Hi,
During the disassembly of the X5 preloader I'm been going over the low-level
stuff, and I saw two interesting points:
1. LCD init in lcd-x5.c is somewhat different; see the corrected routine at
the end
(I'll make a real diff of it once my linux reestablishes awareness of grub
on its boot sector)
2. Backlight brightness is modified by setting the backlight PWM:
pcf50606_write(0x35, 0xFF-(level<<1)); // level = 0..10, cowon uses level=5
So we can support backlight brightness on X5 (prolly in H3x0 too).
Slowly but surely,
R.
-----------8<-----------------------------8<-----------------------------8<-
-----------------
/* LCD init
* These settings are taken from the original X5 firmware
*/
void lcd_init_device(void)
{
display_on=true;
/* LCD Reset */
and_l(~0x00000010, &GPIO1_OUT);
or_l(0x00000010, &GPIO1_ENABLE);
or_l(0x00000010, &GPIO1_FUNCTION);
sleep(HZ/100);
or_l(0x00000010, &GPIO1_OUT);
sleep(HZ/100);
lcd_write_reg(0, 0x0001);
sleep(HZ/50);
lcd_write_reg(0x0d, 0x0401);
lcd_write_reg(0x0e, 0x321e);
lcd_write_reg(0x01, 0x0313); // was: 0x0113
lcd_write_reg(0x02, 0x0700);
lcd_write_reg(0x05, 0x9018); // was: 0x9038
lcd_write_reg(0x06, 0x0000);
lcd_write_reg(0x0b, 0x4000);
sleep(HZ/100);
lcd_write_reg(0x21,0x0000);
lcd_write_reg(0x30,0x0003);
lcd_write_reg(0x31,0x0400);
lcd_write_reg(0x32,0x0407);
lcd_write_reg(0x33,0x0305);
lcd_write_reg(0x34,0x0003);
lcd_write_reg(0x35,0x0704);
lcd_write_reg(0x36,0x0000); // was: 0x0407
lcd_write_reg(0x37,0x0503);
lcd_write_reg(0x0f,0x0000); // was: 0x0002
lcd_write_reg(0x11,0x0000);
lcd_write_reg(0x14,0x9f00);
lcd_write_reg(0x15,0x5c00);
lcd_write_reg(0x16,0x7f00);
lcd_write_reg(0x17,0x0000); // was: 0x9f00
lcd_write_reg(0x3a,0x1409);
lcd_write_reg(0x3b,0x0602);
lcd_write_reg(0x0c,0x0001);
sleep(HZ/25);
lcd_write_reg(0x03,0x002c);
lcd_write_reg(0x04,0x8000);
sleep(HZ/25);
lcd_write_reg(0x0e,0x281e + (5<<9)); // was: 0x3318
sleep(HZ/25);
lcd_write_reg(0x0d,0x0411);
sleep(HZ/100);
lcd_write_reg(0x07,0x0006);
lcd_write_reg(0x07,0x0036);
lcd_write_reg(0x07,0x0037);
lcd_write_reg(0x07,0x0037);
return;
}
