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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();

}

/** @}

 */