1#ifndef UART8250_H 2#define UART8250_H 3 4/* Base Address */ 5#if defined(CONFIG_CONSOLE_SERIAL_COM1) 6#define TTYSx_BASE 0x3f8 7#elif defined(CONFIG_CONSOLE_SERIAL_COM2) 8#define TTYSx_BASE 0x2f8 9#else 10#define TTYSx_BASE 0x3f8 11#warning no serial port set 12#endif 13 14#if defined(CONFIG_CONSOLE_SERIAL_115200) 15#define TTYSx_BAUD 115200 16#elif defined(CONFIG_CONSOLE_SERIAL_57600) 17#define TTYSx_BAUD 57600 18#elif defined(CONFIG_CONSOLE_SERIAL_38400) 19#define TTYSx_BAUD 38400 20#elif defined(CONFIG_CONSOLE_SERIAL_19200) 21#define TTYSx_BAUD 19200 22#elif defined(CONFIG_CONSOLE_SERIAL_9600) 23#define TTYSx_BAUD 9600 24#else // default 25#define TTYSx_BAUD 115200 26#warning no serial speed set 27#endif 28 29#if ((115200%TTYSx_BAUD) != 0) 30#error Bad ttyS0 baud rate 31#endif 32 33#define TTYSx_DIV (115200/TTYSx_BAUD) 34 35/* Line Control Settings */ 36#ifndef TTYSx_LCS 37/* Set 8bit, 1 stop bit, no parity */ 38#define TTYSx_LCS 0x3 39#endif 40 41#define UART_LCS TTYSx_LCS 42 43unsigned char uart8250_rx_byte(unsigned base_port); 44int uart8250_can_rx_byte(unsigned base_port); 45void uart8250_tx_byte(unsigned base_port, unsigned char data); 46void uart8250_init(unsigned base_port, unsigned divisor, unsigned lcs); 47 48#endif /* UART8250_H */ 49