Add new IBM PPC4xx EMAC net driver.

drivers/net/Kconfig

@@ -1210,6 +1210,39 @@ config IBMVETH
 	  <file:Documentation/networking/net-modules.txt>. The module will
 	  be called ibmveth.
 
+config IBM_EMAC
+       tristate "IBM PPC4xx EMAC driver support"
+       depends on 4xx
+       ---help---
+       This driver supports the IBM PPC4xx EMAC family of on-chip
+       Ethernet controllers.
+
+config IBM_EMAC_ERRMSG
+       bool "Verbose error messages"
+       depends on IBM_EMAC
+
+config IBM_EMAC_RXB
+       int "Number of receive buffers"
+       depends on IBM_EMAC
+       default "128" if IBM_EMAC4
+       default "64"
+
+config IBM_EMAC_TXB
+       int "Number of transmit buffers"
+       depends on IBM_EMAC
+       default "128" if IBM_EMAC4
+       default "8"
+
+config IBM_EMAC_FGAP
+       int "Frame gap"
+       depends on IBM_EMAC
+       default "8"
+
+config IBM_EMAC_SKBRES
+       int "Skb reserve amount"
+       depends on IBM_EMAC
+       default "0"
+
 config NET_PCI
 	bool "EISA, VLB, PCI and on board controllers"
 	depends on NET_ETHERNET && (ISA || EISA || PCI)

drivers/net/Makefile

@@ -7,6 +7,7 @@ ifeq ($(CONFIG_ISDN_PPP),y)
 endif
 
 obj-$(CONFIG_E1000) += e1000/
+obj-$(CONFIG_IBM_EMAC) += ibm_emac/
 obj-$(CONFIG_IXGB) += ixgb/
 obj-$(CONFIG_BONDING) += bonding/
 

drivers/net/ibm_emac/Makefile

+#
+# Makefile for the IBM PPC4xx EMAC controllers
+#
+
+obj-$(CONFIG_IBM_EMAC) += ibm_emac.o
+
+ibm_emac-objs := ibm_emac_mal.o ibm_emac_core.o ibm_emac_phy.o
+
+# Only need this if you want to see additional debug messages
+ifeq ($(CONFIG_IBM_EMAC_ERRMSG), y)
+ibm_emac-objs += ibm_emac_debug.o
+endif

drivers/net/ibm_emac/ibm_emac.h

+/*
+ * ibm_emac.h
+ *
+ *
+ *      Armin Kuster akuster@mvista.com
+ *      June, 2002
+ *
+ * Copyright 2002 MontaVista Softare 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.
+ */
+
+#ifndef _IBM_EMAC_H_
+#define _IBM_EMAC_H_
+/* General defines needed for the driver */
+
+/* Emac */
+typedef struct emac_regs {
+	u32 em0mr0;
+	u32 em0mr1;
+	u32 em0tmr0;
+	u32 em0tmr1;
+	u32 em0rmr;
+	u32 em0isr;
+	u32 em0iser;
+	u32 em0iahr;
+	u32 em0ialr;
+	u32 em0vtpid;
+	u32 em0vtci;
+	u32 em0ptr;
+	u32 em0iaht1;
+	u32 em0iaht2;
+	u32 em0iaht3;
+	u32 em0iaht4;
+	u32 em0gaht1;
+	u32 em0gaht2;
+	u32 em0gaht3;
+	u32 em0gaht4;
+	u32 em0lsah;
+	u32 em0lsal;
+	u32 em0ipgvr;
+	u32 em0stacr;
+	u32 em0trtr;
+	u32 em0rwmr;
+} emac_t;
+
+/* MODE REG 0 */
+#define EMAC_M0_RXI			0x80000000
+#define EMAC_M0_TXI			0x40000000
+#define EMAC_M0_SRST			0x20000000
+#define EMAC_M0_TXE			0x10000000
+#define EMAC_M0_RXE			0x08000000
+#define EMAC_M0_WKE			0x04000000
+
+/* MODE Reg 1 */
+#define EMAC_M1_FDE			0x80000000
+#define EMAC_M1_ILE			0x40000000
+#define EMAC_M1_VLE			0x20000000
+#define EMAC_M1_EIFC			0x10000000
+#define EMAC_M1_APP			0x08000000
+#define EMAC_M1_AEMI			0x02000000
+#define EMAC_M1_IST			0x01000000
+#define EMAC_M1_MF_1000GPCS		0x00c00000	/* Internal GPCS */
+#define EMAC_M1_MF_1000MBPS		0x00800000	/* External GPCS */
+#define EMAC_M1_MF_100MBPS		0x00400000
+#define EMAC_M1_RFS_16K                 0x00280000	/* 000 for 512 byte */
+#define EMAC_M1_TR			0x00008000
+#ifdef CONFIG_IBM_EMAC4
+#define EMAC_M1_RFS_8K                  0x00200000
+#define EMAC_M1_RFS_4K                  0x00180000
+#define EMAC_M1_RFS_2K                  0x00100000
+#define EMAC_M1_RFS_1K                  0x00080000
+#define EMAC_M1_TX_FIFO_16K             0x00050000	/* 0's for 512 byte */
+#define EMAC_M1_TX_FIFO_8K              0x00040000
+#define EMAC_M1_TX_FIFO_4K              0x00030000
+#define EMAC_M1_TX_FIFO_2K              0x00020000
+#define EMAC_M1_TX_FIFO_1K              0x00010000
+#define EMAC_M1_TX_TR                   0x00008000
+#define EMAC_M1_TX_MWSW                 0x00001000	/* 0 wait for status */
+#define EMAC_M1_JUMBO_ENABLE            0x00000800	/* Upt to 9Kr status */
+#define EMAC_M1_OPB_CLK_66              0x00000008	/* 66Mhz */
+#define EMAC_M1_OPB_CLK_83              0x00000010	/* 83Mhz */
+#define EMAC_M1_OPB_CLK_100             0x00000018	/* 100Mhz */
+#define EMAC_M1_OPB_CLK_100P            0x00000020	/* 100Mhz+ */
+#else				/* CONFIG_IBM_EMAC4 */
+#define EMAC_M1_RFS_4K			0x00300000	/* ~4k for 512 byte */
+#define EMAC_M1_RFS_2K			0x00200000
+#define EMAC_M1_RFS_1K			0x00100000
+#define EMAC_M1_TX_FIFO_2K		0x00080000	/* 0's for 512 byte */
+#define EMAC_M1_TX_FIFO_1K		0x00040000
+#define EMAC_M1_TR0_DEPEND		0x00010000	/* 0'x for single packet */
+#define EMAC_M1_TR1_DEPEND		0x00004000
+#define EMAC_M1_TR1_MULTI		0x00002000
+#define EMAC_M1_JUMBO_ENABLE		0x00001000
+#endif				/* CONFIG_IBM_EMAC4 */
+#define EMAC_M1_BASE			(EMAC_M1_TX_FIFO_2K | \
+					EMAC_M1_APP | \
+					EMAC_M1_TR)
+
+/* Transmit Mode Register 0 */
+#define EMAC_TMR0_GNP0			0x80000000
+#define EMAC_TMR0_GNP1			0x40000000
+#define EMAC_TMR0_GNPD			0x20000000
+#define EMAC_TMR0_FC			0x10000000
+#define EMAC_TMR0_TFAE_2_32		0x00000001
+#define EMAC_TMR0_TFAE_4_64		0x00000002
+#define EMAC_TMR0_TFAE_8_128		0x00000003
+#define EMAC_TMR0_TFAE_16_256		0x00000004
+#define EMAC_TMR0_TFAE_32_512		0x00000005
+#define EMAC_TMR0_TFAE_64_1024		0x00000006
+#define EMAC_TMR0_TFAE_128_2048		0x00000007
+
+/* Receive Mode Register */
+#define EMAC_RMR_SP			0x80000000
+#define EMAC_RMR_SFCS			0x40000000
+#define EMAC_RMR_ARRP			0x20000000
+#define EMAC_RMR_ARP			0x10000000
+#define EMAC_RMR_AROP			0x08000000
+#define EMAC_RMR_ARPI			0x04000000
+#define EMAC_RMR_PPP			0x02000000
+#define EMAC_RMR_PME			0x01000000
+#define EMAC_RMR_PMME			0x00800000
+#define EMAC_RMR_IAE			0x00400000
+#define EMAC_RMR_MIAE			0x00200000
+#define EMAC_RMR_BAE			0x00100000
+#define EMAC_RMR_MAE			0x00080000
+#define EMAC_RMR_RFAF_2_32		0x00000001
+#define EMAC_RMR_RFAF_4_64		0x00000002
+#define EMAC_RMR_RFAF_8_128		0x00000003
+#define EMAC_RMR_RFAF_16_256		0x00000004
+#define EMAC_RMR_RFAF_32_512		0x00000005
+#define EMAC_RMR_RFAF_64_1024		0x00000006
+#define EMAC_RMR_RFAF_128_2048		0x00000007
+#define EMAC_RMR_BASE			(EMAC_RMR_IAE | EMAC_RMR_BAE)
+
+/* Interrupt Status & enable Regs */
+#define EMAC_ISR_OVR			0x02000000
+#define EMAC_ISR_PP			0x01000000
+#define EMAC_ISR_BP			0x00800000
+#define EMAC_ISR_RP			0x00400000
+#define EMAC_ISR_SE			0x00200000
+#define EMAC_ISR_ALE			0x00100000
+#define EMAC_ISR_BFCS			0x00080000
+#define EMAC_ISR_PTLE			0x00040000
+#define EMAC_ISR_ORE			0x00020000
+#define EMAC_ISR_IRE			0x00010000
+#define EMAC_ISR_DBDM			0x00000200
+#define EMAC_ISR_DB0			0x00000100
+#define EMAC_ISR_SE0			0x00000080
+#define EMAC_ISR_TE0			0x00000040
+#define EMAC_ISR_DB1			0x00000020
+#define EMAC_ISR_SE1			0x00000010
+#define EMAC_ISR_TE1			0x00000008
+#define EMAC_ISR_MOS			0x00000002
+#define EMAC_ISR_MOF			0x00000001
+
+/* STA CONTROL REG */
+#define EMAC_STACR_OC			0x00008000
+#define EMAC_STACR_PHYE			0x00004000
+#define EMAC_STACR_WRITE		0x00002000
+#define EMAC_STACR_READ			0x00001000
+#define EMAC_STACR_CLK_83MHZ		0x00000800	/* 0's for 50Mhz */
+#define EMAC_STACR_CLK_66MHZ		0x00000400
+#define EMAC_STACR_CLK_100MHZ		0x00000C00
+
+/* Transmit Request Threshold Register */
+#define EMAC_TRTR_1600			0x18000000	/* 0's for 64 Bytes */
+#define EMAC_TRTR_1024			0x0f000000
+#define EMAC_TRTR_512			0x07000000
+#define EMAC_TRTR_256			0x03000000
+#define EMAC_TRTR_192			0x10000000
+#define EMAC_TRTR_128			0x01000000
+
+#define EMAC_TX_CTRL_GFCS		0x0200
+#define EMAC_TX_CTRL_GP			0x0100
+#define EMAC_TX_CTRL_ISA		0x0080
+#define EMAC_TX_CTRL_RSA		0x0040
+#define EMAC_TX_CTRL_IVT		0x0020
+#define EMAC_TX_CTRL_RVT		0x0010
+#define EMAC_TX_CTRL_TAH_CSUM		0x000e	/* TAH only */
+#define EMAC_TX_CTRL_TAH_SEG4		0x000a	/* TAH only */
+#define EMAC_TX_CTRL_TAH_SEG3		0x0008	/* TAH only */
+#define EMAC_TX_CTRL_TAH_SEG2		0x0006	/* TAH only */
+#define EMAC_TX_CTRL_TAH_SEG1		0x0004	/* TAH only */
+#define EMAC_TX_CTRL_TAH_SEG0		0x0002	/* TAH only */
+#define EMAC_TX_CTRL_TAH_DIS		0x0000	/* TAH only */
+
+#define EMAC_TX_CTRL_DFLT ( \
+	MAL_TX_CTRL_INTR | EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP )
+
+/* madmal transmit status / Control bits */
+#define EMAC_TX_ST_BFCS			0x0200
+#define EMAC_TX_ST_BPP			0x0100
+#define EMAC_TX_ST_LCS			0x0080
+#define EMAC_TX_ST_ED			0x0040
+#define EMAC_TX_ST_EC			0x0020
+#define EMAC_TX_ST_LC			0x0010
+#define EMAC_TX_ST_MC			0x0008
+#define EMAC_TX_ST_SC			0x0004
+#define EMAC_TX_ST_UR			0x0002
+#define EMAC_TX_ST_SQE			0x0001
+
+/* madmal receive status / Control bits */
+#define EMAC_RX_ST_OE			0x0200
+#define EMAC_RX_ST_PP			0x0100
+#define EMAC_RX_ST_BP			0x0080
+#define EMAC_RX_ST_RP			0x0040
+#define EMAC_RX_ST_SE			0x0020
+#define EMAC_RX_ST_AE			0x0010
+#define EMAC_RX_ST_BFCS			0x0008
+#define EMAC_RX_ST_PTL			0x0004
+#define EMAC_RX_ST_ORE			0x0002
+#define EMAC_RX_ST_IRE			0x0001
+#define EMAC_BAD_RX_PACKET		0x02ff
+#define EMAC_CSUM_VER_ERROR		0x0003
+
+/* identify a bad rx packet dependent on emac features */
+#ifdef CONFIG_IBM_EMAC4
+#define EMAC_IS_BAD_RX_PACKET(desc) \
+	(((desc & (EMAC_BAD_RX_PACKET & ~EMAC_CSUM_VER_ERROR)) || \
+	((desc & EMAC_CSUM_VER_ERROR) == EMAC_RX_ST_ORE) || \
+	((desc & EMAC_CSUM_VER_ERROR) == EMAC_RX_ST_IRE)))
+#else
+#define EMAC_IS_BAD_RX_PACKET(desc) \
+	 (desc & EMAC_BAD_RX_PACKET)
+#endif
+
+/* Revision specific EMAC register defaults */
+#ifdef CONFIG_IBM_EMAC4
+#define EMAC_M1_DEFAULT			(EMAC_M1_BASE | \
+					EMAC_M1_OPB_CLK_83 | \
+					EMAC_M1_TX_MWSW)
+#define EMAC_RMR_DEFAULT		(EMAC_RMR_BASE | \
+					EMAC_RMR_RFAF_128_2048)
+#define EMAC_TMR0_XMIT			(EMAC_TMR0_GNP0 | \
+					EMAC_TMR0_TFAE_128_2048)
+#define EMAC_TRTR_DEFAULT		EMAC_TRTR_1024
+#else				/* !CONFIG_IBM_EMAC4 */
+#define EMAC_M1_DEFAULT			EMAC_M1_BASE
+#define EMAC_RMR_DEFAULT		EMAC_RMR_BASE
+#define EMAC_TMR0_XMIT			EMAC_TMR0_GNP0
+#define EMAC_TRTR_DEFAULT		EMAC_TRTR_1600
+#endif				/* CONFIG_IBM_EMAC4 */
+
+/* SoC implementation specific EMAC register defaults */
+#if defined(CONFIG_440GP)
+#define EMAC_RWMR_DEFAULT		0x80009000
+#define EMAC_TMR0_DEFAULT		0x00000000
+#define EMAC_TMR1_DEFAULT		0xf8640000
+#elif defined(CONFIG_440GX)
+#define EMAC_RWMR_DEFAULT		0x1000a200
+#define EMAC_TMR0_DEFAULT		EMAC_TMR0_TFAE_128_2048
+#define EMAC_TMR1_DEFAULT		0x88810000
+#else
+#define EMAC_RWMR_DEFAULT		0x0f002000
+#define EMAC_TMR0_DEFAULT		0x00000000
+#define EMAC_TMR1_DEFAULT		0x380f0000
+#endif				/* CONFIG_440GP */
+
+#endif

drivers/net/ibm_emac/ibm_emac_core.c

+/*
+ * ibm_emac_core.c
+ *
+ * Ethernet driver for the built in ethernet on the IBM 4xx PowerPC
+ * processors.
+ * 
+ * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
+ * Based on original work by
+ *
+ *      Armin Kuster <akuster@mvista.com>
+ * 	Johnnie Peters <jpeters@mvista.com>
+ *
+ * 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.
+ * TODO
+ *       - Check for races in the "remove" code path
+ *       - Add some Power Management to the MAC and the PHY
+ *       - Audit remaining of non-rewritten code (--BenH)
+ *       - Cleanup message display using msglevel mecanism
+ *       - Address all errata
+ *       - Audit all register update paths to ensure they
+ *         are being written post soft reset if required.
+ */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/ptrace.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dma-mapping.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+
+#include <asm/processor.h>
+#include <asm/bitops.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/ocp.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/crc32.h>
+
+#include "ibm_emac_core.h"
+
+//#define MDIO_DEBUG(fmt) printk fmt
+#define MDIO_DEBUG(fmt)
+
+//#define LINK_DEBUG(fmt) printk fmt
+#define LINK_DEBUG(fmt)
+
+//#define PKT_DEBUG(fmt) printk fmt
+#define PKT_DEBUG(fmt)
+
+#define DRV_NAME        "emac"
+#define DRV_VERSION     "2.0"
+#define DRV_AUTHOR      "Benjamin Herrenschmidt <benh@kernel.crashing.org>"
+#define DRV_DESC        "IBM EMAC Ethernet driver"
+
+/*
+ * When mdio_idx >= 0, contains a list of emac ocp_devs
+ * that have had their initialization deferred until the
+ * common MDIO controller has been initialized.
+ */
+LIST_HEAD(emac_init_list);
+
+MODULE_AUTHOR(DRV_AUTHOR);
+MODULE_DESCRIPTION(DRV_DESC);
+MODULE_LICENSE("GPL");
+
+static int skb_res = SKB_RES;
+module_param(skb_res, int, 0444);
+MODULE_PARM_DESC(skb_res, "Amount of data to reserve on skb buffs\n"
+		 "The 405 handles a misaligned IP header fine but\n"
+		 "this can help if you are routing to a tunnel or a\n"
+		 "device that needs aligned data. 0..2");
+
+#define RGMII_PRIV(ocpdev) ((struct ibm_ocp_rgmii*)ocp_get_drvdata(ocpdev))
+
+static unsigned int rgmii_enable[] =
+    { RGMII_RTBI, RGMII_RGMII, RGMII_TBI, RGMII_GMII };
+
+static unsigned int rgmii_speed_mask[] = { 0,
+	0,
+	RGMII_MII2_SPDMASK,
+	RGMII_MII3_SPDMASK
+};
+
+static unsigned int rgmii_speed100[] = { 0,
+	0,
+	RGMII_MII2_100MB,
+	RGMII_MII3_100MB
+};
+
+static unsigned int rgmii_speed1000[] = { 0,
+	0,
+	RGMII_MII2_1000MB,
+	RGMII_MII3_1000MB
+};
+
+#define ZMII_PRIV(ocpdev) ((struct ibm_ocp_zmii*)ocp_get_drvdata(ocpdev))
+
+static unsigned int zmii_enable[][4] = {
+	{ZMII_SMII0, ZMII_RMII0, ZMII_MII0,
+	 ~(ZMII_MDI1 | ZMII_MDI2 | ZMII_MDI3)},
+	{ZMII_SMII1, ZMII_RMII1, ZMII_MII1,
+	 ~(ZMII_MDI0 | ZMII_MDI2 | ZMII_MDI3)},
+	{ZMII_SMII2, ZMII_RMII2, ZMII_MII2,
+	 ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI3)},
+	{ZMII_SMII3, ZMII_RMII3, ZMII_MII3, ~(ZMII_MDI0 | ZMII_MDI1 | ZMII_MDI2)}
+};
+static unsigned int mdi_enable[] =
+    { ZMII_MDI0, ZMII_MDI1, ZMII_MDI2, ZMII_MDI3 };
+
+static unsigned int zmii_speed = 0x0;
+static unsigned int zmii_speed100[] = { ZMII_MII0_100MB, ZMII_MII1_100MB };
+
+/* Since multiple EMACs share MDIO lines in various ways, we need
+ * to avoid re-using the same PHY ID in cases where the arch didn't
+ * setup precise phy_map entries
+ */
+static u32 busy_phy_map = 0;
+
+/* If EMACs share a common MDIO device, this points to it */
+static struct net_device *mdio_ndev = NULL;
+
+struct emac_def_dev {
+	struct list_head link;
+	struct ocp_device *ocpdev;
+	struct ibm_ocp_mal *mal;
+};
+
+static struct net_device_stats *emac_stats(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	return &fep->stats;
+};
+
+static int
+emac_init_rgmii(struct ocp_device *rgmii_dev, int input, int phy_mode)
+{
+	struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(rgmii_dev);
+	const char *mode_name[] = { "RTBI", "RGMII", "TBI", "GMII" };
+	int mode = -1;
+
+	if (!rgmii) {
+		rgmii = kmalloc(sizeof(struct ibm_ocp_rgmii), GFP_KERNEL);
+
+		if (rgmii == NULL) {
+			printk(KERN_ERR
+			       "rgmii%d: Out of memory allocating RGMII structure!\n",
+			       rgmii_dev->def->index);
+			return -ENOMEM;
+		}
+
+		memset(rgmii, 0, sizeof(*rgmii));
+
+		rgmii->base =
+		    (struct rgmii_regs *)ioremap(rgmii_dev->def->paddr,
+						 sizeof(*rgmii->base));
+		if (rgmii->base == NULL) {
+			printk(KERN_ERR
+			       "rgmii%d: Cannot ioremap bridge registers!\n",
+			       rgmii_dev->def->index);
+
+			kfree(rgmii);
+			return -ENOMEM;
+		}
+		ocp_set_drvdata(rgmii_dev, rgmii);
+	}
+
+	if (phy_mode) {
+		switch (phy_mode) {
+		case PHY_MODE_GMII:
+			mode = GMII;
+			break;
+		case PHY_MODE_TBI:
+			mode = TBI;
+			break;
+		case PHY_MODE_RTBI:
+			mode = RTBI;
+			break;
+		case PHY_MODE_RGMII:
+		default:
+			mode = RGMII;
+		}
+		rgmii->base->fer &= ~RGMII_FER_MASK(input);
+		rgmii->base->fer |= rgmii_enable[mode] << (4 * input);
+	} else {
+		switch ((rgmii->base->fer & RGMII_FER_MASK(input)) >> (4 *
+								       input)) {
+		case RGMII_RTBI:
+			mode = RTBI;
+			break;
+		case RGMII_RGMII:
+			mode = RGMII;
+			break;
+		case RGMII_TBI:
+			mode = TBI;
+			break;
+		case RGMII_GMII:
+			mode = GMII;
+		}
+	}
+
+	/* Set mode to RGMII if nothing valid is detected */
+	if (mode < 0)
+		mode = RGMII;
+
+	printk(KERN_NOTICE "rgmii%d: input %d in %s mode\n",
+	       rgmii_dev->def->index, input, mode_name[mode]);
+
+	rgmii->mode[input] = mode;
+	rgmii->users++;
+
+	return 0;
+}
+
+static void
+emac_rgmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
+{
+	struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
+	unsigned int rgmii_speed;
+
+	rgmii_speed = in_be32(&rgmii->base->ssr);
+
+	rgmii_speed &= ~rgmii_speed_mask[input];
+
+	if (speed == 1000)
+		rgmii_speed |= rgmii_speed1000[input];
+	else if (speed == 100)
+		rgmii_speed |= rgmii_speed100[input];
+
+	out_be32(&rgmii->base->ssr, rgmii_speed);
+}
+
+static void emac_close_rgmii(struct ocp_device *ocpdev)
+{
+	struct ibm_ocp_rgmii *rgmii = RGMII_PRIV(ocpdev);
+	BUG_ON(!rgmii || rgmii->users == 0);
+
+	if (!--rgmii->users) {
+		ocp_set_drvdata(ocpdev, NULL);
+		iounmap((void *)rgmii->base);
+		kfree(rgmii);
+	}
+}
+
+static int emac_init_zmii(struct ocp_device *zmii_dev, int input, int phy_mode)
+{
+	struct ibm_ocp_zmii *zmii = ZMII_PRIV(zmii_dev);
+	const char *mode_name[] = { "SMII", "RMII", "MII" };
+	int mode = -1;
+
+	if (!zmii) {
+		zmii = kmalloc(sizeof(struct ibm_ocp_zmii), GFP_KERNEL);
+		if (zmii == NULL) {
+			printk(KERN_ERR
+			       "zmii%d: Out of memory allocating ZMII structure!\n",
+			       zmii_dev->def->index);
+			return -ENOMEM;
+		}
+		memset(zmii, 0, sizeof(*zmii));
+
+		zmii->base =
+		    (struct zmii_regs *)ioremap(zmii_dev->def->paddr,
+						sizeof(*zmii->base));
+		if (zmii->base == NULL) {
+			printk(KERN_ERR
+			       "zmii%d: Cannot ioremap bridge registers!\n",
+			       zmii_dev->def->index);
+
+			kfree(zmii);
+			return -ENOMEM;
+		}
+		ocp_set_drvdata(zmii_dev, zmii);
+	}
+
+	if (phy_mode) {
+		switch (phy_mode) {
+		case PHY_MODE_MII:
+			mode = MII;
+			break;
+		case PHY_MODE_RMII:
+			mode = RMII;
+			break;
+		case PHY_MODE_SMII:
+		default:
+			mode = SMII;
+		}
+		zmii->base->fer &= ~ZMII_FER_MASK(input);
+		zmii->base->fer |= zmii_enable[input][mode];
+	} else {
+		switch ((zmii->base->fer & ZMII_FER_MASK(input)) << (4 * input)) {
+		case ZMII_MII0:
+			mode = MII;
+			break;
+		case ZMII_RMII0:
+			mode = RMII;
+			break;
+		case ZMII_SMII0:
+			mode = SMII;
+		}
+	}
+
+	/* Set mode to SMII if nothing valid is detected */
+	if (mode < 0)
+		mode = SMII;
+
+	printk(KERN_NOTICE "zmii%d: input %d in %s mode\n",
+	       zmii_dev->def->index, input, mode_name[mode]);
+
+	zmii->mode[input] = mode;
+	zmii->users++;
+
+	return 0;
+}
+
+static void emac_enable_zmii_port(struct ocp_device *ocpdev, int input)
+{
+	u32 mask;
+	struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
+
+	mask = in_be32(&zmii->base->fer);
+	mask &= zmii_enable[input][MDI];	/* turn all non enabled MDI's off */
+	mask |= zmii_enable[input][zmii->mode[input]] | mdi_enable[input];
+	out_be32(&zmii->base->fer, mask);
+}
+
+static void
+emac_zmii_port_speed(struct ocp_device *ocpdev, int input, int speed)
+{
+	struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
+
+	if (speed == 100)
+		zmii_speed |= zmii_speed100[input];
+	else
+		zmii_speed &= ~zmii_speed100[input];
+
+	out_be32(&zmii->base->ssr, zmii_speed);
+}
+
+static void emac_close_zmii(struct ocp_device *ocpdev)
+{
+	struct ibm_ocp_zmii *zmii = ZMII_PRIV(ocpdev);
+	BUG_ON(!zmii || zmii->users == 0);
+
+	if (!--zmii->users) {
+		ocp_set_drvdata(ocpdev, NULL);
+		iounmap((void *)zmii->base);
+		kfree(zmii);
+	}
+}
+
+int emac_phy_read(struct net_device *dev, int mii_id, int reg)
+{
+	uint32_t stacr;
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+
+	MDIO_DEBUG(("%s: phy_read, id: 0x%x, reg: 0x%x\n", dev->name, mii_id,
+		    reg));
+
+	/* Enable proper ZMII port */
+	if (fep->zmii_dev)
+		emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
+
+	/* Use the EMAC that has the MDIO port */
+	if (fep->mdio_dev) {
+		dev = fep->mdio_dev;
+		fep = dev->priv;
+		emacp = fep->emacp;
+	}
+
+	udelay(MDIO_DELAY);
+
+	if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0) {
+		printk(KERN_WARNING "%s: PHY read timeout #1!\n", dev->name);
+		return -1;
+	}
+
+	/* Clear the speed bits and make a read request to the PHY */
+	stacr = ((EMAC_STACR_READ | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
+	stacr |= ((mii_id & 0x1F) << 5);
+
+	out_be32(&emacp->em0stacr, stacr);
+
+	udelay(MDIO_DELAY);
+	stacr = in_be32(&emacp->em0stacr);
+
+	if ((stacr & EMAC_STACR_OC) == 0) {
+		printk(KERN_WARNING "%s: PHY read timeout #2!\n", dev->name);
+		return -1;
+	}
+
+	/* Check for a read error */
+	if (stacr & EMAC_STACR_PHYE) {
+		MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
+		return -1;
+	}
+
+	MDIO_DEBUG((" -> 0x%x\n", stacr >> 16));
+
+	return (stacr >> 16);
+}
+
+void emac_phy_write(struct net_device *dev, int mii_id, int reg, int data)
+{
+	uint32_t stacr;
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+
+	MDIO_DEBUG(("%s phy_write, id: 0x%x, reg: 0x%x, data: 0x%x\n",
+		    dev->name, mii_id, reg, data));
+
+	/* Enable proper ZMII port */
+	if (fep->zmii_dev)
+		emac_enable_zmii_port(fep->zmii_dev, fep->zmii_input);
+
+	/* Use the EMAC that has the MDIO port */
+	if (fep->mdio_dev) {
+		dev = fep->mdio_dev;
+		fep = dev->priv;
+		emacp = fep->emacp;
+	}
+
+	udelay(MDIO_DELAY);
+
+	if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0) {
+		printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
+		return;
+	}
+
+	/* Clear the speed bits and make a read request to the PHY */
+
+	stacr = ((EMAC_STACR_WRITE | (reg & 0x1f)) & ~EMAC_STACR_CLK_100MHZ);
+	stacr |= ((mii_id & 0x1f) << 5) | ((data & 0xffff) << 16);
+
+	out_be32(&emacp->em0stacr, stacr);
+
+	udelay(MDIO_DELAY);
+
+	if ((in_be32(&emacp->em0stacr) & EMAC_STACR_OC) == 0)
+		printk(KERN_WARNING "%s: PHY write timeout #2!\n", dev->name);
+
+	/* Check for a write error */
+	if ((stacr & EMAC_STACR_PHYE) != 0) {
+		MDIO_DEBUG(("EMAC MDIO PHY error !\n"));
+	}
+}
+
+static void emac_txeob_dev(void *param, u32 chanmask)
+{
+	struct net_device *dev = param;
+	struct ocp_enet_private *fep = dev->priv;
+	unsigned long flags;
+
+	spin_lock_irqsave(&fep->lock, flags);
+
+	PKT_DEBUG(("emac_txeob_dev() entry, tx_cnt: %d\n", fep->tx_cnt));
+
+	while (fep->tx_cnt &&
+	       !(fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_READY)) {
+
+		if (fep->tx_desc[fep->ack_slot].ctrl & MAL_TX_CTRL_LAST) {
+			/* Tell the system the transmit completed. */
+			dma_unmap_single(&fep->ocpdev->dev,
+					 fep->tx_desc[fep->ack_slot].data_ptr,
+					 fep->tx_desc[fep->ack_slot].data_len,
+					 DMA_TO_DEVICE);
+			dev_kfree_skb_irq(fep->tx_skb[fep->ack_slot]);
+
+			if (fep->tx_desc[fep->ack_slot].ctrl &
+			    (EMAC_TX_ST_EC | EMAC_TX_ST_MC | EMAC_TX_ST_SC))
+				fep->stats.collisions++;
+		}
+
+		fep->tx_skb[fep->ack_slot] = (struct sk_buff *)NULL;
+		if (++fep->ack_slot == NUM_TX_BUFF)
+			fep->ack_slot = 0;
+
+		fep->tx_cnt--;
+	}
+	if (fep->tx_cnt < NUM_TX_BUFF)
+		netif_wake_queue(dev);
+
+	PKT_DEBUG(("emac_txeob_dev() exit, tx_cnt: %d\n", fep->tx_cnt));
+
+	spin_unlock_irqrestore(&fep->lock, flags);
+}
+
+/*
+  Fill/Re-fill the rx chain with valid ctrl/ptrs.
+  This function will fill from rx_slot up to the parm end.
+  So to completely fill the chain pre-set rx_slot to 0 and
+  pass in an end of 0.
+ */
+static void emac_rx_fill(struct net_device *dev, int end)
+{
+	int i;
+	struct ocp_enet_private *fep = dev->priv;
+
+	i = fep->rx_slot;
+	do {
+		/* We don't want the 16 bytes skb_reserve done by dev_alloc_skb,
+		 * it breaks our cache line alignement. However, we still allocate
+		 * +16 so that we end up allocating the exact same size as
+		 * dev_alloc_skb() would do.
+		 * Also, because of the skb_res, the max DMA size we give to EMAC
+		 * is slighly wrong, causing it to potentially DMA 2 more bytes
+		 * from a broken/oversized packet. These 16 bytes will take care
+		 * that we don't walk on somebody else toes with that.
+		 */
+		fep->rx_skb[i] =
+		    alloc_skb(fep->rx_buffer_size + 16, GFP_ATOMIC);
+
+		if (fep->rx_skb[i] == NULL) {
+			/* Keep rx_slot here, the next time clean/fill is called
+			 * we will try again before the MAL wraps back here
+			 * If the MAL tries to use this descriptor with
+			 * the EMPTY bit off it will cause the
+			 * rxde interrupt.  That is where we will
+			 * try again to allocate an sk_buff.
+			 */
+			break;
+
+		}
+
+		if (skb_res)
+			skb_reserve(fep->rx_skb[i], skb_res);
+
+		/* We must NOT dma_map_single the cache line right after the
+		 * buffer, so we must crop our sync size to account for the
+		 * reserved space
+		 */
+		fep->rx_desc[i].data_ptr =
+		    (unsigned char *)dma_map_single(&fep->ocpdev->dev,
+						    (void *)fep->rx_skb[i]->
+						    data,
+						    fep->rx_buffer_size -
+						    skb_res, DMA_FROM_DEVICE);
+
+		/*
+		 * Some 4xx implementations use the previously
+		 * reserved bits in data_len to encode the MS
+		 * 4-bits of a 36-bit physical address (ERPN)
+		 * This must be initialized.
+		 */
+		fep->rx_desc[i].data_len = 0;
+		fep->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR |
+		    (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0);
+
+	} while ((i = (i + 1) % NUM_RX_BUFF) != end);
+
+	fep->rx_slot = i;
+}
+
+static void
+emac_rx_csum(struct net_device *dev, unsigned short ctrl, struct sk_buff *skb)
+{
+	struct ocp_enet_private *fep = dev->priv;
+
+	/* Exit if interface has no TAH engine */
+	if (!fep->tah_dev) {
+		skb->ip_summed = CHECKSUM_NONE;
+		return;
+	}
+
+	/* Check for TCP/UDP/IP csum error */
+	if (ctrl & EMAC_CSUM_VER_ERROR) {
+		/* Let the stack verify checksum errors */
+		skb->ip_summed = CHECKSUM_NONE;
+/*		adapter->hw_csum_err++; */
+	} else {
+		/* Csum is good */
+		skb->ip_summed = CHECKSUM_UNNECESSARY;
+/*		adapter->hw_csum_good++; */
+	}
+}
+
+static int emac_rx_clean(struct net_device *dev)
+{
+	int i, b, bnum, buf[6];
+	int error, frame_length;
+	struct ocp_enet_private *fep = dev->priv;
+	unsigned short ctrl;
+
+	i = fep->rx_slot;
+
+	PKT_DEBUG(("emac_rx_clean() entry, rx_slot: %d\n", fep->rx_slot));
+
+	do {
+		if (fep->rx_skb[i] == NULL)
+			continue;	/*we have already handled the packet but haved failed to alloc */
+		/* 
+		   since rx_desc is in uncached mem we don't keep reading it directly 
+		   we pull out a local copy of ctrl and do the checks on the copy.
+		 */
+		ctrl = fep->rx_desc[i].ctrl;
+		if (ctrl & MAL_RX_CTRL_EMPTY)
+			break;	/*we don't have any more ready packets */
+
+		if (EMAC_IS_BAD_RX_PACKET(ctrl)) {
+			fep->stats.rx_errors++;
+			fep->stats.rx_dropped++;
+
+			if (ctrl & EMAC_RX_ST_OE)
+				fep->stats.rx_fifo_errors++;
+			if (ctrl & EMAC_RX_ST_AE)
+				fep->stats.rx_frame_errors++;
+			if (ctrl & EMAC_RX_ST_BFCS)
+				fep->stats.rx_crc_errors++;
+			if (ctrl & (EMAC_RX_ST_RP | EMAC_RX_ST_PTL |
+				    EMAC_RX_ST_ORE | EMAC_RX_ST_IRE))
+				fep->stats.rx_length_errors++;
+		} else {
+			if ((ctrl & (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) ==
+			    (MAL_RX_CTRL_FIRST | MAL_RX_CTRL_LAST)) {
+				/* Single descriptor packet */
+				emac_rx_csum(dev, ctrl, fep->rx_skb[i]);
+				/* Send the skb up the chain. */
+				frame_length = fep->rx_desc[i].data_len - 4;
+				skb_put(fep->rx_skb[i], frame_length);
+				fep->rx_skb[i]->dev = dev;
+				fep->rx_skb[i]->protocol =
+				    eth_type_trans(fep->rx_skb[i], dev);
+				error = netif_rx(fep->rx_skb[i]);
+
+				if ((error == NET_RX_DROP) ||
+				    (error == NET_RX_BAD)) {
+					fep->stats.rx_dropped++;
+				} else {
+					fep->stats.rx_packets++;
+					fep->stats.rx_bytes += frame_length;
+				}
+				fep->rx_skb[i] = NULL;
+			} else {
+				/* Multiple descriptor packet */
+				if (ctrl & MAL_RX_CTRL_FIRST) {
+					if (fep->rx_desc[(i + 1) % NUM_RX_BUFF].
+					    ctrl & MAL_RX_CTRL_EMPTY)
+						break;
+					bnum = 0;
+					buf[bnum] = i;
+					++bnum;
+					continue;
+				}
+				if (((ctrl & MAL_RX_CTRL_FIRST) !=
+				     MAL_RX_CTRL_FIRST) &&
+				    ((ctrl & MAL_RX_CTRL_LAST) !=
+				     MAL_RX_CTRL_LAST)) {
+					if (fep->rx_desc[(i + 1) %
+							 NUM_RX_BUFF].ctrl &
+					    MAL_RX_CTRL_EMPTY) {
+						i = buf[0];
+						break;
+					}
+					buf[bnum] = i;
+					++bnum;
+					continue;
+				}
+				if (ctrl & MAL_RX_CTRL_LAST) {
+					buf[bnum] = i;
+					++bnum;
+					skb_put(fep->rx_skb[buf[0]],
+						fep->rx_desc[buf[0]].data_len);
+					for (b = 1; b < bnum; b++) {
+						/*
+						 * MAL is braindead, we need
+						 * to copy the remainder
+						 * of the packet from the
+						 * latter descriptor buffers
+						 * to the first skb. Then
+						 * dispose of the source
+						 * skbs.
+						 *
+						 * Once the stack is fixed
+						 * to handle frags on most
+						 * protocols we can generate
+						 * a fragmented skb with
+						 * no copies.
+						 */
+						memcpy(fep->rx_skb[buf[0]]->
+						       data +
+						       fep->rx_skb[buf[0]]->len,
+						       fep->rx_skb[buf[b]]->
+						       data,
+						       fep->rx_desc[buf[b]].
+						       data_len);
+						skb_put(fep->rx_skb[buf[0]],
+							fep->rx_desc[buf[b]].
+							data_len);
+						dma_unmap_single(&fep->ocpdev->
+								 dev,
+								 fep->
+								 rx_desc[buf
+									 [b]].
+								 data_ptr,
+								 fep->
+								 rx_desc[buf
+									 [b]].
+								 data_len,
+								 DMA_FROM_DEVICE);
+						dev_kfree_skb(fep->
+							      rx_skb[buf[b]]);
+					}
+					emac_rx_csum(dev, ctrl,
+						     fep->rx_skb[buf[0]]);
+
+					fep->rx_skb[buf[0]]->dev = dev;
+					fep->rx_skb[buf[0]]->protocol =
+					    eth_type_trans(fep->rx_skb[buf[0]],
+							   dev);
+					error = netif_rx(fep->rx_skb[buf[0]]);
+
+					if ((error == NET_RX_DROP)
+					    || (error == NET_RX_BAD)) {
+						fep->stats.rx_dropped++;
+					} else {
+						fep->stats.rx_packets++;
+						fep->stats.rx_bytes +=
+						    fep->rx_skb[buf[0]]->len;
+					}
+					for (b = 0; b < bnum; b++)
+						fep->rx_skb[buf[b]] = NULL;
+				}
+			}
+		}
+	} while ((i = (i + 1) % NUM_RX_BUFF) != fep->rx_slot);
+
+	PKT_DEBUG(("emac_rx_clean() exit, rx_slot: %d\n", fep->rx_slot));
+
+	return i;
+}
+
+static void emac_rxeob_dev(void *param, u32 chanmask)
+{
+	struct net_device *dev = param;
+	struct ocp_enet_private *fep = dev->priv;
+	unsigned long flags;
+	int n;
+
+	spin_lock_irqsave(&fep->lock, flags);
+	if ((n = emac_rx_clean(dev)) != fep->rx_slot)
+		emac_rx_fill(dev, n);
+	spin_unlock_irqrestore(&fep->lock, flags);
+}
+
+/*
+ * This interrupt should never occurr, we don't program
+ * the MAL for contiunous mode.
+ */
+static void emac_txde_dev(void *param, u32 chanmask)
+{
+	struct net_device *dev = param;
+	struct ocp_enet_private *fep = dev->priv;
+
+	printk(KERN_WARNING "%s: transmit descriptor error\n", dev->name);
+
+	emac_mac_dump(dev);
+	emac_mal_dump(dev);
+
+	/* Reenable the transmit channel */
+	mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
+}
+
+/*
+ * This interrupt should be very rare at best.  This occurs when
+ * the hardware has a problem with the receive descriptors.  The manual
+ * states that it occurs when the hardware cannot the receive descriptor
+ * empty bit is not set.  The recovery mechanism will be to
+ * traverse through the descriptors, handle any that are marked to be
+ * handled and reinitialize each along the way.  At that point the driver
+ * will be restarted.
+ */
+static void emac_rxde_dev(void *param, u32 chanmask)
+{
+	struct net_device *dev = param;
+	struct ocp_enet_private *fep = dev->priv;
+	unsigned long flags;
+
+	if (net_ratelimit()) {
+		printk(KERN_WARNING "%s: receive descriptor error\n",
+		       fep->ndev->name);
+
+		emac_mac_dump(dev);
+		emac_mal_dump(dev);
+		emac_desc_dump(dev);
+	}
+
+	/* Disable RX channel */
+	spin_lock_irqsave(&fep->lock, flags);
+	mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+
+	/* For now, charge the error against all emacs */
+	fep->stats.rx_errors++;
+
+	/* so do we have any good packets still? */
+	emac_rx_clean(dev);
+
+	/* When the interface is restarted it resets processing to the
+	 *  first descriptor in the table.
+	 */
+
+	fep->rx_slot = 0;
+	emac_rx_fill(dev, 0);
+
+	set_mal_dcrn(fep->mal, DCRN_MALRXEOBISR, fep->commac.rx_chan_mask);
+	set_mal_dcrn(fep->mal, DCRN_MALRXDEIR, fep->commac.rx_chan_mask);
+
+	/* Reenable the receive channels */
+	mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+	spin_unlock_irqrestore(&fep->lock, flags);
+}
+
+static irqreturn_t
+emac_mac_irq(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct net_device *dev = dev_instance;
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+	unsigned long tmp_em0isr;
+
+	/* EMAC interrupt */
+	tmp_em0isr = in_be32(&emacp->em0isr);
+	if (tmp_em0isr & (EMAC_ISR_TE0 | EMAC_ISR_TE1)) {
+		/* This error is a hard transmit error - could retransmit */
+		fep->stats.tx_errors++;
+
+		/* Reenable the transmit channel */
+		mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
+
+	} else {
+		fep->stats.rx_errors++;
+	}
+
+	if (tmp_em0isr & EMAC_ISR_RP)
+		fep->stats.rx_length_errors++;
+	if (tmp_em0isr & EMAC_ISR_ALE)
+		fep->stats.rx_frame_errors++;
+	if (tmp_em0isr & EMAC_ISR_BFCS)
+		fep->stats.rx_crc_errors++;
+	if (tmp_em0isr & EMAC_ISR_PTLE)
+		fep->stats.rx_length_errors++;
+	if (tmp_em0isr & EMAC_ISR_ORE)
+		fep->stats.rx_length_errors++;
+	if (tmp_em0isr & EMAC_ISR_TE0)
+		fep->stats.tx_aborted_errors++;
+
+	emac_err_dump(dev, tmp_em0isr);
+
+	out_be32(&emacp->em0isr, tmp_em0isr);
+
+	return IRQ_HANDLED;
+}
+
+static int emac_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	unsigned short ctrl;
+	unsigned long flags;
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+	int len = skb->len;
+	unsigned int offset = 0, size, f, tx_slot_first;
+	unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
+
+	spin_lock_irqsave(&fep->lock, flags);
+
+	len -= skb->data_len;
+
+	if ((fep->tx_cnt + nr_frags + len / DESC_BUF_SIZE + 1) > NUM_TX_BUFF) {
+		PKT_DEBUG(("emac_start_xmit() stopping queue\n"));
+		netif_stop_queue(dev);
+		spin_unlock_irqrestore(&fep->lock, flags);
+		restore_flags(flags);
+		return -EBUSY;
+	}
+
+	tx_slot_first = fep->tx_slot;
+
+	while (len) {
+		size = min(len, DESC_BUF_SIZE);
+
+		fep->tx_desc[fep->tx_slot].data_len = (short)size;
+		fep->tx_desc[fep->tx_slot].data_ptr =
+		    (unsigned char *)dma_map_single(&fep->ocpdev->dev,
+						    (void *)((unsigned int)skb->
+							     data + offset),
+						    size, DMA_TO_DEVICE);
+
+		ctrl = EMAC_TX_CTRL_DFLT;
+		if (fep->tx_slot != tx_slot_first)
+			ctrl |= MAL_TX_CTRL_READY;
+		if ((NUM_TX_BUFF - 1) == fep->tx_slot)
+			ctrl |= MAL_TX_CTRL_WRAP;
+		if (!nr_frags && (len == size)) {
+			ctrl |= MAL_TX_CTRL_LAST;
+			fep->tx_skb[fep->tx_slot] = skb;
+		}
+		if (skb->ip_summed == CHECKSUM_HW)
+			ctrl |= EMAC_TX_CTRL_TAH_CSUM;
+
+		fep->tx_desc[fep->tx_slot].ctrl = ctrl;
+
+		len -= size;
+		offset += size;
+
+		/* Bump tx count */
+		if (++fep->tx_cnt == NUM_TX_BUFF)
+			netif_stop_queue(dev);
+
+		/* Next descriptor */
+		if (++fep->tx_slot == NUM_TX_BUFF)
+			fep->tx_slot = 0;
+	}
+
+	for (f = 0; f < nr_frags; f++) {
+		struct skb_frag_struct *frag;
+
+		frag = &skb_shinfo(skb)->frags[f];
+		len = frag->size;
+		offset = 0;
+
+		while (len) {
+			size = min(len, DESC_BUF_SIZE);
+
+			dma_map_page(&fep->ocpdev->dev,
+				     frag->page,
+				     frag->page_offset + offset,
+				     size, DMA_TO_DEVICE);
+
+			ctrl = EMAC_TX_CTRL_DFLT | MAL_TX_CTRL_READY;
+			if ((NUM_TX_BUFF - 1) == fep->tx_slot)
+				ctrl |= MAL_TX_CTRL_WRAP;
+			if ((f == (nr_frags - 1)) && (len == size)) {
+				ctrl |= MAL_TX_CTRL_LAST;
+				fep->tx_skb[fep->tx_slot] = skb;
+			}
+
+			if (skb->ip_summed == CHECKSUM_HW)
+				ctrl |= EMAC_TX_CTRL_TAH_CSUM;
+
+			fep->tx_desc[fep->tx_slot].data_len = (short)size;
+			fep->tx_desc[fep->tx_slot].data_ptr =
+			    (char *)((page_to_pfn(frag->page) << PAGE_SHIFT) +
+				     frag->page_offset + offset);
+			fep->tx_desc[fep->tx_slot].ctrl = ctrl;
+
+			len -= size;
+			offset += size;
+
+			/* Bump tx count */
+			if (++fep->tx_cnt == NUM_TX_BUFF)
+				netif_stop_queue(dev);
+
+			/* Next descriptor */
+			if (++fep->tx_slot == NUM_TX_BUFF)
+				fep->tx_slot = 0;
+		}
+	}
+
+	/*
+	 * Deferred set READY on first descriptor of packet to
+	 * avoid TX MAL race.
+	 */
+	fep->tx_desc[tx_slot_first].ctrl |= MAL_TX_CTRL_READY;
+
+	/* Send the packet out. */
+	out_be32(&emacp->em0tmr0, EMAC_TMR0_XMIT);
+
+	fep->stats.tx_packets++;
+	fep->stats.tx_bytes += skb->len;
+
+	PKT_DEBUG(("emac_start_xmit() exitn"));
+
+	spin_unlock_irqrestore(&fep->lock, flags);
+
+	return 0;
+}
+
+static int emac_adjust_to_link(struct ocp_enet_private *fep)
+{
+	emac_t *emacp = fep->emacp;
+	struct ibm_ocp_rgmii *rgmii;
+	unsigned long mode_reg;
+	int full_duplex, speed;
+
+	full_duplex = 0;
+	speed = SPEED_10;
+
+	/* set mode register 1 defaults */
+	mode_reg = EMAC_M1_DEFAULT;
+
+	/* Read link mode on PHY */
+	if (fep->phy_mii.def->ops->read_link(&fep->phy_mii) == 0) {
+		/* If an error occurred, we don't deal with it yet */
+		full_duplex = (fep->phy_mii.duplex == DUPLEX_FULL);
+		speed = fep->phy_mii.speed;
+	}
+
+	if (fep->rgmii_dev)
+		rgmii = RGMII_PRIV(fep->rgmii_dev);
+
+	/* set speed (default is 10Mb) */
+	switch (speed) {
+	case SPEED_1000:
+		mode_reg |= EMAC_M1_JUMBO_ENABLE | EMAC_M1_RFS_16K;
+		if ((rgmii->mode[fep->rgmii_input] == RTBI)
+		    || (rgmii->mode[fep->rgmii_input] == TBI))
+			mode_reg |= EMAC_M1_MF_1000GPCS;
+		else
+			mode_reg |= EMAC_M1_MF_1000MBPS;
+		if (fep->rgmii_dev)
+			emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
+					      1000);
+		break;
+	case SPEED_100:
+		mode_reg |= EMAC_M1_MF_100MBPS | EMAC_M1_RFS_4K;
+		if (fep->rgmii_dev)
+			emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
+					      100);
+		if (fep->zmii_dev)
+			emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
+					     100);
+		break;
+	case SPEED_10:
+	default:
+		mode_reg = (mode_reg & ~EMAC_M1_MF_100MBPS) | EMAC_M1_RFS_4K;
+		if (fep->rgmii_dev)
+			emac_rgmii_port_speed(fep->rgmii_dev, fep->rgmii_input,
+					      10);
+		if (fep->zmii_dev)
+			emac_zmii_port_speed(fep->zmii_dev, fep->zmii_input,
+					     10);
+	}
+
+	if (full_duplex)
+		mode_reg |= EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_IST;
+	else
+		mode_reg &= ~(EMAC_M1_FDE | EMAC_M1_EIFC | EMAC_M1_ILE);
+
+	LINK_DEBUG(("%s: adjust to link, speed: %d, duplex: %d, opened: %d\n",
+		    fep->ndev->name, speed, full_duplex, fep->opened));
+
+	printk(KERN_INFO "%s: Speed: %d, %s duplex.\n",
+	       fep->ndev->name, speed, full_duplex ? "Full" : "Half");
+	if (fep->opened)
+		out_be32(&emacp->em0mr1, mode_reg);
+
+	return 0;
+}
+
+static int emac_set_mac_address(struct net_device *ndev, void *p)
+{
+	struct ocp_enet_private *fep = ndev->priv;
+	emac_t *emacp = fep->emacp;
+	struct sockaddr *addr = p;
+
+	if (!is_valid_ether_addr(addr->sa_data))
+		return -EADDRNOTAVAIL;
+
+	memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
+
+	/* set the high address */
+	out_be32(&emacp->em0iahr,
+		 (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
+
+	/* set the low address */
+	out_be32(&emacp->em0ialr,
+		 (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
+		 | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
+
+	return 0;
+}
+
+static int emac_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	int old_mtu = dev->mtu;
+	emac_t *emacp = fep->emacp;
+	u32 em0mr0;
+	int i, full;
+	unsigned long flags;
+
+	if ((new_mtu < EMAC_MIN_MTU) || (new_mtu > EMAC_MAX_MTU)) {
+		printk(KERN_ERR
+		       "emac: Invalid MTU setting, MTU must be between %d and %d\n",
+		       EMAC_MIN_MTU, EMAC_MAX_MTU);
+		return -EINVAL;
+	}
+
+	if (old_mtu != new_mtu && netif_running(dev)) {
+		/* Stop rx engine */
+		em0mr0 = in_be32(&emacp->em0mr0);
+		out_be32(&emacp->em0mr0, em0mr0 & ~EMAC_M0_RXE);
+
+		/* Wait for descriptors to be empty */
+		do {
+			full = 0;
+			for (i = 0; i < NUM_RX_BUFF; i++)
+				if (!(fep->rx_desc[i].ctrl & MAL_RX_CTRL_EMPTY)) {
+					printk(KERN_NOTICE
+					       "emac: RX ring is still full\n");
+					full = 1;
+				}
+		} while (full);
+
+		spin_lock_irqsave(&fep->lock, flags);
+
+		mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+
+		/* Destroy all old rx skbs */
+		for (i = 0; i < NUM_RX_BUFF; i++) {
+			dma_unmap_single(&fep->ocpdev->dev,
+					 fep->rx_desc[i].data_ptr,
+					 fep->rx_desc[i].data_len,
+					 DMA_FROM_DEVICE);
+			dev_kfree_skb(fep->rx_skb[i]);
+			fep->rx_skb[i] = NULL;
+		}
+
+		/* Set new rx_buffer_size and advertise new mtu */
+		fep->rx_buffer_size =
+		    new_mtu + ENET_HEADER_SIZE + ENET_FCS_SIZE;
+		dev->mtu = new_mtu;
+
+		/* Re-init rx skbs */
+		fep->rx_slot = 0;
+		emac_rx_fill(dev, 0);
+
+		/* Restart the rx engine */
+		mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+		out_be32(&emacp->em0mr0, em0mr0 | EMAC_M0_RXE);
+
+		spin_unlock_irqrestore(&fep->lock, flags);
+	}
+
+	return 0;
+}
+
+static void __emac_set_multicast_list(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+	u32 rmr = in_be32(&emacp->em0rmr);
+
+	/* First clear all special bits, they can be set later */
+	rmr &= ~(EMAC_RMR_PME | EMAC_RMR_PMME | EMAC_RMR_MAE);
+
+	if (dev->flags & IFF_PROMISC) {
+		rmr |= EMAC_RMR_PME;
+	} else if (dev->flags & IFF_ALLMULTI || 32 < dev->mc_count) {
+		/*
+		 * Must be setting up to use multicast
+		 * Now check for promiscuous multicast
+		 */
+		rmr |= EMAC_RMR_PMME;
+	} else if (dev->flags & IFF_MULTICAST && 0 < dev->mc_count) {
+		unsigned short em0gaht[4] = { 0, 0, 0, 0 };
+		struct dev_mc_list *dmi;
+
+		/* Need to hash on the multicast address. */
+		for (dmi = dev->mc_list; dmi; dmi = dmi->next) {
+			unsigned long mc_crc;
+			unsigned int bit_number;
+
+			mc_crc = ether_crc(6, (char *)dmi->dmi_addr);
+			bit_number = 63 - (mc_crc >> 26);	/* MSB: 0 LSB: 63 */
+			em0gaht[bit_number >> 4] |=
+			    0x8000 >> (bit_number & 0x0f);
+		}
+		emacp->em0gaht1 = em0gaht[0];
+		emacp->em0gaht2 = em0gaht[1];
+		emacp->em0gaht3 = em0gaht[2];
+		emacp->em0gaht4 = em0gaht[3];
+
+		/* Turn on multicast addressing */
+		rmr |= EMAC_RMR_MAE;
+	}
+	out_be32(&emacp->em0rmr, rmr);
+}
+
+static int emac_init_tah(struct ocp_enet_private *fep)
+{
+	tah_t *tahp;
+
+	/* Initialize TAH and enable checksum verification */
+	tahp = (tah_t *) ioremap(fep->tah_dev->def->paddr, sizeof(*tahp));
+
+	if (tahp == NULL) {
+		printk(KERN_ERR "tah%d: Cannot ioremap TAH registers!\n",
+		       fep->tah_dev->def->index);
+
+		return -ENOMEM;
+	}
+
+	out_be32(&tahp->tah_mr, TAH_MR_SR);
+
+	/* wait for reset to complete */
+	while (in_be32(&tahp->tah_mr) & TAH_MR_SR) ;
+
+	/* 10KB TAH TX FIFO accomodates the max MTU of 9000 */
+	out_be32(&tahp->tah_mr,
+		 TAH_MR_CVR | TAH_MR_ST_768 | TAH_MR_TFS_10KB | TAH_MR_DTFP |
+		 TAH_MR_DIG);
+
+	iounmap(&tahp);
+
+	return 0;
+}
+
+static void emac_init_rings(struct net_device *dev)
+{
+	struct ocp_enet_private *ep = dev->priv;
+	int loop;
+
+	ep->tx_desc = (struct mal_descriptor *)((char *)ep->mal->tx_virt_addr +
+						(ep->mal_tx_chan *
+						 MAL_DT_ALIGN));
+	ep->rx_desc =
+	    (struct mal_descriptor *)((char *)ep->mal->rx_virt_addr +
+				      (ep->mal_rx_chan * MAL_DT_ALIGN));
+
+	/* Fill in the transmit descriptor ring. */
+	for (loop = 0; loop < NUM_TX_BUFF; loop++) {
+		if (ep->tx_skb[loop]) {
+			dma_unmap_single(&ep->ocpdev->dev,
+					 ep->tx_desc[loop].data_ptr,
+					 ep->tx_desc[loop].data_len,
+					 DMA_TO_DEVICE);
+			dev_kfree_skb_irq(ep->tx_skb[loop]);
+		}
+		ep->tx_skb[loop] = NULL;
+		ep->tx_desc[loop].ctrl = 0;
+		ep->tx_desc[loop].data_len = 0;
+		ep->tx_desc[loop].data_ptr = NULL;
+	}
+	ep->tx_desc[loop - 1].ctrl |= MAL_TX_CTRL_WRAP;
+
+	/* Format the receive descriptor ring. */
+	ep->rx_slot = 0;
+	/* Default is MTU=1500 + Ethernet overhead */
+	ep->rx_buffer_size = ENET_DEF_BUF_SIZE;
+	emac_rx_fill(dev, 0);
+	if (ep->rx_slot != 0) {
+		printk(KERN_ERR
+		       "%s: Not enough mem for RxChain durning Open?\n",
+		       dev->name);
+		/*We couldn't fill the ring at startup?
+		 *We could clean up and fail to open but right now we will try to
+		 *carry on. It may be a sign of a bad NUM_RX_BUFF value
+		 */
+	}
+
+	ep->tx_cnt = 0;
+	ep->tx_slot = 0;
+	ep->ack_slot = 0;
+}
+
+static void emac_reset_configure(struct ocp_enet_private *fep)
+{
+	emac_t *emacp = fep->emacp;
+	int i;
+
+	mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
+	mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+
+	/*
+	 * Check for a link, some PHYs don't provide a clock if
+	 * no link is present.  Some EMACs will not come out of
+	 * soft reset without a PHY clock present.
+	 */
+	if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
+		/* Reset the EMAC */
+		out_be32(&emacp->em0mr0, EMAC_M0_SRST);
+		udelay(20);
+		for (i = 0; i < 100; i++) {
+			if ((in_be32(&emacp->em0mr0) & EMAC_M0_SRST) == 0)
+				break;
+			udelay(10);
+		}
+
+		if (i >= 100) {
+			printk(KERN_ERR "%s: Cannot reset EMAC\n",
+			       fep->ndev->name);
+			return;
+		}
+	}
+
+	/* Switch IRQs off for now */
+	out_be32(&emacp->em0iser, 0);
+
+	/* Configure MAL rx channel */
+	mal_set_rcbs(fep->mal, fep->mal_rx_chan, DESC_BUF_SIZE_REG);
+
+	/* set the high address */
+	out_be32(&emacp->em0iahr,
+		 (fep->ndev->dev_addr[0] << 8) | fep->ndev->dev_addr[1]);
+
+	/* set the low address */
+	out_be32(&emacp->em0ialr,
+		 (fep->ndev->dev_addr[2] << 24) | (fep->ndev->dev_addr[3] << 16)
+		 | (fep->ndev->dev_addr[4] << 8) | fep->ndev->dev_addr[5]);
+
+	/* Adjust to link */
+	if (netif_carrier_ok(fep->ndev))
+		emac_adjust_to_link(fep);
+
+	/* enable broadcast/individual address and RX FIFO defaults */
+	out_be32(&emacp->em0rmr, EMAC_RMR_DEFAULT);
+
+	/* set transmit request threshold register */
+	out_be32(&emacp->em0trtr, EMAC_TRTR_DEFAULT);
+
+	/* Reconfigure multicast */
+	__emac_set_multicast_list(fep->ndev);
+
+	/* Set receiver/transmitter defaults */
+	out_be32(&emacp->em0rwmr, EMAC_RWMR_DEFAULT);
+	out_be32(&emacp->em0tmr0, EMAC_TMR0_DEFAULT);
+	out_be32(&emacp->em0tmr1, EMAC_TMR1_DEFAULT);
+
+	/* set frame gap */
+	out_be32(&emacp->em0ipgvr, CONFIG_IBM_EMAC_FGAP);
+
+	/* Init ring buffers */
+	emac_init_rings(fep->ndev);
+}
+
+static void emac_kick(struct ocp_enet_private *fep)
+{
+	emac_t *emacp = fep->emacp;
+	unsigned long emac_ier;
+
+	emac_ier = EMAC_ISR_PP | EMAC_ISR_BP | EMAC_ISR_RP |
+	    EMAC_ISR_SE | EMAC_ISR_PTLE | EMAC_ISR_ALE |
+	    EMAC_ISR_BFCS | EMAC_ISR_ORE | EMAC_ISR_IRE;
+
+	out_be32(&emacp->em0iser, emac_ier);
+
+	/* enable all MAL transmit and receive channels */
+	mal_enable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
+	mal_enable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+
+	/* set transmit and receive enable */
+	out_be32(&emacp->em0mr0, EMAC_M0_TXE | EMAC_M0_RXE);
+}
+
+static void
+emac_start_link(struct ocp_enet_private *fep, struct ethtool_cmd *ep)
+{
+	u32 advertise;
+	int autoneg;
+	int forced_speed;
+	int forced_duplex;
+
+	/* Default advertise */
+	advertise = ADVERTISED_10baseT_Half | ADVERTISED_10baseT_Full |
+	    ADVERTISED_100baseT_Half | ADVERTISED_100baseT_Full |
+	    ADVERTISED_1000baseT_Half | ADVERTISED_1000baseT_Full;
+	autoneg = fep->want_autoneg;
+	forced_speed = fep->phy_mii.speed;
+	forced_duplex = fep->phy_mii.duplex;
+
+	/* Setup link parameters */
+	if (ep) {
+		if (ep->autoneg == AUTONEG_ENABLE) {
+			advertise = ep->advertising;
+			autoneg = 1;
+		} else {
+			autoneg = 0;
+			forced_speed = ep->speed;
+			forced_duplex = ep->duplex;
+		}
+	}
+
+	/* Configure PHY & start aneg */
+	fep->want_autoneg = autoneg;
+	if (autoneg) {
+		LINK_DEBUG(("%s: start link aneg, advertise: 0x%x\n",
+			    fep->ndev->name, advertise));
+		fep->phy_mii.def->ops->setup_aneg(&fep->phy_mii, advertise);
+	} else {
+		LINK_DEBUG(("%s: start link forced, speed: %d, duplex: %d\n",
+			    fep->ndev->name, forced_speed, forced_duplex));
+		fep->phy_mii.def->ops->setup_forced(&fep->phy_mii, forced_speed,
+						    forced_duplex);
+	}
+	fep->timer_ticks = 0;
+	mod_timer(&fep->link_timer, jiffies + HZ);
+}
+
+static void emac_link_timer(unsigned long data)
+{
+	struct ocp_enet_private *fep = (struct ocp_enet_private *)data;
+	int link;
+
+	if (fep->going_away)
+		return;
+
+	spin_lock_irq(&fep->lock);
+
+	link = fep->phy_mii.def->ops->poll_link(&fep->phy_mii);
+	LINK_DEBUG(("%s: poll_link: %d\n", fep->ndev->name, link));
+
+	if (link == netif_carrier_ok(fep->ndev)) {
+		if (!link && fep->want_autoneg && (++fep->timer_ticks) > 10)
+			emac_start_link(fep, NULL);
+		goto out;
+	}
+	printk(KERN_INFO "%s: Link is %s\n", fep->ndev->name,
+	       link ? "Up" : "Down");
+	if (link) {
+		netif_carrier_on(fep->ndev);
+		/* Chip needs a full reset on config change. That sucks, so I
+		 * should ultimately move that to some tasklet to limit
+		 * latency peaks caused by this code
+		 */
+		emac_reset_configure(fep);
+		if (fep->opened)
+			emac_kick(fep);
+	} else {
+		fep->timer_ticks = 0;
+		netif_carrier_off(fep->ndev);
+	}
+      out:
+	mod_timer(&fep->link_timer, jiffies + HZ);
+	spin_unlock_irq(&fep->lock);
+}
+
+static void emac_set_multicast_list(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+
+	spin_lock_irq(&fep->lock);
+	__emac_set_multicast_list(dev);
+	spin_unlock_irq(&fep->lock);
+}
+
+static int emac_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+	struct ocp_enet_private *fep = ndev->priv;
+
+	cmd->supported = fep->phy_mii.def->features;
+	cmd->port = PORT_MII;
+	cmd->transceiver = XCVR_EXTERNAL;
+	cmd->phy_address = fep->mii_phy_addr;
+	spin_lock_irq(&fep->lock);
+	cmd->autoneg = fep->want_autoneg;
+	cmd->speed = fep->phy_mii.speed;
+	cmd->duplex = fep->phy_mii.duplex;
+	spin_unlock_irq(&fep->lock);
+	return 0;
+}
+
+static int emac_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+	struct ocp_enet_private *fep = ndev->priv;
+	unsigned long features = fep->phy_mii.def->features;
+
+	if (!capable(CAP_NET_ADMIN))
+		return -EPERM;
+
+	if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE)
+		return -EINVAL;
+	if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0)
+		return -EINVAL;
+	if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL)
+		return -EINVAL;
+	if (cmd->autoneg == AUTONEG_DISABLE)
+		switch (cmd->speed) {
+		case SPEED_10:
+			if (cmd->duplex == DUPLEX_HALF &&
+			    (features & SUPPORTED_10baseT_Half) == 0)
+				return -EINVAL;
+			if (cmd->duplex == DUPLEX_FULL &&
+			    (features & SUPPORTED_10baseT_Full) == 0)
+				return -EINVAL;
+			break;
+		case SPEED_100:
+			if (cmd->duplex == DUPLEX_HALF &&
+			    (features & SUPPORTED_100baseT_Half) == 0)
+				return -EINVAL;
+			if (cmd->duplex == DUPLEX_FULL &&
+			    (features & SUPPORTED_100baseT_Full) == 0)
+				return -EINVAL;
+			break;
+		case SPEED_1000:
+			if (cmd->duplex == DUPLEX_HALF &&
+			    (features & SUPPORTED_1000baseT_Half) == 0)
+				return -EINVAL;
+			if (cmd->duplex == DUPLEX_FULL &&
+			    (features & SUPPORTED_1000baseT_Full) == 0)
+				return -EINVAL;
+			break;
+		default:
+			return -EINVAL;
+	} else if ((features & SUPPORTED_Autoneg) == 0)
+		return -EINVAL;
+	spin_lock_irq(&fep->lock);
+	emac_start_link(fep, cmd);
+	spin_unlock_irq(&fep->lock);
+	return 0;
+}
+
+static void
+emac_get_drvinfo(struct net_device *ndev, struct ethtool_drvinfo *info)
+{
+	struct ocp_enet_private *fep = ndev->priv;
+
+	strcpy(info->driver, DRV_NAME);
+	strcpy(info->version, DRV_VERSION);
+	info->fw_version[0] = '\0';
+	sprintf(info->bus_info, "IBM EMAC %d", fep->ocpdev->def->index);
+	info->regdump_len = 0;
+}
+
+static int emac_nway_reset(struct net_device *ndev)
+{
+	struct ocp_enet_private *fep = ndev->priv;
+
+	if (!fep->want_autoneg)
+		return -EINVAL;
+	spin_lock_irq(&fep->lock);
+	emac_start_link(fep, NULL);
+	spin_unlock_irq(&fep->lock);
+	return 0;
+}
+
+static u32 emac_get_link(struct net_device *ndev)
+{
+	return netif_carrier_ok(ndev);
+}
+
+static struct ethtool_ops emac_ethtool_ops = {
+	.get_settings = emac_get_settings,
+	.set_settings = emac_set_settings,
+	.get_drvinfo = emac_get_drvinfo,
+	.nway_reset = emac_nway_reset,
+	.get_link = emac_get_link
+};
+
+static int emac_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	uint *data = (uint *) & rq->ifr_data;
+
+	switch (cmd) {
+	case SIOCGMIIPHY:
+		data[0] = fep->mii_phy_addr;
+		/* Fall through */
+	case SIOCGMIIREG:
+		data[3] = emac_phy_read(dev, fep->mii_phy_addr, data[1]);
+		return 0;
+	case SIOCSMIIREG:
+		if (!capable(CAP_NET_ADMIN))
+			return -EPERM;
+
+		emac_phy_write(dev, fep->mii_phy_addr, data[1], data[2]);
+		return 0;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static int emac_open(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	int rc;
+
+	spin_lock_irq(&fep->lock);
+
+	fep->opened = 1;
+	netif_carrier_off(dev);
+
+	/* Reset & configure the chip */
+	emac_reset_configure(fep);
+
+	spin_unlock_irq(&fep->lock);
+
+	/* Request our interrupt lines */
+	rc = request_irq(dev->irq, emac_mac_irq, 0, "IBM EMAC MAC", dev);
+	if (rc != 0) {
+		printk("dev->irq %d failed\n", dev->irq);
+		goto bail;
+	}
+	/* Kick the chip rx & tx channels into life */
+	spin_lock_irq(&fep->lock);
+	emac_kick(fep);
+	spin_unlock_irq(&fep->lock);
+
+	netif_start_queue(dev);
+      bail:
+	return rc;
+}
+
+static int emac_close(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	emac_t *emacp = fep->emacp;
+
+	/* XXX Stop IRQ emitting here */
+	spin_lock_irq(&fep->lock);
+	fep->opened = 0;
+	mal_disable_tx_channels(fep->mal, fep->commac.tx_chan_mask);
+	mal_disable_rx_channels(fep->mal, fep->commac.rx_chan_mask);
+	netif_carrier_off(dev);
+	netif_stop_queue(dev);
+
+	/*
+	 * Check for a link, some PHYs don't provide a clock if
+	 * no link is present.  Some EMACs will not come out of
+	 * soft reset without a PHY clock present.
+	 */
+	if (fep->phy_mii.def->ops->poll_link(&fep->phy_mii)) {
+		out_be32(&emacp->em0mr0, EMAC_M0_SRST);
+		udelay(10);
+
+		if (emacp->em0mr0 & EMAC_M0_SRST) {
+			/*not sure what to do here hopefully it clears before another open */
+			printk(KERN_ERR
+			       "%s: Phy SoftReset didn't clear, no link?\n",
+			       dev->name);
+		}
+	}
+
+	/* Free the irq's */
+	free_irq(dev->irq, dev);
+
+	spin_unlock_irq(&fep->lock);
+
+	return 0;
+}
+
+static void emac_remove(struct ocp_device *ocpdev)
+{
+	struct net_device *dev = ocp_get_drvdata(ocpdev);
+	struct ocp_enet_private *ep = dev->priv;
+
+	/* FIXME: locking, races, ... */
+	ep->going_away = 1;
+	ocp_set_drvdata(ocpdev, NULL);
+	if (ep->rgmii_dev)
+		emac_close_rgmii(ep->rgmii_dev);
+	if (ep->zmii_dev)
+		emac_close_zmii(ep->zmii_dev);
+
+	unregister_netdev(dev);
+	del_timer_sync(&ep->link_timer);
+	mal_unregister_commac(ep->mal, &ep->commac);
+	iounmap((void *)ep->emacp);
+	kfree(dev);
+}
+
+struct mal_commac_ops emac_commac_ops = {
+	.txeob = &emac_txeob_dev,
+	.txde = &emac_txde_dev,
+	.rxeob = &emac_rxeob_dev,
+	.rxde = &emac_rxde_dev,
+};
+
+static int emac_init_device(struct ocp_device *ocpdev, struct ibm_ocp_mal *mal)
+{
+	int deferred_init = 0;
+	int rc = 0, i;
+	struct net_device *ndev;
+	struct ocp_enet_private *ep;
+	struct ocp_func_emac_data *emacdata;
+	int commac_reg = 0;
+	u32 phy_map;
+
+	emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
+	if (!emacdata) {
+		printk(KERN_ERR "emac%d: Missing additional data!\n",
+		       ocpdev->def->index);
+		return -ENODEV;
+	}
+
+	/* Allocate our net_device structure */
+	ndev = alloc_etherdev(sizeof(struct ocp_enet_private));
+	if (ndev == NULL) {
+		printk(KERN_ERR
+		       "emac%d: Could not allocate ethernet device.\n",
+		       ocpdev->def->index);
+		return -ENOMEM;
+	}
+	ep = ndev->priv;
+	ep->ndev = ndev;
+	ep->ocpdev = ocpdev;
+	ndev->irq = ocpdev->def->irq;
+	ep->wol_irq = emacdata->wol_irq;
+	if (emacdata->mdio_idx >= 0) {
+		if (emacdata->mdio_idx == ocpdev->def->index) {
+			/* Set the common MDIO net_device */
+			mdio_ndev = ndev;
+			deferred_init = 1;
+		}
+		ep->mdio_dev = mdio_ndev;
+	} else {
+		ep->mdio_dev = ndev;
+	}
+
+	ocp_set_drvdata(ocpdev, ndev);
+
+	spin_lock_init(&ep->lock);
+
+	/* Fill out MAL informations and register commac */
+	ep->mal = mal;
+	ep->mal_tx_chan = emacdata->mal_tx_chan;
+	ep->mal_rx_chan = emacdata->mal_rx_chan;
+	ep->commac.ops = &emac_commac_ops;
+	ep->commac.dev = ndev;
+	ep->commac.tx_chan_mask = MAL_CHAN_MASK(ep->mal_tx_chan);
+	ep->commac.rx_chan_mask = MAL_CHAN_MASK(ep->mal_rx_chan);
+	rc = mal_register_commac(ep->mal, &ep->commac);
+	if (rc != 0)
+		goto bail;
+	commac_reg = 1;
+
+	/* Map our MMIOs */
+	ep->emacp = (emac_t *) ioremap(ocpdev->def->paddr, sizeof(emac_t));
+
+	/* Check if we need to attach to a ZMII */
+	if (emacdata->zmii_idx >= 0) {
+		ep->zmii_input = emacdata->zmii_mux;
+		ep->zmii_dev =
+		    ocp_find_device(OCP_ANY_ID, OCP_FUNC_ZMII,
+				    emacdata->zmii_idx);
+		if (ep->zmii_dev == NULL)
+			printk(KERN_WARNING
+			       "emac%d: ZMII %d requested but not found !\n",
+			       ocpdev->def->index, emacdata->zmii_idx);
+		else if ((rc =
+			  emac_init_zmii(ep->zmii_dev, ep->zmii_input,
+					 emacdata->phy_mode)) != 0)
+			goto bail;
+	}
+
+	/* Check if we need to attach to a RGMII */
+	if (emacdata->rgmii_idx >= 0) {
+		ep->rgmii_input = emacdata->rgmii_mux;
+		ep->rgmii_dev =
+		    ocp_find_device(OCP_ANY_ID, OCP_FUNC_RGMII,
+				    emacdata->rgmii_idx);
+		if (ep->rgmii_dev == NULL)
+			printk(KERN_WARNING
+			       "emac%d: RGMII %d requested but not found !\n",
+			       ocpdev->def->index, emacdata->rgmii_idx);
+		else if ((rc =
+			  emac_init_rgmii(ep->rgmii_dev, ep->rgmii_input,
+					  emacdata->phy_mode)) != 0)
+			goto bail;
+	}
+
+	/* Check if we need to attach to a TAH */
+	if (emacdata->tah_idx >= 0) {
+		ep->tah_dev =
+		    ocp_find_device(OCP_ANY_ID, OCP_FUNC_TAH,
+				    emacdata->tah_idx);
+		if (ep->tah_dev == NULL)
+			printk(KERN_WARNING
+			       "emac%d: TAH %d requested but not found !\n",
+			       ocpdev->def->index, emacdata->tah_idx);
+		else if ((rc = emac_init_tah(ep)) != 0)
+			goto bail;
+	}
+
+	if (deferred_init) {
+		if (!list_empty(&emac_init_list)) {
+			struct list_head *entry;
+			struct emac_def_dev *ddev;
+
+			list_for_each(entry, &emac_init_list) {
+				ddev =
+				    list_entry(entry, struct emac_def_dev,
+					       link);
+				emac_init_device(ddev->ocpdev, ddev->mal);
+			}
+		}
+	}
+
+	/* Init link monitoring timer */
+	init_timer(&ep->link_timer);
+	ep->link_timer.function = emac_link_timer;
+	ep->link_timer.data = (unsigned long)ep;
+	ep->timer_ticks = 0;
+
+	/* Fill up the mii_phy structure */
+	ep->phy_mii.dev = ndev;
+	ep->phy_mii.mdio_read = emac_phy_read;
+	ep->phy_mii.mdio_write = emac_phy_write;
+	ep->phy_mii.mode = emacdata->phy_mode;
+
+	/* Find PHY */
+	phy_map = emacdata->phy_map | busy_phy_map;
+	for (i = 0; i <= 0x1f; i++, phy_map >>= 1) {
+		if ((phy_map & 0x1) == 0) {
+			int val = emac_phy_read(ndev, i, MII_BMCR);
+			if (val != 0xffff && val != -1)
+				break;
+		}
+	}
+	if (i == 0x20) {
+		printk(KERN_WARNING "emac%d: Can't find PHY.\n",
+		       ocpdev->def->index);
+		rc = -ENODEV;
+		goto bail;
+	}
+	busy_phy_map |= 1 << i;
+	ep->mii_phy_addr = i;
+	rc = mii_phy_probe(&ep->phy_mii, i);
+	if (rc) {
+		printk(KERN_WARNING "emac%d: Failed to probe PHY type.\n",
+		       ocpdev->def->index);
+		rc = -ENODEV;
+		goto bail;
+	}
+
+	/* Setup initial PHY config & startup aneg */
+	if (ep->phy_mii.def->ops->init)
+		ep->phy_mii.def->ops->init(&ep->phy_mii);
+	netif_carrier_off(ndev);
+	if (ep->phy_mii.def->features & SUPPORTED_Autoneg)
+		ep->want_autoneg = 1;
+	emac_start_link(ep, NULL);
+
+	/* read the MAC Address */
+	for (i = 0; i < 6; i++)
+		ndev->dev_addr[i] = emacdata->mac_addr[i];
+
+	/* Fill in the driver function table */
+	ndev->open = &emac_open;
+	ndev->hard_start_xmit = &emac_start_xmit;
+	ndev->stop = &emac_close;
+	ndev->get_stats = &emac_stats;
+	if (emacdata->jumbo)
+		ndev->change_mtu = &emac_change_mtu;
+	ndev->set_mac_address = &emac_set_mac_address;
+	ndev->set_multicast_list = &emac_set_multicast_list;
+	ndev->do_ioctl = &emac_ioctl;
+	SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops);
+	if (emacdata->tah_idx >= 0)
+		ndev->features = NETIF_F_IP_CSUM | NETIF_F_SG;
+
+	SET_MODULE_OWNER(ndev);
+
+	rc = register_netdev(ndev);
+	if (rc != 0)
+		goto bail;
+
+	printk("%s: IBM emac, MAC %02x:%02x:%02x:%02x:%02x:%02x\n",
+	       ndev->name,
+	       ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2],
+	       ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]);
+	printk(KERN_INFO "%s: Found %s PHY (0x%02x)\n",
+	       ndev->name, ep->phy_mii.def->name, ep->mii_phy_addr);
+
+      bail:
+	if (rc && commac_reg)
+		mal_unregister_commac(ep->mal, &ep->commac);
+	if (rc && ndev)
+		kfree(ndev);
+
+	return rc;
+}
+
+static int emac_probe(struct ocp_device *ocpdev)
+{
+	struct ocp_device *maldev;
+	struct ibm_ocp_mal *mal;
+	struct ocp_func_emac_data *emacdata;
+
+	emacdata = (struct ocp_func_emac_data *)ocpdev->def->additions;
+	if (emacdata == NULL) {
+		printk(KERN_ERR "emac%d: Missing additional datas !\n",
+		       ocpdev->def->index);
+		return -ENODEV;
+	}
+
+	/* Get the MAL device  */
+	maldev = ocp_find_device(OCP_ANY_ID, OCP_FUNC_MAL, emacdata->mal_idx);
+	if (maldev == NULL) {
+		printk("No maldev\n");
+		return -ENODEV;
+	}
+	/*
+	 * Get MAL driver data, it must be here due to link order.
+	 * When the driver is modularized, symbol dependencies will
+	 * ensure the MAL driver is already present if built as a
+	 * module.
+	 */
+	mal = (struct ibm_ocp_mal *)ocp_get_drvdata(maldev);
+	if (mal == NULL) {
+		printk("No maldrv\n");
+		return -ENODEV;
+	}
+
+	/* If we depend on another EMAC for MDIO, wait for it to show up */
+	if (emacdata->mdio_idx >= 0 &&
+	    (emacdata->mdio_idx != ocpdev->def->index) && !mdio_ndev) {
+		struct emac_def_dev *ddev;
+		/* Add this index to the deferred init table */
+		ddev = kmalloc(sizeof(struct emac_def_dev), GFP_KERNEL);
+		ddev->ocpdev = ocpdev;
+		ddev->mal = mal;
+		list_add_tail(&ddev->link, &emac_init_list);
+	} else {
+		emac_init_device(ocpdev, mal);
+	}
+
+	return 0;
+}
+
+/* Structure for a device driver */
+static struct ocp_device_id emac_ids[] = {
+	{.vendor = OCP_ANY_ID,.function = OCP_FUNC_EMAC},
+	{.vendor = OCP_VENDOR_INVALID}
+};
+
+static struct ocp_driver emac_driver = {
+	.name = "emac",
+	.id_table = emac_ids,
+
+	.probe = emac_probe,
+	.remove = emac_remove,
+};
+
+static int __init emac_init(void)
+{
+	int rc;
+
+	printk(KERN_INFO DRV_NAME ": " DRV_DESC ", version " DRV_VERSION "\n");
+	printk(KERN_INFO "Maintained by " DRV_AUTHOR "\n");
+
+	if (skb_res > 2) {
+		printk(KERN_WARNING "Invalid skb_res: %d, cropping to 2\n",
+		       skb_res);
+		skb_res = 2;
+	}
+	rc = ocp_register_driver(&emac_driver);
+	if (rc < 0) {
+		ocp_unregister_driver(&emac_driver);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void __exit emac_exit(void)
+{
+	ocp_unregister_driver(&emac_driver);
+}
+
+module_init(emac_init);
+module_exit(emac_exit);

drivers/net/ibm_emac/ibm_emac_core.h

+/*
+ * ibm_emac_core.h
+ *
+ * Ethernet driver for the built in ethernet on the IBM 405 PowerPC
+ * processor.
+ *
+ *      Armin Kuster akuster@mvista.com
+ *      Sept, 2001
+ *
+ *      Orignial driver
+ *         Johnnie Peters
+ *         jpeters@mvista.com
+ *
+ * Copyright 2000 MontaVista Softare 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.
+ */
+
+#ifndef _IBM_EMAC_CORE_H_
+#define _IBM_EMAC_CORE_H_
+
+#include <linux/netdevice.h>
+#include <asm/ocp.h>
+#include <asm/mmu.h>		/* For phys_addr_t */
+
+#include "ibm_emac.h"
+#include "ibm_emac_phy.h"
+#include "ibm_emac_rgmii.h"
+#include "ibm_emac_zmii.h"
+#include "ibm_emac_mal.h"
+#include "ibm_emac_tah.h"
+
+#ifndef CONFIG_IBM_EMAC_TXB
+#define NUM_TX_BUFF		64
+#define NUM_RX_BUFF		64
+#else
+#define NUM_TX_BUFF		CONFIG_IBM_EMAC_TXB
+#define NUM_RX_BUFF		CONFIG_IBM_EMAC_RXB
+#endif
+
+/* This does 16 byte alignment, exactly what we need.
+ * The packet length includes FCS, but we don't want to
+ * include that when passing upstream as it messes up
+ * bridging applications.
+ */
+#ifndef CONFIG_IBM_EMAC_SKBRES
+#define SKB_RES 2
+#else
+#define SKB_RES CONFIG_IBM_EMAC_SKBRES
+#endif
+
+/* Note about alignement. alloc_skb() returns a cache line
+ * aligned buffer. However, dev_alloc_skb() will add 16 more
+ * bytes and "reserve" them, so our buffer will actually end
+ * on a half cache line. What we do is to use directly
+ * alloc_skb, allocate 16 more bytes to match the total amount
+ * allocated by dev_alloc_skb(), but we don't reserve.
+ */
+#define MAX_NUM_BUF_DESC	255
+#define DESC_BUF_SIZE		4080	/* max 4096-16 */
+#define DESC_BUF_SIZE_REG	(DESC_BUF_SIZE / 16)
+
+/* Transmitter timeout. */
+#define TX_TIMEOUT		(2*HZ)
+
+/* MDIO latency delay */
+#define MDIO_DELAY		50
+
+/* Power managment shift registers */
+#define IBM_CPM_EMMII	0	/* Shift value for MII */
+#define IBM_CPM_EMRX	1	/* Shift value for recv */
+#define IBM_CPM_EMTX	2	/* Shift value for MAC */
+#define IBM_CPM_EMAC(x)	(((x)>>IBM_CPM_EMMII) | ((x)>>IBM_CPM_EMRX) | ((x)>>IBM_CPM_EMTX))
+
+#define ENET_HEADER_SIZE	14
+#define ENET_FCS_SIZE		4
+#define ENET_DEF_MTU_SIZE	1500
+#define ENET_DEF_BUF_SIZE	(ENET_DEF_MTU_SIZE + ENET_HEADER_SIZE + ENET_FCS_SIZE)
+#define EMAC_MIN_FRAME		64
+#define EMAC_MAX_FRAME		9018
+#define EMAC_MIN_MTU		(EMAC_MIN_FRAME - ENET_HEADER_SIZE - ENET_FCS_SIZE)
+#define EMAC_MAX_MTU		(EMAC_MAX_FRAME - ENET_HEADER_SIZE - ENET_FCS_SIZE)
+
+#ifdef CONFIG_IBM_EMAC_ERRMSG
+void emac_serr_dump_0(struct net_device *dev);
+void emac_serr_dump_1(struct net_device *dev);
+void emac_err_dump(struct net_device *dev, int em0isr);
+void emac_phy_dump(struct net_device *);
+void emac_desc_dump(struct net_device *);
+void emac_mac_dump(struct net_device *);
+void emac_mal_dump(struct net_device *);
+#else
+#define emac_serr_dump_0(dev) do { } while (0)
+#define emac_serr_dump_1(dev) do { } while (0)
+#define emac_err_dump(dev,x) do { } while (0)
+#define emac_phy_dump(dev) do { } while (0)
+#define emac_desc_dump(dev) do { } while (0)
+#define emac_mac_dump(dev) do { } while (0)
+#define emac_mal_dump(dev) do { } while (0)
+#endif
+
+struct ocp_enet_private {
+	struct sk_buff *tx_skb[NUM_TX_BUFF];
+	struct sk_buff *rx_skb[NUM_RX_BUFF];
+	struct mal_descriptor *tx_desc;
+	struct mal_descriptor *rx_desc;
+	struct mal_descriptor *rx_dirty;
+	struct net_device_stats stats;
+	int tx_cnt;
+	int rx_slot;
+	int dirty_rx;
+	int tx_slot;
+	int ack_slot;
+	int rx_buffer_size;
+
+	struct mii_phy phy_mii;
+	int mii_phy_addr;
+	int want_autoneg;
+	int timer_ticks;
+	struct timer_list link_timer;
+	struct net_device *mdio_dev;
+
+	struct ocp_device *rgmii_dev;
+	int rgmii_input;
+
+	struct ocp_device *zmii_dev;
+	int zmii_input;
+
+	struct ibm_ocp_mal *mal;
+	int mal_tx_chan, mal_rx_chan;
+	struct mal_commac commac;
+
+	struct ocp_device *tah_dev;
+
+	int opened;
+	int going_away;
+	int wol_irq;
+	emac_t *emacp;
+	struct ocp_device *ocpdev;
+	struct net_device *ndev;
+	spinlock_t lock;
+};
+#endif				/* _IBM_EMAC_CORE_H_ */

drivers/net/ibm_emac/ibm_emac_debug.c

+/*
+ * ibm_ocp_debug.c
+ *
+ * This has all the debug routines that where in *_enet.c
+ *
+ *      Armin Kuster akuster@mvista.com
+ *      April , 2002
+ *
+ * Copyright 2002 MontaVista Softare 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/netdevice.h>
+#include <asm/io.h>
+#include "ibm_ocp_mal.h"
+#include "ibm_ocp_zmii.h"
+#include "ibm_ocp_enet.h"
+
+extern int emac_phy_read(struct net_device *dev, int mii_id, int reg);
+
+void emac_phy_dump(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	unsigned long i;
+	uint data;
+
+	printk(KERN_DEBUG " Prepare for Phy dump....\n");
+	for (i = 0; i < 0x1A; i++) {
+		data = emac_phy_read(dev, fep->mii_phy_addr, i);
+		printk(KERN_DEBUG "Phy reg 0x%lx ==> %4x\n", i, data);
+		if (i == 0x07)
+			i = 0x0f;
+	}
+}
+
+void emac_desc_dump(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	int curr_slot;
+
+	printk(KERN_DEBUG
+	       "dumping the receive descriptors:  current slot is %d\n",
+	       fep->rx_slot);
+	for (curr_slot = 0; curr_slot < NUM_RX_BUFF; curr_slot++) {
+		printk(KERN_DEBUG
+		       "Desc %02d: status 0x%04x, length %3d, addr 0x%x\n",
+		       curr_slot, fep->rx_desc[curr_slot].ctrl,
+		       fep->rx_desc[curr_slot].data_len,
+		       (unsigned int)fep->rx_desc[curr_slot].data_ptr);
+	}
+}
+
+void emac_mac_dump(struct net_device *dev)
+{
+	struct ocp_enet_private *fep = dev->priv;
+	volatile emac_t *emacp = fep->emacp;
+
+	printk(KERN_DEBUG "EMAC DEBUG ********** \n");
+	printk(KERN_DEBUG "EMAC_M0  ==> 0x%x\n", in_be32(&emacp->em0mr0));
+	printk(KERN_DEBUG "EMAC_M1  ==> 0x%x\n", in_be32(&emacp->em0mr1));
+	printk(KERN_DEBUG "EMAC_TXM0==> 0x%x\n", in_be32(&emacp->em0tmr0));
+	printk(KERN_DEBUG "EMAC_TXM1==> 0x%x\n", in_be32(&emacp->em0tmr1));
+	printk(KERN_DEBUG "EMAC_RXM ==> 0x%x\n", in_be32(&emacp->em0rmr));
+	printk(KERN_DEBUG "EMAC_ISR ==> 0x%x\n", in_be32(&emacp->em0isr));
+	printk(KERN_DEBUG "EMAC_IER ==> 0x%x\n", in_be32(&emacp->em0iser));
+	printk(KERN_DEBUG "EMAC_IAH ==> 0x%x\n", in_be32(&emacp->em0iahr));
+	printk(KERN_DEBUG "EMAC_IAL ==> 0x%x\n", in_be32(&emacp->em0ialr));
+	printk(KERN_DEBUG "EMAC_VLAN_TPID_REG ==> 0x%x\n",
+	       in_be32(&emacp->em0vtpid));
+}
+
+void emac_mal_dump(struct net_device *dev)
+{
+	struct ibm_ocp_mal *mal = ((struct ocp_enet_private *)dev->priv)->mal;
+
+	printk(KERN_DEBUG " MAL DEBUG ********** \n");
+	printk(KERN_DEBUG " MCR      ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALCR));
+	printk(KERN_DEBUG " ESR      ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALESR));
+	printk(KERN_DEBUG " IER      ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALIER));
+#ifdef CONFIG_40x
+	printk(KERN_DEBUG " DBR      ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALDBR));
+#endif				/* CONFIG_40x */
+	printk(KERN_DEBUG " TXCASR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCASR));
+	printk(KERN_DEBUG " TXCARR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCARR));
+	printk(KERN_DEBUG " TXEOBISR ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXEOBISR));
+	printk(KERN_DEBUG " TXDEIR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXDEIR));
+	printk(KERN_DEBUG " RXCASR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXCASR));
+	printk(KERN_DEBUG " RXCARR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXCARR));
+	printk(KERN_DEBUG " RXEOBISR ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXEOBISR));
+	printk(KERN_DEBUG " RXDEIR   ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXDEIR));
+	printk(KERN_DEBUG " TXCTP0R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCTP0R));
+	printk(KERN_DEBUG " TXCTP1R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCTP1R));
+	printk(KERN_DEBUG " TXCTP2R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCTP2R));
+	printk(KERN_DEBUG " TXCTP3R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALTXCTP3R));
+	printk(KERN_DEBUG " RXCTP0R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXCTP0R));
+	printk(KERN_DEBUG " RXCTP1R  ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRXCTP1R));
+	printk(KERN_DEBUG " RCBS0    ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRCBS0));
+	printk(KERN_DEBUG " RCBS1    ==> 0x%x\n",
+	       (unsigned int)get_mal_dcrn(mal, DCRN_MALRCBS1));
+}
+
+void emac_serr_dump_0(struct net_device *dev)
+{
+	struct ibm_ocp_mal *mal = ((struct ocp_enet_private *)dev->priv)->mal;
+	unsigned long int mal_error, plb_error, plb_addr;
+
+	mal_error = get_mal_dcrn(mal, DCRN_MALESR);
+	printk(KERN_DEBUG "ppc405_eth_serr: %s channel %ld \n",
+	       (mal_error & 0x40000000) ? "Receive" :
+	       "Transmit", (mal_error & 0x3e000000) >> 25);
+	printk(KERN_DEBUG "  -----  latched error  -----\n");
+	if (mal_error & MALESR_DE)
+		printk(KERN_DEBUG "  DE: descriptor error\n");
+	if (mal_error & MALESR_OEN)
+		printk(KERN_DEBUG "  ONE: OPB non-fullword error\n");
+	if (mal_error & MALESR_OTE)
+		printk(KERN_DEBUG "  OTE: OPB timeout error\n");
+	if (mal_error & MALESR_OSE)
+		printk(KERN_DEBUG "  OSE: OPB slave error\n");
+
+	if (mal_error & MALESR_PEIN) {
+		plb_error = mfdcr(DCRN_PLB0_BESR);
+		printk(KERN_DEBUG
+		       "  PEIN: PLB error, PLB0_BESR is 0x%x\n",
+		       (unsigned int)plb_error);
+		plb_addr = mfdcr(DCRN_PLB0_BEAR);
+		printk(KERN_DEBUG
+		       "  PEIN: PLB error, PLB0_BEAR is 0x%x\n",
+		       (unsigned int)plb_addr);
+	}
+}
+
+void emac_serr_dump_1(struct net_device *dev)
+{
+	struct ibm_ocp_mal *mal = ((struct ocp_enet_private *)dev->priv)->mal;
+	int mal_error = get_mal_dcrn(mal, DCRN_MALESR);
+
+	printk(KERN_DEBUG "  -----  cumulative errors  -----\n");
+	if (mal_error & MALESR_DEI)
+		printk(KERN_DEBUG "  DEI: descriptor error interrupt\n");
+	if (mal_error & MALESR_ONEI)
+		printk(KERN_DEBUG "  OPB non-fullword error interrupt\n");
+	if (mal_error & MALESR_OTEI)
+		printk(KERN_DEBUG "  OTEI: timeout error interrupt\n");
+	if (mal_error & MALESR_OSEI)
+		printk(KERN_DEBUG "  OSEI: slave error interrupt\n");
+	if (mal_error & MALESR_PBEI)
+		printk(KERN_DEBUG "  PBEI: PLB bus error interrupt\n");
+}
+
+void emac_err_dump(struct net_device *dev, int em0isr)
+{
+	printk(KERN_DEBUG "%s: on-chip ethernet error:\n", dev->name);
+
+	if (em0isr & EMAC_ISR_OVR)
+		printk(KERN_DEBUG "  OVR: overrun\n");
+	if (em0isr & EMAC_ISR_PP)
+		printk(KERN_DEBUG "  PP: control pause packet\n");
+	if (em0isr & EMAC_ISR_BP)
+		printk(KERN_DEBUG "  BP: packet error\n");
+	if (em0isr & EMAC_ISR_RP)
+		printk(KERN_DEBUG "  RP: runt packet\n");
+	if (em0isr & EMAC_ISR_SE)
+		printk(KERN_DEBUG "  SE: short event\n");
+	if (em0isr & EMAC_ISR_ALE)
+		printk(KERN_DEBUG "  ALE: odd number of nibbles in packet\n");
+	if (em0isr & EMAC_ISR_BFCS)
+		printk(KERN_DEBUG "  BFCS: bad FCS\n");
+	if (em0isr & EMAC_ISR_PTLE)
+		printk(KERN_DEBUG "  PTLE: oversized packet\n");
+	if (em0isr & EMAC_ISR_ORE)
+		printk(KERN_DEBUG
+		       "  ORE: packet length field > max allowed LLC\n");
+	if (em0isr & EMAC_ISR_IRE)
+		printk(KERN_DEBUG "  IRE: In Range error\n");
+	if (em0isr & EMAC_ISR_DBDM)
+		printk(KERN_DEBUG "  DBDM: xmit error or SQE\n");
+	if (em0isr & EMAC_ISR_DB0)
+		printk(KERN_DEBUG "  DB0: xmit error or SQE on TX channel 0\n");
+	if (em0isr & EMAC_ISR_SE0)
+		printk(KERN_DEBUG
+		       "  SE0: Signal Quality Error test failure from TX channel 0\n");
+	if (em0isr & EMAC_ISR_TE0)
+		printk(KERN_DEBUG "  TE0: xmit channel 0 aborted\n");
+	if (em0isr & EMAC_ISR_DB1)
+		printk(KERN_DEBUG "  DB1: xmit error or SQE on TX channel \n");
+	if (em0isr & EMAC_ISR_SE1)
+		printk(KERN_DEBUG
+		       "  SE1: Signal Quality Error test failure from TX channel 1\n");
+	if (em0isr & EMAC_ISR_TE1)
+		printk(KERN_DEBUG "  TE1: xmit channel 1 aborted\n");
+	if (em0isr & EMAC_ISR_MOS)
+		printk(KERN_DEBUG "  MOS\n");
+	if (em0isr & EMAC_ISR_MOF)
+		printk(KERN_DEBUG "  MOF\n");
+
+	emac_mac_dump(dev);
+	emac_mal_dump(dev);
+}

drivers/net/ibm_emac/ibm_emac_mal.c

+/*
+ * ibm_ocp_mal.c
+ *
+ *      Armin Kuster akuster@mvista.com
+ *      Juen, 2002
+ *
+ * Copyright 2002 MontaVista Softare 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/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/netdevice.h>
+#include <linux/init.h>
+#include <linux/dma-mapping.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/ocp.h>
+
+#include "ibm_emac_mal.h"
+
+// Locking: Should we share a lock with the client ? The client could provide
+// a lock pointer (optionally) in the commac structure... I don't think this is
+// really necessary though
+
+/* This lock protects the commac list. On today UP implementations, it's
+ * really only used as IRQ protection in mal_{register,unregister}_commac()
+ */
+static rwlock_t mal_list_lock = RW_LOCK_UNLOCKED;
+
+int mal_register_commac(struct ibm_ocp_mal *mal, struct mal_commac *commac)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&mal_list_lock, flags);
+
+	/* Don't let multiple commacs claim the same channel */
+	if ((mal->tx_chan_mask & commac->tx_chan_mask) ||
+	    (mal->rx_chan_mask & commac->rx_chan_mask)) {
+		write_unlock_irqrestore(&mal_list_lock, flags);
+		return -EBUSY;
+	}
+
+	mal->tx_chan_mask |= commac->tx_chan_mask;
+	mal->rx_chan_mask |= commac->rx_chan_mask;
+
+	list_add(&commac->list, &mal->commac);
+
+	write_unlock_irqrestore(&mal_list_lock, flags);
+
+	MOD_INC_USE_COUNT;
+
+	return 0;
+}
+
+int mal_unregister_commac(struct ibm_ocp_mal *mal, struct mal_commac *commac)
+{
+	unsigned long flags;
+
+	write_lock_irqsave(&mal_list_lock, flags);
+
+	mal->tx_chan_mask &= ~commac->tx_chan_mask;
+	mal->rx_chan_mask &= ~commac->rx_chan_mask;
+
+	list_del_init(&commac->list);
+
+	write_unlock_irqrestore(&mal_list_lock, flags);
+
+	MOD_DEC_USE_COUNT;
+
+	return 0;
+}
+
+int mal_set_rcbs(struct ibm_ocp_mal *mal, int channel, unsigned long size)
+{
+	switch (channel) {
+	case 0:
+		set_mal_dcrn(mal, DCRN_MALRCBS0, size);
+		break;
+#ifdef DCRN_MALRCBS1
+	case 1:
+		set_mal_dcrn(mal, DCRN_MALRCBS1, size);
+		break;
+#endif
+#ifdef DCRN_MALRCBS2
+	case 2:
+		set_mal_dcrn(mal, DCRN_MALRCBS2, size);
+		break;
+#endif
+#ifdef DCRN_MALRCBS3
+	case 3:
+		set_mal_dcrn(mal, DCRN_MALRCBS3, size);
+		break;
+#endif
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static irqreturn_t mal_serr(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ibm_ocp_mal *mal = dev_instance;
+	unsigned long mal_error;
+
+	/*
+	 * This SERR applies to one of the devices on the MAL, here we charge
+	 * it against the first EMAC registered for the MAL.
+	 */
+
+	mal_error = get_mal_dcrn(mal, DCRN_MALESR);
+
+	printk(KERN_ERR "%s: System Error (MALESR=%lx)\n",
+	       "MAL" /* FIXME: get the name right */ , mal_error);
+
+	/* FIXME: decipher error */
+	/* DIXME: distribute to commacs, if possible */
+
+	/* Clear the error status register */
+	set_mal_dcrn(mal, DCRN_MALESR, mal_error);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_txeob(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ibm_ocp_mal *mal = dev_instance;
+	struct list_head *l;
+	unsigned long isr;
+
+	isr = get_mal_dcrn(mal, DCRN_MALTXEOBISR);
+	set_mal_dcrn(mal, DCRN_MALTXEOBISR, isr);
+
+	read_lock(&mal_list_lock);
+	list_for_each(l, &mal->commac) {
+		struct mal_commac *mc = list_entry(l, struct mal_commac, list);
+
+		if (isr & mc->tx_chan_mask) {
+			mc->ops->txeob(mc->dev, isr & mc->tx_chan_mask);
+		}
+	}
+	read_unlock(&mal_list_lock);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_rxeob(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ibm_ocp_mal *mal = dev_instance;
+	struct list_head *l;
+	unsigned long isr;
+
+	isr = get_mal_dcrn(mal, DCRN_MALRXEOBISR);
+	set_mal_dcrn(mal, DCRN_MALRXEOBISR, isr);
+
+	read_lock(&mal_list_lock);
+	list_for_each(l, &mal->commac) {
+		struct mal_commac *mc = list_entry(l, struct mal_commac, list);
+
+		if (isr & mc->rx_chan_mask) {
+			mc->ops->rxeob(mc->dev, isr & mc->rx_chan_mask);
+		}
+	}
+	read_unlock(&mal_list_lock);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mal_txde(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ibm_ocp_mal *mal = dev_instance;
+	struct list_head *l;
+	unsigned long deir;
+
+	deir = get_mal_dcrn(mal, DCRN_MALTXDEIR);
+
+	/* FIXME: print which MAL correctly */
+	printk(KERN_WARNING "%s: Tx descriptor error (MALTXDEIR=%lx)\n",
+	       "MAL", deir);
+
+	read_lock(&mal_list_lock);
+	list_for_each(l, &mal->commac) {
+		struct mal_commac *mc = list_entry(l, struct mal_commac, list);
+
+		if (deir & mc->tx_chan_mask) {
+			mc->ops->txde(mc->dev, deir & mc->tx_chan_mask);
+		}
+	}
+	read_unlock(&mal_list_lock);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * This interrupt should be very rare at best.  This occurs when
+ * the hardware has a problem with the receive descriptors.  The manual
+ * states that it occurs when the hardware cannot the receive descriptor
+ * empty bit is not set.  The recovery mechanism will be to
+ * traverse through the descriptors, handle any that are marked to be
+ * handled and reinitialize each along the way.  At that point the driver
+ * will be restarted.
+ */
+static irqreturn_t mal_rxde(int irq, void *dev_instance, struct pt_regs *regs)
+{
+	struct ibm_ocp_mal *mal = dev_instance;
+	struct list_head *l;
+	unsigned long deir;
+
+	deir = get_mal_dcrn(mal, DCRN_MALRXDEIR);
+
+	/*
+	 * This really is needed.  This case encountered in stress testing.
+	 */
+	if (deir == 0)
+		return IRQ_HANDLED;
+
+	/* FIXME: print which MAL correctly */
+	printk(KERN_WARNING "%s: Rx descriptor error (MALRXDEIR=%lx)\n",
+	       "MAL", deir);
+
+	read_lock(&mal_list_lock);
+	list_for_each(l, &mal->commac) {
+		struct mal_commac *mc = list_entry(l, struct mal_commac, list);
+
+		if (deir & mc->rx_chan_mask) {
+			mc->ops->rxde(mc->dev, deir & mc->rx_chan_mask);
+		}
+	}
+	read_unlock(&mal_list_lock);
+
+	return IRQ_HANDLED;
+}
+
+static int __init mal_probe(struct ocp_device *ocpdev)
+{
+	struct ibm_ocp_mal *mal = NULL;
+	struct ocp_func_mal_data *maldata;
+	int err = 0;
+
+	maldata = (struct ocp_func_mal_data *)ocpdev->def->additions;
+	if (maldata == NULL) {
+		printk(KERN_ERR "mal%d: Missing additional datas !\n",
+		       ocpdev->def->index);
+		return -ENODEV;
+	}
+
+	mal = kmalloc(sizeof(struct ibm_ocp_mal), GFP_KERNEL);
+	if (mal == NULL) {
+		printk(KERN_ERR
+		       "mal%d: Out of memory allocating MAL structure !\n",
+		       ocpdev->def->index);
+		return -ENOMEM;
+	}
+	memset(mal, 0, sizeof(*mal));
+
+	switch (ocpdev->def->index) {
+	case 0:
+		mal->dcrbase = DCRN_MAL_BASE;
+		break;
+#ifdef DCRN_MAL1_BASE
+	case 1:
+		mal->dcrbase = DCRN_MAL1_BASE;
+		break;
+#endif
+	default:
+		BUG();
+	}
+
+	/**************************/
+
+	INIT_LIST_HEAD(&mal->commac);
+
+	set_mal_dcrn(mal, DCRN_MALRXCARR, 0xFFFFFFFF);
+	set_mal_dcrn(mal, DCRN_MALTXCARR, 0xFFFFFFFF);
+
+	set_mal_dcrn(mal, DCRN_MALCR, MALCR_MMSR);	/* 384 */
+	/* FIXME: Add delay */
+
+	/* Set the MAL configuration register */
+	set_mal_dcrn(mal, DCRN_MALCR,
+		     MALCR_PLBB | MALCR_OPBBL | MALCR_LEA |
+		     MALCR_PLBLT_DEFAULT);
+
+	/* It would be nice to allocate buffers separately for each
+	 * channel, but we can't because the channels share the upper
+	 * 13 bits of address lines.  Each channels buffer must also
+	 * be 4k aligned, so we allocate 4k for each channel.  This is
+	 * inefficient FIXME: do better, if possible */
+	mal->tx_virt_addr = dma_alloc_coherent(&ocpdev->dev,
+					       MAL_DT_ALIGN *
+					       maldata->num_tx_chans,
+					       &mal->tx_phys_addr, GFP_KERNEL);
+	if (mal->tx_virt_addr == NULL) {
+		printk(KERN_ERR
+		       "mal%d: Out of memory allocating MAL descriptors !\n",
+		       ocpdev->def->index);
+		err = -ENOMEM;
+		goto fail;
+	}
+
+	/* God, oh, god, I hate DCRs */
+	set_mal_dcrn(mal, DCRN_MALTXCTP0R, mal->tx_phys_addr);
+#ifdef DCRN_MALTXCTP1R
+	if (maldata->num_tx_chans > 1)
+		set_mal_dcrn(mal, DCRN_MALTXCTP1R,
+			     mal->tx_phys_addr + MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP1R */
+#ifdef DCRN_MALTXCTP2R
+	if (maldata->num_tx_chans > 2)
+		set_mal_dcrn(mal, DCRN_MALTXCTP2R,
+			     mal->tx_phys_addr + 2 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP2R */
+#ifdef DCRN_MALTXCTP3R
+	if (maldata->num_tx_chans > 3)
+		set_mal_dcrn(mal, DCRN_MALTXCTP3R,
+			     mal->tx_phys_addr + 3 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP3R */
+#ifdef DCRN_MALTXCTP4R
+	if (maldata->num_tx_chans > 4)
+		set_mal_dcrn(mal, DCRN_MALTXCTP4R,
+			     mal->tx_phys_addr + 4 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP4R */
+#ifdef DCRN_MALTXCTP5R
+	if (maldata->num_tx_chans > 5)
+		set_mal_dcrn(mal, DCRN_MALTXCTP5R,
+			     mal->tx_phys_addr + 5 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP5R */
+#ifdef DCRN_MALTXCTP6R
+	if (maldata->num_tx_chans > 6)
+		set_mal_dcrn(mal, DCRN_MALTXCTP6R,
+			     mal->tx_phys_addr + 6 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP6R */
+#ifdef DCRN_MALTXCTP7R
+	if (maldata->num_tx_chans > 7)
+		set_mal_dcrn(mal, DCRN_MALTXCTP7R,
+			     mal->tx_phys_addr + 7 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALTXCTP7R */
+
+	mal->rx_virt_addr = dma_alloc_coherent(&ocpdev->dev,
+					       MAL_DT_ALIGN *
+					       maldata->num_rx_chans,
+					       &mal->rx_phys_addr, GFP_KERNEL);
+
+	set_mal_dcrn(mal, DCRN_MALRXCTP0R, mal->rx_phys_addr);
+#ifdef DCRN_MALRXCTP1R
+	if (maldata->num_rx_chans > 1)
+		set_mal_dcrn(mal, DCRN_MALRXCTP1R,
+			     mal->rx_phys_addr + MAL_DT_ALIGN);
+#endif				/* DCRN_MALRXCTP1R */
+#ifdef DCRN_MALRXCTP2R
+	if (maldata->num_rx_chans > 2)
+		set_mal_dcrn(mal, DCRN_MALRXCTP2R,
+			     mal->rx_phys_addr + 2 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALRXCTP2R */
+#ifdef DCRN_MALRXCTP3R
+	if (maldata->num_rx_chans > 3)
+		set_mal_dcrn(mal, DCRN_MALRXCTP3R,
+			     mal->rx_phys_addr + 3 * MAL_DT_ALIGN);
+#endif				/* DCRN_MALRXCTP3R */
+
+	err = request_irq(maldata->serr_irq, mal_serr, 0, "MAL SERR", mal);
+	if (err)
+		goto fail;
+	err = request_irq(maldata->txde_irq, mal_txde, 0, "MAL TX DE ", mal);
+	if (err)
+		goto fail;
+	err = request_irq(maldata->txeob_irq, mal_txeob, 0, "MAL TX EOB", mal);
+	if (err)
+		goto fail;
+	err = request_irq(maldata->rxde_irq, mal_rxde, 0, "MAL RX DE", mal);
+	if (err)
+		goto fail;
+	err = request_irq(maldata->rxeob_irq, mal_rxeob, 0, "MAL RX EOB", mal);
+	if (err)
+		goto fail;
+
+	set_mal_dcrn(mal, DCRN_MALIER,
+		     MALIER_DE | MALIER_NE | MALIER_TE |
+		     MALIER_OPBE | MALIER_PLBE);
+
+	/* Advertise me to the rest of the world */
+	ocp_set_drvdata(ocpdev, mal);
+
+	printk(KERN_INFO "mal%d: Initialized, %d tx channels, %d rx channels\n",
+	       ocpdev->def->index, maldata->num_tx_chans,
+	       maldata->num_rx_chans);
+
+	return 0;
+
+      fail:
+	/* FIXME: dispose requested IRQs ! */
+	if (err && mal)
+		kfree(mal);
+	return err;
+}
+
+static void __exit mal_remove(struct ocp_device *ocpdev)
+{
+	struct ibm_ocp_mal *mal = ocp_get_drvdata(ocpdev);
+	struct ocp_func_mal_data *maldata = ocpdev->def->additions;
+
+	BUG_ON(!maldata);
+
+	ocp_set_drvdata(ocpdev, NULL);
+
+	/* FIXME: shut down the MAL, deal with dependency with emac */
+	free_irq(maldata->serr_irq, mal);
+	free_irq(maldata->txde_irq, mal);
+	free_irq(maldata->txeob_irq, mal);
+	free_irq(maldata->rxde_irq, mal);
+	free_irq(maldata->rxeob_irq, mal);
+
+	if (mal->tx_virt_addr)
+		dma_free_coherent(&ocpdev->dev,
+				  MAL_DT_ALIGN * maldata->num_tx_chans,
+				  mal->tx_virt_addr, mal->tx_phys_addr);
+
+	if (mal->rx_virt_addr)
+		dma_free_coherent(&ocpdev->dev,
+				  MAL_DT_ALIGN * maldata->num_rx_chans,
+				  mal->rx_virt_addr, mal->rx_phys_addr);
+
+	kfree(mal);
+}
+
+/* Structure for a device driver */
+static struct ocp_device_id mal_ids[] = {
+	{.vendor = OCP_ANY_ID,.function = OCP_FUNC_MAL},
+	{.vendor = OCP_VENDOR_INVALID}
+};
+
+static struct ocp_driver mal_driver = {
+	.name = "mal",
+	.id_table = mal_ids,
+
+	.probe = mal_probe,
+	.remove = mal_remove,
+};
+
+static int __init init_mals(void)
+{
+	int rc;
+
+	rc = ocp_register_driver(&mal_driver);
+	if (rc < 0) {
+		ocp_unregister_driver(&mal_driver);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void __exit exit_mals(void)
+{
+	ocp_unregister_driver(&mal_driver);
+}
+
+module_init(init_mals);
+module_exit(exit_mals);

drivers/net/ibm_emac/ibm_emac_mal.h

+#ifndef _IBM_EMAC_MAL_H
+#define _IBM_EMAC_MAL_H
+
+#include <linux/list.h>
+
+#define MAL_DT_ALIGN	(4096)	/* Alignment for each channel's descriptor table */
+
+#define MAL_CHAN_MASK(chan)	(0x80000000 >> (chan))
+
+/* MAL Buffer Descriptor structure */
+struct mal_descriptor {
+	unsigned short ctrl;	/* MAL / Commac status control bits */
+	short data_len;		/* Max length is 4K-1 (12 bits)     */
+	unsigned char *data_ptr;	/* pointer to actual data buffer    */
+} __attribute__ ((packed));
+
+/* the following defines are for the MadMAL status and control registers. */
+/* MADMAL transmit and receive status/control bits  */
+#define MAL_RX_CTRL_EMPTY		0x8000
+#define MAL_RX_CTRL_WRAP		0x4000
+#define MAL_RX_CTRL_CM			0x2000
+#define MAL_RX_CTRL_LAST		0x1000
+#define MAL_RX_CTRL_FIRST		0x0800
+#define MAL_RX_CTRL_INTR		0x0400
+
+#define MAL_TX_CTRL_READY		0x8000
+#define MAL_TX_CTRL_WRAP		0x4000
+#define MAL_TX_CTRL_CM			0x2000
+#define MAL_TX_CTRL_LAST		0x1000
+#define MAL_TX_CTRL_INTR		0x0400
+
+struct mal_commac_ops {
+	void (*txeob) (void *dev, u32 chanmask);
+	void (*txde) (void *dev, u32 chanmask);
+	void (*rxeob) (void *dev, u32 chanmask);
+	void (*rxde) (void *dev, u32 chanmask);
+};
+
+struct mal_commac {
+	struct mal_commac_ops *ops;
+	void *dev;
+	u32 tx_chan_mask, rx_chan_mask;
+	struct list_head list;
+};
+
+struct ibm_ocp_mal {
+	int dcrbase;
+
+	struct list_head commac;
+	u32 tx_chan_mask, rx_chan_mask;
+
+	dma_addr_t tx_phys_addr;
+	struct mal_descriptor *tx_virt_addr;
+
+	dma_addr_t rx_phys_addr;
+	struct mal_descriptor *rx_virt_addr;
+};
+
+#define GET_MAL_STANZA(base,dcrn) \
+	case base: \
+		x = mfdcr(dcrn(base)); \
+		break;
+
+#define SET_MAL_STANZA(base,dcrn, val) \
+	case base: \
+		mtdcr(dcrn(base), (val)); \
+		break;
+
+#define GET_MAL0_STANZA(dcrn) GET_MAL_STANZA(DCRN_MAL_BASE,dcrn)
+#define SET_MAL0_STANZA(dcrn,val) SET_MAL_STANZA(DCRN_MAL_BASE,dcrn,val)
+
+#ifdef DCRN_MAL1_BASE
+#define GET_MAL1_STANZA(dcrn) GET_MAL_STANZA(DCRN_MAL1_BASE,dcrn)
+#define SET_MAL1_STANZA(dcrn,val) SET_MAL_STANZA(DCRN_MAL1_BASE,dcrn,val)
+#else				/* ! DCRN_MAL1_BASE */
+#define GET_MAL1_STANZA(dcrn)
+#define SET_MAL1_STANZA(dcrn,val)
+#endif
+
+#define get_mal_dcrn(mal, dcrn) ({ \
+	u32 x; \
+	switch ((mal)->dcrbase) { \
+		GET_MAL0_STANZA(dcrn) \
+		GET_MAL1_STANZA(dcrn) \
+	default: \
+		BUG(); \
+	} \
+x; })
+
+#define set_mal_dcrn(mal, dcrn, val) do { \
+	switch ((mal)->dcrbase) { \
+		SET_MAL0_STANZA(dcrn,val) \
+		SET_MAL1_STANZA(dcrn,val) \
+	default: \
+		BUG(); \
+	} } while (0)
+
+static inline void mal_enable_tx_channels(struct ibm_ocp_mal *mal, u32 chanmask)
+{
+	set_mal_dcrn(mal, DCRN_MALTXCASR,
+		     get_mal_dcrn(mal, DCRN_MALTXCASR) | chanmask);
+}
+
+static inline void mal_disable_tx_channels(struct ibm_ocp_mal *mal,
+					   u32 chanmask)
+{
+	set_mal_dcrn(mal, DCRN_MALTXCARR, chanmask);
+}
+
+static inline void mal_enable_rx_channels(struct ibm_ocp_mal *mal, u32 chanmask)
+{
+	set_mal_dcrn(mal, DCRN_MALRXCASR,
+		     get_mal_dcrn(mal, DCRN_MALRXCASR) | chanmask);
+}
+
+static inline void mal_disable_rx_channels(struct ibm_ocp_mal *mal,
+					   u32 chanmask)
+{
+	set_mal_dcrn(mal, DCRN_MALRXCARR, chanmask);
+}
+
+extern int mal_register_commac(struct ibm_ocp_mal *mal,
+			       struct mal_commac *commac);
+extern int mal_unregister_commac(struct ibm_ocp_mal *mal,
+				 struct mal_commac *commac);
+
+extern int mal_set_rcbs(struct ibm_ocp_mal *mal, int channel,
+			unsigned long size);
+
+#endif				/* _IBM_EMAC_MAL_H */

drivers/net/ibm_emac/ibm_emac_phy.c

+/*
+ * ibm_ocp_phy.c
+ *
+ * PHY drivers for the ibm ocp ethernet driver. Borrowed
+ * from sungem_phy.c, though I only kept the generic MII
+ * driver for now.
+ * 
+ * This file should be shared with other drivers or eventually
+ * merged as the "low level" part of miilib
+ * 
+ * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
+ *
+ */
+
+#include <linux/config.h>
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/delay.h>
+
+#include "ibm_emac_phy.h"
+
+static int reset_one_mii_phy(struct mii_phy *phy, int phy_id)
+{
+	u16 val;
+	int limit = 10000;
+
+	val = __phy_read(phy, phy_id, MII_BMCR);
+	val &= ~BMCR_ISOLATE;
+	val |= BMCR_RESET;
+	__phy_write(phy, phy_id, MII_BMCR, val);
+
+	udelay(100);
+
+	while (limit--) {
+		val = __phy_read(phy, phy_id, MII_BMCR);
+		if ((val & BMCR_RESET) == 0)
+			break;
+		udelay(10);
+	}
+	if ((val & BMCR_ISOLATE) && limit > 0)
+		__phy_write(phy, phy_id, MII_BMCR, val & ~BMCR_ISOLATE);
+
+	return (limit <= 0);
+}
+
+static int cis8201_init(struct mii_phy *phy)
+{
+	u16 epcr;
+
+	epcr = phy_read(phy, MII_CIS8201_EPCR);
+	epcr &= ~EPCR_MODE_MASK;
+
+	switch (phy->mode) {
+	case PHY_MODE_TBI:
+		epcr |= EPCR_TBI_MODE;
+		break;
+	case PHY_MODE_RTBI:
+		epcr |= EPCR_RTBI_MODE;
+		break;
+	case PHY_MODE_GMII:
+		epcr |= EPCR_GMII_MODE;
+		break;
+	case PHY_MODE_RGMII:
+	default:
+		epcr |= EPCR_RGMII_MODE;
+	}
+
+	phy_write(phy, MII_CIS8201_EPCR, epcr);
+
+	return 0;
+}
+
+static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
+{
+	u16 ctl, adv;
+
+	phy->autoneg = 1;
+	phy->speed = SPEED_10;
+	phy->duplex = DUPLEX_HALF;
+	phy->pause = 0;
+	phy->advertising = advertise;
+
+	/* Setup standard advertise */
+	adv = phy_read(phy, 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(phy, MII_ADVERTISE, adv);
+
+	/* Start/Restart aneg */
+	ctl = phy_read(phy, MII_BMCR);
+	ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
+	phy_write(phy, MII_BMCR, ctl);
+
+	return 0;
+}
+
+static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
+{
+	u16 ctl;
+
+	phy->autoneg = 0;
+	phy->speed = speed;
+	phy->duplex = fd;
+	phy->pause = 0;
+
+	ctl = phy_read(phy, MII_BMCR);
+	ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_ANENABLE);
+
+	/* First reset the PHY */
+	phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
+
+	/* Select speed & duplex */
+	switch (speed) {
+	case SPEED_10:
+		break;
+	case SPEED_100:
+		ctl |= BMCR_SPEED100;
+		break;
+	case SPEED_1000:
+	default:
+		return -EINVAL;
+	}
+	if (fd == DUPLEX_FULL)
+		ctl |= BMCR_FULLDPLX;
+	phy_write(phy, MII_BMCR, ctl);
+
+	return 0;
+}
+
+static int genmii_poll_link(struct mii_phy *phy)
+{
+	u16 status;
+
+	(void)phy_read(phy, MII_BMSR);
+	status = phy_read(phy, MII_BMSR);
+	if ((status & BMSR_LSTATUS) == 0)
+		return 0;
+	if (phy->autoneg && !(status & BMSR_ANEGCOMPLETE))
+		return 0;
+	return 1;
+}
+
+#define	MII_CIS8201_ACSR	0x1c
+#define  ACSR_DUPLEX_STATUS	0x0020
+#define  ACSR_SPEED_1000BASET	0x0010
+#define  ACSR_SPEED_100BASET	0x0008
+
+static int cis8201_read_link(struct mii_phy *phy)
+{
+	u16 acsr;
+
+	if (phy->autoneg) {
+		acsr = phy_read(phy, MII_CIS8201_ACSR);
+
+		if (acsr & ACSR_DUPLEX_STATUS)
+			phy->duplex = DUPLEX_FULL;
+		else
+			phy->duplex = DUPLEX_HALF;
+		if (acsr & ACSR_SPEED_1000BASET) {
+			phy->speed = SPEED_1000;
+		} else if (acsr & ACSR_SPEED_100BASET)
+			phy->speed = SPEED_100;
+		else
+			phy->speed = SPEED_10;
+		phy->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 genmii_read_link(struct mii_phy *phy)
+{
+	u16 lpa;
+
+	if (phy->autoneg) {
+		lpa = phy_read(phy, MII_LPA);
+
+		if (lpa & (LPA_10FULL | LPA_100FULL))
+			phy->duplex = DUPLEX_FULL;
+		else
+			phy->duplex = DUPLEX_HALF;
+		if (lpa & (LPA_100FULL | LPA_100HALF))
+			phy->speed = SPEED_100;
+		else
+			phy->speed = SPEED_10;
+		phy->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;
+}
+
+#define MII_BASIC_FEATURES	(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | \
+				 SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | \
+				 SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII)
+#define MII_GBIT_FEATURES	(MII_BASIC_FEATURES | \
+				 SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)
+
+/* CIS8201 phy ops */
+static struct mii_phy_ops cis8201_phy_ops = {
+	init:cis8201_init,
+	setup_aneg:genmii_setup_aneg,
+	setup_forced:genmii_setup_forced,
+	poll_link:genmii_poll_link,
+	read_link:cis8201_read_link
+};
+
+/* Generic implementation for most 10/100 PHYs */
+static struct mii_phy_ops generic_phy_ops = {
+	setup_aneg:genmii_setup_aneg,
+	setup_forced:genmii_setup_forced,
+	poll_link:genmii_poll_link,
+	read_link:genmii_read_link
+};
+
+static struct mii_phy_def cis8201_phy_def = {
+	phy_id:0x000fc410,
+	phy_id_mask:0x000ffff0,
+	name:"CIS8201 Gigabit Ethernet",
+	features:MII_GBIT_FEATURES,
+	magic_aneg:0,
+	ops:&cis8201_phy_ops
+};
+
+static struct mii_phy_def genmii_phy_def = {
+	phy_id:0x00000000,
+	phy_id_mask:0x00000000,
+	name:"Generic MII",
+	features:MII_BASIC_FEATURES,
+	magic_aneg:0,
+	ops:&generic_phy_ops
+};
+
+static struct mii_phy_def *mii_phy_table[] = {
+	&cis8201_phy_def,
+	&genmii_phy_def,
+	NULL
+};
+
+int mii_phy_probe(struct mii_phy *phy, int mii_id)
+{
+	int rc;
+	u32 id;
+	struct mii_phy_def *def;
+	int i;
+
+	phy->autoneg = 0;
+	phy->advertising = 0;
+	phy->mii_id = mii_id;
+	phy->speed = 0;
+	phy->duplex = 0;
+	phy->pause = 0;
+
+	/* Take PHY out of isloate mode and reset it. */
+	rc = reset_one_mii_phy(phy, mii_id);
+	if (rc)
+		return -ENODEV;
+
+	/* Read ID and find matching entry */
+	id = (phy_read(phy, MII_PHYSID1) << 16 | phy_read(phy, MII_PHYSID2))
+	    & 0xfffffff0;
+	for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
+		if ((id & def->phy_id_mask) == def->phy_id)
+			break;
+	/* Should never be NULL (we have a generic entry), but... */
+	if (def == NULL)
+		return -ENODEV;
+
+	phy->def = def;
+
+	/* Setup default advertising */
+	phy->advertising = def->features;
+
+	return 0;
+}
+
+MODULE_LICENSE("GPL");

drivers/net/ibm_emac/ibm_emac_phy.h

+
+/*
+ * ibm_emac_phy.h
+ *
+ *
+ *      Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *      February 2003
+ *
+ * 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.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR   IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT,  INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * This file basically duplicates sungem_phy.{c,h} with different PHYs
+ * supported. I'm looking into merging that in a single mii layer more
+ * flexible than mii.c 
+ */
+
+#ifndef _IBM_EMAC_PHY_H_
+#define _IBM_EMAC_PHY_H_
+
+/*
+ * PHY mode settings
+ * Used for multi-mode capable PHYs
+ */
+#define PHY_MODE_NA	0
+#define PHY_MODE_MII	1
+#define PHY_MODE_RMII	2
+#define PHY_MODE_SMII	3
+#define PHY_MODE_RGMII	4
+#define PHY_MODE_TBI	5
+#define PHY_MODE_GMII	6
+#define PHY_MODE_RTBI	7
+#define PHY_MODE_SGMII	8
+
+/*
+ * PHY specific registers/values
+ */
+
+/* CIS8201 */
+#define MII_CIS8201_EPCR	0x17
+#define EPCR_MODE_MASK		0x3000
+#define EPCR_GMII_MODE		0x0000
+#define EPCR_RGMII_MODE		0x1000
+#define EPCR_TBI_MODE		0x2000
+#define EPCR_RTBI_MODE		0x3000
+
+struct mii_phy;
+
+/* Operations supported by any kind of PHY */
+struct mii_phy_ops {
+	int (*init) (struct mii_phy * phy);
+	int (*suspend) (struct mii_phy * phy, int wol_options);
+	int (*setup_aneg) (struct mii_phy * phy, u32 advertise);
+	int (*setup_forced) (struct mii_phy * phy, int speed, int fd);
+	int (*poll_link) (struct mii_phy * phy);
+	int (*read_link) (struct mii_phy * phy);
+};
+
+/* Structure used to statically define an mii/gii based PHY */
+struct mii_phy_def {
+	u32 phy_id;		/* Concatenated ID1 << 16 | ID2 */
+	u32 phy_id_mask;	/* Significant bits */
+	u32 features;		/* Ethtool SUPPORTED_* defines */
+	int magic_aneg;		/* Autoneg does all speed test for us */
+	const char *name;
+	const struct mii_phy_ops *ops;
+};
+
+/* An instance of a PHY, partially borrowed from mii_if_info */
+struct mii_phy {
+	struct mii_phy_def *def;
+	int advertising;
+	int mii_id;
+
+	/* 1: autoneg enabled, 0: disabled */
+	int autoneg;
+
+	/* forced speed & duplex (no autoneg)
+	 * partner speed & duplex & pause (autoneg)
+	 */
+	int speed;
+	int duplex;
+	int pause;
+
+	/* PHY mode - if needed */
+	int mode;
+
+	/* Provided by host chip */
+	struct net_device *dev;
+	int (*mdio_read) (struct net_device * dev, int mii_id, int reg);
+	void (*mdio_write) (struct net_device * dev, int mii_id, int reg,
+			    int val);
+};
+
+/* Pass in a struct mii_phy with dev, mdio_read and mdio_write
+ * filled, the remaining fields will be filled on return
+ */
+extern int mii_phy_probe(struct mii_phy *phy, int mii_id);
+
+static inline int __phy_read(struct mii_phy *phy, int id, int reg)
+{
+	return phy->mdio_read(phy->dev, id, reg);
+}
+
+static inline void __phy_write(struct mii_phy *phy, int id, int reg, int val)
+{
+	phy->mdio_write(phy->dev, id, reg, val);
+}
+
+static inline int phy_read(struct mii_phy *phy, int reg)
+{
+	return phy->mdio_read(phy->dev, phy->mii_id, reg);
+}
+
+static inline void phy_write(struct mii_phy *phy, int reg, int val)
+{
+	phy->mdio_write(phy->dev, phy->mii_id, reg, val);
+}
+
+#endif				/* _IBM_EMAC_PHY_H_ */

drivers/net/ibm_emac/ibm_emac_rgmii.h

+/*
+ * Defines for the IBM RGMII bridge
+ *
+ * Based on ocp_zmii.h/ibm_emac_zmii.h
+ * Armin Kuster akuster@mvista.com
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * 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.
+ */
+
+#ifndef _IBM_EMAC_RGMII_H_
+#define _IBM_EMAC_RGMII_H_
+
+#include <linux/config.h>
+
+/* RGMII bridge */
+typedef struct rgmii_regs {
+	u32 fer;		/* Function enable register */
+	u32 ssr;		/* Speed select register */
+} rgmii_t;
+
+#define RGMII_INPUTS			4
+
+/* RGMII device */
+struct ibm_ocp_rgmii {
+	struct rgmii_regs *base;
+	int mode[RGMII_INPUTS];
+	int users;		/* number of EMACs using this RGMII bridge */
+};
+
+/* Fuctional Enable Reg */
+#define RGMII_FER_MASK(x)		(0x00000007 << (4*x))
+#define RGMII_RTBI			0x00000004
+#define RGMII_RGMII			0x00000005
+#define RGMII_TBI  			0x00000006
+#define RGMII_GMII 			0x00000007
+
+/* Speed Selection reg */
+
+#define RGMII_SP2_100	0x00000002
+#define RGMII_SP2_1000	0x00000004
+#define RGMII_SP3_100	0x00000200
+#define RGMII_SP3_1000	0x00000400
+
+#define RGMII_MII2_SPDMASK	 0x00000007
+#define RGMII_MII3_SPDMASK	 0x00000700
+
+#define RGMII_MII2_100MB	 RGMII_SP2_100 & ~RGMII_SP2_1000
+#define RGMII_MII2_1000MB 	 RGMII_SP2_1000 & ~RGMII_SP2_100
+#define RGMII_MII2_10MB		 ~(RGMII_SP2_100 | RGMII_SP2_1000)
+#define RGMII_MII3_100MB	 RGMII_SP3_100 & ~RGMII_SP3_1000
+#define RGMII_MII3_1000MB 	 RGMII_SP3_1000 & ~RGMII_SP3_100
+#define RGMII_MII3_10MB		 ~(RGMII_SP3_100 | RGMII_SP3_1000)
+
+#define RTBI		0
+#define RGMII		1
+#define TBI		2
+#define GMII		3
+
+#endif				/* _IBM_EMAC_RGMII_H_ */

drivers/net/ibm_emac/ibm_emac_tah.h

+/*
+ * Defines for the IBM TAH
+ *
+ * Copyright 2004 MontaVista Software, Inc.
+ * Matt Porter <mporter@kernel.crashing.org>
+ *
+ * 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.
+ */
+
+#ifndef _IBM_EMAC_TAH_H
+#define _IBM_EMAC_TAH_H
+
+/* TAH */
+typedef struct tah_regs {
+	u32 tah_revid;
+	u32 pad[3];
+	u32 tah_mr;
+	u32 tah_ssr0;
+	u32 tah_ssr1;
+	u32 tah_ssr2;
+	u32 tah_ssr3;
+	u32 tah_ssr4;
+	u32 tah_ssr5;
+	u32 tah_tsr;
+} tah_t;
+
+/* TAH engine */
+#define TAH_MR_CVR			0x80000000
+#define TAH_MR_SR			0x40000000
+#define TAH_MR_ST_256			0x01000000
+#define TAH_MR_ST_512			0x02000000
+#define TAH_MR_ST_768			0x03000000
+#define TAH_MR_ST_1024			0x04000000
+#define TAH_MR_ST_1280			0x05000000
+#define TAH_MR_ST_1536			0x06000000
+#define TAH_MR_TFS_16KB			0x00000000
+#define TAH_MR_TFS_2KB			0x00200000
+#define TAH_MR_TFS_4KB			0x00400000
+#define TAH_MR_TFS_6KB			0x00600000
+#define TAH_MR_TFS_8KB			0x00800000
+#define TAH_MR_TFS_10KB			0x00a00000
+#define TAH_MR_DTFP			0x00100000
+#define TAH_MR_DIG			0x00080000
+
+#endif				/* _IBM_EMAC_TAH_H */

drivers/net/ibm_emac/ibm_emac_zmii.h

+/*
+ * ocp_zmii.h
+ *
+ * Defines for the IBM ZMII bridge
+ *
+ *      Armin Kuster akuster@mvista.com
+ *      Dec, 2001
+ *
+ * Copyright 2001 MontaVista Softare 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.
+ */
+
+#ifndef _IBM_EMAC_ZMII_H_
+#define _IBM_EMAC_ZMII_H_
+
+#include <linux/config.h>
+
+/* ZMII bridge registers */
+struct zmii_regs {
+	u32 fer;		/* Function enable reg */
+	u32 ssr;		/* Speed select reg */
+	u32 smiirs;		/* SMII status reg */
+};
+
+#define ZMII_INPUTS	4
+
+/* ZMII device */
+struct ibm_ocp_zmii {
+	struct zmii_regs *base;
+	int mode[ZMII_INPUTS];
+	int users;		/* number of EMACs using this ZMII bridge */
+};
+
+/* Fuctional Enable Reg */
+
+#define ZMII_FER_MASK(x)	(0xf0000000 >> (4*x))
+
+#define ZMII_MDI0	0x80000000
+#define ZMII_SMII0	0x40000000
+#define ZMII_RMII0	0x20000000
+#define ZMII_MII0	0x10000000
+#define ZMII_MDI1	0x08000000
+#define ZMII_SMII1	0x04000000
+#define ZMII_RMII1	0x02000000
+#define ZMII_MII1	0x01000000
+#define ZMII_MDI2	0x00800000
+#define ZMII_SMII2	0x00400000
+#define ZMII_RMII2	0x00200000
+#define ZMII_MII2	0x00100000
+#define ZMII_MDI3	0x00080000
+#define ZMII_SMII3	0x00040000
+#define ZMII_RMII3	0x00020000
+#define ZMII_MII3	0x00010000
+
+/* Speed Selection reg */
+
+#define ZMII_SCI0	0x40000000
+#define ZMII_FSS0	0x20000000
+#define ZMII_SP0	0x10000000
+#define ZMII_SCI1	0x04000000
+#define ZMII_FSS1	0x02000000
+#define ZMII_SP1	0x01000000
+#define ZMII_SCI2	0x00400000
+#define ZMII_FSS2	0x00200000
+#define ZMII_SP2	0x00100000
+#define ZMII_SCI3	0x00040000
+#define ZMII_FSS3	0x00020000
+#define ZMII_SP3	0x00010000
+
+#define ZMII_MII0_100MB	ZMII_SP0
+#define ZMII_MII0_10MB	~ZMII_SP0
+#define ZMII_MII1_100MB	ZMII_SP1
+#define ZMII_MII1_10MB	~ZMII_SP1
+#define ZMII_MII2_100MB	ZMII_SP2
+#define ZMII_MII2_10MB	~ZMII_SP2
+#define ZMII_MII3_100MB	ZMII_SP3
+#define ZMII_MII3_10MB	~ZMII_SP3
+
+/* SMII Status reg */
+
+#define ZMII_STS0 0xFF000000	/* EMAC0 smii status mask */
+#define ZMII_STS1 0x00FF0000	/* EMAC1 smii status mask */
+
+#define SMII	0
+#define RMII	1
+#define MII	2
+#define MDI	3
+
+#endif				/* _IBM_EMAC_ZMII_H_ */