arch/arm/mach-msm/qdsp6/analog_audio.c

#include <linux/gpio.h>
#include "../pmic.h"
#include <mach/msm_qdsp6_audio.h>

#define GPIO_HEADSET_AMP 157

void analog_init(void)
{
	/* stereo pmic init */
	pmic_spkr_set_gain(LEFT_SPKR, SPKR_GAIN_PLUS12DB);
	pmic_spkr_set_gain(RIGHT_SPKR, SPKR_GAIN_PLUS12DB);
	pmic_mic_set_volt(MIC_VOLT_1_80V);

	gpio_direction_output(GPIO_HEADSET_AMP, 1);
	gpio_set_value(GPIO_HEADSET_AMP, 0);
}

void analog_headset_enable(int en)
{
	/* enable audio amp */
	gpio_set_value(GPIO_HEADSET_AMP, !!en);
}

void analog_speaker_enable(int en)
{
	struct spkr_config_mode scm;
	memset(&scm, 0, sizeof(scm));

	if (en) {
		scm.is_right_chan_en = 1;
		scm.is_left_chan_en = 1;
		scm.is_stereo_en = 1;
		scm.is_hpf_en = 1;
		pmic_spkr_en_mute(LEFT_SPKR, 0);
		pmic_spkr_en_mute(RIGHT_SPKR, 0);
		pmic_set_spkr_configuration(&scm);
		pmic_spkr_en(LEFT_SPKR, 1);
		pmic_spkr_en(RIGHT_SPKR, 1);
		
		/* unmute */
		pmic_spkr_en_mute(LEFT_SPKR, 1);
		pmic_spkr_en_mute(RIGHT_SPKR, 1);
	} else {
		pmic_spkr_en_mute(LEFT_SPKR, 0);
		pmic_spkr_en_mute(RIGHT_SPKR, 0);

		pmic_spkr_en(LEFT_SPKR, 0);
		pmic_spkr_en(RIGHT_SPKR, 0);

		pmic_set_spkr_configuration(&scm);
	}
}

static struct q6audio_analog_ops ops = {
	.init = analog_init,
	.speaker_enable = analog_speaker_enable,
	.headset_enable = analog_headset_enable,
};

static int __init init(void)
{
	q6audio_register_analog_ops(&ops);
	return 0;
}

device_initcall(init);