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#ifndef _LINUX_OF_H
#define _LINUX_OF_H
/*
* Definitions for talking to the Open Firmware PROM on
* Power Macintosh and other computers.
*
* Copyright (C) 1996-2005 Paul Mackerras.
*
* Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
* Updates for SPARC64 by David S. Miller
* Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
*
* 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; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/kref.h>
#include <linux/mod_devicetable.h>
#include <linux/spinlock.h>
#include <linux/topology.h>
#include <linux/notifier.h>
#include <asm/byteorder.h>
#include <asm/errno.h>
typedef u32 phandle;
typedef u32 ihandle;
struct property {
char *name;
int length;
void *value;
struct property *next;
unsigned long _flags;
unsigned int unique_id;
};
#if defined(CONFIG_SPARC)
struct of_irq_controller;
#endif
struct device_node {
const char *name;
const char *type;
phandle phandle;
const char *full_name;
struct property *properties;
struct property *deadprops; /* removed properties */
struct device_node *parent;
struct device_node *child;
struct device_node *sibling;
struct device_node *next; /* next device of same type */
struct device_node *allnext; /* next in list of all nodes */
struct proc_dir_entry *pde; /* this node's proc directory */
struct kref kref;
unsigned long _flags;
void *data;
#if defined(CONFIG_SPARC)
const char *path_component_name;
unsigned int unique_id;
struct of_irq_controller *irq_trans;
#endif
};
#define MAX_PHANDLE_ARGS 8
struct of_phandle_args {
struct device_node *np;
int args_count;
uint32_t args[MAX_PHANDLE_ARGS];
};
#ifdef CONFIG_OF_DYNAMIC
extern struct device_node *of_node_get(struct device_node *node);
extern void of_node_put(struct device_node *node);
#else /* CONFIG_OF_DYNAMIC */
/* Dummy ref counting routines - to be implemented later */
static inline struct device_node *of_node_get(struct device_node *node)
{
return node;
}
static inline void of_node_put(struct device_node *node) { }
#endif /* !CONFIG_OF_DYNAMIC */
#ifdef CONFIG_OF
/* Pointer for first entry in chain of all nodes. */
extern struct device_node *of_allnodes;
extern struct device_node *of_chosen;
extern struct device_node *of_aliases;
extern raw_spinlock_t devtree_lock;
static inline bool of_have_populated_dt(void)
{
return of_allnodes != NULL;
}
static inline bool of_node_is_root(const struct device_node *node)
{
return node && (node->parent == NULL);
}
static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
{
return test_bit(flag, &n->_flags);
}
static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
{
set_bit(flag, &n->_flags);
}
extern struct device_node *of_find_all_nodes(struct device_node *prev);
/*
* OF address retrieval & translation
*/
/* Helper to read a big number; size is in cells (not bytes) */
static inline u64 of_read_number(const __be32 *cell, int size)
{
u64 r = 0;
while (size--)
r = (r << 32) | be32_to_cpu(*(cell++));
return r;
}
/* Like of_read_number, but we want an unsigned long result */
static inline unsigned long of_read_ulong(const __be32 *cell, int size)
{
/* toss away upper bits if unsigned long is smaller than u64 */
return of_read_number(cell, size);
}
#if defined(CONFIG_SPARC)
#include <asm/prom.h>
#endif
/* Default #address and #size cells. Allow arch asm/prom.h to override */
#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
#endif
/* Default string compare functions, Allow arch asm/prom.h to override */
#if !defined(of_compat_cmp)
#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
#endif
/* flag descriptions */
#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
#define OF_DETACHED 2 /* node has been detached from the device tree */
#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
#define OF_BAD_ADDR ((u64)-1)
static inline const char *of_node_full_name(const struct device_node *np)
{
return np ? np->full_name : "<no-node>";
}
extern struct device_node *of_find_node_by_name(struct device_node *from,
const char *name);
#define for_each_node_by_name(dn, name) \
for (dn = of_find_node_by_name(NULL, name); dn; \
dn = of_find_node_by_name(dn, name))
extern struct device_node *of_find_node_by_type(struct device_node *from,
const char *type);
#define for_each_node_by_type(dn, type) \
for (dn = of_find_node_by_type(NULL, type); dn; \
dn = of_find_node_by_type(dn, type))
extern struct device_node *of_find_compatible_node(struct device_node *from,
const char *type, const char *compat);
#define for_each_compatible_node(dn, type, compatible) \
for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
dn = of_find_compatible_node(dn, type, compatible))
extern struct device_node *of_find_matching_node_and_match(
struct device_node *from,
const struct of_device_id *matches,
const struct of_device_id **match);
static inline struct device_node *of_find_matching_node(
struct device_node *from,
const struct of_device_id *matches)
{
return of_find_matching_node_and_match(from, matches, NULL);
}
#define for_each_matching_node(dn, matches) \
for (dn = of_find_matching_node(NULL, matches); dn; \
dn = of_find_matching_node(dn, matches))
#define for_each_matching_node_and_match(dn, matches, match) \
for (dn = of_find_matching_node_and_match(NULL, matches, match); \
dn; dn = of_find_matching_node_and_match(dn, matches, match))
extern struct device_node *of_find_node_opts_by_path(const char *path,
const char **opts);
static inline struct device_node *of_find_node_by_path(const char *path)
{
return of_find_node_opts_by_path(path, NULL);
}
extern struct device_node *of_find_node_by_phandle(phandle handle);
extern struct device_node *of_get_parent(const struct device_node *node);
extern struct device_node *of_get_next_parent(struct device_node *node);
extern struct device_node *of_get_next_child(const struct device_node *node,
struct device_node *prev);
extern struct device_node *of_get_next_available_child(
const struct device_node *node, struct device_node *prev);
extern struct device_node *of_get_child_by_name(const struct device_node *node,
const char *name);
#define for_each_child_of_node(parent, child) \
for (child = of_get_next_child(parent, NULL); child != NULL; \
child = of_get_next_child(parent, child))
#define for_each_available_child_of_node(parent, child) \
for (child = of_get_next_available_child(parent, NULL); child != NULL; \
child = of_get_next_available_child(parent, child))
static inline int of_get_child_count(const struct device_node *np)
{
struct device_node *child;
int num = 0;
for_each_child_of_node(np, child)
num++;
return num;
}
static inline int of_get_available_child_count(const struct device_node *np)
{
struct device_node *child;
int num = 0;
for_each_available_child_of_node(np, child)
num++;
return num;
}
/* cache lookup */
extern struct device_node *of_find_next_cache_node(const struct device_node *);
extern struct device_node *of_find_node_with_property(
struct device_node *from, const char *prop_name);
#define for_each_node_with_property(dn, prop_name) \
for (dn = of_find_node_with_property(NULL, prop_name); dn; \
dn = of_find_node_with_property(dn, prop_name))
extern struct property *of_find_property(const struct device_node *np,
const char *name,
int *lenp);
extern int of_property_read_u32_index(const struct device_node *np,
const char *propname,
u32 index, u32 *out_value);
extern int of_property_read_u8_array(const struct device_node *np,
const char *propname, u8 *out_values, size_t sz);
extern int of_property_read_u16_array(const struct device_node *np,
const char *propname, u16 *out_values, size_t sz);
extern int of_property_read_u32_array(const struct device_node *np,
const char *propname,
u32 *out_values,
size_t sz);
extern int of_property_read_u64(const struct device_node *np,
const char *propname, u64 *out_value);
extern int of_property_read_string(struct device_node *np,
const char *propname,
const char **out_string);
extern int of_property_match_string(struct device_node *np,
const char *propname,
const char *string);
extern int of_property_read_string_helper(struct device_node *np,
const char *propname,
const char **out_strs, size_t sz, int index);
extern int of_device_is_compatible(const struct device_node *device,
const char *);
extern int of_device_is_available(const struct device_node *device);
extern const void *of_get_property(const struct device_node *node,
const char *name,
int *lenp);
extern struct device_node *of_get_cpu_node(int cpu, unsigned int *thread);
#define for_each_property_of_node(dn, pp) \
for (pp = dn->properties; pp != NULL; pp = pp->next)
extern int of_n_addr_cells(struct device_node *np);
extern int of_n_size_cells(struct device_node *np);
extern const struct of_device_id *of_match_node(
const struct of_device_id *matches, const struct device_node *node);
extern int of_modalias_node(struct device_node *node, char *modalias, int len);
extern void of_print_phandle_args(const char *msg, const struct of_phandle_args *args);
extern struct device_node *of_parse_phandle(const struct device_node *np,
const char *phandle_name,
int index);
extern int of_parse_phandle_with_args(const struct device_node *np,
const char *list_name, const char *cells_name, int index,
struct of_phandle_args *out_args);
extern int of_parse_phandle_with_fixed_args(const struct device_node *np,
const char *list_name, int cells_count, int index,
struct of_phandle_args *out_args);
extern int of_count_phandle_with_args(const struct device_node *np,
const char *list_name, const char *cells_name);
extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
extern int of_alias_get_id(struct device_node *np, const char *stem);
extern int of_machine_is_compatible(const char *compat);
extern int of_add_property(struct device_node *np, struct property *prop);
extern int of_remove_property(struct device_node *np, struct property *prop);
extern int of_update_property(struct device_node *np, struct property *newprop);
/* For updating the device tree at runtime */
#define OF_RECONFIG_ATTACH_NODE 0x0001
#define OF_RECONFIG_DETACH_NODE 0x0002
#define OF_RECONFIG_ADD_PROPERTY 0x0003
#define OF_RECONFIG_REMOVE_PROPERTY 0x0004
#define OF_RECONFIG_UPDATE_PROPERTY 0x0005
struct of_prop_reconfig {
struct device_node *dn;
struct property *prop;
};
extern int of_reconfig_notifier_register(struct notifier_block *);
extern int of_reconfig_notifier_unregister(struct notifier_block *);
extern int of_reconfig_notify(unsigned long, void *);
extern int of_attach_node(struct device_node *);
extern int of_detach_node(struct device_node *);
#define of_match_ptr(_ptr) (_ptr)
/*
* struct property *prop;
* const __be32 *p;
* u32 u;
*
* of_property_for_each_u32(np, "propname", prop, p, u)
* printk("U32 value: %x\n", u);
*/
const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur,
u32 *pu);
/*
* struct property *prop;
* const char *s;
*
* of_property_for_each_string(np, "propname", prop, s)
* printk("String value: %s\n", s);
*/
const char *of_prop_next_string(struct property *prop, const char *cur);
bool of_console_check(struct device_node *dn, char *name, int index);
#else /* CONFIG_OF */
static inline const char* of_node_full_name(struct device_node *np)
{
return "<no-node>";
}
static inline struct device_node *of_find_node_by_name(struct device_node *from,
const char *name)
{
return NULL;
}
static inline struct device_node *of_get_parent(const struct device_node *node)
{
return NULL;
}
static inline bool of_have_populated_dt(void)
{
return false;
}
#define for_each_child_of_node(parent, child) \
while (0)
#define for_each_available_child_of_node(parent, child) \
while (0)
static inline struct device_node *of_get_child_by_name(
const struct device_node *node,
const char *name)
{
return NULL;
}
static inline int of_get_child_count(const struct device_node *np)
{
return 0;
}
static inline int of_get_available_child_count(const struct device_node *np)
{
return 0;
}
static inline int of_device_is_compatible(const struct device_node *device,
const char *name)
{
return 0;
}
static inline int of_device_is_available(const struct device_node *device)
{
return 0;
}
static inline struct property *of_find_property(const struct device_node *np,
const char *name,
int *lenp)
{
return NULL;
}
static inline struct device_node *of_find_compatible_node(
struct device_node *from,
const char *type,
const char *compat)
{
return NULL;
}
static inline int of_property_read_u32_index(const struct device_node *np,
const char *propname, u32 index, u32 *out_value)
{
return -ENOSYS;
}
static inline int of_property_read_u8_array(const struct device_node *np,
const char *propname, u8 *out_values, size_t sz)
{
return -ENOSYS;
}
static inline int of_property_read_u16_array(const struct device_node *np,
const char *propname, u16 *out_values, size_t sz)
{
return -ENOSYS;
}
static inline int of_property_read_u32_array(const struct device_node *np,
const char *propname,
u32 *out_values, size_t sz)
{
return -ENOSYS;
}
static inline int of_property_read_string(struct device_node *np,
const char *propname,
const char **out_string)
{
return -ENOSYS;
}
static inline int of_property_read_string_helper(struct device_node *np,
const char *propname,
const char **out_strs, size_t sz, int index)
{
return -ENOSYS;
}
static inline const void *of_get_property(const struct device_node *node,
const char *name,
int *lenp)
{
return NULL;
}
static inline struct device_node *of_get_cpu_node(int cpu,
unsigned int *thread)
{
return NULL;
}
static inline int of_property_read_u64(const struct device_node *np,
const char *propname, u64 *out_value)
{
return -ENOSYS;
}
static inline int of_property_match_string(struct device_node *np,
const char *propname,
const char *string)
{
return -ENOSYS;
}
static inline struct device_node *of_parse_phandle(const struct device_node *np,
const char *phandle_name,
int index)
{
return NULL;
}
static inline int of_parse_phandle_with_args(struct device_node *np,
const char *list_name,
const char *cells_name,
int index,
struct of_phandle_args *out_args)
{
return -ENOSYS;
}
static inline int of_parse_phandle_with_fixed_args(const struct device_node *np,
const char *list_name, int cells_count, int index,
struct of_phandle_args *out_args)
{
return -ENOSYS;
}
static inline int of_count_phandle_with_args(struct device_node *np,
const char *list_name,
const char *cells_name)
{
return -ENOSYS;
}
static inline int of_alias_get_id(struct device_node *np, const char *stem)
{
return -ENOSYS;
}
static inline int of_machine_is_compatible(const char *compat)
{
return 0;
}
static inline bool of_console_check(const struct device_node *dn, const char *name, int index)
{
return false;
}
static inline const __be32 *of_prop_next_u32(struct property *prop,
const __be32 *cur, u32 *pu)
{
return NULL;
}
static inline const char *of_prop_next_string(struct property *prop,
const char *cur)
{
return NULL;
}
#define of_match_ptr(_ptr) NULL
#define of_match_node(_matches, _node) NULL
#endif /* CONFIG_OF */
#if defined(CONFIG_OF) && defined(CONFIG_NUMA)
extern int of_node_to_nid(struct device_node *np);
#else
static inline int of_node_to_nid(struct device_node *device) { return 0; }
#endif
/**
* of_property_read_string_array() - Read an array of strings from a multiple
* strings property.
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @out_strs: output array of string pointers.
* @sz: number of array elements to read.
*
* Search for a property in a device tree node and retrieve a list of
* terminated string values (pointer to data, not a copy) in that property.
*
* If @out_strs is NULL, the number of strings in the property is returned.
*/
static inline int of_property_read_string_array(struct device_node *np,
const char *propname, const char **out_strs,
size_t sz)
{
return of_property_read_string_helper(np, propname, out_strs, sz, 0);
}
/**
* of_property_count_strings() - Find and return the number of strings from a
* multiple strings property.
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
*
* Search for a property in a device tree node and retrieve the number of null
* terminated string contain in it. Returns the number of strings on
* success, -EINVAL if the property does not exist, -ENODATA if property
* does not have a value, and -EILSEQ if the string is not null-terminated
* within the length of the property data.
*/
static inline int of_property_count_strings(struct device_node *np,
const char *propname)
{
return of_property_read_string_helper(np, propname, NULL, 0, 0);
}
/**
* of_property_read_string_index() - Find and read a string from a multiple
* strings property.
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
* @index: index of the string in the list of strings
* @out_string: pointer to null terminated return string, modified only if
* return value is 0.
*
* Search for a property in a device tree node and retrieve a null
* terminated string value (pointer to data, not a copy) in the list of strings
* contained in that property.
* Returns 0 on success, -EINVAL if the property does not exist, -ENODATA if
* property does not have a value, and -EILSEQ if the string is not
* null-terminated within the length of the property data.
*
* The out_string pointer is modified only if a valid string can be decoded.
*/
static inline int of_property_read_string_index(struct device_node *np,
const char *propname,
int index, const char **output)
{
int rc = of_property_read_string_helper(np, propname, output, 1, index);
return rc < 0 ? rc : 0;
}
/**
* of_property_read_bool - Findfrom a property
* @np: device node from which the property value is to be read.
* @propname: name of the property to be searched.
*
* Search for a property in a device node.
* Returns true if the property exist false otherwise.
*/
static inline bool of_property_read_bool(const struct device_node *np,
const char *propname)
{
struct property *prop = of_find_property(np, propname, NULL);
return prop ? true : false;
}
static inline int of_property_read_u8(const struct device_node *np,
const char *propname,
u8 *out_value)
{
return of_property_read_u8_array(np, propname, out_value, 1);
}
static inline int of_property_read_u16(const struct device_node *np,
const char *propname,
u16 *out_value)
{
return of_property_read_u16_array(np, propname, out_value, 1);
}
static inline int of_property_read_u32(const struct device_node *np,
const char *propname,
u32 *out_value)
{
return of_property_read_u32_array(np, propname, out_value, 1);
}
#define of_property_for_each_u32(np, propname, prop, p, u) \
for (prop = of_find_property(np, propname, NULL), \
p = of_prop_next_u32(prop, NULL, &u); \
p; \
p = of_prop_next_u32(prop, p, &u))
#define of_property_for_each_string(np, propname, prop, s) \
for (prop = of_find_property(np, propname, NULL), \
s = of_prop_next_string(prop, NULL); \
s; \
s = of_prop_next_string(prop, s))
#if defined(CONFIG_PROC_FS) && defined(CONFIG_PROC_DEVICETREE)
extern void proc_device_tree_add_node(struct device_node *, struct proc_dir_entry *);
extern void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop);
extern void proc_device_tree_remove_prop(struct proc_dir_entry *pde,
struct property *prop);
extern void proc_device_tree_update_prop(struct proc_dir_entry *pde,
struct property *newprop,
struct property *oldprop);
#endif
#endif /* _LINUX_OF_H */
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