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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2011 Marcin Bukat
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "kernel.h"
#include "lcd.h"
#include "system.h"
#include "cpu.h"
#include "lcdif-rk27xx.h"
unsigned int lcd_data_transform(unsigned int data)
{
unsigned int r, g, b;
#if defined(RK27_GENERIC)
/* 18 bit interface */
r = (data & 0x0000fc00)<<8;
/* g = ((data & 0x00000300) >> 2) | ((data & 0x000000e0) >> 3); */
g = ((data & 0x00000300) << 6) | ((data & 0x000000e0) << 5);
b = (data & 0x00000001f) << 3;
#elif defined(HM60X) || defined(HM801)
/* 16 bit interface */
r = (data & 0x0000f800) << 8;
g = (data & 0x000007e0) << 5;
b = (data & 0x0000001f) << 3;
#else
#error "Unknown target"
#endif
return (r | g | b);
}
void lcd_cmd(unsigned int cmd)
{
LCD_COMMAND = lcd_data_transform(cmd);
}
void lcd_data(unsigned int data)
{
LCD_DATA = lcd_data_transform(data);
}
void lcd_write_reg(unsigned int reg, unsigned int val)
{
lcd_cmd(reg);
lcd_data(val);
}
static void lcdctrl_bypass(unsigned int on_off)
{
while (!(LCDC_STA & LCDC_MCU_IDLE));
if (on_off)
MCU_CTRL |= MCU_CTRL_BYPASS;
else
MCU_CTRL &= ~MCU_CTRL_BYPASS;
}
/* This part is unclear. I am unable to use buffered/FIFO based writes
* to lcd. Depending on settings of IF I get various patterns on display
* but not what I want to display apparently.
*/
static void lcdctrl_init(void)
{
/* alpha b111
* stop at current frame complete
* MCU mode
* 24b RGB
*/
LCDC_CTRL = ALPHA(7) | LCDC_STOP | LCDC_MCU | RGB24B;
MCU_CTRL = ALPHA_BASE(0x3f) | MCU_CTRL_BYPASS;
HOR_ACT = LCD_WIDTH + 3; /* define horizonatal active region */
VERT_ACT = LCD_HEIGHT; /* define vertical active region */
VERT_PERIOD = 0xfff; /* CSn/WEn/RDn signal timings */
LINE0_YADDR = LINE_ALPHA_EN | 0x7fe;
LINE1_YADDR = LINE_ALPHA_EN | ((1 * LCD_WIDTH) - 2);
LINE2_YADDR = LINE_ALPHA_EN | ((2 * LCD_WIDTH) - 2);
LINE3_YADDR = LINE_ALPHA_EN | ((3 * LCD_WIDTH) - 2);
LINE0_UVADDR = 0x7fe + 1;
LINE1_UVADDR = ((1 * LCD_WIDTH) - 2 + 1);
LINE2_UVADDR = ((2 * LCD_WIDTH) - 2 + 1);
LINE3_UVADDR = ((3 * LCD_WIDTH) - 2 + 1);
#if 0
LINE0_YADDR = 0;
LINE1_YADDR = (1 * LCD_WIDTH);
LINE2_YADDR = (2 * LCD_WIDTH);
LINE3_YADDR = (3 * LCD_WIDTH);
LINE0_UVADDR = 1;
LINE1_UVADDR = (1 * LCD_WIDTH) + 1;
LINE2_UVADDR = (2 * LCD_WIDTH) + 1;
LINE3_UVADDR = (3 * LCD_WIDTH) + 1;
START_X = 0;
START_Y = 0;
DELTA_X = 0x200; /* no scaling */
DELTA_Y = 0x200; /* no scaling */
#endif
LCDC_INTR_MASK = INTR_MASK_LINE; /* INTR_MASK_EVENLINE; */
}
/* configure pins to drive lcd in 18bit mode */
static void iomux_lcd(void)
{
unsigned long muxa;
muxa = SCU_IOMUXA_CON & ~(IOMUX_LCD_VSYNC|IOMUX_LCD_DEN|0xff);
muxa |= IOMUX_LCD_D18|IOMUX_LCD_D20|IOMUX_LCD_D22|IOMUX_LCD_D17|IOMUX_LCD_D16;
SCU_IOMUXA_CON = muxa;
SCU_IOMUXB_CON |= IOMUX_LCD_D815;
}
void lcd_init_device()
{
iomux_lcd(); /* setup pins for 16bit lcd interface */
lcdctrl_init(); /* basic lcdc module configuration */
lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */
lcd_display_init();
}
/* This is ugly hack. We drive lcd in bypass mode
* where all writes goes directly to lcd controller.
* This is suboptimal at best. IF module povides
* FIFO, internal sram buffer, hardware scaller,
* DMA signals, hardware alpha blending and more.
* BUT the fact is that I have no idea how to use
* this modes. Datasheet floating around is very
* unclean in this regard and OF uses ackward
* lcd update routines which are hard to understand.
* Moreover OF sets some bits in IF module registers
* which are referred as reseved in datasheet.
*/
void lcd_update()
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
|
