root/sound/pci/oxygen/xonar_wm87x6.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * card driver for models with WM8776/WM8766 DACs (Xonar DS/HDAV1.3 Slim)
 *
 * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
 */

/*
 * Xonar DS
 * --------
 *
 * CMI8788:
 *
 *   SPI 0 -> WM8766 (surround, center/LFE, back)
 *   SPI 1 -> WM8776 (front, input)
 *
 *   GPIO 4 <- headphone detect, 0 = plugged
 *   GPIO 6 -> route input jack to mic-in (0) or line-in (1)
 *   GPIO 7 -> enable output to front L/R speaker channels
 *   GPIO 8 -> enable output to other speaker channels and front panel headphone
 *
 * WM8776:
 *
 *   input 1 <- line
 *   input 2 <- mic
 *   input 3 <- front mic
 *   input 4 <- aux
 */

/*
 * Xonar HDAV1.3 Slim
 * ------------------
 *
 * CMI8788:
 *
 *   I²C <-> WM8776 (addr 0011010)
 *
 *   GPIO 0  -> disable HDMI output
 *   GPIO 1  -> enable HP output
 *   GPIO 6  -> firmware EEPROM I²C clock
 *   GPIO 7 <-> firmware EEPROM I²C data
 *
 *   UART <-> HDMI controller
 *
 * WM8776:
 *
 *   input 1 <- mic
 *   input 2 <- aux
 */

#include <linux/pci.h>
#include <linux/delay.h>
#include <sound/control.h>
#include <sound/core.h>
#include <sound/info.h>
#include <sound/jack.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_FRONTLR  0x0080
#define GPIO_DS_OUTPUT_ENABLE   0x0100

#define GPIO_SLIM_HDMI_DISABLE  0x0001
#define GPIO_SLIM_OUTPUT_ENABLE 0x0002
#define GPIO_SLIM_FIRMWARE_CLK  0x0040
#define GPIO_SLIM_FIRMWARE_DATA 0x0080

#define I2C_DEVICE_WM8776       0x34    /* 001101, 0, /W=0 */

#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];
        struct snd_jack *hp_jack;
        struct xonar_hdmi hdmi;
};

static void wm8776_write_spi(struct oxygen *chip,
                             unsigned int reg, unsigned int value)
{
        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);
}

static void wm8776_write_i2c(struct oxygen *chip,
                             unsigned int reg, unsigned int value)
{
        oxygen_write_i2c(chip, I2C_DEVICE_WM8776,
                         (reg << 1) | (value >> 8), value);
}

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

        if ((chip->model.function_flags & OXYGEN_FUNCTION_2WIRE_SPI_MASK) ==
            OXYGEN_FUNCTION_SPI)
                wm8776_write_spi(chip, reg, value);
        else
                wm8776_write_i2c(chip, reg, value);
        if (reg < ARRAY_SIZE(data->wm8776_regs)) {
                /* reg >= WM8776_HPLVOL is always true */
                if (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)) {
                /* reg >= WM8766_LDA1 is always true */
                if (reg <= WM8766_RDA1 ||
                    (reg >= WM8766_LDA2 && reg <= WM8766_MASTDA))
                        value &= ~WM8766_UPDATE;
                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])
                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_PHASESWAP, WM8776_PH_MASK);
        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)
{
        struct xonar_wm87x6 *data = chip->model_data;

        wm8766_write(chip, WM8766_RESET, 0);
        wm8766_write(chip, WM8766_DAC_CTRL, data->wm8766_regs[WM8766_DAC_CTRL]);
        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 wm8766_init(struct oxygen *chip)
{
        struct xonar_wm87x6 *data = chip->model_data;

        data->wm8766_regs[WM8766_DAC_CTRL] =
                WM8766_PL_LEFT_LEFT | WM8766_PL_RIGHT_RIGHT;
        wm8766_registers_init(chip);
}

static void xonar_ds_handle_hp_jack(struct oxygen *chip)
{
        struct xonar_wm87x6 *data = chip->model_data;
        bool hp_plugged;
        unsigned int reg;

        guard(mutex)(&chip->mutex);

        hp_plugged = !(oxygen_read16(chip, OXYGEN_GPIO_DATA) &
                       GPIO_DS_HP_DETECT);

        oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
                              hp_plugged ? 0 : GPIO_DS_OUTPUT_FRONTLR,
                              GPIO_DS_OUTPUT_FRONTLR);

        reg = data->wm8766_regs[WM8766_DAC_CTRL] & ~WM8766_MUTEALL;
        if (hp_plugged)
                reg |= WM8766_MUTEALL;
        wm8766_write_cached(chip, WM8766_DAC_CTRL, reg);

        snd_jack_report(data->hp_jack, hp_plugged ? SND_JACK_HEADPHONE : 0);
}

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_init(chip);

        oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL,
                          GPIO_DS_INPUT_ROUTE | GPIO_DS_OUTPUT_FRONTLR);
        oxygen_clear_bits16(chip, OXYGEN_GPIO_CONTROL,
                            GPIO_DS_HP_DETECT);
        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_jack_new(chip->card, "Headphone",
                     SND_JACK_HEADPHONE, &data->hp_jack, false, false);
        xonar_ds_handle_hp_jack(chip);

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

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

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

        wm8776_init(chip);

        oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL,
                          GPIO_SLIM_HDMI_DISABLE |
                          GPIO_SLIM_FIRMWARE_CLK |
                          GPIO_SLIM_FIRMWARE_DATA);

        xonar_hdmi_init(chip, &data->hdmi);
        xonar_enable_output(chip);

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

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

static void xonar_hdav_slim_cleanup(struct oxygen *chip)
{
        xonar_hdmi_cleanup(chip);
        xonar_disable_output(chip);
        wm8776_write(chip, WM8776_RESET, 0);
        msleep(2);
}

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

static void xonar_hdav_slim_suspend(struct oxygen *chip)
{
        xonar_hdav_slim_cleanup(chip);
}

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

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

        wm8776_registers_init(chip);
        xonar_hdmi_resume(chip, &data->hdmi);
        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 xonar_hdav_slim_hardware_filter(unsigned int channel,
                                            struct snd_pcm_hardware *hardware)
{
        wm8776_adc_hardware_filter(channel, hardware);
        xonar_hdmi_pcm_hardware_filter(channel, hardware);
}

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 set_hdav_slim_dac_params(struct oxygen *chip,
                                     struct snd_pcm_hw_params *params)
{
        struct xonar_wm87x6 *data = chip->model_data;

        xonar_set_hdmi_params(chip, &data->hdmi, params);
}

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 update_wm8766_center_lfe_mix(struct oxygen *chip, bool mixed)
{
        struct xonar_wm87x6 *data = chip->model_data;
        unsigned int reg;

        /*
         * The WM8766 can mix left and right channels, but this setting
         * applies to all three stereo pairs.
         */
        reg = data->wm8766_regs[WM8766_DAC_CTRL] &
                ~(WM8766_PL_LEFT_MASK | WM8766_PL_RIGHT_MASK);
        if (mixed)
                reg |= WM8766_PL_LEFT_LRMIX | WM8766_PL_RIGHT_LRMIX;
        else
                reg |= WM8766_PL_LEFT_LEFT | WM8766_PL_RIGHT_RIGHT;
        wm8766_write_cached(chip, WM8766_DAC_CTRL, reg);
}

static void xonar_ds_gpio_changed(struct oxygen *chip)
{
        xonar_ds_handle_hp_jack(chip);
}

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;

        guard(mutex)(&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);
        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;
        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;
        }
        return snd_ctl_enum_info(info, 1, max + 1, names);
}

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;
        guard(mutex)(&chip->mutex);
        changed = value != (ctl->private_value & 0xf);
        if (changed) {
                ctl->private_value = (ctl->private_value & ~0xf) | value;
                wm8776_field_set_from_ctl(ctl);
        }
        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;

        guard(mutex)(&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;
        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;

        guard(mutex)(&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);
        }
        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;

        guard(mutex)(&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);
        }
        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;

        guard(mutex)(&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;
        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;

        guard(mutex)(&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);
        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"
        };

        return snd_ctl_enum_info(info, 1, 3, names);
}

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;
        guard(mutex)(&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);
        }
        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"
        };

        return snd_ctl_enum_info(info, 1, 2, names);
}

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;

        guard(mutex)(&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);
        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("Front Mic Capture Switch",
                          WM8776_ADCMUX, 1 << 2, 0, 0),
        WM8776_BIT_SWITCH("Aux Capture Switch",
                          WM8776_ADCMUX, 1 << 3, 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 hdav_slim_controls[] = {
        {
                .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
                .name = "HDMI Playback Switch",
                .info = snd_ctl_boolean_mono_info,
                .get = xonar_gpio_bit_switch_get,
                .put = xonar_gpio_bit_switch_put,
                .private_value = GPIO_SLIM_HDMI_DISABLE | XONAR_GPIO_BIT_INVERT,
        },
        {
                .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 },
        },
        WM8776_BIT_SWITCH("Mic Capture Switch",
                          WM8776_ADCMUX, 1 << 0, 0, 0),
        WM8776_BIT_SWITCH("Aux Capture Switch",
                          WM8776_ADCMUX, 1 << 1, 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 add_lc_controls(struct oxygen *chip)
{
        struct xonar_wm87x6 *data = chip->model_data;
        unsigned int i;
        struct snd_kcontrol *ctl;
        int err;

        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 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;

        return add_lc_controls(chip);
}

static int xonar_hdav_slim_mixer_init(struct oxygen *chip)
{
        unsigned int i;
        struct snd_kcontrol *ctl;
        int err;

        for (i = 0; i < ARRAY_SIZE(hdav_slim_controls); ++i) {
                ctl = snd_ctl_new1(&hdav_slim_controls[i], chip);
                if (!ctl)
                        return -ENOMEM;
                err = snd_ctl_add(chip->card, ctl);
                if (err < 0)
                        return err;
        }

        return add_lc_controls(chip);
}

static void dump_wm8776_registers(struct oxygen *chip,
                                  struct snd_info_buffer *buffer)
{
        struct xonar_wm87x6 *data = chip->model_data;
        unsigned int i;

        snd_iprintf(buffer, "\nWM8776:\n00:");
        for (i = 0; i < 0x10; ++i)
                snd_iprintf(buffer, " %03x", data->wm8776_regs[i]);
        snd_iprintf(buffer, "\n10:");
        for (i = 0x10; i < 0x17; ++i)
                snd_iprintf(buffer, " %03x", data->wm8776_regs[i]);
        snd_iprintf(buffer, "\n");
}

static void dump_wm87x6_registers(struct oxygen *chip,
                                  struct snd_info_buffer *buffer)
{
        struct xonar_wm87x6 *data = chip->model_data;
        unsigned int i;

        dump_wm8776_registers(chip, buffer);
        snd_iprintf(buffer, "\nWM8766:\n00:");
        for (i = 0; i < 0x10; ++i)
                snd_iprintf(buffer, " %03x", data->wm8766_regs[i]);
        snd_iprintf(buffer, "\n");
}

static const struct oxygen_model model_xonar_ds = {
        .longname = "Asus Virtuoso 66",
        .chip = "AV200",
        .init = xonar_ds_init,
        .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,
        .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,
        .update_center_lfe_mix = update_wm8766_center_lfe_mix,
        .gpio_changed = xonar_ds_gpio_changed,
        .dump_registers = dump_wm87x6_registers,
        .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 |
                         CAPTURE_1_FROM_SPDIF,
        .dac_channels_pcm = 8,
        .dac_channels_mixer = 8,
        .dac_volume_min = 255 - 2*60,
        .dac_volume_max = 255,
        .function_flags = OXYGEN_FUNCTION_SPI,
        .dac_mclks = OXYGEN_MCLKS(256, 256, 128),
        .adc_mclks = OXYGEN_MCLKS(256, 256, 128),
        .dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
        .adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
};

static const struct oxygen_model model_xonar_hdav_slim = {
        .shortname = "Xonar HDAV1.3 Slim",
        .longname = "Asus Virtuoso 200",
        .chip = "AV200",
        .init = xonar_hdav_slim_init,
        .mixer_init = xonar_hdav_slim_mixer_init,
        .cleanup = xonar_hdav_slim_cleanup,
        .suspend = xonar_hdav_slim_suspend,
        .resume = xonar_hdav_slim_resume,
        .pcm_hardware_filter = xonar_hdav_slim_hardware_filter,
        .set_dac_params = set_hdav_slim_dac_params,
        .set_adc_params = set_wm8776_adc_params,
        .update_dac_volume = update_wm8776_volume,
        .update_dac_mute = update_wm8776_mute,
        .uart_input = xonar_hdmi_uart_input,
        .dump_registers = dump_wm8776_registers,
        .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 |
                         CAPTURE_1_FROM_SPDIF,
        .dac_channels_pcm = 8,
        .dac_channels_mixer = 2,
        .dac_volume_min = 255 - 2*60,
        .dac_volume_max = 255,
        .function_flags = OXYGEN_FUNCTION_2WIRE,
        .dac_mclks = OXYGEN_MCLKS(256, 256, 128),
        .adc_mclks = OXYGEN_MCLKS(256, 256, 128),
        .dac_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
        .adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
};

int get_xonar_wm87x6_model(struct oxygen *chip,
                           const struct pci_device_id *id)
{
        switch (id->subdevice) {
        case 0x838e:
                chip->model = model_xonar_ds;
                chip->model.shortname = "Xonar DS";
                break;
        case 0x8522:
                chip->model = model_xonar_ds;
                chip->model.shortname = "Xonar DSX";
                break;
        case 0x835e:
                chip->model = model_xonar_hdav_slim;
                break;
        default:
                return -EINVAL;
        }
        return 0;
}