path: root/sound/soc/codecs/wm_hubs.c

/*
 * wm_hubs.c  --  WM8993/4 common code
 *
 * Copyright 2009 Wolfson Microelectronics plc
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.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.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/mfd/wm8994/registers.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "wm8993.h"
#include "wm_hubs.h"

const DECLARE_TLV_DB_SCALE(wm_hubs_spkmix_tlv, -300, 300, 0);
EXPORT_SYMBOL_GPL(wm_hubs_spkmix_tlv);

static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1650, 150, 0);
static const DECLARE_TLV_DB_SCALE(inmix_sw_tlv, 0, 3000, 0);
static const DECLARE_TLV_DB_SCALE(inmix_tlv, -1500, 300, 1);
static const DECLARE_TLV_DB_SCALE(earpiece_tlv, -600, 600, 0);
static const DECLARE_TLV_DB_SCALE(outmix_tlv, -2100, 300, 0);
static const DECLARE_TLV_DB_SCALE(spkmixout_tlv, -1800, 600, 1);
static const DECLARE_TLV_DB_SCALE(outpga_tlv, -5700, 100, 0);
static const unsigned int spkboost_tlv[] = {
	TLV_DB_RANGE_HEAD(2),
	0, 6, TLV_DB_SCALE_ITEM(0, 150, 0),
	7, 7, TLV_DB_SCALE_ITEM(1200, 0, 0),
};
static const DECLARE_TLV_DB_SCALE(line_tlv, -600, 600, 0);

static const char *speaker_ref_text[] = {
	"SPKVDD/2",
	"VMID",
};

static const struct soc_enum speaker_ref =
	SOC_ENUM_SINGLE(WM8993_SPEAKER_MIXER, 8, 2, speaker_ref_text);

static const char *speaker_mode_text[] = {
	"Class D",
	"Class AB",
};

static const struct soc_enum speaker_mode =
	SOC_ENUM_SINGLE(WM8993_SPKMIXR_ATTENUATION, 8, 2, speaker_mode_text);

static void wait_for_dc_servo(struct snd_soc_codec *codec, unsigned int op)
{
	struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
	unsigned int reg;
	int count = 0;
	int timeout;
	unsigned int val;

	val = op | WM8993_DCS_ENA_CHAN_0 | WM8993_DCS_ENA_CHAN_1;

	/* Trigger the command */
	snd_soc_write(codec, WM8993_DC_SERVO_0, val);

	dev_dbg(codec->dev, "Waiting for DC servo...\n");

	if (hubs->dcs_done_irq)
		timeout = 4;
	else
		timeout = 400;

	do {
		count++;

		if (hubs->dcs_done_irq)
			wait_for_completion_timeout(&hubs->dcs_done,
						    msecs_to_jiffies(250));
		else
			msleep(1);

		reg = snd_soc_read(codec, WM8993_DC_SERVO_0);
		dev_dbg(codec->dev, "DC servo: %x\n", reg);
	} while (reg & op && count < timeout);

	if (reg & op)
		dev_err(codec->dev, "Timed out waiting for DC Servo %x\n",
			op);
}

irqreturn_t wm_hubs_dcs_done(int irq, void *data)
{
	struct wm_hubs_data *hubs = data;

	complete(&hubs->dcs_done);

	return IRQ_HANDLED;
}
EXPORT_SYMBOL_GPL(wm_hubs_dcs_done);

/*
 * Startup calibration of the DC servo
 */
static void calibrate_dc_servo(struct snd_soc_codec *codec)
{
	struct wm_hubs_data *hubs = snd_soc_codec_get_drvdata(codec);
	s8 offset;
	u16 reg, reg_l, reg_r, dcs_cfg, dcs_reg;

	switch (hubs->dcs_readback_mode) {
	case 2:
		dcs_reg =