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/* SPDX-License-Identifier: GPL-2.0 */ /* * -- <linux/cdrom.h> * General header file for linux CD-ROM drivers * Copyright (C) 1992 David Giller, rafetmad@oxy.edu * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de * 1996 David van Leeuwen, david@tm.tno.nl * 1997, 1998 Erik Andersen, andersee@debian.org * 1998-2002 Jens Axboe, axboe@suse.de */ #ifndef _LINUX_CDROM_H #define _LINUX_CDROM_H #include <linux/fs.h> /* not really needed, later.. */ #include <linux/list.h> #include <linux/blkdev.h> #include <scsi/scsi_common.h> #include <uapi/linux/cdrom.h> struct packet_command { unsigned char cmd[CDROM_PACKET_SIZE]; unsigned char *buffer; unsigned int buflen; int stat; struct scsi_sense_hdr *sshdr; unsigned char data_direction; int quiet; int timeout; void *reserved[1]; }; /* * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA */ #define CDDA_OLD 0 /* old style */ #define CDDA_BPC_SINGLE 1 /* single frame block pc */ #define CDDA_BPC_FULL 2 /* multi frame block pc */ /* Uniform cdrom data structures for cdrom.c */ struct cdrom_device_info { const struct cdrom_device_ops *ops; /* link to device_ops */ struct list_head list; /* linked list of all device_info */ struct gendisk *disk; /* matching block layer disk */ void *handle; /* driver-dependent data */ /* specifications */ int mask; /* mask of capability: disables them */ int speed; /* maximum speed for reading data */ int capacity; /* number of discs in jukebox */ /* device-related storage */ unsigned int options : 30; /* options flags */ unsigned mc_flags : 2; /* media change buffer flags */ unsigned int vfs_events; /* cached events for vfs path */ unsigned int ioctl_events; /* cached events for ioctl path */ int use_count; /* number of times device opened */ char name[20]; /* name of the device type */ /* per-device flags */ __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */ __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */ __u8 reserved : 5; /* not used yet */ int cdda_method; /* see flags */ __u8 last_sense; __u8 media_written; /* dirty flag, DVD+RW bookkeeping */ unsigned short mmc3_profile; /* current MMC3 profile */ int (*exit)(struct cdrom_device_info *); int mrw_mode_page; bool opened_for_data; __s64 last_media_change_ms; }; struct cdrom_device_ops { /* routines */ int (*open) (struct cdrom_device_info *, int); void (*release) (struct cdrom_device_info *); int (*drive_status) (struct cdrom_device_info *, int); unsigned int (*check_events) (struct cdrom_device_info *cdi, unsigned int clearing, int slot); int (*tray_move) (struct cdrom_device_info *, int); int (*lock_door) (struct cdrom_device_info *, int); int (*select_speed) (struct cdrom_device_info *, unsigned long); int (*get_last_session) (struct cdrom_device_info *, struct cdrom_multisession *); int (*get_mcn) (struct cdrom_device_info *, struct cdrom_mcn *); /* hard reset device */ int (*reset) (struct cdrom_device_info *); /* play stuff */ int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *); /* handle uniform packets for scsi type devices (scsi,atapi) */ int (*generic_packet) (struct cdrom_device_info *, struct packet_command *); int (*read_cdda_bpc)(struct cdrom_device_info *cdi, void __user *ubuf, u32 lba, u32 nframes, u8 *last_sense); /* driver specifications */ const int capability; /* capability flags */ }; int cdrom_multisession(struct cdrom_device_info *cdi, struct cdrom_multisession *info); int cdrom_read_tocentry(struct cdrom_device_info *cdi, struct cdrom_tocentry *entry); /* the general block_device operations structure: */ int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode); void cdrom_release(struct cdrom_device_info *cdi); int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, unsigned int cmd, unsigned long arg); extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, unsigned int clearing); extern int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi); extern void unregister_cdrom(struct cdrom_device_info *cdi); typedef struct { int data; int audio; int cdi; int xa; long error; } tracktype; extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written); extern int cdrom_number_of_slots(struct cdrom_device_info *cdi); extern int cdrom_mode_select(struct cdrom_device_info *cdi, struct packet_command *cgc); extern int cdrom_mode_sense(struct cdrom_device_info *cdi, struct packet_command *cgc, int page_code, int page_control); extern void init_cdrom_command(struct packet_command *cgc, void *buffer, int len, int type); extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, struct packet_command *cgc); /* The SCSI spec says there could be 256 slots. */ #define CDROM_MAX_SLOTS 256 struct cdrom_mechstat_header { #if defined(__BIG_ENDIAN_BITFIELD) __u8 fault : 1; __u8 changer_state : 2; __u8 curslot : 5; __u8 mech_state : 3; __u8 door_open : 1; __u8 reserved1 : 4; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 curslot : 5; __u8 changer_state : 2; __u8 fault : 1; __u8 reserved1 : 4; __u8 door_open : 1; __u8 mech_state : 3; #endif __u8 curlba[3]; __u8 nslots; __u16 slot_tablelen; }; struct cdrom_slot { #if defined(__BIG_ENDIAN_BITFIELD) __u8 disc_present : 1; __u8 reserved1 : 6; __u8 change : 1; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 change : 1; __u8 reserved1 : 6; __u8 disc_present : 1; #endif __u8 reserved2[3]; }; struct cdrom_changer_info { struct cdrom_mechstat_header hdr; struct cdrom_slot slots[CDROM_MAX_SLOTS]; }; typedef enum { mechtype_caddy = 0, mechtype_tray = 1, mechtype_popup = 2, mechtype_individual_changer = 4, mechtype_cartridge_changer = 5 } mechtype_t; typedef struct { #if defined(__BIG_ENDIAN_BITFIELD) __u8 ps : 1; __u8 reserved1 : 1; __u8 page_code : 6; __u8 page_length; __u8 reserved2 : 1; __u8 bufe : 1; __u8 ls_v : 1; __u8 test_write : 1; __u8 write_type : 4; __u8 multi_session : 2; /* or border, DVD */ __u8 fp : 1; __u8 copy : 1; __u8 track_mode : 4; __u8 reserved3 : 4; __u8 data_block_type : 4; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 page_code : 6; __u8 reserved1 : 1; __u8 ps : 1; __u8 page_length; __u8 write_type : 4; __u8 test_write : 1; __u8 ls_v : 1; __u8 bufe : 1; __u8 reserved2 : 1; __u8 track_mode : 4; __u8 copy : 1; __u8 fp : 1; __u8 multi_session : 2; /* or border, DVD */ __u8 data_block_type : 4; __u8 reserved3 : 4; #endif __u8 link_size; __u8 reserved4; #if defined(__BIG_ENDIAN_BITFIELD) __u8 reserved5 : 2; __u8 app_code : 6; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 app_code : 6; __u8 reserved5 : 2; #endif __u8 session_format; __u8 reserved6; __be32 packet_size; __u16 audio_pause; __u8 mcn[16]; __u8 isrc[16]; __u8 subhdr0; __u8 subhdr1; __u8 subhdr2; __u8 subhdr3; } __attribute__((packed)) write_param_page; struct modesel_head { __u8 reserved1; __u8 medium; __u8 reserved2; __u8 block_desc_length; __u8 density; __u8 number_of_blocks_hi; __u8 number_of_blocks_med; __u8 number_of_blocks_lo; __u8 reserved3; __u8 block_length_hi; __u8 block_length_med; __u8 block_length_lo; }; typedef struct { __u16 report_key_length; __u8 reserved1; __u8 reserved2; #if defined(__BIG_ENDIAN_BITFIELD) __u8 type_code : 2; __u8 vra : 3; __u8 ucca : 3; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 ucca : 3; __u8 vra : 3; __u8 type_code : 2; #endif __u8 region_mask; __u8 rpc_scheme; __u8 reserved3; } rpc_state_t; struct event_header { __be16 data_len; #if defined(__BIG_ENDIAN_BITFIELD) __u8 nea : 1; __u8 reserved1 : 4; __u8 notification_class : 3; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 notification_class : 3; __u8 reserved1 : 4; __u8 nea : 1; #endif __u8 supp_event_class; }; struct media_event_desc { #if defined(__BIG_ENDIAN_BITFIELD) __u8 reserved1 : 4; __u8 media_event_code : 4; __u8 reserved2 : 6; __u8 media_present : 1; __u8 door_open : 1; #elif defined(__LITTLE_ENDIAN_BITFIELD) __u8 media_event_code : 4; __u8 reserved1 : 4; __u8 door_open : 1; __u8 media_present : 1; __u8 reserved2 : 6; #endif __u8 start_slot; __u8 end_slot; }; extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med); static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f) { lba += CD_MSF_OFFSET; lba &= 0xffffff; /* negative lbas use only 24 bits */ *m = lba / (CD_SECS * CD_FRAMES); lba %= (CD_SECS * CD_FRAMES); *s = lba / CD_FRAMES; *f = lba % CD_FRAMES; } static inline int msf_to_lba(u8 m, u8 s, u8 f) { return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; } #endif /* _LINUX_CDROM_H */