Merge remote-tracking branches 'asoc/topic/wm8524', 'asoc/topic/wm8804' and 'asoc/topic/zte' into asoc-next
Mark Brown
8 years ago
commit
f5fd4a67be
@ -0,0 +1,16 @@ |
||||
WM8524 audio CODEC |
||||
|
||||
This device does not use I2C or SPI but a simple Hardware Control Interface. |
||||
|
||||
Required properties: |
||||
|
||||
- compatible : "wlf,wm8524" |
||||
|
||||
- wlf,mute-gpios: a GPIO spec for the MUTE pin. |
||||
|
||||
Example: |
||||
|
||||
codec: wm8524@0 { |
||||
compatible = "wlf,wm8524"; |
||||
wlf,mute-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>; |
||||
}; |
||||
@ -0,0 +1,261 @@ |
||||
/*
|
||||
* wm8524.c -- WM8524 ALSA SoC Audio driver |
||||
* |
||||
* Copyright 2009 Wolfson Microelectronics plc |
||||
* Copyright 2017 NXP |
||||
* |
||||
* Based on WM8523 ALSA SoC Audio driver written by Mark Brown |
||||
* |
||||
* This program is free software; you can redistribute it and/or modify |
||||
* it under the terms of the GNU General Public License version 2 as |
||||
* published by the Free Software Foundation. |
||||
*/ |
||||
|
||||
#include <linux/module.h> |
||||
#include <linux/moduleparam.h> |
||||
#include <linux/init.h> |
||||
#include <linux/delay.h> |
||||
#include <linux/slab.h> |
||||
#include <linux/gpio/consumer.h> |
||||
#include <linux/of_device.h> |
||||
#include <sound/core.h> |
||||
#include <sound/pcm.h> |
||||
#include <sound/pcm_params.h> |
||||
#include <sound/soc.h> |
||||
#include <sound/initval.h> |
||||
|
||||
#define WM8524_NUM_RATES 7 |
||||
|
||||
/* codec private data */ |
||||
struct wm8524_priv { |
||||
struct gpio_desc *mute; |
||||
unsigned int sysclk; |
||||
unsigned int rate_constraint_list[WM8524_NUM_RATES]; |
||||
struct snd_pcm_hw_constraint_list rate_constraint; |
||||
}; |
||||
|
||||
|
||||
static const struct snd_soc_dapm_widget wm8524_dapm_widgets[] = { |
||||
SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), |
||||
SND_SOC_DAPM_OUTPUT("LINEVOUTL"), |
||||
SND_SOC_DAPM_OUTPUT("LINEVOUTR"), |
||||
}; |
||||
|
||||
static const struct snd_soc_dapm_route wm8524_dapm_routes[] = { |
||||
{ "LINEVOUTL", NULL, "DAC" }, |
||||
{ "LINEVOUTR", NULL, "DAC" }, |
||||
}; |
||||
|
||||
static const struct { |
||||
int value; |
||||
int ratio; |
||||
} lrclk_ratios[WM8524_NUM_RATES] = { |
||||
{ 1, 128 }, |
||||
{ 2, 192 }, |
||||
{ 3, 256 }, |
||||
{ 4, 384 }, |
||||
{ 5, 512 }, |
||||
{ 6, 768 }, |
||||
{ 7, 1152 }, |
||||
}; |
||||
|
||||
static int wm8524_startup(struct snd_pcm_substream *substream, |
||||
struct snd_soc_dai *dai) |
||||
{ |
||||
struct snd_soc_codec *codec = dai->codec; |
||||
struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec); |
||||
|
||||
/* The set of sample rates that can be supported depends on the
|
||||
* MCLK supplied to the CODEC - enforce this. |
||||
*/ |
||||
if (!wm8524->sysclk) { |
||||
dev_err(codec->dev, |
||||
"No MCLK configured, call set_sysclk() on init\n"); |
||||
return -EINVAL; |
||||
} |
||||
|
||||
snd_pcm_hw_constraint_list(substream->runtime, 0, |
||||
SNDRV_PCM_HW_PARAM_RATE, |
||||
&wm8524->rate_constraint); |
||||
|
||||
gpiod_set_value_cansleep(wm8524->mute, 1); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static void wm8524_shutdown(struct snd_pcm_substream *substream, |
||||
struct snd_soc_dai *dai) |
||||
{ |
||||
struct snd_soc_codec *codec = dai->codec; |
||||
struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec); |
||||
|
||||
gpiod_set_value_cansleep(wm8524->mute, 0); |
||||
} |
||||
|
||||
static int wm8524_set_dai_sysclk(struct snd_soc_dai *codec_dai, |
||||
int clk_id, unsigned int freq, int dir) |
||||
{ |
||||
struct snd_soc_codec *codec = codec_dai->codec; |
||||
struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec); |
||||
unsigned int val; |
||||
int i, j = 0; |
||||
|
||||
wm8524->sysclk = freq; |
||||
|
||||
wm8524->rate_constraint.count = 0; |
||||
for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { |
||||
val = freq / lrclk_ratios[i].ratio; |
||||
/* Check that it's a standard rate since core can't
|
||||
* cope with others and having the odd rates confuses |
||||
* constraint matching. |
||||
*/ |
||||
switch (val) { |
||||
case 8000: |
||||
case 32000: |
||||
case 44100: |
||||
case 48000: |
||||
case 88200: |
||||
case 96000: |
||||
case 176400: |
||||
case 192000: |
||||
dev_dbg(codec->dev, "Supported sample rate: %dHz\n", |
||||
val); |
||||
wm8524->rate_constraint_list[j++] = val; |
||||
wm8524->rate_constraint.count++; |
||||
break; |
||||
default: |
||||
dev_dbg(codec->dev, "Skipping sample rate: %dHz\n", |
||||
val); |
||||
} |
||||
} |
||||
|
||||
/* Need at least one supported rate... */ |
||||
if (wm8524->rate_constraint.count == 0) |
||||
return -EINVAL; |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int wm8524_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) |
||||
{ |
||||
fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK | |
||||
SND_SOC_DAIFMT_MASTER_MASK); |
||||
|
||||
if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | |
||||
SND_SOC_DAIFMT_CBS_CFS)) { |
||||
dev_err(codec_dai->dev, "Invalid DAI format\n"); |
||||
return -EINVAL; |
||||
} |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static int wm8524_mute_stream(struct snd_soc_dai *dai, int mute, int stream) |
||||
{ |
||||
struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(dai->codec); |
||||
|
||||
if (wm8524->mute) |
||||
gpiod_set_value_cansleep(wm8524->mute, mute); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
#define WM8524_RATES SNDRV_PCM_RATE_8000_192000 |
||||
|
||||
#define WM8524_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE) |
||||
|
||||
static const struct snd_soc_dai_ops wm8524_dai_ops = { |
||||
.startup = wm8524_startup, |
||||
.shutdown = wm8524_shutdown, |
||||
.set_sysclk = wm8524_set_dai_sysclk, |
||||
.set_fmt = wm8524_set_fmt, |
||||
.mute_stream = wm8524_mute_stream, |
||||
}; |
||||
|
||||
static struct snd_soc_dai_driver wm8524_dai = { |
||||
.name = "wm8524-hifi", |
||||
.playback = { |
||||
.stream_name = "Playback", |
||||
.channels_min = 2, |
||||
.channels_max = 2, |
||||
.rates = WM8524_RATES, |
||||
.formats = WM8524_FORMATS, |
||||
}, |
||||
.ops = &wm8524_dai_ops, |
||||
}; |
||||
|
||||
static int wm8524_probe(struct snd_soc_codec *codec) |
||||
{ |
||||
struct wm8524_priv *wm8524 = snd_soc_codec_get_drvdata(codec); |
||||
|
||||
wm8524->rate_constraint.list = &wm8524->rate_constraint_list[0]; |
||||
wm8524->rate_constraint.count = |
||||
ARRAY_SIZE(wm8524->rate_constraint_list); |
||||
|
||||
return 0; |
||||
} |
||||
|
||||
static const struct snd_soc_codec_driver soc_codec_dev_wm8524 = { |
||||
.probe = wm8524_probe, |
||||
|
||||
.component_driver = { |
||||
.dapm_widgets = wm8524_dapm_widgets, |
||||
.num_dapm_widgets = ARRAY_SIZE(wm8524_dapm_widgets), |
||||
.dapm_routes = wm8524_dapm_routes, |
||||
.num_dapm_routes = ARRAY_SIZE(wm8524_dapm_routes), |
||||
}, |
||||
}; |
||||
|
||||
static const struct of_device_id wm8524_of_match[] = { |
||||
{ .compatible = "wlf,wm8524" }, |
||||
{ /* sentinel*/ } |
||||
}; |
||||
MODULE_DEVICE_TABLE(of, wm8524_of_match); |
||||
|
||||
static int wm8524_codec_probe(struct platform_device *pdev) |
||||
{ |
||||
struct wm8524_priv *wm8524; |
||||
int ret; |
||||
|
||||
wm8524 = devm_kzalloc(&pdev->dev, sizeof(struct wm8524_priv), |
||||
GFP_KERNEL); |
||||
if (wm8524 == NULL) |
||||
return -ENOMEM; |
||||
|
||||
platform_set_drvdata(pdev, wm8524); |
||||
|
||||
wm8524->mute = devm_gpiod_get(&pdev->dev, "wlf,mute", GPIOD_OUT_LOW); |
||||
if (IS_ERR(wm8524->mute)) { |
||||
ret = PTR_ERR(wm8524->mute); |
||||
dev_err(&pdev->dev, "Failed to get mute line: %d\n", ret); |
||||
return ret; |
||||
} |
||||
|
||||
ret = snd_soc_register_codec(&pdev->dev, |
||||
&soc_codec_dev_wm8524, &wm8524_dai, 1); |
||||
if (ret < 0) |
||||
dev_err(&pdev->dev, "Failed to register codec: %d\n", ret); |
||||
|
||||
return ret; |
||||
} |
||||
|
||||
static int wm8524_codec_remove(struct platform_device *pdev) |
||||
{ |
||||
snd_soc_unregister_codec(&pdev->dev); |
||||
return 0; |
||||
} |
||||
|
||||
static struct platform_driver wm8524_codec_driver = { |
||||
.probe = wm8524_codec_probe, |
||||
.remove = wm8524_codec_remove, |
||||
.driver = { |
||||
.name = "wm8524-codec", |
||||
.of_match_table = wm8524_of_match, |
||||
}, |
||||
}; |
||||
module_platform_driver(wm8524_codec_driver); |
||||
|
||||
MODULE_DESCRIPTION("ASoC WM8524 driver"); |
||||
MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>"); |
||||
MODULE_ALIAS("platform:wm8524-codec"); |
||||
MODULE_LICENSE("GPL"); |
||||
Loading…
Reference in new issue