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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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)
Jeff Garzik6aa20a22006-09-13 13:24:59 -040086
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 $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>
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800108#include <linux/jiffies.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
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
David Howells7d12e782006-10-05 14:55:46 +0100183static irqreturn_t elmc_interrupt(int irq, void *dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184static 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
Jeff Garzik7282d492006-09-13 14:30:00 -0400192static const struct ethtool_ops netdev_ethtool_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
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
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700292 ret = request_irq(dev->irq, &elmc_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 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
426 SET_MODULE_OWNER(dev);
427 if (MCA_bus == 0) {
428 return -ENODEV;
429 }
430 /* search through the slots for the 3c523. */
431 slot = mca_find_adapter(ELMC_MCA_ID, 0);
432 while (slot != -1) {
433 status = mca_read_stored_pos(slot, 2);
434
435 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
436 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 /*
439 If we're trying to match a specified irq or IO address,
440 we'll reject a match unless it's what we're looking for.
441 Also reject it if the card is already in use.
442 */
443
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400444 if ((irq && irq != dev->irq) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 (base_addr && base_addr != dev->base_addr)) {
446 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
447 continue;
448 }
449 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
450 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
451 continue;
452 }
453
454 /* found what we're looking for... */
455 break;
456 }
457
458 /* we didn't find any 3c523 in the slots we checked for */
459 if (slot == MCA_NOTFOUND)
460 return ((base_addr || irq) ? -ENXIO : -ENODEV);
461
462 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
463 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
464
465 /* if we get this far, adapter has been found - carry on */
466 printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
467
468 /* Now we extract configuration info from the card.
469 The 3c523 provides information in two of the POS registers, but
470 the second one is only needed if we want to tell the card what IRQ
471 to use. I suspect that whoever sets the thing up initially would
472 prefer we don't screw with those things.
473
474 Note that we read the status info when we found the card...
475
476 See 3c523.h for more details.
477 */
478
479 /* revision is stored in the first 4 bits of the revision register */
480 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
481
482 /* according to docs, we read the interrupt and write it back to
483 the IRQ select register, since the POST might not configure the IRQ
484 properly. */
485 switch (dev->irq) {
486 case 3:
487 mca_write_pos(slot, 3, 0x04);
488 break;
489 case 7:
490 mca_write_pos(slot, 3, 0x02);
491 break;
492 case 9:
493 mca_write_pos(slot, 3, 0x08);
494 break;
495 case 12:
496 mca_write_pos(slot, 3, 0x01);
497 break;
498 }
499
500 memset(pr, 0, sizeof(struct priv));
501 pr->slot = slot;
502
503 printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
504 dev->base_addr);
505
506 /* Determine if we're using the on-board transceiver (i.e. coax) or
507 an external one. The information is pretty much useless, but I
508 guess it's worth brownie points. */
509 dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
510
511 /* The 3c523 has a 24K chunk of memory. The first 16K is the
512 shared memory, while the last 8K is for the EtherStart BIOS ROM.
513 Which we don't care much about here. We'll just tell Linux that
514 we're using 16K. MCA won't permit address space conflicts caused
515 by not mapping the other 8K. */
516 dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
517
518 /* We're using MCA, so it's a given that the information about memory
519 size is correct. The Crynwr drivers do something like this. */
520
521 elmc_id_reset586(); /* seems like a good idea before checking it... */
522
523 size = 0x4000; /* check for 16K mem */
524 if (!check586(dev, dev->mem_start, size)) {
525 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
526 dev->mem_start);
527 retval = -ENODEV;
528 goto err_out;
529 }
530 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
531
532 pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
533 pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
534 alloc586(dev);
535
536 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
537
538 /* set number of receive-buffs according to memsize */
539 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
540
541 /* dump all the assorted information */
542 printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400543 dev->irq, dev->if_port ? "ex" : "in",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 dev->mem_start, dev->mem_end - 1);
545
546 /* The hardware address for the 3c523 is stored in the first six
547 bytes of the IO address. */
548 printk(KERN_INFO "%s: hardware address ", dev->name);
549 for (i = 0; i < 6; i++) {
550 dev->dev_addr[i] = inb(dev->base_addr + i);
551 printk(" %02x", dev->dev_addr[i]);
552 }
553 printk("\n");
554
555 dev->open = &elmc_open;
556 dev->stop = &elmc_close;
557 dev->get_stats = &elmc_get_stats;
558 dev->hard_start_xmit = &elmc_send_packet;
559 dev->tx_timeout = &elmc_timeout;
560 dev->watchdog_timeo = HZ;
561#ifdef ELMC_MULTICAST
562 dev->set_multicast_list = &set_multicast_list;
563#else
564 dev->set_multicast_list = NULL;
565#endif
566 dev->ethtool_ops = &netdev_ethtool_ops;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 /* note that we haven't actually requested the IRQ from the kernel.
569 That gets done in elmc_open(). I'm not sure that's such a good idea,
570 but it works, so I'll go with it. */
571
572#ifndef ELMC_MULTICAST
573 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
574#endif
575
b1fc5502005-05-12 20:11:55 -0400576 retval = register_netdev(dev);
577 if (retval)
578 goto err_out;
579
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 return 0;
581err_out:
582 mca_set_adapter_procfn(slot, NULL, NULL);
583 release_region(dev->base_addr, ELMC_IO_EXTENT);
584 return retval;
585}
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400586
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587static void cleanup_card(struct net_device *dev)
588{
589 mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
590 release_region(dev->base_addr, ELMC_IO_EXTENT);
591}
592
593#ifndef MODULE
594struct net_device * __init elmc_probe(int unit)
595{
596 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
597 int err;
598
599 if (!dev)
600 return ERR_PTR(-ENOMEM);
601
602 sprintf(dev->name, "eth%d", unit);
603 netdev_boot_setup_check(dev);
604
605 err = do_elmc_probe(dev);
606 if (err)
607 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609out:
610 free_netdev(dev);
611 return ERR_PTR(err);
612}
613#endif
614
615/**********************************************
616 * init the chip (elmc-interrupt should be disabled?!)
617 * needs a correct 'allocated' memory
618 */
619
620static int init586(struct net_device *dev)
621{
622 void *ptr;
623 unsigned long s;
624 int i, result = 0;
625 struct priv *p = (struct priv *) dev->priv;
626 volatile struct configure_cmd_struct *cfg_cmd;
627 volatile struct iasetup_cmd_struct *ias_cmd;
628 volatile struct tdr_cmd_struct *tdr_cmd;
629 volatile struct mcsetup_cmd_struct *mc_cmd;
630 struct dev_mc_list *dmi = dev->mc_list;
631 int num_addrs = dev->mc_count;
632
633 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
634
635 cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
636 cfg_cmd->cmd_status = 0;
637 cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
638 cfg_cmd->cmd_link = 0xffff;
639
640 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
641 cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
642 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
643 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
644 cfg_cmd->priority = 0x00;
645 cfg_cmd->ifs = 0x60;
646 cfg_cmd->time_low = 0x00;
647 cfg_cmd->time_high = 0xf2;
648 cfg_cmd->promisc = 0;
649 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC)) {
650 cfg_cmd->promisc = 1;
651 dev->flags |= IFF_PROMISC;
652 }
653 cfg_cmd->carr_coll = 0x00;
654
655 p->scb->cbl_offset = make16(cfg_cmd);
656
657 p->scb->cmd = CUC_START; /* cmd.-unit start */
658 elmc_id_attn586();
659
660 s = jiffies; /* warning: only active with interrupts on !! */
661 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800662 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 break;
664 }
665
666 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
667 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
668 return 1;
669 }
670 /*
671 * individual address setup
672 */
673 ias_cmd = (struct iasetup_cmd_struct *) ptr;
674
675 ias_cmd->cmd_status = 0;
676 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
677 ias_cmd->cmd_link = 0xffff;
678
679 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
680
681 p->scb->cbl_offset = make16(ias_cmd);
682
683 p->scb->cmd = CUC_START; /* cmd.-unit start */
684 elmc_id_attn586();
685
686 s = jiffies;
687 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800688 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689 break;
690 }
691
692 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
693 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
694 return 1;
695 }
696 /*
697 * TDR, wire check .. e.g. no resistor e.t.c
698 */
699 tdr_cmd = (struct tdr_cmd_struct *) ptr;
700
701 tdr_cmd->cmd_status = 0;
702 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
703 tdr_cmd->cmd_link = 0xffff;
704 tdr_cmd->status = 0;
705
706 p->scb->cbl_offset = make16(tdr_cmd);
707
708 p->scb->cmd = CUC_START; /* cmd.-unit start */
709 elmc_attn586();
710
711 s = jiffies;
712 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800713 if (time_after(jiffies, s + 30*HZ/100)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
715 result = 1;
716 break;
717 }
718 }
719
720 if (!result) {
721 DELAY(2); /* wait for result */
722 result = tdr_cmd->status;
723
724 p->scb->cmd = p->scb->status & STAT_MASK;
725 elmc_id_attn586(); /* ack the interrupts */
726
727 if (result & TDR_LNK_OK) {
728 /* empty */
729 } else if (result & TDR_XCVR_PRB) {
730 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
731 } else if (result & TDR_ET_OPN) {
732 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
733 } else if (result & TDR_ET_SRT) {
734 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
735 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
736 } else {
737 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
738 }
739 }
740 /*
741 * ack interrupts
742 */
743 p->scb->cmd = p->scb->status & STAT_MASK;
744 elmc_id_attn586();
745
746 /*
747 * alloc nop/xmit-cmds
748 */
749#if (NUM_XMIT_BUFFS == 1)
750 for (i = 0; i < 2; i++) {
751 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
752 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
753 p->nop_cmds[i]->cmd_status = 0;
754 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
755 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
756 }
757 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
758 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
759#else
760 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
761 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
762 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
763 p->nop_cmds[i]->cmd_status = 0;
764 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
765 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
766 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
767 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
768 }
769#endif
770
771 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
772
773 /*
774 * Multicast setup
775 */
776
777 if (dev->mc_count) {
778 /* I don't understand this: do we really need memory after the init? */
779 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
780 if (len <= 0) {
781 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
782 } else {
783 if (len < num_addrs) {
784 num_addrs = len;
785 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
786 dev->name, num_addrs);
787 }
788 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
789 mc_cmd->cmd_status = 0;
790 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
791 mc_cmd->cmd_link = 0xffff;
792 mc_cmd->mc_cnt = num_addrs * 6;
793 for (i = 0; i < num_addrs; i++) {
794 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
795 dmi = dmi->next;
796 }
797 p->scb->cbl_offset = make16(mc_cmd);
798 p->scb->cmd = CUC_START;
799 elmc_id_attn586();
800 s = jiffies;
801 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800802 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 break;
804 }
805 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
806 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
807 }
808 }
809 }
810 /*
811 * alloc xmit-buffs / init xmit_cmds
812 */
813 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
814 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
815 ptr = (char *) ptr + XMIT_BUFF_SIZE;
816 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
817 ptr = (char *) ptr + sizeof(struct tbd_struct);
818 if ((void *) ptr > (void *) p->iscp) {
819 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
820 return 1;
821 }
822 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
823 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
824 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
825 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
826 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
827 p->xmit_buffs[i]->next = 0xffff;
828 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
829 }
830
831 p->xmit_count = 0;
832 p->xmit_last = 0;
833#ifndef NO_NOPCOMMANDS
834 p->nop_point = 0;
835#endif
836
837 /*
838 * 'start transmitter' (nop-loop)
839 */
840#ifndef NO_NOPCOMMANDS
841 p->scb->cbl_offset = make16(p->nop_cmds[0]);
842 p->scb->cmd = CUC_START;
843 elmc_id_attn586();
844 WAIT_4_SCB_CMD();
845#else
846 p->xmit_cmds[0]->cmd_link = 0xffff;
847 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
848#endif
849
850 return 0;
851}
852
853/******************************************************
854 * This is a helper routine for elmc_rnr_int() and init586().
855 * It sets up the Receive Frame Area (RFA).
856 */
857
858static void *alloc_rfa(struct net_device *dev, void *ptr)
859{
860 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
861 volatile struct rbd_struct *rbd;
862 int i;
863 struct priv *p = (struct priv *) dev->priv;
864
865 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
866 p->rfd_first = rfd;
867
868 for (i = 0; i < p->num_recv_buffs; i++) {
869 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
870 }
871 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
872
873 ptr = (void *) (rfd + p->num_recv_buffs);
874
875 rbd = (struct rbd_struct *) ptr;
876 ptr = (void *) (rbd + p->num_recv_buffs);
877
878 /* clr descriptors */
879 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
880
881 for (i = 0; i < p->num_recv_buffs; i++) {
882 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
883 rbd[i].size = RECV_BUFF_SIZE;
884 rbd[i].buffer = make24(ptr);
885 ptr = (char *) ptr + RECV_BUFF_SIZE;
886 }
887
888 p->rfd_top = p->rfd_first;
889 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
890
891 p->scb->rfa_offset = make16(p->rfd_first);
892 p->rfd_first->rbd_offset = make16(rbd);
893
894 return ptr;
895}
896
897
898/**************************************************
899 * Interrupt Handler ...
900 */
901
902static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +0100903elmc_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700904{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400905 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 unsigned short stat;
907 struct priv *p;
908
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400909 if (!netif_running(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910 /* The 3c523 has this habit of generating interrupts during the
911 reset. I'm not sure if the ni52 has this same problem, but it's
912 really annoying if we haven't finished initializing it. I was
913 hoping all the elmc_id_* commands would disable this, but I
914 might have missed a few. */
915
916 elmc_id_attn586(); /* ack inter. and disable any more */
917 return IRQ_HANDLED;
918 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
919 /* wasn't this device */
920 return IRQ_NONE;
921 }
922 /* reading ELMC_CTRL also clears the INT bit. */
923
924 p = (struct priv *) dev->priv;
925
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400926 while ((stat = p->scb->status & STAT_MASK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700927 {
928 p->scb->cmd = stat;
929 elmc_attn586(); /* ack inter. */
930
931 if (stat & STAT_CX) {
932 /* command with I-bit set complete */
933 elmc_xmt_int(dev);
934 }
935 if (stat & STAT_FR) {
936 /* received a frame */
937 elmc_rcv_int(dev);
938 }
939#ifndef NO_NOPCOMMANDS
940 if (stat & STAT_CNA) {
941 /* CU went 'not ready' */
942 if (netif_running(dev)) {
943 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
944 }
945 }
946#endif
947
948 if (stat & STAT_RNR) {
949 /* RU went 'not ready' */
950
951 if (p->scb->status & RU_SUSPEND) {
952 /* special case: RU_SUSPEND */
953
954 WAIT_4_SCB_CMD();
955 p->scb->cmd = RUC_RESUME;
956 elmc_attn586();
957 } else {
958 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
959 elmc_rnr_int(dev);
960 }
961 }
962 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
963 if (p->scb->cmd) { /* timed out? */
964 break;
965 }
966 }
967 return IRQ_HANDLED;
968}
969
970/*******************************************************
971 * receive-interrupt
972 */
973
974static void elmc_rcv_int(struct net_device *dev)
975{
976 int status;
977 unsigned short totlen;
978 struct sk_buff *skb;
979 struct rbd_struct *rbd;
980 struct priv *p = (struct priv *) dev->priv;
981
982 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
983 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
984
985 if (status & STAT_OK) { /* frame received without error? */
986 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
987 totlen &= RBD_MASK; /* length of this frame */
988 rbd->status = 0;
989 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
990 if (skb != NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 skb_reserve(skb, 2); /* 16 byte alignment */
992 skb_put(skb,totlen);
David S. Miller8c7b7fa2007-07-10 22:08:12 -0700993 skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 skb->protocol = eth_type_trans(skb, dev);
995 netif_rx(skb);
996 dev->last_rx = jiffies;
997 p->stats.rx_packets++;
998 p->stats.rx_bytes += totlen;
999 } else {
1000 p->stats.rx_dropped++;
1001 }
1002 } else {
1003 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1004 p->stats.rx_dropped++;
1005 }
1006 } else { /* frame !(ok), only with 'save-bad-frames' */
1007 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1008 p->stats.rx_errors++;
1009 }
1010 p->rfd_top->status = 0;
1011 p->rfd_top->last = RFD_SUSP;
1012 p->rfd_last->last = 0; /* delete RU_SUSP */
1013 p->rfd_last = p->rfd_top;
1014 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1015 }
1016}
1017
1018/**********************************************************
1019 * handle 'Receiver went not ready'.
1020 */
1021
1022static void elmc_rnr_int(struct net_device *dev)
1023{
1024 struct priv *p = (struct priv *) dev->priv;
1025
1026 p->stats.rx_errors++;
1027
1028 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1029 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1030 elmc_attn586();
1031 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1032
1033 alloc_rfa(dev, (char *) p->rfd_first);
1034 startrecv586(dev); /* restart RU */
1035
1036 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1037
1038}
1039
1040/**********************************************************
1041 * handle xmit - interrupt
1042 */
1043
1044static void elmc_xmt_int(struct net_device *dev)
1045{
1046 int status;
1047 struct priv *p = (struct priv *) dev->priv;
1048
1049 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1050 if (!(status & STAT_COMPL)) {
1051 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1052 }
1053 if (status & STAT_OK) {
1054 p->stats.tx_packets++;
1055 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1056 } else {
1057 p->stats.tx_errors++;
1058 if (status & TCMD_LATECOLL) {
1059 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1060 p->stats.collisions++;
1061 } else if (status & TCMD_NOCARRIER) {
1062 p->stats.tx_carrier_errors++;
1063 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1064 } else if (status & TCMD_LOSTCTS) {
1065 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1066 } else if (status & TCMD_UNDERRUN) {
1067 p->stats.tx_fifo_errors++;
1068 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1069 } else if (status & TCMD_MAXCOLL) {
1070 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1071 p->stats.collisions += 16;
1072 }
1073 }
1074
1075#if (NUM_XMIT_BUFFS != 1)
1076 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1077 p->xmit_last = 0;
1078 }
1079#endif
1080
1081 netif_wake_queue(dev);
1082}
1083
1084/***********************************************************
1085 * (re)start the receiver
1086 */
1087
1088static void startrecv586(struct net_device *dev)
1089{
1090 struct priv *p = (struct priv *) dev->priv;
1091
1092 p->scb->rfa_offset = make16(p->rfd_first);
1093 p->scb->cmd = RUC_START;
1094 elmc_attn586(); /* start cmd. */
1095 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1096}
1097
1098/******************************************************
1099 * timeout
1100 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001101
Linus Torvalds1da177e2005-04-16 15:20:36 -07001102static void elmc_timeout(struct net_device *dev)
1103{
1104 struct priv *p = (struct priv *) dev->priv;
1105 /* COMMAND-UNIT active? */
1106 if (p->scb->status & CU_ACTIVE) {
1107#ifdef DEBUG
1108 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1109 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);
1110#endif
1111 p->scb->cmd = CUC_ABORT;
1112 elmc_attn586();
1113 WAIT_4_SCB_CMD();
1114 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1115 p->scb->cmd = CUC_START;
1116 elmc_attn586();
1117 WAIT_4_SCB_CMD();
1118 netif_wake_queue(dev);
1119 } else {
1120#ifdef DEBUG
1121 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1122 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1123#endif
1124 elmc_close(dev);
1125 elmc_open(dev);
1126 }
1127}
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001128
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129/******************************************************
1130 * send frame
1131 */
1132
1133static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1134{
1135 int len;
1136 int i;
1137#ifndef NO_NOPCOMMANDS
1138 int next_nop;
1139#endif
1140 struct priv *p = (struct priv *) dev->priv;
1141
1142 netif_stop_queue(dev);
1143
1144 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001145
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146 if (len != skb->len)
1147 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
David S. Miller3dbad802007-03-29 19:16:03 -07001148 skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001149
1150#if (NUM_XMIT_BUFFS == 1)
1151#ifdef NO_NOPCOMMANDS
1152 p->xmit_buffs[0]->size = TBD_LAST | len;
1153 for (i = 0; i < 16; i++) {
1154 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1155 p->scb->cmd = CUC_START;
1156 p->xmit_cmds[0]->cmd_status = 0;
1157 elmc_attn586();
1158 dev->trans_start = jiffies;
1159 if (!i) {
1160 dev_kfree_skb(skb);
1161 }
1162 WAIT_4_SCB_CMD();
1163 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1164 break;
1165 }
1166 if (p->xmit_cmds[0]->cmd_status) {
1167 break;
1168 }
1169 if (i == 15) {
1170 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1171 }
1172 }
1173#else
1174 next_nop = (p->nop_point + 1) & 0x1;
1175 p->xmit_buffs[0]->size = TBD_LAST | len;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001176
Linus Torvalds1da177e2005-04-16 15:20:36 -07001177 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1178 = make16((p->nop_cmds[next_nop]));
1179 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1180
1181 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1182 dev->trans_start = jiffies;
1183 p->nop_point = next_nop;
1184 dev_kfree_skb(skb);
1185#endif
1186#else
1187 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1188 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1189 next_nop = 0;
1190 }
1191 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1192 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1193 = make16((p->nop_cmds[next_nop]));
1194 p->nop_cmds[next_nop]->cmd_status = 0;
1195 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1196 dev->trans_start = jiffies;
1197 p->xmit_count = next_nop;
1198 if (p->xmit_count != p->xmit_last)
1199 netif_wake_queue(dev);
1200 dev_kfree_skb(skb);
1201#endif
1202 return 0;
1203}
1204
1205/*******************************************
1206 * Someone wanna have the statistics
1207 */
1208
1209static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1210{
1211 struct priv *p = (struct priv *) dev->priv;
1212 unsigned short crc, aln, rsc, ovrn;
1213
1214 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1215 p->scb->crc_errs -= crc;
1216 aln = p->scb->aln_errs;
1217 p->scb->aln_errs -= aln;
1218 rsc = p->scb->rsc_errs;
1219 p->scb->rsc_errs -= rsc;
1220 ovrn = p->scb->ovrn_errs;
1221 p->scb->ovrn_errs -= ovrn;
1222
1223 p->stats.rx_crc_errors += crc;
1224 p->stats.rx_fifo_errors += ovrn;
1225 p->stats.rx_frame_errors += aln;
1226 p->stats.rx_dropped += rsc;
1227
1228 return &p->stats;
1229}
1230
1231/********************************************************
1232 * Set MC list ..
1233 */
1234
1235#ifdef ELMC_MULTICAST
1236static void set_multicast_list(struct net_device *dev)
1237{
1238 if (!dev->start) {
1239 /* without a running interface, promiscuous doesn't work */
1240 return;
1241 }
1242 dev->start = 0;
1243 alloc586(dev);
1244 init586(dev);
1245 startrecv586(dev);
1246 dev->start = 1;
1247}
1248#endif
1249
1250static void netdev_get_drvinfo(struct net_device *dev,
1251 struct ethtool_drvinfo *info)
1252{
1253 strcpy(info->driver, DRV_NAME);
1254 strcpy(info->version, DRV_VERSION);
1255 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1256}
1257
Jeff Garzik7282d492006-09-13 14:30:00 -04001258static const struct ethtool_ops netdev_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 .get_drvinfo = netdev_get_drvinfo,
1260};
1261
1262#ifdef MODULE
1263
1264/* Increase if needed ;) */
1265#define MAX_3C523_CARDS 4
1266
1267static struct net_device *dev_elmc[MAX_3C523_CARDS];
1268static int irq[MAX_3C523_CARDS];
1269static int io[MAX_3C523_CARDS];
1270module_param_array(irq, int, NULL, 0);
1271module_param_array(io, int, NULL, 0);
1272MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1273MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
Randy Dunlap7b240172005-06-13 12:31:53 -07001274MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275
Randy Dunlap96e672c2006-06-10 13:33:48 -07001276int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277{
1278 int this_dev,found = 0;
1279
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001280 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1282 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1283 if (!dev)
1284 break;
1285 dev->irq=irq[this_dev];
1286 dev->base_addr=io[this_dev];
1287 if (do_elmc_probe(dev) == 0) {
b1fc5502005-05-12 20:11:55 -04001288 dev_elmc[this_dev] = dev;
1289 found++;
1290 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 }
1292 free_netdev(dev);
1293 if (io[this_dev]==0)
1294 break;
1295 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1296 }
1297
1298 if(found==0) {
1299 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1300 return -ENXIO;
1301 } else return 0;
1302}
1303
Al Viroafc8eb42006-06-14 18:50:53 -04001304void __exit cleanup_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001305{
1306 int this_dev;
1307 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1308 struct net_device *dev = dev_elmc[this_dev];
1309 if (dev) {
1310 unregister_netdev(dev);
1311 cleanup_card(dev);
1312 free_netdev(dev);
1313 }
1314 }
1315}
1316
1317#endif /* MODULE */