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linux-next/sound/soc/omap/omap3pandora.c
Grazvydas Ignotas c50749de02 ASoC: pandora: Add DAC regulator support
Pandora's external DAC is connected to VSIM TWL4030 supply, so let's
start switching it too to save more power.
Also DAC got it's own DAPM handler.

Signed-off-by: Grazvydas Ignotas <notasas@gmail.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2010-02-05 17:08:16 +00:00

364 lines
9.8 KiB
C

/*
* omap3pandora.c -- SoC audio for Pandora Handheld Console
*
* Author: Gražvydas Ignotas <notasas@gmail.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/regulator/consumer.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/mach-types.h>
#include "omap-mcbsp.h"
#include "omap-pcm.h"
#include "../codecs/twl4030.h"
#define OMAP3_PANDORA_DAC_POWER_GPIO 118
#define OMAP3_PANDORA_AMP_POWER_GPIO 14
#define PREFIX "ASoC omap3pandora: "
static struct regulator *omap3pandora_dac_reg;
static int omap3pandora_cmn_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params, unsigned int fmt)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
int ret;
/* Set codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, fmt);
if (ret < 0) {
pr_err(PREFIX "can't set codec DAI configuration\n");
return ret;
}
/* Set cpu DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret < 0) {
pr_err(PREFIX "can't set cpu DAI configuration\n");
return 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_out_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
return omap3pandora_cmn_hw_params(substream, params,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_IB_NF |
SND_SOC_DAIFMT_CBS_CFS);
}
static int omap3pandora_in_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
return omap3pandora_cmn_hw_params(substream, params,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
}
static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *k, int event)
{
/*
* 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)) {
regulator_enable(omap3pandora_dac_reg);
mdelay(1);
gpio_set_value(OMAP3_PANDORA_DAC_POWER_GPIO, 1);
} else {
gpio_set_value(OMAP3_PANDORA_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))
gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
else
gpio_set_value(OMAP3_PANDORA_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_out_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),
};
static const struct snd_soc_dapm_widget omap3pandora_in_dapm_widgets[] = {
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_out_map[] = {
{"PCM DAC", NULL, "APLL Enable"},
{"Headphone Amplifier", NULL, "PCM DAC"},
{"Line Out", NULL, "PCM DAC"},
{"Headphone Jack", NULL, "Headphone Amplifier"},
};
static const struct snd_soc_dapm_route omap3pandora_in_map[] = {
{"AUXL", NULL, "Line In"},
{"AUXR", NULL, "Line In"},
{"MAINMIC", NULL, "Mic Bias 1"},
{"Mic Bias 1", NULL, "Mic (internal)"},
{"SUBMIC", NULL, "Mic Bias 2"},
{"Mic Bias 2", NULL, "Mic (external)"},
};
static int omap3pandora_out_init(struct snd_soc_codec *codec)
{
int ret;
/* All TWL4030 output pins are floating */
snd_soc_dapm_nc_pin(codec, "OUTL");
snd_soc_dapm_nc_pin(codec, "OUTR");
snd_soc_dapm_nc_pin(codec, "EARPIECE");
snd_soc_dapm_nc_pin(codec, "PREDRIVEL");
snd_soc_dapm_nc_pin(codec, "PREDRIVER");
snd_soc_dapm_nc_pin(codec, "HSOL");
snd_soc_dapm_nc_pin(codec, "HSOR");
snd_soc_dapm_nc_pin(codec, "CARKITL");
snd_soc_dapm_nc_pin(codec, "CARKITR");
snd_soc_dapm_nc_pin(codec, "HFL");
snd_soc_dapm_nc_pin(codec, "HFR");
snd_soc_dapm_nc_pin(codec, "VIBRA");
ret = snd_soc_dapm_new_controls(codec, omap3pandora_out_dapm_widgets,
ARRAY_SIZE(omap3pandora_out_dapm_widgets));
if (ret < 0)
return ret;
snd_soc_dapm_add_routes(codec, omap3pandora_out_map,
ARRAY_SIZE(omap3pandora_out_map));
return snd_soc_dapm_sync(codec);
}
static int omap3pandora_in_init(struct snd_soc_codec *codec)
{
int ret;
/* Not comnnected */
snd_soc_dapm_nc_pin(codec, "HSMIC");
snd_soc_dapm_nc_pin(codec, "CARKITMIC");
snd_soc_dapm_nc_pin(codec, "DIGIMIC0");
snd_soc_dapm_nc_pin(codec, "DIGIMIC1");
ret = snd_soc_dapm_new_controls(codec, omap3pandora_in_dapm_widgets,
ARRAY_SIZE(omap3pandora_in_dapm_widgets));
if (ret < 0)
return ret;
snd_soc_dapm_add_routes(codec, omap3pandora_in_map,
ARRAY_SIZE(omap3pandora_in_map));
return snd_soc_dapm_sync(codec);
}
static struct snd_soc_ops omap3pandora_out_ops = {
.hw_params = omap3pandora_out_hw_params,
};
static struct snd_soc_ops omap3pandora_in_ops = {
.hw_params = omap3pandora_in_hw_params,
};
/* Digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link omap3pandora_dai[] = {
{
.name = "PCM1773",
.stream_name = "HiFi Out",
.cpu_dai = &omap_mcbsp_dai[0],
.codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
.ops = &omap3pandora_out_ops,
.init = omap3pandora_out_init,
}, {
.name = "TWL4030",
.stream_name = "Line/Mic In",
.cpu_dai = &omap_mcbsp_dai[1],
.codec_dai = &twl4030_dai[TWL4030_DAI_HIFI],
.ops = &omap3pandora_in_ops,
.init = omap3pandora_in_init,
}
};
/* SoC card */
static struct snd_soc_card snd_soc_card_omap3pandora = {
.name = "omap3pandora",
.platform = &omap_soc_platform,
.dai_link = omap3pandora_dai,
.num_links = ARRAY_SIZE(omap3pandora_dai),
};
/* Audio subsystem */
static struct snd_soc_device omap3pandora_snd_data = {
.card = &snd_soc_card_omap3pandora,
.codec_dev = &soc_codec_dev_twl4030,
};
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");
ret = gpio_request(OMAP3_PANDORA_DAC_POWER_GPIO, "dac_power");
if (ret) {
pr_err(PREFIX "Failed to get DAC power GPIO\n");
return ret;
}
ret = gpio_direction_output(OMAP3_PANDORA_DAC_POWER_GPIO, 0);
if (ret) {
pr_err(PREFIX "Failed to set DAC power GPIO direction\n");
goto fail0;
}
ret = gpio_request(OMAP3_PANDORA_AMP_POWER_GPIO, "amp_power");
if (ret) {
pr_err(PREFIX "Failed to get amp power GPIO\n");
goto fail0;
}
ret = gpio_direction_output(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
if (ret) {
pr_err(PREFIX "Failed to set amp power GPIO direction\n");
goto fail1;
}
omap3pandora_snd_device = platform_device_alloc("soc-audio", -1);
if (omap3pandora_snd_device == NULL) {
pr_err(PREFIX "Platform device allocation failed\n");
ret = -ENOMEM;
goto fail1;
}
platform_set_drvdata(omap3pandora_snd_device, &omap3pandora_snd_data);
omap3pandora_snd_data.dev = &omap3pandora_snd_device->dev;
*(unsigned int *)omap_mcbsp_dai[0].private_data = 1; /* McBSP2 */
*(unsigned int *)omap_mcbsp_dai[1].private_data = 3; /* McBSP4 */
ret = platform_device_add(omap3pandora_snd_device);
if (ret) {
pr_err(PREFIX "Unable to add platform device\n");
goto fail2;
}
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));
goto fail3;
}
return 0;
fail3:
platform_device_del(omap3pandora_snd_device);
fail2:
platform_device_put(omap3pandora_snd_device);
fail1:
gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
fail0:
gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
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);
gpio_free(OMAP3_PANDORA_AMP_POWER_GPIO);
gpio_free(OMAP3_PANDORA_DAC_POWER_GPIO);
}
module_exit(omap3pandora_soc_exit);
MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>");
MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora");
MODULE_LICENSE("GPL");