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>
58 /* Some defines that people can play with if so inclined. */
60 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
61 #define SUPPORT_NE_BAD_CLONES
63 /* Do we perform extra sanity checks on stuff ? */
64 /* #define NE_SANITY_CHECK */
66 /* Do we implement the read before write bugfix ? */
67 /* #define NE_RW_BUGFIX */
69 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
70 /* #define PACKETBUF_MEMSIZE 0x40 */
72 /* A zero-terminated list of I/O addresses to be probed at boot. */
74 static unsigned int netcard_portlist[] __initdata = {
75 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
79 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
80 { ISAPNP_CARD_ID('A','X','E',0x2011),
81 ISAPNP_VENDOR('A','X','E'), ISAPNP_FUNCTION(0x2011),
82 (long) "NetGear EA201" },
83 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
84 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
86 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
87 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
88 (long) "Generic PNP" },
89 { } /* terminate list */
92 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
94 #ifdef SUPPORT_NE_BAD_CLONES
95 /* A list of bad clones that we none-the-less recognize. */
96 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
97 bad_clone_list[] __initdata = {
98 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
99 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
100 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
101 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
102 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
103 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
104 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
105 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
106 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
107 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
108 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
109 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
110 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
111 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
116 /* ---- No user-serviceable parts below ---- */
118 #define NE_BASE (dev->base_addr)
120 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
121 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
122 #define NE_IO_EXTENT 0x20
124 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
125 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
126 #define NESM_START_PG 0x40 /* First page of TX buffer */
127 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
129 static int ne_probe1(struct net_device *dev, int ioaddr);
130 static int ne_probe_isapnp(struct net_device *dev);
132 static int ne_open(struct net_device *dev);
133 static int ne_close(struct net_device *dev);
135 static void ne_reset_8390(struct net_device *dev);
136 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
138 static void ne_block_input(struct net_device *dev, int count,
139 struct sk_buff *skb, int ring_offset);
140 static void ne_block_output(struct net_device *dev, const int count,
141 const unsigned char *buf, const int start_page);
144 /* Probe for various non-shared-memory ethercards.
146 NEx000-clone boards have a Station Address PROM (SAPROM) in the packet
147 buffer memory space. NE2000 clones have 0x57,0x57 in bytes 0x0e,0x0f of
148 the SAPROM, while other supposed NE2000 clones must be detected by their
151 Reading the SAPROM from a word-wide card with the 8390 set in byte-wide
152 mode results in doubled values, which can be detected and compensated for.
154 The probe is also responsible for initializing the card and filling
155 in the 'dev' and 'ei_status' structures.
157 We use the minimum memory size for some ethercard product lines, iff we can't
158 distinguish models. You can increase the packet buffer size by setting
159 PACKETBUF_MEMSIZE. Reported Cabletron packet buffer locations are:
160 E1010 starts at 0x100 and ends at 0x2000.
161 E1010-x starts at 0x100 and ends at 0x8000. ("-x" means "more memory")
162 E2010 starts at 0x100 and ends at 0x4000.
163 E2010-x starts at 0x100 and ends at 0xffff. */
165 static int __init do_ne_probe(struct net_device *dev)
167 unsigned int base_addr = dev->base_addr;
169 int orig_irq = dev->irq;
172 SET_MODULE_OWNER(dev);
174 /* First check any supplied i/o locations. User knows best. <cough> */
175 if (base_addr > 0x1ff) /* Check a single specified location. */
176 return ne_probe1(dev, base_addr);
177 else if (base_addr != 0) /* Don't probe at all. */
180 /* Then look for any installed ISAPnP clones */
181 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
185 /* Last resort. The semi-risky ISA auto-probe. */
186 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
187 int ioaddr = netcard_portlist[base_addr];
189 if (ne_probe1(dev, ioaddr) == 0)
197 static void cleanup_card(struct net_device *dev)
199 struct pnp_dev *idev = (struct pnp_dev *)ei_status.priv;
201 pnp_device_detach(idev);
202 free_irq(dev->irq, dev);
203 release_region(dev->base_addr, NE_IO_EXTENT);
206 struct net_device * __init ne_probe(int unit)
208 struct net_device *dev = alloc_ei_netdev();
212 return ERR_PTR(-ENOMEM);
214 sprintf(dev->name, "eth%d", unit);
215 netdev_boot_setup_check(dev);
217 err = do_ne_probe(dev);
220 err = register_netdev(dev);
231 static int __init ne_probe_isapnp(struct net_device *dev)
235 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
236 struct pnp_dev *idev = NULL;
238 while ((idev = pnp_find_dev(NULL,
239 isapnp_clone_list[i].vendor,
240 isapnp_clone_list[i].function,
242 /* Avoid already found cards from previous calls */
243 if (pnp_device_attach(idev) < 0)
245 if (pnp_activate_dev(idev) < 0) {
246 pnp_device_detach(idev);
249 /* if no io and irq, search for next */
250 if (!pnp_port_valid(idev, 0) || !pnp_irq_valid(idev, 0)) {
251 pnp_device_detach(idev);
255 dev->base_addr = pnp_port_start(idev, 0);
256 dev->irq = pnp_irq(idev, 0);
257 printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
258 (char *) isapnp_clone_list[i].driver_data,
259 dev->base_addr, dev->irq);
260 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
261 printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
262 pnp_device_detach(idev);
265 ei_status.priv = (unsigned long)idev;
276 static int __init ne_probe1(struct net_device *dev, int ioaddr)
279 unsigned char SA_prom[32];
281 const char *name = NULL;
282 int start_page, stop_page;
283 int neX000, ctron, copam, bad_card;
285 static unsigned version_printed;
287 if (!request_region(ioaddr, NE_IO_EXTENT, dev->name))
290 reg0 = inb_p(ioaddr);
296 /* Do a preliminary verification that we have a 8390. */
299 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
300 regd = inb_p(ioaddr + 0x0d);
301 outb_p(0xff, ioaddr + 0x0d);
302 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
303 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
304 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
305 outb_p(reg0, ioaddr);
306 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
312 if (ei_debug && version_printed++ == 0)
313 printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
315 printk(KERN_INFO "NE*000 ethercard probe at %#3x:", ioaddr);
317 /* A user with a poor card that fails to ack the reset, or that
318 does not have a valid 0x57,0x57 signature can still use this
319 without having to recompile. Specifying an i/o address along
320 with an otherwise unused dev->mem_end value of "0xBAD" will
321 cause the driver to skip these parts of the probe. */
323 bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
325 /* Reset card. Who knows what dain-bramaged state it was left in. */
328 unsigned long reset_start_time = jiffies;
330 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
331 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
333 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
334 if (jiffies - reset_start_time > 2*HZ/100) {
336 printk(" (warning: no reset ack)");
339 printk(" not found (no reset ack).\n");
345 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
348 /* Read the 16 bytes of station address PROM.
349 We must first initialize registers, similar to NS8390_init(eifdev, 0).
350 We can't reliably read the SAPROM address without this.
351 (I learned the hard way!). */
353 struct {unsigned char value, offset; } program_seq[] =
355 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
356 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
357 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
359 {0x00, EN0_IMR}, /* Mask completion irq. */
361 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
362 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
365 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
367 {E8390_RREAD+E8390_START, E8390_CMD},
370 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
371 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
374 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
375 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
376 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
377 if (SA_prom[i] != SA_prom[i+1])
383 for (i = 0; i < 16; i++)
384 SA_prom[i] = SA_prom[i+i];
385 /* We must set the 8390 for word mode. */
386 outb_p(0x49, ioaddr + EN0_DCFG);
387 start_page = NESM_START_PG;
388 stop_page = NESM_STOP_PG;
390 start_page = NE1SM_START_PG;
391 stop_page = NE1SM_STOP_PG;
394 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
395 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
396 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
398 /* Set up the rest of the parameters. */
399 if (neX000 || bad_card || copam) {
400 name = (wordlength == 2) ? "NE2000" : "NE1000";
404 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
406 stop_page = (wordlength == 2) ? 0x40 : 0x20;
410 #ifdef SUPPORT_NE_BAD_CLONES
411 /* Ack! Well, there might be a *bad* NE*000 clone there.
412 Check for total bogus addresses. */
413 for (i = 0; bad_clone_list[i].name8; i++)
415 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
416 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
417 SA_prom[2] == bad_clone_list[i].SAprefix[2])
421 name = bad_clone_list[i].name16;
423 name = bad_clone_list[i].name8;
428 if (bad_clone_list[i].name8 == NULL)
430 printk(" not found (invalid signature %2.2x %2.2x).\n",
431 SA_prom[14], SA_prom[15]);
436 printk(" not found.\n");
444 unsigned long cookie = probe_irq_on();
445 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
446 outb_p(0x00, ioaddr + EN0_RCNTLO);
447 outb_p(0x00, ioaddr + EN0_RCNTHI);
448 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
449 mdelay(10); /* wait 10ms for interrupt to propagate */
450 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
451 dev->irq = probe_irq_off(cookie);
453 printk(" autoirq is %d\n", dev->irq);
454 } else if (dev->irq == 2)
455 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
456 or don't know which one to set. */
460 printk(" failed to detect IRQ line.\n");
465 /* Snarf the interrupt now. There's no point in waiting since we cannot
466 share and the board will usually be enabled. */
467 ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
469 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
473 dev->base_addr = ioaddr;
475 for(i = 0; i < ETHER_ADDR_LEN; i++) {
476 printk(" %2.2x", SA_prom[i]);
477 dev->dev_addr[i] = SA_prom[i];
480 printk("\n%s: %s found at %#x, using IRQ %d.\n",
481 dev->name, name, ioaddr, dev->irq);
483 ei_status.name = name;
484 ei_status.tx_start_page = start_page;
485 ei_status.stop_page = stop_page;
486 ei_status.word16 = (wordlength == 2);
488 ei_status.rx_start_page = start_page + TX_PAGES;
489 #ifdef PACKETBUF_MEMSIZE
490 /* Allow the packet buffer size to be overridden by know-it-alls. */
491 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
494 ei_status.reset_8390 = &ne_reset_8390;
495 ei_status.block_input = &ne_block_input;
496 ei_status.block_output = &ne_block_output;
497 ei_status.get_8390_hdr = &ne_get_8390_hdr;
499 dev->open = &ne_open;
500 dev->stop = &ne_close;
501 #ifdef CONFIG_NET_POLL_CONTROLLER
502 dev->poll_controller = ei_poll;
508 release_region(ioaddr, NE_IO_EXTENT);
512 static int ne_open(struct net_device *dev)
518 static int ne_close(struct net_device *dev)
521 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
526 /* Hard reset the card. This used to pause for the same period that a
527 8390 reset command required, but that shouldn't be necessary. */
529 static void ne_reset_8390(struct net_device *dev)
531 unsigned long reset_start_time = jiffies;
534 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
536 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
537 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
540 ei_status.dmaing = 0;
542 /* This check _should_not_ be necessary, omit eventually. */
543 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
544 if (jiffies - reset_start_time > 2*HZ/100) {
545 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
548 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
551 /* Grab the 8390 specific header. Similar to the block_input routine, but
552 we don't need to be concerned with ring wrap as the header will be at
553 the start of a page, so we optimize accordingly. */
555 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
557 int nic_base = dev->base_addr;
559 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
561 if (ei_status.dmaing)
563 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
564 "[DMAstat:%d][irqlock:%d].\n",
565 dev->name, ei_status.dmaing, ei_status.irqlock);
569 ei_status.dmaing |= 0x01;
570 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
571 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
572 outb_p(0, nic_base + EN0_RCNTHI);
573 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
574 outb_p(ring_page, nic_base + EN0_RSARHI);
575 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
577 if (ei_status.word16)
578 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
580 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
582 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
583 ei_status.dmaing &= ~0x01;
585 le16_to_cpus(&hdr->count);
588 /* Block input and output, similar to the Crynwr packet driver. If you
589 are porting to a new ethercard, look at the packet driver source for hints.
590 The NEx000 doesn't share the on-board packet memory -- you have to put
591 the packet out through the "remote DMA" dataport using outb. */
593 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
595 #ifdef NE_SANITY_CHECK
596 int xfer_count = count;
598 int nic_base = dev->base_addr;
599 char *buf = skb->data;
601 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
602 if (ei_status.dmaing)
604 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
605 "[DMAstat:%d][irqlock:%d].\n",
606 dev->name, ei_status.dmaing, ei_status.irqlock);
609 ei_status.dmaing |= 0x01;
610 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
611 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
612 outb_p(count >> 8, nic_base + EN0_RCNTHI);
613 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
614 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
615 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
616 if (ei_status.word16)
618 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
621 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
622 #ifdef NE_SANITY_CHECK
627 insb(NE_BASE + NE_DATAPORT, buf, count);
630 #ifdef NE_SANITY_CHECK
631 /* This was for the ALPHA version only, but enough people have
632 been encountering problems so it is still here. If you see
633 this message you either 1) have a slightly incompatible clone
634 or 2) have noise/speed problems with your bus. */
638 /* DMA termination address check... */
639 int addr, tries = 20;
641 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
642 -- it's broken for Rx on some cards! */
643 int high = inb_p(nic_base + EN0_RSARHI);
644 int low = inb_p(nic_base + EN0_RSARLO);
645 addr = (high << 8) + low;
646 if (((ring_offset + xfer_count) & 0xff) == low)
648 } while (--tries > 0);
650 printk(KERN_WARNING "%s: RX transfer address mismatch,"
651 "%#4.4x (expected) vs. %#4.4x (actual).\n",
652 dev->name, ring_offset + xfer_count, addr);
655 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
656 ei_status.dmaing &= ~0x01;
659 static void ne_block_output(struct net_device *dev, int count,
660 const unsigned char *buf, const int start_page)
662 int nic_base = NE_BASE;
663 unsigned long dma_start;
664 #ifdef NE_SANITY_CHECK
668 /* Round the count up for word writes. Do we need to do this?
669 What effect will an odd byte count have on the 8390?
670 I should check someday. */
672 if (ei_status.word16 && (count & 0x01))
675 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
676 if (ei_status.dmaing)
678 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
679 "[DMAstat:%d][irqlock:%d]\n",
680 dev->name, ei_status.dmaing, ei_status.irqlock);
683 ei_status.dmaing |= 0x01;
684 /* We should already be in page 0, but to be safe... */
685 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
687 #ifdef NE_SANITY_CHECK
691 #ifdef NE8390_RW_BUGFIX
692 /* Handle the read-before-write bug the same way as the
693 Crynwr packet driver -- the NatSemi method doesn't work.
694 Actually this doesn't always work either, but if you have
695 problems with your NEx000 this is better than nothing! */
697 outb_p(0x42, nic_base + EN0_RCNTLO);
698 outb_p(0x00, nic_base + EN0_RCNTHI);
699 outb_p(0x42, nic_base + EN0_RSARLO);
700 outb_p(0x00, nic_base + EN0_RSARHI);
701 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
702 /* Make certain that the dummy read has occurred. */
706 outb_p(ENISR_RDC, nic_base + EN0_ISR);
708 /* Now the normal output. */
709 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
710 outb_p(count >> 8, nic_base + EN0_RCNTHI);
711 outb_p(0x00, nic_base + EN0_RSARLO);
712 outb_p(start_page, nic_base + EN0_RSARHI);
714 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
715 if (ei_status.word16) {
716 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
718 outsb(NE_BASE + NE_DATAPORT, buf, count);
723 #ifdef NE_SANITY_CHECK
724 /* This was for the ALPHA version only, but enough people have
725 been encountering problems so it is still here. */
729 /* DMA termination address check... */
730 int addr, tries = 20;
732 int high = inb_p(nic_base + EN0_RSARHI);
733 int low = inb_p(nic_base + EN0_RSARLO);
734 addr = (high << 8) + low;
735 if ((start_page << 8) + count == addr)
737 } while (--tries > 0);
741 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
742 "%#4.4x (expected) vs. %#4.4x (actual).\n",
743 dev->name, (start_page << 8) + count, addr);
750 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
751 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
752 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
758 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
759 ei_status.dmaing &= ~0x01;
765 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
766 static struct net_device *dev_ne[MAX_NE_CARDS];
767 static int io[MAX_NE_CARDS];
768 static int irq[MAX_NE_CARDS];
769 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
771 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
772 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
773 MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
774 MODULE_PARM_DESC(io, "I/O base address(es),required");
775 MODULE_PARM_DESC(irq, "IRQ number(s)");
776 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
777 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
778 MODULE_LICENSE("GPL");
780 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
781 that the ne2k probe is the last 8390 based probe to take place (as it
782 is at boot) and so the probe will get confused by any other 8390 cards.
783 ISA device autoprobes on a running machine are not recommended anyway. */
785 int init_module(void)
787 int this_dev, found = 0;
789 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
790 struct net_device *dev = alloc_ei_netdev();
793 dev->irq = irq[this_dev];
794 dev->mem_end = bad[this_dev];
795 dev->base_addr = io[this_dev];
796 if (do_ne_probe(dev) == 0) {
797 if (register_netdev(dev) == 0) {
798 dev_ne[found++] = dev;
806 if (io[this_dev] != 0)
807 printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
809 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
817 void cleanup_module(void)
821 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
822 struct net_device *dev = dev_ne[this_dev];
824 unregister_netdev(dev);