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1#ifndef _LINUX_OF_H
2#define _LINUX_OF_H
3/*
4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
6 *
7 * Copyright (C) 1996-2005 Paul Mackerras.
8 *
9 * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp.
10 * Updates for SPARC64 by David S. Miller
11 * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp.
12 *
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
17 */
18#include <linux/types.h>
1977f032 19#include <linux/bitops.h>
6f192492 20#include <linux/kref.h>
283029d1 21#include <linux/mod_devicetable.h>
0d351c3e 22#include <linux/spinlock.h>
76c1ce78 23
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24#include <asm/byteorder.h>
25
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26#ifdef CONFIG_OF
27
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28typedef u32 phandle;
29typedef u32 ihandle;
30
31struct property {
32 char *name;
33 int length;
34 void *value;
35 struct property *next;
36 unsigned long _flags;
37 unsigned int unique_id;
38};
39
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40#if defined(CONFIG_SPARC)
41struct of_irq_controller;
42#endif
43
44struct device_node {
45 const char *name;
46 const char *type;
6016a363 47 phandle phandle;
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48 char *full_name;
49
50 struct property *properties;
51 struct property *deadprops; /* removed properties */
52 struct device_node *parent;
53 struct device_node *child;
54 struct device_node *sibling;
55 struct device_node *next; /* next device of same type */
56 struct device_node *allnext; /* next in list of all nodes */
57 struct proc_dir_entry *pde; /* this node's proc directory */
58 struct kref kref;
59 unsigned long _flags;
60 void *data;
61#if defined(CONFIG_SPARC)
62 char *path_component_name;
63 unsigned int unique_id;
64 struct of_irq_controller *irq_trans;
65#endif
66};
67
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68/* Pointer for first entry in chain of all nodes. */
69extern struct device_node *allnodes;
fc0bdae4 70extern struct device_node *of_chosen;
0d351c3e 71extern rwlock_t devtree_lock;
41f88009 72
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73static inline bool of_node_is_root(const struct device_node *node)
74{
75 return node && (node->parent == NULL);
76}
77
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78static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
79{
80 return test_bit(flag, &n->_flags);
81}
82
83static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
84{
85 set_bit(flag, &n->_flags);
86}
87
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88extern struct device_node *of_find_all_nodes(struct device_node *prev);
89
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90#if defined(CONFIG_SPARC)
91/* Dummy ref counting routines - to be implemented later */
92static inline struct device_node *of_node_get(struct device_node *node)
93{
94 return node;
95}
96static inline void of_node_put(struct device_node *node)
97{
98}
99
100#else
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101extern struct device_node *of_node_get(struct device_node *node);
102extern void of_node_put(struct device_node *node);
103#endif
104
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105/*
106 * OF address retreival & translation
107 */
108
109/* Helper to read a big number; size is in cells (not bytes) */
2e89e685 110static inline u64 of_read_number(const __be32 *cell, int size)
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111{
112 u64 r = 0;
113 while (size--)
2e89e685 114 r = (r << 32) | be32_to_cpu(*(cell++));
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115 return r;
116}
117
118/* Like of_read_number, but we want an unsigned long result */
2e89e685 119static inline unsigned long of_read_ulong(const __be32 *cell, int size)
b6caf2ad 120{
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121 /* toss away upper bits if unsigned long is smaller than u64 */
122 return of_read_number(cell, size);
b6caf2ad 123}
b6caf2ad 124
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125#include <asm/prom.h>
126
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127/* Default #address and #size cells. Allow arch asm/prom.h to override */
128#if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
129#define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
130#define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
131#endif
132
133/* Default string compare functions, Allow arch asm/prom.h to override */
134#if !defined(of_compat_cmp)
1976152f 135#define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
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136#define of_prop_cmp(s1, s2) strcmp((s1), (s2))
137#define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
138#endif
139
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140/* flag descriptions */
141#define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
142#define OF_DETACHED 2 /* node has been detached from the device tree */
143
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144#define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
145#define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
146
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147#define OF_BAD_ADDR ((u64)-1)
148
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149#ifndef of_node_to_nid
150static inline int of_node_to_nid(struct device_node *np) { return -1; }
151#define of_node_to_nid of_node_to_nid
152#endif
153
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154extern struct device_node *of_find_node_by_name(struct device_node *from,
155 const char *name);
156#define for_each_node_by_name(dn, name) \
157 for (dn = of_find_node_by_name(NULL, name); dn; \
158 dn = of_find_node_by_name(dn, name))
159extern struct device_node *of_find_node_by_type(struct device_node *from,
160 const char *type);
161#define for_each_node_by_type(dn, type) \
162 for (dn = of_find_node_by_type(NULL, type); dn; \
163 dn = of_find_node_by_type(dn, type))
164extern struct device_node *of_find_compatible_node(struct device_node *from,
165 const char *type, const char *compat);
166#define for_each_compatible_node(dn, type, compatible) \
167 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
168 dn = of_find_compatible_node(dn, type, compatible))
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169extern struct device_node *of_find_matching_node(struct device_node *from,
170 const struct of_device_id *matches);
171#define for_each_matching_node(dn, matches) \
172 for (dn = of_find_matching_node(NULL, matches); dn; \
173 dn = of_find_matching_node(dn, matches))
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174extern struct device_node *of_find_node_by_path(const char *path);
175extern struct device_node *of_find_node_by_phandle(phandle handle);
176extern struct device_node *of_get_parent(const struct device_node *node);
f4eb0107 177extern struct device_node *of_get_next_parent(struct device_node *node);
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178extern struct device_node *of_get_next_child(const struct device_node *node,
179 struct device_node *prev);
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180#define for_each_child_of_node(parent, child) \
181 for (child = of_get_next_child(parent, NULL); child != NULL; \
182 child = of_get_next_child(parent, child))
183
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184extern struct device_node *of_find_node_with_property(
185 struct device_node *from, const char *prop_name);
186#define for_each_node_with_property(dn, prop_name) \
187 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
188 dn = of_find_node_with_property(dn, prop_name))
189
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190extern struct property *of_find_property(const struct device_node *np,
191 const char *name,
192 int *lenp);
193extern int of_device_is_compatible(const struct device_node *device,
194 const char *);
834d97d4 195extern int of_device_is_available(const struct device_node *device);
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196extern const void *of_get_property(const struct device_node *node,
197 const char *name,
198 int *lenp);
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199extern int of_n_addr_cells(struct device_node *np);
200extern int of_n_size_cells(struct device_node *np);
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201extern const struct of_device_id *of_match_node(
202 const struct of_device_id *matches, const struct device_node *node);
3f07af49 203extern int of_modalias_node(struct device_node *node, char *modalias, int len);
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204extern struct device_node *of_parse_phandle(struct device_node *np,
205 const char *phandle_name,
206 int index);
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207extern int of_parse_phandles_with_args(struct device_node *np,
208 const char *list_name, const char *cells_name, int index,
209 struct device_node **out_node, const void **out_args);
76c1ce78 210
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211extern int of_machine_is_compatible(const char *compat);
212
213extern int prom_add_property(struct device_node* np, struct property* prop);
214extern int prom_remove_property(struct device_node *np, struct property *prop);
215extern int prom_update_property(struct device_node *np,
216 struct property *newprop,
217 struct property *oldprop);
218
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219#if defined(CONFIG_OF_DYNAMIC)
220/* For updating the device tree at runtime */
221extern void of_attach_node(struct device_node *);
222extern void of_detach_node(struct device_node *);
223#endif
224
9dfbf207 225#endif /* CONFIG_OF */
76c1ce78 226#endif /* _LINUX_OF_H */