This patch adds a calibration timeout reset when change from TRX_OFF to
TX_ARET_ON which also occurs a calibration.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NVarka Bhadram <varkabhadram@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch moves the calculation timeout of TRX_OFF to RX_AACK_ON
handling to the async state change functionality. With this patch we can
do a reset of calculation timeout when others TRX_OFF to RX_AACK_ON
happens instead of doing this on interface up only.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NVarka Bhadram <varkabhadram@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch cleanups the at86rf230 driver to use a space instead a tab
after define.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NVarka Bhadram <varkabhadram@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Instead of using the 'magic' number of 0x1f the TRX_STATE_MASK macro is
introduced.
Signed-off-by: NChristoffer Holmstedt <christoffer.holmstedt@gmail.com>
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Netlink attribute for the power is s8. But for the driver level
operations we are collection power level value into integer.
It has to be change to s8 from int.
Signed-off-by: NVarka Bhadram <varkab@cdac.in>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch fix the error handling when is_tx is true. The error handling
tries to get the transceiver into RX_AACK_ON mode then we need to be
sure that is_tx is false.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This spinlock isn't necessary because if we are in TX_ON/TX_ARET_ON
state the transceiver can't be interrupted e.g. by receiving a frame
when a SHR was detected. In this time the transceiver doesn't leave
the TX_ON/TX_ARET_ON state until the tx complete irq change the state
into RX_AACK_ON again. This means a receiving interrupt in state
TX_ON/TX_ARET_ON can't happen and is_tx is protected by transceiver.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch fix an issue when at86rf230_read_subreg was successful. The
function at86rf230_read_subreg will directly call regmap_read which
returns zero on successful. Nobody figured out issues yet because it was
only necessary to evaluate dvdd state while probing. This could make
trouble because the stack variable could have an random value.

The function is also used by reset the irq line before requesting irq, but
the value isn't evaluated afterwards.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

These registers are also changed by transceiver and should be volatile
for right accessing via regmap debugfs.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch adds a handling for calibration if we are 5 minutes in PLL
state. I first tried to implement the calibration functionality in
TX_ON state via register values CF_START and DCU_START, but this occurs
a one second delay at each calibration time.

An another solution to start a calibration is to switch from TRX_OFF
state into TX_ON, then a calibration is done automatically by
transceiver. This method will be used in this patch, after each transmit
of a frame we check with jiffies if the PLL is set 5 minutes without
doing a TRX_OFF->(TX_ON || RX_AACK_ON) or channel switch. The worst case
would be a transceiver in receiving mode only, but this is under normal
operation very unlikely.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Cc: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Cc: Werner Almesberger <werner@almesberger.net>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch replace the state change timing relevant sleeps with
hrtimers. Currently the sleeps are done in the complete handler of
spi_async. The relation of doing the state change timing sleep with a
timer will get the sleep functionality out of spi_async complete handler
context.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch initialize xtal_trim value to zero. The xtal_trim property is
an optional device tree value. Currently if no xtal_trim property is
given the xtal_trim value can be contain random data, because it's a
stack variable. This patch init the xtal_trim value to zero which is
also the default value after reset for at86rf230 transceivers.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

In the most cases the spi messages has a length of two. Currently we
always set the the len field to two before transmit a spi message. In
cases for read out/write in the frame buffer we need another len. This
patch use trx len two as default. For the frame buffer cases we restore
the trx len to two on success and failure. This will reduce the len
setting of two when it's already two.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch cleanups the referencing for the state change context
variable. The state change context should only set once and this is by
initial a state change. This patch will use the initial state change
variable in the complete handler of the state change by using the ctx
context which should be always the same like the initial state change
context.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

By holding the irq variable inside at86rf230_state_change we can squash
some multiple dereferencing for getting irq num.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch refactor the receive handling into one function.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

I had this variable because I thought it would be protected by
disable/enable irq but this is not true. It's protected by stop/wake
netdev queue which is called by ieee802154_xmit_complete.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch introduce a transmit retry handling into at86rf230 transmit
path. Current behaviour is to wait the normal receive time if we want
to go into STATE_TX_ON when the transceiver is in STATE_BUSY_RX_AACK
which indicates that a frame is currently receiving. A non force state
change will not interrupt the the receiving state.

The current behaviour is that after the normal receive time we will
start a force change into STATE_TX_ON. With this patch we do seven
retries to go into STATE_TX_ON without forcing. After we hit the
AT86RF2XX_MAX_TX_RETRIES we will start the force state change.
This is a polling like method to go into STATE_TX_ON in times of maximum
receiving time.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

While testing I experience a deadlock while using the at86rf233 on a
raspberry pi. The reason was an edge triggered gpio irq because the irq
triggered while irq was disabled. This issue doesn't happend on a level
triggered irq because the irq will hit after calling enable_irq.

This patch adds a warning that it's not recommended to use a edge-triggered
irq type. Also change the examples to high-level irqtype.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The at86rf2xx chips supports the setting of irq polarity if active low
or active high. This patch adds a handling for IRQ_ACTIVE_LOW if the
irq_type is IRQ_TYPE_LEVEL_LOW.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Since we support at86rf233 we need to ensure that basic operation
default values are the same. This patch always sets IRQ_MASK_MODE to 0
which is after reset 1 at the at86rf233 and 0 at the at86rf231.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch removes tx_timeout handling. We used it in sync xmit
handling. Since we support async xmit handling a xmit timeout handling
isn't easy to implement and should be implemented by netdev watchdog
mechanism.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch adds support for setting the xtal trim register. Some at86rf2xx
transceiver boards needs fine tuning the xtal capacitor.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch copies the platform data in driver allocated space at first.
With this change we ensure that we access the allocated platform data as
readonly space.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reported-by: NMarc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

return type of wait_for_completion_timeout is unsigned long not int.
As rc is used here only for wait_for_completion_timeout the type is simply
changed to unsigned long.
Signed-off-by: NNicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This version check allows the driver to only work with v=1 hardware
however there is no driver-facing difference with newer versions
(confirmed by Atmel FAEs) so this check needlessly prevents the driver
from being used with radios now in production.

Tested on AT86RF212B radio (which came up as v=3).
Signed-off-by: NAndrey Yurovsky <yurovsky@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The driver was reading the PART_NUM register for both the part number
(type of device) and the part version, the version is actually in
register 0x1D, VERSION_NUM.  I believe that this was a copy-paste error.

Tested on AT86RF212B where the part is detected to be the expected part
number (0x07) and version (0x03 on mine).
Signed-off-by: NAndrey Yurovsky <andrey@snupi.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The attribute extra_tx_headroom should already be zero.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch changes the context pointer to the parameter given one inside
function at86rf230_async_state_change_start. This could occur problem if
context isn't pointed to lp->state.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch makes the at86rf230_async_error inline. This function is
small enough to handle inline.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch removes an unnecessary if branch inside the tx complete
handler.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Reviewed-by: NStefan Schmidt <s.schmidt@samsung.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Signed-off-by: NStefan Schmidt <s.schmidt@samsung.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Signed-off-by: NStefan Schmidt <s.schmidt@samsung.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

Signed-off-by: NStefan Schmidt <s.schmidt@samsung.com>
Acked-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch adds the default cca setting after device reset for at86rf230
driver.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

The current cca setting handle is a driver specific call. We need to
introduce some 802.15.4 specific layer and mapping 802.15.4 cca modes to
driver specific ones inside the 802.15.4 driver. This patch will add
such 802.15.4 layer and mapping the cca settings to driver specific ones.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch fix an copy&paste issue in the comment of setting symbol
duration. These comments are more correct according the at86rf212 datasheet
now.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

This patch removes the interframe spacing time workaround from at86rf230
driver and use the mac802154 one. The interframe spacing time differs at
at86rf212 and channel setting. This patch fix this handling which is also
a new workaround and should be moved into mac802154 while channel
setting.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>