/*
* net/dsa/mv88e6060.c - Driver for Marvell 88e6060 switch chips
* Copyright (c) 2008-2009 Marvell Semiconductor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/delay.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 dsa_switch *ds, int addr, int reg)
{
struct mv88e6060_priv *priv = ds->priv;
return mdiobus_read_nested(priv->bus, priv->sw_addr + addr, reg);
}
#define REG_READ(addr, reg) \
({ \
int __ret; \
\
__ret = reg_read(ds, addr, reg); \
if (__ret < 0) \
return __ret; \
__ret; \
})
static int reg_write(struct dsa_switch *ds, int addr, int reg, u16 val)
{
struct mv88e6060_priv *priv = ds->priv;
return mdiobus_write_nested(priv->bus, priv->sw_addr + addr, reg, val);
}
#define REG_WRITE(addr, reg, val) \
({ \
int __ret; \
\
__ret = reg_write(ds, addr, reg, val); \
if (__ret < 0) \
return __ret; \
})
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)
{
return DSA_TAG_PROTO_TRAILER;
}
static const char *mv88e6060_drv_probe(struct device *dsa_dev,
struct device *host_dev, int sw_addr,
void **_priv)
{
struct mii_bus *bus = dsa_host_dev_to_mii_bus(host_dev);
struct mv88e6060_priv *priv;
const char *name;
name = mv88e6060_get_name(bus, sw_addr);
if (name) {
priv = devm_kzalloc(dsa_dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return NULL;
*_priv = priv;
priv->bus = bus;
priv->sw_addr = sw_addr;
}
return name;
}
static int mv88e6060_switch_reset(struct dsa_switch *ds)
{
int i;
int ret;
unsigned long timeout;
/* Set all ports to the disabled state. */
for (i = 0; i < MV88E6060_PORTS; i++) {
ret = REG_READ(REG_PORT(i), PORT_CONTROL);
REG_WRITE(REG_PORT(i), PORT_CONTROL,
ret & ~PORT_CONTROL_STATE_MASK);
}
/* Wait for transmit queues to drain. */
usleep_range(2000, 4000);
/* Reset the switch. */
REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
GLOBAL_ATU_CONTROL_SWRESET |
GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
/* Wait up to one second for reset to complete. */
timeout = jiffies + 1 * HZ;
while (time_before(jiffies, timeout)) {
ret = REG_READ(REG_GLOBAL, GLOBAL_STATUS);
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 dsa_switch *ds)
{
/* Disable discarding of frames with excessive collisions,
* set the maximum frame size to 1536 bytes, and mask all
* interrupt sources.
*/
REG_WRITE(REG_GLOBAL, GLOBAL_CONTROL, GLOBAL_CONTROL_MAX_FRAME_1536);
/* Enable automatic address learning, set the address
* database size to 1024 entries, and set the default aging
* time to 5 minutes.
*/
REG_WRITE(REG_GLOBAL, GLOBAL_ATU_CONTROL,
GLOBAL_ATU_CONTROL_ATUSIZE_1024 |
GLOBAL_ATU_CONTROL_ATE_AGE_5MIN);
return 0;
}
static int mv88e6060_setup_port(struct dsa_switch *ds, int p)
{
int addr = REG_PORT(p);
/* 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.
*/
REG_WRITE(addr, PORT_CONTROL,
dsa_is_cpu_port(ds, p) ?
PORT_CONTROL_TRAILER |
PORT_CONTROL_INGRESS_MODE |
PORT_CONTROL_STATE_FORWARDING :
PORT_CONTROL_STATE_FORWARDING);
/* 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.
*/
REG_WRITE(addr, PORT_VLAN_MAP,
((p & 0xf) << PORT_VLAN_MAP_DBNUM_SHIFT) |
(dsa_is_cpu_port(ds, p) ?
ds->enabled_port_mask :
BIT(ds->dst->cpu_port)));
/* 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.
*/
REG_WRITE(addr, PORT_ASSOC_VECTOR, BIT(p));
return 0;
}
static int mv88e6060_setup(struct dsa_switch *ds)
{
int ret;
int i;
ret = mv88e6060_switch_reset(ds);
if (ret < 0)
return ret;
/* @@@ initialise atu */
ret = mv88e6060_setup_global(ds);
if (ret < 0)
return ret;
for (i = 0; i < MV88E6060_PORTS; i++) {
ret = mv88e6060_setup_port(ds, i);
if (ret < 0)
return ret;
}
return 0;
}
static int mv88e6060_set_addr(struct dsa_switch *ds, u8 *addr)
{
/* Use the same MAC Address as FD Pause frames for all ports */
REG_WRITE(REG_GLOBAL, GLOBAL_MAC_01, (addr[0] << 9) | addr[1]);
REG_WRITE(REG_GLOBAL, GLOBAL_MAC_23, (addr[2] << 8) | addr[3]);
REG_WRITE(REG_GLOBAL, GLOBAL_MAC_45, (addr[4] << 8) | addr[5]);
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)
{
int addr;
addr = mv88e6060_port_to_phy_addr(port);
if (addr == -1)
return 0xffff;
return reg_read(ds, addr, regnum);
}
static int
mv88e6060_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val)
{
int addr;
addr = mv88e6060_port_to_phy_addr(port);
if (addr == -1)
return 0xffff;
return reg_write(ds, addr, regnum, val);
}
static struct dsa_switch_ops mv88e6060_switch_ops = {
.get_tag_protocol = mv88e6060_get_tag_protocol,
.probe = mv88e6060_drv_probe,
.setup = mv88e6060_setup,
.set_addr = mv88e6060_set_addr,
.phy_read = mv88e6060_phy_read,
.phy_write = mv88e6060_phy_write,
};
static int __init mv88e6060_init(void)
{
register_switch_driver(&mv88e6060_switch_ops);
return 0;
}
module_init(mv88e6060_init);
static void __exit mv88e6060_cleanup(void)
{
unregister_switch_driver(&mv88e6060_switch_ops);
}
module_exit(mv88e6060_cleanup);
MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
MODULE_DESCRIPTION("Driver for Marvell 88E6060 ethernet switch chip");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mv88e6060");
