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 1.12 2004/07/23 07:16:27 joerg 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>
79 #include <net/ethernet.h>
81 #include <net/if_arp.h>
82 #include <net/if_dl.h>
83 #include <net/if_mib.h>
86 #include <netinet/in.h>
87 #include <netinet/if_ether.h>
92 #include <netns/ns_if.h>
97 #include <machine/clock.h>
98 #include <machine/md_var.h>
100 #include <bus/isa/isavar.h>
101 #include <bus/isa/i386/isa_device.h>
102 #include <i386/isa/icu.h>
103 #include "if_rdpreg.h"
104 #include <i386/isa/intr_machdep.h>
106 #define IOCTL_CMD_T u_long
109 * Debug levels (ORed together):
110 * != 0 - general (bad packets etc.)
111 * 2 - debug EEPROM IO
112 * 4 - debug interrupt status
118 * rdp_softc: per interface info and status
121 struct arpcom arpcom; /*
122 * Ethernet common, always goes first so
123 * a rdp_softc * can be cast into an
124 * arpcom * or into an ifnet *.
128 * local stuff, somewhat sorted by memory alignment class
130 u_short baseaddr; /* IO port address */
131 u_short txsize; /* tx size for next (buffered) packet,
132 * there's only one additional packet
133 * we can buffer, thus a single variable
134 * ought to be enough */
135 int txbusy; /* tx is transmitting */
136 int txbuffered; /* # of packets in tx buffer */
137 int slow; /* use lpt_control to send data */
138 u_char irqenbit; /* mirror of current Ctrl_IRQEN */
140 * type of parameter EEPROM; device flags 0x1 selects 74S288
143 EEPROM_93C46, EEPROM_74S288 /* or 82S123 */
147 DECLARE_DUMMY_MODULE(if_rdp);
149 static struct rdp_softc rdp_softc[NRDP];
152 * Since there's no fixed location in the EEPROM about where to find
153 * the ethernet hardware address, we drop a table of valid OUIs here,
154 * and search through the EEPROM until we find a possible valid
155 * Ethernet address. Only the first 16 bits of all possible OUIs are
156 * recorded in the table (as obtained from
157 * http://standards.ieee.org/regauth/oui/oui.txt).
160 static u_short allowed_ouis[] = {
161 0x0000, 0x0001, 0x0002, 0x0004, 0x0005, 0x0006, 0x0007,
162 0x0008, 0x0010, 0x001C, 0x0020, 0x0040, 0x0050, 0x0060,
163 0x0070, 0x0080, 0x0090, 0x009D, 0x00A0, 0x00AA, 0x00BB,
164 0x00C0, 0x00CF, 0x00DD, 0x00E0, 0x00E6, 0x0207, 0x021C,
165 0x0260, 0x0270, 0x029D, 0x02AA, 0x02BB, 0x02C0, 0x02CF,
166 0x02E6, 0x040A, 0x04E0, 0x0800, 0x08BB, 0x1000, 0x1100,
173 static int rdp_probe (struct isa_device *);
174 static int rdp_attach (struct isa_device *);
177 * Required entry points.
179 static void rdp_init(void *);
180 static int rdp_ioctl(struct ifnet *, IOCTL_CMD_T, caddr_t, struct ucred *);
181 static void rdp_start(struct ifnet *);
182 static void rdp_reset(struct ifnet *);
183 static void rdp_watchdog(struct ifnet *);
184 static void rdpintr(int);
187 * REDP private functions.
190 static void rdp_stop(struct rdp_softc *);
191 static void rdp_rint(struct rdp_softc *);
192 static void rdp_get_packet(struct rdp_softc *, unsigned);
193 static u_short rdp_write_mbufs(struct rdp_softc *, struct mbuf *);
194 static int rdp_gethwaddr_93c46(struct rdp_softc *, u_char *);
195 static void rdp_gethwaddr_74s288(struct rdp_softc *, u_char *);
196 static void rdp_93c46_cmd(struct rdp_softc *, u_short, unsigned);
197 static u_short rdp_93c46_read(struct rdp_softc *);
199 struct isa_driver rdpdriver = {
203 1 /* we wanna get a chance before lptN */
207 * REDP-specific functions.
209 * They are inlined, thus go first in this file. Together with gcc's
210 * usual optimization, these functions probably come close to the
211 * packet driver's hand-optimized code. ;-)
213 * Comments are partially obtained from the packet driver as well.
214 * Some of the function names contain register names which don't make
215 * much sense for us, but i've kept them for easier reference in
216 * comparision to the packet driver.
218 * Some of the functions are currently not used by the driver; it's
219 * not quite clear whether we ever need them at all. They are
220 * supposedly even slower than what is currently implemented as `slow'
221 * mode. Right now, `fast' (default) mode is what the packet driver
222 * calls mode 0, slow mode is mode 3 (writing through lpt_control,
225 * We should autoprobe the modi, as opposed to making them dependent
226 * on a kernel configuration flag.
230 * read a nibble from rreg; end-of-data cmd is not issued;
231 * used for general register read.
233 * Unlike the packet driver's version, i'm shifting the result
234 * by 3 here (as opposed to within the caller's code) for clarity.
237 static __inline u_char
238 RdNib(struct rdp_softc *sc, u_char rreg)
241 outb(sc->baseaddr + lpt_data, EOC + rreg);
242 outb(sc->baseaddr + lpt_data, RdAddr + rreg); /* write addr */
243 (void)inb(sc->baseaddr + lpt_status);
244 return (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
249 * read a byte from MAR register through lpt_data; the low nibble is
250 * read prior to the high one; end-of-read command is not issued; used
251 * for remote DMA in mode 4 + 5
253 static __inline u_char
254 RdByte(struct rdp_softc *sc)
258 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
259 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
260 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
261 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
262 return hinib + lonib;
267 * read a byte from MAR register through lpt_data; the low nibble is
268 * read prior to the high one; end-of-read command is not issued; used
269 * for remote DMA in mode 6 + 7
271 static __inline u_char
272 RdByte1(struct rdp_softc *sc)
276 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
277 (void)inb(sc->baseaddr + lpt_status);
278 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
279 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
280 (void)inb(sc->baseaddr + lpt_status);
281 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
282 return hinib + lonib;
288 * read a byte from MAR register through lpt_control; the low nibble is
289 * read prior to the high one; end-of-read command is not issued; used
290 * for remote DMA in mode 0 + 1
292 static __inline u_char
293 RdByteA1(struct rdp_softc *sc)
297 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
298 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
299 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
300 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
301 return hinib + lonib;
306 * read a byte from MAR register through lpt_control; the low nibble is
307 * read prior to the high one; end-of-read command is not issued; used
308 * for remote DMA in mode 2 + 3
310 static __inline u_char
311 RdByteA2(struct rdp_softc *sc)
315 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
316 (void)inb(sc->baseaddr + lpt_status);
317 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
318 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
319 (void)inb(sc->baseaddr + lpt_status);
320 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
321 return hinib + lonib;
328 RdEnd(struct rdp_softc *sc, u_char rreg)
331 outb(sc->baseaddr + lpt_data, EOC + rreg);
335 * Write a nibble to a register; end-of-write is issued.
336 * Used for general register write.
339 WrNib(struct rdp_softc *sc, u_char wreg, u_char wdata)
342 /* prepare and write address */
343 outb(sc->baseaddr + lpt_data, EOC + wreg);
344 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
345 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
346 /* prepare and write data */
347 outb(sc->baseaddr + lpt_data, WrAddr + wdata);
348 outb(sc->baseaddr + lpt_data, wdata);
349 outb(sc->baseaddr + lpt_data, wdata);
351 outb(sc->baseaddr + lpt_data, EOC + wdata);
355 * Write a byte to a register; end-of-write is issued.
356 * Used for general register write.
359 WrByte(struct rdp_softc *sc, u_char wreg, u_char wdata)
362 /* prepare and write address */
363 outb(sc->baseaddr + lpt_data, EOC + wreg);
364 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
365 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
366 /* prepare and write low nibble */
367 outb(sc->baseaddr + lpt_data, WrAddr + (wdata & 0x0F));
368 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
369 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
370 /* prepare and write high nibble */
372 outb(sc->baseaddr + lpt_data, wdata);
373 outb(sc->baseaddr + lpt_data, wdata + HNib);
374 outb(sc->baseaddr + lpt_data, wdata + HNib);
376 outb(sc->baseaddr + lpt_data, EOC + wdata + HNib);
380 * Write the byte to DRAM via lpt_data;
381 * used for remote DMA write in mode 0 / 2 / 4
384 WrByteALToDRAM(struct rdp_softc *sc, u_char val)
387 outb(sc->baseaddr + lpt_data, val & 0x0F);
388 outb(sc->baseaddr + lpt_data, MkHi(val));
392 * Write the byte to DRAM via lpt_control;
393 * used for remote DMA write in mode 1 / 3 / 5
396 WrByteALToDRAMA(struct rdp_softc *sc, u_char val)
399 outb(sc->baseaddr + lpt_data, val & 0x0F);
400 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
401 outb(sc->baseaddr + lpt_data, val >> 4);
402 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
405 #if 0 /* they could be used for the RAM test */
407 * Write the u_short to DRAM via lpt_data;
408 * used for remote DMA write in mode 0 / 2 / 4
411 WrWordbxToDRAM(struct rdp_softc *sc, u_short val)
414 outb(sc->baseaddr + lpt_data, val & 0x0F);
416 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
418 outb(sc->baseaddr + lpt_data, val & 0x0F);
420 outb(sc->baseaddr + lpt_data, val + HNib);
425 * Write the u_short to DRAM via lpt_control;
426 * used for remote DMA write in mode 1 / 3 / 5
429 WrWordbxToDRAMA(struct rdp_softc *sc, u_short val)
432 outb(sc->baseaddr + lpt_data, val & 0x0F);
433 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
435 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
436 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
438 outb(sc->baseaddr + lpt_data, val & 0x0F);
439 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
441 outb(sc->baseaddr + lpt_data, val + HNib);
442 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
448 * Determine if the device is present
451 * a pointer to an isa_device struct
453 * 0 if device not found
454 * or # of i/o addresses used (if found)
457 rdp_probe(struct isa_device *isa_dev)
459 int unit = isa_dev->id_unit;
460 struct rdp_softc *sc = &rdp_softc[unit];
462 intrmask_t irqmap[3];
465 if (unit < 0 || unit >= NRDP)
468 sc->baseaddr = isa_dev->id_iobase;
469 if (isa_dev->id_flags & 1)
470 sc->eeprom = EEPROM_74S288;
471 /* else defaults to 93C46 */
472 if (isa_dev->id_flags & 2)
475 /* let R/WB = A/DB = CSB = high to be ready for next r/w cycle */
476 outb(sc->baseaddr + lpt_data, 0xFF);
477 /* DIR = 0 for write mode, IRQEN=0, SLCT=INIT=AUTOFEED=STB=high */
478 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
480 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
483 b1 = RdNib(sc, CMR1);
485 b2 = RdNib(sc, CMR2) & 0x0f;
486 b2 |= RdNib(sc, CMR2 + HNib) << 4;
487 RdEnd(sc, CMR2 + HNib);
489 * After the reset, we expect CMR1 & 7 to be 1 (rx buffer empty),
490 * and CMR2 & 0xf7 to be 0x20 (receive mode set to physical and
494 printf("rdp%d: CMR1 = %#x, CMR2 = %#x\n", unit, b1, b2);
496 if ((b1 & (CMR1_BUFE | CMR1_IRQ | CMR1_TRA)) != CMR1_BUFE
497 || (b2 & ~CMR2_IRQINV) != CMR2_AM_PB)
501 * We have found something that could be a RTL 80[01]2, now
502 * see whether we can generate an interrupt.
507 * Test whether our configured IRQ is working.
509 * Set to no acception mode + IRQout, then enable RxE + TxE,
510 * then cause RBER (by advancing the read pointer although
511 * the read buffer is empty) to generate an interrupt.
513 WrByte(sc, CMR2, CMR2_IRQOUT);
514 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
515 WrNib(sc, CMR1, CMR1_RDPAC);
518 irqmap[0] = isa_irq_pending();
519 sval[0] = inb(sc->baseaddr + lpt_status);
521 /* allow IRQs to pass the parallel interface */
522 outb(sc->baseaddr + lpt_control, Ctrl_IRQEN + Ctrl_SelData);
524 /* generate interrupt */
525 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
528 irqmap[1] = isa_irq_pending();
529 sval[1] = inb(sc->baseaddr + lpt_status);
531 /* de-assert and disable IRQ */
532 WrNib(sc, IMR + HNib, MkHi(0));
533 (void)inb(sc->baseaddr + lpt_status); /* might be necessary to
536 irqmap[2] = isa_irq_pending();
537 sval[2] = inb(sc->baseaddr + lpt_status);
539 WrNib(sc, CMR1 + HNib, MkHi(0));
540 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
541 WrNib(sc, CMR2, CMR2_IRQINV);
546 printf("rdp%d: irq maps / lpt status "
547 "%#x/%#x - %#x/%#x - %#x/%#x (id_irq %#x)\n",
548 unit, irqmap[0], sval[0], irqmap[1], sval[1],
549 irqmap[2], sval[2], isa_dev->id_irq);
551 if ((irqmap[1] & isa_dev->id_irq) == 0) {
552 printf("rdp%d: configured IRQ (%d) cannot be asserted "
554 unit, ffs(isa_dev->id_irq) - 1);
556 printf(" (probable IRQ: %d)", ffs(irqmap[1]) - 1);
562 * XXX should do RAMtest here
565 switch (sc->eeprom) {
567 if (rdp_gethwaddr_93c46(sc, sc->arpcom.ac_enaddr) == 0) {
568 printf("rdp%d: failed to find a valid hardware "
569 "address in EEPROM\n",
576 rdp_gethwaddr_74s288(sc, sc->arpcom.ac_enaddr);
580 return lpt_control + 1;
584 * Install interface into kernel networking data structures
587 rdp_attach(struct isa_device *isa_dev)
589 int unit = isa_dev->id_unit;
590 struct rdp_softc *sc = &rdp_softc[unit];
591 struct ifnet *ifp = &sc->arpcom.ac_if;
593 isa_dev->id_ointr = rdpintr;
601 * Initialize ifnet structure
604 if_initname(ifp, "rdp", unit);
605 ifp->if_start = rdp_start;
606 ifp->if_ioctl = rdp_ioctl;
607 ifp->if_watchdog = rdp_watchdog;
608 ifp->if_init = rdp_init;
609 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
610 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
613 * Attach the interface
615 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
618 * Print additional info when attached
620 printf("%s: RealTek RTL%s pocket ethernet, EEPROM %s, %s mode\n",
622 "8002", /* hook for 8012 */
623 sc->eeprom == EEPROM_93C46? "93C46": "74S288",
624 sc->slow? "slow": "fast");
633 rdp_reset(struct ifnet *ifp)
635 struct rdp_softc *sc = ifp->if_softc;
641 * Stop interface and re-initialize.
650 * Take interface offline.
653 rdp_stop(struct rdp_softc *sc)
656 sc->txbusy = sc->txbusy = 0;
658 /* disable printer interface interrupts */
660 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
661 outb(sc->baseaddr + lpt_data, 0xff);
663 /* reset the RTL 8002 */
664 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
669 * Device timeout/watchdog routine. Entered if the device neglects to
670 * generate an interrupt after a transmit has been started on it.
673 rdp_watchdog(struct ifnet *ifp)
676 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
688 struct rdp_softc *sc = xsc;
689 struct ifnet *ifp = &sc->arpcom.ac_if;
693 /* address not known */
694 if (TAILQ_EMPTY(&ifp->if_addrhead))
701 /* program ethernet ID into the chip */
702 for (i = 0, reg = IDR0; i < 6; i++, reg++)
703 WrByte(sc, reg, sc->arpcom.ac_enaddr[i]);
705 /* set accept mode */
706 WrNib(sc, CMR2 + HNib,
707 MkHi((ifp->if_flags & IFF_PROMISC)? CMR2_AM_ALL: CMR2_AM_PB));
709 /* enable tx and rx */
710 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
712 /* allow interrupts to happen */
713 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
714 WrNib(sc, IMR, ISR_TOK | ISR_TER | ISR_ROK | ISR_RER);
715 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
717 /* allow IRQs to pass the parallel interface */
718 sc->irqenbit = Ctrl_IRQEN;
719 outb(sc->baseaddr + lpt_control, sc->irqenbit + Ctrl_SelData);
721 /* clear all flags */
722 sc->txbusy = sc->txbuffered = 0;
725 * Set 'running' flag, and clear output active flag.
727 ifp->if_flags |= IFF_RUNNING;
728 ifp->if_flags &= ~IFF_OACTIVE;
731 * ...and attempt to start output
739 * Start output on interface.
740 * We make two assumptions here:
741 * 1) that the current priority is set to splimp _before_ this code
742 * is called *and* is returned to the appropriate priority after
744 * 2) that the IFF_OACTIVE flag is checked before this code is called
745 * (i.e. that the output part of the interface is idle)
748 rdp_start(struct ifnet *ifp)
750 struct rdp_softc *sc = ifp->if_softc;
757 * See if there is room to put another packet in the buffer.
759 if (sc->txbuffered) {
761 * No room. Indicate this to the outside world and exit.
763 ifp->if_flags |= IFF_OACTIVE;
766 IF_DEQUEUE(&ifp->if_snd, m);
769 * We are using the !OACTIVE flag to indicate to the outside
770 * world that we can accept an additional packet rather than
771 * that the transmitter is _actually_ active. Indeed, the
772 * transmitter may be active, but if we haven't filled all the
773 * buffers with data then we still want to accept more.
775 ifp->if_flags &= ~IFF_OACTIVE;
780 * Copy the mbuf chain into the transmit buffer
783 len = rdp_write_mbufs(sc, m);
787 /* ensure minimal valid ethernet length */
788 len = max(len, (ETHER_MIN_LEN-ETHER_CRC_LEN));
791 * Actually start the transceiver. Set a timeout in case the
792 * Tx interrupt never arrives.
795 WrNib(sc, TBCR1, len >> 8);
796 WrByte(sc, TBCR0, len & 0xff);
797 WrNib(sc, CMR1, CMR1_TRA);
806 * Tap off here if there is a bpf listener.
815 * Loop back to the top to possibly buffer more packets
821 * Process an ioctl request.
824 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 ifnet *ifp = &sc->arpcom.ac_if;
1105 /* Allocate a header mbuf */
1106 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1109 m->m_pkthdr.rcvif = ifp;
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, MB_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.
1136 * Get packet, including link layer address, from interface.
1138 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1139 outb(sc->baseaddr + lpt_data, RdAddr + MAR);
1141 packet_ptr = mtod(m, u_char *);
1143 for (s = 0; s < len; s++, packet_ptr++)
1144 *packet_ptr = RdByteA2(sc);
1146 for (s = 0; s < len; s++, packet_ptr++)
1147 *packet_ptr = RdByteA1(sc);
1149 RdEnd(sc, MAR + HNib);
1150 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1151 WrNib(sc, CMR1, CMR1_RDPAC);
1153 (*ifp->if_input)(ifp, m);
1157 * Write an mbuf chain to the NIC's tx buffer.
1160 rdp_write_mbufs(struct rdp_softc *sc, struct mbuf *m)
1167 /* First, count up the total number of bytes to copy */
1168 for (total_len = 0, mp = m; mp; mp = mp->m_next)
1169 total_len += mp->m_len;
1174 outb(sc->baseaddr + lpt_data, MAR | EOC);
1177 * Transfer the mbuf chain to the NIC memory.
1180 /* writing the first byte is complicated */
1181 outb(sc->baseaddr + lpt_control,
1182 Ctrl_LNibRead | sc->irqenbit);
1183 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1184 b = *(u_char *)m->m_data;
1185 outb(sc->baseaddr + lpt_data, (b & 0x0f) | 0x40);
1186 outb(sc->baseaddr + lpt_data, b & 0x0f);
1187 outb(sc->baseaddr + lpt_data, b >> 4);
1188 outb(sc->baseaddr + lpt_control,
1189 Ctrl_HNibRead | sc->irqenbit);
1190 /* advance the mbuf pointer */
1194 /* write the remaining bytes */
1196 for (i = 0, dp = (u_char *)m->m_data;
1199 WrByteALToDRAMA(sc, *dp);
1203 * restore old mbuf in case we have to hand it off to
1210 /* the RTL 8002 requires an even byte-count remote DMA */
1212 WrByteALToDRAMA(sc, 0);
1214 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1216 for (i = 0, dp = (u_char *)m->m_data;
1219 WrByteALToDRAM(sc, *dp);
1223 /* the RTL 8002 requires an even byte-count remote DMA */
1225 WrByteALToDRAM(sc, 0);
1228 outb(sc->baseaddr + lpt_data, 0xff);
1229 outb(sc->baseaddr + lpt_control,
1230 Ctrl_HNibRead | Ctrl_SelData | sc->irqenbit);
1236 * Read the designated ethernet hardware address out of a 93C46
1238 * Note that the 93C46 uses 16-bit words in big-endian notation.
1241 rdp_gethwaddr_93c46(struct rdp_softc *sc, u_char *etheraddr)
1247 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1250 * The original RealTek packet driver had the ethernet address
1251 * starting at EEPROM address 0. Other vendors seem to have
1252 * gone `creative' here -- while they didn't do anything else
1253 * than changing a few strings in the entire driver, compared
1254 * to the RealTek version, they also moved out the ethernet
1255 * address to a different location in the EEPROM, so the
1256 * original RealTek driver won't work correctly with them, and
1257 * vice versa. Sounds pretty cool, eh? $@%&!
1259 * Anyway, we walk through the EEPROM, until we find some
1260 * allowable value based upon our table of IEEE OUI assignments.
1262 for (i = magic = 0; magic < 3 && i < 32; i++) {
1263 /* read cmd (+ 6 bit address) */
1264 rdp_93c46_cmd(sc, 0x180 + i, 10);
1265 w = rdp_93c46_read(sc);
1269 j < sizeof allowed_ouis / sizeof(u_short);
1271 if (w == allowed_ouis[j]) {
1272 etheraddr[0] = (w >> 8) & 0xff;
1273 etheraddr[1] = w & 0xff;
1281 * If the first two bytes have been 00:00, we
1282 * discard the match iff the next two bytes
1283 * are also 00:00, so we won't get fooled by
1284 * an EEPROM that has been filled with zeros.
1285 * This in theory would disallow 64 K of legal
1286 * addresses assigned to Xerox, but it's
1287 * almost certain that those addresses haven't
1288 * been used for RTL80[01]2 chips anyway.
1290 if ((etheraddr[0] | etheraddr[1]) == 0 && w == 0) {
1295 etheraddr[2] = (w >> 8) & 0xff;
1296 etheraddr[3] = w & 0xff;
1301 etheraddr[4] = (w >> 8) & 0xff;
1302 etheraddr[5] = w & 0xff;
1308 WrNib(sc, CMR2, CMR2_IRQINV); /* back to page 0 */
1314 * Read the designated ethernet hardware address out of a 74S288
1317 * This is untested, since i haven't seen any adapter actually using
1318 * a 74S288. In the RTL 8012, only the serial EEPROM (94C46) is
1319 * supported anymore.
1322 rdp_gethwaddr_74s288(struct rdp_softc *sc, u_char *etheraddr)
1327 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1329 for (i = 0; i < 6; i++) {
1330 WrNib(sc, PCMR, i & 0x0f); /* lower 4 bit of addr */
1331 WrNib(sc, PCMR + HNib, HNib + 4); /* upper 2 bit addr + /CS */
1332 WrNib(sc, PCMR + HNib, HNib); /* latch data now */
1333 b = RdNib(sc, PDR) & 0x0f;
1334 b |= (RdNib(sc, PDR + HNib) & 0x0f) << 4;
1338 RdEnd(sc, PDR + HNib);
1339 WrNib(sc, CMR2, CMR2_IRQINV); /* reselect page 0 */
1343 * Send nbits of data (starting with MSB) out to the 93c46 as a
1344 * command. Assumes register page 1 has already been selected.
1347 rdp_93c46_cmd(struct rdp_softc *sc, u_short data, unsigned nbits)
1349 u_short mask = 1 << (nbits - 1);
1354 printf("rdp_93c46_cmd(): ");
1356 for (i = 0; i < nbits; i++, mask >>= 1) {
1357 b = HNib + PCMR_SK + PCMR_CS;
1361 printf("%d", b & 1);
1363 WrNib(sc, PCMR + HNib, b);
1365 WrNib(sc, PCMR + HNib, b & ~PCMR_SK);
1374 * Read one word of data from the 93c46. Actually, we have to read
1375 * 17 bits, and discard the very first bit. Assumes register page 1
1376 * to be selected as well.
1379 rdp_93c46_read(struct rdp_softc *sc)
1386 printf("rdp_93c46_read(): ");
1388 for (i = 0; i < 17; i++) {
1389 WrNib(sc, PCMR + HNib, PCMR_SK + PCMR_CS + HNib);
1391 WrNib(sc, PCMR + HNib, PCMR_CS + HNib);
1398 printf("%d", b & 1);
1408 WrNib(sc, PCMR + HNib, PCMR_SK + HNib);