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/jiffies.h>
13 #include <linux/list.h>
14 #include <linux/module.h>
15 #include <linux/netdevice.h>
16 #include <linux/phy.h>
19 #define REG_PORT(p) (8 + (p))
20 #define REG_GLOBAL 0x0f
22 static int reg_read(struct dsa_switch *ds, int addr, int reg)
24 struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);
29 return mdiobus_read(bus, ds->pd->sw_addr + addr, reg);
32 #define REG_READ(addr, reg) \
36 __ret = reg_read(ds, addr, reg); \
43 static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
45 struct mii_bus *bus = dsa_host_dev_to_mii_bus(ds->master_dev);
50 return mdiobus_write(bus, ds->pd->sw_addr + addr, reg, val);
53 #define REG_WRITE(addr, reg, val) \
57 __ret = reg_write(ds, addr, reg, val); \
62 static char *mv88e6060_probe(struct device *host_dev, int sw_addr)
64 struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
70 ret = mdiobus_read(bus, sw_addr + REG_PORT(0), 0x03);
74 return "Marvell 88E6060";
80 static int mv88e6060_switch_reset(struct dsa_switch *ds)
84 unsigned long timeout;
86 /* Set all ports to the disabled state. */
87 for (i = 0; i < 6; i++) {
88 ret = REG_READ(REG_PORT(i), 0x04);
89 REG_WRITE(REG_PORT(i), 0x04, ret & 0xfffc);
92 /* Wait for transmit queues to drain. */
93 usleep_range(2000, 4000);
95 /* Reset the switch. */
96 REG_WRITE(REG_GLOBAL, 0x0a, 0xa130);
98 /* Wait up to one second for reset to complete. */
99 timeout = jiffies + 1 * HZ;
100 while (time_before(jiffies, timeout)) {
101 ret = REG_READ(REG_GLOBAL, 0x00);
102 if ((ret & 0x8000) == 0x0000)
105 usleep_range(1000, 2000);
107 if (time_after(jiffies, timeout))
113 static int mv88e6060_setup_global(struct dsa_switch *ds)
115 /* Disable discarding of frames with excessive collisions,
116 * set the maximum frame size to 1536 bytes, and mask all
119 REG_WRITE(REG_GLOBAL, 0x04, 0x0800);
121 /* Enable automatic address learning, set the address
122 * database size to 1024 entries, and set the default aging
125 REG_WRITE(REG_GLOBAL, 0x0a, 0x2130);
130 static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
132 int addr = REG_PORT(p);
134 /* Do not force flow control, disable Ingress and Egress
135 * Header tagging, disable VLAN tunneling, and set the port
136 * state to Forwarding. Additionally, if this is the CPU
137 * port, enable Ingress and Egress Trailer tagging mode.
139 REG_WRITE(addr, 0x04, dsa_is_cpu_port(ds, p) ? 0x4103 : 0x0003);
141 /* Port based VLAN map: give each port its own address
142 * database, allow the CPU port to talk to each of the 'real'
143 * ports, and allow each of the 'real' ports to only talk to
146 REG_WRITE(addr, 0x06,
148 (dsa_is_cpu_port(ds, p) ?
150 (1 << ds->dst->cpu_port)));
152 /* Port Association Vector: when learning source addresses
153 * of packets, add the address to the address database using
154 * a port bitmap that has only the bit for this port set and
155 * the other bits clear.
157 REG_WRITE(addr, 0x0b, 1 << p);
162 static int mv88e6060_setup(struct dsa_switch *ds)
167 ret = mv88e6060_switch_reset(ds);
171 /* @@@ initialise atu */
173 ret = mv88e6060_setup_global(ds);
177 for (i = 0; i < 6; i++) {
178 ret = mv88e6060_setup_port(ds, i);
186 static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr)
188 REG_WRITE(REG_GLOBAL, 0x01, (addr[0] << 8) | addr[1]);
189 REG_WRITE(REG_GLOBAL, 0x02, (addr[2] << 8) | addr[3]);
190 REG_WRITE(REG_GLOBAL, 0x03, (addr[4] << 8) | addr[5]);
195 static int mv88e6060_port_to_phy_addr(int port)
197 if (port >= 0 && port <= 5)
202 static int mv88e6060_phy_read(struct dsa_switch *ds, int port, int regnum)
206 addr = mv88e6060_port_to_phy_addr(port);
210 return reg_read(ds, addr, regnum);
214 mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
218 addr = mv88e6060_port_to_phy_addr(port);
222 return reg_write(ds, addr, regnum, val);
225 static void mv88e6060_poll_link(struct dsa_switch *ds)
229 for (i = 0; i < DSA_MAX_PORTS; i++) {
230 struct net_device *dev;
231 int uninitialized_var(port_status);
242 if (dev->flags & IFF_UP) {
243 port_status = reg_read(ds, REG_PORT(i), 0x00);
247 link = !!(port_status & 0x1000);
251 if (netif_carrier_ok(dev)) {
252 netdev_info(dev, "link down\n");
253 netif_carrier_off(dev);
258 speed = (port_status & 0x0100) ? 100 : 10;
259 duplex = (port_status & 0x0200) ? 1 : 0;
260 fc = ((port_status & 0xc000) == 0xc000) ? 1 : 0;
262 if (!netif_carrier_ok(dev)) {
264 "link up, %d Mb/s, %s duplex, flow control %sabled\n",
266 duplex ? "full" : "half",
268 netif_carrier_on(dev);
273 static struct dsa_switch_driver mv88e6060_switch_driver = {
274 .tag_protocol = DSA_TAG_PROTO_TRAILER,
275 .probe = mv88e6060_probe,
276 .setup = mv88e6060_setup,
277 .set_addr = mv88e6060_set_addr,
278 .phy_read = mv88e6060_phy_read,
279 .phy_write = mv88e6060_phy_write,
280 .poll_link = mv88e6060_poll_link,
283 static int __init mv88e6060_init(void)
285 register_switch_driver(&mv88e6060_switch_driver);
288 module_init(mv88e6060_init);
290 static void __exit mv88e6060_cleanup(void)
292 unregister_switch_driver(&mv88e6060_switch_driver);
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");