return (const char *)fdt + fdt_off_dt_strings(fdt) + stroffset;
}
+static int _fdt_string_eq(const void *fdt, int stroffset,
+ const char *s, int len)
+{
+ const char *p = fdt_string(fdt, stroffset);
+
+ return (strlen(p) == len) && (memcmp(p, s, len) == 0);
+}
+
int fdt_get_mem_rsv(const void *fdt, int n, uint64_t *address, uint64_t *size)
{
FDT_CHECK_HEADER(fdt);
return i;
}
+static int _nextprop(const void *fdt, int offset)
+{
+ uint32_t tag;
+ int nextoffset;
+
+ do {
+ tag = fdt_next_tag(fdt, offset, &nextoffset);
+
+ switch (tag) {
+ case FDT_END:
+ if (nextoffset >= 0)
+ return -FDT_ERR_BADSTRUCTURE;
+ else
+ return nextoffset;
+
+ case FDT_PROP:
+ return offset;
+ }
+ offset = nextoffset;
+ } while (tag == FDT_NOP);
+
+ return -FDT_ERR_NOTFOUND;
+}
+
int fdt_subnode_offset_namelen(const void *fdt, int offset,
const char *name, int namelen)
{
FDT_CHECK_HEADER(fdt);
- for (depth = 0, offset = fdt_next_node(fdt, offset, &depth);
- (offset >= 0) && (depth > 0);
- offset = fdt_next_node(fdt, offset, &depth)) {
- if (depth < 0)
- return -FDT_ERR_NOTFOUND;
- else if ((depth == 1)
- && _fdt_nodename_eq(fdt, offset, name, namelen))
+ for (depth = 0;
+ (offset >= 0) && (depth >= 0);
+ offset = fdt_next_node(fdt, offset, &depth))
+ if ((depth == 1)
+ && _fdt_nodename_eq(fdt, offset, name, namelen))
return offset;
- }
- if (offset < 0)
- return offset; /* error */
- else
+ if (depth < 0)
return -FDT_ERR_NOTFOUND;
+ return offset; /* error */
}
int fdt_subnode_offset(const void *fdt, int parentoffset,
FDT_CHECK_HEADER(fdt);
- if (*path != '/')
- return -FDT_ERR_BADPATH;
+ /* see if we have an alias */
+ if (*path != '/') {
+ const char *q = strchr(path, '/');
+
+ if (!q)
+ q = end;
+
+ p = fdt_get_alias_namelen(fdt, p, q - p);
+ if (!p)
+ return -FDT_ERR_BADPATH;
+ offset = fdt_path_offset(fdt, p);
+
+ p = q;
+ }
while (*p) {
const char *q;
return NULL;
}
-const struct fdt_property *fdt_get_property(const void *fdt,
- int nodeoffset,
- const char *name, int *lenp)
+int fdt_first_property_offset(const void *fdt, int nodeoffset)
+{
+ int offset;
+
+ if ((offset = _fdt_check_node_offset(fdt, nodeoffset)) < 0)
+ return offset;
+
+ return _nextprop(fdt, offset);
+}
+
+int fdt_next_property_offset(const void *fdt, int offset)
+{
+ if ((offset = _fdt_check_prop_offset(fdt, offset)) < 0)
+ return offset;
+
+ return _nextprop(fdt, offset);
+}
+
+const struct fdt_property *fdt_get_property_by_offset(const void *fdt,
+ int offset,
+ int *lenp)
{
- uint32_t tag;
- const struct fdt_property *prop;
- int namestroff;
- int offset, nextoffset;
int err;
+ const struct fdt_property *prop;
- if (((err = fdt_check_header(fdt)) != 0)
- || ((err = _fdt_check_node_offset(fdt, nodeoffset)) < 0))
- goto fail;
+ if ((err = _fdt_check_prop_offset(fdt, offset)) < 0) {
+ if (lenp)
+ *lenp = err;
+ return NULL;
+ }
- nextoffset = err;
- do {
- offset = nextoffset;
+ prop = _fdt_offset_ptr(fdt, offset);
- tag = fdt_next_tag(fdt, offset, &nextoffset);
- switch (tag) {
- case FDT_END:
- err = -FDT_ERR_TRUNCATED;
- goto fail;
+ if (lenp)
+ *lenp = fdt32_to_cpu(prop->len);
- case FDT_BEGIN_NODE:
- case FDT_END_NODE:
- case FDT_NOP:
- break;
+ return prop;
+}
- case FDT_PROP:
- err = -FDT_ERR_BADSTRUCTURE;
- prop = fdt_offset_ptr(fdt, offset, sizeof(*prop));
- if (! prop)
- goto fail;
- namestroff = fdt32_to_cpu(prop->nameoff);
- if (strcmp(fdt_string(fdt, namestroff), name) == 0) {
- /* Found it! */
- int len = fdt32_to_cpu(prop->len);
- prop = fdt_offset_ptr(fdt, offset,
- sizeof(*prop)+len);
- if (! prop)
- goto fail;
-
- if (lenp)
- *lenp = len;
-
- return prop;
- }
- break;
+const struct fdt_property *fdt_get_property_namelen(const void *fdt,
+ int offset,
+ const char *name,
+ int namelen, int *lenp)
+{
+ for (offset = fdt_first_property_offset(fdt, offset);
+ (offset >= 0);
+ (offset = fdt_next_property_offset(fdt, offset))) {
+ const struct fdt_property *prop;
- default:
- err = -FDT_ERR_BADSTRUCTURE;
- goto fail;
+ if (!(prop = fdt_get_property_by_offset(fdt, offset, lenp))) {
+ offset = -FDT_ERR_INTERNAL;
+ break;
}
- } while ((tag != FDT_BEGIN_NODE) && (tag != FDT_END_NODE));
+ if (_fdt_string_eq(fdt, fdt32_to_cpu(prop->nameoff),
+ name, namelen))
+ return prop;
+ }
- err = -FDT_ERR_NOTFOUND;
- fail:
if (lenp)
- *lenp = err;
+ *lenp = offset;
return NULL;
}
-const void *fdt_getprop(const void *fdt, int nodeoffset,
- const char *name, int *lenp)
+const struct fdt_property *fdt_get_property(const void *fdt,
+ int nodeoffset,
+ const char *name, int *lenp)
+{
+ return fdt_get_property_namelen(fdt, nodeoffset, name,
+ strlen(name), lenp);
+}
+
+const void *fdt_getprop_namelen(const void *fdt, int nodeoffset,
+ const char *name, int namelen, int *lenp)
{
const struct fdt_property *prop;
- prop = fdt_get_property(fdt, nodeoffset, name, lenp);
+ prop = fdt_get_property_namelen(fdt, nodeoffset, name, namelen, lenp);
if (! prop)
return NULL;
return prop->data;
}
+const void *fdt_getprop_by_offset(const void *fdt, int offset,
+ const char **namep, int *lenp)
+{
+ const struct fdt_property *prop;
+
+ prop = fdt_get_property_by_offset(fdt, offset, lenp);
+ if (!prop)
+ return NULL;
+ if (namep)
+ *namep = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
+ return prop->data;
+}
+
+const void *fdt_getprop(const void *fdt, int nodeoffset,
+ const char *name, int *lenp)
+{
+ return fdt_getprop_namelen(fdt, nodeoffset, name, strlen(name), lenp);
+}
+
uint32_t fdt_get_phandle(const void *fdt, int nodeoffset)
{
const uint32_t *php;
int len;
- php = fdt_getprop(fdt, nodeoffset, "linux,phandle", &len);
- if (!php || (len != sizeof(*php)))
- return 0;
+ /* FIXME: This is a bit sub-optimal, since we potentially scan
+ * over all the properties twice. */
+ php = fdt_getprop(fdt, nodeoffset, "phandle", &len);
+ if (!php || (len != sizeof(*php))) {
+ php = fdt_getprop(fdt, nodeoffset, "linux,phandle", &len);
+ if (!php || (len != sizeof(*php)))
+ return 0;
+ }
return fdt32_to_cpu(*php);
}
+const char *fdt_get_alias_namelen(const void *fdt,
+ const char *name, int namelen)
+{
+ int aliasoffset;
+
+ aliasoffset = fdt_path_offset(fdt, "/aliases");
+ if (aliasoffset < 0)
+ return NULL;
+
+ return fdt_getprop_namelen(fdt, aliasoffset, name, namelen, NULL);
+}
+
+const char *fdt_get_alias(const void *fdt, const char *name)
+{
+ return fdt_get_alias_namelen(fdt, name, strlen(name));
+}
+
int fdt_get_path(const void *fdt, int nodeoffset, char *buf, int buflen)
{
int pdepth = 0, p = 0;
for (offset = 0, depth = 0;
(offset >= 0) && (offset <= nodeoffset);
offset = fdt_next_node(fdt, offset, &depth)) {
- if (pdepth < depth)
- continue; /* overflowed buffer */
-
while (pdepth > depth) {
do {
p--;
pdepth--;
}
- name = fdt_get_name(fdt, offset, &namelen);
- if (!name)
- return namelen;
- if ((p + namelen + 1) <= buflen) {
- memcpy(buf + p, name, namelen);
- p += namelen;
- buf[p++] = '/';
- pdepth++;
+ if (pdepth >= depth) {
+ name = fdt_get_name(fdt, offset, &namelen);
+ if (!name)
+ return namelen;
+ if ((p + namelen + 1) <= buflen) {
+ memcpy(buf + p, name, namelen);
+ p += namelen;
+ buf[p++] = '/';
+ pdepth++;
+ }
}
if (offset == nodeoffset) {
if (p > 1) /* special case so that root path is "/", not "" */
p--;
buf[p] = '\0';
- return p;
+ return 0;
}
}
int fdt_node_offset_by_phandle(const void *fdt, uint32_t phandle)
{
+ int offset;
+
if ((phandle == 0) || (phandle == -1))
return -FDT_ERR_BADPHANDLE;
- phandle = cpu_to_fdt32(phandle);
- return fdt_node_offset_by_prop_value(fdt, -1, "linux,phandle",
- &phandle, sizeof(phandle));
+
+ FDT_CHECK_HEADER(fdt);
+
+ /* FIXME: The algorithm here is pretty horrible: we
+ * potentially scan each property of a node in
+ * fdt_get_phandle(), then if that didn't find what
+ * we want, we scan over them again making our way to the next
+ * node. Still it's the easiest to implement approach;
+ * performance can come later. */
+ for (offset = fdt_next_node(fdt, -1, NULL);
+ offset >= 0;
+ offset = fdt_next_node(fdt, offset, NULL)) {
+ if (fdt_get_phandle(fdt, offset) == phandle)
+ return offset;
+ }
+
+ return offset; /* error from fdt_next_node() */
}
-static int _stringlist_contains(const char *strlist, int listlen, const char *str)
+static int _fdt_stringlist_contains(const char *strlist, int listlen,
+ const char *str)
{
int len = strlen(str);
const char *p;
prop = fdt_getprop(fdt, nodeoffset, "compatible", &len);
if (!prop)
return len;
- if (_stringlist_contains(prop, len, compatible))
+ if (_fdt_stringlist_contains(prop, len, compatible))
return 0;
else
return 1;
projects / karo-tx-linux.git / blobdiff