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Subject[PATCH 6/7] [DSA] tell GDMA when we are turning on the special tag
Date
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 <frank-w@public-files.de>
---
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 441320d4d779..83669f53cb36 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -681,6 +681,12 @@ 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)
--
2.17.1
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