/*
* omap-mcpdm.c -- OMAP ALSA SoC DAI driver using McPDM port
*
* Copyright (C) 2009 Texas Instruments
*
* Author: Misael Lopez Cruz <x0052729@ti.com>
* Contact: Jorge Eduardo Candelaria <x0107209@ti.com>
* Margarita Olaya <magi.olaya@ti.com>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <plat/control.h>
#include <plat/dma.h>
#include <plat/mcbsp.h>
#include "mcpdm.h"
#include "omap-mcpdm.h"
#include "omap-pcm.h"
struct omap_mcpdm_data {
struct omap_mcpdm_link *links;
int active;
};
static struct omap_mcpdm_link omap_mcpdm_links[] = {
/* downlink */
{
.irq_mask = MCPDM_DN_IRQ_EMPTY | MCPDM_DN_IRQ_FULL,
.threshold = 1,
.format = PDMOUTFORMAT_LJUST,
},
/* uplink */
{
.irq_mask = MCPDM_UP_IRQ_EMPTY | MCPDM_UP_IRQ_FULL,
.threshold = 1,
.format = PDMOUTFORMAT_LJUST,
},
};
static struct omap_mcpdm_data mcpdm_data = {
.links = omap_mcpdm_links,
.active = 0,
};
/*
* Stream DMA parameters
*/
static struct omap_pcm_dma_data omap_mcpdm_dai_dma_params[] = {
{
.name = "Audio playback",
.dma_req = OMAP44XX_DMA_MCPDM_DL,
.data_type = OMAP_DMA_DATA_TYPE_S32,
.sync_mode = OMAP_DMA_SYNC_PACKET,
.packet_size = 16,
.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_DN_DATA,
},
{
.name = "Audio capture",
.dma_req = OMAP44XX_DMA_MCPDM_UP,
.data_type = OMAP_DMA_DATA_TYPE_S32,
.sync_mode = OMAP_DMA_SYNC_PACKET,
.packet_size = 16,
.port_addr = OMAP44XX_MCPDM_L3_BASE + MCPDM_UP_DATA,
},
};
static int omap_mcpdm_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int err = 0;
if (!cpu_dai->active)
err = omap_mcpdm_request();
return err;
}
static void omap_mcpdm_dai_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
if (!cpu_dai->active)
omap_mcpdm_free();
}
static int omap_mcpdm_dai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
int stream = substream->stream;
int err = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (!mcpdm_priv->active++)
omap_mcpdm_start(stream);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (!--mcpdm_priv->active)
omap_mcpdm_stop(stream);
break;
default:
err = -EINVAL;
}
return err;
}
static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
int stream = substream->stream;
int channels, err, link_mask = 0;
cpu_dai->dma_data = &omap_mcpdm_dai_dma_params[stream];
channels = params_channels(params);
switch (channels) {
case 4:
if (stream == SNDRV_PCM_STREAM_CAPTURE)
/* up to 2 channels for capture */
return -EINVAL;
link_mask |= 1 << 3;
case 3:
if (stream == SNDRV_PCM_STREAM_CAPTURE)
/* up to 2 channels for capture */
return -EINVAL;
link_mask |= 1 << 2;
case 2:
link_mask |= 1 << 1;
case 1:
link_mask |= 1 << 0;
break;
default:
/* unsupported number of channels */
return -EINVAL;
}
if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
mcpdm_links[stream].channels = link_mask << 3;
err = omap_mcpdm_playback_open(&mcpdm_links[stream]);
} else {
mcpdm_links[stream].channels = link_mask << 0;
err = omap_mcpdm_capture_open(&mcpdm_links[stream]);
}
return err;
}
static int omap_mcpdm_dai_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
struct omap_mcpdm_data *mcpdm_priv = cpu_dai->private_data;
struct omap_mcpdm_link *mcpdm_links = mcpdm_priv->links;
int stream = substream->stream;
int err;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
err = omap_mcpdm_playback_close(&mcpdm_links[stream]);
else
err = omap_mcpdm_capture_close(&mcpdm_links[stream]);
return err;
}
static struct snd_soc_dai_ops omap_mcpdm_dai_ops = {
.startup = omap_mcpdm_dai_startup,
.shutdown = omap_mcpdm_dai_shutdown,
.trigger = omap_mcpdm_dai_trigger,
.hw_params = omap_mcpdm_dai_hw_params,
.hw_free = omap_mcpdm_dai_hw_free,
};
#define OMAP_MCPDM_RATES (SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
#define OMAP_MCPDM_FORMATS (SNDRV_PCM_FMTBIT_S32_LE)
struct snd_soc_dai omap_mcpdm_dai = {
.name = "omap-mcpdm",
.id = -1,
.playback = {
.channels_min = 1,
.channels_max = 4,
.rates = OMAP_MCPDM_RATES,
.formats = OMAP_MCPDM_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = OMAP_MCPDM_RATES,
.formats = OMAP_MCPDM_FORMATS,
},
.ops = &omap_mcpdm_dai_ops,
.private_data = &mcpdm_data,
};
EXPORT_SYMBOL_GPL(omap_mcpdm_dai);
static int __init snd_omap_mcpdm_init(void)
{
return snd_soc_register_dai(&omap_mcpdm_dai);
}
module_init(snd_omap_mcpdm_init);
static void __exit snd_omap_mcpdm_exit(void)
{
snd_soc_unregister_dai(&omap_mcpdm_dai);
}
module_exit(snd_omap_mcpdm_exit);
MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
MODULE_DESCRIPTION("OMAP PDM SoC Interface");
MODULE_LICENSE("GPL");
