sound/sh/aica.c

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