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Announce flow control capability to underlying PHY driver.

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Pause timer value is initialized to 0xFFFF. Controller allows just
4 different TX pause thresholds. The lowest possible threshold
value looks too aggressive so use next available threshold value.
This commit is contained in:
yongari 2011-11-22 20:57:06 +00:00
parent 96623b87d9
commit 2a52428fd6
1 changed files with 11 additions and 4 deletions
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15
sys/dev/vge/if_vge.c
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@ -1103,7 +1103,7 @@ vge_attach(device_t dev)
/* Do MII setup */
error = mii_attach(dev, &sc->vge_miibus, ifp, vge_ifmedia_upd,
vge_ifmedia_sts, BMSR_DEFCAPMASK, sc->vge_phyaddr, MII_OFFSET_ANY,
0);
MIIF_DOPAUSE);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
@ -2112,9 +2112,16 @@ vge_init_locked(struct vge_softc *sc)
vge_rxfilter(sc);
vge_setvlan(sc);
/* Enable flow control */
CSR_WRITE_1(sc, VGE_CRS2, 0x8B);
/* Initialize pause timer. */
CSR_WRITE_2(sc, VGE_TX_PAUSE_TIMER, 0xFFFF);
/*
* Initialize flow control parameters.
* TX XON high threshold : 48
* TX pause low threshold : 24
* Disable hald-duplex flow control
*/
CSR_WRITE_1(sc, VGE_CRC2, 0xFF);
CSR_WRITE_1(sc, VGE_CRS2, VGE_CR2_XON_ENABLE | 0x0B);
/* Enable jumbo frame reception (if desired) */