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Currently the i2400m driver was resetting by just calling
i2400m->bus_reset(). However, this was missing stopping the TX queue
and downing the carrier. This was causing, for the corner case of the
driver reseting a device that refuses to go out of idle mode, that a
few packets would be queued and more than one reset would go through,
making the recovery a wee bit messy.
To avoid introducing the same cleanup in all the bus-specific driver,
introduced a i2400m_reset() function that takes care of house cleaning
and then calling the bus-level reset implementation.
The bulk of the changes in all files are just to rename the call from
i2400m->bus_reset() to i2400m_reset().
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Some versions of the user space Intel WiMAX daemon need to have full
control over the device initialization sequence. By setting the module
option i2400.passive_mode to 1, the driver defers all device
configuration and initialization to user space.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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i2400m-sdio requires iwmc3200top for its operation
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Currently the SDIO part of the TX resources were initialized/released
with bus_dev_{start,stop}.
The generic code's TX subsystem is destroyed afterwards, so there is a
window from the bus-TX destruction to the generic-TX destruction where
the generic-TX code might call into bus-TX to do transactions.
The SDIO code cannot really cope with this (whereas in USB, how it is
laid out, it correctly ignores it). In any case, it made no sense for
the SDIO TX code to be in i2400m->bus_dev_start/stop(), so moved to
i2400m->bus_setup/release(), which also takes care of the oops.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In coming commits, the i2400m SDIO driver will not use
i2400m->bus_dev_stop().
Thus changed to check before calling, as an empty stub has more
overhead than a call to check if the function pointer is non-NULL.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Current i2400m USB code had to threads (one for processing RX, one for
TX). When calling i2400m_{tx,rx}_release(), it would crash if the
thread had exited already due to an error.
So changed the code to have the thread fill in/out
i2400mu->{tx,rx}_kthread under a spinlock; then the _release()
function will call kthread_stop() only if {rx,tx}_kthread is still
set.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Currently __i2400m_dev_start was forcing, after uploading firmware and
doing a few checks to WIMAX_ST_UNINITIALIZED.
This can be overriding state changes that the device might have caused
by sending reports; thus it makes more sense to remove it and let the
device update the status on its own by sending reports.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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All the entry points into the TX module should check if the device has
been torn down. Otherwise, when the device resets or shuts down, there
are windows when a call to i2400m_tx*() will oops the system.
For that, make i2400m_tx_release() set i2400m->tx_buf to NULL under
the tx_lock. Then, any entry point [i2400m_tx(), _tx_msg_sent(),
_tx_msg_get()] will check for i2400m->tx_buf to be NULL and exit
gracefully.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m might start sending reports to the driver before it is done
setting up all the infrastructure needed for handling them.
Currently we were just dropping them when the driver wasn't ready and
that is bad in certain situations, as the sync between the driver's
idea of the device's state and the device's state dissapears.
This changes that by implementing a queue for handling
reports. Incoming reports are appended to it and a workstruct is woken
to process the list of queued reports.
When the device is not yet ready to handle them, the workstruct is not
woken, but at soon as the device becomes ready again, the queue is
processed.
As a consequence of this, i2400m_queue_work() is no longer used, and
thus removed.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Upcoming changes will have to add things to this function that expose
more internals, which would mean more forward declarators.
Frankly, it doesn't need to be an inline, so moved to driver.c, where
the declarations will be taken from the header file.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Since the addition of the pre/post reset handlers, it became clear
that we cannot do a I2400M-RT-BUS type reset while holding the
init_mutex, as in the case of USB, it will deadlock when trying to
call i2400m_pre_reset().
Thus, the following changes:
- clarify the fact that calling bus_reset() w/ I2400M_RT_BUS while
holding init_mutex is a no-no.
- i2400m_dev_reset_handle() will do a BUS reset to recover a gone
device after unlocking init_mutex.
- in the USB reset implementation, when cold and warm reset fails,
fallback to QUEUING a usb reset, not executing a USB reset, so it
happens from another context and does not deadlock.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The stop procedure for the device must make sure that any task that is
waiting on a message is properly cancelled.
This was being taken care of only by the __i2400m_dev_reset_handle()
path and the rest was working by chance because the waits have a
timeout.
Fixed by adding a proper cancellation in __i2400m_dev_stop().
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The actual fw->size may not equal to the bcf size indicated in
the bcf header if the extended bcf debug header is added in the tail.
To reflect the actual fw size that will be downloaded to the device,
it is now retrived from from the size field indicated in the bcf header.
All of the headers (if there are extended headers) should indicate same
value for the size field since only one set of firmware chunks is downloaded
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
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Both secure and non-secure boot must set the JUMP command in the
bootmode header as the last FW chunk, so we change to use the JUMP
command to decide if the FW chunk download is completed.
Since we tend to use one single FW to support both secure and non-secure
boot for most of the time, I2400M_BRH_SIGNED_JUMP is actually found
even for non-secure boot. But in case the FW does come with
I2400M_BRH_JUMP, we check for both of them in i2400m_dnload_bcf().
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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tcpdump and friends were not being able to decode packets sent via
WiMAX; they had a zero ethernet type, even when the stack was properly
sending them to the device with the right type.
It happens that the driver was overwriting the (fake) ethernet header
for creating the hardware header and that was bitting the cloning used
by tcpdump (et al) to look into the packets.
Use pkskb_expand_head() [method copied from the e1000 driver] to fix.
Thanks to Herbert Xu and Andi Kleen for helping to diagnose and
pointing to the right fix.
Cc: Herbert Xu <gondor.apana.org.au>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Missed a debug message that was being constantly printed as a
dev_err(); became annoying. Demote it to a debug message.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The USB stack can callback a driver is about to be reset by an
external entity and right after it, so the driver can save state and
then restore it.
This commit implements said support; it is implemented actually in the
core, bus-generic driver [i2400m_{pre,post}_reset()] and used by the
bus-specific drivers. This way the SDIO driver can also use it once
said support is brought to the SDIO stack.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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After the introduction of i2400m->bus_setup/release, there is no more
race condition where the bootmode buffers are needed before
i2400m_setup() is called.
Before, the SDIO driver would setup RX before calling i2400m_setup()
and thus need those buffers; now RX setup is done in
i2400m->bus_setup(), which is called by i2400m_setup().
Thus, all the bootmode buffer management can now be done completely
inside i2400m_setup()/i2400m_release(), removing complexity from the
bus-specific drivers.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The SDIO subdriver of the i2400m requires certain steps to be done
before we do any acces to the device, even for doing firmware upload.
This lead to a few ugly hacks, which basically involve doing those
steps in probe() before calling i2400m_setup() and undoing them in
disconnect() after claling i2400m_release(); but then, much of those
steps have to be repeated when resetting the device, suspending, etc
(in upcoming pre/post reset support).
Thus, a new pair of optional, bus-specific calls
i2400m->bus_{setup/release} are introduced. These are used to setup
basic infrastructure needed to load firmware onto the device.
This commit also updates the SDIO subdriver to use said calls.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m driver uses two different bits to distinguish how much the
driver is up. i2400m->ready is used to denote that the infrastructure
to communicate with the device is up and running. i2400m->updown is
used to indicate if 'ready' and the device is up and running, ready to
take control and data traffic.
However, all this was pretty dirty and not clear, with many open spots
where race conditions were present.
This commit cleans up the situation by:
- documenting the usage of both bits
- setting them only in specific, well controlled places
(i2400m_dev_start, i2400m_dev_stop)
- ensuring the i2400m workqueue can't get in the middle of the
setting by flushing it when i2400m->ready is set to zero. This
allows the report hook not having to check again for the bit to be
set [rx.c:i2400m_report_hook_work()].
- using i2400m->updown to determine if the device is up and running
instead of the wimax state in i2400m_dev_reset_handle().
- not loosing missed messages sent by the hardware before
i2400m->ready is set. In rx.c, whatever the device sends can be
sent to user space over the message pipes as soon as the wimax
device is registered, so don't wait for i2400m->ready to be set.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Currently the i2400m driver was starting in a weird way: registering a
network device, setting the device up and then registering a WiMAX
device.
This is an historic artifact, and was causing issues, a some early
reports the device sends were getting lost by issue of the wimax_dev
not being registered.
Fix said situation by doing the wimax device registration in
i2400m_setup() after network device registration and before starting
thed device.
As well, removed spurious setting of the state to UNINITIALIZED;
i2400m.dev_start() does that already.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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When the i2400m device needs to wake up an idle WiMAX connection, it
schedules a workqueue job to do it.
Currently, only when the network stack called the _stop() method this
work struct was being cancelled. This has to be done every time the
device is stopped.
So add a call in i2400m_dev_stop() to take care of such cleanup, which
is now wrapped in i2400m_net_wake_stop().
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Make sure that i2400m_dev_bootstrap() doesn't overwrite the last known
error code with -ENOENT; when a firmware fails to load, we want to
know the cause and not a generic error code.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Current driver didn't implement the .reset_resume method. The i2400m
normally always reset on a comeback from system standby/hibernation.
This requires previously applied commits to cache the firmware image
file.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In preparation for a reset_resume implementation, have the firmware
image be cached in memory when the system goes to suspend and released
when out.
This is needed in case the device resets during suspend; the driver
can't load firmware until resume is completed or bad deadlocks
happen.
The modus operandi for this was copied from the Orinoco USB driver.
The caching is done with a kobject to avoid race conditions when
releasing it. The fw loader path is altered only to first check for a
cached image before trying to load from disk. A Power Management event
notifier is register to call i2400m_fw_cache() or i2400m_fw_uncache()
which take care of the actual cache management.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In preparation for reset_resume support, in which the same code path
is going to be used, add a diagnostic message to dev_reset_handle()
that can be used to distinguish how the device got there.
This uses the new payload argument added to i2400m_schedule_work() by
the previous commit.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Forthcoming commits use having a payload argument added to
i2400m_schedule_work(), which then becomes nearly identical to
i2400m_queue_work().
This patch thus cleans up both's implementation, making it share
common helpers and adding the payload argument to
i2400m_schedule_work().
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Add support for the WiMAX device in the Intel WiFi/WiMAX Link 6050
Series; this involves:
- adding the device ID to bind to and an endpoint mapping for the
driver to use.
- at probe() time, some things are set depending on the device id:
+ the list of firmware names to try
+ mapping of endpoints
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Different sdio device IDs are designated to support different intel
wimax silicon sku. The new macro SDIO_DEVICE_ID_IWMC3200_WIMAX_2G5(0x1407)
is added to support iwmc3200 2.5GHz sku. The existing
SDIO_DEVICE_ID_IWMC3200_WIMAX(0x1402) is for iwmc3200 general sku.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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request
Devices based on the i2400m emit a "barker" (32 bit unsigned) when
they boot. This barker is used to select, in the firmware file image,
which header should be used to process the rest of the file.
This commit implements said support, completing the series started by
previous commits.
We modify the i2400m_fw_dnload() firmware loading path by adding a
call to i2400m_bcf_hdr_find() [new function], in which the right BCF
header [as listed in i2400m->fw_hdrs by i2400m_fw_check()] is
located. Then this header is fed to i2400m_dnload_init() and
i2400m_dnload_finalize().
The changes to i2400m_dnload_finalize() are smaller than they look;
they add the bcf_hdr argument and use that instead of bcf. Likewise in
i2400m_dnload_init().
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The SBCF firmware format has been extended to support extra headers
after the main payload. These extra headers are used to sign the
firmware code with more than one certificate. This eases up
distributing single code images that work in more than one SKU of the
device.
The changes to support this feature will be spread in a series of
commits. This one just adds the support to parse the extra headers and
store them in i2400m->fw_hdrs. Coming changes to the loader code will
use that to determine which header to upload to the device.
The i2400m_fw_check() function now iterates over all the headers and
for each, calls i2400m_fw_hdr_check(), which does some basic checks on
each header. It then stores the headers for the bootloader code to use.
The i2400m_dev_bootstrap() function has been modified to cleanup
i2400m->fw_hdrs when done.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Make sure the bootloading code checks that the format of the file is
understood (major version match). This also fixes a dumb typo in
extracting the major version field.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m based devices can get in a sort of a deadlock some times;
when they boot, they send a reboot "barker" (a magic number) and then
the driver has to echo that same barker to ack reception
(echo/ack). Then the device does a final ack by sending an ACK barker.
The first time this happens, we don't know ahead of time with barker
the device is going to send, as different device models and SKUs will
send different barker depending on the EEPROM programming.
If the device has sent the barker before the driver has been able to
read it, the driver looses, as it doesn't know which barker it has to
echo/ack back. With older devices, we tried a couple of combinations
and that always worked; but now, with adding support for more, in
which we have an unlimited number of new barkers, that is not an
option.
So we rework said case so that when the device gets stuck, we just
cycle through all the known types until one forces the device to send
an ack. Otherwise, the driver gives up and aborts.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m firmware loader is given a list of firmware files to try to
load by the probe() function (which can be different based on the
device's model / generation).
Current code didn't attempt to load, check and try to boot with each
file, but just to try to load if off disk. This is limiting in some
cases, where we might want to try to load a firmware and if it fails
to load onto the device, just fall back to another one.
This changes the behaviour so all files are tried for being loaded
from disk, checked and uploaded to the device until one suceeds in
bringing the device up.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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This modifies the bootrom initialization code of the i2400m driver so
it can more easily support upcoming hardware.
Currently, the code detects two types of barkers (magic numbers) sent
by the device to indicate the types of firmware it would take (signed
vs non-signed).
This schema is extended so that multiple reboot barkers are
recognized; upcoming hw will expose more types barkers which will have
to match a header in the firmware image before we can load it.
For that, a barker database is introduced; the first time the device
sends a barker, it is matched in the database. That gives the driver
the information needed to decide how to upload the firmware and which
types of firmware to use. The database can be populated from module
parameters.
The execution flow is not altered; a new function
(i2400m_is_boot_barker) is introduced to determine in the RX path if
the device has sent a boot barker. This function is becoming heavier,
so it is put away from the hot reception path [this is why there is
some reorganization in sdio-rx.c:i2400ms_rx and
usb-notifc.c:i2400mu_notification_grok()].
The documentation on the process has also been updated.
All these modifications are heavily based on previous work by Dirk
Brandewie <dirk.brandewie@intel.com>.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m based devices can boot two main types of firmware images:
signed and non-signed. Signed images have signature data included that
must match that of a certificate stored in the device.
Currently the code is making the decission on what type of firmware
load (signed vs non-signed) is going to be loaded based on a hardcoded
decission in __i2400m_ack_verify(), based on the barker the device
sent upon boot.
This is not flexible enough as future hardware will emit more barkers;
thus the bit has to be set in a place where there is better knowledge
of what is going on. This will be done in follow-up commits -- however
this patch paves the way for it.
So the querying of the mode is packed into i2400m_boot_is_signed();
the main changes are just using i2400m_boot_is_signed() to determine
the method to follow and setting i2400m->sboot in
i2400m_is_boot_barker(). The modifications in i2400m_dnload_init() and
i2400m_dnload_finalize() are just reorganizing the order of the if
blocks and thus look larger than they really are.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The kernel's %zd modifier does not really work. Use %ld (has to cast
ssize_t to long).
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Add "debug" module options to all the wimax modules (including
drivers) so that the debug levels can be set upon kernel boot or
module load time.
This is needed as currently there was a limitation where the debug
levels could only be set when a device was succesfully
enumerated. This made it difficult to debug issues that made a device
not probe properly.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The i2400m driver was missing the definition for the sysfs debug
level, which is declared in debug-levels.h.
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In the Intel Wireless Multicomm 3200, the initialization is
orchestrated by a component called Top. This component also monitors
how many times a function is reset (via sdio_disable) to detect
possible issues and will reset the whole multifunction device if any
function triggers a maximum reset level.
During WiMAX's probe, the driver needs to wait for Top to come up
before it can enable the WiMAX function. If it cannot, it will return
-ENODEV and the Top driver will rescan the SDIO bus once done
loading.
Currently, the WiMAX SDIO probe routine was trying a few times before
returning -ENODEV, and this was triggering Top's too-many-resets
detector. This is, in any case, unnecessary because the Top driver will
force the bus rescan when the functions can be probed successfully.
Added then a maxtries argument to i2400ms_enable_func() and set it to
1 when calling from probe. We want to reuse this function instead of
flat calling out sdio_enable_func() to take advantage of hardware
quirk workarounds.
Reported-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In kernel 2.6.31, the firmware requested to ram could be marked
with read only attribute, and we can't write any thing directly
to the memory when setting up the last JUMP brh cmd.
Changed so that the scratch buffer is used.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Because some underlying bus APIs (like USB) don't like data buffers in
the stack or vmalloced areas, the i2400m driver provides a scratch
buffer (i2400m->bm_cmd_buf) for said low-level drivers to copy command
data to before passing it to said API. This is only used during boot
mode.
However, at some the code was copying the buffer even when the command
was already specified in said buffer. This is ok, but it needs to be
more careful. As thus, change so that:
(a) the copy happens only if command buffer is not the scratch buffer
(b) use memmove() in case there is overlapping
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In order to avoid issues during high-load traffic, the interrupt
status register has to be cleared ONLY after the RX size is read.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Newer generations of the i2400m USB WiMAX device use a different
endpoint map; in order to make it easy to support it, we make the
endpoint-to-function mapeable instead of static.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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When trying to enable the iwmc3200 WiMAX SDIO function, we loop
waiting for the top controller to be up and running (at which point we
can succesfully enable the function). Between each try we wait for
I2400MS_INIT_SLEEP_INTERVAL ms.
Integration tests have found the current value of 10ms to be too
short; it was upped to 100ms to give more time to the top controller
to be ready.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In the iwmc3200, disabling the WiMAX SDIO function when enable fails
would possibly result in a device reset triggered by the iwmc3200's
top controller since it monitors the bus reset activities from each
SDIO function. In any case, the disable makes no sense; if the enable
fails, it should not be disabled.
Thus we remove the unecessary sdio_disable_func() in
i2400ms_enable_function().
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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The default SDIO IOE wait timeout returned from iwmc3200-wimax's CCCR
is not efficient. This inefficiency will actually cause problems on
Moorestown platforms (system hang).
This is a sillicon bug that requires a software patch to by
overwritting func->enable_timeout. The new value I2400MS_IOR_TIMEOUT
is recommended and verified from the system integration results.
Future sillicon releases will have this default value corrected in the
future.
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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In i2400m-based devices, the driver's bootloader will retry to load
the firmware when things go wrong. The driver currently has a constant
(I2400M_BOOT_RETRIES) which governs the max number of tries.
However, different SKUs of the same hardware may admit or require
different numbers of retries due to it's particulars, so it is made a
BUS specific parameter and different values are assigned for 5x50
devices versus the 3200 ones.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Cindy H Kao <cindy.h.kao@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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message
The change to the SDIO boot mode RX chain could try to use the cmd and
ack buffers befor they were allocated. USB does not have the problem
but both were changed for consistency's sake.
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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Fixing comments from original cut and paste error
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Inaky Perez-Gonzalez <inaky@linux.intel.com>
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