| /* 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_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 */ |