6efdd8513f
Allow the codec object to have an individual card pointer. Not only this simplifies the redirections in many places, also this will allow us to make each codec assigned to a different card object. Signed-off-by: Takashi Iwai <tiwai@suse.de>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/*
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* HWDEP Interface for HD-audio codec
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*
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* Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
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*
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* This driver is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This driver is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/compat.h>
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#include <sound/core.h>
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#include "hda_codec.h"
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#include "hda_local.h"
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#include <sound/hda_hwdep.h>
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#include <sound/minors.h>
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/*
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* write/read an out-of-bound verb
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*/
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static int verb_write_ioctl(struct hda_codec *codec,
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struct hda_verb_ioctl __user *arg)
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{
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u32 verb, res;
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if (get_user(verb, &arg->verb))
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return -EFAULT;
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res = snd_hda_codec_read(codec, verb >> 24, 0,
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(verb >> 8) & 0xffff, verb & 0xff);
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if (put_user(res, &arg->res))
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return -EFAULT;
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return 0;
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}
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static int get_wcap_ioctl(struct hda_codec *codec,
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struct hda_verb_ioctl __user *arg)
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{
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u32 verb, res;
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if (get_user(verb, &arg->verb))
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return -EFAULT;
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res = get_wcaps(codec, verb >> 24);
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if (put_user(res, &arg->res))
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return -EFAULT;
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return 0;
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}
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/*
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*/
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static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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struct hda_codec *codec = hw->private_data;
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void __user *argp = (void __user *)arg;
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switch (cmd) {
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case HDA_IOCTL_PVERSION:
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return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
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case HDA_IOCTL_VERB_WRITE:
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return verb_write_ioctl(codec, argp);
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case HDA_IOCTL_GET_WCAP:
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return get_wcap_ioctl(codec, argp);
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}
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return -ENOIOCTLCMD;
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}
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#ifdef CONFIG_COMPAT
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static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
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}
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#endif
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static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
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{
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#ifndef CONFIG_SND_DEBUG_VERBOSE
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if (!capable(CAP_SYS_RAWIO))
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return -EACCES;
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#endif
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return 0;
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}
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int snd_hda_create_hwdep(struct hda_codec *codec)
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{
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char hwname[16];
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struct snd_hwdep *hwdep;
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int err;
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sprintf(hwname, "HDA Codec %d", codec->addr);
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err = snd_hwdep_new(codec->card, hwname, codec->addr, &hwdep);
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if (err < 0)
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return err;
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codec->hwdep = hwdep;
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sprintf(hwdep->name, "HDA Codec %d", codec->addr);
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hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
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hwdep->private_data = codec;
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hwdep->exclusive = 1;
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hwdep->ops.open = hda_hwdep_open;
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hwdep->ops.ioctl = hda_hwdep_ioctl;
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#ifdef CONFIG_COMPAT
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hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
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#endif
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/* for sysfs */
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hwdep->dev.groups = snd_hda_dev_attr_groups;
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dev_set_drvdata(&hwdep->dev, codec);
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return 0;
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}
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