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
25struct 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
35static 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	snd_assert(tu->timeri != NULL, return -ENXIO);
44	t = tu->timeri->timer;
45	snd_assert(t != NULL, return -ENXIO);
46	memset(&info, 0, sizeof(info));
47	info.card = t->card ? t->card->number : -1;
48	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
49		info.flags |= SNDRV_TIMER_FLG_SLAVE;
50	strlcpy(info.id, t->id, sizeof(info.id));
51	strlcpy(info.name, t->name, sizeof(info.name));
52	info.resolution = t->hw.resolution;
53	if (copy_to_user(_info, &info, sizeof(*_info)))
54		return -EFAULT;
55	return 0;
56}
57
58struct snd_timer_status32 {
59	struct compat_timespec tstamp;
60	u32 resolution;
61	u32 lost;
62	u32 overrun;
63	u32 queue;
64	unsigned char reserved[64];
65};
66
67static int snd_timer_user_status_compat(struct file *file,
68					struct snd_timer_status32 __user *_status)
69{
70	struct snd_timer_user *tu;
71	struct snd_timer_status status;
72
73	tu = file->private_data;
74	snd_assert(tu->timeri != NULL, return -ENXIO);
75	memset(&status, 0, sizeof(status));
76	status.tstamp = tu->tstamp;
77	status.resolution = snd_timer_resolution(tu->timeri);
78	status.lost = tu->timeri->lost;
79	status.overrun = tu->overrun;
80	spin_lock_irq(&tu->qlock);
81	status.queue = tu->qused;
82	spin_unlock_irq(&tu->qlock);
83	if (copy_to_user(_status, &status, sizeof(status)))
84		return -EFAULT;
85	return 0;
86}
87
88/*
89 */
90
91enum {
92	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
93	SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
94};
95
96static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
97{
98	void __user *argp = compat_ptr(arg);
99
100	switch (cmd) {
101	case SNDRV_TIMER_IOCTL_PVERSION:
102	case SNDRV_TIMER_IOCTL_TREAD:
103	case SNDRV_TIMER_IOCTL_GINFO:
104	case SNDRV_TIMER_IOCTL_GPARAMS:
105	case SNDRV_TIMER_IOCTL_GSTATUS:
106	case SNDRV_TIMER_IOCTL_SELECT:
107	case SNDRV_TIMER_IOCTL_PARAMS:
108	case SNDRV_TIMER_IOCTL_START:
109	case SNDRV_TIMER_IOCTL_START_OLD:
110	case SNDRV_TIMER_IOCTL_STOP:
111	case SNDRV_TIMER_IOCTL_STOP_OLD:
112	case SNDRV_TIMER_IOCTL_CONTINUE:
113	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
114	case SNDRV_TIMER_IOCTL_PAUSE:
115	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
116	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
117		return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
118	case SNDRV_TIMER_IOCTL_INFO32:
119		return snd_timer_user_info_compat(file, argp);
120	case SNDRV_TIMER_IOCTL_STATUS32:
121		return snd_timer_user_status_compat(file, argp);
122	}
123	return -ENOIOCTLCMD;
124}
125