2 * net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
3 * Copyright (c) 2008-2009 Marvell Semiconductor
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
11 #include <linux/delay.h>
12 #include <linux/etherdevice.h>
13 #include <linux/jiffies.h>
14 #include <linux/list.h>
15 #include <linux/module.h>
16 #include <linux/netdevice.h>
17 #include <linux/phy.h>
19 #include "mv88e6060.h"
21 static int reg_read(struct dsa_switch *ds, int addr, int reg)
23 struct mv88e6060_priv *priv = ds->priv;
25 return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
28 #define REG_READ(addr, reg) \
32 __ret = reg_read(ds, addr, reg); \
39 static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
41 struct mv88e6060_priv *priv = ds->priv;
43 return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
46 #define REG_WRITE(addr, reg, val) \
50 __ret = reg_write(ds, addr, reg, val); \
55 static const char *mv88e6060_get_name(struct mii_bus *bus, int sw_addr)
59 ret = mdiobus_read(bus, sw_addr + REG_PORT(0), PORT_SWITCH_ID);
61 if (ret == PORT_SWITCH_ID_6060)
62 return "Marvell 88E6060 (A0)";
63 if (ret == PORT_SWITCH_ID_6060_R1 ||
64 ret == PORT_SWITCH_ID_6060_R2)
65 return "Marvell 88E6060 (B0)";
66 if ((ret & PORT_SWITCH_ID_6060_MASK) == PORT_SWITCH_ID_6060)
67 return "Marvell 88E6060";
73 static enum dsa_tag_protocol mv88e6060_get_tag_protocol(struct dsa_switch *ds,
76 return DSA_TAG_PROTO_TRAILER;
79 static const char *mv88e6060_drv_probe(struct device *dsa_dev,
80 struct device *host_dev, int sw_addr,
83 struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
84 struct mv88e6060_priv *priv;
87 name = mv88e6060_get_name(bus, sw_addr);
89 priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL);
94 priv->sw_addr = sw_addr;
100 static int mv88e6060_switch_reset(struct dsa_switch *ds)
104 unsigned long timeout;
106 /* Set all ports to the disabled state. */
107 for (i = 0; i < MV88E6060_PORTS; i++) {
108 ret = REG_READ(REG_PORT(i), PORT_CONTROL);
109 REG_WRITE(REG_PORT(i), PORT_CONTROL,
110 ret & ~PORT_CONTROL_STATE_MASK);
113 /* Wait for transmit queues to drain. */
114 usleep_range(2000, 4000);
116 /* Reset the switch. */
117 REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
118 GLOBAL_ATU_CONTROL_SWRESET |
119 GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
120 GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
122 /* Wait up to one second for reset to complete. */
123 timeout = jiffies + 1 * HZ;
124 while (time_before(jiffies, timeout)) {
125 ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
126 if (ret & GLOBAL_STATUS_INIT_READY)
129 usleep_range(1000, 2000);
131 if (time_after(jiffies, timeout))
137 static int mv88e6060_setup_global(struct dsa_switch *ds)
139 /* Disable discarding of frames with excessive collisions,
140 * set the maximum frame size to 1536 bytes, and mask all
143 REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536);
145 /* Enable automatic address learning, set the address
146 * database size to 1024 entries, and set the default aging
149 REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
150 GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
151 GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
156 static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
158 int addr = REG_PORT(p);
160 /* Do not force flow control, disable Ingress and Egress
161 * Header tagging, disable VLAN tunneling, and set the port
162 * state to Forwarding. Additionally, if this is the CPU
163 * port, enable Ingress and Egress Trailer tagging mode.
165 REG_WRITE(addr, PORT_CONTROL,
166 dsa_is_cpu_port(ds, p) ?
167 PORT_CONTROL_TRAILER |
168 PORT_CONTROL_INGRESS_MODE |
169 PORT_CONTROL_STATE_FORWARDING :
170 PORT_CONTROL_STATE_FORWARDING);
172 /* Port based VLAN map: give each port its own address
173 * database, allow the CPU port to talk to each of the 'real'
174 * ports, and allow each of the 'real' ports to only talk to
177 REG_WRITE(addr, PORT_VLAN_MAP,
178 ((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
179 (dsa_is_cpu_port(ds, p) ? dsa_user_ports(ds) :
180 BIT(dsa_to_port(ds, p)->cpu_dp->index)));
182 /* Port Association Vector: when learning source addresses
183 * of packets, add the address to the address database using
184 * a port bitmap that has only the bit for this port set and
185 * the other bits clear.
187 REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p));
192 static int mv88e6060_setup_addr(struct dsa_switch *ds)
197 eth_random_addr(addr);
199 val = addr[0] << 8 | addr[1];
201 /* The multicast bit is always transmitted as a zero, so the switch uses
202 * bit 8 for "DiffAddr", where 0 means all ports transmit the same SA.
206 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, val);
207 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);
208 REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);
213 static int mv88e6060_setup(struct dsa_switch *ds)
218 ret = mv88e6060_switch_reset(ds);
222 /* @@@ initialise atu */
224 ret = mv88e6060_setup_global(ds);
228 ret = mv88e6060_setup_addr(ds);
232 for (i = 0; i < MV88E6060_PORTS; i++) {
233 ret = mv88e6060_setup_port(ds, i);
241 static int mv88e6060_port_to_phy_addr(int port)
243 if (port >= 0 && port < MV88E6060_PORTS)
248 static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
252 addr = mv88e6060_port_to_phy_addr(port);
256 return reg_read(ds, addr, regnum);
260 mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
264 addr = mv88e6060_port_to_phy_addr(port);
268 return reg_write(ds, addr, regnum, val);
271 static const struct dsa_switch_ops mv88e6060_switch_ops = {
272 .get_tag_protocol = mv88e6060_get_tag_protocol,
273 .probe = mv88e6060_drv_probe,
274 .setup = mv88e6060_setup,
275 .phy_read = mv88e6060_phy_read,
276 .phy_write = mv88e6060_phy_write,
279 static struct dsa_switch_driver mv88e6060_switch_drv = {
280 .ops = &mv88e6060_switch_ops,
283 static int __init mv88e6060_init(void)
285 register_switch_driver(&mv88e6060_switch_drv);
288 module_init(mv88e6060_init);
290 static void __exit mv88e6060_cleanup(void)
292 unregister_switch_driver(&mv88e6060_switch_drv);
294 module_exit(mv88e6060_cleanup);
296 MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
297 MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
298 MODULE_LICENSE("GPL");
299 MODULE_ALIAS("platform:mv88e6060");