diff options
Diffstat (limited to 'sound/soc/codecs/si476x.c')
| -rw-r--r-- | sound/soc/codecs/si476x.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/sound/soc/codecs/si476x.c b/sound/soc/codecs/si476x.c new file mode 100644 index 000000000..3e7296428 --- /dev/null +++ b/sound/soc/codecs/si476x.c @@ -0,0 +1,272 @@ +/* + * sound/soc/codecs/si476x.c -- Codec driver for SI476X chips + * + * Copyright (C) 2012 Innovative Converged Devices(ICD) + * Copyright (C) 2013 Andrey Smirnov + * + * Author: Andrey Smirnov <andrew.smirnov@gmail.com> + * + * 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; version 2 of the License. + * + * 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/module.h> +#include <linux/slab.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <linux/regmap.h> +#include <sound/soc.h> +#include <sound/initval.h> + +#include <linux/i2c.h> + +#include <linux/mfd/si476x-core.h> + +enum si476x_audio_registers { + SI476X_DIGITAL_IO_OUTPUT_FORMAT = 0x0203, + SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE = 0x0202, +}; + +enum si476x_digital_io_output_format { + SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT = 11, + SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT = 8, +}; + +#define SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK ((0x7 << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | \ + (0x7 << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)) +#define SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK (0x7e) + +enum si476x_daudio_formats { + SI476X_DAUDIO_MODE_I2S = (0x0 << 1), + SI476X_DAUDIO_MODE_DSP_A = (0x6 << 1), + SI476X_DAUDIO_MODE_DSP_B = (0x7 << 1), + SI476X_DAUDIO_MODE_LEFT_J = (0x8 << 1), + SI476X_DAUDIO_MODE_RIGHT_J = (0x9 << 1), + + SI476X_DAUDIO_MODE_IB = (1 << 5), + SI476X_DAUDIO_MODE_IF = (1 << 6), +}; + +enum si476x_pcm_format { + SI476X_PCM_FORMAT_S8 = 2, + SI476X_PCM_FORMAT_S16_LE = 4, + SI476X_PCM_FORMAT_S20_3LE = 5, + SI476X_PCM_FORMAT_S24_LE = 6, +}; + +static const struct snd_soc_dapm_widget si476x_dapm_widgets[] = { +SND_SOC_DAPM_OUTPUT("LOUT"), +SND_SOC_DAPM_OUTPUT("ROUT"), +}; + +static const struct snd_soc_dapm_route si476x_dapm_routes[] = { + { "Capture", NULL, "LOUT" }, + { "Capture", NULL, "ROUT" }, +}; + +static int si476x_codec_set_dai_fmt(struct snd_soc_dai *codec_dai, + unsigned int fmt) +{ + struct si476x_core *core = i2c_mfd_cell_to_core(codec_dai->dev); + int err; + u16 format = 0; + + if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS) + return -EINVAL; + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_DSP_A: + format |= SI476X_DAUDIO_MODE_DSP_A; + break; + case SND_SOC_DAIFMT_DSP_B: + format |= SI476X_DAUDIO_MODE_DSP_B; + break; + case SND_SOC_DAIFMT_I2S: + format |= SI476X_DAUDIO_MODE_I2S; + break; + case SND_SOC_DAIFMT_RIGHT_J: + format |= SI476X_DAUDIO_MODE_RIGHT_J; + break; + case SND_SOC_DAIFMT_LEFT_J: + format |= SI476X_DAUDIO_MODE_LEFT_J; + break; + default: + return -EINVAL; + } + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_DSP_A: + case SND_SOC_DAIFMT_DSP_B: + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_IB_NF: + format |= SI476X_DAUDIO_MODE_IB; + break; + default: + return -EINVAL; + } + break; + case SND_SOC_DAIFMT_I2S: + case SND_SOC_DAIFMT_RIGHT_J: + case SND_SOC_DAIFMT_LEFT_J: + switch (fmt & SND_SOC_DAIFMT_INV_MASK) { + case SND_SOC_DAIFMT_NB_NF: + break; + case SND_SOC_DAIFMT_IB_IF: + format |= SI476X_DAUDIO_MODE_IB | + SI476X_DAUDIO_MODE_IF; + break; + case SND_SOC_DAIFMT_IB_NF: + format |= SI476X_DAUDIO_MODE_IB; + break; + case SND_SOC_DAIFMT_NB_IF: + format |= SI476X_DAUDIO_MODE_IF; + break; + default: + return -EINVAL; + } + break; + default: + return -EINVAL; + } + + si476x_core_lock(core); + + err = snd_soc_update_bits(codec_dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, + SI476X_DIGITAL_IO_OUTPUT_FORMAT_MASK, + format); + + si476x_core_unlock(core); + + if (err < 0) { + dev_err(codec_dai->codec->dev, "Failed to set output format\n"); + return err; + } + + return 0; +} + +static int si476x_codec_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct si476x_core *core = i2c_mfd_cell_to_core(dai->dev); + int rate, width, err; + + rate = params_rate(params); + if (rate < 32000 || rate > 48000) { + dev_err(dai->codec->dev, "Rate: %d is not supported\n", rate); + return -EINVAL; + } + + switch (params_width(params)) { + case 8: + width = SI476X_PCM_FORMAT_S8; + break; + case 16: + width = SI476X_PCM_FORMAT_S16_LE; + break; + case 20: + width = SI476X_PCM_FORMAT_S20_3LE; + break; + case 24: + width = SI476X_PCM_FORMAT_S24_LE; + break; + default: + return -EINVAL; + } + + si476x_core_lock(core); + + err = snd_soc_write(dai->codec, SI476X_DIGITAL_IO_OUTPUT_SAMPLE_RATE, + rate); + if (err < 0) { + dev_err(dai->codec->dev, "Failed to set sample rate\n"); + goto out; + } + + err = snd_soc_update_bits(dai->codec, SI476X_DIGITAL_IO_OUTPUT_FORMAT, + SI476X_DIGITAL_IO_OUTPUT_WIDTH_MASK, + (width << SI476X_DIGITAL_IO_SLOT_SIZE_SHIFT) | + (width << SI476X_DIGITAL_IO_SAMPLE_SIZE_SHIFT)); + if (err < 0) { + dev_err(dai->codec->dev, "Failed to set output width\n"); + goto out; + } + +out: + si476x_core_unlock(core); + + return err; +} + +static struct snd_soc_dai_ops si476x_dai_ops = { + .hw_params = si476x_codec_hw_params, + .set_fmt = si476x_codec_set_dai_fmt, +}; + +static struct snd_soc_dai_driver si476x_dai = { + .name = "si476x-codec", + .capture = { + .stream_name = "Capture", + .channels_min = 2, + .channels_max = 2, + + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S8 | + SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S20_3LE | + SNDRV_PCM_FMTBIT_S24_LE + }, + .ops = &si476x_dai_ops, +}; + +static struct regmap *si476x_get_regmap(struct device *dev) +{ + return dev_get_regmap(dev->parent, NULL); +} + +static struct snd_soc_codec_driver soc_codec_dev_si476x = { + .get_regmap = si476x_get_regmap, + .dapm_widgets = si476x_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(si476x_dapm_widgets), + .dapm_routes = si476x_dapm_routes, + .num_dapm_routes = ARRAY_SIZE(si476x_dapm_routes), +}; + +static int si476x_platform_probe(struct platform_device *pdev) +{ + return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_si476x, + &si476x_dai, 1); +} + +static int si476x_platform_remove(struct platform_device *pdev) +{ + snd_soc_unregister_codec(&pdev->dev); + return 0; +} + +MODULE_ALIAS("platform:si476x-codec"); + +static struct platform_driver si476x_platform_driver = { + .driver = { + .name = "si476x-codec", + }, + .probe = si476x_platform_probe, + .remove = si476x_platform_remove, +}; +module_platform_driver(si476x_platform_driver); + +MODULE_AUTHOR("Andrey Smirnov <andrew.smirnov@gmail.com>"); +MODULE_DESCRIPTION("ASoC Si4761/64 codec driver"); +MODULE_LICENSE("GPL"); |