[PATCH net-next 0/3] net: dsa: MT7530: Convert to PHYLINK and add support for port 5

[PATCH net-next 0/3] net: dsa: MT7530: Convert to PHYLINK and add support for port 5

[René van Dorst]

1. net: dsa: mt7530: Convert to PHYLINK API
   This patch converts mt7530 to PHYLINK API.
2. dt-bindings: net: dsa: mt7530: Add support for port 5
3. net: dsa: mt7530: Add support for port 5
   These 2 patches adding support for port 5 of the switch.

rfc -> v1:
 * Mostly phylink improvements after review.
 * Drop phy isolation patches. Adds no value for now.

René van Dorst (3):
  net: dsa: mt7530: Convert to PHYLINK API
  dt-bindings: net: dsa: mt7530: Add support for port 5
  net: dsa: mt7530: Add support for port 5

 .../devicetree/bindings/net/dsa/mt7530.txt    | 215 +++++++++++
 drivers/net/dsa/mt7530.c                      | 356 +++++++++++++++---
 drivers/net/dsa/mt7530.h                      |  60 ++-
 3 files changed, 561 insertions(+), 70 deletions(-)

To: <netdev@vger.kernel.org>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: David S. Miller <davem@davemloft.net>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: Frank Wunderlich <frank-w@public-files.de>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-mediatek@lists.infradead.org
Cc: linux-mips@vger.kernel.org
Cc: John Crispin <john@phrozen.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Vivien Didelot <vivien.didelot@gmail.com>

-- 
2.20.1

[PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

[René van Dorst]

Convert mt7530 to PHYLINK API

Signed-off-by: René van Dorst <opensource@vdorst.com>

rfc->v1:
* Renamed P5_MODE_* to P5_INTF_SEL_*. fits the function more
* Convert if-statement for speed bits to a switch suggested by
  Daniel Santos
* Refactor flow_control pause bits and don't use state->link in
  mt7530_phylink_mac_config() suggested by Russell King
* Move MAC tx/rx en/disable to mt7530_phylink_mac_link_up/down()
  suggested by Russell King
* Always support PHY_INTERFACE_MODE_NA in mt7530_phylink_validate()
  suggested by Russell King
* Added phylink_set_port_modes() in mt7530_phylink_validate() suggested
  by Russell King
* Remove dev_err on the end of mt7530_phylink_mac_config() suggested by
  Russell King
---
 drivers/net/dsa/mt7530.c | 255 +++++++++++++++++++++++++++++----------
 drivers/net/dsa/mt7530.h |  32 +++--
 2 files changed, 203 insertions(+), 84 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 3181e95586d6..73a2204bf81a 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -13,7 +13,7 @@
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/of_platform.h>
-#include <linux/phy.h>
+#include <linux/phylink.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 #include <linux/reset.h>
@@ -633,63 +633,6 @@ mt7530_get_sset_count(struct dsa_switch *ds, int port, int sset)
 	return ARRAY_SIZE(mt7530_mib);
 }
 
-static void mt7530_adjust_link(struct dsa_switch *ds, int port,
-			       struct phy_device *phydev)
-{
-	struct mt7530_priv *priv = ds->priv;
-
-	if (phy_is_pseudo_fixed_link(phydev)) {
-		dev_dbg(priv->dev, "phy-mode for master device = %x\n",
-			phydev->interface);
-
-		/* Setup TX circuit incluing relevant PAD and driving */
-		mt7530_pad_clk_setup(ds, phydev->interface);
-
-		if (priv->id == ID_MT7530) {
-			/* Setup RX circuit, relevant PAD and driving on the
-			 * host which must be placed after the setup on the
-			 * device side is all finished.
-			 */
-			mt7623_pad_clk_setup(ds);
-		}
-	} else {
-		u16 lcl_adv = 0, rmt_adv = 0;
-		u8 flowctrl;
-		u32 mcr = PMCR_USERP_LINK | PMCR_FORCE_MODE;
-
-		switch (phydev->speed) {
-		case SPEED_1000:
-			mcr |= PMCR_FORCE_SPEED_1000;
-			break;
-		case SPEED_100:
-			mcr |= PMCR_FORCE_SPEED_100;
-			break;
-		}
-
-		if (phydev->link)
-			mcr |= PMCR_FORCE_LNK;
-
-		if (phydev->duplex) {
-			mcr |= PMCR_FORCE_FDX;
-
-			if (phydev->pause)
-				rmt_adv = LPA_PAUSE_CAP;
-			if (phydev->asym_pause)
-				rmt_adv |= LPA_PAUSE_ASYM;
-
-			lcl_adv = linkmode_adv_to_lcl_adv_t(
-				phydev->advertising);
-			flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
-
-			if (flowctrl & FLOW_CTRL_TX)
-				mcr |= PMCR_TX_FC_EN;
-			if (flowctrl & FLOW_CTRL_RX)
-				mcr |= PMCR_RX_FC_EN;
-		}
-		mt7530_write(priv, MT7530_PMCR_P(port), mcr);
-	}
-}
-
 static int
 mt7530_cpu_port_enable(struct mt7530_priv *priv,
 		       int port)
@@ -698,9 +641,6 @@ mt7530_cpu_port_enable(struct mt7530_priv *priv,
 	mt7530_write(priv, MT7530_PVC_P(port),
 		     PORT_SPEC_TAG);
 
-	/* Setup the MAC by default for the cpu port */
-	mt7530_write(priv, MT7530_PMCR_P(port), PMCR_CPUP_LINK);
-
 	/* Disable auto learning on the cpu port */
 	mt7530_set(priv, MT7530_PSC_P(port), SA_DIS);
 
@@ -728,9 +668,6 @@ mt7530_port_enable(struct dsa_switch *ds, int port,
 
 	mutex_lock(&priv->reg_mutex);
 
-	/* Setup the MAC for the user port */
-	mt7530_write(priv, MT7530_PMCR_P(port), PMCR_USERP_LINK);
-
 	/* Allow the user port gets connected to the cpu port and also
 	 * restore the port matrix if the port is the member of a certain
 	 * bridge.
@@ -739,7 +676,7 @@ mt7530_port_enable(struct dsa_switch *ds, int port,
 	priv->ports[port].enable = true;
 	mt7530_rmw(priv, MT7530_PCR_P(port), PCR_MATRIX_MASK,
 		   priv->ports[port].pm);
-	mt7530_port_set_status(priv, port, 1);
+	mt7530_port_set_status(priv, port, 0);
 
 	mutex_unlock(&priv->reg_mutex);
 
@@ -1299,6 +1236,8 @@ mt7530_setup(struct dsa_switch *ds)
 	val |= MHWTRAP_MANUAL;
 	mt7530_write(priv, MT7530_MHWTRAP, val);
 
+	priv->p6_interface = PHY_INTERFACE_MODE_NA;
+
 	/* Enable and reset MIB counters */
 	mt7530_mib_reset(ds);
 
@@ -1323,6 +1262,186 @@ mt7530_setup(struct dsa_switch *ds)
 	return 0;
 }
 
+static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
+				      unsigned int mode,
+				      const struct phylink_link_state *state)
+{
+	struct mt7530_priv *priv = ds->priv;
+	u32 mcr_cur, mcr_new;
+
+	switch (port) {
+	case 0: /* Internal phy */
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		if (state->interface != PHY_INTERFACE_MODE_GMII)
+			return;
+		break;
+	/* case 5: Port 5 is not supported! */
+	case 6: /* 1st cpu port */
+		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
+		    state->interface != PHY_INTERFACE_MODE_TRGMII)
+			return;
+
+		if (priv->p6_interface == state->interface)
+			break;
+		/* Setup TX circuit incluing relevant PAD and driving */
+		mt7530_pad_clk_setup(ds, state->interface);
+
+		if (priv->id == ID_MT7530) {
+			/* Setup RX circuit, relevant PAD and driving on the
+			 * host which must be placed after the setup on the
+			 * device side is all finished.
+			 */
+			mt7623_pad_clk_setup(ds);
+		}
+		priv->p6_interface = state->interface;
+		break;
+	default:
+		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
+		return;
+	}
+
+	mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
+	mcr_new = mcr_cur;
+	mcr_new &= ~(PMCR_FORCE_SPEED_1000 | PMCR_FORCE_SPEED_100 |
+		     PMCR_FORCE_FDX | PMCR_TX_FC_EN | PMCR_RX_FC_EN);
+	mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN |
+		   PMCR_BACKPR_EN | PMCR_FORCE_MODE | PMCR_FORCE_LNK;
+
+	switch (state->speed) {
+	case SPEED_1000:
+		mcr_new |= PMCR_FORCE_SPEED_1000;
+		break;
+	case SPEED_100:
+		mcr_new |= PMCR_FORCE_SPEED_100;
+		break;
+	}
+	if (state->duplex == DUPLEX_FULL) {
+		mcr_new |= PMCR_FORCE_FDX;
+		if (state->pause & MLO_PAUSE_TX)
+			mcr_new |= PMCR_TX_FC_EN;
+		if (state->pause & MLO_PAUSE_RX)
+			mcr_new |= PMCR_RX_FC_EN;
+	}
+
+	if (mcr_new != mcr_cur)
+		mt7530_write(priv, MT7530_PMCR_P(port), mcr_new);
+}
+
+static void mt7530_phylink_mac_link_down(struct dsa_switch *ds, int port,
+					 unsigned int mode,
+					 phy_interface_t interface)
+{
+	struct mt7530_priv *priv = ds->priv;
+
+	mt7530_port_set_status(priv, port, 0);
+}
+
+static void mt7530_phylink_mac_link_up(struct dsa_switch *ds, int port,
+				       unsigned int mode,
+				       phy_interface_t interface,
+				       struct phy_device *phydev)
+{
+	struct mt7530_priv *priv = ds->priv;
+
+	mt7530_port_set_status(priv, port, 1);
+}
+
+static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
+				    unsigned long *supported,
+				    struct phylink_link_state *state)
+{
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
+
+	switch (port) {
+	case 0: /* Internal phy */
+	case 1:
+	case 2:
+	case 3:
+	case 4:
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			goto unsupported;
+		break;
+	/* case 5: Port 5 not supported! */
+	case 6: /* 1st cpu port */
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    state->interface != PHY_INTERFACE_MODE_RGMII &&
+		    state->interface != PHY_INTERFACE_MODE_TRGMII)
+			goto unsupported;
+		break;
+	default:
+		linkmode_zero(supported);
+		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
+		return;
+	}
+
+	phylink_set_port_modes(mask);
+	phylink_set(mask, Autoneg);
+
+	if (state->interface != PHY_INTERFACE_MODE_TRGMII) {
+		phylink_set(mask, 10baseT_Half);
+		phylink_set(mask, 10baseT_Full);
+		phylink_set(mask, 100baseT_Half);
+		phylink_set(mask, 100baseT_Full);
+		phylink_set(mask, 1000baseT_Half);
+	}
+
+	phylink_set(mask, 1000baseT_Full);
+
+	phylink_set(mask, Pause);
+	phylink_set(mask, Asym_Pause);
+
+	linkmode_and(supported, supported, mask);
+	linkmode_and(state->advertising, state->advertising, mask);
+	return;
+
+unsupported:
+	linkmode_zero(supported);
+}
+
+static int
+mt7530_phylink_mac_link_state(struct dsa_switch *ds, int port,
+			      struct phylink_link_state *state)
+{
+	struct mt7530_priv *priv = ds->priv;
+	u32 pmsr;
+
+	if (port < 0 || port >= MT7530_NUM_PORTS)
+		return -EINVAL;
+
+	pmsr = mt7530_read(priv, MT7530_PMSR_P(port));
+
+	state->link = (pmsr & PMSR_LINK);
+	state->an_complete = state->link;
+	state->duplex = !!(pmsr & PMSR_DPX);
+
+	switch (pmsr & PMSR_SPEED_MASK) {
+	case PMSR_SPEED_10:
+		state->speed = SPEED_10;
+		break;
+	case PMSR_SPEED_100:
+		state->speed = SPEED_100;
+		break;
+	case PMSR_SPEED_1000:
+		state->speed = SPEED_1000;
+		break;
+	default:
+		state->speed = SPEED_UNKNOWN;
+		break;
+	}
+
+	state->pause &= ~(MLO_PAUSE_RX | MLO_PAUSE_TX);
+	if (pmsr & PMSR_RX_FC)
+		state->pause |= MLO_PAUSE_RX;
+	if (pmsr & PMSR_TX_FC)
+		state->pause |= MLO_PAUSE_TX;
+
+	return 1;
+}
+
 static const struct dsa_switch_ops mt7530_switch_ops = {
 	.get_tag_protocol	= mtk_get_tag_protocol,
 	.setup			= mt7530_setup,
@@ -1331,7 +1450,6 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
 	.phy_write		= mt7530_phy_write,
 	.get_ethtool_stats	= mt7530_get_ethtool_stats,
 	.get_sset_count		= mt7530_get_sset_count,
-	.adjust_link		= mt7530_adjust_link,
 	.port_enable		= mt7530_port_enable,
 	.port_disable		= mt7530_port_disable,
 	.port_stp_state_set	= mt7530_stp_state_set,
@@ -1344,6 +1462,11 @@ static const struct dsa_switch_ops mt7530_switch_ops = {
 	.port_vlan_prepare	= mt7530_port_vlan_prepare,
 	.port_vlan_add		= mt7530_port_vlan_add,
 	.port_vlan_del		= mt7530_port_vlan_del,
+	.phylink_validate	= mt7530_phylink_validate,
+	.phylink_mac_link_state = mt7530_phylink_mac_link_state,
+	.phylink_mac_config	= mt7530_phylink_mac_config,
+	.phylink_mac_link_down	= mt7530_phylink_mac_link_down,
+	.phylink_mac_link_up	= mt7530_phylink_mac_link_up,
 };
 
 static const struct of_device_id mt7530_of_match[] = {
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index bfac90f48102..107dd04acede 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -198,26 +198,20 @@ enum mt7530_vlan_port_attr {
 #define  PMCR_FORCE_SPEED_100		BIT(2)
 #define  PMCR_FORCE_FDX			BIT(1)
 #define  PMCR_FORCE_LNK			BIT(0)
-#define  PMCR_COMMON_LINK		(PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | \
-					 PMCR_BACKOFF_EN | PMCR_BACKPR_EN | \
-					 PMCR_TX_EN | PMCR_RX_EN | \
-					 PMCR_TX_FC_EN | PMCR_RX_FC_EN)
-#define  PMCR_CPUP_LINK			(PMCR_COMMON_LINK | PMCR_FORCE_MODE | \
-					 PMCR_FORCE_SPEED_1000 | \
-					 PMCR_FORCE_FDX | \
-					 PMCR_FORCE_LNK)
-#define  PMCR_USERP_LINK		PMCR_COMMON_LINK
-#define  PMCR_FIXED_LINK		(PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | \
-					 PMCR_FORCE_MODE | PMCR_TX_EN | \
-					 PMCR_RX_EN | PMCR_BACKPR_EN | \
-					 PMCR_BACKOFF_EN | \
-					 PMCR_FORCE_SPEED_1000 | \
-					 PMCR_FORCE_FDX | \
-					 PMCR_FORCE_LNK)
-#define PMCR_FIXED_LINK_FC		(PMCR_FIXED_LINK | \
-					 PMCR_TX_FC_EN | PMCR_RX_FC_EN)
+#define  PMCR_SPEED_MASK		(PMCR_FORCE_SPEED_100 | \
+					 PMCR_FORCE_SPEED_1000)
 
 #define MT7530_PMSR_P(x)		(0x3008 + (x) * 0x100)
+#define  PMSR_EEE1G			BIT(7)
+#define  PMSR_EEE100M			BIT(6)
+#define  PMSR_RX_FC			BIT(5)
+#define  PMSR_TX_FC			BIT(4)
+#define  PMSR_SPEED_1000		BIT(3)
+#define  PMSR_SPEED_100			BIT(2)
+#define  PMSR_SPEED_10			0x00
+#define  PMSR_SPEED_MASK		(PMSR_SPEED_100 | PMSR_SPEED_1000)
+#define  PMSR_DPX			BIT(1)
+#define  PMSR_LINK			BIT(0)
 
 /* Register for MIB */
 #define MT7530_PORT_MIB_COUNTER(x)	(0x4000 + (x) * 0x100)
@@ -423,6 +417,7 @@ struct mt7530_port {
  * @ports:		Holding the state among ports
  * @reg_mutex:		The lock for protecting among process accessing
  *			registers
+ * @p6_interface	Holding the current port 6 interface
  */
 struct mt7530_priv {
 	struct device		*dev;
@@ -435,6 +430,7 @@ struct mt7530_priv {
 	struct gpio_desc	*reset;
 	unsigned int		id;
 	bool			mcm;
+	phy_interface_t		p6_interface;
 
 	struct mt7530_port	ports[MT7530_NUM_PORTS];
 	/* protect among processes for registers access*/
-- 
2.20.1

Re: [PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

[Russell King - ARM Linux admin]

Hi,

Just a couple of minor points.

On Wed, Jul 24, 2019 at 09:25:47PM +0200, René van Dorst wrote:
> +static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
> +				      unsigned int mode,
> +				      const struct phylink_link_state *state)
> +{
> +	struct mt7530_priv *priv = ds->priv;
> +	u32 mcr_cur, mcr_new;
> +
> +	switch (port) {
> +	case 0: /* Internal phy */
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:
> +		if (state->interface != PHY_INTERFACE_MODE_GMII)
> +			return;
> +		break;
> +	/* case 5: Port 5 is not supported! */
> +	case 6: /* 1st cpu port */
> +		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
> +		    state->interface != PHY_INTERFACE_MODE_TRGMII)
> +			return;
> +
> +		if (priv->p6_interface == state->interface)
> +			break;
> +		/* Setup TX circuit incluing relevant PAD and driving */
> +		mt7530_pad_clk_setup(ds, state->interface);
> +
> +		if (priv->id == ID_MT7530) {
> +			/* Setup RX circuit, relevant PAD and driving on the
> +			 * host which must be placed after the setup on the
> +			 * device side is all finished.
> +			 */
> +			mt7623_pad_clk_setup(ds);
> +		}
> +		priv->p6_interface = state->interface;
> +		break;
> +	default:
> +		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
> +		return;
> +	}

	if (phylink_autoneg_inband(mode)) {
		dev_err(ds->dev, "%s: in-band negotiation unsupported\n",
			__func__);
		return;
	}

or similar, since you don't support inband AN in this code path.

> +
> +	mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
> +	mcr_new = mcr_cur;
> +	mcr_new &= ~(PMCR_FORCE_SPEED_1000 | PMCR_FORCE_SPEED_100 |
> +		     PMCR_FORCE_FDX | PMCR_TX_FC_EN | PMCR_RX_FC_EN);
> +	mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN |
> +		   PMCR_BACKPR_EN | PMCR_FORCE_MODE | PMCR_FORCE_LNK;
> +
> +	switch (state->speed) {
> +	case SPEED_1000:
> +		mcr_new |= PMCR_FORCE_SPEED_1000;
> +		break;
> +	case SPEED_100:
> +		mcr_new |= PMCR_FORCE_SPEED_100;
> +		break;
> +	}
> +	if (state->duplex == DUPLEX_FULL) {
> +		mcr_new |= PMCR_FORCE_FDX;
> +		if (state->pause & MLO_PAUSE_TX)
> +			mcr_new |= PMCR_TX_FC_EN;
> +		if (state->pause & MLO_PAUSE_RX)
> +			mcr_new |= PMCR_RX_FC_EN;
> +	}
> +
> +	if (mcr_new != mcr_cur)
> +		mt7530_write(priv, MT7530_PMCR_P(port), mcr_new);
> +}
> +
> +static void mt7530_phylink_mac_link_down(struct dsa_switch *ds, int port,
> +					 unsigned int mode,
> +					 phy_interface_t interface)
> +{
> +	struct mt7530_priv *priv = ds->priv;
> +
> +	mt7530_port_set_status(priv, port, 0);
> +}
> +
> +static void mt7530_phylink_mac_link_up(struct dsa_switch *ds, int port,
> +				       unsigned int mode,
> +				       phy_interface_t interface,
> +				       struct phy_device *phydev)
> +{
> +	struct mt7530_priv *priv = ds->priv;
> +
> +	mt7530_port_set_status(priv, port, 1);
> +}
> +
> +static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
> +				    unsigned long *supported,
> +				    struct phylink_link_state *state)
> +{
> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
> +
> +	switch (port) {
> +	case 0: /* Internal phy */
> +	case 1:
> +	case 2:
> +	case 3:
> +	case 4:
> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
> +		    state->interface != PHY_INTERFACE_MODE_GMII)
> +			goto unsupported;
> +		break;
> +	/* case 5: Port 5 not supported! */
> +	case 6: /* 1st cpu port */
> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
> +		    state->interface != PHY_INTERFACE_MODE_RGMII &&
> +		    state->interface != PHY_INTERFACE_MODE_TRGMII)
> +			goto unsupported;
> +		break;
> +	default:
> +		linkmode_zero(supported);
> +		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);

You could reorder this as:

	default:
		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
	unsupported:
		linkmode_zero(supported);

and save having the "unsupported" at the end of the function.  Not sure
what DaveM would think of it though.


-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

Re: [PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

[René van Dorst]

Quoting Russell King - ARM Linux admin <linux@armlinux.org.uk>:

> Hi,
>
> Just a couple of minor points.
>
> On Wed, Jul 24, 2019 at 09:25:47PM +0200, René van Dorst wrote:

<snip>

>> +
>> +static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
>> +				    unsigned long *supported,
>> +				    struct phylink_link_state *state)
>> +{
>> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
>> +
>> +	switch (port) {
>> +	case 0: /* Internal phy */
>> +	case 1:
>> +	case 2:
>> +	case 3:
>> +	case 4:
>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>> +		    state->interface != PHY_INTERFACE_MODE_GMII)
>> +			goto unsupported;
>> +		break;
>> +	/* case 5: Port 5 not supported! */
>> +	case 6: /* 1st cpu port */
>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>> +		    state->interface != PHY_INTERFACE_MODE_RGMII &&
>> +		    state->interface != PHY_INTERFACE_MODE_TRGMII)
>> +			goto unsupported;
>> +		break;
>> +	default:
>> +		linkmode_zero(supported);
>> +		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
>
> You could reorder this as:
>
> 	default:
> 		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
> 	unsupported:
> 		linkmode_zero(supported);
>

Hi David,

> and save having the "unsupported" at the end of the function.  Not sure
> what DaveM would think of it though.

Can you give your option about this?
So I know what to do with it and make a new series.

Greats,

René

>
>
> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
> According to speedtest.net: 11.9Mbps down 500kbps up

Re: [PATCH net-next 1/3] net: dsa: mt7530: Convert to PHYLINK API

[David Miller]

From: René van Dorst <opensource@vdorst.com>
Date: Thu, 01 Aug 2019 17:21:04 +0000

> Quoting Russell King - ARM Linux admin <linux@armlinux.org.uk>:
> 
>> Hi,
>>
>> Just a couple of minor points.
>>
>> On Wed, Jul 24, 2019 at 09:25:47PM +0200, René van Dorst wrote:
> 
> <snip>
> 
>>> +
>>> +static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
>>> +				    unsigned long *supported,
>>> +				    struct phylink_link_state *state)
>>> +{
>>> +	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
>>> +
>>> +	switch (port) {
>>> +	case 0: /* Internal phy */
>>> +	case 1:
>>> +	case 2:
>>> +	case 3:
>>> +	case 4:
>>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>>> +		    state->interface != PHY_INTERFACE_MODE_GMII)
>>> +			goto unsupported;
>>> +		break;
>>> +	/* case 5: Port 5 not supported! */
>>> +	case 6: /* 1st cpu port */
>>> +		if (state->interface != PHY_INTERFACE_MODE_NA &&
>>> +		    state->interface != PHY_INTERFACE_MODE_RGMII &&
>>> +		    state->interface != PHY_INTERFACE_MODE_TRGMII)
>>> +			goto unsupported;
>>> +		break;
>>> +	default:
>>> +		linkmode_zero(supported);
>>> + dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
>>
>> You could reorder this as:
>>
>> 	default:
>> 		dev_err(ds->dev, "%s: unsupported port: %i\n", __func__, port);
>> 	unsupported:
>> 		linkmode_zero(supported);
>>
> 
> Hi David,
> 
>> and save having the "unsupported" at the end of the function.  Not
>> sure
>> what DaveM would think of it though.
> 
> Can you give your option about this?
> So I know what to do with it and make a new series.

Russell's suggestion is fine.

[PATCH net-next 2/3] dt-bindings: net: dsa: mt7530: Add support for port 5

[René van Dorst]

MT7530 port 5 has many modes/configurations.
Update the documentation how to use port 5.

Signed-off-by: René van Dorst <opensource@vdorst.com>

rfc->v1:
* No change
---
 .../devicetree/bindings/net/dsa/mt7530.txt    | 215 ++++++++++++++++++
 1 file changed, 215 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/dsa/mt7530.txt b/Documentation/devicetree/bindings/net/dsa/mt7530.txt
index 47aa205ee0bd..f3486780f2c2 100644
--- a/Documentation/devicetree/bindings/net/dsa/mt7530.txt
+++ b/Documentation/devicetree/bindings/net/dsa/mt7530.txt
@@ -35,6 +35,39 @@ Required properties for the child nodes within ports container:
 - phy-mode: String, must be either "trgmii" or "rgmii" for port labeled
 	 "cpu".
 
+Port 5 of the switch is muxed between:
+1. GMAC5: GMAC5 can interface with another external MAC or PHY.
+2. PHY of port 0 or port 4: PHY interfaces with an external MAC like 2nd GMAC
+   of the SOC. Used in many setups where port 0/4 becomes the WAN port.
+
+Port 5 modes/configurations:
+1. Port 5 is disabled and isolated: An external phy can interface to the 2nd
+   GMAC of the SOC.
+   In the case of a build-in MT7530 switch, port 5 shares the RGMII bus with 2nd
+   GMAC and an optional external phy. Mind the GPIO/pinctl settings of the SOC!
+2. Port 5 is muxed to PHY of port 0/4: Port 0/4 interfaces with 2nd GMAC.
+   It is a simple MAC to PHY interface, port 5 needs to be setup for xMII mode
+   and RGMII delay.
+3. Port 5 is muxed to GMAC5 and can interface to an external phy.
+   Port 5 becomes an extra switch port.
+   Only works on platform where external phy TX<->RX lines are swapped.
+   Like in the Ubiquiti ER-X-SFP.
+4. Port 5 is muxed to GMAC5 and interfaces with the 2nd GAMC as 2nd CPU port.
+   Currently a 2nd CPU port is not supported by DSA code.
+
+Depending on how the external PHY is wired:
+1. normal: The PHY can only connect to 2nd GMAC but not to the switch
+2. swapped: RGMII TX, RX are swapped; external phy interface with the switch as
+   a ethernet port. But can't interface to the 2nd GMAC.
+
+Based on the DT the port 5 mode is configured.
+
+Driver tries to lookup the phy-handle of the 2nd GMAC of the master device.
+When phy-handle matches PHY of port 0 or 4 then port 5 set-up as mode 2.
+phy-mode must be set, see also example 2 below!
+ * mt7621: phy-mode = "rgmii-txid";
+ * mt7623: phy-mode = "rgmii";
+
 See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
 required, optional properties and how the integrated switch subnodes must
 be specified.
@@ -94,3 +127,185 @@ Example:
 			};
 		};
 	};
+
+Example 2: MT7621: Port 4 is WAN port: 2nd GMAC -> Port 5 -> PHY port 4.
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "rgmii";
+
+		fixed-link {
+			speed = <1000>;
+			full-duplex;
+			pause;
+		};
+	};
+
+	gmac1: mac@1 {
+		compatible = "mediatek,eth-mac";
+		reg = <1>;
+		phy-mode = "rgmii-txid";
+		phy-handle = <&phy4>;
+	};
+
+	mdio: mdio-bus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/* Internal phy */
+		phy4: ethernet-phy@4 {
+			reg = <4>;
+		};
+
+		mt7530: switch@1f {
+			compatible = "mediatek,mt7621";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x1f>;
+			pinctrl-names = "default";
+			mediatek,mcm;
+
+			resets = <&rstctrl 2>;
+			reset-names = "mcm";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					label = "lan0";
+				};
+
+				port@1 {
+					reg = <1>;
+					label = "lan1";
+				};
+
+				port@2 {
+					reg = <2>;
+					label = "lan2";
+				};
+
+				port@3 {
+					reg = <3>;
+					label = "lan3";
+				};
+
+/* Commented out. Port 4 is handled by 2nd GMAC.
+				port@4 {
+					reg = <4>;
+					label = "lan4";
+				};
+*/
+
+				cpu_port0: port@6 {
+					reg = <6>;
+					label = "cpu";
+					ethernet = <&gmac0>;
+					phy-mode = "rgmii";
+
+					fixed-link {
+						speed = <1000>;
+						full-duplex;
+						pause;
+					};
+				};
+			};
+		};
+	};
+};
+
+Example 3: MT7621: Port 5 is connected to external PHY: Port 5 -> external PHY.
+
+&eth {
+	status = "okay";
+
+	gmac0: mac@0 {
+		compatible = "mediatek,eth-mac";
+		reg = <0>;
+		phy-mode = "rgmii";
+
+		fixed-link {
+			speed = <1000>;
+			full-duplex;
+			pause;
+		};
+	};
+
+	mdio: mdio-bus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		/* External phy */
+		ephy5: ethernet-phy@7 {
+			reg = <7>;
+		};
+
+		mt7530: switch@1f {
+			compatible = "mediatek,mt7621";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x1f>;
+			pinctrl-names = "default";
+			mediatek,mcm;
+
+			resets = <&rstctrl 2>;
+			reset-names = "mcm";
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					label = "lan0";
+				};
+
+				port@1 {
+					reg = <1>;
+					label = "lan1";
+				};
+
+				port@2 {
+					reg = <2>;
+					label = "lan2";
+				};
+
+				port@3 {
+					reg = <3>;
+					label = "lan3";
+				};
+
+				port@4 {
+					reg = <4>;
+					label = "lan4";
+				};
+
+				port@5 {
+					reg = <5>;
+					label = "lan5";
+					phy-mode = "rgmii";
+					phy-handle = <&ephy5>;
+				};
+
+				cpu_port0: port@6 {
+					reg = <6>;
+					label = "cpu";
+					ethernet = <&gmac0>;
+					phy-mode = "rgmii";
+
+					fixed-link {
+						speed = <1000>;
+						full-duplex;
+						pause;
+					};
+				};
+			};
+		};
+	};
+};
-- 
2.20.1

[PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[René van Dorst]

Adding support for port 5.

Port 5 can muxed/interface to:
- internal 5th GMAC of the switch; can be used as 2nd CPU port or as
  extra port with an external phy for a 6th ethernet port.
- internal PHY of port 0 or 4; Used in most applications so that port 0
  or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.

Signed-off-by: René van Dorst <opensource@vdorst.com>

rfc->v1:
* Removed unnecessary info print suggested by Andrew Lunn
* Added support for MII mode for port 5
---
 drivers/net/dsa/mt7530.c | 145 ++++++++++++++++++++++++++++++++++++---
 drivers/net/dsa/mt7530.h |  28 ++++++++
 2 files changed, 165 insertions(+), 8 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 73a2204bf81a..785ce825aeb1 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -633,6 +633,75 @@ mt7530_get_sset_count(struct dsa_switch *ds, int port, int sset)
 	return ARRAY_SIZE(mt7530_mib);
 }
 
+static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
+{
+	struct mt7530_priv *priv = ds->priv;
+	u8 tx_delay = 0;
+	int val;
+
+	mutex_lock(&priv->reg_mutex);
+
+	val = mt7530_read(priv, MT7530_MHWTRAP);
+
+	val |= MHWTRAP_MANUAL | MHWTRAP_P5_MAC_SEL | MHWTRAP_P5_DIS;
+	val &= ~MHWTRAP_P5_RGMII_MODE & ~MHWTRAP_PHY0_SEL;
+
+	switch (priv->p5_intf_sel) {
+	case P5_INTF_SEL_PHY_P0:
+		/* MT7530_P5_MODE_GPHY_P0: 2nd GMAC -> P5 -> P0 */
+		val |= MHWTRAP_PHY0_SEL;
+		/* fall through */
+	case P5_INTF_SEL_PHY_P4:
+		/* MT7530_P5_MODE_GPHY_P4: 2nd GMAC -> P5 -> P4 */
+		val &= ~MHWTRAP_P5_MAC_SEL & ~MHWTRAP_P5_DIS;
+
+		/* Setup the MAC by default for the cpu port */
+		mt7530_write(priv, MT7530_PMCR_P(5), 0x56300);
+		break;
+	case P5_INTF_SEL_GMAC5:
+		/* MT7530_P5_MODE_GMAC: P5 -> External phy or 2nd GMAC */
+		val &= ~MHWTRAP_P5_DIS;
+		break;
+	case P5_DISABLED:
+		interface = PHY_INTERFACE_MODE_NA;
+		break;
+	default:
+		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
+			priv->p5_intf_sel);
+		goto unlock_exit;
+	}
+
+	/* Setup RGMII settings */
+	if (phy_interface_mode_is_rgmii(interface)) {
+		val |= MHWTRAP_P5_RGMII_MODE;
+
+		/* P5 RGMII RX Clock Control: delay setting for 1000M */
+		mt7530_write(priv, MT7530_P5RGMIIRXCR, CSR_RGMII_EDGE_ALIGN);
+
+		/* Don't set delay in DSA mode */
+		if (!dsa_is_dsa_port(priv->ds, 5) &&
+		    (interface == PHY_INTERFACE_MODE_RGMII_TXID ||
+		    interface == PHY_INTERFACE_MODE_RGMII_ID))
+			tx_delay = 4; /* n * 0.5 ns */
+
+		/* P5 RGMII TX Clock Control: delay x */
+		mt7530_write(priv, MT7530_P5RGMIITXCR,
+			     CSR_RGMII_TXC_CFG(0x10 + tx_delay));
+
+		/* reduce P5 RGMII Tx driving, 8mA */
+		mt7530_write(priv, MT7530_IO_DRV_CR,
+			     P5_IO_CLK_DRV(1) | P5_IO_DATA_DRV(1));
+	}
+
+	mt7530_write(priv, MT7530_MHWTRAP, val);
+
+	dev_info(ds->dev, "Setup P5, HWTRAP=0x%x, intf_sel=%s, phy-mode=%s\n",
+		 val, p5_intf_modes(priv->p5_intf_sel), phy_modes(interface));
+
+unlock_exit:
+	mutex_unlock(&priv->reg_mutex);
+}
+
 static int
 mt7530_cpu_port_enable(struct mt7530_priv *priv,
 		       int port)
@@ -1167,6 +1236,10 @@ mt7530_setup(struct dsa_switch *ds)
 	u32 id, val;
 	struct device_node *dn;
 	struct mt7530_dummy_poll p;
+	phy_interface_t interface;
+	struct device_node *mac_np;
+	struct device_node *phy_node;
+	const __be32 *_id;
 
 	/* The parent node of master netdev which holds the common system
 	 * controller also is the container for two GMACs nodes representing
@@ -1254,6 +1327,40 @@ mt7530_setup(struct dsa_switch *ds)
 			mt7530_port_disable(ds, i);
 	}
 
+	/* Setup port 5 */
+	priv->p5_intf_sel = P5_DISABLED;
+	interface = PHY_INTERFACE_MODE_NA;
+
+	if (!dsa_is_unused_port(ds, 5)) {
+		priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
+		interface = of_get_phy_mode(ds->ports[5].dn);
+	} else {
+		/* Scan the ethernet nodes. Look for GMAC1, Lookup used phy */
+		for_each_child_of_node(dn, mac_np) {
+			if (!of_device_is_compatible(mac_np,
+						     "mediatek,eth-mac"))
+				continue;
+			_id = of_get_property(mac_np, "reg", NULL);
+			if (be32_to_cpup(_id)  != 1)
+				continue;
+
+			interface = of_get_phy_mode(mac_np);
+			phy_node = of_parse_phandle(mac_np, "phy-handle", 0);
+
+			if (phy_node->parent == priv->dev->of_node->parent) {
+				_id = of_get_property(phy_node, "reg", NULL);
+				id = be32_to_cpup(_id);
+				if (id == 0)
+					priv->p5_intf_sel = P5_INTF_SEL_PHY_P0;
+				if (id == 4)
+					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;
+			}
+			break;
+		}
+	}
+
+	mt7530_setup_port5(ds, interface);
+
 	/* Flush the FDB table */
 	ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL);
 	if (ret < 0)
@@ -1267,7 +1374,7 @@ static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
 				      const struct phylink_link_state *state)
 {
 	struct mt7530_priv *priv = ds->priv;
-	u32 mcr_cur, mcr_new;
+	u32 mcr_cur, mcr_new = 0;
 
 	switch (port) {
 	case 0: /* Internal phy */
@@ -1278,7 +1385,19 @@ static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
 		if (state->interface != PHY_INTERFACE_MODE_GMII)
 			return;
 		break;
-	/* case 5: Port 5 is not supported! */
+	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
+		if (!phy_interface_mode_is_rgmii(state->interface) &&
+		    state->interface != PHY_INTERFACE_MODE_MII &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			return;
+		if (priv->p5_intf_sel != P5_INTF_SEL_GMAC5) {
+			priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
+			mt7530_setup_port5(ds, state->interface);
+		}
+		/* We are connected to external phy */
+		if (dsa_is_user_port(ds, 5))
+			mcr_new |= PMCR_EXT_PHY;
+		break;
 	case 6: /* 1st cpu port */
 		if (state->interface != PHY_INTERFACE_MODE_RGMII &&
 		    state->interface != PHY_INTERFACE_MODE_TRGMII)
@@ -1304,7 +1423,7 @@ static void mt7530_phylink_mac_config(struct dsa_switch *ds, int port,
 	}
 
 	mcr_cur = mt7530_read(priv, MT7530_PMCR_P(port));
-	mcr_new = mcr_cur;
+	mcr_new |= mcr_cur;
 	mcr_new &= ~(PMCR_FORCE_SPEED_1000 | PMCR_FORCE_SPEED_100 |
 		     PMCR_FORCE_FDX | PMCR_TX_FC_EN | PMCR_RX_FC_EN);
 	mcr_new |= PMCR_IFG_XMIT(1) | PMCR_MAC_MODE | PMCR_BACKOFF_EN |
@@ -1365,7 +1484,13 @@ static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
 		    state->interface != PHY_INTERFACE_MODE_GMII)
 			goto unsupported;
 		break;
-	/* case 5: Port 5 not supported! */
+	case 5: /* 2nd cpu port with phy of port 0 or 4 / external phy */
+		if (state->interface != PHY_INTERFACE_MODE_NA &&
+		    !phy_interface_mode_is_rgmii(state->interface) &&
+		    state->interface != PHY_INTERFACE_MODE_MII &&
+		    state->interface != PHY_INTERFACE_MODE_GMII)
+			goto unsupported;
+		break;
 	case 6: /* 1st cpu port */
 		if (state->interface != PHY_INTERFACE_MODE_NA &&
 		    state->interface != PHY_INTERFACE_MODE_RGMII &&
@@ -1381,15 +1506,19 @@ static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
 	phylink_set_port_modes(mask);
 	phylink_set(mask, Autoneg);
 
-	if (state->interface != PHY_INTERFACE_MODE_TRGMII) {
+	if (state->interface == PHY_INTERFACE_MODE_TRGMII) {
+		phylink_set(mask, 1000baseT_Full);
+	} else {
 		phylink_set(mask, 10baseT_Half);
 		phylink_set(mask, 10baseT_Full);
 		phylink_set(mask, 100baseT_Half);
 		phylink_set(mask, 100baseT_Full);
-		phylink_set(mask, 1000baseT_Half);
-	}
 
-	phylink_set(mask, 1000baseT_Full);
+		if (state->interface != PHY_INTERFACE_MODE_MII) {
+			phylink_set(mask, 1000baseT_Half);
+			phylink_set(mask, 1000baseT_Full);
+		}
+	}
 
 	phylink_set(mask, Pause);
 	phylink_set(mask, Asym_Pause);
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 107dd04acede..0f7276a2270a 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -186,6 +186,7 @@ enum mt7530_vlan_port_attr {
 /* Register for port MAC control register */
 #define MT7530_PMCR_P(x)		(0x3000 + ((x) * 0x100))
 #define  PMCR_IFG_XMIT(x)		(((x) & 0x3) << 18)
+#define  PMCR_EXT_PHY			BIT(17)
 #define  PMCR_MAC_MODE			BIT(16)
 #define  PMCR_FORCE_MODE		BIT(15)
 #define  PMCR_TX_EN			BIT(14)
@@ -245,6 +246,7 @@ enum mt7530_vlan_port_attr {
 
 /* Register for hw trap modification */
 #define MT7530_MHWTRAP			0x7804
+#define  MHWTRAP_PHY0_SEL		BIT(20)
 #define  MHWTRAP_MANUAL			BIT(16)
 #define  MHWTRAP_P5_MAC_SEL		BIT(13)
 #define  MHWTRAP_P6_DIS			BIT(8)
@@ -402,6 +404,30 @@ struct mt7530_port {
 	u16 pvid;
 };
 
+/* Port 5 interface select definitions */
+enum p5_interface_select {
+	P5_DISABLED = 0,
+	P5_INTF_SEL_PHY_P0,
+	P5_INTF_SEL_PHY_P4,
+	P5_INTF_SEL_GMAC5,
+};
+
+static const char *p5_intf_modes(unsigned int p5_interface)
+{
+	switch (p5_interface) {
+	case P5_DISABLED:
+		return "DISABLED";
+	case P5_INTF_SEL_PHY_P0:
+		return "PHY P0";
+	case P5_INTF_SEL_PHY_P4:
+		return "PHY P4";
+	case P5_INTF_SEL_GMAC5:
+		return "GMAC5";
+	default:
+		return "unknown";
+	}
+}
+
 /* struct mt7530_priv -	This is the main data structure for holding the state
  *			of the driver
  * @dev:		The device pointer
@@ -418,6 +444,7 @@ struct mt7530_port {
  * @reg_mutex:		The lock for protecting among process accessing
  *			registers
  * @p6_interface	Holding the current port 6 interface
+ * @p5_intf_sel:	Holding the current port 5 interface select
  */
 struct mt7530_priv {
 	struct device		*dev;
@@ -431,6 +458,7 @@ struct mt7530_priv {
 	unsigned int		id;
 	bool			mcm;
 	phy_interface_t		p6_interface;
+	unsigned int		p5_intf_sel;
 
 	struct mt7530_port	ports[MT7530_NUM_PORTS];
 	/* protect among processes for registers access*/
-- 
2.20.1

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[David Miller]

From: René van Dorst <opensource@vdorst.com>
Date: Wed, 24 Jul 2019 21:25:49 +0200

> @@ -1167,6 +1236,10 @@ mt7530_setup(struct dsa_switch *ds)
>  	u32 id, val;
>  	struct device_node *dn;
>  	struct mt7530_dummy_poll p;
> +	phy_interface_t interface;
> +	struct device_node *mac_np;
> +	struct device_node *phy_node;
> +	const __be32 *_id;

Reverse christmas tree here please.

Thank you.

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[René van Dorst]

Quoting David Miller <davem@davemloft.net>:

> From: René van Dorst <opensource@vdorst.com>
> Date: Wed, 24 Jul 2019 21:25:49 +0200
>
>> @@ -1167,6 +1236,10 @@ mt7530_setup(struct dsa_switch *ds)
>>  	u32 id, val;
>>  	struct device_node *dn;
>>  	struct mt7530_dummy_poll p;
>> +	phy_interface_t interface;
>> +	struct device_node *mac_np;
>> +	struct device_node *phy_node;
>> +	const __be32 *_id;
>

Hi David,

> Reverse christmas tree here please.
>
> Thank you.

OK, I shall change that.
I spin a new version.

Greats,

René

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[Florian Fainelli]

On 7/24/2019 9:25 PM, René van Dorst wrote:
> Adding support for port 5.
> 
> Port 5 can muxed/interface to:
> - internal 5th GMAC of the switch; can be used as 2nd CPU port or as
>   extra port with an external phy for a 6th ethernet port.
> - internal PHY of port 0 or 4; Used in most applications so that port 0
>   or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.
> 
> Signed-off-by: René van Dorst <opensource@vdorst.com>

[snip]

> +	/* Setup port 5 */
> +	priv->p5_intf_sel = P5_DISABLED;
> +	interface = PHY_INTERFACE_MODE_NA;
> +
> +	if (!dsa_is_unused_port(ds, 5)) {
> +		priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
> +		interface = of_get_phy_mode(ds->ports[5].dn);
> +	} else {
> +		/* Scan the ethernet nodes. Look for GMAC1, Lookup used phy */
> +		for_each_child_of_node(dn, mac_np) {
> +			if (!of_device_is_compatible(mac_np,
> +						     "mediatek,eth-mac"))
> +				continue;
> +			_id = of_get_property(mac_np, "reg", NULL);
> +			if (be32_to_cpup(_id)  != 1)
> +				continue;
> +
> +			interface = of_get_phy_mode(mac_np);
> +			phy_node = of_parse_phandle(mac_np, "phy-handle", 0);
> +
> +			if (phy_node->parent == priv->dev->of_node->parent) {
> +				_id = of_get_property(phy_node, "reg", NULL);
> +				id = be32_to_cpup(_id);
> +				if (id == 0)
> +					priv->p5_intf_sel = P5_INTF_SEL_PHY_P0;
> +				if (id == 4)
> +					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;

Can you use of_mdio_parse_addr() here?
-- 
Florian

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[René van Dorst]

Quoting Florian Fainelli <f.fainelli@gmail.com>:

> On 7/24/2019 9:25 PM, René van Dorst wrote:
>> Adding support for port 5.
>>
>> Port 5 can muxed/interface to:
>> - internal 5th GMAC of the switch; can be used as 2nd CPU port or as
>>   extra port with an external phy for a 6th ethernet port.
>> - internal PHY of port 0 or 4; Used in most applications so that port 0
>>   or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.
>>
>> Signed-off-by: René van Dorst <opensource@vdorst.com>
>
> [snip]
>
>> +	/* Setup port 5 */
>> +	priv->p5_intf_sel = P5_DISABLED;
>> +	interface = PHY_INTERFACE_MODE_NA;
>> +
>> +	if (!dsa_is_unused_port(ds, 5)) {
>> +		priv->p5_intf_sel = P5_INTF_SEL_GMAC5;
>> +		interface = of_get_phy_mode(ds->ports[5].dn);
>> +	} else {
>> +		/* Scan the ethernet nodes. Look for GMAC1, Lookup used phy */
>> +		for_each_child_of_node(dn, mac_np) {
>> +			if (!of_device_is_compatible(mac_np,
>> +						     "mediatek,eth-mac"))
>> +				continue;
>> +			_id = of_get_property(mac_np, "reg", NULL);
>> +			if (be32_to_cpup(_id)  != 1)
>> +				continue;
>> +
>> +			interface = of_get_phy_mode(mac_np);
>> +			phy_node = of_parse_phandle(mac_np, "phy-handle", 0);
>> +
>> +			if (phy_node->parent == priv->dev->of_node->parent) {
>> +				_id = of_get_property(phy_node, "reg", NULL);
>> +				id = be32_to_cpup(_id);
>> +				if (id == 0)
>> +					priv->p5_intf_sel = P5_INTF_SEL_PHY_P0;
>> +				if (id == 4)
>> +					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;
>

Hi Florian,

> Can you use of_mdio_parse_addr() here?

Yes that function be used.

Thanks for mention this function.

I see that I can refactor this scan routine a bit more.
Also I missing a of_node_put(phy_node) at the end.

> --
> Florian

Greats,

René

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[Russell King - ARM Linux admin]

On Wed, Jul 24, 2019 at 09:25:49PM +0200, René van Dorst wrote:
> Adding support for port 5.
> 
> Port 5 can muxed/interface to:
> - internal 5th GMAC of the switch; can be used as 2nd CPU port or as
>   extra port with an external phy for a 6th ethernet port.
> - internal PHY of port 0 or 4; Used in most applications so that port 0
>   or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.

...

> @@ -1381,15 +1506,19 @@ static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
>  	phylink_set_port_modes(mask);
>  	phylink_set(mask, Autoneg);
>  
> -	if (state->interface != PHY_INTERFACE_MODE_TRGMII) {
> +	if (state->interface == PHY_INTERFACE_MODE_TRGMII) {
> +		phylink_set(mask, 1000baseT_Full);
> +	} else {
>  		phylink_set(mask, 10baseT_Half);
>  		phylink_set(mask, 10baseT_Full);
>  		phylink_set(mask, 100baseT_Half);
>  		phylink_set(mask, 100baseT_Full);
> -		phylink_set(mask, 1000baseT_Half);
> -	}
>  
> -	phylink_set(mask, 1000baseT_Full);
> +		if (state->interface != PHY_INTERFACE_MODE_MII) {
> +			phylink_set(mask, 1000baseT_Half);
> +			phylink_set(mask, 1000baseT_Full);
> +		}
> +	}

As port 5 could use an external PHY, and it supports gigabit speeds,
consider that the PHY may provide not only copper but also fiber
connectivity, so port 5 should probably also have 1000baseX modes
too, which would allow such a PHY to bridge the switch to fiber.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

Re: [PATCH net-next 3/3] net: dsa: mt7530: Add support for port 5

[René van Dorst]

Quoting Russell King - ARM Linux admin <linux@armlinux.org.uk>:

> On Wed, Jul 24, 2019 at 09:25:49PM +0200, René van Dorst wrote:
>> Adding support for port 5.
>>
>> Port 5 can muxed/interface to:
>> - internal 5th GMAC of the switch; can be used as 2nd CPU port or as
>>   extra port with an external phy for a 6th ethernet port.
>> - internal PHY of port 0 or 4; Used in most applications so that port 0
>>   or 4 is the WAN port and interfaces with the 2nd GMAC of the SOC.
>
> ...
>
>> @@ -1381,15 +1506,19 @@ static void mt7530_phylink_validate(struct  
>> dsa_switch *ds, int port,
>>  	phylink_set_port_modes(mask);
>>  	phylink_set(mask, Autoneg);
>>
>> -	if (state->interface != PHY_INTERFACE_MODE_TRGMII) {
>> +	if (state->interface == PHY_INTERFACE_MODE_TRGMII) {
>> +		phylink_set(mask, 1000baseT_Full);
>> +	} else {
>>  		phylink_set(mask, 10baseT_Half);
>>  		phylink_set(mask, 10baseT_Full);
>>  		phylink_set(mask, 100baseT_Half);
>>  		phylink_set(mask, 100baseT_Full);
>> -		phylink_set(mask, 1000baseT_Half);
>> -	}
>>
>> -	phylink_set(mask, 1000baseT_Full);
>> +		if (state->interface != PHY_INTERFACE_MODE_MII) {
>> +			phylink_set(mask, 1000baseT_Half);
>> +			phylink_set(mask, 1000baseT_Full);
>> +		}
>> +	}
>

Hi Russell,

Thanks for your review and many useful comments and explanations.

> As port 5 could use an external PHY, and it supports gigabit speeds,
> consider that the PHY may provide not only copper but also fiber
> connectivity, so port 5 should probably also have 1000baseX modes
> too, which would allow such a PHY to bridge the switch to fiber.

I shall add the 1000baseX modes.

My device, Ubiquiti EdgeRouter X SFP, has this setup.
Port 5 is connected to a at8033 phy which acts as a RGMII-SerDes converter for
the SFP cage. According to the datasheet it only support 100BASE-FX and
1000BASE-X. With bootstrap resistors the PHY is put in RGMII-SerDes 1000BASE-X
mode.

The problem I had is that the current mainline driver doesn't support  
this mode
so I had to hack it in myself [0][1]. I probably doing the wrong thing with my
phy driver. Driver works for me, it detects a link and sets-up a 1gbit link.
So I can test port 5. But the driver may report all the wrong values to
PHYLIB/PHYLINK. But now that I learned more about it I can revise the driver.


By reading your previous emails, my setup could official not support the
FiberStore SFP-GB-GE-T module, because it requests a SGMII interface.
But my PHY only supports 1000BaseX and my code currently doesn't error out.

dmesg output of this module:
[    3.382637] sfp sfp_lan5: module FiberStore       SFP-GB-GE-T       
rev B    sn <snip>      dc 19-12-17
[    3.402048] sfp sfp_lan5:   unknown/unspecified connector, encoding  
8b10b, nominal bitrate 1.3Gbps +0% -0%
[    3.421268] sfp sfp_lan5:   1000BaseSX- 1000BaseLX- 1000BaseCX-  
1000BaseT+ 100BaseLX- 100BaseFX- BaseBX10- BasePX-
[    3.441867] sfp sfp_lan5:   10GBaseSR- 10GBaseLR- 10GBaseLRM- 10GBaseER-
[    3.455208] sfp sfp_lan5:   Copper length: 100m
[    3.464225] sfp sfp_lan5:   Options: txdisable
[    3.473066] sfp sfp_lan5:   Diagnostics:
[    3.481034] sfp sfp_lan5: Unknown/unsupported extended compliance  
code: 0x01
[    3.495069] Atheros 8031 ethernet mdio-bus:07: SFP interface sgmii

What is the best way to do it in case of SGMII interface request?
Return that we don't support SGMII or report that we only support 1  
mode and no
auto-negotiation?

Greats,

René

>

> --
> RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
> FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
> According to speedtest.net: 11.9Mbps down 500kbps up


[0]:  
https://github.com/vDorst/linux-1/commit/dad5d6ec65cfa99c204e9756b3fc234071709292
[1]:  
https://github.com/vDorst/linux-1/commit/a3aa74e84796604ab8619cfaf1c299c115a8736f