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Commit | Line | Data |
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9fd379e9 OS |
1 | What: /sys/devices/*/<our-device>/eeprom |
2 | Date: August 2013 | |
3 | Contact: Oliver Schinagl <oliver@schinagl.nl> | |
4 | Description: 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) | |
21 | Users: any user space application which wants to read the SID on | |
22 | Allwinner's A-series of CPU's. |