1 files changed, 251 insertions, 0 deletions

diff --git a/drivers/net/fs_enet/mii-fec.c b/drivers/net/fs_enet/mii-fec.c
new file mode 100644
index 00000000000..e0e9d6c35d8
--- /dev/null
+++ b/drivers/net/fs_enet/mii-fec.c
@@ -0,0 +1,251 @@
+/*
+ * 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 <asm/mpc5xxx.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;
+        struct fec __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;
+        struct fec __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 struct of_device_id fs_enet_mdio_fec_match[];
+static int __devinit fs_enet_mdio_probe(struct platform_device *ofdev)
+{
+        const struct of_device_id *match;
+        struct resource res;
+        struct mii_bus *new_bus;
+        struct fec_info *fec;
+        int (*get_bus_freq)(struct device_node *);
+        int ret = -ENOMEM, clock, speed;
+
+        match = of_match_device(fs_enet_mdio_fec_match, &ofdev->dev);
+        if (!match)
+                return -EINVAL;
+        get_bus_freq = match->data;
+
+        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->dev.of_node, 0, &res);
+        if (ret)
+                goto out_res;
+
+        snprintf(new_bus->id, MII_BUS_ID_SIZE, "%x", res.start);
+
+        fec->fecp = ioremap(res.start, resource_size(&res));
+        if (!fec->fecp)
+                goto out_fec;
+
+        if (get_bus_freq) {
+                clock = get_bus_freq(ofdev->dev.of_node);
+                if (!clock) {
+                        /* Use maximum divider if clock is unknown */
+                        dev_warn(&ofdev->dev, "could not determine IPS clock\n");
+                        clock = 0x3F * 5000000;
+                }
+        } else
+                clock = ppc_proc_freq;
+
+        /*
+         * Scale for a MII clock <= 2.5 MHz
+         * Note that only 6 bits (25:30) are available for MII speed.
+         */
+        speed = (clock + 4999999) / 5000000;
+        if (speed > 0x3F) {
+                speed = 0x3F;
+                dev_err(&ofdev->dev,
+                        "MII clock (%d Hz) exceeds max (2.5 MHz)\n",
+                        clock / speed);
+        }
+
+        fec->mii_speed = speed << 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);
+        clrsetbits_be32(&fec->fecp->fec_mii_speed, 0x7E, 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->dev.of_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 platform_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",
+        },
+#if defined(CONFIG_PPC_MPC512x)
+        {
+                .compatible = "fsl,mpc5121-fec-mdio",
+                .data = mpc5xxx_get_bus_frequency,
+        },
+#endif
+        {},
+};
+MODULE_DEVICE_TABLE(of, fs_enet_mdio_fec_match);
+
+static struct platform_driver fs_enet_fec_mdio_driver = {
+        .driver = {
+                .name = "fsl-fec-mdio",
+                .owner = THIS_MODULE,
+                .of_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 platform_driver_register(&fs_enet_fec_mdio_driver);
+}
+
+static void fs_enet_mdio_fec_exit(void)
+{
+        platform_driver_unregister(&fs_enet_fec_mdio_driver);
+}
+
+module_init(fs_enet_mdio_fec_init);
+module_exit(fs_enet_mdio_fec_exit);