/*
   * PMac AWACS lowlevel functions
   *
   * Copyright (c) by Takashi Iwai <tiwai@suse.de>
   * code based on dmasound.c.
   *
   *   This program is free software; you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program 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 program; if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */

  #include <asm/io.h>
  #include <asm/nvram.h>
  #include <linux/init.h>
  #include <linux/delay.h>
  #include <linux/slab.h>
  #include <sound/core.h>
  #include "pmac.h"
  
  
  #ifdef CONFIG_ADB_CUDA
  #define PMAC_AMP_AVAIL
  #endif
  
  #ifdef PMAC_AMP_AVAIL

  struct awacs_amp {

  	unsigned char amp_master;
  	unsigned char amp_vol[2][2];
  	unsigned char amp_tone[2];

  };

  
  #define CHECK_CUDA_AMP() (sys_ctrler == SYS_CTRLER_CUDA)
  
  #endif /* PMAC_AMP_AVAIL */

  static void snd_pmac_screamer_wait(struct snd_pmac *chip)

  {
  	long timeout = 2000;
  	while (!(in_le32(&chip->awacs->codec_stat) & MASK_VALID)) {
  		mdelay(1);
  		if (! --timeout) {
  			snd_printd("snd_pmac_screamer_wait timeout
  ");
  			break;
  		}
  	}
  }
  
  /*
   * write AWACS register
   */
  static void

  snd_pmac_awacs_write(struct snd_pmac *chip, int val)

  {
  	long timeout = 5000000;
  
  	if (chip->model == PMAC_SCREAMER)
  		snd_pmac_screamer_wait(chip);
  	out_le32(&chip->awacs->codec_ctrl, val | (chip->subframe << 22));
  	while (in_le32(&chip->awacs->codec_ctrl) & MASK_NEWECMD) {
  		if (! --timeout) {
  			snd_printd("snd_pmac_awacs_write timeout
  ");
  			break;
  		}
  	}
  }
  
  static void

  snd_pmac_awacs_write_reg(struct snd_pmac *chip, int reg, int val)

  {
  	snd_pmac_awacs_write(chip, val | (reg << 12));
  	chip->awacs_reg[reg] = val;
  }
  
  static void

  snd_pmac_awacs_write_noreg(struct snd_pmac *chip, int reg, int val)

  {
  	snd_pmac_awacs_write(chip, val | (reg << 12));
  }

  #ifdef CONFIG_PM

  /* Recalibrate chip */

  static void screamer_recalibrate(struct snd_pmac *chip)

  {
  	if (chip->model != PMAC_SCREAMER)
  		return;
  
  	/* Sorry for the horrible delays... I hope to get that improved
  	 * by making the whole PM process asynchronous in a future version
  	 */
  	snd_pmac_awacs_write_noreg(chip, 1, chip->awacs_reg[1]);
  	if (chip->manufacturer == 0x1)
  		/* delay for broken crystal part */

  		msleep(750);

  	snd_pmac_awacs_write_noreg(chip, 1,

  				   chip->awacs_reg[1] | MASK_RECALIBRATE |
  				   MASK_CMUTE | MASK_AMUTE);

  	snd_pmac_awacs_write_noreg(chip, 1, chip->awacs_reg[1]);
  	snd_pmac_awacs_write_noreg(chip, 6, chip->awacs_reg[6]);
  }
  
  #else
  #define screamer_recalibrate(chip) /* NOP */
  #endif
  
  
  /*
   * additional callback to set the pcm format
   */

  static void snd_pmac_awacs_set_format(struct snd_pmac *chip)

  {
  	chip->awacs_reg[1] &= ~MASK_SAMPLERATE;
  	chip->awacs_reg[1] |= chip->rate_index << 3;
  	snd_pmac_awacs_write_reg(chip, 1, chip->awacs_reg[1]);
  }
  
  
  /*
   * AWACS volume callbacks
   */
  /*
   * volumes: 0-15 stereo
   */

  static int snd_pmac_awacs_info_volume(struct snd_kcontrol *kcontrol,
  				      struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 2;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = 15;
  	return 0;
  }

  static int snd_pmac_awacs_get_volume(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int lshift = (kcontrol->private_value >> 8) & 0xff;
  	int inverted = (kcontrol->private_value >> 16) & 1;
  	unsigned long flags;
  	int vol[2];
  
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	vol[0] = (chip->awacs_reg[reg] >> lshift) & 0xf;
  	vol[1] = chip->awacs_reg[reg] & 0xf;
  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	if (inverted) {
  		vol[0] = 0x0f - vol[0];
  		vol[1] = 0x0f - vol[1];
  	}
  	ucontrol->value.integer.value[0] = vol[0];
  	ucontrol->value.integer.value[1] = vol[1];
  	return 0;
  }

  static int snd_pmac_awacs_put_volume(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int lshift = (kcontrol->private_value >> 8) & 0xff;
  	int inverted = (kcontrol->private_value >> 16) & 1;
  	int val, oldval;
  	unsigned long flags;

  	unsigned int vol[2];

  
  	vol[0] = ucontrol->value.integer.value[0];
  	vol[1] = ucontrol->value.integer.value[1];

  	if (vol[0] > 0x0f || vol[1] > 0x0f)
  		return -EINVAL;

  	if (inverted) {
  		vol[0] = 0x0f - vol[0];
  		vol[1] = 0x0f - vol[1];
  	}
  	vol[0] &= 0x0f;
  	vol[1] &= 0x0f;
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	oldval = chip->awacs_reg[reg];
  	val = oldval & ~(0xf | (0xf << lshift));
  	val |= vol[0] << lshift;
  	val |= vol[1];
  	if (oldval != val)
  		snd_pmac_awacs_write_reg(chip, reg, val);
  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	return oldval != reg;
  }
  
  
  #define AWACS_VOLUME(xname, xreg, xshift, xinverted) \
  { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = 0, \
    .info = snd_pmac_awacs_info_volume, \
    .get = snd_pmac_awacs_get_volume, \
    .put = snd_pmac_awacs_put_volume, \
    .private_value = (xreg) | ((xshift) << 8) | ((xinverted) << 16) }
  
  /*
   * mute master/ogain for AWACS: mono
   */

  static int snd_pmac_awacs_get_switch(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int shift = (kcontrol->private_value >> 8) & 0xff;
  	int invert = (kcontrol->private_value >> 16) & 1;
  	int val;
  	unsigned long flags;
  
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	val = (chip->awacs_reg[reg] >> shift) & 1;
  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	if (invert)
  		val = 1 - val;
  	ucontrol->value.integer.value[0] = val;
  	return 0;
  }

  static int snd_pmac_awacs_put_switch(struct snd_kcontrol *kcontrol,
  				     struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int reg = kcontrol->private_value & 0xff;
  	int shift = (kcontrol->private_value >> 8) & 0xff;
  	int invert = (kcontrol->private_value >> 16) & 1;
  	int mask = 1 << shift;
  	int val, changed;
  	unsigned long flags;
  
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	val = chip->awacs_reg[reg] & ~mask;
  	if (ucontrol->value.integer.value[0] != invert)
  		val |= mask;
  	changed = chip->awacs_reg[reg] != val;
  	if (changed)
  		snd_pmac_awacs_write_reg(chip, reg, val);
  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	return changed;
  }
  
  #define AWACS_SWITCH(xname, xreg, xshift, xinvert) \
  { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = 0, \
    .info = snd_pmac_boolean_mono_info, \
    .get = snd_pmac_awacs_get_switch, \
    .put = snd_pmac_awacs_put_switch, \
    .private_value = (xreg) | ((xshift) << 8) | ((xinvert) << 16) }
  
  
  #ifdef PMAC_AMP_AVAIL
  /*
   * controls for perch/whisper extension cards, e.g. G3 desktop
   *
   * TDA7433 connected via i2c address 0x45 (= 0x8a),
   * accessed through cuda
   */
  static void awacs_set_cuda(int reg, int val)
  {
  	struct adb_request req;

  	cuda_request(&req, NULL, 5, CUDA_PACKET, CUDA_GET_SET_IIC, 0x8a,
  			reg, val);

  	while (! req.complete)
  		cuda_poll();
  }
  
  /*
   * level = 0 - 14, 7 = 0 dB
   */

  static void awacs_amp_set_tone(struct awacs_amp *amp, int bass, int treble)

  {
  	amp->amp_tone[0] = bass;
  	amp->amp_tone[1] = treble;
  	if (bass > 7)
  		bass = (14 - bass) + 8;
  	if (treble > 7)
  		treble = (14 - treble) + 8;
  	awacs_set_cuda(2, (bass << 4) | treble);
  }
  
  /*
   * vol = 0 - 31 (attenuation), 32 = mute bit, stereo
   */

  static int awacs_amp_set_vol(struct awacs_amp *amp, int index,
  			     int lvol, int rvol, int do_check)

  {
  	if (do_check && amp->amp_vol[index][0] == lvol &&

  			amp->amp_vol[index][1] == rvol)

  		return 0;
  	awacs_set_cuda(3 + index, lvol);
  	awacs_set_cuda(5 + index, rvol);
  	amp->amp_vol[index][0] = lvol;
  	amp->amp_vol[index][1] = rvol;
  	return 1;
  }
  
  /*
   * 0 = -79 dB, 79 = 0 dB, 99 = +20 dB
   */

  static void awacs_amp_set_master(struct awacs_amp *amp, int vol)

  {
  	amp->amp_master = vol;
  	if (vol <= 79)
  		vol = 32 + (79 - vol);
  	else
  		vol = 32 - (vol - 79);
  	awacs_set_cuda(1, vol);
  }

  static void awacs_amp_free(struct snd_pmac *chip)

  {

  	struct awacs_amp *amp = chip->mixer_data;

  	if (!amp)
  		return;

  	kfree(amp);
  	chip->mixer_data = NULL;
  	chip->mixer_free = NULL;
  }
  
  
  /*
   * mixer controls
   */

  static int snd_pmac_awacs_info_volume_amp(struct snd_kcontrol *kcontrol,
  					  struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 2;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = 31;
  	return 0;
  }

  static int snd_pmac_awacs_get_volume_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;

  	struct awacs_amp *amp = chip->mixer_data;

  	ucontrol->value.integer.value[0] = 31 - (amp->amp_vol[index][0] & 31);
  	ucontrol->value.integer.value[1] = 31 - (amp->amp_vol[index][1] & 31);
  	return 0;
  }

  static int snd_pmac_awacs_put_volume_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;
  	int vol[2];

  	struct awacs_amp *amp = chip->mixer_data;

  	vol[0] = (31 - (ucontrol->value.integer.value[0] & 31))
  		| (amp->amp_vol[index][0] & 32);
  	vol[1] = (31 - (ucontrol->value.integer.value[1] & 31))
  		| (amp->amp_vol[index][1] & 32);

  	return awacs_amp_set_vol(amp, index, vol[0], vol[1], 1);
  }

  static int snd_pmac_awacs_get_switch_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;

  	struct awacs_amp *amp = chip->mixer_data;

  	ucontrol->value.integer.value[0] = (amp->amp_vol[index][0] & 32)
  					? 0 : 1;
  	ucontrol->value.integer.value[1] = (amp->amp_vol[index][1] & 32)
  					? 0 : 1;

  	return 0;
  }

  static int snd_pmac_awacs_put_switch_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;
  	int vol[2];

  	struct awacs_amp *amp = chip->mixer_data;

  	vol[0] = (ucontrol->value.integer.value[0] ? 0 : 32)
  		| (amp->amp_vol[index][0] & 31);
  	vol[1] = (ucontrol->value.integer.value[1] ? 0 : 32)
  		| (amp->amp_vol[index][1] & 31);

  	return awacs_amp_set_vol(amp, index, vol[0], vol[1], 1);
  }

  static int snd_pmac_awacs_info_tone_amp(struct snd_kcontrol *kcontrol,
  					struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 1;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = 14;
  	return 0;
  }

  static int snd_pmac_awacs_get_tone_amp(struct snd_kcontrol *kcontrol,
  				       struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;

  	struct awacs_amp *amp = chip->mixer_data;

  	ucontrol->value.integer.value[0] = amp->amp_tone[index];
  	return 0;
  }

  static int snd_pmac_awacs_put_tone_amp(struct snd_kcontrol *kcontrol,
  				       struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int index = kcontrol->private_value;

  	struct awacs_amp *amp = chip->mixer_data;

  	unsigned int val;

  	val = ucontrol->value.integer.value[0];
  	if (val > 14)
  		return -EINVAL;
  	if (val != amp->amp_tone[index]) {
  		amp->amp_tone[index] = val;

  		awacs_amp_set_tone(amp, amp->amp_tone[0], amp->amp_tone[1]);
  		return 1;
  	}
  	return 0;
  }

  static int snd_pmac_awacs_info_master_amp(struct snd_kcontrol *kcontrol,
  					  struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 1;
  	uinfo->value.integer.min = 0;
  	uinfo->value.integer.max = 99;
  	return 0;
  }

  static int snd_pmac_awacs_get_master_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
  	struct awacs_amp *amp = chip->mixer_data;

  	ucontrol->value.integer.value[0] = amp->amp_master;
  	return 0;
  }

  static int snd_pmac_awacs_put_master_amp(struct snd_kcontrol *kcontrol,
  					 struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
  	struct awacs_amp *amp = chip->mixer_data;

  	unsigned int val;

  	val = ucontrol->value.integer.value[0];
  	if (val > 99)
  		return -EINVAL;
  	if (val != amp->amp_master) {
  		amp->amp_master = val;

  		awacs_amp_set_master(amp, amp->amp_master);
  		return 1;
  	}
  	return 0;
  }
  
  #define AMP_CH_SPK	0
  #define AMP_CH_HD	1

  static struct snd_kcontrol_new snd_pmac_awacs_amp_vol[] __devinitdata = {

  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,

  	  .name = "Speaker Playback Volume",

  	  .info = snd_pmac_awacs_info_volume_amp,
  	  .get = snd_pmac_awacs_get_volume_amp,
  	  .put = snd_pmac_awacs_put_volume_amp,
  	  .private_value = AMP_CH_SPK,
  	},
  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	  .name = "Headphone Playback Volume",
  	  .info = snd_pmac_awacs_info_volume_amp,
  	  .get = snd_pmac_awacs_get_volume_amp,
  	  .put = snd_pmac_awacs_put_volume_amp,
  	  .private_value = AMP_CH_HD,
  	},
  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	  .name = "Tone Control - Bass",
  	  .info = snd_pmac_awacs_info_tone_amp,
  	  .get = snd_pmac_awacs_get_tone_amp,
  	  .put = snd_pmac_awacs_put_tone_amp,
  	  .private_value = 0,
  	},
  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	  .name = "Tone Control - Treble",
  	  .info = snd_pmac_awacs_info_tone_amp,
  	  .get = snd_pmac_awacs_get_tone_amp,
  	  .put = snd_pmac_awacs_put_tone_amp,
  	  .private_value = 1,
  	},
  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	  .name = "Amp Master Playback Volume",
  	  .info = snd_pmac_awacs_info_master_amp,
  	  .get = snd_pmac_awacs_get_master_amp,
  	  .put = snd_pmac_awacs_put_master_amp,
  	},
  };

  static struct snd_kcontrol_new snd_pmac_awacs_amp_hp_sw __devinitdata = {

  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
  	.name = "Headphone Playback Switch",
  	.info = snd_pmac_boolean_stereo_info,
  	.get = snd_pmac_awacs_get_switch_amp,
  	.put = snd_pmac_awacs_put_switch_amp,
  	.private_value = AMP_CH_HD,
  };

  static struct snd_kcontrol_new snd_pmac_awacs_amp_spk_sw __devinitdata = {

  	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,

  	.name = "Speaker Playback Switch",

  	.info = snd_pmac_boolean_stereo_info,
  	.get = snd_pmac_awacs_get_switch_amp,
  	.put = snd_pmac_awacs_put_switch_amp,
  	.private_value = AMP_CH_SPK,
  };
  
  #endif /* PMAC_AMP_AVAIL */
  
  
  /*
   * mic boost for screamer
   */

  static int snd_pmac_screamer_mic_boost_info(struct snd_kcontrol *kcontrol,
  					    struct snd_ctl_elem_info *uinfo)

  {
  	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
  	uinfo->count = 1;
  	uinfo->value.integer.min = 0;

  	uinfo->value.integer.max = 3;

  	return 0;
  }

  static int snd_pmac_screamer_mic_boost_get(struct snd_kcontrol *kcontrol,
  					   struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int val = 0;

  	unsigned long flags;
  
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	if (chip->awacs_reg[6] & MASK_MIC_BOOST)

  		val |= 2;
  	if (chip->awacs_reg[0] & MASK_GAINLINE)
  		val |= 1;

  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	ucontrol->value.integer.value[0] = val;
  	return 0;
  }

  static int snd_pmac_screamer_mic_boost_put(struct snd_kcontrol *kcontrol,
  					   struct snd_ctl_elem_value *ucontrol)

  {

  	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);

  	int changed = 0;
  	int val0, val6;
  	unsigned long flags;
  
  	spin_lock_irqsave(&chip->reg_lock, flags);
  	val0 = chip->awacs_reg[0] & ~MASK_GAINLINE;
  	val6 = chip->awacs_reg[6] & ~MASK_MIC_BOOST;

  	if (ucontrol->value.integer.value[0] & 1)

  		val0 |= MASK_GAINLINE;

  	if (ucontrol->value.integer.value[0] & 2)
  		val6 |= MASK_MIC_BOOST;

  	if (val0 != chip->awacs_reg[0]) {
  		snd_pmac_awacs_write_reg(chip, 0, val0);
  		changed = 1;
  	}
  	if (val6 != chip->awacs_reg[6]) {
  		snd_pmac_awacs_write_reg(chip, 6, val6);
  		changed = 1;
  	}
  	spin_unlock_irqrestore(&chip->reg_lock, flags);
  	return changed;
  }
  
  /*
   * lists of mixer elements
   */

  static struct snd_kcontrol_new snd_pmac_awacs_mixers[] __devinitdata = {

  	AWACS_SWITCH("Master Capture Switch", 1, SHIFT_LOOPTHRU, 0),

  	AWACS_VOLUME("Master Capture Volume", 0, 4, 0),
  /*	AWACS_SWITCH("Unknown Playback Switch", 6, SHIFT_PAROUT0, 0), */
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mixers_beige[] __devinitdata = {

  	AWACS_VOLUME("Master Playback Volume", 2, 6, 1),
  	AWACS_VOLUME("Play-through Playback Volume", 5, 6, 1),
  	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_MIC, 0),
  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_LINE, 0),
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mixers_lo[] __devinitdata = {

  	AWACS_VOLUME("Line out Playback Volume", 2, 6, 1),

  };

  static struct snd_kcontrol_new snd_pmac_screamer_mixers_imac[] __devinitdata = {

  	AWACS_VOLUME("Play-through Playback Volume", 5, 6, 1),

  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mixers_g4agp[] __devinitdata = {

  	AWACS_VOLUME("Line out Playback Volume", 2, 6, 1),
  	AWACS_VOLUME("Master Playback Volume", 5, 6, 1),
  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
  	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_MIC, 0),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac7500[] __devinitdata = {

  	AWACS_VOLUME("Line out Playback Volume", 2, 6, 1),
  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
  	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_MIC, 0),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac5500[] __devinitdata = {

  	AWACS_VOLUME("Headphone Playback Volume", 2, 6, 1),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_mixers_pmac[] __devinitdata = {

  	AWACS_VOLUME("Master Playback Volume", 2, 6, 1),

  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
  };
  
  /* FIXME: is this correct order?
   * screamer (powerbook G3 pismo) seems to have different bits...
   */

  static struct snd_kcontrol_new snd_pmac_awacs_mixers2[] __devinitdata = {

  	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_LINE, 0),
  	AWACS_SWITCH("Mic Capture Switch", 0, SHIFT_MUX_MIC, 0),
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mixers2[] __devinitdata = {

  	AWACS_SWITCH("Line Capture Switch", 0, SHIFT_MUX_MIC, 0),
  	AWACS_SWITCH("Mic Capture Switch", 0, SHIFT_MUX_LINE, 0),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_mixers2_pmac5500[] __devinitdata = {

  	AWACS_SWITCH("CD Capture Switch", 0, SHIFT_MUX_CD, 0),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_master_sw __devinitdata =

  AWACS_SWITCH("Master Playback Switch", 1, SHIFT_HDMUTE, 1);

  static struct snd_kcontrol_new snd_pmac_awacs_master_sw_imac __devinitdata =

  AWACS_SWITCH("Line out Playback Switch", 1, SHIFT_HDMUTE, 1);

  static struct snd_kcontrol_new snd_pmac_awacs_master_sw_pmac5500 __devinitdata =

  AWACS_SWITCH("Headphone Playback Switch", 1, SHIFT_HDMUTE, 1);

  static struct snd_kcontrol_new snd_pmac_awacs_mic_boost[] __devinitdata = {

  	AWACS_SWITCH("Mic Boost Capture Switch", 0, SHIFT_GAINLINE, 0),

  };

  static struct snd_kcontrol_new snd_pmac_screamer_mic_boost[] __devinitdata = {

  	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,

  	  .name = "Mic Boost Capture Volume",

  	  .info = snd_pmac_screamer_mic_boost_info,
  	  .get = snd_pmac_screamer_mic_boost_get,
  	  .put = snd_pmac_screamer_mic_boost_put,
  	},
  };

  static struct snd_kcontrol_new snd_pmac_awacs_mic_boost_pmac7500[] __devinitdata =

  {
  	AWACS_SWITCH("Line Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mic_boost_beige[] __devinitdata =

  {
  	AWACS_SWITCH("Line Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
  	AWACS_SWITCH("CD Boost Capture Switch", 6, SHIFT_MIC_BOOST, 0),
  };

  static struct snd_kcontrol_new snd_pmac_screamer_mic_boost_imac[] __devinitdata =

  {
  	AWACS_SWITCH("Line Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
  	AWACS_SWITCH("Mic Boost Capture Switch", 6, SHIFT_MIC_BOOST, 0),
  };

  static struct snd_kcontrol_new snd_pmac_awacs_speaker_vol[] __devinitdata = {

  	AWACS_VOLUME("Speaker Playback Volume", 4, 6, 1),

  };

  static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw __devinitdata =

  AWACS_SWITCH("Speaker Playback Switch", 1, SHIFT_SPKMUTE, 1);

  static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw_imac1 __devinitdata =

  AWACS_SWITCH("Speaker Playback Switch", 1, SHIFT_PAROUT1, 1);

  static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw_imac2 __devinitdata =

  AWACS_SWITCH("Speaker Playback Switch", 1, SHIFT_PAROUT1, 0);

  
  /*
   * add new mixer elements to the card
   */

  static int build_mixers(struct snd_pmac *chip, int nums,
  			struct snd_kcontrol_new *mixers)

  {
  	int i, err;
  
  	for (i = 0; i < nums; i++) {

  		err = snd_ctl_add(chip->card, snd_ctl_new1(&mixers[i], chip));
  		if (err < 0)

  			return err;
  	}
  	return 0;
  }
  
  
  /*
   * restore all registers
   */

  static void awacs_restore_all_regs(struct snd_pmac *chip)

  {
  	snd_pmac_awacs_write_noreg(chip, 0, chip->awacs_reg[0]);
  	snd_pmac_awacs_write_noreg(chip, 1, chip->awacs_reg[1]);
  	snd_pmac_awacs_write_noreg(chip, 2, chip->awacs_reg[2]);
  	snd_pmac_awacs_write_noreg(chip, 4, chip->awacs_reg[4]);
  	if (chip->model == PMAC_SCREAMER) {
  		snd_pmac_awacs_write_noreg(chip, 5, chip->awacs_reg[5]);
  		snd_pmac_awacs_write_noreg(chip, 6, chip->awacs_reg[6]);
  		snd_pmac_awacs_write_noreg(chip, 7, chip->awacs_reg[7]);
  	}
  }

  #ifdef CONFIG_PM

  static void snd_pmac_awacs_suspend(struct snd_pmac *chip)

  {
  	snd_pmac_awacs_write_noreg(chip, 1, (chip->awacs_reg[1]
  					     | MASK_AMUTE | MASK_CMUTE));
  }

  static void snd_pmac_awacs_resume(struct snd_pmac *chip)

  {

  	if (of_machine_is_compatible("PowerBook3,1")
  	    || of_machine_is_compatible("PowerBook3,2")) {

  		msleep(100);

  		snd_pmac_awacs_write_reg(chip, 1,
  			chip->awacs_reg[1] & ~MASK_PAROUT);

  		msleep(300);

  	}
  
  	awacs_restore_all_regs(chip);
  	if (chip->model == PMAC_SCREAMER) {
  		/* reset power bits in reg 6 */
  		mdelay(5);
  		snd_pmac_awacs_write_noreg(chip, 6, chip->awacs_reg[6]);
  	}
  	screamer_recalibrate(chip);
  #ifdef PMAC_AMP_AVAIL
  	if (chip->mixer_data) {

  		struct awacs_amp *amp = chip->mixer_data;

  		awacs_amp_set_vol(amp, 0,
  				  amp->amp_vol[0][0], amp->amp_vol[0][1], 0);
  		awacs_amp_set_vol(amp, 1,
  				  amp->amp_vol[1][0], amp->amp_vol[1][1], 0);

  		awacs_amp_set_tone(amp, amp->amp_tone[0], amp->amp_tone[1]);
  		awacs_amp_set_master(amp, amp->amp_master);
  	}
  #endif
  }

  #endif /* CONFIG_PM */

  #define IS_PM7500 (of_machine_is_compatible("AAPL,7500") \
  		|| of_machine_is_compatible("AAPL,8500") \
  		|| of_machine_is_compatible("AAPL,9500"))
  #define IS_PM5500 (of_machine_is_compatible("AAPL,e411"))
  #define IS_BEIGE (of_machine_is_compatible("AAPL,Gossamer"))
  #define IS_IMAC1 (of_machine_is_compatible("PowerMac2,1"))
  #define IS_IMAC2 (of_machine_is_compatible("PowerMac2,2") \
  		|| of_machine_is_compatible("PowerMac4,1"))
  #define IS_G4AGP (of_machine_is_compatible("PowerMac3,1"))
  #define IS_LOMBARD (of_machine_is_compatible("PowerBook1,1"))

  static int imac1, imac2;

  #ifdef PMAC_SUPPORT_AUTOMUTE
  /*
   * auto-mute stuffs
   */

  static int snd_pmac_awacs_detect_headphone(struct snd_pmac *chip)

  {
  	return (in_le32(&chip->awacs->codec_stat) & chip->hp_stat_mask) ? 1 : 0;
  }
  
  #ifdef PMAC_AMP_AVAIL

  static int toggle_amp_mute(struct awacs_amp *amp, int index, int mute)

  {
  	int vol[2];
  	vol[0] = amp->amp_vol[index][0] & 31;
  	vol[1] = amp->amp_vol[index][1] & 31;
  	if (mute) {
  		vol[0] |= 32;
  		vol[1] |= 32;
  	}
  	return awacs_amp_set_vol(amp, index, vol[0], vol[1], 1);
  }
  #endif

  static void snd_pmac_awacs_update_automute(struct snd_pmac *chip, int do_notify)

  {
  	if (chip->auto_mute) {
  #ifdef PMAC_AMP_AVAIL
  		if (chip->mixer_data) {

  			struct awacs_amp *amp = chip->mixer_data;

  			int changed;
  			if (snd_pmac_awacs_detect_headphone(chip)) {
  				changed = toggle_amp_mute(amp, AMP_CH_HD, 0);
  				changed |= toggle_amp_mute(amp, AMP_CH_SPK, 1);
  			} else {
  				changed = toggle_amp_mute(amp, AMP_CH_HD, 1);
  				changed |= toggle_amp_mute(amp, AMP_CH_SPK, 0);
  			}
  			if (do_notify && ! changed)
  				return;
  		} else
  #endif
  		{

  			int reg = chip->awacs_reg[1]
  				| (MASK_HDMUTE | MASK_SPKMUTE);

  			if (imac1) {
  				reg &= ~MASK_SPKMUTE;
  				reg |= MASK_PAROUT1;
  			} else if (imac2) {

  				reg &= ~MASK_SPKMUTE;
  				reg &= ~MASK_PAROUT1;
  			}

  			if (snd_pmac_awacs_detect_headphone(chip))
  				reg &= ~MASK_HDMUTE;

  			else if (imac1)
  				reg &= ~MASK_PAROUT1;
  			else if (imac2)

  				reg |= MASK_PAROUT1;

  			else
  				reg &= ~MASK_SPKMUTE;
  			if (do_notify && reg == chip->awacs_reg[1])
  				return;
  			snd_pmac_awacs_write_reg(chip, 1, reg);
  		}
  		if (do_notify) {
  			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
  				       &chip->master_sw_ctl->id);
  			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
  				       &chip->speaker_sw_ctl->id);
  			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
  				       &chip->hp_detect_ctl->id);
  		}
  	}
  }
  #endif /* PMAC_SUPPORT_AUTOMUTE */
  
  
  /*
   * initialize chip
   */

  int __devinit

  snd_pmac_awacs_init(struct snd_pmac *chip)

  {

  	int pm7500 = IS_PM7500;

  	int pm5500 = IS_PM5500;

  	int beige = IS_BEIGE;

  	int g4agp = IS_G4AGP;

  	int lombard = IS_LOMBARD;

  	int imac;

  	int err, vol;

  	struct snd_kcontrol *vmaster_sw, *vmaster_vol;
  	struct snd_kcontrol *master_vol, *speaker_vol;

  	imac1 = IS_IMAC1;
  	imac2 = IS_IMAC2;
  	imac = imac1 || imac2;

  	/* looks like MASK_GAINLINE triggers something, so we set here
  	 * as start-up
  	 */
  	chip->awacs_reg[0] = MASK_MUX_CD | 0xff | MASK_GAINLINE;
  	chip->awacs_reg[1] = MASK_CMUTE | MASK_AMUTE;
  	/* FIXME: Only machines with external SRS module need MASK_PAROUT */
  	if (chip->has_iic || chip->device_id == 0x5 ||

  	    /* chip->_device_id == 0x8 || */

  	    chip->device_id == 0xb)
  		chip->awacs_reg[1] |= MASK_PAROUT;
  	/* get default volume from nvram */
  	// vol = (~nvram_read_byte(0x1308) & 7) << 1;
  	// vol = ((pmac_xpram_read( 8 ) & 7 ) << 1 );
  	vol = 0x0f; /* no, on alsa, muted as default */
  	vol = vol + (vol << 6);
  	chip->awacs_reg[2] = vol;
  	chip->awacs_reg[4] = vol;
  	if (chip->model == PMAC_SCREAMER) {

  		/* FIXME: screamer has loopthru vol control */
  		chip->awacs_reg[5] = vol;
  		/* FIXME: maybe should be vol << 3 for PCMCIA speaker */
  		chip->awacs_reg[6] = MASK_MIC_BOOST;

  		chip->awacs_reg[7] = 0;
  	}
  
  	awacs_restore_all_regs(chip);
  	chip->manufacturer = (in_le32(&chip->awacs->codec_stat) >> 8) & 0xf;
  	screamer_recalibrate(chip);
  
  	chip->revision = (in_le32(&chip->awacs->codec_stat) >> 12) & 0xf;
  #ifdef PMAC_AMP_AVAIL
  	if (chip->revision == 3 && chip->has_iic && CHECK_CUDA_AMP()) {

  		struct awacs_amp *amp = kzalloc(sizeof(*amp), GFP_KERNEL);

  		if (! amp)
  			return -ENOMEM;
  		chip->mixer_data = amp;

  		chip->mixer_free = awacs_amp_free;

  		/* mute and zero vol */
  		awacs_amp_set_vol(amp, 0, 63, 63, 0);

  		awacs_amp_set_vol(amp, 1, 63, 63, 0);
  		awacs_amp_set_tone(amp, 7, 7); /* 0 dB */
  		awacs_amp_set_master(amp, 79); /* 0 dB */
  	}
  #endif /* PMAC_AMP_AVAIL */
  
  	if (chip->hp_stat_mask == 0) {
  		/* set headphone-jack detection bit */
  		switch (chip->model) {
  		case PMAC_AWACS:

  			chip->hp_stat_mask = pm7500 || pm5500 ? MASK_HDPCONN

  				: MASK_LOCONN;

  			break;
  		case PMAC_SCREAMER:
  			switch (chip->device_id) {
  			case 0x08:

  			case 0x0B:
  				chip->hp_stat_mask = imac
  					? MASK_LOCONN_IMAC |
  					MASK_HDPLCONN_IMAC |
  					MASK_HDPRCONN_IMAC
  					: MASK_HDPCONN;

  				break;
  			case 0x00:
  			case 0x05:

  				chip->hp_stat_mask = MASK_LOCONN;

  				break;
  			default:

  				chip->hp_stat_mask = MASK_HDPCONN;

  				break;
  			}
  			break;
  		default:
  			snd_BUG();
  			break;
  		}
  	}
  
  	/*
  	 * build mixers
  	 */
  	strcpy(chip->card->mixername, "PowerMac AWACS");

  	err = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_mixers),
  				snd_pmac_awacs_mixers);
  	if (err < 0)

  		return err;

  	if (beige || g4agp)

  		;

  	else if (chip->model == PMAC_SCREAMER || pm5500)

  		err = build_mixers(chip, ARRAY_SIZE(snd_pmac_screamer_mixers2),
  				   snd_pmac_screamer_mixers2);

  	else if (!pm7500)

  		err = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_mixers2),
  				   snd_pmac_awacs_mixers2);
  	if (err < 0)
  		return err;

  	if (pm5500) {
  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_awacs_mixers2_pmac5500),
  				   snd_pmac_awacs_mixers2_pmac5500);
  		if (err < 0)
  			return err;
  	}

  	if (pm7500)
  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_awacs_mixers_pmac7500),
  				   snd_pmac_awacs_mixers_pmac7500);

  	else if (pm5500)
  		err = snd_ctl_add(chip->card,
  		    (master_vol = snd_ctl_new1(snd_pmac_awacs_mixers_pmac5500,
  						chip)));

  	else if (beige)
  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_screamer_mixers_beige),
  				   snd_pmac_screamer_mixers_beige);

  	else if (imac || lombard) {
  		err = snd_ctl_add(chip->card,
  		    (master_vol = snd_ctl_new1(snd_pmac_screamer_mixers_lo,
  						chip)));
  		if (err < 0)
  			return err;

  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_screamer_mixers_imac),
  				   snd_pmac_screamer_mixers_imac);

  	} else if (g4agp)

  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_screamer_mixers_g4agp),
  				   snd_pmac_screamer_mixers_g4agp);

  	else
  		err = build_mixers(chip,
  				   ARRAY_SIZE(snd_pmac_awacs_mixers_pmac),
  				   snd_pmac_awacs_mixers_pmac);
  	if (err < 0)
  		return err;

  	chip->master_sw_ctl = snd_ctl_new1((pm7500 || imac || g4agp || lombard)

  			? &snd_pmac_awacs_master_sw_imac

  			: pm5500
  			? &snd_pmac_awacs_master_sw_pmac5500

  			: &snd_pmac_awacs_master_sw, chip);

  	err = snd_ctl_add(chip->card, chip->master_sw_ctl);
  	if (err < 0)

  		return err;
  #ifdef PMAC_AMP_AVAIL
  	if (chip->mixer_data) {
  		/* use amplifier.  the signal is connected from route A
  		 * to the amp.  the amp has its headphone and speaker
  		 * volumes and mute switches, so we use them instead of
  		 * screamer registers.
  		 * in this case, it seems the route C is not used.
  		 */

  		err = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_amp_vol),
  					snd_pmac_awacs_amp_vol);
  		if (err < 0)

  			return err;
  		/* overwrite */

  		chip->master_sw_ctl = snd_ctl_new1(&snd_pmac_awacs_amp_hp_sw,
  							chip);
  		err = snd_ctl_add(chip->card, chip->master_sw_ctl);
  		if (err < 0)

  			return err;

  		chip->speaker_sw_ctl = snd_ctl_new1(&snd_pmac_awacs_amp_spk_sw,
  							chip);
  		err = snd_ctl_add(chip->card, chip->speaker_sw_ctl);
  		if (err < 0)

  			return err;
  	} else
  #endif /* PMAC_AMP_AVAIL */
  	{
  		/* route A = headphone, route C = speaker */

  		err = snd_ctl_add(chip->card,
  		    (speaker_vol = snd_ctl_new1(snd_pmac_awacs_speaker_vol,
  						chip)));

  		if (err < 0)

  			return err;

  		chip->speaker_sw_ctl = snd_ctl_new1(imac1
  				? &snd_pmac_awacs_speaker_sw_imac1
  				: imac2
  				? &snd_pmac_awacs_speaker_sw_imac2

  				: &snd_pmac_awacs_speaker_sw, chip);

  		err = snd_ctl_add(chip->card, chip->speaker_sw_ctl);
  		if (err < 0)

  			return err;
  	}

  	if (pm5500 || imac || lombard) {
  		vmaster_sw = snd_ctl_make_virtual_master(
  			"Master Playback Switch", (unsigned int *) NULL);
  		err = snd_ctl_add_slave_uncached(vmaster_sw,
  						 chip->master_sw_ctl);
  		if (err < 0)
  			return err;
  		err = snd_ctl_add_slave_uncached(vmaster_sw,
  						  chip->speaker_sw_ctl);
  		if (err < 0)
  			return err;
  		err = snd_ctl_add(chip->card, vmaster_sw);
  		if (err < 0)
  			return err;
  		vmaster_vol = snd_ctl_make_virtual_master(
  			"Master Playback Volume", (unsigned int *) NULL);
  		err = snd_ctl_add_slave(vmaster_vol, master_vol);
  		if (err < 0)
  			return err;
  		err = snd_ctl_add_slave(vmaster_vol, speaker_vol);
  		if (err < 0)
  			return err;
  		err = snd_ctl_add(chip->card, vmaster_vol);
  		if (err < 0)
  			return err;
  	}

  	if (beige || g4agp)

  		err = build_mixers(chip,
  				ARRAY_SIZE(snd_pmac_screamer_mic_boost_beige),
  				snd_pmac_screamer_mic_boost_beige);
  	else if (imac)
  		err = build_mixers(chip,
  				ARRAY_SIZE(snd_pmac_screamer_mic_boost_imac),
  				snd_pmac_screamer_mic_boost_imac);
  	else if (chip->model == PMAC_SCREAMER)
  		err = build_mixers(chip,
  				ARRAY_SIZE(snd_pmac_screamer_mic_boost),
  				snd_pmac_screamer_mic_boost);
  	else if (pm7500)
  		err = build_mixers(chip,
  				ARRAY_SIZE(snd_pmac_awacs_mic_boost_pmac7500),
  				snd_pmac_awacs_mic_boost_pmac7500);
  	else
  		err = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_mic_boost),
  				snd_pmac_awacs_mic_boost);
  	if (err < 0)
  		return err;

  
  	/*
  	 * set lowlevel callbacks
  	 */
  	chip->set_format = snd_pmac_awacs_set_format;

  #ifdef CONFIG_PM

  	chip->suspend = snd_pmac_awacs_suspend;
  	chip->resume = snd_pmac_awacs_resume;
  #endif
  #ifdef PMAC_SUPPORT_AUTOMUTE

  	err = snd_pmac_add_automute(chip);
  	if (err < 0)

  		return err;
  	chip->detect_headphone = snd_pmac_awacs_detect_headphone;
  	chip->update_automute = snd_pmac_awacs_update_automute;
  	snd_pmac_awacs_update_automute(chip, 0); /* update the status only */
  #endif
  	if (chip->model == PMAC_SCREAMER) {
  		snd_pmac_awacs_write_noreg(chip, 6, chip->awacs_reg[6]);
  		snd_pmac_awacs_write_noreg(chip, 0, chip->awacs_reg[0]);
  	}
  
  	return 0;
  }