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path: root/drivers/staging/wfx/main.c
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2020-07-03staging: wfx: add a debugfs entry to force ps_timeoutJérôme Pouiller
In some advanced usage or debug scenarios, it could interesting to change the value of ps_timeout or eventually to force use of PS-Poll frames. The wext API (used by iwconfig) provide a way to change ps_timeout. However, this API is obsolete and it seems a little weird to use (it seems it does apply the change, so the user have to disable then re-enable de power save) On side of nl80211, there is no way to change the ps_timeout. This patch provides a file in debugfs to change the value of ps_timeout. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200701150707.222985-13-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-07-03staging: wfx: associate tx_queues to vifsJérôme Pouiller
The device handles 4 queues (one per AC) for each virtual interface (and maximum 4 virtual interfaces). Until now the driver unified the queue of all interfaces and handled only 4 queues for whole device. This architecture did not allow to balance the traffic between the vif. So, this patch relocate the queues into the vif and change the API accordingly. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200701150707.222985-2-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-27staging: wfx: add support for tx_power_loopJérôme Pouiller
During the calibration of the RF amplifier, the device is able to provide some data about the status of the amplifier. Record these data and expose them in debugfs. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200526171821.934581-5-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-15staging: wfx: apply 80-columns rule to stringsJérôme Pouiller
Strings are allowed to exceed 80 columns but, in this case, the format arguments should be placed on a new line. Apply this rule to the whole code of the driver. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200515083325.378539-3-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: fix endianness of the field 'status'Jérôme Pouiller
The field 'status' appears in most of structs returned by the hardware. This field is encoded as little endian. Sparse complains this field is not always correctly accessed: drivers/staging/wfx/data_rx.c:53:16: warning: restricted __le32 degrades to integer drivers/staging/wfx/data_rx.c:84:16: warning: restricted __le32 degrades to integer drivers/staging/wfx/data_tx.c:526:24: warning: restricted __le32 degrades to integer drivers/staging/wfx/data_tx.c:569:23: warning: restricted __le32 degrades to integer drivers/staging/wfx/hif_rx.c:128:33: warning: restricted __le32 degrades to integer drivers/staging/wfx/./traces.h:401:1: warning: restricted __le32 degrades to integer drivers/staging/wfx/./traces.h:401:1: warning: restricted __le32 degrades to integer In most of cases, this field is only compared with HIF_STATUS values. Finally, it is more convenient to solve the problem by defining the HIF_STATUS values directly in little endian. It is also the right time to make some clean up in the HIF_STATUS names. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200512150414.267198-15-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: use kernel types instead of c99 onesJérôme Pouiller
The kernel coding style promotes the use of kernel types (u8, u16, u32, etc...) instead of the C99 ones. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-16-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: remove spaces after cast operatorJérôme Pouiller
The kernel coding style expects no space after cast operator. This patch make the wfx driver compliant with this rule. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-15-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: fix alignements of function prototypesJérôme Pouiller
Some function prototypes were not correctly aligned and/or exceed 80 columns. In some other cases, the prototypes were written on more lines than necessary. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-14-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: remove useless header inclusionsJérôme Pouiller
In order to keep the compilation times reasonable, we try to only include the necessary headers (especially header included from other headers). This patch clean up unnecessary headers inclusions. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-13-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: poll IRQ during initJérôme Pouiller
When the chip starts in SDIO mode, the external IRQ (aka Out-Of-Band IRQ) cannot be used before to configure it. Therefore, the first exchanges with the chip have to be done without the OOB IRQ. This patch allow to poll the data until the OOB IRQ is correctly setup. In order to keep the code simpler, this patch also poll data even if OOB IRQ is not used. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-9-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: fix double freeJérôme Pouiller
In case of error in wfx_probe(), wdev->hw is freed. Since an error occurred, wfx_free_common() is called, then wdev->hw is freed again. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Reviewed-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Fixes: 4033714d6cbe ("staging: wfx: fix init/remove vs IRQ race") Link: https://lore.kernel.org/r/20200505123757.39506-4-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-05-13staging: wfx: reduce timeout for chip initial start upJérôme Pouiller
The device take a few hundreds of milliseconds to start. However, the current code wait up to 10 second for the chip. We can safely reduce this value to 1 second. Thanks to that change, it is no more necessary to use an interruptible timeout. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200505123757.39506-3-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28staging: wfx: fix highest Rx value declared in ieee80211_supported_bandJérôme Pouiller
The highest Rx value declared in ieee80211_supported_band had two problems: 1. The value should be little endian 2. ShortGI was not taken into account. So value should be 72 instead of 65. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200427134031.323403-9-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-28staging: wfx: add support for 'device too hot' indicationJérôme Pouiller
Device is able to detect a high temperature. In this case, the traffic is not allowed to be sent until the temperature decrease. This patch detects the warnings raised by the device and stop the traffic accordingly. It also add a delayed task as safeguard in case the chip would never send the indication that the temperature decrease. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200427134031.323403-7-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-23staging: wfx: introduce wfx_set_default_unicast_key()Jérôme Pouiller
Currently code handle WEP keys manually. It is far easier to use the set_default_unicast_key() callback provided by mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200420160311.57323-11-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-16staging: wfx: do not wait for a dtim before associateJérôme Pouiller
The only reason we ask to mac80211 to wait for a dtim before to associate is to get an accurate DTIM value. However, we can temporary set the dtim period to 1. Then we can waiting for BSS_CHANGED_BEACON_INFO for the real value. Thus, the association process is faster. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200415161147.69738-7-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-13staging: wfx: introduce wfx_join_ibss() and wfx_leave_ibss()Jérôme Pouiller
Currently, IBSS networks are started by the mean of wfx_bss_info_changed(). It easier to use use callbacks provided by mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200410133239.438347-16-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-13staging: wfx: implement start_ap/stop_apJérôme Pouiller
Currently, wfx_bss_info_changed() check interface status changes and guess when the pattern match with an AP start and AP stop (through wfx_update_beaconing()). It is far easier to rely on start_ap and stop_ap callbacks provided by mac80211. wfx_bss_info_changed() keeps only the responsibility of updating the frame templates. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200410133239.438347-5-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-13staging: wfx: relocate LINK_ID_NO_ASSOC and MAX_STA_IN_AP_MODE to hif APIJérôme Pouiller
The definitions LINK_ID_NO_ASSOC and MAX_STA_IN_AP_MODE are imposed by the hardware. Therefore, they should be located in the hardware interface API. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200406111756.154086-3-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-13staging: wfx: repair wfx_flush()Jérôme Pouiller
Until now, wfx_flush() flushed queue for while device instead of only the queue of the intended vif. It sometime failed with a timeout, but this error was not reported. Moreover, if the device was frozen, wfx_flush didn't do anything and it results a potential warning (and maybe a resource leak) when the frozen device was unregistered. We can also notice that wfx_tx_queues_wait_empty_vif() did only exist to work around the broken feature of wfx_flush(). This patch repair wfx_flush() and therefore drop wfx_tx_queues_wait_empty_vif(). Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200401110405.80282-29-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-04-13staging: wfx: drop useless sta_asleep_maskJérôme Pouiller
Currently, the driver tracks power save state of the stations with the variable sta_asleep_mask. Then, it takes care to not sent data to asleep stations. However, this work is already done by mac80211. Normally, there are no frames for asleep stations in our queues. So, driver do not have to filter frames in its queues (apart the frames marked "AFTER_DTIM"). Notice that there is a risk of race between state of the station and data send to the firmware. However, this risk is limited since the number of frame in queues are small. In add, this race also exists with the current code. Anyway, the firmware is able to detect the problem and driver will receive a 'REQUEUE' status (translated in TX_STAT_TX_FILTERED for mac80211). Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200401110405.80282-13-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11staging: wfx: use sleeping gpio accessorsMichał Mirosław
Driver calls GPIO get/set only from non-atomic context and so can use any GPIOs. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Link: https://lore.kernel.org/r/cb19e7c521712d5a166e0b7e9cac4450798fdce0.1581416843.git.mirq-linux@rere.qmqm.pl Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-02-11staging: wfx: fix init/remove vs IRQ raceMichał Mirosław
Current code races in init/exit with interrupt handlers. This is noticed by the warning below. Fix it by using devres for ordering allocations and IRQ de/registration. WARNING: CPU: 0 PID: 827 at drivers/staging/wfx/bus_spi.c:142 wfx_spi_irq_handler+0x5c/0x64 [wfx] race condition in driver init/deinit Cc: stable@vger.kernel.org Fixes: 0096214a59a7 ("staging: wfx: add support for I/O access") Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/f0c66cbb3110c2736cd4357c753fba8c14ee3aee.1581416843.git.mirq-linux@rere.qmqm.pl Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-16staging: wfx: update power-save per interfaceJérôme Pouiller
mac80211 and the device are both able to control power-save per vif. But, the current code retrieve power-save from wfx_config(). So, it does not allow to setup power-save independently for each vif. Driver just has to rely on wfx_bss_info_changed() instead of wfx_config(). wfx_config() has nothing to do anymore, but we keep it since it is mandatory for mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200115135338.14374-41-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-16staging: wfx: add missing PROBE_RESP_OFFLOAD featureJérôme Pouiller
Some userspace tools (hostapd) rely on probe_resp_offload fields for certain features. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20200115135338.14374-4-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-18staging: wfx: implement cancel_hw_scan()Jérôme Pouiller
The device provides an API to abort a scan request. Expose this feature to mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-55-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-18staging: wfx: take advantage of IS_ERR_OR_NULL()Jérôme Pouiller
Obviously, current code can be replaced by IS_ERR_OR_NULL(). Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-16-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-12-18staging: wfx: firmware does not support more than 32 total retriesJérôme Pouiller
The sum of all retries for a Tx frame cannot be superior to 32. There are 4 rates at most. So this patch limits number of retries per rate to 8. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191217161318.31402-6-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-14staging: align to fix warnings of line over 80 charactersJules Irenge
Align to fix multiple warnings of line over 80 characters. Issue detected by checkpatch tool. Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Link: https://lore.kernel.org/r/20191113110052.14855-1-jbi.octave@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-26staging: wfx: fix setting MAC address from DTJérôme Pouiller
MAC address read from chip is unconditionally used even if a MAC address is configured in device tree. Reported-by: Marc Dorval <marc.dorval@silabs.com> Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191017093954.657-5-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-26staging: wfx: fix Oops when CONFIG_OF_NET is not setJérôme Pouiller
In most case, of_get_mac_address() return NULL in case of error. However, if CONFIG_OF_NET is not set, it return -ENODEV. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191017093954.657-4-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-26staging: wfx: relocate wfx_fill_sl_key() in secure_link.hJérôme Pouiller
"Secure link" feature is not available in in-tree driver (because it depends on mbedtls). Thus, secure_link.h only empty functions. Module parameter "slk_key" and associated function wfx_fill_sl_key() had an unjustifiable place in main.c. This patch relocate them to secure_link.h. BTW, content of wfx_fill_sl_key() is now useless. Just keep a warning if user try to use "slk_key" attribute (unsupported by this driver). Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191017093954.657-2-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-26staging: wfx: drop module versionJérôme Pouiller
wfx_version.h says that this code is same same than driver 2.3.1 hosted on github: https://github.com/siliconlabs/wfx-linux-driver/tree/2.3.1-public However, it is inaccurate, driver in-tree contains multiple small patches ahead 2.3.1. I prefer to drop this confusing information. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20191017093954.657-1-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-08staging: wfx: fix spelling mistake "hexdecimal" -> "hexadecimal"Colin Ian King
There is a spelling mistake in the documentation and a module parameter description. Fix these. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20191008082205.19740-1-colin.king@canonical.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: implement the rest of mac80211 APIJérôme Pouiller
Finish to fill struct ieee80211_ops with necessary callbacks. Driver is now ready to be registered to mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-21-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: implement 802.11 key handlingJérôme Pouiller
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>
2019-10-04staging: wfx: allow to scan networksJérôme Pouiller
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>
2019-10-04staging: wfx: allow to send 802.11 framesJérôme Pouiller
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>
2019-10-04staging: wfx: add debug files and trace debug eventsJérôme Pouiller
Add traces when debug events happen and allow to ask internal information to chip. These features work independently from mac80211. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-16-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: setup initial chip configurationJérôme Pouiller
A few tasks remain to be done in order to finish chip initial configuration: - configure chip to use multi-tx confirmation (speed up data transfer) - configure chip to use wake-up feature (save power consumption during runtime) - set hardware configuration (clocks, RF, pinout, etc...) using a Platform Data Set (PDS) file On release, driver completely shutdown the chip to save power consumption. Documentation about PDS and PDS data for sample boards are available here[1]. One day, PDS data may find a place in device tree but, currently, PDS is too much linked with firmware to allowing that. This patch also add "send_pds" file in debugfs to be able to dynamically change PDS (only for debug, of course). [1]: https://github.com/SiliconLabs/wfx-firmware/tree/master/PDS Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-15-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: introduce "secure link"Jérôme Pouiller
Chip support encryption of the link between host and chip. This feature is called "secure link". Driver code on github[1] support it. However, it relies on mbedtls for cryptographic functions. So, I decided to not import this feature in current patch. However, in order to keep code synchronized between github and kernel, I imported all code related to this feature, even if most of it is just no-op. [1]: https://github.com/SiliconLabs/wfx-linux-driver/ Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-14-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: allow to send commands to chipJérôme Pouiller
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>
2019-10-04staging: wfx: instantiate mac80211 dataJérôme Pouiller
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>
2019-10-04staging: wfx: add support for start-up indicationJérôme Pouiller
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>
2019-10-04staging: wfx: add IRQ handlingJérôme Pouiller
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>
2019-10-04staging: wfx: load firmwareJérôme Pouiller
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>
2019-10-04staging: wfx: add support for I/O accessJérôme Pouiller
Introduce bus level communication layer. At this level, 7 registers can be addressed. Notice that SPI driver is able to manage chip reset. SDIO mode relies on an external driver (`mmc-pwrseq`) to reset chip. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20190919142527.31797-3-Jerome.Pouiller@silabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-10-04staging: wfx: add infrastructure for new driverJérôme Pouiller
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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