ben-blinkenlights/ubb-vga/ubb-vga.h

/*
 * ubb-vga.h - Output video on UBB with more or less VGA timing
 *
 * Written 2011 by Werner Almesberger
 * Copyright 2011 Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#ifndef UBB_VGA_H
#define	UBB_VGA_H

#include <stdint.h>
#include <sys/types.h>


#define	R_VAL	(1 << 3)
#define	G_VAL	(1 << 0)
#define	B_VAL	(1 << 1)
#define	Y_VAL	(1 << 2)


struct mode {
	const char *name;	/* NULL for end of table */
	int xres, yres;
	int clkdiv;		/* pixel clock = 336 MHz/(clkdiv+1) */
	int vsync_lines;	/* 2 lines, for official VGA */
	int vfront_lines;	/* 32 lines */
	int vback_lines;	/* 14 lines */
	uint16_t hsync_cycles;	/* 3.77 us */
	uint16_t hback_cycles;	/* 0.79 us */
	uint16_t line_cycles;	/* 31.77 us */
};

extern const struct mode *mode;


void *map(off_t addr, size_t size);


#define	CYCLES(cy)	((cy)/112.0)


/* ccube.c */

uint8_t ccube_map(uint8_t r, uint8_t g, uint8_t b);
void ccube_init(void);

/* physmem.c */

void **calloc_phys_vec(size_t n, size_t size);
unsigned long *xlat_virt(void *const *v, size_t n);

/* grabfb.c */

void grabfb(void **f, int xres, int yres);

/* tstimg.c */

void tstimg(void **f, int xres, int yres);

/* ppmimg.c */

extern char *img_name;

void ppmimg(void **f, int xres, int yres);

#endif /* !UBB_VGA_H */