[yocto] How to add support for "usb WIFI dongle"?

[Jerry Lian]

How can we tell whether "ipw2x00" is driver or firmware?
* I check wiki:
https://en.wikipedia.org/wiki/Comparison_of_open-source_wireless_drivers
* It seems that "ipw2x00" IS a driver, right?

* (And logically, we should not be required to select firmware, right?)
* (I mean: logically, if we select the driver, yocoto should select
corresponding firmware automatically for us, right?)

Thanks!






On Tue, Nov 28, 2017 at 1:18 PM, Alan Martinovic <alan.martinovic at senic.com>
wrote:

> I can't confirm, but it just might be that "ipw2x00" is actually a
> firmware.
> (Haven't seen a firware specified explicetly in the menu config before).
>
> Ref: https://wiki.debian.org/brcm80211
>
> I recently had a question that might share some light on the firmware
> - driver relation:
>  (given that it really is firmware you check in the menuconfig)
>
> https://electronics.stackexchange.com/questions/
> 342118/design-decision-for-dynamic-firmware-loading
>
>
> On Tue, Nov 28, 2017 at 4:00 PM, Jerry Lian <jerry.lian at gmail.com> wrote:
> > Thanks Alan, I follow your instruction and it works eventually!
> >
> > But I got another question:
> >
> > I am using official Raspberry-PI WIFI dongle (BCM43143)
> > I configure kernel so that driver "brcm80211" is enabled, however, WIFI
> is
> > not working.
> > Then I add driver "ipw2x00", then WIFI works.
> > So my question, why do we need both "ipw2x00" and "brcm80211" for
> official
> > Raspberry-PI WIFI dongle?
> > (Sometimes the WIFI dongle works if I add drivers: "brcm80211, iwlwifi,
> > rt2x00", without "ipw2x00", so I am really confused!)
> >
> > Thanks!
> >
> >
> >
> >
> >
> >
> >
> > On Tue, Nov 21, 2017 at 12:04 PM, Alan Martinovic
> > <alan.martinovic at senic.com> wrote:
> >>
> >> Some hints on where to start at:
> >>
> >> > What should I do to add support for "usb WIFI dongle"
> >>
> >> Am guessing the dongle works with Raspbian or id gets detected
> >> once you plug it into a desktop Linux machine.
> >> Once you do that type:
> >>
> >>     dmesg
> >>
> >> And it will list the kernel modules related to your dongle.
> >> You can use those buzzwords to google for what does
> >> enabling the dongle actually translates to in terms of kernel config.
> >>
> >> After that (depending what linux you're using) figure out how to
> >> run menuconfig. It might be something like:
> >>
> >>     bitbake your-kernel-package-name -c menuconfig
> >>
> >> and try checking out the boxes that you found out
> >> might be relevant to your wifi dongle.
> >> Save it, build the image, and see if it got you somewhere.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Tue, Nov 21, 2017 at 5:32 PM, Jerry Lian <jerry.lian at gmail.com>
> wrote:
> >> > I am confused on adding support for "usb WIFI dongle":
> >> > * My boards do NOT have WIFI capability, so I will add a "usb WIFI
> >> > dongle".
> >> >   (I have two boards: Raspberri-PI-2, SIMATIC IOT-2020)
> >> > * Suppose we start from "core-image-sato"
> >> > * What should I do to add support for "usb WIFI dongle"
> >> > * After we build/boot the image, how can we verify and bring the WIFI
> >> > up?
> >> >
> >> > Thanks!
> >> > Jerry
> >> >
> >> > --
> >> > _______________________________________________
> >> > yocto mailing list
> >> > yocto at yoctoproject.org
> >> > https://lists.yoctoproject.org/listinfo/yocto
> >> >
> >
> >
>
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