/*
 * This file is part of WorkMan, the civilized CD player library
 * Copyright (C) 1991-1997 by Steven Grimm <koreth@midwinter.com>
 * Copyright (C) by Dirk Försterling <milliByte@DeathsDoor.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *
 * SCO Openserver R5 specific. Derived from the KSCD plat_scor5.c
 *
 */

#if defined(M_UNIX) || defined(__M_UNIX)

#include "include/wm_config.h"

#include <sys/types.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/scsi.h>
#include <sys/scsicmd.h>
#include <errno.h>
#include <macros.h>

#include "include/wm_struct.h"
#include "include/gen_scsi.h"
#include "include/wm_cdtext.h"

#define WM_MSG_CLASS WM_MSG_CLASS_PLATFORM

#define SENSE_SZ EXTD_SENSE_LEN

void *malloc();
char *strchr();

int	min_volume = 0;
int	max_volume = 255;

/*
 * platformspecific internal function
 */
static int
create_cdrom_node(char *dev_name)
{
  char pass_through[100];
  int file_des;
  struct stat sbuf;
  int err;
  int ccode;


  strncpy(pass_through, dev_name, sizeof(pass_through)-2);
  pass_through[sizeof(pass_through) - 2] = '\0';
  strcat(pass_through, "p" );

  if (setreuid(-1,0) < 0)
    {
      perror("setregid/setreuid/access");
      return -1;
    }

  ccode = access(pass_through, F_OK);

  if (ccode < 0)
    {

      if (stat(dev_name, &sbuf) < 0)
	{
	  perror("Call to get pass-through device number failed");
	  return -1;
	}

      if (mknod(pass_through, (S_IFCHR | S_IREAD | S_IWRITE),
		sbuf.st_rdev) < 0)
	{
	  perror("Unable to make pass-through node");
	  return -1;
	}

      if (chown(pass_through, 0 , 0) < 0)
	{
	  perror("chown");
	  return -1;
	}

      if (chmod(pass_through, 0660 ) < 0)
	{
	  perror("chmod");
	  return -1;
	}
    }

  file_des = open( pass_through, O_RDONLY);
  err = errno;

  /*
  if ( (setreuid(-1,getuid()) < 0) || (setregid(-1,getgid()) < 0) )
    {
      perror("setreuid/setregid");
      exit(1);
    }

  */

  errno = err;
  return file_des;
} /* create_cdrom_node() */


/*
 * Initialize the drive.  A no-op for the generic driver.
 */
int
gen_init(struct wm_drive *d)
{
  return (0);
} /* gen_init() */

/*
 * Open the CD and figure out which kind of drive is attached.
 */
int
gen_open(struct wm_drive *d)
{
	if (d->fd > -1) {		/* Device already open? */
		wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "gen_open(): [device is open (fd=%d)]\n", d->fd);
		return 0;
    }

	d->fd = create_cdrom_node(d->cd_device); /* this will do open */
	if (d->fd < 0) {
      	if (errno == EACCES) {
		} else if (errno != EINTR) {
			perror(d->cd_device);
        	return -6;
		}

		/* cannot access CDROM device */
		return -1;
	}

	return 0;
} /* gen_open */

/*
 * Send a SCSI command out the bus.
 */
int
gen_scsi(struct wm_drive *d, unsigned char *xcdb, int cdblen,
	char *retbuf, int retbuflen, int getreply)
{
  int ccode;
  int file_des = d->fd;
  unsigned char sense_buffer[ SENSE_SZ ];

  /* getreply == 1 is read, == 0 is write */

  struct scsicmd2 sb;	/* Use command with automatic sense */

  if (cdblen > SCSICMDLEN)
    {
      fprintf(stderr,"Cannot handle longer commands than %d bytes.\n", SCSICMDLEN);
      exit(-1);
    }

  /* Get the command */
  memcpy(sb.cmd.cdb, xcdb, cdblen);
  sb.cmd.cdb_len = cdblen;

  /* Point to data buffer */
  sb.cmd.data_ptr = retbuf;
  sb.cmd.data_len = retbuflen;

  /* Is this write or read ? */
  sb.cmd.is_write = (getreply==1) ? 0 : 1;

  /* Zero out return status fields */
  sb.cmd.host_sts = 0;
  sb.cmd.target_sts = 0;

  /* Set up for possible sense info */

  sb.sense_ptr = sense_buffer;
  sb.sense_len = sizeof(sense_buffer);

  ccode =  ioctl(file_des, SCSIUSERCMD2,  &sb);

  if ( sb.cmd.target_sts != 02 )
    return ccode;

  return 0;
} /* gen_scsi() */

int
gen_close( struct wm_drive *d )
{
  if(d->fd != -1) {
    wm_lib_message(WM_MSG_LEVEL_DEBUG|WM_MSG_CLASS, "closing the device\n");
    close(d->fd);
    d->fd = -1;
  }
  return 0;
}

void
keep_cd_open() { }

/*
 * Get the current status of the drive: the current play mode, the absolute
 * position from start of disc (in frames), and the current track and index
 * numbers if the CD is playing or paused.
 */
int
gen_get_drive_status(wm_drive *d, int oldmode, int *mode,
		     int *pos, int *track, int *index)
{
  return (wm_scsi2_get_drive_status(d, oldmode, mode, pos, track, index));
} /* gen_get_drive_status() */

/*
 * Get the number of tracks on the CD.
 */
int
gen_get_trackcount(struct wm_drive *d, int *tracks)
{
  return (wm_scsi2_get_trackcount(d, tracks));
} /* gen_get_trackcount() */


/*
 * Get the start time and mode (data or audio) of a track.
 */
int
gen_get_trackinfo(struct wm_drive *d, int track, int *data, int *startframe)
{
  return (wm_scsi2_get_trackinfo(d, track, data, startframe));
} /* gen_get_trackinfo() */

/*
 * Get the number of frames on the CD.
 */
int
gen_get_cdlen(struct wm_drive *d, int *frames)
{
  return (wm_scsi2_get_cdlen(d, frames));
} /* gen_get_cdlen() */


/*
 * Play the CD from one position to another (both in frames.)
 */
int
gen_play(struct wm_drive *d, int start, int end)
{
  return (wm_scsi2_play(d, start, end));
} /* gen_play() */

/*
 * Pause the CD.
 */
int
gen_pause( struct wm_drive *d )
{
  return (wm_scsi2_pause(d));
} /* gen_pause() */

/*
 * Resume playing the CD (assuming it was paused.)
 */
int
gen_resume( struct wm_drive *d )
{
  return (wm_scsi2_resume(d));
} /* gen_resume() */

/*
 * Stop the CD.
 */
int
gen_stop(struct wm_drive *d)
{
  return (wm_scsi2_stop(d));
} /* gen_stop() */

/*
 * Eject the current CD, if there is one.
 */
int
gen_eject(struct wm_drive *d)
{
  int stat;

  stat = wm_scsi2_eject(d);
  wm_susleep(1000);
  return (stat);
} /* gen_eject() */


int
gen_closetray(struct wm_drive *d)
{
  return(wm_scsi2_closetray(d));
} /* gen_closetray() */


/*
 * Set the volume level for the left and right channels.  Their values
 * range from 0 to 100.
 */
int
gen_set_volume(struct wm_drive *d, int left, int right)
{
  return (wm_scsi2_set_volume(d, left, right));
} /* gen_set_volume() */

/*
 * Read the initial volume from the drive, if available.  Each channel
 * ranges from 0 to 100, with -1 indicating data not available.
 */
int
gen_get_volume(struct wm_drive *d, int *left, int *right)
{
	return (wm_scsi2_get_volume(d, left, right));
} /* gen_get_volume() */

#endif /* M_UNIX */