volume & 0xff);
 432         custom.aud[0].audvol = dmasound.volume_left;
 433         dmasound.volume_right = VOLUME_VOXWARE_TO_AMI((volume & 0xff00) >> 8);
 434         custom.aud[1].audvol = dmasound.volume_right;
 435         if (dmasound.hard.size == 16) {
 436                 if (dmasound.volume_left == 64 && dmasound.volume_right == 64) {
 437                         custom.aud[2].audvol = 1;
 438                         custom.aud[3].audvol = 1;
 439                 } else {
 440                         custom.aud[2].audvol = 0;
 441                         custom.aud[3].audvol = 0;
 442                 }
 443         }
 444         return VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) |
 445                (VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8);
 446 }
 447
 448 static int AmiSetTreble(int treble)
 449 {
 450         dmasound.treble = treble;
 451         if (treble < 50)
 452                 ciaa.pra &= ~0x02;
 453         else
 454                 ciaa.pra |= 0x02;
 455         return treble;
 456 }
 457
 458
 459 #define AMI_PLAY_LOADED         1
 460 #define AMI_PLAY_PLAYING        2
 461 #define AMI_PLAY_MASK           3
 462
 463
 464 static void AmiPlayNextFrame(int index)
 465 {
 466         u_char *start, *ch0, *ch1, *ch2, *ch3;
 467         u_long size;
 468
 469         /* used by AmiPlay() if all doubts whether there really is something
 470          * to be played are already wiped out.
 471          */
 472         start = write_sq.buffers[write_sq.front];
 473         size = (write_sq.count == index ? write_sq.rear_size
 474                                         : write_sq.block_size)>>1;
 475
 476         if (dmasound.hard.stereo) {
 477                 ch0 = start;
 478                 ch1 = start+write_sq_block_size_half;
 479                 size >>= 1;
 480         } else {
 481                 ch0 = start;
 482                 ch1 = start;
 483         }
 484
 485         disable_heartbeat();
 486         custom.aud[0].audvol = dmasound.volume_left;
 487         custom.aud[1].audvol = dmasound.volume_right;
 488         if (dmasound.hard.size == 8) {
 489                 custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0);
 490                 custom.aud[0].audlen = size;
 491                 custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1);
 492                 custom.aud[1].audlen = size;
 493                 custom.dmacon = AMI_AUDIO_8;
 494         } else {
 495                 size >>= 1;
 496                 custom.aud[0].audlc = (u_short *)ZTWO_PADDR(ch0);
 497                 custom.aud[0].audlen = size;
 498                 custom.aud[1].audlc = (u_short *)ZTWO_PADDR(ch1);
 499                 custom.aud[1].audlen = size;
 500                 if (dmasound.volume_left == 64 && dmasound.volume_right == 64) {
 501                         /* We can play pseudo 14-bit only with the maximum volume */
 502                         ch3 = ch0+write_sq_block_size_quarter;
 503                         ch2 = ch1+write_sq_block_size_quarter;
 504                         custom.aud[2].audvol = 1;  /* we are being affected by the beeps */
 505                         custom.aud[3].audvol = 1;  /* restoring volume here helps a bit */
 506                         custom.aud[2].audlc = (u_short *)ZTWO_PADDR(ch2);
 507                         custom.aud[2].audlen = size;
 508                         custom.aud[3].audlc = (u_short *)ZTWO_PADDR(ch3);
 509                         custom.aud[3].audlen = size;
 510                         custom.dmacon = AMI_AUDIO_14;
 511                 } else {
 512                         custom.aud[2].audvol = 0;
 513                         custom.aud[3].audvol = 0;
 514                         custom.dmacon = AMI_AUDIO_8;
 515                 }
 516         }
 517         write_sq.front = (write_sq.front+1) % write_sq.max_count;
 518         write_sq.active |= AMI_PLAY_LOADED;
 519 }
 520
 521
 522 static void AmiPlay(void)
 523 {
 524         int minframes = 1;
 525
 526         custom.intena = IF_AUD0;
 527
 528         if (write_sq.active & AMI_PLAY_LOADED) {
 529                 /* There's already a frame loaded */
 530                 custom.intena = IF_SETCLR | IF_AUD0;
 531                 return;
 532         }
 533
 534         if (write_sq.active & AMI_PLAY_PLAYING)
 535                 /* Increase threshold: frame 1 is already being played */
 536                 minframes = 2;
 537
 538         if (write_sq.count < minframes) {
 539                 /* Nothing to do */
 540                 custom.intena = IF_SETCLR | IF_AUD0;
 541                 return;
 542         }
 543
 544         if (write_sq.count <= minframes &&
 545             write_sq.rear_size < write_sq.block_size && !write_sq.syncing) {
 546                 /* hmmm, the only existing frame is not
 547                  * yet filled and we're not syncing?
 548                  */
 549                 custom.intena = IF_SETCLR | IF_AUD0;
 550                 return;
 551         }
 552
 553         AmiPlayNextFrame(minframes);
 554
 555         custom.intena = IF_SETCLR | IF_AUD0;
 556 }
 557
 558
 559 static irqreturn_t AmiInterrupt(int irq, void *dummy, struct pt_regs *fp)
 560 {
 561         int minframes = 1;
 562
 563         custom.intena = IF_AUD0;
 564
 565         if (!write_sq.active) {
 566                 /* Playing was interrupted and sq_reset() has already cleared
 567                  * the sq variables, so better don't do anything here.
 568                  */
 569                 WAKE_UP(write_sq.sync_queue);
 570                 return IRQ_HANDLED;
 571         }
 572
 573         if (write_sq.active & AMI_PLAY_PLAYING) {
 574                 /* We've just finished a frame */
 575                 write_sq.count--;
 576                 WAKE_UP(write_sq.action_queue);
 577         }
 578
 579         if (write_sq.active & AMI_PLAY_LOADED)
 580                 /* Increase threshold: frame 1 is already being played */
 581                 minframes = 2;
 582
 583         /* Shift the flags */
 584         write_sq.active = (write_sq.active<<1) & AMI_PLAY_MASK;
 585
 586         if (!write_sq.active)
 587                 /* No frame is playing, disable audio DMA */
 588                 StopDMA();
 589
 590         custom.intena = IF_SETCLR | IF_AUD0;
 591
 592         if (write_sq.count >= minframes)
 593                 /* Try to play the next frame */
 594                 AmiPlay();
 595
 596         if (!write_sq.active)
 597                 /* Nothing to play anymore.
 598                    Wake up a process waiting for audio output to drain. */
 599                 WAKE_UP(write_sq.sync_queue);
 600         return IRQ_HANDLED;
 601 }
 602
 603 /*** Mid level stuff *********************************************************/
 604
 605
 606 /*
 607  * /dev/mixer abstraction
 608  */
 609
 610 static void __init AmiMixerInit(void)
 611 {
 612         dmasound.volume_left = 64;
 613         dmasound.volume_right = 64;
 614         custom.aud[0].audvol = dmasound.volume_left;
 615         custom.aud[3].audvol = 1;       /* For pseudo 14bit */
 616         custom.aud[1].audvol = dmasound.volume_right;
 617         custom.aud[2].audvol = 1;       /* For pseudo 14bit */
 618         dmasound.treble = 50;
 619 }
 620
 621 static int AmiMixerIoctl(u_int cmd, u_long arg)
 622 {
 623         int data;
 624         switch (cmd) {
 625             case SOUND_MIXER_READ_DEVMASK:
 626                     return IOCTL_OUT(arg, SOUND_MASK_VOLUME | SOUND_MASK_TREBLE);
 627             case SOUND_MIXER_READ_RECMASK:
 628                     return IOCTL_OUT(arg, 0);
 629             case SOUND_MIXER_READ_STEREODEVS:
 630                     return IOCTL_OUT(arg, SOUND_MASK_VOLUME);
 631             case SOUND_MIXER_READ_VOLUME:
 632                     return IOCTL_OUT(arg,
 633                             VOLUME_AMI_TO_VOXWARE(dmasound.volume_left) |
 634                             VOLUME_AMI_TO_VOXWARE(dmasound.volume_right) << 8);
 635             case SOUND_MIXER_WRITE_VOLUME:
 636                     IOCTL_IN(arg, data);
 637                     return IOCTL_OUT(arg, dmasound_set_volume(data));
 638             case SOUND_MIXER_READ_TREBLE:
 639                     return IOCTL_OUT(arg, dmasound.treble);
 640             case SOUND_MIXER_WRITE_TREBLE:
 641                     IOCTL_IN(arg, data);
 642                     return IOCTL_OUT(arg, dmasound_set_treble(data));
 643         }
 644         return -EINVAL;
 645 }
 646
 647
 648 static int AmiWriteSqSetup(void)
 649 {
 650         write_sq_block_size_half = write_sq.block_size>>1;
 651         write_sq_block_size_quarter = write_sq_block_size_half>>1;
 652         return 0;
 653 }
 654
 655
 656 static int AmiStateInfo(char *buffer, size_t space)
 657 {
 658         int len = 0;
 659         len += sprintf(buffer+len, "\tsound.volume_left = %d [0...64]\n",
 660                        dmasound.volume_left);
 661         len += sprintf(buffer+len, "\tsound.volume_right = %d [0...64]\n",
 662                        dmasound.volume_right);
 663         if (len >= space) {
 664                 printk(KERN_ERR "dmasound_paula: overlowed state buffer alloc.\n") ;
 665                 len = space ;
 666         }
 667         return len;
 668 }
 669
 670
 671 /*** Machine definitions *****************************************************/
 672
 673 static SETTINGS def_hard = {
 674         .format = AFMT_S8,
 675         .stereo = 0,
 676         .size   = 8,
 677         .speed  = 8000
 678 } ;
 679
 680 static SETTINGS def_soft = {
 681         .format = AFMT_U8,
 682         .stereo = 0,
 683         .size   = 8,
 684         .speed  = 8000
 685 } ;
 686
 687 static MACHINE machAmiga = {
 688         .name           = "Amiga",
 689         .name2          = "AMIGA",
 690         .owner          = THIS_MODULE,
 691         .dma_alloc      = AmiAlloc,
 692         .dma_free       = AmiFree,
 693         .irqinit        = AmiIrqInit,
 694 #ifdef MODULE
 695         .irqcleanup     = AmiIrqCleanUp,
 696 #endif /* MODULE */
 697         .init           = AmiInit,
 698         .silence        = AmiSilence,
 699         .setFormat      = AmiSetFormat,
 700         .setVolume      = AmiSetVolume,
 701         .setTreble      = AmiSetTreble,
 702         .play           = AmiPlay,
 703         .mixer_init     = AmiMixerInit,
 704         .mixer_ioctl    = AmiMixerIoctl,
 705         .write_sq_setup = AmiWriteSqSetup,
 706         .state_info     = AmiStateInfo,
 707         .min_dsp_speed  = 8000,
 708         .version        = ((DMASOUND_PAULA_REVISION<<8) | DMASOUND_PAULA_EDITION),
 709         .hardware_afmts = (AFMT_S8 | AFMT_S16_BE), /* h'ware-supported formats *only* here */
 710         .capabilities   = DSP_CAP_BATCH          /* As per SNDCTL_DSP_GETCAPS */
 711 };
 712
 713
 714 /*** Config & Setup **********************************************************/
 715
 716
 717 int __init dmasound_paula_init(void)
 718 {
 719         int err;
 720
 721         if (MACH_IS_AMIGA && AMIGAHW_PRESENT(AMI_AUDIO)) {
 722             if (!request_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40,
 723                                     "dmasound [Paula]"))
 724                 return -EBUSY;
 725             dmasound.mach = machAmiga;
 726             dmasound.mach.default_hard = def_hard ;
 727             dmasound.mach.default_soft = def_soft ;
 728             err = dmasound_init();
 729             if (err)
 730                 release_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40);
 731             return err;
 732         } else
 733             return -ENODEV;
 734 }
 735
 736 static void __exit dmasound_paula_cleanup(void)
 737 {
 738         dmasound_deinit();
 739         release_mem_region(CUSTOM_PHYSADDR+0xa0, 0x40);
 740 }
 741
 742 module_init(dmasound_paula_init);
 743 module_exit(dmasound_paula_cleanup);
 744 MODULE_LICENSE("GPL");