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#include <linux/mutex.h> 24 25#define MAX_RETRIES 3 26#define SR_TIMEOUT (30 * HZ) 27 28struct scsi_device; 29 30/* The CDROM is fairly slow, so we need a little extra time */ 31/* In fact, it is very slow if it has to spin up first */ 32#define IOCTL_TIMEOUT 30*HZ 33 34 35typedef struct scsi_cd { 36 struct scsi_driver *driver; 37 unsigned capacity; /* size in blocks */ 38 struct scsi_device *device; 39 unsigned int vendor; /* vendor code, see sr_vendor.c */ 40 unsigned long ms_offset; /* for reading multisession-CD's */ 41 unsigned writeable : 1; 42 unsigned use:1; /* is this device still supportable */ 43 unsigned xa_flag:1; /* CD has XA sectors ? */ 44 unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */ 45 unsigned readcd_cdda:1; /* reading audio data using READ_CD */ 46 unsigned media_present:1; /* media is present */ 47 48 /* GET_EVENT spurious event handling, blk layer guarantees exclusion */ 49 int tur_mismatch; /* nr of get_event TUR mismatches */ 50 bool tur_changed:1; /* changed according to TUR */ 51 bool get_event_changed:1; /* changed according to GET_EVENT */ 52 bool ignore_get_event:1; /* GET_EVENT is unreliable, use TUR */ 53 54 struct cdrom_device_info cdi; 55 struct mutex lock; 56 /* We hold gendisk and scsi_device references on probe and use 57 * the refs on this kref to decide when to release them */ 58 struct kref kref; 59 struct gendisk *disk; 60} Scsi_CD; 61 62#define sr_printk(prefix, cd, fmt, a...) \ 63 sdev_prefix_printk(prefix, (cd)->device, (cd)->cdi.name, fmt, ##a) 64 65int sr_do_ioctl(Scsi_CD *, struct packet_command *); 66 67int sr_lock_door(struct cdrom_device_info *, int); 68int sr_tray_move(struct cdrom_device_info *, int); 69int sr_drive_status(struct cdrom_device_info *, int); 70int sr_disk_status(struct cdrom_device_info *); 71int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *); 72int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *); 73int sr_reset(struct cdrom_device_info *); 74int sr_select_speed(struct cdrom_device_info *cdi, int speed); 75int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *); 76 77int sr_is_xa(Scsi_CD *); 78 79/* sr_vendor.c */ 80void sr_vendor_init(Scsi_CD *); 81int sr_cd_check(struct cdrom_device_info *); 82int sr_set_blocklength(Scsi_CD *, int blocklength); 83 84#endif 85