2 * devops.c: Device operations using the PROM.
4 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
5 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
7 #include <linux/types.h>
8 #include <linux/kernel.h>
9 #include <linux/sched.h>
11 #include <asm/openprom.h>
12 #include <asm/oplib.h>
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.
19 prom_devopen(const char *dstr)
21 return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)|
26 /* Close the device described by device handle 'dhandle'. */
28 prom_devclose(int dhandle)
30 p1275_cmd ("close", P1275_INOUT(1,0), dhandle);
34 /* Seek to specified location described by 'seekhi' and 'seeklo'
35 * for device 'dhandle'.
38 prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
40 p1275_cmd ("seek", P1275_INOUT(3,1), dhandle, seekhi, seeklo);