path: root/sound/soc/codecs/adau1701.c

/*
 * Driver for ADAU1701 SigmaDSP processor
 *
 * Copyright 2011 Analog Devices Inc.
 * Author: Lars-Peter Clausen <lars@metafoo.de>
 *	based on an inital version by Cliff Cai <cliff.cai@analog.com>
 *
 * Licensed under the GPL-2 or later.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>

#include "sigmadsp.h"
#include "adau1701.h"

#define ADAU1701_DSPCTRL	0x081c
#define ADAU1701_SEROCTL	0x081e
#define ADAU1701_SERICTL	0x081f

#define ADAU1701_AUXNPOW	0x0822
#define ADAU1701_PINCONF_0	0x0820
#define ADAU1701_PINCONF_1	0x0821
#define ADAU1701_AUXNPOW	0x0822

#define ADAU1701_OSCIPOW	0x0826
#define ADAU1701_DACSET		0x0827

#define ADAU1701_MAX_REGISTER	0x0828

#define ADAU1701_DSPCTRL_CR		(1 << 2)
#define ADAU1701_DSPCTRL_DAM		(1 << 3)
#define ADAU1701_DSPCTRL_ADM		(1 << 4)
#define ADAU1701_DSPCTRL_SR_48		0x00
#define ADAU1701_DSPCTRL_SR_96		0x01
#define ADAU1701_DSPCTRL_SR_192		0x02
#define ADAU1701_DSPCTRL_SR_MASK	0x03

#define ADAU1701_SEROCTL_INV_LRCLK	0x2000
#define ADAU1701_SEROCTL_INV_BCLK	0x1000
#define ADAU1701_SEROCTL_MASTER		0x0800

#define ADAU1701_SEROCTL_OBF16		0x0000
#define ADAU1701_SEROCTL_OBF8		0x0200
#define ADAU1701_SEROCTL_OBF4		0x0400
#define ADAU1701_SEROCTL_OBF2		0x0600
#define ADAU1701_SEROCTL_OBF_MASK	0x0600

#define ADAU1701_SEROCTL_OLF1024	0x0000
#define ADAU1701_SEROCTL_OLF512		0x0080
#define ADAU1701_SEROCTL_OLF256		0x0100
#define ADAU1701_SEROCTL_OLF_MASK	0x0180

#define ADAU1701_SEROCTL_MSB_DEALY1	0x0000
#define ADAU1701_SEROCTL_MSB_DEALY0	0x0004
#define ADAU1701_SEROCTL_MSB_DEALY8	0x0008
#define ADAU1701_SEROCTL_MSB_DEALY12	0x000c
#define ADAU1701_SEROCTL_MSB_DEALY16	0x0010
#define ADAU1701_SEROCTL_MSB_DEALY_MASK	0x001c

#define ADAU1701_SEROCTL_WORD_LEN_24	0x0000
#define ADAU1701_SEROCTL_WORD_LEN_20	0x0001
#define ADAU1701_SEROCTL_WORD_LEN_16	0x0002
#define ADAU1701_SEROCTL_WORD_LEN_MASK	0x0003

#define ADAU1701_AUXNPOW_VBPD		0x40
#define ADAU1701_AUXNPOW_VRPD		0x20

#define ADAU1701_SERICTL_I2S		0
#define ADAU1701_SERICTL_LEFTJ		1
#define ADAU1701_SERICTL_TDM		2
#define ADAU1701_SERICTL_RIGHTJ_24	3
#define ADAU1701_SERICTL_RIGHTJ_20	4
#define ADAU1701_SERICTL_RIGHTJ_18	5
#define ADAU1701_SERICTL_RIGHTJ_16	6
#define ADAU1701_SERICTL_MODE_MASK	7
#define ADAU1701_SERICTL_INV_BCLK	BIT(3)
#define ADAU1701_SERICTL_INV_LRCLK	BIT(4)

#define ADAU1701_OSCIPOW_OPD		0x04
#define ADAU1701_DACSET_DACINIT		1

#define ADAU1707_CLKDIV_UNSET		(-1U)

#define ADAU1701_FIRMWARE "adau1701.bin"

struct adau1701 {
	int gpio_nreset;
	int gpio_pll_mode[2];
	unsigned int dai_fmt;
	unsigned int pll_clkdiv;
	unsigned int sysclk;
	struct regmap *regmap;
	u8 pin_config[12];
};

static const struct snd_kcontrol_new adau1701_controls[] = {
	SOC_SINGLE("Master Capture Switch", ADAU1701_DSPCTRL, 4, 1, 0),
};

static const struct snd_soc_dapm_widget adau1701_dapm_widgets[] = {
	SND_SOC_DAPM_DAC("DAC0", "Playback", ADAU1701_AUXNPOW, 3, 1),
	SND_SOC_DAPM_DAC("DAC1", "Playback", ADAU1701_AUXNPOW, 2, 1),
	SND_SOC_DAPM_DAC("DAC2", "Playback", ADAU1701_AUXNPOW, 1, 1),
	SND_SOC_DAPM_DAC("DAC3", "Playback", ADAU1701_AUXNPOW, 0, 1),
	SND_SOC_DAPM_ADC("ADC", "Capture", ADAU1701_AUXNPOW, 7, 1),

	SND_SOC_DAPM_OUTPUT("OUT0"),
	SND_SOC_DAPM_OUTPUT("OUT1"),
	SND_SOC_DAPM_OUTPUT("OUT2"),
	SND_SOC_DAPM_OUTPUT("OUT3"),
	SND_SOC_DAPM_INPUT("IN0"),
	SND_SOC_DAPM_INPUT("IN1"),
};

static const struct snd_soc_dapm_route adau1701_dapm_routes[] = {
	{ "OUT0", NULL, "DAC0" },
	{ "OUT1", NULL, "DAC1" },
	{ "OUT2", NULL, "DAC2" },
	{ "OUT3", NULL, "DAC3" },

	{ "ADC", NULL, "IN0" },
	{ "ADC", NULL, "IN1" },
};

static unsigned int adau1701_register_size(struct device *dev,
		unsigned int reg)
{
	switch (reg) {
	case ADAU1701_PINCONF_0:
	case ADAU1701_PINCONF_1:
		return 3;
	case ADAU1701_DSPCTRL:
	case ADAU1701_SEROCTL:
	case ADAU1701_AUXNPOW:
	case ADAU1701_OSCIPOW:
	case ADAU1701_DACSET:
		return 2;
	case ADAU1701_SERICTL:
		return 1;
	}

	dev_err(dev, "Unsupported register address: %d\n", reg);
	return 0;
}

static bool adau1701_volatile_reg(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case ADAU1701_DACSET:
		return true;
	default:
		return false;
	}
}

static int adau1701_reg_write(void *context, unsigned int reg,
			      unsigned int value)
{
	struct i2c_client *client = context;
	unsigned int i;
	unsigned int size;
	uint8_t buf[5];
	int ret;

	size = adau1701_register_size(&client->dev, reg);
	if (size == 0)
		return -EINVAL;

	buf[0] = reg >> 8;
	buf[1] = reg & 0xff;

	for (i = size + 1; i >= 2; --i) {
		buf[i] = value;
		value >>= 8;
	}

	ret = i2c_master_send(client, buf, size + 2);
	if (ret == size + 2)
		return 0;
	else if (ret < 0)
		return ret;
	else
		return -EIO;
}

static int adau1701_reg_read(void *context, unsigned int reg,
			     unsigned int *value)
{
	int ret;
	unsigned int i;
	unsigned int size;
	uint8_t send_buf[2], recv_buf[3];
	struct i2c_client *client = context;
	struct i2c_msg msgs[2];

	size = adau1701_register_size(&client->dev, reg);
	if (size == 0)
		return -EINVAL;

	send_buf[0] = reg >> 8;
	send_buf[1] = reg & 0xff;

	msgs[0].addr = client->addr;
	msgs[0].len = sizeof(send_buf);
	msgs[0].buf = send_buf;
	msgs[0].flags = 0;

	msgs[1].addr = client->addr;
	msgs[1].len = size;
	msgs[1].buf = recv_buf;
	msgs[1].flags = I2C_M_RD;

	ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
	if (ret < 0)
		return ret;
	else if (ret !=