1 /* -*- mode: c; c-basic-offset: 8 -*- */
3 /* This is the function prototypes for the old legacy MCA interface
5 * Please move your driver to the new sysfs based one instead */
7 #ifndef _LINUX_MCA_LEGACY_H
8 #define _LINUX_MCA_LEGACY_H
10 #include <linux/mca.h>
12 #warning "MCA legacy - please move your driver to the new sysfs api"
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
22 * See Documentation/mca.txt or one of the existing drivers for
25 #define MCA_NOTFOUND (-1)
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.
34 extern int mca_find_adapter(int id
, int start
);
35 extern int mca_find_unused_adapter(int id
, int start
);
37 extern int mca_mark_as_used(int slot
);
38 extern void mca_mark_as_unused(int slot
);
40 /* gets a byte out of POS register (stored in memory) */
41 extern unsigned char mca_read_stored_pos(int slot
, int reg
);
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.
47 extern void mca_set_adapter_name(int slot
, char* name
);
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.
56 * You can only access slots with this. Motherboard registers are off
60 /* read a byte from the specified POS register. */
61 extern unsigned char mca_read_pos(int slot
, int reg
);
63 /* write a byte to the specified POS register. */
64 extern void mca_write_pos(int slot
, int reg
, unsigned char byte
);
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