[U-Boot] ARM: rpi_b: query internal MAC address from firmware

[Marek Vasut]

On Wednesday, September 24, 2014 at 09:44:40 PM, Stephen Warren wrote:
> On 09/24/2014 01:27 PM, Jeroen Hofstee wrote:
> > Hello Stephan,
> > 
> > On 24-09-14 05:45, Stephen Warren wrote:
> >> 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 at wwwdotorg.org>
> >> ---
> >> This depends on "usb: dwc2: Add driver for Synopsis DWC2 USB IP block
> >> from Marek Vasut".
> >> 
> >>   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(+)
> > 
> > [snip]
> > 
> >> +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;
> >> +}
> >> +
> > 
> > Normally this should be within a check for if (!getenv("usbethaddr")).
> > Any reason to deviate from that?
> 
> That makes sense. I simply wasn't aware of the convention. I'll amend
> the patch.

OK, waiting for V2

Best regards,
Marek Vasut