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76c1ce78 SR |
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> |
e51130c0 | 20 | #include <linux/errno.h> |
6f192492 | 21 | #include <linux/kref.h> |
283029d1 | 22 | #include <linux/mod_devicetable.h> |
0d351c3e | 23 | #include <linux/spinlock.h> |
76c1ce78 | 24 | |
2e89e685 | 25 | #include <asm/byteorder.h> |
d0a99402 | 26 | #include <asm/errno.h> |
2e89e685 | 27 | |
731581e6 GL |
28 | typedef u32 phandle; |
29 | typedef u32 ihandle; | |
30 | ||
31 | struct 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 | ||
6f192492 GL |
40 | #if defined(CONFIG_SPARC) |
41 | struct of_irq_controller; | |
42 | #endif | |
43 | ||
44 | struct device_node { | |
45 | const char *name; | |
46 | const char *type; | |
6016a363 | 47 | phandle phandle; |
6f192492 GL |
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 | ||
15c9a0ac GL |
68 | #define MAX_PHANDLE_ARGS 8 |
69 | struct of_phandle_args { | |
70 | struct device_node *np; | |
71 | int args_count; | |
72 | uint32_t args[MAX_PHANDLE_ARGS]; | |
73 | }; | |
74 | ||
0f22dd39 GL |
75 | #ifdef CONFIG_OF_DYNAMIC |
76 | extern struct device_node *of_node_get(struct device_node *node); | |
77 | extern void of_node_put(struct device_node *node); | |
78 | #else /* CONFIG_OF_DYNAMIC */ | |
3ecdd051 RH |
79 | /* Dummy ref counting routines - to be implemented later */ |
80 | static inline struct device_node *of_node_get(struct device_node *node) | |
81 | { | |
82 | return node; | |
83 | } | |
0f22dd39 GL |
84 | static inline void of_node_put(struct device_node *node) { } |
85 | #endif /* !CONFIG_OF_DYNAMIC */ | |
3ecdd051 | 86 | |
c9e358df GL |
87 | #ifdef CONFIG_OF |
88 | ||
41f88009 GL |
89 | /* Pointer for first entry in chain of all nodes. */ |
90 | extern struct device_node *allnodes; | |
fc0bdae4 | 91 | extern struct device_node *of_chosen; |
611cad72 | 92 | extern struct device_node *of_aliases; |
0d351c3e | 93 | extern rwlock_t devtree_lock; |
41f88009 | 94 | |
3bcbaf6e SAS |
95 | static inline bool of_have_populated_dt(void) |
96 | { | |
97 | return allnodes != NULL; | |
98 | } | |
99 | ||
035ebefc AS |
100 | static inline bool of_node_is_root(const struct device_node *node) |
101 | { | |
102 | return node && (node->parent == NULL); | |
103 | } | |
104 | ||
50436312 GL |
105 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
106 | { | |
107 | return test_bit(flag, &n->_flags); | |
108 | } | |
109 | ||
110 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) | |
111 | { | |
112 | set_bit(flag, &n->_flags); | |
113 | } | |
114 | ||
e91edcf5 GL |
115 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
116 | ||
b6caf2ad | 117 | /* |
3d6b8828 | 118 | * OF address retrieval & translation |
b6caf2ad GL |
119 | */ |
120 | ||
121 | /* Helper to read a big number; size is in cells (not bytes) */ | |
2e89e685 | 122 | static inline u64 of_read_number(const __be32 *cell, int size) |
b6caf2ad GL |
123 | { |
124 | u64 r = 0; | |
125 | while (size--) | |
2e89e685 | 126 | r = (r << 32) | be32_to_cpu(*(cell++)); |
b6caf2ad GL |
127 | return r; |
128 | } | |
129 | ||
130 | /* Like of_read_number, but we want an unsigned long result */ | |
2e89e685 | 131 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
b6caf2ad | 132 | { |
2be09cb9 GL |
133 | /* toss away upper bits if unsigned long is smaller than u64 */ |
134 | return of_read_number(cell, size); | |
b6caf2ad | 135 | } |
b6caf2ad | 136 | |
76c1ce78 SR |
137 | #include <asm/prom.h> |
138 | ||
7c7b60cb GL |
139 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
140 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) | |
141 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 | |
142 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 | |
143 | #endif | |
144 | ||
145 | /* Default string compare functions, Allow arch asm/prom.h to override */ | |
146 | #if !defined(of_compat_cmp) | |
1976152f | 147 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
7c7b60cb GL |
148 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
149 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) | |
150 | #endif | |
151 | ||
76c1ce78 SR |
152 | /* flag descriptions */ |
153 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ | |
154 | #define OF_DETACHED 2 /* node has been detached from the device tree */ | |
155 | ||
61e955db GL |
156 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
157 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) | |
158 | ||
76c1ce78 SR |
159 | #define OF_BAD_ADDR ((u64)-1) |
160 | ||
559e2b7e GL |
161 | #ifndef of_node_to_nid |
162 | static inline int of_node_to_nid(struct device_node *np) { return -1; } | |
163 | #define of_node_to_nid of_node_to_nid | |
164 | #endif | |
165 | ||
76c1ce78 SR |
166 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
167 | const char *name); | |
168 | #define for_each_node_by_name(dn, name) \ | |
169 | for (dn = of_find_node_by_name(NULL, name); dn; \ | |
170 | dn = of_find_node_by_name(dn, name)) | |
171 | extern struct device_node *of_find_node_by_type(struct device_node *from, | |
172 | const char *type); | |
173 | #define for_each_node_by_type(dn, type) \ | |
174 | for (dn = of_find_node_by_type(NULL, type); dn; \ | |
175 | dn = of_find_node_by_type(dn, type)) | |
176 | extern struct device_node *of_find_compatible_node(struct device_node *from, | |
177 | const char *type, const char *compat); | |
178 | #define for_each_compatible_node(dn, type, compatible) \ | |
179 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ | |
180 | dn = of_find_compatible_node(dn, type, compatible)) | |
283029d1 GL |
181 | extern struct device_node *of_find_matching_node(struct device_node *from, |
182 | const struct of_device_id *matches); | |
183 | #define for_each_matching_node(dn, matches) \ | |
184 | for (dn = of_find_matching_node(NULL, matches); dn; \ | |
185 | dn = of_find_matching_node(dn, matches)) | |
76c1ce78 SR |
186 | extern struct device_node *of_find_node_by_path(const char *path); |
187 | extern struct device_node *of_find_node_by_phandle(phandle handle); | |
188 | extern struct device_node *of_get_parent(const struct device_node *node); | |
f4eb0107 | 189 | extern struct device_node *of_get_next_parent(struct device_node *node); |
76c1ce78 SR |
190 | extern struct device_node *of_get_next_child(const struct device_node *node, |
191 | struct device_node *prev); | |
aabc08dc ME |
192 | #define for_each_child_of_node(parent, child) \ |
193 | for (child = of_get_next_child(parent, NULL); child != NULL; \ | |
194 | child = of_get_next_child(parent, child)) | |
195 | ||
1e291b14 ME |
196 | extern struct device_node *of_find_node_with_property( |
197 | struct device_node *from, const char *prop_name); | |
198 | #define for_each_node_with_property(dn, prop_name) \ | |
199 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ | |
200 | dn = of_find_node_with_property(dn, prop_name)) | |
201 | ||
76c1ce78 SR |
202 | extern struct property *of_find_property(const struct device_node *np, |
203 | const char *name, | |
204 | int *lenp); | |
0e373639 | 205 | extern int of_property_read_u32_array(const struct device_node *np, |
aac285c6 | 206 | const char *propname, |
0e373639 RH |
207 | u32 *out_values, |
208 | size_t sz); | |
4cd7f7a3 JI |
209 | extern int of_property_read_u64(const struct device_node *np, |
210 | const char *propname, u64 *out_value); | |
0e373639 | 211 | |
aac285c6 JI |
212 | extern int of_property_read_string(struct device_node *np, |
213 | const char *propname, | |
214 | const char **out_string); | |
4fcd15a0 BC |
215 | extern int of_property_read_string_index(struct device_node *np, |
216 | const char *propname, | |
217 | int index, const char **output); | |
7aff0fe3 GL |
218 | extern int of_property_match_string(struct device_node *np, |
219 | const char *propname, | |
220 | const char *string); | |
4fcd15a0 BC |
221 | extern int of_property_count_strings(struct device_node *np, |
222 | const char *propname); | |
76c1ce78 SR |
223 | extern int of_device_is_compatible(const struct device_node *device, |
224 | const char *); | |
834d97d4 | 225 | extern int of_device_is_available(const struct device_node *device); |
76c1ce78 SR |
226 | extern const void *of_get_property(const struct device_node *node, |
227 | const char *name, | |
228 | int *lenp); | |
8af0da93 DA |
229 | #define for_each_property_of_node(dn, pp) \ |
230 | for (pp = dn->properties; pp != NULL; pp = pp->next) | |
611cad72 | 231 | |
76c1ce78 SR |
232 | extern int of_n_addr_cells(struct device_node *np); |
233 | extern int of_n_size_cells(struct device_node *np); | |
283029d1 GL |
234 | extern const struct of_device_id *of_match_node( |
235 | const struct of_device_id *matches, const struct device_node *node); | |
3f07af49 | 236 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
739649c5 GL |
237 | extern struct device_node *of_parse_phandle(struct device_node *np, |
238 | const char *phandle_name, | |
239 | int index); | |
15c9a0ac | 240 | extern int of_parse_phandle_with_args(struct device_node *np, |
64b60e09 | 241 | const char *list_name, const char *cells_name, int index, |
15c9a0ac | 242 | struct of_phandle_args *out_args); |
76c1ce78 | 243 | |
611cad72 SG |
244 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
245 | extern int of_alias_get_id(struct device_node *np, const char *stem); | |
246 | ||
21b082ec GL |
247 | extern int of_machine_is_compatible(const char *compat); |
248 | ||
249 | extern int prom_add_property(struct device_node* np, struct property* prop); | |
250 | extern int prom_remove_property(struct device_node *np, struct property *prop); | |
251 | extern int prom_update_property(struct device_node *np, | |
252 | struct property *newprop, | |
253 | struct property *oldprop); | |
254 | ||
fcdeb7fe GL |
255 | #if defined(CONFIG_OF_DYNAMIC) |
256 | /* For updating the device tree at runtime */ | |
257 | extern void of_attach_node(struct device_node *); | |
258 | extern void of_detach_node(struct device_node *); | |
259 | #endif | |
260 | ||
3a1e362e | 261 | #define of_match_ptr(_ptr) (_ptr) |
b98c0239 | 262 | #else /* CONFIG_OF */ |
3bcbaf6e SAS |
263 | |
264 | static inline bool of_have_populated_dt(void) | |
265 | { | |
266 | return false; | |
267 | } | |
268 | ||
aba3dfff SW |
269 | #define for_each_child_of_node(parent, child) \ |
270 | while (0) | |
271 | ||
36a0904e RN |
272 | static inline int of_device_is_compatible(const struct device_node *device, |
273 | const char *name) | |
274 | { | |
275 | return 0; | |
276 | } | |
277 | ||
aba3dfff SW |
278 | static inline struct property *of_find_property(const struct device_node *np, |
279 | const char *name, | |
280 | int *lenp) | |
281 | { | |
282 | return NULL; | |
283 | } | |
284 | ||
2261cc62 SG |
285 | static inline struct device_node *of_find_compatible_node( |
286 | struct device_node *from, | |
287 | const char *type, | |
288 | const char *compat) | |
289 | { | |
290 | return NULL; | |
291 | } | |
292 | ||
b98c0239 | 293 | static inline int of_property_read_u32_array(const struct device_node *np, |
aac285c6 JI |
294 | const char *propname, |
295 | u32 *out_values, size_t sz) | |
b98c0239 SG |
296 | { |
297 | return -ENOSYS; | |
298 | } | |
299 | ||
300 | static inline int of_property_read_string(struct device_node *np, | |
aac285c6 JI |
301 | const char *propname, |
302 | const char **out_string) | |
b98c0239 SG |
303 | { |
304 | return -ENOSYS; | |
305 | } | |
306 | ||
4fcd15a0 BC |
307 | static inline int of_property_read_string_index(struct device_node *np, |
308 | const char *propname, int index, | |
309 | const char **out_string) | |
310 | { | |
311 | return -ENOSYS; | |
312 | } | |
313 | ||
314 | static inline int of_property_count_strings(struct device_node *np, | |
315 | const char *propname) | |
316 | { | |
317 | return -ENOSYS; | |
318 | } | |
319 | ||
89272b8c SW |
320 | static inline const void *of_get_property(const struct device_node *node, |
321 | const char *name, | |
322 | int *lenp) | |
323 | { | |
324 | return NULL; | |
325 | } | |
326 | ||
4cd7f7a3 JI |
327 | static inline int of_property_read_u64(const struct device_node *np, |
328 | const char *propname, u64 *out_value) | |
329 | { | |
330 | return -ENOSYS; | |
331 | } | |
332 | ||
36a0904e RN |
333 | static inline struct device_node *of_parse_phandle(struct device_node *np, |
334 | const char *phandle_name, | |
335 | int index) | |
336 | { | |
337 | return NULL; | |
338 | } | |
339 | ||
ed5f886d NF |
340 | static inline int of_alias_get_id(struct device_node *np, const char *stem) |
341 | { | |
342 | return -ENOSYS; | |
343 | } | |
344 | ||
50e07f88 SW |
345 | static inline int of_machine_is_compatible(const char *compat) |
346 | { | |
347 | return 0; | |
348 | } | |
349 | ||
3a1e362e | 350 | #define of_match_ptr(_ptr) NULL |
5762c205 | 351 | #define of_match_node(_matches, _node) NULL |
9dfbf207 | 352 | #endif /* CONFIG_OF */ |
b98c0239 | 353 | |
fa4d34cc JCPV |
354 | /** |
355 | * of_property_read_bool - Findfrom a property | |
356 | * @np: device node from which the property value is to be read. | |
357 | * @propname: name of the property to be searched. | |
358 | * | |
359 | * Search for a property in a device node. | |
360 | * Returns true if the property exist false otherwise. | |
361 | */ | |
362 | static inline bool of_property_read_bool(const struct device_node *np, | |
363 | const char *propname) | |
364 | { | |
365 | struct property *prop = of_find_property(np, propname, NULL); | |
366 | ||
367 | return prop ? true : false; | |
368 | } | |
369 | ||
b98c0239 | 370 | static inline int of_property_read_u32(const struct device_node *np, |
aac285c6 | 371 | const char *propname, |
b98c0239 SG |
372 | u32 *out_value) |
373 | { | |
374 | return of_property_read_u32_array(np, propname, out_value, 1); | |
375 | } | |
376 | ||
76c1ce78 | 377 | #endif /* _LINUX_OF_H */ |