/*  cdrdao - write audio CD-Rs in disc-at-once mode
 *
 *  Copyright (C) 1999  Andreas Mueller <mueller@daneb.ping.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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
/*
 * $Log: ScsiIf-common.cc,v $
 * Revision 1.3  2004/04/13 01:23:44  poolshark
 * Cleanup of scglib selection. Fixed without-scglib option. Default build of scsilib was problematic on older systems
 *
 * Revision 1.2  2004/03/23 18:46:07  poolshark
 * MMC autodetect mode
 *
 * Revision 1.1.1.1  2000/02/05 01:36:55  llanero
 * Uploaded cdrdao 1.1.3 with pre10 patch applied.
 *
 */

// checks if unit is ready
// return: 0: OK, ready
//         1: not ready (busy)
//         2: not ready, no disk in drive
//         3: scsi command failed



int ScsiIf::testUnitReady()
{
  unsigned char cmd[6];
  const unsigned char *senseData;
  int senseLen;
  int ret = 0;

  memset(cmd, 0, 6);

  switch (sendCmd(cmd, 6, NULL, 0, NULL, 0, 0)) {
  case 1:
    ret = 3;
    break;

  case 2:
    senseData = getSense(senseLen);

    switch (senseData[2] & 0x0f) {
    case 0x02: // Not ready
      switch (senseData[12]) {
      case 0x3a: // medium not present
	ret = 2;
	break;

      default:
	ret = 1;
	break;
      }
      break;

    case 0x06: // Unit attention
      ret = 0;
      break;

    default:
      ret = 3;
      break;
    }
  }

  return ret;
}

bool ScsiIf::checkMmc(bool *cd_r_read,  bool *cd_r_write,
                      bool *cd_rw_read, bool *cd_rw_write)
{
#ifdef USE_SCGLIB
  static const int MODE_SENSE_G1_CMD = 0x5a;
  static const int MODE_MAX_SIZE = 256;
  static const int MODE_PAGE_HEADER_SIZE = 8;
  static const int MODE_CD_CAP_PAGE = 0x2a;

  unsigned char mode[MODE_MAX_SIZE];
  memset(mode, 0, sizeof(mode));

  // First, read header of mode page 0x2A, to figure out its exact length
  struct scsi_g1cdb cmd;
  memset(&cmd, 0, sizeof(cmd));
  cmd.cmd = MODE_SENSE_G1_CMD; // MODE SENSE(10)
  cmd.lun = scg_lun(impl_->scgp_);
  cmd.addr[0] = MODE_CD_CAP_PAGE;
  g1_cdblen(&cmd, MODE_PAGE_HEADER_SIZE);
  if (sendCmd((unsigned char*)&cmd, SC_G1_CDBLEN, 0, 0, mode,
              MODE_PAGE_HEADER_SIZE) != 0) {
    return false;
  }

  int len = ((mode[0] << 8) + mode[1]) + 2; // (+2) is for address field itself
  if (len > MODE_MAX_SIZE) len = MODE_MAX_SIZE;

  // Now we have the length of page 0x2a, read whole page
  memset(mode, 0, MODE_PAGE_HEADER_SIZE);
  memset(&cmd, 0, sizeof(cmd));
  cmd.cmd = MODE_SENSE_G1_CMD; // MODE SENSE(10)
  cmd.lun = scg_lun(impl_->scgp_);
  cmd.addr[0] = MODE_CD_CAP_PAGE;
  g1_cdblen(&cmd, len);
  if (sendCmd((unsigned char*)&cmd, SC_G1_CDBLEN, 0, 0, mode, len) != 0) {
    return false;
  }

  struct cd_mode_page_2A *mp = (struct cd_mode_page_2A*)(mode + 8);

  *cd_r_read   = mp->cd_r_read;
  *cd_r_write  = mp->cd_r_write;
  *cd_rw_read  = mp->cd_rw_read;
  *cd_rw_write = mp->cd_rw_write;
  return true;

#else
  *cd_r_read   = false;
  *cd_r_write  = false;
  *cd_rw_read  = false;
  *cd_rw_write = false;
  return true;
 
#endif
}