ag71xx driver: add some debug stuff

SVN-Revision: 13462

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 81ebe8db0ad848bdc99e02a7621b556679e3e257..882b108e88ff843c77830846ef8f61c8c63af72b 100644 (file)
--- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
+++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c
@@ -69,6 +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);
@@ -315,6 +327,14 @@ static void ag71xx_dma_reset(struct ag71xx *ag)
        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);
 }
 
@@ -693,7 +713,9 @@ 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;