368 lines
8.5 KiB
C
368 lines
8.5 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
//
|
||
|
|
// Copyright 2009 Simtec Electronics
|
||
|
|
|
||
|
|
#include <linux/gpio.h>
|
||
|
|
#include <linux/clk.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
|
||
|
|
#include <sound/soc.h>
|
||
|
|
|
||
|
|
#include <linux/platform_data/asoc-s3c24xx_simtec.h>
|
||
|
|
|
||
|
|
#include "s3c24xx-i2s.h"
|
||
|
|
#include "s3c24xx_simtec.h"
|
||
|
|
|
||
|
|
static struct s3c24xx_audio_simtec_pdata *pdata;
|
||
|
|
static struct clk *xtal_clk;
|
||
|
|
|
||
|
|
static int spk_gain;
|
||
|
|
static int spk_unmute;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* speaker_gain_get - read the speaker gain setting.
|
||
|
|
* @kcontrol: The control for the speaker gain.
|
||
|
|
* @ucontrol: The value that needs to be updated.
|
||
|
|
*
|
||
|
|
* Read the value for the AMP gain control.
|
||
|
|
*/
|
||
|
|
static int speaker_gain_get(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
ucontrol->value.integer.value[0] = spk_gain;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* speaker_gain_set - set the value of the speaker amp gain
|
||
|
|
* @value: The value to write.
|
||
|
|
*/
|
||
|
|
static void speaker_gain_set(int value)
|
||
|
|
{
|
||
|
|
gpio_set_value_cansleep(pdata->amp_gain[0], value & 1);
|
||
|
|
gpio_set_value_cansleep(pdata->amp_gain[1], value >> 1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* speaker_gain_put - set the speaker gain setting.
|
||
|
|
* @kcontrol: The control for the speaker gain.
|
||
|
|
* @ucontrol: The value that needs to be set.
|
||
|
|
*
|
||
|
|
* Set the value of the speaker gain from the specified
|
||
|
|
* @ucontrol setting.
|
||
|
|
*
|
||
|
|
* Note, if the speaker amp is muted, then we do not set a gain value
|
||
|
|
* as at-least one of the ICs that is fitted will try and power up even
|
||
|
|
* if the main control is set to off.
|
||
|
|
*/
|
||
|
|
static int speaker_gain_put(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
int value = ucontrol->value.integer.value[0];
|
||
|
|
|
||
|
|
spk_gain = value;
|
||
|
|
|
||
|
|
if (!spk_unmute)
|
||
|
|
speaker_gain_set(value);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct snd_kcontrol_new amp_gain_controls[] = {
|
||
|
|
SOC_SINGLE_EXT("Speaker Gain", 0, 0, 3, 0,
|
||
|
|
speaker_gain_get, speaker_gain_put),
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* spk_unmute_state - set the unmute state of the speaker
|
||
|
|
* @to: zero to unmute, non-zero to ununmute.
|
||
|
|
*/
|
||
|
|
static void spk_unmute_state(int to)
|
||
|
|
{
|
||
|
|
pr_debug("%s: to=%d\n", __func__, to);
|
||
|
|
|
||
|
|
spk_unmute = to;
|
||
|
|
gpio_set_value(pdata->amp_gpio, to);
|
||
|
|
|
||
|
|
/* if we're umuting, also re-set the gain */
|
||
|
|
if (to && pdata->amp_gain[0] > 0)
|
||
|
|
speaker_gain_set(spk_gain);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* speaker_unmute_get - read the speaker unmute setting.
|
||
|
|
* @kcontrol: The control for the speaker gain.
|
||
|
|
* @ucontrol: The value that needs to be updated.
|
||
|
|
*
|
||
|
|
* Read the value for the AMP gain control.
|
||
|
|
*/
|
||
|
|
static int speaker_unmute_get(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
ucontrol->value.integer.value[0] = spk_unmute;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* speaker_unmute_put - set the speaker unmute setting.
|
||
|
|
* @kcontrol: The control for the speaker gain.
|
||
|
|
* @ucontrol: The value that needs to be set.
|
||
|
|
*
|
||
|
|
* Set the value of the speaker gain from the specified
|
||
|
|
* @ucontrol setting.
|
||
|
|
*/
|
||
|
|
static int speaker_unmute_put(struct snd_kcontrol *kcontrol,
|
||
|
|
struct snd_ctl_elem_value *ucontrol)
|
||
|
|
{
|
||
|
|
spk_unmute_state(ucontrol->value.integer.value[0]);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* This is added as a manual control as the speaker amps create clicks
|
||
|
|
* when their power state is changed, which are far more noticeable than
|
||
|
|
* anything produced by the CODEC itself.
|
||
|
|
*/
|
||
|
|
static const struct snd_kcontrol_new amp_unmute_controls[] = {
|
||
|
|
SOC_SINGLE_EXT("Speaker Switch", 0, 0, 1, 0,
|
||
|
|
speaker_unmute_get, speaker_unmute_put),
|
||
|
|
};
|
||
|
|
|
||
|
|
void simtec_audio_init(struct snd_soc_pcm_runtime *rtd)
|
||
|
|
{
|
||
|
|
struct snd_soc_card *card = rtd->card;
|
||
|
|
|
||
|
|
if (pdata->amp_gpio > 0) {
|
||
|
|
pr_debug("%s: adding amp routes\n", __func__);
|
||
|
|
|
||
|
|
snd_soc_add_card_controls(card, amp_unmute_controls,
|
||
|
|
ARRAY_SIZE(amp_unmute_controls));
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pdata->amp_gain[0] > 0) {
|
||
|
|
pr_debug("%s: adding amp controls\n", __func__);
|
||
|
|
snd_soc_add_card_controls(card, amp_gain_controls,
|
||
|
|
ARRAY_SIZE(amp_gain_controls));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(simtec_audio_init);
|
||
|
|
|
||
|
|
#define CODEC_CLOCK 12000000
|
||
|
|
|
||
|
|
/**
|
||
|
|
* simtec_hw_params - update hardware parameters
|
||
|
|
* @substream: The audio substream instance.
|
||
|
|
* @params: The parameters requested.
|
||
|
|
*
|
||
|
|
* Update the codec data routing and configuration settings
|
||
|
|
* from the supplied data.
|
||
|
|
*/
|
||
|
|
static int simtec_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;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = snd_soc_dai_set_sysclk(codec_dai, 0,
|
||
|
|
CODEC_CLOCK, SND_SOC_CLOCK_IN);
|
||
|
|
if (ret) {
|
||
|
|
pr_err( "%s: failed setting codec sysclk\n", __func__);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pdata->use_mpllin) {
|
||
|
|
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C24XX_CLKSRC_MPLL,
|
||
|
|
0, SND_SOC_CLOCK_OUT);
|
||
|
|
|
||
|
|
if (ret) {
|
||
|
|
pr_err("%s: failed to set MPLLin as clksrc\n",
|
||
|
|
__func__);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pdata->output_cdclk) {
|
||
|
|
int cdclk_scale;
|
||
|
|
|
||
|
|
cdclk_scale = clk_get_rate(xtal_clk) / CODEC_CLOCK;
|
||
|
|
cdclk_scale--;
|
||
|
|
|
||
|
|
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
|
||
|
|
cdclk_scale);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int simtec_call_startup(struct s3c24xx_audio_simtec_pdata *pd)
|
||
|
|
{
|
||
|
|
/* call any board supplied startup code, this currently only
|
||
|
|
* covers the bast/vr1000 which have a CPLD in the way of the
|
||
|
|
* LRCLK */
|
||
|
|
if (pd->startup)
|
||
|
|
pd->startup();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct snd_soc_ops simtec_snd_ops = {
|
||
|
|
.hw_params = simtec_hw_params,
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* attach_gpio_amp - get and configure the necessary gpios
|
||
|
|
* @dev: The device we're probing.
|
||
|
|
* @pd: The platform data supplied by the board.
|
||
|
|
*
|
||
|
|
* If there is a GPIO based amplifier attached to the board, claim
|
||
|
|
* the necessary GPIO lines for it, and set default values.
|
||
|
|
*/
|
||
|
|
static int attach_gpio_amp(struct device *dev,
|
||
|
|
struct s3c24xx_audio_simtec_pdata *pd)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* attach gpio amp gain (if any) */
|
||
|
|
if (pdata->amp_gain[0] > 0) {
|
||
|
|
ret = gpio_request(pd->amp_gain[0], "gpio-amp-gain0");
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "cannot get amp gpio gain0\n");
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret = gpio_request(pd->amp_gain[1], "gpio-amp-gain1");
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "cannot get amp gpio gain1\n");
|
||
|
|
gpio_free(pdata->amp_gain[0]);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
gpio_direction_output(pd->amp_gain[0], 0);
|
||
|
|
gpio_direction_output(pd->amp_gain[1], 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* note, currently we assume GPA0 isn't valid amp */
|
||
|
|
if (pdata->amp_gpio > 0) {
|
||
|
|
ret = gpio_request(pd->amp_gpio, "gpio-amp");
|
||
|
|
if (ret) {
|
||
|
|
dev_err(dev, "cannot get amp gpio %d (%d)\n",
|
||
|
|
pd->amp_gpio, ret);
|
||
|
|
goto err_amp;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* set the amp off at startup */
|
||
|
|
spk_unmute_state(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_amp:
|
||
|
|
if (pd->amp_gain[0] > 0) {
|
||
|
|
gpio_free(pd->amp_gain[0]);
|
||
|
|
gpio_free(pd->amp_gain[1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void detach_gpio_amp(struct s3c24xx_audio_simtec_pdata *pd)
|
||
|
|
{
|
||
|
|
if (pd->amp_gain[0] > 0) {
|
||
|
|
gpio_free(pd->amp_gain[0]);
|
||
|
|
gpio_free(pd->amp_gain[1]);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (pd->amp_gpio > 0)
|
||
|
|
gpio_free(pd->amp_gpio);
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
static int simtec_audio_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
simtec_call_startup(pdata);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
const struct dev_pm_ops simtec_audio_pmops = {
|
||
|
|
.resume = simtec_audio_resume,
|
||
|
|
};
|
||
|
|
EXPORT_SYMBOL_GPL(simtec_audio_pmops);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
int simtec_audio_core_probe(struct platform_device *pdev,
|
||
|
|
struct snd_soc_card *card)
|
||
|
|
{
|
||
|
|
struct platform_device *snd_dev;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
card->dai_link->ops = &simtec_snd_ops;
|
||
|
|
card->dai_link->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
|
||
|
|
SND_SOC_DAIFMT_CBM_CFM;
|
||
|
|
|
||
|
|
pdata = pdev->dev.platform_data;
|
||
|
|
if (!pdata) {
|
||
|
|
dev_err(&pdev->dev, "no platform data supplied\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
simtec_call_startup(pdata);
|
||
|
|
|
||
|
|
xtal_clk = clk_get(&pdev->dev, "xtal");
|
||
|
|
if (IS_ERR(xtal_clk)) {
|
||
|
|
dev_err(&pdev->dev, "could not get clkout0\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
dev_info(&pdev->dev, "xtal rate is %ld\n", clk_get_rate(xtal_clk));
|
||
|
|
|
||
|
|
ret = attach_gpio_amp(&pdev->dev, pdata);
|
||
|
|
if (ret)
|
||
|
|
goto err_clk;
|
||
|
|
|
||
|
|
snd_dev = platform_device_alloc("soc-audio", -1);
|
||
|
|
if (!snd_dev) {
|
||
|
|
dev_err(&pdev->dev, "failed to alloc soc-audio devicec\n");
|
||
|
|
ret = -ENOMEM;
|
||
|
|
goto err_gpio;
|
||
|
|
}
|
||
|
|
|
||
|
|
platform_set_drvdata(snd_dev, card);
|
||
|
|
|
||
|
|
ret = platform_device_add(snd_dev);
|
||
|
|
if (ret) {
|
||
|
|
dev_err(&pdev->dev, "failed to add soc-audio dev\n");
|
||
|
|
goto err_pdev;
|
||
|
|
}
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, snd_dev);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
err_pdev:
|
||
|
|
platform_device_put(snd_dev);
|
||
|
|
|
||
|
|
err_gpio:
|
||
|
|
detach_gpio_amp(pdata);
|
||
|
|
|
||
|
|
err_clk:
|
||
|
|
clk_put(xtal_clk);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(simtec_audio_core_probe);
|
||
|
|
|
||
|
|
int simtec_audio_remove(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct platform_device *snd_dev = platform_get_drvdata(pdev);
|
||
|
|
|
||
|
|
platform_device_unregister(snd_dev);
|
||
|
|
|
||
|
|
detach_gpio_amp(pdata);
|
||
|
|
clk_put(xtal_clk);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(simtec_audio_remove);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
|
||
|
|
MODULE_DESCRIPTION("ALSA SoC Simtec Audio common support");
|
||
|
|
MODULE_LICENSE("GPL");
|