Gabe Black (gabeblack@chromium.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/3698
-gerrit
commit b8dcc4e089c188a37a19b9227c4358a669fe12f8 Author: Hung-Te Lin hungte@chromium.org 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 hungte@chromium.org Signed-off-by: Gabe Black gabeblack@chromium.org --- 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