rockbox/firmware/target/arm/tcc780x
Michael Sevakis 1654efc313 Unify storage threads into one
* Editing a bunch of drivers' thread routines in order to
implement a new feature is tedious.

* No matter the number of storage drivers, they share one thread.
No extra threads needed for CONFIG_STORAGE_MULTI.

* Each has an event callback called by the storage thread.

* A default callback is provided to fake sleeping in order to
trigger idle callbacks. It could also do other default processing.
Changes to it will be part of driver code without editing each
one.

* Drivers may sleep and wake as they please as long as they give
a low pulse on their storage bit to ask to go into sleep mode.
Idle callback is called on its behalf and driver immediately put
into sleep mode.

* Drivers may indicate they are to continue receiving events in
USB mode, otherwise they receve nothing until disconnect (they
do receive SYS_USB_DISCONNECTED no matter what).

* Rework a few things to keep the callback implementation sane
and maintainable. ata.c was dreadful with all those bools; make
it a state machine and easier to follow. Remove last_user_activity;
it has no purpose that isn't served by keeping the disk active
through last_disk_activity instead.

* Even-out stack sizes partly because of a lack of a decent place
to define them by driver or SoC or whatever; it doesn't seem too
critical to do that anyway. Many are simply too large while at
least one isn't really adequate. They may be individually
overridden if necessary (figure out where). The thread uses the
greatest size demanded. Newer file code is much more frugal with
stack space. I barely see use crack 50% after idle callbacks
(usually mid-40s). Card insert/eject doesn't demand much.

* No forcing of idle callbacks. If it isn't necessary for one or
more non-disk storage types, it really isn't any more necessary for
disk storage. Besides, it makes the whole thing easier to implement.

Change-Id: Id30c284d82a8af66e47f2cfe104c52cbd8aa7215
2017-10-26 14:35:41 -04:00
..
cowond2 Fix red/yellow 2015-01-12 12:02:24 +01:00
adc-tcc780x.c Updated our source code header to explicitly mention that we are GPL v2 or 2008-06-28 18:10:04 +00:00
app.lds Add KEEP() around vectors in linker scripts. 2011-12-18 06:43:08 +00:00
ata-nand-target.h Make the TCC780x NAND driver also build for 77x targets. This is work-in-progress stuff and does not yet work fully on 77x, but it's a step in the right direction. Also replace some magic numbers with #defines. 2008-07-12 23:01:49 +00:00
boot.lds Do some things to make -ffunction-sections work better. 2011-12-17 01:43:32 +00:00
crt0.S arm: factor all exception handlers out of the crt0.S files 2012-04-06 13:46:32 +02:00
debug-tcc780x.c Fix various reds. Some includes needed fixup. 2014-03-03 19:10:48 +01:00
kernel-tcc780x.c TCC78x: Enable interrupts/threading in the bootloader (required now that the storage driver yields). 2009-06-24 07:37:11 +00:00
sd-tcc780x.c Unify storage threads into one 2017-10-26 14:35:41 -04:00
system-target.h Fix various reds. Some includes needed fixup. 2014-03-03 19:10:48 +01:00
system-tcc780x.c D2: Fix the POWER button check after an exception/panic. Make this power the player off, since we don't know how to force a reboot yet. 2009-07-25 18:44:57 +00:00
timer-tcc780x.c Remove the TIMER_* macros and declare target-specific functions in timer.h 2009-06-29 14:29:57 +00:00