| 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. |
