*** dev/ata/ata-disk.c	Fri Sep  5 19:27:38 2003
--- dev/ata/ata-disk.c	Sun Nov  2 16:58:25 2003
***************
*** 90,98 ****
--- 90,100 ----
  static int ata_dma = 1;
  static int ata_wc = 1;
  static int ata_tags = 0; 
+ static int ata_suspend = 0;
  TUNABLE_INT("hw.ata.ata_dma", &ata_dma);
  TUNABLE_INT("hw.ata.wc", &ata_wc);
  TUNABLE_INT("hw.ata.tags", &ata_tags);
+ TUNABLE_INT("hw.ata.suspend", &ata_suspend);
  static MALLOC_DEFINE(M_AD, "AD driver", "ATA disk driver");
  
  /* sysctl vars */
***************
*** 103,108 ****
--- 105,112 ----
  	   "ATA disk write caching");
  SYSCTL_INT(_hw_ata, OID_AUTO, tags, CTLFLAG_RD, &ata_tags, 0,
  	   "ATA disk tagged queuing support");
+ SYSCTL_INT(_hw_ata, OID_AUTO, suspend, CTLFLAG_RD, &ata_suspend, 0,
+ 	   "ATA disk suspend timer");
  
  void
  ad_attach(struct ata_device *atadev, int alreadylocked)
***************
*** 197,202 ****
--- 201,214 ----
  		      DEVSTAT_TYPE_DIRECT | DEVSTAT_TYPE_IF_IDE,
  		      DEVSTAT_PRIORITY_DISK);
  
+ 	 if(ata_suspend > 0) {
+ 		 /* attempt suspend mode.  The drive uses increments of ten seconds */
+ 		 if(ata_command(atadev, 0xe2, 0, ata_suspend/10, 0, ATA_WAIT_INTR))
+ 			 ata_prtdev(atadev, "suspend mode failed.");
+ 	 }
+ 
+ 
+ 
      dev = disk_create(adp->lun, &adp->disk, 0, &ad_cdevsw, &addisk_cdevsw);
      dev->si_drv1 = adp;
      dev->si_iosize_max = 256 * DEV_BSIZE;
***************
*** 907,912 ****
--- 919,929 ----
  		    ata_umode(adp->device->param));
      else
  	ata_dmainit(atadev, ata_pmode(adp->device->param), -1, -1);
+ 	 if(ata_suspend > 0) {
+ 		 /* attempt suspend mode.  The drive uses increments of ten seconds */
+ 		 if(ata_command(atadev, 0xe2, 0, ata_suspend/10, 0, ATA_WAIT_READY))
+ 			 ata_prtdev(atadev, "suspend mode failed.");
+ 	 }
  }
  
  void