/*
* net/dsa/dsa.c - Hardware switch handling
* Copyright (c) 2008-2009 Marvell Semiconductor
* Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
*
* 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/device.h>
#include <linux/list.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_mdio.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/of_gpio.h>
#include <linux/netdevice.h>
#include <linux/sysfs.h>
#include <linux/phy_fixed.h>
#include <linux/gpio/consumer.h>
#include <net/dsa.h>
#include "dsa_priv.h"
static struct sk_buff *dsa_slave_notag_xmit(struct sk_buff *skb,
struct net_device *dev)
{
/* Just return the original SKB */
return skb;
}
static const struct dsa_device_ops none_ops = {
.xmit = dsa_slave_notag_xmit,
.rcv = NULL,
};
const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = {
#ifdef CONFIG_NET_DSA_TAG_DSA
[DSA_TAG_PROTO_DSA] = &dsa_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_EDSA
[DSA_TAG_PROTO_EDSA] = &edsa_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_TRAILER
[DSA_TAG_PROTO_TRAILER] = &trailer_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_BRCM
[DSA_TAG_PROTO_BRCM] = &brcm_netdev_ops,
#endif
#ifdef CONFIG_NET_DSA_TAG_QCA
[DSA_TAG_PROTO_QCA] = &qca_netdev_ops,
#endif
[DSA_TAG_PROTO_NONE] = &none_ops,
};
/* switch driver registration ***********************************************/
static DEFINE_MUTEX(dsa_switch_drivers_mutex);
static LIST_HEAD(dsa_switch_drivers);
void register_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_add_tail(&drv->list, &dsa_switch_drivers);
mutex_unlock(&dsa_switch_drivers_mutex);
}
EXPORT_SYMBOL_GPL(register_switch_driver);
void unregister_switch_driver(struct dsa_switch_driver *drv)
{
mutex_lock(&dsa_switch_drivers_mutex);
list_del_init(&drv->list);
mutex_unlock(&dsa_switch_drivers_mutex);
}
EXPORT_SYMBOL_GPL(unregister_switch_driver);
static const struct dsa_switch_ops *
dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
const char **_name, void **priv)
{
const struct dsa_switch_ops *ret;
struct list_head *list;
const char *name;
ret = NULL;
name = NULL;
mutex_lock(&dsa_switch_drivers_mutex);
list_for_each(list, &dsa_switch_drivers) {
const struct dsa_switch_ops *ops;
struct dsa_switch_driver *drv;
drv = list_entry(list, struct dsa_switch_driver, list);
ops = drv->ops;
name = ops->probe(parent, host_dev, sw_addr, priv);
if (name != NULL) {
ret = ops;
break;
}
}
mutex_unlock(&dsa_switch_drivers_mutex);
*_name = name;
return ret;
}
/* basic switch operations **************************************************/
int dsa_cpu_dsa_setup(struct dsa_switch *ds, struct device *dev,
struct dsa_port *dport, int port)
{
struct device_node *port_dn = dport->dn;
struct phy_device *phydev;
int ret, mode;
if (of_phy_is_fixed_link(port_dn)) {
ret = of_phy_register_fixed_link(port_dn);
if (ret) {
dev_err(dev, "failed to register fixed PHY\n");
return ret;
}
phydev = of_phy_find_device(port_dn);
mode = of_get_phy_mode(port_dn);
if (mode < 0)
mode = PHY_INTERFACE_MODE_NA;
phydev->interface = mode;
genphy_config_init(phydev);
genphy_read_status(phydev);
if (ds->ops->adjust_link)
ds->ops->adjust_link(ds, port, phydev);
put_device(&phydev->mdio.dev);
}
return 0;
}
static int dsa_cpu_dsa_setups(struct dsa_switch *ds, struct device *dev)
{
struct dsa_port *dport;
int ret, port;
for (port = 0; port < ds->num_ports; port++) {
if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
continue;
dport = &ds->ports[port];
ret = dsa_cpu_dsa_setup(ds,