Initial import

1 files changed, 939 insertions, 0 deletions

diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c
new file mode 100644
index 000000000..392e29a02
--- /dev/null
+++ b/net/dsa/dsa.c
@@ -0,0 +1,939 @@
+/*
+ * 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/ctype.h>
+#include <linux/device.h>
+#include <linux/hwmon.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <net/dsa.h>
+#include <linux/of.h>
+#include <linux/of_mdio.h>
+#include <linux/of_platform.h>
+#include <linux/of_net.h>
+#include <linux/sysfs.h>
+#include "dsa_priv.h"
+
+char dsa_driver_version[] = "0.1";
+
+
+/* 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 struct dsa_switch_driver *
+dsa_switch_probe(struct device *host_dev, int sw_addr, char **_name)
+{
+	struct dsa_switch_driver *ret;
+	struct list_head *list;
+	char *name;
+
+	ret = NULL;
+	name = NULL;
+
+	mutex_lock(&dsa_switch_drivers_mutex);
+	list_for_each(list, &dsa_switch_drivers) {
+		struct dsa_switch_driver *drv;
+
+		drv = list_entry(list, struct dsa_switch_driver, list);
+
+		name = drv->probe(host_dev, sw_addr);
+		if (name != NULL) {
+			ret = drv;
+			break;
+		}
+	}
+	mutex_unlock(&dsa_switch_drivers_mutex);
+
+	*_name = name;
+
+	return ret;
+}
+
+/* hwmon support ************************************************************/
+
+#ifdef CONFIG_NET_DSA_HWMON
+
+static ssize_t temp1_input_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct dsa_switch *ds = dev_get_drvdata(dev);
+	int temp, ret;
+
+	ret = ds->drv->get_temp(ds, &temp);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%d\n", temp * 1000);
+}
+static DEVICE_ATTR_RO(temp1_input);
+
+static ssize_t temp1_max_show(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	struct dsa_switch *ds = dev_get_drvdata(dev);
+	int temp, ret;
+
+	ret = ds->drv->get_temp_limit(ds, &temp);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%d\n", temp * 1000);
+}
+
+static ssize_t temp1_max_store(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	struct dsa_switch *ds = dev_get_drvdata(dev);
+	int temp, ret;
+
+	ret = kstrtoint(buf, 0, &temp);
+	if (ret < 0)
+		return ret;
+
+	ret = ds->drv->set_temp_limit(ds, DIV_ROUND_CLOSEST(temp, 1000));
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+static DEVICE_ATTR_RW(temp1_max);
+
+static ssize_t temp1_max_alarm_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct dsa_switch *ds = dev_get_drvdata(dev);
+	bool alarm;
+	int ret;
+
+	ret = ds->drv->get_temp_alarm(ds, &alarm);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%d\n", alarm);
+}
+static DEVICE_ATTR_RO(temp1_max_alarm);
+
+static struct attribute *dsa_hwmon_attrs[] = {
+	&dev_attr_temp1_input.attr,	/* 0 */
+	&dev_attr_temp1_max.attr,	/* 1 */
+	&dev_attr_temp1_max_alarm.attr,	/* 2 */
+	NULL
+};
+
+static umode_t dsa_hwmon_attrs_visible(struct kobject *kobj,
+				       struct attribute *attr, int index)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct dsa_switch *ds = dev_get_drvdata(dev);
+	struct dsa_switch_driver *drv = ds->drv;
+	umode_t mode = attr->mode;
+
+	if (index == 1) {
+		if (!drv->get_temp_limit)
+			mode = 0;
+		else if (!drv->set_temp_limit)
+			mode &= ~S_IWUSR;
+	} else if (index == 2 && !drv->get_temp_alarm) {
+		mode = 0;
+	}
+	return mode;
+}
+
+static const struct attribute_group dsa_hwmon_group = {
+	.attrs = dsa_hwmon_attrs,
+	.is_visible = dsa_hwmon_attrs_visible,
+};
+__ATTRIBUTE_GROUPS(dsa_hwmon);
+
+#endif /* CONFIG_NET_DSA_HWMON */
+
+/* basic switch operations **************************************************/
+static int dsa_switch_setup_one(struct dsa_switch *ds, struct device *parent)
+{
+	struct dsa_switch_driver *drv = ds->drv;
+	struct dsa_switch_tree *dst = ds->dst;
+	struct dsa_chip_data *pd = ds->pd;
+	bool valid_name_found = false;
+	int index = ds->index;
+	int i, ret;
+
+	/*
+	 * Validate supplied switch configuration.
+	 */
+	for (i = 0; i < DSA_MAX_PORTS; i++) {
+		char *name;
+
+		name = pd->port_names[i];
+		if (name == NULL)
+			continue;
+
+		if (!strcmp(name, "cpu")) {
+			if (dst->cpu_switch != -1) {
+				netdev_err(dst->master_netdev,
+					   "multiple cpu ports?!\n");
+				ret = -EINVAL;
+				goto out;
+			}
+			dst->cpu_switch = index;
+			dst->cpu_port = i;
+		} else if (!strcmp(name, "dsa")) {
+			ds->dsa_port_mask |= 1 << i;
+		} else {
+			ds->phys_port_mask |= 1 << i;
+		}
+		valid_name_found = true;
+	}
+
+	if (!valid_name_found && i == DSA_MAX_PORTS) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	/* Make the built-in MII bus mask match the number of ports,
+	 * switch drivers can override this later
+	 */
+	ds->phys_mii_mask = ds->phys_port_mask;
+
+	/*
+	 * If the CPU connects to this switch, set the switch tree
+	 * tagging protocol to the preferred tagging format of this
+	 * switch.
+	 */
+	if (dst->cpu_switch == index) {
+		switch (ds->tag_protocol) {
+#ifdef CONFIG_NET_DSA_TAG_DSA
+		case DSA_TAG_PROTO_DSA:
+			dst->rcv = dsa_netdev_ops.rcv;
+			break;
+#endif
+#ifdef CONFIG_NET_DSA_TAG_EDSA
+		case DSA_TAG_PROTO_EDSA:
+			dst->rcv = edsa_netdev_ops.rcv;
+			break;
+#endif
+#ifdef CONFIG_NET_DSA_TAG_TRAILER
+		case DSA_TAG_PROTO_TRAILER:
+			dst->rcv = trailer_netdev_ops.rcv;
+			break;
+#endif
+#ifdef CONFIG_NET_DSA_TAG_BRCM
+		case DSA_TAG_PROTO_BRCM:
+			dst->rcv = brcm_netdev_ops.rcv;
+			break;
+#endif
+		case DSA_TAG_PROTO_NONE:
+			break;
+		default:
+			ret = -ENOPROTOOPT;
+			goto out;
+		}
+
+		dst->tag_protocol = ds->tag_protocol;
+	}
+
+	/*
+	 * Do basic register setup.
+	 */
+	ret = drv->setup(ds);
+	if (ret < 0)
+		goto out;
+
+	ret = drv->set_addr(ds, dst->master_netdev->dev_addr);
+	if (ret < 0)
+		goto out;
+
+	ds->slave_mii_bus = mdiobus_alloc();
+	if (ds->slave_mii_bus == NULL) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	dsa_slave_mii_bus_init(ds);
+
+	ret = mdiobus_register(ds->slave_mii_bus);
+	if (ret < 0)
+		goto out_free;
+
+
+	/*
+	 * Create network devices for physical switch ports.
+	 */
+	for (i = 0; i < DSA_MAX_PORTS; i++) {
+		if (!(ds->phys_port_mask & (1 << i)))
+			continue;
+
+		ret = dsa_slave_create(ds, parent, i, pd->port_names[i]);
+		if (ret < 0) {
+			netdev_err(dst->master_netdev, "[%d]: can't create dsa slave device for port %d(%s)\n",
+				   index, i, pd->port_names[i]);
+			ret = 0;
+		}
+	}
+
+#ifdef CONFIG_NET_DSA_HWMON
+	/* If the switch provides a temperature sensor,
+	 * register with hardware monitoring subsystem.
+	 * Treat registration error as non-fatal and ignore it.
+	 */
+	if (drv->get_temp) {
+		const char *netname = netdev_name(dst->master_netdev);
+		char hname[IFNAMSIZ + 1];
+		int i, j;
+
+		/* Create valid hwmon 'name' attribute */
+		for (i = j = 0; i < IFNAMSIZ && netname[i]; i++) {
+			if (isalnum(netname[i]))
+				hname[j++] = netname[i];
+		}
+		hname[j] = '\0';
+		scnprintf(ds->hwmon_name, sizeof(ds->hwmon_name), "%s_dsa%d",
+			  hname, index);
+		ds->hwmon_dev = hwmon_device_register_with_groups(NULL,
+					ds->hwmon_name, ds, dsa_hwmon_groups);
+		if (IS_ERR(ds->hwmon_dev))
+			ds->hwmon_dev = NULL;
+	}
+#endif /* CONFIG_NET_DSA_HWMON */
+
+	return ret;
+
+out_free:
+	mdiobus_free(ds->slave_mii_bus);
+out:
+	kfree(ds);
+	return ret;
+}
+
+static struct dsa_switch *
+dsa_switch_setup(struct dsa_switch_tree *dst, int index,
+		 struct device *parent, struct device *host_dev)
+{
+	struct dsa_chip_data *pd = dst->pd->chip + index;
+	struct dsa_switch_driver *drv;
+	struct dsa_switch *ds;
+	int ret;
+	char *name;
+
+	/*
+	 * Probe for switch model.
+	 */
+	drv = dsa_switch_probe(host_dev, pd->sw_addr, &name);
+	if (drv == NULL) {
+		netdev_err(dst->master_netdev, "[%d]: could not detect attached switch\n",
+			   index);
+		return ERR_PTR(-EINVAL);
+	}
+	netdev_info(dst->master_netdev, "[%d]: detected a %s switch\n",
+		    index, name);
+
+
+	/*
+	 * Allocate and initialise switch state.
+	 */
+	ds = kzalloc(sizeof(*ds) + drv->priv_size, GFP_KERNEL);
+	if (ds == NULL)
+		return ERR_PTR(-ENOMEM);
+
+	ds->dst = dst;
+	ds->index = index;
+	ds->pd = pd;
+	ds->drv = drv;
+	ds->tag_protocol = drv->tag_protocol;
+	ds->master_dev = host_dev;
+
+	ret = dsa_switch_setup_one(ds, parent);
+	if (ret)
+		return ERR_PTR(ret);
+
+	return ds;
+}
+
+static void dsa_switch_destroy(struct dsa_switch *ds)
+{
+#ifdef CONFIG_NET_DSA_HWMON
+	if (ds->hwmon_dev)
+		hwmon_device_unregister(ds->hwmon_dev);
+#endif
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int dsa_switch_suspend(struct dsa_switch *ds)
+{
+	int i, ret = 0;
+
+	/* Suspend slave network devices */
+	for (i = 0; i < DSA_MAX_PORTS; i++) {
+		if (!dsa_is_port_initialized(ds, i))
+			continue;
+
+		ret = dsa_slave_suspend(ds->ports[i]);
+		if (ret)
+			return ret;
+	}
+
+	if (ds->drv->suspend)
+		ret = ds->drv->suspend(ds);
+
+	return ret;
+}
+
+static int dsa_switch_resume(struct dsa_switch *ds)
+{
+	int i, ret = 0;
+
+	if (ds->drv->resume)
+		ret = ds->drv->resume(ds);
+
+	if (ret)
+		return ret;
+
+	/* Resume slave network devices */
+	for (i = 0; i < DSA_MAX_PORTS; i++) {
+		if (!dsa_is_port_initialized(ds, i))
+			continue;
+
+		ret = dsa_slave_resume(ds->ports[i]);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+#endif
+
+
+/* link polling *************************************************************/
+static void dsa_link_poll_work(struct work_struct *ugly)
+{
+	struct dsa_switch_tree *dst;
+	int i;
+
+	dst = container_of(ugly, struct dsa_switch_tree, link_poll_work);
+
+	for (i = 0; i < dst->pd->nr_chips; i++) {
+		struct dsa_switch *ds = dst->ds[i];
+
+		if (ds != NULL && ds->drv->poll_link != NULL)
+			ds->drv->poll_link(ds);
+	}
+
+	mod_timer(&dst->link_poll_timer, round_jiffies(jiffies + HZ));
+}
+
+static void dsa_link_poll_timer(unsigned long _dst)
+{
+	struct dsa_switch_tree *dst = (void *)_dst;
+
+	schedule_work(&dst->link_poll_work);
+}
+
+
+/* platform driver init and cleanup *****************************************/
+static int dev_is_class(struct device *dev, void *class)
+{
+	if (dev->class != NULL && !strcmp(dev->class->name, class))
+		return 1;
+
+	return 0;
+}
+
+static struct device *dev_find_class(struct device *parent, char *class)
+{
+	if (dev_is_class(parent, class)) {
+		get_device(parent);
+		return parent;
+	}
+
+	return device_find_child(parent, class, dev_is_class);
+}
+
+struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
+{
+	struct device *d;
+
+	d = dev_find_class(dev, "mdio_bus");
+	if (d != NULL) {
+		struct mii_bus *bus;
+
+		bus = to_mii_bus(d);
+		put_device(d);
+
+		return bus;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
+
+static struct net_device *dev_to_net_device(struct device *dev)
+{
+	struct device *d;
+
+	d = dev_find_class(dev, "net");
+	if (d != NULL) {
+		struct net_device *nd;
+
+		nd = to_net_dev(d);
+		dev_hold(nd);
+		put_device(d);
+
+		return nd;
+	}
+
+	return NULL;
+}
+
+#ifdef CONFIG_OF
+static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
+					struct dsa_chip_data *cd,
+					int chip_index, int port_index,
+					struct device_node *link)
+{
+	const __be32 *reg;
+	int link_sw_addr;
+	struct device_node *parent_sw;
+	int len;
+
+	parent_sw = of_get_parent(link);
+	if (!parent_sw)
+		return -EINVAL;
+
+	reg = of_get_property(parent_sw, "reg", &len);
+	if (!reg || (len != sizeof(*reg) * 2))
+		return -EINVAL;
+
+	/*
+	 * Get the destination switch number from the second field of its 'reg'
+	 * property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
+	 */
+	link_sw_addr = be32_to_cpup(reg + 1);
+
+	if (link_sw_addr >= pd->nr_chips)
+		return -EINVAL;
+
+	/* First time routing table allocation */
+	if (!cd->rtable) {
+		cd->rtable = kmalloc_array(pd->nr_chips, sizeof(s8),
+					   GFP_KERNEL);
+		if (!cd->rtable)
+			return -ENOMEM;
+
+		/* default to no valid uplink/downlink */
+		memset(cd->rtable, -1, pd->nr_chips * sizeof(s8));
+	}
+
+	cd->rtable[link_sw_addr] = port_index;
+
+	return 0;
+}
+
+static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
+{
+	int i;
+	int port_index;
+
+	for (i = 0; i < pd->nr_chips; i++) {
+		port_index = 0;
+		while (port_index < DSA_MAX_PORTS) {
+			kfree(pd->chip[i].port_names[port_index]);
+			port_index++;
+		}
+		kfree(pd->chip[i].rtable);
+	}
+	kfree(pd->chip);
+}
+
+static int dsa_of_probe(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	struct device_node *child, *mdio, *ethernet, *port, *link;
+	struct mii_bus *mdio_bus;
+	struct net_device *ethernet_dev;
+	struct dsa_platform_data *pd;
+	struct dsa_chip_data *cd;
+	const char *port_name;
+	int chip_index, port_index;
+	const unsigned int *sw_addr, *port_reg;
+	u32 eeprom_len;
+	int ret;
+
+	mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
+	if (!mdio)
+		return -EINVAL;
+
+	mdio_bus = of_mdio_find_bus(mdio);
+	if (!mdio_bus)
+		return -EPROBE_DEFER;
+
+	ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
+	if (!ethernet)
+		return -EINVAL;
+
+	ethernet_dev = of_find_net_device_by_node(ethernet);
+	if (!ethernet_dev)
+		return -EPROBE_DEFER;
+
+	pd = kzalloc(sizeof(*pd), GFP_KERNEL);
+	if (!pd)
+		return -ENOMEM;
+
+	dev->platform_data = pd;
+	pd->of_netdev = ethernet_dev;
+	pd->nr_chips = of_get_available_child_count(np);
+	if (pd->nr_chips > DSA_MAX_SWITCHES)
+		pd->nr_chips = DSA_MAX_SWITCHES;
+
+	pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
+			   GFP_KERNEL);
+	if (!pd->chip) {
+		ret = -ENOMEM;
+		goto out_free;
+	}
+
+	chip_index = -1;
+	for_each_available_child_of_node(np, child) {
+		chip_index++;
+		cd = &pd->chip[chip_index];
+
+		cd->of_node = child;
+		cd->host_dev = &mdio_bus->dev;
+
+		sw_addr = of_get_property(child, "reg", NULL);
+		if (!sw_addr)
+			continue;
+
+		cd->sw_addr = be32_to_cpup(sw_addr);
+		if (cd->sw_addr > PHY_MAX_ADDR)
+			continue;
+
+		if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
+			cd->eeprom_len = eeprom_len;
+
+		for_each_available_child_of_node(child, port) {
+			port_reg = of_get_property(port, "reg", NULL);
+			if (!port_reg)
+				continue;
+
+			port_index = be32_to_cpup(port_reg);
+
+			port_name = of_get_property(port, "label", NULL);
+			if (!port_name)
+				continue;
+
+			cd->port_dn[port_index] = port;
+
+			cd->port_names[port_index] = kstrdup(port_name,
+					GFP_KERNEL);
+			if (!cd->port_names[port_index]) {
+				ret = -ENOMEM;
+				goto out_free_chip;
+			}
+
+			link = of_parse_phandle(port, "link", 0);
+
+			if (!strcmp(port_name, "dsa") && link &&
+					pd->nr_chips > 1) {
+				ret = dsa_of_setup_routing_table(pd, cd,
+						chip_index, port_index, link);
+				if (ret)
+					goto out_free_chip;
+			}
+
+			if (port_index == DSA_MAX_PORTS)
+				break;
+		}
+	}
+
+	return 0;
+
+out_free_chip:
+	dsa_of_free_platform_data(pd);
+out_free:
+	kfree(pd);
+	dev->platform_data = NULL;
+	return ret;
+}
+
+static void dsa_of_remove(struct device *dev)
+{
+	struct dsa_platform_data *pd = dev->platform_data;
+
+	if (!dev->of_node)
+		return;
+
+	dsa_of_free_platform_data(pd);
+	kfree(pd);
+}
+#else
+static inline int dsa_of_probe(struct device *dev)
+{
+	return 0;
+}
+
+static inline void dsa_of_remove(struct device *dev)
+{
+}
+#endif
+
+static void dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
+			  struct device *parent, struct dsa_platform_data *pd)
+{
+	int i;
+
+	dst->pd = pd;
+	dst->master_netdev = dev;
+	dst->cpu_switch = -1;
+	dst->cpu_port = -1;
+
+	for (i = 0; i < pd->nr_chips; i++) {
+		struct dsa_switch *ds;
+
+		ds = dsa_switch_setup(dst, i, parent, pd->chip[i].host_dev);
+		if (IS_ERR(ds)) {
+			netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
+				   i, PTR_ERR(ds));
+			continue;
+		}
+
+		dst->ds[i] = ds;
+		if (ds->drv->poll_link != NULL)
+			dst->link_poll_needed = 1;
+	}
+
+	/*
+	 * If we use a tagging format that doesn't have an ethertype
+	 * field, make sure that all packets from this point on get
+	 * sent to the tag format's receive function.
+	 */
+	wmb();
+	dev->dsa_ptr = (void *)dst;
+
+	if (dst->link_poll_needed) {
+		INIT_WORK(&dst->link_poll_work, dsa_link_poll_work);
+		init_timer(&dst->link_poll_timer);
+		dst->link_poll_timer.data = (unsigned long)dst;
+		dst->link_poll_timer.function = dsa_link_poll_timer;
+		dst->link_poll_timer.expires = round_jiffies(jiffies + HZ);
+		add_timer(&dst->link_poll_timer);
+	}
+}
+
+static int dsa_probe(struct platform_device *pdev)
+{
+	struct dsa_platform_data *pd = pdev->dev.platform_data;
+	struct net_device *dev;
+	struct dsa_switch_tree *dst;
+	int ret;
+
+	pr_notice_once("Distributed Switch Architecture driver version %s\n",
+		       dsa_driver_version);
+
+	if (pdev->dev.of_node) {
+		ret = dsa_of_probe(&pdev->dev);
+		if (ret)
+			return ret;
+
+		pd = pdev->dev.platform_data;
+	}
+
+	if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
+		return -EINVAL;
+
+	if (pd->of_netdev) {
+		dev = pd->of_netdev;
+		dev_hold(dev);
+	} else {
+		dev = dev_to_net_device(pd->netdev);
+	}
+	if (dev == NULL) {
+		ret = -EPROBE_DEFER;
+		goto out;
+	}
+
+	if (dev->dsa_ptr != NULL) {
+		dev_put(dev);
+		ret = -EEXIST;
+		goto out;
+	}
+
+	dst = kzalloc(sizeof(*dst), GFP_KERNEL);
+	if (dst == NULL) {
+		dev_put(dev);
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	platform_set_drvdata(pdev, dst);
+
+	dsa_setup_dst(dst, dev, &pdev->dev, pd);
+
+	return 0;
+
+out:
+	dsa_of_remove(&pdev->dev);
+
+	return ret;
+}
+
+static void dsa_remove_dst(struct dsa_switch_tree *dst)
+{
+	int i;
+
+	if (dst->link_poll_needed)
+		del_timer_sync(&dst->link_poll_timer);
+
+	flush_work(&dst->link_poll_work);
+
+	for (i = 0; i < dst->pd->nr_chips; i++) {
+		struct dsa_switch *ds = dst->ds[i];
+
+		if (ds != NULL)
+			dsa_switch_destroy(ds);
+	}
+}
+
+static int dsa_remove(struct platform_device *pdev)
+{
+	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+
+	dsa_remove_dst(dst);
+	dsa_of_remove(&pdev->dev);
+
+	return 0;
+}
+
+static void dsa_shutdown(struct platform_device *pdev)
+{
+}
+
+static int dsa_switch_rcv(struct sk_buff *skb, struct net_device *dev,
+			  struct packet_type *pt, struct net_device *orig_dev)
+{
+	struct dsa_switch_tree *dst = dev->dsa_ptr;
+
+	if (unlikely(dst == NULL)) {
+		kfree_skb(skb);
+		return 0;
+	}
+
+	return dst->rcv(skb, dev, pt, orig_dev);
+}
+
+static struct packet_type dsa_pack_type __read_mostly = {
+	.type	= cpu_to_be16(ETH_P_XDSA),
+	.func	= dsa_switch_rcv,
+};
+
+static struct notifier_block dsa_netdevice_nb __read_mostly = {
+	.notifier_call	= dsa_slave_netdevice_event,
+};
+
+#ifdef CONFIG_PM_SLEEP
+static int dsa_suspend(struct device *d)
+{
+	struct platform_device *pdev = to_platform_device(d);
+	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+	int i, ret = 0;
+
+	for (i = 0; i < dst->pd->nr_chips; i++) {
+		struct dsa_switch *ds = dst->ds[i];
+
+		if (ds != NULL)
+			ret = dsa_switch_suspend(ds);
+	}
+
+	return ret;
+}
+
+static int dsa_resume(struct device *d)
+{
+	struct platform_device *pdev = to_platform_device(d);
+	struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
+	int i, ret = 0;
+
+	for (i = 0; i < dst->pd->nr_chips; i++) {
+		struct dsa_switch *ds = dst->ds[i];
+
+		if (ds != NULL)
+			ret = dsa_switch_resume(ds);
+	}
+
+	return ret;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
+
+static const struct of_device_id dsa_of_match_table[] = {
+	{ .compatible = "brcm,bcm7445-switch-v4.0" },
+	{ .compatible = "marvell,dsa", },
+	{}
+};
+MODULE_DEVICE_TABLE(of, dsa_of_match_table);
+
+static struct platform_driver dsa_driver = {
+	.probe		= dsa_probe,
+	.remove		= dsa_remove,
+	.shutdown	= dsa_shutdown,
+	.driver = {
+		.name	= "dsa",
+		.of_match_table = dsa_of_match_table,
+		.pm	= &dsa_pm_ops,
+	},
+};
+
+static int __init dsa_init_module(void)
+{
+	int rc;
+
+	register_netdevice_notifier(&dsa_netdevice_nb);
+
+	rc = platform_driver_register(&dsa_driver);
+	if (rc)
+		return rc;
+
+	dev_add_pack(&dsa_pack_type);
+
+	return 0;
+}
+module_init(dsa_init_module);
+
+static void __exit dsa_cleanup_module(void)
+{
+	unregister_netdevice_notifier(&dsa_netdevice_nb);
+	dev_remove_pack(&dsa_pack_type);
+	platform_driver_unregister(&dsa_driver);
+}
+module_exit(dsa_cleanup_module);
+
+MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");
+MODULE_DESCRIPTION("Driver for Distributed Switch Architecture switch chips");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:dsa");