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Phone boot with PWON: weed out short button presses Every standard end user phone has a design provision, most naturally implemented in firmware, whereby the PWON button effects a boot only if it is held down long enough - short presses of this PWON button are detected, assumed to be spurious and cause the fw to power back off instead of proceeding with boot. The present change introduces this standard function in FreeCalypso.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 24 Sep 2021 02:03:08 +0000
parents a62e5bf88434
children
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State of blobs in FreeCalypso firmware
======================================

FC Tourmaline is almost completely deblobbed.  Only the following very small
components exist in the form of blobs (prebuilt binary objects for which we
have no exact corresponding source) in the standard Tourmaline build:

* OSL and OSX glue components of GPF: 14992 bytes of code
* TMS470 compiler's RTS library (libc/libgcc equivalent): 13152 bytes of code

For OSL and OSX we do have reconstructed C code written based on disassembly of
the blobs, but I (Mother Mychaela) do not consider the current state of this C
reconstruction to be fit for production use - hence standard Tourmaline fw
builds use blob versions of these components.  However, our configuration and
build system gives you the freedom to select which version of each component
you would rather use; the selection is made with Bourne shell config variables
on the configure.sh invokation line:

OSL=0	use the blob version of OSL
OSL=1	use the reconstructed C version of OSL
OSX=0	use the blob version of OSX
OSX=1	use the reconstructed C version of OSX

The current default is OSL=0 and OSX=0.

RTS library
===========

We do have source code for some versions of the TMS470 compiler's RTS library,
but they may not be exactly corresponding to the blob version from TCS211 which
we are using.  This area is deemed to be such a low priority that no real
investigation has been done yet.