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ACPI: fix acpi_find_child_device() invocation in acpi_preset_companion()
[mirror_ubuntu-bionic-kernel.git] / include / linux / cdrom.h
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b2441318 1/* SPDX-License-Identifier: GPL-2.0 */
1da177e4
LT		 2/*
3 * -- <linux/cdrom.h>
4 * General header file for linux CD-ROM drivers
5 * Copyright (C) 1992 David Giller, rafetmad@oxy.edu
96de0e25 6 * 1994, 1995 Eberhard Mönkeberg, emoenke@gwdg.de
1da177e4
LT		 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 */
1da177e4
LT		 11#ifndef _LINUX_CDROM_H
12#define _LINUX_CDROM_H
13
1da177e4 14#include <linux/fs.h> /* not really needed, later.. */
7fd097d4 15#include <linux/list.h>
607ca46e 16#include <uapi/linux/cdrom.h>
1da177e4
LT		 17
18struct packet_command
19{
20 unsigned char cmd[CDROM_PACKET_SIZE];
21 unsigned char *buffer;
22 unsigned int buflen;
23 int stat;
24 struct request_sense *sense;
25 unsigned char data_direction;
26 int quiet;
27 int timeout;
28 void *reserved[1];
29};
30
31/*
32 * _OLD will use PIO transfer on atapi devices, _BPC_* will use DMA
33 */
34#define CDDA_OLD 0 /* old style */
35#define CDDA_BPC_SINGLE 1 /* single frame block pc */
36#define CDDA_BPC_FULL 2 /* multi frame block pc */
37
38/* Uniform cdrom data structures for cdrom.c */
39struct cdrom_device_info {
853fe1bf 40 const struct cdrom_device_ops *ops; /* link to device_ops */
7fd097d4 41 struct list_head list; /* linked list of all device_info */
1da177e4
LT		 42 struct gendisk *disk; /* matching block layer disk */
43 void *handle; /* driver-dependent data */
44/* specifications */
45 int mask; /* mask of capability: disables them */
46 int speed; /* maximum speed for reading data */
47 int capacity; /* number of discs in jukebox */
48/* device-related storage */
0cba01db 49 unsigned int options : 30; /* options flags */
1da177e4 50 unsigned mc_flags : 2; /* media change buffer flags */
2d921729
TH		 51 unsigned int vfs_events; /* cached events for vfs path */
52 unsigned int ioctl_events; /* cached events for ioctl path */
1da177e4
LT		 53 int use_count; /* number of times device opened */
54 char name[20]; /* name of the device type */
55/* per-device flags */
56 __u8 sanyo_slot : 2; /* Sanyo 3 CD changer support */
cdccaa94
PB		 57 __u8 keeplocked : 1; /* CDROM_LOCKDOOR status */
58 __u8 reserved : 5; /* not used yet */
1da177e4
LT		 59 int cdda_method; /* see flags */
60 __u8 last_sense;
61 __u8 media_written; /* dirty flag, DVD+RW bookkeeping */
62 unsigned short mmc3_profile; /* current MMC3 profile */
63 int for_data;
64 int (*exit)(struct cdrom_device_info *);
65 int mrw_mode_page;
66};
67
68struct cdrom_device_ops {
69/* routines */
70 int (*open) (struct cdrom_device_info *, int);
71 void (*release) (struct cdrom_device_info *);
72 int (*drive_status) (struct cdrom_device_info *, int);
2d921729
TH		 73 unsigned int (*check_events) (struct cdrom_device_info *cdi,
74 unsigned int clearing, int slot);
1da177e4
LT		 75 int (*media_changed) (struct cdrom_device_info *, int);
76 int (*tray_move) (struct cdrom_device_info *, int);
77 int (*lock_door) (struct cdrom_device_info *, int);
78 int (*select_speed) (struct cdrom_device_info *, int);
79 int (*select_disc) (struct cdrom_device_info *, int);
80 int (*get_last_session) (struct cdrom_device_info *,
81 struct cdrom_multisession *);
82 int (*get_mcn) (struct cdrom_device_info *,
83 struct cdrom_mcn *);
84 /* hard reset device */
85 int (*reset) (struct cdrom_device_info *);
86 /* play stuff */
87 int (*audio_ioctl) (struct cdrom_device_info *,unsigned int, void *);
6a2900b6 88
1da177e4
LT		 89/* driver specifications */
90 const int capability; /* capability flags */
1da177e4
LT		 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: */
bbc1cc97
AV		 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);
2d921729
TH		 102extern unsigned int cdrom_check_events(struct cdrom_device_info *cdi,
103 unsigned int clearing);
1da177e4
LT		 104extern int cdrom_media_changed(struct cdrom_device_info *);
105
106extern int register_cdrom(struct cdrom_device_info *cdi);
0a0c4114 107extern void unregister_cdrom(struct cdrom_device_info *cdi);
1da177e4
LT		 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);
853fe1bf
KC		 126extern int cdrom_dummy_generic_packet(struct cdrom_device_info *cdi,
127 struct packet_command *cgc);
1da177e4
LT		 128
129/* The SCSI spec says there could be 256 slots. */
130#define CDROM_MAX_SLOTS 256
131
132struct cdrom_mechstat_header {
133#if defined(__BIG_ENDIAN_BITFIELD)
134 __u8 fault : 1;
135 __u8 changer_state : 2;
136 __u8 curslot : 5;
137 __u8 mech_state : 3;
138 __u8 door_open : 1;
139 __u8 reserved1 : 4;
140#elif defined(__LITTLE_ENDIAN_BITFIELD)
141 __u8 curslot : 5;
142 __u8 changer_state : 2;
143 __u8 fault : 1;
144 __u8 reserved1 : 4;
145 __u8 door_open : 1;
146 __u8 mech_state : 3;
147#endif
148 __u8 curlba[3];
149 __u8 nslots;
150 __u16 slot_tablelen;
151};
152
153struct cdrom_slot {
154#if defined(__BIG_ENDIAN_BITFIELD)
155 __u8 disc_present : 1;
156 __u8 reserved1 : 6;
157 __u8 change : 1;
158#elif defined(__LITTLE_ENDIAN_BITFIELD)
159 __u8 change : 1;
160 __u8 reserved1 : 6;
161 __u8 disc_present : 1;
162#endif
163 __u8 reserved2[3];
164};
165
166struct cdrom_changer_info {
167 struct cdrom_mechstat_header hdr;
168 struct cdrom_slot slots[CDROM_MAX_SLOTS];
169};
170
171typedef enum {
172 mechtype_caddy = 0,
173 mechtype_tray = 1,
174 mechtype_popup = 2,
175 mechtype_individual_changer = 4,
176 mechtype_cartridge_changer = 5
177} mechtype_t;
178
179typedef struct {
180#if defined(__BIG_ENDIAN_BITFIELD)
181 __u8 ps : 1;
182 __u8 reserved1 : 1;
183 __u8 page_code : 6;
184 __u8 page_length;
185 __u8 reserved2 : 1;
186 __u8 bufe : 1;
187 __u8 ls_v : 1;
188 __u8 test_write : 1;
189 __u8 write_type : 4;
190 __u8 multi_session : 2; /* or border, DVD */
191 __u8 fp : 1;
192 __u8 copy : 1;
193 __u8 track_mode : 4;
194 __u8 reserved3 : 4;
195 __u8 data_block_type : 4;
196#elif defined(__LITTLE_ENDIAN_BITFIELD)
197 __u8 page_code : 6;
198 __u8 reserved1 : 1;
199 __u8 ps : 1;
200 __u8 page_length;
201 __u8 write_type : 4;
202 __u8 test_write : 1;
203 __u8 ls_v : 1;
204 __u8 bufe : 1;
205 __u8 reserved2 : 1;
206 __u8 track_mode : 4;
207 __u8 copy : 1;
208 __u8 fp : 1;
209 __u8 multi_session : 2; /* or border, DVD */
210 __u8 data_block_type : 4;
211 __u8 reserved3 : 4;
212#endif
213 __u8 link_size;
214 __u8 reserved4;
215#if defined(__BIG_ENDIAN_BITFIELD)
216 __u8 reserved5 : 2;
217 __u8 app_code : 6;
218#elif defined(__LITTLE_ENDIAN_BITFIELD)
219 __u8 app_code : 6;
220 __u8 reserved5 : 2;
221#endif
222 __u8 session_format;
223 __u8 reserved6;
56052d52 224 __be32 packet_size;
1da177e4
LT		 225 __u16 audio_pause;
226 __u8 mcn[16];
227 __u8 isrc[16];
228 __u8 subhdr0;
229 __u8 subhdr1;
230 __u8 subhdr2;
231 __u8 subhdr3;
232} __attribute__((packed)) write_param_page;
233
234struct modesel_head
235{
236 __u8 reserved1;
237 __u8 medium;
238 __u8 reserved2;
239 __u8 block_desc_length;
240 __u8 density;
241 __u8 number_of_blocks_hi;
242 __u8 number_of_blocks_med;
243 __u8 number_of_blocks_lo;
244 __u8 reserved3;
245 __u8 block_length_hi;
246 __u8 block_length_med;
247 __u8 block_length_lo;
248};
249
250typedef struct {
251 __u16 report_key_length;
252 __u8 reserved1;
253 __u8 reserved2;
254#if defined(__BIG_ENDIAN_BITFIELD)
255 __u8 type_code : 2;
256 __u8 vra : 3;
257 __u8 ucca : 3;
258#elif defined(__LITTLE_ENDIAN_BITFIELD)
259 __u8 ucca : 3;
260 __u8 vra : 3;
261 __u8 type_code : 2;
262#endif
263 __u8 region_mask;
264 __u8 rpc_scheme;
265 __u8 reserved3;
266} rpc_state_t;
267
268struct event_header {
56052d52 269 __be16 data_len;
1da177e4
LT		 270#if defined(__BIG_ENDIAN_BITFIELD)
271 __u8 nea : 1;
272 __u8 reserved1 : 4;
273 __u8 notification_class : 3;
274#elif defined(__LITTLE_ENDIAN_BITFIELD)
275 __u8 notification_class : 3;
276 __u8 reserved1 : 4;
277 __u8 nea : 1;
278#endif
279 __u8 supp_event_class;
280};
281
282struct media_event_desc {
283#if defined(__BIG_ENDIAN_BITFIELD)
284 __u8 reserved1 : 4;
285 __u8 media_event_code : 4;
286 __u8 reserved2 : 6;
287 __u8 media_present : 1;
288 __u8 door_open : 1;
289#elif defined(__LITTLE_ENDIAN_BITFIELD)
290 __u8 media_event_code : 4;
291 __u8 reserved1 : 4;
292 __u8 door_open : 1;
293 __u8 media_present : 1;
294 __u8 reserved2 : 6;
295#endif
296 __u8 start_slot;
297 __u8 end_slot;
298};
299
300extern int cdrom_get_media_event(struct cdrom_device_info *cdi, struct media_event_desc *med);
301
a1bb9457
BZ		 302static inline void lba_to_msf(int lba, u8 *m, u8 *s, u8 *f)
303{
304 lba += CD_MSF_OFFSET;
305 lba &= 0xffffff; /* negative lbas use only 24 bits */
306 *m = lba / (CD_SECS * CD_FRAMES);
307 lba %= (CD_SECS * CD_FRAMES);
308 *s = lba / CD_FRAMES;
309 *f = lba % CD_FRAMES;
310}
311
312static inline int msf_to_lba(u8 m, u8 s, u8 f)
313{
314 return (((m * CD_SECS) + s) * CD_FRAMES + f) - CD_MSF_OFFSET;
315}
1da177e4 316#endif /* _LINUX_CDROM_H */
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