[alsa-devel] [PATCH] ASoc: wm8580: Add the wm8581 codec to the driver
Matt Flax
flatmax at flatmax.org
Mon Oct 17 00:42:18 CEST 2016
This patch adds support for the wm8581 codec to the wm8580 driver.
The wm8581 codec hardware adds a fourth DAC and otherwise is
compatible with the wm8580 codec.
of_device_id data is used to allow the driver to select the
suitable software variables from the device tree codec selection.
The wm8580_driver_data struct is used to store the number of DACs
as well as the required stream names for both codecs.
The snd_soc_dai_driver no longer lists the stream names and for
playback the channels_max. These variables are set during i2c
probe from the of_device_id supplied wm8580_driver_data struct.
With knowledge of the number of DACs in use, the DAC4 controls,
widgets and routes are added as required for DAC4.
The device tree documentation for the wm8580 is altered to list
the wm8581 codec support, as is the Kconfig file.
Signed-off-by: Matt Flax <flatmax at flatmax.org>
---
Documentation/devicetree/bindings/sound/wm8580.txt | 4 +-
sound/soc/codecs/Kconfig | 2 +-
sound/soc/codecs/wm8580.c | 96 +++++++++++++++++++---
sound/soc/codecs/wm8580.h | 6 ++
4 files changed, 94 insertions(+), 14 deletions(-)
diff --git a/Documentation/devicetree/bindings/sound/wm8580.txt b/Documentation/devicetree/bindings/sound/wm8580.txt
index 7d9821f..78fce9b 100644
--- a/Documentation/devicetree/bindings/sound/wm8580.txt
+++ b/Documentation/devicetree/bindings/sound/wm8580.txt
@@ -1,10 +1,10 @@
-WM8580 audio CODEC
+WM8580 and WM8581 audio CODEC
This device supports I2C only.
Required properties:
- - compatible : "wlf,wm8580"
+ - compatible : "wlf,wm8580", "wlf,wm8581"
- reg : the I2C address of the device.
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index c67667b..199bec8 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -914,7 +914,7 @@ config SND_SOC_WM8523
depends on I2C
config SND_SOC_WM8580
- tristate "Wolfson Microelectronics WM8523 CODEC"
+ tristate "Wolfson Microelectronics WM8580 and WM8581 CODECs"
depends on I2C
config SND_SOC_WM8711
diff --git a/sound/soc/codecs/wm8580.c b/sound/soc/codecs/wm8580.c
index faa7287..a348549 100644
--- a/sound/soc/codecs/wm8580.c
+++ b/sound/soc/codecs/wm8580.c
@@ -1,5 +1,5 @@
/*
- * wm8580.c -- WM8580 ALSA Soc Audio driver
+ * wm8580.c -- WM8580 and WM8581 ALSA Soc Audio driver
*
* Copyright 2008-12 Wolfson Microelectronics PLC.
*
@@ -12,6 +12,9 @@
* The WM8580 is a multichannel codec with S/PDIF support, featuring six
* DAC channels and two ADC channels.
*
+ * The WM8581 is a multichannel codec with S/PDIF support, featuring eight
+ * DAC channels and two ADC channels.
+ *
* Currently only the primary audio interface is supported - S/PDIF and
* the secondary audio interfaces are not.
*/
@@ -65,6 +68,8 @@
#define WM8580_DIGITAL_ATTENUATION_DACR2 0x17
#define WM8580_DIGITAL_ATTENUATION_DACL3 0x18
#define WM8580_DIGITAL_ATTENUATION_DACR3 0x19
+#define WM8580_DIGITAL_ATTENUATION_DACL4 0x1A
+#define WM8580_DIGITAL_ATTENUATION_DACR4 0x1B
#define WM8580_MASTER_DIGITAL_ATTENUATION 0x1C
#define WM8580_ADC_CONTROL1 0x1D
#define WM8580_SPDTXCHAN0 0x1E
@@ -242,6 +247,7 @@ struct wm8580_priv {
struct regulator_bulk_data supplies[WM8580_NUM_SUPPLIES];
struct pll_state a;
struct pll_state b;
+ const struct wm8580_driver_data *drvdata;
int sysclk[2];
};
@@ -306,6 +312,19 @@ SOC_DOUBLE("Capture Switch", WM8580_ADC_CONTROL1, 0, 1, 1, 1),
SOC_SINGLE("Capture High-Pass Filter Switch", WM8580_ADC_CONTROL1, 4, 1, 0),
};
+static const struct snd_kcontrol_new wm8580_dac4_snd_controls[] = {
+SOC_DOUBLE_R_EXT_TLV("DAC4 Playback Volume",
+ WM8580_DIGITAL_ATTENUATION_DACL4,
+ WM8580_DIGITAL_ATTENUATION_DACR4,
+ 0, 0xff, 0, snd_soc_get_volsw, wm8580_out_vu, dac_tlv),
+
+SOC_SINGLE("DAC4 Deemphasis Switch", WM8580_DAC_CONTROL3, 3, 1, 0),
+
+SOC_DOUBLE("DAC4 Invert Switch", WM8580_DAC_CONTROL4, 8, 7, 1, 0),
+
+SOC_SINGLE("DAC4 Switch", WM8580_DAC_CONTROL5, 3, 1, 1),
+};
+
static const struct snd_soc_dapm_widget wm8580_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC1", "Playback", WM8580_PWRDN1, 2, 1),
SND_SOC_DAPM_DAC("DAC2", "Playback", WM8580_PWRDN1, 3, 1),
@@ -324,6 +343,13 @@ SND_SOC_DAPM_INPUT("AINL"),
SND_SOC_DAPM_INPUT("AINR"),
};
+static const struct snd_soc_dapm_widget wm8580_dac4_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DAC4", "Playback", WM8580_PWRDN1, 5, 1),
+
+SND_SOC_DAPM_OUTPUT("VOUT4L"),
+SND_SOC_DAPM_OUTPUT("VOUT4R"),
+};
+
static const struct snd_soc_dapm_route wm8580_dapm_routes[] = {
{ "VOUT1L", NULL, "DAC1" },
{ "VOUT1R", NULL, "DAC1" },
@@ -338,6 +364,11 @@ static const struct snd_soc_dapm_route wm8580_dapm_routes[] = {
{ "ADC", NULL, "AINR" },
};
+static const struct snd_soc_dapm_route wm8580_dac4_dapm_routes[] = {
+ { "VOUT4L", NULL, "DAC4" },
+ { "VOUT4R", NULL, "DAC4" },
+};
+
/* PLL divisors */
struct _pll_div {
u32 prescale:1;
@@ -837,19 +868,16 @@ static const struct snd_soc_dai_ops wm8580_dai_ops_capture = {
static struct snd_soc_dai_driver wm8580_dai[] = {
{
- .name = "wm8580-hifi-playback",
.id = WM8580_DAI_PAIFRX,
.playback = {
.stream_name = "Playback",
.channels_min = 1,
- .channels_max = 6,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = WM8580_FORMATS,
},
.ops = &wm8580_dai_ops_playback,
},
{
- .name = "wm8580-hifi-capture",
.id = WM8580_DAI_PAIFTX,
.capture = {
.stream_name = "Capture",
@@ -865,8 +893,22 @@ static struct snd_soc_dai_driver wm8580_dai[] = {
static int wm8580_probe(struct snd_soc_codec *codec)
{
struct wm8580_priv *wm8580 = snd_soc_codec_get_drvdata(codec);
+ struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
int ret = 0;
+ switch (wm8580->drvdata->num_dacs) {
+ case 4:
+ snd_soc_add_codec_controls(codec, wm8580_dac4_snd_controls,
+ ARRAY_SIZE(wm8580_dac4_snd_controls));
+ snd_soc_dapm_new_controls(dapm, wm8580_dac4_dapm_widgets,
+ ARRAY_SIZE(wm8580_dac4_dapm_widgets));
+ snd_soc_dapm_add_routes(dapm, wm8580_dac4_dapm_routes,
+ ARRAY_SIZE(wm8580_dac4_dapm_routes));
+ break;
+ default:
+ break;
+ }
+
ret = regulator_bulk_enable(ARRAY_SIZE(wm8580->supplies),
wm8580->supplies);
if (ret != 0) {
@@ -914,12 +956,6 @@ static const struct snd_soc_codec_driver soc_codec_dev_wm8580 = {
},
};
-static const struct of_device_id wm8580_of_match[] = {
- { .compatible = "wlf,wm8580" },
- { },
-};
-MODULE_DEVICE_TABLE(of, wm8580_of_match);
-
static const struct regmap_config wm8580_regmap = {
.reg_bits = 7,
.val_bits = 9,
@@ -932,10 +968,32 @@ static const struct regmap_config wm8580_regmap = {
.volatile_reg = wm8580_volatile,
};
+const struct wm8580_driver_data wm8580_data = {
+ .name_playback = "wm8580-hifi-playback",
+ .name_capture = "wm8580-hifi-capture",
+ .num_dacs = 3,
+};
+EXPORT_SYMBOL_GPL(wm8580_data);
+
+const struct wm8580_driver_data wm8581_data = {
+ .name_playback = "wm8581-hifi-playback",
+ .name_capture = "wm8581-hifi-capture",
+ .num_dacs = 4,
+};
+EXPORT_SYMBOL_GPL(wm8581_data);
+
+static const struct of_device_id wm8580_of_match[] = {
+ { .compatible = "wlf,wm8580", .data = &wm8580_data },
+ { .compatible = "wlf,wm8581", .data = &wm8581_data },
+ { },
+};
+MODULE_DEVICE_TABLE(of, wm8580_of_match);
+
#if IS_ENABLED(CONFIG_I2C)
static int wm8580_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
+ const struct of_device_id *of_id;
struct wm8580_priv *wm8580;
int ret, i;
@@ -960,6 +1018,20 @@ static int wm8580_i2c_probe(struct i2c_client *i2c,
i2c_set_clientdata(i2c, wm8580);
+ of_id = of_match_device(wm8580_of_match, &i2c->dev);
+ if (of_id)
+ wm8580->drvdata = of_id->data;
+
+ if (!wm8580->drvdata) {
+ dev_err(&i2c->dev, "failed to find driver data\n");
+ return -EINVAL;
+ }
+
+ /* Each dac supports stereo input */
+ wm8580_dai[0].playback.channels_max = wm8580->drvdata->num_dacs * 2;
+ wm8580_dai[0].name = wm8580->drvdata->name_playback;
+ wm8580_dai[1].name = wm8580->drvdata->name_capture;
+
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8580, wm8580_dai, ARRAY_SIZE(wm8580_dai));
@@ -973,7 +1045,8 @@ static int wm8580_i2c_remove(struct i2c_client *client)
}
static const struct i2c_device_id wm8580_i2c_id[] = {
- { "wm8580", 0 },
+ { "wm8580", (kernel_ulong_t)&wm8580_data },
+ { "wm8581", (kernel_ulong_t)&wm8581_data },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8580_i2c_id);
@@ -1014,4 +1087,5 @@ module_exit(wm8580_exit);
MODULE_DESCRIPTION("ASoC WM8580 driver");
MODULE_AUTHOR("Mark Brown <broonie at opensource.wolfsonmicro.com>");
+MODULE_AUTHOR("Matt Flax <flatmax at flatmax.org>");
MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/wm8580.h b/sound/soc/codecs/wm8580.h
index 1d34656..868e400 100644
--- a/sound/soc/codecs/wm8580.h
+++ b/sound/soc/codecs/wm8580.h
@@ -15,6 +15,12 @@
#ifndef _WM8580_H
#define _WM8580_H
+struct wm8580_driver_data {
+ char name_playback[24];
+ char name_capture[24];
+ int num_dacs;
+};
+
#define WM8580_PLLA 1
#define WM8580_PLLB 2
--
2.7.4
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