Patch by Travis Sawyer, 30 Dec 2003:

Add support for IBM PPC440GX. Multiple EMAC Ethernet devices,
select MDI port based on enabled EMAC device.
Add support for XES Inc <http://www.xes-inc.com> XPedite1000 440GX
base PrPMC board.

1 files changed, 1144 insertions, 0 deletions

diff --git a/cpu/ppc4xx/440gx_enet.c b/cpu/ppc4xx/440gx_enet.c
new file mode 100644
index 0000000..617a174
--- /dev/null
+++ b/cpu/ppc4xx/440gx_enet.c
@@ -0,0 +1,1144 @@
+/*-----------------------------------------------------------------------------+
+ *
+ *       This source code has been made available to you by IBM on an AS-IS
+ *       basis.  Anyone receiving this source is licensed under IBM
+ *       copyrights to use it in any way he or she deems fit, including
+ *       copying it, modifying it, compiling it, and redistributing it either
+ *       with or without modifications.  No license under IBM patents or
+ *       patent applications is to be implied by the copyright license.
+ *
+ *       Any user of this software should understand that IBM cannot provide
+ *       technical support for this software and will not be responsible for
+ *       any consequences resulting from the use of this software.
+ *
+ *       Any person who transfers this source code or any derivative work
+ *       must include the IBM copyright notice, this paragraph, and the
+ *       preceding two paragraphs in the transferred software.
+ *
+ *       COPYRIGHT   I B M   CORPORATION 1995
+ *       LICENSED MATERIAL  -  PROGRAM PROPERTY OF I B M
+ *-----------------------------------------------------------------------------*/
+/*-----------------------------------------------------------------------------+
+ *
+ *  File Name:  enetemac.c
+ *
+ *  Function:   Device driver for the ethernet EMAC3 macro on the 405GP.
+ *
+ *  Author:     Mark Wisner
+ *
+ *  Change Activity-
+ *
+ *  Date        Description of Change                                       BY
+ *  ---------   ---------------------                                       ---
+ *  05-May-99   Created                                                     MKW
+ *  27-Jun-99   Clean up                                                    JWB
+ *  16-Jul-99   Added MAL error recovery and better IP packet handling      MKW
+ *  29-Jul-99   Added Full duplex support                                   MKW
+ *  06-Aug-99   Changed names for Mal CR reg                                MKW
+ *  23-Aug-99   Turned off SYE when running at 10Mbs                        MKW
+ *  24-Aug-99   Marked descriptor empty after call_xlc                      MKW
+ *  07-Sep-99   Set MAL RX buffer size reg to ENET_MAX_MTU_ALIGNED / 16     MCG
+ *              to avoid chaining maximum sized packets. Push starting
+ *              RX descriptor address up to the next cache line boundary.
+ *  16-Jan-00   Added support for booting with IP of 0x0                    MKW
+ *  15-Mar-00   Updated enetInit() to enable broadcast addresses in the
+ *	        EMAC_RXM register.                                          JWB
+ *  12-Mar-01   anne-sophie.harnois@nextream.fr
+ *               - Variables are compatible with those already defined in
+ *                include/net.h
+ *              - Receive buffer descriptor ring is used to send buffers
+ *                to the user
+ *              - Info print about send/received/handled packet number if
+ *                INFO_405_ENET is set
+ *  17-Apr-01   stefan.roese@esd-electronics.com
+ *              - MAL reset in "eth_halt" included
+ *              - Enet speed and duplex output now in one line
+ *  08-May-01   stefan.roese@esd-electronics.com
+ *              - MAL error handling added (eth_init called again)
+ *  13-Nov-01   stefan.roese@esd-electronics.com
+ *              - Set IST bit in EMAC_M1 reg upon 100MBit or full duplex
+ *  04-Jan-02   stefan.roese@esd-electronics.com
+ *              - Wait for PHY auto negotiation to complete added
+ *  06-Feb-02   stefan.roese@esd-electronics.com
+ *              - Bug fixed in waiting for auto negotiation to complete
+ *  26-Feb-02   stefan.roese@esd-electronics.com
+ *              - rx and tx buffer descriptors now allocated (no fixed address
+ *                used anymore)
+ *  17-Jun-02   stefan.roese@esd-electronics.com
+ *              - MAL error debug printf 'M' removed (rx de interrupt may
+ *                occur upon many incoming packets with only 4 rx buffers).
+ *-----------------------------------------------------------------------------*
+ *  17-Nov-03   travis.sawyer@sandburst.com
+ *              - ported from 405gp_enet.c to utilized upto 4 EMAC ports
+ *                in the 440GX.  This port should work with the 440GP
+ *                (2 EMACs) also
+ *-----------------------------------------------------------------------------*/
+
+#include <config.h>
+#if defined(CONFIG_440) && defined(CONFIG_NET_MULTI)
+
+#include <common.h>
+#include <net.h>
+#include <asm/processor.h>
+#include <ppc440.h>
+#include <commproc.h>
+#include <440gx_enet.h>
+#include <405_mal.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include "vecnum.h"
+
+
+#define EMAC_RESET_TIMEOUT 1000	/* 1000 ms reset timeout */
+#define PHY_AUTONEGOTIATE_TIMEOUT 4000	/* 4000 ms autonegotiate timeout */
+
+
+/* Ethernet Transmit and Receive Buffers */
+/* AS.HARNOIS
+ * In the same way ENET_MAX_MTU and ENET_MAX_MTU_ALIGNED are set from
+ * PKTSIZE and PKTSIZE_ALIGN (include/net.h)
+ */
+#define ENET_MAX_MTU           PKTSIZE
+#define ENET_MAX_MTU_ALIGNED   PKTSIZE_ALIGN
+
+
+/* define the number of channels implemented */
+#define EMAC_RXCHL      EMAC_NUM_DEV
+#define EMAC_TXCHL      EMAC_NUM_DEV
+
+/*-----------------------------------------------------------------------------+
+ * Defines for MAL/EMAC interrupt conditions as reported in the UIC (Universal
+ * Interrupt Controller).
+ *-----------------------------------------------------------------------------*/
+#define MAL_UIC_ERR ( UIC_MAL_SERR | UIC_MAL_TXDE  | UIC_MAL_RXDE)
+#define MAL_UIC_DEF  (UIC_MAL_RXEOB | MAL_UIC_ERR)
+#define EMAC_UIC_DEF UIC_ENET
+
+#undef INFO_440_ENET
+
+/*-----------------------------------------------------------------------------+
+ * Global variables. TX and RX descriptors and buffers.
+ *-----------------------------------------------------------------------------*/
+/* IER globals */
+static uint32_t mal_ier;
+
+/*-----------------------------------------------------------------------------+
+ * Prototypes and externals.
+ *-----------------------------------------------------------------------------*/
+static void enet_rcv (struct eth_device *dev, unsigned long malisr);
+
+int enetInt (struct eth_device *dev);
+static void mal_err (struct eth_device *dev, unsigned long isr,
+		     unsigned long uic, unsigned long maldef,
+		     unsigned long mal_errr);
+static void emac_err (struct eth_device *dev, unsigned long isr);
+
+/*-----------------------------------------------------------------------------+
+| ppc_440x_eth_halt
+| Disable MAL channel, and EMACn
+|
+|
++-----------------------------------------------------------------------------*/
+static void ppc_440x_eth_halt (struct eth_device *dev)
+{
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+	uint32_t failsafe = 10000;
+
+	out32 (EMAC_IER + hw_p->hw_addr, 0x00000000);	/* disable emac interrupts */
+
+	/* 1st reset MAL channel */
+	/* Note: writing a 0 to a channel has no effect */
+	mtdcr (maltxcarr, (MAL_CR_MMSR >> hw_p->devnum));
+	mtdcr (malrxcarr, (MAL_CR_MMSR >> hw_p->devnum));
+
+	/* wait for reset */
+	while (mfdcr (maltxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
+		udelay (1000);	/* Delay 1 MS so as not to hammer the register */
+		failsafe--;
+		if (failsafe == 0)
+			break;
+
+	}
+
+	/* EMAC RESET */
+	out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);
+
+	hw_p->print_speed = 1;	/* print speed message again next time */
+
+	return;
+}
+
+extern int phy_setup_aneg (unsigned char addr);
+extern int miiphy_reset (unsigned char addr);
+
+static int ppc_440x_eth_init (struct eth_device *dev, bd_t * bis)
+{
+	int i;
+	unsigned long reg;
+	unsigned long msr;
+	unsigned long speed;
+	unsigned long duplex;
+	unsigned long failsafe;
+	unsigned mode_reg;
+	unsigned short devnum;
+	unsigned short reg_short;
+	sys_info_t sysinfo;
+
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	/* before doing anything, figure out if we have a MAC address */
+	/* if not, bail */
+	if (memcmp (dev->enetaddr, "\0\0\0\0\0\0", 6) == 0)
+		return -1;
+
+	/* Need to get the OPB frequency so we can access the PHY */
+	get_sys_info (&sysinfo);
+
+
+	msr = mfmsr ();
+	mtmsr (msr & ~(MSR_EE));	/* disable interrupts */
+
+	devnum = hw_p->devnum;
+
+#ifdef INFO_440_ENET
+	/* AS.HARNOIS
+	 * We should have :
+	 * hw_p->stats.pkts_handled <=  hw_p->stats.pkts_rx <= hw_p->stats.pkts_handled+PKTBUFSRX
+	 * In the most cases hw_p->stats.pkts_handled = hw_p->stats.pkts_rx, but it
+	 * is possible that new packets (without relationship with
+	 * current transfer) have got the time to arrived before
+	 * netloop calls eth_halt
+	 */
+	printf ("About preceeding transfer (eth%d):\n"
+		"- Sent packet number %d\n"
+		"- Received packet number %d\n"
+		"- Handled packet number %d\n",
+		hw_p->devnum,
+		hw_p->stats.pkts_tx,
+		hw_p->stats.pkts_rx, hw_p->stats.pkts_handled);
+
+	hw_p->stats.pkts_tx = 0;
+	hw_p->stats.pkts_rx = 0;
+	hw_p->stats.pkts_handled = 0;
+#endif
+
+	/* MAL Channel RESET */
+	/* 1st reset MAL channel */
+	/* Note: writing a 0 to a channel has no effect */
+	mtdcr (maltxcarr, (MAL_TXRX_CASR >> hw_p->devnum));
+	mtdcr (malrxcarr, (MAL_TXRX_CASR >> hw_p->devnum));
+
+	/* wait for reset */
+	/* TBS:  should have udelay and failsafe here */
+	failsafe = 10000;
+	/* wait for reset */
+	while (mfdcr (maltxcasr) & (MAL_CR_MMSR >> hw_p->devnum)) {
+		udelay (1000);	/* Delay 1 MS so as not to hammer the register */
+		failsafe--;
+		if (failsafe == 0)
+			break;
+
+	}
+
+	hw_p->tx_err_index = 0;	/* Transmit Error Index for tx_err_log */
+	hw_p->rx_err_index = 0;	/* Receive Error Index for rx_err_log */
+
+	hw_p->rx_slot = 0;	/* MAL Receive Slot */
+	hw_p->rx_i_index = 0;	/* Receive Interrupt Queue Index */
+	hw_p->rx_u_index = 0;	/* Receive User Queue Index */
+
+	hw_p->tx_slot = 0;	/* MAL Transmit Slot */
+	hw_p->tx_i_index = 0;	/* Transmit Interrupt Queue Index */
+	hw_p->tx_u_index = 0;	/* Transmit User Queue Index */
+
+	/* set RMII mode */
+	/* NOTE: 440GX spec states that mode is mutually exclusive */
+	/* NOTE: Therefore, disable all other EMACS, since we handle */
+	/* NOTE: only one emac at a time */
+	reg = 0;
+	out32 (ZMII_FER, 0);
+	udelay (100);
+	out32 (ZMII_FER, ZMII_FER_MDI << ZMII_FER_V (devnum));
+	out32 (ZMII_SSR, 0x11110000);
+	/* reset emac so we have access to the phy */
+	__asm__ volatile ("eieio");
+
+	out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_SRST);
+	__asm__ volatile ("eieio");
+
+	if ((devnum == 2) || (devnum == 3))
+		out32 (RGMII_FER, ((RGMII_FER_RGMII << RGMII_FER_V (2)) |
+				   (RGMII_FER_RGMII << RGMII_FER_V (3))));
+	__asm__ volatile ("eieio");
+
+	failsafe = 1000;
+	while ((in32 (EMAC_M0 + hw_p->hw_addr) & (EMAC_M0_SRST)) && failsafe) {
+		udelay (1000);
+		failsafe--;
+	}
+
+	/* Whack the M1 register */
+	mode_reg = 0x0;
+	mode_reg &= ~0x00000038;
+	if (sysinfo.freqOPB <= 50000000);
+	else if (sysinfo.freqOPB <= 66666667)
+		mode_reg |= EMAC_M1_OBCI_66;
+	else if (sysinfo.freqOPB <= 83333333)
+		mode_reg |= EMAC_M1_OBCI_83;
+	else if (sysinfo.freqOPB <= 100000000)
+		mode_reg |= EMAC_M1_OBCI_100;
+	else
+		mode_reg |= EMAC_M1_OBCI_GT100;
+
+	out32 (EMAC_M1 + hw_p->hw_addr, mode_reg);
+
+
+	/* wait for PHY to complete auto negotiation */
+	reg_short = 0;
+#ifndef CONFIG_CS8952_PHY
+	switch (devnum) {
+	case 0:
+		reg = CONFIG_PHY_ADDR;
+		break;
+	case 1:
+		reg = CONFIG_PHY1_ADDR;
+		break;
+#if defined (CONFIG_440_GX)
+	case 2:
+		reg = CONFIG_PHY2_ADDR;
+		break;
+	case 3:
+		reg = CONFIG_PHY3_ADDR;
+		break;
+#endif
+	default:
+		reg = CONFIG_PHY_ADDR;
+		break;
+	}
+
+	/* Reset the phy */
+	miiphy_reset (reg);
+
+	/* Start/Restart autonegotiation */
+/*	miiphy_write(reg, PHY_BMCR, 0x9340); */
+	phy_setup_aneg (reg);
+	udelay (1000);
+
+	miiphy_read (reg, PHY_BMSR, &reg_short);
+
+	/*
+	 * Wait if PHY is able of autonegotiation and autonegotiation is not complete
+	 */
+	if ((reg_short & PHY_BMSR_AUTN_ABLE)
+	    && !(reg_short & PHY_BMSR_AUTN_COMP)) {
+		puts ("Waiting for PHY auto negotiation to complete");
+		i = 0;
+		while (!(reg_short & PHY_BMSR_AUTN_COMP)) {
+			/*
+			 * Timeout reached ?
+			 */
+			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
+				puts (" TIMEOUT !\n");
+				break;
+			}
+
+			if ((i++ % 1000) == 0) {
+				putc ('.');
+			}
+			udelay (1000);	/* 1 ms */
+			miiphy_read (reg, PHY_BMSR, &reg_short);
+
+		}
+		puts (" done\n");
+		udelay (500000);	/* another 500 ms (results in faster booting) */
+	}
+#endif
+	speed = miiphy_speed (reg);
+	duplex = miiphy_duplex (reg);
+
+	if (hw_p->print_speed) {
+		hw_p->print_speed = 0;
+		printf ("ENET Speed is %d Mbps - %s duplex connection\n",
+			(int) speed, (duplex == HALF) ? "HALF" : "FULL");
+	}
+
+	/* Set ZMII/RGMII speed according to the phy link speed */
+	reg = in32 (ZMII_SSR);
+	if (speed == 100)
+		out32 (ZMII_SSR, reg | (ZMII_SSR_SP << ZMII_SSR_V (devnum)));
+	else
+		out32 (ZMII_SSR,
+		       reg & (~(ZMII_SSR_SP << ZMII_SSR_V (devnum))));
+
+	if ((devnum == 2) || (devnum == 3)) {
+		if (speed == 1000)
+			reg = (RGMII_SSR_SP_1000MBPS << RGMII_SSR_V (devnum));
+		else if (speed == 100)
+			reg = (RGMII_SSR_SP_100MBPS << RGMII_SSR_V (devnum));
+		else
+			reg = (RGMII_SSR_SP_10MBPS << RGMII_SSR_V (devnum));
+
+		out32 (RGMII_SSR, reg);
+	}
+
+	/* set the Mal configuration reg */
+	/* Errata 1.12: MAL_1 -- Disable MAL bursting */
+	if (get_pvr () == PVR_440GP_RB)
+		mtdcr (malmcr,
+		       MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
+	else
+		mtdcr (malmcr,
+		       MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA |
+		       MAL_CR_PLBLT_DEFAULT | MAL_CR_EOPIE | 0x00330000);
+
+	/* Free "old" buffers */
+	if (hw_p->alloc_tx_buf)
+		free (hw_p->alloc_tx_buf);
+	if (hw_p->alloc_rx_buf)
+		free (hw_p->alloc_rx_buf);
+
+	/*
+	 * Malloc MAL buffer desciptors, make sure they are
+	 * aligned on cache line boundary size
+	 * (401/403/IOP480 = 16, 405 = 32)
+	 * and doesn't cross cache block boundaries.
+	 */
+	hw_p->alloc_tx_buf =
+		(mal_desc_t *) malloc ((sizeof (mal_desc_t) * NUM_TX_BUFF) +
+				       ((2 * CFG_CACHELINE_SIZE) - 2));
+	if (((int) hw_p->alloc_tx_buf & CACHELINE_MASK) != 0) {
+		hw_p->tx =
+			(mal_desc_t *) ((int) hw_p->alloc_tx_buf +
+					CFG_CACHELINE_SIZE -
+					((int) hw_p->
+					 alloc_tx_buf & CACHELINE_MASK));
+	} else {
+		hw_p->tx = hw_p->alloc_tx_buf;
+	}
+
+	hw_p->alloc_rx_buf =
+		(mal_desc_t *) malloc ((sizeof (mal_desc_t) * NUM_RX_BUFF) +
+				       ((2 * CFG_CACHELINE_SIZE) - 2));
+	if (((int) hw_p->alloc_rx_buf & CACHELINE_MASK) != 0) {
+		hw_p->rx =
+			(mal_desc_t *) ((int) hw_p->alloc_rx_buf +
+					CFG_CACHELINE_SIZE -
+					((int) hw_p->
+					 alloc_rx_buf & CACHELINE_MASK));
+	} else {
+		hw_p->rx = hw_p->alloc_rx_buf;
+	}
+
+	for (i = 0; i < NUM_TX_BUFF; i++) {
+		hw_p->tx[i].ctrl = 0;
+		hw_p->tx[i].data_len = 0;
+		if (hw_p->first_init == 0)
+			hw_p->txbuf_ptr =
+				(char *) malloc (ENET_MAX_MTU_ALIGNED);
+		hw_p->tx[i].data_ptr = hw_p->txbuf_ptr;
+		if ((NUM_TX_BUFF - 1) == i)
+			hw_p->tx[i].ctrl |= MAL_TX_CTRL_WRAP;
+		hw_p->tx_run[i] = -1;
+#if 0
+		printf ("TX_BUFF %d @ 0x%08lx\n", i,
+			(ulong) hw_p->tx[i].data_ptr);
+#endif
+	}
+
+	for (i = 0; i < NUM_RX_BUFF; i++) {
+		hw_p->rx[i].ctrl = 0;
+		hw_p->rx[i].data_len = 0;
+		/*       rx[i].data_ptr = (char *) &rx_buff[i]; */
+		hw_p->rx[i].data_ptr = (char *) NetRxPackets[i];
+		if ((NUM_RX_BUFF - 1) == i)
+			hw_p->rx[i].ctrl |= MAL_RX_CTRL_WRAP;
+		hw_p->rx[i].ctrl |= MAL_RX_CTRL_EMPTY | MAL_RX_CTRL_INTR;
+		hw_p->rx_ready[i] = -1;
+#if 0
+		printf ("RX_BUFF %d @ 0x%08lx\n", i, (ulong) rx[i].data_ptr);
+#endif
+	}
+
+	reg = 0x00000000;
+
+	reg |= dev->enetaddr[0];	/* set high address */
+	reg = reg << 8;
+	reg |= dev->enetaddr[1];
+
+	out32 (EMAC_IAH + hw_p->hw_addr, reg);
+
+	reg = 0x00000000;
+	reg |= dev->enetaddr[2];	/* set low address  */
+	reg = reg << 8;
+	reg |= dev->enetaddr[3];
+	reg = reg << 8;
+	reg |= dev->enetaddr[4];
+	reg = reg << 8;
+	reg |= dev->enetaddr[5];
+
+	out32 (EMAC_IAL + hw_p->hw_addr, reg);
+
+	switch (devnum) {
+	case 1:
+		/* setup MAL tx & rx channel pointers */
+		mtdcr (maltxbattr, 0x0);
+		mtdcr (maltxctp1r, hw_p->tx);
+		mtdcr (malrxbattr, 0x0);
+		mtdcr (malrxctp1r, hw_p->rx);
+		/* set RX buffer size */
+		mtdcr (malrcbs1, ENET_MAX_MTU_ALIGNED / 16);
+		break;
+#if defined (CONFIG_440_GX)
+	case 2:
+		/* setup MAL tx & rx channel pointers */
+		mtdcr (maltxbattr, 0x0);
+		mtdcr (maltxctp2r, hw_p->tx);
+		mtdcr (malrxbattr, 0x0);
+		mtdcr (malrxctp2r, hw_p->rx);
+		/* set RX buffer size */
+		mtdcr (malrcbs2, ENET_MAX_MTU_ALIGNED / 16);
+		break;
+	case 3:
+		/* setup MAL tx & rx channel pointers */
+		mtdcr (maltxbattr, 0x0);
+		mtdcr (maltxctp3r, hw_p->tx);
+		mtdcr (malrxbattr, 0x0);
+		mtdcr (malrxctp3r, hw_p->rx);
+		/* set RX buffer size */
+		mtdcr (malrcbs3, ENET_MAX_MTU_ALIGNED / 16);
+		break;
+#endif /*CONFIG_440_GX */
+	case 0:
+	default:
+		/* setup MAL tx & rx channel pointers */
+		mtdcr (maltxbattr, 0x0);
+		mtdcr (maltxctp0r, hw_p->tx);
+		mtdcr (malrxbattr, 0x0);
+		mtdcr (malrxctp0r, hw_p->rx);
+		/* set RX buffer size */
+		mtdcr (malrcbs0, ENET_MAX_MTU_ALIGNED / 16);
+		break;
+	}
+
+	/* Enable MAL transmit and receive channels */
+	mtdcr (maltxcasr, (MAL_TXRX_CASR >> hw_p->devnum));
+	mtdcr (malrxcasr, (MAL_TXRX_CASR >> hw_p->devnum));
+
+	/* set transmit enable & receive enable */
+	out32 (EMAC_M0 + hw_p->hw_addr, EMAC_M0_TXE | EMAC_M0_RXE);
+
+	/* set receive fifo to 4k and tx fifo to 2k */
+	mode_reg = in32 (EMAC_M1 + hw_p->hw_addr);
+	mode_reg |= EMAC_M1_RFS_4K | EMAC_M1_TX_FIFO_2K;
+
+	/* set speed */
+	/* TBS: do 1GbE */
+	if (speed == _100BASET)
+		mode_reg = mode_reg | EMAC_M1_MF_100MBPS | EMAC_M1_IST;
+	else
+		mode_reg = mode_reg & ~0x00C00000;	/* 10 MBPS */
+	if (duplex == FULL)
+		mode_reg = mode_reg | 0x80000000 | EMAC_M1_IST;
+
+	out32 (EMAC_M1 + hw_p->hw_addr, mode_reg);
+
+	/* Enable broadcast and indvidual address */
+	/* TBS: enabling runts as some misbehaved nics will send runts */
+	out32 (EMAC_RXM + hw_p->hw_addr, EMAC_RMR_BAE | EMAC_RMR_IAE);
+
+	/* we probably need to set the tx mode1 reg? maybe at tx time */
+
+	/* set transmit request threshold register */
+	out32 (EMAC_TRTR + hw_p->hw_addr, 0x18000000);	/* 256 byte threshold */
+
+	/* set receive  low/high water mark register */
+	/* 440GP has a 64 byte burst length */
+	out32 (EMAC_RX_HI_LO_WMARK + hw_p->hw_addr, 0x80009000);
+	out32 (EMAC_TXM1 + hw_p->hw_addr, 0xf8640000);
+
+	/* Set fifo limit entry in tx mode 0 */
+	out32 (EMAC_TXM0 + hw_p->hw_addr, 0x00000003);
+	/* Frame gap set */
+	out32 (EMAC_I_FRAME_GAP_REG + hw_p->hw_addr, 0x00000008);
+
+	/* Set EMAC IER */
+	hw_p->emac_ier = EMAC_ISR_PTLE | EMAC_ISR_BFCS |
+		EMAC_ISR_PTLE | EMAC_ISR_ORE | EMAC_ISR_IRE;
+	if (speed == _100BASET)
+		hw_p->emac_ier = hw_p->emac_ier | EMAC_ISR_SYE;
+
+	out32 (EMAC_ISR + hw_p->hw_addr, 0xffffffff);	/* clear pending interrupts */
+	out32 (EMAC_IER + hw_p->hw_addr, hw_p->emac_ier);
+
+	if (hw_p->first_init == 0) {
+		/*
+		 * Connect interrupt service routines
+		 */
+		irq_install_handler (VECNUM_EWU0 + (hw_p->devnum * 2),
+				     (interrupt_handler_t *) enetInt, dev);
+		irq_install_handler (VECNUM_ETH0 + (hw_p->devnum * 2),
+				     (interrupt_handler_t *) enetInt, dev);
+	}
+#if 0				/* done by irq_install_handler */
+	/* set up interrupt handler */
+	/* setup interrupt controller to take interrupts from the MAL &
+	   EMAC */
+	mtdcr (uicsr, 0xffffffff);	/* clear pending interrupts */
+	mtdcr (uicer, mfdcr (uicer) | MAL_UIC_DEF | EMAC_UIC_DEF);
+#endif
+
+	mtmsr (msr);		/* enable interrupts again */
+
+	hw_p->bis = bis;
+	hw_p->first_init = 1;
+
+	return (1);
+}
+
+
+static int ppc_440x_eth_send (struct eth_device *dev, volatile void *ptr,
+			      int len)
+{
+	struct enet_frame *ef_ptr;
+	ulong time_start, time_now;
+	unsigned long temp_txm0;
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	ef_ptr = (struct enet_frame *) ptr;
+
+	/*-----------------------------------------------------------------------+
+	 *  Copy in our address into the frame.
+	 *-----------------------------------------------------------------------*/
+	(void) memcpy (ef_ptr->source_addr, dev->enetaddr, ENET_ADDR_LENGTH);
+
+	/*-----------------------------------------------------------------------+
+	 * If frame is too long or too short, modify length.
+	 *-----------------------------------------------------------------------*/
+	/* TBS: where does the fragment go???? */
+	if (len > ENET_MAX_MTU)
+		len = ENET_MAX_MTU;
+
+	/*   memcpy ((void *) &tx_buff[tx_slot], (const void *) ptr, len); */
+	memcpy ((void *) hw_p->txbuf_ptr, (const void *) ptr, len);
+
+	/*-----------------------------------------------------------------------+
+	 * set TX Buffer busy, and send it
+	 *-----------------------------------------------------------------------*/
+	hw_p->tx[hw_p->tx_slot].ctrl = (MAL_TX_CTRL_LAST |
+					EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP) &
+		~(EMAC_TX_CTRL_ISA | EMAC_TX_CTRL_RSA);
+	if ((NUM_TX_BUFF - 1) == hw_p->tx_slot)
+		hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_WRAP;
+
+	hw_p->tx[hw_p->tx_slot].data_len = (short) len;
+	hw_p->tx[hw_p->tx_slot].ctrl |= MAL_TX_CTRL_READY;
+
+	__asm__ volatile ("eieio");
+
+	out32 (EMAC_TXM0 + hw_p->hw_addr,
+	       in32 (EMAC_TXM0 + hw_p->hw_addr) | EMAC_TXM0_GNP0);
+#ifdef INFO_440_ENET
+	hw_p->stats.pkts_tx++;
+#endif
+
+	/*-----------------------------------------------------------------------+
+	 * poll unitl the packet is sent and then make sure it is OK
+	 *-----------------------------------------------------------------------*/
+	time_start = get_timer (0);
+	while (1) {
+		temp_txm0 = in32 (EMAC_TXM0 + hw_p->hw_addr);
+		/* loop until either TINT turns on or 3 seconds elapse */
+		if ((temp_txm0 & EMAC_TXM0_GNP0) != 0) {
+			/* transmit is done, so now check for errors
+			 * If there is an error, an interrupt should
+			 * happen when we return
+			 */
+			time_now = get_timer (0);
+			if ((time_now - time_start) > 3000) {
+				return (-1);
+			}
+		} else {
+			return (len);
+		}
+	}
+}
+
+
+int enetInt (struct eth_device *dev)
+{
+	int serviced;
+	int rc = -1;		/* default to not us */
+	unsigned long mal_isr;
+	unsigned long emac_isr = 0;
+	unsigned long mal_rx_eob;
+	unsigned long my_uic0msr, my_uic1msr;
+
+#if defined(CONFIG_440_GX)
+	unsigned long my_uic2msr;
+#endif
+	EMAC_440GX_HW_PST hw_p;
+
+	/*
+	 * Because the mal is generic, we need to get the current
+	 * eth device
+	 */
+	dev = eth_get_dev ();
+
+	hw_p = dev->priv;
+
+
+	/* enter loop that stays in interrupt code until nothing to service */
+	do {
+		serviced = 0;
+
+		my_uic0msr = mfdcr (uic0msr);
+		my_uic1msr = mfdcr (uic1msr);
+#if defined(CONFIG_440_GX)
+		my_uic2msr = mfdcr (uic2msr);
+#endif
+		if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
+		    && !(my_uic1msr &
+			 (UIC_ETH0 | UIC_ETH1 | UIC_MS | UIC_MTDE |
+			  UIC_MRDE))) {
+			/* not for us */
+			return (rc);
+		}
+#if defined (CONFIG_440_GX)
+		if (!(my_uic0msr & (UIC_MRE | UIC_MTE))
+		    && !(my_uic2msr & (UIC_ETH2 | UIC_ETH3))) {
+			/* not for us */
+			return (rc);
+		}
+#endif
+		/* get and clear controller status interrupts */
+		/* look at Mal and EMAC interrupts */
+		if ((my_uic0msr & (UIC_MRE | UIC_MTE))
+		    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
+			/* we have a MAL interrupt */
+			mal_isr = mfdcr (malesr);
+			/* look for mal error */
+			if (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE)) {
+				mal_err (dev, mal_isr, my_uic0msr,
+					 MAL_UIC_DEF, MAL_UIC_ERR);
+				serviced = 1;
+				rc = 0;
+			}
+		}
+
+		/* port by port dispatch of emac interrupts */
+		if (hw_p->devnum == 0) {
+			if (UIC_ETH0 & my_uic1msr) {	/* look for EMAC errors */
+				emac_isr = in32 (EMAC_ISR + hw_p->hw_addr);
+				if ((hw_p->emac_ier & emac_isr) != 0) {
+					emac_err (dev, emac_isr);
+					serviced = 1;
+					rc = 0;
+				}
+			}
+			if ((hw_p->emac_ier & emac_isr)
+			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
+				mtdcr (uic0sr, UIC_MRE | UIC_MTE);	/* Clear */
+				mtdcr (uic1sr, UIC_ETH0 | UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
+				return (rc);	/* we had errors so get out */
+			}
+		}
+
+		if (hw_p->devnum == 1) {
+			if (UIC_ETH1 & my_uic1msr) {	/* look for EMAC errors */
+				emac_isr = in32 (EMAC_ISR + hw_p->hw_addr);
+				if ((hw_p->emac_ier & emac_isr) != 0) {
+					emac_err (dev, emac_isr);
+					serviced = 1;
+					rc = 0;
+				}
+			}
+			if ((hw_p->emac_ier & emac_isr)
+			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
+				mtdcr (uic0sr, UIC_MRE | UIC_MTE);	/* Clear */
+				mtdcr (uic1sr, UIC_ETH1 | UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
+				return (rc);	/* we had errors so get out */
+			}
+		}
+#if defined (CONFIG_440_GX)
+		if (hw_p->devnum == 2) {
+			if (UIC_ETH2 & my_uic2msr) {	/* look for EMAC errors */
+				emac_isr = in32 (EMAC_ISR + hw_p->hw_addr);
+				if ((hw_p->emac_ier & emac_isr) != 0) {
+					emac_err (dev, emac_isr);
+					serviced = 1;
+					rc = 0;
+				}
+			}
+			if ((hw_p->emac_ier & emac_isr)
+			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
+				mtdcr (uic0sr, UIC_MRE | UIC_MTE);	/* Clear */
+				mtdcr (uic1sr, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
+				mtdcr (uic2sr, UIC_ETH2);
+				return (rc);	/* we had errors so get out */
+			}
+		}
+
+		if (hw_p->devnum == 3) {
+			if (UIC_ETH3 & my_uic2msr) {	/* look for EMAC errors */
+				emac_isr = in32 (EMAC_ISR + hw_p->hw_addr);
+				if ((hw_p->emac_ier & emac_isr) != 0) {
+					emac_err (dev, emac_isr);
+					serviced = 1;
+					rc = 0;
+				}
+			}
+			if ((hw_p->emac_ier & emac_isr)
+			    || (my_uic1msr & (UIC_MS | UIC_MTDE | UIC_MRDE))) {
+				mtdcr (uic0sr, UIC_MRE | UIC_MTE);	/* Clear */
+				mtdcr (uic1sr, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
+				mtdcr (uic2sr, UIC_ETH3);
+				return (rc);	/* we had errors so get out */
+			}
+		}
+#endif /* CONFIG_440_GX */
+		/* handle MAX TX EOB interrupt from a tx */
+		if (my_uic0msr & UIC_MTE) {
+			mal_rx_eob = mfdcr (maltxeobisr);
+			mtdcr (maltxeobisr, mal_rx_eob);
+			mtdcr (uic0sr, UIC_MTE);
+		}
+		/* handle MAL RX EOB  interupt from a receive */
+		/* check for EOB on valid channels            */
+		if (my_uic0msr & UIC_MRE) {
+			mal_rx_eob = mfdcr (malrxeobisr);
+			if ((mal_rx_eob & (0x80000000 >> hw_p->devnum)) != 0) {	/* call emac routine for channel x */
+				/* clear EOB
+				   mtdcr(malrxeobisr, mal_rx_eob); */
+				enet_rcv (dev, emac_isr);
+				/* indicate that we serviced an interrupt */
+				serviced = 1;
+				rc = 0;
+			}
+		}
+		mtdcr (uic0sr, UIC_MRE);	/* Clear */
+		mtdcr (uic1sr, UIC_MS | UIC_MTDE | UIC_MRDE);	/* Clear */
+		switch (hw_p->devnum) {
+		case 0:
+			mtdcr (uic1sr, UIC_ETH0);
+			break;
+		case 1:
+			mtdcr (uic1sr, UIC_ETH1);
+			break;
+#if defined (CONFIG_440_GX)
+		case 2:
+			mtdcr (uic2sr, UIC_ETH2);
+			break;
+		case 3:
+			mtdcr (uic2sr, UIC_ETH3);
+			break;
+#endif /* CONFIG_440_GX */
+		default:
+			break;
+		}
+	} while (serviced);
+
+	return (rc);
+}
+
+/*-----------------------------------------------------------------------------+
+ *  MAL Error Routine
+ *-----------------------------------------------------------------------------*/
+static void mal_err (struct eth_device *dev, unsigned long isr,
+		     unsigned long uic, unsigned long maldef,
+		     unsigned long mal_errr)
+{
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	mtdcr (malesr, isr);	/* clear interrupt */
+
+	/* clear DE interrupt */
+	mtdcr (maltxdeir, 0xC0000000);
+	mtdcr (malrxdeir, 0x80000000);
+
+#ifdef INFO_440_ENET
+	printf ("\nMAL error occured.... ISR = %lx UIC = = %lx  MAL_DEF = %lx  MAL_ERR= %lx \n", isr, uic, maldef, mal_errr);
+#endif
+
+	eth_init (hw_p->bis);	/* start again... */
+}
+
+/*-----------------------------------------------------------------------------+
+ *  EMAC Error Routine
+ *-----------------------------------------------------------------------------*/
+static void emac_err (struct eth_device *dev, unsigned long isr)
+{
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	printf ("EMAC%d error occured.... ISR = %lx\n", hw_p->devnum, isr);
+	out32 (EMAC_ISR + hw_p->hw_addr, isr);
+}
+
+/*-----------------------------------------------------------------------------+
+ *  enet_rcv() handles the ethernet receive data
+ *-----------------------------------------------------------------------------*/
+static void enet_rcv (struct eth_device *dev, unsigned long malisr)
+{
+	struct enet_frame *ef_ptr;
+	unsigned long data_len;
+	unsigned long rx_eob_isr;
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	int handled = 0;
+	int i;
+	int loop_count = 0;
+
+	rx_eob_isr = mfdcr (malrxeobisr);
+	if ((0x80000000 >> hw_p->devnum) & rx_eob_isr) {
+		/* clear EOB */
+		mtdcr (malrxeobisr, rx_eob_isr);
+
+		/* EMAC RX done */
+		while (1) {	/* do all */
+			i = hw_p->rx_slot;
+
+			if ((MAL_RX_CTRL_EMPTY & hw_p->rx[i].ctrl)
+			    || (loop_count >= NUM_RX_BUFF))
+				break;
+			loop_count++;
+			hw_p->rx_slot++;
+			if (NUM_RX_BUFF == hw_p->rx_slot)
+				hw_p->rx_slot = 0;
+			handled++;
+			data_len = (unsigned long) hw_p->rx[i].data_len;	/* Get len */
+			if (data_len) {
+				if (data_len > ENET_MAX_MTU)	/* Check len */
+					data_len = 0;
+				else {
+					if (EMAC_RX_ERRORS & hw_p->rx[i].ctrl) {	/* Check Errors */
+						data_len = 0;
+						hw_p->stats.rx_err_log[hw_p->
+								       rx_err_index]
+							= hw_p->rx[i].ctrl;
+						hw_p->rx_err_index++;
+						if (hw_p->rx_err_index ==
+						    MAX_ERR_LOG)
+							hw_p->rx_err_index =
+								0;
+					}	/* emac_erros         */
+				}	/* data_len < max mtu */
+			}	/* if data_len        */
+			if (!data_len) {	/* no data */
+				hw_p->rx[i].ctrl |= MAL_RX_CTRL_EMPTY;	/* Free Recv Buffer */
+
+				hw_p->stats.data_len_err++;	/* Error at Rx */
+			}
+
+			/* !data_len */
+			/* AS.HARNOIS */
+			/* Check if user has already eaten buffer */
+			/* if not => ERROR */
+			else if (hw_p->rx_ready[hw_p->rx_i_index] != -1) {
+				if (hw_p->is_receiving)
+					printf ("ERROR : Receive buffers are full!\n");
+				break;
+			} else {
+				hw_p->stats.rx_frames++;
+				hw_p->stats.rx += data_len;
+				ef_ptr = (struct enet_frame *) hw_p->rx[i].
+					data_ptr;
+#ifdef INFO_440_ENET
+				hw_p->stats.pkts_rx++;
+#endif
+				/* AS.HARNOIS
+				 * use ring buffer
+				 */
+				hw_p->rx_ready[hw_p->rx_i_index] = i;
+				hw_p->rx_i_index++;
+				if (NUM_RX_BUFF == hw_p->rx_i_index)
+					hw_p->rx_i_index = 0;
+
+				/* printf("X");  /|* test-only *|/ */
+
+				/*  AS.HARNOIS
+				 * free receive buffer only when
+				 * buffer has been handled (eth_rx)
+				 rx[i].ctrl |= MAL_RX_CTRL_EMPTY;
+				 */
+			}	/* if data_len */
+		}		/* while */
+	}			/* if EMACK_RXCHL */
+}
+
+
+static int ppc_440x_eth_rx (struct eth_device *dev)
+{
+	int length;
+	int user_index;
+	unsigned long msr;
+	EMAC_440GX_HW_PST hw_p = dev->priv;
+
+	hw_p->is_receiving = 1;	/* tell driver */
+
+	for (;;) {
+		/* AS.HARNOIS
+		 * use ring buffer and
+		 * get index from rx buffer desciptor queue
+		 */
+		user_index = hw_p->rx_ready[hw_p->rx_u_index];
+		if (user_index == -1) {
+			length = -1;
+			break;	/* nothing received - leave for() loop */
+		}
+
+		msr = mfmsr ();
+		mtmsr (msr & ~(MSR_EE));
+
+		length = hw_p->rx[user_index].data_len;
+
+		/* Pass the packet up to the protocol layers. */
+		/*       NetReceive(NetRxPackets[rxIdx], length - 4); */
+		/*       NetReceive(NetRxPackets[i], length); */
+		NetReceive (NetRxPackets[user_index], length - 4);
+		/* Free Recv Buffer */
+		hw_p->rx[user_index].ctrl |= MAL_RX_CTRL_EMPTY;
+		/* Free rx buffer descriptor queue */
+		hw_p->rx_ready[hw_p->rx_u_index] = -1;
+		hw_p->rx_u_index++;
+		if (NUM_RX_BUFF == hw_p->rx_u_index)
+			hw_p->rx_u_index = 0;
+
+#ifdef INFO_440_ENET
+		hw_p->stats.pkts_handled++;
+#endif
+
+		mtmsr (msr);	/* Enable IRQ's */
+	}
+
+	hw_p->is_receiving = 0;	/* tell driver */
+
+	return length;
+}
+
+int ppc_440x_eth_initialize (bd_t * bis)
+{
+	static int virgin = 0;
+	unsigned long pfc1;
+	struct eth_device *dev;
+	int eth_num = 0;
+
+	EMAC_440GX_HW_PST hw = NULL;
+
+	mfsdr (sdr_pfc1, pfc1);
+	pfc1 &= ~(0x01e00000);
+	pfc1 |= 0x01200000;
+	mtsdr (sdr_pfc1, pfc1);
+
+	for (eth_num = 0; eth_num < EMAC_NUM_DEV; eth_num++) {
+
+		/* See if we can actually bring up the interface, otherwise, skip it */
+		switch (eth_num) {
+		case 0:
+			if (memcmp (bis->bi_enetaddr, "\0\0\0\0\0\0", 6) == 0)
+				continue;
+			break;
+		case 1:
+			if (memcmp (bis->bi_enet1addr, "\0\0\0\0\0\0", 6) ==
+			    0)
+				continue;
+			break;
+		case 2:
+			if (memcmp (bis->bi_enet2addr, "\0\0\0\0\0\0", 6) ==
+			    0)
+				continue;
+			break;
+		case 3:
+			if (memcmp (bis->bi_enet3addr, "\0\0\0\0\0\0", 6) ==
+			    0)
+				continue;
+			break;
+		default:
+			if (memcmp (bis->bi_enetaddr, "\0\0\0\0\0\0", 6) == 0)
+				continue;
+			break;
+		}
+
+		/* Allocate device structure */
+		dev = (struct eth_device *) malloc (sizeof (*dev));
+		if (dev == NULL) {
+			printf (__FUNCTION__
+				": Cannot allocate eth_device %d\n", eth_num);
+			return (-1);
+		}
+
+		/* Allocate our private use data */
+		hw = (EMAC_440GX_HW_PST) malloc (sizeof (*hw));
+		if (hw == NULL) {
+			printf (__FUNCTION__
+				": Cannot allocate private hw data for eth_device %d",
+				eth_num);
+			free (dev);
+			return (-1);
+		}
+
+		switch (eth_num) {
+		case 0:
+			hw->hw_addr = 0;
+			memcpy (dev->enetaddr, bis->bi_enetaddr, 6);
+			break;
+		case 1:
+			hw->hw_addr = 0x100;
+			memcpy (dev->enetaddr, bis->bi_enet1addr, 6);
+			break;
+		case 2:
+			hw->hw_addr = 0x400;
+			memcpy (dev->enetaddr, bis->bi_enet2addr, 6);
+			break;
+		case 3:
+			hw->hw_addr = 0x600;
+			memcpy (dev->enetaddr, bis->bi_enet3addr, 6);
+			break;
+		default:
+			hw->hw_addr = 0;
+			memcpy (dev->enetaddr, bis->bi_enetaddr, 6);
+			break;
+		}
+
+		hw->devnum = eth_num;
+
+		sprintf (dev->name, "ppc_440x_eth%d", eth_num);
+		dev->priv = (void *) hw;
+		dev->init = ppc_440x_eth_init;
+		dev->halt = ppc_440x_eth_halt;
+		dev->send = ppc_440x_eth_send;
+		dev->recv = ppc_440x_eth_rx;
+
+		if (0 == virgin) {
+			/* set the MAL IER ??? names may change with new spec ??? */
+			mal_ier =
+				MAL_IER_DE | MAL_IER_NE | MAL_IER_TE |
+				MAL_IER_OPBE | MAL_IER_PLBE;
+			mtdcr (malesr, 0xffffffff);	/* clear pending interrupts */
+			mtdcr (maltxdeir, 0xffffffff);	/* clear pending interrupts */
+			mtdcr (malrxdeir, 0xffffffff);	/* clear pending interrupts */
+			mtdcr (malier, mal_ier);
+
+			/* install MAL interrupt handler */
+			irq_install_handler (VECNUM_MS,
+					     (interrupt_handler_t *) enetInt,
+					     dev);
+			irq_install_handler (VECNUM_MTE,
+					     (interrupt_handler_t *) enetInt,
+					     dev);
+			irq_install_handler (VECNUM_MRE,
+					     (interrupt_handler_t *) enetInt,
+					     dev);
+			irq_install_handler (VECNUM_TXDE,
+					     (interrupt_handler_t *) enetInt,
+					     dev);
+			irq_install_handler (VECNUM_RXDE,
+					     (interrupt_handler_t *) enetInt,
+					     dev);
+			virgin = 1;
+		}
+
+		eth_register (dev);
+
+	}			/* end for each supported device */
+	return (1);
+}
+#endif /* CONFIG_440 && CONFIG_NET_MULTI */