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/*

 * Copyright (c) 2006 Jakub Jermar

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - 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.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.

 */

/** @addtogroup sparc64	

 * @{

 */

/** @file

 */

#include <arch/drivers/scr.h>

#include <genarch/ofw/ofw_tree.h>

#include <genarch/fb/fb.h>

#include <genarch/fb/visuals.h>

#include <arch/types.h>

#include <string.h>

#include <align.h>

#include <print.h>

#define FFB_REG_24BPP	7

scr_type_t scr_type = SCR_UNKNOWN;

/** Initialize screen.

 *

 * Traverse OpenFirmware device tree in order to find necessary

 * info about the screen device.

 *

 * @param node Screen device node.

 */

void scr_init(ofw_tree_node_t *node)

{

	ofw_tree_property_t *prop;

	ofw_pci_reg_t *pci_reg;

	ofw_pci_reg_t pci_abs_reg;

	ofw_upa_reg_t *upa_reg;

	ofw_sbus_reg_t *sbus_reg;

	const char *name;

	name = ofw_tree_node_name(node);

	if (strcmp(name, "SUNW,m64B") == 0)

		scr_type = SCR_ATYFB;

	else if (strcmp(name, "SUNW,XVR-100") == 0)

		scr_type = SCR_XVR;

	else if (strcmp(name, "SUNW,ffb") == 0)

		scr_type = SCR_FFB;

	else if (strcmp(name, "cgsix") == 0)

		scr_type = SCR_CGSIX;

	if (scr_type == SCR_UNKNOWN) {

		printf("Unknown screen device.\n");

		return;

	}

	uintptr_t fb_addr;

	unsigned int fb_offset = 0;

	uint32_t fb_width = 0;

	uint32_t fb_height = 0;

	uint32_t fb_depth = 0;

	uint32_t fb_linebytes = 0;

	uint32_t fb_scanline = 0;

	unsigned int visual;

	prop = ofw_tree_getprop(node, "width");

	if (prop && prop->value)

		fb_width = *((uint32_t *) prop->value);

	prop = ofw_tree_getprop(node, "height");

	if (prop && prop->value)

		fb_height = *((uint32_t *) prop->value);

	prop = ofw_tree_getprop(node, "depth");

	if (prop && prop->value)

		fb_depth = *((uint32_t *) prop->value);

	prop = ofw_tree_getprop(node, "linebytes");

	if (prop && prop->value)

		fb_linebytes = *((uint32_t *) prop->value);

	prop = ofw_tree_getprop(node, "reg");

	if (!prop)

		panic("Cannot find 'reg' property.");

	switch (scr_type) {

	case SCR_ATYFB:

		if (prop->size / sizeof(ofw_pci_reg_t) < 2) {

			printf("Too few screen registers.\n");

			return;

		}

		pci_reg = &((ofw_pci_reg_t *) prop->value)[1];

		if (!ofw_pci_reg_absolutize(node, pci_reg, &pci_abs_reg)) {

			printf("Failed to absolutize fb register.\n");

			return;

		}

		if (!ofw_pci_apply_ranges(node->parent, &pci_abs_reg,

		    &fb_addr)) {

			printf("Failed to determine screen address.\n");

			return;

		}

		switch (fb_depth) {

		case 8:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_INDIRECT_8;

			break;

		case 16:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_RGB_5_6_5;

			break;

		case 24:

			fb_scanline = fb_linebytes * 4;

			visual = VISUAL_RGB_8_8_8_0;

			break;

		case 32:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_RGB_0_8_8_8;

			break;

		default:

			printf("Unsupported bits per pixel.\n");

			return;

		}

		break;

	case SCR_XVR:

		if (prop->size / sizeof(ofw_pci_reg_t) < 2) {

			printf("Too few screen registers.\n");

			return;

		}

		pci_reg = &((ofw_pci_reg_t *) prop->value)[1];

		if (!ofw_pci_reg_absolutize(node, pci_reg, &pci_abs_reg)) {

			printf("Failed to absolutize fb register.\n");

			return;

		}

		if (!ofw_pci_apply_ranges(node->parent, &pci_abs_reg,

		    &fb_addr)) {

			printf("Failed to determine screen address.\n");

			return;

		}

		fb_offset = 4 * 0x2000;

		switch (fb_depth) {

		case 8:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_INDIRECT_8;

			break;

		case 16:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_RGB_5_6_5;

			break;

		case 24:

			fb_scanline = fb_linebytes * 4;

			visual = VISUAL_RGB_8_8_8_0;

			break;

		case 32:

			fb_scanline = fb_linebytes * (fb_depth >> 3);

			visual = VISUAL_RGB_0_8_8_8;

			break;

		default:

			printf("Unsupported bits per pixel.\n");

			return;

		}

		break;

	case SCR_FFB:	

		fb_scanline = 8192;

		visual = VISUAL_BGR_0_8_8_8;

		upa_reg = &((ofw_upa_reg_t *) prop->value)[FFB_REG_24BPP];

		if (!ofw_upa_apply_ranges(node->parent, upa_reg, &fb_addr)) {

			printf("Failed to determine screen address.\n");

			return;

		}

		break;

	case SCR_CGSIX:

		switch (fb_depth) {

		case 8:

			fb_scanline = fb_linebytes;

			visual = VISUAL_INDIRECT_8;

			break;

		default:

			printf("Not implemented.\n");

			return;

		}

		sbus_reg = &((ofw_sbus_reg_t *) prop->value)[0];

		if (!ofw_sbus_apply_ranges(node->parent, sbus_reg, &fb_addr)) {

			printf("Failed to determine screen address.\n");

			return;

		}

		break;

	default:

		panic("Unexpected type.");

	}

	fb_properties_t props = {

		.addr = fb_addr,

		.offset = fb_offset,

		.x = fb_width,

		.y = fb_height,

		.scan = fb_scanline,

		.visual = visual,

	};

	fb_init(&props);

}

void scr_redraw(void)

{

	fb_redraw();

}

/** @}

 */