[linux-2.6-block.git] / drivers / staging / 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.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 <asm/system.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 int 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;
	if (--go->ref_count == 0)
		kfree(go);
	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_create(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;
	}
	snd_card_set_dev(gosnd->card, go->dev);
	ret = snd_pcm_new(gosnd->card, "go7007", 0, 0, 1, &gosnd->pcm);
	if (ret < 0) {
		snd_card_free(gosnd->card);
		kfree(gosnd);
		return ret;
	}
	strncpy(gosnd->card->driver, "go7007", sizeof(gosnd->card->driver));
	strncpy(gosnd->card->shortname, go->name, sizeof(gosnd->card->driver));
	strncpy(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;
	++dev;
	++go->ref_count;

	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);
	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.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software Foundation,
	15	* Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
	16	*/
	17
	18	#include <linux/kernel.h>
	19	#include <linux/module.h>
866b8695 GKH	20	#include <linux/moduleparam.h>
	21	#include <linux/init.h>
	22	#include <linux/spinlock.h>
	23	#include <linux/delay.h>
	24	#include <linux/sched.h>
	25	#include <linux/vmalloc.h>
	26	#include <linux/time.h>
	27	#include <linux/mm.h>
	28	#include <linux/i2c.h>
fd9a40da	29	#include <linux/mutex.h>
866b8695	30	#include <linux/uaccess.h>
5a0e3ad6	31	#include <linux/slab.h>
866b8695 GKH	32	#include <asm/system.h>
	33	#include <sound/core.h>
	34	#include <sound/pcm.h>
	35	#include <sound/initval.h>
	36
	37	#include "go7007-priv.h"
	38
	39	static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
	40	static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
	41	static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
	42
	43	module_param_array(index, int, NULL, 0444);
	44	module_param_array(id, charp, NULL, 0444);
	45	module_param_array(enable, bool, NULL, 0444);
	46	MODULE_PARM_DESC(index, "Index value for the go7007 audio driver");
df20d69e RC	47	MODULE_PARM_DESC(id, "ID string for the go7007 audio driver");
df20d69e RC	48	MODULE_PARM_DESC(enable, "Enable for the go7007 audio driver");
866b8695 GKH	49
	50	struct go7007_snd {
	51	struct snd_card *card;
	52	struct snd_pcm *pcm;
	53	struct snd_pcm_substream *substream;
	54	spinlock_t lock;
	55	int w_idx;
	56	int hw_ptr;
	57	int avail;
	58	int capturing;
	59	};
	60
	61	static struct snd_pcm_hardware go7007_snd_capture_hw = {
	62	.info = (SNDRV_PCM_INFO_MMAP \|
	63	SNDRV_PCM_INFO_INTERLEAVED \|
	64	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	65	SNDRV_PCM_INFO_MMAP_VALID),
	66	.formats = SNDRV_PCM_FMTBIT_S16_LE,
	67	.rates = SNDRV_PCM_RATE_48000,
	68	.rate_min = 48000,
	69	.rate_max = 48000,
	70	.channels_min = 2,
	71	.channels_max = 2,
	72	.buffer_bytes_max = (128*1024),
	73	.period_bytes_min = 4096,
	74	.period_bytes_max = (128*1024),
	75	.periods_min = 1,
	76	.periods_max = 32,
	77	};
	78
	79	static void parse_audio_stream_data(struct go7007 go, u8 buf, int length)
	80	{
	81	struct go7007_snd *gosnd = go->snd_context;
	82	struct snd_pcm_runtime *runtime = gosnd->substream->runtime;
	83	int frames = bytes_to_frames(runtime, length);
	84
	85	spin_lock(&gosnd->lock);
	86	gosnd->hw_ptr += frames;
	87	if (gosnd->hw_ptr >= runtime->buffer_size)
	88	gosnd->hw_ptr -= runtime->buffer_size;
	89	gosnd->avail += frames;
	90	spin_unlock(&gosnd->lock);
	91	if (gosnd->w_idx + length > runtime->dma_bytes) {
	92	int cpy = runtime->dma_bytes - gosnd->w_idx;
	93
	94	memcpy(runtime->dma_area + gosnd->w_idx, buf, cpy);
	95	length -= cpy;
	96	buf += cpy;
	97	gosnd->w_idx = 0;
	98	}
	99	memcpy(runtime->dma_area + gosnd->w_idx, buf, length);
	100	gosnd->w_idx += length;
	101	spin_lock(&gosnd->lock);
	102	if (gosnd->avail < runtime->period_size) {
	103	spin_unlock(&gosnd->lock);
	104	return;
	105	}
	106	gosnd->avail -= runtime->period_size;
	107	spin_unlock(&gosnd->lock);
	108	if (gosnd->capturing)
	109	snd_pcm_period_elapsed(gosnd->substream);
	110	}
	111
	112	static int go7007_snd_hw_params(struct snd_pcm_substream *substream,
113	struct snd_pcm_hw_params *hw_params)
114	{
115	struct go7007 *go = snd_pcm_substream_chip(substream);
116	unsigned int bytes;
117
118	bytes = params_buffer_bytes(hw_params);
119	if (substream->runtime->dma_bytes > 0)
120	vfree(substream->runtime->dma_area);
121	substream->runtime->dma_bytes = 0;
122	substream->runtime->dma_area = vmalloc(bytes);
123	if (substream->runtime->dma_area == NULL)
124	return -ENOMEM;
125	substream->runtime->dma_bytes = bytes;
126	go->audio_deliver = parse_audio_stream_data;
127	return 0;
128	}
129
130	static int go7007_snd_hw_free(struct snd_pcm_substream *substream)
131	{
132	struct go7007 *go = snd_pcm_substream_chip(substream);
133
134	go->audio_deliver = NULL;
135	if (substream->runtime->dma_bytes > 0)
136	vfree(substream->runtime->dma_area);
137	substream->runtime->dma_bytes = 0;
138	return 0;
139	}
140
141	static int go7007_snd_capture_open(struct snd_pcm_substream *substream)
142	{
143	struct go7007 *go = snd_pcm_substream_chip(substream);
144	struct go7007_snd *gosnd = go->snd_context;
145	unsigned long flags;
146	int r;
147
148	spin_lock_irqsave(&gosnd->lock, flags);
149	if (gosnd->substream == NULL) {
150	gosnd->substream = substream;
151	substream->runtime->hw = go7007_snd_capture_hw;
152	r = 0;
153	} else
154	r = -EBUSY;
155	spin_unlock_irqrestore(&gosnd->lock, flags);
156	return r;
157	}
158
159	static int go7007_snd_capture_close(struct snd_pcm_substream *substream)
160	{
161	struct go7007 *go = snd_pcm_substream_chip(substream);
162	struct go7007_snd *gosnd = go->snd_context;
163
164	gosnd->substream = NULL;
165	return 0;
166	}
167
168	static int go7007_snd_pcm_prepare(struct snd_pcm_substream *substream)
169	{
170	return 0;
171	}
172
173	static int go7007_snd_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
174	{
175	struct go7007 *go = snd_pcm_substream_chip(substream);
176	struct go7007_snd *gosnd = go->snd_context;
177
178	switch (cmd) {
179	case SNDRV_PCM_TRIGGER_START:
180	/* Just set a flag to indicate we should signal ALSA when
181	* sound comes in */
182	gosnd->capturing = 1;
183	return 0;
184	case SNDRV_PCM_TRIGGER_STOP:
185	gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
186	gosnd->capturing = 0;
187	return 0;
188	default:
189	return -EINVAL;
190	}
191	}
192
193	static snd_pcm_uframes_t go7007_snd_pcm_pointer(struct snd_pcm_substream *substream)
194	{
195	struct go7007 *go = snd_pcm_substream_chip(substream);
196	struct go7007_snd *gosnd = go->snd_context;
197
198	return gosnd->hw_ptr;
199	}
200
201	static struct page go7007_snd_pcm_page(struct snd_pcm_substream substream,
202	unsigned long offset)
203	{
204	return vmalloc_to_page(substream->runtime->dma_area + offset);
205	}
206
207	static struct snd_pcm_ops go7007_snd_capture_ops = {
208	.open = go7007_snd_capture_open,
209	.close = go7007_snd_capture_close,
210	.ioctl = snd_pcm_lib_ioctl,
211	.hw_params = go7007_snd_hw_params,
212	.hw_free = go7007_snd_hw_free,
213	.prepare = go7007_snd_pcm_prepare,
214	.trigger = go7007_snd_pcm_trigger,
215	.pointer = go7007_snd_pcm_pointer,
216	.page = go7007_snd_pcm_page,
217	};
218
219	static int go7007_snd_free(struct snd_device *device)
220	{
221	struct go7007 *go = device->device_data;
222
223	kfree(go->snd_context);
224	go->snd_context = NULL;
225	if (--go->ref_count == 0)
226	kfree(go);
227	return 0;
228	}
229
230	static struct snd_device_ops go7007_snd_device_ops = {
231	.dev_free = go7007_snd_free,
232	};
233
234	int go7007_snd_init(struct go7007 *go)
235	{
236	static int dev;
237	struct go7007_snd *gosnd;
238	int ret = 0;
239
240	if (dev >= SNDRV_CARDS)
241	return -ENODEV;
242	if (!enable[dev]) {
243	dev++;
244	return -ENOENT;
245	}
246	gosnd = kmalloc(sizeof(struct go7007_snd), GFP_KERNEL);
247	if (gosnd == NULL)
248	return -ENOMEM;
249	spin_lock_init(&gosnd->lock);
250	gosnd->hw_ptr = gosnd->w_idx = gosnd->avail = 0;
251	gosnd->capturing = 0;
6ff18716 TI	252	ret = snd_card_create(index[dev], id[dev], THIS_MODULE, 0,
	253	&gosnd->card);
	254	if (ret < 0) {
866b8695	255	kfree(gosnd);
6ff18716	256	return ret;
866b8695 GKH	257	}
	258	ret = snd_device_new(gosnd->card, SNDRV_DEV_LOWLEVEL, go,
	259	&go7007_snd_device_ops);
	260	if (ret < 0) {
	261	kfree(gosnd);
	262	return ret;
	263	}
	264	snd_card_set_dev(gosnd->card, go->dev);
	265	ret = snd_pcm_new(gosnd->card, "go7007", 0, 0, 1, &gosnd->pcm);
	266	if (ret < 0) {
	267	snd_card_free(gosnd->card);
	268	kfree(gosnd);
	269	return ret;
	270	}
	271	strncpy(gosnd->card->driver, "go7007", sizeof(gosnd->card->driver));
	272	strncpy(gosnd->card->shortname, go->name, sizeof(gosnd->card->driver));
	273	strncpy(gosnd->card->longname, gosnd->card->shortname,
	274	sizeof(gosnd->card->longname));
	275
	276	gosnd->pcm->private_data = go;
	277	snd_pcm_set_ops(gosnd->pcm, SNDRV_PCM_STREAM_CAPTURE,
	278	&go7007_snd_capture_ops);
	279
	280	ret = snd_card_register(gosnd->card);
	281	if (ret < 0) {
	282	snd_card_free(gosnd->card);
	283	kfree(gosnd);
	284	return ret;
	285	}
	286
	287	gosnd->substream = NULL;
	288	go->snd_context = gosnd;
	289	++dev;
	290	++go->ref_count;
	291
	292	return 0;
	293	}
	294	EXPORT_SYMBOL(go7007_snd_init);
	295
	296	int go7007_snd_remove(struct go7007 *go)
	297	{
	298	struct go7007_snd *gosnd = go->snd_context;
	299
	300	snd_card_disconnect(gosnd->card);
	301	snd_card_free_when_closed(gosnd->card);
	302	return 0;
	303	}
	304	EXPORT_SYMBOL(go7007_snd_remove);
	305
	306	MODULE_LICENSE("GPL v2");