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 #undef SN_DEBUG /* (by hosokawa) */
84 #include <sys/param.h>
85 #include <sys/systm.h>
86 #include <sys/kernel.h>
87 #include <sys/errno.h>
88 #include <sys/sockio.h>
89 #include <sys/malloc.h>
91 #include <sys/socket.h>
92 #include <sys/syslog.h>
94 #include <sys/module.h>
97 #include <machine/bus.h>
98 #include <machine/resource.h>
101 #include <net/ethernet.h>
103 #include <net/if_arp.h>
104 #include <net/if_dl.h>
105 #include <net/if_types.h>
106 #include <net/if_mib.h>
109 #include <netinet/in.h>
110 #include <netinet/in_systm.h>
111 #include <netinet/in_var.h>
112 #include <netinet/ip.h>
116 #include <netns/ns.h>
117 #include <netns/ns_if.h>
121 #include <net/bpfdesc.h>
123 #include <machine/clock.h>
125 #include <dev/sn/if_snreg.h>
126 #include <dev/sn/if_snvar.h>
128 /* Exported variables */
129 devclass_t sn_devclass;
131 static int snioctl(struct ifnet * ifp, u_long, caddr_t);
133 static void snresume(struct ifnet *);
136 void snread(struct ifnet *);
137 void snreset(struct sn_softc *);
138 void snstart(struct ifnet *);
139 void snstop(struct sn_softc *);
140 void snwatchdog(struct ifnet *);
142 static void sn_setmcast(struct sn_softc *);
143 static int sn_getmcf(struct arpcom *ac, u_char *mcf);
144 static u_int smc_crc(u_char *);
146 /* I (GB) have been unlucky getting the hardware padding
151 static const char *chip_ids[15] = {
153 /* 3 */ "SMC91C90/91C92",
158 NULL, NULL, NULL, NULL,
163 sn_attach(device_t dev)
165 struct sn_softc *sc = device_get_softc(dev);
166 struct ifnet *ifp = &sc->arpcom.ac_if;
170 struct sockaddr_dl *sdl;
180 sc->pages_wanted = -1;
182 device_printf(dev, " ");
185 rev = inw(BASE + REVISION_REG_W);
186 if (chip_ids[(rev >> 4) & 0xF])
187 printf("%s ", chip_ids[(rev >> 4) & 0xF]);
190 i = inw(BASE + CONFIG_REG_W);
191 printf(i & CR_AUI_SELECT ? "AUI" : "UTP");
193 if (sc->pccard_enaddr)
194 for (j = 0; j < 3; j++) {
197 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
198 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
199 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
203 * Read the station address from the chip. The MAC address is bank 1,
207 p = (u_char *) & sc->arpcom.ac_enaddr;
208 for (i = 0; i < 6; i += 2) {
209 address = inw(BASE + IAR_ADDR0_REG_W + i);
210 p[i + 1] = address >> 8;
211 p[i] = address & 0xFF;
213 printf(" MAC address %6D\n", sc->arpcom.ac_enaddr, ":");
215 ifp->if_unit = device_get_unit(dev);
217 ifp->if_mtu = ETHERMTU;
218 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
219 ifp->if_output = ether_output;
220 ifp->if_start = snstart;
221 ifp->if_ioctl = snioctl;
222 ifp->if_watchdog = snwatchdog;
223 ifp->if_init = sninit;
224 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
231 * Fill the hardware address into ifa_addr if we find an AF_LINK
232 * entry. We need to do this so bpf's can get the hardware addr of
233 * this card. netstat likes this too!
235 ifa = TAILQ_FIRST(&ifp->if_addrhead);
236 while ((ifa != 0) && (ifa->ifa_addr != 0) &&
237 (ifa->ifa_addr->sa_family != AF_LINK))
238 ifa = TAILQ_NEXT(ifa, ifa_link);
240 if ((ifa != 0) && (ifa->ifa_addr != 0)) {
241 sdl = (struct sockaddr_dl *) ifa->ifa_addr;
242 sdl->sdl_type = IFT_ETHER;
243 sdl->sdl_alen = ETHER_ADDR_LEN;
245 bcopy(sc->arpcom.ac_enaddr, LLADDR(sdl), ETHER_ADDR_LEN);
248 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
255 * Reset and initialize the chip
260 register struct sn_softc *sc = xsc;
261 register struct ifnet *ifp = &sc->arpcom.ac_if;
269 * This resets the registers mostly to defaults, but doesn't affect
270 * EEPROM. After the reset cycle, we pause briefly for the chip to
274 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
276 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
280 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
283 * Set the control register to automatically release succesfully
284 * transmitted packets (making the best use out of our limited
285 * memory) and to enable the EPH interrupt on certain TX errors.
288 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
289 CTR_CR_ENABLE | CTR_LE_ENABLE));
291 /* Set squelch level to 240mV (default 480mV) */
292 flags = inw(BASE + CONFIG_REG_W);
293 flags |= CR_SET_SQLCH;
294 outw(BASE + CONFIG_REG_W, flags);
297 * Reset the MMU and wait for it to be un-busy.
300 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
301 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
305 * Disable all interrupts
307 outb(BASE + INTR_MASK_REG_B, 0x00);
312 * Set the transmitter control. We want it enabled.
318 * I (GB) have been unlucky getting this to work.
320 flags |= TCR_PAD_ENABLE;
323 outw(BASE + TXMIT_CONTROL_REG_W, flags);
327 * Now, enable interrupts
336 outb(BASE + INTR_MASK_REG_B, mask);
337 sc->intr_mask = mask;
338 sc->pages_wanted = -1;
342 * Mark the interface running but not active.
344 ifp->if_flags |= IFF_RUNNING;
345 ifp->if_flags &= ~IFF_OACTIVE;
348 * Attempt to push out any waiting packets.
357 snstart(struct ifnet *ifp)
359 register struct sn_softc *sc = ifp->if_softc;
361 register struct mbuf *m;
372 if (sc->arpcom.ac_if.if_flags & IFF_OACTIVE) {
376 if (sc->pages_wanted != -1) {
378 printf("sn%d: snstart() while memory allocation pending\n",
385 * Sneak a peek at the next packet
387 m = sc->arpcom.ac_if.if_snd.ifq_head;
393 * Compute the frame length and set pad to give an overall even
394 * number of bytes. Below we assume that the packet length is even.
396 for (len = 0, top = m; m; m = m->m_next)
402 * We drop packets that are too large. Perhaps we should truncate
405 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
406 printf("sn%d: large packet discarded (A)\n", ifp->if_unit);
407 ++sc->arpcom.ac_if.if_oerrors;
408 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
415 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
417 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
418 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
425 * The MMU wants the number of pages to be the number of 256 byte
426 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
427 * include space for the status word, byte count and control bytes in
428 * the allocation request.
430 numPages = (length + 6) >> 8;
434 * Now, try to allocate the memory
437 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
440 * Wait a short amount of time to see if the allocation request
441 * completes. Otherwise, I enable the interrupt and wait for
442 * completion asyncronously.
445 time_out = MEMORY_WAIT_TIME;
447 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
449 } while (--time_out);
454 * No memory now. Oh well, wait until the chip finds memory
455 * later. Remember how many pages we were asking for and
456 * enable the allocation completion interrupt. Also set a
457 * watchdog in case we miss the interrupt. We mark the
458 * interface active since there is no point in attempting an
459 * snstart() until after the memory is available.
461 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
462 outb(BASE + INTR_MASK_REG_B, mask);
463 sc->intr_mask = mask;
465 sc->arpcom.ac_if.if_timer = 1;
466 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
467 sc->pages_wanted = numPages;
473 * The memory allocation completed. Check the results.
475 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
476 if (packet_no & ARR_FAILED) {
477 printf("sn%d: Memory allocation failed\n", ifp->if_unit);
481 * We have a packet number, so tell the card to use it.
483 outb(BASE + PACKET_NUM_REG_B, packet_no);
486 * Point to the beginning of the packet
488 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
491 * Send the packet length (+6 for status, length and control byte)
492 * and the status word (set to zeros)
494 outw(BASE + DATA_REG_W, 0);
495 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
496 outb(BASE + DATA_REG_B, (length + 6) >> 8);
499 * Get the packet from the kernel. This will include the Ethernet
500 * frame header, MAC Addresses etc.
502 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
505 * Push out the data to the card.
507 for (top = m; m != 0; m = m->m_next) {
512 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
515 * Push out remaining byte.
518 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
525 outw(BASE + DATA_REG_W, 0);
529 outb(BASE + DATA_REG_B, 0);
532 * Push out control byte and unused packet byte The control byte is 0
533 * meaning the packet is even lengthed and no special CRC handling is
536 outw(BASE + DATA_REG_W, 0);
539 * Enable the interrupts and let the chipset deal with it Also set a
540 * watchdog in case we miss the interrupt.
542 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
543 outb(BASE + INTR_MASK_REG_B, mask);
544 sc->intr_mask = mask;
546 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
548 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
549 sc->arpcom.ac_if.if_timer = 1;
555 sc->arpcom.ac_if.if_opackets++;
562 * Is another packet coming in? We don't want to overflow the tiny
563 * RX FIFO. If nothing has arrived then attempt to queue another
566 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
575 /* Resume a packet transmit operation after a memory allocation
578 * This is basically a hacked up copy of snstart() which handles
579 * a completed memory allocation the same way snstart() does.
580 * It then passes control to snstart to handle any other queued
584 snresume(struct ifnet *ifp)
586 register struct sn_softc *sc = ifp->if_softc;
588 register struct mbuf *m;
594 u_short pages_wanted;
597 if (sc->pages_wanted < 0)
600 pages_wanted = sc->pages_wanted;
601 sc->pages_wanted = -1;
604 * Sneak a peek at the next packet
606 m = sc->arpcom.ac_if.if_snd.ifq_head;
608 printf("sn%d: snresume() with nothing to send\n", ifp->if_unit);
612 * Compute the frame length and set pad to give an overall even
613 * number of bytes. Below we assume that the packet length is even.
615 for (len = 0, top = m; m; m = m->m_next)
621 * We drop packets that are too large. Perhaps we should truncate
624 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
625 printf("sn%d: large packet discarded (B)\n", ifp->if_unit);
626 ++sc->arpcom.ac_if.if_oerrors;
627 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
634 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
636 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
637 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
645 * The MMU wants the number of pages to be the number of 256 byte
646 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
647 * include space for the status word, byte count and control bytes in
648 * the allocation request.
650 numPages = (length + 6) >> 8;
656 * The memory allocation completed. Check the results. If it failed,
657 * we simply set a watchdog timer and hope for the best.
659 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
660 if (packet_no & ARR_FAILED) {
661 printf("sn%d: Memory allocation failed. Weird.\n", ifp->if_unit);
662 sc->arpcom.ac_if.if_timer = 1;
666 * We have a packet number, so tell the card to use it.
668 outb(BASE + PACKET_NUM_REG_B, packet_no);
671 * Now, numPages should match the pages_wanted recorded when the
672 * memory allocation was initiated.
674 if (pages_wanted != numPages) {
675 printf("sn%d: memory allocation wrong size. Weird.\n", ifp->if_unit);
677 * If the allocation was the wrong size we simply release the
678 * memory once it is granted. Wait for the MMU to be un-busy.
680 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
682 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
687 * Point to the beginning of the packet
689 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
692 * Send the packet length (+6 for status, length and control byte)
693 * and the status word (set to zeros)
695 outw(BASE + DATA_REG_W, 0);
696 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
697 outb(BASE + DATA_REG_B, (length + 6) >> 8);
700 * Get the packet from the kernel. This will include the Ethernet
701 * frame header, MAC Addresses etc.
703 IF_DEQUEUE(&sc->arpcom.ac_if.if_snd, m);
706 * Push out the data to the card.
708 for (top = m; m != 0; m = m->m_next) {
713 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
716 * Push out remaining byte.
719 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
726 outw(BASE + DATA_REG_W, 0);
730 outb(BASE + DATA_REG_B, 0);
733 * Push out control byte and unused packet byte The control byte is 0
734 * meaning the packet is even lengthed and no special CRC handling is
737 outw(BASE + DATA_REG_W, 0);
740 * Enable the interrupts and let the chipset deal with it Also set a
741 * watchdog in case we miss the interrupt.
743 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
744 outb(BASE + INTR_MASK_REG_B, mask);
745 sc->intr_mask = mask;
746 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
752 sc->arpcom.ac_if.if_opackets++;
758 * Now pass control to snstart() to queue any additional packets
760 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
764 * We've sent something, so we're active. Set a watchdog in case the
765 * TX_EMPTY interrupt is lost.
767 sc->arpcom.ac_if.if_flags |= IFF_OACTIVE;
768 sc->arpcom.ac_if.if_timer = 1;
777 int status, interrupts;
778 register struct sn_softc *sc = (struct sn_softc *) arg;
779 struct ifnet *ifp = &sc->arpcom.ac_if;
783 * Chip state registers
791 * if_ep.c did this, so I do too. Yet if_ed.c doesn't. I wonder...
796 * Clear the watchdog.
803 * Obtain the current interrupt mask and clear the hardware mask
804 * while servicing interrupts.
806 mask = inb(BASE + INTR_MASK_REG_B);
807 outb(BASE + INTR_MASK_REG_B, 0x00);
810 * Get the set of interrupts which occurred and eliminate any which
813 interrupts = inb(BASE + INTR_STAT_REG_B);
814 status = interrupts & mask;
817 * Now, process each of the interrupt types.
823 if (status & IM_RX_OVRN_INT) {
826 * Acknowlege Interrupt
829 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
831 ++sc->arpcom.ac_if.if_ierrors;
836 if (status & IM_RCV_INT) {
841 packet_number = inw(BASE + FIFO_PORTS_REG_W);
843 if (packet_number & FIFO_REMPTY) {
846 * we got called , but nothing was on the FIFO
848 printf("sn: Receive interrupt with nothing on FIFO\n");
856 * An on-card memory allocation came through.
858 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) {
874 * Acknowlege Interrupt
877 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
879 packet_no = inw(BASE + FIFO_PORTS_REG_W);
880 packet_no &= FIFO_TX_MASK;
883 * select this as the packet to read from
885 outb(BASE + PACKET_NUM_REG_B, packet_no);
888 * Position the pointer to the first word from this packet
890 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
893 * Fetch the TX status word. The value found here will be a
894 * copy of the EPH_STATUS_REG_W at the time the transmit
897 tx_status = inw(BASE + DATA_REG_W);
899 if (tx_status & EPHSR_TX_SUC) {
900 device_printf(sc->dev,
901 "Successful packet caused interrupt\n");
903 ++sc->arpcom.ac_if.if_oerrors;
906 if (tx_status & EPHSR_LATCOL)
907 ++sc->arpcom.ac_if.if_collisions;
910 * Some of these errors will have disabled transmit.
911 * Re-enable transmit now.
916 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
918 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
922 * kill the failed packet. Wait for the MMU to be un-busy.
925 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
927 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
930 * Attempt to queue more transmits.
932 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
933 snstart(&sc->arpcom.ac_if);
936 * Transmit underrun. We use this opportunity to update transmit
937 * statistics from the card.
939 if (status & IM_TX_EMPTY_INT) {
942 * Acknowlege Interrupt
945 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
948 * Disable this interrupt.
950 mask &= ~IM_TX_EMPTY_INT;
953 card_stats = inw(BASE + COUNTER_REG_W);
958 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
961 * Multiple collisions
963 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
968 * Attempt to enqueue some more stuff.
970 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
971 snstart(&sc->arpcom.ac_if);
974 * Some other error. Try to fix it by resetting the adapter.
976 if (status & IM_EPH_INT) {
983 * Handled all interrupt sources.
989 * Reestablish interrupts from mask which have not been deselected
990 * during this interrupt. Note that the hardware mask, which was set
991 * to 0x00 at the start of this service routine, may have been
992 * updated by one or more of the interrupt handers and we must let
993 * those new interrupts stay enabled here.
995 mask |= inb(BASE + INTR_MASK_REG_B);
996 outb(BASE + INTR_MASK_REG_B, mask);
997 sc->intr_mask = mask;
1003 snread(register struct ifnet *ifp)
1005 struct sn_softc *sc = ifp->if_softc;
1006 struct ether_header *eh;
1010 u_short packet_length;
1015 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1017 if (packet_number & FIFO_REMPTY) {
1020 * we got called , but nothing was on the FIFO
1022 printf("sn: Receive interrupt with nothing on FIFO\n");
1029 * Start reading from the start of the packet. Since PTR_RCV is set,
1030 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
1032 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
1035 * First two words are status and packet_length
1037 status = inw(BASE + DATA_REG_W);
1038 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
1041 * The packet length contains 3 extra words: status, length, and a
1042 * extra word with the control byte.
1047 * Account for receive errors and discard.
1049 if (status & RS_ERRORS) {
1050 ++sc->arpcom.ac_if.if_ierrors;
1054 * A packet is received.
1058 * Adjust for odd-length packet.
1060 if (status & RS_ODDFRAME)
1064 * Allocate a header mbuf from the kernel.
1066 MGETHDR(m, M_DONTWAIT, MT_DATA);
1070 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1071 m->m_pkthdr.len = m->m_len = packet_length;
1074 * Attach an mbuf cluster
1076 MCLGET(m, M_DONTWAIT);
1079 * Insist on getting a cluster
1081 if ((m->m_flags & M_EXT) == 0) {
1083 ++sc->arpcom.ac_if.if_ierrors;
1084 printf("sn: snread() kernel memory allocation problem\n");
1087 eh = mtod(m, struct ether_header *);
1090 * Get packet, including link layer address, from interface.
1093 data = (u_char *) eh;
1094 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1095 if (packet_length & 1) {
1096 data += packet_length & ~1;
1097 *data = inb(BASE + DATA_REG_B);
1099 ++sc->arpcom.ac_if.if_ipackets;
1101 if (sc->arpcom.ac_if.if_bpf)
1103 bpf_mtap(&sc->arpcom.ac_if, m);
1106 * Note that the interface cannot be in promiscuous mode if
1107 * there are no BPF listeners. And if we are in promiscuous
1108 * mode, we have to check if this packet is really ours.
1110 if ((sc->arpcom.ac_if.if_flags & IFF_PROMISC) &&
1111 (eh->ether_dhost[0] & 1) == 0 &&
1112 bcmp(eh->ether_dhost, sc->arpcom.ac_enaddr,
1113 sizeof(eh->ether_dhost)) != 0 &&
1114 bcmp(eh->ether_dhost, etherbroadcastaddr,
1115 sizeof(eh->ether_dhost)) != 0) {
1122 * Remove link layer addresses and whatnot.
1124 m->m_pkthdr.len = m->m_len = packet_length - sizeof(struct ether_header);
1125 m->m_data += sizeof(struct ether_header);
1127 ether_input(&sc->arpcom.ac_if, eh, m);
1132 * Error or good, tell the card to get rid of this packet Wait for
1133 * the MMU to be un-busy.
1136 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1138 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1141 * Check whether another packet is ready
1143 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1144 if (packet_number & FIFO_REMPTY) {
1152 * Handle IOCTLS. This function is completely stolen from if_ep.c
1153 * As with its progenitor, it does not handle hardware address
1157 snioctl(register struct ifnet *ifp, u_long cmd, caddr_t data)
1159 struct sn_softc *sc = ifp->if_softc;
1168 error = ether_ioctl(ifp, cmd, data);
1172 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1173 ifp->if_flags &= ~IFF_RUNNING;
1177 /* reinitialize card on any parameter change */
1185 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1186 sizeof(sc->sc_addr));
1191 /* update multicast filter list. */
1196 /* update multicast filter list. */
1210 snreset(struct sn_softc *sc)
1222 snwatchdog(struct ifnet *ifp)
1226 sn_intr(ifp->if_softc);
1231 /* 1. zero the interrupt mask
1232 * 2. clear the enable receive flag
1233 * 3. clear the enable xmit flags
1236 snstop(struct sn_softc *sc)
1239 struct ifnet *ifp = &sc->arpcom.ac_if;
1242 * Clear interrupt mask; disable all interrupts.
1245 outb(BASE + INTR_MASK_REG_B, 0x00);
1248 * Disable transmitter and Receiver
1251 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1252 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1262 sn_activate(device_t dev)
1264 struct sn_softc *sc = device_get_softc(dev);
1268 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1269 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1270 if (!sc->port_res) {
1272 device_printf(dev, "Cannot allocate ioport\n");
1278 sc->irq_res = bus_alloc_resource(dev, SYS_RES_IRQ, &sc->irq_rid,
1279 0, ~0, 1, RF_ACTIVE);
1282 device_printf(dev, "Cannot allocate irq\n");
1287 if ((err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, sn_intr, sc,
1288 &sc->intrhand)) != 0) {
1293 sc->sn_io_addr = rman_get_start(sc->port_res);
1298 sn_deactivate(device_t dev)
1300 struct sn_softc *sc = device_get_softc(dev);
1303 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
1306 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1310 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1317 * Function: sn_probe( device_t dev, int pccard )
1320 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1321 * Tries to cause as little damage as possible if it's not a SMC chip.
1322 * Returns a 0 on success
1325 * (1) see if the high byte of BANK_SELECT is 0x33
1326 * (2) compare the ioaddr with the base register's address
1327 * (3) see if I recognize the chip ID in the appropriate register
1332 sn_probe(device_t dev, int pccard)
1334 struct sn_softc *sc = device_get_softc(dev);
1336 u_short revision_register;
1337 u_short base_address_register;
1341 if ((err = sn_activate(dev)) != 0)
1344 ioaddr = sc->sn_io_addr;
1347 * First, see if the high byte is 0x33
1349 bank = inw(ioaddr + BANK_SELECT_REG_W);
1350 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1352 device_printf(dev, "test1 failed\n");
1357 * The above MIGHT indicate a device, but I need to write to further
1358 * test this. Go to bank 0, then test that the register still
1359 * reports the high byte is 0x33.
1361 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1362 bank = inw(ioaddr + BANK_SELECT_REG_W);
1363 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1365 device_printf(dev, "test2 failed\n");
1370 * well, we've already written once, so hopefully another time won't
1371 * hurt. This time, I need to switch the bank register to bank 1, so
1372 * I can access the base address register. The contents of the
1373 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1374 * to match the I/O port address where the adapter is being probed.
1376 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1377 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1380 * This test is nonsence on PC-card architecture, so if
1381 * pccard == 1, skip this test. (hosokawa)
1383 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1386 * Well, the base address register didn't match. Must not
1387 * have been a SMC chip after all.
1390 * printf("sn: ioaddr %x doesn't match card configuration
1391 * (%x)\n", ioaddr, base_address_register >> 3 & 0x3E0 );
1395 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1396 "base_address_register = 0x%x\n", ioaddr,
1397 base_address_register >> 3 & 0x3E0);
1402 * Check if the revision register is something that I recognize.
1403 * These might need to be added to later, as future revisions could
1406 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1407 revision_register = inw(ioaddr + REVISION_REG_W);
1408 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1411 * I don't regonize this chip, so...
1414 device_printf(dev, "test4 failed\n");
1419 * at this point I'll assume that the chip is an SMC9xxx. It might be
1420 * prudent to check a listing of MAC addresses against the hardware
1421 * address, or do some other tests.
1433 sn_setmcast(struct sn_softc *sc)
1435 struct ifnet *ifp = (struct ifnet *)sc;
1439 * Set the receiver filter. We want receive enabled and auto strip
1440 * of CRC from received packet. If we are promiscuous then set that
1443 flags = RCR_ENABLE | RCR_STRIP_CRC;
1445 if (ifp->if_flags & IFF_PROMISC) {
1446 flags |= RCR_PROMISC | RCR_ALMUL;
1447 } else if (ifp->if_flags & IFF_ALLMULTI) {
1451 if (sn_getmcf(&sc->arpcom, mcf)) {
1454 outw(BASE + MULTICAST1_REG_W,
1455 ((u_short)mcf[1] << 8) | mcf[0]);
1456 outw(BASE + MULTICAST2_REG_W,
1457 ((u_short)mcf[3] << 8) | mcf[2]);
1458 outw(BASE + MULTICAST3_REG_W,
1459 ((u_short)mcf[5] << 8) | mcf[4]);
1460 outw(BASE + MULTICAST4_REG_W,
1461 ((u_short)mcf[7] << 8) | mcf[6]);
1467 outw(BASE + RECV_CONTROL_REG_W, flags);
1471 sn_getmcf(struct arpcom *ac, u_char *mcf)
1474 register u_int index, index2;
1475 register u_char *af = (u_char *) mcf;
1476 struct ifmultiaddr *ifma;
1480 for (ifma = ac->ac_if.if_multiaddrs.lh_first; ifma;
1481 ifma = ifma->ifma_link.le_next) {
1482 if (ifma->ifma_addr->sa_family != AF_LINK)
1484 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1486 for (i = 0; i < 6; i++) {
1488 index2 |= (index & 0x01);
1491 af[index2 >> 3] |= 1 << (index2 & 7);
1493 return 1; /* use multicast filter */
1501 const u_int poly = 0xedb88320;
1502 u_int v = 0xffffffff;
1505 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1507 for (perBit = 0; perBit < 8; perBit++) {
1508 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);