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 1.25 2005/12/31 14:08:00 sephe 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>
94 #include <sys/serialize.h>
95 #include <sys/thread2.h>
97 #include <sys/module.h>
100 #include <machine/bus.h>
101 #include <machine/resource.h>
102 #include <sys/rman.h>
104 #include <net/ethernet.h>
106 #include <net/ifq_var.h>
107 #include <net/if_arp.h>
108 #include <net/if_dl.h>
109 #include <net/if_types.h>
110 #include <net/if_mib.h>
113 #include <netinet/in.h>
114 #include <netinet/in_systm.h>
115 #include <netinet/in_var.h>
116 #include <netinet/ip.h>
120 #include <netns/ns.h>
121 #include <netns/ns_if.h>
125 #include <net/bpfdesc.h>
127 #include <machine/clock.h>
129 #include "if_snreg.h"
130 #include "if_snvar.h"
132 /* Exported variables */
133 devclass_t sn_devclass;
135 static int snioctl(struct ifnet * ifp, u_long, caddr_t, struct ucred *);
137 static void snresume(struct ifnet *);
140 void snread(struct ifnet *);
141 void snreset(struct sn_softc *);
142 void snstart(struct ifnet *);
143 void snstop(struct sn_softc *);
144 void snwatchdog(struct ifnet *);
146 static void sn_setmcast(struct sn_softc *);
147 static int sn_getmcf(struct arpcom *ac, u_char *mcf);
148 static u_int smc_crc(u_char *);
150 DECLARE_DUMMY_MODULE(if_sn);
152 /* I (GB) have been unlucky getting the hardware padding
157 static const char *chip_ids[15] = {
159 /* 3 */ "SMC91C90/91C92",
164 /* 8 */ "SMC91C100FD",
170 sn_attach(device_t dev)
172 struct sn_softc *sc = device_get_softc(dev);
173 struct ifnet *ifp = &sc->arpcom.ac_if;
186 sc->pages_wanted = -1;
188 device_printf(dev, " ");
191 rev = inw(BASE + REVISION_REG_W);
192 if (chip_ids[(rev >> 4) & 0xF])
193 printf("%s ", chip_ids[(rev >> 4) & 0xF]);
196 i = inw(BASE + CONFIG_REG_W);
197 printf("%s\n", i & CR_AUI_SELECT ? "AUI" : "UTP");
199 if (sc->pccard_enaddr)
200 for (j = 0; j < 3; j++) {
203 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
204 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
205 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
209 * Read the station address from the chip. The MAC address is bank 1,
213 p = (u_char *) & sc->arpcom.ac_enaddr;
214 for (i = 0; i < 6; i += 2) {
215 address = inw(BASE + IAR_ADDR0_REG_W + i);
216 p[i + 1] = address >> 8;
217 p[i] = address & 0xFF;
220 if_initname(ifp, "sn", device_get_unit(dev));
221 ifp->if_mtu = ETHERMTU;
222 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
223 ifp->if_start = snstart;
224 ifp->if_ioctl = snioctl;
225 ifp->if_watchdog = snwatchdog;
226 ifp->if_init = sninit;
227 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
228 ifq_set_ready(&ifp->if_snd);
231 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
233 error = bus_setup_intr(dev, sc->irq_res, INTR_NETSAFE,
234 sn_intr, sc, &sc->intrhand,
247 * Reset and initialize the chip
252 struct sn_softc *sc = xsc;
253 struct ifnet *ifp = &sc->arpcom.ac_if;
258 * This resets the registers mostly to defaults, but doesn't affect
259 * EEPROM. After the reset cycle, we pause briefly for the chip to
263 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
265 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
269 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
272 * Set the control register to automatically release succesfully
273 * transmitted packets (making the best use out of our limited
274 * memory) and to enable the EPH interrupt on certain TX errors.
277 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
278 CTR_CR_ENABLE | CTR_LE_ENABLE));
280 /* Set squelch level to 240mV (default 480mV) */
281 flags = inw(BASE + CONFIG_REG_W);
282 flags |= CR_SET_SQLCH;
283 outw(BASE + CONFIG_REG_W, flags);
286 * Reset the MMU and wait for it to be un-busy.
289 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
290 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
294 * Disable all interrupts
296 outb(BASE + INTR_MASK_REG_B, 0x00);
301 * Set the transmitter control. We want it enabled.
307 * I (GB) have been unlucky getting this to work.
309 flags |= TCR_PAD_ENABLE;
312 outw(BASE + TXMIT_CONTROL_REG_W, flags);
316 * Now, enable interrupts
325 outb(BASE + INTR_MASK_REG_B, mask);
326 sc->intr_mask = mask;
327 sc->pages_wanted = -1;
331 * Mark the interface running but not active.
333 ifp->if_flags |= IFF_RUNNING;
334 ifp->if_flags &= ~IFF_OACTIVE;
337 * Attempt to push out any waiting packets.
344 snstart(struct ifnet *ifp)
346 struct sn_softc *sc = ifp->if_softc;
357 if (ifp->if_flags & IFF_OACTIVE) {
360 if (sc->pages_wanted != -1) {
361 printf("%s: snstart() while memory allocation pending\n",
368 * Sneak a peek at the next packet
370 m = ifq_poll(&ifp->if_snd);
375 * Compute the frame length and set pad to give an overall even
376 * number of bytes. Below we assume that the packet length is even.
378 for (len = 0, top = m; m; m = m->m_next)
384 * We drop packets that are too large. Perhaps we should truncate
387 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
388 printf("%s: large packet discarded (A)\n", ifp->if_xname);
389 ++sc->arpcom.ac_if.if_oerrors;
390 ifq_dequeue(&ifp->if_snd, m);
397 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
399 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
400 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
407 * The MMU wants the number of pages to be the number of 256 byte
408 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
409 * include space for the status word, byte count and control bytes in
410 * the allocation request.
412 numPages = (length + 6) >> 8;
416 * Now, try to allocate the memory
419 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
422 * Wait a short amount of time to see if the allocation request
423 * completes. Otherwise, I enable the interrupt and wait for
424 * completion asyncronously.
427 time_out = MEMORY_WAIT_TIME;
429 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
431 } while (--time_out);
436 * No memory now. Oh well, wait until the chip finds memory
437 * later. Remember how many pages we were asking for and
438 * enable the allocation completion interrupt. Also set a
439 * watchdog in case we miss the interrupt. We mark the
440 * interface active since there is no point in attempting an
441 * snstart() until after the memory is available.
443 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
444 outb(BASE + INTR_MASK_REG_B, mask);
445 sc->intr_mask = mask;
448 ifp->if_flags |= IFF_OACTIVE;
449 sc->pages_wanted = numPages;
454 * The memory allocation completed. Check the results.
456 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
457 if (packet_no & ARR_FAILED) {
458 printf("%s: Memory allocation failed\n", ifp->if_xname);
462 * We have a packet number, so tell the card to use it.
464 outb(BASE + PACKET_NUM_REG_B, packet_no);
467 * Point to the beginning of the packet
469 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
472 * Send the packet length (+6 for status, length and control byte)
473 * and the status word (set to zeros)
475 outw(BASE + DATA_REG_W, 0);
476 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
477 outb(BASE + DATA_REG_B, (length + 6) >> 8);
480 * Get the packet from the kernel. This will include the Ethernet
481 * frame header, MAC Addresses etc.
483 ifq_dequeue(&ifp->if_snd, m);
486 * Push out the data to the card.
488 for (top = m; m != 0; m = m->m_next) {
493 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
496 * Push out remaining byte.
499 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
506 outw(BASE + DATA_REG_W, 0);
510 outb(BASE + DATA_REG_B, 0);
513 * Push out control byte and unused packet byte The control byte is 0
514 * meaning the packet is even lengthed and no special CRC handling is
517 outw(BASE + DATA_REG_W, 0);
520 * Enable the interrupts and let the chipset deal with it Also set a
521 * watchdog in case we miss the interrupt.
523 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
524 outb(BASE + INTR_MASK_REG_B, mask);
525 sc->intr_mask = mask;
527 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
529 ifp->if_flags |= IFF_OACTIVE;
540 * Is another packet coming in? We don't want to overflow the tiny
541 * RX FIFO. If nothing has arrived then attempt to queue another
544 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
550 /* Resume a packet transmit operation after a memory allocation
553 * This is basically a hacked up copy of snstart() which handles
554 * a completed memory allocation the same way snstart() does.
555 * It then passes control to snstart to handle any other queued
559 snresume(struct ifnet *ifp)
561 struct sn_softc *sc = ifp->if_softc;
569 u_short pages_wanted;
572 if (sc->pages_wanted < 0)
575 pages_wanted = sc->pages_wanted;
576 sc->pages_wanted = -1;
579 * Sneak a peek at the next packet
581 m = ifq_poll(&ifp->if_snd);
583 printf("%s: snresume() with nothing to send\n", ifp->if_xname);
587 * Compute the frame length and set pad to give an overall even
588 * number of bytes. Below we assume that the packet length is even.
590 for (len = 0, top = m; m; m = m->m_next)
596 * We drop packets that are too large. Perhaps we should truncate
599 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
600 printf("%s: large packet discarded (B)\n", ifp->if_xname);
602 ifq_dequeue(&ifp->if_snd, m);
609 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
611 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
612 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
620 * The MMU wants the number of pages to be the number of 256 byte
621 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
622 * include space for the status word, byte count and control bytes in
623 * the allocation request.
625 numPages = (length + 6) >> 8;
631 * The memory allocation completed. Check the results. If it failed,
632 * we simply set a watchdog timer and hope for the best.
634 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
635 if (packet_no & ARR_FAILED) {
636 printf("%s: Memory allocation failed. Weird.\n", ifp->if_xname);
641 * We have a packet number, so tell the card to use it.
643 outb(BASE + PACKET_NUM_REG_B, packet_no);
646 * Now, numPages should match the pages_wanted recorded when the
647 * memory allocation was initiated.
649 if (pages_wanted != numPages) {
650 printf("%s: memory allocation wrong size. Weird.\n", ifp->if_xname);
652 * If the allocation was the wrong size we simply release the
653 * memory once it is granted. Wait for the MMU to be un-busy.
655 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
657 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
662 * Point to the beginning of the packet
664 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
667 * Send the packet length (+6 for status, length and control byte)
668 * and the status word (set to zeros)
670 outw(BASE + DATA_REG_W, 0);
671 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
672 outb(BASE + DATA_REG_B, (length + 6) >> 8);
675 * Get the packet from the kernel. This will include the Ethernet
676 * frame header, MAC Addresses etc.
678 ifq_dequeue(&ifp->if_snd, m);
681 * Push out the data to the card.
683 for (top = m; m != 0; m = m->m_next) {
688 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
691 * Push out remaining byte.
694 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
701 outw(BASE + DATA_REG_W, 0);
705 outb(BASE + DATA_REG_B, 0);
708 * Push out control byte and unused packet byte The control byte is 0
709 * meaning the packet is even lengthed and no special CRC handling is
712 outw(BASE + DATA_REG_W, 0);
715 * Enable the interrupts and let the chipset deal with it Also set a
716 * watchdog in case we miss the interrupt.
718 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
719 outb(BASE + INTR_MASK_REG_B, mask);
720 sc->intr_mask = mask;
721 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
731 * Now pass control to snstart() to queue any additional packets
733 ifp->if_flags &= ~IFF_OACTIVE;
737 * We've sent something, so we're active. Set a watchdog in case the
738 * TX_EMPTY interrupt is lost.
740 ifp->if_flags |= IFF_OACTIVE;
748 int status, interrupts;
749 struct sn_softc *sc = (struct sn_softc *) arg;
750 struct ifnet *ifp = &sc->arpcom.ac_if;
753 * Chip state registers
761 * Clear the watchdog.
768 * Obtain the current interrupt mask and clear the hardware mask
769 * while servicing interrupts.
771 mask = inb(BASE + INTR_MASK_REG_B);
772 outb(BASE + INTR_MASK_REG_B, 0x00);
775 * Get the set of interrupts which occurred and eliminate any which
778 interrupts = inb(BASE + INTR_STAT_REG_B);
779 status = interrupts & mask;
782 * Now, process each of the interrupt types.
788 if (status & IM_RX_OVRN_INT) {
791 * Acknowlege Interrupt
794 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
796 ++sc->arpcom.ac_if.if_ierrors;
801 if (status & IM_RCV_INT) {
806 packet_number = inw(BASE + FIFO_PORTS_REG_W);
808 if (packet_number & FIFO_REMPTY) {
811 * we got called , but nothing was on the FIFO
813 printf("sn: Receive interrupt with nothing on FIFO\n");
821 * An on-card memory allocation came through.
823 if (status & IM_ALLOC_INT) {
826 * Disable this interrupt.
828 mask &= ~IM_ALLOC_INT;
829 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
830 snresume(&sc->arpcom.ac_if);
833 * TX Completion. Handle a transmit error message. This will only be
834 * called when there is an error, because of the AUTO_RELEASE mode.
836 if (status & IM_TX_INT) {
839 * Acknowlege Interrupt
842 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
844 packet_no = inw(BASE + FIFO_PORTS_REG_W);
845 packet_no &= FIFO_TX_MASK;
848 * select this as the packet to read from
850 outb(BASE + PACKET_NUM_REG_B, packet_no);
853 * Position the pointer to the first word from this packet
855 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
858 * Fetch the TX status word. The value found here will be a
859 * copy of the EPH_STATUS_REG_W at the time the transmit
862 tx_status = inw(BASE + DATA_REG_W);
864 if (tx_status & EPHSR_TX_SUC) {
865 device_printf(sc->dev,
866 "Successful packet caused interrupt\n");
868 ++sc->arpcom.ac_if.if_oerrors;
871 if (tx_status & EPHSR_LATCOL)
872 ++sc->arpcom.ac_if.if_collisions;
875 * Some of these errors will have disabled transmit.
876 * Re-enable transmit now.
881 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
883 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
887 * kill the failed packet. Wait for the MMU to be un-busy.
890 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
892 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
895 * Attempt to queue more transmits.
897 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
898 snstart(&sc->arpcom.ac_if);
901 * Transmit underrun. We use this opportunity to update transmit
902 * statistics from the card.
904 if (status & IM_TX_EMPTY_INT) {
907 * Acknowlege Interrupt
910 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
913 * Disable this interrupt.
915 mask &= ~IM_TX_EMPTY_INT;
918 card_stats = inw(BASE + COUNTER_REG_W);
923 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
926 * Multiple collisions
928 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
933 * Attempt to enqueue some more stuff.
935 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
936 snstart(&sc->arpcom.ac_if);
939 * Some other error. Try to fix it by resetting the adapter.
941 if (status & IM_EPH_INT) {
948 * Handled all interrupt sources.
954 * Reestablish interrupts from mask which have not been deselected
955 * during this interrupt. Note that the hardware mask, which was set
956 * to 0x00 at the start of this service routine, may have been
957 * updated by one or more of the interrupt handers and we must let
958 * those new interrupts stay enabled here.
960 mask |= inb(BASE + INTR_MASK_REG_B);
961 outb(BASE + INTR_MASK_REG_B, mask);
962 sc->intr_mask = mask;
966 snread(struct ifnet *ifp)
968 struct sn_softc *sc = ifp->if_softc;
972 u_short packet_length;
977 packet_number = inw(BASE + FIFO_PORTS_REG_W);
979 if (packet_number & FIFO_REMPTY) {
982 * we got called , but nothing was on the FIFO
984 printf("sn: Receive interrupt with nothing on FIFO\n");
991 * Start reading from the start of the packet. Since PTR_RCV is set,
992 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
994 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
997 * First two words are status and packet_length
999 status = inw(BASE + DATA_REG_W);
1000 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
1003 * The packet length contains 3 extra words: status, length, and a
1004 * extra word with the control byte.
1009 * Account for receive errors and discard.
1011 if (status & RS_ERRORS) {
1016 * A packet is received.
1020 * Adjust for odd-length packet.
1022 if (status & RS_ODDFRAME)
1026 * Allocate a header mbuf from the kernel.
1028 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1032 m->m_pkthdr.rcvif = ifp;
1033 m->m_pkthdr.len = m->m_len = packet_length;
1036 * Attach an mbuf cluster
1038 MCLGET(m, MB_DONTWAIT);
1041 * Insist on getting a cluster
1043 if ((m->m_flags & M_EXT) == 0) {
1046 printf("sn: snread() kernel memory allocation problem\n");
1051 * Get packet, including link layer address, from interface.
1054 data = mtod(m, u_char *);
1055 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1056 if (packet_length & 1) {
1057 data += packet_length & ~1;
1058 *data = inb(BASE + DATA_REG_B);
1062 m->m_pkthdr.len = m->m_len = packet_length;
1064 ifp->if_input(ifp, m);
1069 * Error or good, tell the card to get rid of this packet Wait for
1070 * the MMU to be un-busy.
1073 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1075 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1078 * Check whether another packet is ready
1080 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1081 if (packet_number & FIFO_REMPTY) {
1089 * Handle IOCTLS. This function is completely stolen from if_ep.c
1090 * As with its progenitor, it does not handle hardware address
1094 snioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1096 struct sn_softc *sc = ifp->if_softc;
1101 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1102 ifp->if_flags &= ~IFF_RUNNING;
1106 /* reinitialize card on any parameter change */
1114 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1115 sizeof(sc->sc_addr));
1120 /* update multicast filter list. */
1125 /* update multicast filter list. */
1130 error = ether_ioctl(ifp, cmd, data);
1138 snreset(struct sn_softc *sc)
1145 snwatchdog(struct ifnet *ifp)
1147 sn_intr(ifp->if_softc);
1151 /* 1. zero the interrupt mask
1152 * 2. clear the enable receive flag
1153 * 3. clear the enable xmit flags
1156 snstop(struct sn_softc *sc)
1159 struct ifnet *ifp = &sc->arpcom.ac_if;
1162 * Clear interrupt mask; disable all interrupts.
1165 outb(BASE + INTR_MASK_REG_B, 0x00);
1168 * Disable transmitter and Receiver
1171 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1172 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1182 sn_activate(device_t dev)
1184 struct sn_softc *sc = device_get_softc(dev);
1187 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1188 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1189 if (!sc->port_res) {
1191 device_printf(dev, "Cannot allocate ioport\n");
1197 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
1201 device_printf(dev, "Cannot allocate irq\n");
1207 sc->sn_io_addr = rman_get_start(sc->port_res);
1212 sn_deactivate(device_t dev)
1214 struct sn_softc *sc = device_get_softc(dev);
1217 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1221 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1228 * Function: sn_probe( device_t dev, int pccard )
1231 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1232 * Tries to cause as little damage as possible if it's not a SMC chip.
1233 * Returns a 0 on success
1236 * (1) see if the high byte of BANK_SELECT is 0x33
1237 * (2) compare the ioaddr with the base register's address
1238 * (3) see if I recognize the chip ID in the appropriate register
1243 sn_probe(device_t dev, int pccard)
1245 struct sn_softc *sc = device_get_softc(dev);
1247 u_short revision_register;
1248 u_short base_address_register;
1252 if ((err = sn_activate(dev)) != 0)
1255 ioaddr = sc->sn_io_addr;
1258 * First, see if the high byte is 0x33
1260 bank = inw(ioaddr + BANK_SELECT_REG_W);
1261 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1263 device_printf(dev, "test1 failed\n");
1268 * The above MIGHT indicate a device, but I need to write to further
1269 * test this. Go to bank 0, then test that the register still
1270 * reports the high byte is 0x33.
1272 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1273 bank = inw(ioaddr + BANK_SELECT_REG_W);
1274 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1276 device_printf(dev, "test2 failed\n");
1281 * well, we've already written once, so hopefully another time won't
1282 * hurt. This time, I need to switch the bank register to bank 1, so
1283 * I can access the base address register. The contents of the
1284 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1285 * to match the I/O port address where the adapter is being probed.
1287 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1288 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1291 * This test is nonsence on PC-card architecture, so if
1292 * pccard == 1, skip this test. (hosokawa)
1294 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1297 * Well, the base address register didn't match. Must not
1298 * have been a SMC chip after all.
1301 * printf("sn: ioaddr %x doesn't match card configuration
1302 * (%x)\n", ioaddr, base_address_register >> 3 & 0x3E0 );
1306 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1307 "base_address_register = 0x%x\n", ioaddr,
1308 base_address_register >> 3 & 0x3E0);
1313 * Check if the revision register is something that I recognize.
1314 * These might need to be added to later, as future revisions could
1317 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1318 revision_register = inw(ioaddr + REVISION_REG_W);
1319 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1322 * I don't regonize this chip, so...
1325 device_printf(dev, "test4 failed\n");
1330 * at this point I'll assume that the chip is an SMC9xxx. It might be
1331 * prudent to check a listing of MAC addresses against the hardware
1332 * address, or do some other tests.
1344 sn_setmcast(struct sn_softc *sc)
1346 struct ifnet *ifp = (struct ifnet *)sc;
1350 * Set the receiver filter. We want receive enabled and auto strip
1351 * of CRC from received packet. If we are promiscuous then set that
1354 flags = RCR_ENABLE | RCR_STRIP_CRC;
1356 if (ifp->if_flags & IFF_PROMISC) {
1357 flags |= RCR_PROMISC | RCR_ALMUL;
1358 } else if (ifp->if_flags & IFF_ALLMULTI) {
1362 if (sn_getmcf(&sc->arpcom, mcf)) {
1365 outw(BASE + MULTICAST1_REG_W,
1366 ((u_short)mcf[1] << 8) | mcf[0]);
1367 outw(BASE + MULTICAST2_REG_W,
1368 ((u_short)mcf[3] << 8) | mcf[2]);
1369 outw(BASE + MULTICAST3_REG_W,
1370 ((u_short)mcf[5] << 8) | mcf[4]);
1371 outw(BASE + MULTICAST4_REG_W,
1372 ((u_short)mcf[7] << 8) | mcf[6]);
1378 outw(BASE + RECV_CONTROL_REG_W, flags);
1382 sn_getmcf(struct arpcom *ac, u_char *mcf)
1385 u_int index, index2;
1386 u_char *af = (u_char *) mcf;
1387 struct ifmultiaddr *ifma;
1391 LIST_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) {
1392 if (ifma->ifma_addr->sa_family != AF_LINK)
1394 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1396 for (i = 0; i < 6; i++) {
1398 index2 |= (index & 0x01);
1401 af[index2 >> 3] |= 1 << (index2 & 7);
1403 return 1; /* use multicast filter */
1411 const u_int poly = 0xedb88320;
1412 u_int v = 0xffffffff;
1415 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1417 for (perBit = 0; perBit < 8; perBit++) {
1418 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);