--- /dev/null
+/*
+ * Greybus audio driver
+ * Copyright 2015 Google Inc.
+ * Copyright 2015 Linaro Ltd.
+ *
+ * Released under the GPLv2 only.
+ */
+#include <linux/module.h>
+
+#include "audio.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");
projects / platform / kernel / linux-rpi3.git / commitdiff