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/***************************************************************************
* __________ __ ___.
* 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 "spfd5420a.h"
static inline void delay_nop(int cycles)
{
asm volatile ("1: subs %[n], %[n], #1 \n\t"
" bne 1b"
:
: [n] "r" (cycles));
}
static unsigned int lcd_data_transform(unsigned int data)
{
/* 18 bit interface */
unsigned int r, g, b;
r = (data & 0x0000fc00)<<8;
/* g = ((data & 0x00000300) >> 2) | ((data & 0x000000e0) >> 3); */
g = ((data & 0x00000300) << 6) | ((data & 0x000000e0) << 5);
b = (data & 0x00000001f) << 3;
return (r | g | b);
}
/* converts RGB565 pixel into internal lcd bus format */
static unsigned int lcd_pixel_transform(unsigned short rgb565)
{
unsigned int r, g, b;
b = rgb565 & 0x1f;
g = (rgb565 >> 5) & 0x3f;
r = (rgb565 >> 11) & 0x1f;
return r<<19 | g<<10 | b<<3;
}
static void lcd_cmd(unsigned int cmd)
{
LCD_COMMAND = lcd_data_transform(cmd);
}
static void lcd_data(unsigned int data)
{
LCD_DATA = lcd_data_transform(data);
}
static 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 = 400 + 3; /* define horizonatal active region */
VERT_ACT = 240; /* define vertical active region */
VERT_PERIOD = 0xfff; /* CSn/WEn/RDn signal timings */
LINE0_YADDR = LINE_ALPHA_EN | 0x7fe;
LINE1_YADDR = LINE_ALPHA_EN | ((1 * 400) - 2);
LINE2_YADDR = LINE_ALPHA_EN | ((2 * 400) - 2);
LINE3_YADDR = LINE_ALPHA_EN | ((3 * 400) - 2);
LINE0_UVADDR = 0x7fe + 1;
LINE1_UVADDR = ((1 * 400) - 2 + 1);
LINE2_UVADDR = ((2 * 400) - 2 + 1);
LINE3_UVADDR = ((3 * 400) - 2 + 1);
#if 0
LINE0_YADDR = 0;
LINE1_YADDR = (1 * 400);
LINE2_YADDR = (2 * 400);
LINE3_YADDR = (3 * 400);
LINE0_UVADDR = 1;
LINE1_UVADDR = (1 * 400) + 1;
LINE2_UVADDR = (2 * 400) + 1;
LINE3_UVADDR = (3 * 400) + 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;
}
/* not tested */
static void lcd_sleep(unsigned int sleep)
{
if (sleep)
{
/* enter sleep mode */
lcd_write_reg(DISPLAY_CTRL1, 0x0170);
delay_nop(50);
lcd_write_reg(DISPLAY_CTRL1, 0x0000);
delay_nop(50);
lcd_write_reg(PWR_CTRL1, 0x14B4);
}
else
{
/* return to normal operation */
lcd_write_reg(PWR_CTRL1, 0x14B0);
delay_nop(50);
lcd_write_reg(DISPLAY_CTRL1, 0x0173);
}
lcd_cmd(GRAM_WRITE);
}
void lcd_init_device()
{
unsigned int x, y;
iomux_lcd(); /* setup pins for 18bit lcd interface */
lcdctrl_init(); /* basic lcdc module configuration */
lcdctrl_bypass(1); /* run in bypass mode - all writes goes directly to lcd controller */
lcd_write_reg(RESET, 0x0001);
delay_nop(10000);
lcd_write_reg(RESET, 0x0000);
delay_nop(10000);
lcd_write_reg(IF_ENDIAN, 0x0000); /* order of receiving data */
lcd_write_reg(DRIVER_OUT_CTRL, 0x0000);
lcd_write_reg(ENTRY_MODE, 0x1038);
lcd_write_reg(WAVEFORM_CTRL, 0x0100);
lcd_write_reg(SHAPENING_CTRL, 0x0000);
lcd_write_reg(DISPLAY_CTRL2, 0x0808);
lcd_write_reg(LOW_PWR_CTRL1, 0x0001);
lcd_write_reg(LOW_PWR_CTRL2, 0x0010);
lcd_write_reg(EXT_DISP_CTRL1, 0x0000);
lcd_write_reg(EXT_DISP_CTRL2, 0x0000);
lcd_write_reg(BASE_IMG_SIZE, 0x3100);
lcd_write_reg(BASE_IMG_CTRL, 0x0001);
lcd_write_reg(VSCROLL_CTRL, 0x0000);
lcd_write_reg(PART1_POS, 0x0000);
lcd_write_reg(PART1_START, 0x0000);
lcd_write_reg(PART1_END, 0x018F);
lcd_write_reg(PART2_POS, 0x0000);
lcd_write_reg(PART2_START, 0x0000);
lcd_write_reg(PART2_END, 0x0000);
lcd_write_reg(PANEL_IF_CTRL1, 0x0011);
delay_nop(10000);
lcd_write_reg(PANEL_IF_CTRL2, 0x0202);
lcd_write_reg(PANEL_IF_CTRL3, 0x0300);
delay_nop(10000);
lcd_write_reg(PANEL_IF_CTRL4, 0x021E);
lcd_write_reg(PANEL_IF_CTRL5, 0x0202);
lcd_write_reg(PANEL_IF_CTRL6, 0x0100);
lcd_write_reg(FRAME_MKR_CTRL, 0x0000);
lcd_write_reg(MDDI_CTRL, 0x0000);
lcd_write_reg(GAMMA_CTRL1, 0x0101);
lcd_write_reg(GAMMA_CTRL2, 0x0000);
lcd_write_reg(GAMMA_CTRL3, 0x0016);
lcd_write_reg(GAMMA_CTRL4, 0x2913);
lcd_write_reg(GAMMA_CTRL5, 0x260B);
lcd_write_reg(GAMMA_CTRL6, 0x0101);
lcd_write_reg(GAMMA_CTRL7, 0x1204);
lcd_write_reg(GAMMA_CTRL8, 0x0415);
lcd_write_reg(GAMMA_CTRL9, 0x0205);
lcd_write_reg(GAMMA_CTRL10, 0x0303);
lcd_write_reg(GAMMA_CTRL11, 0x0E05);
lcd_write_reg(GAMMA_CTRL12, 0x0D01);
lcd_write_reg(GAMMA_CTRL13, 0x010D);
lcd_write_reg(GAMMA_CTRL14, 0x050E);
lcd_write_reg(GAMMA_CTRL15, 0x0303);
lcd_write_reg(GAMMA_CTRL16, 0x0502);
/* power on */
lcd_write_reg(DISPLAY_CTRL1, 0x0001);
lcd_write_reg(PWR_CTRL6, 0x0001);
lcd_write_reg(PWR_CTRL7, 0x0060);
delay_nop(50000);
lcd_write_reg(PWR_CTRL1, 0x16B0);
delay_nop(10000);
lcd_write_reg(PWR_CTRL2, 0x0147);
delay_nop(10000);
lcd_write_reg(PWR_CTRL3, 0x0117);
delay_nop(10000);
lcd_write_reg(PWR_CTRL4, 0x2F00);
delay_nop(50000);
lcd_write_reg(VCOM_HV2, 0x0000); /* src 0x0090 */
delay_nop(10000);
lcd_write_reg(VCOM_HV1, 0x0008); /* src 0x000A */
lcd_write_reg(PWR_CTRL3, 0x01BE);
delay_nop(10000);
/* addresses setup */
lcd_write_reg(WINDOW_H_START, 0x0000);
lcd_write_reg(WINDOW_H_END, 0x00EF); /* 239 */
lcd_write_reg(WINDOW_V_START, 0x0000);
lcd_write_reg(WINDOW_V_END, 0x018F); /* 399 */
lcd_write_reg(GRAM_H_ADDR, 0x0000);
lcd_write_reg(GRAM_V_ADDR, 0x0000);
/* display on */
lcd_write_reg(DISPLAY_CTRL1, 0x0021);
delay_nop(40000);
lcd_write_reg(DISPLAY_CTRL1, 0x0061);
delay_nop(100000);
lcd_write_reg(DISPLAY_CTRL1, 0x0173);
delay_nop(300000);
/* clear screen */
lcd_cmd(GRAM_WRITE);
for (x=0; x<400; x++)
for(y=0; y<240; y++)
lcd_data(0x000000);
lcd_sleep(0);
}
/* 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()
{
unsigned int x,y;
for (y=0; y<240; y++)
for (x=0; x<400; x++)
LCD_DATA = lcd_pixel_transform(lcd_framebuffer[y][x]);
}
/* not implemented yet */
void lcd_update_rect(int x, int y, int width, int height)
{
(void)x;
(void)y;
(void)width;
(void)height;
lcd_update();
}
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