diff options
Diffstat (limited to 'include/linux/cdrom.h')
| -rw-r--r-- | include/linux/cdrom.h | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h new file mode 100644 index 000000000..528271c60 --- /dev/null +++ b/include/linux/cdrom.h @@ -0,0 +1,317 @@ +/* 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 <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 for_data; + int (*exit)(struct cdrom_device_info *); + int mrw_mode_page; +}; + +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 (*media_changed) (struct cdrom_device_info *, int); + int (*tray_move) (struct cdrom_device_info *, int); + int (*lock_door) (struct cdrom_device_info *, int); + int (*select_speed) (struct cdrom_device_info *, int); + int (*select_disc) (struct cdrom_device_info *, int); + 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 *); + +/* driver specifications */ + const int capability; /* capability flags */ + /* handle uniform packets for scsi type devices (scsi,atapi) */ + int (*generic_packet) (struct cdrom_device_info *, + struct packet_command *); +}; + +/* the general block_device operations structure: */ +extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, + fmode_t mode); +extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode); +extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, + fmode_t mode, unsigned int cmd, unsigned long arg); +extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, + unsigned int clearing); +extern int cdrom_media_changed(struct cdrom_device_info *); + +extern int register_cdrom(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 */ |