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 83