1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * -- <linux/cdrom.h> 4 * General header file for linux CD-ROM drivers 5 * Copyright (C) 1992 David Giller, rafetmad@oxy.edu 6 * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de 7 * 1996 David van Leeuwen, david@tm.tno.nl 8 * 1997, 1998 Erik Andersen, andersee@debian.org 9 * 1998-2002 Jens Axboe, axboe@suse.de 10 */ 11 #ifndef _LINUX_CDROM_H 12 #define _LINUX_CDROM_H 13 14 #include <linux/fs.h> /* not really needed, later.. */ 15 #include <linux/list.h> 16 #include <linux/blkdev.h> 17 #include <scsi/scsi_common.h> 18 #include <uapi/linux/cdrom.h> 19 20 struct packet_command 21 { 22 unsigned char cmd[CDROM_PACKET_SIZE]; 23 unsigned char *buffer; 24 unsigned int buflen; 25 int stat; 26 struct scsi_sense_hdr *sshdr; 27 unsigned char data_direction; 28 int quiet; 29 int timeout; 30 void *reserved[1]; 31 }; 32 33 /* 34 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA 35 */ 36 #define CDDA_OLD 0 /* old style */ 37 #define CDDA_BPC_SINGLE 1 /* single frame block pc */ 38 #define CDDA_BPC_FULL 2 /* multi frame block pc */ 39 40 /* Uniform cdrom data structures for cdrom.c */ 41 struct cdrom_device_info { 42 const struct cdrom_device_ops *ops; /* link to device_ops */ 43 struct list_head list; /* linked list of all device_info */ 44 struct gendisk *disk; /* matching block layer disk */ 45 void *handle; /* driver-dependent data */ 46 /* specifications */ 47 int mask; /* mask of capability: disables them */ 48 int speed; /* maximum speed for reading data */ 49 int capacity; /* number of discs in jukebox */ 50 /* device-related storage */ 51 unsigned int options : 30; /* options flags */ 52 unsigned mc_flags : 2; /* media change buffer flags */ 53 unsigned int vfs_events; /* cached events for vfs path */ 54 unsigned int ioctl_events; /* cached events for ioctl path */ 55 int use_count; /* number of times device opened */ 56 char name[20]; /* name of the device type */ 57 /* per-device flags */ 58 __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */ 59 __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */ 60 __u8 reserved : 5; /* not used yet */ 61 int cdda_method; /* see flags */ 62 __u8 last_sense; 63 __u8 media_written; /* dirty flag, DVD+RW bookkeeping */ 64 unsigned short mmc3_profile; /* current MMC3 profile */ 65 int (*exit)(struct cdrom_device_info *); 66 int mrw_mode_page; 67 bool opened_for_data; 68 __s64 last_media_change_ms; 69 }; 70 71 struct cdrom_device_ops { 72 /* routines */ 73 int (*open) (struct cdrom_device_info *, int); 74 void (*release) (struct cdrom_device_info *); 75 int (*drive_status) (struct cdrom_device_info *, int); 76 unsigned int (*check_events) (struct cdrom_device_info *cdi, 77 unsigned int clearing, int slot); 78 int (*tray_move) (struct cdrom_device_info *, int); 79 int (*lock_door) (struct cdrom_device_info *, int); 80 int (*select_speed) (struct cdrom_device_info *, unsigned long); 81 int (*get_last_session) (struct cdrom_device_info *, 82 struct cdrom_multisession *); 83 int (*get_mcn) (struct cdrom_device_info *, 84 struct cdrom_mcn *); 85 /* hard reset device */ 86 int (*reset) (struct cdrom_device_info *); 87 /* play stuff */ 88 int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *); 89 90 /* handle uniform packets for scsi type devices (scsi,atapi) */ 91 int (*generic_packet) (struct cdrom_device_info *, 92 struct packet_command *); 93 int (*read_cdda_bpc)(struct cdrom_device_info *cdi, void __user *ubuf, 94 u32 lba, u32 nframes, u8 *last_sense); 95 /* driver specifications */ 96 const int capability; /* capability flags */ 97 }; 98 99 int cdrom_multisession(struct cdrom_device_info *cdi, 100 struct cdrom_multisession *info); 101 int cdrom_read_tocentry(struct cdrom_device_info *cdi, 102 struct cdrom_tocentry *entry); 103 104 /* the general block_device operations structure: */ 105 int cdrom_open(struct cdrom_device_info *cdi, blk_mode_t mode); 106 void cdrom_release(struct cdrom_device_info *cdi); 107 int cdrom_ioctl(struct cdrom_device_info *cdi, struct block_device *bdev, 108 unsigned int cmd, unsigned long arg); 109 extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi, 110 unsigned int clearing); 111 112 extern int register_cdrom(struct gendisk *disk, struct cdrom_device_info *cdi); 113 extern void unregister_cdrom(struct cdrom_device_info *cdi); 114 115 typedef struct { 116 int data; 117 int audio; 118 int cdi; 119 int xa; 120 long error; 121 } tracktype; 122 123 extern int cdrom_get_last_written(struct cdrom_device_info *cdi, long *last_written); 124 extern int cdrom_number_of_slots(struct cdrom_device_info *cdi); 125 extern int cdrom_mode_select(struct cdrom_device_info *cdi, 126 struct packet_command *cgc); 127 extern int cdrom_mode_sense(struct cdrom_device_info *cdi, 128 struct packet_command *cgc, 129 int page_code, int page_control); 130 extern void init_cdrom_command(struct packet_command *cgc, 131 void *buffer, int len, int type); 132 extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi, 133 struct packet_command *cgc); 134 135 /* The SCSI spec says there could be 256 slots. */ 136 #define CDROM_MAX_SLOTS 256 137 138 struct cdrom_mechstat_header { 139 #if defined(__BIG_ENDIAN_BITFIELD) 140 __u8 fault : 1; 141 __u8 changer_state : 2; 142 __u8 curslot : 5; 143 __u8 mech_state : 3; 144 __u8 door_open : 1; 145 __u8 reserved1 : 4; 146 #elif defined(__LITTLE_ENDIAN_BITFIELD) 147 __u8 curslot : 5; 148 __u8 changer_state : 2; 149 __u8 fault : 1; 150 __u8 reserved1 : 4; 151 __u8 door_open : 1; 152 __u8 mech_state : 3; 153 #endif 154 __u8 curlba[3]; 155 __u8 nslots; 156 __u16 slot_tablelen; 157 }; 158 159 struct cdrom_slot { 160 #if defined(__BIG_ENDIAN_BITFIELD) 161 __u8 disc_present : 1; 162 __u8 reserved1 : 6; 163 __u8 change : 1; 164 #elif defined(__LITTLE_ENDIAN_BITFIELD) 165 __u8 change : 1; 166 __u8 reserved1 : 6; 167 __u8 disc_present : 1; 168 #endif 169 __u8 reserved2[3]; 170 }; 171 172 struct cdrom_changer_info { 173 struct cdrom_mechstat_header hdr; 174 struct cdrom_slot slots[CDROM_MAX_SLOTS]; 175 }; 176 177 typedef enum { 178 mechtype_caddy = 0, 179 mechtype_tray = 1, 180 mechtype_popup = 2, 181 mechtype_individual_changer = 4, 182 mechtype_cartridge_changer = 5 183 } mechtype_t; 184 185 typedef struct { 186 #if defined(__BIG_ENDIAN_BITFIELD) 187 __u8 ps : 1; 188 __u8 reserved1 : 1; 189 __u8 page_code : 6; 190 __u8 page_length; 191 __u8 reserved2 : 1; 192 __u8 bufe : 1; 193 __u8 ls_v : 1; 194 __u8 test_write : 1; 195 __u8 write_type : 4; 196 __u8 multi_session : 2; /* or border, DVD */ 197 __u8 fp : 1; 198 __u8 copy : 1; 199 __u8 track_mode : 4; 200 __u8 reserved3 : 4; 201 __u8 data_block_type : 4; 202 #elif defined(__LITTLE_ENDIAN_BITFIELD) 203 __u8 page_code : 6; 204 __u8 reserved1 : 1; 205 __u8 ps : 1; 206 __u8 page_length; 207 __u8 write_type : 4; 208 __u8 test_write : 1; 209 __u8 ls_v : 1; 210 __u8 bufe : 1; 211 __u8 reserved2 : 1; 212 __u8 track_mode : 4; 213 __u8 copy : 1; 214 __u8 fp : 1; 215 __u8 multi_session : 2; /* or border, DVD */ 216 __u8 data_block_type : 4; 217 __u8 reserved3 : 4; 218 #endif 219 __u8 link_size; 220 __u8 reserved4; 221 #if defined(__BIG_ENDIAN_BITFIELD) 222 __u8 reserved5 : 2; 223 __u8 app_code : 6; 224 #elif defined(__LITTLE_ENDIAN_BITFIELD) 225 __u8 app_code : 6; 226 __u8 reserved5 : 2; 227 #endif 228 __u8 session_format; 229 __u8 reserved6; 230 __be32 packet_size; 231 __u16 audio_pause; 232 __u8 mcn[16]; 233 __u8 isrc[16]; 234 __u8 subhdr0; 235 __u8 subhdr1; 236 __u8 subhdr2; 237 __u8 subhdr3; 238 } __attribute__((packed)) write_param_page; 239 240 struct modesel_head 241 { 242 __u8 reserved1; 243 __u8 medium; 244 __u8 reserved2; 245 __u8 block_desc_length; 246 __u8 density; 247 __u8 number_of_blocks_hi; 248 __u8 number_of_blocks_med; 249 __u8 number_of_blocks_lo; 250 __u8 reserved3; 251 __u8 block_length_hi; 252 __u8 block_length_med; 253 __u8 block_length_lo; 254 }; 255 256 typedef struct { 257 __u16 report_key_length; 258 __u8 reserved1; 259 __u8 reserved2; 260 #if defined(__BIG_ENDIAN_BITFIELD) 261 __u8 type_code : 2; 262 __u8 vra : 3; 263 __u8 ucca : 3; 264 #elif defined(__LITTLE_ENDIAN_BITFIELD) 265 __u8 ucca : 3; 266 __u8 vra : 3; 267 __u8 type_code : 2; 268 #endif 269 __u8 region_mask; 270 __u8 rpc_scheme; 271 __u8 reserved3; 272 } rpc_state_t; 273 274 struct event_header { 275 __be16 data_len; 276 #if defined(__BIG_ENDIAN_BITFIELD) 277 __u8 nea : 1; 278 __u8 reserved1 : 4; 279 __u8 notification_class : 3; 280 #elif defined(__LITTLE_ENDIAN_BITFIELD) 281 __u8 notification_class : 3; 282 __u8 reserved1 : 4; 283 __u8 nea : 1; 284 #endif 285 __u8 supp_event_class; 286 }; 287 288 struct media_event_desc { 289 #if defined(__BIG_ENDIAN_BITFIELD) 290 __u8 reserved1 : 4; 291 __u8 media_event_code : 4; 292 __u8 reserved2 : 6; 293 __u8 media_present : 1; 294 __u8 door_open : 1; 295 #elif defined(__LITTLE_ENDIAN_BITFIELD) 296 __u8 media_event_code : 4; 297 __u8 reserved1 : 4; 298 __u8 door_open : 1; 299 __u8 media_present : 1; 300 __u8 reserved2 : 6; 301 #endif 302 __u8 start_slot; 303 __u8 end_slot; 304 }; 305 306 extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med); 307 lba_to_msf(int lba,u8 * m,u8 * s,u8 * f)308 static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f) 309 { 310 lba += CD_MSF_OFFSET; 311 lba &= 0xffffff; /* negative lbas use only 24 bits */ 312 *m = lba / (CD_SECS * CD_FRAMES); 313 lba %= (CD_SECS * CD_FRAMES); 314 *s = lba / CD_FRAMES; 315 *f = lba % CD_FRAMES; 316 } 317 msf_to_lba(u8 m,u8 s,u8 f)318 static inline int msf_to_lba(u8 m, u8 s, u8 f) 319 { 320 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET; 321 } 322 #endif /* _LINUX_CDROM_H */ 323