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/core.h> 39#include <sound/control.h> 40#include <sound/pcm.h> 41#include <sound/initval.h> 42#include <sound/info.h> 43#include <asm/io.h> 44#include <asm/dma.h> 45#include <mach/sysasic.h> 46#include "aica.h" 47 48MODULE_AUTHOR("Adrian McMenamin <adrian@mcmen.demon.co.uk>"); 49MODULE_DESCRIPTION("Dreamcast AICA sound (pcm) driver"); 50MODULE_LICENSE("GPL"); 51MODULE_SUPPORTED_DEVICE("{{Yamaha/SEGA, AICA}}"); 52MODULE_FIRMWARE("aica_firmware.bin"); 53 54/* module parameters */ 55#define CARD_NAME "AICA" 56static int index = -1; 57static char *id; 58static int enable = 1; 59module_param(index, int, 0444); 60MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); 61module_param(id, charp, 0444); 62MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); 63module_param(enable, bool, 0644); 64MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); 65 66/* Use workqueue */ 67static struct workqueue_struct *aica_queue; 68 69/* Simple platform device */ 70static struct platform_device *pd; 71static struct resource aica_memory_space[2] = { 72 { 73 .name = "AICA ARM CONTROL", 74 .start = ARM_RESET_REGISTER, 75 .flags = IORESOURCE_MEM, 76 .end = ARM_RESET_REGISTER + 3, 77 }, 78 { 79 .name = "AICA Sound RAM", 80 .start = SPU_MEMORY_BASE, 81 .flags = IORESOURCE_MEM, 82 .end = SPU_MEMORY_BASE + 0x200000 - 1, 83 }, 84}; 85 86/* SPU specific functions */ 87/* spu_write_wait - wait for G2-SH FIFO to clear */ 88static void spu_write_wait(void) 89{ 90 int time_count; 91 time_count = 0; 92 while (1) { 93 if (!(readl(G2_FIFO) & 0x11)) 94 break; 95 /* To ensure hardware failure doesn't wedge kernel */ 96 time_count++; 97 if (time_count > 0x10000) { 98 snd_printk 99 ("WARNING: G2 FIFO appears to be blocked.\n"); 100 break; 101 } 102 } 103} 104 105/* spu_memset - write to memory in SPU address space */ 106static void spu_memset(u32 toi, u32 what, int length) 107{ 108 int i; 109 unsigned long flags; 110 if (snd_BUG_ON(length % 4)) 111 return; 112 for (i = 0; i < length; i++) { 113 if (!(i % 8)) 114 spu_write_wait(); 115 local_irq_save(flags); 116 writel(what, toi + SPU_MEMORY_BASE); 117 local_irq_restore(flags); 118 toi++; 119 } 120} 121 122/* spu_memload - write to SPU address space */ 123static void spu_memload(u32 toi, void *from, int length) 124{ 125 unsigned long flags; 126 u32 *froml = from; 127 u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi); 128 int i; 129 u32 val; 130 length = DIV_ROUND_UP(length, 4); 131 spu_write_wait(); 132 for (i = 0; i < length; i++) { 133 if (!(i % 8)) 134 spu_write_wait(); 135 val = *froml; 136 local_irq_save(flags); 137 writel(val, to); 138 local_irq_restore(flags); 139 froml++; 140 to++; 141 } 142} 143 144/* spu_disable - set spu registers to stop sound output */ 145static void spu_disable(void) 146{ 147 int i; 148 unsigned long flags; 149 u32 regval; 150 spu_write_wait(); 151 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 for (i = 0; i < 64; i++) { 158 spu_write_wait(); 159 regval = readl(SPU_REGISTER_BASE + (i * 0x80)); 160 regval = (regval & ~0x4000) | 0x8000; 161 spu_write_wait(); 162 local_irq_save(flags); 163 writel(regval, SPU_REGISTER_BASE + (i * 0x80)); 164 local_irq_restore(flags); 165 } 166} 167 168/* spu_enable - set spu registers to enable sound output */ 169static void spu_enable(void) 170{ 171 unsigned long flags; 172 u32 regval = readl(ARM_RESET_REGISTER); 173 regval &= ~1; 174 spu_write_wait(); 175 local_irq_save(flags); 176 writel(regval, ARM_RESET_REGISTER); 177 local_irq_restore(flags); 178} 179 180/* 181 * Halt the sound processor, clear the memory, 182 * load some default ARM7 code, and then restart ARM7 183*/ 184static void spu_reset(void) 185{ 186 unsigned long flags; 187 spu_disable(); 188 spu_memset(0, 0, 0x200000 / 4); 189 /* Put ARM7 in endless loop */ 190 local_irq_save(flags); 191 ctrl_outl(0xea000002, SPU_MEMORY_BASE); 192 local_irq_restore(flags); 193 spu_enable(); 194} 195 196/* aica_chn_start - write to spu to start playback */ 197static void aica_chn_start(void) 198{ 199 unsigned long flags; 200 spu_write_wait(); 201 local_irq_save(flags); 202 writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT); 203 local_irq_restore(flags); 204} 205 206/* aica_chn_halt - write to spu to halt playback */ 207static void aica_chn_halt(void) 208{ 209 unsigned long flags; 210 spu_write_wait(); 211 local_irq_save(flags); 212 writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT); 213 local_irq_restore(flags); 214} 215 216/* ALSA code below */ 217static struct snd_pcm_hardware snd_pcm_aica_playback_hw = { 218 .info = (SNDRV_PCM_INFO_NONINTERLEAVED), 219 .formats = 220 (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | 221 SNDRV_PCM_FMTBIT_IMA_ADPCM), 222 .rates = SNDRV_PCM_RATE_8000_48000, 223 .rate_min = 8000, 224 .rate_max = 48000, 225 .channels_min = 1, 226 .channels_max = 2, 227 .buffer_bytes_max = AICA_BUFFER_SIZE, 228 .period_bytes_min = AICA_PERIOD_SIZE, 229 .period_bytes_max = AICA_PERIOD_SIZE, 230 .periods_min = AICA_PERIOD_NUMBER, 231 .periods_max = AICA_PERIOD_NUMBER, 232}; 233 234static int aica_dma_transfer(int channels, int buffer_size, 235 struct snd_pcm_substream *substream) 236{ 237 int q, err, period_offset; 238 struct snd_card_aica *dreamcastcard; 239 struct snd_pcm_runtime *runtime; 240 unsigned long flags; 241 err = 0; 242 dreamcastcard = substream->pcm->private_data; 243 period_offset = dreamcastcard->clicks; 244 period_offset %= (AICA_PERIOD_NUMBER / channels); 245 runtime = substream->runtime; 246 for (q = 0; q < channels; q++) { 247 local_irq_save(flags); 248 err = dma_xfer(AICA_DMA_CHANNEL, 249 (unsigned long) (runtime->dma_area + 250 (AICA_BUFFER_SIZE * q) / 251 channels + 252 AICA_PERIOD_SIZE * 253 period_offset), 254 AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET + 255 AICA_PERIOD_SIZE * period_offset, 256 buffer_size / channels, AICA_DMA_MODE); 257 if (unlikely(err < 0)) { 258 local_irq_restore(flags); 259 break; 260 } 261 dma_wait_for_completion(AICA_DMA_CHANNEL); 262 local_irq_restore(flags); 263 } 264 return err; 265} 266 267static void startup_aica(struct snd_card_aica *dreamcastcard) 268{ 269 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, 270 dreamcastcard->channel, sizeof(struct aica_channel)); 271 aica_chn_start(); 272} 273 274static void run_spu_dma(struct work_struct *work) 275{ 276 int buffer_size; 277 struct snd_pcm_runtime *runtime; 278 struct snd_card_aica *dreamcastcard; 279 dreamcastcard = 280 container_of(work, struct snd_card_aica, spu_dma_work); 281 runtime = dreamcastcard->substream->runtime; 282 if (unlikely(dreamcastcard->dma_check == 0)) { 283 buffer_size = 284 frames_to_bytes(runtime, runtime->buffer_size); 285 if (runtime->channels > 1) 286 dreamcastcard->channel->flags |= 0x01; 287 aica_dma_transfer(runtime->channels, buffer_size, 288 dreamcastcard->substream); 289 startup_aica(dreamcastcard); 290 dreamcastcard->clicks = 291 buffer_size / (AICA_PERIOD_SIZE * runtime->channels); 292 return; 293 } else { 294 aica_dma_transfer(runtime->channels, 295 AICA_PERIOD_SIZE * runtime->channels, 296 dreamcastcard->substream); 297 snd_pcm_period_elapsed(dreamcastcard->substream); 298 dreamcastcard->clicks++; 299 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER)) 300 dreamcastcard->clicks %= AICA_PERIOD_NUMBER; 301 mod_timer(&dreamcastcard->timer, jiffies + 1); 302 } 303} 304 305static void aica_period_elapsed(unsigned long timer_var) 306{ 307 /*timer function - so cannot sleep */ 308 int play_period; 309 struct snd_pcm_runtime *runtime; 310 struct snd_pcm_substream *substream; 311 struct snd_card_aica *dreamcastcard; 312 substream = (struct snd_pcm_substream *) timer_var; 313 runtime = substream->runtime; 314 dreamcastcard = substream->pcm->private_data; 315 /* Have we played out an additional period? */ 316 play_period = 317 frames_to_bytes(runtime, 318 readl 319 (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) / 320 AICA_PERIOD_SIZE; 321 if (play_period == dreamcastcard->current_period) { 322 /* reschedule the timer */ 323 mod_timer(&(dreamcastcard->timer), jiffies + 1); 324 return; 325 } 326 if (runtime->channels > 1) 327 dreamcastcard->current_period = play_period; 328 if (unlikely(dreamcastcard->dma_check == 0)) 329 dreamcastcard->dma_check = 1; 330 queue_work(aica_queue, &(dreamcastcard->spu_dma_work)); 331} 332 333static void spu_begin_dma(struct snd_pcm_substream *substream) 334{ 335 struct snd_card_aica *dreamcastcard; 336 struct snd_pcm_runtime *runtime; 337 runtime = substream->runtime; 338 dreamcastcard = substream->pcm->private_data; 339 /*get the queue to do the work */ 340 queue_work(aica_queue, &(dreamcastcard->spu_dma_work)); 341 /* Timer may already be running */ 342 if (unlikely(dreamcastcard->timer.data)) { 343 mod_timer(&dreamcastcard->timer, jiffies + 4); 344 return; 345 } 346 init_timer(&(dreamcastcard->timer)); 347 dreamcastcard->timer.data = (unsigned long) substream; 348 dreamcastcard->timer.function = aica_period_elapsed; 349 dreamcastcard->timer.expires = jiffies + 4; 350 add_timer(&(dreamcastcard->timer)); 351} 352 353static int snd_aicapcm_pcm_open(struct snd_pcm_substream 354 *substream) 355{ 356 struct snd_pcm_runtime *runtime; 357 struct aica_channel *channel; 358 struct snd_card_aica *dreamcastcard; 359 if (!enable) 360 return -ENOENT; 361 dreamcastcard = substream->pcm->private_data; 362 channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL); 363 if (!channel) 364 return -ENOMEM; 365 /* set defaults for channel */ 366 channel->sfmt = SM_8BIT; 367 channel->cmd = AICA_CMD_START; 368 channel->vol = dreamcastcard->master_volume; 369 channel->pan = 0x80; 370 channel->pos = 0; 371 channel->flags = 0; /* default to mono */ 372 dreamcastcard->channel = channel; 373 runtime = substream->runtime; 374 runtime->hw = snd_pcm_aica_playback_hw; 375 spu_enable(); 376 dreamcastcard->clicks = 0; 377 dreamcastcard->current_period = 0; 378 dreamcastcard->dma_check = 0; 379 return 0; 380} 381 382static int snd_aicapcm_pcm_close(struct snd_pcm_substream 383 *substream) 384{ 385 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 386 flush_workqueue(aica_queue); 387 if (dreamcastcard->timer.data) 388 del_timer(&dreamcastcard->timer); 389 kfree(dreamcastcard->channel); 390 spu_disable(); 391 return 0; 392} 393 394static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream 395 *substream) 396{ 397 /* Free the DMA buffer */ 398 return snd_pcm_lib_free_pages(substream); 399} 400 401static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream 402 *substream, struct snd_pcm_hw_params 403 *hw_params) 404{ 405 /* Allocate a DMA buffer using ALSA built-ins */ 406 return 407 snd_pcm_lib_malloc_pages(substream, 408 params_buffer_bytes(hw_params)); 409} 410 411static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream 412 *substream) 413{ 414 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 415 if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE) 416 dreamcastcard->channel->sfmt = SM_16BIT; 417 dreamcastcard->channel->freq = substream->runtime->rate; 418 dreamcastcard->substream = substream; 419 return 0; 420} 421 422static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream 423 *substream, int cmd) 424{ 425 switch (cmd) { 426 case SNDRV_PCM_TRIGGER_START: 427 spu_begin_dma(substream); 428 break; 429 case SNDRV_PCM_TRIGGER_STOP: 430 aica_chn_halt(); 431 break; 432 default: 433 return -EINVAL; 434 } 435 return 0; 436} 437 438static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream 439 *substream) 440{ 441 return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER); 442} 443 444static struct snd_pcm_ops snd_aicapcm_playback_ops = { 445 .open = snd_aicapcm_pcm_open, 446 .close = snd_aicapcm_pcm_close, 447 .ioctl = snd_pcm_lib_ioctl, 448 .hw_params = snd_aicapcm_pcm_hw_params, 449 .hw_free = snd_aicapcm_pcm_hw_free, 450 .prepare = snd_aicapcm_pcm_prepare, 451 .trigger = snd_aicapcm_pcm_trigger, 452 .pointer = snd_aicapcm_pcm_pointer, 453}; 454 455/* TO DO: set up to handle more than one pcm instance */ 456static int __init snd_aicapcmchip(struct snd_card_aica 457 *dreamcastcard, int pcm_index) 458{ 459 struct snd_pcm *pcm; 460 int err; 461 /* AICA has no capture ability */ 462 err = 463 snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, 464 &pcm); 465 if (unlikely(err < 0)) 466 return err; 467 pcm->private_data = dreamcastcard; 468 strcpy(pcm->name, "AICA PCM"); 469 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 470 &snd_aicapcm_playback_ops); 471 /* Allocate the DMA buffers */ 472 err = 473 snd_pcm_lib_preallocate_pages_for_all(pcm, 474 SNDRV_DMA_TYPE_CONTINUOUS, 475 snd_dma_continuous_data 476 (GFP_KERNEL), 477 AICA_BUFFER_SIZE, 478 AICA_BUFFER_SIZE); 479 return err; 480} 481 482/* Mixer controls */ 483#define aica_pcmswitch_info snd_ctl_boolean_mono_info 484 485static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol, 486 struct snd_ctl_elem_value *ucontrol) 487{ 488 ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */ 489 return 0; 490} 491 492static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol, 493 struct snd_ctl_elem_value *ucontrol) 494{ 495 if (ucontrol->value.integer.value[0] == 1) 496 return 0; /* TO DO: Fix me */ 497 else 498 aica_chn_halt(); 499 return 0; 500} 501 502static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol, 503 struct snd_ctl_elem_info *uinfo) 504{ 505 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 506 uinfo->count = 1; 507 uinfo->value.integer.min = 0; 508 uinfo->value.integer.max = 0xFF; 509 return 0; 510} 511 512static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol, 513 struct snd_ctl_elem_value *ucontrol) 514{ 515 struct snd_card_aica *dreamcastcard; 516 dreamcastcard = kcontrol->private_data; 517 if (unlikely(!dreamcastcard->channel)) 518 return -ETXTBSY; /* we've not yet been set up */ 519 ucontrol->value.integer.value[0] = dreamcastcard->channel->vol; 520 return 0; 521} 522 523static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol, 524 struct snd_ctl_elem_value *ucontrol) 525{ 526 struct snd_card_aica *dreamcastcard; 527 unsigned int vol; 528 dreamcastcard = kcontrol->private_data; 529 if (unlikely(!dreamcastcard->channel)) 530 return -ETXTBSY; 531 vol = ucontrol->value.integer.value[0]; 532 if (vol > 0xff) 533 return -EINVAL; 534 if (unlikely(dreamcastcard->channel->vol == vol)) 535 return 0; 536 dreamcastcard->channel->vol = ucontrol->value.integer.value[0]; 537 dreamcastcard->master_volume = ucontrol->value.integer.value[0]; 538 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, 539 dreamcastcard->channel, sizeof(struct aica_channel)); 540 return 1; 541} 542 543static struct snd_kcontrol_new snd_aica_pcmswitch_control __devinitdata = { 544 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 545 .name = "PCM Playback Switch", 546 .index = 0, 547 .info = aica_pcmswitch_info, 548 .get = aica_pcmswitch_get, 549 .put = aica_pcmswitch_put 550}; 551 552static struct snd_kcontrol_new snd_aica_pcmvolume_control __devinitdata = { 553 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 554 .name = "PCM Playback Volume", 555 .index = 0, 556 .info = aica_pcmvolume_info, 557 .get = aica_pcmvolume_get, 558 .put = aica_pcmvolume_put 559}; 560 561static int load_aica_firmware(void) 562{ 563 int err; 564 const struct firmware *fw_entry; 565 spu_reset(); 566 err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev); 567 if (unlikely(err)) 568 return err; 569 /* write firmware into memory */ 570 spu_disable(); 571 spu_memload(0, fw_entry->data, fw_entry->size); 572 spu_enable(); 573 release_firmware(fw_entry); 574 return err; 575} 576 577static int __devinit add_aicamixer_controls(struct snd_card_aica 578 *dreamcastcard) 579{ 580 int err; 581 err = snd_ctl_add 582 (dreamcastcard->card, 583 snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard)); 584 if (unlikely(err < 0)) 585 return err; 586 err = snd_ctl_add 587 (dreamcastcard->card, 588 snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard)); 589 if (unlikely(err < 0)) 590 return err; 591 return 0; 592} 593 594static int __devexit snd_aica_remove(struct platform_device *devptr) 595{ 596 struct snd_card_aica *dreamcastcard; 597 dreamcastcard = platform_get_drvdata(devptr); 598 if (unlikely(!dreamcastcard)) 599 return -ENODEV; 600 snd_card_free(dreamcastcard->card); 601 kfree(dreamcastcard); 602 platform_set_drvdata(devptr, NULL); 603 return 0; 604} 605 606static int __devinit snd_aica_probe(struct platform_device *devptr) 607{ 608 int err; 609 struct snd_card_aica *dreamcastcard; 610 dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL); 611 if (unlikely(!dreamcastcard)) 612 return -ENOMEM; 613 err = snd_card_create(index, SND_AICA_DRIVER, THIS_MODULE, 0, 614 &dreamcastcard->card); 615 if (unlikely(err < 0)) { 616 kfree(dreamcastcard); 617 return err; 618 } 619 strcpy(dreamcastcard->card->driver, "snd_aica"); 620 strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER); 621 strcpy(dreamcastcard->card->longname, 622 "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast"); 623 /* Prepare to use the queue */ 624 INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma); 625 /* Load the PCM 'chip' */ 626 err = snd_aicapcmchip(dreamcastcard, 0); 627 if (unlikely(err < 0)) 628 goto freedreamcast; 629 snd_card_set_dev(dreamcastcard->card, &devptr->dev); 630 dreamcastcard->timer.data = 0; 631 dreamcastcard->channel = NULL; 632 /* Add basic controls */ 633 err = add_aicamixer_controls(dreamcastcard); 634 if (unlikely(err < 0)) 635 goto freedreamcast; 636 /* Register the card with ALSA subsystem */ 637 err = snd_card_register(dreamcastcard->card); 638 if (unlikely(err < 0)) 639 goto freedreamcast; 640 platform_set_drvdata(devptr, dreamcastcard); 641 aica_queue = create_workqueue(CARD_NAME); 642 if (unlikely(!aica_queue)) 643 goto freedreamcast; 644 snd_printk 645 ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n"); 646 return 0; 647 freedreamcast: 648 snd_card_free(dreamcastcard->card); 649 kfree(dreamcastcard); 650 return err; 651} 652 653static struct platform_driver snd_aica_driver = { 654 .probe = snd_aica_probe, 655 .remove = __devexit_p(snd_aica_remove), 656 .driver = { 657 .name = SND_AICA_DRIVER}, 658}; 659 660static int __init aica_init(void) 661{ 662 int err; 663 err = platform_driver_register(&snd_aica_driver); 664 if (unlikely(err < 0)) 665 return err; 666 pd = platform_device_register_simple(SND_AICA_DRIVER, -1, 667 aica_memory_space, 2); 668 if (IS_ERR(pd)) { 669 platform_driver_unregister(&snd_aica_driver); 670 return PTR_ERR(pd); 671 } 672 /* Load the firmware */ 673 return load_aica_firmware(); 674} 675 676static void __exit aica_exit(void) 677{ 678 /* Destroy the aica kernel thread * 679 * being extra cautious to check if it exists*/ 680 if (likely(aica_queue)) 681 destroy_workqueue(aica_queue); 682 platform_device_unregister(pd); 683 platform_driver_unregister(&snd_aica_driver); 684 /* Kill any sound still playing and reset ARM7 to safe state */ 685 spu_reset(); 686} 687 688module_init(aica_init); 689module_exit(aica_exit); 690