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	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
 60struct 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
 69static 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
 94enum {
 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
 99static 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}