Nyaaori/rockbox
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity
rockbox/firmware/drivers/lcd-ipod.c
Dave Chapman b0ad4cfbb5 Implement contrast setting for iPod greyscale LCD 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8643 a1c6a512-1295-4272-9138-f99709370657
2006-02-09 19:47:52 +00:00

490 lines
12 KiB
C
Raw Blame History

/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Rockbox driver for iPod LCDs
*
* Based on code from the ipodlinux project - http://ipodlinux.org/
* Adapted for Rockbox in November 2005
*
* Original file: linux/arch/armnommu/mach-ipod/fb.c
*
* Copyright (c) 2003-2005 Bernard Leach (leachbj@bouncycastle.org)
*
* 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 "system.h"
/* check if number of useconds has past */
static int timer_check(int clock_start, int usecs)
{
if ( ((int)(USEC_TIMER - clock_start)) >= usecs ) {
return 1;
} else {
return 0;
}
}
#if (CONFIG_LCD == LCD_IPOD2BPP)
/*** hardware configuration ***/
#if CONFIG_CPU == PP5002
#define IPOD_LCD_BASE 0xc0001000
#define IPOD_LCD_BUSY_MASK 0x80000000
#else /* PP5020 */
#define IPOD_LCD_BASE 0x70003000
#define IPOD_LCD_BUSY_MASK 0x00008000
#endif
/* LCD command codes for HD66789R */
#define LCD_CMD 0x08
#define LCD_DATA 0x10
static unsigned int lcd_contrast = 0x6a;
/* wait for LCD with timeout */
static void lcd_wait_write(void)
{
int start = USEC_TIMER;
do {
if ((inl(IPOD_LCD_BASE) & 0x8000) == 0) break;
} while (timer_check(start, 1000) == 0);
}
/* send LCD data */
static void lcd_send_data(int data_lo, int data_hi)
{
lcd_wait_write();
outl(data_lo, IPOD_LCD_BASE + LCD_DATA);
lcd_wait_write();
outl(data_hi, IPOD_LCD_BASE + LCD_DATA);
}
/* send LCD command */
static void lcd_prepare_cmd(int cmd)
{
lcd_wait_write();
outl(0x0, IPOD_LCD_BASE + LCD_CMD);
lcd_wait_write();
outl(cmd, IPOD_LCD_BASE + LCD_CMD);
}
/* send LCD command and data */
static void lcd_cmd_and_data(int cmd, int data_lo, int data_hi)
{
lcd_prepare_cmd(cmd);
lcd_send_data(data_lo, data_hi);
}
/**
*
* LCD init
**/
void lcd_init_device(void){
/* driver output control - 160x128 */
lcd_cmd_and_data(0x1, 0x1, 0xf);
lcd_cmd_and_data(0x5, 0x0, 0x10);
#ifdef APPLE_IPOD4G
outl(inl(0x6000d004) | 0x4, 0x6000d004); /* B02 enable */
outl(inl(0x6000d004) | 0x8, 0x6000d004); /* B03 enable */
outl(inl(0x70000084) | 0x2000000, 0x70000084); /* D01 enable */
outl(inl(0x70000080) | 0x2000000, 0x70000080); /* D01 =1 */
outl(inl(0x6000600c) | 0x20000, 0x6000600c); /* PWM enable */
#endif
}
/*** update functions ***/
/* srccopy bitblt, opcode is currently ignored*/
/* Performance function that works with an external buffer
note that x and bwidtht are in 8-pixel units! */
void lcd_blit(const unsigned char* data, int x, int by, int width,
int bheight, int stride)
{
/* TODO implement this on iPod */
(void)data;
(void)x;
(void)by;
(void)width;
(void)bheight;
(void)stride;
}
/* 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)
{
/* TODO Implement lcd_roll() */
lines &= LCD_HEIGHT-1;
}
/*** hardware configuration ***/
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
/* Rockbox stores the contrast as 0..63 - we add 64 to it */
void lcd_set_contrast(int val)
{
if (val < 0) val = 0;
else if (val > 63) val = 63;
lcd_cmd_and_data(0x4, 0x4, val + 64);
lcd_contrast = 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;
}
void lcd_update_rect(int x, int y, int width, int height)
{
int cursor_pos, xx;
int ny;
int sx = x, sy = y, mx = width, my = height;
/* only update the ipod if we are writing to the screen */
sx >>= 3;
//mx = (mx+7)>>3;
mx >>= 3;
cursor_pos = sx + (sy << 5);
for ( ny = sy; ny <= my; ny++ ) {
unsigned char * img_data;
// move the cursor
lcd_cmd_and_data(0x11, cursor_pos >> 8, cursor_pos & 0xff);
// setup for printing
lcd_prepare_cmd(0x12);
img_data = &lcd_framebuffer[ny][sx<<1];
// 160/8 -> 20 == loops 20 times
// make sure we loop at least once
for ( xx = sx; xx <= mx; xx++ ) {
// display a character
lcd_send_data(*(img_data+1), *img_data);
img_data += 2;
}
// update cursor pos counter
cursor_pos += 0x20;
}
}
/** Switch on or off the backlight **/
void lcd_enable (bool on){
int lcd_state;
lcd_state = inl(IPOD_LCD_BASE);
if (on){
lcd_state = lcd_state | 0x2;
outl(lcd_state, IPOD_LCD_BASE);
lcd_cmd_and_data(0x7, 0x0, 0x11);
}
else {
lcd_state = lcd_state & ~0x2;
outl(lcd_state, IPOD_LCD_BASE);
lcd_cmd_and_data(0x7, 0x0, 0x9);
}
}
#else
#define IPOD_LCD_BASE 0x70008a0c
#define IPOD_LCD_BUSY_MASK 0x80000000
/* LCD command codes for HD66789R */
#define LCD_CNTL_RAM_ADDR_SET 0x21
#define LCD_CNTL_WRITE_TO_GRAM 0x22
#define LCD_CNTL_HORIZ_RAM_ADDR_POS 0x44
#define LCD_CNTL_VERT_RAM_ADDR_POS 0x45
/*** globals ***/
static int lcd_type = 1; /* 0 = "old" Color/Photo, 1 = "new" Color & Nano */
static void lcd_wait_write(void)
{
if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) != 0) {
int start = USEC_TIMER;
do {
if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) == 0) break;
} while (timer_check(start, 1000) == 0);
}
}
static void lcd_send_lo(int v)
{
lcd_wait_write();
outl(v | 0x80000000, IPOD_LCD_BASE);
}
static void lcd_send_hi(int v)
{
lcd_wait_write();
outl(v | 0x81000000, IPOD_LCD_BASE);
}
static void lcd_cmd_data(int cmd, int data)
{
if (lcd_type == 0) {
lcd_send_lo(cmd);
lcd_send_lo(data);
} else {
lcd_send_lo(0x0);
lcd_send_lo(cmd);
lcd_send_hi((data >> 8) & 0xff);
lcd_send_hi(data & 0xff);
}
}
/*** 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;
}
/* 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)
{
/* TODO: Implement lcd_roll() */
lines &= LCD_HEIGHT-1;
}
/* LCD init */
void lcd_init_device(void)
{
#if CONFIG_LCD == LCD_IPODCOLOR
if (ipod_hw_rev == 0x60000) {
lcd_type = 0;
} else {
int gpio_a01, gpio_a04;
/* A01 */
gpio_a01 = (inl(0x6000D030) & 0x2) >> 1;
/* A04 */
gpio_a04 = (inl(0x6000D030) & 0x10) >> 4;
if (((gpio_a01 << 1) | gpio_a04) == 0 || ((gpio_a01 << 1) | gpio_a04) == 2) {
lcd_type = 0;
} else {
lcd_type = 1;
}
}
outl(inl(0x6000d004) | 0x4, 0x6000d004); /* B02 enable */
outl(inl(0x6000d004) | 0x8, 0x6000d004); /* B03 enable */
outl(inl(0x70000084) | 0x2000000, 0x70000084); /* D01 enable */
outl(inl(0x70000080) | 0x2000000, 0x70000080); /* D01 =1 */
outl(inl(0x6000600c) | 0x20000, 0x6000600c); /* PWM enable */
#elif CONFIG_LCD == LCD_IPODNANO
/* iPodLinux doesn't appear have any LCD init code for the Nano */
#endif
}
/*** update functions ***/
/* Performance function that works with an external buffer
note that by and bheight are in 4-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;
}
/* Update a fraction of the display. */
void lcd_update_rect(int x, int y, int width, int height)
{
int y0, x0, y1, x1;
int newx,newwidth;
unsigned long *addr = (unsigned long *)lcd_framebuffer;
/* Ensure x and width are both even - so we can read 32-bit aligned
data from lcd_framebuffer */
newx=x&~1;
newwidth=width&~1;
if (newx+newwidth < x+width) { newwidth+=2; }
x=newx; width=newwidth;
/* calculate the drawing region */
#if CONFIG_LCD == LCD_IPODNANO
y0 = x; /* start horiz */
x0 = y; /* start vert */
y1 = (x + width) - 1; /* max horiz */
x1 = (y + height) - 1; /* max vert */
#elif CONFIG_LCD == LCD_IPODCOLOR
y0 = y; /* start vert */
x0 = (LCD_WIDTH - 1) - x; /* start horiz */
y1 = (y + height) - 1; /* end vert */
x1 = (x0 - width) + 1; /* end horiz */
#endif
/* setup the drawing region */
if (lcd_type == 0) {
lcd_cmd_data(0x12, y0); /* start vert */
lcd_cmd_data(0x13, x0); /* start horiz */
lcd_cmd_data(0x15, y1); /* end vert */
lcd_cmd_data(0x16, x1); /* end horiz */
} else {
/* swap max horiz < start horiz */
if (y1 < y0) {
int t;
t = y0;
y0 = y1;
y1 = t;
}
/* swap max vert < start vert */
if (x1 < x0) {
int t;
t = x0;
x0 = x1;
x1 = t;
}
/* max horiz << 8 | start horiz */
lcd_cmd_data(LCD_CNTL_HORIZ_RAM_ADDR_POS, (y1 << 8) | y0);
/* max vert << 8 | start vert */
lcd_cmd_data(LCD_CNTL_VERT_RAM_ADDR_POS, (x1 << 8) | x0);
/* start vert = max vert */
#if CONFIG_LCD == LCD_IPODCOLOR
x0 = x1;
#endif
/* position cursor (set AD0-AD15) */
/* start vert << 8 | start horiz */
lcd_cmd_data(LCD_CNTL_RAM_ADDR_SET, ((x0 << 8) | y0));
/* start drawing */
lcd_send_lo(0x0);
lcd_send_lo(LCD_CNTL_WRITE_TO_GRAM);
}
addr = (unsigned long*)&lcd_framebuffer[y][x];
while (height > 0) {
int c, r;
int h, pixels_to_write;
pixels_to_write = (width * height) * 2;
h = height;
/* calculate how much we can do in one go */
if (pixels_to_write > 64000) {
h = (64000/2) / width;
pixels_to_write = (width * h) * 2;
}
outl(0x10000080, 0x70008a20);
outl((pixels_to_write - 1) | 0xc0010000, 0x70008a24);
outl(0x34000000, 0x70008a20);
/* for each row */
for (r = 0; r < h; r++) {
/* for each column */
for (c = 0; c < width; c += 2) {
while ((inl(0x70008a20) & 0x1000000) == 0);
/* output 2 pixels */
outl(*(addr++), 0x70008b00);
}
addr += (LCD_WIDTH - width)/2;
}
while ((inl(0x70008a20) & 0x4000000) == 0);
outl(0x0, 0x70008a24);
height = height - h;
}
}
/* Update the display.
This must be called after all other LCD functions that change the display. */
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
#endif
Reference in a new issue View git blame Copy permalink