[linux-block.git] / drivers / media / pci / solo6x10 / solo6x10-g723.c

/*
 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
 *
 * Original author:
 * Ben Collins <bcollins@ubuntu.com>
 *
 * Additional work by:
 * John Brooks <john.brooks@bluecherry.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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/mempool.h>
#include <linux/poll.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/module.h>
#include <linux/slab.h>

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/control.h>

#include "solo6x10.h"
#include "solo6x10-tw28.h"

#define G723_FDMA_PAGES		32
#define G723_PERIOD_BYTES	48
#define G723_PERIOD_BLOCK	1024
#define G723_FRAMES_PER_PAGE	48

/* Sets up channels 16-19 for decoding and 0-15 for encoding */
#define OUTMODE_MASK		0x300

#define SAMPLERATE		8000
#define BITRATE			25

/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
 * is broken down to 20 * 48 byte regions (one for each channel possible)
 * with the rest of the page being dummy data. */
#define PERIODS			G723_FDMA_PAGES
#define G723_INTR_ORDER		4 /* 0 - 4 */

struct solo_snd_pcm {
	int				on;
	spinlock_t			lock;
	struct solo_dev			*solo_dev;
	u8				*g723_buf;
	dma_addr_t			g723_dma;
};

static void solo_g723_config(struct solo_dev *solo_dev)
{
	int clk_div;

	clk_div = (solo_dev->clock_mhz * 1000000)
		/ (SAMPLERATE * (BITRATE * 2) * 2);

	solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
		       SOLO_AUDIO_BITRATE(BITRATE)
		       | SOLO_AUDIO_CLK_DIV(clk_div));

	solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
		       SOLO_AUDIO_FDMA_INTERVAL(1)
		       | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
		       | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));

	solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
		       SOLO_AUDIO_ENABLE
		       | SOLO_AUDIO_I2S_MODE
		       | SOLO_AUDIO_I2S_MULTI(3)
		       | SOLO_AUDIO_MODE(OUTMODE_MASK));
}

void solo_g723_isr(struct solo_dev *solo_dev)
{
	struct snd_pcm_str *pstr =
		&solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
	struct snd_pcm_substream *ss;
	struct solo_snd_pcm *solo_pcm;

	for (ss = pstr->substream; ss != NULL; ss = ss->next) {
		if (snd_pcm_substream_chip(ss) == NULL)
			continue;

		/* This means open() hasn't been called on this one */
		if (snd_pcm_substream_chip(ss) == solo_dev)
			continue;

		/* Haven't triggered a start yet */
		solo_pcm = snd_pcm_substream_chip(ss);
		if (!solo_pcm->on)
			continue;

		snd_pcm_period_elapsed(ss);
	}
}

static int snd_solo_hw_params(struct snd_pcm_substream *ss,
			      struct snd_pcm_hw_params *hw_params)
{
	return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
}

static int snd_solo_hw_free(struct snd_pcm_substream *ss)
{
	return snd_pcm_lib_free_pages(ss);
}

static const struct snd_pcm_hardware snd_solo_pcm_hw = {
	.info			= (SNDRV_PCM_INFO_MMAP |
				   SNDRV_PCM_INFO_INTERLEAVED |
				   SNDRV_PCM_INFO_BLOCK_TRANSFER |
				   SNDRV_PCM_INFO_MMAP_VALID),
	.formats		= SNDRV_PCM_FMTBIT_U8,
	.rates			= SNDRV_PCM_RATE_8000,
	.rate_min		= SAMPLERATE,
	.rate_max		= SAMPLERATE,
	.channels_min		= 1,
	.channels_max		= 1,
	.buffer_bytes_max	= G723_PERIOD_BYTES * PERIODS,
	.period_bytes_min	= G723_PERIOD_BYTES,
	.period_bytes_max	= G723_PERIOD_BYTES,
	.periods_min		= PERIODS,
	.periods_max		= PERIODS,
};

static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
{
	struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
	struct solo_snd_pcm *solo_pcm;

	solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
	if (solo_pcm == NULL)
		goto oom;

	solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
						  G723_PERIOD_BYTES,
						  &solo_pcm->g723_dma);
	if (solo_pcm->g723_buf == NULL)
		goto oom;

	spin_lock_init(&solo_pcm->lock);
	solo_pcm->solo_dev = solo_dev;
	ss->runtime->hw = snd_solo_pcm_hw;

	snd_pcm_substream_chip(ss) = solo_pcm;

	return 0;

oom:
	kfree(solo_pcm);
	return -ENOMEM;
}

static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
{
	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);

	snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
	pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
			    solo_pcm->g723_buf, solo_pcm->g723_dma);
	kfree(solo_pcm);

	return 0;
}

static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
{
	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	struct solo_dev *solo_dev = solo_pcm->solo_dev;
	int ret = 0;

	spin_lock(&solo_pcm->lock);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		if (solo_pcm->on == 0) {
			/* If this is the first user, switch on interrupts */
			if (atomic_inc_return(&solo_dev->snd_users) == 1)
				solo_irq_on(solo_dev, SOLO_IRQ_G723);
			solo_pcm->on = 1;
		}
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		if (solo_pcm->on) {
			/* If this was our last user, switch them off */
			if (atomic_dec_return(&solo_dev->snd_users) == 0)
				solo_irq_off(solo_dev, SOLO_IRQ_G723);
			solo_pcm->on = 0;
		}
		break;
	default:
		ret = -EINVAL;
	}

	spin_unlock(&solo_pcm->lock);

	return ret;
}

static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
{
	return 0;
}

static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
{
	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	struct solo_dev *solo_dev = solo_pcm->solo_dev;
	snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;

	return idx * G723_FRAMES_PER_PAGE;
}

static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel,
				  unsigned long pos, void __user *dst,
				  unsigned long count)
{
	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	struct solo_dev *solo_dev = solo_pcm->solo_dev;
	int err, i;

	for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
		int page = (pos / G723_FRAMES_PER_PAGE) + i;

		err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
				     SOLO_G723_EXT_ADDR(solo_dev) +
				     (page * G723_PERIOD_BLOCK) +
				     (ss->number * G723_PERIOD_BYTES),
				     G723_PERIOD_BYTES, 0, 0);
		if (err)
			return err;

		if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES))
			return -EFAULT;
		dst += G723_PERIOD_BYTES;
	}

	return 0;
}

static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel,
				    unsigned long pos, void *dst,
				    unsigned long count)
{
	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	struct solo_dev *solo_dev = solo_pcm->solo_dev;
	int err, i;

	for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
		int page = (pos / G723_FRAMES_PER_PAGE) + i;

		err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
				     SOLO_G723_EXT_ADDR(solo_dev) +
				     (page * G723_PERIOD_BLOCK) +
				     (ss->number * G723_PERIOD_BYTES),
				     G723_PERIOD_BYTES, 0, 0);
		if (err)
			return err;

		memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES);
		dst += G723_PERIOD_BYTES;
	}

	return 0;
}

static const struct snd_pcm_ops snd_solo_pcm_ops = {
	.open = snd_solo_pcm_open,
	.close = snd_solo_pcm_close,
	.ioctl = snd_pcm_lib_ioctl,
	.hw_params = snd_solo_hw_params,
	.hw_free = snd_solo_hw_free,
	.prepare = snd_solo_pcm_prepare,
	.trigger = snd_solo_pcm_trigger,
	.pointer = snd_solo_pcm_pointer,
	.copy_user = snd_solo_pcm_copy_user,
	.copy_kernel = snd_solo_pcm_copy_kernel,
};

static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
					struct snd_ctl_elem_info *info)
{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 1;
	info->value.integer.min = 0;
	info->value.integer.max = 15;
	info->value.integer.step = 1;

	return 0;
}

static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_value *value)
{
	struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
	u8 ch = value->id.numid - 1;

	value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);

	return 0;
}

static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
				       struct snd_ctl_elem_value *value)
{
	struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
	u8 ch = value->id.numid - 1;
	u8 old_val;

	old_val = tw28_get_audio_gain(solo_dev, ch);
	if (old_val == value->value.integer.value[0])
		return 0;

	tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);

	return 1;
}

static const struct snd_kcontrol_new snd_solo_capture_volume = {
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Capture Volume",
	.info = snd_solo_capture_volume_info,
	.get = snd_solo_capture_volume_get,
	.put = snd_solo_capture_volume_put,
};

static int solo_snd_pcm_init(struct solo_dev *solo_dev)
{
	struct snd_card *card = solo_dev->snd_card;
	struct snd_pcm *pcm;
	struct snd_pcm_substream *ss;
	int ret;
	int i;

	ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
			  &pcm);
	if (ret < 0)
		return ret;

	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
			&snd_solo_pcm_ops);

	snd_pcm_chip(pcm) = solo_dev;
	pcm->info_flags = 0;
	strscpy(pcm->name, card->shortname, sizeof(pcm->name));

	for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
	     ss; ss = ss->next, i++)
		sprintf(ss->name, "Camera #%d Audio", i);

	ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
					SNDRV_DMA_TYPE_CONTINUOUS,
					snd_dma_continuous_data(GFP_KERNEL),
					G723_PERIOD_BYTES * PERIODS,
					G723_PERIOD_BYTES * PERIODS);
	if (ret < 0)
		return ret;

	solo_dev->snd_pcm = pcm;

	return 0;
}

int solo_g723_init(struct solo_dev *solo_dev)
{
	static struct snd_device_ops ops = { };
	struct snd_card *card;
	struct snd_kcontrol_new kctl;
	char name[32];
	int ret;

	atomic_set(&solo_dev->snd_users, 0);

	/* Allows for easier mapping between video and audio */
	sprintf(name, "Softlogic%d", solo_dev->vfd->num);

	ret = snd_card_new(&solo_dev->pdev->dev,
			   SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
			   &solo_dev->snd_card);
	if (ret < 0)
		return ret;

	card = solo_dev->snd_card;

	strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver));
	strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname));
	sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
		pci_name(solo_dev->pdev), solo_dev->pdev->irq);

	ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
	if (ret < 0)
		goto snd_error;

	/* Mixer controls */
	strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername));
	kctl = snd_solo_capture_volume;
	kctl.count = solo_dev->nr_chans;

	ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
	if (ret < 0)
		return ret;

	ret = solo_snd_pcm_init(solo_dev);
	if (ret < 0)
		goto snd_error;

	ret = snd_card_register(card);
	if (ret < 0)
		goto snd_error;

	solo_g723_config(solo_dev);

	dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);

	return 0;

snd_error:
	snd_card_free(card);
	return ret;
}

void solo_g723_exit(struct solo_dev *solo_dev)
{
	if (!solo_dev->snd_card)
		return;

	solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
	solo_irq_off(solo_dev, SOLO_IRQ_G723);

	snd_card_free(solo_dev->snd_card);
	solo_dev->snd_card = NULL;
}
Commit	Line	Data
faa4fd2a	1	/*
dcae5dac HV	2	* Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
	3	*
	4	* Original author:
	5	* Ben Collins <bcollins@ubuntu.com>
	6	*
	7	* Additional work by:
	8	* John Brooks <john.brooks@bluecherry.net>
faa4fd2a BC	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
	12	* the Free Software Foundation; either version 2 of the License, or
	13	* (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
faa4fd2a BC	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/mempool.h>
	23	#include <linux/poll.h>
	24	#include <linux/kthread.h>
	25	#include <linux/freezer.h>
dcae5dac HV	26	#include <linux/module.h>
	27	#include <linux/slab.h>
	28
faa4fd2a BC	29	#include <sound/core.h>
	30	#include <sound/initval.h>
	31	#include <sound/pcm.h>
	32	#include <sound/control.h>
dcae5dac	33
ae69b22c	34	#include "solo6x10.h"
dad7fab9	35	#include "solo6x10-tw28.h"
faa4fd2a	36
faa4fd2a BC	37	#define G723_FDMA_PAGES 32
	38	#define G723_PERIOD_BYTES 48
	39	#define G723_PERIOD_BLOCK 1024
	40	#define G723_FRAMES_PER_PAGE 48
	41
	42	/* Sets up channels 16-19 for decoding and 0-15 for encoding */
	43	#define OUTMODE_MASK 0x300
	44
	45	#define SAMPLERATE 8000
	46	#define BITRATE 25
	47
	48	/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
	49	* is broken down to 20 * 48 byte regions (one for each channel possible)
	50	* with the rest of the page being dummy data. */
9d1b1f61	51	#define PERIODS G723_FDMA_PAGES
dcae5dac	52	#define G723_INTR_ORDER 4 /* 0 - 4 */
faa4fd2a BC	53
faa4fd2a BC	54	struct solo_snd_pcm {
dcae5dac HV	55	int on;
dcae5dac HV	56	spinlock_t lock;
8a4d9a9c IL	57	struct solo_dev *solo_dev;
8a4d9a9c IL	58	u8 *g723_buf;
dcae5dac	59	dma_addr_t g723_dma;
faa4fd2a BC	60	};
faa4fd2a BC	61
decebabf	62	static void solo_g723_config(struct solo_dev *solo_dev)
faa4fd2a BC	63	{
	64	int clk_div;
	65
dcae5dac HV	66	clk_div = (solo_dev->clock_mhz * 1000000)
dcae5dac HV	67	/ (SAMPLERATE * (BITRATE * 2) * 2);
faa4fd2a BC	68
faa4fd2a BC	69	solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
dcae5dac HV	70	SOLO_AUDIO_BITRATE(BITRATE)
dcae5dac HV	71	\| SOLO_AUDIO_CLK_DIV(clk_div));
faa4fd2a BC	72
faa4fd2a BC	73	solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
dcae5dac HV	74	SOLO_AUDIO_FDMA_INTERVAL(1)
	75	\| SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
	76	\| SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
faa4fd2a BC	77
faa4fd2a BC	78	solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
dcae5dac HV	79	SOLO_AUDIO_ENABLE
	80	\| SOLO_AUDIO_I2S_MODE
	81	\| SOLO_AUDIO_I2S_MULTI(3)
	82	\| SOLO_AUDIO_MODE(OUTMODE_MASK));
faa4fd2a BC	83	}
faa4fd2a BC	84
decebabf	85	void solo_g723_isr(struct solo_dev *solo_dev)
faa4fd2a BC	86	{
	87	struct snd_pcm_str *pstr =
	88	&solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
	89	struct snd_pcm_substream *ss;
	90	struct solo_snd_pcm *solo_pcm;
	91
faa4fd2a BC	92	for (ss = pstr->substream; ss != NULL; ss = ss->next) {
	93	if (snd_pcm_substream_chip(ss) == NULL)
	94	continue;
	95
	96	/* This means open() hasn't been called on this one */
	97	if (snd_pcm_substream_chip(ss) == solo_dev)
	98	continue;
	99
	100	/* Haven't triggered a start yet */
	101	solo_pcm = snd_pcm_substream_chip(ss);
	102	if (!solo_pcm->on)
	103	continue;
	104
	105	snd_pcm_period_elapsed(ss);
	106	}
	107	}
	108
	109	static int snd_solo_hw_params(struct snd_pcm_substream *ss,
	110	struct snd_pcm_hw_params *hw_params)
	111	{
	112	return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
	113	}
	114
	115	static int snd_solo_hw_free(struct snd_pcm_substream *ss)
	116	{
	117	return snd_pcm_lib_free_pages(ss);
	118	}
	119
dcae5dac	120	static const struct snd_pcm_hardware snd_solo_pcm_hw = {
faa4fd2a BC	121	.info = (SNDRV_PCM_INFO_MMAP \|
	122	SNDRV_PCM_INFO_INTERLEAVED \|
	123	SNDRV_PCM_INFO_BLOCK_TRANSFER \|
	124	SNDRV_PCM_INFO_MMAP_VALID),
	125	.formats = SNDRV_PCM_FMTBIT_U8,
	126	.rates = SNDRV_PCM_RATE_8000,
dcae5dac HV	127	.rate_min = SAMPLERATE,
dcae5dac HV	128	.rate_max = SAMPLERATE,
faa4fd2a BC	129	.channels_min = 1,
faa4fd2a BC	130	.channels_max = 1,
9d1b1f61	131	.buffer_bytes_max = G723_PERIOD_BYTES * PERIODS,
faa4fd2a BC	132	.period_bytes_min = G723_PERIOD_BYTES,
faa4fd2a BC	133	.period_bytes_max = G723_PERIOD_BYTES,
9d1b1f61 KH	134	.periods_min = PERIODS,
9d1b1f61 KH	135	.periods_max = PERIODS,
faa4fd2a BC	136	};
	137
	138	static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
	139	{
decebabf	140	struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
faa4fd2a BC	141	struct solo_snd_pcm *solo_pcm;
	142
	143	solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
	144	if (solo_pcm == NULL)
dcae5dac HV	145	goto oom;
	146
	147	solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
	148	G723_PERIOD_BYTES,
	149	&solo_pcm->g723_dma);
	150	if (solo_pcm->g723_buf == NULL)
	151	goto oom;
faa4fd2a BC	152
	153	spin_lock_init(&solo_pcm->lock);
	154	solo_pcm->solo_dev = solo_dev;
	155	ss->runtime->hw = snd_solo_pcm_hw;
	156
	157	snd_pcm_substream_chip(ss) = solo_pcm;
	158
	159	return 0;
dcae5dac HV	160
	161	oom:
	162	kfree(solo_pcm);
	163	return -ENOMEM;
faa4fd2a BC	164	}
	165
	166	static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
	167	{
	168	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	169
	170	snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
dcae5dac HV	171	pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
dcae5dac HV	172	solo_pcm->g723_buf, solo_pcm->g723_dma);
faa4fd2a BC	173	kfree(solo_pcm);
faa4fd2a BC	174
98e2d5a8	175	return 0;
faa4fd2a BC	176	}
	177
	178	static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
	179	{
	180	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
decebabf	181	struct solo_dev *solo_dev = solo_pcm->solo_dev;
faa4fd2a BC	182	int ret = 0;
	183
	184	spin_lock(&solo_pcm->lock);
	185
	186	switch (cmd) {
	187	case SNDRV_PCM_TRIGGER_START:
	188	if (solo_pcm->on == 0) {
	189	/* If this is the first user, switch on interrupts */
	190	if (atomic_inc_return(&solo_dev->snd_users) == 1)
decebabf	191	solo_irq_on(solo_dev, SOLO_IRQ_G723);
faa4fd2a BC	192	solo_pcm->on = 1;
	193	}
	194	break;
	195	case SNDRV_PCM_TRIGGER_STOP:
	196	if (solo_pcm->on) {
	197	/* If this was our last user, switch them off */
	198	if (atomic_dec_return(&solo_dev->snd_users) == 0)
decebabf	199	solo_irq_off(solo_dev, SOLO_IRQ_G723);
faa4fd2a BC	200	solo_pcm->on = 0;
	201	}
	202	break;
	203	default:
	204	ret = -EINVAL;
	205	}
	206
	207	spin_unlock(&solo_pcm->lock);
	208
	209	return ret;
	210	}
	211
	212	static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
	213	{
98e2d5a8	214	return 0;
faa4fd2a BC	215	}
	216
	217	static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
	218	{
	219	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
decebabf	220	struct solo_dev *solo_dev = solo_pcm->solo_dev;
faa4fd2a BC	221	snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
	222
	223	return idx * G723_FRAMES_PER_PAGE;
	224	}
	225
43e69758 MCC	226	static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel,
	227	unsigned long pos, void __user *dst,
	228	unsigned long count)
faa4fd2a BC	229	{
faa4fd2a BC	230	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
decebabf	231	struct solo_dev *solo_dev = solo_pcm->solo_dev;
faa4fd2a BC	232	int err, i;
	233
	234	for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
	235	int page = (pos / G723_FRAMES_PER_PAGE) + i;
	236
dcae5dac HV	237	err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
	238	SOLO_G723_EXT_ADDR(solo_dev) +
	239	(page * G723_PERIOD_BLOCK) +
	240	(ss->number * G723_PERIOD_BYTES),
	241	G723_PERIOD_BYTES, 0, 0);
faa4fd2a BC	242	if (err)
	243	return err;
	244
43e69758	245	if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES))
6a4ca039	246	return -EFAULT;
1facf21e	247	dst += G723_PERIOD_BYTES;
faa4fd2a BC	248	}
	249
	250	return 0;
	251	}
	252
1facf21e TI	253	static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel,
	254	unsigned long pos, void *dst,
	255	unsigned long count)
	256	{
43e69758 MCC	257	struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
	258	struct solo_dev *solo_dev = solo_pcm->solo_dev;
	259	int err, i;
	260
	261	for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
	262	int page = (pos / G723_FRAMES_PER_PAGE) + i;
	263
	264	err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
	265	SOLO_G723_EXT_ADDR(solo_dev) +
	266	(page * G723_PERIOD_BLOCK) +
	267	(ss->number * G723_PERIOD_BYTES),
	268	G723_PERIOD_BYTES, 0, 0);
	269	if (err)
	270	return err;
	271
	272	memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES);
	273	dst += G723_PERIOD_BYTES;
	274	}
	275
	276	return 0;
1facf21e TI	277	}
1facf21e TI	278
5c8d8c01	279	static const struct snd_pcm_ops snd_solo_pcm_ops = {
faa4fd2a BC	280	.open = snd_solo_pcm_open,
	281	.close = snd_solo_pcm_close,
	282	.ioctl = snd_pcm_lib_ioctl,
	283	.hw_params = snd_solo_hw_params,
	284	.hw_free = snd_solo_hw_free,
	285	.prepare = snd_solo_pcm_prepare,
	286	.trigger = snd_solo_pcm_trigger,
	287	.pointer = snd_solo_pcm_pointer,
1facf21e TI	288	.copy_user = snd_solo_pcm_copy_user,
1facf21e TI	289	.copy_kernel = snd_solo_pcm_copy_kernel,
faa4fd2a BC	290	};
	291
	292	static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
	293	struct snd_ctl_elem_info *info)
	294	{
	295	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	296	info->count = 1;
	297	info->value.integer.min = 0;
	298	info->value.integer.max = 15;
	299	info->value.integer.step = 1;
	300
	301	return 0;
	302	}
	303
	304	static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
	305	struct snd_ctl_elem_value *value)
	306	{
decebabf	307	struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
faa4fd2a BC	308	u8 ch = value->id.numid - 1;
	309
	310	value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
	311
98e2d5a8	312	return 0;
faa4fd2a BC	313	}
	314
	315	static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
	316	struct snd_ctl_elem_value *value)
	317	{
decebabf	318	struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
faa4fd2a	319	u8 ch = value->id.numid - 1;
98e2d5a8	320	u8 old_val;
faa4fd2a	321
98e2d5a8	322	old_val = tw28_get_audio_gain(solo_dev, ch);
faa4fd2a BC	323	if (old_val == value->value.integer.value[0])
	324	return 0;
	325
	326	tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
	327
98e2d5a8	328	return 1;
faa4fd2a BC	329	}
faa4fd2a BC	330
24a571d1	331	static const struct snd_kcontrol_new snd_solo_capture_volume = {
faa4fd2a BC	332	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	333	.name = "Capture Volume",
	334	.info = snd_solo_capture_volume_info,
	335	.get = snd_solo_capture_volume_get,
	336	.put = snd_solo_capture_volume_put,
	337	};
	338
decebabf	339	static int solo_snd_pcm_init(struct solo_dev *solo_dev)
faa4fd2a BC	340	{
	341	struct snd_card *card = solo_dev->snd_card;
	342	struct snd_pcm *pcm;
	343	struct snd_pcm_substream *ss;
	344	int ret;
	345	int i;
	346
	347	ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
	348	&pcm);
	349	if (ret < 0)
	350	return ret;
	351
	352	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
	353	&snd_solo_pcm_ops);
	354
	355	snd_pcm_chip(pcm) = solo_dev;
	356	pcm->info_flags = 0;
cc1e6315	357	strscpy(pcm->name, card->shortname, sizeof(pcm->name));
faa4fd2a BC	358
	359	for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
	360	ss; ss = ss->next, i++)
	361	sprintf(ss->name, "Camera #%d Audio", i);
	362
	363	ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
	364	SNDRV_DMA_TYPE_CONTINUOUS,
	365	snd_dma_continuous_data(GFP_KERNEL),
9d1b1f61 KH	366	G723_PERIOD_BYTES * PERIODS,
9d1b1f61 KH	367	G723_PERIOD_BYTES * PERIODS);
faa4fd2a BC	368	if (ret < 0)
	369	return ret;
	370
	371	solo_dev->snd_pcm = pcm;
	372
	373	return 0;
	374	}
	375
decebabf	376	int solo_g723_init(struct solo_dev *solo_dev)
faa4fd2a	377	{
c4d27f4b	378	static struct snd_device_ops ops = { };
faa4fd2a BC	379	struct snd_card *card;
	380	struct snd_kcontrol_new kctl;
	381	char name[32];
	382	int ret;
	383
	384	atomic_set(&solo_dev->snd_users, 0);
	385
	386	/* Allows for easier mapping between video and audio */
	387	sprintf(name, "Softlogic%d", solo_dev->vfd->num);
	388
3a3d2afd TI	389	ret = snd_card_new(&solo_dev->pdev->dev,
	390	SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
	391	&solo_dev->snd_card);
faa4fd2a BC	392	if (ret < 0)
	393	return ret;
	394
	395	card = solo_dev->snd_card;
	396
cc1e6315 MCC	397	strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver));
cc1e6315 MCC	398	strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname));
faa4fd2a BC	399	sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
faa4fd2a BC	400	pci_name(solo_dev->pdev), solo_dev->pdev->irq);
faa4fd2a BC	401
	402	ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
	403	if (ret < 0)
	404	goto snd_error;
	405
	406	/* Mixer controls */
cc1e6315	407	strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername));
faa4fd2a BC	408	kctl = snd_solo_capture_volume;
faa4fd2a BC	409	kctl.count = solo_dev->nr_chans;
dcae5dac	410
98e2d5a8	411	ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
faa4fd2a BC	412	if (ret < 0)
	413	return ret;
	414
afabbe6d	415	ret = solo_snd_pcm_init(solo_dev);
afabbe6d	416	if (ret < 0)
faa4fd2a BC	417	goto snd_error;
faa4fd2a BC	418
afabbe6d	419	ret = snd_card_register(card);
afabbe6d	420	if (ret < 0)
faa4fd2a BC	421	goto snd_error;
	422
	423	solo_g723_config(solo_dev);
	424
	425	dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
	426
	427	return 0;
	428
	429	snd_error:
	430	snd_card_free(card);
	431	return ret;
	432	}
	433
decebabf	434	void solo_g723_exit(struct solo_dev *solo_dev)
faa4fd2a	435	{
dcae5dac HV	436	if (!solo_dev->snd_card)
	437	return;
	438
faa4fd2a	439	solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
decebabf	440	solo_irq_off(solo_dev, SOLO_IRQ_G723);
faa4fd2a BC	441
faa4fd2a BC	442	snd_card_free(solo_dev->snd_card);
dcae5dac	443	solo_dev->snd_card = NULL;
faa4fd2a	444	}