if_wm: support for INTEL 82571EB_SERDES

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

Hi -
I got a board with such a chip. There is practically
no PHY, no autonegoiation etc. Data are transferred
on a backplane.

The appended patch makes it work. It is obviously quite
destructive -- just to show where changes are needed.
I could turn that into its own set of
mediainit/change/check functions. Just don't want to
step onto any maintainer's toes.
So does anyone care?

Another question is what if_media.h mediatype to use.
Technically it is 1000base-bx (sometimes called -kx).
There is already a -cx, the only difference is the
impedance (which is 100ohm). Using cx is wrong, adding
a new one doesn't make sense because the driver can't
tell the difference anyway... It's about the same as
with singlemode/multimode fiber, there is just too much
nonsense in that header.

best regards
Matthias



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Forschungszentrum Juelich GmbH
52425 Juelich
Sitz der Gesellschaft: Juelich
Eingetragen im Handelsregister des Amtsgerichts Dueren Nr. HR B 3498
Vorsitzende des Aufsichtsrats: MinDir'in Baerbel Brumme-Bothe
Geschaeftsfuehrung: Prof. Dr. Achim Bachem (Vorsitzender),
Dr. Ulrich Krafft (stellv. Vorsitzender), Prof. Dr.-Ing. Harald Bolt,
Prof. Dr. Sebastian M. Schmidt
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#
# old_revision [f26d78c2f8c3d2f0faa3f845e9a3989ae374c191]
#
# patch "sys/dev/pci/if_wm.c"
#  from [a637541a1fb46ecbc30d7fcbb320a59977cada16]
#    to [abe1b8d958558ac3e0ce5210fa7e936a37d5ed4f]
#
============================================================
--- sys/dev/pci/if_wm.c a637541a1fb46ecbc30d7fcbb320a59977cada16
+++ sys/dev/pci/if_wm.c abe1b8d958558ac3e0ce5210fa7e936a37d5ed4f
@@ -613,6 +613,7 @@ static const struct wm_product {
        int                     wmp_flags;
 #define        WMP_F_1000X             0x01
 #define        WMP_F_1000T             0x02
+#define WMP_F_SERDES           0x04
 } wm_products[] = {
        { PCI_VENDOR_INTEL,     PCI_PRODUCT_INTEL_82542,
          "Intel i82542 1000BASE-X Ethernet",
@@ -765,7 +766,7 @@ static const struct wm_product {
        { PCI_VENDOR_INTEL,     PCI_PRODUCT_INTEL_82571EB_FIBER,
          "Intel PRO/1000 PF (82571EB)",
          WM_T_82571,           WMP_F_1000X },
-#if 0
+#if 1
        { PCI_VENDOR_INTEL,     PCI_PRODUCT_INTEL_82571EB_SERDES,
          "Intel PRO/1000 PB (82571EB)",
          WM_T_82571,           WMP_F_SERDES },
@@ -4188,6 +4189,7 @@ wm_tbi_mediainit(struct wm_softc *sc)
         */
        sc->sc_ctrl |= CTRL_SWDPIO(0);
        sc->sc_ctrl &= ~CTRL_SWDPIO(1);
+       sc->sc_ctrl &= ~CTRL_LRST;
 
        CSR_WRITE(sc, WMREG_CTRL, sc->sc_ctrl);
 
@@ -4248,6 +4250,7 @@ wm_tbi_mediachange(struct ifnet *ifp)
 static int
 wm_tbi_mediachange(struct ifnet *ifp)
 {
+#if 0
        struct wm_softc *sc = ifp->if_softc;
        struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
        uint32_t status;
@@ -4354,7 +4357,7 @@ wm_tbi_mediachange(struct ifnet *ifp)
        }
 
        wm_tbi_set_linkled(sc);
-
+#endif
        return (0);
 }
 
@@ -4390,6 +4393,9 @@ wm_tbi_check_link(struct wm_softc *sc)
        struct ifmedia_entry *ife = sc->sc_mii.mii_media.ifm_cur;
        uint32_t rxcw, ctrl, status;
 
+       sc->sc_tbi_linkup = 1;
+       return;
+
        status = CSR_READ(sc, WMREG_STATUS);
 
        rxcw = CSR_READ(sc, WMREG_RXCW);
@@ -5639,6 +5645,9 @@ wm_check_for_link(struct wm_softc *sc)
        uint32_t status;
        uint32_t sig;
 
+       sc->sc_tbi_linkup = 1;
+       return 0;
+
        rxcw = CSR_READ(sc, WMREG_RXCW);
        ctrl = CSR_READ(sc, WMREG_CTRL);
        status = CSR_READ(sc, WMREG_STATUS);