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#include <linux/io.h>
48
49#include <sound/core.h>
50#include <sound/pcm.h>
51#include <sound/control.h>
52#include <sound/rawmidi.h>
53#include <sound/initval.h>
54#include <sound/info.h>
55
56#include <asm/hardware.h>
57#include <asm/parisc-device.h>
58
59#include "harmony.h"
60
61static int index = SNDRV_DEFAULT_IDX1;	/* Index 0-MAX */
62static char *id = SNDRV_DEFAULT_STR1;	/* ID for this card */
63module_param(index, int, 0444);
64MODULE_PARM_DESC(index, "Index value for Harmony driver.");
65module_param(id, charp, 0444);
66MODULE_PARM_DESC(id, "ID string for Harmony driver.");
67
68
69static 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
81MODULE_DEVICE_TABLE(parisc, snd_harmony_devtable);
82
83#define NAME "harmony"
84#define PFX  NAME ": "
85
86static 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
93static 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
101static 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
107static inline unsigned long
108harmony_read(struct snd_harmony *h, unsigned r)
109{
110	return __raw_readl(h->iobase + r);
111}
112
113static inline void
114harmony_write(struct snd_harmony *h, unsigned r, unsigned long v)
115{
116	__raw_writel(v, h->iobase + r);
117}
118
119static inline void
120harmony_wait_for_control(struct snd_harmony *h)
121{
122	while (harmony_read(h, HARMONY_CNTL) & HARMONY_CNTL_C) ;
123}
124
125static inline void
126harmony_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
133static void
134harmony_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
143static void
144harmony_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
153static void
154harmony_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
164static void
165harmony_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
175static void
176harmony_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
194static irqreturn_t
195snd_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
251static unsigned int
252snd_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
263static 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
284static 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
305static int
306snd_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
341static int
342snd_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
377static int
378snd_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
407static int
408snd_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
437static int
438snd_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
467static snd_pcm_uframes_t
468snd_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
496static snd_pcm_uframes_t
497snd_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
525static int
526snd_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
544static int
545snd_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
563static int
564snd_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
571static int
572snd_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
579static int
580snd_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
593static int
594snd_harmony_hw_free(struct snd_pcm_substream *ss)
595{
596	return snd_pcm_lib_free_pages(ss);
597}
598
599static 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
610static 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
621static int
622snd_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
687static void
688snd_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
694static int
695snd_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
711static int
712snd_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
740static int
741snd_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
775static int
776snd_harmony_captureroute_info(struct snd_kcontrol *kc,
777			      struct snd_ctl_elem_info *uinfo)
778{
779	static const char * const texts[2] = { "Line", "Mic" };
780
781	return snd_ctl_enum_info(uinfo, 1, 2, texts);
782}
783
784static int
785snd_harmony_captureroute_get(struct snd_kcontrol *kc,
786			     struct snd_ctl_elem_value *ucontrol)
787{
788	struct snd_harmony *h = snd_kcontrol_chip(kc);
789	int value;
790
791	spin_lock_irq(&h->mixer_lock);
792
793	value = (h->st.gain >> HARMONY_GAIN_IS_SHIFT) & 1;
794	ucontrol->value.enumerated.item[0] = value;
795
796	spin_unlock_irq(&h->mixer_lock);
797
798	return 0;
799}
800
801static int
802snd_harmony_captureroute_put(struct snd_kcontrol *kc,
803			     struct snd_ctl_elem_value *ucontrol)
804{
805	struct snd_harmony *h = snd_kcontrol_chip(kc);
806	int value;
807	int old_gain = h->st.gain;
808
809	spin_lock_irq(&h->mixer_lock);
810
811	value = ucontrol->value.enumerated.item[0] & 1;
812	h->st.gain &= ~HARMONY_GAIN_IS_MASK;
813 	h->st.gain |= value << HARMONY_GAIN_IS_SHIFT;
814
815	snd_harmony_set_new_gain(h);
816
817	spin_unlock_irq(&h->mixer_lock);
818
819	return h->st.gain != old_gain;
820}
821
822#define HARMONY_CONTROLS	ARRAY_SIZE(snd_harmony_controls)
823
824#define HARMONY_VOLUME(xname, left_shift, right_shift, mask, invert) \
825{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname,                \
826  .info = snd_harmony_mixercontrol_info,                             \
827  .get = snd_harmony_volume_get, .put = snd_harmony_volume_put,      \
828  .private_value = ((left_shift) | ((right_shift) << 8) |            \
829                   ((mask) << 16) | ((invert) << 24)) }
830
831static struct snd_kcontrol_new snd_harmony_controls[] = {
832	HARMONY_VOLUME("Master Playback Volume", HARMONY_GAIN_LO_SHIFT,
833		       HARMONY_GAIN_RO_SHIFT, HARMONY_GAIN_OUT, 1),
834	HARMONY_VOLUME("Capture Volume", HARMONY_GAIN_LI_SHIFT,
835		       HARMONY_GAIN_RI_SHIFT, HARMONY_GAIN_IN, 0),
836	HARMONY_VOLUME("Monitor Volume", HARMONY_GAIN_MA_SHIFT,
837		       HARMONY_GAIN_MA_SHIFT, HARMONY_GAIN_MA, 1),
838	{
839		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
840		.name = "Input Route",
841		.info = snd_harmony_captureroute_info,
842		.get = snd_harmony_captureroute_get,
843		.put = snd_harmony_captureroute_put
844	},
845	HARMONY_VOLUME("Internal Speaker Switch", HARMONY_GAIN_SE_SHIFT,
846		       HARMONY_GAIN_SE_SHIFT, 1, 0),
847	HARMONY_VOLUME("Line-Out Switch", HARMONY_GAIN_LE_SHIFT,
848		       HARMONY_GAIN_LE_SHIFT, 1, 0),
849	HARMONY_VOLUME("Headphones Switch", HARMONY_GAIN_HE_SHIFT,
850		       HARMONY_GAIN_HE_SHIFT, 1, 0),
851};
852
853static void
854snd_harmony_mixer_reset(struct snd_harmony *h)
855{
856	harmony_mute(h);
857	harmony_reset(h);
858	h->st.gain = HARMONY_GAIN_DEFAULT;
859	harmony_unmute(h);
860}
861
862static int
863snd_harmony_mixer_init(struct snd_harmony *h)
864{
865	struct snd_card *card;
866	int idx, err;
867
868	if (snd_BUG_ON(!h))
869		return -EINVAL;
870	card = h->card;
871	strcpy(card->mixername, "Harmony Gain control interface");
872
873	for (idx = 0; idx < HARMONY_CONTROLS; idx++) {
874		err = snd_ctl_add(card,
875				  snd_ctl_new1(&snd_harmony_controls[idx], h));
876		if (err < 0)
877			return err;
878	}
879
880	snd_harmony_mixer_reset(h);
881
882	return 0;
883}
884
885static int
886snd_harmony_free(struct snd_harmony *h)
887{
888        if (h->gdma.addr)
889                snd_dma_free_pages(&h->gdma);
890        if (h->sdma.addr)
891                snd_dma_free_pages(&h->sdma);
892
893	if (h->irq >= 0)
894		free_irq(h->irq, h);
895
896	iounmap(h->iobase);
897	kfree(h);
898	return 0;
899}
900
901static int
902snd_harmony_dev_free(struct snd_device *dev)
903{
904	struct snd_harmony *h = dev->device_data;
905	return snd_harmony_free(h);
906}
907
908static int
909snd_harmony_create(struct snd_card *card,
910		   struct parisc_device *padev,
911		   struct snd_harmony **rchip)
912{
913	int err;
914	struct snd_harmony *h;
915	static struct snd_device_ops ops = {
916		.dev_free = snd_harmony_dev_free,
917	};
918
919	*rchip = NULL;
920
921	h = kzalloc(sizeof(*h), GFP_KERNEL);
922	if (h == NULL)
923		return -ENOMEM;
924
925	h->hpa = padev->hpa.start;
926	h->card = card;
927	h->dev = padev;
928	h->irq = -1;
929	h->iobase = ioremap_nocache(padev->hpa.start, HARMONY_SIZE);
930	if (h->iobase == NULL) {
931		printk(KERN_ERR PFX "unable to remap hpa 0x%lx\n",
932		       (unsigned long)padev->hpa.start);
933		err = -EBUSY;
934		goto free_and_ret;
935	}
936
937	err = request_irq(padev->irq, snd_harmony_interrupt, 0,
938			  "harmony", h);
939	if (err) {
940		printk(KERN_ERR PFX "could not obtain interrupt %d",
941		       padev->irq);
942		goto free_and_ret;
943	}
944	h->irq = padev->irq;
945
946	spin_lock_init(&h->mixer_lock);
947	spin_lock_init(&h->lock);
948
949        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
950                                  h, &ops)) < 0) {
951                goto free_and_ret;
952        }
953
954	*rchip = h;
955
956	return 0;
957
958free_and_ret:
959	snd_harmony_free(h);
960	return err;
961}
962
963static int
964snd_harmony_probe(struct parisc_device *padev)
965{
966	int err;
967	struct snd_card *card;
968	struct snd_harmony *h;
969
970	err = snd_card_new(&padev->dev, index, id, THIS_MODULE, 0, &card);
971	if (err < 0)
972		return err;
973
974	err = snd_harmony_create(card, padev, &h);
975	if (err < 0)
976		goto free_and_ret;
977
978	err = snd_harmony_pcm_init(h);
979	if (err < 0)
980		goto free_and_ret;
981
982	err = snd_harmony_mixer_init(h);
983	if (err < 0)
984		goto free_and_ret;
985
986	strcpy(card->driver, "harmony");
987	strcpy(card->shortname, "Harmony");
988	sprintf(card->longname, "%s at 0x%lx, irq %i",
989		card->shortname, h->hpa, h->irq);
990
991	err = snd_card_register(card);
992	if (err < 0)
993		goto free_and_ret;
994
995	parisc_set_drvdata(padev, card);
996	return 0;
997
998free_and_ret:
999	snd_card_free(card);
1000	return err;
1001}
1002
1003static int
1004snd_harmony_remove(struct parisc_device *padev)
1005{
1006	snd_card_free(parisc_get_drvdata(padev));
1007	return 0;
1008}
1009
1010static struct parisc_driver snd_harmony_driver = {
1011	.name = "harmony",
1012	.id_table = snd_harmony_devtable,
1013	.probe = snd_harmony_probe,
1014	.remove = snd_harmony_remove,
1015};
1016
1017static int __init
1018alsa_harmony_init(void)
1019{
1020	return register_parisc_driver(&snd_harmony_driver);
1021}
1022
1023static void __exit
1024alsa_harmony_fini(void)
1025{
1026	unregister_parisc_driver(&snd_harmony_driver);
1027}
1028
1029MODULE_LICENSE("GPL");
1030MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>");
1031MODULE_DESCRIPTION("Harmony sound driver");
1032
1033module_init(alsa_harmony_init);
1034module_exit(alsa_harmony_fini);
1035