drivers/net : move net drivers to drivers/net

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 771 insertions, 0 deletions

diff --git a/drivers/net/dc2114x.c b/drivers/net/dc2114x.c
new file mode 100644
index 0000000..d5275dc
--- /dev/null
+++ b/drivers/net/dc2114x.c
@@ -0,0 +1,771 @@
+/*
+ * 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>
+
+#if defined(CONFIG_CMD_NET) \
+	&& defined(CONFIG_NET_MULTI) && defined(CONFIG_TULIP)
+
+#include <malloc.h>
+#include <net.h>
+#include <pci.h>
+
+#undef DEBUG_SROM
+#undef DEBUG_SROM2
+
+#undef UPDATE_SROM
+
+/* PCI Registers.
+ */
+#define PCI_CFDA_PSM		0x43
+
+#define CFRV_RN		0x000000f0	/* Revision Number */
+
+#define WAKEUP		0x00		/* Power Saving Wakeup */
+#define SLEEP		0x80		/* Power Saving Sleep Mode */
+
+#define DC2114x_BRK	0x0020		/* CFRV break between DC21142 & DC21143 */
+
+/* Ethernet chip registers.
+ */
+#define DE4X5_BMR	0x000		/* Bus Mode Register */
+#define DE4X5_TPD	0x008		/* Transmit Poll Demand Reg */
+#define DE4X5_RRBA	0x018		/* RX Ring Base Address Reg */
+#define DE4X5_TRBA	0x020		/* TX Ring Base Address Reg */
+#define DE4X5_STS	0x028		/* Status Register */
+#define DE4X5_OMR	0x030		/* Operation Mode Register */
+#define DE4X5_SICR	0x068		/* SIA Connectivity Register */
+#define DE4X5_APROM	0x048		/* Ethernet Address PROM */
+
+/* Register bits.
+ */
+#define BMR_SWR		0x00000001	/* Software Reset */
+#define STS_TS		0x00700000	/* Transmit Process State */
+#define STS_RS		0x000e0000	/* Receive Process State */
+#define OMR_ST		0x00002000	/* Start/Stop Transmission Command */
+#define OMR_SR		0x00000002	/* Start/Stop Receive */
+#define OMR_PS		0x00040000	/* Port Select */
+#define OMR_SDP		0x02000000	/* SD Polarity - MUST BE ASSERTED */
+#define OMR_PM		0x00000080	/* Pass All Multicast */
+
+/* Descriptor bits.
+ */
+#define R_OWN		0x80000000	/* Own Bit */
+#define RD_RER		0x02000000	/* Receive End Of Ring */
+#define RD_LS		0x00000100	/* Last Descriptor */
+#define RD_ES		0x00008000	/* Error Summary */
+#define TD_TER		0x02000000	/* Transmit End Of Ring */
+#define T_OWN		0x80000000	/* Own Bit */
+#define TD_LS		0x40000000	/* Last Segment */
+#define TD_FS		0x20000000	/* First Segment */
+#define TD_ES		0x00008000	/* Error Summary */
+#define TD_SET		0x08000000	/* Setup Packet */
+
+/* The EEPROM commands include the alway-set leading bit. */
+#define SROM_WRITE_CMD	5
+#define SROM_READ_CMD	6
+#define SROM_ERASE_CMD	7
+
+#define SROM_HWADD	    0x0014	/* Hardware Address offset in SROM */
+#define SROM_RD		0x00004000	/* Read from Boot ROM */
+#define EE_DATA_WRITE	      0x04	/* EEPROM chip data in. */
+#define EE_WRITE_0	    0x4801
+#define EE_WRITE_1	    0x4805
+#define EE_DATA_READ	      0x08	/* EEPROM chip data out. */
+#define SROM_SR		0x00000800	/* Select Serial ROM when set */
+
+#define DT_IN		0x00000004	/* Serial Data In */
+#define DT_CLK		0x00000002	/* Serial ROM Clock */
+#define DT_CS		0x00000001	/* Serial ROM Chip Select */
+
+#define POLL_DEMAND	1
+
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+#define RESET_DM9102(dev) {\
+    unsigned long i;\
+    i=INL(dev, 0x0);\
+    udelay(1000);\
+    OUTL(dev, i | BMR_SWR, DE4X5_BMR);\
+    udelay(1000);\
+}
+#else
+#define RESET_DE4X5(dev) {\
+    int i;\
+    i=INL(dev, DE4X5_BMR);\
+    udelay(1000);\
+    OUTL(dev, i | BMR_SWR, DE4X5_BMR);\
+    udelay(1000);\
+    OUTL(dev, i, DE4X5_BMR);\
+    udelay(1000);\
+    for (i=0;i<5;i++) {INL(dev, DE4X5_BMR); udelay(10000);}\
+    udelay(1000);\
+}
+#endif
+
+#define START_DE4X5(dev) {\
+    s32 omr; \
+    omr = INL(dev, DE4X5_OMR);\
+    omr |= OMR_ST | OMR_SR;\
+    OUTL(dev, omr, DE4X5_OMR);		/* Enable the TX and/or RX */\
+}
+
+#define STOP_DE4X5(dev) {\
+    s32 omr; \
+    omr = INL(dev, DE4X5_OMR);\
+    omr &= ~(OMR_ST|OMR_SR);\
+    OUTL(dev, omr, DE4X5_OMR);		/* Disable the TX and/or RX */ \
+}
+
+#define NUM_RX_DESC PKTBUFSRX
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+	#define NUM_TX_DESC 1			/* Number of TX descriptors   */
+#else
+	#define NUM_TX_DESC 4
+#endif
+#define RX_BUFF_SZ  PKTSIZE_ALIGN
+
+#define TOUT_LOOP   1000000
+
+#define SETUP_FRAME_LEN 192
+#define ETH_ALEN	6
+
+struct de4x5_desc {
+	volatile s32 status;
+	u32 des1;
+	u32 buf;
+	u32 next;
+};
+
+static struct de4x5_desc rx_ring[NUM_RX_DESC] __attribute__ ((aligned(32))); /* RX descriptor ring         */
+static struct de4x5_desc tx_ring[NUM_TX_DESC] __attribute__ ((aligned(32))); /* TX descriptor ring         */
+static int rx_new;                             /* RX descriptor ring pointer */
+static int tx_new;                             /* TX descriptor ring pointer */
+
+static char rxRingSize;
+static char txRingSize;
+
+#if defined(UPDATE_SROM) || !defined(CONFIG_TULIP_FIX_DAVICOM)
+static void  sendto_srom(struct eth_device* dev, u_int command, u_long addr);
+static int   getfrom_srom(struct eth_device* dev, u_long addr);
+static int   do_eeprom_cmd(struct eth_device *dev, u_long ioaddr,int cmd,int cmd_len);
+static int   do_read_eeprom(struct eth_device *dev,u_long ioaddr,int location,int addr_len);
+#endif	/* UPDATE_SROM || !CONFIG_TULIP_FIX_DAVICOM */
+#ifdef UPDATE_SROM
+static int   write_srom(struct eth_device *dev, u_long ioaddr, int index, int new_value);
+static void  update_srom(struct eth_device *dev, bd_t *bis);
+#endif
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+static int   read_srom(struct eth_device *dev, u_long ioaddr, int index);
+static void  read_hw_addr(struct eth_device* dev, bd_t * bis);
+#endif	/* CONFIG_TULIP_FIX_DAVICOM */
+static void  send_setup_frame(struct eth_device* dev, bd_t * bis);
+
+static int   dc21x4x_init(struct eth_device* dev, bd_t* bis);
+static int   dc21x4x_send(struct eth_device* dev, volatile void *packet, int length);
+static int   dc21x4x_recv(struct eth_device* dev);
+static void  dc21x4x_halt(struct eth_device* dev);
+#ifdef CONFIG_TULIP_SELECT_MEDIA
+extern void  dc21x4x_select_media(struct eth_device* dev);
+#endif
+
+#if defined(CONFIG_E500)
+#define phys_to_bus(a) (a)
+#else
+#define phys_to_bus(a)	pci_phys_to_mem((pci_dev_t)dev->priv, a)
+#endif
+
+static int INL(struct eth_device* dev, u_long addr)
+{
+	return le32_to_cpu(*(volatile u_long *)(addr + dev->iobase));
+}
+
+static void OUTL(struct eth_device* dev, int command, u_long addr)
+{
+	*(volatile u_long *)(addr + dev->iobase) = cpu_to_le32(command);
+}
+
+static struct pci_device_id supported[] = {
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST },
+	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_21142 },
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+	{ PCI_VENDOR_ID_DAVICOM, PCI_DEVICE_ID_DAVICOM_DM9102A },
+#endif
+	{ }
+};
+
+int dc21x4x_initialize(bd_t *bis)
+{
+	int             	idx=0;
+	int             	card_number = 0;
+	unsigned int           	cfrv;
+	unsigned char   	timer;
+	pci_dev_t		devbusfn;
+	unsigned int		iobase;
+	unsigned short		status;
+	struct eth_device* 	dev;
+
+	while(1) {
+		devbusfn =  pci_find_devices(supported, idx++);
+		if (devbusfn == -1) {
+			break;
+		}
+
+		/* Get the chip configuration revision register. */
+		pci_read_config_dword(devbusfn, PCI_REVISION_ID, &cfrv);
+
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+		if ((cfrv & CFRV_RN) < DC2114x_BRK ) {
+			printf("Error: The chip is not DC21143.\n");
+			continue;
+		}
+#endif
+
+		pci_read_config_word(devbusfn, PCI_COMMAND, &status);
+		status |=
+#ifdef CONFIG_TULIP_USE_IO
+		  PCI_COMMAND_IO |
+#else
+		  PCI_COMMAND_MEMORY |
+#endif
+		  PCI_COMMAND_MASTER;
+		pci_write_config_word(devbusfn, PCI_COMMAND, status);
+
+		pci_read_config_word(devbusfn, PCI_COMMAND, &status);
+		if (!(status & PCI_COMMAND_IO)) {
+			printf("Error: Can not enable I/O access.\n");
+			continue;
+		}
+
+		if (!(status & PCI_COMMAND_IO)) {
+			printf("Error: Can not enable I/O access.\n");
+			continue;
+		}
+
+		if (!(status & PCI_COMMAND_MASTER)) {
+			printf("Error: Can not enable Bus Mastering.\n");
+			continue;
+		}
+
+		/* Check the latency timer for values >= 0x60. */
+		pci_read_config_byte(devbusfn, PCI_LATENCY_TIMER, &timer);
+
+		if (timer < 0x60) {
+			pci_write_config_byte(devbusfn, PCI_LATENCY_TIMER, 0x60);
+		}
+
+#ifdef CONFIG_TULIP_USE_IO
+		/* read BAR for memory space access */
+		pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_0, &iobase);
+		iobase &= PCI_BASE_ADDRESS_IO_MASK;
+#else
+		/* read BAR for memory space access */
+		pci_read_config_dword(devbusfn, PCI_BASE_ADDRESS_1, &iobase);
+		iobase &= PCI_BASE_ADDRESS_MEM_MASK;
+#endif
+		debug ("dc21x4x: DEC 21142 PCI Device @0x%x\n", iobase);
+
+		dev = (struct eth_device*) malloc(sizeof *dev);
+
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+		sprintf(dev->name, "Davicom#%d", card_number);
+#else
+		sprintf(dev->name, "dc21x4x#%d", card_number);
+#endif
+
+#ifdef CONFIG_TULIP_USE_IO
+		dev->iobase = pci_io_to_phys(devbusfn, iobase);
+#else
+		dev->iobase = pci_mem_to_phys(devbusfn, iobase);
+#endif
+		dev->priv   = (void*) devbusfn;
+		dev->init   = dc21x4x_init;
+		dev->halt   = dc21x4x_halt;
+		dev->send   = dc21x4x_send;
+		dev->recv   = dc21x4x_recv;
+
+		/* Ensure we're not sleeping. */
+		pci_write_config_byte(devbusfn, PCI_CFDA_PSM, WAKEUP);
+
+		udelay(10 * 1000);
+
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+		read_hw_addr(dev, bis);
+#endif
+		eth_register(dev);
+
+		card_number++;
+	}
+
+	return card_number;
+}
+
+static int dc21x4x_init(struct eth_device* dev, bd_t* bis)
+{
+	int		i;
+	int		devbusfn = (int) dev->priv;
+
+	/* Ensure we're not sleeping. */
+	pci_write_config_byte(devbusfn, PCI_CFDA_PSM, WAKEUP);
+
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+	RESET_DM9102(dev);
+#else
+	RESET_DE4X5(dev);
+#endif
+
+	if ((INL(dev, DE4X5_STS) & (STS_TS | STS_RS)) != 0) {
+		printf("Error: Cannot reset ethernet controller.\n");
+		return 0;
+	}
+
+#ifdef CONFIG_TULIP_SELECT_MEDIA
+	dc21x4x_select_media(dev);
+#else
+	OUTL(dev, OMR_SDP | OMR_PS | OMR_PM, DE4X5_OMR);
+#endif
+
+	for (i = 0; i < NUM_RX_DESC; i++) {
+		rx_ring[i].status = cpu_to_le32(R_OWN);
+		rx_ring[i].des1 = cpu_to_le32(RX_BUFF_SZ);
+		rx_ring[i].buf = cpu_to_le32(phys_to_bus((u32) NetRxPackets[i]));
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+		rx_ring[i].next = cpu_to_le32(phys_to_bus((u32) &rx_ring[(i+1) % NUM_RX_DESC]));
+#else
+		rx_ring[i].next = 0;
+#endif
+	}
+
+	for (i=0; i < NUM_TX_DESC; i++) {
+		tx_ring[i].status = 0;
+		tx_ring[i].des1 = 0;
+		tx_ring[i].buf = 0;
+
+#ifdef CONFIG_TULIP_FIX_DAVICOM
+	tx_ring[i].next = cpu_to_le32(phys_to_bus((u32) &tx_ring[(i+1) % NUM_TX_DESC]));
+#else
+		tx_ring[i].next = 0;
+#endif
+	}
+
+	rxRingSize = NUM_RX_DESC;
+	txRingSize = NUM_TX_DESC;
+
+	/* Write the end of list marker to the descriptor lists. */
+	rx_ring[rxRingSize - 1].des1 |= cpu_to_le32(RD_RER);
+	tx_ring[txRingSize - 1].des1 |= cpu_to_le32(TD_TER);
+
+	/* Tell the adapter where the TX/RX rings are located. */
+	OUTL(dev, phys_to_bus((u32) &rx_ring), DE4X5_RRBA);
+	OUTL(dev, phys_to_bus((u32) &tx_ring), DE4X5_TRBA);
+
+	START_DE4X5(dev);
+
+	tx_new = 0;
+	rx_new = 0;
+
+	send_setup_frame(dev, bis);
+
+	return 1;
+}
+
+static int dc21x4x_send(struct eth_device* dev, volatile void *packet, int length)
+{
+	int		status = -1;
+	int		i;
+
+	if (length <= 0) {
+		printf("%s: bad packet size: %d\n", dev->name, length);
+		goto Done;
+	}
+
+	for(i = 0; tx_ring[tx_new].status & cpu_to_le32(T_OWN); i++) {
+		if (i >= TOUT_LOOP) {
+			printf("%s: tx error buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	tx_ring[tx_new].buf    = cpu_to_le32(phys_to_bus((u32) packet));
+	tx_ring[tx_new].des1   = cpu_to_le32(TD_TER | TD_LS | TD_FS | length);
+	tx_ring[tx_new].status = cpu_to_le32(T_OWN);
+
+	OUTL(dev, POLL_DEMAND, DE4X5_TPD);
+
+	for(i = 0; tx_ring[tx_new].status & cpu_to_le32(T_OWN); i++) {
+		if (i >= TOUT_LOOP) {
+			printf(".%s: tx buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	if (le32_to_cpu(tx_ring[tx_new].status) & TD_ES) {
+#if 0 /* test-only */
+		printf("TX error status = 0x%08X\n",
+			le32_to_cpu(tx_ring[tx_new].status));
+#endif
+		tx_ring[tx_new].status = 0x0;
+		goto Done;
+	}
+
+	status = length;
+
+ Done:
+    tx_new = (tx_new+1) % NUM_TX_DESC;
+	return status;
+}
+
+static int dc21x4x_recv(struct eth_device* dev)
+{
+	s32		status;
+	int		length    = 0;
+
+	for ( ; ; ) {
+		status = (s32)le32_to_cpu(rx_ring[rx_new].status);
+
+		if (status & R_OWN) {
+			break;
+		}
+
+		if (status & RD_LS) {
+			/* Valid frame status.
+			 */
+			if (status & RD_ES) {
+
+				/* There was an error.
+				 */
+				printf("RX error status = 0x%08X\n", status);
+			} else {
+				/* A valid frame received.
+				 */
+				length = (le32_to_cpu(rx_ring[rx_new].status) >> 16);
+
+				/* Pass the packet up to the protocol
+				 * layers.
+				 */
+				NetReceive(NetRxPackets[rx_new], length - 4);
+			}
+
+			/* Change buffer ownership for this frame, back
+			 * to the adapter.
+			 */
+			rx_ring[rx_new].status = cpu_to_le32(R_OWN);
+		}
+
+		/* Update entry information.
+		 */
+		rx_new = (rx_new + 1) % rxRingSize;
+	}
+
+	return length;
+}
+
+static void dc21x4x_halt(struct eth_device* dev)
+{
+	int		devbusfn = (int) dev->priv;
+
+	STOP_DE4X5(dev);
+	OUTL(dev, 0, DE4X5_SICR);
+
+	pci_write_config_byte(devbusfn, PCI_CFDA_PSM, SLEEP);
+}
+
+static void send_setup_frame(struct eth_device* dev, bd_t *bis)
+{
+	int		i;
+	char	setup_frame[SETUP_FRAME_LEN];
+	char 	*pa = &setup_frame[0];
+
+	memset(pa, 0xff, SETUP_FRAME_LEN);
+
+	for (i = 0; i < ETH_ALEN; i++) {
+		*(pa + (i & 1)) = dev->enetaddr[i];
+		if (i & 0x01) {
+			pa += 4;
+		}
+	}
+
+	for(i = 0; tx_ring[tx_new].status & cpu_to_le32(T_OWN); i++) {
+		if (i >= TOUT_LOOP) {
+			printf("%s: tx error buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	tx_ring[tx_new].buf = cpu_to_le32(phys_to_bus((u32) &setup_frame[0]));
+	tx_ring[tx_new].des1 = cpu_to_le32(TD_TER | TD_SET| SETUP_FRAME_LEN);
+	tx_ring[tx_new].status = cpu_to_le32(T_OWN);
+
+	OUTL(dev, POLL_DEMAND, DE4X5_TPD);
+
+	for(i = 0; tx_ring[tx_new].status & cpu_to_le32(T_OWN); i++) {
+		if (i >= TOUT_LOOP) {
+			printf("%s: tx buffer not ready\n", dev->name);
+			goto Done;
+		}
+	}
+
+	if (le32_to_cpu(tx_ring[tx_new].status) != 0x7FFFFFFF) {
+		printf("TX error status2 = 0x%08X\n", le32_to_cpu(tx_ring[tx_new].status));
+	}
+	tx_new = (tx_new+1) % NUM_TX_DESC;
+
+Done:
+	return;
+}
+
+#if defined(UPDATE_SROM) || !defined(CONFIG_TULIP_FIX_DAVICOM)
+/* SROM Read and write routines.
+ */
+static void
+sendto_srom(struct eth_device* dev, u_int command, u_long addr)
+{
+	OUTL(dev, command, addr);
+	udelay(1);
+}
+
+static int
+getfrom_srom(struct eth_device* dev, u_long addr)
+{
+	s32 tmp;
+
+	tmp = INL(dev, addr);
+	udelay(1);
+
+	return tmp;
+}
+
+/* Note: this routine returns extra data bits for size detection. */
+static int do_read_eeprom(struct eth_device *dev, u_long ioaddr, int location, int addr_len)
+{
+	int i;
+	unsigned retval = 0;
+	int read_cmd = location | (SROM_READ_CMD << addr_len);
+
+	sendto_srom(dev, SROM_RD | SROM_SR, ioaddr);
+	sendto_srom(dev, SROM_RD | SROM_SR | DT_CS, ioaddr);
+
+#ifdef DEBUG_SROM
+	printf(" EEPROM read at %d ", location);
+#endif
+
+	/* Shift the read command bits out. */
+	for (i = 4 + addr_len; i >= 0; i--) {
+		short dataval = (read_cmd & (1 << i)) ? EE_DATA_WRITE : 0;
+		sendto_srom(dev, SROM_RD | SROM_SR | DT_CS | dataval, ioaddr);
+		udelay(10);
+		sendto_srom(dev, SROM_RD | SROM_SR | DT_CS | dataval | DT_CLK, ioaddr);
+		udelay(10);
+#ifdef DEBUG_SROM2
+		printf("%X", getfrom_srom(dev, ioaddr) & 15);
+#endif
+		retval = (retval << 1) | ((getfrom_srom(dev, ioaddr) & EE_DATA_READ) ? 1 : 0);
+	}
+
+	sendto_srom(dev, SROM_RD | SROM_SR | DT_CS, ioaddr);
+
+#ifdef DEBUG_SROM2
+	printf(" :%X:", getfrom_srom(dev, ioaddr) & 15);
+#endif
+
+	for (i = 16; i > 0; i--) {
+		sendto_srom(dev, SROM_RD | SROM_SR | DT_CS | DT_CLK, ioaddr);
+		udelay(10);
+#ifdef DEBUG_SROM2
+		printf("%X", getfrom_srom(dev, ioaddr) & 15);
+#endif
+		retval = (retval << 1) | ((getfrom_srom(dev, ioaddr) & EE_DATA_READ) ? 1 : 0);
+		sendto_srom(dev, SROM_RD | SROM_SR | DT_CS, ioaddr);
+		udelay(10);
+	}
+
+	/* Terminate the EEPROM access. */
+	sendto_srom(dev, SROM_RD | SROM_SR, ioaddr);
+
+#ifdef DEBUG_SROM2
+	printf(" EEPROM value at %d is %5.5x.\n", location, retval);
+#endif
+
+	return retval;
+}
+#endif	/* UPDATE_SROM || !CONFIG_TULIP_FIX_DAVICOM */
+
+/* This executes a generic EEPROM command, typically a write or write
+ * enable. It returns the data output from the EEPROM, and thus may
+ * also be used for reads.
+ */
+#if defined(UPDATE_SROM) || !defined(CONFIG_TULIP_FIX_DAVICOM)
+static int do_eeprom_cmd(struct eth_device *dev, u_long ioaddr, int cmd, int cmd_len)
+{
+	unsigned retval = 0;
+
+#ifdef DEBUG_SROM
+	printf(" EEPROM op 0x%x: ", cmd);
+#endif
+
+	sendto_srom(dev,SROM_RD | SROM_SR | DT_CS | DT_CLK, ioaddr);
+
+	/* Shift the command bits out. */
+	do {
+		short dataval = (cmd & (1 << cmd_len)) ? EE_WRITE_1 : EE_WRITE_0;
+		sendto_srom(dev,dataval, ioaddr);
+		udelay(10);
+
+#ifdef DEBUG_SROM2
+		printf("%X", getfrom_srom(dev,ioaddr) & 15);
+#endif
+
+		sendto_srom(dev,dataval | DT_CLK, ioaddr);
+		udelay(10);
+		retval = (retval << 1) | ((getfrom_srom(dev,ioaddr) & EE_DATA_READ) ? 1 : 0);
+	} while (--cmd_len >= 0);
+	sendto_srom(dev,SROM_RD | SROM_SR | DT_CS, ioaddr);
+
+	/* Terminate the EEPROM access. */
+	sendto_srom(dev,SROM_RD | SROM_SR, ioaddr);
+
+#ifdef DEBUG_SROM
+	printf(" EEPROM result is 0x%5.5x.\n", retval);
+#endif
+
+	return retval;
+}
+#endif	/* UPDATE_SROM || !CONFIG_TULIP_FIX_DAVICOM */
+
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+static int read_srom(struct eth_device *dev, u_long ioaddr, int index)
+{
+	int ee_addr_size = do_read_eeprom(dev, ioaddr, 0xff, 8) & 0x40000 ? 8 : 6;
+
+	return do_eeprom_cmd(dev, ioaddr,
+			     (((SROM_READ_CMD << ee_addr_size) | index) << 16)
+			     | 0xffff, 3 + ee_addr_size + 16);
+}
+#endif	/* CONFIG_TULIP_FIX_DAVICOM */
+
+#ifdef UPDATE_SROM
+static int write_srom(struct eth_device *dev, u_long ioaddr, int index, int new_value)
+{
+	int ee_addr_size = do_read_eeprom(dev, ioaddr, 0xff, 8) & 0x40000 ? 8 : 6;
+	int i;
+	unsigned short newval;
+
+	udelay(10*1000); /* test-only */
+
+#ifdef DEBUG_SROM
+	printf("ee_addr_size=%d.\n", ee_addr_size);
+	printf("Writing new entry 0x%4.4x to offset %d.\n", new_value, index);
+#endif
+
+	/* Enable programming modes. */
+	do_eeprom_cmd(dev, ioaddr, (0x4f << (ee_addr_size-4)), 3+ee_addr_size);
+
+	/* Do the actual write. */
+	do_eeprom_cmd(dev, ioaddr,
+		      (((SROM_WRITE_CMD<<ee_addr_size)|index) << 16) | new_value,
+		      3 + ee_addr_size + 16);
+
+	/* Poll for write finished. */
+	sendto_srom(dev, SROM_RD | SROM_SR | DT_CS, ioaddr);
+	for (i = 0; i < 10000; i++)			/* Typical 2000 ticks */
+		if (getfrom_srom(dev, ioaddr) & EE_DATA_READ)
+			break;
+
+#ifdef DEBUG_SROM
+	printf(" Write finished after %d ticks.\n", i);
+#endif
+
+	/* Disable programming. */
+	do_eeprom_cmd(dev, ioaddr, (0x40 << (ee_addr_size-4)), 3 + ee_addr_size);
+
+	/* And read the result. */
+	newval = do_eeprom_cmd(dev, ioaddr,
+			       (((SROM_READ_CMD<<ee_addr_size)|index) << 16)
+			       | 0xffff, 3 + ee_addr_size + 16);
+#ifdef DEBUG_SROM
+	printf("  New value at offset %d is %4.4x.\n", index, newval);
+#endif
+	return 1;
+}
+#endif
+
+#ifndef CONFIG_TULIP_FIX_DAVICOM
+static void read_hw_addr(struct eth_device *dev, bd_t *bis)
+{
+	u_short tmp, *p = (u_short *)(&dev->enetaddr[0]);
+	int i, j = 0;
+
+	for (i = 0; i < (ETH_ALEN >> 1); i++) {
+		tmp = read_srom(dev, DE4X5_APROM, ((SROM_HWADD >> 1) + i));
+		*p = le16_to_cpu(tmp);
+		j += *p++;
+	}
+
+	if ((j == 0) || (j == 0x2fffd)) {
+		memset (dev->enetaddr, 0, ETH_ALEN);
+		debug ("Warning: can't read HW address from SROM.\n");
+		goto Done;
+	}
+
+	return;
+
+Done:
+#ifdef UPDATE_SROM
+	update_srom(dev, bis);
+#endif
+	return;
+}
+#endif	/* CONFIG_TULIP_FIX_DAVICOM */
+
+#ifdef UPDATE_SROM
+static void update_srom(struct eth_device *dev, bd_t *bis)
+{
+	int i;
+	static unsigned short eeprom[0x40] = {
+		0x140b, 0x6610, 0x0000, 0x0000, 	/* 00 */
+		0x0000, 0x0000, 0x0000, 0x0000, 	/* 04 */
+		0x00a3, 0x0103, 0x0000, 0x0000,  	/* 08 */
+		0x0000, 0x1f00, 0x0000, 0x0000, 	/* 0c */
+		0x0108, 0x038d, 0x0000, 0x0000,  	/* 10 */
+		0xe078, 0x0001, 0x0040, 0x0018, 	/* 14 */
+		0x0000, 0x0000, 0x0000, 0x0000,  	/* 18 */
+		0x0000, 0x0000, 0x0000, 0x0000, 	/* 1c */
+		0x0000, 0x0000, 0x0000, 0x0000,  	/* 20 */
+		0x0000, 0x0000, 0x0000, 0x0000, 	/* 24 */
+		0x0000, 0x0000, 0x0000, 0x0000,  	/* 28 */
+		0x0000, 0x0000, 0x0000, 0x0000, 	/* 2c */
+		0x0000, 0x0000, 0x0000, 0x0000,  	/* 30 */
+		0x0000, 0x0000, 0x0000, 0x0000, 	/* 34 */
+		0x0000, 0x0000, 0x0000, 0x0000,  	/* 38 */
+		0x0000, 0x0000, 0x0000, 0x4e07,		/* 3c */
+	};
+
+	/* Ethernet Addr... */
+	eeprom[0x0a] = ((bis->bi_enetaddr[1] & 0xff) << 8) | (bis->bi_enetaddr[0] & 0xff);
+	eeprom[0x0b] = ((bis->bi_enetaddr[3] & 0xff) << 8) | (bis->bi_enetaddr[2] & 0xff);
+	eeprom[0x0c] = ((bis->bi_enetaddr[5] & 0xff) << 8) | (bis->bi_enetaddr[4] & 0xff);
+
+	for (i=0; i<0x40; i++)
+	{
+		write_srom(dev, DE4X5_APROM, i, eeprom[i]);
+	}
+}
+#endif	/* UPDATE_SROM */
+
+#endif