GPIO Registers

MMIO Interfaces

Name	Physical address
SceGpio0Reg	0xE20A0000
SceGpio1Reg	0xE0100000

Registers

Offset	Size	Description
0x00	4	Port mode (1=out, 0=in) (1 bit each port)
0x04	4	Port read (1=low, 0=high?) (1 bit each port)
0x08	4	Port set (1 bit each port)
0x0C	4	Port clear (1 bit each port)
0x14	4	Interrupt mode (2 bits) for interrupts 0-15
0x18	4	Interrupt mode (2 bits) for interrupts 16-31
0x34	4	Port read latched? (1=low, 0=high?) (1 bit each port)

It looks like +0x10,+0x14,+0x18,+0x1C,+0x20 are related to interrupt enable, and +0x38,+0x3C,+0x40,+0x44,+0x48 to interrupt ack.

GPIO Bus 0 ports

Port	Description
0	OLED/LCD
1	unk
2	unk
3	Syscon related (output)
4	Syscon related (input)
5	UDCD (USB Device Controller Driver) related
6	Game Card reader LED
7	PS Button Blue LED (only blue ?? no red?)
8	unk
9	Camera
10	unk. Used in 0.996 SceEnumWakeUp.
11	unk. Used in 0.996 SceEnumWakeUp.
12	UDCD (USB Device Controller Driver) related
13	HDMI related (input)
14	unk
15	HDMI related (output)
16	GPO 0 (Developpement Tool LED 0)
17	GPO 1 (Developpement Tool LED 1)
18	GPO 2 (Developpement Tool LED 2)
19	GPO 3 (Developpement Tool LED 3)
20	GPO 4 (Developpement Tool LED 4)
21	GPO 5 (Developpement Tool LED 5)
22	GPO 6 (Developpement Tool LED 6)
23	GPO 7 (Developpement Tool LED 7)
24	UDCD (USB Device Controller Driver) related
25	unk
26	unk
27	Motion related
28	Motion related
29	SDIF related
30	3G Modem related
31	unk

GPIO Bus 1 ports

Port	Description
7	LCD related. Backlight?