From 28837c6b014dec37a3b4deeb8407469356b81e05 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= Date: Fri, 4 Apr 2014 20:32:59 +0300 Subject: allwinner/a10: Hide SoC specific UART functions MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If platform has a component coreboot has to communicate with using one of the UARTs, that device would not be part of the SoC and must not use functions specific to a10 UART. Change-Id: Ifacfc94dfde9979eae0b0cfb723a6eaa1fbcd659 Signed-off-by: Kyösti Mälkki Reviewed-on: http://review.coreboot.org/5469 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks Reviewed-by: Paul Menzel --- src/cpu/allwinner/a10/uart.c | 40 +++++++++++++++++++++++++++++----------- 1 file changed, 29 insertions(+), 11 deletions(-) (limited to 'src/cpu/allwinner/a10/uart.c') diff --git a/src/cpu/allwinner/a10/uart.c b/src/cpu/allwinner/a10/uart.c index 1885ace453..feccc8232f 100644 --- a/src/cpu/allwinner/a10/uart.c +++ b/src/cpu/allwinner/a10/uart.c @@ -13,12 +13,11 @@ /** * \brief Configure line control settings for UART */ -void a10_uart_configure(void *uart_base, u32 baud_rate, u8 data_bits, +static void a10_uart_configure(struct a10_uart *uart, u32 baud_rate, u8 data_bits, enum uart_parity parity, u8 stop_bits) { u32 reg32; u16 div; - struct a10_uart *uart = uart_base; div = (u16) uart_baudrate_divisor(baud_rate, uart_platform_refclk(), 16); @@ -44,10 +43,8 @@ void a10_uart_configure(void *uart_base, u32 baud_rate, u8 data_bits, write32(reg32, &uart->lcr); } -void a10_uart_enable_fifos(void *uart_base) +static void a10_uart_enable_fifos(struct a10_uart *uart) { - struct a10_uart *uart = uart_base; - write32(UART_FCR_FIFO_EN, &uart->fcr); } @@ -70,10 +67,8 @@ static int rx_fifo_empty(struct a10_uart *uart) * * Blocks until at least a byte is available. */ -u8 a10_uart_rx_blocking(void *uart_base) +static u8 a10_uart_rx_blocking(struct a10_uart *uart) { - struct a10_uart *uart = uart_base; - while (rx_fifo_empty(uart)) ; return read32(&uart->rbr); @@ -84,11 +79,34 @@ u8 a10_uart_rx_blocking(void *uart_base) * * Blocks until there is space in the FIFO. */ -void a10_uart_tx_blocking(void *uart_base, u8 data) +static void a10_uart_tx_blocking(struct a10_uart *uart, u8 data) { - struct a10_uart *uart = uart_base; - while (tx_fifo_full(uart)) ; return write32(data, &uart->thr); } + + +void uart_init(int idx) +{ + struct a10_uart *uart_base = uart_platform_baseptr(idx); + + /* Use default 8N1 encoding */ + a10_uart_configure(uart_base, default_baudrate(), + 8, UART_PARITY_NONE, 1); + a10_uart_enable_fifos(uart_base); +} + +unsigned char uart_rx_byte(int idx) +{ + return a10_uart_rx_blocking(uart_platform_baseptr(idx)); +} + +void uart_tx_byte(int idx, unsigned char data) +{ + a10_uart_tx_blocking(uart_platform_baseptr(idx), data); +} + +void uart_tx_flush(int idx) +{ +} -- cgit v1.2.3