dsa: Add mdio device support to Marvell switches

Marvell DSA Switch Device Tree Bindings

---------------------------------------

WARNING: This binding is currently unstable. Do not program it into a

FLASH never to be changed again. Once this binding is stable, this

warning will be removed.

If you need a stable binding, use the old dsa.txt binding.

Marvell Switches are MDIO devices. The following properties should be

placed as a child node of an mdio device.

Required properties:

- compatible           : Should be one of "marvell,mv88e6085",

- reg                  : Address on the MII bus for the switch.

Example:

       mdio {

               #address-cells = <1>;

               #size-cells = <0>;

               switch0: switch@0 {

                       compatible = "marvell,mv88e6085";

                       reg = <0>;

               };

       };

 * Copyright (c) 2015 CMC Electronics, Inc.

 *	Added support for VLAN Table Unit operations

 *

 * Copyright (c) 2016 Andrew Lunn <andrew@lunn.ch>

 *

 * 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

#include <linux/if_bridge.h>

#include <linux/jiffies.h>

#include <linux/list.h>

#include <linux/mdio.h>

#include <linux/module.h>

#include <linux/netdevice.h>

#include <linux/gpio/consumer.h>

	.port_fdb_dump          = mv88e6xxx_port_fdb_dump,

};

static int __init mv88e6xxx_init(void)

int mv88e6xxx_probe(struct mdio_device *mdiodev)

{

	register_switch_driver(&mv88e6xxx_switch_driver);

	struct device *dev = &mdiodev->dev;

	struct mv88e6xxx_priv_state *ps;

	int id, prod_num, rev;

	struct dsa_switch *ds;

	ds = devm_kzalloc(dev, sizeof(*ds) + sizeof(*ps), GFP_KERNEL);

	if (!ds)

		return -ENOMEM;

	ps = (struct mv88e6xxx_priv_state *)(ds + 1);

	ds->priv = ps;

	ps->dev = dev;

	ps->ds = ds;

	ps->bus = mdiodev->bus;

	ps->sw_addr = mdiodev->addr;

	mutex_init(&ps->smi_mutex);

	get_device(&ps->bus->dev);

	ds->drv = &mv88e6xxx_switch_driver;

	id = mv88e6xxx_reg_read(ps, REG_PORT(0), PORT_SWITCH_ID);

	if (id < 0)

		return id;

	prod_num = (id & 0xfff0) >> 4;

	rev = id & 0x000f;

	ps->info = mv88e6xxx_lookup_info(prod_num, mv88e6xxx_table,

					 ARRAY_SIZE(mv88e6xxx_table));

	if (!ps->info)

		return -ENODEV;

	dev_set_drvdata(dev, ds);

	dev_info(dev, "switch 0x%x probed: %s, revision %u\n",

		 prod_num, ps->info->name, rev);

	return 0;

}

static void mv88e6xxx_remove(struct mdio_device *mdiodev)

{

	struct dsa_switch *ds = dev_get_drvdata(&mdiodev->dev);

	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);

	put_device(&ps->bus->dev);

}

static const struct of_device_id mv88e6xxx_of_match[] = {

	{ .compatible = "marvell,mv88e6085" },

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(of, mv88e6xxx_of_match);

static struct mdio_driver mv88e6xxx_driver = {

	.probe	= mv88e6xxx_probe,

	.remove = mv88e6xxx_remove,

	.mdiodrv.driver = {

		.name = "mv88e6085",

		.of_match_table = mv88e6xxx_of_match,

	},

};

static int __init mv88e6xxx_init(void)

{

	register_switch_driver(&mv88e6xxx_switch_driver);

	return mdio_driver_register(&mv88e6xxx_driver);

}

module_init(mv88e6xxx_init);

static void __exit mv88e6xxx_cleanup(void)

{

	mdio_driver_unregister(&mv88e6xxx_driver);

	unregister_switch_driver(&mv88e6xxx_switch_driver);

}

module_exit(mv88e6xxx_cleanup);

MODULE_ALIAS("platform:mv88e6085");

MODULE_ALIAS("platform:mv88e6095");

MODULE_ALIAS("platform:mv88e6095f");

MODULE_ALIAS("platform:mv88e6123");

MODULE_ALIAS("platform:mv88e6131");

MODULE_ALIAS("platform:mv88e6161");

MODULE_ALIAS("platform:mv88e6165");

MODULE_ALIAS("platform:mv88e6171");

MODULE_ALIAS("platform:mv88e6172");

MODULE_ALIAS("platform:mv88e6175");

MODULE_ALIAS("platform:mv88e6176");

MODULE_ALIAS("platform:mv88e6320");

MODULE_ALIAS("platform:mv88e6321");

MODULE_ALIAS("platform:mv88e6350");

MODULE_ALIAS("platform:mv88e6351");

MODULE_ALIAS("platform:mv88e6352");

MODULE_AUTHOR("Lennert Buytenhek <buytenh@wantstofly.org>");

MODULE_DESCRIPTION("Driver for Marvell 88E6XXX ethernet switch chips");

MODULE_LICENSE("GPL");