Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

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 <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 
 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         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 
353 static 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 
382 static 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 
394 static 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 
401 static 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 
411 static 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 
422 static 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 
438 static unsigned long snd_aicapcm_pcm_pointer(struct snd_pcm_substream
439                                              *substream)
440 {
441         return readl(AICA_CONTROL_CHANNEL_SAMPLE_NUMBER);
442 }
443 
444 static 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 */
456 static 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 
485 static 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 
492 static 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 
502 static 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 
512 static 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 
523 static 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 
543 static struct snd_kcontrol_new snd_aica_pcmswitch_control = {
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 
552 static struct snd_kcontrol_new snd_aica_pcmvolume_control = {
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 
561 static 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 
577 static int add_aicamixer_controls(struct snd_card_aica *dreamcastcard)
578 {
579         int err;
580         err = snd_ctl_add
581             (dreamcastcard->card,
582              snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
583         if (unlikely(err < 0))
584                 return err;
585         err = snd_ctl_add
586             (dreamcastcard->card,
587              snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
588         if (unlikely(err < 0))
589                 return err;
590         return 0;
591 }
592 
593 static int snd_aica_remove(struct platform_device *devptr)
594 {
595         struct snd_card_aica *dreamcastcard;
596         dreamcastcard = platform_get_drvdata(devptr);
597         if (unlikely(!dreamcastcard))
598                 return -ENODEV;
599         snd_card_free(dreamcastcard->card);
600         kfree(dreamcastcard);
601         return 0;
602 }
603 
604 static int snd_aica_probe(struct platform_device *devptr)
605 {
606         int err;
607         struct snd_card_aica *dreamcastcard;
608         dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL);
609         if (unlikely(!dreamcastcard))
610                 return -ENOMEM;
611         err = snd_card_new(&devptr->dev, index, SND_AICA_DRIVER,
612                            THIS_MODULE, 0, &dreamcastcard->card);
613         if (unlikely(err < 0)) {
614                 kfree(dreamcastcard);
615                 return err;
616         }
617         strcpy(dreamcastcard->card->driver, "snd_aica");
618         strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER);
619         strcpy(dreamcastcard->card->longname,
620                "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast");
621         /* Prepare to use the queue */
622         INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma);
623         /* Load the PCM 'chip' */
624         err = snd_aicapcmchip(dreamcastcard, 0);
625         if (unlikely(err < 0))
626                 goto freedreamcast;
627         dreamcastcard->timer.data = 0;
628         dreamcastcard->channel = NULL;
629         /* Add basic controls */
630         err = add_aicamixer_controls(dreamcastcard);
631         if (unlikely(err < 0))
632                 goto freedreamcast;
633         /* Register the card with ALSA subsystem */
634         err = snd_card_register(dreamcastcard->card);
635         if (unlikely(err < 0))
636                 goto freedreamcast;
637         platform_set_drvdata(devptr, dreamcastcard);
638         aica_queue = create_workqueue(CARD_NAME);
639         if (unlikely(!aica_queue))
640                 goto freedreamcast;
641         snd_printk
642             ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
643         return 0;
644       freedreamcast:
645         snd_card_free(dreamcastcard->card);
646         kfree(dreamcastcard);
647         return err;
648 }
649 
650 static struct platform_driver snd_aica_driver = {
651         .probe = snd_aica_probe,
652         .remove = snd_aica_remove,
653         .driver = {
654                 .name = SND_AICA_DRIVER,
655                 .owner  = THIS_MODULE,
656         },
657 };
658 
659 static int __init aica_init(void)
660 {
661         int err;
662         err = platform_driver_register(&snd_aica_driver);
663         if (unlikely(err < 0))
664                 return err;
665         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
666                                              aica_memory_space, 2);
667         if (IS_ERR(pd)) {
668                 platform_driver_unregister(&snd_aica_driver);
669                 return PTR_ERR(pd);
670         }
671         /* Load the firmware */
672         return load_aica_firmware();
673 }
674 
675 static void __exit aica_exit(void)
676 {
677         /* Destroy the aica kernel thread            *
678          * being extra cautious to check if it exists*/
679         if (likely(aica_queue))
680                 destroy_workqueue(aica_queue);
681         platform_device_unregister(pd);
682         platform_driver_unregister(&snd_aica_driver);
683         /* Kill any sound still playing and reset ARM7 to safe state */
684         spu_reset();
685 }
686 
687 module_init(aica_init);
688 module_exit(aica_exit);
689 

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