New patch to review for coreboot: d6a3c94 snow: Add flush to UART driver.

[Gabe Black]

Gabe Black ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3698

-gerrit

commit d6a3c94f930b3c4d21926a59b305ae28aae5c725
Author: Hung-Te Lin 
Date:   Wed Jun 5 14:06:55 2013 -0700

snow: Add flush to UART driver.

Wait for UART FIFO to be ready.
    (Credit to dhendrix for finding the bits to test with.)

Change-Id: Ib6733e422cbc1c61b942bd90d85f88a3f412d6ff
    Signed-off-by: Hung-Te Lin 
    Signed-off-by: Gabe Black 
---
 src/cpu/samsung/exynos5250/uart.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/cpu/samsung/exynos5250/uart.c b/src/cpu/samsung/exynos5250/uart.c
index 24812ae..41dc709 100644
--- a/src/cpu/samsung/exynos5250/uart.c
+++ b/src/cpu/samsung/exynos5250/uart.c
@@ -162,12 +162,19 @@ static void exynos5_uart_tx_byte(unsigned char data)
    writeb(data, &uart->utxh);
 }

+static void exynos5_uart_tx_flush(void)
+{
+	struct s5p_uart *uart = (struct s5p_uart *)base_port;
+
+	while (readl(&uart->ufstat) & 0x1ff0000);
+}
+
 #if !defined(__PRE_RAM__)

static const struct console_driver exynos5_uart_console __console = {
    .init     = exynos5_init_dev,
    .tx_byte  = exynos5_uart_tx_byte,
-//	.tx_flush = exynos5_uart_tx_flush,
+	.tx_flush = exynos5_uart_tx_flush,
    .rx_byte  = exynos5_uart_rx_byte,
 //	.tst_byte = exynos5_uart_tst_byte,
 };
@@ -196,6 +203,7 @@ void uart_tx_byte(unsigned char data)

void uart_tx_flush(void)
 {
+	exynos5_uart_tx_flush();
 }

#endif