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 /* Use workqueue */ 67 static struct workqueue_struct *aica_queue; 68 69 /* Simple platform device */ 70 static struct platform_device *pd; 71 static 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 */ 88 static 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 */ 106 static 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 */ 123 static 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 */ 145 static 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 */ 169 static 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 */ 184 static 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 __raw_writel(0xea000002, SPU_MEMORY_BASE); 192 local_irq_restore(flags); 193 spu_enable(); 194 } 195 196 /* aica_chn_start - write to spu to start playback */ 197 static 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 */ 207 static 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 */ 217 static 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 }; 233 234 static 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 } 266 267 static 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 } 273 274 static 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 } 304 305 static 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 } 332 333 static 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 setup_timer(&dreamcastcard->timer, aica_period_elapsed, 347 (unsigned long) substream); 348 mod_timer(&dreamcastcard->timer, jiffies + 4); 349 } 350 351 static int snd_aicapcm_pcm_open(struct snd_pcm_substream 352 *substream) 353 { 354 struct snd_pcm_runtime *runtime; 355 struct aica_channel *channel; 356 struct snd_card_aica *dreamcastcard; 357 if (!enable) 358 return -ENOENT; 359 dreamcastcard = substream->pcm->private_data; 360 channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL); 361 if (!channel) 362 return -ENOMEM; 363 /* set defaults for channel */ 364 channel->sfmt = SM_8BIT; 365 channel->cmd = AICA_CMD_START; 366 channel->vol = dreamcastcard->master_volume; 367 channel->pan = 0x80; 368 channel->pos = 0; 369 channel->flags = 0; /* default to mono */ 370 dreamcastcard->channel = channel; 371 runtime = substream->runtime; 372 runtime->hw = snd_pcm_aica_playback_hw; 373 spu_enable(); 374 dreamcastcard->clicks = 0; 375 dreamcastcard->current_period = 0; 376 dreamcastcard->dma_check = 0; 377 return 0; 378 } 379 380 static int snd_aicapcm_pcm_close(struct snd_pcm_substream 381 *substream) 382 { 383 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 384 flush_workqueue(aica_queue); 385 if (dreamcastcard->timer.data) 386 del_timer(&dreamcastcard->timer); 387 kfree(dreamcastcard->channel); 388 spu_disable(); 389 return 0; 390 } 391 392 static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream 393 *substream) 394 { 395 /* Free the DMA buffer */ 396 return snd_pcm_lib_free_pages(substream); 397 } 398 399 static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream 400 *substream, struct snd_pcm_hw_params 401 *hw_params) 402 { 403 /* Allocate a DMA buffer using ALSA built-ins */ 404 return 405 snd_pcm_lib_malloc_pages(substream, 406 params_buffer_bytes(hw_params)); 407 } 408 409 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream 410 *substream) 411 { 412 struct snd_card_aica *dreamcastcard = substream->pcm->private_data; 413 if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE) 414 dreamcastcard->channel->sfmt = SM_16BIT; 415 dreamcastcard->channel->freq = substream->runtime->rate; 416 dreamcastcard->substream = substream; 417 return 0; 418 } 419 420 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream 421 *substream, int cmd) 422 { 423 switch (cmd) { 424 case SNDRV_PCM_TRIGGER_START: 425 spu_begin_dma(substream); 426 break; 427 case SNDRV_PCM_TRIGGER_STOP: 428 aica_chn_halt(); 429 break; 430 default: 431 return -EINVAL; 432 } 433 return 0; 434 } 435 436 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream 437 *substream) 438 { 439 return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER); 440 } 441 442 static struct snd_pcm_ops snd_aicapcm_playback_ops = { 443 .open = snd_aicapcm_pcm_open, 444 .close = snd_aicapcm_pcm_close, 445 .ioctl = snd_pcm_lib_ioctl, 446 .hw_params = snd_aicapcm_pcm_hw_params, 447 .hw_free = snd_aicapcm_pcm_hw_free, 448 .prepare = snd_aicapcm_pcm_prepare, 449 .trigger = snd_aicapcm_pcm_trigger, 450 .pointer = snd_aicapcm_pcm_pointer, 451 }; 452 453 /* TO DO: set up to handle more than one pcm instance */ 454 static int __init snd_aicapcmchip(struct snd_card_aica 455 *dreamcastcard, int pcm_index) 456 { 457 struct snd_pcm *pcm; 458 int err; 459 /* AICA has no capture ability */ 460 err = 461 snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0, 462 &pcm); 463 if (unlikely(err < 0)) 464 return err; 465 pcm->private_data = dreamcastcard; 466 strcpy(pcm->name, "AICA PCM"); 467 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 468 &snd_aicapcm_playback_ops); 469 /* Allocate the DMA buffers */ 470 err = 471 snd_pcm_lib_preallocate_pages_for_all(pcm, 472 SNDRV_DMA_TYPE_CONTINUOUS, 473 snd_dma_continuous_data 474 (GFP_KERNEL), 475 AICA_BUFFER_SIZE, 476 AICA_BUFFER_SIZE); 477 return err; 478 } 479 480 /* Mixer controls */ 481 #define aica_pcmswitch_info snd_ctl_boolean_mono_info 482 483 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol, 484 struct snd_ctl_elem_value *ucontrol) 485 { 486 ucontrol->value.integer.value[0] = 1; /* TO DO: Fix me */ 487 return 0; 488 } 489 490 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol, 491 struct snd_ctl_elem_value *ucontrol) 492 { 493 if (ucontrol->value.integer.value[0] == 1) 494 return 0; /* TO DO: Fix me */ 495 else 496 aica_chn_halt(); 497 return 0; 498 } 499 500 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol, 501 struct snd_ctl_elem_info *uinfo) 502 { 503 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 504 uinfo->count = 1; 505 uinfo->value.integer.min = 0; 506 uinfo->value.integer.max = 0xFF; 507 return 0; 508 } 509 510 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol, 511 struct snd_ctl_elem_value *ucontrol) 512 { 513 struct snd_card_aica *dreamcastcard; 514 dreamcastcard = kcontrol->private_data; 515 if (unlikely(!dreamcastcard->channel)) 516 return -ETXTBSY; /* we've not yet been set up */ 517 ucontrol->value.integer.value[0] = dreamcastcard->channel->vol; 518 return 0; 519 } 520 521 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol, 522 struct snd_ctl_elem_value *ucontrol) 523 { 524 struct snd_card_aica *dreamcastcard; 525 unsigned int vol; 526 dreamcastcard = kcontrol->private_data; 527 if (unlikely(!dreamcastcard->channel)) 528 return -ETXTBSY; 529 vol = ucontrol->value.integer.value[0]; 530 if (vol > 0xff) 531 return -EINVAL; 532 if (unlikely(dreamcastcard->channel->vol == vol)) 533 return 0; 534 dreamcastcard->channel->vol = ucontrol->value.integer.value[0]; 535 dreamcastcard->master_volume = ucontrol->value.integer.value[0]; 536 spu_memload(AICA_CHANNEL0_CONTROL_OFFSET, 537 dreamcastcard->channel, sizeof(struct aica_channel)); 538 return 1; 539 } 540 541 static struct snd_kcontrol_new snd_aica_pcmswitch_control = { 542 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 543 .name = "PCM Playback Switch", 544 .index = 0, 545 .info = aica_pcmswitch_info, 546 .get = aica_pcmswitch_get, 547 .put = aica_pcmswitch_put 548 }; 549 550 static struct snd_kcontrol_new snd_aica_pcmvolume_control = { 551 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 552 .name = "PCM Playback Volume", 553 .index = 0, 554 .info = aica_pcmvolume_info, 555 .get = aica_pcmvolume_get, 556 .put = aica_pcmvolume_put 557 }; 558 559 static int load_aica_firmware(void) 560 { 561 int err; 562 const struct firmware *fw_entry; 563 spu_reset(); 564 err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev); 565 if (unlikely(err)) 566 return err; 567 /* write firmware into memory */ 568 spu_disable(); 569 spu_memload(0, fw_entry->data, fw_entry->size); 570 spu_enable(); 571 release_firmware(fw_entry); 572 return err; 573 } 574 575 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard) 576 { 577 int err; 578 err = snd_ctl_add 579 (dreamcastcard->card, 580 snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard)); 581 if (unlikely(err < 0)) 582 return err; 583 err = snd_ctl_add 584 (dreamcastcard->card, 585 snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard)); 586 if (unlikely(err < 0)) 587 return err; 588 return 0; 589 } 590 591 static int snd_aica_remove(struct platform_device *devptr) 592 { 593 struct snd_card_aica *dreamcastcard; 594 dreamcastcard = platform_get_drvdata(devptr); 595 if (unlikely(!dreamcastcard)) 596 return -ENODEV; 597 snd_card_free(dreamcastcard->card); 598 kfree(dreamcastcard); 599 return 0; 600 } 601 602 static int snd_aica_probe(struct platform_device *devptr) 603 { 604 int err; 605 struct snd_card_aica *dreamcastcard; 606 dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL); 607 if (unlikely(!dreamcastcard)) 608 return -ENOMEM; 609 err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER, 610 THIS_MODULE, 0, &dreamcastcard->card); 611 if (unlikely(err < 0)) { 612 kfree(dreamcastcard); 613 return err; 614 } 615 strcpy(dreamcastcard->card->driver, "snd_aica"); 616 strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER); 617 strcpy(dreamcastcard->card->longname, 618 "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast"); 619 /* Prepare to use the queue */ 620 INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma); 621 /* Load the PCM 'chip' */ 622 err = snd_aicapcmchip(dreamcastcard, 0); 623 if (unlikely(err < 0)) 624 goto freedreamcast; 625 dreamcastcard->timer.data = 0; 626 dreamcastcard->channel = NULL; 627 /* Add basic controls */ 628 err = add_aicamixer_controls(dreamcastcard); 629 if (unlikely(err < 0)) 630 goto freedreamcast; 631 /* Register the card with ALSA subsystem */ 632 err = snd_card_register(dreamcastcard->card); 633 if (unlikely(err < 0)) 634 goto freedreamcast; 635 platform_set_drvdata(devptr, dreamcastcard); 636 aica_queue = create_workqueue(CARD_NAME); 637 if (unlikely(!aica_queue)) 638 goto freedreamcast; 639 snd_printk 640 ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n"); 641 return 0; 642 freedreamcast: 643 snd_card_free(dreamcastcard->card); 644 kfree(dreamcastcard); 645 return err; 646 } 647 648 static struct platform_driver snd_aica_driver = { 649 .probe = snd_aica_probe, 650 .remove = snd_aica_remove, 651 .driver = { 652 .name = SND_AICA_DRIVER, 653 }, 654 }; 655 656 static int __init aica_init(void) 657 { 658 int err; 659 err = platform_driver_register(&snd_aica_driver); 660 if (unlikely(err < 0)) 661 return err; 662 pd = platform_device_register_simple(SND_AICA_DRIVER, -1, 663 aica_memory_space, 2); 664 if (IS_ERR(pd)) { 665 platform_driver_unregister(&snd_aica_driver); 666 return PTR_ERR(pd); 667 } 668 /* Load the firmware */ 669 return load_aica_firmware(); 670 } 671 672 static void __exit aica_exit(void) 673 { 674 /* Destroy the aica kernel thread * 675 * being extra cautious to check if it exists*/ 676 if (likely(aica_queue)) 677 destroy_workqueue(aica_queue); 678 platform_device_unregister(pd); 679 platform_driver_unregister(&snd_aica_driver); 680 /* Kill any sound still playing and reset ARM7 to safe state */ 681 spu_reset(); 682 } 683 684 module_init(aica_init); 685 module_exit(aica_exit); 686