ar71xx: on ar724x only reset the link status in the restart handler, the fast reset...

[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 ce2af53..ee76c9a 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -374,8 +374,8 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
        mdelay(1);
 
        /* clear descriptor addresses */
-       ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0);
-       ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0);
+       ag71xx_wr(ag, AG71XX_REG_TX_DESC, ag->stop_desc_dma);
+       ag71xx_wr(ag, AG71XX_REG_RX_DESC, ag->stop_desc_dma);
 
        /* clear pending RX/TX interrupts */
        for (i = 0; i < 256; i++) {
@@ -425,9 +425,39 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
 
 static void ag71xx_hw_stop(struct ag71xx *ag)
 {
-       /* disable all interrupts and stop the rx engine */
+       /* disable all interrupts and stop the rx/tx engine */
        ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
        ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
+       ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
+}
+
+static void ag71xx_hw_setup(struct ag71xx *ag)
+{
+       struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+
+       /* setup MAC configuration registers */
+       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);
+
+       /* setup max frame length */
+       ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
+
+       /* setup MII interface type */
+       ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
+
+       /* setup FIFO configuration registers */
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
+       if (pdata->is_ar724x) {
+               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, pdata->fifo_cfg1);
+               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, pdata->fifo_cfg2);
+       } else {
+               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
+               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);
+       }
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
+       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
 }
 
 static void ag71xx_hw_init(struct ag71xx *ag)
@@ -452,36 +482,43 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        ag71xx_sb(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_SR);
        udelay(20);
 
-       ar71xx_device_stop(pdata->reset_bit);
+       ar71xx_device_stop(reset_mask);
        mdelay(100);
-       ar71xx_device_start(pdata->reset_bit);
+       ar71xx_device_start(reset_mask);
        mdelay(200);
 
-       /* setup MAC configuration registers */
-       ag71xx_wr(ag, AG71XX_REG_MAC_CFG1, MAC_CFG1_INIT);
+       ag71xx_hw_setup(ag);
 
-       ag71xx_sb(ag, AG71XX_REG_MAC_CFG2,
-                 MAC_CFG2_PAD_CRC_EN | MAC_CFG2_LEN_CHECK);
+       ag71xx_dma_reset(ag);
+}
 
-       /* setup max frame length */
-       ag71xx_wr(ag, AG71XX_REG_MAC_MFL, AG71XX_TX_MTU_LEN);
+static void ag71xx_fast_reset(struct ag71xx *ag)
+{
+       struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
+       struct net_device *dev = ag->dev;
+       u32 reset_mask = pdata->reset_bit;
+       u32 rx_ds, tx_ds;
+       u32 mii_reg;
 
-       /* setup MII interface type */
-       ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
+       reset_mask &= RESET_MODULE_GE0_MAC | RESET_MODULE_GE1_MAC;
 
-       /* setup FIFO configuration registers */
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG0, FIFO_CFG0_INIT);
-       if (pdata->is_ar724x) {
-               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, pdata->fifo_cfg1);
-               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, pdata->fifo_cfg2);
-       } else {
-               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
-               ag71xx_wr(ag, AG71XX_REG_FIFO_CFG2, 0x00001fff);
-       }
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG4, FIFO_CFG4_INIT);
-       ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, FIFO_CFG5_INIT);
+       mii_reg = ag71xx_rr(ag, AG71XX_REG_MII_CFG);
+       rx_ds = ag71xx_rr(ag, AG71XX_REG_RX_DESC);
+       tx_ds = ag71xx_rr(ag, AG71XX_REG_TX_DESC);
+
+       ar71xx_device_stop(reset_mask);
+       udelay(10);
+       ar71xx_device_start(reset_mask);
+       udelay(10);
 
        ag71xx_dma_reset(ag);
+       ag71xx_hw_setup(ag);
+
+       ag71xx_wr(ag, AG71XX_REG_RX_DESC, rx_ds);
+       ag71xx_wr(ag, AG71XX_REG_TX_DESC, tx_ds);
+       ag71xx_wr(ag, AG71XX_REG_MII_CFG, mii_reg);
+
+       ag71xx_hw_set_macaddr(ag, dev->dev_addr);
 }
 
 static void ag71xx_hw_start(struct ag71xx *ag)
@@ -509,6 +546,9 @@ void ag71xx_link_adjust(struct ag71xx *ag)
                return;
        }
 
+       if (pdata->is_ar724x)
+               ag71xx_fast_reset(ag);
+
        cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
        cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
        cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
@@ -755,6 +795,12 @@ static void ag71xx_restart_work_func(struct work_struct *work)
 {
        struct ag71xx *ag = container_of(work, struct ag71xx, restart_work);
 
+       if (ag71xx_get_pdata(ag)->is_ar724x) {
+               ag->link = 0;
+               ag71xx_link_adjust(ag);
+               return;
+       }
+
        ag71xx_stop(ag->dev);
        ag71xx_open(ag->dev);
 }
@@ -1085,6 +1131,16 @@ static int __devinit ag71xx_probe(struct platform_device *pdev)
        ag->tx_ring.size = AG71XX_TX_RING_SIZE_DEFAULT;
        ag->rx_ring.size = AG71XX_RX_RING_SIZE_DEFAULT;
 
+       ag->stop_desc = dma_alloc_coherent(NULL,
+               sizeof(struct ag71xx_desc), &ag->stop_desc_dma, GFP_KERNEL);
+
+       if (!ag->stop_desc)
+               goto err_free_irq;
+
+       ag->stop_desc->data = 0;
+       ag->stop_desc->ctrl = 0;
+       ag->stop_desc->next = (u32) ag->stop_desc_dma;
+
        memcpy(dev->dev_addr, pdata->mac_addr, ETH_ALEN);
 
        netif_napi_add(dev, &ag->napi, ag71xx_poll, AG71XX_NAPI_WEIGHT);
@@ -1092,7 +1148,7 @@ static int __devinit ag71xx_probe(struct platform_device *pdev)
        err = register_netdev(dev);
        if (err) {
                dev_err(&pdev->dev, "unable to register net device\n");
-               goto err_free_irq;
+               goto err_free_desc;
        }
 
        printk(KERN_INFO "%s: Atheros AG71xx at 0x%08lx, irq %d\n",
@@ -1120,6 +1176,9 @@ err_phy_disconnect:
        ag71xx_phy_disconnect(ag);
 err_unregister_netdev:
        unregister_netdev(dev);
+err_free_desc:
+       dma_free_coherent(NULL, sizeof(struct ag71xx_desc), ag->stop_desc,
+                         ag->stop_desc_dma);
 err_free_irq:
        free_irq(dev->irq, dev);
 err_unmap_mii_ctrl: