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


Based on kernel version 4.2. Page generated on 2015-09-09 12:07 EST.

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.
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