/*
* 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/sched.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);
}
