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[deliverable/linux.git] / 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)
6aa20a22 31 - added support for Compex ENET-16MC/P (experimental)
1da177e4
LT		 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)
6aa20a22 47 - pass 'dev' as last parameter of request_irq in stead of 'NULL'
1da177e4
LT		 48
49 Wed Feb 7 21:24:00 CET 2001 (Alfred Arnold)
50 - added support for the D-Link DE-320CT
6aa20a22 51
1da177e4
LT		 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/*
6aa20a22 153 * special code to read the DE-320's MAC address EEPROM. In contrast to a
1da177e4 154 * standard NE design, this is a serial EEPROM (93C46) that has to be read
6aa20a22 155 * bit by bit. The EEPROM cotrol port at base + 0x1e has the following
1da177e4
LT		 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;
6aa20a22 221
1da177e4
LT		 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
6aa20a22 254 /* Do not check any supplied i/o locations.
1da177e4
LT		 255 POS registers usually don't fail :) */
256
6aa20a22
JG		 257 /* MCA cards have POS registers.
258 Autodetecting MCA cards is extremely simple.
1da177e4
LT		 259 Just search for the card. */
260
261 for(i = 0; (ne2_adapters[i].name != NULL) && !adapter_found; i++) {
6aa20a22 262 current_mca_slot =
1da177e4
LT		 263 mca_find_unused_adapter(ne2_adapters[i].id, 0);
264
265 if((current_mca_slot != MCA_NOTFOUND) && !adapter_found) {
266 int res;
6aa20a22 267 mca_set_adapter_name(current_mca_slot,
1da177e4
LT		 268 ne2_adapters[i].name);
269 mca_mark_as_used(current_mca_slot);
6aa20a22 270
1da177e4
LT		 271 res = ne2_probe1(dev, current_mca_slot);
272 if (res)
273 mca_mark_as_unused(current_mca_slot);
274 return res;
275 }
276 }
277 return -ENODEV;
278}
279
1da177e4
LT		 280#ifndef MODULE
281struct net_device * __init ne2_probe(int unit)
282{
055e5110 283 struct net_device *dev = alloc_eip_netdev();
1da177e4
LT		 284 int err;
285
286 if (!dev)
287 return ERR_PTR(-ENOMEM);
288
289 sprintf(dev->name, "eth%d", unit);
290 netdev_boot_setup_check(dev);
291
292 err = do_ne2_probe(dev);
293 if (err)
294 goto out;
1da177e4 295 return dev;
1da177e4
LT		 296out:
297 free_netdev(dev);
298 return ERR_PTR(err);
299}
300#endif
301
302static int ne2_procinfo(char *buf, int slot, struct net_device *dev)
303{
304 int len=0;
305
306 len += sprintf(buf+len, "The NE/2 Ethernet Adapter\n" );
307 len += sprintf(buf+len, "Driver written by Wim Dumon ");
6aa20a22 308 len += sprintf(buf+len, "<wimpie@kotnet.org>\n");
1da177e4
LT		 309 len += sprintf(buf+len, "Modified by ");
310 len += sprintf(buf+len, "David Weinehall <tao@acc.umu.se>\n");
311 len += sprintf(buf+len, "and by Magnus Jonsson <bigfoot@acc.umu.se>\n");
312 len += sprintf(buf+len, "Based on the original NE2000 drivers\n" );
313 len += sprintf(buf+len, "Base IO: %#x\n", (unsigned int)dev->base_addr);
314 len += sprintf(buf+len, "IRQ : %d\n", dev->irq);
e174961c 315 len += sprintf(buf+len, "HW addr : %pM\n", dev->dev_addr);
1da177e4
LT		 316
317 return len;
318}
319
320static int __init ne2_probe1(struct net_device *dev, int slot)
321{
322 int i, base_addr, irq, retval;
323 unsigned char POS;
324 unsigned char SA_prom[32];
325 const char *name = "NE/2";
326 int start_page, stop_page;
327 static unsigned version_printed;
328
329 if (ei_debug && version_printed++ == 0)
330 printk(version);
331
332 printk("NE/2 ethercard found in slot %d:", slot);
333
334 /* Read base IO and IRQ from the POS-registers */
335 POS = mca_read_stored_pos(slot, 2);
336 if(!(POS % 2)) {
337 printk(" disabled.\n");
338 return -ENODEV;
339 }
340
341 /* handle different POS register structure for D-Link card */
342
343 if (mca_read_stored_pos(slot, 0) == 0xea) {
344 base_addr = dlink_addresses[(POS >> 5) & 0x03];
345 irq = dlink_irqs[(POS >> 2) & 0x07];
346 }
347 else {
348 i = (POS & 0xE)>>1;
349 /* printk("Halleluja sdog, als er na de pijl een 1 staat is 1 - 1 == 0"
350 " en zou het moeten werken -> %d\n", i);
351 The above line was for remote testing, thanx to sdog ... */
352 base_addr = addresses[i - 1];
353 irq = irqs[(POS & 0x60)>>5];
354 }
355
356 if (!request_region(base_addr, NE_IO_EXTENT, DRV_NAME))
357 return -EBUSY;
358
359#ifdef DEBUG
360 printk("POS info : pos 2 = %#x ; base = %#x ; irq = %ld\n", POS,
361 base_addr, irq);
362#endif
363
364#ifndef CRYNWR_WAY
365 /* Reset the card the way they do it in the Crynwr packet driver */
6aa20a22 366 for (i=0; i<8; i++)
1da177e4
LT		 367 outb(0x0, base_addr + NE_RESET);
368 inb(base_addr + NE_RESET);
369 outb(0x21, base_addr + NE_CMD);
370 if (inb(base_addr + NE_CMD) != 0x21) {
371 printk("NE/2 adapter not responding\n");
372 retval = -ENODEV;
373 goto out;
374 }
375
376 /* In the crynwr sources they do a RAM-test here. I skip it. I suppose
377 my RAM is okay. Suppose your memory is broken. Then this test
378 should fail and you won't be able to use your card. But if I do not
379 test, you won't be able to use your card, neither. So this test
380 won't help you. */
381
382#else /* _I_ never tested it this way .. Go ahead and try ...*/
383 /* Reset card. Who knows what dain-bramaged state it was left in. */
6aa20a22 384 {
1da177e4
LT		 385 unsigned long reset_start_time = jiffies;
386
6aa20a22 387 /* DON'T change these to inb_p/outb_p or reset will fail on
1da177e4
LT		 388 clones.. */
389 outb(inb(base_addr + NE_RESET), base_addr + NE_RESET);
390
391 while ((inb_p(base_addr + EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 392 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
1da177e4
LT		 393 printk(" not found (no reset ack).\n");
394 retval = -ENODEV;
395 goto out;
396 }
397
398 outb_p(0xff, base_addr + EN0_ISR); /* Ack all intr. */
399 }
400#endif
401
402
403 /* Read the 16 bytes of station address PROM.
6aa20a22 404 We must first initialize registers, similar to
f0084a36 405 NS8390p_init(eifdev, 0).
1da177e4
LT		 406 We can't reliably read the SAPROM address without this.
407 (I learned the hard way!). */
408 {
6aa20a22
JG		 409 struct {
410 unsigned char value, offset;
1da177e4
LT		 411 } program_seq[] = {
412 /* Select page 0 */
6aa20a22 413 {E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD},
1da177e4
LT		 414 {0x49, EN0_DCFG}, /* Set WORD-wide (0x49) access. */
415 {0x00, EN0_RCNTLO}, /* Clear the count regs. */
416 {0x00, EN0_RCNTHI},
417 {0x00, EN0_IMR}, /* Mask completion irq. */
418 {0xFF, EN0_ISR},
419 {E8390_RXOFF, EN0_RXCR}, /* 0x20 Set to monitor */
420 {E8390_TXOFF, EN0_TXCR}, /* 0x02 and loopback mode. */
421 {32, EN0_RCNTLO},
422 {0x00, EN0_RCNTHI},
423 {0x00, EN0_RSARLO}, /* DMA starting at 0x0000. */
424 {0x00, EN0_RSARHI},
425 {E8390_RREAD+E8390_START, E8390_CMD},
426 };
427
ff8ac609 428 for (i = 0; i < ARRAY_SIZE(program_seq); i++)
6aa20a22 429 outb_p(program_seq[i].value, base_addr +
1da177e4
LT		 430 program_seq[i].offset);
431
432 }
433 for(i = 0; i < 6 /*sizeof(SA_prom)*/; i+=1) {
434 SA_prom[i] = inb(base_addr + NE_DATAPORT);
435 }
436
437 /* I don't know whether the previous sequence includes the general
438 board reset procedure, so better don't omit it and just overwrite
439 the garbage read from a DE-320 with correct stuff. */
440
441 if (mca_read_stored_pos(slot, 0) == 0xea) {
442 unsigned int v;
443
444 for (i = 0; i < 3; i++) {
445 v = dlink_get_eeprom(i, base_addr);
446 SA_prom[(i << 1) ] = v & 0xff;
447 SA_prom[(i << 1) + 1] = (v >> 8) & 0xff;
448 }
449 }
450
451 start_page = NESM_START_PG;
452 stop_page = NESM_STOP_PG;
453
454 dev->irq=irq;
455
456 /* Snarf the interrupt now. There's no point in waiting since we cannot
457 share and the board will usually be enabled. */
055e5110 458 retval = request_irq(dev->irq, eip_interrupt, 0, DRV_NAME, dev);
1da177e4 459 if (retval) {
6aa20a22 460 printk (" unable to get IRQ %d (irqval=%d).\n",
1da177e4
LT		 461 dev->irq, retval);
462 goto out;
463 }
464
465 dev->base_addr = base_addr;
466
0795af57 467 for(i = 0; i < ETHER_ADDR_LEN; i++)
1da177e4 468 dev->dev_addr[i] = SA_prom[i];
1da177e4 469
e174961c 470 printk(" %pM\n", dev->dev_addr);
0795af57
JP		 471
472 printk("%s: %s found at %#x, using IRQ %d.\n",
1da177e4
LT		 473 dev->name, name, base_addr, dev->irq);
474
475 mca_set_adapter_procfn(slot, (MCA_ProcFn) ne2_procinfo, dev);
476
477 ei_status.name = name;
478 ei_status.tx_start_page = start_page;
479 ei_status.stop_page = stop_page;
480 ei_status.word16 = (2 == 2);
481
482 ei_status.rx_start_page = start_page + TX_PAGES;
483#ifdef PACKETBUF_MEMSIZE
484 /* Allow the packet buffer size to be overridden by know-it-alls. */
485 ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
486#endif
487
488 ei_status.reset_8390 = &ne_reset_8390;
489 ei_status.block_input = &ne_block_input;
490 ei_status.block_output = &ne_block_output;
491 ei_status.get_8390_hdr = &ne_get_8390_hdr;
6aa20a22 492
1da177e4 493 ei_status.priv = slot;
6aa20a22 494
1da177e4
LT		 495 dev->open = &ne_open;
496 dev->stop = &ne_close;
497#ifdef CONFIG_NET_POLL_CONTROLLER
055e5110 498 dev->poll_controller = eip_poll;
1da177e4 499#endif
055e5110 500 NS8390p_init(dev, 0);
b1fc5505 501
502 retval = register_netdev(dev);
503 if (retval)
504 goto out1;
1da177e4 505 return 0;
b1fc5505 506out1:
507 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
508 free_irq(dev->irq, dev);
1da177e4
LT		 509out:
510 release_region(base_addr, NE_IO_EXTENT);
511 return retval;
512}
513
514static int ne_open(struct net_device *dev)
515{
055e5110 516 eip_open(dev);
1da177e4
LT		 517 return 0;
518}
519
520static int ne_close(struct net_device *dev)
521{
522 if (ei_debug > 1)
523 printk("%s: Shutting down ethercard.\n", dev->name);
055e5110 524 eip_close(dev);
1da177e4
LT		 525 return 0;
526}
527
528/* Hard reset the card. This used to pause for the same period that a
529 8390 reset command required, but that shouldn't be necessary. */
530static void ne_reset_8390(struct net_device *dev)
531{
532 unsigned long reset_start_time = jiffies;
533
6aa20a22 534 if (ei_debug > 1)
1da177e4
LT		 535 printk("resetting the 8390 t=%ld...", jiffies);
536
537 /* DON'T change these to inb_p/outb_p or reset will fail on clones. */
538 outb(inb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
539
540 ei_status.txing = 0;
541 ei_status.dmaing = 0;
542
543 /* This check _should_not_ be necessary, omit eventually. */
544 while ((inb_p(NE_BASE+EN0_ISR) & ENISR_RESET) == 0)
ff5688ae 545 if (time_after(jiffies, reset_start_time + 2*HZ/100)) {
6aa20a22 546 printk("%s: ne_reset_8390() did not complete.\n",
1da177e4
LT		 547 dev->name);
548 break;
549 }
550 outb_p(ENISR_RESET, NE_BASE + EN0_ISR); /* Ack intr. */
551}
552
553/* Grab the 8390 specific header. Similar to the block_input routine, but
554 we don't need to be concerned with ring wrap as the header will be at
555 the start of a page, so we optimize accordingly. */
556
6aa20a22 557static void ne_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
1da177e4
LT		 558 int ring_page)
559{
560
561 int nic_base = dev->base_addr;
562
6aa20a22 563 /* This *shouldn't* happen.
1da177e4
LT		 564 If it does, it's the last thing you'll see */
565 if (ei_status.dmaing) {
566 printk("%s: DMAing conflict in ne_get_8390_hdr "
567 "[DMAstat:%d][irqlock:%d].\n",
568 dev->name, ei_status.dmaing, ei_status.irqlock);
569 return;
570 }
571
572 ei_status.dmaing |= 0x01;
573 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
574 outb_p(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
575 outb_p(0, nic_base + EN0_RCNTHI);
576 outb_p(0, nic_base + EN0_RSARLO); /* On page boundary */
577 outb_p(ring_page, nic_base + EN0_RSARHI);
578 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
579
580 if (ei_status.word16)
6aa20a22 581 insw(NE_BASE + NE_DATAPORT, hdr,
1da177e4
LT		 582 sizeof(struct e8390_pkt_hdr)>>1);
583 else
6aa20a22 584 insb(NE_BASE + NE_DATAPORT, hdr,
1da177e4
LT		 585 sizeof(struct e8390_pkt_hdr));
586
587 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
588 ei_status.dmaing &= ~0x01;
589}
590
591/* Block input and output, similar to the Crynwr packet driver. If you
592 are porting to a new ethercard, look at the packet driver source for
593 hints. The NEx000 doesn't share the on-board packet memory -- you have
594 to put the packet out through the "remote DMA" dataport using outb. */
595
6aa20a22 596static void ne_block_input(struct net_device *dev, int count, struct sk_buff *skb,
1da177e4
LT		 597 int ring_offset)
598{
599#ifdef NE_SANITY_CHECK
600 int xfer_count = count;
601#endif
602 int nic_base = dev->base_addr;
603 char *buf = skb->data;
604
6aa20a22 605 /* This *shouldn't* happen.
1da177e4
LT		 606 If it does, it's the last thing you'll see */
607 if (ei_status.dmaing) {
608 printk("%s: DMAing conflict in ne_block_input "
609 "[DMAstat:%d][irqlock:%d].\n",
610 dev->name, ei_status.dmaing, ei_status.irqlock);
611 return;
612 }
613 ei_status.dmaing |= 0x01;
614 outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
615 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
616 outb_p(count >> 8, nic_base + EN0_RCNTHI);
617 outb_p(ring_offset & 0xff, nic_base + EN0_RSARLO);
618 outb_p(ring_offset >> 8, nic_base + EN0_RSARHI);
619 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
620 if (ei_status.word16) {
621 insw(NE_BASE + NE_DATAPORT,buf,count>>1);
622 if (count & 0x01) {
623 buf[count-1] = inb(NE_BASE + NE_DATAPORT);
624#ifdef NE_SANITY_CHECK
625 xfer_count++;
626#endif
627 }
628 } else {
629 insb(NE_BASE + NE_DATAPORT, buf, count);
630 }
631
632#ifdef NE_SANITY_CHECK
633 /* This was for the ALPHA version only, but enough people have
634 been encountering problems so it is still here. If you see
635 this message you either 1) have a slightly incompatible clone
636 or 2) have noise/speed problems with your bus. */
637 if (ei_debug > 1) { /* DMA termination address check... */
638 int addr, tries = 20;
639 do {
640 /* DON'T check for 'inb_p(EN0_ISR) & ENISR_RDC' here
641 -- it's broken for Rx on some cards! */
642 int high = inb_p(nic_base + EN0_RSARHI);
643 int low = inb_p(nic_base + EN0_RSARLO);
644 addr = (high << 8) + low;
645 if (((ring_offset + xfer_count) & 0xff) == low)
646 break;
647 } while (--tries > 0);
648 if (tries <= 0)
649 printk("%s: RX transfer address mismatch,"
650 "%#4.4x (expected) vs. %#4.4x (actual).\n",
651 dev->name, ring_offset + xfer_count, addr);
652 }
653#endif
654 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
655 ei_status.dmaing &= ~0x01;
656}
657
658static void ne_block_output(struct net_device *dev, int count,
659 const unsigned char *buf, const int start_page)
660{
661 int nic_base = NE_BASE;
662 unsigned long dma_start;
663#ifdef NE_SANITY_CHECK
664 int retries = 0;
665#endif
666
667 /* Round the count up for word writes. Do we need to do this?
668 What effect will an odd byte count have on the 8390?
669 I should check someday. */
670 if (ei_status.word16 && (count & 0x01))
671 count++;
672
6aa20a22 673 /* This *shouldn't* happen.
1da177e4
LT		 674 If it does, it's the last thing you'll see */
675 if (ei_status.dmaing) {
676 printk("%s: DMAing conflict in ne_block_output."
677 "[DMAstat:%d][irqlock:%d]\n",
678 dev->name, ei_status.dmaing, ei_status.irqlock);
679 return;
680 }
681 ei_status.dmaing |= 0x01;
682 /* We should already be in page 0, but to be safe... */
683 outb_p(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
684
685#ifdef NE_SANITY_CHECK
686retry:
687#endif
688
689#ifdef NE8390_RW_BUGFIX
690 /* Handle the read-before-write bug the same way as the
691 Crynwr packet driver -- the NatSemi method doesn't work.
692 Actually this doesn't always work either, but if you have
693 problems with your NEx000 this is better than nothing! */
694 outb_p(0x42, nic_base + EN0_RCNTLO);
695 outb_p(0x00, nic_base + EN0_RCNTHI);
696 outb_p(0x42, nic_base + EN0_RSARLO);
697 outb_p(0x00, nic_base + EN0_RSARHI);
698 outb_p(E8390_RREAD+E8390_START, nic_base + NE_CMD);
699 /* Make certain that the dummy read has occurred. */
700 SLOW_DOWN_IO;
701 SLOW_DOWN_IO;
702 SLOW_DOWN_IO;
703#endif
704
705 outb_p(ENISR_RDC, nic_base + EN0_ISR);
706
707 /* Now the normal output. */
708 outb_p(count & 0xff, nic_base + EN0_RCNTLO);
709 outb_p(count >> 8, nic_base + EN0_RCNTHI);
710 outb_p(0x00, nic_base + EN0_RSARLO);
711 outb_p(start_page, nic_base + EN0_RSARHI);
712
713 outb_p(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
714 if (ei_status.word16) {
715 outsw(NE_BASE + NE_DATAPORT, buf, count>>1);
716 } else {
717 outsb(NE_BASE + NE_DATAPORT, buf, count);
718 }
719
720 dma_start = jiffies;
721
722#ifdef NE_SANITY_CHECK
723 /* This was for the ALPHA version only, but enough people have
724 been encountering problems so it is still here. */
725
726 if (ei_debug > 1) { /* DMA termination address check... */
727 int addr, tries = 20;
728 do {
729 int high = inb_p(nic_base + EN0_RSARHI);
730 int low = inb_p(nic_base + EN0_RSARLO);
731 addr = (high << 8) + low;
732 if ((start_page << 8) + count == addr)
733 break;
734 } while (--tries > 0);
735 if (tries <= 0) {
736 printk("%s: Tx packet transfer address mismatch,"
737 "%#4.4x (expected) vs. %#4.4x (actual).\n",
738 dev->name, (start_page << 8) + count, addr);
739 if (retries++ == 0)
740 goto retry;
741 }
742 }
743#endif
744
745 while ((inb_p(nic_base + EN0_ISR) & ENISR_RDC) == 0)
ff5688ae 746 if (time_after(jiffies, dma_start + 2*HZ/100)) { /* 20ms */
1da177e4
LT		 747 printk("%s: timeout waiting for Tx RDC.\n", dev->name);
748 ne_reset_8390(dev);
055e5110 749 NS8390p_init(dev, 1);
1da177e4
LT		 750 break;
751 }
752
753 outb_p(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
754 ei_status.dmaing &= ~0x01;
755 return;
756}
757
758
759#ifdef MODULE
760#define MAX_NE_CARDS 4 /* Max number of NE cards per module */
761static struct net_device *dev_ne[MAX_NE_CARDS];
762static int io[MAX_NE_CARDS];
763static int irq[MAX_NE_CARDS];
764static int bad[MAX_NE_CARDS]; /* 0xbad = bad sig or no reset ack */
765MODULE_LICENSE("GPL");
766
767module_param_array(io, int, NULL, 0);
768module_param_array(irq, int, NULL, 0);
769module_param_array(bad, int, NULL, 0);
770MODULE_PARM_DESC(io, "(ignored)");
771MODULE_PARM_DESC(irq, "(ignored)");
772MODULE_PARM_DESC(bad, "(ignored)");
773
774/* Module code fixed by David Weinehall */
775
5d1f16c6 776int __init init_module(void)
1da177e4
LT		 777{
778 struct net_device *dev;
779 int this_dev, found = 0;
780
781 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
055e5110 782 dev = alloc_eip_netdev();
1da177e4
LT		 783 if (!dev)
784 break;
785 dev->irq = irq[this_dev];
786 dev->mem_end = bad[this_dev];
787 dev->base_addr = io[this_dev];
788 if (do_ne2_probe(dev) == 0) {
b1fc5505 789 dev_ne[found++] = dev;
790 continue;
1da177e4
LT		 791 }
792 free_netdev(dev);
793 break;
794 }
795 if (found)
796 return 0;
797 printk(KERN_WARNING "ne2.c: No NE/2 card found\n");
798 return -ENXIO;
799}
800
64916f1e
DV		 801static void cleanup_card(struct net_device *dev)
802{
803 mca_mark_as_unused(ei_status.priv);
804 mca_set_adapter_procfn( ei_status.priv, NULL, NULL);
805 free_irq(dev->irq, dev);
806 release_region(dev->base_addr, NE_IO_EXTENT);
807}
808
afc8eb46 809void __exit cleanup_module(void)
1da177e4
LT		 810{
811 int this_dev;
812
813 for (this_dev = 0; this_dev < MAX_NE_CARDS; this_dev++) {
814 struct net_device *dev = dev_ne[this_dev];
815 if (dev) {
816 unregister_netdev(dev);
817 cleanup_card(dev);
818 free_netdev(dev);
819 }
820 }
821}
822#endif /* MODULE */
Linux kernel - Deliverables
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