[PATCH] ide-cd: capability flag for MO drives

From: Pascal Schmidt <der.eremit@email.de>

Add capability flag for MO drives. Since ATAPI MOs are now recognized
by the ide-cd driver, it is useful to have a capability flag to be able
to tell MO drives from other drives (needed for later write support).

drivers/ide/ide-cd.c

@@ -2805,7 +2805,7 @@ static struct cdrom_device_ops ide_cdrom_dops = {
 				CDC_MEDIA_CHANGED | CDC_PLAY_AUDIO | CDC_RESET |
 				CDC_IOCTLS | CDC_DRIVE_STATUS | CDC_CD_R |
 				CDC_CD_RW | CDC_DVD | CDC_DVD_R| CDC_DVD_RAM |
-				CDC_GENERIC_PACKET,
+				CDC_GENERIC_PACKET | CDC_MO_DRIVE,
 	.generic_packet		= ide_cdrom_packet,
 };
 
@@ -2838,6 +2838,8 @@ static int ide_cdrom_register (ide_drive_t *drive, int nslots)
 		devinfo->mask |= CDC_PLAY_AUDIO;
 	if (!CDROM_CONFIG_FLAGS(drive)->close_tray)
 		devinfo->mask |= CDC_CLOSE_TRAY;
+	if (!CDROM_CONFIG_FLAGS(drive)->mo_drive)
+		devinfo->mask |= CDC_MO_DRIVE;
 
 	return register_cdrom(devinfo);
 }
@@ -2884,6 +2886,7 @@ int ide_cdrom_probe_capabilities (ide_drive_t *drive)
 	int nslots = 1;
 
 	if (drive->media == ide_optical) {
+		CDROM_CONFIG_FLAGS(drive)->mo_drive = 1;
 		printk("%s: ATAPI magneto-optical drive\n", drive->name);
 		return nslots;
 	}

drivers/ide/ide-cd.h

@@ -85,7 +85,8 @@ struct ide_cd_config_flags {
 	__u8 audio_play		: 1; /* can do audio related commands */
 	__u8 close_tray		: 1; /* can close the tray */
 	__u8 writing		: 1; /* pseudo write in progress */
-	__u8 reserved		: 3;
+	__u8 mo_drive		: 1; /* drive is an MO device */
+	__u8 reserved		: 2;
 	byte max_speed;		     /* Max speed of the drive */
 };
 #define CDROM_CONFIG_FLAGS(drive) (&(((struct cdrom_info *)(drive->driver_data))->config_flags))

include/linux/cdrom.h

@@ -387,6 +387,7 @@ struct cdrom_generic_command
 #define CDC_DVD			0x8000	/* drive is a DVD */
 #define CDC_DVD_R		0x10000	/* drive can write DVD-R */
 #define CDC_DVD_RAM		0x20000	/* drive can write DVD-RAM */
+#define CDC_MO_DRIVE		0x40000 /* drive is an MO device */
 
 /* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
 #define CDS_NO_INFO		0	/* if not implemented */