diff --git a/sound/ppc/tumbler.c b/sound/ppc/tumbler.c
new file mode 100644
index 0000000..7d10385
--- /dev/null
+++ b/sound/ppc/tumbler.c
@@ -0,0 +1,1175 @@
+/*
+ * PMac Tumbler/Snapper lowlevel functions
+ *
+ * Copyright (c) by Takashi Iwai <tiwai@suse.de>
+ *
+ *   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
+ *
+ *   Rene Rebe <rene.rebe@gmx.net>:
+ *     * update from shadow registers on wakeup and headphone plug
+ *     * automatically toggle DRC on headphone plug
+ *	
+ */
+
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+#include <linux/kmod.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <sound/core.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
+#include <asm/pmac_feature.h>
+#endif
+#include "pmac.h"
+#include "tumbler_volume.h"
+
+/* i2c address for tumbler */
+#define TAS_I2C_ADDR	0x34
+
+/* registers */
+#define TAS_REG_MCS	0x01	/* main control */
+#define TAS_REG_DRC	0x02
+#define TAS_REG_VOL	0x04
+#define TAS_REG_TREBLE	0x05
+#define TAS_REG_BASS	0x06
+#define TAS_REG_INPUT1	0x07
+#define TAS_REG_INPUT2	0x08
+
+/* tas3001c */
+#define TAS_REG_PCM	TAS_REG_INPUT1
+ 
+/* tas3004 */
+#define TAS_REG_LMIX	TAS_REG_INPUT1
+#define TAS_REG_RMIX	TAS_REG_INPUT2
+#define TAS_REG_MCS2	0x43		/* main control 2 */
+#define TAS_REG_ACS	0x40		/* analog control */
+
+/* mono volumes for tas3001c/tas3004 */
+enum {
+	VOL_IDX_PCM_MONO, /* tas3001c only */
+	VOL_IDX_BASS, VOL_IDX_TREBLE,
+	VOL_IDX_LAST_MONO
+};
+
+/* stereo volumes for tas3004 */
+enum {
+	VOL_IDX_PCM, VOL_IDX_PCM2, VOL_IDX_ADC,
+	VOL_IDX_LAST_MIX
+};
+
+typedef struct pmac_gpio {
+#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
+	unsigned int addr;
+#else
+	void __iomem *addr;
+#endif
+	int active_state;
+} pmac_gpio_t;
+
+typedef struct pmac_tumbler_t {
+	pmac_keywest_t i2c;
+	pmac_gpio_t audio_reset;
+	pmac_gpio_t amp_mute;
+	pmac_gpio_t hp_mute;
+	pmac_gpio_t hp_detect;
+	int headphone_irq;
+	unsigned int master_vol[2];
+	unsigned int master_switch[2];
+	unsigned int mono_vol[VOL_IDX_LAST_MONO];
+	unsigned int mix_vol[VOL_IDX_LAST_MIX][2]; /* stereo volumes for tas3004 */
+	int drc_range;
+	int drc_enable;
+	int capture_source;
+} pmac_tumbler_t;
+
+
+/*
+ */
+
+static int send_init_client(pmac_keywest_t *i2c, unsigned int *regs)
+{
+	while (*regs > 0) {
+		int err, count = 10;
+		do {
+			err = i2c_smbus_write_byte_data(i2c->client,
+							regs[0], regs[1]);
+			if (err >= 0)
+				break;
+			mdelay(10);
+		} while (count--);
+		if (err < 0)
+			return -ENXIO;
+		regs += 2;
+	}
+	return 0;
+}
+
+
+static int tumbler_init_client(pmac_keywest_t *i2c)
+{
+	static unsigned int regs[] = {
+		/* normal operation, SCLK=64fps, i2s output, i2s input, 16bit width */
+		TAS_REG_MCS, (1<<6)|(2<<4)|(2<<2)|0,
+		0, /* terminator */
+	};
+	return send_init_client(i2c, regs);
+}
+
+static int snapper_init_client(pmac_keywest_t *i2c)
+{
+	static unsigned int regs[] = {
+		/* normal operation, SCLK=64fps, i2s output, 16bit width */
+		TAS_REG_MCS, (1<<6)|(2<<4)|0,
+		/* normal operation, all-pass mode */
+		TAS_REG_MCS2, (1<<1),
+		/* normal output, no deemphasis, A input, power-up, line-in */
+		TAS_REG_ACS, 0,
+		0, /* terminator */
+	};
+	return send_init_client(i2c, regs);
+}
+	
+/*
+ * gpio access
+ */
+#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
+#define do_gpio_write(gp, val) \
+	pmac_call_feature(PMAC_FTR_WRITE_GPIO, NULL, (gp)->addr, val)
+#define do_gpio_read(gp) \
+	pmac_call_feature(PMAC_FTR_READ_GPIO, NULL, (gp)->addr, 0)
+#define tumbler_gpio_free(gp) /* NOP */
+#else
+#define do_gpio_write(gp, val)	writeb(val, (gp)->addr)
+#define do_gpio_read(gp)	readb((gp)->addr)
+static inline void tumbler_gpio_free(pmac_gpio_t *gp)
+{
+	if (gp->addr) {
+		iounmap(gp->addr);
+		gp->addr = NULL;
+	}
+}
+#endif /* CONFIG_PPC_HAS_FEATURE_CALLS */
+
+static void write_audio_gpio(pmac_gpio_t *gp, int active)
+{
+	if (! gp->addr)
+		return;
+	active = active ? gp->active_state : !gp->active_state;
+	do_gpio_write(gp, active ? 0x05 : 0x04);
+}
+
+static int read_audio_gpio(pmac_gpio_t *gp)
+{
+	int ret;
+	if (! gp->addr)
+		return 0;
+	ret = ((do_gpio_read(gp) & 0x02) !=0);
+	return ret == gp->active_state;
+}
+
+/*
+ * update master volume
+ */
+static int tumbler_set_master_volume(pmac_tumbler_t *mix)
+{
+	unsigned char block[6];
+	unsigned int left_vol, right_vol;
+  
+	if (! mix->i2c.client)
+		return -ENODEV;
+  
+	if (! mix->master_switch[0])
+		left_vol = 0;
+	else {
+		left_vol = mix->master_vol[0];
+		if (left_vol >= ARRAY_SIZE(master_volume_table))
+			left_vol = ARRAY_SIZE(master_volume_table) - 1;
+		left_vol = master_volume_table[left_vol];
+	}
+	if (! mix->master_switch[1])
+		right_vol = 0;
+	else {
+		right_vol = mix->master_vol[1];
+		if (right_vol >= ARRAY_SIZE(master_volume_table))
+			right_vol = ARRAY_SIZE(master_volume_table) - 1;
+		right_vol = master_volume_table[right_vol];
+	}
+
+	block[0] = (left_vol >> 16) & 0xff;
+	block[1] = (left_vol >> 8)  & 0xff;
+	block[2] = (left_vol >> 0)  & 0xff;
+
+	block[3] = (right_vol >> 16) & 0xff;
+	block[4] = (right_vol >> 8)  & 0xff;
+	block[5] = (right_vol >> 0)  & 0xff;
+  
+	if (i2c_smbus_write_block_data(mix->i2c.client, TAS_REG_VOL,
+				       6, block) < 0) {
+		snd_printk("failed to set volume \n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+
+/* output volume */
+static int tumbler_info_master_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = ARRAY_SIZE(master_volume_table) - 1;
+	return 0;
+}
+
+static int tumbler_get_master_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+	snd_assert(mix, return -ENODEV);
+	ucontrol->value.integer.value[0] = mix->master_vol[0];
+	ucontrol->value.integer.value[1] = mix->master_vol[1];
+	return 0;
+}
+
+static int tumbler_put_master_volume(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+	int change;
+
+	snd_assert(mix, return -ENODEV);
+	change = mix->master_vol[0] != ucontrol->value.integer.value[0] ||
+		mix->master_vol[1] != ucontrol->value.integer.value[1];
+	if (change) {
+		mix->master_vol[0] = ucontrol->value.integer.value[0];
+		mix->master_vol[1] = ucontrol->value.integer.value[1];
+		tumbler_set_master_volume(mix);
+	}
+	return change;
+}
+
+/* output switch */
+static int tumbler_get_master_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+	snd_assert(mix, return -ENODEV);
+	ucontrol->value.integer.value[0] = mix->master_switch[0];
+	ucontrol->value.integer.value[1] = mix->master_switch[1];
+	return 0;
+}
+
+static int tumbler_put_master_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+	int change;
+
+	snd_assert(mix, return -ENODEV);
+	change = mix->master_switch[0] != ucontrol->value.integer.value[0] ||
+		mix->master_switch[1] != ucontrol->value.integer.value[1];
+	if (change) {
+		mix->master_switch[0] = !!ucontrol->value.integer.value[0];
+		mix->master_switch[1] = !!ucontrol->value.integer.value[1];
+		tumbler_set_master_volume(mix);
+	}
+	return change;
+}
+
+
+/*
+ * TAS3001c dynamic range compression
+ */
+
+#define TAS3001_DRC_MAX		0x5f
+
+static int tumbler_set_drc(pmac_tumbler_t *mix)
+{
+	unsigned char val[2];
+
+	if (! mix->i2c.client)
+		return -ENODEV;
+  
+	if (mix->drc_enable) {
+		val[0] = 0xc1; /* enable, 3:1 compression */
+		if (mix->drc_range > TAS3001_DRC_MAX)
+			val[1] = 0xf0;
+		else if (mix->drc_range < 0)
+			val[1] = 0x91;
+		else
+			val[1] = mix->drc_range + 0x91;
+	} else {
+		val[0] = 0;
+		val[1] = 0;
+	}
+
+	if (i2c_smbus_write_block_data(mix->i2c.client, TAS_REG_DRC,
+				       2, val) < 0) {
+		snd_printk("failed to set DRC\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+/*
+ * TAS3004
+ */
+
+#define TAS3004_DRC_MAX		0xef
+
+static int snapper_set_drc(pmac_tumbler_t *mix)
+{
+	unsigned char val[6];
+
+	if (! mix->i2c.client)
+		return -ENODEV;
+  
+	if (mix->drc_enable)
+		val[0] = 0x50; /* 3:1 above threshold */
+	else
+		val[0] = 0x51; /* disabled */
+	val[1] = 0x02; /* 1:1 below threshold */
+	if (mix->drc_range > 0xef)
+		val[2] = 0xef;
+	else if (mix->drc_range < 0)
+		val[2] = 0x00;
+	else
+		val[2] = mix->drc_range;
+	val[3] = 0xb0;
+	val[4] = 0x60;
+	val[5] = 0xa0;
+
+	if (i2c_smbus_write_block_data(mix->i2c.client, TAS_REG_DRC,
+				       6, val) < 0) {
+		snd_printk("failed to set DRC\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int tumbler_info_drc_value(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max =
+		chip->model == PMAC_TUMBLER ? TAS3001_DRC_MAX : TAS3004_DRC_MAX;
+	return 0;
+}
+
+static int tumbler_get_drc_value(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->drc_range;
+	return 0;
+}
+
+static int tumbler_put_drc_value(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->drc_range != ucontrol->value.integer.value[0];
+	if (change) {
+		mix->drc_range = ucontrol->value.integer.value[0];
+		if (chip->model == PMAC_TUMBLER)
+			tumbler_set_drc(mix);
+		else
+			snapper_set_drc(mix);
+	}
+	return change;
+}
+
+static int tumbler_get_drc_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->drc_enable;
+	return 0;
+}
+
+static int tumbler_put_drc_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->drc_enable != ucontrol->value.integer.value[0];
+	if (change) {
+		mix->drc_enable = !!ucontrol->value.integer.value[0];
+		if (chip->model == PMAC_TUMBLER)
+			tumbler_set_drc(mix);
+		else
+			snapper_set_drc(mix);
+	}
+	return change;
+}
+
+
+/*
+ * mono volumes
+ */
+
+struct tumbler_mono_vol {
+	int index;
+	int reg;
+	int bytes;
+	unsigned int max;
+	unsigned int *table;
+};
+
+static int tumbler_set_mono_volume(pmac_tumbler_t *mix, struct tumbler_mono_vol *info)
+{
+	unsigned char block[4];
+	unsigned int vol;
+	int i;
+  
+	if (! mix->i2c.client)
+		return -ENODEV;
+  
+	vol = mix->mono_vol[info->index];
+	if (vol >= info->max)
+		vol = info->max - 1;
+	vol = info->table[vol];
+	for (i = 0; i < info->bytes; i++)
+		block[i] = (vol >> ((info->bytes - i - 1) * 8)) & 0xff;
+	if (i2c_smbus_write_block_data(mix->i2c.client, info->reg,
+				       info->bytes, block) < 0) {
+		snd_printk("failed to set mono volume %d\n", info->index);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int tumbler_info_mono(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	struct tumbler_mono_vol *info = (struct tumbler_mono_vol *)kcontrol->private_value;
+
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = info->max - 1;
+	return 0;
+}
+
+static int tumbler_get_mono(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	struct tumbler_mono_vol *info = (struct tumbler_mono_vol *)kcontrol->private_value;
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->mono_vol[info->index];
+	return 0;
+}
+
+static int tumbler_put_mono(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	struct tumbler_mono_vol *info = (struct tumbler_mono_vol *)kcontrol->private_value;
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->mono_vol[info->index] != ucontrol->value.integer.value[0];
+	if (change) {
+		mix->mono_vol[info->index] = ucontrol->value.integer.value[0];
+		tumbler_set_mono_volume(mix, info);
+	}
+	return change;
+}
+
+/* TAS3001c mono volumes */
+static struct tumbler_mono_vol tumbler_pcm_vol_info = {
+	.index = VOL_IDX_PCM_MONO,
+	.reg = TAS_REG_PCM,
+	.bytes = 3,
+	.max = ARRAY_SIZE(mixer_volume_table),
+	.table = mixer_volume_table,
+};
+
+static struct tumbler_mono_vol tumbler_bass_vol_info = {
+	.index = VOL_IDX_BASS,
+	.reg = TAS_REG_BASS,
+	.bytes = 1,
+	.max = ARRAY_SIZE(bass_volume_table),
+	.table = bass_volume_table,
+};
+
+static struct tumbler_mono_vol tumbler_treble_vol_info = {
+	.index = VOL_IDX_TREBLE,
+	.reg = TAS_REG_TREBLE,
+	.bytes = 1,
+	.max = ARRAY_SIZE(treble_volume_table),
+	.table = treble_volume_table,
+};
+
+/* TAS3004 mono volumes */
+static struct tumbler_mono_vol snapper_bass_vol_info = {
+	.index = VOL_IDX_BASS,
+	.reg = TAS_REG_BASS,
+	.bytes = 1,
+	.max = ARRAY_SIZE(snapper_bass_volume_table),
+	.table = snapper_bass_volume_table,
+};
+
+static struct tumbler_mono_vol snapper_treble_vol_info = {
+	.index = VOL_IDX_TREBLE,
+	.reg = TAS_REG_TREBLE,
+	.bytes = 1,
+	.max = ARRAY_SIZE(snapper_treble_volume_table),
+	.table = snapper_treble_volume_table,
+};
+
+
+#define DEFINE_MONO(xname,type) { \
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,\
+	.name = xname, \
+	.info = tumbler_info_mono, \
+	.get = tumbler_get_mono, \
+	.put = tumbler_put_mono, \
+	.private_value = (unsigned long)(&tumbler_##type##_vol_info), \
+}
+
+#define DEFINE_SNAPPER_MONO(xname,type) { \
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,\
+	.name = xname, \
+	.info = tumbler_info_mono, \
+	.get = tumbler_get_mono, \
+	.put = tumbler_put_mono, \
+	.private_value = (unsigned long)(&snapper_##type##_vol_info), \
+}
+
+
+/*
+ * snapper mixer volumes
+ */
+
+static int snapper_set_mix_vol1(pmac_tumbler_t *mix, int idx, int ch, int reg)
+{
+	int i, j, vol;
+	unsigned char block[9];
+
+	vol = mix->mix_vol[idx][ch];
+	if (vol >= ARRAY_SIZE(mixer_volume_table)) {
+		vol = ARRAY_SIZE(mixer_volume_table) - 1;
+		mix->mix_vol[idx][ch] = vol;
+	}
+
+	for (i = 0; i < 3; i++) {
+		vol = mix->mix_vol[i][ch];
+		vol = mixer_volume_table[vol];
+		for (j = 0; j < 3; j++)
+			block[i * 3 + j] = (vol >> ((2 - j) * 8)) & 0xff;
+	}
+	if (i2c_smbus_write_block_data(mix->i2c.client, reg, 9, block) < 0) {
+		snd_printk("failed to set mono volume %d\n", reg);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int snapper_set_mix_vol(pmac_tumbler_t *mix, int idx)
+{
+	if (! mix->i2c.client)
+		return -ENODEV;
+	if (snapper_set_mix_vol1(mix, idx, 0, TAS_REG_LMIX) < 0 ||
+	    snapper_set_mix_vol1(mix, idx, 1, TAS_REG_RMIX) < 0)
+		return -EINVAL;
+	return 0;
+}
+
+static int snapper_info_mix(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = ARRAY_SIZE(mixer_volume_table) - 1;
+	return 0;
+}
+
+static int snapper_get_mix(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	int idx = (int)kcontrol->private_value;
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	ucontrol->value.integer.value[0] = mix->mix_vol[idx][0];
+	ucontrol->value.integer.value[1] = mix->mix_vol[idx][1];
+	return 0;
+}
+
+static int snapper_put_mix(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	int idx = (int)kcontrol->private_value;
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	int change;
+
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	change = mix->mix_vol[idx][0] != ucontrol->value.integer.value[0] ||
+		mix->mix_vol[idx][1] != ucontrol->value.integer.value[1];
+	if (change) {
+		mix->mix_vol[idx][0] = ucontrol->value.integer.value[0];
+		mix->mix_vol[idx][1] = ucontrol->value.integer.value[1];
+		snapper_set_mix_vol(mix, idx);
+	}
+	return change;
+}
+
+
+/*
+ * mute switches
+ */
+
+enum { TUMBLER_MUTE_HP, TUMBLER_MUTE_AMP };
+
+static int tumbler_get_mute_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	pmac_gpio_t *gp;
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	gp = (kcontrol->private_value == TUMBLER_MUTE_HP) ? &mix->hp_mute : &mix->amp_mute;
+	ucontrol->value.integer.value[0] = ! read_audio_gpio(gp);
+	return 0;
+}
+
+static int tumbler_put_mute_switch(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix;
+	pmac_gpio_t *gp;
+	int val;
+#ifdef PMAC_SUPPORT_AUTOMUTE
+	if (chip->update_automute && chip->auto_mute)
+		return 0; /* don't touch in the auto-mute mode */
+#endif	
+	if (! (mix = chip->mixer_data))
+		return -ENODEV;
+	gp = (kcontrol->private_value == TUMBLER_MUTE_HP) ? &mix->hp_mute : &mix->amp_mute;
+	val = ! read_audio_gpio(gp);
+	if (val != ucontrol->value.integer.value[0]) {
+		write_audio_gpio(gp, ! ucontrol->value.integer.value[0]);
+		return 1;
+	}
+	return 0;
+}
+
+static int snapper_set_capture_source(pmac_tumbler_t *mix)
+{
+	if (! mix->i2c.client)
+		return -ENODEV;
+	return i2c_smbus_write_byte_data(mix->i2c.client, TAS_REG_ACS,
+					 mix->capture_source ? 2 : 0);
+}
+
+static int snapper_info_capture_source(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
+{
+	static char *texts[2] = {
+		"Line", "Mic"
+	};
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
+	uinfo->count = 1;
+	uinfo->value.enumerated.items = 2;
+	if (uinfo->value.enumerated.item > 1)
+		uinfo->value.enumerated.item = 1;
+	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
+	return 0;
+}
+
+static int snapper_get_capture_source(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+
+	snd_assert(mix, return -ENODEV);
+	ucontrol->value.integer.value[0] = mix->capture_source;
+	return 0;
+}
+
+static int snapper_put_capture_source(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
+{
+	pmac_t *chip = snd_kcontrol_chip(kcontrol);
+	pmac_tumbler_t *mix = chip->mixer_data;
+	int change;
+
+	snd_assert(mix, return -ENODEV);
+	change = ucontrol->value.integer.value[0] != mix->capture_source;
+	if (change) {
+		mix->capture_source = !!ucontrol->value.integer.value[0];
+		snapper_set_capture_source(mix);
+	}
+	return change;
+}
+
+#define DEFINE_SNAPPER_MIX(xname,idx,ofs) { \
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,\
+	.name = xname, \
+	.info = snapper_info_mix, \
+	.get = snapper_get_mix, \
+	.put = snapper_put_mix, \
+	.index = idx,\
+	.private_value = ofs, \
+}
+
+
+/*
+ */
+static snd_kcontrol_new_t tumbler_mixers[] __initdata = {
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Master Playback Volume",
+	  .info = tumbler_info_master_volume,
+	  .get = tumbler_get_master_volume,
+	  .put = tumbler_put_master_volume
+	},
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Master Playback Switch",
+	  .info = snd_pmac_boolean_stereo_info,
+	  .get = tumbler_get_master_switch,
+	  .put = tumbler_put_master_switch
+	},
+	DEFINE_MONO("Tone Control - Bass", bass),
+	DEFINE_MONO("Tone Control - Treble", treble),
+	DEFINE_MONO("PCM Playback Volume", pcm),
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "DRC Range",
+	  .info = tumbler_info_drc_value,
+	  .get = tumbler_get_drc_value,
+	  .put = tumbler_put_drc_value
+	},
+};
+
+static snd_kcontrol_new_t snapper_mixers[] __initdata = {
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Master Playback Volume",
+	  .info = tumbler_info_master_volume,
+	  .get = tumbler_get_master_volume,
+	  .put = tumbler_put_master_volume
+	},
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Master Playback Switch",
+	  .info = snd_pmac_boolean_stereo_info,
+	  .get = tumbler_get_master_switch,
+	  .put = tumbler_put_master_switch
+	},
+	DEFINE_SNAPPER_MIX("PCM Playback Volume", 0, VOL_IDX_PCM),
+	DEFINE_SNAPPER_MIX("PCM Playback Volume", 1, VOL_IDX_PCM2),
+	DEFINE_SNAPPER_MIX("Monitor Mix Volume", 0, VOL_IDX_ADC),
+	DEFINE_SNAPPER_MONO("Tone Control - Bass", bass),
+	DEFINE_SNAPPER_MONO("Tone Control - Treble", treble),
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "DRC Range",
+	  .info = tumbler_info_drc_value,
+	  .get = tumbler_get_drc_value,
+	  .put = tumbler_put_drc_value
+	},
+	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	  .name = "Input Source", /* FIXME: "Capture Source" doesn't work properly */
+	  .info = snapper_info_capture_source,
+	  .get = snapper_get_capture_source,
+	  .put = snapper_put_capture_source
+	},
+};
+
+static snd_kcontrol_new_t tumbler_hp_sw __initdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "Headphone Playback Switch",
+	.info = snd_pmac_boolean_mono_info,
+	.get = tumbler_get_mute_switch,
+	.put = tumbler_put_mute_switch,
+	.private_value = TUMBLER_MUTE_HP,
+};
+static snd_kcontrol_new_t tumbler_speaker_sw __initdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "PC Speaker Playback Switch",
+	.info = snd_pmac_boolean_mono_info,
+	.get = tumbler_get_mute_switch,
+	.put = tumbler_put_mute_switch,
+	.private_value = TUMBLER_MUTE_AMP,
+};
+static snd_kcontrol_new_t tumbler_drc_sw __initdata = {
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name = "DRC Switch",
+	.info = snd_pmac_boolean_mono_info,
+	.get = tumbler_get_drc_switch,
+	.put = tumbler_put_drc_switch
+};
+
+
+#ifdef PMAC_SUPPORT_AUTOMUTE
+/*
+ * auto-mute stuffs
+ */
+static int tumbler_detect_headphone(pmac_t *chip)
+{
+	pmac_tumbler_t *mix = chip->mixer_data;
+	return read_audio_gpio(&mix->hp_detect);
+}
+
+static void check_mute(pmac_t *chip, pmac_gpio_t *gp, int val, int do_notify, snd_kcontrol_t *sw)
+{
+	//pmac_tumbler_t *mix = chip->mixer_data;
+	if (val != read_audio_gpio(gp)) {
+		write_audio_gpio(gp, val);
+		if (do_notify)
+			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &sw->id);
+	}
+}
+
+static struct work_struct device_change;
+
+static void
+device_change_handler(void *self)
+{
+	pmac_t *chip = (pmac_t*) self;
+	pmac_tumbler_t *mix;
+
+	if (!chip)
+		return;
+
+	mix = chip->mixer_data;
+
+	/* first set the DRC so the speaker do not explode -ReneR */
+	if (chip->model == PMAC_TUMBLER)
+		tumbler_set_drc(mix);
+	else
+		snapper_set_drc(mix);
+
+	/* reset the master volume so the correct amplification is applied */
+	tumbler_set_master_volume(mix);
+}
+
+static void tumbler_update_automute(pmac_t *chip, int do_notify)
+{
+	if (chip->auto_mute) {
+		pmac_tumbler_t *mix = chip->mixer_data;
+		snd_assert(mix, return);
+		if (tumbler_detect_headphone(chip)) {
+			/* mute speaker */
+			check_mute(chip, &mix->amp_mute, 1, do_notify, chip->speaker_sw_ctl);
+			check_mute(chip, &mix->hp_mute, 0, do_notify, chip->master_sw_ctl);
+			mix->drc_enable = 0;
+
+		} else {
+			/* unmute speaker */
+			check_mute(chip, &mix->amp_mute, 0, do_notify, chip->speaker_sw_ctl);
+			check_mute(chip, &mix->hp_mute, 1, do_notify, chip->master_sw_ctl);
+			mix->drc_enable = 1;
+		}
+		if (do_notify) {
+			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+				       &chip->hp_detect_ctl->id);
+			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
+			               &chip->drc_sw_ctl->id);
+		}
+
+		/* finally we need to schedule an update of the mixer values
+		   (master and DRC are enough for now) -ReneR */
+		schedule_work(&device_change);
+
+	}
+}
+#endif /* PMAC_SUPPORT_AUTOMUTE */
+
+
+/* interrupt - headphone plug changed */
+static irqreturn_t headphone_intr(int irq, void *devid, struct pt_regs *regs)
+{
+	pmac_t *chip = devid;
+	if (chip->update_automute && chip->initialized) {
+		chip->update_automute(chip, 1);
+		return IRQ_HANDLED;
+	}
+	return IRQ_NONE;
+}
+
+/* look for audio-gpio device */
+static struct device_node *find_audio_device(const char *name)
+{
+	struct device_node *np;
+  
+	if (! (np = find_devices("gpio")))
+		return NULL;
+  
+	for (np = np->child; np; np = np->sibling) {
+		char *property = get_property(np, "audio-gpio", NULL);
+		if (property && strcmp(property, name) == 0)
+			return np;
+	}  
+	return NULL;
+}
+
+/* look for audio-gpio device */
+static struct device_node *find_compatible_audio_device(const char *name)
+{
+	struct device_node *np;
+  
+	if (! (np = find_devices("gpio")))
+		return NULL;
+  
+	for (np = np->child; np; np = np->sibling) {
+		if (device_is_compatible(np, name))
+			return np;
+	}  
+	return NULL;
+}
+
+/* find an audio device and get its address */
+static unsigned long tumbler_find_device(const char *device, pmac_gpio_t *gp, int is_compatible)
+{
+	struct device_node *node;
+	u32 *base;
+
+	if (is_compatible)
+		node = find_compatible_audio_device(device);
+	else
+		node = find_audio_device(device);
+	if (! node) {
+		snd_printdd("cannot find device %s\n", device);
+		return -ENODEV;
+	}
+
+	base = (u32 *)get_property(node, "AAPL,address", NULL);
+	if (! base) {
+		snd_printd("cannot find address for device %s\n", device);
+		return -ENODEV;
+	}
+
+#ifdef CONFIG_PPC_HAS_FEATURE_CALLS
+	gp->addr = (*base) & 0x0000ffff;
+#else
+	gp->addr = ioremap((unsigned long)(*base), 1);
+#endif
+	base = (u32 *)get_property(node, "audio-gpio-active-state", NULL);
+	if (base)
+		gp->active_state = *base;
+	else
+		gp->active_state = 1;
+
+
+	return (node->n_intrs > 0) ? node->intrs[0].line : 0;
+}
+
+/* reset audio */
+static void tumbler_reset_audio(pmac_t *chip)
+{
+	pmac_tumbler_t *mix = chip->mixer_data;
+
+	write_audio_gpio(&mix->audio_reset, 0);
+	big_mdelay(200);
+	write_audio_gpio(&mix->audio_reset, 1);
+	big_mdelay(100);
+	write_audio_gpio(&mix->audio_reset, 0);
+	big_mdelay(100);
+}
+
+#ifdef CONFIG_PMAC_PBOOK
+/* resume mixer */
+static void tumbler_resume(pmac_t *chip)
+{
+	pmac_tumbler_t *mix = chip->mixer_data;
+
+	snd_assert(mix, return);
+
+	tumbler_reset_audio(chip);
+	if (mix->i2c.client && mix->i2c.init_client) {
+		if (mix->i2c.init_client(&mix->i2c) < 0)
+			printk(KERN_ERR "tumbler_init_client error\n");
+	} else
+		printk(KERN_ERR "tumbler: i2c is not initialized\n");
+	if (chip->model == PMAC_TUMBLER) {
+		tumbler_set_mono_volume(mix, &tumbler_pcm_vol_info);
+		tumbler_set_mono_volume(mix, &tumbler_bass_vol_info);
+		tumbler_set_mono_volume(mix, &tumbler_treble_vol_info);
+		tumbler_set_drc(mix);
+	} else {
+		snapper_set_mix_vol(mix, VOL_IDX_PCM);
+		snapper_set_mix_vol(mix, VOL_IDX_PCM2);
+		snapper_set_mix_vol(mix, VOL_IDX_ADC);
+		tumbler_set_mono_volume(mix, &snapper_bass_vol_info);
+		tumbler_set_mono_volume(mix, &snapper_treble_vol_info);
+		snapper_set_drc(mix);
+		snapper_set_capture_source(mix);
+	}
+	tumbler_set_master_volume(mix);
+	if (chip->update_automute)
+		chip->update_automute(chip, 0);
+}
+#endif
+
+/* initialize tumbler */
+static int __init tumbler_init(pmac_t *chip)
+{
+	int irq, err;
+	pmac_tumbler_t *mix = chip->mixer_data;
+	snd_assert(mix, return -EINVAL);
+
+	tumbler_find_device("audio-hw-reset", &mix->audio_reset, 0);
+	tumbler_find_device("amp-mute", &mix->amp_mute, 0);
+	tumbler_find_device("headphone-mute", &mix->hp_mute, 0);
+	irq = tumbler_find_device("headphone-detect", &mix->hp_detect, 0);
+	if (irq < 0)
+		irq = tumbler_find_device("keywest-gpio15", &mix->hp_detect, 1);
+
+	tumbler_reset_audio(chip);
+
+	/* activate headphone status interrupts */
+  	if (irq >= 0) {
+		unsigned char val;
+		if ((err = request_irq(irq, headphone_intr, 0,
+				       "Tumbler Headphone Detection", chip)) < 0)
+			return err;
+		/* activate headphone status interrupts */
+		val = do_gpio_read(&mix->hp_detect);
+		do_gpio_write(&mix->hp_detect, val | 0x80);
+	}
+	mix->headphone_irq = irq;
+  
+	return 0;
+}
+
+static void tumbler_cleanup(pmac_t *chip)
+{
+	pmac_tumbler_t *mix = chip->mixer_data;
+	if (! mix)
+		return;
+
+	if (mix->headphone_irq >= 0)
+		free_irq(mix->headphone_irq, chip);
+	tumbler_gpio_free(&mix->audio_reset);
+	tumbler_gpio_free(&mix->amp_mute);
+	tumbler_gpio_free(&mix->hp_mute);
+	tumbler_gpio_free(&mix->hp_detect);
+	snd_pmac_keywest_cleanup(&mix->i2c);
+	kfree(mix);
+	chip->mixer_data = NULL;
+}
+
+/* exported */
+int __init snd_pmac_tumbler_init(pmac_t *chip)
+{
+	int i, err;
+	pmac_tumbler_t *mix;
+	u32 *paddr;
+	struct device_node *tas_node;
+	char *chipname;
+
+#ifdef CONFIG_KMOD
+	if (current->fs->root)
+		request_module("i2c-keywest");
+#endif /* CONFIG_KMOD */	
+
+	mix = kmalloc(sizeof(*mix), GFP_KERNEL);
+	if (! mix)
+		return -ENOMEM;
+	memset(mix, 0, sizeof(*mix));
+	mix->headphone_irq = -1;
+
+	chip->mixer_data = mix;
+	chip->mixer_free = tumbler_cleanup;
+
+	if ((err = tumbler_init(chip)) < 0)
+		return err;
+
+	/* set up TAS */
+	tas_node = find_devices("deq");
+	if (tas_node == NULL)
+		return -ENODEV;
+
+	paddr = (u32 *)get_property(tas_node, "i2c-address", NULL);
+	if (paddr)
+		mix->i2c.addr = (*paddr) >> 1;
+	else
+		mix->i2c.addr = TAS_I2C_ADDR;
+
+	if (chip->model == PMAC_TUMBLER) {
+		mix->i2c.init_client = tumbler_init_client;
+		mix->i2c.name = "TAS3001c";
+		chipname = "Tumbler";
+	} else {
+		mix->i2c.init_client = snapper_init_client;
+		mix->i2c.name = "TAS3004";
+		chipname = "Snapper";
+	}
+
+	if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
+		return err;
+
+	/*
+	 * build mixers
+	 */
+	sprintf(chip->card->mixername, "PowerMac %s", chipname);
+
+	if (chip->model == PMAC_TUMBLER) {
+		for (i = 0; i < ARRAY_SIZE(tumbler_mixers); i++) {
+			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&tumbler_mixers[i], chip))) < 0)
+				return err;
+		}
+	} else {
+		for (i = 0; i < ARRAY_SIZE(snapper_mixers); i++) {
+			if ((err = snd_ctl_add(chip->card, snd_ctl_new1(&snapper_mixers[i], chip))) < 0)
+				return err;
+		}
+	}
+	chip->master_sw_ctl = snd_ctl_new1(&tumbler_hp_sw, chip);
+	if ((err = snd_ctl_add(chip->card, chip->master_sw_ctl)) < 0)
+		return err;
+	chip->speaker_sw_ctl = snd_ctl_new1(&tumbler_speaker_sw, chip);
+	if ((err = snd_ctl_add(chip->card, chip->speaker_sw_ctl)) < 0)
+		return err;
+	chip->drc_sw_ctl = snd_ctl_new1(&tumbler_drc_sw, chip);
+	if ((err = snd_ctl_add(chip->card, chip->drc_sw_ctl)) < 0)
+		return err;
+
+
+#ifdef CONFIG_PMAC_PBOOK
+	chip->resume = tumbler_resume;
+#endif
+
+	INIT_WORK(&device_change, device_change_handler, (void *)chip);
+
+#ifdef PMAC_SUPPORT_AUTOMUTE
+	if (mix->headphone_irq >=0 && (err = snd_pmac_add_automute(chip)) < 0)
+		return err;
+	chip->detect_headphone = tumbler_detect_headphone;
+	chip->update_automute = tumbler_update_automute;
+	tumbler_update_automute(chip, 0); /* update the status only */
+#endif
+
+	return 0;
+}