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Diffstat (limited to 'sound/soc/codecs/ak4104.c')
-rw-r--r--sound/soc/codecs/ak4104.c360
1 files changed, 360 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4104.c b/sound/soc/codecs/ak4104.c
new file mode 100644
index 000000000..1fd7f72b2
--- /dev/null
+++ b/sound/soc/codecs/ak4104.c
@@ -0,0 +1,360 @@
+/*
+ * AK4104 ALSA SoC (ASoC) driver
+ *
+ * Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/regulator/consumer.h>
+#include <sound/asoundef.h>
+#include <sound/core.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+
+/* AK4104 registers addresses */
+#define AK4104_REG_CONTROL1 0x00
+#define AK4104_REG_RESERVED 0x01
+#define AK4104_REG_CONTROL2 0x02
+#define AK4104_REG_TX 0x03
+#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
+#define AK4104_NUM_REGS 10
+
+#define AK4104_REG_MASK 0x1f
+#define AK4104_READ 0xc0
+#define AK4104_WRITE 0xe0
+#define AK4104_RESERVED_VAL 0x5b
+
+/* Bit masks for AK4104 registers */
+#define AK4104_CONTROL1_RSTN (1 << 0)
+#define AK4104_CONTROL1_PW (1 << 1)
+#define AK4104_CONTROL1_DIF0 (1 << 2)
+#define AK4104_CONTROL1_DIF1 (1 << 3)
+
+#define AK4104_CONTROL2_SEL0 (1 << 0)
+#define AK4104_CONTROL2_SEL1 (1 << 1)
+#define AK4104_CONTROL2_MODE (1 << 2)
+
+#define AK4104_TX_TXE (1 << 0)
+#define AK4104_TX_V (1 << 1)
+
+struct ak4104_private {
+ struct regmap *regmap;
+ struct regulator *regulator;
+};
+
+static const struct snd_soc_dapm_widget ak4104_dapm_widgets[] = {
+SND_SOC_DAPM_PGA("TXE", AK4104_REG_TX, AK4104_TX_TXE, 0, NULL, 0),
+
+SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route ak4104_dapm_routes[] = {
+ { "TXE", NULL, "Playback" },
+ { "TX", NULL, "TXE" },
+};
+
+static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int format)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
+ int val = 0;
+ int ret;
+
+ /* set DAI format */
+ switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ val |= AK4104_CONTROL1_DIF0;
+ break;
+ case SND_SOC_DAIFMT_I2S:
+ val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
+ break;
+ default:
+ dev_err(codec->dev, "invalid dai format\n");
+ return -EINVAL;
+ }
+
+ /* This device can only be slave */
+ if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
+ return -EINVAL;
+
+ ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
+ AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
+ val);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int ak4104_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
+ int ret, val = 0;
+
+ /* set the IEC958 bits: consumer mode, no copyright bit */
+ val |= IEC958_AES0_CON_NOT_COPYRIGHT;
+ regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(0), val);
+
+ val = 0;
+
+ switch (params_rate(params)) {
+ case 22050:
+ val |= IEC958_AES3_CON_FS_22050;
+ break;
+ case 24000:
+ val |= IEC958_AES3_CON_FS_24000;
+ break;
+ case 32000:
+ val |= IEC958_AES3_CON_FS_32000;
+ break;
+ case 44100:
+ val |= IEC958_AES3_CON_FS_44100;
+ break;
+ case 48000:
+ val |= IEC958_AES3_CON_FS_48000;
+ break;
+ case 88200:
+ val |= IEC958_AES3_CON_FS_88200;
+ break;
+ case 96000:
+ val |= IEC958_AES3_CON_FS_96000;
+ break;
+ case 176400:
+ val |= IEC958_AES3_CON_FS_176400;
+ break;
+ case 192000:
+ val |= IEC958_AES3_CON_FS_192000;
+ break;
+ default:
+ dev_err(codec->dev, "unsupported sampling rate\n");
+ return -EINVAL;
+ }
+
+ ret = regmap_write(ak4104->regmap, AK4104_REG_CHN_STATUS(3), val);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops ak4101_dai_ops = {
+ .hw_params = ak4104_hw_params,
+ .set_fmt = ak4104_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver ak4104_dai = {
+ .name = "ak4104-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE |
+ SNDRV_PCM_FMTBIT_S24_3LE |
+ SNDRV_PCM_FMTBIT_S24_LE
+ },
+ .ops = &ak4101_dai_ops,
+};
+
+static int ak4104_probe(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ ret = regulator_enable(ak4104->regulator);
+ if (ret < 0) {
+ dev_err(codec->dev, "Unable to enable regulator: %d\n", ret);
+ return ret;
+ }
+
+ /* set power-up and non-reset bits */
+ ret = regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
+ AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
+ AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
+ if (ret < 0)
+ goto exit_disable_regulator;
+
+ /* enable transmitter */
+ ret = regmap_update_bits(ak4104->regmap, AK4104_REG_TX,
+ AK4104_TX_TXE, AK4104_TX_TXE);
+ if (ret < 0)
+ goto exit_disable_regulator;
+
+ return 0;
+
+exit_disable_regulator:
+ regulator_disable(ak4104->regulator);
+ return ret;
+}
+
+static int ak4104_remove(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
+
+ regmap_update_bits(ak4104->regmap, AK4104_REG_CONTROL1,
+ AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
+ regulator_disable(ak4104->regulator);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int ak4104_soc_suspend(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
+
+ regulator_disable(priv->regulator);
+
+ return 0;
+}
+
+static int ak4104_soc_resume(struct snd_soc_codec *codec)
+{
+ struct ak4104_private *priv = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ ret = regulator_enable(priv->regulator);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+#else
+#define ak4104_soc_suspend NULL
+#define ak4104_soc_resume NULL
+#endif /* CONFIG_PM */
+
+static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
+ .probe = ak4104_probe,
+ .remove = ak4104_remove,
+ .suspend = ak4104_soc_suspend,
+ .resume = ak4104_soc_resume,
+
+ .dapm_widgets = ak4104_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ak4104_dapm_widgets),
+ .dapm_routes = ak4104_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(ak4104_dapm_routes),
+};
+
+static const struct regmap_config ak4104_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = AK4104_NUM_REGS - 1,
+ .read_flag_mask = AK4104_READ,
+ .write_flag_mask = AK4104_WRITE,
+
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int ak4104_spi_probe(struct spi_device *spi)
+{
+ struct device_node *np = spi->dev.of_node;
+ struct ak4104_private *ak4104;
+ unsigned int val;
+ int ret;
+
+ spi->bits_per_word = 8;
+ spi->mode = SPI_MODE_0;
+ ret = spi_setup(spi);
+ if (ret < 0)
+ return ret;
+
+ ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
+ GFP_KERNEL);
+ if (ak4104 == NULL)
+ return -ENOMEM;
+
+ ak4104->regulator = devm_regulator_get(&spi->dev, "vdd");
+ if (IS_ERR(ak4104->regulator)) {
+ ret = PTR_ERR(ak4104->regulator);
+ dev_err(&spi->dev, "Unable to get Vdd regulator: %d\n", ret);
+ return ret;
+ }
+
+ ak4104->regmap = devm_regmap_init_spi(spi, &ak4104_regmap);
+ if (IS_ERR(ak4104->regmap)) {
+ ret = PTR_ERR(ak4104->regmap);
+ return ret;
+ }
+
+ if (np) {
+ enum of_gpio_flags flags;
+ int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
+
+ if (gpio_is_valid(gpio)) {
+ ret = devm_gpio_request_one(&spi->dev, gpio,
+ flags & OF_GPIO_ACTIVE_LOW ?
+ GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
+ "ak4104 reset");
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ /* read the 'reserved' register - according to the datasheet, it
+ * should contain 0x5b. Not a good way to verify the presence of
+ * the device, but there is no hardware ID register. */
+ ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
+ if (ret != 0)
+ return ret;
+ if (val != AK4104_RESERVED_VAL)
+ return -ENODEV;
+
+ spi_set_drvdata(spi, ak4104);
+
+ ret = snd_soc_register_codec(&spi->dev,
+ &soc_codec_device_ak4104, &ak4104_dai, 1);
+ return ret;
+}
+
+static int ak4104_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ return 0;
+}
+
+static const struct of_device_id ak4104_of_match[] = {
+ { .compatible = "asahi-kasei,ak4104", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, ak4104_of_match);
+
+static const struct spi_device_id ak4104_id_table[] = {
+ { "ak4104", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(spi, ak4104_id_table);
+
+static struct spi_driver ak4104_spi_driver = {
+ .driver = {
+ .name = "ak4104",
+ .owner = THIS_MODULE,
+ .of_match_table = ak4104_of_match,
+ },
+ .id_table = ak4104_id_table,
+ .probe = ak4104_spi_probe,
+ .remove = ak4104_spi_remove,
+};
+
+module_spi_driver(ak4104_spi_driver);
+
+MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
+MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
+MODULE_LICENSE("GPL");
+
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-11 13:10:00 +0000