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git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blob - sound/pci/hda/hda_hwdep.c
2 * HWDEP Interface for HD-audio codec
4 * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
6 * This driver is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This driver is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/compat.h>
24 #include <sound/core.h>
25 #include "hda_codec.h"
26 #include "hda_local.h"
27 #include <sound/hda_hwdep.h>
28 #include <sound/minors.h>
31 * write/read an out-of-bound verb
33 static int verb_write_ioctl(struct hda_codec
*codec
,
34 struct hda_verb_ioctl __user
*arg
)
38 if (get_user(verb
, &arg
->verb
))
40 res
= snd_hda_codec_read(codec
, verb
>> 24, 0,
41 (verb
>> 8) & 0xffff, verb
& 0xff);
42 if (put_user(res
, &arg
->res
))
47 static int get_wcap_ioctl(struct hda_codec
*codec
,
48 struct hda_verb_ioctl __user
*arg
)
52 if (get_user(verb
, &arg
->verb
))
54 res
= get_wcaps(codec
, verb
>> 24);
55 if (put_user(res
, &arg
->res
))
63 static int hda_hwdep_ioctl(struct snd_hwdep
*hw
, struct file
*file
,
64 unsigned int cmd
, unsigned long arg
)
66 struct hda_codec
*codec
= hw
->private_data
;
67 void __user
*argp
= (void __user
*)arg
;
70 case HDA_IOCTL_PVERSION
:
71 return put_user(HDA_HWDEP_VERSION
, (int __user
*)argp
);
72 case HDA_IOCTL_VERB_WRITE
:
73 return verb_write_ioctl(codec
, argp
);
74 case HDA_IOCTL_GET_WCAP
:
75 return get_wcap_ioctl(codec
, argp
);
81 static int hda_hwdep_ioctl_compat(struct snd_hwdep
*hw
, struct file
*file
,
82 unsigned int cmd
, unsigned long arg
)
84 return hda_hwdep_ioctl(hw
, file
, cmd
, (unsigned long)compat_ptr(arg
));
88 static int hda_hwdep_open(struct snd_hwdep
*hw
, struct file
*file
)
90 #ifndef CONFIG_SND_DEBUG_VERBOSE
91 if (!capable(CAP_SYS_RAWIO
))
97 int snd_hda_create_hwdep(struct hda_codec
*codec
)
100 struct snd_hwdep
*hwdep
;
103 sprintf(hwname
, "HDA Codec %d", codec
->addr
);
104 err
= snd_hwdep_new(codec
->bus
->card
, hwname
, codec
->addr
, &hwdep
);
107 codec
->hwdep
= hwdep
;
108 sprintf(hwdep
->name
, "HDA Codec %d", codec
->addr
);
109 hwdep
->iface
= SNDRV_HWDEP_IFACE_HDA
;
110 hwdep
->private_data
= codec
;
111 hwdep
->exclusive
= 1;
112 hwdep
->groups
= snd_hda_dev_attr_groups
;
114 hwdep
->ops
.open
= hda_hwdep_open
;
115 hwdep
->ops
.ioctl
= hda_hwdep_ioctl
;
117 hwdep
->ops
.ioctl_compat
= hda_hwdep_ioctl_compat
;
121 hwdep
->dev
= &codec
->dev
;