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1da177e4 LT |
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 |