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 1.27 2006/12/22 23:26:22 swildner 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/module.h>
98 #include <sys/thread2.h>
100 #include <net/ethernet.h>
102 #include <net/ifq_var.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 "if_snreg.h"
126 #include "if_snvar.h"
128 /* Exported variables */
129 devclass_t sn_devclass;
131 static int snioctl(struct ifnet * ifp, u_long, caddr_t, struct ucred *);
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 DECLARE_DUMMY_MODULE(if_sn);
148 /* I (GB) have been unlucky getting the hardware padding
153 static const char *chip_ids[15] = {
155 /* 3 */ "SMC91C90/91C92",
160 /* 8 */ "SMC91C100FD",
166 sn_attach(device_t dev)
168 struct sn_softc *sc = device_get_softc(dev);
169 struct ifnet *ifp = &sc->arpcom.ac_if;
182 sc->pages_wanted = -1;
184 device_printf(dev, " ");
187 rev = inw(BASE + REVISION_REG_W);
188 if (chip_ids[(rev >> 4) & 0xF])
189 kprintf("%s ", chip_ids[(rev >> 4) & 0xF]);
192 i = inw(BASE + CONFIG_REG_W);
193 kprintf("%s\n", i & CR_AUI_SELECT ? "AUI" : "UTP");
195 if (sc->pccard_enaddr)
196 for (j = 0; j < 3; j++) {
199 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
200 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
201 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
205 * Read the station address from the chip. The MAC address is bank 1,
209 p = (u_char *) & sc->arpcom.ac_enaddr;
210 for (i = 0; i < 6; i += 2) {
211 address = inw(BASE + IAR_ADDR0_REG_W + i);
212 p[i + 1] = address >> 8;
213 p[i] = address & 0xFF;
216 if_initname(ifp, "sn", device_get_unit(dev));
217 ifp->if_mtu = ETHERMTU;
218 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
219 ifp->if_start = snstart;
220 ifp->if_ioctl = snioctl;
221 ifp->if_watchdog = snwatchdog;
222 ifp->if_init = sninit;
223 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
224 ifq_set_ready(&ifp->if_snd);
227 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
229 error = bus_setup_intr(dev, sc->irq_res, INTR_NETSAFE,
230 sn_intr, sc, &sc->intrhand,
243 * Reset and initialize the chip
248 struct sn_softc *sc = xsc;
249 struct ifnet *ifp = &sc->arpcom.ac_if;
254 * This resets the registers mostly to defaults, but doesn't affect
255 * EEPROM. After the reset cycle, we pause briefly for the chip to
259 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
261 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
265 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
268 * Set the control register to automatically release succesfully
269 * transmitted packets (making the best use out of our limited
270 * memory) and to enable the EPH interrupt on certain TX errors.
273 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
274 CTR_CR_ENABLE | CTR_LE_ENABLE));
276 /* Set squelch level to 240mV (default 480mV) */
277 flags = inw(BASE + CONFIG_REG_W);
278 flags |= CR_SET_SQLCH;
279 outw(BASE + CONFIG_REG_W, flags);
282 * Reset the MMU and wait for it to be un-busy.
285 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
286 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
290 * Disable all interrupts
292 outb(BASE + INTR_MASK_REG_B, 0x00);
297 * Set the transmitter control. We want it enabled.
303 * I (GB) have been unlucky getting this to work.
305 flags |= TCR_PAD_ENABLE;
308 outw(BASE + TXMIT_CONTROL_REG_W, flags);
312 * Now, enable interrupts
321 outb(BASE + INTR_MASK_REG_B, mask);
322 sc->intr_mask = mask;
323 sc->pages_wanted = -1;
327 * Mark the interface running but not active.
329 ifp->if_flags |= IFF_RUNNING;
330 ifp->if_flags &= ~IFF_OACTIVE;
333 * Attempt to push out any waiting packets.
340 snstart(struct ifnet *ifp)
342 struct sn_softc *sc = ifp->if_softc;
353 if (ifp->if_flags & IFF_OACTIVE) {
356 if (sc->pages_wanted != -1) {
357 kprintf("%s: snstart() while memory allocation pending\n",
364 * Sneak a peek at the next packet
366 m = ifq_poll(&ifp->if_snd);
371 * Compute the frame length and set pad to give an overall even
372 * number of bytes. Below we assume that the packet length is even.
374 for (len = 0, top = m; m; m = m->m_next)
380 * We drop packets that are too large. Perhaps we should truncate
383 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
384 kprintf("%s: large packet discarded (A)\n", ifp->if_xname);
385 ++sc->arpcom.ac_if.if_oerrors;
386 ifq_dequeue(&ifp->if_snd, m);
393 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
395 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
396 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
403 * The MMU wants the number of pages to be the number of 256 byte
404 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
405 * include space for the status word, byte count and control bytes in
406 * the allocation request.
408 numPages = (length + 6) >> 8;
412 * Now, try to allocate the memory
415 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
418 * Wait a short amount of time to see if the allocation request
419 * completes. Otherwise, I enable the interrupt and wait for
420 * completion asyncronously.
423 time_out = MEMORY_WAIT_TIME;
425 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
427 } while (--time_out);
432 * No memory now. Oh well, wait until the chip finds memory
433 * later. Remember how many pages we were asking for and
434 * enable the allocation completion interrupt. Also set a
435 * watchdog in case we miss the interrupt. We mark the
436 * interface active since there is no point in attempting an
437 * snstart() until after the memory is available.
439 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
440 outb(BASE + INTR_MASK_REG_B, mask);
441 sc->intr_mask = mask;
444 ifp->if_flags |= IFF_OACTIVE;
445 sc->pages_wanted = numPages;
450 * The memory allocation completed. Check the results.
452 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
453 if (packet_no & ARR_FAILED) {
454 kprintf("%s: Memory allocation failed\n", ifp->if_xname);
458 * We have a packet number, so tell the card to use it.
460 outb(BASE + PACKET_NUM_REG_B, packet_no);
463 * Point to the beginning of the packet
465 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
468 * Send the packet length (+6 for status, length and control byte)
469 * and the status word (set to zeros)
471 outw(BASE + DATA_REG_W, 0);
472 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
473 outb(BASE + DATA_REG_B, (length + 6) >> 8);
476 * Get the packet from the kernel. This will include the Ethernet
477 * frame header, MAC Addresses etc.
479 ifq_dequeue(&ifp->if_snd, m);
482 * Push out the data to the card.
484 for (top = m; m != 0; m = m->m_next) {
489 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
492 * Push out remaining byte.
495 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
502 outw(BASE + DATA_REG_W, 0);
506 outb(BASE + DATA_REG_B, 0);
509 * Push out control byte and unused packet byte The control byte is 0
510 * meaning the packet is even lengthed and no special CRC handling is
513 outw(BASE + DATA_REG_W, 0);
516 * Enable the interrupts and let the chipset deal with it Also set a
517 * watchdog in case we miss the interrupt.
519 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
520 outb(BASE + INTR_MASK_REG_B, mask);
521 sc->intr_mask = mask;
523 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
525 ifp->if_flags |= IFF_OACTIVE;
536 * Is another packet coming in? We don't want to overflow the tiny
537 * RX FIFO. If nothing has arrived then attempt to queue another
540 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
546 /* Resume a packet transmit operation after a memory allocation
549 * This is basically a hacked up copy of snstart() which handles
550 * a completed memory allocation the same way snstart() does.
551 * It then passes control to snstart to handle any other queued
555 snresume(struct ifnet *ifp)
557 struct sn_softc *sc = ifp->if_softc;
565 u_short pages_wanted;
568 if (sc->pages_wanted < 0)
571 pages_wanted = sc->pages_wanted;
572 sc->pages_wanted = -1;
575 * Sneak a peek at the next packet
577 m = ifq_poll(&ifp->if_snd);
579 kprintf("%s: snresume() with nothing to send\n", ifp->if_xname);
583 * Compute the frame length and set pad to give an overall even
584 * number of bytes. Below we assume that the packet length is even.
586 for (len = 0, top = m; m; m = m->m_next)
592 * We drop packets that are too large. Perhaps we should truncate
595 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
596 kprintf("%s: large packet discarded (B)\n", ifp->if_xname);
598 ifq_dequeue(&ifp->if_snd, m);
605 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
607 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
608 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
616 * The MMU wants the number of pages to be the number of 256 byte
617 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
618 * include space for the status word, byte count and control bytes in
619 * the allocation request.
621 numPages = (length + 6) >> 8;
627 * The memory allocation completed. Check the results. If it failed,
628 * we simply set a watchdog timer and hope for the best.
630 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
631 if (packet_no & ARR_FAILED) {
632 kprintf("%s: Memory allocation failed. Weird.\n", ifp->if_xname);
637 * We have a packet number, so tell the card to use it.
639 outb(BASE + PACKET_NUM_REG_B, packet_no);
642 * Now, numPages should match the pages_wanted recorded when the
643 * memory allocation was initiated.
645 if (pages_wanted != numPages) {
646 kprintf("%s: memory allocation wrong size. Weird.\n", ifp->if_xname);
648 * If the allocation was the wrong size we simply release the
649 * memory once it is granted. Wait for the MMU to be un-busy.
651 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
653 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
658 * Point to the beginning of the packet
660 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
663 * Send the packet length (+6 for status, length and control byte)
664 * and the status word (set to zeros)
666 outw(BASE + DATA_REG_W, 0);
667 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
668 outb(BASE + DATA_REG_B, (length + 6) >> 8);
671 * Get the packet from the kernel. This will include the Ethernet
672 * frame header, MAC Addresses etc.
674 ifq_dequeue(&ifp->if_snd, m);
677 * Push out the data to the card.
679 for (top = m; m != 0; m = m->m_next) {
684 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
687 * Push out remaining byte.
690 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
697 outw(BASE + DATA_REG_W, 0);
701 outb(BASE + DATA_REG_B, 0);
704 * Push out control byte and unused packet byte The control byte is 0
705 * meaning the packet is even lengthed and no special CRC handling is
708 outw(BASE + DATA_REG_W, 0);
711 * Enable the interrupts and let the chipset deal with it Also set a
712 * watchdog in case we miss the interrupt.
714 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
715 outb(BASE + INTR_MASK_REG_B, mask);
716 sc->intr_mask = mask;
717 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
727 * Now pass control to snstart() to queue any additional packets
729 ifp->if_flags &= ~IFF_OACTIVE;
733 * We've sent something, so we're active. Set a watchdog in case the
734 * TX_EMPTY interrupt is lost.
736 ifp->if_flags |= IFF_OACTIVE;
744 int status, interrupts;
745 struct sn_softc *sc = (struct sn_softc *) arg;
746 struct ifnet *ifp = &sc->arpcom.ac_if;
749 * Chip state registers
757 * Clear the watchdog.
764 * Obtain the current interrupt mask and clear the hardware mask
765 * while servicing interrupts.
767 mask = inb(BASE + INTR_MASK_REG_B);
768 outb(BASE + INTR_MASK_REG_B, 0x00);
771 * Get the set of interrupts which occurred and eliminate any which
774 interrupts = inb(BASE + INTR_STAT_REG_B);
775 status = interrupts & mask;
778 * Now, process each of the interrupt types.
784 if (status & IM_RX_OVRN_INT) {
787 * Acknowlege Interrupt
790 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
792 ++sc->arpcom.ac_if.if_ierrors;
797 if (status & IM_RCV_INT) {
802 packet_number = inw(BASE + FIFO_PORTS_REG_W);
804 if (packet_number & FIFO_REMPTY) {
807 * we got called , but nothing was on the FIFO
809 kprintf("sn: Receive interrupt with nothing on FIFO\n");
817 * An on-card memory allocation came through.
819 if (status & IM_ALLOC_INT) {
822 * Disable this interrupt.
824 mask &= ~IM_ALLOC_INT;
825 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
826 snresume(&sc->arpcom.ac_if);
829 * TX Completion. Handle a transmit error message. This will only be
830 * called when there is an error, because of the AUTO_RELEASE mode.
832 if (status & IM_TX_INT) {
835 * Acknowlege Interrupt
838 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
840 packet_no = inw(BASE + FIFO_PORTS_REG_W);
841 packet_no &= FIFO_TX_MASK;
844 * select this as the packet to read from
846 outb(BASE + PACKET_NUM_REG_B, packet_no);
849 * Position the pointer to the first word from this packet
851 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
854 * Fetch the TX status word. The value found here will be a
855 * copy of the EPH_STATUS_REG_W at the time the transmit
858 tx_status = inw(BASE + DATA_REG_W);
860 if (tx_status & EPHSR_TX_SUC) {
861 device_printf(sc->dev,
862 "Successful packet caused interrupt\n");
864 ++sc->arpcom.ac_if.if_oerrors;
867 if (tx_status & EPHSR_LATCOL)
868 ++sc->arpcom.ac_if.if_collisions;
871 * Some of these errors will have disabled transmit.
872 * Re-enable transmit now.
877 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
879 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
883 * kill the failed packet. Wait for the MMU to be un-busy.
886 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
888 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
891 * Attempt to queue more transmits.
893 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
894 snstart(&sc->arpcom.ac_if);
897 * Transmit underrun. We use this opportunity to update transmit
898 * statistics from the card.
900 if (status & IM_TX_EMPTY_INT) {
903 * Acknowlege Interrupt
906 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
909 * Disable this interrupt.
911 mask &= ~IM_TX_EMPTY_INT;
914 card_stats = inw(BASE + COUNTER_REG_W);
919 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
922 * Multiple collisions
924 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
929 * Attempt to enqueue some more stuff.
931 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
932 snstart(&sc->arpcom.ac_if);
935 * Some other error. Try to fix it by resetting the adapter.
937 if (status & IM_EPH_INT) {
944 * Handled all interrupt sources.
950 * Reestablish interrupts from mask which have not been deselected
951 * during this interrupt. Note that the hardware mask, which was set
952 * to 0x00 at the start of this service routine, may have been
953 * updated by one or more of the interrupt handers and we must let
954 * those new interrupts stay enabled here.
956 mask |= inb(BASE + INTR_MASK_REG_B);
957 outb(BASE + INTR_MASK_REG_B, mask);
958 sc->intr_mask = mask;
962 snread(struct ifnet *ifp)
964 struct sn_softc *sc = ifp->if_softc;
968 u_short packet_length;
973 packet_number = inw(BASE + FIFO_PORTS_REG_W);
975 if (packet_number & FIFO_REMPTY) {
978 * we got called , but nothing was on the FIFO
980 kprintf("sn: Receive interrupt with nothing on FIFO\n");
987 * Start reading from the start of the packet. Since PTR_RCV is set,
988 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
990 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
993 * First two words are status and packet_length
995 status = inw(BASE + DATA_REG_W);
996 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
999 * The packet length contains 3 extra words: status, length, and a
1000 * extra word with the control byte.
1005 * Account for receive errors and discard.
1007 if (status & RS_ERRORS) {
1012 * A packet is received.
1016 * Adjust for odd-length packet.
1018 if (status & RS_ODDFRAME)
1022 * Allocate a header mbuf from the kernel.
1024 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1028 m->m_pkthdr.rcvif = ifp;
1029 m->m_pkthdr.len = m->m_len = packet_length;
1032 * Attach an mbuf cluster
1034 MCLGET(m, MB_DONTWAIT);
1037 * Insist on getting a cluster
1039 if ((m->m_flags & M_EXT) == 0) {
1042 kprintf("sn: snread() kernel memory allocation problem\n");
1047 * Get packet, including link layer address, from interface.
1050 data = mtod(m, u_char *);
1051 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1052 if (packet_length & 1) {
1053 data += packet_length & ~1;
1054 *data = inb(BASE + DATA_REG_B);
1058 m->m_pkthdr.len = m->m_len = packet_length;
1060 ifp->if_input(ifp, m);
1065 * Error or good, tell the card to get rid of this packet Wait for
1066 * the MMU to be un-busy.
1069 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1071 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1074 * Check whether another packet is ready
1076 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1077 if (packet_number & FIFO_REMPTY) {
1085 * Handle IOCTLS. This function is completely stolen from if_ep.c
1086 * As with its progenitor, it does not handle hardware address
1090 snioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1092 struct sn_softc *sc = ifp->if_softc;
1097 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1098 ifp->if_flags &= ~IFF_RUNNING;
1102 /* reinitialize card on any parameter change */
1110 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1111 sizeof(sc->sc_addr));
1116 /* update multicast filter list. */
1121 /* update multicast filter list. */
1126 error = ether_ioctl(ifp, cmd, data);
1134 snreset(struct sn_softc *sc)
1141 snwatchdog(struct ifnet *ifp)
1143 sn_intr(ifp->if_softc);
1147 /* 1. zero the interrupt mask
1148 * 2. clear the enable receive flag
1149 * 3. clear the enable xmit flags
1152 snstop(struct sn_softc *sc)
1155 struct ifnet *ifp = &sc->arpcom.ac_if;
1158 * Clear interrupt mask; disable all interrupts.
1161 outb(BASE + INTR_MASK_REG_B, 0x00);
1164 * Disable transmitter and Receiver
1167 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1168 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1178 sn_activate(device_t dev)
1180 struct sn_softc *sc = device_get_softc(dev);
1183 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1184 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1185 if (!sc->port_res) {
1187 device_printf(dev, "Cannot allocate ioport\n");
1193 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
1197 device_printf(dev, "Cannot allocate irq\n");
1203 sc->sn_io_addr = rman_get_start(sc->port_res);
1208 sn_deactivate(device_t dev)
1210 struct sn_softc *sc = device_get_softc(dev);
1213 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1217 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1224 * Function: sn_probe( device_t dev, int pccard )
1227 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1228 * Tries to cause as little damage as possible if it's not a SMC chip.
1229 * Returns a 0 on success
1232 * (1) see if the high byte of BANK_SELECT is 0x33
1233 * (2) compare the ioaddr with the base register's address
1234 * (3) see if I recognize the chip ID in the appropriate register
1239 sn_probe(device_t dev, int pccard)
1241 struct sn_softc *sc = device_get_softc(dev);
1243 u_short revision_register;
1244 u_short base_address_register;
1248 if ((err = sn_activate(dev)) != 0)
1251 ioaddr = sc->sn_io_addr;
1254 * First, see if the high byte is 0x33
1256 bank = inw(ioaddr + BANK_SELECT_REG_W);
1257 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1259 device_printf(dev, "test1 failed\n");
1264 * The above MIGHT indicate a device, but I need to write to further
1265 * test this. Go to bank 0, then test that the register still
1266 * reports the high byte is 0x33.
1268 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1269 bank = inw(ioaddr + BANK_SELECT_REG_W);
1270 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1272 device_printf(dev, "test2 failed\n");
1277 * well, we've already written once, so hopefully another time won't
1278 * hurt. This time, I need to switch the bank register to bank 1, so
1279 * I can access the base address register. The contents of the
1280 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1281 * to match the I/O port address where the adapter is being probed.
1283 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1284 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1287 * This test is nonsence on PC-card architecture, so if
1288 * pccard == 1, skip this test. (hosokawa)
1290 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1293 * Well, the base address register didn't match. Must not
1294 * have been a SMC chip after all.
1297 * kprintf("sn: ioaddr %x doesn't match card configuration
1298 * (%x)\n", ioaddr, base_address_register >> 3 & 0x3E0 );
1302 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1303 "base_address_register = 0x%x\n", ioaddr,
1304 base_address_register >> 3 & 0x3E0);
1309 * Check if the revision register is something that I recognize.
1310 * These might need to be added to later, as future revisions could
1313 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1314 revision_register = inw(ioaddr + REVISION_REG_W);
1315 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1318 * I don't regonize this chip, so...
1321 device_printf(dev, "test4 failed\n");
1326 * at this point I'll assume that the chip is an SMC9xxx. It might be
1327 * prudent to check a listing of MAC addresses against the hardware
1328 * address, or do some other tests.
1340 sn_setmcast(struct sn_softc *sc)
1342 struct ifnet *ifp = (struct ifnet *)sc;
1346 * Set the receiver filter. We want receive enabled and auto strip
1347 * of CRC from received packet. If we are promiscuous then set that
1350 flags = RCR_ENABLE | RCR_STRIP_CRC;
1352 if (ifp->if_flags & IFF_PROMISC) {
1353 flags |= RCR_PROMISC | RCR_ALMUL;
1354 } else if (ifp->if_flags & IFF_ALLMULTI) {
1358 if (sn_getmcf(&sc->arpcom, mcf)) {
1361 outw(BASE + MULTICAST1_REG_W,
1362 ((u_short)mcf[1] << 8) | mcf[0]);
1363 outw(BASE + MULTICAST2_REG_W,
1364 ((u_short)mcf[3] << 8) | mcf[2]);
1365 outw(BASE + MULTICAST3_REG_W,
1366 ((u_short)mcf[5] << 8) | mcf[4]);
1367 outw(BASE + MULTICAST4_REG_W,
1368 ((u_short)mcf[7] << 8) | mcf[6]);
1374 outw(BASE + RECV_CONTROL_REG_W, flags);
1378 sn_getmcf(struct arpcom *ac, u_char *mcf)
1381 u_int index, index2;
1382 u_char *af = (u_char *) mcf;
1383 struct ifmultiaddr *ifma;
1387 LIST_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) {
1388 if (ifma->ifma_addr->sa_family != AF_LINK)
1390 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1392 for (i = 0; i < 6; i++) {
1394 index2 |= (index & 0x01);
1397 af[index2 >> 3] |= 1 << (index2 & 7);
1399 return 1; /* use multicast filter */
1407 const u_int poly = 0xedb88320;
1408 u_int v = 0xffffffff;
1411 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1413 for (perBit = 0; perBit < 8; perBit++) {
1414 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);