/* * 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 <linux/of_platform.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 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; BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); /* 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 */ BUG_ON((in_be32(&fecp->fec_r_cntrl) & FEC_RCNTRL_MII_MODE) == 0); /* 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_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 = mdiobus_alloc(); 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; new_bus->parent = &ofdev->dev; dev_set_drvdata(&ofdev->dev, new_bus); ret = of_mdiobus_register(new_bus, ofdev->node); 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: mdiobus_free(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); mdiobus_free(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);