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rockbox/firmware/drivers/lcd-ipod.c
Dave Chapman d31a32c501 iPod: Code cleanup - the bootloader now compiles with zero warnings 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7812 a1c6a512-1295-4272-9138-f99709370657
2005-11-11 17:51:35 +00:00

331 lines
9 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2005 by Dave Chapman
*
* Rockbox driver for iPod LCDs
*
* Based on code from ipodlinux - http://ipodlinux.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"
/*** definitions ***/
#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084)))
/* LCD command codes */
#define LCD_CNTL_POWER_CONTROL 0x25
#define LCD_CNTL_VOLTAGE_SELECT 0x2b
#define LCD_CNTL_LINE_INVERT_DRIVE 0x36
#define LCD_CNTL_GRAY_SCALE_PATTERN 0x39
#define LCD_CNTL_TEMP_GRADIENT_SELECT 0x4e
#define LCD_CNTL_OSC_FREQUENCY 0x5f
#define LCD_CNTL_ON_OFF 0xae
#define LCD_CNTL_OSC_ON_OFF 0xaa
#define LCD_CNTL_OFF_MODE 0xbe
#define LCD_CNTL_REVERSE 0xa6
#define LCD_CNTL_ALL_LIGHTING 0xa4
#define LCD_CNTL_COMMON_OUTPUT_STATUS 0xc4
#define LCD_CNTL_COLUMN_ADDRESS_DIR 0xa0
#define LCD_CNTL_NLINE_ON_OFF 0xe4
#define LCD_CNTL_DISPLAY_MODE 0x66
#define LCD_CNTL_DUTY_SET 0x6d
#define LCD_CNTL_ELECTRONIC_VOLUME 0x81
#define LCD_CNTL_DATA_INPUT_DIR 0x84
#define LCD_CNTL_DISPLAY_START_LINE 0x8a
#define LCD_CNTL_PAGE 0xb1
#define LCD_CNTL_COLUMN 0x13
#define LCD_CNTL_DATA_WRITE 0x1d
/*** globals ***/
static int lcd_type = 1; /* 0 = "old" Color/Photo, 1 = "new" Color & Nano */
#define IPOD_PP5020_RTC 0x60005010
#define LCD_DATA 0x10
#define LCD_CMD 0x08
#define IPOD_LCD_BASE 0x70008a0c
#define IPOD_LCD_BUSY_MASK 0x80000000
static int timer_get_current(void)
{
return inl(IPOD_PP5020_RTC);
}
/* check if number of useconds has past */
static int timer_check(unsigned long clock_start, unsigned long usecs)
{
unsigned long clock;
clock = inl(IPOD_PP5020_RTC);
if ( (clock - clock_start) >= usecs ) {
return 1;
} else {
return 0;
}
}
static void lcd_wait_write(void)
{
if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) != 0) {
int start = timer_get_current();
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, 0x70008A0C);
}
static void lcd_send_hi(int v)
{
lcd_wait_write();
outl(v | 0x81000000, 0x70008A0C);
}
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 ***/
int lcd_default_contrast(void)
{
return 28;
}
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_REVISION == 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 */
if (lcd_type == 0) {
lcd_cmd_data(0xef, 0x0);
lcd_cmd_data(0x1, 0x0);
lcd_cmd_data(0x80, 0x1);
lcd_cmd_data(0x10, 0x8);
lcd_cmd_data(0x18, 0x6);
lcd_cmd_data(0x7e, 0x4);
lcd_cmd_data(0x7e, 0x5);
lcd_cmd_data(0x7f, 0x1);
}
#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 unsigned char* 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 rect1, rect2, rect3, rect4;
unsigned short *addr = (unsigned short *)lcd_framebuffer;
/* calculate the drawing region */
#if CONFIG_LCD == LCD_IPODCOLOR
rect1 = x; /* start vert */
rect2 = (LCD_WIDTH - 1) - y; /* start horiz */
rect3 = (x + height) - 1; /* end vert */
rect4 = (rect2 - width) + 1; /* end horiz */
#else
rect1 = y; /* start horiz */
rect2 = x; /* start vert */
rect3 = (y + width) - 1; /* max horiz */
rect4 = (x + height) - 1; /* max vert */
#endif
/* setup the drawing region */
if (lcd_type == 0) {
lcd_cmd_data(0x12, rect1); /* start vert */
lcd_cmd_data(0x13, rect2); /* start horiz */
lcd_cmd_data(0x15, rect3); /* end vert */
lcd_cmd_data(0x16, rect4); /* end horiz */
} else {
/* swap max horiz < start horiz */
if (rect3 < rect1) {
int t;
t = rect1;
rect1 = rect3;
rect3 = t;
}
/* swap max vert < start vert */
if (rect4 < rect2) {
int t;
t = rect2;
rect2 = rect4;
rect4 = t;
}
/* max horiz << 8 | start horiz */
lcd_cmd_data(0x44, (rect3 << 8) | rect1);
/* max vert << 8 | start vert */
lcd_cmd_data(0x45, (rect4 << 8) | rect2);
/* start vert = max vert */
#if CONFIG_LCD == LCD_IPODCOLOR
rect2 = rect4;
#endif
/* position cursor (set AD0-AD15) */
/* start vert << 8 | start horiz */
lcd_cmd_data(0x21, (rect2 << 8) | rect1);
/* start drawing */
lcd_send_lo(0x0);
lcd_send_lo(0x22);
}
addr += x * LCD_WIDTH + y;
while (height > 0) {
int c, r;
int h, pixels_to_write;
pixels_to_write = (width * height) * 2;
/* calculate how much we can do in one go */
h = height;
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) {
unsigned two_pixels;
two_pixels = addr[0] | (addr[1] << 16);
addr += 2;
while ((inl(0x70008a20) & 0x1000000) == 0);
/* output 2 pixels */
outl(two_pixels, 0x70008b00);
}
addr += LCD_WIDTH - width;
}
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);
}
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