From 943ed2bae585cd595d8264a1f37fa3f3d5a5715b Mon Sep 17 00:00:00 2001 From: Frank Wunderlich Date: Sat, 8 Dec 2018 20:59:09 +0100 Subject: [PATCH 24/77] net: dsa: tell GDMA when we are turning on the special tag Enabling this bit will make the RX DMA descriptor enable the SP bit for all ingress traffic inside the return descriptor. The PPE needs this to know that a SP is present. based on https://github.com/openwrt/openwrt/blob/master/target/linux/mediatek/patches-4.14/0044-net-next-dsa-mediatek-tell-GDMA-when-we-are-turning-.patch Signed-off-by: Frank Wunderlich --- drivers/net/dsa/mt7530.c | 6 ++++++ drivers/net/dsa/mt7530.h | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index fda1b67dfeac..9690a9b59fce 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -685,6 +685,12 @@ mt7530_cpu_port_enable(struct mt7530_priv *priv, mt7530_write(priv, MT7530_PVC_P(port), PORT_SPEC_TAG); + /* Enable Mediatek header mode on the GMAC that the cpu port + * connects to + */ + regmap_write_bits(priv->ethernet, MTK_GDMA_FWD_CFG(port), + GDMA_SPEC_TAG, GDMA_SPEC_TAG); + /* Setup the MAC by default for the cpu port */ mt7530_write(priv, MT7530_PMCR_P(port), PMCR_CPUP_LINK); diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h index d9b407a22a58..310f2536175b 100644 --- a/drivers/net/dsa/mt7530.h +++ b/drivers/net/dsa/mt7530.h @@ -23,6 +23,10 @@ #define TRGMII_BASE(x) (0x10000 + (x)) +/* Registers for GDMA configuration access */ +#define MTK_GDMA_FWD_CFG(x) (0x500 + (x * 0x1000)) +#define GDMA_SPEC_TAG BIT(24) + /* Registers to ethsys access */ #define ETHSYS_CLKCFG0 0x2c #define ETHSYS_TRGMII_CLK_SEL362_5 BIT(11) -- 2.19.1