While checkpatch another patch I got a:
"WARNING: msleep < 20ms can sleep for up to 20ms"
The datasheet of at86rf231 and at86rf212 says a minimum delay for reset
pulse width and spi access latency after reset is 625 nanoseconds.
This patch removes the 1 milliseconds sleep and replace it with a 1
microseconds udelay which should be also okay for the reset pulse width.
To change the state from RESET -> TRX_OFF the at86rf230 device needs 120
microseconds, this is a worst case of all at86rf* chips.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need to lock the clearing of IRQ_TRX_END in status.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fix a unexpected state change for the at86rf231 chip.
We can't change into STATE_FORCE_TX_ON while the chip is in one of
SLEEP, P_ON, RESET, TRX_OFF, and all *_NOCLK states.
In this case we are in the TRX_OFF state. See datasheet [1] page 71 for
more information.
Without this patch you will get the following message on a at86rf231 device:
[ 20.065218] unexpected state change: 8, asked for 4
[ 20.070527] ------------[ cut here ]------------
[ 20.075414] WARNING: CPU: 0 PID: 160 at net/mac802154/ieee802154_dev.c:43 mac802154_slave_open+0x70/0xb8()
[ 20.085594] Modules linked in: autofs4
[ 20.089667] CPU: 0 PID: 160 Comm: ifconfig Not tainted 3.14.0-20140108-1-00993-g905c192 #162
[ 20.098612] [<c00127b8>] (unwind_backtrace) from [<c0010b1c>] (show_stack+0x10/0x14)
[ 20.106819] [<c0010b1c>] (show_stack) from [<c0033838>] (warn_slowpath_common+0x60/0x80)
[ 20.115311] [<c0033838>] (warn_slowpath_common) from [<c00338e8>] (warn_slowpath_null+0x18/0x20)
[ 20.124590] [<c00338e8>] (warn_slowpath_null) from [<c057b7e8>] (mac802154_slave_open+0x70/0xb8)
[ 20.133880] [<c057b7e8>] (mac802154_slave_open) from [<c0488a58>] (__dev_open+0xa8/0x108)
[ 20.142553] [<c0488a58>] (__dev_open) from [<c0488cb0>] (__dev_change_flags+0x8c/0x148)
[ 20.151051] [<c0488cb0>] (__dev_change_flags) from [<c0488d84>] (dev_change_flags+0x18/0x48)
[ 20.159968] [<c0488d84>] (dev_change_flags) from [<c04e2e9c>] (devinet_ioctl+0x2b0/0x63c)
[ 20.168623] [<c04e2e9c>] (devinet_ioctl) from [<c04712e4>] (sock_ioctl+0x23c/0x29c)
[ 20.176727] [<c04712e4>] (sock_ioctl) from [<c00e3cb8>] (do_vfs_ioctl+0x4a8/0x578)
[ 20.184671] [<c00e3cb8>] (do_vfs_ioctl) from [<c00e3dd4>] (SyS_ioctl+0x4c/0x78)
[ 20.192402] [<c00e3dd4>] (SyS_ioctl) from [<c000da00>] (ret_fast_syscall+0x0/0x48)
[ 20.200392] ---[ end trace 9a34542f4ea08e47 ]---
This patch was tested on at86rf231 and at86rf212.
[1] http://www.atmel.com/images/doc8111.pdf
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Conflicts:
drivers/net/usb/r8152.c
drivers/net/xen-netback/netback.c
Both the r8152 and netback conflicts were simple overlapping
changes.
Signed-off-by: David S. Miller <davem@davemloft.net>
Change all internal uses of ieee802154_addr_sa to ieee802154_addr,
except for those instances that communicate directly with userspace.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Enable sparse warnings about endianness, replace the remaining fields
regarding network operations without explicit endianness annotations
with such that are annotated, and propagate this through the entire
stack.
Uses of ieee802154_addr_sa are not changed yet, this patch is only
concerned with all other fields (such as address filters, operation
parameters and the likes).
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The struct as currently defined uses host byte order for some fields,
and most big endian/EUI display byte order for other fields. Inside the
stack, endianness should ideally match network byte order where possible
to minimize the number of byteswaps done in critical paths, but this
patch does not address this; it is only preparatory.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The rf233 and rf231 are sufficiently similar that we can treat
rf233 like rf231.
rf233 is missing some features that rf231 has, but we don't currently
make use of them so there's nothing to handle differently yet.
Should we add support in the future for rf231 *_NOCLK or SLEEP states,
or PAD_IO drive strength, exceptions will need to be made for rf233.
Signed-off-by: Thomas Stilwell <stilwellt@openlabs.co>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes some whitespace issues in Kconfig files of IEEE
802.15.4 subsytem.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since commit 8fad346f36
(ieee802154: add basic support for RF212 to at86rf230 driver)
we support at86rf212 as well.
Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The commit 9b2777d608 ("ieee802154: add TX power control to
wpan_phy") introduced the new function at86rf212_set_txpower() with
the questionable check of the return of __at86rf230_write() in the
exit path:
1) Both at86rf212_set_txpower() and __at86rf230_write() have the
same return type.
2) Whatever __at86rf230_write() returns becomes the return value of
at86rf212_set_txpower().
Thus, fix the exit path by getting rid of that check entirely.
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Cc: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The commit 8fad346f36 ("eee802154: add basic support for RF212 to
at86rf230 driver") introduced the new function is_rf212() with some
minor issues in declaration:
1) Fix the function type by changing it to bool as the function
definition returns a boolean value. Additionally both callers of
is_rf212() are expected to return a boolean value.
2) Fix the function specifier by deleting the inline keyword as the
compiler takes care of that.
Signed-off-by: Jean Sacren <sakiwit@gmail.com>
Cc: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch does multiple things:
* add .set_csma_params and .set_frame_retries for the RF212 radio.
This should work fine with RF230, but since I have no RF230 radios to
test with, RF230 does not implement these right now
* enable TX_ARET for frame retransmission limits greater than -1
Since RF230 has no operations to change CSMA parameters or frame retry
limits, RF230 will not be able to enter TX_ARET with this patch.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
A documented erratum of the RF212 chip describes that some versions of
RF212 may not be properly reset by the standard reset procedure. The
described workaround seems to not fully work either; my RF212 chips will
not correctly receive any frames unless they are taken from RX mode to
TRX_OFF and back to RX mode, effectively forcing a up-down-up-cycle.
Going to TRX_OFF and to RX without intermediate state changes at least
once fixes this.
The same transition is allowed for RF230, so simply do it all the time.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since three of the four clear channel assesment modes make use of energy
detection, provide an API to set the energy detection threshold.
Driver support for this is available in at86rf230 for the RF212 chips.
Since for these chips the minimal energy detection threshold depends on
page and channel used, add a field to struct at86rf230_local that stores
the minimal threshold. Actual ED thresholds are configured as offsets
from this value.
For RF212, setting the ED threshold will not work before a channel/page
has been set due to the dependency of energy detection in the chip and
the actual channel/page selected.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The standard describes four modes of clear channel assesment: "energy
above threshold", "carrier found", and the logical and/or of these two.
Support for CCA mode setting is included in the at86rf230 driver,
predicated for RF212 chips.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Listen-before-talk is an alternative to CSMA in uncoordinated networks
and prescribed by european regulations if one wants to have a device
with radio duty cycles above 10% (or less in some bands). Add a phy
property to enable/disable LBT in the phy, including support in the
at86rf230 driver for RF212 chips.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The standard assigns channel 0 on page 2 to be 100kbps QPSK in the
868.3MHz band. Add support to the at86rf230 driver for this channel and
page, at the moment predicated only for the RF212 chip.
Per the datasheet, configurations for page 0, channels 0 to 10 and page
2, channels 0 to 10 differ only in the BPSK_QPSK bit. Support for
channels 1 to 10 is untested.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Replace the current u8 transmit_power in wpan_phy with s8 transmit_power.
The u8 field contained the actual tx power and a tolerance field,
which no physical radio every used. Adjust sysfs entries to keep
compatibility with userspace, give tolerances of +-1dB statically there.
This patch only adds support for this in the at86rf230 driver and the
RF212 chip. Configuration calculation for RF212 is also somewhat basic,
but does the job - the RF212 datasheet gives a large table with
suggested values for combinations of TX power and page/channel, if this
does not work well, we might have to copy the whole table.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The current IEEE802.15.4 stack assumes that a radio will never deliver
packets with a bad CRC into the stack, as required by the standard.
at86rf230 driven radios violates this assumption because of another
incompatibility: devices are required to send ACKs if requested by a
sender, but RF2xx will only send ACKs from a special receive mode that
is currently not used by the driver.
Enable this receive mode to fix both bugs. Frames with bad CRCs will not
be received at all, and ACKs will be sent if so requested.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the AT86RF2xy chips are mostly compatible, this is only a small
change to the actual driver code. The at86rf230 driver already supports the
RF212 in most places, only three small adjustments are required:
* force the initial state after P_ON to FORCE_TRX_OFF to work around a
documented erratum
* channels_supported depends on the frequency of the transceiver, and
thus is_rf212
* do early detection of chip version select an appropriate _ops struct
based on the chip version.
Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use this new function to make code more comprehensible, since we are
reinitialzing the completion, not initializing.
[akpm@linux-foundation.org: linux-next resyncs]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The mrf24j40 generates level interrupts. There are rare cases where it
appears that the interrupt line never gets de-asserted between interrupts,
causing interrupts to be lost, and causing a hung device from the driver's
perspective. Switching the driver to interpret these interrupts as
level-triggered fixes this issue.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eliminate all the workqueue and interrupt enable/disable.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This avoids a race condition where complete(tx_complete) could be called
before tx_complete is initialized.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since commit ab78029 (drivers/pinctrl: grab default handles from device core),
we can rely on device core for setting the default pins. Compile tested only.
Acked-by: Linus Walleij <linus.walleij@linaro.org> (personally at LCE13)
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Implemented separate irq handling for edge and level type interrupt
configuration. For edge type interrupts calls to disable_irq_nosync()
and enable_irq() are removed. The at86rf230 resets the irq line only
after the irq status register is read. Disabling the irq can lock the
driver in situations where a irq is set by the radio while the driver
is still reading the frame buffer.
With irq_type configuration set to 0 the original behavior is
preserverd.
Additional the irq filter register is set to filter out all unused
interrupts and the irq status register is read in the probe
function to clear the irq line.
Signed-off-by: Sascha Herrmann <sascha@ps.nvbi.de>
Conflicts:
drivers/net/ieee802154/at86rf230.c
Signed-off-by: David S. Miller <davem@davemloft.net>
Add option to at86rf230 platform data to configure the type of the
interrupt used by the driver. The irq polarity of the device will
be configured accordingly.
Signed-off-by: Sascha Herrmann <sascha@ps.nvbi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
module_spi_driver() makes the code simpler by eliminating
boilerplate code.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
On the MRF24J40, link-layer acknowledgment request and retry must be
turned on explicitly for each packet. Turn this on in the hardware based
on the FC_ACK_REQ bit being set in the packet.
Also, now that failure to receive an ACK will cause the hardware to report
failure of transmission, change the log level for this failure to debug
level.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
In at86rf230_probe() lp was first set to dev->priv and a few lines later
dev->priv was set to lp again, without changing lp in between. The call
to ieee802154_unregister_device() before err_irq: was unreachable.
Signed-off-by: Sascha Herrmann <sascha@ps.nvbi.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
It served no purpose: we never call it from anywhere in the stack
and the only driver that did implement it (fakehard) merely provided
a dummy value.
There is also considerable doubt whether it would make sense to
even attempt beacon processing at this level in the Linux kernel.
Signed-off-by: Werner Almesberger <werner@almesberger.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use the wrapper functions for getting and setting the driver data using
spi_device instead of using dev_{get|set}_drvdata with &spi->dev, so we
can directly pass a struct spi_device.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The register names have been wrong since the beginning but it only showed up now
as they are actualy used for the upcoming auto ACK support.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Implement the filter function to update short address, pan id and ieee
address on change. Allowing for hardware address filtering needed for
auto ACK.
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Load the 64-bit Extended (IEEE) address into the hardware in the proper
byte order.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Upon consulting the datasheet further, it does indicates a maximum speed
for SCK at 10MHz.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
Issue a warning if a transmit complete interrupt doesn't happen in time.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need to implement empty suspend/resume callbacks if there is nothing
to do during suspend/resume. The drivers will behave the same with no callbacks
or empty callbacks during suspend/resume.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
perm_addr is initialized correctly in register_netdevice() so to init it in
drivers is no longer needed.
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
CONFIG_HOTPLUG is going away as an option. As result the __dev*
markings will be going away.
Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.
Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
The network merge brought in a few users of functions that got
deprecated by the workqueue cleanups: the 'system_nrt_wq' is now the
same as the regular system_wq, since all workqueues are now non-
reentrant.
Similarly, remove one use of flush_work_sync() - the regular
flush_work() has become synchronous, and the "_sync()" version is thus
deprecated as being superfluous.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Driver for the Microchip MRF24J40 802.15.4 WPAN module.
Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
The IEEE 802.15.4 standard represents a networking protocol. I don't
exactly know why drivers for this protocol are stored into the root
'driver' folder, but better will be to store them with other
networking stuff. Currently there are only 3 drivers available for
IEEE 802.15.4 stack, so lets do it now with the smallest overhead.
Signed-off-by: Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alexander Aring