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Grayscale iPods: Bit-flipped the 2bit LCD driver to use the same format as apple. No more mirrored display when loading retailos, after a bootloader update.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9478 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jens Arnold 2006-04-04 00:55:16 +00:00
parent ec5f783988
commit fcab617331
3 changed files with 39 additions and 43 deletions
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47
firmware/drivers/lcd-ipod.c
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@ -71,13 +71,13 @@ static inline bool timer_check(int clock_start, int usecs)
#define R_RAM_DATA 0x12
/* needed for flip */
static int addr_offset = 0;
static int addr_offset;
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
static int pix_offset = 0;
static int pix_offset;
#endif
/* wait for LCD with timeout */
static void lcd_wait_write(void)
static inline void lcd_wait_write(void)
{
int start = USEC_TIMER;
@ -127,7 +127,7 @@ void lcd_init_device(void)
{
lcd_cmd_and_data(R_DISPLAY_CONTROL, 0x0015);
lcd_set_flip(false);
lcd_cmd_and_data(R_ENTRY_MODE, 0x0010);
lcd_cmd_and_data(R_ENTRY_MODE, 0x0000);
#ifdef APPLE_IPOD4G
outl(inl(0x6000d004) | 0x4, 0x6000d004); /* B02 enable */
@ -180,29 +180,29 @@ void lcd_set_flip(bool yesno)
{
#if defined(IPOD_MINI) || defined(IPOD_MINI2G)
if (yesno) {
/* 160x112, inverse SEG & COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x030d);
/* 168x112, inverse COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x020d);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8316); /* 22..131 */
addr_offset = (22 << 5) | 3;
addr_offset = (22 << 5) | (20 - 3);
pix_offset = 6;
} else {
/* 160x112 */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x000d);
/* 168x112, inverse SEG order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x010d);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x6d00); /* 0..109 */
addr_offset = 0;
addr_offset = 20;
pix_offset = 0;
}
#else
if (yesno) {
/* 160x128, inverse COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x020f);
/* 168x128, inverse SEG & COM order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x030f);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x8304); /* 0..127 */
addr_offset = (4 << 5) | 1;
addr_offset = (4 << 5) | (20 - 1);
} else {
/* 160x128, inverse SEG order */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x010f);
/* 168x128 */
lcd_cmd_and_data(R_DRV_OUTPUT_CONTROL, 0x000f);
lcd_cmd_and_data(R_1ST_SCR_DRV_POS, 0x7f00); /* 4..131 */
addr_offset = 0;
addr_offset = 20;
}
#endif
}
@ -230,7 +230,7 @@ void lcd_update_rect(int x, int y, int width, int height)
for (; y <= ymax; y++) {
unsigned char *data, *data_end;
int ram_addr = (x | (y << 5)) + addr_offset;
int ram_addr = (y << 5) + addr_offset - x;
lcd_cmd_and_data(R_RAM_ADDR_SET, ram_addr);
lcd_prepare_cmd(R_RAM_DATA);
@ -241,19 +241,18 @@ void lcd_update_rect(int x, int y, int width, int height)
if (pix_offset == 6) {
data -= 2;
data_end -= 1;
unsigned cur_word = *data++ >> 4;
unsigned cur_word = *data++;
do {
cur_word |= *data++ << 4;
cur_word |= *data++ << 12;
lcd_send_data(cur_word & 0xffff);
cur_word >>= 16;
cur_word = (cur_word << 8) | *data++;
cur_word = (cur_word << 8) | *data++;
lcd_send_data((cur_word >> 4) & 0xffff);
} while (data < data_end);
} else
#endif
{
do {
unsigned lowbyte = *data++;
lcd_send_data(lowbyte | (*data++ << 8));
unsigned highbyte = *data++;
lcd_send_data((highbyte << 8) | *data++);
} while (data < data_end);
}
}