/*
   * card driver for models with PCM1796 DACs (Xonar D2/D2X/HDAV1.3/ST/STX)
   *
   * 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 D2/D2X
   * ------------
   *
   * CMI8788:
   *

   *   SPI 0 -> 1st PCM1796 (front)
   *   SPI 1 -> 2nd PCM1796 (surround)
   *   SPI 2 -> 3rd PCM1796 (center/LFE)
   *   SPI 4 -> 4th PCM1796 (back)

   *

   *   GPIO 2 -> M0 of CS5381
   *   GPIO 3 -> M1 of CS5381
   *   GPIO 5 <- external power present (D2X only)
   *   GPIO 7 -> ALT
   *   GPIO 8 -> enable output to speakers

   *
   * CM9780:
   *

   *   LINE_OUT -> input of ADC
   *
   *   AUX_IN   <- aux
   *   VIDEO_IN <- CD
   *   FMIC_IN  <- mic
   *
   *   GPO 0 -> route line-in (0) or AC97 output (1) to CS5381 input

   */
  
  /*
   * Xonar HDAV1.3 (Deluxe)
   * ----------------------
   *
   * CMI8788:
   *

   *   I²C <-> PCM1796 (addr 1001100) (front)

   *

   *   GPI 0 <- external power present

   *

   *   GPIO 0 -> enable HDMI (0) or speaker (1) output
   *   GPIO 2 -> M0 of CS5381
   *   GPIO 3 -> M1 of CS5381
   *   GPIO 4 <- daughterboard detection
   *   GPIO 5 <- daughterboard detection
   *   GPIO 6 -> ?
   *   GPIO 7 -> ?
   *   GPIO 8 -> route input jack to line-in (0) or mic-in (1)

   *

   *   UART <-> HDMI controller

   *

   * CM9780:
   *

   *   LINE_OUT -> input of ADC
   *
   *   AUX_IN <- aux
   *   CD_IN  <- CD
   *   MIC_IN <- mic
   *
   *   GPO 0 -> route line-in (0) or AC97 output (1) to CS5381 input

   *

   * no daughterboard
   * ----------------
   *

   *   GPIO 4 <- 1

   *
   * H6 daughterboard
   * ----------------
   *

   *   GPIO 4 <- 0
   *   GPIO 5 <- 0

   *

   *   I²C <-> PCM1796 (addr 1001101) (surround)
   *       <-> PCM1796 (addr 1001110) (center/LFE)
   *       <-> PCM1796 (addr 1001111) (back)

   *
   * unknown daughterboard
   * ---------------------
   *

   *   GPIO 4 <- 0
   *   GPIO 5 <- 1

   *

   *   I²C <-> CS4362A (addr 0011000) (surround, center/LFE, back)

   */
  
  /*
   * Xonar Essence ST (Deluxe)/STX
   * -----------------------------
   *
   * CMI8788:
   *

   *   I²C <-> PCM1792A (addr 1001100)
   *       <-> CS2000 (addr 1001110) (ST only)

   *

   *   ADC1 MCLK -> REF_CLK of CS2000 (ST only)

   *

   *   GPI 0 <- external power present (STX only)

   *

   *   GPIO 0 -> enable output to speakers
   *   GPIO 1 -> route HP to front panel (0) or rear jack (1)
   *   GPIO 2 -> M0 of CS5381
   *   GPIO 3 -> M1 of CS5381
   *   GPIO 4 <- daughterboard detection
   *   GPIO 5 <- daughterboard detection
   *   GPIO 6 -> ?
   *   GPIO 7 -> route output to speaker jacks (0) or HP (1)
   *   GPIO 8 -> route input jack to line-in (0) or mic-in (1)

   *
   * PCM1792A:
   *

   *   SCK <- CLK_OUT of CS2000 (ST only)

   *

   * CM9780:

   *

   *   LINE_OUT -> input of ADC

   *

   *   AUX_IN <- aux
   *   MIC_IN <- mic

   *

   *   GPO 0 -> route line-in (0) or AC97 output (1) to CS5381 input

   *
   * H6 daughterboard
   * ----------------
   *
   * GPIO 4 <- 0
   * GPIO 5 <- 0
   */

  /*

   * Xonar Xense
   * -----------

   *
   * CMI8788:
   *

   *   I²C <-> PCM1796 (addr 1001100) (front)
   *       <-> CS4362A (addr 0011000) (surround, center/LFE, back)
   *       <-> CS2000 (addr 1001110)
   *
   *   ADC1 MCLK -> REF_CLK of CS2000
   *
   *   GPI 0 <- external power present
   *
   *   GPIO 0 -> enable output
   *   GPIO 1 -> route HP to front panel (0) or rear jack (1)
   *   GPIO 2 -> M0 of CS5381
   *   GPIO 3 -> M1 of CS5381
   *   GPIO 4 -> enable output
   *   GPIO 5 -> enable output
   *   GPIO 6 -> ?
   *   GPIO 7 -> route output to HP (0) or speaker (1)
   *   GPIO 8 -> route input jack to mic-in (0) or line-in (1)
   *
   * CM9780:
   *
   *   LINE_OUT -> input of ADC
   *
   *   AUX_IN   <- aux
   *   VIDEO_IN <- ?
   *   FMIC_IN  <- mic

   *

   *   GPO 0 -> route line-in (0) or AC97 output (1) to CS5381 input
   *   GPO 1 -> route mic-in from input jack (0) or front panel header (1)

   */

  #include <linux/pci.h>
  #include <linux/delay.h>
  #include <linux/mutex.h>
  #include <sound/ac97_codec.h>
  #include <sound/control.h>
  #include <sound/core.h>

  #include <sound/info.h>

  #include <sound/pcm.h>
  #include <sound/pcm_params.h>
  #include <sound/tlv.h>
  #include "xonar.h"
  #include "cm9780.h"
  #include "pcm1796.h"

  #include "cs2000.h"

  
  
  #define GPIO_D2X_EXT_POWER	0x0020
  #define GPIO_D2_ALT		0x0080
  #define GPIO_D2_OUTPUT_ENABLE	0x0100
  
  #define GPI_EXT_POWER		0x01
  #define GPIO_INPUT_ROUTE	0x0100
  
  #define GPIO_HDAV_OUTPUT_ENABLE	0x0001

  #define GPIO_HDAV_MAGIC		0x00c0

  
  #define GPIO_DB_MASK		0x0030
  #define GPIO_DB_H6		0x0000
  
  #define GPIO_ST_OUTPUT_ENABLE	0x0001
  #define GPIO_ST_HP_REAR		0x0002

  #define GPIO_ST_MAGIC		0x0040

  #define GPIO_ST_HP		0x0080
  
  #define I2C_DEVICE_PCM1796(i)	(0x98 + ((i) << 1))	/* 10011, ii, /W=0 */

  #define I2C_DEVICE_CS2000	0x9c			/* 100111, 0, /W=0 */

  #define PCM1796_REG_BASE	16

  
  struct xonar_pcm179x {
  	struct xonar_generic generic;
  	unsigned int dacs;

  	u8 pcm1796_regs[4][5];

  	unsigned int current_rate;

  	bool h6;

  	bool hp_active;
  	s8 hp_gain_offset;

  	bool has_cs2000;

  	u8 cs2000_regs[0x1f];

  	bool broken_i2c;

  };
  
  struct xonar_hdav {
  	struct xonar_pcm179x pcm179x;
  	struct xonar_hdmi hdmi;
  };
  
  
  static inline void pcm1796_write_spi(struct oxygen *chip, unsigned int codec,
  				     u8 reg, u8 value)
  {
  	/* maps ALSA channel pair number to SPI output */
  	static const u8 codec_map[4] = {
  		0, 1, 2, 4
  	};
  	oxygen_write_spi(chip, OXYGEN_SPI_TRIGGER  |
  			 OXYGEN_SPI_DATA_LENGTH_2 |
  			 OXYGEN_SPI_CLOCK_160 |
  			 (codec_map[codec] << OXYGEN_SPI_CODEC_SHIFT) |
  			 OXYGEN_SPI_CEN_LATCH_CLOCK_HI,
  			 (reg << 8) | value);
  }
  
  static inline void pcm1796_write_i2c(struct oxygen *chip, unsigned int codec,
  				     u8 reg, u8 value)
  {
  	oxygen_write_i2c(chip, I2C_DEVICE_PCM1796(codec), reg, value);
  }
  
  static void pcm1796_write(struct oxygen *chip, unsigned int codec,
  			  u8 reg, u8 value)
  {

  	struct xonar_pcm179x *data = chip->model_data;

  	if ((chip->model.function_flags & OXYGEN_FUNCTION_2WIRE_SPI_MASK) ==
  	    OXYGEN_FUNCTION_SPI)
  		pcm1796_write_spi(chip, codec, reg, value);
  	else
  		pcm1796_write_i2c(chip, codec, reg, value);

  	if ((unsigned int)(reg - PCM1796_REG_BASE)
  	    < ARRAY_SIZE(data->pcm1796_regs[codec]))
  		data->pcm1796_regs[codec][reg - PCM1796_REG_BASE] = value;

  }

  static void pcm1796_write_cached(struct oxygen *chip, unsigned int codec,
  				 u8 reg, u8 value)

  {

  	struct xonar_pcm179x *data = chip->model_data;
  
  	if (value != data->pcm1796_regs[codec][reg - PCM1796_REG_BASE])
  		pcm1796_write(chip, codec, reg, value);

  }

  static void cs2000_write(struct oxygen *chip, u8 reg, u8 value)

  {
  	struct xonar_pcm179x *data = chip->model_data;

  	oxygen_write_i2c(chip, I2C_DEVICE_CS2000, reg, value);

  	data->cs2000_regs[reg] = value;

  }

  static void cs2000_write_cached(struct oxygen *chip, u8 reg, u8 value)

  {
  	struct xonar_pcm179x *data = chip->model_data;

  	if (value != data->cs2000_regs[reg])

  		cs2000_write(chip, reg, value);

  }

  static void pcm1796_registers_init(struct oxygen *chip)

  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;

  	s8 gain_offset;

  	msleep(1);

  	gain_offset = data->hp_active ? data->hp_gain_offset : 0;

  	for (i = 0; i < data->dacs; ++i) {

  		/* set ATLD before ATL/ATR */
  		pcm1796_write(chip, i, 18,
  			      data->pcm1796_regs[0][18 - PCM1796_REG_BASE]);

  		pcm1796_write(chip, i, 16, chip->dac_volume[i * 2]
  			      + gain_offset);
  		pcm1796_write(chip, i, 17, chip->dac_volume[i * 2 + 1]
  			      + gain_offset);

  		pcm1796_write(chip, i, 19,
  			      data->pcm1796_regs[0][19 - PCM1796_REG_BASE]);

  		pcm1796_write(chip, i, 20,
  			      data->pcm1796_regs[0][20 - PCM1796_REG_BASE]);

  		pcm1796_write(chip, i, 21, 0);

  		gain_offset = 0;

  	}

  }
  
  static void pcm1796_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;

  	data->pcm1796_regs[0][18 - PCM1796_REG_BASE] =

  		PCM1796_DMF_DISABLED | PCM1796_FMT_24_I2S | PCM1796_ATLD;

  	if (!data->broken_i2c)
  		data->pcm1796_regs[0][18 - PCM1796_REG_BASE] |= PCM1796_MUTE;

  	data->pcm1796_regs[0][19 - PCM1796_REG_BASE] =
  		PCM1796_FLT_SHARP | PCM1796_ATS_1;

  	data->pcm1796_regs[0][20 - PCM1796_REG_BASE] =
  		data->h6 ? PCM1796_OS_64 : PCM1796_OS_128;

  	pcm1796_registers_init(chip);

  	data->current_rate = 48000;

  }
  
  static void xonar_d2_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  
  	data->generic.anti_pop_delay = 300;
  	data->generic.output_enable_bit = GPIO_D2_OUTPUT_ENABLE;
  	data->dacs = 4;

  
  	pcm1796_init(chip);
  
  	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_D2_ALT);
  	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, GPIO_D2_ALT);
  
  	oxygen_ac97_set_bits(chip, 0, CM9780_JACK, CM9780_FMIC2MIC);
  
  	xonar_init_cs53x1(chip);
  	xonar_enable_output(chip);
  
  	snd_component_add(chip->card, "PCM1796");
  	snd_component_add(chip->card, "CS5381");
  }
  
  static void xonar_d2x_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  
  	data->generic.ext_power_reg = OXYGEN_GPIO_DATA;
  	data->generic.ext_power_int_reg = OXYGEN_GPIO_INTERRUPT_MASK;
  	data->generic.ext_power_bit = GPIO_D2X_EXT_POWER;
  	oxygen_clear_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_D2X_EXT_POWER);
  	xonar_init_ext_power(chip);
  	xonar_d2_init(chip);
  }
  
  static void xonar_hdav_init(struct oxygen *chip)
  {
  	struct xonar_hdav *data = chip->model_data;
  
  	oxygen_write16(chip, OXYGEN_2WIRE_BUS_STATUS,
  		       OXYGEN_2WIRE_LENGTH_8 |
  		       OXYGEN_2WIRE_INTERRUPT_MASK |

  		       OXYGEN_2WIRE_SPEED_STANDARD);

  
  	data->pcm179x.generic.anti_pop_delay = 100;
  	data->pcm179x.generic.output_enable_bit = GPIO_HDAV_OUTPUT_ENABLE;
  	data->pcm179x.generic.ext_power_reg = OXYGEN_GPI_DATA;
  	data->pcm179x.generic.ext_power_int_reg = OXYGEN_GPI_INTERRUPT_MASK;
  	data->pcm179x.generic.ext_power_bit = GPI_EXT_POWER;

  	data->pcm179x.dacs = chip->model.dac_channels_mixer / 2;

  	data->pcm179x.h6 = chip->model.dac_channels_mixer > 2;

  
  	pcm1796_init(chip);

  	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL,
  			  GPIO_HDAV_MAGIC | GPIO_INPUT_ROUTE);

  	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA, GPIO_INPUT_ROUTE);
  
  	xonar_init_cs53x1(chip);
  	xonar_init_ext_power(chip);
  	xonar_hdmi_init(chip, &data->hdmi);
  	xonar_enable_output(chip);
  
  	snd_component_add(chip->card, "PCM1796");
  	snd_component_add(chip->card, "CS5381");
  }

  static void xonar_st_init_i2c(struct oxygen *chip)

  {

  	oxygen_write16(chip, OXYGEN_2WIRE_BUS_STATUS,
  		       OXYGEN_2WIRE_LENGTH_8 |
  		       OXYGEN_2WIRE_INTERRUPT_MASK |

  		       OXYGEN_2WIRE_SPEED_STANDARD);

  }
  
  static void xonar_st_init_common(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;

  	data->generic.output_enable_bit = GPIO_ST_OUTPUT_ENABLE;

  	data->dacs = chip->model.dac_channels_mixer / 2;

  	data->hp_gain_offset = 2*-18;

  
  	pcm1796_init(chip);
  
  	oxygen_set_bits16(chip, OXYGEN_GPIO_CONTROL,

  			  GPIO_INPUT_ROUTE | GPIO_ST_HP_REAR |
  			  GPIO_ST_MAGIC | GPIO_ST_HP);

  	oxygen_clear_bits16(chip, OXYGEN_GPIO_DATA,
  			    GPIO_INPUT_ROUTE | GPIO_ST_HP_REAR | GPIO_ST_HP);
  
  	xonar_init_cs53x1(chip);
  	xonar_enable_output(chip);
  
  	snd_component_add(chip->card, "PCM1792A");
  	snd_component_add(chip->card, "CS5381");
  }

  static void cs2000_registers_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  
  	cs2000_write(chip, CS2000_GLOBAL_CFG, CS2000_FREEZE);
  	cs2000_write(chip, CS2000_DEV_CTRL, 0);
  	cs2000_write(chip, CS2000_DEV_CFG_1,
  		     CS2000_R_MOD_SEL_1 |
  		     (0 << CS2000_R_SEL_SHIFT) |
  		     CS2000_AUX_OUT_SRC_REF_CLK |
  		     CS2000_EN_DEV_CFG_1);
  	cs2000_write(chip, CS2000_DEV_CFG_2,
  		     (0 << CS2000_LOCK_CLK_SHIFT) |
  		     CS2000_FRAC_N_SRC_STATIC);
  	cs2000_write(chip, CS2000_RATIO_0 + 0, 0x00); /* 1.0 */
  	cs2000_write(chip, CS2000_RATIO_0 + 1, 0x10);
  	cs2000_write(chip, CS2000_RATIO_0 + 2, 0x00);
  	cs2000_write(chip, CS2000_RATIO_0 + 3, 0x00);

  	cs2000_write(chip, CS2000_FUN_CFG_1,
  		     data->cs2000_regs[CS2000_FUN_CFG_1]);

  	cs2000_write(chip, CS2000_FUN_CFG_2, 0);
  	cs2000_write(chip, CS2000_GLOBAL_CFG, CS2000_EN_DEV_CFG_2);

  	msleep(3); /* PLL lock delay */

  }
  
  static void xonar_st_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;

  	data->generic.anti_pop_delay = 100;

  	data->h6 = chip->model.dac_channels_mixer > 2;

  	data->has_cs2000 = 1;

  	data->cs2000_regs[CS2000_FUN_CFG_1] = CS2000_REF_CLK_DIV_1;

  	data->broken_i2c = true;

  
  	oxygen_write16(chip, OXYGEN_I2S_A_FORMAT,

  		       OXYGEN_RATE_48000 |
  		       OXYGEN_I2S_FORMAT_I2S |

  		       OXYGEN_I2S_MCLK(data->h6 ? MCLK_256 : MCLK_512) |

  		       OXYGEN_I2S_BITS_16 |
  		       OXYGEN_I2S_MASTER |
  		       OXYGEN_I2S_BCLK_64);

  
  	xonar_st_init_i2c(chip);
  	cs2000_registers_init(chip);
  	xonar_st_init_common(chip);
  
  	snd_component_add(chip->card, "CS2000");
  }

  static void xonar_stx_init(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;

  	xonar_st_init_i2c(chip);

  	data->generic.anti_pop_delay = 800;

  	data->generic.ext_power_reg = OXYGEN_GPI_DATA;
  	data->generic.ext_power_int_reg = OXYGEN_GPI_INTERRUPT_MASK;
  	data->generic.ext_power_bit = GPI_EXT_POWER;
  	xonar_init_ext_power(chip);

  	xonar_st_init_common(chip);

  }
  
  static void xonar_d2_cleanup(struct oxygen *chip)
  {
  	xonar_disable_output(chip);
  }
  
  static void xonar_hdav_cleanup(struct oxygen *chip)
  {
  	xonar_hdmi_cleanup(chip);
  	xonar_disable_output(chip);
  	msleep(2);
  }
  
  static void xonar_st_cleanup(struct oxygen *chip)
  {
  	xonar_disable_output(chip);
  }
  
  static void xonar_d2_suspend(struct oxygen *chip)
  {
  	xonar_d2_cleanup(chip);
  }
  
  static void xonar_hdav_suspend(struct oxygen *chip)
  {
  	xonar_hdav_cleanup(chip);
  }
  
  static void xonar_st_suspend(struct oxygen *chip)
  {
  	xonar_st_cleanup(chip);
  }
  
  static void xonar_d2_resume(struct oxygen *chip)
  {

  	pcm1796_registers_init(chip);

  	xonar_enable_output(chip);
  }
  
  static void xonar_hdav_resume(struct oxygen *chip)
  {
  	struct xonar_hdav *data = chip->model_data;

  	pcm1796_registers_init(chip);

  	xonar_hdmi_resume(chip, &data->hdmi);
  	xonar_enable_output(chip);
  }

  static void xonar_stx_resume(struct oxygen *chip)

  {

  	pcm1796_registers_init(chip);

  	xonar_enable_output(chip);
  }

  static void xonar_st_resume(struct oxygen *chip)
  {
  	cs2000_registers_init(chip);
  	xonar_stx_resume(chip);
  }

  static void update_pcm1796_oversampling(struct oxygen *chip)

  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;

  	u8 reg;

  	if (data->current_rate <= 48000 && !data->h6)

  		reg = PCM1796_OS_128;

  	else

  		reg = PCM1796_OS_64;

  	for (i = 0; i < data->dacs; ++i)
  		pcm1796_write_cached(chip, i, 20, reg);
  }

  static void set_pcm1796_params(struct oxygen *chip,
  			       struct snd_pcm_hw_params *params)
  {
  	struct xonar_pcm179x *data = chip->model_data;

  	msleep(1);

  	data->current_rate = params_rate(params);
  	update_pcm1796_oversampling(chip);
  }

  static void update_pcm1796_volume(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;

  	s8 gain_offset;

  	gain_offset = data->hp_active ? data->hp_gain_offset : 0;

  	for (i = 0; i < data->dacs; ++i) {

  		pcm1796_write_cached(chip, i, 16, chip->dac_volume[i * 2]
  				     + gain_offset);
  		pcm1796_write_cached(chip, i, 17, chip->dac_volume[i * 2 + 1]
  				     + gain_offset);

  		gain_offset = 0;

  	}
  }
  
  static void update_pcm1796_mute(struct oxygen *chip)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;
  	u8 value;

  	value = PCM1796_DMF_DISABLED | PCM1796_FMT_24_I2S | PCM1796_ATLD;

  	if (chip->dac_mute)
  		value |= PCM1796_MUTE;

  	for (i = 0; i < data->dacs; ++i)

  		pcm1796_write_cached(chip, i, 18, value);

  }

  static void update_cs2000_rate(struct oxygen *chip, unsigned int rate)

  {

  	struct xonar_pcm179x *data = chip->model_data;

  	u8 rate_mclk, reg;

  	switch (rate) {

  	case 32000:

  	case 64000:

  		rate_mclk = OXYGEN_RATE_32000;

  		break;

  	case 44100:

  	case 88200:

  	case 176400:

  		rate_mclk = OXYGEN_RATE_44100;

  		break;

  	default:
  	case 48000:
  	case 96000:

  	case 192000:

  		rate_mclk = OXYGEN_RATE_48000;

  		break;
  	}

  
  	if (rate <= 96000 && (rate > 48000 || data->h6)) {
  		rate_mclk |= OXYGEN_I2S_MCLK(MCLK_256);

  		reg = CS2000_REF_CLK_DIV_1;

  	} else {
  		rate_mclk |= OXYGEN_I2S_MCLK(MCLK_512);

  		reg = CS2000_REF_CLK_DIV_2;

  	}
  
  	oxygen_write16_masked(chip, OXYGEN_I2S_A_FORMAT, rate_mclk,
  			      OXYGEN_I2S_RATE_MASK | OXYGEN_I2S_MCLK_MASK);

  	cs2000_write_cached(chip, CS2000_FUN_CFG_1, reg);

  	msleep(3); /* PLL lock delay */

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

  	update_cs2000_rate(chip, params_rate(params));

  	set_pcm1796_params(chip, params);
  }

  static void set_hdav_params(struct oxygen *chip,
  			    struct snd_pcm_hw_params *params)
  {
  	struct xonar_hdav *data = chip->model_data;
  
  	set_pcm1796_params(chip, params);
  	xonar_set_hdmi_params(chip, &data->hdmi, params);
  }
  
  static const struct snd_kcontrol_new alt_switch = {
  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	.name = "Analog Loopback Switch",
  	.info = snd_ctl_boolean_mono_info,
  	.get = xonar_gpio_bit_switch_get,
  	.put = xonar_gpio_bit_switch_put,
  	.private_value = GPIO_D2_ALT,
  };

  static int rolloff_info(struct snd_kcontrol *ctl,
  			struct snd_ctl_elem_info *info)
  {
  	static const char *const names[2] = {
  		"Sharp Roll-off", "Slow Roll-off"
  	};

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

  }
  
  static int rolloff_get(struct snd_kcontrol *ctl,
  		       struct snd_ctl_elem_value *value)
  {
  	struct oxygen *chip = ctl->private_data;
  	struct xonar_pcm179x *data = chip->model_data;
  
  	value->value.enumerated.item[0] =
  		(data->pcm1796_regs[0][19 - PCM1796_REG_BASE] &
  		 PCM1796_FLT_MASK) != PCM1796_FLT_SHARP;
  	return 0;
  }
  
  static int rolloff_put(struct snd_kcontrol *ctl,
  		       struct snd_ctl_elem_value *value)
  {
  	struct oxygen *chip = ctl->private_data;
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;
  	int changed;
  	u8 reg;
  
  	mutex_lock(&chip->mutex);
  	reg = data->pcm1796_regs[0][19 - PCM1796_REG_BASE];
  	reg &= ~PCM1796_FLT_MASK;
  	if (!value->value.enumerated.item[0])
  		reg |= PCM1796_FLT_SHARP;
  	else
  		reg |= PCM1796_FLT_SLOW;
  	changed = reg != data->pcm1796_regs[0][19 - PCM1796_REG_BASE];
  	if (changed) {
  		for (i = 0; i < data->dacs; ++i)
  			pcm1796_write(chip, i, 19, reg);
  	}
  	mutex_unlock(&chip->mutex);
  	return changed;
  }
  
  static const struct snd_kcontrol_new rolloff_control = {
  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	.name = "DAC Filter Playback Enum",
  	.info = rolloff_info,
  	.get = rolloff_get,
  	.put = rolloff_put,
  };

  static const struct snd_kcontrol_new hdav_hdmi_control = {
  	.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_HDAV_OUTPUT_ENABLE | XONAR_GPIO_BIT_INVERT,
  };

  static int st_output_switch_info(struct snd_kcontrol *ctl,
  				 struct snd_ctl_elem_info *info)
  {
  	static const char *const names[3] = {
  		"Speakers", "Headphones", "FP Headphones"
  	};

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

  }
  
  static int st_output_switch_get(struct snd_kcontrol *ctl,
  				struct snd_ctl_elem_value *value)
  {
  	struct oxygen *chip = ctl->private_data;
  	u16 gpio;
  
  	gpio = oxygen_read16(chip, OXYGEN_GPIO_DATA);
  	if (!(gpio & GPIO_ST_HP))
  		value->value.enumerated.item[0] = 0;
  	else if (gpio & GPIO_ST_HP_REAR)
  		value->value.enumerated.item[0] = 1;
  	else
  		value->value.enumerated.item[0] = 2;
  	return 0;
  }
  
  
  static int st_output_switch_put(struct snd_kcontrol *ctl,
  				struct snd_ctl_elem_value *value)
  {
  	struct oxygen *chip = ctl->private_data;

  	struct xonar_pcm179x *data = chip->model_data;

  	u16 gpio_old, gpio;
  
  	mutex_lock(&chip->mutex);
  	gpio_old = oxygen_read16(chip, OXYGEN_GPIO_DATA);
  	gpio = gpio_old;
  	switch (value->value.enumerated.item[0]) {
  	case 0:
  		gpio &= ~(GPIO_ST_HP | GPIO_ST_HP_REAR);
  		break;
  	case 1:
  		gpio |= GPIO_ST_HP | GPIO_ST_HP_REAR;
  		break;
  	case 2:
  		gpio = (gpio | GPIO_ST_HP) & ~GPIO_ST_HP_REAR;
  		break;
  	}
  	oxygen_write16(chip, OXYGEN_GPIO_DATA, gpio);

  	data->hp_active = gpio & GPIO_ST_HP;
  	update_pcm1796_volume(chip);

  	mutex_unlock(&chip->mutex);
  	return gpio != gpio_old;
  }

  static int st_hp_volume_offset_info(struct snd_kcontrol *ctl,
  				    struct snd_ctl_elem_info *info)
  {
  	static const char *const names[3] = {
  		"< 64 ohms", "64-300 ohms", "300-600 ohms"
  	};

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

  }
  
  static int st_hp_volume_offset_get(struct snd_kcontrol *ctl,
  				   struct snd_ctl_elem_value *value)
  {
  	struct oxygen *chip = ctl->private_data;
  	struct xonar_pcm179x *data = chip->model_data;
  
  	mutex_lock(&chip->mutex);
  	if (data->hp_gain_offset < 2*-6)
  		value->value.enumerated.item[0] = 0;
  	else if (data->hp_gain_offset < 0)
  		value->value.enumerated.item[0] = 1;
  	else
  		value->value.enumerated.item[0] = 2;
  	mutex_unlock(&chip->mutex);
  	return 0;
  }
  
  
  static int st_hp_volume_offset_put(struct snd_kcontrol *ctl,
  				   struct snd_ctl_elem_value *value)
  {
  	static const s8 offsets[] = { 2*-18, 2*-6, 0 };
  	struct oxygen *chip = ctl->private_data;
  	struct xonar_pcm179x *data = chip->model_data;
  	s8 offset;
  	int changed;
  
  	if (value->value.enumerated.item[0] > 2)
  		return -EINVAL;
  	offset = offsets[value->value.enumerated.item[0]];
  	mutex_lock(&chip->mutex);
  	changed = offset != data->hp_gain_offset;
  	if (changed) {
  		data->hp_gain_offset = offset;
  		update_pcm1796_volume(chip);
  	}
  	mutex_unlock(&chip->mutex);
  	return changed;
  }
  
  static const struct snd_kcontrol_new st_controls[] = {
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Analog Output",
  		.info = st_output_switch_info,
  		.get = st_output_switch_get,
  		.put = st_output_switch_put,
  	},
  	{
  		.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  		.name = "Headphones Impedance Playback Enum",
  		.info = st_hp_volume_offset_info,
  		.get = st_hp_volume_offset_get,
  		.put = st_hp_volume_offset_put,
  	},

  };
  
  static void xonar_line_mic_ac97_switch(struct oxygen *chip,
  				       unsigned int reg, unsigned int mute)
  {
  	if (reg == AC97_LINE) {
  		spin_lock_irq(&chip->reg_lock);
  		oxygen_write16_masked(chip, OXYGEN_GPIO_DATA,
  				      mute ? GPIO_INPUT_ROUTE : 0,
  				      GPIO_INPUT_ROUTE);
  		spin_unlock_irq(&chip->reg_lock);
  	}
  }
  
  static const DECLARE_TLV_DB_SCALE(pcm1796_db_scale, -6000, 50, 0);
  
  static int xonar_d2_control_filter(struct snd_kcontrol_new *template)
  {
  	if (!strncmp(template->name, "CD Capture ", 11))
  		/* CD in is actually connected to the video in pin */
  		template->private_value ^= AC97_CD ^ AC97_VIDEO;
  	return 0;
  }

  static int xonar_st_h6_control_filter(struct snd_kcontrol_new *template)
  {
  	if (!strncmp(template->name, "Master Playback ", 16))
  		/* no volume/mute, as I²C to the third DAC does not work */
  		return 1;
  	return 0;
  }

  static int add_pcm1796_controls(struct oxygen *chip)
  {

  	struct xonar_pcm179x *data = chip->model_data;

  	int err;

  	if (!data->broken_i2c) {
  		err = snd_ctl_add(chip->card,
  				  snd_ctl_new1(&rolloff_control, chip));
  		if (err < 0)
  			return err;

  	}

  	return 0;
  }

  static int xonar_d2_mixer_init(struct oxygen *chip)
  {

  	int err;
  
  	err = snd_ctl_add(chip->card, snd_ctl_new1(&alt_switch, chip));
  	if (err < 0)
  		return err;

  	err = add_pcm1796_controls(chip);

  	if (err < 0)
  		return err;
  	return 0;
  }
  
  static int xonar_hdav_mixer_init(struct oxygen *chip)
  {

  	int err;
  
  	err = snd_ctl_add(chip->card, snd_ctl_new1(&hdav_hdmi_control, chip));
  	if (err < 0)
  		return err;
  	err = add_pcm1796_controls(chip);
  	if (err < 0)
  		return err;
  	return 0;

  }
  
  static int xonar_st_mixer_init(struct oxygen *chip)
  {

  	unsigned int i;
  	int err;
  
  	for (i = 0; i < ARRAY_SIZE(st_controls); ++i) {
  		err = snd_ctl_add(chip->card,
  				  snd_ctl_new1(&st_controls[i], chip));
  		if (err < 0)
  			return err;
  	}

  	err = add_pcm1796_controls(chip);

  	if (err < 0)
  		return err;

  	return 0;

  }

  static void dump_pcm1796_registers(struct oxygen *chip,
  				   struct snd_info_buffer *buffer)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int dac, i;
  
  	for (dac = 0; dac < data->dacs; ++dac) {
  		snd_iprintf(buffer, "
  PCM1796 %u:", dac + 1);
  		for (i = 0; i < 5; ++i)
  			snd_iprintf(buffer, " %02x",
  				    data->pcm1796_regs[dac][i]);
  	}
  	snd_iprintf(buffer, "
  ");
  }
  
  static void dump_cs2000_registers(struct oxygen *chip,
  				  struct snd_info_buffer *buffer)
  {
  	struct xonar_pcm179x *data = chip->model_data;
  	unsigned int i;
  
  	if (data->has_cs2000) {
  		snd_iprintf(buffer, "
  CS2000:
  00:   ");
  		for (i = 1; i < 0x10; ++i)
  			snd_iprintf(buffer, " %02x", data->cs2000_regs[i]);
  		snd_iprintf(buffer, "
  10:");
  		for (i = 0x10; i < 0x1f; ++i)
  			snd_iprintf(buffer, " %02x", data->cs2000_regs[i]);
  		snd_iprintf(buffer, "
  ");
  	}
  }
  
  static void dump_st_registers(struct oxygen *chip,
  			      struct snd_info_buffer *buffer)
  {
  	dump_pcm1796_registers(chip, buffer);
  	dump_cs2000_registers(chip, buffer);
  }

  static const struct oxygen_model model_xonar_d2 = {
  	.longname = "Asus Virtuoso 200",
  	.chip = "AV200",
  	.init = xonar_d2_init,
  	.control_filter = xonar_d2_control_filter,
  	.mixer_init = xonar_d2_mixer_init,
  	.cleanup = xonar_d2_cleanup,
  	.suspend = xonar_d2_suspend,
  	.resume = xonar_d2_resume,
  	.set_dac_params = set_pcm1796_params,
  	.set_adc_params = xonar_set_cs53x1_params,
  	.update_dac_volume = update_pcm1796_volume,
  	.update_dac_mute = update_pcm1796_mute,

  	.dump_registers = dump_pcm1796_registers,

  	.dac_tlv = pcm1796_db_scale,
  	.model_data_size = sizeof(struct xonar_pcm179x),
  	.device_config = PLAYBACK_0_TO_I2S |
  			 PLAYBACK_1_TO_SPDIF |
  			 CAPTURE_0_FROM_I2S_2 |
  			 CAPTURE_1_FROM_SPDIF |
  			 MIDI_OUTPUT |

  			 MIDI_INPUT |
  			 AC97_CD_INPUT,

  	.dac_channels_pcm = 8,
  	.dac_channels_mixer = 8,

  	.dac_volume_min = 255 - 2*60,
  	.dac_volume_max = 255,
  	.misc_flags = OXYGEN_MISC_MIDI,
  	.function_flags = OXYGEN_FUNCTION_SPI |
  			  OXYGEN_FUNCTION_ENABLE_SPI_4_5,

  	.dac_mclks = OXYGEN_MCLKS(512, 128, 128),

  	.adc_mclks = OXYGEN_MCLKS(256, 128, 128),

  	.dac_i2s_format = OXYGEN_I2S_FORMAT_I2S,

  	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
  };
  
  static const struct oxygen_model model_xonar_hdav = {
  	.longname = "Asus Virtuoso 200",
  	.chip = "AV200",
  	.init = xonar_hdav_init,

  	.mixer_init = xonar_hdav_mixer_init,

  	.cleanup = xonar_hdav_cleanup,
  	.suspend = xonar_hdav_suspend,
  	.resume = xonar_hdav_resume,
  	.pcm_hardware_filter = xonar_hdmi_pcm_hardware_filter,
  	.set_dac_params = set_hdav_params,
  	.set_adc_params = xonar_set_cs53x1_params,
  	.update_dac_volume = update_pcm1796_volume,
  	.update_dac_mute = update_pcm1796_mute,
  	.uart_input = xonar_hdmi_uart_input,
  	.ac97_switch = xonar_line_mic_ac97_switch,

  	.dump_registers = dump_pcm1796_registers,

  	.dac_tlv = pcm1796_db_scale,
  	.model_data_size = sizeof(struct xonar_hdav),
  	.device_config = PLAYBACK_0_TO_I2S |
  			 PLAYBACK_1_TO_SPDIF |
  			 CAPTURE_0_FROM_I2S_2 |
  			 CAPTURE_1_FROM_SPDIF,

  	.dac_channels_pcm = 8,
  	.dac_channels_mixer = 2,

  	.dac_volume_min = 255 - 2*60,
  	.dac_volume_max = 255,
  	.misc_flags = OXYGEN_MISC_MIDI,
  	.function_flags = OXYGEN_FUNCTION_2WIRE,

  	.dac_mclks = OXYGEN_MCLKS(512, 128, 128),

  	.adc_mclks = OXYGEN_MCLKS(256, 128, 128),

  	.dac_i2s_format = OXYGEN_I2S_FORMAT_I2S,

  	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
  };
  
  static const struct oxygen_model model_xonar_st = {
  	.longname = "Asus Virtuoso 100",
  	.chip = "AV200",
  	.init = xonar_st_init,

  	.mixer_init = xonar_st_mixer_init,
  	.cleanup = xonar_st_cleanup,
  	.suspend = xonar_st_suspend,
  	.resume = xonar_st_resume,

  	.set_dac_params = set_st_params,

  	.set_adc_params = xonar_set_cs53x1_params,
  	.update_dac_volume = update_pcm1796_volume,
  	.update_dac_mute = update_pcm1796_mute,
  	.ac97_switch = xonar_line_mic_ac97_switch,

  	.dump_registers = dump_st_registers,

  	.dac_tlv = pcm1796_db_scale,
  	.model_data_size = sizeof(struct xonar_pcm179x),
  	.device_config = PLAYBACK_0_TO_I2S |
  			 PLAYBACK_1_TO_SPDIF |

  			 CAPTURE_0_FROM_I2S_2 |

  			 CAPTURE_1_FROM_SPDIF |

  			 AC97_FMIC_SWITCH,

  	.dac_channels_pcm = 2,
  	.dac_channels_mixer = 2,

  	.dac_volume_min = 255 - 2*60,
  	.dac_volume_max = 255,
  	.function_flags = OXYGEN_FUNCTION_2WIRE,

  	.dac_mclks = OXYGEN_MCLKS(512, 128, 128),

  	.adc_mclks = OXYGEN_MCLKS(256, 128, 128),

  	.dac_i2s_format = OXYGEN_I2S_FORMAT_I2S,

  	.adc_i2s_format = OXYGEN_I2S_FORMAT_LJUST,
  };
  
  int __devinit get_xonar_pcm179x_model(struct oxygen *chip,
  				      const struct pci_device_id *id)
  {
  	switch (id->subdevice) {
  	case 0x8269:
  		chip->model = model_xonar_d2;
  		chip->model.shortname = "Xonar D2";
  		break;
  	case 0x82b7:
  		chip->model = model_xonar_d2;
  		chip->model.shortname = "Xonar D2X";
  		chip->model.init = xonar_d2x_init;
  		break;
  	case 0x8314:
  		chip->model = model_xonar_hdav;
  		oxygen_clear_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_DB_MASK);
  		switch (oxygen_read16(chip, OXYGEN_GPIO_DATA) & GPIO_DB_MASK) {
  		default:
  			chip->model.shortname = "Xonar HDAV1.3";
  			break;
  		case GPIO_DB_H6:
  			chip->model.shortname = "Xonar HDAV1.3+H6";

  			chip->model.dac_channels_mixer = 8;

  			chip->model.dac_mclks = OXYGEN_MCLKS(256, 128, 128);

  			break;
  		}
  		break;
  	case 0x835d:
  		chip->model = model_xonar_st;
  		oxygen_clear_bits16(chip, OXYGEN_GPIO_CONTROL, GPIO_DB_MASK);
  		switch (oxygen_read16(chip, OXYGEN_GPIO_DATA) & GPIO_DB_MASK) {
  		default:
  			chip->model.shortname = "Xonar ST";
  			break;
  		case GPIO_DB_H6:
  			chip->model.shortname = "Xonar ST+H6";

  			chip->model.control_filter = xonar_st_h6_control_filter;

  			chip->model.dac_channels_pcm = 8;
  			chip->model.dac_channels_mixer = 8;

  			chip->model.dac_volume_min = 255;

  			chip->model.dac_mclks = OXYGEN_MCLKS(256, 128, 128);

  			break;
  		}
  		break;
  	case 0x835c:
  		chip->model = model_xonar_st;
  		chip->model.shortname = "Xonar STX";
  		chip->model.init = xonar_stx_init;

  		chip->model.resume = xonar_stx_resume;
  		chip->model.set_dac_params = set_pcm1796_params;

  		break;
  	default:
  		return -EINVAL;
  	}
  	return 0;
  }