2 net-3-driver for the 3c523 Etherlink/MC card (i82586 Ethernet chip)
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.
8 Copyright 1995, 1996 by Chris Beauregard (cpbeaure@undergrad.math.uwaterloo.ca)
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.
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.
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.
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/">
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.
34 The original device probe code was stolen from ps2esdi.c
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.
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?
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.
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
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
65 This driver does support multiple ethernet cards when used as a module
66 (up to MAX_3C523_CARDS, the default being 4)
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
76 update to 1.3.59, incorporated multicast diffs from ni52.c
78 added shared irq support
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>
85 added support for ethtool (jgarzik)
87 $Header: /fsys2/home/chrisb/linux-1.3.59-MCA/drivers/net/RCS/3c523.c,v 1.1 1996/02/05 01:53:46 chrisb Exp chrisb $
90 #define DRV_NAME "3c523"
91 #define DRV_VERSION "17-Nov-2001"
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>
109 #include <asm/uaccess.h>
110 #include <asm/processor.h>
115 /*************************************************************************/
116 #define DEBUG /* debug on */
117 #define SYSBUSVAL 0 /* 1 = 8 Bit, 0 = 16 bit - 3c523 only does 16 bit */
118 #undef ELMC_MULTICAST /* Disable multicast support as it is somewhat seriously broken at the moment */
120 #define make32(ptr16) (p->memtop + (short) (ptr16) )
121 #define make24(ptr32) ((char *) (ptr32) - p->base)
122 #define make16(ptr32) ((unsigned short) ((unsigned long) (ptr32) - (unsigned long) p->memtop ))
124 /*************************************************************************/
126 Tables to which we can map values in the configuration registers.
128 static int irq_table[] __initdata = {
132 static int csr_table[] __initdata = {
133 0x300, 0x1300, 0x2300, 0x3300
136 static int shm_table[] __initdata = {
137 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
140 /******************* how to calculate the buffers *****************************
143 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
144 * --------------- in a different (more stable?) mode. Only in this mode it's
145 * possible to configure the driver with 'NO_NOPCOMMANDS'
147 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
148 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
149 sizeof(rfd) = 24; sizeof(rbd) = 12;
150 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
153 * if you don't know the driver, better do not change this values: */
155 #define RECV_BUFF_SIZE 1524 /* slightly oversized */
156 #define XMIT_BUFF_SIZE 1524 /* slightly oversized */
157 #define NUM_XMIT_BUFFS 1 /* config for both, 8K and 16K shmem */
158 #define NUM_RECV_BUFFS_8 4 /* config for 8K shared mem */
159 #define NUM_RECV_BUFFS_16 9 /* config for 16K shared mem */
161 #if (NUM_XMIT_BUFFS == 1)
162 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
165 /**************************************************************************/
167 #define DELAY(x) { mdelay(32 * x); }
169 /* a much shorter delay: */
170 #define DELAY_16(); { udelay(16) ; }
172 /* wait for command with timeout: */
173 #define WAIT_4_SCB_CMD() { int i; \
174 for(i=0;i<1024;i++) { \
175 if(!p->scb->cmd) break; \
178 printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
179 dev->name,__LINE__); \
180 elmc_id_reset586(); } } }
182 static irqreturn_t elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr);
183 static int elmc_open(struct net_device *dev);
184 static int elmc_close(struct net_device *dev);
185 static int elmc_send_packet(struct sk_buff *, struct net_device *);
186 static struct net_device_stats *elmc_get_stats(struct net_device *dev);
187 static void elmc_timeout(struct net_device *dev);
188 #ifdef ELMC_MULTICAST
189 static void set_multicast_list(struct net_device *dev);
191 static struct ethtool_ops netdev_ethtool_ops;
193 /* helper-functions */
194 static int init586(struct net_device *dev);
195 static int check586(struct net_device *dev, unsigned long where, unsigned size);
196 static void alloc586(struct net_device *dev);
197 static void startrecv586(struct net_device *dev);
198 static void *alloc_rfa(struct net_device *dev, void *ptr);
199 static void elmc_rcv_int(struct net_device *dev);
200 static void elmc_xmt_int(struct net_device *dev);
201 static void elmc_rnr_int(struct net_device *dev);
204 struct net_device_stats stats;
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];
217 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
218 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
220 volatile int nop_point, num_recv_buffs;
221 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
222 volatile int xmit_count, xmit_last;
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);}
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);}
235 /*************************************************************************/
237 Do a Channel Attention on the 3c523. This is extremely board dependent.
239 static void elmc_do_attn586(int ioaddr, int ints)
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. */
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. */
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);
255 /*************************************************************************/
257 Reset the 82586 on the 3c523. Also very board dependent.
259 static void elmc_do_reset586(int ioaddr, int ints)
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);
266 elmc_do_attn586(ioaddr, ints);
269 /**********************************************
273 static int elmc_close(struct net_device *dev)
275 netif_stop_queue(dev);
276 elmc_id_reset586(); /* the hard way to stop the receiver */
277 free_irq(dev->irq, dev);
281 /**********************************************
285 static int elmc_open(struct net_device *dev)
289 elmc_id_attn586(); /* disable interrupts */
291 ret = request_irq(dev->irq, &elmc_interrupt, SA_SHIRQ | SA_SAMPLE_RANDOM,
294 printk(KERN_ERR "%s: couldn't get irq %d\n", dev->name, dev->irq);
301 netif_start_queue(dev);
302 return 0; /* most done by init */
305 /**********************************************
306 * Check to see if there's an 82586 out there.
309 static int __init check586(struct net_device *dev, unsigned long where, unsigned size)
311 struct priv *p = (struct priv *) dev->priv;
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 */
321 iscp_addrs[0] = isa_bus_to_virt((unsigned long)where);
322 iscp_addrs[1] = (char *) p->scp - sizeof(struct iscp_struct);
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));
328 p->scp->iscp = make24(p->iscp);
333 /* reset586 does an implicit CA */
335 /* apparently, you sometimes have to kick the 82586 twice... */
339 if (p->iscp->busy) { /* i82586 clears 'busy' after successful init */
346 /******************************************************************
347 * set iscp at the right place, called by elmc_probe and open586.
350 void alloc586(struct net_device *dev)
352 struct priv *p = (struct priv *) dev->priv;
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));
361 memset((char *) p->iscp, 0, sizeof(struct iscp_struct));
362 memset((char *) p->scp, 0, sizeof(struct scp_struct));
364 p->scp->iscp = make24(p->iscp);
365 p->scp->sysbus = SYSBUSVAL;
366 p->iscp->scb_offset = make16(p->scb);
375 printk(KERN_ERR "%s: Init-Problems (alloc).\n", dev->name);
377 memset((char *) p->scb, 0, sizeof(struct scb_struct));
380 /*****************************************************************/
382 static int elmc_getinfo(char *buf, int slot, void *d)
385 struct net_device *dev = (struct net_device *) d;
391 len += sprintf(buf + len, "Revision: 0x%x\n",
392 inb(dev->base_addr + ELMC_REVISION) & 0xf);
393 len += sprintf(buf + len, "IRQ: %d\n", dev->irq);
394 len += sprintf(buf + len, "IO Address: %#lx-%#lx\n", dev->base_addr,
395 dev->base_addr + ELMC_IO_EXTENT);
396 len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start,
398 len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
399 "External" : "Internal");
400 len += sprintf(buf + len, "Device: %s\n", dev->name);
401 len += sprintf(buf + len, "Hardware Address:");
402 for (i = 0; i < 6; i++) {
403 len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
409 } /* elmc_getinfo() */
411 /*****************************************************************/
413 static int __init do_elmc_probe(struct net_device *dev)
416 int base_addr = dev->base_addr;
421 unsigned int size = 0;
423 struct priv *pr = dev->priv;
425 SET_MODULE_OWNER(dev);
429 /* search through the slots for the 3c523. */
430 slot = mca_find_adapter(ELMC_MCA_ID, 0);
432 status = mca_read_stored_pos(slot, 2);
434 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
435 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
438 If we're trying to match a specified irq or IO address,
439 we'll reject a match unless it's what we're looking for.
440 Also reject it if the card is already in use.
443 if ((irq && irq != dev->irq) ||
444 (base_addr && base_addr != dev->base_addr)) {
445 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
448 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
449 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
453 /* found what we're looking for... */
457 /* we didn't find any 3c523 in the slots we checked for */
458 if (slot == MCA_NOTFOUND)
459 return ((base_addr || irq) ? -ENXIO : -ENODEV);
461 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
462 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
464 /* if we get this far, adapter has been found - carry on */
465 printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
467 /* Now we extract configuration info from the card.
468 The 3c523 provides information in two of the POS registers, but
469 the second one is only needed if we want to tell the card what IRQ
470 to use. I suspect that whoever sets the thing up initially would
471 prefer we don't screw with those things.
473 Note that we read the status info when we found the card...
475 See 3c523.h for more details.
478 /* revision is stored in the first 4 bits of the revision register */
479 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
481 /* according to docs, we read the interrupt and write it back to
482 the IRQ select register, since the POST might not configure the IRQ
486 mca_write_pos(slot, 3, 0x04);
489 mca_write_pos(slot, 3, 0x02);
492 mca_write_pos(slot, 3, 0x08);
495 mca_write_pos(slot, 3, 0x01);
499 memset(pr, 0, sizeof(struct priv));
502 printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
505 /* Determine if we're using the on-board transceiver (i.e. coax) or
506 an external one. The information is pretty much useless, but I
507 guess it's worth brownie points. */
508 dev->if_port = (status & ELMC_STATUS_DISABLE_THIN);
510 /* The 3c523 has a 24K chunk of memory. The first 16K is the
511 shared memory, while the last 8K is for the EtherStart BIOS ROM.
512 Which we don't care much about here. We'll just tell Linux that
513 we're using 16K. MCA won't permit address space conflicts caused
514 by not mapping the other 8K. */
515 dev->mem_start = shm_table[(status & ELMC_STATUS_MEMORY_SELECT) >> 3];
517 /* We're using MCA, so it's a given that the information about memory
518 size is correct. The Crynwr drivers do something like this. */
520 elmc_id_reset586(); /* seems like a good idea before checking it... */
522 size = 0x4000; /* check for 16K mem */
523 if (!check586(dev, dev->mem_start, size)) {
524 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
529 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
531 pr->memtop = isa_bus_to_virt(dev->mem_start) + size;
532 pr->base = (unsigned long) isa_bus_to_virt(dev->mem_start) + size - 0x01000000;
535 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
537 /* set number of receive-buffs according to memsize */
538 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
540 /* dump all the assorted information */
541 printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
542 dev->irq, dev->if_port ? "ex" : "in",
543 dev->mem_start, dev->mem_end - 1);
545 /* The hardware address for the 3c523 is stored in the first six
546 bytes of the IO address. */
547 printk(KERN_INFO "%s: hardware address ", dev->name);
548 for (i = 0; i < 6; i++) {
549 dev->dev_addr[i] = inb(dev->base_addr + i);
550 printk(" %02x", dev->dev_addr[i]);
554 dev->open = &elmc_open;
555 dev->stop = &elmc_close;
556 dev->get_stats = &elmc_get_stats;
557 dev->hard_start_xmit = &elmc_send_packet;
558 dev->tx_timeout = &elmc_timeout;
559 dev->watchdog_timeo = HZ;
560 #ifdef ELMC_MULTICAST
561 dev->set_multicast_list = &set_multicast_list;
563 dev->set_multicast_list = NULL;
565 dev->ethtool_ops = &netdev_ethtool_ops;
567 /* note that we haven't actually requested the IRQ from the kernel.
568 That gets done in elmc_open(). I'm not sure that's such a good idea,
569 but it works, so I'll go with it. */
571 #ifndef ELMC_MULTICAST
572 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
577 mca_set_adapter_procfn(slot, NULL, NULL);
578 release_region(dev->base_addr, ELMC_IO_EXTENT);
582 static void cleanup_card(struct net_device *dev)
584 mca_set_adapter_procfn(((struct priv *) (dev->priv))->slot, NULL, NULL);
585 release_region(dev->base_addr, ELMC_IO_EXTENT);
589 struct net_device * __init elmc_probe(int unit)
591 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
595 return ERR_PTR(-ENOMEM);
597 sprintf(dev->name, "eth%d", unit);
598 netdev_boot_setup_check(dev);
600 err = do_elmc_probe(dev);
603 err = register_netdev(dev);
615 /**********************************************
616 * init the chip (elmc-interrupt should be disabled?!)
617 * needs a correct 'allocated' memory
620 static int init586(struct net_device *dev)
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;
633 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
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;
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;
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;
653 cfg_cmd->carr_coll = 0x00;
655 p->scb->cbl_offset = make16(cfg_cmd);
657 p->scb->cmd = CUC_START; /* cmd.-unit start */
660 s = jiffies; /* warning: only active with interrupts on !! */
661 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
662 if (jiffies - s > 30*HZ/100)
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);
671 * individual address setup
673 ias_cmd = (struct iasetup_cmd_struct *) ptr;
675 ias_cmd->cmd_status = 0;
676 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
677 ias_cmd->cmd_link = 0xffff;
679 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
681 p->scb->cbl_offset = make16(ias_cmd);
683 p->scb->cmd = CUC_START; /* cmd.-unit start */
687 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
688 if (jiffies - s > 30*HZ/100)
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);
697 * TDR, wire check .. e.g. no resistor e.t.c
699 tdr_cmd = (struct tdr_cmd_struct *) ptr;
701 tdr_cmd->cmd_status = 0;
702 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
703 tdr_cmd->cmd_link = 0xffff;
706 p->scb->cbl_offset = make16(tdr_cmd);
708 p->scb->cmd = CUC_START; /* cmd.-unit start */
712 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
713 if (jiffies - s > 30*HZ/100) {
714 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
721 DELAY(2); /* wait for result */
722 result = tdr_cmd->status;
724 p->scb->cmd = p->scb->status & STAT_MASK;
725 elmc_id_attn586(); /* ack the interrupts */
727 if (result & TDR_LNK_OK) {
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);
737 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
743 p->scb->cmd = p->scb->status & STAT_MASK;
747 * alloc nop/xmit-cmds
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);
757 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
758 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
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);
771 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
778 /* I don't understand this: do we really need memory after the init? */
779 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
781 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
783 if (len < num_addrs) {
785 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
786 dev->name, num_addrs);
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);
797 p->scb->cbl_offset = make16(mc_cmd);
798 p->scb->cmd = CUC_START;
801 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
802 if (jiffies - s > 30*HZ/100)
805 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
806 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
811 * alloc xmit-buffs / init xmit_cmds
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);
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]));
833 #ifndef NO_NOPCOMMANDS
838 * 'start transmitter' (nop-loop)
840 #ifndef NO_NOPCOMMANDS
841 p->scb->cbl_offset = make16(p->nop_cmds[0]);
842 p->scb->cmd = CUC_START;
846 p->xmit_cmds[0]->cmd_link = 0xffff;
847 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
853 /******************************************************
854 * This is a helper routine for elmc_rnr_int() and init586().
855 * It sets up the Receive Frame Area (RFA).
858 static void *alloc_rfa(struct net_device *dev, void *ptr)
860 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
861 volatile struct rbd_struct *rbd;
863 struct priv *p = (struct priv *) dev->priv;
865 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
868 for (i = 0; i < p->num_recv_buffs; i++) {
869 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
871 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
873 ptr = (void *) (rfd + p->num_recv_buffs);
875 rbd = (struct rbd_struct *) ptr;
876 ptr = (void *) (rbd + p->num_recv_buffs);
878 /* clr descriptors */
879 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
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;
888 p->rfd_top = p->rfd_first;
889 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
891 p->scb->rfa_offset = make16(p->rfd_first);
892 p->rfd_first->rbd_offset = make16(rbd);
898 /**************************************************
899 * Interrupt Handler ...
903 elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
905 struct net_device *dev = (struct net_device *) dev_id;
910 printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2));
912 } else if (!netif_running(dev)) {
913 /* The 3c523 has this habit of generating interrupts during the
914 reset. I'm not sure if the ni52 has this same problem, but it's
915 really annoying if we haven't finished initializing it. I was
916 hoping all the elmc_id_* commands would disable this, but I
917 might have missed a few. */
919 elmc_id_attn586(); /* ack inter. and disable any more */
921 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
922 /* wasn't this device */
925 /* reading ELMC_CTRL also clears the INT bit. */
927 p = (struct priv *) dev->priv;
929 while ((stat = p->scb->status & STAT_MASK))
932 elmc_attn586(); /* ack inter. */
934 if (stat & STAT_CX) {
935 /* command with I-bit set complete */
938 if (stat & STAT_FR) {
939 /* received a frame */
942 #ifndef NO_NOPCOMMANDS
943 if (stat & STAT_CNA) {
944 /* CU went 'not ready' */
945 if (netif_running(dev)) {
946 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
951 if (stat & STAT_RNR) {
952 /* RU went 'not ready' */
954 if (p->scb->status & RU_SUSPEND) {
955 /* special case: RU_SUSPEND */
958 p->scb->cmd = RUC_RESUME;
961 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
965 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
966 if (p->scb->cmd) { /* timed out? */
973 /*******************************************************
977 static void elmc_rcv_int(struct net_device *dev)
980 unsigned short totlen;
982 struct rbd_struct *rbd;
983 struct priv *p = (struct priv *) dev->priv;
985 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
986 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
988 if (status & STAT_OK) { /* frame received without error? */
989 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
990 totlen &= RBD_MASK; /* length of this frame */
992 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
995 skb_reserve(skb, 2); /* 16 byte alignment */
997 eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
998 skb->protocol = eth_type_trans(skb, dev);
1000 dev->last_rx = jiffies;
1001 p->stats.rx_packets++;
1002 p->stats.rx_bytes += totlen;
1004 p->stats.rx_dropped++;
1007 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1008 p->stats.rx_dropped++;
1010 } else { /* frame !(ok), only with 'save-bad-frames' */
1011 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1012 p->stats.rx_errors++;
1014 p->rfd_top->status = 0;
1015 p->rfd_top->last = RFD_SUSP;
1016 p->rfd_last->last = 0; /* delete RU_SUSP */
1017 p->rfd_last = p->rfd_top;
1018 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1022 /**********************************************************
1023 * handle 'Receiver went not ready'.
1026 static void elmc_rnr_int(struct net_device *dev)
1028 struct priv *p = (struct priv *) dev->priv;
1030 p->stats.rx_errors++;
1032 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1033 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1035 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1037 alloc_rfa(dev, (char *) p->rfd_first);
1038 startrecv586(dev); /* restart RU */
1040 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1044 /**********************************************************
1045 * handle xmit - interrupt
1048 static void elmc_xmt_int(struct net_device *dev)
1051 struct priv *p = (struct priv *) dev->priv;
1053 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1054 if (!(status & STAT_COMPL)) {
1055 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1057 if (status & STAT_OK) {
1058 p->stats.tx_packets++;
1059 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1061 p->stats.tx_errors++;
1062 if (status & TCMD_LATECOLL) {
1063 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1064 p->stats.collisions++;
1065 } else if (status & TCMD_NOCARRIER) {
1066 p->stats.tx_carrier_errors++;
1067 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1068 } else if (status & TCMD_LOSTCTS) {
1069 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1070 } else if (status & TCMD_UNDERRUN) {
1071 p->stats.tx_fifo_errors++;
1072 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1073 } else if (status & TCMD_MAXCOLL) {
1074 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1075 p->stats.collisions += 16;
1079 #if (NUM_XMIT_BUFFS != 1)
1080 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1085 netif_wake_queue(dev);
1088 /***********************************************************
1089 * (re)start the receiver
1092 static void startrecv586(struct net_device *dev)
1094 struct priv *p = (struct priv *) dev->priv;
1096 p->scb->rfa_offset = make16(p->rfd_first);
1097 p->scb->cmd = RUC_START;
1098 elmc_attn586(); /* start cmd. */
1099 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1102 /******************************************************
1106 static void elmc_timeout(struct net_device *dev)
1108 struct priv *p = (struct priv *) dev->priv;
1109 /* COMMAND-UNIT active? */
1110 if (p->scb->status & CU_ACTIVE) {
1112 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1113 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);
1115 p->scb->cmd = CUC_ABORT;
1118 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1119 p->scb->cmd = CUC_START;
1122 netif_wake_queue(dev);
1125 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1126 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1133 /******************************************************
1137 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1141 #ifndef NO_NOPCOMMANDS
1144 struct priv *p = (struct priv *) dev->priv;
1146 netif_stop_queue(dev);
1148 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1150 if (len != skb->len)
1151 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1152 memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
1154 #if (NUM_XMIT_BUFFS == 1)
1155 #ifdef NO_NOPCOMMANDS
1156 p->xmit_buffs[0]->size = TBD_LAST | len;
1157 for (i = 0; i < 16; i++) {
1158 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1159 p->scb->cmd = CUC_START;
1160 p->xmit_cmds[0]->cmd_status = 0;
1162 dev->trans_start = jiffies;
1167 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1170 if (p->xmit_cmds[0]->cmd_status) {
1174 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1178 next_nop = (p->nop_point + 1) & 0x1;
1179 p->xmit_buffs[0]->size = TBD_LAST | len;
1181 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1182 = make16((p->nop_cmds[next_nop]));
1183 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1185 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1186 dev->trans_start = jiffies;
1187 p->nop_point = next_nop;
1191 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1192 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1195 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1196 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1197 = make16((p->nop_cmds[next_nop]));
1198 p->nop_cmds[next_nop]->cmd_status = 0;
1199 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1200 dev->trans_start = jiffies;
1201 p->xmit_count = next_nop;
1202 if (p->xmit_count != p->xmit_last)
1203 netif_wake_queue(dev);
1209 /*******************************************
1210 * Someone wanna have the statistics
1213 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1215 struct priv *p = (struct priv *) dev->priv;
1216 unsigned short crc, aln, rsc, ovrn;
1218 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1219 p->scb->crc_errs -= crc;
1220 aln = p->scb->aln_errs;
1221 p->scb->aln_errs -= aln;
1222 rsc = p->scb->rsc_errs;
1223 p->scb->rsc_errs -= rsc;
1224 ovrn = p->scb->ovrn_errs;
1225 p->scb->ovrn_errs -= ovrn;
1227 p->stats.rx_crc_errors += crc;
1228 p->stats.rx_fifo_errors += ovrn;
1229 p->stats.rx_frame_errors += aln;
1230 p->stats.rx_dropped += rsc;
1235 /********************************************************
1239 #ifdef ELMC_MULTICAST
1240 static void set_multicast_list(struct net_device *dev)
1243 /* without a running interface, promiscuous doesn't work */
1254 static void netdev_get_drvinfo(struct net_device *dev,
1255 struct ethtool_drvinfo *info)
1257 strcpy(info->driver, DRV_NAME);
1258 strcpy(info->version, DRV_VERSION);
1259 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1262 static struct ethtool_ops netdev_ethtool_ops = {
1263 .get_drvinfo = netdev_get_drvinfo,
1268 /* Increase if needed ;) */
1269 #define MAX_3C523_CARDS 4
1271 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1272 static int irq[MAX_3C523_CARDS];
1273 static int io[MAX_3C523_CARDS];
1274 module_param_array(irq, int, NULL, 0);
1275 module_param_array(io, int, NULL, 0);
1276 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1277 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1279 int init_module(void)
1281 int this_dev,found = 0;
1283 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1284 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1285 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1288 dev->irq=irq[this_dev];
1289 dev->base_addr=io[this_dev];
1290 if (do_elmc_probe(dev) == 0) {
1291 if (register_netdev(dev) == 0) {
1292 dev_elmc[this_dev] = dev;
1299 if (io[this_dev]==0)
1301 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1305 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1310 void cleanup_module(void)
1313 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1314 struct net_device *dev = dev_elmc[this_dev];
1316 unregister_netdev(dev);