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linux/sound/soc/sunxi/sun8i-codec.c
Maxime Ripard 316b7758c9
ASoC: sun8i-codec: Set the BCLK divider 
While the current code was reporting to be able to work in master mode, it
failed to do so because the BCLK divider wasn't programmed, meaning that
the BCLK would run at the PLL's frequency no matter the sample rate.

It was obviously a bit too fast.

Add support to retrieve the divider to use, and set it. Since our PLL is
not always able to generate a perfect multiple of the sample rate, we'll
have to choose the closest divider that matches our setup.

Fixes: 36c684936f ("ASoC: Add sun8i digital audio codec")
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: <stable@vger.kernel.org>
2017-11-09 11:41:37 +00:00

541 lines
15 KiB
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/*
* This driver supports the digital controls for the internal codec
* found in Allwinner's A33 SoCs.
*
* (C) Copyright 2010-2016
* Reuuimlla Technology Co., Ltd. <www.reuuimllatech.com>
* huangxin <huangxin@Reuuimllatech.com>
* Mylène Josserand <mylene.josserand@free-electrons.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#define SUN8I_SYSCLK_CTL 0x00c
#define SUN8I_SYSCLK_CTL_AIF1CLK_ENA 11
#define SUN8I_SYSCLK_CTL_AIF1CLK_SRC_PLL 9
#define SUN8I_SYSCLK_CTL_AIF1CLK_SRC 8
#define SUN8I_SYSCLK_CTL_SYSCLK_ENA 3
#define SUN8I_SYSCLK_CTL_SYSCLK_SRC 0
#define SUN8I_MOD_CLK_ENA 0x010
#define SUN8I_MOD_CLK_ENA_AIF1 15
#define SUN8I_MOD_CLK_ENA_DAC 2
#define SUN8I_MOD_RST_CTL 0x014
#define SUN8I_MOD_RST_CTL_AIF1 15
#define SUN8I_MOD_RST_CTL_DAC 2
#define SUN8I_SYS_SR_CTRL 0x018
#define SUN8I_SYS_SR_CTRL_AIF1_FS 12
#define SUN8I_SYS_SR_CTRL_AIF2_FS 8
#define SUN8I_AIF1CLK_CTRL 0x040
#define SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD 15
#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV 14
#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV 13
#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV 9
#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV 6
#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_16 (1 << 6)
#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ 4
#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16 (1 << 4)
#define SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT 2
#define SUN8I_AIF1_DACDAT_CTRL 0x048
#define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA 15
#define SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA 14
#define SUN8I_DAC_DIG_CTRL 0x120
#define SUN8I_DAC_DIG_CTRL_ENDA 15
#define SUN8I_DAC_MXR_SRC 0x130
#define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA0L 15
#define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA1L 14
#define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF2DACL 13
#define SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_ADCL 12
#define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA0R 11
#define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R 10
#define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR 9
#define SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR 8
#define SUN8I_SYS_SR_CTRL_AIF1_FS_MASK GENMASK(15, 12)
#define SUN8I_SYS_SR_CTRL_AIF2_FS_MASK GENMASK(11, 8)
#define SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK GENMASK(5, 4)
#define SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK GENMASK(8, 6)
#define SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK GENMASK(12, 9)
struct sun8i_codec {
struct device *dev;
struct regmap *regmap;
struct clk *clk_module;
struct clk *clk_bus;
};
static int sun8i_codec_runtime_resume(struct device *dev)
{
struct sun8i_codec *scodec = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(scodec->clk_module);
if (ret) {
dev_err(dev, "Failed to enable the module clock\n");
return ret;
}
ret = clk_prepare_enable(scodec->clk_bus);
if (ret) {
dev_err(dev, "Failed to enable the bus clock\n");
goto err_disable_modclk;
}
regcache_cache_only(scodec->regmap, false);
ret = regcache_sync(scodec->regmap);
if (ret) {
dev_err(dev, "Failed to sync regmap cache\n");
goto err_disable_clk;
}
return 0;
err_disable_clk:
clk_disable_unprepare(scodec->clk_bus);
err_disable_modclk:
clk_disable_unprepare(scodec->clk_module);
return ret;
}
static int sun8i_codec_runtime_suspend(struct device *dev)
{
struct sun8i_codec *scodec = dev_get_drvdata(dev);
regcache_cache_only(scodec->regmap, true);
regcache_mark_dirty(scodec->regmap);
clk_disable_unprepare(scodec->clk_module);
clk_disable_unprepare(scodec->clk_bus);
return 0;
}
static int sun8i_codec_get_hw_rate(struct snd_pcm_hw_params *params)
{
unsigned int rate = params_rate(params);
switch (rate) {
case 8000:
case 7350:
return 0x0;
case 11025:
return 0x1;
case 12000:
return 0x2;
case 16000:
return 0x3;
case 22050:
return 0x4;
case 24000:
return 0x5;
case 32000:
return 0x6;
case 44100:
return 0x7;
case 48000:
return 0x8;
case 96000:
return 0x9;
case 192000:
return 0xa;
default:
return -EINVAL;
}
}
static int sun8i_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct sun8i_codec *scodec = snd_soc_codec_get_drvdata(dai->codec);
u32 value;
/* clock masters */
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS: /* Codec slave, DAI master */
value = 0x1;
break;
case SND_SOC_DAIFMT_CBM_CFM: /* Codec Master, DAI slave */
value = 0x0;
break;
default:
return -EINVAL;
}
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
BIT(SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD),
value << SUN8I_AIF1CLK_CTRL_AIF1_MSTR_MOD);
/* clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF: /* Normal */
value = 0x0;
break;
case SND_SOC_DAIFMT_IB_IF: /* Inversion */
value = 0x1;
break;
default:
return -EINVAL;
}
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
BIT(SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV),
value << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_INV);
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
BIT(SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV),
value << SUN8I_AIF1CLK_CTRL_AIF1_LRCK_INV);
/* DAI format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
value = 0x0;
break;
case SND_SOC_DAIFMT_LEFT_J:
value = 0x1;
break;
case SND_SOC_DAIFMT_RIGHT_J:
value = 0x2;
break;
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
value = 0x3;
break;
default:
return -EINVAL;
}
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
BIT(SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT),
value << SUN8I_AIF1CLK_CTRL_AIF1_DATA_FMT);
return 0;
}
struct sun8i_codec_clk_div {
u8 div;
u8 val;
};
static const struct sun8i_codec_clk_div sun8i_codec_bclk_div[] = {
{ .div = 1, .val = 0 },
{ .div = 2, .val = 1 },
{ .div = 4, .val = 2 },
{ .div = 6, .val = 3 },
{ .div = 8, .val = 4 },
{ .div = 12, .val = 5 },
{ .div = 16, .val = 6 },
{ .div = 24, .val = 7 },
{ .div = 32, .val = 8 },
{ .div = 48, .val = 9 },
{ .div = 64, .val = 10 },
{ .div = 96, .val = 11 },
{ .div = 128, .val = 12 },
{ .div = 192, .val = 13 },
};
static u8 sun8i_codec_get_bclk_div(struct sun8i_codec *scodec,
unsigned int rate,
unsigned int word_size)
{
unsigned long clk_rate = clk_get_rate(scodec->clk_module);
unsigned int div = clk_rate / rate / word_size / 2;
unsigned int best_val = 0, best_diff = ~0;
int i;
for (i = 0; i < ARRAY_SIZE(sun8i_codec_bclk_div); i++) {
const struct sun8i_codec_clk_div *bdiv = &sun8i_codec_bclk_div[i];
unsigned int diff = abs(bdiv->div - div);
if (diff < best_diff) {
best_diff = diff;
best_val = bdiv->val;
}
}
return best_val;
}
static int sun8i_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sun8i_codec *scodec = snd_soc_codec_get_drvdata(dai->codec);
int sample_rate;
u8 bclk_div;
/*
* The CPU DAI handles only a sample of 16 bits. Configure the
* codec to handle this type of sample resolution.
*/
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_MASK,
SUN8I_AIF1CLK_CTRL_AIF1_WORD_SIZ_16);
bclk_div = sun8i_codec_get_bclk_div(scodec, params_rate(params), 16);
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV_MASK,
bclk_div << SUN8I_AIF1CLK_CTRL_AIF1_BCLK_DIV);
regmap_update_bits(scodec->regmap, SUN8I_AIF1CLK_CTRL,
SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_MASK,
SUN8I_AIF1CLK_CTRL_AIF1_LRCK_DIV_16);
sample_rate = sun8i_codec_get_hw_rate(params);
if (sample_rate < 0)
return sample_rate;
regmap_update_bits(scodec->regmap, SUN8I_SYS_SR_CTRL,
SUN8I_SYS_SR_CTRL_AIF1_FS_MASK,
sample_rate << SUN8I_SYS_SR_CTRL_AIF1_FS);
regmap_update_bits(scodec->regmap, SUN8I_SYS_SR_CTRL,
SUN8I_SYS_SR_CTRL_AIF2_FS_MASK,
sample_rate << SUN8I_SYS_SR_CTRL_AIF2_FS);
return 0;
}
static const struct snd_kcontrol_new sun8i_dac_mixer_controls[] = {
SOC_DAPM_DOUBLE("AIF1 Slot 0 Digital DAC Playback Switch",
SUN8I_DAC_MXR_SRC,
SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA0L,
SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA0R, 1, 0),
SOC_DAPM_DOUBLE("AIF1 Slot 1 Digital DAC Playback Switch",
SUN8I_DAC_MXR_SRC,
SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF1DA1L,
SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF1DA1R, 1, 0),
SOC_DAPM_DOUBLE("AIF2 Digital DAC Playback Switch", SUN8I_DAC_MXR_SRC,
SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_AIF2DACL,
SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_AIF2DACR, 1, 0),
SOC_DAPM_DOUBLE("ADC Digital DAC Playback Switch", SUN8I_DAC_MXR_SRC,
SUN8I_DAC_MXR_SRC_DACL_MXR_SRC_ADCL,
SUN8I_DAC_MXR_SRC_DACR_MXR_SRC_ADCR, 1, 0),
};
static const struct snd_soc_dapm_widget sun8i_codec_dapm_widgets[] = {
/* Digital parts of the DACs */
SND_SOC_DAPM_SUPPLY("DAC", SUN8I_DAC_DIG_CTRL, SUN8I_DAC_DIG_CTRL_ENDA,
0, NULL, 0),
/* Analog DAC AIF */
SND_SOC_DAPM_AIF_IN("AIF1 Slot 0 Left", "Playback", 0,
SUN8I_AIF1_DACDAT_CTRL,
SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0L_ENA, 0),
SND_SOC_DAPM_AIF_IN("AIF1 Slot 0 Right", "Playback", 0,
SUN8I_AIF1_DACDAT_CTRL,
SUN8I_AIF1_DACDAT_CTRL_AIF1_DA0R_ENA, 0),
/* DAC Mixers */
SOC_MIXER_ARRAY("Left Digital DAC Mixer", SND_SOC_NOPM, 0, 0,
sun8i_dac_mixer_controls),
SOC_MIXER_ARRAY("Right Digital DAC Mixer", SND_SOC_NOPM, 0, 0,
sun8i_dac_mixer_controls),
/* Clocks */
SND_SOC_DAPM_SUPPLY("MODCLK AFI1", SUN8I_MOD_CLK_ENA,
SUN8I_MOD_CLK_ENA_AIF1, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("MODCLK DAC", SUN8I_MOD_CLK_ENA,
SUN8I_MOD_CLK_ENA_DAC, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("AIF1", SUN8I_SYSCLK_CTL,
SUN8I_SYSCLK_CTL_AIF1CLK_ENA, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("SYSCLK", SUN8I_SYSCLK_CTL,
SUN8I_SYSCLK_CTL_SYSCLK_ENA, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("AIF1 PLL", SUN8I_SYSCLK_CTL,
SUN8I_SYSCLK_CTL_AIF1CLK_SRC_PLL, 0, NULL, 0),
/* Inversion as 0=AIF1, 1=AIF2 */
SND_SOC_DAPM_SUPPLY("SYSCLK AIF1", SUN8I_SYSCLK_CTL,
SUN8I_SYSCLK_CTL_SYSCLK_SRC, 1, NULL, 0),
/* Module reset */
SND_SOC_DAPM_SUPPLY("RST AIF1", SUN8I_MOD_RST_CTL,
SUN8I_MOD_RST_CTL_AIF1, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("RST DAC", SUN8I_MOD_RST_CTL,
SUN8I_MOD_RST_CTL_DAC, 0, NULL, 0),
};
static const struct snd_soc_dapm_route sun8i_codec_dapm_routes[] = {
/* Clock Routes */
{ "AIF1", NULL, "SYSCLK AIF1" },
{ "AIF1 PLL", NULL, "AIF1" },
{ "RST AIF1", NULL, "AIF1 PLL" },
{ "MODCLK AFI1", NULL, "RST AIF1" },
{ "DAC", NULL, "MODCLK AFI1" },
{ "RST DAC", NULL, "SYSCLK" },
{ "MODCLK DAC", NULL, "RST DAC" },
{ "DAC", NULL, "MODCLK DAC" },
/* DAC Routes */
{ "AIF1 Slot 0 Right", NULL, "DAC" },
{ "AIF1 Slot 0 Left", NULL, "DAC" },
/* DAC Mixer Routes */
{ "Left Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch",
"AIF1 Slot 0 Left"},
{ "Right Digital DAC Mixer", "AIF1 Slot 0 Digital DAC Playback Switch",
"AIF1 Slot 0 Right"},
};
static const struct snd_soc_dai_ops sun8i_codec_dai_ops = {
.hw_params = sun8i_codec_hw_params,
.set_fmt = sun8i_set_fmt,
};
static struct snd_soc_dai_driver sun8i_codec_dai = {
.name = "sun8i",
/* playback capabilities */
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
},
/* pcm operations */
.ops = &sun8i_codec_dai_ops,
};
static const struct snd_soc_codec_driver sun8i_soc_codec = {
.component_driver = {
.dapm_widgets = sun8i_codec_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(sun8i_codec_dapm_widgets),
.dapm_routes = sun8i_codec_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(sun8i_codec_dapm_routes),
},
};
static const struct regmap_config sun8i_codec_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = SUN8I_DAC_MXR_SRC,
.cache_type = REGCACHE_FLAT,
};
static int sun8i_codec_probe(struct platform_device *pdev)
{
struct resource *res_base;
struct sun8i_codec *scodec;
void __iomem *base;
int ret;
scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL);
if (!scodec)
return -ENOMEM;
scodec->dev = &pdev->dev;
scodec->clk_module = devm_clk_get(&pdev->dev, "mod");
if (IS_ERR(scodec->clk_module)) {
dev_err(&pdev->dev, "Failed to get the module clock\n");
return PTR_ERR(scodec->clk_module);
}
scodec->clk_bus = devm_clk_get(&pdev->dev, "bus");
if (IS_ERR(scodec->clk_bus)) {
dev_err(&pdev->dev, "Failed to get the bus clock\n");
return PTR_ERR(scodec->clk_bus);
}
res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res_base);
if (IS_ERR(base)) {
dev_err(&pdev->dev, "Failed to map the registers\n");
return PTR_ERR(base);
}
scodec->regmap = devm_regmap_init_mmio(&pdev->dev, base,
&sun8i_codec_regmap_config);
if (IS_ERR(scodec->regmap)) {
dev_err(&pdev->dev, "Failed to create our regmap\n");
return PTR_ERR(scodec->regmap);
}
platform_set_drvdata(pdev, scodec);
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = sun8i_codec_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
ret = snd_soc_register_codec(&pdev->dev, &sun8i_soc_codec,
&sun8i_codec_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Failed to register codec\n");
goto err_suspend;
}
return ret;
err_suspend:
if (!pm_runtime_status_suspended(&pdev->dev))
sun8i_codec_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
return ret;
}
static int sun8i_codec_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct sun8i_codec *scodec = snd_soc_card_get_drvdata(card);
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
sun8i_codec_runtime_suspend(&pdev->dev);
snd_soc_unregister_codec(&pdev->dev);
clk_disable_unprepare(scodec->clk_module);
clk_disable_unprepare(scodec->clk_bus);
return 0;
}
static const struct of_device_id sun8i_codec_of_match[] = {
{ .compatible = "allwinner,sun8i-a33-codec" },
{}
};
MODULE_DEVICE_TABLE(of, sun8i_codec_of_match);
static const struct dev_pm_ops sun8i_codec_pm_ops = {
SET_RUNTIME_PM_OPS(sun8i_codec_runtime_suspend,
sun8i_codec_runtime_resume, NULL)
};
static struct platform_driver sun8i_codec_driver = {
.driver = {
.name = "sun8i-codec",
.of_match_table = sun8i_codec_of_match,
.pm = &sun8i_codec_pm_ops,
},
.probe = sun8i_codec_probe,
.remove = sun8i_codec_remove,
};
module_platform_driver(sun8i_codec_driver);
MODULE_DESCRIPTION("Allwinner A33 (sun8i) codec driver");
MODULE_AUTHOR("Mylène Josserand <mylene.josserand@free-electrons.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:sun8i-codec");
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