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From: Milind Parab <mparab@cadence.com>
To: <andrew@lunn.ch>, <nicolas.ferre@microchip.com>,
	<davem@davemloft.net>, <f.fainelli@gmail.com>
Cc: <netdev@vger.kernel.org>, <hkallweit1@gmail.com>,
	<linux-kernel@vger.kernel.org>, <piotrs@cadence.com>,
	<dkangude@cadence.com>, <ewanm@cadence.com>,
	<arthurm@cadence.com>, <stevenh@cadence.com>,
	Milind Parab <mparab@cadence.com>
Subject: [PATCH 3/4] net: macb: add support for c45 PHY
Date: Fri, 8 Nov 2019 13:34:40 +0000	[thread overview]
Message-ID: <1573220080-18344-1-git-send-email-mparab@cadence.com> (raw)
In-Reply-To: <1573220027-15842-1-git-send-email-mparab@cadence.com>

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

Signed-off-by: Milind Parab <mparab@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 5e2957d..34136a8 100644
--- a/drivers/net/ethernet/cadence/macb.h
+++ b/drivers/net/ethernet/cadence/macb.h
@@ -646,10 +646,17 @@
 #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 8269d7a..fe107f0 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -337,11 +337,30 @@ 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)
@@ -370,12 +389,32 @@ 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)
-- 
1.7.1


  parent reply	other threads:[~2019-11-08 13:34 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-08 13:33 [PATCH 0/4] net: macb: cover letter Milind Parab
2019-11-08 13:34 ` [PATCH 1/4] net: macb: add phylink support Milind Parab
2019-11-08 15:42   ` Antoine Tenart
2019-11-11  8:53     ` Milind Parab
2019-11-12  8:24       ` Antoine Tenart
2019-11-08 13:34 ` [PATCH 2/4] net: macb: add support for sgmii MAC-PHY interface Milind Parab
2019-11-08 13:34 ` Milind Parab [this message]
2019-11-08 13:34 ` [PATCH 4/4] net: macb: add support for high speed interface Milind Parab

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