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linux/sound/soc/pxa/poodle.c
Arnd Bergmann ac70f4d80d ARM: pxa: poodle: use platform data for poodle asoc driver 
The poodle audio driver shows its age by using a custom
gpio api for the "locomo" support chip.

In a perfect world, this would get converted to use gpiolib
and a gpio lookup table.

As the world is not perfect, just pass all the required data
in a custom platform_data structure. to avoid the globally
visible mach/poodle.h header.

Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2022-05-07 22:55:47 +02:00

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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* poodle.c -- SoC audio for Poodle
*
* Copyright 2005 Wolfson Microelectronics PLC.
* Copyright 2005 Openedhand Ltd.
*
* Authors: Liam Girdwood <lrg@slimlogic.co.uk>
* Richard Purdie <richard@openedhand.com>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <asm/hardware/locomo.h>
#include <linux/platform_data/asoc-pxa.h>
#include <linux/platform_data/asoc-poodle.h>
#include "../codecs/wm8731.h"
#include "pxa2xx-i2s.h"
#define POODLE_HP 1
#define POODLE_HP_OFF 0
#define POODLE_SPK_ON 1
#define POODLE_SPK_OFF 0
/* audio clock in Hz - rounded from 12.235MHz */
#define POODLE_AUDIO_CLOCK 12288000
static int poodle_jack_func;
static int poodle_spk_func;
static struct poodle_audio_platform_data *poodle_pdata;
static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
{
/* set up jack connection */
if (poodle_jack_func == POODLE_HP) {
/* set = unmute headphone */
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_l, 1);
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_r, 1);
snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
} else {
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_l, 0);
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_r, 0);
snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
}
/* set the endpoints to their new connection states */
if (poodle_spk_func == POODLE_SPK_ON)
snd_soc_dapm_enable_pin(dapm, "Ext Spk");
else
snd_soc_dapm_disable_pin(dapm, "Ext Spk");
/* signal a DAPM event */
snd_soc_dapm_sync(dapm);
}
static int poodle_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
/* check the jack status at stream startup */
poodle_ext_control(&rtd->card->dapm);
return 0;
}
/* we need to unmute the HP at shutdown as the mute burns power on poodle */
static void poodle_shutdown(struct snd_pcm_substream *substream)
{
/* set = unmute headphone */
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_l, 1);
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_r, 1);
}
static int poodle_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
unsigned int clk = 0;
int ret = 0;
switch (params_rate(params)) {
case 8000:
case 16000:
case 48000:
case 96000:
clk = 12288000;
break;
case 11025:
case 22050:
case 44100:
clk = 11289600;
break;
}
/* set the codec system clock for DAC and ADC */
ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set the I2S system clock as input (unused) */
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
return 0;
}
static const struct snd_soc_ops poodle_ops = {
.startup = poodle_startup,
.hw_params = poodle_hw_params,
.shutdown = poodle_shutdown,
};
static int poodle_get_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = poodle_jack_func;
return 0;
}
static int poodle_set_jack(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
if (poodle_jack_func == ucontrol->value.enumerated.item[0])
return 0;
poodle_jack_func = ucontrol->value.enumerated.item[0];
poodle_ext_control(&card->dapm);
return 1;
}
static int poodle_get_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.enumerated.item[0] = poodle_spk_func;
return 0;
}
static int poodle_set_spk(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
if (poodle_spk_func == ucontrol->value.enumerated.item[0])
return 0;
poodle_spk_func = ucontrol->value.enumerated.item[0];
poodle_ext_control(&card->dapm);
return 1;
}
static int poodle_amp_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
if (SND_SOC_DAPM_EVENT_ON(event))
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_amp_on, 0);
else
locomo_gpio_write(poodle_pdata->locomo_dev,
poodle_pdata->gpio_amp_on, 1);
return 0;
}
/* poodle machine dapm widgets */
static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
SND_SOC_DAPM_HP("Headphone Jack", NULL),
SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
SND_SOC_DAPM_MIC("Microphone", NULL),
};
/* Corgi machine connections to the codec pins */
static const struct snd_soc_dapm_route poodle_audio_map[] = {
/* headphone connected to LHPOUT1, RHPOUT1 */
{"Headphone Jack", NULL, "LHPOUT"},
{"Headphone Jack", NULL, "RHPOUT"},
/* speaker connected to LOUT, ROUT */
{"Ext Spk", NULL, "ROUT"},
{"Ext Spk", NULL, "LOUT"},
{"MICIN", NULL, "Microphone"},
};
static const char * const jack_function[] = {"Off", "Headphone"};
static const char * const spk_function[] = {"Off", "On"};
static const struct soc_enum poodle_enum[] = {
SOC_ENUM_SINGLE_EXT(2, jack_function),
SOC_ENUM_SINGLE_EXT(2, spk_function),
};
static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
poodle_set_jack),
SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
poodle_set_spk),
};
/* poodle digital audio interface glue - connects codec <--> CPU */
SND_SOC_DAILINK_DEFS(wm8731,
DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
static struct snd_soc_dai_link poodle_dai = {
.name = "WM8731",
.stream_name = "WM8731",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &poodle_ops,
SND_SOC_DAILINK_REG(wm8731),
};
/* poodle audio machine driver */
static struct snd_soc_card poodle = {
.name = "Poodle",
.dai_link = &poodle_dai,
.num_links = 1,
.owner = THIS_MODULE,
.controls = wm8731_poodle_controls,
.num_controls = ARRAY_SIZE(wm8731_poodle_controls),
.dapm_widgets = wm8731_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
.dapm_routes = poodle_audio_map,
.num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
.fully_routed = true,
};
static int poodle_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &poodle;
int ret;
poodle_pdata = pdev->dev.platform_data;
locomo_gpio_set_dir(poodle_pdata->locomo_dev,
poodle_pdata->gpio_amp_on, 0);
/* should we mute HP at startup - burning power ?*/
locomo_gpio_set_dir(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_l, 0);
locomo_gpio_set_dir(poodle_pdata->locomo_dev,
poodle_pdata->gpio_mute_r, 0);
card->dev = &pdev->dev;
ret = devm_snd_soc_register_card(&pdev->dev, card);
if (ret)
dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
ret);
return ret;
}
static struct platform_driver poodle_driver = {
.driver = {
.name = "poodle-audio",
.pm = &snd_soc_pm_ops,
},
.probe = poodle_probe,
};
module_platform_driver(poodle_driver);
/* Module information */
MODULE_AUTHOR("Richard Purdie");
MODULE_DESCRIPTION("ALSA SoC Poodle");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:poodle-audio");
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