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+/*
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+ * ALSA Soc PCM3008 codec support
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+ *
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+ * Author: Hugo Villeneuve
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+ * Copyright (C) 2008 Lyrtech inc
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+ *
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+ * Based on AC97 Soc codec, original copyright follow:
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+ * Copyright 2005 Wolfson Microelectronics PLC.
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * Generic PCM3008 support.
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/device.h>
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+#include <linux/gpio.h>
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+#include <sound/core.h>
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+#include <sound/pcm.h>
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+#include <sound/initval.h>
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+#include <sound/soc.h>
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+
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+#include "pcm3008.h"
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+
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+#define PCM3008_VERSION "0.2"
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+
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+#define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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+ SNDRV_PCM_RATE_48000)
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+
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+struct snd_soc_dai pcm3008_dai = {
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+ .name = "PCM3008 HiFi",
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+ .type = SND_SOC_DAI_I2S,
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+ .playback = {
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+ .stream_name = "PCM3008 Playback",
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+ .channels_min = 1,
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+ .channels_max = 2,
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+ .rates = PCM3008_RATES,
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+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
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+ },
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+ .capture = {
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+ .stream_name = "PCM3008 Capture",
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+ .channels_min = 1,
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+ .channels_max = 2,
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+ .rates = PCM3008_RATES,
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+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
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+ },
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+};
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+EXPORT_SYMBOL_GPL(pcm3008_dai);
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+
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+static void pcm3008_gpio_free(struct pcm3008_setup_data *setup)
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+{
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+ gpio_free(setup->dem0_pin);
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+ gpio_free(setup->dem1_pin);
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+ gpio_free(setup->pdad_pin);
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+ gpio_free(setup->pdda_pin);
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+}
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+
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+static int pcm3008_soc_probe(struct platform_device *pdev)
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+{
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+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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+ struct snd_soc_codec *codec;
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+ struct pcm3008_setup_data *setup = socdev->codec_data;
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+ int ret = 0;
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+
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+ printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION);
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+
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+ socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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+ if (!socdev->codec)
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+ return -ENOMEM;
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+
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+ codec = socdev->codec;
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+ mutex_init(&codec->mutex);
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+
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+ codec->name = "PCM3008";
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+ codec->owner = THIS_MODULE;
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+ codec->dai = &pcm3008_dai;
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+ codec->num_dai = 1;
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+ codec->write = NULL;
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+ codec->read = NULL;
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+ INIT_LIST_HEAD(&codec->dapm_widgets);
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+ INIT_LIST_HEAD(&codec->dapm_paths);
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+
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+ /* Register PCMs. */
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+ ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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+ if (ret < 0) {
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+ printk(KERN_ERR "pcm3008: failed to create pcms\n");
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+ goto pcm_err;
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+ }
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+
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+ /* Register Card. */
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+ ret = snd_soc_register_card(socdev);
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+ if (ret < 0) {
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+ printk(KERN_ERR "pcm3008: failed to register card\n");
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+ goto card_err;
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+ }
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+
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+ /* DEM1 DEM0 DE-EMPHASIS_MODE
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+ * Low Low De-emphasis 44.1 kHz ON
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+ * Low High De-emphasis OFF
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+ * High Low De-emphasis 48 kHz ON
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+ * High High De-emphasis 32 kHz ON
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+ */
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+
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+ /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */
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+ ret = gpio_request(setup->dem0_pin, "codec_dem0");
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+ if (ret == 0)
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+ ret = gpio_direction_output(setup->dem0_pin, 1);
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+ if (ret != 0)
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+ goto gpio_err;
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+
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+ /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */
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+ ret = gpio_request(setup->dem1_pin, "codec_dem1");
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+ if (ret == 0)
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+ ret = gpio_direction_output(setup->dem1_pin, 0);
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+ if (ret != 0)
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+ goto gpio_err;
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+
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+ /* Configure PDAD GPIO. */
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+ ret = gpio_request(setup->pdad_pin, "codec_pdad");
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+ if (ret == 0)
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+ ret = gpio_direction_output(setup->pdad_pin, 1);
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+ if (ret != 0)
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+ goto gpio_err;
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+
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+ /* Configure PDDA GPIO. */
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+ ret = gpio_request(setup->pdda_pin, "codec_pdda");
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+ if (ret == 0)
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+ ret = gpio_direction_output(setup->pdda_pin, 1);
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+ if (ret != 0)
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+ goto gpio_err;
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+
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+ return ret;
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+
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+gpio_err:
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+ pcm3008_gpio_free(setup);
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+card_err:
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+ snd_soc_free_pcms(socdev);
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+pcm_err:
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+ kfree(socdev->codec);
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+
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+ return ret;
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+}
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+
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+static int pcm3008_soc_remove(struct platform_device *pdev)
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+{
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+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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+ struct snd_soc_codec *codec = socdev->codec;
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+ struct pcm3008_setup_data *setup = socdev->codec_data;
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+
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+ if (!codec)
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+ return 0;
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+
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+ pcm3008_gpio_free(setup);
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+ snd_soc_free_pcms(socdev);
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+ kfree(socdev->codec);
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+
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+ return 0;
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+}
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+
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+#ifdef CONFIG_PM
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+static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg)
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+{
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+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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+ struct pcm3008_setup_data *setup = socdev->codec_data;
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+
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+ gpio_set_value(setup->pdad_pin, 0);
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+ gpio_set_value(setup->pdda_pin, 0);
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+
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+ return 0;
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+}
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+
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+static int pcm3008_soc_resume(struct platform_device *pdev)
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+{
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+ struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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+ struct pcm3008_setup_data *setup = socdev->codec_data;
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+
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+ gpio_set_value(setup->pdad_pin, 1);
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+ gpio_set_value(setup->pdda_pin, 1);
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+
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+ return 0;
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+}
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+#else
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+#define pcm3008_soc_suspend NULL
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+#define pcm3008_soc_resume NULL
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+#endif
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+
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+struct snd_soc_codec_device soc_codec_dev_pcm3008 = {
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+ .probe = pcm3008_soc_probe,
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+ .remove = pcm3008_soc_remove,
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+ .suspend = pcm3008_soc_suspend,
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+ .resume = pcm3008_soc_resume,
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+};
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+EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008);
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+
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+MODULE_DESCRIPTION("Soc PCM3008 driver");
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+MODULE_AUTHOR("Hugo Villeneuve");
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+MODULE_LICENSE("GPL");
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