The built-in SMSC 95xx chip doesn't know its own MAC address. Instead,
we must query it from the VC firmware; it's probably encoded in fuses
on the BCM2835.
Signed-off-by: Stephen Warren <swar...@wwwdotorg.org>
---
arch/arm/include/asm/arch-bcm2835/mbox.h | 14 ++++++++++++++
board/raspberrypi/rpi_b/rpi_b.c | 26 ++++++++++++++++++++++++++
include/configs/rpi_b.h | 1 +
3 files changed, 41 insertions(+)
diff --git a/arch/arm/include/asm/arch-bcm2835/mbox.h
b/arch/arm/include/asm/arch-bcm2835/mbox.h
index dded857..61f427d 100644
--- a/arch/arm/include/asm/arch-bcm2835/mbox.h
+++ b/arch/arm/include/asm/arch-bcm2835/mbox.h
@@ -119,6 +119,20 @@ struct bcm2835_mbox_tag_hdr {
* };
*/
+#define BCM2835_MBOX_TAG_GET_MAC_ADDRESS 0x00010003
+
+struct bcm2835_mbox_tag_get_mac_address {
+ struct bcm2835_mbox_tag_hdr tag_hdr;
+ union {
+ struct {
+ } req;
+ struct {
+ u8 mac[6];
+ u8 pad[2];
+ } resp;
+ } body;
+};
+
#define BCM2835_MBOX_TAG_GET_ARM_MEMORY 0x00010005
struct bcm2835_mbox_tag_get_arm_mem {
diff --git a/board/raspberrypi/rpi_b/rpi_b.c b/board/raspberrypi/rpi_b/rpi_b.c
index f33fae9..eaeb182 100644
--- a/board/raspberrypi/rpi_b/rpi_b.c
+++ b/board/raspberrypi/rpi_b/rpi_b.c
@@ -29,6 +29,12 @@ struct msg_get_arm_mem {
u32 end_tag;
};
+struct msg_get_mac_address {
+ struct bcm2835_mbox_hdr hdr;
+ struct bcm2835_mbox_tag_get_mac_address get_mac_address;
+ u32 end_tag;
+};
+
struct msg_set_power_state {
struct bcm2835_mbox_hdr hdr;
struct bcm2835_mbox_tag_set_power_state set_power_state;
@@ -60,6 +66,26 @@ int dram_init(void)
return 0;
}
+int misc_init_r(void)
+{
+ ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16);
+ int ret;
+
+ BCM2835_MBOX_INIT_HDR(msg);
+ BCM2835_MBOX_INIT_TAG(&msg->get_mac_address, GET_MAC_ADDRESS);
+
+ ret = bcm2835_mbox_call_prop(BCM2835_MBOX_PROP_CHAN, &msg->hdr);
+ if (ret) {
+ printf("bcm2835: Could not query MAC address\n");
+ /* Ignore error; not critical */
+ return 0;
+ }
+
+ eth_setenv_enetaddr("usbethaddr", msg->get_mac_address.body.resp.mac);
+
+ return 0;
+}
+
static int power_on_module(u32 module)
{
ALLOC_ALIGN_BUFFER(struct msg_set_power_state, msg_pwr, 1, 16);
diff --git a/include/configs/rpi_b.h b/include/configs/rpi_b.h
index 0061de5..480d747 100644
--- a/include/configs/rpi_b.h
+++ b/include/configs/rpi_b.h
@@ -272,6 +272,7 @@
#define CONFIG_USB_STORAGE
#define CONFIG_USB_ETHER_SMSC95XX
#define CONFIG_CMD_USB
+#define CONFIG_MISC_INIT_R
#include <config_distro_defaults.h>
--
1.8.3.2
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