Documentation/ABI/testing/sysfs-driver-sunxi-sid

   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.