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