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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 <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 int 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 | ctrl_outl(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 __devinitdata = { |
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 __devinitdata = { |
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 __devinit add_aicamixer_controls(struct snd_card_aica |
578 | *dreamcastcard) |
579 | { |
580 | int err; |
581 | err = snd_ctl_add |
582 | (dreamcastcard->card, |
583 | snd_ctl_new1(&snd_aica_pcmvolume_control, dreamcastcard)); |
584 | if (unlikely(err < 0)) |
585 | return err; |
586 | err = snd_ctl_add |
587 | (dreamcastcard->card, |
588 | snd_ctl_new1(&snd_aica_pcmswitch_control, dreamcastcard)); |
589 | if (unlikely(err < 0)) |
590 | return err; |
591 | return 0; |
592 | } |
593 | |
594 | static int __devexit snd_aica_remove(struct platform_device *devptr) |
595 | { |
596 | struct snd_card_aica *dreamcastcard; |
597 | dreamcastcard = platform_get_drvdata(devptr); |
598 | if (unlikely(!dreamcastcard)) |
599 | return -ENODEV; |
600 | snd_card_free(dreamcastcard->card); |
601 | kfree(dreamcastcard); |
602 | platform_set_drvdata(devptr, NULL); |
603 | return 0; |
604 | } |
605 | |
606 | static int __devinit snd_aica_probe(struct platform_device *devptr) |
607 | { |
608 | int err; |
609 | struct snd_card_aica *dreamcastcard; |
610 | dreamcastcard = kmalloc(sizeof(struct snd_card_aica), GFP_KERNEL); |
611 | if (unlikely(!dreamcastcard)) |
612 | return -ENOMEM; |
613 | err = snd_card_create(index, SND_AICA_DRIVER, THIS_MODULE, 0, |
614 | &dreamcastcard->card); |
615 | if (unlikely(err < 0)) { |
616 | kfree(dreamcastcard); |
617 | return err; |
618 | } |
619 | strcpy(dreamcastcard->card->driver, "snd_aica"); |
620 | strcpy(dreamcastcard->card->shortname, SND_AICA_DRIVER); |
621 | strcpy(dreamcastcard->card->longname, |
622 | "Yamaha AICA Super Intelligent Sound Processor for SEGA Dreamcast"); |
623 | /* Prepare to use the queue */ |
624 | INIT_WORK(&(dreamcastcard->spu_dma_work), run_spu_dma); |
625 | /* Load the PCM 'chip' */ |
626 | err = snd_aicapcmchip(dreamcastcard, 0); |
627 | if (unlikely(err < 0)) |
628 | goto freedreamcast; |
629 | snd_card_set_dev(dreamcastcard->card, &devptr->dev); |
630 | dreamcastcard->timer.data = 0; |
631 | dreamcastcard->channel = NULL; |
632 | /* Add basic controls */ |
633 | err = add_aicamixer_controls(dreamcastcard); |
634 | if (unlikely(err < 0)) |
635 | goto freedreamcast; |
636 | /* Register the card with ALSA subsystem */ |
637 | err = snd_card_register(dreamcastcard->card); |
638 | if (unlikely(err < 0)) |
639 | goto freedreamcast; |
640 | platform_set_drvdata(devptr, dreamcastcard); |
641 | aica_queue = create_workqueue(CARD_NAME); |
642 | if (unlikely(!aica_queue)) |
643 | goto freedreamcast; |
644 | snd_printk |
645 | ("ALSA Driver for Yamaha AICA Super Intelligent Sound Processor\n"); |
646 | return 0; |
647 | freedreamcast: |
648 | snd_card_free(dreamcastcard->card); |
649 | kfree(dreamcastcard); |
650 | return err; |
651 | } |
652 | |
653 | static struct platform_driver snd_aica_driver = { |
654 | .probe = snd_aica_probe, |
655 | .remove = __devexit_p(snd_aica_remove), |
656 | .driver = { |
657 | .name = SND_AICA_DRIVER}, |
658 | }; |
659 | |
660 | static int __init aica_init(void) |
661 | { |
662 | int err; |
663 | err = platform_driver_register(&snd_aica_driver); |
664 | if (unlikely(err < 0)) |
665 | return err; |
666 | pd = platform_device_register_simple(SND_AICA_DRIVER, -1, |
667 | aica_memory_space, 2); |
668 | if (IS_ERR(pd)) { |
669 | platform_driver_unregister(&snd_aica_driver); |
670 | return PTR_ERR(pd); |
671 | } |
672 | /* Load the firmware */ |
673 | return load_aica_firmware(); |
674 | } |
675 | |
676 | static void __exit aica_exit(void) |
677 | { |
678 | /* Destroy the aica kernel thread * |
679 | * being extra cautious to check if it exists*/ |
680 | if (likely(aica_queue)) |
681 | destroy_workqueue(aica_queue); |
682 | platform_device_unregister(pd); |
683 | platform_driver_unregister(&snd_aica_driver); |
684 | /* Kill any sound still playing and reset ARM7 to safe state */ |
685 | spu_reset(); |
686 | } |
687 | |
688 | module_init(aica_init); |
689 | module_exit(aica_exit); |
690 |
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