Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
[sfrench/cifs-2.6.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/moduleparam.h>
33 #include <linux/platform_device.h>
34 #include <linux/firmware.h>
35 #include <linux/timer.h>
36 #include <linux/delay.h>
37 #include <linux/workqueue.h>
38 #include <sound/core.h>
39 #include <sound/control.h>
40 #include <sound/pcm.h>
41 #include <sound/initval.h>
42 #include <sound/info.h>
43 #include <asm/io.h>
44 #include <asm/dma.h>
45 #include <asm/dreamcast/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
53 /* module parameters */
54 #define CARD_NAME "AICA"
55 static int index = -1;
56 static char *id;
57 static int enable = 1;
58 module_param(index, int, 0444);
59 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
60 module_param(id, charp, 0444);
61 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
62 module_param(enable, bool, 0644);
63 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
64
65 /* Use workqueue */
66 static struct workqueue_struct *aica_queue;
67
68 /* Simple platform device */
69 static struct platform_device *pd;
70 static struct resource aica_memory_space[2] = {
71         {
72          .name = "AICA ARM CONTROL",
73          .start = ARM_RESET_REGISTER,
74          .flags = IORESOURCE_MEM,
75          .end = ARM_RESET_REGISTER + 3,
76          },
77         {
78          .name = "AICA Sound RAM",
79          .start = SPU_MEMORY_BASE,
80          .flags = IORESOURCE_MEM,
81          .end = SPU_MEMORY_BASE + 0x200000 - 1,
82          },
83 };
84
85 /* SPU specific functions */
86 /* spu_write_wait - wait for G2-SH FIFO to clear */
87 static void spu_write_wait(void)
88 {
89         int time_count;
90         time_count = 0;
91         while (1) {
92                 if (!(readl(G2_FIFO) & 0x11))
93                         break;
94                 /* To ensure hardware failure doesn't wedge kernel */
95                 time_count++;
96                 if (time_count > 0x10000) {
97                         snd_printk
98                             ("WARNING: G2 FIFO appears to be blocked.\n");
99                         break;
100                 }
101         }
102 }
103
104 /* spu_memset - write to memory in SPU address space */
105 static void spu_memset(u32 toi, u32 what, int length)
106 {
107         int i;
108         unsigned long flags;
109         snd_assert(length % 4 == 0, return);
110         for (i = 0; i < length; i++) {
111                 if (!(i % 8))
112                         spu_write_wait();
113                 local_irq_save(flags);
114                 writel(what, toi + SPU_MEMORY_BASE);
115                 local_irq_restore(flags);
116                 toi++;
117         }
118 }
119
120 /* spu_memload - write to SPU address space */
121 static void spu_memload(u32 toi, void *from, int length)
122 {
123         unsigned long flags;
124         u32 *froml = from;
125         u32 __iomem *to = (u32 __iomem *) (SPU_MEMORY_BASE + toi);
126         int i;
127         u32 val;
128         length = DIV_ROUND_UP(length, 4);
129         spu_write_wait();
130         for (i = 0; i < length; i++) {
131                 if (!(i % 8))
132                         spu_write_wait();
133                 val = *froml;
134                 local_irq_save(flags);
135                 writel(val, to);
136                 local_irq_restore(flags);
137                 froml++;
138                 to++;
139         }
140 }
141
142 /* spu_disable - set spu registers to stop sound output */
143 static void spu_disable(void)
144 {
145         int i;
146         unsigned long flags;
147         u32 regval;
148         spu_write_wait();
149         regval = readl(ARM_RESET_REGISTER);
150         regval |= 1;
151         spu_write_wait();
152         local_irq_save(flags);
153         writel(regval, ARM_RESET_REGISTER);
154         local_irq_restore(flags);
155         for (i = 0; i < 64; i++) {
156                 spu_write_wait();
157                 regval = readl(SPU_REGISTER_BASE + (i * 0x80));
158                 regval = (regval & ~0x4000) | 0x8000;
159                 spu_write_wait();
160                 local_irq_save(flags);
161                 writel(regval, SPU_REGISTER_BASE + (i * 0x80));
162                 local_irq_restore(flags);
163         }
164 }
165
166 /* spu_enable - set spu registers to enable sound output */
167 static void spu_enable(void)
168 {
169         unsigned long flags;
170         u32 regval = readl(ARM_RESET_REGISTER);
171         regval &= ~1;
172         spu_write_wait();
173         local_irq_save(flags);
174         writel(regval, ARM_RESET_REGISTER);
175         local_irq_restore(flags);
176 }
177
178 /* 
179  * Halt the sound processor, clear the memory,
180  * load some default ARM7 code, and then restart ARM7
181 */
182 static void spu_reset(void)
183 {
184         unsigned long flags;
185         spu_disable();
186         spu_memset(0, 0, 0x200000 / 4);
187         /* Put ARM7 in endless loop */
188         local_irq_save(flags);
189         ctrl_outl(0xea000002, SPU_MEMORY_BASE);
190         local_irq_restore(flags);
191         spu_enable();
192 }
193
194 /* aica_chn_start - write to spu to start playback */
195 static void aica_chn_start(void)
196 {
197         unsigned long flags;
198         spu_write_wait();
199         local_irq_save(flags);
200         writel(AICA_CMD_KICK | AICA_CMD_START, (u32 *) AICA_CONTROL_POINT);
201         local_irq_restore(flags);
202 }
203
204 /* aica_chn_halt - write to spu to halt playback */
205 static void aica_chn_halt(void)
206 {
207         unsigned long flags;
208         spu_write_wait();
209         local_irq_save(flags);
210         writel(AICA_CMD_KICK | AICA_CMD_STOP, (u32 *) AICA_CONTROL_POINT);
211         local_irq_restore(flags);
212 }
213
214 /* ALSA code below */
215 static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
216         .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
217         .formats =
218             (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
219              SNDRV_PCM_FMTBIT_IMA_ADPCM),
220         .rates = SNDRV_PCM_RATE_8000_48000,
221         .rate_min = 8000,
222         .rate_max = 48000,
223         .channels_min = 1,
224         .channels_max = 2,
225         .buffer_bytes_max = AICA_BUFFER_SIZE,
226         .period_bytes_min = AICA_PERIOD_SIZE,
227         .period_bytes_max = AICA_PERIOD_SIZE,
228         .periods_min = AICA_PERIOD_NUMBER,
229         .periods_max = AICA_PERIOD_NUMBER,
230 };
231
232 static int aica_dma_transfer(int channels, int buffer_size,
233                              struct snd_pcm_substream *substream)
234 {
235         int q, err, period_offset;
236         struct snd_card_aica *dreamcastcard;
237         struct snd_pcm_runtime *runtime;
238         unsigned long flags;
239         err = 0;
240         dreamcastcard = substream->pcm->private_data;
241         period_offset = dreamcastcard->clicks;
242         period_offset %= (AICA_PERIOD_NUMBER / channels);
243         runtime = substream->runtime;
244         for (q = 0; q < channels; q++) {
245                 local_irq_save(flags);
246                 err = dma_xfer(AICA_DMA_CHANNEL,
247                                (unsigned long) (runtime->dma_area +
248                                                 (AICA_BUFFER_SIZE * q) /
249                                                 channels +
250                                                 AICA_PERIOD_SIZE *
251                                                 period_offset),
252                                AICA_CHANNEL0_OFFSET + q * CHANNEL_OFFSET +
253                                AICA_PERIOD_SIZE * period_offset,
254                                buffer_size / channels, AICA_DMA_MODE);
255                 if (unlikely(err < 0)) {
256                         local_irq_restore(flags);
257                         break;
258                 }
259                 dma_wait_for_completion(AICA_DMA_CHANNEL);
260                 local_irq_restore(flags);
261         }
262         return err;
263 }
264
265 static void startup_aica(struct snd_card_aica *dreamcastcard)
266 {
267         spu_memload(AICA_CHANNEL0_CONTROL_OFFSET,
268                     dreamcastcard->channel, sizeof(struct aica_channel));
269         aica_chn_start();
270 }
271
272 static void run_spu_dma(struct work_struct *work)
273 {
274         int buffer_size;
275         struct snd_pcm_runtime *runtime;
276         struct snd_card_aica *dreamcastcard;
277         dreamcastcard =
278             container_of(work, struct snd_card_aica, spu_dma_work);
279         runtime = dreamcastcard->substream->runtime;
280         if (unlikely(dreamcastcard->dma_check == 0)) {
281                 buffer_size =
282                     frames_to_bytes(runtime, runtime->buffer_size);
283                 if (runtime->channels > 1)
284                         dreamcastcard->channel->flags |= 0x01;
285                 aica_dma_transfer(runtime->channels, buffer_size,
286                                   dreamcastcard->substream);
287                 startup_aica(dreamcastcard);
288                 dreamcastcard->clicks =
289                     buffer_size / (AICA_PERIOD_SIZE * runtime->channels);
290                 return;
291         } else {
292                 aica_dma_transfer(runtime->channels,
293                                   AICA_PERIOD_SIZE * runtime->channels,
294                                   dreamcastcard->substream);
295                 snd_pcm_period_elapsed(dreamcastcard->substream);
296                 dreamcastcard->clicks++;
297                 if (unlikely(dreamcastcard->clicks >= AICA_PERIOD_NUMBER))
298                         dreamcastcard->clicks %= AICA_PERIOD_NUMBER;
299                 mod_timer(&dreamcastcard->timer, jiffies + 1);
300         }
301 }
302
303 static void aica_period_elapsed(unsigned long timer_var)
304 {
305         /*timer function - so cannot sleep */
306         int play_period;
307         struct snd_pcm_runtime *runtime;
308         struct snd_pcm_substream *substream;
309         struct snd_card_aica *dreamcastcard;
310         substream = (struct snd_pcm_substream *) timer_var;
311         runtime = substream->runtime;
312         dreamcastcard = substream->pcm->private_data;
313         /* Have we played out an additional period? */
314         play_period =
315             frames_to_bytes(runtime,
316                             readl
317                             (AICA_CONTROL_CHANNEL_SAMPLE_NUMBER)) /
318             AICA_PERIOD_SIZE;
319         if (play_period == dreamcastcard->current_period) {
320                 /* reschedule the timer */
321                 mod_timer(&(dreamcastcard->timer), jiffies + 1);
322                 return;
323         }
324         if (runtime->channels > 1)
325                 dreamcastcard->current_period = play_period;
326         if (unlikely(dreamcastcard->dma_check == 0))
327                 dreamcastcard->dma_check = 1;
328         queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
329 }
330
331 static void spu_begin_dma(struct snd_pcm_substream *substream)
332 {
333         struct snd_card_aica *dreamcastcard;
334         struct snd_pcm_runtime *runtime;
335         runtime = substream->runtime;
336         dreamcastcard = substream->pcm->private_data;
337         /*get the queue to do the work */
338         queue_work(aica_queue, &(dreamcastcard->spu_dma_work));
339         /* Timer may already be running */
340         if (unlikely(dreamcastcard->timer.data)) {
341                 mod_timer(&dreamcastcard->timer, jiffies + 4);
342                 return;
343         }
344         init_timer(&(dreamcastcard->timer));
345         dreamcastcard->timer.data = (unsigned long) substream;
346         dreamcastcard->timer.function = aica_period_elapsed;
347         dreamcastcard->timer.expires = jiffies + 4;
348         add_timer(&(dreamcastcard->timer));
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 __devinitdata = {
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 __devinitdata = {
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 firware 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 __devinit add_aicamixer_controls(struct snd_card_aica
576                                             *dreamcastcard)
577 {
578         int err;
579         err = snd_ctl_add
580             (dreamcastcard->card,
581              snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard));
582         if (unlikely(err < 0))
583                 return err;
584         err = snd_ctl_add
585             (dreamcastcard->card,
586              snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard));
587         if (unlikely(err < 0))
588                 return err;
589         return 0;
590 }
591
592 static int snd_aica_remove(struct platform_device *devptr)
593 {
594         struct snd_card_aica *dreamcastcard;
595         dreamcastcard = platform_get_drvdata(devptr);
596         if (unlikely(!dreamcastcard))
597                 return -ENODEV;
598         snd_card_free(dreamcastcard->card);
599         kfree(dreamcastcard);
600         platform_set_drvdata(devptr, NULL);
601         return 0;
602 }
603
604 static int __init 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         dreamcastcard->card =
612             snd_card_new(index, SND_AICA_DRIVER, THIS_MODULE, 0);
613         if (unlikely(!dreamcastcard->card)) {
614                 kfree(dreamcastcard);
615                 return -ENODEV;
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         snd_card_set_dev(dreamcastcard->card, &devptr->dev);
628         dreamcastcard->timer.data = 0;
629         dreamcastcard->channel = NULL;
630         /* Add basic controls */
631         err = add_aicamixer_controls(dreamcastcard);
632         if (unlikely(err < 0))
633                 goto freedreamcast;
634         /* Register the card with ALSA subsystem */
635         err = snd_card_register(dreamcastcard->card);
636         if (unlikely(err < 0))
637                 goto freedreamcast;
638         platform_set_drvdata(devptr, dreamcastcard);
639         aica_queue = create_workqueue(CARD_NAME);
640         if (unlikely(!aica_queue))
641                 goto freedreamcast;
642         snd_printk
643             ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n");
644         return 0;
645       freedreamcast:
646         snd_card_free(dreamcastcard->card);
647         kfree(dreamcastcard);
648         return err;
649 }
650
651 static struct platform_driver snd_aica_driver = {
652         .probe = snd_aica_probe,
653         .remove = snd_aica_remove,
654         .driver = {
655                    .name = SND_AICA_DRIVER},
656 };
657
658 static int __init aica_init(void)
659 {
660         int err;
661         err = platform_driver_register(&snd_aica_driver);
662         if (unlikely(err < 0))
663                 return err;
664         pd = platform_device_register_simple(SND_AICA_DRIVER, -1,
665                                              aica_memory_space, 2);
666         if (unlikely(IS_ERR(pd))) {
667                 platform_driver_unregister(&snd_aica_driver);
668                 return PTR_ERR(pd);
669         }
670         /* Load the firmware */
671         return load_aica_firmware();
672 }
673
674 static void __exit aica_exit(void)
675 {
676         /* Destroy the aica kernel thread            *
677          * being extra cautious to check if it exists*/
678         if (likely(aica_queue))
679                 destroy_workqueue(aica_queue);
680         platform_device_unregister(pd);
681         platform_driver_unregister(&snd_aica_driver);
682         /* Kill any sound still playing and reset ARM7 to safe state */
683         spu_reset();
684 }
685
686 module_init(aica_init);
687 module_exit(aica_exit);