2 * Copyright 1998, Joerg Wunsch
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 unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * $FreeBSD: src/sys/i386/isa/if_rdp.c,v 1.6.2.2 2000/07/17 21:24:32 archie Exp $
28 * $DragonFly: src/sys/dev/netif/rdp/if_rdp.c,v 1.7 2004/01/06 03:17:24 dillon Exp $
32 * Device driver for RealTek RTL 8002 (`REDP') based pocket-ethernet
33 * adapters, hooked up to a printer port. `rdp' is a shorthand for
34 * REDP since some tools like netstat work best if the interface name
35 * has no more than three letters.
37 * Driver configuration flags so far:
38 * flags 0x1 -- assume 74S288 EEPROM (default 94C46)
39 * flags 0x2 -- use `slow' mode (mode 3 of the packet driver, default 0)
41 * Maybe this driver will some day also work with the successor, RTL
42 * 8012 (`AREDP'), which is unfortunately not fully register-
43 * compatible with the 8002. The 8012 offers support for faster
44 * transfer modi like bidirectional SPP and EPP, 64 K x 4 buffer
45 * memory as opposed to 16 K x 4 for the 8002, a multicast filter, and
46 * a builtin multiplexer that allows chaining a printer behind the
49 * About the only documentation i've been able to find about the RTL
50 * 8002 was the packet driver source code at ftp.realtek.com.tw, so
51 * this driver is somewhat based on the way the packet driver handles
52 * the chip. The exact author of the packet driver is unknown, the
53 * only name that i could find in the source was someone called Chiu,
54 * supposedly an employee of RealTek. So credits to them for that
55 * piece of code which has proven valuable to me.
57 * Later on, Leo kuo <leo@realtek.com.tw> has been very helpful to me
58 * by sending me a readable (PDF) file documenting the RTL 8012, which
59 * helped me to also understand the 8002, as well as by providing me
60 * with the source code of the 8012 packet driver that i haven't been
61 * able to find on the FTP site. A big Thanks! goes here to RealTek
62 * for this kind of service.
67 #include <sys/param.h>
68 #include <sys/systm.h>
70 #include <sys/sockio.h>
71 #include <sys/malloc.h>
73 #include <sys/socket.h>
74 #include <sys/syslog.h>
75 #include <sys/linker_set.h>
76 #include <sys/module.h>
78 #include <net/ethernet.h>
80 #include <net/if_arp.h>
81 #include <net/if_dl.h>
82 #include <net/if_mib.h>
85 #include <netinet/in.h>
86 #include <netinet/if_ether.h>
91 #include <netns/ns_if.h>
96 #include <machine/clock.h>
97 #include <machine/md_var.h>
99 #include <bus/isa/i386/isa_device.h>
100 #include <i386/isa/icu.h>
101 #include "if_rdpreg.h"
102 #include <i386/isa/intr_machdep.h>
104 #define IOCTL_CMD_T u_long
107 * Debug levels (ORed together):
108 * != 0 - general (bad packets etc.)
109 * 2 - debug EEPROM IO
110 * 4 - debug interrupt status
116 * rdp_softc: per interface info and status
119 struct arpcom arpcom; /*
120 * Ethernet common, always goes first so
121 * a rdp_softc * can be cast into an
122 * arpcom * or into an ifnet *.
126 * local stuff, somewhat sorted by memory alignment class
128 u_short baseaddr; /* IO port address */
129 u_short txsize; /* tx size for next (buffered) packet,
130 * there's only one additional packet
131 * we can buffer, thus a single variable
132 * ought to be enough */
133 int txbusy; /* tx is transmitting */
134 int txbuffered; /* # of packets in tx buffer */
135 int slow; /* use lpt_control to send data */
136 u_char irqenbit; /* mirror of current Ctrl_IRQEN */
138 * type of parameter EEPROM; device flags 0x1 selects 74S288
141 EEPROM_93C46, EEPROM_74S288 /* or 82S123 */
145 DECLARE_DUMMY_MODULE(if_rdp);
147 static struct rdp_softc rdp_softc[NRDP];
150 * Since there's no fixed location in the EEPROM about where to find
151 * the ethernet hardware address, we drop a table of valid OUIs here,
152 * and search through the EEPROM until we find a possible valid
153 * Ethernet address. Only the first 16 bits of all possible OUIs are
154 * recorded in the table (as obtained from
155 * http://standards.ieee.org/regauth/oui/oui.txt).
158 static u_short allowed_ouis[] = {
159 0x0000, 0x0001, 0x0002, 0x0004, 0x0005, 0x0006, 0x0007,
160 0x0008, 0x0010, 0x001C, 0x0020, 0x0040, 0x0050, 0x0060,
161 0x0070, 0x0080, 0x0090, 0x009D, 0x00A0, 0x00AA, 0x00BB,
162 0x00C0, 0x00CF, 0x00DD, 0x00E0, 0x00E6, 0x0207, 0x021C,
163 0x0260, 0x0270, 0x029D, 0x02AA, 0x02BB, 0x02C0, 0x02CF,
164 0x02E6, 0x040A, 0x04E0, 0x0800, 0x08BB, 0x1000, 0x1100,
171 static int rdp_probe (struct isa_device *);
172 static int rdp_attach (struct isa_device *);
175 * Required entry points.
177 static void rdp_init(void *);
178 static int rdp_ioctl(struct ifnet *, IOCTL_CMD_T, caddr_t);
179 static void rdp_start(struct ifnet *);
180 static void rdp_reset(struct ifnet *);
181 static void rdp_watchdog(struct ifnet *);
182 static void rdpintr(int);
185 * REDP private functions.
188 static void rdp_stop(struct rdp_softc *);
189 static void rdp_rint(struct rdp_softc *);
190 static void rdp_get_packet(struct rdp_softc *, unsigned);
191 static u_short rdp_write_mbufs(struct rdp_softc *, struct mbuf *);
192 static int rdp_gethwaddr_93c46(struct rdp_softc *, u_char *);
193 static void rdp_gethwaddr_74s288(struct rdp_softc *, u_char *);
194 static void rdp_93c46_cmd(struct rdp_softc *, u_short, unsigned);
195 static u_short rdp_93c46_read(struct rdp_softc *);
197 struct isa_driver rdpdriver = {
201 1 /* we wanna get a chance before lptN */
205 * REDP-specific functions.
207 * They are inlined, thus go first in this file. Together with gcc's
208 * usual optimization, these functions probably come close to the
209 * packet driver's hand-optimized code. ;-)
211 * Comments are partially obtained from the packet driver as well.
212 * Some of the function names contain register names which don't make
213 * much sense for us, but i've kept them for easier reference in
214 * comparision to the packet driver.
216 * Some of the functions are currently not used by the driver; it's
217 * not quite clear whether we ever need them at all. They are
218 * supposedly even slower than what is currently implemented as `slow'
219 * mode. Right now, `fast' (default) mode is what the packet driver
220 * calls mode 0, slow mode is mode 3 (writing through lpt_control,
223 * We should autoprobe the modi, as opposed to making them dependent
224 * on a kernel configuration flag.
228 * read a nibble from rreg; end-of-data cmd is not issued;
229 * used for general register read.
231 * Unlike the packet driver's version, i'm shifting the result
232 * by 3 here (as opposed to within the caller's code) for clarity.
235 static __inline u_char
236 RdNib(struct rdp_softc *sc, u_char rreg)
239 outb(sc->baseaddr + lpt_data, EOC + rreg);
240 outb(sc->baseaddr + lpt_data, RdAddr + rreg); /* write addr */
241 (void)inb(sc->baseaddr + lpt_status);
242 return (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
247 * read a byte from MAR register through lpt_data; the low nibble is
248 * read prior to the high one; end-of-read command is not issued; used
249 * for remote DMA in mode 4 + 5
251 static __inline u_char
252 RdByte(struct rdp_softc *sc)
256 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
257 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
258 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
259 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
260 return hinib + lonib;
265 * read a byte from MAR register through lpt_data; the low nibble is
266 * read prior to the high one; end-of-read command is not issued; used
267 * for remote DMA in mode 6 + 7
269 static __inline u_char
270 RdByte1(struct rdp_softc *sc)
274 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
275 (void)inb(sc->baseaddr + lpt_status);
276 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
277 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
278 (void)inb(sc->baseaddr + lpt_status);
279 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
280 return hinib + lonib;
286 * read a byte from MAR register through lpt_control; the low nibble is
287 * read prior to the high one; end-of-read command is not issued; used
288 * for remote DMA in mode 0 + 1
290 static __inline u_char
291 RdByteA1(struct rdp_softc *sc)
295 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
296 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
297 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
298 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
299 return hinib + lonib;
304 * read a byte from MAR register through lpt_control; the low nibble is
305 * read prior to the high one; end-of-read command is not issued; used
306 * for remote DMA in mode 2 + 3
308 static __inline u_char
309 RdByteA2(struct rdp_softc *sc)
313 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
314 (void)inb(sc->baseaddr + lpt_status);
315 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
316 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
317 (void)inb(sc->baseaddr + lpt_status);
318 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
319 return hinib + lonib;
326 RdEnd(struct rdp_softc *sc, u_char rreg)
329 outb(sc->baseaddr + lpt_data, EOC + rreg);
333 * Write a nibble to a register; end-of-write is issued.
334 * Used for general register write.
337 WrNib(struct rdp_softc *sc, u_char wreg, u_char wdata)
340 /* prepare and write address */
341 outb(sc->baseaddr + lpt_data, EOC + wreg);
342 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
343 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
344 /* prepare and write data */
345 outb(sc->baseaddr + lpt_data, WrAddr + wdata);
346 outb(sc->baseaddr + lpt_data, wdata);
347 outb(sc->baseaddr + lpt_data, wdata);
349 outb(sc->baseaddr + lpt_data, EOC + wdata);
353 * Write a byte to a register; end-of-write is issued.
354 * Used for general register write.
357 WrByte(struct rdp_softc *sc, u_char wreg, u_char wdata)
360 /* prepare and write address */
361 outb(sc->baseaddr + lpt_data, EOC + wreg);
362 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
363 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
364 /* prepare and write low nibble */
365 outb(sc->baseaddr + lpt_data, WrAddr + (wdata & 0x0F));
366 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
367 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
368 /* prepare and write high nibble */
370 outb(sc->baseaddr + lpt_data, wdata);
371 outb(sc->baseaddr + lpt_data, wdata + HNib);
372 outb(sc->baseaddr + lpt_data, wdata + HNib);
374 outb(sc->baseaddr + lpt_data, EOC + wdata + HNib);
378 * Write the byte to DRAM via lpt_data;
379 * used for remote DMA write in mode 0 / 2 / 4
382 WrByteALToDRAM(struct rdp_softc *sc, u_char val)
385 outb(sc->baseaddr + lpt_data, val & 0x0F);
386 outb(sc->baseaddr + lpt_data, MkHi(val));
390 * Write the byte to DRAM via lpt_control;
391 * used for remote DMA write in mode 1 / 3 / 5
394 WrByteALToDRAMA(struct rdp_softc *sc, u_char val)
397 outb(sc->baseaddr + lpt_data, val & 0x0F);
398 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
399 outb(sc->baseaddr + lpt_data, val >> 4);
400 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
403 #if 0 /* they could be used for the RAM test */
405 * Write the u_short to DRAM via lpt_data;
406 * used for remote DMA write in mode 0 / 2 / 4
409 WrWordbxToDRAM(struct rdp_softc *sc, u_short val)
412 outb(sc->baseaddr + lpt_data, val & 0x0F);
414 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
416 outb(sc->baseaddr + lpt_data, val & 0x0F);
418 outb(sc->baseaddr + lpt_data, val + HNib);
423 * Write the u_short to DRAM via lpt_control;
424 * used for remote DMA write in mode 1 / 3 / 5
427 WrWordbxToDRAMA(struct rdp_softc *sc, u_short val)
430 outb(sc->baseaddr + lpt_data, val & 0x0F);
431 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
433 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
434 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
436 outb(sc->baseaddr + lpt_data, val & 0x0F);
437 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
439 outb(sc->baseaddr + lpt_data, val + HNib);
440 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
446 * Determine if the device is present
449 * a pointer to an isa_device struct
451 * 0 if device not found
452 * or # of i/o addresses used (if found)
455 rdp_probe(struct isa_device *isa_dev)
457 int unit = isa_dev->id_unit;
458 struct rdp_softc *sc = &rdp_softc[unit];
460 intrmask_t irqmap[3];
463 if (unit < 0 || unit >= NRDP)
466 sc->baseaddr = isa_dev->id_iobase;
467 if (isa_dev->id_flags & 1)
468 sc->eeprom = EEPROM_74S288;
469 /* else defaults to 93C46 */
470 if (isa_dev->id_flags & 2)
473 /* let R/WB = A/DB = CSB = high to be ready for next r/w cycle */
474 outb(sc->baseaddr + lpt_data, 0xFF);
475 /* DIR = 0 for write mode, IRQEN=0, SLCT=INIT=AUTOFEED=STB=high */
476 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
478 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
481 b1 = RdNib(sc, CMR1);
483 b2 = RdNib(sc, CMR2) & 0x0f;
484 b2 |= RdNib(sc, CMR2 + HNib) << 4;
485 RdEnd(sc, CMR2 + HNib);
487 * After the reset, we expect CMR1 & 7 to be 1 (rx buffer empty),
488 * and CMR2 & 0xf7 to be 0x20 (receive mode set to physical and
492 printf("rdp%d: CMR1 = %#x, CMR2 = %#x\n", unit, b1, b2);
494 if ((b1 & (CMR1_BUFE | CMR1_IRQ | CMR1_TRA)) != CMR1_BUFE
495 || (b2 & ~CMR2_IRQINV) != CMR2_AM_PB)
499 * We have found something that could be a RTL 80[01]2, now
500 * see whether we can generate an interrupt.
505 * Test whether our configured IRQ is working.
507 * Set to no acception mode + IRQout, then enable RxE + TxE,
508 * then cause RBER (by advancing the read pointer although
509 * the read buffer is empty) to generate an interrupt.
511 WrByte(sc, CMR2, CMR2_IRQOUT);
512 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
513 WrNib(sc, CMR1, CMR1_RDPAC);
516 irqmap[0] = isa_irq_pending();
517 sval[0] = inb(sc->baseaddr + lpt_status);
519 /* allow IRQs to pass the parallel interface */
520 outb(sc->baseaddr + lpt_control, Ctrl_IRQEN + Ctrl_SelData);
522 /* generate interrupt */
523 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
526 irqmap[1] = isa_irq_pending();
527 sval[1] = inb(sc->baseaddr + lpt_status);
529 /* de-assert and disable IRQ */
530 WrNib(sc, IMR + HNib, MkHi(0));
531 (void)inb(sc->baseaddr + lpt_status); /* might be necessary to
534 irqmap[2] = isa_irq_pending();
535 sval[2] = inb(sc->baseaddr + lpt_status);
537 WrNib(sc, CMR1 + HNib, MkHi(0));
538 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
539 WrNib(sc, CMR2, CMR2_IRQINV);
544 printf("rdp%d: irq maps / lpt status "
545 "%#x/%#x - %#x/%#x - %#x/%#x (id_irq %#x)\n",
546 unit, irqmap[0], sval[0], irqmap[1], sval[1],
547 irqmap[2], sval[2], isa_dev->id_irq);
549 if ((irqmap[1] & isa_dev->id_irq) == 0) {
550 printf("rdp%d: configured IRQ (%d) cannot be asserted "
552 unit, ffs(isa_dev->id_irq) - 1);
554 printf(" (probable IRQ: %d)", ffs(irqmap[1]) - 1);
560 * XXX should do RAMtest here
563 switch (sc->eeprom) {
565 if (rdp_gethwaddr_93c46(sc, sc->arpcom.ac_enaddr) == 0) {
566 printf("rdp%d: failed to find a valid hardware "
567 "address in EEPROM\n",
574 rdp_gethwaddr_74s288(sc, sc->arpcom.ac_enaddr);
578 return lpt_control + 1;
582 * Install interface into kernel networking data structures
585 rdp_attach(struct isa_device *isa_dev)
587 int unit = isa_dev->id_unit;
588 struct rdp_softc *sc = &rdp_softc[unit];
589 struct ifnet *ifp = &sc->arpcom.ac_if;
591 isa_dev->id_ointr = rdpintr;
599 * Initialize ifnet structure
602 if_initname(ifp, "rdp", unit);
603 ifp->if_output = ether_output;
604 ifp->if_start = rdp_start;
605 ifp->if_ioctl = rdp_ioctl;
606 ifp->if_watchdog = rdp_watchdog;
607 ifp->if_init = rdp_init;
608 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
609 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
612 * Attach the interface
614 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
617 * Print additional info when attached
619 printf("%s: RealTek RTL%s pocket ethernet, EEPROM %s, %s mode\n",
621 "8002", /* hook for 8012 */
622 sc->eeprom == EEPROM_93C46? "93C46": "74S288",
623 sc->slow? "slow": "fast");
624 printf("%s: address %6D\n", ifp->if_xname,
625 sc->arpcom.ac_enaddr, ":");
634 rdp_reset(struct ifnet *ifp)
636 struct rdp_softc *sc = ifp->if_softc;
642 * Stop interface and re-initialize.
651 * Take interface offline.
654 rdp_stop(struct rdp_softc *sc)
657 sc->txbusy = sc->txbusy = 0;
659 /* disable printer interface interrupts */
661 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
662 outb(sc->baseaddr + lpt_data, 0xff);
664 /* reset the RTL 8002 */
665 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
670 * Device timeout/watchdog routine. Entered if the device neglects to
671 * generate an interrupt after a transmit has been started on it.
674 rdp_watchdog(struct ifnet *ifp)
677 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
689 struct rdp_softc *sc = xsc;
690 struct ifnet *ifp = &sc->arpcom.ac_if;
694 /* address not known */
695 if (TAILQ_EMPTY(&ifp->if_addrhead))
702 /* program ethernet ID into the chip */
703 for (i = 0, reg = IDR0; i < 6; i++, reg++)
704 WrByte(sc, reg, sc->arpcom.ac_enaddr[i]);
706 /* set accept mode */
707 WrNib(sc, CMR2 + HNib,
708 MkHi((ifp->if_flags & IFF_PROMISC)? CMR2_AM_ALL: CMR2_AM_PB));
710 /* enable tx and rx */
711 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
713 /* allow interrupts to happen */
714 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
715 WrNib(sc, IMR, ISR_TOK | ISR_TER | ISR_ROK | ISR_RER);
716 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
718 /* allow IRQs to pass the parallel interface */
719 sc->irqenbit = Ctrl_IRQEN;
720 outb(sc->baseaddr + lpt_control, sc->irqenbit + Ctrl_SelData);
722 /* clear all flags */
723 sc->txbusy = sc->txbuffered = 0;
726 * Set 'running' flag, and clear output active flag.
728 ifp->if_flags |= IFF_RUNNING;
729 ifp->if_flags &= ~IFF_OACTIVE;
732 * ...and attempt to start output
740 * Start output on interface.
741 * We make two assumptions here:
742 * 1) that the current priority is set to splimp _before_ this code
743 * is called *and* is returned to the appropriate priority after
745 * 2) that the IFF_OACTIVE flag is checked before this code is called
746 * (i.e. that the output part of the interface is idle)
749 rdp_start(struct ifnet *ifp)
751 struct rdp_softc *sc = ifp->if_softc;
758 * See if there is room to put another packet in the buffer.
760 if (sc->txbuffered) {
762 * No room. Indicate this to the outside world and exit.
764 ifp->if_flags |= IFF_OACTIVE;
767 IF_DEQUEUE(&ifp->if_snd, m);
770 * We are using the !OACTIVE flag to indicate to the outside
771 * world that we can accept an additional packet rather than
772 * that the transmitter is _actually_ active. Indeed, the
773 * transmitter may be active, but if we haven't filled all the
774 * buffers with data then we still want to accept more.
776 ifp->if_flags &= ~IFF_OACTIVE;
781 * Copy the mbuf chain into the transmit buffer
784 len = rdp_write_mbufs(sc, m);
788 /* ensure minimal valid ethernet length */
789 len = max(len, (ETHER_MIN_LEN-ETHER_CRC_LEN));
792 * Actually start the transceiver. Set a timeout in case the
793 * Tx interrupt never arrives.
796 WrNib(sc, TBCR1, len >> 8);
797 WrByte(sc, TBCR0, len & 0xff);
798 WrNib(sc, CMR1, CMR1_TRA);
807 * Tap off here if there is a bpf listener.
816 * Loop back to the top to possibly buffer more packets
822 * Process an ioctl request.
825 rdp_ioctl(struct ifnet *ifp, IOCTL_CMD_T command, caddr_t data)
827 struct rdp_softc *sc = ifp->if_softc;
837 error = ether_ioctl(ifp, command, data);
842 * If the interface is marked up and stopped, then start it.
843 * If it is marked down and running, then stop it.
845 if (ifp->if_flags & IFF_UP) {
846 if ((ifp->if_flags & IFF_RUNNING) == 0)
849 if (ifp->if_flags & IFF_RUNNING) {
851 ifp->if_flags &= ~IFF_RUNNING;
856 * Promiscuous flag may have changed, propagage this
859 if (ifp->if_flags & IFF_UP)
860 WrNib(sc, CMR2 + HNib,
861 MkHi((ifp->if_flags & IFF_PROMISC)?
862 CMR2_AM_ALL: CMR2_AM_PB));
869 * Multicast list has changed; we don't support it.
882 * External interrupt service routine.
887 struct rdp_softc *sc = rdp_softc + unit;
888 struct ifnet *ifp = (struct ifnet *)sc;
889 u_char isr, tsr, rsr, colls;
891 /* disable interrupts, so SD3 can be routed to the pin */
893 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
894 WrNib(sc, CMR2, CMR2_IRQINV);
896 * loop until there are no more new interrupts
899 isr = RdNib(sc, ISR);
900 isr |= RdNib(sc, ISR + HNib) << 4;
901 RdEnd(sc, ISR + HNib);
906 printf("rdp%d: ISR = %#x\n", unit, isr);
910 * Clear the pending interrupt bits.
912 WrNib(sc, ISR, isr & 0x0f);
914 WrNib(sc, ISR + HNib, MkHi(isr));
917 * Handle transmitter interrupts.
919 if (isr & (ISR_TOK | ISR_TER)) {
920 tsr = RdNib(sc, TSR);
924 printf("rdp%d: tsr %#x\n", unit, tsr);
930 * Update total number of successfully
931 * transmitted packets.
936 colls = RdNib(sc, COLR);
938 ifp->if_collisions += colls;
942 * reset tx busy and output active flags
945 ifp->if_flags &= ~IFF_OACTIVE;
948 * If we had already queued up another packet,
949 * start sending it now.
951 if (sc->txbuffered) {
952 WrNib(sc, TBCR1, sc->txsize >> 8);
953 WrByte(sc, TBCR0, sc->txsize & 0xff);
954 WrNib(sc, CMR1, CMR1_TRA);
960 * clear watchdog timer
968 * Handle receiver interrupts
970 if (isr & (ISR_ROK | ISR_RER | ISR_RBER)) {
971 rsr = RdNib(sc, RSR);
972 rsr |= RdNib(sc, RSR + HNib) << 4;
973 RdEnd(sc, RSR + HNib);
975 if (isr & (ISR_RER | ISR_RBER))
976 printf("rdp%d: rsr %#x\n", unit, rsr);
979 if (rsr & (RSR_PUN | RSR_POV)) {
980 printf("rdp%d: rsr %#x, resetting\n",
988 * CRC and FA errors are recorded in
989 * rdp_rint() on a per-packet basis
992 if (isr & (ISR_ROK | ISR_RER))
997 * If it looks like the transmitter can take more data,
998 * attempt to start output on the interface. This is done
999 * after handling the receiver to give the receiver priority.
1001 if ((ifp->if_flags & IFF_OACTIVE) == 0)
1005 /* re-enable interrupts */
1006 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
1007 sc->irqenbit = Ctrl_IRQEN;
1008 outb(sc->baseaddr + lpt_control, Ctrl_SelData + sc->irqenbit);
1012 * Ethernet interface receiver interrupt.
1015 rdp_rint(struct rdp_softc *sc)
1017 struct ifnet *ifp = &sc->arpcom.ac_if;
1021 u_char *packet_ptr, b, status;
1022 int excessive_bad_pkts = 0;
1025 * Fetch the packets from the NIC's buffer.
1028 b = RdNib(sc, CMR1);
1032 /* no more packets */
1035 /* first, obtain the buffer header */
1037 outb(sc->baseaddr + lpt_data, MAR + EOC); /* prepare addr */
1038 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1039 outb(sc->baseaddr + lpt_data, MAR + RdAddr + HNib);
1041 packet_ptr = (u_char *)&rh;
1043 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1044 *packet_ptr = RdByteA2(sc);
1046 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1047 *packet_ptr = RdByteA1(sc);
1049 RdEnd(sc, MAR + HNib);
1050 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1052 len = rh.pktlen - ETHER_CRC_LEN;
1055 if ((status & (RSR_ROK | RSR_CRC | RSR_FA)) != RSR_ROK ||
1056 len > (ETHER_MAX_LEN - ETHER_CRC_LEN) ||
1057 len < (ETHER_MIN_LEN - ETHER_CRC_LEN) ||
1060 printf("%s: bad packet in buffer, "
1061 "len %d, status %#x\n",
1062 ifp->if_xname, (int)len, (int)status);
1065 /* rx jump packet */
1066 WrNib(sc, CMR1, CMR1_RDPAC);
1067 if (++excessive_bad_pkts > 5) {
1069 * the chip seems to be stuck, we are
1070 * probably seeing the same bad packet
1071 * over and over again
1074 printf("%s: resetting due to an "
1075 "excessive number of bad packets\n",
1087 excessive_bad_pkts = 0;
1088 rdp_get_packet(sc, len);
1094 * Retreive packet from NIC memory and send to the next level up via
1098 rdp_get_packet(struct rdp_softc *sc, unsigned len)
1100 struct ether_header *eh;
1105 /* Allocate a header mbuf */
1106 MGETHDR(m, M_DONTWAIT, MT_DATA);
1109 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1110 m->m_pkthdr.len = m->m_len = len;
1113 * We always put the received packet in a single buffer -
1114 * either with just an mbuf header or in a cluster attached
1115 * to the header. The +2 is to compensate for the alignment
1118 if ((len + 2) > MHLEN) {
1119 /* Attach an mbuf cluster */
1120 MCLGET(m, M_DONTWAIT);
1122 /* Insist on getting a cluster */
1123 if ((m->m_flags & M_EXT) == 0) {
1130 * The +2 is to longword align the start of the real packet.
1131 * This is important for NFS.
1134 eh = mtod(m, struct ether_header *);
1137 * Get packet, including link layer address, from interface.
1139 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1140 outb(sc->baseaddr + lpt_data, RdAddr + MAR);
1142 packet_ptr = (u_char *)eh;
1144 for (s = 0; s < len; s++, packet_ptr++)
1145 *packet_ptr = RdByteA2(sc);
1147 for (s = 0; s < len; s++, packet_ptr++)
1148 *packet_ptr = RdByteA1(sc);
1150 RdEnd(sc, MAR + HNib);
1151 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1152 WrNib(sc, CMR1, CMR1_RDPAC);
1155 * Remove link layer address.
1157 m->m_pkthdr.len = m->m_len = len - sizeof(struct ether_header);
1158 m->m_data += sizeof(struct ether_header);
1160 ether_input(&sc->arpcom.ac_if, eh, m);
1164 * Write an mbuf chain to the NIC's tx buffer.
1167 rdp_write_mbufs(struct rdp_softc *sc, struct mbuf *m)
1174 /* First, count up the total number of bytes to copy */
1175 for (total_len = 0, mp = m; mp; mp = mp->m_next)
1176 total_len += mp->m_len;
1181 outb(sc->baseaddr + lpt_data, MAR | EOC);
1184 * Transfer the mbuf chain to the NIC memory.
1187 /* writing the first byte is complicated */
1188 outb(sc->baseaddr + lpt_control,
1189 Ctrl_LNibRead | sc->irqenbit);
1190 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1191 b = *(u_char *)m->m_data;
1192 outb(sc->baseaddr + lpt_data, (b & 0x0f) | 0x40);
1193 outb(sc->baseaddr + lpt_data, b & 0x0f);
1194 outb(sc->baseaddr + lpt_data, b >> 4);
1195 outb(sc->baseaddr + lpt_control,
1196 Ctrl_HNibRead | sc->irqenbit);
1197 /* advance the mbuf pointer */
1201 /* write the remaining bytes */
1203 for (i = 0, dp = (u_char *)m->m_data;
1206 WrByteALToDRAMA(sc, *dp);
1210 * restore old mbuf in case we have to hand it off to
1217 /* the RTL 8002 requires an even byte-count remote DMA */
1219 WrByteALToDRAMA(sc, 0);
1221 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1223 for (i = 0, dp = (u_char *)m->m_data;
1226 WrByteALToDRAM(sc, *dp);
1230 /* the RTL 8002 requires an even byte-count remote DMA */
1232 WrByteALToDRAM(sc, 0);
1235 outb(sc->baseaddr + lpt_data, 0xff);
1236 outb(sc->baseaddr + lpt_control,
1237 Ctrl_HNibRead | Ctrl_SelData | sc->irqenbit);
1243 * Read the designated ethernet hardware address out of a 93C46
1245 * Note that the 93C46 uses 16-bit words in big-endian notation.
1248 rdp_gethwaddr_93c46(struct rdp_softc *sc, u_char *etheraddr)
1254 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1257 * The original RealTek packet driver had the ethernet address
1258 * starting at EEPROM address 0. Other vendors seem to have
1259 * gone `creative' here -- while they didn't do anything else
1260 * than changing a few strings in the entire driver, compared
1261 * to the RealTek version, they also moved out the ethernet
1262 * address to a different location in the EEPROM, so the
1263 * original RealTek driver won't work correctly with them, and
1264 * vice versa. Sounds pretty cool, eh? $@%&!
1266 * Anyway, we walk through the EEPROM, until we find some
1267 * allowable value based upon our table of IEEE OUI assignments.
1269 for (i = magic = 0; magic < 3 && i < 32; i++) {
1270 /* read cmd (+ 6 bit address) */
1271 rdp_93c46_cmd(sc, 0x180 + i, 10);
1272 w = rdp_93c46_read(sc);
1276 j < sizeof allowed_ouis / sizeof(u_short);
1278 if (w == allowed_ouis[j]) {
1279 etheraddr[0] = (w >> 8) & 0xff;
1280 etheraddr[1] = w & 0xff;
1288 * If the first two bytes have been 00:00, we
1289 * discard the match iff the next two bytes
1290 * are also 00:00, so we won't get fooled by
1291 * an EEPROM that has been filled with zeros.
1292 * This in theory would disallow 64 K of legal
1293 * addresses assigned to Xerox, but it's
1294 * almost certain that those addresses haven't
1295 * been used for RTL80[01]2 chips anyway.
1297 if ((etheraddr[0] | etheraddr[1]) == 0 && w == 0) {
1302 etheraddr[2] = (w >> 8) & 0xff;
1303 etheraddr[3] = w & 0xff;
1308 etheraddr[4] = (w >> 8) & 0xff;
1309 etheraddr[5] = w & 0xff;
1315 WrNib(sc, CMR2, CMR2_IRQINV); /* back to page 0 */
1321 * Read the designated ethernet hardware address out of a 74S288
1324 * This is untested, since i haven't seen any adapter actually using
1325 * a 74S288. In the RTL 8012, only the serial EEPROM (94C46) is
1326 * supported anymore.
1329 rdp_gethwaddr_74s288(struct rdp_softc *sc, u_char *etheraddr)
1334 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1336 for (i = 0; i < 6; i++) {
1337 WrNib(sc, PCMR, i & 0x0f); /* lower 4 bit of addr */
1338 WrNib(sc, PCMR + HNib, HNib + 4); /* upper 2 bit addr + /CS */
1339 WrNib(sc, PCMR + HNib, HNib); /* latch data now */
1340 b = RdNib(sc, PDR) & 0x0f;
1341 b |= (RdNib(sc, PDR + HNib) & 0x0f) << 4;
1345 RdEnd(sc, PDR + HNib);
1346 WrNib(sc, CMR2, CMR2_IRQINV); /* reselect page 0 */
1350 * Send nbits of data (starting with MSB) out to the 93c46 as a
1351 * command. Assumes register page 1 has already been selected.
1354 rdp_93c46_cmd(struct rdp_softc *sc, u_short data, unsigned nbits)
1356 u_short mask = 1 << (nbits - 1);
1361 printf("rdp_93c46_cmd(): ");
1363 for (i = 0; i < nbits; i++, mask >>= 1) {
1364 b = HNib + PCMR_SK + PCMR_CS;
1368 printf("%d", b & 1);
1370 WrNib(sc, PCMR + HNib, b);
1372 WrNib(sc, PCMR + HNib, b & ~PCMR_SK);
1381 * Read one word of data from the 93c46. Actually, we have to read
1382 * 17 bits, and discard the very first bit. Assumes register page 1
1383 * to be selected as well.
1386 rdp_93c46_read(struct rdp_softc *sc)
1393 printf("rdp_93c46_read(): ");
1395 for (i = 0; i < 17; i++) {
1396 WrNib(sc, PCMR + HNib, PCMR_SK + PCMR_CS + HNib);
1398 WrNib(sc, PCMR + HNib, PCMR_CS + HNib);
1405 printf("%d", b & 1);
1415 WrNib(sc, PCMR + HNib, PCMR_SK + HNib);