Add support for the console over Ethernet (through PCI NE2000).

Signed-off-by: Rudolf Marek <r.marek@assembler.cz>
Acked-by: Cristian Magherusan-Stanciu <cristi.magherusan@gmail.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5666 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

3 files changed, 575 insertions, 0 deletions

diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc
index 76b434c96b..b30da268c3 100644
--- a/src/lib/Makefile.inc
+++ b/src/lib/Makefile.inc
@@ -22,6 +22,9 @@ initobj-y += memcmp.o
 initobj-y += cbfs.o
 initobj-y += lzma.o
 #initobj-y += lzmadecode.o
+initobj-$(CONFIG_CONSOLE_NE2K) += ne2k.o
+initobj-$(CONFIG_CONSOLE_NE2K) += compute_ip_checksum.o
+driver-$(CONFIG_CONSOLE_NE2K) += ne2k.o
 
 obj-$(CONFIG_USBDEBUG) += usbdebug.o
 
diff --git a/src/lib/ne2k.c b/src/lib/ne2k.c
new file mode 100644
index 0000000000..abc97082be
--- /dev/null
+++ b/src/lib/ne2k.c
@@ -0,0 +1,462 @@
+/*
+ETHERBOOT -  BOOTP/TFTP Bootstrap Program
+
+Author: Martin Renters
+  Date: May/94
+
+ This code is based heavily on David Greenman's if_ed.c driver
+
+ Copyright (C) 1993-1994, David Greenman, Martin Renters.
+  This software may be used, modified, copied, distributed, and sold, in
+  both source and binary form provided that the above copyright and these
+  terms are retained. Under no circumstances are the authors responsible for
+  the proper functioning of this software, nor do the authors assume any
+  responsibility for damages incurred with its use.
+
+Multicast support added by Timothy Legge (timlegge@users.sourceforge.net) 09/28/2003
+Relocation support added by Ken Yap (ken_yap@users.sourceforge.net) 28/12/02
+3c503 support added by Bill Paul (wpaul@ctr.columbia.edu) on 11/15/94
+SMC8416 support added by Bill Paul (wpaul@ctr.columbia.edu) on 12/25/94
+3c503 PIO support added by Jim Hague (jim.hague@acm.org) on 2/17/98
+RX overrun by Klaus Espenlaub (espenlaub@informatik.uni-ulm.de) on 3/10/99
+  parts taken from the Linux 8390 driver (by Donald Becker and Paul Gortmaker)
+SMC8416 PIO support added by Andrew Bettison (andrewb@zip.com.au) on 4/3/02
+  based on the Linux 8390 driver (by Donald Becker and Paul Gortmaker)
+
+(C) Rudolf Marek <r.marek@assembler.cz> Simplify for RTL8029, Add coreboot glue logic
+
+*/
+
+#define ETH_ALEN		6	/* Size of Ethernet address */
+#define ETH_HLEN		14	/* Size of ethernet header */
+#define	ETH_ZLEN		60	/* Minimum packet */
+#define	ETH_FRAME_LEN		1514	/* Maximum packet */
+#define ETH_DATA_ALIGN		2	/* Amount needed to align the data after an ethernet header */
+#define	ETH_MAX_MTU		(ETH_FRAME_LEN-ETH_HLEN)
+
+#include "ns8390.h"
+#include <ip_checksum.h>
+#include <console/ne2k.h>
+#include <arch/io.h>
+//#include <arch/romcc_io.h>
+
+#define MEM_SIZE MEM_32768
+#define TX_START 64
+#define RX_START (64 + D8390_TXBUF_SIZE)
+
+static unsigned int get_count(unsigned int eth_nic_base)
+{
+	unsigned int ret;
+	outb(D8390_COMMAND_RD2 + D8390_COMMAND_PS1,
+	     eth_nic_base + D8390_P0_COMMAND);
+
+	ret = inb(eth_nic_base + 8 + 0) | (inb(eth_nic_base + 8 + 1) << 8);
+
+	outb(D8390_COMMAND_RD2 + D8390_COMMAND_PS0,
+	     eth_nic_base + D8390_P0_COMMAND);
+	return ret;
+}
+
+static void set_count(unsigned int eth_nic_base, unsigned int what)
+{
+	outb(D8390_COMMAND_RD2 + D8390_COMMAND_PS1,
+	     eth_nic_base + D8390_P0_COMMAND);
+
+	outb(what & 0xff,eth_nic_base + 8);
+	outb((what >> 8) & 0xff,eth_nic_base + 8 + 1);
+
+	outb(D8390_COMMAND_RD2 + D8390_COMMAND_PS0,
+	     eth_nic_base + D8390_P0_COMMAND);
+}
+
+static void eth_pio_write(unsigned char *src, unsigned int dst, unsigned int cnt,
+				unsigned int eth_nic_base)
+{
+	outb(D8390_COMMAND_RD2 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+	outb(D8390_ISR_RDC, eth_nic_base + D8390_P0_ISR);
+	outb(cnt, eth_nic_base + D8390_P0_RBCR0);
+	outb(cnt >> 8, eth_nic_base + D8390_P0_RBCR1);
+	outb(dst, eth_nic_base + D8390_P0_RSAR0);
+	outb(dst >> 8, eth_nic_base + D8390_P0_RSAR1);
+	outb(D8390_COMMAND_RD1 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+
+	while (cnt--) {
+			outb(*(src++), eth_nic_base + NE_ASIC_OFFSET + NE_DATA);
+	}
+	/*
+	#warning "Add timeout"
+	*/
+	/* wait for operation finish */
+	while ((inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_RDC) != D8390_ISR_RDC)
+		;
+}
+
+void ne2k_append_data(unsigned char *d, int len, unsigned int base)
+{
+	eth_pio_write(d, (TX_START << 8) + 42 + get_count(base), len, base);
+	set_count(base, get_count(base)+len);
+}
+
+#ifdef __ROMCC__
+
+void eth_pio_write_byte(int data, unsigned short dst, unsigned int eth_nic_base)
+{
+	outb(D8390_COMMAND_RD2 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+	outb(D8390_ISR_RDC, eth_nic_base + D8390_P0_ISR);
+	outb(1, eth_nic_base + D8390_P0_RBCR0);
+	outb(0, eth_nic_base + D8390_P0_RBCR1);
+	outb(dst, eth_nic_base + D8390_P0_RSAR0);
+	outb(dst >> 8, eth_nic_base + D8390_P0_RSAR1);
+	outb(D8390_COMMAND_RD1 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+	outb(data, eth_nic_base + NE_ASIC_OFFSET + NE_DATA);
+
+	while ((inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_RDC) != D8390_ISR_RDC)
+		;
+}
+
+void ne2k_append_data_byte(int d, unsigned int base)
+{
+	eth_pio_write_byte(d, (TX_START << 8) + 42 + get_count(base), base);
+	set_count(base, get_count(base)+1);
+}
+
+static unsigned char eth_pio_read_byte(unsigned int src,
+				unsigned int eth_nic_base)
+{
+	outb(D8390_COMMAND_RD2 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+	outb(0, eth_nic_base + D8390_P0_RBCR0);
+	outb(1, eth_nic_base + D8390_P0_RBCR1);
+	outb(src, eth_nic_base + D8390_P0_RSAR0);
+	outb(src >> 8, eth_nic_base + D8390_P0_RSAR1);
+	outb(D8390_COMMAND_RD0 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+	return inb(eth_nic_base + NE_ASIC_OFFSET + NE_DATA);
+}
+
+
+/* varition of compute_ip_checksum which works on SRAM */
+unsigned long compute_ip_checksum_from_sram(unsigned short offset, unsigned short length,
+					unsigned int eth_nic_base)
+{
+	unsigned long sum;
+	unsigned long i;
+	/* In the most straight forward way possible,
+	 * compute an ip style checksum.
+	 */
+	sum = 0;
+	for(i = 0; i < length; i++) {
+		unsigned long v;
+		v = eth_pio_read_byte((TX_START << 8)+i+offset, eth_nic_base);
+		if (i & 1) {
+			v <<= 8;
+		}
+		/* Add the new value */
+		sum += v;
+		/* Wrap around the carry */
+		if (sum > 0xFFFF) {
+			sum = (sum + (sum >> 16)) & 0xFFFF;
+		}
+	}
+	return   (~((sum & 0xff) | (((sum >> 8) & 0xff) << 8) )) & 0xffff;
+}
+
+
+static void str2ip_load(const char *str, unsigned short offset, unsigned int eth_nic_base)
+#else
+static void str2ip(const char *str, unsigned char *ip)
+#endif
+{
+	unsigned char c, i = 0;
+	int acc = 0;
+
+	do {
+		c = str[i];
+		if ((c >= '0') && (c <= '9')) {
+			acc *= 10;
+			acc += (c - '0');
+		} else {
+#ifdef __ROMCC__
+			eth_pio_write_byte(acc, (TX_START << 8)+offset, eth_nic_base);
+			offset++;
+#else
+			*ip++ = acc;
+#endif
+			acc = 0;
+		}
+		i++;
+	} while (c != '\0');
+}
+
+#ifdef __ROMCC__
+static void str2mac_load(const char *str, unsigned short offset, unsigned int eth_nic_base)
+#else
+static void str2mac(const char *str, unsigned char *mac)
+#endif
+{
+	unsigned char c, i = 0;
+	int acc = 0;
+
+	do {
+
+		c = str[i];
+		if ((c >= '0') && (c <= '9')) {
+			acc *= 16;
+			acc += (c - '0');
+		} else if ((c >= 'a') && (c <= 'f')) {
+			acc *= 16;
+			acc += ((c - 'a') + 10) ;
+		} else if ((c >= 'A') && (c <= 'F')) {
+			acc *= 16;
+			acc += ((c - 'A') + 10) ;
+		} else {
+#ifdef __ROMCC__
+			eth_pio_write_byte(acc, ((TX_START << 8)+offset), eth_nic_base);
+			offset++;
+#else
+			*mac++ = acc;
+#endif
+			acc = 0;
+		}
+
+		i++;
+	} while (c != '\0');
+}
+
+
+#ifndef __ROMCC__
+static void ns8390_tx_header(unsigned int eth_nic_base, int pktlen) {
+	unsigned short chksum;
+	unsigned char hdr[] = {
+#else
+static const unsigned char hdr[] = {
+#endif
+		/*
+		 * ETHERNET HDR
+		 */
+
+		// destination macaddr
+		0x02, 0x00, 0x00, 0x00, 0x00, 0x01,
+		/* source mac */
+		0x02, 0x00, 0x00, 0xC0, 0xFF, 0xEE,
+		/* ethtype (IP) */
+		0x08, 0x00,
+		/*
+		 * IP HDR
+		 */
+		0x45, 0x00, 0x00, 0x00, 0x00, 0x00, 0x40, 0x00,
+		/* TTL, proto (UDP), chksum_hi, chksum_lo, IP0, IP1, IP2, IP3, */
+		0x40, 0x11, 0x0, 0x0, 0x7f, 0x0, 0x0, 0x1,
+		/* IP0, IP1, IP2, IP3  */
+		0xff, 0xff, 0xff, 0xff,
+		/*
+		 * UDP HDR
+		 */
+		/*  SRC PORT DST PORT  (2bytes each), ulen, uchksum (must be zero or correct */
+		0x1a, 0x0b, 0x1a, 0x0a, 0x00, 0x9, 0x00, 0x00,
+	};
+
+#ifndef __ROMCC__
+	str2mac(CONFIG_CONSOLE_NE2K_DST_MAC,  &hdr[0]);
+	str2ip(CONFIG_CONSOLE_NE2K_DST_IP, &hdr[30]);
+	str2ip(CONFIG_CONSOLE_NE2K_SRC_IP, &hdr[26]);
+
+	/* zero checksum */
+	hdr[24] = 0;
+	hdr[25] = 0;
+
+	/* update IP packet len */
+	hdr[16] = ((28 + pktlen) >> 8) & 0xff;
+	hdr[17] = (28 + pktlen) & 0xff;
+
+	/* update UDP len */
+	hdr[38] = (8 + pktlen) >> 8;
+	hdr[39] = 8 + pktlen;
+
+	chksum = compute_ip_checksum(&hdr[14], 20);
+
+	hdr[25] = chksum >> 8;
+	hdr[24] = chksum;
+	eth_pio_write(hdr, (TX_START << 8), sizeof(hdr), eth_nic_base);
+}
+
+
+#else
+
+/* ROMCC madness */
+static void ns8390_tx_header(unsigned int eth_nic_base, int pktlen)
+{
+	unsigned short chksum;
+
+	eth_pio_write(hdr, (TX_START << 8), sizeof(hdr), eth_nic_base);
+
+	str2mac_load(CONFIG_CONSOLE_NE2K_DST_MAC, 0, eth_nic_base);
+
+	str2ip_load(CONFIG_CONSOLE_NE2K_DST_IP, 30, eth_nic_base);
+	str2ip_load(CONFIG_CONSOLE_NE2K_SRC_IP, 26, eth_nic_base);
+	/* zero checksum */
+	eth_pio_write_byte(0, (TX_START << 8)+24, eth_nic_base);
+	eth_pio_write_byte(0, (TX_START << 8)+25, eth_nic_base);
+
+	/* update IP packet len */
+	eth_pio_write_byte(((28 + pktlen) >> 8) & 0xff, (TX_START << 8)+16, eth_nic_base);
+	eth_pio_write_byte( (28 + pktlen) & 0xff, (TX_START << 8)+17, eth_nic_base);
+
+	/* update UDP len */
+	eth_pio_write_byte((8 + pktlen) >> 8, (TX_START << 8)+38, eth_nic_base);
+	eth_pio_write_byte( 8 + pktlen, (TX_START << 8)+39, eth_nic_base);
+
+	chksum = compute_ip_checksum_from_sram(14, 20, eth_nic_base);
+
+	eth_pio_write_byte(chksum, (TX_START << 8)+24, eth_nic_base);
+	eth_pio_write_byte(chksum >> 8, (TX_START << 8)+25, eth_nic_base);
+}
+
+#endif
+
+void ne2k_transmit(unsigned int eth_nic_base) {
+	unsigned int pktsize;
+	unsigned int len = get_count(eth_nic_base);
+
+	// so place whole header inside chip buffer
+	ns8390_tx_header(eth_nic_base, len);
+
+	// commit sending now
+	outb(D8390_COMMAND_PS0 | D8390_COMMAND_RD2 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+
+	outb(TX_START, eth_nic_base + D8390_P0_TPSR);
+
+	pktsize = 42 + len;
+	if (pktsize < 64)
+		pktsize = 64;
+
+	outb(pktsize, eth_nic_base + D8390_P0_TBCR0);
+	outb(pktsize >> 8, eth_nic_base + D8390_P0_TBCR1);
+
+	outb(D8390_ISR_PTX, eth_nic_base + D8390_P0_ISR);
+
+	outb(D8390_COMMAND_PS0 | D8390_COMMAND_TXP | D8390_COMMAND_RD2 | D8390_COMMAND_STA, eth_nic_base + D8390_P0_COMMAND);
+
+	/* wait for operation finish */
+	while ((inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_PTX) != D8390_ISR_PTX) ;
+
+	set_count(eth_nic_base, 0);
+}
+
+#ifdef __PRE_RAM__
+
+#include <arch/romcc_io.h>
+
+static void ns8390_reset(unsigned int eth_nic_base)
+{
+	int i;
+
+	outb(D8390_COMMAND_PS0 | D8390_COMMAND_RD2 |
+	     D8390_COMMAND_STP, eth_nic_base + D8390_P0_COMMAND);
+
+	outb(0x48, eth_nic_base + D8390_P0_DCR);
+	outb(0, eth_nic_base + D8390_P0_RBCR0);
+	outb(0, eth_nic_base + D8390_P0_RBCR1);
+	outb(0x20, eth_nic_base + D8390_P0_RCR);
+	outb(2, eth_nic_base + D8390_P0_TCR);
+	outb(TX_START, eth_nic_base + D8390_P0_TPSR);
+	outb(RX_START, eth_nic_base + D8390_P0_PSTART);
+	outb(MEM_SIZE, eth_nic_base + D8390_P0_PSTOP);
+	outb(MEM_SIZE - 1, eth_nic_base + D8390_P0_BOUND);
+	outb(0xFF, eth_nic_base + D8390_P0_ISR);
+	outb(0, eth_nic_base + D8390_P0_IMR);
+
+	outb(D8390_COMMAND_PS1 |
+	     D8390_COMMAND_RD2 | D8390_COMMAND_STP,
+	     eth_nic_base + D8390_P0_COMMAND);
+
+	for (i = 0; i < ETH_ALEN; i++)
+		outb(0x0C, eth_nic_base + D8390_P1_PAR0 + i);
+
+	for (i = 0; i < ETH_ALEN; i++)
+		outb(0xFF, eth_nic_base + D8390_P1_MAR0 + i);
+
+	outb(RX_START, eth_nic_base + D8390_P1_CURR);
+	outb(D8390_COMMAND_PS0 |
+	     D8390_COMMAND_RD2 | D8390_COMMAND_STA,
+	     eth_nic_base + D8390_P0_COMMAND);
+	outb(0xFF, eth_nic_base + D8390_P0_ISR);
+	outb(0, eth_nic_base + D8390_P0_TCR);
+	outb(4, eth_nic_base + D8390_P0_RCR);
+	set_count(eth_nic_base, 0);
+}
+
+
+int ne2k_init(unsigned int eth_nic_base) {
+
+	device_t dev;
+	unsigned char c;
+
+	/* Power management controller */
+	dev = pci_locate_device(PCI_ID(0x10ec,
+				       0x8029), 0);
+
+	if (dev == PCI_DEV_INVALID)
+		return 0;
+
+	pci_write_config32(dev, 0x10, eth_nic_base | 1 );
+	pci_write_config8(dev, 0x4, 0x1);
+
+	c = inb(eth_nic_base + NE_ASIC_OFFSET + NE_RESET);
+	outb(c, eth_nic_base + NE_ASIC_OFFSET + NE_RESET);
+
+	(void) inb(0x84);
+
+	outb(D8390_COMMAND_STP | D8390_COMMAND_RD2, eth_nic_base + D8390_P0_COMMAND);
+	outb(D8390_RCR_MON, eth_nic_base + D8390_P0_RCR);
+
+	outb(D8390_DCR_FT1 | D8390_DCR_LS, eth_nic_base + D8390_P0_DCR);
+	outb(MEM_8192, eth_nic_base + D8390_P0_PSTART);
+	outb(MEM_16384, eth_nic_base + D8390_P0_PSTOP);
+
+	ns8390_reset(eth_nic_base);
+	return 1;
+}
+
+#else
+
+#include <delay.h>
+#include <stdlib.h>
+#include <string.h>
+#include <arch/io.h>
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+
+static void read_resources(struct device *dev)
+{
+	struct resource *res;
+
+	res = new_resource(dev, PCI_BASE_ADDRESS_0);
+	res->base = CONFIG_CONSOLE_NE2K_IO_PORT;
+	res->size = 32;
+	res->align = 5;
+	res->gran = 5;
+	res->limit = res->base + res->size - 1;
+	res->flags = IORESOURCE_IO | IORESOURCE_FIXED | IORESOURCE_STORED |
+		     		IORESOURCE_ASSIGNED;
+	return;
+}
+
+
+static struct device_operations si_sata_ops  = {
+	.read_resources   = read_resources,
+	.set_resources    = pci_dev_set_resources,
+	.enable_resources = pci_dev_enable_resources,
+	.init             = 0,
+	.scan_bus         = 0,
+};
+
+static const struct pci_driver si_sata_driver __pci_driver = {
+        .ops    = &si_sata_ops,
+        .vendor = 0x10ec,
+        .device = 0x8029,
+};
+
+#endif
diff --git a/src/lib/ns8390.h b/src/lib/ns8390.h
new file mode 100644
index 0000000000..eeffe459f6
--- /dev/null
+++ b/src/lib/ns8390.h
@@ -0,0 +1,110 @@
+/**************************************************************************
+ETHERBOOT -  BOOTP/TFTP Bootstrap Program
+
+Author: Martin Renters
+  Date: Jun/94
+
+**************************************************************************/
+
+//FILE_LICENCE ( BSD2 );
+
+#define VENDOR_NONE	0
+#define VENDOR_WD	1
+#define VENDOR_NOVELL	2
+#define VENDOR_3COM	3
+
+#define FLAG_PIO	0x01
+#define FLAG_16BIT	0x02
+#define FLAG_790	0x04
+
+#define MEM_8192	32
+#define MEM_16384	64
+#define MEM_32768	128
+
+#define	ISA_MAX_ADDR	0x400
+
+/**************************************************************************
+NE1000/2000 definitions
+**************************************************************************/
+#define NE_ASIC_OFFSET	0x10
+#define NE_RESET	0x0F		/* Used to reset card */
+#define NE_DATA		0x00		/* Used to read/write NIC mem */
+
+#define COMPEX_RL2000_TRIES	200
+
+/**************************************************************************
+8390 Register Definitions
+**************************************************************************/
+#define D8390_P0_COMMAND	0x00
+#define D8390_P0_PSTART		0x01
+#define D8390_P0_PSTOP		0x02
+#define D8390_P0_BOUND		0x03
+#define D8390_P0_TSR		0x04
+#define	D8390_P0_TPSR		0x04
+#define D8390_P0_TBCR0		0x05
+#define D8390_P0_TBCR1		0x06
+#define D8390_P0_ISR		0x07
+#define D8390_P0_RSAR0		0x08
+#define D8390_P0_RSAR1		0x09
+#define D8390_P0_RBCR0		0x0A
+#define D8390_P0_RBCR1		0x0B
+#define D8390_P0_RSR		0x0C
+#define D8390_P0_RCR		0x0C
+#define D8390_P0_TCR		0x0D
+#define D8390_P0_DCR		0x0E
+#define D8390_P0_IMR		0x0F
+#define D8390_P1_COMMAND	0x00
+#define D8390_P1_PAR0		0x01
+#define D8390_P1_PAR1		0x02
+#define D8390_P1_PAR2		0x03
+#define D8390_P1_PAR3		0x04
+#define D8390_P1_PAR4		0x05
+#define D8390_P1_PAR5		0x06
+#define D8390_P1_CURR		0x07
+#define D8390_P1_MAR0		0x08
+
+#define D8390_COMMAND_PS0	0x0		/* Page 0 select */
+#define D8390_COMMAND_PS1	0x40		/* Page 1 select */
+#define D8390_COMMAND_PS2	0x80		/* Page 2 select */
+#define	D8390_COMMAND_RD2	0x20		/* Remote DMA control */
+#define D8390_COMMAND_RD1	0x10
+#define D8390_COMMAND_RD0	0x08
+#define D8390_COMMAND_TXP	0x04		/* transmit packet */
+#define D8390_COMMAND_STA	0x02		/* start */
+#define D8390_COMMAND_STP	0x01		/* stop */
+
+#define D8390_RCR_MON		0x20		/* monitor mode */
+
+#define D8390_DCR_FT1		0x40
+#define D8390_DCR_LS		0x08		/* Loopback select */
+#define D8390_DCR_WTS		0x01		/* Word transfer select */
+
+#define D8390_ISR_PRX		0x01		/* successful recv */
+#define D8390_ISR_PTX		0x02		/* successful xmit */
+#define D8390_ISR_RXE		0x04		/* receive error */
+#define D8390_ISR_TXE		0x08		/* transmit error */
+#define D8390_ISR_OVW		0x10		/* Overflow */
+#define D8390_ISR_CNT		0x20		/* Counter overflow */
+#define D8390_ISR_RDC		0x40		/* Remote DMA complete */
+#define D8390_ISR_RST		0x80		/* reset */
+
+#define D8390_RSTAT_PRX		0x01		/* successful recv */
+#define D8390_RSTAT_CRC		0x02		/* CRC error */
+#define D8390_RSTAT_FAE		0x04		/* Frame alignment error */
+#define D8390_RSTAT_OVER	0x08		/* FIFO overrun */
+
+#define D8390_TXBUF_SIZE	6
+#define D8390_RXBUF_END		32
+#define D8390_PAGE_SIZE         256
+
+struct ringbuffer {
+	unsigned char status;
+	unsigned char next;
+	unsigned short len;
+};
+/*
+ * Local variables:
+ *  c-basic-offset: 8
+ * End:
+ */
+