[net-next-2.6.git] / drivers / net / fs_enet / mii-bitbang.c

/*
 * Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
 *
 * Copyright (c) 2003 Intracom S.A.
 *  by Pantelis Antoniou <panto@intracom.gr>
 *
 * 2005 (c) MontaVista Software, Inc.
 * Vitaly Bordug <vbordug@ru.mvista.com>
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of any
 * kind, whether express or implied.
 */

#include <linux/module.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/mii.h>
#include <linux/platform_device.h>
#include <linux/mdio-bitbang.h>

#ifdef CONFIG_PPC_CPM_NEW_BINDING
#include <linux/of_platform.h>
#endif

#include "fs_enet.h"

struct bb_info {
	struct mdiobb_ctrl ctrl;
	__be32 __iomem *dir;
	__be32 __iomem *dat;
	u32 mdio_msk;
	u32 mdc_msk;
};

/* FIXME: If any other users of GPIO crop up, then these will have to
 * have some sort of global synchronization to avoid races with other
 * pins on the same port.  The ideal solution would probably be to
 * bind the ports to a GPIO driver, and have this be a client of it.
 */
static inline void bb_set(u32 __iomem *p, u32 m)
{
	out_be32(p, in_be32(p) | m);
}

static inline void bb_clr(u32 __iomem *p, u32 m)
{
	out_be32(p, in_be32(p) & ~m);
}

static inline int bb_read(u32 __iomem *p, u32 m)
{
	return (in_be32(p) & m) != 0;
}

static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
{
	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);

	if (dir)
		bb_set(bitbang->dir, bitbang->mdio_msk);
	else
		bb_clr(bitbang->dir, bitbang->mdio_msk);

	/* Read back to flush the write. */
	in_be32(bitbang->dir);
}

static inline int mdio_read(struct mdiobb_ctrl *ctrl)
{
	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
	return bb_read(bitbang->dat, bitbang->mdio_msk);
}

static inline void mdio(struct mdiobb_ctrl *ctrl, int what)
{
	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);

	if (what)
		bb_set(bitbang->dat, bitbang->mdio_msk);
	else
		bb_clr(bitbang->dat, bitbang->mdio_msk);

	/* Read back to flush the write. */
	in_be32(bitbang->dat);
}

static inline void mdc(struct mdiobb_ctrl *ctrl, int what)
{
	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);

	if (what)
		bb_set(bitbang->dat, bitbang->mdc_msk);
	else
		bb_clr(bitbang->dat, bitbang->mdc_msk);

	/* Read back to flush the write. */
	in_be32(bitbang->dat);
}

static struct mdiobb_ops bb_ops = {
	.owner = THIS_MODULE,
	.set_mdc = mdc,
	.set_mdio_dir = mdio_dir,
	.set_mdio_data = mdio,
	.get_mdio_data = mdio_read,
};

#ifdef CONFIG_PPC_CPM_NEW_BINDING
static int __devinit fs_mii_bitbang_init(struct mii_bus *bus,
                                         struct device_node *np)
{
	struct resource res;
	const u32 *data;
	int mdio_pin, mdc_pin, len;
	struct bb_info *bitbang = bus->priv;

	int ret = of_address_to_resource(np, 0, &res);
	if (ret)
		return ret;

	if (res.end - res.start < 13)
		return -ENODEV;

	/* This should really encode the pin number as well, but all
	 * we get is an int, and the odds of multiple bitbang mdio buses
	 * is low enough that it's not worth going too crazy.
	 */
	bus->id = res.start;

	data = of_get_property(np, "fsl,mdio-pin", &len);
	if (!data || len != 4)
		return -ENODEV;
	mdio_pin = *data;

	data = of_get_property(np, "fsl,mdc-pin", &len);
	if (!data || len != 4)
		return -ENODEV;
	mdc_pin = *data;

	bitbang->dir = ioremap(res.start, res.end - res.start + 1);
	if (!bitbang->dir)
		return -ENOMEM;

	bitbang->dat = bitbang->dir + 4;
	bitbang->mdio_msk = 1 << (31 - mdio_pin);
	bitbang->mdc_msk = 1 << (31 - mdc_pin);

	return 0;
}

static void __devinit add_phy(struct mii_bus *bus, struct device_node *np)
{
	const u32 *data;
	int len, id, irq;

	data = of_get_property(np, "reg", &len);
	if (!data || len != 4)
		return;

	id = *data;
	bus->phy_mask &= ~(1 << id);

	irq = of_irq_to_resource(np, 0, NULL);
	if (irq != NO_IRQ)
		bus->irq[id] = irq;
}

static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
                                        const struct of_device_id *match)
{
	struct device_node *np = NULL;
	struct mii_bus *new_bus;
	struct bb_info *bitbang;
	int ret = -ENOMEM;
	int i;

	bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
	if (!bitbang)
		goto out;

	bitbang->ctrl.ops = &bb_ops;

	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
	if (!new_bus)
		goto out_free_priv;

	new_bus->name = "CPM2 Bitbanged MII",

	ret = fs_mii_bitbang_init(new_bus, ofdev->node);
	if (ret)
		goto out_free_bus;

	new_bus->phy_mask = ~0;
	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	if (!new_bus->irq)
		goto out_unmap_regs;

	for (i = 0; i < PHY_MAX_ADDR; i++)
		new_bus->irq[i] = -1;

	while ((np = of_get_next_child(ofdev->node, np)))
		if (!strcmp(np->type, "ethernet-phy"))
			add_phy(new_bus, np);

	new_bus->dev = &ofdev->dev;
	dev_set_drvdata(&ofdev->dev, new_bus);

	ret = mdiobus_register(new_bus);
	if (ret)
		goto out_free_irqs;

	return 0;

out_free_irqs:
	dev_set_drvdata(&ofdev->dev, NULL);
	kfree(new_bus->irq);
out_unmap_regs:
	iounmap(bitbang->dir);
out_free_bus:
	kfree(new_bus);
out_free_priv:
	free_mdio_bitbang(new_bus);
out:
	return ret;
}

static int fs_enet_mdio_remove(struct of_device *ofdev)
{
	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
	struct bb_info *bitbang = bus->priv;

	mdiobus_unregister(bus);
	free_mdio_bitbang(bus);
	dev_set_drvdata(&ofdev->dev, NULL);
	kfree(bus->irq);
	iounmap(bitbang->dir);
	kfree(bitbang);
	kfree(bus);

	return 0;
}

static struct of_device_id fs_enet_mdio_bb_match[] = {
	{
		.compatible = "fsl,cpm2-mdio-bitbang",
	},
	{},
};

static struct of_platform_driver fs_enet_bb_mdio_driver = {
	.name = "fsl-bb-mdio",
	.match_table = fs_enet_mdio_bb_match,
	.probe = fs_enet_mdio_probe,
	.remove = fs_enet_mdio_remove,
};

static int fs_enet_mdio_bb_init(void)
{
	return of_register_platform_driver(&fs_enet_bb_mdio_driver);
}

static void fs_enet_mdio_bb_exit(void)
{
	of_unregister_platform_driver(&fs_enet_bb_mdio_driver);
}

module_init(fs_enet_mdio_bb_init);
module_exit(fs_enet_mdio_bb_exit);
#else
static int __devinit fs_mii_bitbang_init(struct bb_info *bitbang,
                                         struct fs_mii_bb_platform_info *fmpi)
{
	bitbang->dir = (u32 __iomem *)fmpi->mdio_dir.offset;
	bitbang->dat = (u32 __iomem *)fmpi->mdio_dat.offset;
	bitbang->mdio_msk = 1U << (31 - fmpi->mdio_dat.bit);
	bitbang->mdc_msk = 1U << (31 - fmpi->mdc_dat.bit);

	return 0;
}

static int __devinit fs_enet_mdio_probe(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct fs_mii_bb_platform_info *pdata;
	struct mii_bus *new_bus;
	struct bb_info *bitbang;
	int err = 0;

	if (NULL == dev)
		return -EINVAL;

	bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);

	if (NULL == bitbang)
		return -ENOMEM;

	bitbang->ctrl.ops = &bb_ops;

	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);

	if (NULL == new_bus)
		return -ENOMEM;

	new_bus->name = "BB MII Bus",
	new_bus->id = pdev->id;

	new_bus->phy_mask = ~0x9;
	pdata = (struct fs_mii_bb_platform_info *)pdev->dev.platform_data;

	if (NULL == pdata) {
		printk(KERN_ERR "gfar mdio %d: Missing platform data!\n", pdev->id);
		return -ENODEV;
	}

	/*set up workspace*/
	fs_mii_bitbang_init(bitbang, pdata);

	new_bus->priv = bitbang;

	new_bus->irq = pdata->irq;

	new_bus->dev = dev;
	dev_set_drvdata(dev, new_bus);

	err = mdiobus_register(new_bus);

	if (0 != err) {
		printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
				new_bus->name);
		goto bus_register_fail;
	}

	return 0;

bus_register_fail:
	free_mdio_bitbang(new_bus);
	kfree(bitbang);

	return err;
}

static int fs_enet_mdio_remove(struct device *dev)
{
	struct mii_bus *bus = dev_get_drvdata(dev);

	mdiobus_unregister(bus);

	dev_set_drvdata(dev, NULL);

	free_mdio_bitbang(bus);

	return 0;
}

static struct device_driver fs_enet_bb_mdio_driver = {
	.name = "fsl-bb-mdio",
	.bus = &platform_bus_type,
	.probe = fs_enet_mdio_probe,
	.remove = fs_enet_mdio_remove,
};

int fs_enet_mdio_bb_init(void)
{
	return driver_register(&fs_enet_bb_mdio_driver);
}

void fs_enet_mdio_bb_exit(void)
{
	driver_unregister(&fs_enet_bb_mdio_driver);
}
#endif
Commit	Line	Data
48257c4f PA	1	/*
	2	* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
	3	*
9b8ee8e7	4	* Copyright (c) 2003 Intracom S.A.
48257c4f	5	* by Pantelis Antoniou <panto@intracom.gr>
9b8ee8e7 VB	6	*
9b8ee8e7 VB	7	* 2005 (c) MontaVista Software, Inc.
48257c4f PA	8	* Vitaly Bordug <vbordug@ru.mvista.com>
48257c4f PA	9	*
9b8ee8e7 VB	10	* This file is licensed under the terms of the GNU General Public License
9b8ee8e7 VB	11	* version 2. This program is licensed "as is" without any warranty of any
48257c4f PA	12	* kind, whether express or implied.
	13	*/
	14
48257c4f	15	#include <linux/module.h>
48257c4f PA	16	#include <linux/ioport.h>
48257c4f PA	17	#include <linux/slab.h>
48257c4f	18	#include <linux/init.h>
2b5b3a60	19	#include <linux/interrupt.h>
48257c4f PA	20	#include <linux/netdevice.h>
48257c4f PA	21	#include <linux/etherdevice.h>
48257c4f	22	#include <linux/mii.h>
5b4b8454	23	#include <linux/platform_device.h>
2b5b3a60	24	#include <linux/mdio-bitbang.h>
48257c4f	25
976de6a8 SW	26	#ifdef CONFIG_PPC_CPM_NEW_BINDING
	27	#include <linux/of_platform.h>
	28	#endif
48257c4f PA	29
	30	#include "fs_enet.h"
	31
976de6a8	32	struct bb_info {
2b5b3a60	33	struct mdiobb_ctrl ctrl;
976de6a8 SW	34	__be32 __iomem *dir;
	35	__be32 __iomem *dat;
	36	u32 mdio_msk;
	37	u32 mdc_msk;
976de6a8 SW	38	};
	39
	40	/* FIXME: If any other users of GPIO crop up, then these will have to
	41	* have some sort of global synchronization to avoid races with other
	42	* pins on the same port. The ideal solution would probably be to
	43	* bind the ports to a GPIO driver, and have this be a client of it.
	44	*/
	45	static inline void bb_set(u32 __iomem *p, u32 m)
48257c4f	46	{
976de6a8	47	out_be32(p, in_be32(p) \| m);
48257c4f PA	48	}
48257c4f PA	49
976de6a8	50	static inline void bb_clr(u32 __iomem *p, u32 m)
48257c4f	51	{
976de6a8	52	out_be32(p, in_be32(p) & ~m);
48257c4f PA	53	}
48257c4f PA	54
976de6a8	55	static inline int bb_read(u32 __iomem *p, u32 m)
48257c4f	56	{
976de6a8	57	return (in_be32(p) & m) != 0;
48257c4f PA	58	}
48257c4f PA	59
2b5b3a60	60	static inline void mdio_dir(struct mdiobb_ctrl *ctrl, int dir)
48257c4f	61	{
2b5b3a60	62	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
48257c4f	63
2b5b3a60 SW	64	if (dir)
	65	bb_set(bitbang->dir, bitbang->mdio_msk);
	66	else
	67	bb_clr(bitbang->dir, bitbang->mdio_msk);
	68
	69	/* Read back to flush the write. */
	70	in_be32(bitbang->dir);
48257c4f PA	71	}
48257c4f PA	72
2b5b3a60	73	static inline int mdio_read(struct mdiobb_ctrl *ctrl)
48257c4f	74	{
2b5b3a60	75	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
976de6a8	76	return bb_read(bitbang->dat, bitbang->mdio_msk);
48257c4f PA	77	}
48257c4f PA	78
2b5b3a60	79	static inline void mdio(struct mdiobb_ctrl *ctrl, int what)
48257c4f	80	{
2b5b3a60 SW	81	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
2b5b3a60 SW	82
48257c4f	83	if (what)
976de6a8	84	bb_set(bitbang->dat, bitbang->mdio_msk);
48257c4f	85	else
976de6a8	86	bb_clr(bitbang->dat, bitbang->mdio_msk);
2b5b3a60 SW	87
	88	/* Read back to flush the write. */
	89	in_be32(bitbang->dat);
48257c4f PA	90	}
48257c4f PA	91
2b5b3a60	92	static inline void mdc(struct mdiobb_ctrl *ctrl, int what)
48257c4f	93	{
2b5b3a60 SW	94	struct bb_info *bitbang = container_of(ctrl, struct bb_info, ctrl);
2b5b3a60 SW	95
48257c4f	96	if (what)
976de6a8	97	bb_set(bitbang->dat, bitbang->mdc_msk);
48257c4f	98	else
976de6a8	99	bb_clr(bitbang->dat, bitbang->mdc_msk);
48257c4f	100
2b5b3a60 SW	101	/* Read back to flush the write. */
2b5b3a60 SW	102	in_be32(bitbang->dat);
48257c4f PA	103	}
48257c4f PA	104
2b5b3a60 SW	105	static struct mdiobb_ops bb_ops = {
	106	.owner = THIS_MODULE,
	107	.set_mdc = mdc,
	108	.set_mdio_dir = mdio_dir,
	109	.set_mdio_data = mdio,
	110	.get_mdio_data = mdio_read,
	111	};
5b4b8454	112
976de6a8 SW	113	#ifdef CONFIG_PPC_CPM_NEW_BINDING
	114	static int __devinit fs_mii_bitbang_init(struct mii_bus *bus,
	115	struct device_node *np)
48257c4f	116	{
976de6a8 SW	117	struct resource res;
	118	const u32 *data;
	119	int mdio_pin, mdc_pin, len;
	120	struct bb_info *bitbang = bus->priv;
48257c4f	121
976de6a8 SW	122	int ret = of_address_to_resource(np, 0, &res);
	123	if (ret)
	124	return ret;
	125
	126	if (res.end - res.start < 13)
	127	return -ENODEV;
	128
	129	/* This should really encode the pin number as well, but all
	130	* we get is an int, and the odds of multiple bitbang mdio buses
	131	* is low enough that it's not worth going too crazy.
	132	*/
	133	bus->id = res.start;
	134
	135	data = of_get_property(np, "fsl,mdio-pin", &len);
	136	if (!data \|\| len != 4)
	137	return -ENODEV;
	138	mdio_pin = *data;
	139
	140	data = of_get_property(np, "fsl,mdc-pin", &len);
	141	if (!data \|\| len != 4)
	142	return -ENODEV;
	143	mdc_pin = *data;
	144
	145	bitbang->dir = ioremap(res.start, res.end - res.start + 1);
	146	if (!bitbang->dir)
	147	return -ENOMEM;
	148
	149	bitbang->dat = bitbang->dir + 4;
	150	bitbang->mdio_msk = 1 << (31 - mdio_pin);
	151	bitbang->mdc_msk = 1 << (31 - mdc_pin);
976de6a8 SW	152
	153	return 0;
	154	}
	155
	156	static void __devinit add_phy(struct mii_bus bus, struct device_node np)
	157	{
	158	const u32 *data;
	159	int len, id, irq;
	160
	161	data = of_get_property(np, "reg", &len);
	162	if (!data \|\| len != 4)
	163	return;
	164
	165	id = *data;
	166	bus->phy_mask &= ~(1 << id);
5b4b8454	167
976de6a8 SW	168	irq = of_irq_to_resource(np, 0, NULL);
	169	if (irq != NO_IRQ)
	170	bus->irq[id] = irq;
	171	}
	172
	173	static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
	174	const struct of_device_id *match)
	175	{
	176	struct device_node *np = NULL;
	177	struct mii_bus *new_bus;
	178	struct bb_info *bitbang;
	179	int ret = -ENOMEM;
	180	int i;
	181
976de6a8 SW	182	bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
976de6a8 SW	183	if (!bitbang)
2b5b3a60 SW	184	goto out;
	185
	186	bitbang->ctrl.ops = &bb_ops;
	187
	188	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
	189	if (!new_bus)
	190	goto out_free_priv;
976de6a8	191
976de6a8	192	new_bus->name = "CPM2 Bitbanged MII",
976de6a8 SW	193
	194	ret = fs_mii_bitbang_init(new_bus, ofdev->node);
	195	if (ret)
2b5b3a60	196	goto out_free_bus;
976de6a8 SW	197
	198	new_bus->phy_mask = ~0;
	199	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	200	if (!new_bus->irq)
	201	goto out_unmap_regs;
	202
	203	for (i = 0; i < PHY_MAX_ADDR; i++)
	204	new_bus->irq[i] = -1;
	205
	206	while ((np = of_get_next_child(ofdev->node, np)))
	207	if (!strcmp(np->type, "ethernet-phy"))
	208	add_phy(new_bus, np);
	209
	210	new_bus->dev = &ofdev->dev;
	211	dev_set_drvdata(&ofdev->dev, new_bus);
	212
	213	ret = mdiobus_register(new_bus);
	214	if (ret)
	215	goto out_free_irqs;
	216
	217	return 0;
	218
	219	out_free_irqs:
	220	dev_set_drvdata(&ofdev->dev, NULL);
	221	kfree(new_bus->irq);
	222	out_unmap_regs:
	223	iounmap(bitbang->dir);
976de6a8 SW	224	out_free_bus:
976de6a8 SW	225	kfree(new_bus);
2b5b3a60 SW	226	out_free_priv:
2b5b3a60 SW	227	free_mdio_bitbang(new_bus);
976de6a8 SW	228	out:
	229	return ret;
	230	}
	231
	232	static int fs_enet_mdio_remove(struct of_device *ofdev)
	233	{
	234	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
	235	struct bb_info *bitbang = bus->priv;
	236
	237	mdiobus_unregister(bus);
2b5b3a60	238	free_mdio_bitbang(bus);
976de6a8 SW	239	dev_set_drvdata(&ofdev->dev, NULL);
	240	kfree(bus->irq);
	241	iounmap(bitbang->dir);
	242	kfree(bitbang);
	243	kfree(bus);
	244
	245	return 0;
	246	}
	247
	248	static struct of_device_id fs_enet_mdio_bb_match[] = {
	249	{
	250	.compatible = "fsl,cpm2-mdio-bitbang",
	251	},
	252	{},
	253	};
	254
	255	static struct of_platform_driver fs_enet_bb_mdio_driver = {
	256	.name = "fsl-bb-mdio",
	257	.match_table = fs_enet_mdio_bb_match,
	258	.probe = fs_enet_mdio_probe,
	259	.remove = fs_enet_mdio_remove,
	260	};
	261
2b5b3a60	262	static int fs_enet_mdio_bb_init(void)
976de6a8 SW	263	{
	264	return of_register_platform_driver(&fs_enet_bb_mdio_driver);
	265	}
	266
2b5b3a60	267	static void fs_enet_mdio_bb_exit(void)
976de6a8 SW	268	{
	269	of_unregister_platform_driver(&fs_enet_bb_mdio_driver);
	270	}
	271
	272	module_init(fs_enet_mdio_bb_init);
	273	module_exit(fs_enet_mdio_bb_exit);
	274	#else
	275	static int __devinit fs_mii_bitbang_init(struct bb_info *bitbang,
	276	struct fs_mii_bb_platform_info *fmpi)
	277	{
	278	bitbang->dir = (u32 __iomem *)fmpi->mdio_dir.offset;
	279	bitbang->dat = (u32 __iomem *)fmpi->mdio_dat.offset;
	280	bitbang->mdio_msk = 1U << (31 - fmpi->mdio_dat.bit);
	281	bitbang->mdc_msk = 1U << (31 - fmpi->mdc_dat.bit);
48257c4f PA	282
	283	return 0;
	284	}
5b4b8454	285
5b4b8454 VB	286	static int __devinit fs_enet_mdio_probe(struct device *dev)
	287	{
	288	struct platform_device *pdev = to_platform_device(dev);
	289	struct fs_mii_bb_platform_info *pdata;
	290	struct mii_bus *new_bus;
	291	struct bb_info *bitbang;
	292	int err = 0;
	293
	294	if (NULL == dev)
	295	return -EINVAL;
	296
2b5b3a60	297	bitbang = kzalloc(sizeof(struct bb_info), GFP_KERNEL);
5b4b8454	298
2b5b3a60	299	if (NULL == bitbang)
5b4b8454 VB	300	return -ENOMEM;
5b4b8454 VB	301
2b5b3a60	302	bitbang->ctrl.ops = &bb_ops;
5b4b8454	303
2b5b3a60 SW	304	new_bus = alloc_mdio_bitbang(&bitbang->ctrl);
	305
	306	if (NULL == new_bus)
5b4b8454 VB	307	return -ENOMEM;
	308
	309	new_bus->name = "BB MII Bus",
5b4b8454 VB	310	new_bus->id = pdev->id;
	311
	312	new_bus->phy_mask = ~0x9;
	313	pdata = (struct fs_mii_bb_platform_info *)pdev->dev.platform_data;
	314
	315	if (NULL == pdata) {
	316	printk(KERN_ERR "gfar mdio %d: Missing platform data!\n", pdev->id);
	317	return -ENODEV;
	318	}
	319
	320	/set up workspace/
	321	fs_mii_bitbang_init(bitbang, pdata);
	322
	323	new_bus->priv = bitbang;
	324
	325	new_bus->irq = pdata->irq;
	326
	327	new_bus->dev = dev;
	328	dev_set_drvdata(dev, new_bus);
	329
	330	err = mdiobus_register(new_bus);
	331
	332	if (0 != err) {
	333	printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
	334	new_bus->name);
	335	goto bus_register_fail;
	336	}
	337
	338	return 0;
	339
	340	bus_register_fail:
2b5b3a60	341	free_mdio_bitbang(new_bus);
5b4b8454	342	kfree(bitbang);
5b4b8454 VB	343
	344	return err;
	345	}
	346
5b4b8454 VB	347	static int fs_enet_mdio_remove(struct device *dev)
	348	{
	349	struct mii_bus *bus = dev_get_drvdata(dev);
	350
	351	mdiobus_unregister(bus);
	352
	353	dev_set_drvdata(dev, NULL);
	354
2b5b3a60	355	free_mdio_bitbang(bus);
5b4b8454 VB	356
	357	return 0;
	358	}
	359
	360	static struct device_driver fs_enet_bb_mdio_driver = {
	361	.name = "fsl-bb-mdio",
	362	.bus = &platform_bus_type,
	363	.probe = fs_enet_mdio_probe,
	364	.remove = fs_enet_mdio_remove,
	365	};
	366
	367	int fs_enet_mdio_bb_init(void)
	368	{
	369	return driver_register(&fs_enet_bb_mdio_driver);
	370	}
	371
	372	void fs_enet_mdio_bb_exit(void)
	373	{
	374	driver_unregister(&fs_enet_bb_mdio_driver);
	375	}
2b5b3a60	376	#endif