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 1.21 2005/06/20 15:10:41 joerg 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/thread2.h>
96 #include <sys/module.h>
99 #include <machine/bus.h>
100 #include <machine/resource.h>
101 #include <sys/rman.h>
103 #include <net/ethernet.h>
105 #include <net/ifq_var.h>
106 #include <net/if_arp.h>
107 #include <net/if_dl.h>
108 #include <net/if_types.h>
109 #include <net/if_mib.h>
112 #include <netinet/in.h>
113 #include <netinet/in_systm.h>
114 #include <netinet/in_var.h>
115 #include <netinet/ip.h>
119 #include <netns/ns.h>
120 #include <netns/ns_if.h>
124 #include <net/bpfdesc.h>
126 #include <machine/clock.h>
128 #include "if_snreg.h"
129 #include "if_snvar.h"
131 /* Exported variables */
132 devclass_t sn_devclass;
134 static int snioctl(struct ifnet * ifp, u_long, caddr_t, struct ucred *);
136 static void snresume(struct ifnet *);
139 void snread(struct ifnet *);
140 void snreset(struct sn_softc *);
141 void snstart(struct ifnet *);
142 void snstop(struct sn_softc *);
143 void snwatchdog(struct ifnet *);
145 static void sn_setmcast(struct sn_softc *);
146 static int sn_getmcf(struct arpcom *ac, u_char *mcf);
147 static u_int smc_crc(u_char *);
149 DECLARE_DUMMY_MODULE(if_sn);
151 /* I (GB) have been unlucky getting the hardware padding
156 static const char *chip_ids[15] = {
158 /* 3 */ "SMC91C90/91C92",
163 /* 8 */ "SMC91C100FD",
169 sn_attach(device_t dev)
171 struct sn_softc *sc = device_get_softc(dev);
172 struct ifnet *ifp = &sc->arpcom.ac_if;
184 sc->pages_wanted = -1;
186 device_printf(dev, " ");
189 rev = inw(BASE + REVISION_REG_W);
190 if (chip_ids[(rev >> 4) & 0xF])
191 printf("%s ", chip_ids[(rev >> 4) & 0xF]);
194 i = inw(BASE + CONFIG_REG_W);
195 printf("%s\n", i & CR_AUI_SELECT ? "AUI" : "UTP");
197 if (sc->pccard_enaddr)
198 for (j = 0; j < 3; j++) {
201 w = (u_short)sc->arpcom.ac_enaddr[j * 2] |
202 (((u_short)sc->arpcom.ac_enaddr[j * 2 + 1]) << 8);
203 outw(BASE + IAR_ADDR0_REG_W + j * 2, w);
207 * Read the station address from the chip. The MAC address is bank 1,
211 p = (u_char *) & sc->arpcom.ac_enaddr;
212 for (i = 0; i < 6; i += 2) {
213 address = inw(BASE + IAR_ADDR0_REG_W + i);
214 p[i + 1] = address >> 8;
215 p[i] = address & 0xFF;
218 if_initname(ifp, "sn", device_get_unit(dev));
219 ifp->if_mtu = ETHERMTU;
220 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
221 ifp->if_start = snstart;
222 ifp->if_ioctl = snioctl;
223 ifp->if_watchdog = snwatchdog;
224 ifp->if_init = sninit;
225 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
226 ifq_set_ready(&ifp->if_snd);
229 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
236 * Reset and initialize the chip
241 struct sn_softc *sc = xsc;
242 struct ifnet *ifp = &sc->arpcom.ac_if;
249 * This resets the registers mostly to defaults, but doesn't affect
250 * EEPROM. After the reset cycle, we pause briefly for the chip to
254 outw(BASE + RECV_CONTROL_REG_W, RCR_SOFTRESET);
256 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
260 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
263 * Set the control register to automatically release succesfully
264 * transmitted packets (making the best use out of our limited
265 * memory) and to enable the EPH interrupt on certain TX errors.
268 outw(BASE + CONTROL_REG_W, (CTR_AUTO_RELEASE | CTR_TE_ENABLE |
269 CTR_CR_ENABLE | CTR_LE_ENABLE));
271 /* Set squelch level to 240mV (default 480mV) */
272 flags = inw(BASE + CONFIG_REG_W);
273 flags |= CR_SET_SQLCH;
274 outw(BASE + CONFIG_REG_W, flags);
277 * Reset the MMU and wait for it to be un-busy.
280 outw(BASE + MMU_CMD_REG_W, MMUCR_RESET);
281 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
285 * Disable all interrupts
287 outb(BASE + INTR_MASK_REG_B, 0x00);
292 * Set the transmitter control. We want it enabled.
298 * I (GB) have been unlucky getting this to work.
300 flags |= TCR_PAD_ENABLE;
303 outw(BASE + TXMIT_CONTROL_REG_W, flags);
307 * Now, enable interrupts
316 outb(BASE + INTR_MASK_REG_B, mask);
317 sc->intr_mask = mask;
318 sc->pages_wanted = -1;
322 * Mark the interface running but not active.
324 ifp->if_flags |= IFF_RUNNING;
325 ifp->if_flags &= ~IFF_OACTIVE;
328 * Attempt to push out any waiting packets.
337 snstart(struct ifnet *ifp)
339 struct sn_softc *sc = ifp->if_softc;
352 if (ifp->if_flags & IFF_OACTIVE) {
356 if (sc->pages_wanted != -1) {
358 printf("%s: snstart() while memory allocation pending\n",
365 * Sneak a peek at the next packet
367 m = ifq_poll(&ifp->if_snd);
373 * Compute the frame length and set pad to give an overall even
374 * number of bytes. Below we assume that the packet length is even.
376 for (len = 0, top = m; m; m = m->m_next)
382 * We drop packets that are too large. Perhaps we should truncate
385 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
386 printf("%s: large packet discarded (A)\n", ifp->if_xname);
387 ++sc->arpcom.ac_if.if_oerrors;
388 m = ifq_dequeue(&ifp->if_snd);
395 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
397 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
398 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
405 * The MMU wants the number of pages to be the number of 256 byte
406 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
407 * include space for the status word, byte count and control bytes in
408 * the allocation request.
410 numPages = (length + 6) >> 8;
414 * Now, try to allocate the memory
417 outw(BASE + MMU_CMD_REG_W, MMUCR_ALLOC | numPages);
420 * Wait a short amount of time to see if the allocation request
421 * completes. Otherwise, I enable the interrupt and wait for
422 * completion asyncronously.
425 time_out = MEMORY_WAIT_TIME;
427 if (inb(BASE + INTR_STAT_REG_B) & IM_ALLOC_INT)
429 } while (--time_out);
434 * No memory now. Oh well, wait until the chip finds memory
435 * later. Remember how many pages we were asking for and
436 * enable the allocation completion interrupt. Also set a
437 * watchdog in case we miss the interrupt. We mark the
438 * interface active since there is no point in attempting an
439 * snstart() until after the memory is available.
441 mask = inb(BASE + INTR_MASK_REG_B) | IM_ALLOC_INT;
442 outb(BASE + INTR_MASK_REG_B, mask);
443 sc->intr_mask = mask;
446 ifp->if_flags |= IFF_OACTIVE;
447 sc->pages_wanted = numPages;
453 * The memory allocation completed. Check the results.
455 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
456 if (packet_no & ARR_FAILED) {
457 printf("%s: Memory allocation failed\n", ifp->if_xname);
461 * We have a packet number, so tell the card to use it.
463 outb(BASE + PACKET_NUM_REG_B, packet_no);
466 * Point to the beginning of the packet
468 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
471 * Send the packet length (+6 for status, length and control byte)
472 * and the status word (set to zeros)
474 outw(BASE + DATA_REG_W, 0);
475 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
476 outb(BASE + DATA_REG_B, (length + 6) >> 8);
479 * Get the packet from the kernel. This will include the Ethernet
480 * frame header, MAC Addresses etc.
482 m = ifq_dequeue(&ifp->if_snd);
485 * Push out the data to the card.
487 for (top = m; m != 0; m = m->m_next) {
492 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
495 * Push out remaining byte.
498 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
505 outw(BASE + DATA_REG_W, 0);
509 outb(BASE + DATA_REG_B, 0);
512 * Push out control byte and unused packet byte The control byte is 0
513 * meaning the packet is even lengthed and no special CRC handling is
516 outw(BASE + DATA_REG_W, 0);
519 * Enable the interrupts and let the chipset deal with it Also set a
520 * watchdog in case we miss the interrupt.
522 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
523 outb(BASE + INTR_MASK_REG_B, mask);
524 sc->intr_mask = mask;
526 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
528 ifp->if_flags |= IFF_OACTIVE;
539 * Is another packet coming in? We don't want to overflow the tiny
540 * RX FIFO. If nothing has arrived then attempt to queue another
543 if (inw(BASE + FIFO_PORTS_REG_W) & FIFO_REMPTY)
551 /* Resume a packet transmit operation after a memory allocation
554 * This is basically a hacked up copy of snstart() which handles
555 * a completed memory allocation the same way snstart() does.
556 * It then passes control to snstart to handle any other queued
560 snresume(struct ifnet *ifp)
562 struct sn_softc *sc = ifp->if_softc;
570 u_short pages_wanted;
573 if (sc->pages_wanted < 0)
576 pages_wanted = sc->pages_wanted;
577 sc->pages_wanted = -1;
580 * Sneak a peek at the next packet
582 m = ifq_poll(&ifp->if_snd);
584 printf("%s: snresume() with nothing to send\n", ifp->if_xname);
588 * Compute the frame length and set pad to give an overall even
589 * number of bytes. Below we assume that the packet length is even.
591 for (len = 0, top = m; m; m = m->m_next)
597 * We drop packets that are too large. Perhaps we should truncate
600 if (len + pad > ETHER_MAX_LEN - ETHER_CRC_LEN) {
601 printf("%s: large packet discarded (B)\n", ifp->if_xname);
603 ifq_dequeue(&ifp->if_snd);
610 * If HW padding is not turned on, then pad to ETHER_MIN_LEN.
612 if (len < ETHER_MIN_LEN - ETHER_CRC_LEN)
613 pad = ETHER_MIN_LEN - ETHER_CRC_LEN - len;
621 * The MMU wants the number of pages to be the number of 256 byte
622 * 'pages', minus 1 (A packet can't ever have 0 pages. We also
623 * include space for the status word, byte count and control bytes in
624 * the allocation request.
626 numPages = (length + 6) >> 8;
632 * The memory allocation completed. Check the results. If it failed,
633 * we simply set a watchdog timer and hope for the best.
635 packet_no = inb(BASE + ALLOC_RESULT_REG_B);
636 if (packet_no & ARR_FAILED) {
637 printf("%s: Memory allocation failed. Weird.\n", ifp->if_xname);
642 * We have a packet number, so tell the card to use it.
644 outb(BASE + PACKET_NUM_REG_B, packet_no);
647 * Now, numPages should match the pages_wanted recorded when the
648 * memory allocation was initiated.
650 if (pages_wanted != numPages) {
651 printf("%s: memory allocation wrong size. Weird.\n", ifp->if_xname);
653 * If the allocation was the wrong size we simply release the
654 * memory once it is granted. Wait for the MMU to be un-busy.
656 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
658 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
663 * Point to the beginning of the packet
665 outw(BASE + POINTER_REG_W, PTR_AUTOINC | 0x0000);
668 * Send the packet length (+6 for status, length and control byte)
669 * and the status word (set to zeros)
671 outw(BASE + DATA_REG_W, 0);
672 outb(BASE + DATA_REG_B, (length + 6) & 0xFF);
673 outb(BASE + DATA_REG_B, (length + 6) >> 8);
676 * Get the packet from the kernel. This will include the Ethernet
677 * frame header, MAC Addresses etc.
679 m = ifq_dequeue(&ifp->if_snd);
682 * Push out the data to the card.
684 for (top = m; m != 0; m = m->m_next) {
689 outsw(BASE + DATA_REG_W, mtod(m, caddr_t), m->m_len / 2);
692 * Push out remaining byte.
695 outb(BASE + DATA_REG_B, *(mtod(m, caddr_t) + m->m_len - 1));
702 outw(BASE + DATA_REG_W, 0);
706 outb(BASE + DATA_REG_B, 0);
709 * Push out control byte and unused packet byte The control byte is 0
710 * meaning the packet is even lengthed and no special CRC handling is
713 outw(BASE + DATA_REG_W, 0);
716 * Enable the interrupts and let the chipset deal with it Also set a
717 * watchdog in case we miss the interrupt.
719 mask = inb(BASE + INTR_MASK_REG_B) | (IM_TX_INT | IM_TX_EMPTY_INT);
720 outb(BASE + INTR_MASK_REG_B, mask);
721 sc->intr_mask = mask;
722 outw(BASE + MMU_CMD_REG_W, MMUCR_ENQUEUE);
732 * Now pass control to snstart() to queue any additional packets
734 ifp->if_flags &= ~IFF_OACTIVE;
738 * We've sent something, so we're active. Set a watchdog in case the
739 * TX_EMPTY interrupt is lost.
741 ifp->if_flags |= IFF_OACTIVE;
749 int status, interrupts;
750 struct sn_softc *sc = (struct sn_softc *) arg;
751 struct ifnet *ifp = &sc->arpcom.ac_if;
754 * Chip state registers
764 * Clear the watchdog.
771 * Obtain the current interrupt mask and clear the hardware mask
772 * while servicing interrupts.
774 mask = inb(BASE + INTR_MASK_REG_B);
775 outb(BASE + INTR_MASK_REG_B, 0x00);
778 * Get the set of interrupts which occurred and eliminate any which
781 interrupts = inb(BASE + INTR_STAT_REG_B);
782 status = interrupts & mask;
785 * Now, process each of the interrupt types.
791 if (status & IM_RX_OVRN_INT) {
794 * Acknowlege Interrupt
797 outb(BASE + INTR_ACK_REG_B, IM_RX_OVRN_INT);
799 ++sc->arpcom.ac_if.if_ierrors;
804 if (status & IM_RCV_INT) {
809 packet_number = inw(BASE + FIFO_PORTS_REG_W);
811 if (packet_number & FIFO_REMPTY) {
814 * we got called , but nothing was on the FIFO
816 printf("sn: Receive interrupt with nothing on FIFO\n");
824 * An on-card memory allocation came through.
826 if (status & IM_ALLOC_INT) {
829 * Disable this interrupt.
831 mask &= ~IM_ALLOC_INT;
832 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
833 snresume(&sc->arpcom.ac_if);
836 * TX Completion. Handle a transmit error message. This will only be
837 * called when there is an error, because of the AUTO_RELEASE mode.
839 if (status & IM_TX_INT) {
842 * Acknowlege Interrupt
845 outb(BASE + INTR_ACK_REG_B, IM_TX_INT);
847 packet_no = inw(BASE + FIFO_PORTS_REG_W);
848 packet_no &= FIFO_TX_MASK;
851 * select this as the packet to read from
853 outb(BASE + PACKET_NUM_REG_B, packet_no);
856 * Position the pointer to the first word from this packet
858 outw(BASE + POINTER_REG_W, PTR_AUTOINC | PTR_READ | 0x0000);
861 * Fetch the TX status word. The value found here will be a
862 * copy of the EPH_STATUS_REG_W at the time the transmit
865 tx_status = inw(BASE + DATA_REG_W);
867 if (tx_status & EPHSR_TX_SUC) {
868 device_printf(sc->dev,
869 "Successful packet caused interrupt\n");
871 ++sc->arpcom.ac_if.if_oerrors;
874 if (tx_status & EPHSR_LATCOL)
875 ++sc->arpcom.ac_if.if_collisions;
878 * Some of these errors will have disabled transmit.
879 * Re-enable transmit now.
884 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE);
886 outw(BASE + TXMIT_CONTROL_REG_W, TCR_ENABLE | TCR_PAD_ENABLE);
890 * kill the failed packet. Wait for the MMU to be un-busy.
893 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
895 outw(BASE + MMU_CMD_REG_W, MMUCR_FREEPKT);
898 * Attempt to queue more transmits.
900 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
901 snstart(&sc->arpcom.ac_if);
904 * Transmit underrun. We use this opportunity to update transmit
905 * statistics from the card.
907 if (status & IM_TX_EMPTY_INT) {
910 * Acknowlege Interrupt
913 outb(BASE + INTR_ACK_REG_B, IM_TX_EMPTY_INT);
916 * Disable this interrupt.
918 mask &= ~IM_TX_EMPTY_INT;
921 card_stats = inw(BASE + COUNTER_REG_W);
926 sc->arpcom.ac_if.if_collisions += card_stats & ECR_COLN_MASK;
929 * Multiple collisions
931 sc->arpcom.ac_if.if_collisions += (card_stats & ECR_MCOLN_MASK) >> 4;
936 * Attempt to enqueue some more stuff.
938 sc->arpcom.ac_if.if_flags &= ~IFF_OACTIVE;
939 snstart(&sc->arpcom.ac_if);
942 * Some other error. Try to fix it by resetting the adapter.
944 if (status & IM_EPH_INT) {
951 * Handled all interrupt sources.
957 * Reestablish interrupts from mask which have not been deselected
958 * during this interrupt. Note that the hardware mask, which was set
959 * to 0x00 at the start of this service routine, may have been
960 * updated by one or more of the interrupt handers and we must let
961 * those new interrupts stay enabled here.
963 mask |= inb(BASE + INTR_MASK_REG_B);
964 outb(BASE + INTR_MASK_REG_B, mask);
965 sc->intr_mask = mask;
971 snread(struct ifnet *ifp)
973 struct sn_softc *sc = ifp->if_softc;
977 u_short packet_length;
982 packet_number = inw(BASE + FIFO_PORTS_REG_W);
984 if (packet_number & FIFO_REMPTY) {
987 * we got called , but nothing was on the FIFO
989 printf("sn: Receive interrupt with nothing on FIFO\n");
996 * Start reading from the start of the packet. Since PTR_RCV is set,
997 * packet number is found in FIFO_PORTS_REG_W, FIFO_RX_MASK.
999 outw(BASE + POINTER_REG_W, PTR_READ | PTR_RCV | PTR_AUTOINC | 0x0000);
1002 * First two words are status and packet_length
1004 status = inw(BASE + DATA_REG_W);
1005 packet_length = inw(BASE + DATA_REG_W) & RLEN_MASK;
1008 * The packet length contains 3 extra words: status, length, and a
1009 * extra word with the control byte.
1014 * Account for receive errors and discard.
1016 if (status & RS_ERRORS) {
1021 * A packet is received.
1025 * Adjust for odd-length packet.
1027 if (status & RS_ODDFRAME)
1031 * Allocate a header mbuf from the kernel.
1033 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1037 m->m_pkthdr.rcvif = ifp;
1038 m->m_pkthdr.len = m->m_len = packet_length;
1041 * Attach an mbuf cluster
1043 MCLGET(m, MB_DONTWAIT);
1046 * Insist on getting a cluster
1048 if ((m->m_flags & M_EXT) == 0) {
1051 printf("sn: snread() kernel memory allocation problem\n");
1056 * Get packet, including link layer address, from interface.
1059 data = mtod(m, u_char *);
1060 insw(BASE + DATA_REG_W, data, packet_length >> 1);
1061 if (packet_length & 1) {
1062 data += packet_length & ~1;
1063 *data = inb(BASE + DATA_REG_B);
1067 m->m_pkthdr.len = m->m_len = packet_length;
1069 (*ifp->if_input)(ifp, m);
1074 * Error or good, tell the card to get rid of this packet Wait for
1075 * the MMU to be un-busy.
1078 while (inw(BASE + MMU_CMD_REG_W) & MMUCR_BUSY) /* NOTHING */
1080 outw(BASE + MMU_CMD_REG_W, MMUCR_RELEASE);
1083 * Check whether another packet is ready
1085 packet_number = inw(BASE + FIFO_PORTS_REG_W);
1086 if (packet_number & FIFO_REMPTY) {
1094 * Handle IOCTLS. This function is completely stolen from if_ep.c
1095 * As with its progenitor, it does not handle hardware address
1099 snioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
1101 struct sn_softc *sc = ifp->if_softc;
1108 if ((ifp->if_flags & IFF_UP) == 0 && ifp->if_flags & IFF_RUNNING) {
1109 ifp->if_flags &= ~IFF_RUNNING;
1113 /* reinitialize card on any parameter change */
1121 bcopy((caddr_t) sc->sc_addr, (caddr_t) & ifr->ifr_data,
1122 sizeof(sc->sc_addr));
1127 /* update multicast filter list. */
1132 /* update multicast filter list. */
1137 error = ether_ioctl(ifp, cmd, data);
1147 snreset(struct sn_softc *sc)
1158 snwatchdog(struct ifnet *ifp)
1162 sn_intr(ifp->if_softc);
1168 /* 1. zero the interrupt mask
1169 * 2. clear the enable receive flag
1170 * 3. clear the enable xmit flags
1173 snstop(struct sn_softc *sc)
1176 struct ifnet *ifp = &sc->arpcom.ac_if;
1179 * Clear interrupt mask; disable all interrupts.
1182 outb(BASE + INTR_MASK_REG_B, 0x00);
1185 * Disable transmitter and Receiver
1188 outw(BASE + RECV_CONTROL_REG_W, 0x0000);
1189 outw(BASE + TXMIT_CONTROL_REG_W, 0x0000);
1199 sn_activate(device_t dev)
1201 struct sn_softc *sc = device_get_softc(dev);
1205 sc->port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &sc->port_rid,
1206 0, ~0, SMC_IO_EXTENT, RF_ACTIVE);
1207 if (!sc->port_res) {
1209 device_printf(dev, "Cannot allocate ioport\n");
1215 sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &sc->irq_rid,
1219 device_printf(dev, "Cannot allocate irq\n");
1224 err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET, sn_intr, sc,
1225 &sc->intrhand, NULL);
1231 sc->sn_io_addr = rman_get_start(sc->port_res);
1236 sn_deactivate(device_t dev)
1238 struct sn_softc *sc = device_get_softc(dev);
1241 bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
1244 bus_release_resource(dev, SYS_RES_IOPORT, sc->port_rid,
1248 bus_release_resource(dev, SYS_RES_IRQ, sc->irq_rid,
1255 * Function: sn_probe( device_t dev, int pccard )
1258 * Tests to see if a given ioaddr points to an SMC9xxx chip.
1259 * Tries to cause as little damage as possible if it's not a SMC chip.
1260 * Returns a 0 on success
1263 * (1) see if the high byte of BANK_SELECT is 0x33
1264 * (2) compare the ioaddr with the base register's address
1265 * (3) see if I recognize the chip ID in the appropriate register
1270 sn_probe(device_t dev, int pccard)
1272 struct sn_softc *sc = device_get_softc(dev);
1274 u_short revision_register;
1275 u_short base_address_register;
1279 if ((err = sn_activate(dev)) != 0)
1282 ioaddr = sc->sn_io_addr;
1285 * First, see if the high byte is 0x33
1287 bank = inw(ioaddr + BANK_SELECT_REG_W);
1288 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1290 device_printf(dev, "test1 failed\n");
1295 * The above MIGHT indicate a device, but I need to write to further
1296 * test this. Go to bank 0, then test that the register still
1297 * reports the high byte is 0x33.
1299 outw(ioaddr + BANK_SELECT_REG_W, 0x0000);
1300 bank = inw(ioaddr + BANK_SELECT_REG_W);
1301 if ((bank & BSR_DETECT_MASK) != BSR_DETECT_VALUE) {
1303 device_printf(dev, "test2 failed\n");
1308 * well, we've already written once, so hopefully another time won't
1309 * hurt. This time, I need to switch the bank register to bank 1, so
1310 * I can access the base address register. The contents of the
1311 * BASE_ADDR_REG_W register, after some jiggery pokery, is expected
1312 * to match the I/O port address where the adapter is being probed.
1314 outw(ioaddr + BANK_SELECT_REG_W, 0x0001);
1315 base_address_register = inw(ioaddr + BASE_ADDR_REG_W);
1318 * This test is nonsence on PC-card architecture, so if
1319 * pccard == 1, skip this test. (hosokawa)
1321 if (!pccard && (ioaddr != (base_address_register >> 3 & 0x3E0))) {
1324 * Well, the base address register didn't match. Must not
1325 * have been a SMC chip after all.
1328 * printf("sn: ioaddr %x doesn't match card configuration
1329 * (%x)\n", ioaddr, base_address_register >> 3 & 0x3E0 );
1333 device_printf(dev, "test3 failed ioaddr = 0x%x, "
1334 "base_address_register = 0x%x\n", ioaddr,
1335 base_address_register >> 3 & 0x3E0);
1340 * Check if the revision register is something that I recognize.
1341 * These might need to be added to later, as future revisions could
1344 outw(ioaddr + BANK_SELECT_REG_W, 0x3);
1345 revision_register = inw(ioaddr + REVISION_REG_W);
1346 if (!chip_ids[(revision_register >> 4) & 0xF]) {
1349 * I don't regonize this chip, so...
1352 device_printf(dev, "test4 failed\n");
1357 * at this point I'll assume that the chip is an SMC9xxx. It might be
1358 * prudent to check a listing of MAC addresses against the hardware
1359 * address, or do some other tests.
1371 sn_setmcast(struct sn_softc *sc)
1373 struct ifnet *ifp = (struct ifnet *)sc;
1377 * Set the receiver filter. We want receive enabled and auto strip
1378 * of CRC from received packet. If we are promiscuous then set that
1381 flags = RCR_ENABLE | RCR_STRIP_CRC;
1383 if (ifp->if_flags & IFF_PROMISC) {
1384 flags |= RCR_PROMISC | RCR_ALMUL;
1385 } else if (ifp->if_flags & IFF_ALLMULTI) {
1389 if (sn_getmcf(&sc->arpcom, mcf)) {
1392 outw(BASE + MULTICAST1_REG_W,
1393 ((u_short)mcf[1] << 8) | mcf[0]);
1394 outw(BASE + MULTICAST2_REG_W,
1395 ((u_short)mcf[3] << 8) | mcf[2]);
1396 outw(BASE + MULTICAST3_REG_W,
1397 ((u_short)mcf[5] << 8) | mcf[4]);
1398 outw(BASE + MULTICAST4_REG_W,
1399 ((u_short)mcf[7] << 8) | mcf[6]);
1405 outw(BASE + RECV_CONTROL_REG_W, flags);
1409 sn_getmcf(struct arpcom *ac, u_char *mcf)
1412 u_int index, index2;
1413 u_char *af = (u_char *) mcf;
1414 struct ifmultiaddr *ifma;
1418 LIST_FOREACH(ifma, &ac->ac_if.if_multiaddrs, ifma_link) {
1419 if (ifma->ifma_addr->sa_family != AF_LINK)
1421 index = smc_crc(LLADDR((struct sockaddr_dl *)ifma->ifma_addr)) & 0x3f;
1423 for (i = 0; i < 6; i++) {
1425 index2 |= (index & 0x01);
1428 af[index2 >> 3] |= 1 << (index2 & 7);
1430 return 1; /* use multicast filter */
1438 const u_int poly = 0xedb88320;
1439 u_int v = 0xffffffff;
1442 for (perByte = 0; perByte < ETHER_ADDR_LEN; perByte++) {
1444 for (perBit = 0; perBit < 8; perBit++) {
1445 v = (v >> 1)^(((v ^ c) & 0x01) ? poly : 0);