[ALSA] Move vmaster code to sound core

Move the codes for virtual master controls to sound core part so that
not only hda-intel drivers can use it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

3 files changed, 1 insertions, 371 deletions

diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig
index 812085d..48296d9 100644
--- a/sound/pci/Kconfig
+++ b/sound/pci/Kconfig
@@ -517,6 +517,7 @@ config SND_HDA_INTEL
 	tristate "Intel HD Audio"
 	depends on SND
 	select SND_PCM
+	select SND_VMASTER
 	help
 	  Say Y here to include support for Intel "High Definition
 	  Audio" (Azalia) motherboard devices.
diff --git a/sound/pci/hda/hda_local.h b/sound/pci/hda/hda_local.h
index ce2ad42..5c9e578 100644
--- a/sound/pci/hda/hda_local.h
+++ b/sound/pci/hda/hda_local.h
@@ -418,11 +418,4 @@ int snd_hda_check_amp_list_power(struct hda_codec *codec,
 				 hda_nid_t nid);
 #endif /* CONFIG_SND_HDA_POWER_SAVE */
 
-/*
- * virtual master control
- */
-struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
-						 const unsigned int *tlv);
-int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave);
-		      
 #endif /* __SOUND_HDA_LOCAL_H */
diff --git a/sound/pci/hda/vmaster.c b/sound/pci/hda/vmaster.c
deleted file mode 100644
index 2da49d2..0000000
--- a/sound/pci/hda/vmaster.c
+++ /dev/null
@@ -1,364 +0,0 @@
-/*
- * Virtual master and slave controls
- *
- *  Copyright (c) 2008 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, version 2.
- *
- */
-
-#include <linux/slab.h>
-#include <sound/core.h>
-#include <sound/control.h>
-
-/*
- * a subset of information returned via ctl info callback
- */
-struct link_ctl_info {
-	int type;		/* value type */
-	int count;		/* item count */
-	int min_val, max_val;	/* min, max values */
-};
-
-/*
- * link master - this contains a list of slave controls that are
- * identical types, i.e. info returns the same value type and value
- * ranges, but may have different number of counts.
- *
- * The master control is so far only mono volume/switch for simplicity.
- * The same value will be applied to all slaves.
- */
-struct link_master {
-	struct list_head slaves;
-	struct link_ctl_info info;
-	int val;		/* the master value */
-};
-
-/*
- * link slave - this contains a slave control element
- *
- * It fakes the control callbacsk with additional attenuation by the
- * master control.  A slave may have either one or two channels.
- */
-
-struct link_slave {
-	struct list_head list;
-	struct link_master *master;
-	struct link_ctl_info info;
-	int vals[2];		/* current values */
-	struct snd_kcontrol slave; /* the copy of original control entry */
-};
-
-/* get the slave ctl info and save the initial values */
-static int slave_init(struct link_slave *slave)
-{
-	struct snd_ctl_elem_info *uinfo;
-	struct snd_ctl_elem_value *uctl;
-	int err, ch;
-
-	if (slave->info.count)
-		return 0; /* already initialized */
-
-	uinfo = kmalloc(sizeof(*uinfo), GFP_KERNEL);
-	if (!uinfo)
-		return -ENOMEM;
-	uinfo->id = slave->slave.id;
-	err = slave->slave.info(&slave->slave, uinfo);
-	if (err < 0) {
-		kfree(uinfo);
-		return err;
-	}
-	slave->info.type = uinfo->type;
-	slave->info.count = uinfo->count;
-	if (slave->info.count > 2  ||
-	    (slave->info.type != SNDRV_CTL_ELEM_TYPE_INTEGER &&
-	     slave->info.type != SNDRV_CTL_ELEM_TYPE_BOOLEAN)) {
-		snd_printk(KERN_ERR "invalid slave element\n");
-		kfree(uinfo);
-		return -EINVAL;
-	}
-	slave->info.min_val = uinfo->value.integer.min;
-	slave->info.max_val = uinfo->value.integer.max;
-	kfree(uinfo);
-
-	uctl = kmalloc(sizeof(*uctl), GFP_KERNEL);
-	if (!uctl)
-		return -ENOMEM;
-	uctl->id = slave->slave.id;
-	err = slave->slave.get(&slave->slave, uctl);
-	for (ch = 0; ch < slave->info.count; ch++)
-		slave->vals[ch] = uctl->value.integer.value[ch];
-	kfree(uctl);
-	return 0;
-}
-
-/* initialize master volume */
-static int master_init(struct link_master *master)
-{
-	struct link_slave *slave;
-
-	if (master->info.count)
-		return 0; /* already initialized */
-
-	list_for_each_entry(slave, &master->slaves, list) {
-		int err = slave_init(slave);
-		if (err < 0)
-			return err;
-		master->info = slave->info;
-		master->info.count = 1; /* always mono */
-		/* set full volume as default (= no attenuation) */
-		master->val = master->info.max_val;
-		return 0;
-	}
-	return -ENOENT;
-}
-
-static int slave_get_val(struct link_slave *slave,
-			 struct snd_ctl_elem_value *ucontrol)
-{
-	int err, ch;
-
-	err = slave_init(slave);
-	if (err < 0)
-		return err;
-	for (ch = 0; ch < slave->info.count; ch++)
-		ucontrol->value.integer.value[ch] = slave->vals[ch];
-	return 0;
-}
-
-static int slave_put_val(struct link_slave *slave,
-			 struct snd_ctl_elem_value *ucontrol)
-{
-	int err, ch, vol;
-
-	err = master_init(slave->master);
-	if (err < 0)
-		return err;
-
-	switch (slave->info.type) {
-	case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
-		for (ch = 0; ch < slave->info.count; ch++)
-			ucontrol->value.integer.value[ch] &=
-				!!slave->master->val;
-		break;
-	case SNDRV_CTL_ELEM_TYPE_INTEGER:
-		for (ch = 0; ch < slave->info.count; ch++) {
-			/* max master volume is supposed to be 0 dB */
-			vol = ucontrol->value.integer.value[ch];
-			vol += slave->master->val - slave->master->info.max_val;
-			if (vol < slave->info.min_val)
-				vol = slave->info.min_val;
-			else if (vol > slave->info.max_val)
-				vol = slave->info.max_val;
-			ucontrol->value.integer.value[ch] = vol;
-		}
-		break;
-	}
-	return slave->slave.put(&slave->slave, ucontrol);
-}
-
-/*
- * ctl callbacks for slaves
- */
-static int slave_info(struct snd_kcontrol *kcontrol,
-		      struct snd_ctl_elem_info *uinfo)
-{
-	struct link_slave *slave = snd_kcontrol_chip(kcontrol);
-	return slave->slave.info(&slave->slave, uinfo);
-}
-
-static int slave_get(struct snd_kcontrol *kcontrol,
-		     struct snd_ctl_elem_value *ucontrol)
-{
-	struct link_slave *slave = snd_kcontrol_chip(kcontrol);
-	return slave_get_val(slave, ucontrol);
-}
-
-static int slave_put(struct snd_kcontrol *kcontrol,
-		     struct snd_ctl_elem_value *ucontrol)
-{
-	struct link_slave *slave = snd_kcontrol_chip(kcontrol);
-	int err, ch, changed = 0;
-
-	err = slave_init(slave);
-	if (err < 0)
-		return err;
-	for (ch = 0; ch < slave->info.count; ch++) {
-		if (slave->vals[ch] != ucontrol->value.integer.value[ch]) {
-			changed = 1;
-			slave->vals[ch] = ucontrol->value.integer.value[ch];
-		}
-	}
-	if (!changed)
-		return 0;
-	return slave_put_val(slave, ucontrol);
-}
-
-static int slave_tlv_cmd(struct snd_kcontrol *kcontrol,
-			 int op_flag, unsigned int size,
-			 unsigned int __user *tlv)
-{
-	struct link_slave *slave = snd_kcontrol_chip(kcontrol);
-	/* FIXME: this assumes that the max volume is 0 dB */
-	return slave->slave.tlv.c(&slave->slave, op_flag, size, tlv);
-}
-
-static void slave_free(struct snd_kcontrol *kcontrol)
-{
-	struct link_slave *slave = snd_kcontrol_chip(kcontrol);
-	if (slave->slave.private_free)
-		slave->slave.private_free(&slave->slave);
-	if (slave->master)
-		list_del(&slave->list);
-	kfree(slave);
-}
-
-/*
- * Add a slave control to the group with the given master control
- *
- * All slaves must be the same type (returning the same information
- * via info callback).  The fucntion doesn't check it, so it's your
- * responsibility.
- *
- * Also, some additional limitations:
- * - at most two channels
- * - logarithmic volume control (dB level), no linear volume
- * - master can only attenuate the volume, no gain
- */
-int snd_ctl_add_slave(struct snd_kcontrol *master, struct snd_kcontrol *slave)
-{
-	struct link_master *master_link = snd_kcontrol_chip(master);
-	struct link_slave *srec;
-
-	srec = kzalloc(sizeof(*srec) +
-		       slave->count * sizeof(*slave->vd), GFP_KERNEL);
-	if (!srec)
-		return -ENOMEM;
-	srec->slave = *slave;
-	memcpy(srec->slave.vd, slave->vd, slave->count * sizeof(*slave->vd));
-	srec->master = master_link;
-
-	/* override callbacks */
-	slave->info = slave_info;
-	slave->get = slave_get;
-	slave->put = slave_put;
-	if (slave->vd[0].access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK)
-		slave->tlv.c = slave_tlv_cmd;
-	slave->private_data = srec;
-	slave->private_free = slave_free;
-
-	list_add_tail(&srec->list, &master_link->slaves);
-	return 0;
-}
-
-/*
- * ctl callbacks for master controls
- */
-static int master_info(struct snd_kcontrol *kcontrol,
-		      struct snd_ctl_elem_info *uinfo)
-{
-	struct link_master *master = snd_kcontrol_chip(kcontrol);
-	int ret;
-
-	ret = master_init(master);
-	if (ret < 0)
-		return ret;
-	uinfo->type = master->info.type;
-	uinfo->count = master->info.count;
-	uinfo->value.integer.min = master->info.min_val;
-	uinfo->value.integer.max = master->info.max_val;
-	return 0;
-}
-
-static int master_get(struct snd_kcontrol *kcontrol,
-		      struct snd_ctl_elem_value *ucontrol)
-{
-	struct link_master *master = snd_kcontrol_chip(kcontrol);
-	int err = master_init(master);
-	if (err < 0)
-		return err;
-	ucontrol->value.integer.value[0] = master->val;
-	return 0;
-}
-
-static int master_put(struct snd_kcontrol *kcontrol,
-		      struct snd_ctl_elem_value *ucontrol)
-{
-	struct link_master *master = snd_kcontrol_chip(kcontrol);
-	struct link_slave *slave;
-	struct snd_ctl_elem_value *uval;
-	int err, old_val;
-
-	err = master_init(master);
-	if (err < 0)
-		return err;
-	old_val = master->val;
-	if (ucontrol->value.integer.value[0] == old_val)
-		return 0;
-
-	uval = kmalloc(sizeof(*uval), GFP_KERNEL);
-	if (!uval)
-		return -ENOMEM;
-	list_for_each_entry(slave, &master->slaves, list) {
-		master->val = old_val;
-		uval->id = slave->slave.id;
-		slave_get_val(slave, uval);
-		master->val = ucontrol->value.integer.value[0];
-		slave_put_val(slave, uval);
-	}
-	kfree(uval);
-	return 1;
-}
-
-static void master_free(struct snd_kcontrol *kcontrol)
-{
-	struct link_master *master = snd_kcontrol_chip(kcontrol);
-	struct link_slave *slave;
-
-	list_for_each_entry(slave, &master->slaves, list)
-		slave->master = NULL;
-	kfree(master);
-}
-
-
-/*
- * Create a virtual master control with the given name
- */
-struct snd_kcontrol *snd_ctl_make_virtual_master(char *name,
-						 const unsigned int *tlv)
-{
-	struct link_master *master;
-	struct snd_kcontrol *kctl;
-	struct snd_kcontrol_new knew;
-
-	memset(&knew, 0, sizeof(knew));
-	knew.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-	knew.name = name;
-	knew.info = master_info;
-
-	master = kzalloc(sizeof(*master), GFP_KERNEL);
-	if (!master)
-		return NULL;
-	INIT_LIST_HEAD(&master->slaves);
-
-	kctl = snd_ctl_new1(&knew, master);
-	if (!kctl) {
-		kfree(master);
-		return NULL;
-	}
-	/* override some callbacks */
-	kctl->info = master_info;
-	kctl->get = master_get;
-	kctl->put = master_put;
-	kctl->private_free = master_free;
-
-	/* additional (constant) TLV read */
-	if (tlv) {
-		/* FIXME: this assumes that the max volume is 0 dB */
-		kctl->vd[0].access |= SNDRV_CTL_ELEM_ACCESS_TLV_READ;
-		kctl->tlv.p = tlv;
-	}
-	return kctl;
-}