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[ar71xx] ag71xx driver: apply 2.6.28 specific patches
[openwrt/svn-archive/archive.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 16cb4ddd3910587084ac3949691be9cb261df873..01834887c5f0e9332a4abbacc10d783cbb6eff3c 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -1,7 +1,7 @@
 /*
  *  Atheros AR71xx built-in ethernet mac driver
  *
- *  Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
+ *  Copyright (C) 2008-2009 Gabor Juhos <juhosg@openwrt.org>
  *  Copyright (C) 2008 Imre Kaloz <kaloz@openwrt.org>
  *
  *  Based on Atheros' AG7100 driver
@@ -231,11 +231,8 @@ static int ag71xx_ring_rx_refill(struct ag71xx *ag)
                        struct sk_buff *skb;
 
                        skb = dev_alloc_skb(AG71XX_RX_PKT_SIZE);
-                       if (skb == NULL) {
-                               printk(KERN_ERR "%s: no memory for skb\n",
-                                       ag->dev->name);
+                       if (skb == NULL)
                                break;
-                       }
 
                        dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
                                        DMA_FROM_DEVICE);
@@ -299,17 +296,6 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR2, t);
 }
 
-#define AR71XX_MAC_CFG1_INIT   (MAC_CFG1_RXE | MAC_CFG1_TXE | \
-                                MAC_CFG1_SRX | MAC_CFG1_STX)
-#define AR71XX_FIFO_CFG5_INIT  0x0007ffef
-
-#define AR91XX_MAC_CFG1_INIT   (MAC_CFG1_RXE | MAC_CFG1_TXE | \
-                                MAC_CFG1_SRX | MAC_CFG1_STX | \
-                                MAC_CFG1_TFC | MAC_CFG1_RFC)
-#define AR91XX_FIFO_CFG5_INIT  0x0007efef
-
-#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
-
 static void ag71xx_dma_reset(struct ag71xx *ag)
 {
        int i;
@@ -345,6 +331,25 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
        ag71xx_dump_dma_regs(ag);
 }
 
+#define MAC_CFG1_INIT  (MAC_CFG1_RXE | MAC_CFG1_TXE | \
+                        MAC_CFG1_SRX | MAC_CFG1_STX)
+
+#define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
+
+#define FIFO_CFG4_INIT (FIFO_CFG4_DE | FIFO_CFG4_DV | FIFO_CFG4_FC | \
+                        FIFO_CFG4_CE | FIFO_CFG4_CR | FIFO_CFG4_LM | \
+                        FIFO_CFG4_LO | FIFO_CFG4_OK | FIFO_CFG4_MC | \
+                        FIFO_CFG4_BC | FIFO_CFG4_DR | FIFO_CFG4_LE | \
+                        FIFO_CFG4_CF | FIFO_CFG4_PF | FIFO_CFG4_UO | \
+                        FIFO_CFG4_VT)
+
+#define FIFO_CFG5_INIT (FIFO_CFG5_DE | FIFO_CFG5_DV | FIFO_CFG5_FC | \
+                        FIFO_CFG5_CE | FIFO_CFG5_LO | FIFO_CFG5_OK | \
+                        FIFO_CFG5_MC | FIFO_CFG5_BC | FIFO_CFG5_DR | \
+                        FIFO_CFG5_CF | FIFO_CFG5_PF | FIFO_CFG5_VT | \
+                        FIFO_CFG5_LE | FIFO_CFG5_FT | FIFO_CFG5_16 | \
+                        FIFO_CFG5_17 | FIFO_CFG5_SF)
+
 static void ag71xx_hw_init(struct ag71xx *ag)
 {
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
@@ -358,8 +363,7 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        mdelay(100);
 
        /* setup MAC configuration registers */
-       ag71xx_wr(ag, AG71XX_REG_MAC_CFG1,
-               pdata->is_ar91xx ? AR91XX_MAC_CFG1_INIT : AR71XX_MAC_CFG1_INIT);
+       ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
        ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
                  MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
 
@@ -373,10 +377,8 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, 0x0000ffff);
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5,
-                       pdata->is_ar91xx ? AR91XX_FIFO_CFG5_INIT
-                                        : AR71XX_FIFO_CFG5_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
 
        ag71xx_dma_reset(ag);
 }
@@ -443,6 +445,7 @@ static int ag71xx_stop(struct net_device *dev)
        ag71xx_phy_stop(ag);
 
        napi_disable(&ag->napi);
+       del_timer_sync(&ag->oom_timer);
 
        spin_unlock_irqrestore(&ag->lock, flags);
 
@@ -551,6 +554,14 @@ static int ag71xx_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
        return -EOPNOTSUPP;
 }
 
+static void ag71xx_oom_timer_handler(unsigned long data)
+{
+       struct net_device *dev = (struct net_device *) data;
+       struct ag71xx *ag = netdev_priv(dev);
+
+       netif_rx_schedule(dev, &ag->napi);
+}
+
 static void ag71xx_tx_timeout(struct net_device *dev)
 {
        struct ag71xx *ag = netdev_priv(dev);
@@ -664,6 +675,7 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
        struct ag71xx *ag = container_of(napi, struct ag71xx, napi);
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
        struct net_device *dev = ag->dev;
+       struct ag71xx_ring *rx_ring;
        unsigned long flags;
        u32 status;
        int done;
@@ -674,7 +686,9 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
        DBG("%s: processing RX ring\n", dev->name);
        done = ag71xx_rx_packets(ag, limit);
 
-       /* TODO: add OOM handler */
+       rx_ring = &ag->rx_ring;
+       if (rx_ring->buf[rx_ring->dirty % AG71XX_RX_RING_SIZE].skb == NULL)
+               goto oom;
 
        status = ag71xx_rr(ag, AG71XX_REG_RX_STATUS);
        if (unlikely(status & RX_STATUS_OF)) {
@@ -709,6 +723,14 @@ static int ag71xx_poll(struct napi_struct *napi, int limit)
        DBG("%s: stay in polling mode, done=%d, limit=%d\n",
                        dev->name, done, limit);
        return done;
+
+ oom:
+       if (netif_msg_rx_err(ag))
+               printk(KERN_DEBUG "%s: out of memory\n", dev->name);
+
+       mod_timer(&ag->oom_timer, jiffies + AG71XX_OOM_REFILL);
+       netif_rx_complete(dev, napi);
+       return 0;
 }
 
 static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
@@ -775,7 +797,7 @@ static int __init ag71xx_probe(struct platform_device *pdev)
        ag = netdev_priv(dev);
        ag->pdev = pdev;
        ag->dev = dev;
-       ag->mii_bus = &ag71xx_mdio_bus->mii_bus;
+       ag->mii_bus = ag71xx_mdio_bus->mii_bus;
        ag->msg_enable = netif_msg_init(ag71xx_debug,
                                        AG71XX_DEFAULT_MSG_ENABLE);
        spin_lock_init(&ag->lock);
@@ -842,16 +864,13 @@ static int __init ag71xx_probe(struct platform_device *pdev)
        dev->tx_timeout = ag71xx_tx_timeout;
        INIT_WORK(&ag->restart_work, ag71xx_restart_work_func);
 
-       netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
+       init_timer(&ag->oom_timer);
+       ag->oom_timer.data = (unsigned long) dev;
+       ag->oom_timer.function = ag71xx_oom_timer_handler;
 
-       if (is_valid_ether_addr(pdata->mac_addr))
-               memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
-       else {
-               dev->dev_addr[0] = 0xde;
-               dev->dev_addr[1] = 0xad;
-               get_random_bytes(&dev->dev_addr[2], 3);
-               dev->dev_addr[5] = pdev->id & 0xff;
-       }
+       memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
+
+       netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
 
        err = register_netdev(dev);
        if (err) {
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