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rockbox/firmware/drivers/lcd-h300.c
Jens Arnold f3857abf6b H300: lcd_write_data() in pure asm, essentially the same speed as before, but working correctly for all allowed data lengths. Removed RAM waste by declaring inline functions static. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8575 a1c6a512-1295-4272-9138-f99709370657
2006-02-05 00:24:08 +00:00

389 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2004 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "lcd.h"
#include "kernel.h"
#include "thread.h"
#include <string.h>
#include <stdlib.h>
#include "file.h"
#include "debug.h"
#include "system.h"
#include "font.h"
#include "bidi.h"
static bool display_on=false; /* is the display turned on? */
/* register defines */
#define R_START_OSC 0x00
#define R_DRV_OUTPUT_CONTROL 0x01
#define R_DRV_WAVEFORM_CONTROL 0x02
#define R_ENTRY_MODE 0x03
#define R_COMPARE_REG1 0x04
#define R_COMPARE_REG2 0x05
#define R_DISP_CONTROL1 0x07
#define R_DISP_CONTROL2 0x08
#define R_DISP_CONTROL3 0x09
#define R_FRAME_CYCLE_CONTROL 0x0b
#define R_EXT_DISP_IF_CONTROL 0x0c
#define R_POWER_CONTROL1 0x10
#define R_POWER_CONTROL2 0x11
#define R_POWER_CONTROL3 0x12
#define R_POWER_CONTROL4 0x13
#define R_RAM_ADDR_SET 0x21
#define R_WRITE_DATA_2_GRAM 0x22
#define R_GAMMA_FINE_ADJ_POS1 0x30
#define R_GAMMA_FINE_ADJ_POS2 0x31
#define R_GAMMA_FINE_ADJ_POS3 0x32
#define R_GAMMA_GRAD_ADJ_POS 0x33
#define R_GAMMA_FINE_ADJ_NEG1 0x34
#define R_GAMMA_FINE_ADJ_NEG2 0x35
#define R_GAMMA_FINE_ADJ_NEG3 0x36
#define R_GAMMA_GRAD_ADJ_NEG 0x37
#define R_GAMMA_AMP_ADJ_RES_POS 0x38
#define R_GAMMA_AMP_AVG_ADJ_RES_NEG 0x39
#define R_GATE_SCAN_POS 0x40
#define R_VERT_SCROLL_CONTROL 0x41
#define R_1ST_SCR_DRV_POS 0x42
#define R_2ND_SCR_DRV_POS 0x43
#define R_HORIZ_RAM_ADDR_POS 0x44
#define R_VERT_RAM_ADDR_POS 0x45
/* called very frequently - inline! */
static inline void lcd_write_reg(int reg, int val)
{
*(volatile unsigned short *)0xf0000000 = reg;
*(volatile unsigned short *)0xf0000002 = val;
}
/* called very frequently - inline! */
static inline void lcd_begin_write_gram(void)
{
*(volatile unsigned short *)0xf0000000 = R_WRITE_DATA_2_GRAM;
}
/*** hardware configuration ***/
void lcd_set_contrast(int val)
{
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
(void)yesno;
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
(void)yesno;
}
/* Rolls up the lcd display by the specified amount of lines.
* Lines that are rolled out over the top of the screen are
* rolled in from the bottom again. This is a hardware
* remapping only and all operations on the lcd are affected.
* ->
* @param int lines - The number of lines that are rolled.
* The value must be 0 <= pixels < LCD_HEIGHT. */
void lcd_roll(int lines)
{
(void)lines;
}
/* LCD init */
void lcd_init_device(void)
{
/* GPO46 is LCD RESET */
or_l(0x00004000, &GPIO1_OUT);
or_l(0x00004000, &GPIO1_ENABLE);
or_l(0x00004000, &GPIO1_FUNCTION);
/* Reset LCD */
sleep(1);
and_l(~0x00004000, &GPIO1_OUT);
sleep(1);
or_l(0x00004000, &GPIO1_OUT);
sleep(1);
lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
sleep(1);
lcd_write_reg(R_DISP_CONTROL1, 0x0040); /* zero all bits */
lcd_write_reg(R_POWER_CONTROL3, 0x0000);
lcd_write_reg(R_POWER_CONTROL4, 0x0000);
sleep(1);
lcd_write_reg(R_POWER_CONTROL2, 0x0003); /* VciOUT = 0.83*VciLVL */
lcd_write_reg(R_POWER_CONTROL3, 0x0008); /* Vreg1OUT = REGP*1.90 */
/* Vcom-level amplitude = 1.23*Vreg1OUT
* VcomH-level amplitude = 0.84*Vreg1OUT */
lcd_write_reg(R_POWER_CONTROL4, 0x3617);
lcd_write_reg(R_POWER_CONTROL3, 0x0008); /* Vreg1OUT = REGP*1.90 */
lcd_write_reg(R_POWER_CONTROL1, 0x0004); /* Step-up circuit 1 ON */
lcd_write_reg(R_POWER_CONTROL1, 0x0004);
lcd_write_reg(R_POWER_CONTROL2, 0x0002); /* VciOUT = 0.87*VciLVL */
lcd_write_reg(R_POWER_CONTROL3, 0x0018); /* turn on VLOUT3 */
lcd_write_reg(R_POWER_CONTROL1, 0x0044); /* LCD power supply Op.Amp
const curr = 1 */
sleep(1);
/* Step-up rate:
* VLOUT1 (DDVDH) = Vci1*2
* VLOUT4 (VCL) = Vci1*(-1)
* VLOUT2 (VGH) = DDVDH*3 = Vci1*6
* VLOUT3 (VGL) = - DDVDH*2 = Vci1*(-4) */
lcd_write_reg(R_POWER_CONTROL1, 0x0144);
/* Step-Up circuit 1 Off;
* VLOUT2 (VGH) = Vci1 + DDVDH*2 = Vci1*5
* VLOUT3 (VGL) = -(Vci1+DDVDH) = Vci1*(-3) */
lcd_write_reg(R_POWER_CONTROL1, 0x0540);
/* Vcom-level ampl = Vreg1OUT*1.11
* VcomH-level ampl = Vreg1OUT*0.86 */
lcd_write_reg(R_POWER_CONTROL4, 0x3218);
/* ??Number lines invalid? */
lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x001b);
/* B/C = 1 ; n-line inversion form; polarity inverses at completion of
* driving n lines
* Exclusive OR = 1; polarity inversion occurs by applying an EOR to
* odd/even frame select signal and an n-line inversion signal.
* FLD = 01b (1 field interlaced scan, external display iface) */
lcd_write_reg(R_DRV_WAVEFORM_CONTROL, 0x0700);
/* Address counter updated in vertical direction; left to right;
* vertical increment horizontal increment.
* data format for 8bit transfer or spi = 65k (5,6,5)
* Reverse order of RGB to BGR for 18bit data written to GRAM
* Replace data on writing to GRAM */
lcd_write_reg(R_ENTRY_MODE, 0x7038);
/* ???? compare val = (1)1100 0011 0000b; the MSB bit is out of spec.*/
lcd_write_reg(R_COMPARE_REG1, 0x7030);
lcd_write_reg(R_COMPARE_REG2, 0x0000);
lcd_write_reg(R_GATE_SCAN_POS, 0x0000);
lcd_write_reg(R_VERT_SCROLL_CONTROL, 0x0000);
/* Gate Line = 0+1 = 1
* gate "end" line = 0xdb + 1 = 0xdc */
lcd_write_reg(R_1ST_SCR_DRV_POS, 0xdb00);
lcd_write_reg(R_2ND_SCR_DRV_POS, 0x0000);
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0xaf00);/* horiz ram addr 0 - 175 */
lcd_write_reg(R_VERT_RAM_ADDR_POS, 0xdb00);/* vert ram addr 0 - 219 */
/* 19 clocks,no equalization */
lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0002);
/* Transfer mode for RGB interface disabled
* internal clock operation;
* System interface/VSYNC interface */
lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0003);
sleep(1);
lcd_write_reg(R_POWER_CONTROL1, 0x4540); /* Turn on the op-amp (1) */
/* Enable internal display operations, not showed on the ext. display yet
* Source: GND; Internal: ON; Gate-Driver control signals: ON*/
lcd_write_reg(R_DISP_CONTROL1, 0x0041);
sleep(1);
/* Front porch lines: 8; Back porch lines: 8; */
lcd_write_reg(R_DISP_CONTROL2, 0x0808);
/* Scan mode by the gate driver in the non-display area: disabled;
* Cycle of scan by the gate driver - set to 31frames(518ms),disabled by
* above setting */
lcd_write_reg(R_DISP_CONTROL3, 0x003f);
sleep(1);
/* Vertical scrolling disabled;
* Gate Output: VGH/VGL;
* Reversed grayscale image on;
* Source output: Non-lit display; internal disp.operation: ON, gate-driver
* control signals: ON
* Note: bit 6 (zero based) isn't set to 1 (according to the datasheet
* it should be) */
lcd_write_reg(R_DISP_CONTROL1, 0x0636);
sleep(1);
lcd_write_reg(R_DISP_CONTROL1, 0x0626);/* Gate output:VGL; 6th bit not set*/
sleep(1);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0003);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0007);
lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0705);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0007);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0000);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0407);
lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0507);
lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x1d09);
lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0303);
/* VcomH = Vreg1OUT*0.70
* Vcom amplitude = Vreg1OUT*0.78 */
lcd_write_reg(R_POWER_CONTROL4, 0x2610);
/* LCD ON
* Vertical scrolling: Originaly designated position/external display
* Reverse grayscale off;
* Internal display operation ON, Gate driver control signals: ON; Source
* output GND */
lcd_write_reg(R_DISP_CONTROL1, 0x0061);
sleep(1);
/* init the GRAM, the framebuffer is already cleared in the
* device independent lcd_init() */
lcd_write_reg(R_RAM_ADDR_SET, 0);
lcd_begin_write_gram();
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
/* Reverse grayscale on;
* Source output: display */
lcd_write_reg(R_DISP_CONTROL1, 0x0067);
sleep(1);
/* Vertical Scrolling disabled
* Gate output: VGH/VGL
* 6th bit not set*/
lcd_write_reg(R_DISP_CONTROL1, 0x0637);
/* ok, the display is finally on */
display_on=true;
}
void lcd_enable(bool on)
{
if(display_on!=on)
{
if(on)
{
lcd_init_device();
}
else
{
lcd_write_reg(R_FRAME_CYCLE_CONTROL,0x0002); /* No EQ, 19 clocks */
/* Gate Output VGH/VGL; Non-lit display internal disp. ON,
* gate-driver control ON; */
lcd_write_reg(R_DISP_CONTROL1,0x0072);
sleep(1);
lcd_write_reg(R_DISP_CONTROL1,0x0062); /* Gate Output: VGL */
sleep(1);
/* Gate Output VGH; Source Output: GND;
* internal display operation:halt
* Gate-Driver control signals: OFF */
lcd_write_reg(R_DISP_CONTROL1,0x0040);
/* Now, turn off the power */
/* Halt op. amp & step-up circuit */
lcd_write_reg(R_POWER_CONTROL1,0x0000);
lcd_write_reg(R_POWER_CONTROL3,0x0000); /* Turn OFF VLOUT3 */
/* halt negative volt ampl. */
lcd_write_reg(R_POWER_CONTROL4,0x0000);
display_on=false;
}
/* display_on = on */
}
}
/*** update functions ***/
/* Performance function that works with an external buffer
note that by and bheight are in 8-pixel units! */
void lcd_blit(const fb_data* data, int x, int by, int width,
int bheight, int stride)
{
/* TODO: Implement lcd_blit() */
(void)data;
(void)x;
(void)by;
(void)width;
(void)bheight;
(void)stride;
/*if(display_on)*/
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void) ICODE_ATTR;
void lcd_update(void)
{
if(display_on){
/* Copy display bitmap to hardware */
lcd_write_reg(R_RAM_ADDR_SET, 0);
lcd_begin_write_gram();
lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
}
}
/* Update a fraction of the display. */
void lcd_update_rect(int, int, int, int) ICODE_ATTR;
void lcd_update_rect(int x, int y, int width, int height)
{
if(display_on) {
int ymax = y + height;
if(x + width > LCD_WIDTH)
width = LCD_WIDTH - x;
if (width <= 0)
return; /* nothing left to do, 0 is harmful to lcd_write_data() */
if(ymax >= LCD_HEIGHT)
ymax = LCD_HEIGHT-1;
/* set update window */
/* horiz ram addr */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (ymax<<8) | y);
/* vert ram addr */
lcd_write_reg(R_VERT_RAM_ADDR_POS,((x+width-1)<<8) | x);
lcd_write_reg(R_RAM_ADDR_SET, (x<<8) | y);
lcd_begin_write_gram();
/* Copy specified rectangle bitmap to hardware */
for (; y <= ymax; y++)
{
lcd_write_data ((unsigned short *)&lcd_framebuffer[y][x], width);
}
/* reset update window */
/* horiz ram addr: 0 - 175 */
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, 0xaf00);
/* vert ram addr: 0 - 219 */
lcd_write_reg(R_VERT_RAM_ADDR_POS, 0xdb00);
}
}
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