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/* $Id: devops.c,v 1.4 1996/04/04 16:30:58 tridge Exp $
* devops.c: Device operations using the PROM.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#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)
{
int handle;
switch(prom_vers) {
case PROM_V0:
handle = (*(romvec->pv_v0devops.v0_devopen))(dstr);
if(handle == 0) return -1;
return handle;
break;
case PROM_V2:
case PROM_V3:
case PROM_P1275:
handle = (*(romvec->pv_v2devops.v2_dev_open))(dstr);
return handle;
break;
case PROM_AP1000:
break;
};
return -1;
}
/* Close the device described by device handle 'dhandle'. */
void
prom_close(int dhandle)
{
switch(prom_vers) {
case PROM_V0:
(*(romvec->pv_v0devops.v0_devclose))(dhandle);
return;
case PROM_V2:
case PROM_V3:
case PROM_P1275:
(*(romvec->pv_v2devops.v2_dev_close))(dhandle);
return;
case PROM_AP1000:
return;
};
return;
}
/* Seek to specified location described by 'seekhi' and 'seeklo'
* for device 'dhandle'.
*/
void
prom_seek(int dhandle, unsigned int seekhi, unsigned int seeklo)
{
switch(prom_vers) {
case PROM_V0:
(*(romvec->pv_v0devops.v0_seekdev))(dhandle, seekhi, seeklo);
break;
case PROM_V2:
case PROM_V3:
case PROM_P1275:
(*(romvec->pv_v2devops.v2_dev_seek))(dhandle, seekhi, seeklo);
break;
case PROM_AP1000:
break;
};
return;
}
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