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fwupd/plugins/altos
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Richard Hughes 838d91e4ed Add support for counterpart GUIDs 
These are GUIDs that are related to the main device, but should not be used for
quirk matching. For instance, we might want to list the GUIDs for a bootloader
mode, but we don't want to import all the quirks for the bootloader when in the
runtime mode.
2018-08-30 16:55:41 +01:00
..
data Add support for flashing the ChaosKey 2017-01-09 12:21:35 +00:00
altos.quirk Change the quirk file structure to be more efficient 2018-06-28 13:32:30 +01:00
fu-altos-device.c trivial: Move gudev to the core plugin deps 2018-08-26 19:38:58 +01:00
fu-altos-device.h altos: Use the new FuDevice:probe vfunc 2018-08-22 13:32:29 +01:00
fu-altos-firmware.c Remove the unused Emacs indenting headers from all source files 2018-08-09 12:48:04 +01:00
fu-altos-firmware.h Remove the unused Emacs indenting headers from all source files 2018-08-09 12:48:04 +01:00
fu-plugin-altos.c Add support for counterpart GUIDs 2018-08-30 16:55:41 +01:00
meson.build trivial: Move gudev to the core plugin deps 2018-08-26 19:38:58 +01:00
README.md Add support for flashing the ChaosKey 2017-01-09 12:21:35 +00:00

README.md

Altos Support

Introduction

Altos is a 8051 operating system for Altus-Metrum projects. The ChaosKey is a hardware random number generator that attaches via USB.

When the ChaosKey when inserted it appears as a device handled by the kernel with VID 0x1d50 and PID 0x60c6. If pins 1 and 5 are shorted as the device is connected then the bootloader is run, which presents VID 0xfffe and PID 0x000a.

The bootloader communication is not handled in the kernel, and a tty device is created so userspace can communicate with the hardware. Commands the bootloader accept are as follows:

List Information

Command: l\n Several lines of text about the device are transferred to the host, e.g.

altos-loader
manufacturer     altusmetrum.org
product          AltosFlash
flash-range      08001000 08008000
software-version 1.6.8

There doesn't appear to be any kind of end-of-message signal.

Read Flash

Command: R $addr\n where $addr is a memory address 0x8001000->0x8008000. 256 bytes of raw data are then transferred to the host.

Write Flash

Command: W $addr\n where $addr is a memory address 0x8001000->0x8008000. 256 bytes of raw data are then transferred to the device.

Application Mode

Command: v\n The device will reboot into application mode. This is typically performed after flashing firmware completes successfully.