source: mainline/kernel/arch/sparc64/src/drivers/scr.c@ a3b5831

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since a3b5831 was 9b35499, checked in by Jakub Jermar <jakub@…>, 18 years ago

Experimental support for the cgsix framebuffer, which is found on old Ultra 1
worksations, and the SBUS bus and devices. Not tested.
  • Property mode set to 100644
File size: 4.7 KB
Line 
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 <func.h>
41#include <align.h>
42#include <print.h>
43
44#define FFB_REG_24BPP 7
45
46scr_type_t scr_type = SCR_UNKNOWN;
47
48/** Initialize screen.
49 *
50 * Traverse OpenFirmware device tree in order to find necessary
51 * info about the screen device.
52 *
53 * @param node Screen device node.
54 */
55void scr_init(ofw_tree_node_t *node)
56{
57 ofw_tree_property_t *prop;
58 const char *name;
59
60 name = ofw_tree_node_name(node);
61
62 if (strcmp(name, "SUNW,m64B") == 0)
63 scr_type = SCR_ATYFB;
64 else if (strcmp(name, "SUNW,ffb") == 0)
65 scr_type = SCR_FFB;
66 else if (strcmp(name, "cgsix") == 0)
67 scr_type = SCR_CGSIX;
68
69 if (scr_type == SCR_UNKNOWN) {
70 printf("Unknown keyboard device.\n");
71 return;
72 }
73
74 uintptr_t fb_addr;
75 uint32_t fb_width = 0;
76 uint32_t fb_height = 0;
77 uint32_t fb_depth = 0;
78 uint32_t fb_linebytes = 0;
79 uint32_t fb_scanline = 0;
80 unsigned int visual;
81
82 prop = ofw_tree_getprop(node, "width");
83 if (prop && prop->value)
84 fb_width = *((uint32_t *) prop->value);
85
86 prop = ofw_tree_getprop(node, "height");
87 if (prop && prop->value)
88 fb_height = *((uint32_t *) prop->value);
89
90 prop = ofw_tree_getprop(node, "depth");
91 if (prop && prop->value)
92 fb_depth = *((uint32_t *) prop->value);
93
94 prop = ofw_tree_getprop(node, "linebytes");
95 if (prop && prop->value)
96 fb_linebytes = *((uint32_t *) prop->value);
97
98 prop = ofw_tree_getprop(node, "reg");
99 if (!prop)
100 panic("Can't find \"reg\" property.\n");
101
102 switch (scr_type) {
103 case SCR_ATYFB:
104 if (prop->size / sizeof(ofw_pci_reg_t) < 2) {
105 printf("Too few screen registers.\n");
106 return;
107 }
108
109 ofw_pci_reg_t *fb_reg = &((ofw_pci_reg_t *) prop->value)[1];
110 ofw_pci_reg_t abs_reg;
111
112 if (!ofw_pci_reg_absolutize(node, fb_reg, &abs_reg)) {
113 printf("Failed to absolutize fb register.\n");
114 return;
115 }
116
117 if (!ofw_pci_apply_ranges(node->parent, &abs_reg , &fb_addr)) {
118 printf("Failed to determine screen address.\n");
119 return;
120 }
121
122 switch (fb_depth) {
123 case 8:
124 fb_scanline = fb_linebytes * (fb_depth >> 3);
125 visual = VISUAL_INDIRECT_8;
126 break;
127 case 16:
128 fb_scanline = fb_linebytes * (fb_depth >> 3);
129 visual = VISUAL_RGB_5_6_5;
130 break;
131 case 24:
132 fb_scanline = fb_linebytes * 4;
133 visual = VISUAL_RGB_8_8_8_0;
134 break;
135 case 32:
136 fb_scanline = fb_linebytes * (fb_depth >> 3);
137 visual = VISUAL_RGB_0_8_8_8;
138 break;
139 default:
140 printf("Unsupported bits per pixel.\n");
141 return;
142 }
143
144 break;
145 case SCR_FFB:
146 fb_scanline = 8192;
147 visual = VISUAL_BGR_0_8_8_8;
148
149 ofw_upa_reg_t *reg = &((ofw_upa_reg_t *) prop->value)[FFB_REG_24BPP];
150 if (!ofw_upa_apply_ranges(node->parent, reg, &fb_addr)) {
151 printf("Failed to determine screen address.\n");
152 return;
153 }
154
155 break;
156 case SCR_CGSIX:
157 switch (fb_depth) {
158 case 8:
159 fb_scanline = fb_linebytes;
160 visual = VISUAL_INDIRECT_8;
161 break;
162 default:
163 printf("Not implemented.\n");
164 return;
165 }
166
167 ofw_sbus_reg_t *cg6_reg = &((ofw_sbus_reg_t *) prop->value)[0];
168 if (!ofw_sbus_apply_ranges(node->parent, cg6_reg, &fb_addr)) {
169 printf("Failed to determine screen address.\n");
170 return;
171 }
172
173 break;
174 default:
175 panic("Unexpected type.\n");
176 }
177
178 fb_init(fb_addr, fb_width, fb_height, fb_scanline, visual);
179}
180
181/** @}
182 */
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