1 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
3 Written 1992-94 by Donald Becker.
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
11 The author may be reached as becker@scyld.com, or C/O
12 Scyld Computing Corporation, 410 Severn Ave., Suite 210, Annapolis MD 21403
14 This driver should work with many programmed-I/O 8390-based ethernet
15 boards. Currently it supports the NE1000, NE2000, many clones,
16 and some Cabletron products.
20 Paul Gortmaker : use ENISR_RDC to monitor Tx PIO uploads, made
21 sanity checks and bad clone support optional.
22 Paul Gortmaker : new reset code, reset card after probe at boot.
23 Paul Gortmaker : multiple card support for module users.
24 Paul Gortmaker : Support for PCI ne2k clones, similar to lance.c
25 Paul Gortmaker : Allow users with bad cards to avoid full probe.
26 Paul Gortmaker : PCI probe changes, more PCI cards supported.
27 rjohnson@analogic.com : Changed init order so an interrupt will only
28 occur after memory is allocated for dev->priv. Deallocated memory
29 last in cleanup_modue()
30 Richard Guenther : Added support for ISAPnP cards
31 Paul Gortmaker : Discontinued PCI support - use ne2k-pci.c instead.
35 /* Routines for the NatSemi-based designs (NE[12]000). */
37 static const char version1[] =
38 "ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)\n";
39 static const char version2[] =
40 "Last modified Nov 1, 2000 by Paul Gortmaker\n";
43 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/errno.h>
46 #include <linux/isapnp.h>
47 #include <linux/init.h>
48 #include <linux/interrupt.h>
49 #include <linux/delay.h>
50 #include <linux/netdevice.h>
51 #include <linux/etherdevice.h>
53 #include <asm/system.h>
60 /* Some defines that people can play with if so inclined. */
62 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
63 #define SUPPORT_NE_BAD_CLONES
65 /* Do we perform extra sanity checks on stuff ? */
66 /* #define NE_SANITY_CHECK */
68 /* Do we implement the read before write bugfix ? */
69 /* #define NE_RW_BUGFIX */
71 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
72 /* #define PACKETBUF_MEMSIZE 0x40 */
74 /* A zero-terminated list of I/O addresses to be probed at boot. */
76 static unsigned int netcard_portlist[] __initdata = {
77 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
81 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
82 { ISAPNP_CARD_ID('A','X','E',0x2011),
83 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
84 (long) "NetGear EA201" },
85 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
86 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
88 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
89 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
90 (long) "Generic PNP" },
91 { } /* terminate list */
94 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
96 #ifdef SUPPORT_NE_BAD_CLONES
97 /* A list of bad clones that we none-the-less recognize. */
98 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
99 bad_clone_list[] __initdata = {
100 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
101 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
102 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
103 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
104 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
105 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
106 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
107 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
108 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
109 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
110 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
111 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
112 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
113 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
118 /* ---- No user-serviceable parts below ---- */
120 #define NE_BASE (dev->base_addr)
122 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
123 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
124 #define NE_IO_EXTENT 0x20
126 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
127 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
128 #define NESM_START_PG 0x40 /* First page of TX buffer */
129 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
131 static int ne_probe1(struct net_device *dev, int ioaddr);
132 static int ne_probe_isapnp(struct net_device *dev);
134 static int ne_open(struct net_device *dev);
135 static int ne_close(struct net_device *dev);
137 static void ne_reset_8390(struct net_device *dev);
138 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
140 static void ne_block_input(struct net_device *dev, int count,
141 struct sk_buff *skb, int ring_offset);
142 static void ne_block_output(struct net_device *dev, const int count,
143 const unsigned char *buf, const int start_page);
146 /* Probe for various non-shared-memory ethercards.
148 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
149 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
150 the SAPROM, while other supposed NE2000 clones must be detected by their
153 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
154 mode results in doubled values, which can be detected and compensated for.
156 The probe is also responsible for initializing the card and filling
157 in the 'dev' and 'ei_status' structures.
159 We use the minimum memory size for some ethercard product lines, iff we can't
160 distinguish models. You can increase the packet buffer size by setting
161 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
162 E1010 starts at 0x100 and ends at 0x2000.
163 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
164 E2010 starts at 0x100 and ends at 0x4000.
165 E2010-x starts at 0x100 and ends at 0xffff. */
167 static int __init do_ne_probe(struct net_device *dev)
169 unsigned int base_addr = dev->base_addr;
171 int orig_irq = dev->irq;
174 SET_MODULE_OWNER(dev);
176 /* First check any supplied i/o locations. User knows best. <cough> */
177 if (base_addr > 0x1ff) /* Check a single specified location. */
178 return ne_probe1(dev, base_addr);
179 else if (base_addr != 0) /* Don't probe at all. */
182 /* Then look for any installed ISAPnP clones */
183 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
187 /* Last resort. The semi-risky ISA auto-probe. */
188 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
189 int ioaddr = netcard_portlist[base_addr];
191 if (ne_probe1(dev, ioaddr) == 0)
199 static void cleanup_card(struct net_device *dev)
201 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
203 pnp_device_detach(idev);
204 free_irq(dev->irq, dev);
205 release_region(dev->base_addr, NE_IO_EXTENT);
209 struct net_device * __init ne_probe(int unit)
211 struct net_device *dev = alloc_ei_netdev();
215 return ERR_PTR(-ENOMEM);
217 sprintf(dev->name, "eth%d", unit);
218 netdev_boot_setup_check(dev);
220 err = do_ne_probe(dev);
223 err = register_netdev(dev);
235 static int __init ne_probe_isapnp(struct net_device *dev)
239 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
240 struct pnp_dev *idev = NULL;
242 while ((idev = pnp_find_dev(NULL,
243 isapnp_clone_list[i].vendor,
244 isapnp_clone_list[i].function,
246 /* Avoid already found cards from previous calls */
247 if (pnp_device_attach(idev) < 0)
249 if (pnp_activate_dev(idev) < 0) {
250 pnp_device_detach(idev);
253 /* if no io and irq, search for next */
254 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
255 pnp_device_detach(idev);
259 dev->base_addr = pnp_port_start(idev, 0);
260 dev->irq = pnp_irq(idev, 0);
261 printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
262 (char *) isapnp_clone_list[i].driver_data,
263 dev->base_addr, dev->irq);
264 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
265 printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
266 pnp_device_detach(idev);
269 ei_status.priv = (unsigned long)idev;
280 static int __init ne_probe1(struct net_device *dev, int ioaddr)
283 unsigned char SA_prom[32];
285 const char *name = NULL;
286 int start_page, stop_page;
287 int neX000, ctron, copam, bad_card;
289 static unsigned version_printed;
291 if (!request_region(ioaddr, NE_IO_EXTENT, DRV_NAME))
294 reg0 = inb_p(ioaddr);
300 /* Do a preliminary verification that we have a 8390. */
303 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
304 regd = inb_p(ioaddr + 0x0d);
305 outb_p(0xff, ioaddr + 0x0d);
306 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
307 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
308 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
309 outb_p(reg0, ioaddr);
310 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
316 if (ei_debug && version_printed++ == 0)
317 printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
319 printk(KERN_INFO "NE*000 ethercard probe at %#3x:", ioaddr);
321 /* A user with a poor card that fails to ack the reset, or that
322 does not have a valid 0x57,0x57 signature can still use this
323 without having to recompile. Specifying an i/o address along
324 with an otherwise unused dev->mem_end value of "0xBAD" will
325 cause the driver to skip these parts of the probe. */
327 bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
329 /* Reset card. Who knows what dain-bramaged state it was left in. */
332 unsigned long reset_start_time = jiffies;
334 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
335 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
337 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
338 if (jiffies - reset_start_time > 2*HZ/100) {
340 printk(" (warning: no reset ack)");
343 printk(" not found (no reset ack).\n");
349 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
352 /* Read the 16 bytes of station address PROM.
353 We must first initialize registers, similar to NS8390_init(eifdev, 0).
354 We can't reliably read the SAPROM address without this.
355 (I learned the hard way!). */
357 struct {unsigned char value, offset; } program_seq[] =
359 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
360 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
361 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
363 {0x00, EN0_IMR}, /* Mask completion irq. */
365 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
366 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
369 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
371 {E8390_RREAD+E8390_START, E8390_CMD},
374 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
375 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
378 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
379 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
380 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
381 if (SA_prom[i] != SA_prom[i+1])
387 for (i = 0; i < 16; i++)
388 SA_prom[i] = SA_prom[i+i];
389 /* We must set the 8390 for word mode. */
390 outb_p(0x49, ioaddr + EN0_DCFG);
391 start_page = NESM_START_PG;
392 stop_page = NESM_STOP_PG;
394 start_page = NE1SM_START_PG;
395 stop_page = NE1SM_STOP_PG;
398 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
399 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
400 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
402 /* Set up the rest of the parameters. */
403 if (neX000 || bad_card || copam) {
404 name = (wordlength == 2) ? "NE2000" : "NE1000";
408 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
410 stop_page = (wordlength == 2) ? 0x40 : 0x20;
414 #ifdef SUPPORT_NE_BAD_CLONES
415 /* Ack! Well, there might be a *bad* NE*000 clone there.
416 Check for total bogus addresses. */
417 for (i = 0; bad_clone_list[i].name8; i++)
419 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
420 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
421 SA_prom[2] == bad_clone_list[i].SAprefix[2])
425 name = bad_clone_list[i].name16;
427 name = bad_clone_list[i].name8;
432 if (bad_clone_list[i].name8 == NULL)
434 printk(" not found (invalid signature %2.2x %2.2x).\n",
435 SA_prom[14], SA_prom[15]);
440 printk(" not found.\n");
448 unsigned long cookie = probe_irq_on();
449 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
450 outb_p(0x00, ioaddr + EN0_RCNTLO);
451 outb_p(0x00, ioaddr + EN0_RCNTHI);
452 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
453 mdelay(10); /* wait 10ms for interrupt to propagate */
454 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
455 dev->irq = probe_irq_off(cookie);
457 printk(" autoirq is %d\n", dev->irq);
458 } else if (dev->irq == 2)
459 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
460 or don't know which one to set. */
464 printk(" failed to detect IRQ line.\n");
469 /* Snarf the interrupt now. There's no point in waiting since we cannot
470 share and the board will usually be enabled. */
471 ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
473 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
477 dev->base_addr = ioaddr;
479 for(i = 0; i < ETHER_ADDR_LEN; i++) {
480 printk(" %2.2x", SA_prom[i]);
481 dev->dev_addr[i] = SA_prom[i];
484 printk("\n%s: %s found at %#x, using IRQ %d.\n",
485 dev->name, name, ioaddr, dev->irq);
487 ei_status.name = name;
488 ei_status.tx_start_page = start_page;
489 ei_status.stop_page = stop_page;
490 ei_status.word16 = (wordlength == 2);
492 ei_status.rx_start_page = start_page + TX_PAGES;
493 #ifdef PACKETBUF_MEMSIZE
494 /* Allow the packet buffer size to be overridden by know-it-alls. */
495 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
498 ei_status.reset_8390 = &ne_reset_8390;
499 ei_status.block_input = &ne_block_input;
500 ei_status.block_output = &ne_block_output;
501 ei_status.get_8390_hdr = &ne_get_8390_hdr;
503 dev->open = &ne_open;
504 dev->stop = &ne_close;
505 #ifdef CONFIG_NET_POLL_CONTROLLER
506 dev->poll_controller = ei_poll;
512 release_region(ioaddr, NE_IO_EXTENT);
516 static int ne_open(struct net_device *dev)
522 static int ne_close(struct net_device *dev)
525 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
530 /* Hard reset the card. This used to pause for the same period that a
531 8390 reset command required, but that shouldn't be necessary. */
533 static void ne_reset_8390(struct net_device *dev)
535 unsigned long reset_start_time = jiffies;
538 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
540 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
541 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
544 ei_status.dmaing = 0;
546 /* This check _should_not_ be necessary, omit eventually. */
547 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
548 if (jiffies - reset_start_time > 2*HZ/100) {
549 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
552 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
555 /* Grab the 8390 specific header. Similar to the block_input routine, but
556 we don't need to be concerned with ring wrap as the header will be at
557 the start of a page, so we optimize accordingly. */
559 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
561 int nic_base = dev->base_addr;
563 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
565 if (ei_status.dmaing)
567 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
568 "[DMAstat:%d][irqlock:%d].\n",
569 dev->name, ei_status.dmaing, ei_status.irqlock);
573 ei_status.dmaing |= 0x01;
574 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
575 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
576 outb_p(0, nic_base + EN0_RCNTHI);
577 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
578 outb_p(ring_page, nic_base + EN0_RSARHI);
579 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
581 if (ei_status.word16)
582 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
584 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
586 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
587 ei_status.dmaing &= ~0x01;
589 le16_to_cpus(&hdr->count);
592 /* Block input and output, similar to the Crynwr packet driver. If you
593 are porting to a new ethercard, look at the packet driver source for hints.
594 The NEx000 doesn't share the on-board packet memory -- you have to put
595 the packet out through the "remote DMA" dataport using outb. */
597 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
599 #ifdef NE_SANITY_CHECK
600 int xfer_count = count;
602 int nic_base = dev->base_addr;
603 char *buf = skb->data;
605 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
606 if (ei_status.dmaing)
608 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
609 "[DMAstat:%d][irqlock:%d].\n",
610 dev->name, ei_status.dmaing, ei_status.irqlock);
613 ei_status.dmaing |= 0x01;
614 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
615 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
616 outb_p(count >> 8, nic_base + EN0_RCNTHI);
617 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
618 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
619 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
620 if (ei_status.word16)
622 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
625 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
626 #ifdef NE_SANITY_CHECK
631 insb(NE_BASE + NE_DATAPORT, buf, count);
634 #ifdef NE_SANITY_CHECK
635 /* This was for the ALPHA version only, but enough people have
636 been encountering problems so it is still here. If you see
637 this message you either 1) have a slightly incompatible clone
638 or 2) have noise/speed problems with your bus. */
642 /* DMA termination address check... */
643 int addr, tries = 20;
645 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
646 -- it's broken for Rx on some cards! */
647 int high = inb_p(nic_base + EN0_RSARHI);
648 int low = inb_p(nic_base + EN0_RSARLO);
649 addr = (high << 8) + low;
650 if (((ring_offset + xfer_count) & 0xff) == low)
652 } while (--tries > 0);
654 printk(KERN_WARNING "%s: RX transfer address mismatch,"
655 "%#4.4x (expected) vs. %#4.4x (actual).\n",
656 dev->name, ring_offset + xfer_count, addr);
659 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
660 ei_status.dmaing &= ~0x01;
663 static void ne_block_output(struct net_device *dev, int count,
664 const unsigned char *buf, const int start_page)
666 int nic_base = NE_BASE;
667 unsigned long dma_start;
668 #ifdef NE_SANITY_CHECK
672 /* Round the count up for word writes. Do we need to do this?
673 What effect will an odd byte count have on the 8390?
674 I should check someday. */
676 if (ei_status.word16 && (count & 0x01))
679 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
680 if (ei_status.dmaing)
682 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
683 "[DMAstat:%d][irqlock:%d]\n",
684 dev->name, ei_status.dmaing, ei_status.irqlock);
687 ei_status.dmaing |= 0x01;
688 /* We should already be in page 0, but to be safe... */
689 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
691 #ifdef NE_SANITY_CHECK
695 #ifdef NE8390_RW_BUGFIX
696 /* Handle the read-before-write bug the same way as the
697 Crynwr packet driver -- the NatSemi method doesn't work.
698 Actually this doesn't always work either, but if you have
699 problems with your NEx000 this is better than nothing! */
701 outb_p(0x42, nic_base + EN0_RCNTLO);
702 outb_p(0x00, nic_base + EN0_RCNTHI);
703 outb_p(0x42, nic_base + EN0_RSARLO);
704 outb_p(0x00, nic_base + EN0_RSARHI);
705 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
706 /* Make certain that the dummy read has occurred. */
710 outb_p(ENISR_RDC, nic_base + EN0_ISR);
712 /* Now the normal output. */
713 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
714 outb_p(count >> 8, nic_base + EN0_RCNTHI);
715 outb_p(0x00, nic_base + EN0_RSARLO);
716 outb_p(start_page, nic_base + EN0_RSARHI);
718 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
719 if (ei_status.word16) {
720 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
722 outsb(NE_BASE + NE_DATAPORT, buf, count);
727 #ifdef NE_SANITY_CHECK
728 /* This was for the ALPHA version only, but enough people have
729 been encountering problems so it is still here. */
733 /* DMA termination address check... */
734 int addr, tries = 20;
736 int high = inb_p(nic_base + EN0_RSARHI);
737 int low = inb_p(nic_base + EN0_RSARLO);
738 addr = (high << 8) + low;
739 if ((start_page << 8) + count == addr)
741 } while (--tries > 0);
745 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
746 "%#4.4x (expected) vs. %#4.4x (actual).\n",
747 dev->name, (start_page << 8) + count, addr);
754 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
755 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
756 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
762 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
763 ei_status.dmaing &= ~0x01;
769 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
770 static struct net_device *dev_ne[MAX_NE_CARDS];
771 static int io[MAX_NE_CARDS];
772 static int irq[MAX_NE_CARDS];
773 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
775 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
776 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
777 MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
778 MODULE_PARM_DESC(io, "I/O base address(es),required");
779 MODULE_PARM_DESC(irq, "IRQ number(s)");
780 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
781 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
782 MODULE_LICENSE("GPL");
784 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
785 that the ne2k probe is the last 8390 based probe to take place (as it
786 is at boot) and so the probe will get confused by any other 8390 cards.
787 ISA device autoprobes on a running machine are not recommended anyway. */
789 int init_module(void)
791 int this_dev, found = 0;
793 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
794 struct net_device *dev = alloc_ei_netdev();
797 dev->irq = irq[this_dev];
798 dev->mem_end = bad[this_dev];
799 dev->base_addr = io[this_dev];
800 if (do_ne_probe(dev) == 0) {
801 if (register_netdev(dev) == 0) {
802 dev_ne[found++] = dev;
810 if (io[this_dev] != 0)
811 printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
813 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
821 void cleanup_module(void)
825 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
826 struct net_device *dev = dev_ne[this_dev];
828 unregister_netdev(dev);