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 1.26 2008/08/02 01:14:42 dillon Exp $
32 * Device driver for RealTek RTL 8002 (`REDP') based pocket-ethernet
33 * adapters, hooked up to a printer port. `rdp' is a shorthand for
34 * REDP since some tools like netstat work best if the interface name
35 * has no more than three letters.
37 * Driver configuration flags so far:
38 * flags 0x1 -- assume 74S288 EEPROM (default 94C46)
39 * flags 0x2 -- use `slow' mode (mode 3 of the packet driver, default 0)
41 * Maybe this driver will some day also work with the successor, RTL
42 * 8012 (`AREDP'), which is unfortunately not fully register-
43 * compatible with the 8002. The 8012 offers support for faster
44 * transfer modi like bidirectional SPP and EPP, 64 K x 4 buffer
45 * memory as opposed to 16 K x 4 for the 8002, a multicast filter, and
46 * a builtin multiplexer that allows chaining a printer behind the
49 * About the only documentation i've been able to find about the RTL
50 * 8002 was the packet driver source code at ftp.realtek.com.tw, so
51 * this driver is somewhat based on the way the packet driver handles
52 * the chip. The exact author of the packet driver is unknown, the
53 * only name that i could find in the source was someone called Chiu,
54 * supposedly an employee of RealTek. So credits to them for that
55 * piece of code which has proven valuable to me.
57 * Later on, Leo kuo <leo@realtek.com.tw> has been very helpful to me
58 * by sending me a readable (PDF) file documenting the RTL 8012, which
59 * helped me to also understand the 8002, as well as by providing me
60 * with the source code of the 8012 packet driver that i haven't been
61 * able to find on the FTP site. A big Thanks! goes here to RealTek
62 * for this kind of service.
67 #include <sys/param.h>
68 #include <sys/systm.h>
70 #include <sys/sockio.h>
71 #include <sys/malloc.h>
73 #include <sys/socket.h>
74 #include <sys/syslog.h>
75 #include <sys/linker_set.h>
76 #include <sys/module.h>
78 #include <sys/serialize.h>
79 #include <sys/thread2.h>
81 #include <net/ethernet.h>
83 #include <net/ifq_var.h>
84 #include <net/if_arp.h>
85 #include <net/if_dl.h>
86 #include <net/if_mib.h>
89 #include <netinet/in.h>
90 #include <netinet/if_ether.h>
95 #include <netns/ns_if.h>
100 #include <machine/clock.h>
101 #include <machine/md_var.h>
103 #include <bus/isa/isavar.h>
104 #include <bus/isa/isa_device.h>
105 #include <machine_base/icu/icu.h>
106 #include "if_rdpreg.h"
107 #include <machine_base/isa/intr_machdep.h>
109 #define IOCTL_CMD_T u_long
112 * Debug levels (ORed together):
113 * != 0 - general (bad packets etc.)
114 * 2 - debug EEPROM IO
115 * 4 - debug interrupt status
121 * rdp_softc: per interface info and status
124 struct arpcom arpcom; /*
125 * Ethernet common, always goes first so
126 * a rdp_softc * can be cast into an
127 * arpcom * or into an ifnet *.
131 * local stuff, somewhat sorted by memory alignment class
133 u_short baseaddr; /* IO port address */
134 u_short txsize; /* tx size for next (buffered) packet,
135 * there's only one additional packet
136 * we can buffer, thus a single variable
137 * ought to be enough */
138 int txbusy; /* tx is transmitting */
139 int txbuffered; /* # of packets in tx buffer */
140 int slow; /* use lpt_control to send data */
141 u_char irqenbit; /* mirror of current Ctrl_IRQEN */
143 * type of parameter EEPROM; device flags 0x1 selects 74S288
146 EEPROM_93C46, EEPROM_74S288 /* or 82S123 */
150 DECLARE_DUMMY_MODULE(if_rdp);
152 static struct rdp_softc rdp_softc[NRDP];
155 * Since there's no fixed location in the EEPROM about where to find
156 * the ethernet hardware address, we drop a table of valid OUIs here,
157 * and search through the EEPROM until we find a possible valid
158 * Ethernet address. Only the first 16 bits of all possible OUIs are
159 * recorded in the table (as obtained from
160 * http://standards.ieee.org/regauth/oui/oui.txt).
163 static u_short allowed_ouis[] = {
164 0x0000, 0x0001, 0x0002, 0x0004, 0x0005, 0x0006, 0x0007,
165 0x0008, 0x0010, 0x001C, 0x0020, 0x0040, 0x0050, 0x0060,
166 0x0070, 0x0080, 0x0090, 0x009D, 0x00A0, 0x00AA, 0x00BB,
167 0x00C0, 0x00CF, 0x00DD, 0x00E0, 0x00E6, 0x0207, 0x021C,
168 0x0260, 0x0270, 0x029D, 0x02AA, 0x02BB, 0x02C0, 0x02CF,
169 0x02E6, 0x040A, 0x04E0, 0x0800, 0x08BB, 0x1000, 0x1100,
176 static int rdp_probe (struct isa_device *);
177 static int rdp_attach (struct isa_device *);
180 * Required entry points.
182 static void rdp_init(void *);
183 static int rdp_ioctl(struct ifnet *, IOCTL_CMD_T, caddr_t, struct ucred *);
184 static void rdp_start(struct ifnet *);
185 static void rdp_reset(struct ifnet *);
186 static void rdp_watchdog(struct ifnet *);
187 static void rdpintr(void *);
190 * REDP private functions.
193 static void rdp_stop(struct rdp_softc *);
194 static void rdp_rint(struct rdp_softc *);
195 static void rdp_get_packet(struct rdp_softc *, unsigned);
196 static u_short rdp_write_mbufs(struct rdp_softc *, struct mbuf *);
197 static int rdp_gethwaddr_93c46(struct rdp_softc *, u_char *);
198 static void rdp_gethwaddr_74s288(struct rdp_softc *, u_char *);
199 static void rdp_93c46_cmd(struct rdp_softc *, u_short, unsigned);
200 static u_short rdp_93c46_read(struct rdp_softc *);
202 struct isa_driver rdpdriver = {
206 1 /* we wanna get a chance before lptN */
210 * REDP-specific functions.
212 * They are inlined, thus go first in this file. Together with gcc's
213 * usual optimization, these functions probably come close to the
214 * packet driver's hand-optimized code. ;-)
216 * Comments are partially obtained from the packet driver as well.
217 * Some of the function names contain register names which don't make
218 * much sense for us, but i've kept them for easier reference in
219 * comparision to the packet driver.
221 * Some of the functions are currently not used by the driver; it's
222 * not quite clear whether we ever need them at all. They are
223 * supposedly even slower than what is currently implemented as `slow'
224 * mode. Right now, `fast' (default) mode is what the packet driver
225 * calls mode 0, slow mode is mode 3 (writing through lpt_control,
228 * We should autoprobe the modi, as opposed to making them dependent
229 * on a kernel configuration flag.
233 * read a nibble from rreg; end-of-data cmd is not issued;
234 * used for general register read.
236 * Unlike the packet driver's version, i'm shifting the result
237 * by 3 here (as opposed to within the caller's code) for clarity.
240 static __inline u_char
241 RdNib(struct rdp_softc *sc, u_char rreg)
244 outb(sc->baseaddr + lpt_data, EOC + rreg);
245 outb(sc->baseaddr + lpt_data, RdAddr + rreg); /* write addr */
246 inb(sc->baseaddr + lpt_status);
247 return (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
252 * read a byte from MAR register through lpt_data; the low nibble is
253 * read prior to the high one; end-of-read command is not issued; used
254 * for remote DMA in mode 4 + 5
256 static __inline u_char
257 RdByte(struct rdp_softc *sc)
261 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
262 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
263 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
264 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
265 return hinib + lonib;
270 * read a byte from MAR register through lpt_data; the low nibble is
271 * read prior to the high one; end-of-read command is not issued; used
272 * for remote DMA in mode 6 + 7
274 static __inline u_char
275 RdByte1(struct rdp_softc *sc)
279 outb(sc->baseaddr + lpt_data, RdAddr + MAR); /* cmd for low nibble */
280 inb(sc->baseaddr + lpt_status);
281 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
282 outb(sc->baseaddr + lpt_data, RdAddr + MAR + HNib);
283 inb(sc->baseaddr + lpt_status);
284 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
285 return hinib + lonib;
291 * read a byte from MAR register through lpt_control; the low nibble is
292 * read prior to the high one; end-of-read command is not issued; used
293 * for remote DMA in mode 0 + 1
295 static __inline u_char
296 RdByteA1(struct rdp_softc *sc)
300 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
301 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
302 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
303 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
304 return hinib + lonib;
309 * read a byte from MAR register through lpt_control; the low nibble is
310 * read prior to the high one; end-of-read command is not issued; used
311 * for remote DMA in mode 2 + 3
313 static __inline u_char
314 RdByteA2(struct rdp_softc *sc)
318 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
319 inb(sc->baseaddr + lpt_status);
320 lonib = (inb(sc->baseaddr + lpt_status) >> 3) & 0x0f;
321 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead);
322 inb(sc->baseaddr + lpt_status);
323 hinib = (inb(sc->baseaddr + lpt_status) << 1) & 0xf0;
324 return hinib + lonib;
331 RdEnd(struct rdp_softc *sc, u_char rreg)
334 outb(sc->baseaddr + lpt_data, EOC + rreg);
338 * Write a nibble to a register; end-of-write is issued.
339 * Used for general register write.
342 WrNib(struct rdp_softc *sc, u_char wreg, u_char wdata)
345 /* prepare and write address */
346 outb(sc->baseaddr + lpt_data, EOC + wreg);
347 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
348 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
349 /* prepare and write data */
350 outb(sc->baseaddr + lpt_data, WrAddr + wdata);
351 outb(sc->baseaddr + lpt_data, wdata);
352 outb(sc->baseaddr + lpt_data, wdata);
354 outb(sc->baseaddr + lpt_data, EOC + wdata);
358 * Write a byte to a register; end-of-write is issued.
359 * Used for general register write.
362 WrByte(struct rdp_softc *sc, u_char wreg, u_char wdata)
365 /* prepare and write address */
366 outb(sc->baseaddr + lpt_data, EOC + wreg);
367 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
368 outb(sc->baseaddr + lpt_data, WrAddr + wreg);
369 /* prepare and write low nibble */
370 outb(sc->baseaddr + lpt_data, WrAddr + (wdata & 0x0F));
371 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
372 outb(sc->baseaddr + lpt_data, (wdata & 0x0F));
373 /* prepare and write high nibble */
375 outb(sc->baseaddr + lpt_data, wdata);
376 outb(sc->baseaddr + lpt_data, wdata + HNib);
377 outb(sc->baseaddr + lpt_data, wdata + HNib);
379 outb(sc->baseaddr + lpt_data, EOC + wdata + HNib);
383 * Write the byte to DRAM via lpt_data;
384 * used for remote DMA write in mode 0 / 2 / 4
387 WrByteALToDRAM(struct rdp_softc *sc, u_char val)
390 outb(sc->baseaddr + lpt_data, val & 0x0F);
391 outb(sc->baseaddr + lpt_data, MkHi(val));
395 * Write the byte to DRAM via lpt_control;
396 * used for remote DMA write in mode 1 / 3 / 5
399 WrByteALToDRAMA(struct rdp_softc *sc, u_char val)
402 outb(sc->baseaddr + lpt_data, val & 0x0F);
403 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
404 outb(sc->baseaddr + lpt_data, val >> 4);
405 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
408 #if 0 /* they could be used for the RAM test */
410 * Write the u_short to DRAM via lpt_data;
411 * used for remote DMA write in mode 0 / 2 / 4
414 WrWordbxToDRAM(struct rdp_softc *sc, u_short val)
417 outb(sc->baseaddr + lpt_data, val & 0x0F);
419 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
421 outb(sc->baseaddr + lpt_data, val & 0x0F);
423 outb(sc->baseaddr + lpt_data, val + HNib);
428 * Write the u_short to DRAM via lpt_control;
429 * used for remote DMA write in mode 1 / 3 / 5
432 WrWordbxToDRAMA(struct rdp_softc *sc, u_short val)
435 outb(sc->baseaddr + lpt_data, val & 0x0F);
436 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
438 outb(sc->baseaddr + lpt_data, (val & 0x0F) + HNib);
439 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
441 outb(sc->baseaddr + lpt_data, val & 0x0F);
442 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead | sc->irqenbit);
444 outb(sc->baseaddr + lpt_data, val + HNib);
445 outb(sc->baseaddr + lpt_control, Ctrl_HNibRead | sc->irqenbit);
451 * Determine if the device is present
454 * a pointer to an isa_device struct
456 * 0 if device not found
457 * or # of i/o addresses used (if found)
460 rdp_probe(struct isa_device *isa_dev)
462 int unit = isa_dev->id_unit;
463 struct rdp_softc *sc = &rdp_softc[unit];
465 intrmask_t irqmap[3];
468 if (unit < 0 || unit >= NRDP)
471 sc->baseaddr = isa_dev->id_iobase;
472 if (isa_dev->id_flags & 1)
473 sc->eeprom = EEPROM_74S288;
474 /* else defaults to 93C46 */
475 if (isa_dev->id_flags & 2)
478 /* let R/WB = A/DB = CSB = high to be ready for next r/w cycle */
479 outb(sc->baseaddr + lpt_data, 0xFF);
480 /* DIR = 0 for write mode, IRQEN=0, SLCT=INIT=AUTOFEED=STB=high */
481 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
483 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
486 b1 = RdNib(sc, CMR1);
488 b2 = RdNib(sc, CMR2) & 0x0f;
489 b2 |= RdNib(sc, CMR2 + HNib) << 4;
490 RdEnd(sc, CMR2 + HNib);
492 * After the reset, we expect CMR1 & 7 to be 1 (rx buffer empty),
493 * and CMR2 & 0xf7 to be 0x20 (receive mode set to physical and
497 kprintf("rdp%d: CMR1 = %#x, CMR2 = %#x\n", unit, b1, b2);
499 if ((b1 & (CMR1_BUFE | CMR1_IRQ | CMR1_TRA)) != CMR1_BUFE
500 || (b2 & ~CMR2_IRQINV) != CMR2_AM_PB)
504 * We have found something that could be a RTL 80[01]2, now
505 * see whether we can generate an interrupt.
510 * Test whether our configured IRQ is working.
512 * Set to no acception mode + IRQout, then enable RxE + TxE,
513 * then cause RBER (by advancing the read pointer although
514 * the read buffer is empty) to generate an interrupt.
516 WrByte(sc, CMR2, CMR2_IRQOUT);
517 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
518 WrNib(sc, CMR1, CMR1_RDPAC);
521 irqmap[0] = isa_irq_pending();
522 sval[0] = inb(sc->baseaddr + lpt_status);
524 /* allow IRQs to pass the parallel interface */
525 outb(sc->baseaddr + lpt_control, Ctrl_IRQEN + Ctrl_SelData);
527 /* generate interrupt */
528 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
531 irqmap[1] = isa_irq_pending();
532 sval[1] = inb(sc->baseaddr + lpt_status);
534 /* de-assert and disable IRQ */
535 WrNib(sc, IMR + HNib, MkHi(0));
536 inb(sc->baseaddr + lpt_status); /* might be necessary to clear IRQ */
538 irqmap[2] = isa_irq_pending();
539 sval[2] = inb(sc->baseaddr + lpt_status);
541 WrNib(sc, CMR1 + HNib, MkHi(0));
542 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
543 WrNib(sc, CMR2, CMR2_IRQINV);
548 kprintf("rdp%d: irq maps / lpt status "
549 "%#x/%#x - %#x/%#x - %#x/%#x (id_irq %#x)\n",
550 unit, irqmap[0], sval[0], irqmap[1], sval[1],
551 irqmap[2], sval[2], isa_dev->id_irq);
553 if ((irqmap[1] & isa_dev->id_irq) == 0) {
554 kprintf("rdp%d: configured IRQ (%d) cannot be asserted "
556 unit, ffs(isa_dev->id_irq) - 1);
558 kprintf(" (probable IRQ: %d)", ffs(irqmap[1]) - 1);
564 * XXX should do RAMtest here
567 switch (sc->eeprom) {
569 if (rdp_gethwaddr_93c46(sc, sc->arpcom.ac_enaddr) == 0) {
570 kprintf("rdp%d: failed to find a valid hardware "
571 "address in EEPROM\n",
578 rdp_gethwaddr_74s288(sc, sc->arpcom.ac_enaddr);
582 return lpt_control + 1;
586 * Install interface into kernel networking data structures
589 rdp_attach(struct isa_device *isa_dev)
591 int unit = isa_dev->id_unit;
592 struct rdp_softc *sc = &rdp_softc[unit];
593 struct ifnet *ifp = &sc->arpcom.ac_if;
595 isa_dev->id_intr = (inthand2_t *)rdpintr;
603 * Initialize ifnet structure
606 if_initname(ifp, "rdp", unit);
607 ifp->if_start = rdp_start;
608 ifp->if_ioctl = rdp_ioctl;
609 ifp->if_watchdog = rdp_watchdog;
610 ifp->if_init = rdp_init;
611 ifq_set_maxlen(&ifp->if_snd, IFQ_MAXLEN);
612 ifq_set_ready(&ifp->if_snd);
613 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
616 * Attach the interface
618 ether_ifattach(ifp, sc->arpcom.ac_enaddr, NULL);
621 * Print additional info when attached
623 kprintf("%s: RealTek RTL%s pocket ethernet, EEPROM %s, %s mode\n",
625 "8002", /* hook for 8012 */
626 sc->eeprom == EEPROM_93C46? "93C46": "74S288",
627 sc->slow? "slow": "fast");
636 rdp_reset(struct ifnet *ifp)
638 struct rdp_softc *sc = ifp->if_softc;
643 * Stop interface and re-initialize.
652 * Take interface offline.
655 rdp_stop(struct rdp_softc *sc)
658 sc->txbusy = sc->txbusy = 0;
660 /* disable printer interface interrupts */
662 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
663 outb(sc->baseaddr + lpt_data, 0xff);
665 /* reset the RTL 8002 */
666 WrNib(sc, CMR1 + HNib, MkHi(CMR1_RST));
671 * Device timeout/watchdog routine. Entered if the device neglects to
672 * generate an interrupt after a transmit has been started on it.
675 rdp_watchdog(struct ifnet *ifp)
678 log(LOG_ERR, "%s: device timeout\n", ifp->if_xname);
690 struct rdp_softc *sc = xsc;
691 struct ifnet *ifp = &sc->arpcom.ac_if;
699 /* program ethernet ID into the chip */
700 for (i = 0, reg = IDR0; i < 6; i++, reg++)
701 WrByte(sc, reg, sc->arpcom.ac_enaddr[i]);
703 /* set accept mode */
704 WrNib(sc, CMR2 + HNib,
705 MkHi((ifp->if_flags & IFF_PROMISC)? CMR2_AM_ALL: CMR2_AM_PB));
707 /* enable tx and rx */
708 WrNib(sc, CMR1 + HNib, MkHi(CMR1_TE | CMR1_RE));
710 /* allow interrupts to happen */
711 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
712 WrNib(sc, IMR, ISR_TOK | ISR_TER | ISR_ROK | ISR_RER);
713 WrNib(sc, IMR + HNib, MkHi(ISR_RBER));
715 /* allow IRQs to pass the parallel interface */
716 sc->irqenbit = Ctrl_IRQEN;
717 outb(sc->baseaddr + lpt_control, sc->irqenbit + Ctrl_SelData);
719 /* clear all flags */
720 sc->txbusy = sc->txbuffered = 0;
723 * Set 'running' flag, and clear output active flag.
725 ifp->if_flags |= IFF_RUNNING;
726 ifp->if_flags &= ~IFF_OACTIVE;
729 * ...and attempt to start output
737 * Start output on interface.
738 * We make one assumption here:
739 * - that the IFF_OACTIVE flag is checked before this code is called
740 * (i.e. that the output part of the interface is idle)
743 rdp_start(struct ifnet *ifp)
745 struct rdp_softc *sc = ifp->if_softc;
752 * See if there is room to put another packet in the buffer.
754 if (sc->txbuffered) {
756 * No room. Indicate this to the outside world and exit.
758 ifp->if_flags |= IFF_OACTIVE;
761 m = ifq_dequeue(&ifp->if_snd, NULL);
764 * We are using the !OACTIVE flag to indicate to the outside
765 * world that we can accept an additional packet rather than
766 * that the transmitter is _actually_ active. Indeed, the
767 * transmitter may be active, but if we haven't filled all the
768 * buffers with data then we still want to accept more.
770 ifp->if_flags &= ~IFF_OACTIVE;
775 * Copy the mbuf chain into the transmit buffer
778 len = rdp_write_mbufs(sc, m);
782 /* ensure minimal valid ethernet length */
783 len = max(len, (ETHER_MIN_LEN-ETHER_CRC_LEN));
786 * Actually start the transceiver. Set a timeout in case the
787 * Tx interrupt never arrives.
790 WrNib(sc, TBCR1, len >> 8);
791 WrByte(sc, TBCR0, len & 0xff);
792 WrNib(sc, CMR1, CMR1_TRA);
805 * Loop back to the top to possibly buffer more packets
811 * Process an ioctl request.
814 rdp_ioctl(struct ifnet *ifp, IOCTL_CMD_T command, caddr_t data,
817 struct rdp_softc *sc = ifp->if_softc;
825 * If the interface is marked up and stopped, then start it.
826 * If it is marked down and running, then stop it.
828 if (ifp->if_flags & IFF_UP) {
829 if ((ifp->if_flags & IFF_RUNNING) == 0)
832 if (ifp->if_flags & IFF_RUNNING) {
834 ifp->if_flags &= ~IFF_RUNNING;
839 * Promiscuous flag may have changed, propagage this
842 if (ifp->if_flags & IFF_UP)
843 WrNib(sc, CMR2 + HNib,
844 MkHi((ifp->if_flags & IFF_PROMISC)?
845 CMR2_AM_ALL: CMR2_AM_PB));
852 * Multicast list has changed; we don't support it.
858 error = ether_ioctl(ifp, command, data);
868 * External interrupt service routine.
874 struct rdp_softc *sc = rdp_softc + unit;
875 struct ifnet *ifp = (struct ifnet *)sc;
876 u_char isr, tsr, rsr, colls;
878 lwkt_serialize_enter(ifp->if_serializer);
880 /* disable interrupts, so SD3 can be routed to the pin */
882 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
883 WrNib(sc, CMR2, CMR2_IRQINV);
885 * loop until there are no more new interrupts
888 isr = RdNib(sc, ISR);
889 isr |= RdNib(sc, ISR + HNib) << 4;
890 RdEnd(sc, ISR + HNib);
895 kprintf("rdp%d: ISR = %#x\n", unit, isr);
899 * Clear the pending interrupt bits.
901 WrNib(sc, ISR, isr & 0x0f);
903 WrNib(sc, ISR + HNib, MkHi(isr));
906 * Handle transmitter interrupts.
908 if (isr & (ISR_TOK | ISR_TER)) {
909 tsr = RdNib(sc, TSR);
913 kprintf("rdp%d: tsr %#x\n", unit, tsr);
919 * Update total number of successfully
920 * transmitted packets.
925 colls = RdNib(sc, COLR);
927 ifp->if_collisions += colls;
931 * reset tx busy and output active flags
934 ifp->if_flags &= ~IFF_OACTIVE;
937 * If we had already queued up another packet,
938 * start sending it now.
940 if (sc->txbuffered) {
941 WrNib(sc, TBCR1, sc->txsize >> 8);
942 WrByte(sc, TBCR0, sc->txsize & 0xff);
943 WrNib(sc, CMR1, CMR1_TRA);
949 * clear watchdog timer
957 * Handle receiver interrupts
959 if (isr & (ISR_ROK | ISR_RER | ISR_RBER)) {
960 rsr = RdNib(sc, RSR);
961 rsr |= RdNib(sc, RSR + HNib) << 4;
962 RdEnd(sc, RSR + HNib);
964 if (isr & (ISR_RER | ISR_RBER))
965 kprintf("rdp%d: rsr %#x\n", unit, rsr);
968 if (rsr & (RSR_PUN | RSR_POV)) {
969 kprintf("rdp%d: rsr %#x, resetting\n",
977 * CRC and FA errors are recorded in
978 * rdp_rint() on a per-packet basis
981 if (isr & (ISR_ROK | ISR_RER))
986 * If it looks like the transmitter can take more data,
987 * attempt to start output on the interface. This is done
988 * after handling the receiver to give the receiver priority.
990 if ((ifp->if_flags & IFF_OACTIVE) == 0)
994 /* re-enable interrupts */
995 WrNib(sc, CMR2, CMR2_IRQOUT | CMR2_IRQINV);
996 sc->irqenbit = Ctrl_IRQEN;
997 outb(sc->baseaddr + lpt_control, Ctrl_SelData + sc->irqenbit);
998 lwkt_serialize_exit(ifp->if_serializer);
1002 * Ethernet interface receiver interrupt.
1005 rdp_rint(struct rdp_softc *sc)
1007 struct ifnet *ifp = &sc->arpcom.ac_if;
1011 u_char *packet_ptr, b, status;
1012 int excessive_bad_pkts = 0;
1015 * Fetch the packets from the NIC's buffer.
1018 b = RdNib(sc, CMR1);
1022 /* no more packets */
1025 /* first, obtain the buffer header */
1027 outb(sc->baseaddr + lpt_data, MAR + EOC); /* prepare addr */
1028 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1029 outb(sc->baseaddr + lpt_data, MAR + RdAddr + HNib);
1031 packet_ptr = (u_char *)&rh;
1033 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1034 *packet_ptr = RdByteA2(sc);
1036 for (i = 0; i < sizeof rh; i++, packet_ptr++)
1037 *packet_ptr = RdByteA1(sc);
1039 RdEnd(sc, MAR + HNib);
1040 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1042 len = rh.pktlen - ETHER_CRC_LEN;
1045 if ((status & (RSR_ROK | RSR_CRC | RSR_FA)) != RSR_ROK ||
1046 len > (ETHER_MAX_LEN - ETHER_CRC_LEN) ||
1047 len < (ETHER_MIN_LEN - ETHER_CRC_LEN) ||
1050 kprintf("%s: bad packet in buffer, "
1051 "len %d, status %#x\n",
1052 ifp->if_xname, (int)len, (int)status);
1055 /* rx jump packet */
1056 WrNib(sc, CMR1, CMR1_RDPAC);
1057 if (++excessive_bad_pkts > 5) {
1059 * the chip seems to be stuck, we are
1060 * probably seeing the same bad packet
1061 * over and over again
1064 kprintf("%s: resetting due to an "
1065 "excessive number of bad packets\n",
1077 excessive_bad_pkts = 0;
1078 rdp_get_packet(sc, len);
1084 * Retreive packet from NIC memory and send to the next level up via
1088 rdp_get_packet(struct rdp_softc *sc, unsigned len)
1090 struct ifnet *ifp = &sc->arpcom.ac_if;
1095 /* Allocate a header mbuf */
1096 MGETHDR(m, MB_DONTWAIT, MT_DATA);
1099 m->m_pkthdr.rcvif = ifp;
1100 m->m_pkthdr.len = m->m_len = len;
1103 * We always put the received packet in a single buffer -
1104 * either with just an mbuf header or in a cluster attached
1105 * to the header. The +2 is to compensate for the alignment
1108 if ((len + 2) > MHLEN) {
1109 /* Attach an mbuf cluster */
1110 MCLGET(m, MB_DONTWAIT);
1112 /* Insist on getting a cluster */
1113 if ((m->m_flags & M_EXT) == 0) {
1120 * The +2 is to longword align the start of the real packet.
1121 * This is important for NFS.
1126 * Get packet, including link layer address, from interface.
1128 outb(sc->baseaddr + lpt_control, Ctrl_LNibRead);
1129 outb(sc->baseaddr + lpt_data, RdAddr + MAR);
1131 packet_ptr = mtod(m, u_char *);
1133 for (s = 0; s < len; s++, packet_ptr++)
1134 *packet_ptr = RdByteA2(sc);
1136 for (s = 0; s < len; s++, packet_ptr++)
1137 *packet_ptr = RdByteA1(sc);
1139 RdEnd(sc, MAR + HNib);
1140 outb(sc->baseaddr + lpt_control, Ctrl_SelData);
1141 WrNib(sc, CMR1, CMR1_RDPAC);
1143 ifp->if_input(ifp, m);
1147 * Write an mbuf chain to the NIC's tx buffer.
1150 rdp_write_mbufs(struct rdp_softc *sc, struct mbuf *m)
1157 /* First, count up the total number of bytes to copy */
1158 for (total_len = 0, mp = m; mp; mp = mp->m_next)
1159 total_len += mp->m_len;
1164 outb(sc->baseaddr + lpt_data, MAR | EOC);
1167 * Transfer the mbuf chain to the NIC memory.
1170 /* writing the first byte is complicated */
1171 outb(sc->baseaddr + lpt_control,
1172 Ctrl_LNibRead | sc->irqenbit);
1173 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1174 b = *(u_char *)m->m_data;
1175 outb(sc->baseaddr + lpt_data, (b & 0x0f) | 0x40);
1176 outb(sc->baseaddr + lpt_data, b & 0x0f);
1177 outb(sc->baseaddr + lpt_data, b >> 4);
1178 outb(sc->baseaddr + lpt_control,
1179 Ctrl_HNibRead | sc->irqenbit);
1180 /* advance the mbuf pointer */
1184 /* write the remaining bytes */
1186 for (i = 0, dp = (u_char *)m->m_data;
1189 WrByteALToDRAMA(sc, *dp);
1193 * restore old mbuf in case we have to hand it off to
1200 /* the RTL 8002 requires an even byte-count remote DMA */
1202 WrByteALToDRAMA(sc, 0);
1204 outb(sc->baseaddr + lpt_data, MAR | WrAddr);
1206 for (i = 0, dp = (u_char *)m->m_data;
1209 WrByteALToDRAM(sc, *dp);
1213 /* the RTL 8002 requires an even byte-count remote DMA */
1215 WrByteALToDRAM(sc, 0);
1218 outb(sc->baseaddr + lpt_data, 0xff);
1219 outb(sc->baseaddr + lpt_control,
1220 Ctrl_HNibRead | Ctrl_SelData | sc->irqenbit);
1226 * Read the designated ethernet hardware address out of a 93C46
1228 * Note that the 93C46 uses 16-bit words in big-endian notation.
1231 rdp_gethwaddr_93c46(struct rdp_softc *sc, u_char *etheraddr)
1237 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1240 * The original RealTek packet driver had the ethernet address
1241 * starting at EEPROM address 0. Other vendors seem to have
1242 * gone `creative' here -- while they didn't do anything else
1243 * than changing a few strings in the entire driver, compared
1244 * to the RealTek version, they also moved out the ethernet
1245 * address to a different location in the EEPROM, so the
1246 * original RealTek driver won't work correctly with them, and
1247 * vice versa. Sounds pretty cool, eh? $@%&!
1249 * Anyway, we walk through the EEPROM, until we find some
1250 * allowable value based upon our table of IEEE OUI assignments.
1252 for (i = magic = 0; magic < 3 && i < 32; i++) {
1253 /* read cmd (+ 6 bit address) */
1254 rdp_93c46_cmd(sc, 0x180 + i, 10);
1255 w = rdp_93c46_read(sc);
1259 j < sizeof allowed_ouis / sizeof(u_short);
1261 if (w == allowed_ouis[j]) {
1262 etheraddr[0] = (w >> 8) & 0xff;
1263 etheraddr[1] = w & 0xff;
1271 * If the first two bytes have been 00:00, we
1272 * discard the match iff the next two bytes
1273 * are also 00:00, so we won't get fooled by
1274 * an EEPROM that has been filled with zeros.
1275 * This in theory would disallow 64 K of legal
1276 * addresses assigned to Xerox, but it's
1277 * almost certain that those addresses haven't
1278 * been used for RTL80[01]2 chips anyway.
1280 if ((etheraddr[0] | etheraddr[1]) == 0 && w == 0) {
1285 etheraddr[2] = (w >> 8) & 0xff;
1286 etheraddr[3] = w & 0xff;
1291 etheraddr[4] = (w >> 8) & 0xff;
1292 etheraddr[5] = w & 0xff;
1298 WrNib(sc, CMR2, CMR2_IRQINV); /* back to page 0 */
1304 * Read the designated ethernet hardware address out of a 74S288
1307 * This is untested, since i haven't seen any adapter actually using
1308 * a 74S288. In the RTL 8012, only the serial EEPROM (94C46) is
1309 * supported anymore.
1312 rdp_gethwaddr_74s288(struct rdp_softc *sc, u_char *etheraddr)
1317 WrNib(sc, CMR2, CMR2_PAGE | CMR2_IRQINV); /* select page 1 */
1319 for (i = 0; i < 6; i++) {
1320 WrNib(sc, PCMR, i & 0x0f); /* lower 4 bit of addr */
1321 WrNib(sc, PCMR + HNib, HNib + 4); /* upper 2 bit addr + /CS */
1322 WrNib(sc, PCMR + HNib, HNib); /* latch data now */
1323 b = RdNib(sc, PDR) & 0x0f;
1324 b |= (RdNib(sc, PDR + HNib) & 0x0f) << 4;
1328 RdEnd(sc, PDR + HNib);
1329 WrNib(sc, CMR2, CMR2_IRQINV); /* reselect page 0 */
1333 * Send nbits of data (starting with MSB) out to the 93c46 as a
1334 * command. Assumes register page 1 has already been selected.
1337 rdp_93c46_cmd(struct rdp_softc *sc, u_short data, unsigned nbits)
1339 u_short mask = 1 << (nbits - 1);
1344 kprintf("rdp_93c46_cmd(): ");
1346 for (i = 0; i < nbits; i++, mask >>= 1) {
1347 b = HNib + PCMR_SK + PCMR_CS;
1351 kprintf("%d", b & 1);
1353 WrNib(sc, PCMR + HNib, b);
1355 WrNib(sc, PCMR + HNib, b & ~PCMR_SK);
1364 * Read one word of data from the 93c46. Actually, we have to read
1365 * 17 bits, and discard the very first bit. Assumes register page 1
1366 * to be selected as well.
1369 rdp_93c46_read(struct rdp_softc *sc)
1376 kprintf("rdp_93c46_read(): ");
1378 for (i = 0; i < 17; i++) {
1379 WrNib(sc, PCMR + HNib, PCMR_SK + PCMR_CS + HNib);
1381 WrNib(sc, PCMR + HNib, PCMR_CS + HNib);
1388 kprintf("%d", b & 1);
1398 WrNib(sc, PCMR + HNib, PCMR_SK + HNib);