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![Mark Brown](/assets/img/avatar_default.png)
In order to support CODEC<->CODEC links remove the assumption that there is only a single CODEC on a DAI link by removing the use of the CODEC pointer in the rtd from the CODEC drivers. They are already being passed their DAI whenever they are passed an rtd and can get the CODEC from there. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
257 lines
5.9 KiB
C
257 lines
5.9 KiB
C
/*
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* AK4104 ALSA SoC (ASoC) driver
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*
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* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
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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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#include <linux/module.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/soc.h>
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#include <sound/initval.h>
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#include <linux/spi/spi.h>
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#include <sound/asoundef.h>
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/* AK4104 registers addresses */
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#define AK4104_REG_CONTROL1 0x00
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#define AK4104_REG_RESERVED 0x01
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#define AK4104_REG_CONTROL2 0x02
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#define AK4104_REG_TX 0x03
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#define AK4104_REG_CHN_STATUS(x) ((x) + 0x04)
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#define AK4104_NUM_REGS 10
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#define AK4104_REG_MASK 0x1f
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#define AK4104_READ 0xc0
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#define AK4104_WRITE 0xe0
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#define AK4104_RESERVED_VAL 0x5b
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/* Bit masks for AK4104 registers */
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#define AK4104_CONTROL1_RSTN (1 << 0)
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#define AK4104_CONTROL1_PW (1 << 1)
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#define AK4104_CONTROL1_DIF0 (1 << 2)
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#define AK4104_CONTROL1_DIF1 (1 << 3)
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#define AK4104_CONTROL2_SEL0 (1 << 0)
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#define AK4104_CONTROL2_SEL1 (1 << 1)
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#define AK4104_CONTROL2_MODE (1 << 2)
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#define AK4104_TX_TXE (1 << 0)
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#define AK4104_TX_V (1 << 1)
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#define DRV_NAME "ak4104-codec"
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struct ak4104_private {
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struct regmap *regmap;
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};
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static int ak4104_set_dai_fmt(struct snd_soc_dai *codec_dai,
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unsigned int format)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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int val = 0;
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int ret;
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/* set DAI format */
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switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_RIGHT_J:
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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val |= AK4104_CONTROL1_DIF0;
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break;
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case SND_SOC_DAIFMT_I2S:
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val |= AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1;
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break;
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default:
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dev_err(codec->dev, "invalid dai format\n");
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return -EINVAL;
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}
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/* This device can only be slave */
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if ((format & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBS_CFS)
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return -EINVAL;
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ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
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AK4104_CONTROL1_DIF0 | AK4104_CONTROL1_DIF1,
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val);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int ak4104_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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int val = 0;
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/* set the IEC958 bits: consumer mode, no copyright bit */
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val |= IEC958_AES0_CON_NOT_COPYRIGHT;
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snd_soc_write(codec, AK4104_REG_CHN_STATUS(0), val);
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val = 0;
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switch (params_rate(params)) {
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case 44100:
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val |= IEC958_AES3_CON_FS_44100;
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break;
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case 48000:
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val |= IEC958_AES3_CON_FS_48000;
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break;
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case 32000:
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val |= IEC958_AES3_CON_FS_32000;
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break;
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default:
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dev_err(codec->dev, "unsupported sampling rate\n");
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return -EINVAL;
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}
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return snd_soc_write(codec, AK4104_REG_CHN_STATUS(3), val);
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}
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static const struct snd_soc_dai_ops ak4101_dai_ops = {
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.hw_params = ak4104_hw_params,
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.set_fmt = ak4104_set_dai_fmt,
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};
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static struct snd_soc_dai_driver ak4104_dai = {
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.name = "ak4104-hifi",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_192000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_3LE |
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SNDRV_PCM_FMTBIT_S24_LE
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},
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.ops = &ak4101_dai_ops,
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};
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static int ak4104_probe(struct snd_soc_codec *codec)
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{
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struct ak4104_private *ak4104 = snd_soc_codec_get_drvdata(codec);
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int ret;
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codec->control_data = ak4104->regmap;
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ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP);
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if (ret != 0)
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return ret;
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/* set power-up and non-reset bits */
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ret = snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN,
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN);
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if (ret < 0)
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return ret;
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/* enable transmitter */
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ret = snd_soc_update_bits(codec, AK4104_REG_TX,
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AK4104_TX_TXE, AK4104_TX_TXE);
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if (ret < 0)
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return ret;
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return 0;
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}
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static int ak4104_remove(struct snd_soc_codec *codec)
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{
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snd_soc_update_bits(codec, AK4104_REG_CONTROL1,
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AK4104_CONTROL1_PW | AK4104_CONTROL1_RSTN, 0);
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return 0;
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}
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static struct snd_soc_codec_driver soc_codec_device_ak4104 = {
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.probe = ak4104_probe,
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.remove = ak4104_remove,
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};
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static const struct regmap_config ak4104_regmap = {
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.reg_bits = 8,
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.val_bits = 8,
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.max_register = AK4104_NUM_REGS - 1,
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.read_flag_mask = AK4104_READ,
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.write_flag_mask = AK4104_WRITE,
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.cache_type = REGCACHE_RBTREE,
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};
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static int ak4104_spi_probe(struct spi_device *spi)
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{
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struct ak4104_private *ak4104;
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unsigned int val;
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int ret;
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spi->bits_per_word = 8;
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spi->mode = SPI_MODE_0;
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ret = spi_setup(spi);
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if (ret < 0)
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return ret;
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ak4104 = devm_kzalloc(&spi->dev, sizeof(struct ak4104_private),
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GFP_KERNEL);
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if (ak4104 == NULL)
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return -ENOMEM;
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ak4104->regmap = regmap_init_spi(spi, &ak4104_regmap);
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if (IS_ERR(ak4104->regmap)) {
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ret = PTR_ERR(ak4104->regmap);
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return ret;
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}
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/* read the 'reserved' register - according to the datasheet, it
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* should contain 0x5b. Not a good way to verify the presence of
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* the device, but there is no hardware ID register. */
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ret = regmap_read(ak4104->regmap, AK4104_REG_RESERVED, &val);
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if (ret != 0)
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goto err;
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if (val != AK4104_RESERVED_VAL) {
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ret = -ENODEV;
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goto err;
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}
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spi_set_drvdata(spi, ak4104);
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ret = snd_soc_register_codec(&spi->dev,
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&soc_codec_device_ak4104, &ak4104_dai, 1);
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if (ret != 0)
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goto err;
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return 0;
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err:
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regmap_exit(ak4104->regmap);
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return ret;
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}
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static int __devexit ak4104_spi_remove(struct spi_device *spi)
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{
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struct ak4104_private *ak4101 = spi_get_drvdata(spi);
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regmap_exit(ak4101->regmap);
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snd_soc_unregister_codec(&spi->dev);
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return 0;
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}
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static struct spi_driver ak4104_spi_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = ak4104_spi_probe,
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.remove = __devexit_p(ak4104_spi_remove),
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};
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module_spi_driver(ak4104_spi_driver);
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MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
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MODULE_DESCRIPTION("Asahi Kasei AK4104 ALSA SoC driver");
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MODULE_LICENSE("GPL");
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