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authorKyösti Mälkki <kyosti.malkki@gmail.com>2014-02-24 20:51:30 +0200
committerPatrick Georgi <patrick@georgi-clan.de>2014-04-09 11:13:03 +0200
commitc2610a4a186c6e5a05f6518c2c7a734fde8f6cfd (patch)
tree21af900856344ac5a21ff6eca474d54fd7de97ac /src/cpu/samsung
parente5760af3980ea4c55afd7e759e8ca2a078a4a1dc (diff)
uart: Prepare to support multiple base addresses
Prepare low-level register access to take UART base address as a parameter. This is done to support a list of base addresses defined in the platform. Change-Id: Ie630e55f2562f099b0ba9eb94b08c92d26dfdf2e Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/5309 Tested-by: build bot (Jenkins) Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src/cpu/samsung')
-rw-r--r--src/cpu/samsung/exynos5250/uart.c50
-rw-r--r--src/cpu/samsung/exynos5420/uart.c44
2 files changed, 44 insertions, 50 deletions
diff --git a/src/cpu/samsung/exynos5250/uart.c b/src/cpu/samsung/exynos5250/uart.c
index 14d140c4dc..860d020a92 100644
--- a/src/cpu/samsung/exynos5250/uart.c
+++ b/src/cpu/samsung/exynos5250/uart.c
@@ -28,9 +28,6 @@
#define RX_FIFO_FULL_MASK (1 << 8)
#define TX_FIFO_FULL_MASK (1 << 24)
-/* FIXME(dhendrix): exynos5 has 4 UARTs and its functions in u-boot take a
- base_port argument. However console_driver functions do not. */
-static uint32_t base_port = CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
/*
* The coefficient, used to calculate the baudrate on S5P UARTs is
@@ -58,9 +55,8 @@ static const int udivslot[] = {
0xffdf,
};
-static void serial_setbrg_dev(void)
+static void serial_setbrg_dev(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
u32 uclk;
u32 val;
@@ -87,10 +83,8 @@ static void serial_setbrg_dev(void)
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*/
-static void exynos5_init_dev(void)
+static void exynos5_init_dev(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
// TODO initialize with correct peripheral id by base_port.
exynos_pinmux_uart3();
@@ -102,12 +96,11 @@ static void exynos5_init_dev(void)
/* No interrupts, no DMA, pure polling */
writel(0x245, &uart->ucon);
- serial_setbrg_dev();
+ serial_setbrg_dev(uart);
}
-static int exynos5_uart_err_check(int op)
+static int exynos5_uart_err_check(struct s5p_uart *uart, int op)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
unsigned int mask;
/*
@@ -130,14 +123,12 @@ static int exynos5_uart_err_check(int op)
* otherwise. When the function is successful, the character read is
* written into its argument c.
*/
-static unsigned char exynos5_uart_rx_byte(void)
+static unsigned char exynos5_uart_rx_byte(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
/* wait for character to arrive */
while (!(readl(&uart->ufstat) & (RX_FIFO_COUNT_MASK |
RX_FIFO_FULL_MASK))) {
- if (exynos5_uart_err_check(0))
+ if (exynos5_uart_err_check(uart, 0))
return 0;
}
@@ -147,49 +138,54 @@ static unsigned char exynos5_uart_rx_byte(void)
/*
* Output a single byte to the serial port.
*/
-static void exynos5_uart_tx_byte(unsigned char data)
+static void exynos5_uart_tx_byte(struct s5p_uart *uart, unsigned char data)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
/* wait for room in the tx FIFO */
while ((readl(&uart->ufstat) & TX_FIFO_FULL_MASK)) {
- if (exynos5_uart_err_check(1))
+ if (exynos5_uart_err_check(uart, 1))
return;
}
writeb(data, &uart->utxh);
}
-static void exynos5_uart_tx_flush(void)
+static void exynos5_uart_tx_flush(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
while (readl(&uart->ufstat) & 0x1ff0000);
}
+unsigned int uart_platform_base(int idx)
+{
+ return CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
+}
+
#if !defined(__PRE_RAM__)
uint32_t uartmem_getbaseaddr(void)
{
- return base_port;
+ return uart_platform_base(0);
}
#endif
void uart_init(void)
{
- exynos5_init_dev();
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ exynos5_init_dev(uart);
}
unsigned char uart_rx_byte(void)
{
- return exynos5_uart_rx_byte();
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ return exynos5_uart_rx_byte(uart);
}
void uart_tx_byte(unsigned char data)
{
- exynos5_uart_tx_byte(data);
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ exynos5_uart_tx_byte(uart, data);
}
void uart_tx_flush(void)
{
- exynos5_uart_tx_flush();
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ exynos5_uart_tx_flush(uart);
}
diff --git a/src/cpu/samsung/exynos5420/uart.c b/src/cpu/samsung/exynos5420/uart.c
index d05adcd903..82b1265972 100644
--- a/src/cpu/samsung/exynos5420/uart.c
+++ b/src/cpu/samsung/exynos5420/uart.c
@@ -28,9 +28,6 @@
#define RX_FIFO_FULL_MASK (1 << 8)
#define TX_FIFO_FULL_MASK (1 << 24)
-/* FIXME(dhendrix): exynos5 has 4 UARTs and its functions in u-boot take a
- base_port argument. However console_driver functions do not. */
-static uint32_t base_port = CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
/*
* The coefficient, used to calculate the baudrate on S5P UARTs is
@@ -58,9 +55,8 @@ static const int udivslot[] = {
0xffdf,
};
-static void serial_setbrg_dev(void)
+static void serial_setbrg_dev(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
u32 uclk;
u32 val;
@@ -87,10 +83,8 @@ static void serial_setbrg_dev(void)
* Initialise the serial port with the given baudrate. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*/
-static void exynos5_init_dev(void)
+static void exynos5_init_dev(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
/* enable FIFOs */
writel(0x1, &uart->ufcon);
writel(0, &uart->umcon);
@@ -99,12 +93,11 @@ static void exynos5_init_dev(void)
/* No interrupts, no DMA, pure polling */
writel(0x245, &uart->ucon);
- serial_setbrg_dev();
+ serial_setbrg_dev(uart);
}
-static int exynos5_uart_err_check(int op)
+static int exynos5_uart_err_check(struct s5p_uart *uart, int op)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
unsigned int mask;
/*
@@ -127,14 +120,12 @@ static int exynos5_uart_err_check(int op)
* otherwise. When the function is succesfull, the character read is
* written into its argument c.
*/
-static unsigned char exynos5_uart_rx_byte(void)
+static unsigned char exynos5_uart_rx_byte(struct s5p_uart *uart)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
/* wait for character to arrive */
while (!(readl(&uart->ufstat) & (RX_FIFO_COUNT_MASK |
RX_FIFO_FULL_MASK))) {
- if (exynos5_uart_err_check(0))
+ if (exynos5_uart_err_check(uart, 0))
return 0;
}
@@ -144,41 +135,48 @@ static unsigned char exynos5_uart_rx_byte(void)
/*
* Output a single byte to the serial port.
*/
-static void exynos5_uart_tx_byte(unsigned char data)
+static void exynos5_uart_tx_byte(struct s5p_uart *uart, unsigned char data)
{
- struct s5p_uart *uart = (struct s5p_uart *)base_port;
-
/* wait for room in the tx FIFO */
while ((readl(&uart->ufstat) & TX_FIFO_FULL_MASK)) {
- if (exynos5_uart_err_check(1))
+ if (exynos5_uart_err_check(uart, 1))
return;
}
writeb(data, &uart->utxh);
}
+unsigned int uart_platform_base(int idx)
+{
+ return CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
+}
+
#if !defined(__PRE_RAM__)
uint32_t uartmem_getbaseaddr(void)
{
- return base_port;
+ return uart_platform_base(0);
}
#endif
void uart_init(void)
{
- exynos5_init_dev();
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ exynos5_init_dev(uart);
}
unsigned char uart_rx_byte(void)
{
- return exynos5_uart_rx_byte();
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ return exynos5_uart_rx_byte(uart);
}
void uart_tx_byte(unsigned char data)
{
- exynos5_uart_tx_byte(data);
+ struct s5p_uart *uart = uart_platform_baseptr(0);
+ exynos5_uart_tx_byte(uart, data);
}
void uart_tx_flush(void)
{
+ /* Exynos5250 implements this too. */
}