1 // SPDX-License-Identifier: GPL-2.0+
3 * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
4 * Copyright (c) 2008-2009 Marvell Semiconductor
7 #include <linux/delay.h>
8 #include <linux/etherdevice.h>
9 #include <linux/jiffies.h>
10 #include <linux/list.h>
11 #include <linux/module.h>
12 #include <linux/netdevice.h>
13 #include <linux/phy.h>
15 #include "mv88e6060.h"
17 static int reg_read(struct mv88e6060_priv *priv, int addr, int reg)
19 return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
22 static int reg_write(struct mv88e6060_priv *priv, int addr, int reg, u16 val)
24 return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
27 static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
31 ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID);
33 if (ret == PORT_SWITCH_ID_6060)
34 return "Marvell 88E6060 (A0)";
35 if (ret == PORT_SWITCH_ID_6060_R1 ||
36 ret == PORT_SWITCH_ID_6060_R2)
37 return "Marvell 88E6060 (B0)";
38 if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060)
39 return "Marvell 88E6060";
45 static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds,
48 return DSA_TAG_PROTO_TRAILER;
51 static int mv88e6060_switch_reset(struct mv88e6060_priv *priv)
55 unsigned long timeout;
57 /* Set all ports to the disabled state. */
58 for (i = 0; i < MV88E6060_PORTS; i++) {
59 ret = reg_read(priv, REG_PORT(i), PORT_CONTROL);
62 ret = reg_write(priv, REG_PORT(i), PORT_CONTROL,
63 ret & ~PORT_CONTROL_STATE_MASK);
68 /* Wait for transmit queues to drain. */
69 usleep_range(2000, 4000);
71 /* Reset the switch. */
72 ret = reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL,
73 GLOBAL_ATU_CONTROL_SWRESET |
74 GLOBAL_ATU_CONTROL_LEARNDIS);
78 /* Wait up to one second for reset to complete. */
79 timeout = jiffies + 1 * HZ;
80 while (time_before(jiffies, timeout)) {
81 ret = reg_read(priv, REG_GLOBAL, GLOBAL_STATUS);
85 if (ret & GLOBAL_STATUS_INIT_READY)
88 usleep_range(1000, 2000);
90 if (time_after(jiffies, timeout))
96 static int mv88e6060_setup_global(struct mv88e6060_priv *priv)
100 /* Disable discarding of frames with excessive collisions,
101 * set the maximum frame size to 1536 bytes, and mask all
104 ret = reg_write(priv, REG_GLOBAL, GLOBAL_CONTROL,
105 GLOBAL_CONTROL_MAX_FRAME_1536);
109 /* Disable automatic address learning.
111 return reg_write(priv, REG_GLOBAL, GLOBAL_ATU_CONTROL,
112 GLOBAL_ATU_CONTROL_LEARNDIS);
115 static int mv88e6060_setup_port(struct mv88e6060_priv *priv, int p)
117 int addr = REG_PORT(p);
120 /* Do not force flow control, disable Ingress and Egress
121 * Header tagging, disable VLAN tunneling, and set the port
122 * state to Forwarding. Additionally, if this is the CPU
123 * port, enable Ingress and Egress Trailer tagging mode.
125 ret = reg_write(priv, addr, PORT_CONTROL,
126 dsa_is_cpu_port(priv->ds, p) ?
127 PORT_CONTROL_TRAILER |
128 PORT_CONTROL_INGRESS_MODE |
129 PORT_CONTROL_STATE_FORWARDING :
130 PORT_CONTROL_STATE_FORWARDING);
134 /* Port based VLAN map: give each port its own address
135 * database, allow the CPU port to talk to each of the 'real'
136 * ports, and allow each of the 'real' ports to only talk to
139 ret = reg_write(priv, addr, PORT_VLAN_MAP,
140 ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
141 (dsa_is_cpu_port(priv->ds, p) ?
142 dsa_user_ports(priv->ds) :
143 BIT(dsa_to_port(priv->ds, p)->cpu_dp->index)));
147 /* Port Association Vector: when learning source addresses
148 * of packets, add the address to the address database using
149 * a port bitmap that has only the bit for this port set and
150 * the other bits clear.
152 return reg_write(priv, addr, PORT_ASSOC_VECTOR, BIT(p));
155 static int mv88e6060_setup_addr(struct mv88e6060_priv *priv)
161 eth_random_addr(addr);
163 val = addr[0] << 8 | addr[1];
165 /* The multicast bit is always transmitted as a zero, so the switch uses
166 * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA.
170 ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_01, val);
174 ret = reg_write(priv, REG_GLOBAL, GLOBAL_MAC_23,
175 (addr[2] << 8) | addr[3]);
179 return reg_write(priv, REG_GLOBAL, GLOBAL_MAC_45,
180 (addr[4] << 8) | addr[5]);
183 static int mv88e6060_setup(struct dsa_switch *ds)
185 struct mv88e6060_priv *priv = ds->priv;
191 ret = mv88e6060_switch_reset(priv);
195 /* @@@ initialise atu */
197 ret = mv88e6060_setup_global(priv);
201 ret = mv88e6060_setup_addr(priv);
205 for (i = 0; i < MV88E6060_PORTS; i++) {
206 ret = mv88e6060_setup_port(priv, i);
214 static int mv88e6060_port_to_phy_addr(int port)
216 if (port >= 0 && port < MV88E6060_PORTS)
221 static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
223 struct mv88e6060_priv *priv = ds->priv;
226 addr = mv88e6060_port_to_phy_addr(port);
230 return reg_read(priv, addr, regnum);
234 mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
236 struct mv88e6060_priv *priv = ds->priv;
239 addr = mv88e6060_port_to_phy_addr(port);
243 return reg_write(priv, addr, regnum, val);
246 static const struct dsa_switch_ops mv88e6060_switch_ops = {
247 .get_tag_protocol = mv88e6060_get_tag_protocol,
248 .setup = mv88e6060_setup,
249 .phy_read = mv88e6060_phy_read,
250 .phy_write = mv88e6060_phy_write,
253 static int mv88e6060_probe(struct mdio_device *mdiodev)
255 struct device *dev = &mdiodev->dev;
256 struct mv88e6060_priv *priv;
257 struct dsa_switch *ds;
260 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
264 priv->bus = mdiodev->bus;
265 priv->sw_addr = mdiodev->addr;
267 name = mv88e6060_get_name(priv->bus, priv->sw_addr);
271 dev_info(dev, "switch %s detected\n", name);
273 ds = devm_kzalloc(dev, sizeof(*ds), GFP_KERNEL);
278 ds->num_ports = MV88E6060_PORTS;
281 ds->ops = &mv88e6060_switch_ops;
283 dev_set_drvdata(dev, ds);
285 return dsa_register_switch(ds);
288 static void mv88e6060_remove(struct mdio_device *mdiodev)
290 struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
292 dsa_unregister_switch(ds);
295 static const struct of_device_id mv88e6060_of_match[] = {
297 .compatible = "marvell,mv88e6060",
302 static struct mdio_driver mv88e6060_driver = {
303 .probe = mv88e6060_probe,
304 .remove = mv88e6060_remove,
307 .of_match_table = mv88e6060_of_match,
311 mdio_module_driver(mv88e6060_driver);
313 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
314 MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
315 MODULE_LICENSE("GPL");
316 MODULE_ALIAS("platform:mv88e6060");