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68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
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/* -*- mode: c; c-basic-offset: 8 -*- */
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/* This is the function prototypes for the old legacy MCA interface
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*
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* Please move your driver to the new sysfs based one instead */
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#ifndef _LINUX_MCA_LEGACY_H
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#define _LINUX_MCA_LEGACY_H
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#include <linux/mca.h>
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#warning "MCA legacy - please move your driver to the new sysfs api"
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/* MCA_NOTFOUND is an error condition. The other two indicate
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* motherboard POS registers contain the adapter. They might be
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* returned by the mca_find_adapter() function, and can be used as
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* arguments to mca_read_stored_pos(). I'm not going to allow direct
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* access to the motherboard registers until we run across an adapter
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* that requires it. We don't know enough about them to know if it's
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* safe.
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*
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* See Documentation/mca.txt or one of the existing drivers for
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* more information.
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*/
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#define MCA_NOTFOUND (-1)
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/* Returns the slot of the first enabled adapter matching id. User can
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* specify a starting slot beyond zero, to deal with detecting multiple
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* devices. Returns MCA_NOTFOUND if id not found. Also checks the
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* integrated adapters.
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*/
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extern int mca_find_adapter(int id, int start);
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extern int mca_find_unused_adapter(int id, int start);
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extern int mca_is_adapter_used(int slot);
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extern int mca_mark_as_used(int slot);
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extern void mca_mark_as_unused(int slot);
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/* gets a byte out of POS register (stored in memory) */
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extern unsigned char mca_read_stored_pos(int slot, int reg);
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/* This can be expanded later. Right now, it gives us a way of
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* getting meaningful information into the MCA_info structure,
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* so we can have a more interesting /proc/mca.
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*/
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extern void mca_set_adapter_name(int slot, char* name);
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/* These routines actually mess with the hardware POS registers. They
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* temporarily disable the device (and interrupts), so make sure you know
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* what you're doing if you use them. Furthermore, writing to a POS may
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* result in two devices trying to share a resource, which in turn can
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* result in multiple devices sharing memory spaces, IRQs, or even trashing
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* hardware. YOU HAVE BEEN WARNED.
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*
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* You can only access slots with this. Motherboard registers are off
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* limits.
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*/
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/* read a byte from the specified POS register. */
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extern unsigned char mca_read_pos(int slot, int reg);
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/* write a byte to the specified POS register. */
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extern void mca_write_pos(int slot, int reg, unsigned char byte);
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#endif
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