[PATCH] FS_ENET: use PAL for mii management
This patch should update the fs_enet infrastructure to utilize Phy Abstraction Layer subsystem. Along with the above, there are apparent bugfixes, overhaul and improvements. Signed-off-by: Vitaly Bordug <vbordug@ru.mvista.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Vitaly Bordug
committed by
Jeff Garzik
Jeff Garzik
parent
11b0bacd71
commit
5b4b845434
243
drivers/net/fs_enet/mii-fec.c
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243
drivers/net/fs_enet/mii-fec.c
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/*
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* Combined Ethernet driver for Motorola MPC8xx and MPC82xx.
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*
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* Copyright (c) 2003 Intracom S.A.
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* by Pantelis Antoniou <panto@intracom.gr>
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*
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* 2005 (c) MontaVista Software, Inc.
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* Vitaly Bordug <vbordug@ru.mvista.com>
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*
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* This file is licensed under the terms of the GNU General Public License
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* version 2. This program is licensed "as is" without any warranty of any
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* kind, whether express or implied.
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/string.h>
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#include <linux/ptrace.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/spinlock.h>
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#include <linux/mii.h>
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#include <linux/ethtool.h>
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#include <linux/bitops.h>
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#include <linux/platform_device.h>
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#include <asm/pgtable.h>
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#include <asm/irq.h>
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#include <asm/uaccess.h>
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#include "fs_enet.h"
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#include "fec.h"
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/* Make MII read/write commands for the FEC.
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*/
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#define mk_mii_read(REG) (0x60020000 | ((REG & 0x1f) << 18))
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#define mk_mii_write(REG, VAL) (0x50020000 | ((REG & 0x1f) << 18) | (VAL & 0xffff))
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#define mk_mii_end 0
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#define FEC_MII_LOOPS 10000
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static int match_has_phy (struct device *dev, void* data)
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{
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struct platform_device* pdev = container_of(dev, struct platform_device, dev);
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struct fs_platform_info* fpi;
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if(strcmp(pdev->name, (char*)data))
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{
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return 0;
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}
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fpi = pdev->dev.platform_data;
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if((fpi)&&(fpi->has_phy))
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return 1;
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return 0;
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}
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static int fs_mii_fec_init(struct fec_info* fec, struct fs_mii_fec_platform_info *fmpi)
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{
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struct resource *r;
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fec_t *fecp;
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char* name = "fsl-cpm-fec";
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/* we need fec in order to be useful */
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struct platform_device *fec_pdev =
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container_of(bus_find_device(&platform_bus_type, NULL, name, match_has_phy),
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struct platform_device, dev);
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if(fec_pdev == NULL) {
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printk(KERN_ERR"Unable to find PHY for %s", name);
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return -ENODEV;
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}
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r = platform_get_resource_byname(fec_pdev, IORESOURCE_MEM, "regs");
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fec->fecp = fecp = (fec_t*)ioremap(r->start,sizeof(fec_t));
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fec->mii_speed = fmpi->mii_speed;
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setbits32(&fecp->fec_r_cntrl, FEC_RCNTRL_MII_MODE); /* MII enable */
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setbits32(&fecp->fec_ecntrl, FEC_ECNTRL_PINMUX | FEC_ECNTRL_ETHER_EN);
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out_be32(&fecp->fec_ievent, FEC_ENET_MII);
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out_be32(&fecp->fec_mii_speed, fec->mii_speed);
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return 0;
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}
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static int fs_enet_fec_mii_read(struct mii_bus *bus , int phy_id, int location)
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{
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struct fec_info* fec = bus->priv;
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fec_t *fecp = fec->fecp;
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int i, ret = -1;
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if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
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BUG();
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/* Add PHY address to register command. */
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out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_read(location));
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for (i = 0; i < FEC_MII_LOOPS; i++)
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if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
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break;
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if (i < FEC_MII_LOOPS) {
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out_be32(&fecp->fec_ievent, FEC_ENET_MII);
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ret = in_be32(&fecp->fec_mii_data) & 0xffff;
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}
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return ret;
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}
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static int fs_enet_fec_mii_write(struct mii_bus *bus, int phy_id, int location, u16 val)
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{
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struct fec_info* fec = bus->priv;
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fec_t *fecp = fec->fecp;
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int i;
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/* this must never happen */
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if ((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0)
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BUG();
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/* Add PHY address to register command. */
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out_be32(&fecp->fec_mii_data, (phy_id << 23) | mk_mii_write(location, val));
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for (i = 0; i < FEC_MII_LOOPS; i++)
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if ((in_be32(&fecp->fec_ievent) & FEC_ENET_MII) != 0)
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break;
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if (i < FEC_MII_LOOPS)
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out_be32(&fecp->fec_ievent, FEC_ENET_MII);
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return 0;
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}
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static int fs_enet_fec_mii_reset(struct mii_bus *bus)
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{
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/* nothing here - for now */
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return 0;
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}
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static int __devinit fs_enet_fec_mdio_probe(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct fs_mii_fec_platform_info *pdata;
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struct mii_bus *new_bus;
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struct fec_info *fec;
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int err = 0;
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if (NULL == dev)
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return -EINVAL;
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new_bus = kzalloc(sizeof(struct mii_bus), GFP_KERNEL);
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if (NULL == new_bus)
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return -ENOMEM;
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fec = kzalloc(sizeof(struct fec_info), GFP_KERNEL);
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if (NULL == fec)
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return -ENOMEM;
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new_bus->name = "FEC MII Bus",
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new_bus->read = &fs_enet_fec_mii_read,
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new_bus->write = &fs_enet_fec_mii_write,
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new_bus->reset = &fs_enet_fec_mii_reset,
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new_bus->id = pdev->id;
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pdata = (struct fs_mii_fec_platform_info *)pdev->dev.platform_data;
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if (NULL == pdata) {
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printk(KERN_ERR "fs_enet FEC mdio %d: Missing platform data!\n", pdev->id);
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return -ENODEV;
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}
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/*set up workspace*/
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fs_mii_fec_init(fec, pdata);
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new_bus->priv = fec;
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new_bus->irq = pdata->irq;
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new_bus->dev = dev;
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dev_set_drvdata(dev, new_bus);
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err = mdiobus_register(new_bus);
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if (0 != err) {
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printk (KERN_ERR "%s: Cannot register as MDIO bus\n",
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new_bus->name);
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goto bus_register_fail;
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}
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return 0;
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bus_register_fail:
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kfree(new_bus);
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return err;
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}
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static int fs_enet_fec_mdio_remove(struct device *dev)
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{
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struct mii_bus *bus = dev_get_drvdata(dev);
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mdiobus_unregister(bus);
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dev_set_drvdata(dev, NULL);
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kfree(bus->priv);
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bus->priv = NULL;
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kfree(bus);
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return 0;
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}
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static struct device_driver fs_enet_fec_mdio_driver = {
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.name = "fsl-cpm-fec-mdio",
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.bus = &platform_bus_type,
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.probe = fs_enet_fec_mdio_probe,
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.remove = fs_enet_fec_mdio_remove,
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};
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int fs_enet_mdio_fec_init(void)
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{
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return driver_register(&fs_enet_fec_mdio_driver);
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}
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void fs_enet_mdio_fec_exit(void)
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{
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driver_unregister(&fs_enet_fec_mdio_driver);
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}
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