drivers/net/4xx_enet.c

/*
 * SPDX-License-Identifier:	GPL-2.0	IBM-pibs
 */
/*-----------------------------------------------------------------------------+
 *
 *  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
 *		EMAC0_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 EMAC0_MR1 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
 *  15-Aug-05	sr@denx.de
 *		- merged 405gp_enet.c and 440gx_enet.c to generic 4xx_enet.c
		  now handling all 4xx cpu's.
 *-----------------------------------------------------------------------------*/

#include <config.h>
#include <common.h>
#include <net.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#include <asm/ppc4xx.h>
#include <asm/ppc4xx-emac.h>
#include <asm/ppc4xx-mal.h>
#include <miiphy.h>
#include <malloc.h>
#include <linux/compiler.h>

#if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
#error "CONFIG_MII has to be defined!"
#endif

#define EMAC_RESET_TIMEOUT 1000 /* 1000 ms reset timeout */
#define PHY_AUTONEGOTIATE_TIMEOUT 5000	/* 5000 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

/*-----------------------------------------------------------------------------+
 * Defines for MAL/EMAC interrupt conditions as reported in the UIC (Universal
 * Interrupt Controller).
 *-----------------------------------------------------------------------------*/
#define ETH_IRQ_NUM(dev)	(VECNUM_ETH0 + ((dev) * VECNUM_ETH1_OFFS))

#if defined(CONFIG_HAS_ETH3)
#if !defined(CONFIG_440GX)
#define UIC_ETHx	(UIC_MASK(ETH_IRQ_NUM(0)) || UIC_MASK(ETH_IRQ_NUM(1)) || \
			 UIC_MASK(ETH_IRQ_NUM(2)) || UIC_MASK(ETH_IRQ_NUM(3)))
#else
/* Unfortunately 440GX spreads EMAC interrupts on multiple UIC's */
#define UIC_ETHx	(UIC_MASK(ETH_IRQ_NUM(0)) || UIC_MASK(ETH_IRQ_NUM(1)))
#define UIC_ETHxB	(UIC_MASK(ETH_IRQ_NUM(2)) || UIC_MASK(ETH_IRQ_NUM(3)))
#endif /* !defined(CONFIG_440GX) */
#elif defined(CONFIG_HAS_ETH2)
#define UIC_ETHx	(UIC_MASK(ETH_IRQ_NUM(0)) || UIC_MASK(ETH_IRQ_NUM(1)) || \
			 UIC_MASK(ETH_IRQ_NUM(2)))
#elif defined(CONFIG_HAS_ETH1)
#define UIC_ETHx	(UIC_MASK(ETH_IRQ_NUM(0)) || UIC_MASK(ETH_IRQ_NUM(1)))
#else
#define UIC_ETHx	UIC_MASK(ETH_IRQ_NUM(0))
#endif

/*
 * Define a default version for UIC_ETHxB for non 440GX so that we can
 * use common code for all 4xx variants
 */
#if !defined(UIC_ETHxB)
#define UIC_ETHxB	0
#endif

#define UIC_MAL_SERR	UIC_MASK(VECNUM_MAL_SERR)
#define UIC_MAL_TXDE	UIC_MASK(VECNUM_MAL_TXDE)
#define UIC_MAL_RXDE	UIC_MASK(VECNUM_MAL_RXDE)
#define UIC_MAL_TXEOB	UIC_MASK(VECNUM_MAL_TXEOB)
#define UIC_MAL_RXEOB	UIC_MASK(VECNUM_MAL_RXEOB)

#define MAL_UIC_ERR	(UIC_MAL_SERR | UIC_MAL_TXDE | UIC_MAL_RXDE)
#define MAL_UIC_DEF	(UIC_MAL_RXEOB | MAL_UIC_ERR)

/*
 * We have 3 different interrupt types:
 * - MAL interrupts indicating successful transfer
 * - MAL error interrupts indicating MAL related errors
 * - EMAC interrupts indicating EMAC related errors
 *
 * All those interrupts can be on different UIC's, but since
 * now at least all interrupts from one type are on the same
 * UIC. Only exception is 440GX where the EMAC interrupts are
 * spread over two UIC's!
 */
#if defined(CONFIG_440GX)
#define UIC_BASE_MAL	UIC1_DCR_BASE
#define UIC_BASE_MAL_ERR UIC2_DCR_BASE
#define UIC_BASE_EMAC	UIC2_DCR_BASE
#define UIC_BASE_EMAC_B	UIC3_DCR_BASE
#else
#define UIC_BASE_MAL	(UIC0_DCR_BASE + (UIC_NR(VECNUM_MAL_TXEOB) * 0x10))
#define UIC_BASE_MAL_ERR (UIC0_DCR_BASE + (UIC_NR(VECNUM_MAL_SERR) * 0x10))
#define UIC_BASE_EMAC	(UIC0_DCR_BASE + (UIC_NR(ETH_IRQ_NUM(0)) * 0x10))
#define UIC_BASE_EMAC_B	(UIC0_DCR_BASE + (UIC_NR(ETH_IRQ_NUM(0)) * 0x10))
#endif

#undef INFO_4XX_ENET

#define BI_PHYMODE_NONE	 0
#define BI_PHYMODE_ZMII	 1
#define BI_PHYMODE_RGMII 2
#define BI_PHYMODE_GMII  3
#define BI_PHYMODE_RTBI  4
#define BI_PHYMODE_TBI   5
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
#define BI_PHYMODE_SMII  6
#define BI_PHYMODE_MII   7
#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define BI_PHYMODE_RMII  8
#endif
#endif
#define BI_PHYMODE_SGMII 9

#if defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
#define SDR0_MFR_ETH_CLK_SEL_V(n)	((0x01<<27) / (n+1))
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define SDR0_ETH_CFG_CLK_SEL_V(n)	(0x01 << (8 + n))
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
#define MAL_RX_CHAN_MUL	8	/* 460EX/GT uses MAL channel 8 for EMAC1 */
#else
#define MAL_RX_CHAN_MUL	1
#endif

/*--------------------------------------------------------------------+
 * Fixed PHY (PHY-less) support for Ethernet Ports.
 *--------------------------------------------------------------------*/

/*
 * Some boards do not have a PHY for each ethernet port. These ports
 * are known as Fixed PHY (or PHY-less) ports. For such ports, set
 * the appropriate CONFIG_PHY_ADDR equal to CONFIG_FIXED_PHY and
 * then define CONFIG_SYS_FIXED_PHY_PORTS to define what the speed and
 * duplex should be for these ports in the board configuration
 * file.
 *
 * For Example:
 *     #define CONFIG_FIXED_PHY   0xFFFFFFFF
 *
 *     #define CONFIG_PHY_ADDR    CONFIG_FIXED_PHY
 *     #define CONFIG_PHY1_ADDR   1
 *     #define CONFIG_PHY2_ADDR   CONFIG_FIXED_PHY
 *     #define CONFIG_PHY3_ADDR   3
 *
 *     #define CONFIG_SYS_FIXED_PHY_PORT(devnum,speed,duplex) \
 *                     {devnum, speed, duplex},
 *
 *     #define CONFIG_SYS_FIXED_PHY_PORTS \
 *                     CONFIG_SYS_FIXED_PHY_PORT(0,1000,FULL) \
 *                     CONFIG_SYS_FIXED_PHY_PORT(2,100,HALF)
 */

#ifndef CONFIG_FIXED_PHY
#define CONFIG_FIXED_PHY	0xFFFFFFFF /* Fixed PHY (PHY-less) */
#endif

#ifndef CONFIG_SYS_FIXED_PHY_PORTS
#define CONFIG_SYS_FIXED_PHY_PORTS	/* default is an empty array */
#endif

struct fixed_phy_port {
	unsigned int devnum;	/* ethernet port */
	unsigned int speed;	/* specified speed 10,100 or 1000 */
	unsigned int duplex;	/* specified duplex FULL or HALF */
};

static const struct fixed_phy_port fixed_phy_port[] = {
	CONFIG_SYS_FIXED_PHY_PORTS	/* defined in board configuration file */
};

/*-----------------------------------------------------------------------------+
 * Global variables. TX and RX descriptors and buffers.
 *-----------------------------------------------------------------------------*/

/*
 * Get count of EMAC devices (doesn't have to be the max. possible number
 * supported by the cpu)
 *
 * CONFIG_BOARD_EMAC_COUNT added so now a "dynamic" way to configure the
 * EMAC count is possible. As it is needed for the Kilauea/Haleakala
 * 405EX/405EXr eval board, using the same binary.
 */
#if defined(CONFIG_BOARD_EMAC_COUNT)
#define LAST_EMAC_NUM	board_emac_count()
#else /* CONFIG_BOARD_EMAC_COUNT */
#if defined(CONFIG_HAS_ETH3)
#define LAST_EMAC_NUM	4
#elif defined(CONFIG_HAS_ETH2)
#define LAST_EMAC_NUM	3
#elif defined(CONFIG_HAS_ETH1)
#define LAST_EMAC_NUM	2
#else
#define LAST_EMAC_NUM	1
#endif
#endif /* CONFIG_BOARD_EMAC_COUNT */

/* normal boards start with EMAC0 */
#if !defined(CONFIG_EMAC_NR_START)
#define CONFIG_EMAC_NR_START	0
#endif

#define MAL_RX_DESC_SIZE	2048
#define MAL_TX_DESC_SIZE	2048
#define MAL_ALLOC_SIZE		(MAL_TX_DESC_SIZE + MAL_RX_DESC_SIZE)

/*-----------------------------------------------------------------------------+
 * 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);

extern int phy_setup_aneg (char *devname, unsigned char addr);
int emac4xx_miiphy_read(struct mii_dev *bus, int addr, int devad, int reg);
int emac4xx_miiphy_write(struct mii_dev *bus, int addr, int devad, int reg,
			 u16 value);

int board_emac_count(void);

static void emac_loopback_enable(EMAC_4XX_HW_PST hw_p)
{
#if defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
	u32 val;

	mfsdr(SDR0_MFR, val);
	val |= SDR0_MFR_ETH_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_MFR, val);
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
	u32 val;

	mfsdr(SDR0_ETH_CFG, val);
	val |= SDR0_ETH_CFG_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_ETH_CFG, val);
#endif
}

static void emac_loopback_disable(EMAC_4XX_HW_PST hw_p)
{
#if defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
	u32 val;

	mfsdr(SDR0_MFR, val);
	val &= ~SDR0_MFR_ETH_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_MFR, val);
#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
	u32 val;

	mfsdr(SDR0_ETH_CFG, val);
	val &= ~SDR0_ETH_CFG_CLK_SEL_V(hw_p->devnum);
	mtsdr(SDR0_ETH_CFG, val);
#endif
}

/*-----------------------------------------------------------------------------+
| ppc_4xx_eth_halt
| Disable MAL channel, and EMACn
+-----------------------------------------------------------------------------*/
static void ppc_4xx_eth_halt (struct eth_device *dev)
{
	EMAC_4XX_HW_PST hw_p = dev->priv;
	u32 val = 10000;

	out_be32((void *)EMAC0_IER + hw_p->hw_addr, 0x00000000);	/* disable emac interrupts */

	/* 1st reset MAL channel */
	/* Note: writing a 0 to a channel has no effect */
#if defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mtdcr (MAL0_TXCARR, (MAL_CR_MMSR >> (hw_p->devnum * 2)));
#else
	mtdcr (MAL0_TXCARR, (MAL_CR_MMSR >> hw_p->devnum));
#endif
	mtdcr (MAL0_RXCARR, (MAL_CR_MMSR >> hw_p->devnum));

	/* wait for reset */
	while (mfdcr (MAL0_RXCASR) & (MAL_CR_MMSR >> hw_p->devnum)) {
		udelay (1000);	/* Delay 1 MS so as not to hammer the register */
		val--;
		if (val == 0)
			break;
	}

	/* provide clocks for EMAC internal loopback  */
	emac_loopback_enable(hw_p);

	/* EMAC RESET */
	out_be32((void *)EMAC0_MR0 + hw_p->hw_addr, EMAC_MR0_SRST);

	/* remove clocks for EMAC internal loopback  */
	emac_loopback_disable(hw_p);

#ifndef CONFIG_NETCONSOLE
	hw_p->print_speed = 1;	/* print speed message again next time */
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
	/* don't bypass the TAHOE0/TAHOE1 cores for Linux */
	mfsdr(SDR0_ETH_CFG, val);
	val &= ~(SDR0_ETH_CFG_TAHOE0_BYPASS | SDR0_ETH_CFG_TAHOE1_BYPASS);
	mtsdr(SDR0_ETH_CFG, val);
#endif

	return;
}

#if defined (CONFIG_440GX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	unsigned long pfc1;
	unsigned long zmiifer;
	unsigned long rmiifer;

	mfsdr(SDR0_PFC1, pfc1);
	pfc1 = SDR0_PFC1_EPS_DECODE(pfc1);

	zmiifer = 0;
	rmiifer = 0;

	switch (pfc1) {
	case 1:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 2:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	case 3:
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 4:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V (3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 5:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 6:
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V (1);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		break;
	case 0:
	default:
		zmiifer = ZMII_FER_MII << ZMII_FER_V(devnum);
		rmiifer = 0x0;
		bis->bi_phymode[0] = BI_PHYMODE_ZMII;
		bis->bi_phymode[1] = BI_PHYMODE_ZMII;
		bis->bi_phymode[2] = BI_PHYMODE_ZMII;
		bis->bi_phymode[3] = BI_PHYMODE_ZMII;
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	zmiifer |= (ZMII_FER_MDI) << ZMII_FER_V(devnum);

	out_be32((void *)ZMII0_FER, zmiifer);
	out_be32((void *)RGMII_FER, rmiifer);

	return ((int)pfc1);
}
#endif	/* CONFIG_440_GX */

#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	unsigned long zmiifer=0x0;
	unsigned long pfc1;

	mfsdr(SDR0_PFC1, pfc1);
	pfc1 &= SDR0_PFC1_SELECT_MASK;

	switch (pfc1) {
	case SDR0_PFC1_SELECT_CONFIG_2:
		/* 1 x GMII port */
		out_be32((void *)ZMII0_FER, 0x00);
		out_be32((void *)RGMII_FER, 0x00000037);
		bis->bi_phymode[0] = BI_PHYMODE_GMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case SDR0_PFC1_SELECT_CONFIG_4:
		/* 2 x RGMII ports */
		out_be32((void *)ZMII0_FER, 0x00);
		out_be32((void *)RGMII_FER, 0x00000055);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		break;
	case SDR0_PFC1_SELECT_CONFIG_6:
		/* 2 x SMII ports */
		out_be32((void *)ZMII0_FER,
			 ((ZMII_FER_SMII) << ZMII_FER_V(0)) |
			 ((ZMII_FER_SMII) << ZMII_FER_V(1)));
		out_be32((void *)RGMII_FER, 0x00000000);
		bis->bi_phymode[0] = BI_PHYMODE_SMII;
		bis->bi_phymode[1] = BI_PHYMODE_SMII;
		break;
	case SDR0_PFC1_SELECT_CONFIG_1_2:
		/* only 1 x MII supported */
		out_be32((void *)ZMII0_FER, (ZMII_FER_MII) << ZMII_FER_V(0));
		out_be32((void *)RGMII_FER, 0x00000000);
		bis->bi_phymode[0] = BI_PHYMODE_MII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	default:
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	zmiifer = in_be32((void *)ZMII0_FER);
	zmiifer |= (ZMII_FER_MDI) << ZMII_FER_V(devnum);
	out_be32((void *)ZMII0_FER, zmiifer);

	return ((int)0x0);
}
#endif	/* CONFIG_440EPX */

#if defined(CONFIG_405EX)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	u32 rgmiifer = 0;

	/*
	 * The 405EX(r)'s RGMII bridge can operate in one of several
	 * modes, only one of which (2 x RGMII) allows the
	 * simultaneous use of both EMACs on the 405EX.
	 */

	switch (CONFIG_EMAC_PHY_MODE) {

	case EMAC_PHY_MODE_NONE:
		/* No ports */
		rgmiifer |= RGMII_FER_DIS	<< 0;
		rgmiifer |= RGMII_FER_DIS	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_NONE;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case EMAC_PHY_MODE_NONE_RGMII:
		/* 1 x RGMII port on channel 0 */
		rgmiifer |= RGMII_FER_RGMII	<< 0;
		rgmiifer |= RGMII_FER_DIS	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case EMAC_PHY_MODE_RGMII_NONE:
		/* 1 x RGMII port on channel 1 */
		rgmiifer |= RGMII_FER_DIS	<< 0;
		rgmiifer |= RGMII_FER_RGMII	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_NONE;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		break;
	case EMAC_PHY_MODE_RGMII_RGMII:
		/* 2 x RGMII ports */
		rgmiifer |= RGMII_FER_RGMII	<< 0;
		rgmiifer |= RGMII_FER_RGMII	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		break;
	case EMAC_PHY_MODE_NONE_GMII:
		/* 1 x GMII port on channel 0 */
		rgmiifer |= RGMII_FER_GMII	<< 0;
		rgmiifer |= RGMII_FER_DIS	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_GMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case EMAC_PHY_MODE_NONE_MII:
		/* 1 x MII port on channel 0 */
		rgmiifer |= RGMII_FER_MII	<< 0;
		rgmiifer |= RGMII_FER_DIS	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_MII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		break;
	case EMAC_PHY_MODE_GMII_NONE:
		/* 1 x GMII port on channel 1 */
		rgmiifer |= RGMII_FER_DIS	<< 0;
		rgmiifer |= RGMII_FER_GMII	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_NONE;
		bis->bi_phymode[1] = BI_PHYMODE_GMII;
		break;
	case EMAC_PHY_MODE_MII_NONE:
		/* 1 x MII port on channel 1 */
		rgmiifer |= RGMII_FER_DIS	<< 0;
		rgmiifer |= RGMII_FER_MII	<< 4;
		out_be32((void *)RGMII_FER, rgmiifer);
		bis->bi_phymode[0] = BI_PHYMODE_NONE;
		bis->bi_phymode[1] = BI_PHYMODE_MII;
		break;
	default:
		break;
	}

	/* Ensure we setup mdio for this devnum and ONLY this devnum */
	rgmiifer = in_be32((void *)RGMII_FER);
	rgmiifer |= (1 << (19-devnum));
	out_be32((void *)RGMII_FER, rgmiifer);

	return ((int)0x0);
}
#endif  /* CONFIG_405EX */

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
int ppc_4xx_eth_setup_bridge(int devnum, bd_t * bis)
{
	u32 eth_cfg;
	u32 zmiifer;		/* ZMII0_FER reg. */
	u32 rmiifer;		/* RGMII0_FER reg. Bridge 0 */
	u32 rmiifer1;		/* RGMII0_FER reg. Bridge 1 */
	int mode;

	zmiifer  = 0;
	rmiifer  = 0;
	rmiifer1 = 0;

#if defined(CONFIG_460EX)
	mode = 9;
	mfsdr(SDR0_ETH_CFG, eth_cfg);
	if (((eth_cfg & SDR0_ETH_CFG_SGMII0_ENABLE) > 0) &&
	    ((eth_cfg & SDR0_ETH_CFG_SGMII1_ENABLE) > 0))
		mode = 11; /* config SGMII */
#else
	mode = 10;
	mfsdr(SDR0_ETH_CFG, eth_cfg);
	if (((eth_cfg & SDR0_ETH_CFG_SGMII0_ENABLE) > 0) &&
	    ((eth_cfg & SDR0_ETH_CFG_SGMII1_ENABLE) > 0) &&
	    ((eth_cfg & SDR0_ETH_CFG_SGMII2_ENABLE) > 0))
		mode = 12; /* config SGMII */
#endif

	/* TODO:
	 * NOTE: 460GT has 2 RGMII bridge cores:
	 *		emac0 ------ RGMII0_BASE
	 *		           |
	 *		emac1 -----+
	 *
	 *		emac2 ------ RGMII1_BASE
	 *		           |
	 *		emac3 -----+
	 *
	 *	460EX has 1 RGMII bridge core:
	 *	and RGMII1_BASE is disabled
	 *		emac0 ------ RGMII0_BASE
	 *		           |
	 *		emac1 -----+
	 */

	/*
	 * Right now only 2*RGMII is supported. Please extend when needed.
	 * sr - 2008-02-19
	 * Add SGMII support.
	 * vg - 2008-07-28
	 */
	switch (mode) {
	case 1:
		/* 1 MII - 460EX */
		/* GMC0 EMAC4_0, ZMII Bridge */
		zmiifer |= ZMII_FER_MII << ZMII_FER_V(0);
		bis->bi_phymode[0] = BI_PHYMODE_MII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_NONE;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 2:
		/* 2 MII - 460GT */
		/* GMC0 EMAC4_0, GMC1 EMAC4_2, ZMII Bridge */
		zmiifer |= ZMII_FER_MII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_MII << ZMII_FER_V(2);
		bis->bi_phymode[0] = BI_PHYMODE_MII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_MII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 3:
		/* 2 RMII - 460EX */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, ZMII Bridge */
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(1);
		bis->bi_phymode[0] = BI_PHYMODE_RMII;
		bis->bi_phymode[1] = BI_PHYMODE_RMII;
		bis->bi_phymode[2] = BI_PHYMODE_NONE;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 4:
		/* 4 RMII - 460GT */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, GMC1 EMAC4_2, GMC1, EMAC4_3 */
		/* ZMII Bridge */
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_RMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_RMII;
		bis->bi_phymode[1] = BI_PHYMODE_RMII;
		bis->bi_phymode[2] = BI_PHYMODE_RMII;
		bis->bi_phymode[3] = BI_PHYMODE_RMII;
		break;
	case 5:
		/* 2 SMII - 460EX */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, ZMII Bridge */
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		bis->bi_phymode[0] = BI_PHYMODE_SMII;
		bis->bi_phymode[1] = BI_PHYMODE_SMII;
		bis->bi_phymode[2] = BI_PHYMODE_NONE;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 6:
		/* 4 SMII - 460GT */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, GMC0 EMAC4_3, GMC0 EMAC4_3 */
		/* ZMII Bridge */
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(0);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(1);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(2);
		zmiifer |= ZMII_FER_SMII << ZMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_SMII;
		bis->bi_phymode[1] = BI_PHYMODE_SMII;
		bis->bi_phymode[2] = BI_PHYMODE_SMII;
		bis->bi_phymode[3] = BI_PHYMODE_SMII;
		break;
	case 7:
		/* This is the default mode that we want for board bringup - Maple */
		/* 1 GMII - 460EX */
		/* GMC0 EMAC4_0, RGMII Bridge 0 */
		rmiifer |= RGMII_FER_MDIO(0);

		if (devnum == 0) {
			rmiifer |= RGMII_FER_GMII << RGMII_FER_V(2); /* CH0CFG - EMAC0 */
			bis->bi_phymode[0] = BI_PHYMODE_GMII;
			bis->bi_phymode[1] = BI_PHYMODE_NONE;
			bis->bi_phymode[2] = BI_PHYMODE_NONE;
			bis->bi_phymode[3] = BI_PHYMODE_NONE;
		} else {
			rmiifer |= RGMII_FER_GMII << RGMII_FER_V(3); /* CH1CFG - EMAC1 */
			bis->bi_phymode[0] = BI_PHYMODE_NONE;
			bis->bi_phymode[1] = BI_PHYMODE_GMII;
			bis->bi_phymode[2] = BI_PHYMODE_NONE;
			bis->bi_phymode[3] = BI_PHYMODE_NONE;
		}
		break;
	case 8:
		/* 2 GMII - 460GT */
		/* GMC0 EMAC4_0, RGMII Bridge 0 */
		/* GMC1 EMAC4_2, RGMII Bridge 1 */
		rmiifer |= RGMII_FER_GMII << RGMII_FER_V(2);	/* CH0CFG - EMAC0 */
		rmiifer1 |= RGMII_FER_GMII << RGMII_FER_V(2);	/* CH0CFG - EMAC2 */
		rmiifer |= RGMII_FER_MDIO(0);			/* enable MDIO - EMAC0 */
		rmiifer1 |= RGMII_FER_MDIO(0);			/* enable MDIO - EMAC2 */

		bis->bi_phymode[0] = BI_PHYMODE_GMII;
		bis->bi_phymode[1] = BI_PHYMODE_NONE;
		bis->bi_phymode[2] = BI_PHYMODE_GMII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 9:
		/* 2 RGMII - 460EX */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, RGMII Bridge 0 */
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(3);
		rmiifer |= RGMII_FER_MDIO(0);			/* enable MDIO - EMAC0 */

		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		bis->bi_phymode[2] = BI_PHYMODE_NONE;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 10:
		/* 4 RGMII - 460GT */
		/* GMC0 EMAC4_0, GMC0 EMAC4_1, RGMII Bridge 0 */
		/* GMC1 EMAC4_2, GMC1 EMAC4_3, RGMII Bridge 1 */
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(2);
		rmiifer |= RGMII_FER_RGMII << RGMII_FER_V(3);
		rmiifer1 |= RGMII_FER_RGMII << RGMII_FER_V(2);
		rmiifer1 |= RGMII_FER_RGMII << RGMII_FER_V(3);
		bis->bi_phymode[0] = BI_PHYMODE_RGMII;
		bis->bi_phymode[1] = BI_PHYMODE_RGMII;
		bis->bi_phymode[2] = BI_PHYMODE_RGMII;
		bis->bi_phymode[3] = BI_PHYMODE_RGMII;
		break;
	case 11:
		/* 2 SGMII - 460EX */
		bis->bi_phymode[0] = BI_PHYMODE_SGMII;
		bis->bi_phymode[1] = BI_PHYMODE_SGMII;
		bis->bi_phymode[2] = BI_PHYMODE_NONE;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	case 12:
		/* 3 SGMII - 460GT */
		bis->bi_phymode[0] = BI_PHYMODE_SGMII;
		bis->bi_phymode[1] = BI_PHYMODE_SGMII;
		bis->bi_phymode[2] = BI_PHYMODE_SGMII;
		bis->bi_phymode[3] = BI_PHYMODE_NONE;
		break;
	default:
		break;
	}

	/* Set EMAC for MDIO */
	mfsdr(SDR0_ETH_CFG, eth_cfg);
	eth_cfg |= SDR0_ETH_CFG_MDIO_SEL_EMAC0;
	mtsdr(SDR0_ETH_CFG, eth_cfg);

	out_be32((void *)RGMII_FER, rmiifer);
#if defined(CONFIG_460GT)
	out_be32((void *)RGMII_FER + RGMII1_BASE_OFFSET, rmiifer1);
#endif

	/* bypass the TAHOE0/TAHOE1 cores for U-Boot */
	mfsdr(SDR0_ETH_CFG, eth_cfg);
	eth_cfg |= (SDR0_ETH_CFG_TAHOE0_BYPASS | SDR0_ETH_CFG_TAHOE1_BYPASS);
	mtsdr(SDR0_ETH_CFG, eth_cfg);

	return 0;
}
#endif /* CONFIG_460EX || CONFIG_460GT */

static inline void *malloc_aligned(u32 size, u32 align)
{
	return (void *)(((u32)malloc(size + align) + align - 1) &
			~(align - 1));
}

static int ppc_4xx_eth_init (struct eth_device *dev, bd_t * bis)
{
	int i;
	unsigned long reg = 0;
	unsigned long msr;
	unsigned long speed;
	unsigned long duplex;
	unsigned long failsafe;
	unsigned mode_reg;
	unsigned short devnum;
	unsigned short reg_short;
#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	u32 opbfreq;
	sys_info_t sysinfo;
#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	__maybe_unused int ethgroup = -1;
#endif
#endif
	u32 bd_cached;
	u32 bd_uncached = 0;
#ifdef CONFIG_4xx_DCACHE
	static u32 last_used_ea = 0;
#endif
#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	int rgmii_channel;
#endif

	EMAC_4XX_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) {
		printf("ERROR: ethaddr not set!\n");
		return -1;
	}

#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	/* Need to get the OPB frequency so we can access the PHY */
	get_sys_info (&sysinfo);
#endif

	msr = mfmsr ();
	mtmsr (msr & ~(MSR_EE));	/* disable interrupts */

	devnum = hw_p->devnum;

#ifdef INFO_4XX_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 preceding 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;
	hw_p->print_speed = 1;	/* print speed message again next time */
#endif

	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 */

#if defined(CONFIG_440) && !defined(CONFIG_440SP) && !defined(CONFIG_440SPE)
	/* 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;
	out_be32((void *)ZMII0_FER, 0);
	udelay (100);

#if defined(CONFIG_440GP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	out_be32((void *)ZMII0_FER, (ZMII_FER_RMII | ZMII_FER_MDI) << ZMII_FER_V (devnum));
#elif defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT)
	ethgroup = ppc_4xx_eth_setup_bridge(devnum, bis);
#endif

	out_be32((void *)ZMII0_SSR, ZMII0_SSR_SP << ZMII0_SSR_V(devnum));
#endif /* defined(CONFIG_440) && !defined(CONFIG_440SP) */
#if defined(CONFIG_405EX)
	ethgroup = ppc_4xx_eth_setup_bridge(devnum, bis);
#endif

	sync();

	/* provide clocks for EMAC internal loopback  */
	emac_loopback_enable(hw_p);

	/* EMAC RESET */
	out_be32((void *)EMAC0_MR0 + hw_p->hw_addr, EMAC_MR0_SRST);

	/* remove clocks for EMAC internal loopback  */
	emac_loopback_disable(hw_p);

	failsafe = 1000;
	while ((in_be32((void *)EMAC0_MR0 + hw_p->hw_addr) & (EMAC_MR0_SRST)) && failsafe) {
		udelay (1000);
		failsafe--;
	}
	if (failsafe <= 0)
		printf("\nProblem resetting EMAC!\n");

#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	/* Whack the M1 register */
	mode_reg = 0x0;
	mode_reg &= ~0x00000038;
	opbfreq = sysinfo.freqOPB / 1000000;
	if (opbfreq <= 50);
	else if (opbfreq <= 66)
		mode_reg |= EMAC_MR1_OBCI_66;
	else if (opbfreq <= 83)
		mode_reg |= EMAC_MR1_OBCI_83;
	else if (opbfreq <= 100)
		mode_reg |= EMAC_MR1_OBCI_100;
	else
		mode_reg |= EMAC_MR1_OBCI_GT100;

	out_be32((void *)EMAC0_MR1 + hw_p->hw_addr, mode_reg);
#endif /* defined(CONFIG_440GX) || defined(CONFIG_440SP) */

#if defined(CONFIG_GPCS_PHY_ADDR) || defined(CONFIG_GPCS_PHY1_ADDR) || \
    defined(CONFIG_GPCS_PHY2_ADDR) || defined(CONFIG_GPCS_PHY3_ADDR)
	if (bis->bi_phymode[devnum] == BI_PHYMODE_SGMII) {
		/*
		 * In SGMII mode, GPCS access is needed for
		 * communication with the internal SGMII SerDes.
		 */
		switch (devnum) {
#if defined(CONFIG_GPCS_PHY_ADDR)
		case 0:
			reg = CONFIG_GPCS_PHY_ADDR;
			break;
#endif
#if defined(CONFIG_GPCS_PHY1_ADDR)
		case 1:
			reg = CONFIG_GPCS_PHY1_ADDR;
			break;
#endif
#if defined(CONFIG_GPCS_PHY2_ADDR)
		case 2:
			reg = CONFIG_GPCS_PHY2_ADDR;
			break;
#endif
#if defined(CONFIG_GPCS_PHY3_ADDR)
		case 3:
			reg = CONFIG_GPCS_PHY3_ADDR;
			break;
#endif
		}

		mode_reg = in_be32((void *)EMAC0_MR1 + hw_p->hw_addr);
		mode_reg |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_IPPA_SET(reg);
		out_be32((void *)EMAC0_MR1 + hw_p->hw_addr, mode_reg);

		/* Configure GPCS interface to recommended setting for SGMII */
		miiphy_reset(dev->name, reg);
		miiphy_write(dev->name, reg, 0x04, 0x8120); /* AsymPause, FDX */
		miiphy_write(dev->name, reg, 0x07, 0x2801); /* msg_pg, toggle */
		miiphy_write(dev->name, reg, 0x00, 0x0140); /* 1Gbps, FDX     */
	}
#endif /* defined(CONFIG_GPCS_PHY_ADDR) */

	/* wait for PHY to complete auto negotiation */
	reg_short = 0;
	switch (devnum) {
	case 0:
		reg = CONFIG_PHY_ADDR;
		break;
#if defined (CONFIG_PHY1_ADDR)
	case 1:
		reg = CONFIG_PHY1_ADDR;
		break;
#endif
#if defined (CONFIG_PHY2_ADDR)
	case 2:
		reg = CONFIG_PHY2_ADDR;
		break;
#endif
#if defined (CONFIG_PHY3_ADDR)
	case 3:
		reg = CONFIG_PHY3_ADDR;
		break;
#endif
	default:
		reg = CONFIG_PHY_ADDR;
		break;
	}

	bis->bi_phynum[devnum] = reg;

	if (reg == CONFIG_FIXED_PHY)
		goto get_speed;

#if defined(CONFIG_PHY_RESET)
	/*
	 * Reset the phy, only if its the first time through
	 * otherwise, just check the speeds & feeds
	 */
	if (hw_p->first_init == 0) {
#if defined(CONFIG_M88E1111_PHY)
		miiphy_write (dev->name, reg, 0x14, 0x0ce3);
		miiphy_write (dev->name, reg, 0x18, 0x4101);
		miiphy_write (dev->name, reg, 0x09, 0x0e00);
		miiphy_write (dev->name, reg, 0x04, 0x01e1);
#if defined(CONFIG_M88E1111_DISABLE_FIBER)
		miiphy_read(dev->name, reg, 0x1b, &reg_short);
		reg_short |= 0x8000;
		miiphy_write(dev->name, reg, 0x1b, reg_short);
#endif
#endif
#if defined(CONFIG_M88E1112_PHY)
		if (bis->bi_phymode[devnum] == BI_PHYMODE_SGMII) {
			/*
			 * Marvell 88E1112 PHY needs to have the SGMII MAC
			 * interace (page 2) properly configured to
			 * communicate with the 460EX/GT GPCS interface.
			 */

			/* Set access to Page 2 */
			miiphy_write(dev->name, reg, 0x16, 0x0002);

			miiphy_write(dev->name, reg, 0x00, 0x0040); /* 1Gbps */
			miiphy_read(dev->name, reg, 0x1a, &reg_short);
			reg_short |= 0x8000; /* bypass Auto-Negotiation */
			miiphy_write(dev->name, reg, 0x1a, reg_short);
			miiphy_reset(dev->name, reg); /* reset MAC interface */

			/* Reset access to Page 0 */
			miiphy_write(dev->name, reg, 0x16, 0x0000);
		}
#endif /* defined(CONFIG_M88E1112_PHY) */
		miiphy_reset (dev->name, reg);

#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)

#if defined(CONFIG_CIS8201_PHY)
		/*
		 * Cicada 8201 PHY needs to have an extended register whacked
		 * for RGMII mode.
		 */
		if (((devnum == 2) || (devnum == 3)) && (4 == ethgroup)) {
#if defined(CONFIG_CIS8201_SHORT_ETCH)
			miiphy_write (dev->name, reg, 23, 0x1300);
#else
			miiphy_write (dev->name, reg, 23, 0x1000);
#endif
			/*
			 * Vitesse VSC8201/Cicada CIS8201 errata:
			 * Interoperability problem with Intel 82547EI phys
			 * This work around (provided by Vitesse) changes
			 * the default timer convergence from 8ms to 12ms
			 */
			miiphy_write (dev->name, reg, 0x1f, 0x2a30);
			miiphy_write (dev->name, reg, 0x08, 0x0200);
			miiphy_write (dev->name, reg, 0x1f, 0x52b5);
			miiphy_write (dev->name, reg, 0x02, 0x0004);
			miiphy_write (dev->name, reg, 0x01, 0x0671);
			miiphy_write (dev->name, reg, 0x00, 0x8fae);
			miiphy_write (dev->name, reg, 0x1f, 0x2a30);
			miiphy_write (dev->name, reg, 0x08, 0x0000);
			miiphy_write (dev->name, reg, 0x1f, 0x0000);
			/* end Vitesse/Cicada errata */
		}
#endif /* defined(CONFIG_CIS8201_PHY) */

#if defined(CONFIG_ET1011C_PHY)
		/*
		 * Agere ET1011c PHY needs to have an extended register whacked
		 * for RGMII mode.
		 */
		if (((devnum == 2) || (devnum ==3)) && (4 == ethgroup)) {
			miiphy_read (dev->name, reg, 0x16, &reg_short);
			reg_short &= ~(0x7);
			reg_short |= 0x6;	/* RGMII DLL Delay*/
			miiphy_write (dev->name, reg, 0x16, reg_short);

			miiphy_read (dev->name, reg, 0x17, &reg_short);
			reg_short &= ~(0x40);
			miiphy_write (dev->name, reg, 0x17, reg_short);

			miiphy_write(dev->name, reg, 0x1c, 0x74f0);
		}
#endif /* defined(CONFIG_ET1011C_PHY) */

#endif /* defined(CONFIG_440GX) ... */
		/* Start/Restart autonegotiation */
		phy_setup_aneg (dev->name, reg);
		udelay (1000);
	}
#endif /* defined(CONFIG_PHY_RESET) */

	miiphy_read (dev->name, reg, MII_BMSR, &reg_short);

	/*
	 * Wait if PHY is capable of autonegotiation and autonegotiation is not complete
	 */
	if ((reg_short & BMSR_ANEGCAPABLE)
	    && !(reg_short & BMSR_ANEGCOMPLETE)) {
		puts ("Waiting for PHY auto negotiation to complete");
		i = 0;
		while (!(reg_short & BMSR_ANEGCOMPLETE)) {
			/*
			 * Timeout reached ?
			 */
			if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
				puts (" TIMEOUT !\n");
				break;
			}

			if ((i++ % 1000) == 0) {
				putc ('.');
			}
			udelay (1000);	/* 1 ms */
			miiphy_read (dev->name, reg, MII_BMSR, &reg_short);
		}
		puts (" done\n");
		udelay (500000);	/* another 500 ms (results in faster booting) */
	}

get_speed:
	if (reg == CONFIG_FIXED_PHY) {
		for (i = 0; i < ARRAY_SIZE(fixed_phy_port); i++) {
			if (devnum == fixed_phy_port[i].devnum) {
				speed = fixed_phy_port[i].speed;
				duplex = fixed_phy_port[i].duplex;
				break;
			}
		}

		if (i == ARRAY_SIZE(fixed_phy_port)) {
			printf("ERROR: PHY (%s) not configured correctly!\n",
				dev->name);
			return -1;
		}
	} else {
		speed = miiphy_speed(dev->name, reg);
		duplex = miiphy_duplex(dev->name, reg);
	}

	if (hw_p->print_speed) {
		hw_p->print_speed = 0;
		printf ("ENET Speed is %d Mbps - %s duplex connection (EMAC%d)\n",
			(int) speed, (duplex == HALF) ? "HALF" : "FULL",
			hw_p->devnum);
	}

#if defined(CONFIG_440) && \
    !defined(CONFIG_440SP) && !defined(CONFIG_440SPE) && \
    !defined(CONFIG_440EPX) && !defined(CONFIG_440GRX) && \
    !defined(CONFIG_460EX) && !defined(CONFIG_460GT)
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mfsdr(SDR0_MFR, reg);
	if (speed == 100) {
		reg = (reg & ~SDR0_MFR_ZMII_MODE_MASK) | SDR0_MFR_ZMII_MODE_RMII_100M;
	} else {
		reg = (reg & ~SDR0_MFR_ZMII_MODE_MASK) | SDR0_MFR_ZMII_MODE_RMII_10M;
	}
	mtsdr(SDR0_MFR, reg);
#endif

	/* Set ZMII/RGMII speed according to the phy link speed */
	reg = in_be32((void *)ZMII0_SSR);
	if ( (speed == 100) || (speed == 1000) )
		out_be32((void *)ZMII0_SSR, reg | (ZMII0_SSR_SP << ZMII0_SSR_V (devnum)));
	else
		out_be32((void *)ZMII0_SSR, reg & (~(ZMII0_SSR_SP << ZMII0_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 if (speed == 10)
			reg = (RGMII_SSR_SP_10MBPS << RGMII_SSR_V (devnum));
		else {
			printf("Error in RGMII Speed\n");
			return -1;
		}
		out_be32((void *)RGMII_SSR, reg);
	}
#endif /* defined(CONFIG_440) && !defined(CONFIG_440SP) */

#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	if (devnum >= 2)
		rgmii_channel = devnum - 2;
	else
		rgmii_channel = devnum;

	if (speed == 1000)
		reg = (RGMII_SSR_SP_1000MBPS << RGMII_SSR_V(rgmii_channel));
	else if (speed == 100)
		reg = (RGMII_SSR_SP_100MBPS << RGMII_SSR_V(rgmii_channel));
	else if (speed == 10)
		reg = (RGMII_SSR_SP_10MBPS << RGMII_SSR_V(rgmii_channel));
	else {
		printf("Error in RGMII Speed\n");
		return -1;
	}
	out_be32((void *)RGMII_SSR, reg);
#if defined(CONFIG_460GT)
	if ((devnum == 2) || (devnum == 3))
		out_be32((void *)RGMII_SSR + RGMII1_BASE_OFFSET, reg);
#endif
#endif

	/* set the Mal configuration reg */
#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
	mtdcr (MAL0_CFG, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA |
	       MAL_CR_PLBLT_DEFAULT | MAL_CR_EOPIE | 0x00330000);
#else
	mtdcr (MAL0_CFG, MAL_CR_PLBB | MAL_CR_OPBBL | MAL_CR_LEA | MAL_CR_PLBLT_DEFAULT);
	/* Errata 1.12: MAL_1 -- Disable MAL bursting */
	if (get_pvr() == PVR_440GP_RB) {
		mtdcr (MAL0_CFG, mfdcr(MAL0_CFG) & ~MAL_CR_PLBB);
	}
#endif

	/*
	 * 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.
	 */
	if (hw_p->first_init == 0) {
		debug("*** Allocating descriptor memory ***\n");

		bd_cached = (u32)malloc_aligned(MAL_ALLOC_SIZE, 4096);
		if (!bd_cached) {
			printf("%s: Error allocating MAL descriptor buffers!\n", __func__);
			return -1;
		}

#ifdef CONFIG_4xx_DCACHE
		flush_dcache_range(bd_cached, bd_cached + MAL_ALLOC_SIZE);
		if (!last_used_ea)
#if defined(CONFIG_SYS_MEM_TOP_HIDE)
			bd_uncached = bis->bi_memsize + CONFIG_SYS_MEM_TOP_HIDE;
#else
			bd_uncached = bis->bi_memsize;
#endif
		else
			bd_uncached = last_used_ea + MAL_ALLOC_SIZE;

		last_used_ea = bd_uncached;
		program_tlb(bd_cached, bd_uncached, MAL_ALLOC_SIZE,
			    TLB_WORD2_I_ENABLE);
#else
		bd_uncached = bd_cached;
#endif
		hw_p->tx_phys = bd_cached;
		hw_p->rx_phys = bd_cached + MAL_TX_DESC_SIZE;
		hw_p->tx = (mal_desc_t *)(bd_uncached);
		hw_p->rx = (mal_desc_t *)(bd_uncached + MAL_TX_DESC_SIZE);
		debug("hw_p->tx=%p, hw_p->rx=%p\n", hw_p->tx, hw_p->rx);
	}

	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 = malloc_aligned(MAL_ALLOC_SIZE,
							 L1_CACHE_BYTES);
		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;
		debug("TX_BUFF %d @ 0x%08x\n", i, (u32)hw_p->tx[i].data_ptr);
	}

	for (i = 0; i < NUM_RX_BUFF; i++) {
		hw_p->rx[i].ctrl = 0;
		hw_p->rx[i].data_len = 0;
		hw_p->rx[i].data_ptr = (char *)net_rx_packets[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;
		debug("RX_BUFF %d @ 0x%08x\n", i, (u32)hw_p->rx[i].data_ptr);
	}

	reg = 0x00000000;

	reg |= dev->enetaddr[0];	/* set high address */
	reg = reg << 8;
	reg |= dev->enetaddr[1];

	out_be32((void *)EMAC0_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];

	out_be32((void *)EMAC0_IAL + hw_p->hw_addr, reg);

	switch (devnum) {
	case 1:
		/* setup MAL tx & rx channel pointers */
#if defined (CONFIG_405EP) || defined (CONFIG_440EP) || defined (CONFIG_440GR)
		mtdcr (MAL0_TXCTP2R, hw_p->tx_phys);
#else
		mtdcr (MAL0_TXCTP1R, hw_p->tx_phys);
#endif
#if defined(CONFIG_440)
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_RXBADDR, 0x0);
#endif

#if defined(CONFIG_460EX) || defined(CONFIG_460GT)
		mtdcr (MAL0_RXCTP8R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS8, ENET_MAX_MTU_ALIGNED / 16);
#else
		mtdcr (MAL0_RXCTP1R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS1, ENET_MAX_MTU_ALIGNED / 16);
#endif
		break;
#if defined (CONFIG_440GX)
	case 2:
		/* setup MAL tx & rx channel pointers */
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_RXBADDR, 0x0);
		mtdcr (MAL0_TXCTP2R, hw_p->tx_phys);
		mtdcr (MAL0_RXCTP2R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS2, ENET_MAX_MTU_ALIGNED / 16);
		break;
	case 3:
		/* setup MAL tx & rx channel pointers */
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_TXCTP3R, hw_p->tx_phys);
		mtdcr (MAL0_RXBADDR, 0x0);
		mtdcr (MAL0_RXCTP3R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS3, ENET_MAX_MTU_ALIGNED / 16);
		break;
#endif /* CONFIG_440GX */
#if defined (CONFIG_460GT)
	case 2:
		/* setup MAL tx & rx channel pointers */
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_RXBADDR, 0x0);
		mtdcr (MAL0_TXCTP2R, hw_p->tx_phys);
		mtdcr (MAL0_RXCTP16R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS16, ENET_MAX_MTU_ALIGNED / 16);
		break;
	case 3:
		/* setup MAL tx & rx channel pointers */
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_RXBADDR, 0x0);
		mtdcr (MAL0_TXCTP3R, hw_p->tx_phys);
		mtdcr (MAL0_RXCTP24R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS24, ENET_MAX_MTU_ALIGNED / 16);
		break;
#endif /* CONFIG_460GT */
	case 0:
	default:
		/* setup MAL tx & rx channel pointers */
#if defined(CONFIG_440)
		mtdcr (MAL0_TXBADDR, 0x0);
		mtdcr (MAL0_RXBADDR, 0x0);
#endif
		mtdcr (MAL0_TXCTP0R, hw_p->tx_phys);
		mtdcr (MAL0_RXCTP0R, hw_p->rx_phys);
		/* set RX buffer size */
		mtdcr (MAL0_RCBS0, ENET_MAX_MTU_ALIGNED / 16);
		break;
	}

	/* Enable MAL transmit and receive channels */
#if defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
	mtdcr (MAL0_TXCASR, (MAL_TXRX_CASR >> (hw_p->devnum*2)));
#else
	mtdcr (MAL0_TXCASR, (MAL_TXRX_CASR >> hw_p->devnum));
#endif
	mtdcr (MAL0_RXCASR, (MAL_TXRX_CASR >> hw_p->devnum));

	/* set transmit enable & receive enable */
	out_be32((void *)EMAC0_MR0 + hw_p->hw_addr, EMAC_MR0_TXE | EMAC_MR0_RXE);

	mode_reg = in_be32((void *)EMAC0_MR1 + hw_p->hw_addr);

	/* set rx-/tx-fifo size */
	mode_reg = (mode_reg & ~EMAC_MR1_FIFO_MASK) | EMAC_MR1_FIFO_SIZE;

	/* set speed */
	if (speed == _1000BASET) {
#if defined(CONFIG_440SP) || defined(CONFIG_440SPE)
		unsigned long pfc1;

		mfsdr (SDR0_PFC1, pfc1);
		pfc1 |= SDR0_PFC1_EM_1000;
		mtsdr (SDR0_PFC1, pfc1);
#endif
		mode_reg = mode_reg | EMAC_MR1_MF_1000MBPS | EMAC_MR1_IST;
	} else if (speed == _100BASET)
		mode_reg = mode_reg | EMAC_MR1_MF_100MBPS | EMAC_MR1_IST;
	else
		mode_reg = mode_reg & ~0x00C00000;	/* 10 MBPS */
	if (duplex == FULL)
		mode_reg = mode_reg | 0x80000000 | EMAC_MR1_IST;

	out_be32((void *)EMAC0_MR1 + hw_p->hw_addr, mode_reg);

	/* Enable broadcast and indvidual address */
	/* TBS: enabling runts as some misbehaved nics will send runts */
	out_be32((void *)EMAC0_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 */
	out_be32((void *)EMAC0_TRTR + hw_p->hw_addr, 0x18000000);	/* 256 byte threshold */

	/* set receive	low/high water mark register */
#if defined(CONFIG_440)
	/* 440s has a 64 byte burst length */
	out_be32((void *)EMAC0_RX_HI_LO_WMARK + hw_p->hw_addr, 0x80009000);
#else
	/* 405s have a 16 byte burst length */
	out_be32((void *)EMAC0_RX_HI_LO_WMARK + hw_p->hw_addr, 0x0f002000);
#endif /* defined(CONFIG_440) */
	out_be32((void *)EMAC0_TMR1 + hw_p->hw_addr, 0xf8640000);

	/* Set fifo limit entry in tx mode 0 */
	out_be32((void *)EMAC0_TMR0 + hw_p->hw_addr, 0x00000003);
	/* Frame gap set */
	out_be32((void *)EMAC0_I_FRAME_GAP_REG + hw_p->hw_addr, 0x00000008);

	/* Set EMAC IER */
	hw_p->emac_ier = EMAC_ISR_PTLE | EMAC_ISR_BFCS | EMAC_ISR_ORE | EMAC_ISR_IRE;
	if (speed == _100BASET)
		hw_p->emac_ier = hw_p->emac_ier | EMAC_ISR_SYE;

	out_be32((void *)EMAC0_ISR + hw_p->hw_addr, 0xffffffff);	/* clear pending interrupts */
	out_be32((void *)EMAC0_IER + hw_p->hw_addr, hw_p->emac_ier);

	if (hw_p->first_init == 0) {
		/*
		 * Connect interrupt service routines
		 */
		irq_install_handler(ETH_IRQ_NUM(hw_p->devnum),
				    (interrupt_handler_t *) enetInt, dev);
	}

	mtmsr (msr);		/* enable interrupts again */

	hw_p->bis = bis;
	hw_p->first_init = 1;

	return 0;
}


static int ppc_4xx_eth_send(struct eth_device *dev, void *ptr, int len)
{
	struct enet_frame *ef_ptr;
	ulong time_start, time_now;
	unsigned long temp_txm0;
	EMAC_4XX_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);
	flush_dcache_range((u32)hw_p->txbuf_ptr, (u32)hw_p->txbuf_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;

	sync();

	out_be32((void *)EMAC0_TMR0 + hw_p->hw_addr,
		 in_be32((void *)EMAC0_TMR0 + hw_p->hw_addr) | EMAC_TMR0_GNP0);
#ifdef INFO_4XX_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 = in_be32((void *)EMAC0_TMR0 + hw_p->hw_addr);
		/* loop until either TINT turns on or 3 seconds elapse */
		if ((temp_txm0 & EMAC_TMR0_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 */
	u32 mal_isr;
	u32 emac_isr = 0;
	u32 mal_eob;
	u32 uic_mal;
	u32 uic_mal_err;
	u32 uic_emac;
	u32 uic_emac_b;
	EMAC_4XX_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;

		uic_mal = mfdcr(UIC_BASE_MAL + UIC_MSR);
		uic_mal_err = mfdcr(UIC_BASE_MAL_ERR + UIC_MSR);
		uic_emac = mfdcr(UIC_BASE_EMAC + UIC_MSR);
		uic_emac_b = mfdcr(UIC_BASE_EMAC_B + UIC_MSR);

		if (!(uic_mal & (UIC_MAL_RXEOB | UIC_MAL_TXEOB))
		    && !(uic_mal_err & (UIC_MAL_SERR | UIC_MAL_TXDE | UIC_MAL_RXDE))
		    && !(uic_emac & UIC_ETHx) && !(uic_emac_b & UIC_ETHxB)) {
			/* not for us */
			return (rc);
		}

		/* get and clear controller status interrupts */
		/* look at MAL and EMAC error interrupts */
		if (uic_mal_err & (UIC_MAL_SERR | UIC_MAL_TXDE | UIC_MAL_RXDE)) {
			/* we have a MAL error interrupt */
			mal_isr = mfdcr(MAL0_ESR);
			mal_err(dev, mal_isr, uic_mal_err,
				 MAL_UIC_DEF, MAL_UIC_ERR);

			/* clear MAL error interrupt status bits */
			mtdcr(UIC_BASE_MAL_ERR + UIC_SR,
			      UIC_MAL_SERR | UIC_MAL_TXDE | UIC_MAL_RXDE);

			return -1;
		}

		/* look for EMAC errors */
		if ((uic_emac & UIC_ETHx) || (uic_emac_b & UIC_ETHxB)) {
			emac_isr = in_be32((void *)EMAC0_ISR + hw_p->hw_addr);
			emac_err(dev, emac_isr);

			/* clear EMAC error interrupt status bits */
			mtdcr(UIC_BASE_EMAC + UIC_SR, UIC_ETHx);
			mtdcr(UIC_BASE_EMAC_B + UIC_SR, UIC_ETHxB);

			return -1;
		}

		/* handle MAX TX EOB interrupt from a tx */
		if (uic_mal & UIC_MAL_TXEOB) {
			/* clear MAL interrupt status bits */
			mal_eob = mfdcr(MAL0_TXEOBISR);
			mtdcr(MAL0_TXEOBISR, mal_eob);
			mtdcr(UIC_BASE_MAL + UIC_SR, UIC_MAL_TXEOB);

			/* indicate that we serviced an interrupt */
			serviced = 1;
			rc = 0;
		}

		/* handle MAL RX EOB interrupt from a receive */
		/* check for EOB on valid channels	     */
		if (uic_mal & UIC_MAL_RXEOB) {
			mal_eob = mfdcr(MAL0_RXEOBISR);
			if (mal_eob &
			    (0x80000000 >> (hw_p->devnum * MAL_RX_CHAN_MUL))) {
				/* push packet to upper layer */
				enet_rcv(dev, emac_isr);

				/* clear MAL interrupt status bits */
				mtdcr(UIC_BASE_MAL + UIC_SR, UIC_MAL_RXEOB);

				/* indicate that we serviced an interrupt */
				serviced = 1;
				rc = 0;
			}
		}
#if defined(CONFIG_405EZ)
		/*
		 * On 405EZ the RX-/TX-interrupts are coalesced into
		 * one IRQ bit in the UIC. We need to acknowledge the
		 * RX-/TX-interrupts in the SDR0_ICINTSTAT reg as well.
		 */
		mtsdr(SDR0_ICINTSTAT,
		      SDR_ICRX_STAT | SDR_ICTX0_STAT | SDR_ICTX1_STAT);
#endif  /* defined(CONFIG_405EZ) */
	} 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)
{
	mtdcr (MAL0_ESR, isr);	/* clear interrupt */

	/* clear DE interrupt */
	mtdcr (MAL0_TXDEIR, 0xC0000000);
	mtdcr (MAL0_RXDEIR, 0x80000000);

#ifdef INFO_4XX_ENET
	printf("\nMAL error occurred.... ISR = %lx UIC = = %lx	MAL_DEF = %lx  MAL_ERR= %lx\n",
	       isr, uic, maldef, mal_errr);
#endif

	eth_init();	/* start again... */
}

/*-----------------------------------------------------------------------------+
 *  EMAC Error Routine
 *-----------------------------------------------------------------------------*/
static void emac_err (struct eth_device *dev, unsigned long isr)
{
	EMAC_4XX_HW_PST hw_p = dev->priv;

	printf ("EMAC%d error occurred.... ISR = %lx\n", hw_p->devnum, isr);
	out_be32((void *)EMAC0_ISR + hw_p->hw_addr, isr);
}

/*-----------------------------------------------------------------------------+
 *  enet_rcv() handles the ethernet receive data
 *-----------------------------------------------------------------------------*/
static void enet_rcv (struct eth_device *dev, unsigned long malisr)
{
	unsigned long data_len;
	unsigned long rx_eob_isr;
	EMAC_4XX_HW_PST hw_p = dev->priv;

	int handled = 0;
	int i;
	int loop_count = 0;

	rx_eob_isr = mfdcr (MAL0_RXEOBISR);
	if ((0x80000000 >> (hw_p->devnum * MAL_RX_CHAN_MUL)) & rx_eob_isr) {
		/* clear EOB */
		mtdcr (MAL0_RXEOBISR, 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++;
			handled++;
			data_len = (unsigned long) hw_p->rx[i].data_len & 0x0fff;	/* 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;
#ifdef INFO_4XX_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;

				hw_p->rx_slot++;
				if (NUM_RX_BUFF == hw_p->rx_slot)
					hw_p->rx_slot = 0;

				/*  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_4xx_eth_rx (struct eth_device *dev)
{
	int length;
	int user_index;
	unsigned long msr;
	EMAC_4XX_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 & 0x0fff;

		/*
		 * Pass the packet up to the protocol layers.
		 * net_process_received_packet(net_rx_packets[rxIdx],
		 *			       length - 4);
		 * net_process_received_packet(net_rx_packets[i], length);
		 */
		invalidate_dcache_range((u32)hw_p->rx[user_index].data_ptr,
					(u32)hw_p->rx[user_index].data_ptr +
					length - 4);
		net_process_received_packet(net_rx_packets[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_4XX_ENET
		hw_p->stats.pkts_handled++;
#endif

		mtmsr (msr);	/* Enable IRQ's */
	}

	hw_p->is_receiving = 0; /* tell driver */

	return length;
}

int ppc_4xx_eth_initialize (bd_t * bis)
{
	static int virgin = 0;
	struct eth_device *dev;
	int eth_num = 0;
	EMAC_4XX_HW_PST hw = NULL;
	u8 ethaddr[4 + CONFIG_EMAC_NR_START][6];
	u32 hw_addr[4];
	u32 mal_ier;

#if defined(CONFIG_440GX)
	unsigned long pfc1;

	mfsdr (SDR0_PFC1, pfc1);
	pfc1 &= ~(0x01e00000);
	pfc1 |= 0x01200000;
	mtsdr (SDR0_PFC1, pfc1);
#endif

	/* first clear all mac-addresses */
	for (eth_num = 0; eth_num < LAST_EMAC_NUM; eth_num++)
		memcpy(ethaddr[eth_num], "\0\0\0\0\0\0", 6);

	for (eth_num = 0; eth_num < LAST_EMAC_NUM; eth_num++) {
		int ethaddr_idx = eth_num + CONFIG_EMAC_NR_START;
		switch (eth_num) {
		default:		/* fall through */
		case 0:
			eth_getenv_enetaddr("ethaddr", ethaddr[ethaddr_idx]);
			hw_addr[eth_num] = 0x0;
			break;
#ifdef CONFIG_HAS_ETH1
		case 1:
			eth_getenv_enetaddr("eth1addr", ethaddr[ethaddr_idx]);
			hw_addr[eth_num] = 0x100;
			break;
#endif
#ifdef CONFIG_HAS_ETH2
		case 2:
			eth_getenv_enetaddr("eth2addr", ethaddr[ethaddr_idx]);
#if defined(CONFIG_460GT)
			hw_addr[eth_num] = 0x300;
#else
			hw_addr[eth_num] = 0x400;
#endif
			break;
#endif
#ifdef CONFIG_HAS_ETH3
		case 3:
			eth_getenv_enetaddr("eth3addr", ethaddr[ethaddr_idx]);
#if defined(CONFIG_460GT)
			hw_addr[eth_num] = 0x400;
#else
			hw_addr[eth_num] = 0x600;
#endif
			break;
#endif
		}
	}

	/* set phy num and mode */
	bis->bi_phynum[0] = CONFIG_PHY_ADDR;
	bis->bi_phymode[0] = 0;

#if defined(CONFIG_PHY1_ADDR)
	bis->bi_phynum[1] = CONFIG_PHY1_ADDR;
	bis->bi_phymode[1] = 0;
#endif
#if defined(CONFIG_440GX)
	bis->bi_phynum[2] = CONFIG_PHY2_ADDR;
	bis->bi_phynum[3] = CONFIG_PHY3_ADDR;
	bis->bi_phymode[2] = 2;
	bis->bi_phymode[3] = 2;
#endif

#if defined(CONFIG_440GX) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_405EX)
	ppc_4xx_eth_setup_bridge(0, bis);
#endif

	for (eth_num = 0; eth_num < LAST_EMAC_NUM; eth_num++) {
		/*
		 * See if we can actually bring up the interface,
		 * otherwise, skip it
		 */
		if (memcmp (ethaddr[eth_num], "\0\0\0\0\0\0", 6) == 0) {
			bis->bi_phymode[eth_num] = BI_PHYMODE_NONE;
			continue;
		}

		/* Allocate device structure */
		dev = (struct eth_device *) malloc (sizeof (*dev));
		if (dev == NULL) {
			printf ("ppc_4xx_eth_initialize: "
				"Cannot allocate eth_device %d\n", eth_num);
			return (-1);
		}
		memset(dev, 0, sizeof(*dev));

		/* Allocate our private use data */
		hw = (EMAC_4XX_HW_PST) malloc (sizeof (*hw));
		if (hw == NULL) {
			printf ("ppc_4xx_eth_initialize: "
				"Cannot allocate private hw data for eth_device %d",
				eth_num);
			free (dev);
			return (-1);
		}
		memset(hw, 0, sizeof(*hw));

		hw->hw_addr = hw_addr[eth_num];
		memcpy (dev->enetaddr, ethaddr[eth_num], 6);
		hw->devnum = eth_num;
		hw->print_speed = 1;

		sprintf (dev->name, "ppc_4xx_eth%d", eth_num - CONFIG_EMAC_NR_START);
		dev->priv = (void *) hw;
		dev->init = ppc_4xx_eth_init;
		dev->halt = ppc_4xx_eth_halt;
		dev->send = ppc_4xx_eth_send;
		dev->recv = ppc_4xx_eth_rx;

		eth_register(dev);

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
		int retval;
		struct mii_dev *mdiodev = mdio_alloc();
		if (!mdiodev)
			return -ENOMEM;
		strncpy(mdiodev->name, dev->name, MDIO_NAME_LEN);
		mdiodev->read = emac4xx_miiphy_read;
		mdiodev->write = emac4xx_miiphy_write;

		retval = mdio_register(mdiodev);
		if (retval < 0)
			return retval;
#endif

		if (0 == virgin) {
			/* set the MAL IER ??? names may change with new spec ??? */
#if defined(CONFIG_440SPE) || \
    defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
    defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
    defined(CONFIG_405EX)
			mal_ier =
				MAL_IER_PT | MAL_IER_PRE | MAL_IER_PWE |
				MAL_IER_DE | MAL_IER_OTE | MAL_IER_OE | MAL_IER_PE ;
#else
			mal_ier =
				MAL_IER_DE | MAL_IER_NE | MAL_IER_TE |
				MAL_IER_OPBE | MAL_IER_PLBE;
#endif
			mtdcr (MAL0_ESR, 0xffffffff);	/* clear pending interrupts */
			mtdcr (MAL0_TXDEIR, 0xffffffff);	/* clear pending interrupts */
			mtdcr (MAL0_RXDEIR, 0xffffffff);	/* clear pending interrupts */
			mtdcr (MAL0_IER, mal_ier);

			/* install MAL interrupt handler */
			irq_install_handler (VECNUM_MAL_SERR,
					     (interrupt_handler_t *) enetInt,
					     dev);
			irq_install_handler (VECNUM_MAL_TXEOB,
					     (interrupt_handler_t *) enetInt,
					     dev);
			irq_install_handler (VECNUM_MAL_RXEOB,
					     (interrupt_handler_t *) enetInt,
					     dev);
			irq_install_handler (VECNUM_MAL_TXDE,
					     (interrupt_handler_t *) enetInt,
					     dev);
			irq_install_handler (VECNUM_MAL_RXDE,
					     (interrupt_handler_t *) enetInt,
					     dev);
			virgin = 1;
		}
	}			/* end for each supported device */

	return 0;
}