1 /* ne2.c: A NE/2 Ethernet Driver for Linux. */
2 /*
3 Based on the NE2000 driver written by Donald Becker (1992-94).
4 modified by Wim Dumon (Apr 1996)
5
6 This software may be used and distributed according to the terms
7 of the GNU General Public License, incorporated herein by reference.
8
9 The author may be reached as wimpie@linux.cc.kuleuven.ac.be
10
11 Currently supported: NE/2
12 This patch was never tested on other MCA-ethernet adapters, but it
13 might work. Just give it a try and let me know if you have problems.
14 Also mail me if it really works, please!
15
16 Changelog:
17 Mon Feb 3 16:26:02 MET 1997
18 - adapted the driver to work with the 2.1.25 kernel
19 - multiple ne2 support (untested)
20 - module support (untested)
21
22 Fri Aug 28 00:18:36 CET 1998 (David Weinehall)
23 - fixed a few minor typos
24 - made the MODULE_PARM conditional (it only works with the v2.1.x kernels)
25 - fixed the module support (Now it's working...)
26
27 Mon Sep 7 19:01:44 CET 1998 (David Weinehall)
28 - added support for Arco Electronics AE/2-card (experimental)
29
30 Mon Sep 14 09:53:42 CET 1998 (David Weinehall)
31 - added support for Compex ENET-16MC/P (experimental)
32
33 Tue Sep 15 16:21:12 CET 1998 (David Weinehall, Magnus Jonsson, Tomas Ogren)
34 - Miscellaneous bugfixes
35
36 Tue Sep 19 16:21:12 CET 1998 (Magnus Jonsson)
37 - Cleanup
38
39 Wed Sep 23 14:33:34 CET 1998 (David Weinehall)
40 - Restructuring and rewriting for v2.1.x compliance
41
42 Wed Oct 14 17:19:21 CET 1998 (David Weinehall)
43 - Added code that unregisters irq and proc-info
44 - Version# bump
45
46 Mon Nov 16 15:28:23 CET 1998 (Wim Dumon)
47 - pass 'dev' as last parameter of request_irq in stead of 'NULL'
48
49 Wed Feb 7 21:24:00 CET 2001 (Alfred Arnold)
50 - added support for the D-Link DE-320CT
51
52 * WARNING
53 -------
54 This is alpha-test software. It is not guaranteed to work. As a
55 matter of fact, I'm quite sure there are *LOTS* of bugs in here. I
56 would like to hear from you if you use this driver, even if it works.
57 If it doesn't work, be sure to send me a mail with the problems !
58 */
59
60 static const char *version = "ne2.c:v0.91 Nov 16 1998 Wim Dumon <wimpie@kotnet.org>\n";
61
62 #include <linux/module.h>
63 #include <linux/kernel.h>
64 #include <linux/types.h>
65 #include <linux/fcntl.h>
66 #include <linux/interrupt.h>
67 #include <linux/ioport.h>
68 #include <linux/in.h>
69 #include <linux/slab.h>
70 #include <linux/string.h>
71 #include <linux/errno.h>
72 #include <linux/init.h>
73 #include <linux/mca-legacy.h>
74 #include <linux/netdevice.h>
75 #include <linux/etherdevice.h>
76 #include <linux/skbuff.h>
77 #include <linux/bitops.h>
78 #include <linux/jiffies.h>
79
80 #include <asm/system.h>
81 #include <asm/io.h>
82 #include <asm/dma.h>
83
84 #include "8390.h"
85
86 #define DRV_NAME "ne2"
87
88 /* Some defines that people can play with if so inclined. */
89
90 /* Do we perform extra sanity checks on stuff ? */
91 /* #define NE_SANITY_CHECK */
92
93 /* Do we implement the read before write bugfix ? */
94 /* #define NE_RW_BUGFIX */
95
96 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
97 /* #define PACKETBUF_MEMSIZE 0x40 */
98
99
100 /* ---- No user-serviceable parts below ---- */
101
102 #define NE_BASE (dev->base_addr)
103 #define NE_CMD 0x00
104 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
105 #define NE_RESET 0x20 /* Issue a read to reset, a write to clear. */
106 #define NE_IO_EXTENT 0x30
107
108 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
109 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
110 #define NESM_START_PG 0x40 /* First page of TX buffer */
111 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
112
113 /* From the .ADF file: */
114 static unsigned int addresses[7] __initdata =
115 {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
116 static int irqs[4] __initdata = {3, 4, 5, 9};
117
118 /* From the D-Link ADF file: */
119 static unsigned int dlink_addresses[4] __initdata =
120 {0x300, 0x320, 0x340, 0x360};
121 static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
122
123 struct ne2_adapters_t {
124 unsigned int id;
125 char *name;
126 };
127
128 static struct ne2_adapters_t ne2_adapters[] __initdata = {
129 { 0x6354, "Arco Ethernet Adapter AE/2" },
130 { 0x70DE, "Compex ENET-16 MC/P" },
131 { 0x7154, "Novell Ethernet Adapter NE/2" },
132 { 0x56ea, "D-Link DE-320CT" },
133 { 0x0000, NULL }
134 };
135
136 extern int netcard_probe(struct net_device *dev);
137
138 static int ne2_probe1(struct net_device *dev, int slot);
139
140 static void ne_reset_8390(struct net_device *dev);
141 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
142 int ring_page);
143 static void ne_block_input(struct net_device *dev, int count,
144 struct sk_buff *skb, int ring_offset);
145 static void ne_block_output(struct net_device *dev, const int count,
146 const unsigned char *buf, const int start_page);
147
148
149 /*
150 * special code to read the DE-320's MAC address EEPROM. In contrast to a
151 * standard NE design, this is a serial EEPROM (93C46) that has to be read
152 * bit by bit. The EEPROM cotrol port at base + 0x1e has the following
153 * layout:
154 *
155 * Bit 0 = Data out (read from EEPROM)
156 * Bit 1 = Data in (write to EEPROM)
157 * Bit 2 = Clock
158 * Bit 3 = Chip Select
159 * Bit 7 = ~50 kHz clock for defined delays
160 *
161 */
162
dlink_put_eeprom(unsigned char value,unsigned int addr)163 static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
164 {
165 int z;
166 unsigned char v1, v2;
167
168 /* write the value to the NIC EEPROM register */
169
170 outb(value, addr + 0x1e);
171
172 /* now wait the clock line to toggle twice. Effectively, we are
173 waiting (at least) for one clock cycle */
174
175 for (z = 0; z < 2; z++) {
176 do {
177 v1 = inb(addr + 0x1e);
178 v2 = inb(addr + 0x1e);
179 }
180 while (!((v1 ^ v2) & 0x80));
181 }
182 }
183
dlink_send_eeprom_bit(unsigned int bit,unsigned int addr)184 static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
185 {
186 /* shift data bit into correct position */
187
188 bit = bit << 1;
189
190 /* write value, keep clock line high for two cycles */
191
192 dlink_put_eeprom(0x09 | bit, addr);
193 dlink_put_eeprom(0x0d | bit, addr);
194 dlink_put_eeprom(0x0d | bit, addr);
195 dlink_put_eeprom(0x09 | bit, addr);
196 }
197
dlink_send_eeprom_word(unsigned int value,unsigned int len,unsigned int addr)198 static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
199 {
200 int z;
201
202 /* adjust bits so that they are left-aligned in a 16-bit-word */
203
204 value = value << (16 - len);
205
206 /* shift bits out to the EEPROM */
207
208 for (z = 0; z < len; z++) {
209 dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
210 value = value << 1;
211 }
212 }
213
dlink_get_eeprom(unsigned int eeaddr,unsigned int addr)214 static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
215 {
216 int z;
217 unsigned int value = 0;
218
219 /* pull the CS line low for a moment. This resets the EEPROM-
220 internal logic, and makes it ready for a new command. */
221
222 dlink_put_eeprom(0x01, addr);
223 dlink_put_eeprom(0x09, addr);
224
225 /* send one start bit, read command (1 - 0), plus the address to
226 the EEPROM */
227
228 dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
229
230 /* get the data word. We clock by sending 0s to the EEPROM, which
231 get ignored during the read process */
232
233 for (z = 0; z < 16; z++) {
234 dlink_send_eeprom_bit(0, addr);
235 value = (value << 1) | (inb(addr + 0x1e) & 0x01);
236 }
237
238 return value;
239 }
240
241 /*
242 * Note that at boot, this probe only picks up one card at a time.
243 */
244
do_ne2_probe(struct net_device * dev)245 static int __init do_ne2_probe(struct net_device *dev)
246 {
247 static int current_mca_slot = -1;
248 int i;
249 int adapter_found = 0;
250
251 /* Do not check any supplied i/o locations.
252 POS registers usually don't fail :) */
253
254 /* MCA cards have POS registers.
255 Autodetecting MCA cards is extremely simple.
256 Just search for the card. */
257
258 for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
259 current_mca_slot =
260 mca_find_unused_adapter(ne2_adapters[i].id, 0);
261
262 if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
263 int res;
264 mca_set_adapter_name(current_mca_slot,
265 ne2_adapters[i].name);
266 mca_mark_as_used(current_mca_slot);
267
268 res = ne2_probe1(dev, current_mca_slot);
269 if (res)
270 mca_mark_as_unused(current_mca_slot);
271 return res;
272 }
273 }
274 return -ENODEV;
275 }
276
277 #ifndef MODULE
ne2_probe(int unit)278 struct net_device * __init ne2_probe(int unit)
279 {
280 struct net_device *dev = alloc_eip_netdev();
281 int err;
282
283 if (!dev)
284 return ERR_PTR(-ENOMEM);
285
286 sprintf(dev->name, "eth%d", unit);
287 netdev_boot_setup_check(dev);
288
289 err = do_ne2_probe(dev);
290 if (err)
291 goto out;
292 return dev;
293 out:
294 free_netdev(dev);
295 return ERR_PTR(err);
296 }
297 #endif
298
ne2_procinfo(char * buf,int slot,struct net_device * dev)299 static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
300 {
301 int len=0;
302
303 len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
304 len += sprintf(buf+len, "Driver written by Wim Dumon ");
305 len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
306 len += sprintf(buf+len, "Modified by ");
307 len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
308 len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
309 len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
310 len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
311 len += sprintf(buf+len, "IRQ : %d\n", dev->irq);
312 len += sprintf(buf+len, "HW addr : %pM\n", dev->dev_addr);
313
314 return len;
315 }
316
ne2_probe1(struct net_device * dev,int slot)317 static int __init ne2_probe1(struct net_device *dev, int slot)
318 {
319 int i, base_addr, irq, retval;
320 unsigned char POS;
321 unsigned char SA_prom[32];
322 const char *name = "NE/2";
323 int start_page, stop_page;
324 static unsigned version_printed;
325
326 if (ei_debug && version_printed++ == 0)
327 printk(version);
328
329 printk("NE/2 ethercard found in slot %d:", slot);
330
331 /* Read base IO and IRQ from the POS-registers */
332 POS = mca_read_stored_pos(slot, 2);
333 if(!(POS % 2)) {
334 printk(" disabled.\n");
335 return -ENODEV;
336 }
337
338 /* handle different POS register structure for D-Link card */
339
340 if (mca_read_stored_pos(slot, 0) == 0xea) {
341 base_addr = dlink_addresses[(POS >> 5) & 0x03];
342 irq = dlink_irqs[(POS >> 2) & 0x07];
343 }
344 else {
345 i = (POS & 0xE)>>1;
346 /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
347 " en zou het moeten werken -> %d\n", i);
348 The above line was for remote testing, thanx to sdog ... */
349 base_addr = addresses[i - 1];
350 irq = irqs[(POS & 0x60)>>5];
351 }
352
353 if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
354 return -EBUSY;
355
356 #ifdef DEBUG
357 printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
358 base_addr, irq);
359 #endif
360
361 #ifndef CRYNWR_WAY
362 /* Reset the card the way they do it in the Crynwr packet driver */
363 for (i=0; i<8; i++)
364 outb(0x0, base_addr + NE_RESET);
365 inb(base_addr + NE_RESET);
366 outb(0x21, base_addr + NE_CMD);
367 if (inb(base_addr + NE_CMD) != 0x21) {
368 printk("NE/2 adapter not responding\n");
369 retval = -ENODEV;
370 goto out;
371 }
372
373 /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
374 my RAM is okay. Suppose your memory is broken. Then this test
375 should fail and you won't be able to use your card. But if I do not
376 test, you won't be able to use your card, neither. So this test
377 won't help you. */
378
379 #else /* _I_ never tested it this way .. Go ahead and try ...*/
380 /* Reset card. Who knows what dain-bramaged state it was left in. */
381 {
382 unsigned long reset_start_time = jiffies;
383
384 /* DON'T change these to inb_p/outb_p or reset will fail on
385 clones.. */
386 outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
387
388 while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
389 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
390 printk(" not found (no reset ack).\n");
391 retval = -ENODEV;
392 goto out;
393 }
394
395 outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */
396 }
397 #endif
398
399
400 /* Read the 16 bytes of station address PROM.
401 We must first initialize registers, similar to
402 NS8390p_init(eifdev, 0).
403 We can't reliably read the SAPROM address without this.
404 (I learned the hard way!). */
405 {
406 struct {
407 unsigned char value, offset;
408 } program_seq[] = {
409 /* Select page 0 */
410 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
411 {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */
412 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
413 {0x00, EN0_RCNTHI},
414 {0x00, EN0_IMR}, /* Mask completion irq. */
415 {0xFF, EN0_ISR},
416 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
417 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
418 {32, EN0_RCNTLO},
419 {0x00, EN0_RCNTHI},
420 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
421 {0x00, EN0_RSARHI},
422 {E8390_RREAD+E8390_START, E8390_CMD},
423 };
424
425 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
426 outb_p(program_seq[i].value, base_addr +
427 program_seq[i].offset);
428
429 }
430 for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
431 SA_prom[i] = inb(base_addr + NE_DATAPORT);
432 }
433
434 /* I don't know whether the previous sequence includes the general
435 board reset procedure, so better don't omit it and just overwrite
436 the garbage read from a DE-320 with correct stuff. */
437
438 if (mca_read_stored_pos(slot, 0) == 0xea) {
439 unsigned int v;
440
441 for (i = 0; i < 3; i++) {
442 v = dlink_get_eeprom(i, base_addr);
443 SA_prom[(i << 1) ] = v & 0xff;
444 SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
445 }
446 }
447
448 start_page = NESM_START_PG;
449 stop_page = NESM_STOP_PG;
450
451 dev->irq=irq;
452
453 /* Snarf the interrupt now. There's no point in waiting since we cannot
454 share and the board will usually be enabled. */
455 retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev);
456 if (retval) {
457 printk (" unable to get IRQ %d (irqval=%d).\n",
458 dev->irq, retval);
459 goto out;
460 }
461
462 dev->base_addr = base_addr;
463
464 for(i = 0; i < ETHER_ADDR_LEN; i++)
465 dev->dev_addr[i] = SA_prom[i];
466
467 printk(" %pM\n", dev->dev_addr);
468
469 printk("%s: %s found at %#x, using IRQ %d.\n",
470 dev->name, name, base_addr, dev->irq);
471
472 mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
473
474 ei_status.name = name;
475 ei_status.tx_start_page = start_page;
476 ei_status.stop_page = stop_page;
477 ei_status.word16 = (2 == 2);
478
479 ei_status.rx_start_page = start_page + TX_PAGES;
480 #ifdef PACKETBUF_MEMSIZE
481 /* Allow the packet buffer size to be overridden by know-it-alls. */
482 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
483 #endif
484
485 ei_status.reset_8390 = &ne_reset_8390;
486 ei_status.block_input = &ne_block_input;
487 ei_status.block_output = &ne_block_output;
488 ei_status.get_8390_hdr = &ne_get_8390_hdr;
489
490 ei_status.priv = slot;
491
492 dev->netdev_ops = &eip_netdev_ops;
493 NS8390p_init(dev, 0);
494
495 retval = register_netdev(dev);
496 if (retval)
497 goto out1;
498 return 0;
499 out1:
500 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
501 free_irq(dev->irq, dev);
502 out:
503 release_region(base_addr, NE_IO_EXTENT);
504 return retval;
505 }
506
507 /* Hard reset the card. This used to pause for the same period that a
508 8390 reset command required, but that shouldn't be necessary. */
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("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 (time_after(jiffies, reset_start_time + 2*HZ/100)) {
525 printk("%s: ne_reset_8390() did not complete.\n",
526 dev->name);
527 break;
528 }
529 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
530 }
531
532 /* Grab the 8390 specific header. Similar to the block_input routine, but
533 we don't need to be concerned with ring wrap as the header will be at
534 the start of a page, so we optimize accordingly. */
535
ne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)536 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
537 int ring_page)
538 {
539
540 int nic_base = dev->base_addr;
541
542 /* This *shouldn't* happen.
543 If it does, it's the last thing you'll see */
544 if (ei_status.dmaing) {
545 printk("%s: DMAing conflict in ne_get_8390_hdr "
546 "[DMAstat:%d][irqlock:%d].\n",
547 dev->name, ei_status.dmaing, ei_status.irqlock);
548 return;
549 }
550
551 ei_status.dmaing |= 0x01;
552 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
553 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
554 outb_p(0, nic_base + EN0_RCNTHI);
555 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
556 outb_p(ring_page, nic_base + EN0_RSARHI);
557 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
558
559 if (ei_status.word16)
560 insw(NE_BASE + NE_DATAPORT, hdr,
561 sizeof(struct e8390_pkt_hdr)>>1);
562 else
563 insb(NE_BASE + NE_DATAPORT, hdr,
564 sizeof(struct e8390_pkt_hdr));
565
566 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
567 ei_status.dmaing &= ~0x01;
568 }
569
570 /* Block input and output, similar to the Crynwr packet driver. If you
571 are porting to a new ethercard, look at the packet driver source for
572 hints. The NEx000 doesn't share the on-board packet memory -- you have
573 to put the packet out through the "remote DMA" dataport using outb. */
574
ne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)575 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
576 int ring_offset)
577 {
578 #ifdef NE_SANITY_CHECK
579 int xfer_count = count;
580 #endif
581 int nic_base = dev->base_addr;
582 char *buf = skb->data;
583
584 /* This *shouldn't* happen.
585 If it does, it's the last thing you'll see */
586 if (ei_status.dmaing) {
587 printk("%s: DMAing conflict in ne_block_input "
588 "[DMAstat:%d][irqlock:%d].\n",
589 dev->name, ei_status.dmaing, ei_status.irqlock);
590 return;
591 }
592 ei_status.dmaing |= 0x01;
593 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
594 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
595 outb_p(count >> 8, nic_base + EN0_RCNTHI);
596 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
597 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
598 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
599 if (ei_status.word16) {
600 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
601 if (count & 0x01) {
602 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
603 #ifdef NE_SANITY_CHECK
604 xfer_count++;
605 #endif
606 }
607 } else {
608 insb(NE_BASE + NE_DATAPORT, buf, count);
609 }
610
611 #ifdef NE_SANITY_CHECK
612 /* This was for the ALPHA version only, but enough people have
613 been encountering problems so it is still here. If you see
614 this message you either 1) have a slightly incompatible clone
615 or 2) have noise/speed problems with your bus. */
616 if (ei_debug > 1) { /* DMA termination address check... */
617 int addr, tries = 20;
618 do {
619 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
620 -- it's broken for Rx on some cards! */
621 int high = inb_p(nic_base + EN0_RSARHI);
622 int low = inb_p(nic_base + EN0_RSARLO);
623 addr = (high << 8) + low;
624 if (((ring_offset + xfer_count) & 0xff) == low)
625 break;
626 } while (--tries > 0);
627 if (tries <= 0)
628 printk("%s: RX transfer address mismatch,"
629 "%#4.4x (expected) vs. %#4.4x (actual).\n",
630 dev->name, ring_offset + xfer_count, addr);
631 }
632 #endif
633 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
634 ei_status.dmaing &= ~0x01;
635 }
636
ne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)637 static void ne_block_output(struct net_device *dev, int count,
638 const unsigned char *buf, const int start_page)
639 {
640 int nic_base = NE_BASE;
641 unsigned long dma_start;
642 #ifdef NE_SANITY_CHECK
643 int retries = 0;
644 #endif
645
646 /* Round the count up for word writes. Do we need to do this?
647 What effect will an odd byte count have on the 8390?
648 I should check someday. */
649 if (ei_status.word16 && (count & 0x01))
650 count++;
651
652 /* This *shouldn't* happen.
653 If it does, it's the last thing you'll see */
654 if (ei_status.dmaing) {
655 printk("%s: DMAing conflict in ne_block_output."
656 "[DMAstat:%d][irqlock:%d]\n",
657 dev->name, ei_status.dmaing, ei_status.irqlock);
658 return;
659 }
660 ei_status.dmaing |= 0x01;
661 /* We should already be in page 0, but to be safe... */
662 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
663
664 #ifdef NE_SANITY_CHECK
665 retry:
666 #endif
667
668 #ifdef NE8390_RW_BUGFIX
669 /* Handle the read-before-write bug the same way as the
670 Crynwr packet driver -- the NatSemi method doesn't work.
671 Actually this doesn't always work either, but if you have
672 problems with your NEx000 this is better than nothing! */
673 outb_p(0x42, nic_base + EN0_RCNTLO);
674 outb_p(0x00, nic_base + EN0_RCNTHI);
675 outb_p(0x42, nic_base + EN0_RSARLO);
676 outb_p(0x00, nic_base + EN0_RSARHI);
677 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
678 /* Make certain that the dummy read has occurred. */
679 SLOW_DOWN_IO;
680 SLOW_DOWN_IO;
681 SLOW_DOWN_IO;
682 #endif
683
684 outb_p(ENISR_RDC, nic_base + EN0_ISR);
685
686 /* Now the normal output. */
687 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
688 outb_p(count >> 8, nic_base + EN0_RCNTHI);
689 outb_p(0x00, nic_base + EN0_RSARLO);
690 outb_p(start_page, nic_base + EN0_RSARHI);
691
692 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
693 if (ei_status.word16) {
694 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
695 } else {
696 outsb(NE_BASE + NE_DATAPORT, buf, count);
697 }
698
699 dma_start = jiffies;
700
701 #ifdef NE_SANITY_CHECK
702 /* This was for the ALPHA version only, but enough people have
703 been encountering problems so it is still here. */
704
705 if (ei_debug > 1) { /* DMA termination address check... */
706 int addr, tries = 20;
707 do {
708 int high = inb_p(nic_base + EN0_RSARHI);
709 int low = inb_p(nic_base + EN0_RSARLO);
710 addr = (high << 8) + low;
711 if ((start_page << 8) + count == addr)
712 break;
713 } while (--tries > 0);
714 if (tries <= 0) {
715 printk("%s: Tx packet transfer address mismatch,"
716 "%#4.4x (expected) vs. %#4.4x (actual).\n",
717 dev->name, (start_page << 8) + count, addr);
718 if (retries++ == 0)
719 goto retry;
720 }
721 }
722 #endif
723
724 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
725 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
726 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
727 ne_reset_8390(dev);
728 NS8390p_init(dev, 1);
729 break;
730 }
731
732 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
733 ei_status.dmaing &= ~0x01;
734 return;
735 }
736
737
738 #ifdef MODULE
739 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
740 static struct net_device *dev_ne[MAX_NE_CARDS];
741 static int io[MAX_NE_CARDS];
742 static int irq[MAX_NE_CARDS];
743 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
744 MODULE_LICENSE("GPL");
745
746 module_param_array(io, int, NULL, 0);
747 module_param_array(irq, int, NULL, 0);
748 module_param_array(bad, int, NULL, 0);
749 MODULE_PARM_DESC(io, "(ignored)");
750 MODULE_PARM_DESC(irq, "(ignored)");
751 MODULE_PARM_DESC(bad, "(ignored)");
752
753 /* Module code fixed by David Weinehall */
754
init_module(void)755 int __init init_module(void)
756 {
757 struct net_device *dev;
758 int this_dev, found = 0;
759
760 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
761 dev = alloc_eip_netdev();
762 if (!dev)
763 break;
764 dev->irq = irq[this_dev];
765 dev->mem_end = bad[this_dev];
766 dev->base_addr = io[this_dev];
767 if (do_ne2_probe(dev) == 0) {
768 dev_ne[found++] = dev;
769 continue;
770 }
771 free_netdev(dev);
772 break;
773 }
774 if (found)
775 return 0;
776 printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
777 return -ENXIO;
778 }
779
cleanup_card(struct net_device * dev)780 static void cleanup_card(struct net_device *dev)
781 {
782 mca_mark_as_unused(ei_status.priv);
783 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
784 free_irq(dev->irq, dev);
785 release_region(dev->base_addr, NE_IO_EXTENT);
786 }
787
cleanup_module(void)788 void __exit cleanup_module(void)
789 {
790 int this_dev;
791
792 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
793 struct net_device *dev = dev_ne[this_dev];
794 if (dev) {
795 unregister_netdev(dev);
796 cleanup_card(dev);
797 free_netdev(dev);
798 }
799 }
800 }
801 #endif /* MODULE */
802