GNU Linux-libre 4.19.211-gnu1
[releases.git] / 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/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, const void *from, int length)
121 {
122         unsigned long flags;
123         const 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->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         mod_timer(&dreamcastcard->timer, jiffies + 4);
339 }
340
341 static int snd_aicapcm_pcm_open(struct snd_pcm_substream
342                                 *substream)
343 {
344         struct snd_pcm_runtime *runtime;
345         struct aica_channel *channel;
346         struct snd_card_aica *dreamcastcard;
347         if (!enable)
348                 return -ENOENT;
349         dreamcastcard = substream->pcm->private_data;
350         channel = kmalloc(sizeof(struct aica_channel), GFP_KERNEL);
351         if (!channel)
352                 return -ENOMEM;
353         /* set defaults for channel */
354         channel->sfmt = SM_8BIT;
355         channel->cmd = AICA_CMD_START;
356         channel->vol = dreamcastcard->master_volume;
357         channel->pan = 0x80;
358         channel->pos = 0;
359         channel->flags = 0;     /* default to mono */
360         dreamcastcard->channel = channel;
361         runtime = substream->runtime;
362         runtime->hw = snd_pcm_aica_playback_hw;
363         spu_enable();
364         dreamcastcard->clicks = 0;
365         dreamcastcard->current_period = 0;
366         dreamcastcard->dma_check = 0;
367         return 0;
368 }
369
370 static int snd_aicapcm_pcm_close(struct snd_pcm_substream
371                                  *substream)
372 {
373         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
374         flush_work(&(dreamcastcard->spu_dma_work));
375         del_timer(&dreamcastcard->timer);
376         dreamcastcard->substream = NULL;
377         kfree(dreamcastcard->channel);
378         spu_disable();
379         return 0;
380 }
381
382 static int snd_aicapcm_pcm_hw_free(struct snd_pcm_substream
383                                    *substream)
384 {
385         /* Free the DMA buffer */
386         return snd_pcm_lib_free_pages(substream);
387 }
388
389 static int snd_aicapcm_pcm_hw_params(struct snd_pcm_substream
390                                      *substream, struct snd_pcm_hw_params
391                                      *hw_params)
392 {
393         /* Allocate a DMA buffer using ALSA built-ins */
394         return
395             snd_pcm_lib_malloc_pages(substream,
396                                      params_buffer_bytes(hw_params));
397 }
398
399 static int snd_aicapcm_pcm_prepare(struct snd_pcm_substream
400                                    *substream)
401 {
402         struct snd_card_aica *dreamcastcard = substream->pcm->private_data;
403         if ((substream->runtime)->format == SNDRV_PCM_FORMAT_S16_LE)
404                 dreamcastcard->channel->sfmt = SM_16BIT;
405         dreamcastcard->channel->freq = substream->runtime->rate;
406         dreamcastcard->substream = substream;
407         return 0;
408 }
409
410 static int snd_aicapcm_pcm_trigger(struct snd_pcm_substream
411                                    *substream, int cmd)
412 {
413         switch (cmd) {
414         case SNDRV_PCM_TRIGGER_START:
415                 spu_begin_dma(substream);
416                 break;
417         case SNDRV_PCM_TRIGGER_STOP:
418                 aica_chn_halt();
419                 break;
420         default:
421                 return -EINVAL;
422         }
423         return 0;
424 }
425
426 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
427                                              *substream)
428 {
429         return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
430 }
431
432 static const struct snd_pcm_ops snd_aicapcm_playback_ops = {
433         .open = snd_aicapcm_pcm_open,
434         .close = snd_aicapcm_pcm_close,
435         .ioctl = snd_pcm_lib_ioctl,
436         .hw_params = snd_aicapcm_pcm_hw_params,
437         .hw_free = snd_aicapcm_pcm_hw_free,
438         .prepare = snd_aicapcm_pcm_prepare,
439         .trigger = snd_aicapcm_pcm_trigger,
440         .pointer = snd_aicapcm_pcm_pointer,
441 };
442
443 /* TO DO: set up to handle more than one pcm instance */
444 static int __init snd_aicapcmchip(struct snd_card_aica
445                                   *dreamcastcard, int pcm_index)
446 {
447         struct snd_pcm *pcm;
448         int err;
449         /* AICA has no capture ability */
450         err =
451             snd_pcm_new(dreamcastcard->card, "AICA PCM", pcm_index, 1, 0,
452                         &pcm);
453         if (unlikely(err < 0))
454                 return err;
455         pcm->private_data = dreamcastcard;
456         strcpy(pcm->name, "AICA PCM");
457         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
458                         &snd_aicapcm_playback_ops);
459         /* Allocate the DMA buffers */
460         err =
461             snd_pcm_lib_preallocate_pages_for_all(pcm,
462                                                   SNDRV_DMA_TYPE_CONTINUOUS,
463                                                   snd_dma_continuous_data
464                                                   (GFP_KERNEL),
465                                                   AICA_BUFFER_SIZE,
466                                                   AICA_BUFFER_SIZE);
467         return err;
468 }
469
470 /* Mixer controls */
471 #define aica_pcmswitch_info             snd_ctl_boolean_mono_info
472
473 static int aica_pcmswitch_get(struct snd_kcontrol *kcontrol,
474                               struct snd_ctl_elem_value *ucontrol)
475 {
476         ucontrol->value.integer.value[0] = 1;   /* TO DO: Fix me */
477         return 0;
478 }
479
480 static int aica_pcmswitch_put(struct snd_kcontrol *kcontrol,
481                               struct snd_ctl_elem_value *ucontrol)
482 {
483         if (ucontrol->value.integer.value[0] == 1)
484                 return 0;       /* TO DO: Fix me */
485         else
486                 aica_chn_halt();
487         return 0;
488 }
489
490 static int aica_pcmvolume_info(struct snd_kcontrol *kcontrol,
491                                struct snd_ctl_elem_info *uinfo)
492 {
493         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
494         uinfo->count = 1;
495         uinfo->value.integer.min = 0;
496         uinfo->value.integer.max = 0xFF;
497         return 0;
498 }
499
500 static int aica_pcmvolume_get(struct snd_kcontrol *kcontrol,
501                               struct snd_ctl_elem_value *ucontrol)
502 {
503         struct snd_card_aica *dreamcastcard;
504         dreamcastcard = kcontrol->private_data;
505         if (unlikely(!dreamcastcard->channel))
506                 return -ETXTBSY;        /* we've not yet been set up */
507         ucontrol->value.integer.value[0] = dreamcastcard->channel->vol;
508         return 0;
509 }
510
511 static int aica_pcmvolume_put(struct snd_kcontrol *kcontrol,
512                               struct snd_ctl_elem_value *ucontrol)
513 {
514         struct snd_card_aica *dreamcastcard;
515         unsigned int vol;
516         dreamcastcard = kcontrol->private_data;
517         if (unlikely(!dreamcastcard->channel))
518                 return -ETXTBSY;
519         vol = ucontrol->value.integer.value[0];
520         if (vol > 0xff)
521                 return -EINVAL;
522         if (unlikely(dreamcastcard->channel->vol == vol))
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, sizeof(struct aica_channel));
528         return 1;
529 }
530
531 static const struct snd_kcontrol_new snd_aica_pcmswitch_control = {
532         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
533         .name = "PCM Playback Switch",
534         .index = 0,
535         .info = aica_pcmswitch_info,
536         .get = aica_pcmswitch_get,
537         .put = aica_pcmswitch_put
538 };
539
540 static const struct snd_kcontrol_new snd_aica_pcmvolume_control = {
541         .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
542         .name = "PCM Playback Volume",
543         .index = 0,
544         .info = aica_pcmvolume_info,
545         .get = aica_pcmvolume_get,
546         .put = aica_pcmvolume_put
547 };
548
549 static int load_aica_firmware(void)
550 {
551         int err;
552         const struct firmware *fw_entry;
553         spu_reset();
554         err = request_firmware(&fw_entry, "aica_firmware.bin", &pd->dev);
555         if (unlikely(err))
556                 return err;
557         /* write firmware into memory */
558         spu_disable();
559         spu_memload(0, fw_entry->data, fw_entry->size);
560         spu_enable();
561         release_firmware(fw_entry);
562         return err;
563 }
564
565 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard)
566 {
567         int err;
568         err = snd_ctl_add
569             (dreamcastcard->card,
570              snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
571         if (unlikely(err < 0))
572                 return err;
573         err = snd_ctl_add
574             (dreamcastcard->card,
575              snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
576         if (unlikely(err < 0))
577                 return err;
578         return 0;
579 }
580
581 static int snd_aica_remove(struct platform_device *devptr)
582 {
583         struct snd_card_aica *dreamcastcard;
584         dreamcastcard = platform_get_drvdata(devptr);
585         if (unlikely(!dreamcastcard))
586                 return -ENODEV;
587         snd_card_free(dreamcastcard->card);
588         kfree(dreamcastcard);
589         return 0;
590 }
591
592 static int snd_aica_probe(struct platform_device *devptr)
593 {
594         int err;
595         struct snd_card_aica *dreamcastcard;
596         dreamcastcard = kzalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
597         if (unlikely(!dreamcastcard))
598                 return -ENOMEM;
599         err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER,
600                            THIS_MODULE, 0, &dreamcastcard->card);
601         if (unlikely(err < 0)) {
602                 kfree(dreamcastcard);
603                 return err;
604         }
605         strcpy(dreamcastcard->card->driver, "snd_aica");
606         strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
607         strcpy(dreamcastcard->card->longname,
608                "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
609         /* Prepare to use the queue */
610         INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
611         timer_setup(&dreamcastcard->timer, aica_period_elapsed, 0);
612         /* Load the PCM 'chip' */
613         err = snd_aicapcmchip(dreamcastcard, 0);
614         if (unlikely(err < 0))
615                 goto freedreamcast;
616         /* Add basic controls */
617         err = add_aicamixer_controls(dreamcastcard);
618         if (unlikely(err < 0))
619                 goto freedreamcast;
620         /* Register the card with ALSA subsystem */
621         err = snd_card_register(dreamcastcard->card);
622         if (unlikely(err < 0))
623                 goto freedreamcast;
624         platform_set_drvdata(devptr, dreamcastcard);
625         snd_printk
626             ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
627         return 0;
628       freedreamcast:
629         snd_card_free(dreamcastcard->card);
630         kfree(dreamcastcard);
631         return err;
632 }
633
634 static struct platform_driver snd_aica_driver = {
635         .probe = snd_aica_probe,
636         .remove = snd_aica_remove,
637         .driver = {
638                 .name = SND_AICA_DRIVER,
639         },
640 };
641
642 static int __init aica_init(void)
643 {
644         int err;
645         err = platform_driver_register(&snd_aica_driver);
646         if (unlikely(err < 0))
647                 return err;
648         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
649                                              aica_memory_space, 2);
650         if (IS_ERR(pd)) {
651                 platform_driver_unregister(&snd_aica_driver);
652                 return PTR_ERR(pd);
653         }
654         /* Load the firmware */
655         return load_aica_firmware();
656 }
657
658 static void __exit aica_exit(void)
659 {
660         platform_device_unregister(pd);
661         platform_driver_unregister(&snd_aica_driver);
662         /* Kill any sound still playing and reset ARM7 to safe state */
663         spu_reset();
664 }
665
666 module_init(aica_init);
667 module_exit(aica_exit);