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/mutex.h> 22 23 #define MAX_RETRIES 3 24 #define SR_TIMEOUT (30 * HZ) 25 26 struct scsi_device; 27 28 /* The CDROM is fairly slow, so we need a little extra time */ 29 /* In fact, it is very slow if it has to spin up first */ 30 #define IOCTL_TIMEOUT 30*HZ 31 32 33 typedef struct scsi_cd { 34 unsigned capacity; /* size in blocks */ 35 struct scsi_device *device; 36 unsigned int vendor; /* vendor code, see sr_vendor.c */ 37 unsigned long ms_offset; /* for reading multisession-CD's */ 38 unsigned writeable : 1; 39 unsigned use:1; /* is this device still supportable */ 40 unsigned xa_flag:1; /* CD has XA sectors ? */ 41 unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */ 42 unsigned readcd_cdda:1; /* reading audio data using READ_CD */ 43 unsigned media_present:1; /* media is present */ 44 45 /* GET_EVENT spurious event handling, blk layer guarantees exclusion */ 46 int tur_mismatch; /* nr of get_event TUR mismatches */ 47 bool tur_changed:1; /* changed according to TUR */ 48 bool get_event_changed:1; /* changed according to GET_EVENT */ 49 bool ignore_get_event:1; /* GET_EVENT is unreliable, use TUR */ 50 51 struct cdrom_device_info cdi; 52 struct mutex lock; 53 struct gendisk *disk; 54 } Scsi_CD; 55 56 #define sr_printk(prefix, cd, fmt, a...) \ 57 sdev_prefix_printk(prefix, (cd)->device, (cd)->cdi.name, fmt, ##a) 58 59 int sr_do_ioctl(Scsi_CD *, struct packet_command *); 60 61 int sr_lock_door(struct cdrom_device_info *, int); 62 int sr_tray_move(struct cdrom_device_info *, int); 63 int sr_drive_status(struct cdrom_device_info *, int); 64 int sr_disk_status(struct cdrom_device_info *); 65 int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *); 66 int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *); 67 int sr_reset(struct cdrom_device_info *); 68 int sr_select_speed(struct cdrom_device_info *cdi, int speed); 69 int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *); 70 71 int sr_is_xa(Scsi_CD *); 72 73 /* sr_vendor.c */ 74 void sr_vendor_init(Scsi_CD *); 75 int sr_cd_check(struct cdrom_device_info *); 76 int sr_set_blocklength(Scsi_CD *, int blocklength); 77 78 #endif 79