sound/sh/aica.c

   1 /*
   2 * This code is licenced under
   3 * the General Public Licence
   4 * version 2
   5 *
   6 * Copyright Adrian McMenamin 2005, 2006, 2007
   7 * <adrian@mcmen.demon.co.uk>
   8 * Requires firmware (BSD licenced) available from:
   9 * http://linuxdc.cvs.sourceforge.net/linuxdc/linux-sh-dc/sound/oss/aica/firmware/
  10 * or the maintainer
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of version 2 of the GNU General Public License as published by
  14 * the Free Software Foundation.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24 *
  25 */
  26
  27 #include <linux/init.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/slab.h>
  30 #include <linux/time.h>
  31 #include <linux/wait.h>
  32 #include <linux/moduleparam.h>
  33 #include <linux/platform_device.h>
  34 #include <linux/firmware.h>
  35 #include <linux/timer.h>
  36 #include <linux/delay.h>
  37 #include <linux/workqueue.h>
  38 #include <sound/driver.h>
  39 #include <sound/core.h>
  40 #include <sound/control.h>
  41 #include <sound/pcm.h>
  42 #include <sound/initval.h>
  43 #include <sound/info.h>
  44 #include <asm/io.h>
  45 #include <asm/dma.h>
  46 #include <asm/dreamcast/sysasic.h>
  47 #include "aica.h"
  48
  49 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>");
  50 MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver");
  51 MODULE_LICENSE("GPL");
  52 MODULE_SUPPORTED_DEVICE("{{Yamaha/SEGA, AICA}}");
  53
  54 /* module parameters */
  55 #define CARD_NAME "AICA"
  56 static int index = -1;
  57 static char *id;
  58 static int enable = 1;
  59 module_param(index, int, 0444);
  60 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
  61 module_param(id, charp, 0444);
  62 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
  63 module_param(enable, bool, 0644);
  64 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
  65
  66 /* Use workqueue */
  67
  68 static struct spu_work_holder {
  69         struct work_struct spu_dma_work;
  70         void *sspointer;
  71 } spu_working;
  72
  73 static struct workqueue_struct *aica_queue;
  74
  75 /* Simple platform device */
  76 static struct platform_device *pd;
  77 static struct resource aica_memory_space[2] = {
  78         {
  79          .name = "AICA ARM CONTROL",
  80          .start = ARM_RESET_REGISTER,
  81          .flags = IORESOURCE_MEM,
  82          .end = ARM_RESET_REGISTER + 3,
  83          },
  84         {
  85          .name = "AICA Sound RAM",
  86          .start = SPU_MEMORY_BASE,
  87          .flags = IORESOURCE_MEM,
  88          .end = SPU_MEMORY_BASE + 0x200000 - 1,
  89          },
  90 };
  91
  92 /* SPU specific functions */
  93 /* spu_write_wait - wait for G2-SH FIFO to clear */
  94 static void spu_write_wait(void)
  95 {
  96         int time_count;
  97         time_count = 0;
  98         while (1) {
  99                 if (!(readl(G2_FIFO) & 0x11))
 100                         break;
 101                 /* To ensure hardware failure doesn't wedge kernel */
 102                 time_count++;
 103                 if (time_count > 0x10000)
 104                 {
 105                         snd_printk("WARNING: G2 FIFO appears to be blocked.\n");
 106                         break;
 107                 }
 108         }
 109 }
 110
 111 /* spu_memset - write to memory in SPU address space */
 112 static void spu_memset(u32 toi, u32 what, int length)
 113 {
 114         int i;
 115         snd_assert(length % 4 == 0, return);
 116         for (i = 0; i < length; i++) {
 117                 if (!(i % 8))
 118                         spu_write_wait();
 119                 writel(what, toi + SPU_MEMORY_BASE);
 120                 toi++;
 121         }
 122 }
 123
 124 /* spu_memload - write to SPU address space */
 125 static void spu_memload(u32 toi, void *from, int length)
 126 {
 127         u32 *froml = from;
 128         u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
 129         int i;
 130         u32 val;
 131         length = DIV_ROUND_UP(length, 4);
 132         spu_write_wait();
 133         for (i = 0; i < length; i++) {
 134                 if (!(i % 8))
 135                         spu_write_wait();
 136                 val = *froml;
 137                 writel(val, to);
 138                 froml++;
 139                 to++;
 140         }
 141 }
 142
 143 /* spu_disable - set spu registers to stop sound output */
 144 static void spu_disable(void)
 145 {
 146         int i;
 147         u32 regval;
 148         spu_write_wait();
 149         regval = readl(ARM_RESET_REGISTER);
 150         regval |= 1;
 151         spu_write_wait();
 152         writel(regval, ARM_RESET_REGISTER);
 153         for (i = 0; i < 64; i++) {
 154                 spu_write_wait();
 155                 regval = readl(SPU_REGISTER_BASE + (i * 0x80));
 156                 regval = (regval & ~0x4000) | 0x8000;
 157                 spu_write_wait();
 158                 writel(regval, SPU_REGISTER_BASE + (i * 0x80));
 159         }
 160 }
 161
 162 /* spu_enable - set spu registers to enable sound output */
 163 static void spu_enable(void)
 164 {
 165         u32 regval = readl(ARM_RESET_REGISTER);
 166         regval &= ~1;
 167         spu_write_wait();
 168         writel(regval, ARM_RESET_REGISTER);
 169 }
 170
 171 /*
 172  * Halt the sound processor, clear the memory,
 173  * load some default ARM7 code, and then restart ARM7
 174 */
 175 static void spu_reset(void)
 176 {
 177         spu_disable();
 178         spu_memset(0, 0, 0x200000 / 4);
 179         /* Put ARM7 in endless loop */
 180         ctrl_outl(0xea000002, SPU_MEMORY_BASE);
 181         spu_enable();
 182 }
 183
 184 /* aica_chn_start - write to spu to start playback */
 185 static void aica_chn_start(void)
 186 {
 187         spu_write_wait();
 188         writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
 189 }
 190
 191 /* aica_chn_halt - write to spu to halt playback */
 192 static void aica_chn_halt(void)
 193 {
 194         spu_write_wait();
 195         writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
 196 }
 197
 198 /* ALSA code below */
 199 static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
 200         .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
 201         .formats =
 202             (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
 203              SNDRV_PCM_FMTBIT_IMA_ADPCM),
 204         .rates = SNDRV_PCM_RATE_8000_48000,
 205         .rate_min = 8000,
 206         .rate_max = 48000,
 207         .channels_min = 1,
 208         .channels_max = 2,
 209         .buffer_bytes_max = AICA_BUFFER_SIZE,
 210         .period_bytes_min = AICA_PERIOD_SIZE,
 211         .period_bytes_max = AICA_PERIOD_SIZE,
 212         .periods_min = AICA_PERIOD_NUMBER,
 213         .periods_max = AICA_PERIOD_NUMBER,
 214 };
 215
 216 static int aica_dma_transfer(int channels, int buffer_size,
 217                              struct snd_pcm_substream *substream)
 218 {
 219         int q, err, period_offset;
 220         struct snd_card_aica *dreamcastcard;
 221         struct snd_pcm_runtime *runtime;
 222         err = 0;
 223         dreamcastcard = substream->pcm->private_data;
 224         period_offset = dreamcastcard->clicks;
 225         period_offset %= (AICA_PERIOD_NUMBER / channels);
 226         runtime = substream->runtime;
 227         for (q = 0; q < channels; q++) {
 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                         break;
 239                 dma_wait_for_completion(AICA_DMA_CHANNEL);
 240         }
 241         return err;
 242 }
 243
 244 static void startup_aica(struct snd_card_aica *dreamcastcard)
 245 {
 246         spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 247                     dreamcastcard->channel,
 248                     sizeof(struct aica_channel));
 249         aica_chn_start();
 250 }
 251
 252 static void run_spu_dma(struct work_struct *work)
 253 {
 254         int buffer_size;
 255         struct snd_pcm_substream *substream;
 256         struct snd_pcm_runtime *runtime;
 257         struct snd_card_aica *dreamcastcard;
 258         struct spu_work_holder *holder = container_of(work, struct spu_work_holder, spu_dma_work);
 259         substream = holder-> sspointer;
 260         dreamcastcard = substream->pcm->private_data;
 261         runtime = substream->runtime;
 262         if (unlikely(dreamcastcard->dma_check == 0)) {
 263                 buffer_size = 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, substream);
 267                 startup_aica(dreamcastcard);
 268                 dreamcastcard->clicks =
 269                     buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
 270                 return;
 271         } else {
 272                 aica_dma_transfer(runtime->channels,
 273                                   AICA_PERIOD_SIZE * runtime->channels,
 274                                   substream);
 275                 snd_pcm_period_elapsed(dreamcastcard->substream);
 276                 dreamcastcard->clicks++;
 277                 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
 278                 {
 279                         dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
 280                 }
 281                 mod_timer(&dreamcastcard->timer, jiffies + 1);
 282         }
 283 }
 284
 285 static void aica_period_elapsed(unsigned long timer_var)
 286 {
 287         /*timer function - so cannot sleep */
 288         int play_period;
 289         struct snd_pcm_runtime *runtime;
 290         struct snd_pcm_substream *substream;
 291         struct snd_card_aica *dreamcastcard;
 292         substream = (struct snd_pcm_substream *)timer_var;
 293         runtime = substream->runtime;
 294         dreamcastcard = substream->pcm->private_data;
 295         /* Have we played out an additional period? */
 296         play_period =
 297             frames_to_bytes(runtime,
 298                             readl
 299                             (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
 300             AICA_PERIOD_SIZE;
 301         if (play_period == dreamcastcard->current_period) {
 302                 /* reschedule the timer */
 303                 mod_timer(&(dreamcastcard->timer), jiffies + 1);
 304                 return;
 305         }
 306         if (runtime->channels > 1)
 307                 dreamcastcard->current_period = play_period;
 308         if (unlikely(dreamcastcard->dma_check == 0))
 309                 dreamcastcard->dma_check = 1;
 310                 queue_work(aica_queue, &(spu_working.spu_dma_work));
 311 }
 312
 313 static void spu_begin_dma(struct snd_pcm_substream *substream)
 314 {
 315         /* Must be atomic */
 316         struct snd_card_aica *dreamcastcard;
 317         struct snd_pcm_runtime *runtime;
 318         runtime = substream->runtime;
 319         dreamcastcard = substream->pcm->private_data;
 320         /*  Use queue to do the heavy lifting */
 321         spu_working.sspointer = substream;
 322         INIT_WORK(&(spu_working.spu_dma_work), run_spu_dma);
 323         queue_work(aica_queue, &(spu_working.spu_dma_work));
 324         /* Timer may already be running */
 325         if (unlikely(dreamcastcard->timer.data)) {
 326                 mod_timer(&dreamcastcard->timer, jiffies + 4);
 327                 return;
 328         }
 329         init_timer(&(dreamcastcard->timer));
 330         dreamcastcard->timer.data = (unsigned long)substream;
 331         dreamcastcard->timer.function = aica_period_elapsed;
 332         dreamcastcard->timer.expires = jiffies + 4;
 333         add_timer(&(dreamcastcard->timer));
 334 }
 335
 336 static int snd_aicapcm_pcm_open(struct snd_pcm_substream
 337                                 *substream)
 338 {
 339         struct snd_pcm_runtime *runtime;
 340         struct aica_channel *channel;
 341         struct snd_card_aica *dreamcastcard;
 342         if (!enable)
 343                 return -ENOENT;
 344         dreamcastcard = substream->pcm->private_data;
 345         channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
 346         if (!channel)
 347                 return -ENOMEM;
 348         /* set defaults for channel */
 349         channel->sfmt = SM_8BIT;
 350         channel->cmd = AICA_CMD_START;
 351         channel->vol = dreamcastcard->master_volume;
 352         channel->pan = 0x80;
 353         channel->pos = 0;
 354         channel->flags = 0;     /* default to mono */
 355         dreamcastcard->channel = channel;
 356         runtime = substream->runtime;
 357         runtime->hw = snd_pcm_aica_playback_hw;
 358         spu_enable();
 359         dreamcastcard->clicks = 0;
 360         dreamcastcard->current_period = 0;
 361         dreamcastcard->dma_check = 0;
 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         del_timer(&dreamcastcard->timer);
 370         kfree(dreamcastcard->channel);
 371         spu_disable();
 372         return 0;
 373 }
 374
 375 static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream
 376                                    *substream)
 377 {
 378         /* Free the DMA buffer */
 379         return snd_pcm_lib_free_pages(substream);
 380 }
 381
 382 static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
 383                                      *substream, struct snd_pcm_hw_params
 384                                      *hw_params)
 385 {
 386         /* Allocate a DMA buffer using ALSA built-ins */
 387         return
 388             snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 389 }
 390
 391 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
 392                                    *substream)
 393 {
 394         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
 395         if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
 396                 dreamcastcard->channel->sfmt = SM_16BIT;
 397         dreamcastcard->channel->freq = substream->runtime->rate;
 398         dreamcastcard->substream = substream;
 399         return 0;
 400 }
 401
 402 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
 403                                    *substream, int cmd)
 404 {
 405         struct snd_card_aica *dreamcastcard;
 406         switch (cmd) {
 407         case SNDRV_PCM_TRIGGER_START:
 408                 spu_begin_dma(substream);
 409                 break;
 410         case SNDRV_PCM_TRIGGER_STOP:
 411                 dreamcastcard = substream->pcm->private_data;
 412                 if (dreamcastcard->timer.data)
 413                         del_timer(&dreamcastcard->timer);
 414                 aica_chn_halt();
 415                 break;
 416         default:
 417                 return -EINVAL;
 418         }
 419         return 0;
 420 }
 421
 422 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
 423                                              *substream)
 424 {
 425         return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
 426 }
 427
 428 static struct snd_pcm_ops snd_aicapcm_playback_ops = {
 429         .open = snd_aicapcm_pcm_open,
 430         .close = snd_aicapcm_pcm_close,
 431         .ioctl = snd_pcm_lib_ioctl,
 432         .hw_params = snd_aicapcm_pcm_hw_params,
 433         .hw_free = snd_aicapcm_pcm_hw_free,
 434         .prepare = snd_aicapcm_pcm_prepare,
 435         .trigger = snd_aicapcm_pcm_trigger,
 436         .pointer = snd_aicapcm_pcm_pointer,
 437 };
 438
 439 /* TO DO: set up to handle more than one pcm instance */
 440 static int __init snd_aicapcmchip(struct snd_card_aica
 441                                   *dreamcastcard, int pcm_index)
 442 {
 443         struct snd_pcm *pcm;
 444         int err;
 445         /* AICA has no capture ability */
 446         err =
 447             snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, &pcm);
 448         if (unlikely(err < 0))
 449                 return err;
 450         pcm->private_data = dreamcastcard;
 451         strcpy(pcm->name, "AICA PCM");
 452         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 453                         &snd_aicapcm_playback_ops);
 454         /* Allocate the DMA buffers */
 455         err =
 456             snd_pcm_lib_preallocate_pages_for_all(pcm,
 457                                                   SNDRV_DMA_TYPE_CONTINUOUS,
 458                                                   snd_dma_continuous_data
 459                                                   (GFP_KERNEL),
 460                                                   AICA_BUFFER_SIZE,
 461                                                   AICA_BUFFER_SIZE);
 462         return err;
 463 }
 464
 465 /* Mixer controls */
 466 static int aica_pcmswitch_info(struct snd_kcontrol *kcontrol,
 467                                struct snd_ctl_elem_info *uinfo)
 468 {
 469         uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
 470         uinfo->count = 1;
 471         uinfo->value.integer.min = 0;
 472         uinfo->value.integer.max = 1;
 473         return 0;
 474 }
 475
 476 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
 477                               struct snd_ctl_elem_value *ucontrol)
 478 {
 479         ucontrol->value.integer.value[0] = 1;   /* TO DO: Fix me */
 480         return 0;
 481 }
 482
 483 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
 484                               struct snd_ctl_elem_value *ucontrol)
 485 {
 486         if (ucontrol->value.integer.value[0] == 1)
 487                 return 0;       /* TO DO: Fix me */
 488         else
 489                 aica_chn_halt();
 490         return 0;
 491 }
 492
 493 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
 494                                struct snd_ctl_elem_info *uinfo)
 495 {
 496         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 497         uinfo->count = 1;
 498         uinfo->value.integer.min = 0;
 499         uinfo->value.integer.max = 0xFF;
 500         return 0;
 501 }
 502
 503 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
 504                               struct snd_ctl_elem_value *ucontrol)
 505 {
 506         struct snd_card_aica *dreamcastcard;
 507         dreamcastcard = kcontrol->private_data;
 508         if (unlikely(!dreamcastcard->channel))
 509                 return -ETXTBSY;        /* we've not yet been set up */
 510         ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
 511         return 0;
 512 }
 513
 514 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
 515                               struct snd_ctl_elem_value *ucontrol)
 516 {
 517         struct snd_card_aica *dreamcastcard;
 518         dreamcastcard = kcontrol->private_data;
 519         if (unlikely(!dreamcastcard->channel))
 520                 return -ETXTBSY;
 521         if (unlikely(dreamcastcard->channel->vol ==
 522                      ucontrol->value.integer.value[0]))
 523                 return 0;
 524         dreamcastcard->channel->vol = ucontrol->value.integer.value[0];
 525         dreamcastcard->master_volume = ucontrol->value.integer.value[0];
 526         spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
 527                     dreamcastcard->channel,
 528                     sizeof(struct aica_channel));
 529
 530         return 1;
 531 }
 532
 533 static struct snd_kcontrol_new snd_aica_pcmswitch_control __devinitdata = {
 534         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 535         .name = "PCM Playback Switch",
 536         .index = 0,
 537         .info = aica_pcmswitch_info,
 538         .get = aica_pcmswitch_get,
 539         .put = aica_pcmswitch_put
 540 };
 541
 542 static struct snd_kcontrol_new snd_aica_pcmvolume_control __devinitdata = {
 543         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 544         .name = "PCM Playback Volume",
 545         .index = 0,
 546         .info = aica_pcmvolume_info,
 547         .get = aica_pcmvolume_get,
 548         .put = aica_pcmvolume_put
 549 };
 550
 551 static int load_aica_firmware(void)
 552 {
 553         int err;
 554         const struct firmware *fw_entry;
 555         spu_reset();
 556         err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
 557         if (unlikely(err))
 558                 return err;
 559         /* write firware into memory */
 560         spu_disable();
 561         spu_memload(0, fw_entry->data, fw_entry->size);
 562         spu_enable();
 563         release_firmware(fw_entry);
 564         return err;
 565 }
 566
 567 static int __devinit add_aicamixer_controls(struct snd_card_aica
 568                                             *dreamcastcard)
 569 {
 570         int err;
 571         err = snd_ctl_add
 572             (dreamcastcard->card,
 573              snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
 574         if (unlikely(err < 0))
 575                 return err;
 576         err = snd_ctl_add
 577             (dreamcastcard->card,
 578              snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
 579         if (unlikely(err < 0))
 580                 return err;
 581         return 0;
 582 }
 583
 584 static int snd_aica_remove(struct platform_device *devptr)
 585 {
 586         struct snd_card_aica *dreamcastcard;
 587         dreamcastcard = platform_get_drvdata(devptr);
 588         if (unlikely(!dreamcastcard))
 589                 return -ENODEV;
 590         snd_card_free(dreamcastcard->card);
 591         kfree(dreamcastcard);
 592         platform_set_drvdata(devptr, NULL);
 593         return 0;
 594 }
 595
 596 static int __init snd_aica_probe(struct platform_device *devptr)
 597 {
 598         int err;
 599         struct snd_card_aica *dreamcastcard;
 600         dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
 601         if (unlikely(!dreamcastcard))
 602                 return -ENOMEM;
 603         dreamcastcard->card =
 604             snd_card_new(index, SND_AICA_DRIVER, THIS_MODULE, 0);
 605         if (unlikely(!dreamcastcard->card)) {
 606                 kfree(dreamcastcard);
 607                 return -ENODEV;
 608         }
 609         strcpy(dreamcastcard->card->driver, "snd_aica");
 610         strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
 611         strcpy(dreamcastcard->card->longname,
 612                "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
 613         /* Load the PCM 'chip' */
 614         err = snd_aicapcmchip(dreamcastcard, 0);
 615         if (unlikely(err < 0))
 616                 goto freedreamcast;
 617         snd_card_set_dev(dreamcastcard->card, &devptr->dev);
 618         dreamcastcard->timer.data = 0;
 619         dreamcastcard->channel = NULL;
 620         /* Add basic controls */
 621         err = add_aicamixer_controls(dreamcastcard);
 622         if (unlikely(err < 0))
 623                 goto freedreamcast;
 624         /* Register the card with ALSA subsystem */
 625         err = snd_card_register(dreamcastcard->card);
 626         if (unlikely(err < 0))
 627                 goto freedreamcast;
 628         platform_set_drvdata(devptr, dreamcastcard);
 629         aica_queue = create_workqueue(CARD_NAME);
 630         if (unlikely(!aica_queue))
 631                 goto freedreamcast;
 632         snd_printk
 633             ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
 634         return 0;
 635       freedreamcast:
 636         snd_card_free(dreamcastcard->card);
 637         kfree(dreamcastcard);
 638         return err;
 639 }
 640
 641 static struct platform_driver snd_aica_driver = {
 642         .probe = snd_aica_probe,
 643         .remove = snd_aica_remove,
 644         .driver = {
 645                    .name = SND_AICA_DRIVER},
 646 };
 647
 648 static int __init aica_init(void)
 649 {
 650         int err;
 651         err = platform_driver_register(&snd_aica_driver);
 652         if (unlikely(err < 0))
 653                 return err;
 654         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
 655                                              aica_memory_space, 2);
 656         if (unlikely(IS_ERR(pd))) {
 657                 platform_driver_unregister(&snd_aica_driver);
 658                 return PTR_ERR(pd);
 659         }
 660         /* Load the firmware */
 661         return load_aica_firmware();
 662 }
 663
 664 static void __exit aica_exit(void)
 665 {
 666         /* Destroy the aica kernel thread */
 667         destroy_workqueue(aica_queue);
 668         platform_device_unregister(pd);
 669         platform_driver_unregister(&snd_aica_driver);
 670         /* Kill any sound still playing and reset ARM7 to safe state */
 671         spu_reset();
 672 }
 673
 674 module_init(aica_init);
 675 module_exit(aica_exit);