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[linux-2.6] / drivers / net / ne2.c
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1da177e4
LT		 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
60static 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>
ff5688ae 78#include <linux/jiffies.h>
1da177e4
LT		 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: */
114static unsigned int addresses[7] __initdata =
115 {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
116static int irqs[4] __initdata = {3, 4, 5, 9};
117
118/* From the D-Link ADF file: */
119static unsigned int dlink_addresses[4] __initdata =
120 {0x300, 0x320, 0x340, 0x360};
121static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
122
123struct ne2_adapters_t {
124 unsigned int id;
125 char *name;
126};
127
128static 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
136extern int netcard_probe(struct net_device *dev);
137
138static int ne2_probe1(struct net_device *dev, int slot);
139
140static int ne_open(struct net_device *dev);
141static int ne_close(struct net_device *dev);
142
143static void ne_reset_8390(struct net_device *dev);
144static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
145 int ring_page);
146static void ne_block_input(struct net_device *dev, int count,
147 struct sk_buff *skb, int ring_offset);
148static void ne_block_output(struct net_device *dev, const int count,
149 const unsigned char *buf, const int start_page);
150
151
152/*
153 * special code to read the DE-320's MAC address EEPROM. In contrast to a
154 * standard NE design, this is a serial EEPROM (93C46) that has to be read
155 * bit by bit. The EEPROM cotrol port at base + 0x1e has the following
156 * layout:
157 *
158 * Bit 0 = Data out (read from EEPROM)
159 * Bit 1 = Data in (write to EEPROM)
160 * Bit 2 = Clock
161 * Bit 3 = Chip Select
162 * Bit 7 = ~50 kHz clock for defined delays
163 *
164 */
165
166static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
167{
168 int z;
169 unsigned char v1, v2;
170
171 /* write the value to the NIC EEPROM register */
172
173 outb(value, addr + 0x1e);
174
175 /* now wait the clock line to toggle twice. Effectively, we are
176 waiting (at least) for one clock cycle */
177
178 for (z = 0; z < 2; z++) {
179 do {
180 v1 = inb(addr + 0x1e);
181 v2 = inb(addr + 0x1e);
182 }
183 while (!((v1 ^ v2) & 0x80));
184 }
185}
186
187static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
188{
189 /* shift data bit into correct position */
190
191 bit = bit << 1;
192
193 /* write value, keep clock line high for two cycles */
194
195 dlink_put_eeprom(0x09 | bit, addr);
196 dlink_put_eeprom(0x0d | bit, addr);
197 dlink_put_eeprom(0x0d | bit, addr);
198 dlink_put_eeprom(0x09 | bit, addr);
199}
200
201static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
202{
203 int z;
204
205 /* adjust bits so that they are left-aligned in a 16-bit-word */
206
207 value = value << (16 - len);
208
209 /* shift bits out to the EEPROM */
210
211 for (z = 0; z < len; z++) {
212 dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
213 value = value << 1;
214 }
215}
216
217static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
218{
219 int z;
220 unsigned int value = 0;
221
222 /* pull the CS line low for a moment. This resets the EEPROM-
223 internal logic, and makes it ready for a new command. */
224
225 dlink_put_eeprom(0x01, addr);
226 dlink_put_eeprom(0x09, addr);
227
228 /* send one start bit, read command (1 - 0), plus the address to
229 the EEPROM */
230
231 dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
232
233 /* get the data word. We clock by sending 0s to the EEPROM, which
234 get ignored during the read process */
235
236 for (z = 0; z < 16; z++) {
237 dlink_send_eeprom_bit(0, addr);
238 value = (value << 1) | (inb(addr + 0x1e) & 0x01);
239 }
240
241 return value;
242}
243
244/*
245 * Note that at boot, this probe only picks up one card at a time.
246 */
247
248static int __init do_ne2_probe(struct net_device *dev)
249{
250 static int current_mca_slot = -1;
251 int i;
252 int adapter_found = 0;
253
254 SET_MODULE_OWNER(dev);
255
256 /* Do not check any supplied i/o locations.
257 POS registers usually don't fail :) */
258
259 /* MCA cards have POS registers.
260 Autodetecting MCA cards is extremely simple.
261 Just search for the card. */
262
263 for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
264 current_mca_slot =
265 mca_find_unused_adapter(ne2_adapters[i].id, 0);
266
267 if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
268 int res;
269 mca_set_adapter_name(current_mca_slot,
270 ne2_adapters[i].name);
271 mca_mark_as_used(current_mca_slot);
272
273 res = ne2_probe1(dev, current_mca_slot);
274 if (res)
275 mca_mark_as_unused(current_mca_slot);
276 return res;
277 }
278 }
279 return -ENODEV;
280}
281
1da177e4
LT		 282#ifndef MODULE
283struct net_device * __init ne2_probe(int unit)
284{
285 struct net_device *dev = alloc_ei_netdev();
286 int err;
287
288 if (!dev)
289 return ERR_PTR(-ENOMEM);
290
291 sprintf(dev->name, "eth%d", unit);
292 netdev_boot_setup_check(dev);
293
294 err = do_ne2_probe(dev);
295 if (err)
296 goto out;
1da177e4 297 return dev;
1da177e4
LT		 298out:
299 free_netdev(dev);
300 return ERR_PTR(err);
301}
302#endif
303
304static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
305{
306 int len=0;
307
308 len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
309 len += sprintf(buf+len, "Driver written by Wim Dumon ");
310 len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
311 len += sprintf(buf+len, "Modified by ");
312 len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
313 len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
314 len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
315 len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
316 len += sprintf(buf+len, "IRQ : %d\n", dev->irq);
317
318#define HW_ADDR(i) dev->dev_addr[i]
319 len += sprintf(buf+len, "HW addr : %x:%x:%x:%x:%x:%x\n",
320 HW_ADDR(0), HW_ADDR(1), HW_ADDR(2),
321 HW_ADDR(3), HW_ADDR(4), HW_ADDR(5) );
322#undef HW_ADDR
323
324 return len;
325}
326
327static int __init ne2_probe1(struct net_device *dev, int slot)
328{
329 int i, base_addr, irq, retval;
330 unsigned char POS;
331 unsigned char SA_prom[32];
332 const char *name = "NE/2";
333 int start_page, stop_page;
334 static unsigned version_printed;
335
336 if (ei_debug && version_printed++ == 0)
337 printk(version);
338
339 printk("NE/2 ethercard found in slot %d:", slot);
340
341 /* Read base IO and IRQ from the POS-registers */
342 POS = mca_read_stored_pos(slot, 2);
343 if(!(POS % 2)) {
344 printk(" disabled.\n");
345 return -ENODEV;
346 }
347
348 /* handle different POS register structure for D-Link card */
349
350 if (mca_read_stored_pos(slot, 0) == 0xea) {
351 base_addr = dlink_addresses[(POS >> 5) & 0x03];
352 irq = dlink_irqs[(POS >> 2) & 0x07];
353 }
354 else {
355 i = (POS & 0xE)>>1;
356 /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
357 " en zou het moeten werken -> %d\n", i);
358 The above line was for remote testing, thanx to sdog ... */
359 base_addr = addresses[i - 1];
360 irq = irqs[(POS & 0x60)>>5];
361 }
362
363 if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
364 return -EBUSY;
365
366#ifdef DEBUG
367 printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
368 base_addr, irq);
369#endif
370
371#ifndef CRYNWR_WAY
372 /* Reset the card the way they do it in the Crynwr packet driver */
373 for (i=0; i<8; i++)
374 outb(0x0, base_addr + NE_RESET);
375 inb(base_addr + NE_RESET);
376 outb(0x21, base_addr + NE_CMD);
377 if (inb(base_addr + NE_CMD) != 0x21) {
378 printk("NE/2 adapter not responding\n");
379 retval = -ENODEV;
380 goto out;
381 }
382
383 /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
384 my RAM is okay. Suppose your memory is broken. Then this test
385 should fail and you won't be able to use your card. But if I do not
386 test, you won't be able to use your card, neither. So this test
387 won't help you. */
388
389#else /* _I_ never tested it this way .. Go ahead and try ...*/
390 /* Reset card. Who knows what dain-bramaged state it was left in. */
391 {
392 unsigned long reset_start_time = jiffies;
393
394 /* DON'T change these to inb_p/outb_p or reset will fail on
395 clones.. */
396 outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
397
398 while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 399 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
1da177e4
LT		 400 printk(" not found (no reset ack).\n");
401 retval = -ENODEV;
402 goto out;
403 }
404
405 outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */
406 }
407#endif
408
409
410 /* Read the 16 bytes of station address PROM.
411 We must first initialize registers, similar to
412 NS8390_init(eifdev, 0).
413 We can't reliably read the SAPROM address without this.
414 (I learned the hard way!). */
415 {
416 struct {
417 unsigned char value, offset;
418 } program_seq[] = {
419 /* Select page 0 */
420 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
421 {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */
422 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
423 {0x00, EN0_RCNTHI},
424 {0x00, EN0_IMR}, /* Mask completion irq. */
425 {0xFF, EN0_ISR},
426 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
427 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
428 {32, EN0_RCNTLO},
429 {0x00, EN0_RCNTHI},
430 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
431 {0x00, EN0_RSARHI},
432 {E8390_RREAD+E8390_START, E8390_CMD},
433 };
434
435 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
436 outb_p(program_seq[i].value, base_addr +
437 program_seq[i].offset);
438
439 }
440 for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
441 SA_prom[i] = inb(base_addr + NE_DATAPORT);
442 }
443
444 /* I don't know whether the previous sequence includes the general
445 board reset procedure, so better don't omit it and just overwrite
446 the garbage read from a DE-320 with correct stuff. */
447
448 if (mca_read_stored_pos(slot, 0) == 0xea) {
449 unsigned int v;
450
451 for (i = 0; i < 3; i++) {
452 v = dlink_get_eeprom(i, base_addr);
453 SA_prom[(i << 1) ] = v & 0xff;
454 SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
455 }
456 }
457
458 start_page = NESM_START_PG;
459 stop_page = NESM_STOP_PG;
460
461 dev->irq=irq;
462
463 /* Snarf the interrupt now. There's no point in waiting since we cannot
464 share and the board will usually be enabled. */
465 retval = request_irq(dev->irq, ei_interrupt, 0, DRV_NAME, dev);
466 if (retval) {
467 printk (" unable to get IRQ %d (irqval=%d).\n",
468 dev->irq, retval);
469 goto out;
470 }
471
472 dev->base_addr = base_addr;
473
474 for(i = 0; i < ETHER_ADDR_LEN; i++) {
475 printk(" %2.2x", SA_prom[i]);
476 dev->dev_addr[i] = SA_prom[i];
477 }
478
479 printk("\n%s: %s found at %#x, using IRQ %d.\n",
480 dev->name, name, base_addr, dev->irq);
481
482 mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
483
484 ei_status.name = name;
485 ei_status.tx_start_page = start_page;
486 ei_status.stop_page = stop_page;
487 ei_status.word16 = (2 == 2);
488
489 ei_status.rx_start_page = start_page + TX_PAGES;
490#ifdef PACKETBUF_MEMSIZE
491 /* Allow the packet buffer size to be overridden by know-it-alls. */
492 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
493#endif
494
495 ei_status.reset_8390 = &ne_reset_8390;
496 ei_status.block_input = &ne_block_input;
497 ei_status.block_output = &ne_block_output;
498 ei_status.get_8390_hdr = &ne_get_8390_hdr;
499
500 ei_status.priv = slot;
501
502 dev->open = &ne_open;
503 dev->stop = &ne_close;
504#ifdef CONFIG_NET_POLL_CONTROLLER
505 dev->poll_controller = ei_poll;
506#endif
507 NS8390_init(dev, 0);
b1fc5505 508
509 retval = register_netdev(dev);
510 if (retval)
511 goto out1;
1da177e4 512 return 0;
b1fc5505 513out1:
514 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
515 free_irq(dev->irq, dev);
1da177e4
LT		 516out:
517 release_region(base_addr, NE_IO_EXTENT);
518 return retval;
519}
520
521static int ne_open(struct net_device *dev)
522{
523 ei_open(dev);
524 return 0;
525}
526
527static int ne_close(struct net_device *dev)
528{
529 if (ei_debug > 1)
530 printk("%s: Shutting down ethercard.\n", dev->name);
531 ei_close(dev);
532 return 0;
533}
534
535/* Hard reset the card. This used to pause for the same period that a
536 8390 reset command required, but that shouldn't be necessary. */
537static void ne_reset_8390(struct net_device *dev)
538{
539 unsigned long reset_start_time = jiffies;
540
541 if (ei_debug > 1)
542 printk("resetting the 8390 t=%ld...", jiffies);
543
544 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
545 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
546
547 ei_status.txing = 0;
548 ei_status.dmaing = 0;
549
550 /* This check _should_not_ be necessary, omit eventually. */
551 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 552 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
1da177e4
LT		 553 printk("%s: ne_reset_8390() did not complete.\n",
554 dev->name);
555 break;
556 }
557 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
558}
559
560/* Grab the 8390 specific header. Similar to the block_input routine, but
561 we don't need to be concerned with ring wrap as the header will be at
562 the start of a page, so we optimize accordingly. */
563
564static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
565 int ring_page)
566{
567
568 int nic_base = dev->base_addr;
569
570 /* This *shouldn't* happen.
571 If it does, it's the last thing you'll see */
572 if (ei_status.dmaing) {
573 printk("%s: DMAing conflict in ne_get_8390_hdr "
574 "[DMAstat:%d][irqlock:%d].\n",
575 dev->name, ei_status.dmaing, ei_status.irqlock);
576 return;
577 }
578
579 ei_status.dmaing |= 0x01;
580 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
581 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
582 outb_p(0, nic_base + EN0_RCNTHI);
583 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
584 outb_p(ring_page, nic_base + EN0_RSARHI);
585 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
586
587 if (ei_status.word16)
588 insw(NE_BASE + NE_DATAPORT, hdr,
589 sizeof(struct e8390_pkt_hdr)>>1);
590 else
591 insb(NE_BASE + NE_DATAPORT, hdr,
592 sizeof(struct e8390_pkt_hdr));
593
594 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
595 ei_status.dmaing &= ~0x01;
596}
597
598/* Block input and output, similar to the Crynwr packet driver. If you
599 are porting to a new ethercard, look at the packet driver source for
600 hints. The NEx000 doesn't share the on-board packet memory -- you have
601 to put the packet out through the "remote DMA" dataport using outb. */
602
603static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
604 int ring_offset)
605{
606#ifdef NE_SANITY_CHECK
607 int xfer_count = count;
608#endif
609 int nic_base = dev->base_addr;
610 char *buf = skb->data;
611
612 /* This *shouldn't* happen.
613 If it does, it's the last thing you'll see */
614 if (ei_status.dmaing) {
615 printk("%s: DMAing conflict in ne_block_input "
616 "[DMAstat:%d][irqlock:%d].\n",
617 dev->name, ei_status.dmaing, ei_status.irqlock);
618 return;
619 }
620 ei_status.dmaing |= 0x01;
621 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
622 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
623 outb_p(count >> 8, nic_base + EN0_RCNTHI);
624 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
625 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
626 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
627 if (ei_status.word16) {
628 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
629 if (count & 0x01) {
630 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
631#ifdef NE_SANITY_CHECK
632 xfer_count++;
633#endif
634 }
635 } else {
636 insb(NE_BASE + NE_DATAPORT, buf, count);
637 }
638
639#ifdef NE_SANITY_CHECK
640 /* This was for the ALPHA version only, but enough people have
641 been encountering problems so it is still here. If you see
642 this message you either 1) have a slightly incompatible clone
643 or 2) have noise/speed problems with your bus. */
644 if (ei_debug > 1) { /* DMA termination address check... */
645 int addr, tries = 20;
646 do {
647 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
648 -- it's broken for Rx on some cards! */
649 int high = inb_p(nic_base + EN0_RSARHI);
650 int low = inb_p(nic_base + EN0_RSARLO);
651 addr = (high << 8) + low;
652 if (((ring_offset + xfer_count) & 0xff) == low)
653 break;
654 } while (--tries > 0);
655 if (tries <= 0)
656 printk("%s: RX transfer address mismatch,"
657 "%#4.4x (expected) vs. %#4.4x (actual).\n",
658 dev->name, ring_offset + xfer_count, addr);
659 }
660#endif
661 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
662 ei_status.dmaing &= ~0x01;
663}
664
665static void ne_block_output(struct net_device *dev, int count,
666 const unsigned char *buf, const int start_page)
667{
668 int nic_base = NE_BASE;
669 unsigned long dma_start;
670#ifdef NE_SANITY_CHECK
671 int retries = 0;
672#endif
673
674 /* Round the count up for word writes. Do we need to do this?
675 What effect will an odd byte count have on the 8390?
676 I should check someday. */
677 if (ei_status.word16 && (count & 0x01))
678 count++;
679
680 /* This *shouldn't* happen.
681 If it does, it's the last thing you'll see */
682 if (ei_status.dmaing) {
683 printk("%s: DMAing conflict in ne_block_output."
684 "[DMAstat:%d][irqlock:%d]\n",
685 dev->name, ei_status.dmaing, ei_status.irqlock);
686 return;
687 }
688 ei_status.dmaing |= 0x01;
689 /* We should already be in page 0, but to be safe... */
690 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
691
692#ifdef NE_SANITY_CHECK
693retry:
694#endif
695
696#ifdef NE8390_RW_BUGFIX
697 /* Handle the read-before-write bug the same way as the
698 Crynwr packet driver -- the NatSemi method doesn't work.
699 Actually this doesn't always work either, but if you have
700 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. */
707 SLOW_DOWN_IO;
708 SLOW_DOWN_IO;
709 SLOW_DOWN_IO;
710#endif
711
712 outb_p(ENISR_RDC, nic_base + EN0_ISR);
713
714 /* Now the normal output. */
715 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
716 outb_p(count >> 8, nic_base + EN0_RCNTHI);
717 outb_p(0x00, nic_base + EN0_RSARLO);
718 outb_p(start_page, nic_base + EN0_RSARHI);
719
720 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
721 if (ei_status.word16) {
722 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
723 } else {
724 outsb(NE_BASE + NE_DATAPORT, buf, count);
725 }
726
727 dma_start = jiffies;
728
729#ifdef NE_SANITY_CHECK
730 /* This was for the ALPHA version only, but enough people have
731 been encountering problems so it is still here. */
732
733 if (ei_debug > 1) { /* DMA termination address check... */
734 int addr, tries = 20;
735 do {
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)
740 break;
741 } while (--tries > 0);
742 if (tries <= 0) {
743 printk("%s: Tx packet transfer address mismatch,"
744 "%#4.4x (expected) vs. %#4.4x (actual).\n",
745 dev->name, (start_page << 8) + count, addr);
746 if (retries++ == 0)
747 goto retry;
748 }
749 }
750#endif
751
752 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
ff5688ae 753 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
1da177e4
LT		 754 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
755 ne_reset_8390(dev);
756 NS8390_init(dev,1);
757 break;
758 }
759
760 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
761 ei_status.dmaing &= ~0x01;
762 return;
763}
764
765
766#ifdef MODULE
767#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
768static struct net_device *dev_ne[MAX_NE_CARDS];
769static int io[MAX_NE_CARDS];
770static int irq[MAX_NE_CARDS];
771static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
772MODULE_LICENSE("GPL");
773
774module_param_array(io, int, NULL, 0);
775module_param_array(irq, int, NULL, 0);
776module_param_array(bad, int, NULL, 0);
777MODULE_PARM_DESC(io, "(ignored)");
778MODULE_PARM_DESC(irq, "(ignored)");
779MODULE_PARM_DESC(bad, "(ignored)");
780
781/* Module code fixed by David Weinehall */
782
783int init_module(void)
784{
785 struct net_device *dev;
786 int this_dev, found = 0;
787
788 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
789 dev = alloc_ei_netdev();
790 if (!dev)
791 break;
792 dev->irq = irq[this_dev];
793 dev->mem_end = bad[this_dev];
794 dev->base_addr = io[this_dev];
795 if (do_ne2_probe(dev) == 0) {
b1fc5505 796 dev_ne[found++] = dev;
797 continue;
1da177e4
LT		 798 }
799 free_netdev(dev);
800 break;
801 }
802 if (found)
803 return 0;
804 printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
805 return -ENXIO;
806}
807
64916f1e
DV		 808static void cleanup_card(struct net_device *dev)
809{
810 mca_mark_as_unused(ei_status.priv);
811 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
812 free_irq(dev->irq, dev);
813 release_region(dev->base_addr, NE_IO_EXTENT);
814}
815
1da177e4
LT		 816void cleanup_module(void)
817{
818 int this_dev;
819
820 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
821 struct net_device *dev = dev_ne[this_dev];
822 if (dev) {
823 unregister_netdev(dev);
824 cleanup_card(dev);
825 free_netdev(dev);
826 }
827 }
828}
829#endif /* MODULE */
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