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/*
* harmony.c - Harmony machine ASoC driver
*
* Author: Stephen Warren <swarren@nvidia.com>
* Copyright (C) 2010 - NVIDIA, Inc.
*
* Based on code copyright/by:
*
* (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
*
* Copyright 2007 Wolfson Microelectronics PLC.
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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 <asm/mach-types.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include "tegra_das.h"
#include "tegra_i2s.h"
#include "tegra_pcm.h"
#include "tegra_asoc_utils.h"
#define PREFIX "ASoC Harmony: "
static struct platform_device *harmony_snd_device;
static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int srate, mclk, mclk_change;
int err;
srate = params_rate(params);
switch (srate) {
case 64000:
case 88200:
case 96000:
mclk = 128 * srate;
break;
default:
mclk = 256 * srate;
break;
}
/* FIXME: Codec only requires >= 3MHz if OSR==0 */
while (mclk < 6000000)
mclk *= 2;
err = tegra_asoc_utils_set_rate(srate, mclk, &mclk_change);
if (err < 0) {
pr_err(PREFIX "Can't configure clocks\n");
return err;
}
err = snd_soc_dai_set_fmt(codec_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (err < 0) {
pr_err(PREFIX "codec_dai fmt not set\n");
return err;
}
err = snd_soc_dai_set_fmt(cpu_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
if (err < 0) {
pr_err(PREFIX "cpu_dai fmt not set\n");
return err;
}
if (mclk_change) {
err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);
if (err < 0) {
pr_err(PREFIX "codec_dai clock not set\n");
return err;
}
}
return 0;
}
static struct snd_soc_ops harmony_asoc_ops = {
.hw_params = harmony_asoc_hw_params,
};
static struct snd_soc_dai_link harmony_wm8903_dai = {
.name = "WM8903",
.stream_name = "WM8903 PCM",
.codec_name = "wm8903-codec.0-001a",
.platform_name = "tegra-pcm-audio",
.cpu_dai_name = "tegra-i2s.0",
.codec_dai_name = "wm8903-hifi",
.ops = &harmony_asoc_ops,
};
static struct snd_soc_card snd_soc_harmony = {
.name = "tegra-harmony",
.dai_link = &harmony_wm8903_dai,
.num_links = 1,
};
static int __init harmony_soc_modinit(void)
{
int ret;
if (!machine_is_harmony()) {
pr_err(PREFIX "Not running on Tegra Harmony!\n");
return -ENODEV;
}
ret = tegra_asoc_utils_init();
if (ret) {
return ret;
}
/*
* Create and register platform device
*/
harmony_snd_device = platform_device_alloc("soc-audio", -1);
if (harmony_snd_device == NULL) {
pr_err(PREFIX "platform_device_alloc failed\n");
ret = -ENOMEM;
goto err_clock_utils;
}
platform_set_drvdata(harmony_snd_device, &snd_soc_harmony);
ret = platform_device_add(harmony_snd_device);
if (ret) {
pr_err(PREFIX "platform_device_add failed (%d)\n",
ret);
goto err_device_put;
}
return 0;
err_device_put:
platform_device_put(harmony_snd_device);
err_clock_utils:
tegra_asoc_utils_fini();
return ret;
}
module_init(harmony_soc_modinit);
static void __exit harmony_soc_modexit(void)
{
platform_device_unregister(harmony_snd_device);
tegra_asoc_utils_fini();
}
module_exit(harmony_soc_modexit);
MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
MODULE_DESCRIPTION("Harmony machine ASoC driver");
MODULE_LICENSE("GPL");
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