// SPDX-License-Identifier: GPL-2.0-only
/*
* omap3pandora.c -- SoC audio for Pandora Handheld Console
*
* Author: GraÅžvydas Ignotas <[email protected]>
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <linux/platform_data/asoc-ti-mcbsp.h>
#include "omap-mcbsp.h"
#define PREFIX "ASoC omap3pandora: "
static struct regulator *omap3pandora_dac_reg;
static struct gpio_desc *dac_power_gpio;
static struct gpio_desc *amp_power_gpio;
static int omap3pandora_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
int ret;
/* Set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000,
SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err(PREFIX "can't set codec system clock\n");
return ret;
}
/* Set McBSP clock to external */
ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT,
256 * params_rate(params),
SND_SOC_CLOCK_IN);
if (ret < 0) {
pr_err(PREFIX "can't set cpu system clock\n");
return ret;
}
ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8);
if (ret < 0) {
pr_err(PREFIX "can't set SRG clock divider\n");
return ret;
}
return 0;
}
static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
int ret;
/*
* The PCM1773 DAC datasheet requires 1ms delay between switching
* VCC power on/off and /PD pin high/low
*/
if (SND_SOC_DAPM_EVENT_ON(event)) {
ret = regulator_enable(omap3pandora_dac_reg);
if (ret) {
dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret);
return ret;
}
mdelay(1);
gpiod_set_value(dac_power_gpio, 1);
} else {
gpiod_set_value(dac_power_gpio, 0);
mdelay(1);
regulator_disable(omap3pandora_dac_reg);
}
return 0;
}
static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
if (SND_SOC_DAPM_EVENT_ON(event))
gpiod_set_value(amp_power_gpio, 1);
else
gpiod_set_value(amp_power_gpio, 0);
return 0;
}
/*
* Audio paths on Pandora board:
*
* |O| ---> PCM DAC +-> AMP -> Headphone Jack
* |M| A +--------> Line Out
* |A| <~~clk~~+
* |P| <--- TWL4030 <--------- Line In and MICs
*/
static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = {
SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM,
0, 0, omap3pandora_dac_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM,
0, 0, NULL, 0, omap3pandora_hp_event,
SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_LINE("Line Out", NULL),
SND_SOC_DAPM_MIC("Mic (internal)", NULL),
SND_SOC_DAPM_MIC("Mic (external)", NULL),
SND_SOC_DAPM_LINE("Line In", NULL),
};
static const struct snd_soc_dapm_route omap3pandora_map[] = {
{"PCM DAC", NULL, "APLL Enable"},
{"Headphone Amplifier", NULL, "PCM DAC"},
{"Line Out", NULL, "PCM DAC"},
{"Headphone Jack", NULL, "Headphone Amplifier"},
{"AUXL", NULL, "Line In"},
{"AUXR", NULL, "Line In"},
{"MAINMIC", NULL, "Mic (internal)"},
{"Mic (internal)", NULL, "Mic Bias 1"},
{"SUBMIC", NULL, "Mic (external)"},
{"Mic (external)", NULL, "Mic Bias 2"},
};
static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
/* All TWL4030 output pins are floating */
snd_soc_dapm_nc_pin(dapm, "EARPIECE");
snd_soc_dapm_nc_pin(dapm, "PREDRIVEL");
snd_soc_dapm_nc_pin(dapm, "PREDRIVER");
snd_soc_dapm_nc_pin(dapm, "HSOL");
snd_soc_dapm_nc_pin(dapm, "HSOR");
snd_soc_dapm_nc_pin(dapm, "CARKITL");
snd_soc_dapm_nc_pin(dapm, "CARKITR");
snd_soc_dapm_nc_pin(dapm, "HFL");
snd_soc_dapm_nc_pin(dapm, "HFR");
snd_soc_dapm_nc_pin(dapm, "VIBRA");
return 0;
}
static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
/* Not comnnected */
snd_soc_dapm_nc_pin(dapm, "HSMIC");
snd_soc_dapm_nc_pin(dapm, "CARKITMIC");
snd_soc_dapm_nc_pin(dapm, "DIGIMIC0");
snd_soc_dapm_nc_pin(dapm, "DIGIMIC1");
return 0;
}
static const struct snd_soc_ops omap3pandora_ops = {
.hw_params = omap3pandora_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
SND_SOC_DAILINK_DEFS(out,
DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")),
DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2")));
SND_SOC_DAILINK_DEFS(in,
DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")),
DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4")));
static struct snd_soc_dai_link omap3pandora_dai[] = {
{
.name = "PCM1773",
.stream_name = "HiFi Out",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &omap3pandora_ops,
.init = omap3pandora_out_init,
SND_SOC_DAILINK_REG(out),
}, {
.name = "TWL4030",
.stream_name = "Line/Mic In",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &omap3pandora_ops,
.init = omap3pandora_in_init,
SND_SOC_DAILINK_REG(in),
}
};
/* SoC card */
static struct snd_soc_card snd_soc_card_omap3pandora = {
.name = "omap3pandora",
.owner = THIS_MODULE,
.dai_link = omap3pandora_dai,
.num_links = ARRAY_SIZE(omap3pandora_dai),
.dapm_widgets = omap3pandora_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets),
.dapm_routes = omap3pandora_map,
.num_dapm_routes = ARRAY_SIZE(omap3pandora_map),
};
static struct platform_device *omap3pandora_snd_device;
static int __init omap3pandora_soc_init(void)
{
int ret;
if (!machine_is_omap3_pandora())
return -ENODEV;
pr_info("OMAP3 Pandora SoC init\n");
omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
if (omap3pandora_snd_device == NULL) {
pr_err(PREFIX "Platform device allocation failed\n");
return -ENOMEM;
}
platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora);
ret = platform_device_add(omap3pandora_snd_device);
if (ret) {
pr_err(PREFIX "Unable to add platform device\n");
goto fail2;
}
dac_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
"dac", GPIOD_OUT_LOW);
if (IS_ERR(dac_power_gpio)) {
ret = PTR_ERR(dac_power_gpio);
goto fail3;
}
amp_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev,
"amp", GPIOD_OUT_LOW);
if (IS_ERR(amp_power_gpio)) {
ret = PTR_ERR(amp_power_gpio);
goto fail3;
}
omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc");
if (IS_ERR(omap3pandora_dac_reg)) {
pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n",
dev_name(&omap3pandora_snd_device->dev),
PTR_ERR(omap3pandora_dac_reg));
ret = PTR_ERR(omap3pandora_dac_reg);
goto fail3;
}
return 0;
fail3:
platform_device_del(omap3pandora_snd_device);
fail2:
platform_device_put(omap3pandora_snd_device);
return ret;
}
module_init(omap3pandora_soc_init);
static void __exit omap3pandora_soc_exit(void)
{
regulator_put(omap3pandora_dac_reg);
platform_device_unregister(omap3pandora_snd_device);
}
module_exit(omap3pandora_soc_exit);
MODULE_AUTHOR("Grazvydas Ignotas <[email protected]>");
MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
MODULE_LICENSE("GPL");
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