mirror of https://git.proxmox.com/git/fwupd synced 2025-08-06 16:43:15 +00:00

History

Richard Hughes dfa9e11bb2 Allow handling FORCE for devices that subclass FuDevice Pass FwupdInstallFlags down to the vfunc to allow us to check the flags when parsing the firmware and updating the device.		2019-05-05 15:29:00 -05:00
..
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	Allow handling FORCE for devices that subclass FuDevice	2019-05-05 15:29:00 -05:00
fu-altos-device.h	Use '#pragma once' to avoid a lot of boilerplate	2019-02-09 08:42:30 -06:00
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	Use '#pragma once' to avoid a lot of boilerplate	2019-02-09 08:42:30 -06:00
fu-plugin-altos.c	Allow handling FORCE for devices that subclass FuDevice	2019-05-05 15:29:00 -05:00
meson.build	Show a console warning if loading an out-of-tree plugin	2019-01-19 07:26:20 +00:00
README.md	trivial: Add the missing protocol IDs to the plugin READMEs	2019-01-29 22:28:09 +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:

Firmware Format

The daemon will decompress the cabinet archive and extract a firmware blob in ELF file format. The firmware image is inserted into the .text section.

This plugin supports the following protocol ID:

org.altusmetrum.altos

GUID Generation

These devices use the standard USB DeviceInstanceId values, e.g.

USB\VID_1D50&PID_60C6&REV_0001
USB\VID_1D50&PID_60C6
USB\VID_1D50

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.