sound/ppc/daca.c - linux - Git at Google

 /*
  * PMac DACA 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
  */


 #include <linux/init.h>
 #include <linux/i2c.h>
 #include <linux/kmod.h>
 #include <linux/slab.h>
 #include <sound/core.h>
 #include "pmac.h"

 /* i2c address */
 #define DACA_I2C_ADDR	0x4d

 /* registers */
 #define DACA_REG_SR	0x01
 #define DACA_REG_AVOL	0x02
 #define DACA_REG_GCFG	0x03

 /* maximum volume value */
 #define DACA_VOL_MAX	0x38


 struct pmac_daca {
 	struct pmac_keywest i2c;
 	int left_vol, right_vol;
 	unsigned int deemphasis : 1;
 	unsigned int amp_on : 1;
 };


 /*
  * initialize / detect DACA
  */
 static int daca_init_client(struct pmac_keywest *i2c)
 {
 	unsigned short wdata = 0x00;
 	/* SR: no swap, 1bit delay, 32-48kHz */
 	/* GCFG: power amp inverted, DAC on */
 	if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 ||
 	    i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
 		return -EINVAL;
 	return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
 					  2, (unsigned char*)&wdata);
 }

 /*
  * update volume
  */
 static int daca_set_volume(struct pmac_daca *mix)
 {
 	unsigned char data[2];

 	if (! mix->i2c.client)
 		return -ENODEV;

 	if (mix->left_vol > DACA_VOL_MAX)
 		data[0] = DACA_VOL_MAX;
 	else
 		data[0] = mix->left_vol;
 	if (mix->right_vol > DACA_VOL_MAX)
 		data[1] = DACA_VOL_MAX;
 	else
 		data[1] = mix->right_vol;
 	data[1] |= mix->deemphasis ? 0x40 : 0;
 	if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
 				       2, data) < 0) {
 		snd_printk(KERN_ERR "failed to set volume \n");
 		return -EINVAL;
 	}
 	return 0;
 }


 /* deemphasis switch */
 #define daca_info_deemphasis		snd_ctl_boolean_mono_info

 static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
 			       struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
 	return 0;
 }

 static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
 			       struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	int change;

 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	change = mix->deemphasis != ucontrol->value.integer.value[0];
 	if (change) {
 		mix->deemphasis = !!ucontrol->value.integer.value[0];
 		daca_set_volume(mix);
 	}
 	return change;
 }

 /* output volume */
 static int daca_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 = DACA_VOL_MAX;
 	return 0;
 }

 static int daca_get_volume(struct snd_kcontrol *kcontrol,
 			   struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	ucontrol->value.integer.value[0] = mix->left_vol;
 	ucontrol->value.integer.value[1] = mix->right_vol;
 	return 0;
 }

 static int daca_put_volume(struct snd_kcontrol *kcontrol,
 			   struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	unsigned int vol[2];
 	int change;

 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	vol[0] = ucontrol->value.integer.value[0];
 	vol[1] = ucontrol->value.integer.value[1];
 	if (vol[0] > DACA_VOL_MAX || vol[1] > DACA_VOL_MAX)
 		return -EINVAL;
 	change = mix->left_vol != vol[0] ||
 		mix->right_vol != vol[1];
 	if (change) {
 		mix->left_vol = vol[0];
 		mix->right_vol = vol[1];
 		daca_set_volume(mix);
 	}
 	return change;
 }

 /* amplifier switch */
 #define daca_info_amp	daca_info_deemphasis

 static int daca_get_amp(struct snd_kcontrol *kcontrol,
 			struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
 	return 0;
 }

 static int daca_put_amp(struct snd_kcontrol *kcontrol,
 			struct snd_ctl_elem_value *ucontrol)
 {
 	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
 	struct pmac_daca *mix;
 	int change;

 	if (! (mix = chip->mixer_data))
 		return -ENODEV;
 	change = mix->amp_on != ucontrol->value.integer.value[0];
 	if (change) {
 		mix->amp_on = !!ucontrol->value.integer.value[0];
 		i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 					  mix->amp_on ? 0x05 : 0x04);
 	}
 	return change;
 }

 static struct snd_kcontrol_new daca_mixers[] = {
 	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	  .name = "Deemphasis Switch",
 	  .info = daca_info_deemphasis,
 	  .get = daca_get_deemphasis,
 	  .put = daca_put_deemphasis
 	},
 	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	  .name = "Master Playback Volume",
 	  .info = daca_info_volume,
 	  .get = daca_get_volume,
 	  .put = daca_put_volume
 	},
 	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 	  .name = "Power Amplifier Switch",
 	  .info = daca_info_amp,
 	  .get = daca_get_amp,
 	  .put = daca_put_amp
 	},
 };


 #ifdef CONFIG_PM
 static void daca_resume(struct snd_pmac *chip)
 {
 	struct pmac_daca *mix = chip->mixer_data;
 	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
 	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
 				  mix->amp_on ? 0x05 : 0x04);
 	daca_set_volume(mix);
 }
 #endif /* CONFIG_PM */


 static void daca_cleanup(struct snd_pmac *chip)
 {
 	struct pmac_daca *mix = chip->mixer_data;
 	if (! mix)
 		return;
 	snd_pmac_keywest_cleanup(&mix->i2c);
 	kfree(mix);
 	chip->mixer_data = NULL;
 }

 /* exported */
 int __devinit snd_pmac_daca_init(struct snd_pmac *chip)
 {
 	int i, err;
 	struct pmac_daca *mix;

 	request_module("i2c-powermac");

 	mix = kzalloc(sizeof(*mix), GFP_KERNEL);
 	if (! mix)
 		return -ENOMEM;
 	chip->mixer_data = mix;
 	chip->mixer_free = daca_cleanup;
 	mix->amp_on = 1; /* default on */

 	mix->i2c.addr = DACA_I2C_ADDR;
 	mix->i2c.init_client = daca_init_client;
 	mix->i2c.name = "DACA";
 	if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
 		return err;

 	/*
 	 * build mixers
 	 */
 	strcpy(chip->card->mixername, "PowerMac DACA");

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

 #ifdef CONFIG_PM
 	chip->resume = daca_resume;
 #endif

 	return 0;
 }
	/*
	* PMac DACA 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
	*/


	#include <linux/init.h>
	#include <linux/i2c.h>
	#include <linux/kmod.h>
	#include <linux/slab.h>
	#include <sound/core.h>
	#include "pmac.h"

	/* i2c address */
	#define DACA_I2C_ADDR 0x4d

	/* registers */
	#define DACA_REG_SR 0x01
	#define DACA_REG_AVOL 0x02
	#define DACA_REG_GCFG 0x03

	/* maximum volume value */
	#define DACA_VOL_MAX 0x38


	struct pmac_daca {
	struct pmac_keywest i2c;
	int left_vol, right_vol;
	unsigned int deemphasis : 1;
	unsigned int amp_on : 1;
	};


	/*
	* initialize / detect DACA
	*/
	static int daca_init_client(struct pmac_keywest *i2c)
	{
	unsigned short wdata = 0x00;
	/* SR: no swap, 1bit delay, 32-48kHz */
	/* GCFG: power amp inverted, DAC on */
	if (i2c_smbus_write_byte_data(i2c->client, DACA_REG_SR, 0x08) < 0 \|\|
	i2c_smbus_write_byte_data(i2c->client, DACA_REG_GCFG, 0x05) < 0)
	return -EINVAL;
	return i2c_smbus_write_block_data(i2c->client, DACA_REG_AVOL,
	2, (unsigned char*)&wdata);
	}

	/*
	* update volume
	*/
	static int daca_set_volume(struct pmac_daca *mix)
	{
	unsigned char data[2];

	if (! mix->i2c.client)
	return -ENODEV;

	if (mix->left_vol > DACA_VOL_MAX)
	data[0] = DACA_VOL_MAX;
	else
	data[0] = mix->left_vol;
	if (mix->right_vol > DACA_VOL_MAX)
	data[1] = DACA_VOL_MAX;
	else
	data[1] = mix->right_vol;
	data[1] \|= mix->deemphasis ? 0x40 : 0;
	if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
	2, data) < 0) {
	snd_printk(KERN_ERR "failed to set volume \n");
	return -EINVAL;
	}
	return 0;
	}


	/* deemphasis switch */
	#define daca_info_deemphasis snd_ctl_boolean_mono_info

	static int daca_get_deemphasis(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	if (! (mix = chip->mixer_data))
	return -ENODEV;
	ucontrol->value.integer.value[0] = mix->deemphasis ? 1 : 0;
	return 0;
	}

	static int daca_put_deemphasis(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	int change;

	if (! (mix = chip->mixer_data))
	return -ENODEV;
	change = mix->deemphasis != ucontrol->value.integer.value[0];
	if (change) {
	mix->deemphasis = !!ucontrol->value.integer.value[0];
	daca_set_volume(mix);
	}
	return change;
	}

	/* output volume */
	static int daca_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 = DACA_VOL_MAX;
	return 0;
	}

	static int daca_get_volume(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	if (! (mix = chip->mixer_data))
	return -ENODEV;
	ucontrol->value.integer.value[0] = mix->left_vol;
	ucontrol->value.integer.value[1] = mix->right_vol;
	return 0;
	}

	static int daca_put_volume(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	unsigned int vol[2];
	int change;

	if (! (mix = chip->mixer_data))
	return -ENODEV;
	vol[0] = ucontrol->value.integer.value[0];
	vol[1] = ucontrol->value.integer.value[1];
	if (vol[0] > DACA_VOL_MAX \|\| vol[1] > DACA_VOL_MAX)
	return -EINVAL;
	change = mix->left_vol != vol[0] \|\|
	mix->right_vol != vol[1];
	if (change) {
	mix->left_vol = vol[0];
	mix->right_vol = vol[1];
	daca_set_volume(mix);
	}
	return change;
	}

	/* amplifier switch */
	#define daca_info_amp daca_info_deemphasis

	static int daca_get_amp(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	if (! (mix = chip->mixer_data))
	return -ENODEV;
	ucontrol->value.integer.value[0] = mix->amp_on ? 1 : 0;
	return 0;
	}

	static int daca_put_amp(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
	{
	struct snd_pmac *chip = snd_kcontrol_chip(kcontrol);
	struct pmac_daca *mix;
	int change;

	if (! (mix = chip->mixer_data))
	return -ENODEV;
	change = mix->amp_on != ucontrol->value.integer.value[0];
	if (change) {
	mix->amp_on = !!ucontrol->value.integer.value[0];
	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
	mix->amp_on ? 0x05 : 0x04);
	}
	return change;
	}

	static struct snd_kcontrol_new daca_mixers[] = {
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Deemphasis Switch",
	.info = daca_info_deemphasis,
	.get = daca_get_deemphasis,
	.put = daca_put_deemphasis
	},
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Master Playback Volume",
	.info = daca_info_volume,
	.get = daca_get_volume,
	.put = daca_put_volume
	},
	{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.name = "Power Amplifier Switch",
	.info = daca_info_amp,
	.get = daca_get_amp,
	.put = daca_put_amp
	},
	};


	#ifdef CONFIG_PM
	static void daca_resume(struct snd_pmac *chip)
	{
	struct pmac_daca *mix = chip->mixer_data;
	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_SR, 0x08);
	i2c_smbus_write_byte_data(mix->i2c.client, DACA_REG_GCFG,
	mix->amp_on ? 0x05 : 0x04);
	daca_set_volume(mix);
	}
	#endif /* CONFIG_PM */


	static void daca_cleanup(struct snd_pmac *chip)
	{
	struct pmac_daca *mix = chip->mixer_data;
	if (! mix)
	return;
	snd_pmac_keywest_cleanup(&mix->i2c);
	kfree(mix);
	chip->mixer_data = NULL;
	}

	/* exported */
	int __devinit snd_pmac_daca_init(struct snd_pmac *chip)
	{
	int i, err;
	struct pmac_daca *mix;

	request_module("i2c-powermac");

	mix = kzalloc(sizeof(*mix), GFP_KERNEL);
	if (! mix)
	return -ENOMEM;
	chip->mixer_data = mix;
	chip->mixer_free = daca_cleanup;
	mix->amp_on = 1; /* default on */

	mix->i2c.addr = DACA_I2C_ADDR;
	mix->i2c.init_client = daca_init_client;
	mix->i2c.name = "DACA";
	if ((err = snd_pmac_keywest_init(&mix->i2c)) < 0)
	return err;

	/*
	* build mixers
	*/
	strcpy(chip->card->mixername, "PowerMac DACA");

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

	#ifdef CONFIG_PM
	chip->resume = daca_resume;
	#endif

	return 0;
	}