diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2013-06-05 14:06:55 -0700 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2013-07-10 22:49:18 +0200 |
| commit | 7dd581494dbaff64e4a2dd31f29cb254104d2d03 (patch) | |
| tree | dcd615b80927014cf180a2b80324926ea4333be8 /src/cpu | |
| parent | ce7a5a790be1cd734c5d1c9f934ade0433c0b96b (diff) | |
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>
Reviewed-on: http://review.coreboot.org/3698
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/samsung/exynos5250/uart.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/cpu/samsung/exynos5250/uart.c b/src/cpu/samsung/exynos5250/uart.c index 24812ae64f..41dc709c97 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 |