GPIO Registers

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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 LED
7 PS Button Blue LED
8 unk
9 Camera
12 UDCD (USB Device Controller Driver) related
13 HDMI related (input)
14 unk
15 HDMI related (output)
16 GPO 0
17 GPO 1
18 GPO 2
19 GPO 3
20 GPO 4
21 GPO 5
22 GPO 6
23 GPO 7
24 UDCD (USB Device Controller Driver) related
25 unk
26 unk
27 Motion related
28 Motion related
29 unk
30 3G Modem related
31 unk

GPIO Bus 1 ports

Port Description
7 LCD related. Backlight?