[PATCH net-next 04/12] net: macb: Separate C22 and C45 transactions

[Michael Walle]

From: Andrew Lunn <andrew@xxxxxxx>

The macb MDIO bus driver can perform both C22 and C45 transfers.
Create separate functions for each and register the C45 versions using
the new API calls where appropriate.

Signed-off-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Michael Walle <michael@xxxxxxxx>
---
 drivers/net/ethernet/cadence/macb_main.c | 161 +++++++++++++++++++++----------
 1 file changed, 108 insertions(+), 53 deletions(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 95667b979fab..f2d08a2dadf9 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -334,7 +334,7 @@ static int macb_mdio_wait_for_idle(struct macb *bp)
 				  1, MACB_MDIO_TIMEOUT);
 }
 
-static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+static int macb_mdio_read_c22(struct mii_bus *bus, int mii_id, int regnum)
 {
 	struct macb *bp = bus->priv;
 	int status;
@@ -347,31 +347,58 @@ static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 	if (status < 0)
 		goto mdio_read_exit;
 
-	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)));
+	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)
+		goto mdio_read_exit;
+
+	status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
+
+mdio_read_exit:
+	pm_runtime_mark_last_busy(&bp->pdev->dev);
+	pm_runtime_put_autosuspend(&bp->pdev->dev);
+mdio_pm_exit:
+	return status;
+}
+
+static int macb_mdio_read_c45(struct mii_bus *bus, int mii_id, int devad,
+			      int regnum)
+{
+	struct macb *bp = bus->priv;
+	int status;
+
+	status = pm_runtime_get_sync(&bp->pdev->dev);
+	if (status < 0) {
+		pm_runtime_put_noidle(&bp->pdev->dev);
+		goto mdio_pm_exit;
 	}
 
+	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_ADDR)
+			      | MACB_BF(PHYA, mii_id)
+			      | MACB_BF(REGA, devad & 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, devad & 0x1F)
+			      | MACB_BF(CODE, MACB_MAN_C45_CODE)));
+
 	status = macb_mdio_wait_for_idle(bp);
 	if (status < 0)
 		goto mdio_read_exit;
@@ -385,8 +412,8 @@ static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 	return status;
 }
 
-static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
-			   u16 value)
+static int macb_mdio_write_c22(struct mii_bus *bus, int mii_id, int regnum,
+			       u16 value)
 {
 	struct macb *bp = bus->priv;
 	int status;
@@ -399,37 +426,63 @@ static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
 	if (status < 0)
 		goto mdio_write_exit;
 
-	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)));
+	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)
+		goto mdio_write_exit;
+
+mdio_write_exit:
+	pm_runtime_mark_last_busy(&bp->pdev->dev);
+	pm_runtime_put_autosuspend(&bp->pdev->dev);
+mdio_pm_exit:
+	return status;
+}
+
+static int macb_mdio_write_c45(struct mii_bus *bus, int mii_id,
+			       int devad, int regnum,
+			       u16 value)
+{
+	struct macb *bp = bus->priv;
+	int status;
+
+	status = pm_runtime_get_sync(&bp->pdev->dev);
+	if (status < 0) {
+		pm_runtime_put_noidle(&bp->pdev->dev);
+		goto mdio_pm_exit;
 	}
 
 	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_ADDR)
+			      | MACB_BF(PHYA, mii_id)
+			      | MACB_BF(REGA, devad & 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, devad & 0x1F)
+			      | MACB_BF(CODE, MACB_MAN_C45_CODE)
+			      | MACB_BF(DATA, value)));
+
+	status = macb_mdio_wait_for_idle(bp);
+	if (status < 0)
+		goto mdio_write_exit;
+
 mdio_write_exit:
 	pm_runtime_mark_last_busy(&bp->pdev->dev);
 	pm_runtime_put_autosuspend(&bp->pdev->dev);
@@ -902,8 +955,10 @@ static int macb_mii_init(struct macb *bp)
 	}
 
 	bp->mii_bus->name = "MACB_mii_bus";
-	bp->mii_bus->read = &macb_mdio_read;
-	bp->mii_bus->write = &macb_mdio_write;
+	bp->mii_bus->read = &macb_mdio_read_c22;
+	bp->mii_bus->write = &macb_mdio_write_c22;
+	bp->mii_bus->read_c45 = &macb_mdio_read_c45;
+	bp->mii_bus->write_c45 = &macb_mdio_write_c45;
 	snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		 bp->pdev->name, bp->pdev->id);
 	bp->mii_bus->priv = bp;

-- 
2.30.2