Move the tl driver form sys/pci to sys/dev/tl.

1 files changed, 2363 insertions, 0 deletions

diff --git a/sys/dev/tl/if_tl.c b/sys/dev/tl/if_tl.c
new file mode 100644
index 0000000..371feb2
--- /dev/null
+++ b/sys/dev/tl/if_tl.c
@@ -0,0 +1,2363 @@
+/*-
+ * Copyright (c) 1997, 1998
+ *	Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Bill Paul.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+/*
+ * Texas Instruments ThunderLAN driver for FreeBSD 2.2.6 and 3.x.
+ * Supports many Compaq PCI NICs based on the ThunderLAN ethernet controller,
+ * the National Semiconductor DP83840A physical interface and the
+ * Microchip Technology 24Cxx series serial EEPROM.
+ *
+ * Written using the following four documents:
+ *
+ * Texas Instruments ThunderLAN Programmer's Guide (www.ti.com)
+ * National Semiconductor DP83840A data sheet (www.national.com)
+ * Microchip Technology 24C02C data sheet (www.microchip.com)
+ * Micro Linear ML6692 100BaseTX only PHY data sheet (www.microlinear.com)
+ * 
+ * Written by Bill Paul <wpaul@ctr.columbia.edu>
+ * Electrical Engineering Department
+ * Columbia University, New York City
+ */
+/*
+ * Some notes about the ThunderLAN:
+ *
+ * The ThunderLAN controller is a single chip containing PCI controller
+ * logic, approximately 3K of on-board SRAM, a LAN controller, and media
+ * independent interface (MII) bus. The MII allows the ThunderLAN chip to
+ * control up to 32 different physical interfaces (PHYs). The ThunderLAN
+ * also has a built-in 10baseT PHY, allowing a single ThunderLAN controller
+ * to act as a complete ethernet interface.
+ *
+ * Other PHYs may be attached to the ThunderLAN; the Compaq 10/100 cards
+ * use a National Semiconductor DP83840A PHY that supports 10 or 100Mb/sec
+ * in full or half duplex. Some of the Compaq Deskpro machines use a
+ * Level 1 LXT970 PHY with the same capabilities. Certain Olicom adapters
+ * use a Micro Linear ML6692 100BaseTX only PHY, which can be used in
+ * concert with the ThunderLAN's internal PHY to provide full 10/100
+ * support. This is cheaper than using a standalone external PHY for both
+ * 10/100 modes and letting the ThunderLAN's internal PHY go to waste.
+ * A serial EEPROM is also attached to the ThunderLAN chip to provide
+ * power-up default register settings and for storing the adapter's
+ * station address. Although not supported by this driver, the ThunderLAN
+ * chip can also be connected to token ring PHYs.
+ *
+ * The ThunderLAN has a set of registers which can be used to issue
+ * commands, acknowledge interrupts, and to manipulate other internal
+ * registers on its DIO bus. The primary registers can be accessed
+ * using either programmed I/O (inb/outb) or via PCI memory mapping,
+ * depending on how the card is configured during the PCI probing
+ * phase. It is even possible to have both PIO and memory mapped
+ * access turned on at the same time.
+ * 
+ * Frame reception and transmission with the ThunderLAN chip is done
+ * using frame 'lists.' A list structure looks more or less like this:
+ *
+ * struct tl_frag {
+ *	u_int32_t		fragment_address;
+ *	u_int32_t		fragment_size;
+ * };
+ * struct tl_list {
+ *	u_int32_t		forward_pointer;
+ *	u_int16_t		cstat;
+ *	u_int16_t		frame_size;
+ *	struct tl_frag		fragments[10];
+ * };
+ *
+ * The forward pointer in the list header can be either a 0 or the address
+ * of another list, which allows several lists to be linked together. Each
+ * list contains up to 10 fragment descriptors. This means the chip allows
+ * ethernet frames to be broken up into up to 10 chunks for transfer to
+ * and from the SRAM. Note that the forward pointer and fragment buffer
+ * addresses are physical memory addresses, not virtual. Note also that
+ * a single ethernet frame can not span lists: if the host wants to
+ * transmit a frame and the frame data is split up over more than 10
+ * buffers, the frame has to collapsed before it can be transmitted.
+ *
+ * To receive frames, the driver sets up a number of lists and populates
+ * the fragment descriptors, then it sends an RX GO command to the chip.
+ * When a frame is received, the chip will DMA it into the memory regions
+ * specified by the fragment descriptors and then trigger an RX 'end of
+ * frame interrupt' when done. The driver may choose to use only one
+ * fragment per list; this may result is slighltly less efficient use
+ * of memory in exchange for improving performance.
+ *
+ * To transmit frames, the driver again sets up lists and fragment
+ * descriptors, only this time the buffers contain frame data that
+ * is to be DMA'ed into the chip instead of out of it. Once the chip
+ * has transfered the data into its on-board SRAM, it will trigger a
+ * TX 'end of frame' interrupt. It will also generate an 'end of channel'
+ * interrupt when it reaches the end of the list.
+ */
+/*
+ * Some notes about this driver:
+ *
+ * The ThunderLAN chip provides a couple of different ways to organize
+ * reception, transmission and interrupt handling. The simplest approach
+ * is to use one list each for transmission and reception. In this mode,
+ * the ThunderLAN will generate two interrupts for every received frame
+ * (one RX EOF and one RX EOC) and two for each transmitted frame (one
+ * TX EOF and one TX EOC). This may make the driver simpler but it hurts
+ * performance to have to handle so many interrupts.
+ *
+ * Initially I wanted to create a circular list of receive buffers so
+ * that the ThunderLAN chip would think there was an infinitely long
+ * receive channel and never deliver an RXEOC interrupt. However this
+ * doesn't work correctly under heavy load: while the manual says the
+ * chip will trigger an RXEOF interrupt each time a frame is copied into
+ * memory, you can't count on the chip waiting around for you to acknowledge
+ * the interrupt before it starts trying to DMA the next frame. The result
+ * is that the chip might traverse the entire circular list and then wrap
+ * around before you have a chance to do anything about it. Consequently,
+ * the receive list is terminated (with a 0 in the forward pointer in the
+ * last element). Each time an RXEOF interrupt arrives, the used list
+ * is shifted to the end of the list. This gives the appearance of an
+ * infinitely large RX chain so long as the driver doesn't fall behind
+ * the chip and allow all of the lists to be filled up.
+ *
+ * If all the lists are filled, the adapter will deliver an RX 'end of
+ * channel' interrupt when it hits the 0 forward pointer at the end of
+ * the chain. The RXEOC handler then cleans out the RX chain and resets
+ * the list head pointer in the ch_parm register and restarts the receiver.
+ *
+ * For frame transmission, it is possible to program the ThunderLAN's
+ * transmit interrupt threshold so that the chip can acknowledge multiple
+ * lists with only a single TX EOF interrupt. This allows the driver to
+ * queue several frames in one shot, and only have to handle a total
+ * two interrupts (one TX EOF and one TX EOC) no matter how many frames
+ * are transmitted. Frame transmission is done directly out of the
+ * mbufs passed to the tl_start() routine via the interface send queue.
+ * The driver simply sets up the fragment descriptors in the transmit
+ * lists to point to the mbuf data regions and sends a TX GO command.
+ *
+ * Note that since the RX and TX lists themselves are always used
+ * only by the driver, the are malloc()ed once at driver initialization
+ * time and never free()ed.
+ *
+ * Also, in order to remain as platform independent as possible, this
+ * driver uses memory mapped register access to manipulate the card
+ * as opposed to programmed I/O. This avoids the use of the inb/outb
+ * (and related) instructions which are specific to the i386 platform.
+ *
+ * Using these techniques, this driver achieves very high performance
+ * by minimizing the amount of interrupts generated during large
+ * transfers and by completely avoiding buffer copies. Frame transfer
+ * to and from the ThunderLAN chip is performed entirely by the chip
+ * itself thereby reducing the load on the host CPU.
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/sockio.h>
+#include <sys/mbuf.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/socket.h>
+
+#include <net/if.h>
+#include <net/if_arp.h>
+#include <net/ethernet.h>
+#include <net/if_dl.h>
+#include <net/if_media.h>
+#include <net/if_types.h>
+
+#include <net/bpf.h>
+
+#include <vm/vm.h>              /* for vtophys */
+#include <vm/pmap.h>            /* for vtophys */
+#include <machine/bus.h>
+#include <machine/resource.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+
+/*
+ * Default to using PIO register access mode to pacify certain
+ * laptop docking stations with built-in ThunderLAN chips that
+ * don't seem to handle memory mapped mode properly.
+ */
+#define TL_USEIOSPACE
+
+#include <dev/tl/if_tlreg.h>
+
+MODULE_DEPEND(tl, pci, 1, 1, 1);
+MODULE_DEPEND(tl, ether, 1, 1, 1);
+MODULE_DEPEND(tl, miibus, 1, 1, 1);
+
+/* "device miibus" required.  See GENERIC if you get errors here. */
+#include "miibus_if.h"
+
+/*
+ * Various supported device vendors/types and their names.
+ */
+
+static struct tl_type tl_devs[] = {
+	{ TI_VENDORID,	TI_DEVICEID_THUNDERLAN,
+		"Texas Instruments ThunderLAN" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10,
+		"Compaq Netelligent 10" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100,
+		"Compaq Netelligent 10/100" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_PROLIANT,
+		"Compaq Netelligent 10/100 Proliant" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_DUAL,
+		"Compaq Netelligent 10/100 Dual Port" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P_INTEGRATED,
+		"Compaq NetFlex-3/P Integrated" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P,
+		"Compaq NetFlex-3/P" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETFLEX_3P_BNC,
+		"Compaq NetFlex 3/P w/ BNC" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_EMBEDDED,
+		"Compaq Netelligent 10/100 TX Embedded UTP" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_T2_UTP_COAX,
+		"Compaq Netelligent 10 T/2 PCI UTP/Coax" },
+	{ COMPAQ_VENDORID, COMPAQ_DEVICEID_NETEL_10_100_TX_UTP,
+		"Compaq Netelligent 10/100 TX UTP" },
+	{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2183,
+		"Olicom OC-2183/2185" },
+	{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2325,
+		"Olicom OC-2325" },
+	{ OLICOM_VENDORID, OLICOM_DEVICEID_OC2326,
+		"Olicom OC-2326 10/100 TX UTP" },
+	{ 0, 0, NULL }
+};
+
+static int tl_probe(device_t);
+static int tl_attach(device_t);
+static int tl_detach(device_t);
+static int tl_intvec_rxeoc(void *, u_int32_t);
+static int tl_intvec_txeoc(void *, u_int32_t);
+static int tl_intvec_txeof(void *, u_int32_t);
+static int tl_intvec_rxeof(void *, u_int32_t);
+static int tl_intvec_adchk(void *, u_int32_t);
+static int tl_intvec_netsts(void *, u_int32_t);
+
+static int tl_newbuf(struct tl_softc *, struct tl_chain_onefrag *);
+static void tl_stats_update(void *);
+static int tl_encap(struct tl_softc *, struct tl_chain *, struct mbuf *);
+
+static void tl_intr(void *);
+static void tl_start(struct ifnet *);
+static void tl_start_locked(struct ifnet *);
+static int tl_ioctl(struct ifnet *, u_long, caddr_t);
+static void tl_init(void *);
+static void tl_init_locked(struct tl_softc *);
+static void tl_stop(struct tl_softc *);
+static void tl_watchdog(struct ifnet *);
+static void tl_shutdown(device_t);
+static int tl_ifmedia_upd(struct ifnet *);
+static void tl_ifmedia_sts(struct ifnet *, struct ifmediareq *);
+
+static u_int8_t tl_eeprom_putbyte(struct tl_softc *, int);
+static u_int8_t	tl_eeprom_getbyte(struct tl_softc *, int, u_int8_t *);
+static int tl_read_eeprom(struct tl_softc *, caddr_t, int, int);
+
+static void tl_mii_sync(struct tl_softc *);
+static void tl_mii_send(struct tl_softc *, u_int32_t, int);
+static int tl_mii_readreg(struct tl_softc *, struct tl_mii_frame *);
+static int tl_mii_writereg(struct tl_softc *, struct tl_mii_frame *);
+static int tl_miibus_readreg(device_t, int, int);
+static int tl_miibus_writereg(device_t, int, int, int);
+static void tl_miibus_statchg(device_t);
+
+static void tl_setmode(struct tl_softc *, int);
+static uint32_t tl_mchash(const uint8_t *);
+static void tl_setmulti(struct tl_softc *);
+static void tl_setfilt(struct tl_softc *, caddr_t, int);
+static void tl_softreset(struct tl_softc *, int);
+static void tl_hardreset(device_t);
+static int tl_list_rx_init(struct tl_softc *);
+static int tl_list_tx_init(struct tl_softc *);
+
+static u_int8_t tl_dio_read8(struct tl_softc *, int);
+static u_int16_t tl_dio_read16(struct tl_softc *, int);
+static u_int32_t tl_dio_read32(struct tl_softc *, int);
+static void tl_dio_write8(struct tl_softc *, int, int);
+static void tl_dio_write16(struct tl_softc *, int, int);
+static void tl_dio_write32(struct tl_softc *, int, int);
+static void tl_dio_setbit(struct tl_softc *, int, int);
+static void tl_dio_clrbit(struct tl_softc *, int, int);
+static void tl_dio_setbit16(struct tl_softc *, int, int);
+static void tl_dio_clrbit16(struct tl_softc *, int, int);
+
+#ifdef TL_USEIOSPACE
+#define TL_RES		SYS_RES_IOPORT
+#define TL_RID		TL_PCI_LOIO
+#else
+#define TL_RES		SYS_RES_MEMORY
+#define TL_RID		TL_PCI_LOMEM
+#endif
+
+static device_method_t tl_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_probe,		tl_probe),
+	DEVMETHOD(device_attach,	tl_attach),
+	DEVMETHOD(device_detach,	tl_detach),
+	DEVMETHOD(device_shutdown,	tl_shutdown),
+
+	/* bus interface */
+	DEVMETHOD(bus_print_child,	bus_generic_print_child),
+	DEVMETHOD(bus_driver_added,	bus_generic_driver_added),
+
+	/* MII interface */
+	DEVMETHOD(miibus_readreg,	tl_miibus_readreg),
+	DEVMETHOD(miibus_writereg,	tl_miibus_writereg),
+	DEVMETHOD(miibus_statchg,	tl_miibus_statchg),
+
+	{ 0, 0 }
+};
+
+static driver_t tl_driver = {
+	"tl",
+	tl_methods,
+	sizeof(struct tl_softc)
+};
+
+static devclass_t tl_devclass;
+
+DRIVER_MODULE(tl, pci, tl_driver, tl_devclass, 0, 0);
+DRIVER_MODULE(miibus, tl, miibus_driver, miibus_devclass, 0, 0);
+
+static u_int8_t tl_dio_read8(sc, reg)
+	struct tl_softc		*sc;
+	int			reg;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	return(CSR_READ_1(sc, TL_DIO_DATA + (reg & 3)));
+}
+
+static u_int16_t tl_dio_read16(sc, reg)
+	struct tl_softc		*sc;
+	int			reg;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	return(CSR_READ_2(sc, TL_DIO_DATA + (reg & 3)));
+}
+
+static u_int32_t tl_dio_read32(sc, reg)
+	struct tl_softc		*sc;
+	int			reg;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	return(CSR_READ_4(sc, TL_DIO_DATA + (reg & 3)));
+}
+
+static void tl_dio_write8(sc, reg, val)
+	struct tl_softc		*sc;
+	int			reg;
+	int			val;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), val);
+	return;
+}
+
+static void tl_dio_write16(sc, reg, val)
+	struct tl_softc		*sc;
+	int			reg;
+	int			val;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), val);
+	return;
+}
+
+static void tl_dio_write32(sc, reg, val)
+	struct tl_softc		*sc;
+	int			reg;
+	int			val;
+{
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	CSR_WRITE_4(sc, TL_DIO_DATA + (reg & 3), val);
+	return;
+}
+
+static void
+tl_dio_setbit(sc, reg, bit)
+	struct tl_softc		*sc;
+	int			reg;
+	int			bit;
+{
+	u_int8_t			f;
+
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	f = CSR_READ_1(sc, TL_DIO_DATA + (reg & 3));
+	f |= bit;
+	CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), f);
+
+	return;
+}
+
+static void
+tl_dio_clrbit(sc, reg, bit)
+	struct tl_softc		*sc;
+	int			reg;
+	int			bit;
+{
+	u_int8_t			f;
+
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	f = CSR_READ_1(sc, TL_DIO_DATA + (reg & 3));
+	f &= ~bit;
+	CSR_WRITE_1(sc, TL_DIO_DATA + (reg & 3), f);
+
+	return;
+}
+
+static void tl_dio_setbit16(sc, reg, bit)
+	struct tl_softc		*sc;
+	int			reg;
+	int			bit;
+{
+	u_int16_t			f;
+
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	f = CSR_READ_2(sc, TL_DIO_DATA + (reg & 3));
+	f |= bit;
+	CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), f);
+
+	return;
+}
+
+static void tl_dio_clrbit16(sc, reg, bit)
+	struct tl_softc		*sc;
+	int			reg;
+	int			bit;
+{
+	u_int16_t			f;
+
+	CSR_WRITE_2(sc, TL_DIO_ADDR, reg);
+	f = CSR_READ_2(sc, TL_DIO_DATA + (reg & 3));
+	f &= ~bit;
+	CSR_WRITE_2(sc, TL_DIO_DATA + (reg & 3), f);
+
+	return;
+}
+
+/*
+ * Send an instruction or address to the EEPROM, check for ACK.
+ */
+static u_int8_t tl_eeprom_putbyte(sc, byte)
+	struct tl_softc		*sc;
+	int			byte;
+{
+	register int		i, ack = 0;
+
+	/*
+	 * Make sure we're in TX mode.
+	 */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ETXEN);
+
+	/*
+	 * Feed in each bit and stobe the clock.
+	 */
+	for (i = 0x80; i; i >>= 1) {
+		if (byte & i) {
+			tl_dio_setbit(sc, TL_NETSIO, TL_SIO_EDATA);
+		} else {
+			tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_EDATA);
+		}
+		DELAY(1);
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+		DELAY(1);
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+	}
+
+	/*
+	 * Turn off TX mode.
+	 */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN);
+
+	/*
+	 * Check for ack.
+	 */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+	ack = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_EDATA;
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+
+	return(ack);
+}
+
+/*
+ * Read a byte of data stored in the EEPROM at address 'addr.'
+ */
+static u_int8_t tl_eeprom_getbyte(sc, addr, dest)
+	struct tl_softc		*sc;
+	int			addr;
+	u_int8_t		*dest;
+{
+	register int		i;
+	u_int8_t		byte = 0;
+	device_t		tl_dev = sc->tl_dev;
+
+	tl_dio_write8(sc, TL_NETSIO, 0);
+
+	EEPROM_START;
+
+	/*
+	 * Send write control code to EEPROM.
+	 */
+	if (tl_eeprom_putbyte(sc, EEPROM_CTL_WRITE)) {
+		device_printf(tl_dev, "failed to send write command, status: %x\n",
+		    tl_dio_read8(sc, TL_NETSIO));
+		return(1);
+	}
+
+	/*
+	 * Send address of byte we want to read.
+	 */
+	if (tl_eeprom_putbyte(sc, addr)) {
+		device_printf(tl_dev, "failed to send address, status: %x\n",
+		    tl_dio_read8(sc, TL_NETSIO));
+		return(1);
+	}
+
+	EEPROM_STOP;
+	EEPROM_START;
+	/*
+	 * Send read control code to EEPROM.
+	 */
+	if (tl_eeprom_putbyte(sc, EEPROM_CTL_READ)) {
+		device_printf(tl_dev, "failed to send write command, status: %x\n",
+		    tl_dio_read8(sc, TL_NETSIO));
+		return(1);
+	}
+
+	/*
+	 * Start reading bits from EEPROM.
+	 */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ETXEN);
+	for (i = 0x80; i; i >>= 1) {
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+		DELAY(1);
+		if (tl_dio_read8(sc, TL_NETSIO) & TL_SIO_EDATA)
+			byte |= i;
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_ECLOK);
+		DELAY(1);
+	}
+
+	EEPROM_STOP;
+
+	/*
+	 * No ACK generated for read, so just return byte.
+	 */
+
+	*dest = byte;
+
+	return(0);
+}
+
+/*
+ * Read a sequence of bytes from the EEPROM.
+ */
+static int
+tl_read_eeprom(sc, dest, off, cnt)
+	struct tl_softc		*sc;
+	caddr_t			dest;
+	int			off;
+	int			cnt;
+{
+	int			err = 0, i;
+	u_int8_t		byte = 0;
+
+	for (i = 0; i < cnt; i++) {
+		err = tl_eeprom_getbyte(sc, off + i, &byte);
+		if (err)
+			break;
+		*(dest + i) = byte;
+	}
+
+	return(err ? 1 : 0);
+}
+
+static void
+tl_mii_sync(sc)
+	struct tl_softc		*sc;
+{
+	register int		i;
+
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
+
+	for (i = 0; i < 32; i++) {
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	}
+
+	return;
+}
+
+static void
+tl_mii_send(sc, bits, cnt)
+	struct tl_softc		*sc;
+	u_int32_t		bits;
+	int			cnt;
+{
+	int			i;
+
+	for (i = (0x1 << (cnt - 1)); i; i >>= 1) {
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+		if (bits & i) {
+			tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MDATA);
+		} else {
+			tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MDATA);
+		}
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	}
+}
+
+static int
+tl_mii_readreg(sc, frame)
+	struct tl_softc		*sc;
+	struct tl_mii_frame	*frame;
+	
+{
+	int			i, ack;
+	int			minten = 0;
+
+	tl_mii_sync(sc);
+
+	/*
+	 * Set up frame for RX.
+	 */
+	frame->mii_stdelim = TL_MII_STARTDELIM;
+	frame->mii_opcode = TL_MII_READOP;
+	frame->mii_turnaround = 0;
+	frame->mii_data = 0;
+	
+	/*
+	 * Turn off MII interrupt by forcing MINTEN low.
+	 */
+	minten = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MINTEN;
+	if (minten) {
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MINTEN);
+	}
+
+	/*
+ 	 * Turn on data xmit.
+	 */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MTXEN);
+
+	/*
+	 * Send command/address info.
+	 */
+	tl_mii_send(sc, frame->mii_stdelim, 2);
+	tl_mii_send(sc, frame->mii_opcode, 2);
+	tl_mii_send(sc, frame->mii_phyaddr, 5);
+	tl_mii_send(sc, frame->mii_regaddr, 5);
+
+	/*
+	 * Turn off xmit.
+	 */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
+
+	/* Idle bit */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+
+	/* Check for ack */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	ack = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MDATA;
+
+	/* Complete the cycle */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+
+	/*
+	 * Now try reading data bits. If the ack failed, we still
+	 * need to clock through 16 cycles to keep the PHYs in sync.
+	 */
+	if (ack) {
+		for(i = 0; i < 16; i++) {
+			tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+			tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+		}
+		goto fail;
+	}
+
+	for (i = 0x8000; i; i >>= 1) {
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+		if (!ack) {
+			if (tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MDATA)
+				frame->mii_data |= i;
+		}
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	}
+
+fail:
+
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+
+	/* Reenable interrupts */
+	if (minten) {
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
+	}
+
+	if (ack)
+		return(1);
+	return(0);
+}
+
+static int
+tl_mii_writereg(sc, frame)
+	struct tl_softc		*sc;
+	struct tl_mii_frame	*frame;
+	
+{
+	int			minten;
+
+	tl_mii_sync(sc);
+
+	/*
+	 * Set up frame for TX.
+	 */
+
+	frame->mii_stdelim = TL_MII_STARTDELIM;
+	frame->mii_opcode = TL_MII_WRITEOP;
+	frame->mii_turnaround = TL_MII_TURNAROUND;
+	
+	/*
+	 * Turn off MII interrupt by forcing MINTEN low.
+	 */
+	minten = tl_dio_read8(sc, TL_NETSIO) & TL_SIO_MINTEN;
+	if (minten) {
+		tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MINTEN);
+	}
+
+	/*
+ 	 * Turn on data output.
+	 */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MTXEN);
+
+	tl_mii_send(sc, frame->mii_stdelim, 2);
+	tl_mii_send(sc, frame->mii_opcode, 2);
+	tl_mii_send(sc, frame->mii_phyaddr, 5);
+	tl_mii_send(sc, frame->mii_regaddr, 5);
+	tl_mii_send(sc, frame->mii_turnaround, 2);
+	tl_mii_send(sc, frame->mii_data, 16);
+
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MCLK);
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MCLK);
+
+	/*
+	 * Turn off xmit.
+	 */
+	tl_dio_clrbit(sc, TL_NETSIO, TL_SIO_MTXEN);
+
+	/* Reenable interrupts */
+	if (minten)
+		tl_dio_setbit(sc, TL_NETSIO, TL_SIO_MINTEN);
+
+	return(0);
+}
+
+static int
+tl_miibus_readreg(dev, phy, reg)
+	device_t		dev;
+	int			phy, reg;
+{
+	struct tl_softc		*sc;
+	struct tl_mii_frame	frame;
+
+	sc = device_get_softc(dev);
+	bzero((char *)&frame, sizeof(frame));
+
+	frame.mii_phyaddr = phy;
+	frame.mii_regaddr = reg;
+	tl_mii_readreg(sc, &frame);
+
+	return(frame.mii_data);
+}
+
+static int
+tl_miibus_writereg(dev, phy, reg, data)
+	device_t		dev;
+	int			phy, reg, data;
+{
+	struct tl_softc		*sc;
+	struct tl_mii_frame	frame;
+
+	sc = device_get_softc(dev);
+	bzero((char *)&frame, sizeof(frame));
+
+	frame.mii_phyaddr = phy;
+	frame.mii_regaddr = reg;
+	frame.mii_data = data;
+
+	tl_mii_writereg(sc, &frame);
+
+	return(0);
+}
+
+static void
+tl_miibus_statchg(dev)
+	device_t		dev;
+{
+	struct tl_softc		*sc;
+	struct mii_data		*mii;
+
+	sc = device_get_softc(dev);
+	mii = device_get_softc(sc->tl_miibus);
+
+	if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX) {
+		tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
+	} else {
+		tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
+	}
+
+	return;
+}
+
+/*
+ * Set modes for bitrate devices.
+ */
+static void
+tl_setmode(sc, media)
+	struct tl_softc		*sc;
+	int			media;
+{
+	if (IFM_SUBTYPE(media) == IFM_10_5)
+		tl_dio_setbit(sc, TL_ACOMMIT, TL_AC_MTXD1);
+	if (IFM_SUBTYPE(media) == IFM_10_T) {
+		tl_dio_clrbit(sc, TL_ACOMMIT, TL_AC_MTXD1);
+		if ((media & IFM_GMASK) == IFM_FDX) {
+			tl_dio_clrbit(sc, TL_ACOMMIT, TL_AC_MTXD3);
+			tl_dio_setbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
+		} else {
+			tl_dio_setbit(sc, TL_ACOMMIT, TL_AC_MTXD3);
+			tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_DUPLEX);
+		}
+	}
+
+	return;
+}
+
+/*
+ * Calculate the hash of a MAC address for programming the multicast hash
+ * table.  This hash is simply the address split into 6-bit chunks
+ * XOR'd, e.g.
+ * byte: 000000|00 1111|1111 22|222222|333333|33 4444|4444 55|555555
+ * bit:  765432|10 7654|3210 76|543210|765432|10 7654|3210 76|543210
+ * Bytes 0-2 and 3-5 are symmetrical, so are folded together.  Then
+ * the folded 24-bit value is split into 6-bit portions and XOR'd.
+ */
+static uint32_t
+tl_mchash(addr)
+	const uint8_t *addr;
+{
+	int t;
+
+	t = (addr[0] ^ addr[3]) << 16 | (addr[1] ^ addr[4]) << 8 |
+		(addr[2] ^ addr[5]);
+	return ((t >> 18) ^ (t >> 12) ^ (t >> 6) ^ t) & 0x3f;
+}
+
+/*
+ * The ThunderLAN has a perfect MAC address filter in addition to
+ * the multicast hash filter. The perfect filter can be programmed
+ * with up to four MAC addresses. The first one is always used to
+ * hold the station address, which leaves us free to use the other
+ * three for multicast addresses.
+ */
+static void
+tl_setfilt(sc, addr, slot)
+	struct tl_softc		*sc;
+	caddr_t			addr;
+	int			slot;
+{
+	int			i;
+	u_int16_t		regaddr;
+
+	regaddr = TL_AREG0_B5 + (slot * ETHER_ADDR_LEN);
+
+	for (i = 0; i < ETHER_ADDR_LEN; i++)
+		tl_dio_write8(sc, regaddr + i, *(addr + i));
+
+	return;
+}
+
+/*
+ * XXX In FreeBSD 3.0, multicast addresses are managed using a doubly
+ * linked list. This is fine, except addresses are added from the head
+ * end of the list. We want to arrange for 224.0.0.1 (the "all hosts")
+ * group to always be in the perfect filter, but as more groups are added,
+ * the 224.0.0.1 entry (which is always added first) gets pushed down
+ * the list and ends up at the tail. So after 3 or 4 multicast groups
+ * are added, the all-hosts entry gets pushed out of the perfect filter
+ * and into the hash table.
+ *
+ * Because the multicast list is a doubly-linked list as opposed to a
+ * circular queue, we don't have the ability to just grab the tail of
+ * the list and traverse it backwards. Instead, we have to traverse
+ * the list once to find the tail, then traverse it again backwards to
+ * update the multicast filter.
+ */
+static void
+tl_setmulti(sc)
+	struct tl_softc		*sc;
+{
+	struct ifnet		*ifp;
+	u_int32_t		hashes[2] = { 0, 0 };
+	int			h, i;
+	struct ifmultiaddr	*ifma;
+	u_int8_t		dummy[] = { 0, 0, 0, 0, 0 ,0 };
+	ifp = sc->tl_ifp;
+
+	/* First, zot all the existing filters. */
+	for (i = 1; i < 4; i++)
+		tl_setfilt(sc, (caddr_t)&dummy, i);
+	tl_dio_write32(sc, TL_HASH1, 0);
+	tl_dio_write32(sc, TL_HASH2, 0);
+
+	/* Now program new ones. */
+	if (ifp->if_flags & IFF_ALLMULTI) {
+		hashes[0] = 0xFFFFFFFF;
+		hashes[1] = 0xFFFFFFFF;
+	} else {
+		i = 1;
+		IF_ADDR_LOCK(ifp);
+		TAILQ_FOREACH_REVERSE(ifma, &ifp->if_multiaddrs, ifmultihead, ifma_link) {
+			if (ifma->ifma_addr->sa_family != AF_LINK)
+				continue;
+			/*
+			 * Program the first three multicast groups
+			 * into the perfect filter. For all others,
+			 * use the hash table.
+			 */
+			if (i < 4) {
+				tl_setfilt(sc,
+			LLADDR((struct sockaddr_dl *)ifma->ifma_addr), i);
+				i++;
+				continue;
+			}
+
+			h = tl_mchash(
+				LLADDR((struct sockaddr_dl *)ifma->ifma_addr));
+			if (h < 32)
+				hashes[0] |= (1 << h);
+			else
+				hashes[1] |= (1 << (h - 32));
+		}
+		IF_ADDR_UNLOCK(ifp);
+	}
+
+	tl_dio_write32(sc, TL_HASH1, hashes[0]);
+	tl_dio_write32(sc, TL_HASH2, hashes[1]);
+
+	return;
+}
+
+/*
+ * This routine is recommended by the ThunderLAN manual to insure that
+ * the internal PHY is powered up correctly. It also recommends a one
+ * second pause at the end to 'wait for the clocks to start' but in my
+ * experience this isn't necessary.
+ */
+static void
+tl_hardreset(dev)
+	device_t		dev;
+{
+	struct tl_softc		*sc;
+	int			i;
+	u_int16_t		flags;
+
+	sc = device_get_softc(dev);
+
+	tl_mii_sync(sc);
+
+	flags = BMCR_LOOP|BMCR_ISO|BMCR_PDOWN;
+
+	for (i = 0; i < MII_NPHY; i++)
+		tl_miibus_writereg(dev, i, MII_BMCR, flags);
+
+	tl_miibus_writereg(dev, 31, MII_BMCR, BMCR_ISO);
+	DELAY(50000);
+	tl_miibus_writereg(dev, 31, MII_BMCR, BMCR_LOOP|BMCR_ISO);
+	tl_mii_sync(sc);
+	while(tl_miibus_readreg(dev, 31, MII_BMCR) & BMCR_RESET);
+
+	DELAY(50000);
+	return;
+}
+
+static void
+tl_softreset(sc, internal)
+	struct tl_softc		*sc;
+	int			internal;
+{
+        u_int32_t               cmd, dummy, i;
+
+        /* Assert the adapter reset bit. */
+	CMD_SET(sc, TL_CMD_ADRST);
+
+        /* Turn off interrupts */
+	CMD_SET(sc, TL_CMD_INTSOFF);
+
+	/* First, clear the stats registers. */
+	for (i = 0; i < 5; i++)
+		dummy = tl_dio_read32(sc, TL_TXGOODFRAMES);
+
+        /* Clear Areg and Hash registers */
+	for (i = 0; i < 8; i++)
+		tl_dio_write32(sc, TL_AREG0_B5, 0x00000000);
+
+        /*
+	 * Set up Netconfig register. Enable one channel and
+	 * one fragment mode.
+	 */
+	tl_dio_setbit16(sc, TL_NETCONFIG, TL_CFG_ONECHAN|TL_CFG_ONEFRAG);
+	if (internal && !sc->tl_bitrate) {
+		tl_dio_setbit16(sc, TL_NETCONFIG, TL_CFG_PHYEN);
+	} else {
+		tl_dio_clrbit16(sc, TL_NETCONFIG, TL_CFG_PHYEN);
+	}
+
+	/* Handle cards with bitrate devices. */
+	if (sc->tl_bitrate)
+		tl_dio_setbit16(sc, TL_NETCONFIG, TL_CFG_BITRATE);
+
+	/*
+	 * Load adapter irq pacing timer and tx threshold.
+	 * We make the transmit threshold 1 initially but we may
+	 * change that later.
+	 */
+	cmd = CSR_READ_4(sc, TL_HOSTCMD);
+	cmd |= TL_CMD_NES;
+	cmd &= ~(TL_CMD_RT|TL_CMD_EOC|TL_CMD_ACK_MASK|TL_CMD_CHSEL_MASK);
+	CMD_PUT(sc, cmd | (TL_CMD_LDTHR | TX_THR));
+	CMD_PUT(sc, cmd | (TL_CMD_LDTMR | 0x00000003));
+
+        /* Unreset the MII */
+	tl_dio_setbit(sc, TL_NETSIO, TL_SIO_NMRST);
+
+	/* Take the adapter out of reset */
+	tl_dio_setbit(sc, TL_NETCMD, TL_CMD_NRESET|TL_CMD_NWRAP);
+
+	/* Wait for things to settle down a little. */
+	DELAY(500);
+
+        return;
+}
+
+/*
+ * Probe for a ThunderLAN chip. Check the PCI vendor and device IDs
+ * against our list and return its name if we find a match.
+ */
+static int
+tl_probe(dev)
+	device_t		dev;
+{
+	struct tl_type		*t;
+
+	t = tl_devs;
+
+	while(t->tl_name != NULL) {
+		if ((pci_get_vendor(dev) == t->tl_vid) &&
+		    (pci_get_device(dev) == t->tl_did)) {
+			device_set_desc(dev, t->tl_name);
+			return (BUS_PROBE_DEFAULT);
+		}
+		t++;
+	}
+
+	return(ENXIO);
+}
+
+static int
+tl_attach(dev)
+	device_t		dev;
+{
+	int			i;
+	u_int16_t		did, vid;
+	struct tl_type		*t;
+	struct ifnet		*ifp;
+	struct tl_softc		*sc;
+	int			unit, error = 0, rid;
+	u_char			eaddr[6];
+
+	vid = pci_get_vendor(dev);
+	did = pci_get_device(dev);
+	sc = device_get_softc(dev);
+	sc->tl_dev = dev;
+	unit = device_get_unit(dev);
+
+	t = tl_devs;
+	while(t->tl_name != NULL) {
+		if (vid == t->tl_vid && did == t->tl_did)
+			break;
+		t++;
+	}
+
+	if (t->tl_name == NULL) {
+		device_printf(dev, "unknown device!?\n");
+		return (ENXIO);
+	}
+
+	mtx_init(&sc->tl_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
+	    MTX_DEF);
+
+	/*
+	 * Map control/status registers.
+	 */
+	pci_enable_busmaster(dev);
+
+#ifdef TL_USEIOSPACE
+
+	rid = TL_PCI_LOIO;
+	sc->tl_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
+		RF_ACTIVE);
+
+	/*
+	 * Some cards have the I/O and memory mapped address registers
+	 * reversed. Try both combinations before giving up.
+	 */
+	if (sc->tl_res == NULL) {
+		rid = TL_PCI_LOMEM;
+		sc->tl_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
+		    RF_ACTIVE);
+	}
+#else
+	rid = TL_PCI_LOMEM;
+	sc->tl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+	    RF_ACTIVE);
+	if (sc->tl_res == NULL) {
+		rid = TL_PCI_LOIO;
+		sc->tl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
+		    RF_ACTIVE);
+	}
+#endif
+
+	if (sc->tl_res == NULL) {
+		device_printf(dev, "couldn't map ports/memory\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	sc->tl_btag = rman_get_bustag(sc->tl_res);
+	sc->tl_bhandle = rman_get_bushandle(sc->tl_res);
+
+#ifdef notdef
+	/*
+	 * The ThunderLAN manual suggests jacking the PCI latency
+	 * timer all the way up to its maximum value. I'm not sure
+	 * if this is really necessary, but what the manual wants,
+	 * the manual gets.
+	 */
+	command = pci_read_config(dev, TL_PCI_LATENCY_TIMER, 4);
+	command |= 0x0000FF00;
+	pci_write_config(dev, TL_PCI_LATENCY_TIMER, command, 4);
+#endif
+
+	/* Allocate interrupt */
+	rid = 0;
+	sc->tl_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
+	    RF_SHAREABLE | RF_ACTIVE);
+
+	if (sc->tl_irq == NULL) {
+		device_printf(dev, "couldn't map interrupt\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	/*
+	 * Now allocate memory for the TX and RX lists.
+	 */
+	sc->tl_ldata = contigmalloc(sizeof(struct tl_list_data), M_DEVBUF,
+	    M_NOWAIT, 0, 0xffffffff, PAGE_SIZE, 0);
+
+	if (sc->tl_ldata == NULL) {
+		device_printf(dev, "no memory for list buffers!\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+	bzero(sc->tl_ldata, sizeof(struct tl_list_data));
+
+	sc->tl_dinfo = t;
+	if (t->tl_vid == COMPAQ_VENDORID || t->tl_vid == TI_VENDORID)
+		sc->tl_eeaddr = TL_EEPROM_EADDR;
+	if (t->tl_vid == OLICOM_VENDORID)
+		sc->tl_eeaddr = TL_EEPROM_EADDR_OC;
+
+	/* Reset the adapter. */
+	tl_softreset(sc, 1);
+	tl_hardreset(dev);
+	tl_softreset(sc, 1);
+
+	/*
+	 * Get station address from the EEPROM.
+	 */
+	if (tl_read_eeprom(sc, eaddr, sc->tl_eeaddr, ETHER_ADDR_LEN)) {
+		device_printf(dev, "failed to read station address\n");
+		error = ENXIO;
+		goto fail;
+	}
+
+        /*
+         * XXX Olicom, in its desire to be different from the
+         * rest of the world, has done strange things with the
+         * encoding of the station address in the EEPROM. First
+         * of all, they store the address at offset 0xF8 rather
+         * than at 0x83 like the ThunderLAN manual suggests.
+         * Second, they store the address in three 16-bit words in
+         * network byte order, as opposed to storing it sequentially
+         * like all the other ThunderLAN cards. In order to get
+         * the station address in a form that matches what the Olicom
+         * diagnostic utility specifies, we have to byte-swap each
+         * word. To make things even more confusing, neither 00:00:28
+         * nor 00:00:24 appear in the IEEE OUI database.
+         */
+        if (sc->tl_dinfo->tl_vid == OLICOM_VENDORID) {
+                for (i = 0; i < ETHER_ADDR_LEN; i += 2) {
+                        u_int16_t               *p;
+                        p = (u_int16_t *)&eaddr[i];
+                        *p = ntohs(*p);
+                }
+        }
+
+	ifp = sc->tl_ifp = if_alloc(IFT_ETHER);
+	if (ifp == NULL) {
+		device_printf(dev, "can not if_alloc()\n");
+		error = ENOSPC;
+		goto fail;
+	}
+	ifp->if_softc = sc;
+	if_initname(ifp, device_get_name(dev), device_get_unit(dev));
+	ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+	ifp->if_ioctl = tl_ioctl;
+	ifp->if_start = tl_start;
+	ifp->if_watchdog = tl_watchdog;
+	ifp->if_init = tl_init;
+	ifp->if_mtu = ETHERMTU;
+	ifp->if_snd.ifq_maxlen = TL_TX_LIST_CNT - 1;
+	ifp->if_capabilities |= IFCAP_VLAN_MTU;
+	ifp->if_capenable |= IFCAP_VLAN_MTU;
+	callout_init_mtx(&sc->tl_stat_callout, &sc->tl_mtx, 0);
+
+	/* Reset the adapter again. */
+	tl_softreset(sc, 1);
+	tl_hardreset(dev);
+	tl_softreset(sc, 1);
+
+	/*
+	 * Do MII setup. If no PHYs are found, then this is a
+	 * bitrate ThunderLAN chip that only supports 10baseT
+	 * and AUI/BNC.
+	 */
+	if (mii_phy_probe(dev, &sc->tl_miibus,
+	    tl_ifmedia_upd, tl_ifmedia_sts)) {
+		struct ifmedia		*ifm;
+		sc->tl_bitrate = 1;
+		ifmedia_init(&sc->ifmedia, 0, tl_ifmedia_upd, tl_ifmedia_sts);
+		ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T, 0, NULL);
+		ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_HDX, 0, NULL);
+		ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_T|IFM_FDX, 0, NULL);
+		ifmedia_add(&sc->ifmedia, IFM_ETHER|IFM_10_5, 0, NULL);
+		ifmedia_set(&sc->ifmedia, IFM_ETHER|IFM_10_T);
+		/* Reset again, this time setting bitrate mode. */
+		tl_softreset(sc, 1);
+		ifm = &sc->ifmedia;
+		ifm->ifm_media = ifm->ifm_cur->ifm_media;
+		tl_ifmedia_upd(ifp);
+	}
+
+	/*
+	 * Call MI attach routine.
+	 */
+	ether_ifattach(ifp, eaddr);
+
+	/* Hook interrupt last to avoid having to lock softc */
+	error = bus_setup_intr(dev, sc->tl_irq, INTR_TYPE_NET | INTR_MPSAFE,
+	    NULL, tl_intr, sc, &sc->tl_intrhand);
+
+	if (error) {
+		device_printf(dev, "couldn't set up irq\n");
+		ether_ifdetach(ifp);
+		goto fail;
+	}
+
+fail:
+	if (error)
+		tl_detach(dev);
+
+	return(error);
+}
+
+/*
+ * Shutdown hardware and free up resources. This can be called any
+ * time after the mutex has been initialized. It is called in both
+ * the error case in attach and the normal detach case so it needs
+ * to be careful about only freeing resources that have actually been
+ * allocated.
+ */
+static int
+tl_detach(dev)
+	device_t		dev;
+{
+	struct tl_softc		*sc;
+	struct ifnet		*ifp;
+
+	sc = device_get_softc(dev);
+	KASSERT(mtx_initialized(&sc->tl_mtx), ("tl mutex not initialized"));
+	ifp = sc->tl_ifp;
+
+	/* These should only be active if attach succeeded */
+	if (device_is_attached(dev)) {
+		TL_LOCK(sc);
+		tl_stop(sc);
+		TL_UNLOCK(sc);
+		callout_drain(&sc->tl_stat_callout);
+		ether_ifdetach(ifp);
+	}
+	if (sc->tl_miibus)
+		device_delete_child(dev, sc->tl_miibus);
+	bus_generic_detach(dev);
+
+	if (sc->tl_ldata)
+		contigfree(sc->tl_ldata, sizeof(struct tl_list_data), M_DEVBUF);
+	if (sc->tl_bitrate)
+		ifmedia_removeall(&sc->ifmedia);
+
+	if (sc->tl_intrhand)
+		bus_teardown_intr(dev, sc->tl_irq, sc->tl_intrhand);
+	if (sc->tl_irq)
+		bus_release_resource(dev, SYS_RES_IRQ, 0, sc->tl_irq);
+	if (sc->tl_res)
+		bus_release_resource(dev, TL_RES, TL_RID, sc->tl_res);
+
+	if (ifp)
+		if_free(ifp);
+
+	mtx_destroy(&sc->tl_mtx);
+
+	return(0);
+}
+
+/*
+ * Initialize the transmit lists.
+ */
+static int
+tl_list_tx_init(sc)
+	struct tl_softc		*sc;
+{
+	struct tl_chain_data	*cd;
+	struct tl_list_data	*ld;
+	int			i;
+
+	cd = &sc->tl_cdata;
+	ld = sc->tl_ldata;
+	for (i = 0; i < TL_TX_LIST_CNT; i++) {
+		cd->tl_tx_chain[i].tl_ptr = &ld->tl_tx_list[i];
+		if (i == (TL_TX_LIST_CNT - 1))
+			cd->tl_tx_chain[i].tl_next = NULL;
+		else
+			cd->tl_tx_chain[i].tl_next = &cd->tl_tx_chain[i + 1];
+	}
+
+	cd->tl_tx_free = &cd->tl_tx_chain[0];
+	cd->tl_tx_tail = cd->tl_tx_head = NULL;
+	sc->tl_txeoc = 1;
+
+	return(0);
+}
+
+/*
+ * Initialize the RX lists and allocate mbufs for them.
+ */
+static int
+tl_list_rx_init(sc)
+	struct tl_softc		*sc;
+{
+	struct tl_chain_data	*cd;
+	struct tl_list_data	*ld;
+	int			i;
+
+	cd = &sc->tl_cdata;
+	ld = sc->tl_ldata;
+
+	for (i = 0; i < TL_RX_LIST_CNT; i++) {
+		cd->tl_rx_chain[i].tl_ptr =
+			(struct tl_list_onefrag *)&ld->tl_rx_list[i];
+		if (tl_newbuf(sc, &cd->tl_rx_chain[i]) == ENOBUFS)
+			return(ENOBUFS);
+		if (i == (TL_RX_LIST_CNT - 1)) {
+			cd->tl_rx_chain[i].tl_next = NULL;
+			ld->tl_rx_list[i].tlist_fptr = 0;
+		} else {
+			cd->tl_rx_chain[i].tl_next = &cd->tl_rx_chain[i + 1];
+			ld->tl_rx_list[i].tlist_fptr =
+					vtophys(&ld->tl_rx_list[i + 1]);
+		}
+	}
+
+	cd->tl_rx_head = &cd->tl_rx_chain[0];
+	cd->tl_rx_tail = &cd->tl_rx_chain[TL_RX_LIST_CNT - 1];
+
+	return(0);
+}
+
+static int
+tl_newbuf(sc, c)
+	struct tl_softc		*sc;
+	struct tl_chain_onefrag	*c;
+{
+	struct mbuf		*m_new = NULL;
+
+	m_new = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
+	if (m_new == NULL)
+		return(ENOBUFS);
+
+	c->tl_mbuf = m_new;
+	c->tl_next = NULL;
+	c->tl_ptr->tlist_frsize = MCLBYTES;
+	c->tl_ptr->tlist_fptr = 0;
+	c->tl_ptr->tl_frag.tlist_dadr = vtophys(mtod(m_new, caddr_t));
+	c->tl_ptr->tl_frag.tlist_dcnt = MCLBYTES;
+	c->tl_ptr->tlist_cstat = TL_CSTAT_READY;
+
+	return(0);
+}
+/*
+ * Interrupt handler for RX 'end of frame' condition (EOF). This
+ * tells us that a full ethernet frame has been captured and we need
+ * to handle it.
+ *
+ * Reception is done using 'lists' which consist of a header and a
+ * series of 10 data count/data address pairs that point to buffers.
+ * Initially you're supposed to create a list, populate it with pointers
+ * to buffers, then load the physical address of the list into the
+ * ch_parm register. The adapter is then supposed to DMA the received
+ * frame into the buffers for you.
+ *
+ * To make things as fast as possible, we have the chip DMA directly
+ * into mbufs. This saves us from having to do a buffer copy: we can
+ * just hand the mbufs directly to ether_input(). Once the frame has
+ * been sent on its way, the 'list' structure is assigned a new buffer
+ * and moved to the end of the RX chain. As long we we stay ahead of
+ * the chip, it will always think it has an endless receive channel.
+ *
+ * If we happen to fall behind and the chip manages to fill up all of
+ * the buffers, it will generate an end of channel interrupt and wait
+ * for us to empty the chain and restart the receiver.
+ */
+static int
+tl_intvec_rxeof(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+	int			r = 0, total_len = 0;
+	struct ether_header	*eh;
+	struct mbuf		*m;
+	struct ifnet		*ifp;
+	struct tl_chain_onefrag	*cur_rx;
+
+	sc = xsc;
+	ifp = sc->tl_ifp;
+
+	TL_LOCK_ASSERT(sc);
+
+	while(sc->tl_cdata.tl_rx_head != NULL) {
+		cur_rx = sc->tl_cdata.tl_rx_head;
+		if (!(cur_rx->tl_ptr->tlist_cstat & TL_CSTAT_FRAMECMP))
+			break;
+		r++;
+		sc->tl_cdata.tl_rx_head = cur_rx->tl_next;
+		m = cur_rx->tl_mbuf;
+		total_len = cur_rx->tl_ptr->tlist_frsize;
+
+		if (tl_newbuf(sc, cur_rx) == ENOBUFS) {
+			ifp->if_ierrors++;
+			cur_rx->tl_ptr->tlist_frsize = MCLBYTES;
+			cur_rx->tl_ptr->tlist_cstat = TL_CSTAT_READY;
+			cur_rx->tl_ptr->tl_frag.tlist_dcnt = MCLBYTES;
+			continue;
+		}
+
+		sc->tl_cdata.tl_rx_tail->tl_ptr->tlist_fptr =
+						vtophys(cur_rx->tl_ptr);
+		sc->tl_cdata.tl_rx_tail->tl_next = cur_rx;
+		sc->tl_cdata.tl_rx_tail = cur_rx;
+
+		/*
+		 * Note: when the ThunderLAN chip is in 'capture all
+		 * frames' mode, it will receive its own transmissions.
+		 * We drop don't need to process our own transmissions,
+		 * so we drop them here and continue.
+		 */
+		eh = mtod(m, struct ether_header *);
+		/*if (ifp->if_flags & IFF_PROMISC && */
+		if (!bcmp(eh->ether_shost, IF_LLADDR(sc->tl_ifp),
+		 					ETHER_ADDR_LEN)) {
+				m_freem(m);
+				continue;
+		}
+
+		m->m_pkthdr.rcvif = ifp;
+		m->m_pkthdr.len = m->m_len = total_len;
+
+		TL_UNLOCK(sc);
+		(*ifp->if_input)(ifp, m);
+		TL_LOCK(sc);
+	}
+
+	return(r);
+}
+
+/*
+ * The RX-EOC condition hits when the ch_parm address hasn't been
+ * initialized or the adapter reached a list with a forward pointer
+ * of 0 (which indicates the end of the chain). In our case, this means
+ * the card has hit the end of the receive buffer chain and we need to
+ * empty out the buffers and shift the pointer back to the beginning again.
+ */
+static int
+tl_intvec_rxeoc(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+	int			r;
+	struct tl_chain_data	*cd;
+
+
+	sc = xsc;
+	cd = &sc->tl_cdata;
+
+	/* Flush out the receive queue and ack RXEOF interrupts. */
+	r = tl_intvec_rxeof(xsc, type);
+	CMD_PUT(sc, TL_CMD_ACK | r | (type & ~(0x00100000)));
+	r = 1;
+	cd->tl_rx_head = &cd->tl_rx_chain[0];
+	cd->tl_rx_tail = &cd->tl_rx_chain[TL_RX_LIST_CNT - 1];
+	CSR_WRITE_4(sc, TL_CH_PARM, vtophys(sc->tl_cdata.tl_rx_head->tl_ptr));
+	r |= (TL_CMD_GO|TL_CMD_RT);
+	return(r);
+}
+
+static int
+tl_intvec_txeof(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+	int			r = 0;
+	struct tl_chain		*cur_tx;
+
+	sc = xsc;
+
+	/*
+	 * Go through our tx list and free mbufs for those
+	 * frames that have been sent.
+	 */
+	while (sc->tl_cdata.tl_tx_head != NULL) {
+		cur_tx = sc->tl_cdata.tl_tx_head;
+		if (!(cur_tx->tl_ptr->tlist_cstat & TL_CSTAT_FRAMECMP))
+			break;
+		sc->tl_cdata.tl_tx_head = cur_tx->tl_next;
+
+		r++;
+		m_freem(cur_tx->tl_mbuf);
+		cur_tx->tl_mbuf = NULL;
+
+		cur_tx->tl_next = sc->tl_cdata.tl_tx_free;
+		sc->tl_cdata.tl_tx_free = cur_tx;
+		if (!cur_tx->tl_ptr->tlist_fptr)
+			break;
+	}
+
+	return(r);
+}
+
+/*
+ * The transmit end of channel interrupt. The adapter triggers this
+ * interrupt to tell us it hit the end of the current transmit list.
+ *
+ * A note about this: it's possible for a condition to arise where
+ * tl_start() may try to send frames between TXEOF and TXEOC interrupts.
+ * You have to avoid this since the chip expects things to go in a
+ * particular order: transmit, acknowledge TXEOF, acknowledge TXEOC.
+ * When the TXEOF handler is called, it will free all of the transmitted
+ * frames and reset the tx_head pointer to NULL. However, a TXEOC
+ * interrupt should be received and acknowledged before any more frames
+ * are queued for transmission. If tl_statrt() is called after TXEOF
+ * resets the tx_head pointer but _before_ the TXEOC interrupt arrives,
+ * it could attempt to issue a transmit command prematurely.
+ *
+ * To guard against this, tl_start() will only issue transmit commands
+ * if the tl_txeoc flag is set, and only the TXEOC interrupt handler
+ * can set this flag once tl_start() has cleared it.
+ */
+static int
+tl_intvec_txeoc(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+	struct ifnet		*ifp;
+	u_int32_t		cmd;
+
+	sc = xsc;
+	ifp = sc->tl_ifp;
+
+	/* Clear the timeout timer. */
+	ifp->if_timer = 0;
+
+	if (sc->tl_cdata.tl_tx_head == NULL) {
+		ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+		sc->tl_cdata.tl_tx_tail = NULL;
+		sc->tl_txeoc = 1;
+	} else {
+		sc->tl_txeoc = 0;
+		/* First we have to ack the EOC interrupt. */
+		CMD_PUT(sc, TL_CMD_ACK | 0x00000001 | type);
+		/* Then load the address of the next TX list. */
+		CSR_WRITE_4(sc, TL_CH_PARM,
+		    vtophys(sc->tl_cdata.tl_tx_head->tl_ptr));
+		/* Restart TX channel. */
+		cmd = CSR_READ_4(sc, TL_HOSTCMD);
+		cmd &= ~TL_CMD_RT;
+		cmd |= TL_CMD_GO|TL_CMD_INTSON;
+		CMD_PUT(sc, cmd);
+		return(0);
+	}
+
+	return(1);
+}
+
+static int
+tl_intvec_adchk(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+
+	sc = xsc;
+
+	if (type)
+		device_printf(sc->tl_dev, "adapter check: %x\n",
+			(unsigned int)CSR_READ_4(sc, TL_CH_PARM));
+
+	tl_softreset(sc, 1);
+	tl_stop(sc);
+	tl_init_locked(sc);
+	CMD_SET(sc, TL_CMD_INTSON);
+
+	return(0);
+}
+
+static int
+tl_intvec_netsts(xsc, type)
+	void			*xsc;
+	u_int32_t		type;
+{
+	struct tl_softc		*sc;
+	u_int16_t		netsts;
+
+	sc = xsc;
+
+	netsts = tl_dio_read16(sc, TL_NETSTS);
+	tl_dio_write16(sc, TL_NETSTS, netsts);
+
+	device_printf(sc->tl_dev, "network status: %x\n", netsts);
+
+	return(1);
+}
+
+static void
+tl_intr(xsc)
+	void			*xsc;
+{
+	struct tl_softc		*sc;
+	struct ifnet		*ifp;
+	int			r = 0;
+	u_int32_t		type = 0;
+	u_int16_t		ints = 0;
+	u_int8_t		ivec = 0;
+
+	sc = xsc;
+	TL_LOCK(sc);
+
+	/* Disable interrupts */
+	ints = CSR_READ_2(sc, TL_HOST_INT);
+	CSR_WRITE_2(sc, TL_HOST_INT, ints);
+	type = (ints << 16) & 0xFFFF0000;
+	ivec = (ints & TL_VEC_MASK) >> 5;
+	ints = (ints & TL_INT_MASK) >> 2;
+
+	ifp = sc->tl_ifp;
+
+	switch(ints) {
+	case (TL_INTR_INVALID):
+#ifdef DIAGNOSTIC
+		device_printf(sc->tl_dev, "got an invalid interrupt!\n");
+#endif
+		/* Re-enable interrupts but don't ack this one. */
+		CMD_PUT(sc, type);
+		r = 0;
+		break;
+	case (TL_INTR_TXEOF):
+		r = tl_intvec_txeof((void *)sc, type);
+		break;
+	case (TL_INTR_TXEOC):
+		r = tl_intvec_txeoc((void *)sc, type);
+		break;
+	case (TL_INTR_STATOFLOW):
+		tl_stats_update(sc);
+		r = 1;
+		break;
+	case (TL_INTR_RXEOF):
+		r = tl_intvec_rxeof((void *)sc, type);
+		break;
+	case (TL_INTR_DUMMY):
+		device_printf(sc->tl_dev, "got a dummy interrupt\n");
+		r = 1;
+		break;
+	case (TL_INTR_ADCHK):
+		if (ivec)
+			r = tl_intvec_adchk((void *)sc, type);
+		else
+			r = tl_intvec_netsts((void *)sc, type);
+		break;
+	case (TL_INTR_RXEOC):
+		r = tl_intvec_rxeoc((void *)sc, type);
+		break;
+	default:
+		device_printf(sc->tl_dev, "bogus interrupt type\n");
+		break;
+	}
+
+	/* Re-enable interrupts */
+	if (r) {
+		CMD_PUT(sc, TL_CMD_ACK | r | type);
+	}
+
+	if (ifp->if_snd.ifq_head != NULL)
+		tl_start_locked(ifp);
+
+	TL_UNLOCK(sc);
+
+	return;
+}
+
+static void
+tl_stats_update(xsc)
+	void			*xsc;
+{
+	struct tl_softc		*sc;
+	struct ifnet		*ifp;
+	struct tl_stats		tl_stats;
+	struct mii_data		*mii;
+	u_int32_t		*p;
+
+	bzero((char *)&tl_stats, sizeof(struct tl_stats));
+
+	sc = xsc;
+	TL_LOCK_ASSERT(sc);
+	ifp = sc->tl_ifp;
+
+	p = (u_int32_t *)&tl_stats;
+
+	CSR_WRITE_2(sc, TL_DIO_ADDR, TL_TXGOODFRAMES|TL_DIO_ADDR_INC);
+	*p++ = CSR_READ_4(sc, TL_DIO_DATA);
+	*p++ = CSR_READ_4(sc, TL_DIO_DATA);
+	*p++ = CSR_READ_4(sc, TL_DIO_DATA);
+	*p++ = CSR_READ_4(sc, TL_DIO_DATA);
+	*p++ = CSR_READ_4(sc, TL_DIO_DATA);
+
+	ifp->if_opackets += tl_tx_goodframes(tl_stats);
+	ifp->if_collisions += tl_stats.tl_tx_single_collision +
+				tl_stats.tl_tx_multi_collision;
+	ifp->if_ipackets += tl_rx_goodframes(tl_stats);
+	ifp->if_ierrors += tl_stats.tl_crc_errors + tl_stats.tl_code_errors +
+			    tl_rx_overrun(tl_stats);
+	ifp->if_oerrors += tl_tx_underrun(tl_stats);
+
+	if (tl_tx_underrun(tl_stats)) {
+		u_int8_t		tx_thresh;
+		tx_thresh = tl_dio_read8(sc, TL_ACOMMIT) & TL_AC_TXTHRESH;
+		if (tx_thresh != TL_AC_TXTHRESH_WHOLEPKT) {
+			tx_thresh >>= 4;
+			tx_thresh++;
+			device_printf(sc->tl_dev, "tx underrun -- increasing "
+			    "tx threshold to %d bytes\n",
+			    (64 * (tx_thresh * 4)));
+			tl_dio_clrbit(sc, TL_ACOMMIT, TL_AC_TXTHRESH);
+			tl_dio_setbit(sc, TL_ACOMMIT, tx_thresh << 4);
+		}
+	}
+
+	callout_reset(&sc->tl_stat_callout, hz, tl_stats_update, sc);
+
+	if (!sc->tl_bitrate) {
+		mii = device_get_softc(sc->tl_miibus);
+		mii_tick(mii);
+	}
+
+	return;
+}
+
+/*
+ * Encapsulate an mbuf chain in a list by coupling the mbuf data
+ * pointers to the fragment pointers.
+ */
+static int
+tl_encap(sc, c, m_head)
+	struct tl_softc		*sc;
+	struct tl_chain		*c;
+	struct mbuf		*m_head;
+{
+	int			frag = 0;
+	struct tl_frag		*f = NULL;
+	int			total_len;
+	struct mbuf		*m;
+	struct ifnet		*ifp = sc->tl_ifp;
+
+	/*
+ 	 * Start packing the mbufs in this chain into
+	 * the fragment pointers. Stop when we run out
+ 	 * of fragments or hit the end of the mbuf chain.
+	 */
+	m = m_head;
+	total_len = 0;
+
+	for (m = m_head, frag = 0; m != NULL; m = m->m_next) {
+		if (m->m_len != 0) {
+			if (frag == TL_MAXFRAGS)
+				break;
+			total_len+= m->m_len;
+			c->tl_ptr->tl_frag[frag].tlist_dadr =
+				vtophys(mtod(m, vm_offset_t));
+			c->tl_ptr->tl_frag[frag].tlist_dcnt = m->m_len;
+			frag++;
+		}
+	}
+
+	/*
+	 * Handle special cases.
+	 * Special case #1: we used up all 10 fragments, but
+	 * we have more mbufs left in the chain. Copy the
+	 * data into an mbuf cluster. Note that we don't
+	 * bother clearing the values in the other fragment
+	 * pointers/counters; it wouldn't gain us anything,
+	 * and would waste cycles.
+	 */
+	if (m != NULL) {
+		struct mbuf		*m_new = NULL;
+
+		MGETHDR(m_new, M_DONTWAIT, MT_DATA);
+		if (m_new == NULL) {
+			if_printf(ifp, "no memory for tx list\n");
+			return(1);
+		}
+		if (m_head->m_pkthdr.len > MHLEN) {
+			MCLGET(m_new, M_DONTWAIT);
+			if (!(m_new->m_flags & M_EXT)) {
+				m_freem(m_new);
+				if_printf(ifp, "no memory for tx list\n");
+				return(1);
+			}
+		}
+		m_copydata(m_head, 0, m_head->m_pkthdr.len,	
+					mtod(m_new, caddr_t));
+		m_new->m_pkthdr.len = m_new->m_len = m_head->m_pkthdr.len;
+		m_freem(m_head);
+		m_head = m_new;
+		f = &c->tl_ptr->tl_frag[0];
+		f->tlist_dadr = vtophys(mtod(m_new, caddr_t));
+		f->tlist_dcnt = total_len = m_new->m_len;
+		frag = 1;
+	}
+
+	/*
+	 * Special case #2: the frame is smaller than the minimum
+	 * frame size. We have to pad it to make the chip happy.
+	 */
+	if (total_len < TL_MIN_FRAMELEN) {
+		if (frag == TL_MAXFRAGS)
+			if_printf(ifp,
+			    "all frags filled but frame still to small!\n");
+		f = &c->tl_ptr->tl_frag[frag];
+		f->tlist_dcnt = TL_MIN_FRAMELEN - total_len;
+		f->tlist_dadr = vtophys(&sc->tl_ldata->tl_pad);
+		total_len += f->tlist_dcnt;
+		frag++;
+	}
+
+	c->tl_mbuf = m_head;
+	c->tl_ptr->tl_frag[frag - 1].tlist_dcnt |= TL_LAST_FRAG;
+	c->tl_ptr->tlist_frsize = total_len;
+	c->tl_ptr->tlist_cstat = TL_CSTAT_READY;
+	c->tl_ptr->tlist_fptr = 0;
+
+	return(0);
+}
+
+/*
+ * Main transmit routine. To avoid having to do mbuf copies, we put pointers
+ * to the mbuf data regions directly in the transmit lists. We also save a
+ * copy of the pointers since the transmit list fragment pointers are
+ * physical addresses.
+ */
+static void
+tl_start(ifp)
+	struct ifnet		*ifp;
+{
+	struct tl_softc		*sc;
+
+	sc = ifp->if_softc;
+	TL_LOCK(sc);
+	tl_start_locked(ifp);
+	TL_UNLOCK(sc);
+}
+
+static void
+tl_start_locked(ifp)
+	struct ifnet		*ifp;
+{
+	struct tl_softc		*sc;
+	struct mbuf		*m_head = NULL;
+	u_int32_t		cmd;
+	struct tl_chain		*prev = NULL, *cur_tx = NULL, *start_tx;
+
+	sc = ifp->if_softc;
+	TL_LOCK_ASSERT(sc);
+
+	/*
+	 * Check for an available queue slot. If there are none,
+	 * punt.
+	 */
+	if (sc->tl_cdata.tl_tx_free == NULL) {
+		ifp->if_drv_flags |= IFF_DRV_OACTIVE;
+		return;
+	}
+
+	start_tx = sc->tl_cdata.tl_tx_free;
+
+	while(sc->tl_cdata.tl_tx_free != NULL) {
+		IF_DEQUEUE(&ifp->if_snd, m_head);
+		if (m_head == NULL)
+			break;
+
+		/* Pick a chain member off the free list. */
+		cur_tx = sc->tl_cdata.tl_tx_free;
+		sc->tl_cdata.tl_tx_free = cur_tx->tl_next;
+
+		cur_tx->tl_next = NULL;
+
+		/* Pack the data into the list. */
+		tl_encap(sc, cur_tx, m_head);
+
+		/* Chain it together */
+		if (prev != NULL) {
+			prev->tl_next = cur_tx;
+			prev->tl_ptr->tlist_fptr = vtophys(cur_tx->tl_ptr);
+		}
+		prev = cur_tx;
+
+		/*
+		 * If there's a BPF listener, bounce a copy of this frame
+		 * to him.
+		 */
+		BPF_MTAP(ifp, cur_tx->tl_mbuf);
+	}
+
+	/*
+	 * If there are no packets queued, bail.
+	 */
+	if (cur_tx == NULL)
+		return;
+
+	/*
+	 * That's all we can stands, we can't stands no more.
+	 * If there are no other transfers pending, then issue the
+	 * TX GO command to the adapter to start things moving.
+	 * Otherwise, just leave the data in the queue and let
+	 * the EOF/EOC interrupt handler send.
+	 */
+	if (sc->tl_cdata.tl_tx_head == NULL) {
+		sc->tl_cdata.tl_tx_head = start_tx;
+		sc->tl_cdata.tl_tx_tail = cur_tx;
+
+		if (sc->tl_txeoc) {
+			sc->tl_txeoc = 0;
+			CSR_WRITE_4(sc, TL_CH_PARM, vtophys(start_tx->tl_ptr));
+			cmd = CSR_READ_4(sc, TL_HOSTCMD);
+			cmd &= ~TL_CMD_RT;
+			cmd |= TL_CMD_GO|TL_CMD_INTSON;
+			CMD_PUT(sc, cmd);
+		}
+	} else {
+		sc->tl_cdata.tl_tx_tail->tl_next = start_tx;
+		sc->tl_cdata.tl_tx_tail = cur_tx;
+	}
+
+	/*
+	 * Set a timeout in case the chip goes out to lunch.
+	 */
+	ifp->if_timer = 5;
+
+	return;
+}
+
+static void
+tl_init(xsc)
+	void			*xsc;
+{
+	struct tl_softc		*sc = xsc;
+
+	TL_LOCK(sc);
+	tl_init_locked(sc);
+	TL_UNLOCK(sc);
+}
+
+static void
+tl_init_locked(sc)
+	struct tl_softc		*sc;
+{
+	struct ifnet		*ifp = sc->tl_ifp;
+	struct mii_data		*mii;
+
+	TL_LOCK_ASSERT(sc);
+
+	ifp = sc->tl_ifp;
+
+	/*
+	 * Cancel pending I/O.
+	 */
+	tl_stop(sc);
+
+	/* Initialize TX FIFO threshold */
+	tl_dio_clrbit(sc, TL_ACOMMIT, TL_AC_TXTHRESH);
+	tl_dio_setbit(sc, TL_ACOMMIT, TL_AC_TXTHRESH_16LONG);
+
+        /* Set PCI burst size */
+	tl_dio_write8(sc, TL_BSIZEREG, TL_RXBURST_16LONG|TL_TXBURST_16LONG);
+
+	/*
+	 * Set 'capture all frames' bit for promiscuous mode.
+	 */
+	if (ifp->if_flags & IFF_PROMISC)
+		tl_dio_setbit(sc, TL_NETCMD, TL_CMD_CAF);
+	else
+		tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_CAF);
+
+	/*
+	 * Set capture broadcast bit to capture broadcast frames.
+	 */
+	if (ifp->if_flags & IFF_BROADCAST)
+		tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_NOBRX);
+	else
+		tl_dio_setbit(sc, TL_NETCMD, TL_CMD_NOBRX);
+
+	tl_dio_write16(sc, TL_MAXRX, MCLBYTES);
+
+	/* Init our MAC address */
+	tl_setfilt(sc, IF_LLADDR(sc->tl_ifp), 0);
+
+	/* Init multicast filter, if needed. */
+	tl_setmulti(sc);
+
+	/* Init circular RX list. */
+	if (tl_list_rx_init(sc) == ENOBUFS) {
+		device_printf(sc->tl_dev,
+		    "initialization failed: no memory for rx buffers\n");
+		tl_stop(sc);
+		return;
+	}
+
+	/* Init TX pointers. */
+	tl_list_tx_init(sc);
+
+	/* Enable PCI interrupts. */
+	CMD_SET(sc, TL_CMD_INTSON);
+
+	/* Load the address of the rx list */
+	CMD_SET(sc, TL_CMD_RT);
+	CSR_WRITE_4(sc, TL_CH_PARM, vtophys(&sc->tl_ldata->tl_rx_list[0]));
+
+	if (!sc->tl_bitrate) {
+		if (sc->tl_miibus != NULL) {
+			mii = device_get_softc(sc->tl_miibus);
+			mii_mediachg(mii);
+		}
+	} else {
+		tl_ifmedia_upd(ifp);
+	}
+
+	/* Send the RX go command */
+	CMD_SET(sc, TL_CMD_GO|TL_CMD_NES|TL_CMD_RT);
+
+	ifp->if_drv_flags |= IFF_DRV_RUNNING;
+	ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
+
+	/* Start the stats update counter */
+	callout_reset(&sc->tl_stat_callout, hz, tl_stats_update, sc);
+
+	return;
+}
+
+/*
+ * Set media options.
+ */
+static int
+tl_ifmedia_upd(ifp)
+	struct ifnet		*ifp;
+{
+	struct tl_softc		*sc;
+	struct mii_data		*mii = NULL;
+
+	sc = ifp->if_softc;
+
+	TL_LOCK(sc);
+	if (sc->tl_bitrate)
+		tl_setmode(sc, sc->ifmedia.ifm_media);
+	else {
+		mii = device_get_softc(sc->tl_miibus);
+		mii_mediachg(mii);
+	}
+	TL_UNLOCK(sc);
+
+	return(0);
+}
+
+/*
+ * Report current media status.
+ */
+static void
+tl_ifmedia_sts(ifp, ifmr)
+	struct ifnet		*ifp;
+	struct ifmediareq	*ifmr;
+{
+	struct tl_softc		*sc;
+	struct mii_data		*mii;
+
+	sc = ifp->if_softc;
+
+	TL_LOCK(sc);
+	ifmr->ifm_active = IFM_ETHER;
+
+	if (sc->tl_bitrate) {
+		if (tl_dio_read8(sc, TL_ACOMMIT) & TL_AC_MTXD1)
+			ifmr->ifm_active = IFM_ETHER|IFM_10_5;
+		else
+			ifmr->ifm_active = IFM_ETHER|IFM_10_T;
+		if (tl_dio_read8(sc, TL_ACOMMIT) & TL_AC_MTXD3)
+			ifmr->ifm_active |= IFM_HDX;
+		else
+			ifmr->ifm_active |= IFM_FDX;
+		return;
+	} else {
+		mii = device_get_softc(sc->tl_miibus);
+		mii_pollstat(mii);
+		ifmr->ifm_active = mii->mii_media_active;
+		ifmr->ifm_status = mii->mii_media_status;
+	}
+	TL_UNLOCK(sc);
+
+	return;
+}
+
+static int
+tl_ioctl(ifp, command, data)
+	struct ifnet		*ifp;
+	u_long			command;
+	caddr_t			data;
+{
+	struct tl_softc		*sc = ifp->if_softc;
+	struct ifreq		*ifr = (struct ifreq *) data;
+	int			error = 0;
+
+	switch(command) {
+	case SIOCSIFFLAGS:
+		TL_LOCK(sc);
+		if (ifp->if_flags & IFF_UP) {
+			if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
+			    ifp->if_flags & IFF_PROMISC &&
+			    !(sc->tl_if_flags & IFF_PROMISC)) {
+				tl_dio_setbit(sc, TL_NETCMD, TL_CMD_CAF);
+				tl_setmulti(sc);
+			} else if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
+			    !(ifp->if_flags & IFF_PROMISC) &&
+			    sc->tl_if_flags & IFF_PROMISC) {
+				tl_dio_clrbit(sc, TL_NETCMD, TL_CMD_CAF);
+				tl_setmulti(sc);
+			} else
+				tl_init_locked(sc);
+		} else {
+			if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
+				tl_stop(sc);
+			}
+		}
+		sc->tl_if_flags = ifp->if_flags;
+		TL_UNLOCK(sc);
+		error = 0;
+		break;
+	case SIOCADDMULTI:
+	case SIOCDELMULTI:
+		TL_LOCK(sc);
+		tl_setmulti(sc);
+		TL_UNLOCK(sc);
+		error = 0;
+		break;
+	case SIOCSIFMEDIA:
+	case SIOCGIFMEDIA:
+		if (sc->tl_bitrate)
+			error = ifmedia_ioctl(ifp, ifr, &sc->ifmedia, command);
+		else {
+			struct mii_data		*mii;
+			mii = device_get_softc(sc->tl_miibus);
+			error = ifmedia_ioctl(ifp, ifr,
+			    &mii->mii_media, command);
+		}
+		break;
+	default:
+		error = ether_ioctl(ifp, command, data);
+		break;
+	}
+
+	return(error);
+}
+
+static void
+tl_watchdog(ifp)
+	struct ifnet		*ifp;
+{
+	struct tl_softc		*sc;
+
+	sc = ifp->if_softc;
+
+	if_printf(ifp, "device timeout\n");
+
+	TL_LOCK(sc);
+	ifp->if_oerrors++;
+
+	tl_softreset(sc, 1);
+	tl_init_locked(sc);
+	TL_UNLOCK(sc);
+
+	return;
+}
+
+/*
+ * Stop the adapter and free any mbufs allocated to the
+ * RX and TX lists.
+ */
+static void
+tl_stop(sc)
+	struct tl_softc		*sc;
+{
+	register int		i;
+	struct ifnet		*ifp;
+
+	TL_LOCK_ASSERT(sc);
+
+	ifp = sc->tl_ifp;
+
+	/* Stop the stats updater. */
+	callout_stop(&sc->tl_stat_callout);
+
+	/* Stop the transmitter */
+	CMD_CLR(sc, TL_CMD_RT);
+	CMD_SET(sc, TL_CMD_STOP);
+	CSR_WRITE_4(sc, TL_CH_PARM, 0);
+
+	/* Stop the receiver */
+	CMD_SET(sc, TL_CMD_RT);
+	CMD_SET(sc, TL_CMD_STOP);
+	CSR_WRITE_4(sc, TL_CH_PARM, 0);
+
+	/*
+	 * Disable host interrupts.
+	 */
+	CMD_SET(sc, TL_CMD_INTSOFF);
+
+	/*
+	 * Clear list pointer.
+	 */
+	CSR_WRITE_4(sc, TL_CH_PARM, 0);
+
+	/*
+	 * Free the RX lists.
+	 */
+	for (i = 0; i < TL_RX_LIST_CNT; i++) {
+		if (sc->tl_cdata.tl_rx_chain[i].tl_mbuf != NULL) {
+			m_freem(sc->tl_cdata.tl_rx_chain[i].tl_mbuf);
+			sc->tl_cdata.tl_rx_chain[i].tl_mbuf = NULL;
+		}
+	}
+	bzero((char *)&sc->tl_ldata->tl_rx_list,
+		sizeof(sc->tl_ldata->tl_rx_list));
+
+	/*
+	 * Free the TX list buffers.
+	 */
+	for (i = 0; i < TL_TX_LIST_CNT; i++) {
+		if (sc->tl_cdata.tl_tx_chain[i].tl_mbuf != NULL) {
+			m_freem(sc->tl_cdata.tl_tx_chain[i].tl_mbuf);
+			sc->tl_cdata.tl_tx_chain[i].tl_mbuf = NULL;
+		}
+	}
+	bzero((char *)&sc->tl_ldata->tl_tx_list,
+		sizeof(sc->tl_ldata->tl_tx_list));
+
+	ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
+
+	return;
+}
+
+/*
+ * Stop all chip I/O so that the kernel's probe routines don't
+ * get confused by errant DMAs when rebooting.
+ */
+static void
+tl_shutdown(dev)
+	device_t		dev;
+{
+	struct tl_softc		*sc;
+
+	sc = device_get_softc(dev);
+
+	TL_LOCK(sc);
+	tl_stop(sc);
+	TL_UNLOCK(sc);
+
+	return;
+}