/*-
 * Copyright (c) 2014 Nathan Whitehorn
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD: head/sys/dev/vt/hw/ofwfb/ofwfb.c 268350 2014-07-07 00:12:18Z nwhitehorn $");

#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/fbio.h>

#include <dev/vt/vt.h>
#include <dev/vt/hw/fb/vt_fb.h>
#include <dev/vt/colors/vt_termcolors.h>

#include <machine/bus.h>
#include <machine/bus_private.h>

#include <dev/ofw/openfirm.h>
#include "creatorreg.h"

static vd_probe_t	creatorfb_probe;
static vd_init_t	creatorfb_init;

static const struct vt_driver vt_creatorfb_driver = {
	.vd_name	= "creatorfb",
	.vd_probe	= creatorfb_probe,
	.vd_init	= creatorfb_init,
	.vd_blank	= vt_fb_blank,
	.vd_bitbltchr	= vt_fb_bitbltchr,
	.vd_maskbitbltchr = vt_fb_maskbitbltchr,
	.vd_fb_ioctl	= vt_fb_ioctl,
	.vd_fb_mmap	= vt_fb_mmap,
	.vd_priority	= VD_PRIORITY_SPECIFIC
};

static struct fb_info creatorfb_conssoftc;
VT_DRIVER_DECLARE(vt_creatorfb, vt_creatorfb_driver);

static int
creatorfb_probe(struct vt_device *vd)
{
	phandle_t chosen, node;
	ihandle_t stdout;
	char type[64], name[64];

OF_printf("%s: %d\n", __FILE__, __LINE__);
	chosen = OF_finddevice("/chosen");
	OF_getprop(chosen, "stdout", &stdout, sizeof(stdout));
	node = OF_instance_to_package(stdout);
	if (node == -1) {
		/*
		 * The "/chosen/stdout" does not exist try
		 * using "screen" directly.
		 */
		node = OF_finddevice("screen");
	}
	OF_getprop(node, "device_type", type, sizeof(type));
	if (strcmp(type, "display") != 0)
		return (CN_DEAD);

	OF_getprop(node, "name", name, sizeof(name));
	if (strcmp(name, "SUNW,ffb") != 0 && strcmp(name, "SUNW,afb") != 0)
		return (CN_DEAD);
OF_printf("%s: %d\n", __FILE__, __LINE__);

	/* Looks OK... */
	return (CN_INTERNAL);
}

static int
creatorfb_init(struct vt_device *vd)
{
	struct fb_info *sc;
	phandle_t chosen;
	phandle_t node;
	ihandle_t handle;
	uint32_t height, width;
	static struct bus_space_tag ofwfb_memt[1];
	char type[64], name[64];
	bus_addr_t phys;
	int space;

	/* Initialize softc */
	vd->vd_softc = sc = &creatorfb_conssoftc;
OF_printf("%s: %d\n", __FILE__, __LINE__);

	chosen = OF_finddevice("/chosen");
	OF_getprop(chosen, "stdout", &handle, sizeof(ihandle_t));
	node = OF_instance_to_package(handle);
	if (node == -1) {
		/*
		 * The "/chosen/stdout" does not exist try
		 * using "screen" directly.
		 */
		node = OF_finddevice("screen");
		handle = OF_open("screen");
	}
	OF_getprop(node, "device_type", type, sizeof(type));
	if (strcmp(type, "display") != 0)
		return (CN_DEAD);

OF_printf("%s: %d\n", __FILE__, __LINE__);
	OF_getprop(node, "name", name, sizeof(name));
	if (strcmp(name, "SUNW,ffb") != 0 && strcmp(name, "SUNW,afb") != 0)
		return (CN_DEAD);

OF_printf("%s: %d\n", __FILE__, __LINE__);
	/* Make sure we have needed properties */
	if (OF_getproplen(node, "height") != sizeof(height) ||
	    OF_getproplen(node, "width") != sizeof(width))
		return (CN_DEAD);

OF_printf("%s: %d\n", __FILE__, __LINE__);
	OF_getprop(node, "height", &height, sizeof(height));
	OF_getprop(node, "width", &width, sizeof(width));

	sc->fb_height = height;
	sc->fb_width = width;
	sc->fb_bpp = sc->fb_depth = 32;
	sc->fb_stride = 8192; /* Fixed */
	sc->fb_size = sc->fb_height * sc->fb_stride;

	/* Map linear framebuffer */
	if (OF_decode_addr(node, FFB_DFB24, &space, &phys) != 0)
		return (CN_DEAD);
	sc->fb_vbase = sparc64_fake_bustag(space, phys, &ofwfb_memt[0]);
	sc->fb_pbase = phys;

OF_printf("%s: %d\n", __FILE__, __LINE__);
{ int i, j;
for (i = 0; i < sc->fb_height; i++)
for (j = 0; j < sc->fb_width; j++)
	bus_space_write_4(&ofwfb_memt[0], sc->fb_vbase, i*sc->fb_stride + j*4, 0);
}
	/* 32-bit VGA palette */
	vt_generate_vga_palette(sc->fb_cmap, COLOR_FORMAT_RGB, 255, 0, 255, 8,
	    255, 16);

	fb_probe(sc);
	vt_fb_init(vd);

	/* Clear the screen. */
	vt_fb_blank(vd, TC_BLACK);

	return (CN_INTERNAL);
}