#define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \
| MACB_BIT(ISR_RLE) \
| MACB_BIT(TXERR))
-#define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP))
+#define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP) \
+ | MACB_BIT(TXUBR))
/* Max length of transmit frame must be a multiple of 8 bytes */
#define MACB_TX_LEN_ALIGN 8
netif_tx_start_all_queues(dev);
}
+static void macb_tx_restart(struct macb_queue *queue)
+{
+ unsigned int head = queue->tx_head;
+ unsigned int tail = queue->tx_tail;
+ struct macb *bp = queue->bp;
+
+ if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
+ queue_writel(queue, ISR, MACB_BIT(TXUBR));
+
+ if (head == tail)
+ return;
+
+ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
+}
+
static irqreturn_t macb_interrupt(int irq, void *dev_id)
{
struct macb_queue *queue = dev_id;
if (status & MACB_BIT(TCOMP))
macb_tx_interrupt(queue);
+ if (status & MACB_BIT(TXUBR))
+ macb_tx_restart(queue);
+
/* Link change detection isn't possible with RMII, so we'll
* add that if/when we get our hands on a full-blown MII PHY.
*/