On May 8, 2011, at 9:58 AM, Adrian Chadd wrote: > On 8 May 2011 01:22, Damjan Marion <damjan.mar...@gmail.com> wrote: > >> I would like to implement support for embedded switch on WRT350Nv2 router >> which is based on 88F5181L SoC (ARM). FreeBSD already have support for >> embedded gigabit card (if_mge) but in case if this router MAC is connected >> directly to 8-port ethernet chip (88E6131). If I use MII_PHY_ANY scan founds >> following PHYs on miibus: > > There's been some discussions in the past about how to implement a > switch PHY API for use by the variety of embedded switch devices out > there. > > There's been a few attempts at it too. > > What I think may just be a good first step is to port over the Linux > driver for it and instead of trying to make it appear as a multi-PHY > device, just export a programming and status interface via sysctl. > That at least gets the thing in the tree and functioning. Once we have > a few devices in the tree and functioning, we'll be in a better > position to have a discussion about how to represent it. > > There's a couple of dissenting views about how it should be > implemented. I'd like to see some working code in the tree so some > discussion can occur, rather than lots of dissent and no discussion. > :) > > (The switch phy is the last remaining bit of the board support for a > handful of boards too, so I'd really like to see it completed. :)
Hi Adrian, I agree with your approach. At this point my concern is how to change existing code to support switch PHY. In my case problem is that mii_attach as it is today cannot be used detect this device as device is not using standard registers. I can see 2 possible options: 1. Modifying eth driver in the way that if switch phy is detected then it avoids calling mii_attach. Drawback of this approach is that it will need applying same code for each pair of MAC-switch PHY 2. Modifying mii_attach in the way that it is more flexible in detecting such devices. This looks challenging to me to do this in flexible way. What do you think? Damjan_______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
