asoc: codecs: spdif: Add support for setting bias level
[linux-2.6.git] / sound / parisc / harmony.c
1 /* Hewlett-Packard Harmony audio driver
2  *
3  *   This is a driver for the Harmony audio chipset found
4  *   on the LASI ASIC of various early HP PA-RISC workstations.
5  *
6  *   Copyright (C) 2004, Kyle McMartin <kyle@{debian.org,parisc-linux.org}>
7  *
8  *     Based on the previous Harmony incarnations by,
9  *       Copyright 2000 (c) Linuxcare Canada, Alex deVries
10  *       Copyright 2000-2003 (c) Helge Deller
11  *       Copyright 2001 (c) Matthieu Delahaye
12  *       Copyright 2001 (c) Jean-Christophe Vaugeois
13  *       Copyright 2003 (c) Laurent Canet
14  *       Copyright 2004 (c) Stuart Brady
15  *
16  *   This program is free software; you can redistribute it and/or modify
17  *   it under the terms of the GNU General Public License, version 2, as
18  *   published by the Free Software Foundation.
19  *
20  *   This program is distributed in the hope that it will be useful,
21  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
22  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23  *   GNU General Public License for more details.
24  *
25  *   You should have received a copy of the GNU General Public License
26  *   along with this program; if not, write to the Free Software
27  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
28  *
29  * Notes:
30  *   - graveyard and silence buffers last for lifetime of
31  *     the driver. playback and capture buffers are allocated
32  *     per _open()/_close().
33  * 
34  * TODO:
35  *
36  */
37
38 #include <linux/init.h>
39 #include <linux/slab.h>
40 #include <linux/time.h>
41 #include <linux/wait.h>
42 #include <linux/delay.h>
43 #include <linux/module.h>
44 #include <linux/interrupt.h>
45 #include <linux/spinlock.h>
46 #include <linux/dma-mapping.h>
47
48 #include <sound/core.h>
49 #include <sound/pcm.h>
50 #include <sound/control.h>
51 #include <sound/rawmidi.h>
52 #include <sound/initval.h>
53 #include <sound/info.h>
54
55 #include <asm/io.h>
56 #include <asm/hardware.h>
57 #include <asm/parisc-device.h>
58
59 #include "harmony.h"
60
61 static int index = SNDRV_DEFAULT_IDX1;  /* Index 0-MAX */
62 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
63 module_param(index, int, 0444);
64 MODULE_PARM_DESC(index, "Index value for Harmony driver.");
65 module_param(id, charp, 0444);
66 MODULE_PARM_DESC(id, "ID string for Harmony driver.");
67
68
69 static struct parisc_device_id snd_harmony_devtable[] = {
70         /* bushmaster / flounder */
71         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007A }, 
72         /* 712 / 715 */
73         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007B }, 
74         /* pace */
75         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007E }, 
76         /* outfield / coral II */
77         { HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x0007F },
78         { 0, }
79 };
80
81 MODULE_DEVICE_TABLE(parisc, snd_harmony_devtable);
82
83 #define NAME "harmony"
84 #define PFX  NAME ": "
85
86 static unsigned int snd_harmony_rates[] = {
87         5512, 6615, 8000, 9600,
88         11025, 16000, 18900, 22050,
89         27428, 32000, 33075, 37800,
90         44100, 48000
91 };
92
93 static unsigned int rate_bits[14] = {
94         HARMONY_SR_5KHZ, HARMONY_SR_6KHZ, HARMONY_SR_8KHZ,
95         HARMONY_SR_9KHZ, HARMONY_SR_11KHZ, HARMONY_SR_16KHZ,
96         HARMONY_SR_18KHZ, HARMONY_SR_22KHZ, HARMONY_SR_27KHZ,
97         HARMONY_SR_32KHZ, HARMONY_SR_33KHZ, HARMONY_SR_37KHZ,
98         HARMONY_SR_44KHZ, HARMONY_SR_48KHZ
99 };
100
101 static struct snd_pcm_hw_constraint_list hw_constraint_rates = {
102         .count = ARRAY_SIZE(snd_harmony_rates),
103         .list = snd_harmony_rates,
104         .mask = 0,
105 };
106
107 static inline unsigned long
108 harmony_read(struct snd_harmony *h, unsigned r)
109 {
110         return __raw_readl(h->iobase + r);
111 }
112
113 static inline void
114 harmony_write(struct snd_harmony *h, unsigned r, unsigned long v)
115 {
116         __raw_writel(v, h->iobase + r);
117 }
118
119 static inline void
120 harmony_wait_for_control(struct snd_harmony *h)
121 {
122         while (harmony_read(h, HARMONY_CNTL) & HARMONY_CNTL_C) ;
123 }
124
125 static inline void
126 harmony_reset(struct snd_harmony *h)
127 {
128         harmony_write(h, HARMONY_RESET, 1);
129         mdelay(50);
130         harmony_write(h, HARMONY_RESET, 0);
131 }
132
133 static void
134 harmony_disable_interrupts(struct snd_harmony *h)
135 {
136         u32 dstatus;
137         harmony_wait_for_control(h);
138         dstatus = harmony_read(h, HARMONY_DSTATUS);
139         dstatus &= ~HARMONY_DSTATUS_IE;
140         harmony_write(h, HARMONY_DSTATUS, dstatus);
141 }
142
143 static void
144 harmony_enable_interrupts(struct snd_harmony *h)
145 {
146         u32 dstatus;
147         harmony_wait_for_control(h);
148         dstatus = harmony_read(h, HARMONY_DSTATUS);
149         dstatus |= HARMONY_DSTATUS_IE;
150         harmony_write(h, HARMONY_DSTATUS, dstatus);
151 }
152
153 static void
154 harmony_mute(struct snd_harmony *h)
155 {
156         unsigned long flags;
157
158         spin_lock_irqsave(&h->mixer_lock, flags);
159         harmony_wait_for_control(h);
160         harmony_write(h, HARMONY_GAINCTL, HARMONY_GAIN_SILENCE);
161         spin_unlock_irqrestore(&h->mixer_lock, flags);
162 }
163
164 static void
165 harmony_unmute(struct snd_harmony *h)
166 {
167         unsigned long flags;
168
169         spin_lock_irqsave(&h->mixer_lock, flags);
170         harmony_wait_for_control(h);
171         harmony_write(h, HARMONY_GAINCTL, h->st.gain);
172         spin_unlock_irqrestore(&h->mixer_lock, flags);
173 }
174
175 static void
176 harmony_set_control(struct snd_harmony *h)
177 {
178         u32 ctrl;
179         unsigned long flags;
180
181         spin_lock_irqsave(&h->lock, flags);
182
183         ctrl = (HARMONY_CNTL_C      |
184                 (h->st.format << 6) |
185                 (h->st.stereo << 5) |
186                 (h->st.rate));
187
188         harmony_wait_for_control(h);
189         harmony_write(h, HARMONY_CNTL, ctrl);
190
191         spin_unlock_irqrestore(&h->lock, flags);
192 }
193
194 static irqreturn_t
195 snd_harmony_interrupt(int irq, void *dev)
196 {
197         u32 dstatus;
198         struct snd_harmony *h = dev;
199
200         spin_lock(&h->lock);
201         harmony_disable_interrupts(h);
202         harmony_wait_for_control(h);
203         dstatus = harmony_read(h, HARMONY_DSTATUS);
204         spin_unlock(&h->lock);
205
206         if (dstatus & HARMONY_DSTATUS_PN) {
207                 if (h->psubs && h->st.playing) {
208                         spin_lock(&h->lock);
209                         h->pbuf.buf += h->pbuf.count; /* PAGE_SIZE */
210                         h->pbuf.buf %= h->pbuf.size; /* MAX_BUFS*PAGE_SIZE */
211
212                         harmony_write(h, HARMONY_PNXTADD, 
213                                       h->pbuf.addr + h->pbuf.buf);
214                         h->stats.play_intr++;
215                         spin_unlock(&h->lock);
216                         snd_pcm_period_elapsed(h->psubs);
217                 } else {
218                         spin_lock(&h->lock);
219                         harmony_write(h, HARMONY_PNXTADD, h->sdma.addr);
220                         h->stats.silence_intr++;
221                         spin_unlock(&h->lock);
222                 }
223         }
224
225         if (dstatus & HARMONY_DSTATUS_RN) {
226                 if (h->csubs && h->st.capturing) {
227                         spin_lock(&h->lock);
228                         h->cbuf.buf += h->cbuf.count;
229                         h->cbuf.buf %= h->cbuf.size;
230
231                         harmony_write(h, HARMONY_RNXTADD,
232                                       h->cbuf.addr + h->cbuf.buf);
233                         h->stats.rec_intr++;
234                         spin_unlock(&h->lock);
235                         snd_pcm_period_elapsed(h->csubs);
236                 } else {
237                         spin_lock(&h->lock);
238                         harmony_write(h, HARMONY_RNXTADD, h->gdma.addr);
239                         h->stats.graveyard_intr++;
240                         spin_unlock(&h->lock);
241                 }
242         }
243
244         spin_lock(&h->lock);
245         harmony_enable_interrupts(h);
246         spin_unlock(&h->lock);
247
248         return IRQ_HANDLED;
249 }
250
251 static unsigned int 
252 snd_harmony_rate_bits(int rate)
253 {
254         unsigned int i;
255         
256         for (i = 0; i < ARRAY_SIZE(snd_harmony_rates); i++)
257                 if (snd_harmony_rates[i] == rate)
258                         return rate_bits[i];
259
260         return HARMONY_SR_44KHZ;
261 }
262
263 static struct snd_pcm_hardware snd_harmony_playback =
264 {
265         .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 
266                  SNDRV_PCM_INFO_JOINT_DUPLEX | SNDRV_PCM_INFO_MMAP_VALID |
267                  SNDRV_PCM_INFO_BLOCK_TRANSFER),
268         .formats = (SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_MU_LAW |
269                     SNDRV_PCM_FMTBIT_A_LAW),
270         .rates = (SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_48000 |
271                   SNDRV_PCM_RATE_KNOT),
272         .rate_min = 5512,
273         .rate_max = 48000,
274         .channels_min = 1,
275         .channels_max = 2,
276         .buffer_bytes_max = MAX_BUF_SIZE,
277         .period_bytes_min = BUF_SIZE,
278         .period_bytes_max = BUF_SIZE,
279         .periods_min = 1,
280         .periods_max = MAX_BUFS,
281         .fifo_size = 0,
282 };
283
284 static struct snd_pcm_hardware snd_harmony_capture =
285 {
286         .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
287                  SNDRV_PCM_INFO_JOINT_DUPLEX | SNDRV_PCM_INFO_MMAP_VALID |
288                  SNDRV_PCM_INFO_BLOCK_TRANSFER),
289         .formats = (SNDRV_PCM_FMTBIT_S16_BE | SNDRV_PCM_FMTBIT_MU_LAW |
290                     SNDRV_PCM_FMTBIT_A_LAW),
291         .rates = (SNDRV_PCM_RATE_5512 | SNDRV_PCM_RATE_8000_48000 |
292                   SNDRV_PCM_RATE_KNOT),
293         .rate_min = 5512,
294         .rate_max = 48000,
295         .channels_min = 1,
296         .channels_max = 2,
297         .buffer_bytes_max = MAX_BUF_SIZE,
298         .period_bytes_min = BUF_SIZE,
299         .period_bytes_max = BUF_SIZE,
300         .periods_min = 1,
301         .periods_max = MAX_BUFS,
302         .fifo_size = 0,
303 };
304
305 static int
306 snd_harmony_playback_trigger(struct snd_pcm_substream *ss, int cmd)
307 {
308         struct snd_harmony *h = snd_pcm_substream_chip(ss);
309
310         if (h->st.capturing)
311                 return -EBUSY;
312
313         spin_lock(&h->lock);
314         switch (cmd) {
315         case SNDRV_PCM_TRIGGER_START:
316                 h->st.playing = 1;
317                 harmony_write(h, HARMONY_PNXTADD, h->pbuf.addr);
318                 harmony_write(h, HARMONY_RNXTADD, h->gdma.addr);
319                 harmony_unmute(h);
320                 harmony_enable_interrupts(h);
321                 break;
322         case SNDRV_PCM_TRIGGER_STOP:
323                 h->st.playing = 0;
324                 harmony_mute(h);
325                 harmony_write(h, HARMONY_PNXTADD, h->sdma.addr);
326                 harmony_disable_interrupts(h);
327                 break;
328         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
329         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
330         case SNDRV_PCM_TRIGGER_SUSPEND:
331         default:
332                 spin_unlock(&h->lock);
333                 snd_BUG();
334                 return -EINVAL;
335         }
336         spin_unlock(&h->lock);
337         
338         return 0;
339 }
340
341 static int
342 snd_harmony_capture_trigger(struct snd_pcm_substream *ss, int cmd)
343 {
344         struct snd_harmony *h = snd_pcm_substream_chip(ss);
345
346         if (h->st.playing)
347                 return -EBUSY;
348
349         spin_lock(&h->lock);
350         switch (cmd) {
351         case SNDRV_PCM_TRIGGER_START:
352                 h->st.capturing = 1;
353                 harmony_write(h, HARMONY_PNXTADD, h->sdma.addr);
354                 harmony_write(h, HARMONY_RNXTADD, h->cbuf.addr);
355                 harmony_unmute(h);
356                 harmony_enable_interrupts(h);
357                 break;
358         case SNDRV_PCM_TRIGGER_STOP:
359                 h->st.capturing = 0;
360                 harmony_mute(h);
361                 harmony_write(h, HARMONY_RNXTADD, h->gdma.addr);
362                 harmony_disable_interrupts(h);
363                 break;
364         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
365         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
366         case SNDRV_PCM_TRIGGER_SUSPEND:
367         default:
368                 spin_unlock(&h->lock);
369                 snd_BUG();
370                 return -EINVAL;
371         }
372         spin_unlock(&h->lock);
373                 
374         return 0;
375 }
376
377 static int
378 snd_harmony_set_data_format(struct snd_harmony *h, int fmt, int force)
379 {
380         int o = h->st.format;
381         int n;
382
383         switch(fmt) {
384         case SNDRV_PCM_FORMAT_S16_BE:
385                 n = HARMONY_DF_16BIT_LINEAR;
386                 break;
387         case SNDRV_PCM_FORMAT_A_LAW:
388                 n = HARMONY_DF_8BIT_ALAW;
389                 break;
390         case SNDRV_PCM_FORMAT_MU_LAW:
391                 n = HARMONY_DF_8BIT_ULAW;
392                 break;
393         default:
394                 n = HARMONY_DF_16BIT_LINEAR;
395                 break;
396         }
397
398         if (force || o != n) {
399                 snd_pcm_format_set_silence(fmt, h->sdma.area, SILENCE_BUFSZ / 
400                                            (snd_pcm_format_physical_width(fmt)
401                                             / 8));
402         }
403
404         return n;
405 }
406
407 static int
408 snd_harmony_playback_prepare(struct snd_pcm_substream *ss)
409 {
410         struct snd_harmony *h = snd_pcm_substream_chip(ss);
411         struct snd_pcm_runtime *rt = ss->runtime;
412         
413         if (h->st.capturing)
414                 return -EBUSY;
415         
416         h->pbuf.size = snd_pcm_lib_buffer_bytes(ss);
417         h->pbuf.count = snd_pcm_lib_period_bytes(ss);
418         if (h->pbuf.buf >= h->pbuf.size)
419                 h->pbuf.buf = 0;
420         h->st.playing = 0;
421
422         h->st.rate = snd_harmony_rate_bits(rt->rate);
423         h->st.format = snd_harmony_set_data_format(h, rt->format, 0);
424         
425         if (rt->channels == 2)
426                 h->st.stereo = HARMONY_SS_STEREO;
427         else
428                 h->st.stereo = HARMONY_SS_MONO;
429
430         harmony_set_control(h);
431
432         h->pbuf.addr = rt->dma_addr;
433
434         return 0;
435 }
436
437 static int
438 snd_harmony_capture_prepare(struct snd_pcm_substream *ss)
439 {
440         struct snd_harmony *h = snd_pcm_substream_chip(ss);
441         struct snd_pcm_runtime *rt = ss->runtime;
442
443         if (h->st.playing)
444                 return -EBUSY;
445
446         h->cbuf.size = snd_pcm_lib_buffer_bytes(ss);
447         h->cbuf.count = snd_pcm_lib_period_bytes(ss);
448         if (h->cbuf.buf >= h->cbuf.size)
449                 h->cbuf.buf = 0;
450         h->st.capturing = 0;
451
452         h->st.rate = snd_harmony_rate_bits(rt->rate);
453         h->st.format = snd_harmony_set_data_format(h, rt->format, 0);
454
455         if (rt->channels == 2)
456                 h->st.stereo = HARMONY_SS_STEREO;
457         else
458                 h->st.stereo = HARMONY_SS_MONO;
459
460         harmony_set_control(h);
461
462         h->cbuf.addr = rt->dma_addr;
463
464         return 0;
465 }
466
467 static snd_pcm_uframes_t 
468 snd_harmony_playback_pointer(struct snd_pcm_substream *ss)
469 {
470         struct snd_pcm_runtime *rt = ss->runtime;
471         struct snd_harmony *h = snd_pcm_substream_chip(ss);
472         unsigned long pcuradd;
473         unsigned long played;
474
475         if (!(h->st.playing) || (h->psubs == NULL)) 
476                 return 0;
477
478         if ((h->pbuf.addr == 0) || (h->pbuf.size == 0))
479                 return 0;
480         
481         pcuradd = harmony_read(h, HARMONY_PCURADD);
482         played = pcuradd - h->pbuf.addr;
483
484 #ifdef HARMONY_DEBUG
485         printk(KERN_DEBUG PFX "playback_pointer is 0x%lx-0x%lx = %d bytes\n", 
486                pcuradd, h->pbuf.addr, played);  
487 #endif
488
489         if (pcuradd > h->pbuf.addr + h->pbuf.size) {
490                 return 0;
491         }
492
493         return bytes_to_frames(rt, played);
494 }
495
496 static snd_pcm_uframes_t
497 snd_harmony_capture_pointer(struct snd_pcm_substream *ss)
498 {
499         struct snd_pcm_runtime *rt = ss->runtime;
500         struct snd_harmony *h = snd_pcm_substream_chip(ss);
501         unsigned long rcuradd;
502         unsigned long caught;
503
504         if (!(h->st.capturing) || (h->csubs == NULL))
505                 return 0;
506
507         if ((h->cbuf.addr == 0) || (h->cbuf.size == 0))
508                 return 0;
509
510         rcuradd = harmony_read(h, HARMONY_RCURADD);
511         caught = rcuradd - h->cbuf.addr;
512
513 #ifdef HARMONY_DEBUG
514         printk(KERN_DEBUG PFX "capture_pointer is 0x%lx-0x%lx = %d bytes\n",
515                rcuradd, h->cbuf.addr, caught);
516 #endif
517
518         if (rcuradd > h->cbuf.addr + h->cbuf.size) {
519                 return 0;
520         }
521
522         return bytes_to_frames(rt, caught);
523 }
524
525 static int 
526 snd_harmony_playback_open(struct snd_pcm_substream *ss)
527 {
528         struct snd_harmony *h = snd_pcm_substream_chip(ss);
529         struct snd_pcm_runtime *rt = ss->runtime;
530         int err;
531         
532         h->psubs = ss;
533         rt->hw = snd_harmony_playback;
534         snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_RATE, 
535                                    &hw_constraint_rates);
536         
537         err = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
538         if (err < 0)
539                 return err;
540         
541         return 0;
542 }
543
544 static int
545 snd_harmony_capture_open(struct snd_pcm_substream *ss)
546 {
547         struct snd_harmony *h = snd_pcm_substream_chip(ss);
548         struct snd_pcm_runtime *rt = ss->runtime;
549         int err;
550
551         h->csubs = ss;
552         rt->hw = snd_harmony_capture;
553         snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_RATE,
554                                    &hw_constraint_rates);
555
556         err = snd_pcm_hw_constraint_integer(rt, SNDRV_PCM_HW_PARAM_PERIODS);
557         if (err < 0)
558                 return err;
559
560         return 0;
561 }
562
563 static int 
564 snd_harmony_playback_close(struct snd_pcm_substream *ss)
565 {
566         struct snd_harmony *h = snd_pcm_substream_chip(ss);
567         h->psubs = NULL;
568         return 0;
569 }
570
571 static int
572 snd_harmony_capture_close(struct snd_pcm_substream *ss)
573 {
574         struct snd_harmony *h = snd_pcm_substream_chip(ss);
575         h->csubs = NULL;
576         return 0;
577 }
578
579 static int 
580 snd_harmony_hw_params(struct snd_pcm_substream *ss,
581                       struct snd_pcm_hw_params *hw)
582 {
583         int err;
584         struct snd_harmony *h = snd_pcm_substream_chip(ss);
585         
586         err = snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw));
587         if (err > 0 && h->dma.type == SNDRV_DMA_TYPE_CONTINUOUS)
588                 ss->runtime->dma_addr = __pa(ss->runtime->dma_area);
589         
590         return err;
591 }
592
593 static int 
594 snd_harmony_hw_free(struct snd_pcm_substream *ss) 
595 {
596         return snd_pcm_lib_free_pages(ss);
597 }
598
599 static struct snd_pcm_ops snd_harmony_playback_ops = {
600         .open = snd_harmony_playback_open,
601         .close = snd_harmony_playback_close,
602         .ioctl = snd_pcm_lib_ioctl,
603         .hw_params = snd_harmony_hw_params,
604         .hw_free = snd_harmony_hw_free,
605         .prepare = snd_harmony_playback_prepare,
606         .trigger = snd_harmony_playback_trigger,
607         .pointer = snd_harmony_playback_pointer,
608 };
609
610 static struct snd_pcm_ops snd_harmony_capture_ops = {
611         .open = snd_harmony_capture_open,
612         .close = snd_harmony_capture_close,
613         .ioctl = snd_pcm_lib_ioctl,
614         .hw_params = snd_harmony_hw_params,
615         .hw_free = snd_harmony_hw_free,
616         .prepare = snd_harmony_capture_prepare,
617         .trigger = snd_harmony_capture_trigger,
618         .pointer = snd_harmony_capture_pointer,
619 };
620
621 static int 
622 snd_harmony_pcm_init(struct snd_harmony *h)
623 {
624         struct snd_pcm *pcm;
625         int err;
626
627         if (snd_BUG_ON(!h))
628                 return -EINVAL;
629
630         harmony_disable_interrupts(h);
631         
632         err = snd_pcm_new(h->card, "harmony", 0, 1, 1, &pcm);
633         if (err < 0)
634                 return err;
635         
636         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 
637                         &snd_harmony_playback_ops);
638         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
639                         &snd_harmony_capture_ops);
640
641         pcm->private_data = h;
642         pcm->info_flags = 0;
643         strcpy(pcm->name, "harmony");
644         h->pcm = pcm;
645
646         h->psubs = NULL;
647         h->csubs = NULL;
648         
649         /* initialize graveyard buffer */
650         h->dma.type = SNDRV_DMA_TYPE_DEV;
651         h->dma.dev = &h->dev->dev;
652         err = snd_dma_alloc_pages(h->dma.type,
653                                   h->dma.dev,
654                                   BUF_SIZE*GRAVEYARD_BUFS,
655                                   &h->gdma);
656         if (err < 0) {
657                 printk(KERN_ERR PFX "cannot allocate graveyard buffer!\n");
658                 return err;
659         }
660         
661         /* initialize silence buffers */
662         err = snd_dma_alloc_pages(h->dma.type,
663                                   h->dma.dev,
664                                   BUF_SIZE*SILENCE_BUFS,
665                                   &h->sdma);
666         if (err < 0) {
667                 printk(KERN_ERR PFX "cannot allocate silence buffer!\n");
668                 return err;
669         }
670
671         /* pre-allocate space for DMA */
672         err = snd_pcm_lib_preallocate_pages_for_all(pcm, h->dma.type,
673                                                     h->dma.dev,
674                                                     MAX_BUF_SIZE, 
675                                                     MAX_BUF_SIZE);
676         if (err < 0) {
677                 printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
678                 return err;
679         }
680
681         h->st.format = snd_harmony_set_data_format(h,
682                 SNDRV_PCM_FORMAT_S16_BE, 1);
683
684         return 0;
685 }
686
687 static void 
688 snd_harmony_set_new_gain(struct snd_harmony *h)
689 {
690         harmony_wait_for_control(h);
691         harmony_write(h, HARMONY_GAINCTL, h->st.gain);
692 }
693
694 static int 
695 snd_harmony_mixercontrol_info(struct snd_kcontrol *kc, 
696                               struct snd_ctl_elem_info *uinfo)
697 {
698         int mask = (kc->private_value >> 16) & 0xff;
699         int left_shift = (kc->private_value) & 0xff;
700         int right_shift = (kc->private_value >> 8) & 0xff;
701         
702         uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : 
703                        SNDRV_CTL_ELEM_TYPE_INTEGER;
704         uinfo->count = left_shift == right_shift ? 1 : 2;
705         uinfo->value.integer.min = 0;
706         uinfo->value.integer.max = mask;
707
708         return 0;
709 }
710
711 static int 
712 snd_harmony_volume_get(struct snd_kcontrol *kc, 
713                        struct snd_ctl_elem_value *ucontrol)
714 {
715         struct snd_harmony *h = snd_kcontrol_chip(kc);
716         int shift_left = (kc->private_value) & 0xff;
717         int shift_right = (kc->private_value >> 8) & 0xff;
718         int mask = (kc->private_value >> 16) & 0xff;
719         int invert = (kc->private_value >> 24) & 0xff;
720         int left, right;
721         
722         spin_lock_irq(&h->mixer_lock);
723
724         left = (h->st.gain >> shift_left) & mask;
725         right = (h->st.gain >> shift_right) & mask;
726         if (invert) {
727                 left = mask - left;
728                 right = mask - right;
729         }
730         
731         ucontrol->value.integer.value[0] = left;
732         if (shift_left != shift_right)
733                 ucontrol->value.integer.value[1] = right;
734
735         spin_unlock_irq(&h->mixer_lock);
736
737         return 0;
738 }  
739
740 static int 
741 snd_harmony_volume_put(struct snd_kcontrol *kc, 
742                        struct snd_ctl_elem_value *ucontrol)
743 {
744         struct snd_harmony *h = snd_kcontrol_chip(kc);
745         int shift_left = (kc->private_value) & 0xff;
746         int shift_right = (kc->private_value >> 8) & 0xff;
747         int mask = (kc->private_value >> 16) & 0xff;
748         int invert = (kc->private_value >> 24) & 0xff;
749         int left, right;
750         int old_gain = h->st.gain;
751         
752         spin_lock_irq(&h->mixer_lock);
753
754         left = ucontrol->value.integer.value[0] & mask;
755         if (invert)
756                 left = mask - left;
757         h->st.gain &= ~( (mask << shift_left ) );
758         h->st.gain |= (left << shift_left);
759
760         if (shift_left != shift_right) {
761                 right = ucontrol->value.integer.value[1] & mask;
762                 if (invert)
763                         right = mask - right;
764                 h->st.gain &= ~( (mask << shift_right) );
765                 h->st.gain |= (right << shift_right);
766         }
767
768         snd_harmony_set_new_gain(h);
769
770         spin_unlock_irq(&h->mixer_lock);
771         
772         return h->st.gain != old_gain;
773 }
774
775 static int 
776 snd_harmony_captureroute_info(struct snd_kcontrol *kc, 
777                               struct snd_ctl_elem_info *uinfo)
778 {
779         static char *texts[2] = { "Line", "Mic" };
780         uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
781         uinfo->count = 1;
782         uinfo->value.enumerated.items = 2;
783         if (uinfo->value.enumerated.item > 1)
784                 uinfo->value.enumerated.item = 1;
785         strcpy(uinfo->value.enumerated.name,
786                texts[uinfo->value.enumerated.item]);
787         return 0;
788 }
789
790 static int 
791 snd_harmony_captureroute_get(struct snd_kcontrol *kc, 
792                              struct snd_ctl_elem_value *ucontrol)
793 {
794         struct snd_harmony *h = snd_kcontrol_chip(kc);
795         int value;
796         
797         spin_lock_irq(&h->mixer_lock);
798
799         value = (h->st.gain >> HARMONY_GAIN_IS_SHIFT) & 1;
800         ucontrol->value.enumerated.item[0] = value;
801
802         spin_unlock_irq(&h->mixer_lock);
803
804         return 0;
805 }  
806
807 static int 
808 snd_harmony_captureroute_put(struct snd_kcontrol *kc, 
809                              struct snd_ctl_elem_value *ucontrol)
810 {
811         struct snd_harmony *h = snd_kcontrol_chip(kc);
812         int value;
813         int old_gain = h->st.gain;
814         
815         spin_lock_irq(&h->mixer_lock);
816
817         value = ucontrol->value.enumerated.item[0] & 1;
818         h->st.gain &= ~HARMONY_GAIN_IS_MASK;
819         h->st.gain |= value << HARMONY_GAIN_IS_SHIFT;
820
821         snd_harmony_set_new_gain(h);
822
823         spin_unlock_irq(&h->mixer_lock);
824         
825         return h->st.gain != old_gain;
826 }
827
828 #define HARMONY_CONTROLS        ARRAY_SIZE(snd_harmony_controls)
829
830 #define HARMONY_VOLUME(xname, left_shift, right_shift, mask, invert) \
831 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,                \
832   .info = snd_harmony_mixercontrol_info,                             \
833   .get = snd_harmony_volume_get, .put = snd_harmony_volume_put,      \
834   .private_value = ((left_shift) | ((right_shift) << 8) |            \
835                    ((mask) << 16) | ((invert) << 24)) }
836
837 static struct snd_kcontrol_new snd_harmony_controls[] = {
838         HARMONY_VOLUME("Master Playback Volume", HARMONY_GAIN_LO_SHIFT, 
839                        HARMONY_GAIN_RO_SHIFT, HARMONY_GAIN_OUT, 1),
840         HARMONY_VOLUME("Capture Volume", HARMONY_GAIN_LI_SHIFT,
841                        HARMONY_GAIN_RI_SHIFT, HARMONY_GAIN_IN, 0),
842         HARMONY_VOLUME("Monitor Volume", HARMONY_GAIN_MA_SHIFT,
843                        HARMONY_GAIN_MA_SHIFT, HARMONY_GAIN_MA, 1),
844         {
845                 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
846                 .name = "Input Route",
847                 .info = snd_harmony_captureroute_info,
848                 .get = snd_harmony_captureroute_get,
849                 .put = snd_harmony_captureroute_put
850         },
851         HARMONY_VOLUME("Internal Speaker Switch", HARMONY_GAIN_SE_SHIFT,
852                        HARMONY_GAIN_SE_SHIFT, 1, 0),
853         HARMONY_VOLUME("Line-Out Switch", HARMONY_GAIN_LE_SHIFT,
854                        HARMONY_GAIN_LE_SHIFT, 1, 0),
855         HARMONY_VOLUME("Headphones Switch", HARMONY_GAIN_HE_SHIFT,
856                        HARMONY_GAIN_HE_SHIFT, 1, 0),
857 };
858
859 static void __devinit
860 snd_harmony_mixer_reset(struct snd_harmony *h)
861 {
862         harmony_mute(h);
863         harmony_reset(h);
864         h->st.gain = HARMONY_GAIN_DEFAULT;
865         harmony_unmute(h);
866 }
867
868 static int __devinit
869 snd_harmony_mixer_init(struct snd_harmony *h)
870 {
871         struct snd_card *card;
872         int idx, err;
873
874         if (snd_BUG_ON(!h))
875                 return -EINVAL;
876         card = h->card;
877         strcpy(card->mixername, "Harmony Gain control interface");
878
879         for (idx = 0; idx < HARMONY_CONTROLS; idx++) {
880                 err = snd_ctl_add(card, 
881                                   snd_ctl_new1(&snd_harmony_controls[idx], h));
882                 if (err < 0)
883                         return err;
884         }
885         
886         snd_harmony_mixer_reset(h);
887
888         return 0;
889 }
890
891 static int
892 snd_harmony_free(struct snd_harmony *h)
893 {
894         if (h->gdma.addr)
895                 snd_dma_free_pages(&h->gdma);
896         if (h->sdma.addr)
897                 snd_dma_free_pages(&h->sdma);
898
899         if (h->irq >= 0)
900                 free_irq(h->irq, h);
901
902         if (h->iobase)
903                 iounmap(h->iobase);
904
905         parisc_set_drvdata(h->dev, NULL);
906
907         kfree(h);
908         return 0;
909 }
910
911 static int
912 snd_harmony_dev_free(struct snd_device *dev)
913 {
914         struct snd_harmony *h = dev->device_data;
915         return snd_harmony_free(h);
916 }
917
918 static int __devinit
919 snd_harmony_create(struct snd_card *card, 
920                    struct parisc_device *padev, 
921                    struct snd_harmony **rchip)
922 {
923         int err;
924         struct snd_harmony *h;
925         static struct snd_device_ops ops = {
926                 .dev_free = snd_harmony_dev_free,
927         };
928
929         *rchip = NULL;
930
931         h = kzalloc(sizeof(*h), GFP_KERNEL);
932         if (h == NULL)
933                 return -ENOMEM;
934
935         h->hpa = padev->hpa.start;
936         h->card = card;
937         h->dev = padev;
938         h->irq = -1;
939         h->iobase = ioremap_nocache(padev->hpa.start, HARMONY_SIZE);
940         if (h->iobase == NULL) {
941                 printk(KERN_ERR PFX "unable to remap hpa 0x%lx\n",
942                        (unsigned long)padev->hpa.start);
943                 err = -EBUSY;
944                 goto free_and_ret;
945         }
946                 
947         err = request_irq(padev->irq, snd_harmony_interrupt, 0,
948                           "harmony", h);
949         if (err) {
950                 printk(KERN_ERR PFX "could not obtain interrupt %d",
951                        padev->irq);
952                 goto free_and_ret;
953         }
954         h->irq = padev->irq;
955
956         spin_lock_init(&h->mixer_lock);
957         spin_lock_init(&h->lock);
958
959         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
960                                   h, &ops)) < 0) {
961                 goto free_and_ret;
962         }
963
964         snd_card_set_dev(card, &padev->dev);
965
966         *rchip = h;
967
968         return 0;
969
970 free_and_ret:
971         snd_harmony_free(h);
972         return err;
973 }
974
975 static int __devinit
976 snd_harmony_probe(struct parisc_device *padev)
977 {
978         int err;
979         struct snd_card *card;
980         struct snd_harmony *h;
981
982         err = snd_card_create(index, id, THIS_MODULE, 0, &card);
983         if (err < 0)
984                 return err;
985
986         err = snd_harmony_create(card, padev, &h);
987         if (err < 0)
988                 goto free_and_ret;
989
990         err = snd_harmony_pcm_init(h);
991         if (err < 0)
992                 goto free_and_ret;
993
994         err = snd_harmony_mixer_init(h);
995         if (err < 0)
996                 goto free_and_ret;
997
998         strcpy(card->driver, "harmony");
999         strcpy(card->shortname, "Harmony");
1000         sprintf(card->longname, "%s at 0x%lx, irq %i",
1001                 card->shortname, h->hpa, h->irq);
1002
1003         err = snd_card_register(card);
1004         if (err < 0)
1005                 goto free_and_ret;
1006
1007         parisc_set_drvdata(padev, card);
1008         return 0;
1009
1010 free_and_ret:
1011         snd_card_free(card);
1012         return err;
1013 }
1014
1015 static int __devexit
1016 snd_harmony_remove(struct parisc_device *padev)
1017 {
1018         snd_card_free(parisc_get_drvdata(padev));
1019         parisc_set_drvdata(padev, NULL);
1020         return 0;
1021 }
1022
1023 static struct parisc_driver snd_harmony_driver = {
1024         .name = "harmony",
1025         .id_table = snd_harmony_devtable,
1026         .probe = snd_harmony_probe,
1027         .remove = __devexit_p(snd_harmony_remove),
1028 };
1029
1030 static int __init 
1031 alsa_harmony_init(void)
1032 {
1033         return register_parisc_driver(&snd_harmony_driver);
1034 }
1035
1036 static void __exit
1037 alsa_harmony_fini(void)
1038 {
1039         unregister_parisc_driver(&snd_harmony_driver);
1040 }
1041
1042 MODULE_LICENSE("GPL");
1043 MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>");
1044 MODULE_DESCRIPTION("Harmony sound driver");
1045
1046 module_init(alsa_harmony_init);
1047 module_exit(alsa_harmony_fini);