include/device/serial.h


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#ifndef _JOVE_DEVICE_SERIAL_H
#define _JOVE_DEVICE_SERIAL_H 1

#include <stdbool.h>
#include <stdint.h>
#include <stddef.h>
#include "klib/spinlock.h"

#define SERIAL_UART_COM1 0x3F8
#define SERIAL_UART_COM2 0x2F8

#define SERIAL_UART_COM_THR(COM)        COM
#define SERIAL_UART_COM_RBR(COM)        COM
#define SERIAL_UART_COM_DLAB_DLL(COM)   COM
#define SERIAL_UART_COM_IER(COM)        (COM + 1)
#define SERIAL_UART_COM_DLAB_DLH(COM)   (COM + 1)
#define SERIAL_UART_COM_IIR(COM)        (COM + 2)
#define SERIAL_UART_COM_FCR(COM)        (COM + 2)
#define SERIAL_UART_COM_LCR(COM)        (COM + 3)
#define SERIAL_UART_COM_MCR(COM)        (COM + 4)
#define SERIAL_UART_COM_LSR(COM)        (COM + 5)
#define SERIAL_UART_COM_MSR(COM)        (COM + 6)
#define SERIAL_UART_COM_SR(COM)         (COM + 7)

typedef struct serial_device
{
    uint16_t com;
    spinlock_t lock;
} serial_dev_t;

extern serial_dev_t COM1;

void serial_setup(void);
serial_dev_t serial_new(uint16_t com);

void serial_set_int(serial_dev_t *dev, bool enable);
void serial_set_baud(serial_dev_t *dev, uint16_t baud);

void serial_set_fcr(serial_dev_t *dev, uint16_t flg);
void serial_set_lcr(serial_dev_t *dev, uint16_t flg);
void serial_set_mcr(serial_dev_t *dev, uint16_t flg);
void serial_set_lsr(serial_dev_t *dev, uint16_t flg);
void serial_set_msr(serial_dev_t *dev, uint16_t flg);

uint8_t serial_line_status(serial_dev_t *dev);
void serial_write(serial_dev_t *dev, const char *s, size_t len);

#endif