linux/drivers/net/fs_enet/mii-fec.c

381 lines
8.6 KiB
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 <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#ifdef CONFIG_PPC_CPM_NEW_BINDING
#include <linux/of_platform.h>
#endif
#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
#ifndef CONFIG_PPC_CPM_NEW_BINDING
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 __iomem *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 = 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;
}
#endif
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;
}
#ifdef CONFIG_PPC_CPM_NEW_BINDING
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->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(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);
#else
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,
snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", 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);
}
#endif