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From: Parshuram Thombare <pthombar@cadence.com>
To: <andrew@lunn.ch>, <nicolas.ferre@microchip.com>,
	<davem@davemloft.net>, <f.fainelli@gmail.com>
Cc: <linux@armlinux.org.uk>, <netdev@vger.kernel.org>,
	<hkallweit1@gmail.com>, <linux-kernel@vger.kernel.org>,
	<rafalc@cadence.com>, <aniljoy@cadence.com>, <piotrs@cadence.com>,
	<pthombar@cadence.com>
Subject: [PATCH v2 3/5] net: macb: add support for c45 PHY
Date: Wed, 19 Jun 2019 09:40:53 +0100	[thread overview]
Message-ID: <1560933653-30043-1-git-send-email-pthombar@cadence.com> (raw)
In-Reply-To: <1560933600-27626-1-git-send-email-pthombar@cadence.com>

This patch modify MDIO read/write functions to support
communication with C45 PHY.

Signed-off-by: Parshuram Thombare <pthombar@cadence.com>
---
 drivers/net/ethernet/cadence/macb.h      | 15 ++++--
 drivers/net/ethernet/cadence/macb_main.c | 61 +++++++++++++++++++-----
 2 files changed, 61 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb.h b/drivers/net/ethernet/cadence/macb.h
index d7ffbfb2ecc0..34768d35aea1 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -667,10 +667,17 @@
 #define GEM_CLK_DIV96				5
 
 /* Constants for MAN register */
-#define MACB_MAN_SOF				1
-#define MACB_MAN_WRITE				1
-#define MACB_MAN_READ				2
-#define MACB_MAN_CODE				2
+#define MACB_MAN_C22_SOF                        1
+#define MACB_MAN_C22_WRITE                      1
+#define MACB_MAN_C22_READ                       2
+#define MACB_MAN_C22_CODE                       2
+
+#define MACB_MAN_C45_SOF                        0
+#define MACB_MAN_C45_ADDR                       0
+#define MACB_MAN_C45_WRITE                      1
+#define MACB_MAN_C45_POST_READ_INCR             2
+#define MACB_MAN_C45_READ                       3
+#define MACB_MAN_C45_CODE                       2
 
 /* Capability mask bits */
 #define MACB_CAPS_ISR_CLEAR_ON_WRITE		BIT(0)
diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 884d2a4408ad..cf63381d54ee 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -344,11 +344,30 @@ static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 	if (status < 0)
 		goto mdio_read_exit;
 
-	macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
-			      | MACB_BF(RW, MACB_MAN_READ)
-			      | MACB_BF(PHYA, mii_id)
-			      | MACB_BF(REGA, regnum)
-			      | MACB_BF(CODE, MACB_MAN_CODE)));
+	if (regnum & MII_ADDR_C45) {
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
+			    | MACB_BF(RW, MACB_MAN_C45_ADDR)
+			    | MACB_BF(PHYA, mii_id)
+			    | MACB_BF(REGA, (regnum >> 16) & 0x1F)
+			    | MACB_BF(DATA, regnum & 0xFFFF)
+			    | MACB_BF(CODE, MACB_MAN_C45_CODE)));
+
+		status = macb_mdio_wait_for_idle(bp);
+		if (status < 0)
+			goto mdio_read_exit;
+
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
+			    | MACB_BF(RW, MACB_MAN_C45_READ)
+			    | MACB_BF(PHYA, mii_id)
+			    | MACB_BF(REGA, (regnum >> 16) & 0x1F)
+			    | MACB_BF(CODE, MACB_MAN_C45_CODE)));
+	} else {
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
+				| MACB_BF(RW, MACB_MAN_C22_READ)
+				| MACB_BF(PHYA, mii_id)
+				| MACB_BF(REGA, regnum)
+				| MACB_BF(CODE, MACB_MAN_C22_CODE)));
+	}
 
 	status = macb_mdio_wait_for_idle(bp);
 	if (status < 0)
@@ -377,12 +396,32 @@ static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
 	if (status < 0)
 		goto mdio_write_exit;
 
-	macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF)
-			      | MACB_BF(RW, MACB_MAN_WRITE)
-			      | MACB_BF(PHYA, mii_id)
-			      | MACB_BF(REGA, regnum)
-			      | MACB_BF(CODE, MACB_MAN_CODE)
-			      | MACB_BF(DATA, value)));
+	if (regnum & MII_ADDR_C45) {
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
+			    | MACB_BF(RW, MACB_MAN_C45_ADDR)
+			    | MACB_BF(PHYA, mii_id)
+			    | MACB_BF(REGA, (regnum >> 16) & 0x1F)
+			    | MACB_BF(DATA, regnum & 0xFFFF)
+			    | MACB_BF(CODE, MACB_MAN_C45_CODE)));
+
+		status = macb_mdio_wait_for_idle(bp);
+		if (status < 0)
+			goto mdio_write_exit;
+
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
+			    | MACB_BF(RW, MACB_MAN_C45_WRITE)
+			    | MACB_BF(PHYA, mii_id)
+			    | MACB_BF(REGA, (regnum >> 16) & 0x1F)
+			    | MACB_BF(CODE, MACB_MAN_C45_CODE)
+			    | MACB_BF(DATA, value)));
+	} else {
+		macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
+				| MACB_BF(RW, MACB_MAN_C22_WRITE)
+				| MACB_BF(PHYA, mii_id)
+				| MACB_BF(REGA, regnum)
+				| MACB_BF(CODE, MACB_MAN_C22_CODE)
+				| MACB_BF(DATA, value)));
+	}
 
 	status = macb_mdio_wait_for_idle(bp);
 	if (status < 0)
-- 
2.17.1


  parent reply	other threads:[~2019-06-19  8:41 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-19  8:40 [PATCH v2 0/5] net: macb: cover letter Parshuram Thombare
2019-06-19  8:40 ` [PATCH v2 1/5] net: macb: add phylink support Parshuram Thombare
2019-06-19  9:22   ` Russell King - ARM Linux admin
2019-06-19 10:51     ` Parshuram Raju Thombare
2019-06-19  8:40 ` [PATCH v2 2/5] net: macb: add support for sgmii MAC-PHY interface Parshuram Thombare
2019-06-19  9:31   ` Russell King - ARM Linux admin
2019-06-19 11:23     ` Parshuram Raju Thombare
2019-06-19 12:32       ` Russell King - ARM Linux admin
2019-06-20  5:56         ` Parshuram Raju Thombare
2019-06-20  7:46           ` Russell King - ARM Linux admin
2019-06-19  8:40 ` Parshuram Thombare [this message]
2019-06-19  8:41 ` [PATCH v2 4/5] net: macb: add support for high speed interface Parshuram Thombare
2019-06-19  8:41 ` [PATCH v2 5/5] net: macb: parameter added to cadence ethernet controller DT binding Parshuram Thombare

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