Commit | Line | Data |
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b00dc837 | 1 | /* |
1da177e4 LT |
2 | * devops.c: Device operations using the PROM. |
3 | * | |
4 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
5 | * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
6 | */ | |
7 | #include <linux/types.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/sched.h> | |
10 | ||
11 | #include <asm/openprom.h> | |
12 | #include <asm/oplib.h> | |
13 | ||
14 | /* Open the device described by the string 'dstr'. Returns the handle | |
15 | * to that device used for subsequent operations on that device. | |
16 | * Returns 0 on failure. | |
17 | */ | |
18 | int | |
bff06d55 | 19 | prom_devopen(const char *dstr) |
1da177e4 LT |
20 | { |
21 | return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)| | |
22 | P1275_INOUT(1,1), | |
23 | dstr); | |
24 | } | |
25 | ||
26 | /* Close the device described by device handle 'dhandle'. */ | |
27 | int | |
28 | prom_devclose(int dhandle) | |
29 | { | |
30 | p1275_cmd ("close", P1275_INOUT(1,0), dhandle); | |
31 | return 0; | |
32 | } | |
33 | ||
34 | /* Seek to specified location described by 'seekhi' and 'seeklo' | |
35 | * for device 'dhandle'. | |
36 | */ | |
37 | void | |
38 | prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo) | |
39 | { | |
40 | p1275_cmd ("seek", P1275_INOUT(3,1), dhandle, seekhi, seeklo); | |
41 | } |