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1897 jermar 1
/*
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 * Copyright (C) 2006 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup sparc64
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 * @{
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 */
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/** @file
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 */
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#include <arch/drivers/scr.h>
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#include <genarch/ofw/ofw_tree.h>
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#include <genarch/fb/fb.h>
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#include <arch/types.h>
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#include <typedefs.h>
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#include <func.h>
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#include <align.h>
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#include <print.h>
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1898 jermar 44
#define FFB_REG_24BPP   7
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1897 jermar 46
scr_type_t scr_type = SCR_UNKNOWN;
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/** Initialize screen.
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 *
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 * Traverse OpenFirmware device tree in order to find necessary
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 * info about the screen device.
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 *
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 * @param node Screen device node.
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 */
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void scr_init(ofw_tree_node_t *node)
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{
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    ofw_tree_property_t *prop;
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    const char *name;
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    name = ofw_tree_node_name(node);
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    if (strcmp(name, "SUNW,m64B") == 0)
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        scr_type = SCR_ATYFB;
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    else if (strcmp(name, "SUNW,ffb") == 0)
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        scr_type = SCR_FFB;
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    if (scr_type == SCR_UNKNOWN) {
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        printf("Unknown keyboard device.\n");
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        return;
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    }
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    uintptr_t fb_addr;
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    uint32_t fb_width = 0;
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    uint32_t fb_height = 0;
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    uint32_t fb_depth = 0;
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    uint32_t fb_linebytes = 0;
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    uint32_t fb_scanline = 0;
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    prop = ofw_tree_getprop(node, "width");
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    if (prop && prop->value)
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        fb_width = *((uint32_t *) prop->value);
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    prop = ofw_tree_getprop(node, "height");
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    if (prop && prop->value)
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        fb_height = *((uint32_t *) prop->value);
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    prop = ofw_tree_getprop(node, "depth");
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    if (prop && prop->value)
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        fb_depth = *((uint32_t *) prop->value);
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    prop = ofw_tree_getprop(node, "linebytes");
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    if (prop && prop->value)
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        fb_linebytes = *((uint32_t *) prop->value);
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    prop = ofw_tree_getprop(node, "reg");
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    if (!prop)
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        panic("Can't find \"reg\" property.\n");
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    switch (scr_type) {
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    case SCR_ATYFB:
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        if (prop->size / sizeof(ofw_pci_reg_t) < 2) {
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            printf("Too few screen registers.\n");
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            return;
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        }
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        ofw_pci_reg_t *fb_reg = &((ofw_pci_reg_t *) prop->value)[1];
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        ofw_pci_reg_t abs_reg;
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        if (!ofw_pci_reg_absolutize(node, fb_reg, &abs_reg)) {
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            printf("Failed to absolutize fb register.\n");
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            return;
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        }
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        if (!ofw_pci_apply_ranges(node->parent, &abs_reg , &fb_addr)) {
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            printf("Failed to determine screen address.\n");
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            return;
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        }
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        if (fb_depth == 24)
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            fb_scanline = fb_linebytes * 4;
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        else
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            fb_scanline = fb_linebytes * (fb_depth >> 3);
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        break;
1898 jermar 125
    case SCR_FFB:  
1986 decky 126
        fb_depth = 32;
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        fb_scanline = 8192;
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        ofw_upa_reg_t *reg = &((ofw_upa_reg_t *) prop->value)[FFB_REG_24BPP];
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        if (!ofw_upa_apply_ranges(node->parent, reg, &fb_addr)) {
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            printf("Failed to determine screen address.\n");
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            return;
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        }
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        break;
1897 jermar 136
    default:
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        panic("Unexpected type.\n");
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    }
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    fb_init(fb_addr, fb_width, fb_height, fb_depth, fb_scanline, true);
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}
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/** @}
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 */