/*
* 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 <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 int omap3pandora_cmn_hw_params(struct snd_soc_dai *codec_dai,
struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
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, 0,
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)
{
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;
return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
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)
{
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;
return omap3pandora_cmn_hw_params(codec_dai, cpu_dai,
SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS);
}
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_DAC_POWER_GPIO, 1);
gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 1);
} else {
gpio_set_value(OMAP3_PANDORA_AMP_POWER_GPIO, 0);
mdelay(1);
gpio_set_value(OMAP3_PANDORA_DAC_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("PCM DAC", "Playback", SND_SOC_NOPM, 0, 0),
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[] = {
{"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[] = {
{"INL", NULL, "Line In"},
{"INR", NULL, "Line In"},
{"INL", NULL, "Mic (Internal)"},
{"INR", NULL, "Mic (external)"},
};
static int omap3pandora_out_init(struct snd_soc_codec *codec)
{
int ret;
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;
/* 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"),
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,
.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,
.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()) {
pr_debug(PREFIX "Not OMAP3 Pandora\n");
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;
}
return 0;
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)
{
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");
