1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2017 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <log.h>
9 #include <linux/libfdt.h>
10 #include <dm/of_access.h>
11 #include <dm/of_extra.h>
12 #include <dm/ofnode.h>
13
ofnode_read_fmap_entry(ofnode node,struct fmap_entry * entry)14 int ofnode_read_fmap_entry(ofnode node, struct fmap_entry *entry)
15 {
16 const char *prop;
17 ofnode subnode;
18
19 if (ofnode_read_u32(node, "image-pos", &entry->offset)) {
20 debug("Node '%s' has bad/missing 'image-pos' property\n",
21 ofnode_get_name(node));
22 return log_msg_ret("image-pos", -ENOENT);
23 }
24 if (ofnode_read_u32(node, "size", &entry->length)) {
25 debug("Node '%s' has bad/missing 'size' property\n",
26 ofnode_get_name(node));
27 return log_msg_ret("size", -ENOENT);
28 }
29 entry->used = ofnode_read_s32_default(node, "used", entry->length);
30 prop = ofnode_read_string(node, "compress");
31 if (prop) {
32 if (!strcmp(prop, "lz4"))
33 entry->compress_algo = FMAP_COMPRESS_LZ4;
34 else if (!strcmp(prop, "lzma"))
35 entry->compress_algo = FMAP_COMPRESS_LZMA;
36 else
37 return log_msg_ret("compression algo", -EINVAL);
38 } else {
39 entry->compress_algo = FMAP_COMPRESS_NONE;
40 }
41 entry->unc_length = ofnode_read_s32_default(node, "uncomp-size",
42 entry->length);
43 subnode = ofnode_find_subnode(node, "hash");
44 if (ofnode_valid(subnode)) {
45 prop = ofnode_read_prop(subnode, "value", &entry->hash_size);
46
47 /* Assume it is sha256 */
48 entry->hash_algo = prop ? FMAP_HASH_SHA256 : FMAP_HASH_NONE;
49 entry->hash = (uint8_t *)prop;
50 }
51
52 return 0;
53 }
54
ofnode_decode_region(ofnode node,const char * prop_name,fdt_addr_t * basep,fdt_size_t * sizep)55 int ofnode_decode_region(ofnode node, const char *prop_name, fdt_addr_t *basep,
56 fdt_size_t *sizep)
57 {
58 const fdt_addr_t *cell;
59 int len;
60
61 debug("%s: %s: %s\n", __func__, ofnode_get_name(node), prop_name);
62 cell = ofnode_get_property(node, prop_name, &len);
63 if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
64 debug("cell=%p, len=%d\n", cell, len);
65 return -1;
66 }
67
68 *basep = fdt_addr_to_cpu(*cell);
69 *sizep = fdt_size_to_cpu(cell[1]);
70 debug("%s: base=%08lx, size=%lx\n", __func__, (ulong)*basep,
71 (ulong)*sizep);
72
73 return 0;
74 }
75
ofnode_decode_memory_region(ofnode config_node,const char * mem_type,const char * suffix,fdt_addr_t * basep,fdt_size_t * sizep)76 int ofnode_decode_memory_region(ofnode config_node, const char *mem_type,
77 const char *suffix, fdt_addr_t *basep,
78 fdt_size_t *sizep)
79 {
80 char prop_name[50];
81 const char *mem;
82 fdt_size_t size, offset_size;
83 fdt_addr_t base, offset;
84 ofnode node;
85
86 if (!ofnode_valid(config_node)) {
87 config_node = ofnode_path("/config");
88 if (!ofnode_valid(config_node)) {
89 debug("%s: Cannot find /config node\n", __func__);
90 return -ENOENT;
91 }
92 }
93 if (!suffix)
94 suffix = "";
95
96 snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
97 suffix);
98 mem = ofnode_read_string(config_node, prop_name);
99 if (!mem) {
100 debug("%s: No memory type for '%s', using /memory\n", __func__,
101 prop_name);
102 mem = "/memory";
103 }
104
105 node = ofnode_path(mem);
106 if (!ofnode_valid(node)) {
107 debug("%s: Failed to find node '%s'\n", __func__, mem);
108 return -ENOENT;
109 }
110
111 /*
112 * Not strictly correct - the memory may have multiple banks. We just
113 * use the first
114 */
115 if (ofnode_decode_region(node, "reg", &base, &size)) {
116 debug("%s: Failed to decode memory region %s\n", __func__,
117 mem);
118 return -EINVAL;
119 }
120
121 snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
122 suffix);
123 if (ofnode_decode_region(config_node, prop_name, &offset,
124 &offset_size)) {
125 debug("%s: Failed to decode memory region '%s'\n", __func__,
126 prop_name);
127 return -EINVAL;
128 }
129
130 *basep = base + offset;
131 *sizep = offset_size;
132
133 return 0;
134 }
135
ofnode_phy_is_fixed_link(ofnode eth_node,ofnode * phy_node)136 bool ofnode_phy_is_fixed_link(ofnode eth_node, ofnode *phy_node)
137 {
138 ofnode node, subnode;
139 int len;
140
141 subnode = ofnode_find_subnode(eth_node, "fixed-link");
142 if (ofnode_valid(subnode)) {
143 /* new binding */
144 node = subnode;
145 } else if (ofnode_get_property(eth_node, "fixed-link", &len) &&
146 len == (5 * sizeof(__be32))) {
147 /* old binding */
148 node = eth_node;
149 } else {
150 return false;
151 }
152
153 if (phy_node)
154 *phy_node = node;
155
156 return true;
157 }
158