wfx: get out from the staging area

The wfx driver is now mature enough to leave the staging area.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Signed-off-by: Kalle Valo <kvalo@kernel

wfx: get out from the staging area

The wfx driver is now mature enough to leave the staging area.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>

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staging: wfx: sta.o was linked twice

sta.o was listed twice in the Makefile.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220225112405.355599-2-Jero

staging: wfx: sta.o was linked twice

sta.o was listed twice in the Makefile.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220225112405.355599-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: explain uncommon Makefile statement

I have got questions about this line from several reviewers. A comment
is definitively welcome.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@sil

staging: wfx: explain uncommon Makefile statement

I have got questions about this line from several reviewers. A comment
is definitively welcome.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220113085524.1110708-6-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: fix Makefile and Kconfig licenses

License was missing in Kconfig.

Makefile license was GPL-2.0 while rest of the driver use GPL-2.0-only.

Signed-off-by: Jérôme Pouiller <jerome.pouil

staging: wfx: fix Makefile and Kconfig licenses

License was missing in Kconfig.

Makefile license was GPL-2.0 while rest of the driver use GPL-2.0-only.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20220113085524.1110708-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: place hif_tx_mib functions into a .c file

Until now, all functions from hif_tx_mib.h are declared "static inline".
However, they are not time critical. So, it does not make so much sen

staging: wfx: place hif_tx_mib functions into a .c file

Until now, all functions from hif_tx_mib.h are declared "static inline".
However, they are not time critical. So, it does not make so much sense.

We prefer to place them in a .c file as for other hif functions.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20200406111756.154086-9-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: implement 802.11 key handling

wfx_set_key() mostly copy bytes on correct offsets. A big piece of code
for a simple work. Unfortunately, I did not found any way to factorize
it.

Signed

staging: wfx: implement 802.11 key handling

wfx_set_key() mostly copy bytes on correct offsets. A big piece of code
for a simple work. Unfortunately, I did not found any way to factorize
it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-20-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: allow to scan networks

Chip can make foreground scan or background, but both can't be mixed in
same request. So, we need to split each mac80211 requests into multiple
HIF requests.

Si

staging: wfx: allow to scan networks

Chip can make foreground scan or background, but both can't be mixed in
same request. So, we need to split each mac80211 requests into multiple
HIF requests.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-19-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: allow to receive 802.11 frames

Again, this task is more complex than it should since driver try to
handle itself power saving of stations.

Signed-off-by: Jérôme Pouiller <jerome.pouil

staging: wfx: allow to receive 802.11 frames

Again, this task is more complex than it should since driver try to
handle itself power saving of stations.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-18-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: allow to send 802.11 frames

Three things make this task more complex than it should:
- Chip necessitate to associate a link-id to each station. It is same
thing than association

staging: wfx: allow to send 802.11 frames

Three things make this task more complex than it should:
- Chip necessitate to associate a link-id to each station. It is same
thing than association ID but, using 8 bits only.
- Rate policy is sent separately from Tx frames
- Driver try to handle itself power saving of stations and multicast
data

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-17-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: allow to send commands to chip

Chip has multiple input buffers and can handle multiple 802.11 frames
in parallel. However, other HIF command must be sent sequentially.
wsm_send_cmd() h

staging: wfx: allow to send commands to chip

Chip has multiple input buffers and can handle multiple 802.11 frames
in parallel. However, other HIF command must be sent sequentially.
wsm_send_cmd() handles these requests.

This commit also add send_hif_cmd in debugfs. This file allows to send
arbitrary commands to chip. It can be used for debug and testing.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-12-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: instantiate mac80211 data

Allocate a struct ieee80211_hw but do not yet register it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/201909

staging: wfx: instantiate mac80211 data

Allocate a struct ieee80211_hw but do not yet register it.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-11-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: add support for start-up indication

Once firmware is loaded, it send a first indication to host. This
indication signalize that host can start to communicate with firmware.
In add, it

staging: wfx: add support for start-up indication

Once firmware is loaded, it send a first indication to host. This
indication signalize that host can start to communicate with firmware.
In add, it contains information about chip and firmware (MAC addresses,
firmware version, etc...).

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-10-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: add IRQ handling

bh_work() is in charge to schedule all HIF message from/to chip.

On normal operation, when an IRQ is received, driver can get size of
next message in control register

staging: wfx: add IRQ handling

bh_work() is in charge to schedule all HIF message from/to chip.

On normal operation, when an IRQ is received, driver can get size of
next message in control register. In order to save control register
access, when chip send a message, it also appends a copy of control
register after the message (this register is not accounted in message
length declared in message header, but must accounted in bus request).
This copy of control register is called "piggyback".

It also handles a power saving mechanism specific to WFxxx series. This
mechanism is based on a GPIO called "wakeup" GPIO. Obviously, this gpio
is not part of SPI/SDIO standard buses and must be declared
independently (this is the main reason for why SDIO mode try to get
parameters from DT).

When wakeup is enabled, host can communicate with chip only if it is
awake. To wake up chip, there are two cases:
- host receive an IRQ from chip (chip initiate communication): host
just have to set wakeup GPIO before reading data
- host want to send data to chip: host set wakeup GPIO, then wait
for an IRQ (in fact, wait for an empty message) and finally send data

bh_work() is also in charge to track usage of chip buffers. Normally
each request expect a confirmation. However, you can notice that special
"multi tx" confirmation can acknowledge multiple requests at time.

Finally, note that wfx_bh_request_rx() is not atomic (because of
control_reg_read()). So, in SPI mode, hard-irq handler only postpone all
processing to wfx_spi_request_rx().

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-8-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: load firmware

A firmware is necessary to run the chip. wfx_init_device() is in charge
of loading firmware on chip and doing low level initialization.

Firmwares for WF200 are available

staging: wfx: load firmware

A firmware is necessary to run the chip. wfx_init_device() is in charge
of loading firmware on chip and doing low level initialization.

Firmwares for WF200 are available here:

https://github.com/SiliconLabs/wfx-firmware/

Note that firmware are encrypted. Driver checks that key used to encrypt
firmware match with key burned into chip.

Currently, "C0" key is used for production chips.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-6-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: add tracepoints for I/O access

Some tracepoints are useful for debugging.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31

staging: wfx: add tracepoints for I/O access

Some tracepoints are useful for debugging.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-5-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: add I/O API

hwio.c provides an abstraction to access different types of register of
the chip.

Note that only data register (aka FRAME_OUT) and control register are
used normal communi

staging: wfx: add I/O API

hwio.c provides an abstraction to access different types of register of
the chip.

Note that only data register (aka FRAME_OUT) and control register are
used normal communication. Other registers are only used during chip
start up.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-4-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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staging: wfx: add infrastructure for new driver

Instantiate build infrastructure WFx driver. This driver provides support
for Wifi chipset Silicon Labs WF200 and further:

https://www.silabs.com/

staging: wfx: add infrastructure for new driver

Instantiate build infrastructure WFx driver. This driver provides support
for Wifi chipset Silicon Labs WF200 and further:

https://www.silabs.com/documents/public/data-sheets/wf200-datasheet.pdf

This chip support SPI and SDIO bus.

SDIO interface has two particularities:
1. Some parameters may be useful for end user (I will talk about
gpio_wakeup later).
2. The SDIO VID and PID of WF200 are 0000:0001 which are too much
generic to rely on.

So, current code checks VID/PID and looks for a node in DT (since WF200
targets embedded platforms, I don't think it is a problem to rely on
DT). DT can also be used to define to parameters for driver. Currently,
if no node is found, a warning is emitted, but it could be changed in
error.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20190919142527.31797-2-Jerome.Pouiller@silabs.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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