ALSA: ALSA driver for SGI O2 audio board
[linux-2.6.git] / sound / mips / sgio2audio.c
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 J√§ndling <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(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         if (substream->runtime->dma_area)
623                 vfree(substream->runtime->dma_area);
624         substream->runtime->dma_area = NULL;
625         return 0;
626 }
627
628 /* prepare callback */
629 static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)
630 {
631         struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
632         struct snd_pcm_runtime *runtime = substream->runtime;
633         struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
634         int ch = chan->idx;
635         unsigned long flags;
636
637         spin_lock_irqsave(&chip->channel[ch].lock, flags);
638
639         /* Setup the pseudo-dma transfer pointers.  */
640         chip->channel[ch].pos = 0;
641         chip->channel[ch].size = 0;
642         chip->channel[ch].substream = substream;
643
644         /* set AD1843 format */
645         /* hardware format is always S16_LE */
646         switch (substream->stream) {
647         case SNDRV_PCM_STREAM_PLAYBACK:
648                 ad1843_setup_dac(&chip->ad1843,
649                                  ch - 1,
650                                  runtime->rate,
651                                  SNDRV_PCM_FORMAT_S16_LE,
652                                  runtime->channels);
653                 break;
654         case SNDRV_PCM_STREAM_CAPTURE:
655                 ad1843_setup_adc(&chip->ad1843,
656                                  runtime->rate,
657                                  SNDRV_PCM_FORMAT_S16_LE,
658                                  runtime->channels);
659                 break;
660         }
661         spin_unlock_irqrestore(&chip->channel[ch].lock, flags);
662         return 0;
663 }
664
665 /* trigger callback */
666 static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,
667                                       int cmd)
668 {
669         switch (cmd) {
670         case SNDRV_PCM_TRIGGER_START:
671                 /* start the PCM engine */
672                 snd_sgio2audio_dma_start(substream);
673                 break;
674         case SNDRV_PCM_TRIGGER_STOP:
675                 /* stop the PCM engine */
676                 snd_sgio2audio_dma_stop(substream);
677                 break;
678         default:
679                 return -EINVAL;
680         }
681         return 0;
682 }
683
684 /* pointer callback */
685 static snd_pcm_uframes_t
686 snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)
687 {
688         struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);
689         struct snd_sgio2audio_chan *chan = substream->runtime->private_data;
690
691         /* get the current hardware pointer */
692         return bytes_to_frames(substream->runtime,
693                                chip->channel[chan->idx].pos);
694 }
695
696 /* get the physical page pointer on the given offset */
697 static struct page *snd_sgio2audio_page(struct snd_pcm_substream *substream,
698                                         unsigned long offset)
699 {
700         return vmalloc_to_page(substream->runtime->dma_area + offset);
701 }
702
703 /* operators */
704 static struct snd_pcm_ops snd_sgio2audio_playback1_ops = {
705         .open =        snd_sgio2audio_playback1_open,
706         .close =       snd_sgio2audio_pcm_close,
707         .ioctl =       snd_pcm_lib_ioctl,
708         .hw_params =   snd_sgio2audio_pcm_hw_params,
709         .hw_free =     snd_sgio2audio_pcm_hw_free,
710         .prepare =     snd_sgio2audio_pcm_prepare,
711         .trigger =     snd_sgio2audio_pcm_trigger,
712         .pointer =     snd_sgio2audio_pcm_pointer,
713         .page =        snd_sgio2audio_page,
714 };
715
716 static struct snd_pcm_ops snd_sgio2audio_playback2_ops = {
717         .open =        snd_sgio2audio_playback2_open,
718         .close =       snd_sgio2audio_pcm_close,
719         .ioctl =       snd_pcm_lib_ioctl,
720         .hw_params =   snd_sgio2audio_pcm_hw_params,
721         .hw_free =     snd_sgio2audio_pcm_hw_free,
722         .prepare =     snd_sgio2audio_pcm_prepare,
723         .trigger =     snd_sgio2audio_pcm_trigger,
724         .pointer =     snd_sgio2audio_pcm_pointer,
725         .page =        snd_sgio2audio_page,
726 };
727
728 static struct snd_pcm_ops snd_sgio2audio_capture_ops = {
729         .open =        snd_sgio2audio_capture_open,
730         .close =       snd_sgio2audio_pcm_close,
731         .ioctl =       snd_pcm_lib_ioctl,
732         .hw_params =   snd_sgio2audio_pcm_hw_params,
733         .hw_free =     snd_sgio2audio_pcm_hw_free,
734         .prepare =     snd_sgio2audio_pcm_prepare,
735         .trigger =     snd_sgio2audio_pcm_trigger,
736         .pointer =     snd_sgio2audio_pcm_pointer,
737         .page =        snd_sgio2audio_page,
738 };
739
740 /*
741  *  definitions of capture are omitted here...
742  */
743
744 /* create a pcm device */
745 static int __devinit snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)
746 {
747         struct snd_pcm *pcm;
748         int err;
749
750         /* create first pcm device with one outputs and one input */
751         err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);
752         if (err < 0)
753                 return err;
754
755         pcm->private_data = chip;
756         strcpy(pcm->name, "SGI O2 DAC1");
757
758         /* set operators */
759         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
760                         &snd_sgio2audio_playback1_ops);
761         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
762                         &snd_sgio2audio_capture_ops);
763
764         /* create second  pcm device with one outputs and no input */
765         err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);
766         if (err < 0)
767                 return err;
768
769         pcm->private_data = chip;
770         strcpy(pcm->name, "SGI O2 DAC2");
771
772         /* set operators */
773         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
774                         &snd_sgio2audio_playback2_ops);
775
776         return 0;
777 }
778
779 static struct {
780         int idx;
781         int irq;
782         irqreturn_t (*isr)(int, void *);
783         const char *desc;
784 } snd_sgio2_isr_table[] = {
785         {
786                 .idx = 0,
787                 .irq = MACEISA_AUDIO1_DMAT_IRQ,
788                 .isr = snd_sgio2audio_dma_in_isr,
789                 .desc = "Capture DMA Channel 0"
790         }, {
791                 .idx = 0,
792                 .irq = MACEISA_AUDIO1_OF_IRQ,
793                 .isr = snd_sgio2audio_error_isr,
794                 .desc = "Capture Overflow"
795         }, {
796                 .idx = 1,
797                 .irq = MACEISA_AUDIO2_DMAT_IRQ,
798                 .isr = snd_sgio2audio_dma_out_isr,
799                 .desc = "Playback DMA Channel 1"
800         }, {
801                 .idx = 1,
802                 .irq = MACEISA_AUDIO2_MERR_IRQ,
803                 .isr = snd_sgio2audio_error_isr,
804                 .desc = "Memory Error Channel 1"
805         }, {
806                 .idx = 2,
807                 .irq = MACEISA_AUDIO3_DMAT_IRQ,
808                 .isr = snd_sgio2audio_dma_out_isr,
809                 .desc = "Playback DMA Channel 2"
810         }, {
811                 .idx = 2,
812                 .irq = MACEISA_AUDIO3_MERR_IRQ,
813                 .isr = snd_sgio2audio_error_isr,
814                 .desc = "Memory Error Channel 2"
815         }
816 };
817
818 /* ALSA driver */
819
820 static int snd_sgio2audio_free(struct snd_sgio2audio *chip)
821 {
822         int i;
823
824         /* reset interface */
825         writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
826         udelay(1);
827         writeq(0, &mace->perif.audio.control);
828
829         /* release IRQ's */
830         for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)
831                 free_irq(snd_sgio2_isr_table[i].irq,
832                          &chip->channel[snd_sgio2_isr_table[i].idx]);
833
834         dma_free_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
835                           chip->ring_base, chip->ring_base_dma);
836
837         /* release card data */
838         kfree(chip);
839         return 0;
840 }
841
842 static int snd_sgio2audio_dev_free(struct snd_device *device)
843 {
844         struct snd_sgio2audio *chip = device->device_data;
845
846         return snd_sgio2audio_free(chip);
847 }
848
849 static struct snd_device_ops ops = {
850         .dev_free = snd_sgio2audio_dev_free,
851 };
852
853 static int __devinit snd_sgio2audio_create(struct snd_card *card,
854                                            struct snd_sgio2audio **rchip)
855 {
856         struct snd_sgio2audio *chip;
857         int i, err;
858
859         *rchip = NULL;
860
861         /* check if a codec is attached to the interface */
862         /* (Audio or Audio/Video board present) */
863         if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))
864                 return -ENOENT;
865
866         chip = kzalloc(sizeof(struct snd_sgio2audio), GFP_KERNEL);
867         if (chip == NULL)
868                 return -ENOMEM;
869
870         chip->card = card;
871
872         chip->ring_base = dma_alloc_coherent(NULL, MACEISA_RINGBUFFERS_SIZE,
873                                              &chip->ring_base_dma, GFP_USER);
874         if (chip->ring_base == NULL) {
875                 printk(KERN_ERR
876                        "sgio2audio: could not allocate ring buffers\n");
877                 kfree(chip);
878                 return -ENOMEM;
879         }
880
881         spin_lock_init(&chip->ad1843_lock);
882
883         /* initialize channels */
884         for (i = 0; i < 3; i++) {
885                 spin_lock_init(&chip->channel[i].lock);
886                 chip->channel[i].idx = i;
887         }
888
889         /* allocate IRQs */
890         for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {
891                 if (request_irq(snd_sgio2_isr_table[i].irq,
892                                 snd_sgio2_isr_table[i].isr,
893                                 0,
894                                 snd_sgio2_isr_table[i].desc,
895                                 &chip->channel[snd_sgio2_isr_table[i].idx])) {
896                         snd_sgio2audio_free(chip);
897                         printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",
898                                snd_sgio2_isr_table[i].irq);
899                         return -EBUSY;
900                 }
901         }
902
903         /* reset the interface */
904         writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);
905         udelay(1);
906         writeq(0, &mace->perif.audio.control);
907         msleep_interruptible(1); /* give time to recover */
908
909         /* set ring base */
910         writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);
911
912         /* attach the AD1843 codec */
913         chip->ad1843.read = read_ad1843_reg;
914         chip->ad1843.write = write_ad1843_reg;
915         chip->ad1843.chip = chip;
916
917         /* initialize the AD1843 codec */
918         err = ad1843_init(&chip->ad1843);
919         if (err < 0) {
920                 snd_sgio2audio_free(chip);
921                 return err;
922         }
923
924         err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
925         if (err < 0) {
926                 snd_sgio2audio_free(chip);
927                 return err;
928         }
929         *rchip = chip;
930         return 0;
931 }
932
933 static int __devinit snd_sgio2audio_probe(struct platform_device *pdev)
934 {
935         struct snd_card *card;
936         struct snd_sgio2audio *chip;
937         int err;
938
939         card = snd_card_new(index, id, THIS_MODULE, 0);
940         if (card == NULL)
941                 return -ENOMEM;
942
943         err = snd_sgio2audio_create(card, &chip);
944         if (err < 0) {
945                 snd_card_free(card);
946                 return err;
947         }
948         snd_card_set_dev(card, &pdev->dev);
949
950         err = snd_sgio2audio_new_pcm(chip);
951         if (err < 0) {
952                 snd_card_free(card);
953                 return err;
954         }
955         err = snd_sgio2audio_new_mixer(chip);
956         if (err < 0) {
957                 snd_card_free(card);
958                 return err;
959         }
960
961         strcpy(card->driver, "SGI O2 Audio");
962         strcpy(card->shortname, "SGI O2 Audio");
963         sprintf(card->longname, "%s irq %i-%i",
964                 card->shortname,
965                 MACEISA_AUDIO1_DMAT_IRQ,
966                 MACEISA_AUDIO3_MERR_IRQ);
967
968         err = snd_card_register(card);
969         if (err < 0) {
970                 snd_card_free(card);
971                 return err;
972         }
973         platform_set_drvdata(pdev, card);
974         return 0;
975 }
976
977 static int __exit snd_sgio2audio_remove(struct platform_device *pdev)
978 {
979         struct snd_card *card = platform_get_drvdata(pdev);
980
981         snd_card_free(card);
982         platform_set_drvdata(pdev, NULL);
983         return 0;
984 }
985
986 static struct platform_driver sgio2audio_driver = {
987         .probe  = snd_sgio2audio_probe,
988         .remove = __devexit_p(snd_sgio2audio_remove),
989         .driver = {
990                 .name   = "sgio2audio",
991                 .owner  = THIS_MODULE,
992         }
993 };
994
995 static int __init alsa_card_sgio2audio_init(void)
996 {
997         return platform_driver_register(&sgio2audio_driver);
998 }
999
1000 static void __exit alsa_card_sgio2audio_exit(void)
1001 {
1002         platform_driver_unregister(&sgio2audio_driver);
1003 }
1004
1005 module_init(alsa_card_sgio2audio_init)
1006 module_exit(alsa_card_sgio2audio_exit)