[ar71xx] ag71xx driver: don't use dma_cache_wback_inv

[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 5c440c9..16dc029 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -28,6 +28,21 @@ static int ag71xx_debug = -1;
 module_param(ag71xx_debug, int, 0);
 MODULE_PARM_DESC(ag71xx_debug, "Debug level (-1=defaults,0=none,...,16=all)");
 
+static void ag71xx_dump_dma_regs(struct ag71xx *ag)
+{
+       DBG("%s: dma_tx_ctrl=%08x, dma_tx_desc=%08x, dma_tx_status=%08x\n",
+               ag->dev->name,
+               ag71xx_rr(ag, AG71XX_REG_TX_CTRL),
+               ag71xx_rr(ag, AG71XX_REG_TX_DESC),
+               ag71xx_rr(ag, AG71XX_REG_TX_STATUS));
+
+       DBG("%s: dma_rx_ctrl=%08x, dma_rx_desc=%08x, dma_rx_status=%08x\n",
+               ag->dev->name,
+               ag71xx_rr(ag, AG71XX_REG_RX_CTRL),
+               ag71xx_rr(ag, AG71XX_REG_RX_DESC),
+               ag71xx_rr(ag, AG71XX_REG_RX_STATUS));
+}
+
 static void ag71xx_dump_regs(struct ag71xx *ag)
 {
        DBG("%s: mac_cfg1=%08x, mac_cfg2=%08x, ipg=%08x, hdx=%08x, mfl=%08x\n",
@@ -54,6 +69,18 @@ static void ag71xx_dump_regs(struct ag71xx *ag)
                ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
 }
 
+static inline void ag71xx_dump_intr(struct ag71xx *ag, char *label, u32 intr)
+{
+       DBG("%s: %s intr=%08x %s%s%s%s%s%s\n",
+               ag->dev->name, label, intr,
+               (intr & AG71XX_INT_TX_PS) ? "TXPS " : "",
+               (intr & AG71XX_INT_TX_UR) ? "TXUR " : "",
+               (intr & AG71XX_INT_TX_BE) ? "TXBE " : "",
+               (intr & AG71XX_INT_RX_PR) ? "RXPR " : "",
+               (intr & AG71XX_INT_RX_OF) ? "RXOF " : "",
+               (intr & AG71XX_INT_RX_BE) ? "RXBE " : "");
+}
+
 static void ag71xx_ring_free(struct ag71xx_ring *ring)
 {
        kfree(ring->buf);
@@ -169,6 +196,9 @@ static int ag71xx_ring_rx_init(struct ag71xx *ag)
                        break;
                }
 
+               dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
+                               DMA_FROM_DEVICE);
+
                skb->dev = ag->dev;
                skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
 
@@ -207,8 +237,12 @@ static int ag71xx_ring_rx_refill(struct ag71xx *ag)
                                break;
                        }
 
+                       dma_map_single(NULL, skb->data, AG71XX_RX_PKT_SIZE,
+                                       DMA_FROM_DEVICE);
+
                        skb_reserve(skb, AG71XX_RX_PKT_RESERVE);
                        skb->dev = ag->dev;
+
                        ring->buf[i].skb = skb;
                        ring->descs[i].data = virt_to_phys(skb->data);
                }
@@ -257,7 +291,7 @@ 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[2]);
+         | (((u32) mac[2]) << 8) | ((u32) mac[3]);
 
        ag71xx_wr(ag, AG71XX_REG_MAC_ADDR1, t);
 
@@ -276,6 +310,41 @@ static void ag71xx_hw_set_macaddr(struct ag71xx *ag, unsigned char *mac)
 
 #define FIFO_CFG0_INIT (FIFO_CFG0_ALL << FIFO_CFG0_ENABLE_SHIFT)
 
+static void ag71xx_dma_reset(struct ag71xx *ag)
+{
+       int i;
+
+       ag71xx_dump_dma_regs(ag);
+
+       /* stop RX and TX */
+       ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
+       ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
+
+       /* clear descriptor addresses */
+       ag71xx_wr(ag, AG71XX_REG_TX_DESC, 0);
+       ag71xx_wr(ag, AG71XX_REG_RX_DESC, 0);
+
+       /* clear pending RX/TX interrupts */
+       for (i = 0; i < 256; i++) {
+               ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_PR);
+               ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS);
+       }
+
+       /* clear pending errors */
+       ag71xx_wr(ag, AG71XX_REG_RX_STATUS, RX_STATUS_BE | RX_STATUS_OF);
+       ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_BE | TX_STATUS_UR);
+
+       if (ag71xx_rr(ag, AG71XX_REG_RX_STATUS))
+               printk(KERN_ALERT "%s: unable to clear DMA Rx status\n",
+                       ag->dev->name);
+
+       if (ag71xx_rr(ag, AG71XX_REG_TX_STATUS))
+               printk(KERN_ALERT "%s: unable to clear DMA Tx status\n",
+                       ag->dev->name);
+
+       ag71xx_dump_dma_regs(ag);
+}
+
 static void ag71xx_hw_init(struct ag71xx *ag)
 {
        struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
@@ -288,9 +357,6 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        ar71xx_device_start(pdata->reset_bit);
        mdelay(100);
 
-       /* setup MII interface type */
-       ag71xx_mii_ctrl_set_if(ag, pdata->mii_if);
-
        /* setup MAC configuration registers */
        ag71xx_wr(ag, AG71XX_REG_MAC_CFG1,
                pdata->is_ar91xx ? AR91XX_MAC_CFG1_INIT : AR71XX_MAC_CFG1_INIT);
@@ -300,6 +366,9 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        /* 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);
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG1, 0x0fff0000);
@@ -308,6 +377,8 @@ static void ag71xx_hw_init(struct ag71xx *ag)
        ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5,
                        pdata->is_ar91xx ? AR91XX_FIFO_CFG5_INIT
                                         : AR71XX_FIFO_CFG5_INIT);
+
+       ag71xx_dma_reset(ag);
 }
 
 static void ag71xx_hw_start(struct ag71xx *ag)
@@ -321,12 +392,10 @@ static void ag71xx_hw_start(struct ag71xx *ag)
 
 static void ag71xx_hw_stop(struct ag71xx *ag)
 {
-       /* stop RX and TX */
-       ag71xx_wr(ag, AG71XX_REG_RX_CTRL, 0);
-       ag71xx_wr(ag, AG71XX_REG_TX_CTRL, 0);
-
        /* disable all interrupts */
        ag71xx_wr(ag, AG71XX_REG_INT_ENABLE, 0);
+
+       ag71xx_dma_reset(ag);
 }
 
 static int ag71xx_open(struct net_device *dev)
@@ -406,7 +475,7 @@ static int ag71xx_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
                goto err_drop;
        }
 
-       dma_cache_wback_inv((unsigned long)skb->data, skb->len);
+       dma_map_single(NULL, skb->data, skb->len, DMA_TO_DEVICE);
 
        ring->buf[i].skb = skb;
 
@@ -559,13 +628,11 @@ static int ag71xx_rx_packets(struct ag71xx *ag, int limit)
                pktlen = ag71xx_desc_pktlen(desc);
                pktlen -= ETH_FCS_LEN;
 
-               /* TODO: move it into the refill function */
-               dma_cache_wback_inv((unsigned long)skb->data, pktlen);
                skb_put(skb, pktlen);
 
                skb->dev = dev;
                skb->protocol = eth_type_trans(skb, dev);
-               skb->ip_summed = CHECKSUM_UNNECESSARY;
+               skb->ip_summed = CHECKSUM_NONE;
 
                netif_receive_skb(skb);
 
@@ -651,7 +718,9 @@ static irqreturn_t ag71xx_interrupt(int irq, void *dev_id)
        u32 status;
 
        status = ag71xx_rr(ag, AG71XX_REG_INT_STATUS);
+       ag71xx_dump_intr(ag, "raw", status);
        status &= ag71xx_rr(ag, AG71XX_REG_INT_ENABLE);
+       ag71xx_dump_intr(ag, "masked", status);
 
        if (unlikely(!status))
                return IRQ_NONE;