fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / net / 3c501.c
blobbe71868d15132d06fe28e062798ae19e0f255f17
1 /* 3c501.c: A 3Com 3c501 Ethernet driver for Linux. */
2 /*
3 Written 1992,1993,1994 Donald Becker
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency. This software may be used and
7 distributed according to the terms of the GNU General Public License,
8 incorporated herein by reference.
10 This is a device driver for the 3Com Etherlink 3c501.
11 Do not purchase this card, even as a joke. It's performance is horrible,
12 and it breaks in many ways.
14 The original author may be reached as becker@scyld.com, or C/O
15 Scyld Computing Corporation
16 410 Severn Ave., Suite 210
17 Annapolis MD 21403
19 Fixed (again!) the missing interrupt locking on TX/RX shifting.
20 Alan Cox <Alan.Cox@linux.org>
22 Removed calls to init_etherdev since they are no longer needed, and
23 cleaned up modularization just a bit. The driver still allows only
24 the default address for cards when loaded as a module, but that's
25 really less braindead than anyone using a 3c501 board. :)
26 19950208 (invid@msen.com)
28 Added traps for interrupts hitting the window as we clear and TX load
29 the board. Now getting 150K/second FTP with a 3c501 card. Still playing
30 with a TX-TX optimisation to see if we can touch 180-200K/second as seems
31 theoretically maximum.
32 19950402 Alan Cox <Alan.Cox@linux.org>
34 Cleaned up for 2.3.x because we broke SMP now.
35 20000208 Alan Cox <alan@redhat.com>
37 Check up pass for 2.5. Nothing significant changed
38 20021009 Alan Cox <alan@redhat.com>
40 Fixed zero fill corner case
41 20030104 Alan Cox <alan@redhat.com>
44 For the avoidance of doubt the "preferred form" of this code is one which
45 is in an open non patent encumbered format. Where cryptographic key signing
46 forms part of the process of creating an executable the information
47 including keys needed to generate an equivalently functional executable
48 are deemed to be part of the source code.
53 /**
54 * DOC: 3c501 Card Notes
56 * Some notes on this thing if you have to hack it. [Alan]
58 * Some documentation is available from 3Com. Due to the boards age
59 * standard responses when you ask for this will range from 'be serious'
60 * to 'give it to a museum'. The documentation is incomplete and mostly
61 * of historical interest anyway.
63 * The basic system is a single buffer which can be used to receive or
64 * transmit a packet. A third command mode exists when you are setting
65 * things up.
67 * If it's transmitting it's not receiving and vice versa. In fact the
68 * time to get the board back into useful state after an operation is
69 * quite large.
71 * The driver works by keeping the board in receive mode waiting for a
72 * packet to arrive. When one arrives it is copied out of the buffer
73 * and delivered to the kernel. The card is reloaded and off we go.
75 * When transmitting lp->txing is set and the card is reset (from
76 * receive mode) [possibly losing a packet just received] to command
77 * mode. A packet is loaded and transmit mode triggered. The interrupt
78 * handler runs different code for transmit interrupts and can handle
79 * returning to receive mode or retransmissions (yes you have to help
80 * out with those too).
82 * DOC: Problems
84 * There are a wide variety of undocumented error returns from the card
85 * and you basically have to kick the board and pray if they turn up. Most
86 * only occur under extreme load or if you do something the board doesn't
87 * like (eg touching a register at the wrong time).
89 * The driver is less efficient than it could be. It switches through
90 * receive mode even if more transmits are queued. If this worries you buy
91 * a real Ethernet card.
93 * The combination of slow receive restart and no real multicast
94 * filter makes the board unusable with a kernel compiled for IP
95 * multicasting in a real multicast environment. That's down to the board,
96 * but even with no multicast programs running a multicast IP kernel is
97 * in group 224.0.0.1 and you will therefore be listening to all multicasts.
98 * One nv conference running over that Ethernet and you can give up.
102 #define DRV_NAME "3c501"
103 #define DRV_VERSION "2002/10/09"
106 static const char version[] =
107 DRV_NAME ".c: " DRV_VERSION " Alan Cox (alan@redhat.com).\n";
110 * Braindamage remaining:
111 * The 3c501 board.
114 #include <linux/module.h>
116 #include <linux/kernel.h>
117 #include <linux/fcntl.h>
118 #include <linux/ioport.h>
119 #include <linux/interrupt.h>
120 #include <linux/slab.h>
121 #include <linux/string.h>
122 #include <linux/errno.h>
123 #include <linux/spinlock.h>
124 #include <linux/ethtool.h>
125 #include <linux/delay.h>
126 #include <linux/bitops.h>
128 #include <asm/uaccess.h>
129 #include <asm/io.h>
131 #include <linux/netdevice.h>
132 #include <linux/etherdevice.h>
133 #include <linux/skbuff.h>
134 #include <linux/init.h>
136 #include "3c501.h"
139 * The boilerplate probe code.
142 static int io=0x280;
143 static int irq=5;
144 static int mem_start;
147 * el1_probe: - probe for a 3c501
148 * @dev: The device structure passed in to probe.
150 * This can be called from two places. The network layer will probe using
151 * a device structure passed in with the probe information completed. For a
152 * modular driver we use #init_module to fill in our own structure and probe
153 * for it.
155 * Returns 0 on success. ENXIO if asked not to probe and ENODEV if asked to
156 * probe and failing to find anything.
159 struct net_device * __init el1_probe(int unit)
161 struct net_device *dev = alloc_etherdev(sizeof(struct net_local));
162 static unsigned ports[] = { 0x280, 0x300, 0};
163 unsigned *port;
164 int err = 0;
166 if (!dev)
167 return ERR_PTR(-ENOMEM);
169 if (unit >= 0) {
170 sprintf(dev->name, "eth%d", unit);
171 netdev_boot_setup_check(dev);
172 io = dev->base_addr;
173 irq = dev->irq;
174 mem_start = dev->mem_start & 7;
177 if (io > 0x1ff) { /* Check a single specified location. */
178 err = el1_probe1(dev, io);
179 } else if (io != 0) {
180 err = -ENXIO; /* Don't probe at all. */
181 } else {
182 for (port = ports; *port && el1_probe1(dev, *port); port++)
184 if (!*port)
185 err = -ENODEV;
187 if (err)
188 goto out;
189 err = register_netdev(dev);
190 if (err)
191 goto out1;
192 return dev;
193 out1:
194 release_region(dev->base_addr, EL1_IO_EXTENT);
195 out:
196 free_netdev(dev);
197 return ERR_PTR(err);
201 * el1_probe1:
202 * @dev: The device structure to use
203 * @ioaddr: An I/O address to probe at.
205 * The actual probe. This is iterated over by #el1_probe in order to
206 * check all the applicable device locations.
208 * Returns 0 for a success, in which case the device is activated,
209 * EAGAIN if the IRQ is in use by another driver, and ENODEV if the
210 * board cannot be found.
213 static int __init el1_probe1(struct net_device *dev, int ioaddr)
215 struct net_local *lp;
216 const char *mname; /* Vendor name */
217 unsigned char station_addr[6];
218 int autoirq = 0;
219 int i;
222 * Reserve I/O resource for exclusive use by this driver
225 if (!request_region(ioaddr, EL1_IO_EXTENT, DRV_NAME))
226 return -ENODEV;
229 * Read the station address PROM data from the special port.
232 for (i = 0; i < 6; i++)
234 outw(i, ioaddr + EL1_DATAPTR);
235 station_addr[i] = inb(ioaddr + EL1_SAPROM);
238 * Check the first three octets of the S.A. for 3Com's prefix, or
239 * for the Sager NP943 prefix.
242 if (station_addr[0] == 0x02 && station_addr[1] == 0x60
243 && station_addr[2] == 0x8c)
245 mname = "3c501";
246 } else if (station_addr[0] == 0x00 && station_addr[1] == 0x80
247 && station_addr[2] == 0xC8)
249 mname = "NP943";
251 else {
252 release_region(ioaddr, EL1_IO_EXTENT);
253 return -ENODEV;
257 * We auto-IRQ by shutting off the interrupt line and letting it float
258 * high.
261 dev->irq = irq;
263 if (dev->irq < 2)
265 unsigned long irq_mask;
267 irq_mask = probe_irq_on();
268 inb(RX_STATUS); /* Clear pending interrupts. */
269 inb(TX_STATUS);
270 outb(AX_LOOP + 1, AX_CMD);
272 outb(0x00, AX_CMD);
274 mdelay(20);
275 autoirq = probe_irq_off(irq_mask);
277 if (autoirq == 0)
279 printk(KERN_WARNING "%s probe at %#x failed to detect IRQ line.\n",
280 mname, ioaddr);
281 release_region(ioaddr, EL1_IO_EXTENT);
282 return -EAGAIN;
286 outb(AX_RESET+AX_LOOP, AX_CMD); /* Loopback mode. */
287 dev->base_addr = ioaddr;
288 memcpy(dev->dev_addr, station_addr, ETH_ALEN);
290 if (mem_start & 0xf)
291 el_debug = mem_start & 0x7;
292 if (autoirq)
293 dev->irq = autoirq;
295 printk(KERN_INFO "%s: %s EtherLink at %#lx, using %sIRQ %d.\n", dev->name, mname, dev->base_addr,
296 autoirq ? "auto":"assigned ", dev->irq);
298 #ifdef CONFIG_IP_MULTICAST
299 printk(KERN_WARNING "WARNING: Use of the 3c501 in a multicast kernel is NOT recommended.\n");
300 #endif
302 if (el_debug)
303 printk(KERN_DEBUG "%s", version);
305 memset(dev->priv, 0, sizeof(struct net_local));
306 lp = netdev_priv(dev);
307 spin_lock_init(&lp->lock);
310 * The EL1-specific entries in the device structure.
313 dev->open = &el_open;
314 dev->hard_start_xmit = &el_start_xmit;
315 dev->tx_timeout = &el_timeout;
316 dev->watchdog_timeo = HZ;
317 dev->stop = &el1_close;
318 dev->set_multicast_list = &set_multicast_list;
319 dev->ethtool_ops = &netdev_ethtool_ops;
320 return 0;
324 * el1_open:
325 * @dev: device that is being opened
327 * When an ifconfig is issued which changes the device flags to include
328 * IFF_UP this function is called. It is only called when the change
329 * occurs, not when the interface remains up. #el1_close will be called
330 * when it goes down.
332 * Returns 0 for a successful open, or -EAGAIN if someone has run off
333 * with our interrupt line.
336 static int el_open(struct net_device *dev)
338 int retval;
339 int ioaddr = dev->base_addr;
340 struct net_local *lp = netdev_priv(dev);
341 unsigned long flags;
343 if (el_debug > 2)
344 printk(KERN_DEBUG "%s: Doing el_open()...", dev->name);
346 if ((retval = request_irq(dev->irq, &el_interrupt, 0, dev->name, dev)))
347 return retval;
349 spin_lock_irqsave(&lp->lock, flags);
350 el_reset(dev);
351 spin_unlock_irqrestore(&lp->lock, flags);
353 lp->txing = 0; /* Board in RX mode */
354 outb(AX_RX, AX_CMD); /* Aux control, irq and receive enabled */
355 netif_start_queue(dev);
356 return 0;
360 * el_timeout:
361 * @dev: The 3c501 card that has timed out
363 * Attempt to restart the board. This is basically a mixture of extreme
364 * violence and prayer
368 static void el_timeout(struct net_device *dev)
370 struct net_local *lp = netdev_priv(dev);
371 int ioaddr = dev->base_addr;
373 if (el_debug)
374 printk (KERN_DEBUG "%s: transmit timed out, txsr %#2x axsr=%02x rxsr=%02x.\n",
375 dev->name, inb(TX_STATUS), inb(AX_STATUS), inb(RX_STATUS));
376 dev->stats.tx_errors++;
377 outb(TX_NORM, TX_CMD);
378 outb(RX_NORM, RX_CMD);
379 outb(AX_OFF, AX_CMD); /* Just trigger a false interrupt. */
380 outb(AX_RX, AX_CMD); /* Aux control, irq and receive enabled */
381 lp->txing = 0; /* Ripped back in to RX */
382 netif_wake_queue(dev);
387 * el_start_xmit:
388 * @skb: The packet that is queued to be sent
389 * @dev: The 3c501 card we want to throw it down
391 * Attempt to send a packet to a 3c501 card. There are some interesting
392 * catches here because the 3c501 is an extremely old and therefore
393 * stupid piece of technology.
395 * If we are handling an interrupt on the other CPU we cannot load a packet
396 * as we may still be attempting to retrieve the last RX packet buffer.
398 * When a transmit times out we dump the card into control mode and just
399 * start again. It happens enough that it isnt worth logging.
401 * We avoid holding the spin locks when doing the packet load to the board.
402 * The device is very slow, and its DMA mode is even slower. If we held the
403 * lock while loading 1500 bytes onto the controller we would drop a lot of
404 * serial port characters. This requires we do extra locking, but we have
405 * no real choice.
408 static int el_start_xmit(struct sk_buff *skb, struct net_device *dev)
410 struct net_local *lp = netdev_priv(dev);
411 int ioaddr = dev->base_addr;
412 unsigned long flags;
415 * Avoid incoming interrupts between us flipping txing and flipping
416 * mode as the driver assumes txing is a faithful indicator of card
417 * state
420 spin_lock_irqsave(&lp->lock, flags);
423 * Avoid timer-based retransmission conflicts.
426 netif_stop_queue(dev);
430 int len = skb->len;
431 int pad = 0;
432 int gp_start;
433 unsigned char *buf = skb->data;
435 if (len < ETH_ZLEN)
436 pad = ETH_ZLEN - len;
438 gp_start = 0x800 - ( len + pad );
440 lp->tx_pkt_start = gp_start;
441 lp->collisions = 0;
443 dev->stats.tx_bytes += skb->len;
446 * Command mode with status cleared should [in theory]
447 * mean no more interrupts can be pending on the card.
450 outb_p(AX_SYS, AX_CMD);
451 inb_p(RX_STATUS);
452 inb_p(TX_STATUS);
454 lp->loading = 1;
455 lp->txing = 1;
458 * Turn interrupts back on while we spend a pleasant afternoon
459 * loading bytes into the board
462 spin_unlock_irqrestore(&lp->lock, flags);
464 outw(0x00, RX_BUF_CLR); /* Set rx packet area to 0. */
465 outw(gp_start, GP_LOW); /* aim - packet will be loaded into buffer start */
466 outsb(DATAPORT,buf,len); /* load buffer (usual thing each byte increments the pointer) */
467 if (pad) {
468 while(pad--) /* Zero fill buffer tail */
469 outb(0, DATAPORT);
471 outw(gp_start, GP_LOW); /* the board reuses the same register */
473 if(lp->loading != 2)
475 outb(AX_XMIT, AX_CMD); /* fire ... Trigger xmit. */
476 lp->loading=0;
477 dev->trans_start = jiffies;
478 if (el_debug > 2)
479 printk(KERN_DEBUG " queued xmit.\n");
480 dev_kfree_skb (skb);
481 return 0;
483 /* A receive upset our load, despite our best efforts */
484 if(el_debug>2)
485 printk(KERN_DEBUG "%s: burped during tx load.\n", dev->name);
486 spin_lock_irqsave(&lp->lock, flags);
488 while(1);
493 * el_interrupt:
494 * @irq: Interrupt number
495 * @dev_id: The 3c501 that burped
497 * Handle the ether interface interrupts. The 3c501 needs a lot more
498 * hand holding than most cards. In particular we get a transmit interrupt
499 * with a collision error because the board firmware isnt capable of rewinding
500 * its own transmit buffer pointers. It can however count to 16 for us.
502 * On the receive side the card is also very dumb. It has no buffering to
503 * speak of. We simply pull the packet out of its PIO buffer (which is slow)
504 * and queue it for the kernel. Then we reset the card for the next packet.
506 * We sometimes get surprise interrupts late both because the SMP IRQ delivery
507 * is message passing and because the card sometimes seems to deliver late. I
508 * think if it is part way through a receive and the mode is changed it carries
509 * on receiving and sends us an interrupt. We have to band aid all these cases
510 * to get a sensible 150kBytes/second performance. Even then you want a small
511 * TCP window.
514 static irqreturn_t el_interrupt(int irq, void *dev_id)
516 struct net_device *dev = dev_id;
517 struct net_local *lp;
518 int ioaddr;
519 int axsr; /* Aux. status reg. */
521 ioaddr = dev->base_addr;
522 lp = netdev_priv(dev);
524 spin_lock(&lp->lock);
527 * What happened ?
530 axsr = inb(AX_STATUS);
533 * Log it
536 if (el_debug > 3)
537 printk(KERN_DEBUG "%s: el_interrupt() aux=%#02x", dev->name, axsr);
539 if(lp->loading==1 && !lp->txing)
540 printk(KERN_WARNING "%s: Inconsistent state loading while not in tx\n",
541 dev->name);
543 if (lp->txing)
547 * Board in transmit mode. May be loading. If we are
548 * loading we shouldn't have got this.
551 int txsr = inb(TX_STATUS);
553 if(lp->loading==1)
555 if(el_debug > 2)
557 printk(KERN_DEBUG "%s: Interrupt while loading [", dev->name);
558 printk(KERN_DEBUG " txsr=%02x gp=%04x rp=%04x]\n", txsr, inw(GP_LOW),inw(RX_LOW));
560 lp->loading=2; /* Force a reload */
561 spin_unlock(&lp->lock);
562 goto out;
565 if (el_debug > 6)
566 printk(KERN_DEBUG " txsr=%02x gp=%04x rp=%04x", txsr, inw(GP_LOW),inw(RX_LOW));
568 if ((axsr & 0x80) && (txsr & TX_READY) == 0)
571 * FIXME: is there a logic to whether to keep on trying or
572 * reset immediately ?
574 if(el_debug>1)
575 printk(KERN_DEBUG "%s: Unusual interrupt during Tx, txsr=%02x axsr=%02x"
576 " gp=%03x rp=%03x.\n", dev->name, txsr, axsr,
577 inw(ioaddr + EL1_DATAPTR), inw(ioaddr + EL1_RXPTR));
578 lp->txing = 0;
579 netif_wake_queue(dev);
581 else if (txsr & TX_16COLLISIONS)
584 * Timed out
586 if (el_debug)
587 printk (KERN_DEBUG "%s: Transmit failed 16 times, Ethernet jammed?\n",dev->name);
588 outb(AX_SYS, AX_CMD);
589 lp->txing = 0;
590 dev->stats.tx_aborted_errors++;
591 netif_wake_queue(dev);
593 else if (txsr & TX_COLLISION)
596 * Retrigger xmit.
599 if (el_debug > 6)
600 printk(KERN_DEBUG " retransmitting after a collision.\n");
602 * Poor little chip can't reset its own start pointer
605 outb(AX_SYS, AX_CMD);
606 outw(lp->tx_pkt_start, GP_LOW);
607 outb(AX_XMIT, AX_CMD);
608 dev->stats.collisions++;
609 spin_unlock(&lp->lock);
610 goto out;
612 else
615 * It worked.. we will now fall through and receive
617 dev->stats.tx_packets++;
618 if (el_debug > 6)
619 printk(KERN_DEBUG " Tx succeeded %s\n",
620 (txsr & TX_RDY) ? "." : "but tx is busy!");
622 * This is safe the interrupt is atomic WRT itself.
625 lp->txing = 0;
626 netif_wake_queue(dev); /* In case more to transmit */
629 else
632 * In receive mode.
635 int rxsr = inb(RX_STATUS);
636 if (el_debug > 5)
637 printk(KERN_DEBUG " rxsr=%02x txsr=%02x rp=%04x", rxsr, inb(TX_STATUS),inw(RX_LOW));
639 * Just reading rx_status fixes most errors.
641 if (rxsr & RX_MISSED)
642 dev->stats.rx_missed_errors++;
643 else if (rxsr & RX_RUNT)
644 { /* Handled to avoid board lock-up. */
645 dev->stats.rx_length_errors++;
646 if (el_debug > 5)
647 printk(KERN_DEBUG " runt.\n");
649 else if (rxsr & RX_GOOD)
652 * Receive worked.
654 el_receive(dev);
656 else
659 * Nothing? Something is broken!
661 if (el_debug > 2)
662 printk(KERN_DEBUG "%s: No packet seen, rxsr=%02x **resetting 3c501***\n",
663 dev->name, rxsr);
664 el_reset(dev);
666 if (el_debug > 3)
667 printk(KERN_DEBUG ".\n");
671 * Move into receive mode
674 outb(AX_RX, AX_CMD);
675 outw(0x00, RX_BUF_CLR);
676 inb(RX_STATUS); /* Be certain that interrupts are cleared. */
677 inb(TX_STATUS);
678 spin_unlock(&lp->lock);
679 out:
680 return IRQ_HANDLED;
685 * el_receive:
686 * @dev: Device to pull the packets from
688 * We have a good packet. Well, not really "good", just mostly not broken.
689 * We must check everything to see if it is good. In particular we occasionally
690 * get wild packet sizes from the card. If the packet seems sane we PIO it
691 * off the card and queue it for the protocol layers.
694 static void el_receive(struct net_device *dev)
696 int ioaddr = dev->base_addr;
697 int pkt_len;
698 struct sk_buff *skb;
700 pkt_len = inw(RX_LOW);
702 if (el_debug > 4)
703 printk(KERN_DEBUG " el_receive %d.\n", pkt_len);
705 if ((pkt_len < 60) || (pkt_len > 1536))
707 if (el_debug)
708 printk(KERN_DEBUG "%s: bogus packet, length=%d\n", dev->name, pkt_len);
709 dev->stats.rx_over_errors++;
710 return;
714 * Command mode so we can empty the buffer
717 outb(AX_SYS, AX_CMD);
718 skb = dev_alloc_skb(pkt_len+2);
721 * Start of frame
724 outw(0x00, GP_LOW);
725 if (skb == NULL)
727 printk(KERN_INFO "%s: Memory squeeze, dropping packet.\n", dev->name);
728 dev->stats.rx_dropped++;
729 return;
731 else
733 skb_reserve(skb,2); /* Force 16 byte alignment */
735 * The read increments through the bytes. The interrupt
736 * handler will fix the pointer when it returns to
737 * receive mode.
739 insb(DATAPORT, skb_put(skb,pkt_len), pkt_len);
740 skb->protocol=eth_type_trans(skb,dev);
741 netif_rx(skb);
742 dev->last_rx = jiffies;
743 dev->stats.rx_packets++;
744 dev->stats.rx_bytes+=pkt_len;
746 return;
750 * el_reset: Reset a 3c501 card
751 * @dev: The 3c501 card about to get zapped
753 * Even resetting a 3c501 isnt simple. When you activate reset it loses all
754 * its configuration. You must hold the lock when doing this. The function
755 * cannot take the lock itself as it is callable from the irq handler.
758 static void el_reset(struct net_device *dev)
760 struct net_local *lp = netdev_priv(dev);
761 int ioaddr = dev->base_addr;
763 if (el_debug> 2)
764 printk(KERN_INFO "3c501 reset...");
765 outb(AX_RESET, AX_CMD); /* Reset the chip */
766 outb(AX_LOOP, AX_CMD); /* Aux control, irq and loopback enabled */
768 int i;
769 for (i = 0; i < 6; i++) /* Set the station address. */
770 outb(dev->dev_addr[i], ioaddr + i);
773 outw(0, RX_BUF_CLR); /* Set rx packet area to 0. */
774 outb(TX_NORM, TX_CMD); /* tx irq on done, collision */
775 outb(RX_NORM, RX_CMD); /* Set Rx commands. */
776 inb(RX_STATUS); /* Clear status. */
777 inb(TX_STATUS);
778 lp->txing = 0;
782 * el1_close:
783 * @dev: 3c501 card to shut down
785 * Close a 3c501 card. The IFF_UP flag has been cleared by the user via
786 * the SIOCSIFFLAGS ioctl. We stop any further transmissions being queued,
787 * and then disable the interrupts. Finally we reset the chip. The effects
788 * of the rest will be cleaned up by #el1_open. Always returns 0 indicating
789 * a success.
792 static int el1_close(struct net_device *dev)
794 int ioaddr = dev->base_addr;
796 if (el_debug > 2)
797 printk(KERN_INFO "%s: Shutting down Ethernet card at %#x.\n", dev->name, ioaddr);
799 netif_stop_queue(dev);
802 * Free and disable the IRQ.
805 free_irq(dev->irq, dev);
806 outb(AX_RESET, AX_CMD); /* Reset the chip */
808 return 0;
812 * set_multicast_list:
813 * @dev: The device to adjust
815 * Set or clear the multicast filter for this adaptor to use the best-effort
816 * filtering supported. The 3c501 supports only three modes of filtering.
817 * It always receives broadcasts and packets for itself. You can choose to
818 * optionally receive all packets, or all multicast packets on top of this.
821 static void set_multicast_list(struct net_device *dev)
823 int ioaddr = dev->base_addr;
825 if(dev->flags&IFF_PROMISC)
827 outb(RX_PROM, RX_CMD);
828 inb(RX_STATUS);
830 else if (dev->mc_list || dev->flags&IFF_ALLMULTI)
832 outb(RX_MULT, RX_CMD); /* Multicast or all multicast is the same */
833 inb(RX_STATUS); /* Clear status. */
835 else
837 outb(RX_NORM, RX_CMD);
838 inb(RX_STATUS);
843 static void netdev_get_drvinfo(struct net_device *dev,
844 struct ethtool_drvinfo *info)
846 strcpy(info->driver, DRV_NAME);
847 strcpy(info->version, DRV_VERSION);
848 sprintf(info->bus_info, "ISA 0x%lx", dev->base_addr);
851 static u32 netdev_get_msglevel(struct net_device *dev)
853 return debug;
856 static void netdev_set_msglevel(struct net_device *dev, u32 level)
858 debug = level;
861 static const struct ethtool_ops netdev_ethtool_ops = {
862 .get_drvinfo = netdev_get_drvinfo,
863 .get_msglevel = netdev_get_msglevel,
864 .set_msglevel = netdev_set_msglevel,
867 #ifdef MODULE
869 static struct net_device *dev_3c501;
871 module_param(io, int, 0);
872 module_param(irq, int, 0);
873 MODULE_PARM_DESC(io, "EtherLink I/O base address");
874 MODULE_PARM_DESC(irq, "EtherLink IRQ number");
877 * init_module:
879 * When the driver is loaded as a module this function is called. We fake up
880 * a device structure with the base I/O and interrupt set as if it were being
881 * called from Space.c. This minimises the extra code that would otherwise
882 * be required.
884 * Returns 0 for success or -EIO if a card is not found. Returning an error
885 * here also causes the module to be unloaded
888 int __init init_module(void)
890 dev_3c501 = el1_probe(-1);
891 if (IS_ERR(dev_3c501))
892 return PTR_ERR(dev_3c501);
893 return 0;
897 * cleanup_module:
899 * The module is being unloaded. We unhook our network device from the system
900 * and then free up the resources we took when the card was found.
903 void __exit cleanup_module(void)
905 struct net_device *dev = dev_3c501;
906 unregister_netdev(dev);
907 release_region(dev->base_addr, EL1_IO_EXTENT);
908 free_netdev(dev);
911 #endif /* MODULE */
913 MODULE_AUTHOR("Donald Becker, Alan Cox");
914 MODULE_DESCRIPTION("Support for the ancient 3Com 3c501 ethernet card");
915 MODULE_LICENSE("GPL");