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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>
This commit is contained in:
Kyösti Mälkki 2014-02-24 20:51:30 +02:00 committed by Patrick Georgi
parent e5760af398
commit c2610a4a18
5 changed files with 74 additions and 70 deletions
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50
src/cpu/samsung/exynos5250/uart.c
View File

@ -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);
}

44
src/cpu/samsung/exynos5420/uart.c
View File

@ -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. */
}

30
src/cpu/ti/am335x/uart.c
View File

@ -35,10 +35,8 @@
* Initialise the serial port with the given baudrate divisor. The settings
* are always 8 data bits, no parity, 1 stop bit, no start bits.
*/
static void am335x_uart_init(uint16_t div)
static void am335x_uart_init(struct am335x_uart *uart, uint16_t div)
{
struct am335x_uart *uart = (struct am335x_uart *)
CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
uint16_t lcr_orig, efr_orig, mcr_orig;
/* reset the UART */
@ -131,11 +129,8 @@ static void am335x_uart_init(uint16_t div)
* otherwise. When the function is successful, the character read is
* written into its argument c.
*/
static unsigned char am335x_uart_rx_byte(void)
static unsigned char am335x_uart_rx_byte(struct am335x_uart *uart)
{
struct am335x_uart *uart =
(struct am335x_uart *)CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
while (!(read16(&uart->lsr) & LSR_RXFIFOE));
return read8(&uart->rhr);
@ -144,11 +139,8 @@ static unsigned char am335x_uart_rx_byte(void)
/*
* Output a single byte to the serial port.
*/
static void am335x_uart_tx_byte(unsigned char data)
static void am335x_uart_tx_byte(struct am335x_uart *uart, unsigned char data)
{
struct am335x_uart *uart =
(struct am335x_uart *)CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
while (!(read16(&uart->lsr) & LSR_TXFIFOE));
return write8(data, &uart->thr);
@ -159,28 +151,36 @@ unsigned int uart_platform_refclk(void)
return 48000000;
}
unsigned int uart_platform_base(int idx)
{
return CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
}
#if !defined(__PRE_RAM__)
uint32_t uartmem_getbaseaddr(void)
{
return CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
return uart_platform_base(0);
}
#endif
void uart_init(void)
{
struct am335x_uart *uart = uart_platform_baseptr(0);
uint16_t div = (uint16_t) uart_baudrate_divisor(
default_baudrate(), uart_platform_refclk(), 16);
am335x_uart_init(div);
am335x_uart_init(uart, div);
}
unsigned char uart_rx_byte(void)
{
return am335x_uart_rx_byte();
struct am335x_uart *uart = uart_platform_baseptr(0);
return am335x_uart_rx_byte(uart);
}
void uart_tx_byte(unsigned char data)
{
am335x_uart_tx_byte(data);
struct am335x_uart *uart = uart_platform_baseptr(0);
am335x_uart_tx_byte(uart, data);
}
void uart_tx_flush(void)

13
src/drivers/uart/pl011.c
View File

@ -15,12 +15,14 @@
#include <console/uart.h>
static void pl011_uart_tx_byte(unsigned char data)
static void pl011_uart_tx_byte(unsigned int *uart_base, unsigned char data)
{
static volatile unsigned int *uart0_address =
(unsigned int *) CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
*uart_base = (unsigned int)data;
}
*uart0_address = (unsigned int)data;
unsigned int uart_platform_base(int idx)
{
return CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
}
#if !defined(__PRE_RAM__)
@ -36,7 +38,8 @@ void uart_init(void)
void uart_tx_byte(unsigned char data)
{
pl011_uart_tx_byte(data);
unsigned int *uart_base = uart_platform_baseptr(0);
pl011_uart_tx_byte(uart_base, data);
}
void uart_tx_flush(void)

7
src/include/console/uart.h
View File

@ -48,6 +48,13 @@ int uart_can_rx_byte(void);
unsigned int uart_platform_base(int idx);
uint32_t uartmem_getbaseaddr(void);
#if !defined(__ROMCC__)
static inline void *uart_platform_baseptr(int idx)
{
return (void *)uart_platform_base(idx);
}
#endif
void oxford_init(void);
void oxford_remap(unsigned int new_base);