Date: Thu, 4 Dec 2008 20:32:53 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r185620 - head/sys/dev/cxgb/common Message-ID: <200812042032.mB4KWrBG033880@svn.freebsd.org>
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Author: gnn Date: Thu Dec 4 20:32:53 2008 New Revision: 185620 URL: http://svn.freebsd.org/changeset/base/185620 Log: Fix a bug with the ael1006 PHY. The bug shows up as persistent but incomplete packet loss, of between 10-30%. The fix is to put the PHY into and take it out of local loopback mode when resetting the interface. Obtained from: Chelsio Inc. MFC after: 3 days Modified: head/sys/dev/cxgb/common/cxgb_ael1002.c Modified: head/sys/dev/cxgb/common/cxgb_ael1002.c ============================================================================== --- head/sys/dev/cxgb/common/cxgb_ael1002.c Thu Dec 4 20:04:25 2008 (r185619) +++ head/sys/dev/cxgb/common/cxgb_ael1002.c Thu Dec 4 20:32:53 2008 (r185620) @@ -205,6 +205,16 @@ static int ael1006_reset(struct cphy *ph t3_write_reg(phy->adapter, A_T3DBG_GPIO_EN, gpio_out); msleep(125); t3_phy_reset(phy, MDIO_DEV_PMA_PMD, wait); + + /* Phy loopback work around for ael1006 */ + /* Soft reset phy by toggling loopback */ + msleep(125); + /* Put phy into local loopback */ + t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 0, 1); + msleep(125); + /* Take phy out of local loopback */ + t3_mdio_change_bits(phy, MDIO_DEV_PMA_PMD, MII_BMCR, 1, 0); + return 0; }
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