mirror of https://github.com/hak5/openwrt.git
116 lines
3.1 KiB
Diff
116 lines
3.1 KiB
Diff
From: John Crispin <blogic@openwrt.org>
|
|
Date: Sun, 27 Jul 2014 09:40:01 +0100
|
|
Subject: NET: add mtd-mac-address support to of_get_mac_address()
|
|
|
|
Many embedded devices have information such as mac addresses stored inside mtd
|
|
devices. This patch allows us to add a property inside a node describing a
|
|
network interface. The new property points at a mtd partition with an offset
|
|
where the mac address can be found.
|
|
|
|
Signed-off-by: John Crispin <blogic@openwrt.org>
|
|
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
|
---
|
|
drivers/of/of_net.c | 37 +++++++++++++++++++++++++++++++++++++
|
|
include/linux/of_net.h | 1 +
|
|
2 files changed, 38 insertions(+)
|
|
|
|
--- a/drivers/of/of_net.c
|
|
+++ b/drivers/of/of_net.c
|
|
@@ -10,6 +10,7 @@
|
|
#include <linux/of_net.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/export.h>
|
|
+#include <linux/mtd/mtd.h>
|
|
|
|
/**
|
|
* of_get_phy_mode - Get phy mode for given device_node
|
|
@@ -47,6 +48,66 @@ static const void *of_get_mac_addr(struc
|
|
return NULL;
|
|
}
|
|
|
|
+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;
|
|
+ struct mtd_info *mtd;
|
|
+ const char *part;
|
|
+ const __be32 *list;
|
|
+ phandle phandle;
|
|
+ u32 mac_inc = 0;
|
|
+ u8 mac[ETH_ALEN];
|
|
+
|
|
+ list = of_get_property(np, "mtd-mac-address", &size);
|
|
+ if (!list || (size != (2 * sizeof(*list))))
|
|
+ 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", &mac_inc))
|
|
+ mac[5] += mac_inc;
|
|
+
|
|
+ if (!is_valid_ether_addr(mac))
|
|
+ return NULL;
|
|
+
|
|
+ prop = kzalloc(sizeof(*prop), GFP_KERNEL);
|
|
+ if (!prop)
|
|
+ return NULL;
|
|
+
|
|
+ prop->name = "mac-address";
|
|
+ prop->length = ETH_ALEN;
|
|
+ prop->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL);
|
|
+ if (!prop->value || of_add_property(np, prop))
|
|
+ goto free;
|
|
+
|
|
+ return prop->value;
|
|
+free:
|
|
+ kfree(prop->value);
|
|
+ kfree(prop);
|
|
+#endif
|
|
+ return NULL;
|
|
+}
|
|
+
|
|
/**
|
|
* 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
|
|
@@ -64,6 +125,9 @@ static const void *of_get_mac_addr(struc
|
|
* addresses. Some older U-Boots only initialized 'local-mac-address'. In
|
|
* this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
|
|
* but is all zeros.
|
|
+ *
|
|
+ * If a mtd-mac-address property exists, try to fetch the MAC address from the
|
|
+ * specified mtd device, and store it as a 'mac-address' property
|
|
*/
|
|
const void *of_get_mac_address(struct device_node *np)
|
|
{
|
|
@@ -77,6 +141,10 @@ const void *of_get_mac_address(struct de
|
|
if (addr)
|
|
return addr;
|
|
|
|
- return of_get_mac_addr(np, "address");
|
|
+ addr = of_get_mac_addr(np, "address");
|
|
+ if (addr)
|
|
+ return addr;
|
|
+
|
|
+ return of_get_mac_address_mtd(np);
|
|
}
|
|
EXPORT_SYMBOL(of_get_mac_address);
|