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 1.3 2003/07/21 07:57:44 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>
76 #include <net/ethernet.h>
78 #include <net/if_arp.h>
79 #include <net/if_dl.h>
80 #include <net/if_mib.h>
83 #include <netinet/in.h>
84 #include <netinet/if_ether.h>
89 #include <netns/ns_if.h>
94 #include <machine/clock.h>
95 #include <machine/md_var.h>
97 #include <i386/isa/isa_device.h>
98 #include <i386/isa/icu.h>
99 #include <i386/isa/if_rdpreg.h>
100 #include <i386/isa/intr_machdep.h>
102 #define IOCTL_CMD_T u_long
105 * Debug levels (ORed together):
106 * != 0 - general (bad packets etc.)
107 * 2 - debug EEPROM IO
108 * 4 - debug interrupt status
114 * rdp_softc: per interface info and status
117 struct arpcom arpcom; /*
118 * Ethernet common, always goes first so
119 * a rdp_softc * can be cast into an
120 * arpcom * or into an ifnet *.
124 * local stuff, somewhat sorted by memory alignment class
126 u_short baseaddr; /* IO port address */
127 u_short txsize; /* tx size for next (buffered) packet,
128 * there's only one additional packet
129 * we can buffer, thus a single variable
130 * ought to be enough */
131 int txbusy; /* tx is transmitting */
132 int txbuffered; /* # of packets in tx buffer */
133 int slow; /* use lpt_control to send data */
134 u_char irqenbit; /* mirror of current Ctrl_IRQEN */
136 * type of parameter EEPROM; device flags 0x1 selects 74S288
139 EEPROM_93C46, EEPROM_74S288 /* or 82S123 */
143 static struct rdp_softc rdp_softc[NRDP];
146 * Since there's no fixed location in the EEPROM about where to find
147 * the ethernet hardware address, we drop a table of valid OUIs here,
148 * and search through the EEPROM until we find a possible valid
149 * Ethernet address. Only the first 16 bits of all possible OUIs are
150 * recorded in the table (as obtained from
151 * http://standards.ieee.org/regauth/oui/oui.txt).
154 static u_short allowed_ouis[] = {
155 0x0000, 0x0001, 0x0002, 0x0004, 0x0005, 0x0006, 0x0007,
156 0x0008, 0x0010, 0x001C, 0x0020, 0x0040, 0x0050, 0x0060,
157 0x0070, 0x0080, 0x0090, 0x009D, 0x00A0, 0x00AA, 0x00BB,
158 0x00C0, 0x00CF, 0x00DD, 0x00E0, 0x00E6, 0x0207, 0x021C,
159 0x0260, 0x0270, 0x029D, 0x02AA, 0x02BB, 0x02C0, 0x02CF,
160 0x02E6, 0x040A, 0x04E0, 0x0800, 0x08BB, 0x1000, 0x1100,
167 static int rdp_probe __P((struct isa_device *));
168 static int rdp_attach __P((struct isa_device *));
171 * Required entry points.
173 static void rdp_init(void *);
174 static int rdp_ioctl(struct ifnet *, IOCTL_CMD_T, caddr_t);
175 static void rdp_start(struct ifnet *);
176 static void rdp_reset(struct ifnet *);
177 static void rdp_watchdog(struct ifnet *);
178 static void rdpintr(int);
181 * REDP private functions.
184 static void rdp_stop(struct rdp_softc *);
185 static void rdp_rint(struct rdp_softc *);
186 static void rdp_get_packet(struct rdp_softc *, unsigned);
187 static u_short rdp_write_mbufs(struct rdp_softc *, struct mbuf *);
188 static int rdp_gethwaddr_93c46(struct rdp_softc *, u_char *);
189 static void rdp_gethwaddr_74s288(struct rdp_softc *, u_char *);
190 static void rdp_93c46_cmd(struct rdp_softc *, u_short, unsigned);
191 static u_short rdp_93c46_read(struct rdp_softc *);
193 struct isa_driver rdpdriver = {
197 1 /* we wanna get a chance before lptN */
201 * REDP-specific functions.
203 * They are inlined, thus go first in this file. Together with gcc's
204 * usual optimization, these functions probably come close to the
205 * packet driver's hand-optimized code. ;-)
207 * Comments are partially obtained from the packet driver as well.
208 * Some of the function names contain register names which don't make
209 * much sense for us, but i've kept them for easier reference in
210 * comparision to the packet driver.
212 * Some of the functions are currently not used by the driver; it's
213 * not quite clear whether we ever need them at all. They are
214 * supposedly even slower than what is currently implemented as `slow'
215 * mode. Right now, `fast' (default) mode is what the packet driver
216 * calls mode 0, slow mode is mode 3 (writing through lpt_control,
219 * We should autoprobe the modi, as opposed to making them dependent
220 * on a kernel configuration flag.
224 * read a nibble from rreg; end-of-data cmd is not issued;
225 * used for general register read.
227 * Unlike the packet driver's version, i'm shifting the result
228 * by 3 here (as opposed to within the caller's code) for clarity.
231 static __inline u_char
232 RdNib(struct rdp_softc *sc, u_char rreg)
235 outb(sc->baseaddr + lpt_data, EOC + rreg);
236 outb(sc->baseaddr + lpt_data, RdAddr + rreg); /* write addr */
237 (void)inb(sc->baseaddr + lpt_status);
238 return (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
243 * read a byte from MAR register through lpt_data; the low nibble is
244 * read prior to the high one; end-of-read command is not issued; used
245 * for remote DMA in mode 4 + 5
247 static __inline u_char
248 RdByte(struct rdp_softc *sc)
252 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
253 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
254 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
255 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
256 return hinib + lonib;
261 * read a byte from MAR register through lpt_data; the low nibble is
262 * read prior to the high one; end-of-read command is not issued; used
263 * for remote DMA in mode 6 + 7
265 static __inline u_char
266 RdByte1(struct rdp_softc *sc)
270 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
271 (void)inb(sc->baseaddr + lpt_status);
272 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
273 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
274 (void)inb(sc->baseaddr + lpt_status);
275 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
276 return hinib + lonib;
282 * read a byte from MAR register through lpt_control; the low nibble is
283 * read prior to the high one; end-of-read command is not issued; used
284 * for remote DMA in mode 0 + 1
286 static __inline u_char
287 RdByteA1(struct rdp_softc *sc)
291 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
292 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
293 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
294 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
295 return hinib + lonib;
300 * read a byte from MAR register through lpt_control; the low nibble is
301 * read prior to the high one; end-of-read command is not issued; used
302 * for remote DMA in mode 2 + 3
304 static __inline u_char
305 RdByteA2(struct rdp_softc *sc)
309 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
310 (void)inb(sc->baseaddr + lpt_status);
311 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
312 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
313 (void)inb(sc->baseaddr + lpt_status);
314 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
315 return hinib + lonib;
322 RdEnd(struct rdp_softc *sc, u_char rreg)
325 outb(sc->baseaddr + lpt_data, EOC + rreg);
329 * Write a nibble to a register; end-of-write is issued.
330 * Used for general register write.
333 WrNib(struct rdp_softc *sc, u_char wreg, u_char wdata)
336 /* prepare and write address */
337 outb(sc->baseaddr + lpt_data, EOC + wreg);
338 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
339 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
340 /* prepare and write data */
341 outb(sc->baseaddr + lpt_data, WrAddr + wdata);
342 outb(sc->baseaddr + lpt_data, wdata);
343 outb(sc->baseaddr + lpt_data, wdata);
345 outb(sc->baseaddr + lpt_data, EOC + wdata);
349 * Write a byte to a register; end-of-write is issued.
350 * Used for general register write.
353 WrByte(struct rdp_softc *sc, u_char wreg, u_char wdata)
356 /* prepare and write address */
357 outb(sc->baseaddr + lpt_data, EOC + wreg);
358 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
359 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
360 /* prepare and write low nibble */
361 outb(sc->baseaddr + lpt_data, WrAddr + (wdata & 0x0F));
362 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
363 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
364 /* prepare and write high nibble */
366 outb(sc->baseaddr + lpt_data, wdata);
367 outb(sc->baseaddr + lpt_data, wdata + HNib);
368 outb(sc->baseaddr + lpt_data, wdata + HNib);
370 outb(sc->baseaddr + lpt_data, EOC + wdata + HNib);
374 * Write the byte to DRAM via lpt_data;
375 * used for remote DMA write in mode 0 / 2 / 4
378 WrByteALToDRAM(struct rdp_softc *sc, u_char val)
381 outb(sc->baseaddr + lpt_data, val & 0x0F);
382 outb(sc->baseaddr + lpt_data, MkHi(val));
386 * Write the byte to DRAM via lpt_control;
387 * used for remote DMA write in mode 1 / 3 / 5
390 WrByteALToDRAMA(struct rdp_softc *sc, u_char val)
393 outb(sc->baseaddr + lpt_data, val & 0x0F);
394 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
395 outb(sc->baseaddr + lpt_data, val >> 4);
396 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
399 #if 0 /* they could be used for the RAM test */
401 * Write the u_short to DRAM via lpt_data;
402 * used for remote DMA write in mode 0 / 2 / 4
405 WrWordbxToDRAM(struct rdp_softc *sc, u_short val)
408 outb(sc->baseaddr + lpt_data, val & 0x0F);
410 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
412 outb(sc->baseaddr + lpt_data, val & 0x0F);
414 outb(sc->baseaddr + lpt_data, val + HNib);
419 * Write the u_short to DRAM via lpt_control;
420 * used for remote DMA write in mode 1 / 3 / 5
423 WrWordbxToDRAMA(struct rdp_softc *sc, u_short val)
426 outb(sc->baseaddr + lpt_data, val & 0x0F);
427 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
429 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
430 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
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 + HNib);
436 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
442 * Determine if the device is present
445 * a pointer to an isa_device struct
447 * 0 if device not found
448 * or # of i/o addresses used (if found)
451 rdp_probe(struct isa_device *isa_dev)
453 int unit = isa_dev->id_unit;
454 struct rdp_softc *sc = &rdp_softc[unit];
456 intrmask_t irqmap[3];
459 if (unit < 0 || unit >= NRDP)
462 sc->baseaddr = isa_dev->id_iobase;
463 if (isa_dev->id_flags & 1)
464 sc->eeprom = EEPROM_74S288;
465 /* else defaults to 93C46 */
466 if (isa_dev->id_flags & 2)
469 /* let R/WB = A/DB = CSB = high to be ready for next r/w cycle */
470 outb(sc->baseaddr + lpt_data, 0xFF);
471 /* DIR = 0 for write mode, IRQEN=0, SLCT=INIT=AUTOFEED=STB=high */
472 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
474 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
477 b1 = RdNib(sc, CMR1);
479 b2 = RdNib(sc, CMR2) & 0x0f;
480 b2 |= RdNib(sc, CMR2 + HNib) << 4;
481 RdEnd(sc, CMR2 + HNib);
483 * After the reset, we expect CMR1 & 7 to be 1 (rx buffer empty),
484 * and CMR2 & 0xf7 to be 0x20 (receive mode set to physical and
488 printf("rdp%d: CMR1 = %#x, CMR2 = %#x\n", unit, b1, b2);
490 if ((b1 & (CMR1_BUFE | CMR1_IRQ | CMR1_TRA)) != CMR1_BUFE
491 || (b2 & ~CMR2_IRQINV) != CMR2_AM_PB)
495 * We have found something that could be a RTL 80[01]2, now
496 * see whether we can generate an interrupt.
501 * Test whether our configured IRQ is working.
503 * Set to no acception mode + IRQout, then enable RxE + TxE,
504 * then cause RBER (by advancing the read pointer although
505 * the read buffer is empty) to generate an interrupt.
507 WrByte(sc, CMR2, CMR2_IRQOUT);
508 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
509 WrNib(sc, CMR1, CMR1_RDPAC);
512 irqmap[0] = isa_irq_pending();
513 sval[0] = inb(sc->baseaddr + lpt_status);
515 /* allow IRQs to pass the parallel interface */
516 outb(sc->baseaddr + lpt_control, Ctrl_IRQEN + Ctrl_SelData);
518 /* generate interrupt */
519 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
522 irqmap[1] = isa_irq_pending();
523 sval[1] = inb(sc->baseaddr + lpt_status);
525 /* de-assert and disable IRQ */
526 WrNib(sc, IMR + HNib, MkHi(0));
527 (void)inb(sc->baseaddr + lpt_status); /* might be necessary to
530 irqmap[2] = isa_irq_pending();
531 sval[2] = inb(sc->baseaddr + lpt_status);
533 WrNib(sc, CMR1 + HNib, MkHi(0));
534 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
535 WrNib(sc, CMR2, CMR2_IRQINV);
540 printf("rdp%d: irq maps / lpt status "
541 "%#x/%#x - %#x/%#x - %#x/%#x (id_irq %#x)\n",
542 unit, irqmap[0], sval[0], irqmap[1], sval[1],
543 irqmap[2], sval[2], isa_dev->id_irq);
545 if ((irqmap[1] & isa_dev->id_irq) == 0) {
546 printf("rdp%d: configured IRQ (%d) cannot be asserted "
548 unit, ffs(isa_dev->id_irq) - 1);
550 printf(" (probable IRQ: %d)", ffs(irqmap[1]) - 1);
556 * XXX should do RAMtest here
559 switch (sc->eeprom) {
561 if (rdp_gethwaddr_93c46(sc, sc->arpcom.ac_enaddr) == 0) {
562 printf("rdp%d: failed to find a valid hardware "
563 "address in EEPROM\n",
570 rdp_gethwaddr_74s288(sc, sc->arpcom.ac_enaddr);
574 return lpt_control + 1;
578 * Install interface into kernel networking data structures
581 rdp_attach(struct isa_device *isa_dev)
583 int unit = isa_dev->id_unit;
584 struct rdp_softc *sc = &rdp_softc[unit];
585 struct ifnet *ifp = &sc->arpcom.ac_if;
587 isa_dev->id_ointr = rdpintr;
596 * Initialize ifnet structure
600 ifp->if_name = "rdp";
601 ifp->if_output = ether_output;
602 ifp->if_start = rdp_start;
603 ifp->if_ioctl = rdp_ioctl;
604 ifp->if_watchdog = rdp_watchdog;
605 ifp->if_init = rdp_init;
606 ifp->if_snd.ifq_maxlen = IFQ_MAXLEN;
607 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
610 * Attach the interface
612 ether_ifattach(ifp, ETHER_BPF_SUPPORTED);
616 * Print additional info when attached
618 printf("%s%d: RealTek RTL%s pocket ethernet, EEPROM %s, %s mode\n",
619 ifp->if_name, ifp->if_unit,
620 "8002", /* hook for 8012 */
621 sc->eeprom == EEPROM_93C46? "93C46": "74S288",
622 sc->slow? "slow": "fast");
623 printf("%s%d: address %6D\n", ifp->if_name, ifp->if_unit,
624 sc->arpcom.ac_enaddr, ":");
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, "rdp%d: device timeout\n", ifp->if_unit);
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)
826 struct rdp_softc *sc = ifp->if_softc;
836 error = ether_ioctl(ifp, command, data);
841 * If the interface is marked up and stopped, then start it.
842 * If it is marked down and running, then stop it.
844 if (ifp->if_flags & IFF_UP) {
845 if ((ifp->if_flags & IFF_RUNNING) == 0)
848 if (ifp->if_flags & IFF_RUNNING) {
850 ifp->if_flags &= ~IFF_RUNNING;
855 * Promiscuous flag may have changed, propagage this
858 if (ifp->if_flags & IFF_UP)
859 WrNib(sc, CMR2 + HNib,
860 MkHi((ifp->if_flags & IFF_PROMISC)?
861 CMR2_AM_ALL: CMR2_AM_PB));
868 * Multicast list has changed; we don't support it.
881 * External interrupt service routine.
886 struct rdp_softc *sc = rdp_softc + unit;
887 struct ifnet *ifp = (struct ifnet *)sc;
888 u_char isr, tsr, rsr, colls;
890 /* disable interrupts, so SD3 can be routed to the pin */
892 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
893 WrNib(sc, CMR2, CMR2_IRQINV);
895 * loop until there are no more new interrupts
898 isr = RdNib(sc, ISR);
899 isr |= RdNib(sc, ISR + HNib) << 4;
900 RdEnd(sc, ISR + HNib);
905 printf("rdp%d: ISR = %#x\n", unit, isr);
909 * Clear the pending interrupt bits.
911 WrNib(sc, ISR, isr & 0x0f);
913 WrNib(sc, ISR + HNib, MkHi(isr));
916 * Handle transmitter interrupts.
918 if (isr & (ISR_TOK | ISR_TER)) {
919 tsr = RdNib(sc, TSR);
923 printf("rdp%d: tsr %#x\n", unit, tsr);
929 * Update total number of successfully
930 * transmitted packets.
935 colls = RdNib(sc, COLR);
937 ifp->if_collisions += colls;
941 * reset tx busy and output active flags
944 ifp->if_flags &= ~IFF_OACTIVE;
947 * If we had already queued up another packet,
948 * start sending it now.
950 if (sc->txbuffered) {
951 WrNib(sc, TBCR1, sc->txsize >> 8);
952 WrByte(sc, TBCR0, sc->txsize & 0xff);
953 WrNib(sc, CMR1, CMR1_TRA);
959 * clear watchdog timer
967 * Handle receiver interrupts
969 if (isr & (ISR_ROK | ISR_RER | ISR_RBER)) {
970 rsr = RdNib(sc, RSR);
971 rsr |= RdNib(sc, RSR + HNib) << 4;
972 RdEnd(sc, RSR + HNib);
974 if (isr & (ISR_RER | ISR_RBER))
975 printf("rdp%d: rsr %#x\n", unit, rsr);
978 if (rsr & (RSR_PUN | RSR_POV)) {
979 printf("rdp%d: rsr %#x, resetting\n",
987 * CRC and FA errors are recorded in
988 * rdp_rint() on a per-packet basis
991 if (isr & (ISR_ROK | ISR_RER))
996 * If it looks like the transmitter can take more data,
997 * attempt to start output on the interface. This is done
998 * after handling the receiver to give the receiver priority.
1000 if ((ifp->if_flags & IFF_OACTIVE) == 0)
1004 /* re-enable interrupts */
1005 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
1006 sc->irqenbit = Ctrl_IRQEN;
1007 outb(sc->baseaddr + lpt_control, Ctrl_SelData + sc->irqenbit);
1011 * Ethernet interface receiver interrupt.
1014 rdp_rint(struct rdp_softc *sc)
1016 struct ifnet *ifp = &sc->arpcom.ac_if;
1020 u_char *packet_ptr, b, status;
1021 int excessive_bad_pkts = 0;
1024 * Fetch the packets from the NIC's buffer.
1027 b = RdNib(sc, CMR1);
1031 /* no more packets */
1034 /* first, obtain the buffer header */
1036 outb(sc->baseaddr + lpt_data, MAR + EOC); /* prepare addr */
1037 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1038 outb(sc->baseaddr + lpt_data, MAR + RdAddr + HNib);
1040 packet_ptr = (u_char *)&rh;
1042 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1043 *packet_ptr = RdByteA2(sc);
1045 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1046 *packet_ptr = RdByteA1(sc);
1048 RdEnd(sc, MAR + HNib);
1049 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1051 len = rh.pktlen - ETHER_CRC_LEN;
1054 if ((status & (RSR_ROK | RSR_CRC | RSR_FA)) != RSR_ROK ||
1055 len > (ETHER_MAX_LEN - ETHER_CRC_LEN) ||
1056 len < (ETHER_MIN_LEN - ETHER_CRC_LEN) ||
1059 printf("rdp%d: bad packet in buffer, "
1060 "len %d, status %#x\n",
1061 ifp->if_unit, (int)len, (int)status);
1064 /* rx jump packet */
1065 WrNib(sc, CMR1, CMR1_RDPAC);
1066 if (++excessive_bad_pkts > 5) {
1068 * the chip seems to be stuck, we are
1069 * probably seeing the same bad packet
1070 * over and over again
1073 printf("rdp%d: resetting due to an "
1074 "excessive number of bad packets\n",
1086 excessive_bad_pkts = 0;
1087 rdp_get_packet(sc, len);
1093 * Retreive packet from NIC memory and send to the next level up via
1097 rdp_get_packet(struct rdp_softc *sc, unsigned len)
1099 struct ether_header *eh;
1104 /* Allocate a header mbuf */
1105 MGETHDR(m, M_DONTWAIT, MT_DATA);
1108 m->m_pkthdr.rcvif = &sc->arpcom.ac_if;
1109 m->m_pkthdr.len = m->m_len = len;
1112 * We always put the received packet in a single buffer -
1113 * either with just an mbuf header or in a cluster attached
1114 * to the header. The +2 is to compensate for the alignment
1117 if ((len + 2) > MHLEN) {
1118 /* Attach an mbuf cluster */
1119 MCLGET(m, M_DONTWAIT);
1121 /* Insist on getting a cluster */
1122 if ((m->m_flags & M_EXT) == 0) {
1129 * The +2 is to longword align the start of the real packet.
1130 * This is important for NFS.
1133 eh = mtod(m, struct ether_header *);
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 = (u_char *)eh;
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);
1154 * Remove link layer address.
1156 m->m_pkthdr.len = m->m_len = len - sizeof(struct ether_header);
1157 m->m_data += sizeof(struct ether_header);
1159 ether_input(&sc->arpcom.ac_if, eh, m);
1163 * Write an mbuf chain to the NIC's tx buffer.
1166 rdp_write_mbufs(struct rdp_softc *sc, struct mbuf *m)
1173 /* First, count up the total number of bytes to copy */
1174 for (total_len = 0, mp = m; mp; mp = mp->m_next)
1175 total_len += mp->m_len;
1180 outb(sc->baseaddr + lpt_data, MAR | EOC);
1183 * Transfer the mbuf chain to the NIC memory.
1186 /* writing the first byte is complicated */
1187 outb(sc->baseaddr + lpt_control,
1188 Ctrl_LNibRead | sc->irqenbit);
1189 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1190 b = *(u_char *)m->m_data;
1191 outb(sc->baseaddr + lpt_data, (b & 0x0f) | 0x40);
1192 outb(sc->baseaddr + lpt_data, b & 0x0f);
1193 outb(sc->baseaddr + lpt_data, b >> 4);
1194 outb(sc->baseaddr + lpt_control,
1195 Ctrl_HNibRead | sc->irqenbit);
1196 /* advance the mbuf pointer */
1200 /* write the remaining bytes */
1202 for (i = 0, dp = (u_char *)m->m_data;
1205 WrByteALToDRAMA(sc, *dp);
1209 * restore old mbuf in case we have to hand it off to
1216 /* the RTL 8002 requires an even byte-count remote DMA */
1218 WrByteALToDRAMA(sc, 0);
1220 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1222 for (i = 0, dp = (u_char *)m->m_data;
1225 WrByteALToDRAM(sc, *dp);
1229 /* the RTL 8002 requires an even byte-count remote DMA */
1231 WrByteALToDRAM(sc, 0);
1234 outb(sc->baseaddr + lpt_data, 0xff);
1235 outb(sc->baseaddr + lpt_control,
1236 Ctrl_HNibRead | Ctrl_SelData | sc->irqenbit);
1242 * Read the designated ethernet hardware address out of a 93C46
1244 * Note that the 93C46 uses 16-bit words in big-endian notation.
1247 rdp_gethwaddr_93c46(struct rdp_softc *sc, u_char *etheraddr)
1253 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1256 * The original RealTek packet driver had the ethernet address
1257 * starting at EEPROM address 0. Other vendors seem to have
1258 * gone `creative' here -- while they didn't do anything else
1259 * than changing a few strings in the entire driver, compared
1260 * to the RealTek version, they also moved out the ethernet
1261 * address to a different location in the EEPROM, so the
1262 * original RealTek driver won't work correctly with them, and
1263 * vice versa. Sounds pretty cool, eh? $@%&!
1265 * Anyway, we walk through the EEPROM, until we find some
1266 * allowable value based upon our table of IEEE OUI assignments.
1268 for (i = magic = 0; magic < 3 && i < 32; i++) {
1269 /* read cmd (+ 6 bit address) */
1270 rdp_93c46_cmd(sc, 0x180 + i, 10);
1271 w = rdp_93c46_read(sc);
1275 j < sizeof allowed_ouis / sizeof(u_short);
1277 if (w == allowed_ouis[j]) {
1278 etheraddr[0] = (w >> 8) & 0xff;
1279 etheraddr[1] = w & 0xff;
1287 * If the first two bytes have been 00:00, we
1288 * discard the match iff the next two bytes
1289 * are also 00:00, so we won't get fooled by
1290 * an EEPROM that has been filled with zeros.
1291 * This in theory would disallow 64 K of legal
1292 * addresses assigned to Xerox, but it's
1293 * almost certain that those addresses haven't
1294 * been used for RTL80[01]2 chips anyway.
1296 if ((etheraddr[0] | etheraddr[1]) == 0 && w == 0) {
1301 etheraddr[2] = (w >> 8) & 0xff;
1302 etheraddr[3] = w & 0xff;
1307 etheraddr[4] = (w >> 8) & 0xff;
1308 etheraddr[5] = w & 0xff;
1314 WrNib(sc, CMR2, CMR2_IRQINV); /* back to page 0 */
1320 * Read the designated ethernet hardware address out of a 74S288
1323 * This is untested, since i haven't seen any adapter actually using
1324 * a 74S288. In the RTL 8012, only the serial EEPROM (94C46) is
1325 * supported anymore.
1328 rdp_gethwaddr_74s288(struct rdp_softc *sc, u_char *etheraddr)
1333 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1335 for (i = 0; i < 6; i++) {
1336 WrNib(sc, PCMR, i & 0x0f); /* lower 4 bit of addr */
1337 WrNib(sc, PCMR + HNib, HNib + 4); /* upper 2 bit addr + /CS */
1338 WrNib(sc, PCMR + HNib, HNib); /* latch data now */
1339 b = RdNib(sc, PDR) & 0x0f;
1340 b |= (RdNib(sc, PDR + HNib) & 0x0f) << 4;
1344 RdEnd(sc, PDR + HNib);
1345 WrNib(sc, CMR2, CMR2_IRQINV); /* reselect page 0 */
1349 * Send nbits of data (starting with MSB) out to the 93c46 as a
1350 * command. Assumes register page 1 has already been selected.
1353 rdp_93c46_cmd(struct rdp_softc *sc, u_short data, unsigned nbits)
1355 u_short mask = 1 << (nbits - 1);
1360 printf("rdp_93c46_cmd(): ");
1362 for (i = 0; i < nbits; i++, mask >>= 1) {
1363 b = HNib + PCMR_SK + PCMR_CS;
1367 printf("%d", b & 1);
1369 WrNib(sc, PCMR + HNib, b);
1371 WrNib(sc, PCMR + HNib, b & ~PCMR_SK);
1380 * Read one word of data from the 93c46. Actually, we have to read
1381 * 17 bits, and discard the very first bit. Assumes register page 1
1382 * to be selected as well.
1385 rdp_93c46_read(struct rdp_softc *sc)
1392 printf("rdp_93c46_read(): ");
1394 for (i = 0; i < 17; i++) {
1395 WrNib(sc, PCMR + HNib, PCMR_SK + PCMR_CS + HNib);
1397 WrNib(sc, PCMR + HNib, PCMR_CS + HNib);
1404 printf("%d", b & 1);
1414 WrNib(sc, PCMR + HNib, PCMR_SK + HNib);