1 /* ne.c: A general non-shared-memory NS8390 ethernet driver for linux. */
2 /*
3 Written 1992-94 by Donald Becker.
4
5 Copyright 1993 United States Government as represented by the
6 Director, National Security Agency.
7
8 This software may be used and distributed according to the terms
9 of the GNU General Public License, incorporated herein by reference.
10
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
13
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.
17
18 Changelog:
19
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.
32
33 */
34
35 /* Routines for the NatSemi-based designs (NE[12]000). */
36
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";
41
42
43 #include <linux/module.h>
44 #include <linux/kernel.h>
45 #include <linux/sched.h>
46 #include <linux/errno.h>
47 #include <linux/isapnp.h>
48 #include <linux/init.h>
49 #include <linux/delay.h>
50 #include <asm/system.h>
51 #include <asm/io.h>
52
53 #include <linux/netdevice.h>
54 #include <linux/etherdevice.h>
55 #include "8390.h"
56
57 /* Some defines that people can play with if so inclined. */
58
59 /* Do we support clones that don't adhere to 14,15 of the SAprom ? */
60 #define SUPPORT_NE_BAD_CLONES
61
62 /* Do we perform extra sanity checks on stuff ? */
63 /* #define NE_SANITY_CHECK */
64
65 /* Do we implement the read before write bugfix ? */
66 /* #define NE_RW_BUGFIX */
67
68 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
69 /* #define PACKETBUF_MEMSIZE 0x40 */
70
71 /* A zero-terminated list of I/O addresses to be probed at boot. */
72 #ifndef MODULE
73 static unsigned int netcard_portlist[] __initdata = {
74 0x300, 0x280, 0x320, 0x340, 0x360, 0x380, 0
75 };
76 #endif
77
78 static struct isapnp_device_id isapnp_clone_list[] __initdata = {
79 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
80 ISAPNP_VENDOR('E','D','I'), ISAPNP_FUNCTION(0x0216),
81 (long) "NN NE2000" },
82 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
83 ISAPNP_VENDOR('P','N','P'), ISAPNP_FUNCTION(0x80d6),
84 (long) "Generic PNP" },
85 { } /* terminate list */
86 };
87
88 MODULE_DEVICE_TABLE(isapnp, isapnp_clone_list);
89
90 #ifdef SUPPORT_NE_BAD_CLONES
91 /* A list of bad clones that we none-the-less recognize. */
92 static struct { const char *name8, *name16; unsigned char SAprefix[4];}
93 bad_clone_list[] __initdata = {
94 {"DE100", "DE200", {0x00, 0xDE, 0x01,}},
95 {"DE120", "DE220", {0x00, 0x80, 0xc8,}},
96 {"DFI1000", "DFI2000", {'D', 'F', 'I',}}, /* Original, eh? */
97 {"EtherNext UTP8", "EtherNext UTP16", {0x00, 0x00, 0x79}},
98 {"NE1000","NE2000-invalid", {0x00, 0x00, 0xd8}}, /* Ancient real NE1000. */
99 {"NN1000", "NN2000", {0x08, 0x03, 0x08}}, /* Outlaw no-name clone. */
100 {"4-DIM8","4-DIM16", {0x00,0x00,0x4d,}}, /* Outlaw 4-Dimension cards. */
101 {"Con-Intl_8", "Con-Intl_16", {0x00, 0x00, 0x24}}, /* Connect Int'nl */
102 {"ET-100","ET-200", {0x00, 0x45, 0x54}}, /* YANG and YA clone */
103 {"COMPEX","COMPEX16",{0x00,0x80,0x48}}, /* Broken ISA Compex cards */
104 {"E-LAN100", "E-LAN200", {0x00, 0x00, 0x5d}}, /* Broken ne1000 clones */
105 {"PCM-4823", "PCM-4823", {0x00, 0xc0, 0x6c}}, /* Broken Advantech MoBo */
106 {"REALTEK", "RTL8019", {0x00, 0x00, 0xe8}}, /* no-name with Realtek chip */
107 {"LCS-8834", "LCS-8836", {0x04, 0x04, 0x37}}, /* ShinyNet (SET) */
108 #ifdef CONFIG_TOSHIBA_RBTX4927
109 {"TX4927", "TX4927", {0x00, 0x60, 0x0a}}, /* Toshiba w/EEPROM, no probing */
110 #endif
111 {0,}
112 };
113 #endif
114
115 /* ---- No user-serviceable parts below ---- */
116
117 #define NE_BASE (dev->base_addr)
118 #define NE_CMD 0x00
119 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
120 #define NE_RESET 0x1f /* Issue a read to reset, a write to clear. */
121 #define NE_IO_EXTENT 0x20
122
123 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
124 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
125 #define NESM_START_PG 0x40 /* First page of TX buffer */
126 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
127
128 int ne_probe(struct net_device *dev);
129 static int ne_probe1(struct net_device *dev, int ioaddr);
130 static int ne_probe_isapnp(struct net_device *dev);
131
132 static int ne_open(struct net_device *dev);
133 static int ne_close(struct net_device *dev);
134
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,
137 int ring_page);
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);
142
143
144 /* Probe for various non-shared-memory ethercards.
145
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
149 SA prefix.
150
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.
153
154 The probe is also responsible for initializing the card and filling
155 in the 'dev' and 'ei_status' structures.
156
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. */
164
ne_probe(struct net_device * dev)165 int __init ne_probe(struct net_device *dev)
166 {
167 unsigned int base_addr = dev->base_addr;
168
169 SET_MODULE_OWNER(dev);
170
171 /* First check any supplied i/o locations. User knows best. <cough> */
172 if (base_addr > 0x1ff) /* Check a single specified location. */
173 return ne_probe1(dev, base_addr);
174 else if (base_addr != 0) /* Don't probe at all. */
175 return -ENXIO;
176
177 /* Then look for any installed ISAPnP clones */
178 if (isapnp_present() && (ne_probe_isapnp(dev) == 0))
179 return 0;
180
181 #ifndef MODULE
182 /* Last resort. The semi-risky ISA auto-probe. */
183 for (base_addr = 0; netcard_portlist[base_addr] != 0; base_addr++) {
184 int ioaddr = netcard_portlist[base_addr];
185 if (ne_probe1(dev, ioaddr) == 0)
186 return 0;
187 }
188 #endif
189
190 return -ENODEV;
191 }
192
ne_probe_isapnp(struct net_device * dev)193 static int __init ne_probe_isapnp(struct net_device *dev)
194 {
195 int i;
196
197 for (i = 0; isapnp_clone_list[i].vendor != 0; i++) {
198 struct pci_dev *idev = NULL;
199
200 while ((idev = isapnp_find_dev(NULL,
201 isapnp_clone_list[i].vendor,
202 isapnp_clone_list[i].function,
203 idev))) {
204 /* Avoid already found cards from previous calls */
205 if (idev->prepare(idev))
206 continue;
207 if (idev->activate(idev))
208 continue;
209 /* if no irq, search for next */
210 if (idev->irq_resource[0].start == 0)
211 continue;
212 /* found it */
213 dev->base_addr = idev->resource[0].start;
214 dev->irq = idev->irq_resource[0].start;
215 printk(KERN_INFO "ne.c: ISAPnP reports %s at i/o %#lx, irq %d.\n",
216 (char *) isapnp_clone_list[i].driver_data,
217
218 dev->base_addr, dev->irq);
219 if (ne_probe1(dev, dev->base_addr) != 0) { /* Shouldn't happen. */
220 printk(KERN_ERR "ne.c: Probe of ISAPnP card at %#lx failed.\n", dev->base_addr);
221 return -ENXIO;
222 }
223 ei_status.priv = (unsigned long)idev;
224 break;
225 }
226 if (!idev)
227 continue;
228 return 0;
229 }
230
231 return -ENODEV;
232 }
233
ne_probe1(struct net_device * dev,int ioaddr)234 static int __init ne_probe1(struct net_device *dev, int ioaddr)
235 {
236 int i;
237 unsigned char SA_prom[32];
238 int wordlength = 2;
239 const char *name = NULL;
240 int start_page, stop_page;
241 int neX000, ctron, copam, bad_card;
242 int reg0, ret;
243 static unsigned version_printed;
244
245 #ifdef CONFIG_TOSHIBA_RBTX4927
246 #include <asm/tx4927/toshiba_rbtx4927.h>
247 ioaddr = RBTX4927_RTL_8019_BASE;
248 dev->irq = RBTX4927_RTL_8019_IRQ;
249 wordlength = 1;
250 #endif
251
252 if (!request_region(ioaddr, NE_IO_EXTENT, dev->name))
253 return -EBUSY;
254
255 reg0 = inb_p(ioaddr);
256 if (reg0 == 0xFF) {
257 ret = -ENODEV;
258 goto err_out;
259 }
260
261 /* Do a preliminary verification that we have a 8390. */
262 {
263 int regd;
264 outb_p(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
265 regd = inb_p(ioaddr + 0x0d);
266 outb_p(0xff, ioaddr + 0x0d);
267 outb_p(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
268 inb_p(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
269 if (inb_p(ioaddr + EN0_COUNTER0) != 0) {
270 outb_p(reg0, ioaddr);
271 outb_p(regd, ioaddr + 0x0d); /* Restore the old values. */
272 ret = -ENODEV;
273 goto err_out;
274 }
275 }
276
277 if (ei_debug && version_printed++ == 0)
278 printk(KERN_INFO "%s" KERN_INFO "%s", version1, version2);
279
280 printk(KERN_INFO "NE*000 ethercard probe at %#3x:", ioaddr);
281
282 /* A user with a poor card that fails to ack the reset, or that
283 does not have a valid 0x57,0x57 signature can still use this
284 without having to recompile. Specifying an i/o address along
285 with an otherwise unused dev->mem_end value of "0xBAD" will
286 cause the driver to skip these parts of the probe. */
287
288 bad_card = ((dev->base_addr != 0) && (dev->mem_end == 0xbad));
289
290 /* Reset card. Who knows what dain-bramaged state it was left in. */
291
292 {
293 unsigned long reset_start_time = jiffies;
294
295 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
296 outb(inb(ioaddr + NE_RESET), ioaddr + NE_RESET);
297
298 while ((inb_p(ioaddr + EN0_ISR) & ENISR_RESET) == 0)
299 if (jiffies - reset_start_time > 2*HZ/100) {
300 if (bad_card) {
301 printk(" (warning: no reset ack)");
302 break;
303 } else {
304 printk(" not found (no reset ack).\n");
305 ret = -ENODEV;
306 goto err_out;
307 }
308 }
309
310 outb_p(0xff, ioaddr + EN0_ISR); /* Ack all intr. */
311 }
312
313 /* Read the 16 bytes of station address PROM.
314 We must first initialize registers, similar to NS8390_init(eifdev, 0).
315 We can't reliably read the SAPROM address without this.
316 (I learned the hard way!). */
317 {
318 struct {unsigned char value, offset; } program_seq[] =
319 {
320 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
321 {0x48, EN0_DCFG}, /* Set byte-wide (0x48) access. */
322 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
323 {0x00, EN0_RCNTHI},
324 {0x00, EN0_IMR}, /* Mask completion irq. */
325 {0xFF, EN0_ISR},
326 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
327 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
328 {32, EN0_RCNTLO},
329 {0x00, EN0_RCNTHI},
330 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
331 {0x00, EN0_RSARHI},
332 {E8390_RREAD+E8390_START, E8390_CMD},
333 };
334
335 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
336 outb_p(program_seq[i].value, ioaddr + program_seq[i].offset);
337
338 }
339 for(i = 0; i < 32 /*sizeof(SA_prom)*/; i+=2) {
340 SA_prom[i] = inb(ioaddr + NE_DATAPORT);
341 SA_prom[i+1] = inb(ioaddr + NE_DATAPORT);
342 if (SA_prom[i] != SA_prom[i+1])
343 wordlength = 1;
344 }
345
346 if (wordlength == 2)
347 {
348 for (i = 0; i < 16; i++)
349 SA_prom[i] = SA_prom[i+i];
350 /* We must set the 8390 for word mode. */
351 outb_p(0x49, ioaddr + EN0_DCFG);
352 start_page = NESM_START_PG;
353 stop_page = NESM_STOP_PG;
354 } else {
355 #ifdef CONFIG_TOSHIBA_RBTX4927
356 start_page = NESM_START_PG;
357 stop_page = NESM_STOP_PG;
358 for (i = 0; i < 16; i++)
359 SA_prom[i] = SA_prom[i+i];
360 #else
361 start_page = NE1SM_START_PG;
362 stop_page = NE1SM_STOP_PG;
363 #endif
364 }
365
366 neX000 = (SA_prom[14] == 0x57 && SA_prom[15] == 0x57);
367 ctron = (SA_prom[0] == 0x00 && SA_prom[1] == 0x00 && SA_prom[2] == 0x1d);
368 copam = (SA_prom[14] == 0x49 && SA_prom[15] == 0x00);
369
370 /* Set up the rest of the parameters. */
371 if (neX000 || bad_card || copam) {
372 name = (wordlength == 2) ? "NE2000" : "NE1000";
373 }
374 else if (ctron)
375 {
376 name = (wordlength == 2) ? "Ctron-8" : "Ctron-16";
377 start_page = 0x01;
378 stop_page = (wordlength == 2) ? 0x40 : 0x20;
379 }
380 else
381 {
382 #ifdef SUPPORT_NE_BAD_CLONES
383 /* Ack! Well, there might be a *bad* NE*000 clone there.
384 Check for total bogus addresses. */
385 for (i = 0; bad_clone_list[i].name8; i++)
386 {
387 if (SA_prom[0] == bad_clone_list[i].SAprefix[0] &&
388 SA_prom[1] == bad_clone_list[i].SAprefix[1] &&
389 SA_prom[2] == bad_clone_list[i].SAprefix[2])
390 {
391 if (wordlength == 2)
392 {
393 name = bad_clone_list[i].name16;
394 } else {
395 name = bad_clone_list[i].name8;
396 }
397 break;
398 }
399 }
400 if (bad_clone_list[i].name8 == NULL)
401 {
402 printk(" not found (invalid signature %2.2x %2.2x).\n",
403 SA_prom[14], SA_prom[15]);
404 ret = -ENXIO;
405 goto err_out;
406 }
407 #else
408 printk(" not found.\n");
409 ret = -ENXIO;
410 goto err_out;
411 #endif
412 }
413
414 if (dev->irq < 2)
415 {
416 unsigned long cookie = probe_irq_on();
417 outb_p(0x50, ioaddr + EN0_IMR); /* Enable one interrupt. */
418 outb_p(0x00, ioaddr + EN0_RCNTLO);
419 outb_p(0x00, ioaddr + EN0_RCNTHI);
420 outb_p(E8390_RREAD+E8390_START, ioaddr); /* Trigger it... */
421 mdelay(10); /* wait 10ms for interrupt to propagate */
422 outb_p(0x00, ioaddr + EN0_IMR); /* Mask it again. */
423 dev->irq = probe_irq_off(cookie);
424 if (ei_debug > 2)
425 printk(" autoirq is %d\n", dev->irq);
426 } else if (dev->irq == 2)
427 /* Fixup for users that don't know that IRQ 2 is really IRQ 9,
428 or don't know which one to set. */
429 dev->irq = 9;
430
431 if (! dev->irq) {
432 printk(" failed to detect IRQ line.\n");
433 ret = -EAGAIN;
434 goto err_out;
435 }
436
437 /* Allocate dev->priv and fill in 8390 specific dev fields. */
438 if (ethdev_init(dev))
439 {
440 printk (" unable to get memory for dev->priv.\n");
441 ret = -ENOMEM;
442 goto err_out;
443 }
444
445 /* Snarf the interrupt now. There's no point in waiting since we cannot
446 share and the board will usually be enabled. */
447 ret = request_irq(dev->irq, ei_interrupt, 0, name, dev);
448 if (ret) {
449 printk (" unable to get IRQ %d (errno=%d).\n", dev->irq, ret);
450 goto err_out_kfree;
451 }
452
453 dev->base_addr = ioaddr;
454
455 for(i = 0; i < ETHER_ADDR_LEN; i++) {
456 printk(" %2.2x", SA_prom[i]);
457 dev->dev_addr[i] = SA_prom[i];
458 }
459
460 printk("\n%s: %s found at %#x, using IRQ %d.\n",
461 dev->name, name, ioaddr, dev->irq);
462
463 ei_status.name = name;
464 ei_status.tx_start_page = start_page;
465 ei_status.stop_page = stop_page;
466 ei_status.word16 = (wordlength == 2);
467
468 ei_status.rx_start_page = start_page + TX_PAGES;
469 #ifdef PACKETBUF_MEMSIZE
470 /* Allow the packet buffer size to be overridden by know-it-alls. */
471 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
472 #endif
473
474 ei_status.reset_8390 = &ne_reset_8390;
475 ei_status.block_input = &ne_block_input;
476 ei_status.block_output = &ne_block_output;
477 ei_status.get_8390_hdr = &ne_get_8390_hdr;
478 ei_status.priv = 0;
479 dev->open = &ne_open;
480 dev->stop = &ne_close;
481 NS8390_init(dev, 0);
482 return 0;
483
484 err_out_kfree:
485 kfree(dev->priv);
486 dev->priv = NULL;
487 err_out:
488 release_region(ioaddr, NE_IO_EXTENT);
489 return ret;
490 }
491
ne_open(struct net_device * dev)492 static int ne_open(struct net_device *dev)
493 {
494 ei_open(dev);
495 return 0;
496 }
497
ne_close(struct net_device * dev)498 static int ne_close(struct net_device *dev)
499 {
500 if (ei_debug > 1)
501 printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
502 ei_close(dev);
503 return 0;
504 }
505
506 /* Hard reset the card. This used to pause for the same period that a
507 8390 reset command required, but that shouldn't be necessary. */
508
ne_reset_8390(struct net_device * dev)509 static void ne_reset_8390(struct net_device *dev)
510 {
511 unsigned long reset_start_time = jiffies;
512
513 if (ei_debug > 1)
514 printk(KERN_DEBUG "resetting the 8390 t=%ld...", jiffies);
515
516 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
517 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
518
519 ei_status.txing = 0;
520 ei_status.dmaing = 0;
521
522 /* This check _should_not_ be necessary, omit eventually. */
523 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
524 if (jiffies - reset_start_time > 2*HZ/100) {
525 printk(KERN_WARNING "%s: ne_reset_8390() did not complete.\n", dev->name);
526 break;
527 }
528 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
529 }
530
531 /* Grab the 8390 specific header. Similar to the block_input routine, but
532 we don't need to be concerned with ring wrap as the header will be at
533 the start of a page, so we optimize accordingly. */
534
ne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)535 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
536 {
537 int nic_base = dev->base_addr;
538
539 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
540
541 if (ei_status.dmaing)
542 {
543 printk(KERN_EMERG "%s: DMAing conflict in ne_get_8390_hdr "
544 "[DMAstat:%d][irqlock:%d].\n",
545 dev->name, ei_status.dmaing, ei_status.irqlock);
546 return;
547 }
548
549 ei_status.dmaing |= 0x01;
550 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
551 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
552 outb_p(0, nic_base + EN0_RCNTHI);
553 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
554 outb_p(ring_page, nic_base + EN0_RSARHI);
555 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
556
557 if (ei_status.word16)
558 insw(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
559 else
560 insb(NE_BASE + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
561
562 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
563 ei_status.dmaing &= ~0x01;
564
565 le16_to_cpus(&hdr->count);
566 }
567
568 /* Block input and output, similar to the Crynwr packet driver. If you
569 are porting to a new ethercard, look at the packet driver source for hints.
570 The NEx000 doesn't share the on-board packet memory -- you have to put
571 the packet out through the "remote DMA" dataport using outb. */
572
ne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)573 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
574 {
575 #ifdef NE_SANITY_CHECK
576 int xfer_count = count;
577 #endif
578 int nic_base = dev->base_addr;
579 char *buf = skb->data;
580
581 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
582 if (ei_status.dmaing)
583 {
584 printk(KERN_EMERG "%s: DMAing conflict in ne_block_input "
585 "[DMAstat:%d][irqlock:%d].\n",
586 dev->name, ei_status.dmaing, ei_status.irqlock);
587 return;
588 }
589 ei_status.dmaing |= 0x01;
590 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
591 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
592 outb_p(count >> 8, nic_base + EN0_RCNTHI);
593 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
594 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
595 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
596 if (ei_status.word16)
597 {
598 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
599 if (count & 0x01)
600 {
601 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
602 #ifdef NE_SANITY_CHECK
603 xfer_count++;
604 #endif
605 }
606 } else {
607 insb(NE_BASE + NE_DATAPORT, buf, count);
608 }
609
610 #ifdef NE_SANITY_CHECK
611 /* This was for the ALPHA version only, but enough people have
612 been encountering problems so it is still here. If you see
613 this message you either 1) have a slightly incompatible clone
614 or 2) have noise/speed problems with your bus. */
615
616 if (ei_debug > 1)
617 {
618 /* DMA termination address check... */
619 int addr, tries = 20;
620 do {
621 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
622 -- it's broken for Rx on some cards! */
623 int high = inb_p(nic_base + EN0_RSARHI);
624 int low = inb_p(nic_base + EN0_RSARLO);
625 addr = (high << 8) + low;
626 if (((ring_offset + xfer_count) & 0xff) == low)
627 break;
628 } while (--tries > 0);
629 if (tries <= 0)
630 printk(KERN_WARNING "%s: RX transfer address mismatch,"
631 "%#4.4x (expected) vs. %#4.4x (actual).\n",
632 dev->name, ring_offset + xfer_count, addr);
633 }
634 #endif
635 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
636 ei_status.dmaing &= ~0x01;
637 }
638
ne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)639 static void ne_block_output(struct net_device *dev, int count,
640 const unsigned char *buf, const int start_page)
641 {
642 int nic_base = NE_BASE;
643 unsigned long dma_start;
644 #ifdef NE_SANITY_CHECK
645 int retries = 0;
646 #endif
647
648 /* Round the count up for word writes. Do we need to do this?
649 What effect will an odd byte count have on the 8390?
650 I should check someday. */
651
652 if (ei_status.word16 && (count & 0x01))
653 count++;
654
655 /* This *shouldn't* happen. If it does, it's the last thing you'll see */
656 if (ei_status.dmaing)
657 {
658 printk(KERN_EMERG "%s: DMAing conflict in ne_block_output."
659 "[DMAstat:%d][irqlock:%d]\n",
660 dev->name, ei_status.dmaing, ei_status.irqlock);
661 return;
662 }
663 ei_status.dmaing |= 0x01;
664 /* We should already be in page 0, but to be safe... */
665 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
666
667 #ifdef NE_SANITY_CHECK
668 retry:
669 #endif
670
671 #ifdef NE8390_RW_BUGFIX
672 /* Handle the read-before-write bug the same way as the
673 Crynwr packet driver -- the NatSemi method doesn't work.
674 Actually this doesn't always work either, but if you have
675 problems with your NEx000 this is better than nothing! */
676
677 outb_p(0x42, nic_base + EN0_RCNTLO);
678 outb_p(0x00, nic_base + EN0_RCNTHI);
679 outb_p(0x42, nic_base + EN0_RSARLO);
680 outb_p(0x00, nic_base + EN0_RSARHI);
681 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
682 /* Make certain that the dummy read has occurred. */
683 udelay(6);
684 #endif
685
686 outb_p(ENISR_RDC, nic_base + EN0_ISR);
687
688 /* Now the normal output. */
689 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
690 outb_p(count >> 8, nic_base + EN0_RCNTHI);
691 outb_p(0x00, nic_base + EN0_RSARLO);
692 outb_p(start_page, nic_base + EN0_RSARHI);
693
694 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
695 if (ei_status.word16) {
696 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
697 } else {
698 outsb(NE_BASE + NE_DATAPORT, buf, count);
699 }
700
701 dma_start = jiffies;
702
703 #ifdef NE_SANITY_CHECK
704 /* This was for the ALPHA version only, but enough people have
705 been encountering problems so it is still here. */
706
707 if (ei_debug > 1)
708 {
709 /* DMA termination address check... */
710 int addr, tries = 20;
711 do {
712 int high = inb_p(nic_base + EN0_RSARHI);
713 int low = inb_p(nic_base + EN0_RSARLO);
714 addr = (high << 8) + low;
715 if ((start_page << 8) + count == addr)
716 break;
717 } while (--tries > 0);
718
719 if (tries <= 0)
720 {
721 printk(KERN_WARNING "%s: Tx packet transfer address mismatch,"
722 "%#4.4x (expected) vs. %#4.4x (actual).\n",
723 dev->name, (start_page << 8) + count, addr);
724 if (retries++ == 0)
725 goto retry;
726 }
727 }
728 #endif
729
730 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
731 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
732 printk(KERN_WARNING "%s: timeout waiting for Tx RDC.\n", dev->name);
733 ne_reset_8390(dev);
734 NS8390_init(dev,1);
735 break;
736 }
737
738 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
739 ei_status.dmaing &= ~0x01;
740 return;
741 }
742
743
744 #ifdef MODULE
745 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
746 static struct net_device dev_ne[MAX_NE_CARDS];
747 static int io[MAX_NE_CARDS];
748 static int irq[MAX_NE_CARDS];
749 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
750
751 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
752 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
753 MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
754 MODULE_PARM_DESC(io, "I/O base address(es),required");
755 MODULE_PARM_DESC(irq, "IRQ number(s)");
756 MODULE_PARM_DESC(bad, "Accept card(s) with bad signatures");
757 MODULE_DESCRIPTION("NE1000/NE2000 ISA/PnP Ethernet driver");
758 MODULE_LICENSE("GPL");
759
760 /* This is set up so that no ISA autoprobe takes place. We can't guarantee
761 that the ne2k probe is the last 8390 based probe to take place (as it
762 is at boot) and so the probe will get confused by any other 8390 cards.
763 ISA device autoprobes on a running machine are not recommended anyway. */
764
init_module(void)765 int init_module(void)
766 {
767 int this_dev, found = 0;
768
769 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
770 struct net_device *dev = &dev_ne[this_dev];
771 dev->irq = irq[this_dev];
772 dev->mem_end = bad[this_dev];
773 dev->base_addr = io[this_dev];
774 dev->init = ne_probe;
775 if (register_netdev(dev) == 0) {
776 found++;
777 continue;
778 }
779 if (found != 0) { /* Got at least one. */
780 return 0;
781 }
782 if (io[this_dev] != 0)
783 printk(KERN_WARNING "ne.c: No NE*000 card found at i/o = %#x\n", io[this_dev]);
784 else
785 printk(KERN_NOTICE "ne.c: You must supply \"io=0xNNN\" value(s) for ISA cards.\n");
786 return -ENXIO;
787 }
788 return 0;
789 }
790
cleanup_module(void)791 void cleanup_module(void)
792 {
793 int this_dev;
794
795 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
796 struct net_device *dev = &dev_ne[this_dev];
797 if (dev->priv != NULL) {
798 void *priv = dev->priv;
799 struct pci_dev *idev = (struct pci_dev *)ei_status.priv;
800 if (idev)
801 idev->deactivate(idev);
802 free_irq(dev->irq, dev);
803 release_region(dev->base_addr, NE_IO_EXTENT);
804 unregister_netdev(dev);
805 kfree(priv);
806 }
807 }
808 }
809 #endif /* MODULE */
810
811
812 /*
813 * Local variables:
814 * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne.c"
815 * version-control: t
816 * kept-new-versions: 5
817 * End:
818 */
819