diff options
| author | Kinsey Moore <kinsey.moore@oarcorp.com> | 2021-07-09 09:47:34 -0500 |
|---|---|---|
| committer | Joel Sherrill <joel@rtems.org> | 2021-07-15 10:07:16 -0500 |
| commit | 14576608a9477d7a29150a9ba8e73b32ecea9de4 (patch) | |
| tree | 2f6580c10bc23da61cc65011d67dcebb65801635 | |
| parent | rtemsbsd: Use config.inc to control ZynqMP ethernet (diff) | |
| download | rtems-libbsd-14576608a9477d7a29150a9ba8e73b32ecea9de4.tar.bz2 | |
freebsd/if_cgem: Fail probe for unterminated MII
When the MII bus is unterminated on unused interfaces, it results in PHY
read timeouts which manifest as spurious PHYs during the attach call.
Detect these timeouts during the probe so the device can be ignored.
| -rw-r--r-- | freebsd/sys/dev/cadence/if_cgem.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/freebsd/sys/dev/cadence/if_cgem.c b/freebsd/sys/dev/cadence/if_cgem.c index 34df7ac7..3eaaf6b2 100644 --- a/freebsd/sys/dev/cadence/if_cgem.c +++ b/freebsd/sys/dev/cadence/if_cgem.c @@ -1953,6 +1953,25 @@ cgem_probe(device_t dev) if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) return (ENXIO); +#else /* __rtems__ */ + + struct cgem_softc *sc = device_get_softc(dev); + int val, rid = 0; + + /* Check for PHY read timeouts which indicate an unterminated MII bus */ + sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, + RF_ACTIVE); + + val = cgem_miibus_readreg(dev, 0, MII_BMSR); + if (val == -1) { + bus_release_resource(dev, SYS_RES_MEMORY, &rid, + sc->mem_res); + sc->mem_res = NULL; + return (ENXIO); + } + bus_release_resource(dev, SYS_RES_MEMORY, &rid, + sc->mem_res); + sc->mem_res = NULL; #endif /* __rtems__ */ device_set_desc(dev, "Cadence CGEM Gigabit Ethernet Interface"); |