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[NET]: Nuke SET_MODULE_OWNER macro.
[linux-2.6-block.git] / drivers / net / 3c523.c
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1da177e4
LT		 1/*
2 net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip)
3
4
5 This is an extension to the Linux operating system, and is covered by the
6 same GNU General Public License that covers that work.
7
8 Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
9
10 This is basically Michael Hipp's ni52 driver, with a new probing
11 algorithm and some minor changes to the 82586 CA and reset routines.
12 Thanks a lot Michael for a really clean i82586 implementation! Unless
13 otherwise documented in ni52.c, any bugs are mine.
14
15 Contrary to the Ethernet-HOWTO, this isn't based on the 3c507 driver in
16 any way. The ni52 is a lot easier to modify.
17
18 sources:
19 ni52.c
20
21 Crynwr packet driver collection was a great reference for my first
22 attempt at this sucker. The 3c507 driver also helped, until I noticed
23 that ni52.c was a lot nicer.
24
25 EtherLink/MC: Micro Channel Ethernet Adapter Technical Reference
26 Manual, courtesy of 3Com CardFacts, documents the 3c523-specific
27 stuff. Information on CardFacts is found in the Ethernet HOWTO.
28 Also see <a href="http://www.3com.com/">
29
30 Microprocessor Communications Support Chips, T.J. Byers, ISBN
31 0-444-01224-9, has a section on the i82586. It tells you just enough
32 to know that you really don't want to learn how to program the chip.
33
34 The original device probe code was stolen from ps2esdi.c
35
36 Known Problems:
37 Since most of the code was stolen from ni52.c, you'll run across the
38 same bugs in the 0.62 version of ni52.c, plus maybe a few because of
39 the 3c523 idiosynchacies. The 3c523 has 16K of RAM though, so there
40 shouldn't be the overrun problem that the 8K ni52 has.
41
42 This driver is for a 16K adapter. It should work fine on the 64K
43 adapters, but it will only use one of the 4 banks of RAM. Modifying
44 this for the 64K version would require a lot of heinous bank
45 switching, which I'm sure not interested in doing. If you try to
46 implement a bank switching version, you'll basically have to remember
47 what bank is enabled and do a switch everytime you access a memory
48 location that's not current. You'll also have to remap pointers on
49 the driver side, because it only knows about 16K of the memory.
50 Anyone desperate or masochistic enough to try?
51
52 It seems to be stable now when multiple transmit buffers are used. I
53 can't see any performance difference, but then I'm working on a 386SX.
54
55 Multicast doesn't work. It doesn't even pretend to work. Don't use
56 it. Don't compile your kernel with multicast support. I don't know
57 why.
58
59 Features:
60 This driver is useable as a loadable module. If you try to specify an
61 IRQ or a IO address (via insmod 3c523.o irq=xx io=0xyyy), it will
62 search the MCA slots until it finds a 3c523 with the specified
63 parameters.
64
65 This driver does support multiple ethernet cards when used as a module
66 (up to MAX_3C523_CARDS, the default being 4)
67
68 This has been tested with both BNC and TP versions, internal and
69 external transceivers. Haven't tested with the 64K version (that I
70 know of).
71
72 History:
73 Jan 1st, 1996
74 first public release
75 Feb 4th, 1996
76 update to 1.3.59, incorporated multicast diffs from ni52.c
77 Feb 15th, 1996
78 added shared irq support
79 Apr 1999
80 added support for multiple cards when used as a module
81 added option to disable multicast as is causes problems
82 Ganesh Sittampalam <ganesh.sittampalam@magdalen.oxford.ac.uk>
83 Stuart Adamson <stuart.adamson@compsoc.net>
84 Nov 2001
85 added support for ethtool (jgarzik)
6aa20a22 86
1da177e4
LT		 87 $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $
88 */
89
90#define DRV_NAME "3c523"
91#define DRV_VERSION "17-Nov-2001"
92
93#include <linux/init.h>
94#include <linux/netdevice.h>
95#include <linux/etherdevice.h>
96#include <linux/module.h>
97#include <linux/kernel.h>
98#include <linux/string.h>
99#include <linux/errno.h>
100#include <linux/ioport.h>
101#include <linux/skbuff.h>
102#include <linux/slab.h>
103#include <linux/interrupt.h>
104#include <linux/delay.h>
105#include <linux/mca-legacy.h>
106#include <linux/ethtool.h>
107#include <linux/bitops.h>
ff5688ae 108#include <linux/jiffies.h>
1da177e4
LT		 109
110#include <asm/uaccess.h>
111#include <asm/processor.h>
112#include <asm/io.h>
113
114#include "3c523.h"
115
116/*************************************************************************/
117#define DEBUG /* debug on */
118#define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
119#undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */
120
121#define make32(ptr16) (p->memtop + (short) (ptr16) )
122#define make24(ptr32) ((char *) (ptr32) - p->base)
123#define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
124
125/*************************************************************************/
126/*
127 Tables to which we can map values in the configuration registers.
128 */
129static int irq_table[] __initdata = {
130 12, 7, 3, 9
131};
132
133static int csr_table[] __initdata = {
134 0x300, 0x1300, 0x2300, 0x3300
135};
136
137static int shm_table[] __initdata = {
138 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
139};
140
141/******************* how to calculate the buffers *****************************
142
143
144 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
145 * --------------- in a different (more stable?) mode. Only in this mode it's
146 * possible to configure the driver with 'NO_NOPCOMMANDS'
147
148sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
149sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
150sizeof(rfd) = 24; sizeof(rbd) = 12;
151sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
152sizeof(nop_cmd) = 8;
153
154 * if you don't know the driver, better do not change this values: */
155
156#define RECV_BUFF_SIZE 1524 /* slightly oversized */
157#define XMIT_BUFF_SIZE 1524 /* slightly oversized */
158#define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
159#define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
160#define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
161
162#if (NUM_XMIT_BUFFS == 1)
163#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
164#endif
165
166/**************************************************************************/
167
168#define DELAY(x) { mdelay(32 * x); }
169
170/* a much shorter delay: */
171#define DELAY_16(); { udelay(16) ; }
172
173/* wait for command with timeout: */
174#define WAIT_4_SCB_CMD() { int i; \
175 for(i=0;i<1024;i++) { \
176 if(!p->scb->cmd) break; \
177 DELAY_16(); \
178 if(i == 1023) { \
179 printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
180 dev->name,__LINE__); \
181 elmc_id_reset586(); } } }
182
7d12e780 183static irqreturn_t elmc_interrupt(int irq, void *dev_id);
1da177e4
LT		 184static int elmc_open(struct net_device *dev);
185static int elmc_close(struct net_device *dev);
186static int elmc_send_packet(struct sk_buff *, struct net_device *);
187static struct net_device_stats *elmc_get_stats(struct net_device *dev);
188static void elmc_timeout(struct net_device *dev);
189#ifdef ELMC_MULTICAST
190static void set_multicast_list(struct net_device *dev);
191#endif
7282d491 192static const struct ethtool_ops netdev_ethtool_ops;
1da177e4
LT		 193
194/* helper-functions */
195static int init586(struct net_device *dev);
196static int check586(struct net_device *dev, unsigned long where, unsigned size);
197static void alloc586(struct net_device *dev);
198static void startrecv586(struct net_device *dev);
199static void *alloc_rfa(struct net_device *dev, void *ptr);
200static void elmc_rcv_int(struct net_device *dev);
201static void elmc_xmt_int(struct net_device *dev);
202static void elmc_rnr_int(struct net_device *dev);
203
204struct priv {
205 struct net_device_stats stats;
206 unsigned long base;
207 char *memtop;
208 unsigned long mapped_start; /* Start of ioremap */
209 volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
210 volatile struct scp_struct *scp; /* volatile is important */
211 volatile struct iscp_struct *iscp; /* volatile is important */
212 volatile struct scb_struct *scb; /* volatile is important */
213 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
214#if (NUM_XMIT_BUFFS == 1)
215 volatile struct transmit_cmd_struct *xmit_cmds[2];
216 volatile struct nop_cmd_struct *nop_cmds[2];
217#else
218 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
219 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
220#endif
221 volatile int nop_point, num_recv_buffs;
222 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
223 volatile int xmit_count, xmit_last;
224 volatile int slot;
225};
226
227#define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
228#define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
229
230/* with interrupts disabled - this will clear the interrupt bit in the
231 3c523 control register, and won't put it back. This effectively
232 disables interrupts on the card. */
233#define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);}
234#define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
235
236/*************************************************************************/
237/*
238 Do a Channel Attention on the 3c523. This is extremely board dependent.
239 */
240static void elmc_do_attn586(int ioaddr, int ints)
241{
242 /* the 3c523 requires a minimum of 500 ns. The delays here might be
243 a little too large, and hence they may cut the performance of the
244 card slightly. If someone who knows a little more about Linux
245 timing would care to play with these, I'd appreciate it. */
246
247 /* this bit masking stuff is crap. I'd rather have separate
248 registers with strobe triggers for each of these functions. <sigh>
249 Ya take what ya got. */
250
251 outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
252 DELAY_16(); /* > 500 ns */
253 outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
254}
255
256/*************************************************************************/
257/*
258 Reset the 82586 on the 3c523. Also very board dependent.
259 */
260static void elmc_do_reset586(int ioaddr, int ints)
261{
262 /* toggle the RST bit low then high */
263 outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
264 DELAY_16(); /* > 500 ns */
265 outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
266
267 elmc_do_attn586(ioaddr, ints);
268}
269
270/**********************************************
271 * close device
272 */
273
274static int elmc_close(struct net_device *dev)
275{
276 netif_stop_queue(dev);
277 elmc_id_reset586(); /* the hard way to stop the receiver */
278 free_irq(dev->irq, dev);
279 return 0;
280}
281
282/**********************************************
283 * open device
284 */
285
286static int elmc_open(struct net_device *dev)
287{
288 int ret;
289
290 elmc_id_attn586(); /* disable interrupts */
291
1fb9df5d 292 ret = request_irq(dev->irq, &elmc_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM,
1da177e4
LT		 293 dev->name, dev);
294 if (ret) {
295 printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq);
296 elmc_id_reset586();
297 return ret;
298 }
299 alloc586(dev);
300 init586(dev);
301 startrecv586(dev);
302 netif_start_queue(dev);
303 return 0; /* most done by init */
304}
305
306/**********************************************
307 * Check to see if there's an 82586 out there.
308 */
309
310static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
311{
312 struct priv *p = (struct priv *) dev->priv;
313 char *iscp_addrs[2];
314 int i = 0;
315
316 p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
317 p->memtop = isa_bus_to_virt((unsigned long)where) + size;
318 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
319 memset((char *) p->scp, 0, sizeof(struct scp_struct));
320 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
321
322 iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
323 iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
324
325 for (i = 0; i < 2; i++) {
326 p->iscp = (struct iscp_struct *) iscp_addrs[i];
327 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
328
329 p->scp->iscp = make24(p->iscp);
330 p->iscp->busy = 1;
331
332 elmc_id_reset586();
333
334 /* reset586 does an implicit CA */
335
336 /* apparently, you sometimes have to kick the 82586 twice... */
337 elmc_id_attn586();
338 DELAY(1);
339
340 if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */
341 return 0;
342 }
343 }
344 return 1;
345}
346
347/******************************************************************
348 * set iscp at the right place, called by elmc_probe and open586.
349 */
350
351void alloc586(struct net_device *dev)
352{
353 struct priv *p = (struct priv *) dev->priv;
354
355 elmc_id_reset586();
356 DELAY(2);
357
358 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
359 p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
360 p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
361
362 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
363 memset((char *) p->scp, 0, sizeof(struct scp_struct));
364
365 p->scp->iscp = make24(p->iscp);
366 p->scp->sysbus = SYSBUSVAL;
367 p->iscp->scb_offset = make16(p->scb);
368
369 p->iscp->busy = 1;
370 elmc_id_reset586();
371 elmc_id_attn586();
372
373 DELAY(2);
374
375 if (p->iscp->busy) {
376 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
377 }
378 memset((char *) p->scb, 0, sizeof(struct scb_struct));
379}
380
381/*****************************************************************/
382
383static int elmc_getinfo(char *buf, int slot, void *d)
384{
385 int len = 0;
386 struct net_device *dev = (struct net_device *) d;
387 int i;
388
389 if (dev == NULL)
390 return len;
391
392 len += sprintf(buf + len, "Revision: 0x%x\n",
393 inb(dev->base_addr + ELMC_REVISION) & 0xf);
394 len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
395 len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
396 dev->base_addr + ELMC_IO_EXTENT);
397 len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
398 dev->mem_end - 1);
399 len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
400 "External" : "Internal");
401 len += sprintf(buf + len, "Device: %s\n", dev->name);
402 len += sprintf(buf + len, "Hardware Address:");
403 for (i = 0; i < 6; i++) {
404 len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
405 }
406 buf[len++] = '\n';
407 buf[len] = 0;
408
409 return len;
410} /* elmc_getinfo() */
411
412/*****************************************************************/
413
414static int __init do_elmc_probe(struct net_device *dev)
415{
416 static int slot;
417 int base_addr = dev->base_addr;
418 int irq = dev->irq;
419 u_char status = 0;
420 u_char revision = 0;
421 int i = 0;
422 unsigned int size = 0;
423 int retval;
424 struct priv *pr = dev->priv;
425
1da177e4
LT		 426 if (MCA_bus == 0) {
427 return -ENODEV;
428 }
429 /* search through the slots for the 3c523. */
430 slot = mca_find_adapter(ELMC_MCA_ID, 0);
431 while (slot != -1) {
432 status = mca_read_stored_pos(slot, 2);
433
434 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
435 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
6aa20a22 436
1da177e4
LT		 437 /*
438 If we're trying to match a specified irq or IO address,
439 we'll reject a match unless it's what we're looking for.
440 Also reject it if the card is already in use.
441 */
442
6aa20a22 443 if ((irq && irq != dev->irq) ||
1da177e4
LT		 444 (base_addr && base_addr != dev->base_addr)) {
445 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
446 continue;
447 }
448 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
449 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
450 continue;
451 }
452
453 /* found what we're looking for... */
454 break;
455 }
456
457 /* we didn't find any 3c523 in the slots we checked for */
458 if (slot == MCA_NOTFOUND)
459 return ((base_addr || irq) ? -ENXIO : -ENODEV);
460
461 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
462 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
463
464 /* if we get this far, adapter has been found - carry on */
465 printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
466
467 /* Now we extract configuration info from the card.
468 The 3c523 provides information in two of the POS registers, but
469 the second one is only needed if we want to tell the card what IRQ
470 to use. I suspect that whoever sets the thing up initially would
471 prefer we don't screw with those things.
472
473 Note that we read the status info when we found the card...
474
475 See 3c523.h for more details.
476 */
477
478 /* revision is stored in the first 4 bits of the revision register */
479 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
480
481 /* according to docs, we read the interrupt and write it back to
482 the IRQ select register, since the POST might not configure the IRQ
483 properly. */
484 switch (dev->irq) {
485 case 3:
486 mca_write_pos(slot, 3, 0x04);
487 break;
488 case 7:
489 mca_write_pos(slot, 3, 0x02);
490 break;
491 case 9:
492 mca_write_pos(slot, 3, 0x08);
493 break;
494 case 12:
495 mca_write_pos(slot, 3, 0x01);
496 break;
497 }
498
499 memset(pr, 0, sizeof(struct priv));
500 pr->slot = slot;
501
502 printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
503 dev->base_addr);
504
505 /* Determine if we're using the on-board transceiver (i.e. coax) or
506 an external one. The information is pretty much useless, but I
507 guess it's worth brownie points. */
508 dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
509
510 /* The 3c523 has a 24K chunk of memory. The first 16K is the
511 shared memory, while the last 8K is for the EtherStart BIOS ROM.
512 Which we don't care much about here. We'll just tell Linux that
513 we're using 16K. MCA won't permit address space conflicts caused
514 by not mapping the other 8K. */
515 dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
516
517 /* We're using MCA, so it's a given that the information about memory
518 size is correct. The Crynwr drivers do something like this. */
519
520 elmc_id_reset586(); /* seems like a good idea before checking it... */
521
522 size = 0x4000; /* check for 16K mem */
523 if (!check586(dev, dev->mem_start, size)) {
524 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
525 dev->mem_start);
526 retval = -ENODEV;
527 goto err_out;
528 }
529 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
530
531 pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
532 pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
533 alloc586(dev);
534
535 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
536
537 /* set number of receive-buffs according to memsize */
538 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
539
540 /* dump all the assorted information */
541 printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
6aa20a22 542 dev->irq, dev->if_port ? "ex" : "in",
1da177e4
LT		 543 dev->mem_start, dev->mem_end - 1);
544
545 /* The hardware address for the 3c523 is stored in the first six
546 bytes of the IO address. */
547 printk(KERN_INFO "%s: hardware address ", dev->name);
548 for (i = 0; i < 6; i++) {
549 dev->dev_addr[i] = inb(dev->base_addr + i);
550 printk(" %02x", dev->dev_addr[i]);
551 }
552 printk("\n");
553
554 dev->open = &elmc_open;
555 dev->stop = &elmc_close;
556 dev->get_stats = &elmc_get_stats;
557 dev->hard_start_xmit = &elmc_send_packet;
558 dev->tx_timeout = &elmc_timeout;
559 dev->watchdog_timeo = HZ;
560#ifdef ELMC_MULTICAST
561 dev->set_multicast_list = &set_multicast_list;
562#else
563 dev->set_multicast_list = NULL;
564#endif
565 dev->ethtool_ops = &netdev_ethtool_ops;
6aa20a22 566
1da177e4
LT		 567 /* note that we haven't actually requested the IRQ from the kernel.
568 That gets done in elmc_open(). I'm not sure that's such a good idea,
569 but it works, so I'll go with it. */
570
571#ifndef ELMC_MULTICAST
572 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
573#endif
574
b1fc5505 575 retval = register_netdev(dev);
576 if (retval)
577 goto err_out;
578
1da177e4
LT		 579 return 0;
580err_out:
581 mca_set_adapter_procfn(slot, NULL, NULL);
582 release_region(dev->base_addr, ELMC_IO_EXTENT);
583 return retval;
584}
6aa20a22 585
1da177e4
LT		 586static void cleanup_card(struct net_device *dev)
587{
588 mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
589 release_region(dev->base_addr, ELMC_IO_EXTENT);
590}
591
592#ifndef MODULE
593struct net_device * __init elmc_probe(int unit)
594{
595 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
596 int err;
597
598 if (!dev)
599 return ERR_PTR(-ENOMEM);
600
601 sprintf(dev->name, "eth%d", unit);
602 netdev_boot_setup_check(dev);
603
604 err = do_elmc_probe(dev);
605 if (err)
606 goto out;
1da177e4 607 return dev;
1da177e4
LT		 608out:
609 free_netdev(dev);
610 return ERR_PTR(err);
611}
612#endif
613
614/**********************************************
615 * init the chip (elmc-interrupt should be disabled?!)
616 * needs a correct 'allocated' memory
617 */
618
619static int init586(struct net_device *dev)
620{
621 void *ptr;
622 unsigned long s;
623 int i, result = 0;
624 struct priv *p = (struct priv *) dev->priv;
625 volatile struct configure_cmd_struct *cfg_cmd;
626 volatile struct iasetup_cmd_struct *ias_cmd;
627 volatile struct tdr_cmd_struct *tdr_cmd;
628 volatile struct mcsetup_cmd_struct *mc_cmd;
629 struct dev_mc_list *dmi = dev->mc_list;
630 int num_addrs = dev->mc_count;
631
632 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
633
634 cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
635 cfg_cmd->cmd_status = 0;
636 cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
637 cfg_cmd->cmd_link = 0xffff;
638
639 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
640 cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
641 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
642 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
643 cfg_cmd->priority = 0x00;
644 cfg_cmd->ifs = 0x60;
645 cfg_cmd->time_low = 0x00;
646 cfg_cmd->time_high = 0xf2;
647 cfg_cmd->promisc = 0;
648 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
649 cfg_cmd->promisc = 1;
650 dev->flags |= IFF_PROMISC;
651 }
652 cfg_cmd->carr_coll = 0x00;
653
654 p->scb->cbl_offset = make16(cfg_cmd);
655
656 p->scb->cmd = CUC_START; /* cmd.-unit start */
657 elmc_id_attn586();
658
659 s = jiffies; /* warning: only active with interrupts on !! */
660 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
ff5688ae 661 if (time_after(jiffies, s + 30*HZ/100))
1da177e4
LT		 662 break;
663 }
664
665 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
666 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
667 return 1;
668 }
669 /*
670 * individual address setup
671 */
672 ias_cmd = (struct iasetup_cmd_struct *) ptr;
673
674 ias_cmd->cmd_status = 0;
675 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
676 ias_cmd->cmd_link = 0xffff;
677
678 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
679
680 p->scb->cbl_offset = make16(ias_cmd);
681
682 p->scb->cmd = CUC_START; /* cmd.-unit start */
683 elmc_id_attn586();
684
685 s = jiffies;
686 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
ff5688ae 687 if (time_after(jiffies, s + 30*HZ/100))
1da177e4
LT		 688 break;
689 }
690
691 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
692 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
693 return 1;
694 }
695 /*
696 * TDR, wire check .. e.g. no resistor e.t.c
697 */
698 tdr_cmd = (struct tdr_cmd_struct *) ptr;
699
700 tdr_cmd->cmd_status = 0;
701 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
702 tdr_cmd->cmd_link = 0xffff;
703 tdr_cmd->status = 0;
704
705 p->scb->cbl_offset = make16(tdr_cmd);
706
707 p->scb->cmd = CUC_START; /* cmd.-unit start */
708 elmc_attn586();
709
710 s = jiffies;
711 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
ff5688ae 712 if (time_after(jiffies, s + 30*HZ/100)) {
1da177e4
LT		 713 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
714 result = 1;
715 break;
716 }
717 }
718
719 if (!result) {
720 DELAY(2); /* wait for result */
721 result = tdr_cmd->status;
722
723 p->scb->cmd = p->scb->status & STAT_MASK;
724 elmc_id_attn586(); /* ack the interrupts */
725
726 if (result & TDR_LNK_OK) {
727 /* empty */
728 } else if (result & TDR_XCVR_PRB) {
729 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
730 } else if (result & TDR_ET_OPN) {
731 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
732 } else if (result & TDR_ET_SRT) {
733 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
734 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
735 } else {
736 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
737 }
738 }
739 /*
740 * ack interrupts
741 */
742 p->scb->cmd = p->scb->status & STAT_MASK;
743 elmc_id_attn586();
744
745 /*
746 * alloc nop/xmit-cmds
747 */
748#if (NUM_XMIT_BUFFS == 1)
749 for (i = 0; i < 2; i++) {
750 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
751 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
752 p->nop_cmds[i]->cmd_status = 0;
753 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
754 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
755 }
756 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
757 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
758#else
759 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
760 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
761 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
762 p->nop_cmds[i]->cmd_status = 0;
763 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
764 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
765 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
766 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
767 }
768#endif
769
770 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
771
772 /*
773 * Multicast setup
774 */
775
776 if (dev->mc_count) {
777 /* I don't understand this: do we really need memory after the init? */
778 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
779 if (len <= 0) {
780 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
781 } else {
782 if (len < num_addrs) {
783 num_addrs = len;
784 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
785 dev->name, num_addrs);
786 }
787 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
788 mc_cmd->cmd_status = 0;
789 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
790 mc_cmd->cmd_link = 0xffff;
791 mc_cmd->mc_cnt = num_addrs * 6;
792 for (i = 0; i < num_addrs; i++) {
793 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
794 dmi = dmi->next;
795 }
796 p->scb->cbl_offset = make16(mc_cmd);
797 p->scb->cmd = CUC_START;
798 elmc_id_attn586();
799 s = jiffies;
800 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
ff5688ae 801 if (time_after(jiffies, s + 30*HZ/100))
1da177e4
LT		 802 break;
803 }
804 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
805 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
806 }
807 }
808 }
809 /*
810 * alloc xmit-buffs / init xmit_cmds
811 */
812 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
813 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
814 ptr = (char *) ptr + XMIT_BUFF_SIZE;
815 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
816 ptr = (char *) ptr + sizeof(struct tbd_struct);
817 if ((void *) ptr > (void *) p->iscp) {
818 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
819 return 1;
820 }
821 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
822 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
823 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
824 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
825 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
826 p->xmit_buffs[i]->next = 0xffff;
827 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
828 }
829
830 p->xmit_count = 0;
831 p->xmit_last = 0;
832#ifndef NO_NOPCOMMANDS
833 p->nop_point = 0;
834#endif
835
836 /*
837 * 'start transmitter' (nop-loop)
838 */
839#ifndef NO_NOPCOMMANDS
840 p->scb->cbl_offset = make16(p->nop_cmds[0]);
841 p->scb->cmd = CUC_START;
842 elmc_id_attn586();
843 WAIT_4_SCB_CMD();
844#else
845 p->xmit_cmds[0]->cmd_link = 0xffff;
846 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
847#endif
848
849 return 0;
850}
851
852/******************************************************
853 * This is a helper routine for elmc_rnr_int() and init586().
854 * It sets up the Receive Frame Area (RFA).
855 */
856
857static void *alloc_rfa(struct net_device *dev, void *ptr)
858{
859 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
860 volatile struct rbd_struct *rbd;
861 int i;
862 struct priv *p = (struct priv *) dev->priv;
863
864 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
865 p->rfd_first = rfd;
866
867 for (i = 0; i < p->num_recv_buffs; i++) {
868 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
869 }
870 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
871
872 ptr = (void *) (rfd + p->num_recv_buffs);
873
874 rbd = (struct rbd_struct *) ptr;
875 ptr = (void *) (rbd + p->num_recv_buffs);
876
877 /* clr descriptors */
878 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
879
880 for (i = 0; i < p->num_recv_buffs; i++) {
881 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
882 rbd[i].size = RECV_BUFF_SIZE;
883 rbd[i].buffer = make24(ptr);
884 ptr = (char *) ptr + RECV_BUFF_SIZE;
885 }
886
887 p->rfd_top = p->rfd_first;
888 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
889
890 p->scb->rfa_offset = make16(p->rfd_first);
891 p->rfd_first->rbd_offset = make16(rbd);
892
893 return ptr;
894}
895
896
897/**************************************************
898 * Interrupt Handler ...
899 */
900
901static irqreturn_t
7d12e780 902elmc_interrupt(int irq, void *dev_id)
1da177e4 903{
c31f28e7 904 struct net_device *dev = dev_id;
1da177e4
LT		 905 unsigned short stat;
906 struct priv *p;
907
c31f28e7 908 if (!netif_running(dev)) {
1da177e4
LT		 909 /* The 3c523 has this habit of generating interrupts during the
910 reset. I'm not sure if the ni52 has this same problem, but it's
911 really annoying if we haven't finished initializing it. I was
912 hoping all the elmc_id_* commands would disable this, but I
913 might have missed a few. */
914
915 elmc_id_attn586(); /* ack inter. and disable any more */
916 return IRQ_HANDLED;
917 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
918 /* wasn't this device */
919 return IRQ_NONE;
920 }
921 /* reading ELMC_CTRL also clears the INT bit. */
922
923 p = (struct priv *) dev->priv;
924
6aa20a22 925 while ((stat = p->scb->status & STAT_MASK))
1da177e4
LT		 926 {
927 p->scb->cmd = stat;
928 elmc_attn586(); /* ack inter. */
929
930 if (stat & STAT_CX) {
931 /* command with I-bit set complete */
932 elmc_xmt_int(dev);
933 }
934 if (stat & STAT_FR) {
935 /* received a frame */
936 elmc_rcv_int(dev);
937 }
938#ifndef NO_NOPCOMMANDS
939 if (stat & STAT_CNA) {
940 /* CU went 'not ready' */
941 if (netif_running(dev)) {
942 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
943 }
944 }
945#endif
946
947 if (stat & STAT_RNR) {
948 /* RU went 'not ready' */
949
950 if (p->scb->status & RU_SUSPEND) {
951 /* special case: RU_SUSPEND */
952
953 WAIT_4_SCB_CMD();
954 p->scb->cmd = RUC_RESUME;
955 elmc_attn586();
956 } else {
957 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
958 elmc_rnr_int(dev);
959 }
960 }
961 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
962 if (p->scb->cmd) { /* timed out? */
963 break;
964 }
965 }
966 return IRQ_HANDLED;
967}
968
969/*******************************************************
970 * receive-interrupt
971 */
972
973static void elmc_rcv_int(struct net_device *dev)
974{
975 int status;
976 unsigned short totlen;
977 struct sk_buff *skb;
978 struct rbd_struct *rbd;
979 struct priv *p = (struct priv *) dev->priv;
980
981 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
982 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
983
984 if (status & STAT_OK) { /* frame received without error? */
985 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
986 totlen &= RBD_MASK; /* length of this frame */
987 rbd->status = 0;
988 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
989 if (skb != NULL) {
1da177e4
LT		 990 skb_reserve(skb, 2); /* 16 byte alignment */
991 skb_put(skb,totlen);
8c7b7faa 992 skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
1da177e4
LT		 993 skb->protocol = eth_type_trans(skb, dev);
994 netif_rx(skb);
995 dev->last_rx = jiffies;
996 p->stats.rx_packets++;
997 p->stats.rx_bytes += totlen;
998 } else {
999 p->stats.rx_dropped++;
1000 }
1001 } else {
1002 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1003 p->stats.rx_dropped++;
1004 }
1005 } else { /* frame !(ok), only with 'save-bad-frames' */
1006 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1007 p->stats.rx_errors++;
1008 }
1009 p->rfd_top->status = 0;
1010 p->rfd_top->last = RFD_SUSP;
1011 p->rfd_last->last = 0; /* delete RU_SUSP */
1012 p->rfd_last = p->rfd_top;
1013 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1014 }
1015}
1016
1017/**********************************************************
1018 * handle 'Receiver went not ready'.
1019 */
1020
1021static void elmc_rnr_int(struct net_device *dev)
1022{
1023 struct priv *p = (struct priv *) dev->priv;
1024
1025 p->stats.rx_errors++;
1026
1027 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1028 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1029 elmc_attn586();
1030 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1031
1032 alloc_rfa(dev, (char *) p->rfd_first);
1033 startrecv586(dev); /* restart RU */
1034
1035 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1036
1037}
1038
1039/**********************************************************
1040 * handle xmit - interrupt
1041 */
1042
1043static void elmc_xmt_int(struct net_device *dev)
1044{
1045 int status;
1046 struct priv *p = (struct priv *) dev->priv;
1047
1048 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1049 if (!(status & STAT_COMPL)) {
1050 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1051 }
1052 if (status & STAT_OK) {
1053 p->stats.tx_packets++;
1054 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1055 } else {
1056 p->stats.tx_errors++;
1057 if (status & TCMD_LATECOLL) {
1058 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1059 p->stats.collisions++;
1060 } else if (status & TCMD_NOCARRIER) {
1061 p->stats.tx_carrier_errors++;
1062 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1063 } else if (status & TCMD_LOSTCTS) {
1064 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1065 } else if (status & TCMD_UNDERRUN) {
1066 p->stats.tx_fifo_errors++;
1067 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1068 } else if (status & TCMD_MAXCOLL) {
1069 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1070 p->stats.collisions += 16;
1071 }
1072 }
1073
1074#if (NUM_XMIT_BUFFS != 1)
1075 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1076 p->xmit_last = 0;
1077 }
1078#endif
1079
1080 netif_wake_queue(dev);
1081}
1082
1083/***********************************************************
1084 * (re)start the receiver
1085 */
1086
1087static void startrecv586(struct net_device *dev)
1088{
1089 struct priv *p = (struct priv *) dev->priv;
1090
1091 p->scb->rfa_offset = make16(p->rfd_first);
1092 p->scb->cmd = RUC_START;
1093 elmc_attn586(); /* start cmd. */
1094 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1095}
1096
1097/******************************************************
1098 * timeout
1099 */
6aa20a22 1100
1da177e4
LT		 1101static void elmc_timeout(struct net_device *dev)
1102{
1103 struct priv *p = (struct priv *) dev->priv;
1104 /* COMMAND-UNIT active? */
1105 if (p->scb->status & CU_ACTIVE) {
1106#ifdef DEBUG
1107 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1108 printk("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name, (int) p->xmit_cmds[0]->cmd_status, (int) p->nop_cmds[0]->cmd_status, (int) p->nop_cmds[1]->cmd_status, (int) p->nop_point);
1109#endif
1110 p->scb->cmd = CUC_ABORT;
1111 elmc_attn586();
1112 WAIT_4_SCB_CMD();
1113 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1114 p->scb->cmd = CUC_START;
1115 elmc_attn586();
1116 WAIT_4_SCB_CMD();
1117 netif_wake_queue(dev);
1118 } else {
1119#ifdef DEBUG
1120 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1121 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1122#endif
1123 elmc_close(dev);
1124 elmc_open(dev);
1125 }
1126}
6aa20a22 1127
1da177e4
LT		 1128/******************************************************
1129 * send frame
1130 */
1131
1132static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1133{
1134 int len;
1135 int i;
1136#ifndef NO_NOPCOMMANDS
1137 int next_nop;
1138#endif
1139 struct priv *p = (struct priv *) dev->priv;
1140
1141 netif_stop_queue(dev);
1142
1143 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
6aa20a22 1144
1da177e4
LT		 1145 if (len != skb->len)
1146 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
3dbad80a 1147 skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
1da177e4
LT		 1148
1149#if (NUM_XMIT_BUFFS == 1)
1150#ifdef NO_NOPCOMMANDS
1151 p->xmit_buffs[0]->size = TBD_LAST | len;
1152 for (i = 0; i < 16; i++) {
1153 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1154 p->scb->cmd = CUC_START;
1155 p->xmit_cmds[0]->cmd_status = 0;
1156 elmc_attn586();
1157 dev->trans_start = jiffies;
1158 if (!i) {
1159 dev_kfree_skb(skb);
1160 }
1161 WAIT_4_SCB_CMD();
1162 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1163 break;
1164 }
1165 if (p->xmit_cmds[0]->cmd_status) {
1166 break;
1167 }
1168 if (i == 15) {
1169 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1170 }
1171 }
1172#else
1173 next_nop = (p->nop_point + 1) & 0x1;
1174 p->xmit_buffs[0]->size = TBD_LAST | len;
6aa20a22 1175
1da177e4
LT		 1176 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1177 = make16((p->nop_cmds[next_nop]));
1178 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1179
1180 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1181 dev->trans_start = jiffies;
1182 p->nop_point = next_nop;
1183 dev_kfree_skb(skb);
1184#endif
1185#else
1186 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1187 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1188 next_nop = 0;
1189 }
1190 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1191 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1192 = make16((p->nop_cmds[next_nop]));
1193 p->nop_cmds[next_nop]->cmd_status = 0;
1194 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1195 dev->trans_start = jiffies;
1196 p->xmit_count = next_nop;
1197 if (p->xmit_count != p->xmit_last)
1198 netif_wake_queue(dev);
1199 dev_kfree_skb(skb);
1200#endif
1201 return 0;
1202}
1203
1204/*******************************************
1205 * Someone wanna have the statistics
1206 */
1207
1208static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1209{
1210 struct priv *p = (struct priv *) dev->priv;
1211 unsigned short crc, aln, rsc, ovrn;
1212
1213 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1214 p->scb->crc_errs -= crc;
1215 aln = p->scb->aln_errs;
1216 p->scb->aln_errs -= aln;
1217 rsc = p->scb->rsc_errs;
1218 p->scb->rsc_errs -= rsc;
1219 ovrn = p->scb->ovrn_errs;
1220 p->scb->ovrn_errs -= ovrn;
1221
1222 p->stats.rx_crc_errors += crc;
1223 p->stats.rx_fifo_errors += ovrn;
1224 p->stats.rx_frame_errors += aln;
1225 p->stats.rx_dropped += rsc;
1226
1227 return &p->stats;
1228}
1229
1230/********************************************************
1231 * Set MC list ..
1232 */
1233
1234#ifdef ELMC_MULTICAST
1235static void set_multicast_list(struct net_device *dev)
1236{
1237 if (!dev->start) {
1238 /* without a running interface, promiscuous doesn't work */
1239 return;
1240 }
1241 dev->start = 0;
1242 alloc586(dev);
1243 init586(dev);
1244 startrecv586(dev);
1245 dev->start = 1;
1246}
1247#endif
1248
1249static void netdev_get_drvinfo(struct net_device *dev,
1250 struct ethtool_drvinfo *info)
1251{
1252 strcpy(info->driver, DRV_NAME);
1253 strcpy(info->version, DRV_VERSION);
1254 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1255}
1256
7282d491 1257static const struct ethtool_ops netdev_ethtool_ops = {
1da177e4
LT		 1258 .get_drvinfo = netdev_get_drvinfo,
1259};
1260
1261#ifdef MODULE
1262
1263/* Increase if needed ;) */
1264#define MAX_3C523_CARDS 4
1265
1266static struct net_device *dev_elmc[MAX_3C523_CARDS];
1267static int irq[MAX_3C523_CARDS];
1268static int io[MAX_3C523_CARDS];
1269module_param_array(irq, int, NULL, 0);
1270module_param_array(io, int, NULL, 0);
1271MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1272MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
7b24017e 1273MODULE_LICENSE("GPL");
1da177e4 1274
96e672c7 1275int __init init_module(void)
1da177e4
LT		 1276{
1277 int this_dev,found = 0;
1278
6aa20a22 1279 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1da177e4
LT		 1280 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1281 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1282 if (!dev)
1283 break;
1284 dev->irq=irq[this_dev];
1285 dev->base_addr=io[this_dev];
1286 if (do_elmc_probe(dev) == 0) {
b1fc5505 1287 dev_elmc[this_dev] = dev;
1288 found++;
1289 continue;
1da177e4
LT		 1290 }
1291 free_netdev(dev);
1292 if (io[this_dev]==0)
1293 break;
1294 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1295 }
1296
1297 if(found==0) {
1298 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1299 return -ENXIO;
1300 } else return 0;
1301}
1302
afc8eb46 1303void __exit cleanup_module(void)
1da177e4
LT		 1304{
1305 int this_dev;
1306 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1307 struct net_device *dev = dev_elmc[this_dev];
1308 if (dev) {
1309 unregister_netdev(dev);
1310 cleanup_card(dev);
1311 free_netdev(dev);
1312 }
1313 }
1314}
1315
1316#endif /* MODULE */
Linux 6.x block layer and io_uring tree(s)