[deliverable/linux.git] / drivers / media / usb / go7007 / snd-go7007.c

/*
 * Copyright (C) 2005-2006 Micronas USA Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License (Version 2) as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/vmalloc.h>
#include <linux/time.h>
#include <linux/mm.h>
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <linux/uaccess.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>

#include "go7007-priv.h"

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
module_param_array(id, charp, NULL, 0444);
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the go7007 audio driver");
MODULE_PARM_DESC(id, "ID string for the go7007 audio driver");
MODULE_PARM_DESC(enable, "Enable for the go7007 audio driver");

struct go7007_snd {
	struct snd_card *card;
	struct snd_pcm *pcm;
	struct snd_pcm_substream *substream;
	spinlock_t lock;
	int w_idx;
	int hw_ptr;
	int avail;
	int capturing;
};

static struct snd_pcm_hardware go7007_snd_capture_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
					SNDRV_PCM_INFO_INTERLEAVED |
					SNDRV_PCM_INFO_BLOCK_TRANSFER |
					SNDRV_PCM_INFO_MMAP_VALID),
	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
	.rates			= SNDRV_PCM_RATE_48000,
	.rate_min		= 48000,
	.rate_max		= 48000,
	.channels_min		= 2,
	.channels_max		= 2,
	.buffer_bytes_max	= (128*1024),
	.period_bytes_min	= 4096,
	.period_bytes_max	= (128*1024),
	.periods_min		= 1,
	.periods_max		= 32,
};

static void parse_audio_stream_data(struct go7007 *go, u8 *buf, int length)
{
	struct go7007_snd *gosnd = go->snd_context;
	struct snd_pcm_runtime *runtime = gosnd->substream->runtime;
	int frames = bytes_to_frames(runtime, length);

	spin_lock(&gosnd->lock);
	gosnd->hw_ptr += frames;
	if (gosnd->hw_ptr >= runtime->buffer_size)
		gosnd->hw_ptr -= runtime->buffer_size;
	gosnd->avail += frames;
	spin_unlock(&gosnd->lock);
	if (gosnd->w_idx + length > runtime->dma_bytes) {
		int cpy = runtime->dma_bytes - gosnd->w_idx;

		memcpy(runtime->dma_area + gosnd->w_idx, buf, cpy);
		length -= cpy;
		buf += cpy;
		gosnd->w_idx = 0;
	}
	memcpy(runtime->dma_area + gosnd->w_idx, buf, length);
	gosnd->w_idx += length;
	spin_lock(&gosnd->lock);
	if (gosnd->avail < runtime->period_size) {
		spin_unlock(&gosnd->lock);
		return;
	}
	gosnd->avail -= runtime->period_size;
	spin_unlock(&gosnd->lock);
	if (gosnd->capturing)
		snd_pcm_period_elapsed(gosnd->substream);
}

static int go7007_snd_hw_params(struct snd_pcm_substream *substream,
				struct snd_pcm_hw_params *hw_params)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);
	unsigned int bytes;

	bytes = params_buffer_bytes(hw_params);
	if (substream->runtime->dma_bytes > 0)
		vfree(substream->runtime->dma_area);
	substream->runtime->dma_bytes = 0;
	substream->runtime->dma_area = vmalloc(bytes);
	if (substream->runtime->dma_area == NULL)
		return -ENOMEM;
	substream->runtime->dma_bytes = bytes;
	go->audio_deliver = parse_audio_stream_data;
	return 0;
}

static int go7007_snd_hw_free(struct snd_pcm_substream *substream)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);

	go->audio_deliver = NULL;
	if (substream->runtime->dma_bytes > 0)
		vfree(substream->runtime->dma_area);
	substream->runtime->dma_bytes = 0;
	return 0;
}

static int go7007_snd_capture_open(struct snd_pcm_substream *substream)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);
	struct go7007_snd *gosnd = go->snd_context;
	unsigned long flags;
	int r;

	spin_lock_irqsave(&gosnd->lock, flags);
	if (gosnd->substream == NULL) {
		gosnd->substream = substream;
		substream->runtime->hw = go7007_snd_capture_hw;
		r = 0;
	} else
		r = -EBUSY;
	spin_unlock_irqrestore(&gosnd->lock, flags);
	return r;
}

static int go7007_snd_capture_close(struct snd_pcm_substream *substream)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);
	struct go7007_snd *gosnd = go->snd_context;

	gosnd->substream = NULL;
	return 0;
}

static int go7007_snd_pcm_prepare(struct snd_pcm_substream *substream)
{
	return 0;
}

static int go7007_snd_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);
	struct go7007_snd *gosnd = go->snd_context;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		/* Just set a flag to indicate we should signal ALSA when
		 * sound comes in */
		gosnd->capturing = 1;
		return 0;
	case SNDRV_PCM_TRIGGER_STOP:
		gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
		gosnd->capturing = 0;
		return 0;
	default:
		return -EINVAL;
	}
}

static snd_pcm_uframes_t go7007_snd_pcm_pointer(struct snd_pcm_substream *substream)
{
	struct go7007 *go = snd_pcm_substream_chip(substream);
	struct go7007_snd *gosnd = go->snd_context;

	return gosnd->hw_ptr;
}

static struct page *go7007_snd_pcm_page(struct snd_pcm_substream *substream,
					unsigned long offset)
{
	return vmalloc_to_page(substream->runtime->dma_area + offset);
}

static struct snd_pcm_ops go7007_snd_capture_ops = {
	.open		= go7007_snd_capture_open,
	.close		= go7007_snd_capture_close,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= go7007_snd_hw_params,
	.hw_free	= go7007_snd_hw_free,
	.prepare	= go7007_snd_pcm_prepare,
	.trigger	= go7007_snd_pcm_trigger,
	.pointer	= go7007_snd_pcm_pointer,
	.page		= go7007_snd_pcm_page,
};

static int go7007_snd_free(struct snd_device *device)
{
	struct go7007 *go = device->device_data;

	kfree(go->snd_context);
	go->snd_context = NULL;
	return 0;
}

static struct snd_device_ops go7007_snd_device_ops = {
	.dev_free	= go7007_snd_free,
};

int go7007_snd_init(struct go7007 *go)
{
	static int dev;
	struct go7007_snd *gosnd;
	int ret = 0;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}
	gosnd = kmalloc(sizeof(struct go7007_snd), GFP_KERNEL);
	if (gosnd == NULL)
		return -ENOMEM;
	spin_lock_init(&gosnd->lock);
	gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
	gosnd->capturing = 0;
	ret = snd_card_new(go->dev, index[dev], id[dev], THIS_MODULE, 0,
			   &gosnd->card);
	if (ret < 0) {
		kfree(gosnd);
		return ret;
	}
	ret = snd_device_new(gosnd->card, SNDRV_DEV_LOWLEVEL, go,
			&go7007_snd_device_ops);
	if (ret < 0) {
		kfree(gosnd);
		return ret;
	}
	ret = snd_pcm_new(gosnd->card, "go7007", 0, 0, 1, &gosnd->pcm);
	if (ret < 0) {
		snd_card_free(gosnd->card);
		kfree(gosnd);
		return ret;
	}
	strlcpy(gosnd->card->driver, "go7007", sizeof(gosnd->card->driver));
	strlcpy(gosnd->card->shortname, go->name, sizeof(gosnd->card->driver));
	strlcpy(gosnd->card->longname, gosnd->card->shortname,
			sizeof(gosnd->card->longname));

	gosnd->pcm->private_data = go;
	snd_pcm_set_ops(gosnd->pcm, SNDRV_PCM_STREAM_CAPTURE,
			&go7007_snd_capture_ops);

	ret = snd_card_register(gosnd->card);
	if (ret < 0) {
		snd_card_free(gosnd->card);
		kfree(gosnd);
		return ret;
	}

	gosnd->substream = NULL;
	go->snd_context = gosnd;
	v4l2_device_get(&go->v4l2_dev);
	++dev;

	return 0;
}
EXPORT_SYMBOL(go7007_snd_init);

int go7007_snd_remove(struct go7007 *go)
{
	struct go7007_snd *gosnd = go->snd_context;

	snd_card_disconnect(gosnd->card);
	snd_card_free_when_closed(gosnd->card);
	v4l2_device_put(&go->v4l2_dev);
	return 0;
}
EXPORT_SYMBOL(go7007_snd_remove);

MODULE_LICENSE("GPL v2");
Commit	Line	Data
866b8695 GKH	1	/*
	2	* Copyright (C) 2005-2006 Micronas USA Inc.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License (Version 2) as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
866b8695 GKH	12	*/
	13
	14	#include <linux/kernel.h>
	15	#include <linux/module.h>
866b8695	16	#include <linux/moduleparam.h>
866b8695 GKH	17	#include <linux/spinlock.h>
	18	#include <linux/delay.h>
	19	#include <linux/sched.h>
	20	#include <linux/vmalloc.h>
	21	#include <linux/time.h>
	22	#include <linux/mm.h>
	23	#include <linux/i2c.h>
fd9a40da	24	#include <linux/mutex.h>
866b8695	25	#include <linux/uaccess.h>
5a0e3ad6	26	#include <linux/slab.h>
866b8695 GKH	27	#include <sound/core.h>
	28	#include <sound/pcm.h>
	29	#include <sound/initval.h>
	30
	31	#include "go7007-priv.h"
	32
	33	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
	34	static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
90ab5ee9	35	static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
866b8695 GKH	36
	37	module_param_array(index, int, NULL, 0444);
	38	module_param_array(id, charp, NULL, 0444);
	39	module_param_array(enable, bool, NULL, 0444);
	40	MODULE_PARM_DESC(index, "Index value for the go7007 audio driver");
df20d69e RC	41	MODULE_PARM_DESC(id, "ID string for the go7007 audio driver");
df20d69e RC	42	MODULE_PARM_DESC(enable, "Enable for the go7007 audio driver");
866b8695 GKH	43
	44	struct go7007_snd {
	45	struct snd_card *card;
	46	struct snd_pcm *pcm;
	47	struct snd_pcm_substream *substream;
	48	spinlock_t lock;
	49	int w_idx;
	50	int hw_ptr;
	51	int avail;
	52	int capturing;
	53	};
	54
	55	static struct snd_pcm_hardware go7007_snd_capture_hw = {
	56	.info = (SNDRV_PCM_INFO_MMAP \|
	57	SNDRV_PCM_INFO_INTERLEAVED \|
	58	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	59	SNDRV_PCM_INFO_MMAP_VALID),
	60	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	61	.rates = SNDRV_PCM_RATE_48000,
	62	.rate_min = 48000,
	63	.rate_max = 48000,
	64	.channels_min = 2,
	65	.channels_max = 2,
	66	.buffer_bytes_max = (128*1024),
	67	.period_bytes_min = 4096,
	68	.period_bytes_max = (128*1024),
	69	.periods_min = 1,
	70	.periods_max = 32,
	71	};
	72
	73	static void parse_audio_stream_data(struct go7007 go, u8 buf, int length)
	74	{
	75	struct go7007_snd *gosnd = go->snd_context;
	76	struct snd_pcm_runtime *runtime = gosnd->substream->runtime;
	77	int frames = bytes_to_frames(runtime, length);
	78
	79	spin_lock(&gosnd->lock);
	80	gosnd->hw_ptr += frames;
	81	if (gosnd->hw_ptr >= runtime->buffer_size)
	82	gosnd->hw_ptr -= runtime->buffer_size;
	83	gosnd->avail += frames;
	84	spin_unlock(&gosnd->lock);
	85	if (gosnd->w_idx + length > runtime->dma_bytes) {
	86	int cpy = runtime->dma_bytes - gosnd->w_idx;
	87
	88	memcpy(runtime->dma_area + gosnd->w_idx, buf, cpy);
	89	length -= cpy;
	90	buf += cpy;
	91	gosnd->w_idx = 0;
	92	}
	93	memcpy(runtime->dma_area + gosnd->w_idx, buf, length);
	94	gosnd->w_idx += length;
	95	spin_lock(&gosnd->lock);
	96	if (gosnd->avail < runtime->period_size) {
	97	spin_unlock(&gosnd->lock);
	98	return;
	99	}
	100	gosnd->avail -= runtime->period_size;
	101	spin_unlock(&gosnd->lock);
	102	if (gosnd->capturing)
	103	snd_pcm_period_elapsed(gosnd->substream);
	104	}
	105
	106	static int go7007_snd_hw_params(struct snd_pcm_substream *substream,
107	struct snd_pcm_hw_params *hw_params)
108	{
109	struct go7007 *go = snd_pcm_substream_chip(substream);
110	unsigned int bytes;
111
112	bytes = params_buffer_bytes(hw_params);
113	if (substream->runtime->dma_bytes > 0)
114	vfree(substream->runtime->dma_area);
115	substream->runtime->dma_bytes = 0;
116	substream->runtime->dma_area = vmalloc(bytes);
117	if (substream->runtime->dma_area == NULL)
118	return -ENOMEM;
119	substream->runtime->dma_bytes = bytes;
120	go->audio_deliver = parse_audio_stream_data;
121	return 0;
122	}
123
124	static int go7007_snd_hw_free(struct snd_pcm_substream *substream)
125	{
126	struct go7007 *go = snd_pcm_substream_chip(substream);
127
128	go->audio_deliver = NULL;
129	if (substream->runtime->dma_bytes > 0)
130	vfree(substream->runtime->dma_area);
131	substream->runtime->dma_bytes = 0;
132	return 0;
133	}
134
135	static int go7007_snd_capture_open(struct snd_pcm_substream *substream)
136	{
137	struct go7007 *go = snd_pcm_substream_chip(substream);
138	struct go7007_snd *gosnd = go->snd_context;
139	unsigned long flags;
140	int r;
141
142	spin_lock_irqsave(&gosnd->lock, flags);
143	if (gosnd->substream == NULL) {
144	gosnd->substream = substream;
145	substream->runtime->hw = go7007_snd_capture_hw;
146	r = 0;
147	} else
148	r = -EBUSY;
149	spin_unlock_irqrestore(&gosnd->lock, flags);
150	return r;
151	}
152
153	static int go7007_snd_capture_close(struct snd_pcm_substream *substream)
154	{
155	struct go7007 *go = snd_pcm_substream_chip(substream);
156	struct go7007_snd *gosnd = go->snd_context;
157
158	gosnd->substream = NULL;
159	return 0;
160	}
161
162	static int go7007_snd_pcm_prepare(struct snd_pcm_substream *substream)
163	{
164	return 0;
165	}
166
167	static int go7007_snd_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
168	{
169	struct go7007 *go = snd_pcm_substream_chip(substream);
170	struct go7007_snd *gosnd = go->snd_context;
171
172	switch (cmd) {
173	case SNDRV_PCM_TRIGGER_START:
174	/* Just set a flag to indicate we should signal ALSA when
175	* sound comes in */
176	gosnd->capturing = 1;
177	return 0;
178	case SNDRV_PCM_TRIGGER_STOP:
179	gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
180	gosnd->capturing = 0;
181	return 0;
182	default:
183	return -EINVAL;
184	}
185	}
186
187	static snd_pcm_uframes_t go7007_snd_pcm_pointer(struct snd_pcm_substream *substream)
188	{
189	struct go7007 *go = snd_pcm_substream_chip(substream);
190	struct go7007_snd *gosnd = go->snd_context;
191
192	return gosnd->hw_ptr;
193	}
194
195	static struct page go7007_snd_pcm_page(struct snd_pcm_substream substream,
196	unsigned long offset)
197	{
198	return vmalloc_to_page(substream->runtime->dma_area + offset);
199	}
200
201	static struct snd_pcm_ops go7007_snd_capture_ops = {
202	.open = go7007_snd_capture_open,
203	.close = go7007_snd_capture_close,
204	.ioctl = snd_pcm_lib_ioctl,
205	.hw_params = go7007_snd_hw_params,
206	.hw_free = go7007_snd_hw_free,
207	.prepare = go7007_snd_pcm_prepare,
208	.trigger = go7007_snd_pcm_trigger,
209	.pointer = go7007_snd_pcm_pointer,
210	.page = go7007_snd_pcm_page,
211	};
212
213	static int go7007_snd_free(struct snd_device *device)
214	{
215	struct go7007 *go = device->device_data;
216
217	kfree(go->snd_context);
218	go->snd_context = NULL;
866b8695 GKH	219	return 0;
	220	}
	221
	222	static struct snd_device_ops go7007_snd_device_ops = {
	223	.dev_free = go7007_snd_free,
	224	};
	225
	226	int go7007_snd_init(struct go7007 *go)
	227	{
	228	static int dev;
	229	struct go7007_snd *gosnd;
	230	int ret = 0;
	231
	232	if (dev >= SNDRV_CARDS)
	233	return -ENODEV;
	234	if (!enable[dev]) {
	235	dev++;
	236	return -ENOENT;
	237	}
	238	gosnd = kmalloc(sizeof(struct go7007_snd), GFP_KERNEL);
	239	if (gosnd == NULL)
	240	return -ENOMEM;
	241	spin_lock_init(&gosnd->lock);
	242	gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
	243	gosnd->capturing = 0;
3a3d2afd TI	244	ret = snd_card_new(go->dev, index[dev], id[dev], THIS_MODULE, 0,
3a3d2afd TI	245	&gosnd->card);
6ff18716	246	if (ret < 0) {
866b8695	247	kfree(gosnd);
6ff18716	248	return ret;
866b8695 GKH	249	}
	250	ret = snd_device_new(gosnd->card, SNDRV_DEV_LOWLEVEL, go,
	251	&go7007_snd_device_ops);
	252	if (ret < 0) {
	253	kfree(gosnd);
	254	return ret;
	255	}
866b8695 GKH	256	ret = snd_pcm_new(gosnd->card, "go7007", 0, 0, 1, &gosnd->pcm);
	257	if (ret < 0) {
	258	snd_card_free(gosnd->card);
	259	kfree(gosnd);
	260	return ret;
	261	}
1c3fc152 CG	262	strlcpy(gosnd->card->driver, "go7007", sizeof(gosnd->card->driver));
	263	strlcpy(gosnd->card->shortname, go->name, sizeof(gosnd->card->driver));
	264	strlcpy(gosnd->card->longname, gosnd->card->shortname,
866b8695 GKH	265	sizeof(gosnd->card->longname));
	266
	267	gosnd->pcm->private_data = go;
	268	snd_pcm_set_ops(gosnd->pcm, SNDRV_PCM_STREAM_CAPTURE,
	269	&go7007_snd_capture_ops);
	270
	271	ret = snd_card_register(gosnd->card);
	272	if (ret < 0) {
	273	snd_card_free(gosnd->card);
	274	kfree(gosnd);
	275	return ret;
	276	}
	277
	278	gosnd->substream = NULL;
	279	go->snd_context = gosnd;
d5d3a7cc	280	v4l2_device_get(&go->v4l2_dev);
866b8695	281	++dev;
866b8695 GKH	282
	283	return 0;
	284	}
	285	EXPORT_SYMBOL(go7007_snd_init);
	286
	287	int go7007_snd_remove(struct go7007 *go)
	288	{
	289	struct go7007_snd *gosnd = go->snd_context;
	290
	291	snd_card_disconnect(gosnd->card);
	292	snd_card_free_when_closed(gosnd->card);
d5d3a7cc	293	v4l2_device_put(&go->v4l2_dev);
866b8695 GKH	294	return 0;
	295	}
	296	EXPORT_SYMBOL(go7007_snd_remove);
	297
	298	MODULE_LICENSE("GPL v2");