1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2011 Marcin Bukat
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.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
27 #include "lcdif-rk27xx.h"
30 unsigned int lcd_data_transform(unsigned int data
)
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) || defined(HM801)
41 /* 16 bit interface */
42 r
= (data
& 0x0000f800) << 8;
43 g
= (data
& 0x000007e0) << 5;
44 b
= (data
& 0x0000001f) << 3;
46 #error "Unknown target"
52 void lcd_cmd(unsigned int cmd
)
54 LCD_COMMAND
= lcd_data_transform(cmd
);
57 void lcd_data(unsigned int data
)
59 LCD_DATA
= lcd_data_transform(data
);
62 void lcd_write_reg(unsigned int reg
, unsigned int val
)
68 static void lcdctrl_bypass(unsigned int on_off
)
70 while (!(LCDC_STA
& LCDC_MCU_IDLE
));
73 MCU_CTRL
|= MCU_CTRL_BYPASS
;
75 MCU_CTRL
&= ~MCU_CTRL_BYPASS
;
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.
82 static void lcdctrl_init(void)
85 * stop at current frame complete
89 LCDC_CTRL
= ALPHA(7) | LCDC_STOP
| LCDC_MCU
| RGB24B
;
90 MCU_CTRL
= ALPHA_BASE(0x3f) | MCU_CTRL_BYPASS
;
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 */
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);
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);
108 LINE1_YADDR
= (1 * LCD_WIDTH
);
109 LINE2_YADDR
= (2 * LCD_WIDTH
);
110 LINE3_YADDR
= (3 * LCD_WIDTH
);
113 LINE1_UVADDR
= (1 * LCD_WIDTH
) + 1;
114 LINE2_UVADDR
= (2 * LCD_WIDTH
) + 1;
115 LINE3_UVADDR
= (3 * LCD_WIDTH
) + 1;
119 DELTA_X
= 0x200; /* no scaling */
120 DELTA_Y
= 0x200; /* no scaling */
122 LCDC_INTR_MASK
= INTR_MASK_LINE
; /* INTR_MASK_EVENLINE; */
125 /* configure pins to drive lcd in 18bit mode (16bit mode for HiFiMAN's) */
126 static void iomux_lcd(enum lcdif_mode_t mode
)
130 muxa
= SCU_IOMUXA_CON
& ~(IOMUX_LCD_VSYNC
|IOMUX_LCD_DEN
|0xff);
132 if (mode
== LCDIF_18BIT
)
134 muxa
|= IOMUX_LCD_D18
|IOMUX_LCD_D20
|IOMUX_LCD_D22
|IOMUX_LCD_D17
|IOMUX_LCD_D16
;
137 SCU_IOMUXA_CON
= muxa
;
138 SCU_IOMUXB_CON
|= IOMUX_LCD_D815
;
141 void lcdif_init(enum lcdif_mode_t mode
)
143 iomux_lcd(mode
); /* setup pins for lcd interface */
144 lcdctrl_init(); /* basic lcdc module configuration */
145 lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */
148 /* This is ugly hack. We drive lcd in bypass mode
149 * where all writes goes directly to lcd controller.
150 * This is suboptimal at best. IF module povides
151 * FIFO, internal sram buffer, hardware scaller,
152 * DMA signals, hardware alpha blending and more.
153 * BUT the fact is that I have no idea how to use
154 * this modes. Datasheet floating around is very
155 * unclean in this regard and OF uses ackward
156 * lcd update routines which are hard to understand.
157 * Moreover OF sets some bits in IF module registers
158 * which are referred as reseved in datasheet.
162 lcd_update_rect(0, 0, LCD_WIDTH
, LCD_HEIGHT
);