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rockbox/firmware/target/arm/sandisk/sansa-e200/lcd-e200.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Rockbox driver for Sansa e200 LCDs
*
* Based on reverse engineering done my MrH
*
* Copyright (c) 2006 Daniel Ankers
*
* 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 "lcd.h"
#include "system.h"
#include <string.h>
#include "backlight-target.h"
#include "pp5024.h"
#define LCD_DATA_IN_GPIO GPIOB_INPUT_VAL
#define LCD_DATA_IN_PIN 6
#define LCD_DATA_OUT_GPIO GPIOB_OUTPUT_VAL
#define LCD_DATA_OUT_PIN 7
#define LCD_CLOCK_GPIO GPIOB_OUTPUT_VAL
#define LCD_CLOCK_PIN 5
#define LCD_CS_GPIO GPIOD_OUTPUT_VAL
#define LCD_CS_PIN 6
#define LCD_REG_0 (*(volatile unsigned long *)(0xc2000000))
#define LCD_REG_1 (*(volatile unsigned long *)(0xc2000004))
#define LCD_REG_2 (*(volatile unsigned long *)(0xc2000008))
#define LCD_REG_3 (*(volatile unsigned long *)(0xc200000c))
#define LCD_REG_4 (*(volatile unsigned long *)(0xc2000010))
#define LCD_REG_5 (*(volatile unsigned long *)(0xc2000014))
#define LCD_REG_6 (*(volatile unsigned long *)(0xc2000018))
#define LCD_REG_7 (*(volatile unsigned long *)(0xc200001c))
#define LCD_REG_8 (*(volatile unsigned long *)(0xc2000020))
#define LCD_REG_9 (*(volatile unsigned long *)(0xc2000024))
#define LCD_FB_BASE_REG (*(volatile unsigned long *)(0xc2000028))
/* We don't know how to receive a DMA finished signal from the LCD controller
* To avoid problems with flickering, we double-buffer the framebuffer and turn
* off DMA while updates are taking place */
static fb_data lcd_driver_framebuffer[LCD_FBHEIGHT][LCD_FBWIDTH]
__attribute__((aligned(16))); /* Same alignment as in lcd-16bit.c */
static inline void lcd_init_gpio(void)
{
GPIOB_ENABLE |= (1<<7);
GPIOB_ENABLE |= (1<<5);
GPIOB_OUTPUT_EN |= (1<<7);
GPIOB_OUTPUT_EN |= (1<<5);
GPIOD_ENABLE |= (1<<6);
GPIOD_OUTPUT_EN |= (1<<6);
}
static inline void lcd_bus_idle(void)
{
LCD_CLOCK_GPIO |= (1 << LCD_CLOCK_PIN);
LCD_DATA_OUT_GPIO |= (1 << LCD_DATA_OUT_PIN);
}
static inline void lcd_send_byte(unsigned char byte)
{
int i;
for (i = 7; i >=0 ; i--)
{
LCD_CLOCK_GPIO &= ~(1 << LCD_CLOCK_PIN);
if ((byte >> i) & 1)
{
LCD_DATA_OUT_GPIO |= (1 << LCD_DATA_OUT_PIN);
} else {
LCD_DATA_OUT_GPIO &= ~(1 << LCD_DATA_OUT_PIN);
}
udelay(1);
LCD_CLOCK_GPIO |= (1 << LCD_CLOCK_PIN);
udelay(1);
lcd_bus_idle();
udelay(3);
}
}
static inline void lcd_send_msg(unsigned char cmd, unsigned int data)
{
lcd_bus_idle();
udelay(1);
LCD_CS_GPIO &= ~(1 << LCD_CS_PIN);
udelay(10);
lcd_send_byte(cmd);
lcd_send_byte((unsigned char)(data >> 8));
lcd_send_byte((unsigned char)(data & 0xff));
LCD_CS_GPIO |= (1 << LCD_CS_PIN);
udelay(1);
lcd_bus_idle();
}
static inline void lcd_write_reg(unsigned int reg, unsigned int data)
{
lcd_send_msg(0x70, reg);
lcd_send_msg(0x72, data);
}
/* The LCD controller gets passed the address of the framebuffer, but can only
use the physical, not the remapped, address. This is a quick and dirty way
of correcting it */
static unsigned long phys_fb_address(unsigned long address)
{
if(address < 0x10000000)
{
return address + 0x10000000;
} else {
return address;
}
}
inline void lcd_init_device(void)
{
/* All this is magic worked out by MrH */
/* Stop any DMA which is in progress */
LCD_REG_6 &= ~1;
udelay(100000);
/* Init GPIO ports */
lcd_init_gpio();
/* Controller init */
outl((inl(0x70000084) | (1 << 28)), 0x70000084);
outl((inl(0x70000080) & ~(1 << 28)), 0x70000080);
outl(((inl(0x70000010) & (0x03ffffff)) | (0x15 << 26)), 0x70000010);
outl(((inl(0x70000014) & (0x0fffffff)) | (0x5 << 28)), 0x70000014);
outl((inl(0x70000020) & ~(0x3 << 10)), 0x70000020);
DEV_EN |= DEV_LCD; /* Enable controller */
outl(0x6, 0x600060d0);
DEV_RS |= DEV_LCD; /* Reset controller */
outl((inl(0x70000020) & ~(1 << 14)), 0x70000020);
lcd_bus_idle();
DEV_RS &=~DEV_LCD; /* Clear reset */
udelay(1000);
LCD_REG_0 = (LCD_REG_0 & (0x00ffffff)) | (0x22 << 24);
LCD_REG_0 = (LCD_REG_0 & (0xff00ffff)) | (0x14 << 16);
LCD_REG_0 = (LCD_REG_0 & (0xffffc0ff)) | (0x3 << 8);
LCD_REG_0 = (LCD_REG_0 & (0xffffffc0)) | (0xa);
LCD_REG_1 &= 0x00ffffff;
LCD_REG_1 &= 0xff00ffff;
LCD_REG_1 = (LCD_REG_1 & 0xffff03ff) | (0x2 << 10);
LCD_REG_1 = (LCD_REG_1 & 0xfffffc00) | (0xdd);
LCD_REG_2 |= (1 << 5);
LCD_REG_2 |= (1 << 6);
LCD_REG_2 = (LCD_REG_2 & 0xfffffcff) | (0x2 << 8);
LCD_REG_7 &= (0xf800ffff);
LCD_REG_7 &= (0xfffff800);
LCD_REG_8 = (LCD_REG_8 & (0xf800ffff)) | (0xb0 << 16);
LCD_REG_8 = (LCD_REG_8 & (0xfffff800)) | (0xde); /* X-Y Geometry? */
LCD_REG_5 |= 0xc;
LCD_REG_5 = (LCD_REG_5 & ~(0x70)) | (0x3 << 4);
LCD_REG_5 |= 2;
LCD_REG_6 &= ~(1 << 15);
LCD_REG_6 |= (0xe00);
LCD_REG_6 = (LCD_REG_6 & (0xffffff1f)) | (0x4 << 5);
LCD_REG_6 |= (1 << 4);
LCD_REG_5 &= ~(1 << 7);
LCD_FB_BASE_REG = phys_fb_address((unsigned long)lcd_driver_framebuffer);
udelay(100000);
/* LCD init */
outl((inl(0x70000080) & ~(1 << 28)), 0x70000080);
udelay(10000);
outl((inl(0x70000080) | (1 << 28)), 0x70000080);
udelay(10000);
lcd_write_reg(16, 0x4444);
lcd_write_reg(17, 0x0001);
lcd_write_reg(18, 0x0003);
lcd_write_reg(19, 0x1119);
lcd_write_reg(18, 0x0013);
udelay(50000);
lcd_write_reg(16, 0x4440);
lcd_write_reg(19, 0x3119);
udelay(150000);
lcd_write_reg(1, 0x101b);
lcd_write_reg(2, 0x0700);
lcd_write_reg(3, 0x6020);
lcd_write_reg(4, 0x0000);
lcd_write_reg(5, 0x0000);
lcd_write_reg(8, 0x0102);
lcd_write_reg(9, 0x0000);
lcd_write_reg(11, 0x4400);
lcd_write_reg(12, 0x0110);
lcd_write_reg(64, 0x0000);
lcd_write_reg(65, 0x0000);
lcd_write_reg(66, (219 << 8)); /* Screen resolution? */
lcd_write_reg(67, 0x0000);
lcd_write_reg(68, (175 << 8));
lcd_write_reg(69, (219 << 8));
lcd_write_reg(48, 0x0000);
lcd_write_reg(49, 0x0704);
lcd_write_reg(50, 0x0107);
lcd_write_reg(51, 0x0704);
lcd_write_reg(52, 0x0107);
lcd_write_reg(53, 0x0002);
lcd_write_reg(54, 0x0707);
lcd_write_reg(55, 0x0503);
lcd_write_reg(56, 0x0000);
lcd_write_reg(57, 0x0000);
lcd_write_reg(33, 175);
lcd_write_reg(12, 0x0110);
lcd_write_reg(16, 0x4740);
lcd_write_reg(7, 0x0045);
udelay(50000);
lcd_write_reg(7, 0x0065);
lcd_write_reg(7, 0x0067);
udelay(50000);
lcd_write_reg(7, 0x0077);
lcd_send_msg(0x70, 34);
}
void lcd_enable(bool on)
{
if(on)
{
DEV_EN |= DEV_LCD; /* Enable LCD controller */
LCD_REG_6 |= 1; /* Enable DMA */
}
else
{
if(DEV_EN & DEV_LCD)
{
LCD_REG_6 &= ~1; /* Disable DMA */
udelay(20000); /* Wait for dma end (assuming 50Hz) */
DEV_EN &= ~DEV_LCD; /* Disable LCD controller */
}
}
}
inline void lcd_update_rect(int x, int y, int width, int height)
{
(void)x;
(void)width;
if(__backlight_is_on())
{
/* Turn off DMA and wait for the transfer to complete */
/* TODO: Work out the proper delay */
LCD_REG_6 &= ~1;
udelay(1000);
/* Copy the Rockbox framebuffer to the second framebuffer */
/* TODO: Move the second framebuffer into uncached SDRAM */
memcpy(((char*)&lcd_driver_framebuffer)+(y * sizeof(fb_data) * LCD_WIDTH),
((char *)&lcd_framebuffer)+(y * sizeof(fb_data) * LCD_WIDTH),
((height * sizeof(fb_data) * LCD_WIDTH)));
flush_icache();
/* Restart DMA */
LCD_REG_6 |= 1;
}
}
inline void lcd_update(void)
{
if(__backlight_is_on())
{
/* TODO: It may be faster to swap the addresses of lcd_driver_framebuffer
* and lcd_framebuffer */
/* Turn off DMA and wait for the transfer to complete */
LCD_REG_6 &= ~1;
udelay(1000);
/* Copy the Rockbox framebuffer to the second framebuffer */
memcpy(lcd_driver_framebuffer, lcd_framebuffer,
sizeof(fb_data) * LCD_WIDTH * LCD_HEIGHT);
flush_icache();
/* Restart DMA */
LCD_REG_6 |= 1;
}
}
/*** hardware configuration ***/
void lcd_set_contrast(int val)
{
/* TODO: Implement lcd_set_contrast() */
(void)val;
}
void lcd_set_invert_display(bool yesno)
{
/* TODO: Implement lcd_set_invert_display() */
(void)yesno;
}
/* turn the display upside down (call lcd_update() afterwards) */
void lcd_set_flip(bool yesno)
{
/* TODO: Implement lcd_set_flip() */
(void)yesno;
}
/* Blitting functions */
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;
}
/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */
extern void lcd_write_yuv420_lines(fb_data *dst,
unsigned char chroma_buf[LCD_HEIGHT/2*3],
unsigned char const * const src[3],
int width,
int stride);
/* Performance function to blit a YUV bitmap directly to the LCD */
/* For the e200 - show it rotated */
/* So the LCD_WIDTH is now the height */
void lcd_yuv_blit(unsigned char * const src[3],
int src_x, int src_y, int stride,
int x, int y, int width, int height)
{
/* Caches for chroma data so it only need be recaculated every other
line */
static unsigned char chroma_buf[LCD_HEIGHT/2*3]; /* 330 bytes */
unsigned char const * yuv_src[3];
off_t z;
/* Sorry, but width and height must be >= 2 or else */
width &= ~1;
height >>= 1;
fb_data *dst = (fb_data*)lcd_driver_framebuffer +
x * LCD_WIDTH + (LCD_WIDTH - y) - 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]);
do
{
lcd_write_yuv420_lines(dst, chroma_buf, 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;
dst -= 2;
}
while (--height > 0);
}
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