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linux/sound/soc/omap/omap3pandora.c
Peter Ujfalusi 45656b44f6 ASoC: omap-mcbsp: Create a single driver for McBSP 
The OMAP McBSP driver stack used to contain two different
drivers. One of them was used as kind low-level access to
the IP, while the other driver was the ASoC DAI driver.
There were global, shared structures, in different places,
the McBSP instances are reffered with id numbers (sometimes
0 based, in other cases 1 based id numbers).

Create one single driver for OMAP McBSP with name: omap-mcbsp.
Convert the old omap-mcbsp driver initially to be a library
for the omap-mcbsp DAI driver. With this change we can get rid
of all global variables, structures.

Further cleanup is coming...

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>
2012-03-12 13:34:19 +00:00

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/*
* omap3pandora.c -- SoC audio for Pandora Handheld Console
*
* Author: GraÅžvydas 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 <linux/module.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <plat/mcbsp.h>
#include "omap-mcbsp.h"
#include "omap-pcm.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_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;
/* 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)
{
/*
* 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_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
/* 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");
ret = snd_soc_dapm_new_controls(dapm, omap3pandora_out_dapm_widgets,
ARRAY_SIZE(omap3pandora_out_dapm_widgets));
if (ret < 0)
return ret;
return snd_soc_dapm_add_routes(dapm, omap3pandora_out_map,
ARRAY_SIZE(omap3pandora_out_map));
}
static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd)
{
struct snd_soc_codec *codec = rtd->codec;
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
/* 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");
ret = snd_soc_dapm_new_controls(dapm, omap3pandora_in_dapm_widgets,
ARRAY_SIZE(omap3pandora_in_dapm_widgets));
if (ret < 0)
return ret;
return snd_soc_dapm_add_routes(dapm, omap3pandora_in_map,
ARRAY_SIZE(omap3pandora_in_map));
}
static struct snd_soc_ops omap3pandora_ops = {
.hw_params = omap3pandora_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_name = "omap-mcbsp.2",
.codec_dai_name = "twl4030-hifi",
.platform_name = "omap-pcm-audio",
.codec_name = "twl4030-codec",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &omap3pandora_ops,
.init = omap3pandora_out_init,
}, {
.name = "TWL4030",
.stream_name = "Line/Mic In",
.cpu_dai_name = "omap-mcbsp.4",
.codec_dai_name = "twl4030-hifi",
.platform_name = "omap-pcm-audio",
.codec_name = "twl4030-codec",
.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS,
.ops = &omap3pandora_ops,
.init = omap3pandora_in_init,
}
};
/* 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),
};
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, &snd_soc_card_omap3pandora);
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));
ret = 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");
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