netdev - [PATCH net-next 04/10] net: mdio: aspeed: Separate C22 and C45 transactions

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Date:   Thu, 12 Jan 2023 16:15:10 +0100
From:   Michael Walle <michael@...le.cc>
To:     Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Broadcom internal kernel review list 
        <bcm-kernel-feedback-list@...adcom.com>,
        Joel Stanley <joel@....id.au>,
        Andrew Jeffery <andrew@...id.au>, Felix Fietkau <nbd@....name>,
        John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Bryan Whitehead <bryan.whitehead@...rochip.com>,
        UNGLinuxDriver@...rochip.com,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Li Yang <leoyang.li@....com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-mediatek@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linuxppc-dev@...ts.ozlabs.org, Andrew Lunn <andrew@...n.ch>,
        Michael Walle <michael@...le.cc>
Subject: [PATCH net-next 04/10] net: mdio: aspeed: Separate C22 and C45 transactions

From: Andrew Lunn <andrew@...n.ch>

The aspeed MDIO bus driver can perform both C22 and C45 transfers.
Modify the existing C45 functions to take the devad as a parameter,
and remove the wrappers so there are individual C22 and C45 functions. Add
the C45 functions to the new API calls.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
Signed-off-by: Michael Walle <michael@...le.cc>
---
 drivers/net/mdio/mdio-aspeed.c | 47 +++++++++++-------------------------------
 1 file changed, 12 insertions(+), 35 deletions(-)

diff --git a/drivers/net/mdio/mdio-aspeed.c b/drivers/net/mdio/mdio-aspeed.c
index 944d005d2bd1..2f4bbda5e56c 100644
--- a/drivers/net/mdio/mdio-aspeed.c
+++ b/drivers/net/mdio/mdio-aspeed.c
@@ -104,61 +104,36 @@ static int aspeed_mdio_write_c22(struct mii_bus *bus, int addr, int regnum,
 			      addr, regnum, val);
 }
 
-static int aspeed_mdio_read_c45(struct mii_bus *bus, int addr, int regnum)
+static int aspeed_mdio_read_c45(struct mii_bus *bus, int addr, int devad,
+				int regnum)
 {
-	u8 c45_dev = (regnum >> 16) & 0x1F;
-	u16 c45_addr = regnum & 0xFFFF;
 	int rc;
 
 	rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_ADDR,
-			    addr, c45_dev, c45_addr);
+			    addr, devad, regnum);
 	if (rc < 0)
 		return rc;
 
 	rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_READ,
-			    addr, c45_dev, 0);
+			    addr, devad, 0);
 	if (rc < 0)
 		return rc;
 
 	return aspeed_mdio_get_data(bus);
 }
 
-static int aspeed_mdio_write_c45(struct mii_bus *bus, int addr, int regnum,
-				 u16 val)
+static int aspeed_mdio_write_c45(struct mii_bus *bus, int addr, int devad,
+				 int regnum, u16 val)
 {
-	u8 c45_dev = (regnum >> 16) & 0x1F;
-	u16 c45_addr = regnum & 0xFFFF;
 	int rc;
 
 	rc = aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_ADDR,
-			    addr, c45_dev, c45_addr);
+			    addr, devad, regnum);
 	if (rc < 0)
 		return rc;
 
 	return aspeed_mdio_op(bus, ASPEED_MDIO_CTRL_ST_C45, MDIO_C45_OP_WRITE,
-			      addr, c45_dev, val);
-}
-
-static int aspeed_mdio_read(struct mii_bus *bus, int addr, int regnum)
-{
-	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d\n", __func__, addr,
-		regnum);
-
-	if (regnum & MII_ADDR_C45)
-		return aspeed_mdio_read_c45(bus, addr, regnum);
-
-	return aspeed_mdio_read_c22(bus, addr, regnum);
-}
-
-static int aspeed_mdio_write(struct mii_bus *bus, int addr, int regnum, u16 val)
-{
-	dev_dbg(&bus->dev, "%s: addr: %d, regnum: %d, val: 0x%x\n",
-		__func__, addr, regnum, val);
-
-	if (regnum & MII_ADDR_C45)
-		return aspeed_mdio_write_c45(bus, addr, regnum, val);
-
-	return aspeed_mdio_write_c22(bus, addr, regnum, val);
+			      addr, devad, val);
 }
 
 static int aspeed_mdio_probe(struct platform_device *pdev)
@@ -185,8 +160,10 @@ static int aspeed_mdio_probe(struct platform_device *pdev)
 	bus->name = DRV_NAME;
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id);
 	bus->parent = &pdev->dev;
-	bus->read = aspeed_mdio_read;
-	bus->write = aspeed_mdio_write;
+	bus->read = aspeed_mdio_read_c22;
+	bus->write = aspeed_mdio_write_c22;
+	bus->read_c45 = aspeed_mdio_read_c45;
+	bus->write_c45 = aspeed_mdio_write_c45;
 	bus->probe_capabilities = MDIOBUS_C22_C45;
 
 	rc = of_mdiobus_register(bus, pdev->dev.of_node);

-- 
2.30.2