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rockbox/firmware/target/arm/as3525/sansa-e200v2/lcd-e200v2.c
Michael Chicoine 10f46b3c8a fix an off-by-one error in lcd_update_rect() 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23359 a1c6a512-1295-4272-9138-f99709370657
2009-10-26 15:42:26 +00:00

589 lines
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2004 by Linus Nielsen Feltzing
*
* 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 "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"
#include "clock-target.h"
static bool display_on = false; /* is the display turned on? */
static bool display_flipped = false;
/* we need to write a red pixel for correct button reads
* (see lcd_button_support()), but that must not happen while the lcd is
* updating so block lcd_button_support the during updates */
static volatile bool lcd_busy = false;
/* 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
/* Flip Flag */
#define R_ENTRY_MODE_HORZ_NORMAL 0x7030
#define R_ENTRY_MODE_HORZ_FLIPPED 0x7000
static unsigned short r_entry_mode = R_ENTRY_MODE_HORZ_NORMAL;
#define R_ENTRY_MODE_VERT 0x7038
#define R_ENTRY_MODE_SOLID_VERT 0x1038
#define R_ENTRY_MODE_VIDEO_NORMAL 0x7020
#define R_ENTRY_MODE_VIDEO_FLIPPED 0x7010
/* Reverse Flag */
#define R_DISP_CONTROL_NORMAL 0x0004
#define R_DISP_CONTROL_REV 0x0000
static unsigned short r_disp_control_rev = R_DISP_CONTROL_NORMAL;
static inline void lcd_delay(int x)
{
do {
asm volatile ("nop\n");
} while (x--);
}
/* DBOP initialisation, do what OF does */
static void ams3525_dbop_init(void)
{
CGU_DBOP = (1<<3) | AS3525_DBOP_DIV;
DBOP_TIMPOL_01 = 0xe167e167;
DBOP_TIMPOL_23 = 0xe167006e;
/* short count, 16bit write, read-timing =8 */
DBOP_CTRL = (1<<18)|(1<<12)|(8<<0);
GPIOB_AFSEL = 0xfc;
GPIOC_AFSEL = 0xff;
DBOP_TIMPOL_23 = 0x6000e;
/* short count,write enable, 16bit write, read-timing =8 */
DBOP_CTRL = (1<<18)|(1<<16)|(1<<12)|(8<<0);
DBOP_TIMPOL_01 = 0x6e167;
DBOP_TIMPOL_23 = 0xa167e06f;
/* TODO: The OF calls some other functions here, but maybe not important */
}
static void lcd_write_single_data16(unsigned short value)
{
DBOP_CTRL &= ~(1<<14|1<<13);
lcd_delay(10);
DBOP_DOUT16 = value;
while ((DBOP_STAT & (1<<10)) == 0);
}
static void lcd_write_cmd(int cmd)
{
/* Write register */
DBOP_TIMPOL_23 = 0xa167006e;
lcd_write_single_data16(cmd);
/* Wait for fifo to empty */
while ((DBOP_STAT & (1<<10)) == 0);
/* Fuze OF has this loop and it seems to help us now also */
int delay=8;
while(delay--);
DBOP_TIMPOL_23 = 0xa167e06f;
}
void lcd_write_data(const fb_data* p_bytes, int count)
{
const long *data;
if ((int)p_bytes & 0x3)
{ /* need to do a single 16bit write beforehand if the address is */
/* not word aligned*/
lcd_write_single_data16(*p_bytes);
count--;p_bytes++;
}
/* from here, 32bit transfers are save */
/* set it to transfer 4*(outputwidth) units at a time, */
/* if bit 12 is set it only does 2 halfwords though */
DBOP_CTRL |= (1<<13|1<<14);
data = (long*)p_bytes;
while (count > 1)
{
DBOP_DOUT32 = *data++;
count -= 2;
/* Wait if push fifo is full */
while ((DBOP_STAT & (1<<6)) != 0);
}
/* While push fifo is not empty */
while ((DBOP_STAT & (1<<10)) == 0);
/* due to the 32bit alignment requirement or uneven count,
* we possibly need to do a 16bit transfer at the end also */
if (count > 0)
lcd_write_single_data16(*(fb_data*)data);
}
static void lcd_write_reg(int reg, int value)
{
fb_data data = value;
lcd_write_cmd(reg);
lcd_write_single_data16(data);
}
/*** hardware configuration ***/
void lcd_set_contrast(int val)
{
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
r_disp_control_rev = yesno ? R_DISP_CONTROL_REV :
R_DISP_CONTROL_NORMAL;
if (display_on)
{
lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
}
}
/* turn the display upside down */
void lcd_set_flip(bool yesno)
{
display_flipped = yesno;
r_entry_mode = yesno ? R_ENTRY_MODE_HORZ_FLIPPED :
R_ENTRY_MODE_HORZ_NORMAL;
}
static void lcd_window(int xmin, int ymin, int xmax, int ymax)
{
if (!display_flipped)
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, (ymin << 8) | xmin);
}
else
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
lcd_write_reg(R_VERT_RAM_ADDR_POS,
((LCD_HEIGHT-1 - ymin) << 8) | (LCD_HEIGHT-1 - ymax));
lcd_write_reg(R_RAM_ADDR_SET,
((LCD_HEIGHT-1 - ymin) << 8) | (LCD_WIDTH-1 - xmin));
}
}
static void _display_on(void)
{
/* Initialisation the display the same way as the original firmware */
lcd_write_reg(R_START_OSC, 0x0001); /* Start Oscilation */
lcd_write_reg(R_DRV_OUTPUT_CONTROL, 0x011b); /* 220 lines, GS=0, SS=1 */
/* B/C = 1: n-line inversion form
* EOR = 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 horizontal direction; left to right;
* vertical increment horizontal increment.
* data format for 8bit transfer or spi = 65k (5,6,5) */
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
/* Replace data on writing to GRAM */
lcd_write_reg(R_COMPARE_REG1, 0);
lcd_write_reg(R_COMPARE_REG2, 0);
/* GON = 0, DTE = 0, D1-0 = 00b */
lcd_write_reg(R_DISP_CONTROL1, 0x0000 | r_disp_control_rev);
/* Front porch lines: 2; Back porch lines: 2; */
lcd_write_reg(R_DISP_CONTROL2, 0x0203);
/* Scan cycle = 0 frames */
lcd_write_reg(R_DISP_CONTROL3, 0x0000);
/* 16 clocks */
lcd_write_reg(R_FRAME_CYCLE_CONTROL, 0x0000);
/* 18-bit RGB interface (one transfer/pixel)
* internal clock operation;
* System interface/VSYNC interface */
lcd_write_reg(R_EXT_DISP_IF_CONTROL, 0x0000);
/* zero everything*/
lcd_write_reg(R_POWER_CONTROL1, 0x0000); /* STB = 0, SLP = 0 */
lcd_delay(10);
/* initialise power supply */
/* DC12-10 = 000b: Step-up1 = clock/8,
* DC02-00 = 000b: Step-up2 = clock/16,
* VC2-0 = 010b: VciOUT = 0.87 * VciLVL */
lcd_write_reg(R_POWER_CONTROL2, 0x0002);
/* VRH3-0 = 1000b: Vreg1OUT = REGP * 1.90 */
lcd_write_reg(R_POWER_CONTROL3, 0x0008);
lcd_delay(40);
lcd_write_reg(R_POWER_CONTROL4, 0x0000); /* VCOMG = 0 */
/* This register is unknown */
lcd_write_reg(0x56, 0x80f);
lcd_write_reg(R_POWER_CONTROL1, 0x4140);
lcd_delay(10);
lcd_write_reg(R_POWER_CONTROL2, 0x0000);
lcd_write_reg(R_POWER_CONTROL3, 0x0013);
lcd_delay(20);
lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
lcd_delay(20);
lcd_write_reg(R_POWER_CONTROL4, 0x6d0e);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS1, 0x0002);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS2, 0x0707);
lcd_write_reg(R_GAMMA_FINE_ADJ_POS3, 0x0182);
lcd_write_reg(R_GAMMA_GRAD_ADJ_POS, 0x0203);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG1, 0x0706);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG2, 0x0006);
lcd_write_reg(R_GAMMA_FINE_ADJ_NEG3, 0x0706);
lcd_write_reg(R_GAMMA_GRAD_ADJ_NEG, 0x0000);
lcd_write_reg(R_GAMMA_AMP_ADJ_RES_POS, 0x030f);
lcd_write_reg(R_GAMMA_AMP_AVG_ADJ_RES_NEG, 0x0f08);
lcd_write_reg(R_GATE_SCAN_POS, 0);
lcd_write_reg(R_VERT_SCROLL_CONTROL, 0);
lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
lcd_write_reg(R_1ST_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
lcd_write_reg(R_2ND_SCR_DRV_POS, (LCD_HEIGHT-1) << 8);
lcd_write_reg(R_DISP_CONTROL1, 0x0033 | r_disp_control_rev);
display_on=true; /* must be done before calling lcd_update() */
lcd_update();
}
/* LCD init */
void lcd_init_device(void)
{
ams3525_dbop_init();
/* Init GPIOs the same as the OF */
GPIOA_DIR |= (1<<5);
GPIOA_PIN(5) = 0;
GPIOA_PIN(4) = 0; /*c80b0040 := 0;*/
lcd_delay(1);
GPIOA_PIN(5) = (1<<5);
lcd_delay(1);
_display_on();
}
#if defined(HAVE_LCD_ENABLE)
void lcd_enable(bool on)
{
if(display_on!=on)
{
if(on)
{
_display_on();
send_event(LCD_EVENT_ACTIVATION, NULL);
}
else
{
display_on=false;
lcd_write_reg(R_POWER_CONTROL1, 0x0001);
}
}
}
#endif
#if defined(HAVE_LCD_ENABLE) || defined(HAVE_LCD_SLEEP)
bool lcd_active(void)
{
return display_on;
}
#endif
/*** update functions ***/
static unsigned lcd_yuv_options = 0;
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
extern void lcd_write_yuv420_lines(unsigned char const * const src[3],
int width,
int stride);
extern void lcd_write_yuv420_lines_odither(unsigned char const * const src[3],
int width,
int stride,
int x_screen, /* To align dither pattern */
int y_screen);
void lcd_yuv_set_options(unsigned options)
{
lcd_yuv_options = options;
}
static void lcd_window_blit(int xmin, int ymin, int xmax, int ymax)
{
if (!display_flipped)
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS,
((LCD_WIDTH-1 - xmin) << 8) | (LCD_WIDTH-1 - xmax));
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET,
(ymin << 8) | (LCD_WIDTH-1 - xmin));
}
else
{
lcd_write_reg(R_HORIZ_RAM_ADDR_POS, (xmax << 8) | xmin);
lcd_write_reg(R_VERT_RAM_ADDR_POS, (ymax << 8) | ymin);
lcd_write_reg(R_RAM_ADDR_SET, (ymax << 8) | xmin);
}
}
/* Performance function to blit a YUV bitmap directly to the LCD
* src_x, src_y, width and height should be even
* x, y, width and height have to be within LCD bounds
*/
void lcd_blit_yuv(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
unsigned char const * yuv_src[3];
off_t z;
lcd_busy = true;
/* Sorry, but width and height must be >= 2 or else */
width &= ~1;
height >>= 1;
z = stride*src_y;
yuv_src[0] = src[0] + z + src_x;
yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1);
yuv_src[2] = src[2] + (yuv_src[1] - src[1]);
if (!display_flipped)
{
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_NORMAL);
}
else
{
lcd_write_reg(R_ENTRY_MODE, R_ENTRY_MODE_VIDEO_FLIPPED);
}
if (lcd_yuv_options & LCD_YUV_DITHER)
{
do
{
lcd_window_blit(y, x, y+1, x+width-1);
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_yuv420_lines_odither(yuv_src, width, stride, x, y);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
y+=2;
}
while (--height > 0);
}
else
{
do
{
lcd_window_blit(y, x, y+1, x+width-1);
/* Start write to GRAM */
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_yuv420_lines(yuv_src, width, stride);
yuv_src[0] += stride << 1; /* Skip down two luma lines */
yuv_src[1] += stride >> 1; /* Skip down one chroma line */
yuv_src[2] += stride >> 1;
y+=2;
}
while (--height > 0);
}
lcd_busy = false;
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
if (!display_on)
return;
lcd_busy = true;
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
/* Set start position and window */
lcd_window(0, 0, LCD_WIDTH-1, LCD_HEIGHT-1);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_data((fb_data*)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT);
lcd_busy = false;
} /* lcd_update */
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
const fb_data *ptr;
int ymax, xmax;
if (!display_on)
return;
xmax = x + width;
if (xmax >= LCD_WIDTH)
xmax = LCD_WIDTH - 1; /* Clip right */
if (x < 0)
x = 0; /* Clip left */
if (x >= xmax)
return; /* nothing left to do */
width = xmax - x + 1; /* Fix width */
ymax = y + height;
if (ymax >= LCD_HEIGHT)
ymax = LCD_HEIGHT - 1; /* Clip bottom */
if (y < 0)
y = 0; /* Clip top */
if (y >= ymax)
return; /* nothing left to do */
lcd_busy = true;
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
lcd_window(x, y, xmax, ymax);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
ptr = (fb_data*)&lcd_framebuffer[y][x];
height = ymax - y - 1; /* fix height */
do
{
lcd_write_data(ptr, width);
ptr += LCD_WIDTH;
}
while (--height >= 0);
lcd_busy = false;
} /* lcd_update_rect */
/* writes one red pixel outside the visible area, needed for correct
* dbop reads */
bool lcd_button_support(void)
{
fb_data data = (0xf<<12);
if (lcd_busy)
return false;
lcd_write_reg(R_ENTRY_MODE, r_entry_mode);
/* Set start position and window */
lcd_window(LCD_WIDTH+1, LCD_HEIGHT+1, LCD_WIDTH+2, LCD_HEIGHT+2);
lcd_write_cmd(R_WRITE_DATA_2_GRAM);
lcd_write_single_data16(data);
return true;
}
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