bgmac: support up to 3 cores (devices) on a bus

Broadcom buses may have more than 1 Ethernet device. This is used e.g.
to have few interfaces connected to different switch ports. So far we
saw chipsets with only 2 devices (e.g. BCM4706) but recent ones have
up to 3 (e.g. Netgear R8000 uses 3rd interface for most of switch
traffic, lower interfaces are for some kind of offloading).

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 21e3c38..d043746 100644 (file)
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -1549,11 +1549,20 @@ static int bgmac_probe(struct bcma_device *core)
        struct net_device *net_dev;
        struct bgmac *bgmac;
        struct ssb_sprom *sprom = &core->bus->sprom;
-       u8 *mac = core->core_unit ? sprom->et1mac : sprom->et0mac;
+       u8 *mac;
        int err;
 
-       /* We don't support 2nd, 3rd, ... units, SPROM has to be adjusted */
-       if (core->core_unit > 1) {
+       switch (core->core_unit) {
+       case 0:
+               mac = sprom->et0mac;
+               break;
+       case 1:
+               mac = sprom->et1mac;
+               break;
+       case 2:
+               mac = sprom->et2mac;
+               break;
+       default:
                pr_err("Unsupported core_unit %d\n", core->core_unit);
                return -ENOTSUPP;
        }
@@ -1588,8 +1597,17 @@ static int bgmac_probe(struct bcma_device *core)
        }
        bgmac->cmn = core->bus->drv_gmac_cmn.core;
 
-       bgmac->phyaddr = core->core_unit ? sprom->et1phyaddr :
-                        sprom->et0phyaddr;
+       switch (core->core_unit) {
+       case 0:
+               bgmac->phyaddr = sprom->et0phyaddr;
+               break;
+       case 1:
+               bgmac->phyaddr = sprom->et1phyaddr;
+               break;
+       case 2:
+               bgmac->phyaddr = sprom->et2phyaddr;
+               break;
+       }
        bgmac->phyaddr &= BGMAC_PHY_MASK;
        if (bgmac->phyaddr == BGMAC_PHY_MASK) {
                bgmac_err(bgmac, "No PHY found\n");