mirror of https://gitee.com/openkylin/linux.git
128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/*
|
|
* HWDEP Interface for HD-audio codec
|
|
*
|
|
* Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
|
|
*
|
|
* This driver 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 driver 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/slab.h>
|
|
#include <linux/compat.h>
|
|
#include <sound/core.h>
|
|
#include "hda_codec.h"
|
|
#include "hda_local.h"
|
|
#include <sound/hda_hwdep.h>
|
|
#include <sound/minors.h>
|
|
|
|
/*
|
|
* write/read an out-of-bound verb
|
|
*/
|
|
static int verb_write_ioctl(struct hda_codec *codec,
|
|
struct hda_verb_ioctl __user *arg)
|
|
{
|
|
u32 verb, res;
|
|
|
|
if (get_user(verb, &arg->verb))
|
|
return -EFAULT;
|
|
res = snd_hda_codec_read(codec, verb >> 24, 0,
|
|
(verb >> 8) & 0xffff, verb & 0xff);
|
|
if (put_user(res, &arg->res))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int get_wcap_ioctl(struct hda_codec *codec,
|
|
struct hda_verb_ioctl __user *arg)
|
|
{
|
|
u32 verb, res;
|
|
|
|
if (get_user(verb, &arg->verb))
|
|
return -EFAULT;
|
|
res = get_wcaps(codec, verb >> 24);
|
|
if (put_user(res, &arg->res))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
*/
|
|
static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct hda_codec *codec = hw->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (cmd) {
|
|
case HDA_IOCTL_PVERSION:
|
|
return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
|
|
case HDA_IOCTL_VERB_WRITE:
|
|
return verb_write_ioctl(codec, argp);
|
|
case HDA_IOCTL_GET_WCAP:
|
|
return get_wcap_ioctl(codec, argp);
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
|
|
}
|
|
#endif
|
|
|
|
static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
|
|
{
|
|
#ifndef CONFIG_SND_DEBUG_VERBOSE
|
|
if (!capable(CAP_SYS_RAWIO))
|
|
return -EACCES;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int snd_hda_create_hwdep(struct hda_codec *codec)
|
|
{
|
|
char hwname[16];
|
|
struct snd_hwdep *hwdep;
|
|
int err;
|
|
|
|
sprintf(hwname, "HDA Codec %d", codec->addr);
|
|
err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
|
|
if (err < 0)
|
|
return err;
|
|
codec->hwdep = hwdep;
|
|
sprintf(hwdep->name, "HDA Codec %d", codec->addr);
|
|
hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
|
|
hwdep->private_data = codec;
|
|
hwdep->exclusive = 1;
|
|
|
|
hwdep->ops.open = hda_hwdep_open;
|
|
hwdep->ops.ioctl = hda_hwdep_ioctl;
|
|
#ifdef CONFIG_COMPAT
|
|
hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
|
|
#endif
|
|
|
|
/* link to codec */
|
|
hwdep->dev.parent = &codec->dev;
|
|
|
|
/* for sysfs */
|
|
hwdep->dev.groups = snd_hda_dev_attr_groups;
|
|
dev_set_drvdata(&hwdep->dev, codec);
|
|
|
|
return 0;
|
|
}
|