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