On Wed, Oct 10, 2018 at 6:48 AM Cédric Le Goater <c...@kaod.org> wrote:
>
> 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) {
In general we prefer to use wait_bit.h for such things. Probably just
define a BUILD_WAIT_FOR_BIT() in your .c to handle your memory access.
> + 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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