include/linux/hdreg.h

/* */
   1 #ifndef _LINUX_HDREG_H
   2 #define _LINUX_HDREG_H
   3 
   4 /*
   5  * This file contains some defines for the AT-hd-controller.
   6  * Various sources. Check out some definitions (see comments with
   7  * a ques).
   8  */
   9 
  10 /* Hd controller regs. Ref: IBM AT Bios-listing */
  11 #define HD_DATA         0x1f0   /* _CTL when writing */
  12 #define HD_ERROR        0x1f1   /* see err-bits */
  13 #define HD_NSECTOR      0x1f2   /* nr of sectors to read/write */
  14 #define HD_SECTOR       0x1f3   /* starting sector */
  15 #define HD_LCYL         0x1f4   /* starting cylinder */
  16 #define HD_HCYL         0x1f5   /* high byte of starting cyl */
  17 #define HD_CURRENT      0x1f6   /* 101dhhhh , d=drive, hhhh=head */
  18 #define HD_STATUS       0x1f7   /* see status-bits */
  19 #define HD_PRECOMP HD_ERROR     /* same io address, read=error, write=precomp */
  20 #define HD_COMMAND HD_STATUS    /* same io address, read=status, write=cmd */
  21 
  22 #define HD_CMD          0x3f6
  23 
  24 /* Bits of HD_STATUS */
  25 #define ERR_STAT        0x01
  26 #define INDEX_STAT      0x02
  27 #define ECC_STAT        0x04    /* Corrected error */
  28 #define DRQ_STAT        0x08
  29 #define SEEK_STAT       0x10
  30 #define WRERR_STAT      0x20
  31 #define READY_STAT      0x40
  32 #define BUSY_STAT       0x80
  33 
  34 /* Values for HD_COMMAND */
  35 #define WIN_RESTORE             0x10
  36 #define WIN_READ                0x20
  37 #define WIN_WRITE               0x30
  38 #define WIN_VERIFY              0x40
  39 #define WIN_FORMAT              0x50
  40 #define WIN_INIT                0x60
  41 #define WIN_SEEK                0x70
  42 #define WIN_DIAGNOSE            0x90
  43 #define WIN_SPECIFY             0x91
  44 
  45 /* Bits for HD_ERROR */
  46 #define MARK_ERR        0x01    /* Bad address mark ? */
  47 #define TRK0_ERR        0x02    /* couldn't find track 0 */
  48 #define ABRT_ERR        0x04    /* ? */
  49 #define ID_ERR          0x10    /* ? */
  50 #define ECC_ERR         0x40    /* ? */
  51 #define BBD_ERR         0x80    /* ? */
  52 
  53 
  54 #define HDIO_REQ 0x301
  55 struct hd_geometry {
  56       unsigned char heads;
  57       unsigned char sectors;
  58       unsigned short cylinders;
  59       unsigned long start;
  60 };
  61 #endif
/* */
root/include/linux/hdreg.h

INCLUDED FROM
