From patchwork Wed Mar 29 09:38:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [net-next, v3, 3/5] net-next: ethernet: mediatek: add CDM able to recognize the tag for DSA From: sean.wang@mediatek.com X-Patchwork-Id: 9651091 Message-Id: <1490780303-18598-4-git-send-email-sean.wang@mediatek.com> To: , , , , , Cc: devicetree@vger.kernel.org, Landen.Chao@mediatek.com, keyhaede@gmail.com, netdev@vger.kernel.org, sean.wang@mediatek.com, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, objelf@gmail.com, davem@davemloft.net Date: Wed, 29 Mar 2017 17:38:21 +0800 From: Sean Wang 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 Signed-off-by: Landen Chao Reviewed-by: Andrew Lunn Reviewed-by: Florian Fainelli --- 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 @@ -1855,6 +1855,12 @@ static int mtk_hw_init(struct mtk_eth *e /* GE2, Force 1000M/FD, FC ON */ mtk_w32(eth, MAC_MCR_FIXED_LINK, MTK_MAC_MCR(1)); + /* 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 @@ -70,6 +70,10 @@ /* Frame Engine Interrupt Grouping Register */ #define MTK_FE_INT_GRP 0x20 +/* 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