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>
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>
This patch improves the wakeup SRAM code polling the SDRC to become ready
instead of just waiting for a fixed amount of time.
Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The hardware SAVEANDRESTORE mechanism seems to leave
USB HOST power domain permanently into active state
after one transition from off to active state.
Disabling for now.
Signed-off-by: Kalle Jokiniemi <ext-kalle.jokiniemi@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The reboot mode can be communicated to a bootloader (or the
kernel itself) with a scratchpad register. This functionality
is especially useful, if userspace is allowed to change
the reboot mode.
Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
The CM_CLKEN_PLL register saved in scratchpad memory
was wrongly using offset of 0x0004 instead of 0x0000.
The effect of this was that boot ROM code would
restore the wrong value when waking up from off mode.
This wrong value, however, will be overwritten by
prcm context restore. Still, a short period of wrong
clock settings in CM_CLKEN_PLL remained between ROM
code and prcm context restore. This is fixed by the
patch.
Problem reported by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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>
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>
CM_CLKSEL1_PLL_IVA2 is not saved/restored currently. This patch is
adding save and restore for it.
Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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>
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>
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>
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>
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>
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>
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>
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>
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>
Add context save and restore for the System Control Module to suport
off-mode.
ETK and debobs definitions added by Peter De Schrijver.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Peter 'p2' De Schrijver <peter.de-schrijver@nokia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This patch populates the scratchpad contents as expected by the
bootROM code.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Add context save and restore for PRCM module to support off-mode.
Additional registers (CM_CLKSEL4, CM_CLKEN, CM_CLKEN2) added by Tero
Kristo.
Missing CM_CLKEN_PLL_IVA2 register added by Kalle Jokiniemi.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Tero Kristo <tero.kristo@nokia.com>
Signed-off-by: Kalle Jokiniemi <kalle.jokiniemi@digia.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Add context save and restore for the INTC module to support off-mode.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This patch adds the context save and restore functions for GPMC to
enable off-mode.
Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Fix a type in rt2800_config_channel_rt3x. The second write to RF
register 2 should be to RF register 3. This is confirmed by the
legacy Ralink code.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
The max MCS index is 76, fix the higher check to allow through
frames received at MCS 76. This is a non-issue for current drivers
as MCS 76 is only possible with a device supporting 4 spatial
streams.
While at it change the WARN_ON() on invalid HT rates to a WARN()
to provide more useful information. This will help debug issues
when the driver is passing up a bogus HT rate value.
The rate must map to a valid MCS index which can be any of the
values in the set [0 - 76] (inclusive).
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
For my Linksys WUSB11 at76c503-i3861 device, scanning fails without
probe_delay, min_channel_time, and max_channel_time specified for the
scan request. These values were found by checking scan requests from
the at76_usb driver.
Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Acked-by: Kalle Valo <kalle.valo@iki.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
As mentioned on the linux-wireless mailing list, the current copyright
statements in the rt2x00 are meaningless, as the rt2x00 project is
not even a formal legal entity. Therefore it is better to replace
the existing copyright statements with copyright statements for the
people that actually wrote the code.
Note: Updated to the best of my knowledge with respect to who
contributed considerable amounts of code.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
CC: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Link tuning code from the legacy rt2570 driver turned out to be
harmful and got disabled by the commit d06193f ("rt2x00: Disable
link tuning in rt2500usb") in August 2008.
There is no reason to keep this dead code any longer so remove it
(it can still be retrieved from the git history if necessary).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
eFuse EEPROM is used also by USB chips (i.e. RT3070)
so move the needed code from rt2800pci to rt2800lib.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Rename RXD_W0_* defines to RXINFO_W0_* ones to match naming
used for TX descriptor and by the vendor driver.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Enclose interface specific code in rt2800[pci,usb]_probe_hw_mode()
with rt2x00_intf_is_[pci,usb]() checks.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Move hw_mode information initialization code block before
HT information initialization one to match the ordering used
by rt2800pci's rt2800pci_probe_hw_mode().
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
* Factor out common code from rt2800[pci,usb]_validate_eeprom()
to rt2800_validate_eeprom().
* Fix interface specific comment in rt2800[pci,usb]_validate_eeprom().
* Enclose interface specific code in rt2800[pci,usb]_init_eeprom()
with rt2x00_intf_is_[pci,usb]() checks.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
ieee80211_rx_status->qual has been marked deprecated.
This allows us to remove several functions and fields which
were used to calculate a reasonable value for it.
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Gertjan van Wingerde <gwingerde@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Instead of assuming that all rt3090 devices will have an eFuse EEPROM,
do as the legacy Ralink driver, and detect at run-time whether an
eFuse EEPROM is present.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Acked-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Jumbograms are frames put together linked together through
more than one descriptor. For example ath9k_htc will use this
to send from the target a large frame split up into 2 or more
segments. The driver then would be in charge of putting the
frame back together.
When jumbograms are constructed the rx_stats->rs_more will
bet set and rx_stats->rs_status will not have any valid content
as the actual status will only be avialable at the end of
the chained descriptors.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This is now deprecated and unused within mac80211, so time
to remove it as otherwise we'd be doing some unecessary
computations for nothing.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
ath9k and ath9k_htc share a lot of common hardware characteristics.
They only differ in that ath9k_htc works with a target CPU and ath9k
works directly with the hardware. ath9k_htc will do *some* things in
the firmware, but a lot of others on the host.
The common 802.11n hardware code is already shared through the ath9k_hw
module. Common helpers amongst all Atheros drivers can use the ath module,
this includes ath5k and ar9170 as users. But there is some common driver
specific helpers which are not exactly hardware code which ath9k and
ath9k_htc can share. We'll be using ath9k_common for this to avoid
bloating the ath module and the common 802.11n hardware module ath9k_hw.
We start by sharing skb pre and post processing in preparation for a hand
off to mac80211.
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
