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.
35 * This is a driver for SMC's 9000 series of Ethernet adapters.
37 * This FreeBSD driver is derived from the smc9194 Linux driver by
38 * Erik Stahlman and is Copyright (C) 1996 by Erik Stahlman.
39 * This driver also shamelessly borrows from the FreeBSD ep driver
40 * which is Copyright (C) 1994 Herb Peyerl <hpeyerl@novatel.ca>
41 * All rights reserved.
43 * It is set up for my SMC91C92 equipped Ampro LittleBoard embedded
44 * PC. It is adapted from Erik Stahlman's Linux driver which worked
45 * with his EFA Info*Express SVC VLB adaptor. According to SMC's databook,
46 * it will work for the entire SMC 9xxx series. (Ha Ha)
48 * "Features" of the SMC chip:
49 * 4608 byte packet memory. (for the 91C92. Others have more)
50 * EEPROM for configuration
54 * Erik Stahlman erik@vt.edu
55 * Herb Peyerl hpeyerl@novatel.ca
56 * Andres Vega Garcia avega@sophia.inria.fr
57 * Serge Babkin babkin@hq.icb.chel.su
58 * Gardner Buchanan gbuchanan@shl.com
62 * o "smc9194.c:v0.10(FIXED) 02/15/96 by Erik Stahlman (erik@vt.edu)"
63 * o "if_ep.c,v 1.19 1995/01/24 20:53:45 davidg Exp"
66 * o The hardware multicast filter isn't used yet.
67 * o Setting of the hardware address isn't supported.
68 * o Hardware padding isn't used.
72 * Modifications for Megahertz X-Jack Ethernet Card (XJ-10BT)
74 * Copyright (c) 1996 by Tatsumi Hosokawa <hosokawa@jp.FreeBSD.org>
75 * BSD-nomads, Tokyo, Japan.
78 * Multicast support by Kei TANAKA <kei@pal.xerox.com>
79 * Special thanks to itojun@itojun.org
82 #include <sys/param.h>
83 #include <sys/systm.h>
84 #include <sys/errno.h>
85 #include <sys/sockio.h>
87 #include <sys/socket.h>
88 #include <sys/syslog.h>
90 #include <sys/module.h>
93 #include <machine/bus.h>
94 #include <machine/resource.h>
97 #include <net/ethernet.h>
99 #include <net/if_arp.h>
100 #include <net/if_dl.h>
101 #include <net/if_types.h>
102 #include <net/if_mib.h>
105 #include <netinet/in.h>
106 #include <netinet/in_systm.h>
107 #include <netinet/in_var.h>
108 #include <netinet/ip.h>
112 #include <netns/ns.h>
113 #include <netns/ns_if.h>
117 #include <net/bpfdesc.h>
120 #include <dev/sn/if_snreg.h>
121 #include <dev/sn/if_snvar.h>
123 /* Exported variables */
124 devclass_t sn_devclass;
126 static int snioctl(struct ifnet * ifp, u_long, caddr_t);
128 static void snresume(struct ifnet *);
131 void snread(struct ifnet *);
132 void snreset(struct sn_softc *);
133 void snstart(struct ifnet *);
134 void snstop(struct sn_softc *);
135 void snwatchdog(struct ifnet *);
137 static void sn_setmcast(struct sn_softc *);
138 static int sn_getmcf(struct arpcom *ac, u_char *mcf);
139 static u_int smc_crc(u_char *);
141 /* I (GB) have been unlucky getting the hardware padding
146 static const char *chip_ids[15] = {
148 /* 3 */ "SMC91C90/91C92",
153 /* 8 */ "SMC91C100FD",
159 sn_attach(device_t dev)
161 struct sn_softc *sc = device_get_softc(dev);
162 struct ifnet *ifp = &sc->arpcom.ac_if;
166 struct sockaddr_dl *sdl;
176 sc->pages_wanted = -1;
178 device_printf(dev, " ");
181 rev = inw(BASE + REVISION_REG_W);
182 if (chip_ids[(rev >> 4) & 0xF])
183 printf("%s ", chip_ids[(rev >> 4) & 0xF]);
186 i = inw(BASE + CONFIG_REG_W);
187 printf(i & CR_AUI_SELECT ? "AUI" : "UTP");
189 if (sc->pccard_enaddr)
190 for (j = 0; j < 3; j++) {
193 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
194 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
195 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
199 * Read the station address from the chip. The MAC address is bank 1,
203 p = (u_char *) & sc->arpcom.ac_enaddr;
204 for (i = 0; i < 6; i += 2) {
205 address = inw(BASE + IAR_ADDR0_REG_W + i);
206 p[i + 1] = address >> 8;
207 p[i] = address & 0xFF;
209 printf(" MAC address %6D\n", sc->arpcom.ac_enaddr, ":");
211 ifp->if_unit = device_get_unit(dev);
213 ifp->if_mtu = ETHERMTU;
214 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
215 ifp->if_output = ether_output;
216 ifp->if_start = snstart;
217 ifp->if_ioctl = snioctl;
218 ifp->if_watchdog = snwatchdog;
219 ifp->if_init = sninit;
220 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
223 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
226 * Fill the hardware address into ifa_addr if we find an AF_LINK
227 * entry. We need to do this so bpf's can get the hardware addr of
228 * this card. netstat likes this too!
230 ifa = TAILQ_FIRST(&ifp->if_addrhead);
231 while ((ifa != 0) && (ifa->ifa_addr != 0) &&
232 (ifa->ifa_addr->sa_family != AF_LINK))
233 ifa = TAILQ_NEXT(ifa, ifa_link);
235 if ((ifa != 0) && (ifa->ifa_addr != 0)) {
236 sdl = (struct sockaddr_dl *) ifa->ifa_addr;
237 sdl->sdl_type = IFT_ETHER;
238 sdl->sdl_alen = ETHER_ADDR_LEN;
240 bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
248 sn_detach(device_t dev)
250 struct sn_softc *sc = device_get_softc(dev);
252 sc->arpcom.ac_if.if_flags &= ~IFF_RUNNING;
253 ether_ifdetach(&sc->arpcom.ac_if, ETHER_BPF_SUPPORTED);
259 * Reset and initialize the chip
264 register struct sn_softc *sc = xsc;
265 register struct ifnet *ifp = &sc->arpcom.ac_if;
273 * This resets the registers mostly to defaults, but doesn't affect
274 * EEPROM. After the reset cycle, we pause briefly for the chip to
278 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
280 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
284 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
287 * Set the control register to automatically release succesfully
288 * transmitted packets (making the best use out of our limited
289 * memory) and to enable the EPH interrupt on certain TX errors.
292 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
293 CTR_CR_ENABLE | CTR_LE_ENABLE));
295 /* Set squelch level to 240mV (default 480mV) */
296 flags = inw(BASE + CONFIG_REG_W);
297 flags |= CR_SET_SQLCH;
298 outw(BASE + CONFIG_REG_W, flags);
301 * Reset the MMU and wait for it to be un-busy.
304 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
305 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
309 * Disable all interrupts
311 outb(BASE + INTR_MASK_REG_B, 0x00);
316 * Set the transmitter control. We want it enabled.
322 * I (GB) have been unlucky getting this to work.
324 flags |= TCR_PAD_ENABLE;
327 outw(BASE + TXMIT_CONTROL_REG_W, flags);
331 * Now, enable interrupts
340 outb(BASE + INTR_MASK_REG_B, mask);
341 sc->intr_mask = mask;
342 sc->pages_wanted = -1;
346 * Mark the interface running but not active.
348 ifp->if_flags |= IFF_RUNNING;
349 ifp->if_flags &= ~IFF_OACTIVE;
352 * Attempt to push out any waiting packets.
361 snstart(struct ifnet *ifp)
363 register struct sn_softc *sc = ifp->if_softc;
365 register struct mbuf *m;
377 if (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) {
381 if (sc->pages_wanted != -1) {
383 printf("sn%d: snstart() while memory allocation pending\n",
390 * Sneak a peek at the next packet
392 m = sc->arpcom.ac_if.if_snd.ifq_head;
398 * Compute the frame length and set pad to give an overall even
399 * number of bytes. Below we assume that the packet length is even.
401 for (len = 0, top = m; m; m = m->m_next)
407 * We drop packets that are too large. Perhaps we should truncate
410 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
411 printf("sn%d: large packet discarded (A)\n", ifp->if_unit);
412 ++sc->arpcom.ac_if.if_oerrors;
413 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
420 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
422 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
423 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
430 * The MMU wants the number of pages to be the number of 256 byte
431 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
432 * include space for the status word, byte count and control bytes in
433 * the allocation request.
435 numPages = (length + 6) >> 8;
439 * Now, try to allocate the memory
442 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
445 * Wait a short amount of time to see if the allocation request
446 * completes. Otherwise, I enable the interrupt and wait for
447 * completion asyncronously.
450 time_out = MEMORY_WAIT_TIME;
452 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
454 } while (--time_out);
456 if (!time_out || junk > 10) {
459 * No memory now. Oh well, wait until the chip finds memory
460 * later. Remember how many pages we were asking for and
461 * enable the allocation completion interrupt. Also set a
462 * watchdog in case we miss the interrupt. We mark the
463 * interface active since there is no point in attempting an
464 * snstart() until after the memory is available.
466 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
467 outb(BASE + INTR_MASK_REG_B, mask);
468 sc->intr_mask = mask;
470 sc->arpcom.ac_if.if_timer = 1;
471 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
472 sc->pages_wanted = numPages;
478 * The memory allocation completed. Check the results.
480 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
481 if (packet_no & ARR_FAILED) {
483 printf("sn%d: Memory allocation failed\n", ifp->if_unit);
487 * We have a packet number, so tell the card to use it.
489 outb(BASE + PACKET_NUM_REG_B, packet_no);
492 * Point to the beginning of the packet
494 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
497 * Send the packet length (+6 for status, length and control byte)
498 * and the status word (set to zeros)
500 outw(BASE + DATA_REG_W, 0);
501 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
502 outb(BASE + DATA_REG_B, (length + 6) >> 8);
505 * Get the packet from the kernel. This will include the Ethernet
506 * frame header, MAC Addresses etc.
508 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
511 * Push out the data to the card.
513 for (top = m; m != 0; m = m->m_next) {
518 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
521 * Push out remaining byte.
524 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
531 outw(BASE + DATA_REG_W, 0);
535 outb(BASE + DATA_REG_B, 0);
538 * Push out control byte and unused packet byte The control byte is 0
539 * meaning the packet is even lengthed and no special CRC handling is
542 outw(BASE + DATA_REG_W, 0);
545 * Enable the interrupts and let the chipset deal with it Also set a
546 * watchdog in case we miss the interrupt.
548 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
549 outb(BASE + INTR_MASK_REG_B, mask);
550 sc->intr_mask = mask;
552 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
554 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
555 sc->arpcom.ac_if.if_timer = 1;
561 sc->arpcom.ac_if.if_opackets++;
568 * Is another packet coming in? We don't want to overflow the tiny
569 * RX FIFO. If nothing has arrived then attempt to queue another
572 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
581 /* Resume a packet transmit operation after a memory allocation
584 * This is basically a hacked up copy of snstart() which handles
585 * a completed memory allocation the same way snstart() does.
586 * It then passes control to snstart to handle any other queued
590 snresume(struct ifnet *ifp)
592 register struct sn_softc *sc = ifp->if_softc;
594 register struct mbuf *m;
600 u_short pages_wanted;
603 if (sc->pages_wanted < 0)
606 pages_wanted = sc->pages_wanted;
607 sc->pages_wanted = -1;
610 * Sneak a peek at the next packet
612 m = sc->arpcom.ac_if.if_snd.ifq_head;
614 printf("sn%d: snresume() with nothing to send\n", ifp->if_unit);
618 * Compute the frame length and set pad to give an overall even
619 * number of bytes. Below we assume that the packet length is even.
621 for (len = 0, top = m; m; m = m->m_next)
627 * We drop packets that are too large. Perhaps we should truncate
630 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
631 printf("sn%d: large packet discarded (B)\n", ifp->if_unit);
632 ++sc->arpcom.ac_if.if_oerrors;
633 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
640 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
642 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
643 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
651 * The MMU wants the number of pages to be the number of 256 byte
652 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
653 * include space for the status word, byte count and control bytes in
654 * the allocation request.
656 numPages = (length + 6) >> 8;
662 * The memory allocation completed. Check the results. If it failed,
663 * we simply set a watchdog timer and hope for the best.
665 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
666 if (packet_no & ARR_FAILED) {
667 printf("sn%d: Memory allocation failed. Weird.\n", ifp->if_unit);
668 sc->arpcom.ac_if.if_timer = 1;
672 * We have a packet number, so tell the card to use it.
674 outb(BASE + PACKET_NUM_REG_B, packet_no);
677 * Now, numPages should match the pages_wanted recorded when the
678 * memory allocation was initiated.
680 if (pages_wanted != numPages) {
681 printf("sn%d: memory allocation wrong size. Weird.\n", ifp->if_unit);
683 * If the allocation was the wrong size we simply release the
684 * memory once it is granted. Wait for the MMU to be un-busy.
686 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
688 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
693 * Point to the beginning of the packet
695 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
698 * Send the packet length (+6 for status, length and control byte)
699 * and the status word (set to zeros)
701 outw(BASE + DATA_REG_W, 0);
702 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
703 outb(BASE + DATA_REG_B, (length + 6) >> 8);
706 * Get the packet from the kernel. This will include the Ethernet
707 * frame header, MAC Addresses etc.
709 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
712 * Push out the data to the card.
714 for (top = m; m != 0; m = m->m_next) {
719 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
722 * Push out remaining byte.
725 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
732 outw(BASE + DATA_REG_W, 0);
736 outb(BASE + DATA_REG_B, 0);
739 * Push out control byte and unused packet byte The control byte is 0
740 * meaning the packet is even lengthed and no special CRC handling is
743 outw(BASE + DATA_REG_W, 0);
746 * Enable the interrupts and let the chipset deal with it Also set a
747 * watchdog in case we miss the interrupt.
749 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
750 outb(BASE + INTR_MASK_REG_B, mask);
751 sc->intr_mask = mask;
752 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
758 sc->arpcom.ac_if.if_opackets++;
764 * Now pass control to snstart() to queue any additional packets
766 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
770 * We've sent something, so we're active. Set a watchdog in case the
771 * TX_EMPTY interrupt is lost.
773 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
774 sc->arpcom.ac_if.if_timer = 1;
783 int status, interrupts;
784 register struct sn_softc *sc = (struct sn_softc *) arg;
785 struct ifnet *ifp = &sc->arpcom.ac_if;
789 * Chip state registers
797 * if_ep.c did this, so I do too. Yet if_ed.c doesn't. I wonder...
802 * Clear the watchdog.
809 * Obtain the current interrupt mask and clear the hardware mask
810 * while servicing interrupts.
812 mask = inb(BASE + INTR_MASK_REG_B);
813 outb(BASE + INTR_MASK_REG_B, 0x00);
816 * Get the set of interrupts which occurred and eliminate any which
819 interrupts = inb(BASE + INTR_STAT_REG_B);
820 status = interrupts & mask;
823 * Now, process each of the interrupt types.
829 if (status & IM_RX_OVRN_INT) {
831 * Acknowlege Interrupt
834 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
836 ++sc->arpcom.ac_if.if_ierrors;
841 if (status & IM_RCV_INT) {
845 packet_number = inw(BASE + FIFO_PORTS_REG_W);
847 if (packet_number & FIFO_REMPTY) {
849 * we got called , but nothing was on the FIFO
851 printf("sn: Receive interrupt with nothing on FIFO\n");
857 * An on-card memory allocation came through.
859 if (status & IM_ALLOC_INT) {
861 * Disable this interrupt.
863 mask &= ~IM_ALLOC_INT;
864 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
865 snresume(&sc->arpcom.ac_if);
868 * TX Completion. Handle a transmit error message. This will only be
869 * called when there is an error, because of the AUTO_RELEASE mode.
871 if (status & IM_TX_INT) {
873 * Acknowlege Interrupt
876 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
878 packet_no = inw(BASE + FIFO_PORTS_REG_W);
879 packet_no &= FIFO_TX_MASK;
882 * select this as the packet to read from
884 outb(BASE + PACKET_NUM_REG_B, packet_no);
887 * Position the pointer to the first word from this packet
889 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
892 * Fetch the TX status word. The value found here will be a
893 * copy of the EPH_STATUS_REG_W at the time the transmit
896 tx_status = inw(BASE + DATA_REG_W);
898 if (tx_status & EPHSR_TX_SUC) {
899 device_printf(sc->dev,
900 "Successful packet caused interrupt\n");
902 ++sc->arpcom.ac_if.if_oerrors;
905 if (tx_status & EPHSR_LATCOL)
906 ++sc->arpcom.ac_if.if_collisions;
909 * Some of these errors will have disabled transmit.
910 * Re-enable transmit now.
915 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
917 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
921 * kill the failed packet. Wait for the MMU to be un-busy.
924 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
926 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
929 * Attempt to queue more transmits.
931 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
932 snstart(&sc->arpcom.ac_if);
935 * Transmit underrun. We use this opportunity to update transmit
936 * statistics from the card.
938 if (status & IM_TX_EMPTY_INT) {
941 * Acknowlege Interrupt
944 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
947 * Disable this interrupt.
949 mask &= ~IM_TX_EMPTY_INT;
952 card_stats = inw(BASE + COUNTER_REG_W);
957 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
960 * Multiple collisions
962 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
967 * Attempt to enqueue some more stuff.
969 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
970 snstart(&sc->arpcom.ac_if);
973 * Some other error. Try to fix it by resetting the adapter.
975 if (status & IM_EPH_INT) {
982 * Handled all interrupt sources.
988 * Reestablish interrupts from mask which have not been deselected
989 * during this interrupt. Note that the hardware mask, which was set
990 * to 0x00 at the start of this service routine, may have been
991 * updated by one or more of the interrupt handers and we must let
992 * those new interrupts stay enabled here.
994 mask |= inb(BASE + INTR_MASK_REG_B);
995 outb(BASE + INTR_MASK_REG_B, mask);
996 sc->intr_mask = mask;
1002 snread(register struct ifnet *ifp)
1004 struct sn_softc *sc = ifp->if_softc;
1005 struct ether_header *eh;
1009 u_short packet_length;
1014 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1016 if (packet_number & FIFO_REMPTY) {
1019 * we got called , but nothing was on the FIFO
1021 printf("sn: Receive interrupt with nothing on FIFO\n");
1028 * Start reading from the start of the packet. Since PTR_RCV is set,
1029 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
1031 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
1034 * First two words are status and packet_length
1036 status = inw(BASE + DATA_REG_W);
1037 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
1040 * The packet length contains 3 extra words: status, length, and a
1041 * extra word with the control byte.
1046 * Account for receive errors and discard.
1048 if (status & RS_ERRORS) {
1049 ++sc->arpcom.ac_if.if_ierrors;
1053 * A packet is received.
1057 * Adjust for odd-length packet.
1059 if (status & RS_ODDFRAME)
1063 * Allocate a header mbuf from the kernel.
1065 MGETHDR(m, M_DONTWAIT, MT_DATA);
1069 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1070 m->m_pkthdr.len = m->m_len = packet_length;
1073 * Attach an mbuf cluster
1075 MCLGET(m, M_DONTWAIT);
1078 * Insist on getting a cluster
1080 if ((m->m_flags & M_EXT) == 0) {
1082 ++sc->arpcom.ac_if.if_ierrors;
1083 printf("sn: snread() kernel memory allocation problem\n");
1086 eh = mtod(m, struct ether_header *);
1089 * Get packet, including link layer address, from interface.
1092 data = (u_char *) eh;
1093 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1094 if (packet_length & 1) {
1095 data += packet_length & ~1;
1096 *data = inb(BASE + DATA_REG_B);
1098 ++sc->arpcom.ac_if.if_ipackets;
1101 * Remove link layer addresses and whatnot.
1103 m->m_pkthdr.len = m->m_len = packet_length - sizeof(struct ether_header);
1104 m->m_data += sizeof(struct ether_header);
1106 ether_input(&sc->arpcom.ac_if, eh, m);
1111 * Error or good, tell the card to get rid of this packet Wait for
1112 * the MMU to be un-busy.
1115 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1117 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1120 * Check whether another packet is ready
1122 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1123 if (packet_number & FIFO_REMPTY) {
1131 * Handle IOCTLS. This function is completely stolen from if_ep.c
1132 * As with its progenitor, it does not handle hardware address
1136 snioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
1138 struct sn_softc *sc = ifp->if_softc;
1147 error = ether_ioctl(ifp, cmd, data);
1151 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1152 ifp->if_flags &= ~IFF_RUNNING;
1156 /* reinitialize card on any parameter change */
1164 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1165 sizeof(sc->sc_addr));
1170 /* update multicast filter list. */
1175 /* update multicast filter list. */
1189 snreset(struct sn_softc *sc)
1201 snwatchdog(struct ifnet *ifp)
1205 sn_intr(ifp->if_softc);
1210 /* 1. zero the interrupt mask
1211 * 2. clear the enable receive flag
1212 * 3. clear the enable xmit flags
1215 snstop(struct sn_softc *sc)
1218 struct ifnet *ifp = &sc->arpcom.ac_if;
1221 * Clear interrupt mask; disable all interrupts.
1224 outb(BASE + INTR_MASK_REG_B, 0x00);
1227 * Disable transmitter and Receiver
1230 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1231 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1241 sn_activate(device_t dev)
1243 struct sn_softc *sc = device_get_softc(dev);
1247 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1248 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1249 if (!sc->port_res) {
1251 device_printf(dev, "Cannot allocate ioport\n");
1256 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid,
1257 0, ~0, 1, RF_ACTIVE);
1260 device_printf(dev, "Cannot allocate irq\n");
1264 if ((err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, sn_intr, sc,
1265 &sc->intrhand)) != 0) {
1270 sc->sn_io_addr = rman_get_start(sc->port_res);
1275 sn_deactivate(device_t dev)
1277 struct sn_softc *sc = device_get_softc(dev);
1280 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
1283 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1287 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1294 * Function: sn_probe( device_t dev, int pccard )
1297 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1298 * Tries to cause as little damage as possible if it's not a SMC chip.
1299 * Returns a 0 on success
1302 * (1) see if the high byte of BANK_SELECT is 0x33
1303 * (2) compare the ioaddr with the base register's address
1304 * (3) see if I recognize the chip ID in the appropriate register
1309 sn_probe(device_t dev, int pccard)
1311 struct sn_softc *sc = device_get_softc(dev);
1313 u_short revision_register;
1314 u_short base_address_register;
1318 if ((err = sn_activate(dev)) != 0)
1321 ioaddr = sc->sn_io_addr;
1323 device_printf(dev, "ioaddr is 0x%x\n", ioaddr);
1326 * First, see if the high byte is 0x33
1328 bank = inw(ioaddr + BANK_SELECT_REG_W);
1329 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1331 device_printf(dev, "test1 failed\n");
1336 * The above MIGHT indicate a device, but I need to write to further
1337 * test this. Go to bank 0, then test that the register still
1338 * reports the high byte is 0x33.
1340 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1341 bank = inw(ioaddr + BANK_SELECT_REG_W);
1342 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1344 device_printf(dev, "test2 failed\n");
1349 * well, we've already written once, so hopefully another time won't
1350 * hurt. This time, I need to switch the bank register to bank 1, so
1351 * I can access the base address register. The contents of the
1352 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1353 * to match the I/O port address where the adapter is being probed.
1355 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1356 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1359 * This test is nonsence on PC-card architecture, so if
1360 * pccard == 1, skip this test. (hosokawa)
1362 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1365 * Well, the base address register didn't match. Must not
1366 * have been a SMC chip after all.
1369 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1370 "base_address_register = 0x%x\n", ioaddr,
1371 base_address_register >> 3 & 0x3E0);
1377 * Check if the revision register is something that I recognize.
1378 * These might need to be added to later, as future revisions could
1381 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1382 revision_register = inw(ioaddr + REVISION_REG_W);
1383 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1386 * I don't regonize this chip, so...
1389 device_printf(dev, "test4 failed\n");
1395 * at this point I'll assume that the chip is an SMC9xxx. It might be
1396 * prudent to check a listing of MAC addresses against the hardware
1397 * address, or do some other tests.
1409 sn_setmcast(struct sn_softc *sc)
1411 struct ifnet *ifp = (struct ifnet *)sc;
1415 * Set the receiver filter. We want receive enabled and auto strip
1416 * of CRC from received packet. If we are promiscuous then set that
1419 flags = RCR_ENABLE | RCR_STRIP_CRC;
1421 if (ifp->if_flags & IFF_PROMISC) {
1422 flags |= RCR_PROMISC | RCR_ALMUL;
1423 } else if (ifp->if_flags & IFF_ALLMULTI) {
1427 if (sn_getmcf(&sc->arpcom, mcf)) {
1430 outw(BASE + MULTICAST1_REG_W,
1431 ((u_short)mcf[1] << 8) | mcf[0]);
1432 outw(BASE + MULTICAST2_REG_W,
1433 ((u_short)mcf[3] << 8) | mcf[2]);
1434 outw(BASE + MULTICAST3_REG_W,
1435 ((u_short)mcf[5] << 8) | mcf[4]);
1436 outw(BASE + MULTICAST4_REG_W,
1437 ((u_short)mcf[7] << 8) | mcf[6]);
1443 outw(BASE + RECV_CONTROL_REG_W, flags);
1447 sn_getmcf(struct arpcom *ac, u_char *mcf)
1450 register u_int index, index2;
1451 register u_char *af = (u_char *) mcf;
1452 struct ifmultiaddr *ifma;
1456 TAILQ_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) {
1457 if (ifma->ifma_addr->sa_family != AF_LINK)
1459 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1461 for (i = 0; i < 6; i++) {
1463 index2 |= (index & 0x01);
1466 af[index2 >> 3] |= 1 << (index2 & 7);
1468 return 1; /* use multicast filter */
1476 const u_int poly = 0xedb88320;
1477 u_int v = 0xffffffff;
1480 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1482 for (perBit = 0; perBit < 8; perBit++) {
1483 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);