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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 <genarch/fb/visuals.h>
  39. #include <arch/types.h>
  40. #include <typedefs.h>
  41. #include <func.h>
  42. #include <align.h>
  43. #include <print.h>
  44.  
  45. #define FFB_REG_24BPP   7
  46.  
  47. scr_type_t scr_type = SCR_UNKNOWN;
  48.  
  49. /** Initialize screen.
  50.  *
  51.  * Traverse OpenFirmware device tree in order to find necessary
  52.  * info about the screen device.
  53.  *
  54.  * @param node Screen device node.
  55.  */
  56. void scr_init(ofw_tree_node_t *node)
  57. {
  58.     ofw_tree_property_t *prop;
  59.     const char *name;
  60.    
  61.     name = ofw_tree_node_name(node);
  62.    
  63.     if (strcmp(name, "SUNW,m64B") == 0)
  64.         scr_type = SCR_ATYFB;
  65.     else if (strcmp(name, "SUNW,ffb") == 0)
  66.         scr_type = SCR_FFB;
  67.    
  68.     if (scr_type == SCR_UNKNOWN) {
  69.         printf("Unknown keyboard device.\n");
  70.         return;
  71.     }
  72.    
  73.     uintptr_t fb_addr;
  74.     uint32_t fb_width = 0;
  75.     uint32_t fb_height = 0;
  76.     uint32_t fb_depth = 0;
  77.     uint32_t fb_linebytes = 0;
  78.     uint32_t fb_scanline = 0;
  79.     unsigned int visual;
  80.  
  81.     prop = ofw_tree_getprop(node, "width");
  82.     if (prop && prop->value)
  83.         fb_width = *((uint32_t *) prop->value);
  84.  
  85.     prop = ofw_tree_getprop(node, "height");
  86.     if (prop && prop->value)
  87.         fb_height = *((uint32_t *) prop->value);
  88.  
  89.     prop = ofw_tree_getprop(node, "depth");
  90.     if (prop && prop->value)
  91.         fb_depth = *((uint32_t *) prop->value);
  92.  
  93.     prop = ofw_tree_getprop(node, "linebytes");
  94.     if (prop && prop->value)
  95.         fb_linebytes = *((uint32_t *) prop->value);
  96.  
  97.     prop = ofw_tree_getprop(node, "reg");
  98.     if (!prop)
  99.         panic("Can't find \"reg\" property.\n");
  100.  
  101.     switch (scr_type) {
  102.     case SCR_ATYFB:
  103.         if (prop->size / sizeof(ofw_pci_reg_t) < 2) {
  104.             printf("Too few screen registers.\n");
  105.             return;
  106.         }
  107.    
  108.         ofw_pci_reg_t *fb_reg = &((ofw_pci_reg_t *) prop->value)[1];
  109.         ofw_pci_reg_t abs_reg;
  110.        
  111.         if (!ofw_pci_reg_absolutize(node, fb_reg, &abs_reg)) {
  112.             printf("Failed to absolutize fb register.\n");
  113.             return;
  114.         }
  115.    
  116.         if (!ofw_pci_apply_ranges(node->parent, &abs_reg , &fb_addr)) {
  117.             printf("Failed to determine screen address.\n");
  118.             return;
  119.         }
  120.        
  121.         switch (fb_depth) {
  122.         case 8:
  123.             fb_scanline = fb_linebytes * (fb_depth >> 3);
  124.             visual = VISUAL_INDIRECT_8;
  125.             break;
  126.         case 16:
  127.             fb_scanline = fb_linebytes * (fb_depth >> 3);
  128.             visual = VISUAL_RGB_5_6_5;
  129.             break;
  130.         case 24:
  131.             fb_scanline = fb_linebytes * 4;
  132.             visual = VISUAL_RGB_8_8_8_0;
  133.             break;
  134.         case 32:
  135.             fb_scanline = fb_linebytes * (fb_depth >> 3);
  136.             visual = VISUAL_RGB_0_8_8_8;
  137.             break;
  138.         default:
  139.             printf("Unsupported bits per pixel.\n");
  140.             return;
  141.         }
  142.        
  143.         break;
  144.     case SCR_FFB:  
  145.         fb_scanline = 8192;
  146.         visual = VISUAL_BGR_0_8_8_8;
  147.  
  148.         ofw_upa_reg_t *reg = &((ofw_upa_reg_t *) prop->value)[FFB_REG_24BPP];
  149.         if (!ofw_upa_apply_ranges(node->parent, reg, &fb_addr)) {
  150.             printf("Failed to determine screen address.\n");
  151.             return;
  152.         }
  153.  
  154.         break;
  155.     default:
  156.         panic("Unexpected type.\n");
  157.     }
  158.  
  159.     fb_init(fb_addr, fb_width, fb_height, fb_scanline, visual);
  160. }
  161.  
  162. /** @}
  163.  */
  164.