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 *, int);
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