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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef CONSOLE_UART_H
#define CONSOLE_UART_H
#include <stdint.h>
/* Return the clock frequency UART uses as reference clock for
* baudrate generator. */
unsigned int uart_platform_refclk(void);
#if CONFIG(UART_OVERRIDE_BAUDRATE)
/* Return the baudrate, define this in your platform when using the above
configuration. */
unsigned int get_uart_baudrate(void);
#else
static inline unsigned int get_uart_baudrate(void)
{
return CONFIG_TTYS0_BAUD;
}
#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
*/
unsigned int uart_baudrate_divisor(unsigned int baudrate,
unsigned int refclk, unsigned int oversample);
/* Returns the oversample divisor multiplied by any other divisors that act
* on the input clock
*/
unsigned int uart_input_clock_divider(void);
/* Bitbang out one byte on an 8n1 UART through the output function set_tx(). */
void uart_bitbang_tx_byte(unsigned char data, void (*set_tx)(int line_state));
void uart_init(unsigned int idx);
void uart_tx_byte(unsigned int idx, unsigned char data);
void uart_tx_flush(unsigned int idx);
unsigned char uart_rx_byte(unsigned int idx);
uintptr_t uart_platform_base(unsigned int idx);
static inline void *uart_platform_baseptr(unsigned int idx)
{
return (void *)uart_platform_base(idx);
}
void oxford_remap(unsigned int new_base);
#define __CONSOLE_SERIAL_ENABLE__ (CONFIG(CONSOLE_SERIAL) && \
(ENV_BOOTBLOCK || ENV_SEPARATE_ROMSTAGE || ENV_RAMSTAGE || ENV_SEPARATE_VERSTAGE \
|| ENV_POSTCAR || (ENV_SMM && CONFIG(DEBUG_SMI))))
#if __CONSOLE_SERIAL_ENABLE__
static inline void __uart_init(void)
{
uart_init(get_uart_for_console());
}
static inline void __uart_tx_byte(u8 data)
{
uart_tx_byte(get_uart_for_console(), data);
}
static inline void __uart_tx_flush(void)
{
uart_tx_flush(get_uart_for_console());
}
#else
static inline void __uart_init(void) {}
static inline void __uart_tx_byte(u8 data) {}
static inline void __uart_tx_flush(void) {}
#endif
#if CONFIG(GDB_STUB) && (ENV_ROMSTAGE_OR_BEFORE || ENV_RAMSTAGE)
#define CONF_UART_FOR_GDB CONFIG_UART_FOR_CONSOLE
static inline void __gdb_hw_init(void) { uart_init(CONF_UART_FOR_GDB); }
static inline void __gdb_tx_byte(u8 data)
{
uart_tx_byte(CONF_UART_FOR_GDB, data);
}
static inline void __gdb_tx_flush(void) { uart_tx_flush(CONF_UART_FOR_GDB); }
static inline u8 __gdb_rx_byte(void)
{
return uart_rx_byte(CONF_UART_FOR_GDB);
}
#endif
#endif /* CONSOLE_UART_H */
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