diff options
| author | Jeff Garzik <jgarzik@rum.normnet.org> | 2002-02-08 08:27:49 -0500 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@rum.normnet.org> | 2002-02-08 08:27:49 -0500 |
| commit | 786ceeafd316d60da2cd02c3531feae88f88b23d (patch) | |
| tree | 0f65a5f48c3b8cdc5f0ccba039ed39827d30a8f1 | |
| parent | 4dae3030779696859b449262488b8e24b72c1c18 (diff) | |
Add config option to enable natsemi net driver hardware bug workaround.
"some" systems with "some" cables see a large amount of errors,
due to a hardware bug. This bug is (apparently) not probe-able;
however it only appears on rare reference boards and the like,
so we simply add a config option and default the option to OFF.
Further detail:
When CONFIG_NATSEMI_CABLE_MAGIC option is enabled, PMDCSR_VAL
register value becomes 0x1898, a value provided by a NatSemi
app note. This enables a workaround for a hardware bug
which is (apparently) not probe-able. Luckily the hardware bug
is (apparently) not common either, so we default to disabling
this workaround.
Contributor: Tim Hockin
| -rw-r--r-- | drivers/net/Config.help | 11 | ||||
| -rw-r--r-- | drivers/net/Config.in | 3 | ||||
| -rw-r--r-- | drivers/net/natsemi.c | 4 |
3 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/Config.help b/drivers/net/Config.help index d34d5ca4569f..fe7ba7ec616a 100644 --- a/drivers/net/Config.help +++ b/drivers/net/Config.help @@ -1154,6 +1154,17 @@ CONFIG_NATSEMI More specific information and updates are available from <http://www.scyld.com/network/natsemi.html>. +CONFIG_NATSEMI_CABLE_MAGIC + Some systems see lots of errors with NatSemi ethernet controllers + on certain cables. If you are seeing lots of errors, try turning + this option on. Some boards have incorrect values for supporting + resistors that can cause this change to break. If you turn this + option on and your network suddenly stops working, turn this + option off. + + Say N unless you are certain you need this option. + Vendors should not enable this option by default. + CONFIG_SK_G16 If you have a network (Ethernet) card of this type, say Y and read the Ethernet-HOWTO, available from diff --git a/drivers/net/Config.in b/drivers/net/Config.in index 818dabe64263..8e0c833cad1e 100644 --- a/drivers/net/Config.in +++ b/drivers/net/Config.in @@ -171,6 +171,9 @@ if [ "$CONFIG_NET_ETHERNET" = "y" ]; then dep_tristate ' Mylex EISA LNE390A/B support (EXPERIMENTAL)' CONFIG_LNE390 $CONFIG_EISA $CONFIG_EXPERIMENTAL dep_tristate ' Myson MTD-8xx PCI Ethernet support' CONFIG_FEALNX $CONFIG_PCI dep_tristate ' National Semiconductor DP8381x series PCI Ethernet support' CONFIG_NATSEMI $CONFIG_PCI + if [ "$CONFIG_NATSEMI" = "y" -o "$CONFIG_NATSEMI" = "m" ]; then + bool ' NatSemi workaround for high errors' CONFIG_NATSEMI_CABLE_MAGIC + fi dep_tristate ' PCI NE2000 and clones support (see help)' CONFIG_NE2K_PCI $CONFIG_PCI dep_tristate ' Novell/Eagle/Microdyne NE3210 EISA support (EXPERIMENTAL)' CONFIG_NE3210 $CONFIG_EISA $CONFIG_EXPERIMENTAL dep_tristate ' Racal-Interlan EISA ES3210 support (EXPERIMENTAL)' CONFIG_ES3210 $CONFIG_EISA $CONFIG_EXPERIMENTAL diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c index a94d694536b6..15a766522949 100644 --- a/drivers/net/natsemi.c +++ b/drivers/net/natsemi.c @@ -394,7 +394,11 @@ enum register_offsets { SDCFG = 0xF8 }; /* the values for the 'magic' registers above (PGSEL=1) */ +#ifdef CONFIG_NATSEMI_CABLE_MAGIC +#define PMDCSR_VAL 0x1898 +#else #define PMDCSR_VAL 0x189C +#endif #define TSTDAT_VAL 0x0 #define DSPCFG_VAL 0x5040 #define SDCFG_VAL 0x008c |