net: dsa: sja1105: C45 only transactions for PCS

The sja1105 MDIO bus driver only supports C45 transfers. Update the
function names to make this clear, pass the mmd as a parameter, and
register the accessors to the _c45 ops of the bus driver structure.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/dsa/sja1105/sja1105.h

@@ -149,8 +149,10 @@ struct sja1105_info {
 	bool (*rxtstamp)(struct dsa_switch *ds, int port, struct sk_buff *skb);
 	void (*txtstamp)(struct dsa_switch *ds, int port, struct sk_buff *skb);
 	int (*clocking_setup)(struct sja1105_private *priv);
-	int (*pcs_mdio_read)(struct mii_bus *bus, int phy, int reg);
-	int (*pcs_mdio_write)(struct mii_bus *bus, int phy, int reg, u16 val);
+	int (*pcs_mdio_read_c45)(struct mii_bus *bus, int phy, int mmd,
+				 int reg);
+	int (*pcs_mdio_write_c45)(struct mii_bus *bus, int phy, int mmd,
+				  int reg, u16 val);
 	int (*disable_microcontroller)(struct sja1105_private *priv);
 	const char *name;
 	bool supports_mii[SJA1105_MAX_NUM_PORTS];
@@ -303,10 +305,12 @@ void sja1105_frame_memory_partitioning(struct sja1105_private *priv);
 /* From sja1105_mdio.c */
 int sja1105_mdiobus_register(struct dsa_switch *ds);
 void sja1105_mdiobus_unregister(struct dsa_switch *ds);
-int sja1105_pcs_mdio_read(struct mii_bus *bus, int phy, int reg);
-int sja1105_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val);
-int sja1110_pcs_mdio_read(struct mii_bus *bus, int phy, int reg);
-int sja1110_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val);
+int sja1105_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg);
+int sja1105_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd, int reg,
+			       u16 val);
+int sja1110_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg);
+int sja1110_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd, int reg,
+			       u16 val);
 
 /* From sja1105_devlink.c */
 int sja1105_devlink_setup(struct dsa_switch *ds);

drivers/net/dsa/sja1105/sja1105_mdio.c

@@ -7,20 +7,15 @@
 
 #define SJA1110_PCS_BANK_REG		SJA1110_SPI_ADDR(0x3fc)
 
-int sja1105_pcs_mdio_read(struct mii_bus *bus, int phy, int reg)
+int sja1105_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg)
 {
 	struct sja1105_mdio_private *mdio_priv = bus->priv;
 	struct sja1105_private *priv = mdio_priv->priv;
 	u64 addr;
 	u32 tmp;
-	u16 mmd;
 	int rc;
 
-	if (!(reg & MII_ADDR_C45))
-		return -EINVAL;
-
-	mmd = (reg >> MII_DEVADDR_C45_SHIFT) & 0x1f;
-	addr = (mmd << 16) | (reg & GENMASK(15, 0));
+	addr = (mmd << 16) | reg;
 
 	if (mmd != MDIO_MMD_VEND1 && mmd != MDIO_MMD_VEND2)
 		return 0xffff;
@@ -37,19 +32,15 @@ int sja1105_pcs_mdio_read(struct mii_bus *bus, int phy, int reg)
 	return tmp & 0xffff;
 }
 
-int sja1105_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
+int sja1105_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int mmd,
+			       int reg, u16 val)
 {
 	struct sja1105_mdio_private *mdio_priv = bus->priv;
 	struct sja1105_private *priv = mdio_priv->priv;
 	u64 addr;
 	u32 tmp;
-	u16 mmd;
-
-	if (!(reg & MII_ADDR_C45))
-		return -EINVAL;
 
-	mmd = (reg >> MII_DEVADDR_C45_SHIFT) & 0x1f;
-	addr = (mmd << 16) | (reg & GENMASK(15, 0));
+	addr = (mmd << 16) | reg;
 	tmp = val;
 
 	if (mmd != MDIO_MMD_VEND1 && mmd != MDIO_MMD_VEND2)
@@ -58,7 +49,7 @@ int sja1105_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 	return sja1105_xfer_u32(priv, SPI_WRITE, addr, &tmp, NULL);
 }
 
-int sja1110_pcs_mdio_read(struct mii_bus *bus, int phy, int reg)
+int sja1110_pcs_mdio_read_c45(struct mii_bus *bus, int phy, int mmd, int reg)
 {
 	struct sja1105_mdio_private *mdio_priv = bus->priv;
 	struct sja1105_private *priv = mdio_priv->priv;
@@ -66,17 +57,12 @@ int sja1110_pcs_mdio_read(struct mii_bus *bus, int phy, int reg)
 	int offset, bank;
 	u64 addr;
 	u32 tmp;
-	u16 mmd;
 	int rc;
 
-	if (!(reg & MII_ADDR_C45))
-		return -EINVAL;
-
 	if (regs->pcs_base[phy] == SJA1105_RSV_ADDR)
 		return -ENODEV;
 
-	mmd = (reg >> MII_DEVADDR_C45_SHIFT) & 0x1f;
-	addr = (mmd << 16) | (reg & GENMASK(15, 0));
+	addr = (mmd << 16) | reg;
 
 	if (mmd == MDIO_MMD_VEND2 && (reg & GENMASK(15, 0)) == MII_PHYSID1)
 		return NXP_SJA1110_XPCS_ID >> 16;
@@ -108,7 +94,8 @@ int sja1110_pcs_mdio_read(struct mii_bus *bus, int phy, int reg)
 	return tmp & 0xffff;
 }
 
-int sja1110_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
+int sja1110_pcs_mdio_write_c45(struct mii_bus *bus, int phy, int reg, int mmd,
+			       u16 val)
 {
 	struct sja1105_mdio_private *mdio_priv = bus->priv;
 	struct sja1105_private *priv = mdio_priv->priv;
@@ -116,17 +103,12 @@ int sja1110_pcs_mdio_write(struct mii_bus *bus, int phy, int reg, u16 val)
 	int offset, bank;
 	u64 addr;
 	u32 tmp;
-	u16 mmd;
 	int rc;
 
-	if (!(reg & MII_ADDR_C45))
-		return -EINVAL;
-
 	if (regs->pcs_base[phy] == SJA1105_RSV_ADDR)
 		return -ENODEV;
 
-	mmd = (reg >> MII_DEVADDR_C45_SHIFT) & 0x1f;
-	addr = (mmd << 16) | (reg & GENMASK(15, 0));
+	addr = (mmd << 16) | reg;
 
 	bank = addr >> 8;
 	offset = addr & GENMASK(7, 0);
@@ -398,7 +380,7 @@ static int sja1105_mdiobus_pcs_register(struct sja1105_private *priv)
 	int rc = 0;
 	int port;
 
-	if (!priv->info->pcs_mdio_read || !priv->info->pcs_mdio_write)
+	if (!priv->info->pcs_mdio_read_c45 || !priv->info->pcs_mdio_write_c45)
 		return 0;
 
 	bus = mdiobus_alloc_size(sizeof(*mdio_priv));
@@ -408,8 +390,8 @@ static int sja1105_mdiobus_pcs_register(struct sja1105_private *priv)
 	bus->name = "SJA1105 PCS MDIO bus";
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-pcs",
 		 dev_name(ds->dev));
-	bus->read = priv->info->pcs_mdio_read;
-	bus->write = priv->info->pcs_mdio_write;
+	bus->read_c45 = priv->info->pcs_mdio_read_c45;
+	bus->write_c45 = priv->info->pcs_mdio_write_c45;
 	bus->parent = ds->dev;
 	/* There is no PHY on this MDIO bus => mask out all PHY addresses
 	 * from auto probing.

drivers/net/dsa/sja1105/sja1105_spi.c

@@ -719,8 +719,8 @@ const struct sja1105_info sja1105r_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.rxtstamp		= sja1105_rxtstamp,
 	.clocking_setup		= sja1105_clocking_setup,
-	.pcs_mdio_read		= sja1105_pcs_mdio_read,
-	.pcs_mdio_write		= sja1105_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1105_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1105_pcs_mdio_write_c45,
 	.regs			= &sja1105pqrs_regs,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
@@ -756,8 +756,8 @@ const struct sja1105_info sja1105s_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.rxtstamp		= sja1105_rxtstamp,
 	.clocking_setup		= sja1105_clocking_setup,
-	.pcs_mdio_read		= sja1105_pcs_mdio_read,
-	.pcs_mdio_write		= sja1105_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1105_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1105_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 3,
@@ -794,8 +794,8 @@ const struct sja1105_info sja1110a_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read		= sja1110_pcs_mdio_read,
-	.pcs_mdio_write		= sja1110_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -844,8 +844,8 @@ const struct sja1105_info sja1110b_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read		= sja1110_pcs_mdio_read,
-	.pcs_mdio_write		= sja1110_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -894,8 +894,8 @@ const struct sja1105_info sja1110c_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read		= sja1110_pcs_mdio_read,
-	.pcs_mdio_write		= sja1110_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,
@@ -944,8 +944,8 @@ const struct sja1105_info sja1110d_info = {
 	.rxtstamp		= sja1110_rxtstamp,
 	.txtstamp		= sja1110_txtstamp,
 	.disable_microcontroller = sja1110_disable_microcontroller,
-	.pcs_mdio_read		= sja1110_pcs_mdio_read,
-	.pcs_mdio_write		= sja1110_pcs_mdio_write,
+	.pcs_mdio_read_c45	= sja1110_pcs_mdio_read_c45,
+	.pcs_mdio_write_c45	= sja1110_pcs_mdio_write_c45,
 	.port_speed		= {
 		[SJA1105_SPEED_AUTO] = 0,
 		[SJA1105_SPEED_10MBPS] = 4,