[net-next-2.6.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/pci.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 <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 match_has_phy (struct device *dev, void* data)
{
	struct platform_device* pdev = container_of(dev, struct platform_device, dev);
	struct fs_platform_info* fpi;
	if(strcmp(pdev->name, (char*)data))
	{
	    return 0;
	}

	fpi = pdev->dev.platform_data;
	if((fpi)&&(fpi->has_phy))
		return 1;
	return 0;
}

static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
{
	struct resource *r;
	fec_t *fecp;
	char* name = "fsl-cpm-fec";

	/* we need fec in order to be useful */
	struct platform_device *fec_pdev =
		container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
				struct platform_device, dev);

	if(fec_pdev == NULL) {
		printk(KERN_ERR"Unable to find PHY for %s", name);
		return -ENODEV;
	}

	r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");

	fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t));
	fec->mii_speed = fmpi->mii_speed;

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

	return 0;
}

static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
{
	struct fec_info* fec = bus->priv;
	fec_t *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 *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 int __devinit fs_enet_fec_mdio_probe(struct device *dev)
{
	struct platform_device *pdev = to_platform_device(dev);
	struct fs_mii_fec_platform_info *pdata;
	struct mii_bus *new_bus;
	struct fec_info *fec;
	int err = 0;
	if (NULL == dev)
		return -EINVAL;
	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);

	if (NULL == new_bus)
		return -ENOMEM;

	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);

	if (NULL == fec)
		return -ENOMEM;

	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,
	new_bus->id = pdev->id;

	pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;

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

	/*set up workspace*/

	fs_mii_fec_init(fec, pdata);
	new_bus->priv = fec;

	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:
	kfree(new_bus);

	return err;
}


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

	mdiobus_unregister(bus);

	dev_set_drvdata(dev, NULL);
	kfree(bus->priv);

	bus->priv = NULL;
	kfree(bus);

	return 0;
}

static struct device_driver fs_enet_fec_mdio_driver = {
	.name = "fsl-cpm-fec-mdio",
	.bus = &platform_bus_type,
	.probe = fs_enet_fec_mdio_probe,
	.remove = fs_enet_fec_mdio_remove,
};

int fs_enet_mdio_fec_init(void)
{
	return driver_register(&fs_enet_fec_mdio_driver);
}

void fs_enet_mdio_fec_exit(void)
{
	driver_unregister(&fs_enet_fec_mdio_driver);
}
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>
	24	#include <linux/pci.h>
	25	#include <linux/init.h>
	26	#include <linux/delay.h>
	27	#include <linux/netdevice.h>
	28	#include <linux/etherdevice.h>
	29	#include <linux/skbuff.h>
	30	#include <linux/spinlock.h>
	31	#include <linux/mii.h>
	32	#include <linux/ethtool.h>
	33	#include <linux/bitops.h>
	34	#include <linux/platform_device.h>
	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
	51	static int match_has_phy (struct device dev, void data)
	52	{
	53	struct platform_device* pdev = container_of(dev, struct platform_device, dev);
	54	struct fs_platform_info* fpi;
	55	if(strcmp(pdev->name, (char*)data))
	56	{
	57	return 0;
	58	}
	59
	60	fpi = pdev->dev.platform_data;
	61	if((fpi)&&(fpi->has_phy))
	62	return 1;
	63	return 0;
	64	}
	65
	66	static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
	67	{
	68	struct resource *r;
	69	fec_t *fecp;
	70	char* name = "fsl-cpm-fec";
	71
	72	/* we need fec in order to be useful */
	73	struct platform_device *fec_pdev =
	74	container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
	75	struct platform_device, dev);
	76
	77	if(fec_pdev == NULL) {
	78	printk(KERN_ERR"Unable to find PHY for %s", name);
	79	return -ENODEV;
	80	}
	81
82	r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");
83
84	fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t));
85	fec->mii_speed = fmpi->mii_speed;
86
87	setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
88	setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX \| FEC_ECNTRL_ETHER_EN);
89	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
90	out_be32(&fecp->fec_mii_speed, fec->mii_speed);
91
92	return 0;
93	}
94
95	static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
96	{
97	struct fec_info* fec = bus->priv;
98	fec_t *fecp = fec->fecp;
99	int i, ret = -1;
100
101	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
102	BUG();
103
104	/* Add PHY address to register command. */
105	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_read(location));
106
107	for (i = 0; i < FEC_MII_LOOPS; i++)
108	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
109	break;
110
111	if (i < FEC_MII_LOOPS) {
112	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
113	ret = in_be32(&fecp->fec_mii_data) & 0xffff;
114	}
115
116	return ret;
117
118	}
119
120	static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
121	{
122	struct fec_info* fec = bus->priv;
123	fec_t *fecp = fec->fecp;
124	int i;
125
126	/* this must never happen */
127	if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
128	BUG();
129
130	/* Add PHY address to register command. */
131	out_be32(&fecp->fec_mii_data, (phy_id << 23) \| mk_mii_write(location, val));
132
133	for (i = 0; i < FEC_MII_LOOPS; i++)
134	if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
135	break;
136
137	if (i < FEC_MII_LOOPS)
138	out_be32(&fecp->fec_ievent, FEC_ENET_MII);
139
140	return 0;
141
142	}
143
144	static int fs_enet_fec_mii_reset(struct mii_bus *bus)
145	{
146	/* nothing here - for now */
147	return 0;
148	}
149
150	static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
151	{
152	struct platform_device *pdev = to_platform_device(dev);
153	struct fs_mii_fec_platform_info *pdata;
154	struct mii_bus *new_bus;
155	struct fec_info *fec;
156	int err = 0;
157	if (NULL == dev)
158	return -EINVAL;
159	new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
160
161	if (NULL == new_bus)
162	return -ENOMEM;
163
164	fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
165
166	if (NULL == fec)
167	return -ENOMEM;
168
169	new_bus->name = "FEC MII Bus",
170	new_bus->read = &fs_enet_fec_mii_read,
171	new_bus->write = &fs_enet_fec_mii_write,
172	new_bus->reset = &fs_enet_fec_mii_reset,
173	new_bus->id = pdev->id;
174
175	pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;
176
177	if (NULL == pdata) {
178	printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
179	return -ENODEV;
180	}
181
182	/set up workspace/
183
184	fs_mii_fec_init(fec, pdata);
185	new_bus->priv = fec;
186
187	new_bus->irq = pdata->irq;
188
189	new_bus->dev = dev;
190	dev_set_drvdata(dev, new_bus);
191
192	err = mdiobus_register(new_bus);
193
194	if (0 != err) {
195	printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
196	new_bus->name);
197	goto bus_register_fail;
198	}
199
200	return 0;
201
202	bus_register_fail:
203	kfree(new_bus);
204
205	return err;
206	}
207
208
209	static int fs_enet_fec_mdio_remove(struct device *dev)
210	{
211	struct mii_bus *bus = dev_get_drvdata(dev);
212
213	mdiobus_unregister(bus);
214
215	dev_set_drvdata(dev, NULL);
216	kfree(bus->priv);
217
218	bus->priv = NULL;
219	kfree(bus);
220
221	return 0;
222	}
223
224	static struct device_driver fs_enet_fec_mdio_driver = {
225	.name = "fsl-cpm-fec-mdio",
226	.bus = &platform_bus_type,
227	.probe = fs_enet_fec_mdio_probe,
228	.remove = fs_enet_fec_mdio_remove,
229	};
230
231	int fs_enet_mdio_fec_init(void)
232	{
233	return driver_register(&fs_enet_fec_mdio_driver);
234	}
235
236	void fs_enet_mdio_fec_exit(void)
237	{
238	driver_unregister(&fs_enet_fec_mdio_driver);
239	}
240