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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Rockbox driver for Sansa View LCDs
*
* Copyright (c) 2009 Robert Keevil
*
* 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 <string.h>
#include "cpu.h"
#include "kernel.h"
#include "system.h"
#include "backlight-target.h"
#include "lcd.h"
static bool display_on SHAREDBSS_ATTR = true;
static int lcd_type;
#define LCD_DATA_OUT_GPIO GPIOH_OUTPUT_VAL
#define LCD_DATA_OUT_PIN 4
#define LCD_CLOCK_GPIO GPIOH_OUTPUT_VAL
#define LCD_CLOCK_PIN 6
#define LCD_CS_GPIO GPIOH_OUTPUT_VAL
#define LCD_CS_PIN 7
static void lcd_init_gpio(void)
{
DEV_INIT1 |= 0xfc000000;
DEV_INIT3 |= 0xc300000;
GPIOE_ENABLE = 0;
GPIOM_ENABLE &= ~0x3;
GPIOF_ENABLE = 0;
GPIOJ_ENABLE &= ~0x1a;
// reset low
GPIOB_ENABLE &= ~0x8;
// SPI chip select
GPIOH_OUTPUT_VAL |= 0x80;
GPIOH_OUTPUT_EN |= 0x80;
GPIOH_ENABLE |= 0x80;
// SPI clock
GPIOH_OUTPUT_VAL |= 0x40;
GPIOH_OUTPUT_EN |= 0x40;
GPIOH_ENABLE |= 0x40;
// unk
GPIOH_OUTPUT_VAL |= 0x20;
GPIOH_OUTPUT_EN |= 0x20;
GPIOH_ENABLE |= 0x20;
// SPI data
GPIOH_OUTPUT_VAL |= 0x10;
GPIOH_OUTPUT_EN |= 0x10;
GPIOH_ENABLE |= 0x10;
// LCD reset
GPIOB_OUTPUT_VAL |= 0x4;
GPIOB_ENABLE |= 0x4;
GPIOB_OUTPUT_EN |= 0x4;
DEV_INIT2 = 0x40000000;
// LCD type
GPIOG_ENABLE |= 0x8;
GPIOG_OUTPUT_EN &= ~0x8;
if(GPIOG_INPUT_VAL & 0x8)
lcd_type = 0;
else
lcd_type = 1;
}
static void lcd_send_msg(unsigned char count, unsigned int data)
{
GPIO_SET_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
GPIO_CLEAR_BITWISE(LCD_CS_GPIO, 1 << LCD_CS_PIN);
for(int i = count - 1; i >= 0; i--)
{
if(data & (1 << i))
GPIO_SET_BITWISE(LCD_DATA_OUT_GPIO, 1 << LCD_DATA_OUT_PIN);
else
GPIO_CLEAR_BITWISE(LCD_DATA_OUT_GPIO, 1 << LCD_DATA_OUT_PIN);
GPIO_CLEAR_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
udelay(1);
GPIO_SET_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
udelay(2);
}
GPIO_SET_BITWISE(LCD_CS_GPIO, 1 << LCD_CS_PIN);
}
static void lcd_send_cmd(unsigned int cmd)
{
lcd_send_msg(24, (0x700000 | cmd));
}
static void lcd_send_data(unsigned int data)
{
lcd_send_msg(24, (0x720000 | data));
}
static void lcd_write_reg(unsigned int cmd, unsigned int data)
{
lcd_send_cmd(cmd);
lcd_send_data(data);
}
void lcd_reset(void)
{
GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x4);
udelay(1000);
GPIO_CLEAR_BITWISE(GPIOB_OUTPUT_VAL, 0x4);
udelay(10000);
GPIO_SET_BITWISE(GPIOB_OUTPUT_VAL, 0x4);
udelay(50000);
}
/* Run the powerup sequence for the driver IC */
static void lcd_power_on(void)
{
lcd_init_gpio();
lcd_reset();
lcd_write_reg(0xE5, 0x8000);
lcd_write_reg(0x0, 0x1);
lcd_write_reg(0x1, 0x100);
lcd_write_reg(0x2, 0x700);
lcd_write_reg(0x3, 0x5230);
lcd_write_reg(0x4, 0x0);
lcd_write_reg(0x8, 0x408); /* back porch = 8, front porch = 4 */
lcd_write_reg(0x9, 0x0);
lcd_write_reg(0xa, 0x0);
lcd_write_reg(0xd, 0x0);
lcd_write_reg(0xf, 0x2);
lcd_write_reg(0x10, 0x0);
lcd_write_reg(0x11, 0x0);
lcd_write_reg(0x12, 0x0);
lcd_write_reg(0x13, 0x0);
sleep(HZ/5);
lcd_write_reg(0x10, 0x17B0);
lcd_write_reg(0x11, 0x7);
sleep(HZ/20);
lcd_write_reg(0x12, 0x13c);
sleep(HZ/20);
if (lcd_type == 0)
{
lcd_write_reg(0x13, 0x1700);
lcd_write_reg(0x29, 0x10);
sleep(HZ/10);
lcd_write_reg(0x20, 0x0);
lcd_write_reg(0x21, 0x0);
lcd_write_reg(0x30, 0x7);
lcd_write_reg(0x31, 0x403);
lcd_write_reg(0x32, 0x400);
lcd_write_reg(0x35, 0x3);
lcd_write_reg(0x36, 0xF07);
lcd_write_reg(0x37, 0x606);
lcd_write_reg(0x38, 0x106);
lcd_write_reg(0x39, 0x7);
}
else
{
lcd_write_reg(0x13, 0x1800);
lcd_write_reg(0x29, 0x13);
sleep(HZ/10);
lcd_write_reg(0x20, 0x0);
lcd_write_reg(0x21, 0x0);
lcd_write_reg(0x30, 0x2);
lcd_write_reg(0x31, 0x606);
lcd_write_reg(0x32, 0x501);
lcd_write_reg(0x35, 0x206);
lcd_write_reg(0x36, 0x504);
lcd_write_reg(0x37, 0x707);
lcd_write_reg(0x38, 0x306);
lcd_write_reg(0x39, 0x7);
}
lcd_write_reg(0x3c, 0x700);
lcd_write_reg(0x3d, 0x700);
lcd_write_reg(0x50, 0x0);
lcd_write_reg(0x51, 0xef);
lcd_write_reg(0x52, 0x0);
lcd_write_reg(0x53, 0x13f);
lcd_write_reg(0x60, 0x2700);
lcd_write_reg(0x61, 0x1);
lcd_write_reg(0x6a, 0x0);
lcd_write_reg(0x80, 0x0);
lcd_write_reg(0x81, 0x0);
lcd_write_reg(0x82, 0x0);
lcd_write_reg(0x83, 0x0);
lcd_write_reg(0x84, 0x0);
lcd_write_reg(0x85, 0x0);
lcd_write_reg(0x90, 0x10);
lcd_write_reg(0x92, 0x0);
lcd_write_reg(0x93, 0x3);
lcd_write_reg(0x95, 0x110);
lcd_write_reg(0x97, 0x0);
lcd_write_reg(0x98, 0x0);
lcd_write_reg(0xc, 0x000); // SYSTEM mode
lcd_write_reg(0x7, 0x173);
sleep(HZ/10);
}
{
lcd_power_on();
lcd_write_reg(0x7, 0x160);
lcd_write_reg(0x10, 0x17B1);
}
void unknown03(bool r0)
{
if (r0)
GPIOJ_ENABLE &= ~0x2;
else
{
GPIOJ_ENABLE |= 0x2;
GPIOJ_OUTPUT_EN |= 0x2;
GPIOJ_OUTPUT_VAL &= ~0x02;
}
}
void lcd_init_device(void)
{
lcd_power_on();
}
#if defined(HAVE_LCD_ENABLE)
bool lcd_active(void)
{
return display_on;
}
void lcd_enable(bool on)
{
display_on = on;
if(on)
{
lcd_write_reg(0x10, 0x17B0);
udelay(100);
lcd_write_reg(0x7, 0x173);
}
else
{
lcd_write_reg(0x7, 0x160);
lcd_write_reg(0x10, 0x17B1);
}
}
#endif
static inline void lcd_send_frame_byte(unsigned char data)
{
for(int bit = 0; bit < 8; bit++)
{
if(data & 0x80)
GPIO_SET_BITWISE(LCD_DATA_OUT_GPIO, 1 << LCD_DATA_OUT_PIN);
else
GPIO_CLEAR_BITWISE(LCD_DATA_OUT_GPIO, 1 << LCD_DATA_OUT_PIN);
data <<= 1;
GPIO_CLEAR_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
GPIO_SET_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
}
}
static void lcd_send_frame(const fb_data *addr, int count)
{
GPIO_SET_BITWISE(LCD_CLOCK_GPIO, 1 << LCD_CLOCK_PIN);
GPIO_CLEAR_BITWISE(LCD_CS_GPIO, 1 << LCD_CS_PIN);
lcd_send_frame_byte(0x72);
while(count-- > 0)
{
lcd_send_frame_byte(*addr >> 8);
lcd_send_frame_byte(*addr++ & 0xff);
}
GPIO_SET_BITWISE(LCD_CS_GPIO, 1 << LCD_CS_PIN);
}
void lcd_update(void)
{
if(!display_on)
return;
lcd_write_reg(0x20, 0x0);
lcd_write_reg(0x21, 0x0);
lcd_send_cmd(0x22);
lcd_send_frame(FBADDR(0, 0), LCD_WIDTH * LCD_HEIGHT);
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
(void)x;
(void)y;
(void)width;
(void)height;
lcd_update();
}
/*** 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;
}
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