blob: ffb9536f6ecc19b2ed01f38fc8d8be4bcbc0707e [file] [log] [blame]
Oliver Schinagl9fd379e2013-09-03 12:33:27 +02001What: /sys/devices/*/<our-device>/eeprom
2Date: August 2013
3Contact: Oliver Schinagl <oliver@schinagl.nl>
4Description: read-only access to the SID (Security-ID) on current
5 A-series SoC's from Allwinner. Currently supports A10, A10s, A13
6 and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
7 whereas the newer A20 SoC exposes 512 bytes split into sections.
8 Besides the 16 bytes of SID, there's also an SJTAG area,
9 HDMI-HDCP key and some custom keys. Below a quick overview, for
10 details see the user manual:
11 0x000 128 bit root-key (sun[457]i)
12 0x010 128 bit boot-key (sun7i)
13 0x020 64 bit security-jtag-key (sun7i)
14 0x028 16 bit key configuration (sun7i)
15 0x02b 16 bit custom-vendor-key (sun7i)
16 0x02c 320 bit low general key (sun7i)
17 0x040 32 bit read-control access (sun7i)
18 0x064 224 bit low general key (sun7i)
19 0x080 2304 bit HDCP-key (sun7i)
20 0x1a0 768 bit high general key (sun7i)
21Users: any user space application which wants to read the SID on
22 Allwinner's A-series of CPU's.