--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff