mirror of
https://github.com/Rockbox/rockbox.git
synced 2025-12-09 05:05:20 -05:00
0662793ca0
Cleaned up, rebased, and forward-ported from the xvortex fork. (original credit to vsoftster@gmail.com) Change-Id: Ibcc023a0271ea81e901450a88317708c2683236d Signed-off-by: Solomon Peachy <pizza@shaftnet.org>
420 lines
12 KiB
C
420 lines
12 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2016 by Roman Stolyarov
|
|
*
|
|
* 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 "lcd.h"
|
|
#include "system.h"
|
|
#include "cpu.h"
|
|
#include "string.h"
|
|
|
|
/* LCD pins */
|
|
#define PIN_BL_EN (32*4+0)
|
|
|
|
#define PIN_LCD_D0 (32*2+2)
|
|
#define PIN_LCD_D1 (32*2+3)
|
|
#define PIN_LCD_D2 (32*2+4)
|
|
#define PIN_LCD_D3 (32*2+5)
|
|
#define PIN_LCD_D4 (32*2+6)
|
|
#define PIN_LCD_D5 (32*2+7)
|
|
#define PIN_LCD_D6 (32*2+12)
|
|
#define PIN_LCD_D7 (32*2+13)
|
|
|
|
#define PIN_LCD_RD (32*2+8)
|
|
#define PIN_LCD_DC (32*2+9)
|
|
#define PIN_LCD_CS (32*2+14)
|
|
#define PIN_LCD_RES (32*2+18)
|
|
#define PIN_LCD_WR (32*2+19)
|
|
|
|
/* LCD setup codes */
|
|
#define LCD_SET_LOWER_COLUMN_ADDRESS ((char)0x00)
|
|
#define LCD_SET_HIGHER_COLUMN_ADDRESS ((char)0x10)
|
|
#define LCD_SET_DISPLAY_START_LINE ((char)0x40)
|
|
#define LCD_SET_CONTRAST_CONTROL_REGISTER ((char)0x81)
|
|
#define LCD_SET_CHARGE_PUMP ((char)0x8D)
|
|
#define LCD_SET_SEGMENT_REMAP ((char)0xA0)
|
|
#define LCD_SET_SEGMENT_REMAP_INV ((char)0xA1)
|
|
#define LCD_SET_ENTIRE_DISPLAY_OFF ((char)0xA4)
|
|
#define LCD_SET_ENTIRE_DISPLAY_ON ((char)0xA5)
|
|
#define LCD_SET_NORMAL_DISPLAY ((char)0xA6)
|
|
#define LCD_SET_REVERSE_DISPLAY ((char)0xA7)
|
|
#define LCD_SET_MULTIPLEX_RATIO ((char)0xA8)
|
|
#define LCD_SET_DC_DC ((char)0xAD)
|
|
#define LCD_SET_DISPLAY_OFF ((char)0xAE)
|
|
#define LCD_SET_DISPLAY_ON ((char)0xAF)
|
|
#define LCD_SET_PAGE_ADDRESS ((char)0xB0)
|
|
#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION ((char)0xC0)
|
|
#define LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV ((char)0xC8)
|
|
#define LCD_SET_DISPLAY_OFFSET ((char)0xD3)
|
|
#define LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ ((char)0xD5)
|
|
#define LCD_SET_VCOM_HW_CONFIGURATION ((char)0xDA)
|
|
#define LCD_SET_VCOM_DESELECT_LEVEL ((char)0xDB)
|
|
#define LCD_SET_PRECHARGE_PERIOD ((char)0xD9)
|
|
#define LCD_NOP ((char)0xE3)
|
|
|
|
/* LCD command codes */
|
|
#define LCD_CNTL_CONTRAST 0x81 /* Contrast */
|
|
#define LCD_CNTL_OUTSCAN 0xc8 /* Output scan direction */
|
|
#define LCD_CNTL_SEGREMAP 0xa1 /* Segment remap */
|
|
#define LCD_CNTL_DISPON 0xaf /* Display on */
|
|
|
|
#define LCD_CNTL_PAGE 0xb0 /* Page address */
|
|
#define LCD_CNTL_HIGHCOL 0x10 /* Upper column address */
|
|
#define LCD_CNTL_LOWCOL 0x00 /* Lower column address */
|
|
|
|
#define LCD_COL_OFFSET 2 /* column offset */
|
|
|
|
static inline void bitdelay(void)
|
|
{
|
|
unsigned int i = 15;
|
|
__asm__ __volatile__ (
|
|
".set noreorder \n"
|
|
"1: \n"
|
|
"bne %0, $0, 1b \n"
|
|
"addi %0, %0, -1 \n"
|
|
".set reorder \n"
|
|
: "=r" (i)
|
|
: "0" (i)
|
|
);
|
|
}
|
|
|
|
void lcd_hw_init(void)
|
|
{
|
|
REG_GPIO_PXFUNC(2) = 0x000C73FC; /* D0-D7 RD DC CS RES WR */
|
|
REG_GPIO_PXSELC(2) = 0x000C73FC;
|
|
REG_GPIO_PXDIRS(2) = 0x000C73FC;
|
|
REG_GPIO_PXDATS(2) = 0x000C73FC;
|
|
__gpio_clear_pin(PIN_BL_EN);
|
|
__gpio_as_output(PIN_BL_EN);
|
|
__gpio_clear_pin(PIN_LCD_RES);
|
|
udelay(1);
|
|
__gpio_set_pin(PIN_LCD_RES);
|
|
__gpio_clear_pin(PIN_LCD_CS);
|
|
}
|
|
|
|
void lcd_write_command(int byte)
|
|
{
|
|
__gpio_clear_pin(PIN_LCD_DC);
|
|
REG_GPIO_PXDATC(2) = 0x000030FC;
|
|
REG_GPIO_PXDATS(2) = ((byte & 0xC0) << 6) | ((byte & 0x3F) << 2);
|
|
__gpio_clear_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
__gpio_set_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
}
|
|
|
|
void lcd_write_data(const fb_data* p_bytes, int count)
|
|
{
|
|
__gpio_set_pin(PIN_LCD_DC);
|
|
while (count--)
|
|
{
|
|
REG_GPIO_PXDATC(2) = 0x000030FC;
|
|
REG_GPIO_PXDATS(2) = ((*p_bytes & 0xC0) << 6) | ((*p_bytes & 0x3F) << 2);
|
|
p_bytes++;
|
|
__gpio_clear_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
__gpio_set_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
}
|
|
}
|
|
|
|
void lcd_enable_power(bool onoff)
|
|
{
|
|
if (onoff)
|
|
__gpio_set_pin(PIN_BL_EN);
|
|
else
|
|
__gpio_clear_pin(PIN_BL_EN);
|
|
}
|
|
|
|
/** globals **/
|
|
|
|
static bool display_on = false; /* used by lcd_enable */
|
|
|
|
/*** hardware configuration ***/
|
|
|
|
void lcd_set_contrast(int val)
|
|
{
|
|
lcd_write_command(LCD_CNTL_CONTRAST);
|
|
lcd_write_command(val);
|
|
}
|
|
|
|
void lcd_set_invert_display(bool yesno)
|
|
{
|
|
if (yesno)
|
|
lcd_write_command(LCD_SET_REVERSE_DISPLAY);
|
|
else
|
|
lcd_write_command(LCD_SET_NORMAL_DISPLAY);
|
|
}
|
|
|
|
/* turn the display upside down (call lcd_update() afterwards) */
|
|
void lcd_set_flip(bool yesno)
|
|
{
|
|
if (yesno)
|
|
{
|
|
lcd_write_command(LCD_SET_SEGMENT_REMAP);
|
|
lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION);
|
|
}
|
|
else
|
|
{
|
|
lcd_write_command(LCD_SET_SEGMENT_REMAP_INV);
|
|
lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV);
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_LCD_ENABLE
|
|
void lcd_enable(bool enable)
|
|
{
|
|
if(display_on == enable)
|
|
return;
|
|
|
|
if( (display_on = enable) ) /* simple '=' is not a typo ! */
|
|
{
|
|
lcd_enable_power(enable);
|
|
lcd_write_command(LCD_SET_DISPLAY_ON);
|
|
send_event(LCD_EVENT_ACTIVATION, NULL);
|
|
}
|
|
else
|
|
{
|
|
lcd_write_command(LCD_SET_DISPLAY_OFF);
|
|
lcd_enable_power(enable);
|
|
}
|
|
}
|
|
|
|
bool lcd_active(void)
|
|
{
|
|
return display_on;
|
|
}
|
|
#endif
|
|
|
|
/* LCD init, largely based on what OF does */
|
|
void lcd_init_device(void)
|
|
{
|
|
int i;
|
|
|
|
lcd_hw_init();
|
|
|
|
/* Set display off */
|
|
lcd_write_command(LCD_SET_DISPLAY_OFF);
|
|
|
|
/* Set display clock and oscillator frequency */
|
|
lcd_write_command(LCD_SET_DISPLAY_CLOCK_AND_OSC_FREQ);
|
|
lcd_write_command(0x80);
|
|
|
|
/* Set multiplex ratio*/
|
|
lcd_write_command(LCD_SET_MULTIPLEX_RATIO);
|
|
lcd_write_command(0x3F);
|
|
|
|
/* Set display offset */
|
|
lcd_write_command(LCD_SET_DISPLAY_OFFSET);
|
|
lcd_write_command(0x00);
|
|
|
|
/* Set starting line as 0 */
|
|
lcd_write_command(LCD_SET_DISPLAY_START_LINE);
|
|
|
|
/* Set charge pump */
|
|
lcd_write_command(LCD_SET_CHARGE_PUMP);
|
|
lcd_write_command(0x14); /* VCC Generated by Internal DC/DC Circuit */
|
|
|
|
/* Column 131 is remapped to SEG0 */
|
|
lcd_write_command(LCD_SET_SEGMENT_REMAP_INV);
|
|
|
|
/* Invert COM scan direction (N-1 to 0) */
|
|
lcd_write_command(LCD_SET_COM_OUTPUT_SCAN_DIRECTION_INV);
|
|
|
|
/* Set COM hardware configuration */
|
|
lcd_write_command(LCD_SET_VCOM_HW_CONFIGURATION);
|
|
lcd_write_command(0x12);
|
|
|
|
/* Set contrast control */
|
|
lcd_write_command(LCD_SET_CONTRAST_CONTROL_REGISTER);
|
|
lcd_write_command(0xCF); /* VCC Generated by Internal DC/DC Circuit */
|
|
|
|
/* Set pre-charge period */
|
|
lcd_write_command(LCD_SET_PRECHARGE_PERIOD);
|
|
lcd_write_command(0xF1); /* VCC Generated by Internal DC/DC Circuit */
|
|
|
|
/* Set VCOM deselect level */
|
|
lcd_write_command(LCD_SET_VCOM_DESELECT_LEVEL);
|
|
lcd_write_command(0x40);
|
|
|
|
/* Set normal display mode (not every pixel ON) */
|
|
lcd_write_command(LCD_SET_ENTIRE_DISPLAY_OFF);
|
|
|
|
/* Set normal display mode (not inverted) */
|
|
lcd_write_command(LCD_SET_NORMAL_DISPLAY);
|
|
|
|
fb_data p_bytes[LCD_WIDTH + 2 * LCD_COL_OFFSET];
|
|
memset(p_bytes, 0, sizeof(p_bytes)); /* fills with 0 : pixel off */
|
|
for(i = 0; i < 8; i++)
|
|
{
|
|
lcd_write_command (LCD_SET_PAGE_ADDRESS | (i /*& 0xf*/));
|
|
lcd_write_data(p_bytes, LCD_WIDTH + 2 * LCD_COL_OFFSET);
|
|
}
|
|
|
|
lcd_enable(true);
|
|
|
|
lcd_update();
|
|
}
|
|
|
|
/*** Update functions ***/
|
|
|
|
/* Performance function that works with an external buffer
|
|
note that by and bheight are in 8-pixel units! */
|
|
void lcd_blit_mono(const unsigned char *data, int x, int by, int width,
|
|
int bheight, int stride)
|
|
{
|
|
if(!display_on)
|
|
return;
|
|
|
|
/* Copy display bitmap to hardware */
|
|
while (bheight--)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+LCD_COL_OFFSET)>>4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+LCD_COL_OFFSET) & 0xf));
|
|
|
|
lcd_write_data(data, width);
|
|
data += stride;
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef BOOTLOADER
|
|
/* Helper function for lcd_grey_phase_blit(). */
|
|
void lcd_grey_data(unsigned char *values, unsigned char *phases, int count) ICODE_ATTR;
|
|
void lcd_grey_data(unsigned char *values, unsigned char *phases, int count)
|
|
{
|
|
unsigned char a, b, c, d;
|
|
|
|
__gpio_set_pin(PIN_LCD_DC);
|
|
while(count--)
|
|
{
|
|
c = 0;
|
|
d = 8;
|
|
while(d--)
|
|
{
|
|
a = *phases;
|
|
b = *values++;
|
|
b += a & ~0x80;
|
|
*phases++ = b;
|
|
c <<= 1;
|
|
c |= a >> 7;
|
|
}
|
|
REG_GPIO_PXDATC(2) = 0x000030FC;
|
|
REG_GPIO_PXDATS(2) = ((c & 0xC0) << 6) | ((c & 0x3F) << 2);
|
|
__gpio_clear_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
__gpio_set_pin(PIN_LCD_WR);
|
|
bitdelay();
|
|
}
|
|
}
|
|
|
|
/* Performance function that works with an external buffer
|
|
note that by and bheight are in 8-pixel units! */
|
|
void lcd_blit_grey_phase(unsigned char *values, unsigned char *phases,
|
|
int x, int by, int width, int bheight, int stride)
|
|
{
|
|
if(!display_on)
|
|
return;
|
|
|
|
stride <<= 3; /* 8 pixels per block */
|
|
/* Copy display bitmap to hardware */
|
|
while (bheight--)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (by++ & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+LCD_COL_OFFSET)>>4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+LCD_COL_OFFSET) & 0xf));
|
|
|
|
lcd_grey_data(values, phases, width);
|
|
|
|
values += stride;
|
|
phases += stride;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* 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)
|
|
{
|
|
int y;
|
|
|
|
if(!display_on)
|
|
return;
|
|
|
|
/* Copy display bitmap to hardware */
|
|
for (y = 0; y < LCD_FBHEIGHT; y++)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | ((LCD_COL_OFFSET >> 4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | (LCD_COL_OFFSET & 0xf));
|
|
|
|
lcd_write_data (FBADDR(0, y), LCD_WIDTH);
|
|
}
|
|
}
|
|
|
|
/* 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)
|
|
{
|
|
int ymax;
|
|
|
|
if(!display_on)
|
|
return;
|
|
|
|
/* The Y coordinates have to work on even 8 pixel rows */
|
|
if (x < 0)
|
|
{
|
|
width += x;
|
|
x = 0;
|
|
}
|
|
|
|
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 (y < 0)
|
|
{
|
|
height += y;
|
|
y = 0;
|
|
}
|
|
|
|
if (y + height > LCD_HEIGHT)
|
|
height = LCD_HEIGHT - y;
|
|
|
|
if (height <= 0)
|
|
return; /* nothing left to do */
|
|
|
|
ymax = (y + height-1) >> 3;
|
|
y >>= 3;
|
|
|
|
/* Copy specified rectange bitmap to hardware */
|
|
for (; y <= ymax; y++)
|
|
{
|
|
lcd_write_command (LCD_CNTL_PAGE | (y & 0xf));
|
|
lcd_write_command (LCD_CNTL_HIGHCOL | (((x+LCD_COL_OFFSET) >> 4) & 0xf));
|
|
lcd_write_command (LCD_CNTL_LOWCOL | ((x+LCD_COL_OFFSET) & 0xf));
|
|
|
|
lcd_write_data (FBADDR(x,y), width);
|
|
}
|
|
}
|