From e922b0028fad87de0d262f9fa51f98595d2df258 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Mon, 18 Feb 2008 13:03:13 +0100 Subject: [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 --- sound/pci/Kconfig | 1 + sound/pci/hda/hda_local.h | 7 - sound/pci/hda/vmaster.c | 364 ---------------------------------------------- 3 files changed, 1 insertion(+), 371 deletions(-) delete mode 100644 sound/pci/hda/vmaster.c (limited to 'sound/pci') diff --git a/sound/pci/Kconfig b/sound/pci/Kconfig index 812085d521f..48296d97bf3 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 ce2ad42a8a8..5c9e578f7f2 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 2da49d20a1f..00000000000 --- a/sound/pci/hda/vmaster.c +++ /dev/null @@ -1,364 +0,0 @@ -/* - * Virtual master and slave controls - * - * Copyright (c) 2008 by Takashi Iwai - * - * 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 -#include -#include - -/* - * 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; -} -- cgit v1.2.3