/* * 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> #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); }