23 lines
1.0 KiB
Plaintext
23 lines
1.0 KiB
Plaintext
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What: /sys/devices/*/<our-device>/eeprom
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Date: August 2013
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Contact: Oliver Schinagl <oliver@schinagl.nl>
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Description: read-only access to the SID (Security-ID) on current
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A-series SoC's from Allwinner. Currently supports A10, A10s, A13
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and A20 CPU's. The earlier A1x series of SoCs exports 16 bytes,
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whereas the newer A20 SoC exposes 512 bytes split into sections.
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Besides the 16 bytes of SID, there's also an SJTAG area,
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HDMI-HDCP key and some custom keys. Below a quick overview, for
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details see the user manual:
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0x000 128 bit root-key (sun[457]i)
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0x010 128 bit boot-key (sun7i)
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0x020 64 bit security-jtag-key (sun7i)
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0x028 16 bit key configuration (sun7i)
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0x02b 16 bit custom-vendor-key (sun7i)
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0x02c 320 bit low general key (sun7i)
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0x040 32 bit read-control access (sun7i)
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0x064 224 bit low general key (sun7i)
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0x080 2304 bit HDCP-key (sun7i)
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0x1a0 768 bit high general key (sun7i)
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Users: any user space application which wants to read the SID on
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Allwinner's A-series of CPU's.
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