drivers/net/lpc32xx_eth.c - platform/external/u-boot - Gitiles

 /*
  * LPC32xx Ethernet MAC interface driver
  *
  * (C) Copyright 2014  DENX Software Engineering GmbH
  * Written-by: Albert ARIBAUD - 3ADEV <albert.aribaud@3adev.fr>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */

 #include <common.h>
 #include <net.h>
 #include <malloc.h>
 #include <miiphy.h>
 #include <asm/io.h>
 #include <linux/errno.h>
 #include <asm/types.h>
 #include <asm/system.h>
 #include <asm/byteorder.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/config.h>

 /*
  * Notes:
  *
  * 1. Unless specified otherwise, all references to tables or paragraphs
  *    are to UM10326, "LPC32x0 and LPC32x0/01 User manual".
  *
  * 2. Only bitfield masks/values which are actually used by the driver
  *    are defined.
  */

 /* a single RX descriptor. The controller has an array of these */
 struct lpc32xx_eth_rxdesc {
 	u32 packet;		/* Receive packet pointer */
 	u32 control;		/* Descriptor command status */
 };

 #define LPC32XX_ETH_RX_DESC_SIZE (sizeof(struct lpc32xx_eth_rxdesc))

 /* RX control bitfields/masks (see Table 330) */
 #define LPC32XX_ETH_RX_CTRL_SIZE_MASK 0x000007FF
 #define LPC32XX_ETH_RX_CTRL_UNUSED    0x7FFFF800
 #define LPC32XX_ETH_RX_CTRL_INTERRUPT 0x80000000

 /* a single RX status. The controller has an array of these */
 struct lpc32xx_eth_rxstat {
 	u32 statusinfo;		/* Transmit Descriptor status */
 	u32 statushashcrc;	/* Transmit Descriptor CRCs */
 };

 #define LPC32XX_ETH_RX_STAT_SIZE (sizeof(struct lpc32xx_eth_rxstat))

 /* RX statusinfo bitfields/masks (see Table 333) */
 #define RX_STAT_RXSIZE 0x000007FF
 /* Helper: OR of all errors except RANGE */
 #define RX_STAT_ERRORS 0x1B800000

 /* a single TX descriptor. The controller has an array of these */
 struct lpc32xx_eth_txdesc {
 	u32 packet;		/* Transmit packet pointer */
 	u32 control;		/* Descriptor control */
 };

 #define LPC32XX_ETH_TX_DESC_SIZE (sizeof(struct lpc32xx_eth_txdesc))

 /* TX control bitfields/masks (see Table 335) */
 #define TX_CTRL_TXSIZE    0x000007FF
 #define TX_CTRL_LAST      0x40000000

 /* a single TX status. The controller has an array of these */
 struct lpc32xx_eth_txstat {
 	u32 statusinfo;		/* Transmit Descriptor status */
 };

 #define LPC32XX_ETH_TX_STAT_SIZE (sizeof(struct lpc32xx_eth_txstat))

 /* Ethernet MAC interface registers (see Table 283) */
 struct lpc32xx_eth_registers {
 	/* MAC registers - 0x3106_0000 to 0x3106_01FC */
 	u32 mac1;		/* MAC configuration register 1 */
 	u32 mac2;		/* MAC configuration register 2 */
 	u32 ipgt;		/* Back-to-back Inter-Packet Gap reg. */
 	u32 ipgr;		/* Non-back-to-back IPG register */
 	u32 clrt;		/* Collision Window / Retry register */
 	u32 maxf;		/* Maximum Frame register */
 	u32 supp;		/* Phy Support register */
 	u32 test;
 	u32 mcfg;		/* MII management configuration reg. */
 	u32 mcmd;		/* MII management command register */
 	u32 madr;		/* MII management address register */
 	u32 mwtd;		/* MII management wite data register */
 	u32 mrdd;		/* MII management read data register */
 	u32 mind;		/* MII management indicators register */
 	u32 reserved1[2];
 	u32 sa0;		/* Station address register 0 */
 	u32 sa1;		/* Station address register 1 */
 	u32 sa2;		/* Station address register 2 */
 	u32 reserved2[45];
 	/* Control registers */
 	u32 command;
 	u32 status;
 	u32 rxdescriptor;
 	u32 rxstatus;
 	u32 rxdescriptornumber;	/* actually, number MINUS ONE */
 	u32 rxproduceindex;	/* head of rx desc fifo */
 	u32 rxconsumeindex;	/* tail of rx desc fifo */
 	u32 txdescriptor;
 	u32 txstatus;
 	u32 txdescriptornumber;	/* actually, number MINUS ONE */
 	u32 txproduceindex;	/* head of rx desc fifo */
 	u32 txconsumeindex;	/* tail of rx desc fifo */
 	u32 reserved3[10];
 	u32 tsv0;		/* Transmit status vector register 0 */
 	u32 tsv1;		/* Transmit status vector register 1 */
 	u32 rsv;		/* Receive status vector register */
 	u32 reserved4[3];
 	u32 flowcontrolcounter;
 	u32 flowcontrolstatus;
 	u32 reserved5[34];
 	/* RX filter registers - 0x3106_0200 to 0x3106_0FDC */
 	u32 rxfilterctrl;
 	u32 rxfilterwolstatus;
 	u32 rxfilterwolclear;
 	u32 reserved6;
 	u32 hashfilterl;
 	u32 hashfilterh;
 	u32 reserved7[882];
 	/* Module control registers - 0x3106_0FE0 to 0x3106_0FF8 */
 	u32 intstatus;		/* Interrupt status register */
 	u32 intenable;
 	u32 intclear;
 	u32 intset;
 	u32 reserved8;
 	u32 powerdown;
 	u32 reserved9;
 };

 /* MAC1 register bitfields/masks and offsets (see Table 283) */
 #define MAC1_RECV_ENABLE        0x00000001
 #define MAC1_PASS_ALL_RX_FRAMES 0x00000002
 #define MAC1_SOFT_RESET         0x00008000
 /* Helper: general reset */
 #define MAC1_RESETS             0x0000CF00

 /* MAC2 register bitfields/masks and offsets (see Table 284) */
 #define MAC2_FULL_DUPLEX    0x00000001
 #define MAC2_CRC_ENABLE     0x00000010
 #define MAC2_PAD_CRC_ENABLE 0x00000020

 /* SUPP register bitfields/masks and offsets (see Table 290) */
 #define SUPP_SPEED 0x00000100

 /* MCFG register bitfields/masks and offsets (see Table 292) */
 #define MCFG_RESET_MII_MGMT     0x00008000
 /* divide clock by 28 (see Table 293) */
 #define MCFG_CLOCK_SELECT_DIV28 0x0000001C

 /* MADR register bitfields/masks and offsets (see Table 295) */
 #define MADR_REG_MASK   0x0000001F
 #define MADR_PHY_MASK   0x00001F00
 #define MADR_REG_OFFSET 0
 #define MADR_PHY_OFFSET 8

 /* MIND register bitfields/masks (see Table 298) */
 #define MIND_BUSY      0x00000001

 /* COMMAND register bitfields/masks and offsets (see Table 283) */
 #define COMMAND_RXENABLE      0x00000001
 #define COMMAND_TXENABLE      0x00000002
 #define COMMAND_PASSRUNTFRAME 0x00000040
 #define COMMAND_RMII          0x00000200
 #define COMMAND_FULL_DUPLEX   0x00000400
 /* Helper: general reset */
 #define COMMAND_RESETS        0x00000038

 /* STATUS register bitfields/masks and offsets (see Table 283) */
 #define STATUS_RXSTATUS 0x00000001
 #define STATUS_TXSTATUS 0x00000002

 /* RXFILTERCTRL register bitfields/masks (see Table 319) */
 #define RXFILTERCTRL_ACCEPTBROADCAST 0x00000002
 #define RXFILTERCTRL_ACCEPTPERFECT   0x00000020

 /* Buffers and descriptors */

 #define ATTRS(n) __aligned(n)

 #define TX_BUF_COUNT 4
 #define RX_BUF_COUNT 4

 struct lpc32xx_eth_buffers {
 	ATTRS(4) struct lpc32xx_eth_txdesc tx_desc[TX_BUF_COUNT];
 	ATTRS(4) struct lpc32xx_eth_txstat tx_stat[TX_BUF_COUNT];
 	ATTRS(PKTALIGN) u8 tx_buf[TX_BUF_COUNT*PKTSIZE_ALIGN];
 	ATTRS(4) struct lpc32xx_eth_rxdesc rx_desc[RX_BUF_COUNT];
 	ATTRS(8) struct lpc32xx_eth_rxstat rx_stat[RX_BUF_COUNT];
 	ATTRS(PKTALIGN) u8 rx_buf[RX_BUF_COUNT*PKTSIZE_ALIGN];
 };

 /* port device data struct */
 struct lpc32xx_eth_device {
 	struct eth_device dev;
 	struct lpc32xx_eth_registers *regs;
 	struct lpc32xx_eth_buffers *bufs;
 	bool phy_rmii;
 };

 #define LPC32XX_ETH_DEVICE_SIZE (sizeof(struct lpc32xx_eth_device))

 /* generic macros */
 #define to_lpc32xx_eth(_d) container_of(_d, struct lpc32xx_eth_device, dev)

 /* timeout for MII polling */
 #define MII_TIMEOUT 10000000

 /* limits for PHY and register addresses */
 #define MII_MAX_REG (MADR_REG_MASK >> MADR_REG_OFFSET)

 #define MII_MAX_PHY (MADR_PHY_MASK >> MADR_PHY_OFFSET)

 #if defined(CONFIG_PHYLIB) || defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
 /*
  * mii_reg_read - miiphy_read callback function.
  *
  * Returns 16bit phy register value, or 0xffff on error
  */
 static int mii_reg_read(struct mii_dev *bus, int phy_adr, int devad,
 			int reg_ofs)
 {
 	u16 data = 0;
 	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
 	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
 	u32 mind_reg;
 	u32 timeout;

 	/* check parameters */
 	if (phy_adr > MII_MAX_PHY) {
 		printf("%s:%u: Invalid PHY address %d\n",
 		       __func__, __LINE__, phy_adr);
 		return -EFAULT;
 	}
 	if (reg_ofs > MII_MAX_REG) {
 		printf("%s:%u: Invalid register offset %d\n",
 		       __func__, __LINE__, reg_ofs);
 		return -EFAULT;
 	}

 	/* write the phy and reg addressse into the MII address reg */
 	writel((phy_adr << MADR_PHY_OFFSET) | (reg_ofs << MADR_REG_OFFSET),
 	       &regs->madr);

 	/* write 1 to the MII command register to cause a read */
 	writel(1, &regs->mcmd);

 	/* wait till the MII is not busy */
 	timeout = MII_TIMEOUT;
 	do {
 		/* read MII indicators register */
 		mind_reg = readl(&regs->mind);
 		if (--timeout == 0)
 			break;
 	} while (mind_reg & MIND_BUSY);

 	/* write 0 to the MII command register to finish the read */
 	writel(0, &regs->mcmd);

 	if (timeout == 0) {
 		printf("%s:%u: MII busy timeout\n", __func__, __LINE__);
 		return -EFAULT;
 	}

 	data = (u16) readl(&regs->mrdd);

 	debug("%s:(adr %d, off %d) => %04x\n", __func__, phy_adr,
 	      reg_ofs, data);

 	return data;
 }

 /*
  * mii_reg_write - imiiphy_write callback function.
  *
  * Returns 0 if write succeed, -EINVAL on bad parameters
  * -ETIME on timeout
  */
 static int mii_reg_write(struct mii_dev *bus, int phy_adr, int devad,
 			 int reg_ofs, u16 data)
 {
 	struct eth_device *dev = eth_get_dev_by_name(bus->name);
 	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
 	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
 	u32 mind_reg;
 	u32 timeout;

 	/* check parameters */
 	if (phy_adr > MII_MAX_PHY) {
 		printf("%s:%u: Invalid PHY address %d\n",
 		       __func__, __LINE__, phy_adr);
 		return -EFAULT;
 	}
 	if (reg_ofs > MII_MAX_REG) {
 		printf("%s:%u: Invalid register offset %d\n",
 		       __func__, __LINE__, reg_ofs);
 		return -EFAULT;
 	}

 	/* write the phy and reg addressse into the MII address reg */
 	writel((phy_adr << MADR_PHY_OFFSET) | (reg_ofs << MADR_REG_OFFSET),
 	       &regs->madr);

 	/* write data to the MII write register */
 	writel(data, &regs->mwtd);

 	/* wait till the MII is not busy */
 	timeout = MII_TIMEOUT;
 	do {
 		/* read MII indicators register */
 		mind_reg = readl(&regs->mind);
 		if (--timeout == 0)
 			break;
 	} while (mind_reg & MIND_BUSY);

 	if (timeout == 0) {
 		printf("%s:%u: MII busy timeout\n", __func__,
 		       __LINE__);
 		return -EFAULT;
 	}

 	/*debug("%s:(adr %d, off %d) <= %04x\n", __func__, phy_adr,
 		reg_ofs, data);*/

 	return 0;
 }
 #endif

 /*
  * Provide default Ethernet buffers base address if target did not.
  * Locate buffers in SRAM at 0x00001000 to avoid cache issues and
  * maximize throughput.
  */
 #if !defined(CONFIG_LPC32XX_ETH_BUFS_BASE)
 #define CONFIG_LPC32XX_ETH_BUFS_BASE 0x00001000
 #endif

 static struct lpc32xx_eth_device lpc32xx_eth = {
 	.regs = (struct lpc32xx_eth_registers *)LPC32XX_ETH_BASE,
 	.bufs = (struct lpc32xx_eth_buffers *)CONFIG_LPC32XX_ETH_BUFS_BASE,
 #if defined(CONFIG_RMII)
 	.phy_rmii = true,
 #endif
 };

 #define TX_TIMEOUT 10000

 static int lpc32xx_eth_send(struct eth_device *dev, void *dataptr, int datasize)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
 	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
 	int timeout, tx_index;

 	/* time out if transmit descriptor array remains full too long */
 	timeout = TX_TIMEOUT;
 	while ((readl(&regs->status) & STATUS_TXSTATUS) &&
 	       (readl(&regs->txconsumeindex)
 	       == readl(&regs->txproduceindex))) {
 		if (timeout-- == 0)
 			return -1;
 	}

 	/* determine next transmit packet index to use */
 	tx_index = readl(&regs->txproduceindex);

 	/* set up transmit packet */
 	writel((u32)dataptr, &bufs->tx_desc[tx_index].packet);
 	writel(TX_CTRL_LAST | ((datasize - 1) & TX_CTRL_TXSIZE),
 	       &bufs->tx_desc[tx_index].control);
 	writel(0, &bufs->tx_stat[tx_index].statusinfo);

 	/* pass transmit packet to DMA engine */
 	tx_index = (tx_index + 1) % TX_BUF_COUNT;
 	writel(tx_index, &regs->txproduceindex);

 	/* transmission succeeded */
 	return 0;
 }

 #define RX_TIMEOUT 1000000

 static int lpc32xx_eth_recv(struct eth_device *dev)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
 	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
 	int timeout, rx_index;

 	/* time out if receive descriptor array remains empty too long */
 	timeout = RX_TIMEOUT;
 	while (readl(&regs->rxproduceindex) == readl(&regs->rxconsumeindex)) {
 		if (timeout-- == 0)
 			return -1;
 	}

 	/* determine next receive packet index to use */
 	rx_index = readl(&regs->rxconsumeindex);

 	/* if data was valid, pass it on */
 	if (!(bufs->rx_stat[rx_index].statusinfo & RX_STAT_ERRORS)) {
 		net_process_received_packet(
 			&(bufs->rx_buf[rx_index * PKTSIZE_ALIGN]),
 			(bufs->rx_stat[rx_index].statusinfo
 			 & RX_STAT_RXSIZE) + 1);
 	}

 	/* pass receive slot back to DMA engine */
 	rx_index = (rx_index + 1) % RX_BUF_COUNT;
 	writel(rx_index, &regs->rxconsumeindex);

 	/* reception successful */
 	return 0;
 }

 static int lpc32xx_eth_write_hwaddr(struct eth_device *dev)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;

 	/* Save station address */
 	writel((unsigned long) (dev->enetaddr[0] |
 		(dev->enetaddr[1] << 8)), &regs->sa2);
 	writel((unsigned long) (dev->enetaddr[2] |
 		(dev->enetaddr[3] << 8)), &regs->sa1);
 	writel((unsigned long) (dev->enetaddr[4] |
 		(dev->enetaddr[5] << 8)), &regs->sa0);

 	return 0;
 }

 static int lpc32xx_eth_init(struct eth_device *dev)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
 	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
 	int index;

 	/* Initial MAC initialization */
 	writel(MAC1_PASS_ALL_RX_FRAMES, &regs->mac1);
 	writel(MAC2_PAD_CRC_ENABLE | MAC2_CRC_ENABLE, &regs->mac2);
 	writel(PKTSIZE_ALIGN, &regs->maxf);

 	/* Retries: 15 (0xF). Collision window: 57 (0x37). */
 	writel(0x370F, &regs->clrt);

 	/* Set IP gap pt 2 to default 0x12 but pt 1 to non-default 0 */
 	writel(0x0012, &regs->ipgr);

 	/* pass runt (smaller than 64 bytes) frames */
 	if (lpc32xx_eth_device->phy_rmii)
 		writel(COMMAND_PASSRUNTFRAME | COMMAND_RMII, &regs->command);
 	else
 		writel(COMMAND_PASSRUNTFRAME, &regs->command);

 	/* Configure Full/Half Duplex mode */
 	if (miiphy_duplex(dev->name, CONFIG_PHY_ADDR) == FULL) {
 		setbits_le32(&regs->mac2, MAC2_FULL_DUPLEX);
 		setbits_le32(&regs->command, COMMAND_FULL_DUPLEX);
 		writel(0x15, &regs->ipgt);
 	} else {
 		writel(0x12, &regs->ipgt);
 	}

 	/* Configure 100MBit/10MBit mode */
 	if (miiphy_speed(dev->name, CONFIG_PHY_ADDR) == _100BASET)
 		writel(SUPP_SPEED, &regs->supp);
 	else
 		writel(0, &regs->supp);

 	/* Save station address */
 	writel((unsigned long) (dev->enetaddr[0] |
 		(dev->enetaddr[1] << 8)), &regs->sa2);
 	writel((unsigned long) (dev->enetaddr[2] |
 		(dev->enetaddr[3] << 8)), &regs->sa1);
 	writel((unsigned long) (dev->enetaddr[4] |
 		(dev->enetaddr[5] << 8)), &regs->sa0);

 	/* set up transmit buffers */
 	for (index = 0; index < TX_BUF_COUNT; index++) {
 		bufs->tx_desc[index].control = 0;
 		bufs->tx_stat[index].statusinfo = 0;
 	}
 	writel((u32)(&bufs->tx_desc), (u32 *)&regs->txdescriptor);
 	writel((u32)(&bufs->tx_stat), &regs->txstatus);
 	writel(TX_BUF_COUNT-1, &regs->txdescriptornumber);

 	/* set up receive buffers */
 	for (index = 0; index < RX_BUF_COUNT; index++) {
 		bufs->rx_desc[index].packet =
 			(u32) (bufs->rx_buf+index*PKTSIZE_ALIGN);
 		bufs->rx_desc[index].control = PKTSIZE_ALIGN - 1;
 		bufs->rx_stat[index].statusinfo = 0;
 		bufs->rx_stat[index].statushashcrc = 0;
 	}
 	writel((u32)(&bufs->rx_desc), &regs->rxdescriptor);
 	writel((u32)(&bufs->rx_stat), &regs->rxstatus);
 	writel(RX_BUF_COUNT-1, &regs->rxdescriptornumber);

 	/* Enable broadcast and matching address packets */
 	writel(RXFILTERCTRL_ACCEPTBROADCAST |
 		RXFILTERCTRL_ACCEPTPERFECT, &regs->rxfilterctrl);

 	/* Clear and disable interrupts */
 	writel(0xFFFF, &regs->intclear);
 	writel(0, &regs->intenable);

 	/* Enable receive and transmit mode of MAC ethernet core */
 	setbits_le32(&regs->command, COMMAND_RXENABLE | COMMAND_TXENABLE);
 	setbits_le32(&regs->mac1, MAC1_RECV_ENABLE);

 	/*
 	 * Perform a 'dummy' first send to work around Ethernet.1
 	 * erratum (see ES_LPC3250 rev. 9 dated 1 June 2011).
 	 * Use zeroed "index" variable as the dummy.
 	 */

 	index = 0;
 	lpc32xx_eth_send(dev, &index, 4);

 	return 0;
 }

 static int lpc32xx_eth_halt(struct eth_device *dev)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;

 	/* Reset all MAC logic */
 	writel(MAC1_RESETS, &regs->mac1);
 	writel(COMMAND_RESETS, &regs->command);
 	/* Let reset condition settle */
 	udelay(2000);

 	return 0;
 }

 #if defined(CONFIG_PHYLIB)
 int lpc32xx_eth_phylib_init(struct eth_device *dev, int phyid)
 {
 	struct lpc32xx_eth_device *lpc32xx_eth_device =
 		container_of(dev, struct lpc32xx_eth_device, dev);
 	struct mii_dev *bus;
 	struct phy_device *phydev;
 	int ret;

 	bus = mdio_alloc();
 	if (!bus) {
 		printf("mdio_alloc failed\n");
 		return -ENOMEM;
 	}
 	bus->read = mii_reg_read;
 	bus->write = mii_reg_write;
 	strcpy(bus->name, dev->name);

 	ret = mdio_register(bus);
 	if (ret) {
 		printf("mdio_register failed\n");
 		free(bus);
 		return -ENOMEM;
 	}

 	if (lpc32xx_eth_device->phy_rmii)
 		phydev = phy_connect(bus, phyid, dev, PHY_INTERFACE_MODE_RMII);
 	else
 		phydev = phy_connect(bus, phyid, dev, PHY_INTERFACE_MODE_MII);

 	if (!phydev) {
 		printf("phy_connect failed\n");
 		return -ENODEV;
 	}

 	phy_config(phydev);
 	phy_startup(phydev);

 	return 0;
 }
 #endif

 int lpc32xx_eth_initialize(bd_t *bis)
 {
 	struct eth_device *dev = &lpc32xx_eth.dev;
 	struct lpc32xx_eth_registers *regs = lpc32xx_eth.regs;

 	/*
 	 * Set RMII management clock rate. With HCLK at 104 MHz and
 	 * a divider of 28, this will be 3.72 MHz.
 	 */
 	writel(MCFG_RESET_MII_MGMT, &regs->mcfg);
 	writel(MCFG_CLOCK_SELECT_DIV28, &regs->mcfg);

 	/* Reset all MAC logic */
 	writel(MAC1_RESETS, &regs->mac1);
 	writel(COMMAND_RESETS, &regs->command);

 	/* wait 10 ms for the whole I/F to reset */
 	udelay(10000);

 	/* must be less than sizeof(dev->name) */
 	strcpy(dev->name, "eth0");

 	dev->init = (void *)lpc32xx_eth_init;
 	dev->halt = (void *)lpc32xx_eth_halt;
 	dev->send = (void *)lpc32xx_eth_send;
 	dev->recv = (void *)lpc32xx_eth_recv;
 	dev->write_hwaddr = (void *)lpc32xx_eth_write_hwaddr;

 	/* Release SOFT reset to let MII talk to PHY */
 	clrbits_le32(&regs->mac1, MAC1_SOFT_RESET);

 	/* register driver before talking to phy */
 	eth_register(dev);

 #if defined(CONFIG_PHYLIB)
 	lpc32xx_eth_phylib_init(dev, CONFIG_PHY_ADDR);
 #elif 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 = mii_reg_read;
 	mdiodev->write = mii_reg_write;

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

 	return 0;
 }
	/*
	* LPC32xx Ethernet MAC interface driver
	*
	* (C) Copyright 2014 DENX Software Engineering GmbH
	* Written-by: Albert ARIBAUD - 3ADEV <albert.aribaud@3adev.fr>
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/

	#include <common.h>
	#include <net.h>
	#include <malloc.h>
	#include <miiphy.h>
	#include <asm/io.h>
	#include <linux/errno.h>
	#include <asm/types.h>
	#include <asm/system.h>
	#include <asm/byteorder.h>
	#include <asm/arch/cpu.h>
	#include <asm/arch/config.h>

	/*
	* Notes:
	*
	* 1. Unless specified otherwise, all references to tables or paragraphs
	* are to UM10326, "LPC32x0 and LPC32x0/01 User manual".
	*
	* 2. Only bitfield masks/values which are actually used by the driver
	* are defined.
	*/

	/* a single RX descriptor. The controller has an array of these */
	struct lpc32xx_eth_rxdesc {
	u32 packet; /* Receive packet pointer */
	u32 control; /* Descriptor command status */
	};

	#define LPC32XX_ETH_RX_DESC_SIZE (sizeof(struct lpc32xx_eth_rxdesc))

	/* RX control bitfields/masks (see Table 330) */
	#define LPC32XX_ETH_RX_CTRL_SIZE_MASK 0x000007FF
	#define LPC32XX_ETH_RX_CTRL_UNUSED 0x7FFFF800
	#define LPC32XX_ETH_RX_CTRL_INTERRUPT 0x80000000

	/* a single RX status. The controller has an array of these */
	struct lpc32xx_eth_rxstat {
	u32 statusinfo; /* Transmit Descriptor status */
	u32 statushashcrc; /* Transmit Descriptor CRCs */
	};

	#define LPC32XX_ETH_RX_STAT_SIZE (sizeof(struct lpc32xx_eth_rxstat))

	/* RX statusinfo bitfields/masks (see Table 333) */
	#define RX_STAT_RXSIZE 0x000007FF
	/* Helper: OR of all errors except RANGE */
	#define RX_STAT_ERRORS 0x1B800000

	/* a single TX descriptor. The controller has an array of these */
	struct lpc32xx_eth_txdesc {
	u32 packet; /* Transmit packet pointer */
	u32 control; /* Descriptor control */
	};

	#define LPC32XX_ETH_TX_DESC_SIZE (sizeof(struct lpc32xx_eth_txdesc))

	/* TX control bitfields/masks (see Table 335) */
	#define TX_CTRL_TXSIZE 0x000007FF
	#define TX_CTRL_LAST 0x40000000

	/* a single TX status. The controller has an array of these */
	struct lpc32xx_eth_txstat {
	u32 statusinfo; /* Transmit Descriptor status */
	};

	#define LPC32XX_ETH_TX_STAT_SIZE (sizeof(struct lpc32xx_eth_txstat))

	/* Ethernet MAC interface registers (see Table 283) */
	struct lpc32xx_eth_registers {
	/* MAC registers - 0x3106_0000 to 0x3106_01FC */
	u32 mac1; /* MAC configuration register 1 */
	u32 mac2; /* MAC configuration register 2 */
	u32 ipgt; /* Back-to-back Inter-Packet Gap reg. */
	u32 ipgr; /* Non-back-to-back IPG register */
	u32 clrt; /* Collision Window / Retry register */
	u32 maxf; /* Maximum Frame register */
	u32 supp; /* Phy Support register */
	u32 test;
	u32 mcfg; /* MII management configuration reg. */
	u32 mcmd; /* MII management command register */
	u32 madr; /* MII management address register */
	u32 mwtd; /* MII management wite data register */
	u32 mrdd; /* MII management read data register */
	u32 mind; /* MII management indicators register */
	u32 reserved1[2];
	u32 sa0; /* Station address register 0 */
	u32 sa1; /* Station address register 1 */
	u32 sa2; /* Station address register 2 */
	u32 reserved2[45];
	/* Control registers */
	u32 command;
	u32 status;
	u32 rxdescriptor;
	u32 rxstatus;
	u32 rxdescriptornumber; /* actually, number MINUS ONE */
	u32 rxproduceindex; /* head of rx desc fifo */
	u32 rxconsumeindex; /* tail of rx desc fifo */
	u32 txdescriptor;
	u32 txstatus;
	u32 txdescriptornumber; /* actually, number MINUS ONE */
	u32 txproduceindex; /* head of rx desc fifo */
	u32 txconsumeindex; /* tail of rx desc fifo */
	u32 reserved3[10];
	u32 tsv0; /* Transmit status vector register 0 */
	u32 tsv1; /* Transmit status vector register 1 */
	u32 rsv; /* Receive status vector register */
	u32 reserved4[3];
	u32 flowcontrolcounter;
	u32 flowcontrolstatus;
	u32 reserved5[34];
	/* RX filter registers - 0x3106_0200 to 0x3106_0FDC */
	u32 rxfilterctrl;
	u32 rxfilterwolstatus;
	u32 rxfilterwolclear;
	u32 reserved6;
	u32 hashfilterl;
	u32 hashfilterh;
	u32 reserved7[882];
	/* Module control registers - 0x3106_0FE0 to 0x3106_0FF8 */
	u32 intstatus; /* Interrupt status register */
	u32 intenable;
	u32 intclear;
	u32 intset;
	u32 reserved8;
	u32 powerdown;
	u32 reserved9;
	};

	/* MAC1 register bitfields/masks and offsets (see Table 283) */
	#define MAC1_RECV_ENABLE 0x00000001
	#define MAC1_PASS_ALL_RX_FRAMES 0x00000002
	#define MAC1_SOFT_RESET 0x00008000
	/* Helper: general reset */
	#define MAC1_RESETS 0x0000CF00

	/* MAC2 register bitfields/masks and offsets (see Table 284) */
	#define MAC2_FULL_DUPLEX 0x00000001
	#define MAC2_CRC_ENABLE 0x00000010
	#define MAC2_PAD_CRC_ENABLE 0x00000020

	/* SUPP register bitfields/masks and offsets (see Table 290) */
	#define SUPP_SPEED 0x00000100

	/* MCFG register bitfields/masks and offsets (see Table 292) */
	#define MCFG_RESET_MII_MGMT 0x00008000
	/* divide clock by 28 (see Table 293) */
	#define MCFG_CLOCK_SELECT_DIV28 0x0000001C

	/* MADR register bitfields/masks and offsets (see Table 295) */
	#define MADR_REG_MASK 0x0000001F
	#define MADR_PHY_MASK 0x00001F00
	#define MADR_REG_OFFSET 0
	#define MADR_PHY_OFFSET 8

	/* MIND register bitfields/masks (see Table 298) */
	#define MIND_BUSY 0x00000001

	/* COMMAND register bitfields/masks and offsets (see Table 283) */
	#define COMMAND_RXENABLE 0x00000001
	#define COMMAND_TXENABLE 0x00000002
	#define COMMAND_PASSRUNTFRAME 0x00000040
	#define COMMAND_RMII 0x00000200
	#define COMMAND_FULL_DUPLEX 0x00000400
	/* Helper: general reset */
	#define COMMAND_RESETS 0x00000038

	/* STATUS register bitfields/masks and offsets (see Table 283) */
	#define STATUS_RXSTATUS 0x00000001
	#define STATUS_TXSTATUS 0x00000002

	/* RXFILTERCTRL register bitfields/masks (see Table 319) */
	#define RXFILTERCTRL_ACCEPTBROADCAST 0x00000002
	#define RXFILTERCTRL_ACCEPTPERFECT 0x00000020

	/* Buffers and descriptors */

	#define ATTRS(n) __aligned(n)

	#define TX_BUF_COUNT 4
	#define RX_BUF_COUNT 4

	struct lpc32xx_eth_buffers {
	ATTRS(4) struct lpc32xx_eth_txdesc tx_desc[TX_BUF_COUNT];
	ATTRS(4) struct lpc32xx_eth_txstat tx_stat[TX_BUF_COUNT];
	ATTRS(PKTALIGN) u8 tx_buf[TX_BUF_COUNT*PKTSIZE_ALIGN];
	ATTRS(4) struct lpc32xx_eth_rxdesc rx_desc[RX_BUF_COUNT];
	ATTRS(8) struct lpc32xx_eth_rxstat rx_stat[RX_BUF_COUNT];
	ATTRS(PKTALIGN) u8 rx_buf[RX_BUF_COUNT*PKTSIZE_ALIGN];
	};

	/* port device data struct */
	struct lpc32xx_eth_device {
	struct eth_device dev;
	struct lpc32xx_eth_registers *regs;
	struct lpc32xx_eth_buffers *bufs;
	bool phy_rmii;
	};

	#define LPC32XX_ETH_DEVICE_SIZE (sizeof(struct lpc32xx_eth_device))

	/* generic macros */
	#define to_lpc32xx_eth(_d) container_of(_d, struct lpc32xx_eth_device, dev)

	/* timeout for MII polling */
	#define MII_TIMEOUT 10000000

	/* limits for PHY and register addresses */
	#define MII_MAX_REG (MADR_REG_MASK >> MADR_REG_OFFSET)

	#define MII_MAX_PHY (MADR_PHY_MASK >> MADR_PHY_OFFSET)

	#if defined(CONFIG_PHYLIB) \|\| defined(CONFIG_MII) \|\| defined(CONFIG_CMD_MII)
	/*
	* mii_reg_read - miiphy_read callback function.
	*
	* Returns 16bit phy register value, or 0xffff on error
	*/
	static int mii_reg_read(struct mii_dev *bus, int phy_adr, int devad,
	int reg_ofs)
	{
	u16 data = 0;
	struct eth_device *dev = eth_get_dev_by_name(bus->name);
	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
	u32 mind_reg;
	u32 timeout;

	/* check parameters */
	if (phy_adr > MII_MAX_PHY) {
	printf("%s:%u: Invalid PHY address %d\n",
	__func__, __LINE__, phy_adr);
	return -EFAULT;
	}
	if (reg_ofs > MII_MAX_REG) {
	printf("%s:%u: Invalid register offset %d\n",
	__func__, __LINE__, reg_ofs);
	return -EFAULT;
	}

	/* write the phy and reg addressse into the MII address reg */
	writel((phy_adr << MADR_PHY_OFFSET) \| (reg_ofs << MADR_REG_OFFSET),
	&regs->madr);

	/* write 1 to the MII command register to cause a read */
	writel(1, &regs->mcmd);

	/* wait till the MII is not busy */
	timeout = MII_TIMEOUT;
	do {
	/* read MII indicators register */
	mind_reg = readl(&regs->mind);
	if (--timeout == 0)
	break;
	} while (mind_reg & MIND_BUSY);

	/* write 0 to the MII command register to finish the read */
	writel(0, &regs->mcmd);

	if (timeout == 0) {
	printf("%s:%u: MII busy timeout\n", __func__, __LINE__);
	return -EFAULT;
	}

	data = (u16) readl(&regs->mrdd);

	debug("%s:(adr %d, off %d) => %04x\n", __func__, phy_adr,
	reg_ofs, data);

	return data;
	}

	/*
	* mii_reg_write - imiiphy_write callback function.
	*
	* Returns 0 if write succeed, -EINVAL on bad parameters
	* -ETIME on timeout
	*/
	static int mii_reg_write(struct mii_dev *bus, int phy_adr, int devad,
	int reg_ofs, u16 data)
	{
	struct eth_device *dev = eth_get_dev_by_name(bus->name);
	struct lpc32xx_eth_device *dlpc32xx_eth = to_lpc32xx_eth(dev);
	struct lpc32xx_eth_registers *regs = dlpc32xx_eth->regs;
	u32 mind_reg;
	u32 timeout;

	/* check parameters */
	if (phy_adr > MII_MAX_PHY) {
	printf("%s:%u: Invalid PHY address %d\n",
	__func__, __LINE__, phy_adr);
	return -EFAULT;
	}
	if (reg_ofs > MII_MAX_REG) {
	printf("%s:%u: Invalid register offset %d\n",
	__func__, __LINE__, reg_ofs);
	return -EFAULT;
	}

	/* write the phy and reg addressse into the MII address reg */
	writel((phy_adr << MADR_PHY_OFFSET) \| (reg_ofs << MADR_REG_OFFSET),
	&regs->madr);

	/* write data to the MII write register */
	writel(data, &regs->mwtd);

	/* wait till the MII is not busy */
	timeout = MII_TIMEOUT;
	do {
	/* read MII indicators register */
	mind_reg = readl(&regs->mind);
	if (--timeout == 0)
	break;
	} while (mind_reg & MIND_BUSY);

	if (timeout == 0) {
	printf("%s:%u: MII busy timeout\n", __func__,
	__LINE__);
	return -EFAULT;
	}

	/*debug("%s:(adr %d, off %d) <= %04x\n", __func__, phy_adr,
	reg_ofs, data);*/

	return 0;
	}
	#endif

	/*
	* Provide default Ethernet buffers base address if target did not.
	* Locate buffers in SRAM at 0x00001000 to avoid cache issues and
	* maximize throughput.
	*/
	#if !defined(CONFIG_LPC32XX_ETH_BUFS_BASE)
	#define CONFIG_LPC32XX_ETH_BUFS_BASE 0x00001000
	#endif

	static struct lpc32xx_eth_device lpc32xx_eth = {
	.regs = (struct lpc32xx_eth_registers *)LPC32XX_ETH_BASE,
	.bufs = (struct lpc32xx_eth_buffers *)CONFIG_LPC32XX_ETH_BUFS_BASE,
	#if defined(CONFIG_RMII)
	.phy_rmii = true,
	#endif
	};

	#define TX_TIMEOUT 10000

	static int lpc32xx_eth_send(struct eth_device dev, void dataptr, int datasize)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
	int timeout, tx_index;

	/* time out if transmit descriptor array remains full too long */
	timeout = TX_TIMEOUT;
	while ((readl(&regs->status) & STATUS_TXSTATUS) &&
	(readl(&regs->txconsumeindex)
	== readl(&regs->txproduceindex))) {
	if (timeout-- == 0)
	return -1;
	}

	/* determine next transmit packet index to use */
	tx_index = readl(&regs->txproduceindex);

	/* set up transmit packet */
	writel((u32)dataptr, &bufs->tx_desc[tx_index].packet);
	writel(TX_CTRL_LAST \| ((datasize - 1) & TX_CTRL_TXSIZE),
	&bufs->tx_desc[tx_index].control);
	writel(0, &bufs->tx_stat[tx_index].statusinfo);

	/* pass transmit packet to DMA engine */
	tx_index = (tx_index + 1) % TX_BUF_COUNT;
	writel(tx_index, &regs->txproduceindex);

	/* transmission succeeded */
	return 0;
	}

	#define RX_TIMEOUT 1000000

	static int lpc32xx_eth_recv(struct eth_device *dev)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
	int timeout, rx_index;

	/* time out if receive descriptor array remains empty too long */
	timeout = RX_TIMEOUT;
	while (readl(&regs->rxproduceindex) == readl(&regs->rxconsumeindex)) {
	if (timeout-- == 0)
	return -1;
	}

	/* determine next receive packet index to use */
	rx_index = readl(&regs->rxconsumeindex);

	/* if data was valid, pass it on */
	if (!(bufs->rx_stat[rx_index].statusinfo & RX_STAT_ERRORS)) {
	net_process_received_packet(
	&(bufs->rx_buf[rx_index * PKTSIZE_ALIGN]),
	(bufs->rx_stat[rx_index].statusinfo
	& RX_STAT_RXSIZE) + 1);
	}

	/* pass receive slot back to DMA engine */
	rx_index = (rx_index + 1) % RX_BUF_COUNT;
	writel(rx_index, &regs->rxconsumeindex);

	/* reception successful */
	return 0;
	}

	static int lpc32xx_eth_write_hwaddr(struct eth_device *dev)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;

	/* Save station address */
	writel((unsigned long) (dev->enetaddr[0] \|
	(dev->enetaddr[1] << 8)), &regs->sa2);
	writel((unsigned long) (dev->enetaddr[2] \|
	(dev->enetaddr[3] << 8)), &regs->sa1);
	writel((unsigned long) (dev->enetaddr[4] \|
	(dev->enetaddr[5] << 8)), &regs->sa0);

	return 0;
	}

	static int lpc32xx_eth_init(struct eth_device *dev)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;
	struct lpc32xx_eth_buffers *bufs = lpc32xx_eth_device->bufs;
	int index;

	/* Initial MAC initialization */
	writel(MAC1_PASS_ALL_RX_FRAMES, &regs->mac1);
	writel(MAC2_PAD_CRC_ENABLE \| MAC2_CRC_ENABLE, &regs->mac2);
	writel(PKTSIZE_ALIGN, &regs->maxf);

	/* Retries: 15 (0xF). Collision window: 57 (0x37). */
	writel(0x370F, &regs->clrt);

	/* Set IP gap pt 2 to default 0x12 but pt 1 to non-default 0 */
	writel(0x0012, &regs->ipgr);

	/* pass runt (smaller than 64 bytes) frames */
	if (lpc32xx_eth_device->phy_rmii)
	writel(COMMAND_PASSRUNTFRAME \| COMMAND_RMII, &regs->command);
	else
	writel(COMMAND_PASSRUNTFRAME, &regs->command);

	/* Configure Full/Half Duplex mode */
	if (miiphy_duplex(dev->name, CONFIG_PHY_ADDR) == FULL) {
	setbits_le32(&regs->mac2, MAC2_FULL_DUPLEX);
	setbits_le32(&regs->command, COMMAND_FULL_DUPLEX);
	writel(0x15, &regs->ipgt);
	} else {
	writel(0x12, &regs->ipgt);
	}

	/* Configure 100MBit/10MBit mode */
	if (miiphy_speed(dev->name, CONFIG_PHY_ADDR) == _100BASET)
	writel(SUPP_SPEED, &regs->supp);
	else
	writel(0, &regs->supp);

	/* Save station address */
	writel((unsigned long) (dev->enetaddr[0] \|
	(dev->enetaddr[1] << 8)), &regs->sa2);
	writel((unsigned long) (dev->enetaddr[2] \|
	(dev->enetaddr[3] << 8)), &regs->sa1);
	writel((unsigned long) (dev->enetaddr[4] \|
	(dev->enetaddr[5] << 8)), &regs->sa0);

	/* set up transmit buffers */
	for (index = 0; index < TX_BUF_COUNT; index++) {
	bufs->tx_desc[index].control = 0;
	bufs->tx_stat[index].statusinfo = 0;
	}
	writel((u32)(&bufs->tx_desc), (u32 *)&regs->txdescriptor);
	writel((u32)(&bufs->tx_stat), &regs->txstatus);
	writel(TX_BUF_COUNT-1, &regs->txdescriptornumber);

	/* set up receive buffers */
	for (index = 0; index < RX_BUF_COUNT; index++) {
	bufs->rx_desc[index].packet =
	(u32) (bufs->rx_buf+index*PKTSIZE_ALIGN);
	bufs->rx_desc[index].control = PKTSIZE_ALIGN - 1;
	bufs->rx_stat[index].statusinfo = 0;
	bufs->rx_stat[index].statushashcrc = 0;
	}
	writel((u32)(&bufs->rx_desc), &regs->rxdescriptor);
	writel((u32)(&bufs->rx_stat), &regs->rxstatus);
	writel(RX_BUF_COUNT-1, &regs->rxdescriptornumber);

	/* Enable broadcast and matching address packets */
	writel(RXFILTERCTRL_ACCEPTBROADCAST \|
	RXFILTERCTRL_ACCEPTPERFECT, &regs->rxfilterctrl);

	/* Clear and disable interrupts */
	writel(0xFFFF, &regs->intclear);
	writel(0, &regs->intenable);

	/* Enable receive and transmit mode of MAC ethernet core */
	setbits_le32(&regs->command, COMMAND_RXENABLE \| COMMAND_TXENABLE);
	setbits_le32(&regs->mac1, MAC1_RECV_ENABLE);

	/*
	* Perform a 'dummy' first send to work around Ethernet.1
	* erratum (see ES_LPC3250 rev. 9 dated 1 June 2011).
	* Use zeroed "index" variable as the dummy.
	*/

	index = 0;
	lpc32xx_eth_send(dev, &index, 4);

	return 0;
	}

	static int lpc32xx_eth_halt(struct eth_device *dev)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct lpc32xx_eth_registers *regs = lpc32xx_eth_device->regs;

	/* Reset all MAC logic */
	writel(MAC1_RESETS, &regs->mac1);
	writel(COMMAND_RESETS, &regs->command);
	/* Let reset condition settle */
	udelay(2000);

	return 0;
	}

	#if defined(CONFIG_PHYLIB)
	int lpc32xx_eth_phylib_init(struct eth_device *dev, int phyid)
	{
	struct lpc32xx_eth_device *lpc32xx_eth_device =
	container_of(dev, struct lpc32xx_eth_device, dev);
	struct mii_dev *bus;
	struct phy_device *phydev;
	int ret;

	bus = mdio_alloc();
	if (!bus) {
	printf("mdio_alloc failed\n");
	return -ENOMEM;
	}
	bus->read = mii_reg_read;
	bus->write = mii_reg_write;
	strcpy(bus->name, dev->name);

	ret = mdio_register(bus);
	if (ret) {
	printf("mdio_register failed\n");
	free(bus);
	return -ENOMEM;
	}

	if (lpc32xx_eth_device->phy_rmii)
	phydev = phy_connect(bus, phyid, dev, PHY_INTERFACE_MODE_RMII);
	else
	phydev = phy_connect(bus, phyid, dev, PHY_INTERFACE_MODE_MII);

	if (!phydev) {
	printf("phy_connect failed\n");
	return -ENODEV;
	}

	phy_config(phydev);
	phy_startup(phydev);

	return 0;
	}
	#endif

	int lpc32xx_eth_initialize(bd_t *bis)
	{
	struct eth_device *dev = &lpc32xx_eth.dev;
	struct lpc32xx_eth_registers *regs = lpc32xx_eth.regs;

	/*
	* Set RMII management clock rate. With HCLK at 104 MHz and
	* a divider of 28, this will be 3.72 MHz.
	*/
	writel(MCFG_RESET_MII_MGMT, &regs->mcfg);
	writel(MCFG_CLOCK_SELECT_DIV28, &regs->mcfg);

	/* Reset all MAC logic */
	writel(MAC1_RESETS, &regs->mac1);
	writel(COMMAND_RESETS, &regs->command);

	/* wait 10 ms for the whole I/F to reset */
	udelay(10000);

	/* must be less than sizeof(dev->name) */
	strcpy(dev->name, "eth0");

	dev->init = (void *)lpc32xx_eth_init;
	dev->halt = (void *)lpc32xx_eth_halt;
	dev->send = (void *)lpc32xx_eth_send;
	dev->recv = (void *)lpc32xx_eth_recv;
	dev->write_hwaddr = (void *)lpc32xx_eth_write_hwaddr;

	/* Release SOFT reset to let MII talk to PHY */
	clrbits_le32(&regs->mac1, MAC1_SOFT_RESET);

	/* register driver before talking to phy */
	eth_register(dev);

	#if defined(CONFIG_PHYLIB)
	lpc32xx_eth_phylib_init(dev, CONFIG_PHY_ADDR);
	#elif 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 = mii_reg_read;
	mdiodev->write = mii_reg_write;

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

	return 0;
	}