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>
108 #include <asm/uaccess.h>
109 #include <asm/processor.h>
110 #include <asm/bitops.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, dev->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);
588 struct net_device * __init elmc_probe(int unit)
590 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
594 return ERR_PTR(-ENOMEM);
596 sprintf(dev->name, "eth%d", unit);
597 netdev_boot_setup_check(dev);
599 err = do_elmc_probe(dev);
602 err = register_netdev(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 = (struct priv *) dev->priv;
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 dev->flags |= IFF_PROMISC;
651 cfg_cmd->carr_coll = 0x00;
653 p->scb->cbl_offset = make16(cfg_cmd);
655 p->scb->cmd = CUC_START; /* cmd.-unit start */
658 s = jiffies; /* warning: only active with interrupts on !! */
659 while (!(cfg_cmd->cmd_status & STAT_COMPL)) {
660 if (jiffies - s > 30*HZ/100)
664 if ((cfg_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_COMPL | STAT_OK)) {
665 printk(KERN_WARNING "%s (elmc): configure command failed: %x\n", dev->name, cfg_cmd->cmd_status);
669 * individual address setup
671 ias_cmd = (struct iasetup_cmd_struct *) ptr;
673 ias_cmd->cmd_status = 0;
674 ias_cmd->cmd_cmd = CMD_IASETUP | CMD_LAST;
675 ias_cmd->cmd_link = 0xffff;
677 memcpy((char *) &ias_cmd->iaddr, (char *) dev->dev_addr, ETH_ALEN);
679 p->scb->cbl_offset = make16(ias_cmd);
681 p->scb->cmd = CUC_START; /* cmd.-unit start */
685 while (!(ias_cmd->cmd_status & STAT_COMPL)) {
686 if (jiffies - s > 30*HZ/100)
690 if ((ias_cmd->cmd_status & (STAT_OK | STAT_COMPL)) != (STAT_OK | STAT_COMPL)) {
691 printk(KERN_WARNING "%s (elmc): individual address setup command failed: %04x\n", dev->name, ias_cmd->cmd_status);
695 * TDR, wire check .. e.g. no resistor e.t.c
697 tdr_cmd = (struct tdr_cmd_struct *) ptr;
699 tdr_cmd->cmd_status = 0;
700 tdr_cmd->cmd_cmd = CMD_TDR | CMD_LAST;
701 tdr_cmd->cmd_link = 0xffff;
704 p->scb->cbl_offset = make16(tdr_cmd);
706 p->scb->cmd = CUC_START; /* cmd.-unit start */
710 while (!(tdr_cmd->cmd_status & STAT_COMPL)) {
711 if (jiffies - s > 30*HZ/100) {
712 printk(KERN_WARNING "%s: %d Problems while running the TDR.\n", dev->name, __LINE__);
719 DELAY(2); /* wait for result */
720 result = tdr_cmd->status;
722 p->scb->cmd = p->scb->status & STAT_MASK;
723 elmc_id_attn586(); /* ack the interrupts */
725 if (result & TDR_LNK_OK) {
727 } else if (result & TDR_XCVR_PRB) {
728 printk(KERN_WARNING "%s: TDR: Transceiver problem!\n", dev->name);
729 } else if (result & TDR_ET_OPN) {
730 printk(KERN_WARNING "%s: TDR: No correct termination %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
731 } else if (result & TDR_ET_SRT) {
732 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
733 printk(KERN_WARNING "%s: TDR: Detected a short circuit %d clocks away.\n", dev->name, result & TDR_TIMEMASK);
735 printk(KERN_WARNING "%s: TDR: Unknown status %04x\n", dev->name, result);
741 p->scb->cmd = p->scb->status & STAT_MASK;
745 * alloc nop/xmit-cmds
747 #if (NUM_XMIT_BUFFS == 1)
748 for (i = 0; i < 2; i++) {
749 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
750 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
751 p->nop_cmds[i]->cmd_status = 0;
752 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
753 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
755 p->xmit_cmds[0] = (struct transmit_cmd_struct *) ptr; /* transmit cmd/buff 0 */
756 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
758 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
759 p->nop_cmds[i] = (struct nop_cmd_struct *) ptr;
760 p->nop_cmds[i]->cmd_cmd = CMD_NOP;
761 p->nop_cmds[i]->cmd_status = 0;
762 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
763 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
764 p->xmit_cmds[i] = (struct transmit_cmd_struct *) ptr; /*transmit cmd/buff 0 */
765 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
769 ptr = alloc_rfa(dev, (void *) ptr); /* init receive-frame-area */
776 /* I don't understand this: do we really need memory after the init? */
777 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
779 printk(KERN_ERR "%s: Ooooops, no memory for MC-Setup!\n", dev->name);
781 if (len < num_addrs) {
783 printk(KERN_WARNING "%s: Sorry, can only apply %d MC-Address(es).\n",
784 dev->name, num_addrs);
786 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
787 mc_cmd->cmd_status = 0;
788 mc_cmd->cmd_cmd = CMD_MCSETUP | CMD_LAST;
789 mc_cmd->cmd_link = 0xffff;
790 mc_cmd->mc_cnt = num_addrs * 6;
791 for (i = 0; i < num_addrs; i++) {
792 memcpy((char *) mc_cmd->mc_list[i], dmi->dmi_addr, 6);
795 p->scb->cbl_offset = make16(mc_cmd);
796 p->scb->cmd = CUC_START;
799 while (!(mc_cmd->cmd_status & STAT_COMPL)) {
800 if (jiffies - s > 30*HZ/100)
803 if (!(mc_cmd->cmd_status & STAT_COMPL)) {
804 printk(KERN_WARNING "%s: Can't apply multicast-address-list.\n", dev->name);
809 * alloc xmit-buffs / init xmit_cmds
811 for (i = 0; i < NUM_XMIT_BUFFS; i++) {
812 p->xmit_cbuffs[i] = (char *) ptr; /* char-buffs */
813 ptr = (char *) ptr + XMIT_BUFF_SIZE;
814 p->xmit_buffs[i] = (struct tbd_struct *) ptr; /* TBD */
815 ptr = (char *) ptr + sizeof(struct tbd_struct);
816 if ((void *) ptr > (void *) p->iscp) {
817 printk(KERN_ERR "%s: not enough shared-mem for your configuration!\n", dev->name);
820 memset((char *) (p->xmit_cmds[i]), 0, sizeof(struct transmit_cmd_struct));
821 memset((char *) (p->xmit_buffs[i]), 0, sizeof(struct tbd_struct));
822 p->xmit_cmds[i]->cmd_status = STAT_COMPL;
823 p->xmit_cmds[i]->cmd_cmd = CMD_XMIT | CMD_INT;
824 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
825 p->xmit_buffs[i]->next = 0xffff;
826 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
831 #ifndef NO_NOPCOMMANDS
836 * 'start transmitter' (nop-loop)
838 #ifndef NO_NOPCOMMANDS
839 p->scb->cbl_offset = make16(p->nop_cmds[0]);
840 p->scb->cmd = CUC_START;
844 p->xmit_cmds[0]->cmd_link = 0xffff;
845 p->xmit_cmds[0]->cmd_cmd = CMD_XMIT | CMD_LAST | CMD_INT;
851 /******************************************************
852 * This is a helper routine for elmc_rnr_int() and init586().
853 * It sets up the Receive Frame Area (RFA).
856 static void *alloc_rfa(struct net_device *dev, void *ptr)
858 volatile struct rfd_struct *rfd = (struct rfd_struct *) ptr;
859 volatile struct rbd_struct *rbd;
861 struct priv *p = (struct priv *) dev->priv;
863 memset((char *) rfd, 0, sizeof(struct rfd_struct) * p->num_recv_buffs);
866 for (i = 0; i < p->num_recv_buffs; i++) {
867 rfd[i].next = make16(rfd + (i + 1) % p->num_recv_buffs);
869 rfd[p->num_recv_buffs - 1].last = RFD_SUSP; /* RU suspend */
871 ptr = (void *) (rfd + p->num_recv_buffs);
873 rbd = (struct rbd_struct *) ptr;
874 ptr = (void *) (rbd + p->num_recv_buffs);
876 /* clr descriptors */
877 memset((char *) rbd, 0, sizeof(struct rbd_struct) * p->num_recv_buffs);
879 for (i = 0; i < p->num_recv_buffs; i++) {
880 rbd[i].next = make16((rbd + (i + 1) % p->num_recv_buffs));
881 rbd[i].size = RECV_BUFF_SIZE;
882 rbd[i].buffer = make24(ptr);
883 ptr = (char *) ptr + RECV_BUFF_SIZE;
886 p->rfd_top = p->rfd_first;
887 p->rfd_last = p->rfd_first + p->num_recv_buffs - 1;
889 p->scb->rfa_offset = make16(p->rfd_first);
890 p->rfd_first->rbd_offset = make16(rbd);
896 /**************************************************
897 * Interrupt Handler ...
901 elmc_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
903 struct net_device *dev = (struct net_device *) dev_id;
908 printk(KERN_ERR "elmc-interrupt: irq %d for unknown device.\n", (int) -(((struct pt_regs *) reg_ptr)->orig_eax + 2));
910 } else if (!netif_running(dev)) {
911 /* The 3c523 has this habit of generating interrupts during the
912 reset. I'm not sure if the ni52 has this same problem, but it's
913 really annoying if we haven't finished initializing it. I was
914 hoping all the elmc_id_* commands would disable this, but I
915 might have missed a few. */
917 elmc_id_attn586(); /* ack inter. and disable any more */
919 } else if (!(ELMC_CTRL_INT & inb(dev->base_addr + ELMC_CTRL))) {
920 /* wasn't this device */
923 /* reading ELMC_CTRL also clears the INT bit. */
925 p = (struct priv *) dev->priv;
927 while ((stat = p->scb->status & STAT_MASK))
930 elmc_attn586(); /* ack inter. */
932 if (stat & STAT_CX) {
933 /* command with I-bit set complete */
936 if (stat & STAT_FR) {
937 /* received a frame */
940 #ifndef NO_NOPCOMMANDS
941 if (stat & STAT_CNA) {
942 /* CU went 'not ready' */
943 if (netif_running(dev)) {
944 printk(KERN_WARNING "%s: oops! CU has left active state. stat: %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
949 if (stat & STAT_RNR) {
950 /* RU went 'not ready' */
952 if (p->scb->status & RU_SUSPEND) {
953 /* special case: RU_SUSPEND */
956 p->scb->cmd = RUC_RESUME;
959 printk(KERN_WARNING "%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev->name, (int) stat, (int) p->scb->status);
963 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
964 if (p->scb->cmd) { /* timed out? */
971 /*******************************************************
975 static void elmc_rcv_int(struct net_device *dev)
978 unsigned short totlen;
980 struct rbd_struct *rbd;
981 struct priv *p = (struct priv *) dev->priv;
983 for (; (status = p->rfd_top->status) & STAT_COMPL;) {
984 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
986 if (status & STAT_OK) { /* frame received without error? */
987 if ((totlen = rbd->status) & RBD_LAST) { /* the first and the last buffer? */
988 totlen &= RBD_MASK; /* length of this frame */
990 skb = (struct sk_buff *) dev_alloc_skb(totlen + 2);
993 skb_reserve(skb, 2); /* 16 byte alignment */
995 eth_copy_and_sum(skb, (char *) p->base+(unsigned long) rbd->buffer,totlen,0);
996 skb->protocol = eth_type_trans(skb, dev);
998 dev->last_rx = jiffies;
999 p->stats.rx_packets++;
1000 p->stats.rx_bytes += totlen;
1002 p->stats.rx_dropped++;
1005 printk(KERN_WARNING "%s: received oversized frame.\n", dev->name);
1006 p->stats.rx_dropped++;
1008 } else { /* frame !(ok), only with 'save-bad-frames' */
1009 printk(KERN_WARNING "%s: oops! rfd-error-status: %04x\n", dev->name, status);
1010 p->stats.rx_errors++;
1012 p->rfd_top->status = 0;
1013 p->rfd_top->last = RFD_SUSP;
1014 p->rfd_last->last = 0; /* delete RU_SUSP */
1015 p->rfd_last = p->rfd_top;
1016 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
1020 /**********************************************************
1021 * handle 'Receiver went not ready'.
1024 static void elmc_rnr_int(struct net_device *dev)
1026 struct priv *p = (struct priv *) dev->priv;
1028 p->stats.rx_errors++;
1030 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1031 p->scb->cmd = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
1033 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1035 alloc_rfa(dev, (char *) p->rfd_first);
1036 startrecv586(dev); /* restart RU */
1038 printk(KERN_WARNING "%s: Receive-Unit restarted. Status: %04x\n", dev->name, p->scb->status);
1042 /**********************************************************
1043 * handle xmit - interrupt
1046 static void elmc_xmt_int(struct net_device *dev)
1049 struct priv *p = (struct priv *) dev->priv;
1051 status = p->xmit_cmds[p->xmit_last]->cmd_status;
1052 if (!(status & STAT_COMPL)) {
1053 printk(KERN_WARNING "%s: strange .. xmit-int without a 'COMPLETE'\n", dev->name);
1055 if (status & STAT_OK) {
1056 p->stats.tx_packets++;
1057 p->stats.collisions += (status & TCMD_MAXCOLLMASK);
1059 p->stats.tx_errors++;
1060 if (status & TCMD_LATECOLL) {
1061 printk(KERN_WARNING "%s: late collision detected.\n", dev->name);
1062 p->stats.collisions++;
1063 } else if (status & TCMD_NOCARRIER) {
1064 p->stats.tx_carrier_errors++;
1065 printk(KERN_WARNING "%s: no carrier detected.\n", dev->name);
1066 } else if (status & TCMD_LOSTCTS) {
1067 printk(KERN_WARNING "%s: loss of CTS detected.\n", dev->name);
1068 } else if (status & TCMD_UNDERRUN) {
1069 p->stats.tx_fifo_errors++;
1070 printk(KERN_WARNING "%s: DMA underrun detected.\n", dev->name);
1071 } else if (status & TCMD_MAXCOLL) {
1072 printk(KERN_WARNING "%s: Max. collisions exceeded.\n", dev->name);
1073 p->stats.collisions += 16;
1077 #if (NUM_XMIT_BUFFS != 1)
1078 if ((++p->xmit_last) == NUM_XMIT_BUFFS) {
1083 netif_wake_queue(dev);
1086 /***********************************************************
1087 * (re)start the receiver
1090 static void startrecv586(struct net_device *dev)
1092 struct priv *p = (struct priv *) dev->priv;
1094 p->scb->rfa_offset = make16(p->rfd_first);
1095 p->scb->cmd = RUC_START;
1096 elmc_attn586(); /* start cmd. */
1097 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1100 /******************************************************
1104 static void elmc_timeout(struct net_device *dev)
1106 struct priv *p = (struct priv *) dev->priv;
1107 /* COMMAND-UNIT active? */
1108 if (p->scb->status & CU_ACTIVE) {
1110 printk("%s: strange ... timeout with CU active?!?\n", dev->name);
1111 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);
1113 p->scb->cmd = CUC_ABORT;
1116 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
1117 p->scb->cmd = CUC_START;
1120 netif_wake_queue(dev);
1123 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev->name, p->scb->status);
1124 printk("%s: command-stats: %04x %04x\n", dev->name, p->xmit_cmds[0]->cmd_status, p->xmit_cmds[1]->cmd_status);
1131 /******************************************************
1135 static int elmc_send_packet(struct sk_buff *skb, struct net_device *dev)
1139 #ifndef NO_NOPCOMMANDS
1142 struct priv *p = (struct priv *) dev->priv;
1144 netif_stop_queue(dev);
1146 len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
1148 if (len != skb->len)
1149 memset((char *) p->xmit_cbuffs[p->xmit_count], 0, ETH_ZLEN);
1150 memcpy((char *) p->xmit_cbuffs[p->xmit_count], (char *) (skb->data), skb->len);
1152 #if (NUM_XMIT_BUFFS == 1)
1153 #ifdef NO_NOPCOMMANDS
1154 p->xmit_buffs[0]->size = TBD_LAST | len;
1155 for (i = 0; i < 16; i++) {
1156 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1157 p->scb->cmd = CUC_START;
1158 p->xmit_cmds[0]->cmd_status = 0;
1160 dev->trans_start = jiffies;
1165 if ((p->scb->status & CU_ACTIVE)) { /* test it, because CU sometimes doesn't start immediately */
1168 if (p->xmit_cmds[0]->cmd_status) {
1172 printk(KERN_WARNING "%s: Can't start transmit-command.\n", dev->name);
1176 next_nop = (p->nop_point + 1) & 0x1;
1177 p->xmit_buffs[0]->size = TBD_LAST | len;
1179 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1180 = make16((p->nop_cmds[next_nop]));
1181 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1183 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1184 dev->trans_start = jiffies;
1185 p->nop_point = next_nop;
1189 p->xmit_buffs[p->xmit_count]->size = TBD_LAST | len;
1190 if ((next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS) {
1193 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1194 p->xmit_cmds[p->xmit_count]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1195 = make16((p->nop_cmds[next_nop]));
1196 p->nop_cmds[next_nop]->cmd_status = 0;
1197 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1198 dev->trans_start = jiffies;
1199 p->xmit_count = next_nop;
1200 if (p->xmit_count != p->xmit_last)
1201 netif_wake_queue(dev);
1207 /*******************************************
1208 * Someone wanna have the statistics
1211 static struct net_device_stats *elmc_get_stats(struct net_device *dev)
1213 struct priv *p = (struct priv *) dev->priv;
1214 unsigned short crc, aln, rsc, ovrn;
1216 crc = p->scb->crc_errs; /* get error-statistic from the ni82586 */
1217 p->scb->crc_errs -= crc;
1218 aln = p->scb->aln_errs;
1219 p->scb->aln_errs -= aln;
1220 rsc = p->scb->rsc_errs;
1221 p->scb->rsc_errs -= rsc;
1222 ovrn = p->scb->ovrn_errs;
1223 p->scb->ovrn_errs -= ovrn;
1225 p->stats.rx_crc_errors += crc;
1226 p->stats.rx_fifo_errors += ovrn;
1227 p->stats.rx_frame_errors += aln;
1228 p->stats.rx_dropped += rsc;
1233 /********************************************************
1237 #ifdef ELMC_MULTICAST
1238 static void set_multicast_list(struct net_device *dev)
1241 /* without a running interface, promiscuous doesn't work */
1252 static void netdev_get_drvinfo(struct net_device *dev,
1253 struct ethtool_drvinfo *info)
1255 strcpy(info->driver, DRV_NAME);
1256 strcpy(info->version, DRV_VERSION);
1257 sprintf(info->bus_info, "MCA 0x%lx", dev->base_addr);
1260 static struct ethtool_ops netdev_ethtool_ops = {
1261 .get_drvinfo = netdev_get_drvinfo,
1266 /* Increase if needed ;) */
1267 #define MAX_3C523_CARDS 4
1269 static struct net_device *dev_elmc[MAX_3C523_CARDS];
1270 static int irq[MAX_3C523_CARDS];
1271 static int io[MAX_3C523_CARDS];
1272 MODULE_PARM(irq, "1-" __MODULE_STRING(MAX_3C523_CARDS) "i");
1273 MODULE_PARM(io, "1-" __MODULE_STRING(MAX_3C523_CARDS) "i");
1274 MODULE_PARM_DESC(io, "EtherLink/MC I/O base address(es)");
1275 MODULE_PARM_DESC(irq, "EtherLink/MC IRQ number(s)");
1277 int init_module(void)
1279 int this_dev,found = 0;
1281 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1282 for(this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1283 struct net_device *dev = alloc_etherdev(sizeof(struct priv));
1286 dev->irq=irq[this_dev];
1287 dev->base_addr=io[this_dev];
1288 if (do_elmc_probe(dev) == 0) {
1289 if (register_netdev(dev) == 0) {
1290 dev_elmc[this_dev] = dev;
1297 if (io[this_dev]==0)
1299 printk(KERN_WARNING "3c523.c: No 3c523 card found at io=%#x\n",io[this_dev]);
1303 if(io[0]==0) printk(KERN_NOTICE "3c523.c: No 3c523 cards found\n");
1308 void cleanup_module(void)
1311 for (this_dev=0; this_dev<MAX_3C523_CARDS; this_dev++) {
1312 struct net_device *dev = dev_elmc[this_dev];
1314 unregister_netdev(dev);