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>
108 #include <linux/jiffies.h>
110 #include <asm/uaccess.h>
111 #include <asm/processor.h>
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 */
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 ))
125 /*************************************************************************/
127 Tables to which we can map values in the configuration registers.
129 static int irq_table[] __initdata = {
133 static int csr_table[] __initdata = {
134 0x300, 0x1300, 0x2300, 0x3300
137 static int shm_table[] __initdata = {
138 0x0c0000, 0x0c8000, 0x0d0000, 0x0d8000
141 /******************* how to calculate the buffers *****************************
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'
148 sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
149 sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
150 sizeof(rfd) = 24; sizeof(rbd) = 12;
151 sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
154 * if you don't know the driver, better do not change this values: */
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 */
162 #if (NUM_XMIT_BUFFS == 1)
163 #define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
166 /**************************************************************************/
168 #define DELAY(x) { mdelay(32 * x); }
170 /* a much shorter delay: */
171 #define DELAY_16(); { udelay(16) ; }
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; \
179 printk(KERN_WARNING "%s:%d: scb_cmd timed out .. resetting i82586\n",\
180 dev->name,__LINE__); \
181 elmc_id_reset586(); } } }
183 static irqreturn_t elmc_interrupt(int irq, void *dev_id);
184 static int elmc_open(struct net_device *dev);
185 static int elmc_close(struct net_device *dev);
186 static int elmc_send_packet(struct sk_buff *, struct net_device *);
187 static struct net_device_stats *elmc_get_stats(struct net_device *dev);
188 static void elmc_timeout(struct net_device *dev);
189 #ifdef ELMC_MULTICAST
190 static void set_multicast_list(struct net_device *dev);
192 static const struct ethtool_ops netdev_ethtool_ops;
194 /* helper-functions */
195 static int init586(struct net_device *dev);
196 static int check586(struct net_device *dev, unsigned long where, unsigned size);
197 static void alloc586(struct net_device *dev);
198 static void startrecv586(struct net_device *dev);
199 static void *alloc_rfa(struct net_device *dev, void *ptr);
200 static void elmc_rcv_int(struct net_device *dev);
201 static void elmc_xmt_int(struct net_device *dev);
202 static void elmc_rnr_int(struct net_device *dev);
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, IRQF_SHARED | IRQF_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 = netdev_priv(dev);
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 static void alloc586(struct net_device *dev)
352 struct priv *p = netdev_priv(dev);
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 = d;
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,
397 len += sprintf(buf + len, "Transceiver: %s\n", dev->if_port ?
398 "External" : "Internal");
399 len += sprintf(buf + len, "Device: %s\n", dev->name);
400 len += sprintf(buf + len, "Hardware Address: %pM\n",
404 } /* elmc_getinfo() */
406 static 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,
415 .ndo_change_mtu = eth_change_mtu,
416 .ndo_set_mac_address = eth_mac_addr,
417 .ndo_validate_addr = eth_validate_addr,
420 /*****************************************************************/
422 static int __init do_elmc_probe(struct net_device *dev)
425 int base_addr = dev->base_addr;
430 unsigned int size = 0;
432 struct priv *pr = netdev_priv(dev);
437 /* search through the slots for the 3c523. */
438 slot = mca_find_adapter(ELMC_MCA_ID, 0);
440 status = mca_read_stored_pos(slot, 2);
442 dev->irq=irq_table[(status & ELMC_STATUS_IRQ_SELECT) >> 6];
443 dev->base_addr=csr_table[(status & ELMC_STATUS_CSR_SELECT) >> 1];
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.
451 if ((irq && irq != dev->irq) ||
452 (base_addr && base_addr != dev->base_addr)) {
453 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
456 if (!request_region(dev->base_addr, ELMC_IO_EXTENT, DRV_NAME)) {
457 slot = mca_find_adapter(ELMC_MCA_ID, slot + 1);
461 /* found what we're looking for... */
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);
469 mca_set_adapter_name(slot, "3Com 3c523 Etherlink/MC");
470 mca_set_adapter_procfn(slot, (MCA_ProcFn) elmc_getinfo, dev);
472 /* if we get this far, adapter has been found - carry on */
473 printk(KERN_INFO "%s: 3c523 adapter found in slot %d\n", dev->name, slot + 1);
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.
481 Note that we read the status info when we found the card...
483 See 3c523.h for more details.
486 /* revision is stored in the first 4 bits of the revision register */
487 revision = inb(dev->base_addr + ELMC_REVISION) & 0xf;
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
494 mca_write_pos(slot, 3, 0x04);
497 mca_write_pos(slot, 3, 0x02);
500 mca_write_pos(slot, 3, 0x08);
503 mca_write_pos(slot, 3, 0x01);
507 memset(pr, 0, sizeof(struct priv));
510 printk(KERN_INFO "%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev->name, (int) revision,
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);
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];
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. */
528 elmc_id_reset586(); /* seems like a good idea before checking it... */
530 size = 0x4000; /* check for 16K mem */
531 if (!check586(dev, dev->mem_start, size)) {
532 printk(KERN_ERR "%s: memprobe, Can't find memory at 0x%lx!\n", dev->name,
537 dev->mem_end = dev->mem_start + size; /* set mem_end showed by 'ifconfig' */
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;
543 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
545 /* set number of receive-buffs according to memsize */
546 pr->num_recv_buffs = NUM_RECV_BUFFS_16;
548 /* dump all the assorted information */
549 printk(KERN_INFO "%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev->name,
550 dev->irq, dev->if_port ? "ex" : "in",
551 dev->mem_start, dev->mem_end - 1);
553 /* The hardware address for the 3c523 is stored in the first six
554 bytes of the IO address. */
555 for (i = 0; i < 6; i++)
556 dev->dev_addr[i] = inb(dev->base_addr + i);
558 printk(KERN_INFO "%s: hardware address %pM\n",
559 dev->name, dev->dev_addr);
561 dev->netdev_ops = &netdev_ops;
562 dev->watchdog_timeo = HZ;
563 dev->ethtool_ops = &netdev_ethtool_ops;
565 /* 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. */
569 #ifndef ELMC_MULTICAST
570 dev->flags&=~IFF_MULTICAST; /* Multicast doesn't work */
573 retval = register_netdev(dev);
579 mca_set_adapter_procfn(slot, NULL, NULL);
580 release_region(dev->base_addr, ELMC_IO_EXTENT);
585 static void cleanup_card(struct net_device *dev)
587 mca_set_adapter_procfn(((struct priv *)netdev_priv(dev))->slot,
589 release_region(dev->base_addr, ELMC_IO_EXTENT);
592 struct net_device * __init elmc_probe(int unit)
594 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
598 return ERR_PTR(-ENOMEM);
600 sprintf(dev->name, "eth%d", unit);
601 netdev_boot_setup_check(dev);
603 err = do_elmc_probe(dev);
613 /**********************************************
614 * init the chip (elmc-interrupt should be disabled?!)
615 * needs a correct 'allocated' memory
618 static int init586(struct net_device *dev)
623 struct priv *p = netdev_priv(dev);
624 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;
631 ptr = (void *) ((char *) p->scb + sizeof(struct scb_struct));
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;
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;
644 cfg_cmd->time_low = 0x00;
645 cfg_cmd->time_high = 0xf2;
646 cfg_cmd->promisc = 0;
647 if (dev->flags & (IFF_ALLMULTI | IFF_PROMISC))
648 cfg_cmd->promisc = 1;
649 cfg_cmd->carr_coll = 0x00;
651 p->scb->cbl_offset = make16(cfg_cmd);
653 p->scb->cmd = CUC_START; /* cmd.-unit start */
656 s = jiffies; /* warning: only active with interrupts on !! */
657 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
658 if (time_after(jiffies, s + 30*HZ/100))
662 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
663 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
667 * individual address setup
669 ias_cmd = (struct iasetup_cmd_struct *) ptr;
671 ias_cmd->cmd_status = 0;
672 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
673 ias_cmd->cmd_link = 0xffff;
675 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
677 p->scb->cbl_offset = make16(ias_cmd);
679 p->scb->cmd = CUC_START; /* cmd.-unit start */
683 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
684 if (time_after(jiffies, s + 30*HZ/100))
688 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
689 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
693 * TDR, wire check .. e.g. no resistor e.t.c
695 tdr_cmd = (struct tdr_cmd_struct *) ptr;
697 tdr_cmd->cmd_status = 0;
698 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
699 tdr_cmd->cmd_link = 0xffff;
702 p->scb->cbl_offset = make16(tdr_cmd);
704 p->scb->cmd = CUC_START; /* cmd.-unit start */
708 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
709 if (time_after(jiffies, s + 30*HZ/100)) {
710 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
717 DELAY(2); /* wait for result */
718 result = tdr_cmd->status;
720 p->scb->cmd = p->scb->status & STAT_MASK;
721 elmc_id_attn586(); /* ack the interrupts */
723 if (result & TDR_LNK_OK) {
725 } else if (result & TDR_XCVR_PRB) {
726 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
727 } else if (result & TDR_ET_OPN) {
728 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
729 } else if (result & TDR_ET_SRT) {
730 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
731 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
733 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
739 p->scb->cmd = p->scb->status & STAT_MASK;
743 * alloc nop/xmit-cmds
745 #if (NUM_XMIT_BUFFS == 1)
746 for (i = 0; i < 2; i++) {
747 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
748 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
749 p->nop_cmds[i]->cmd_status = 0;
750 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
751 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
753 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
754 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
756 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
757 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
758 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
759 p->nop_cmds[i]->cmd_status = 0;
760 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
761 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
762 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
763 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
767 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
774 /* I don't understand this: do we really need memory after the init? */
775 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
777 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
779 if (len < num_addrs) {
781 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
782 dev->name, num_addrs);
784 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
785 mc_cmd->cmd_status = 0;
786 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
787 mc_cmd->cmd_link = 0xffff;
788 mc_cmd->mc_cnt = num_addrs * 6;
789 for (i = 0; i < num_addrs; i++) {
790 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
793 p->scb->cbl_offset = make16(mc_cmd);
794 p->scb->cmd = CUC_START;
797 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
798 if (time_after(jiffies, s + 30*HZ/100))
801 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
802 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
807 * alloc xmit-buffs / init xmit_cmds
809 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
810 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
811 ptr = (char *) ptr + XMIT_BUFF_SIZE;
812 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
813 ptr = (char *) ptr + sizeof(struct tbd_struct);
814 if ((void *) ptr > (void *) p->iscp) {
815 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
818 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
819 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
820 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
821 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
822 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
823 p->xmit_buffs[i]->next = 0xffff;
824 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
829 #ifndef NO_NOPCOMMANDS
834 * 'start transmitter' (nop-loop)
836 #ifndef NO_NOPCOMMANDS
837 p->scb->cbl_offset = make16(p->nop_cmds[0]);
838 p->scb->cmd = CUC_START;
842 p->xmit_cmds[0]->cmd_link = 0xffff;
843 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
849 /******************************************************
850 * This is a helper routine for elmc_rnr_int() and init586().
851 * It sets up the Receive Frame Area (RFA).
854 static void *alloc_rfa(struct net_device *dev, void *ptr)
856 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
857 volatile struct rbd_struct *rbd;
859 struct priv *p = netdev_priv(dev);
861 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
864 for (i = 0; i < p->num_recv_buffs; i++) {
865 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
867 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
869 ptr = (void *) (rfd + p->num_recv_buffs);
871 rbd = (struct rbd_struct *) ptr;
872 ptr = (void *) (rbd + p->num_recv_buffs);
874 /* clr descriptors */
875 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
877 for (i = 0; i < p->num_recv_buffs; i++) {
878 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
879 rbd[i].size = RECV_BUFF_SIZE;
880 rbd[i].buffer = make24(ptr);
881 ptr = (char *) ptr + RECV_BUFF_SIZE;
884 p->rfd_top = p->rfd_first;
885 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
887 p->scb->rfa_offset = make16(p->rfd_first);
888 p->rfd_first->rbd_offset = make16(rbd);
894 /**************************************************
895 * Interrupt Handler ...
899 elmc_interrupt(int irq, void *dev_id)
901 struct net_device *dev = dev_id;
905 if (!netif_running(dev)) {
906 /* The 3c523 has this habit of generating interrupts during the
907 reset. I'm not sure if the ni52 has this same problem, but it's
908 really annoying if we haven't finished initializing it. I was
909 hoping all the elmc_id_* commands would disable this, but I
910 might have missed a few. */
912 elmc_id_attn586(); /* ack inter. and disable any more */
914 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
915 /* wasn't this device */
918 /* reading ELMC_CTRL also clears the INT bit. */
920 p = netdev_priv(dev);
922 while ((stat = p->scb->status & STAT_MASK))
925 elmc_attn586(); /* ack inter. */
927 if (stat & STAT_CX) {
928 /* command with I-bit set complete */
931 if (stat & STAT_FR) {
932 /* received a frame */
935 #ifndef NO_NOPCOMMANDS
936 if (stat & STAT_CNA) {
937 /* CU went 'not ready' */
938 if (netif_running(dev)) {
939 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
944 if (stat & STAT_RNR) {
945 /* RU went 'not ready' */
947 if (p->scb->status & RU_SUSPEND) {
948 /* special case: RU_SUSPEND */
951 p->scb->cmd = RUC_RESUME;
954 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
958 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
959 if (p->scb->cmd) { /* timed out? */
966 /*******************************************************
970 static void elmc_rcv_int(struct net_device *dev)
973 unsigned short totlen;
975 struct rbd_struct *rbd;
976 struct priv *p = netdev_priv(dev);
978 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
979 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
981 if (status & STAT_OK) { /* frame received without error? */
982 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
983 totlen &= RBD_MASK; /* length of this frame */
985 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
987 skb_reserve(skb, 2); /* 16 byte alignment */
989 skb_copy_to_linear_data(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen);
990 skb->protocol = eth_type_trans(skb, dev);
992 dev->stats.rx_packets++;
993 dev->stats.rx_bytes += totlen;
995 dev->stats.rx_dropped++;
998 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
999 dev->stats.rx_dropped++;
1001 } else { /* frame !(ok), only with 'save-bad-frames' */
1002 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1003 dev->stats.rx_errors++;
1005 p->rfd_top->status = 0;
1006 p->rfd_top->last = RFD_SUSP;
1007 p->rfd_last->last = 0; /* delete RU_SUSP */
1008 p->rfd_last = p->rfd_top;
1009 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1013 /**********************************************************
1014 * handle 'Receiver went not ready'.
1017 static void elmc_rnr_int(struct net_device *dev)
1019 struct priv *p = netdev_priv(dev);
1021 dev->stats.rx_errors++;
1023 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1024 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1026 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1028 alloc_rfa(dev, (char *) p->rfd_first);
1029 startrecv586(dev); /* restart RU */
1031 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1035 /**********************************************************
1036 * handle xmit - interrupt
1039 static void elmc_xmt_int(struct net_device *dev)
1042 struct priv *p = netdev_priv(dev);
1044 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1045 if (!(status & STAT_COMPL)) {
1046 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1048 if (status & STAT_OK) {
1049 dev->stats.tx_packets++;
1050 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
1052 dev->stats.tx_errors++;
1053 if (status & TCMD_LATECOLL) {
1054 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1055 dev->stats.collisions++;
1056 } else if (status & TCMD_NOCARRIER) {
1057 dev->stats.tx_carrier_errors++;
1058 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1059 } else if (status & TCMD_LOSTCTS) {
1060 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1061 } else if (status & TCMD_UNDERRUN) {
1062 dev->stats.tx_fifo_errors++;
1063 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1064 } else if (status & TCMD_MAXCOLL) {
1065 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1066 dev->stats.collisions += 16;
1070 #if (NUM_XMIT_BUFFS != 1)
1071 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1076 netif_wake_queue(dev);
1079 /***********************************************************
1080 * (re)start the receiver
1083 static void startrecv586(struct net_device *dev)
1085 struct priv *p = netdev_priv(dev);
1087 p->scb->rfa_offset = make16(p->rfd_first);
1088 p->scb->cmd = RUC_START;
1089 elmc_attn586(); /* start cmd. */
1090 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1093 /******************************************************
1097 static void elmc_timeout(struct net_device *dev)
1099 struct priv *p = netdev_priv(dev);
1100 /* COMMAND-UNIT active? */
1101 if (p->scb->status & CU_ACTIVE) {
1103 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1104 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);
1106 p->scb->cmd = CUC_ABORT;
1109 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1110 p->scb->cmd = CUC_START;
1113 netif_wake_queue(dev);
1116 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1117 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1124 /******************************************************
1128 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1132 #ifndef NO_NOPCOMMANDS
1135 struct priv *p = netdev_priv(dev);
1137 netif_stop_queue(dev);
1139 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1141 if (len != skb->len)
1142 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1143 skb_copy_from_linear_data(skb, (char *) p->xmit_cbuffs[p->xmit_count], skb->len);
1145 #if (NUM_XMIT_BUFFS == 1)
1146 #ifdef NO_NOPCOMMANDS
1147 p->xmit_buffs[0]->size = TBD_LAST | len;
1148 for (i = 0; i < 16; i++) {
1149 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1150 p->scb->cmd = CUC_START;
1151 p->xmit_cmds[0]->cmd_status = 0;
1153 dev->trans_start = jiffies;
1158 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1161 if (p->xmit_cmds[0]->cmd_status) {
1165 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1169 next_nop = (p->nop_point + 1) & 0x1;
1170 p->xmit_buffs[0]->size = TBD_LAST | len;
1172 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1173 = make16((p->nop_cmds[next_nop]));
1174 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1176 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1177 dev->trans_start = jiffies;
1178 p->nop_point = next_nop;
1182 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1183 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1186 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1187 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1188 = make16((p->nop_cmds[next_nop]));
1189 p->nop_cmds[next_nop]->cmd_status = 0;
1190 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1191 dev->trans_start = jiffies;
1192 p->xmit_count = next_nop;
1193 if (p->xmit_count != p->xmit_last)
1194 netif_wake_queue(dev);
1200 /*******************************************
1201 * Someone wanna have the statistics
1204 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1206 struct priv *p = netdev_priv(dev);
1207 unsigned short crc, aln, rsc, ovrn;
1209 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1210 p->scb->crc_errs -= crc;
1211 aln = p->scb->aln_errs;
1212 p->scb->aln_errs -= aln;
1213 rsc = p->scb->rsc_errs;
1214 p->scb->rsc_errs -= rsc;
1215 ovrn = p->scb->ovrn_errs;
1216 p->scb->ovrn_errs -= ovrn;
1218 dev->stats.rx_crc_errors += crc;
1219 dev->stats.rx_fifo_errors += ovrn;
1220 dev->stats.rx_frame_errors += aln;
1221 dev->stats.rx_dropped += rsc;
1226 /********************************************************
1230 #ifdef ELMC_MULTICAST
1231 static void set_multicast_list(struct net_device *dev)
1234 /* without a running interface, promiscuous doesn't work */
1245 static void netdev_get_drvinfo(struct net_device *dev,
1246 struct ethtool_drvinfo *info)
1248 strcpy(info->driver, DRV_NAME);
1249 strcpy(info->version, DRV_VERSION);
1250 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1253 static const struct ethtool_ops netdev_ethtool_ops = {
1254 .get_drvinfo = netdev_get_drvinfo,
1259 /* Increase if needed ;) */
1260 #define MAX_3C523_CARDS 4
1262 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1263 static int irq[MAX_3C523_CARDS];
1264 static int io[MAX_3C523_CARDS];
1265 module_param_array(irq, int, NULL, 0);
1266 module_param_array(io, int, NULL, 0);
1267 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1268 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1269 MODULE_LICENSE("GPL");
1271 int __init init_module(void)
1273 int this_dev,found = 0;
1275 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1276 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1277 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1280 dev->irq=irq[this_dev];
1281 dev->base_addr=io[this_dev];
1282 if (do_elmc_probe(dev) == 0) {
1283 dev_elmc[this_dev] = dev;
1288 if (io[this_dev]==0)
1290 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1294 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1299 void __exit cleanup_module(void)
1302 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1303 struct net_device *dev = dev_elmc[this_dev];
1305 unregister_netdev(dev);