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 */
34 extern int mca_find_adapter(int id, int start);
35 extern int mca_find_unused_adapter(int id, int start);
36
37 extern int mca_is_adapter_used(int slot);
38 extern int mca_mark_as_used(int slot);
39 extern void mca_mark_as_unused(int slot);
40
41 /* gets a byte out of POS register (stored in memory) */
42 extern unsigned char mca_read_stored_pos(int slot, int reg);
43
44 /* This can be expanded later. Right now, it gives us a way of
45 * getting meaningful information into the MCA_info structure,
46 * so we can have a more interesting /proc/mca.
47 */
48 extern void mca_set_adapter_name(int slot, char* name);
49
50 /* These routines actually mess with the hardware POS registers. They
51 * temporarily disable the device (and interrupts), so make sure you know
52 * what you're doing if you use them. Furthermore, writing to a POS may
53 * result in two devices trying to share a resource, which in turn can
54 * result in multiple devices sharing memory spaces, IRQs, or even trashing
55 * hardware. YOU HAVE BEEN WARNED.
56 *
57 * You can only access slots with this. Motherboard registers are off
58 * limits.
59 */
60
61 /* read a byte from the specified POS register. */
62 extern unsigned char mca_read_pos(int slot, int reg);
63
64 /* write a byte to the specified POS register. */
65 extern void mca_write_pos(int slot, int reg, unsigned char byte);
66
67 #endif
68
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