23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
What: /sys/devices/*/<our-device>/eeprom
|
|
Date: August 2013
|
|
Contact: Oliver Schinagl <oliver@schinagl.nl>
|
|
Description: read-only access to the SID (Security-ID) on current
|
|
A-series SoC's from Allwinner. Currently supports A10, A10s, A13
|
|
and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
|
|
whereas the newer A20 SoC exposes 512 bytes split into sections.
|
|
Besides the 16 bytes of SID, there's also an SJTAG area,
|
|
HDMI-HDCP key and some custom keys. Below a quick overview, for
|
|
details see the user manual:
|
|
0x000 128 bit root-key (sun[457]i)
|
|
0x010 128 bit boot-key (sun7i)
|
|
0x020 64 bit security-jtag-key (sun7i)
|
|
0x028 16 bit key configuration (sun7i)
|
|
0x02b 16 bit custom-vendor-key (sun7i)
|
|
0x02c 320 bit low general key (sun7i)
|
|
0x040 32 bit read-control access (sun7i)
|
|
0x064 224 bit low general key (sun7i)
|
|
0x080 2304 bit HDCP-key (sun7i)
|
|
0x1a0 768 bit high general key (sun7i)
|
|
Users: any user space application which wants to read the SID on
|
|
Allwinner's A-series of CPU's.
|