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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.patch112
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);
+