diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0020-net-mvneta-read-MAC-address-from-hardware-when-avail.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0020-net-mvneta-read-MAC-address-from-hardware-when-avail.patch | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0020-net-mvneta-read-MAC-address-from-hardware-when-avail.patch b/target/linux/mvebu/patches-3.10/0020-net-mvneta-read-MAC-address-from-hardware-when-avail.patch new file mode 100644 index 0000000000..9866f0c537 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0020-net-mvneta-read-MAC-address-from-hardware-when-avail.patch @@ -0,0 +1,112 @@ +From 25d3318a445c4f4360f86bf6d1d1a320d9646bb5 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Tue, 4 Jun 2013 04:52:23 +0000 +Subject: [PATCH 020/203] net: mvneta: read MAC address from hardware when + available + +This patch improves the logic used by the mvneta driver to find a MAC +address for a particular interface. Until now, it was only looking at +the Device Tree, and if no address was found, was falling back to +generating a random MAC address. + +This patch adds the intermediate solution of reading the MAC address +from the hardware registers, in case it has been set by the +bootloader. So the order is now: + + 1) MAC address from the Device Tree + 2) MAC address from the hardware registers + 3) Random MAC address + +This requires moving the MAC address initialization a little bit later +in the ->probe() code, because it now requires the hardware registers +to be remapped. + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> +Cc: Joe Perches <joe@perches.com> +Signed-off-by: David S. Miller <davem@davemloft.net> +--- + drivers/net/ethernet/marvell/mvneta.c | 44 ++++++++++++++++++++++++++++------- + 1 file changed, 35 insertions(+), 9 deletions(-) + +--- a/drivers/net/ethernet/marvell/mvneta.c ++++ b/drivers/net/ethernet/marvell/mvneta.c +@@ -2260,6 +2260,21 @@ static int mvneta_change_mtu(struct net_ + return 0; + } + ++/* Get mac address */ ++static void mvneta_get_mac_addr(struct mvneta_port *pp, unsigned char *addr) ++{ ++ u32 mac_addr_l, mac_addr_h; ++ ++ mac_addr_l = mvreg_read(pp, MVNETA_MAC_ADDR_LOW); ++ mac_addr_h = mvreg_read(pp, MVNETA_MAC_ADDR_HIGH); ++ addr[0] = (mac_addr_h >> 24) & 0xFF; ++ addr[1] = (mac_addr_h >> 16) & 0xFF; ++ addr[2] = (mac_addr_h >> 8) & 0xFF; ++ addr[3] = mac_addr_h & 0xFF; ++ addr[4] = (mac_addr_l >> 8) & 0xFF; ++ addr[5] = mac_addr_l & 0xFF; ++} ++ + /* Handle setting mac address */ + static int mvneta_set_mac_addr(struct net_device *dev, void *addr) + { +@@ -2678,7 +2693,9 @@ static int mvneta_probe(struct platform_ + u32 phy_addr; + struct mvneta_port *pp; + struct net_device *dev; +- const char *mac_addr; ++ const char *dt_mac_addr; ++ char hw_mac_addr[ETH_ALEN]; ++ const char *mac_from; + int phy_mode; + int err; + +@@ -2714,13 +2731,6 @@ static int mvneta_probe(struct platform_ + goto err_free_irq; + } + +- mac_addr = of_get_mac_address(dn); +- +- if (!mac_addr || !is_valid_ether_addr(mac_addr)) +- eth_hw_addr_random(dev); +- else +- memcpy(dev->dev_addr, mac_addr, ETH_ALEN); +- + dev->tx_queue_len = MVNETA_MAX_TXD; + dev->watchdog_timeo = 5 * HZ; + dev->netdev_ops = &mvneta_netdev_ops; +@@ -2751,6 +2761,21 @@ static int mvneta_probe(struct platform_ + + clk_prepare_enable(pp->clk); + ++ dt_mac_addr = of_get_mac_address(dn); ++ if (dt_mac_addr && is_valid_ether_addr(dt_mac_addr)) { ++ mac_from = "device tree"; ++ memcpy(dev->dev_addr, dt_mac_addr, ETH_ALEN); ++ } else { ++ mvneta_get_mac_addr(pp, hw_mac_addr); ++ if (is_valid_ether_addr(hw_mac_addr)) { ++ mac_from = "hardware"; ++ memcpy(dev->dev_addr, hw_mac_addr, ETH_ALEN); ++ } else { ++ mac_from = "random"; ++ eth_hw_addr_random(dev); ++ } ++ } ++ + pp->tx_done_timer.data = (unsigned long)dev; + + pp->tx_ring_size = MVNETA_MAX_TXD; +@@ -2783,7 +2808,8 @@ static int mvneta_probe(struct platform_ + goto err_deinit; + } + +- netdev_info(dev, "mac: %pM\n", dev->dev_addr); ++ netdev_info(dev, "Using %s mac address %pM\n", mac_from, ++ dev->dev_addr); + + platform_set_drvdata(pdev, pp->dev); + |