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-rw-r--r--target/linux/mediatek/patches-4.9/0029-net-next-ethernet-mediatek-add-CDM-able-to-recognize.patch48
1 files changed, 48 insertions, 0 deletions
diff --git a/target/linux/mediatek/patches-4.9/0029-net-next-ethernet-mediatek-add-CDM-able-to-recognize.patch b/target/linux/mediatek/patches-4.9/0029-net-next-ethernet-mediatek-add-CDM-able-to-recognize.patch
new file mode 100644
index 0000000..5c7e6e4
--- /dev/null
+++ b/target/linux/mediatek/patches-4.9/0029-net-next-ethernet-mediatek-add-CDM-able-to-recognize.patch
@@ -0,0 +1,48 @@
+From de3c04b820e1d396bf12e88ea87271a84f6fedb7 Mon Sep 17 00:00:00 2001
+From: Sean Wang <sean.wang@mediatek.com>
+Date: Wed, 29 Mar 2017 17:38:21 +0800
+Subject: [PATCH 29/57] net-next: ethernet: mediatek: add CDM able to recognize
+ the tag for DSA
+
+The patch adds the setup for allowing CDM can recognize these packets with
+carrying port-distinguishing tag. Otherwise, these tagging packets will be
+handled incorrectly by CDM. The setup is also working out for general
+untag packets as well.
+
+Signed-off-by: Sean Wang <sean.wang@mediatek.com>
+Signed-off-by: Landen Chao <Landen.Chao@mediatek.com>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 6 ++++++
+ drivers/net/ethernet/mediatek/mtk_eth_soc.h | 4 ++++
+ 2 files changed, 10 insertions(+)
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -1864,6 +1864,12 @@ static int mtk_hw_init(struct mtk_eth *e
+ val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
+ mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
+
++ /* Indicates CDM to parse the MTK special tag from CPU
++ * which also is working out for untag packets.
++ */
++ val = mtk_r32(eth, MTK_CDMQ_IG_CTRL);
++ mtk_w32(eth, val | MTK_CDMQ_STAG_EN, MTK_CDMQ_IG_CTRL);
++
+ /* Enable RX VLan Offloading */
+ mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+@@ -74,6 +74,10 @@
+ #define MTK_CDMQ_IG_CTRL 0x1400
+ #define MTK_CDMQ_STAG_EN BIT(0)
+
++/* CDMP Ingress Control Register */
++#define MTK_CDMQ_IG_CTRL 0x1400
++#define MTK_CDMQ_STAG_EN BIT(0)
++
+ /* CDMP Exgress Control Register */
+ #define MTK_CDMP_EG_CTRL 0x404
+