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net: ks8851: Implement EEPROM MAC address readout

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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>
This commit is contained in:
Marek Vasut 2020-10-08 15:14:17 +02:00 committed by Tom Rini
parent 22ad69b798
commit 68cbc63da0
1 changed files with 29 additions and 0 deletions
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29
drivers/net/ks8851_mll.c
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@ -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[] = {