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+/*
+ * Copyright (c) 1997, 1998, 1999
+ * Bill Paul <wpaul@ee.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.
+ *
+ * $FreeBSD: src/sys/pci/if_dc.c,v 1.2 1999/12/07 19:18:41 wpaul Exp $
+ */
+
+/*
+ * DEC "tulip" clone ethernet driver. Supports the DEC/Intel 21143
+ * series chips and several workalikes including the following:
+ *
+ * Macronix 98713/98715/98725 PMAC (www.macronix.com)
+ * Macronix/Lite-On 82c115 PNIC II (www.macronix.com)
+ * Lite-On 82c168/82c169 PNIC (www.litecom.com)
+ * ASIX Electronics AX88140A (www.asix.com.tw)
+ * ASIX Electronics AX88141 (www.asix.com.tw)
+ * ADMtek AL981 (www.admtek.com.tw)
+ * ADMtek AN985 (www.admtek.com.tw)
+ * Davicom DM9100, DM9102 (www.davicom8.com)
+ *
+ * Datasheets for the 21143 are available at developer.intel.com.
+ * Datasheets for the clone parts can be found at their respective sites.
+ * (Except for the PNIC; see www.freebsd.org/~wpaul/PNIC/pnic.ps.gz.)
+ * The PNIC II is essentially a Macronix 98715A chip; the only difference
+ * worth noting is that its multicast hash table is only 128 bits wide
+ * instead of 512.
+ *
+ * Written by Bill Paul <wpaul@ee.columbia.edu>
+ * Electrical Engineering Department
+ * Columbia University, New York City
+ */
+
+/*
+ * The Intel 21143 is the successor to the DEC 21140. It is basically
+ * the same as the 21140 but with a few new features. The 21143 supports
+ * three kinds of media attachments:
+ *
+ * o MII port, for 10Mbps and 100Mbps support and NWAY
+ * autonegotiation provided by an external PHY.
+ * o SYM port, for symbol mode 100Mbps support.
+ * o 10baseT port.
+ * o AUI/BNC port.
+ *
+ * The 100Mbps SYM port and 10baseT port can be used together in
+ * combination with the internal NWAY support to create a 10/100
+ * autosensing configuration.
+ *
+ * Knowing which media is available on a given card is tough: you're
+ * supposed to go slogging through the EEPROM looking for media
+ * description structures. Unfortunately, some card vendors that use
+ * the 21143 don't obey the DEC SROM spec correctly, which means that
+ * what you find in the EEPROM may not agree with reality. Fortunately,
+ * the 21143 provides us a way to get around this issue: lurking in
+ * PCI configuration space is the Configuration Wake-Up Command Register.
+ * This register is loaded with a value from the EEPROM when wake on LAN
+ * mode is enabled; this value tells us quite clearly what kind of media
+ * is attached to the NIC. The main purpose of this register is to tell
+ * the NIC what media to scan when in wake on LAN mode, however by
+ * forcibly enabling wake on LAN mode, we can use to learn what kind of
+ * media a given NIC has available and adapt ourselves accordingly.
+ *
+ * Of course, if the media description blocks in the EEPROM are bogus.
+ * what are the odds that the CWUC aren't bogus as well, right? Well,
+ * the CWUC value is more likely to be correct since wake on LAN mode
+ * won't work correctly without it, and wake on LAN is a big selling
+ * point these days. It's also harder to screw up a single byte than
+ * a whole media descriptor block.
+ *
+ * Note that not all tulip workalikes are handled in this driver: we only
+ * deal with those which are relatively well behaved. The Winbond is
+ * handled separately due to its different register offsets and the
+ * special handling needed for its various bugs. The PNIC is handled
+ * here, but I'm not thrilled about it.
+ *
+ * All of the workalike chips use some form of MII transceiver support
+ * with the exception of the Macronix chips, which also have a SYM port.
+ * The ASIX AX88140A is also documented to have a SYM port, but all
+ * the cards I've seen use an MII transceiver, probably because the
+ * AX88140A doesn't support internal NWAY.
+ */
+
+#include "bpfilter.h"
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/errno.h>
+#include <sys/malloc.h>
+#include <sys/kernel.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/if_types.h>
+
+#ifdef INET
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/in_var.h>
+#include <netinet/ip.h>
+#include <netinet/if_ether.h>
+#endif
+
+#include <net/if_media.h>
+
+#if NBPFILTER > 0
+#include <net/bpf.h>
+#endif
+
+#include <vm/vm.h> /* for vtophys */
+#include <vm/pmap.h> /* for vtophys */
+
+#include <sys/device.h>
+
+#include <dev/mii/mii.h>
+#include <dev/mii/miivar.h>
+
+#include <dev/pci/pcireg.h>
+#include <dev/pci/pcivar.h>
+#include <dev/pci/pcidevs.h>
+
+#define DC_USEIOSPACE
+
+#include <dev/pci/if_dcreg.h>
+
+/*
+ * Various supported device vendors/types and their names.
+ */
+struct dc_type dc_devs[] = {
+ { DC_VENDORID_DEC, DC_DEVICEID_21143,
+ "Intel 21143 10/100BaseTX" },
+ { DC_VENDORID_DAVICOM, DC_DEVICEID_DM9100,
+ "Davicom DM9100 10/100BaseTX" },
+ { DC_VENDORID_DAVICOM, DC_DEVICEID_DM9102,
+ "Davicom DM9102 10/100BaseTX" },
+ { DC_VENDORID_ADMTEK, DC_DEVICEID_AL981,
+ "ADMtek AL981 10/100BaseTX" },
+ { DC_VENDORID_ADMTEK, DC_DEVICEID_AN985,
+ "ADMtek AN985 10/100BaseTX" },
+ { DC_VENDORID_ASIX, DC_DEVICEID_AX88140A,
+ "ASIX AX88140A 10/100BaseTX" },
+ { DC_VENDORID_ASIX, DC_DEVICEID_AX88140A,
+ "ASIX AX88141 10/100BaseTX" },
+ { DC_VENDORID_MX, DC_DEVICEID_98713,
+ "Macronix 98713 10/100BaseTX" },
+ { DC_VENDORID_MX, DC_DEVICEID_98713,
+ "Macronix 98713A 10/100BaseTX" },
+ { DC_VENDORID_CP, DC_DEVICEID_98713_CP,
+ "Compex RL100-TX 10/100BaseTX" },
+ { DC_VENDORID_CP, DC_DEVICEID_98713_CP,
+ "Compex RL100-TX 10/100BaseTX" },
+ { DC_VENDORID_MX, DC_DEVICEID_987x5,
+ "Macronix 98715/98715A 10/100BaseTX" },
+ { DC_VENDORID_MX, DC_DEVICEID_987x5,
+ "Macronix 98725 10/100BaseTX" },
+ { DC_VENDORID_LO, DC_DEVICEID_82C115,
+ "LC82C115 PNIC II 10/100BaseTX" },
+ { DC_VENDORID_LO, DC_DEVICEID_82C168,
+ "82c168 PNIC 10/100BaseTX" },
+ { DC_VENDORID_LO, DC_DEVICEID_82C168,
+ "82c169 PNIC 10/100BaseTX" },
+ { 0, 0, NULL }
+};
+
+int dc_probe __P((struct device *, void *, void *));
+void dc_attach __P((struct device *, struct device *, void *));
+int dc_intr __P((void *));
+void dc_shutdown __P((void *));
+void dc_acpi __P((struct device *, void *));
+struct dc_type *dc_devtype __P((void *));
+int dc_newbuf __P((struct dc_softc *, int, struct mbuf *));
+int dc_encap __P((struct dc_softc *, struct mbuf *, u_int32_t *));
+void dc_pnic_rx_bug_war __P((struct dc_softc *, int));
+void dc_rxeof __P((struct dc_softc *));
+void dc_txeof __P((struct dc_softc *));
+void dc_tick __P((void *));
+void dc_start __P((struct ifnet *));
+int dc_ioctl __P((struct ifnet *, u_long, caddr_t));
+void dc_init __P((void *));
+void dc_stop __P((struct dc_softc *));
+void dc_watchdog __P((struct ifnet *));
+int dc_ifmedia_upd __P((struct ifnet *));
+void dc_ifmedia_sts __P((struct ifnet *, struct ifmediareq *));
+
+void dc_delay __P((struct dc_softc *));
+void dc_eeprom_idle __P((struct dc_softc *));
+void dc_eeprom_putbyte __P((struct dc_softc *, int));
+void dc_eeprom_getword __P((struct dc_softc *, int, u_int16_t *));
+void dc_eeprom_getword_pnic __P((struct dc_softc *, int, u_int16_t *));
+void dc_read_eeprom __P((struct dc_softc *, caddr_t, int, int, int));
+
+void dc_mii_writebit __P((struct dc_softc *, int));
+int dc_mii_readbit __P((struct dc_softc *));
+void dc_mii_sync __P((struct dc_softc *));
+void dc_mii_send __P((struct dc_softc *, u_int32_t, int));
+int dc_mii_readreg __P((struct dc_softc *, struct dc_mii_frame *));
+int dc_mii_writereg __P((struct dc_softc *, struct dc_mii_frame *));
+int dc_miibus_readreg __P((struct device *, int, int));
+void dc_miibus_writereg __P((struct device *, int, int, int));
+void dc_miibus_statchg __P((struct device *));
+
+void dc_setcfg __P((struct dc_softc *, int));
+u_int32_t dc_crc_le __P((struct dc_softc *, caddr_t));
+u_int32_t dc_crc_be __P((caddr_t));
+void dc_setfilt_21143 __P((struct dc_softc *));
+void dc_setfilt_asix __P((struct dc_softc *));
+void dc_setfilt_admtek __P((struct dc_softc *));
+
+void dc_setfilt __P((struct dc_softc *));
+
+void dc_reset __P((struct dc_softc *));
+int dc_list_rx_init __P((struct dc_softc *));
+int dc_list_tx_init __P((struct dc_softc *));
+
+#define DC_SETBIT(sc, reg, x) \
+ CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) | (x))
+
+#define DC_CLRBIT(sc, reg, x) \
+ CSR_WRITE_4(sc, reg, CSR_READ_4(sc, reg) & ~(x))
+
+#define SIO_SET(x) DC_SETBIT(sc, DC_SIO, (x))
+#define SIO_CLR(x) DC_CLRBIT(sc, DC_SIO, (x))
+
+void dc_delay(sc)
+ struct dc_softc *sc;
+{
+ int idx;
+
+ for (idx = (300 / 33) + 1; idx > 0; idx--)
+ CSR_READ_4(sc, DC_BUSCTL);
+}
+
+void dc_eeprom_idle(sc)
+ struct dc_softc *sc;
+{
+ register int i;
+
+ CSR_WRITE_4(sc, DC_SIO, DC_SIO_EESEL);
+ dc_delay(sc);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_ROMCTL_READ);
+ dc_delay(sc);
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_EE_CLK);
+ dc_delay(sc);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_EE_CS);
+ dc_delay(sc);
+
+ for (i = 0; i < 25; i++) {
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_EE_CLK);
+ dc_delay(sc);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_EE_CLK);
+ dc_delay(sc);
+ }
+
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_EE_CLK);
+ dc_delay(sc);
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_EE_CS);
+ dc_delay(sc);
+ CSR_WRITE_4(sc, DC_SIO, 0x00000000);
+
+ return;
+}
+
+/*
+ * Send a read command and address to the EEPROM, check for ACK.
+ */
+void dc_eeprom_putbyte(sc, addr)
+ struct dc_softc *sc;
+ int addr;
+{
+ register int d, i;
+
+ /*
+ * The AN985 has a 93C66 EEPROM on it instead of
+ * a 93C46. It uses a different bit sequence for
+ * specifying the "read" opcode.
+ */
+ if (DC_IS_CENTAUR(sc))
+ d = addr | (DC_EECMD_READ << 2);
+ else
+ d = addr | DC_EECMD_READ;
+
+ /*
+ * Feed in each bit and strobe the clock.
+ */
+ for (i = 0x400; i; i >>= 1) {
+ if (d & i) {
+ SIO_SET(DC_SIO_EE_DATAIN);
+ } else {
+ SIO_CLR(DC_SIO_EE_DATAIN);
+ }
+ dc_delay(sc);
+ SIO_SET(DC_SIO_EE_CLK);
+ dc_delay(sc);
+ SIO_CLR(DC_SIO_EE_CLK);
+ dc_delay(sc);
+ }
+
+ return;
+}
+
+/*
+ * Read a word of data stored in the EEPROM at address 'addr.'
+ * The PNIC 82c168/82c169 has its own non-standard way to read
+ * the EEPROM.
+ */
+void dc_eeprom_getword_pnic(sc, addr, dest)
+ struct dc_softc *sc;
+ int addr;
+ u_int16_t *dest;
+{
+ register int i;
+ u_int32_t r;
+
+ CSR_WRITE_4(sc, DC_PN_SIOCTL, DC_PN_EEOPCODE_READ|addr);
+
+ for (i = 0; i < DC_TIMEOUT; i++) {
+ DELAY(1);
+ r = CSR_READ_4(sc, DC_SIO);
+ if (!(r & DC_PN_SIOCTL_BUSY)) {
+ *dest = (u_int16_t)(r & 0xFFFF);
+ return;
+ }
+ }
+
+ return;
+}
+
+/*
+ * Read a word of data stored in the EEPROM at address 'addr.'
+ */
+void dc_eeprom_getword(sc, addr, dest)
+ struct dc_softc *sc;
+ int addr;
+ u_int16_t *dest;
+{
+ register int i;
+ u_int16_t word = 0;
+
+ /* Force EEPROM to idle state. */
+ dc_eeprom_idle(sc);
+
+ /* Enter EEPROM access mode. */
+ CSR_WRITE_4(sc, DC_SIO, DC_SIO_EESEL);
+ dc_delay(sc);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_ROMCTL_READ);
+ dc_delay(sc);
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_EE_CLK);
+ dc_delay(sc);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_EE_CS);
+ dc_delay(sc);
+
+ /*
+ * Send address of word we want to read.
+ */
+ dc_eeprom_putbyte(sc, addr);
+
+ /*
+ * Start reading bits from EEPROM.
+ */
+ for (i = 0x8000; i; i >>= 1) {
+ SIO_SET(DC_SIO_EE_CLK);
+ dc_delay(sc);
+ if (CSR_READ_4(sc, DC_SIO) & DC_SIO_EE_DATAOUT)
+ word |= i;
+ dc_delay(sc);
+ SIO_CLR(DC_SIO_EE_CLK);
+ dc_delay(sc);
+ }
+
+ /* Turn off EEPROM access mode. */
+ dc_eeprom_idle(sc);
+
+ *dest = word;
+
+ return;
+}
+
+/*
+ * Read a sequence of words from the EEPROM.
+ */
+void dc_read_eeprom(sc, dest, off, cnt, swap)
+ struct dc_softc *sc;
+ caddr_t dest;
+ int off;
+ int cnt;
+ int swap;
+{
+ int i;
+ u_int16_t word = 0, *ptr;
+
+ for (i = 0; i < cnt; i++) {
+ if (DC_IS_PNIC(sc))
+ dc_eeprom_getword_pnic(sc, off + i, &word);
+ else
+ dc_eeprom_getword(sc, off + i, &word);
+ ptr = (u_int16_t *)(dest + (i * 2));
+ if (swap)
+ *ptr = ntohs(word);
+ else
+ *ptr = word;
+ }
+
+ return;
+}
+
+/*
+ * The following two routines are taken from the Macronix 98713
+ * Application Notes pp.19-21.
+ */
+/*
+ * Write a bit to the MII bus.
+ */
+void dc_mii_writebit(sc, bit)
+ struct dc_softc *sc;
+ int bit;
+{
+ if (bit)
+ CSR_WRITE_4(sc, DC_SIO,
+ DC_SIO_ROMCTL_WRITE|DC_SIO_MII_DATAOUT);
+ else
+ CSR_WRITE_4(sc, DC_SIO, DC_SIO_ROMCTL_WRITE);
+
+ DC_SETBIT(sc, DC_SIO, DC_SIO_MII_CLK);
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_MII_CLK);
+
+ return;
+}
+
+/*
+ * Read a bit from the MII bus.
+ */
+int dc_mii_readbit(sc)
+ struct dc_softc *sc;
+{
+ CSR_WRITE_4(sc, DC_SIO, DC_SIO_ROMCTL_READ|DC_SIO_MII_DIR);
+ CSR_READ_4(sc, DC_SIO);
+ DC_SETBIT(sc, DC_SIO, DC_SIO_MII_CLK);
+ DC_CLRBIT(sc, DC_SIO, DC_SIO_MII_CLK);
+ if (CSR_READ_4(sc, DC_SIO) & DC_SIO_MII_DATAIN)
+ return(1);
+
+ return(0);
+}
+
+/*
+ * Sync the PHYs by setting data bit and strobing the clock 32 times.
+ */
+void dc_mii_sync(sc)
+ struct dc_softc *sc;
+{
+ register int i;
+
+ CSR_WRITE_4(sc, DC_SIO, DC_SIO_ROMCTL_WRITE);
+
+ for (i = 0; i < 32; i++)
+ dc_mii_writebit(sc, 1);
+
+ return;
+}
+
+/*
+ * Clock a series of bits through the MII.
+ */
+void dc_mii_send(sc, bits, cnt)
+ struct dc_softc *sc;
+ u_int32_t bits;
+ int cnt;
+{
+ int i;
+
+ for (i = (0x1 << (cnt - 1)); i; i >>= 1)
+ dc_mii_writebit(sc, bits & i);
+}
+
+/*
+ * Read an PHY register through the MII.
+ */
+int dc_mii_readreg(sc, frame)
+ struct dc_softc *sc;
+ struct dc_mii_frame *frame;
+
+{
+ int i, ack, s;
+
+ s = splimp();
+
+ /*
+ * Set up frame for RX.
+ */
+ frame->mii_stdelim = DC_MII_STARTDELIM;
+ frame->mii_opcode = DC_MII_READOP;
+ frame->mii_turnaround = 0;
+ frame->mii_data = 0;
+
+ /*
+ * Sync the PHYs.
+ */
+ dc_mii_sync(sc);
+
+ /*
+ * Send command/address info.
+ */
+ dc_mii_send(sc, frame->mii_stdelim, 2);
+ dc_mii_send(sc, frame->mii_opcode, 2);
+ dc_mii_send(sc, frame->mii_phyaddr, 5);
+ dc_mii_send(sc, frame->mii_regaddr, 5);
+
+#ifdef notdef
+ /* Idle bit */
+ dc_mii_writebit(sc, 1);
+ dc_mii_writebit(sc, 0);
+#endif
+
+ /* Check for ack */
+ ack = dc_mii_readbit(sc);
+
+ /*
+ * Now try reading data bits. If the ack failed, we still
+ * need to clock through 16 cycles to keep the PHY(s) in sync.
+ */
+ if (ack) {
+ for(i = 0; i < 16; i++) {
+ dc_mii_readbit(sc);
+ }
+ goto fail;
+ }
+
+ for (i = 0x8000; i; i >>= 1) {
+ if (!ack) {
+ if (dc_mii_readbit(sc))
+ frame->mii_data |= i;
+ }
+ }
+
+fail:
+
+ dc_mii_writebit(sc, 0);
+ dc_mii_writebit(sc, 0);
+
+ splx(s);
+
+ if (ack)
+ return(1);
+ return(0);
+}
+
+/*
+ * Write to a PHY register through the MII.
+ */
+int dc_mii_writereg(sc, frame)
+ struct dc_softc *sc;
+ struct dc_mii_frame *frame;
+
+{
+ int s;
+
+ s = splimp();
+ /*
+ * Set up frame for TX.
+ */
+
+ frame->mii_stdelim = DC_MII_STARTDELIM;
+ frame->mii_opcode = DC_MII_WRITEOP;
+ frame->mii_turnaround = DC_MII_TURNAROUND;
+
+ /*
+ * Sync the PHYs.
+ */
+ dc_mii_sync(sc);
+
+ dc_mii_send(sc, frame->mii_stdelim, 2);
+ dc_mii_send(sc, frame->mii_opcode, 2);
+ dc_mii_send(sc, frame->mii_phyaddr, 5);
+ dc_mii_send(sc, frame->mii_regaddr, 5);
+ dc_mii_send(sc, frame->mii_turnaround, 2);
+ dc_mii_send(sc, frame->mii_data, 16);
+
+ /* Idle bit. */
+ dc_mii_writebit(sc, 0);
+ dc_mii_writebit(sc, 0);
+
+ splx(s);
+
+ return(0);
+}
+
+int dc_miibus_readreg(self, phy, reg)
+ struct device *self;
+ int phy, reg;
+{
+ struct dc_mii_frame frame;
+ struct dc_softc *sc = (struct dc_softc *)self;
+ int i, rval, phy_reg;
+
+ bzero((char *)&frame, sizeof(frame));
+
+ /*
+ * Note: both the AL981 and AN985 have internal PHYs,
+ * however the AL981 provides direct access to the PHY
+ * registers while the AN985 uses a serial MII interface.
+ * The AN985's MII interface is also buggy in that you
+ * can read from any MII address (0 to 31), but only address 1
+ * behaves normally. To deal with both cases, we pretend
+ * that the PHY is at MII address 1.
+ */
+ if (DC_IS_ADMTEK(sc) && phy != DC_ADMTEK_PHYADDR)
+ return(0);
+
+ if (sc->dc_pmode == DC_PMODE_SYM) {
+ if (phy == (MII_NPHY - 1)) {
+ switch(reg) {
+ case MII_BMSR:
+ /*
+ * Fake something to make the probe
+ * code think there's a PHY here.
+ */
+ return(BMSR_MEDIAMASK);
+ break;
+ case MII_PHYIDR1:
+ if (DC_IS_PNIC(sc))
+ return(DC_VENDORID_LO);
+ return(DC_VENDORID_DEC);
+ break;
+ case MII_PHYIDR2:
+ if (DC_IS_PNIC(sc))
+ return(DC_DEVICEID_82C168);
+ return(DC_DEVICEID_21143);
+ break;
+ default:
+ return(0);
+ break;
+ }
+ } else
+ return(0);
+ }
+
+ if (DC_IS_PNIC(sc)) {
+ CSR_WRITE_4(sc, DC_PN_MII, DC_PN_MIIOPCODE_READ |
+ (phy << 23) | (reg << 18));
+ for (i = 0; i < DC_TIMEOUT; i++) {
+ DELAY(1);
+ rval = CSR_READ_4(sc, DC_PN_MII);
+ if (!(rval & DC_PN_MII_BUSY)) {
+ rval &= 0xFFFF;
+ return(rval == 0xFFFF ? 0 : rval);
+ }
+ }
+ return(0);
+ }
+
+ if (DC_IS_COMET(sc)) {
+ switch(reg) {
+ case MII_BMCR:
+ phy_reg = DC_AL_BMCR;
+ break;
+ case MII_BMSR:
+ phy_reg = DC_AL_BMSR;
+ break;
+ case MII_PHYIDR1:
+ phy_reg = DC_AL_VENID;
+ break;
+ case MII_PHYIDR2:
+ phy_reg = DC_AL_DEVID;
+ break;
+ case MII_ANAR:
+ phy_reg = DC_AL_ANAR;
+ break;
+ case MII_ANLPAR:
+ phy_reg = DC_AL_LPAR;
+ break;
+ case MII_ANER:
+ phy_reg = DC_AL_ANER;
+ break;
+ default:
+ printf("dc%d: phy_read: bad phy register %x\n",
+ sc->dc_unit, reg);
+ return(0);
+ break;
+ }
+
+ rval = CSR_READ_4(sc, phy_reg) & 0x0000FFFF;
+
+ if (rval == 0xFFFF)
+ return(0);
+ return(rval);
+ }
+
+ frame.mii_phyaddr = phy;
+ frame.mii_regaddr = reg;
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+ dc_mii_readreg(sc, &frame);
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+
+ return(frame.mii_data);
+}
+
+void dc_miibus_writereg(self, phy, reg, data)
+ struct device *self;
+ int phy, reg, data;
+{
+ struct dc_softc *sc = (struct dc_softc *)self;
+ struct dc_mii_frame frame;
+ int i, phy_reg;
+
+ bzero((char *)&frame, sizeof(frame));
+
+ if (DC_IS_ADMTEK(sc) && phy != DC_ADMTEK_PHYADDR)
+ return;
+
+ if (DC_IS_PNIC(sc)) {
+ CSR_WRITE_4(sc, DC_PN_MII, DC_PN_MIIOPCODE_WRITE |
+ (phy << 23) | (reg << 10) | data);
+ for (i = 0; i < DC_TIMEOUT; i++) {
+ if (!(CSR_READ_4(sc, DC_PN_MII) & DC_PN_MII_BUSY))
+ break;
+ }
+ return;
+ }
+
+ if (DC_IS_COMET(sc)) {
+ switch(reg) {
+ case MII_BMCR:
+ phy_reg = DC_AL_BMCR;
+ break;
+ case MII_BMSR:
+ phy_reg = DC_AL_BMSR;
+ break;
+ case MII_PHYIDR1:
+ phy_reg = DC_AL_VENID;
+ break;
+ case MII_PHYIDR2:
+ phy_reg = DC_AL_DEVID;
+ break;
+ case MII_ANAR:
+ phy_reg = DC_AL_ANAR;
+ break;
+ case MII_ANLPAR:
+ phy_reg = DC_AL_LPAR;
+ break;
+ case MII_ANER:
+ phy_reg = DC_AL_ANER;
+ break;
+ default:
+ printf("dc%d: phy_write: bad phy register %x\n",
+ sc->dc_unit, reg);
+ return;
+ break;
+ }
+
+ CSR_WRITE_4(sc, phy_reg, data);
+ return;
+ }
+
+ frame.mii_phyaddr = phy;
+ frame.mii_regaddr = reg;
+ frame.mii_data = data;
+
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+ dc_mii_writereg(sc, &frame);
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+
+ return;
+}
+
+void dc_miibus_statchg(self)
+ struct device *self;
+{
+ struct dc_softc *sc = (struct dc_softc *)self;
+ struct mii_data *mii;
+
+ if (DC_IS_ADMTEK(sc))
+ return;
+ mii = &sc->sc_mii;
+ dc_setcfg(sc, mii->mii_media_active);
+ sc->dc_if_media = mii->mii_media_active;
+
+ return;
+}
+
+#define DC_POLY 0xEDB88320
+#define DC_BITS 9
+#define DC_BITS_PNIC_II 7
+
+u_int32_t dc_crc_le(sc, addr)
+ struct dc_softc *sc;
+ caddr_t addr;
+{
+ u_int32_t idx, bit, data, crc;
+
+ /* Compute CRC for the address value. */
+ crc = 0xFFFFFFFF; /* initial value */
+
+ for (idx = 0; idx < 6; idx++) {
+ for (data = *addr++, bit = 0; bit < 8; bit++, data >>= 1)
+ crc = (crc >> 1) ^ (((crc ^ data) & 1) ? DC_POLY : 0);
+ }
+
+ /* The hash table on the PNIC II is only 128 bits wide. */
+ if (DC_IS_PNICII(sc))
+ return (crc & ((1 << DC_BITS_PNIC_II) - 1));
+
+ return (crc & ((1 << DC_BITS) - 1));
+}
+
+/*
+ * Calculate CRC of a multicast group address, return the lower 6 bits.
+ */
+u_int32_t dc_crc_be(addr)
+ caddr_t addr;
+{
+ u_int32_t crc, carry;
+ int i, j;
+ u_int8_t c;
+
+ /* Compute CRC for the address value. */
+ crc = 0xFFFFFFFF; /* initial value */
+
+ for (i = 0; i < 6; i++) {
+ c = *(addr + i);
+ for (j = 0; j < 8; j++) {
+ carry = ((crc & 0x80000000) ? 1 : 0) ^ (c & 0x01);
+ crc <<= 1;
+ c >>= 1;
+ if (carry)
+ crc = (crc ^ 0x04c11db6) | carry;
+ }
+ }
+
+ /* return the filter bit position */
+ return((crc >> 26) & 0x0000003F);
+}
+
+/*
+ * 21143-style RX filter setup routine. Filter programming is done by
+ * downloading a special setup frame into the TX engine. 21143, Macronix,
+ * PNIC, PNIC II and Davicom chips are programmed this way.
+ *
+ * We always program the chip using 'hash perfect' mode, i.e. one perfect
+ * address (our node address) and a 512-bit hash filter for multicast
+ * frames. We also sneak the broadcast address into the hash filter since
+ * we need that too.
+ */
+void dc_setfilt_21143(sc)
+ struct dc_softc *sc;
+{
+ struct dc_desc *sframe;
+ u_int32_t h, *sp;
+ struct arpcom *ac = &sc->arpcom;
+ struct ether_multi *enm;
+ struct ether_multistep step;
+ struct ifnet *ifp;
+ int i;
+
+ ifp = &sc->arpcom.ac_if;
+
+ i = sc->dc_cdata.dc_tx_prod;
+ DC_INC(sc->dc_cdata.dc_tx_prod, DC_TX_LIST_CNT);
+ sc->dc_cdata.dc_tx_cnt++;
+ sframe = &sc->dc_ldata->dc_tx_list[i];
+ sp = (u_int32_t *)&sc->dc_cdata.dc_sbuf;
+ bzero((char *)sp, DC_SFRAME_LEN);
+
+ sframe->dc_data = vtophys(&sc->dc_cdata.dc_sbuf);
+ sframe->dc_ctl = DC_SFRAME_LEN | DC_TXCTL_SETUP | DC_TXCTL_TLINK |
+ DC_FILTER_HASHPERF | DC_TXCTL_FINT;
+
+ sc->dc_cdata.dc_tx_chain[i] = (struct mbuf *)&sc->dc_cdata.dc_sbuf;
+
+ /* If we want promiscuous mode, set the allframes bit. */
+ if (ifp->if_flags & IFF_PROMISC)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+
+ if (ifp->if_flags & IFF_ALLMULTI)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+
+ ETHER_FIRST_MULTI(step, ac, enm);
+ while (enm != NULL) {
+ h = dc_crc_le(sc, enm->enm_addrlo);
+ sp[h >> 4] |= 1 << (h & 0xF);
+ ETHER_NEXT_MULTI(step, enm);
+ }
+
+ if (ifp->if_flags & IFF_BROADCAST) {
+ h = dc_crc_le(sc, (caddr_t)&etherbroadcastaddr);
+ sp[h >> 4] |= 1 << (h & 0xF);
+ }
+
+ /* Set our MAC address */
+ sp[39] = ((u_int16_t *)sc->arpcom.ac_enaddr)[0];
+ sp[40] = ((u_int16_t *)sc->arpcom.ac_enaddr)[1];
+ sp[41] = ((u_int16_t *)sc->arpcom.ac_enaddr)[2];
+
+ sframe->dc_status = DC_TXSTAT_OWN;
+ CSR_WRITE_4(sc, DC_TXSTART, 0xFFFFFFFF);
+
+ /*
+ * The PNIC takes an exceedingly long time to process its
+ * setup frame; wait 10ms after posting the setup frame
+ * before proceeding, just so it has time to swallow its
+ * medicine.
+ */
+ DELAY(10000);
+
+ ifp->if_timer = 5;
+
+ return;
+}
+
+void dc_setfilt_admtek(sc)
+ struct dc_softc *sc;
+{
+ struct ifnet *ifp;
+ struct arpcom *ac = &sc->arpcom;
+ struct ether_multi *enm;
+ struct ether_multistep step;
+ int h = 0;
+ u_int32_t hashes[2] = { 0, 0 };
+
+ ifp = &sc->arpcom.ac_if;
+
+ /* Init our MAC address */
+ CSR_WRITE_4(sc, DC_AL_PAR0, *(u_int32_t *)(&sc->arpcom.ac_enaddr[0]));
+ CSR_WRITE_4(sc, DC_AL_PAR1, *(u_int32_t *)(&sc->arpcom.ac_enaddr[4]));
+
+ /* If we want promiscuous mode, set the allframes bit. */
+ if (ifp->if_flags & IFF_PROMISC)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+
+ if (ifp->if_flags & IFF_ALLMULTI)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+
+ /* first, zot all the existing hash bits */
+ CSR_WRITE_4(sc, DC_AL_MAR0, 0);
+ CSR_WRITE_4(sc, DC_AL_MAR1, 0);
+
+ /*
+ * If we're already in promisc or allmulti mode, we
+ * don't have to bother programming the multicast filter.
+ */
+ if (ifp->if_flags & (IFF_PROMISC|IFF_ALLMULTI))
+ return;
+
+ /* now program new ones */
+ ETHER_FIRST_MULTI(step, ac, enm);
+ while (enm != NULL) {
+ h = dc_crc_be(enm->enm_addrlo);
+ if (h < 32)
+ hashes[0] |= (1 << h);
+ else
+ hashes[1] |= (1 << (h - 32));
+ ETHER_NEXT_MULTI(step, enm);
+ }
+
+ CSR_WRITE_4(sc, DC_AL_MAR0, hashes[0]);
+ CSR_WRITE_4(sc, DC_AL_MAR1, hashes[1]);
+
+ return;
+}
+
+void dc_setfilt_asix(sc)
+ struct dc_softc *sc;
+{
+ struct ifnet *ifp;
+ struct arpcom *ac = &sc->arpcom;
+ struct ether_multi *enm;
+ struct ether_multistep step;
+ int h = 0;
+ u_int32_t hashes[2] = { 0, 0 };
+
+ ifp = &sc->arpcom.ac_if;
+
+ /* Init our MAC address */
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_PAR0);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA,
+ *(u_int32_t *)(&sc->arpcom.ac_enaddr[0]));
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_PAR1);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA,
+ *(u_int32_t *)(&sc->arpcom.ac_enaddr[4]));
+
+ /* If we want promiscuous mode, set the allframes bit. */
+ if (ifp->if_flags & IFF_PROMISC)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_PROMISC);
+
+ if (ifp->if_flags & IFF_ALLMULTI)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_RX_ALLMULTI);
+
+ /*
+ * The ASIX chip has a special bit to enable reception
+ * of broadcast frames.
+ */
+ if (ifp->if_flags & IFF_BROADCAST)
+ DC_SETBIT(sc, DC_NETCFG, DC_AX_NETCFG_RX_BROAD);
+ else
+ DC_CLRBIT(sc, DC_NETCFG, DC_AX_NETCFG_RX_BROAD);
+
+ /* first, zot all the existing hash bits */
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_MAR0);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA, 0);
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_MAR1);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA, 0);
+
+ /*
+ * If we're already in promisc or allmulti mode, we
+ * don't have to bother programming the multicast filter.
+ */
+ if (ifp->if_flags & (IFF_PROMISC|IFF_ALLMULTI))
+ return;
+
+ /* now program new ones */
+ ETHER_FIRST_MULTI(step, ac, enm);
+ while (enm != NULL) {
+ h = dc_crc_be(enm->enm_addrlo);
+ if (h < 32)
+ hashes[0] |= (1 << h);
+ else
+ hashes[1] |= (1 << (h - 32));
+ ETHER_NEXT_MULTI(step, enm);
+ }
+
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_MAR0);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA, hashes[0]);
+ CSR_WRITE_4(sc, DC_AX_FILTIDX, DC_AX_FILTIDX_MAR1);
+ CSR_WRITE_4(sc, DC_AX_FILTDATA, hashes[1]);
+
+ return;
+}
+
+void dc_setfilt(sc)
+ struct dc_softc *sc;
+{
+ if (DC_IS_INTEL(sc) || DC_IS_MACRONIX(sc) || DC_IS_PNIC(sc) ||
+ DC_IS_PNICII(sc) || DC_IS_DAVICOM(sc))
+ dc_setfilt_21143(sc);
+
+ if (DC_IS_ASIX(sc))
+ dc_setfilt_asix(sc);
+
+ if (DC_IS_ADMTEK(sc))
+ dc_setfilt_admtek(sc);
+
+ return;
+}
+
+/*
+ * In order to fiddle with the
+ * 'full-duplex' and '100Mbps' bits in the netconfig register, we
+ * first have to put the transmit and/or receive logic in the idle state.
+ */
+void dc_setcfg(sc, media)
+ struct dc_softc *sc;
+ int media;
+{
+ int i, restart = 0;
+ u_int32_t isr;
+
+ if (IFM_SUBTYPE(media) == IFM_NONE)
+ return;
+
+ if (CSR_READ_4(sc, DC_NETCFG) & (DC_NETCFG_TX_ON|DC_NETCFG_RX_ON)) {
+ restart = 1;
+ DC_CLRBIT(sc, DC_NETCFG, (DC_NETCFG_TX_ON|DC_NETCFG_RX_ON));
+
+ for (i = 0; i < DC_TIMEOUT; i++) {
+ DELAY(10);
+ isr = CSR_READ_4(sc, DC_ISR);
+ if (isr & DC_ISR_TX_IDLE ||
+ (isr & DC_ISR_RX_STATE) == DC_RXSTATE_STOPPED)
+ break;
+ }
+
+ if (i == DC_TIMEOUT)
+ printf("dc%d: failed to force tx and "
+ "rx to idle state\n", sc->dc_unit);
+
+ }
+
+ if (IFM_SUBTYPE(media) == IFM_100_TX) {
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_SPEEDSEL);
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_HEARTBEAT);
+ if (sc->dc_pmode == DC_PMODE_MII) {
+ DC_SETBIT(sc, DC_WATCHDOG, DC_WDOG_JABBERDIS);
+ DC_CLRBIT(sc, DC_NETCFG, (DC_NETCFG_PCS|
+ DC_NETCFG_PORTSEL|DC_NETCFG_SCRAMBLER));
+ if (sc->dc_type == DC_TYPE_98713)
+ DC_SETBIT(sc, DC_NETCFG, (DC_NETCFG_PCS|
+ DC_NETCFG_SCRAMBLER));
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+ DC_CLRBIT(sc, DC_10BTCTRL, 0xFFFF);
+ } else {
+ if (DC_IS_PNIC(sc)) {
+ DC_PN_GPIO_SETBIT(sc, DC_PN_GPIO_SPEEDSEL);
+ DC_PN_GPIO_SETBIT(sc, DC_PN_GPIO_100TX_LOOP);
+ DC_SETBIT(sc, DC_PN_NWAY, DC_PN_NWAY_SPEEDSEL);
+ }
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL|
+ DC_NETCFG_PCS|DC_NETCFG_SCRAMBLER);
+ }
+ }
+
+ if (IFM_SUBTYPE(media) == IFM_10_T) {
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_SPEEDSEL);
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_HEARTBEAT);
+ if (sc->dc_pmode == DC_PMODE_MII) {
+ DC_SETBIT(sc, DC_WATCHDOG, DC_WDOG_JABBERDIS);
+ DC_CLRBIT(sc, DC_NETCFG, (DC_NETCFG_PCS|
+ DC_NETCFG_PORTSEL|DC_NETCFG_SCRAMBLER));
+ if (sc->dc_type == DC_TYPE_98713)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PCS);
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+ DC_CLRBIT(sc, DC_10BTCTRL, 0xFFFF);
+ } else {
+ if (DC_IS_PNIC(sc)) {
+ DC_PN_GPIO_CLRBIT(sc, DC_PN_GPIO_SPEEDSEL);
+ DC_PN_GPIO_SETBIT(sc, DC_PN_GPIO_100TX_LOOP);
+ DC_CLRBIT(sc, DC_PN_NWAY, DC_PN_NWAY_SPEEDSEL);
+ }
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_PORTSEL);
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_SCRAMBLER);
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_PCS);
+ }
+ }
+
+ if ((media & IFM_GMASK) == IFM_FDX) {
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
+ if (sc->dc_pmode == DC_PMODE_SYM && DC_IS_PNIC(sc))
+ DC_SETBIT(sc, DC_PN_NWAY, DC_PN_NWAY_DUPLEX);
+ } else {
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_FULLDUPLEX);
+ if (sc->dc_pmode == DC_PMODE_SYM && DC_IS_PNIC(sc))
+ DC_CLRBIT(sc, DC_PN_NWAY, DC_PN_NWAY_DUPLEX);
+ }
+
+ if (restart)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_TX_ON|DC_NETCFG_RX_ON);
+
+ return;
+}
+
+void dc_reset(sc)
+ struct dc_softc *sc;
+{
+ register int i;
+
+ DC_SETBIT(sc, DC_BUSCTL, DC_BUSCTL_RESET);
+
+ for (i = 0; i < DC_TIMEOUT; i++) {
+ DELAY(10);
+ if (!(CSR_READ_4(sc, DC_BUSCTL) & DC_BUSCTL_RESET))
+ break;
+ }
+
+ if (DC_IS_ASIX(sc) || DC_IS_ADMTEK(sc)) {
+ DELAY(10000);
+ DC_CLRBIT(sc, DC_BUSCTL, DC_BUSCTL_RESET);
+ i = 0;
+ }
+
+ if (i == DC_TIMEOUT)
+ printf("dc%d: reset never completed!\n", sc->dc_unit);
+
+ /* Wait a little while for the chip to get its brains in order. */
+ DELAY(1000);
+
+ CSR_WRITE_4(sc, DC_IMR, 0x00000000);
+ CSR_WRITE_4(sc, DC_BUSCTL, 0x00000000);
+ CSR_WRITE_4(sc, DC_NETCFG, 0x00000000);
+
+ return;
+}
+
+struct dc_type *dc_devtype(aux)
+ void *aux;
+{
+ struct pci_attach_args *pa = (struct pci_attach_args *)aux;
+ struct dc_type *t;
+ pci_chipset_tag_t pc = pa->pa_pc;
+ u_int32_t rev;
+
+ t = dc_devs;
+
+ while(t->dc_name != NULL) {
+ if ((PCI_VENDOR(pa->pa_id) == t->dc_vid) &&
+ (PCI_PRODUCT(pa->pa_id) == t->dc_did)) {
+ /* Check the PCI revision */
+ rev = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFRV) & 0xFF;
+ if (t->dc_did == DC_DEVICEID_98713 &&
+ rev >= DC_REVISION_98713A)
+ t++;
+ if (t->dc_did == DC_DEVICEID_98713_CP &&
+ rev >= DC_REVISION_98713A)
+ t++;
+ if (t->dc_did == DC_DEVICEID_987x5 &&
+ rev >= DC_REVISION_98725)
+ t++;
+ if (t->dc_did == DC_DEVICEID_AX88140A &&
+ rev >= DC_REVISION_88141)
+ t++;
+ if (t->dc_did == DC_DEVICEID_82C168 &&
+ rev >= DC_REVISION_82C169)
+ t++;
+ return(t);
+ }
+ t++;
+ }
+
+ return(NULL);
+}
+
+/*
+ * Probe for a 21143 or clone chip. Check the PCI vendor and device
+ * IDs against our list and return a device name if we find a match.
+ * We do a little bit of extra work to identify the exact type of
+ * chip. The MX98713 and MX98713A have the same PCI vendor/device ID,
+ * but different revision IDs. The same is true for 98715/98715A
+ * chips and the 98725, as well as the ASIX and ADMtek chips. In some
+ * cases, the exact chip revision affects driver behavior.
+ */
+int dc_probe(parent, match, aux)
+ struct device *parent;
+ void *match, *aux;
+{
+ struct dc_type *t;
+
+ t = dc_devtype(aux);
+
+ if (t != NULL)
+ return(1);
+
+ return(0);
+}
+
+void dc_acpi(self, aux)
+ struct device *self;
+ void *aux;
+{
+ struct dc_softc *sc = (struct dc_softc *)self;
+ struct pci_attach_args *pa = (struct pci_attach_args *)aux;
+ pci_chipset_tag_t pc = pa->pa_pc;
+ u_int32_t r, cptr;
+ int unit;
+
+ unit = sc->dc_unit;
+
+ /* Find the location of the capabilities block */
+ cptr = pci_conf_read(pc, pa->pa_tag, DC_PCI_CCAP) & 0xFF;
+
+ r = pci_conf_read(pc, pa->pa_tag, cptr) & 0xFF;
+ if (r == 0x01) {
+
+ r = pci_conf_read(pc, pa->pa_tag, cptr + 4);
+ if (r & DC_PSTATE_D3) {
+ u_int32_t iobase, membase, irq;
+
+ /* Save important PCI config data. */
+ iobase = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFBIO);
+ membase = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFBMA);
+ irq = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFIT);
+
+ /* Reset the power state. */
+ printf("dc%d: chip is in D%d power mode "
+ "-- setting to D0\n", unit, r & DC_PSTATE_D3);
+ r &= 0xFFFFFFFC;
+ pci_conf_write(pc, pa->pa_tag, cptr + 4, r);
+
+ /* Restore PCI config data. */
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CFBIO, iobase);
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CFBMA, membase);
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CFIT, irq);
+ }
+ }
+ return;
+}
+
+/*
+ * Attach the interface. Allocate softc structures, do ifmedia
+ * setup and ethernet/BPF attach.
+ */
+void dc_attach(parent, self, aux)
+ struct device *parent, *self;
+ void *aux;
+{
+ int s;
+ const char *intrstr = NULL;
+ u_int32_t command;
+ struct dc_softc *sc = (struct dc_softc *)self;
+ struct pci_attach_args *pa = aux;
+ pci_chipset_tag_t pc = pa->pa_pc;
+ pci_intr_handle_t ih;
+ struct ifnet *ifp;
+ bus_addr_t iobase;
+ bus_size_t iosize;
+ u_int32_t revision;
+ int mac_offset;
+
+ s = splimp();
+ sc->dc_unit = sc->sc_dev.dv_unit;
+
+ /*
+ * Handle power management nonsense.
+ */
+ dc_acpi(self, aux);
+
+ /*
+ * Map control/status registers.
+ */
+ command = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
+ command |= PCI_COMMAND_IO_ENABLE | PCI_COMMAND_MEM_ENABLE |
+ PCI_COMMAND_MASTER_ENABLE;
+ pci_conf_write(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG, command);
+ command = pci_conf_read(pc, pa->pa_tag, PCI_COMMAND_STATUS_REG);
+
+#ifdef DC_USEIOSPACE
+ if (!(command & PCI_COMMAND_IO_ENABLE)) {
+ printf(": failed to enable I/O ports\n");
+ goto fail;
+ }
+ if (pci_io_find(pc, pa->pa_tag, DC_PCI_CFBIO, &iobase, &iosize)) {
+ printf(": can't find I/O space\n");
+ goto fail;
+ }
+ if (bus_space_map(pa->pa_iot, iobase, iosize, 0, &sc->dc_bhandle)) {
+ printf(": can't map I/O space\n");
+ goto fail;
+ }
+ sc->dc_btag = pa->pa_iot;
+#else
+ if (!(command & PCI_COMMAND_MEM_ENABLE)) {
+ printf(": failed to enable memory mapping\n");
+ goto fail;
+ }
+ if (pci_mem_find(pc, pa->pa_tag, DC_PCI_CFBMA, &iobase, &iosize, NULL)){
+ printf(": can't find mem space\n");
+ goto fail;
+ }
+ if (bus_space_map(pa->pa_memt, iobase, iosize, 0, &sc->dc_bhandle)) {
+ printf(": can't map mem space\n");
+ goto fail;
+ }
+ sc->dc_btag = pa->pa_memt;
+#endif
+
+ /* Allocate interrupt */
+ if (pci_intr_map(pc, pa->pa_intrtag, pa->pa_intrpin, pa->pa_intrline,
+ &ih)) {
+ printf(": couldn't map interrupt\n");
+ goto fail;
+ }
+ intrstr = pci_intr_string(pc, ih);
+ sc->sc_ih = pci_intr_establish(pc, ih, IPL_NET, dc_intr, sc,
+ self->dv_xname);
+ if (sc->sc_ih == NULL) {
+ printf(": couldn't establish interrupt");
+ if (intrstr != NULL)
+ printf(" at %s", intrstr);
+ printf("\n");
+ goto fail;
+ }
+ printf(": %s", intrstr);
+
+ /* Need this info to decide on a chip type. */
+ sc->dc_info = dc_devtype(aux);
+ revision = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFRV) & 0x000000FF;
+
+ switch(sc->dc_info->dc_did) {
+ case DC_DEVICEID_21143:
+ sc->dc_type = DC_TYPE_21143;
+ sc->dc_flags |= DC_TX_POLL|DC_TX_USE_TX_INTR;
+ sc->dc_flags |= DC_REDUCED_MII_POLL;
+ break;
+ case DC_DEVICEID_DM9100:
+ case DC_DEVICEID_DM9102:
+ sc->dc_type = DC_TYPE_DM9102;
+ sc->dc_flags |= DC_TX_USE_TX_INTR;
+ sc->dc_flags |= DC_REDUCED_MII_POLL;
+ sc->dc_pmode = DC_PMODE_MII;
+ break;
+ case DC_DEVICEID_AL981:
+ sc->dc_type = DC_TYPE_AL981;
+ sc->dc_flags |= DC_TX_USE_TX_INTR;
+ sc->dc_flags |= DC_TX_ADMTEK_WAR;
+ sc->dc_pmode = DC_PMODE_MII;
+ break;
+ case DC_DEVICEID_AN985:
+ sc->dc_type = DC_TYPE_AN985;
+ sc->dc_flags |= DC_TX_USE_TX_INTR;
+ sc->dc_flags |= DC_TX_ADMTEK_WAR;
+ sc->dc_pmode = DC_PMODE_MII;
+ break;
+ case DC_DEVICEID_98713:
+ case DC_DEVICEID_98713_CP:
+ if (revision < DC_REVISION_98713A) {
+ sc->dc_type = DC_TYPE_98713;
+ sc->dc_flags |= DC_REDUCED_MII_POLL;
+ }
+ if (revision >= DC_REVISION_98713A)
+ sc->dc_type = DC_TYPE_98713A;
+ sc->dc_flags |= DC_TX_POLL|DC_TX_USE_TX_INTR;
+ break;
+ case DC_DEVICEID_987x5:
+ sc->dc_type = DC_TYPE_987x5;
+ sc->dc_flags |= DC_TX_POLL|DC_TX_USE_TX_INTR;
+ break;
+ case DC_DEVICEID_82C115:
+ sc->dc_type = DC_TYPE_PNICII;
+ sc->dc_flags |= DC_TX_POLL|DC_TX_USE_TX_INTR;
+ break;
+ case DC_DEVICEID_82C168:
+ sc->dc_type = DC_TYPE_PNIC;
+ sc->dc_flags |= DC_TX_STORENFWD|DC_TX_USE_TX_INTR;
+ sc->dc_flags |= DC_PNIC_RX_BUG_WAR;
+ sc->dc_pnic_rx_buf = malloc(DC_RXLEN * 5, M_DEVBUF, M_NOWAIT);
+ if (revision < DC_REVISION_82C169)
+ sc->dc_pmode = DC_PMODE_SYM;
+ break;
+ case DC_DEVICEID_AX88140A:
+ sc->dc_type = DC_TYPE_ASIX;
+ sc->dc_flags |= DC_TX_USE_TX_INTR|DC_TX_INTR_FIRSTFRAG;
+ sc->dc_flags |= DC_REDUCED_MII_POLL;
+ sc->dc_pmode = DC_PMODE_MII;
+ break;
+ default:
+ printf("%d: unknown device: %x\n", sc->dc_unit,
+ sc->dc_info->dc_did);
+ break;
+ }
+
+ /* Save the cache line size. */
+ sc->dc_cachesize = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFLT) & 0xFF;
+
+ /* Reset the adapter. */
+ dc_reset(sc);
+
+ /* Take 21143 out of snooze mode */
+ if (DC_IS_INTEL(sc)) {
+ command = pci_conf_read(pc, pa->pa_tag, DC_PCI_CFDD);
+ command &= ~(DC_CFDD_SNOOZE_MODE|DC_CFDD_SLEEP_MODE);
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CFDD, command);
+ }
+
+ /*
+ * Try to learn something about the supported media.
+ * We know that ASIX and ADMtek and Davicom devices
+ * will *always* be using MII media, so that's a no-brainer.
+ * The tricky ones are the Macronix/PNIC II and the
+ * Intel 21143.
+ */
+ if (DC_IS_INTEL(sc)) {
+ u_int32_t media, cwuc;
+ cwuc = pci_conf_read(pc, pa->pa_tag, DC_PCI_CWUC);
+ cwuc |= DC_CWUC_FORCE_WUL;
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CWUC, cwuc);
+ DELAY(10000);
+ media = pci_conf_read(pc, pa->pa_tag, DC_PCI_CWUC);
+ cwuc &= ~DC_CWUC_FORCE_WUL;
+ pci_conf_write(pc, pa->pa_tag, DC_PCI_CWUC, cwuc);
+ DELAY(10000);
+ if (media & DC_CWUC_MII_ABILITY)
+ sc->dc_pmode = DC_PMODE_MII;
+ if (media & DC_CWUC_SYM_ABILITY)
+ sc->dc_pmode = DC_PMODE_SYM;
+ /*
+ * If none of the bits are set, then this NIC
+ * isn't meant to support 'wake up LAN' mode.
+ * This is usually only the case on multiport
+ * cards, and these cards almost always have
+ * MII transceivers.
+ */
+ if (media == 0)
+ sc->dc_pmode = DC_PMODE_MII;
+ } else if (DC_IS_MACRONIX(sc) || DC_IS_PNICII(sc)) {
+ if (sc->dc_type == DC_TYPE_98713)
+ sc->dc_pmode = DC_PMODE_MII;
+ else
+ sc->dc_pmode = DC_PMODE_SYM;
+ } else if (!sc->dc_pmode)
+ sc->dc_pmode = DC_PMODE_MII;
+
+ /*
+ * Get station address from the EEPROM.
+ */
+ switch(sc->dc_type) {
+ case DC_TYPE_98713:
+ case DC_TYPE_98713A:
+ case DC_TYPE_987x5:
+ case DC_TYPE_PNICII:
+ dc_read_eeprom(sc, (caddr_t)&mac_offset,
+ (DC_EE_NODEADDR_OFFSET / 2), 1, 0);
+ dc_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
+ (mac_offset / 2), 3, 0);
+ break;
+ case DC_TYPE_PNIC:
+ dc_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr, 0, 3, 1);
+ break;
+ case DC_TYPE_DM9102:
+ case DC_TYPE_21143:
+ case DC_TYPE_ASIX:
+ dc_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
+ DC_EE_NODEADDR, 3, 0);
+ break;
+ case DC_TYPE_AL981:
+ case DC_TYPE_AN985:
+ dc_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
+ DC_AL_EE_NODEADDR, 3, 0);
+ break;
+ default:
+ dc_read_eeprom(sc, (caddr_t)&sc->arpcom.ac_enaddr,
+ DC_EE_NODEADDR, 3, 0);
+ break;
+ }
+
+ /*
+ * A 21143 or clone chip was detected. Inform the world.
+ */
+ printf(" address %s\n", ether_sprintf(sc->arpcom.ac_enaddr));
+
+ sc->dc_ldata_ptr = malloc(sizeof(struct dc_list_data), M_DEVBUF,
+ M_NOWAIT);
+ if (sc->dc_ldata_ptr == NULL) {
+ printf("%s: no memory for list buffers!\n", sc->dc_unit);
+ goto fail;
+ }
+
+ sc->dc_ldata = (struct dc_list_data *)sc->dc_ldata_ptr;
+ bzero(sc->dc_ldata, sizeof(struct dc_list_data));
+
+ ifp = &sc->arpcom.ac_if;
+ ifp->if_softc = sc;
+ ifp->if_mtu = ETHERMTU;
+ ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
+ ifp->if_ioctl = dc_ioctl;
+ ifp->if_output = ether_output;
+ ifp->if_start = dc_start;
+ ifp->if_watchdog = dc_watchdog;
+ ifp->if_baudrate = 10000000;
+ ifp->if_snd.ifq_maxlen = DC_TX_LIST_CNT - 1;
+ bcopy(sc->sc_dev.dv_xname, ifp->if_xname, IFNAMSIZ);
+
+ sc->sc_mii.mii_ifp = ifp;
+ sc->sc_mii.mii_readreg = dc_miibus_readreg;
+ sc->sc_mii.mii_writereg = dc_miibus_writereg;
+ sc->sc_mii.mii_statchg = dc_miibus_statchg;
+ ifmedia_init(&sc->sc_mii.mii_media, 0, dc_ifmedia_upd, dc_ifmedia_sts);
+ mii_phy_probe(self, &sc->sc_mii, 0xffffffff);
+ if (LIST_FIRST(&sc->sc_mii.mii_phys) == NULL) {
+ ifmedia_add(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE, 0, NULL);
+ ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_NONE);
+ } else
+ ifmedia_set(&sc->sc_mii.mii_media, IFM_ETHER|IFM_AUTO);
+
+ /* if (error && DC_IS_INTEL(sc)) {
+ sc->dc_pmode = DC_PMODE_SYM;
+ mii_phy_probe(dev, &sc->dc_miibus,
+ dc_ifmedia_upd, dc_ifmedia_sts);
+ error = 0;
+ }
+
+ if (error) {
+ printf("dc%d: MII without any PHY!\n", sc->dc_unit);
+ bus_teardown_intr(dev, sc->dc_irq, sc->dc_intrhand);
+ bus_release_resource(dev, SYS_RES_IRQ, 0, sc->dc_irq);
+ bus_release_resource(dev, DC_RES, DC_RID, sc->dc_res);
+ error = ENXIO;
+ goto fail;
+ } */
+
+ /*
+ * Call MI attach routines.
+ */
+ if_attach(ifp);
+ ether_ifattach(ifp);
+
+#if NBPFILTER > 0
+ bpfattach(&sc->arpcom.ac_if.if_bpf, ifp, DLT_EN10MB,
+ sizeof(struct ether_header));
+#endif
+ shutdownhook_establish(dc_shutdown, sc);
+
+fail:
+ splx(s);
+ return;
+}
+
+/*
+ * Initialize the transmit descriptors.
+ */
+int dc_list_tx_init(sc)
+ struct dc_softc *sc;
+{
+ struct dc_chain_data *cd;
+ struct dc_list_data *ld;
+ int i;
+
+ cd = &sc->dc_cdata;
+ ld = sc->dc_ldata;
+ for (i = 0; i < DC_TX_LIST_CNT; i++) {
+ if (i == (DC_TX_LIST_CNT - 1)) {
+ ld->dc_tx_list[i].dc_next =
+ vtophys(&ld->dc_tx_list[0]);
+ } else {
+ ld->dc_tx_list[i].dc_next =
+ vtophys(&ld->dc_tx_list[i + 1]);
+ }
+ cd->dc_tx_chain[i] = NULL;
+ ld->dc_tx_list[i].dc_data = 0;
+ ld->dc_tx_list[i].dc_ctl = 0;
+ }
+
+ cd->dc_tx_prod = cd->dc_tx_cons = cd->dc_tx_cnt = 0;
+
+ return(0);
+}
+
+
+/*
+ * Initialize the RX descriptors and allocate mbufs for them. Note that
+ * we arrange the descriptors in a closed ring, so that the last descriptor
+ * points back to the first.
+ */
+int dc_list_rx_init(sc)
+ struct dc_softc *sc;
+{
+ struct dc_chain_data *cd;
+ struct dc_list_data *ld;
+ int i;
+
+ cd = &sc->dc_cdata;
+ ld = sc->dc_ldata;
+
+ for (i = 0; i < DC_RX_LIST_CNT; i++) {
+ if (dc_newbuf(sc, i, NULL) == ENOBUFS)
+ return(ENOBUFS);
+ if (i == (DC_RX_LIST_CNT - 1)) {
+ ld->dc_rx_list[i].dc_next =
+ vtophys(&ld->dc_rx_list[0]);
+ } else {
+ ld->dc_rx_list[i].dc_next =
+ vtophys(&ld->dc_rx_list[i + 1]);
+ }
+ }
+
+ cd->dc_rx_prod = 0;
+
+ return(0);
+}
+
+/*
+ * Initialize an RX descriptor and attach an MBUF cluster.
+ */
+int dc_newbuf(sc, i, m)
+ struct dc_softc *sc;
+ int i;
+ struct mbuf *m;
+{
+ struct mbuf *m_new = NULL;
+ struct dc_desc *c;
+
+ c = &sc->dc_ldata->dc_rx_list[i];
+
+ if (m == NULL) {
+ MGETHDR(m_new, M_DONTWAIT, MT_DATA);
+ if (m_new == NULL) {
+ printf("dc%d: no memory for rx list "
+ "-- packet dropped!\n", sc->dc_unit);
+ return(ENOBUFS);
+ }
+
+ MCLGET(m_new, M_DONTWAIT);
+ if (!(m_new->m_flags & M_EXT)) {
+ printf("dc%d: no memory for rx list "
+ "-- packet dropped!\n", sc->dc_unit);
+ m_freem(m_new);
+ return(ENOBUFS);
+ }
+ m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
+ } else {
+ m_new = m;
+ m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
+ m_new->m_data = m_new->m_ext.ext_buf;
+ }
+
+ m_adj(m_new, sizeof(u_int64_t));
+
+ /*
+ * If this is a PNIC chip, zero the buffer. This is part
+ * of the workaround for the receive bug in the 82c168 and
+ * 82c169 chips.
+ */
+ if (sc->dc_flags & DC_PNIC_RX_BUG_WAR)
+ bzero((char *)mtod(m_new, char *), m_new->m_len);
+
+ sc->dc_cdata.dc_rx_chain[i] = m_new;
+ c->dc_data = vtophys(mtod(m_new, caddr_t));
+ c->dc_ctl = DC_RXCTL_RLINK | DC_RXLEN;
+ c->dc_status = DC_RXSTAT_OWN;
+
+ return(0);
+}
+
+/*
+ * Grrrrr.
+ * The PNIC chip has a terrible bug in it that manifests itself during
+ * periods of heavy activity. The exact mode of failure if difficult to
+ * pinpoint: sometimes it only happens in promiscuous mode, sometimes it
+ * will happen on slow machines. The bug is that sometimes instead of
+ * uploading one complete frame during reception, it uploads what looks
+ * like the entire contents of its FIFO memory. The frame we want is at
+ * the end of the whole mess, but we never know exactly how much data has
+ * been uploaded, so salvaging the frame is hard.
+ *
+ * There is only one way to do it reliably, and it's disgusting.
+ * Here's what we know:
+ *
+ * - We know there will always be somewhere between one and three extra
+ * descriptors uploaded.
+ *
+ * - We know the desired received frame will always be at the end of the
+ * total data upload.
+ *
+ * - We know the size of the desired received frame because it will be
+ * provided in the length field of the status word in the last descriptor.
+ *
+ * Here's what we do:
+ *
+ * - When we allocate buffers for the receive ring, we bzero() them.
+ * This means that we know that the buffer contents should be all
+ * zeros, except for data uploaded by the chip.
+ *
+ * - We also force the PNIC chip to upload frames that include the
+ * ethernet CRC at the end.
+ *
+ * - We gather all of the bogus frame data into a single buffer.
+ *
+ * - We then position a pointer at the end of this buffer and scan
+ * backwards until we encounter the first non-zero byte of data.
+ * This is the end of the received frame. We know we will encounter
+ * some data at the end of the frame because the CRC will always be
+ * there, so even if the sender transmits a packet of all zeros,
+ * we won't be fooled.
+ *
+ * - We know the size of the actual received frame, so we subtract
+ * that value from the current pointer location. This brings us
+ * to the start of the actual received packet.
+ *
+ * - We copy this into an mbuf and pass it on, along with the actual
+ * frame length.
+ *
+ * The performance hit is tremendous, but it beats dropping frames all
+ * the time.
+ */
+
+#define DC_WHOLEFRAME (DC_RXSTAT_FIRSTFRAG|DC_RXSTAT_LASTFRAG)
+void dc_pnic_rx_bug_war(sc, idx)
+ struct dc_softc *sc;
+ int idx;
+{
+ struct dc_desc *cur_rx;
+ struct dc_desc *c = NULL;
+ struct mbuf *m = NULL;
+ unsigned char *ptr;
+ int i, total_len;
+ u_int32_t rxstat = 0;
+
+ i = sc->dc_pnic_rx_bug_save;
+ cur_rx = &sc->dc_ldata->dc_rx_list[idx];
+ ptr = sc->dc_pnic_rx_buf;
+ bzero(ptr, sizeof(DC_RXLEN * 5));
+
+ /* Copy all the bytes from the bogus buffers. */
+ while (1) {
+ c = &sc->dc_ldata->dc_rx_list[i];
+ rxstat = c->dc_status;
+ m = sc->dc_cdata.dc_rx_chain[i];
+ bcopy(mtod(m, char *), ptr, DC_RXLEN);
+ ptr += DC_RXLEN;
+ /* If this is the last buffer, break out. */
+ if (i == idx || rxstat & DC_RXSTAT_LASTFRAG)
+ break;
+ dc_newbuf(sc, i, m);
+ DC_INC(i, DC_RX_LIST_CNT);
+ }
+
+ /* Find the length of the actual receive frame. */
+ total_len = DC_RXBYTES(rxstat);
+
+ /* Scan backwards until we hit a non-zero byte. */
+ while(*ptr == 0x00)
+ ptr--;
+
+ /* Round off. */
+ if ((unsigned long)(ptr) & 0x3)
+ ptr -= 1;
+
+ /* Now find the start of the frame. */
+ ptr -= total_len;
+ if (ptr < sc->dc_pnic_rx_buf)
+ ptr = sc->dc_pnic_rx_buf;
+
+ /*
+ * Now copy the salvaged frame to the last mbuf and fake up
+ * the status word to make it look like a successful
+ * frame reception.
+ */
+ dc_newbuf(sc, i, m);
+ bcopy(ptr, mtod(m, char *), total_len);
+ cur_rx->dc_status = rxstat | DC_RXSTAT_FIRSTFRAG;
+
+ return;
+}
+
+/*
+ * A frame has been uploaded: pass the resulting mbuf chain up to
+ * the higher level protocols.
+ */
+void dc_rxeof(sc)
+ struct dc_softc *sc;
+{
+ struct ether_header *eh;
+ struct mbuf *m;
+ struct ifnet *ifp;
+ struct dc_desc *cur_rx;
+ int i, total_len = 0;
+ u_int32_t rxstat;
+
+ ifp = &sc->arpcom.ac_if;
+ i = sc->dc_cdata.dc_rx_prod;
+
+ while(!(sc->dc_ldata->dc_rx_list[i].dc_status & DC_RXSTAT_OWN)) {
+ struct mbuf *m0 = NULL;
+
+ cur_rx = &sc->dc_ldata->dc_rx_list[i];
+ rxstat = cur_rx->dc_status;
+ m = sc->dc_cdata.dc_rx_chain[i];
+ total_len = DC_RXBYTES(rxstat);
+
+ if (sc->dc_flags & DC_PNIC_RX_BUG_WAR) {
+ if ((rxstat & DC_WHOLEFRAME) != DC_WHOLEFRAME) {
+ if (rxstat & DC_RXSTAT_FIRSTFRAG)
+ sc->dc_pnic_rx_bug_save = i;
+ if ((rxstat & DC_RXSTAT_LASTFRAG) == 0) {
+ DC_INC(i, DC_RX_LIST_CNT);
+ continue;
+ }
+ dc_pnic_rx_bug_war(sc, i);
+ rxstat = cur_rx->dc_status;
+ total_len = DC_RXBYTES(rxstat);
+ }
+ }
+
+ sc->dc_cdata.dc_rx_chain[i] = NULL;
+
+ /*
+ * If an error occurs, update stats, clear the
+ * status word and leave the mbuf cluster in place:
+ * it should simply get re-used next time this descriptor
+ * comes up in the ring.
+ */
+ if (rxstat & DC_RXSTAT_RXERR) {
+ ifp->if_ierrors++;
+ if (rxstat & DC_RXSTAT_COLLSEEN)
+ ifp->if_collisions++;
+ dc_newbuf(sc, i, m);
+ if (rxstat & DC_RXSTAT_CRCERR) {
+ DC_INC(i, DC_RX_LIST_CNT);
+ continue;
+ } else {
+ dc_init(sc);
+ return;
+ }
+ }
+
+ /* No errors; receive the packet. */
+ total_len -= ETHER_CRC_LEN;
+
+ m0 = m_devget(mtod(m, char *) - ETHER_ALIGN,
+ total_len + ETHER_ALIGN, 0, ifp, NULL);
+ dc_newbuf(sc, i, m);
+ DC_INC(i, DC_RX_LIST_CNT);
+ if (m0 == NULL) {
+ ifp->if_ierrors++;
+ continue;
+ }
+ m_adj(m0, ETHER_ALIGN);
+ m = m0;
+
+ ifp->if_ipackets++;
+ eh = mtod(m, struct ether_header *);
+
+#if NBPFILTER > 0
+ if (ifp->if_bpf)
+ bpf_mtap(ifp->if_bpf, m);
+#endif
+
+ /* Remove header from mbuf and pass it on. */
+ m_adj(m, sizeof(struct ether_header));
+ ether_input(ifp, eh, m);
+ }
+
+ sc->dc_cdata.dc_rx_prod = i;
+
+ return;
+}
+
+/*
+ * A frame was downloaded to the chip. It's safe for us to clean up
+ * the list buffers.
+ */
+
+void dc_txeof(sc)
+ struct dc_softc *sc;
+{
+ struct dc_desc *cur_tx = NULL;
+ struct ifnet *ifp;
+ int idx;
+
+ ifp = &sc->arpcom.ac_if;
+
+ /* Clear the timeout timer. */
+ ifp->if_timer = 0;
+
+ /*
+ * Go through our tx list and free mbufs for those
+ * frames that have been transmitted.
+ */
+ idx = sc->dc_cdata.dc_tx_cons;
+ while(idx != sc->dc_cdata.dc_tx_prod) {
+ u_int32_t txstat;
+
+ cur_tx = &sc->dc_ldata->dc_tx_list[idx];
+ txstat = cur_tx->dc_status;
+
+ if (txstat & DC_TXSTAT_OWN)
+ break;
+
+ if (!(cur_tx->dc_ctl & DC_TXCTL_LASTFRAG) ||
+ cur_tx->dc_ctl & DC_TXCTL_SETUP) {
+ sc->dc_cdata.dc_tx_cnt--;
+ if (cur_tx->dc_ctl & DC_TXCTL_SETUP) {
+ /*
+ * Yes, the PNIC is so brain damaged
+ * that it will sometimes generate a TX
+ * underrun error while DMAing the RX
+ * filter setup frame. If we detect this,
+ * we have to send the setup frame again,
+ * or else the filter won't be programmed
+ * correctly.
+ */
+ if (DC_IS_PNIC(sc)) {
+ if (txstat & DC_TXSTAT_ERRSUM)
+ dc_setfilt(sc);
+ }
+ sc->dc_cdata.dc_tx_chain[idx] = NULL;
+ }
+ DC_INC(idx, DC_TX_LIST_CNT);
+ continue;
+ }
+
+ if (/*sc->dc_type == DC_TYPE_21143 &&*/
+ sc->dc_pmode == DC_PMODE_MII &&
+ ((txstat & 0xFFFF) & ~(DC_TXSTAT_ERRSUM|
+ DC_TXSTAT_NOCARRIER|DC_TXSTAT_CARRLOST)))
+ txstat &= ~DC_TXSTAT_ERRSUM;
+
+ if (txstat & DC_TXSTAT_ERRSUM) {
+ ifp->if_oerrors++;
+ if (txstat & DC_TXSTAT_EXCESSCOLL)
+ ifp->if_collisions++;
+ if (txstat & DC_TXSTAT_LATECOLL)
+ ifp->if_collisions++;
+ if (!(txstat & DC_TXSTAT_UNDERRUN)) {
+ dc_init(sc);
+ return;
+ }
+ }
+
+ ifp->if_collisions += (txstat & DC_TXSTAT_COLLCNT) >> 3;
+
+ ifp->if_opackets++;
+ if (sc->dc_cdata.dc_tx_chain[idx] != NULL) {
+ m_freem(sc->dc_cdata.dc_tx_chain[idx]);
+ sc->dc_cdata.dc_tx_chain[idx] = NULL;
+ }
+
+ sc->dc_cdata.dc_tx_cnt--;
+ DC_INC(idx, DC_TX_LIST_CNT);
+ }
+
+ sc->dc_cdata.dc_tx_cons = idx;
+ if (cur_tx != NULL)
+ ifp->if_flags &= ~IFF_OACTIVE;
+
+ return;
+}
+
+void dc_tick(xsc)
+ void *xsc;
+{
+ struct dc_softc *sc = (struct dc_softc *)xsc;
+ struct mii_data *mii;
+ struct ifnet *ifp;
+ int s;
+ u_int32_t r;
+
+ s = splimp();
+
+ ifp = &sc->arpcom.ac_if;
+ mii = &sc->sc_mii;
+
+ if (sc->dc_flags & DC_REDUCED_MII_POLL) {
+ r = CSR_READ_4(sc, DC_ISR);
+ if (DC_IS_INTEL(sc)) {
+ if (r & DC_ISR_LINKFAIL)
+ sc->dc_link = 0;
+ if (sc->dc_link == 0)
+ mii_tick(mii);
+ } else {
+ if ((r & DC_ISR_RX_STATE) == DC_RXSTATE_WAIT &&
+ sc->dc_cdata.dc_tx_prod == 0)
+ mii_tick(mii);
+ }
+ } else
+ mii_tick(mii);
+
+ /*
+ * When the init routine completes, we expect to be able to send
+ * packets right away, and in fact the network code will send a
+ * gratuitous ARP the moment the init routine marks the interface
+ * as running. However, even though the MAC may have been initialized,
+ * there may be a delay of a few seconds before the PHY completes
+ * autonegotiation and the link is brought up. Any transmissions
+ * made during that delay will be lost. Dealing with this is tricky:
+ * we can't just pause in the init routine while waiting for the
+ * PHY to come ready since that would bring the whole system to
+ * a screeching halt for several seconds.
+ *
+ * What we do here is prevent the TX start routine from sending
+ * any packets until a link has been established. After the
+ * interface has been initialized, the tick routine will poll
+ * the state of the PHY until the IFM_ACTIVE flag is set. Until
+ * that time, packets will stay in the send queue, and once the
+ * link comes up, they will be flushed out to the wire.
+ */
+ if (!sc->dc_link) {
+ mii_pollstat(mii);
+ if (mii->mii_media_status & IFM_ACTIVE &&
+ IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
+ sc->dc_link++;
+ if (ifp->if_snd.ifq_head != NULL)
+ dc_start(ifp);
+ }
+ }
+
+ timeout(dc_tick, sc, hz);
+
+ splx(s);
+
+ return;
+}
+
+int dc_intr(arg)
+ void *arg;
+{
+ struct dc_softc *sc;
+ struct ifnet *ifp;
+ u_int32_t status;
+ int claimed = 0;
+
+ sc = arg;
+ ifp = &sc->arpcom.ac_if;
+
+ /* Supress unwanted interrupts */
+ if (!(ifp->if_flags & IFF_UP)) {
+ if (CSR_READ_4(sc, DC_ISR) & DC_INTRS)
+ dc_stop(sc);
+ return claimed;
+ }
+
+ claimed = 1;
+
+ /* Disable interrupts. */
+ CSR_WRITE_4(sc, DC_IMR, 0x00000000);
+
+ while((status = CSR_READ_4(sc, DC_ISR)) & DC_INTRS) {
+
+ CSR_WRITE_4(sc, DC_ISR, status);
+
+ if (status & DC_ISR_RX_OK)
+ dc_rxeof(sc);
+
+ if (status & (DC_ISR_TX_OK|DC_ISR_TX_NOBUF))
+ dc_txeof(sc);
+
+ if (status & DC_ISR_TX_IDLE) {
+ dc_txeof(sc);
+ if (sc->dc_cdata.dc_tx_cnt) {
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_TX_ON);
+ CSR_WRITE_4(sc, DC_TXSTART, 0xFFFFFFFF);
+ }
+ }
+
+ if (status & DC_ISR_TX_UNDERRUN) {
+ u_int32_t cfg;
+
+ printf("dc%d: TX underrun -- ", sc->dc_unit);
+ if (DC_IS_DAVICOM(sc) || DC_IS_INTEL(sc))
+ dc_init(sc);
+ cfg = CSR_READ_4(sc, DC_NETCFG);
+ cfg &= ~DC_NETCFG_TX_THRESH;
+ if (sc->dc_txthresh == DC_TXTHRESH_160BYTES) {
+ printf("using store and forward mode\n");
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_STORENFWD);
+ } else {
+ sc->dc_txthresh += 0x4000;
+ printf("increasing TX threshold\n");
+ CSR_WRITE_4(sc, DC_NETCFG, cfg);
+ DC_SETBIT(sc, DC_NETCFG, sc->dc_txthresh);
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_STORENFWD);
+ }
+ }
+
+ if ((status & DC_ISR_RX_WATDOGTIMEO)
+ || (status & DC_ISR_RX_NOBUF))
+ dc_rxeof(sc);
+
+ if (status & DC_ISR_BUS_ERR) {
+ dc_reset(sc);
+ dc_init(sc);
+ }
+ }
+
+ /* Re-enable interrupts. */
+ CSR_WRITE_4(sc, DC_IMR, DC_INTRS);
+
+ if (ifp->if_snd.ifq_head != NULL)
+ dc_start(ifp);
+
+ return claimed;
+}
+
+/*
+ * Encapsulate an mbuf chain in a descriptor by coupling the mbuf data
+ * pointers to the fragment pointers.
+ */
+int dc_encap(sc, m_head, txidx)
+ struct dc_softc *sc;
+ struct mbuf *m_head;
+ u_int32_t *txidx;
+{
+ struct dc_desc *f = NULL;
+ struct mbuf *m;
+ int frag, cur, cnt = 0;
+
+ /*
+ * 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;
+ cur = frag = *txidx;
+
+ for (m = m_head; m != NULL; m = m->m_next) {
+ if (m->m_len != 0) {
+ if (sc->dc_flags & DC_TX_ADMTEK_WAR) {
+ if (*txidx != sc->dc_cdata.dc_tx_prod &&
+ frag == (DC_TX_LIST_CNT - 1))
+ return(ENOBUFS);
+ }
+ if ((DC_TX_LIST_CNT -
+ (sc->dc_cdata.dc_tx_cnt + cnt)) < 5)
+ return(ENOBUFS);
+
+ f = &sc->dc_ldata->dc_tx_list[frag];
+ f->dc_ctl = DC_TXCTL_TLINK | m->m_len;
+ if (cnt == 0) {
+ f->dc_status = 0;
+ f->dc_ctl |= DC_TXCTL_FIRSTFRAG;
+ } else
+ f->dc_status = DC_TXSTAT_OWN;
+ f->dc_data = vtophys(mtod(m, vm_offset_t));
+ cur = frag;
+ DC_INC(frag, DC_TX_LIST_CNT);
+ cnt++;
+ }
+ }
+
+ if (m != NULL)
+ return(ENOBUFS);
+
+ sc->dc_cdata.dc_tx_cnt += cnt;
+ sc->dc_cdata.dc_tx_chain[cur] = m_head;
+ sc->dc_ldata->dc_tx_list[cur].dc_ctl |= DC_TXCTL_LASTFRAG;
+ if (sc->dc_flags & DC_TX_INTR_FIRSTFRAG)
+ sc->dc_ldata->dc_tx_list[*txidx].dc_ctl |= DC_TXCTL_FINT;
+ if (sc->dc_flags & DC_TX_USE_TX_INTR && sc->dc_cdata.dc_tx_cnt > 64)
+ sc->dc_ldata->dc_tx_list[cur].dc_ctl |= DC_TXCTL_FINT;
+ sc->dc_ldata->dc_tx_list[*txidx].dc_status = DC_TXSTAT_OWN;
+ *txidx = frag;
+
+ 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.
+ */
+
+void dc_start(ifp)
+ struct ifnet *ifp;
+{
+ struct dc_softc *sc;
+ struct mbuf *m_head = NULL;
+ int idx;
+
+ sc = ifp->if_softc;
+
+ if (!sc->dc_link)
+ return;
+
+ if (ifp->if_flags & IFF_OACTIVE)
+ return;
+
+ idx = sc->dc_cdata.dc_tx_prod;
+
+ while(sc->dc_cdata.dc_tx_chain[idx] == NULL) {
+ IF_DEQUEUE(&ifp->if_snd, m_head);
+ if (m_head == NULL)
+ break;
+
+ if (dc_encap(sc, m_head, &idx)) {
+ IF_PREPEND(&ifp->if_snd, m_head);
+ ifp->if_flags |= IFF_OACTIVE;
+ break;
+ }
+
+ /*
+ * If there's a BPF listener, bounce a copy of this frame
+ * to him.
+ */
+#if NBPFILTER > 0
+ if (ifp->if_bpf)
+ bpf_mtap(ifp->if_bpf, m_head);
+#endif
+ }
+
+ /* Transmit */
+ sc->dc_cdata.dc_tx_prod = idx;
+ if (!(sc->dc_flags & DC_TX_POLL))
+ CSR_WRITE_4(sc, DC_TXSTART, 0xFFFFFFFF);
+
+ /*
+ * Set a timeout in case the chip goes out to lunch.
+ */
+ ifp->if_timer = 5;
+
+ return;
+}
+
+void dc_init(xsc)
+ void *xsc;
+{
+ struct dc_softc *sc = xsc;
+ struct ifnet *ifp = &sc->arpcom.ac_if;
+ struct mii_data *mii;
+ int s;
+
+ s = splimp();
+
+ mii = &sc->sc_mii;
+
+ /*
+ * Cancel pending I/O and free all RX/TX buffers.
+ */
+ dc_stop(sc);
+ dc_reset(sc);
+
+ /*
+ * Set cache alignment and burst length.
+ */
+ if (DC_IS_ASIX(sc))
+ CSR_WRITE_4(sc, DC_BUSCTL, 0);
+ else
+ CSR_WRITE_4(sc, DC_BUSCTL, DC_BUSCTL_MRME|DC_BUSCTL_MRLE);
+ if (DC_IS_DAVICOM(sc) || DC_IS_INTEL(sc)) {
+ DC_SETBIT(sc, DC_BUSCTL, DC_BURSTLEN_USECA);
+ } else {
+ DC_SETBIT(sc, DC_BUSCTL, DC_BURSTLEN_16LONG);
+ }
+ if (sc->dc_flags & DC_TX_POLL)
+ DC_SETBIT(sc, DC_BUSCTL, DC_TXPOLL_1);
+ switch(sc->dc_cachesize) {
+ case 32:
+ DC_SETBIT(sc, DC_BUSCTL, DC_CACHEALIGN_32LONG);
+ break;
+ case 16:
+ DC_SETBIT(sc, DC_BUSCTL, DC_CACHEALIGN_16LONG);
+ break;
+ case 8:
+ DC_SETBIT(sc, DC_BUSCTL, DC_CACHEALIGN_8LONG);
+ break;
+ case 0:
+ default:
+ DC_SETBIT(sc, DC_BUSCTL, DC_CACHEALIGN_NONE);
+ break;
+ }
+
+ if (sc->dc_flags & DC_TX_STORENFWD)
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_STORENFWD);
+ else {
+ if (sc->dc_txthresh == DC_TXTHRESH_160BYTES) {
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_STORENFWD);
+ } else {
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_STORENFWD);
+ DC_SETBIT(sc, DC_NETCFG, sc->dc_txthresh);
+ }
+ }
+
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_NO_RXCRC);
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_TX_BACKOFF);
+
+ if (DC_IS_MACRONIX(sc) || DC_IS_PNICII(sc)) {
+ /*
+ * The app notes for the 98713 and 98715A say that
+ * in order to have the chips operate properly, a magic
+ * number must be written to CSR16. Macronix does not
+ * document the meaning of these bits so there's no way
+ * to know exactly what they do. The 98713 has a magic
+ * number all its own; the rest all use a different one.
+ */
+ DC_CLRBIT(sc, DC_MX_MAGICPACKET, 0xFFFF0000);
+ if (sc->dc_type == DC_TYPE_98713)
+ DC_SETBIT(sc, DC_MX_MAGICPACKET, DC_MX_MAGIC_98713);
+ else
+ DC_SETBIT(sc, DC_MX_MAGICPACKET, DC_MX_MAGIC_98715);
+ }
+
+ DC_CLRBIT(sc, DC_NETCFG, DC_NETCFG_TX_THRESH);
+ DC_SETBIT(sc, DC_NETCFG, DC_TXTHRESH_72BYTES);
+
+ /* Init circular RX list. */
+ if (dc_list_rx_init(sc) == ENOBUFS) {
+ printf("dc%d: initialization failed: no "
+ "memory for rx buffers\n", sc->dc_unit);
+ dc_stop(sc);
+ (void)splx(s);
+ return;
+ }
+
+ /*
+ * Init tx descriptors.
+ */
+ dc_list_tx_init(sc);
+
+ /*
+ * Load the address of the RX list.
+ */
+ CSR_WRITE_4(sc, DC_RXADDR, vtophys(&sc->dc_ldata->dc_rx_list[0]));
+ CSR_WRITE_4(sc, DC_TXADDR, vtophys(&sc->dc_ldata->dc_tx_list[0]));
+
+ /*
+ * Enable interrupts.
+ */
+ CSR_WRITE_4(sc, DC_IMR, DC_INTRS);
+ CSR_WRITE_4(sc, DC_ISR, 0xFFFFFFFF);
+
+ /* Enable transmitter. */
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_TX_ON);
+
+ /*
+ * Load the RX/multicast filter. We do this sort of late
+ * because the filter programming scheme on the 21143 and
+ * some clones requires DMAing a setup frame via the TX
+ * engine, and we need the transmitter enabled for that.
+ */
+ dc_setfilt(sc);
+
+ /* Enable receiver. */
+ DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_ON);
+ CSR_WRITE_4(sc, DC_RXSTART, 0xFFFFFFFF);
+
+ mii_mediachg(mii);
+ dc_setcfg(sc, sc->dc_if_media);
+
+ ifp->if_flags |= IFF_RUNNING;
+ ifp->if_flags &= ~IFF_OACTIVE;
+
+ (void)splx(s);
+
+ timeout(dc_tick, sc, hz);
+
+ return;
+}
+
+/*
+ * Set media options.
+ */
+int dc_ifmedia_upd(ifp)
+ struct ifnet *ifp;
+{
+ struct dc_softc *sc;
+ struct mii_data *mii;
+
+ sc = ifp->if_softc;
+ mii = &sc->sc_mii;
+ mii_mediachg(mii);
+ sc->dc_link = 0;
+
+ return(0);
+}
+
+/*
+ * Report current media status.
+ */
+void dc_ifmedia_sts(ifp, ifmr)
+ struct ifnet *ifp;
+ struct ifmediareq *ifmr;
+{
+ struct dc_softc *sc;
+ struct mii_data *mii;
+
+ sc = ifp->if_softc;
+ mii = &sc->sc_mii;
+ mii_pollstat(mii);
+ ifmr->ifm_active = mii->mii_media_active;
+ ifmr->ifm_status = mii->mii_media_status;
+
+ return;
+}
+
+int dc_ioctl(ifp, command, data)
+ struct ifnet *ifp;
+ u_long command;
+ caddr_t data;
+{
+ struct dc_softc *sc = ifp->if_softc;
+ struct ifreq *ifr = (struct ifreq *) data;
+ struct ifaddr *ifa = (struct ifaddr *)data;
+ struct mii_data *mii;
+ int s, error = 0;
+
+ s = splimp();
+
+ if ((error = ether_ioctl(ifp, &sc->arpcom, command, data)) > 0) {
+ splx(s);
+ return error;
+ }
+
+ switch(command) {
+ case SIOCSIFADDR:
+ ifp->if_flags |= IFF_UP;
+ switch (ifa->ifa_addr->sa_family) {
+ case AF_INET:
+ dc_init(sc);
+ arp_ifinit(&sc->arpcom, ifa);
+ break;
+ default:
+ dc_init(sc);
+ break;
+ }
+ break;
+ case SIOCSIFFLAGS:
+ if (ifp->if_flags & IFF_UP) {
+ if (ifp->if_flags & IFF_RUNNING &&
+ ifp->if_flags & IFF_PROMISC &&
+ !(sc->dc_if_flags & IFF_PROMISC)) {
+ dc_setfilt(sc);
+ } else if (ifp->if_flags & IFF_RUNNING &&
+ !(ifp->if_flags & IFF_PROMISC) &&
+ sc->dc_if_flags & IFF_PROMISC) {
+ dc_setfilt(sc);
+ } else if (!(ifp->if_flags & IFF_RUNNING)) {
+ sc->dc_txthresh = 0;
+ dc_init(sc);
+ }
+ } else {
+ if (ifp->if_flags & IFF_RUNNING)
+ dc_stop(sc);
+ }
+ sc->dc_if_flags = ifp->if_flags;
+ error = 0;
+ break;
+ case SIOCADDMULTI:
+ case SIOCDELMULTI:
+ dc_setfilt(sc);
+ error = 0;
+ break;
+ case SIOCGIFMEDIA:
+ case SIOCSIFMEDIA:
+ mii = &sc->sc_mii;
+ error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
+ break;
+ default:
+ error = EINVAL;
+ break;
+ }
+
+ (void)splx(s);
+
+ return(error);
+}
+
+void dc_watchdog(ifp)
+ struct ifnet *ifp;
+{
+ struct dc_softc *sc;
+
+ sc = ifp->if_softc;
+
+ ifp->if_oerrors++;
+ printf("dc%d: watchdog timeout\n", sc->dc_unit);
+
+ dc_stop(sc);
+ dc_reset(sc);
+ dc_init(sc);
+
+ if (ifp->if_snd.ifq_head != NULL)
+ dc_start(ifp);
+
+ return;
+}
+
+/*
+ * Stop the adapter and free any mbufs allocated to the
+ * RX and TX lists.
+ */
+void dc_stop(sc)
+ struct dc_softc *sc;
+{
+ register int i;
+ struct ifnet *ifp;
+
+ ifp = &sc->arpcom.ac_if;
+ ifp->if_timer = 0;
+
+ untimeout(dc_tick, sc);
+
+ DC_CLRBIT(sc, DC_NETCFG, (DC_NETCFG_RX_ON|DC_NETCFG_TX_ON));
+ CSR_WRITE_4(sc, DC_IMR, 0x00000000);
+ CSR_WRITE_4(sc, DC_TXADDR, 0x00000000);
+ CSR_WRITE_4(sc, DC_RXADDR, 0x00000000);
+ sc->dc_link = 0;
+
+ /*
+ * Free data in the RX lists.
+ */
+ for (i = 0; i < DC_RX_LIST_CNT; i++) {
+ if (sc->dc_cdata.dc_rx_chain[i] != NULL) {
+ m_freem(sc->dc_cdata.dc_rx_chain[i]);
+ sc->dc_cdata.dc_rx_chain[i] = NULL;
+ }
+ }
+ bzero((char *)&sc->dc_ldata->dc_rx_list,
+ sizeof(sc->dc_ldata->dc_rx_list));
+
+ /*
+ * Free the TX list buffers.
+ */
+ for (i = 0; i < DC_TX_LIST_CNT; i++) {
+ if (sc->dc_cdata.dc_tx_chain[i] != NULL) {
+ if (sc->dc_ldata->dc_tx_list[i].dc_ctl &
+ DC_TXCTL_SETUP) {
+ sc->dc_cdata.dc_tx_chain[i] = NULL;
+ continue;
+ }
+ m_freem(sc->dc_cdata.dc_tx_chain[i]);
+ sc->dc_cdata.dc_tx_chain[i] = NULL;
+ }
+ }
+
+ bzero((char *)&sc->dc_ldata->dc_tx_list,
+ sizeof(sc->dc_ldata->dc_tx_list));
+
+ ifp->if_flags &= ~(IFF_RUNNING | IFF_OACTIVE);
+
+ return;
+}
+
+/*
+ * Stop all chip I/O so that the kernel's probe routines don't
+ * get confused by errant DMAs when rebooting.
+ */
+void dc_shutdown(v)
+ void *v;
+{
+ struct dc_softc *sc = (struct dc_softc *)v;
+
+ dc_stop(sc);
+}
+
+struct cfattach dc_ca = {
+ sizeof(struct dc_softc), dc_probe, dc_attach
+};
+
+struct cfdriver dc_cd = {
+ 0, "dc", DV_IFNET
+};
+