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Add documentation for MSystems disk-on-chip docg3 chips sysfs entries, which enable and disable protection areas, giving or disabling access to the chip's memory. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
What: /sys/devices/platform/docg3/f[0-3]_dps[01]_is_keylocked
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Date: November 2011
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KernelVersion: 3.3
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Contact: Robert Jarzmik <robert.jarzmik@free.fr>
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Description:
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Show whether the floor (0 to 4), protection area (0 or 1) is
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keylocked. Each docg3 chip (or floor) has 2 protection areas,
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which can cover any part of it, block aligned, called DPS.
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The protection has information embedded whether it blocks reads,
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writes or both.
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The result is:
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0 -> the DPS is not keylocked
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1 -> the DPS is keylocked
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Users: None identified so far.
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What: /sys/devices/platform/docg3/f[0-3]_dps[01]_protection_key
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Date: November 2011
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KernelVersion: 3.3
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Contact: Robert Jarzmik <robert.jarzmik@free.fr>
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Description:
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Enter the protection key for the floor (0 to 4), protection area
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(0 or 1). Each docg3 chip (or floor) has 2 protection areas,
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which can cover any part of it, block aligned, called DPS.
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The protection has information embedded whether it blocks reads,
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writes or both.
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The protection key is a string of 8 bytes (value 0-255).
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Entering the correct value toggle the lock, and can be observed
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through f[0-3]_dps[01]_is_keylocked.
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Possible values are:
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- 8 bytes
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Typical values are:
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- "00000000"
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- "12345678"
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Users: None identified so far.
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