[PATCH v3 net-next 0/8] Part 2 of SJA1105 DSA driver preparation for new switch introduction (SJA1110)

[PATCH v3 net-next 0/8] Part 2 of SJA1105 DSA driver preparation for new switch introduction (SJA1110)

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

This series is a continuation of:
https://patchwork.kernel.org/project/netdevbpf/cover/20210524131421.1030789-1-olteanv@gmail.com/

even though it isn't the first time these patches are submitted (they
were part of the group previously called "Add NXP SJA1110 support to the
sja1105 DSA driver"):
https://patchwork.kernel.org/project/netdevbpf/cover/20210526135535.2515123-1-vladimir.oltean@nxp.com/

but I broke that up again since these patches are already reviewed, for
the most part. There are no changes compared to v2 and v1.

This series of patches contains:

- an adaptation of the driver to the new "ethernet-ports" OF node name
- an adaptation of the driver to support more than 1 SGMII port
- a generalization of the supported phy_interface_t values per port
- an adaptation to encode SPEED_10, SPEED_100, SPEED_1000 into the
  hardware registers differently depending on switch revision
- a consolidation of the PHY interface type used for RGMII and another
  one for the API exposed for sja1105_dynamic_config_read()

Cc: Russell King <linux@armlinux.org.uk>
Cc: Heiner Kallweit <hkallweit1@gmail.com>

Vladimir Oltean (8):
  net: dsa: sja1105: be compatible with "ethernet-ports" OF node name
  net: dsa: sja1105: allow SGMII PCS configuration to be per port
  net: dsa: sja1105: the 0x1F0000 SGMII "base address" is actually
    MDIO_MMD_VEND2
  net: dsa: sja1105: cache the phy-mode port property
  net: dsa: sja1105: add a PHY interface type compatibility matrix
  net: dsa: sja1105: add a translation table for port speeds
  net: dsa: sja1105: always keep RGMII ports in the MAC role
  net: dsa: sja1105: some table entries are always present when read
    dynamically

 drivers/net/dsa/sja1105/sja1105.h             |  24 +-
 drivers/net/dsa/sja1105/sja1105_clocking.c    |  29 +--
 .../net/dsa/sja1105/sja1105_dynamic_config.c  |  15 +-
 drivers/net/dsa/sja1105/sja1105_main.c        | 207 ++++++++++--------
 drivers/net/dsa/sja1105/sja1105_spi.c         |  63 +++++-
 5 files changed, 206 insertions(+), 132 deletions(-)

-- 
2.25.1

[PATCH v3 net-next 1/8] net: dsa: sja1105: be compatible with "ethernet-ports" OF node name

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

Since commit f2f3e09396be ("net: dsa: sja1105: be compatible with
"ethernet-ports" OF node name"), DSA supports the "ethernet-ports" name
for the container node of the ports, but the sja1105 driver doesn't,
because it handles some device tree parsing of its own.

Add the second node name as a fallback.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 2080f36ff25b..4c776bd7ce25 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -885,6 +885,8 @@ static int sja1105_parse_dt(struct sja1105_private *priv,
 	int rc;
 
 	ports_node = of_get_child_by_name(switch_node, "ports");
+	if (!ports_node)
+		ports_node = of_get_child_by_name(switch_node, "ethernet-ports");
 	if (!ports_node) {
 		dev_err(dev, "Incorrect bindings: absent \"ports\" node\n");
 		return -ENODEV;
-- 
2.25.1

[PATCH v3 net-next 2/8] net: dsa: sja1105: allow SGMII PCS configuration to be per port

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

The SJA1105 R and S switches have 1 SGMII port (port 4). Because there
is only one such port, there is no "port" parameter in the configuration
code for the SGMII PCS.

However, the SJA1110 can have up to 4 SGMII ports, each with its own
SGMII register map. So we need to generalize the logic.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105_main.c | 75 +++++++++++++++-----------
 1 file changed, 44 insertions(+), 31 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 4c776bd7ce25..1e4e05d429af 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -898,36 +898,43 @@ static int sja1105_parse_dt(struct sja1105_private *priv,
 	return rc;
 }
 
-static int sja1105_sgmii_read(struct sja1105_private *priv, int pcs_reg)
+static int sja1105_sgmii_read(struct sja1105_private *priv, int port,
+			      int pcs_reg)
 {
 	const struct sja1105_regs *regs = priv->info->regs;
 	u32 val;
 	int rc;
 
-	rc = sja1105_xfer_u32(priv, SPI_READ, regs->sgmii + pcs_reg, &val,
-			      NULL);
+	if (port != SJA1105_SGMII_PORT)
+		return -ENODEV;
+
+	rc = sja1105_xfer_u32(priv, SPI_READ, regs->sgmii + pcs_reg,
+			      &val, NULL);
 	if (rc < 0)
 		return rc;
 
 	return val;
 }
 
-static int sja1105_sgmii_write(struct sja1105_private *priv, int pcs_reg,
-			       u16 pcs_val)
+static int sja1105_sgmii_write(struct sja1105_private *priv, int port,
+			       int pcs_reg, u16 pcs_val)
 {
 	const struct sja1105_regs *regs = priv->info->regs;
 	u32 val = pcs_val;
 	int rc;
 
-	rc = sja1105_xfer_u32(priv, SPI_WRITE, regs->sgmii + pcs_reg, &val,
-			      NULL);
+	if (port != SJA1105_SGMII_PORT)
+		return -ENODEV;
+
+	rc = sja1105_xfer_u32(priv, SPI_WRITE, regs->sgmii + pcs_reg,
+			      &val, NULL);
 	if (rc < 0)
 		return rc;
 
 	return val;
 }
 
-static void sja1105_sgmii_pcs_config(struct sja1105_private *priv,
+static void sja1105_sgmii_pcs_config(struct sja1105_private *priv, int port,
 				     bool an_enabled, bool an_master)
 {
 	u16 ac = SJA1105_AC_AUTONEG_MODE_SGMII;
@@ -936,27 +943,29 @@ static void sja1105_sgmii_pcs_config(struct sja1105_private *priv,
 	 * stop the clock during LPI mode, make the MAC reconfigure
 	 * autonomously after PCS autoneg is done, flush the internal FIFOs.
 	 */
-	sja1105_sgmii_write(priv, SJA1105_DC1, SJA1105_DC1_EN_VSMMD1 |
-					       SJA1105_DC1_CLOCK_STOP_EN |
-					       SJA1105_DC1_MAC_AUTO_SW |
-					       SJA1105_DC1_INIT);
+	sja1105_sgmii_write(priv, port, SJA1105_DC1,
+			    SJA1105_DC1_EN_VSMMD1 |
+			    SJA1105_DC1_CLOCK_STOP_EN |
+			    SJA1105_DC1_MAC_AUTO_SW |
+			    SJA1105_DC1_INIT);
 	/* DIGITAL_CONTROL_2: No polarity inversion for TX and RX lanes */
-	sja1105_sgmii_write(priv, SJA1105_DC2, SJA1105_DC2_TX_POL_INV_DISABLE);
+	sja1105_sgmii_write(priv, port, SJA1105_DC2,
+			    SJA1105_DC2_TX_POL_INV_DISABLE);
 	/* AUTONEG_CONTROL: Use SGMII autoneg */
 	if (an_master)
 		ac |= SJA1105_AC_PHY_MODE | SJA1105_AC_SGMII_LINK;
-	sja1105_sgmii_write(priv, SJA1105_AC, ac);
+	sja1105_sgmii_write(priv, port, SJA1105_AC, ac);
 	/* BASIC_CONTROL: enable in-band AN now, if requested. Otherwise,
 	 * sja1105_sgmii_pcs_force_speed must be called later for the link
 	 * to become operational.
 	 */
 	if (an_enabled)
-		sja1105_sgmii_write(priv, MII_BMCR,
+		sja1105_sgmii_write(priv, port, MII_BMCR,
 				    BMCR_ANENABLE | BMCR_ANRESTART);
 }
 
 static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv,
-					  int speed)
+					  int port, int speed)
 {
 	int pcs_speed;
 
@@ -974,7 +983,7 @@ static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv,
 		dev_err(priv->ds->dev, "Invalid speed %d\n", speed);
 		return;
 	}
-	sja1105_sgmii_write(priv, MII_BMCR, pcs_speed | BMCR_FULLDPLX);
+	sja1105_sgmii_write(priv, port, MII_BMCR, pcs_speed | BMCR_FULLDPLX);
 }
 
 /* Convert link speed from SJA1105 to ethtool encoding */
@@ -1115,7 +1124,8 @@ static void sja1105_mac_config(struct dsa_switch *ds, int port,
 	}
 
 	if (is_sgmii)
-		sja1105_sgmii_pcs_config(priv, phylink_autoneg_inband(mode),
+		sja1105_sgmii_pcs_config(priv, port,
+					 phylink_autoneg_inband(mode),
 					 false);
 }
 
@@ -1138,7 +1148,7 @@ static void sja1105_mac_link_up(struct dsa_switch *ds, int port,
 	sja1105_adjust_port_config(priv, port, speed);
 
 	if (sja1105_supports_sgmii(priv, port) && !phylink_autoneg_inband(mode))
-		sja1105_sgmii_pcs_force_speed(priv, speed);
+		sja1105_sgmii_pcs_force_speed(priv, port, speed);
 
 	sja1105_inhibit_tx(priv, BIT(port), false);
 }
@@ -1191,7 +1201,7 @@ static int sja1105_mac_pcs_get_state(struct dsa_switch *ds, int port,
 	int ais;
 
 	/* Read the vendor-specific AUTONEG_INTR_STATUS register */
-	ais = sja1105_sgmii_read(priv, SJA1105_AIS);
+	ais = sja1105_sgmii_read(priv, port, SJA1105_AIS);
 	if (ais < 0)
 		return ais;
 
@@ -1873,11 +1883,11 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 	struct ptp_system_timestamp ptp_sts_before;
 	struct ptp_system_timestamp ptp_sts_after;
 	int speed_mbps[SJA1105_MAX_NUM_PORTS];
+	u16 bmcr[SJA1105_MAX_NUM_PORTS] = {0};
 	struct sja1105_mac_config_entry *mac;
 	struct dsa_switch *ds = priv->ds;
 	s64 t1, t2, t3, t4;
 	s64 t12, t34;
-	u16 bmcr = 0;
 	int rc, i;
 	s64 now;
 
@@ -1893,10 +1903,10 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 	for (i = 0; i < ds->num_ports; i++) {
 		speed_mbps[i] = sja1105_speed[mac[i].speed];
 		mac[i].speed = SJA1105_SPEED_AUTO;
-	}
 
-	if (sja1105_supports_sgmii(priv, SJA1105_SGMII_PORT))
-		bmcr = sja1105_sgmii_read(priv, MII_BMCR);
+		if (sja1105_supports_sgmii(priv, i))
+			bmcr[i] = sja1105_sgmii_read(priv, i, MII_BMCR);
+	}
 
 	/* No PTP operations can run right now */
 	mutex_lock(&priv->ptp_data.lock);
@@ -1943,27 +1953,30 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		goto out;
 
 	for (i = 0; i < ds->num_ports; i++) {
+		bool an_enabled;
+
 		rc = sja1105_adjust_port_config(priv, i, speed_mbps[i]);
 		if (rc < 0)
 			goto out;
-	}
 
-	if (sja1105_supports_sgmii(priv, SJA1105_SGMII_PORT)) {
-		bool an_enabled = !!(bmcr & BMCR_ANENABLE);
+		if (!sja1105_supports_sgmii(priv, i))
+			continue;
+
+		an_enabled = !!(bmcr[i] & BMCR_ANENABLE);
 
-		sja1105_sgmii_pcs_config(priv, an_enabled, false);
+		sja1105_sgmii_pcs_config(priv, i, an_enabled, false);
 
 		if (!an_enabled) {
 			int speed = SPEED_UNKNOWN;
 
-			if (bmcr & BMCR_SPEED1000)
+			if (bmcr[i] & BMCR_SPEED1000)
 				speed = SPEED_1000;
-			else if (bmcr & BMCR_SPEED100)
+			else if (bmcr[i] & BMCR_SPEED100)
 				speed = SPEED_100;
 			else
 				speed = SPEED_10;
 
-			sja1105_sgmii_pcs_force_speed(priv, speed);
+			sja1105_sgmii_pcs_force_speed(priv, i, speed);
 		}
 	}
 
-- 
2.25.1

[PATCH v3 net-next 3/8] net: dsa: sja1105: the 0x1F0000 SGMII "base address" is actually MDIO_MMD_VEND2

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

Looking at the SGMII PCS from SJA1110, which is accessed indirectly
through a different base address as can be seen in the next patch, it
appears odd that the address accessed through indirection still
references the base address from the SJA1105S register map (first MDIO
register is at 0x1f0000), when it could index the SGMII registers
starting from zero.

Except that the 0x1f0000 is not a base address at all, it seems. It is
0x1f << 16 | 0x0000, and 0x1f is coding for the vendor-specific MMD2.
So, it turns out, the Synopsys PCS implements all its registers inside
the vendor-specific MMDs 1 and 2 (0x1e and 0x1f). This explains why the
PCS has no overlaps (for the other MMDs) with other register regions of
the switch (because no other MMDs are implemented).

Change the code to remove the SGMII "base address" and explicitly encode
the MMD for reads/writes. This will become necessary for SJA1110 support.

Cc: Russell King <linux@armlinux.org.uk>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105.h      |  1 -
 drivers/net/dsa/sja1105/sja1105_main.c | 31 +++++++++++++-------------
 drivers/net/dsa/sja1105/sja1105_spi.c  |  1 -
 3 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index 2ec03917feb3..830ea5ca359f 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -48,7 +48,6 @@ struct sja1105_regs {
 	u64 rgu;
 	u64 vl_status;
 	u64 config;
-	u64 sgmii;
 	u64 rmii_pll1;
 	u64 ptppinst;
 	u64 ptppindur;
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 1e4e05d429af..c8d93d810421 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -898,36 +898,34 @@ static int sja1105_parse_dt(struct sja1105_private *priv,
 	return rc;
 }
 
-static int sja1105_sgmii_read(struct sja1105_private *priv, int port,
+static int sja1105_sgmii_read(struct sja1105_private *priv, int port, int mmd,
 			      int pcs_reg)
 {
-	const struct sja1105_regs *regs = priv->info->regs;
+	u64 addr = (mmd << 16) | pcs_reg;
 	u32 val;
 	int rc;
 
 	if (port != SJA1105_SGMII_PORT)
 		return -ENODEV;
 
-	rc = sja1105_xfer_u32(priv, SPI_READ, regs->sgmii + pcs_reg,
-			      &val, NULL);
+	rc = sja1105_xfer_u32(priv, SPI_READ, addr, &val, NULL);
 	if (rc < 0)
 		return rc;
 
 	return val;
 }
 
-static int sja1105_sgmii_write(struct sja1105_private *priv, int port,
+static int sja1105_sgmii_write(struct sja1105_private *priv, int port, int mmd,
 			       int pcs_reg, u16 pcs_val)
 {
-	const struct sja1105_regs *regs = priv->info->regs;
+	u64 addr = (mmd << 16) | pcs_reg;
 	u32 val = pcs_val;
 	int rc;
 
 	if (port != SJA1105_SGMII_PORT)
 		return -ENODEV;
 
-	rc = sja1105_xfer_u32(priv, SPI_WRITE, regs->sgmii + pcs_reg,
-			      &val, NULL);
+	rc = sja1105_xfer_u32(priv, SPI_WRITE, addr, &val, NULL);
 	if (rc < 0)
 		return rc;
 
@@ -943,24 +941,24 @@ static void sja1105_sgmii_pcs_config(struct sja1105_private *priv, int port,
 	 * stop the clock during LPI mode, make the MAC reconfigure
 	 * autonomously after PCS autoneg is done, flush the internal FIFOs.
 	 */
-	sja1105_sgmii_write(priv, port, SJA1105_DC1,
+	sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_DC1,
 			    SJA1105_DC1_EN_VSMMD1 |
 			    SJA1105_DC1_CLOCK_STOP_EN |
 			    SJA1105_DC1_MAC_AUTO_SW |
 			    SJA1105_DC1_INIT);
 	/* DIGITAL_CONTROL_2: No polarity inversion for TX and RX lanes */
-	sja1105_sgmii_write(priv, port, SJA1105_DC2,
+	sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_DC2,
 			    SJA1105_DC2_TX_POL_INV_DISABLE);
 	/* AUTONEG_CONTROL: Use SGMII autoneg */
 	if (an_master)
 		ac |= SJA1105_AC_PHY_MODE | SJA1105_AC_SGMII_LINK;
-	sja1105_sgmii_write(priv, port, SJA1105_AC, ac);
+	sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, SJA1105_AC, ac);
 	/* BASIC_CONTROL: enable in-band AN now, if requested. Otherwise,
 	 * sja1105_sgmii_pcs_force_speed must be called later for the link
 	 * to become operational.
 	 */
 	if (an_enabled)
-		sja1105_sgmii_write(priv, port, MII_BMCR,
+		sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, MDIO_CTRL1,
 				    BMCR_ANENABLE | BMCR_ANRESTART);
 }
 
@@ -983,7 +981,8 @@ static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv,
 		dev_err(priv->ds->dev, "Invalid speed %d\n", speed);
 		return;
 	}
-	sja1105_sgmii_write(priv, port, MII_BMCR, pcs_speed | BMCR_FULLDPLX);
+	sja1105_sgmii_write(priv, port, MDIO_MMD_VEND2, MDIO_CTRL1,
+			    pcs_speed | BMCR_FULLDPLX);
 }
 
 /* Convert link speed from SJA1105 to ethtool encoding */
@@ -1201,7 +1200,7 @@ static int sja1105_mac_pcs_get_state(struct dsa_switch *ds, int port,
 	int ais;
 
 	/* Read the vendor-specific AUTONEG_INTR_STATUS register */
-	ais = sja1105_sgmii_read(priv, port, SJA1105_AIS);
+	ais = sja1105_sgmii_read(priv, port, MDIO_MMD_VEND2, SJA1105_AIS);
 	if (ais < 0)
 		return ais;
 
@@ -1905,7 +1904,9 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		mac[i].speed = SJA1105_SPEED_AUTO;
 
 		if (sja1105_supports_sgmii(priv, i))
-			bmcr[i] = sja1105_sgmii_read(priv, i, MII_BMCR);
+			bmcr[i] = sja1105_sgmii_read(priv, i,
+						     MDIO_MMD_VEND2,
+						     MDIO_CTRL1);
 	}
 
 	/* No PTP operations can run right now */
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c
index d0bc6cf90bfd..615e0906b1fa 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -440,7 +440,6 @@ static struct sja1105_regs sja1105pqrs_regs = {
 	.pad_mii_tx = {0x100800, 0x100802, 0x100804, 0x100806, 0x100808},
 	.pad_mii_rx = {0x100801, 0x100803, 0x100805, 0x100807, 0x100809},
 	.pad_mii_id = {0x100810, 0x100811, 0x100812, 0x100813, 0x100814},
-	.sgmii = 0x1F0000,
 	.rmii_pll1 = 0x10000A,
 	.cgu_idiv = {0x10000B, 0x10000C, 0x10000D, 0x10000E, 0x10000F},
 	.stats[MAC] = {0x200, 0x202, 0x204, 0x206, 0x208},
-- 
2.25.1

[PATCH v3 net-next 4/8] net: dsa: sja1105: cache the phy-mode port property

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

So far we've succeeded in operating without keeping a copy of the
phy-mode in the driver, since we already have the static config and we
can look at the xMII Mode Parameters Table which already holds that
information.

But with the SJA1110, we cannot make the distinction between sgmii and
2500base-x, because to the hardware's static config, it's all SGMII.
So add a phy_mode property per port inside struct sja1105_private.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105.h      |  1 +
 drivers/net/dsa/sja1105/sja1105_main.c | 24 +++---------------------
 2 files changed, 4 insertions(+), 21 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index 830ea5ca359f..d5c0217b1f65 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -210,6 +210,7 @@ struct sja1105_private {
 	struct sja1105_static_config static_config;
 	bool rgmii_rx_delay[SJA1105_MAX_NUM_PORTS];
 	bool rgmii_tx_delay[SJA1105_MAX_NUM_PORTS];
+	phy_interface_t phy_mode[SJA1105_MAX_NUM_PORTS];
 	bool best_effort_vlan_filtering;
 	unsigned long learn_ena;
 	unsigned long ucast_egress_floods;
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index c8d93d810421..e4932243d0d3 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -871,6 +871,8 @@ static int sja1105_parse_ports_node(struct sja1105_private *priv,
 			ports[index].role = XMII_MAC;
 		else if (of_property_read_bool(child, "sja1105,role-phy"))
 			ports[index].role = XMII_PHY;
+
+		priv->phy_mode[index] = phy_mode;
 	}
 
 	return 0;
@@ -1081,27 +1083,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 static bool sja1105_phy_mode_mismatch(struct sja1105_private *priv, int port,
 				      phy_interface_t interface)
 {
-	struct sja1105_xmii_params_entry *mii;
-	sja1105_phy_interface_t phy_mode;
-
-	mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
-	phy_mode = mii->xmii_mode[port];
-
-	switch (interface) {
-	case PHY_INTERFACE_MODE_MII:
-		return (phy_mode != XMII_MODE_MII);
-	case PHY_INTERFACE_MODE_RMII:
-		return (phy_mode != XMII_MODE_RMII);
-	case PHY_INTERFACE_MODE_RGMII:
-	case PHY_INTERFACE_MODE_RGMII_ID:
-	case PHY_INTERFACE_MODE_RGMII_RXID:
-	case PHY_INTERFACE_MODE_RGMII_TXID:
-		return (phy_mode != XMII_MODE_RGMII);
-	case PHY_INTERFACE_MODE_SGMII:
-		return (phy_mode != XMII_MODE_SGMII);
-	default:
-		return true;
-	}
+	return priv->phy_mode[port] != interface;
 }
 
 static void sja1105_mac_config(struct dsa_switch *ds, int port,
-- 
2.25.1

[PATCH v3 net-next 5/8] net: dsa: sja1105: add a PHY interface type compatibility matrix

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

On the SJA1105, all ports support the parallel "xMII" protocols (MII,
RMII, RGMII) except for port 4 on SJA1105R/S which supports only SGMII.
This was relatively easy to model, by special-casing the SGMII port.

On the SJA1110, certain ports can be pinmuxed between SGMII and xMII, or
between SGMII and an internal 100base-TX PHY. This creates problems,
because the driver's assumption so far was that if a port supports
SGMII, it uses SGMII.

We allow the device tree to tell us how the port pinmuxing is done, and
check that against a PHY interface type compatibility matrix for
plausibility.

The other big change is that instead of doing SGMII configuration based
on what the port supports, we do it based on what is the configured
phy_mode of the port.

The 2500base-x support added in this patch is not complete.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105.h      |  5 +++
 drivers/net/dsa/sja1105/sja1105_main.c | 59 +++++++++++++-------------
 drivers/net/dsa/sja1105/sja1105_spi.c  | 20 +++++++++
 3 files changed, 55 insertions(+), 29 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index d5c0217b1f65..a27841642693 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -111,6 +111,11 @@ struct sja1105_info {
 				enum packing_op op);
 	int (*clocking_setup)(struct sja1105_private *priv);
 	const char *name;
+	bool supports_mii[SJA1105_MAX_NUM_PORTS];
+	bool supports_rmii[SJA1105_MAX_NUM_PORTS];
+	bool supports_rgmii[SJA1105_MAX_NUM_PORTS];
+	bool supports_sgmii[SJA1105_MAX_NUM_PORTS];
+	bool supports_2500basex[SJA1105_MAX_NUM_PORTS];
 };
 
 enum sja1105_key_type {
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index e4932243d0d3..3682b04d37cb 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -143,21 +143,6 @@ static int sja1105_init_mac_settings(struct sja1105_private *priv)
 	return 0;
 }
 
-static bool sja1105_supports_sgmii(struct sja1105_private *priv, int port)
-{
-	if (priv->info->part_no != SJA1105R_PART_NO &&
-	    priv->info->part_no != SJA1105S_PART_NO)
-		return false;
-
-	if (port != SJA1105_SGMII_PORT)
-		return false;
-
-	if (dsa_is_unused_port(priv->ds, port))
-		return false;
-
-	return true;
-}
-
 static int sja1105_init_mii_settings(struct sja1105_private *priv,
 				     struct sja1105_dt_port *ports)
 {
@@ -191,25 +176,42 @@ static int sja1105_init_mii_settings(struct sja1105_private *priv,
 
 		switch (ports[i].phy_mode) {
 		case PHY_INTERFACE_MODE_MII:
+			if (!priv->info->supports_mii[i])
+				goto unsupported;
+
 			mii->xmii_mode[i] = XMII_MODE_MII;
 			break;
 		case PHY_INTERFACE_MODE_RMII:
+			if (!priv->info->supports_rmii[i])
+				goto unsupported;
+
 			mii->xmii_mode[i] = XMII_MODE_RMII;
 			break;
 		case PHY_INTERFACE_MODE_RGMII:
 		case PHY_INTERFACE_MODE_RGMII_ID:
 		case PHY_INTERFACE_MODE_RGMII_RXID:
 		case PHY_INTERFACE_MODE_RGMII_TXID:
+			if (!priv->info->supports_rgmii[i])
+				goto unsupported;
+
 			mii->xmii_mode[i] = XMII_MODE_RGMII;
 			break;
 		case PHY_INTERFACE_MODE_SGMII:
-			if (!sja1105_supports_sgmii(priv, i))
-				return -EINVAL;
+			if (!priv->info->supports_sgmii[i])
+				goto unsupported;
+
+			mii->xmii_mode[i] = XMII_MODE_SGMII;
+			break;
+		case PHY_INTERFACE_MODE_2500BASEX:
+			if (!priv->info->supports_2500basex[i])
+				goto unsupported;
+
 			mii->xmii_mode[i] = XMII_MODE_SGMII;
 			break;
+unsupported:
 		default:
-			dev_err(dev, "Unsupported PHY mode %s!\n",
-				phy_modes(ports[i].phy_mode));
+			dev_err(dev, "Unsupported PHY mode %s on port %d!\n",
+				phy_modes(ports[i].phy_mode), i);
 			return -EINVAL;
 		}
 
@@ -999,10 +1001,8 @@ static int sja1105_speed[] = {
 static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 				      int speed_mbps)
 {
-	struct sja1105_xmii_params_entry *mii;
 	struct sja1105_mac_config_entry *mac;
 	struct device *dev = priv->ds->dev;
-	sja1105_phy_interface_t phy_mode;
 	sja1105_speed_t speed;
 	int rc;
 
@@ -1013,7 +1013,6 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	 * reasonable approximation for both E/T and P/Q/R/S.
 	 */
 	mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
-	mii = priv->static_config.tables[BLK_IDX_XMII_PARAMS].entries;
 
 	switch (speed_mbps) {
 	case SPEED_UNKNOWN:
@@ -1047,7 +1046,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	 * Actually for the SGMII port, the MAC is fixed at 1 Gbps and
 	 * we need to configure the PCS only (if even that).
 	 */
-	if (sja1105_supports_sgmii(priv, port))
+	if (priv->phy_mode[port] == PHY_INTERFACE_MODE_SGMII)
 		mac[port].speed = SJA1105_SPEED_1000MBPS;
 	else
 		mac[port].speed = speed;
@@ -1066,8 +1065,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	 * the clock setup does interrupt the clock signal for a certain time
 	 * which causes trouble for all PHYs relying on this signal.
 	 */
-	phy_mode = mii->xmii_mode[port];
-	if (phy_mode != XMII_MODE_RGMII)
+	if (!phy_interface_mode_is_rgmii(priv->phy_mode[port]))
 		return 0;
 
 	return sja1105_clocking_setup_port(priv, port);
@@ -1091,7 +1089,9 @@ static void sja1105_mac_config(struct dsa_switch *ds, int port,
 			       const struct phylink_link_state *state)
 {
 	struct sja1105_private *priv = ds->priv;
-	bool is_sgmii = sja1105_supports_sgmii(priv, port);
+	bool is_sgmii;
+
+	is_sgmii = (state->interface == PHY_INTERFACE_MODE_SGMII);
 
 	if (sja1105_phy_mode_mismatch(priv, port, state->interface)) {
 		dev_err(ds->dev, "Changing PHY mode to %s not supported!\n",
@@ -1128,7 +1128,8 @@ static void sja1105_mac_link_up(struct dsa_switch *ds, int port,
 
 	sja1105_adjust_port_config(priv, port, speed);
 
-	if (sja1105_supports_sgmii(priv, port) && !phylink_autoneg_inband(mode))
+	if (priv->phy_mode[port] == PHY_INTERFACE_MODE_SGMII &&
+	    !phylink_autoneg_inband(mode))
 		sja1105_sgmii_pcs_force_speed(priv, port, speed);
 
 	sja1105_inhibit_tx(priv, BIT(port), false);
@@ -1885,7 +1886,7 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		speed_mbps[i] = sja1105_speed[mac[i].speed];
 		mac[i].speed = SJA1105_SPEED_AUTO;
 
-		if (sja1105_supports_sgmii(priv, i))
+		if (priv->phy_mode[i] == PHY_INTERFACE_MODE_SGMII)
 			bmcr[i] = sja1105_sgmii_read(priv, i,
 						     MDIO_MMD_VEND2,
 						     MDIO_CTRL1);
@@ -1942,7 +1943,7 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 		if (rc < 0)
 			goto out;
 
-		if (!sja1105_supports_sgmii(priv, i))
+		if (priv->phy_mode[i] != PHY_INTERFACE_MODE_SGMII)
 			continue;
 
 		an_enabled = !!(bmcr[i] & BMCR_ANENABLE);
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c
index 615e0906b1fa..565b594efa7d 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -482,6 +482,9 @@ const struct sja1105_info sja1105e_info = {
 	.ptp_cmd_packing	= sja1105et_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105et_regs,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
 	.name			= "SJA1105E",
 };
 
@@ -502,6 +505,9 @@ const struct sja1105_info sja1105t_info = {
 	.ptp_cmd_packing	= sja1105et_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105et_regs,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
 	.name			= "SJA1105T",
 };
 
@@ -523,6 +529,9 @@ const struct sja1105_info sja1105p_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
 	.name			= "SJA1105P",
 };
 
@@ -544,6 +553,9 @@ const struct sja1105_info sja1105q_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
 	.name			= "SJA1105Q",
 };
 
@@ -565,6 +577,10 @@ const struct sja1105_info sja1105r_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
+	.supports_sgmii		= {false, false, false, false, true},
 	.name			= "SJA1105R",
 };
 
@@ -586,5 +602,9 @@ const struct sja1105_info sja1105s_info = {
 	.fdb_del_cmd		= sja1105pqrs_fdb_del,
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
+	.supports_mii		= {true, true, true, true, true},
+	.supports_rmii		= {true, true, true, true, true},
+	.supports_rgmii		= {true, true, true, true, true},
+	.supports_sgmii		= {false, false, false, false, true},
 	.name			= "SJA1105S",
 };
-- 
2.25.1

[PATCH v3 net-next 6/8] net: dsa: sja1105: add a translation table for port speeds

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

In order to support the new speed of 2500Mbps, the SJA1110 has achieved
the great performance of changing the encoding in the MAC Configuration
Table for the port speeds of 10, 100, 1000 compared to SJA1105.

Because this is a common driver, we need a layer of indirection in order
to program the hardware with the right values irrespective of switch
generation.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105.h          | 17 +++++----
 drivers/net/dsa/sja1105/sja1105_clocking.c | 22 +++++-------
 drivers/net/dsa/sja1105/sja1105_main.c     | 38 ++++++++++++--------
 drivers/net/dsa/sja1105/sja1105_spi.c      | 42 ++++++++++++++++++++++
 4 files changed, 84 insertions(+), 35 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105.h b/drivers/net/dsa/sja1105/sja1105.h
index a27841642693..867cda832e77 100644
--- a/drivers/net/dsa/sja1105/sja1105.h
+++ b/drivers/net/dsa/sja1105/sja1105.h
@@ -72,6 +72,15 @@ struct sja1105_regs {
 	u64 stats[__MAX_SJA1105_STATS_AREA][SJA1105_MAX_NUM_PORTS];
 };
 
+enum {
+	SJA1105_SPEED_AUTO,
+	SJA1105_SPEED_10MBPS,
+	SJA1105_SPEED_100MBPS,
+	SJA1105_SPEED_1000MBPS,
+	SJA1105_SPEED_2500MBPS,
+	SJA1105_SPEED_MAX,
+};
+
 struct sja1105_info {
 	u64 device_id;
 	/* Needed for distinction between P and R, and between Q and S
@@ -116,6 +125,7 @@ struct sja1105_info {
 	bool supports_rgmii[SJA1105_MAX_NUM_PORTS];
 	bool supports_sgmii[SJA1105_MAX_NUM_PORTS];
 	bool supports_2500basex[SJA1105_MAX_NUM_PORTS];
+	const u64 port_speed[SJA1105_SPEED_MAX];
 };
 
 enum sja1105_key_type {
@@ -314,13 +324,6 @@ typedef enum {
 	XMII_MODE_SGMII		= 3,
 } sja1105_phy_interface_t;
 
-typedef enum {
-	SJA1105_SPEED_10MBPS	= 3,
-	SJA1105_SPEED_100MBPS	= 2,
-	SJA1105_SPEED_1000MBPS	= 1,
-	SJA1105_SPEED_AUTO	= 0,
-} sja1105_speed_t;
-
 int sja1105pqrs_setup_rgmii_delay(const void *ctx, int port);
 int sja1105_clocking_setup_port(struct sja1105_private *priv, int port);
 int sja1105_clocking_setup(struct sja1105_private *priv);
diff --git a/drivers/net/dsa/sja1105/sja1105_clocking.c b/drivers/net/dsa/sja1105/sja1105_clocking.c
index 4697ac064abc..03173397d950 100644
--- a/drivers/net/dsa/sja1105/sja1105_clocking.c
+++ b/drivers/net/dsa/sja1105/sja1105_clocking.c
@@ -328,7 +328,7 @@ sja1105_cgu_pll_control_packing(void *buf, struct sja1105_cgu_pll_ctrl *cmd,
 }
 
 static int sja1105_cgu_rgmii_tx_clk_config(struct sja1105_private *priv,
-					   int port, sja1105_speed_t speed)
+					   int port, u64 speed)
 {
 	const struct sja1105_regs *regs = priv->info->regs;
 	struct sja1105_cgu_mii_ctrl txc;
@@ -338,7 +338,7 @@ static int sja1105_cgu_rgmii_tx_clk_config(struct sja1105_private *priv,
 	if (regs->rgmii_tx_clk[port] == SJA1105_RSV_ADDR)
 		return 0;
 
-	if (speed == SJA1105_SPEED_1000MBPS) {
+	if (speed == priv->info->port_speed[SJA1105_SPEED_1000MBPS]) {
 		clksrc = CLKSRC_PLL0;
 	} else {
 		int clk_sources[] = {CLKSRC_IDIV0, CLKSRC_IDIV1, CLKSRC_IDIV2,
@@ -524,35 +524,31 @@ static int sja1105_rgmii_clocking_setup(struct sja1105_private *priv, int port,
 {
 	struct device *dev = priv->ds->dev;
 	struct sja1105_mac_config_entry *mac;
-	sja1105_speed_t speed;
+	u64 speed;
 	int rc;
 
 	mac = priv->static_config.tables[BLK_IDX_MAC_CONFIG].entries;
 	speed = mac[port].speed;
 
-	dev_dbg(dev, "Configuring port %d RGMII at speed %dMbps\n",
+	dev_dbg(dev, "Configuring port %d RGMII at speed %lldMbps\n",
 		port, speed);
 
-	switch (speed) {
-	case SJA1105_SPEED_1000MBPS:
+	if (speed == priv->info->port_speed[SJA1105_SPEED_1000MBPS]) {
 		/* 1000Mbps, IDIV disabled (125 MHz) */
 		rc = sja1105_cgu_idiv_config(priv, port, false, 1);
-		break;
-	case SJA1105_SPEED_100MBPS:
+	} else if (speed == priv->info->port_speed[SJA1105_SPEED_100MBPS]) {
 		/* 100Mbps, IDIV enabled, divide by 1 (25 MHz) */
 		rc = sja1105_cgu_idiv_config(priv, port, true, 1);
-		break;
-	case SJA1105_SPEED_10MBPS:
+	} else if (speed == priv->info->port_speed[SJA1105_SPEED_10MBPS]) {
 		/* 10Mbps, IDIV enabled, divide by 10 (2.5 MHz) */
 		rc = sja1105_cgu_idiv_config(priv, port, true, 10);
-		break;
-	case SJA1105_SPEED_AUTO:
+	} else if (speed == priv->info->port_speed[SJA1105_SPEED_AUTO]) {
 		/* Skip CGU configuration if there is no speed available
 		 * (e.g. link is not established yet)
 		 */
 		dev_dbg(dev, "Speed not available, skipping CGU config\n");
 		return 0;
-	default:
+	} else {
 		rc = -EINVAL;
 	}
 
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 3682b04d37cb..5beafe003268 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -80,7 +80,7 @@ static int sja1105_init_mac_settings(struct sja1105_private *priv)
 		/* Always put the MAC speed in automatic mode, where it can be
 		 * adjusted at runtime by PHYLINK.
 		 */
-		.speed = SJA1105_SPEED_AUTO,
+		.speed = priv->info->port_speed[SJA1105_SPEED_AUTO],
 		/* No static correction for 1-step 1588 events */
 		.tp_delin = 0,
 		.tp_delout = 0,
@@ -990,12 +990,19 @@ static void sja1105_sgmii_pcs_force_speed(struct sja1105_private *priv,
 }
 
 /* Convert link speed from SJA1105 to ethtool encoding */
-static int sja1105_speed[] = {
-	[SJA1105_SPEED_AUTO]		= SPEED_UNKNOWN,
-	[SJA1105_SPEED_10MBPS]		= SPEED_10,
-	[SJA1105_SPEED_100MBPS]		= SPEED_100,
-	[SJA1105_SPEED_1000MBPS]	= SPEED_1000,
-};
+static int sja1105_port_speed_to_ethtool(struct sja1105_private *priv,
+					 u64 speed)
+{
+	if (speed == priv->info->port_speed[SJA1105_SPEED_10MBPS])
+		return SPEED_10;
+	if (speed == priv->info->port_speed[SJA1105_SPEED_100MBPS])
+		return SPEED_100;
+	if (speed == priv->info->port_speed[SJA1105_SPEED_1000MBPS])
+		return SPEED_1000;
+	if (speed == priv->info->port_speed[SJA1105_SPEED_2500MBPS])
+		return SPEED_2500;
+	return SPEED_UNKNOWN;
+}
 
 /* Set link speed in the MAC configuration for a specific port. */
 static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
@@ -1003,7 +1010,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 {
 	struct sja1105_mac_config_entry *mac;
 	struct device *dev = priv->ds->dev;
-	sja1105_speed_t speed;
+	u64 speed;
 	int rc;
 
 	/* On P/Q/R/S, one can read from the device via the MAC reconfiguration
@@ -1023,16 +1030,16 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 		 * ok for power consumption in case AN will never complete -
 		 * otherwise PHYLINK should come back with a new update.
 		 */
-		speed = SJA1105_SPEED_AUTO;
+		speed = priv->info->port_speed[SJA1105_SPEED_AUTO];
 		break;
 	case SPEED_10:
-		speed = SJA1105_SPEED_10MBPS;
+		speed = priv->info->port_speed[SJA1105_SPEED_10MBPS];
 		break;
 	case SPEED_100:
-		speed = SJA1105_SPEED_100MBPS;
+		speed = priv->info->port_speed[SJA1105_SPEED_100MBPS];
 		break;
 	case SPEED_1000:
-		speed = SJA1105_SPEED_1000MBPS;
+		speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
 		break;
 	default:
 		dev_err(dev, "Invalid speed %iMbps\n", speed_mbps);
@@ -1047,7 +1054,7 @@ static int sja1105_adjust_port_config(struct sja1105_private *priv, int port,
 	 * we need to configure the PCS only (if even that).
 	 */
 	if (priv->phy_mode[port] == PHY_INTERFACE_MODE_SGMII)
-		mac[port].speed = SJA1105_SPEED_1000MBPS;
+		mac[port].speed = priv->info->port_speed[SJA1105_SPEED_1000MBPS];
 	else
 		mac[port].speed = speed;
 
@@ -1883,8 +1890,9 @@ int sja1105_static_config_reload(struct sja1105_private *priv,
 	 * change it through the dynamic interface later.
 	 */
 	for (i = 0; i < ds->num_ports; i++) {
-		speed_mbps[i] = sja1105_speed[mac[i].speed];
-		mac[i].speed = SJA1105_SPEED_AUTO;
+		speed_mbps[i] = sja1105_port_speed_to_ethtool(priv,
+							      mac[i].speed);
+		mac[i].speed = priv->info->port_speed[SJA1105_SPEED_AUTO];
 
 		if (priv->phy_mode[i] == PHY_INTERFACE_MODE_SGMII)
 			bmcr[i] = sja1105_sgmii_read(priv, i,
diff --git a/drivers/net/dsa/sja1105/sja1105_spi.c b/drivers/net/dsa/sja1105/sja1105_spi.c
index 565b594efa7d..786c16a77e46 100644
--- a/drivers/net/dsa/sja1105/sja1105_spi.c
+++ b/drivers/net/dsa/sja1105/sja1105_spi.c
@@ -482,6 +482,13 @@ const struct sja1105_info sja1105e_info = {
 	.ptp_cmd_packing	= sja1105et_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105et_regs,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
@@ -505,6 +512,13 @@ const struct sja1105_info sja1105t_info = {
 	.ptp_cmd_packing	= sja1105et_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105et_regs,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
@@ -529,6 +543,13 @@ const struct sja1105_info sja1105p_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
@@ -553,6 +574,13 @@ const struct sja1105_info sja1105q_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
@@ -577,6 +605,13 @@ const struct sja1105_info sja1105r_info = {
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
 	.regs			= &sja1105pqrs_regs,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
@@ -602,6 +637,13 @@ const struct sja1105_info sja1105s_info = {
 	.fdb_del_cmd		= sja1105pqrs_fdb_del,
 	.ptp_cmd_packing	= sja1105pqrs_ptp_cmd_packing,
 	.clocking_setup		= sja1105_clocking_setup,
+	.port_speed		= {
+		[SJA1105_SPEED_AUTO] = 0,
+		[SJA1105_SPEED_10MBPS] = 3,
+		[SJA1105_SPEED_100MBPS] = 2,
+		[SJA1105_SPEED_1000MBPS] = 1,
+		[SJA1105_SPEED_2500MBPS] = 0, /* Not supported */
+	},
 	.supports_mii		= {true, true, true, true, true},
 	.supports_rmii		= {true, true, true, true, true},
 	.supports_rgmii		= {true, true, true, true, true},
-- 
2.25.1

[PATCH v3 net-next 7/8] net: dsa: sja1105: always keep RGMII ports in the MAC role

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

In SJA1105, the xMII Mode Parameters Table field called PHY_MAC denotes
the 'role' of the port, be it a PHY or a MAC. This makes a difference in
the MII and RMII protocols, but RGMII is symmetric, so either PHY or MAC
settings result in the same hardware behavior.

The SJA1110 is different, and the RGMII ports only work when configured
in MAC mode, so keep the port roles in MAC mode unconditionally.

Why we had an RGMII port in the PHY role in the first place was because
we wanted to have a way in the driver to denote whether RGMII delays
should be applied based on the phy-mode property or not. This is already
done in sja1105_parse_rgmii_delays() based on an intermediary
struct sja1105_dt_port (which contains the port role). So it is a
logical fallacy to use the hardware configuration as a scratchpad for
driver data, it isn't necessary.

We can also remove the gating condition for applying RGMII delays only
for ports in the PHY role. The .setup_rgmii_delay() method looks at
the priv->rgmii_rx_delay[port] and priv->rgmii_tx_delay[port] properties
which are already populated properly (in the case of a port in the MAC
role they are false). Removing this condition generates a few more SPI
writes for these ports (clearing the RGMII delays) which are perhaps
useless for SJA1105P/Q/R/S, where we know that the delays are disabled
by default. But for SJA1110, the firmware on the embedded microcontroller
might have done something funny, so it's always a good idea to clear the
RGMII delays if that's what Linux expects.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105_clocking.c | 7 +------
 drivers/net/dsa/sja1105/sja1105_main.c     | 8 +++++++-
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_clocking.c b/drivers/net/dsa/sja1105/sja1105_clocking.c
index 03173397d950..ae297648611f 100644
--- a/drivers/net/dsa/sja1105/sja1105_clocking.c
+++ b/drivers/net/dsa/sja1105/sja1105_clocking.c
@@ -566,14 +566,9 @@ static int sja1105_rgmii_clocking_setup(struct sja1105_private *priv, int port,
 		dev_err(dev, "Failed to configure Tx pad registers\n");
 		return rc;
 	}
+
 	if (!priv->info->setup_rgmii_delay)
 		return 0;
-	/* The role has no hardware effect for RGMII. However we use it as
-	 * a proxy for this interface being a MAC-to-MAC connection, with
-	 * the RGMII internal delays needing to be applied by us.
-	 */
-	if (role == XMII_MAC)
-		return 0;
 
 	return priv->info->setup_rgmii_delay(priv, port);
 }
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 5beafe003268..84edd054781b 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -218,8 +218,14 @@ static int sja1105_init_mii_settings(struct sja1105_private *priv,
 		/* Even though the SerDes port is able to drive SGMII autoneg
 		 * like a PHY would, from the perspective of the XMII tables,
 		 * the SGMII port should always be put in MAC mode.
+		 * Similarly, RGMII is a symmetric protocol electrically
+		 * speaking, and the 'RGMII PHY' role does not mean anything to
+		 * hardware. Just keep the 'PHY role' notation relevant to the
+		 * driver to mean 'the switch port should apply RGMII delays',
+		 * but unconditionally put the port in the MAC role.
 		 */
-		if (ports[i].phy_mode == PHY_INTERFACE_MODE_SGMII)
+		if (ports[i].phy_mode == PHY_INTERFACE_MODE_SGMII ||
+		    phy_interface_mode_is_rgmii(ports[i].phy_mode))
 			mii->phy_mac[i] = XMII_MAC;
 		else
 			mii->phy_mac[i] = ports[i].role;
-- 
2.25.1

[PATCH v3 net-next 8/8] net: dsa: sja1105: some table entries are always present when read dynamically

[Vladimir Oltean]

From: Vladimir Oltean <vladimir.oltean@nxp.com>

The SJA1105 has a static configuration comprised of a number of tables
with entries. Some of these can be read and modified at runtime as well,
through the dynamic configuration interface.

As a careful reader can notice from the comments in this file, the
software interface for accessing a table entry through the dynamic
reconfiguration is a bit of a no man's land, and varies wildly across
switch generations and even from one kind of table to another.

I have tried my best to come up with a software representation of a
'common denominator' SPI command to access a table entry through the
dynamic configuration interface:

struct sja1105_dyn_cmd {
	bool search;
	u64 valid; /* must be set to 1 */
	u64 rdwrset; /* 0 to read, 1 to write */
	u64 errors;
	u64 valident; /* 0 if entry is invalid, 1 if valid */
	u64 index;
};

Relevant to this patch is the VALIDENT bit, which for READ commands is
populated by the switch and lets us know if we're looking at junk or at
a real table entry.

In SJA1105, the dynamic reconfiguration interface for management routes
has notably not implemented the VALIDENT bit, leading to a workaround to
ignore this field in sja1105_dynamic_config_read(), as it will be set to
zero, but the data is valid nonetheless.

In SJA1110, this pattern has sadly been abused to death, and while there
are many more tables which can be read back over the dynamic config
interface compared to SJA1105, their handling isn't in any way more
uniform. Generally speaking, if there is a single possible entry in a
given table, and loading that table in the static config is mandatory as
per the documentation, then the VALIDENT bit is deemed as redundant and
more than likely not implemented.

So it is time to make the workaround more official, and add a bit to the
flags implemented by dynamic config tables. It will be used by more
tables when SJA1110 support arrives.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
---
Changes in v3:
None.

Changes in v2:
None.

 drivers/net/dsa/sja1105/sja1105_dynamic_config.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
index 12cd04b56803..ff2742f53de3 100644
--- a/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
+++ b/drivers/net/dsa/sja1105/sja1105_dynamic_config.c
@@ -78,6 +78,9 @@
  *		   on its ENTRY portion, as a result of a SPI write command.
  *		   Only the TCAM-based FDB table on SJA1105 P/Q/R/S supports
  *		   this.
+ *	OP_VALID_ANYWAY: Reading some tables through the dynamic config
+ *			 interface is possible even if the VALIDENT bit is not
+ *			 set in the writeback. So don't error out in that case.
  * - .max_entry_count: The number of entries, counting from zero, that can be
  *		       reconfigured through the dynamic interface. If a static
  *		       table can be reconfigured at all dynamically, this
@@ -651,6 +654,7 @@ static size_t sja1105pqrs_cbs_entry_packing(void *buf, void *entry_ptr,
 #define OP_WRITE	BIT(1)
 #define OP_DEL		BIT(2)
 #define OP_SEARCH	BIT(3)
+#define OP_VALID_ANYWAY	BIT(4)
 
 /* SJA1105E/T: First generation */
 const struct sja1105_dynamic_table_ops sja1105et_dyn_ops[BLK_IDX_MAX_DYN] = {
@@ -673,7 +677,7 @@ const struct sja1105_dynamic_table_ops sja1105et_dyn_ops[BLK_IDX_MAX_DYN] = {
 	[BLK_IDX_MGMT_ROUTE] = {
 		.entry_packing = sja1105et_mgmt_route_entry_packing,
 		.cmd_packing = sja1105et_mgmt_route_cmd_packing,
-		.access = (OP_READ | OP_WRITE),
+		.access = (OP_READ | OP_WRITE | OP_VALID_ANYWAY),
 		.max_entry_count = SJA1105_NUM_PORTS,
 		.packed_size = SJA1105ET_SIZE_L2_LOOKUP_DYN_CMD,
 		.addr = 0x20,
@@ -757,7 +761,7 @@ const struct sja1105_dynamic_table_ops sja1105pqrs_dyn_ops[BLK_IDX_MAX_DYN] = {
 	[BLK_IDX_MGMT_ROUTE] = {
 		.entry_packing = sja1105pqrs_mgmt_route_entry_packing,
 		.cmd_packing = sja1105pqrs_mgmt_route_cmd_packing,
-		.access = (OP_READ | OP_WRITE | OP_DEL | OP_SEARCH),
+		.access = (OP_READ | OP_WRITE | OP_DEL | OP_SEARCH | OP_VALID_ANYWAY),
 		.max_entry_count = SJA1105_NUM_PORTS,
 		.packed_size = SJA1105PQRS_SIZE_L2_LOOKUP_DYN_CMD,
 		.addr = 0x24,
@@ -911,11 +915,8 @@ int sja1105_dynamic_config_read(struct sja1105_private *priv,
 
 		cmd = (struct sja1105_dyn_cmd) {0};
 		ops->cmd_packing(packed_buf, &cmd, UNPACK);
-		/* UM10944: [valident] will always be found cleared
-		 * during a read access with MGMTROUTE set.
-		 * So don't error out in that case.
-		 */
-		if (!cmd.valident && blk_idx != BLK_IDX_MGMT_ROUTE)
+
+		if (!cmd.valident && !(ops->access & OP_VALID_ANYWAY))
 			return -ENOENT;
 		cpu_relax();
 	} while (cmd.valid && --retries);
-- 
2.25.1

Re: [PATCH v3 net-next 0/8] Part 2 of SJA1105 DSA driver preparation for new switch introduction (SJA1110)

[patchwork-bot+netdevbpf]

Hello:

This series was applied to netdev/net-next.git (refs/heads/master):

On Mon, 31 May 2021 01:59:31 +0300 you wrote:
> From: Vladimir Oltean <vladimir.oltean@nxp.com>
> 
> This series is a continuation of:
> https://patchwork.kernel.org/project/netdevbpf/cover/20210524131421.1030789-1-olteanv@gmail.com/
> 
> even though it isn't the first time these patches are submitted (they
> were part of the group previously called "Add NXP SJA1110 support to the
> sja1105 DSA driver"):
> https://patchwork.kernel.org/project/netdevbpf/cover/20210526135535.2515123-1-vladimir.oltean@nxp.com/
> 
> [...]

Here is the summary with links:
  - [v3,net-next,1/8] net: dsa: sja1105: be compatible with "ethernet-ports" OF node name
    https://git.kernel.org/netdev/net-next/c/15074a361fee
  - [v3,net-next,2/8] net: dsa: sja1105: allow SGMII PCS configuration to be per port
    https://git.kernel.org/netdev/net-next/c/84db00f2c043
  - [v3,net-next,3/8] net: dsa: sja1105: the 0x1F0000 SGMII "base address" is actually MDIO_MMD_VEND2
    https://git.kernel.org/netdev/net-next/c/4c7ee010cf75
  - [v3,net-next,4/8] net: dsa: sja1105: cache the phy-mode port property
    https://git.kernel.org/netdev/net-next/c/bf4edf4afb87
  - [v3,net-next,5/8] net: dsa: sja1105: add a PHY interface type compatibility matrix
    https://git.kernel.org/netdev/net-next/c/91a050782cbf
  - [v3,net-next,6/8] net: dsa: sja1105: add a translation table for port speeds
    https://git.kernel.org/netdev/net-next/c/41fed17fdbe5
  - [v3,net-next,7/8] net: dsa: sja1105: always keep RGMII ports in the MAC role
    https://git.kernel.org/netdev/net-next/c/f41fad3cb8b7
  - [v3,net-next,8/8] net: dsa: sja1105: some table entries are always present when read dynamically
    https://git.kernel.org/netdev/net-next/c/96c85f51f123

You are awesome, thank you!
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