tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
3 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
4 * Copyright 2010 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public
8 * License as published by the Free Software Foundation;
9 * either version 2, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
13 * the implied warranty of MERCHANTABILITY or FITNESS FOR
14 * A PARTICULAR PURPOSE.See the GNU General Public License
15 * for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc.,
20 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 */
22/*
23 * basic modesetting functions
24 */
25
26#include <linux/kernel.h>
27#include <linux/via-core.h>
28#include "via_modesetting.h"
29#include "share.h"
30#include "debug.h"
31
32void via_set_primary_address(u32 addr)
33{
34 DEBUG_MSG(KERN_DEBUG "via_set_primary_address(0x%08X)\n", addr);
35 via_write_reg(VIACR, 0x0D, addr & 0xFF);
36 via_write_reg(VIACR, 0x0C, (addr >> 8) & 0xFF);
37 via_write_reg(VIACR, 0x34, (addr >> 16) & 0xFF);
38 via_write_reg_mask(VIACR, 0x48, (addr >> 24) & 0x1F, 0x1F);
39}
40
41void via_set_secondary_address(u32 addr)
42{
43 DEBUG_MSG(KERN_DEBUG "via_set_secondary_address(0x%08X)\n", addr);
44 /* secondary display supports only quadword aligned memory */
45 via_write_reg_mask(VIACR, 0x62, (addr >> 2) & 0xFE, 0xFE);
46 via_write_reg(VIACR, 0x63, (addr >> 10) & 0xFF);
47 via_write_reg(VIACR, 0x64, (addr >> 18) & 0xFF);
48 via_write_reg_mask(VIACR, 0xA3, (addr >> 26) & 0x07, 0x07);
49}
50
51void via_set_primary_pitch(u32 pitch)
52{
53 DEBUG_MSG(KERN_DEBUG "via_set_primary_pitch(0x%08X)\n", pitch);
54 /* spec does not say that first adapter skips 3 bits but old
55 * code did it and seems to be reasonable in analogy to 2nd adapter
56 */
57 pitch = pitch >> 3;
58 via_write_reg(VIACR, 0x13, pitch & 0xFF);
59 via_write_reg_mask(VIACR, 0x35, (pitch >> (8 - 5)) & 0xE0, 0xE0);
60}
61
62void via_set_secondary_pitch(u32 pitch)
63{
64 DEBUG_MSG(KERN_DEBUG "via_set_secondary_pitch(0x%08X)\n", pitch);
65 pitch = pitch >> 3;
66 via_write_reg(VIACR, 0x66, pitch & 0xFF);
67 via_write_reg_mask(VIACR, 0x67, (pitch >> 8) & 0x03, 0x03);
68 via_write_reg_mask(VIACR, 0x71, (pitch >> (10 - 7)) & 0x80, 0x80);
69}
70
71void via_set_primary_color_depth(u8 depth)
72{
73 u8 value;
74
75 DEBUG_MSG(KERN_DEBUG "via_set_primary_color_depth(%d)\n", depth);
76 switch (depth) {
77 case 8:
78 value = 0x00;
79 break;
80 case 15:
81 value = 0x04;
82 break;
83 case 16:
84 value = 0x14;
85 break;
86 case 24:
87 value = 0x0C;
88 break;
89 case 30:
90 value = 0x08;
91 break;
92 default:
93 printk(KERN_WARNING "via_set_primary_color_depth: "
94 "Unsupported depth: %d\n", depth);
95 return;
96 }
97
98 via_write_reg_mask(VIASR, 0x15, value, 0x1C);
99}
100
101void via_set_secondary_color_depth(u8 depth)
102{
103 u8 value;
104
105 DEBUG_MSG(KERN_DEBUG "via_set_secondary_color_depth(%d)\n", depth);
106 switch (depth) {
107 case 8:
108 value = 0x00;
109 break;
110 case 16:
111 value = 0x40;
112 break;
113 case 24:
114 value = 0xC0;
115 break;
116 case 30:
117 value = 0x80;
118 break;
119 default:
120 printk(KERN_WARNING "via_set_secondary_color_depth: "
121 "Unsupported depth: %d\n", depth);
122 return;
123 }
124
125 via_write_reg_mask(VIACR, 0x67, value, 0xC0);
126}