1 files changed, 336 insertions, 0 deletions
diff --git a/drivers/net/dsa/mv88e6060.c b/drivers/net/dsa/mv88e6060.c
new file mode 100644
index 000000000..fdda62d6e
--- /dev/null
+++ b/drivers/net/dsa/mv88e6060.c
@@ -0,0 +1,336 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
+ * Copyright (c) 2008-2009 Marvell Semiconductor
+ */
+
+#include <linux/delay.h>
+#include <linux/etherdevice.h>
+#include <linux/jiffies.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <net/dsa.h>
+#include "mv88e6060.h"
+
+static int reg_read(struct mv88e6060_priv *priv, int addr, int reg)
+{
+	return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
+}
+
+static int reg_write(struct mv88e6060_priv *priv, int addr, int reg, u16 val)
+{
+	return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
+}
+
+static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
+{
+	int ret;
+
+	ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID);
+	if (ret >= 0) {
+		if (ret == PORT_SWITCH_ID_6060)
+			return "Marvell 88E6060 (A0)";
+		if (ret == PORT_SWITCH_ID_6060_R1 ||
+		    ret == PORT_SWITCH_ID_6060_R2)
+			return "Marvell 88E6060 (B0)";
+		if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060)
+			return "Marvell 88E6060";
+	}
+
+	return NULL;
+}
+
+static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds,
+							int port,
+							enum dsa_tag_protocol m)
+{
+	return DSA_TAG_PROTO_TRAILER;
+}
+
+static int mv88e6060_switch_reset(struct mv88e6060_priv *priv)
+{
+	int i;
+	int ret;
+	unsigned long timeout;
+
+	/* Set all ports to the disabled state. */
+	for (i = 0; i < MV88E6060_PORTS; i++) {
+		ret = reg_read(priv, REG_PORT(i), PORT_CONTROL);
+		if (ret < 0)
+			return ret;
+		ret = reg_write(priv, REG_PORT(i), PORT_CONTROL,
+				ret & ~PORT_CONTROL_STATE_MASK);
+		if (ret)
+			return ret;
+	}
+
+	/* Wait for transmit queues to drain. */
+	usleep_range(2000, 4000);
+
+	/* Reset the switch. */
+	ret = reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL,
+			GLOBAL_ATU_CONTROL_SWRESET |
+			GLOBAL_ATU_CONTROL_LEARNDIS);
+	if (ret)
+		return ret;
+
+	/* Wait up to one second for reset to complete. */
+	timeout = jiffies + 1 * HZ;
+	while (time_before(jiffies, timeout)) {
+		ret = reg_read(priv, REG_GLOBAL, GLOBAL_STATUS);
+		if (ret < 0)
+			return ret;
+
+		if (ret & GLOBAL_STATUS_INIT_READY)
+			break;
+
+		usleep_range(1000, 2000);
+	}
+	if (time_after(jiffies, timeout))
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+static int mv88e6060_setup_global(struct mv88e6060_priv *priv)
+{
+	int ret;
+
+	/* Disable discarding of frames with excessive collisions,
+	 * set the maximum frame size to 1536 bytes, and mask all
+	 * interrupt sources.
+	 */
+	ret = reg_write(priv, REG_GLOBAL, GLOBAL_CONTROL,
+			GLOBAL_CONTROL_MAX_FRAME_1536);
+	if (ret)
+		return ret;
+
+	/* Disable automatic address learning.
+	 */
+	return reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL,
+			 GLOBAL_ATU_CONTROL_LEARNDIS);
+}
+
+static int mv88e6060_setup_port(struct mv88e6060_priv *priv, int p)
+{
+	int addr = REG_PORT(p);
+	int ret;
+
+	if (dsa_is_unused_port(priv->ds, p))
+		return 0;
+
+	/* Do not force flow control, disable Ingress and Egress
+	 * Header tagging, disable VLAN tunneling, and set the port
+	 * state to Forwarding.  Additionally, if this is the CPU
+	 * port, enable Ingress and Egress Trailer tagging mode.
+	 */
+	ret = reg_write(priv, addr, PORT_CONTROL,
+			dsa_is_cpu_port(priv->ds, p) ?
+			PORT_CONTROL_TRAILER |
+			PORT_CONTROL_INGRESS_MODE |
+			PORT_CONTROL_STATE_FORWARDING :
+			PORT_CONTROL_STATE_FORWARDING);
+	if (ret)
+		return ret;
+
+	/* Port based VLAN map: give each port its own address
+	 * database, allow the CPU port to talk to each of the 'real'
+	 * ports, and allow each of the 'real' ports to only talk to
+	 * the CPU port.
+	 */
+	ret = reg_write(priv, addr, PORT_VLAN_MAP,
+			((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
+			(dsa_is_cpu_port(priv->ds, p) ?
+			 dsa_user_ports(priv->ds) :
+			 BIT(dsa_to_port(priv->ds, p)->cpu_dp->index)));
+	if (ret)
+		return ret;
+
+	/* Port Association Vector: when learning source addresses
+	 * of packets, add the address to the address database using
+	 * a port bitmap that has only the bit for this port set and
+	 * the other bits clear.
+	 */
+	return reg_write(priv, addr, PORT_ASSOC_VECTOR, BIT(p));
+}
+
+static int mv88e6060_setup_addr(struct mv88e6060_priv *priv)
+{
+	u8 addr[ETH_ALEN];
+	int ret;
+	u16 val;
+
+	eth_random_addr(addr);
+
+	val = addr[0] << 8 | addr[1];
+
+	/* The multicast bit is always transmitted as a zero, so the switch uses
+	 * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA.
+	 */
+	val &= 0xfeff;
+
+	ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_01, val);
+	if (ret)
+		return ret;
+
+	ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_23,
+			(addr[2] << 8) | addr[3]);
+	if (ret)
+		return ret;
+
+	return reg_write(priv, REG_GLOBAL, GLOBAL_MAC_45,
+			 (addr[4] << 8) | addr[5]);
+}
+
+static int mv88e6060_setup(struct dsa_switch *ds)
+{
+	struct mv88e6060_priv *priv = ds->priv;
+	int ret;
+	int i;
+
+	priv->ds = ds;
+
+	ret = mv88e6060_switch_reset(priv);
+	if (ret < 0)
+		return ret;
+
+	/* @@@ initialise atu */
+
+	ret = mv88e6060_setup_global(priv);
+	if (ret < 0)
+		return ret;
+
+	ret = mv88e6060_setup_addr(priv);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0; i < MV88E6060_PORTS; i++) {
+		ret = mv88e6060_setup_port(priv, i);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int mv88e6060_port_to_phy_addr(int port)
+{
+	if (port >= 0 && port < MV88E6060_PORTS)
+		return port;
+	return -1;
+}
+
+static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
+{
+	struct mv88e6060_priv *priv = ds->priv;
+	int addr;
+
+	addr = mv88e6060_port_to_phy_addr(port);
+	if (addr == -1)
+		return 0xffff;
+
+	return reg_read(priv, addr, regnum);
+}
+
+static int
+mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
+{
+	struct mv88e6060_priv *priv = ds->priv;
+	int addr;
+
+	addr = mv88e6060_port_to_phy_addr(port);
+	if (addr == -1)
+		return 0xffff;
+
+	return reg_write(priv, addr, regnum, val);
+}
+
+static const struct dsa_switch_ops mv88e6060_switch_ops = {
+	.get_tag_protocol = mv88e6060_get_tag_protocol,
+	.setup		= mv88e6060_setup,
+	.phy_read	= mv88e6060_phy_read,
+	.phy_write	= mv88e6060_phy_write,
+};
+
+static int mv88e6060_probe(struct mdio_device *mdiodev)
+{
+	struct device *dev = &mdiodev->dev;
+	struct mv88e6060_priv *priv;
+	struct dsa_switch *ds;
+	const char *name;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->bus = mdiodev->bus;
+	priv->sw_addr = mdiodev->addr;
+
+	name = mv88e6060_get_name(priv->bus, priv->sw_addr);
+	if (!name)
+		return -ENODEV;
+
+	dev_info(dev, "switch %s detected\n", name);
+
+	ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL);
+	if (!ds)
+		return -ENOMEM;
+
+	ds->dev = dev;
+	ds->num_ports = MV88E6060_PORTS;
+	ds->priv = priv;
+	ds->dev = dev;
+	ds->ops = &mv88e6060_switch_ops;
+
+	dev_set_drvdata(dev, ds);
+
+	return dsa_register_switch(ds);
+}
+
+static void mv88e6060_remove(struct mdio_device *mdiodev)
+{
+	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
+
+	if (!ds)
+		return;
+
+	dsa_unregister_switch(ds);
+}
+
+static void mv88e6060_shutdown(struct mdio_device *mdiodev)
+{
+	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
+
+	if (!ds)
+		return;
+
+	dsa_switch_shutdown(ds);
+
+	dev_set_drvdata(&mdiodev->dev, NULL);
+}
+
+static const struct of_device_id mv88e6060_of_match[] = {
+	{
+		.compatible = "marvell,mv88e6060",
+	},
+	{ /* sentinel */ },
+};
+
+static struct mdio_driver mv88e6060_driver = {
+	.probe	= mv88e6060_probe,
+	.remove = mv88e6060_remove,
+	.shutdown = mv88e6060_shutdown,
+	.mdiodrv.driver = {
+		.name = "mv88e6060",
+		.of_match_table = mv88e6060_of_match,
+	},
+};
+
+mdio_module_driver(mv88e6060_driver);
+
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
+MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mv88e6060");