blob: 0406d6716b6a9ed06a72d6257cecc107ce22af04 [file] [log] [blame]
/*
* Copyright (C) 2015 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/syscon.h>
#include "../codecs/wm8960.h"
#include "fsl_sai.h"
#define DAI_NAME_SIZE 32
struct imx_wm8960_data {
struct snd_soc_card card;
char codec_dai_name[DAI_NAME_SIZE];
char platform_name[DAI_NAME_SIZE];
struct clk *codec_clk;
unsigned int clk_frequency;
bool is_codec_master;
bool is_stream_in_use[2];
bool is_stream_opened[2];
struct regmap *gpr;
unsigned int hp_det[2];
u32 asrc_rate;
u32 asrc_format;
};
struct imx_priv {
int hp_set_gpio;
int hp_active_low;
struct snd_kcontrol *headset_kctl;
struct snd_soc_codec *codec;
struct platform_device *pdev;
struct platform_device *asrc_pdev;
struct snd_card *snd_card;
};
static struct imx_priv card_priv;
static struct snd_soc_jack imx_hp_set;
static struct snd_soc_jack_pin imx_hp_set_pins[] = {
{
.pin = "Headset Jack",
.mask = SND_JACK_HEADSET,
},
};
static struct snd_soc_jack_gpio imx_hp_set_gpio = {
.name = "headset detect",
.report = SND_JACK_HEADSET,
.debounce_time = 250,
.invert = 1,
};
static int hp_set_status_check(void)
{
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_set_gpio))
return 0;
hp_status = gpio_get_value(priv->hp_set_gpio) ? 1 : 0;
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(&priv->codec->dapm, "Ext Spk");
snd_soc_dapm_disable_pin(&priv->codec->dapm, "Main MIC");
ret = imx_hp_set_gpio.report;
/*
* As the hp MIC only connect the input for left channel, we
* need to route it for right channel.
*/
snd_soc_update_bits(priv->codec, WM8960_ADDCTL1, 3<<2, 1<<2);
snd_kctl_jack_report(priv->snd_card, priv->headset_kctl, 1);
} else {
snprintf(buf, 32, "STATE=%d", 0);
snd_soc_dapm_enable_pin(&priv->codec->dapm, "Ext Spk");
snd_soc_dapm_enable_pin(&priv->codec->dapm, "Main MIC");
ret = 0;
/*
* As the Main MIC only connect the input for right channel,
* we need to route it for left channel.
*/
snd_soc_update_bits(priv->codec, WM8960_ADDCTL1, 3<<2, 2<<2);
snd_kctl_jack_report(priv->snd_card, priv->headset_kctl, 0);
}
envp[0] = "NAME=headset";
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_wm8960_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headset Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", NULL),
SND_SOC_DAPM_MIC("Hp MIC", NULL),
SND_SOC_DAPM_MIC("Main MIC", NULL),
};
static int imx_wm8960_gpio_init(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = card->rtd[0].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_set_gpio)) {
imx_hp_set_gpio.gpio = priv->hp_set_gpio;
imx_hp_set_gpio.jack_status_check = hp_set_status_check;
ret = snd_soc_jack_new(codec, "Headset Jack",
SND_JACK_HEADSET, &imx_hp_set);
if (ret)
return ret;
ret = snd_soc_jack_add_pins(&imx_hp_set,
ARRAY_SIZE(imx_hp_set_pins), imx_hp_set_pins);
if (ret)
return ret;
ret = snd_soc_jack_add_gpios(&imx_hp_set, 1,
&imx_hp_set_gpio);
if (ret)
return ret;
}
return 0;
}
static ssize_t show_headphone(struct device_driver *dev, char *buf)
{
struct imx_priv *priv = &card_priv;
int hp_status;
if (!gpio_is_valid(priv->hp_set_gpio)) {
strcpy(buf, "no detect gpio connected\n");
return strlen(buf);
}
/* Check if headphone is plugged in */
hp_status = gpio_get_value(priv->hp_set_gpio) ? 1 : 0;
if (hp_status != priv->hp_active_low)
strcpy(buf, "Headphone\n");
else
strcpy(buf, "Speaker\n");
return strlen(buf);
}
static ssize_t show_micphone(struct device_driver *dev, char *buf)
{
struct imx_priv *priv = &card_priv;
int hp_status;
if (!gpio_is_valid(priv->hp_set_gpio)) {
strcpy(buf, "no detect gpio connected\n");
return strlen(buf);
}
/* Check if headphone is plugged in */
hp_status = gpio_get_value(priv->hp_set_gpio) ? 1 : 0;
if (hp_status != priv->hp_active_low)
strcpy(buf, "Hp MIC\n");
else
strcpy(buf, "Main MIC\n");
return strlen(buf);
}
static DRIVER_ATTR(headphone, S_IRUGO | S_IWUSR, show_headphone, NULL);
static DRIVER_ATTR(micphone, S_IRUGO | S_IWUSR, show_micphone, NULL);
static void wm8960_init(struct snd_soc_dai *codec_dai)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct snd_soc_card *card = codec_dai->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
/*
* codec ADCLRC pin configured as GPIO, DACLRC pin is used as a frame
* clock for ADCs and DACs
*/
snd_soc_update_bits(codec, WM8960_IFACE2, 1<<6, 1<<6);
/*
* GPIO1 used as headphone detect output
*/
snd_soc_update_bits(codec, WM8960_ADDCTL4, 7<<4, 3<<4);
/*
* Enable headphone jack detect
*/
snd_soc_update_bits(codec, WM8960_ADDCTL2, 1<<6, 1<<6);
snd_soc_update_bits(codec, WM8960_ADDCTL2, 1<<5, data->hp_det[1]<<5);
snd_soc_update_bits(codec, WM8960_ADDCTL4, 3<<2, data->hp_det[0]<<2);
snd_soc_update_bits(codec, WM8960_ADDCTL1, 3, 3);
/*
* route left channel to right channel in default.
*/
snd_soc_update_bits(codec, WM8960_ADDCTL1, 3<<2, 1<<2);
}
/* -1 for reserved value */
static const int sysclk_divs[] = { 1, -1, 2, -1 };
/* Multiply 256 for internal 256 div */
static const int dac_divs[] = { 256, 384, 512, 768, 1024, 1408, 1536 };
/* Multiply 10 to eliminate decimials */
static const int bclk_divs[] = {
10, 15, 20, 30, 40, 55, 60, 80, 110,
120, 160, 220, 240, 320, 320, 320
};
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_card *card = codec_dai->codec->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
struct device *dev = card->dev;
unsigned int sample_rate = params_rate(params);
unsigned int sysclk, pll_out;
int i, j, k, ret = 0;
int bclk = snd_soc_params_to_bclk(params);
unsigned int fmt;
if (params_channels(params) == 1)
bclk *= 2;
data->is_stream_in_use[tx] = true;
if (data->is_stream_in_use[!tx])
return 0;
if (data->is_codec_master)
fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM;
else
fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
/* set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret) {
dev_err(dev, "failed to set cpu dai fmt: %d\n", ret);
return ret;
}
/* set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, fmt);
if (ret) {
dev_err(dev, "failed to set codec dai fmt: %d\n", ret);
return ret;
}
if (!data->is_codec_master) {
ret = snd_soc_dai_set_tdm_slot(cpu_dai, 0, 0, 2, params_width(params));
if (ret) {
dev_err(dev, "failed to set cpu dai tdm slot: %d\n", ret);
return ret;
}
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;
}
return 0;
} else {
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;
}
}
data->clk_frequency = clk_get_rate(data->codec_clk);
/* Use MCLK to provide sysclk directly*/
sysclk = data->clk_frequency;
for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) {
if (sysclk_divs[i] == -1)
continue;
sysclk /= sysclk_divs[i];
for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) {
if (sysclk == sample_rate * dac_divs[j]) {
for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k)
if (sysclk == bclk * bclk_divs[k] / 10) {
snd_soc_dai_set_sysclk(codec_dai, WM8960_SYSCLK_MCLK, sysclk, 0);
snd_soc_dai_set_clkdiv(codec_dai, WM8960_SYSCLKDIV, i << 1);
return 0;
}
}
}
}
/* Use PLL to provide sysclk */
for (i = 0; i < ARRAY_SIZE(sysclk_divs); ++i) {
if (sysclk_divs[i] == -1)
continue;
for (j = 0; j < ARRAY_SIZE(dac_divs); ++j) {
sysclk = sample_rate * dac_divs[j];
pll_out = sysclk * sysclk_divs[i];
for (k = 0; k < ARRAY_SIZE(bclk_divs); ++k) {
if (sysclk == bclk * bclk_divs[k] / 10) {
/* Set codec pll */
ret = snd_soc_dai_set_pll(codec_dai, 0, 0, data->clk_frequency, pll_out);
if (ret != 0)
continue;
/* Set codec sysclk */
snd_soc_dai_set_sysclk(codec_dai, WM8960_SYSCLK_PLL, sysclk, 0);
snd_soc_dai_set_clkdiv(codec_dai, WM8960_SYSCLKDIV, i << 1);
return 0;
}
}
}
}
dev_err(dev, "failed to configure system clock");
return -EINVAL;
}
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 = codec_dai->codec->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
data->is_stream_in_use[tx] = false;
/* Power down PLL to save power*/
if (data->is_codec_master && !data->is_stream_in_use[!tx]) {
snd_soc_dai_set_pll(codec_dai, 0, 0, 0, 0);
snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_CBS_CFS | SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF);
}
return 0;
}
static u32 imx_wm8960_rates[] = { 8000, 16000, 32000, 48000 };
static struct snd_pcm_hw_constraint_list imx_wm8960_rate_constraints = {
.count = ARRAY_SIZE(imx_wm8960_rates),
.list = imx_wm8960_rates,
};
static int imx_hifi_startup(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_dai *cpu_dai = rtd->cpu_dai;
struct snd_soc_card *card = codec_dai->codec->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
int ret = 0;
data->is_stream_opened[tx] = true;
if (data->is_stream_opened[tx] != sai->is_stream_opened[tx] ||
data->is_stream_opened[!tx] != sai->is_stream_opened[!tx]) {
data->is_stream_opened[tx] = false;
return -EBUSY;
}
if (!data->is_codec_master) {
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_RATE, &imx_wm8960_rate_constraints);
if (ret)
return ret;
}
ret = clk_prepare_enable(data->codec_clk);
if (ret) {
dev_err(card->dev, "Failed to enable MCLK: %d\n", ret);
return ret;
}
return ret;
}
static void imx_hifi_shutdown(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 = codec_dai->codec->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
clk_disable_unprepare(data->codec_clk);
data->is_stream_opened[tx] = false;
}
static struct snd_soc_ops imx_hifi_ops = {
.hw_params = imx_hifi_hw_params,
.hw_free = imx_hifi_hw_free,
.startup = imx_hifi_startup,
.shutdown = imx_hifi_shutdown,
};
static int imx_wm8960_late_probe(struct snd_soc_card *card)
{
struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
/*
* set SAI2_MCLK_DIR to enable codec MCLK
*/
if (data->gpr)
regmap_update_bits(data->gpr, 4, 1<<20, 1<<20);
wm8960_init(codec_dai);
return 0;
}
static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
struct snd_pcm_hw_params *params)
{
struct snd_soc_card *card = rtd->card;
struct imx_wm8960_data *data = snd_soc_card_get_drvdata(card);
struct imx_priv *priv = &card_priv;
struct snd_interval *rate;
struct snd_mask *mask;
if (!priv->asrc_pdev)
return -EINVAL;
rate = hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
rate->max = rate->min = data->asrc_rate;
mask = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
snd_mask_none(mask);
snd_mask_set(mask, data->asrc_format);
return 0;
}
static struct snd_soc_dai_link imx_wm8960_dai[] = {
{
.name = "HiFi",
.stream_name = "HiFi",
.codec_dai_name = "wm8960-hifi",
.ops = &imx_hifi_ops,
},
{
.name = "HiFi-ASRC-FE",
.stream_name = "HiFi-ASRC-FE",
.codec_name = "snd-soc-dummy",
.codec_dai_name = "snd-soc-dummy-dai",
.dynamic = 1,
.ignore_pmdown_time = 1,
.dpcm_playback = 1,
.dpcm_capture = 1,
},
{
.name = "HiFi-ASRC-BE",
.stream_name = "HiFi-ASRC-BE",
.codec_dai_name = "wm8960-hifi",
.platform_name = "snd-soc-dummy",
.no_pcm = 1,
.ignore_pmdown_time = 1,
.dpcm_playback = 1,
.dpcm_capture = 1,
.ops = &imx_hifi_ops,
.be_hw_params_fixup = be_hw_params_fixup,
},
};
static int imx_wm8960_probe(struct platform_device *pdev)
{
struct device_node *cpu_np, *codec_np, *gpr_np;
struct platform_device *cpu_pdev;
struct imx_priv *priv = &card_priv;
struct i2c_client *codec_dev;
struct imx_wm8960_data *data;
struct platform_device *asrc_pdev = NULL;
struct device_node *asrc_np;
u32 width;
int ret;
priv->pdev = pdev;
cpu_np = of_parse_phandle(pdev->dev.of_node, "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(pdev->dev.of_node, "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;
}
if (of_property_read_bool(pdev->dev.of_node, "codec-master"))
data->is_codec_master = true;
data->codec_clk = devm_clk_get(&codec_dev->dev, "mclk");
if (IS_ERR(data->codec_clk)) {
ret = PTR_ERR(data->codec_clk);
dev_err(&pdev->dev, "failed to get codec clk: %d\n", ret);
goto fail;
}
gpr_np = of_parse_phandle(pdev->dev.of_node, "gpr", 0);
if (gpr_np) {
data->gpr = syscon_node_to_regmap(gpr_np);
if (IS_ERR(data->gpr)) {
ret = PTR_ERR(data->gpr);
dev_err(&pdev->dev, "failed to get gpr regmap\n");
goto fail;
}
}
of_property_read_u32_array(pdev->dev.of_node, "hp-det", data->hp_det, 2);
asrc_np = of_parse_phandle(pdev->dev.of_node, "asrc-controller", 0);
if (asrc_np) {
asrc_pdev = of_find_device_by_node(asrc_np);
priv->asrc_pdev = asrc_pdev;
}
data->card.dai_link = imx_wm8960_dai;
imx_wm8960_dai[0].codec_of_node = codec_np;
imx_wm8960_dai[0].cpu_dai_name = dev_name(&cpu_pdev->dev);
imx_wm8960_dai[0].platform_of_node = cpu_np;
if (!asrc_pdev) {
data->card.num_links = 1;
} else {
imx_wm8960_dai[1].cpu_of_node = asrc_np;
imx_wm8960_dai[1].platform_of_node = asrc_np;
imx_wm8960_dai[2].codec_of_node = codec_np;
imx_wm8960_dai[2].cpu_dai_name = dev_name(&cpu_pdev->dev);
data->card.num_links = 3;
ret = of_property_read_u32(asrc_np, "fsl,asrc-rate",
&data->asrc_rate);
if (ret) {
dev_err(&pdev->dev, "failed to get output rate\n");
ret = -EINVAL;
goto fail;
}
ret = of_property_read_u32(asrc_np, "fsl,asrc-width", &width);
if (ret) {
dev_err(&pdev->dev, "failed to get output rate\n");
ret = -EINVAL;
goto fail;
}
if (width == 24)
data->asrc_format = SNDRV_PCM_FORMAT_S24_LE;
else
data->asrc_format = SNDRV_PCM_FORMAT_S16_LE;
}
data->card.dev = &pdev->dev;
ret = snd_soc_of_parse_card_name(&data->card, "model");
if (ret)
goto fail;
data->card.dapm_widgets = imx_wm8960_dapm_widgets;
data->card.num_dapm_widgets = ARRAY_SIZE(imx_wm8960_dapm_widgets);
ret = snd_soc_of_parse_audio_routing(&data->card, "audio-routing");
if (ret)
goto fail;
data->card.late_probe = imx_wm8960_late_probe;
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;
}
priv->snd_card = data->card.snd_card;
priv->hp_set_gpio = of_get_named_gpio_flags(pdev->dev.of_node, "hp-det-gpios", 0,
(enum of_gpio_flags *)&priv->hp_active_low);
if (IS_ERR(ERR_PTR(priv->hp_set_gpio)))
goto fail;
priv->headset_kctl = snd_kctl_jack_new("Headset", 0, NULL);
ret = snd_ctl_add(data->card.snd_card, priv->headset_kctl);
if (ret)
goto fail;
ret = imx_wm8960_gpio_init(&data->card);
if (gpio_is_valid(priv->hp_set_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;
}
ret = driver_create_file(pdev->dev.driver, &driver_attr_micphone);
if (ret) {
dev_err(&pdev->dev, "create mic 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 const struct of_device_id imx_wm8960_dt_ids[] = {
{ .compatible = "fsl,imx-audio-wm8960", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_wm8960_dt_ids);
static struct platform_driver imx_wm8960_driver = {
.driver = {
.name = "imx-wm8960",
.owner = THIS_MODULE,
.pm = &snd_soc_pm_ops,
.of_match_table = imx_wm8960_dt_ids,
},
.probe = imx_wm8960_probe,
};
module_platform_driver(imx_wm8960_driver);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("Freescale i.MX WM8960 ASoC machine driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:imx-wm8960");