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
= (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
= 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 /*****************************************************************/
408 static int __init
do_elmc_probe(struct net_device
*dev
)
411 int base_addr
= dev
->base_addr
;
416 unsigned int size
= 0;
418 struct priv
*pr
= dev
->priv
;
423 /* search through the slots for the 3c523. */
424 slot
= mca_find_adapter(ELMC_MCA_ID
, 0);
426 status
= mca_read_stored_pos(slot
, 2);
428 dev
->irq
=irq_table
[(status
& ELMC_STATUS_IRQ_SELECT
) >> 6];
429 dev
->base_addr
=csr_table
[(status
& ELMC_STATUS_CSR_SELECT
) >> 1];
432 If we're trying to match a specified irq or IO address,
433 we'll reject a match unless it's what we're looking for.
434 Also reject it if the card is already in use.
437 if ((irq
&& irq
!= dev
->irq
) ||
438 (base_addr
&& base_addr
!= dev
->base_addr
)) {
439 slot
= mca_find_adapter(ELMC_MCA_ID
, slot
+ 1);
442 if (!request_region(dev
->base_addr
, ELMC_IO_EXTENT
, DRV_NAME
)) {
443 slot
= mca_find_adapter(ELMC_MCA_ID
, slot
+ 1);
447 /* found what we're looking for... */
451 /* we didn't find any 3c523 in the slots we checked for */
452 if (slot
== MCA_NOTFOUND
)
453 return ((base_addr
|| irq
) ? -ENXIO
: -ENODEV
);
455 mca_set_adapter_name(slot
, "3Com 3c523 Etherlink/MC");
456 mca_set_adapter_procfn(slot
, (MCA_ProcFn
) elmc_getinfo
, dev
);
458 /* if we get this far, adapter has been found - carry on */
459 printk(KERN_INFO
"%s: 3c523 adapter found in slot %d\n", dev
->name
, slot
+ 1);
461 /* Now we extract configuration info from the card.
462 The 3c523 provides information in two of the POS registers, but
463 the second one is only needed if we want to tell the card what IRQ
464 to use. I suspect that whoever sets the thing up initially would
465 prefer we don't screw with those things.
467 Note that we read the status info when we found the card...
469 See 3c523.h for more details.
472 /* revision is stored in the first 4 bits of the revision register */
473 revision
= inb(dev
->base_addr
+ ELMC_REVISION
) & 0xf;
475 /* according to docs, we read the interrupt and write it back to
476 the IRQ select register, since the POST might not configure the IRQ
480 mca_write_pos(slot
, 3, 0x04);
483 mca_write_pos(slot
, 3, 0x02);
486 mca_write_pos(slot
, 3, 0x08);
489 mca_write_pos(slot
, 3, 0x01);
493 memset(pr
, 0, sizeof(struct priv
));
496 printk(KERN_INFO
"%s: 3Com 3c523 Rev 0x%x at %#lx\n", dev
->name
, (int) revision
,
499 /* Determine if we're using the on-board transceiver (i.e. coax) or
500 an external one. The information is pretty much useless, but I
501 guess it's worth brownie points. */
502 dev
->if_port
= (status
& ELMC_STATUS_DISABLE_THIN
);
504 /* The 3c523 has a 24K chunk of memory. The first 16K is the
505 shared memory, while the last 8K is for the EtherStart BIOS ROM.
506 Which we don't care much about here. We'll just tell Linux that
507 we're using 16K. MCA won't permit address space conflicts caused
508 by not mapping the other 8K. */
509 dev
->mem_start
= shm_table
[(status
& ELMC_STATUS_MEMORY_SELECT
) >> 3];
511 /* We're using MCA, so it's a given that the information about memory
512 size is correct. The Crynwr drivers do something like this. */
514 elmc_id_reset586(); /* seems like a good idea before checking it... */
516 size
= 0x4000; /* check for 16K mem */
517 if (!check586(dev
, dev
->mem_start
, size
)) {
518 printk(KERN_ERR
"%s: memprobe, Can't find memory at 0x%lx!\n", dev
->name
,
523 dev
->mem_end
= dev
->mem_start
+ size
; /* set mem_end showed by 'ifconfig' */
525 pr
->memtop
= isa_bus_to_virt(dev
->mem_start
) + size
;
526 pr
->base
= (unsigned long) isa_bus_to_virt(dev
->mem_start
) + size
- 0x01000000;
529 elmc_id_reset586(); /* make sure it doesn't generate spurious ints */
531 /* set number of receive-buffs according to memsize */
532 pr
->num_recv_buffs
= NUM_RECV_BUFFS_16
;
534 /* dump all the assorted information */
535 printk(KERN_INFO
"%s: IRQ %d, %sternal xcvr, memory %#lx-%#lx.\n", dev
->name
,
536 dev
->irq
, dev
->if_port
? "ex" : "in",
537 dev
->mem_start
, dev
->mem_end
- 1);
539 /* The hardware address for the 3c523 is stored in the first six
540 bytes of the IO address. */
541 for (i
= 0; i
< 6; i
++)
542 dev
->dev_addr
[i
] = inb(dev
->base_addr
+ i
);
544 printk(KERN_INFO
"%s: hardware address %pM\n",
545 dev
->name
, dev
->dev_addr
);
547 dev
->open
= &elmc_open
;
548 dev
->stop
= &elmc_close
;
549 dev
->get_stats
= &elmc_get_stats
;
550 dev
->hard_start_xmit
= &elmc_send_packet
;
551 dev
->tx_timeout
= &elmc_timeout
;
552 dev
->watchdog_timeo
= HZ
;
553 #ifdef ELMC_MULTICAST
554 dev
->set_multicast_list
= &set_multicast_list
;
556 dev
->set_multicast_list
= NULL
;
558 dev
->ethtool_ops
= &netdev_ethtool_ops
;
560 /* note that we haven't actually requested the IRQ from the kernel.
561 That gets done in elmc_open(). I'm not sure that's such a good idea,
562 but it works, so I'll go with it. */
564 #ifndef ELMC_MULTICAST
565 dev
->flags
&=~IFF_MULTICAST
; /* Multicast doesn't work */
568 retval
= register_netdev(dev
);
574 mca_set_adapter_procfn(slot
, NULL
, NULL
);
575 release_region(dev
->base_addr
, ELMC_IO_EXTENT
);
579 static void cleanup_card(struct net_device
*dev
)
581 mca_set_adapter_procfn(((struct priv
*) (dev
->priv
))->slot
, NULL
, NULL
);
582 release_region(dev
->base_addr
, ELMC_IO_EXTENT
);
586 struct net_device
* __init
elmc_probe(int unit
)
588 struct net_device
*dev
= alloc_etherdev(sizeof(struct priv
));
592 return ERR_PTR(-ENOMEM
);
594 sprintf(dev
->name
, "eth%d", unit
);
595 netdev_boot_setup_check(dev
);
597 err
= do_elmc_probe(dev
);
607 /**********************************************
608 * init the chip (elmc-interrupt should be disabled?!)
609 * needs a correct 'allocated' memory
612 static int init586(struct net_device
*dev
)
617 struct priv
*p
= (struct priv
*) dev
->priv
;
618 volatile struct configure_cmd_struct
*cfg_cmd
;
619 volatile struct iasetup_cmd_struct
*ias_cmd
;
620 volatile struct tdr_cmd_struct
*tdr_cmd
;
621 volatile struct mcsetup_cmd_struct
*mc_cmd
;
622 struct dev_mc_list
*dmi
= dev
->mc_list
;
623 int num_addrs
= dev
->mc_count
;
625 ptr
= (void *) ((char *) p
->scb
+ sizeof(struct scb_struct
));
627 cfg_cmd
= (struct configure_cmd_struct
*) ptr
; /* configure-command */
628 cfg_cmd
->cmd_status
= 0;
629 cfg_cmd
->cmd_cmd
= CMD_CONFIGURE
| CMD_LAST
;
630 cfg_cmd
->cmd_link
= 0xffff;
632 cfg_cmd
->byte_cnt
= 0x0a; /* number of cfg bytes */
633 cfg_cmd
->fifo
= 0x08; /* fifo-limit (8=tx:32/rx:64) */
634 cfg_cmd
->sav_bf
= 0x40; /* hold or discard bad recv frames (bit 7) */
635 cfg_cmd
->adr_len
= 0x2e; /* addr_len |!src_insert |pre-len |loopback */
636 cfg_cmd
->priority
= 0x00;
638 cfg_cmd
->time_low
= 0x00;
639 cfg_cmd
->time_high
= 0xf2;
640 cfg_cmd
->promisc
= 0;
641 if (dev
->flags
& (IFF_ALLMULTI
| IFF_PROMISC
))
642 cfg_cmd
->promisc
= 1;
643 cfg_cmd
->carr_coll
= 0x00;
645 p
->scb
->cbl_offset
= make16(cfg_cmd
);
647 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
650 s
= jiffies
; /* warning: only active with interrupts on !! */
651 while (!(cfg_cmd
->cmd_status
& STAT_COMPL
)) {
652 if (time_after(jiffies
, s
+ 30*HZ
/100))
656 if ((cfg_cmd
->cmd_status
& (STAT_OK
| STAT_COMPL
)) != (STAT_COMPL
| STAT_OK
)) {
657 printk(KERN_WARNING
"%s (elmc): configure command failed: %x\n", dev
->name
, cfg_cmd
->cmd_status
);
661 * individual address setup
663 ias_cmd
= (struct iasetup_cmd_struct
*) ptr
;
665 ias_cmd
->cmd_status
= 0;
666 ias_cmd
->cmd_cmd
= CMD_IASETUP
| CMD_LAST
;
667 ias_cmd
->cmd_link
= 0xffff;
669 memcpy((char *) &ias_cmd
->iaddr
, (char *) dev
->dev_addr
, ETH_ALEN
);
671 p
->scb
->cbl_offset
= make16(ias_cmd
);
673 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
677 while (!(ias_cmd
->cmd_status
& STAT_COMPL
)) {
678 if (time_after(jiffies
, s
+ 30*HZ
/100))
682 if ((ias_cmd
->cmd_status
& (STAT_OK
| STAT_COMPL
)) != (STAT_OK
| STAT_COMPL
)) {
683 printk(KERN_WARNING
"%s (elmc): individual address setup command failed: %04x\n", dev
->name
, ias_cmd
->cmd_status
);
687 * TDR, wire check .. e.g. no resistor e.t.c
689 tdr_cmd
= (struct tdr_cmd_struct
*) ptr
;
691 tdr_cmd
->cmd_status
= 0;
692 tdr_cmd
->cmd_cmd
= CMD_TDR
| CMD_LAST
;
693 tdr_cmd
->cmd_link
= 0xffff;
696 p
->scb
->cbl_offset
= make16(tdr_cmd
);
698 p
->scb
->cmd
= CUC_START
; /* cmd.-unit start */
702 while (!(tdr_cmd
->cmd_status
& STAT_COMPL
)) {
703 if (time_after(jiffies
, s
+ 30*HZ
/100)) {
704 printk(KERN_WARNING
"%s: %d Problems while running the TDR.\n", dev
->name
, __LINE__
);
711 DELAY(2); /* wait for result */
712 result
= tdr_cmd
->status
;
714 p
->scb
->cmd
= p
->scb
->status
& STAT_MASK
;
715 elmc_id_attn586(); /* ack the interrupts */
717 if (result
& TDR_LNK_OK
) {
719 } else if (result
& TDR_XCVR_PRB
) {
720 printk(KERN_WARNING
"%s: TDR: Transceiver problem!\n", dev
->name
);
721 } else if (result
& TDR_ET_OPN
) {
722 printk(KERN_WARNING
"%s: TDR: No correct termination %d clocks away.\n", dev
->name
, result
& TDR_TIMEMASK
);
723 } else if (result
& TDR_ET_SRT
) {
724 if (result
& TDR_TIMEMASK
) /* time == 0 -> strange :-) */
725 printk(KERN_WARNING
"%s: TDR: Detected a short circuit %d clocks away.\n", dev
->name
, result
& TDR_TIMEMASK
);
727 printk(KERN_WARNING
"%s: TDR: Unknown status %04x\n", dev
->name
, result
);
733 p
->scb
->cmd
= p
->scb
->status
& STAT_MASK
;
737 * alloc nop/xmit-cmds
739 #if (NUM_XMIT_BUFFS == 1)
740 for (i
= 0; i
< 2; i
++) {
741 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*) ptr
;
742 p
->nop_cmds
[i
]->cmd_cmd
= CMD_NOP
;
743 p
->nop_cmds
[i
]->cmd_status
= 0;
744 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
745 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
747 p
->xmit_cmds
[0] = (struct transmit_cmd_struct
*) ptr
; /* transmit cmd/buff 0 */
748 ptr
= (char *) ptr
+ sizeof(struct transmit_cmd_struct
);
750 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
751 p
->nop_cmds
[i
] = (struct nop_cmd_struct
*) ptr
;
752 p
->nop_cmds
[i
]->cmd_cmd
= CMD_NOP
;
753 p
->nop_cmds
[i
]->cmd_status
= 0;
754 p
->nop_cmds
[i
]->cmd_link
= make16((p
->nop_cmds
[i
]));
755 ptr
= (char *) ptr
+ sizeof(struct nop_cmd_struct
);
756 p
->xmit_cmds
[i
] = (struct transmit_cmd_struct
*) ptr
; /*transmit cmd/buff 0 */
757 ptr
= (char *) ptr
+ sizeof(struct transmit_cmd_struct
);
761 ptr
= alloc_rfa(dev
, (void *) ptr
); /* init receive-frame-area */
768 /* I don't understand this: do we really need memory after the init? */
769 int len
= ((char *) p
->iscp
- (char *) ptr
- 8) / 6;
771 printk(KERN_ERR
"%s: Ooooops, no memory for MC-Setup!\n", dev
->name
);
773 if (len
< num_addrs
) {
775 printk(KERN_WARNING
"%s: Sorry, can only apply %d MC-Address(es).\n",
776 dev
->name
, num_addrs
);
778 mc_cmd
= (struct mcsetup_cmd_struct
*) ptr
;
779 mc_cmd
->cmd_status
= 0;
780 mc_cmd
->cmd_cmd
= CMD_MCSETUP
| CMD_LAST
;
781 mc_cmd
->cmd_link
= 0xffff;
782 mc_cmd
->mc_cnt
= num_addrs
* 6;
783 for (i
= 0; i
< num_addrs
; i
++) {
784 memcpy((char *) mc_cmd
->mc_list
[i
], dmi
->dmi_addr
, 6);
787 p
->scb
->cbl_offset
= make16(mc_cmd
);
788 p
->scb
->cmd
= CUC_START
;
791 while (!(mc_cmd
->cmd_status
& STAT_COMPL
)) {
792 if (time_after(jiffies
, s
+ 30*HZ
/100))
795 if (!(mc_cmd
->cmd_status
& STAT_COMPL
)) {
796 printk(KERN_WARNING
"%s: Can't apply multicast-address-list.\n", dev
->name
);
801 * alloc xmit-buffs / init xmit_cmds
803 for (i
= 0; i
< NUM_XMIT_BUFFS
; i
++) {
804 p
->xmit_cbuffs
[i
] = (char *) ptr
; /* char-buffs */
805 ptr
= (char *) ptr
+ XMIT_BUFF_SIZE
;
806 p
->xmit_buffs
[i
] = (struct tbd_struct
*) ptr
; /* TBD */
807 ptr
= (char *) ptr
+ sizeof(struct tbd_struct
);
808 if ((void *) ptr
> (void *) p
->iscp
) {
809 printk(KERN_ERR
"%s: not enough shared-mem for your configuration!\n", dev
->name
);
812 memset((char *) (p
->xmit_cmds
[i
]), 0, sizeof(struct transmit_cmd_struct
));
813 memset((char *) (p
->xmit_buffs
[i
]), 0, sizeof(struct tbd_struct
));
814 p
->xmit_cmds
[i
]->cmd_status
= STAT_COMPL
;
815 p
->xmit_cmds
[i
]->cmd_cmd
= CMD_XMIT
| CMD_INT
;
816 p
->xmit_cmds
[i
]->tbd_offset
= make16((p
->xmit_buffs
[i
]));
817 p
->xmit_buffs
[i
]->next
= 0xffff;
818 p
->xmit_buffs
[i
]->buffer
= make24((p
->xmit_cbuffs
[i
]));
823 #ifndef NO_NOPCOMMANDS
828 * 'start transmitter' (nop-loop)
830 #ifndef NO_NOPCOMMANDS
831 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[0]);
832 p
->scb
->cmd
= CUC_START
;
836 p
->xmit_cmds
[0]->cmd_link
= 0xffff;
837 p
->xmit_cmds
[0]->cmd_cmd
= CMD_XMIT
| CMD_LAST
| CMD_INT
;
843 /******************************************************
844 * This is a helper routine for elmc_rnr_int() and init586().
845 * It sets up the Receive Frame Area (RFA).
848 static void *alloc_rfa(struct net_device
*dev
, void *ptr
)
850 volatile struct rfd_struct
*rfd
= (struct rfd_struct
*) ptr
;
851 volatile struct rbd_struct
*rbd
;
853 struct priv
*p
= (struct priv
*) dev
->priv
;
855 memset((char *) rfd
, 0, sizeof(struct rfd_struct
) * p
->num_recv_buffs
);
858 for (i
= 0; i
< p
->num_recv_buffs
; i
++) {
859 rfd
[i
].next
= make16(rfd
+ (i
+ 1) % p
->num_recv_buffs
);
861 rfd
[p
->num_recv_buffs
- 1].last
= RFD_SUSP
; /* RU suspend */
863 ptr
= (void *) (rfd
+ p
->num_recv_buffs
);
865 rbd
= (struct rbd_struct
*) ptr
;
866 ptr
= (void *) (rbd
+ p
->num_recv_buffs
);
868 /* clr descriptors */
869 memset((char *) rbd
, 0, sizeof(struct rbd_struct
) * p
->num_recv_buffs
);
871 for (i
= 0; i
< p
->num_recv_buffs
; i
++) {
872 rbd
[i
].next
= make16((rbd
+ (i
+ 1) % p
->num_recv_buffs
));
873 rbd
[i
].size
= RECV_BUFF_SIZE
;
874 rbd
[i
].buffer
= make24(ptr
);
875 ptr
= (char *) ptr
+ RECV_BUFF_SIZE
;
878 p
->rfd_top
= p
->rfd_first
;
879 p
->rfd_last
= p
->rfd_first
+ p
->num_recv_buffs
- 1;
881 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
882 p
->rfd_first
->rbd_offset
= make16(rbd
);
888 /**************************************************
889 * Interrupt Handler ...
893 elmc_interrupt(int irq
, void *dev_id
)
895 struct net_device
*dev
= dev_id
;
899 if (!netif_running(dev
)) {
900 /* The 3c523 has this habit of generating interrupts during the
901 reset. I'm not sure if the ni52 has this same problem, but it's
902 really annoying if we haven't finished initializing it. I was
903 hoping all the elmc_id_* commands would disable this, but I
904 might have missed a few. */
906 elmc_id_attn586(); /* ack inter. and disable any more */
908 } else if (!(ELMC_CTRL_INT
& inb(dev
->base_addr
+ ELMC_CTRL
))) {
909 /* wasn't this device */
912 /* reading ELMC_CTRL also clears the INT bit. */
914 p
= (struct priv
*) dev
->priv
;
916 while ((stat
= p
->scb
->status
& STAT_MASK
))
919 elmc_attn586(); /* ack inter. */
921 if (stat
& STAT_CX
) {
922 /* command with I-bit set complete */
925 if (stat
& STAT_FR
) {
926 /* received a frame */
929 #ifndef NO_NOPCOMMANDS
930 if (stat
& STAT_CNA
) {
931 /* CU went 'not ready' */
932 if (netif_running(dev
)) {
933 printk(KERN_WARNING
"%s: oops! CU has left active state. stat: %04x/%04x.\n", dev
->name
, (int) stat
, (int) p
->scb
->status
);
938 if (stat
& STAT_RNR
) {
939 /* RU went 'not ready' */
941 if (p
->scb
->status
& RU_SUSPEND
) {
942 /* special case: RU_SUSPEND */
945 p
->scb
->cmd
= RUC_RESUME
;
948 printk(KERN_WARNING
"%s: Receiver-Unit went 'NOT READY': %04x/%04x.\n", dev
->name
, (int) stat
, (int) p
->scb
->status
);
952 WAIT_4_SCB_CMD(); /* wait for ack. (elmc_xmt_int can be faster than ack!!) */
953 if (p
->scb
->cmd
) { /* timed out? */
960 /*******************************************************
964 static void elmc_rcv_int(struct net_device
*dev
)
967 unsigned short totlen
;
969 struct rbd_struct
*rbd
;
970 struct priv
*p
= (struct priv
*) dev
->priv
;
972 for (; (status
= p
->rfd_top
->status
) & STAT_COMPL
;) {
973 rbd
= (struct rbd_struct
*) make32(p
->rfd_top
->rbd_offset
);
975 if (status
& STAT_OK
) { /* frame received without error? */
976 if ((totlen
= rbd
->status
) & RBD_LAST
) { /* the first and the last buffer? */
977 totlen
&= RBD_MASK
; /* length of this frame */
979 skb
= (struct sk_buff
*) dev_alloc_skb(totlen
+ 2);
981 skb_reserve(skb
, 2); /* 16 byte alignment */
983 skb_copy_to_linear_data(skb
, (char *) p
->base
+(unsigned long) rbd
->buffer
,totlen
);
984 skb
->protocol
= eth_type_trans(skb
, dev
);
986 dev
->stats
.rx_packets
++;
987 dev
->stats
.rx_bytes
+= totlen
;
989 dev
->stats
.rx_dropped
++;
992 printk(KERN_WARNING
"%s: received oversized frame.\n", dev
->name
);
993 dev
->stats
.rx_dropped
++;
995 } else { /* frame !(ok), only with 'save-bad-frames' */
996 printk(KERN_WARNING
"%s: oops! rfd-error-status: %04x\n", dev
->name
, status
);
997 dev
->stats
.rx_errors
++;
999 p
->rfd_top
->status
= 0;
1000 p
->rfd_top
->last
= RFD_SUSP
;
1001 p
->rfd_last
->last
= 0; /* delete RU_SUSP */
1002 p
->rfd_last
= p
->rfd_top
;
1003 p
->rfd_top
= (struct rfd_struct
*) make32(p
->rfd_top
->next
); /* step to next RFD */
1007 /**********************************************************
1008 * handle 'Receiver went not ready'.
1011 static void elmc_rnr_int(struct net_device
*dev
)
1013 struct priv
*p
= (struct priv
*) dev
->priv
;
1015 dev
->stats
.rx_errors
++;
1017 WAIT_4_SCB_CMD(); /* wait for the last cmd */
1018 p
->scb
->cmd
= RUC_ABORT
; /* usually the RU is in the 'no resource'-state .. abort it now. */
1020 WAIT_4_SCB_CMD(); /* wait for accept cmd. */
1022 alloc_rfa(dev
, (char *) p
->rfd_first
);
1023 startrecv586(dev
); /* restart RU */
1025 printk(KERN_WARNING
"%s: Receive-Unit restarted. Status: %04x\n", dev
->name
, p
->scb
->status
);
1029 /**********************************************************
1030 * handle xmit - interrupt
1033 static void elmc_xmt_int(struct net_device
*dev
)
1036 struct priv
*p
= (struct priv
*) dev
->priv
;
1038 status
= p
->xmit_cmds
[p
->xmit_last
]->cmd_status
;
1039 if (!(status
& STAT_COMPL
)) {
1040 printk(KERN_WARNING
"%s: strange .. xmit-int without a 'COMPLETE'\n", dev
->name
);
1042 if (status
& STAT_OK
) {
1043 dev
->stats
.tx_packets
++;
1044 dev
->stats
.collisions
+= (status
& TCMD_MAXCOLLMASK
);
1046 dev
->stats
.tx_errors
++;
1047 if (status
& TCMD_LATECOLL
) {
1048 printk(KERN_WARNING
"%s: late collision detected.\n", dev
->name
);
1049 dev
->stats
.collisions
++;
1050 } else if (status
& TCMD_NOCARRIER
) {
1051 dev
->stats
.tx_carrier_errors
++;
1052 printk(KERN_WARNING
"%s: no carrier detected.\n", dev
->name
);
1053 } else if (status
& TCMD_LOSTCTS
) {
1054 printk(KERN_WARNING
"%s: loss of CTS detected.\n", dev
->name
);
1055 } else if (status
& TCMD_UNDERRUN
) {
1056 dev
->stats
.tx_fifo_errors
++;
1057 printk(KERN_WARNING
"%s: DMA underrun detected.\n", dev
->name
);
1058 } else if (status
& TCMD_MAXCOLL
) {
1059 printk(KERN_WARNING
"%s: Max. collisions exceeded.\n", dev
->name
);
1060 dev
->stats
.collisions
+= 16;
1064 #if (NUM_XMIT_BUFFS != 1)
1065 if ((++p
->xmit_last
) == NUM_XMIT_BUFFS
) {
1070 netif_wake_queue(dev
);
1073 /***********************************************************
1074 * (re)start the receiver
1077 static void startrecv586(struct net_device
*dev
)
1079 struct priv
*p
= (struct priv
*) dev
->priv
;
1081 p
->scb
->rfa_offset
= make16(p
->rfd_first
);
1082 p
->scb
->cmd
= RUC_START
;
1083 elmc_attn586(); /* start cmd. */
1084 WAIT_4_SCB_CMD(); /* wait for accept cmd. (no timeout!!) */
1087 /******************************************************
1091 static void elmc_timeout(struct net_device
*dev
)
1093 struct priv
*p
= (struct priv
*) dev
->priv
;
1094 /* COMMAND-UNIT active? */
1095 if (p
->scb
->status
& CU_ACTIVE
) {
1097 printk("%s: strange ... timeout with CU active?!?\n", dev
->name
);
1098 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
);
1100 p
->scb
->cmd
= CUC_ABORT
;
1103 p
->scb
->cbl_offset
= make16(p
->nop_cmds
[p
->nop_point
]);
1104 p
->scb
->cmd
= CUC_START
;
1107 netif_wake_queue(dev
);
1110 printk("%s: xmitter timed out, try to restart! stat: %04x\n", dev
->name
, p
->scb
->status
);
1111 printk("%s: command-stats: %04x %04x\n", dev
->name
, p
->xmit_cmds
[0]->cmd_status
, p
->xmit_cmds
[1]->cmd_status
);
1118 /******************************************************
1122 static int elmc_send_packet(struct sk_buff
*skb
, struct net_device
*dev
)
1126 #ifndef NO_NOPCOMMANDS
1129 struct priv
*p
= (struct priv
*) dev
->priv
;
1131 netif_stop_queue(dev
);
1133 len
= (ETH_ZLEN
< skb
->len
) ? skb
->len
: ETH_ZLEN
;
1135 if (len
!= skb
->len
)
1136 memset((char *) p
->xmit_cbuffs
[p
->xmit_count
], 0, ETH_ZLEN
);
1137 skb_copy_from_linear_data(skb
, (char *) p
->xmit_cbuffs
[p
->xmit_count
], skb
->len
);
1139 #if (NUM_XMIT_BUFFS == 1)
1140 #ifdef NO_NOPCOMMANDS
1141 p
->xmit_buffs
[0]->size
= TBD_LAST
| len
;
1142 for (i
= 0; i
< 16; i
++) {
1143 p
->scb
->cbl_offset
= make16(p
->xmit_cmds
[0]);
1144 p
->scb
->cmd
= CUC_START
;
1145 p
->xmit_cmds
[0]->cmd_status
= 0;
1147 dev
->trans_start
= jiffies
;
1152 if ((p
->scb
->status
& CU_ACTIVE
)) { /* test it, because CU sometimes doesn't start immediately */
1155 if (p
->xmit_cmds
[0]->cmd_status
) {
1159 printk(KERN_WARNING
"%s: Can't start transmit-command.\n", dev
->name
);
1163 next_nop
= (p
->nop_point
+ 1) & 0x1;
1164 p
->xmit_buffs
[0]->size
= TBD_LAST
| len
;
1166 p
->xmit_cmds
[0]->cmd_link
= p
->nop_cmds
[next_nop
]->cmd_link
1167 = make16((p
->nop_cmds
[next_nop
]));
1168 p
->xmit_cmds
[0]->cmd_status
= p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1170 p
->nop_cmds
[p
->nop_point
]->cmd_link
= make16((p
->xmit_cmds
[0]));
1171 dev
->trans_start
= jiffies
;
1172 p
->nop_point
= next_nop
;
1176 p
->xmit_buffs
[p
->xmit_count
]->size
= TBD_LAST
| len
;
1177 if ((next_nop
= p
->xmit_count
+ 1) == NUM_XMIT_BUFFS
) {
1180 p
->xmit_cmds
[p
->xmit_count
]->cmd_status
= 0;
1181 p
->xmit_cmds
[p
->xmit_count
]->cmd_link
= p
->nop_cmds
[next_nop
]->cmd_link
1182 = make16((p
->nop_cmds
[next_nop
]));
1183 p
->nop_cmds
[next_nop
]->cmd_status
= 0;
1184 p
->nop_cmds
[p
->xmit_count
]->cmd_link
= make16((p
->xmit_cmds
[p
->xmit_count
]));
1185 dev
->trans_start
= jiffies
;
1186 p
->xmit_count
= next_nop
;
1187 if (p
->xmit_count
!= p
->xmit_last
)
1188 netif_wake_queue(dev
);
1194 /*******************************************
1195 * Someone wanna have the statistics
1198 static struct net_device_stats
*elmc_get_stats(struct net_device
*dev
)
1200 struct priv
*p
= (struct priv
*) dev
->priv
;
1201 unsigned short crc
, aln
, rsc
, ovrn
;
1203 crc
= p
->scb
->crc_errs
; /* get error-statistic from the ni82586 */
1204 p
->scb
->crc_errs
-= crc
;
1205 aln
= p
->scb
->aln_errs
;
1206 p
->scb
->aln_errs
-= aln
;
1207 rsc
= p
->scb
->rsc_errs
;
1208 p
->scb
->rsc_errs
-= rsc
;
1209 ovrn
= p
->scb
->ovrn_errs
;
1210 p
->scb
->ovrn_errs
-= ovrn
;
1212 dev
->stats
.rx_crc_errors
+= crc
;
1213 dev
->stats
.rx_fifo_errors
+= ovrn
;
1214 dev
->stats
.rx_frame_errors
+= aln
;
1215 dev
->stats
.rx_dropped
+= rsc
;
1220 /********************************************************
1224 #ifdef ELMC_MULTICAST
1225 static void set_multicast_list(struct net_device
*dev
)
1228 /* without a running interface, promiscuous doesn't work */
1239 static void netdev_get_drvinfo(struct net_device
*dev
,
1240 struct ethtool_drvinfo
*info
)
1242 strcpy(info
->driver
, DRV_NAME
);
1243 strcpy(info
->version
, DRV_VERSION
);
1244 sprintf(info
->bus_info
, "MCA 0x%lx", dev
->base_addr
);
1247 static const struct ethtool_ops netdev_ethtool_ops
= {
1248 .get_drvinfo
= netdev_get_drvinfo
,
1253 /* Increase if needed ;) */
1254 #define MAX_3C523_CARDS 4
1256 static struct net_device
*dev_elmc
[MAX_3C523_CARDS
];
1257 static int irq
[MAX_3C523_CARDS
];
1258 static int io
[MAX_3C523_CARDS
];
1259 module_param_array(irq
, int, NULL
, 0);
1260 module_param_array(io
, int, NULL
, 0);
1261 MODULE_PARM_DESC(io
, "EtherLink/MC I/O base address(es)");
1262 MODULE_PARM_DESC(irq
, "EtherLink/MC IRQ number(s)");
1263 MODULE_LICENSE("GPL");
1265 int __init
init_module(void)
1267 int this_dev
,found
= 0;
1269 /* Loop until we either can't find any more cards, or we have MAX_3C523_CARDS */
1270 for(this_dev
=0; this_dev
<MAX_3C523_CARDS
; this_dev
++) {
1271 struct net_device
*dev
= alloc_etherdev(sizeof(struct priv
));
1274 dev
->irq
=irq
[this_dev
];
1275 dev
->base_addr
=io
[this_dev
];
1276 if (do_elmc_probe(dev
) == 0) {
1277 dev_elmc
[this_dev
] = dev
;
1282 if (io
[this_dev
]==0)
1284 printk(KERN_WARNING
"3c523.c: No 3c523 card found at io=%#x\n",io
[this_dev
]);
1288 if(io
[0]==0) printk(KERN_NOTICE
"3c523.c: No 3c523 cards found\n");
1293 void __exit
cleanup_module(void)
1296 for (this_dev
=0; this_dev
<MAX_3C523_CARDS
; this_dev
++) {
1297 struct net_device
*dev
= dev_elmc
[this_dev
];
1299 unregister_netdev(dev
);