4 * Definitions for talking to the Open Firmware PROM on
5 * Power Macintosh and other computers.
7 * Copyright (C) 1996-2005 Paul Mackerras.
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.
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.
18 #include <linux/types.h>
19 #include <linux/bitops.h>
20 #include <linux/errno.h>
21 #include <linux/kref.h>
22 #include <linux/mod_devicetable.h>
23 #include <linux/spinlock.h>
25 #include <asm/byteorder.h>
26 #include <asm/errno.h>
35 struct property *next;
37 unsigned int unique_id;
40 #if defined(CONFIG_SPARC)
41 struct of_irq_controller;
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 */
61 #if defined(CONFIG_EEH)
64 #if defined(CONFIG_SPARC)
65 char *path_component_name;
66 unsigned int unique_id;
67 struct of_irq_controller *irq_trans;
71 #define MAX_PHANDLE_ARGS 8
72 struct of_phandle_args {
73 struct device_node *np;
75 uint32_t args[MAX_PHANDLE_ARGS];
78 #if defined(CONFIG_EEH)
79 static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn)
85 #if defined(CONFIG_SPARC) || !defined(CONFIG_OF)
86 /* Dummy ref counting routines - to be implemented later */
87 static inline struct device_node *of_node_get(struct device_node *node)
91 static inline void of_node_put(struct device_node *node)
95 extern struct device_node *of_node_get(struct device_node *node);
96 extern void of_node_put(struct device_node *node);
101 /* Pointer for first entry in chain of all nodes. */
102 extern struct device_node *allnodes;
103 extern struct device_node *of_chosen;
104 extern struct device_node *of_aliases;
105 extern rwlock_t devtree_lock;
107 static inline bool of_have_populated_dt(void)
109 return allnodes != NULL;
112 static inline bool of_node_is_root(const struct device_node *node)
114 return node && (node->parent == NULL);
117 static inline int of_node_check_flag(struct device_node *n, unsigned long flag)
119 return test_bit(flag, &n->_flags);
122 static inline void of_node_set_flag(struct device_node *n, unsigned long flag)
124 set_bit(flag, &n->_flags);
127 extern struct device_node *of_find_all_nodes(struct device_node *prev);
130 * OF address retrieval & translation
133 /* Helper to read a big number; size is in cells (not bytes) */
134 static inline u64 of_read_number(const __be32 *cell, int size)
138 r = (r << 32) | be32_to_cpu(*(cell++));
142 /* Like of_read_number, but we want an unsigned long result */
143 static inline unsigned long of_read_ulong(const __be32 *cell, int size)
145 /* toss away upper bits if unsigned long is smaller than u64 */
146 return of_read_number(cell, size);
149 #include <asm/prom.h>
151 /* Default #address and #size cells. Allow arch asm/prom.h to override */
152 #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT)
153 #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1
154 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1
157 /* Default string compare functions, Allow arch asm/prom.h to override */
158 #if !defined(of_compat_cmp)
159 #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2))
160 #define of_prop_cmp(s1, s2) strcmp((s1), (s2))
161 #define of_node_cmp(s1, s2) strcasecmp((s1), (s2))
164 /* flag descriptions */
165 #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */
166 #define OF_DETACHED 2 /* node has been detached from the device tree */
168 #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags)
169 #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags)
171 #define OF_BAD_ADDR ((u64)-1)
173 #ifndef of_node_to_nid
174 static inline int of_node_to_nid(struct device_node *np) { return -1; }
175 #define of_node_to_nid of_node_to_nid
178 extern struct device_node *of_find_node_by_name(struct device_node *from,
180 #define for_each_node_by_name(dn, name) \
181 for (dn = of_find_node_by_name(NULL, name); dn; \
182 dn = of_find_node_by_name(dn, name))
183 extern struct device_node *of_find_node_by_type(struct device_node *from,
185 #define for_each_node_by_type(dn, type) \
186 for (dn = of_find_node_by_type(NULL, type); dn; \
187 dn = of_find_node_by_type(dn, type))
188 extern struct device_node *of_find_compatible_node(struct device_node *from,
189 const char *type, const char *compat);
190 #define for_each_compatible_node(dn, type, compatible) \
191 for (dn = of_find_compatible_node(NULL, type, compatible); dn; \
192 dn = of_find_compatible_node(dn, type, compatible))
193 extern struct device_node *of_find_matching_node(struct device_node *from,
194 const struct of_device_id *matches);
195 #define for_each_matching_node(dn, matches) \
196 for (dn = of_find_matching_node(NULL, matches); dn; \
197 dn = of_find_matching_node(dn, matches))
198 extern struct device_node *of_find_node_by_path(const char *path);
199 extern struct device_node *of_find_node_by_phandle(phandle handle);
200 extern struct device_node *of_get_parent(const struct device_node *node);
201 extern struct device_node *of_get_next_parent(struct device_node *node);
202 extern struct device_node *of_get_next_child(const struct device_node *node,
203 struct device_node *prev);
204 #define for_each_child_of_node(parent, child) \
205 for (child = of_get_next_child(parent, NULL); child != NULL; \
206 child = of_get_next_child(parent, child))
208 extern struct device_node *of_find_node_with_property(
209 struct device_node *from, const char *prop_name);
210 #define for_each_node_with_property(dn, prop_name) \
211 for (dn = of_find_node_with_property(NULL, prop_name); dn; \
212 dn = of_find_node_with_property(dn, prop_name))
214 extern struct property *of_find_property(const struct device_node *np,
217 extern int of_property_read_u32_array(const struct device_node *np,
218 const char *propname,
221 extern int of_property_read_u64(const struct device_node *np,
222 const char *propname, u64 *out_value);
224 extern int of_property_read_string(struct device_node *np,
225 const char *propname,
226 const char **out_string);
227 extern int of_property_read_string_index(struct device_node *np,
228 const char *propname,
229 int index, const char **output);
230 extern int of_property_count_strings(struct device_node *np,
231 const char *propname);
232 extern int of_device_is_compatible(const struct device_node *device,
234 extern int of_device_is_available(const struct device_node *device);
235 extern const void *of_get_property(const struct device_node *node,
238 #define for_each_property_of_node(dn, pp) \
239 for (pp = dn->properties; pp != NULL; pp = pp->next)
241 extern int of_n_addr_cells(struct device_node *np);
242 extern int of_n_size_cells(struct device_node *np);
243 extern const struct of_device_id *of_match_node(
244 const struct of_device_id *matches, const struct device_node *node);
245 extern int of_modalias_node(struct device_node *node, char *modalias, int len);
246 extern struct device_node *of_parse_phandle(struct device_node *np,
247 const char *phandle_name,
249 extern int of_parse_phandle_with_args(struct device_node *np,
250 const char *list_name, const char *cells_name, int index,
251 struct of_phandle_args *out_args);
253 extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align));
254 extern int of_alias_get_id(struct device_node *np, const char *stem);
256 extern int of_machine_is_compatible(const char *compat);
258 extern int prom_add_property(struct device_node* np, struct property* prop);
259 extern int prom_remove_property(struct device_node *np, struct property *prop);
260 extern int prom_update_property(struct device_node *np,
261 struct property *newprop,
262 struct property *oldprop);
264 #if defined(CONFIG_OF_DYNAMIC)
265 /* For updating the device tree at runtime */
266 extern void of_attach_node(struct device_node *);
267 extern void of_detach_node(struct device_node *);
270 #define of_match_ptr(_ptr) (_ptr)
271 #else /* CONFIG_OF */
273 static inline bool of_have_populated_dt(void)
278 #define for_each_child_of_node(parent, child) \
281 static inline int of_device_is_compatible(const struct device_node *device,
287 static inline struct property *of_find_property(const struct device_node *np,
294 static inline int of_property_read_u32_array(const struct device_node *np,
295 const char *propname,
296 u32 *out_values, size_t sz)
301 static inline int of_property_read_string(struct device_node *np,
302 const char *propname,
303 const char **out_string)
308 static inline int of_property_read_string_index(struct device_node *np,
309 const char *propname, int index,
310 const char **out_string)
315 static inline int of_property_count_strings(struct device_node *np,
316 const char *propname)
321 static inline const void *of_get_property(const struct device_node *node,
328 static inline int of_property_read_u64(const struct device_node *np,
329 const char *propname, u64 *out_value)
334 static inline struct device_node *of_parse_phandle(struct device_node *np,
335 const char *phandle_name,
341 static inline int of_alias_get_id(struct device_node *np, const char *stem)
346 static inline int of_machine_is_compatible(const char *compat)
351 #define of_match_ptr(_ptr) NULL
352 #define of_match_node(_matches, _node) NULL
353 #endif /* CONFIG_OF */
355 static inline int of_property_read_u32(const struct device_node *np,
356 const char *propname,
359 return of_property_read_u32_array(np, propname, out_value, 1);
362 #endif /* _LINUX_OF_H */