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ASoC: sunxi: add support for the on-chip codec on early Allwinner SoCs 

The sun4i, sun5i and sun7i SoC families have a built-in codec, capable
of both audio capture and playback.

While this is called a codec by Allwinner, it really is an in-SoC
combination of a codec and a DAI, with its own DAC/ADC and amplifiers
in a single memory-mapped controller.

The capture part has been left out for now, and will be added eventually.

Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Emilio López 2015-09-12 15:26:24 +02:00 committed by Mark Brown
parent 4ec73d3c81
commit 45fb6b6f2a
5 changed files with 735 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
sound/soc/Kconfig
View File

@ -58,6 +58,7 @@ source "sound/soc/sh/Kconfig"
source "sound/soc/sirf/Kconfig"
source "sound/soc/spear/Kconfig"
source "sound/soc/sti/Kconfig"
source "sound/soc/sunxi/Kconfig"
source "sound/soc/tegra/Kconfig"
source "sound/soc/txx9/Kconfig"
source "sound/soc/ux500/Kconfig"

1
sound/soc/Makefile
View File

@ -40,6 +40,7 @@ obj-$(CONFIG_SND_SOC) += sh/
obj-$(CONFIG_SND_SOC) += sirf/
obj-$(CONFIG_SND_SOC) += spear/
obj-$(CONFIG_SND_SOC) += sti/
obj-$(CONFIG_SND_SOC) += sunxi/
obj-$(CONFIG_SND_SOC) += tegra/
obj-$(CONFIG_SND_SOC) += txx9/
obj-$(CONFIG_SND_SOC) += ux500/

11
sound/soc/sunxi/Kconfig Normal file
View File

@ -0,0 +1,11 @@
menu "Allwinner SoC Audio support"
config SND_SUN4I_CODEC
tristate "Allwinner A10 Codec Support"
select SND_SOC_GENERIC_DMAENGINE_PCM
select REGMAP_MMIO
help
Select Y or M to add support for the Codec embedded in the Allwinner
A10 and affiliated SoCs.
endmenu

2
sound/soc/sunxi/Makefile Normal file
View File

@ -0,0 +1,2 @@
obj-$(CONFIG_SND_SUN4I_CODEC) += sun4i-codec.o

720
sound/soc/sunxi/sun4i-codec.c Normal file
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@ -0,0 +1,720 @@
/*
* Copyright 2014 Emilio López <emilio@elopez.com.ar>
* Copyright 2014 Jon Smirl <jonsmirl@gmail.com>
* Copyright 2015 Maxime Ripard <maxime.ripard@free-electrons.com>
*
* Based on the Allwinner SDK driver, released under the GPL.
*
* 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/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/clk.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/initval.h>
#include <sound/dmaengine_pcm.h>
/* Codec DAC register offsets and bit fields */
#define SUN4I_CODEC_DAC_DPC (0x00)
#define SUN4I_CODEC_DAC_DPC_EN_DA (31)
#define SUN4I_CODEC_DAC_DPC_DVOL (12)
#define SUN4I_CODEC_DAC_FIFOC (0x04)
#define SUN4I_CODEC_DAC_FIFOC_DAC_FS (29)
#define SUN4I_CODEC_DAC_FIFOC_FIR_VERSION (28)
#define SUN4I_CODEC_DAC_FIFOC_SEND_LASAT (26)
#define SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE (24)
#define SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT (21)
#define SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL (8)
#define SUN4I_CODEC_DAC_FIFOC_MONO_EN (6)
#define SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS (5)
#define SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN (4)
#define SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH (0)
#define SUN4I_CODEC_DAC_FIFOS (0x08)
#define SUN4I_CODEC_DAC_TXDATA (0x0c)
#define SUN4I_CODEC_DAC_ACTL (0x10)
#define SUN4I_CODEC_DAC_ACTL_DACAENR (31)
#define SUN4I_CODEC_DAC_ACTL_DACAENL (30)
#define SUN4I_CODEC_DAC_ACTL_MIXEN (29)
#define SUN4I_CODEC_DAC_ACTL_LDACLMIXS (15)
#define SUN4I_CODEC_DAC_ACTL_RDACRMIXS (14)
#define SUN4I_CODEC_DAC_ACTL_LDACRMIXS (13)
#define SUN4I_CODEC_DAC_ACTL_DACPAS (8)
#define SUN4I_CODEC_DAC_ACTL_MIXPAS (7)
#define SUN4I_CODEC_DAC_ACTL_PA_MUTE (6)
#define SUN4I_CODEC_DAC_ACTL_PA_VOL (0)
#define SUN4I_CODEC_DAC_TUNE (0x14)
#define SUN4I_CODEC_DAC_DEBUG (0x18)
/* Codec ADC register offsets and bit fields */
#define SUN4I_CODEC_ADC_FIFOC (0x1c)
#define SUN4I_CODEC_ADC_FIFOC_EN_AD (28)
#define SUN4I_CODEC_ADC_FIFOC_RX_FIFO_MODE (24)
#define SUN4I_CODEC_ADC_FIFOC_RX_TRIG_LEVEL (8)
#define SUN4I_CODEC_ADC_FIFOC_MONO_EN (7)
#define SUN4I_CODEC_ADC_FIFOC_RX_SAMPLE_BITS (6)
#define SUN4I_CODEC_ADC_FIFOC_ADC_DRQ_EN (4)
#define SUN4I_CODEC_ADC_FIFOC_FIFO_FLUSH (0)
#define SUN4I_CODEC_ADC_FIFOS (0x20)
#define SUN4I_CODEC_ADC_RXDATA (0x24)
#define SUN4I_CODEC_ADC_ACTL (0x28)
#define SUN4I_CODEC_ADC_ACTL_ADC_R_EN (31)
#define SUN4I_CODEC_ADC_ACTL_ADC_L_EN (30)
#define SUN4I_CODEC_ADC_ACTL_PREG1EN (29)
#define SUN4I_CODEC_ADC_ACTL_PREG2EN (28)
#define SUN4I_CODEC_ADC_ACTL_VMICEN (27)
#define SUN4I_CODEC_ADC_ACTL_VADCG (20)
#define SUN4I_CODEC_ADC_ACTL_ADCIS (17)
#define SUN4I_CODEC_ADC_ACTL_PA_EN (4)
#define SUN4I_CODEC_ADC_ACTL_DDE (3)
#define SUN4I_CODEC_ADC_DEBUG (0x2c)
/* Other various ADC registers */
#define SUN4I_CODEC_DAC_TXCNT (0x30)
#define SUN4I_CODEC_ADC_RXCNT (0x34)
#define SUN4I_CODEC_AC_SYS_VERI (0x38)
#define SUN4I_CODEC_AC_MIC_PHONE_CAL (0x3c)
struct sun4i_codec {
struct device *dev;
struct regmap *regmap;
struct clk *clk_apb;
struct clk *clk_module;
struct snd_dmaengine_dai_dma_data playback_dma_data;
};
static void sun4i_codec_start_playback(struct sun4i_codec *scodec)
{
/*
* FIXME: according to the BSP, we might need to drive a PA
* GPIO high here on some boards
*/
/* Flush TX FIFO */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
/* Enable DAC DRQ */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN));
}
static void sun4i_codec_stop_playback(struct sun4i_codec *scodec)
{
/*
* FIXME: according to the BSP, we might need to drive a PA
* GPIO low here on some boards
*/
/* Disable DAC DRQ */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_DAC_DRQ_EN),
0);
}
static int sun4i_codec_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -ENOTSUPP;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
sun4i_codec_start_playback(scodec);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
sun4i_codec_stop_playback(scodec);
break;
default:
return -EINVAL;
}
return 0;
}
static int sun4i_codec_prepare(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
u32 val;
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -ENOTSUPP;
/* Flush the TX FIFO */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH),
BIT(SUN4I_CODEC_DAC_FIFOC_FIFO_FLUSH));
/* Set TX FIFO Empty Trigger Level */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
0x3f << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL,
0xf << SUN4I_CODEC_DAC_FIFOC_TX_TRIG_LEVEL);
if (substream->runtime->rate > 32000)
/* Use 64 bits FIR filter */
val = 0;
else
/* Use 32 bits FIR filter */
val = BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION);
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_FIR_VERSION),
val);
/* Send zeros when we have an underrun */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_SEND_LASAT),
0);
return 0;
}
static unsigned long sun4i_codec_get_mod_freq(struct snd_pcm_hw_params *params)
{
unsigned int rate = params_rate(params);
switch (rate) {
case 176400:
case 88200:
case 44100:
case 33075:
case 22050:
case 14700:
case 11025:
case 7350:
return 22579200;
case 192000:
case 96000:
case 48000:
case 32000:
case 24000:
case 16000:
case 12000:
case 8000:
return 24576000;
default:
return 0;
}
}
static int sun4i_codec_get_hw_rate(struct snd_pcm_hw_params *params)
{
unsigned int rate = params_rate(params);
switch (rate) {
case 192000:
case 176400:
return 6;
case 96000:
case 88200:
return 7;
case 48000:
case 44100:
return 0;
case 32000:
case 33075:
return 1;
case 24000:
case 22050:
return 2;
case 16000:
case 14700:
return 3;
case 12000:
case 11025:
return 4;
case 8000:
case 7350:
return 5;
default:
return -EINVAL;
}
}
static int sun4i_codec_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
unsigned long clk_freq;
int hwrate;
u32 val;
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
return -ENOTSUPP;
clk_freq = sun4i_codec_get_mod_freq(params);
if (!clk_freq)
return -EINVAL;
if (clk_set_rate(scodec->clk_module, clk_freq))
return -EINVAL;
hwrate = sun4i_codec_get_hw_rate(params);
if (hwrate < 0)
return hwrate;
/* Set DAC sample rate */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
7 << SUN4I_CODEC_DAC_FIFOC_DAC_FS,
hwrate << SUN4I_CODEC_DAC_FIFOC_DAC_FS);
/* Set the number of channels we want to use */
if (params_channels(params) == 1)
val = BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN);
else
val = 0;
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_MONO_EN),
val);
/* Set the number of sample bits to either 16 or 24 bits */
if (hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min == 32) {
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS));
/* Set TX FIFO mode to padding the LSBs with 0 */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
0);
scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
} else {
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_SAMPLE_BITS),
0);
/* Set TX FIFO mode to repeat the MSB */
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE),
BIT(SUN4I_CODEC_DAC_FIFOC_TX_FIFO_MODE));
scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
}
return 0;
}
static int sun4i_codec_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
/*
* Stop issuing DRQ when we have room for less than 16 samples
* in our TX FIFO
*/
regmap_update_bits(scodec->regmap, SUN4I_CODEC_DAC_FIFOC,
3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT,
3 << SUN4I_CODEC_DAC_FIFOC_DRQ_CLR_CNT);
return clk_prepare_enable(scodec->clk_module);
}
static void sun4i_codec_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(rtd->card);
clk_disable_unprepare(scodec->clk_module);
}
static const struct snd_soc_dai_ops sun4i_codec_dai_ops = {
.startup = sun4i_codec_startup,
.shutdown = sun4i_codec_shutdown,
.trigger = sun4i_codec_trigger,
.hw_params = sun4i_codec_hw_params,
.prepare = sun4i_codec_prepare,
};
static struct snd_soc_dai_driver sun4i_codec_dai = {
.name = "Codec",
.ops = &sun4i_codec_dai_ops,
.playback = {
.stream_name = "Codec Playback",
.channels_min = 1,
.channels_max = 2,
.rate_min = 8000,
.rate_max = 192000,
.rates = SNDRV_PCM_RATE_8000_48000 |
SNDRV_PCM_RATE_96000 |
SNDRV_PCM_RATE_192000 |
SNDRV_PCM_RATE_KNOT,
.formats = SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S32_LE,
.sig_bits = 24,
},
};
/*** Codec ***/
static const struct snd_kcontrol_new sun4i_codec_pa_mute =
SOC_DAPM_SINGLE("Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_PA_MUTE, 1, 0);
static DECLARE_TLV_DB_SCALE(sun4i_codec_pa_volume_scale, -6300, 100, 1);
static const struct snd_kcontrol_new sun4i_codec_widgets[] = {
SOC_SINGLE_TLV("PA Volume", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_PA_VOL, 0x3F, 0,
sun4i_codec_pa_volume_scale),
};
static const struct snd_kcontrol_new sun4i_codec_left_mixer_controls[] = {
SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_LDACLMIXS, 1, 0),
};
static const struct snd_kcontrol_new sun4i_codec_right_mixer_controls[] = {
SOC_DAPM_SINGLE("Right DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_RDACRMIXS, 1, 0),
SOC_DAPM_SINGLE("Left DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_LDACRMIXS, 1, 0),
};
static const struct snd_kcontrol_new sun4i_codec_pa_mixer_controls[] = {
SOC_DAPM_SINGLE("DAC Playback Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_DACPAS, 1, 0),
SOC_DAPM_SINGLE("Mixer Playback Switch", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_MIXPAS, 1, 0),
};
static const struct snd_soc_dapm_widget sun4i_codec_dapm_widgets[] = {
/* Digital parts of the DACs */
SND_SOC_DAPM_SUPPLY("DAC", SUN4I_CODEC_DAC_DPC,
SUN4I_CODEC_DAC_DPC_EN_DA, 0,
NULL, 0),
/* Analog parts of the DACs */
SND_SOC_DAPM_DAC("Left DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_DACAENL, 0),
SND_SOC_DAPM_DAC("Right DAC", "Codec Playback", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_DACAENR, 0),
/* Mixers */
SND_SOC_DAPM_MIXER("Left Mixer", SND_SOC_NOPM, 0, 0,
sun4i_codec_left_mixer_controls,
ARRAY_SIZE(sun4i_codec_left_mixer_controls)),
SND_SOC_DAPM_MIXER("Right Mixer", SND_SOC_NOPM, 0, 0,
sun4i_codec_right_mixer_controls,
ARRAY_SIZE(sun4i_codec_right_mixer_controls)),
/* Global Mixer Enable */
SND_SOC_DAPM_SUPPLY("Mixer Enable", SUN4I_CODEC_DAC_ACTL,
SUN4I_CODEC_DAC_ACTL_MIXEN, 0, NULL, 0),
/* Pre-Amplifier */
SND_SOC_DAPM_MIXER("Pre-Amplifier", SUN4I_CODEC_ADC_ACTL,
SUN4I_CODEC_ADC_ACTL_PA_EN, 0,
sun4i_codec_pa_mixer_controls,
ARRAY_SIZE(sun4i_codec_pa_mixer_controls)),
SND_SOC_DAPM_SWITCH("Pre-Amplifier Mute", SND_SOC_NOPM, 0, 0,
&sun4i_codec_pa_mute),
SND_SOC_DAPM_OUTPUT("HP Right"),
SND_SOC_DAPM_OUTPUT("HP Left"),
};
static const struct snd_soc_dapm_route sun4i_codec_dapm_routes[] = {
/* Left DAC Routes */
{ "Left DAC", NULL, "DAC" },
/* Right DAC Routes */
{ "Right DAC", NULL, "DAC" },
/* Right Mixer Routes */
{ "Right Mixer", NULL, "Mixer Enable" },
{ "Right Mixer", "Left DAC Playback Switch", "Left DAC" },
{ "Right Mixer", "Right DAC Playback Switch", "Right DAC" },
/* Left Mixer Routes */
{ "Left Mixer", NULL, "Mixer Enable" },
{ "Left Mixer", "Left DAC Playback Switch", "Left DAC" },
/* Pre-Amplifier Mixer Routes */
{ "Pre-Amplifier", "Mixer Playback Switch", "Left Mixer" },
{ "Pre-Amplifier", "Mixer Playback Switch", "Right Mixer" },
{ "Pre-Amplifier", "DAC Playback Switch", "Left DAC" },
{ "Pre-Amplifier", "DAC Playback Switch", "Right DAC" },
/* PA -> HP path */
{ "Pre-Amplifier Mute", "Switch", "Pre-Amplifier" },
{ "HP Right", NULL, "Pre-Amplifier Mute" },
{ "HP Left", NULL, "Pre-Amplifier Mute" },
};
static struct snd_soc_codec_driver sun4i_codec_codec = {
.controls = sun4i_codec_widgets,
.num_controls = ARRAY_SIZE(sun4i_codec_widgets),
.dapm_widgets = sun4i_codec_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(sun4i_codec_dapm_widgets),
.dapm_routes = sun4i_codec_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(sun4i_codec_dapm_routes),
};
static const struct snd_soc_component_driver sun4i_codec_component = {
.name = "sun4i-codec",
};
#define SUN4I_CODEC_RATES SNDRV_PCM_RATE_8000_192000
#define SUN4I_CODEC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static int sun4i_codec_dai_probe(struct snd_soc_dai *dai)
{
struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
snd_soc_dai_init_dma_data(dai, &scodec->playback_dma_data,
NULL);
return 0;
}
static struct snd_soc_dai_driver dummy_cpu_dai = {
.name = "sun4i-codec-cpu-dai",
.probe = sun4i_codec_dai_probe,
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = SUN4I_CODEC_RATES,
.formats = SUN4I_CODEC_FORMATS,
.sig_bits = 24,
},
};
static const struct regmap_config sun4i_codec_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = SUN4I_CODEC_AC_MIC_PHONE_CAL,
};
static const struct of_device_id sun4i_codec_of_match[] = {
{ .compatible = "allwinner,sun4i-a10-codec" },
{ .compatible = "allwinner,sun7i-a20-codec" },
{}
};
MODULE_DEVICE_TABLE(of, sun4i_codec_of_match);
static struct snd_soc_dai_link *sun4i_codec_create_link(struct device *dev,
int *num_links)
{
struct snd_soc_dai_link *link = devm_kzalloc(dev, sizeof(*link),
GFP_KERNEL);
if (!link)
return NULL;
link->name = "cdc";
link->stream_name = "CDC PCM";
link->codec_dai_name = "Codec";
link->cpu_dai_name = dev_name(dev);
link->codec_name = dev_name(dev);
link->platform_name = dev_name(dev);
link->dai_fmt = SND_SOC_DAIFMT_I2S;
*num_links = 1;
return link;
};
static struct snd_soc_card *sun4i_codec_create_card(struct device *dev)
{
struct snd_soc_card *card;
int ret;
card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
if (!card)
return NULL;
card->dai_link = sun4i_codec_create_link(dev, &card->num_links);
if (!card->dai_link)
return NULL;
card->dev = dev;
card->name = "sun4i-codec";
ret = snd_soc_of_parse_audio_routing(card, "routing");
if (ret) {
dev_err(dev, "Failed to create our audio routing\n");
return NULL;
}
return card;
};
static int sun4i_codec_probe(struct platform_device *pdev)
{
struct snd_soc_card *card;
struct sun4i_codec *scodec;
struct resource *res;
void __iomem *base;
int ret;
scodec = devm_kzalloc(&pdev->dev, sizeof(*scodec), GFP_KERNEL);
if (!scodec)
return -ENOMEM;
scodec->dev = &pdev->dev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
base = devm_ioremap_resource(&pdev->dev, res);
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,
&sun4i_codec_regmap_config);
if (IS_ERR(scodec->regmap)) {
dev_err(&pdev->dev, "Failed to create our regmap\n");
return PTR_ERR(scodec->regmap);
}
/* Get the clocks from the DT */
scodec->clk_apb = devm_clk_get(&pdev->dev, "apb");
if (IS_ERR(scodec->clk_apb)) {
dev_err(&pdev->dev, "Failed to get the APB clock\n");
return PTR_ERR(scodec->clk_apb);
}
scodec->clk_module = devm_clk_get(&pdev->dev, "codec");
if (IS_ERR(scodec->clk_module)) {
dev_err(&pdev->dev, "Failed to get the module clock\n");
return PTR_ERR(scodec->clk_module);
}
/* Enable the bus clock */
if (clk_prepare_enable(scodec->clk_apb)) {
dev_err(&pdev->dev, "Failed to enable the APB clock\n");
return -EINVAL;
}
/* DMA configuration for TX FIFO */
scodec->playback_dma_data.addr = res->start + SUN4I_CODEC_DAC_TXDATA;
scodec->playback_dma_data.maxburst = 4;
scodec->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
ret = snd_soc_register_codec(&pdev->dev, &sun4i_codec_codec,
&sun4i_codec_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Failed to register our codec\n");
goto err_clk_disable;
}
ret = devm_snd_soc_register_component(&pdev->dev,
&sun4i_codec_component,
&dummy_cpu_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Failed to register our DAI\n");
goto err_unregister_codec;
}
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "Failed to register against DMAEngine\n");
goto err_unregister_codec;
}
card = sun4i_codec_create_card(&pdev->dev);
if (!card) {
dev_err(&pdev->dev, "Failed to create our card\n");
goto err_unregister_codec;
}
platform_set_drvdata(pdev, card);
snd_soc_card_set_drvdata(card, scodec);
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "Failed to register our card\n");
goto err_unregister_codec;
}
return 0;
err_unregister_codec:
snd_soc_unregister_codec(&pdev->dev);
err_clk_disable:
clk_disable_unprepare(scodec->clk_apb);
return ret;
}
static int sun4i_codec_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
struct sun4i_codec *scodec = snd_soc_card_get_drvdata(card);
snd_soc_unregister_card(card);
snd_soc_unregister_codec(&pdev->dev);
clk_disable_unprepare(scodec->clk_apb);
return 0;
}
static struct platform_driver sun4i_codec_driver = {
.driver = {
.name = "sun4i-codec",
.owner = THIS_MODULE,
.of_match_table = sun4i_codec_of_match,
},
.probe = sun4i_codec_probe,
.remove = sun4i_codec_remove,
};
module_platform_driver(sun4i_codec_driver);
MODULE_DESCRIPTION("Allwinner A10 codec driver");
MODULE_AUTHOR("Emilio López <emilio@elopez.com.ar>");
MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
MODULE_LICENSE("GPL");