Initial import of qemu-2.4.1HEADmaster

1 files changed, 997 insertions, 0 deletions

diff --git a/roms/ipxe/src/drivers/net/3c90x.c b/roms/ipxe/src/drivers/net/3c90x.c
new file mode 100644
index 00000000..853de2b5
--- /dev/null
+++ b/roms/ipxe/src/drivers/net/3c90x.c
@@ -0,0 +1,997 @@
+/*
+ * 3c90x.c -- This file implements a iPXE API 3c90x driver
+ *
+ * Originally written for etherboot by:
+ *   Greg Beeley, Greg.Beeley@LightSys.org
+ * Modified by Steve Smith,
+ *   Steve.Smith@Juno.Com. Alignment bug fix Neil Newell (nn@icenoir.net).
+ * Almost totally Rewritten to use iPXE API, implementation of tx/rx ring support
+ *   by Thomas Miletich, thomas.miletich@gmail.com
+ *   Thanks to Marty Connor and Stefan Hajnoczi for their help and feedback,
+ *   and to Daniel Verkamp for his help with testing.
+ *
+ * Copyright (c) 2009 Thomas Miletich
+ *
+ * Copyright (c) 1999 LightSys Technology Services, Inc.
+ * Portions Copyright (c) 1999 Steve Smith
+ *
+ * This program may be re-distributed in source or binary form, modified,
+ * sold, or copied for any purpose, provided that the above copyright message
+ * and this text are included with all source copies or derivative works, and
+ * provided that the above copyright message and this text are included in the
+ * documentation of any binary-only distributions.  This program is distributed
+ * WITHOUT ANY WARRANTY, without even the warranty of FITNESS FOR A PARTICULAR
+ * PURPOSE or MERCHANTABILITY.  Please read the associated documentation
+ * "3c90x.txt" before compiling and using this driver.
+ *
+ * [ --mdc 20090313 The 3c90x.txt file is now at:
+ *   http://etherboot.org/wiki/appnotes/3c90x_issues ]
+ *
+ * This program was written with the assistance of the 3com documentation for
+ * the 3c905B-TX card, as well as with some assistance from the 3c59x
+ * driver Donald Becker wrote for the Linux kernel, and with some assistance
+ * from the remainder of the Etherboot distribution.
+ *
+ * Indented with unix 'indent' command: 
+ *   $ indent -kr -i8 3c90x.c
+ */
+
+FILE_LICENCE ( BSD2 );
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+#include <assert.h>
+#include <byteswap.h>
+#include <errno.h>
+#include <ipxe/ethernet.h>
+#include <ipxe/if_ether.h>
+#include <ipxe/io.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/malloc.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/pci.h>
+#include <ipxe/timer.h>
+#include <ipxe/nvs.h>
+
+#include "3c90x.h"
+
+/**
+ * a3c90x_internal_IssueCommand: sends a command to the 3c90x card
+ * and waits for it's completion
+ *
+ * @v ioaddr	IOAddress of the NIC
+ * @v cmd	Command to be issued
+ * @v param	Command parameter
+ */
+static void a3c90x_internal_IssueCommand(int ioaddr, int cmd, int param)
+{
+	unsigned int val = (cmd << 11) | param;
+	int cnt = 0;
+
+	DBGP("a3c90x_internal_IssueCommand\n");
+
+	/* Send the cmd to the cmd register */
+	outw(val, ioaddr + regCommandIntStatus_w);
+
+	/* Wait for the cmd to complete */
+	for (cnt = 0; cnt < 100000; cnt++) {
+		if (inw(ioaddr + regCommandIntStatus_w) & INT_CMDINPROGRESS) {
+			continue;
+		} else {
+			DBG2("Command 0x%04X finished in time. cnt = %d.\n", cmd, cnt);
+			return;
+		}
+	}
+
+	DBG("Command 0x%04X DID NOT finish in time. cnt = %d.\n", cmd, cnt);
+}
+
+/**
+ * a3c90x_internal_SetWindow: selects a register window set.
+ *
+ * @v inf_3c90x	private NIC data
+ * @v window	window to be selected
+ */
+static void a3c90x_internal_SetWindow(struct INF_3C90X *inf_3c90x, int window)
+{
+	DBGP("a3c90x_internal_SetWindow\n");
+	/* Window already as set? */
+	if (inf_3c90x->CurrentWindow == window)
+		return;
+
+	/* Issue the window command. */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdSelectRegisterWindow, window);
+	inf_3c90x->CurrentWindow = window;
+
+	return;
+}
+
+static void a3c90x_internal_WaitForEeprom(struct INF_3C90X *inf_3c90x)
+{
+	int cnt = 0;
+
+	DBGP("a3c90x_internal_WaitForEeprom\n");
+
+	while (eepromBusy & inw(inf_3c90x->IOAddr + regEepromCommand_0_w)) {
+		if (cnt == EEPROM_TIMEOUT) {
+			DBG("Read from eeprom failed: timeout\n");
+			return;
+		}
+		udelay(1);
+		cnt++;
+	}
+}
+
+/**
+ * a3c90x_internal_ReadEeprom - nvs routine to read eeprom data
+ * We only support reading one word(2 byte). The nvs subsystem will make sure
+ * that the routine will never be called with len != 2.
+ *
+ * @v nvs	nvs data.
+ * @v address	eeprom address to read data from.
+ * @v data	data is put here.
+ * @v len	number of bytes to read.
+ */
+static int
+a3c90x_internal_ReadEeprom(struct nvs_device *nvs, unsigned int address, void *data, size_t len)
+{
+	unsigned short *dest = (unsigned short *) data;
+	struct INF_3C90X *inf_3c90x =
+	    container_of(nvs, struct INF_3C90X, nvs);
+
+	DBGP("a3c90x_internal_ReadEeprom\n");
+
+	/* we support reading 2 bytes only */
+	assert(len == 2);
+
+	/* Select correct window */
+	a3c90x_internal_SetWindow(inf_3c90x, winEepromBios0);
+
+	/* set eepromRead bits in command sent to NIC */
+	address += (inf_3c90x->is3c556 ? eepromRead_556 : eepromRead);
+
+	a3c90x_internal_WaitForEeprom(inf_3c90x);
+	/* send address to NIC */
+	outw(address, inf_3c90x->IOAddr + regEepromCommand_0_w);
+	a3c90x_internal_WaitForEeprom(inf_3c90x);
+
+	/* read value */
+	*dest = inw(inf_3c90x->IOAddr + regEepromData_0_w);
+
+	return 0;
+}
+
+/**
+ * a3c90x_internal_WriteEeprom - nvs routine to write eeprom data
+ * currently not implemented
+ *
+ * @v nvs	nvs data.
+ * @v address	eeprom address to read data from.
+ * @v data	data is put here.
+ * @v len	number of bytes to read.
+ */
+static int
+a3c90x_internal_WriteEeprom(struct nvs_device *nvs __unused,
+			    unsigned int address __unused,
+			    const void *data __unused, size_t len __unused)
+{
+	return -ENOTSUP;
+}
+
+static void a3c90x_internal_ReadEepromContents(struct INF_3C90X *inf_3c90x)
+{
+	int eeprom_size = (inf_3c90x->isBrev ? 0x20 : 0x17) * 2;
+
+	DBGP("a3c90x_internal_ReadEepromContents\n");
+
+	nvs_read(&inf_3c90x->nvs, 0, inf_3c90x->eeprom, eeprom_size);
+}
+
+/**
+ * a3c90x_reset: exported function that resets the card to its default
+ * state.  This is so the Linux driver can re-set the card up the way
+ * it wants to.  If CFG_3C90X_PRESERVE_XCVR is defined, then the reset will
+ * not alter the selected transceiver that we used to download the boot
+ * image.
+ *
+ * @v inf_3c90x	Private NIC data
+ */
+static void a3c90x_reset(struct INF_3C90X *inf_3c90x)
+{
+	DBGP("a3c90x_reset\n");
+	/* Send the reset command to the card */
+	DBG2("3c90x: Issuing RESET\n");
+
+	/* reset of the receiver on B-revision cards re-negotiates the link
+	 * takes several seconds (a computer eternity), so we don't reset
+	 * it here.
+	 */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdGlobalReset,
+				     globalResetMaskNetwork);
+
+	/* global reset command resets station mask, non-B revision cards
+	 * require explicit reset of values
+	 */
+	a3c90x_internal_SetWindow(inf_3c90x, winAddressing2);
+	outw(0, inf_3c90x->IOAddr + regStationMask_2_3w + 0);
+	outw(0, inf_3c90x->IOAddr + regStationMask_2_3w + 2);
+	outw(0, inf_3c90x->IOAddr + regStationMask_2_3w + 4);
+
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdTxEnable, 0);
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdRxEnable, 0);
+
+	/* enable rxComplete and txComplete indications */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdSetIndicationEnable,
+				     INT_TXCOMPLETE | INT_UPCOMPLETE);
+
+	/* acknowledge any pending status flags */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdAcknowledgeInterrupt, 0x661);
+
+	return;
+}
+
+/**
+ * a3c90x_setup_tx_ring - Allocates TX ring, initialize tx_desc values
+ *
+ * @v p	Private NIC data
+ *
+ * @ret Returns 0 on success, negative on failure
+ */
+static int a3c90x_setup_tx_ring(struct INF_3C90X *p)
+{
+	DBGP("a3c90x_setup_tx_ring\n");
+	p->tx_ring =
+	    malloc_dma(TX_RING_SIZE * sizeof(struct TXD), TX_RING_ALIGN);
+
+	if (!p->tx_ring) {
+		DBG("Could not allocate TX-ring\n");
+		return -ENOMEM;
+	}
+
+	memset(p->tx_ring, 0, TX_RING_SIZE * sizeof(struct TXD));
+	p->tx_cur = 0;
+	p->tx_cnt = 0;
+	p->tx_tail = 0;
+
+	return 0;
+}
+
+/**
+ * a3c90x_process_tx_packets - Checks for successfully sent packets,
+ * reports them to iPXE with netdev_tx_complete();
+ *
+ * @v netdev	Network device info
+ */
+static void a3c90x_process_tx_packets(struct net_device *netdev)
+{
+	struct INF_3C90X *p = netdev_priv(netdev);
+	unsigned int downlist_ptr;
+
+	DBGP("a3c90x_process_tx_packets\n");
+
+	DBG2("    tx_cnt: %d\n", p->tx_cnt);
+
+	while (p->tx_tail != p->tx_cur) {
+
+		downlist_ptr = inl(p->IOAddr + regDnListPtr_l);
+
+		DBG2("    downlist_ptr: %#08x\n", downlist_ptr);
+		DBG2("    tx_tail: %d tx_cur: %d\n", p->tx_tail, p->tx_cur);
+
+		/* NIC is currently working on this tx desc */
+		if(downlist_ptr == virt_to_bus(p->tx_ring + p->tx_tail))
+			return;
+
+		netdev_tx_complete(netdev, p->tx_iobuf[p->tx_tail]);
+
+		DBG2("transmitted packet\n");
+		DBG2("    size: %zd\n", iob_len(p->tx_iobuf[p->tx_tail]));
+
+		p->tx_tail = (p->tx_tail + 1) % TX_RING_SIZE;
+		p->tx_cnt--;
+	}
+}
+
+static void a3c90x_free_tx_ring(struct INF_3C90X *p)
+{
+	DBGP("a3c90x_free_tx_ring\n");
+
+	free_dma(p->tx_ring, TX_RING_SIZE * sizeof(struct TXD));
+	p->tx_ring = NULL;
+	/* io_buffers are free()ed by netdev_tx_complete[,_err]() */
+}
+
+/**
+ * a3c90x_transmit - Transmits a packet.
+ *
+ * @v netdev	Network device info
+ * @v iob		io_buffer containing the data to be send
+ *
+ * @ret	Returns 0 on success, negative on failure
+ */
+static int a3c90x_transmit(struct net_device *netdev,
+			   struct io_buffer *iob)
+{
+	struct INF_3C90X *inf_3c90x = netdev_priv(netdev);
+	struct TXD *tx_cur_desc;
+	struct TXD *tx_prev_desc;
+
+	unsigned int len;
+	unsigned int downlist_ptr;
+
+	DBGP("a3c90x_transmit\n");
+
+	if (inf_3c90x->tx_cnt == TX_RING_SIZE) {
+		DBG("TX-Ring overflow\n");
+		return -ENOBUFS;
+	}
+
+	inf_3c90x->tx_iobuf[inf_3c90x->tx_cur] = iob;
+	tx_cur_desc = inf_3c90x->tx_ring + inf_3c90x->tx_cur;
+
+	tx_prev_desc = inf_3c90x->tx_ring +
+	    (((inf_3c90x->tx_cur + TX_RING_SIZE) - 1) % TX_RING_SIZE);
+
+	len = iob_len(iob);
+
+	/* Setup the DPD (download descriptor) */
+	tx_cur_desc->DnNextPtr = 0;
+
+	/* FrameStartHeader differs in 90x and >= 90xB
+	 * It contains the packet length in 90x and a round up boundary and
+	 * packet ID for 90xB and 90xC. Disable packet length round-up on the
+	 * later revisions.
+	 */
+	tx_cur_desc->FrameStartHeader =
+	    fshTxIndicate | (inf_3c90x->isBrev ? fshRndupDefeat : len);
+
+	tx_cur_desc->DataAddr = virt_to_bus(iob->data);
+	tx_cur_desc->DataLength = len | downLastFrag;
+
+	/* We have to stall the download engine, so the NIC won't access the
+	 * tx descriptor while we modify it. There is a way around this
+	 * from revision B and upwards. To stay compatible with older revisions
+	 * we don't use it here.
+	 */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdStallCtl,
+				     dnStall);
+
+	tx_prev_desc->DnNextPtr = virt_to_bus(tx_cur_desc);
+
+	downlist_ptr = inl(inf_3c90x->IOAddr + regDnListPtr_l);
+	if (downlist_ptr == 0) {
+		/* currently no DownList, sending a new one */
+		outl(virt_to_bus(tx_cur_desc),
+		     inf_3c90x->IOAddr + regDnListPtr_l);
+	}
+
+	/* End Stall */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdStallCtl,
+				     dnUnStall);
+
+	inf_3c90x->tx_cur = (inf_3c90x->tx_cur + 1) % TX_RING_SIZE;
+	inf_3c90x->tx_cnt++;
+
+	return 0;
+}
+
+/**
+ * a3c90x_prepare_rx_desc - fills the rx desc with initial data
+ *
+ * @v p		NIC private data
+ * @v index	Index for rx_iobuf and rx_ring array
+ */
+
+static void a3c90x_prepare_rx_desc(struct INF_3C90X *p, unsigned int index)
+{
+	DBGP("a3c90x_prepare_rx_desc\n");
+	DBG2("Populating rx_desc %d\n", index);
+
+	/* We have to stall the upload engine, so the NIC won't access the
+	 * rx descriptor while we modify it. There is a way around this
+	 * from revision B and upwards. To stay compatible with older revisions
+	 * we don't use it here.
+	 */
+	a3c90x_internal_IssueCommand(p->IOAddr, cmdStallCtl, upStall);
+
+	p->rx_ring[index].DataAddr = virt_to_bus(p->rx_iobuf[index]->data);
+	p->rx_ring[index].DataLength = RX_BUF_SIZE | upLastFrag;
+	p->rx_ring[index].UpPktStatus = 0;
+
+	/* unstall upload engine */
+	a3c90x_internal_IssueCommand(p->IOAddr, cmdStallCtl, upUnStall);
+}
+
+/**
+ * a3c90x_refill_rx_ring -checks every entry in the rx ring and reallocates
+ * them as necessary. Then it calls a3c90x_prepare_rx_desc to fill the rx desc
+ * with initial data.
+ *
+ * @v p		NIC private data
+ */
+static void a3c90x_refill_rx_ring(struct INF_3C90X *p)
+{
+	int i;
+	unsigned int status;
+	struct RXD *rx_cur_desc;
+
+	DBGP("a3c90x_refill_rx_ring\n");
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		rx_cur_desc = p->rx_ring + i;
+		status = rx_cur_desc->UpPktStatus;
+
+		/* only refill used descriptor */
+		if (!(status & upComplete))
+			continue;
+
+		/* we still need to process this descriptor */
+		if (p->rx_iobuf[i] != NULL)
+			continue;
+
+		p->rx_iobuf[i] = alloc_iob(RX_BUF_SIZE);
+		if (p->rx_iobuf[i] == NULL) {
+			DBG("alloc_iob() failed\n");
+			break;
+		}
+
+		a3c90x_prepare_rx_desc(p, i);
+	}
+}
+
+/**
+ * a3c90x_setup_rx_ring - Allocates RX ring, initialize rx_desc values
+ *
+ * @v p	Private NIC data
+ *
+ * @ret Returns 0 on success, negative on failure
+ */
+static int a3c90x_setup_rx_ring(struct INF_3C90X *p)
+{
+	int i;
+
+	DBGP("a3c90x_setup_rx_ring\n");
+
+	p->rx_ring =
+	    malloc_dma(RX_RING_SIZE * sizeof(struct RXD), RX_RING_ALIGN);
+
+	if (!p->rx_ring) {
+		DBG("Could not allocate RX-ring\n");
+		return -ENOMEM;
+	}
+
+	p->rx_cur = 0;
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		p->rx_ring[i].UpNextPtr =
+		    virt_to_bus(p->rx_ring + (i + 1));
+
+		/* these are needed so refill_rx_ring initializes the ring */
+		p->rx_ring[i].UpPktStatus = upComplete;
+		p->rx_iobuf[i] = NULL;
+	}
+
+	/* Loop the ring */
+	p->rx_ring[i - 1].UpNextPtr = virt_to_bus(p->rx_ring);
+
+	a3c90x_refill_rx_ring(p);
+
+	return 0;
+}
+
+static void a3c90x_free_rx_ring(struct INF_3C90X *p)
+{
+	DBGP("a3c90x_free_rx_ring\n");
+
+	free_dma(p->rx_ring, RX_RING_SIZE * sizeof(struct RXD));
+	p->rx_ring = NULL;
+}
+
+static void a3c90x_free_rx_iobuf(struct INF_3C90X *p)
+{
+	int i;
+
+	DBGP("a3c90x_free_rx_iobuf\n");
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		free_iob(p->rx_iobuf[i]);
+		p->rx_iobuf[i] = NULL;
+	}
+}
+
+/**
+ * a3c90x_process_rx_packets - Checks for received packets,
+ * reports them to iPXE with netdev_rx() or netdev_rx_err() if there was an
+ * error while receiving the packet
+ *
+ * @v netdev	Network device info
+ */
+static void a3c90x_process_rx_packets(struct net_device *netdev)
+{
+	int i;
+	unsigned int rx_status;
+	struct INF_3C90X *p = netdev_priv(netdev);
+	struct RXD *rx_cur_desc;
+
+	DBGP("a3c90x_process_rx_packets\n");
+
+	for (i = 0; i < RX_RING_SIZE; i++) {
+		rx_cur_desc = p->rx_ring + p->rx_cur;
+		rx_status = rx_cur_desc->UpPktStatus;
+
+		if (!(rx_status & upComplete) && !(rx_status & upError))
+			break;
+
+		if (p->rx_iobuf[p->rx_cur] == NULL)
+			break;
+
+		if (rx_status & upError) {
+			DBG("Corrupted packet received: %#x\n", rx_status);
+			netdev_rx_err(netdev, p->rx_iobuf[p->rx_cur],
+				      -EINVAL);
+		} else {
+			/* if we're here, we've got good packet */
+			int packet_len;
+
+			packet_len = rx_status & 0x1FFF;
+			iob_put(p->rx_iobuf[p->rx_cur], packet_len);
+
+			DBG2("received packet\n");
+			DBG2("    size: %d\n", packet_len);
+
+			netdev_rx(netdev, p->rx_iobuf[p->rx_cur]);
+		}
+
+		p->rx_iobuf[p->rx_cur] = NULL;	/* invalidate rx desc */
+		p->rx_cur = (p->rx_cur + 1) % RX_RING_SIZE;
+	}
+	a3c90x_refill_rx_ring(p);
+
+}
+
+/**
+ * a3c90x_poll - Routine that gets called periodically.
+ * Here we hanle transmitted and received packets.
+ * We could also check the link status from time to time, which we
+ * currently don't do.
+ *
+ * @v netdev	Network device info
+ */
+static void a3c90x_poll(struct net_device *netdev)
+{
+	struct INF_3C90X *p = netdev_priv(netdev);
+	uint16_t raw_status, int_status;
+
+	DBGP("a3c90x_poll\n");
+
+	raw_status = inw(p->IOAddr + regCommandIntStatus_w);
+	int_status = (raw_status & 0x0FFF);
+
+	if ( int_status == 0 )
+		return;
+
+	a3c90x_internal_IssueCommand(p->IOAddr, cmdAcknowledgeInterrupt,
+				     int_status);
+
+	if (int_status & INT_TXCOMPLETE)
+		outb(0x00, p->IOAddr + regTxStatus_b);
+
+	DBG2("poll: status = %#04x\n", raw_status);
+
+	a3c90x_process_tx_packets(netdev);
+
+	a3c90x_process_rx_packets(netdev);
+}
+
+
+
+static void a3c90x_free_resources(struct INF_3C90X *p)
+{
+	DBGP("a3c90x_free_resources\n");
+
+	a3c90x_free_tx_ring(p);
+	a3c90x_free_rx_ring(p);
+	a3c90x_free_rx_iobuf(p);
+}
+
+/**
+ * a3c90x_remove - Routine to remove the card. Unregisters
+ * the NIC from iPXE, disables RX/TX and resets the card.
+ *
+ * @v pci	PCI device info
+ */
+static void a3c90x_remove(struct pci_device *pci)
+{
+	struct net_device *netdev = pci_get_drvdata(pci);
+	struct INF_3C90X *inf_3c90x = netdev_priv(netdev);
+
+	DBGP("a3c90x_remove\n");
+
+	a3c90x_reset(inf_3c90x);
+
+	/* Disable the receiver and transmitter. */
+	outw(cmdRxDisable, inf_3c90x->IOAddr + regCommandIntStatus_w);
+	outw(cmdTxDisable, inf_3c90x->IOAddr + regCommandIntStatus_w);
+
+	unregister_netdev(netdev);
+	netdev_nullify(netdev);
+	netdev_put(netdev);
+}
+
+static void a3c90x_irq(struct net_device *netdev, int enable)
+{
+	struct INF_3C90X *p = netdev_priv(netdev);
+
+	DBGP("a3c90x_irq\n");
+
+	if (enable == 0) {
+		/* disable interrupts */
+		a3c90x_internal_IssueCommand(p->IOAddr,
+					     cmdSetInterruptEnable, 0);
+	} else {
+		a3c90x_internal_IssueCommand(p->IOAddr,
+					     cmdSetInterruptEnable,
+					     INT_TXCOMPLETE |
+					     INT_UPCOMPLETE);
+		a3c90x_internal_IssueCommand(p->IOAddr,
+					     cmdAcknowledgeInterrupt,
+					     0x661);
+	}
+}
+
+/**
+ * a3c90x_hw_start - Initialize hardware, copy MAC address
+ * to NIC registers, set default receiver
+ */
+static void a3c90x_hw_start(struct net_device *netdev)
+{
+	int i, c;
+	unsigned int cfg;
+	unsigned int mopt;
+	unsigned short linktype;
+	struct INF_3C90X *inf_3c90x = netdev_priv(netdev);
+
+	DBGP("a3c90x_hw_start\n");
+
+	/* 3C556: Invert MII power */
+	if (inf_3c90x->is3c556) {
+		unsigned int tmp;
+		a3c90x_internal_SetWindow(inf_3c90x, winAddressing2);
+		tmp = inw(inf_3c90x->IOAddr + regResetOptions_2_w);
+		tmp |= 0x4000;
+		outw(tmp, inf_3c90x->IOAddr + regResetOptions_2_w);
+	}
+
+	/* Copy MAC address into the NIC registers */
+	a3c90x_internal_SetWindow(inf_3c90x, winAddressing2);
+	for (i = 0; i < ETH_ALEN; i++)
+		outb(netdev->ll_addr[i],
+		     inf_3c90x->IOAddr + regStationAddress_2_3w + i);
+	for (i = 0; i < ETH_ALEN; i++)
+		outb(0, inf_3c90x->IOAddr + regStationMask_2_3w + i);
+
+	/* Read the media options register, print a message and set default
+	* xcvr.
+	*
+	* Uses Media Option command on B revision, Reset Option on non-B
+	* revision cards -- same register address
+	*/
+	a3c90x_internal_SetWindow(inf_3c90x, winTxRxOptions3);
+	mopt = inw(inf_3c90x->IOAddr + regResetMediaOptions_3_w);
+
+	/* mask out VCO bit that is defined as 10baseFL bit on B-rev cards */
+	if (!inf_3c90x->isBrev) {
+		mopt &= 0x7F;
+	}
+
+	DBG2("Connectors present: ");
+	c = 0;
+	linktype = 0x0008;
+	if (mopt & 0x01) {
+		DBG2("%s100Base-T4", (c++) ? ", " : "");
+		linktype = linkMII;
+	}
+	if (mopt & 0x04) {
+		DBG2("%s100Base-FX", (c++) ? ", " : "");
+		linktype = link100BaseFX;
+	}
+	if (mopt & 0x10) {
+		DBG2("%s10Base-2", (c++) ? ", " : "");
+		linktype = link10Base2;
+	}
+	if (mopt & 0x20) {
+		DBG2("%sAUI", (c++) ? ", " : "");
+		linktype = linkAUI;
+	}
+	if (mopt & 0x40) {
+		DBG2("%sMII", (c++) ? ", " : "");
+		linktype = linkMII;
+	}
+	if ((mopt & 0xA) == 0xA) {
+		DBG2("%s10Base-T / 100Base-TX", (c++) ? ", " : "");
+		linktype = linkAutoneg;
+	} else if ((mopt & 0xA) == 0x2) {
+		DBG2("%s100Base-TX", (c++) ? ", " : "");
+		linktype = linkAutoneg;
+	} else if ((mopt & 0xA) == 0x8) {
+		DBG2("%s10Base-T", (c++) ? ", " : "");
+		linktype = linkAutoneg;
+	}
+	DBG2(".\n");
+
+	/* Determine transceiver type to use, depending on value stored in
+	* eeprom 0x16
+	*/
+	if (inf_3c90x->isBrev) {
+		if ((inf_3c90x->eeprom[0x16] & 0xFF00) == XCVR_MAGIC) {
+			/* User-defined */
+			linktype = inf_3c90x->eeprom[0x16] & 0x000F;
+		}
+	} else {
+		/* I don't know what MII MAC only mode is!!! */
+		if (linktype == linkExternalMII) {
+			if (inf_3c90x->isBrev)
+				DBG("WARNING: MII External MAC Mode only supported on B-revision " "cards!!!!\nFalling Back to MII Mode\n");
+			linktype = linkMII;
+		}
+	}
+
+	/* enable DC converter for 10-Base-T */
+	if (linktype == link10Base2) {
+		a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+					     cmdEnableDcConverter, 0);
+	}
+
+	/* Set the link to the type we just determined. */
+	a3c90x_internal_SetWindow(inf_3c90x, winTxRxOptions3);
+	cfg = inl(inf_3c90x->IOAddr + regInternalConfig_3_l);
+	cfg &= ~(0xF << 20);
+	cfg |= (linktype << 20);
+
+	DBG2("Setting internal cfg register: 0x%08X (linktype: 0x%02X)\n",
+	    cfg, linktype);
+
+	outl(cfg, inf_3c90x->IOAddr + regInternalConfig_3_l);
+
+	/* Now that we set the xcvr type, reset the Tx and Rx */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdTxReset, 0x00);
+
+	if (!inf_3c90x->isBrev)
+		outb(0x01, inf_3c90x->IOAddr + regTxFreeThresh_b);
+
+	/* Set the RX filter = receive only individual pkts & multicast & bcast. */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdSetRxFilter,
+				     0x01 + 0x02 + 0x04);
+
+
+	/*
+	* set Indication and Interrupt flags , acknowledge any IRQ's
+	*/
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdSetInterruptEnable,
+	 INT_TXCOMPLETE | INT_UPCOMPLETE);
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdSetIndicationEnable,
+	 INT_TXCOMPLETE | INT_UPCOMPLETE);
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr,
+				     cmdAcknowledgeInterrupt, 0x661);
+}
+
+/**
+ * a3c90x_open - Routine to initialize the card. Initialize hardware,
+ * allocate TX and RX ring, send RX ring address to the NIC.
+ *
+ * @v netdev	Network device info
+ *
+ * @ret Returns 0 on success, negative on failure
+ */
+static int a3c90x_open(struct net_device *netdev)
+{
+	int rc;
+	struct INF_3C90X *inf_3c90x = netdev_priv(netdev);
+
+	DBGP("a3c90x_open\n");
+
+	a3c90x_hw_start(netdev);
+
+	rc = a3c90x_setup_tx_ring(inf_3c90x);
+	if (rc != 0) {
+		DBG("Error setting up TX Ring\n");
+		goto error;
+	}
+
+	rc = a3c90x_setup_rx_ring(inf_3c90x);
+	if (rc != 0) {
+		DBG("Error setting up RX Ring\n");
+		goto error;
+	}
+
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdStallCtl, upStall);
+
+	/* send rx_ring address to NIC */
+	outl(virt_to_bus(inf_3c90x->rx_ring),
+	     inf_3c90x->IOAddr + regUpListPtr_l);
+
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdStallCtl, upUnStall);
+
+	/* set maximum allowed receive packet length */
+	a3c90x_internal_SetWindow(inf_3c90x, winTxRxOptions3);
+	outl(RX_BUF_SIZE, inf_3c90x->IOAddr + regMaxPktSize_3_w);
+
+	/* enable packet transmission and reception */
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdTxEnable, 0);
+	a3c90x_internal_IssueCommand(inf_3c90x->IOAddr, cmdRxEnable, 0);
+
+	return 0;
+
+      error:
+	a3c90x_free_resources(inf_3c90x);
+	a3c90x_reset(inf_3c90x);
+	return rc;
+}
+
+/**
+ * a3c90x_close - free()s TX and RX ring, disablex RX/TX, resets NIC
+ *
+ * @v netdev	Network device info
+ */
+static void a3c90x_close(struct net_device *netdev)
+{
+	struct INF_3C90X *inf_3c90x = netdev_priv(netdev);
+
+	DBGP("a3c90x_close\n");
+
+	a3c90x_reset(inf_3c90x);
+	outw(cmdRxDisable, inf_3c90x->IOAddr + regCommandIntStatus_w);
+	outw(cmdTxDisable, inf_3c90x->IOAddr + regCommandIntStatus_w);
+	a3c90x_free_resources(inf_3c90x);
+}
+
+static struct net_device_operations a3c90x_operations = {
+	.open = a3c90x_open,
+	.close = a3c90x_close,
+	.poll = a3c90x_poll,
+	.transmit = a3c90x_transmit,
+	.irq = a3c90x_irq,
+};
+
+/**
+ * a3c90x_probe: exported routine to probe for the 3c905 card.
+ * If this routine is called, the pci functions did find the
+ * card.  We read the eeprom here and get the MAC address.
+ * Initialization is done in a3c90x_open().
+ *
+ * @v pci	PCI device info
+ * @ pci_id	PCI device IDs
+ *
+ * @ret rc	Returns 0 on success, negative on failure
+ */
+static int a3c90x_probe(struct pci_device *pci)
+{
+
+	struct net_device *netdev;
+	struct INF_3C90X *inf_3c90x;
+	unsigned char *HWAddr;
+	int rc;
+
+	DBGP("a3c90x_probe\n");
+
+	if (pci->ioaddr == 0)
+		return -EINVAL;
+
+	netdev = alloc_etherdev(sizeof(*inf_3c90x));
+	if (!netdev)
+		return -ENOMEM;
+
+	netdev_init(netdev, &a3c90x_operations);
+	pci_set_drvdata(pci, netdev);
+	netdev->dev = &pci->dev;
+
+	inf_3c90x = netdev_priv(netdev);
+	memset(inf_3c90x, 0, sizeof(*inf_3c90x));
+
+	adjust_pci_device(pci);
+
+	inf_3c90x->is3c556 = (pci->device == 0x6055);
+	inf_3c90x->IOAddr = pci->ioaddr;
+	inf_3c90x->CurrentWindow = winNone;
+
+	inf_3c90x->isBrev = 1;
+	switch (pci->device) {
+	case 0x9000:		/* 10 Base TPO             */
+	case 0x9001:		/* 10/100 T4               */
+	case 0x9050:		/* 10/100 TPO              */
+	case 0x9051:		/* 10 Base Combo           */
+		inf_3c90x->isBrev = 0;
+		break;
+	}
+
+	DBG2("[3c90x]: found NIC(0x%04X, 0x%04X), isBrev=%d, is3c556=%d\n",
+	    pci->vendor, pci->device, inf_3c90x->isBrev,
+	    inf_3c90x->is3c556);
+
+	/* initialize nvs device */
+	inf_3c90x->nvs.word_len_log2 = 1;	/* word */
+	inf_3c90x->nvs.size = (inf_3c90x->isBrev ? 0x20 : 0x17);
+	inf_3c90x->nvs.block_size = 1;
+	inf_3c90x->nvs.read = a3c90x_internal_ReadEeprom;
+	inf_3c90x->nvs.write = a3c90x_internal_WriteEeprom;
+
+	/* reset NIC before accessing any data from it */
+	a3c90x_reset(inf_3c90x);
+
+	/* load eeprom contents to inf_3c90x->eeprom */
+	a3c90x_internal_ReadEepromContents(inf_3c90x);
+
+	HWAddr = netdev->hw_addr;
+
+	/* Retrieve the Hardware address */
+	HWAddr[0] = inf_3c90x->eeprom[eepromHwAddrOffset + 0] >> 8;
+	HWAddr[1] = inf_3c90x->eeprom[eepromHwAddrOffset + 0] & 0xFF;
+	HWAddr[2] = inf_3c90x->eeprom[eepromHwAddrOffset + 1] >> 8;
+	HWAddr[3] = inf_3c90x->eeprom[eepromHwAddrOffset + 1] & 0xFF;
+	HWAddr[4] = inf_3c90x->eeprom[eepromHwAddrOffset + 2] >> 8;
+	HWAddr[5] = inf_3c90x->eeprom[eepromHwAddrOffset + 2] & 0xFF;
+
+	if ((rc = register_netdev(netdev)) != 0) {
+		DBG("3c90x: register_netdev() failed\n");
+		netdev_put(netdev);
+		return rc;
+	}
+
+	/* we don't handle linkstates yet, so we're always up */
+	netdev_link_up(netdev);
+
+	return 0;
+}
+
+static struct pci_device_id a3c90x_nics[] = {
+/* Original 90x revisions: */
+	PCI_ROM(0x10b7, 0x6055, "3c556", "3C556", 0),	/* Huricane */
+	PCI_ROM(0x10b7, 0x9000, "3c905-tpo", "3Com900-TPO", 0),	/* 10 Base TPO */
+	PCI_ROM(0x10b7, 0x9001, "3c905-t4", "3Com900-Combo", 0),	/* 10/100 T4 */
+	PCI_ROM(0x10b7, 0x9050, "3c905-tpo100", "3Com905-TX", 0),	/* 100 Base TX / 10/100 TPO */
+	PCI_ROM(0x10b7, 0x9051, "3c905-combo", "3Com905-T4", 0),	/* 100 Base T4 / 10 Base Combo */
+/* Newer 90xB revisions: */
+	PCI_ROM(0x10b7, 0x9004, "3c905b-tpo", "3Com900B-TPO", 0),	/* 10 Base TPO */
+	PCI_ROM(0x10b7, 0x9005, "3c905b-combo", "3Com900B-Combo", 0),	/* 10 Base Combo */
+	PCI_ROM(0x10b7, 0x9006, "3c905b-tpb2", "3Com900B-2/T", 0),	/* 10 Base TP and Base2 */
+	PCI_ROM(0x10b7, 0x900a, "3c905b-fl", "3Com900B-FL", 0),	/* 10 Base FL */
+	PCI_ROM(0x10b7, 0x9055, "3c905b-tpo100", "3Com905B-TX", 0),	/* 10/100 TPO */
+	PCI_ROM(0x10b7, 0x9056, "3c905b-t4", "3Com905B-T4", 0),	/* 10/100 T4 */
+	PCI_ROM(0x10b7, 0x9058, "3c905b-9058", "3Com905B-9058", 0),	/* Cyclone 10/100/BNC */
+	PCI_ROM(0x10b7, 0x905a, "3c905b-fx", "3Com905B-FL", 0),	/* 100 Base FX / 10 Base FX */
+/* Newer 90xC revision: */
+	PCI_ROM(0x10b7, 0x9200, "3c905c-tpo", "3Com905C-TXM", 0),	/* 10/100 TPO (3C905C-TXM) */
+	PCI_ROM(0x10b7, 0x9202, "3c920b-emb-ati", "3c920B-EMB-WNM (ATI Radeon 9100 IGP)", 0),	/* 3c920B-EMB-WNM (ATI Radeon 9100 IGP) */
+	PCI_ROM(0x10b7, 0x9210, "3c920b-emb-wnm", "3Com20B-EMB WNM", 0),
+	PCI_ROM(0x10b7, 0x9800, "3c980", "3Com980-Cyclone", 0),	/* Cyclone */
+	PCI_ROM(0x10b7, 0x9805, "3c9805", "3Com9805", 0),	/* Dual Port Server Cyclone */
+	PCI_ROM(0x10b7, 0x7646, "3csoho100-tx", "3CSOHO100-TX", 0),	/* Hurricane */
+	PCI_ROM(0x10b7, 0x4500, "3c450", "3Com450 HomePNA Tornado", 0),
+	PCI_ROM(0x10b7, 0x1201, "3c982a", "3Com982A", 0),
+	PCI_ROM(0x10b7, 0x1202, "3c982b", "3Com982B", 0),
+};
+
+struct pci_driver a3c90x_driver __pci_driver = {
+	.ids = a3c90x_nics,
+	.id_count = (sizeof(a3c90x_nics) / sizeof(a3c90x_nics[0])),
+	.probe = a3c90x_probe,
+	.remove = a3c90x_remove,
+};
+
+/*
+ * Local variables:
+ *  c-basic-offset: 8
+ *  c-indent-level: 8
+ *  tab-width: 8
+ * End:
+ */