ar71xx: fix broken LAN ports on the boards with AR8216 switch (closes #7024)

[openwrt.git] / target / linux / ar71xx / files / drivers / net / ag71xx / ag71xx_main.c

diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
index 06a1f67..4b35b1f 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -415,12 +415,12 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
 {
        u32 t;
 
-       t = (((u32) mac[0]) << 24) | (((u32) mac[1]) << 16)
-         | (((u32) mac[2]) << 8) | ((u32) mac[3]);
+       t = (((u32) mac[5]) << 24) | (((u32) mac[4]) << 16)
+         | (((u32) mac[3]) << 8) | ((u32) mac[2]);
 
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
 
-       t = (((u32) mac[4]) << 24) | (((u32) mac[5]) << 16);
+       t = (((u32) mac[1]) << 24) | (((u32) mac[0]) << 16);
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
 }
 
@@ -614,7 +614,8 @@ static netdev_tx_t ag71xx_hard_start_xmit(struct sk_buff *skb,
        if (!ag71xx_desc_empty(desc))
                goto err_drop;
 
-       ag71xx_add_ar8216_header(ag, skb);
+       if (ag71xx_has_ar8216(ag))
+               ag71xx_add_ar8216_header(ag, skb);
 
        if (skb->len <= 0) {
                DBG("%s: packet len is too small\n", ag->dev->name);
@@ -758,6 +759,25 @@ static int ag71xx_tx_packets(struct ag71xx *ag)
        return sent;
 }
 
+static int ag71xx_rx_copy_skb(struct ag71xx *ag, struct sk_buff **pskb,
+                             int pktlen)
+{
+       struct sk_buff *copy_skb;
+
+       copy_skb = netdev_alloc_skb(ag->dev, pktlen + NET_IP_ALIGN);
+       if (!copy_skb)
+               return -ENOMEM;
+
+       skb_reserve(copy_skb, NET_IP_ALIGN);
+       skb_copy_from_linear_data(*pskb, copy_skb->data, pktlen);
+       skb_put(copy_skb, pktlen);
+
+       dev_kfree_skb_any(*pskb);
+       *pskb = copy_skb;
+
+       return 0;
+}
+
 static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
 {
        struct net_device *dev = ag->dev;
@@ -772,6 +792,7 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                struct ag71xx_desc *desc = ring->buf[i].desc;
                struct sk_buff *skb;
                int pktlen;
+               int err = 0;
 
                if (ag71xx_desc_empty(desc))
                        break;
@@ -790,19 +811,21 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                dma_unmap_single(&dev->dev, ring->buf[i].dma_addr,
                                 AG71XX_RX_PKT_SIZE, DMA_FROM_DEVICE);
 
-               skb_put(skb, pktlen);
-
-               skb->dev = dev;
-               skb->ip_summed = CHECKSUM_NONE;
-
                dev->last_rx = jiffies;
                dev->stats.rx_packets++;
                dev->stats.rx_bytes += pktlen;
 
-               if (ag71xx_remove_ar8216_header(ag, skb) != 0) {
+               if (ag71xx_has_ar8216(ag))
+                       err = ag71xx_remove_ar8216_header(ag, skb, pktlen);
+               else
+                       err = ag71xx_rx_copy_skb(ag, &skb, pktlen);
+
+               if (err) {
                        dev->stats.rx_dropped++;
                        kfree_skb(skb);
                } else {
+                       skb->dev = dev;
+                       skb->ip_summed = CHECKSUM_NONE;
                        skb->protocol = eth_type_trans(skb, dev);
                        netif_receive_skb(skb);
                }
@@ -926,6 +949,20 @@ static void ag71xx_set_multicast_list(struct net_device *dev)
        /* TODO */
 }
 
+#ifdef CONFIG_NET_POLL_CONTROLLER
+/*
+ * Polling 'interrupt' - used by things like netconsole to send skbs
+ * without having to re-enable interrupts. It's not called while
+ * the interrupt routine is executing.
+ */
+static void ag71xx_netpoll(struct net_device *dev)
+{
+       disable_irq(dev->irq);
+       ag71xx_interrupt(dev->irq, dev);
+       enable_irq(dev->irq);
+}
+#endif
+
 static const struct net_device_ops ag71xx_netdev_ops = {
        .ndo_open               = ag71xx_open,
        .ndo_stop               = ag71xx_stop,
@@ -936,6 +973,9 @@ static const struct net_device_ops ag71xx_netdev_ops = {
        .ndo_change_mtu         = eth_change_mtu,
        .ndo_set_mac_address    = eth_mac_addr,
        .ndo_validate_addr      = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+       .ndo_poll_controller    = ag71xx_netpoll,
+#endif
 };
 
 static int __init ag71xx_probe(struct platform_device *pdev)