1. Slightly revised and regularized internal interface. Callback is used
for read and write to provide completion signal instead of having two
mechanisms.
2. Lower overhead for asynchronous or alterate completion callbacks. We
now only init what is required by the transfer. A couple unneeded
structure members were also nixed.
3. Fixes a bug that would neglect a semaphore wait if pumping the I2C
interrupts in a loop when not in thread state or interrupts are masked.
4. Corrects broken initialization order by defining KDEV_INIT, which
makes kernel_init() call kernel_device_init() to initialize additional
devices _after_ the kernel, threading and synchronization objects are
safe to use.
5. Locking set_cpu_frequency has to be done at the highest level in
system.c to ensure the boost counter and the frequency are both set in
agreement. Reconcile the locking inteface between PP and AMS (the only
two currently using locking there) to keep it clean.
Now works fine with voltages in GIT HEAD on my Fuze v2, type 0.
Previously, everything crashed and died instantly. action.c calling
set_cpu_frequency from a tick was part of it. The rest may have been
related to 3. and 4. Honestly, I'm not certain!
Testing by Mihail Zenkov indicates it solves our problems. This will
get the developer builds running again after the kernel assert code
push.
Change-Id: Ie245994fb3e318dd5ef48e383ce61fdd977224d4
Interrupts version is cause of freeze on USB extraction.
Also non-interrupts version much simpler and faster.
Change-Id: I30a2993cdcaa85abfba77ca06bfacd5b6b4353e2
Voltage is reduced when the CPU is unboosted, resulting in a large
reduction in power consumption. In analogy with the AMSv1 voltage
scaling code (currently disabled due to problems with SD cards),
I have defined a config file option to enable/disable it.
Change-Id: Ia89c31ec06dd012354b4d53435e7b5b36243b206
We need additional delay since ascodec_write_pmu() working faster in
non-interrupts version of I2C2.
Change-Id: If4af3e42b3c8e8214baa36e54353b8adb527552d
Voltage scaling is not yet enabled, but will follow once we are sure
these changes are stable. Preliminary testing suggests a large
increase in battery life, which will be further improved by voltage
scaling. Patch by Mihail Zenkov with help from myself and others on
the forums.
Change-Id: I171d20bbee19a48c13cd14efb0d023883cc8c687
operation.
The interal ROM clock seems to be needed to reboot the player, so disabling
it is too dangerous. Hopefully this will prevent problems where crashes during
the abort handler resulted in a stock player that needed the battery to drain
in order to reboot.
Change-Id: I7d1e64743dde15b64d718ad3255dada3d570736f
Player-specific code remaining: usb_drv_(init,exit)
The iPods lack a MMU, so:
- physical, virtual, and uncached addresses are identical
- since we can't access uncached memory we discard caches when receiving data
Still not quite reliable on nano2g
Change-Id: Iebb79df64818b9ae3b68eccb8be8975ebd6c21ea
Mostly for the sake of reducing latency for audio servicing where other service
routines can take a long time to complete, leading to occasional drops of a
few samples, especially in recording, where they are fairly frequent.
One mystery that remains is GPIOA IRQ being interrupted causes strange
undefined instruction exceptions, most easily produced on my Fuze V2 with a
scrollwheel. Making GPIOA the top ISR for now, thus not interruptible, cures it.
SVC mode is used during the actual calls. Hopefully the SVC stack size is
sufficient. Prologue and epilogue code only uses the IRQ stack and is large
enough.
Any routine code that should not be interrupted should disable IRQ itself from
here on in.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31642 a1c6a512-1295-4272-9138-f99709370657
move prototypes to ascodec.h
move code to ascodec*.c
YPR0: use adc-as3514.c instead of duplicating it
TODO: merge as3514.h and ascodec.h ?
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31626 a1c6a512-1295-4272-9138-f99709370657
* add support for OF version 01.01.17 in mkamsboot
* introduce and implement oled_brightness function
* configure voltage CVDD2 to 2.8V (like the OF does)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30831 a1c6a512-1295-4272-9138-f99709370657
Differences in PMU settings:
- explicitly disable the PLL inside the PMU (we don't use it)
- don't increase the PVDD1/AVDD17 voltages because the impact on runtime is still unclear
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30571 a1c6a512-1295-4272-9138-f99709370657
FCLK is unused because we use fastbus clocking: CPU clock = PCLK
Base PCLK off PLLA and use the lowest frqeuency for FCLK (24MHz source,
maximum divider)
Save a bit of power, adjust Clipv1/e200v2/Fuzev1 current usage accordingly
Note: the power saving (in mA) is a bit less on e200v2/Fuzev1 than on Clipv1
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28000 a1c6a512-1295-4272-9138-f99709370657
Without this change the backlight would be enabled but the screen would
show the last content displayed before the screen went off
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27957 a1c6a512-1295-4272-9138-f99709370657
- Revert BUTTON_HOME
- Modifications to SD driver (µSD not working yet)
TODO: µSD and FM radio
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27492 a1c6a512-1295-4272-9138-f99709370657
it achieves all the requirements, work fine on c200v2, and is much simpler
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26933 a1c6a512-1295-4272-9138-f99709370657
Reserve 1MB of DRAM for loading rockbox and use the rest as BSS
Write sdram setup in assembler and move it to a separate file, together
with MMU init code
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26926 a1c6a512-1295-4272-9138-f99709370657
Declare VIC registers holding function pointers as volatile pointers to
function pointers and access them directly without casting
UIRQ() is an IRQ handler too, even if it doesn't return
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26313 a1c6a512-1295-4272-9138-f99709370657
We assume only one bit is set and use clz to find the most significant
set bit, if there's more than one bit set we'll see it in the panic msg
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26285 a1c6a512-1295-4272-9138-f99709370657
it's only needed if we hotswap the µSD or if we build the fuzev2
scrollwheel code without irq (which we don't do anyway)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26165 a1c6a512-1295-4272-9138-f99709370657
The list is ordered by priority, put the DMA and SD interrupts at
the top
This seems to fix the random freezes on heavy storage operation like
building database or pictureflow cache
The recently added audio interrupt had a priority higher than SD slot on
as3525v1, give it a lower priority
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26160 a1c6a512-1295-4272-9138-f99709370657
