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