Commit Graph

76 Commits

Author SHA1 Message Date
Paul Walmsley 275f675c24 OMAP3: PM: PM_MPUGRPSEL writes should use GRPSEL macros, not EN macros
Writes to the PM_*GRPSEL registers should use _GRPSEL_ macros, not _EN_ macros,
to match the TRM and guard against inadvertent error.  This patch should
not cause any functional change.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Jouni Högander <jouni.hogander@nokia.com>
2010-05-20 12:31:05 -06:00
Paul Walmsley 2fd0f75cb3 OMAP2+ PRCM: convert remaining PRCM macros to the _SHIFT/_MASK suffixes
Fix all of the remaining PRCM register shift/bitmask macros that did not
use the _SHIFT/_MASK suffixes to use them.  This makes the use of these
macros consistent.  It is intended to reduce error, as code can be inspected
visually by reviewers to ensure that bitshifts and bitmasks are used in
the appropriate places.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-20 12:31:05 -06:00
Paul Walmsley 2bc4ef71c5 OMAP3 PRCM: convert OMAP3 PRCM macros to the _SHIFT/_MASK suffixes
Fix all of the remaining OMAP3 PRCM register shift/bitmask macros that
did not use the _SHIFT/_MASK suffixes to use them.  This makes the use
of these macros consistent.  It is intended to reduce error, as code
can be inspected visually by reviewers to ensure that bitshifts and
bitmasks are used in the appropriate places.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-20 12:31:05 -06:00
Tony Lindgren 5a5f561e40 Merge branch 'pm-next' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus 2010-05-20 11:11:44 -07:00
Kevin Hilman 43ffcd9a04 OMAP2/3: GPIO: generalize prepare for idle
Currently, the GPIO 'prepare' hook is only called when going to
off-mode, while the function is called 'prepare_for_retention.'  This
patch renames the function to 'prepare_for_idle' and calls it for any
powersate != PWRDM_POWER_ON passing in the powerstate.

The hook itself is then responsible for doing various preparation
based on the powerstate.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:39:16 -07:00
Tero Kristo a118b5f339 OMAP3: GPIO fixes for off-mode
Off mode is now using the omap2 retention fix code for scanning GPIOs
during off-mode transitions. All the *non_wakeup_gpios variables
are now used for off-mode transition tracking on OMAP3. This patch fixes
cases where GPIO state changes are missed during off-mode.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:39:16 -07:00
Mike Chan 331b9e3d61 OMAP3: PM: Remove PER wakeup dependency on CORE.
We can remove this wakeup dependency since now, when
GPIO2-6 are enabled for IO-pad wakeup, PER domain is gauranteed
to be awake or be woken up to service.

The previous dependency did not handle all corner cases. Since there
was no sleep dependency between CORE and PER domains, if PER enters
RET and CORE is ON, PER will not be active for GPIO handling.

Signed-off-by: Mike Chan <mike@android.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:39:01 -07:00
Mike Chan 40742fa82e OMAP3: PM: Enable IO / IO-CHAIN wakeups for PER
IO events can also come from GPIO modules, which reside in the PER domain.
It is possible for the PER to enter RET while CORE is still in ON.
If GPIO 2-6 are enabled for IO-pad wakeups, the PER domain will not
wakeup in this case, unless we enable it.

Signed-off-by: Mike Chan <mike@android.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:39:00 -07:00
Ari Kauppi 8e2efde9f1 OMAP3: PM: Add milliseconds interface to suspend wakeup timer
Millisecond resolution is possible and there are use cases for it
(automatic testing).

Seconds-based interface is preserved for compatibility.

Signed-off-by: Ari Kauppi <Ext-Ari.Kauppi@nokia.com>
Reviewed-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:39:00 -07:00
Kevin Hilman d6290a3ead OMAP3: PRCM interrupt: only check and clear enabled PRCM IRQs
While handling PRCM IRQs, mask out interrupts that are not enabled in
PRM_IRQENABLE_MPU.  If these are not masked out, non-enabled
interrupts are caught, a WARN() is printed due to no 'handler' and the
events are cleared.  In addition to being noisy, this can also
interfere with independent polling of this register by SR/VP code.

This was noticed using SmartReflex transitions which cause the VPx_*
interrupts to be handled since they are set in PRM_IRQSTATUS_MPU even
but not enabled in PRM_IRQENABLE_MPU.

Acked-by: Mike Turquette <mturquette@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-05-12 09:38:59 -07:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Tony Lindgren b610ec5023 Merge branch 'for_2.6.34_b' of git://git.pwsan.com/linux-2.6 into omap-for-linus 2010-02-24 20:53:03 -08:00
Kevin Hilman dfa6d6f892 OMAP3: clock: use std _MASK suffix for CM_FCLKEN_IVA2 defines
Add _MASK suffix to CM_FCLKEN_IVA2 bitfieds to conform with the rest
of the usage in cm-regbits-34xx.h of using _SHIFT and _MASK suffixes.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
2010-02-24 12:05:48 -07:00
Sanjeev Premi 6af83b3861 OMAP3: cpuidle: Update statistics for correct state
When 'enable_off_mode' is 0, the target power state for MPU
and CORE was locally changed to PWRDM_POWER_RET but, the
statistics are updated for idle state originally selected
by the governor.

This patch 'invalidates' the idle states that lead either of
MPU or Core to PWRDM_POWER_OFF state when 'enable_off_mode'
is '0'. The states are valid once 'enable_off_mode' is set
to '1'.

Added function next_valid_state() to check if current state
is valid; else get the next valid state. It is called from
omap3_enter_idle_bm().

Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-02-23 11:05:00 -08:00
Paul Walmsley 369d561445 OMAP clockdomains: add usecounting for wakeup and sleep dependencies
Add usecounting for wakeup and sleep dependencies.  In the current
situation, if several functions add dependencies on the same
clockdomains, when the first dependency removal function is called,
the dependency will be incorrectly removed from the hardware.

Add clkdm_clear_all_wkdeps() and clkdm_clear_all_sleepdeps(), which
provide a fast and usecounting-consistent way to clear all hardware
clockdomain dependencies, since accesses to these registers can be
quite slow.  pm{2,3}4xx.c has been updated to use these new functions.
The original version of this patch did not touch these files, which
previously wrote directly to the wkdep registers, and thus confused
the usecounting code.  This problem was found by Kevin Hilman
<khilman@deeprootsystems.com>.

N.B.: This patch introduces one significant functional difference over
the previous pm34xx.c code: sleepdeps are now cleared during
clockdomain initialization, whereas previously they were left
untouched.  This has been tested by Kevin and confirmed to work.

The original version of this patch also did not take into
consideration that some clockdomains do not have sleep or wakeup
dependency sources, which caused NULL pointer dereferences.  This
problem was debugged and fixed by Kevin Hilman
<khilman@deeprootsystems.com>.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Jouni Högander <jouni.hogander@nokia.com>
2010-01-26 20:13:01 -07:00
Paul Walmsley 55ed96945b OMAP2/3 clkdm/pwrdm: move wkdep/sleepdep handling from pwrdm to clkdm
Move clockdomain wakeup dependency and sleep dependency data
structures from the powerdomain layer to the clockdomain layer, where
they belong.  These dependencies were originally placed in the
powerdomain layer due to unclear documentation; however, it is clear
now that these dependencies are between clockdomains.  For OMAP2/3,
this is not such a big problem, but for OMAP4 this needs to be fixed.

Thanks to Benoît Cousson <b-cousson@ti.com> for his advice on this
patch.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
2010-01-26 20:12:59 -07:00
Abhijit Pagare 3790300903 ARM: OMAP4: PM: OMAP4 Power Domain Porting Related Clean-up.
Module offsets were same for OMAP2 and OMAP3 while they differ for OMAP4.
Hence we need different macros for identifying platform specific offsets.

Signed-off-by: Abhijit Pagare <abhijitpagare@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Rajendra Nayak <rnayak@ti.com>
2010-01-26 20:12:51 -07:00
Subramani Venkatesh b92c5721d2 OMAP3: PM: DSS PM_WKEN to refill DMA
Currently, DSS does not wakeup when there is a DMA request.  DSS wake
up event must be enabled so that the DMA request to refill the FIFO
will wake up the CORE domain.

Signed-off-by: Subramani Venkatesh <subramani.venkatesh@windriver.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:16:09 -08:00
Tero Kristo dccaad8950 OMAP3: PM: Force write last pad config register into save area
Due to OMAP3 erratas 1.157, 1.185 the save of the last pad register
(ETK_D14 and ETK_D15) can fail sometimes when there is simultaneous
OCP access to the SCM register area. Fixed by writing the last
register to the save area.

Also, optimized the delay loop for the HW save to include an udelay(1),
which limits the number of unnecessary HW accesses to SCM register area
during the save.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Acked-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:16:07 -08:00
Peter Ujfalusi e3d9329640 OMAP3: PM: Enable wake-up from McBSP2, 3 and 4 modules
Wake-up from McBSP ports are needed, especially when the THRESHOLD
dma mode is in use for audio playback.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:16:06 -08:00
Sanjeev Premi a174e609b5 OMAP3: PM: Remove duplicate code blocks
This patch removes code blocks that are repeated
in function prcm_setup_regs().

Signed-off-by: Sanjeev Premi <premi@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:16:01 -08:00
Tero Kristo f18cc2ff5e OMAP3: PM: Disable interrupt controller AUTOIDLE before WFI
OMAP interrupt controller goes to unknown state when there is right
combination of l3,l4 sleep/wake-up transitions, l4 autoidle in
interrupt controller and some interrupt. When this happens, interrupts
are not delivered to ARM anymore and ARM will remain in WFI (wait for
interrupt) until interrupt controller is forced to wake-up
(i.e. lauterbach).

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:16:00 -08:00
Tero Kristo b296c8118b OMAP3: PM: Enable system control module autoidle
Enable the auto-idle feature of the SCM block to save some additional
power.

Signed-off-by: Mika Westerberg <ext-mika.1.westerberg@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:15:59 -08:00
Tero Kristo 2bbe3af3f1 OMAP3: PM: Ack pending interrupts before entering suspend
Suspending drivers may still generate interrupts just before their suspend is
completed. Any pending interrupts here will prevent sleep.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-01-20 18:15:58 -08:00
Roel Kluin 1b6e821f23 omap3: add missing parentheses
`!' has a higher precedence than `&' so parentheses are required.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-01-08 10:29:07 -08:00
Tero Kristo cf22854cee OMAP3: PM: Added resched check into idle calls
Fixes a bug where scheduling is delayed until next wakeup due to race
condition (e.g. interrupt requests scheduling just before omap_sram_idle
is entered.)

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:50 -08:00
Peter 'p2' De Schrijver da869621c3 OMAP3: PM: idle: Remove fclk check for idle loop
This patch removes the check to see if some functional clocks are
still enabled before entering sleep.  This is no longer needed when
using safe state (C1) that keeps CORE active.

Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:50 -08:00
Jouni Hogander 7139178e9b OMAP3: PM: Use pwrdm_set_next_pwrst instead of set_pwrdm_state in idle loop
It is more efficient to use pwrdm_set_next_pwrst for mpu, core and neon
instead of set_pwrdm_state in idle loop. It is anyway known that those are
active in idle loop. So no need to use set_pwrdm_state.

Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:50 -08:00
Kalle Jokiniemi 0343371e22 OMAP3: PM: CPUidle: fix init sequencing
Previously omap3_idle_init() was called in device_init, while
omap_pm_init() is called at late_initcall. This causes the cpu idle
driver to call omap_sram_idle before it is properly initialized. This
patch fixes the issue by moving omap3_idle_init into omap3_pm_init.

Signed-off-by: Kalle Jokiniemi <ext-kalle.jokiniemi@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:49 -08:00
Rajendra Nayak 20b0166988 OMAP3: PM: CPUidle: support retention and off-mode C-states
This patch adds support and enables state C4(MPU RET + CORE RET)
and MPU OFF states (C3 and C5.)

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:48 -08:00
Rajendra Nayak 99e6a4d22f OMAP3: PM: CPUidle: base driver and support for C1-C2
Basic CPUidle driver for OMAP3 with deepest sleep state supported
being MPU CSWR.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:48 -08:00
Rajendra Nayak f265dc4c5d OMAP3: PM: Program SDRC to send self refresh on timeout of AUTO_CNT
Due to an OMAP3 errata (1.142), on HS/EMU devices SDRC should be
programed to issue automatic self refresh on timeout
of AUTO_CNT = 1 prior to any transition to OFF mode.
This is needed only on sil rev's ES3.0 and above.

This patch enables the above needed WA in the SDRC power register
value stored in scratchpad, so that ROM code restores this value
in SDRC POWER on the wakeup path.
The original SDRC POWER register value is stored and restored back
in omap_sram_idle() function.

This fixes some random crashes observed while stressing suspend
on HS/EMU devices.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Kalle Jokiniemi 3a7ec26bb4 OMAP3: PM: Enable IO-CHAIN wakeup
OMAP 3430 ES3.1 chips have a separate bit for IO daisy-chain
wake up enabling. It needs to be enabled when entering
retention or off state, otherwise waking up might not work
in all situations.

Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Tero Kristo c16c3f672d OMAP3: PM: MPU and CORE should stay awake if there is CAM domain ACTIVE
MPU and CORE should stay awake if there is CAM domain ACTIVE. This is
because that module doesn't have wake-up capability.

This should replace the patch that is currently in the PM branch.

Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Tero Kristo ecf157d0b3 OMAP3: PM: Prevent PER from going OFF when CORE is going INA
OMAP3 can't generate wakeups in this state, thus it is not permitted.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Kevin Hilman 658ce97ef5 OMAP3: PM: decouple PER and CORE context save and restore
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Kevin Hilman d7814e4df6 PM debug: allow configurable wakeup from suspend on OMAP GPtimer
Using debugfs, export a configurable wakeup timer to be used to
wakeup system from suspend.

If a non-zero value is written to
/debug/pm_debug/wakeup_timer_seconds, A timer wakeup event will wake
the system and resume after the configured number of seconds.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:28 -08:00
Kevin Hilman c40552bc82 OMAP3: PM debug: allow runtime toggle of PM features
Allow enable/disable of low-power states during idle.  To
enable low-power idle:

   echo 1 > /debug/pm_debug/sleep_while_idle

 to disable:

   echo 0 > /debug/pm_debug/sleep_while_idle

Also allow enable/disable of OFF-mode.  To enable:

   echo 1 > /debug/pm_debug/enable_off_mode

 to disable:

   echo 0 > /debug/pm_debug/enable_off_mode

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:27 -08:00
Kalle Jokiniemi 8a917d2fc8 ARM: OMAP: SMS: save/restore of SMS_SYSCONFIG for off-mode
The SMS_SYSCONFIG register gets reset in off mode, added a
save/restore mechanism for that.

Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:26 -08:00
Kalle Jokiniemi ba50ea7eb9 OMAP3: PM: Fix secure SRAM context save/restore
The secure sram context save uses dma channels 0 and 1.
In order to avoid collision between kernel DMA transfers and
ROM code dma transfers, we need to reserve DMA channels 0
1 on high security devices.

A bug in ROM code leaves dma irq status bits uncleared.
Hence those irq status bits need to be cleared when restoring
DMA context after off mode.

There was also a faulty parameter given to PPA in the secure
ram context save assembly code, which caused interrupts to
be enabled during secure ram context save. This caused the
save to fail sometimes, which resulted the saved context
to be corrupted, but also left DMA channels in secure mode.
The secure mode DMA channels caused "DMA secure error with
device 0" errors to be displayed.

Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:26 -08:00
Tero Kristo 13a6fe0f6a OMAP3: PM: Enable SDRAM auto-refresh during sleep
Fix for ES3.0 bug: SDRC not sending auto-refresh when OMAP wakes-up
from OFF mode (warning for HS devices.)

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Tero Kristo 9d97140bd0 OMAP3: PM: save secure RAM only during init
The function omap3_save_secure_ram() is now called only once during
the initialization of the device and consequent sleep cycles will
re-use the same saved contents for secure RAM. Users who need secure
services should do secure RAM saving before entering off-mode, if a
secure service has been accessed after last save.

There are both latency and reliability issues with saving secure RAM
context in the idle path. The context save uses a hardware resource
which takes an order of hundreds of milliseconds to initialize after a
wake up from off-mode, and also there is no way of checking whether it
is ready from kernel side or not. It just crashes if you use it too
quickly

Additional fix to ensure scratchpad save is done after secure
RAM by Roger Quadros.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Roger Quadros <ext-roger.quadros@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Tero Kristo 27d59a4a2d OMAP3 PM: off-mode support for HS/EMU devices
For HS/EMU devices, some additional resources need to be
saved/restored for off-mode support.  Namely, saving the secure RAM
and a pointer to it in the scratchpad.

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Tero Kristo f2d1185824 OMAP: PM: DMA context save/restore for off-mode support
For HS/EMU devices, these additional features are also used:

- DMA interrupt disable routine added
- Added DMA controller reset to DMA context restore

Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Rajendra Nayak 2f5939c3ec OMAP3: PM: CORE domain off-mode support
Add context save and restore for CORE powerdomain resources in order
to support off-mode.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Rajendra Nayak 61255ab9e8 OMAP3: PM: MPU off-mode support
Adds a 'save_state' option when calling into SRAM idle function
and adds some minor cleanups of SRAM asm code.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:25 -08:00
Rajendra Nayak 57f277b012 OMAP3: PM: Restore MMU table entry
During the MMU restoration on the restore path from MPU OFF, the page
table entry for the page consisting of the code being executed is
modified to make MMU return VA=PA.

The MMU is then enabled and the original entry is being stored in
scratchpad.  This patch reads the original values stored in
scratchpad, and restores them back.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:24 -08:00
Rajendra Nayak fa3c2a4fc9 OMAP3: PM: handle PER/NEON/CORE in idle
Expand the powerdomains handled in the idle path to include PER, NEON
and CORE.  This includes properly clearing the previous powerstates,
linking NEON state to MPU state and calling the UART prepare functions
for only the appropraite powerdomain transitions (CORE for UART1,2,
PER for UART3.)

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:24 -08:00
Rajendra Nayak 3231fc889c OMAP3: PM: restore SRAM functions after off-mode.
Generalize the copy of SRAM functions into omap_push_sram_idle()
so it can be used on init but also after off-mode transitions.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2009-11-11 14:42:24 -08:00
Tony Lindgren 774facda20 Merge branch '7xx-iosplit-plat' with omap-fixes 2009-11-10 18:10:34 -08:00