LXR linux/include/linux/mca-legacy.h

   1/* -*- mode: c; c-basic-offset: 8 -*- */
   2
   3/* This is the function prototypes for the old legacy MCA interface
   4 *
   5 * Please move your driver to the new sysfs based one instead */
   6
   7#ifndef _LINUX_MCA_LEGACY_H
   8#define _LINUX_MCA_LEGACY_H
   9
  10#include <linux/mca.h>
  11
  12#warning "MCA legacy - please move your driver to the new sysfs api"
  13
  14/* MCA_NOTFOUND is an error condition.  The other two indicate
  15 * motherboard POS registers contain the adapter.  They might be
  16 * returned by the mca_find_adapter() function, and can be used as
  17 * arguments to mca_read_stored_pos().  I'm not going to allow direct
  18 * access to the motherboard registers until we run across an adapter
  19 * that requires it.  We don't know enough about them to know if it's
  20 * safe.
  21 *
  22 * See Documentation/mca.txt or one of the existing drivers for
  23 * more information.
  24 */
  25#define MCA_NOTFOUND    (-1)
  26
  27
  28
  29/* Returns the slot of the first enabled adapter matching id.  User can
  30 * specify a starting slot beyond zero, to deal with detecting multiple
  31 * devices.  Returns MCA_NOTFOUND if id not found.  Also checks the
  32 * integrated adapters.
  33 */
  34extern int mca_find_adapter(int id, int start);
  35extern int mca_find_unused_adapter(int id, int start);
  36
  37extern int mca_mark_as_used(int slot);
  38extern void mca_mark_as_unused(int slot);
  39
  40/* gets a byte out of POS register (stored in memory) */
  41extern unsigned char mca_read_stored_pos(int slot, int reg);
  42
  43/* This can be expanded later.  Right now, it gives us a way of
  44 * getting meaningful information into the MCA_info structure,
  45 * so we can have a more interesting /proc/mca.
  46 */
  47extern void mca_set_adapter_name(int slot, char* name);
  48
  49/* These routines actually mess with the hardware POS registers.  They
  50 * temporarily disable the device (and interrupts), so make sure you know
  51 * what you're doing if you use them.  Furthermore, writing to a POS may
  52 * result in two devices trying to share a resource, which in turn can
  53 * result in multiple devices sharing memory spaces, IRQs, or even trashing
  54 * hardware.  YOU HAVE BEEN WARNED.
  55 *
  56 * You can only access slots with this.  Motherboard registers are off
  57 * limits.
  58 */
  59
  60/* read a byte from the specified POS register. */
  61extern unsigned char mca_read_pos(int slot, int reg);
  62
  63/* write a byte to the specified POS register. */
  64extern void mca_write_pos(int slot, int reg, unsigned char byte);
  65
  66#endif
  67