blob: 210f6662eb098fb226bafad00bf8757f5fff798f [file] [log] [blame]
/*
* Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#include <linux/module.h>
#include <linux/of_platform.h>
#include <linux/i2c.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/clk.h>
#include <sound/soc.h>
#include <sound/jack.h>
#include <sound/control.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include <linux/pinctrl/consumer.h>
#include <linux/mfd/wm8994/registers.h>
#include <linux/mfd/syscon.h>
#include "../fsl/fsl_sai.h"
#include "../codecs/wm8994.h"
#define DAI_NAME_SIZE 32
struct imx_wm8958_data {
struct snd_soc_dai_link dai;
struct snd_soc_card card;
char codec_dai_name[DAI_NAME_SIZE];
char platform_name[DAI_NAME_SIZE];
struct clk *mclk;
unsigned int clk_frequency;
bool is_codec_master;
int sr_stream[2];
struct regmap *gpr;
};
struct imx_priv {
int hp_gpio;
int hp_active_low;
struct snd_soc_codec *codec;
struct platform_device *pdev;
};
static struct imx_priv card_priv;
static struct snd_soc_jack imx_hp_jack;
static struct snd_soc_jack_pin imx_hp_jack_pins[] = {
{
.pin = "Headphone Jack",
.mask = SND_JACK_HEADPHONE,
},
};
static struct snd_soc_jack_gpio imx_hp_jack_gpio = {
.name = "headphone detect",
.report = SND_JACK_HEADPHONE,
.debounce_time = 250,
.invert = 1,
};
static int hpjack_status_check(void *data)
{
struct imx_priv *priv = &card_priv;
struct platform_device *pdev = priv->pdev;
char *envp[3], *buf;
int hp_status, ret;
if (!gpio_is_valid(priv->hp_gpio))
return 0;
hp_status = gpio_get_value(priv->hp_gpio);
buf = kmalloc(32, GFP_ATOMIC);
if (!buf) {
dev_err(&pdev->dev, "%s kmalloc failed\n", __func__);
return -ENOMEM;
}
if (hp_status != priv->hp_active_low) {
snprintf(buf, 32, "STATE=%d", 2);
snd_soc_dapm_disable_pin(snd_soc_codec_get_dapm(priv->codec), "Ext Spk");
ret = imx_hp_jack_gpio.report;
} else {
snprintf(buf, 32, "STATE=%d", 0);
snd_soc_dapm_enable_pin(snd_soc_codec_get_dapm(priv->codec), "Ext Spk");
ret = 0;
}
envp[0] = "NAME=headphone";
envp[1] = buf;
envp[2] = NULL;
kobject_uevent_env(&pdev->dev.kobj, KOBJ_CHANGE, envp);
kfree(buf);
return ret;
}
static const struct snd_soc_dapm_widget imx_wm8958_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
};
static const struct snd_soc_dapm_route imx_wm8958_dapm_route[] = {
{"Headphone Jack", NULL, "HPOUT1L"},
{"Headphone Jack", NULL, "HPOUT1R"},
{"Ext Spk", NULL, "SPKOUTLP"},
{"Ext Spk", NULL, "SPKOUTLN"},
{"Ext Spk", NULL, "SPKOUTRP"},
{"Ext Spk", NULL, "SPKOUTRN"},
{"IN1LN", NULL, "MICBIAS2"},
};
static int imx_hifi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_codec *codec = codec_dai->codec;
struct snd_soc_card *card = rtd->card;
struct device *dev = card->dev;
struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int sample_rate = params_rate(params);
unsigned int pll_out;
int ret;
if (tx && params_width(params) == 24) {
if (sample_rate == 88200 || sample_rate == 96000 ||
sample_rate == 48000 || sample_rate == 44100) {
dev_err(dev, "Can't support sample rate %dHZ\n", sample_rate);
return -EINVAL;
}
} else if (!tx && params_width(params) == 24) {
if (sample_rate == 44100 || sample_rate == 48000) {
dev_err(dev, "Can't support sample rate %dHZ\n", sample_rate);
return -EINVAL;
}
}
ret = snd_soc_dai_set_fmt(codec_dai, data->dai.dai_fmt);
if (ret) {
dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_fmt(cpu_dai, data->dai.dai_fmt);
if (ret) {
dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
return ret;
}
data->clk_frequency = clk_get_rate(data->mclk);
if (!data->is_codec_master) {
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_OUT);
if (ret) {
dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_FLL_SRC_MCLK1,
data->clk_frequency, SND_SOC_CLOCK_IN);
if (ret) {
dev_err(dev, "failed to set codec sysclk: %d\n", ret);
return ret;
}
} else {
data->sr_stream[tx] = sample_rate;
if (params_width(params) == 24)
pll_out = data->sr_stream[tx] * 384;
else
pll_out = data->sr_stream[tx] * 256;
ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
WM8994_FLL_SRC_MCLK1,
data->clk_frequency,
pll_out);
if (ret) {
dev_err(dev, "failed to set codec pll: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(cpu_dai, 0, 0, SND_SOC_CLOCK_IN);
if (ret) {
dev_err(dev, "failed to set cpu sysclk: %d\n", ret);
return ret;
}
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
pll_out, SND_SOC_CLOCK_OUT);
if (ret) {
dev_err(dev, "failed to set codec sysclk: %d\n", ret);
return ret;
}
}
/*
* Set GPIO1 pin function to reserve, so that DAC1 and ADC1 using shared
* LRCLK from DACLRCK1.
*/
snd_soc_update_bits(codec, WM8994_GPIO_1, 0x1f, 0x2);
/*
* Clear ADC_OSR128 bit to support slower SYSCLK, and support ADC sample
* rate 8K, 11.025K and 12K.
*/
snd_soc_update_bits(codec, WM8994_OVERSAMPLING, 1<<1, 0);
return 0;
}
static int imx_hifi_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_card *card = rtd->card;
struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
if (data->is_codec_master &&
data->sr_stream[!tx] == 0 && data->sr_stream[tx]) {
/*
* We should connect AIF1CLK source to FLL after enable FLL, and
* disconnet AIF1CLK source to FLL before disable FLL, otherwise
* FLL worked abnormal.
*/
snd_soc_dai_set_sysclk(codec_dai, WM8994_FLL_SRC_MCLK1,
data->clk_frequency, SND_SOC_CLOCK_OUT);
/* Disable FLL1 after all stream finished. */
snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 0, 0, 0);
}
data->sr_stream[tx] = 0;
return 0;
}
static u32 imx_wm8958_adc_rates[] = {
8000, 11025, 12000, 16000, 22050,
24000, 32000, 44100, 48000
};
static u32 imx_wm8958_dac_rates[] = {
8000, 11025, 12000, 16000, 22050,
24000, 32000, 44100, 48000, 88200, 96000
};
static struct snd_pcm_hw_constraint_list imx_wm8958_adc_rate_constraints = {
.count = ARRAY_SIZE(imx_wm8958_adc_rates),
.list = imx_wm8958_adc_rates,
};
static struct snd_pcm_hw_constraint_list imx_wm8958_dac_rate_constraints = {
.count = ARRAY_SIZE(imx_wm8958_dac_rates),
.list = imx_wm8958_dac_rates,
};
static int imx_hifi_startup(struct snd_pcm_substream *substream)
{
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int ret = 0;
if (!tx)
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, &imx_wm8958_adc_rate_constraints);
else
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, &imx_wm8958_dac_rate_constraints);
return ret;
}
static struct snd_soc_ops imx_hifi_ops = {
.hw_params = imx_hifi_hw_params,
.hw_free = imx_hifi_hw_free,
.startup = imx_hifi_startup,
};
static int imx_wm8958_gpio_init(struct snd_soc_card *card)
{
struct snd_soc_pcm_runtime *rtd = list_first_entry(
&card->rtd_list, struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_codec *codec = codec_dai->codec;
struct imx_priv *priv = &card_priv;
int ret;
priv->codec = codec;
if (gpio_is_valid(priv->hp_gpio)) {
imx_hp_jack_gpio.gpio = priv->hp_gpio;
imx_hp_jack_gpio.jack_status_check = hpjack_status_check;
ret = snd_soc_card_jack_new(card, "Headphone Jack",
SND_JACK_HEADPHONE, &imx_hp_jack,
imx_hp_jack_pins, ARRAY_SIZE(imx_hp_jack_pins));
if (ret)
return ret;
ret = snd_soc_jack_add_gpios(&imx_hp_jack, 1,
&imx_hp_jack_gpio);
if (ret)
return ret;
}
return 0;
}
static ssize_t headphone_show(struct device_driver *dev, char *buf)
{
struct imx_priv *priv = &card_priv;
int hp_status;
if (!gpio_is_valid(priv->hp_gpio)) {
strcpy(buf, "no detect gpio connected\n");
return strlen(buf);
}
/* Check if headphone is plugged in */
hp_status = gpio_get_value(priv->hp_gpio);
if (hp_status != priv->hp_active_low)
strcpy(buf, "headphone\n");
else
strcpy(buf, "speaker\n");
return strlen(buf);
}
static DRIVER_ATTR_RO(headphone);
static int imx_wm8958_set_bias_level(struct snd_soc_card *card,
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
struct snd_soc_pcm_runtime *rtd = list_first_entry(
&card->rtd_list, struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
int ret;
if (dapm->dev != codec_dai->dev)
return 0;
switch (level) {
case SND_SOC_BIAS_STANDBY:
if (card->dapm.bias_level == SND_SOC_BIAS_OFF) {
if (!IS_ERR(data->mclk)) {
ret = clk_prepare_enable(data->mclk);
if (ret) {
dev_err(card->dev,
"Failed to enable MCLK: %d\n",
ret);
return ret;
}
}
}
break;
default:
break;
}
return 0;
}
static int imx_wm8958_set_bias_level_post(struct snd_soc_card *card,
struct snd_soc_dapm_context *dapm,
enum snd_soc_bias_level level)
{
struct snd_soc_pcm_runtime *rtd = list_first_entry(
&card->rtd_list, struct snd_soc_pcm_runtime, list);
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct imx_wm8958_data *data = snd_soc_card_get_drvdata(card);
if (dapm->dev != codec_dai->dev)
return 0;
switch (level) {
case SND_SOC_BIAS_OFF:
if (card->dapm.bias_level == SND_SOC_BIAS_STANDBY)
if (!IS_ERR(data->mclk))
clk_disable_unprepare(data->mclk);
break;
default:
break;
}
card->dapm.bias_level = level;
return 0;
}
static int of_parse_gpr(struct platform_device *pdev,
struct imx_wm8958_data *data)
{
int ret;
struct of_phandle_args args;
if (of_device_is_compatible(pdev->dev.of_node,
"fsl,imx7d-12x12-lpddr3-arm2-wm8958"))
return 0;
ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
"gpr", 3, 0, &args);
if (ret) {
dev_warn(&pdev->dev, "failed to get gpr property\n");
return ret;
}
data->gpr = syscon_node_to_regmap(args.np);
if (IS_ERR(data->gpr)) {
ret = PTR_ERR(data->gpr);
dev_err(&pdev->dev, "failed to get gpr regmap\n");
return ret;
}
regmap_update_bits(data->gpr, args.args[0], args.args[1],
args.args[2]);
return 0;
}
static int imx_wm8958_probe(struct platform_device *pdev)
{
struct device_node *cpu_np, *codec_np = NULL;
struct device_node *np = pdev->dev.of_node;
struct platform_device *cpu_pdev;
struct imx_priv *priv = &card_priv;
struct i2c_client *codec_dev;
struct imx_wm8958_data *data;
int ret;
priv->pdev = pdev;
cpu_np = of_parse_phandle(np, "cpu-dai", 0);
if (!cpu_np) {
dev_err(&pdev->dev, "cpu dai phandle missing or invalid\n");
ret = -EINVAL;
goto fail;
}
codec_np = of_parse_phandle(np, "audio-codec", 0);
if (!codec_np) {
dev_err(&pdev->dev, "phandle missing or invalid\n");
ret = -EINVAL;
goto fail;
}
cpu_pdev = of_find_device_by_node(cpu_np);
if (!cpu_pdev) {
dev_err(&pdev->dev, "failed to find SAI platform device\n");
ret = -EINVAL;
goto fail;
}
codec_dev = of_find_i2c_device_by_node(codec_np);
if (!codec_dev || !codec_dev->dev.driver) {
dev_err(&pdev->dev, "failed to find codec platform device\n");
ret = -EINVAL;
goto fail;
}
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
if (!data) {
ret = -ENOMEM;
goto fail;
}
ret = of_parse_gpr(pdev, data);
if (ret)
goto fail;
if (of_property_read_bool(np, "codec-master")) {
data->dai.dai_fmt = SND_SOC_DAIFMT_CBM_CFM;
data->is_codec_master = true;
} else
data->dai.dai_fmt = SND_SOC_DAIFMT_CBS_CFS;
data->mclk = devm_clk_get(&codec_dev->dev, "mclk1");
if (IS_ERR(data->mclk)) {
ret = PTR_ERR(data->mclk);
dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
goto fail;
}
priv->hp_gpio = of_get_named_gpio_flags(np, "hp-det-gpios", 0,
(enum of_gpio_flags *)&priv->hp_active_low);
data->dai.name = "HiFi";
data->dai.stream_name = "HiFi";
data->dai.codec_dai_name = "wm8994-aif1";
data->dai.codec_name = "wm8994-codec";
data->dai.cpu_dai_name = dev_name(&cpu_pdev->dev);
data->dai.platform_of_node = cpu_np;
data->dai.ops = &imx_hifi_ops;
data->dai.dai_fmt |= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
data->card.set_bias_level = imx_wm8958_set_bias_level;
data->card.set_bias_level_post = imx_wm8958_set_bias_level_post;
data->card.owner = THIS_MODULE;
data->card.dev = &pdev->dev;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
data->card.num_links = 1;
data->card.dai_link = &data->dai;
data->card.dapm_widgets = imx_wm8958_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8958_dapm_widgets);
data->card.dapm_routes = imx_wm8958_dapm_route;
data->card.num_dapm_routes = ARRAY_SIZE(imx_wm8958_dapm_route);
platform_set_drvdata(pdev, &data->card);
snd_soc_card_set_drvdata(&data->card, data);
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
goto fail;
}
ret = imx_wm8958_gpio_init(&data->card);
if (gpio_is_valid(priv->hp_gpio)) {
ret = driver_create_file(pdev->dev.driver,
&driver_attr_headphone);
if (ret) {
dev_err(&pdev->dev,
"create hp attr failed (%d)\n", ret);
goto fail;
}
}
fail:
if (cpu_np)
of_node_put(cpu_np);
if (codec_np)
of_node_put(codec_np);
return ret;
}
static int imx_wm8958_remove(struct platform_device *pdev)
{
driver_remove_file(pdev->dev.driver, &driver_attr_headphone);
return 0;
}
static const struct of_device_id imx_wm8958_dt_ids[] = {
{ .compatible = "fsl,imx-audio-wm8958", },
{ .compatible = "fsl,imx7d-12x12-lpddr3-arm2-wm8958", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_wm8958_dt_ids);
static struct platform_driver imx_wm8958_driver = {
.driver = {
.name = "imx-wm8958",
.pm = &snd_soc_pm_ops,
.of_match_table = imx_wm8958_dt_ids,
},
.probe = imx_wm8958_probe,
.remove = imx_wm8958_remove,
};
module_platform_driver(imx_wm8958_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Freescale i.MX WM8958 ASoC machine driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:imx-wm8958");