/* $Id: devops.c,v 1.3 1997/10/29 07:43:28 ecd 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 0 on failure. */ int prom_devopen(const 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); }