sound/pci/ice1712/revo.c - kernel/msm - Gitiles

 /*
  *   ALSA driver for ICEnsemble ICE1712 (Envy24)
  *
  *   Lowlevel functions for M-Audio Revolution 7.1
  *
  *	Copyright (c) 2003 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
  *
  */

 #include <asm/io.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <sound/core.h>

 #include "ice1712.h"
 #include "envy24ht.h"
 #include "revo.h"

 /* a non-standard I2C device for revo51 */
 struct revo51_spec {
 	struct snd_i2c_device *dev;
 	struct snd_pt2258 *pt2258;
 } revo51;

 static void revo_i2s_mclk_changed(struct snd_ice1712 *ice)
 {
 	/* assert PRST# to converters; MT05 bit 7 */
 	outb(inb(ICEMT1724(ice, AC97_CMD)) | 0x80, ICEMT1724(ice, AC97_CMD));
 	mdelay(5);
 	/* deassert PRST# */
 	outb(inb(ICEMT1724(ice, AC97_CMD)) & ~0x80, ICEMT1724(ice, AC97_CMD));
 }

 /*
  * change the rate of envy24HT, AK4355 and AK4381
  */
 static void revo_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
 {
 	unsigned char old, tmp, dfs;
 	int reg, shift;

 	if (rate == 0)	/* no hint - S/PDIF input is master, simply return */
 		return;

 	/* adjust DFS on codecs */
 	if (rate > 96000)
 		dfs = 2;
 	else if (rate > 48000)
 		dfs = 1;
 	else
 		dfs = 0;

 	if (ak->type == SND_AK4355 || ak->type == SND_AK4358) {
 		reg = 2;
 		shift = 4;
 	} else {
 		reg = 1;
 		shift = 3;
 	}
 	tmp = snd_akm4xxx_get(ak, 0, reg);
 	old = (tmp >> shift) & 0x03;
 	if (old == dfs)
 		return;

 	/* reset DFS */
 	snd_akm4xxx_reset(ak, 1);
 	tmp = snd_akm4xxx_get(ak, 0, reg);
 	tmp &= ~(0x03 << shift);
 	tmp |= dfs << shift;
 	// snd_akm4xxx_write(ak, 0, reg, tmp);
 	snd_akm4xxx_set(ak, 0, reg, tmp); /* the value is written in reset(0) */
 	snd_akm4xxx_reset(ak, 0);
 }

 /*
  * I2C access to the PT2258 volume controller on GPIO 6/7 (Revolution 5.1)
  */

 static void revo_i2c_start(struct snd_i2c_bus *bus)
 {
 	struct snd_ice1712 *ice = bus->private_data;
 	snd_ice1712_save_gpio_status(ice);
 }

 static void revo_i2c_stop(struct snd_i2c_bus *bus)
 {
 	struct snd_ice1712 *ice = bus->private_data;
 	snd_ice1712_restore_gpio_status(ice);
 }

 static void revo_i2c_direction(struct snd_i2c_bus *bus, int clock, int data)
 {
 	struct snd_ice1712 *ice = bus->private_data;
 	unsigned int mask, val;

 	val = 0;
 	if (clock)
 		val |= VT1724_REVO_I2C_CLOCK;	/* write SCL */
 	if (data)
 		val |= VT1724_REVO_I2C_DATA;	/* write SDA */
 	mask = VT1724_REVO_I2C_CLOCK | VT1724_REVO_I2C_DATA;
 	ice->gpio.direction &= ~mask;
 	ice->gpio.direction |= val;
 	snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
 	snd_ice1712_gpio_set_mask(ice, ~mask);
 }

 static void revo_i2c_setlines(struct snd_i2c_bus *bus, int clk, int data)
 {
 	struct snd_ice1712 *ice = bus->private_data;
 	unsigned int val = 0;

 	if (clk)
 		val |= VT1724_REVO_I2C_CLOCK;
 	if (data)
 		val |= VT1724_REVO_I2C_DATA;
 	snd_ice1712_gpio_write_bits(ice,
 				    VT1724_REVO_I2C_DATA |
 				    VT1724_REVO_I2C_CLOCK, val);
 	udelay(5);
 }

 static int revo_i2c_getdata(struct snd_i2c_bus *bus, int ack)
 {
 	struct snd_ice1712 *ice = bus->private_data;
 	int bit;

 	if (ack)
 		udelay(5);
 	bit = snd_ice1712_gpio_read_bits(ice, VT1724_REVO_I2C_DATA) ? 1 : 0;
 	return bit;
 }

 static struct snd_i2c_bit_ops revo51_bit_ops = {
 	.start = revo_i2c_start,
 	.stop = revo_i2c_stop,
 	.direction = revo_i2c_direction,
 	.setlines = revo_i2c_setlines,
 	.getdata = revo_i2c_getdata,
 };

 static int revo51_i2c_init(struct snd_ice1712 *ice,
 			   struct snd_pt2258 *pt)
 {
 	struct revo51_spec *spec;
 	int err;

 	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
 	if (!spec)
 		return -ENOMEM;
 	ice->spec = spec;

 	/* create the I2C bus */
 	err = snd_i2c_bus_create(ice->card, "ICE1724 GPIO6", NULL, &ice->i2c);
 	if (err < 0)
 		return err;

 	ice->i2c->private_data = ice;
 	ice->i2c->hw_ops.bit = &revo51_bit_ops;

 	/* create the I2C device */
 	err = snd_i2c_device_create(ice->i2c, "PT2258", 0x40, &spec->dev);
 	if (err < 0)
 		return err;

 	pt->card = ice->card;
 	pt->i2c_bus = ice->i2c;
 	pt->i2c_dev = spec->dev;
 	spec->pt2258 = pt;

 	snd_pt2258_reset(pt);

 	return 0;
 }

 /*
  * initialize the chips on M-Audio Revolution cards
  */

 #define AK_DAC(xname,xch) { .name = xname, .num_channels = xch }

 static const struct snd_akm4xxx_dac_channel revo71_front[] = {
 	{
 		.name = "PCM Playback Volume",
 		.num_channels = 2,
 		/* front channels DAC supports muting */
 		.switch_name = "PCM Playback Switch",
 	},
 };

 static const struct snd_akm4xxx_dac_channel revo71_surround[] = {
 	AK_DAC("PCM Center Playback Volume", 1),
 	AK_DAC("PCM LFE Playback Volume", 1),
 	AK_DAC("PCM Side Playback Volume", 2),
 	AK_DAC("PCM Rear Playback Volume", 2),
 };

 static const struct snd_akm4xxx_dac_channel revo51_dac[] = {
 	AK_DAC("PCM Playback Volume", 2),
 	AK_DAC("PCM Center Playback Volume", 1),
 	AK_DAC("PCM LFE Playback Volume", 1),
 	AK_DAC("PCM Rear Playback Volume", 2),
 };

 static const char *revo51_adc_input_names[] = {
 	"Mic",
 	"Line",
 	"CD",
 	NULL
 };

 static const struct snd_akm4xxx_adc_channel revo51_adc[] = {
 	{
 		.name = "PCM Capture Volume",
 		.switch_name = "PCM Capture Switch",
 		.num_channels = 2,
 		.input_names = revo51_adc_input_names
 	},
 };

 static struct snd_akm4xxx akm_revo_front __devinitdata = {
 	.type = SND_AK4381,
 	.num_dacs = 2,
 	.ops = {
 		.set_rate_val = revo_set_rate_val
 	},
 	.dac_info = revo71_front,
 };

 static struct snd_ak4xxx_private akm_revo_front_priv __devinitdata = {
 	.caddr = 1,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
 	.clk_mask = VT1724_REVO_CCLK,
 	.cs_mask = VT1724_REVO_CS0 | VT1724_REVO_CS1 | VT1724_REVO_CS2,
 	.cs_addr = VT1724_REVO_CS0 | VT1724_REVO_CS2,
 	.cs_none = VT1724_REVO_CS0 | VT1724_REVO_CS1 | VT1724_REVO_CS2,
 	.add_flags = VT1724_REVO_CCLK, /* high at init */
 	.mask_flags = 0,
 };

 static struct snd_akm4xxx akm_revo_surround __devinitdata = {
 	.type = SND_AK4355,
 	.idx_offset = 1,
 	.num_dacs = 6,
 	.ops = {
 		.set_rate_val = revo_set_rate_val
 	},
 	.dac_info = revo71_surround,
 };

 static struct snd_ak4xxx_private akm_revo_surround_priv __devinitdata = {
 	.caddr = 3,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
 	.clk_mask = VT1724_REVO_CCLK,
 	.cs_mask = VT1724_REVO_CS0 | VT1724_REVO_CS1 | VT1724_REVO_CS2,
 	.cs_addr = VT1724_REVO_CS0 | VT1724_REVO_CS1,
 	.cs_none = VT1724_REVO_CS0 | VT1724_REVO_CS1 | VT1724_REVO_CS2,
 	.add_flags = VT1724_REVO_CCLK, /* high at init */
 	.mask_flags = 0,
 };

 static struct snd_akm4xxx akm_revo51 __devinitdata = {
 	.type = SND_AK4358,
 	.num_dacs = 6,
 	.ops = {
 		.set_rate_val = revo_set_rate_val
 	},
 	.dac_info = revo51_dac,
 };

 static struct snd_ak4xxx_private akm_revo51_priv __devinitdata = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
 	.clk_mask = VT1724_REVO_CCLK,
 	.cs_mask = VT1724_REVO_CS0 | VT1724_REVO_CS1,
 	.cs_addr = VT1724_REVO_CS1,
 	.cs_none = VT1724_REVO_CS0 | VT1724_REVO_CS1,
 	.add_flags = VT1724_REVO_CCLK, /* high at init */
 	.mask_flags = 0,
 };

 static struct snd_akm4xxx akm_revo51_adc __devinitdata = {
 	.type = SND_AK5365,
 	.num_adcs = 2,
 	.adc_info = revo51_adc,
 };

 static struct snd_ak4xxx_private akm_revo51_adc_priv __devinitdata = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
 	.clk_mask = VT1724_REVO_CCLK,
 	.cs_mask = VT1724_REVO_CS0 | VT1724_REVO_CS1,
 	.cs_addr = VT1724_REVO_CS0,
 	.cs_none = VT1724_REVO_CS0 | VT1724_REVO_CS1,
 	.add_flags = VT1724_REVO_CCLK, /* high at init */
 	.mask_flags = 0,
 };

 static struct snd_pt2258 ptc_revo51_volume;

 /* AK4358 for AP192 DAC, AK5385A for ADC */
 static void ap192_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
 {
 	struct snd_ice1712 *ice = ak->private_data[0];

 	revo_set_rate_val(ak, rate);

 #if 1 /* FIXME: do we need this procedure? */
 	/* reset DFS pin of AK5385A for ADC, too */
 	/* DFS0 (pin 18) -- GPIO10 pin 77 */
 	snd_ice1712_save_gpio_status(ice);
 	snd_ice1712_gpio_write_bits(ice, 1 << 10,
 				    rate > 48000 ? (1 << 10) : 0);
 	snd_ice1712_restore_gpio_status(ice);
 #endif
 }

 static const struct snd_akm4xxx_dac_channel ap192_dac[] = {
 	AK_DAC("PCM Playback Volume", 2)
 };

 static struct snd_akm4xxx akm_ap192 __devinitdata = {
 	.type = SND_AK4358,
 	.num_dacs = 2,
 	.ops = {
 		.set_rate_val = ap192_set_rate_val
 	},
 	.dac_info = ap192_dac,
 };

 static struct snd_ak4xxx_private akm_ap192_priv __devinitdata = {
 	.caddr = 2,
 	.cif = 0,
 	.data_mask = VT1724_REVO_CDOUT,
 	.clk_mask = VT1724_REVO_CCLK,
 	.cs_mask = VT1724_REVO_CS0 | VT1724_REVO_CS3,
 	.cs_addr = VT1724_REVO_CS3,
 	.cs_none = VT1724_REVO_CS0 | VT1724_REVO_CS3,
 	.add_flags = VT1724_REVO_CCLK, /* high at init */
 	.mask_flags = 0,
 };

 #if 0
 /* FIXME: ak4114 makes the sound much lower due to some confliction,
  *        so let's disable it right now...
  */
 #define BUILD_AK4114_AP192
 #endif

 #ifdef BUILD_AK4114_AP192
 /* AK4114 support on Audiophile 192 */
 /* CDTO (pin 32) -- GPIO2 pin 52
  * CDTI (pin 33) -- GPIO3 pin 53 (shared with AK4358)
  * CCLK (pin 34) -- GPIO1 pin 51 (shared with AK4358)
  * CSN  (pin 35) -- GPIO7 pin 59
  */
 #define AK4114_ADDR	0x00

 static void write_data(struct snd_ice1712 *ice, unsigned int gpio,
 		       unsigned int data, int idx)
 {
 	for (; idx >= 0; idx--) {
 		/* drop clock */
 		gpio &= ~VT1724_REVO_CCLK;
 		snd_ice1712_gpio_write(ice, gpio);
 		udelay(1);
 		/* set data */
 		if (data & (1 << idx))
 			gpio |= VT1724_REVO_CDOUT;
 		else
 			gpio &= ~VT1724_REVO_CDOUT;
 		snd_ice1712_gpio_write(ice, gpio);
 		udelay(1);
 		/* raise clock */
 		gpio |= VT1724_REVO_CCLK;
 		snd_ice1712_gpio_write(ice, gpio);
 		udelay(1);
 	}
 }

 static unsigned char read_data(struct snd_ice1712 *ice, unsigned int gpio,
 			       int idx)
 {
 	unsigned char data = 0;

 	for (; idx >= 0; idx--) {
 		/* drop clock */
 		gpio &= ~VT1724_REVO_CCLK;
 		snd_ice1712_gpio_write(ice, gpio);
 		udelay(1);
 		/* read data */
 		if (snd_ice1712_gpio_read(ice) & VT1724_REVO_CDIN)
 			data |= (1 << idx);
 		udelay(1);
 		/* raise clock */
 		gpio |= VT1724_REVO_CCLK;
 		snd_ice1712_gpio_write(ice, gpio);
 		udelay(1);
 	}
 	return data;
 }

 static unsigned int ap192_4wire_start(struct snd_ice1712 *ice)
 {
 	unsigned int tmp;

 	snd_ice1712_save_gpio_status(ice);
 	tmp = snd_ice1712_gpio_read(ice);
 	tmp |= VT1724_REVO_CCLK; /* high at init */
 	tmp |= VT1724_REVO_CS0;
 	tmp &= ~VT1724_REVO_CS3;
 	snd_ice1712_gpio_write(ice, tmp);
 	udelay(1);
 	return tmp;
 }

 static void ap192_4wire_finish(struct snd_ice1712 *ice, unsigned int tmp)
 {
 	tmp |= VT1724_REVO_CS3;
 	tmp |= VT1724_REVO_CS0;
 	snd_ice1712_gpio_write(ice, tmp);
 	udelay(1);
 	snd_ice1712_restore_gpio_status(ice);
 }

 static void ap192_ak4114_write(void *private_data, unsigned char addr,
 			       unsigned char data)
 {
 	struct snd_ice1712 *ice = private_data;
 	unsigned int tmp, addrdata;

 	tmp = ap192_4wire_start(ice);
 	addrdata = (AK4114_ADDR << 6) | 0x20 | (addr & 0x1f);
 	addrdata = (addrdata << 8) | data;
 	write_data(ice, tmp, addrdata, 15);
 	ap192_4wire_finish(ice, tmp);
 }

 static unsigned char ap192_ak4114_read(void *private_data, unsigned char addr)
 {
 	struct snd_ice1712 *ice = private_data;
 	unsigned int tmp;
 	unsigned char data;

 	tmp = ap192_4wire_start(ice);
 	write_data(ice, tmp, (AK4114_ADDR << 6) | (addr & 0x1f), 7);
 	data = read_data(ice, tmp, 7);
 	ap192_4wire_finish(ice, tmp);
 	return data;
 }

 static int __devinit ap192_ak4114_init(struct snd_ice1712 *ice)
 {
 	static const unsigned char ak4114_init_vals[] = {
 		AK4114_RST | AK4114_PWN | AK4114_OCKS0 | AK4114_OCKS1,
 		AK4114_DIF_I24I2S,
 		AK4114_TX1E,
 		AK4114_EFH_1024 | AK4114_DIT | AK4114_IPS(1),
 		0,
 		0
 	};
 	static const unsigned char ak4114_init_txcsb[] = {
 		0x41, 0x02, 0x2c, 0x00, 0x00
 	};
 	struct ak4114 *ak;
 	int err;

 	return snd_ak4114_create(ice->card,
 				 ap192_ak4114_read,
 				 ap192_ak4114_write,
 				 ak4114_init_vals, ak4114_init_txcsb,
 				 ice, &ak);
 }
 #endif /* BUILD_AK4114_AP192 */

 static int __devinit revo_init(struct snd_ice1712 *ice)
 {
 	struct snd_akm4xxx *ak;
 	int err;

 	/* determine I2C, DACs and ADCs */
 	switch (ice->eeprom.subvendor) {
 	case VT1724_SUBDEVICE_REVOLUTION71:
 		ice->num_total_dacs = 8;
 		ice->num_total_adcs = 2;
 		ice->gpio.i2s_mclk_changed = revo_i2s_mclk_changed;
 		break;
 	case VT1724_SUBDEVICE_REVOLUTION51:
 		ice->num_total_dacs = 6;
 		ice->num_total_adcs = 2;
 		break;
 	case VT1724_SUBDEVICE_AUDIOPHILE192:
 		ice->num_total_dacs = 2;
 		ice->num_total_adcs = 2;
 		break;
 	default:
 		snd_BUG();
 		return -EINVAL;
 	}

 	/* second stage of initialization, analog parts and others */
 	ak = ice->akm = kcalloc(2, sizeof(struct snd_akm4xxx), GFP_KERNEL);
 	if (! ak)
 		return -ENOMEM;
 	ice->akm_codecs = 2;
 	switch (ice->eeprom.subvendor) {
 	case VT1724_SUBDEVICE_REVOLUTION71:
 		ice->akm_codecs = 2;
 		if ((err = snd_ice1712_akm4xxx_init(ak, &akm_revo_front, &akm_revo_front_priv, ice)) < 0)
 			return err;
 		if ((err = snd_ice1712_akm4xxx_init(ak + 1, &akm_revo_surround, &akm_revo_surround_priv, ice)) < 0)
 			return err;
 		/* unmute all codecs */
 		snd_ice1712_gpio_write_bits(ice, VT1724_REVO_MUTE, VT1724_REVO_MUTE);
 		break;
 	case VT1724_SUBDEVICE_REVOLUTION51:
 		ice->akm_codecs = 2;
 		err = snd_ice1712_akm4xxx_init(ak, &akm_revo51,
 					       &akm_revo51_priv, ice);
 		if (err < 0)
 			return err;
 		err = snd_ice1712_akm4xxx_init(ak+1, &akm_revo51_adc,
 					       &akm_revo51_adc_priv, ice);
 		if (err < 0)
 			return err;
 		err = revo51_i2c_init(ice, &ptc_revo51_volume);
 		if (err < 0)
 			return err;
 		/* unmute all codecs */
 		snd_ice1712_gpio_write_bits(ice, VT1724_REVO_MUTE,
 					    VT1724_REVO_MUTE);
 		break;
 	case VT1724_SUBDEVICE_AUDIOPHILE192:
 		ice->akm_codecs = 1;
 		err = snd_ice1712_akm4xxx_init(ak, &akm_ap192, &akm_ap192_priv,
 					       ice);
 		if (err < 0)
 			return err;

 		break;
 	}

 	return 0;
 }


 static int __devinit revo_add_controls(struct snd_ice1712 *ice)
 {
 	struct revo51_spec *spec;
 	int err;

 	switch (ice->eeprom.subvendor) {
 	case VT1724_SUBDEVICE_REVOLUTION71:
 		err = snd_ice1712_akm4xxx_build_controls(ice);
 		if (err < 0)
 			return err;
 		break;
 	case VT1724_SUBDEVICE_REVOLUTION51:
 		err = snd_ice1712_akm4xxx_build_controls(ice);
 		if (err < 0)
 			return err;
 		spec = ice->spec;
 		err = snd_pt2258_build_controls(spec->pt2258);
 		if (err < 0)
 			return err;
 		break;
 	case VT1724_SUBDEVICE_AUDIOPHILE192:
 		err = snd_ice1712_akm4xxx_build_controls(ice);
 		if (err < 0)
 			return err;
 #ifdef BUILD_AK4114_AP192
 		err = ap192_ak4114_init(ice);
 		if (err < 0)
 			return err;
 #endif
 		break;
 	}
 	return 0;
 }

 /* entry point */
 struct snd_ice1712_card_info snd_vt1724_revo_cards[] __devinitdata = {
 	{
 		.subvendor = VT1724_SUBDEVICE_REVOLUTION71,
 		.name = "M Audio Revolution-7.1",
 		.model = "revo71",
 		.chip_init = revo_init,
 		.build_controls = revo_add_controls,
 	},
 	{
 		.subvendor = VT1724_SUBDEVICE_REVOLUTION51,
 		.name = "M Audio Revolution-5.1",
 		.model = "revo51",
 		.chip_init = revo_init,
 		.build_controls = revo_add_controls,
 	},
 	{
 		.subvendor = VT1724_SUBDEVICE_AUDIOPHILE192,
 		.name = "M Audio Audiophile192",
 		.model = "ap192",
 		.chip_init = revo_init,
 		.build_controls = revo_add_controls,
 	},
 	{ } /* terminator */
 };
	/*
	* ALSA driver for ICEnsemble ICE1712 (Envy24)
	*
	* Lowlevel functions for M-Audio Revolution 7.1
	*
	* Copyright (c) 2003 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
	*
	*/

	#include <asm/io.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <sound/core.h>

	#include "ice1712.h"
	#include "envy24ht.h"
	#include "revo.h"

	/* a non-standard I2C device for revo51 */
	struct revo51_spec {
	struct snd_i2c_device *dev;
	struct snd_pt2258 *pt2258;
	} revo51;

	static void revo_i2s_mclk_changed(struct snd_ice1712 *ice)
	{
	/* assert PRST# to converters; MT05 bit 7 */
	outb(inb(ICEMT1724(ice, AC97_CMD)) \| 0x80, ICEMT1724(ice, AC97_CMD));
	mdelay(5);
	/* deassert PRST# */
	outb(inb(ICEMT1724(ice, AC97_CMD)) & ~0x80, ICEMT1724(ice, AC97_CMD));
	}

	/*
	* change the rate of envy24HT, AK4355 and AK4381
	*/
	static void revo_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
	{
	unsigned char old, tmp, dfs;
	int reg, shift;

	if (rate == 0) /* no hint - S/PDIF input is master, simply return */
	return;

	/* adjust DFS on codecs */
	if (rate > 96000)
	dfs = 2;
	else if (rate > 48000)
	dfs = 1;
	else
	dfs = 0;

	if (ak->type == SND_AK4355 \|\| ak->type == SND_AK4358) {
	reg = 2;
	shift = 4;
	} else {
	reg = 1;
	shift = 3;
	}
	tmp = snd_akm4xxx_get(ak, 0, reg);
	old = (tmp >> shift) & 0x03;
	if (old == dfs)
	return;

	/* reset DFS */
	snd_akm4xxx_reset(ak, 1);
	tmp = snd_akm4xxx_get(ak, 0, reg);
	tmp &= ~(0x03 << shift);
	tmp \|= dfs << shift;
	// snd_akm4xxx_write(ak, 0, reg, tmp);
	snd_akm4xxx_set(ak, 0, reg, tmp); /* the value is written in reset(0) */
	snd_akm4xxx_reset(ak, 0);
	}

	/*
	* I2C access to the PT2258 volume controller on GPIO 6/7 (Revolution 5.1)
	*/

	static void revo_i2c_start(struct snd_i2c_bus *bus)
	{
	struct snd_ice1712 *ice = bus->private_data;
	snd_ice1712_save_gpio_status(ice);
	}

	static void revo_i2c_stop(struct snd_i2c_bus *bus)
	{
	struct snd_ice1712 *ice = bus->private_data;
	snd_ice1712_restore_gpio_status(ice);
	}

	static void revo_i2c_direction(struct snd_i2c_bus *bus, int clock, int data)
	{
	struct snd_ice1712 *ice = bus->private_data;
	unsigned int mask, val;

	val = 0;
	if (clock)
	val \|= VT1724_REVO_I2C_CLOCK; /* write SCL */
	if (data)
	val \|= VT1724_REVO_I2C_DATA; /* write SDA */
	mask = VT1724_REVO_I2C_CLOCK \| VT1724_REVO_I2C_DATA;
	ice->gpio.direction &= ~mask;
	ice->gpio.direction \|= val;
	snd_ice1712_gpio_set_dir(ice, ice->gpio.direction);
	snd_ice1712_gpio_set_mask(ice, ~mask);
	}

	static void revo_i2c_setlines(struct snd_i2c_bus *bus, int clk, int data)
	{
	struct snd_ice1712 *ice = bus->private_data;
	unsigned int val = 0;

	if (clk)
	val \|= VT1724_REVO_I2C_CLOCK;
	if (data)
	val \|= VT1724_REVO_I2C_DATA;
	snd_ice1712_gpio_write_bits(ice,
	VT1724_REVO_I2C_DATA \|
	VT1724_REVO_I2C_CLOCK, val);
	udelay(5);
	}

	static int revo_i2c_getdata(struct snd_i2c_bus *bus, int ack)
	{
	struct snd_ice1712 *ice = bus->private_data;
	int bit;

	if (ack)
	udelay(5);
	bit = snd_ice1712_gpio_read_bits(ice, VT1724_REVO_I2C_DATA) ? 1 : 0;
	return bit;
	}

	static struct snd_i2c_bit_ops revo51_bit_ops = {
	.start = revo_i2c_start,
	.stop = revo_i2c_stop,
	.direction = revo_i2c_direction,
	.setlines = revo_i2c_setlines,
	.getdata = revo_i2c_getdata,
	};

	static int revo51_i2c_init(struct snd_ice1712 *ice,
	struct snd_pt2258 *pt)
	{
	struct revo51_spec *spec;
	int err;

	spec = kzalloc(sizeof(*spec), GFP_KERNEL);
	if (!spec)
	return -ENOMEM;
	ice->spec = spec;

	/* create the I2C bus */
	err = snd_i2c_bus_create(ice->card, "ICE1724 GPIO6", NULL, &ice->i2c);
	if (err < 0)
	return err;

	ice->i2c->private_data = ice;
	ice->i2c->hw_ops.bit = &revo51_bit_ops;

	/* create the I2C device */
	err = snd_i2c_device_create(ice->i2c, "PT2258", 0x40, &spec->dev);
	if (err < 0)
	return err;

	pt->card = ice->card;
	pt->i2c_bus = ice->i2c;
	pt->i2c_dev = spec->dev;
	spec->pt2258 = pt;

	snd_pt2258_reset(pt);

	return 0;
	}

	/*
	* initialize the chips on M-Audio Revolution cards
	*/

	#define AK_DAC(xname,xch) { .name = xname, .num_channels = xch }

	static const struct snd_akm4xxx_dac_channel revo71_front[] = {
	{
	.name = "PCM Playback Volume",
	.num_channels = 2,
	/* front channels DAC supports muting */
	.switch_name = "PCM Playback Switch",
	},
	};

	static const struct snd_akm4xxx_dac_channel revo71_surround[] = {
	AK_DAC("PCM Center Playback Volume", 1),
	AK_DAC("PCM LFE Playback Volume", 1),
	AK_DAC("PCM Side Playback Volume", 2),
	AK_DAC("PCM Rear Playback Volume", 2),
	};

	static const struct snd_akm4xxx_dac_channel revo51_dac[] = {
	AK_DAC("PCM Playback Volume", 2),
	AK_DAC("PCM Center Playback Volume", 1),
	AK_DAC("PCM LFE Playback Volume", 1),
	AK_DAC("PCM Rear Playback Volume", 2),
	};

	static const char *revo51_adc_input_names[] = {
	"Mic",
	"Line",
	"CD",
	NULL
	};

	static const struct snd_akm4xxx_adc_channel revo51_adc[] = {
	{
	.name = "PCM Capture Volume",
	.switch_name = "PCM Capture Switch",
	.num_channels = 2,
	.input_names = revo51_adc_input_names
	},
	};

	static struct snd_akm4xxx akm_revo_front __devinitdata = {
	.type = SND_AK4381,
	.num_dacs = 2,
	.ops = {
	.set_rate_val = revo_set_rate_val
	},
	.dac_info = revo71_front,
	};

	static struct snd_ak4xxx_private akm_revo_front_priv __devinitdata = {
	.caddr = 1,
	.cif = 0,
	.data_mask = VT1724_REVO_CDOUT,
	.clk_mask = VT1724_REVO_CCLK,
	.cs_mask = VT1724_REVO_CS0 \| VT1724_REVO_CS1 \| VT1724_REVO_CS2,
	.cs_addr = VT1724_REVO_CS0 \| VT1724_REVO_CS2,
	.cs_none = VT1724_REVO_CS0 \| VT1724_REVO_CS1 \| VT1724_REVO_CS2,
	.add_flags = VT1724_REVO_CCLK, /* high at init */
	.mask_flags = 0,
	};

	static struct snd_akm4xxx akm_revo_surround __devinitdata = {
	.type = SND_AK4355,
	.idx_offset = 1,
	.num_dacs = 6,
	.ops = {
	.set_rate_val = revo_set_rate_val
	},
	.dac_info = revo71_surround,
	};

	static struct snd_ak4xxx_private akm_revo_surround_priv __devinitdata = {
	.caddr = 3,
	.cif = 0,
	.data_mask = VT1724_REVO_CDOUT,
	.clk_mask = VT1724_REVO_CCLK,
	.cs_mask = VT1724_REVO_CS0 \| VT1724_REVO_CS1 \| VT1724_REVO_CS2,
	.cs_addr = VT1724_REVO_CS0 \| VT1724_REVO_CS1,
	.cs_none = VT1724_REVO_CS0 \| VT1724_REVO_CS1 \| VT1724_REVO_CS2,
	.add_flags = VT1724_REVO_CCLK, /* high at init */
	.mask_flags = 0,
	};

	static struct snd_akm4xxx akm_revo51 __devinitdata = {
	.type = SND_AK4358,
	.num_dacs = 6,
	.ops = {
	.set_rate_val = revo_set_rate_val
	},
	.dac_info = revo51_dac,
	};

	static struct snd_ak4xxx_private akm_revo51_priv __devinitdata = {
	.caddr = 2,
	.cif = 0,
	.data_mask = VT1724_REVO_CDOUT,
	.clk_mask = VT1724_REVO_CCLK,
	.cs_mask = VT1724_REVO_CS0 \| VT1724_REVO_CS1,
	.cs_addr = VT1724_REVO_CS1,
	.cs_none = VT1724_REVO_CS0 \| VT1724_REVO_CS1,
	.add_flags = VT1724_REVO_CCLK, /* high at init */
	.mask_flags = 0,
	};

	static struct snd_akm4xxx akm_revo51_adc __devinitdata = {
	.type = SND_AK5365,
	.num_adcs = 2,
	.adc_info = revo51_adc,
	};

	static struct snd_ak4xxx_private akm_revo51_adc_priv __devinitdata = {
	.caddr = 2,
	.cif = 0,
	.data_mask = VT1724_REVO_CDOUT,
	.clk_mask = VT1724_REVO_CCLK,
	.cs_mask = VT1724_REVO_CS0 \| VT1724_REVO_CS1,
	.cs_addr = VT1724_REVO_CS0,
	.cs_none = VT1724_REVO_CS0 \| VT1724_REVO_CS1,
	.add_flags = VT1724_REVO_CCLK, /* high at init */
	.mask_flags = 0,
	};

	static struct snd_pt2258 ptc_revo51_volume;

	/* AK4358 for AP192 DAC, AK5385A for ADC */
	static void ap192_set_rate_val(struct snd_akm4xxx *ak, unsigned int rate)
	{
	struct snd_ice1712 *ice = ak->private_data[0];

	revo_set_rate_val(ak, rate);

	#if 1 /* FIXME: do we need this procedure? */
	/* reset DFS pin of AK5385A for ADC, too */
	/* DFS0 (pin 18) -- GPIO10 pin 77 */
	snd_ice1712_save_gpio_status(ice);
	snd_ice1712_gpio_write_bits(ice, 1 << 10,
	rate > 48000 ? (1 << 10) : 0);
	snd_ice1712_restore_gpio_status(ice);
	#endif
	}

	static const struct snd_akm4xxx_dac_channel ap192_dac[] = {
	AK_DAC("PCM Playback Volume", 2)
	};

	static struct snd_akm4xxx akm_ap192 __devinitdata = {
	.type = SND_AK4358,
	.num_dacs = 2,
	.ops = {
	.set_rate_val = ap192_set_rate_val
	},
	.dac_info = ap192_dac,
	};

	static struct snd_ak4xxx_private akm_ap192_priv __devinitdata = {
	.caddr = 2,
	.cif = 0,
	.data_mask = VT1724_REVO_CDOUT,
	.clk_mask = VT1724_REVO_CCLK,
	.cs_mask = VT1724_REVO_CS0 \| VT1724_REVO_CS3,
	.cs_addr = VT1724_REVO_CS3,
	.cs_none = VT1724_REVO_CS0 \| VT1724_REVO_CS3,
	.add_flags = VT1724_REVO_CCLK, /* high at init */
	.mask_flags = 0,
	};

	#if 0
	/* FIXME: ak4114 makes the sound much lower due to some confliction,
	* so let's disable it right now...
	*/
	#define BUILD_AK4114_AP192
	#endif

	#ifdef BUILD_AK4114_AP192
	/* AK4114 support on Audiophile 192 */
	/* CDTO (pin 32) -- GPIO2 pin 52
	* CDTI (pin 33) -- GPIO3 pin 53 (shared with AK4358)
	* CCLK (pin 34) -- GPIO1 pin 51 (shared with AK4358)
	* CSN (pin 35) -- GPIO7 pin 59
	*/
	#define AK4114_ADDR 0x00

	static void write_data(struct snd_ice1712 *ice, unsigned int gpio,
	unsigned int data, int idx)
	{
	for (; idx >= 0; idx--) {
	/* drop clock */
	gpio &= ~VT1724_REVO_CCLK;
	snd_ice1712_gpio_write(ice, gpio);
	udelay(1);
	/* set data */
	if (data & (1 << idx))
	gpio \|= VT1724_REVO_CDOUT;
	else
	gpio &= ~VT1724_REVO_CDOUT;
	snd_ice1712_gpio_write(ice, gpio);
	udelay(1);
	/* raise clock */
	gpio \|= VT1724_REVO_CCLK;
	snd_ice1712_gpio_write(ice, gpio);
	udelay(1);
	}
	}

	static unsigned char read_data(struct snd_ice1712 *ice, unsigned int gpio,
	int idx)
	{
	unsigned char data = 0;

	for (; idx >= 0; idx--) {
	/* drop clock */
	gpio &= ~VT1724_REVO_CCLK;
	snd_ice1712_gpio_write(ice, gpio);
	udelay(1);
	/* read data */
	if (snd_ice1712_gpio_read(ice) & VT1724_REVO_CDIN)
	data \|= (1 << idx);
	udelay(1);
	/* raise clock */
	gpio \|= VT1724_REVO_CCLK;
	snd_ice1712_gpio_write(ice, gpio);
	udelay(1);
	}
	return data;
	}

	static unsigned int ap192_4wire_start(struct snd_ice1712 *ice)
	{
	unsigned int tmp;

	snd_ice1712_save_gpio_status(ice);
	tmp = snd_ice1712_gpio_read(ice);
	tmp \|= VT1724_REVO_CCLK; /* high at init */
	tmp \|= VT1724_REVO_CS0;
	tmp &= ~VT1724_REVO_CS3;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
	return tmp;
	}

	static void ap192_4wire_finish(struct snd_ice1712 *ice, unsigned int tmp)
	{
	tmp \|= VT1724_REVO_CS3;
	tmp \|= VT1724_REVO_CS0;
	snd_ice1712_gpio_write(ice, tmp);
	udelay(1);
	snd_ice1712_restore_gpio_status(ice);
	}

	static void ap192_ak4114_write(void *private_data, unsigned char addr,
	unsigned char data)
	{
	struct snd_ice1712 *ice = private_data;
	unsigned int tmp, addrdata;

	tmp = ap192_4wire_start(ice);
	addrdata = (AK4114_ADDR << 6) \| 0x20 \| (addr & 0x1f);
	addrdata = (addrdata << 8) \| data;
	write_data(ice, tmp, addrdata, 15);
	ap192_4wire_finish(ice, tmp);
	}

	static unsigned char ap192_ak4114_read(void *private_data, unsigned char addr)
	{
	struct snd_ice1712 *ice = private_data;
	unsigned int tmp;
	unsigned char data;

	tmp = ap192_4wire_start(ice);
	write_data(ice, tmp, (AK4114_ADDR << 6) \| (addr & 0x1f), 7);
	data = read_data(ice, tmp, 7);
	ap192_4wire_finish(ice, tmp);
	return data;
	}

	static int __devinit ap192_ak4114_init(struct snd_ice1712 *ice)
	{
	static const unsigned char ak4114_init_vals[] = {
	AK4114_RST \| AK4114_PWN \| AK4114_OCKS0 \| AK4114_OCKS1,
	AK4114_DIF_I24I2S,
	AK4114_TX1E,
	AK4114_EFH_1024 \| AK4114_DIT \| AK4114_IPS(1),
	0,
	0
	};
	static const unsigned char ak4114_init_txcsb[] = {
	0x41, 0x02, 0x2c, 0x00, 0x00
	};
	struct ak4114 *ak;
	int err;

	return snd_ak4114_create(ice->card,
	ap192_ak4114_read,
	ap192_ak4114_write,
	ak4114_init_vals, ak4114_init_txcsb,
	ice, &ak);
	}
	#endif /* BUILD_AK4114_AP192 */

	static int __devinit revo_init(struct snd_ice1712 *ice)
	{
	struct snd_akm4xxx *ak;
	int err;

	/* determine I2C, DACs and ADCs */
	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_REVOLUTION71:
	ice->num_total_dacs = 8;
	ice->num_total_adcs = 2;
	ice->gpio.i2s_mclk_changed = revo_i2s_mclk_changed;
	break;
	case VT1724_SUBDEVICE_REVOLUTION51:
	ice->num_total_dacs = 6;
	ice->num_total_adcs = 2;
	break;
	case VT1724_SUBDEVICE_AUDIOPHILE192:
	ice->num_total_dacs = 2;
	ice->num_total_adcs = 2;
	break;
	default:
	snd_BUG();
	return -EINVAL;
	}

	/* second stage of initialization, analog parts and others */
	ak = ice->akm = kcalloc(2, sizeof(struct snd_akm4xxx), GFP_KERNEL);
	if (! ak)
	return -ENOMEM;
	ice->akm_codecs = 2;
	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_REVOLUTION71:
	ice->akm_codecs = 2;
	if ((err = snd_ice1712_akm4xxx_init(ak, &akm_revo_front, &akm_revo_front_priv, ice)) < 0)
	return err;
	if ((err = snd_ice1712_akm4xxx_init(ak + 1, &akm_revo_surround, &akm_revo_surround_priv, ice)) < 0)
	return err;
	/* unmute all codecs */
	snd_ice1712_gpio_write_bits(ice, VT1724_REVO_MUTE, VT1724_REVO_MUTE);
	break;
	case VT1724_SUBDEVICE_REVOLUTION51:
	ice->akm_codecs = 2;
	err = snd_ice1712_akm4xxx_init(ak, &akm_revo51,
	&akm_revo51_priv, ice);
	if (err < 0)
	return err;
	err = snd_ice1712_akm4xxx_init(ak+1, &akm_revo51_adc,
	&akm_revo51_adc_priv, ice);
	if (err < 0)
	return err;
	err = revo51_i2c_init(ice, &ptc_revo51_volume);
	if (err < 0)
	return err;
	/* unmute all codecs */
	snd_ice1712_gpio_write_bits(ice, VT1724_REVO_MUTE,
	VT1724_REVO_MUTE);
	break;
	case VT1724_SUBDEVICE_AUDIOPHILE192:
	ice->akm_codecs = 1;
	err = snd_ice1712_akm4xxx_init(ak, &akm_ap192, &akm_ap192_priv,
	ice);
	if (err < 0)
	return err;

	break;
	}

	return 0;
	}


	static int __devinit revo_add_controls(struct snd_ice1712 *ice)
	{
	struct revo51_spec *spec;
	int err;

	switch (ice->eeprom.subvendor) {
	case VT1724_SUBDEVICE_REVOLUTION71:
	err = snd_ice1712_akm4xxx_build_controls(ice);
	if (err < 0)
	return err;
	break;
	case VT1724_SUBDEVICE_REVOLUTION51:
	err = snd_ice1712_akm4xxx_build_controls(ice);
	if (err < 0)
	return err;
	spec = ice->spec;
	err = snd_pt2258_build_controls(spec->pt2258);
	if (err < 0)
	return err;
	break;
	case VT1724_SUBDEVICE_AUDIOPHILE192:
	err = snd_ice1712_akm4xxx_build_controls(ice);
	if (err < 0)
	return err;
	#ifdef BUILD_AK4114_AP192
	err = ap192_ak4114_init(ice);
	if (err < 0)
	return err;
	#endif
	break;
	}
	return 0;
	}

	/* entry point */
	struct snd_ice1712_card_info snd_vt1724_revo_cards[] __devinitdata = {
	{
	.subvendor = VT1724_SUBDEVICE_REVOLUTION71,
	.name = "M Audio Revolution-7.1",
	.model = "revo71",
	.chip_init = revo_init,
	.build_controls = revo_add_controls,
	},
	{
	.subvendor = VT1724_SUBDEVICE_REVOLUTION51,
	.name = "M Audio Revolution-5.1",
	.model = "revo51",
	.chip_init = revo_init,
	.build_controls = revo_add_controls,
	},
	{
	.subvendor = VT1724_SUBDEVICE_AUDIOPHILE192,
	.name = "M Audio Audiophile192",
	.model = "ap192",
	.chip_init = revo_init,
	.build_controls = revo_add_controls,
	},
	{ } /* terminator */
	};