[mirror_ubuntu-bionic-kernel.git] / drivers / net / fs_enet / mii-fec.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/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>

#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

#include "fs_enet.h"
#include "fec.h"

/* Make MII read/write commands for the FEC.
*/
#define mk_mii_read(REG)	(0x60020000 | ((REG & 0x1f) << 18))
#define mk_mii_write(REG, VAL)	(0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
#define mk_mii_end		0

#define FEC_MII_LOOPS	10000

static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
{
	struct fec_info* fec = bus->priv;
	fec_t __iomem *fecp = fec->fecp;
	int i, ret = -1;

	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
		BUG();

	/* Add PHY address to register command.  */
	out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));

	for (i = 0; i < FEC_MII_LOOPS; i++)
		if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
			break;

	if (i < FEC_MII_LOOPS) {
		out_be32(&fecp->fec_ievent, FEC_ENET_MII);
		ret = in_be32(&fecp->fec_mii_data) & 0xffff;
	}

	return ret;
}

static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
{
	struct fec_info* fec = bus->priv;
	fec_t __iomem *fecp = fec->fecp;
	int i;

	/* this must never happen */
	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
		BUG();

	/* Add PHY address to register command.  */
	out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));

	for (i = 0; i < FEC_MII_LOOPS; i++)
		if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
			break;

	if (i < FEC_MII_LOOPS)
		out_be32(&fecp->fec_ievent, FEC_ENET_MII);

	return 0;

}

static int fs_enet_fec_mii_reset(struct mii_bus *bus)
{
	/* nothing here - for now */
	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 resource res;
	struct mii_bus *new_bus;
	struct fec_info *fec;
	int ret = -ENOMEM, i;

	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
	if (!new_bus)
		goto out;

	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
	if (!fec)
		goto out_mii;

	new_bus->priv = fec;
	new_bus->name = "FEC MII Bus";
	new_bus->read = &fs_enet_fec_mii_read;
	new_bus->write = &fs_enet_fec_mii_write;
	new_bus->reset = &fs_enet_fec_mii_reset;

	ret = of_address_to_resource(ofdev->node, 0, &res);
	if (ret)
		goto out_res;

	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);

	fec->fecp = ioremap(res.start, res.end - res.start + 1);
	if (!fec->fecp)
		goto out_fec;

	fec->mii_speed = ((ppc_proc_freq + 4999999) / 5000000) << 1;

	setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
	setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX |
	                                  FEC_ECNTRL_ETHER_EN);
	out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
	out_be32(&fec->fecp->fec_mii_speed, fec->mii_speed);

	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->parent = &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(fec->fecp);
out_res:
out_fec:
	kfree(fec);
out_mii:
	kfree(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 fec_info *fec = bus->priv;

	mdiobus_unregister(bus);
	dev_set_drvdata(&ofdev->dev, NULL);
	kfree(bus->irq);
	iounmap(fec->fecp);
	kfree(fec);
	kfree(bus);

	return 0;
}

static struct of_device_id fs_enet_mdio_fec_match[] = {
	{
		.compatible = "fsl,pq1-fec-mdio",
	},
	{},
};

static struct of_platform_driver fs_enet_fec_mdio_driver = {
	.name = "fsl-fec-mdio",
	.match_table = fs_enet_mdio_fec_match,
	.probe = fs_enet_mdio_probe,
	.remove = fs_enet_mdio_remove,
};

static int fs_enet_mdio_fec_init(void)
{
	return of_register_platform_driver(&fs_enet_fec_mdio_driver);
}

static void fs_enet_mdio_fec_exit(void)
{
	of_unregister_platform_driver(&fs_enet_fec_mdio_driver);
}

module_init(fs_enet_mdio_fec_init);
module_exit(fs_enet_mdio_fec_exit);
Commit	Line	Data
5b4b8454 VB	1	/*
	2	* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
	3	*
	4	* Copyright (c) 2003 Intracom S.A.
	5	* by Pantelis Antoniou <panto@intracom.gr>
	6	*
	7	* 2005 (c) MontaVista Software, Inc.
	8	* Vitaly Bordug <vbordug@ru.mvista.com>
	9	*
	10	* This file is licensed under the terms of the GNU General Public License
	11	* version 2. This program is licensed "as is" without any warranty of any
	12	* kind, whether express or implied.
	13	*/
	14
5b4b8454 VB	15	#include <linux/module.h>
	16	#include <linux/types.h>
	17	#include <linux/kernel.h>
5b4b8454 VB	18	#include <linux/string.h>
	19	#include <linux/ptrace.h>
	20	#include <linux/errno.h>
	21	#include <linux/ioport.h>
	22	#include <linux/slab.h>
	23	#include <linux/interrupt.h>
5b4b8454 VB	24	#include <linux/init.h>
	25	#include <linux/delay.h>
	26	#include <linux/netdevice.h>
	27	#include <linux/etherdevice.h>
	28	#include <linux/skbuff.h>
	29	#include <linux/spinlock.h>
	30	#include <linux/mii.h>
	31	#include <linux/ethtool.h>
	32	#include <linux/bitops.h>
	33	#include <linux/platform_device.h>
b219108c	34	#include <linux/of_platform.h>
5b4b8454 VB	35
	36	#include <asm/pgtable.h>
	37	#include <asm/irq.h>
	38	#include <asm/uaccess.h>
	39
	40	#include "fs_enet.h"
	41	#include "fec.h"
	42
	43	/* Make MII read/write commands for the FEC.
	44	*/
	45	#define mk_mii_read(REG) (0x60020000 \| ((REG & 0x1f) << 18))
	46	#define mk_mii_write(REG, VAL) (0x50020000 \| ((REG & 0x1f) << 18) \| (VAL & 0xffff))
	47	#define mk_mii_end 0
	48
	49	#define FEC_MII_LOOPS 10000
	50
5b4b8454 VB	51	static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
	52	{
	53	struct fec_info* fec = bus->priv;
31a5bb04	54	fec_t __iomem *fecp = fec->fecp;
5b4b8454 VB	55	int i, ret = -1;
	56
	57	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
	58	BUG();
	59
	60	/* Add PHY address to register command. */
	61	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_read(location));
	62
	63	for (i = 0; i < FEC_MII_LOOPS; i++)
	64	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
	65	break;
	66
	67	if (i < FEC_MII_LOOPS) {
	68	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
	69	ret = in_be32(&fecp->fec_mii_data) & 0xffff;
	70	}
	71
	72	return ret;
5b4b8454 VB	73	}
	74
	75	static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
	76	{
	77	struct fec_info* fec = bus->priv;
31a5bb04	78	fec_t __iomem *fecp = fec->fecp;
5b4b8454 VB	79	int i;
	80
	81	/* this must never happen */
	82	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
	83	BUG();
	84
	85	/* Add PHY address to register command. */
	86	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_write(location, val));
	87
	88	for (i = 0; i < FEC_MII_LOOPS; i++)
	89	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
	90	break;
	91
	92	if (i < FEC_MII_LOOPS)
	93	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
	94
	95	return 0;
	96
	97	}
	98
	99	static int fs_enet_fec_mii_reset(struct mii_bus *bus)
	100	{
	101	/* nothing here - for now */
	102	return 0;
	103	}
	104
976de6a8 SW	105	static void __devinit add_phy(struct mii_bus bus, struct device_node np)
	106	{
	107	const u32 *data;
	108	int len, id, irq;
	109
	110	data = of_get_property(np, "reg", &len);
	111	if (!data \|\| len != 4)
	112	return;
	113
	114	id = *data;
	115	bus->phy_mask &= ~(1 << id);
	116
	117	irq = of_irq_to_resource(np, 0, NULL);
	118	if (irq != NO_IRQ)
	119	bus->irq[id] = irq;
	120	}
	121
	122	static int __devinit fs_enet_mdio_probe(struct of_device *ofdev,
	123	const struct of_device_id *match)
	124	{
	125	struct device_node *np = NULL;
	126	struct resource res;
	127	struct mii_bus *new_bus;
	128	struct fec_info *fec;
	129	int ret = -ENOMEM, i;
	130
	131	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
	132	if (!new_bus)
	133	goto out;
	134
	135	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
	136	if (!fec)
	137	goto out_mii;
	138
	139	new_bus->priv = fec;
	140	new_bus->name = "FEC MII Bus";
	141	new_bus->read = &fs_enet_fec_mii_read;
	142	new_bus->write = &fs_enet_fec_mii_write;
	143	new_bus->reset = &fs_enet_fec_mii_reset;
	144
	145	ret = of_address_to_resource(ofdev->node, 0, &res);
	146	if (ret)
a86e2cbe	147	goto out_res;
976de6a8	148
9d9326d3	149	snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);
976de6a8 SW	150
	151	fec->fecp = ioremap(res.start, res.end - res.start + 1);
	152	if (!fec->fecp)
	153	goto out_fec;
	154
	155	fec->mii_speed = ((ppc_proc_freq + 4999999) / 5000000) << 1;
	156
	157	setbits32(&fec->fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE);
	158	setbits32(&fec->fecp->fec_ecntrl, FEC_ECNTRL_PINMUX \|
	159	FEC_ECNTRL_ETHER_EN);
	160	out_be32(&fec->fecp->fec_ievent, FEC_ENET_MII);
	161	out_be32(&fec->fecp->fec_mii_speed, fec->mii_speed);
	162
	163	new_bus->phy_mask = ~0;
	164	new_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
	165	if (!new_bus->irq)
	166	goto out_unmap_regs;
	167
	168	for (i = 0; i < PHY_MAX_ADDR; i++)
	169	new_bus->irq[i] = -1;
	170
	171	while ((np = of_get_next_child(ofdev->node, np)))
	172	if (!strcmp(np->type, "ethernet-phy"))
	173	add_phy(new_bus, np);
	174
18ee49dd	175	new_bus->parent = &ofdev->dev;
976de6a8 SW	176	dev_set_drvdata(&ofdev->dev, new_bus);
	177
	178	ret = mdiobus_register(new_bus);
	179	if (ret)
	180	goto out_free_irqs;
	181
	182	return 0;
	183
	184	out_free_irqs:
	185	dev_set_drvdata(&ofdev->dev, NULL);
	186	kfree(new_bus->irq);
	187	out_unmap_regs:
	188	iounmap(fec->fecp);
a86e2cbe	189	out_res:
976de6a8 SW	190	out_fec:
	191	kfree(fec);
	192	out_mii:
	193	kfree(new_bus);
	194	out:
	195	return ret;
	196	}
	197
	198	static int fs_enet_mdio_remove(struct of_device *ofdev)
	199	{
	200	struct mii_bus *bus = dev_get_drvdata(&ofdev->dev);
	201	struct fec_info *fec = bus->priv;
	202
	203	mdiobus_unregister(bus);
	204	dev_set_drvdata(&ofdev->dev, NULL);
	205	kfree(bus->irq);
	206	iounmap(fec->fecp);
	207	kfree(fec);
	208	kfree(bus);
	209
	210	return 0;
	211	}
	212
	213	static struct of_device_id fs_enet_mdio_fec_match[] = {
	214	{
	215	.compatible = "fsl,pq1-fec-mdio",
	216	},
	217	{},
	218	};
	219
	220	static struct of_platform_driver fs_enet_fec_mdio_driver = {
	221	.name = "fsl-fec-mdio",
	222	.match_table = fs_enet_mdio_fec_match,
	223	.probe = fs_enet_mdio_probe,
	224	.remove = fs_enet_mdio_remove,
	225	};
	226
	227	static int fs_enet_mdio_fec_init(void)
	228	{
	229	return of_register_platform_driver(&fs_enet_fec_mdio_driver);
	230	}
	231
	232	static void fs_enet_mdio_fec_exit(void)
	233	{
	234	of_unregister_platform_driver(&fs_enet_fec_mdio_driver);
	235	}
	236
	237	module_init(fs_enet_mdio_fec_init);
	238	module_exit(fs_enet_mdio_fec_exit);