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  1. /*
  2.  * Copyright (C) 2006 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup sparc64
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #include <arch/drivers/scr.h>
  36. #include <genarch/ofw/ofw_tree.h>
  37. #include <genarch/fb/fb.h>
  38. #include <arch/types.h>
  39. #include <typedefs.h>
  40. #include <func.h>
  41. #include <align.h>
  42. #include <print.h>
  43.  
  44. scr_type_t scr_type = SCR_UNKNOWN;
  45.  
  46. /** Initialize screen.
  47.  *
  48.  * Traverse OpenFirmware device tree in order to find necessary
  49.  * info about the screen device.
  50.  *
  51.  * @param node Screen device node.
  52.  */
  53. void scr_init(ofw_tree_node_t *node)
  54. {
  55.     ofw_tree_property_t *prop;
  56.     const char *name;
  57.    
  58.     name = ofw_tree_node_name(node);
  59.    
  60.     if (strcmp(name, "SUNW,m64B") == 0)
  61.         scr_type = SCR_ATYFB;
  62.     else if (strcmp(name, "SUNW,ffb") == 0)
  63.         scr_type = SCR_FFB;
  64.    
  65.     if (scr_type == SCR_UNKNOWN) {
  66.         printf("Unknown keyboard device.\n");
  67.         return;
  68.     }
  69.    
  70.     uintptr_t fb_addr;
  71.     uint32_t fb_width = 0;
  72.     uint32_t fb_height = 0;
  73.     uint32_t fb_depth = 0;
  74.     uint32_t fb_linebytes = 0;
  75.     uint32_t fb_scanline = 0;
  76.  
  77.     prop = ofw_tree_getprop(node, "width");
  78.     if (prop && prop->value)
  79.         fb_width = *((uint32_t *) prop->value);
  80.  
  81.     prop = ofw_tree_getprop(node, "height");
  82.     if (prop && prop->value)
  83.         fb_height = *((uint32_t *) prop->value);
  84.  
  85.     prop = ofw_tree_getprop(node, "depth");
  86.     if (prop && prop->value)
  87.         fb_depth = *((uint32_t *) prop->value);
  88.  
  89.     prop = ofw_tree_getprop(node, "linebytes");
  90.     if (prop && prop->value)
  91.         fb_linebytes = *((uint32_t *) prop->value);
  92.  
  93.     prop = ofw_tree_getprop(node, "reg");
  94.     if (!prop)
  95.         panic("Can't find \"reg\" property.\n");
  96.  
  97.     switch (scr_type) {
  98.     case SCR_ATYFB:
  99.         if (prop->size / sizeof(ofw_pci_reg_t) < 2) {
  100.             printf("Too few screen registers.\n");
  101.             return;
  102.         }
  103.    
  104.         ofw_pci_reg_t *fb_reg = &((ofw_pci_reg_t *) prop->value)[1];
  105.         ofw_pci_reg_t abs_reg;
  106.        
  107.         if (!ofw_pci_reg_absolutize(node, fb_reg, &abs_reg)) {
  108.             printf("Failed to absolutize fb register.\n");
  109.             return;
  110.         }
  111.    
  112.         if (!ofw_pci_apply_ranges(node->parent, &abs_reg , &fb_addr)) {
  113.             printf("Failed to determine screen address.\n");
  114.             return;
  115.         }
  116.  
  117.         if (fb_depth == 24)
  118.             fb_scanline = fb_linebytes * 4;
  119.         else
  120.             fb_scanline = fb_linebytes * (fb_depth >> 3);
  121.        
  122.         break;
  123.     case SCR_FFB:
  124.     default:
  125.         panic("Unexpected type.\n");
  126.     }
  127.  
  128.     fb_init(fb_addr, fb_width, fb_height, fb_depth, fb_scanline, true);
  129. }
  130.  
  131. /** @}
  132.  */
  133.