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/*
* Greybus audio driver
* Copyright 2015 Google Inc.
* Copyright 2015 Linaro Ltd.
*
* Released under the GPLv2 only.
*/
#include <linux/module.h>
#include "audio_codec.h"
static int gbcodec_event_spk(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
/* Ensure GB speaker is connected */
return 0;
}
static int gbcodec_event_hp(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
/* Ensure GB module supports jack slot */
return 0;
}
static int gbcodec_event_int_mic(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
/* Ensure GB module supports jack slot */
return 0;
}
static const struct snd_kcontrol_new gbcodec_snd_controls[] = {
SOC_DOUBLE("Playback Mute", GBCODEC_MUTE_REG, 0, 1, 1, 1),
SOC_DOUBLE("Capture Mute", GBCODEC_MUTE_REG, 4, 5, 1, 1),
SOC_DOUBLE_R("Playback Volume", GBCODEC_PB_LVOL_REG,
GBCODEC_PB_RVOL_REG, 0, 127, 0),
SOC_DOUBLE_R("Capture Volume", GBCODEC_CAP_LVOL_REG,
GBCODEC_CAP_RVOL_REG, 0, 127, 0),
};
static const struct snd_kcontrol_new spk_amp_ctl =
SOC_DAPM_SINGLE("Switch", GBCODEC_CTL_REG, 0, 1, 0);
static const struct snd_kcontrol_new hp_amp_ctl =
SOC_DAPM_SINGLE("Switch", GBCODEC_CTL_REG, 1, 1, 0);
static const struct snd_kcontrol_new mic_adc_ctl =
SOC_DAPM_SINGLE("Switch", GBCODEC_CTL_REG, 4, 1, 0);
/* APB1-GBSPK source */
static const char * const gbcodec_apb1_src[] = {"Stereo", "Left", "Right"};
static const SOC_ENUM_SINGLE_DECL(
gbcodec_apb1_rx_enum, GBCODEC_APB1_MUX_REG, 0, gbcodec_apb1_src);
static const struct snd_kcontrol_new gbcodec_apb1_rx_mux =
SOC_DAPM_ENUM("APB1 source", gbcodec_apb1_rx_enum);
static const SOC_ENUM_SINGLE_DECL(
gbcodec_mic_enum, GBCODEC_APB1_MUX_REG, 4, gbcodec_apb1_src);
static const struct snd_kcontrol_new gbcodec_mic_mux =
SOC_DAPM_ENUM("MIC source", gbcodec_mic_enum);
static const struct snd_soc_dapm_widget gbcodec_dapm_widgets[] = {
SND_SOC_DAPM_SPK("Spk", gbcodec_event_spk),
SND_SOC_DAPM_SPK("HP", gbcodec_event_hp),
SND_SOC_DAPM_MIC("Int Mic", gbcodec_event_int_mic),
SND_SOC_DAPM_OUTPUT("SPKOUT"),
SND_SOC_DAPM_OUTPUT("HPOUT"),
SND_SOC_DAPM_INPUT("MIC"),
SND_SOC_DAPM_INPUT("HSMIC"),
SND_SOC_DAPM_SWITCH("SPK Amp", SND_SOC_NOPM, 0, 0, &spk_amp_ctl),
SND_SOC_DAPM_SWITCH("HP Amp", SND_SOC_NOPM, 0, 0, &hp_amp_ctl),
SND_SOC_DAPM_SWITCH("MIC ADC", SND_SOC_NOPM, 0, 0, &mic_adc_ctl),
SND_SOC_DAPM_PGA("SPK DAC", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_PGA("HP DAC", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("SPK Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("HP Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MIXER("APB1_TX Mixer", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_MUX("APB1_RX Mux", SND_SOC_NOPM, 0, 0,
&gbcodec_apb1_rx_mux),
SND_SOC_DAPM_MUX("MIC Mux", SND_SOC_NOPM, 0, 0, &gbcodec_mic_mux),
SND_SOC_DAPM_AIF_IN("APB1RX", "APBridgeA1 Playback", 0, SND_SOC_NOPM, 0,
0),
SND_SOC_DAPM_AIF_OUT("APB1TX", "APBridgeA1 Capture", 0, SND_SOC_NOPM, 0,
0),
};
static const struct snd_soc_dapm_route gbcodec_dapm_routes[] = {
/* Playback path */
{"Spk", NULL, "SPKOUT"},
{"SPKOUT", NULL, "SPK Amp"},
{"SPK Amp", "Switch", "SPK DAC"},
{"SPK DAC", NULL, "SPK Mixer"},
{"HP", NULL, "HPOUT"},
{"HPOUT", NULL, "HP Amp"},
{"HP Amp", "Switch", "HP DAC"},
{"HP DAC", NULL, "HP Mixer"},
{"SPK Mixer", NULL, "APB1_RX Mux"},
{"HP Mixer", NULL, "APB1_RX Mux"},
{"APB1_RX Mux", "Left", "APB1RX"},
{"APB1_RX Mux", "Right", "APB1RX"},
{"APB1_RX Mux", "Stereo", "APB1RX"},
/* Capture path */
{"MIC", NULL, "Int Mic"},
{"MIC", NULL, "MIC Mux"},
{"MIC Mux", "Left", "MIC ADC"},
{"MIC Mux", "Right", "MIC ADC"},
{"MIC Mux", "Stereo", "MIC ADC"},
{"MIC ADC", "Switch", "APB1_TX Mixer"},
{"APB1_TX Mixer", NULL, "APB1TX"}
};
static int gbcodec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return 0;
}
static void gbcodec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
}
static int gbcodec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hwparams,
struct snd_soc_dai *dai)
{
return 0;
}
static int gbcodec_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
return 0;
}
static int gbcodec_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
return 0;
}
static int gbcodec_digital_mute(struct snd_soc_dai *dai, int mute)
{
return 0;
}
static struct snd_soc_dai_ops gbcodec_dai_ops = {
.startup = gbcodec_startup,
.shutdown = gbcodec_shutdown,
.hw_params = gbcodec_hw_params,
.prepare = gbcodec_prepare,
.set_fmt = gbcodec_set_dai_fmt,
.digital_mute = gbcodec_digital_mute,
};
static struct snd_soc_dai_driver gbcodec_dai = {
.playback = {
.stream_name = "APBridgeA1 Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.capture = {
.stream_name = "APBridgeA1 Capture",
.channels_min = 2,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
.ops = &gbcodec_dai_ops,
};
static int gbcodec_probe(struct snd_soc_codec *codec)
{
struct gbaudio_codec_info *gbcodec = snd_soc_codec_get_drvdata(codec);
gbcodec->codec = codec;
return 0;
}
static int gbcodec_remove(struct snd_soc_codec *codec)
{
/* Empty function for now */
return 0;
}
static int gbcodec_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
int ret = 0;
struct gbaudio_codec_info *gbcodec = snd_soc_codec_get_drvdata(codec);
u8 *gbcodec_reg = gbcodec->reg;
if (reg == SND_SOC_NOPM)
return 0;
if (reg >= GBCODEC_REG_COUNT)
return 0;
gbcodec_reg[reg] = value;
dev_dbg(codec->dev, "reg[%d] = 0x%x\n", reg, value);
return ret;
}
static unsigned int gbcodec_read(struct snd_soc_codec *codec,
unsigned int reg)
{
unsigned int val = 0;
struct gbaudio_codec_info *gbcodec = snd_soc_codec_get_drvdata(codec);
u8 *gbcodec_reg = gbcodec->reg;
if (reg == SND_SOC_NOPM)
return 0;
if (reg >= GBCODEC_REG_COUNT)
return 0;
val = gbcodec_reg[reg];
dev_dbg(codec->dev, "reg[%d] = 0x%x\n", reg, val);
return val;
}
static struct snd_soc_codec_driver soc_codec_dev_gbcodec = {
.probe = gbcodec_probe,
.remove = gbcodec_remove,
.read = gbcodec_read,
.write = gbcodec_write,
.reg_cache_size = GBCODEC_REG_COUNT,
.reg_cache_default = gbcodec_reg_defaults,
.reg_word_size = 1,
.idle_bias_off = true,
.controls = gbcodec_snd_controls,
.num_controls = ARRAY_SIZE(gbcodec_snd_controls),
.dapm_widgets = gbcodec_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(gbcodec_dapm_widgets),
.dapm_routes = gbcodec_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(gbcodec_dapm_routes),
};
static int gbaudio_codec_probe(struct platform_device *pdev)
{
int ret;
struct gbaudio_codec_info *gbcodec;
char dai_name[NAME_SIZE];
gbcodec = devm_kzalloc(&pdev->dev, sizeof(struct gbaudio_codec_info),
GFP_KERNEL);
if (!gbcodec)
return -ENOMEM;
platform_set_drvdata(pdev, gbcodec);
snprintf(dai_name, NAME_SIZE, "%s.%d", "gbcodec_pcm", pdev->id);
gbcodec_dai.name = dai_name;
ret = snd_soc_register_codec(&pdev->dev, &soc_codec_dev_gbcodec,
&gbcodec_dai, 1);
if (!ret)
gbcodec->registered = 1;
return ret;
}
static const struct of_device_id gbcodec_of_match[] = {
{ .compatible = "greybus,codec", },
{},
};
static int gbaudio_codec_remove(struct platform_device *pdev)
{
snd_soc_unregister_codec(&pdev->dev);
return 0;
}
static struct platform_driver gbaudio_codec_driver = {
.driver = {
.name = "gbaudio-codec",
.owner = THIS_MODULE,
.of_match_table = gbcodec_of_match,
},
.probe = gbaudio_codec_probe,
.remove = gbaudio_codec_remove,
};
module_platform_driver(gbaudio_codec_driver);
MODULE_DESCRIPTION("Greybus Audio virtual codec driver");
MODULE_AUTHOR("Vaibhav Agarwal <vaibhav.agarwal@linaro.org>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:gbaudio-codec");
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