1 /* 2 * sr.h by David Giller 3 * CD-ROM disk driver header file 4 * 5 * adapted from: 6 * sd.h Copyright (C) 1992 Drew Eckhardt 7 * SCSI disk driver header file by 8 * Drew Eckhardt 9 * 10 * <drew@colorado.edu> 11 * 12 * Modified by Eric Youngdale eric@andante.org to 13 * add scatter-gather, multiple outstanding request, and other 14 * enhancements. 15 */ 16 17 #ifndef _SR_H 18 #define _SR_H 19 20 #include <linux/genhd.h> 21 #include <linux/kref.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 struct scsi_driver *driver; 35 unsigned capacity; /* size in blocks */ 36 struct scsi_device *device; 37 unsigned int vendor; /* vendor code, see sr_vendor.c */ 38 unsigned long ms_offset; /* for reading multisession-CD's */ 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 /* We hold gendisk and scsi_device references on probe and use 53 * the refs on this kref to decide when to release them */ 54 struct kref kref; 55 struct gendisk *disk; 56 } Scsi_CD; 57 58 int sr_do_ioctl(Scsi_CD *, struct packet_command *); 59 60 int sr_lock_door(struct cdrom_device_info *, int); 61 int sr_tray_move(struct cdrom_device_info *, int); 62 int sr_drive_status(struct cdrom_device_info *, int); 63 int sr_disk_status(struct cdrom_device_info *); 64 int sr_get_last_session(struct cdrom_device_info *, struct cdrom_multisession *); 65 int sr_get_mcn(struct cdrom_device_info *, struct cdrom_mcn *); 66 int sr_reset(struct cdrom_device_info *); 67 int sr_select_speed(struct cdrom_device_info *cdi, int speed); 68 int sr_audio_ioctl(struct cdrom_device_info *, unsigned int, void *); 69 70 int sr_is_xa(Scsi_CD *); 71 72 /* sr_vendor.c */ 73 void sr_vendor_init(Scsi_CD *); 74 int sr_cd_check(struct cdrom_device_info *); 75 int sr_set_blocklength(Scsi_CD *, int blocklength); 76 77 #endif 78