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/* $Id: devops.c,v 1.2 1997/02/25 12:40:20 jj Exp $
* devops.c: Device operations using the PROM.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <asm/openprom.h>
#include <asm/oplib.h>
/* Open the device described by the string 'dstr'. Returns the handle
* to that device used for subsequent operations on that device.
* Returns -1 on failure.
*/
int
prom_devopen(char *dstr)
{
return p1275_cmd ("open", P1275_ARG(0,P1275_ARG_IN_STRING)|
P1275_INOUT(1,1),
dstr);
}
/* Close the device described by device handle 'dhandle'. */
int
prom_devclose(int dhandle)
{
p1275_cmd ("close", P1275_INOUT(1,0), dhandle);
return 0;
}
/* Seek to specified location described by 'seekhi' and 'seeklo'
* for device 'dhandle'.
*/
void
prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
{
p1275_cmd ("seek", P1275_INOUT(3,1), dhandle, seekhi, seeklo);
}
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