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ASoC: sophgo: add CV1800B internal DAC codec driver
Codec DAI endpoint for TXDAC. The codec does only a few things - set up decimation - enable codec and I2S output - ensures the driver doesn't have dac overwrite enabled. (unmute the output) Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com> Link: https://patch.msgid.link/20260120-cv1800b-i2s-driver-v4-5-6ef787dc6426@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Anton D. Stavinskii
Mark Brown
parent
4cf8752a03
commit
b3eb755e2d
3 changed files with 215 additions and 1 deletions
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@ -28,10 +28,19 @@ config SND_SOC_CV1800B_ADC_CODEC
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help
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This driver provides an ASoC codec DAI for capture and basic
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control of the RXADC registers.
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Say Y or M to build support for the Sophgo CV1800B
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internal analog ADC codec block (RXADC).
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The module will be called cv1800b-sound-adc
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config SND_SOC_CV1800B_DAC_CODEC
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tristate "Sophgo CV1800B/SG2002 internal DAC codec"
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depends on SND_SOC
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help
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This driver provides an ASoC codec DAI for playback and basic
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control of the TXDAC registers.
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Say Y or M to build support for the Sophgo CV1800B
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internal analog DAC codec block (TXDAC).
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The module will be called cv1800b-sound-dac
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endmenu
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@ -2,3 +2,4 @@
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# Sophgo Platform Support
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obj-$(CONFIG_SND_SOC_CV1800B_TDM) += cv1800b-tdm.o
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obj-$(CONFIG_SND_SOC_CV1800B_ADC_CODEC) += cv1800b-sound-adc.o
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obj-$(CONFIG_SND_SOC_CV1800B_DAC_CODEC) += cv1800b-sound-dac.o
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204
sound/soc/sophgo/cv1800b-sound-dac.c
Normal file
204
sound/soc/sophgo/cv1800b-sound-dac.c
Normal file
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@ -0,0 +1,204 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Internal DAC codec for cv1800b based CPUs
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/bitfield.h>
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#include <linux/bits.h>
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#include <sound/soc.h>
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#include <linux/io.h>
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#define CV1800B_TXDAC_CTRL0 0x00
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#define CV1800B_TXDAC_CTRL1 0x04
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#define CV1800B_TXDAC_STATUS 0x08
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#define CV1800B_TXDAC_AFE0 0x0c
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#define CV1800B_TXDAC_AFE1 0x10
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#define CV1800B_TXDAC_ANA0 0x20
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#define CV1800B_TXDAC_ANA1 0x24
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#define CV1800B_TXDAC_ANA2 0x28
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/* cv1800b_TXDAC_CTRL0 */
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#define REG_TXDAC_EN GENMASK(0, 0)
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#define REG_I2S_RX_EN GENMASK(1, 1)
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/* cv1800b_TXDAC_CTRL1 */
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#define REG_TXDAC_CIC_OPT GENMASK(1, 0)
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/* cv1800b_TXDAC_AFE0 */
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#define REG_TXDAC_INIT_DLY_CNT GENMASK(5, 0)
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/* cv1800b_TXDAC_ANA2 */
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#define TXDAC_OW_VAL_L_MASK GENMASK(7, 0)
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#define TXDAC_OW_VAL_R_MASK GENMASK(15, 8)
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#define TXDAC_OW_EN_L_MASK GENMASK(16, 16)
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#define TXDAC_OW_EN_R_MASK GENMASK(17, 17)
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struct cv1800b_priv {
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void __iomem *regs;
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struct device *dev;
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};
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enum decimation_values {
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DECIMATION_64 = 0,
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DECIMATION_128,
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DECIMATION_256,
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DECIMATION_512,
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};
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static void cv1800b_dac_enable(struct cv1800b_priv *priv, bool enable)
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{
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u32 val;
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val = readl(priv->regs + CV1800B_TXDAC_CTRL0);
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val = u32_replace_bits(val, enable, REG_TXDAC_EN);
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val = u32_replace_bits(val, enable, REG_I2S_RX_EN);
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writel(val, priv->regs + CV1800B_TXDAC_CTRL0);
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}
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static void cv1800b_dac_mute(struct cv1800b_priv *priv, bool enable)
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{
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u32 val;
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val = readl(priv->regs + CV1800B_TXDAC_ANA2);
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val = u32_replace_bits(val, enable, TXDAC_OW_EN_L_MASK);
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val = u32_replace_bits(val, enable, TXDAC_OW_EN_R_MASK);
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writel(val, priv->regs + CV1800B_TXDAC_ANA2);
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}
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static int cv1800b_dac_decimation(struct cv1800b_priv *priv, u8 dec)
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{
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u32 val;
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if (dec > 3)
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return -EINVAL;
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val = readl(priv->regs + CV1800B_TXDAC_CTRL1);
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val = u32_replace_bits(val, dec, REG_TXDAC_CIC_OPT);
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writel(val, priv->regs + CV1800B_TXDAC_CTRL1);
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return 0;
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}
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static int cv1800b_dac_dly(struct cv1800b_priv *priv, u32 dly)
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{
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u32 val;
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if (dly > 63)
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return -EINVAL;
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val = readl(priv->regs + CV1800B_TXDAC_AFE0);
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val = u32_replace_bits(val, dly, REG_TXDAC_INIT_DLY_CNT);
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writel(val, priv->regs + CV1800B_TXDAC_AFE0);
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return 0;
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}
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static int cv1800b_dac_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 cv1800b_priv *priv = snd_soc_dai_get_drvdata(dai);
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int ret;
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unsigned int rate = params_rate(params);
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if (rate != 48000) {
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dev_err(priv->dev, "rate %u is not supported\n", rate);
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return -EINVAL;
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}
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cv1800b_dac_mute(priv, false);
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/* minimal decimation for 48kHz is 64*/
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ret = cv1800b_dac_decimation(priv, DECIMATION_64);
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if (ret)
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return ret;
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/* value is taken from vendors driver 48kHz
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* tested on sg2000 and sg2002.
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*/
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ret = cv1800b_dac_dly(priv, 0x19);
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if (ret)
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return ret;
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return 0;
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}
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static int cv1800b_dac_dai_trigger(struct snd_pcm_substream *substream, int cmd,
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struct snd_soc_dai *dai)
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{
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struct cv1800b_priv *priv = snd_soc_dai_get_drvdata(dai);
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switch (cmd) {
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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cv1800b_dac_enable(priv, true);
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break;
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case SNDRV_PCM_TRIGGER_STOP:
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case SNDRV_PCM_TRIGGER_SUSPEND:
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case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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cv1800b_dac_enable(priv, false);
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static const struct snd_soc_dai_ops cv1800b_dac_dai_ops = {
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.hw_params = cv1800b_dac_hw_params,
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.trigger = cv1800b_dac_dai_trigger,
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};
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static struct snd_soc_dai_driver cv1800b_dac_dai = {
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.name = "dac-hifi",
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.playback = { .stream_name = "DAC Playback",
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.channels_min = 2,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE },
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.ops = &cv1800b_dac_dai_ops,
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};
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static const struct snd_soc_component_driver cv1800b_dac_component = {
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.name = "cv1800b-dac-codec",
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};
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static int cv1800b_dac_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct cv1800b_priv *priv;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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priv->dev = dev;
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priv->regs = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(priv->regs))
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return PTR_ERR(priv->regs);
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platform_set_drvdata(pdev, priv);
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return devm_snd_soc_register_component(&pdev->dev,
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&cv1800b_dac_component,
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&cv1800b_dac_dai, 1);
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}
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static const struct of_device_id cv1800b_dac_of_match[] = {
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{ .compatible = "sophgo,cv1800b-sound-dac" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, cv1800b_dac_of_match);
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static struct platform_driver cv1800b_dac_driver = {
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.probe = cv1800b_dac_probe,
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.driver = {
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.name = "cv1800b-dac-codec",
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.of_match_table = cv1800b_dac_of_match,
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},
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};
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module_platform_driver(cv1800b_dac_driver);
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MODULE_DESCRIPTION("DAC codec for CV1800B");
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MODULE_AUTHOR("Anton D. Stavinskii <stavinsky@gmail.com>");
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MODULE_LICENSE("GPL");
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