2 * Copyright (c) 1996 Gardner Buchanan <gbuchanan@shl.com>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Gardner Buchanan.
16 * 4. The name of Gardner Buchanan may not be used to endorse or promote
17 * products derived from this software without specific prior written
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 * $FreeBSD: src/sys/dev/sn/if_sn.c,v 1.7.2.3 2001/02/04 04:38:38 toshi Exp $
32 * $DragonFly: src/sys/dev/netif/sn/if_sn.c,v 1.5 2003/11/20 22:07:31 dillon Exp $
36 * This is a driver for SMC's 9000 series of Ethernet adapters.
38 * This FreeBSD driver is derived from the smc9194 Linux driver by
39 * Erik Stahlman and is Copyright (C) 1996 by Erik Stahlman.
40 * This driver also shamelessly borrows from the FreeBSD ep driver
41 * which is Copyright (C) 1994 Herb Peyerl <hpeyerl@novatel.ca>
42 * All rights reserved.
44 * It is set up for my SMC91C92 equipped Ampro LittleBoard embedded
45 * PC. It is adapted from Erik Stahlman's Linux driver which worked
46 * with his EFA Info*Express SVC VLB adaptor. According to SMC's databook,
47 * it will work for the entire SMC 9xxx series. (Ha Ha)
49 * "Features" of the SMC chip:
50 * 4608 byte packet memory. (for the 91C92. Others have more)
51 * EEPROM for configuration
55 * Erik Stahlman erik@vt.edu
56 * Herb Peyerl hpeyerl@novatel.ca
57 * Andres Vega Garcia avega@sophia.inria.fr
58 * Serge Babkin babkin@hq.icb.chel.su
59 * Gardner Buchanan gbuchanan@shl.com
63 * o "smc9194.c:v0.10(FIXED) 02/15/96 by Erik Stahlman (erik@vt.edu)"
64 * o "if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp"
67 * o The hardware multicast filter isn't used yet.
68 * o Setting of the hardware address isn't supported.
69 * o Hardware padding isn't used.
73 * Modifications for Megahertz X-Jack Ethernet Card (XJ-10BT)
75 * Copyright (c) 1996 by Tatsumi Hosokawa <hosokawa@jp.FreeBSD.org>
76 * BSD-nomads, Tokyo, Japan.
79 * Multicast support by Kei TANAKA <kei@pal.xerox.com>
80 * Special thanks to itojun@itojun.org
83 #undef SN_DEBUG /* (by hosokawa) */
85 #include <sys/param.h>
86 #include <sys/systm.h>
87 #include <sys/kernel.h>
88 #include <sys/errno.h>
89 #include <sys/sockio.h>
90 #include <sys/malloc.h>
92 #include <sys/socket.h>
93 #include <sys/syslog.h>
95 #include <sys/module.h>
98 #include <machine/bus.h>
99 #include <machine/resource.h>
100 #include <sys/rman.h>
102 #include <net/ethernet.h>
104 #include <net/if_arp.h>
105 #include <net/if_dl.h>
106 #include <net/if_types.h>
107 #include <net/if_mib.h>
110 #include <netinet/in.h>
111 #include <netinet/in_systm.h>
112 #include <netinet/in_var.h>
113 #include <netinet/ip.h>
117 #include <netns/ns.h>
118 #include <netns/ns_if.h>
122 #include <net/bpfdesc.h>
124 #include <machine/clock.h>
126 #include "if_snreg.h"
127 #include "if_snvar.h"
129 /* Exported variables */
130 devclass_t sn_devclass;
132 static int snioctl(struct ifnet * ifp, u_long, caddr_t);
134 static void snresume(struct ifnet *);
137 void snread(struct ifnet *);
138 void snreset(struct sn_softc *);
139 void snstart(struct ifnet *);
140 void snstop(struct sn_softc *);
141 void snwatchdog(struct ifnet *);
143 static void sn_setmcast(struct sn_softc *);
144 static int sn_getmcf(struct arpcom *ac, u_char *mcf);
145 static u_int smc_crc(u_char *);
147 DECLARE_DUMMY_MODULE(if_sn);
149 /* I (GB) have been unlucky getting the hardware padding
154 static const char *chip_ids[15] = {
156 /* 3 */ "SMC91C90/91C92",
161 /* 8 */ "SMC91C100FD",
167 sn_attach(device_t dev)
169 struct sn_softc *sc = device_get_softc(dev);
170 struct ifnet *ifp = &sc->arpcom.ac_if;
174 struct sockaddr_dl *sdl;
184 sc->pages_wanted = -1;
186 device_printf(dev, " ");
189 rev = inw(BASE + REVISION_REG_W);
190 if (chip_ids[(rev >> 4) & 0xF])
191 printf("%s ", chip_ids[(rev >> 4) & 0xF]);
194 i = inw(BASE + CONFIG_REG_W);
195 printf(i & CR_AUI_SELECT ? "AUI" : "UTP");
197 if (sc->pccard_enaddr)
198 for (j = 0; j < 3; j++) {
201 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
202 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
203 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
207 * Read the station address from the chip. The MAC address is bank 1,
211 p = (u_char *) & sc->arpcom.ac_enaddr;
212 for (i = 0; i < 6; i += 2) {
213 address = inw(BASE + IAR_ADDR0_REG_W + i);
214 p[i + 1] = address >> 8;
215 p[i] = address & 0xFF;
217 printf(" MAC address %6D\n", sc->arpcom.ac_enaddr, ":");
219 ifp->if_unit = device_get_unit(dev);
221 ifp->if_mtu = ETHERMTU;
222 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
223 ifp->if_output = ether_output;
224 ifp->if_start = snstart;
225 ifp->if_ioctl = snioctl;
226 ifp->if_watchdog = snwatchdog;
227 ifp->if_init = sninit;
228 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
231 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
234 * Fill the hardware address into ifa_addr if we find an AF_LINK
235 * entry. We need to do this so bpf's can get the hardware addr of
236 * this card. netstat likes this too!
238 ifa = TAILQ_FIRST(&ifp->if_addrhead);
239 while ((ifa != 0) && (ifa->ifa_addr != 0) &&
240 (ifa->ifa_addr->sa_family != AF_LINK))
241 ifa = TAILQ_NEXT(ifa, ifa_link);
243 if ((ifa != 0) && (ifa->ifa_addr != 0)) {
244 sdl = (struct sockaddr_dl *) ifa->ifa_addr;
245 sdl->sdl_type = IFT_ETHER;
246 sdl->sdl_alen = ETHER_ADDR_LEN;
248 bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
256 * Reset and initialize the chip
261 struct sn_softc *sc = xsc;
262 struct ifnet *ifp = &sc->arpcom.ac_if;
270 * This resets the registers mostly to defaults, but doesn't affect
271 * EEPROM. After the reset cycle, we pause briefly for the chip to
275 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
277 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
281 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
284 * Set the control register to automatically release succesfully
285 * transmitted packets (making the best use out of our limited
286 * memory) and to enable the EPH interrupt on certain TX errors.
289 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
290 CTR_CR_ENABLE | CTR_LE_ENABLE));
292 /* Set squelch level to 240mV (default 480mV) */
293 flags = inw(BASE + CONFIG_REG_W);
294 flags |= CR_SET_SQLCH;
295 outw(BASE + CONFIG_REG_W, flags);
298 * Reset the MMU and wait for it to be un-busy.
301 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
302 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
306 * Disable all interrupts
308 outb(BASE + INTR_MASK_REG_B, 0x00);
313 * Set the transmitter control. We want it enabled.
319 * I (GB) have been unlucky getting this to work.
321 flags |= TCR_PAD_ENABLE;
324 outw(BASE + TXMIT_CONTROL_REG_W, flags);
328 * Now, enable interrupts
337 outb(BASE + INTR_MASK_REG_B, mask);
338 sc->intr_mask = mask;
339 sc->pages_wanted = -1;
343 * Mark the interface running but not active.
345 ifp->if_flags |= IFF_RUNNING;
346 ifp->if_flags &= ~IFF_OACTIVE;
349 * Attempt to push out any waiting packets.
358 snstart(struct ifnet *ifp)
360 struct sn_softc *sc = ifp->if_softc;
373 if (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) {
377 if (sc->pages_wanted != -1) {
379 printf("sn%d: snstart() while memory allocation pending\n",
386 * Sneak a peek at the next packet
388 m = sc->arpcom.ac_if.if_snd.ifq_head;
394 * Compute the frame length and set pad to give an overall even
395 * number of bytes. Below we assume that the packet length is even.
397 for (len = 0, top = m; m; m = m->m_next)
403 * We drop packets that are too large. Perhaps we should truncate
406 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
407 printf("sn%d: large packet discarded (A)\n", ifp->if_unit);
408 ++sc->arpcom.ac_if.if_oerrors;
409 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
416 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
418 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
419 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
426 * The MMU wants the number of pages to be the number of 256 byte
427 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
428 * include space for the status word, byte count and control bytes in
429 * the allocation request.
431 numPages = (length + 6) >> 8;
435 * Now, try to allocate the memory
438 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
441 * Wait a short amount of time to see if the allocation request
442 * completes. Otherwise, I enable the interrupt and wait for
443 * completion asyncronously.
446 time_out = MEMORY_WAIT_TIME;
448 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
450 } while (--time_out);
455 * No memory now. Oh well, wait until the chip finds memory
456 * later. Remember how many pages we were asking for and
457 * enable the allocation completion interrupt. Also set a
458 * watchdog in case we miss the interrupt. We mark the
459 * interface active since there is no point in attempting an
460 * snstart() until after the memory is available.
462 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
463 outb(BASE + INTR_MASK_REG_B, mask);
464 sc->intr_mask = mask;
466 sc->arpcom.ac_if.if_timer = 1;
467 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
468 sc->pages_wanted = numPages;
474 * The memory allocation completed. Check the results.
476 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
477 if (packet_no & ARR_FAILED) {
478 printf("sn%d: Memory allocation failed\n", ifp->if_unit);
482 * We have a packet number, so tell the card to use it.
484 outb(BASE + PACKET_NUM_REG_B, packet_no);
487 * Point to the beginning of the packet
489 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
492 * Send the packet length (+6 for status, length and control byte)
493 * and the status word (set to zeros)
495 outw(BASE + DATA_REG_W, 0);
496 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
497 outb(BASE + DATA_REG_B, (length + 6) >> 8);
500 * Get the packet from the kernel. This will include the Ethernet
501 * frame header, MAC Addresses etc.
503 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
506 * Push out the data to the card.
508 for (top = m; m != 0; m = m->m_next) {
513 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
516 * Push out remaining byte.
519 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
526 outw(BASE + DATA_REG_W, 0);
530 outb(BASE + DATA_REG_B, 0);
533 * Push out control byte and unused packet byte The control byte is 0
534 * meaning the packet is even lengthed and no special CRC handling is
537 outw(BASE + DATA_REG_W, 0);
540 * Enable the interrupts and let the chipset deal with it Also set a
541 * watchdog in case we miss the interrupt.
543 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
544 outb(BASE + INTR_MASK_REG_B, mask);
545 sc->intr_mask = mask;
547 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
549 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
550 sc->arpcom.ac_if.if_timer = 1;
556 sc->arpcom.ac_if.if_opackets++;
563 * Is another packet coming in? We don't want to overflow the tiny
564 * RX FIFO. If nothing has arrived then attempt to queue another
567 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
576 /* Resume a packet transmit operation after a memory allocation
579 * This is basically a hacked up copy of snstart() which handles
580 * a completed memory allocation the same way snstart() does.
581 * It then passes control to snstart to handle any other queued
585 snresume(struct ifnet *ifp)
587 struct sn_softc *sc = ifp->if_softc;
595 u_short pages_wanted;
598 if (sc->pages_wanted < 0)
601 pages_wanted = sc->pages_wanted;
602 sc->pages_wanted = -1;
605 * Sneak a peek at the next packet
607 m = sc->arpcom.ac_if.if_snd.ifq_head;
609 printf("sn%d: snresume() with nothing to send\n", ifp->if_unit);
613 * Compute the frame length and set pad to give an overall even
614 * number of bytes. Below we assume that the packet length is even.
616 for (len = 0, top = m; m; m = m->m_next)
622 * We drop packets that are too large. Perhaps we should truncate
625 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
626 printf("sn%d: large packet discarded (B)\n", ifp->if_unit);
627 ++sc->arpcom.ac_if.if_oerrors;
628 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
635 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
637 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
638 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
646 * The MMU wants the number of pages to be the number of 256 byte
647 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
648 * include space for the status word, byte count and control bytes in
649 * the allocation request.
651 numPages = (length + 6) >> 8;
657 * The memory allocation completed. Check the results. If it failed,
658 * we simply set a watchdog timer and hope for the best.
660 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
661 if (packet_no & ARR_FAILED) {
662 printf("sn%d: Memory allocation failed. Weird.\n", ifp->if_unit);
663 sc->arpcom.ac_if.if_timer = 1;
667 * We have a packet number, so tell the card to use it.
669 outb(BASE + PACKET_NUM_REG_B, packet_no);
672 * Now, numPages should match the pages_wanted recorded when the
673 * memory allocation was initiated.
675 if (pages_wanted != numPages) {
676 printf("sn%d: memory allocation wrong size. Weird.\n", ifp->if_unit);
678 * If the allocation was the wrong size we simply release the
679 * memory once it is granted. Wait for the MMU to be un-busy.
681 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
683 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
688 * Point to the beginning of the packet
690 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
693 * Send the packet length (+6 for status, length and control byte)
694 * and the status word (set to zeros)
696 outw(BASE + DATA_REG_W, 0);
697 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
698 outb(BASE + DATA_REG_B, (length + 6) >> 8);
701 * Get the packet from the kernel. This will include the Ethernet
702 * frame header, MAC Addresses etc.
704 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
707 * Push out the data to the card.
709 for (top = m; m != 0; m = m->m_next) {
714 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
717 * Push out remaining byte.
720 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
727 outw(BASE + DATA_REG_W, 0);
731 outb(BASE + DATA_REG_B, 0);
734 * Push out control byte and unused packet byte The control byte is 0
735 * meaning the packet is even lengthed and no special CRC handling is
738 outw(BASE + DATA_REG_W, 0);
741 * Enable the interrupts and let the chipset deal with it Also set a
742 * watchdog in case we miss the interrupt.
744 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
745 outb(BASE + INTR_MASK_REG_B, mask);
746 sc->intr_mask = mask;
747 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
753 sc->arpcom.ac_if.if_opackets++;
759 * Now pass control to snstart() to queue any additional packets
761 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
765 * We've sent something, so we're active. Set a watchdog in case the
766 * TX_EMPTY interrupt is lost.
768 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
769 sc->arpcom.ac_if.if_timer = 1;
778 int status, interrupts;
779 struct sn_softc *sc = (struct sn_softc *) arg;
780 struct ifnet *ifp = &sc->arpcom.ac_if;
784 * Chip state registers
792 * if_ep.c did this, so I do too. Yet if_ed.c doesn't. I wonder...
797 * Clear the watchdog.
804 * Obtain the current interrupt mask and clear the hardware mask
805 * while servicing interrupts.
807 mask = inb(BASE + INTR_MASK_REG_B);
808 outb(BASE + INTR_MASK_REG_B, 0x00);
811 * Get the set of interrupts which occurred and eliminate any which
814 interrupts = inb(BASE + INTR_STAT_REG_B);
815 status = interrupts & mask;
818 * Now, process each of the interrupt types.
824 if (status & IM_RX_OVRN_INT) {
827 * Acknowlege Interrupt
830 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
832 ++sc->arpcom.ac_if.if_ierrors;
837 if (status & IM_RCV_INT) {
842 packet_number = inw(BASE + FIFO_PORTS_REG_W);
844 if (packet_number & FIFO_REMPTY) {
847 * we got called , but nothing was on the FIFO
849 printf("sn: Receive interrupt with nothing on FIFO\n");
857 * An on-card memory allocation came through.
859 if (status & IM_ALLOC_INT) {
862 * Disable this interrupt.
864 mask &= ~IM_ALLOC_INT;
865 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
866 snresume(&sc->arpcom.ac_if);
869 * TX Completion. Handle a transmit error message. This will only be
870 * called when there is an error, because of the AUTO_RELEASE mode.
872 if (status & IM_TX_INT) {
875 * Acknowlege Interrupt
878 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
880 packet_no = inw(BASE + FIFO_PORTS_REG_W);
881 packet_no &= FIFO_TX_MASK;
884 * select this as the packet to read from
886 outb(BASE + PACKET_NUM_REG_B, packet_no);
889 * Position the pointer to the first word from this packet
891 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
894 * Fetch the TX status word. The value found here will be a
895 * copy of the EPH_STATUS_REG_W at the time the transmit
898 tx_status = inw(BASE + DATA_REG_W);
900 if (tx_status & EPHSR_TX_SUC) {
901 device_printf(sc->dev,
902 "Successful packet caused interrupt\n");
904 ++sc->arpcom.ac_if.if_oerrors;
907 if (tx_status & EPHSR_LATCOL)
908 ++sc->arpcom.ac_if.if_collisions;
911 * Some of these errors will have disabled transmit.
912 * Re-enable transmit now.
917 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
919 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
923 * kill the failed packet. Wait for the MMU to be un-busy.
926 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
928 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
931 * Attempt to queue more transmits.
933 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
934 snstart(&sc->arpcom.ac_if);
937 * Transmit underrun. We use this opportunity to update transmit
938 * statistics from the card.
940 if (status & IM_TX_EMPTY_INT) {
943 * Acknowlege Interrupt
946 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
949 * Disable this interrupt.
951 mask &= ~IM_TX_EMPTY_INT;
954 card_stats = inw(BASE + COUNTER_REG_W);
959 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
962 * Multiple collisions
964 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
969 * Attempt to enqueue some more stuff.
971 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
972 snstart(&sc->arpcom.ac_if);
975 * Some other error. Try to fix it by resetting the adapter.
977 if (status & IM_EPH_INT) {
984 * Handled all interrupt sources.
990 * Reestablish interrupts from mask which have not been deselected
991 * during this interrupt. Note that the hardware mask, which was set
992 * to 0x00 at the start of this service routine, may have been
993 * updated by one or more of the interrupt handers and we must let
994 * those new interrupts stay enabled here.
996 mask |= inb(BASE + INTR_MASK_REG_B);
997 outb(BASE + INTR_MASK_REG_B, mask);
998 sc->intr_mask = mask;
1004 snread(struct ifnet *ifp)
1006 struct sn_softc *sc = ifp->if_softc;
1007 struct ether_header *eh;
1011 u_short packet_length;
1016 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1018 if (packet_number & FIFO_REMPTY) {
1021 * we got called , but nothing was on the FIFO
1023 printf("sn: Receive interrupt with nothing on FIFO\n");
1030 * Start reading from the start of the packet. Since PTR_RCV is set,
1031 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
1033 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
1036 * First two words are status and packet_length
1038 status = inw(BASE + DATA_REG_W);
1039 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
1042 * The packet length contains 3 extra words: status, length, and a
1043 * extra word with the control byte.
1048 * Account for receive errors and discard.
1050 if (status & RS_ERRORS) {
1051 ++sc->arpcom.ac_if.if_ierrors;
1055 * A packet is received.
1059 * Adjust for odd-length packet.
1061 if (status & RS_ODDFRAME)
1065 * Allocate a header mbuf from the kernel.
1067 MGETHDR(m, M_DONTWAIT, MT_DATA);
1071 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1072 m->m_pkthdr.len = m->m_len = packet_length;
1075 * Attach an mbuf cluster
1077 MCLGET(m, M_DONTWAIT);
1080 * Insist on getting a cluster
1082 if ((m->m_flags & M_EXT) == 0) {
1084 ++sc->arpcom.ac_if.if_ierrors;
1085 printf("sn: snread() kernel memory allocation problem\n");
1088 eh = mtod(m, struct ether_header *);
1091 * Get packet, including link layer address, from interface.
1094 data = (u_char *) eh;
1095 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1096 if (packet_length & 1) {
1097 data += packet_length & ~1;
1098 *data = inb(BASE + DATA_REG_B);
1100 ++sc->arpcom.ac_if.if_ipackets;
1103 * Remove link layer addresses and whatnot.
1105 m->m_pkthdr.len = m->m_len = packet_length - sizeof(struct ether_header);
1106 m->m_data += sizeof(struct ether_header);
1108 ether_input(&sc->arpcom.ac_if, eh, m);
1113 * Error or good, tell the card to get rid of this packet Wait for
1114 * the MMU to be un-busy.
1117 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1119 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1122 * Check whether another packet is ready
1124 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1125 if (packet_number & FIFO_REMPTY) {
1133 * Handle IOCTLS. This function is completely stolen from if_ep.c
1134 * As with its progenitor, it does not handle hardware address
1138 snioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1140 struct sn_softc *sc = ifp->if_softc;
1149 error = ether_ioctl(ifp, cmd, data);
1153 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1154 ifp->if_flags &= ~IFF_RUNNING;
1158 /* reinitialize card on any parameter change */
1166 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1167 sizeof(sc->sc_addr));
1172 /* update multicast filter list. */
1177 /* update multicast filter list. */
1191 snreset(struct sn_softc *sc)
1203 snwatchdog(struct ifnet *ifp)
1207 sn_intr(ifp->if_softc);
1212 /* 1. zero the interrupt mask
1213 * 2. clear the enable receive flag
1214 * 3. clear the enable xmit flags
1217 snstop(struct sn_softc *sc)
1220 struct ifnet *ifp = &sc->arpcom.ac_if;
1223 * Clear interrupt mask; disable all interrupts.
1226 outb(BASE + INTR_MASK_REG_B, 0x00);
1229 * Disable transmitter and Receiver
1232 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1233 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1243 sn_activate(device_t dev)
1245 struct sn_softc *sc = device_get_softc(dev);
1249 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1250 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1251 if (!sc->port_res) {
1253 device_printf(dev, "Cannot allocate ioport\n");
1259 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid,
1260 0, ~0, 1, RF_ACTIVE);
1263 device_printf(dev, "Cannot allocate irq\n");
1268 if ((err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, sn_intr, sc,
1269 &sc->intrhand)) != 0) {
1274 sc->sn_io_addr = rman_get_start(sc->port_res);
1279 sn_deactivate(device_t dev)
1281 struct sn_softc *sc = device_get_softc(dev);
1284 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
1287 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1291 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1298 * Function: sn_probe( device_t dev, int pccard )
1301 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1302 * Tries to cause as little damage as possible if it's not a SMC chip.
1303 * Returns a 0 on success
1306 * (1) see if the high byte of BANK_SELECT is 0x33
1307 * (2) compare the ioaddr with the base register's address
1308 * (3) see if I recognize the chip ID in the appropriate register
1313 sn_probe(device_t dev, int pccard)
1315 struct sn_softc *sc = device_get_softc(dev);
1317 u_short revision_register;
1318 u_short base_address_register;
1322 if ((err = sn_activate(dev)) != 0)
1325 ioaddr = sc->sn_io_addr;
1328 * First, see if the high byte is 0x33
1330 bank = inw(ioaddr + BANK_SELECT_REG_W);
1331 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1333 device_printf(dev, "test1 failed\n");
1338 * The above MIGHT indicate a device, but I need to write to further
1339 * test this. Go to bank 0, then test that the register still
1340 * reports the high byte is 0x33.
1342 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1343 bank = inw(ioaddr + BANK_SELECT_REG_W);
1344 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1346 device_printf(dev, "test2 failed\n");
1351 * well, we've already written once, so hopefully another time won't
1352 * hurt. This time, I need to switch the bank register to bank 1, so
1353 * I can access the base address register. The contents of the
1354 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1355 * to match the I/O port address where the adapter is being probed.
1357 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1358 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1361 * This test is nonsence on PC-card architecture, so if
1362 * pccard == 1, skip this test. (hosokawa)
1364 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1367 * Well, the base address register didn't match. Must not
1368 * have been a SMC chip after all.
1371 * printf("sn: ioaddr %x doesn't match card configuration
1372 * (%x)\n", ioaddr, base_address_register >> 3 & 0x3E0 );
1376 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1377 "base_address_register = 0x%x\n", ioaddr,
1378 base_address_register >> 3 & 0x3E0);
1383 * Check if the revision register is something that I recognize.
1384 * These might need to be added to later, as future revisions could
1387 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1388 revision_register = inw(ioaddr + REVISION_REG_W);
1389 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1392 * I don't regonize this chip, so...
1395 device_printf(dev, "test4 failed\n");
1400 * at this point I'll assume that the chip is an SMC9xxx. It might be
1401 * prudent to check a listing of MAC addresses against the hardware
1402 * address, or do some other tests.
1414 sn_setmcast(struct sn_softc *sc)
1416 struct ifnet *ifp = (struct ifnet *)sc;
1420 * Set the receiver filter. We want receive enabled and auto strip
1421 * of CRC from received packet. If we are promiscuous then set that
1424 flags = RCR_ENABLE | RCR_STRIP_CRC;
1426 if (ifp->if_flags & IFF_PROMISC) {
1427 flags |= RCR_PROMISC | RCR_ALMUL;
1428 } else if (ifp->if_flags & IFF_ALLMULTI) {
1432 if (sn_getmcf(&sc->arpcom, mcf)) {
1435 outw(BASE + MULTICAST1_REG_W,
1436 ((u_short)mcf[1] << 8) | mcf[0]);
1437 outw(BASE + MULTICAST2_REG_W,
1438 ((u_short)mcf[3] << 8) | mcf[2]);
1439 outw(BASE + MULTICAST3_REG_W,
1440 ((u_short)mcf[5] << 8) | mcf[4]);
1441 outw(BASE + MULTICAST4_REG_W,
1442 ((u_short)mcf[7] << 8) | mcf[6]);
1448 outw(BASE + RECV_CONTROL_REG_W, flags);
1452 sn_getmcf(struct arpcom *ac, u_char *mcf)
1455 u_int index, index2;
1456 u_char *af = (u_char *) mcf;
1457 struct ifmultiaddr *ifma;
1461 for (ifma = ac->ac_if.if_multiaddrs.lh_first; ifma;
1462 ifma = ifma->ifma_link.le_next) {
1463 if (ifma->ifma_addr->sa_family != AF_LINK)
1465 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1467 for (i = 0; i < 6; i++) {
1469 index2 |= (index & 0x01);
1472 af[index2 >> 3] |= 1 << (index2 & 7);
1474 return 1; /* use multicast filter */
1482 const u_int poly = 0xedb88320;
1483 u_int v = 0xffffffff;
1486 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1488 for (perBit = 0; perBit < 8; perBit++) {
1489 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);