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awacs.c

/*
 * 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\n");
                  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\n");
                  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[] __initdata = {
      { .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "PC 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 __initdata = {
      .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 __initdata = {
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "PC 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[] __initdata = {
      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[] __initdata = {
      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_imac[] __initdata = {
      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),
};

static struct snd_kcontrol_new snd_pmac_screamer_mixers_g4agp[] __initdata = {
      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[] __initdata = {
      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_pmac[] __initdata = {
      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[] __initdata = {
      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[] __initdata = {
      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_master_sw __initdata =
AWACS_SWITCH("Master Playback Switch", 1, SHIFT_HDMUTE, 1);

static struct snd_kcontrol_new snd_pmac_awacs_master_sw_imac __initdata =
AWACS_SWITCH("Line out Playback Switch", 1, SHIFT_HDMUTE, 1);

static struct snd_kcontrol_new snd_pmac_awacs_mic_boost[] __initdata = {
      AWACS_SWITCH("Mic Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
};

static struct snd_kcontrol_new snd_pmac_screamer_mic_boost[] __initdata = {
      { .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[] __initdata =
{
      AWACS_SWITCH("Line Boost Capture Switch", 0, SHIFT_GAINLINE, 0),
};

static struct snd_kcontrol_new snd_pmac_screamer_mic_boost_beige[] __initdata =
{
      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[] __initdata =
{
      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[] __initdata = {
      AWACS_VOLUME("PC Speaker Playback Volume", 4, 6, 1),
};

static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw __initdata =
AWACS_SWITCH("PC Speaker Playback Switch", 1, SHIFT_SPKMUTE, 1);

static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw_imac1 __initdata =
AWACS_SWITCH("PC Speaker Playback Switch", 1, SHIFT_PAROUT1, 1);

static struct snd_kcontrol_new snd_pmac_awacs_speaker_sw_imac2 __initdata =
AWACS_SWITCH("PC 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 (machine_is_compatible("PowerBook3,1")
          || 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 (machine_is_compatible("AAPL,7500"))
#define IS_BEIGE (machine_is_compatible("AAPL,Gossamer"))
#define IS_IMAC1 (machine_is_compatible("PowerMac2,1"))
#define IS_IMAC2 (machine_is_compatible("PowerMac2,2") \
            || machine_is_compatible("PowerMac4,1"))
#define IS_G4AGP (machine_is_compatible("PowerMac3,1"))

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 __init
snd_pmac_awacs_init(struct snd_pmac *chip)
{
      int pm7500 = IS_PM7500;
      int beige = IS_BEIGE;
      int g4agp = IS_G4AGP;
      int imac;
      int err, 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 ? 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)
            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 (pm7500)
            err = build_mixers(chip,
                           ARRAY_SIZE(snd_pmac_awacs_mixers_pmac7500),
                           snd_pmac_awacs_mixers_pmac7500);
      else if (beige)
            err = build_mixers(chip,
                           ARRAY_SIZE(snd_pmac_screamer_mixers_beige),
                           snd_pmac_screamer_mixers_beige);
      else if (imac)
            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)
                  ? &snd_pmac_awacs_master_sw_imac
                  : &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 = build_mixers(chip, ARRAY_SIZE(snd_pmac_awacs_speaker_vol),
                              snd_pmac_awacs_speaker_vol);
            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 (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;
}

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