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/version.h>
64
65 #include <linux/kernel.h>
66 #include <linux/sched.h>
67 #include <linux/types.h>
68 #include <linux/fcntl.h>
69 #include <linux/interrupt.h>
70 #include <linux/ptrace.h>
71 #include <linux/ioport.h>
72 #include <linux/in.h>
73 #include <linux/slab.h>
74 #include <linux/string.h>
75 #include <asm/system.h>
76 #include <asm/bitops.h>
77 #include <asm/io.h>
78 #include <asm/dma.h>
79 #include <linux/errno.h>
80 #include <linux/init.h>
81 #include <linux/mca.h>
82
83 #include <linux/netdevice.h>
84 #include <linux/etherdevice.h>
85 #include <linux/skbuff.h>
86 #include "8390.h"
87
88
89
90 /* Some defines that people can play with if so inclined. */
91
92 /* Do we perform extra sanity checks on stuff ? */
93 /* #define NE_SANITY_CHECK */
94
95 /* Do we implement the read before write bugfix ? */
96 /* #define NE_RW_BUGFIX */
97
98 /* Do we have a non std. amount of memory? (in units of 256 byte pages) */
99 /* #define PACKETBUF_MEMSIZE 0x40 */
100
101
102 /* ---- No user-serviceable parts below ---- */
103
104 #define NE_BASE (dev->base_addr)
105 #define NE_CMD 0x00
106 #define NE_DATAPORT 0x10 /* NatSemi-defined port window offset. */
107 #define NE_RESET 0x20 /* Issue a read to reset, a write to clear. */
108 #define NE_IO_EXTENT 0x30
109
110 #define NE1SM_START_PG 0x20 /* First page of TX buffer */
111 #define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
112 #define NESM_START_PG 0x40 /* First page of TX buffer */
113 #define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
114
115 /* From the .ADF file: */
116 static unsigned int addresses[7] __initdata =
117 {0x1000, 0x2020, 0x8020, 0xa0a0, 0xb0b0, 0xc0c0, 0xc3d0};
118 static int irqs[4] __initdata = {3, 4, 5, 9};
119
120 /* From the D-Link ADF file: */
121 static unsigned int dlink_addresses[4] __initdata =
122 {0x300, 0x320, 0x340, 0x360};
123 static int dlink_irqs[8] __initdata = {3, 4, 5, 9, 10, 11, 14, 15};
124
125 struct ne2_adapters_t {
126 unsigned int id;
127 char *name;
128 };
129
130 static struct ne2_adapters_t ne2_adapters[] __initdata = {
131 { 0x6354, "Arco Ethernet Adapter AE/2" },
132 { 0x70DE, "Compex ENET-16 MC/P" },
133 { 0x7154, "Novell Ethernet Adapter NE/2" },
134 { 0x56ea, "D-Link DE-320CT" },
135 { 0x0000, NULL }
136 };
137
138 extern int netcard_probe(struct net_device *dev);
139
140 static int ne2_probe1(struct net_device *dev, int slot);
141
142 static int ne_open(struct net_device *dev);
143 static int ne_close(struct net_device *dev);
144
145 static void ne_reset_8390(struct net_device *dev);
146 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
147 int ring_page);
148 static void ne_block_input(struct net_device *dev, int count,
149 struct sk_buff *skb, int ring_offset);
150 static void ne_block_output(struct net_device *dev, const int count,
151 const unsigned char *buf, const int start_page);
152
153
154 /*
155 * special code to read the DE-320's MAC address EEPROM. In contrast to a
156 * standard NE design, this is a serial EEPROM (93C46) that has to be read
157 * bit by bit. The EEPROM cotrol port at base + 0x1e has the following
158 * layout:
159 *
160 * Bit 0 = Data out (read from EEPROM)
161 * Bit 1 = Data in (write to EEPROM)
162 * Bit 2 = Clock
163 * Bit 3 = Chip Select
164 * Bit 7 = ~50 kHz clock for defined delays
165 *
166 */
167
dlink_put_eeprom(unsigned char value,unsigned int addr)168 static void __init dlink_put_eeprom(unsigned char value, unsigned int addr)
169 {
170 int z;
171 unsigned char v1, v2;
172
173 /* write the value to the NIC EEPROM register */
174
175 outb(value, addr + 0x1e);
176
177 /* now wait the clock line to toggle twice. Effectively, we are
178 waiting (at least) for one clock cycle */
179
180 for (z = 0; z < 2; z++) {
181 do {
182 v1 = inb(addr + 0x1e);
183 v2 = inb(addr + 0x1e);
184 }
185 while (!((v1 ^ v2) & 0x80));
186 }
187 }
188
dlink_send_eeprom_bit(unsigned int bit,unsigned int addr)189 static void __init dlink_send_eeprom_bit(unsigned int bit, unsigned int addr)
190 {
191 /* shift data bit into correct position */
192
193 bit = bit << 1;
194
195 /* write value, keep clock line high for two cycles */
196
197 dlink_put_eeprom(0x09 | bit, addr);
198 dlink_put_eeprom(0x0d | bit, addr);
199 dlink_put_eeprom(0x0d | bit, addr);
200 dlink_put_eeprom(0x09 | bit, addr);
201 }
202
dlink_send_eeprom_word(unsigned int value,unsigned int len,unsigned int addr)203 static void __init dlink_send_eeprom_word(unsigned int value, unsigned int len, unsigned int addr)
204 {
205 int z;
206
207 /* adjust bits so that they are left-aligned in a 16-bit-word */
208
209 value = value << (16 - len);
210
211 /* shift bits out to the EEPROM */
212
213 for (z = 0; z < len; z++) {
214 dlink_send_eeprom_bit((value & 0x8000) >> 15, addr);
215 value = value << 1;
216 }
217 }
218
dlink_get_eeprom(unsigned int eeaddr,unsigned int addr)219 static unsigned int __init dlink_get_eeprom(unsigned int eeaddr, unsigned int addr)
220 {
221 int z;
222 unsigned int value = 0;
223
224 /* pull the CS line low for a moment. This resets the EEPROM-
225 internal logic, and makes it ready for a new command. */
226
227 dlink_put_eeprom(0x01, addr);
228 dlink_put_eeprom(0x09, addr);
229
230 /* send one start bit, read command (1 - 0), plus the address to
231 the EEPROM */
232
233 dlink_send_eeprom_word(0x0180 | (eeaddr & 0x3f), 9, addr);
234
235 /* get the data word. We clock by sending 0s to the EEPROM, which
236 get ignored during the read process */
237
238 for (z = 0; z < 16; z++) {
239 dlink_send_eeprom_bit(0, addr);
240 value = (value << 1) | (inb(addr + 0x1e) & 0x01);
241 }
242
243 return value;
244 }
245
246 /*
247 * Note that at boot, this probe only picks up one card at a time.
248 */
249
ne2_probe(struct net_device * dev)250 int __init ne2_probe(struct net_device *dev)
251 {
252 static int current_mca_slot = -1;
253 int i;
254 int adapter_found = 0;
255
256 SET_MODULE_OWNER(dev);
257
258 /* Do not check any supplied i/o locations.
259 POS registers usually don't fail :) */
260
261 /* MCA cards have POS registers.
262 Autodetecting MCA cards is extremely simple.
263 Just search for the card. */
264
265 for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
266 current_mca_slot =
267 mca_find_unused_adapter(ne2_adapters[i].id, 0);
268
269 if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
270 mca_set_adapter_name(current_mca_slot,
271 ne2_adapters[i].name);
272 mca_mark_as_used(current_mca_slot);
273
274 return ne2_probe1(dev, current_mca_slot);
275 }
276 }
277 return -ENODEV;
278 }
279
280
ne2_procinfo(char * buf,int slot,struct net_device * dev)281 static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
282 {
283 int len=0;
284
285 len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
286 len += sprintf(buf+len, "Driver written by Wim Dumon ");
287 len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
288 len += sprintf(buf+len, "Modified by ");
289 len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
290 len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
291 len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
292 len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
293 len += sprintf(buf+len, "IRQ : %d\n", dev->irq);
294
295 #define HW_ADDR(i) dev->dev_addr[i]
296 len += sprintf(buf+len, "HW addr : %x:%x:%x:%x:%x:%x\n",
297 HW_ADDR(0), HW_ADDR(1), HW_ADDR(2),
298 HW_ADDR(3), HW_ADDR(4), HW_ADDR(5) );
299 #undef HW_ADDR
300
301 return len;
302 }
303
ne2_probe1(struct net_device * dev,int slot)304 static int __init ne2_probe1(struct net_device *dev, int slot)
305 {
306 int i, base_addr, irq, retval;
307 unsigned char POS;
308 unsigned char SA_prom[32];
309 const char *name = "NE/2";
310 int start_page, stop_page;
311 static unsigned version_printed;
312
313 if (ei_debug && version_printed++ == 0)
314 printk(version);
315
316 printk("NE/2 ethercard found in slot %d:", slot);
317
318 /* Read base IO and IRQ from the POS-registers */
319 POS = mca_read_stored_pos(slot, 2);
320 if(!(POS % 2)) {
321 printk(" disabled.\n");
322 return -ENODEV;
323 }
324
325 /* handle different POS register structure for D-Link card */
326
327 if (mca_read_stored_pos(slot, 0) == 0xea) {
328 base_addr = dlink_addresses[(POS >> 5) & 0x03];
329 irq = dlink_irqs[(POS >> 2) & 0x07];
330 }
331 else {
332 i = (POS & 0xE)>>1;
333 /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
334 " en zou het moeten werken -> %d\n", i);
335 The above line was for remote testing, thanx to sdog ... */
336 base_addr = addresses[i - 1];
337 irq = irqs[(POS & 0x60)>>5];
338 }
339
340 if (!request_region(base_addr, NE_IO_EXTENT, dev->name))
341 return -EBUSY;
342
343 #ifdef DEBUG
344 printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
345 base_addr, irq);
346 #endif
347
348 #ifndef CRYNWR_WAY
349 /* Reset the card the way they do it in the Crynwr packet driver */
350 for (i=0; i<8; i++)
351 outb(0x0, base_addr + NE_RESET);
352 inb(base_addr + NE_RESET);
353 outb(0x21, base_addr + NE_CMD);
354 if (inb(base_addr + NE_CMD) != 0x21) {
355 printk("NE/2 adapter not responding\n");
356 retval = -ENODEV;
357 goto out;
358 }
359
360 /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
361 my RAM is okay. Suppose your memory is broken. Then this test
362 should fail and you won't be able to use your card. But if I do not
363 test, you won't be able to use your card, neither. So this test
364 won't help you. */
365
366 #else /* _I_ never tested it this way .. Go ahead and try ...*/
367 /* Reset card. Who knows what dain-bramaged state it was left in. */
368 {
369 unsigned long reset_start_time = jiffies;
370
371 /* DON'T change these to inb_p/outb_p or reset will fail on
372 clones.. */
373 outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
374
375 while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
376 if (jiffies - reset_start_time > 2*HZ/100) {
377 printk(" not found (no reset ack).\n");
378 retval = -ENODEV;
379 goto out;
380 }
381
382 outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */
383 }
384 #endif
385
386
387 /* Read the 16 bytes of station address PROM.
388 We must first initialize registers, similar to
389 NS8390_init(eifdev, 0).
390 We can't reliably read the SAPROM address without this.
391 (I learned the hard way!). */
392 {
393 struct {
394 unsigned char value, offset;
395 } program_seq[] = {
396 /* Select page 0 */
397 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
398 {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */
399 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
400 {0x00, EN0_RCNTHI},
401 {0x00, EN0_IMR}, /* Mask completion irq. */
402 {0xFF, EN0_ISR},
403 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
404 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
405 {32, EN0_RCNTLO},
406 {0x00, EN0_RCNTHI},
407 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
408 {0x00, EN0_RSARHI},
409 {E8390_RREAD+E8390_START, E8390_CMD},
410 };
411
412 for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++)
413 outb_p(program_seq[i].value, base_addr +
414 program_seq[i].offset);
415
416 }
417 for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
418 SA_prom[i] = inb(base_addr + NE_DATAPORT);
419 }
420
421 /* I don't know whether the previous sequence includes the general
422 board reset procedure, so better don't omit it and just overwrite
423 the garbage read from a DE-320 with correct stuff. */
424
425 if (mca_read_stored_pos(slot, 0) == 0xea) {
426 unsigned int v;
427
428 for (i = 0; i < 3; i++) {
429 v = dlink_get_eeprom(i, base_addr);
430 SA_prom[(i << 1) ] = v & 0xff;
431 SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
432 }
433 }
434
435 start_page = NESM_START_PG;
436 stop_page = NESM_STOP_PG;
437
438 dev->irq=irq;
439
440 /* Snarf the interrupt now. There's no point in waiting since we cannot
441 share and the board will usually be enabled. */
442 retval = request_irq(dev->irq, ei_interrupt, 0, dev->name, dev);
443 if (retval) {
444 printk (" unable to get IRQ %d (irqval=%d).\n",
445 dev->irq, retval);
446 goto out;
447 }
448
449 dev->base_addr = base_addr;
450
451 /* Allocate dev->priv and fill in 8390 specific dev fields. */
452 if (ethdev_init(dev)) {
453 printk (" unable to get memory for dev->priv.\n");
454 free_irq(dev->irq, dev);
455 retval = -ENOMEM;
456 goto out;
457 }
458
459 for(i = 0; i < ETHER_ADDR_LEN; i++) {
460 printk(" %2.2x", SA_prom[i]);
461 dev->dev_addr[i] = SA_prom[i];
462 }
463
464 printk("\n%s: %s found at %#x, using IRQ %d.\n",
465 dev->name, name, base_addr, dev->irq);
466
467 mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
468
469 ei_status.name = name;
470 ei_status.tx_start_page = start_page;
471 ei_status.stop_page = stop_page;
472 ei_status.word16 = (2 == 2);
473
474 ei_status.rx_start_page = start_page + TX_PAGES;
475 #ifdef PACKETBUF_MEMSIZE
476 /* Allow the packet buffer size to be overridden by know-it-alls. */
477 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
478 #endif
479
480 ei_status.reset_8390 = &ne_reset_8390;
481 ei_status.block_input = &ne_block_input;
482 ei_status.block_output = &ne_block_output;
483 ei_status.get_8390_hdr = &ne_get_8390_hdr;
484
485 ei_status.priv = slot;
486
487 dev->open = &ne_open;
488 dev->stop = &ne_close;
489 NS8390_init(dev, 0);
490 return 0;
491 out:
492 release_region(base_addr, NE_IO_EXTENT);
493 return retval;
494 }
495
ne_open(struct net_device * dev)496 static int ne_open(struct net_device *dev)
497 {
498 ei_open(dev);
499 return 0;
500 }
501
ne_close(struct net_device * dev)502 static int ne_close(struct net_device *dev)
503 {
504 if (ei_debug > 1)
505 printk("%s: Shutting down ethercard.\n", dev->name);
506 ei_close(dev);
507 return 0;
508 }
509
510 /* Hard reset the card. This used to pause for the same period that a
511 8390 reset command required, but that shouldn't be necessary. */
ne_reset_8390(struct net_device * dev)512 static void ne_reset_8390(struct net_device *dev)
513 {
514 unsigned long reset_start_time = jiffies;
515
516 if (ei_debug > 1)
517 printk("resetting the 8390 t=%ld...", jiffies);
518
519 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
520 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
521
522 ei_status.txing = 0;
523 ei_status.dmaing = 0;
524
525 /* This check _should_not_ be necessary, omit eventually. */
526 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
527 if (jiffies - reset_start_time > 2*HZ/100) {
528 printk("%s: ne_reset_8390() did not complete.\n",
529 dev->name);
530 break;
531 }
532 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
533 }
534
535 /* Grab the 8390 specific header. Similar to the block_input routine, but
536 we don't need to be concerned with ring wrap as the header will be at
537 the start of a page, so we optimize accordingly. */
538
ne_get_8390_hdr(struct net_device * dev,struct e8390_pkt_hdr * hdr,int ring_page)539 static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
540 int ring_page)
541 {
542
543 int nic_base = dev->base_addr;
544
545 /* This *shouldn't* happen.
546 If it does, it's the last thing you'll see */
547 if (ei_status.dmaing) {
548 printk("%s: DMAing conflict in ne_get_8390_hdr "
549 "[DMAstat:%d][irqlock:%d].\n",
550 dev->name, ei_status.dmaing, ei_status.irqlock);
551 return;
552 }
553
554 ei_status.dmaing |= 0x01;
555 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
556 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
557 outb_p(0, nic_base + EN0_RCNTHI);
558 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
559 outb_p(ring_page, nic_base + EN0_RSARHI);
560 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
561
562 if (ei_status.word16)
563 insw(NE_BASE + NE_DATAPORT, hdr,
564 sizeof(struct e8390_pkt_hdr)>>1);
565 else
566 insb(NE_BASE + NE_DATAPORT, hdr,
567 sizeof(struct e8390_pkt_hdr));
568
569 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
570 ei_status.dmaing &= ~0x01;
571 }
572
573 /* Block input and output, similar to the Crynwr packet driver. If you
574 are porting to a new ethercard, look at the packet driver source for
575 hints. The NEx000 doesn't share the on-board packet memory -- you have
576 to put the packet out through the "remote DMA" dataport using outb. */
577
ne_block_input(struct net_device * dev,int count,struct sk_buff * skb,int ring_offset)578 static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
579 int ring_offset)
580 {
581 #ifdef NE_SANITY_CHECK
582 int xfer_count = count;
583 #endif
584 int nic_base = dev->base_addr;
585 char *buf = skb->data;
586
587 /* This *shouldn't* happen.
588 If it does, it's the last thing you'll see */
589 if (ei_status.dmaing) {
590 printk("%s: DMAing conflict in ne_block_input "
591 "[DMAstat:%d][irqlock:%d].\n",
592 dev->name, ei_status.dmaing, ei_status.irqlock);
593 return;
594 }
595 ei_status.dmaing |= 0x01;
596 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
597 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
598 outb_p(count >> 8, nic_base + EN0_RCNTHI);
599 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
600 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
601 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
602 if (ei_status.word16) {
603 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
604 if (count & 0x01) {
605 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
606 #ifdef NE_SANITY_CHECK
607 xfer_count++;
608 #endif
609 }
610 } else {
611 insb(NE_BASE + NE_DATAPORT, buf, count);
612 }
613
614 #ifdef NE_SANITY_CHECK
615 /* This was for the ALPHA version only, but enough people have
616 been encountering problems so it is still here. If you see
617 this message you either 1) have a slightly incompatible clone
618 or 2) have noise/speed problems with your bus. */
619 if (ei_debug > 1) { /* DMA termination address check... */
620 int addr, tries = 20;
621 do {
622 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
623 -- it's broken for Rx on some cards! */
624 int high = inb_p(nic_base + EN0_RSARHI);
625 int low = inb_p(nic_base + EN0_RSARLO);
626 addr = (high << 8) + low;
627 if (((ring_offset + xfer_count) & 0xff) == low)
628 break;
629 } while (--tries > 0);
630 if (tries <= 0)
631 printk("%s: RX transfer address mismatch,"
632 "%#4.4x (expected) vs. %#4.4x (actual).\n",
633 dev->name, ring_offset + xfer_count, addr);
634 }
635 #endif
636 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
637 ei_status.dmaing &= ~0x01;
638 }
639
ne_block_output(struct net_device * dev,int count,const unsigned char * buf,const int start_page)640 static void ne_block_output(struct net_device *dev, int count,
641 const unsigned char *buf, const int start_page)
642 {
643 int nic_base = NE_BASE;
644 unsigned long dma_start;
645 #ifdef NE_SANITY_CHECK
646 int retries = 0;
647 #endif
648
649 /* Round the count up for word writes. Do we need to do this?
650 What effect will an odd byte count have on the 8390?
651 I should check someday. */
652 if (ei_status.word16 && (count & 0x01))
653 count++;
654
655 /* This *shouldn't* happen.
656 If it does, it's the last thing you'll see */
657 if (ei_status.dmaing) {
658 printk("%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 outb_p(0x42, nic_base + EN0_RCNTLO);
677 outb_p(0x00, nic_base + EN0_RCNTHI);
678 outb_p(0x42, nic_base + EN0_RSARLO);
679 outb_p(0x00, nic_base + EN0_RSARHI);
680 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
681 /* Make certain that the dummy read has occurred. */
682 SLOW_DOWN_IO;
683 SLOW_DOWN_IO;
684 SLOW_DOWN_IO;
685 #endif
686
687 outb_p(ENISR_RDC, nic_base + EN0_ISR);
688
689 /* Now the normal output. */
690 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
691 outb_p(count >> 8, nic_base + EN0_RCNTHI);
692 outb_p(0x00, nic_base + EN0_RSARLO);
693 outb_p(start_page, nic_base + EN0_RSARHI);
694
695 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
696 if (ei_status.word16) {
697 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
698 } else {
699 outsb(NE_BASE + NE_DATAPORT, buf, count);
700 }
701
702 dma_start = jiffies;
703
704 #ifdef NE_SANITY_CHECK
705 /* This was for the ALPHA version only, but enough people have
706 been encountering problems so it is still here. */
707
708 if (ei_debug > 1) { /* DMA termination address check... */
709 int addr, tries = 20;
710 do {
711 int high = inb_p(nic_base + EN0_RSARHI);
712 int low = inb_p(nic_base + EN0_RSARLO);
713 addr = (high << 8) + low;
714 if ((start_page << 8) + count == addr)
715 break;
716 } while (--tries > 0);
717 if (tries <= 0) {
718 printk("%s: Tx packet transfer address mismatch,"
719 "%#4.4x (expected) vs. %#4.4x (actual).\n",
720 dev->name, (start_page << 8) + count, addr);
721 if (retries++ == 0)
722 goto retry;
723 }
724 }
725 #endif
726
727 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
728 if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
729 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
730 ne_reset_8390(dev);
731 NS8390_init(dev,1);
732 break;
733 }
734
735 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
736 ei_status.dmaing &= ~0x01;
737 return;
738 }
739
740
741 #ifdef MODULE
742 #define MAX_NE_CARDS 4 /* Max number of NE cards per module */
743 static struct net_device dev_ne[MAX_NE_CARDS];
744 static int io[MAX_NE_CARDS];
745 static int irq[MAX_NE_CARDS];
746 static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
747 MODULE_LICENSE("GPL");
748
749 #ifdef MODULE_PARM
750 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
751 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
752 MODULE_PARM(bad, "1-" __MODULE_STRING(MAX_NE_CARDS) "i");
753 MODULE_PARM_DESC(io, "(ignored)");
754 MODULE_PARM_DESC(irq, "(ignored)");
755 MODULE_PARM_DESC(bad, "(ignored)");
756 #endif
757
758 /* Module code fixed by David Weinehall */
759
init_module(void)760 int init_module(void)
761 {
762 int this_dev, found = 0;
763
764 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
765 struct net_device *dev = &dev_ne[this_dev];
766 dev->irq = irq[this_dev];
767 dev->mem_end = bad[this_dev];
768 dev->base_addr = io[this_dev];
769 dev->init = ne2_probe;
770 if (register_netdev(dev) != 0) {
771 if (found != 0) return 0; /* Got at least one. */
772
773 printk(KERN_WARNING "ne2.c: No NE/2 card found.\n");
774 return -ENXIO;
775 }
776 found++;
777 }
778 return 0;
779 }
780
cleanup_module(void)781 void cleanup_module(void)
782 {
783 int this_dev;
784
785 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
786 struct net_device *dev = &dev_ne[this_dev];
787 if (dev->priv != NULL) {
788 mca_mark_as_unused(ei_status.priv);
789 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
790 kfree(dev->priv);
791 free_irq(dev->irq, dev);
792 release_region(dev->base_addr, NE_IO_EXTENT);
793 unregister_netdev(dev);
794 }
795 }
796 }
797 #endif /* MODULE */
798
799 /*
800 * Local variables:
801 * compile-command: "gcc -DKERNEL -Wall -O6 -fomit-frame-pointer -I/usr/src/linux/net/tcp -c ne2.c"
802 * version-control: t
803 * kept-new-versions: 5
804 * End:
805 */
806