[PATCH net-next v3 00/11] net: mdio: Start separating C22 and C45

[PATCH net-next v3 00/11] net: mdio: Start separating C22 and C45

[Michael Walle]

I've picked this older series from Andrew up and rebased it onto
v6.2-rc1.

This patch set starts the separation of C22 and C45 MDIO bus
transactions at the API level to the MDIO Bus drivers. C45 read and
write ops are added to the MDIO bus driver structure, and the MDIO
core will try to use these ops if requested to perform a C45
transfer. If not available a fallback to the older API is made, to
allow backwards compatibility until all drivers are converted.

A few drivers are then converted to this new API.

The core DSA patch was dropped for now as there is still an ongoing
discussion. It will be picked up in a later series again.

To: Heiner Kallweit <hkallweit1@gmail.com>
To: Russell King <linux@armlinux.org.uk>
To: "David S. Miller" <davem@davemloft.net>
To: Eric Dumazet <edumazet@google.com>
To: Jakub Kicinski <kuba@kernel.org>
To: Paolo Abeni <pabeni@redhat.com>
To: Jose Abreu <Jose.Abreu@synopsys.com>
To: Sergey Shtylyov <s.shtylyov@omp.ru>
To: Wei Fang <wei.fang@nxp.com>
To: Shenwei Wang <shenwei.wang@nxp.com>
To: Clark Wang <xiaoning.wang@nxp.com>
To: NXP Linux Team <linux-imx@nxp.com>
To: Sean Wang <sean.wang@mediatek.com>
To: Landen Chao <Landen.Chao@mediatek.com>
To: DENG Qingfang <dqfext@gmail.com>
To: Florian Fainelli <f.fainelli@gmail.com>
To: Vladimir Oltean <olteanv@gmail.com>
To: Matthias Brugger <matthias.bgg@gmail.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>

---
Link to v2: https://lore.kernel.org/r/20221227-v6-2-rc1-c45-seperation-v2-0-ddb37710e5a7@walle.cc
Link to v1: https://lore.kernel.org/r/20220508153049.427227-1-andrew@lunn.ch

---
Andrew Lunn (11):
      net: mdio: Add dedicated C45 API to MDIO bus drivers
      net: pcs: pcs-xpcs: Use C45 MDIO API
      net: mdio: mdiobus_register: update validation test
      net: mdio: C22 is now optional, EOPNOTSUPP if not provided
      net: mdio: Move mdiobus_c45_addr() next to users
      net: mdio: mdio-bitbang: Separate C22 and C45 transactions
      net: mdio: mvmdio: Convert XSMI bus to new API
      net: mdio: xgmac_mdio: Separate C22 and C45 transactions
      net: fec: Separate C22 and C45 transactions
      net: mdio: add mdiobus_c45_read/write_nested helpers
      net: dsa: mv88e6xxx: Separate C22 and C45 transactions

 drivers/net/dsa/mv88e6xxx/chip.c            | 175 +++++++++++++-----
 drivers/net/dsa/mv88e6xxx/chip.h            |   7 +
 drivers/net/dsa/mv88e6xxx/global2.c         |  66 ++++---
 drivers/net/dsa/mv88e6xxx/global2.h         |  18 +-
 drivers/net/dsa/mv88e6xxx/phy.c             |  32 ++++
 drivers/net/dsa/mv88e6xxx/phy.h             |   4 +
 drivers/net/dsa/mv88e6xxx/serdes.c          |   8 +-
 drivers/net/ethernet/freescale/fec_main.c   | 153 ++++++++++------
 drivers/net/ethernet/freescale/xgmac_mdio.c | 148 ++++++++++-----
 drivers/net/ethernet/marvell/mvmdio.c       |  24 +--
 drivers/net/ethernet/renesas/sh_eth.c       |  37 +++-
 drivers/net/ethernet/ti/davinci_mdio.c      |  50 +++++-
 drivers/net/mdio/mdio-bitbang.c             |  77 +++++---
 drivers/net/pcs/pcs-xpcs.c                  |   4 +-
 drivers/net/phy/mdio_bus.c                  | 270 +++++++++++++++++++++++++++-
 include/linux/mdio-bitbang.h                |   6 +-
 include/linux/mdio.h                        |  48 ++---
 include/linux/phy.h                         |   5 +
 18 files changed, 870 insertions(+), 262 deletions(-)
---
base-commit: 12c1604ae1a39bef87ac099f106594b4cb433b75
change-id: 20221227-v6-2-rc1-c45-seperation-53f762440aa1

Best regards,
-- 
Michael Walle <michael@walle.cc>

[PATCH net-next v3 01/11] net: mdio: Add dedicated C45 API to MDIO bus drivers

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

Currently C22 and C45 transactions are mixed over a combined API calls
which make use of a special bit in the reg address to indicate if a
C45 transaction should be performed. This makes it impossible to know
if the bus driver actually supports C45. Additionally, many C22 only
drivers don't return -EOPNOTSUPP when asked to perform a C45
transaction, they mistaking perform a C22 transaction.

This is the first step to cleanly separate C22 from C45. To maintain
backwards compatibility until all drivers which are capable of
performing C45 are converted to this new API, the helper functions
will fall back to the older API if the new API is not
supported. Eventually this fallback will be removed.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
 drivers/net/phy/mdio_bus.c | 189 +++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mdio.h       |  39 +++++-----
 include/linux/phy.h        |   5 ++
 3 files changed, 214 insertions(+), 19 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 1cd604cd1fa1..bde195864c17 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -826,6 +826,100 @@ int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 }
 EXPORT_SYMBOL_GPL(__mdiobus_modify_changed);
 
+/**
+ * __mdiobus_c45_read - Unlocked version of the mdiobus_c45_read function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * Read a MDIO bus register. Caller must hold the mdio bus lock.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
+{
+	int retval;
+
+	lockdep_assert_held_once(&bus->mdio_lock);
+
+	if (bus->read_c45)
+		retval = bus->read_c45(bus, addr, devad, regnum);
+	else
+		retval = bus->read(bus, addr, mdiobus_c45_addr(devad, regnum));
+
+	trace_mdio_access(bus, 1, addr, regnum, retval, retval);
+	mdiobus_stats_acct(&bus->stats[addr], true, retval);
+
+	return retval;
+}
+EXPORT_SYMBOL(__mdiobus_c45_read);
+
+/**
+ * __mdiobus_c45_write - Unlocked version of the mdiobus_write function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * Write a MDIO bus register. Caller must hold the mdio bus lock.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+int __mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
+			u16 val)
+{
+	int err;
+
+	lockdep_assert_held_once(&bus->mdio_lock);
+
+	if (bus->write_c45)
+		err = bus->write_c45(bus, addr, devad, regnum, val);
+	else
+		err = bus->write(bus, addr, mdiobus_c45_addr(devad, regnum),
+				 val);
+
+	trace_mdio_access(bus, 0, addr, regnum, val, err);
+	mdiobus_stats_acct(&bus->stats[addr], false, err);
+
+	return err;
+}
+EXPORT_SYMBOL(__mdiobus_c45_write);
+
+/**
+ * __mdiobus_c45_modify_changed - Unlocked version of the mdiobus_modify function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to modify
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ *
+ * Read, modify, and if any change, write the register value back to the
+ * device. Any error returns a negative number.
+ *
+ * NOTE: MUST NOT be called from interrupt context.
+ */
+static int __mdiobus_c45_modify_changed(struct mii_bus *bus, int addr,
+					int devad, u32 regnum, u16 mask,
+					u16 set)
+{
+	int new, ret;
+
+	ret = __mdiobus_c45_read(bus, addr, devad, regnum);
+	if (ret < 0)
+		return ret;
+
+	new = (ret & ~mask) | set;
+	if (new == ret)
+		return 0;
+
+	ret = __mdiobus_c45_write(bus, addr, devad, regnum, new);
+
+	return ret < 0 ? ret : 1;
+}
+
 /**
  * mdiobus_read_nested - Nested version of the mdiobus_read function
  * @bus: the mii_bus struct
@@ -873,6 +967,29 @@ int mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
 }
 EXPORT_SYMBOL(mdiobus_read);
 
+/**
+ * mdiobus_c45_read - Convenience function for reading a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
+{
+	int retval;
+
+	mutex_lock(&bus->mdio_lock);
+	retval = __mdiobus_c45_read(bus, addr, devad, regnum);
+	mutex_unlock(&bus->mdio_lock);
+
+	return retval;
+}
+EXPORT_SYMBOL(mdiobus_c45_read);
+
 /**
  * mdiobus_write_nested - Nested version of the mdiobus_write function
  * @bus: the mii_bus struct
@@ -922,6 +1039,31 @@ int mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 }
 EXPORT_SYMBOL(mdiobus_write);
 
+/**
+ * mdiobus_c45_write - Convenience function for writing a given MII mgmt register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
+		      u16 val)
+{
+	int err;
+
+	mutex_lock(&bus->mdio_lock);
+	err = __mdiobus_c45_write(bus, addr, devad, regnum, val);
+	mutex_unlock(&bus->mdio_lock);
+
+	return err;
+}
+EXPORT_SYMBOL(mdiobus_c45_write);
+
 /**
  * mdiobus_modify - Convenience function for modifying a given mdio device
  *	register
@@ -943,6 +1085,30 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask, u16 set)
 }
 EXPORT_SYMBOL_GPL(mdiobus_modify);
 
+/**
+ * mdiobus_c45_modify - Convenience function for modifying a given mdio device
+ *	register
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ */
+int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
+		       u16 mask, u16 set)
+{
+	int err;
+
+	mutex_lock(&bus->mdio_lock);
+	err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum,
+					   mask, set);
+	mutex_unlock(&bus->mdio_lock);
+
+	return err < 0 ? err : 0;
+}
+EXPORT_SYMBOL_GPL(mdiobus_c45_modify);
+
 /**
  * mdiobus_modify_changed - Convenience function for modifying a given mdio
  *	device register and returning if it changed
@@ -965,6 +1131,29 @@ int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 }
 EXPORT_SYMBOL_GPL(mdiobus_modify_changed);
 
+/**
+ * mdiobus_c45_modify_changed - Convenience function for modifying a given mdio
+ *	device register and returning if it changed
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @mask: bit mask of bits to clear
+ * @set: bit mask of bits to set
+ */
+int mdiobus_c45_modify_changed(struct mii_bus *bus, int devad, int addr,
+			       u32 regnum, u16 mask, u16 set)
+{
+	int err;
+
+	mutex_lock(&bus->mdio_lock);
+	err = __mdiobus_c45_modify_changed(bus, addr, devad, regnum, mask, set);
+	mutex_unlock(&bus->mdio_lock);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(mdiobus_c45_modify_changed);
+
 /**
  * mdio_bus_match - determine if given MDIO driver supports the given
  *		    MDIO device
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index f7fbbf3069e7..1e78c8410b21 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -423,6 +423,17 @@ int mdiobus_modify(struct mii_bus *bus, int addr, u32 regnum, u16 mask,
 		   u16 set);
 int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 			   u16 mask, u16 set);
+int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
+int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
+int __mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
+			u16 val);
+int mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
+		      u16 val);
+int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
+		       u16 mask, u16 set);
+
+int mdiobus_c45_modify_changed(struct mii_bus *bus, int addr, int devad,
+			       u32 regnum, u16 mask, u16 set);
 
 static inline int mdiodev_read(struct mdio_device *mdiodev, u32 regnum)
 {
@@ -463,29 +474,19 @@ static inline u16 mdiobus_c45_devad(u32 regnum)
 	return FIELD_GET(MII_DEVADDR_C45_MASK, regnum);
 }
 
-static inline int __mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
-				     u16 regnum)
+static inline int mdiodev_c45_modify(struct mdio_device *mdiodev, int devad,
+				     u32 regnum, u16 mask, u16 set)
 {
-	return __mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
+	return mdiobus_c45_modify(mdiodev->bus, mdiodev->addr, devad, regnum,
+				  mask, set);
 }
 
-static inline int __mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
-				      u16 regnum, u16 val)
+static inline int mdiodev_c45_modify_changed(struct mdio_device *mdiodev,
+					     int devad, u32 regnum, u16 mask,
+					     u16 set)
 {
-	return __mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum),
-			       val);
-}
-
-static inline int mdiobus_c45_read(struct mii_bus *bus, int prtad, int devad,
-				   u16 regnum)
-{
-	return mdiobus_read(bus, prtad, mdiobus_c45_addr(devad, regnum));
-}
-
-static inline int mdiobus_c45_write(struct mii_bus *bus, int prtad, int devad,
-				    u16 regnum, u16 val)
-{
-	return mdiobus_write(bus, prtad, mdiobus_c45_addr(devad, regnum), val);
+	return mdiobus_c45_modify_changed(mdiodev->bus, mdiodev->addr, devad,
+					  regnum, mask, set);
 }
 
 static inline int mdiodev_c45_read(struct mdio_device *mdiodev, int devad,
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 6378c997ded5..65844f0a7fb3 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -364,6 +364,11 @@ struct mii_bus {
 	int (*read)(struct mii_bus *bus, int addr, int regnum);
 	/** @write: Perform a write transfer on the bus */
 	int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
+	/** @read: Perform a C45 read transfer on the bus */
+	int (*read_c45)(struct mii_bus *bus, int addr, int devnum, int regnum);
+	/** @write: Perform a C45 write transfer on the bus */
+	int (*write_c45)(struct mii_bus *bus, int addr, int devnum,
+			 int regnum, u16 val);
 	/** @reset: Perform a reset of the bus */
 	int (*reset)(struct mii_bus *bus);
 

-- 
2.30.2

[PATCH net-next v3 02/11] net: pcs: pcs-xpcs: Use C45 MDIO API

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

Convert the PCS-XPCS driver to make use of the C45 MDIO bus API for
modify_change().

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v2:
 - [al] new patch
---
 drivers/net/pcs/pcs-xpcs.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index f6a038a1d51e..bc428a816719 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -199,9 +199,7 @@ int xpcs_write(struct dw_xpcs *xpcs, int dev, u32 reg, u16 val)
 static int xpcs_modify_changed(struct dw_xpcs *xpcs, int dev, u32 reg,
 			       u16 mask, u16 set)
 {
-	u32 reg_addr = mdiobus_c45_addr(dev, reg);
-
-	return mdiodev_modify_changed(xpcs->mdiodev, reg_addr, mask, set);
+	return mdiodev_c45_modify_changed(xpcs->mdiodev, dev, reg, mask, set);
 }
 
 static int xpcs_read_vendor(struct dw_xpcs *xpcs, int dev, u32 reg)

-- 
2.30.2

[PATCH net-next v3 03/11] net: mdio: mdiobus_register: update validation test

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

Now that C45 uses its own read/write methods, the validation performed
when a bus is registers needs updating. All combinations of C22 and
C45 are supported, but both read and write methods must be provided,
read only busses are not supported etc.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
v2:
 - [al] be consistent with other checks
 - [mw] make the test a bit easier to read
v3:
 - [mw] use the original validation test style again but with double
   negation
---
 drivers/net/phy/mdio_bus.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index bde195864c17..c992a9fd8b01 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -526,8 +526,15 @@ int __mdiobus_register(struct mii_bus *bus, struct module *owner)
 	int i, err;
 	struct gpio_desc *gpiod;
 
-	if (NULL == bus || NULL == bus->name ||
-	    NULL == bus->read || NULL == bus->write)
+	if (!bus || !bus->name)
+		return -EINVAL;
+
+	/* An access method always needs both read and write operations */
+	if (!!bus->read != !!bus->write || !!bus->read_c45 != !!bus->write_c45)
+		return -EINVAL;
+
+	/* At least one method is mandatory */
+	if (!bus->read && !bus->read_c45)
 		return -EINVAL;
 
 	if (bus->parent && bus->parent->of_node)

-- 
2.30.2

[PATCH net-next v3 04/11] net: mdio: C22 is now optional, EOPNOTSUPP if not provided

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

When performing a C22 operation, check that the bus driver actually
provides the methods, and return -EOPNOTSUPP if not. C45 only busses
do exist, and in future their C22 methods will be NULL.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
 drivers/net/phy/mdio_bus.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index c992a9fd8b01..f71ba6ab85a7 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -766,7 +766,10 @@ int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum)
 
 	lockdep_assert_held_once(&bus->mdio_lock);
 
-	retval = bus->read(bus, addr, regnum);
+	if (bus->read)
+		retval = bus->read(bus, addr, regnum);
+	else
+		retval = -EOPNOTSUPP;
 
 	trace_mdio_access(bus, 1, addr, regnum, retval, retval);
 	mdiobus_stats_acct(&bus->stats[addr], true, retval);
@@ -792,7 +795,10 @@ int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val)
 
 	lockdep_assert_held_once(&bus->mdio_lock);
 
-	err = bus->write(bus, addr, regnum, val);
+	if (bus->write)
+		err = bus->write(bus, addr, regnum, val);
+	else
+		err = -EOPNOTSUPP;
 
 	trace_mdio_access(bus, 0, addr, regnum, val, err);
 	mdiobus_stats_acct(&bus->stats[addr], false, err);

-- 
2.30.2

[PATCH net-next v3 05/11] net: mdio: Move mdiobus_c45_addr() next to users

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

Now that mdiobus_c45_addr() is only used within the MDIO code during
fallback, move the function next to its only users. This function
should not be used any more in drivers, the c45 helpers should be used
in its place, so hiding it away will prevent any new users from being
added.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
 drivers/net/phy/mdio_bus.c | 5 +++++
 include/linux/mdio.h       | 5 -----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index f71ba6ab85a7..522cbe6a0b23 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -839,6 +839,11 @@ int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 }
 EXPORT_SYMBOL_GPL(__mdiobus_modify_changed);
 
+static u32 mdiobus_c45_addr(int devad, u16 regnum)
+{
+	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
+}
+
 /**
  * __mdiobus_c45_read - Unlocked version of the mdiobus_c45_read function
  * @bus: the mii_bus struct
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 1e78c8410b21..97b49765e8b5 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -459,11 +459,6 @@ static inline int mdiodev_modify_changed(struct mdio_device *mdiodev,
 				      mask, set);
 }
 
-static inline u32 mdiobus_c45_addr(int devad, u16 regnum)
-{
-	return MII_ADDR_C45 | devad << MII_DEVADDR_C45_SHIFT | regnum;
-}
-
 static inline u16 mdiobus_c45_regad(u32 regnum)
 {
 	return FIELD_GET(MII_REGADDR_C45_MASK, regnum);

-- 
2.30.2

[PATCH net-next v3 06/11] net: mdio: mdio-bitbang: Separate C22 and C45 transactions

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

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

The SH Ethernet driver places wrappers around these functions. In
order to not break boards which might be using C45, add similar
wrappers for C45 operations.

Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
v3:
 - [mw] Also apply the changes to davinci-mdio. This was missing in v2.
---
 drivers/net/ethernet/renesas/sh_eth.c  | 37 +++++++++++++---
 drivers/net/ethernet/ti/davinci_mdio.c | 50 ++++++++++++++++++----
 drivers/net/mdio/mdio-bitbang.c        | 77 +++++++++++++++++++++++-----------
 include/linux/mdio-bitbang.h           |  6 ++-
 4 files changed, 130 insertions(+), 40 deletions(-)

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 71a499113308..ed17163d7811 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -3044,23 +3044,46 @@ static int sh_mdio_release(struct sh_eth_private *mdp)
 	return 0;
 }
 
-static int sh_mdiobb_read(struct mii_bus *bus, int phy, int reg)
+static int sh_mdiobb_read_c22(struct mii_bus *bus, int phy, int reg)
 {
 	int res;
 
 	pm_runtime_get_sync(bus->parent);
-	res = mdiobb_read(bus, phy, reg);
+	res = mdiobb_read_c22(bus, phy, reg);
 	pm_runtime_put(bus->parent);
 
 	return res;
 }
 
-static int sh_mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val)
+static int sh_mdiobb_write_c22(struct mii_bus *bus, int phy, int reg, u16 val)
 {
 	int res;
 
 	pm_runtime_get_sync(bus->parent);
-	res = mdiobb_write(bus, phy, reg, val);
+	res = mdiobb_write_c22(bus, phy, reg, val);
+	pm_runtime_put(bus->parent);
+
+	return res;
+}
+
+static int sh_mdiobb_read_c45(struct mii_bus *bus, int phy, int devad, int reg)
+{
+	int res;
+
+	pm_runtime_get_sync(bus->parent);
+	res = mdiobb_read_c45(bus, phy, devad, reg);
+	pm_runtime_put(bus->parent);
+
+	return res;
+}
+
+static int sh_mdiobb_write_c45(struct mii_bus *bus, int phy, int devad,
+			       int reg, u16 val)
+{
+	int res;
+
+	pm_runtime_get_sync(bus->parent);
+	res = mdiobb_write_c45(bus, phy, devad, reg, val);
 	pm_runtime_put(bus->parent);
 
 	return res;
@@ -3091,8 +3114,10 @@ static int sh_mdio_init(struct sh_eth_private *mdp,
 		return -ENOMEM;
 
 	/* Wrap accessors with Runtime PM-aware ops */
-	mdp->mii_bus->read = sh_mdiobb_read;
-	mdp->mii_bus->write = sh_mdiobb_write;
+	mdp->mii_bus->read = sh_mdiobb_read_c22;
+	mdp->mii_bus->write = sh_mdiobb_write_c22;
+	mdp->mii_bus->read_c45 = sh_mdiobb_read_c45;
+	mdp->mii_bus->write_c45 = sh_mdiobb_write_c45;
 
 	/* Hook up MII support for ethtool */
 	mdp->mii_bus->name = "sh_mii";
diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c
index 946b9753ccfb..23169e36a3d4 100644
--- a/drivers/net/ethernet/ti/davinci_mdio.c
+++ b/drivers/net/ethernet/ti/davinci_mdio.c
@@ -225,7 +225,7 @@ static int davinci_get_mdio_data(struct mdiobb_ctrl *ctrl)
 	return test_bit(MDIO_PIN, &reg);
 }
 
-static int davinci_mdiobb_read(struct mii_bus *bus, int phy, int reg)
+static int davinci_mdiobb_read_c22(struct mii_bus *bus, int phy, int reg)
 {
 	int ret;
 
@@ -233,7 +233,7 @@ static int davinci_mdiobb_read(struct mii_bus *bus, int phy, int reg)
 	if (ret < 0)
 		return ret;
 
-	ret = mdiobb_read(bus, phy, reg);
+	ret = mdiobb_read_c22(bus, phy, reg);
 
 	pm_runtime_mark_last_busy(bus->parent);
 	pm_runtime_put_autosuspend(bus->parent);
@@ -241,8 +241,8 @@ static int davinci_mdiobb_read(struct mii_bus *bus, int phy, int reg)
 	return ret;
 }
 
-static int davinci_mdiobb_write(struct mii_bus *bus, int phy, int reg,
-				u16 val)
+static int davinci_mdiobb_write_c22(struct mii_bus *bus, int phy, int reg,
+				    u16 val)
 {
 	int ret;
 
@@ -250,7 +250,41 @@ static int davinci_mdiobb_write(struct mii_bus *bus, int phy, int reg,
 	if (ret < 0)
 		return ret;
 
-	ret = mdiobb_write(bus, phy, reg, val);
+	ret = mdiobb_write_c22(bus, phy, reg, val);
+
+	pm_runtime_mark_last_busy(bus->parent);
+	pm_runtime_put_autosuspend(bus->parent);
+
+	return ret;
+}
+
+static int davinci_mdiobb_read_c45(struct mii_bus *bus, int phy, int devad,
+				   int reg)
+{
+	int ret;
+
+	ret = pm_runtime_resume_and_get(bus->parent);
+	if (ret < 0)
+		return ret;
+
+	ret = mdiobb_read_c45(bus, phy, devad, reg);
+
+	pm_runtime_mark_last_busy(bus->parent);
+	pm_runtime_put_autosuspend(bus->parent);
+
+	return ret;
+}
+
+static int davinci_mdiobb_write_c45(struct mii_bus *bus, int phy, int devad,
+				    int reg, u16 val)
+{
+	int ret;
+
+	ret = pm_runtime_resume_and_get(bus->parent);
+	if (ret < 0)
+		return ret;
+
+	ret = mdiobb_write_c45(bus, phy, devad, reg, val);
 
 	pm_runtime_mark_last_busy(bus->parent);
 	pm_runtime_put_autosuspend(bus->parent);
@@ -573,8 +607,10 @@ static int davinci_mdio_probe(struct platform_device *pdev)
 	data->bus->name		= dev_name(dev);
 
 	if (data->manual_mode) {
-		data->bus->read		= davinci_mdiobb_read;
-		data->bus->write	= davinci_mdiobb_write;
+		data->bus->read		= davinci_mdiobb_read_c22;
+		data->bus->write	= davinci_mdiobb_write_c22;
+		data->bus->read_c45	= davinci_mdiobb_read_c45;
+		data->bus->write_c45	= davinci_mdiobb_write_c45;
 		data->bus->reset	= davinci_mdiobb_reset;
 
 		dev_info(dev, "Configuring MDIO in manual mode\n");
diff --git a/drivers/net/mdio/mdio-bitbang.c b/drivers/net/mdio/mdio-bitbang.c
index 07609114a26b..b83932562be2 100644
--- a/drivers/net/mdio/mdio-bitbang.c
+++ b/drivers/net/mdio/mdio-bitbang.c
@@ -127,14 +127,12 @@ static void mdiobb_cmd(struct mdiobb_ctrl *ctrl, int op, u8 phy, u8 reg)
 
 /* In clause 45 mode all commands are prefixed by MDIO_ADDR to specify the
    lower 16 bits of the 21 bit address. This transfer is done identically to a
-   MDIO_WRITE except for a different code. To enable clause 45 mode or
-   MII_ADDR_C45 into the address. Theoretically clause 45 and normal devices
-   can exist on the same bus. Normal devices should ignore the MDIO_ADDR
+   MDIO_WRITE except for a different code. Theoretically clause 45 and normal
+   devices can exist on the same bus. Normal devices should ignore the MDIO_ADDR
    phase. */
-static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)
+static void mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, int dev_addr,
+			    int reg)
 {
-	unsigned int dev_addr = (addr >> 16) & 0x1F;
-	unsigned int reg = addr & 0xFFFF;
 	mdiobb_cmd(ctrl, MDIO_C45_ADDR, phy, dev_addr);
 
 	/* send the turnaround (10) */
@@ -145,21 +143,13 @@ static int mdiobb_cmd_addr(struct mdiobb_ctrl *ctrl, int phy, u32 addr)
 
 	ctrl->ops->set_mdio_dir(ctrl, 0);
 	mdiobb_get_bit(ctrl);
-
-	return dev_addr;
 }
 
-int mdiobb_read(struct mii_bus *bus, int phy, int reg)
+static int mdiobb_read_common(struct mii_bus *bus, int phy)
 {
 	struct mdiobb_ctrl *ctrl = bus->priv;
 	int ret, i;
 
-	if (reg & MII_ADDR_C45) {
-		reg = mdiobb_cmd_addr(ctrl, phy, reg);
-		mdiobb_cmd(ctrl, MDIO_C45_READ, phy, reg);
-	} else
-		mdiobb_cmd(ctrl, ctrl->op_c22_read, phy, reg);
-
 	ctrl->ops->set_mdio_dir(ctrl, 0);
 
 	/* check the turnaround bit: the PHY should be driving it to zero, if this
@@ -180,17 +170,31 @@ int mdiobb_read(struct mii_bus *bus, int phy, int reg)
 	mdiobb_get_bit(ctrl);
 	return ret;
 }
-EXPORT_SYMBOL(mdiobb_read);
 
-int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val)
+int mdiobb_read_c22(struct mii_bus *bus, int phy, int reg)
 {
 	struct mdiobb_ctrl *ctrl = bus->priv;
 
-	if (reg & MII_ADDR_C45) {
-		reg = mdiobb_cmd_addr(ctrl, phy, reg);
-		mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, reg);
-	} else
-		mdiobb_cmd(ctrl, ctrl->op_c22_write, phy, reg);
+	mdiobb_cmd(ctrl, ctrl->op_c22_read, phy, reg);
+
+	return mdiobb_read_common(bus, phy);
+}
+EXPORT_SYMBOL(mdiobb_read_c22);
+
+int mdiobb_read_c45(struct mii_bus *bus, int phy, int devad, int reg)
+{
+	struct mdiobb_ctrl *ctrl = bus->priv;
+
+	mdiobb_cmd_addr(ctrl, phy, devad, reg);
+	mdiobb_cmd(ctrl, MDIO_C45_READ, phy, reg);
+
+	return mdiobb_read_common(bus, phy);
+}
+EXPORT_SYMBOL(mdiobb_read_c45);
+
+static int mdiobb_write_common(struct mii_bus *bus, u16 val)
+{
+	struct mdiobb_ctrl *ctrl = bus->priv;
 
 	/* send the turnaround (10) */
 	mdiobb_send_bit(ctrl, 1);
@@ -202,7 +206,27 @@ int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val)
 	mdiobb_get_bit(ctrl);
 	return 0;
 }
-EXPORT_SYMBOL(mdiobb_write);
+
+int mdiobb_write_c22(struct mii_bus *bus, int phy, int reg, u16 val)
+{
+	struct mdiobb_ctrl *ctrl = bus->priv;
+
+	mdiobb_cmd(ctrl, ctrl->op_c22_write, phy, reg);
+
+	return mdiobb_write_common(bus, val);
+}
+EXPORT_SYMBOL(mdiobb_write_c22);
+
+int mdiobb_write_c45(struct mii_bus *bus, int phy, int devad, int reg, u16 val)
+{
+	struct mdiobb_ctrl *ctrl = bus->priv;
+
+	mdiobb_cmd_addr(ctrl, phy, devad, reg);
+	mdiobb_cmd(ctrl, MDIO_C45_WRITE, phy, reg);
+
+	return mdiobb_write_common(bus, val);
+}
+EXPORT_SYMBOL(mdiobb_write_c45);
 
 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
 {
@@ -214,8 +238,11 @@ struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl)
 
 	__module_get(ctrl->ops->owner);
 
-	bus->read = mdiobb_read;
-	bus->write = mdiobb_write;
+	bus->read = mdiobb_read_c22;
+	bus->write = mdiobb_write_c22;
+	bus->read_c45 = mdiobb_read_c45;
+	bus->write_c45 = mdiobb_write_c45;
+
 	bus->priv = ctrl;
 	if (!ctrl->override_op_c22) {
 		ctrl->op_c22_read = MDIO_READ;
diff --git a/include/linux/mdio-bitbang.h b/include/linux/mdio-bitbang.h
index 373630fe5c28..cffabdbce075 100644
--- a/include/linux/mdio-bitbang.h
+++ b/include/linux/mdio-bitbang.h
@@ -38,8 +38,10 @@ struct mdiobb_ctrl {
 	u8 op_c22_write;
 };
 
-int mdiobb_read(struct mii_bus *bus, int phy, int reg);
-int mdiobb_write(struct mii_bus *bus, int phy, int reg, u16 val);
+int mdiobb_read_c22(struct mii_bus *bus, int phy, int reg);
+int mdiobb_write_c22(struct mii_bus *bus, int phy, int reg, u16 val);
+int mdiobb_read_c45(struct mii_bus *bus, int devad, int phy, int reg);
+int mdiobb_write_c45(struct mii_bus *bus, int devad, int phy, int reg, u16 val);
 
 /* The returned bus is not yet registered with the phy layer. */
 struct mii_bus *alloc_mdio_bitbang(struct mdiobb_ctrl *ctrl);

-- 
2.30.2

[PATCH net-next v3 07/11] net: mdio: mvmdio: Convert XSMI bus to new API

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

The marvell MDIO driver supports two different hardware blocks. The
XSMI block is C45 only. Convert this block to the new API, and only
populate the c45 calls in the bus structure.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
 drivers/net/ethernet/marvell/mvmdio.c | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c
index ef878973b859..2d654a40af13 100644
--- a/drivers/net/ethernet/marvell/mvmdio.c
+++ b/drivers/net/ethernet/marvell/mvmdio.c
@@ -204,21 +204,17 @@ static const struct orion_mdio_ops orion_mdio_xsmi_ops = {
 	.poll_interval_max = MVMDIO_XSMI_POLL_INTERVAL_MAX,
 };
 
-static int orion_mdio_xsmi_read(struct mii_bus *bus, int mii_id,
-				int regnum)
+static int orion_mdio_xsmi_read_c45(struct mii_bus *bus, int mii_id,
+				    int dev_addr, int regnum)
 {
 	struct orion_mdio_dev *dev = bus->priv;
-	u16 dev_addr = (regnum >> 16) & GENMASK(4, 0);
 	int ret;
 
-	if (!(regnum & MII_ADDR_C45))
-		return -EOPNOTSUPP;
-
 	ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus);
 	if (ret < 0)
 		return ret;
 
-	writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG);
+	writel(regnum, dev->regs + MVMDIO_XSMI_ADDR_REG);
 	writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) |
 	       (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) |
 	       MVMDIO_XSMI_READ_OPERATION,
@@ -237,21 +233,17 @@ static int orion_mdio_xsmi_read(struct mii_bus *bus, int mii_id,
 	return readl(dev->regs + MVMDIO_XSMI_MGNT_REG) & GENMASK(15, 0);
 }
 
-static int orion_mdio_xsmi_write(struct mii_bus *bus, int mii_id,
-				int regnum, u16 value)
+static int orion_mdio_xsmi_write_c45(struct mii_bus *bus, int mii_id,
+				     int dev_addr, int regnum, u16 value)
 {
 	struct orion_mdio_dev *dev = bus->priv;
-	u16 dev_addr = (regnum >> 16) & GENMASK(4, 0);
 	int ret;
 
-	if (!(regnum & MII_ADDR_C45))
-		return -EOPNOTSUPP;
-
 	ret = orion_mdio_wait_ready(&orion_mdio_xsmi_ops, bus);
 	if (ret < 0)
 		return ret;
 
-	writel(regnum & GENMASK(15, 0), dev->regs + MVMDIO_XSMI_ADDR_REG);
+	writel(regnum, dev->regs + MVMDIO_XSMI_ADDR_REG);
 	writel((mii_id << MVMDIO_XSMI_PHYADDR_SHIFT) |
 	       (dev_addr << MVMDIO_XSMI_DEVADDR_SHIFT) |
 	       MVMDIO_XSMI_WRITE_OPERATION | value,
@@ -302,8 +294,8 @@ static int orion_mdio_probe(struct platform_device *pdev)
 		bus->write = orion_mdio_smi_write;
 		break;
 	case BUS_TYPE_XSMI:
-		bus->read = orion_mdio_xsmi_read;
-		bus->write = orion_mdio_xsmi_write;
+		bus->read_c45 = orion_mdio_xsmi_read_c45;
+		bus->write_c45 = orion_mdio_xsmi_write_c45;
 		break;
 	}
 

-- 
2.30.2

[PATCH net-next v3 08/11] net: mdio: xgmac_mdio: Separate C22 and C45 transactions

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

The xgmac 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.

While at it, remove the misleading comment. According to Vladimir
Oltean:
 - miimcom is a register accessed by fsl_pq_mdio.c, not by xgmac_mdio.c
 - "device dev" doesn't really refer to anything (maybe "dev_addr").
 - I don't understand what is meant by the comment "All PHY
   configuration has to be done through the TSEC1 MIIM regs". Or rather
   said, I think I understand, but it is irrelevant to the driver for 2
   reasons:
    * TSEC devices use the fsl_pq_mdio.c driver, not this one
    * It doesn't matter to this driver whose TSEC registers are used for
      MDIO access. The driver just works with the registers it's given,
      which is a concern for the device tree.
 - barring the above, the rest just describes the MDIO bus API, which is
   superfluous

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Tested-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
v2:
 - [al] Move the masking of regnum into the variable declarations
 - [al] Remove a couple of blank lines
v3:
 - [mw] Remove comment
---
 drivers/net/ethernet/freescale/xgmac_mdio.c | 148 ++++++++++++++++++++--------
 1 file changed, 108 insertions(+), 40 deletions(-)

diff --git a/drivers/net/ethernet/freescale/xgmac_mdio.c b/drivers/net/ethernet/freescale/xgmac_mdio.c
index d7d39a58cd80..8b5a4cd8ff08 100644
--- a/drivers/net/ethernet/freescale/xgmac_mdio.c
+++ b/drivers/net/ethernet/freescale/xgmac_mdio.c
@@ -128,30 +128,49 @@ static int xgmac_wait_until_done(struct device *dev,
 	return 0;
 }
 
-/*
- * Write value to the PHY for this device to the register at regnum,waiting
- * until the write is done before it returns.  All PHY configuration has to be
- * done through the TSEC1 MIIM regs.
- */
-static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 value)
+static int xgmac_mdio_write_c22(struct mii_bus *bus, int phy_id, int regnum,
+				u16 value)
 {
 	struct mdio_fsl_priv *priv = (struct mdio_fsl_priv *)bus->priv;
 	struct tgec_mdio_controller __iomem *regs = priv->mdio_base;
-	uint16_t dev_addr;
+	bool endian = priv->is_little_endian;
+	u16 dev_addr = regnum & 0x1f;
 	u32 mdio_ctl, mdio_stat;
 	int ret;
+
+	mdio_stat = xgmac_read32(&regs->mdio_stat, endian);
+	mdio_stat &= ~MDIO_STAT_ENC;
+	xgmac_write32(mdio_stat, &regs->mdio_stat, endian);
+
+	ret = xgmac_wait_until_free(&bus->dev, regs, endian);
+	if (ret)
+		return ret;
+
+	/* Set the port and dev addr */
+	mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr);
+	xgmac_write32(mdio_ctl, &regs->mdio_ctl, endian);
+
+	/* Write the value to the register */
+	xgmac_write32(MDIO_DATA(value), &regs->mdio_data, endian);
+
+	ret = xgmac_wait_until_done(&bus->dev, regs, endian);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int xgmac_mdio_write_c45(struct mii_bus *bus, int phy_id, int dev_addr,
+				int regnum, u16 value)
+{
+	struct mdio_fsl_priv *priv = (struct mdio_fsl_priv *)bus->priv;
+	struct tgec_mdio_controller __iomem *regs = priv->mdio_base;
 	bool endian = priv->is_little_endian;
+	u32 mdio_ctl, mdio_stat;
+	int ret;
 
 	mdio_stat = xgmac_read32(&regs->mdio_stat, endian);
-	if (regnum & MII_ADDR_C45) {
-		/* Clause 45 (ie 10G) */
-		dev_addr = (regnum >> 16) & 0x1f;
-		mdio_stat |= MDIO_STAT_ENC;
-	} else {
-		/* Clause 22 (ie 1G) */
-		dev_addr = regnum & 0x1f;
-		mdio_stat &= ~MDIO_STAT_ENC;
-	}
+	mdio_stat |= MDIO_STAT_ENC;
 
 	xgmac_write32(mdio_stat, &regs->mdio_stat, endian);
 
@@ -164,13 +183,11 @@ static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 val
 	xgmac_write32(mdio_ctl, &regs->mdio_ctl, endian);
 
 	/* Set the register address */
-	if (regnum & MII_ADDR_C45) {
-		xgmac_write32(regnum & 0xffff, &regs->mdio_addr, endian);
+	xgmac_write32(regnum & 0xffff, &regs->mdio_addr, endian);
 
-		ret = xgmac_wait_until_free(&bus->dev, regs, endian);
-		if (ret)
-			return ret;
-	}
+	ret = xgmac_wait_until_free(&bus->dev, regs, endian);
+	if (ret)
+		return ret;
 
 	/* Write the value to the register */
 	xgmac_write32(MDIO_DATA(value), &regs->mdio_data, endian);
@@ -182,31 +199,82 @@ static int xgmac_mdio_write(struct mii_bus *bus, int phy_id, int regnum, u16 val
 	return 0;
 }
 
-/*
- * Reads from register regnum in the PHY for device dev, returning the value.
+/* Reads from register regnum in the PHY for device dev, returning the value.
  * Clears miimcom first.  All PHY configuration has to be done through the
  * TSEC1 MIIM regs.
  */
-static int xgmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
+static int xgmac_mdio_read_c22(struct mii_bus *bus, int phy_id, int regnum)
 {
 	struct mdio_fsl_priv *priv = (struct mdio_fsl_priv *)bus->priv;
 	struct tgec_mdio_controller __iomem *regs = priv->mdio_base;
+	bool endian = priv->is_little_endian;
+	u16 dev_addr = regnum & 0x1f;
 	unsigned long flags;
-	uint16_t dev_addr;
 	uint32_t mdio_stat;
 	uint32_t mdio_ctl;
 	int ret;
-	bool endian = priv->is_little_endian;
 
 	mdio_stat = xgmac_read32(&regs->mdio_stat, endian);
-	if (regnum & MII_ADDR_C45) {
-		dev_addr = (regnum >> 16) & 0x1f;
-		mdio_stat |= MDIO_STAT_ENC;
+	mdio_stat &= ~MDIO_STAT_ENC;
+	xgmac_write32(mdio_stat, &regs->mdio_stat, endian);
+
+	ret = xgmac_wait_until_free(&bus->dev, regs, endian);
+	if (ret)
+		return ret;
+
+	/* Set the Port and Device Addrs */
+	mdio_ctl = MDIO_CTL_PORT_ADDR(phy_id) | MDIO_CTL_DEV_ADDR(dev_addr);
+	xgmac_write32(mdio_ctl, &regs->mdio_ctl, endian);
+
+	if (priv->has_a009885)
+		/* Once the operation completes, i.e. MDIO_STAT_BSY clears, we
+		 * must read back the data register within 16 MDC cycles.
+		 */
+		local_irq_save(flags);
+
+	/* Initiate the read */
+	xgmac_write32(mdio_ctl | MDIO_CTL_READ, &regs->mdio_ctl, endian);
+
+	ret = xgmac_wait_until_done(&bus->dev, regs, endian);
+	if (ret)
+		goto irq_restore;
+
+	/* Return all Fs if nothing was there */
+	if ((xgmac_read32(&regs->mdio_stat, endian) & MDIO_STAT_RD_ER) &&
+	    !priv->has_a011043) {
+		dev_dbg(&bus->dev,
+			"Error while reading PHY%d reg at %d.%d\n",
+			phy_id, dev_addr, regnum);
+		ret = 0xffff;
 	} else {
-		dev_addr = regnum & 0x1f;
-		mdio_stat &= ~MDIO_STAT_ENC;
+		ret = xgmac_read32(&regs->mdio_data, endian) & 0xffff;
+		dev_dbg(&bus->dev, "read %04x\n", ret);
 	}
 
+irq_restore:
+	if (priv->has_a009885)
+		local_irq_restore(flags);
+
+	return ret;
+}
+
+/* Reads from register regnum in the PHY for device dev, returning the value.
+ * Clears miimcom first.  All PHY configuration has to be done through the
+ * TSEC1 MIIM regs.
+ */
+static int xgmac_mdio_read_c45(struct mii_bus *bus, int phy_id, int dev_addr,
+			       int regnum)
+{
+	struct mdio_fsl_priv *priv = (struct mdio_fsl_priv *)bus->priv;
+	struct tgec_mdio_controller __iomem *regs = priv->mdio_base;
+	bool endian = priv->is_little_endian;
+	u32 mdio_stat, mdio_ctl;
+	unsigned long flags;
+	int ret;
+
+	mdio_stat = xgmac_read32(&regs->mdio_stat, endian);
+	mdio_stat |= MDIO_STAT_ENC;
+
 	xgmac_write32(mdio_stat, &regs->mdio_stat, endian);
 
 	ret = xgmac_wait_until_free(&bus->dev, regs, endian);
@@ -218,13 +286,11 @@ static int xgmac_mdio_read(struct mii_bus *bus, int phy_id, int regnum)
 	xgmac_write32(mdio_ctl, &regs->mdio_ctl, endian);
 
 	/* Set the register address */
-	if (regnum & MII_ADDR_C45) {
-		xgmac_write32(regnum & 0xffff, &regs->mdio_addr, endian);
+	xgmac_write32(regnum & 0xffff, &regs->mdio_addr, endian);
 
-		ret = xgmac_wait_until_free(&bus->dev, regs, endian);
-		if (ret)
-			return ret;
-	}
+	ret = xgmac_wait_until_free(&bus->dev, regs, endian);
+	if (ret)
+		return ret;
 
 	if (priv->has_a009885)
 		/* Once the operation completes, i.e. MDIO_STAT_BSY clears, we
@@ -326,8 +392,10 @@ static int xgmac_mdio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	bus->name = "Freescale XGMAC MDIO Bus";
-	bus->read = xgmac_mdio_read;
-	bus->write = xgmac_mdio_write;
+	bus->read = xgmac_mdio_read_c22;
+	bus->write = xgmac_mdio_write_c22;
+	bus->read_c45 = xgmac_mdio_read_c45;
+	bus->write_c45 = xgmac_mdio_write_c45;
 	bus->parent = &pdev->dev;
 	bus->probe_capabilities = MDIOBUS_C22_C45;
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%pa", &res->start);

-- 
2.30.2

[PATCH net-next v3 09/11] net: fec: Separate C22 and C45 transactions

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

The fec 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@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Wei Fang <wei.fang@nxp.com>
---
v2:
 - [al] Fixup some indentation
v3:
 - [mw] More concise subject
---
 drivers/net/ethernet/freescale/fec_main.c | 153 ++++++++++++++++++++----------
 1 file changed, 103 insertions(+), 50 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index 644f3c963730..e6238e53940d 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1987,47 +1987,74 @@ static int fec_enet_mdio_wait(struct fec_enet_private *fep)
 	return ret;
 }
 
-static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
+static int fec_enet_mdio_read_c22(struct mii_bus *bus, int mii_id, int regnum)
 {
 	struct fec_enet_private *fep = bus->priv;
 	struct device *dev = &fep->pdev->dev;
 	int ret = 0, frame_start, frame_addr, frame_op;
-	bool is_c45 = !!(regnum & MII_ADDR_C45);
 
 	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0)
 		return ret;
 
-	if (is_c45) {
-		frame_start = FEC_MMFR_ST_C45;
+	/* C22 read */
+	frame_op = FEC_MMFR_OP_READ;
+	frame_start = FEC_MMFR_ST;
+	frame_addr = regnum;
 
-		/* write address */
-		frame_addr = (regnum >> 16);
-		writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
-		       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
-		       FEC_MMFR_TA | (regnum & 0xFFFF),
-		       fep->hwp + FEC_MII_DATA);
+	/* start a read op */
+	writel(frame_start | frame_op |
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
+	       FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
 
-		/* wait for end of transfer */
-		ret = fec_enet_mdio_wait(fep);
-		if (ret) {
-			netdev_err(fep->netdev, "MDIO address write timeout\n");
-			goto out;
-		}
+	/* wait for end of transfer */
+	ret = fec_enet_mdio_wait(fep);
+	if (ret) {
+		netdev_err(fep->netdev, "MDIO read timeout\n");
+		goto out;
+	}
 
-		frame_op = FEC_MMFR_OP_READ_C45;
+	ret = FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA));
 
-	} else {
-		/* C22 read */
-		frame_op = FEC_MMFR_OP_READ;
-		frame_start = FEC_MMFR_ST;
-		frame_addr = regnum;
+out:
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
+}
+
+static int fec_enet_mdio_read_c45(struct mii_bus *bus, int mii_id,
+				  int devad, int regnum)
+{
+	struct fec_enet_private *fep = bus->priv;
+	struct device *dev = &fep->pdev->dev;
+	int ret = 0, frame_start, frame_op;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		return ret;
+
+	frame_start = FEC_MMFR_ST_C45;
+
+	/* write address */
+	writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) |
+	       FEC_MMFR_TA | (regnum & 0xFFFF),
+	       fep->hwp + FEC_MII_DATA);
+
+	/* wait for end of transfer */
+	ret = fec_enet_mdio_wait(fep);
+	if (ret) {
+		netdev_err(fep->netdev, "MDIO address write timeout\n");
+		goto out;
 	}
 
+	frame_op = FEC_MMFR_OP_READ_C45;
+
 	/* start a read op */
 	writel(frame_start | frame_op |
-		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
-		FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) |
+	       FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
 
 	/* wait for end of transfer */
 	ret = fec_enet_mdio_wait(fep);
@@ -2045,45 +2072,69 @@ static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
 	return ret;
 }
 
-static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
-			   u16 value)
+static int fec_enet_mdio_write_c22(struct mii_bus *bus, int mii_id, int regnum,
+				   u16 value)
 {
 	struct fec_enet_private *fep = bus->priv;
 	struct device *dev = &fep->pdev->dev;
 	int ret, frame_start, frame_addr;
-	bool is_c45 = !!(regnum & MII_ADDR_C45);
 
 	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0)
 		return ret;
 
-	if (is_c45) {
-		frame_start = FEC_MMFR_ST_C45;
+	/* C22 write */
+	frame_start = FEC_MMFR_ST;
+	frame_addr = regnum;
 
-		/* write address */
-		frame_addr = (regnum >> 16);
-		writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
-		       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
-		       FEC_MMFR_TA | (regnum & 0xFFFF),
-		       fep->hwp + FEC_MII_DATA);
+	/* start a write op */
+	writel(frame_start | FEC_MMFR_OP_WRITE |
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
+	       FEC_MMFR_TA | FEC_MMFR_DATA(value),
+	       fep->hwp + FEC_MII_DATA);
 
-		/* wait for end of transfer */
-		ret = fec_enet_mdio_wait(fep);
-		if (ret) {
-			netdev_err(fep->netdev, "MDIO address write timeout\n");
-			goto out;
-		}
-	} else {
-		/* C22 write */
-		frame_start = FEC_MMFR_ST;
-		frame_addr = regnum;
+	/* wait for end of transfer */
+	ret = fec_enet_mdio_wait(fep);
+	if (ret)
+		netdev_err(fep->netdev, "MDIO write timeout\n");
+
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_put_autosuspend(dev);
+
+	return ret;
+}
+
+static int fec_enet_mdio_write_c45(struct mii_bus *bus, int mii_id,
+				   int devad, int regnum, u16 value)
+{
+	struct fec_enet_private *fep = bus->priv;
+	struct device *dev = &fep->pdev->dev;
+	int ret, frame_start;
+
+	ret = pm_runtime_resume_and_get(dev);
+	if (ret < 0)
+		return ret;
+
+	frame_start = FEC_MMFR_ST_C45;
+
+	/* write address */
+	writel(frame_start | FEC_MMFR_OP_ADDR_WRITE |
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) |
+	       FEC_MMFR_TA | (regnum & 0xFFFF),
+	       fep->hwp + FEC_MII_DATA);
+
+	/* wait for end of transfer */
+	ret = fec_enet_mdio_wait(fep);
+	if (ret) {
+		netdev_err(fep->netdev, "MDIO address write timeout\n");
+		goto out;
 	}
 
 	/* start a write op */
 	writel(frame_start | FEC_MMFR_OP_WRITE |
-		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(frame_addr) |
-		FEC_MMFR_TA | FEC_MMFR_DATA(value),
-		fep->hwp + FEC_MII_DATA);
+	       FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(devad) |
+	       FEC_MMFR_TA | FEC_MMFR_DATA(value),
+	       fep->hwp + FEC_MII_DATA);
 
 	/* wait for end of transfer */
 	ret = fec_enet_mdio_wait(fep);
@@ -2381,8 +2432,10 @@ static int fec_enet_mii_init(struct platform_device *pdev)
 	}
 
 	fep->mii_bus->name = "fec_enet_mii_bus";
-	fep->mii_bus->read = fec_enet_mdio_read;
-	fep->mii_bus->write = fec_enet_mdio_write;
+	fep->mii_bus->read = fec_enet_mdio_read_c22;
+	fep->mii_bus->write = fec_enet_mdio_write_c22;
+	fep->mii_bus->read_c45 = fec_enet_mdio_read_c45;
+	fep->mii_bus->write_c45 = fec_enet_mdio_write_c45;
 	snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
 		pdev->name, fep->dev_id + 1);
 	fep->mii_bus->priv = fep;

-- 
2.30.2

[PATCH net-next v3 10/11] net: mdio: add mdiobus_c45_read/write_nested helpers

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

Some DSA devices pass through PHY access to the MDIO bus the switch is
on. Add C45 versions of the current C22 helpers for nested accesses to
MDIO busses, so that C22 and C45 can be separated in these DSA
drivers.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
---
v2:
 - [al] new patch
---
 drivers/net/phy/mdio_bus.c | 55 ++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mdio.h       |  4 ++++
 2 files changed, 59 insertions(+)

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 522cbe6a0b23..902e1c88ef58 100644
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -1008,6 +1008,33 @@ int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum)
 }
 EXPORT_SYMBOL(mdiobus_c45_read);
 
+/**
+ * mdiobus_c45_read_nested - Nested version of the mdiobus_c45_read function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to read
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
+			    u32 regnum)
+{
+	int retval;
+
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+	retval = __mdiobus_c45_read(bus, addr, devad, regnum);
+	mutex_unlock(&bus->mdio_lock);
+
+	return retval;
+}
+EXPORT_SYMBOL(mdiobus_c45_read_nested);
+
 /**
  * mdiobus_write_nested - Nested version of the mdiobus_write function
  * @bus: the mii_bus struct
@@ -1082,6 +1109,34 @@ int mdiobus_c45_write(struct mii_bus *bus, int addr, int devad, u32 regnum,
 }
 EXPORT_SYMBOL(mdiobus_c45_write);
 
+/**
+ * mdiobus_c45_write_nested - Nested version of the mdiobus_c45_write function
+ * @bus: the mii_bus struct
+ * @addr: the phy address
+ * @devad: device address to read
+ * @regnum: register number to write
+ * @val: value to write to @regnum
+ *
+ * In case of nested MDIO bus access avoid lockdep false positives by
+ * using mutex_lock_nested().
+ *
+ * NOTE: MUST NOT be called from interrupt context,
+ * because the bus read/write functions may wait for an interrupt
+ * to conclude the operation.
+ */
+int mdiobus_c45_write_nested(struct mii_bus *bus, int addr, int devad,
+			     u32 regnum, u16 val)
+{
+	int err;
+
+	mutex_lock_nested(&bus->mdio_lock, MDIO_MUTEX_NESTED);
+	err = __mdiobus_c45_write(bus, addr, devad, regnum, val);
+	mutex_unlock(&bus->mdio_lock);
+
+	return err;
+}
+EXPORT_SYMBOL(mdiobus_c45_write_nested);
+
 /**
  * mdiobus_modify - Convenience function for modifying a given mdio device
  *	register
diff --git a/include/linux/mdio.h b/include/linux/mdio.h
index 97b49765e8b5..220f3ca8702d 100644
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -425,10 +425,14 @@ int mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
 			   u16 mask, u16 set);
 int __mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
 int mdiobus_c45_read(struct mii_bus *bus, int addr, int devad, u32 regnum);
+int mdiobus_c45_read_nested(struct mii_bus *bus, int addr, int devad,
+			     u32 regnum);
 int __mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 			u16 val);
 int mdiobus_c45_write(struct mii_bus *bus, int addr,  int devad, u32 regnum,
 		      u16 val);
+int mdiobus_c45_write_nested(struct mii_bus *bus, int addr,  int devad,
+			     u32 regnum, u16 val);
 int mdiobus_c45_modify(struct mii_bus *bus, int addr, int devad, u32 regnum,
 		       u16 mask, u16 set);
 

-- 
2.30.2

[PATCH net-next v3 11/11] net: dsa: mv88e6xxx: Separate C22 and C45 transactions

[Michael Walle]

From: Andrew Lunn <andrew@lunn.ch>

The global2 SMI 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. Update the SERDES
code to make use of these new accessors.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
 drivers/net/dsa/mv88e6xxx/chip.c    | 175 ++++++++++++++++++++++++++----------
 drivers/net/dsa/mv88e6xxx/chip.h    |   7 ++
 drivers/net/dsa/mv88e6xxx/global2.c |  66 ++++++++------
 drivers/net/dsa/mv88e6xxx/global2.h |  18 ++--
 drivers/net/dsa/mv88e6xxx/phy.c     |  32 +++++++
 drivers/net/dsa/mv88e6xxx/phy.h     |   4 +
 drivers/net/dsa/mv88e6xxx/serdes.c  |   8 +-
 7 files changed, 225 insertions(+), 85 deletions(-)

diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 242b8b325504..0ff9cd0be217 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -3884,6 +3884,24 @@ static int mv88e6xxx_mdio_read(struct mii_bus *bus, int phy, int reg)
 	return err ? err : val;
 }
 
+static int mv88e6xxx_mdio_read_c45(struct mii_bus *bus, int phy, int devad,
+				   int reg)
+{
+	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	struct mv88e6xxx_chip *chip = mdio_bus->chip;
+	u16 val;
+	int err;
+
+	if (!chip->info->ops->phy_read_c45)
+		return -EOPNOTSUPP;
+
+	mv88e6xxx_reg_lock(chip);
+	err = chip->info->ops->phy_read_c45(chip, bus, phy, devad, reg, &val);
+	mv88e6xxx_reg_unlock(chip);
+
+	return err ? err : val;
+}
+
 static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 {
 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
@@ -3900,6 +3918,23 @@ static int mv88e6xxx_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 	return err;
 }
 
+static int mv88e6xxx_mdio_write_c45(struct mii_bus *bus, int phy, int devad,
+				    int reg, u16 val)
+{
+	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	struct mv88e6xxx_chip *chip = mdio_bus->chip;
+	int err;
+
+	if (!chip->info->ops->phy_write_c45)
+		return -EOPNOTSUPP;
+
+	mv88e6xxx_reg_lock(chip);
+	err = chip->info->ops->phy_write_c45(chip, bus, phy, devad, reg, val);
+	mv88e6xxx_reg_unlock(chip);
+
+	return err;
+}
+
 static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
 				   struct device_node *np,
 				   bool external)
@@ -3938,6 +3973,8 @@ static int mv88e6xxx_mdio_register(struct mv88e6xxx_chip *chip,
 
 	bus->read = mv88e6xxx_mdio_read;
 	bus->write = mv88e6xxx_mdio_write;
+	bus->read_c45 = mv88e6xxx_mdio_read_c45;
+	bus->write_c45 = mv88e6xxx_mdio_write_c45;
 	bus->parent = chip->dev;
 
 	if (!external) {
@@ -4149,8 +4186,10 @@ static const struct mv88e6xxx_ops mv88e6097_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6185_port_sync_link,
 	.port_set_speed_duplex = mv88e6185_port_set_speed_duplex,
@@ -4198,8 +4237,10 @@ static const struct mv88e6xxx_ops mv88e6123_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_speed_duplex = mv88e6185_port_set_speed_duplex,
@@ -4279,8 +4320,10 @@ static const struct mv88e6xxx_ops mv88e6141_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -4343,8 +4386,10 @@ static const struct mv88e6xxx_ops mv88e6161_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_speed_duplex = mv88e6185_port_set_speed_duplex,
@@ -4426,8 +4471,10 @@ static const struct mv88e6xxx_ops mv88e6171_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4472,8 +4519,10 @@ static const struct mv88e6xxx_ops mv88e6172_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4527,8 +4576,10 @@ static const struct mv88e6xxx_ops mv88e6175_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4573,8 +4624,10 @@ static const struct mv88e6xxx_ops mv88e6176_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4673,8 +4726,10 @@ static const struct mv88e6xxx_ops mv88e6190_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -4736,8 +4791,10 @@ static const struct mv88e6xxx_ops mv88e6190x_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -4799,8 +4856,10 @@ static const struct mv88e6xxx_ops mv88e6191_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -4862,8 +4921,10 @@ static const struct mv88e6xxx_ops mv88e6240_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4925,8 +4986,10 @@ static const struct mv88e6xxx_ops mv88e6250_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -4964,8 +5027,10 @@ static const struct mv88e6xxx_ops mv88e6290_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -5029,8 +5094,10 @@ static const struct mv88e6xxx_ops mv88e6320_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6320_port_set_rgmii_delay,
@@ -5074,8 +5141,10 @@ static const struct mv88e6xxx_ops mv88e6321_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6320_port_set_rgmii_delay,
@@ -5117,8 +5186,10 @@ static const struct mv88e6xxx_ops mv88e6341_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -5183,8 +5254,10 @@ static const struct mv88e6xxx_ops mv88e6350_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -5227,8 +5300,10 @@ static const struct mv88e6xxx_ops mv88e6351_ops = {
 	.ip_pri_map = mv88e6085_g1_ip_pri_map,
 	.irl_init_all = mv88e6352_g2_irl_init_all,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -5275,8 +5350,10 @@ static const struct mv88e6xxx_ops mv88e6352_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom16,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom16,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6352_port_set_rgmii_delay,
@@ -5340,8 +5417,10 @@ static const struct mv88e6xxx_ops mv88e6390_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -5407,8 +5486,10 @@ static const struct mv88e6xxx_ops mv88e6390x_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
@@ -5473,8 +5554,10 @@ static const struct mv88e6xxx_ops mv88e6393x_ops = {
 	.get_eeprom = mv88e6xxx_g2_get_eeprom8,
 	.set_eeprom = mv88e6xxx_g2_set_eeprom8,
 	.set_switch_mac = mv88e6xxx_g2_set_switch_mac,
-	.phy_read = mv88e6xxx_g2_smi_phy_read,
-	.phy_write = mv88e6xxx_g2_smi_phy_write,
+	.phy_read = mv88e6xxx_g2_smi_phy_read_c22,
+	.phy_write = mv88e6xxx_g2_smi_phy_write_c22,
+	.phy_read_c45 = mv88e6xxx_g2_smi_phy_read_c45,
+	.phy_write_c45 = mv88e6xxx_g2_smi_phy_write_c45,
 	.port_set_link = mv88e6xxx_port_set_link,
 	.port_sync_link = mv88e6xxx_port_sync_link,
 	.port_set_rgmii_delay = mv88e6390_port_set_rgmii_delay,
diff --git a/drivers/net/dsa/mv88e6xxx/chip.h b/drivers/net/dsa/mv88e6xxx/chip.h
index e693154cf803..751bede49942 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.h
+++ b/drivers/net/dsa/mv88e6xxx/chip.h
@@ -451,6 +451,13 @@ struct mv88e6xxx_ops {
 			 struct mii_bus *bus,
 			 int addr, int reg, u16 val);
 
+	int (*phy_read_c45)(struct mv88e6xxx_chip *chip,
+			    struct mii_bus *bus,
+			    int addr, int devad, int reg, u16 *val);
+	int (*phy_write_c45)(struct mv88e6xxx_chip *chip,
+			     struct mii_bus *bus,
+			     int addr, int devad, int reg, u16 val);
+
 	/* Priority Override Table operations */
 	int (*pot_clear)(struct mv88e6xxx_chip *chip);
 
diff --git a/drivers/net/dsa/mv88e6xxx/global2.c b/drivers/net/dsa/mv88e6xxx/global2.c
index fa65ecd9cb85..ed3b2f88e783 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.c
+++ b/drivers/net/dsa/mv88e6xxx/global2.c
@@ -739,20 +739,18 @@ static int mv88e6xxx_g2_smi_phy_read_data_c45(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_g2_read(chip, MV88E6XXX_G2_SMI_PHY_DATA, data);
 }
 
-static int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
-					 bool external, int port, int reg,
-					 u16 *data)
+static int _mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
+					  bool external, int port, int devad,
+					  int reg, u16 *data)
 {
-	int dev = (reg >> 16) & 0x1f;
-	int addr = reg & 0xffff;
 	int err;
 
-	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, dev,
-						  addr);
+	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, devad,
+						  reg);
 	if (err)
 		return err;
 
-	return mv88e6xxx_g2_smi_phy_read_data_c45(chip, external, port, dev,
+	return mv88e6xxx_g2_smi_phy_read_data_c45(chip, external, port, devad,
 						  data);
 }
 
@@ -771,51 +769,65 @@ static int mv88e6xxx_g2_smi_phy_write_data_c45(struct mv88e6xxx_chip *chip,
 	return mv88e6xxx_g2_smi_phy_access_c45(chip, external, op, port, dev);
 }
 
-static int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
-					  bool external, int port, int reg,
-					  u16 data)
+static int _mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
+					   bool external, int port, int devad,
+					   int reg, u16 data)
 {
-	int dev = (reg >> 16) & 0x1f;
-	int addr = reg & 0xffff;
 	int err;
 
-	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, dev,
-						  addr);
+	err = mv88e6xxx_g2_smi_phy_write_addr_c45(chip, external, port, devad,
+						  reg);
 	if (err)
 		return err;
 
-	return mv88e6xxx_g2_smi_phy_write_data_c45(chip, external, port, dev,
+	return mv88e6xxx_g2_smi_phy_write_data_c45(chip, external, port, devad,
 						   data);
 }
 
-int mv88e6xxx_g2_smi_phy_read(struct mv88e6xxx_chip *chip, struct mii_bus *bus,
-			      int addr, int reg, u16 *val)
+int mv88e6xxx_g2_smi_phy_read_c22(struct mv88e6xxx_chip *chip,
+				  struct mii_bus *bus,
+				  int addr, int reg, u16 *val)
 {
 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
 	bool external = mdio_bus->external;
 
-	if (reg & MII_ADDR_C45)
-		return mv88e6xxx_g2_smi_phy_read_c45(chip, external, addr, reg,
-						     val);
-
 	return mv88e6xxx_g2_smi_phy_read_data_c22(chip, external, addr, reg,
 						  val);
 }
 
-int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip, struct mii_bus *bus,
-			       int addr, int reg, u16 val)
+int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
+				  struct mii_bus *bus, int addr, int devad,
+				  int reg, u16 *val)
 {
 	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
 	bool external = mdio_bus->external;
 
-	if (reg & MII_ADDR_C45)
-		return mv88e6xxx_g2_smi_phy_write_c45(chip, external, addr, reg,
-						      val);
+	return _mv88e6xxx_g2_smi_phy_read_c45(chip, external, addr, devad, reg,
+					      val);
+}
+
+int mv88e6xxx_g2_smi_phy_write_c22(struct mv88e6xxx_chip *chip,
+				   struct mii_bus *bus, int addr, int reg,
+				   u16 val)
+{
+	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	bool external = mdio_bus->external;
 
 	return mv88e6xxx_g2_smi_phy_write_data_c22(chip, external, addr, reg,
 						   val);
 }
 
+int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
+				   struct mii_bus *bus, int addr, int devad,
+				   int reg, u16 val)
+{
+	struct mv88e6xxx_mdio_bus *mdio_bus = bus->priv;
+	bool external = mdio_bus->external;
+
+	return _mv88e6xxx_g2_smi_phy_write_c45(chip, external, addr, devad, reg,
+					       val);
+}
+
 /* Offset 0x1B: Watchdog Control */
 static int mv88e6097_watchdog_action(struct mv88e6xxx_chip *chip, int irq)
 {
diff --git a/drivers/net/dsa/mv88e6xxx/global2.h b/drivers/net/dsa/mv88e6xxx/global2.h
index 7536b8b0ad01..e973114d6890 100644
--- a/drivers/net/dsa/mv88e6xxx/global2.h
+++ b/drivers/net/dsa/mv88e6xxx/global2.h
@@ -314,12 +314,18 @@ int mv88e6xxx_g2_wait_bit(struct mv88e6xxx_chip *chip, int reg,
 int mv88e6352_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port);
 int mv88e6390_g2_irl_init_all(struct mv88e6xxx_chip *chip, int port);
 
-int mv88e6xxx_g2_smi_phy_read(struct mv88e6xxx_chip *chip,
-			      struct mii_bus *bus,
-			      int addr, int reg, u16 *val);
-int mv88e6xxx_g2_smi_phy_write(struct mv88e6xxx_chip *chip,
-			       struct mii_bus *bus,
-			       int addr, int reg, u16 val);
+int mv88e6xxx_g2_smi_phy_read_c22(struct mv88e6xxx_chip *chip,
+				  struct mii_bus *bus,
+				  int addr, int reg, u16 *val);
+int mv88e6xxx_g2_smi_phy_write_c22(struct mv88e6xxx_chip *chip,
+				   struct mii_bus *bus,
+				   int addr, int reg, u16 val);
+int mv88e6xxx_g2_smi_phy_read_c45(struct mv88e6xxx_chip *chip,
+				  struct mii_bus *bus,
+				  int addr, int devad, int reg, u16 *val);
+int mv88e6xxx_g2_smi_phy_write_c45(struct mv88e6xxx_chip *chip,
+				   struct mii_bus *bus,
+				   int addr, int devad, int reg, u16 val);
 int mv88e6xxx_g2_set_switch_mac(struct mv88e6xxx_chip *chip, u8 *addr);
 
 int mv88e6xxx_g2_get_eeprom8(struct mv88e6xxx_chip *chip,
diff --git a/drivers/net/dsa/mv88e6xxx/phy.c b/drivers/net/dsa/mv88e6xxx/phy.c
index 252b5b3a3efe..8bb88b3d900d 100644
--- a/drivers/net/dsa/mv88e6xxx/phy.c
+++ b/drivers/net/dsa/mv88e6xxx/phy.c
@@ -55,6 +55,38 @@ int mv88e6xxx_phy_write(struct mv88e6xxx_chip *chip, int phy, int reg, u16 val)
 	return chip->info->ops->phy_write(chip, bus, addr, reg, val);
 }
 
+int mv88e6xxx_phy_read_c45(struct mv88e6xxx_chip *chip, int phy, int devad,
+			   int reg, u16 *val)
+{
+	int addr = phy; /* PHY devices addresses start at 0x0 */
+	struct mii_bus *bus;
+
+	bus = mv88e6xxx_default_mdio_bus(chip);
+	if (!bus)
+		return -EOPNOTSUPP;
+
+	if (!chip->info->ops->phy_read_c45)
+		return -EOPNOTSUPP;
+
+	return chip->info->ops->phy_read_c45(chip, bus, addr, devad, reg, val);
+}
+
+int mv88e6xxx_phy_write_c45(struct mv88e6xxx_chip *chip, int phy, int devad,
+			    int reg, u16 val)
+{
+	int addr = phy; /* PHY devices addresses start at 0x0 */
+	struct mii_bus *bus;
+
+	bus = mv88e6xxx_default_mdio_bus(chip);
+	if (!bus)
+		return -EOPNOTSUPP;
+
+	if (!chip->info->ops->phy_write_c45)
+		return -EOPNOTSUPP;
+
+	return chip->info->ops->phy_write_c45(chip, bus, addr, devad, reg, val);
+}
+
 static int mv88e6xxx_phy_page_get(struct mv88e6xxx_chip *chip, int phy, u8 page)
 {
 	return mv88e6xxx_phy_write(chip, phy, MV88E6XXX_PHY_PAGE, page);
diff --git a/drivers/net/dsa/mv88e6xxx/phy.h b/drivers/net/dsa/mv88e6xxx/phy.h
index 05ea0d546969..5f47722364cc 100644
--- a/drivers/net/dsa/mv88e6xxx/phy.h
+++ b/drivers/net/dsa/mv88e6xxx/phy.h
@@ -28,6 +28,10 @@ int mv88e6xxx_phy_read(struct mv88e6xxx_chip *chip, int phy,
 		       int reg, u16 *val);
 int mv88e6xxx_phy_write(struct mv88e6xxx_chip *chip, int phy,
 			int reg, u16 val);
+int mv88e6xxx_phy_read_c45(struct mv88e6xxx_chip *chip, int phy, int devad,
+			   int reg, u16 *val);
+int mv88e6xxx_phy_write_c45(struct mv88e6xxx_chip *chip, int phy, int devad,
+			    int reg, u16 val);
 int mv88e6xxx_phy_page_read(struct mv88e6xxx_chip *chip, int phy,
 			    u8 page, int reg, u16 *val);
 int mv88e6xxx_phy_page_write(struct mv88e6xxx_chip *chip, int phy,
diff --git a/drivers/net/dsa/mv88e6xxx/serdes.c b/drivers/net/dsa/mv88e6xxx/serdes.c
index d94150d8f3f4..72faec8f44dc 100644
--- a/drivers/net/dsa/mv88e6xxx/serdes.c
+++ b/drivers/net/dsa/mv88e6xxx/serdes.c
@@ -36,17 +36,13 @@ static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
 static int mv88e6390_serdes_read(struct mv88e6xxx_chip *chip,
 				 int lane, int device, int reg, u16 *val)
 {
-	int reg_c45 = MII_ADDR_C45 | device << 16 | reg;
-
-	return mv88e6xxx_phy_read(chip, lane, reg_c45, val);
+	return mv88e6xxx_phy_read_c45(chip, lane, device, reg, val);
 }
 
 static int mv88e6390_serdes_write(struct mv88e6xxx_chip *chip,
 				  int lane, int device, int reg, u16 val)
 {
-	int reg_c45 = MII_ADDR_C45 | device << 16 | reg;
-
-	return mv88e6xxx_phy_write(chip, lane, reg_c45, val);
+	return mv88e6xxx_phy_write_c45(chip, lane, device, reg, val);
 }
 
 static int mv88e6xxx_serdes_pcs_get_state(struct mv88e6xxx_chip *chip,

-- 
2.30.2

Re: [PATCH net-next v3 02/11] net: pcs: pcs-xpcs: Use C45 MDIO API

[Florian Fainelli]

On 1/9/23 07:30, Michael Walle wrote:
> From: Andrew Lunn <andrew@lunn.ch>
> 
> Convert the PCS-XPCS driver to make use of the C45 MDIO bus API for
> modify_change().
> 
> Signed-off-by: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Michael Walle <michael@walle.cc>
> Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian

Re: [PATCH net-next v3 01/11] net: mdio: Add dedicated C45 API to MDIO bus drivers

[Paolo Abeni]

On Mon, 2023-01-09 at 16:30 +0100, Michael Walle wrote:
> diff --git a/include/linux/phy.h b/include/linux/phy.h
> index 6378c997ded5..65844f0a7fb3 100644
> --- a/include/linux/phy.h
> +++ b/include/linux/phy.h
> @@ -364,6 +364,11 @@ struct mii_bus {
>  	int (*read)(struct mii_bus *bus, int addr, int regnum);
>  	/** @write: Perform a write transfer on the bus */
>  	int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
> +	/** @read: Perform a C45 read transfer on the bus */

Minor nit: s/@read/@read_c45/ 

> +	int (*read_c45)(struct mii_bus *bus, int addr, int devnum, int regnum);
> +	/** @write: Perform a C45 write transfer on the bus */

Mutatis mutandis, same thing here.

Thanks!

Paolo

Re: [PATCH net-next v3 01/11] net: mdio: Add dedicated C45 API to MDIO bus drivers

[Paolo Abeni]

On Tue, 2023-01-10 at 12:16 +0100, Paolo Abeni wrote:
> On Mon, 2023-01-09 at 16:30 +0100, Michael Walle wrote:
> > diff --git a/include/linux/phy.h b/include/linux/phy.h
> > index 6378c997ded5..65844f0a7fb3 100644
> > --- a/include/linux/phy.h
> > +++ b/include/linux/phy.h
> > @@ -364,6 +364,11 @@ struct mii_bus {
> >  	int (*read)(struct mii_bus *bus, int addr, int regnum);
> >  	/** @write: Perform a write transfer on the bus */
> >  	int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
> > +	/** @read: Perform a C45 read transfer on the bus */
> 
> Minor nit: s/@read/@read_c45/ 
> 
> > +	int (*read_c45)(struct mii_bus *bus, int addr, int devnum, int regnum);
> > +	/** @write: Perform a C45 write transfer on the bus */
> 
> Mutatis mutandis, same thing here.

Otherwise the series LGTM. I think it would be preferable avoiding
reposting a largish series like this for such a minor change. I think
the series can be merged as-is and the above can be addressed with a
follow-up patch.

Cheers,

Paolo

Re: [PATCH net-next v3 01/11] net: mdio: Add dedicated C45 API to MDIO bus drivers

[Jakub Kicinski]

On Tue, 10 Jan 2023 13:49:28 +0100 Paolo Abeni wrote:
> On Tue, 2023-01-10 at 12:16 +0100, Paolo Abeni wrote:
> > On Mon, 2023-01-09 at 16:30 +0100, Michael Walle wrote:  
> > > diff --git a/include/linux/phy.h b/include/linux/phy.h
> > > index 6378c997ded5..65844f0a7fb3 100644
> > > --- a/include/linux/phy.h
> > > +++ b/include/linux/phy.h
> > > @@ -364,6 +364,11 @@ struct mii_bus {
> > >  	int (*read)(struct mii_bus *bus, int addr, int regnum);
> > >  	/** @write: Perform a write transfer on the bus */
> > >  	int (*write)(struct mii_bus *bus, int addr, int regnum, u16 val);
> > > +	/** @read: Perform a C45 read transfer on the bus */  
> > 
> > Minor nit: s/@read/@read_c45/ 
> >   
> > > +	int (*read_c45)(struct mii_bus *bus, int addr, int devnum, int regnum);
> > > +	/** @write: Perform a C45 write transfer on the bus */  
> > 
> > Mutatis mutandis, same thing here.  
> 
> Otherwise the series LGTM. I think it would be preferable avoiding
> reposting a largish series like this for such a minor change. I think
> the series can be merged as-is and the above can be addressed with a
> follow-up patch.

Hmmm if we're doing special treatment I guess can as well fix this 
when applying. Save people who report warnings potential work.

Re: [PATCH net-next v3 00/11] net: mdio: Start separating C22 and C45

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Mon, 09 Jan 2023 16:30:41 +0100 you wrote:
> I've picked this older series from Andrew up and rebased it onto
> v6.2-rc1.
> 
> This patch set starts the separation of C22 and C45 MDIO bus
> transactions at the API level to the MDIO Bus drivers. C45 read and
> write ops are added to the MDIO bus driver structure, and the MDIO
> core will try to use these ops if requested to perform a C45
> transfer. If not available a fallback to the older API is made, to
> allow backwards compatibility until all drivers are converted.
> 
> [...]

Here is the summary with links:
  - [net-next,v3,01/11] net: mdio: Add dedicated C45 API to MDIO bus drivers
    (no matching commit)
  - [net-next,v3,02/11] net: pcs: pcs-xpcs: Use C45 MDIO API
    https://git.kernel.org/netdev/net-next/c/3a65e5f91780
  - [net-next,v3,03/11] net: mdio: mdiobus_register: update validation test
    https://git.kernel.org/netdev/net-next/c/555d64c6d8e5
  - [net-next,v3,04/11] net: mdio: C22 is now optional, EOPNOTSUPP if not provided
    https://git.kernel.org/netdev/net-next/c/b063b1924fd9
  - [net-next,v3,05/11] net: mdio: Move mdiobus_c45_addr() next to users
    https://git.kernel.org/netdev/net-next/c/ce30fa56cbf0
  - [net-next,v3,06/11] net: mdio: mdio-bitbang: Separate C22 and C45 transactions
    https://git.kernel.org/netdev/net-next/c/002dd3de097c
  - [net-next,v3,07/11] net: mdio: mvmdio: Convert XSMI bus to new API
    https://git.kernel.org/netdev/net-next/c/b3c84ae5ff99
  - [net-next,v3,08/11] net: mdio: xgmac_mdio: Separate C22 and C45 transactions
    https://git.kernel.org/netdev/net-next/c/c0fc8e6dcee4
  - [net-next,v3,09/11] net: fec: Separate C22 and C45 transactions
    https://git.kernel.org/netdev/net-next/c/8d03ad1ab0b0
  - [net-next,v3,10/11] net: mdio: add mdiobus_c45_read/write_nested helpers
    https://git.kernel.org/netdev/net-next/c/1d914d51f03c
  - [net-next,v3,11/11] net: dsa: mv88e6xxx: Separate C22 and C45 transactions
    https://git.kernel.org/netdev/net-next/c/743a19e38d02

You are awesome, thank you!
-- 
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