diff options
| author | sam <sam@FreeBSD.org> | 2003-08-19 16:57:00 +0000 |
|---|---|---|
| committer | sam <sam@FreeBSD.org> | 2003-08-19 16:57:00 +0000 |
| commit | f8075fb80bc69f6f88970b9a22bf64710b8f5be1 (patch) | |
| tree | bed693238aa6c23cf5aa392c3da94dba48b859b8 /sys/pci | |
| parent | 923b177486d23c3a3252d45a3ac8a413bad664c3 (diff) | |
| download | FreeBSD-src-f8075fb80bc69f6f88970b9a22bf64710b8f5be1.zip FreeBSD-src-f8075fb80bc69f6f88970b9a22bf64710b8f5be1.tar.gz | |
"short cable" fix for DP8315
Derived from: netbsd and tech note at soekris web site
MFC after: 1 week
Diffstat (limited to 'sys/pci')
| -rw-r--r-- | sys/pci/if_sis.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sys/pci/if_sis.c b/sys/pci/if_sis.c index 204e2a5..9f3cf71 100644 --- a/sys/pci/if_sis.c +++ b/sys/pci/if_sis.c @@ -2146,6 +2146,29 @@ sis_init(xsc) SIS_CLRBIT(sc, SIS_RX_CFG, SIS_RXCFG_RX_TXPKTS); } + if (sc->sis_type == SIS_TYPE_83815 && + IFM_SUBTYPE(mii->mii_media_active) == IFM_100_TX) { + uint32_t reg; + + /* + * Some DP83815s experience problems when used with short + * (< 30m/100ft) Ethernet cables in 100BaseTX mode. This + * sequence adjusts the DSP's signal attenuation to fix the + * problem. + */ + CSR_WRITE_4(sc, NS_PHY_PAGE, 0x0001); + + reg = CSR_READ_4(sc, NS_PHY_DSPCFG); + CSR_WRITE_4(sc, NS_PHY_DSPCFG, (reg & 0xfff) | 0x1000); + DELAY(100); + reg = CSR_READ_4(sc, NS_PHY_TDATA); + if ((reg & 0x0080) == 0 || (reg & 0xff) >= 0xd8) { + CSR_WRITE_4(sc, NS_PHY_TDATA, 0x00e8); + SIS_SETBIT(sc, NS_PHY_DSPCFG, 0x20); + } + CSR_WRITE_4(sc, NS_PHY_PAGE, 0); + } + /* * Enable interrupts. */ |
