netdev - [PATCH net-next v4 2/2] net: mvneta: Add support for 98DX2530 Ethernet port

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Message-Id: <20220315215207.2746793-3-chris.packham@alliedtelesis.co.nz>
Date:   Wed, 16 Mar 2022 10:52:07 +1300
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     davem@...emloft.net, kuba@...nel.org, robh+dt@...nel.org,
        thomas.petazzoni@...tlin.com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH net-next v4 2/2] net: mvneta: Add support for 98DX2530 Ethernet port

The 98DX2530 SoC is similar to the Armada 3700 except it needs a
different MBUS window configuration. Add a new compatible string to
identify this device and the required MBUS window configuration.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---

Notes:
    Changes in v4:
    - Rebase on top of net-next/master to resolve conflict with 72bb9531162a
      ("net: mvneta: reorder initialisation").
    Changes in v3:
    - Split from larger series
    - Add review from Andrew
    Changes in v2:
    - New

 drivers/net/ethernet/marvell/mvneta.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index f1335a1ed695..934f6dd90992 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -76,6 +76,8 @@
 #define MVNETA_WIN_SIZE(w)                      (0x2204 + ((w) << 3))
 #define MVNETA_WIN_REMAP(w)                     (0x2280 + ((w) << 2))
 #define MVNETA_BASE_ADDR_ENABLE                 0x2290
+#define      MVNETA_AC5_CNM_DDR_TARGET		0x2
+#define      MVNETA_AC5_CNM_DDR_ATTR		0xb
 #define MVNETA_ACCESS_PROTECT_ENABLE            0x2294
 #define MVNETA_PORT_CONFIG                      0x2400
 #define      MVNETA_UNI_PROMISC_MODE            BIT(0)
@@ -544,6 +546,7 @@ struct mvneta_port {
 
 	/* Flags for special SoC configurations */
 	bool neta_armada3700;
+	bool neta_ac5;
 	u16 rx_offset_correction;
 	const struct mbus_dram_target_info *dram_target_info;
 };
@@ -5324,6 +5327,10 @@ static void mvneta_conf_mbus_windows(struct mvneta_port *pp,
 			win_protect |= 3 << (2 * i);
 		}
 	} else {
+		if (pp->neta_ac5)
+			mvreg_write(pp, MVNETA_WIN_BASE(0),
+				    (MVNETA_AC5_CNM_DDR_ATTR << 8) |
+				    MVNETA_AC5_CNM_DDR_TARGET);
 		/* For Armada3700 open default 4GB Mbus window, leaving
 		 * arbitration of target/attribute to a different layer
 		 * of configuration.
@@ -5409,6 +5416,10 @@ static int mvneta_probe(struct platform_device *pdev)
 	/* Get special SoC configurations */
 	if (of_device_is_compatible(dn, "marvell,armada-3700-neta"))
 		pp->neta_armada3700 = true;
+	if (of_device_is_compatible(dn, "marvell,armada-ac5-neta")) {
+		pp->neta_armada3700 = true;
+		pp->neta_ac5 = true;
+	}
 
 	dev->irq = irq_of_parse_and_map(dn, 0);
 	if (dev->irq == 0)
@@ -5769,6 +5780,7 @@ static const struct of_device_id mvneta_match[] = {
 	{ .compatible = "marvell,armada-370-neta" },
 	{ .compatible = "marvell,armada-xp-neta" },
 	{ .compatible = "marvell,armada-3700-neta" },
+	{ .compatible = "marvell,armada-ac5-neta" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mvneta_match);
-- 
2.35.1