ASoC: tegra: Harmony machine support
Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Stephen Warren
Mark Brown
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/*
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* harmony.c - Harmony machine ASoC driver
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*
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* Author: Stephen Warren <swarren@nvidia.com>
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* Copyright (C) 2010 - NVIDIA, Inc.
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*
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* Based on code copyright/by:
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*
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* (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
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*
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* Copyright 2007 Wolfson Microelectronics PLC.
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* Author: Graeme Gregory
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* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <asm/mach-types.h>
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#include <linux/module.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include "tegra_das.h"
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#include "tegra_i2s.h"
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#include "tegra_pcm.h"
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#include "tegra_asoc_utils.h"
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#define PREFIX "ASoC Harmony: "
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static struct platform_device *harmony_snd_device;
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static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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int srate, mclk, mclk_change;
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int err;
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srate = params_rate(params);
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switch (srate) {
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case 64000:
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case 88200:
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case 96000:
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mclk = 128 * srate;
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break;
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default:
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mclk = 256 * srate;
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break;
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}
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/* FIXME: Codec only requires >= 3MHz if OSR==0 */
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while (mclk < 6000000)
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mclk *= 2;
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err = tegra_asoc_utils_set_rate(srate, mclk, &mclk_change);
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if (err < 0) {
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pr_err(PREFIX "Can't configure clocks\n");
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return err;
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}
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err = snd_soc_dai_set_fmt(codec_dai,
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SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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if (err < 0) {
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pr_err(PREFIX "codec_dai fmt not set\n");
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return err;
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}
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err = snd_soc_dai_set_fmt(cpu_dai,
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SND_SOC_DAIFMT_I2S |
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SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS);
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if (err < 0) {
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pr_err(PREFIX "cpu_dai fmt not set\n");
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return err;
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}
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if (mclk_change) {
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err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk, SND_SOC_CLOCK_IN);
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if (err < 0) {
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pr_err(PREFIX "codec_dai clock not set\n");
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return err;
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}
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}
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return 0;
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}
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static struct snd_soc_ops harmony_asoc_ops = {
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.hw_params = harmony_asoc_hw_params,
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};
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static struct snd_soc_dai_link harmony_wm8903_dai = {
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.name = "WM8903",
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.stream_name = "WM8903 PCM",
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.codec_name = "wm8903-codec.0-001a",
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.platform_name = "tegra-pcm-audio",
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.cpu_dai_name = "tegra-i2s.0",
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.codec_dai_name = "wm8903-hifi",
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.ops = &harmony_asoc_ops,
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};
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static struct snd_soc_card snd_soc_harmony = {
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.name = "tegra-harmony",
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.dai_link = &harmony_wm8903_dai,
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.num_links = 1,
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};
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static int __init harmony_soc_modinit(void)
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{
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int ret;
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if (!machine_is_harmony()) {
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pr_err(PREFIX "Not running on Tegra Harmony!\n");
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return -ENODEV;
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}
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ret = tegra_asoc_utils_init();
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if (ret) {
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return ret;
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}
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/*
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* Create and register platform device
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*/
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harmony_snd_device = platform_device_alloc("soc-audio", -1);
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if (harmony_snd_device == NULL) {
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pr_err(PREFIX "platform_device_alloc failed\n");
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ret = -ENOMEM;
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goto err_clock_utils;
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}
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platform_set_drvdata(harmony_snd_device, &snd_soc_harmony);
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ret = platform_device_add(harmony_snd_device);
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if (ret) {
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pr_err(PREFIX "platform_device_add failed (%d)\n",
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ret);
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goto err_device_put;
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}
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return 0;
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err_device_put:
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platform_device_put(harmony_snd_device);
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err_clock_utils:
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tegra_asoc_utils_fini();
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return ret;
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}
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module_init(harmony_soc_modinit);
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static void __exit harmony_soc_modexit(void)
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{
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platform_device_unregister(harmony_snd_device);
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tegra_asoc_utils_fini();
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}
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module_exit(harmony_soc_modexit);
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MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
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MODULE_DESCRIPTION("Harmony machine ASoC driver");
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MODULE_LICENSE("GPL");
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