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/*
* Creation Date: <2002/10/03 20:55:02 samuel>
* Time-stamp: <2002/10/29 13:00:23 samuel>
*
* <prom.c>
*
* oftree interface
*
* Copyright (C) 2002, 2003 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation
*
*/
#include "config.h"
#include "osi_calls.h"
#include "mol/prom.h"
/* OSI_PromClose (free linux side device tree) */
int
prom_close( void )
{
return OSI_PromIface( kPromClose, 0 );
}
/* ret: 0 no more peers, -1 if error */
mol_phandle_t
prom_peer( mol_phandle_t phandle )
{
return OSI_PromIface( kPromPeer, phandle );
}
/* ret: 0 no child, -1 if error */
mol_phandle_t
prom_child( mol_phandle_t phandle )
{
return OSI_PromIface( kPromChild, phandle );
}
/* ret: 0 if root node, -1 if error */
mol_phandle_t
prom_parent( mol_phandle_t phandle )
{
return OSI_PromIface( kPromParent, phandle );
}
/* ret: -1 error */
int
prom_package_to_path( mol_phandle_t phandle, char *buf, long buflen )
{
return OSI_PromIface2( kPromPackageToPath, phandle, (int)buf, buflen );
}
/* ret: -1 error */
int
prom_get_prop_len( mol_phandle_t phandle, const char *name )
{
return OSI_PromIface1( kPromGetPropLen, phandle, (int)name );
}
/* ret: prop len or -1 if error */
int
prom_get_prop( mol_phandle_t phandle, const char *name, char *buf, long buflen )
{
return OSI_PromIface3( kPromGetProp, phandle, (int)name, (int)buf, buflen );
}
/* ret: prop len or -1 if error */
int
prom_get_prop_by_path( const char *path, const char *name, char *buf, long buflen )
{
mol_phandle_t ph = prom_find_device(path);
return (ph != -1)? prom_get_prop( ph, name, buf, buflen) : -1;
}
/* ret: -1 error, 0 last prop, 1 otherwise */
int
prom_next_prop( mol_phandle_t phandle, const char *prev, char *buf )
{
return OSI_PromIface2( kPromNextProp, phandle, (int)prev, (int)buf );
}
/* ret: -1 if error */
int
prom_set_prop( mol_phandle_t phandle, const char *name, char *buf, long buflen )
{
return OSI_PromIface3( kPromSetProp, phandle, (int)name, (int)buf, buflen );
}
/* ret: -1 if error */
mol_phandle_t
prom_create_node( const char *path )
{
return OSI_PromPathIface( kPromCreateNode, path );
}
/* ret: -1 if not found */
mol_phandle_t
prom_find_device( const char *path )
{
mol_phandle_t ph;
char buf2[256], ch, *p;
if( !path )
return -1;
if( (ph=OSI_PromPathIface( kPromFindDevice, path )) != -1 )
return ph;
else if( path[0] == '/' )
return -1;
/* might be an alias */
if( !(p=strpbrk(path, "@:/")) )
p = (char*)path + strlen(path);
ch = *p;
*p = 0;
if( (ph=prom_get_prop(prom_find_device("/aliases"), path, buf2, sizeof(buf2))) == -1 )
return -1;
*p = ch;
strncat( buf2, p, sizeof(buf2) );
if( buf2[0] != '/' ) {
printk("Error: aliases must be absolute!\n");
return -1;
}
ph = OSI_PromPathIface( kPromFindDevice, buf2 );
return ph;
}
/************************************************************************/
/* search the tree for nodes with matching device_type */
/************************************************************************/
static mol_phandle_t
prom_find_device_type_( mol_phandle_t ph, const char *type, int *icount, int index )
{
char buf[64];
int ph2;
if( ph == -1 || !ph )
return -1;
if( prom_get_prop( ph, "device_type", buf, sizeof(buf)) > 0 )
if( !strcmp(buf, type) )
if( (*icount)++ == index )
return ph;
if( (ph2=prom_find_device_type_( prom_peer(ph), type, icount, index )) != -1 )
return ph2;
if( (ph2=prom_find_device_type_( prom_child(ph), type, icount, index )) != -1 )
return ph2;
return -1;
}
mol_phandle_t
prom_find_device_type( const char *type, int index )
{
int count = 0;
return prom_find_device_type_( prom_peer(0), type, &count, index );
}
/************************************************************************/
/* device tree tweaking */
/************************************************************************/
/* -1 if error */
int
prom_change_phandle( mol_phandle_t old_ph, mol_phandle_t new_ph )
{
return OSI_PromIface1( kPromChangePHandle, old_ph, (int)new_ph );
}
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