[U-Boot] [PATCH v3 07/13] net: ftgmac100: handle timeouts when transmitting

[Cédric Le Goater]

Signed-off-by: Cédric Le Goater <c...@kaod.org>
---
 drivers/net/ftgmac100.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/ftgmac100.c b/drivers/net/ftgmac100.c
index b46187b567c6..edf34c601c68 100644
--- a/drivers/net/ftgmac100.c
+++ b/drivers/net/ftgmac100.c
@@ -28,6 +28,9 @@
 /* PKTBUFSTX/PKTBUFSRX must both be power of 2 */
 #define PKTBUFSTX      4       /* must be power of 2 */
 
+/* Timeout for transmit */
+#define FTGMAC100_TX_TIMEOUT_MS                1000
+
 /* Timeout for a mdio read/write operation */
 #define FTGMAC100_MDIO_TIMEOUT_USEC    10000
 
@@ -412,6 +415,7 @@ static int ftgmac100_send(struct udevice *dev, void 
*packet, int length)
                roundup(sizeof(*curr_des), ARCH_DMA_MINALIGN);
        ulong data_start;
        ulong data_end;
+       ulong start;
 
        invalidate_dcache_range(des_start, des_end);
 
@@ -444,6 +448,20 @@ static int ftgmac100_send(struct udevice *dev, void 
*packet, int length)
        /* Start transmit */
        writel(1, &ftgmac100->txpd);
 
+       /* Wait until packet is transmitted */
+       start = get_timer(0);
+       while (get_timer(start) < FTGMAC100_TX_TIMEOUT_MS) {
+               invalidate_dcache_range(des_start, des_end);
+               if (!(curr_des->txdes0 & FTGMAC100_TXDES0_TXDMA_OWN))
+                       break;
+               udelay(10);
+       }
+
+       if (get_timer(start) >= FTGMAC100_TX_TIMEOUT_MS) {
+               dev_err(dev, "transmit timeout\n");
+               return -ETIMEDOUT;
+       }
+
        debug("%s(): packet sent\n", __func__);
 
        /* Move to next descriptor */
-- 
2.17.1

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