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
);
205 struct net_device_stats stats
;
208 unsigned long mapped_start
; /* Start of ioremap */
209 volatile struct rfd_struct
*rfd_last
, *rfd_top
, *rfd_first
;
210 volatile struct scp_struct
*scp
; /* volatile is important */
211 volatile struct iscp_struct
*iscp
; /* volatile is important */
212 volatile struct scb_struct
*scb
; /* volatile is important */
213 volatile struct tbd_struct
*xmit_buffs
[NUM_XMIT_BUFFS
];
214 #if (NUM_XMIT_BUFFS == 1)
215 volatile struct transmit_cmd_struct
*xmit_cmds
[2];
216 volatile struct nop_cmd_struct
*nop_cmds
[2];
218 volatile struct transmit_cmd_struct
*xmit_cmds
[NUM_XMIT_BUFFS
];
219 volatile struct nop_cmd_struct
*nop_cmds
[NUM_XMIT_BUFFS
];
221 volatile int nop_point
, num_recv_buffs
;
222 volatile char *xmit_cbuffs
[NUM_XMIT_BUFFS
];
223 volatile int xmit_count
, xmit_last
;
227 #define elmc_attn586() {elmc_do_attn586(dev->base_addr,ELMC_CTRL_INTE);}
228 #define elmc_reset586() {elmc_do_reset586(dev->base_addr,ELMC_CTRL_INTE);}
230 /* with interrupts disabled - this will clear the interrupt bit in the
231 3c523 control register, and won't put it back. This effectively
232 disables interrupts on the card. */
233 #define elmc_id_attn586() {elmc_do_attn586(dev->base_addr,0);}
234 #define elmc_id_reset586() {elmc_do_reset586(dev->base_addr,0);}
236 /*************************************************************************/
238 Do a Channel Attention on the 3c523. This is extremely board dependent.
240 static void elmc_do_attn586(int ioaddr
, int ints
)
242 /* the 3c523 requires a minimum of 500 ns. The delays here might be
243 a little too large, and hence they may cut the performance of the
244 card slightly. If someone who knows a little more about Linux
245 timing would care to play with these, I'd appreciate it. */
247 /* this bit masking stuff is crap. I'd rather have separate
248 registers with strobe triggers for each of these functions. <sigh>
249 Ya take what ya got. */
251 outb(ELMC_CTRL_RST
| 0x3 | ELMC_CTRL_CA
| ints
, ioaddr
+ ELMC_CTRL
);
252 DELAY_16(); /* > 500 ns */
253 outb(ELMC_CTRL_RST
| 0x3 | ints
, ioaddr
+ ELMC_CTRL
);
256 /*************************************************************************/
258 Reset the 82586 on the 3c523. Also very board dependent.
260 static void elmc_do_reset586(int ioaddr
, int ints
)
262 /* toggle the RST bit low then high */
263 outb(0x3 | ELMC_CTRL_LBK
, ioaddr
+ ELMC_CTRL
);
264 DELAY_16(); /* > 500 ns */
265 outb(ELMC_CTRL_RST
| ELMC_CTRL_LBK
| 0x3, ioaddr
+ ELMC_CTRL
);
267 elmc_do_attn586(ioaddr
, ints
);
270 /**********************************************
274 static int elmc_close(struct net_device
*dev
)
276 netif_stop_queue(dev
);
277 elmc_id_reset586(); /* the hard way to stop the receiver */
278 free_irq(dev
->irq
, dev
);
282 /**********************************************
286 static int elmc_open(struct net_device
*dev
)
290 elmc_id_attn586(); /* disable interrupts */
292 ret
= request_irq(dev
->irq
, &elmc_interrupt
, IRQF_SHARED
| IRQF_SAMPLE_RANDOM
,
295 printk(KERN_ERR
"%s: couldn't get irq %d\n", dev
->name
, dev
->irq
);
302 netif_start_queue(dev
);
303 return 0; /* most done by init */
306 /**********************************************
307 * Check to see if there's an 82586 out there.
310 static int __init
check586(struct net_device
*dev
, unsigned long where
, unsigned size
)
312 struct priv
*p
= (struct priv
*) dev
->priv
;
316 p
->base
= (unsigned long) isa_bus_to_virt((unsigned long)where
) + size
- 0x01000000;
317 p
->memtop
= isa_bus_to_virt((unsigned long)where
) + size
;
318 p
->scp
= (struct scp_struct
*)(p
->base
+ SCP_DEFAULT_ADDRESS
);
319 memset((char *) p
->scp
, 0, sizeof(struct scp_struct
));
320 p
->scp
->sysbus
= SYSBUSVAL
; /* 1 = 8Bit-Bus, 0 = 16 Bit */
322 iscp_addrs
[0] = isa_bus_to_virt((unsigned long)where
);
323 iscp_addrs
[1] = (char *) p
->scp
- sizeof(struct iscp_struct
);
325 for (i
= 0; i
< 2; i
++) {
326 p
->iscp
= (struct iscp_struct
*) iscp_addrs
[i
];
327 memset((char *) p
->iscp
, 0, sizeof(struct iscp_struct
));
329 p
->scp
->iscp
= make24(p
->iscp
);
334 /* reset586 does an implicit CA */
336 /* apparently, you sometimes have to kick the 82586 twice... */
340 if (p
->iscp
->busy
) { /* i82586 clears 'busy' after successful init */
347 /******************************************************************
348 * set iscp at the right place, called by elmc_probe and open586.
351 void alloc586(struct net_device
*dev
)
353 struct priv
*p
= (struct priv
*) dev
->priv
;
358 p
->scp
= (struct scp_struct
*) (p
->base
+ SCP_DEFAULT_ADDRESS
);
359 p
->scb
= (struct scb_struct
*) isa_bus_to_virt(dev
->mem_start
);
360 p
->iscp
= (struct iscp_struct
*) ((char *) p
->scp
- sizeof(struct iscp_struct
));
362 memset((char *) p
->iscp
, 0, sizeof(struct iscp_struct
));
363 memset((char *) p
->scp
, 0, sizeof(struct scp_struct
));
365 p
->scp
->iscp
= make24(p
->iscp
);
366 p
->scp
->sysbus
= SYSBUSVAL
;
367 p
->iscp
->scb_offset
= make16(p
->scb
);
376 printk(KERN_ERR
"%s: Init-Problems (alloc).\n", dev
->name
);
378 memset((char *) p
->scb
, 0, sizeof(struct scb_struct
));
381 /*****************************************************************/
383 static int elmc_getinfo(char *buf
, int slot
, void *d
)
386 struct net_device
*dev
= (struct net_device
*) d
;
392 len
+= sprintf(buf
+ len
, "Revision: 0x%x\n",
393 inb(dev
->base_addr
+ ELMC_REVISION
) & 0xf);
394 len
+= sprintf(buf
+ len
, "IRQ: %d\n", dev
->irq
);
395 len
+= sprintf(buf
+ len
, "IO Address: %#lx-%#lx\n", dev
->base_addr
,
396 dev
->base_addr
+ ELMC_IO_EXTENT
);
397 len
+= sprintf(buf
+ len
, "Memory: %#lx-%#lx\n", dev
->mem_start
,
399 len
+= sprintf(buf
+ len
, "Transceiver: %s\n", dev
->if_port
?
400 "External" : "Internal");
401 len
+= sprintf(buf
+ len
, "Device: %s\n", dev
->name
);
402 len
+= sprintf(buf
+ len
, "Hardware Address:");
403 for (i
= 0; i
< 6; i
++) {
404 len
+= sprintf(buf
+ len
, " %02x", dev
->dev_addr
[i
]);
410 } /* elmc_getinfo() */
412 /*****************************************************************/
414 static int __init
do_elmc_probe(struct net_device
*dev
)
417 int base_addr
= dev
->base_addr
;
422 unsigned int size
= 0;
424 struct priv
*pr
= dev
->priv
;
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 */
575 retval
= register_netdev(dev
);
581 mca_set_adapter_procfn(slot
, NULL
, NULL
);
582 release_region(dev
->base_addr
, ELMC_IO_EXTENT
);
586 static void cleanup_card(struct net_device
*dev
)
588 mca_set_adapter_procfn(((struct priv
*) (dev
->priv
))->slot
, NULL
, NULL
);
589 release_region(dev
->base_addr
, ELMC_IO_EXTENT
);
593 struct net_device
* __init
elmc_probe(int unit
)
595 struct net_device
*dev
= alloc_etherdev(sizeof(struct priv
));
599 return ERR_PTR(-ENOMEM
);
601 sprintf(dev
->name
, "eth%d", unit
);
602 netdev_boot_setup_check(dev
);
604 err
= do_elmc_probe(dev
);
614 /**********************************************
615 * init the chip (elmc-interrupt should be disabled?!)
616 * needs a correct 'allocated' memory
619 static int init586(struct net_device
*dev
)
624 struct priv
*p
= (struct priv
*) dev
->priv
;
625 volatile struct configure_cmd_struct
*cfg_cmd
;
626 volatile struct iasetup_cmd_struct
*ias_cmd
;
627 volatile struct tdr_cmd_struct
*tdr_cmd
;
628 volatile struct mcsetup_cmd_struct
*mc_cmd
;
629 struct dev_mc_list
*dmi
= dev
->mc_list
;
630 int num_addrs
= dev
->mc_count
;
632 ptr
= (void *) ((char *) p
->scb
+ sizeof(struct scb_struct
));
634 cfg_cmd
= (struct configure_cmd_struct
*) ptr
; /* configure-command */
635 cfg_cmd
->cmd_status
= 0;
636 cfg_cmd
->cmd_cmd
= CMD_CONFIGURE
| CMD_LAST
;
637 cfg_cmd
->cmd_link
= 0xffff;
639 cfg_cmd
->byte_cnt
= 0x0a; /* number of cfg bytes */
640 cfg_cmd
->fifo
= 0x08; /* fifo-limit (8=tx:32/rx:64) */
641 cfg_cmd
->sav_bf
= 0x40; /* hold or discard bad recv frames (bit 7) */
642 cfg_cmd
->adr_len
= 0x2e; /* addr_len |!src_insert |pre-len |loopback */
643 cfg_cmd
->priority
= 0x00;
645 cfg_cmd
->time_low
= 0x00;
646 cfg_cmd
->time_high
= 0xf2;
647 cfg_cmd
->promisc
= 0;
648 if (dev
->flags
& (IFF_ALLMULTI
| IFF_PROMISC
)) {
649 cfg_cmd
->promisc
= 1;
650 dev
->flags
|= IFF_PROMISC
;
652 cfg_cmd
->carr_coll
= 0x00;
654 p
->scb
->cbl_offset
= make16(cfg_cmd
);
656 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
659 s
= jiffies
; /* warning: only active with interrupts on !! */
660 while (!(cfg_cmd
->cmd_status
& STAT_COMPL
)) {
661 if (time_after(jiffies
, s
+ 30*HZ
/100))
665 if ((cfg_cmd
->cmd_status
& (STAT_OK
| STAT_COMPL
)) != (STAT_COMPL
| STAT_OK
)) {
666 printk(KERN_WARNING
"%s (elmc): configure command failed: %x\n", dev
->name
, cfg_cmd
->cmd_status
);
670 * individual address setup
672 ias_cmd
= (struct iasetup_cmd_struct
*) ptr
;
674 ias_cmd
->cmd_status
= 0;
675 ias_cmd
->cmd_cmd
= CMD_IASETUP
| CMD_LAST
;
676 ias_cmd
->cmd_link
= 0xffff;
678 memcpy((char *) &ias_cmd
->iaddr
, (char *) dev
->dev_addr
, ETH_ALEN
);
680 p
->scb
->cbl_offset
= make16(ias_cmd
);
682 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
686 while (!(ias_cmd
->cmd_status
& STAT_COMPL
)) {
687 if (time_after(jiffies
, s
+ 30*HZ
/100))
691 if ((ias_cmd
->cmd_status
& (STAT_OK
| STAT_COMPL
)) != (STAT_OK
| STAT_COMPL
)) {
692 printk(KERN_WARNING
"%s (elmc): individual address setup command failed: %04x\n", dev
->name
, ias_cmd
->cmd_status
);
696 * TDR, wire check .. e.g. no resistor e.t.c
698 tdr_cmd
= (struct tdr_cmd_struct
*) ptr
;
700 tdr_cmd
->cmd_status
= 0;
701 tdr_cmd
->cmd_cmd
= CMD_TDR
| CMD_LAST
;
702 tdr_cmd
->cmd_link
= 0xffff;
705 p
->scb
->cbl_offset
= make16(tdr_cmd
);
707 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
711 while (!(tdr_cmd
->cmd_status
& STAT_COMPL
)) {
712 if (time_after(jiffies
, s
+ 30*HZ
/100)) {
713 printk(KERN_WARNING
"%s: %d Problems while running the TDR.\n", dev
->name
, __LINE__
);
720 DELAY(2); /* wait for result */
721 result
= tdr_cmd
->status
;
723 p
->scb
->cmd
= p
->scb
->status
& STAT_MASK
;
724 elmc_id_attn586(); /* ack the interrupts */
726 if (result
& TDR_LNK_OK
) {
728 } else if (result
& TDR_XCVR_PRB
) {
729 printk(KERN_WARNING
"%s: TDR: Transceiver problem!\n", dev
->name
);
730 } else if (result
& TDR_ET_OPN
) {
731 printk(KERN_WARNING
"%s: TDR: No correct termination %d clocks away.\n", dev
->name
, result
& TDR_TIMEMASK
);
732 } else if (result
& TDR_ET_SRT
) {
733 if (result
& TDR_TIMEMASK
) /* time == 0 -> strange :-) */
734 printk(KERN_WARNING
"%s: TDR: Detected a short circuit %d clocks away.\n", dev
->name
, result
& TDR_TIMEMASK
);
736 printk(KERN_WARNING
"%s: TDR: Unknown status %04x\n", dev
->name
, result
);
742 p
->scb
->cmd
= p
->scb
->status
& STAT_MASK
;
746 * alloc nop/xmit-cmds
748 #if (NUM_XMIT_BUFFS == 1)
749 for (i
= 0; i
< 2; i
++) {
750 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*) ptr
;
751 p
->nop_cmds
[i
]->cmd_cmd
= CMD_NOP
;
752 p
->nop_cmds
[i
]->cmd_status
= 0;
753 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
754 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
756 p
->xmit_cmds
[0] = (struct transmit_cmd_struct
*) ptr
; /* transmit cmd/buff 0 */
757 ptr
= (char *) ptr
+ sizeof(struct transmit_cmd_struct
);
759 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
760 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*) ptr
;
761 p
->nop_cmds
[i
]->cmd_cmd
= CMD_NOP
;
762 p
->nop_cmds
[i
]->cmd_status
= 0;
763 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
764 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
765 p
->xmit_cmds
[i
] = (struct transmit_cmd_struct
*) ptr
; /*transmit cmd/buff 0 */
766 ptr
= (char *) ptr
+ sizeof(struct transmit_cmd_struct
);
770 ptr
= alloc_rfa(dev
, (void *) ptr
); /* init receive-frame-area */
777 /* I don't understand this: do we really need memory after the init? */
778 int len
= ((char *) p
->iscp
- (char *) ptr
- 8) / 6;
780 printk(KERN_ERR
"%s: Ooooops, no memory for MC-Setup!\n", dev
->name
);
782 if (len
< num_addrs
) {
784 printk(KERN_WARNING
"%s: Sorry, can only apply %d MC-Address(es).\n",
785 dev
->name
, num_addrs
);
787 mc_cmd
= (struct mcsetup_cmd_struct
*) ptr
;
788 mc_cmd
->cmd_status
= 0;
789 mc_cmd
->cmd_cmd
= CMD_MCSETUP
| CMD_LAST
;
790 mc_cmd
->cmd_link
= 0xffff;
791 mc_cmd
->mc_cnt
= num_addrs
* 6;
792 for (i
= 0; i
< num_addrs
; i
++) {
793 memcpy((char *) mc_cmd
->mc_list
[i
], dmi
->dmi_addr
, 6);
796 p
->scb
->cbl_offset
= make16(mc_cmd
);
797 p
->scb
->cmd
= CUC_START
;
800 while (!(mc_cmd
->cmd_status
& STAT_COMPL
)) {
801 if (time_after(jiffies
, s
+ 30*HZ
/100))
804 if (!(mc_cmd
->cmd_status
& STAT_COMPL
)) {
805 printk(KERN_WARNING
"%s: Can't apply multicast-address-list.\n", dev
->name
);
810 * alloc xmit-buffs / init xmit_cmds
812 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
813 p
->xmit_cbuffs
[i
] = (char *) ptr
; /* char-buffs */
814 ptr
= (char *) ptr
+ XMIT_BUFF_SIZE
;
815 p
->xmit_buffs
[i
] = (struct tbd_struct
*) ptr
; /* TBD */
816 ptr
= (char *) ptr
+ sizeof(struct tbd_struct
);
817 if ((void *) ptr
> (void *) p
->iscp
) {
818 printk(KERN_ERR
"%s: not enough shared-mem for your configuration!\n", dev
->name
);
821 memset((char *) (p
->xmit_cmds
[i
]), 0, sizeof(struct transmit_cmd_struct
));
822 memset((char *) (p
->xmit_buffs
[i
]), 0, sizeof(struct tbd_struct
));
823 p
->xmit_cmds
[i
]->cmd_status
= STAT_COMPL
;
824 p
->xmit_cmds
[i
]->cmd_cmd
= CMD_XMIT
| CMD_INT
;
825 p
->xmit_cmds
[i
]->tbd_offset
= make16((p
->xmit_buffs
[i
]));
826 p
->xmit_buffs
[i
]->next
= 0xffff;
827 p
->xmit_buffs
[i
]->buffer
= make24((p
->xmit_cbuffs
[i
]));
832 #ifndef NO_NOPCOMMANDS
837 * 'start transmitter' (nop-loop)
839 #ifndef NO_NOPCOMMANDS
840 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[0]);
841 p
->scb
->cmd
= CUC_START
;
845 p
->xmit_cmds
[0]->cmd_link
= 0xffff;
846 p
->xmit_cmds
[0]->cmd_cmd
= CMD_XMIT
| CMD_LAST
| CMD_INT
;
852 /******************************************************
853 * This is a helper routine for elmc_rnr_int() and init586().
854 * It sets up the Receive Frame Area (RFA).
857 static void *alloc_rfa(struct net_device
*dev
, void *ptr
)
859 volatile struct rfd_struct
*rfd
= (struct rfd_struct
*) ptr
;
860 volatile struct rbd_struct
*rbd
;
862 struct priv
*p
= (struct priv
*) dev
->priv
;
864 memset((char *) rfd
, 0, sizeof(struct rfd_struct
) * p
->num_recv_buffs
);
867 for (i
= 0; i
< p
->num_recv_buffs
; i
++) {
868 rfd
[i
].next
= make16(rfd
+ (i
+ 1) % p
->num_recv_buffs
);
870 rfd
[p
->num_recv_buffs
- 1].last
= RFD_SUSP
; /* RU suspend */
872 ptr
= (void *) (rfd
+ p
->num_recv_buffs
);
874 rbd
= (struct rbd_struct
*) ptr
;
875 ptr
= (void *) (rbd
+ p
->num_recv_buffs
);
877 /* clr descriptors */
878 memset((char *) rbd
, 0, sizeof(struct rbd_struct
) * p
->num_recv_buffs
);
880 for (i
= 0; i
< p
->num_recv_buffs
; i
++) {
881 rbd
[i
].next
= make16((rbd
+ (i
+ 1) % p
->num_recv_buffs
));
882 rbd
[i
].size
= RECV_BUFF_SIZE
;
883 rbd
[i
].buffer
= make24(ptr
);
884 ptr
= (char *) ptr
+ RECV_BUFF_SIZE
;
887 p
->rfd_top
= p
->rfd_first
;
888 p
->rfd_last
= p
->rfd_first
+ p
->num_recv_buffs
- 1;
890 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
891 p
->rfd_first
->rbd_offset
= make16(rbd
);
897 /**************************************************
898 * Interrupt Handler ...
902 elmc_interrupt(int irq
, void *dev_id
)
904 struct net_device
*dev
= dev_id
;
908 if (!netif_running(dev
)) {
909 /* The 3c523 has this habit of generating interrupts during the
910 reset. I'm not sure if the ni52 has this same problem, but it's
911 really annoying if we haven't finished initializing it. I was
912 hoping all the elmc_id_* commands would disable this, but I
913 might have missed a few. */
915 elmc_id_attn586(); /* ack inter. and disable any more */
917 } else if (!(ELMC_CTRL_INT
& inb(dev
->base_addr
+ ELMC_CTRL
))) {
918 /* wasn't this device */
921 /* reading ELMC_CTRL also clears the INT bit. */
923 p
= (struct priv
*) dev
->priv
;
925 while ((stat
= p
->scb
->status
& STAT_MASK
))
928 elmc_attn586(); /* ack inter. */
930 if (stat
& STAT_CX
) {
931 /* command with I-bit set complete */
934 if (stat
& STAT_FR
) {
935 /* received a frame */
938 #ifndef NO_NOPCOMMANDS
939 if (stat
& STAT_CNA
) {
940 /* CU went 'not ready' */
941 if (netif_running(dev
)) {
942 printk(KERN_WARNING
"%s: oops! CU has left active state. stat: %04x/%04x.\n", dev
->name
, (int) stat
, (int) p
->scb
->status
);
947 if (stat
& STAT_RNR
) {
948 /* RU went 'not ready' */
950 if (p
->scb
->status
& RU_SUSPEND
) {
951 /* special case: RU_SUSPEND */
954 p
->scb
->cmd
= RUC_RESUME
;
957 printk(KERN_WARNING
"%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev
->name
, (int) stat
, (int) p
->scb
->status
);
961 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
962 if (p
->scb
->cmd
) { /* timed out? */
969 /*******************************************************
973 static void elmc_rcv_int(struct net_device
*dev
)
976 unsigned short totlen
;
978 struct rbd_struct
*rbd
;
979 struct priv
*p
= (struct priv
*) dev
->priv
;
981 for (; (status
= p
->rfd_top
->status
) & STAT_COMPL
;) {
982 rbd
= (struct rbd_struct
*) make32(p
->rfd_top
->rbd_offset
);
984 if (status
& STAT_OK
) { /* frame received without error? */
985 if ((totlen
= rbd
->status
) & RBD_LAST
) { /* the first and the last buffer? */
986 totlen
&= RBD_MASK
; /* length of this frame */
988 skb
= (struct sk_buff
*) dev_alloc_skb(totlen
+ 2);
990 skb_reserve(skb
, 2); /* 16 byte alignment */
992 skb_copy_to_linear_data(skb
, (char *) p
->base
+(unsigned long) rbd
->buffer
,totlen
);
993 skb
->protocol
= eth_type_trans(skb
, dev
);
995 dev
->last_rx
= jiffies
;
996 p
->stats
.rx_packets
++;
997 p
->stats
.rx_bytes
+= totlen
;
999 p
->stats
.rx_dropped
++;
1002 printk(KERN_WARNING
"%s: received oversized frame.\n", dev
->name
);
1003 p
->stats
.rx_dropped
++;
1005 } else { /* frame !(ok), only with 'save-bad-frames' */
1006 printk(KERN_WARNING
"%s: oops! rfd-error-status: %04x\n", dev
->name
, status
);
1007 p
->stats
.rx_errors
++;
1009 p
->rfd_top
->status
= 0;
1010 p
->rfd_top
->last
= RFD_SUSP
;
1011 p
->rfd_last
->last
= 0; /* delete RU_SUSP */
1012 p
->rfd_last
= p
->rfd_top
;
1013 p
->rfd_top
= (struct rfd_struct
*) make32(p
->rfd_top
->next
); /* step to next RFD */
1017 /**********************************************************
1018 * handle 'Receiver went not ready'.
1021 static void elmc_rnr_int(struct net_device
*dev
)
1023 struct priv
*p
= (struct priv
*) dev
->priv
;
1025 p
->stats
.rx_errors
++;
1027 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1028 p
->scb
->cmd
= RUC_ABORT
; /* usually the RU is in the 'no resource'-state .. abort it now. */
1030 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1032 alloc_rfa(dev
, (char *) p
->rfd_first
);
1033 startrecv586(dev
); /* restart RU */
1035 printk(KERN_WARNING
"%s: Receive-Unit restarted. Status: %04x\n", dev
->name
, p
->scb
->status
);
1039 /**********************************************************
1040 * handle xmit - interrupt
1043 static void elmc_xmt_int(struct net_device
*dev
)
1046 struct priv
*p
= (struct priv
*) dev
->priv
;
1048 status
= p
->xmit_cmds
[p
->xmit_last
]->cmd_status
;
1049 if (!(status
& STAT_COMPL
)) {
1050 printk(KERN_WARNING
"%s: strange .. xmit-int without a 'COMPLETE'\n", dev
->name
);
1052 if (status
& STAT_OK
) {
1053 p
->stats
.tx_packets
++;
1054 p
->stats
.collisions
+= (status
& TCMD_MAXCOLLMASK
);
1056 p
->stats
.tx_errors
++;
1057 if (status
& TCMD_LATECOLL
) {
1058 printk(KERN_WARNING
"%s: late collision detected.\n", dev
->name
);
1059 p
->stats
.collisions
++;
1060 } else if (status
& TCMD_NOCARRIER
) {
1061 p
->stats
.tx_carrier_errors
++;
1062 printk(KERN_WARNING
"%s: no carrier detected.\n", dev
->name
);
1063 } else if (status
& TCMD_LOSTCTS
) {
1064 printk(KERN_WARNING
"%s: loss of CTS detected.\n", dev
->name
);
1065 } else if (status
& TCMD_UNDERRUN
) {
1066 p
->stats
.tx_fifo_errors
++;
1067 printk(KERN_WARNING
"%s: DMA underrun detected.\n", dev
->name
);
1068 } else if (status
& TCMD_MAXCOLL
) {
1069 printk(KERN_WARNING
"%s: Max. collisions exceeded.\n", dev
->name
);
1070 p
->stats
.collisions
+= 16;
1074 #if (NUM_XMIT_BUFFS != 1)
1075 if ((++p
->xmit_last
) == NUM_XMIT_BUFFS
) {
1080 netif_wake_queue(dev
);
1083 /***********************************************************
1084 * (re)start the receiver
1087 static void startrecv586(struct net_device
*dev
)
1089 struct priv
*p
= (struct priv
*) dev
->priv
;
1091 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
1092 p
->scb
->cmd
= RUC_START
;
1093 elmc_attn586(); /* start cmd. */
1094 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1097 /******************************************************
1101 static void elmc_timeout(struct net_device
*dev
)
1103 struct priv
*p
= (struct priv
*) dev
->priv
;
1104 /* COMMAND-UNIT active? */
1105 if (p
->scb
->status
& CU_ACTIVE
) {
1107 printk("%s: strange ... timeout with CU active?!?\n", dev
->name
);
1108 printk("%s: X0: %04x N0: %04x N1: %04x %d\n", dev
->name
, (int) p
->xmit_cmds
[0]->cmd_status
, (int) p
->nop_cmds
[0]->cmd_status
, (int) p
->nop_cmds
[1]->cmd_status
, (int) p
->nop_point
);
1110 p
->scb
->cmd
= CUC_ABORT
;
1113 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[p
->nop_point
]);
1114 p
->scb
->cmd
= CUC_START
;
1117 netif_wake_queue(dev
);
1120 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev
->name
, p
->scb
->status
);
1121 printk("%s: command-stats: %04x %04x\n", dev
->name
, p
->xmit_cmds
[0]->cmd_status
, p
->xmit_cmds
[1]->cmd_status
);
1128 /******************************************************
1132 static int elmc_send_packet(struct sk_buff
*skb
, struct net_device
*dev
)
1136 #ifndef NO_NOPCOMMANDS
1139 struct priv
*p
= (struct priv
*) dev
->priv
;
1141 netif_stop_queue(dev
);
1143 len
= (ETH_ZLEN
< skb
->len
) ? skb
->len
: ETH_ZLEN
;
1145 if (len
!= skb
->len
)
1146 memset((char *) p
->xmit_cbuffs
[p
->xmit_count
], 0, ETH_ZLEN
);
1147 skb_copy_from_linear_data(skb
, (char *) p
->xmit_cbuffs
[p
->xmit_count
], skb
->len
);
1149 #if (NUM_XMIT_BUFFS == 1)
1150 #ifdef NO_NOPCOMMANDS
1151 p
->xmit_buffs
[0]->size
= TBD_LAST
| len
;
1152 for (i
= 0; i
< 16; i
++) {
1153 p
->scb
->cbl_offset
= make16(p
->xmit_cmds
[0]);
1154 p
->scb
->cmd
= CUC_START
;
1155 p
->xmit_cmds
[0]->cmd_status
= 0;
1157 dev
->trans_start
= jiffies
;
1162 if ((p
->scb
->status
& CU_ACTIVE
)) { /* test it, because CU sometimes doesn't start immediately */
1165 if (p
->xmit_cmds
[0]->cmd_status
) {
1169 printk(KERN_WARNING
"%s: Can't start transmit-command.\n", dev
->name
);
1173 next_nop
= (p
->nop_point
+ 1) & 0x1;
1174 p
->xmit_buffs
[0]->size
= TBD_LAST
| len
;
1176 p
->xmit_cmds
[0]->cmd_link
= p
->nop_cmds
[next_nop
]->cmd_link
1177 = make16((p
->nop_cmds
[next_nop
]));
1178 p
->xmit_cmds
[0]->cmd_status
= p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1180 p
->nop_cmds
[p
->nop_point
]->cmd_link
= make16((p
->xmit_cmds
[0]));
1181 dev
->trans_start
= jiffies
;
1182 p
->nop_point
= next_nop
;
1186 p
->xmit_buffs
[p
->xmit_count
]->size
= TBD_LAST
| len
;
1187 if ((next_nop
= p
->xmit_count
+ 1) == NUM_XMIT_BUFFS
) {
1190 p
->xmit_cmds
[p
->xmit_count
]->cmd_status
= 0;
1191 p
->xmit_cmds
[p
->xmit_count
]->cmd_link
= p
->nop_cmds
[next_nop
]->cmd_link
1192 = make16((p
->nop_cmds
[next_nop
]));
1193 p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1194 p
->nop_cmds
[p
->xmit_count
]->cmd_link
= make16((p
->xmit_cmds
[p
->xmit_count
]));
1195 dev
->trans_start
= jiffies
;
1196 p
->xmit_count
= next_nop
;
1197 if (p
->xmit_count
!= p
->xmit_last
)
1198 netif_wake_queue(dev
);
1204 /*******************************************
1205 * Someone wanna have the statistics
1208 static struct net_device_stats
*elmc_get_stats(struct net_device
*dev
)
1210 struct priv
*p
= (struct priv
*) dev
->priv
;
1211 unsigned short crc
, aln
, rsc
, ovrn
;
1213 crc
= p
->scb
->crc_errs
; /* get error-statistic from the ni82586 */
1214 p
->scb
->crc_errs
-= crc
;
1215 aln
= p
->scb
->aln_errs
;
1216 p
->scb
->aln_errs
-= aln
;
1217 rsc
= p
->scb
->rsc_errs
;
1218 p
->scb
->rsc_errs
-= rsc
;
1219 ovrn
= p
->scb
->ovrn_errs
;
1220 p
->scb
->ovrn_errs
-= ovrn
;
1222 p
->stats
.rx_crc_errors
+= crc
;
1223 p
->stats
.rx_fifo_errors
+= ovrn
;
1224 p
->stats
.rx_frame_errors
+= aln
;
1225 p
->stats
.rx_dropped
+= rsc
;
1230 /********************************************************
1234 #ifdef ELMC_MULTICAST
1235 static void set_multicast_list(struct net_device
*dev
)
1238 /* without a running interface, promiscuous doesn't work */
1249 static void netdev_get_drvinfo(struct net_device
*dev
,
1250 struct ethtool_drvinfo
*info
)
1252 strcpy(info
->driver
, DRV_NAME
);
1253 strcpy(info
->version
, DRV_VERSION
);
1254 sprintf(info
->bus_info
, "MCA 0x%lx", dev
->base_addr
);
1257 static const struct ethtool_ops netdev_ethtool_ops
= {
1258 .get_drvinfo
= netdev_get_drvinfo
,
1263 /* Increase if needed ;) */
1264 #define MAX_3C523_CARDS 4
1266 static struct net_device
*dev_elmc
[MAX_3C523_CARDS
];
1267 static int irq
[MAX_3C523_CARDS
];
1268 static int io
[MAX_3C523_CARDS
];
1269 module_param_array(irq
, int, NULL
, 0);
1270 module_param_array(io
, int, NULL
, 0);
1271 MODULE_PARM_DESC(io
, "EtherLink/MC I/O base address(es)");
1272 MODULE_PARM_DESC(irq
, "EtherLink/MC IRQ number(s)");
1273 MODULE_LICENSE("GPL");
1275 int __init
init_module(void)
1277 int this_dev
,found
= 0;
1279 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1280 for(this_dev
=0; this_dev
<MAX_3C523_CARDS
; this_dev
++) {
1281 struct net_device
*dev
= alloc_etherdev(sizeof(struct priv
));
1284 dev
->irq
=irq
[this_dev
];
1285 dev
->base_addr
=io
[this_dev
];
1286 if (do_elmc_probe(dev
) == 0) {
1287 dev_elmc
[this_dev
] = dev
;
1292 if (io
[this_dev
]==0)
1294 printk(KERN_WARNING
"3c523.c: No 3c523 card found at io=%#x\n",io
[this_dev
]);
1298 if(io
[0]==0) printk(KERN_NOTICE
"3c523.c: No 3c523 cards found\n");
1303 void __exit
cleanup_module(void)
1306 for (this_dev
=0; this_dev
<MAX_3C523_CARDS
; this_dev
++) {
1307 struct net_device
*dev
= dev_elmc
[this_dev
];
1309 unregister_netdev(dev
);