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console: Override uart base address 

Add a new CONFIG_OVERRIDE_UART_FOR_CONSOLE token to override the index
of uart port, platform use a get_uart_for_console routine to decide what
index value should be used for console.

Signed-off-by: Bryant Ou <Bryant.Ou.Q@gmail.com>
Change-Id: I2079bd1e5ffa209553383b6aafe3b8724849ba2a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45405
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marc Jones <marc@marcjonesconsulting.com>
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
This commit is contained in:
Bryant Ou 2020-09-14 23:41:41 -07:00 committed by Patrick Georgi
parent 12985c1dd7
commit 0ee920bf64
2 changed files with 25 additions and 3 deletions
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10
src/console/Kconfig
View File

@ -58,6 +58,14 @@ if CONSOLE_SERIAL
comment "device-specific UART"
depends on HAVE_UART_SPECIAL
config OVERRIDE_UART_FOR_CONSOLE
bool
help
Set to "y" when the platform overrides the index of uart port by providing
a get_uart_for_console routine.
if !OVERRIDE_UART_FOR_CONSOLE
config UART_FOR_CONSOLE
int
prompt "Index for UART port to use for console" if !FIXED_UART_FOR_CONSOLE
@ -87,6 +95,8 @@ depends on DRIVERS_UART_8250IO && UART_FOR_CONSOLE = 2
comment "Serial port base address = 0x2e8"
depends on DRIVERS_UART_8250IO && UART_FOR_CONSOLE = 3
endif
config UART_OVERRIDE_BAUDRATE
bool
help

18
src/include/console/uart.h
View File

@ -20,6 +20,18 @@ static inline unsigned int get_uart_baudrate(void)
}
#endif
#if CONFIG(OVERRIDE_UART_FOR_CONSOLE)
/* Return the index of uart port, define this in your platform
* when need to use variables to override the index.
*/
unsigned int get_uart_for_console(void);
#else
static inline unsigned int get_uart_for_console(void)
{
return CONFIG_UART_FOR_CONSOLE;
}
#endif
/* Returns the divisor value for a given baudrate.
* The formula to satisfy is:
* refclk / divisor = baudrate * oversample
@ -56,15 +68,15 @@ void oxford_remap(unsigned int new_base);
#if __CONSOLE_SERIAL_ENABLE__
static inline void __uart_init(void)
{
uart_init(CONFIG_UART_FOR_CONSOLE);
uart_init(get_uart_for_console());
}
static inline void __uart_tx_byte(u8 data)
{
uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data);
uart_tx_byte(get_uart_for_console(), data);
}
static inline void __uart_tx_flush(void)
{
uart_tx_flush(CONFIG_UART_FOR_CONSOLE);
uart_tx_flush(get_uart_for_console());
}
#else
static inline void __uart_init(void) {}