diff options
Diffstat (limited to 'firmware/target/arm/rk27xx/lcdif-rk27xx.c')
-rw-r--r-- | firmware/target/arm/rk27xx/lcdif-rk27xx.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/firmware/target/arm/rk27xx/lcdif-rk27xx.c b/firmware/target/arm/rk27xx/lcdif-rk27xx.c new file mode 100644 index 0000000000..aeee63ee7e --- /dev/null +++ b/firmware/target/arm/rk27xx/lcdif-rk27xx.c | |||
@@ -0,0 +1,161 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2011 Marcin Bukat | ||
11 | * | ||
12 | * This program is free software; you can redistribute it and/or | ||
13 | * modify it under the terms of the GNU General Public License | ||
14 | * as published by the Free Software Foundation; either version 2 | ||
15 | * of the License, or (at your option) any later version. | ||
16 | * | ||
17 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
18 | * KIND, either express or implied. | ||
19 | * | ||
20 | ****************************************************************************/ | ||
21 | |||
22 | #include "config.h" | ||
23 | #include "kernel.h" | ||
24 | #include "lcd.h" | ||
25 | #include "system.h" | ||
26 | #include "cpu.h" | ||
27 | #include "lcdif-rk27xx.h" | ||
28 | |||
29 | |||
30 | unsigned int lcd_data_transform(unsigned int data) | ||
31 | { | ||
32 | unsigned int r, g, b; | ||
33 | |||
34 | #if defined(RK27_GENERIC) | ||
35 | /* 18 bit interface */ | ||
36 | r = (data & 0x0000fc00)<<8; | ||
37 | /* g = ((data & 0x00000300) >> 2) | ((data & 0x000000e0) >> 3); */ | ||
38 | g = ((data & 0x00000300) << 6) | ((data & 0x000000e0) << 5); | ||
39 | b = (data & 0x00000001f) << 3; | ||
40 | #elif defined(HM60X) | ||
41 | /* 16 bit interface */ | ||
42 | r = (data & 0x0000f800) << 8; | ||
43 | g = (data & 0x000007e0) << 5; | ||
44 | b = (data & 0x0000001f) << 3; | ||
45 | #else | ||
46 | #error "Unknown target" | ||
47 | #endif | ||
48 | |||
49 | return (r | g | b); | ||
50 | } | ||
51 | |||
52 | void lcd_cmd(unsigned int cmd) | ||
53 | { | ||
54 | LCD_COMMAND = lcd_data_transform(cmd); | ||
55 | } | ||
56 | |||
57 | void lcd_data(unsigned int data) | ||
58 | { | ||
59 | LCD_DATA = lcd_data_transform(data); | ||
60 | } | ||
61 | |||
62 | void lcd_write_reg(unsigned int reg, unsigned int val) | ||
63 | { | ||
64 | lcd_cmd(reg); | ||
65 | lcd_data(val); | ||
66 | } | ||
67 | |||
68 | static void lcdctrl_bypass(unsigned int on_off) | ||
69 | { | ||
70 | while (!(LCDC_STA & LCDC_MCU_IDLE)); | ||
71 | |||
72 | if (on_off) | ||
73 | MCU_CTRL |= MCU_CTRL_BYPASS; | ||
74 | else | ||
75 | MCU_CTRL &= ~MCU_CTRL_BYPASS; | ||
76 | } | ||
77 | |||
78 | /* This part is unclear. I am unable to use buffered/FIFO based writes | ||
79 | * to lcd. Depending on settings of IF I get various patterns on display | ||
80 | * but not what I want to display apparently. | ||
81 | */ | ||
82 | static void lcdctrl_init(void) | ||
83 | { | ||
84 | /* alpha b111 | ||
85 | * stop at current frame complete | ||
86 | * MCU mode | ||
87 | * 24b RGB | ||
88 | */ | ||
89 | LCDC_CTRL = ALPHA(7) | LCDC_STOP | LCDC_MCU | RGB24B; | ||
90 | MCU_CTRL = ALPHA_BASE(0x3f) | MCU_CTRL_BYPASS; | ||
91 | |||
92 | HOR_ACT = LCD_WIDTH + 3; /* define horizonatal active region */ | ||
93 | VERT_ACT = LCD_HEIGHT; /* define vertical active region */ | ||
94 | VERT_PERIOD = 0xfff; /* CSn/WEn/RDn signal timings */ | ||
95 | |||
96 | LINE0_YADDR = LINE_ALPHA_EN | 0x7fe; | ||
97 | LINE1_YADDR = LINE_ALPHA_EN | ((1 * LCD_WIDTH) - 2); | ||
98 | LINE2_YADDR = LINE_ALPHA_EN | ((2 * LCD_WIDTH) - 2); | ||
99 | LINE3_YADDR = LINE_ALPHA_EN | ((3 * LCD_WIDTH) - 2); | ||
100 | |||
101 | LINE0_UVADDR = 0x7fe + 1; | ||
102 | LINE1_UVADDR = ((1 * LCD_WIDTH) - 2 + 1); | ||
103 | LINE2_UVADDR = ((2 * LCD_WIDTH) - 2 + 1); | ||
104 | LINE3_UVADDR = ((3 * LCD_WIDTH) - 2 + 1); | ||
105 | |||
106 | #if 0 | ||
107 | LINE0_YADDR = 0; | ||
108 | LINE1_YADDR = (1 * LCD_WIDTH); | ||
109 | LINE2_YADDR = (2 * LCD_WIDTH); | ||
110 | LINE3_YADDR = (3 * LCD_WIDTH); | ||
111 | |||
112 | LINE0_UVADDR = 1; | ||
113 | LINE1_UVADDR = (1 * LCD_WIDTH) + 1; | ||
114 | LINE2_UVADDR = (2 * LCD_WIDTH) + 1; | ||
115 | LINE3_UVADDR = (3 * LCD_WIDTH) + 1; | ||
116 | |||
117 | START_X = 0; | ||
118 | START_Y = 0; | ||
119 | DELTA_X = 0x200; /* no scaling */ | ||
120 | DELTA_Y = 0x200; /* no scaling */ | ||
121 | #endif | ||
122 | LCDC_INTR_MASK = INTR_MASK_LINE; /* INTR_MASK_EVENLINE; */ | ||
123 | } | ||
124 | |||
125 | /* configure pins to drive lcd in 18bit mode */ | ||
126 | static void iomux_lcd(void) | ||
127 | { | ||
128 | unsigned long muxa; | ||
129 | |||
130 | muxa = SCU_IOMUXA_CON & ~(IOMUX_LCD_VSYNC|IOMUX_LCD_DEN|0xff); | ||
131 | muxa |= IOMUX_LCD_D18|IOMUX_LCD_D20|IOMUX_LCD_D22|IOMUX_LCD_D17|IOMUX_LCD_D16; | ||
132 | |||
133 | SCU_IOMUXA_CON = muxa; | ||
134 | SCU_IOMUXB_CON |= IOMUX_LCD_D815; | ||
135 | } | ||
136 | |||
137 | void lcd_init_device() | ||
138 | { | ||
139 | iomux_lcd(); /* setup pins for 16bit lcd interface */ | ||
140 | lcdctrl_init(); /* basic lcdc module configuration */ | ||
141 | |||
142 | lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */ | ||
143 | lcd_display_init(); | ||
144 | } | ||
145 | |||
146 | /* This is ugly hack. We drive lcd in bypass mode | ||
147 | * where all writes goes directly to lcd controller. | ||
148 | * This is suboptimal at best. IF module povides | ||
149 | * FIFO, internal sram buffer, hardware scaller, | ||
150 | * DMA signals, hardware alpha blending and more. | ||
151 | * BUT the fact is that I have no idea how to use | ||
152 | * this modes. Datasheet floating around is very | ||
153 | * unclean in this regard and OF uses ackward | ||
154 | * lcd update routines which are hard to understand. | ||
155 | * Moreover OF sets some bits in IF module registers | ||
156 | * which are referred as reseved in datasheet. | ||
157 | */ | ||
158 | void lcd_update() | ||
159 | { | ||
160 | lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT); | ||
161 | } | ||