[linux-2.6-block.git] / drivers / net / dsa / dsa_loop.c

/*
 * Distributed Switch Architecture loopback driver
 *
 * Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
 *
 * 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/platform_device.h>
#include <linux/netdevice.h>
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/export.h>
#include <linux/ethtool.h>
#include <linux/workqueue.h>
#include <linux/module.h>
#include <linux/if_bridge.h>
#include <net/dsa.h>

#include "dsa_loop.h"

struct dsa_loop_vlan {
	u16 members;
	u16 untagged;
};

struct dsa_loop_mib_entry {
	char name[ETH_GSTRING_LEN];
	unsigned long val;
};

enum dsa_loop_mib_counters {
	DSA_LOOP_PHY_READ_OK,
	DSA_LOOP_PHY_READ_ERR,
	DSA_LOOP_PHY_WRITE_OK,
	DSA_LOOP_PHY_WRITE_ERR,
	__DSA_LOOP_CNT_MAX,
};

static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	[DSA_LOOP_PHY_READ_OK]	= { "phy_read_ok", },
	[DSA_LOOP_PHY_READ_ERR]	= { "phy_read_err", },
	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
};

struct dsa_loop_port {
	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
};

#define DSA_LOOP_VLANS	5

struct dsa_loop_priv {
	struct mii_bus	*bus;
	unsigned int	port_base;
	struct dsa_loop_vlan vlans[DSA_LOOP_VLANS];
	struct net_device *netdev;
	struct dsa_loop_port ports[DSA_MAX_PORTS];
	u16 pvid;
};

static struct phy_device *phydevs[PHY_MAX_ADDR];

static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
						   int port)
{
	dev_dbg(ds->dev, "%s\n", __func__);

	return DSA_TAG_PROTO_NONE;
}

static int dsa_loop_setup(struct dsa_switch *ds)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < ds->num_ports; i++)
		memcpy(ps->ports[i].mib, dsa_loop_mibs,
		       sizeof(dsa_loop_mibs));

	dev_dbg(ds->dev, "%s\n", __func__);

	return 0;
}

static int dsa_loop_get_sset_count(struct dsa_switch *ds)
{
	return __DSA_LOOP_CNT_MAX;
}

static void dsa_loop_get_strings(struct dsa_switch *ds, int port, uint8_t *data)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
		memcpy(data + i * ETH_GSTRING_LEN,
		       ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
}

static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
				       uint64_t *data)
{
	struct dsa_loop_priv *ps = ds->priv;
	unsigned int i;

	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
		data[i] = ps->ports[port].mib[i].val;
}

static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
{
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;
	int ret;

	dev_dbg(ds->dev, "%s\n", __func__);

	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	if (ret < 0)
		ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	else
		ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;

	return ret;
}

static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
			      int regnum, u16 value)
{
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;
	int ret;

	dev_dbg(ds->dev, "%s\n", __func__);

	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	if (ret < 0)
		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	else
		ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;

	return ret;
}

static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
				     struct net_device *bridge)
{
	dev_dbg(ds->dev, "%s\n", __func__);

	return 0;
}

static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
				       struct net_device *bridge)
{
	dev_dbg(ds->dev, "%s\n", __func__);
}

static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
					u8 state)
{
	dev_dbg(ds->dev, "%s\n", __func__);
}

static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
					bool vlan_filtering)
{
	dev_dbg(ds->dev, "%s\n", __func__);

	return 0;
}

static int dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port,
				      const struct switchdev_obj_port_vlan *vlan,
				      struct switchdev_trans *trans)
{
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;

	dev_dbg(ds->dev, "%s\n", __func__);

	/* Just do a sleeping operation to make lockdep checks effective */
	mdiobus_read(bus, ps->port_base + port, MII_BMSR);

	if (vlan->vid_end > DSA_LOOP_VLANS)
		return -ERANGE;

	return 0;
}

static void dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
				   const struct switchdev_obj_port_vlan *vlan,
				   struct switchdev_trans *trans)
{
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;
	struct dsa_loop_vlan *vl;
	u16 vid;

	dev_dbg(ds->dev, "%s\n", __func__);

	/* Just do a sleeping operation to make lockdep checks effective */
	mdiobus_read(bus, ps->port_base + port, MII_BMSR);

	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
		vl = &ps->vlans[vid];

		vl->members |= BIT(port);
		if (untagged)
			vl->untagged |= BIT(port);
		else
			vl->untagged &= ~BIT(port);
	}

	if (pvid)
		ps->pvid = vid;
}

static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
				  const struct switchdev_obj_port_vlan *vlan)
{
	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	struct dsa_loop_priv *ps = ds->priv;
	struct mii_bus *bus = ps->bus;
	struct dsa_loop_vlan *vl;
	u16 vid, pvid = ps->pvid;

	dev_dbg(ds->dev, "%s\n", __func__);

	/* Just do a sleeping operation to make lockdep checks effective */
	mdiobus_read(bus, ps->port_base + port, MII_BMSR);

	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
		vl = &ps->vlans[vid];

		vl->members &= ~BIT(port);
		if (untagged)
			vl->untagged &= ~BIT(port);

		if (pvid == vid)
			pvid = 1;
	}
	ps->pvid = pvid;

	return 0;
}

static const struct dsa_switch_ops dsa_loop_driver = {
	.get_tag_protocol	= dsa_loop_get_protocol,
	.setup			= dsa_loop_setup,
	.get_strings		= dsa_loop_get_strings,
	.get_ethtool_stats	= dsa_loop_get_ethtool_stats,
	.get_sset_count		= dsa_loop_get_sset_count,
	.phy_read		= dsa_loop_phy_read,
	.phy_write		= dsa_loop_phy_write,
	.port_bridge_join	= dsa_loop_port_bridge_join,
	.port_bridge_leave	= dsa_loop_port_bridge_leave,
	.port_stp_state_set	= dsa_loop_port_stp_state_set,
	.port_vlan_filtering	= dsa_loop_port_vlan_filtering,
	.port_vlan_prepare	= dsa_loop_port_vlan_prepare,
	.port_vlan_add		= dsa_loop_port_vlan_add,
	.port_vlan_del		= dsa_loop_port_vlan_del,
};

static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
{
	struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
	struct dsa_loop_priv *ps;
	struct dsa_switch *ds;

	if (!pdata)
		return -ENODEV;

	dev_info(&mdiodev->dev, "%s: 0x%0x\n",
		 pdata->name, pdata->enabled_ports);

	ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
	if (!ds)
		return -ENOMEM;

	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
	if (!ps)
		return -ENOMEM;

	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
	if (!ps->netdev)
		return -EPROBE_DEFER;

	pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;

	ds->dev = &mdiodev->dev;
	ds->ops = &dsa_loop_driver;
	ds->priv = ps;
	ps->bus = mdiodev->bus;

	dev_set_drvdata(&mdiodev->dev, ds);

	return dsa_register_switch(ds);
}

static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
{
	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	struct dsa_loop_priv *ps = ds->priv;

	dsa_unregister_switch(ds);
	dev_put(ps->netdev);
}

static struct mdio_driver dsa_loop_drv = {
	.mdiodrv.driver	= {
		.name	= "dsa-loop",
	},
	.probe	= dsa_loop_drv_probe,
	.remove	= dsa_loop_drv_remove,
};

#define NUM_FIXED_PHYS	(DSA_LOOP_NUM_PORTS - 2)

static int __init dsa_loop_init(void)
{
	struct fixed_phy_status status = {
		.link = 1,
		.speed = SPEED_100,
		.duplex = DUPLEX_FULL,
	};
	unsigned int i;

	for (i = 0; i < NUM_FIXED_PHYS; i++)
		phydevs[i] = fixed_phy_register(PHY_POLL, &status, -1, NULL);

	return mdio_driver_register(&dsa_loop_drv);
}
module_init(dsa_loop_init);

static void __exit dsa_loop_exit(void)
{
	unsigned int i;

	mdio_driver_unregister(&dsa_loop_drv);
	for (i = 0; i < NUM_FIXED_PHYS; i++)
		if (!IS_ERR(phydevs[i]))
			fixed_phy_unregister(phydevs[i]);
}
module_exit(dsa_loop_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Florian Fainelli");
MODULE_DESCRIPTION("DSA loopback driver");
Commit	Line	Data
98cd1552 FF	1	/*
	2	* Distributed Switch Architecture loopback driver
	3	*
	4	* Copyright (C) 2016, Florian Fainelli <f.fainelli@gmail.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
	12	#include <linux/platform_device.h>
	13	#include <linux/netdevice.h>
	14	#include <linux/phy.h>
	15	#include <linux/phy_fixed.h>
	16	#include <linux/export.h>
484c0172	17	#include <linux/ethtool.h>
98cd1552 FF	18	#include <linux/workqueue.h>
	19	#include <linux/module.h>
	20	#include <linux/if_bridge.h>
98cd1552 FF	21	#include <net/dsa.h>
	22
	23	#include "dsa_loop.h"
	24
	25	struct dsa_loop_vlan {
	26	u16 members;
	27	u16 untagged;
	28	};
	29
484c0172 FF	30	struct dsa_loop_mib_entry {
	31	char name[ETH_GSTRING_LEN];
	32	unsigned long val;
	33	};
	34
	35	enum dsa_loop_mib_counters {
	36	DSA_LOOP_PHY_READ_OK,
	37	DSA_LOOP_PHY_READ_ERR,
	38	DSA_LOOP_PHY_WRITE_OK,
	39	DSA_LOOP_PHY_WRITE_ERR,
	40	__DSA_LOOP_CNT_MAX,
	41	};
	42
	43	static struct dsa_loop_mib_entry dsa_loop_mibs[] = {
	44	[DSA_LOOP_PHY_READ_OK] = { "phy_read_ok", },
	45	[DSA_LOOP_PHY_READ_ERR] = { "phy_read_err", },
	46	[DSA_LOOP_PHY_WRITE_OK] = { "phy_write_ok", },
	47	[DSA_LOOP_PHY_WRITE_ERR] = { "phy_write_err", },
	48	};
	49
	50	struct dsa_loop_port {
	51	struct dsa_loop_mib_entry mib[__DSA_LOOP_CNT_MAX];
	52	};
	53
98cd1552 FF	54	#define DSA_LOOP_VLANS 5
	55
	56	struct dsa_loop_priv {
	57	struct mii_bus *bus;
	58	unsigned int port_base;
	59	struct dsa_loop_vlan vlans[DSA_LOOP_VLANS];
	60	struct net_device *netdev;
484c0172	61	struct dsa_loop_port ports[DSA_MAX_PORTS];
98cd1552 FF	62	u16 pvid;
	63	};
	64
	65	static struct phy_device *phydevs[PHY_MAX_ADDR];
	66
5ed4e3eb FF	67	static enum dsa_tag_protocol dsa_loop_get_protocol(struct dsa_switch *ds,
5ed4e3eb FF	68	int port)
98cd1552 FF	69	{
	70	dev_dbg(ds->dev, "%s\n", __func__);
	71
	72	return DSA_TAG_PROTO_NONE;
	73	}
	74
	75	static int dsa_loop_setup(struct dsa_switch *ds)
	76	{
484c0172 FF	77	struct dsa_loop_priv *ps = ds->priv;
	78	unsigned int i;
	79
	80	for (i = 0; i < ds->num_ports; i++)
	81	memcpy(ps->ports[i].mib, dsa_loop_mibs,
	82	sizeof(dsa_loop_mibs));
	83
98cd1552 FF	84	dev_dbg(ds->dev, "%s\n", __func__);
	85
	86	return 0;
	87	}
	88
484c0172 FF	89	static int dsa_loop_get_sset_count(struct dsa_switch *ds)
	90	{
	91	return __DSA_LOOP_CNT_MAX;
	92	}
	93
	94	static void dsa_loop_get_strings(struct dsa_switch ds, int port, uint8_t data)
	95	{
	96	struct dsa_loop_priv *ps = ds->priv;
	97	unsigned int i;
	98
	99	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	100	memcpy(data + i * ETH_GSTRING_LEN,
	101	ps->ports[port].mib[i].name, ETH_GSTRING_LEN);
	102	}
	103
	104	static void dsa_loop_get_ethtool_stats(struct dsa_switch *ds, int port,
	105	uint64_t *data)
	106	{
	107	struct dsa_loop_priv *ps = ds->priv;
	108	unsigned int i;
	109
	110	for (i = 0; i < __DSA_LOOP_CNT_MAX; i++)
	111	data[i] = ps->ports[port].mib[i].val;
	112	}
	113
98cd1552 FF	114	static int dsa_loop_phy_read(struct dsa_switch *ds, int port, int regnum)
	115	{
	116	struct dsa_loop_priv *ps = ds->priv;
	117	struct mii_bus *bus = ps->bus;
484c0172	118	int ret;
98cd1552 FF	119
	120	dev_dbg(ds->dev, "%s\n", __func__);
	121
484c0172 FF	122	ret = mdiobus_read_nested(bus, ps->port_base + port, regnum);
	123	if (ret < 0)
	124	ps->ports[port].mib[DSA_LOOP_PHY_READ_ERR].val++;
	125	else
	126	ps->ports[port].mib[DSA_LOOP_PHY_READ_OK].val++;
	127
	128	return ret;
98cd1552 FF	129	}
	130
	131	static int dsa_loop_phy_write(struct dsa_switch *ds, int port,
	132	int regnum, u16 value)
	133	{
	134	struct dsa_loop_priv *ps = ds->priv;
	135	struct mii_bus *bus = ps->bus;
484c0172	136	int ret;
98cd1552 FF	137
	138	dev_dbg(ds->dev, "%s\n", __func__);
	139
484c0172 FF	140	ret = mdiobus_write_nested(bus, ps->port_base + port, regnum, value);
	141	if (ret < 0)
	142	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_ERR].val++;
	143	else
	144	ps->ports[port].mib[DSA_LOOP_PHY_WRITE_OK].val++;
	145
	146	return ret;
98cd1552 FF	147	}
	148
	149	static int dsa_loop_port_bridge_join(struct dsa_switch *ds, int port,
	150	struct net_device *bridge)
	151	{
	152	dev_dbg(ds->dev, "%s\n", __func__);
	153
	154	return 0;
	155	}
	156
	157	static void dsa_loop_port_bridge_leave(struct dsa_switch *ds, int port,
	158	struct net_device *bridge)
	159	{
	160	dev_dbg(ds->dev, "%s\n", __func__);
	161	}
	162
	163	static void dsa_loop_port_stp_state_set(struct dsa_switch *ds, int port,
	164	u8 state)
	165	{
	166	dev_dbg(ds->dev, "%s\n", __func__);
	167	}
	168
	169	static int dsa_loop_port_vlan_filtering(struct dsa_switch *ds, int port,
	170	bool vlan_filtering)
	171	{
	172	dev_dbg(ds->dev, "%s\n", __func__);
	173
	174	return 0;
	175	}
	176
	177	static int dsa_loop_port_vlan_prepare(struct dsa_switch *ds, int port,
	178	const struct switchdev_obj_port_vlan *vlan,
	179	struct switchdev_trans *trans)
	180	{
	181	struct dsa_loop_priv *ps = ds->priv;
	182	struct mii_bus *bus = ps->bus;
	183
	184	dev_dbg(ds->dev, "%s\n", __func__);
	185
	186	/* Just do a sleeping operation to make lockdep checks effective */
	187	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	188
	189	if (vlan->vid_end > DSA_LOOP_VLANS)
	190	return -ERANGE;
	191
	192	return 0;
	193	}
	194
	195	static void dsa_loop_port_vlan_add(struct dsa_switch *ds, int port,
	196	const struct switchdev_obj_port_vlan *vlan,
	197	struct switchdev_trans *trans)
	198	{
	199	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
	200	bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
	201	struct dsa_loop_priv *ps = ds->priv;
	202	struct mii_bus *bus = ps->bus;
	203	struct dsa_loop_vlan *vl;
	204	u16 vid;
	205
	206	dev_dbg(ds->dev, "%s\n", __func__);
	207
	208	/* Just do a sleeping operation to make lockdep checks effective */
	209	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	210
211	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
212	vl = &ps->vlans[vid];
213
214	vl->members \|= BIT(port);
215	if (untagged)
216	vl->untagged \|= BIT(port);
217	else
218	vl->untagged &= ~BIT(port);
219	}
220
221	if (pvid)
222	ps->pvid = vid;
223	}
224
225	static int dsa_loop_port_vlan_del(struct dsa_switch *ds, int port,
226	const struct switchdev_obj_port_vlan *vlan)
227	{
228	bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
229	struct dsa_loop_priv *ps = ds->priv;
230	struct mii_bus *bus = ps->bus;
231	struct dsa_loop_vlan *vl;
5865ccce	232	u16 vid, pvid = ps->pvid;
98cd1552 FF	233
	234	dev_dbg(ds->dev, "%s\n", __func__);
	235
	236	/* Just do a sleeping operation to make lockdep checks effective */
	237	mdiobus_read(bus, ps->port_base + port, MII_BMSR);
	238
	239	for (vid = vlan->vid_begin; vid <= vlan->vid_end; ++vid) {
	240	vl = &ps->vlans[vid];
	241
	242	vl->members &= ~BIT(port);
	243	if (untagged)
	244	vl->untagged &= ~BIT(port);
	245
	246	if (pvid == vid)
	247	pvid = 1;
	248	}
	249	ps->pvid = pvid;
	250
	251	return 0;
	252	}
	253
d78d6776	254	static const struct dsa_switch_ops dsa_loop_driver = {
98cd1552 FF	255	.get_tag_protocol = dsa_loop_get_protocol,
98cd1552 FF	256	.setup = dsa_loop_setup,
484c0172 FF	257	.get_strings = dsa_loop_get_strings,
	258	.get_ethtool_stats = dsa_loop_get_ethtool_stats,
	259	.get_sset_count = dsa_loop_get_sset_count,
98cd1552 FF	260	.phy_read = dsa_loop_phy_read,
	261	.phy_write = dsa_loop_phy_write,
	262	.port_bridge_join = dsa_loop_port_bridge_join,
	263	.port_bridge_leave = dsa_loop_port_bridge_leave,
	264	.port_stp_state_set = dsa_loop_port_stp_state_set,
	265	.port_vlan_filtering = dsa_loop_port_vlan_filtering,
	266	.port_vlan_prepare = dsa_loop_port_vlan_prepare,
	267	.port_vlan_add = dsa_loop_port_vlan_add,
	268	.port_vlan_del = dsa_loop_port_vlan_del,
98cd1552 FF	269	};
	270
	271	static int dsa_loop_drv_probe(struct mdio_device *mdiodev)
	272	{
	273	struct dsa_loop_pdata *pdata = mdiodev->dev.platform_data;
	274	struct dsa_loop_priv *ps;
	275	struct dsa_switch *ds;
	276
	277	if (!pdata)
	278	return -ENODEV;
	279
	280	dev_info(&mdiodev->dev, "%s: 0x%0x\n",
	281	pdata->name, pdata->enabled_ports);
	282
	283	ds = dsa_switch_alloc(&mdiodev->dev, DSA_MAX_PORTS);
	284	if (!ds)
	285	return -ENOMEM;
	286
	287	ps = devm_kzalloc(&mdiodev->dev, sizeof(*ps), GFP_KERNEL);
8ce7aaaa CJ	288	if (!ps)
	289	return -ENOMEM;
	290
98cd1552 FF	291	ps->netdev = dev_get_by_name(&init_net, pdata->netdev);
	292	if (!ps->netdev)
	293	return -EPROBE_DEFER;
	294
	295	pdata->cd.netdev[DSA_LOOP_CPU_PORT] = &ps->netdev->dev;
	296
	297	ds->dev = &mdiodev->dev;
	298	ds->ops = &dsa_loop_driver;
	299	ds->priv = ps;
	300	ps->bus = mdiodev->bus;
	301
	302	dev_set_drvdata(&mdiodev->dev, ds);
	303
23c9ee49	304	return dsa_register_switch(ds);
98cd1552 FF	305	}
	306
	307	static void dsa_loop_drv_remove(struct mdio_device *mdiodev)
	308	{
	309	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);
	310	struct dsa_loop_priv *ps = ds->priv;
	311
	312	dsa_unregister_switch(ds);
	313	dev_put(ps->netdev);
	314	}
	315
	316	static struct mdio_driver dsa_loop_drv = {
	317	.mdiodrv.driver = {
	318	.name = "dsa-loop",
	319	},
	320	.probe = dsa_loop_drv_probe,
	321	.remove = dsa_loop_drv_remove,
	322	};
	323
	324	#define NUM_FIXED_PHYS (DSA_LOOP_NUM_PORTS - 2)
	325
98cd1552 FF	326	static int __init dsa_loop_init(void)
	327	{
	328	struct fixed_phy_status status = {
	329	.link = 1,
	330	.speed = SPEED_100,
	331	.duplex = DUPLEX_FULL,
	332	};
	333	unsigned int i;
	334
	335	for (i = 0; i < NUM_FIXED_PHYS; i++)
	336	phydevs[i] = fixed_phy_register(PHY_POLL, &status, -1, NULL);
	337
	338	return mdio_driver_register(&dsa_loop_drv);
	339	}
	340	module_init(dsa_loop_init);
	341
	342	static void __exit dsa_loop_exit(void)
	343	{
3407dc8e FF	344	unsigned int i;
3407dc8e FF	345
98cd1552	346	mdio_driver_unregister(&dsa_loop_drv);
3407dc8e	347	for (i = 0; i < NUM_FIXED_PHYS; i++)
6d9c153a	348	if (!IS_ERR(phydevs[i]))
3407dc8e	349	fixed_phy_unregister(phydevs[i]);
98cd1552 FF	350	}
	351	module_exit(dsa_loop_exit);
	352
	353	MODULE_LICENSE("GPL");
	354	MODULE_AUTHOR("Florian Fainelli");
	355	MODULE_DESCRIPTION("DSA loopback driver");