Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

Linux/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, 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 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(unsigned long timer_var)
303 {
304         /*timer function - so cannot sleep */
305         int play_period;
306         struct snd_pcm_runtime *runtime;
307         struct snd_pcm_substream *substream;
308         struct snd_card_aica *dreamcastcard;
309         substream = (struct snd_pcm_substream *) timer_var;
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.data)) {
340                 mod_timer(&dreamcastcard->timer, jiffies + 4);
341                 return;
342         }
343         setup_timer(&dreamcastcard->timer, aica_period_elapsed,
344                     (unsigned long) 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.data)
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 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 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 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 = kmalloc(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         dreamcastcard->timer.data = 0;
623         dreamcastcard->channel = NULL;
624         /* Add basic controls */
625         err = add_aicamixer_controls(dreamcastcard);
626         if (unlikely(err < 0))
627                 goto freedreamcast;
628         /* Register the card with ALSA subsystem */
629         err = snd_card_register(dreamcastcard->card);
630         if (unlikely(err < 0))
631                 goto freedreamcast;
632         platform_set_drvdata(devptr, dreamcastcard);
633         snd_printk
634             ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
635         return 0;
636       freedreamcast:
637         snd_card_free(dreamcastcard->card);
638         kfree(dreamcastcard);
639         return err;
640 }
641 
642 static struct platform_driver snd_aica_driver = {
643         .probe = snd_aica_probe,
644         .remove = snd_aica_remove,
645         .driver = {
646                 .name = SND_AICA_DRIVER,
647         },
648 };
649 
650 static int __init aica_init(void)
651 {
652         int err;
653         err = platform_driver_register(&snd_aica_driver);
654         if (unlikely(err < 0))
655                 return err;
656         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
657                                              aica_memory_space, 2);
658         if (IS_ERR(pd)) {
659                 platform_driver_unregister(&snd_aica_driver);
660                 return PTR_ERR(pd);
661         }
662         /* Load the firmware */
663         return load_aica_firmware();
664 }
665 
666 static void __exit aica_exit(void)
667 {
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);
676 

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