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1/*------------------------------------------------------------------------
2 . smc9194.c
3 . This is a driver for SMC's 9000 series of Ethernet cards.
4 .
5 . Copyright (C) 1996 by Erik Stahlman
6 . This software may be used and distributed according to the terms
7 . of the GNU General Public License, incorporated herein by reference.
8 .
9 . "Features" of the SMC chip:
10 . 4608 byte packet memory. ( for the 91C92. Others have more )
11 . EEPROM for configuration
12 . AUI/TP selection ( mine has 10Base2/10BaseT select )
13 .
14 . Arguments:
15 . io = for the base address
16 . irq = for the IRQ
17 . ifport = 0 for autodetect, 1 for TP, 2 for AUI ( or 10base2 )
18 .
19 . author:
20 . Erik Stahlman ( erik@vt.edu )
21 . contributors:
22 . Arnaldo Carvalho de Melo <acme@conectiva.com.br>
23 .
24 . Hardware multicast code from Peter Cammaert ( pc@denkart.be )
25 .
26 . Sources:
27 . o SMC databook
28 . o skeleton.c by Donald Becker ( becker@scyld.com )
29 . o ( a LOT of advice from Becker as well )
30 .
31 . History:
32 . 12/07/95 Erik Stahlman written, got receive/xmit handled
33 . 01/03/96 Erik Stahlman worked out some bugs, actually usable!!! :-)
34 . 01/06/96 Erik Stahlman cleaned up some, better testing, etc
35 . 01/29/96 Erik Stahlman fixed autoirq, added multicast
36 . 02/01/96 Erik Stahlman 1. disabled all interrupts in smc_reset
37 . 2. got rid of post-decrementing bug -- UGH.
38 . 02/13/96 Erik Stahlman Tried to fix autoirq failure. Added more
39 . descriptive error messages.
40 . 02/15/96 Erik Stahlman Fixed typo that caused detection failure
41 . 02/23/96 Erik Stahlman Modified it to fit into kernel tree
42 . Added support to change hardware address
43 . Cleared stats on opens
44 . 02/26/96 Erik Stahlman Trial support for Kernel 1.2.13
45 . Kludge for automatic IRQ detection
46 . 03/04/96 Erik Stahlman Fixed kernel 1.3.70 +
47 . Fixed bug reported by Gardner Buchanan in
48 . smc_enable, with outw instead of outb
49 . 03/06/96 Erik Stahlman Added hardware multicast from Peter Cammaert
50 . 04/14/00 Heiko Pruessing (SMA Regelsysteme) Fixed bug in chip memory
51 . allocation
52 . 08/20/00 Arnaldo Melo fix kfree(skb) in smc_hardware_send_packet
53 . 12/15/00 Christian Jullien fix "Warning: kfree_skb on hard IRQ"
54 . 11/08/01 Matt Domsch Use common crc32 function
55 ----------------------------------------------------------------------------*/
56
57static const char version[] =
58 "smc9194.c:v0.14 12/15/00 by Erik Stahlman (erik@vt.edu)";
59
60#include <linux/module.h>
61#include <linux/kernel.h>
62#include <linux/types.h>
63#include <linux/fcntl.h>
64#include <linux/interrupt.h>
65#include <linux/ioport.h>
66#include <linux/in.h>
67#include <linux/string.h>
68#include <linux/init.h>
69#include <linux/crc32.h>
70#include <linux/errno.h>
71#include <linux/netdevice.h>
72#include <linux/etherdevice.h>
73#include <linux/skbuff.h>
74#include <linux/bitops.h>
75
76#include <asm/io.h>
77
78#include "smc9194.h"
79
80#define DRV_NAME "smc9194"
81
82/*------------------------------------------------------------------------
83 .
84 . Configuration options, for the experienced user to change.
85 .
86 -------------------------------------------------------------------------*/
87
88/*
89 . Do you want to use 32 bit xfers? This should work on all chips, as
90 . the chipset is designed to accommodate them.
91*/
92#ifdef __sh__
93#undef USE_32_BIT
94#else
95#define USE_32_BIT 1
96#endif
97
98/*
99 .the SMC9194 can be at any of the following port addresses. To change,
100 .for a slightly different card, you can add it to the array. Keep in
101 .mind that the array must end in zero.
102*/
103
104struct devlist {
105 unsigned int port;
106 unsigned int irq;
107};
108
109static struct devlist smc_devlist[] __initdata = {
110 {.port = 0x200, .irq = 0},
111 {.port = 0x220, .irq = 0},
112 {.port = 0x240, .irq = 0},
113 {.port = 0x260, .irq = 0},
114 {.port = 0x280, .irq = 0},
115 {.port = 0x2A0, .irq = 0},
116 {.port = 0x2C0, .irq = 0},
117 {.port = 0x2E0, .irq = 0},
118 {.port = 0x300, .irq = 0},
119 {.port = 0x320, .irq = 0},
120 {.port = 0x340, .irq = 0},
121 {.port = 0x360, .irq = 0},
122 {.port = 0x380, .irq = 0},
123 {.port = 0x3A0, .irq = 0},
124 {.port = 0x3C0, .irq = 0},
125 {.port = 0x3E0, .irq = 0},
126 {.port = 0, .irq = 0},
127};
128/*
129 . Wait time for memory to be free. This probably shouldn't be
130 . tuned that much, as waiting for this means nothing else happens
131 . in the system
132*/
133#define MEMORY_WAIT_TIME 16
134
135/*
136 . DEBUGGING LEVELS
137 .
138 . 0 for normal operation
139 . 1 for slightly more details
140 . >2 for various levels of increasingly useless information
141 . 2 for interrupt tracking, status flags
142 . 3 for packet dumps, etc.
143*/
144#define SMC_DEBUG 0
145
146#if (SMC_DEBUG > 2 )
147#define PRINTK3(x) printk x
148#else
149#define PRINTK3(x)
150#endif
151
152#if SMC_DEBUG > 1
153#define PRINTK2(x) printk x
154#else
155#define PRINTK2(x)
156#endif
157
158#ifdef SMC_DEBUG
159#define PRINTK(x) printk x
160#else
161#define PRINTK(x)
162#endif
163
164
165/*------------------------------------------------------------------------
166 .
167 . The internal workings of the driver. If you are changing anything
168 . here with the SMC stuff, you should have the datasheet and known
169 . what you are doing.
170 .
171 -------------------------------------------------------------------------*/
172#define CARDNAME "SMC9194"
173
174
175/* store this information for the driver.. */
176struct smc_local {
177 /*
178 If I have to wait until memory is available to send
179 a packet, I will store the skbuff here, until I get the
180 desired memory. Then, I'll send it out and free it.
181 */
182 struct sk_buff * saved_skb;
183
184 /*
185 . This keeps track of how many packets that I have
186 . sent out. When an TX_EMPTY interrupt comes, I know
187 . that all of these have been sent.
188 */
189 int packets_waiting;
190};
191
192
193/*-----------------------------------------------------------------
194 .
195 . The driver can be entered at any of the following entry points.
196 .
197 .------------------------------------------------------------------ */
198
199/*
200 . This is called by register_netdev(). It is responsible for
201 . checking the portlist for the SMC9000 series chipset. If it finds
202 . one, then it will initialize the device, find the hardware information,
203 . and sets up the appropriate device parameters.
204 . NOTE: Interrupts are *OFF* when this procedure is called.
205 .
206 . NB:This shouldn't be static since it is referred to externally.
207*/
208struct net_device *smc_init(int unit);
209
210/*
211 . The kernel calls this function when someone wants to use the device,
212 . typically 'ifconfig ethX up'.
213*/
214static int smc_open(struct net_device *dev);
215
216/*
217 . Our watchdog timed out. Called by the networking layer
218*/
219static void smc_timeout(struct net_device *dev);
220
221/*
222 . This is called by the kernel in response to 'ifconfig ethX down'. It
223 . is responsible for cleaning up everything that the open routine
224 . does, and maybe putting the card into a powerdown state.
225*/
226static int smc_close(struct net_device *dev);
227
228/*
229 . Finally, a call to set promiscuous mode ( for TCPDUMP and related
230 . programs ) and multicast modes.
231*/
232static void smc_set_multicast_list(struct net_device *dev);
233
234
235/*---------------------------------------------------------------
236 .
237 . Interrupt level calls..
238 .
239 ----------------------------------------------------------------*/
240
241/*
242 . Handles the actual interrupt
243*/
244static irqreturn_t smc_interrupt(int irq, void *);
245/*
246 . This is a separate procedure to handle the receipt of a packet, to
247 . leave the interrupt code looking slightly cleaner
248*/
249static inline void smc_rcv( struct net_device *dev );
250/*
251 . This handles a TX interrupt, which is only called when an error
252 . relating to a packet is sent.
253*/
254static inline void smc_tx( struct net_device * dev );
255
256/*
257 ------------------------------------------------------------
258 .
259 . Internal routines
260 .
261 ------------------------------------------------------------
262*/
263
264/*
265 . Test if a given location contains a chip, trying to cause as
266 . little damage as possible if it's not a SMC chip.
267*/
268static int smc_probe(struct net_device *dev, int ioaddr);
269
270/*
271 . A rather simple routine to print out a packet for debugging purposes.
272*/
273#if SMC_DEBUG > 2
274static void print_packet( byte *, int );
275#endif
276
277#define tx_done(dev) 1
278
279/* this is called to actually send the packet to the chip */
280static void smc_hardware_send_packet( struct net_device * dev );
281
282/* Since I am not sure if I will have enough room in the chip's ram
283 . to store the packet, I call this routine, which either sends it
284 . now, or generates an interrupt when the card is ready for the
285 . packet */
286static netdev_tx_t smc_wait_to_send_packet( struct sk_buff * skb,
287 struct net_device *dev );
288
289/* this does a soft reset on the device */
290static void smc_reset( int ioaddr );
291
292/* Enable Interrupts, Receive, and Transmit */
293static void smc_enable( int ioaddr );
294
295/* this puts the device in an inactive state */
296static void smc_shutdown( int ioaddr );
297
298/* This routine will find the IRQ of the driver if one is not
299 . specified in the input to the device. */
300static int smc_findirq( int ioaddr );
301
302/*
303 . Function: smc_reset( int ioaddr )
304 . Purpose:
305 . This sets the SMC91xx chip to its normal state, hopefully from whatever
306 . mess that any other DOS driver has put it in.
307 .
308 . Maybe I should reset more registers to defaults in here? SOFTRESET should
309 . do that for me.
310 .
311 . Method:
312 . 1. send a SOFT RESET
313 . 2. wait for it to finish
314 . 3. enable autorelease mode
315 . 4. reset the memory management unit
316 . 5. clear all interrupts
317 .
318*/
319static void smc_reset( int ioaddr )
320{
321 /* This resets the registers mostly to defaults, but doesn't
322 affect EEPROM. That seems unnecessary */
323 SMC_SELECT_BANK( 0 );
324 outw( RCR_SOFTRESET, ioaddr + RCR );
325
326 /* this should pause enough for the chip to be happy */
327 SMC_DELAY( );
328
329 /* Set the transmit and receive configuration registers to
330 default values */
331 outw( RCR_CLEAR, ioaddr + RCR );
332 outw( TCR_CLEAR, ioaddr + TCR );
333
334 /* set the control register to automatically
335 release successfully transmitted packets, to make the best
336 use out of our limited memory */
337 SMC_SELECT_BANK( 1 );
338 outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
339
340 /* Reset the MMU */
341 SMC_SELECT_BANK( 2 );
342 outw( MC_RESET, ioaddr + MMU_CMD );
343
344 /* Note: It doesn't seem that waiting for the MMU busy is needed here,
345 but this is a place where future chipsets _COULD_ break. Be wary
346 of issuing another MMU command right after this */
347
348 outb( 0, ioaddr + INT_MASK );
349}
350
351/*
352 . Function: smc_enable
353 . Purpose: let the chip talk to the outside work
354 . Method:
355 . 1. Enable the transmitter
356 . 2. Enable the receiver
357 . 3. Enable interrupts
358*/
359static void smc_enable( int ioaddr )
360{
361 SMC_SELECT_BANK( 0 );
362 /* see the header file for options in TCR/RCR NORMAL*/
363 outw( TCR_NORMAL, ioaddr + TCR );
364 outw( RCR_NORMAL, ioaddr + RCR );
365
366 /* now, enable interrupts */
367 SMC_SELECT_BANK( 2 );
368 outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK );
369}
370
371/*
372 . Function: smc_shutdown
373 . Purpose: closes down the SMC91xxx chip.
374 . Method:
375 . 1. zero the interrupt mask
376 . 2. clear the enable receive flag
377 . 3. clear the enable xmit flags
378 .
379 . TODO:
380 . (1) maybe utilize power down mode.
381 . Why not yet? Because while the chip will go into power down mode,
382 . the manual says that it will wake up in response to any I/O requests
383 . in the register space. Empirical results do not show this working.
384*/
385static void smc_shutdown( int ioaddr )
386{
387 /* no more interrupts for me */
388 SMC_SELECT_BANK( 2 );
389 outb( 0, ioaddr + INT_MASK );
390
391 /* and tell the card to stay away from that nasty outside world */
392 SMC_SELECT_BANK( 0 );
393 outb( RCR_CLEAR, ioaddr + RCR );
394 outb( TCR_CLEAR, ioaddr + TCR );
395#if 0
396 /* finally, shut the chip down */
397 SMC_SELECT_BANK( 1 );
398 outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL );
399#endif
400}
401
402
403/*
404 . Function: smc_setmulticast( int ioaddr, struct net_device *dev )
405 . Purpose:
406 . This sets the internal hardware table to filter out unwanted multicast
407 . packets before they take up memory.
408 .
409 . The SMC chip uses a hash table where the high 6 bits of the CRC of
410 . address are the offset into the table. If that bit is 1, then the
411 . multicast packet is accepted. Otherwise, it's dropped silently.
412 .
413 . To use the 6 bits as an offset into the table, the high 3 bits are the
414 . number of the 8 bit register, while the low 3 bits are the bit within
415 . that register.
416 .
417 . This routine is based very heavily on the one provided by Peter Cammaert.
418*/
419
420
421static void smc_setmulticast(int ioaddr, struct net_device *dev)
422{
423 int i;
424 unsigned char multicast_table[ 8 ];
425 struct netdev_hw_addr *ha;
426 /* table for flipping the order of 3 bits */
427 unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
428
429 /* start with a table of all zeros: reject all */
430 memset( multicast_table, 0, sizeof( multicast_table ) );
431
432 netdev_for_each_mc_addr(ha, dev) {
433 int position;
434
435 /* only use the low order bits */
436 position = ether_crc_le(6, ha->addr) & 0x3f;
437
438 /* do some messy swapping to put the bit in the right spot */
439 multicast_table[invert3[position&7]] |=
440 (1<<invert3[(position>>3)&7]);
441
442 }
443 /* now, the table can be loaded into the chipset */
444 SMC_SELECT_BANK( 3 );
445
446 for ( i = 0; i < 8 ; i++ ) {
447 outb( multicast_table[i], ioaddr + MULTICAST1 + i );
448 }
449}
450
451/*
452 . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * )
453 . Purpose:
454 . Attempt to allocate memory for a packet, if chip-memory is not
455 . available, then tell the card to generate an interrupt when it
456 . is available.
457 .
458 . Algorithm:
459 .
460 . o if the saved_skb is not currently null, then drop this packet
461 . on the floor. This should never happen, because of TBUSY.
462 . o if the saved_skb is null, then replace it with the current packet,
463 . o See if I can sending it now.
464 . o (NO): Enable interrupts and let the interrupt handler deal with it.
465 . o (YES):Send it now.
466*/
467static netdev_tx_t smc_wait_to_send_packet(struct sk_buff *skb,
468 struct net_device *dev)
469{
470 struct smc_local *lp = netdev_priv(dev);
471 unsigned int ioaddr = dev->base_addr;
472 word length;
473 unsigned short numPages;
474 word time_out;
475
476 netif_stop_queue(dev);
477 /* Well, I want to send the packet.. but I don't know
478 if I can send it right now... */
479
480 if ( lp->saved_skb) {
481 /* THIS SHOULD NEVER HAPPEN. */
482 dev->stats.tx_aborted_errors++;
483 printk(CARDNAME": Bad Craziness - sent packet while busy.\n" );
484 return NETDEV_TX_BUSY;
485 }
486 lp->saved_skb = skb;
487
488 length = skb->len;
489
490 if (length < ETH_ZLEN) {
491 if (skb_padto(skb, ETH_ZLEN)) {
492 netif_wake_queue(dev);
493 return NETDEV_TX_OK;
494 }
495 length = ETH_ZLEN;
496 }
497
498 /*
499 ** The MMU wants the number of pages to be the number of 256 bytes
500 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
501 **
502 ** Pkt size for allocating is data length +6 (for additional status words,
503 ** length and ctl!) If odd size last byte is included in this header.
504 */
505 numPages = ((length & 0xfffe) + 6) / 256;
506
507 if (numPages > 7 ) {
508 printk(CARDNAME": Far too big packet error.\n");
509 /* freeing the packet is a good thing here... but should
510 . any packets of this size get down here? */
511 dev_kfree_skb (skb);
512 lp->saved_skb = NULL;
513 /* this IS an error, but, i don't want the skb saved */
514 netif_wake_queue(dev);
515 return NETDEV_TX_OK;
516 }
517 /* either way, a packet is waiting now */
518 lp->packets_waiting++;
519
520 /* now, try to allocate the memory */
521 SMC_SELECT_BANK( 2 );
522 outw( MC_ALLOC | numPages, ioaddr + MMU_CMD );
523 /*
524 . Performance Hack
525 .
526 . wait a short amount of time.. if I can send a packet now, I send
527 . it now. Otherwise, I enable an interrupt and wait for one to be
528 . available.
529 .
530 . I could have handled this a slightly different way, by checking to
531 . see if any memory was available in the FREE MEMORY register. However,
532 . either way, I need to generate an allocation, and the allocation works
533 . no matter what, so I saw no point in checking free memory.
534 */
535 time_out = MEMORY_WAIT_TIME;
536 do {
537 word status;
538
539 status = inb( ioaddr + INTERRUPT );
540 if ( status & IM_ALLOC_INT ) {
541 /* acknowledge the interrupt */
542 outb( IM_ALLOC_INT, ioaddr + INTERRUPT );
543 break;
544 }
545 } while ( -- time_out );
546
547 if ( !time_out ) {
548 /* oh well, wait until the chip finds memory later */
549 SMC_ENABLE_INT( IM_ALLOC_INT );
550 PRINTK2((CARDNAME": memory allocation deferred.\n"));
551 /* it's deferred, but I'll handle it later */
552 return NETDEV_TX_OK;
553 }
554 /* or YES! I can send the packet now.. */
555 smc_hardware_send_packet(dev);
556 netif_wake_queue(dev);
557 return NETDEV_TX_OK;
558}
559
560/*
561 . Function: smc_hardware_send_packet(struct net_device * )
562 . Purpose:
563 . This sends the actual packet to the SMC9xxx chip.
564 .
565 . Algorithm:
566 . First, see if a saved_skb is available.
567 . ( this should NOT be called if there is no 'saved_skb'
568 . Now, find the packet number that the chip allocated
569 . Point the data pointers at it in memory
570 . Set the length word in the chip's memory
571 . Dump the packet to chip memory
572 . Check if a last byte is needed ( odd length packet )
573 . if so, set the control flag right
574 . Tell the card to send it
575 . Enable the transmit interrupt, so I know if it failed
576 . Free the kernel data if I actually sent it.
577*/
578static void smc_hardware_send_packet( struct net_device * dev )
579{
580 struct smc_local *lp = netdev_priv(dev);
581 byte packet_no;
582 struct sk_buff * skb = lp->saved_skb;
583 word length;
584 unsigned int ioaddr;
585 byte * buf;
586
587 ioaddr = dev->base_addr;
588
589 if ( !skb ) {
590 PRINTK((CARDNAME": In XMIT with no packet to send\n"));
591 return;
592 }
593 length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
594 buf = skb->data;
595
596 /* If I get here, I _know_ there is a packet slot waiting for me */
597 packet_no = inb( ioaddr + PNR_ARR + 1 );
598 if ( packet_no & 0x80 ) {
599 /* or isn't there? BAD CHIP! */
600 netdev_dbg(dev, CARDNAME": Memory allocation failed.\n");
601 dev_kfree_skb_any(skb);
602 lp->saved_skb = NULL;
603 netif_wake_queue(dev);
604 return;
605 }
606
607 /* we have a packet address, so tell the card to use it */
608 outb( packet_no, ioaddr + PNR_ARR );
609
610 /* point to the beginning of the packet */
611 outw( PTR_AUTOINC , ioaddr + POINTER );
612
613 PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length));
614#if SMC_DEBUG > 2
615 print_packet( buf, length );
616#endif
617
618 /* send the packet length ( +6 for status, length and ctl byte )
619 and the status word ( set to zeros ) */
620#ifdef USE_32_BIT
621 outl( (length +6 ) << 16 , ioaddr + DATA_1 );
622#else
623 outw( 0, ioaddr + DATA_1 );
624 /* send the packet length ( +6 for status words, length, and ctl*/
625 outb( (length+6) & 0xFF,ioaddr + DATA_1 );
626 outb( (length+6) >> 8 , ioaddr + DATA_1 );
627#endif
628
629 /* send the actual data
630 . I _think_ it's faster to send the longs first, and then
631 . mop up by sending the last word. It depends heavily
632 . on alignment, at least on the 486. Maybe it would be
633 . a good idea to check which is optimal? But that could take
634 . almost as much time as is saved?
635 */
636#ifdef USE_32_BIT
637 if ( length & 0x2 ) {
638 outsl(ioaddr + DATA_1, buf, length >> 2 );
639 outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
640 }
641 else
642 outsl(ioaddr + DATA_1, buf, length >> 2 );
643#else
644 outsw(ioaddr + DATA_1 , buf, (length ) >> 1);
645#endif
646 /* Send the last byte, if there is one. */
647
648 if ( (length & 1) == 0 ) {
649 outw( 0, ioaddr + DATA_1 );
650 } else {
651 outb( buf[length -1 ], ioaddr + DATA_1 );
652 outb( 0x20, ioaddr + DATA_1);
653 }
654
655 /* enable the interrupts */
656 SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) );
657
658 /* and let the chipset deal with it */
659 outw( MC_ENQUEUE , ioaddr + MMU_CMD );
660
661 PRINTK2((CARDNAME": Sent packet of length %d\n", length));
662
663 lp->saved_skb = NULL;
664 dev_kfree_skb_any (skb);
665
666 dev->trans_start = jiffies;
667
668 /* we can send another packet */
669 netif_wake_queue(dev);
670}
671
672/*-------------------------------------------------------------------------
673 |
674 | smc_init(int unit)
675 | Input parameters:
676 | dev->base_addr == 0, try to find all possible locations
677 | dev->base_addr == 1, return failure code
678 | dev->base_addr == 2, always allocate space, and return success
679 | dev->base_addr == <anything else> this is the address to check
680 |
681 | Output:
682 | pointer to net_device or ERR_PTR(error)
683 |
684 ---------------------------------------------------------------------------
685*/
686static int io;
687static int irq;
688static int ifport;
689
690struct net_device * __init smc_init(int unit)
691{
692 struct net_device *dev = alloc_etherdev(sizeof(struct smc_local));
693 struct devlist *smcdev = smc_devlist;
694 int err = 0;
695
696 if (!dev)
697 return ERR_PTR(-ENODEV);
698
699 if (unit >= 0) {
700 sprintf(dev->name, "eth%d", unit);
701 netdev_boot_setup_check(dev);
702 io = dev->base_addr;
703 irq = dev->irq;
704 }
705
706 if (io > 0x1ff) { /* Check a single specified location. */
707 err = smc_probe(dev, io);
708 } else if (io != 0) { /* Don't probe at all. */
709 err = -ENXIO;
710 } else {
711 for (;smcdev->port; smcdev++) {
712 if (smc_probe(dev, smcdev->port) == 0)
713 break;
714 }
715 if (!smcdev->port)
716 err = -ENODEV;
717 }
718 if (err)
719 goto out;
720 err = register_netdev(dev);
721 if (err)
722 goto out1;
723 return dev;
724out1:
725 free_irq(dev->irq, dev);
726 release_region(dev->base_addr, SMC_IO_EXTENT);
727out:
728 free_netdev(dev);
729 return ERR_PTR(err);
730}
731
732/*----------------------------------------------------------------------
733 . smc_findirq
734 .
735 . This routine has a simple purpose -- make the SMC chip generate an
736 . interrupt, so an auto-detect routine can detect it, and find the IRQ,
737 ------------------------------------------------------------------------
738*/
739static int __init smc_findirq(int ioaddr)
740{
741#ifndef NO_AUTOPROBE
742 int timeout = 20;
743 unsigned long cookie;
744
745
746 cookie = probe_irq_on();
747
748 /*
749 * What I try to do here is trigger an ALLOC_INT. This is done
750 * by allocating a small chunk of memory, which will give an interrupt
751 * when done.
752 */
753
754
755 SMC_SELECT_BANK(2);
756 /* enable ALLOCation interrupts ONLY */
757 outb( IM_ALLOC_INT, ioaddr + INT_MASK );
758
759 /*
760 . Allocate 512 bytes of memory. Note that the chip was just
761 . reset so all the memory is available
762 */
763 outw( MC_ALLOC | 1, ioaddr + MMU_CMD );
764
765 /*
766 . Wait until positive that the interrupt has been generated
767 */
768 while ( timeout ) {
769 byte int_status;
770
771 int_status = inb( ioaddr + INTERRUPT );
772
773 if ( int_status & IM_ALLOC_INT )
774 break; /* got the interrupt */
775 timeout--;
776 }
777 /* there is really nothing that I can do here if timeout fails,
778 as probe_irq_off will return a 0 anyway, which is what I
779 want in this case. Plus, the clean up is needed in both
780 cases. */
781
782 /* DELAY HERE!
783 On a fast machine, the status might change before the interrupt
784 is given to the processor. This means that the interrupt was
785 never detected, and probe_irq_off fails to report anything.
786 This should fix probe_irq_* problems.
787 */
788 SMC_DELAY();
789 SMC_DELAY();
790
791 /* and disable all interrupts again */
792 outb( 0, ioaddr + INT_MASK );
793
794 /* and return what I found */
795 return probe_irq_off(cookie);
796#else /* NO_AUTOPROBE */
797 struct devlist *smcdev;
798 for (smcdev = smc_devlist; smcdev->port; smcdev++) {
799 if (smcdev->port == ioaddr)
800 return smcdev->irq;
801 }
802 return 0;
803#endif
804}
805
806static const struct net_device_ops smc_netdev_ops = {
807 .ndo_open = smc_open,
808 .ndo_stop = smc_close,
809 .ndo_start_xmit = smc_wait_to_send_packet,
810 .ndo_tx_timeout = smc_timeout,
811 .ndo_set_rx_mode = smc_set_multicast_list,
812 .ndo_change_mtu = eth_change_mtu,
813 .ndo_set_mac_address = eth_mac_addr,
814 .ndo_validate_addr = eth_validate_addr,
815};
816
817/*----------------------------------------------------------------------
818 . Function: smc_probe( int ioaddr )
819 .
820 . Purpose:
821 . Tests to see if a given ioaddr points to an SMC9xxx chip.
822 . Returns a 0 on success
823 .
824 . Algorithm:
825 . (1) see if the high byte of BANK_SELECT is 0x33
826 . (2) compare the ioaddr with the base register's address
827 . (3) see if I recognize the chip ID in the appropriate register
828 .
829 .---------------------------------------------------------------------
830 */
831
832/*---------------------------------------------------------------
833 . Here I do typical initialization tasks.
834 .
835 . o Initialize the structure if needed
836 . o print out my vanity message if not done so already
837 . o print out what type of hardware is detected
838 . o print out the ethernet address
839 . o find the IRQ
840 . o set up my private data
841 . o configure the dev structure with my subroutines
842 . o actually GRAB the irq.
843 . o GRAB the region
844 .-----------------------------------------------------------------
845*/
846static int __init smc_probe(struct net_device *dev, int ioaddr)
847{
848 int i, memory, retval;
849 unsigned int bank;
850
851 const char *version_string;
852 const char *if_string;
853
854 /* registers */
855 word revision_register;
856 word base_address_register;
857 word configuration_register;
858 word memory_info_register;
859 word memory_cfg_register;
860
861 /* Grab the region so that no one else tries to probe our ioports. */
862 if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
863 return -EBUSY;
864
865 dev->irq = irq;
866 dev->if_port = ifport;
867
868 /* First, see if the high byte is 0x33 */
869 bank = inw( ioaddr + BANK_SELECT );
870 if ( (bank & 0xFF00) != 0x3300 ) {
871 retval = -ENODEV;
872 goto err_out;
873 }
874 /* The above MIGHT indicate a device, but I need to write to further
875 test this. */
876 outw( 0x0, ioaddr + BANK_SELECT );
877 bank = inw( ioaddr + BANK_SELECT );
878 if ( (bank & 0xFF00 ) != 0x3300 ) {
879 retval = -ENODEV;
880 goto err_out;
881 }
882 /* well, we've already written once, so hopefully another time won't
883 hurt. This time, I need to switch the bank register to bank 1,
884 so I can access the base address register */
885 SMC_SELECT_BANK(1);
886 base_address_register = inw( ioaddr + BASE );
887 if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) {
888 printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). "
889 "Probably not a SMC chip\n",
890 ioaddr, base_address_register >> 3 & 0x3E0 );
891 /* well, the base address register didn't match. Must not have
892 been a SMC chip after all. */
893 retval = -ENODEV;
894 goto err_out;
895 }
896
897 /* check if the revision register is something that I recognize.
898 These might need to be added to later, as future revisions
899 could be added. */
900 SMC_SELECT_BANK(3);
901 revision_register = inw( ioaddr + REVISION );
902 if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) {
903 /* I don't recognize this chip, so... */
904 printk(CARDNAME ": IO %x: Unrecognized revision register:"
905 " %x, Contact author.\n", ioaddr, revision_register);
906
907 retval = -ENODEV;
908 goto err_out;
909 }
910
911 /* at this point I'll assume that the chip is an SMC9xxx.
912 It might be prudent to check a listing of MAC addresses
913 against the hardware address, or do some other tests. */
914
915 pr_info_once("%s\n", version);
916
917 /* fill in some of the fields */
918 dev->base_addr = ioaddr;
919
920 /*
921 . Get the MAC address ( bank 1, regs 4 - 9 )
922 */
923 SMC_SELECT_BANK( 1 );
924 for ( i = 0; i < 6; i += 2 ) {
925 word address;
926
927 address = inw( ioaddr + ADDR0 + i );
928 dev->dev_addr[ i + 1] = address >> 8;
929 dev->dev_addr[ i ] = address & 0xFF;
930 }
931
932 /* get the memory information */
933
934 SMC_SELECT_BANK( 0 );
935 memory_info_register = inw( ioaddr + MIR );
936 memory_cfg_register = inw( ioaddr + MCR );
937 memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */
938 memory *= 256 * ( memory_info_register & 0xFF );
939
940 /*
941 Now, I want to find out more about the chip. This is sort of
942 redundant, but it's cleaner to have it in both, rather than having
943 one VERY long probe procedure.
944 */
945 SMC_SELECT_BANK(3);
946 revision_register = inw( ioaddr + REVISION );
947 version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ];
948 if ( !version_string ) {
949 /* I shouldn't get here because this call was done before.... */
950 retval = -ENODEV;
951 goto err_out;
952 }
953
954 /* is it using AUI or 10BaseT ? */
955 if ( dev->if_port == 0 ) {
956 SMC_SELECT_BANK(1);
957 configuration_register = inw( ioaddr + CONFIG );
958 if ( configuration_register & CFG_AUI_SELECT )
959 dev->if_port = 2;
960 else
961 dev->if_port = 1;
962 }
963 if_string = interfaces[ dev->if_port - 1 ];
964
965 /* now, reset the chip, and put it into a known state */
966 smc_reset( ioaddr );
967
968 /*
969 . If dev->irq is 0, then the device has to be banged on to see
970 . what the IRQ is.
971 .
972 . This banging doesn't always detect the IRQ, for unknown reasons.
973 . a workaround is to reset the chip and try again.
974 .
975 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to
976 . be what is requested on the command line. I don't do that, mostly
977 . because the card that I have uses a non-standard method of accessing
978 . the IRQs, and because this _should_ work in most configurations.
979 .
980 . Specifying an IRQ is done with the assumption that the user knows
981 . what (s)he is doing. No checking is done!!!!
982 .
983 */
984 if ( dev->irq < 2 ) {
985 int trials;
986
987 trials = 3;
988 while ( trials-- ) {
989 dev->irq = smc_findirq( ioaddr );
990 if ( dev->irq )
991 break;
992 /* kick the card and try again */
993 smc_reset( ioaddr );
994 }
995 }
996 if (dev->irq == 0 ) {
997 printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
998 retval = -ENODEV;
999 goto err_out;
1000 }
1001
1002 /* now, print out the card info, in a short format.. */
1003
1004 netdev_info(dev, "%s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ",
1005 version_string, revision_register & 0xF, ioaddr, dev->irq,
1006 if_string, memory);
1007 /*
1008 . Print the Ethernet address
1009 */
1010 netdev_info(dev, "ADDR: %pM\n", dev->dev_addr);
1011
1012 /* Grab the IRQ */
1013 retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev);
1014 if (retval) {
1015 netdev_warn(dev, "%s: unable to get IRQ %d (irqval=%d).\n",
1016 DRV_NAME, dev->irq, retval);
1017 goto err_out;
1018 }
1019
1020 dev->netdev_ops = &smc_netdev_ops;
1021 dev->watchdog_timeo = HZ/20;
1022
1023 return 0;
1024
1025err_out:
1026 release_region(ioaddr, SMC_IO_EXTENT);
1027 return retval;
1028}
1029
1030#if SMC_DEBUG > 2
1031static void print_packet( byte * buf, int length )
1032{
1033#if 0
1034 print_hex_dump_debug(DRV_NAME, DUMP_PREFIX_OFFSET, 16, 1,
1035 buf, length, true);
1036#endif
1037}
1038#endif
1039
1040
1041/*
1042 * Open and Initialize the board
1043 *
1044 * Set up everything, reset the card, etc ..
1045 *
1046 */
1047static int smc_open(struct net_device *dev)
1048{
1049 int ioaddr = dev->base_addr;
1050
1051 int i; /* used to set hw ethernet address */
1052
1053 /* clear out all the junk that was put here before... */
1054 memset(netdev_priv(dev), 0, sizeof(struct smc_local));
1055
1056 /* reset the hardware */
1057
1058 smc_reset( ioaddr );
1059 smc_enable( ioaddr );
1060
1061 /* Select which interface to use */
1062
1063 SMC_SELECT_BANK( 1 );
1064 if ( dev->if_port == 1 ) {
1065 outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
1066 ioaddr + CONFIG );
1067 }
1068 else if ( dev->if_port == 2 ) {
1069 outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
1070 ioaddr + CONFIG );
1071 }
1072
1073 /*
1074 According to Becker, I have to set the hardware address
1075 at this point, because the (l)user can set it with an
1076 ioctl. Easily done...
1077 */
1078 SMC_SELECT_BANK( 1 );
1079 for ( i = 0; i < 6; i += 2 ) {
1080 word address;
1081
1082 address = dev->dev_addr[ i + 1 ] << 8 ;
1083 address |= dev->dev_addr[ i ];
1084 outw( address, ioaddr + ADDR0 + i );
1085 }
1086
1087 netif_start_queue(dev);
1088 return 0;
1089}
1090
1091/*--------------------------------------------------------
1092 . Called by the kernel to send a packet out into the void
1093 . of the net. This routine is largely based on
1094 . skeleton.c, from Becker.
1095 .--------------------------------------------------------
1096*/
1097
1098static void smc_timeout(struct net_device *dev)
1099{
1100 /* If we get here, some higher level has decided we are broken.
1101 There should really be a "kick me" function call instead. */
1102 netdev_warn(dev, CARDNAME": transmit timed out, %s?\n",
1103 tx_done(dev) ? "IRQ conflict" : "network cable problem");
1104 /* "kick" the adaptor */
1105 smc_reset( dev->base_addr );
1106 smc_enable( dev->base_addr );
1107 dev->trans_start = jiffies; /* prevent tx timeout */
1108 /* clear anything saved */
1109 ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL;
1110 netif_wake_queue(dev);
1111}
1112
1113/*-------------------------------------------------------------
1114 .
1115 . smc_rcv - receive a packet from the card
1116 .
1117 . There is ( at least ) a packet waiting to be read from
1118 . chip-memory.
1119 .
1120 . o Read the status
1121 . o If an error, record it
1122 . o otherwise, read in the packet
1123 --------------------------------------------------------------
1124*/
1125static void smc_rcv(struct net_device *dev)
1126{
1127 int ioaddr = dev->base_addr;
1128 int packet_number;
1129 word status;
1130 word packet_length;
1131
1132 /* assume bank 2 */
1133
1134 packet_number = inw( ioaddr + FIFO_PORTS );
1135
1136 if ( packet_number & FP_RXEMPTY ) {
1137 /* we got called , but nothing was on the FIFO */
1138 PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n"));
1139 /* don't need to restore anything */
1140 return;
1141 }
1142
1143 /* start reading from the start of the packet */
1144 outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
1145
1146 /* First two words are status and packet_length */
1147 status = inw( ioaddr + DATA_1 );
1148 packet_length = inw( ioaddr + DATA_1 );
1149
1150 packet_length &= 0x07ff; /* mask off top bits */
1151
1152 PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
1153 /*
1154 . the packet length contains 3 extra words :
1155 . status, length, and an extra word with an odd byte .
1156 */
1157 packet_length -= 6;
1158
1159 if ( !(status & RS_ERRORS ) ){
1160 /* do stuff to make a new packet */
1161 struct sk_buff * skb;
1162 byte * data;
1163
1164 /* read one extra byte */
1165 if ( status & RS_ODDFRAME )
1166 packet_length++;
1167
1168 /* set multicast stats */
1169 if ( status & RS_MULTICAST )
1170 dev->stats.multicast++;
1171
1172 skb = netdev_alloc_skb(dev, packet_length + 5);
1173 if ( skb == NULL ) {
1174 dev->stats.rx_dropped++;
1175 goto done;
1176 }
1177
1178 /*
1179 ! This should work without alignment, but it could be
1180 ! in the worse case
1181 */
1182
1183 skb_reserve( skb, 2 ); /* 16 bit alignment */
1184
1185 data = skb_put( skb, packet_length);
1186
1187#ifdef USE_32_BIT
1188 /* QUESTION: Like in the TX routine, do I want
1189 to send the DWORDs or the bytes first, or some
1190 mixture. A mixture might improve already slow PIO
1191 performance */
1192 PRINTK3((" Reading %d dwords (and %d bytes)\n",
1193 packet_length >> 2, packet_length & 3 ));
1194 insl(ioaddr + DATA_1 , data, packet_length >> 2 );
1195 /* read the left over bytes */
1196 insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
1197 packet_length & 0x3 );
1198#else
1199 PRINTK3((" Reading %d words and %d byte(s)\n",
1200 (packet_length >> 1 ), packet_length & 1 ));
1201 insw(ioaddr + DATA_1 , data, packet_length >> 1);
1202 if ( packet_length & 1 ) {
1203 data += packet_length & ~1;
1204 *(data++) = inb( ioaddr + DATA_1 );
1205 }
1206#endif
1207#if SMC_DEBUG > 2
1208 print_packet( data, packet_length );
1209#endif
1210
1211 skb->protocol = eth_type_trans(skb, dev );
1212 netif_rx(skb);
1213 dev->stats.rx_packets++;
1214 dev->stats.rx_bytes += packet_length;
1215 } else {
1216 /* error ... */
1217 dev->stats.rx_errors++;
1218
1219 if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++;
1220 if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
1221 dev->stats.rx_length_errors++;
1222 if ( status & RS_BADCRC) dev->stats.rx_crc_errors++;
1223 }
1224
1225done:
1226 /* error or good, tell the card to get rid of this packet */
1227 outw( MC_RELEASE, ioaddr + MMU_CMD );
1228}
1229
1230
1231/*************************************************************************
1232 . smc_tx
1233 .
1234 . Purpose: Handle a transmit error message. This will only be called
1235 . when an error, because of the AUTO_RELEASE mode.
1236 .
1237 . Algorithm:
1238 . Save pointer and packet no
1239 . Get the packet no from the top of the queue
1240 . check if it's valid ( if not, is this an error??? )
1241 . read the status word
1242 . record the error
1243 . ( resend? Not really, since we don't want old packets around )
1244 . Restore saved values
1245 ************************************************************************/
1246static void smc_tx( struct net_device * dev )
1247{
1248 int ioaddr = dev->base_addr;
1249 struct smc_local *lp = netdev_priv(dev);
1250 byte saved_packet;
1251 byte packet_no;
1252 word tx_status;
1253
1254
1255 /* assume bank 2 */
1256
1257 saved_packet = inb( ioaddr + PNR_ARR );
1258 packet_no = inw( ioaddr + FIFO_PORTS );
1259 packet_no &= 0x7F;
1260
1261 /* select this as the packet to read from */
1262 outb( packet_no, ioaddr + PNR_ARR );
1263
1264 /* read the first word from this packet */
1265 outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
1266
1267 tx_status = inw( ioaddr + DATA_1 );
1268 PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status));
1269
1270 dev->stats.tx_errors++;
1271 if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
1272 if ( tx_status & TS_LATCOL ) {
1273 netdev_dbg(dev, CARDNAME": Late collision occurred on last xmit.\n");
1274 dev->stats.tx_window_errors++;
1275 }
1276#if 0
1277 if ( tx_status & TS_16COL ) { ... }
1278#endif
1279
1280 if ( tx_status & TS_SUCCESS ) {
1281 netdev_info(dev, CARDNAME": Successful packet caused interrupt\n");
1282 }
1283 /* re-enable transmit */
1284 SMC_SELECT_BANK( 0 );
1285 outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
1286
1287 /* kill the packet */
1288 SMC_SELECT_BANK( 2 );
1289 outw( MC_FREEPKT, ioaddr + MMU_CMD );
1290
1291 /* one less packet waiting for me */
1292 lp->packets_waiting--;
1293
1294 outb( saved_packet, ioaddr + PNR_ARR );
1295}
1296
1297/*--------------------------------------------------------------------
1298 .
1299 . This is the main routine of the driver, to handle the device when
1300 . it needs some attention.
1301 .
1302 . So:
1303 . first, save state of the chipset
1304 . branch off into routines to handle each case, and acknowledge
1305 . each to the interrupt register
1306 . and finally restore state.
1307 .
1308 ---------------------------------------------------------------------*/
1309
1310static irqreturn_t smc_interrupt(int irq, void * dev_id)
1311{
1312 struct net_device *dev = dev_id;
1313 int ioaddr = dev->base_addr;
1314 struct smc_local *lp = netdev_priv(dev);
1315
1316 byte status;
1317 word card_stats;
1318 byte mask;
1319 int timeout;
1320 /* state registers */
1321 word saved_bank;
1322 word saved_pointer;
1323 int handled = 0;
1324
1325
1326 PRINTK3((CARDNAME": SMC interrupt started\n"));
1327
1328 saved_bank = inw( ioaddr + BANK_SELECT );
1329
1330 SMC_SELECT_BANK(2);
1331 saved_pointer = inw( ioaddr + POINTER );
1332
1333 mask = inb( ioaddr + INT_MASK );
1334 /* clear all interrupts */
1335 outb( 0, ioaddr + INT_MASK );
1336
1337
1338 /* set a timeout value, so I don't stay here forever */
1339 timeout = 4;
1340
1341 PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask));
1342 do {
1343 /* read the status flag, and mask it */
1344 status = inb( ioaddr + INTERRUPT ) & mask;
1345 if (!status )
1346 break;
1347
1348 handled = 1;
1349
1350 PRINTK3((KERN_WARNING CARDNAME
1351 ": Handling interrupt status %x\n", status));
1352
1353 if (status & IM_RCV_INT) {
1354 /* Got a packet(s). */
1355 PRINTK2((KERN_WARNING CARDNAME
1356 ": Receive Interrupt\n"));
1357 smc_rcv(dev);
1358 } else if (status & IM_TX_INT ) {
1359 PRINTK2((KERN_WARNING CARDNAME
1360 ": TX ERROR handled\n"));
1361 smc_tx(dev);
1362 outb(IM_TX_INT, ioaddr + INTERRUPT );
1363 } else if (status & IM_TX_EMPTY_INT ) {
1364 /* update stats */
1365 SMC_SELECT_BANK( 0 );
1366 card_stats = inw( ioaddr + COUNTER );
1367 /* single collisions */
1368 dev->stats.collisions += card_stats & 0xF;
1369 card_stats >>= 4;
1370 /* multiple collisions */
1371 dev->stats.collisions += card_stats & 0xF;
1372
1373 /* these are for when linux supports these statistics */
1374
1375 SMC_SELECT_BANK( 2 );
1376 PRINTK2((KERN_WARNING CARDNAME
1377 ": TX_BUFFER_EMPTY handled\n"));
1378 outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
1379 mask &= ~IM_TX_EMPTY_INT;
1380 dev->stats.tx_packets += lp->packets_waiting;
1381 lp->packets_waiting = 0;
1382
1383 } else if (status & IM_ALLOC_INT ) {
1384 PRINTK2((KERN_DEBUG CARDNAME
1385 ": Allocation interrupt\n"));
1386 /* clear this interrupt so it doesn't happen again */
1387 mask &= ~IM_ALLOC_INT;
1388
1389 smc_hardware_send_packet( dev );
1390
1391 /* enable xmit interrupts based on this */
1392 mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
1393
1394 /* and let the card send more packets to me */
1395 netif_wake_queue(dev);
1396
1397 PRINTK2((CARDNAME": Handoff done successfully.\n"));
1398 } else if (status & IM_RX_OVRN_INT ) {
1399 dev->stats.rx_errors++;
1400 dev->stats.rx_fifo_errors++;
1401 outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
1402 } else if (status & IM_EPH_INT ) {
1403 PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n"));
1404 } else if (status & IM_ERCV_INT ) {
1405 PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n"));
1406 outb( IM_ERCV_INT, ioaddr + INTERRUPT );
1407 }
1408 } while ( timeout -- );
1409
1410
1411 /* restore state register */
1412 SMC_SELECT_BANK( 2 );
1413 outb( mask, ioaddr + INT_MASK );
1414
1415 PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask));
1416 outw( saved_pointer, ioaddr + POINTER );
1417
1418 SMC_SELECT_BANK( saved_bank );
1419
1420 PRINTK3((CARDNAME ": Interrupt done\n"));
1421 return IRQ_RETVAL(handled);
1422}
1423
1424
1425/*----------------------------------------------------
1426 . smc_close
1427 .
1428 . this makes the board clean up everything that it can
1429 . and not talk to the outside world. Caused by
1430 . an 'ifconfig ethX down'
1431 .
1432 -----------------------------------------------------*/
1433static int smc_close(struct net_device *dev)
1434{
1435 netif_stop_queue(dev);
1436 /* clear everything */
1437 smc_shutdown( dev->base_addr );
1438
1439 /* Update the statistics here. */
1440 return 0;
1441}
1442
1443/*-----------------------------------------------------------
1444 . smc_set_multicast_list
1445 .
1446 . This routine will, depending on the values passed to it,
1447 . either make it accept multicast packets, go into
1448 . promiscuous mode ( for TCPDUMP and cousins ) or accept
1449 . a select set of multicast packets
1450*/
1451static void smc_set_multicast_list(struct net_device *dev)
1452{
1453 short ioaddr = dev->base_addr;
1454
1455 SMC_SELECT_BANK(0);
1456 if ( dev->flags & IFF_PROMISC )
1457 outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
1458
1459/* BUG? I never disable promiscuous mode if multicasting was turned on.
1460 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1461 when promiscuous mode is turned on.
1462*/
1463
1464 /* Here, I am setting this to accept all multicast packets.
1465 I don't need to zero the multicast table, because the flag is
1466 checked before the table is
1467 */
1468 else if (dev->flags & IFF_ALLMULTI)
1469 outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
1470
1471 /* We just get all multicast packets even if we only want them
1472 . from one source. This will be changed at some future
1473 . point. */
1474 else if (!netdev_mc_empty(dev)) {
1475 /* support hardware multicasting */
1476
1477 /* be sure I get rid of flags I might have set */
1478 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1479 ioaddr + RCR );
1480 /* NOTE: this has to set the bank, so make sure it is the
1481 last thing called. The bank is set to zero at the top */
1482 smc_setmulticast(ioaddr, dev);
1483 }
1484 else {
1485 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1486 ioaddr + RCR );
1487
1488 /*
1489 since I'm disabling all multicast entirely, I need to
1490 clear the multicast list
1491 */
1492 SMC_SELECT_BANK( 3 );
1493 outw( 0, ioaddr + MULTICAST1 );
1494 outw( 0, ioaddr + MULTICAST2 );
1495 outw( 0, ioaddr + MULTICAST3 );
1496 outw( 0, ioaddr + MULTICAST4 );
1497 }
1498}
1499
1500#ifdef MODULE
1501
1502static struct net_device *devSMC9194;
1503MODULE_LICENSE("GPL");
1504
1505module_param(io, int, 0);
1506module_param(irq, int, 0);
1507module_param(ifport, int, 0);
1508MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
1509MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
1510MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
1511
1512int __init init_module(void)
1513{
1514 if (io == 0)
1515 printk(KERN_WARNING
1516 CARDNAME": You shouldn't use auto-probing with insmod!\n" );
1517
1518 /* copy the parameters from insmod into the device structure */
1519 devSMC9194 = smc_init(-1);
1520 return PTR_ERR_OR_ZERO(devSMC9194);
1521}
1522
1523void __exit cleanup_module(void)
1524{
1525 unregister_netdev(devSMC9194);
1526 free_irq(devSMC9194->irq, devSMC9194);
1527 release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
1528 free_netdev(devSMC9194);
1529}
1530
1531#endif /* MODULE */