On 08/13/2014 03:19 AM, [email protected] wrote: > From: Shaohui Xie <[email protected]> > > XFI is supported on T4QDS-XFI board, which removed slot3, and four LANEs > of serdes2 are routed to a SFP+ cages, which to house fiber cable or > direct attach cable(copper), the copper cable is used to emulate the > 10GBASE-KR scenario. > > So, for XFI usage, there are two scenarios, one will use fiber cable, > another will use copper cable. For fiber cable, there is NO PHY, while > for copper cable, we need to use internal PHY which exist in Serdes to > do auto-negotiation and link training, which implemented in kernel. > We use hwconfig to define cable type for XFI, and fixup dtb based on the > cable type. > > For copper cable, set below env in hwconfig: > > fsl_10gkr_copper:<10g_mac_name> > > the <10g_mac_name> can be fm1_10g1, fm1_10g2, fm2_10g1, fm2_10g2. The > four <10g_mac_name>s do not have to be coexist in hwconfig. For XFI ports, > if a given 10G port will use the copper cable for 10GBASE-KR, set the > <10g_mac_name> of the port in hwconfig, otherwise, fiber cable will be > assumed to be used for the port. > > For ex. if four XFI ports will both use copper cable, the hwconfig > should contain: > > fsl_10gkr_copper:fm1_10g1,fm1_10g2,fm2_10g1,fm2_10g2 > > For fiber cable: > > 1. give PHY address to a XFI port, otherwise, the XFI ports will not be > available in U-boot, there is no PHY physically for XFI when using fiber > cable, this is just to make U-boot happy and we can use the XFI ports > in U-boot. > 2. fixup dtb to use fixed-link in case of fiber cable which has no PHY. > Kernel requests that a MAC must have a PHY or fixed-link. > > When using XFI protocol, the MAC 9/10 on FM1 should init as 10G interface. > > Change serdes 2 protocol 56 to 55 which has same feature as 56 since 56 > is not valid any longer. > > Signed-off-by: Shaohui Xie <[email protected]> > --- > changes for V2: > added XFI information in README.t4240qds > Applied to u-boot-mpc85xx master branch, awaiting for upstream.
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