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