In case there is an EEPROM attached to the KS8851 MAC and the EEPROM contains a valid MAC address, the MAC address is loaded into the NIC registers on power on. Read the MAC address out of the NIC registers and provide it to U-Boot.
Signed-off-by: Marek Vasut marex@denx.de Cc: Eugen Hristev eugen.hristev@microchip.com Cc: Joe Hershberger joe.hershberger@ni.com --- drivers/net/ks8851_mll.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+)
diff --git a/drivers/net/ks8851_mll.c b/drivers/net/ks8851_mll.c index d22668446d..58e065cdcc 100644 --- a/drivers/net/ks8851_mll.c +++ b/drivers/net/ks8851_mll.c @@ -622,6 +622,34 @@ static int ks8851_write_hwaddr(struct udevice *dev) return 0; }
+static int ks8851_read_rom_hwaddr(struct udevice *dev) +{ + struct ks_net *ks = dev_get_priv(dev); + struct eth_pdata *pdata = dev_get_platdata(dev); + u16 addrl, addrm, addrh; + + /* No EEPROM means no valid MAC address. */ + if (!(ks_rdreg16(ks, KS_CCR) & CCR_EEPROM)) + return -EINVAL; + + /* + * If the EEPROM contains valid MAC address, it is loaded into + * the NIC on power on. Read the MAC out of the NIC registers. + */ + addrl = ks_rdreg16(ks, KS_MARL); + addrm = ks_rdreg16(ks, KS_MARM); + addrh = ks_rdreg16(ks, KS_MARH); + + pdata->enetaddr[0] = (addrh >> 8) & 0xff; + pdata->enetaddr[1] = addrh & 0xff; + pdata->enetaddr[2] = (addrm >> 8) & 0xff; + pdata->enetaddr[3] = addrm & 0xff; + pdata->enetaddr[4] = (addrl >> 8) & 0xff; + pdata->enetaddr[5] = addrl & 0xff; + + return !is_valid_ethaddr(pdata->enetaddr); +} + static int ks8851_bind(struct udevice *dev) { return device_set_name(dev, dev->name); @@ -654,6 +682,7 @@ static const struct eth_ops ks8851_ops = { .send = ks8851_send, .recv = ks8851_recv, .write_hwaddr = ks8851_write_hwaddr, + .read_rom_hwaddr = ks8851_read_rom_hwaddr, };
static const struct udevice_id ks8851_ids[] = {