> > > > Instead, it looks like what you need, is a way to keep track of > > > > whether the SDIO card, became power cycled or if it stayed powered > on, > > > > when "ifconfig wlan0 up" is done. In case of a power cycle, you need > > > > to re-program the firmware, right? > > > > > > Yeah mostly. But we also need to ensure things do get powered down > > > properly after ifconfig wlan0 down :) IMO after ifconfig wlan0 down > > > returns, there should be no waiting needed. > > > > > > > Would it be possible to re-program the firmware, even if the SDIO card > > > > stayed powered-on? > > > > > > That might help for some cases, but the problem of how to ensure the > > > card is powered down after ifconfig wlan0 down returns still exists. > > > > Well, does the SDIO card really have to be powered down before > > "ifconfig wlan0 down" returns? If so, why? > > Good question. Eyal, any comments what should happen here from > the wlcore hardware point of view? > You are ok as long as the wlan_enable pin Does go down for a sufficient amount of time turning the wl18xx device off. The firmware can only be downloaded once after power on. In between down/up you have to make sure the wlan_enable is fully going through on->off->on and the wl18xx device is fully reset. On power on the firmware is loaded by the driver and this will fail in case the reset didn't happen . > > An option would be to call pm_runtime_get_sync() at "ifconfig wlan0 > > up" (I assume you already do that) and then re-program the firmware, > > even if the card hasn't been power cycled. Wouldn't that work? > No, this wouldn't work in case the wlan_enable pin didn't reset the chip as part of the "ifconfig wlan0 down" Command. > Ricardo, care to test and see if the problem comes back if you > keep PM runtime enabled? > > > Or perhaps this is the problem you are encountering, that the FW can't > > be reprogrammed, unless the card has been power cycled? You can easily > > test that, by simply bumping the runtime usage count for the card > > device via sysfs, before doing the "ifconfig wlan0 up/down" thingy. > Correct. The firmware can't be reprogrammed , unless the card has been power cycled. > Ricardo, care to play with this too? > Best Regards, Eyal
