e3a1247b15
The UART index is never negative, so make it unsigned and drop the checks for the index to be non-negative. Change-Id: I64bd60bd2a3b82552cb3ac6524792b9ac6c09a94 Signed-off-by: Felix Held <felix-coreboot@felixheld.de> Reviewed-on: https://review.coreboot.org/c/coreboot/+/45294 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com> Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-by: Furquan Shaikh <furquan@google.com>
89 lines
2.5 KiB
C
89 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef CONSOLE_UART_H
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#define CONSOLE_UART_H
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#include <stdint.h>
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/* Return the clock frequency UART uses as reference clock for
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* baudrate generator. */
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unsigned int uart_platform_refclk(void);
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#if CONFIG(UART_OVERRIDE_BAUDRATE)
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/* Return the baudrate, define this in your platform when using the above
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configuration. */
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unsigned int get_uart_baudrate(void);
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#else
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static inline unsigned int get_uart_baudrate(void)
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{
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return CONFIG_TTYS0_BAUD;
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}
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#endif
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/* Returns the divisor value for a given baudrate.
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* The formula to satisfy is:
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* refclk / divisor = baudrate * oversample
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*/
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unsigned int uart_baudrate_divisor(unsigned int baudrate,
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unsigned int refclk, unsigned int oversample);
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/* Returns the oversample divisor multiplied by any other divisors that act
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* on the input clock
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*/
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unsigned int uart_input_clock_divider(void);
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/* Bitbang out one byte on an 8n1 UART through the output function set_tx(). */
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void uart_bitbang_tx_byte(unsigned char data, void (*set_tx)(int line_state));
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void uart_init(unsigned int idx);
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void uart_tx_byte(unsigned int idx, unsigned char data);
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void uart_tx_flush(unsigned int idx);
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unsigned char uart_rx_byte(unsigned int idx);
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uintptr_t uart_platform_base(unsigned int idx);
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static inline void *uart_platform_baseptr(unsigned int idx)
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{
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return (void *)uart_platform_base(idx);
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}
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void oxford_remap(unsigned int new_base);
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#define __CONSOLE_SERIAL_ENABLE__ (CONFIG(CONSOLE_SERIAL) && \
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(ENV_BOOTBLOCK || ENV_ROMSTAGE || ENV_RAMSTAGE || ENV_SEPARATE_VERSTAGE \
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|| ENV_POSTCAR || (ENV_SMM && CONFIG(DEBUG_SMI))))
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#if __CONSOLE_SERIAL_ENABLE__
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static inline void __uart_init(void)
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{
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uart_init(CONFIG_UART_FOR_CONSOLE);
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}
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static inline void __uart_tx_byte(u8 data)
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{
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uart_tx_byte(CONFIG_UART_FOR_CONSOLE, data);
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}
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static inline void __uart_tx_flush(void)
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{
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uart_tx_flush(CONFIG_UART_FOR_CONSOLE);
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}
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#else
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static inline void __uart_init(void) {}
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static inline void __uart_tx_byte(u8 data) {}
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static inline void __uart_tx_flush(void) {}
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#endif
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#if CONFIG(GDB_STUB) && (ENV_ROMSTAGE || ENV_RAMSTAGE)
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#define CONF_UART_FOR_GDB CONFIG_UART_FOR_CONSOLE
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static inline void __gdb_hw_init(void) { uart_init(CONF_UART_FOR_GDB); }
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static inline void __gdb_tx_byte(u8 data)
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{
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uart_tx_byte(CONF_UART_FOR_GDB, data);
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}
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static inline void __gdb_tx_flush(void) { uart_tx_flush(CONF_UART_FOR_GDB); }
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static inline u8 __gdb_rx_byte(void)
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{
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return uart_rx_byte(CONF_UART_FOR_GDB);
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}
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#endif
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#endif /* CONSOLE_UART_H */
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