Christian Lamparter <chunkeey@xxxxxxxxx> wrote: > Atheros cards with a AR92XX generation (and older) chip usually > store their pci(e) initialization vectors on an external eeprom chip. > However these chips technically don't need the eeprom chip attached, > the AR9280 Datasheet in section "6.1.2 DEVICE_ID" describes that > "... if the EEPROM content is not valid, a value of 0xFF1C returns > when read from the register". So, they will show up on the system's > pci bus. However in that state, ath9k can't load, since it relies > on having the correct pci-id, otherwise it doesn't know what chip it > actually is. This happens on many embedded devices like routers > and accesspoint since they want to keep the BOM low and store the > pci(e) initialization vectors together with the calibration data > on the system's FLASH, which is out of reach of the ath9k chip. > > Furthermore, Some devices (like the Cisco Meraki Z1 Cloud Managed > Teleworker Gateway) need to be able to initialize the PCIe wifi device. > Normally, this should be done as a pci quirk during the early stages of > booting linux. However, this isn't possible for devices which have the > init code for the Atheros chip stored on NAND in an UBI volume. > Hence, this module can be used to initialize the chip when the > user-space is ready to extract the init code. > > Martin Blumenstingl prodived the following fixes: > owl-loader: add support for OWL emulation PCI devices > owl-loader: don't re-scan the bus when ath9k_pci_fixup failed > owl-loader: use dev_* instead of pr_* logging functions > owl-loader: auto-generate the eeprom filename as fallback > owl-loader: add a debug message when swapping the eeprom data > owl-loader: add missing newlines in log messages > > Reviewed-by: Julian Calaby <julian.calaby@xxxxxxxxx> > Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx> > Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> > Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> Patch applied to ath-next branch of ath.git, thanks. 5a4f2040fd07 ath9k: add loader for AR92XX (and older) pci(e) -- https://patchwork.kernel.org/patch/11033133/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
