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 swarren@wwwdotorg.org --- v2: Don't set usbethaddr if it's already set --- arch/arm/include/asm/arch-bcm2835/mbox.h | 14 ++++++++++++++ board/raspberrypi/rpi_b/rpi_b.c | 29 +++++++++++++++++++++++++++++ include/configs/rpi_b.h | 1 + 3 files changed, 44 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 220bb90..a92c1ec 100644 --- a/board/raspberrypi/rpi_b/rpi_b.c +++ b/board/raspberrypi/rpi_b/rpi_b.c @@ -31,6 +31,12 @@ 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; @@ -62,6 +68,29 @@ int dram_init(void) return 0; }
+int misc_init_r(void) +{ + ALLOC_ALIGN_BUFFER(struct msg_get_mac_address, msg, 1, 16); + int ret; + + if (getenv("usbethaddr")) + return 0; + + 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 9a53232..3c3ba9a 100644 --- a/include/configs/rpi_b.h +++ b/include/configs/rpi_b.h @@ -182,6 +182,7 @@ #define CONFIG_USB_STORAGE #define CONFIG_USB_HOST_ETHER #define CONFIG_USB_ETHER_SMSC95XX +#define CONFIG_MISC_INIT_R #endif
#endif