1/* 2 * -- <linux/cdrom.h> 3 * General header file for linux CD-ROM drivers 4 * Copyright (C) 1992 David Giller, rafetmad@oxy.edu 5 * 1994, 1995 Eberhard M��nkeberg, 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 9 */ 10#ifndef _LINUX_CDROM_H 11#define _LINUX_CDROM_H 12 13#include <linux/fs.h> /* not really needed, later.. */ 14#include <linux/list.h> 15#include <uapi/linux/cdrom.h> 16 17struct packet_command 18{ 19 unsigned char cmd[CDROM_PACKET_SIZE]; 20 unsigned char *buffer; 21 unsigned int buflen; 22 int stat; 23 struct request_sense *sense; 24 unsigned char data_direction; 25 int quiet; 26 int timeout; 27 void *reserved[1]; 28}; 29 30/* 31 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA 32 */ 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 */ 36 37/* Uniform cdrom data structures for cdrom.c */ 38struct 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 */ 43/* specifications */ 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 */ 59 __u8 last_sense; 60 __u8 media_written; /* dirty flag, DVD+RW bookkeeping */ 61 unsigned short mmc3_profile; /* current MMC3 profile */ 62 int for_data; 63 int (*exit)(struct cdrom_device_info *); 64 int mrw_mode_page; 65}; 66 67struct cdrom_device_ops { 68/* routines */ 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 *, 82 struct cdrom_mcn *); 83 /* hard reset device */ 84 int (*reset) (struct cdrom_device_info *); 85 /* play stuff */ 86 int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *); 87 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 *); 94}; 95 96/* the general block_device operations structure: */ 97extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, 98 fmode_t mode); 99extern void cdrom_release(struct cdrom_device_info *cdi, fmode_t mode); 100extern int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 101 fmode_t mode, unsigned int cmd, unsigned long arg); 102extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 103 unsigned int clearing); 104extern int cdrom_media_changed(struct cdrom_device_info *); 105 106extern int register_cdrom(struct cdrom_device_info *cdi); 107extern void unregister_cdrom(struct cdrom_device_info *cdi); 108 109typedef struct { 110 int data; 111 int audio; 112 int cdi; 113 int xa; 114 long error; 115} tracktype; 116 117extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written); 118extern int cdrom_number_of_slots(struct cdrom_device_info *cdi); 119extern int cdrom_mode_select(struct cdrom_device_info *cdi, 120 struct packet_command *cgc); 121extern int cdrom_mode_sense(struct cdrom_device_info *cdi, 122 struct packet_command *cgc, 123 int page_code, int page_control); 124extern void init_cdrom_command(struct packet_command *cgc, 125 void *buffer, int len, int type); 126 127/* The SCSI spec says there could be 256 slots. */ 128#define CDROM_MAX_SLOTS 256 129 130struct cdrom_mechstat_header { 131#if defined(__BIG_ENDIAN_BITFIELD) 132 __u8 fault : 1; 133 __u8 changer_state : 2; 134 __u8 curslot : 5; 135 __u8 mech_state : 3; 136 __u8 door_open : 1; 137 __u8 reserved1 : 4; 138#elif defined(__LITTLE_ENDIAN_BITFIELD) 139 __u8 curslot : 5; 140 __u8 changer_state : 2; 141 __u8 fault : 1; 142 __u8 reserved1 : 4; 143 __u8 door_open : 1; 144 __u8 mech_state : 3; 145#endif 146 __u8 curlba[3]; 147 __u8 nslots; 148 __u16 slot_tablelen; 149}; 150 151struct cdrom_slot { 152#if defined(__BIG_ENDIAN_BITFIELD) 153 __u8 disc_present : 1; 154 __u8 reserved1 : 6; 155 __u8 change : 1; 156#elif defined(__LITTLE_ENDIAN_BITFIELD) 157 __u8 change : 1; 158 __u8 reserved1 : 6; 159 __u8 disc_present : 1; 160#endif 161 __u8 reserved2[3]; 162}; 163 164struct cdrom_changer_info { 165 struct cdrom_mechstat_header hdr; 166 struct cdrom_slot slots[CDROM_MAX_SLOTS]; 167}; 168 169typedef enum { 170 mechtype_caddy = 0, 171 mechtype_tray = 1, 172 mechtype_popup = 2, 173 mechtype_individual_changer = 4, 174 mechtype_cartridge_changer = 5 175} mechtype_t; 176 177typedef struct { 178#if defined(__BIG_ENDIAN_BITFIELD) 179 __u8 ps : 1; 180 __u8 reserved1 : 1; 181 __u8 page_code : 6; 182 __u8 page_length; 183 __u8 reserved2 : 1; 184 __u8 bufe : 1; 185 __u8 ls_v : 1; 186 __u8 test_write : 1; 187 __u8 write_type : 4; 188 __u8 multi_session : 2; /* or border, DVD */ 189 __u8 fp : 1; 190 __u8 copy : 1; 191 __u8 track_mode : 4; 192 __u8 reserved3 : 4; 193 __u8 data_block_type : 4; 194#elif defined(__LITTLE_ENDIAN_BITFIELD) 195 __u8 page_code : 6; 196 __u8 reserved1 : 1; 197 __u8 ps : 1; 198 __u8 page_length; 199 __u8 write_type : 4; 200 __u8 test_write : 1; 201 __u8 ls_v : 1; 202 __u8 bufe : 1; 203 __u8 reserved2 : 1; 204 __u8 track_mode : 4; 205 __u8 copy : 1; 206 __u8 fp : 1; 207 __u8 multi_session : 2; /* or border, DVD */ 208 __u8 data_block_type : 4; 209 __u8 reserved3 : 4; 210#endif 211 __u8 link_size; 212 __u8 reserved4; 213#if defined(__BIG_ENDIAN_BITFIELD) 214 __u8 reserved5 : 2; 215 __u8 app_code : 6; 216#elif defined(__LITTLE_ENDIAN_BITFIELD) 217 __u8 app_code : 6; 218 __u8 reserved5 : 2; 219#endif 220 __u8 session_format; 221 __u8 reserved6; 222 __be32 packet_size; 223 __u16 audio_pause; 224 __u8 mcn[16]; 225 __u8 isrc[16]; 226 __u8 subhdr0; 227 __u8 subhdr1; 228 __u8 subhdr2; 229 __u8 subhdr3; 230} __attribute__((packed)) write_param_page; 231 232struct modesel_head 233{ 234 __u8 reserved1; 235 __u8 medium; 236 __u8 reserved2; 237 __u8 block_desc_length; 238 __u8 density; 239 __u8 number_of_blocks_hi; 240 __u8 number_of_blocks_med; 241 __u8 number_of_blocks_lo; 242 __u8 reserved3; 243 __u8 block_length_hi; 244 __u8 block_length_med; 245 __u8 block_length_lo; 246}; 247 248typedef struct { 249 __u16 report_key_length; 250 __u8 reserved1; 251 __u8 reserved2; 252#if defined(__BIG_ENDIAN_BITFIELD) 253 __u8 type_code : 2; 254 __u8 vra : 3; 255 __u8 ucca : 3; 256#elif defined(__LITTLE_ENDIAN_BITFIELD) 257 __u8 ucca : 3; 258 __u8 vra : 3; 259 __u8 type_code : 2; 260#endif 261 __u8 region_mask; 262 __u8 rpc_scheme; 263 __u8 reserved3; 264} rpc_state_t; 265 266struct event_header { 267 __be16 data_len; 268#if defined(__BIG_ENDIAN_BITFIELD) 269 __u8 nea : 1; 270 __u8 reserved1 : 4; 271 __u8 notification_class : 3; 272#elif defined(__LITTLE_ENDIAN_BITFIELD) 273 __u8 notification_class : 3; 274 __u8 reserved1 : 4; 275 __u8 nea : 1; 276#endif 277 __u8 supp_event_class; 278}; 279 280struct media_event_desc { 281#if defined(__BIG_ENDIAN_BITFIELD) 282 __u8 reserved1 : 4; 283 __u8 media_event_code : 4; 284 __u8 reserved2 : 6; 285 __u8 media_present : 1; 286 __u8 door_open : 1; 287#elif defined(__LITTLE_ENDIAN_BITFIELD) 288 __u8 media_event_code : 4; 289 __u8 reserved1 : 4; 290 __u8 door_open : 1; 291 __u8 media_present : 1; 292 __u8 reserved2 : 6; 293#endif 294 __u8 start_slot; 295 __u8 end_slot; 296}; 297 298extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med); 299 300static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f) 301{ 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; 308} 309 310static inline int msf_to_lba(u8 m, u8 s, u8 f) 311{ 312 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; 313} 314#endif /* _LINUX_CDROM_H */ 315