/*
  Copyright (C) 2003, 2004, 2008, 2010 Rocky Bernstein <rocky@gnu.org>

  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 3 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, see <http://www.gnu.org/licenses/>.
*/

/* This file contains FreeBSD-specific code and implements low-level
   control of the CD drive. Culled initially I think from xine's or
   mplayer's FreeBSD code with lots of modifications.
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <cdio/sector.h>
#include "cdio_assert.h"
#include "cdio_private.h"

/*!
  For ioctl access /dev/acd0c is preferred over /dev/cd0c.
  For cam access /dev/cd0c is preferred. DEFAULT_CDIO_DEVICE and
  DEFAULT_FREEBSD_AM should be consistent. 
 */

#ifndef DEFAULT_CDIO_DEVICE
#define DEFAULT_CDIO_DEVICE "/dev/cd0c"
#endif

#ifndef DEFAULT_FREEBSD_AM
#define DEFAULT_FREEBSD_AM _AM_CAM
#endif

#include <string.h>

#ifdef HAVE_FREEBSD_CDROM

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <unistd.h>
#include <fcntl.h>

#ifdef HAVE_SYS_CDIO_H
# include <sys/cdio.h>
#endif

#ifndef CDIOCREADAUDIO
struct ioc_read_audio
{
        u_char address_format;
        union msf_lba address;
        int nframes;
        u_char* buffer;
};

#define CDIOCREADAUDIO _IOWR('c',31,struct ioc_read_audio)
#endif

#include <sys/cdrio.h>

#include <sys/stat.h>
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/param.h> /* for __FreeBSD_version */

#if (__FreeBSD_version < 500000) && (__FreeBSD_kernel_version < 500000)
#define DEVICE_POSTFIX "c"
#else
#define DEVICE_POSTFIX ""
#endif

#define HAVE_FREEBSD_CAM
#ifdef HAVE_FREEBSD_CAM
#include <camlib.h>

#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_pass.h>
#include <errno.h>
#define ERRCODE(s)	((((s)[2]&0x0F)<<16)|((s)[12]<<8)|((s)[13]))
#define EMEDIUMTYPE	EINVAL
#define	ENOMEDIUM	ENODEV
#define CREAM_ON_ERRNO(s)	do {			\
    switch ((s)[12])					\
    {	case 0x04:	errno=EAGAIN;	break;		\
	case 0x20:	errno=ENODEV;	break;		\
	case 0x21:	if ((s)[13]==0)	errno=ENOSPC;	\
			else		errno=EINVAL;	\
			break;				\
	case 0x30:	errno=EMEDIUMTYPE;  break;	\
	case 0x3A:	errno=ENOMEDIUM;    break;	\
    }							\
} while(0)
#endif /*HAVE_FREEBSD_CAM*/

#include <cdio/util.h>

#define TOTAL_TRACKS    ( p_env->tochdr.ending_track \
			- p_env->tochdr.starting_track + 1)
#define FIRST_TRACK_NUM (p_env->tochdr.starting_track)

typedef  enum {
  _AM_NONE,
  _AM_IOCTL,
  _AM_CAM,
  _AM_MMC_RDWR,
  _AM_MMC_RDWR_EXCL,
} access_mode_t;

typedef struct {
  /* Things common to all drivers like this. 
     This must be first. */
  generic_img_private_t gen; 

#ifdef HAVE_FREEBSD_CAM
  char *device;
  struct cam_device  *cam;
  union ccb	      ccb;
#endif

  access_mode_t access_mode;

  bool b_ioctl_init;
  bool b_cam_init;
  
  /* Track information */
  struct ioc_toc_header  tochdr;

  /* Entry info for each track. Add 1 for leadout. */
  struct ioc_read_toc_single_entry tocent[CDIO_CD_MAX_TRACKS+1];

} _img_private_t;

bool cdio_is_cdrom_freebsd_ioctl(char *drive, char *mnttype);

track_format_t get_track_format_freebsd_ioctl(const _img_private_t *env, 
					      track_t i_track);
bool get_track_green_freebsd_ioctl(const _img_private_t *env, 
				   track_t i_track);

driver_return_code_t eject_media_freebsd_ioctl (_img_private_t *p_env);
driver_return_code_t  eject_media_freebsd_cam (_img_private_t *p_env);

void get_drive_cap_freebsd_cam (const _img_private_t *p_env,
				cdio_drive_read_cap_t  *p_read_cap,
				cdio_drive_write_cap_t *p_write_cap,
				cdio_drive_misc_cap_t  *p_misc_cap);

int get_media_changed_freebsd (const void *p_user_data);

char *get_mcn_freebsd_ioctl (const _img_private_t *p_env);

void free_freebsd_cam (void *obj);

/*!
   Using the ioctl method, r nblocks of audio sectors from cd device
   into data starting from lsn.  Returns 0 if no error.
 */
int  read_audio_sectors_freebsd_ioctl (_img_private_t *env, void *data, 
				       lsn_t lsn, unsigned int nblocks);
/*! 
   Using the CAM method, reads nblocks of mode2 sectors from
   cd device using into data starting from lsn.  Returns 0 if no
   error.
*/
int  read_mode2_sector_freebsd_cam (_img_private_t *env, void *data, 
				    lsn_t lsn, bool b_form2);

/*! 
   Using the ioctl method, reads nblocks of mode2 sectors from
   cd device using into data starting from lsn.  Returns 0 if no
   error.
*/
int  read_mode2_sector_freebsd_ioctl (_img_private_t *env, void *data, 
				      lsn_t lsn, bool b_form2);

/*! 
   Using the CAM method, reads nblocks of mode2 form2 sectors from
   cd device using into data starting from lsn.  Returns 0 if no
   error.

   Note: if you want form1 sectors, the caller has to pick out the
   appropriate piece.
*/
int  read_mode2_sectors_freebsd_cam (_img_private_t *env, void *buf, 
				     lsn_t lsn, unsigned int nblocks);

bool read_toc_freebsd_ioctl (_img_private_t *env);

/*!
  Run a SCSI MMC command. 
 
  p_user_data   internal CD structure.
  i_timeout     time in milliseconds we will wait for the command
                to complete. If this value is -1, use the default 
		time-out value.
  i_cdb	        Size of p_cdb
  p_cdb	        CDB bytes. 
  e_direction	direction the transfer is to go.
  i_buf	        Size of buffer
  p_buf	        Buffer for data, both sending and receiving

  Return 0 if no error.
 */
int run_mmc_cmd_freebsd_cam( void *p_user_data, 
			     unsigned int i_timeout_ms,
			     unsigned int i_cdb, 
			     const mmc_cdb_t *p_cdb, 
			     cdio_mmc_direction_t e_direction, 
			     unsigned int i_buf, 
			     /*in/out*/ void *p_buf );

/*!
   Return the size of the CD in logical block address (LBA) units.
 */
lsn_t get_disc_last_lsn_freebsd_ioctl (_img_private_t *_obj);

bool init_freebsd_cam (_img_private_t *env);
void free_freebsd_cam (void *user_data);

/** Try to obtain SCSI address tuple of path.
    @return  1 is success , 0 is failure
*/
int obtain_scsi_adr_freebsd_cam(char *path, 
                                int *bus_no, int *host_no, int *channel_no,
                                int *target_no, int *lun_no);


#endif /*HAVE_FREEBSD_CDROM*/
