Root/
1 | /* |
2 | * Sound driver for Silicon Graphics O2 Workstations A/V board audio. |
3 | * |
4 | * Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org> |
5 | * Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
6 | * Mxier part taken from mace_audio.c: |
7 | * Copyright 2007 Thorben Jändling <tj.trevelyan@gmail.com> |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
13 | * |
14 | * This program is distributed in the hope that it will be useful, |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | * GNU General Public License for more details. |
18 | * |
19 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
22 | * |
23 | */ |
24 | |
25 | #include <linux/init.h> |
26 | #include <linux/delay.h> |
27 | #include <linux/spinlock.h> |
28 | #include <linux/gfp.h> |
29 | #include <linux/vmalloc.h> |
30 | #include <linux/interrupt.h> |
31 | #include <linux/dma-mapping.h> |
32 | #include <linux/platform_device.h> |
33 | #include <linux/io.h> |
34 | |
35 | #include <asm/ip32/ip32_ints.h> |
36 | #include <asm/ip32/mace.h> |
37 | |
38 | #include <sound/core.h> |
39 | #include <sound/control.h> |
40 | #include <sound/pcm.h> |
41 | #define SNDRV_GET_ID |
42 | #include <sound/initval.h> |
43 | #include <sound/ad1843.h> |
44 | |
45 | |
46 | MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>"); |
47 | MODULE_DESCRIPTION("SGI O2 Audio"); |
48 | MODULE_LICENSE("GPL"); |
49 | MODULE_SUPPORTED_DEVICE("{{Silicon Graphics, O2 Audio}}"); |
50 | |
51 | static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */ |
52 | static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ |
53 | |
54 | module_param(index, int, 0444); |
55 | MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard."); |
56 | module_param(id, charp, 0444); |
57 | MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard."); |
58 | |
59 | |
60 | #define AUDIO_CONTROL_RESET BIT(0) /* 1: reset audio interface */ |
61 | #define AUDIO_CONTROL_CODEC_PRESENT BIT(1) /* 1: codec detected */ |
62 | |
63 | #define CODEC_CONTROL_WORD_SHIFT 0 |
64 | #define CODEC_CONTROL_READ BIT(16) |
65 | #define CODEC_CONTROL_ADDRESS_SHIFT 17 |
66 | |
67 | #define CHANNEL_CONTROL_RESET BIT(10) /* 1: reset channel */ |
68 | #define CHANNEL_DMA_ENABLE BIT(9) /* 1: enable DMA transfer */ |
69 | #define CHANNEL_INT_THRESHOLD_DISABLED (0 << 5) /* interrupt disabled */ |
70 | #define CHANNEL_INT_THRESHOLD_25 (1 << 5) /* int on buffer >25% full */ |
71 | #define CHANNEL_INT_THRESHOLD_50 (2 << 5) /* int on buffer >50% full */ |
72 | #define CHANNEL_INT_THRESHOLD_75 (3 << 5) /* int on buffer >75% full */ |
73 | #define CHANNEL_INT_THRESHOLD_EMPTY (4 << 5) /* int on buffer empty */ |
74 | #define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */ |
75 | #define CHANNEL_INT_THRESHOLD_FULL (6 << 5) /* int on buffer empty */ |
76 | #define CHANNEL_INT_THRESHOLD_NOT_FULL (7 << 5) /* int on buffer !empty */ |
77 | |
78 | #define CHANNEL_RING_SHIFT 12 |
79 | #define CHANNEL_RING_SIZE (1 << CHANNEL_RING_SHIFT) |
80 | #define CHANNEL_RING_MASK (CHANNEL_RING_SIZE - 1) |
81 | |
82 | #define CHANNEL_LEFT_SHIFT 40 |
83 | #define CHANNEL_RIGHT_SHIFT 8 |
84 | |
85 | struct snd_sgio2audio_chan { |
86 | int idx; |
87 | struct snd_pcm_substream *substream; |
88 | int pos; |
89 | snd_pcm_uframes_t size; |
90 | spinlock_t lock; |
91 | }; |
92 | |
93 | /* definition of the chip-specific record */ |
94 | struct snd_sgio2audio { |
95 | struct snd_card *card; |
96 | |
97 | /* codec */ |
98 | struct snd_ad1843 ad1843; |
99 | spinlock_t ad1843_lock; |
100 | |
101 | /* channels */ |
102 | struct snd_sgio2audio_chan channel[3]; |
103 | |
104 | /* resources */ |
105 | void *ring_base; |
106 | dma_addr_t ring_base_dma; |
107 | }; |
108 | |
109 | /* AD1843 access */ |
110 | |
111 | /* |
112 | * read_ad1843_reg returns the current contents of a 16 bit AD1843 register. |
113 | * |
114 | * Returns unsigned register value on success, -errno on failure. |
115 | */ |
116 | static int read_ad1843_reg(void *priv, int reg) |
117 | { |
118 | struct snd_sgio2audio *chip = priv; |
119 | int val; |
120 | unsigned long flags; |
121 | |
122 | spin_lock_irqsave(&chip->ad1843_lock, flags); |
123 | |
124 | writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) | |
125 | CODEC_CONTROL_READ, &mace->perif.audio.codec_control); |
126 | wmb(); |
127 | val = readq(&mace->perif.audio.codec_control); /* flush bus */ |
128 | udelay(200); |
129 | |
130 | val = readq(&mace->perif.audio.codec_read); |
131 | |
132 | spin_unlock_irqrestore(&chip->ad1843_lock, flags); |
133 | return val; |
134 | } |
135 | |
136 | /* |
137 | * write_ad1843_reg writes the specified value to a 16 bit AD1843 register. |
138 | */ |
139 | static int write_ad1843_reg(void *priv, int reg, int word) |
140 | { |
141 | struct snd_sgio2audio *chip = priv; |
142 | int val; |
143 | unsigned long flags; |
144 | |
145 | spin_lock_irqsave(&chip->ad1843_lock, flags); |
146 | |
147 | writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) | |
148 | (word << CODEC_CONTROL_WORD_SHIFT), |
149 | &mace->perif.audio.codec_control); |
150 | wmb(); |
151 | val = readq(&mace->perif.audio.codec_control); /* flush bus */ |
152 | udelay(200); |
153 | |
154 | spin_unlock_irqrestore(&chip->ad1843_lock, flags); |
155 | return 0; |
156 | } |
157 | |
158 | static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol, |
159 | struct snd_ctl_elem_info *uinfo) |
160 | { |
161 | struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol); |
162 | |
163 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
164 | uinfo->count = 2; |
165 | uinfo->value.integer.min = 0; |
166 | uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843, |
167 | (int)kcontrol->private_value); |
168 | return 0; |
169 | } |
170 | |
171 | static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol, |
172 | struct snd_ctl_elem_value *ucontrol) |
173 | { |
174 | struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol); |
175 | int vol; |
176 | |
177 | vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value); |
178 | |
179 | ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF; |
180 | ucontrol->value.integer.value[1] = vol & 0xFF; |
181 | |
182 | return 0; |
183 | } |
184 | |
185 | static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol, |
186 | struct snd_ctl_elem_value *ucontrol) |
187 | { |
188 | struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol); |
189 | int newvol, oldvol; |
190 | |
191 | oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value); |
192 | newvol = (ucontrol->value.integer.value[0] << 8) | |
193 | ucontrol->value.integer.value[1]; |
194 | |
195 | newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value, |
196 | newvol); |
197 | |
198 | return newvol != oldvol; |
199 | } |
200 | |
201 | static int sgio2audio_source_info(struct snd_kcontrol *kcontrol, |
202 | struct snd_ctl_elem_info *uinfo) |
203 | { |
204 | static const char *texts[3] = { |
205 | "Cam Mic", "Mic", "Line" |
206 | }; |
207 | uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED; |
208 | uinfo->count = 1; |
209 | uinfo->value.enumerated.items = 3; |
210 | if (uinfo->value.enumerated.item >= 3) |
211 | uinfo->value.enumerated.item = 1; |
212 | strcpy(uinfo->value.enumerated.name, |
213 | texts[uinfo->value.enumerated.item]); |
214 | return 0; |
215 | } |
216 | |
217 | static int sgio2audio_source_get(struct snd_kcontrol *kcontrol, |
218 | struct snd_ctl_elem_value *ucontrol) |
219 | { |
220 | struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol); |
221 | |
222 | ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843); |
223 | return 0; |
224 | } |
225 | |
226 | static int sgio2audio_source_put(struct snd_kcontrol *kcontrol, |
227 | struct snd_ctl_elem_value *ucontrol) |
228 | { |
229 | struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol); |
230 | int newsrc, oldsrc; |
231 | |
232 | oldsrc = ad1843_get_recsrc(&chip->ad1843); |
233 | newsrc = ad1843_set_recsrc(&chip->ad1843, |
234 | ucontrol->value.enumerated.item[0]); |
235 | |
236 | return newsrc != oldsrc; |
237 | } |
238 | |
239 | /* dac1/pcm0 mixer control */ |
240 | static struct snd_kcontrol_new sgio2audio_ctrl_pcm0 __devinitdata = { |
241 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
242 | .name = "PCM Playback Volume", |
243 | .index = 0, |
244 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
245 | .private_value = AD1843_GAIN_PCM_0, |
246 | .info = sgio2audio_gain_info, |
247 | .get = sgio2audio_gain_get, |
248 | .put = sgio2audio_gain_put, |
249 | }; |
250 | |
251 | /* dac2/pcm1 mixer control */ |
252 | static struct snd_kcontrol_new sgio2audio_ctrl_pcm1 __devinitdata = { |
253 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
254 | .name = "PCM Playback Volume", |
255 | .index = 1, |
256 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
257 | .private_value = AD1843_GAIN_PCM_1, |
258 | .info = sgio2audio_gain_info, |
259 | .get = sgio2audio_gain_get, |
260 | .put = sgio2audio_gain_put, |
261 | }; |
262 | |
263 | /* record level mixer control */ |
264 | static struct snd_kcontrol_new sgio2audio_ctrl_reclevel __devinitdata = { |
265 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
266 | .name = "Capture Volume", |
267 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
268 | .private_value = AD1843_GAIN_RECLEV, |
269 | .info = sgio2audio_gain_info, |
270 | .get = sgio2audio_gain_get, |
271 | .put = sgio2audio_gain_put, |
272 | }; |
273 | |
274 | /* record level source control */ |
275 | static struct snd_kcontrol_new sgio2audio_ctrl_recsource __devinitdata = { |
276 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
277 | .name = "Capture Source", |
278 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
279 | .info = sgio2audio_source_info, |
280 | .get = sgio2audio_source_get, |
281 | .put = sgio2audio_source_put, |
282 | }; |
283 | |
284 | /* line mixer control */ |
285 | static struct snd_kcontrol_new sgio2audio_ctrl_line __devinitdata = { |
286 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
287 | .name = "Line Playback Volume", |
288 | .index = 0, |
289 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
290 | .private_value = AD1843_GAIN_LINE, |
291 | .info = sgio2audio_gain_info, |
292 | .get = sgio2audio_gain_get, |
293 | .put = sgio2audio_gain_put, |
294 | }; |
295 | |
296 | /* cd mixer control */ |
297 | static struct snd_kcontrol_new sgio2audio_ctrl_cd __devinitdata = { |
298 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
299 | .name = "Line Playback Volume", |
300 | .index = 1, |
301 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
302 | .private_value = AD1843_GAIN_LINE_2, |
303 | .info = sgio2audio_gain_info, |
304 | .get = sgio2audio_gain_get, |
305 | .put = sgio2audio_gain_put, |
306 | }; |
307 | |
308 | /* mic mixer control */ |
309 | static struct snd_kcontrol_new sgio2audio_ctrl_mic __devinitdata = { |
310 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
311 | .name = "Mic Playback Volume", |
312 | .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, |
313 | .private_value = AD1843_GAIN_MIC, |
314 | .info = sgio2audio_gain_info, |
315 | .get = sgio2audio_gain_get, |
316 | .put = sgio2audio_gain_put, |
317 | }; |
318 | |
319 | |
320 | static int __devinit snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip) |
321 | { |
322 | int err; |
323 | |
324 | err = snd_ctl_add(chip->card, |
325 | snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip)); |
326 | if (err < 0) |
327 | return err; |
328 | |
329 | err = snd_ctl_add(chip->card, |
330 | snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip)); |
331 | if (err < 0) |
332 | return err; |
333 | |
334 | err = snd_ctl_add(chip->card, |
335 | snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip)); |
336 | if (err < 0) |
337 | return err; |
338 | |
339 | err = snd_ctl_add(chip->card, |
340 | snd_ctl_new1(&sgio2audio_ctrl_recsource, chip)); |
341 | if (err < 0) |
342 | return err; |
343 | err = snd_ctl_add(chip->card, |
344 | snd_ctl_new1(&sgio2audio_ctrl_line, chip)); |
345 | if (err < 0) |
346 | return err; |
347 | |
348 | err = snd_ctl_add(chip->card, |
349 | snd_ctl_new1(&sgio2audio_ctrl_cd, chip)); |
350 | if (err < 0) |
351 | return err; |
352 | |
353 | err = snd_ctl_add(chip->card, |
354 | snd_ctl_new1(&sgio2audio_ctrl_mic, chip)); |
355 | if (err < 0) |
356 | return err; |
357 | |
358 | return 0; |
359 | } |
360 | |
361 | /* low-level audio interface DMA */ |
362 | |
363 | /* get data out of bounce buffer, count must be a multiple of 32 */ |
364 | /* returns 1 if a period has elapsed */ |
365 | static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip, |
366 | unsigned int ch, unsigned int count) |
367 | { |
368 | int ret; |
369 | unsigned long src_base, src_pos, dst_mask; |
370 | unsigned char *dst_base; |
371 | int dst_pos; |
372 | u64 *src; |
373 | s16 *dst; |
374 | u64 x; |
375 | unsigned long flags; |
376 | struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime; |
377 | |
378 | spin_lock_irqsave(&chip->channel[ch].lock, flags); |
379 | |
380 | src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT); |
381 | src_pos = readq(&mace->perif.audio.chan[ch].read_ptr); |
382 | dst_base = runtime->dma_area; |
383 | dst_pos = chip->channel[ch].pos; |
384 | dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1; |
385 | |
386 | /* check if a period has elapsed */ |
387 | chip->channel[ch].size += (count >> 3); /* in frames */ |
388 | ret = chip->channel[ch].size >= runtime->period_size; |
389 | chip->channel[ch].size %= runtime->period_size; |
390 | |
391 | while (count) { |
392 | src = (u64 *)(src_base + src_pos); |
393 | dst = (s16 *)(dst_base + dst_pos); |
394 | |
395 | x = *src; |
396 | dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff; |
397 | dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff; |
398 | |
399 | src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK; |
400 | dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask; |
401 | count -= sizeof(u64); |
402 | } |
403 | |
404 | writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */ |
405 | chip->channel[ch].pos = dst_pos; |
406 | |
407 | spin_unlock_irqrestore(&chip->channel[ch].lock, flags); |
408 | return ret; |
409 | } |
410 | |
411 | /* put some DMA data in bounce buffer, count must be a multiple of 32 */ |
412 | /* returns 1 if a period has elapsed */ |
413 | static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip, |
414 | unsigned int ch, unsigned int count) |
415 | { |
416 | int ret; |
417 | s64 l, r; |
418 | unsigned long dst_base, dst_pos, src_mask; |
419 | unsigned char *src_base; |
420 | int src_pos; |
421 | u64 *dst; |
422 | s16 *src; |
423 | unsigned long flags; |
424 | struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime; |
425 | |
426 | spin_lock_irqsave(&chip->channel[ch].lock, flags); |
427 | |
428 | dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT); |
429 | dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr); |
430 | src_base = runtime->dma_area; |
431 | src_pos = chip->channel[ch].pos; |
432 | src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1; |
433 | |
434 | /* check if a period has elapsed */ |
435 | chip->channel[ch].size += (count >> 3); /* in frames */ |
436 | ret = chip->channel[ch].size >= runtime->period_size; |
437 | chip->channel[ch].size %= runtime->period_size; |
438 | |
439 | while (count) { |
440 | src = (s16 *)(src_base + src_pos); |
441 | dst = (u64 *)(dst_base + dst_pos); |
442 | |
443 | l = src[0]; /* sign extend */ |
444 | r = src[1]; /* sign extend */ |
445 | |
446 | *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) | |
447 | ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT); |
448 | |
449 | dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK; |
450 | src_pos = (src_pos + 2 * sizeof(s16)) & src_mask; |
451 | count -= sizeof(u64); |
452 | } |
453 | |
454 | writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */ |
455 | chip->channel[ch].pos = src_pos; |
456 | |
457 | spin_unlock_irqrestore(&chip->channel[ch].lock, flags); |
458 | return ret; |
459 | } |
460 | |
461 | static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream) |
462 | { |
463 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
464 | struct snd_sgio2audio_chan *chan = substream->runtime->private_data; |
465 | int ch = chan->idx; |
466 | |
467 | /* reset DMA channel */ |
468 | writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control); |
469 | udelay(10); |
470 | writeq(0, &mace->perif.audio.chan[ch].control); |
471 | |
472 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
473 | /* push a full buffer */ |
474 | snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32); |
475 | } |
476 | /* set DMA to wake on 50% empty and enable interrupt */ |
477 | writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50, |
478 | &mace->perif.audio.chan[ch].control); |
479 | return 0; |
480 | } |
481 | |
482 | static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream) |
483 | { |
484 | struct snd_sgio2audio_chan *chan = substream->runtime->private_data; |
485 | |
486 | writeq(0, &mace->perif.audio.chan[chan->idx].control); |
487 | return 0; |
488 | } |
489 | |
490 | static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id) |
491 | { |
492 | struct snd_sgio2audio_chan *chan = dev_id; |
493 | struct snd_pcm_substream *substream; |
494 | struct snd_sgio2audio *chip; |
495 | int count, ch; |
496 | |
497 | substream = chan->substream; |
498 | chip = snd_pcm_substream_chip(substream); |
499 | ch = chan->idx; |
500 | |
501 | /* empty the ring */ |
502 | count = CHANNEL_RING_SIZE - |
503 | readq(&mace->perif.audio.chan[ch].depth) - 32; |
504 | if (snd_sgio2audio_dma_pull_frag(chip, ch, count)) |
505 | snd_pcm_period_elapsed(substream); |
506 | |
507 | return IRQ_HANDLED; |
508 | } |
509 | |
510 | static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id) |
511 | { |
512 | struct snd_sgio2audio_chan *chan = dev_id; |
513 | struct snd_pcm_substream *substream; |
514 | struct snd_sgio2audio *chip; |
515 | int count, ch; |
516 | |
517 | substream = chan->substream; |
518 | chip = snd_pcm_substream_chip(substream); |
519 | ch = chan->idx; |
520 | /* fill the ring */ |
521 | count = CHANNEL_RING_SIZE - |
522 | readq(&mace->perif.audio.chan[ch].depth) - 32; |
523 | if (snd_sgio2audio_dma_push_frag(chip, ch, count)) |
524 | snd_pcm_period_elapsed(substream); |
525 | |
526 | return IRQ_HANDLED; |
527 | } |
528 | |
529 | static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id) |
530 | { |
531 | struct snd_sgio2audio_chan *chan = dev_id; |
532 | struct snd_pcm_substream *substream; |
533 | |
534 | substream = chan->substream; |
535 | snd_sgio2audio_dma_stop(substream); |
536 | snd_sgio2audio_dma_start(substream); |
537 | return IRQ_HANDLED; |
538 | } |
539 | |
540 | /* PCM part */ |
541 | /* PCM hardware definition */ |
542 | static struct snd_pcm_hardware snd_sgio2audio_pcm_hw = { |
543 | .info = (SNDRV_PCM_INFO_MMAP | |
544 | SNDRV_PCM_INFO_MMAP_VALID | |
545 | SNDRV_PCM_INFO_INTERLEAVED | |
546 | SNDRV_PCM_INFO_BLOCK_TRANSFER), |
547 | .formats = SNDRV_PCM_FMTBIT_S16_BE, |
548 | .rates = SNDRV_PCM_RATE_8000_48000, |
549 | .rate_min = 8000, |
550 | .rate_max = 48000, |
551 | .channels_min = 2, |
552 | .channels_max = 2, |
553 | .buffer_bytes_max = 65536, |
554 | .period_bytes_min = 32768, |
555 | .period_bytes_max = 65536, |
556 | .periods_min = 1, |
557 | .periods_max = 1024, |
558 | }; |
559 | |
560 | /* PCM playback open callback */ |
561 | static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream) |
562 | { |
563 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
564 | struct snd_pcm_runtime *runtime = substream->runtime; |
565 | |
566 | runtime->hw = snd_sgio2audio_pcm_hw; |
567 | runtime->private_data = &chip->channel[1]; |
568 | return 0; |
569 | } |
570 | |
571 | static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream) |
572 | { |
573 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
574 | struct snd_pcm_runtime *runtime = substream->runtime; |
575 | |
576 | runtime->hw = snd_sgio2audio_pcm_hw; |
577 | runtime->private_data = &chip->channel[2]; |
578 | return 0; |
579 | } |
580 | |
581 | /* PCM capture open callback */ |
582 | static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream) |
583 | { |
584 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
585 | struct snd_pcm_runtime *runtime = substream->runtime; |
586 | |
587 | runtime->hw = snd_sgio2audio_pcm_hw; |
588 | runtime->private_data = &chip->channel[0]; |
589 | return 0; |
590 | } |
591 | |
592 | /* PCM close callback */ |
593 | static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream) |
594 | { |
595 | struct snd_pcm_runtime *runtime = substream->runtime; |
596 | |
597 | runtime->private_data = NULL; |
598 | return 0; |
599 | } |
600 | |
601 | |
602 | /* hw_params callback */ |
603 | static int snd_sgio2audio_pcm_hw_params(struct snd_pcm_substream *substream, |
604 | struct snd_pcm_hw_params *hw_params) |
605 | { |
606 | struct snd_pcm_runtime *runtime = substream->runtime; |
607 | int size = params_buffer_bytes(hw_params); |
608 | |
609 | /* alloc virtual 'dma' area */ |
610 | if (runtime->dma_area) |
611 | vfree(runtime->dma_area); |
612 | runtime->dma_area = vmalloc_user(size); |
613 | if (runtime->dma_area == NULL) |
614 | return -ENOMEM; |
615 | runtime->dma_bytes = size; |
616 | return 0; |
617 | } |
618 | |
619 | /* hw_free callback */ |
620 | static int snd_sgio2audio_pcm_hw_free(struct snd_pcm_substream *substream) |
621 | { |
622 | vfree(substream->runtime->dma_area); |
623 | substream->runtime->dma_area = NULL; |
624 | return 0; |
625 | } |
626 | |
627 | /* prepare callback */ |
628 | static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream) |
629 | { |
630 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
631 | struct snd_pcm_runtime *runtime = substream->runtime; |
632 | struct snd_sgio2audio_chan *chan = substream->runtime->private_data; |
633 | int ch = chan->idx; |
634 | unsigned long flags; |
635 | |
636 | spin_lock_irqsave(&chip->channel[ch].lock, flags); |
637 | |
638 | /* Setup the pseudo-dma transfer pointers. */ |
639 | chip->channel[ch].pos = 0; |
640 | chip->channel[ch].size = 0; |
641 | chip->channel[ch].substream = substream; |
642 | |
643 | /* set AD1843 format */ |
644 | /* hardware format is always S16_LE */ |
645 | switch (substream->stream) { |
646 | case SNDRV_PCM_STREAM_PLAYBACK: |
647 | ad1843_setup_dac(&chip->ad1843, |
648 | ch - 1, |
649 | runtime->rate, |
650 | SNDRV_PCM_FORMAT_S16_LE, |
651 | runtime->channels); |
652 | break; |
653 | case SNDRV_PCM_STREAM_CAPTURE: |
654 | ad1843_setup_adc(&chip->ad1843, |
655 | runtime->rate, |
656 | SNDRV_PCM_FORMAT_S16_LE, |
657 | runtime->channels); |
658 | break; |
659 | } |
660 | spin_unlock_irqrestore(&chip->channel[ch].lock, flags); |
661 | return 0; |
662 | } |
663 | |
664 | /* trigger callback */ |
665 | static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream, |
666 | int cmd) |
667 | { |
668 | switch (cmd) { |
669 | case SNDRV_PCM_TRIGGER_START: |
670 | /* start the PCM engine */ |
671 | snd_sgio2audio_dma_start(substream); |
672 | break; |
673 | case SNDRV_PCM_TRIGGER_STOP: |
674 | /* stop the PCM engine */ |
675 | snd_sgio2audio_dma_stop(substream); |
676 | break; |
677 | default: |
678 | return -EINVAL; |
679 | } |
680 | return 0; |
681 | } |
682 | |
683 | /* pointer callback */ |
684 | static snd_pcm_uframes_t |
685 | snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream) |
686 | { |
687 | struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream); |
688 | struct snd_sgio2audio_chan *chan = substream->runtime->private_data; |
689 | |
690 | /* get the current hardware pointer */ |
691 | return bytes_to_frames(substream->runtime, |
692 | chip->channel[chan->idx].pos); |
693 | } |
694 | |
695 | /* get the physical page pointer on the given offset */ |
696 | static struct page *snd_sgio2audio_page(struct snd_pcm_substream *substream, |
697 | unsigned long offset) |
698 | { |
699 | return vmalloc_to_page(substream->runtime->dma_area + offset); |
700 | } |
701 | |
702 | /* operators */ |
703 | static struct snd_pcm_ops snd_sgio2audio_playback1_ops = { |
704 | .open = snd_sgio2audio_playback1_open, |
705 | .close = snd_sgio2audio_pcm_close, |
706 | .ioctl = snd_pcm_lib_ioctl, |
707 | .hw_params = snd_sgio2audio_pcm_hw_params, |
708 | .hw_free = snd_sgio2audio_pcm_hw_free, |
709 | .prepare = snd_sgio2audio_pcm_prepare, |
710 | .trigger = snd_sgio2audio_pcm_trigger, |
711 | .pointer = snd_sgio2audio_pcm_pointer, |
712 | .page = snd_sgio2audio_page, |
713 | }; |
714 | |
715 | static struct snd_pcm_ops snd_sgio2audio_playback2_ops = { |
716 | .open = snd_sgio2audio_playback2_open, |
717 | .close = snd_sgio2audio_pcm_close, |
718 | .ioctl = snd_pcm_lib_ioctl, |
719 | .hw_params = snd_sgio2audio_pcm_hw_params, |
720 | .hw_free = snd_sgio2audio_pcm_hw_free, |
721 | .prepare = snd_sgio2audio_pcm_prepare, |
722 | .trigger = snd_sgio2audio_pcm_trigger, |
723 | .pointer = snd_sgio2audio_pcm_pointer, |
724 | .page = snd_sgio2audio_page, |
725 | }; |
726 | |
727 | static struct snd_pcm_ops snd_sgio2audio_capture_ops = { |
728 | .open = snd_sgio2audio_capture_open, |
729 | .close = snd_sgio2audio_pcm_close, |
730 | .ioctl = snd_pcm_lib_ioctl, |
731 | .hw_params = snd_sgio2audio_pcm_hw_params, |
732 | .hw_free = snd_sgio2audio_pcm_hw_free, |
733 | .prepare = snd_sgio2audio_pcm_prepare, |
734 | .trigger = snd_sgio2audio_pcm_trigger, |
735 | .pointer = snd_sgio2audio_pcm_pointer, |
736 | .page = snd_sgio2audio_page, |
737 | }; |
738 | |
739 | /* |
740 | * definitions of capture are omitted here... |
741 | */ |
742 | |
743 | /* create a pcm device */ |
744 | static int __devinit snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip) |
745 | { |
746 | struct snd_pcm *pcm; |
747 | int err; |
748 | |
749 | /* create first pcm device with one outputs and one input */ |
750 | err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm); |
751 | if (err < 0) |
752 | return err; |
753 | |
754 | pcm->private_data = chip; |
755 | strcpy(pcm->name, "SGI O2 DAC1"); |
756 | |
757 | /* set operators */ |
758 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
759 | &snd_sgio2audio_playback1_ops); |
760 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, |
761 | &snd_sgio2audio_capture_ops); |
762 | |
763 | /* create second pcm device with one outputs and no input */ |
764 | err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm); |
765 | if (err < 0) |
766 | return err; |
767 | |
768 | pcm->private_data = chip; |
769 | strcpy(pcm->name, "SGI O2 DAC2"); |
770 | |
771 | /* set operators */ |
772 | snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
773 | &snd_sgio2audio_playback2_ops); |
774 | |
775 | return 0; |
776 | } |
777 | |
778 | static struct { |
779 | int idx; |
780 | int irq; |
781 | irqreturn_t (*isr)(int, void *); |
782 | const char *desc; |
783 | } snd_sgio2_isr_table[] = { |
784 | { |
785 | .idx = 0, |
786 | .irq = MACEISA_AUDIO1_DMAT_IRQ, |
787 | .isr = snd_sgio2audio_dma_in_isr, |
788 | .desc = "Capture DMA Channel 0" |
789 | }, { |
790 | .idx = 0, |
791 | .irq = MACEISA_AUDIO1_OF_IRQ, |
792 | .isr = snd_sgio2audio_error_isr, |
793 | .desc = "Capture Overflow" |
794 | }, { |
795 | .idx = 1, |
796 | .irq = MACEISA_AUDIO2_DMAT_IRQ, |
797 | .isr = snd_sgio2audio_dma_out_isr, |
798 | .desc = "Playback DMA Channel 1" |
799 | }, { |
800 | .idx = 1, |
801 | .irq = MACEISA_AUDIO2_MERR_IRQ, |
802 | .isr = snd_sgio2audio_error_isr, |
803 | .desc = "Memory Error Channel 1" |
804 | }, { |
805 | .idx = 2, |
806 | .irq = MACEISA_AUDIO3_DMAT_IRQ, |
807 | .isr = snd_sgio2audio_dma_out_isr, |
808 | .desc = "Playback DMA Channel 2" |
809 | }, { |
810 | .idx = 2, |
811 | .irq = MACEISA_AUDIO3_MERR_IRQ, |
812 | .isr = snd_sgio2audio_error_isr, |
813 | .desc = "Memory Error Channel 2" |
814 | } |
815 | }; |
816 | |
817 | /* ALSA driver */ |
818 | |
819 | static int snd_sgio2audio_free(struct snd_sgio2audio *chip) |
820 | { |
821 | int i; |
822 | |
823 | /* reset interface */ |
824 | writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control); |
825 | udelay(1); |
826 | writeq(0, &mace->perif.audio.control); |
827 | |
828 | /* release IRQ's */ |
829 | for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) |
830 | free_irq(snd_sgio2_isr_table[i].irq, |
831 | &chip->channel[snd_sgio2_isr_table[i].idx]); |
832 | |
833 | dma_free_coherent(NULL, MACEISA_RINGBUFFERS_SIZE, |
834 | chip->ring_base, chip->ring_base_dma); |
835 | |
836 | /* release card data */ |
837 | kfree(chip); |
838 | return 0; |
839 | } |
840 | |
841 | static int snd_sgio2audio_dev_free(struct snd_device *device) |
842 | { |
843 | struct snd_sgio2audio *chip = device->device_data; |
844 | |
845 | return snd_sgio2audio_free(chip); |
846 | } |
847 | |
848 | static struct snd_device_ops ops = { |
849 | .dev_free = snd_sgio2audio_dev_free, |
850 | }; |
851 | |
852 | static int __devinit snd_sgio2audio_create(struct snd_card *card, |
853 | struct snd_sgio2audio **rchip) |
854 | { |
855 | struct snd_sgio2audio *chip; |
856 | int i, err; |
857 | |
858 | *rchip = NULL; |
859 | |
860 | /* check if a codec is attached to the interface */ |
861 | /* (Audio or Audio/Video board present) */ |
862 | if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT)) |
863 | return -ENOENT; |
864 | |
865 | chip = kzalloc(sizeof(struct snd_sgio2audio), GFP_KERNEL); |
866 | if (chip == NULL) |
867 | return -ENOMEM; |
868 | |
869 | chip->card = card; |
870 | |
871 | chip->ring_base = dma_alloc_coherent(NULL, MACEISA_RINGBUFFERS_SIZE, |
872 | &chip->ring_base_dma, GFP_USER); |
873 | if (chip->ring_base == NULL) { |
874 | printk(KERN_ERR |
875 | "sgio2audio: could not allocate ring buffers\n"); |
876 | kfree(chip); |
877 | return -ENOMEM; |
878 | } |
879 | |
880 | spin_lock_init(&chip->ad1843_lock); |
881 | |
882 | /* initialize channels */ |
883 | for (i = 0; i < 3; i++) { |
884 | spin_lock_init(&chip->channel[i].lock); |
885 | chip->channel[i].idx = i; |
886 | } |
887 | |
888 | /* allocate IRQs */ |
889 | for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) { |
890 | if (request_irq(snd_sgio2_isr_table[i].irq, |
891 | snd_sgio2_isr_table[i].isr, |
892 | 0, |
893 | snd_sgio2_isr_table[i].desc, |
894 | &chip->channel[snd_sgio2_isr_table[i].idx])) { |
895 | snd_sgio2audio_free(chip); |
896 | printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n", |
897 | snd_sgio2_isr_table[i].irq); |
898 | return -EBUSY; |
899 | } |
900 | } |
901 | |
902 | /* reset the interface */ |
903 | writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control); |
904 | udelay(1); |
905 | writeq(0, &mace->perif.audio.control); |
906 | msleep_interruptible(1); /* give time to recover */ |
907 | |
908 | /* set ring base */ |
909 | writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase); |
910 | |
911 | /* attach the AD1843 codec */ |
912 | chip->ad1843.read = read_ad1843_reg; |
913 | chip->ad1843.write = write_ad1843_reg; |
914 | chip->ad1843.chip = chip; |
915 | |
916 | /* initialize the AD1843 codec */ |
917 | err = ad1843_init(&chip->ad1843); |
918 | if (err < 0) { |
919 | snd_sgio2audio_free(chip); |
920 | return err; |
921 | } |
922 | |
923 | err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops); |
924 | if (err < 0) { |
925 | snd_sgio2audio_free(chip); |
926 | return err; |
927 | } |
928 | *rchip = chip; |
929 | return 0; |
930 | } |
931 | |
932 | static int __devinit snd_sgio2audio_probe(struct platform_device *pdev) |
933 | { |
934 | struct snd_card *card; |
935 | struct snd_sgio2audio *chip; |
936 | int err; |
937 | |
938 | err = snd_card_create(index, id, THIS_MODULE, 0, &card); |
939 | if (err < 0) |
940 | return err; |
941 | |
942 | err = snd_sgio2audio_create(card, &chip); |
943 | if (err < 0) { |
944 | snd_card_free(card); |
945 | return err; |
946 | } |
947 | snd_card_set_dev(card, &pdev->dev); |
948 | |
949 | err = snd_sgio2audio_new_pcm(chip); |
950 | if (err < 0) { |
951 | snd_card_free(card); |
952 | return err; |
953 | } |
954 | err = snd_sgio2audio_new_mixer(chip); |
955 | if (err < 0) { |
956 | snd_card_free(card); |
957 | return err; |
958 | } |
959 | |
960 | strcpy(card->driver, "SGI O2 Audio"); |
961 | strcpy(card->shortname, "SGI O2 Audio"); |
962 | sprintf(card->longname, "%s irq %i-%i", |
963 | card->shortname, |
964 | MACEISA_AUDIO1_DMAT_IRQ, |
965 | MACEISA_AUDIO3_MERR_IRQ); |
966 | |
967 | err = snd_card_register(card); |
968 | if (err < 0) { |
969 | snd_card_free(card); |
970 | return err; |
971 | } |
972 | platform_set_drvdata(pdev, card); |
973 | return 0; |
974 | } |
975 | |
976 | static int __devexit snd_sgio2audio_remove(struct platform_device *pdev) |
977 | { |
978 | struct snd_card *card = platform_get_drvdata(pdev); |
979 | |
980 | snd_card_free(card); |
981 | platform_set_drvdata(pdev, NULL); |
982 | return 0; |
983 | } |
984 | |
985 | static struct platform_driver sgio2audio_driver = { |
986 | .probe = snd_sgio2audio_probe, |
987 | .remove = __devexit_p(snd_sgio2audio_remove), |
988 | .driver = { |
989 | .name = "sgio2audio", |
990 | .owner = THIS_MODULE, |
991 | } |
992 | }; |
993 | |
994 | static int __init alsa_card_sgio2audio_init(void) |
995 | { |
996 | return platform_driver_register(&sgio2audio_driver); |
997 | } |
998 | |
999 | static void __exit alsa_card_sgio2audio_exit(void) |
1000 | { |
1001 | platform_driver_unregister(&sgio2audio_driver); |
1002 | } |
1003 | |
1004 | module_init(alsa_card_sgio2audio_init) |
1005 | module_exit(alsa_card_sgio2audio_exit) |
1006 |
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