text: /*	$NetBSD: ataio.h,v 1.9 2012/01/24 20:04:07 jakllsch Exp $	*/
  
  #ifndef _SYS_ATAIO_H_
  #define _SYS_ATAIO_H_
  
  #include <sys/types.h>
  #include <sys/ioctl.h>
  
  typedef struct	atareq {
  	u_long	flags;		/* info about the request status and type */
  	u_char	command;	/* command code */
  	u_char	features;	/* feature modifier bits for command */
  	u_char	sec_count;	/* sector count */
  	u_char	sec_num;	/* sector number */
  	u_char	head;		/* head number */
  	u_short	cylinder;	/* cylinder/lba address */
  
  	void *	databuf;	/* Pointer to I/O data buffer */
  	u_long	datalen;	/* length of data buffer */
  	int	timeout;	/* Command timeout */
  	u_char	retsts;		/* the return status for the command */
  	u_char	error;		/* error bits */
  } atareq_t;
  
  /* bit definitions for flags */
  #define ATACMD_READ		0x00000001
  #define ATACMD_WRITE		0x00000002
  #define ATACMD_READREG		0x00000004
  #define ATACMD_LBA		0x00000008
  
  /* definitions for the return status (retsts) */
  #define ATACMD_OK	0x00
  #define ATACMD_TIMEOUT	0x01
  #define ATACMD_ERROR	0x02
  #define ATACMD_DF	0x03
  
  #define ATAIOCCOMMAND	_IOWR('Q', 8, atareq_t)
  
  /*
   * ATA bus IOCTL
   */
  /* Scan bus for new devices. */
  struct atabusioscan_args {
  	int	at_dev;		/* device to scan, -1 for wildcard */
  };
  #define ATABUSIOSCAN	_IOW('A', 50, struct atabusioscan_args)
  
  #define ATABUSIORESET	_IO('A', 51) /* reset ATA bus */
  
  struct atabusiodetach_args {
  	int	at_dev;		/* device to detach; -1 for wildcard */
  };
  #define ATABUSIODETACH	_IOW('A', 52, struct atabusiodetach_args)
  
  
  #endif /* _SYS_ATAIO_H_ */
  