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 0000000..02b16ab
--- /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;
+}