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generic: support mtd-mac-address-ascii

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It supports formats of both 001122334455 and 00:11:22:33:44:55

Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
This commit is contained in:
Yousong Zhou 2019-06-08 02:51:10 +00:00 committed by AmadeusGhost
parent 9e3a1b33a0
commit 522db861ae
1 changed files with 83 additions and 24 deletions
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107
target/linux/generic/pending-5.4/681-NET-add-of_get_mac_address_mtd.patch
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@ -32,17 +32,67 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
{
struct property *pp = of_find_property(np, name, NULL);
@@ -72,6 +73,79 @@ static const void *of_get_mac_addr_nvmem
@@ -72,6 +73,138 @@ static const void *of_get_mac_addr_nvmem
return mac;
}
+typedef int(*mtd_mac_address_read)(struct mtd_info *mtd, loff_t from, u_char *buf);
+
+static int read_mtd_mac_address(struct mtd_info *mtd, loff_t from, u_char *mac)
+{
+ size_t retlen;
+
+ return mtd_read(mtd, from, 6, &retlen, mac);
+}
+
+static int read_mtd_mac_address_ascii(struct mtd_info *mtd, loff_t from, u_char *mac)
+{
+ size_t retlen;
+ char buf[17];
+
+ if (mtd_read(mtd, from, 12, &retlen, buf)) {
+ return -1;
+ }
+ if (sscanf(buf, "%2hhx%2hhx%2hhx%2hhx%2hhx%2hhx",
+ &mac[0], &mac[1], &mac[2], &mac[3],
+ &mac[4], &mac[5]) == 6) {
+ if (mac[0] == '\0' && mac[1] == '\0') { /* First 2 bytes are zero, probably a bug. Trying to re-read */
+ buf[4] = '\0'; /* Make it null-terminated */
+ if (sscanf(buf, "%4hx", mac) == 1)
+ *(uint16_t*)mac = htons(*(uint16_t*)mac);
+ }
+ return 0;
+ }
+ if (mtd_read(mtd, from+12, 5, &retlen, buf+12)) {
+ return -1;
+ }
+ if (sscanf(buf, "%2hhx:%2hhx:%2hhx:%2hhx:%2hhx:%2hhx",
+ &mac[0], &mac[1], &mac[2], &mac[3],
+ &mac[4], &mac[5]) == 6) {
+ return 0;
+ }
+ return -1;
+}
+
+static struct mtd_mac_address_property {
+ char *name;
+ mtd_mac_address_read read;
+} mtd_mac_address_properties[] = {
+ {
+ .name = "mtd-mac-address",
+ .read = read_mtd_mac_address,
+ }, {
+ .name = "mtd-mac-address-ascii",
+ .read = read_mtd_mac_address_ascii,
+ },
+};
+
+static const void *of_get_mac_address_mtd(struct device_node *np)
+{
+#ifdef CONFIG_MTD
+ struct device_node *mtd_np = NULL;
+ struct property *prop;
+ size_t retlen;
+ int size, ret;
+ int size, ret = -1;
+ struct mtd_info *mtd;
+ const char *part;
+ const __be32 *list;
@ -51,28 +101,37 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ u8 mac[ETH_ALEN];
+ void *addr;
+ u32 inc_idx;
+ int i;
+
+ list = of_get_property(np, "mtd-mac-address", &size);
+ if (!list || (size != (2 * sizeof(*list))))
+ for (i = 0; i < ARRAY_SIZE(mtd_mac_address_properties); i++) {
+ list = of_get_property(np, mtd_mac_address_properties[i].name, &size);
+ if (!list || (size != (2 * sizeof(*list))))
+ continue;
+
+ phandle = be32_to_cpup(list++);
+ if (phandle)
+ mtd_np = of_find_node_by_phandle(phandle);
+
+ if (!mtd_np)
+ continue;
+
+ part = of_get_property(mtd_np, "label", NULL);
+ if (!part)
+ part = mtd_np->name;
+
+ mtd = get_mtd_device_nm(part);
+ if (IS_ERR(mtd))
+ continue;
+
+ ret = mtd_mac_address_properties[i].read(mtd, be32_to_cpup(list), mac);
+ put_mtd_device(mtd);
+ if (!ret) {
+ break;
+ }
+ }
+ if (ret) {
+ return NULL;
+
+ phandle = be32_to_cpup(list++);
+ if (phandle)
+ mtd_np = of_find_node_by_phandle(phandle);
+
+ if (!mtd_np)
+ return NULL;
+
+ part = of_get_property(mtd_np, "label", NULL);
+ if (!part)
+ part = mtd_np->name;
+
+ mtd = get_mtd_device_nm(part);
+ if (IS_ERR(mtd))
+ return NULL;
+
+ ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac);
+ put_mtd_device(mtd);
+ }
+
+ if (of_property_read_u32(np, "mtd-mac-address-increment-byte", &inc_idx))
+ inc_idx = 5;
@ -112,7 +171,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
/**
* Search the device tree for the best MAC address to use. 'mac-address' is
* checked first, because that is supposed to contain to "most recent" MAC
@@ -92,12 +166,20 @@ static const void *of_get_mac_addr_nvmem
@@ -92,12 +225,20 @@ static const void *of_get_mac_addr_nvmem
* this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
* but is all zeros.
*