arch/sparc/prom/tree_64.c - kernel/msm-4.9 - Gitiles

 /*
  * tree.c: Basic device tree traversal/scanning for the Linux
  *         prom library.
  *
  * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
  * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
  */

 #include <linux/string.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #include <linux/sched.h>
 #include <linux/module.h>

 #include <asm/openprom.h>
 #include <asm/oplib.h>
 #include <asm/ldc.h>

 static int prom_node_to_node(const char *type, int node)
 {
 	unsigned long args[5];

 	args[0] = (unsigned long) type;
 	args[1] = 1;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[4];
 }

 /* Return the child of node 'node' or zero if no this node has no
  * direct descendent.
  */
 inline int __prom_getchild(int node)
 {
 	return prom_node_to_node("child", node);
 }

 inline int prom_getchild(int node)
 {
 	int cnode;

 	if (node == -1)
 		return 0;
 	cnode = __prom_getchild(node);
 	if (cnode == -1)
 		return 0;
 	return cnode;
 }
 EXPORT_SYMBOL(prom_getchild);

 inline int prom_getparent(int node)
 {
 	int cnode;

 	if (node == -1)
 		return 0;
 	cnode = prom_node_to_node("parent", node);
 	if (cnode == -1)
 		return 0;
 	return cnode;
 }

 /* Return the next sibling of node 'node' or zero if no more siblings
  * at this level of depth in the tree.
  */
 inline int __prom_getsibling(int node)
 {
 	return prom_node_to_node(prom_peer_name, node);
 }

 inline int prom_getsibling(int node)
 {
 	int sibnode;

 	if (node == -1)
 		return 0;
 	sibnode = __prom_getsibling(node);
 	if (sibnode == -1)
 		return 0;

 	return sibnode;
 }
 EXPORT_SYMBOL(prom_getsibling);

 /* Return the length in bytes of property 'prop' at node 'node'.
  * Return -1 on error.
  */
 inline int prom_getproplen(int node, const char *prop)
 {
 	unsigned long args[6];

 	if (!node || !prop)
 		return -1;

 	args[0] = (unsigned long) "getproplen";
 	args[1] = 2;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = (unsigned long) prop;
 	args[5] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[5];
 }
 EXPORT_SYMBOL(prom_getproplen);

 /* Acquire a property 'prop' at node 'node' and place it in
  * 'buffer' which has a size of 'bufsize'.  If the acquisition
  * was successful the length will be returned, else -1 is returned.
  */
 inline int prom_getproperty(int node, const char *prop,
 			    char *buffer, int bufsize)
 {
 	unsigned long args[8];
 	int plen;

 	plen = prom_getproplen(node, prop);
 	if ((plen > bufsize) || (plen == 0) || (plen == -1))
 		return -1;

 	args[0] = (unsigned long) prom_getprop_name;
 	args[1] = 4;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = (unsigned long) prop;
 	args[5] = (unsigned long) buffer;
 	args[6] = bufsize;
 	args[7] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[7];
 }
 EXPORT_SYMBOL(prom_getproperty);

 /* Acquire an integer property and return its value.  Returns -1
  * on failure.
  */
 inline int prom_getint(int node, const char *prop)
 {
 	int intprop;

 	if (prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1)
 		return intprop;

 	return -1;
 }
 EXPORT_SYMBOL(prom_getint);

 /* Acquire an integer property, upon error return the passed default
  * integer.
  */

 int prom_getintdefault(int node, const char *property, int deflt)
 {
 	int retval;

 	retval = prom_getint(node, property);
 	if (retval == -1)
 		return deflt;

 	return retval;
 }
 EXPORT_SYMBOL(prom_getintdefault);

 /* Acquire a boolean property, 1=TRUE 0=FALSE. */
 int prom_getbool(int node, const char *prop)
 {
 	int retval;

 	retval = prom_getproplen(node, prop);
 	if (retval == -1)
 		return 0;
 	return 1;
 }
 EXPORT_SYMBOL(prom_getbool);

 /* Acquire a property whose value is a string, returns a null
  * string on error.  The char pointer is the user supplied string
  * buffer.
  */
 void prom_getstring(int node, const char *prop, char *user_buf, int ubuf_size)
 {
 	int len;

 	len = prom_getproperty(node, prop, user_buf, ubuf_size);
 	if (len != -1)
 		return;
 	user_buf[0] = 0;
 }
 EXPORT_SYMBOL(prom_getstring);

 /* Does the device at node 'node' have name 'name'?
  * YES = 1   NO = 0
  */
 int prom_nodematch(int node, const char *name)
 {
 	char namebuf[128];
 	prom_getproperty(node, "name", namebuf, sizeof(namebuf));
 	if (strcmp(namebuf, name) == 0)
 		return 1;
 	return 0;
 }

 /* Search siblings at 'node_start' for a node with name
  * 'nodename'.  Return node if successful, zero if not.
  */
 int prom_searchsiblings(int node_start, const char *nodename)
 {

 	int thisnode, error;
 	char promlib_buf[128];

 	for(thisnode = node_start; thisnode;
 	    thisnode=prom_getsibling(thisnode)) {
 		error = prom_getproperty(thisnode, "name", promlib_buf,
 					 sizeof(promlib_buf));
 		/* Should this ever happen? */
 		if(error == -1) continue;
 		if(strcmp(nodename, promlib_buf)==0) return thisnode;
 	}

 	return 0;
 }
 EXPORT_SYMBOL(prom_searchsiblings);

 static const char *prom_nextprop_name = "nextprop";

 /* Return the first property type for node 'node'.
  * buffer should be at least 32B in length
  */
 inline char *prom_firstprop(int node, char *buffer)
 {
 	unsigned long args[7];

 	*buffer = 0;
 	if (node == -1)
 		return buffer;

 	args[0] = (unsigned long) prom_nextprop_name;
 	args[1] = 3;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = 0;
 	args[5] = (unsigned long) buffer;
 	args[6] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return buffer;
 }
 EXPORT_SYMBOL(prom_firstprop);

 /* Return the property type string after property type 'oprop'
  * at node 'node' .  Returns NULL string if no more
  * property types for this node.
  */
 inline char *prom_nextprop(int node, const char *oprop, char *buffer)
 {
 	unsigned long args[7];
 	char buf[32];

 	if (node == -1) {
 		*buffer = 0;
 		return buffer;
 	}
 	if (oprop == buffer) {
 		strcpy (buf, oprop);
 		oprop = buf;
 	}

 	args[0] = (unsigned long) prom_nextprop_name;
 	args[1] = 3;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = (unsigned long) oprop;
 	args[5] = (unsigned long) buffer;
 	args[6] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return buffer;
 }
 EXPORT_SYMBOL(prom_nextprop);

 int
 prom_finddevice(const char *name)
 {
 	unsigned long args[5];

 	if (!name)
 		return 0;
 	args[0] = (unsigned long) "finddevice";
 	args[1] = 1;
 	args[2] = 1;
 	args[3] = (unsigned long) name;
 	args[4] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[4];
 }
 EXPORT_SYMBOL(prom_finddevice);

 int prom_node_has_property(int node, const char *prop)
 {
 	char buf [32];

 	*buf = 0;
 	do {
 		prom_nextprop(node, buf, buf);
 		if (!strcmp(buf, prop))
 			return 1;
 	} while (*buf);
 	return 0;
 }
 EXPORT_SYMBOL(prom_node_has_property);

 /* Set property 'pname' at node 'node' to value 'value' which has a length
  * of 'size' bytes.  Return the number of bytes the prom accepted.
  */
 int
 prom_setprop(int node, const char *pname, char *value, int size)
 {
 	unsigned long args[8];

 	if (size == 0)
 		return 0;
 	if ((pname == 0) || (value == 0))
 		return 0;

 #ifdef CONFIG_SUN_LDOMS
 	if (ldom_domaining_enabled) {
 		ldom_set_var(pname, value);
 		return 0;
 	}
 #endif
 	args[0] = (unsigned long) "setprop";
 	args[1] = 4;
 	args[2] = 1;
 	args[3] = (unsigned int) node;
 	args[4] = (unsigned long) pname;
 	args[5] = (unsigned long) value;
 	args[6] = size;
 	args[7] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[7];
 }
 EXPORT_SYMBOL(prom_setprop);

 inline int prom_inst2pkg(int inst)
 {
 	unsigned long args[5];
 	int node;

 	args[0] = (unsigned long) "instance-to-package";
 	args[1] = 1;
 	args[2] = 1;
 	args[3] = (unsigned int) inst;
 	args[4] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	node = (int) args[4];
 	if (node == -1)
 		return 0;
 	return node;
 }

 /* Return 'node' assigned to a particular prom 'path'
  * FIXME: Should work for v0 as well
  */
 int
 prom_pathtoinode(const char *path)
 {
 	int node, inst;

 	inst = prom_devopen (path);
 	if (inst == 0)
 		return 0;
 	node = prom_inst2pkg(inst);
 	prom_devclose(inst);
 	if (node == -1)
 		return 0;
 	return node;
 }

 int prom_ihandle2path(int handle, char *buffer, int bufsize)
 {
 	unsigned long args[7];

 	args[0] = (unsigned long) "instance-to-path";
 	args[1] = 3;
 	args[2] = 1;
 	args[3] = (unsigned int) handle;
 	args[4] = (unsigned long) buffer;
 	args[5] = bufsize;
 	args[6] = (unsigned long) -1;

 	p1275_cmd_direct(args);

 	return (int) args[6];
 }
	/*
	* tree.c: Basic device tree traversal/scanning for the Linux
	* prom library.
	*
	* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
	* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
	*/

	#include <linux/string.h>
	#include <linux/types.h>
	#include <linux/kernel.h>
	#include <linux/sched.h>
	#include <linux/module.h>

	#include <asm/openprom.h>
	#include <asm/oplib.h>
	#include <asm/ldc.h>

	static int prom_node_to_node(const char *type, int node)
	{
	unsigned long args[5];

	args[0] = (unsigned long) type;
	args[1] = 1;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[4];
	}

	/* Return the child of node 'node' or zero if no this node has no
	* direct descendent.
	*/
	inline int __prom_getchild(int node)
	{
	return prom_node_to_node("child", node);
	}

	inline int prom_getchild(int node)
	{
	int cnode;

	if (node == -1)
	return 0;
	cnode = __prom_getchild(node);
	if (cnode == -1)
	return 0;
	return cnode;
	}
	EXPORT_SYMBOL(prom_getchild);

	inline int prom_getparent(int node)
	{
	int cnode;

	if (node == -1)
	return 0;
	cnode = prom_node_to_node("parent", node);
	if (cnode == -1)
	return 0;
	return cnode;
	}

	/* Return the next sibling of node 'node' or zero if no more siblings
	* at this level of depth in the tree.
	*/
	inline int __prom_getsibling(int node)
	{
	return prom_node_to_node(prom_peer_name, node);
	}

	inline int prom_getsibling(int node)
	{
	int sibnode;

	if (node == -1)
	return 0;
	sibnode = __prom_getsibling(node);
	if (sibnode == -1)
	return 0;

	return sibnode;
	}
	EXPORT_SYMBOL(prom_getsibling);

	/* Return the length in bytes of property 'prop' at node 'node'.
	* Return -1 on error.
	*/
	inline int prom_getproplen(int node, const char *prop)
	{
	unsigned long args[6];

	if (!node \|\| !prop)
	return -1;

	args[0] = (unsigned long) "getproplen";
	args[1] = 2;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = (unsigned long) prop;
	args[5] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[5];
	}
	EXPORT_SYMBOL(prom_getproplen);

	/* Acquire a property 'prop' at node 'node' and place it in
	* 'buffer' which has a size of 'bufsize'. If the acquisition
	* was successful the length will be returned, else -1 is returned.
	*/
	inline int prom_getproperty(int node, const char *prop,
	char *buffer, int bufsize)
	{
	unsigned long args[8];
	int plen;

	plen = prom_getproplen(node, prop);
	if ((plen > bufsize) \|\| (plen == 0) \|\| (plen == -1))
	return -1;

	args[0] = (unsigned long) prom_getprop_name;
	args[1] = 4;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = (unsigned long) prop;
	args[5] = (unsigned long) buffer;
	args[6] = bufsize;
	args[7] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[7];
	}
	EXPORT_SYMBOL(prom_getproperty);

	/* Acquire an integer property and return its value. Returns -1
	* on failure.
	*/
	inline int prom_getint(int node, const char *prop)
	{
	int intprop;

	if (prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1)
	return intprop;

	return -1;
	}
	EXPORT_SYMBOL(prom_getint);

	/* Acquire an integer property, upon error return the passed default
	* integer.
	*/

	int prom_getintdefault(int node, const char *property, int deflt)
	{
	int retval;

	retval = prom_getint(node, property);
	if (retval == -1)
	return deflt;

	return retval;
	}
	EXPORT_SYMBOL(prom_getintdefault);

	/* Acquire a boolean property, 1=TRUE 0=FALSE. */
	int prom_getbool(int node, const char *prop)
	{
	int retval;

	retval = prom_getproplen(node, prop);
	if (retval == -1)
	return 0;
	return 1;
	}
	EXPORT_SYMBOL(prom_getbool);

	/* Acquire a property whose value is a string, returns a null
	* string on error. The char pointer is the user supplied string
	* buffer.
	*/
	void prom_getstring(int node, const char prop, char user_buf, int ubuf_size)
	{
	int len;

	len = prom_getproperty(node, prop, user_buf, ubuf_size);
	if (len != -1)
	return;
	user_buf[0] = 0;
	}
	EXPORT_SYMBOL(prom_getstring);

	/* Does the device at node 'node' have name 'name'?
	* YES = 1 NO = 0
	*/
	int prom_nodematch(int node, const char *name)
	{
	char namebuf[128];
	prom_getproperty(node, "name", namebuf, sizeof(namebuf));
	if (strcmp(namebuf, name) == 0)
	return 1;
	return 0;
	}

	/* Search siblings at 'node_start' for a node with name
	* 'nodename'. Return node if successful, zero if not.
	*/
	int prom_searchsiblings(int node_start, const char *nodename)
	{

	int thisnode, error;
	char promlib_buf[128];

	for(thisnode = node_start; thisnode;
	thisnode=prom_getsibling(thisnode)) {
	error = prom_getproperty(thisnode, "name", promlib_buf,
	sizeof(promlib_buf));
	/* Should this ever happen? */
	if(error == -1) continue;
	if(strcmp(nodename, promlib_buf)==0) return thisnode;
	}

	return 0;
	}
	EXPORT_SYMBOL(prom_searchsiblings);

	static const char *prom_nextprop_name = "nextprop";

	/* Return the first property type for node 'node'.
	* buffer should be at least 32B in length
	*/
	inline char prom_firstprop(int node, char buffer)
	{
	unsigned long args[7];

	*buffer = 0;
	if (node == -1)
	return buffer;

	args[0] = (unsigned long) prom_nextprop_name;
	args[1] = 3;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = 0;
	args[5] = (unsigned long) buffer;
	args[6] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return buffer;
	}
	EXPORT_SYMBOL(prom_firstprop);

	/* Return the property type string after property type 'oprop'
	* at node 'node' . Returns NULL string if no more
	* property types for this node.
	*/
	inline char prom_nextprop(int node, const char oprop, char *buffer)
	{
	unsigned long args[7];
	char buf[32];

	if (node == -1) {
	*buffer = 0;
	return buffer;
	}
	if (oprop == buffer) {
	strcpy (buf, oprop);
	oprop = buf;
	}

	args[0] = (unsigned long) prom_nextprop_name;
	args[1] = 3;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = (unsigned long) oprop;
	args[5] = (unsigned long) buffer;
	args[6] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return buffer;
	}
	EXPORT_SYMBOL(prom_nextprop);

	int
	prom_finddevice(const char *name)
	{
	unsigned long args[5];

	if (!name)
	return 0;
	args[0] = (unsigned long) "finddevice";
	args[1] = 1;
	args[2] = 1;
	args[3] = (unsigned long) name;
	args[4] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[4];
	}
	EXPORT_SYMBOL(prom_finddevice);

	int prom_node_has_property(int node, const char *prop)
	{
	char buf [32];

	*buf = 0;
	do {
	prom_nextprop(node, buf, buf);
	if (!strcmp(buf, prop))
	return 1;
	} while (*buf);
	return 0;
	}
	EXPORT_SYMBOL(prom_node_has_property);

	/* Set property 'pname' at node 'node' to value 'value' which has a length
	* of 'size' bytes. Return the number of bytes the prom accepted.
	*/
	int
	prom_setprop(int node, const char pname, char value, int size)
	{
	unsigned long args[8];

	if (size == 0)
	return 0;
	if ((pname == 0) \|\| (value == 0))
	return 0;

	#ifdef CONFIG_SUN_LDOMS
	if (ldom_domaining_enabled) {
	ldom_set_var(pname, value);
	return 0;
	}
	#endif
	args[0] = (unsigned long) "setprop";
	args[1] = 4;
	args[2] = 1;
	args[3] = (unsigned int) node;
	args[4] = (unsigned long) pname;
	args[5] = (unsigned long) value;
	args[6] = size;
	args[7] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[7];
	}
	EXPORT_SYMBOL(prom_setprop);

	inline int prom_inst2pkg(int inst)
	{
	unsigned long args[5];
	int node;

	args[0] = (unsigned long) "instance-to-package";
	args[1] = 1;
	args[2] = 1;
	args[3] = (unsigned int) inst;
	args[4] = (unsigned long) -1;

	p1275_cmd_direct(args);

	node = (int) args[4];
	if (node == -1)
	return 0;
	return node;
	}

	/* Return 'node' assigned to a particular prom 'path'
	* FIXME: Should work for v0 as well
	*/
	int
	prom_pathtoinode(const char *path)
	{
	int node, inst;

	inst = prom_devopen (path);
	if (inst == 0)
	return 0;
	node = prom_inst2pkg(inst);
	prom_devclose(inst);
	if (node == -1)
	return 0;
	return node;
	}

	int prom_ihandle2path(int handle, char *buffer, int bufsize)
	{
	unsigned long args[7];

	args[0] = (unsigned long) "instance-to-path";
	args[1] = 3;
	args[2] = 1;
	args[3] = (unsigned int) handle;
	args[4] = (unsigned long) buffer;
	args[5] = bufsize;
	args[6] = (unsigned long) -1;

	p1275_cmd_direct(args);

	return (int) args[6];
	}