diff options
Diffstat (limited to 'sound/soc/tegra/harmony.c')
| -rw-r--r-- | sound/soc/tegra/harmony.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/sound/soc/tegra/harmony.c b/sound/soc/tegra/harmony.c new file mode 100644 index 00000000000..b160b7113f4 --- /dev/null +++ b/sound/soc/tegra/harmony.c @@ -0,0 +1,210 @@ +/* + * 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 const struct snd_soc_dapm_widget harmony_dapm_widgets[] = { + SND_SOC_DAPM_HP("Headphone Jack", NULL), + SND_SOC_DAPM_MIC("Mic Jack", NULL), +}; + +static const struct snd_soc_dapm_route harmony_audio_map[] = { + {"Headphone Jack", NULL, "HPOUTR"}, + {"Headphone Jack", NULL, "HPOUTL"}, + {"Mic Bias", NULL, "Mic Jack"}, + {"IN1L", NULL, "Mic Bias"}, +}; + +static int harmony_asoc_init(struct snd_soc_pcm_runtime *rtd) +{ + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_dapm_context *dapm = &codec->dapm; + + snd_soc_dapm_new_controls(dapm, harmony_dapm_widgets, + ARRAY_SIZE(harmony_dapm_widgets)); + + snd_soc_dapm_add_routes(dapm, harmony_audio_map, + ARRAY_SIZE(harmony_audio_map)); + + snd_soc_dapm_enable_pin(dapm, "Headphone Jack"); + snd_soc_dapm_enable_pin(dapm, "Mic Jack"); + snd_soc_dapm_sync(dapm); + + return 0; +} + +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", + .init = harmony_asoc_init, + .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"); |