From: John Crispin Date: Mon, 5 Oct 2015 10:26:34 +0000 (+0000) Subject: ramips: Enable rx of 1536 bytes ethernet frames on MT7621 X-Git-Tag: reboot~1867 X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=commitdiff_plain;h=aecac14cc42d2759822cb8da477ef18288342e87 ramips: Enable rx of 1536 bytes ethernet frames on MT7621 The default switch frame size (with FCS + header) is 1536 bytes. But the GMAC only accepted frames up to 1522 bytes. Setting it to 1536 allows to receive ethernet frames using the full of MTU 1500 + an extra VLAN header + VLAN header added by the switch. Signed-off-by: Sven Eckelmann SVN-Revision: 47117 --- diff --git a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c index 803970487a..325e2433f1 100644 --- a/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c +++ b/target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c @@ -602,12 +602,12 @@ static void gsw_hw_init_mt7621(struct mt7620_gsw *gsw, struct device_node *np) udelay(10); if ((rt_sysc_r32(SYSC_REG_CHIP_REV_ID) & 0xFFFF) == 0x0101) { - /* (GE1, Force 1000M/FD, FC ON) */ - gsw_w32(gsw, 0x2005e30b, 0x100); + /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */ + gsw_w32(gsw, 0x2105e30b, 0x100); mt7530_mdio_w32(gsw, 0x3600, 0x5e30b); } else { - /* (GE1, Force 1000M/FD, FC ON) */ - gsw_w32(gsw, 0x2005e33b, 0x100); + /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */ + gsw_w32(gsw, 0x2105e33b, 0x100); mt7530_mdio_w32(gsw, 0x3600, 0x5e33b); }