#ifndef _LINUX_OF_H #define _LINUX_OF_H /* * Definitions for talking to the Open Firmware PROM on * Power Macintosh and other computers. * * Copyright (C) 1996-2005 Paul Mackerras. * * Updates for PPC64 by Peter Bergner & David Engebretsen, IBM Corp. * Updates for SPARC64 by David S. Miller * Derived from PowerPC and Sparc prom.h files by Stephen Rothwell, IBM Corp. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/types.h> #include <linux/bitops.h> #include <linux/errno.h> #include <linux/kref.h> #include <linux/mod_devicetable.h> #include <linux/spinlock.h> #include <asm/byteorder.h> #include <asm/errno.h> typedef u32 phandle; typedef u32 ihandle; struct property { char *name; int length; void *value; struct property *next; unsigned long _flags; unsigned int unique_id; }; #if defined(CONFIG_SPARC) struct of_irq_controller; #endif struct device_node { const char *name; const char *type; phandle phandle; char *full_name; struct property *properties; struct property *deadprops; /* removed properties */ struct device_node *parent; struct device_node *child; struct device_node *sibling; struct device_node *next; /* next device of same type */ struct device_node *allnext; /* next in list of all nodes */ struct proc_dir_entry *pde; /* this node's proc directory */ struct kref kref; unsigned long _flags; void *data; #if defined(CONFIG_SPARC) char *path_component_name; unsigned int unique_id; struct of_irq_controller *irq_trans; #endif }; #define MAX_PHANDLE_ARGS 8 struct of_phandle_args { struct device_node *np; int args_count; uint32_t args[MAX_PHANDLE_ARGS]; }; #ifdef CONFIG_OF_DYNAMIC extern struct device_node *of_node_get(struct device_node *node); extern void of_node_put(struct device_node *node); #else /* CONFIG_OF_DYNAMIC */ /* Dummy ref counting routines - to be implemented later */ static inline struct device_node *of_node_get(struct device_node *node) { return node; } static inline void of_node_put(struct device_node *node) { } #endif /* !CONFIG_OF_DYNAMIC */ #ifdef CONFIG_OF /* Pointer for first entry in chain of all nodes. */ extern struct device_node *allnodes; extern struct device_node *of_chosen; extern struct device_node *of_aliases; extern rwlock_t devtree_lock; static inline bool of_have_populated_dt(void) { return allnodes != NULL; } static inline bool of_node_is_root(const struct device_node *node) { return node && (node->parent == NULL); } static inline int of_node_check_flag(struct device_node *n, unsigned long flag) { return test_bit(flag, &n->_flags); } static inline void of_node_set_flag(struct device_node *n, unsigned long flag) { set_bit(flag, &n->_flags); } extern struct device_node *of_find_all_nodes(struct device_node *prev); /* * OF address retrieval & translation */ /* Helper to read a big number; size is in cells (not bytes) */ static inline u64 of_read_number(const __be32 *cell, int size) { u64 r = 0; while (size--) r = (r << 32) | be32_to_cpu(*(cell++)); return r; } /* Like of_read_number, but we want an unsigned long result */ static inline unsigned long of_read_ulong(const __be32 *cell, int size) { /* toss away upper bits if unsigned long is smaller than u64 */ return of_read_number(cell, size); } #include <asm/prom.h> /* Default #address and #size cells. Allow arch asm/prom.h to override */ #if !defined(OF_ROOT_NODE_ADDR_CELLS_DEFAULT) #define OF_ROOT_NODE_ADDR_CELLS_DEFAULT 1 #define OF_ROOT_NODE_SIZE_CELLS_DEFAULT 1 #endif /* Default string compare functions, Allow arch asm/prom.h to override */ #if !defined(of_compat_cmp) #define of_compat_cmp(s1, s2, l) strcasecmp((s1), (s2)) #define of_prop_cmp(s1, s2) strcmp((s1), (s2)) #define of_node_cmp(s1, s2) strcasecmp((s1), (s2)) #endif /* flag descriptions */ #define OF_DYNAMIC 1 /* node and properties were allocated via kmalloc */ #define OF_DETACHED 2 /* node has been detached from the device tree */ #define OF_IS_DYNAMIC(x) test_bit(OF_DYNAMIC, &x->_flags) #define OF_MARK_DYNAMIC(x) set_bit(OF_DYNAMIC, &x->_flags) #define OF_BAD_ADDR ((u64)-1) #ifndef of_node_to_nid static inline int of_node_to_nid(struct device_node *np) { return -1; } #define of_node_to_nid of_node_to_nid #endif static inline const char* of_node_full_name(struct device_node *np) { return np ? np->full_name : "<no-node>"; } extern struct device_node *of_find_node_by_name(struct device_node *from, const char *name); #define for_each_node_by_name(dn, name) \ for (dn = of_find_node_by_name(NULL, name); dn; \ dn = of_find_node_by_name(dn, name)) extern struct device_node *of_find_node_by_type(struct device_node *from, const char *type); #define for_each_node_by_type(dn, type) \ for (dn = of_find_node_by_type(NULL, type); dn; \ dn = of_find_node_by_type(dn, type)) extern struct device_node *of_find_compatible_node(struct device_node *from, const char *type, const char *compat); #define for_each_compatible_node(dn, type, compatible) \ for (dn = of_find_compatible_node(NULL, type, compatible); dn; \ dn = of_find_compatible_node(dn, type, compatible)) extern struct device_node *of_find_matching_node(struct device_node *from, const struct of_device_id *matches); #define for_each_matching_node(dn, matches) \ for (dn = of_find_matching_node(NULL, matches); dn; \ dn = of_find_matching_node(dn, matches)) extern struct device_node *of_find_node_by_path(const char *path); extern struct device_node *of_find_node_by_phandle(phandle handle); extern struct device_node *of_get_parent(const struct device_node *node); extern struct device_node *of_get_next_parent(struct device_node *node); extern struct device_node *of_get_next_child(const struct device_node *node, struct device_node *prev); #define for_each_child_of_node(parent, child) \ for (child = of_get_next_child(parent, NULL); child != NULL; \ child = of_get_next_child(parent, child)) static inline int of_get_child_count(const struct device_node *np) { struct device_node *child; int num = 0; for_each_child_of_node(np, child) num++; return num; } extern struct device_node *of_find_node_with_property( struct device_node *from, const char *prop_name); #define for_each_node_with_property(dn, prop_name) \ for (dn = of_find_node_with_property(NULL, prop_name); dn; \ dn = of_find_node_with_property(dn, prop_name)) extern struct property *of_find_property(const struct device_node *np, const char *name, int *lenp); extern int of_property_read_u32_array(const struct device_node *np, const char *propname, u32 *out_values, size_t sz); extern int of_property_read_u64(const struct device_node *np, const char *propname, u64 *out_value); extern int of_property_read_string(struct device_node *np, const char *propname, const char **out_string); extern int of_property_read_string_index(struct device_node *np, const char *propname, int index, const char **output); extern int of_property_match_string(struct device_node *np, const char *propname, const char *string); extern int of_property_count_strings(struct device_node *np, const char *propname); extern int of_device_is_compatible(const struct device_node *device, const char *); extern int of_device_is_available(const struct device_node *device); extern const void *of_get_property(const struct device_node *node, const char *name, int *lenp); #define for_each_property_of_node(dn, pp) \ for (pp = dn->properties; pp != NULL; pp = pp->next) extern int of_n_addr_cells(struct device_node *np); extern int of_n_size_cells(struct device_node *np); extern const struct of_device_id *of_match_node( const struct of_device_id *matches, const struct device_node *node); extern int of_modalias_node(struct device_node *node, char *modalias, int len); extern struct device_node *of_parse_phandle(struct device_node *np, const char *phandle_name, int index); extern int of_parse_phandle_with_args(struct device_node *np, const char *list_name, const char *cells_name, int index, struct of_phandle_args *out_args); extern void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align)); extern int of_alias_get_id(struct device_node *np, const char *stem); extern int of_machine_is_compatible(const char *compat); extern int prom_add_property(struct device_node* np, struct property* prop); extern int prom_remove_property(struct device_node *np, struct property *prop); extern int prom_update_property(struct device_node *np, struct property *newprop); #if defined(CONFIG_OF_DYNAMIC) /* For updating the device tree at runtime */ extern void of_attach_node(struct device_node *); extern void of_detach_node(struct device_node *); #endif #define of_match_ptr(_ptr) (_ptr) /* * struct property *prop; * const __be32 *p; * u32 u; * * of_property_for_each_u32(np, "propname", prop, p, u) * printk("U32 value: %x\n", u); */ const __be32 *of_prop_next_u32(struct property *prop, const __be32 *cur, u32 *pu); #define of_property_for_each_u32(np, propname, prop, p, u) \ for (prop = of_find_property(np, propname, NULL), \ p = of_prop_next_u32(prop, NULL, &u); \ p; \ p = of_prop_next_u32(prop, p, &u)) /* * struct property *prop; * const char *s; * * of_property_for_each_string(np, "propname", prop, s) * printk("String value: %s\n", s); */ const char *of_prop_next_string(struct property *prop, const char *cur); #define of_property_for_each_string(np, propname, prop, s) \ for (prop = of_find_property(np, propname, NULL), \ s = of_prop_next_string(prop, NULL); \ s; \ s = of_prop_next_string(prop, s)) #else /* CONFIG_OF */ static inline const char* of_node_full_name(struct device_node *np) { return "<no-node>"; } static inline bool of_have_populated_dt(void) { return false; } #define for_each_child_of_node(parent, child) \ while (0) static inline int of_get_child_count(const struct device_node *np) { return 0; } static inline int of_device_is_compatible(const struct device_node *device, const char *name) { return 0; } static inline struct property *of_find_property(const struct device_node *np, const char *name, int *lenp) { return NULL; } static inline struct device_node *of_find_compatible_node( struct device_node *from, const char *type, const char *compat) { return NULL; } static inline int of_property_read_u32_array(const struct device_node *np, const char *propname, u32 *out_values, size_t sz) { return -ENOSYS; } static inline int of_property_read_string(struct device_node *np, const char *propname, const char **out_string) { return -ENOSYS; } static inline int of_property_read_string_index(struct device_node *np, const char *propname, int index, const char **out_string) { return -ENOSYS; } static inline int of_property_count_strings(struct device_node *np, const char *propname) { return -ENOSYS; } static inline const void *of_get_property(const struct device_node *node, const char *name, int *lenp) { return NULL; } static inline int of_property_read_u64(const struct device_node *np, const char *propname, u64 *out_value) { return -ENOSYS; } static inline int of_property_match_string(struct device_node *np, const char *propname, const char *string) { return -ENOSYS; } static inline struct device_node *of_parse_phandle(struct device_node *np, const char *phandle_name, int index) { return NULL; } static inline int of_parse_phandle_with_args(struct device_node *np, const char *list_name, const char *cells_name, int index, struct of_phandle_args *out_args) { return -ENOSYS; } static inline int of_alias_get_id(struct device_node *np, const char *stem) { return -ENOSYS; } static inline int of_machine_is_compatible(const char *compat) { return 0; } #define of_match_ptr(_ptr) NULL #define of_match_node(_matches, _node) NULL #define of_property_for_each_u32(np, propname, prop, p, u) \ while (0) #define of_property_for_each_string(np, propname, prop, s) \ while (0) #endif /* CONFIG_OF */ /** * of_property_read_bool - Findfrom a property * @np: device node from which the property value is to be read. * @propname: name of the property to be searched. * * Search for a property in a device node. * Returns true if the property exist false otherwise. */ static inline bool of_property_read_bool(const struct device_node *np, const char *propname) { struct property *prop = of_find_property(np, propname, NULL); return prop ? true : false; } static inline int of_property_read_u32(const struct device_node *np, const char *propname, u32 *out_value) { return of_property_read_u32_array(np, propname, out_value, 1); } #endif /* _LINUX_OF_H */