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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 JK |
25 | #include <asm/byteorder.h> |
26 | ||
731581e6 GL |
27 | typedef u32 phandle; |
28 | typedef u32 ihandle; | |
29 | ||
30 | struct property { | |
31 | char *name; | |
32 | int length; | |
33 | void *value; | |
34 | struct property *next; | |
35 | unsigned long _flags; | |
36 | unsigned int unique_id; | |
37 | }; | |
38 | ||
6f192492 GL |
39 | #if defined(CONFIG_SPARC) |
40 | struct of_irq_controller; | |
41 | #endif | |
42 | ||
43 | struct device_node { | |
44 | const char *name; | |
45 | const char *type; | |
6016a363 | 46 | phandle phandle; |
6f192492 GL |
47 | char *full_name; |
48 | ||
49 | struct property *properties; | |
50 | struct property *deadprops; /* removed properties */ | |
51 | struct device_node *parent; | |
52 | struct device_node *child; | |
53 | struct device_node *sibling; | |
54 | struct device_node *next; /* next device of same type */ | |
55 | struct device_node *allnext; /* next in list of all nodes */ | |
56 | struct proc_dir_entry *pde; /* this node's proc directory */ | |
57 | struct kref kref; | |
58 | unsigned long _flags; | |
59 | void *data; | |
60 | #if defined(CONFIG_SPARC) | |
61 | char *path_component_name; | |
62 | unsigned int unique_id; | |
63 | struct of_irq_controller *irq_trans; | |
64 | #endif | |
65 | }; | |
66 | ||
c9e358df GL |
67 | #ifdef CONFIG_OF |
68 | ||
41f88009 GL |
69 | /* Pointer for first entry in chain of all nodes. */ |
70 | extern struct device_node *allnodes; | |
fc0bdae4 | 71 | extern struct device_node *of_chosen; |
611cad72 | 72 | extern struct device_node *of_aliases; |
0d351c3e | 73 | extern rwlock_t devtree_lock; |
41f88009 | 74 | |
3bcbaf6e SAS |
75 | static inline bool of_have_populated_dt(void) |
76 | { | |
77 | return allnodes != NULL; | |
78 | } | |
79 | ||
035ebefc AS |
80 | static inline bool of_node_is_root(const struct device_node *node) |
81 | { | |
82 | return node && (node->parent == NULL); | |
83 | } | |
84 | ||
50436312 GL |
85 | static inline int of_node_check_flag(struct device_node *n, unsigned long flag) |
86 | { | |
87 | return test_bit(flag, &n->_flags); | |
88 | } | |
89 | ||
90 | static inline void of_node_set_flag(struct device_node *n, unsigned long flag) | |
91 | { | |
92 | set_bit(flag, &n->_flags); | |
93 | } | |
94 | ||
e91edcf5 GL |
95 | extern struct device_node *of_find_all_nodes(struct device_node *prev); |
96 | ||
526b5b3e GL |
97 | #if defined(CONFIG_SPARC) |
98 | /* Dummy ref counting routines - to be implemented later */ | |
99 | static inline struct device_node *of_node_get(struct device_node *node) | |
100 | { | |
101 | return node; | |
102 | } | |
103 | static inline void of_node_put(struct device_node *node) | |
104 | { | |
105 | } | |
106 | ||
107 | #else | |
526b5b3e GL |
108 | extern struct device_node *of_node_get(struct device_node *node); |
109 | extern void of_node_put(struct device_node *node); | |
110 | #endif | |
111 | ||
b6caf2ad | 112 | /* |
3d6b8828 | 113 | * OF address retrieval & translation |
b6caf2ad GL |
114 | */ |
115 | ||
116 | /* Helper to read a big number; size is in cells (not bytes) */ | |
2e89e685 | 117 | static inline u64 of_read_number(const __be32 *cell, int size) |
b6caf2ad GL |
118 | { |
119 | u64 r = 0; | |
120 | while (size--) | |
2e89e685 | 121 | r = (r << 32) | be32_to_cpu(*(cell++)); |
b6caf2ad GL |
122 | return r; |
123 | } | |
124 | ||
125 | /* Like of_read_number, but we want an unsigned long result */ | |
2e89e685 | 126 | static inline unsigned long of_read_ulong(const __be32 *cell, int size) |
b6caf2ad | 127 | { |
2be09cb9 GL |
128 | /* toss away upper bits if unsigned long is smaller than u64 */ |
129 | return of_read_number(cell, size); | |
b6caf2ad | 130 | } |
b6caf2ad | 131 | |
76c1ce78 SR |
132 | #include <asm/prom.h> |
133 | ||
7c7b60cb GL |
134 | /* Default #address and #size cells. Allow arch asm/prom.h to override */ |
135 | #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) | |
136 | #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 | |
137 | #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 | |
138 | #endif | |
139 | ||
140 | /* Default string compare functions, Allow arch asm/prom.h to override */ | |
141 | #if !defined(of_compat_cmp) | |
1976152f | 142 | #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) |
7c7b60cb GL |
143 | #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) |
144 | #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) | |
145 | #endif | |
146 | ||
76c1ce78 SR |
147 | /* flag descriptions */ |
148 | #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ | |
149 | #define OF_DETACHED 2 /* node has been detached from the device tree */ | |
150 | ||
61e955db GL |
151 | #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) |
152 | #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) | |
153 | ||
76c1ce78 SR |
154 | #define OF_BAD_ADDR ((u64)-1) |
155 | ||
559e2b7e GL |
156 | #ifndef of_node_to_nid |
157 | static inline int of_node_to_nid(struct device_node *np) { return -1; } | |
158 | #define of_node_to_nid of_node_to_nid | |
159 | #endif | |
160 | ||
76c1ce78 SR |
161 | extern struct device_node *of_find_node_by_name(struct device_node *from, |
162 | const char *name); | |
163 | #define for_each_node_by_name(dn, name) \ | |
164 | for (dn = of_find_node_by_name(NULL, name); dn; \ | |
165 | dn = of_find_node_by_name(dn, name)) | |
166 | extern struct device_node *of_find_node_by_type(struct device_node *from, | |
167 | const char *type); | |
168 | #define for_each_node_by_type(dn, type) \ | |
169 | for (dn = of_find_node_by_type(NULL, type); dn; \ | |
170 | dn = of_find_node_by_type(dn, type)) | |
171 | extern struct device_node *of_find_compatible_node(struct device_node *from, | |
172 | const char *type, const char *compat); | |
173 | #define for_each_compatible_node(dn, type, compatible) \ | |
174 | for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ | |
175 | dn = of_find_compatible_node(dn, type, compatible)) | |
283029d1 GL |
176 | extern struct device_node *of_find_matching_node(struct device_node *from, |
177 | const struct of_device_id *matches); | |
178 | #define for_each_matching_node(dn, matches) \ | |
179 | for (dn = of_find_matching_node(NULL, matches); dn; \ | |
180 | dn = of_find_matching_node(dn, matches)) | |
76c1ce78 SR |
181 | extern struct device_node *of_find_node_by_path(const char *path); |
182 | extern struct device_node *of_find_node_by_phandle(phandle handle); | |
183 | extern struct device_node *of_get_parent(const struct device_node *node); | |
f4eb0107 | 184 | extern struct device_node *of_get_next_parent(struct device_node *node); |
76c1ce78 SR |
185 | extern struct device_node *of_get_next_child(const struct device_node *node, |
186 | struct device_node *prev); | |
aabc08dc ME |
187 | #define for_each_child_of_node(parent, child) \ |
188 | for (child = of_get_next_child(parent, NULL); child != NULL; \ | |
189 | child = of_get_next_child(parent, child)) | |
190 | ||
1e291b14 ME |
191 | extern struct device_node *of_find_node_with_property( |
192 | struct device_node *from, const char *prop_name); | |
193 | #define for_each_node_with_property(dn, prop_name) \ | |
194 | for (dn = of_find_node_with_property(NULL, prop_name); dn; \ | |
195 | dn = of_find_node_with_property(dn, prop_name)) | |
196 | ||
76c1ce78 SR |
197 | extern struct property *of_find_property(const struct device_node *np, |
198 | const char *name, | |
199 | int *lenp); | |
0e373639 | 200 | extern int of_property_read_u32_array(const struct device_node *np, |
aac285c6 | 201 | const char *propname, |
0e373639 RH |
202 | u32 *out_values, |
203 | size_t sz); | |
4cd7f7a3 JI |
204 | extern int of_property_read_u64(const struct device_node *np, |
205 | const char *propname, u64 *out_value); | |
0e373639 | 206 | |
aac285c6 JI |
207 | extern int of_property_read_string(struct device_node *np, |
208 | const char *propname, | |
209 | const char **out_string); | |
76c1ce78 SR |
210 | extern int of_device_is_compatible(const struct device_node *device, |
211 | const char *); | |
834d97d4 | 212 | extern int of_device_is_available(const struct device_node *device); |
76c1ce78 SR |
213 | extern const void *of_get_property(const struct device_node *node, |
214 | const char *name, | |
215 | int *lenp); | |
611cad72 SG |
216 | #define for_each_property(pp, properties) \ |
217 | for (pp = properties; pp != NULL; pp = pp->next) | |
218 | ||
76c1ce78 SR |
219 | extern int of_n_addr_cells(struct device_node *np); |
220 | extern int of_n_size_cells(struct device_node *np); | |
283029d1 GL |
221 | extern const struct of_device_id *of_match_node( |
222 | const struct of_device_id *matches, const struct device_node *node); | |
3f07af49 | 223 | extern int of_modalias_node(struct device_node *node, char *modalias, int len); |
739649c5 GL |
224 | extern struct device_node *of_parse_phandle(struct device_node *np, |
225 | const char *phandle_name, | |
226 | int index); | |
64b60e09 AV |
227 | extern int of_parse_phandles_with_args(struct device_node *np, |
228 | const char *list_name, const char *cells_name, int index, | |
229 | struct device_node **out_node, const void **out_args); | |
76c1ce78 | 230 | |
611cad72 SG |
231 | extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); |
232 | extern int of_alias_get_id(struct device_node *np, const char *stem); | |
233 | ||
21b082ec GL |
234 | extern int of_machine_is_compatible(const char *compat); |
235 | ||
236 | extern int prom_add_property(struct device_node* np, struct property* prop); | |
237 | extern int prom_remove_property(struct device_node *np, struct property *prop); | |
238 | extern int prom_update_property(struct device_node *np, | |
239 | struct property *newprop, | |
240 | struct property *oldprop); | |
241 | ||
fcdeb7fe GL |
242 | #if defined(CONFIG_OF_DYNAMIC) |
243 | /* For updating the device tree at runtime */ | |
244 | extern void of_attach_node(struct device_node *); | |
245 | extern void of_detach_node(struct device_node *); | |
246 | #endif | |
247 | ||
3a1e362e | 248 | #define of_match_ptr(_ptr) (_ptr) |
b98c0239 | 249 | #else /* CONFIG_OF */ |
3bcbaf6e SAS |
250 | |
251 | static inline bool of_have_populated_dt(void) | |
252 | { | |
253 | return false; | |
254 | } | |
255 | ||
aba3dfff SW |
256 | #define for_each_child_of_node(parent, child) \ |
257 | while (0) | |
258 | ||
36a0904e RN |
259 | static inline int of_device_is_compatible(const struct device_node *device, |
260 | const char *name) | |
261 | { | |
262 | return 0; | |
263 | } | |
264 | ||
aba3dfff SW |
265 | static inline struct property *of_find_property(const struct device_node *np, |
266 | const char *name, | |
267 | int *lenp) | |
268 | { | |
269 | return NULL; | |
270 | } | |
271 | ||
b98c0239 | 272 | static inline int of_property_read_u32_array(const struct device_node *np, |
aac285c6 JI |
273 | const char *propname, |
274 | u32 *out_values, size_t sz) | |
b98c0239 SG |
275 | { |
276 | return -ENOSYS; | |
277 | } | |
278 | ||
279 | static inline int of_property_read_string(struct device_node *np, | |
aac285c6 JI |
280 | const char *propname, |
281 | const char **out_string) | |
b98c0239 SG |
282 | { |
283 | return -ENOSYS; | |
284 | } | |
285 | ||
89272b8c SW |
286 | static inline const void *of_get_property(const struct device_node *node, |
287 | const char *name, | |
288 | int *lenp) | |
289 | { | |
290 | return NULL; | |
291 | } | |
292 | ||
4cd7f7a3 JI |
293 | static inline int of_property_read_u64(const struct device_node *np, |
294 | const char *propname, u64 *out_value) | |
295 | { | |
296 | return -ENOSYS; | |
297 | } | |
298 | ||
36a0904e RN |
299 | static inline struct device_node *of_parse_phandle(struct device_node *np, |
300 | const char *phandle_name, | |
301 | int index) | |
302 | { | |
303 | return NULL; | |
304 | } | |
305 | ||
3a1e362e | 306 | #define of_match_ptr(_ptr) NULL |
5762c205 | 307 | #define of_match_node(_matches, _node) NULL |
9dfbf207 | 308 | #endif /* CONFIG_OF */ |
b98c0239 SG |
309 | |
310 | static inline int of_property_read_u32(const struct device_node *np, | |
aac285c6 | 311 | const char *propname, |
b98c0239 SG |
312 | u32 *out_value) |
313 | { | |
314 | return of_property_read_u32_array(np, propname, out_value, 1); | |
315 | } | |
316 | ||
76c1ce78 | 317 | #endif /* _LINUX_OF_H */ |