dpaa2-mac: add PCS support through the Lynx module

Include PCS support in the dpaa2-eth driver by integrating it with the
new Lynx PCS module. There is not much to talk about in terms of changes
needed in the dpaa2-eth driver since the only steps necessary are to
find the MDIO device representing the PCS, register it to the Lynx PCS
module and then let phylink know if its existence also.
After this, the PCS callbacks will be treated directly by Lynx, without
interraction from dpaa2-eth's part.

Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 88 insertions, 1 deletions

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
index 3ee236c5fc37..6ff64dd1cf27 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-mac.c
@@ -15,6 +15,18 @@ static int phy_mode(enum dpmac_eth_if eth_if, phy_interface_t *if_mode)
 	case DPMAC_ETH_IF_RGMII:
 		*if_mode = PHY_INTERFACE_MODE_RGMII;
 		break;
+	case DPMAC_ETH_IF_USXGMII:
+		*if_mode = PHY_INTERFACE_MODE_USXGMII;
+		break;
+	case DPMAC_ETH_IF_QSGMII:
+		*if_mode = PHY_INTERFACE_MODE_QSGMII;
+		break;
+	case DPMAC_ETH_IF_SGMII:
+		*if_mode = PHY_INTERFACE_MODE_SGMII;
+		break;
+	case DPMAC_ETH_IF_XFI:
+		*if_mode = PHY_INTERFACE_MODE_10GBASER;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -67,6 +79,10 @@ static bool dpaa2_mac_phy_mode_mismatch(struct dpaa2_mac *mac,
 					phy_interface_t interface)
 {
 	switch (interface) {
+	case PHY_INTERFACE_MODE_10GBASER:
+	case PHY_INTERFACE_MODE_USXGMII:
+	case PHY_INTERFACE_MODE_QSGMII:
+	case PHY_INTERFACE_MODE_SGMII:
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII_RXID:
@@ -95,6 +111,17 @@ static void dpaa2_mac_validate(struct phylink_config *config,
 	phylink_set(mask, Asym_Pause);
 
 	switch (state->interface) {
+	case PHY_INTERFACE_MODE_NA:
+	case PHY_INTERFACE_MODE_10GBASER:
+	case PHY_INTERFACE_MODE_USXGMII:
+		phylink_set(mask, 10000baseT_Full);
+		if (state->interface == PHY_INTERFACE_MODE_10GBASER)
+			break;
+		phylink_set(mask, 5000baseT_Full);
+		phylink_set(mask, 2500baseT_Full);
+		fallthrough;
+	case PHY_INTERFACE_MODE_SGMII:
+	case PHY_INTERFACE_MODE_QSGMII:
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII_RXID:
@@ -227,6 +254,52 @@ out:
 	return fixed;
 }
 
+static int dpaa2_pcs_create(struct dpaa2_mac *mac,
+			    struct device_node *dpmac_node, int id)
+{
+	struct mdio_device *mdiodev;
+	struct device_node *node;
+
+	node = of_parse_phandle(dpmac_node, "pcs-handle", 0);
+	if (!node) {
+		/* do not error out on old DTS files */
+		netdev_warn(mac->net_dev, "pcs-handle node not found\n");
+		return 0;
+	}
+
+	if (!of_device_is_available(node) ||
+	    !of_device_is_available(node->parent)) {
+		netdev_err(mac->net_dev, "pcs-handle node not available\n");
+		return -ENODEV;
+	}
+
+	mdiodev = of_mdio_find_device(node);
+	of_node_put(node);
+	if (!mdiodev)
+		return -EPROBE_DEFER;
+
+	mac->pcs = lynx_pcs_create(mdiodev);
+	if (!mac->pcs) {
+		netdev_err(mac->net_dev, "lynx_pcs_create() failed\n");
+		put_device(&mdiodev->dev);
+		return -ENOMEM;
+	}
+
+	return 0;
+}
+
+static void dpaa2_pcs_destroy(struct dpaa2_mac *mac)
+{
+	struct lynx_pcs *pcs = mac->pcs;
+	struct device *dev = &pcs->mdio->dev;
+
+	if (pcs) {
+		lynx_pcs_destroy(pcs);
+		put_device(dev);
+		mac->pcs = NULL;
+	}
+}
+
 int dpaa2_mac_connect(struct dpaa2_mac *mac)
 {
 	struct fsl_mc_device *dpmac_dev = mac->mc_dev;
@@ -278,6 +351,13 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
 		goto err_put_node;
 	}
 
+	if (attr.link_type == DPMAC_LINK_TYPE_PHY &&
+	    attr.eth_if != DPMAC_ETH_IF_RGMII) {
+		err = dpaa2_pcs_create(mac, dpmac_node, attr.id);
+		if (err)
+			goto err_put_node;
+	}
+
 	mac->phylink_config.dev = &net_dev->dev;
 	mac->phylink_config.type = PHYLINK_NETDEV;
 
@@ -286,10 +366,13 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
 				 &dpaa2_mac_phylink_ops);
 	if (IS_ERR(phylink)) {
 		err = PTR_ERR(phylink);
-		goto err_put_node;
+		goto err_pcs_destroy;
 	}
 	mac->phylink = phylink;
 
+	if (mac->pcs)
+		phylink_set_pcs(mac->phylink, &mac->pcs->pcs);
+
 	err = phylink_of_phy_connect(mac->phylink, dpmac_node, 0);
 	if (err) {
 		netdev_err(net_dev, "phylink_of_phy_connect() = %d\n", err);
@@ -302,6 +385,8 @@ int dpaa2_mac_connect(struct dpaa2_mac *mac)
 
 err_phylink_destroy:
 	phylink_destroy(mac->phylink);
+err_pcs_destroy:
+	dpaa2_pcs_destroy(mac);
 err_put_node:
 	of_node_put(dpmac_node);
 err_close_dpmac:
@@ -316,6 +401,8 @@ void dpaa2_mac_disconnect(struct dpaa2_mac *mac)
 
 	phylink_disconnect_phy(mac->phylink);
 	phylink_destroy(mac->phylink);
+	dpaa2_pcs_destroy(mac);
+
 	dpmac_close(mac->mc_io, 0, mac->mc_dev->mc_handle);
 }