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/module.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 <linux/io.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/dma.h> 45 #include <mach/sysasic.h> 46 #include "aica.h" 47 48 MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); 49 MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver"); 50 MODULE_LICENSE("GPL"); 51 MODULE_SUPPORTED_DEVICE("{{Yamaha/SEGA, AICA}}"); 52 MODULE_FIRMWARE("aica_firmware.bin"); 53 54 /* module parameters */ 55 #define CARD_NAME "AICA" 56 static int index = -1; 57 static char *id; 58 static bool 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 /* Simple platform device */ 67 static struct platform_device *pd; 68 static struct resource aica_memory_space[2] = { 69 { 70 .name = "AICA ARM CONTROL", 71 .start = ARM_RESET_REGISTER, 72 .flags = IORESOURCE_MEM, 73 .end = ARM_RESET_REGISTER + 3, 74 }, 75 { 76 .name = "AICA Sound RAM", 77 .start = SPU_MEMORY_BASE, 78 .flags = IORESOURCE_MEM, 79 .end = SPU_MEMORY_BASE + 0x200000 - 1, 80 }, 81 }; 82 83 /* SPU specific functions */ 84 /* spu_write_wait - wait for G2-SH FIFO to clear */ 85 static void spu_write_wait(void) 86 { 87 int time_count; 88 time_count = 0; 89 while (1) { 90 if (!(readl(G2_FIFO) & 0x11)) 91 break; 92 /* To ensure hardware failure doesn't wedge kernel */ 93 time_count++; 94 if (time_count > 0x10000) { 95 snd_printk 96 ("WARNING: G2 FIFO appears to be blocked.\n"); 97 break; 98 } 99 } 100 } 101 102 /* spu_memset - write to memory in SPU address space */ 103 static void spu_memset(u32 toi, u32 what, int length) 104 { 105 int i; 106 unsigned long flags; 107 if (snd_BUG_ON(length % 4)) 108 return; 109 for (i = 0; i < length; i++) { 110 if (!(i % 8)) 111 spu_write_wait(); 112 local_irq_save(flags); 113 writel(what, toi + SPU_MEMORY_BASE); 114 local_irq_restore(flags); 115 toi++; 116 } 117 } 118 119 /* spu_memload - write to SPU address space */ 120 static void spu_memload(u32 toi, void *from, int length) 121 { 122 unsigned long flags; 123 u32 *froml = from; 124 u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi); 125 int i; 126 u32 val; 127 length = DIV_ROUND_UP(length, 4); 128 spu_write_wait(); 129 for (i = 0; i < length; i++) { 130 if (!(i % 8)) 131 spu_write_wait(); 132 val = *froml; 133 local_irq_save(flags); 134 writel(val, to); 135 local_irq_restore(flags); 136 froml++; 137 to++; 138 } 139 } 140 141 /* spu_disable - set spu registers to stop sound output */ 142 static void spu_disable(void) 143 { 144 int i; 145 unsigned long flags; 146 u32 regval; 147 spu_write_wait(); 148 regval = readl(ARM_RESET_REGISTER); 149 regval |= 1; 150 spu_write_wait(); 151 local_irq_save(flags); 152 writel(regval, ARM_RESET_REGISTER); 153 local_irq_restore(flags); 154 for (i = 0; i < 64; i++) { 155 spu_write_wait(); 156 regval = readl(SPU_REGISTER_BASE + (i * 0x80)); 157 regval = (regval & ~0x4000) | 0x8000; 158 spu_write_wait(); 159 local_irq_save(flags); 160 writel(regval, SPU_REGISTER_BASE + (i * 0x80)); 161 local_irq_restore(flags); 162 } 163 } 164 165 /* spu_enable - set spu registers to enable sound output */ 166 static void spu_enable(void) 167 { 168 unsigned long flags; 169 u32 regval = readl(ARM_RESET_REGISTER); 170 regval &= ~1; 171 spu_write_wait(); 172 local_irq_save(flags); 173 writel(regval, ARM_RESET_REGISTER); 174 local_irq_restore(flags); 175 } 176 177 /* 178 * Halt the sound processor, clear the memory, 179 * load some default ARM7 code, and then restart ARM7 180 */ 181 static void spu_reset(void) 182 { 183 unsigned long flags; 184 spu_disable(); 185 spu_memset(0, 0, 0x200000 / 4); 186 /* Put ARM7 in endless loop */ 187 local_irq_save(flags); 188 __raw_writel(0xea000002, SPU_MEMORY_BASE); 189 local_irq_restore(flags); 190 spu_enable(); 191 } 192 193 /* aica_chn_start - write to spu to start playback */ 194 static void aica_chn_start(void) 195 { 196 unsigned long flags; 197 spu_write_wait(); 198 local_irq_save(flags); 199 writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT); 200 local_irq_restore(flags); 201 } 202 203 /* aica_chn_halt - write to spu to halt playback */ 204 static void aica_chn_halt(void) 205 { 206 unsigned long flags; 207 spu_write_wait(); 208 local_irq_save(flags); 209 writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT); 210 local_irq_restore(flags); 211 } 212 213 /* ALSA code below */ 214 static const struct snd_pcm_hardware snd_pcm_aica_playback_hw = { 215 .info = (SNDRV_PCM_INFO_NONINTERLEAVED), 216 .formats = 217 (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | 218 SNDRV_PCM_FMTBIT_IMA_ADPCM), 219 .rates = SNDRV_PCM_RATE_8000_48000, 220 .rate_min = 8000, 221 .rate_max = 48000, 222 .channels_min = 1, 223 .channels_max = 2, 224 .buffer_bytes_max = AICA_BUFFER_SIZE, 225 .period_bytes_min = AICA_PERIOD_SIZE, 226 .period_bytes_max = AICA_PERIOD_SIZE, 227 .periods_min = AICA_PERIOD_NUMBER, 228 .periods_max = AICA_PERIOD_NUMBER, 229 }; 230 231 static int aica_dma_transfer(int channels, int buffer_size, 232 struct snd_pcm_substream *substream) 233 { 234 int q, err, period_offset; 235 struct snd_card_aica *dreamcastcard; 236 struct snd_pcm_runtime *runtime; 237 unsigned long flags; 238 err = 0; 239 dreamcastcard = substream->pcm->private_data; 240 period_offset = dreamcastcard->clicks; 241 period_offset %= (AICA_PERIOD_NUMBER / channels); 242 runtime = substream->runtime; 243 for (q = 0; q < channels; q++) { 244 local_irq_save(flags); 245 err = dma_xfer(AICA_DMA_CHANNEL, 246 (unsigned long) (runtime->dma_area + 247 (AICA_BUFFER_SIZE * q) / 248 channels + 249 AICA_PERIOD_SIZE * 250 period_offset), 251 AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET + 252 AICA_PERIOD_SIZE * period_offset, 253 buffer_size / channels, AICA_DMA_MODE); 254 if (unlikely(err < 0)) { 255 local_irq_restore(flags); 256 break; 257 } 258 dma_wait_for_completion(AICA_DMA_CHANNEL); 259 local_irq_restore(flags); 260 } 261 return err; 262 } 263 264 static void startup_aica(struct snd_card_aica *dreamcastcard) 265 { 266 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, 267 dreamcastcard->channel, sizeof(struct aica_channel)); 268 aica_chn_start(); 269 } 270 271 static void run_spu_dma(struct work_struct *work) 272 { 273 int buffer_size; 274 struct snd_pcm_runtime *runtime; 275 struct snd_card_aica *dreamcastcard; 276 dreamcastcard = 277 container_of(work, struct snd_card_aica, spu_dma_work); 278 runtime = dreamcastcard->substream->runtime; 279 if (unlikely(dreamcastcard->dma_check == 0)) { 280 buffer_size = 281 frames_to_bytes(runtime, runtime->buffer_size); 282 if (runtime->channels > 1) 283 dreamcastcard->channel->flags |= 0x01; 284 aica_dma_transfer(runtime->channels, buffer_size, 285 dreamcastcard->substream); 286 startup_aica(dreamcastcard); 287 dreamcastcard->clicks = 288 buffer_size / (AICA_PERIOD_SIZE * runtime->channels); 289 return; 290 } else { 291 aica_dma_transfer(runtime->channels, 292 AICA_PERIOD_SIZE * runtime->channels, 293 dreamcastcard->substream); 294 snd_pcm_period_elapsed(dreamcastcard->substream); 295 dreamcastcard->clicks++; 296 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER)) 297 dreamcastcard->clicks %= AICA_PERIOD_NUMBER; 298 mod_timer(&dreamcastcard->timer, jiffies + 1); 299 } 300 } 301 302 static void aica_period_elapsed(struct timer_list *t) 303 { 304 struct snd_card_aica *dreamcastcard = from_timer(dreamcastcard, 305 t, timer); 306 struct snd_pcm_substream *substream = dreamcastcard->timer_substream; 307 /*timer function - so cannot sleep */ 308 int play_period; 309 struct snd_pcm_runtime *runtime; 310 runtime = substream->runtime; 311 dreamcastcard = substream->pcm->private_data; 312 /* Have we played out an additional period? */ 313 play_period = 314 frames_to_bytes(runtime, 315 readl 316 (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) / 317 AICA_PERIOD_SIZE; 318 if (play_period == dreamcastcard->current_period) { 319 /* reschedule the timer */ 320 mod_timer(&(dreamcastcard->timer), jiffies + 1); 321 return; 322 } 323 if (runtime->channels > 1) 324 dreamcastcard->current_period = play_period; 325 if (unlikely(dreamcastcard->dma_check == 0)) 326 dreamcastcard->dma_check = 1; 327 schedule_work(&(dreamcastcard->spu_dma_work)); 328 } 329 330 static void spu_begin_dma(struct snd_pcm_substream *substream) 331 { 332 struct snd_card_aica *dreamcastcard; 333 struct snd_pcm_runtime *runtime; 334 runtime = substream->runtime; 335 dreamcastcard = substream->pcm->private_data; 336 /*get the queue to do the work */ 337 schedule_work(&(dreamcastcard->spu_dma_work)); 338 /* Timer may already be running */ 339 if (unlikely(dreamcastcard->timer_substream)) { 340 mod_timer(&dreamcastcard->timer, jiffies + 4); 341 return; 342 } 343 timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0); 344 dreamcastcard->timer_substream = substream; 345 mod_timer(&dreamcastcard->timer, jiffies + 4); 346 } 347 348 static int snd_aicapcm_pcm_open(struct snd_pcm_substream 349 *substream) 350 { 351 struct snd_pcm_runtime *runtime; 352 struct aica_channel *channel; 353 struct snd_card_aica *dreamcastcard; 354 if (!enable) 355 return -ENOENT; 356 dreamcastcard = substream->pcm->private_data; 357 channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL); 358 if (!channel) 359 return -ENOMEM; 360 /* set defaults for channel */ 361 channel->sfmt = SM_8BIT; 362 channel->cmd = AICA_CMD_START; 363 channel->vol = dreamcastcard->master_volume; 364 channel->pan = 0x80; 365 channel->pos = 0; 366 channel->flags = 0; /* default to mono */ 367 dreamcastcard->channel = channel; 368 runtime = substream->runtime; 369 runtime->hw = snd_pcm_aica_playback_hw; 370 spu_enable(); 371 dreamcastcard->clicks = 0; 372 dreamcastcard->current_period = 0; 373 dreamcastcard->dma_check = 0; 374 return 0; 375 } 376 377 static int snd_aicapcm_pcm_close(struct snd_pcm_substream 378 *substream) 379 { 380 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 381 flush_work(&(dreamcastcard->spu_dma_work)); 382 if (dreamcastcard->timer_substream) 383 del_timer(&dreamcastcard->timer); 384 kfree(dreamcastcard->channel); 385 spu_disable(); 386 return 0; 387 } 388 389 static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream 390 *substream) 391 { 392 /* Free the DMA buffer */ 393 return snd_pcm_lib_free_pages(substream); 394 } 395 396 static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream 397 *substream, struct snd_pcm_hw_params 398 *hw_params) 399 { 400 /* Allocate a DMA buffer using ALSA built-ins */ 401 return 402 snd_pcm_lib_malloc_pages(substream, 403 params_buffer_bytes(hw_params)); 404 } 405 406 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream 407 *substream) 408 { 409 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 410 if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE) 411 dreamcastcard->channel->sfmt = SM_16BIT; 412 dreamcastcard->channel->freq = substream->runtime->rate; 413 dreamcastcard->substream = substream; 414 return 0; 415 } 416 417 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream 418 *substream, int cmd) 419 { 420 switch (cmd) { 421 case SNDRV_PCM_TRIGGER_START: 422 spu_begin_dma(substream); 423 break; 424 case SNDRV_PCM_TRIGGER_STOP: 425 aica_chn_halt(); 426 break; 427 default: 428 return -EINVAL; 429 } 430 return 0; 431 } 432 433 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream 434 *substream) 435 { 436 return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER); 437 } 438 439 static const struct snd_pcm_ops snd_aicapcm_playback_ops = { 440 .open = snd_aicapcm_pcm_open, 441 .close = snd_aicapcm_pcm_close, 442 .ioctl = snd_pcm_lib_ioctl, 443 .hw_params = snd_aicapcm_pcm_hw_params, 444 .hw_free = snd_aicapcm_pcm_hw_free, 445 .prepare = snd_aicapcm_pcm_prepare, 446 .trigger = snd_aicapcm_pcm_trigger, 447 .pointer = snd_aicapcm_pcm_pointer, 448 }; 449 450 /* TO DO: set up to handle more than one pcm instance */ 451 static int __init snd_aicapcmchip(struct snd_card_aica 452 *dreamcastcard, int pcm_index) 453 { 454 struct snd_pcm *pcm; 455 int err; 456 /* AICA has no capture ability */ 457 err = 458 snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, 459 &pcm); 460 if (unlikely(err < 0)) 461 return err; 462 pcm->private_data = dreamcastcard; 463 strcpy(pcm->name, "AICA PCM"); 464 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 465 &snd_aicapcm_playback_ops); 466 /* Allocate the DMA buffers */ 467 err = 468 snd_pcm_lib_preallocate_pages_for_all(pcm, 469 SNDRV_DMA_TYPE_CONTINUOUS, 470 snd_dma_continuous_data 471 (GFP_KERNEL), 472 AICA_BUFFER_SIZE, 473 AICA_BUFFER_SIZE); 474 return err; 475 } 476 477 /* Mixer controls */ 478 #define aica_pcmswitch_info snd_ctl_boolean_mono_info 479 480 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol, 481 struct snd_ctl_elem_value *ucontrol) 482 { 483 ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */ 484 return 0; 485 } 486 487 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol, 488 struct snd_ctl_elem_value *ucontrol) 489 { 490 if (ucontrol->value.integer.value[0] == 1) 491 return 0; /* TO DO: Fix me */ 492 else 493 aica_chn_halt(); 494 return 0; 495 } 496 497 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol, 498 struct snd_ctl_elem_info *uinfo) 499 { 500 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 501 uinfo->count = 1; 502 uinfo->value.integer.min = 0; 503 uinfo->value.integer.max = 0xFF; 504 return 0; 505 } 506 507 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol, 508 struct snd_ctl_elem_value *ucontrol) 509 { 510 struct snd_card_aica *dreamcastcard; 511 dreamcastcard = kcontrol->private_data; 512 if (unlikely(!dreamcastcard->channel)) 513 return -ETXTBSY; /* we've not yet been set up */ 514 ucontrol->value.integer.value[0] = dreamcastcard->channel->vol; 515 return 0; 516 } 517 518 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol, 519 struct snd_ctl_elem_value *ucontrol) 520 { 521 struct snd_card_aica *dreamcastcard; 522 unsigned int vol; 523 dreamcastcard = kcontrol->private_data; 524 if (unlikely(!dreamcastcard->channel)) 525 return -ETXTBSY; 526 vol = ucontrol->value.integer.value[0]; 527 if (vol > 0xff) 528 return -EINVAL; 529 if (unlikely(dreamcastcard->channel->vol == vol)) 530 return 0; 531 dreamcastcard->channel->vol = ucontrol->value.integer.value[0]; 532 dreamcastcard->master_volume = ucontrol->value.integer.value[0]; 533 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, 534 dreamcastcard->channel, sizeof(struct aica_channel)); 535 return 1; 536 } 537 538 static const struct snd_kcontrol_new snd_aica_pcmswitch_control = { 539 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 540 .name = "PCM Playback Switch", 541 .index = 0, 542 .info = aica_pcmswitch_info, 543 .get = aica_pcmswitch_get, 544 .put = aica_pcmswitch_put 545 }; 546 547 static const struct snd_kcontrol_new snd_aica_pcmvolume_control = { 548 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 549 .name = "PCM Playback Volume", 550 .index = 0, 551 .info = aica_pcmvolume_info, 552 .get = aica_pcmvolume_get, 553 .put = aica_pcmvolume_put 554 }; 555 556 static int load_aica_firmware(void) 557 { 558 int err; 559 const struct firmware *fw_entry; 560 spu_reset(); 561 err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev); 562 if (unlikely(err)) 563 return err; 564 /* write firmware into memory */ 565 spu_disable(); 566 spu_memload(0, fw_entry->data, fw_entry->size); 567 spu_enable(); 568 release_firmware(fw_entry); 569 return err; 570 } 571 572 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard) 573 { 574 int err; 575 err = snd_ctl_add 576 (dreamcastcard->card, 577 snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard)); 578 if (unlikely(err < 0)) 579 return err; 580 err = snd_ctl_add 581 (dreamcastcard->card, 582 snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard)); 583 if (unlikely(err < 0)) 584 return err; 585 return 0; 586 } 587 588 static int snd_aica_remove(struct platform_device *devptr) 589 { 590 struct snd_card_aica *dreamcastcard; 591 dreamcastcard = platform_get_drvdata(devptr); 592 if (unlikely(!dreamcastcard)) 593 return -ENODEV; 594 snd_card_free(dreamcastcard->card); 595 kfree(dreamcastcard); 596 return 0; 597 } 598 599 static int snd_aica_probe(struct platform_device *devptr) 600 { 601 int err; 602 struct snd_card_aica *dreamcastcard; 603 dreamcastcard = kzalloc(sizeof(struct snd_card_aica), GFP_KERNEL); 604 if (unlikely(!dreamcastcard)) 605 return -ENOMEM; 606 err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER, 607 THIS_MODULE, 0, &dreamcastcard->card); 608 if (unlikely(err < 0)) { 609 kfree(dreamcastcard); 610 return err; 611 } 612 strcpy(dreamcastcard->card->driver, "snd_aica"); 613 strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER); 614 strcpy(dreamcastcard->card->longname, 615 "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast"); 616 /* Prepare to use the queue */ 617 INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma); 618 /* Load the PCM 'chip' */ 619 err = snd_aicapcmchip(dreamcastcard, 0); 620 if (unlikely(err < 0)) 621 goto freedreamcast; 622 /* Add basic controls */ 623 err = add_aicamixer_controls(dreamcastcard); 624 if (unlikely(err < 0)) 625 goto freedreamcast; 626 /* Register the card with ALSA subsystem */ 627 err = snd_card_register(dreamcastcard->card); 628 if (unlikely(err < 0)) 629 goto freedreamcast; 630 platform_set_drvdata(devptr, dreamcastcard); 631 snd_printk 632 ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n"); 633 return 0; 634 freedreamcast: 635 snd_card_free(dreamcastcard->card); 636 kfree(dreamcastcard); 637 return err; 638 } 639 640 static struct platform_driver snd_aica_driver = { 641 .probe = snd_aica_probe, 642 .remove = snd_aica_remove, 643 .driver = { 644 .name = SND_AICA_DRIVER, 645 }, 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 (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 platform_device_unregister(pd); 667 platform_driver_unregister(&snd_aica_driver); 668 /* Kill any sound still playing and reset ARM7 to safe state */ 669 spu_reset(); 670 } 671 672 module_init(aica_init); 673 module_exit(aica_exit); 674