/*
   *   32bit -> 64bit ioctl wrapper for raw MIDI API
   *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
   *
   *   This program 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 program 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
   *
   */
  
  /* This file included from rawmidi.c */
  
  #include <linux/compat.h>

  struct snd_rawmidi_params32 {

  	s32 stream;
  	u32 buffer_size;
  	u32 avail_min;
  	unsigned int no_active_sensing; /* avoid bit-field */
  	unsigned char reserved[16];
  } __attribute__((packed));

  static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
  					   struct snd_rawmidi_params32 __user *src)

  {

  	struct snd_rawmidi_params params;

  	unsigned int val;
  
  	if (rfile->output == NULL)
  		return -EINVAL;
  	if (get_user(params.stream, &src->stream) ||
  	    get_user(params.buffer_size, &src->buffer_size) ||
  	    get_user(params.avail_min, &src->avail_min) ||
  	    get_user(val, &src->no_active_sensing))
  		return -EFAULT;
  	params.no_active_sensing = val;
  	switch (params.stream) {
  	case SNDRV_RAWMIDI_STREAM_OUTPUT:
  		return snd_rawmidi_output_params(rfile->output, &params);
  	case SNDRV_RAWMIDI_STREAM_INPUT:
  		return snd_rawmidi_input_params(rfile->input, &params);
  	}
  	return -EINVAL;
  }

  struct snd_rawmidi_status32 {

  	s32 stream;
  	struct compat_timespec tstamp;
  	u32 avail;
  	u32 xruns;
  	unsigned char reserved[16];
  } __attribute__((packed));

  static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
  					   struct snd_rawmidi_status32 __user *src)

  {
  	int err;

  	struct snd_rawmidi_status status;

  
  	if (rfile->output == NULL)
  		return -EINVAL;
  	if (get_user(status.stream, &src->stream))
  		return -EFAULT;
  
  	switch (status.stream) {
  	case SNDRV_RAWMIDI_STREAM_OUTPUT:
  		err = snd_rawmidi_output_status(rfile->output, &status);
  		break;
  	case SNDRV_RAWMIDI_STREAM_INPUT:
  		err = snd_rawmidi_input_status(rfile->input, &status);
  		break;
  	default:
  		return -EINVAL;
  	}
  	if (err < 0)
  		return err;
  
  	if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
  	    put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
  	    put_user(status.avail, &src->avail) ||
  	    put_user(status.xruns, &src->xruns))
  		return -EFAULT;
  
  	return 0;
  }
  
  enum {

  	SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
  	SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),

  };
  
  static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
  {

  	struct snd_rawmidi_file *rfile;

  	void __user *argp = compat_ptr(arg);
  
  	rfile = file->private_data;
  	switch (cmd) {
  	case SNDRV_RAWMIDI_IOCTL_PVERSION:
  	case SNDRV_RAWMIDI_IOCTL_INFO:
  	case SNDRV_RAWMIDI_IOCTL_DROP:
  	case SNDRV_RAWMIDI_IOCTL_DRAIN:
  		return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
  	case SNDRV_RAWMIDI_IOCTL_PARAMS32:
  		return snd_rawmidi_ioctl_params_compat(rfile, argp);
  	case SNDRV_RAWMIDI_IOCTL_STATUS32:
  		return snd_rawmidi_ioctl_status_compat(rfile, argp);
  	}
  	return -ENOIOCTLCMD;
  }