Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 661 insertions, 0 deletions

diff --git a/drivers/net/gianfar_phy.c b/drivers/net/gianfar_phy.c
new file mode 100644
index 000000000000..02b16abc89bd
--- /dev/null
+++ b/drivers/net/gianfar_phy.c
@@ -0,0 +1,661 @@
+/* 
+ * drivers/net/gianfar_phy.c
+ *
+ * Gianfar Ethernet Driver -- PHY handling
+ * Driver for FEC on MPC8540 and TSEC on MPC8540/MPC8560
+ * Based on 8260_io/fcc_enet.c
+ *
+ * Author: Andy Fleming
+ * Maintainer: Kumar Gala (kumar.gala@freescale.com)
+ *
+ * Copyright (c) 2002-2004 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.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/mm.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/crc32.h>
+#include <linux/mii.h>
+
+#include "gianfar.h"
+#include "gianfar_phy.h"
+
+static void config_genmii_advert(struct gfar_mii_info *mii_info);
+static void genmii_setup_forced(struct gfar_mii_info *mii_info);
+static void genmii_restart_aneg(struct gfar_mii_info *mii_info);
+static int gbit_config_aneg(struct gfar_mii_info *mii_info);
+static int genmii_config_aneg(struct gfar_mii_info *mii_info);
+static int genmii_update_link(struct gfar_mii_info *mii_info);
+static int genmii_read_status(struct gfar_mii_info *mii_info);
+u16 phy_read(struct gfar_mii_info *mii_info, u16 regnum);
+void phy_write(struct gfar_mii_info *mii_info, u16 regnum, u16 val);
+
+/* Write value to the PHY for this device to the register at regnum, */
+/* waiting until the write is done before it returns.  All PHY */
+/* configuration has to be done through the TSEC1 MIIM regs */
+void write_phy_reg(struct net_device *dev, int mii_id, int regnum, int value)
+{
+        struct gfar_private *priv = netdev_priv(dev);
+        struct gfar *regbase = priv->phyregs;
+
+        /* Set the PHY address and the register address we want to write */
+        gfar_write(&regbase->miimadd, (mii_id << 8) | regnum);
+
+        /* Write out the value we want */
+        gfar_write(&regbase->miimcon, value);
+
+        /* Wait for the transaction to finish */
+        while (gfar_read(&regbase->miimind) & MIIMIND_BUSY)
+                cpu_relax();
+}
+
+/* Reads from register regnum in the PHY for device dev, */
+/* returning the value.  Clears miimcom first.  All PHY */
+/* configuration has to be done through the TSEC1 MIIM regs */
+int read_phy_reg(struct net_device *dev, int mii_id, int regnum)
+{
+        struct gfar_private *priv = netdev_priv(dev);
+        struct gfar *regbase = priv->phyregs;
+        u16 value;
+
+        /* Set the PHY address and the register address we want to read */
+        gfar_write(&regbase->miimadd, (mii_id << 8) | regnum);
+
+        /* Clear miimcom, and then initiate a read */
+        gfar_write(&regbase->miimcom, 0);
+        gfar_write(&regbase->miimcom, MII_READ_COMMAND);
+
+        /* Wait for the transaction to finish */
+        while (gfar_read(&regbase->miimind) & (MIIMIND_NOTVALID | MIIMIND_BUSY))
+                cpu_relax();
+
+        /* Grab the value of the register from miimstat */
+        value = gfar_read(&regbase->miimstat);
+
+        return value;
+}
+
+void mii_clear_phy_interrupt(struct gfar_mii_info *mii_info)
+{
+        if(mii_info->phyinfo->ack_interrupt)
+                mii_info->phyinfo->ack_interrupt(mii_info);
+}
+
+
+void mii_configure_phy_interrupt(struct gfar_mii_info *mii_info, u32 interrupts)
+{
+        mii_info->interrupts = interrupts;
+        if(mii_info->phyinfo->config_intr)
+                mii_info->phyinfo->config_intr(mii_info);
+}
+
+
+/* Writes MII_ADVERTISE with the appropriate values, after
+ * sanitizing advertise to make sure only supported features
+ * are advertised 
+ */
+static void config_genmii_advert(struct gfar_mii_info *mii_info)
+{
+        u32 advertise;
+        u16 adv;
+
+        /* Only allow advertising what this PHY supports */
+        mii_info->advertising &= mii_info->phyinfo->features;
+        advertise = mii_info->advertising;
+
+        /* Setup standard advertisement */
+        adv = phy_read(mii_info, MII_ADVERTISE);
+        adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
+        if (advertise & ADVERTISED_10baseT_Half)
+                adv |= ADVERTISE_10HALF;
+        if (advertise & ADVERTISED_10baseT_Full)
+                adv |= ADVERTISE_10FULL;
+        if (advertise & ADVERTISED_100baseT_Half)
+                adv |= ADVERTISE_100HALF;
+        if (advertise & ADVERTISED_100baseT_Full)
+                adv |= ADVERTISE_100FULL;
+        phy_write(mii_info, MII_ADVERTISE, adv);
+}
+
+static void genmii_setup_forced(struct gfar_mii_info *mii_info)
+{
+        u16 ctrl;
+        u32 features = mii_info->phyinfo->features;
+        
+        ctrl = phy_read(mii_info, MII_BMCR);
+
+        ctrl &= ~(BMCR_FULLDPLX|BMCR_SPEED100|BMCR_SPEED1000|BMCR_ANENABLE);
+        ctrl |= BMCR_RESET;
+
+        switch(mii_info->speed) {
+                case SPEED_1000:
+                        if(features & (SUPPORTED_1000baseT_Half
+                                                | SUPPORTED_1000baseT_Full)) {
+                                ctrl |= BMCR_SPEED1000;
+                                break;
+                        }
+                        mii_info->speed = SPEED_100;
+                case SPEED_100:
+                        if (features & (SUPPORTED_100baseT_Half
+                                                | SUPPORTED_100baseT_Full)) {
+                                ctrl |= BMCR_SPEED100;
+                                break;
+                        }
+                        mii_info->speed = SPEED_10;
+                case SPEED_10:
+                        if (features & (SUPPORTED_10baseT_Half
+                                                | SUPPORTED_10baseT_Full))
+                                break;
+                default: /* Unsupported speed! */
+                        printk(KERN_ERR "%s: Bad speed!\n", 
+                                        mii_info->dev->name);
+                        break;
+        }
+
+        phy_write(mii_info, MII_BMCR, ctrl);
+}
+
+
+/* Enable and Restart Autonegotiation */
+static void genmii_restart_aneg(struct gfar_mii_info *mii_info)
+{
+        u16 ctl;
+
+        ctl = phy_read(mii_info, MII_BMCR);
+        ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
+        phy_write(mii_info, MII_BMCR, ctl);
+}
+
+
+static int gbit_config_aneg(struct gfar_mii_info *mii_info)
+{
+        u16 adv;
+        u32 advertise;
+
+        if(mii_info->autoneg) {
+                /* Configure the ADVERTISE register */
+                config_genmii_advert(mii_info);
+                advertise = mii_info->advertising;
+
+                adv = phy_read(mii_info, MII_1000BASETCONTROL);
+                adv &= ~(MII_1000BASETCONTROL_FULLDUPLEXCAP |
+                                MII_1000BASETCONTROL_HALFDUPLEXCAP);
+                if (advertise & SUPPORTED_1000baseT_Half)
+                        adv |= MII_1000BASETCONTROL_HALFDUPLEXCAP;
+                if (advertise & SUPPORTED_1000baseT_Full)
+                        adv |= MII_1000BASETCONTROL_FULLDUPLEXCAP;
+                phy_write(mii_info, MII_1000BASETCONTROL, adv);
+
+                /* Start/Restart aneg */
+                genmii_restart_aneg(mii_info);
+        } else
+                genmii_setup_forced(mii_info);
+
+        return 0;
+}
+
+static int marvell_config_aneg(struct gfar_mii_info *mii_info)
+{
+        /* The Marvell PHY has an errata which requires
+         * that certain registers get written in order
+         * to restart autonegotiation */
+        phy_write(mii_info, MII_BMCR, BMCR_RESET);
+
+        phy_write(mii_info, 0x1d, 0x1f);
+        phy_write(mii_info, 0x1e, 0x200c);
+        phy_write(mii_info, 0x1d, 0x5);
+        phy_write(mii_info, 0x1e, 0);
+        phy_write(mii_info, 0x1e, 0x100);
+
+        gbit_config_aneg(mii_info);
+
+        return 0;
+}
+static int genmii_config_aneg(struct gfar_mii_info *mii_info)
+{
+        if (mii_info->autoneg) {
+                config_genmii_advert(mii_info);
+                genmii_restart_aneg(mii_info);
+        } else
+                genmii_setup_forced(mii_info);
+
+        return 0;
+}
+
+
+static int genmii_update_link(struct gfar_mii_info *mii_info)
+{
+        u16 status;
+
+        /* Do a fake read */
+        phy_read(mii_info, MII_BMSR);
+
+        /* Read link and autonegotiation status */
+        status = phy_read(mii_info, MII_BMSR);
+        if ((status & BMSR_LSTATUS) == 0)
+                mii_info->link = 0;
+        else
+                mii_info->link = 1;
+
+        /* If we are autonegotiating, and not done, 
+         * return an error */
+        if (mii_info->autoneg && !(status & BMSR_ANEGCOMPLETE))
+                return -EAGAIN;
+
+        return 0;
+}
+
+static int genmii_read_status(struct gfar_mii_info *mii_info)
+{
+        u16 status;
+        int err;
+
+        /* Update the link, but return if there
+         * was an error */
+        err = genmii_update_link(mii_info);
+        if (err)
+                return err;
+
+        if (mii_info->autoneg) {
+                status = phy_read(mii_info, MII_LPA);
+
+                if (status & (LPA_10FULL | LPA_100FULL))
+                        mii_info->duplex = DUPLEX_FULL;
+                else
+                        mii_info->duplex = DUPLEX_HALF;
+                if (status & (LPA_100FULL | LPA_100HALF))
+                        mii_info->speed = SPEED_100;
+                else
+                        mii_info->speed = SPEED_10;
+                mii_info->pause = 0;
+        }
+        /* On non-aneg, we assume what we put in BMCR is the speed,
+         * though magic-aneg shouldn't prevent this case from occurring
+         */
+
+        return 0;
+}
+static int marvell_read_status(struct gfar_mii_info *mii_info)
+{
+        u16 status;
+        int err;
+
+        /* Update the link, but return if there
+         * was an error */
+        err = genmii_update_link(mii_info);
+        if (err)
+                return err;
+
+        /* If the link is up, read the speed and duplex */
+        /* If we aren't autonegotiating, assume speeds 
+         * are as set */
+        if (mii_info->autoneg && mii_info->link) {
+                int speed;
+                status = phy_read(mii_info, MII_M1011_PHY_SPEC_STATUS);
+
+#if 0
+                /* If speed and duplex aren't resolved,
+                 * return an error.  Isn't this handled
+                 * by checking aneg?
+                 */
+                if ((status & MII_M1011_PHY_SPEC_STATUS_RESOLVED) == 0)
+                        return -EAGAIN;
+#endif
+
+                /* Get the duplexity */
+                if (status & MII_M1011_PHY_SPEC_STATUS_FULLDUPLEX)
+                        mii_info->duplex = DUPLEX_FULL;
+                else
+                        mii_info->duplex = DUPLEX_HALF;
+
+                /* Get the speed */
+                speed = status & MII_M1011_PHY_SPEC_STATUS_SPD_MASK;
+                switch(speed) {
+                        case MII_M1011_PHY_SPEC_STATUS_1000:
+                                mii_info->speed = SPEED_1000;
+                                break;
+                        case MII_M1011_PHY_SPEC_STATUS_100:
+                                mii_info->speed = SPEED_100;
+                                break;
+                        default:
+                                mii_info->speed = SPEED_10;
+                                break;
+                }
+                mii_info->pause = 0;
+        }
+
+        return 0;
+}
+
+
+static int cis820x_read_status(struct gfar_mii_info *mii_info)
+{
+        u16 status;
+        int err;
+
+        /* Update the link, but return if there
+         * was an error */
+        err = genmii_update_link(mii_info);
+        if (err)
+                return err;
+
+        /* If the link is up, read the speed and duplex */
+        /* If we aren't autonegotiating, assume speeds 
+         * are as set */
+        if (mii_info->autoneg && mii_info->link) {
+                int speed;
+
+                status = phy_read(mii_info, MII_CIS8201_AUX_CONSTAT);
+                if (status & MII_CIS8201_AUXCONSTAT_DUPLEX)
+                        mii_info->duplex = DUPLEX_FULL;
+                else
+                        mii_info->duplex = DUPLEX_HALF;
+
+                speed = status & MII_CIS8201_AUXCONSTAT_SPEED;
+
+                switch (speed) {
+                case MII_CIS8201_AUXCONSTAT_GBIT:
+                        mii_info->speed = SPEED_1000;
+                        break;
+                case MII_CIS8201_AUXCONSTAT_100:
+                        mii_info->speed = SPEED_100;
+                        break;
+                default:
+                        mii_info->speed = SPEED_10;
+                        break;
+                }
+        }
+
+        return 0;
+}
+
+static int marvell_ack_interrupt(struct gfar_mii_info *mii_info)
+{
+        /* Clear the interrupts by reading the reg */
+        phy_read(mii_info, MII_M1011_IEVENT);
+
+        return 0;
+}
+
+static int marvell_config_intr(struct gfar_mii_info *mii_info)
+{
+        if(mii_info->interrupts == MII_INTERRUPT_ENABLED)
+                phy_write(mii_info, MII_M1011_IMASK, MII_M1011_IMASK_INIT);
+        else
+                phy_write(mii_info, MII_M1011_IMASK, MII_M1011_IMASK_CLEAR);
+
+        return 0;
+}
+
+static int cis820x_init(struct gfar_mii_info *mii_info)
+{
+        phy_write(mii_info, MII_CIS8201_AUX_CONSTAT, 
+                        MII_CIS8201_AUXCONSTAT_INIT);
+        phy_write(mii_info, MII_CIS8201_EXT_CON1,
+                        MII_CIS8201_EXTCON1_INIT);
+
+        return 0;
+}
+
+static int cis820x_ack_interrupt(struct gfar_mii_info *mii_info)
+{
+        phy_read(mii_info, MII_CIS8201_ISTAT);
+
+        return 0;
+}
+
+static int cis820x_config_intr(struct gfar_mii_info *mii_info)
+{
+        if(mii_info->interrupts == MII_INTERRUPT_ENABLED)
+                phy_write(mii_info, MII_CIS8201_IMASK, MII_CIS8201_IMASK_MASK);
+        else
+                phy_write(mii_info, MII_CIS8201_IMASK, 0);
+
+        return 0;
+}
+
+#define DM9161_DELAY 10
+
+static int dm9161_read_status(struct gfar_mii_info *mii_info)
+{
+        u16 status;
+        int err;
+
+        /* Update the link, but return if there
+         * was an error */
+        err = genmii_update_link(mii_info);
+        if (err)
+                return err;
+
+        /* If the link is up, read the speed and duplex */
+        /* If we aren't autonegotiating, assume speeds 
+         * are as set */
+        if (mii_info->autoneg && mii_info->link) {
+                status = phy_read(mii_info, MII_DM9161_SCSR);
+                if (status & (MII_DM9161_SCSR_100F | MII_DM9161_SCSR_100H))
+                        mii_info->speed = SPEED_100;
+                else
+                        mii_info->speed = SPEED_10;
+
+                if (status & (MII_DM9161_SCSR_100F | MII_DM9161_SCSR_10F))
+                        mii_info->duplex = DUPLEX_FULL;
+                else
+                        mii_info->duplex = DUPLEX_HALF;
+        }
+
+        return 0;
+}
+
+
+static int dm9161_config_aneg(struct gfar_mii_info *mii_info)
+{
+        struct dm9161_private *priv = mii_info->priv;
+
+        if(0 == priv->resetdone)
+                return -EAGAIN;
+
+        return 0;
+}
+
+static void dm9161_timer(unsigned long data)
+{
+        struct gfar_mii_info *mii_info = (struct gfar_mii_info *)data;
+        struct dm9161_private *priv = mii_info->priv;
+        u16 status = phy_read(mii_info, MII_BMSR);
+
+        if (status & BMSR_ANEGCOMPLETE) {
+                priv->resetdone = 1;
+        } else
+                mod_timer(&priv->timer, jiffies + DM9161_DELAY * HZ);
+}
+
+static int dm9161_init(struct gfar_mii_info *mii_info)
+{
+        struct dm9161_private *priv;
+
+        /* Allocate the private data structure */
+        priv = kmalloc(sizeof(struct dm9161_private), GFP_KERNEL);
+
+        if (NULL == priv)
+                return -ENOMEM;
+
+        mii_info->priv = priv;
+
+        /* Reset is not done yet */
+        priv->resetdone = 0;
+
+        /* Isolate the PHY */
+        phy_write(mii_info, MII_BMCR, BMCR_ISOLATE);
+
+        /* Do not bypass the scrambler/descrambler */
+        phy_write(mii_info, MII_DM9161_SCR, MII_DM9161_SCR_INIT);
+
+        /* Clear 10BTCSR to default */
+        phy_write(mii_info, MII_DM9161_10BTCSR, MII_DM9161_10BTCSR_INIT);
+
+        /* Reconnect the PHY, and enable Autonegotiation */
+        phy_write(mii_info, MII_BMCR, BMCR_ANENABLE);
+
+        /* Start a timer for DM9161_DELAY seconds to wait
+         * for the PHY to be ready */
+        init_timer(&priv->timer);
+        priv->timer.function = &dm9161_timer;
+        priv->timer.data = (unsigned long) mii_info;
+        mod_timer(&priv->timer, jiffies + DM9161_DELAY * HZ);
+
+        return 0;
+}
+
+static void dm9161_close(struct gfar_mii_info *mii_info)
+{
+        struct dm9161_private *priv = mii_info->priv;
+
+        del_timer_sync(&priv->timer);
+        kfree(priv);
+}
+
+#if 0
+static int dm9161_ack_interrupt(struct gfar_mii_info *mii_info)
+{
+        phy_read(mii_info, MII_DM9161_INTR);
+
+        return 0;
+}
+#endif
+
+/* Cicada 820x */
+static struct phy_info phy_info_cis820x = {
+        0x000fc440,
+        "Cicada Cis8204",
+        0x000fffc0,
+        .features       = MII_GBIT_FEATURES,
+        .init           = &cis820x_init,
+        .config_aneg    = &gbit_config_aneg,
+        .read_status    = &cis820x_read_status,
+        .ack_interrupt  = &cis820x_ack_interrupt,
+        .config_intr    = &cis820x_config_intr,
+};
+
+static struct phy_info phy_info_dm9161 = {
+        .phy_id         = 0x0181b880,
+        .name           = "Davicom DM9161E",
+        .phy_id_mask    = 0x0ffffff0,
+        .init           = dm9161_init,
+        .config_aneg    = dm9161_config_aneg,
+        .read_status    = dm9161_read_status,
+        .close          = dm9161_close,
+};
+
+static struct phy_info phy_info_marvell = {
+        .phy_id         = 0x01410c00,
+        .phy_id_mask    = 0xffffff00,
+        .name           = "Marvell 88E1101",
+        .features       = MII_GBIT_FEATURES,
+        .config_aneg    = &marvell_config_aneg,
+        .read_status    = &marvell_read_status,
+        .ack_interrupt  = &marvell_ack_interrupt,
+        .config_intr    = &marvell_config_intr,
+};
+
+static struct phy_info phy_info_genmii= {
+        .phy_id         = 0x00000000,
+        .phy_id_mask    = 0x00000000,
+        .name           = "Generic MII",
+        .features       = MII_BASIC_FEATURES,
+        .config_aneg    = genmii_config_aneg,
+        .read_status    = genmii_read_status,
+};
+
+static struct phy_info *phy_info[] = {
+        &phy_info_cis820x,
+        &phy_info_marvell,
+        &phy_info_dm9161,
+        &phy_info_genmii,
+        NULL
+};
+
+u16 phy_read(struct gfar_mii_info *mii_info, u16 regnum)
+{
+        u16 retval;
+        unsigned long flags;
+
+        spin_lock_irqsave(&mii_info->mdio_lock, flags);
+        retval = mii_info->mdio_read(mii_info->dev, mii_info->mii_id, regnum);
+        spin_unlock_irqrestore(&mii_info->mdio_lock, flags);
+
+        return retval;
+}
+
+void phy_write(struct gfar_mii_info *mii_info, u16 regnum, u16 val)
+{
+        unsigned long flags;
+
+        spin_lock_irqsave(&mii_info->mdio_lock, flags);
+        mii_info->mdio_write(mii_info->dev, 
+                        mii_info->mii_id, 
+                        regnum, val);
+        spin_unlock_irqrestore(&mii_info->mdio_lock, flags);
+}
+
+/* Use the PHY ID registers to determine what type of PHY is attached
+ * to device dev.  return a struct phy_info structure describing that PHY
+ */
+struct phy_info * get_phy_info(struct gfar_mii_info *mii_info)
+{
+        u16 phy_reg;
+        u32 phy_ID;
+        int i;
+        struct phy_info *theInfo = NULL;
+        struct net_device *dev = mii_info->dev;
+
+        /* Grab the bits from PHYIR1, and put them in the upper half */
+        phy_reg = phy_read(mii_info, MII_PHYSID1);
+        phy_ID = (phy_reg & 0xffff) << 16;
+
+        /* Grab the bits from PHYIR2, and put them in the lower half */
+        phy_reg = phy_read(mii_info, MII_PHYSID2);
+        phy_ID |= (phy_reg & 0xffff);
+
+        /* loop through all the known PHY types, and find one that */
+        /* matches the ID we read from the PHY. */
+        for (i = 0; phy_info[i]; i++)
+                if (phy_info[i]->phy_id == 
+                                (phy_ID & phy_info[i]->phy_id_mask)) {
+                        theInfo = phy_info[i];
+                        break;
+                }
+
+        /* This shouldn't happen, as we have generic PHY support */
+        if (theInfo == NULL) {
+                printk("%s: PHY id %x is not supported!\n", dev->name, phy_ID);
+                return NULL;
+        } else {
+                printk("%s: PHY is %s (%x)\n", dev->name, theInfo->name,
+                       phy_ID);
+        }
+
+        return theInfo;
+}