Merge branch 'linux-3.4.57' into rel-17
[linux-2.6.git] / sound / core / timer_compat.c
1 /*
2  *   32bit -> 64bit ioctl wrapper for timer API
3  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
4  *
5  *   This program is free software; you can redistribute it and/or modify
6  *   it under the terms of the GNU General Public License as published by
7  *   the Free Software Foundation; either version 2 of the License, or
8  *   (at your option) any later version.
9  *
10  *   This program is distributed in the hope that it will be useful,
11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  *   GNU General Public License for more details.
14  *
15  *   You should have received a copy of the GNU General Public License
16  *   along with this program; if not, write to the Free Software
17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
18  *
19  */
20
21 /* This file included from timer.c */
22
23 #include <linux/compat.h>
24
25 struct snd_timer_info32 {
26         u32 flags;
27         s32 card;
28         unsigned char id[64];
29         unsigned char name[80];
30         u32 reserved0;
31         u32 resolution;
32         unsigned char reserved[64];
33 };
34
35 static int snd_timer_user_info_compat(struct file *file,
36                                       struct snd_timer_info32 __user *_info)
37 {
38         struct snd_timer_user *tu;
39         struct snd_timer_info32 info;
40         struct snd_timer *t;
41
42         tu = file->private_data;
43         if (snd_BUG_ON(!tu->timeri))
44                 return -ENXIO;
45         t = tu->timeri->timer;
46         if (snd_BUG_ON(!t))
47                 return -ENXIO;
48         memset(&info, 0, sizeof(info));
49         info.card = t->card ? t->card->number : -1;
50         if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
51                 info.flags |= SNDRV_TIMER_FLG_SLAVE;
52         strlcpy(info.id, t->id, sizeof(info.id));
53         strlcpy(info.name, t->name, sizeof(info.name));
54         info.resolution = t->hw.resolution;
55         if (copy_to_user(_info, &info, sizeof(*_info)))
56                 return -EFAULT;
57         return 0;
58 }
59
60 struct snd_timer_status32 {
61         struct compat_timespec tstamp;
62         u32 resolution;
63         u32 lost;
64         u32 overrun;
65         u32 queue;
66         unsigned char reserved[64];
67 };
68
69 static int snd_timer_user_status_compat(struct file *file,
70                                         struct snd_timer_status32 __user *_status)
71 {
72         struct snd_timer_user *tu;
73         struct snd_timer_status status;
74         
75         tu = file->private_data;
76         if (snd_BUG_ON(!tu->timeri))
77                 return -ENXIO;
78         memset(&status, 0, sizeof(status));
79         status.tstamp = tu->tstamp;
80         status.resolution = snd_timer_resolution(tu->timeri);
81         status.lost = tu->timeri->lost;
82         status.overrun = tu->overrun;
83         spin_lock_irq(&tu->qlock);
84         status.queue = tu->qused;
85         spin_unlock_irq(&tu->qlock);
86         if (copy_to_user(_status, &status, sizeof(status)))
87                 return -EFAULT;
88         return 0;
89 }
90
91 /*
92  */
93
94 enum {
95         SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
96         SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
97 };
98
99 static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
100 {
101         void __user *argp = compat_ptr(arg);
102
103         switch (cmd) {
104         case SNDRV_TIMER_IOCTL_PVERSION:
105         case SNDRV_TIMER_IOCTL_TREAD:
106         case SNDRV_TIMER_IOCTL_GINFO:
107         case SNDRV_TIMER_IOCTL_GPARAMS:
108         case SNDRV_TIMER_IOCTL_GSTATUS:
109         case SNDRV_TIMER_IOCTL_SELECT:
110         case SNDRV_TIMER_IOCTL_PARAMS:
111         case SNDRV_TIMER_IOCTL_START:
112         case SNDRV_TIMER_IOCTL_START_OLD:
113         case SNDRV_TIMER_IOCTL_STOP:
114         case SNDRV_TIMER_IOCTL_STOP_OLD:
115         case SNDRV_TIMER_IOCTL_CONTINUE:
116         case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
117         case SNDRV_TIMER_IOCTL_PAUSE:
118         case SNDRV_TIMER_IOCTL_PAUSE_OLD:
119         case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
120                 return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
121         case SNDRV_TIMER_IOCTL_INFO32:
122                 return snd_timer_user_info_compat(file, argp);
123         case SNDRV_TIMER_IOCTL_STATUS32:
124                 return snd_timer_user_status_compat(file, argp);
125         }
126         return -ENOIOCTLCMD;
127 }