sound/sh/aica.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3 *
   4 * Copyright Adrian McMenamin 2005, 2006, 2007
   5 * <adrian@mcmen.demon.co.uk>
   6 * Requires firmware (BSD licenced) available from:
   7 * http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/
   8 * or the maintainer
   9 */
  10
  11 #include <linux/init.h>
  12 #include <linux/jiffies.h>
  13 #include <linux/slab.h>
  14 #include <linux/time.h>
  15 #include <linux/wait.h>
  16 #include <linux/module.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/firmware.h>
  19 #include <linux/timer.h>
  20 #include <linux/delay.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/io.h>
  23 #include <sound/core.h>
  24 #include <sound/control.h>
  25 #include <sound/pcm.h>
  26 #include <sound/initval.h>
  27 #include <sound/info.h>
  28 #include <asm/dma.h>
  29 #include <mach/sysasic.h>
  30 #include "aica.h"
  31
  32 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
  33 MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver");
  34 MODULE_LICENSE("GPL");
  35 MODULE_FIRMWARE("aica_firmware.bin");
  36
  37 /* module parameters */
  38 #define CARD_NAME "AICA"
  39 static int index = -1;
  40 static char *id;
  41 static bool enable = 1;
  42 module_param(index, int, 0444);
  43 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
  44 module_param(id, charp, 0444);
  45 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
  46 module_param(enable, bool, 0644);
  47 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
  48
  49 /* Simple platform device */
  50 static struct platform_device *pd;
  51 static struct resource aica_memory_space[2] = {
  52         {
  53          .name = "AICA ARM CONTROL",
  54          .start = ARM_RESET_REGISTER,
  55          .flags = IORESOURCE_MEM,
  56          .end = ARM_RESET_REGISTER + 3,
  57          },
  58         {
  59          .name = "AICA Sound RAM",
  60          .start = SPU_MEMORY_BASE,
  61          .flags = IORESOURCE_MEM,
  62          .end = SPU_MEMORY_BASE + 0x200000 - 1,
  63          },
  64 };
  65
  66 /* SPU specific functions */
  67 /* spu_write_wait - wait for G2-SH FIFO to clear */
  68 static void spu_write_wait(void)
  69 {
  70         int time_count;
  71         time_count = 0;
  72         while (1) {
  73                 if (!(readl(G2_FIFO) & 0x11))
  74                         break;
  75                 /* To ensure hardware failure doesn't wedge kernel */
  76                 time_count++;
  77                 if (time_count > 0x10000) {
  78                         pr_warn("WARNING: G2 FIFO appears to be blocked.\n");
  79                         break;
  80                 }
  81         }
  82 }
  83
  84 /* spu_memset - write to memory in SPU address space */
  85 static void spu_memset(u32 toi, u32 what, int length)
  86 {
  87         int i;
  88         unsigned long flags;
  89         if (snd_BUG_ON(length % 4))
  90                 return;
  91         for (i = 0; i < length; i++) {
  92                 if (!(i % 8))
  93                         spu_write_wait();
  94                 local_irq_save(flags);
  95                 writel(what, toi + SPU_MEMORY_BASE);
  96                 local_irq_restore(flags);
  97                 toi++;
  98         }
  99 }
 100
 101 /* spu_memload - write to SPU address space */
 102 static void spu_memload(u32 toi, const void *from, int length)
 103 {
 104         unsigned long flags;
 105         const u32 *froml = from;
 106         u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
 107         int i;
 108         u32 val;
 109         length = DIV_ROUND_UP(length, 4);
 110         spu_write_wait();
 111         for (i = 0; i < length; i++) {
 112                 if (!(i % 8))
 113                         spu_write_wait();
 114                 val = *froml;
 115                 local_irq_save(flags);
 116                 writel(val, to);
 117                 local_irq_restore(flags);
 118                 froml++;
 119                 to++;
 120         }
 121 }
 122
 123 /* spu_disable - set spu registers to stop sound output */
 124 static void spu_disable(void)
 125 {
 126         int i;
 127         unsigned long flags;
 128         u32 regval;
 129         spu_write_wait();
 130         regval = readl(ARM_RESET_REGISTER);
 131         regval |= 1;
 132         spu_write_wait();
 133         local_irq_save(flags);
 134         writel(regval, ARM_RESET_REGISTER);
 135         local_irq_restore(flags);
 136         for (i = 0; i < 64; i++) {
 137                 spu_write_wait();
 138                 regval = readl(SPU_REGISTER_BASE + (i * 0x80));
 139                 regval = (regval & ~0x4000) | 0x8000;
 140                 spu_write_wait();
 141                 local_irq_save(flags);
 142                 writel(regval, SPU_REGISTER_BASE + (i * 0x80));
 143                 local_irq_restore(flags);
 144         }
 145 }
 146
 147 /* spu_enable - set spu registers to enable sound output */
 148 static void spu_enable(void)
 149 {
 150         unsigned long flags;
 151         u32 regval = readl(ARM_RESET_REGISTER);
 152         regval &= ~1;
 153         spu_write_wait();
 154         local_irq_save(flags);
 155         writel(regval, ARM_RESET_REGISTER);
 156         local_irq_restore(flags);
 157 }
 158
 159 /*
 160  * Halt the sound processor, clear the memory,
 161  * load some default ARM7 code, and then restart ARM7
 162 */
 163 static void spu_reset(void)
 164 {
 165         unsigned long flags;
 166         spu_disable();
 167         spu_memset(0, 0, 0x200000 / 4);
 168         /* Put ARM7 in endless loop */
 169         local_irq_save(flags);
 170         __raw_writel(0xea000002, SPU_MEMORY_BASE);
 171         local_irq_restore(flags);
 172         spu_enable();
 173 }
 174
 175 /* aica_chn_start - write to spu to start playback */
 176 static void aica_chn_start(void)
 177 {
 178         unsigned long flags;
 179         spu_write_wait();
 180         local_irq_save(flags);
 181         writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
 182         local_irq_restore(flags);
 183 }
 184
 185 /* aica_chn_halt - write to spu to halt playback */
 186 static void aica_chn_halt(void)
 187 {
 188         unsigned long flags;
 189         spu_write_wait();
 190         local_irq_save(flags);
 191         writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
 192         local_irq_restore(flags);
 193 }
 194
 195 /* ALSA code below */
 196 static const struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
 197         .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
 198         .formats =
 199             (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
 200              SNDRV_PCM_FMTBIT_IMA_ADPCM),
 201         .rates = SNDRV_PCM_RATE_8000_48000,
 202         .rate_min = 8000,
 203         .rate_max = 48000,
 204         .channels_min = 1,
 205         .channels_max = 2,
 206         .buffer_bytes_max = AICA_BUFFER_SIZE,
 207         .period_bytes_min = AICA_PERIOD_SIZE,
 208         .period_bytes_max = AICA_PERIOD_SIZE,
 209         .periods_min = AICA_PERIOD_NUMBER,
 210         .periods_max = AICA_PERIOD_NUMBER,
 211 };
 212
 213 static int aica_dma_transfer(int channels, int buffer_size,
 214                              struct snd_pcm_substream *substream)
 215 {
 216         int q, err, period_offset;
 217         struct snd_card_aica *dreamcastcard;
 218         struct snd_pcm_runtime *runtime;
 219         unsigned long flags;
 220         err = 0;
 221         dreamcastcard = substream->pcm->private_data;
 222         period_offset = dreamcastcard->clicks;
 223         period_offset %= (AICA_PERIOD_NUMBER / channels);
 224         runtime = substream->runtime;
 225         for (q = 0; q < channels; q++) {
 226                 local_irq_save(flags);
 227                 err = dma_xfer(AICA_DMA_CHANNEL,
 228                                (unsigned long) (runtime->dma_area +
 229                                                 (AICA_BUFFER_SIZE * q) /
 230                                                 channels +
 231                                                 AICA_PERIOD_SIZE *
 232                                                 period_offset),
 233                                AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
 234                                AICA_PERIOD_SIZE * period_offset,
 235                                buffer_size / channels, AICA_DMA_MODE);
 236                 if (unlikely(err < 0)) {
 237                         local_irq_restore(flags);
 238                         break;
 239                 }
 240                 dma_wait_for_completion(AICA_DMA_CHANNEL);
 241                 local_irq_restore(flags);
 242         }
 243         return err;
 244 }
 245
 246 static void startup_aica(struct snd_card_aica *dreamcastcard)
 247 {
 248         spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 249                     dreamcastcard->channel, sizeof(struct aica_channel));
 250         aica_chn_start();
 251 }
 252
 253 static void run_spu_dma(struct work_struct *work)
 254 {
 255         int buffer_size;
 256         struct snd_pcm_runtime *runtime;
 257         struct snd_card_aica *dreamcastcard;
 258         dreamcastcard =
 259             container_of(work, struct snd_card_aica, spu_dma_work);
 260         runtime = dreamcastcard->substream->runtime;
 261         if (unlikely(dreamcastcard->dma_check == 0)) {
 262                 buffer_size =
 263                     frames_to_bytes(runtime, runtime->buffer_size);
 264                 if (runtime->channels > 1)
 265                         dreamcastcard->channel->flags |= 0x01;
 266                 aica_dma_transfer(runtime->channels, buffer_size,
 267                                   dreamcastcard->substream);
 268                 startup_aica(dreamcastcard);
 269                 dreamcastcard->clicks =
 270                     buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
 271                 return;
 272         } else {
 273                 aica_dma_transfer(runtime->channels,
 274                                   AICA_PERIOD_SIZE * runtime->channels,
 275                                   dreamcastcard->substream);
 276                 snd_pcm_period_elapsed(dreamcastcard->substream);
 277                 dreamcastcard->clicks++;
 278                 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
 279                         dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
 280                 if (snd_pcm_running(dreamcastcard->substream))
 281                         mod_timer(&dreamcastcard->timer, jiffies + 1);
 282         }
 283 }
 284
 285 static void aica_period_elapsed(struct timer_list *t)
 286 {
 287         struct snd_card_aica *dreamcastcard = from_timer(dreamcastcard,
 288                                                               t, timer);
 289         struct snd_pcm_substream *substream = dreamcastcard->substream;
 290         /*timer function - so cannot sleep */
 291         int play_period;
 292         struct snd_pcm_runtime *runtime;
 293         if (!snd_pcm_running(substream))
 294                 return;
 295         runtime = substream->runtime;
 296         dreamcastcard = substream->pcm->private_data;
 297         /* Have we played out an additional period? */
 298         play_period =
 299             frames_to_bytes(runtime,
 300                             readl
 301                             (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
 302             AICA_PERIOD_SIZE;
 303         if (play_period == dreamcastcard->current_period) {
 304                 /* reschedule the timer */
 305                 mod_timer(&(dreamcastcard->timer), jiffies + 1);
 306                 return;
 307         }
 308         if (runtime->channels > 1)
 309                 dreamcastcard->current_period = play_period;
 310         if (unlikely(dreamcastcard->dma_check == 0))
 311                 dreamcastcard->dma_check = 1;
 312         schedule_work(&(dreamcastcard->spu_dma_work));
 313 }
 314
 315 static void spu_begin_dma(struct snd_pcm_substream *substream)
 316 {
 317         struct snd_card_aica *dreamcastcard;
 318         struct snd_pcm_runtime *runtime;
 319         runtime = substream->runtime;
 320         dreamcastcard = substream->pcm->private_data;
 321         /*get the queue to do the work */
 322         schedule_work(&(dreamcastcard->spu_dma_work));
 323         mod_timer(&dreamcastcard->timer, jiffies + 4);
 324 }
 325
 326 static int snd_aicapcm_pcm_open(struct snd_pcm_substream
 327                                 *substream)
 328 {
 329         struct snd_pcm_runtime *runtime;
 330         struct aica_channel *channel;
 331         struct snd_card_aica *dreamcastcard;
 332         if (!enable)
 333                 return -ENOENT;
 334         dreamcastcard = substream->pcm->private_data;
 335         channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
 336         if (!channel)
 337                 return -ENOMEM;
 338         /* set defaults for channel */
 339         channel->sfmt = SM_8BIT;
 340         channel->cmd = AICA_CMD_START;
 341         channel->vol = dreamcastcard->master_volume;
 342         channel->pan = 0x80;
 343         channel->pos = 0;
 344         channel->flags = 0;     /* default to mono */
 345         dreamcastcard->channel = channel;
 346         runtime = substream->runtime;
 347         runtime->hw = snd_pcm_aica_playback_hw;
 348         spu_enable();
 349         dreamcastcard->clicks = 0;
 350         dreamcastcard->current_period = 0;
 351         dreamcastcard->dma_check = 0;
 352         return 0;
 353 }
 354
 355 static int snd_aicapcm_pcm_sync_stop(struct snd_pcm_substream *substream)
 356 {
 357         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 358
 359         del_timer_sync(&dreamcastcard->timer);
 360         cancel_work_sync(&dreamcastcard->spu_dma_work);
 361         return 0;
 362 }
 363
 364 static int snd_aicapcm_pcm_close(struct snd_pcm_substream
 365                                  *substream)
 366 {
 367         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 368         dreamcastcard->substream = NULL;
 369         kfree(dreamcastcard->channel);
 370         spu_disable();
 371         return 0;
 372 }
 373
 374 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
 375                                    *substream)
 376 {
 377         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 378         if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
 379                 dreamcastcard->channel->sfmt = SM_16BIT;
 380         dreamcastcard->channel->freq = substream->runtime->rate;
 381         dreamcastcard->substream = substream;
 382         return 0;
 383 }
 384
 385 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
 386                                    *substream, int cmd)
 387 {
 388         switch (cmd) {
 389         case SNDRV_PCM_TRIGGER_START:
 390                 spu_begin_dma(substream);
 391                 break;
 392         case SNDRV_PCM_TRIGGER_STOP:
 393                 aica_chn_halt();
 394                 break;
 395         default:
 396                 return -EINVAL;
 397         }
 398         return 0;
 399 }
 400
 401 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
 402                                              *substream)
 403 {
 404         return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
 405 }
 406
 407 static const struct snd_pcm_ops snd_aicapcm_playback_ops = {
 408         .open = snd_aicapcm_pcm_open,
 409         .close = snd_aicapcm_pcm_close,
 410         .prepare = snd_aicapcm_pcm_prepare,
 411         .trigger = snd_aicapcm_pcm_trigger,
 412         .pointer = snd_aicapcm_pcm_pointer,
 413         .sync_stop = snd_aicapcm_pcm_sync_stop,
 414 };
 415
 416 /* TO DO: set up to handle more than one pcm instance */
 417 static int __init snd_aicapcmchip(struct snd_card_aica
 418                                   *dreamcastcard, int pcm_index)
 419 {
 420         struct snd_pcm *pcm;
 421         int err;
 422         /* AICA has no capture ability */
 423         err =
 424             snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
 425                         &pcm);
 426         if (unlikely(err < 0))
 427                 return err;
 428         pcm->private_data = dreamcastcard;
 429         strcpy(pcm->name, "AICA PCM");
 430         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 431                         &snd_aicapcm_playback_ops);
 432         /* Allocate the DMA buffers */
 433         snd_pcm_set_managed_buffer_all(pcm,
 434                                        SNDRV_DMA_TYPE_CONTINUOUS,
 435                                        NULL,
 436                                        AICA_BUFFER_SIZE,
 437                                        AICA_BUFFER_SIZE);
 438         return 0;
 439 }
 440
 441 /* Mixer controls */
 442 #define aica_pcmswitch_info             snd_ctl_boolean_mono_info
 443
 444 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
 445                               struct snd_ctl_elem_value *ucontrol)
 446 {
 447         ucontrol->value.integer.value[0] = 1;   /* TO DO: Fix me */
 448         return 0;
 449 }
 450
 451 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
 452                               struct snd_ctl_elem_value *ucontrol)
 453 {
 454         if (ucontrol->value.integer.value[0] == 1)
 455                 return 0;       /* TO DO: Fix me */
 456         else
 457                 aica_chn_halt();
 458         return 0;
 459 }
 460
 461 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
 462                                struct snd_ctl_elem_info *uinfo)
 463 {
 464         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 465         uinfo->count = 1;
 466         uinfo->value.integer.min = 0;
 467         uinfo->value.integer.max = 0xFF;
 468         return 0;
 469 }
 470
 471 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
 472                               struct snd_ctl_elem_value *ucontrol)
 473 {
 474         struct snd_card_aica *dreamcastcard;
 475         dreamcastcard = kcontrol->private_data;
 476         if (unlikely(!dreamcastcard->channel))
 477                 return -ETXTBSY;        /* we've not yet been set up */
 478         ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
 479         return 0;
 480 }
 481
 482 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
 483                               struct snd_ctl_elem_value *ucontrol)
 484 {
 485         struct snd_card_aica *dreamcastcard;
 486         unsigned int vol;
 487         dreamcastcard = kcontrol->private_data;
 488         if (unlikely(!dreamcastcard->channel))
 489                 return -ETXTBSY;
 490         vol = ucontrol->value.integer.value[0];
 491         if (vol > 0xff)
 492                 return -EINVAL;
 493         if (unlikely(dreamcastcard->channel->vol == vol))
 494                 return 0;
 495         dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
 496         dreamcastcard->master_volume = ucontrol->value.integer.value[0];
 497         spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 498                     dreamcastcard->channel, sizeof(struct aica_channel));
 499         return 1;
 500 }
 501
 502 static const struct snd_kcontrol_new snd_aica_pcmswitch_control = {
 503         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 504         .name = "PCM Playback Switch",
 505         .index = 0,
 506         .info = aica_pcmswitch_info,
 507         .get = aica_pcmswitch_get,
 508         .put = aica_pcmswitch_put
 509 };
 510
 511 static const struct snd_kcontrol_new snd_aica_pcmvolume_control = {
 512         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 513         .name = "PCM Playback Volume",
 514         .index = 0,
 515         .info = aica_pcmvolume_info,
 516         .get = aica_pcmvolume_get,
 517         .put = aica_pcmvolume_put
 518 };
 519
 520 static int load_aica_firmware(void)
 521 {
 522         int err;
 523         const struct firmware *fw_entry;
 524         spu_reset();
 525         err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
 526         if (unlikely(err))
 527                 return err;
 528         /* write firmware into memory */
 529         spu_disable();
 530         spu_memload(0, fw_entry->data, fw_entry->size);
 531         spu_enable();
 532         release_firmware(fw_entry);
 533         return err;
 534 }
 535
 536 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard)
 537 {
 538         int err;
 539         err = snd_ctl_add
 540             (dreamcastcard->card,
 541              snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
 542         if (unlikely(err < 0))
 543                 return err;
 544         err = snd_ctl_add
 545             (dreamcastcard->card,
 546              snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
 547         if (unlikely(err < 0))
 548                 return err;
 549         return 0;
 550 }
 551
 552 static void snd_aica_remove(struct platform_device *devptr)
 553 {
 554         struct snd_card_aica *dreamcastcard;
 555         dreamcastcard = platform_get_drvdata(devptr);
 556         snd_card_free(dreamcastcard->card);
 557         kfree(dreamcastcard);
 558 }
 559
 560 static int snd_aica_probe(struct platform_device *devptr)
 561 {
 562         int err;
 563         struct snd_card_aica *dreamcastcard;
 564         dreamcastcard = kzalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
 565         if (unlikely(!dreamcastcard))
 566                 return -ENOMEM;
 567         err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER,
 568                            THIS_MODULE, 0, &dreamcastcard->card);
 569         if (unlikely(err < 0)) {
 570                 kfree(dreamcastcard);
 571                 return err;
 572         }
 573         strcpy(dreamcastcard->card->driver, "snd_aica");
 574         strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
 575         strcpy(dreamcastcard->card->longname,
 576                "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
 577         /* Prepare to use the queue */
 578         INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
 579         timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0);
 580         /* Load the PCM 'chip' */
 581         err = snd_aicapcmchip(dreamcastcard, 0);
 582         if (unlikely(err < 0))
 583                 goto freedreamcast;
 584         /* Add basic controls */
 585         err = add_aicamixer_controls(dreamcastcard);
 586         if (unlikely(err < 0))
 587                 goto freedreamcast;
 588         /* Register the card with ALSA subsystem */
 589         err = snd_card_register(dreamcastcard->card);
 590         if (unlikely(err < 0))
 591                 goto freedreamcast;
 592         platform_set_drvdata(devptr, dreamcastcard);
 593         dev_info(&devptr->dev,
 594                  "ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
 595         return 0;
 596       freedreamcast:
 597         snd_card_free(dreamcastcard->card);
 598         kfree(dreamcastcard);
 599         return err;
 600 }
 601
 602 static struct platform_driver snd_aica_driver = {
 603         .probe = snd_aica_probe,
 604         .remove_new = snd_aica_remove,
 605         .driver = {
 606                 .name = SND_AICA_DRIVER,
 607         },
 608 };
 609
 610 static int __init aica_init(void)
 611 {
 612         int err;
 613         err = platform_driver_register(&snd_aica_driver);
 614         if (unlikely(err < 0))
 615                 return err;
 616         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
 617                                              aica_memory_space, 2);
 618         if (IS_ERR(pd)) {
 619                 platform_driver_unregister(&snd_aica_driver);
 620                 return PTR_ERR(pd);
 621         }
 622         /* Load the firmware */
 623         return load_aica_firmware();
 624 }
 625
 626 static void __exit aica_exit(void)
 627 {
 628         platform_device_unregister(pd);
 629         platform_driver_unregister(&snd_aica_driver);
 630         /* Kill any sound still playing and reset ARM7 to safe state */
 631         spu_reset();
 632 }
 633
 634 module_init(aica_init);
 635 module_exit(aica_exit);