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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 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 |
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 | |
17 | struct 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 */ |
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 */ |
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 | |
67 | struct 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: */ |
97 | extern int cdrom_open(struct cdrom_device_info *cdi, struct block_device *bdev, |
98 | fmode_t mode); |
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 *); |
105 | |
106 | extern int register_cdrom(struct cdrom_device_info *cdi); |
107 | extern void unregister_cdrom(struct cdrom_device_info *cdi); |
108 | |
109 | typedef struct { |
110 | int data; |
111 | int audio; |
112 | int cdi; |
113 | int xa; |
114 | long error; |
115 | } tracktype; |
116 | |
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); |
126 | |
127 | /* The SCSI spec says there could be 256 slots. */ |
128 | #define CDROM_MAX_SLOTS 256 |
129 | |
130 | struct 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 | |
151 | struct 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 | |
164 | struct cdrom_changer_info { |
165 | struct cdrom_mechstat_header hdr; |
166 | struct cdrom_slot slots[CDROM_MAX_SLOTS]; |
167 | }; |
168 | |
169 | typedef 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 | |
177 | typedef 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 | |
232 | struct 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 | |
248 | typedef 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 | |
266 | struct 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 | |
280 | struct 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 | |
298 | extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med); |
299 | |
300 | static 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 | |
310 | static 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 |
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