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ramips: Enable rx of 1536 bytes ethernet frames on MT7621

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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 <sven@open-mesh.com>

SVN-Revision: 47117
This commit is contained in:
John Crispin 2015-10-05 10:26:34 +00:00
parent 7b306e3eb3
commit aecac14cc4
1 changed files with 4 additions and 4 deletions
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8
target/linux/ramips/files/drivers/net/ethernet/ralink/gsw_mt7620a.c
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@ -602,12 +602,12 @@ static void gsw_hw_init_mt7621(struct mt7620_gsw *gsw, struct device_node *np)
udelay(10); udelay(10);
if ((rt_sysc_r32(SYSC_REG_CHIP_REV_ID) & 0xFFFF) == 0x0101) { if ((rt_sysc_r32(SYSC_REG_CHIP_REV_ID) & 0xFFFF) == 0x0101) {
/* (GE1, Force 1000M/FD, FC ON) */ /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */
gsw_w32(gsw, 0x2005e30b, 0x100); gsw_w32(gsw, 0x2105e30b, 0x100);
mt7530_mdio_w32(gsw, 0x3600, 0x5e30b); mt7530_mdio_w32(gsw, 0x3600, 0x5e30b);
} else { } else {
/* (GE1, Force 1000M/FD, FC ON) */ /* (GE1, Force 1000M/FD, FC ON, MAX_RX_LENGTH 1536) */
gsw_w32(gsw, 0x2005e33b, 0x100); gsw_w32(gsw, 0x2105e33b, 0x100);
mt7530_mdio_w32(gsw, 0x3600, 0x5e33b); mt7530_mdio_w32(gsw, 0x3600, 0x5e33b);
} }