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 1.10 2004/06/02 14:42:54 eirikn 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_output = ether_output;
606 ifp->if_start = rdp_start;
607 ifp->if_ioctl = rdp_ioctl;
608 ifp->if_watchdog = rdp_watchdog;
609 ifp->if_init = rdp_init;
610 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
611 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
614 * Attach the interface
616 ether_ifattach(ifp, sc->arpcom.ac_enaddr);
619 * Print additional info when attached
621 printf("%s: RealTek RTL%s pocket ethernet, EEPROM %s, %s mode\n",
623 "8002", /* hook for 8012 */
624 sc->eeprom == EEPROM_93C46? "93C46": "74S288",
625 sc->slow? "slow": "fast");
626 printf("%s: address %6D\n", ifp->if_xname,
627 sc->arpcom.ac_enaddr, ":");
636 rdp_reset(struct ifnet *ifp)
638 struct rdp_softc *sc = ifp->if_softc;
644 * Stop interface and re-initialize.
653 * Take interface offline.
656 rdp_stop(struct rdp_softc *sc)
659 sc->txbusy = sc->txbusy = 0;
661 /* disable printer interface interrupts */
663 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
664 outb(sc->baseaddr + lpt_data, 0xff);
666 /* reset the RTL 8002 */
667 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
672 * Device timeout/watchdog routine. Entered if the device neglects to
673 * generate an interrupt after a transmit has been started on it.
676 rdp_watchdog(struct ifnet *ifp)
679 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
691 struct rdp_softc *sc = xsc;
692 struct ifnet *ifp = &sc->arpcom.ac_if;
696 /* address not known */
697 if (TAILQ_EMPTY(&ifp->if_addrhead))
704 /* program ethernet ID into the chip */
705 for (i = 0, reg = IDR0; i < 6; i++, reg++)
706 WrByte(sc, reg, sc->arpcom.ac_enaddr[i]);
708 /* set accept mode */
709 WrNib(sc, CMR2 + HNib,
710 MkHi((ifp->if_flags & IFF_PROMISC)? CMR2_AM_ALL: CMR2_AM_PB));
712 /* enable tx and rx */
713 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
715 /* allow interrupts to happen */
716 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
717 WrNib(sc, IMR, ISR_TOK | ISR_TER | ISR_ROK | ISR_RER);
718 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
720 /* allow IRQs to pass the parallel interface */
721 sc->irqenbit = Ctrl_IRQEN;
722 outb(sc->baseaddr + lpt_control, sc->irqenbit + Ctrl_SelData);
724 /* clear all flags */
725 sc->txbusy = sc->txbuffered = 0;
728 * Set 'running' flag, and clear output active flag.
730 ifp->if_flags |= IFF_RUNNING;
731 ifp->if_flags &= ~IFF_OACTIVE;
734 * ...and attempt to start output
742 * Start output on interface.
743 * We make two assumptions here:
744 * 1) that the current priority is set to splimp _before_ this code
745 * is called *and* is returned to the appropriate priority after
747 * 2) that the IFF_OACTIVE flag is checked before this code is called
748 * (i.e. that the output part of the interface is idle)
751 rdp_start(struct ifnet *ifp)
753 struct rdp_softc *sc = ifp->if_softc;
760 * See if there is room to put another packet in the buffer.
762 if (sc->txbuffered) {
764 * No room. Indicate this to the outside world and exit.
766 ifp->if_flags |= IFF_OACTIVE;
769 IF_DEQUEUE(&ifp->if_snd, m);
772 * We are using the !OACTIVE flag to indicate to the outside
773 * world that we can accept an additional packet rather than
774 * that the transmitter is _actually_ active. Indeed, the
775 * transmitter may be active, but if we haven't filled all the
776 * buffers with data then we still want to accept more.
778 ifp->if_flags &= ~IFF_OACTIVE;
783 * Copy the mbuf chain into the transmit buffer
786 len = rdp_write_mbufs(sc, m);
790 /* ensure minimal valid ethernet length */
791 len = max(len, (ETHER_MIN_LEN-ETHER_CRC_LEN));
794 * Actually start the transceiver. Set a timeout in case the
795 * Tx interrupt never arrives.
798 WrNib(sc, TBCR1, len >> 8);
799 WrByte(sc, TBCR0, len & 0xff);
800 WrNib(sc, CMR1, CMR1_TRA);
809 * Tap off here if there is a bpf listener.
818 * Loop back to the top to possibly buffer more packets
824 * Process an ioctl request.
827 rdp_ioctl(struct ifnet *ifp, IOCTL_CMD_T command, caddr_t data,
830 struct rdp_softc *sc = ifp->if_softc;
840 error = ether_ioctl(ifp, command, data);
845 * If the interface is marked up and stopped, then start it.
846 * If it is marked down and running, then stop it.
848 if (ifp->if_flags & IFF_UP) {
849 if ((ifp->if_flags & IFF_RUNNING) == 0)
852 if (ifp->if_flags & IFF_RUNNING) {
854 ifp->if_flags &= ~IFF_RUNNING;
859 * Promiscuous flag may have changed, propagage this
862 if (ifp->if_flags & IFF_UP)
863 WrNib(sc, CMR2 + HNib,
864 MkHi((ifp->if_flags & IFF_PROMISC)?
865 CMR2_AM_ALL: CMR2_AM_PB));
872 * Multicast list has changed; we don't support it.
885 * External interrupt service routine.
890 struct rdp_softc *sc = rdp_softc + unit;
891 struct ifnet *ifp = (struct ifnet *)sc;
892 u_char isr, tsr, rsr, colls;
894 /* disable interrupts, so SD3 can be routed to the pin */
896 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
897 WrNib(sc, CMR2, CMR2_IRQINV);
899 * loop until there are no more new interrupts
902 isr = RdNib(sc, ISR);
903 isr |= RdNib(sc, ISR + HNib) << 4;
904 RdEnd(sc, ISR + HNib);
909 printf("rdp%d: ISR = %#x\n", unit, isr);
913 * Clear the pending interrupt bits.
915 WrNib(sc, ISR, isr & 0x0f);
917 WrNib(sc, ISR + HNib, MkHi(isr));
920 * Handle transmitter interrupts.
922 if (isr & (ISR_TOK | ISR_TER)) {
923 tsr = RdNib(sc, TSR);
927 printf("rdp%d: tsr %#x\n", unit, tsr);
933 * Update total number of successfully
934 * transmitted packets.
939 colls = RdNib(sc, COLR);
941 ifp->if_collisions += colls;
945 * reset tx busy and output active flags
948 ifp->if_flags &= ~IFF_OACTIVE;
951 * If we had already queued up another packet,
952 * start sending it now.
954 if (sc->txbuffered) {
955 WrNib(sc, TBCR1, sc->txsize >> 8);
956 WrByte(sc, TBCR0, sc->txsize & 0xff);
957 WrNib(sc, CMR1, CMR1_TRA);
963 * clear watchdog timer
971 * Handle receiver interrupts
973 if (isr & (ISR_ROK | ISR_RER | ISR_RBER)) {
974 rsr = RdNib(sc, RSR);
975 rsr |= RdNib(sc, RSR + HNib) << 4;
976 RdEnd(sc, RSR + HNib);
978 if (isr & (ISR_RER | ISR_RBER))
979 printf("rdp%d: rsr %#x\n", unit, rsr);
982 if (rsr & (RSR_PUN | RSR_POV)) {
983 printf("rdp%d: rsr %#x, resetting\n",
991 * CRC and FA errors are recorded in
992 * rdp_rint() on a per-packet basis
995 if (isr & (ISR_ROK | ISR_RER))
1000 * If it looks like the transmitter can take more data,
1001 * attempt to start output on the interface. This is done
1002 * after handling the receiver to give the receiver priority.
1004 if ((ifp->if_flags & IFF_OACTIVE) == 0)
1008 /* re-enable interrupts */
1009 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
1010 sc->irqenbit = Ctrl_IRQEN;
1011 outb(sc->baseaddr + lpt_control, Ctrl_SelData + sc->irqenbit);
1015 * Ethernet interface receiver interrupt.
1018 rdp_rint(struct rdp_softc *sc)
1020 struct ifnet *ifp = &sc->arpcom.ac_if;
1024 u_char *packet_ptr, b, status;
1025 int excessive_bad_pkts = 0;
1028 * Fetch the packets from the NIC's buffer.
1031 b = RdNib(sc, CMR1);
1035 /* no more packets */
1038 /* first, obtain the buffer header */
1040 outb(sc->baseaddr + lpt_data, MAR + EOC); /* prepare addr */
1041 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1042 outb(sc->baseaddr + lpt_data, MAR + RdAddr + HNib);
1044 packet_ptr = (u_char *)&rh;
1046 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1047 *packet_ptr = RdByteA2(sc);
1049 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1050 *packet_ptr = RdByteA1(sc);
1052 RdEnd(sc, MAR + HNib);
1053 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1055 len = rh.pktlen - ETHER_CRC_LEN;
1058 if ((status & (RSR_ROK | RSR_CRC | RSR_FA)) != RSR_ROK ||
1059 len > (ETHER_MAX_LEN - ETHER_CRC_LEN) ||
1060 len < (ETHER_MIN_LEN - ETHER_CRC_LEN) ||
1063 printf("%s: bad packet in buffer, "
1064 "len %d, status %#x\n",
1065 ifp->if_xname, (int)len, (int)status);
1068 /* rx jump packet */
1069 WrNib(sc, CMR1, CMR1_RDPAC);
1070 if (++excessive_bad_pkts > 5) {
1072 * the chip seems to be stuck, we are
1073 * probably seeing the same bad packet
1074 * over and over again
1077 printf("%s: resetting due to an "
1078 "excessive number of bad packets\n",
1090 excessive_bad_pkts = 0;
1091 rdp_get_packet(sc, len);
1097 * Retreive packet from NIC memory and send to the next level up via
1101 rdp_get_packet(struct rdp_softc *sc, unsigned len)
1103 struct ether_header *eh;
1108 /* Allocate a header mbuf */
1109 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1112 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1113 m->m_pkthdr.len = m->m_len = len;
1116 * We always put the received packet in a single buffer -
1117 * either with just an mbuf header or in a cluster attached
1118 * to the header. The +2 is to compensate for the alignment
1121 if ((len + 2) > MHLEN) {
1122 /* Attach an mbuf cluster */
1123 MCLGET(m, MB_DONTWAIT);
1125 /* Insist on getting a cluster */
1126 if ((m->m_flags & M_EXT) == 0) {
1133 * The +2 is to longword align the start of the real packet.
1134 * This is important for NFS.
1137 eh = mtod(m, struct ether_header *);
1140 * Get packet, including link layer address, from interface.
1142 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1143 outb(sc->baseaddr + lpt_data, RdAddr + MAR);
1145 packet_ptr = (u_char *)eh;
1147 for (s = 0; s < len; s++, packet_ptr++)
1148 *packet_ptr = RdByteA2(sc);
1150 for (s = 0; s < len; s++, packet_ptr++)
1151 *packet_ptr = RdByteA1(sc);
1153 RdEnd(sc, MAR + HNib);
1154 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1155 WrNib(sc, CMR1, CMR1_RDPAC);
1158 * Remove link layer address.
1160 m->m_pkthdr.len = m->m_len = len - sizeof(struct ether_header);
1161 m->m_data += sizeof(struct ether_header);
1163 ether_input(&sc->arpcom.ac_if, eh, m);
1167 * Write an mbuf chain to the NIC's tx buffer.
1170 rdp_write_mbufs(struct rdp_softc *sc, struct mbuf *m)
1177 /* First, count up the total number of bytes to copy */
1178 for (total_len = 0, mp = m; mp; mp = mp->m_next)
1179 total_len += mp->m_len;
1184 outb(sc->baseaddr + lpt_data, MAR | EOC);
1187 * Transfer the mbuf chain to the NIC memory.
1190 /* writing the first byte is complicated */
1191 outb(sc->baseaddr + lpt_control,
1192 Ctrl_LNibRead | sc->irqenbit);
1193 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1194 b = *(u_char *)m->m_data;
1195 outb(sc->baseaddr + lpt_data, (b & 0x0f) | 0x40);
1196 outb(sc->baseaddr + lpt_data, b & 0x0f);
1197 outb(sc->baseaddr + lpt_data, b >> 4);
1198 outb(sc->baseaddr + lpt_control,
1199 Ctrl_HNibRead | sc->irqenbit);
1200 /* advance the mbuf pointer */
1204 /* write the remaining bytes */
1206 for (i = 0, dp = (u_char *)m->m_data;
1209 WrByteALToDRAMA(sc, *dp);
1213 * restore old mbuf in case we have to hand it off to
1220 /* the RTL 8002 requires an even byte-count remote DMA */
1222 WrByteALToDRAMA(sc, 0);
1224 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1226 for (i = 0, dp = (u_char *)m->m_data;
1229 WrByteALToDRAM(sc, *dp);
1233 /* the RTL 8002 requires an even byte-count remote DMA */
1235 WrByteALToDRAM(sc, 0);
1238 outb(sc->baseaddr + lpt_data, 0xff);
1239 outb(sc->baseaddr + lpt_control,
1240 Ctrl_HNibRead | Ctrl_SelData | sc->irqenbit);
1246 * Read the designated ethernet hardware address out of a 93C46
1248 * Note that the 93C46 uses 16-bit words in big-endian notation.
1251 rdp_gethwaddr_93c46(struct rdp_softc *sc, u_char *etheraddr)
1257 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1260 * The original RealTek packet driver had the ethernet address
1261 * starting at EEPROM address 0. Other vendors seem to have
1262 * gone `creative' here -- while they didn't do anything else
1263 * than changing a few strings in the entire driver, compared
1264 * to the RealTek version, they also moved out the ethernet
1265 * address to a different location in the EEPROM, so the
1266 * original RealTek driver won't work correctly with them, and
1267 * vice versa. Sounds pretty cool, eh? $@%&!
1269 * Anyway, we walk through the EEPROM, until we find some
1270 * allowable value based upon our table of IEEE OUI assignments.
1272 for (i = magic = 0; magic < 3 && i < 32; i++) {
1273 /* read cmd (+ 6 bit address) */
1274 rdp_93c46_cmd(sc, 0x180 + i, 10);
1275 w = rdp_93c46_read(sc);
1279 j < sizeof allowed_ouis / sizeof(u_short);
1281 if (w == allowed_ouis[j]) {
1282 etheraddr[0] = (w >> 8) & 0xff;
1283 etheraddr[1] = w & 0xff;
1291 * If the first two bytes have been 00:00, we
1292 * discard the match iff the next two bytes
1293 * are also 00:00, so we won't get fooled by
1294 * an EEPROM that has been filled with zeros.
1295 * This in theory would disallow 64 K of legal
1296 * addresses assigned to Xerox, but it's
1297 * almost certain that those addresses haven't
1298 * been used for RTL80[01]2 chips anyway.
1300 if ((etheraddr[0] | etheraddr[1]) == 0 && w == 0) {
1305 etheraddr[2] = (w >> 8) & 0xff;
1306 etheraddr[3] = w & 0xff;
1311 etheraddr[4] = (w >> 8) & 0xff;
1312 etheraddr[5] = w & 0xff;
1318 WrNib(sc, CMR2, CMR2_IRQINV); /* back to page 0 */
1324 * Read the designated ethernet hardware address out of a 74S288
1327 * This is untested, since i haven't seen any adapter actually using
1328 * a 74S288. In the RTL 8012, only the serial EEPROM (94C46) is
1329 * supported anymore.
1332 rdp_gethwaddr_74s288(struct rdp_softc *sc, u_char *etheraddr)
1337 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1339 for (i = 0; i < 6; i++) {
1340 WrNib(sc, PCMR, i & 0x0f); /* lower 4 bit of addr */
1341 WrNib(sc, PCMR + HNib, HNib + 4); /* upper 2 bit addr + /CS */
1342 WrNib(sc, PCMR + HNib, HNib); /* latch data now */
1343 b = RdNib(sc, PDR) & 0x0f;
1344 b |= (RdNib(sc, PDR + HNib) & 0x0f) << 4;
1348 RdEnd(sc, PDR + HNib);
1349 WrNib(sc, CMR2, CMR2_IRQINV); /* reselect page 0 */
1353 * Send nbits of data (starting with MSB) out to the 93c46 as a
1354 * command. Assumes register page 1 has already been selected.
1357 rdp_93c46_cmd(struct rdp_softc *sc, u_short data, unsigned nbits)
1359 u_short mask = 1 << (nbits - 1);
1364 printf("rdp_93c46_cmd(): ");
1366 for (i = 0; i < nbits; i++, mask >>= 1) {
1367 b = HNib + PCMR_SK + PCMR_CS;
1371 printf("%d", b & 1);
1373 WrNib(sc, PCMR + HNib, b);
1375 WrNib(sc, PCMR + HNib, b & ~PCMR_SK);
1384 * Read one word of data from the 93c46. Actually, we have to read
1385 * 17 bits, and discard the very first bit. Assumes register page 1
1386 * to be selected as well.
1389 rdp_93c46_read(struct rdp_softc *sc)
1396 printf("rdp_93c46_read(): ");
1398 for (i = 0; i < 17; i++) {
1399 WrNib(sc, PCMR + HNib, PCMR_SK + PCMR_CS + HNib);
1401 WrNib(sc, PCMR + HNib, PCMR_CS + HNib);
1408 printf("%d", b & 1);
1418 WrNib(sc, PCMR + HNib, PCMR_SK + HNib);