Merge commit '87ddedd'

1 files changed, 948 insertions, 0 deletions

diff --git a/drivers/net/eepro100.c b/drivers/net/eepro100.c
new file mode 100644
index 000000000..738146e66
--- /dev/null
+++ b/drivers/net/eepro100.c
@@ -0,0 +1,948 @@
+/*
+ * (C) Copyright 2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <asm/io.h>
+#include <pci.h>
+#include <miiphy.h>
+
+#undef DEBUG
+
+#if defined(CONFIG_CMD_NET) \
+	&& defined(CONFIG_NET_MULTI) && defined(CONFIG_EEPRO100)
+
+	/* Ethernet chip registers.
+	 */
+#define SCBStatus		0	/* Rx/Command Unit Status *Word* */
+#define SCBIntAckByte		1	/* Rx/Command Unit STAT/ACK byte */
+#define SCBCmd			2	/* Rx/Command Unit Command *Word* */
+#define SCBIntrCtlByte		3	/* Rx/Command Unit Intr.Control Byte */
+#define SCBPointer		4	/* General purpose pointer. */
+#define SCBPort			8	/* Misc. commands and operands. */
+#define SCBflash		12	/* Flash memory control. */
+#define SCBeeprom		14	/* EEPROM memory control. */
+#define SCBCtrlMDI		16	/* MDI interface control. */
+#define SCBEarlyRx		20	/* Early receive byte count. */
+#define SCBGenControl		28	/* 82559 General Control Register */
+#define SCBGenStatus		29	/* 82559 General Status register */
+
+	/* 82559 SCB status word defnitions
+	 */
+#define SCB_STATUS_CX		0x8000	/* CU finished command (transmit) */
+#define SCB_STATUS_FR		0x4000	/* frame received */
+#define SCB_STATUS_CNA		0x2000	/* CU left active state */
+#define SCB_STATUS_RNR		0x1000	/* receiver left ready state */
+#define SCB_STATUS_MDI		0x0800	/* MDI read/write cycle done */
+#define SCB_STATUS_SWI		0x0400	/* software generated interrupt */
+#define SCB_STATUS_FCP		0x0100	/* flow control pause interrupt */
+
+#define SCB_INTACK_MASK		0xFD00	/* all the above */
+
+#define SCB_INTACK_TX		(SCB_STATUS_CX | SCB_STATUS_CNA)
+#define SCB_INTACK_RX		(SCB_STATUS_FR | SCB_STATUS_RNR)
+
+	/* System control block commands
+	 */
+/* CU Commands */
+#define CU_NOP			0x0000
+#define CU_START		0x0010
+#define CU_RESUME		0x0020
+#define CU_STATSADDR		0x0040	/* Load Dump Statistics ctrs addr */
+#define CU_SHOWSTATS		0x0050	/* Dump statistics counters. */
+#define CU_ADDR_LOAD		0x0060	/* Base address to add to CU commands */
+#define CU_DUMPSTATS		0x0070	/* Dump then reset stats counters. */
+
+/* RUC Commands */
+#define RUC_NOP			0x0000
+#define RUC_START		0x0001
+#define RUC_RESUME		0x0002
+#define RUC_ABORT		0x0004
+#define RUC_ADDR_LOAD		0x0006	/* (seems not to clear on acceptance) */
+#define RUC_RESUMENR		0x0007
+
+#define CU_CMD_MASK		0x00f0
+#define RU_CMD_MASK		0x0007
+
+#define SCB_M			0x0100	/* 0 = enable interrupt, 1 = disable */
+#define SCB_SWI			0x0200	/* 1 - cause device to interrupt */
+
+#define CU_STATUS_MASK		0x00C0
+#define RU_STATUS_MASK		0x003C
+
+#define RU_STATUS_IDLE		(0<<2)
+#define RU_STATUS_SUS		(1<<2)
+#define RU_STATUS_NORES		(2<<2)
+#define RU_STATUS_READY		(4<<2)
+#define RU_STATUS_NO_RBDS_SUS	((1<<2)|(8<<2))
+#define RU_STATUS_NO_RBDS_NORES ((2<<2)|(8<<2))
+#define RU_STATUS_NO_RBDS_READY ((4<<2)|(8<<2))
+
+	/* 82559 Port interface commands.
+	 */
+#define I82559_RESET		0x00000000	/* Software reset */
+#define I82559_SELFTEST		0x00000001	/* 82559 Selftest command */
+#define I82559_SELECTIVE_RESET	0x00000002
+#define I82559_DUMP		0x00000003
+#define I82559_DUMP_WAKEUP	0x00000007
+
+	/* 82559 Eeprom interface.
+	 */
+#define EE_SHIFT_CLK		0x01	/* EEPROM shift clock. */
+#define EE_CS			0x02	/* EEPROM chip select. */
+#define EE_DATA_WRITE		0x04	/* EEPROM chip data in. */
+#define EE_WRITE_0		0x01
+#define EE_WRITE_1		0x05
+#define EE_DATA_READ		0x08	/* EEPROM chip data out. */
+#define EE_ENB			(0x4800 | EE_CS)
+#define EE_CMD_BITS		3
+#define EE_DATA_BITS		16
+
+	/* The EEPROM commands include the alway-set leading bit.
+	 */
+#define EE_EWENB_CMD		(4 << addr_len)
+#define EE_WRITE_CMD		(5 << addr_len)
+#define EE_READ_CMD		(6 << addr_len)
+#define EE_ERASE_CMD		(7 << addr_len)
+
+	/* Receive frame descriptors.
+	 */
+struct RxFD {
+	volatile u16 status;
+	volatile u16 control;
+	volatile u32 link;		/* struct RxFD * */
+	volatile u32 rx_buf_addr;	/* void * */
+	volatile u32 count;
+
+	volatile u8 data[PKTSIZE_ALIGN];
+};
+
+#define RFD_STATUS_C		0x8000	/* completion of received frame */
+#define RFD_STATUS_OK		0x2000	/* frame received with no errors */
+
+#define RFD_CONTROL_EL		0x8000	/* 1=last RFD in RFA */
+#define RFD_CONTROL_S		0x4000	/* 1=suspend RU after receiving frame */
+#define RFD_CONTROL_H		0x0010	/* 1=RFD is a header RFD */
+#define RFD_CONTROL_SF		0x0008	/* 0=simplified, 1=flexible mode */
+
+#define RFD_COUNT_MASK		0x3fff
+#define RFD_COUNT_F		0x4000
+#define RFD_COUNT_EOF		0x8000
+
+#define RFD_RX_CRC		0x0800	/* crc error */
+#define RFD_RX_ALIGNMENT	0x0400	/* alignment error */
+#define RFD_RX_RESOURCE		0x0200	/* out of space, no resources */
+#define RFD_RX_DMA_OVER		0x0100	/* DMA overrun */
+#define RFD_RX_SHORT		0x0080	/* short frame error */
+#define RFD_RX_LENGTH		0x0020
+#define RFD_RX_ERROR		0x0010	/* receive error */
+#define RFD_RX_NO_ADR_MATCH	0x0004	/* no address match */
+#define RFD_RX_IA_MATCH		0x0002	/* individual address does not match */
+#define RFD_RX_TCO		0x0001	/* TCO indication */
+
+	/* Transmit frame descriptors
+	 */
+struct TxFD {				/* Transmit frame descriptor set. */
+	volatile u16 status;
+	volatile u16 command;
+	volatile u32 link;		/* void * */
+	volatile u32 tx_desc_addr;	/* Always points to the tx_buf_addr element. */
+	volatile s32 count;
+
+	volatile u32 tx_buf_addr0;	/* void *, frame to be transmitted.  */
+	volatile s32 tx_buf_size0;	/* Length of Tx frame. */
+	volatile u32 tx_buf_addr1;	/* void *, frame to be transmitted.  */
+	volatile s32 tx_buf_size1;	/* Length of Tx frame. */
+};
+
+#define TxCB_CMD_TRANSMIT	0x0004	/* transmit command */
+#define TxCB_CMD_SF		0x0008	/* 0=simplified, 1=flexible mode */
+#define TxCB_CMD_NC		0x0010	/* 0=CRC insert by controller */
+#define TxCB_CMD_I		0x2000	/* generate interrupt on completion */
+#define TxCB_CMD_S		0x4000	/* suspend on completion */
+#define TxCB_CMD_EL		0x8000	/* last command block in CBL */
+
+#define TxCB_COUNT_MASK		0x3fff
+#define TxCB_COUNT_EOF		0x8000
+
+	/* The Speedo3 Rx and Tx frame/buffer descriptors.
+	 */
+struct descriptor {			/* A generic descriptor. */
+	volatile u16 status;
+	volatile u16 command;
+	volatile u32 link;		/* struct descriptor *	*/
+
+	unsigned char params[0];
+};
+
+#define CFG_CMD_EL		0x8000
+#define CFG_CMD_SUSPEND		0x4000
+#define CFG_CMD_INT		0x2000
+#define CFG_CMD_IAS		0x0001	/* individual address setup */
+#define CFG_CMD_CONFIGURE	0x0002	/* configure */
+
+#define CFG_STATUS_C		0x8000
+#define CFG_STATUS_OK		0x2000
+
+	/* Misc.
+	 */
+#define NUM_RX_DESC		PKTBUFSRX
+#define NUM_TX_DESC		1	/* Number of TX descriptors   */
+
+#define TOUT_LOOP		1000000
+
+#define ETH_ALEN		6
+
+static struct RxFD rx_ring[NUM_RX_DESC];	/* RX descriptor ring	      */
+static struct TxFD tx_ring[NUM_TX_DESC];	/* TX descriptor ring	      */
+static int rx_next;			/* RX descriptor ring pointer */
+static int tx_next;			/* TX descriptor ring pointer */
+static int tx_threshold;
+
+/*
+ * The parameters for a CmdConfigure operation.
+ * There are so many options that it would be difficult to document
+ * each bit. We mostly use the default or recommended settings.
+ */
+static const char i82557_config_cmd[] = {
+	22, 0x08, 0, 0, 0, 0, 0x32, 0x03, 1,	/* 1=Use MII  0=Use AUI */
+	0, 0x2E, 0, 0x60, 0,
+	0xf2, 0x48, 0, 0x40, 0xf2, 0x80,	/* 0x40=Force full-duplex */
+	0x3f, 0x05,
+};
+static const char i82558_config_cmd[] = {
+	22, 0x08, 0, 1, 0, 0, 0x22, 0x03, 1,	/* 1=Use MII  0=Use AUI */
+	0, 0x2E, 0, 0x60, 0x08, 0x88,
+	0x68, 0, 0x40, 0xf2, 0x84,		/* Disable FC */
+	0x31, 0x05,
+};
+
+static void init_rx_ring (struct eth_device *dev);
+static void purge_tx_ring (struct eth_device *dev);
+
+static void read_hw_addr (struct eth_device *dev, bd_t * bis);
+
+static int eepro100_init (struct eth_device *dev, bd_t * bis);
+static int eepro100_send (struct eth_device *dev, volatile void *packet,
+						  int length);
+static int eepro100_recv (struct eth_device *dev);
+static void eepro100_halt (struct eth_device *dev);
+
+#if defined(CONFIG_E500) || defined(CONFIG_DB64360) || defined(CONFIG_DB64460)
+#define bus_to_phys(a) (a)
+#define phys_to_bus(a) (a)
+#else
+#define bus_to_phys(a)	pci_mem_to_phys((pci_dev_t)dev->priv, a)
+#define phys_to_bus(a)	pci_phys_to_mem((pci_dev_t)dev->priv, a)
+#endif
+
+static inline int INW (struct eth_device *dev, u_long addr)
+{
+	return le16_to_cpu (*(volatile u16 *) (addr + dev->iobase));
+}
+
+static inline void OUTW (struct eth_device *dev, int command, u_long addr)
+{
+	*(volatile u16 *) ((addr + dev->iobase)) = cpu_to_le16 (command);
+}
+
+static inline void OUTL (struct eth_device *dev, int command, u_long addr)
+{
+	*(volatile u32 *) ((addr + dev->iobase)) = cpu_to_le32 (command);
+}
+
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
+static inline int INL (struct eth_device *dev, u_long addr)
+{
+	return le32_to_cpu (*(volatile u32 *) (addr + dev->iobase));
+}
+
+static int get_phyreg (struct eth_device *dev, unsigned char addr,
+		unsigned char reg, unsigned short *value)
+{
+	int cmd;
+	int timeout = 50;
+
+	/* read requested data */
+	cmd = (2 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16);
+	OUTL (dev, cmd, SCBCtrlMDI);
+
+	do {
+		udelay(1000);
+		cmd = INL (dev, SCBCtrlMDI);
+	} while (!(cmd & (1 << 28)) && (--timeout));
+
+	if (timeout == 0)
+		return -1;
+
+	*value = (unsigned short) (cmd & 0xffff);
+
+	return 0;
+}
+
+static int set_phyreg (struct eth_device *dev, unsigned char addr,
+		unsigned char reg, unsigned short value)
+{
+	int cmd;
+	int timeout = 50;
+
+	/* write requested data */
+	cmd = (1 << 26) | ((addr & 0x1f) << 21) | ((reg & 0x1f) << 16);
+	OUTL (dev, cmd | value, SCBCtrlMDI);
+
+	while (!(INL (dev, SCBCtrlMDI) & (1 << 28)) && (--timeout))
+		udelay(1000);
+
+	if (timeout == 0)
+		return -1;
+
+	return 0;
+}
+
+/* Check if given phyaddr is valid, i.e. there is a PHY connected.
+ * Do this by checking model value field from ID2 register.
+ */
+static struct eth_device* verify_phyaddr (char *devname, unsigned char addr)
+{
+	struct eth_device *dev;
+	unsigned short value;
+	unsigned char model;
+
+	dev = eth_get_dev_by_name(devname);
+	if (dev == NULL) {
+		printf("%s: no such device\n", devname);
+		return NULL;
+	}
+
+	/* read id2 register */
+	if (get_phyreg(dev, addr, PHY_PHYIDR2, &value) != 0) {
+		printf("%s: mii read timeout!\n", devname);
+		return NULL;
+	}
+
+	/* get model */
+	model = (unsigned char)((value >> 4) & 0x003f);
+
+	if (model == 0) {
+		printf("%s: no PHY at address %d\n", devname, addr);
+		return NULL;
+	}
+
+	return dev;
+}
+
+static int eepro100_miiphy_read (char *devname, unsigned char addr,
+		unsigned char reg, unsigned short *value)
+{
+	struct eth_device *dev;
+
+	dev = verify_phyaddr(devname, addr);
+	if (dev == NULL)
+		return -1;
+
+	if (get_phyreg(dev, addr, reg, value) != 0) {
+		printf("%s: mii read timeout!\n", devname);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int eepro100_miiphy_write (char *devname, unsigned char addr,
+		unsigned char reg, unsigned short value)
+{
+	struct eth_device *dev;
+
+	dev = verify_phyaddr(devname, addr);
+	if (dev == NULL)
+		return -1;
+
+	if (set_phyreg(dev, addr, reg, value) != 0) {
+		printf("%s: mii write timeout!\n", devname);
+		return -1;
+	}
+
+	return 0;
+}
+
+#endif
+
+/* Wait for the chip get the command.
+*/
+static int wait_for_eepro100 (struct eth_device *dev)
+{
+	int i;
+
+	for (i = 0; INW (dev, SCBCmd) & (CU_CMD_MASK | RU_CMD_MASK); i++) {
+		if (i >= TOUT_LOOP) {
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+static struct pci_device_id supported[] = {
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82557},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559},
+	{PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82559ER},
+	{}
+};
+
+int eepro100_initialize (bd_t * bis)
+{
+	pci_dev_t devno;
+	int card_number = 0;
+	struct eth_device *dev;
+	u32 iobase, status;
+	int idx = 0;
+
+	while (1) {
+		/* Find PCI device
+		 */
+		if ((devno = pci_find_devices (supported, idx++)) < 0) {
+			break;
+		}
+
+		pci_read_config_dword (devno, PCI_BASE_ADDRESS_0, &iobase);
+		iobase &= ~0xf;
+
+#ifdef DEBUG
+		printf ("eepro100: Intel i82559 PCI EtherExpressPro @0x%x\n",
+				iobase);
+#endif
+
+		pci_write_config_dword (devno,
+					PCI_COMMAND,
+					PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER);
+
+		/* Check if I/O accesses and Bus Mastering are enabled.
+		 */
+		pci_read_config_dword (devno, PCI_COMMAND, &status);
+		if (!(status & PCI_COMMAND_MEMORY)) {
+			printf ("Error: Can not enable MEM access.\n");
+			continue;
+		}
+
+		if (!(status & PCI_COMMAND_MASTER)) {
+			printf ("Error: Can not enable Bus Mastering.\n");
+			continue;
+		}
+
+		dev = (struct eth_device *) malloc (sizeof *dev);
+
+		sprintf (dev->name, "i82559#%d", card_number);
+		dev->priv = (void *) devno; /* this have to come before bus_to_phys() */
+		dev->iobase = bus_to_phys (iobase);
+		dev->init = eepro100_init;
+		dev->halt = eepro100_halt;
+		dev->send = eepro100_send;
+		dev->recv = eepro100_recv;
+
+		eth_register (dev);
+
+#if defined (CONFIG_MII) || defined(CONFIG_CMD_MII)
+		/* register mii command access routines */
+		miiphy_register(dev->name,
+				eepro100_miiphy_read, eepro100_miiphy_write);
+#endif
+
+		card_number++;
+
+		/* Set the latency timer for value.
+		 */
+		pci_write_config_byte (devno, PCI_LATENCY_TIMER, 0x20);
+
+		udelay (10 * 1000);
+
+		read_hw_addr (dev, bis);
+	}
+
+	return card_number;
+}
+
+
+static int eepro100_init (struct eth_device *dev, bd_t * bis)
+{
+	int i, status = 0;
+	int tx_cur;
+	struct descriptor *ias_cmd, *cfg_cmd;
+
+	/* Reset the ethernet controller
+	 */
+	OUTL (dev, I82559_SELECTIVE_RESET, SCBPort);
+	udelay (20);
+
+	OUTL (dev, I82559_RESET, SCBPort);
+	udelay (20);
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+	OUTL (dev, 0, SCBPointer);
+	OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd);
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+	OUTL (dev, 0, SCBPointer);
+	OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd);
+
+	/* Initialize Rx and Tx rings.
+	 */
+	init_rx_ring (dev);
+	purge_tx_ring (dev);
+
+	/* Tell the adapter where the RX ring is located.
+	 */
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+
+	OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer);
+	OUTW (dev, SCB_M | RUC_START, SCBCmd);
+
+	/* Send the Configure frame */
+	tx_cur = tx_next;
+	tx_next = ((tx_next + 1) % NUM_TX_DESC);
+
+	cfg_cmd = (struct descriptor *) &tx_ring[tx_cur];
+	cfg_cmd->command = cpu_to_le16 ((CFG_CMD_SUSPEND | CFG_CMD_CONFIGURE));
+	cfg_cmd->status = 0;
+	cfg_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next]));
+
+	memcpy (cfg_cmd->params, i82558_config_cmd,
+			sizeof (i82558_config_cmd));
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error---CFG_CMD_CONFIGURE: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+
+	OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer);
+	OUTW (dev, SCB_M | CU_START, SCBCmd);
+
+	for (i = 0;
+	     !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C);
+	     i++) {
+		if (i >= TOUT_LOOP) {
+			printf ("%s: Tx error buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) {
+		printf ("TX error status = 0x%08X\n",
+			le16_to_cpu (tx_ring[tx_cur].status));
+		goto Done;
+	}
+
+	/* Send the Individual Address Setup frame
+	 */
+	tx_cur = tx_next;
+	tx_next = ((tx_next + 1) % NUM_TX_DESC);
+
+	ias_cmd = (struct descriptor *) &tx_ring[tx_cur];
+	ias_cmd->command = cpu_to_le16 ((CFG_CMD_SUSPEND | CFG_CMD_IAS));
+	ias_cmd->status = 0;
+	ias_cmd->link = cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next]));
+
+	memcpy (ias_cmd->params, dev->enetaddr, 6);
+
+	/* Tell the adapter where the TX ring is located.
+	 */
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+
+	OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer);
+	OUTW (dev, SCB_M | CU_START, SCBCmd);
+
+	for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C);
+		 i++) {
+		if (i >= TOUT_LOOP) {
+			printf ("%s: Tx error buffer not ready\n",
+				dev->name);
+			goto Done;
+		}
+	}
+
+	if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) {
+		printf ("TX error status = 0x%08X\n",
+			le16_to_cpu (tx_ring[tx_cur].status));
+		goto Done;
+	}
+
+	status = 1;
+
+  Done:
+	return status;
+}
+
+static int eepro100_send (struct eth_device *dev, volatile void *packet, int length)
+{
+	int i, status = -1;
+	int tx_cur;
+
+	if (length <= 0) {
+		printf ("%s: bad packet size: %d\n", dev->name, length);
+		goto Done;
+	}
+
+	tx_cur = tx_next;
+	tx_next = (tx_next + 1) % NUM_TX_DESC;
+
+	tx_ring[tx_cur].command = cpu_to_le16 ( TxCB_CMD_TRANSMIT |
+						TxCB_CMD_SF	|
+						TxCB_CMD_S	|
+						TxCB_CMD_EL );
+	tx_ring[tx_cur].status = 0;
+	tx_ring[tx_cur].count = cpu_to_le32 (tx_threshold);
+	tx_ring[tx_cur].link =
+		cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_next]));
+	tx_ring[tx_cur].tx_desc_addr =
+		cpu_to_le32 (phys_to_bus ((u32) & tx_ring[tx_cur].tx_buf_addr0));
+	tx_ring[tx_cur].tx_buf_addr0 =
+		cpu_to_le32 (phys_to_bus ((u_long) packet));
+	tx_ring[tx_cur].tx_buf_size0 = cpu_to_le32 (length);
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("%s: Tx error ethernet controller not ready.\n",
+				dev->name);
+		goto Done;
+	}
+
+	/* Send the packet.
+	 */
+	OUTL (dev, phys_to_bus ((u32) & tx_ring[tx_cur]), SCBPointer);
+	OUTW (dev, SCB_M | CU_START, SCBCmd);
+
+	for (i = 0; !(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_C);
+		 i++) {
+		if (i >= TOUT_LOOP) {
+			printf ("%s: Tx error buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	if (!(le16_to_cpu (tx_ring[tx_cur].status) & CFG_STATUS_OK)) {
+		printf ("TX error status = 0x%08X\n",
+			le16_to_cpu (tx_ring[tx_cur].status));
+		goto Done;
+	}
+
+	status = length;
+
+  Done:
+	return status;
+}
+
+static int eepro100_recv (struct eth_device *dev)
+{
+	u16 status, stat;
+	int rx_prev, length = 0;
+
+	stat = INW (dev, SCBStatus);
+	OUTW (dev, stat & SCB_STATUS_RNR, SCBStatus);
+
+	for (;;) {
+		status = le16_to_cpu (rx_ring[rx_next].status);
+
+		if (!(status & RFD_STATUS_C)) {
+			break;
+		}
+
+		/* Valid frame status.
+		 */
+		if ((status & RFD_STATUS_OK)) {
+			/* A valid frame received.
+			 */
+			length = le32_to_cpu (rx_ring[rx_next].count) & 0x3fff;
+
+			/* Pass the packet up to the protocol
+			 * layers.
+			 */
+			NetReceive (rx_ring[rx_next].data, length);
+		} else {
+			/* There was an error.
+			 */
+			printf ("RX error status = 0x%08X\n", status);
+		}
+
+		rx_ring[rx_next].control = cpu_to_le16 (RFD_CONTROL_S);
+		rx_ring[rx_next].status = 0;
+		rx_ring[rx_next].count = cpu_to_le32 (PKTSIZE_ALIGN << 16);
+
+		rx_prev = (rx_next + NUM_RX_DESC - 1) % NUM_RX_DESC;
+		rx_ring[rx_prev].control = 0;
+
+		/* Update entry information.
+		 */
+		rx_next = (rx_next + 1) % NUM_RX_DESC;
+	}
+
+	if (stat & SCB_STATUS_RNR) {
+
+		printf ("%s: Receiver is not ready, restart it !\n", dev->name);
+
+		/* Reinitialize Rx ring.
+		 */
+		init_rx_ring (dev);
+
+		if (!wait_for_eepro100 (dev)) {
+			printf ("Error: Can not restart ethernet controller.\n");
+			goto Done;
+		}
+
+		OUTL (dev, phys_to_bus ((u32) & rx_ring[rx_next]), SCBPointer);
+		OUTW (dev, SCB_M | RUC_START, SCBCmd);
+	}
+
+  Done:
+	return length;
+}
+
+static void eepro100_halt (struct eth_device *dev)
+{
+	/* Reset the ethernet controller
+	 */
+	OUTL (dev, I82559_SELECTIVE_RESET, SCBPort);
+	udelay (20);
+
+	OUTL (dev, I82559_RESET, SCBPort);
+	udelay (20);
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+	OUTL (dev, 0, SCBPointer);
+	OUTW (dev, SCB_M | RUC_ADDR_LOAD, SCBCmd);
+
+	if (!wait_for_eepro100 (dev)) {
+		printf ("Error: Can not reset ethernet controller.\n");
+		goto Done;
+	}
+	OUTL (dev, 0, SCBPointer);
+	OUTW (dev, SCB_M | CU_ADDR_LOAD, SCBCmd);
+
+  Done:
+	return;
+}
+
+	/* SROM Read.
+	 */
+static int read_eeprom (struct eth_device *dev, int location, int addr_len)
+{
+	unsigned short retval = 0;
+	int read_cmd = location | EE_READ_CMD;
+	int i;
+
+	OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom);
+	OUTW (dev, EE_ENB, SCBeeprom);
+
+	/* Shift the read command bits out. */
+	for (i = 12; i >= 0; i--) {
+		short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+
+		OUTW (dev, EE_ENB | dataval, SCBeeprom);
+		udelay (1);
+		OUTW (dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom);
+		udelay (1);
+	}
+	OUTW (dev, EE_ENB, SCBeeprom);
+
+	for (i = 15; i >= 0; i--) {
+		OUTW (dev, EE_ENB | EE_SHIFT_CLK, SCBeeprom);
+		udelay (1);
+		retval = (retval << 1) |
+				((INW (dev, SCBeeprom) & EE_DATA_READ) ? 1 : 0);
+		OUTW (dev, EE_ENB, SCBeeprom);
+		udelay (1);
+	}
+
+	/* Terminate the EEPROM access. */
+	OUTW (dev, EE_ENB & ~EE_CS, SCBeeprom);
+	return retval;
+}
+
+#ifdef CONFIG_EEPRO100_SROM_WRITE
+int eepro100_write_eeprom (struct eth_device* dev, int location, int addr_len, unsigned short data)
+{
+    unsigned short dataval;
+    int enable_cmd = 0x3f | EE_EWENB_CMD;
+    int write_cmd  = location | EE_WRITE_CMD;
+    int i;
+    unsigned long datalong, tmplong;
+
+    OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom);
+    udelay(1);
+    OUTW(dev, EE_ENB, SCBeeprom);
+
+    /* Shift the enable command bits out. */
+    for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--)
+    {
+	dataval = (enable_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+	OUTW(dev, EE_ENB | dataval, SCBeeprom);
+	udelay(1);
+	OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom);
+	udelay(1);
+    }
+
+    OUTW(dev, EE_ENB, SCBeeprom);
+    udelay(1);
+    OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom);
+    udelay(1);
+    OUTW(dev, EE_ENB, SCBeeprom);
+
+
+    /* Shift the write command bits out. */
+    for (i = (addr_len+EE_CMD_BITS-1); i >= 0; i--)
+    {
+	dataval = (write_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+	OUTW(dev, EE_ENB | dataval, SCBeeprom);
+	udelay(1);
+	OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom);
+	udelay(1);
+    }
+
+    /* Write the data */
+    datalong= (unsigned long) ((((data) & 0x00ff) << 8) | ( (data) >> 8));
+
+    for (i = 0; i< EE_DATA_BITS; i++)
+    {
+    /* Extract and move data bit to bit DI */
+    dataval = ((datalong & 0x8000)>>13) ? EE_DATA_WRITE : 0;
+
+    OUTW(dev, EE_ENB | dataval, SCBeeprom);
+    udelay(1);
+    OUTW(dev, EE_ENB | dataval | EE_SHIFT_CLK, SCBeeprom);
+    udelay(1);
+    OUTW(dev, EE_ENB | dataval, SCBeeprom);
+    udelay(1);
+
+    datalong = datalong << 1;	/* Adjust significant data bit*/
+    }
+
+    /* Finish up command  (toggle CS) */
+    OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom);
+    udelay(1);			/* delay for more than 250 ns */
+    OUTW(dev, EE_ENB, SCBeeprom);
+
+    /* Wait for programming ready (D0 = 1) */
+    tmplong = 10;
+    do
+    {
+	dataval = INW(dev, SCBeeprom);
+	if (dataval & EE_DATA_READ)
+	    break;
+	udelay(10000);
+    }
+    while (-- tmplong);
+
+    if (tmplong == 0)
+    {
+	printf ("Write i82559 eeprom timed out (100 ms waiting for data ready.\n");
+	return -1;
+    }
+
+    /* Terminate the EEPROM access. */
+    OUTW(dev, EE_ENB & ~EE_CS, SCBeeprom);
+
+    return 0;
+}
+#endif
+
+static void init_rx_ring (struct eth_device *dev)
+{
+	int i;
+
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		rx_ring[i].status = 0;
+		rx_ring[i].control =
+				(i == NUM_RX_DESC - 1) ? cpu_to_le16 (RFD_CONTROL_S) : 0;
+		rx_ring[i].link =
+				cpu_to_le32 (phys_to_bus
+							 ((u32) & rx_ring[(i + 1) % NUM_RX_DESC]));
+		rx_ring[i].rx_buf_addr = 0xffffffff;
+		rx_ring[i].count = cpu_to_le32 (PKTSIZE_ALIGN << 16);
+	}
+
+	rx_next = 0;
+}
+
+static void purge_tx_ring (struct eth_device *dev)
+{
+	int i;
+
+	tx_next = 0;
+	tx_threshold = 0x01208000;
+
+	for (i = 0; i < NUM_TX_DESC; i++) {
+		tx_ring[i].status = 0;
+		tx_ring[i].command = 0;
+		tx_ring[i].link = 0;
+		tx_ring[i].tx_desc_addr = 0;
+		tx_ring[i].count = 0;
+
+		tx_ring[i].tx_buf_addr0 = 0;
+		tx_ring[i].tx_buf_size0 = 0;
+		tx_ring[i].tx_buf_addr1 = 0;
+		tx_ring[i].tx_buf_size1 = 0;
+	}
+}
+
+static void read_hw_addr (struct eth_device *dev, bd_t * bis)
+{
+	u16 eeprom[0x40];
+	u16 sum = 0;
+	int i, j;
+	int addr_len = read_eeprom (dev, 0, 6) == 0xffff ? 8 : 6;
+
+	for (j = 0, i = 0; i < 0x40; i++) {
+		u16 value = read_eeprom (dev, i, addr_len);
+
+		eeprom[i] = value;
+		sum += value;
+		if (i < 3) {
+			dev->enetaddr[j++] = value;
+			dev->enetaddr[j++] = value >> 8;
+		}
+	}
+
+	if (sum != 0xBABA) {
+		memset (dev->enetaddr, 0, ETH_ALEN);
+#ifdef DEBUG
+		printf ("%s: Invalid EEPROM checksum %#4.4x, "
+			"check settings before activating this device!\n",
+			dev->name, sum);
+#endif
+	}
+}
+
+#endif