ide-cd.h revision 972560fb9d9ea7bc7082c0c79c99c24e3f56606c 
1/*
2 *  linux/drivers/ide/ide_cd.h
3 *
4 *  Copyright (C) 1996-98  Erik Andersen
5 *  Copyright (C) 1998-2000 Jens Axboe
6 */
7#ifndef _IDE_CD_H
8#define _IDE_CD_H
9
10#include <linux/cdrom.h>
11#include <asm/byteorder.h>
12
13/*
14 * typical timeout for packet command
15 */
16#define ATAPI_WAIT_PC		(60 * HZ)
17#define ATAPI_WAIT_WRITE_BUSY	(10 * HZ)
18
19/************************************************************************/
20
21#define SECTOR_BITS 		9
22#ifndef SECTOR_SIZE
23#define SECTOR_SIZE		(1 << SECTOR_BITS)
24#endif
25#define SECTORS_PER_FRAME	(CD_FRAMESIZE >> SECTOR_BITS)
26#define SECTOR_BUFFER_SIZE	(CD_FRAMESIZE * 32)
27
28/* Capabilities Page size including 8 bytes of Mode Page Header */
29#define ATAPI_CAPABILITIES_PAGE_SIZE		(8 + 20)
30#define ATAPI_CAPABILITIES_PAGE_PAD_SIZE	4
31
32enum {
33	/* Device sends an interrupt when ready for a packet command. */
34	IDE_CD_FLAG_DRQ_INTERRUPT	= (1 << 0),
35	/* Drive cannot lock the door. */
36	IDE_CD_FLAG_NO_DOORLOCK		= (1 << 1),
37	/* Drive cannot eject the disc. */
38	IDE_CD_FLAG_NO_EJECT		= (1 << 2),
39	/* Drive is a pre ATAPI 1.2 drive. */
40	IDE_CD_FLAG_PRE_ATAPI12		= (1 << 3),
41	/* TOC addresses are in BCD. */
42	IDE_CD_FLAG_TOCADDR_AS_BCD	= (1 << 4),
43	/* TOC track numbers are in BCD. */
44	IDE_CD_FLAG_TOCTRACKS_AS_BCD	= (1 << 5),
45	/*
46	 * Drive does not provide data in multiples of SECTOR_SIZE
47	 * when more than one interrupt is needed.
48	 */
49	IDE_CD_FLAG_LIMIT_NFRAMES	= (1 << 6),
50	/* Seeking in progress. */
51	IDE_CD_FLAG_SEEKING		= (1 << 7),
52	/* Driver has noticed a media change. */
53	IDE_CD_FLAG_MEDIA_CHANGED	= (1 << 8),
54	/* Saved TOC information is current. */
55	IDE_CD_FLAG_TOC_VALID		= (1 << 9),
56	/* We think that the drive door is locked. */
57	IDE_CD_FLAG_DOOR_LOCKED		= (1 << 10),
58	/* SET_CD_SPEED command is unsupported. */
59	IDE_CD_FLAG_NO_SPEED_SELECT	= (1 << 11),
60	IDE_CD_FLAG_VERTOS_300_SSD	= (1 << 12),
61	IDE_CD_FLAG_VERTOS_600_ESD	= (1 << 13),
62	IDE_CD_FLAG_SANYO_3CD		= (1 << 14),
63	IDE_CD_FLAG_FULL_CAPS_PAGE	= (1 << 15),
64	IDE_CD_FLAG_PLAY_AUDIO_OK	= (1 << 16),
65	IDE_CD_FLAG_LE_SPEED_FIELDS	= (1 << 17),
66};
67
68/* Structure of a MSF cdrom address. */
69struct atapi_msf {
70	byte reserved;
71	byte minute;
72	byte second;
73	byte frame;
74};
75
76/* Space to hold the disk TOC. */
77#define MAX_TRACKS 99
78struct atapi_toc_header {
79	unsigned short toc_length;
80	byte first_track;
81	byte last_track;
82};
83
84struct atapi_toc_entry {
85	byte reserved1;
86#if defined(__BIG_ENDIAN_BITFIELD)
87	__u8 adr     : 4;
88	__u8 control : 4;
89#elif defined(__LITTLE_ENDIAN_BITFIELD)
90	__u8 control : 4;
91	__u8 adr     : 4;
92#else
93#error "Please fix <asm/byteorder.h>"
94#endif
95	byte track;
96	byte reserved2;
97	union {
98		unsigned lba;
99		struct atapi_msf msf;
100	} addr;
101};
102
103struct atapi_toc {
104	int    last_session_lba;
105	int    xa_flag;
106	unsigned long capacity;
107	struct atapi_toc_header hdr;
108	struct atapi_toc_entry  ent[MAX_TRACKS+1];
109	  /* One extra for the leadout. */
110};
111
112/* Extra per-device info for cdrom drives. */
113struct cdrom_info {
114	ide_drive_t	*drive;
115	ide_driver_t	*driver;
116	struct gendisk	*disk;
117	struct kref	kref;
118
119	/* Buffer for table of contents.  NULL if we haven't allocated
120	   a TOC buffer for this device yet. */
121
122	struct atapi_toc *toc;
123
124	unsigned long	sector_buffered;
125	unsigned long	nsectors_buffered;
126	unsigned char	*buffer;
127
128	/* The result of the last successful request sense command
129	   on this device. */
130	struct request_sense sense_data;
131
132	struct request request_sense_request;
133	int dma;
134	unsigned long last_block;
135	unsigned long start_seek;
136
137	unsigned int cd_flags;
138
139	u8 max_speed;		/* Max speed of the drive. */
140	u8 current_speed;	/* Current speed of the drive. */
141
142        /* Per-device info needed by cdrom.c generic driver. */
143        struct cdrom_device_info devinfo;
144
145	unsigned long write_timeout;
146};
147
148/* ide-cd_verbose.c */
149void ide_cd_log_error(const char *, struct request *, struct request_sense *);
150
151#endif /* _IDE_CD_H */
152