// SPDX-License-Identifier: GPL-2.0
//
// Lochnagar sound card driver
//
// Copyright (c) 2017-2019 Cirrus Logic, Inc. and
// Cirrus Logic International Semiconductor Ltd.
//
// Author: Charles Keepax <[email protected]>
// Piotr Stankiewicz <[email protected]>
#include <linux/clk.h>
#include <linux/module.h>
#include <sound/soc.h>
#include <linux/mfd/lochnagar.h>
#include <linux/mfd/lochnagar1_regs.h>
#include <linux/mfd/lochnagar2_regs.h>
struct lochnagar_sc_priv {
struct clk *mclk;
};
static const struct snd_soc_dapm_widget lochnagar_sc_widgets[] = {
SND_SOC_DAPM_LINE("Line Jack", NULL),
SND_SOC_DAPM_LINE("USB Audio", NULL),
};
static const struct snd_soc_dapm_route lochnagar_sc_routes[] = {
{ "Line Jack", NULL, "AIF1 Playback" },
{ "AIF1 Capture", NULL, "Line Jack" },
{ "USB Audio", NULL, "USB1 Playback" },
{ "USB Audio", NULL, "USB2 Playback" },
{ "USB1 Capture", NULL, "USB Audio" },
{ "USB2 Capture", NULL, "USB Audio" },
};
static const unsigned int lochnagar_sc_chan_vals[] = {
4, 8,
};
static const struct snd_pcm_hw_constraint_list lochnagar_sc_chan_constraint = {
.count = ARRAY_SIZE(lochnagar_sc_chan_vals),
.list = lochnagar_sc_chan_vals,
};
static const unsigned int lochnagar_sc_rate_vals[] = {
8000, 16000, 24000, 32000, 48000, 96000, 192000,
22050, 44100, 88200, 176400,
};
static const struct snd_pcm_hw_constraint_list lochnagar_sc_rate_constraint = {
.count = ARRAY_SIZE(lochnagar_sc_rate_vals),
.list = lochnagar_sc_rate_vals,
};
static int lochnagar_sc_hw_rule_rate(struct snd_pcm_hw_params *params,
struct snd_pcm_hw_rule *rule)
{
struct snd_interval range = {
.min = 8000,
.max = 24576000 / hw_param_interval(params, rule->deps[0])->max,
};
return snd_interval_refine(hw_param_interval(params, rule->var),
&range);
}
static int lochnagar_sc_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *comp = dai->component;
struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
int ret;
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
&lochnagar_sc_rate_constraint);
if (ret)
return ret;
return snd_pcm_hw_rule_add(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE,
lochnagar_sc_hw_rule_rate, priv,
SNDRV_PCM_HW_PARAM_FRAME_BITS, -1);
}
static int lochnagar_sc_line_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *comp = dai->component;
struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
int ret;
ret = clk_prepare_enable(priv->mclk);
if (ret < 0) {
dev_err(dai->dev, "Failed to enable MCLK: %d\n", ret);
return ret;
}
ret = lochnagar_sc_startup(substream, dai);
if (ret)
return ret;
return snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_CHANNELS,
&lochnagar_sc_chan_constraint);
}
static void lochnagar_sc_line_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_component *comp = dai->component;
struct lochnagar_sc_priv *priv = snd_soc_component_get_drvdata(comp);
clk_disable_unprepare(priv->mclk);
}
static int lochnagar_sc_check_fmt(struct snd_soc_dai *dai, unsigned int fmt,
unsigned int tar)
{
tar |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
if ((fmt & ~SND_SOC_DAIFMT_CLOCK_MASK) != tar)
return -EINVAL;
return 0;
}
static int lochnagar_sc_set_line_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBS_CFS);
}
static int lochnagar_sc_set_usb_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
return lochnagar_sc_check_fmt(dai, fmt, SND_SOC_DAIFMT_CBM_CFM);
}
static const struct snd_soc_dai_ops lochnagar_sc_line_ops = {
.startup = lochnagar_sc_line_startup,
.shutdown = lochnagar_sc_line_shutdown,
.set_fmt = lochnagar_sc_set_line_fmt,
};
static const struct snd_soc_dai_ops lochnagar_sc_usb_ops = {
.startup = lochnagar_sc_startup,
.set_fmt = lochnagar_sc_set_usb_fmt,
};
static struct snd_soc_dai_driver lochnagar_sc_dai[] = {
{
.name = "lochnagar-line",
.playback = {
.stream_name = "AIF1 Playback",
.channels_min = 4,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "AIF1 Capture",
.channels_min = 4,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &lochnagar_sc_line_ops,
.symmetric_rate = true,
.symmetric_sample_bits = true,
},
{
.name = "lochnagar-usb1",
.playback = {
.stream_name = "USB1 Playback",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "USB1 Capture",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &lochnagar_sc_usb_ops,
.symmetric_rate = true,
.symmetric_sample_bits = true,
},
{
.name = "lochnagar-usb2",
.playback = {
.stream_name = "USB2 Playback",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.capture = {
.stream_name = "USB2 Capture",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S32_LE,
},
.ops = &lochnagar_sc_usb_ops,
.symmetric_rate = true,
.symmetric_sample_bits = true,
},
};
static const struct snd_soc_component_driver lochnagar_sc_driver = {
.dapm_widgets = lochnagar_sc_widgets,
.num_dapm_widgets = ARRAY_SIZE(lochnagar_sc_widgets),
.dapm_routes = lochnagar_sc_routes,
.num_dapm_routes = ARRAY_SIZE(lochnagar_sc_routes),
.endianness = 1,
};
static int lochnagar_sc_probe(struct platform_device *pdev)
{
struct lochnagar_sc_priv *priv;
int ret;
priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
priv->mclk = devm_clk_get(&pdev->dev, "mclk");
if (IS_ERR(priv->mclk)) {
ret = PTR_ERR(priv->mclk);
dev_err(&pdev->dev, "Failed to get MCLK: %d\n", ret);
return ret;
}
platform_set_drvdata(pdev, priv);
return devm_snd_soc_register_component(&pdev->dev,
&lochnagar_sc_driver,
lochnagar_sc_dai,
ARRAY_SIZE(lochnagar_sc_dai));
}
static const struct of_device_id lochnagar_of_match[] = {
{ .compatible = "cirrus,lochnagar2-soundcard" },
{}
};
MODULE_DEVICE_TABLE(of, lochnagar_of_match);
static struct platform_driver lochnagar_sc_codec_driver = {
.driver = {
.name = "lochnagar-soundcard",
.of_match_table = lochnagar_of_match,
},
.probe = lochnagar_sc_probe,
};
module_platform_driver(lochnagar_sc_codec_driver);
MODULE_DESCRIPTION("ASoC Lochnagar Sound Card Driver");
MODULE_AUTHOR("Piotr Stankiewicz <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:lochnagar-soundcard");
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