Initial import

1 files changed, 172 insertions, 0 deletions

diff --git a/sound/soc/codecs/pcm3008.c b/sound/soc/codecs/pcm3008.c
new file mode 100644
index 000000000..8fb445f33
--- /dev/null
+++ b/sound/soc/codecs/pcm3008.c
@@ -0,0 +1,172 @@
+/*
+ * ALSA Soc PCM3008 codec support
+ *
+ * Author:	Hugo Villeneuve
+ * Copyright (C) 2008 Lyrtech inc
+ *
+ * Based on AC97 Soc codec, original copyright follow:
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ *
+ *  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;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ * Generic PCM3008 support.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include "pcm3008.h"
+
+static int pcm3008_dac_ev(struct snd_soc_dapm_widget *w,
+			  struct snd_kcontrol *kcontrol,
+			  int event)
+{
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+	struct pcm3008_setup_data *setup = codec->dev->platform_data;
+
+	gpio_set_value_cansleep(setup->pdda_pin,
+				SND_SOC_DAPM_EVENT_ON(event));
+
+	return 0;
+}
+
+static int pcm3008_adc_ev(struct snd_soc_dapm_widget *w,
+			  struct snd_kcontrol *kcontrol,
+			  int event)
+{
+	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
+	struct pcm3008_setup_data *setup = codec->dev->platform_data;
+
+	gpio_set_value_cansleep(setup->pdad_pin,
+				SND_SOC_DAPM_EVENT_ON(event));
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget pcm3008_dapm_widgets[] = {
+SND_SOC_DAPM_INPUT("VINL"),
+SND_SOC_DAPM_INPUT("VINR"),
+
+SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_dac_ev,
+		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+SND_SOC_DAPM_ADC_E("ADC", NULL, SND_SOC_NOPM, 0, 0, pcm3008_adc_ev,
+		   SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
+
+SND_SOC_DAPM_OUTPUT("VOUTL"),
+SND_SOC_DAPM_OUTPUT("VOUTR"),
+};
+
+static const struct snd_soc_dapm_route pcm3008_dapm_routes[] = {
+	{ "PCM3008 Capture", NULL, "ADC" },
+	{ "ADC", NULL, "VINL" },
+	{ "ADC", NULL, "VINR" },
+
+	{ "DAC", NULL, "PCM3008 Playback" },
+	{ "VOUTL", NULL, "DAC" },
+	{ "VOUTR", NULL, "DAC" },
+};
+
+#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |	\
+		       SNDRV_PCM_RATE_48000)
+
+static struct snd_soc_dai_driver pcm3008_dai = {
+	.name = "pcm3008-hifi",
+	.playback = {
+		.stream_name = "PCM3008 Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = PCM3008_RATES,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+	.capture = {
+		.stream_name = "PCM3008 Capture",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = PCM3008_RATES,
+		.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	},
+};
+
+static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = {
+	.dapm_widgets = pcm3008_dapm_widgets,
+	.num_dapm_widgets = ARRAY_SIZE(pcm3008_dapm_widgets),
+	.dapm_routes = pcm3008_dapm_routes,
+	.num_dapm_routes = ARRAY_SIZE(pcm3008_dapm_routes),
+};
+
+static int pcm3008_codec_probe(struct platform_device *pdev)
+{
+	struct pcm3008_setup_data *setup = pdev->dev.platform_data;
+	int ret;
+
+	if (!setup)
+		return -EINVAL;
+
+	/* DEM1  DEM0  DE-EMPHASIS_MODE
+	 * Low   Low   De-emphasis 44.1 kHz ON
+	 * Low   High  De-emphasis OFF
+	 * High  Low   De-emphasis 48 kHz ON
+	 * High  High  De-emphasis 32 kHz ON
+	 */
+
+	/* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
+	ret = devm_gpio_request_one(&pdev->dev, setup->dem0_pin,
+				    GPIOF_OUT_INIT_HIGH, "codec_dem0");
+	if (ret != 0)
+		return ret;
+
+	/* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
+	ret = devm_gpio_request_one(&pdev->dev, setup->dem1_pin,
+				    GPIOF_OUT_INIT_LOW, "codec_dem1");
+	if (ret != 0)
+		return ret;
+
+	/* Configure PDAD GPIO. */
+	ret = devm_gpio_request_one(&pdev->dev, setup->pdad_pin,
+				    GPIOF_OUT_INIT_LOW, "codec_pdad");
+	if (ret != 0)
+		return ret;
+
+	/* Configure PDDA GPIO. */
+	ret = devm_gpio_request_one(&pdev->dev, setup->pdda_pin,
+				    GPIOF_OUT_INIT_LOW, "codec_pdda");
+	if (ret != 0)
+		return ret;
+
+	return snd_soc_register_codec(&pdev->dev,
+			&soc_codec_dev_pcm3008, &pcm3008_dai, 1);
+}
+
+static int pcm3008_codec_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+
+	return 0;
+}
+
+MODULE_ALIAS("platform:pcm3008-codec");
+
+static struct platform_driver pcm3008_codec_driver = {
+	.probe		= pcm3008_codec_probe,
+	.remove		= pcm3008_codec_remove,
+	.driver		= {
+		.name	= "pcm3008-codec",
+	},
+};
+
+module_platform_driver(pcm3008_codec_driver);
+
+MODULE_DESCRIPTION("Soc PCM3008 driver");
+MODULE_AUTHOR("Hugo Villeneuve");
+MODULE_LICENSE("GPL");