summaryrefslogtreecommitdiff
path: root/drivers/video/sm501.c
blob: 283d2d969c9a9149a5c4f6836005d9999ccfbf4d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
/*
 * (C) Copyright 2002
 * Stäubli Faverges - <www.staubli.com>
 * Pierre AUBERT  p.aubert@staubli.com
 *
 * (C) Copyright 2005
 * Martin Krause TQ-Systems GmbH martin.krause@tqs.de
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * Basic video support for SMI SM501 "Voyager" graphic controller
 */

#include <common.h>

#include <video_fb.h>
#include <sm501.h>

#define read8(ptrReg)                \
    *(volatile unsigned char *)(sm501.isaBase + ptrReg)

#define write8(ptrReg,value) \
    *(volatile unsigned char *)(sm501.isaBase + ptrReg) = value

#define read16(ptrReg) \
    (*(volatile unsigned short *)(sm501.isaBase + ptrReg))

#define write16(ptrReg,value) \
    (*(volatile unsigned short *)(sm501.isaBase + ptrReg) = value)

#define read32(ptrReg) \
    (*(volatile unsigned int *)(sm501.isaBase + ptrReg))

#define write32(ptrReg, value) \
    (*(volatile unsigned int *)(sm501.isaBase + ptrReg) = value)

GraphicDevice sm501;

/*-----------------------------------------------------------------------------
 * SmiSetRegs --
 *-----------------------------------------------------------------------------
 */
static void SmiSetRegs (void)
{
	/*
	 * The content of the chipset register depends on the board (clocks,
	 * ...)
	 */
	const SMI_REGS *preg = board_get_regs ();
	while (preg->Index) {
		write32 (preg->Index, preg->Value);
		/*
		 * Insert a delay between
		 */
		udelay (1000);
		preg ++;
	}
}

/*-----------------------------------------------------------------------------
 * video_hw_init --
 *-----------------------------------------------------------------------------
 */
void *video_hw_init (void)
{
	unsigned int *vm, i;

	memset (&sm501, 0, sizeof (GraphicDevice));

	/*
	 * Initialization of the access to the graphic chipset Retreive base
	 * address of the chipset (see board/RPXClassic/eccx.c)
	 */
	if ((sm501.isaBase = board_video_init ()) == 0) {
		return (NULL);
	}

	if ((sm501.frameAdrs = board_video_get_fb ()) == 0) {
		return (NULL);
	}

	sm501.winSizeX = board_get_width ();
	sm501.winSizeY = board_get_height ();

#if defined(CONFIG_VIDEO_SM501_8BPP)
	sm501.gdfIndex = GDF__8BIT_INDEX;
	sm501.gdfBytesPP = 1;

#elif defined(CONFIG_VIDEO_SM501_16BPP)
	sm501.gdfIndex = GDF_16BIT_565RGB;
	sm501.gdfBytesPP = 2;

#elif defined(CONFIG_VIDEO_SM501_32BPP)
	sm501.gdfIndex = GDF_32BIT_X888RGB;
	sm501.gdfBytesPP = 4;
#else
#error Unsupported SM501 BPP
#endif

	sm501.memSize = sm501.winSizeX * sm501.winSizeY * sm501.gdfBytesPP;

	/* Load Smi registers */
	SmiSetRegs ();

	/* (see board/RPXClassic/RPXClassic.c) */
	board_validate_screen (sm501.isaBase);

	/* Clear video memory */
	i = sm501.memSize/4;
	vm = (unsigned int *)sm501.frameAdrs;
	while(i--)
		*vm++ = 0;

	return (&sm501);
}

/*-----------------------------------------------------------------------------
 * video_set_lut --
 *-----------------------------------------------------------------------------
 */
void video_set_lut (
	unsigned int index,           /* color number */
	unsigned char r,              /* red */
	unsigned char g,              /* green */
	unsigned char b               /* blue */
	)
{
}