/*
 * card driver for models with WM8776/WM8766 DACs (Xonar DS)
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 *
 *
 *  This driver is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License, version 2.
 *
 *  This driver 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 driver; if not, see <http://www.gnu.org/licenses/>.
 */

/*
 * Xonar DS
 * --------
 *
 * CMI8788:
 *
 * SPI 0 -> WM8766 (surround, center/LFE, back)
 * SPI 1 -> WM8776 (front, input)
 *
 * GPIO 4 <- headphone detect
 * GPIO 6 -> route input jack to input 1/2 (1/0)
 * GPIO 7 -> enable output to speakers
 * GPIO 8 -> enable output to speakers
 */

#include <linux/pci.h>
#include <linux/delay.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include "xonar.h"
#include "wm8776.h"
#include "wm8766.h"

#define GPIO_DS_HP_DETECT	0x0010
#define GPIO_DS_INPUT_ROUTE	0x0040
#define GPIO_DS_OUTPUT_ENABLE	0x0180

#define LC_CONTROL_LIMITER	0x40000000
#define LC_CONTROL_ALC		0x20000000

struct xonar_wm87x6 {
	struct xonar_generic generic;
	u16 wm8776_regs[0x17];
	u16 wm8766_regs[0x10];
	struct snd_kcontrol *line_adcmux_control;
	struct snd_kcontrol *mic_adcmux_control;
	struct snd_kcontrol *lc_controls[13];
};

static void wm8776_write(struct oxygen *chip,
			 unsigned int reg, unsigned int value)
{
	struct xonar_wm87x6 *data = chip->model_data;

	oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
			 OXYGEN_SPI_DATA_LENGTH_2 |
			 OXYGEN_SPI_CLOCK_160 |
			 (1 << OXYGEN_SPI_CODEC_SHIFT) |
			 OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
			 (reg << 9) | value);
	if (reg < ARRAY_SIZE(data->wm8776_regs)) {
		if (reg >= WM8776_HPLVOL && reg <= WM8776_DACMASTER)
			value &= ~WM8776_UPDATE;
		data->wm8776_regs[reg] = value;
	}
}

static void wm8776_write_cached(struct oxygen *chip,
				unsigned int reg, unsigned int value)
{
	struct xonar_wm87x6 *data = chip->model_data;

	if (reg >= ARRAY_SIZE(data->wm8776_regs) ||
	    value != data->wm8776_regs[reg])
		wm8776_write(chip, reg, value);
}

static void wm8766_write(struct oxygen *chip,
			 unsigned int reg, unsigned int value)
{
	struct xonar_wm87x6 *data = chip->model_data;

	oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER |
			 OXYGEN_SPI_DATA_LENGTH_2 |
			 OXYGEN_SPI_CLOCK_160 |
			 (0 << OXYGEN_SPI_CODEC_SHIFT) |
			 OXYGEN_SPI_CEN_LATCH_CLOCK_LO,
			 (reg << 9) | value);
	if (reg < ARRAY_SIZE(data->wm8766_regs))
		data->wm8766_regs[reg] = value;
}

static void wm8766_write_cached(struct oxygen *chip,
				unsigned int reg, unsigned int value)
{
	struct xonar_wm87x6 *data = chip->model_data;

	if (reg >= ARRAY_SIZE(data->wm8766_regs) ||
	    value != data->wm8766_regs[reg]) {
		if ((reg >= WM8766_LDA1 && reg <= WM8766_RDA1) ||
		    (reg >= WM8766_LDA2 && reg <= WM8766_MASTDA))
			value &= ~WM8766_UPDATE;
		wm8766_write(chip, reg, value);
	}
}

static void wm8776_registers_init(struct oxygen *chip)
{
	struct xonar_wm87x6 *data = chip->model_data;

	wm8776_write(chip, WM8776_RESET, 0);
	wm8776_write(chip, WM8776_DACCTRL1, WM8776_DZCEN |
		     WM8776_PL_LEFT_LEFT | WM8776_PL_RIGHT_RIGHT);
	wm8776_write(chip, WM8776_DACMUTE, chip->dac_mute ? WM8776_DMUTE : 0);
	wm8776_write(chip, WM8776_DACIFCTRL,
		     WM8776_DACFMT_LJUST | WM8776_DACWL_24);
	wm8776_write(chip, WM8776_ADCIFCTRL,
		     data->wm8776_regs[WM8776_ADCIFCTRL]);
	wm8776_write(chip, WM8776_MSTRCTRL, data->wm8776_regs[WM8776_MSTRCTRL]);
	wm8776_write(chip, WM8776_PWRDOWN, data->wm8776_regs[WM8776_PWRDOWN]);
	wm8776_write(chip, WM8776_HPLVOL, data->wm8776_regs[WM8776_HPLVOL]);
	wm8776_write(chip, WM8776_HPRVOL, data->wm8776_regs[WM8776_HPRVOL] |
		     WM8776_UPDATE);
	wm8776_write(chip, WM8776_ADCLVOL, data->wm8776_regs[WM8776_ADCLVOL]);
	wm8776_write(chip, WM8776_ADCRVOL, data->wm8776_regs[WM8776_ADCRVOL]);
	wm8776_write(chip, WM8776_ADCMUX, data->wm8776_regs[WM8776_ADCMUX]);
	wm8776_write(chip, WM8776_DACLVOL, chip->dac_volume[0]);
	wm8776_write(chip, WM8776_DACRVOL, chip->dac_volume[1] | WM8776_UPDATE);
}

static void wm8766_registers_init(struct oxygen *chip)
{
	wm8766_write(chip, WM8766_RESET, 0);
	wm8766_write(chip, WM8766_INT_CTRL, WM8766_FMT_LJUST | WM8766_IWL_24);
	wm8766_write(chip, WM8766_DAC_CTRL2,
		     WM8766_ZCD | (chip->dac_mute ? WM8766_DMUTE_MASK : 0));
	wm8766_write(chip, WM8766_LDA1, chip->dac_volume[2]);
	wm8766_write(chip, WM8766_RDA1, chip->dac_volume[3]);
	wm8766_write(chip, WM8766_LDA2, chip->dac_volume[4]);
	wm8766_write(chip, WM8766_RDA2, chip->dac_volume[5]);
	wm8766_write(chip, WM8766_LDA3, chip->dac_volume[6]);
	wm8766_write(chip, WM8766_RDA3, chip->dac_volume[7] | WM8766_UPDATE);
}

static void wm8776_init(struct oxygen *chip)
{
	struct xonar_wm87x6 *data = chip->model_data;

	data->wm8776_regs[WM8776_HPLVOL] = (0x79 - 60) | WM8776_HPZCEN;
	data->wm8776_regs[WM8776_HPRVOL] = (0x79 - 60) | WM8776_HPZCEN;
	data->wm8776_regs[WM8776_ADCIFCTRL] =
		WM8776_ADCFMT_LJUST | WM8776_ADCWL_24 | WM8776_ADCMCLK;
	data->wm8776_regs[WM8776_MSTRCTRL] =
		WM8776_ADCRATE_256 | WM8776_DACRATE_256;
	data->wm8776_regs[WM8776_PWRDOWN] = WM8776_HPPD;
	data->wm8776_regs[WM8776_ADCLVOL] = 0xa5 | WM8776_ZCA;
	data->wm8776_regs[WM8776_ADCRVOL] = 0xa5 | WM8776_ZCA;
	data->wm8776_regs[WM8776_ADCMUX] = 0x001;
	wm8776_registers_init(chip);
}

static void xonar_ds_init(struct oxygen *chip)
{
	struct xonar_wm87x6 *data = chip->model_data;

	data->generic.anti_pop_delay = 300;
	data->generic.output_enable_bit = GPIO_DS_OUTPUT_ENABLE;

	wm8776_init(chip);
	wm8766_registers_init(chip);

	oxygen_write16_masked(chip, OXYGEN_GPIO_CONTROL, GPIO_DS_INPUT_ROUTE,
			      GPIO_DS_HP_DETECT | GPIO_DS_INPUT_ROUTE);
	oxygen_set_bits16(chip, OXYGEN_GPIO_DATA, GPIO_DS_INPUT_ROUTE);
	oxygen_set_bits16(chip, OXYGEN_GPIO_INTERRUPT_MASK, GPIO_DS_HP_DETECT);
	chip->interrupt_mask |= OXYGEN_INT_GPIO;

	xonar_enable_output(chip);

	snd_component_add(chip->card, "WM8776");
	snd_component_add(chip->card, "WM8766");
}

static void xonar_ds_cleanup(struct oxygen *chip)
{
	xonar_disable_output(chip);
	wm8776_write(chip, WM8776_RESET, 0);
}

static void xonar_ds_suspend(struct oxygen *chip)
{
	xonar_ds_cleanup(chip);
}

static void xonar_ds_resume(struct oxygen *chip)
{
	wm8776_registers_init(chip);
	wm8766_registers_init(chip);
	xonar_enable_output(chip);
}

static void wm8776_adc_hardware_filter(unsigned int channel,
				       struct snd_pcm_hardware *hardware)
{
	if (channel == PCM_A) {
		hardware->rates = SNDRV_PCM_RATE_32000 |
				  SNDRV_PCM_RATE_44100 |
				  SNDRV_PCM_RATE_48000 |
				  SNDRV_PCM_RATE_64000 |
				  SNDRV_PCM_RATE_88200 |
				  SNDRV_PCM_RATE_96000;
		hardware->rate_max = 96000;
	}
}

static void set_wm87x6_dac_params(struct oxygen *chip,
				  struct snd_pcm_hw_params *params)
{
}

static void set_wm8776_adc_params(struct oxygen *chip,
				  struct snd_pcm_hw_params *params)
{
	u16 reg;

	reg = WM8776_ADCRATE_256 | WM8776_DACRATE_256;
	if (params_rate(params) > 48000)
		reg |= WM8776_ADCOSR;
	wm8776_write_cached(chip, WM8776_MSTRCTRL, reg);
}

static void update_wm8776_volume(struct oxygen *chip)
{
	struct xonar_wm87x6 *data = chip->model_data;
	u8 to_change;

	if (chip->dac_volume[0] == chip->dac_volume[1]) {
		if (chip->dac_volume[0] != data->wm8776_regs[WM8776_DACLVOL] ||
		    chip->dac_volume[1] != data->wm8776_regs[WM8776_DACRVOL]) {
			wm8776_write(chip, WM8776_DACMASTER,
				     chip->dac_volume[0] | WM8776_UPDATE);
			data->wm8776_regs[WM8776_DACLVOL] = chip->dac_volume[0];
			data->wm8776_regs[WM8776_DACRVOL] = chip->dac_volume[0];
		}
	} else {
		to_change = (chip->dac_volume[0] !=
			     data->wm8776_regs[WM8776_DACLVOL]) << 0;
		to_change |= (chip->dac_volume[1] !=
			      data->wm8776_regs[WM8776_DACLVOL]) << 1;
		if (to_change & 1)
			wm8776_write(chip, WM8776_DACLVOL, chip->dac_volume[0] |
				     ((to_change & 2) ? 0 : WM8776_UPDATE));
		if (to_change & 2)
			wm8776_write(chip, WM8776_DACRVOL,
				     chip->dac_volume[1] | WM8776_UPDATE);
	}
}

static void update_wm87x6_volume(struct oxygen *chip)
{
	static const u8 wm8766_regs[6] = {
		WM8766_LDA1, WM8766_RDA1,
		WM8766_LDA2, WM8766_RDA2,
		WM8766_LDA3, WM8766_RDA3,
	};
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int i;
	u8 to_change;

	update_wm8776_volume(chip);
	if (chip->dac_volume[2] == chip->dac_volume[3] &&
	    chip->dac_volume[2] == chip->dac_volume[4] &&
	    chip->dac_volume[2] == chip->dac_volume[5] &&
	    chip->dac_volume[2] == chip->dac_volume[6] &&
	    chip->dac_volume[2] == chip->dac_volume[7]) {
		to_change = 0;
		for (i = 0; i < 6; ++i)
			if (chip->dac_volume[2] !=
			    data->wm8766_regs[wm8766_regs[i]])
				to_change = 1;
		if (to_change) {
			wm8766_write(chip, WM8766_MASTDA,
				     chip->dac_volume[2] | WM8766_UPDATE);
			for (i = 0; i < 6; ++i)
				data->wm8766_regs[wm8766_regs[i]] =
					chip->dac_volume[2];
		}
	} else {
		to_change = 0;
		for (i = 0; i < 6; ++i)
			to_change |= (chip->dac_volume[2 + i] !=
				      data->wm8766_regs[wm8766_regs[i]]) << i;
		for (i = 0; i < 6; ++i)
			if (to_change & (1 << i))
				wm8766_write(chip, wm8766_regs[i],
					     chip->dac_volume[2 + i] |
					     ((to_change & (0x3e << i))
					      ? 0 : WM8766_UPDATE));
	}
}

static void update_wm8776_mute(struct oxygen *chip)
{
	wm8776_write_cached(chip, WM8776_DACMUTE,
			    chip->dac_mute ? WM8776_DMUTE : 0);
}

static void update_wm87x6_mute(struct oxygen *chip)
{
	update_wm8776_mute(chip);
	wm8766_write_cached(chip, WM8766_DAC_CTRL2, WM8766_ZCD |
			    (chip->dac_mute ? WM8766_DMUTE_MASK : 0));
}

static void xonar_ds_gpio_changed(struct oxygen *chip)
{
	u16 bits;

	bits = oxygen_read16(chip, OXYGEN_GPIO_DATA);
	snd_printk(KERN_INFO "HP detect: %d\n", !!(bits & GPIO_DS_HP_DETECT));
}

static int wm8776_bit_switch_get(struct snd_kcontrol *ctl,
				 struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	u16 bit = ctl->private_value & 0xffff;
	unsigned int reg_index = (ctl->private_value >> 16) & 0xff;
	bool invert = (ctl->private_value >> 24) & 1;

	value->value.integer.value[0] =
		((data->wm8776_regs[reg_index] & bit) != 0) ^ invert;
	return 0;
}

static int wm8776_bit_switch_put(struct snd_kcontrol *ctl,
				 struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	u16 bit = ctl->private_value & 0xffff;
	u16 reg_value;
	unsigned int reg_index = (ctl->private_value >> 16) & 0xff;
	bool invert = (ctl->private_value >> 24) & 1;
	int changed;

	mutex_lock(&chip->mutex);
	reg_value = data->wm8776_regs[reg_index] & ~bit;
	if (value->value.integer.value[0] ^ invert)
		reg_value |= bit;
	changed = reg_value != data->wm8776_regs[reg_index];
	if (changed)
		wm8776_write(chip, reg_index, reg_value);
	mutex_unlock(&chip->mutex);
	return changed;
}

static int wm8776_field_enum_info(struct snd_kcontrol *ctl,
				  struct snd_ctl_elem_info *info)
{
	static const char *const hld[16] = {
		"0 ms", "2.67 ms", "5.33 ms", "10.6 ms",
		"21.3 ms", "42.7 ms", "85.3 ms", "171 ms",
		"341 ms", "683 ms", "1.37 s", "2.73 s",
		"5.46 s", "10.9 s", "21.8 s", "43.7 s",
	};
	static const char *const atk_lim[11] = {
		"0.25 ms", "0.5 ms", "1 ms", "2 ms",
		"4 ms", "8 ms", "16 ms", "32 ms",
		"64 ms", "128 ms", "256 ms",
	};
	static const char *const atk_alc[11] = {
		"8.40 ms", "16.8 ms", "33.6 ms", "67.2 ms",
		"134 ms", "269 ms", "538 ms", "1.08 s",
		"2.15 s", "4.3 s", "8.6 s",
	};
	static const char *const dcy_lim[11] = {
		"1.2 ms", "2.4 ms", "4.8 ms", "9.6 ms",
		"19.2 ms", "38.4 ms", "76.8 ms", "154 ms",
		"307 ms", "614 ms", "1.23 s",
	};
	static const char *const dcy_alc[11] = {
		"33.5 ms", "67.0 ms", "134 ms", "268 ms",
		"536 ms", "1.07 s", "2.14 s", "4.29 s",
		"8.58 s", "17.2 s", "34.3 s",
	};
	static const char *const tranwin[8] = {
		"0 us", "62.5 us", "125 us", "250 us",
		"500 us", "1 ms", "2 ms", "4 ms",
	};
	u8 max;
	const char *const *names;

	max = (ctl->private_value >> 12) & 0xf;
	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = max + 1;
	if (info->value.enumerated.item > max)
		info->value.enumerated.item = max;
	switch ((ctl->private_value >> 24) & 0x1f) {
	case WM8776_ALCCTRL2:
		names = hld;
		break;
	case WM8776_ALCCTRL3:
		if (((ctl->private_value >> 20) & 0xf) == 0) {
			if (ctl->private_value & LC_CONTROL_LIMITER)
				names = atk_lim;
			else
				names = atk_alc;
		} else {
			if (ctl->private_value & LC_CONTROL_LIMITER)
				names = dcy_lim;
			else
				names = dcy_alc;
		}
		break;
	case WM8776_LIMITER:
		names = tranwin;
		break;
	default:
		return -ENXIO;
	}
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
}

static int wm8776_field_volume_info(struct snd_kcontrol *ctl,
				    struct snd_ctl_elem_info *info)
{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 1;
	info->value.integer.min = (ctl->private_value >> 8) & 0xf;
	info->value.integer.max = (ctl->private_value >> 12) & 0xf;
	return 0;
}

static void wm8776_field_set_from_ctl(struct snd_kcontrol *ctl)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int value, reg_index, mode;
	u8 min, max, shift;
	u16 mask, reg_value;
	bool invert;

	if ((data->wm8776_regs[WM8776_ALCCTRL1] & WM8776_LCSEL_MASK) ==
	    WM8776_LCSEL_LIMITER)
		mode = LC_CONTROL_LIMITER;
	else
		mode = LC_CONTROL_ALC;
	if (!(ctl->private_value & mode))
		return;

	value = ctl->private_value & 0xf;
	min = (ctl->private_value >> 8) & 0xf;
	max = (ctl->private_value >> 12) & 0xf;
	mask = (ctl->private_value >> 16) & 0xf;
	shift = (ctl->private_value >> 20) & 0xf;
	reg_index = (ctl->private_value >> 24) & 0x1f;
	invert = (ctl->private_value >> 29) & 0x1;

	if (invert)
		value = max - (value - min);
	reg_value = data->wm8776_regs[reg_index];
	reg_value &= ~(mask << shift);
	reg_value |= value << shift;
	wm8776_write_cached(chip, reg_index, reg_value);
}

static int wm8776_field_set(struct snd_kcontrol *ctl, unsigned int value)
{
	struct oxygen *chip = ctl->private_data;
	u8 min, max;
	int changed;

	min = (ctl->private_value >> 8) & 0xf;
	max = (ctl->private_value >> 12) & 0xf;
	if (value < min || value > max)
		return -EINVAL;
	mutex_lock(&chip->mutex);
	changed = value != (ctl->private_value & 0xf);
	if (changed) {
		ctl->private_value = (ctl->private_value & ~0xf) | value;
		wm8776_field_set_from_ctl(ctl);
	}
	mutex_unlock(&chip->mutex);
	return changed;
}

static int wm8776_field_enum_get(struct snd_kcontrol *ctl,
				 struct snd_ctl_elem_value *value)
{
	value->value.enumerated.item[0] = ctl->private_value & 0xf;
	return 0;
}

static int wm8776_field_volume_get(struct snd_kcontrol *ctl,
				   struct snd_ctl_elem_value *value)
{
	value->value.integer.value[0] = ctl->private_value & 0xf;
	return 0;
}

static int wm8776_field_enum_put(struct snd_kcontrol *ctl,
				 struct snd_ctl_elem_value *value)
{
	return wm8776_field_set(ctl, value->value.enumerated.item[0]);
}

static int wm8776_field_volume_put(struct snd_kcontrol *ctl,
				   struct snd_ctl_elem_value *value)
{
	return wm8776_field_set(ctl, value->value.integer.value[0]);
}

static int wm8776_hp_vol_info(struct snd_kcontrol *ctl,
			      struct snd_ctl_elem_info *info)
{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 2;
	info->value.integer.min = 0x79 - 60;
	info->value.integer.max = 0x7f;
	return 0;
}

static int wm8776_hp_vol_get(struct snd_kcontrol *ctl,
			     struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;

	mutex_lock(&chip->mutex);
	value->value.integer.value[0] =
		data->wm8776_regs[WM8776_HPLVOL] & WM8776_HPATT_MASK;
	value->value.integer.value[1] =
		data->wm8776_regs[WM8776_HPRVOL] & WM8776_HPATT_MASK;
	mutex_unlock(&chip->mutex);
	return 0;
}

static int wm8776_hp_vol_put(struct snd_kcontrol *ctl,
			     struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	u8 to_update;

	mutex_lock(&chip->mutex);
	to_update = (value->value.integer.value[0] !=
		     (data->wm8776_regs[WM8776_HPLVOL] & WM8776_HPATT_MASK))
		<< 0;
	to_update |= (value->value.integer.value[1] !=
		      (data->wm8776_regs[WM8776_HPRVOL] & WM8776_HPATT_MASK))
		<< 1;
	if (value->value.integer.value[0] == value->value.integer.value[1]) {
		if (to_update) {
			wm8776_write(chip, WM8776_HPMASTER,
				     value->value.integer.value[0] |
				     WM8776_HPZCEN | WM8776_UPDATE);
			data->wm8776_regs[WM8776_HPLVOL] =
				value->value.integer.value[0] | WM8776_HPZCEN;
			data->wm8776_regs[WM8776_HPRVOL] =
				value->value.integer.value[0] | WM8776_HPZCEN;
		}
	} else {
		if (to_update & 1)
			wm8776_write(chip, WM8776_HPLVOL,
				     value->value.integer.value[0] |
				     WM8776_HPZCEN |
				     ((to_update & 2) ? 0 : WM8776_UPDATE));
		if (to_update & 2)
			wm8776_write(chip, WM8776_HPRVOL,
				     value->value.integer.value[1] |
				     WM8776_HPZCEN | WM8776_UPDATE);
	}
	mutex_unlock(&chip->mutex);
	return to_update != 0;
}

static int wm8776_input_mux_get(struct snd_kcontrol *ctl,
				struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int mux_bit = ctl->private_value;

	value->value.integer.value[0] =
		!!(data->wm8776_regs[WM8776_ADCMUX] & mux_bit);
	return 0;
}

static int wm8776_input_mux_put(struct snd_kcontrol *ctl,
				struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	struct snd_kcontrol *other_ctl;
	unsigned int mux_bit = ctl->private_value;
	u16 reg;
	int changed;

	mutex_lock(&chip->mutex);
	reg = data->wm8776_regs[WM8776_ADCMUX];
	if (value->value.integer.value[0]) {
		reg |= mux_bit;
		/* line-in and mic-in are exclusive */
		mux_bit ^= 3;
		if (reg & mux_bit) {
			reg &= ~mux_bit;
			if (mux_bit == 1)
				other_ctl = data->line_adcmux_control;
			else
				other_ctl = data->mic_adcmux_control;
			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
				       &other_ctl->id);
		}
	} else
		reg &= ~mux_bit;
	changed = reg != data->wm8776_regs[WM8776_ADCMUX];
	if (changed) {
		oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
				      reg & 1 ? GPIO_DS_INPUT_ROUTE : 0,
				      GPIO_DS_INPUT_ROUTE);
		wm8776_write(chip, WM8776_ADCMUX, reg);
	}
	mutex_unlock(&chip->mutex);
	return changed;
}

static int wm8776_input_vol_info(struct snd_kcontrol *ctl,
				 struct snd_ctl_elem_info *info)
{
	info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	info->count = 2;
	info->value.integer.min = 0xa5;
	info->value.integer.max = 0xff;
	return 0;
}

static int wm8776_input_vol_get(struct snd_kcontrol *ctl,
				struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;

	mutex_lock(&chip->mutex);
	value->value.integer.value[0] =
		data->wm8776_regs[WM8776_ADCLVOL] & WM8776_AGMASK;
	value->value.integer.value[1] =
		data->wm8776_regs[WM8776_ADCRVOL] & WM8776_AGMASK;
	mutex_unlock(&chip->mutex);
	return 0;
}

static int wm8776_input_vol_put(struct snd_kcontrol *ctl,
				struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	int changed = 0;

	mutex_lock(&chip->mutex);
	changed = (value->value.integer.value[0] !=
		   (data->wm8776_regs[WM8776_ADCLVOL] & WM8776_AGMASK)) ||
		  (value->value.integer.value[1] !=
		   (data->wm8776_regs[WM8776_ADCRVOL] & WM8776_AGMASK));
	wm8776_write_cached(chip, WM8776_ADCLVOL,
			    value->value.integer.value[0] | WM8776_ZCA);
	wm8776_write_cached(chip, WM8776_ADCRVOL,
			    value->value.integer.value[1] | WM8776_ZCA);
	mutex_unlock(&chip->mutex);
	return changed;
}

static int wm8776_level_control_info(struct snd_kcontrol *ctl,
				     struct snd_ctl_elem_info *info)
{
	static const char *const names[3] = {
		"None", "Peak Limiter", "Automatic Level Control"
	};
	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = 3;
	if (info->value.enumerated.item >= 3)
		info->value.enumerated.item = 2;
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
}

static int wm8776_level_control_get(struct snd_kcontrol *ctl,
				    struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;

	if (!(data->wm8776_regs[WM8776_ALCCTRL2] & WM8776_LCEN))
		value->value.enumerated.item[0] = 0;
	else if ((data->wm8776_regs[WM8776_ALCCTRL1] & WM8776_LCSEL_MASK) ==
		 WM8776_LCSEL_LIMITER)
		value->value.enumerated.item[0] = 1;
	else
		value->value.enumerated.item[0] = 2;
	return 0;
}

static void activate_control(struct oxygen *chip,
			     struct snd_kcontrol *ctl, unsigned int mode)
{
	unsigned int access;

	if (ctl->private_value & mode)
		access = 0;
	else
		access = SNDRV_CTL_ELEM_ACCESS_INACTIVE;
	if ((ctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_INACTIVE) != access) {
		ctl->vd[0].access ^= SNDRV_CTL_ELEM_ACCESS_INACTIVE;
		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_INFO, &ctl->id);
	}
}

static int wm8776_level_control_put(struct snd_kcontrol *ctl,
				    struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int mode = 0, i;
	u16 ctrl1, ctrl2;
	int changed;

	if (value->value.enumerated.item[0] >= 3)
		return -EINVAL;
	mutex_lock(&chip->mutex);
	changed = value->value.enumerated.item[0] != ctl->private_value;
	if (changed) {
		ctl->private_value = value->value.enumerated.item[0];
		ctrl1 = data->wm8776_regs[WM8776_ALCCTRL1];
		ctrl2 = data->wm8776_regs[WM8776_ALCCTRL2];
		switch (value->value.enumerated.item[0]) {
		default:
			wm8776_write_cached(chip, WM8776_ALCCTRL2,
					    ctrl2 & ~WM8776_LCEN);
			break;
		case 1:
			wm8776_write_cached(chip, WM8776_ALCCTRL1,
					    (ctrl1 & ~WM8776_LCSEL_MASK) |
					    WM8776_LCSEL_LIMITER);
			wm8776_write_cached(chip, WM8776_ALCCTRL2,
					    ctrl2 | WM8776_LCEN);
			mode = LC_CONTROL_LIMITER;
			break;
		case 2:
			wm8776_write_cached(chip, WM8776_ALCCTRL1,
					    (ctrl1 & ~WM8776_LCSEL_MASK) |
					    WM8776_LCSEL_ALC_STEREO);
			wm8776_write_cached(chip, WM8776_ALCCTRL2,
					    ctrl2 | WM8776_LCEN);
			mode = LC_CONTROL_ALC;
			break;
		}
		for (i = 0; i < ARRAY_SIZE(data->lc_controls); ++i)
			activate_control(chip, data->lc_controls[i], mode);
	}
	mutex_unlock(&chip->mutex);
	return changed;
}

static int hpf_info(struct snd_kcontrol *ctl, struct snd_ctl_elem_info *info)
{
	static const char *const names[2] = {
		"None", "High-pass Filter"
	};

	info->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	info->count = 1;
	info->value.enumerated.items = 2;
	if (info->value.enumerated.item >= 2)
		info->value.enumerated.item = 1;
	strcpy(info->value.enumerated.name, names[info->value.enumerated.item]);
	return 0;
}

static int hpf_get(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;

	value->value.enumerated.item[0] =
		!(data->wm8776_regs[WM8776_ADCIFCTRL] & WM8776_ADCHPD);
	return 0;
}

static int hpf_put(struct snd_kcontrol *ctl, struct snd_ctl_elem_value *value)
{
	struct oxygen *chip = ctl->private_data;
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int reg;
	int changed;

	mutex_lock(&chip->mutex);
	reg = data->wm8776_regs[WM8776_ADCIFCTRL] & ~WM8776_ADCHPD;
	if (!value->value.enumerated.item[0])
		reg |= WM8776_ADCHPD;
	changed = reg != data->wm8776_regs[WM8776_ADCIFCTRL];
	if (changed)
		wm8776_write(chip, WM8776_ADCIFCTRL, reg);
	mutex_unlock(&chip->mutex);
	return changed;
}

#define WM8776_BIT_SWITCH(xname, reg, bit, invert, flags) { \
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
	.name = xname, \
	.info = snd_ctl_boolean_mono_info, \
	.get = wm8776_bit_switch_get, \
	.put = wm8776_bit_switch_put, \
	.private_value = ((reg) << 16) | (bit) | ((invert) << 24) | (flags), \
}
#define _WM8776_FIELD_CTL(xname, reg, shift, initval, min, max, mask, flags) \
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
	.name = xname, \
	.private_value = (initval) | ((min) << 8) | ((max) << 12) | \
	((mask) << 16) | ((shift) << 20) | ((reg) << 24) | (flags)
#define WM8776_FIELD_CTL_ENUM(xname, reg, shift, init, min, max, mask, flags) {\
	_WM8776_FIELD_CTL(xname " Capture Enum", \
			  reg, shift, init, min, max, mask, flags), \
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
		  SNDRV_CTL_ELEM_ACCESS_INACTIVE, \
	.info = wm8776_field_enum_info, \
	.get = wm8776_field_enum_get, \
	.put = wm8776_field_enum_put, \
}
#define WM8776_FIELD_CTL_VOLUME(a, b, c, d, e, f, g, h, tlv_p) { \
	_WM8776_FIELD_CTL(a " Capture Volume", b, c, d, e, f, g, h), \
	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE | \
		  SNDRV_CTL_ELEM_ACCESS_INACTIVE | \
		  SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
	.info = wm8776_field_volume_info, \
	.get = wm8776_field_volume_get, \
	.put = wm8776_field_volume_put, \
	.tlv = { .p = tlv_p }, \
}

static const DECLARE_TLV_DB_SCALE(wm87x6_dac_db_scale, -6000, 50, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_adc_db_scale, -2100, 50, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_hp_db_scale, -6000, 100, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_lct_db_scale, -1600, 100, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_maxgain_db_scale, 0, 400, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_ngth_db_scale, -7800, 600, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_maxatten_lim_db_scale, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(wm8776_maxatten_alc_db_scale, -2100, 400, 0);

static const struct snd_kcontrol_new ds_controls[] = {
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Headphone Playback Volume",
		.info = wm8776_hp_vol_info,
		.get = wm8776_hp_vol_get,
		.put = wm8776_hp_vol_put,
		.tlv = { .p = wm8776_hp_db_scale },
	},
	WM8776_BIT_SWITCH("Headphone Playback Switch",
			  WM8776_PWRDOWN, WM8776_HPPD, 1, 0),
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Input Capture Volume",
		.info = wm8776_input_vol_info,
		.get = wm8776_input_vol_get,
		.put = wm8776_input_vol_put,
		.tlv = { .p = wm8776_adc_db_scale },
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Line Capture Switch",
		.info = snd_ctl_boolean_mono_info,
		.get = wm8776_input_mux_get,
		.put = wm8776_input_mux_put,
		.private_value = 1 << 0,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Mic Capture Switch",
		.info = snd_ctl_boolean_mono_info,
		.get = wm8776_input_mux_get,
		.put = wm8776_input_mux_put,
		.private_value = 1 << 1,
	},
	WM8776_BIT_SWITCH("Aux", WM8776_ADCMUX, 1 << 2, 0, 0),
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "ADC Filter Capture Enum",
		.info = hpf_info,
		.get = hpf_get,
		.put = hpf_put,
	},
	{
		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
		.name = "Level Control Capture Enum",
		.info = wm8776_level_control_info,
		.get = wm8776_level_control_get,
		.put = wm8776_level_control_put,
		.private_value = 0,
	},
};
static const struct snd_kcontrol_new lc_controls[] = {
	WM8776_FIELD_CTL_VOLUME("Limiter Threshold",
				WM8776_ALCCTRL1, 0, 11, 0, 15, 0xf,
				LC_CONTROL_LIMITER, wm8776_lct_db_scale),
	WM8776_FIELD_CTL_ENUM("Limiter Attack Time",
			      WM8776_ALCCTRL3, 0, 2, 0, 10, 0xf,
			      LC_CONTROL_LIMITER),
	WM8776_FIELD_CTL_ENUM("Limiter Decay Time",
			      WM8776_ALCCTRL3, 4, 3, 0, 10, 0xf,
			      LC_CONTROL_LIMITER),
	WM8776_FIELD_CTL_ENUM("Limiter Transient Window",
			      WM8776_LIMITER, 4, 2, 0, 7, 0x7,
			      LC_CONTROL_LIMITER),
	WM8776_FIELD_CTL_VOLUME("Limiter Maximum Attenuation",
				WM8776_LIMITER, 0, 6, 3, 12, 0xf,
				LC_CONTROL_LIMITER,
				wm8776_maxatten_lim_db_scale),
	WM8776_FIELD_CTL_VOLUME("ALC Target Level",
				WM8776_ALCCTRL1, 0, 11, 0, 15, 0xf,
				LC_CONTROL_ALC, wm8776_lct_db_scale),
	WM8776_FIELD_CTL_ENUM("ALC Attack Time",
			      WM8776_ALCCTRL3, 0, 2, 0, 10, 0xf,
			      LC_CONTROL_ALC),
	WM8776_FIELD_CTL_ENUM("ALC Decay Time",
			      WM8776_ALCCTRL3, 4, 3, 0, 10, 0xf,
			      LC_CONTROL_ALC),
	WM8776_FIELD_CTL_VOLUME("ALC Maximum Gain",
				WM8776_ALCCTRL1, 4, 7, 1, 7, 0x7,
				LC_CONTROL_ALC, wm8776_maxgain_db_scale),
	WM8776_FIELD_CTL_VOLUME("ALC Maximum Attenuation",
				WM8776_LIMITER, 0, 10, 10, 15, 0xf,
				LC_CONTROL_ALC, wm8776_maxatten_alc_db_scale),
	WM8776_FIELD_CTL_ENUM("ALC Hold Time",
			      WM8776_ALCCTRL2, 0, 0, 0, 15, 0xf,
			      LC_CONTROL_ALC),
	WM8776_BIT_SWITCH("Noise Gate Capture Switch",
			  WM8776_NOISEGATE, WM8776_NGAT, 0,
			  LC_CONTROL_ALC),
	WM8776_FIELD_CTL_VOLUME("Noise Gate Threshold",
				WM8776_NOISEGATE, 2, 0, 0, 7, 0x7,
				LC_CONTROL_ALC, wm8776_ngth_db_scale),
};

static int xonar_ds_control_filter(struct snd_kcontrol_new *template)
{
	if (!strncmp(template->name, "CD Capture ", 11))
		return 1; /* no CD input */
	return 0;
}

static int xonar_ds_mixer_init(struct oxygen *chip)
{
	struct xonar_wm87x6 *data = chip->model_data;
	unsigned int i;
	struct snd_kcontrol *ctl;
	int err;

	for (i = 0; i < ARRAY_SIZE(ds_controls); ++i) {
		ctl = snd_ctl_new1(&ds_controls[i], chip);
		if (!ctl)
			return -ENOMEM;
		err = snd_ctl_add(chip->card, ctl);
		if (err < 0)
			return err;
		if (!strcmp(ctl->id.name, "Line Capture Switch"))
			data->line_adcmux_control = ctl;
		else if (!strcmp(ctl->id.name, "Mic Capture Switch"))
			data->mic_adcmux_control = ctl;
	}
	if (!data->line_adcmux_control || !data->mic_adcmux_control)
		return -ENXIO;
	BUILD_BUG_ON(ARRAY_SIZE(lc_controls) != ARRAY_SIZE(data->lc_controls));
	for (i = 0; i < ARRAY_SIZE(lc_controls); ++i) {
		ctl = snd_ctl_new1(&lc_controls[i], chip);
		if (!ctl)
			return -ENOMEM;
		err = snd_ctl_add(chip->card, ctl);
		if (err < 0)
			return err;
		data->lc_controls[i] = ctl;
	}
	return 0;
}

static const struct oxygen_model model_xonar_ds = {
	.shortname = "Xonar DS",
	.longname = "Asus Virtuoso 200",
	.chip = "AV200",
	.init = xonar_ds_init,
	.control_filter = xonar_ds_control_filter,
	.mixer_init = xonar_ds_mixer_init,
	.cleanup = xonar_ds_cleanup,
	.suspend = xonar_ds_suspend,
	.resume = xonar_ds_resume,
	.pcm_hardware_filter = wm8776_adc_hardware_filter,
	.get_i2s_mclk = oxygen_default_i2s_mclk,
	.set_dac_params = set_wm87x6_dac_params,
	.set_adc_params = set_wm8776_adc_params,
	.update_dac_volume = update_wm87x6_volume,
	.update_dac_mute = update_wm87x6_mute,
	.gpio_changed = xonar_ds_gpio_changed,
	.dac_tlv = wm87x6_dac_db_scale,
	.model_data_size = sizeof(struct xonar_wm87x6),
	.device_config = PLAYBACK_0_TO_I2S |
			 PLAYBACK_1_TO_SPDIF |
			 CAPTURE_0_FROM_I2S_1,
	.dac_channels = 8,
	.dac_volume_min = 255 - 2*60,
	.dac_volume_max = 255,
	.function_flags = OXYGEN_FUNCTION_SPI,
	.dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
};

int __devinit get_xonar_wm87x6_model(struct oxygen *chip,
				     const struct pci_device_id *id)
{
	switch (id->subdevice) {
	case 0x838e:
		chip->model = model_xonar_ds;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}