3 * General header file for linux CD-ROM drivers
4 * Copyright (C) 1992 David Giller, rafetmad@oxy.edu
5 * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de
6 * 1996 David van Leeuwen, david@tm.tno.nl
7 * 1997, 1998 Erik Andersen, andersee@debian.org
8 * 1998-2002 Jens Axboe, axboe@suse.de
10 #ifndef _LINUX_CDROM_H
11 #define _LINUX_CDROM_H
13 #include <linux/fs.h> /* not really needed, later.. */
14 #include <linux/list.h>
15 #include <uapi/linux/cdrom.h>
19 unsigned char cmd[CDROM_PACKET_SIZE];
20 unsigned char *buffer;
23 struct request_sense *sense;
24 unsigned char data_direction;
31 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
33 #define CDDA_OLD 0 /* old style */
34 #define CDDA_BPC_SINGLE 1 /* single frame block pc */
35 #define CDDA_BPC_FULL 2 /* multi frame block pc */
37 /* Uniform cdrom data structures for cdrom.c */
38 struct cdrom_device_info {
39 struct cdrom_device_ops *ops; /* link to device_ops */
40 struct list_head list; /* linked list of all device_info */
41 struct gendisk *disk; /* matching block layer disk */
42 void *handle; /* driver-dependent data */
44 int mask; /* mask of capability: disables them */
45 int speed; /* maximum speed for reading data */
46 int capacity; /* number of discs in jukebox */
47 /* device-related storage */
48 unsigned int options : 30; /* options flags */
49 unsigned mc_flags : 2; /* media change buffer flags */
50 unsigned int vfs_events; /* cached events for vfs path */
51 unsigned int ioctl_events; /* cached events for ioctl path */
52 int use_count; /* number of times device opened */
53 char name[20]; /* name of the device type */
54 /* per-device flags */
55 __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */
56 __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */
57 __u8 reserved : 5; /* not used yet */
58 int cdda_method; /* see flags */
60 __u8 media_written; /* dirty flag, DVD+RW bookkeeping */
61 unsigned short mmc3_profile; /* current MMC3 profile */
63 int (*exit)(struct cdrom_device_info *);
67 struct cdrom_device_ops {
69 int (*open) (struct cdrom_device_info *, int);
70 void (*release) (struct cdrom_device_info *);
71 int (*drive_status) (struct cdrom_device_info *, int);
72 unsigned int (*check_events) (struct cdrom_device_info *cdi,
73 unsigned int clearing, int slot);
74 int (*media_changed) (struct cdrom_device_info *, int);
75 int (*tray_move) (struct cdrom_device_info *, int);
76 int (*lock_door) (struct cdrom_device_info *, int);
77 int (*select_speed) (struct cdrom_device_info *, int);
78 int (*select_disc) (struct cdrom_device_info *, int);
79 int (*get_last_session) (struct cdrom_device_info *,
80 struct cdrom_multisession *);
81 int (*get_mcn) (struct cdrom_device_info *,
83 /* hard reset device */
84 int (*reset) (struct cdrom_device_info *);
86 int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
88 /* driver specifications */
89 const int capability; /* capability flags */
90 int n_minors; /* number of active minor devices */
91 /* handle uniform packets for scsi type devices (scsi,atapi) */
92 int (*generic_packet) (struct cdrom_device_info *,
93 struct packet_command *);
96 /* the general block_device operations structure: */
97 extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev,
99 extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode);
100 extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev,
101 fmode_t mode, unsigned int cmd, unsigned long arg);
102 extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
103 unsigned int clearing);
104 extern int cdrom_media_changed(struct cdrom_device_info *);
106 extern int register_cdrom(struct cdrom_device_info *cdi);
107 extern void unregister_cdrom(struct cdrom_device_info *cdi);
117 extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written);
118 extern int cdrom_number_of_slots(struct cdrom_device_info *cdi);
119 extern int cdrom_mode_select(struct cdrom_device_info *cdi,
120 struct packet_command *cgc);
121 extern int cdrom_mode_sense(struct cdrom_device_info *cdi,
122 struct packet_command *cgc,
123 int page_code, int page_control);
124 extern void init_cdrom_command(struct packet_command *cgc,
125 void *buffer, int len, int type);
127 /* The SCSI spec says there could be 256 slots. */
128 #define CDROM_MAX_SLOTS 256
130 struct cdrom_mechstat_header {
131 #if defined(__BIG_ENDIAN_BITFIELD)
133 __u8 changer_state : 2;
138 #elif defined(__LITTLE_ENDIAN_BITFIELD)
140 __u8 changer_state : 2;
152 #if defined(__BIG_ENDIAN_BITFIELD)
153 __u8 disc_present : 1;
156 #elif defined(__LITTLE_ENDIAN_BITFIELD)
159 __u8 disc_present : 1;
164 struct cdrom_changer_info {
165 struct cdrom_mechstat_header hdr;
166 struct cdrom_slot slots[CDROM_MAX_SLOTS];
173 mechtype_individual_changer = 4,
174 mechtype_cartridge_changer = 5
178 #if defined(__BIG_ENDIAN_BITFIELD)
188 __u8 multi_session : 2; /* or border, DVD */
193 __u8 data_block_type : 4;
194 #elif defined(__LITTLE_ENDIAN_BITFIELD)
207 __u8 multi_session : 2; /* or border, DVD */
208 __u8 data_block_type : 4;
213 #if defined(__BIG_ENDIAN_BITFIELD)
216 #elif defined(__LITTLE_ENDIAN_BITFIELD)
230 } __attribute__((packed)) write_param_page;
237 __u8 block_desc_length;
239 __u8 number_of_blocks_hi;
240 __u8 number_of_blocks_med;
241 __u8 number_of_blocks_lo;
243 __u8 block_length_hi;
244 __u8 block_length_med;
245 __u8 block_length_lo;
249 __u16 report_key_length;
252 #if defined(__BIG_ENDIAN_BITFIELD)
256 #elif defined(__LITTLE_ENDIAN_BITFIELD)
266 struct event_header {
268 #if defined(__BIG_ENDIAN_BITFIELD)
271 __u8 notification_class : 3;
272 #elif defined(__LITTLE_ENDIAN_BITFIELD)
273 __u8 notification_class : 3;
277 __u8 supp_event_class;
280 struct media_event_desc {
281 #if defined(__BIG_ENDIAN_BITFIELD)
283 __u8 media_event_code : 4;
285 __u8 media_present : 1;
287 #elif defined(__LITTLE_ENDIAN_BITFIELD)
288 __u8 media_event_code : 4;
291 __u8 media_present : 1;
298 extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
300 static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
302 lba += CD_MSF_OFFSET;
303 lba &= 0xffffff; /* negative lbas use only 24 bits */
304 *m = lba / (CD_SECS * CD_FRAMES);
305 lba %= (CD_SECS * CD_FRAMES);
306 *s = lba / CD_FRAMES;
307 *f = lba % CD_FRAMES;
310 static inline int msf_to_lba(u8 m, u8 s, u8 f)
312 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
314 #endif /* _LINUX_CDROM_H */