323 lines
9.0 KiB
C
323 lines
9.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* -- <linux/cdrom.h>
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* General header file for linux CD-ROM drivers
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* Copyright (C) 1992 David Giller, rafetmad@oxy.edu
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* 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de
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* 1996 David van Leeuwen, david@tm.tno.nl
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* 1997, 1998 Erik Andersen, andersee@debian.org
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* 1998-2002 Jens Axboe, axboe@suse.de
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*/
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#ifndef _LINUX_CDROM_H
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#define _LINUX_CDROM_H
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#include <linux/fs.h> /* not really needed, later.. */
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#include <linux/list.h>
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#include <scsi/scsi_common.h>
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#include <uapi/linux/cdrom.h>
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struct packet_command
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{
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unsigned char cmd[CDROM_PACKET_SIZE];
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unsigned char *buffer;
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unsigned int buflen;
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int stat;
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struct scsi_sense_hdr *sshdr;
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unsigned char data_direction;
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int quiet;
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int timeout;
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void *reserved[1];
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};
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/*
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* _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
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*/
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#define CDDA_OLD 0 /* old style */
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#define CDDA_BPC_SINGLE 1 /* single frame block pc */
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#define CDDA_BPC_FULL 2 /* multi frame block pc */
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/* Uniform cdrom data structures for cdrom.c */
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struct cdrom_device_info {
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const struct cdrom_device_ops *ops; /* link to device_ops */
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struct list_head list; /* linked list of all device_info */
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struct gendisk *disk; /* matching block layer disk */
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void *handle; /* driver-dependent data */
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/* specifications */
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int mask; /* mask of capability: disables them */
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int speed; /* maximum speed for reading data */
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int capacity; /* number of discs in jukebox */
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/* device-related storage */
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unsigned int options : 30; /* options flags */
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unsigned mc_flags : 2; /* media change buffer flags */
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unsigned int vfs_events; /* cached events for vfs path */
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unsigned int ioctl_events; /* cached events for ioctl path */
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int use_count; /* number of times device opened */
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char name[20]; /* name of the device type */
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/* per-device flags */
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__u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */
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__u8 keeplocked : 1; /* CDROM_LOCKDOOR status */
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__u8 reserved : 5; /* not used yet */
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int cdda_method; /* see flags */
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__u8 last_sense;
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__u8 media_written; /* dirty flag, DVD+RW bookkeeping */
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unsigned short mmc3_profile; /* current MMC3 profile */
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int for_data;
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int (*exit)(struct cdrom_device_info *);
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int mrw_mode_page;
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};
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struct cdrom_device_ops {
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/* routines */
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int (*open) (struct cdrom_device_info *, int);
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void (*release) (struct cdrom_device_info *);
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int (*drive_status) (struct cdrom_device_info *, int);
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unsigned int (*check_events) (struct cdrom_device_info *cdi,
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unsigned int clearing, int slot);
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int (*media_changed) (struct cdrom_device_info *, int);
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int (*tray_move) (struct cdrom_device_info *, int);
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int (*lock_door) (struct cdrom_device_info *, int);
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int (*select_speed) (struct cdrom_device_info *, int);
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int (*select_disc) (struct cdrom_device_info *, int);
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int (*get_last_session) (struct cdrom_device_info *,
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struct cdrom_multisession *);
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int (*get_mcn) (struct cdrom_device_info *,
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struct cdrom_mcn *);
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/* hard reset device */
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int (*reset) (struct cdrom_device_info *);
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/* play stuff */
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int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
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/* driver specifications */
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const int capability; /* capability flags */
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/* handle uniform packets for scsi type devices (scsi,atapi) */
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int (*generic_packet) (struct cdrom_device_info *,
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struct packet_command *);
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};
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int cdrom_multisession(struct cdrom_device_info *cdi,
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struct cdrom_multisession *info);
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int cdrom_read_tocentry(struct cdrom_device_info *cdi,
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struct cdrom_tocentry *entry);
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/* the general block_device operations structure: */
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extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
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fmode_t mode);
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extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
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extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
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fmode_t mode, unsigned int cmd, unsigned long arg);
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extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
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unsigned int clearing);
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extern int cdrom_media_changed(struct cdrom_device_info *);
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extern int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi);
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extern void unregister_cdrom(struct cdrom_device_info *cdi);
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typedef struct {
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int data;
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int audio;
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int cdi;
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int xa;
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long error;
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} tracktype;
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extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
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extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
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extern int cdrom_mode_select(struct cdrom_device_info *cdi,
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struct packet_command *cgc);
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extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
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struct packet_command *cgc,
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int page_code, int page_control);
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extern void init_cdrom_command(struct packet_command *cgc,
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void *buffer, int len, int type);
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extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
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struct packet_command *cgc);
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/* The SCSI spec says there could be 256 slots. */
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#define CDROM_MAX_SLOTS 256
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struct cdrom_mechstat_header {
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 fault : 1;
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__u8 changer_state : 2;
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__u8 curslot : 5;
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__u8 mech_state : 3;
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__u8 door_open : 1;
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__u8 reserved1 : 4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 curslot : 5;
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__u8 changer_state : 2;
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__u8 fault : 1;
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__u8 reserved1 : 4;
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__u8 door_open : 1;
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__u8 mech_state : 3;
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#endif
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__u8 curlba[3];
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__u8 nslots;
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__u16 slot_tablelen;
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};
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struct cdrom_slot {
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 disc_present : 1;
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__u8 reserved1 : 6;
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__u8 change : 1;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 change : 1;
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__u8 reserved1 : 6;
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__u8 disc_present : 1;
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#endif
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__u8 reserved2[3];
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};
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struct cdrom_changer_info {
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struct cdrom_mechstat_header hdr;
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struct cdrom_slot slots[CDROM_MAX_SLOTS];
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};
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typedef enum {
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mechtype_caddy = 0,
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mechtype_tray = 1,
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mechtype_popup = 2,
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mechtype_individual_changer = 4,
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mechtype_cartridge_changer = 5
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} mechtype_t;
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typedef struct {
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 ps : 1;
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__u8 reserved1 : 1;
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__u8 page_code : 6;
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__u8 page_length;
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__u8 reserved2 : 1;
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__u8 bufe : 1;
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__u8 ls_v : 1;
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__u8 test_write : 1;
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__u8 write_type : 4;
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__u8 multi_session : 2; /* or border, DVD */
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__u8 fp : 1;
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__u8 copy : 1;
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__u8 track_mode : 4;
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__u8 reserved3 : 4;
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__u8 data_block_type : 4;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 page_code : 6;
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__u8 reserved1 : 1;
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__u8 ps : 1;
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__u8 page_length;
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__u8 write_type : 4;
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__u8 test_write : 1;
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__u8 ls_v : 1;
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__u8 bufe : 1;
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__u8 reserved2 : 1;
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__u8 track_mode : 4;
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__u8 copy : 1;
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__u8 fp : 1;
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__u8 multi_session : 2; /* or border, DVD */
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__u8 data_block_type : 4;
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__u8 reserved3 : 4;
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#endif
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__u8 link_size;
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__u8 reserved4;
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 reserved5 : 2;
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__u8 app_code : 6;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 app_code : 6;
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__u8 reserved5 : 2;
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#endif
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__u8 session_format;
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__u8 reserved6;
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__be32 packet_size;
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__u16 audio_pause;
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__u8 mcn[16];
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__u8 isrc[16];
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__u8 subhdr0;
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__u8 subhdr1;
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__u8 subhdr2;
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__u8 subhdr3;
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} __attribute__((packed)) write_param_page;
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struct modesel_head
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{
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__u8 reserved1;
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__u8 medium;
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__u8 reserved2;
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__u8 block_desc_length;
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__u8 density;
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__u8 number_of_blocks_hi;
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__u8 number_of_blocks_med;
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__u8 number_of_blocks_lo;
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__u8 reserved3;
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__u8 block_length_hi;
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__u8 block_length_med;
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__u8 block_length_lo;
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};
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typedef struct {
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__u16 report_key_length;
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__u8 reserved1;
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__u8 reserved2;
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 type_code : 2;
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__u8 vra : 3;
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__u8 ucca : 3;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 ucca : 3;
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__u8 vra : 3;
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__u8 type_code : 2;
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#endif
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__u8 region_mask;
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__u8 rpc_scheme;
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__u8 reserved3;
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} rpc_state_t;
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struct event_header {
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__be16 data_len;
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 nea : 1;
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__u8 reserved1 : 4;
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__u8 notification_class : 3;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 notification_class : 3;
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__u8 reserved1 : 4;
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__u8 nea : 1;
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#endif
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__u8 supp_event_class;
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};
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struct media_event_desc {
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#if defined(__BIG_ENDIAN_BITFIELD)
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__u8 reserved1 : 4;
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__u8 media_event_code : 4;
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__u8 reserved2 : 6;
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__u8 media_present : 1;
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__u8 door_open : 1;
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#elif defined(__LITTLE_ENDIAN_BITFIELD)
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__u8 media_event_code : 4;
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__u8 reserved1 : 4;
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__u8 door_open : 1;
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__u8 media_present : 1;
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__u8 reserved2 : 6;
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#endif
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__u8 start_slot;
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__u8 end_slot;
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};
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extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
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static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
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{
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lba += CD_MSF_OFFSET;
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lba &= 0xffffff; /* negative lbas use only 24 bits */
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*m = lba / (CD_SECS * CD_FRAMES);
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lba %= (CD_SECS * CD_FRAMES);
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*s = lba / CD_FRAMES;
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*f = lba % CD_FRAMES;
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}
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static inline int msf_to_lba(u8 m, u8 s, u8 f)
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{
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return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
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}
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#endif /* _LINUX_CDROM_H */
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