/*************************************************************************/ /**
																			 *****************************************************************************
																			 * @file   tty.h
																			 * @brief
																			 * @author Forrest Y. Yu
																			 * @date   2005
																			 *****************************************************************************
																			 *****************************************************************************/

/**********************************************************
 *	tty.h       //added by mingxuan 2019-5-17
 ***********************************************************/

#ifndef _ORANGES_TTY_H_
#define _ORANGES_TTY_H_
#include "type.h"

#define TTY_IN_BYTES 256  /* tty input queue size */
#define TTY_OUT_BUF_LEN 2 /* tty output buffer size */

/*  TTY state (3bit)
	wait_enter  wait_space  display
		1/0        1/0        1/0
*/

#define TTY_STATE_WAIT_ENTER 4 /*100*/
#define TTY_STATE_WAIT_SPACE 2 /*010*/
#define TTY_STATE_DISPLAY 1	   /*001*/

typedef struct n_tty
{
	int driver_type; // 1-vga&kbd; 2-serial
	void *input_buf;
	void *output_buf;
	void (*write)(struct n_tty *tty, char ch);
	int (*read)(struct n_tty *tty, char* buf, int nr);
	void (*recvbuf)(struct n_tty *tty, u32 ch);
	int (*ioctl)(struct n_tty *tty, u32 cmd, long arg);
} NTTY;

enum CSI_state
{
	CSI_ESC,
	CSI_BRACKET,
	CSI_PARAM1,
	CSI_PARAM2
};
typedef struct vga_buf
{
	void *buf;		  // 2d array, screen size, for text mode it's [maxline][80]
	int max_line;	  // to support scroll, max line should be a lot more than screen
	int scr_top_line; // the index in buf of top line on screen;
	int scr_cur_line; // the index in buf of the cursor's line;
	int scr_bot_line; // the index in buf of the most-bottom printed line
	int head_line;	  // for circular buffer use
	int cur_row;
	int cur_col; // cursor position, on screen

	bool Is2param;
	enum CSI_state CSI;
	i16 param1; // the first param of CSI
	i16 param2; // the second of CSI
	u16 color;
} vga_buf;

typedef struct keyboard_buf
{
	void *buf; // 1d array, buffer input virtual line, works as a ldisc
	int tail;
	int head;
	int len;
	int readable;
} keyboard_buf;

typedef struct serial_buf
{
	void *buf;
	int tail;
	int head;
	int len;
	int readable;
} serial_buf;

#include "console.h"

NTTY *get_tty(const int nr_tty);

void vga_tty_init(NTTY *tty);
void vga_tty_write(NTTY *tty, char ch);
void vga_tty_flush(NTTY *tty);
void vga_tty_scroll(NTTY *tty, int direction);
void vga_tty_select(NTTY *tty);

void ps2_tty_init(NTTY *tty);
int ps2_tty_read(NTTY *tty, char *buf, int nr);
void ps2_tty_recvbuf(NTTY *tty, u32 key);

#define CYCLE_SUB(head, tail, _max) ((head) <= (tail) ? (tail) - (head) : (tail) + (_max) - (head))
#define NEXT(x, _max) (((x) + 1) % (_max))
#define LAST(x, _max) (((x)-1) >= 0 ? ((x)-1) % (_max) : (_max)-1)

#define FOREGROUND(color) ((u16)(color & 0xf) << 8)
#define BACKGROUND(color) ((u16)(color & 0xf) << 12)

// extern int cur_ntty;
extern NTTY *cur_ntty;
// extern NTTY ntty_table[3];

#define IOCTL_CMD_TTY_SCROLL 1
#define IOCTL_CMD_TTY_SELECTCON 2
#define IOCTL_CMD_TTY_FLUSH 3

#define TTY_SCROLL_UP		1
#define TTY_SCROLL_DOWN		2
#define TTY_SCROLL_TOCUR	3

#endif /* _ORANGES_TTY_H_ */