| xj | b04a402 | 2021-11-25 15:01:52 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | /* |
| 3 | * sr.h by David Giller |
| 4 | * CD-ROM disk driver header file |
| 5 | * |
| 6 | * adapted from: |
| 7 | * sd.h Copyright (C) 1992 Drew Eckhardt |
| 8 | * SCSI disk driver header file by |
| 9 | * Drew Eckhardt |
| 10 | * |
| 11 | * <drew@colorado.edu> |
| 12 | * |
| 13 | * Modified by Eric Youngdale eric@andante.org to |
| 14 | * add scatter-gather, multiple outstanding request, and other |
| 15 | * enhancements. |
| 16 | */ |
| 17 | |
| 18 | #ifndef _SR_H |
| 19 | #define _SR_H |
| 20 | |
| 21 | #include <linux/genhd.h> |
| 22 | #include <linux/kref.h> |
| 23 | |
| 24 | #define MAX_RETRIES 3 |
| 25 | #define SR_TIMEOUT (30 * HZ) |
| 26 | |
| 27 | struct scsi_device; |
| 28 | |
| 29 | /* The CDROM is fairly slow, so we need a little extra time */ |
| 30 | /* In fact, it is very slow if it has to spin up first */ |
| 31 | #define IOCTL_TIMEOUT 30*HZ |
| 32 | |
| 33 | |
| 34 | typedef struct scsi_cd { |
| 35 | struct scsi_driver *driver; |
| 36 | unsigned capacity; /* size in blocks */ |
| 37 | struct scsi_device *device; |
| 38 | unsigned int vendor; /* vendor code, see sr_vendor.c */ |
| 39 | unsigned long ms_offset; /* for reading multisession-CD's */ |
| 40 | unsigned writeable : 1; |
| 41 | unsigned use:1; /* is this device still supportable */ |
| 42 | unsigned xa_flag:1; /* CD has XA sectors ? */ |
| 43 | unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */ |
| 44 | unsigned readcd_cdda:1; /* reading audio data using READ_CD */ |
| 45 | unsigned media_present:1; /* media is present */ |
| 46 | |
| 47 | /* GET_EVENT spurious event handling, blk layer guarantees exclusion */ |
| 48 | int tur_mismatch; /* nr of get_event TUR mismatches */ |
| 49 | bool tur_changed:1; /* changed according to TUR */ |
| 50 | bool get_event_changed:1; /* changed according to GET_EVENT */ |
| 51 | bool ignore_get_event:1; /* GET_EVENT is unreliable, use TUR */ |
| 52 | |
| 53 | struct cdrom_device_info cdi; |
| 54 | /* We hold gendisk and scsi_device references on probe and use |
| 55 | * the refs on this kref to decide when to release them */ |
| 56 | struct kref kref; |
| 57 | struct gendisk *disk; |
| 58 | } Scsi_CD; |
| 59 | |
| 60 | #define sr_printk(prefix, cd, fmt, a...) \ |
| 61 | sdev_prefix_printk(prefix, (cd)->device, (cd)->cdi.name, fmt, ##a) |
| 62 | |
| 63 | int sr_do_ioctl(Scsi_CD *, struct packet_command *); |
| 64 | |
| 65 | int sr_lock_door(struct cdrom_device_info *, int); |
| 66 | int sr_tray_move(struct cdrom_device_info *, int); |
| 67 | int sr_drive_status(struct cdrom_device_info *, int); |
| 68 | int sr_disk_status(struct cdrom_device_info *); |
| 69 | int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *); |
| 70 | int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *); |
| 71 | int sr_reset(struct cdrom_device_info *); |
| 72 | int sr_select_speed(struct cdrom_device_info *cdi, int speed); |
| 73 | int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *); |
| 74 | |
| 75 | int sr_is_xa(Scsi_CD *); |
| 76 | |
| 77 | /* sr_vendor.c */ |
| 78 | void sr_vendor_init(Scsi_CD *); |
| 79 | int sr_cd_check(struct cdrom_device_info *); |
| 80 | int sr_set_blocklength(Scsi_CD *, int blocklength); |
| 81 | |
| 82 | #endif |