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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) { \
Alexander Beregalov39738e12009-05-26 12:35:26 +0000179 pr_warning("%s:%d: scb_cmd timed out .. resetting i82586\n",\
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 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);
Stephen Hemminger27a1de92009-08-31 19:50:54 +0000186static netdev_tx_t elmc_send_packet(struct sk_buff *, struct net_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187static 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 {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 unsigned long base;
206 char *memtop;
207 unsigned long mapped_start; /* Start of ioremap */
208 volatile struct rfd_struct *rfd_last, *rfd_top, *rfd_first;
209 volatile struct scp_struct *scp; /* volatile is important */
210 volatile struct iscp_struct *iscp; /* volatile is important */
211 volatile struct scb_struct *scb; /* volatile is important */
212 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
213#if (NUM_XMIT_BUFFS == 1)
214 volatile struct transmit_cmd_struct *xmit_cmds[2];
215 volatile struct nop_cmd_struct *nop_cmds[2];
216#else
217 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
218 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
219#endif
220 volatile int nop_point, num_recv_buffs;
221 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
222 volatile int xmit_count, xmit_last;
223 volatile int slot;
224};
225
226#define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
227#define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
228
229/* with interrupts disabled - this will clear the interrupt bit in the
230 3c523 control register, and won't put it back. This effectively
231 disables interrupts on the card. */
232#define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);}
233#define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
234
235/*************************************************************************/
236/*
237 Do a Channel Attention on the 3c523. This is extremely board dependent.
238 */
239static void elmc_do_attn586(int ioaddr, int ints)
240{
241 /* the 3c523 requires a minimum of 500 ns. The delays here might be
242 a little too large, and hence they may cut the performance of the
243 card slightly. If someone who knows a little more about Linux
244 timing would care to play with these, I'd appreciate it. */
245
246 /* this bit masking stuff is crap. I'd rather have separate
247 registers with strobe triggers for each of these functions. <sigh>
248 Ya take what ya got. */
249
250 outb(ELMC_CTRL_RST | 0x3 | ELMC_CTRL_CA | ints, ioaddr + ELMC_CTRL);
251 DELAY_16(); /* > 500 ns */
252 outb(ELMC_CTRL_RST | 0x3 | ints, ioaddr + ELMC_CTRL);
253}
254
255/*************************************************************************/
256/*
257 Reset the 82586 on the 3c523. Also very board dependent.
258 */
259static void elmc_do_reset586(int ioaddr, int ints)
260{
261 /* toggle the RST bit low then high */
262 outb(0x3 | ELMC_CTRL_LBK, ioaddr + ELMC_CTRL);
263 DELAY_16(); /* > 500 ns */
264 outb(ELMC_CTRL_RST | ELMC_CTRL_LBK | 0x3, ioaddr + ELMC_CTRL);
265
266 elmc_do_attn586(ioaddr, ints);
267}
268
269/**********************************************
270 * close device
271 */
272
273static int elmc_close(struct net_device *dev)
274{
275 netif_stop_queue(dev);
276 elmc_id_reset586(); /* the hard way to stop the receiver */
277 free_irq(dev->irq, dev);
278 return 0;
279}
280
281/**********************************************
282 * open device
283 */
284
285static int elmc_open(struct net_device *dev)
286{
287 int ret;
288
289 elmc_id_attn586(); /* disable interrupts */
290
Thomas Gleixner1fb9df52006-07-01 19:29:39 -0700291 ret = request_irq(dev->irq, &elmc_interrupt, IRQF_SHARED | IRQF_SAMPLE_RANDOM,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 dev->name, dev);
293 if (ret) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000294 pr_err("%s: couldn't get irq %d\n", dev->name, dev->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 elmc_id_reset586();
296 return ret;
297 }
298 alloc586(dev);
299 init586(dev);
300 startrecv586(dev);
301 netif_start_queue(dev);
302 return 0; /* most done by init */
303}
304
305/**********************************************
306 * Check to see if there's an 82586 out there.
307 */
308
309static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
310{
Wang Chen454d7c92008-11-12 23:37:49 -0800311 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 char *iscp_addrs[2];
313 int i = 0;
314
315 p->base = (unsigned long) isa_bus_to_virt((unsigned long)where) + size - 0x01000000;
316 p->memtop = isa_bus_to_virt((unsigned long)where) + size;
317 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
318 memset((char *) p->scp, 0, sizeof(struct scp_struct));
319 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
320
321 iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
322 iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
323
324 for (i = 0; i < 2; i++) {
325 p->iscp = (struct iscp_struct *) iscp_addrs[i];
326 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
327
328 p->scp->iscp = make24(p->iscp);
329 p->iscp->busy = 1;
330
331 elmc_id_reset586();
332
333 /* reset586 does an implicit CA */
334
335 /* apparently, you sometimes have to kick the 82586 twice... */
336 elmc_id_attn586();
337 DELAY(1);
338
339 if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */
340 return 0;
341 }
342 }
343 return 1;
344}
345
346/******************************************************************
347 * set iscp at the right place, called by elmc_probe and open586.
348 */
349
Hannes Ederdac499f2008-12-25 23:56:45 -0800350static void alloc586(struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351{
Wang Chen454d7c92008-11-12 23:37:49 -0800352 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354 elmc_id_reset586();
355 DELAY(2);
356
357 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
358 p->scb = (struct scb_struct *) isa_bus_to_virt(dev->mem_start);
359 p->iscp = (struct iscp_struct *) ((char *) p->scp - sizeof(struct iscp_struct));
360
361 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
362 memset((char *) p->scp, 0, sizeof(struct scp_struct));
363
364 p->scp->iscp = make24(p->iscp);
365 p->scp->sysbus = SYSBUSVAL;
366 p->iscp->scb_offset = make16(p->scb);
367
368 p->iscp->busy = 1;
369 elmc_id_reset586();
370 elmc_id_attn586();
371
372 DELAY(2);
373
Alexander Beregalov39738e12009-05-26 12:35:26 +0000374 if (p->iscp->busy)
375 pr_err("%s: Init-Problems (alloc).\n", dev->name);
376
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 memset((char *) p->scb, 0, sizeof(struct scb_struct));
378}
379
380/*****************************************************************/
381
382static int elmc_getinfo(char *buf, int slot, void *d)
383{
384 int len = 0;
Joe Perches0795af52007-10-03 17:59:30 -0700385 struct net_device *dev = d;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386
387 if (dev == NULL)
388 return len;
389
390 len += sprintf(buf + len, "Revision: 0x%x\n",
391 inb(dev->base_addr + ELMC_REVISION) & 0xf);
392 len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
393 len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
394 dev->base_addr + ELMC_IO_EXTENT);
395 len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
396 dev->mem_end - 1);
397 len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
398 "External" : "Internal");
399 len += sprintf(buf + len, "Device: %s\n", dev->name);
Johannes Berge1749612008-10-27 15:59:26 -0700400 len += sprintf(buf + len, "Hardware Address: %pM\n",
401 dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402
403 return len;
404} /* elmc_getinfo() */
405
Stephen Hemminger90e64c62009-01-09 13:01:16 +0000406static const struct net_device_ops netdev_ops = {
407 .ndo_open = elmc_open,
408 .ndo_stop = elmc_close,
409 .ndo_get_stats = elmc_get_stats,
410 .ndo_start_xmit = elmc_send_packet,
411 .ndo_tx_timeout = elmc_timeout,
412#ifdef ELMC_MULTICAST
413 .ndo_set_multicast_list = set_multicast_list,
414#endif
415 .ndo_change_mtu = eth_change_mtu,
416 .ndo_set_mac_address = eth_mac_addr,
417 .ndo_validate_addr = eth_validate_addr,
418};
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420/*****************************************************************/
421
422static int __init do_elmc_probe(struct net_device *dev)
423{
424 static int slot;
425 int base_addr = dev->base_addr;
426 int irq = dev->irq;
427 u_char status = 0;
428 u_char revision = 0;
429 int i = 0;
430 unsigned int size = 0;
431 int retval;
Wang Chen454d7c92008-11-12 23:37:49 -0800432 struct priv *pr = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 if (MCA_bus == 0) {
435 return -ENODEV;
436 }
437 /* search through the slots for the 3c523. */
438 slot = mca_find_adapter(ELMC_MCA_ID, 0);
439 while (slot != -1) {
440 status = mca_read_stored_pos(slot, 2);
441
442 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
443 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 /*
446 If we're trying to match a specified irq or IO address,
447 we'll reject a match unless it's what we're looking for.
448 Also reject it if the card is already in use.
449 */
450
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400451 if ((irq && irq != dev->irq) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 (base_addr && base_addr != dev->base_addr)) {
453 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
454 continue;
455 }
456 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
457 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
458 continue;
459 }
460
461 /* found what we're looking for... */
462 break;
463 }
464
465 /* we didn't find any 3c523 in the slots we checked for */
466 if (slot == MCA_NOTFOUND)
467 return ((base_addr || irq) ? -ENXIO : -ENODEV);
468
469 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
470 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
471
472 /* if we get this far, adapter has been found - carry on */
Alexander Beregalov39738e12009-05-26 12:35:26 +0000473 pr_info("%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
475 /* Now we extract configuration info from the card.
476 The 3c523 provides information in two of the POS registers, but
477 the second one is only needed if we want to tell the card what IRQ
478 to use. I suspect that whoever sets the thing up initially would
479 prefer we don't screw with those things.
480
481 Note that we read the status info when we found the card...
482
483 See 3c523.h for more details.
484 */
485
486 /* revision is stored in the first 4 bits of the revision register */
487 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
488
489 /* according to docs, we read the interrupt and write it back to
490 the IRQ select register, since the POST might not configure the IRQ
491 properly. */
492 switch (dev->irq) {
493 case 3:
494 mca_write_pos(slot, 3, 0x04);
495 break;
496 case 7:
497 mca_write_pos(slot, 3, 0x02);
498 break;
499 case 9:
500 mca_write_pos(slot, 3, 0x08);
501 break;
502 case 12:
503 mca_write_pos(slot, 3, 0x01);
504 break;
505 }
506
507 memset(pr, 0, sizeof(struct priv));
508 pr->slot = slot;
509
Alexander Beregalov39738e12009-05-26 12:35:26 +0000510 pr_info("%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 dev->base_addr);
512
513 /* Determine if we're using the on-board transceiver (i.e. coax) or
514 an external one. The information is pretty much useless, but I
515 guess it's worth brownie points. */
516 dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
517
518 /* The 3c523 has a 24K chunk of memory. The first 16K is the
519 shared memory, while the last 8K is for the EtherStart BIOS ROM.
520 Which we don't care much about here. We'll just tell Linux that
521 we're using 16K. MCA won't permit address space conflicts caused
522 by not mapping the other 8K. */
523 dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
524
525 /* We're using MCA, so it's a given that the information about memory
526 size is correct. The Crynwr drivers do something like this. */
527
528 elmc_id_reset586(); /* seems like a good idea before checking it... */
529
530 size = 0x4000; /* check for 16K mem */
531 if (!check586(dev, dev->mem_start, size)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000532 pr_err("%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 dev->mem_start);
534 retval = -ENODEV;
535 goto err_out;
536 }
537 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
538
539 pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
540 pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
541 alloc586(dev);
542
543 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
544
545 /* set number of receive-buffs according to memsize */
546 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
547
548 /* dump all the assorted information */
Alexander Beregalov39738e12009-05-26 12:35:26 +0000549 pr_info("%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400550 dev->irq, dev->if_port ? "ex" : "in",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 dev->mem_start, dev->mem_end - 1);
552
553 /* The hardware address for the 3c523 is stored in the first six
554 bytes of the IO address. */
Joe Perches0795af52007-10-03 17:59:30 -0700555 for (i = 0; i < 6; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 dev->dev_addr[i] = inb(dev->base_addr + i);
Joe Perches0795af52007-10-03 17:59:30 -0700557
Alexander Beregalov39738e12009-05-26 12:35:26 +0000558 pr_info("%s: hardware address %pM\n",
Johannes Berge1749612008-10-27 15:59:26 -0700559 dev->name, dev->dev_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560
Stephen Hemminger90e64c62009-01-09 13:01:16 +0000561 dev->netdev_ops = &netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 dev->watchdog_timeo = HZ;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 dev->ethtool_ops = &netdev_ethtool_ops;
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400564
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 /* note that we haven't actually requested the IRQ from the kernel.
566 That gets done in elmc_open(). I'm not sure that's such a good idea,
567 but it works, so I'll go with it. */
568
569#ifndef ELMC_MULTICAST
570 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
571#endif
572
b1fc5502005-05-12 20:11:55 -0400573 retval = register_netdev(dev);
574 if (retval)
575 goto err_out;
576
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 return 0;
578err_out:
579 mca_set_adapter_procfn(slot, NULL, NULL);
580 release_region(dev->base_addr, ELMC_IO_EXTENT);
581 return retval;
582}
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400583
Ingo Molnar46a84942008-11-25 17:02:20 -0800584#ifdef MODULE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585static void cleanup_card(struct net_device *dev)
586{
Wang Chen454d7c92008-11-12 23:37:49 -0800587 mca_set_adapter_procfn(((struct priv *)netdev_priv(dev))->slot,
588 NULL, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 release_region(dev->base_addr, ELMC_IO_EXTENT);
590}
Ingo Molnar46a84942008-11-25 17:02:20 -0800591#else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592struct net_device * __init elmc_probe(int unit)
593{
594 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
595 int err;
596
597 if (!dev)
598 return ERR_PTR(-ENOMEM);
599
600 sprintf(dev->name, "eth%d", unit);
601 netdev_boot_setup_check(dev);
602
603 err = do_elmc_probe(dev);
604 if (err)
605 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 return dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607out:
608 free_netdev(dev);
609 return ERR_PTR(err);
610}
611#endif
612
613/**********************************************
614 * init the chip (elmc-interrupt should be disabled?!)
615 * needs a correct 'allocated' memory
616 */
617
618static int init586(struct net_device *dev)
619{
620 void *ptr;
621 unsigned long s;
622 int i, result = 0;
Wang Chen454d7c92008-11-12 23:37:49 -0800623 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 volatile struct configure_cmd_struct *cfg_cmd;
625 volatile struct iasetup_cmd_struct *ias_cmd;
626 volatile struct tdr_cmd_struct *tdr_cmd;
627 volatile struct mcsetup_cmd_struct *mc_cmd;
628 struct dev_mc_list *dmi = dev->mc_list;
629 int num_addrs = dev->mc_count;
630
631 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
632
633 cfg_cmd = (struct configure_cmd_struct *) ptr; /* configure-command */
634 cfg_cmd->cmd_status = 0;
635 cfg_cmd->cmd_cmd = CMD_CONFIGURE | CMD_LAST;
636 cfg_cmd->cmd_link = 0xffff;
637
638 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
639 cfg_cmd->fifo = 0x08; /* fifo-limit (8=tx:32/rx:64) */
640 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
641 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
642 cfg_cmd->priority = 0x00;
643 cfg_cmd->ifs = 0x60;
644 cfg_cmd->time_low = 0x00;
645 cfg_cmd->time_high = 0xf2;
646 cfg_cmd->promisc = 0;
Wang Chenc16d1182008-07-22 13:13:12 +0800647 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 cfg_cmd->promisc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 cfg_cmd->carr_coll = 0x00;
650
651 p->scb->cbl_offset = make16(cfg_cmd);
652
653 p->scb->cmd = CUC_START; /* cmd.-unit start */
654 elmc_id_attn586();
655
656 s = jiffies; /* warning: only active with interrupts on !! */
657 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800658 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 break;
660 }
661
662 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000663 pr_warning("%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 return 1;
665 }
666 /*
667 * individual address setup
668 */
669 ias_cmd = (struct iasetup_cmd_struct *) ptr;
670
671 ias_cmd->cmd_status = 0;
672 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
673 ias_cmd->cmd_link = 0xffff;
674
675 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
676
677 p->scb->cbl_offset = make16(ias_cmd);
678
679 p->scb->cmd = CUC_START; /* cmd.-unit start */
680 elmc_id_attn586();
681
682 s = jiffies;
683 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800684 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 break;
686 }
687
688 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000689 pr_warning("%s (elmc): individual address setup command failed: %04x\n",
690 dev->name, ias_cmd->cmd_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 return 1;
692 }
693 /*
694 * TDR, wire check .. e.g. no resistor e.t.c
695 */
696 tdr_cmd = (struct tdr_cmd_struct *) ptr;
697
698 tdr_cmd->cmd_status = 0;
699 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
700 tdr_cmd->cmd_link = 0xffff;
701 tdr_cmd->status = 0;
702
703 p->scb->cbl_offset = make16(tdr_cmd);
704
705 p->scb->cmd = CUC_START; /* cmd.-unit start */
706 elmc_attn586();
707
708 s = jiffies;
709 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800710 if (time_after(jiffies, s + 30*HZ/100)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000711 pr_warning("%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 result = 1;
713 break;
714 }
715 }
716
717 if (!result) {
718 DELAY(2); /* wait for result */
719 result = tdr_cmd->status;
720
721 p->scb->cmd = p->scb->status & STAT_MASK;
722 elmc_id_attn586(); /* ack the interrupts */
723
724 if (result & TDR_LNK_OK) {
725 /* empty */
726 } else if (result & TDR_XCVR_PRB) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000727 pr_warning("%s: TDR: Transceiver problem!\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 } else if (result & TDR_ET_OPN) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000729 pr_warning("%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 } else if (result & TDR_ET_SRT) {
731 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
Alexander Beregalov39738e12009-05-26 12:35:26 +0000732 pr_warning("%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 } else {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000734 pr_warning("%s: TDR: Unknown status %04x\n", dev->name, result);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 }
736 }
737 /*
738 * ack interrupts
739 */
740 p->scb->cmd = p->scb->status & STAT_MASK;
741 elmc_id_attn586();
742
743 /*
744 * alloc nop/xmit-cmds
745 */
746#if (NUM_XMIT_BUFFS == 1)
747 for (i = 0; i < 2; i++) {
748 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
749 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
750 p->nop_cmds[i]->cmd_status = 0;
751 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
752 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
753 }
754 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
755 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
756#else
757 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
758 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
759 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
760 p->nop_cmds[i]->cmd_status = 0;
761 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
762 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
763 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
764 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
765 }
766#endif
767
768 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
769
770 /*
771 * Multicast setup
772 */
773
774 if (dev->mc_count) {
775 /* I don't understand this: do we really need memory after the init? */
776 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
777 if (len <= 0) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000778 pr_err("%s: Ooooops, no memory for MC-Setup!\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 } else {
780 if (len < num_addrs) {
781 num_addrs = len;
Alexander Beregalov39738e12009-05-26 12:35:26 +0000782 pr_warning("%s: Sorry, can only apply %d MC-Address(es).\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 dev->name, num_addrs);
784 }
785 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
786 mc_cmd->cmd_status = 0;
787 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
788 mc_cmd->cmd_link = 0xffff;
789 mc_cmd->mc_cnt = num_addrs * 6;
790 for (i = 0; i < num_addrs; i++) {
791 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
792 dmi = dmi->next;
793 }
794 p->scb->cbl_offset = make16(mc_cmd);
795 p->scb->cmd = CUC_START;
796 elmc_id_attn586();
797 s = jiffies;
798 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
Marcelo Feitoza Parisiff5688a2006-01-09 18:37:15 -0800799 if (time_after(jiffies, s + 30*HZ/100))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 break;
801 }
802 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000803 pr_warning("%s: Can't apply multicast-address-list.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 }
805 }
806 }
807 /*
808 * alloc xmit-buffs / init xmit_cmds
809 */
810 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
811 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
812 ptr = (char *) ptr + XMIT_BUFF_SIZE;
813 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
814 ptr = (char *) ptr + sizeof(struct tbd_struct);
815 if ((void *) ptr > (void *) p->iscp) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000816 pr_err("%s: not enough shared-mem for your configuration!\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817 return 1;
818 }
819 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
820 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
821 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
822 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
823 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
824 p->xmit_buffs[i]->next = 0xffff;
825 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
826 }
827
828 p->xmit_count = 0;
829 p->xmit_last = 0;
830#ifndef NO_NOPCOMMANDS
831 p->nop_point = 0;
832#endif
833
834 /*
835 * 'start transmitter' (nop-loop)
836 */
837#ifndef NO_NOPCOMMANDS
838 p->scb->cbl_offset = make16(p->nop_cmds[0]);
839 p->scb->cmd = CUC_START;
840 elmc_id_attn586();
841 WAIT_4_SCB_CMD();
842#else
843 p->xmit_cmds[0]->cmd_link = 0xffff;
844 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
845#endif
846
847 return 0;
848}
849
850/******************************************************
851 * This is a helper routine for elmc_rnr_int() and init586().
852 * It sets up the Receive Frame Area (RFA).
853 */
854
855static void *alloc_rfa(struct net_device *dev, void *ptr)
856{
857 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
858 volatile struct rbd_struct *rbd;
859 int i;
Wang Chen454d7c92008-11-12 23:37:49 -0800860 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861
862 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
863 p->rfd_first = rfd;
864
865 for (i = 0; i < p->num_recv_buffs; i++) {
866 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
867 }
868 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
869
870 ptr = (void *) (rfd + p->num_recv_buffs);
871
872 rbd = (struct rbd_struct *) ptr;
873 ptr = (void *) (rbd + p->num_recv_buffs);
874
875 /* clr descriptors */
876 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
877
878 for (i = 0; i < p->num_recv_buffs; i++) {
879 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
880 rbd[i].size = RECV_BUFF_SIZE;
881 rbd[i].buffer = make24(ptr);
882 ptr = (char *) ptr + RECV_BUFF_SIZE;
883 }
884
885 p->rfd_top = p->rfd_first;
886 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
887
888 p->scb->rfa_offset = make16(p->rfd_first);
889 p->rfd_first->rbd_offset = make16(rbd);
890
891 return ptr;
892}
893
894
895/**************************************************
896 * Interrupt Handler ...
897 */
898
899static irqreturn_t
David Howells7d12e782006-10-05 14:55:46 +0100900elmc_interrupt(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901{
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400902 struct net_device *dev = dev_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 unsigned short stat;
904 struct priv *p;
905
Jeff Garzikc31f28e2006-10-06 14:56:04 -0400906 if (!netif_running(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 /* The 3c523 has this habit of generating interrupts during the
908 reset. I'm not sure if the ni52 has this same problem, but it's
909 really annoying if we haven't finished initializing it. I was
910 hoping all the elmc_id_* commands would disable this, but I
911 might have missed a few. */
912
913 elmc_id_attn586(); /* ack inter. and disable any more */
914 return IRQ_HANDLED;
915 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
916 /* wasn't this device */
917 return IRQ_NONE;
918 }
919 /* reading ELMC_CTRL also clears the INT bit. */
920
Wang Chen454d7c92008-11-12 23:37:49 -0800921 p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922
Jeff Garzik6aa20a22006-09-13 13:24:59 -0400923 while ((stat = p->scb->status & STAT_MASK))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 {
925 p->scb->cmd = stat;
926 elmc_attn586(); /* ack inter. */
927
928 if (stat & STAT_CX) {
929 /* command with I-bit set complete */
930 elmc_xmt_int(dev);
931 }
932 if (stat & STAT_FR) {
933 /* received a frame */
934 elmc_rcv_int(dev);
935 }
936#ifndef NO_NOPCOMMANDS
937 if (stat & STAT_CNA) {
938 /* CU went 'not ready' */
939 if (netif_running(dev)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000940 pr_warning("%s: oops! CU has left active state. stat: %04x/%04x.\n",
941 dev->name, (int) stat, (int) p->scb->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 }
943 }
944#endif
945
946 if (stat & STAT_RNR) {
947 /* RU went 'not ready' */
948
949 if (p->scb->status & RU_SUSPEND) {
950 /* special case: RU_SUSPEND */
951
952 WAIT_4_SCB_CMD();
953 p->scb->cmd = RUC_RESUME;
954 elmc_attn586();
955 } else {
Alexander Beregalov39738e12009-05-26 12:35:26 +0000956 pr_warning("%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n",
957 dev->name, (int) stat, (int) p->scb->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958 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;
Wang Chen454d7c92008-11-12 23:37:49 -0800979 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
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) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 skb_reserve(skb, 2); /* 16 byte alignment */
991 skb_put(skb,totlen);
David S. Miller8c7b7fa2007-07-10 22:08:12 -0700992 skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700993 skb->protocol = eth_type_trans(skb, dev);
994 netif_rx(skb);
Paulius Zaleckasaa509112008-04-29 11:58:42 +0300995 dev->stats.rx_packets++;
996 dev->stats.rx_bytes += totlen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700997 } else {
Paulius Zaleckasaa509112008-04-29 11:58:42 +0300998 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 }
1000 } else {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001001 pr_warning("%s: received oversized frame.\n", dev->name);
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001002 dev->stats.rx_dropped++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003 }
1004 } else { /* frame !(ok), only with 'save-bad-frames' */
Alexander Beregalov39738e12009-05-26 12:35:26 +00001005 pr_warning("%s: oops! rfd-error-status: %04x\n", dev->name, status);
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001006 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 }
1008 p->rfd_top->status = 0;
1009 p->rfd_top->last = RFD_SUSP;
1010 p->rfd_last->last = 0; /* delete RU_SUSP */
1011 p->rfd_last = p->rfd_top;
1012 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1013 }
1014}
1015
1016/**********************************************************
1017 * handle 'Receiver went not ready'.
1018 */
1019
1020static void elmc_rnr_int(struct net_device *dev)
1021{
Wang Chen454d7c92008-11-12 23:37:49 -08001022 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001023
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001024 dev->stats.rx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025
1026 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1027 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1028 elmc_attn586();
1029 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1030
1031 alloc_rfa(dev, (char *) p->rfd_first);
1032 startrecv586(dev); /* restart RU */
1033
Alexander Beregalov39738e12009-05-26 12:35:26 +00001034 pr_warning("%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035
1036}
1037
1038/**********************************************************
1039 * handle xmit - interrupt
1040 */
1041
1042static void elmc_xmt_int(struct net_device *dev)
1043{
1044 int status;
Wang Chen454d7c92008-11-12 23:37:49 -08001045 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
1047 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1048 if (!(status & STAT_COMPL)) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001049 pr_warning("%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 }
1051 if (status & STAT_OK) {
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001052 dev->stats.tx_packets++;
1053 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 } else {
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001055 dev->stats.tx_errors++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 if (status & TCMD_LATECOLL) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001057 pr_warning("%s: late collision detected.\n", dev->name);
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001058 dev->stats.collisions++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059 } else if (status & TCMD_NOCARRIER) {
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001060 dev->stats.tx_carrier_errors++;
Alexander Beregalov39738e12009-05-26 12:35:26 +00001061 pr_warning("%s: no carrier detected.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062 } else if (status & TCMD_LOSTCTS) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001063 pr_warning("%s: loss of CTS detected.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 } else if (status & TCMD_UNDERRUN) {
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001065 dev->stats.tx_fifo_errors++;
Alexander Beregalov39738e12009-05-26 12:35:26 +00001066 pr_warning("%s: DMA underrun detected.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 } else if (status & TCMD_MAXCOLL) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001068 pr_warning("%s: Max. collisions exceeded.\n", dev->name);
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001069 dev->stats.collisions += 16;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 }
1071 }
1072
1073#if (NUM_XMIT_BUFFS != 1)
1074 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1075 p->xmit_last = 0;
1076 }
1077#endif
1078
1079 netif_wake_queue(dev);
1080}
1081
1082/***********************************************************
1083 * (re)start the receiver
1084 */
1085
1086static void startrecv586(struct net_device *dev)
1087{
Wang Chen454d7c92008-11-12 23:37:49 -08001088 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089
1090 p->scb->rfa_offset = make16(p->rfd_first);
1091 p->scb->cmd = RUC_START;
1092 elmc_attn586(); /* start cmd. */
1093 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1094}
1095
1096/******************************************************
1097 * timeout
1098 */
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001099
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100static void elmc_timeout(struct net_device *dev)
1101{
Wang Chen454d7c92008-11-12 23:37:49 -08001102 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 /* COMMAND-UNIT active? */
1104 if (p->scb->status & CU_ACTIVE) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001105 pr_debug("%s: strange ... timeout with CU active?!?\n", dev->name);
1106 pr_debug("%s: X0: %04x N0: %04x N1: %04x %d\n", dev->name,
1107 (int)p->xmit_cmds[0]->cmd_status,
1108 (int)p->nop_cmds[0]->cmd_status,
1109 (int)p->nop_cmds[1]->cmd_status, (int)p->nop_point);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 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 {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001119 pr_debug("%s: xmitter timed out, try to restart! stat: %04x\n",
1120 dev->name, p->scb->status);
1121 pr_debug("%s: command-stats: %04x %04x\n", dev->name,
1122 p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001123 elmc_close(dev);
1124 elmc_open(dev);
1125 }
1126}
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001127
Linus Torvalds1da177e2005-04-16 15:20:36 -07001128/******************************************************
1129 * send frame
1130 */
1131
Stephen Hemminger27a1de92009-08-31 19:50:54 +00001132static netdev_tx_t elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001133{
1134 int len;
1135 int i;
1136#ifndef NO_NOPCOMMANDS
1137 int next_nop;
1138#endif
Wang Chen454d7c92008-11-12 23:37:49 -08001139 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
1141 netif_stop_queue(dev);
1142
1143 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001144
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145 if (len != skb->len)
1146 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
David S. Miller3dbad802007-03-29 19:16:03 -07001147 skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148
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) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001169 pr_warning("%s: Can't start transmit-command.\n", dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001170 }
1171 }
1172#else
1173 next_nop = (p->nop_point + 1) & 0x1;
1174 p->xmit_buffs[0]->size = TBD_LAST | len;
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001175
Linus Torvalds1da177e2005-04-16 15:20:36 -07001176 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
Patrick McHardy6ed10652009-06-23 06:03:08 +00001201 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001202}
1203
1204/*******************************************
1205 * Someone wanna have the statistics
1206 */
1207
1208static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1209{
Wang Chen454d7c92008-11-12 23:37:49 -08001210 struct priv *p = netdev_priv(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 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
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001222 dev->stats.rx_crc_errors += crc;
1223 dev->stats.rx_fifo_errors += ovrn;
1224 dev->stats.rx_frame_errors += aln;
1225 dev->stats.rx_dropped += rsc;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001226
Paulius Zaleckasaa509112008-04-29 11:58:42 +03001227 return &dev->stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001228}
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
Jeff Garzik7282d492006-09-13 14:30:00 -04001257static const struct ethtool_ops netdev_ethtool_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 .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)");
Randy Dunlap7b240172005-06-13 12:31:53 -07001273MODULE_LICENSE("GPL");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001274
Randy Dunlap96e672c2006-06-10 13:33:48 -07001275int __init init_module(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
1277 int this_dev,found = 0;
1278
Jeff Garzik6aa20a22006-09-13 13:24:59 -04001279 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001280 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) {
b1fc5502005-05-12 20:11:55 -04001287 dev_elmc[this_dev] = dev;
1288 found++;
1289 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 }
1291 free_netdev(dev);
1292 if (io[this_dev]==0)
1293 break;
Alexander Beregalov39738e12009-05-26 12:35:26 +00001294 pr_warning("3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295 }
1296
1297 if(found==0) {
Alexander Beregalov39738e12009-05-26 12:35:26 +00001298 if (io[0]==0)
1299 pr_notice("3c523.c: No 3c523 cards found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300 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 */