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Minor cleaning of the iPod LCD driver

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7927 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Dave Chapman 2005-11-17 10:00:27 +00:00
parent 4d7ef948fa
commit a436a7497d
1 changed files with 19 additions and 49 deletions
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72
firmware/drivers/lcd-ipod.c
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@ -27,56 +27,26 @@
#include "system.h" #include "system.h"
/*** definitions ***/ /*** definitions ***/
#define IPOD_HW_REVISION (*((volatile unsigned long*)(0x00002084))) #define IPOD_HW_REVISION (*((volatile unsigned long*)0x00002084))
#define IPOD_PP5020_RTC (*((volatile unsigned long*)0x60005010))
/* 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_BASE 0x70008a0c
#define IPOD_LCD_BUSY_MASK 0x80000000 #define IPOD_LCD_BUSY_MASK 0x80000000
static int timer_get_current(void) /* LCD command codes for HD66789R */
{ #define LCD_CNTL_RAM_ADDR_SET 0x21
return inl(IPOD_PP5020_RTC); #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 */
/* check if number of useconds has past */ /* check if number of useconds has past */
static int timer_check(unsigned long clock_start, unsigned long usecs) static inline int timer_check(unsigned long clock_start, unsigned long usecs)
{ {
unsigned long clock; if ( (IPOD_PP5020_RTC - clock_start) >= usecs ) {
clock = inl(IPOD_PP5020_RTC);
if ( (clock - clock_start) >= usecs ) {
return 1; return 1;
} else { } else {
return 0; return 0;
@ -86,7 +56,7 @@ static int timer_check(unsigned long clock_start, unsigned long usecs)
static void lcd_wait_write(void) static void lcd_wait_write(void)
{ {
if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) != 0) { if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) != 0) {
int start = timer_get_current(); int start = IPOD_PP5020_RTC;
do { do {
if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) == 0) break; if ((inl(IPOD_LCD_BASE) & IPOD_LCD_BUSY_MASK) == 0) break;
@ -97,13 +67,13 @@ static void lcd_wait_write(void)
static void lcd_send_lo(int v) static void lcd_send_lo(int v)
{ {
lcd_wait_write(); lcd_wait_write();
outl(v | 0x80000000, 0x70008A0C); outl(v | 0x80000000, IPOD_LCD_BASE);
} }
static void lcd_send_hi(int v) static void lcd_send_hi(int v)
{ {
lcd_wait_write(); lcd_wait_write();
outl(v | 0x81000000, 0x70008A0C); outl(v | 0x81000000, IPOD_LCD_BASE);
} }
static void lcd_cmd_data(int cmd, int data) static void lcd_cmd_data(int cmd, int data)
@ -258,9 +228,9 @@ void lcd_update_rect(int x, int y, int width, int height)
} }
/* max horiz << 8 | start horiz */ /* max horiz << 8 | start horiz */
lcd_cmd_data(0x44, (rect3 << 8) | rect1); lcd_cmd_data(LCD_CNTL_HORIZ_RAM_ADDR_POS, (rect3 << 8) | rect1);
/* max vert << 8 | start vert */ /* max vert << 8 | start vert */
lcd_cmd_data(0x45, (rect4 << 8) | rect2); lcd_cmd_data(LCD_CNTL_VERT_RAM_ADDR_POS, (rect4 << 8) | rect2);
/* start vert = max vert */ /* start vert = max vert */
#if CONFIG_LCD == LCD_IPODCOLOR #if CONFIG_LCD == LCD_IPODCOLOR
@ -269,11 +239,11 @@ void lcd_update_rect(int x, int y, int width, int height)
/* position cursor (set AD0-AD15) */ /* position cursor (set AD0-AD15) */
/* start vert << 8 | start horiz */ /* start vert << 8 | start horiz */
lcd_cmd_data(0x21, (rect2 << 8) | rect1); lcd_cmd_data(LCD_CNTL_RAM_ADDR_SET, (rect2 << 8) | rect1);
/* start drawing */ /* start drawing */
lcd_send_lo(0x0); lcd_send_lo(0x0);
lcd_send_lo(0x22); lcd_send_lo(LCD_CNTL_WRITE_TO_GRAM);
} }
addr += x * LCD_WIDTH + y/2; addr += x * LCD_WIDTH + y/2;
@ -283,9 +253,9 @@ void lcd_update_rect(int x, int y, int width, int height)
int h, pixels_to_write; int h, pixels_to_write;
pixels_to_write = (width * height) * 2; pixels_to_write = (width * height) * 2;
h = height;
/* calculate how much we can do in one go */ /* calculate how much we can do in one go */
h = height;
if (pixels_to_write > 64000) { if (pixels_to_write > 64000) {
h = (64000/2) / width; h = (64000/2) / width;
pixels_to_write = (width * h) * 2; pixels_to_write = (width * h) * 2;