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
57 static 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
104 struct devlist {
105 unsigned int port;
106 unsigned int irq;
107 };
108
109 static 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.. */
176 struct 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 */
208 struct 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 */
214 static int smc_open(struct net_device *dev);
215
216 /*
217 . Our watchdog timed out. Called by the networking layer
218 */
219 static 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 */
226 static 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 */
232 static 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 */
244 static 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 */
249 static 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 */
254 static 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 */
268 static 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
274 static 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 */
280 static 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 */
286 static 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 */
290 static void smc_reset( int ioaddr );
291
292 /* Enable Interrupts, Receive, and Transmit */
293 static void smc_enable( int ioaddr );
294
295 /* this puts the device in an inactive state */
296 static 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. */
300 static 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 */
smc_reset(int ioaddr)319 static 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 */
smc_enable(int ioaddr)359 static 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 */
smc_shutdown(int ioaddr)385 static 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
smc_setmulticast(int ioaddr,struct net_device * dev)421 static 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 */
smc_wait_to_send_packet(struct sk_buff * skb,struct net_device * dev)467 static 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 */
smc_hardware_send_packet(struct net_device * dev)578 static 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 netif_trans_update(dev);
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 */
686 static int io;
687 static int irq;
688 static int ifport;
689
smc_init(int unit)690 struct 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;
724 out1:
725 free_irq(dev->irq, dev);
726 release_region(dev->base_addr, SMC_IO_EXTENT);
727 out:
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 */
smc_findirq(int ioaddr)739 static 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
806 static 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_set_mac_address = eth_mac_addr,
813 .ndo_validate_addr = eth_validate_addr,
814 };
815
816 /*----------------------------------------------------------------------
817 . Function: smc_probe( int ioaddr )
818 .
819 . Purpose:
820 . Tests to see if a given ioaddr points to an SMC9xxx chip.
821 . Returns a 0 on success
822 .
823 . Algorithm:
824 . (1) see if the high byte of BANK_SELECT is 0x33
825 . (2) compare the ioaddr with the base register's address
826 . (3) see if I recognize the chip ID in the appropriate register
827 .
828 .---------------------------------------------------------------------
829 */
830
831 /*---------------------------------------------------------------
832 . Here I do typical initialization tasks.
833 .
834 . o Initialize the structure if needed
835 . o print out my vanity message if not done so already
836 . o print out what type of hardware is detected
837 . o print out the ethernet address
838 . o find the IRQ
839 . o set up my private data
840 . o configure the dev structure with my subroutines
841 . o actually GRAB the irq.
842 . o GRAB the region
843 .-----------------------------------------------------------------
844 */
smc_probe(struct net_device * dev,int ioaddr)845 static int __init smc_probe(struct net_device *dev, int ioaddr)
846 {
847 int i, memory, retval;
848 unsigned int bank;
849
850 const char *version_string;
851 const char *if_string;
852
853 /* registers */
854 word revision_register;
855 word base_address_register;
856 word configuration_register;
857 word memory_info_register;
858 word memory_cfg_register;
859
860 /* Grab the region so that no one else tries to probe our ioports. */
861 if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
862 return -EBUSY;
863
864 dev->irq = irq;
865 dev->if_port = ifport;
866
867 /* First, see if the high byte is 0x33 */
868 bank = inw( ioaddr + BANK_SELECT );
869 if ( (bank & 0xFF00) != 0x3300 ) {
870 retval = -ENODEV;
871 goto err_out;
872 }
873 /* The above MIGHT indicate a device, but I need to write to further
874 test this. */
875 outw( 0x0, ioaddr + BANK_SELECT );
876 bank = inw( ioaddr + BANK_SELECT );
877 if ( (bank & 0xFF00 ) != 0x3300 ) {
878 retval = -ENODEV;
879 goto err_out;
880 }
881 /* well, we've already written once, so hopefully another time won't
882 hurt. This time, I need to switch the bank register to bank 1,
883 so I can access the base address register */
884 SMC_SELECT_BANK(1);
885 base_address_register = inw( ioaddr + BASE );
886 if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) {
887 printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). "
888 "Probably not a SMC chip\n",
889 ioaddr, base_address_register >> 3 & 0x3E0 );
890 /* well, the base address register didn't match. Must not have
891 been a SMC chip after all. */
892 retval = -ENODEV;
893 goto err_out;
894 }
895
896 /* check if the revision register is something that I recognize.
897 These might need to be added to later, as future revisions
898 could be added. */
899 SMC_SELECT_BANK(3);
900 revision_register = inw( ioaddr + REVISION );
901 if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) {
902 /* I don't recognize this chip, so... */
903 printk(CARDNAME ": IO %x: Unrecognized revision register:"
904 " %x, Contact author.\n", ioaddr, revision_register);
905
906 retval = -ENODEV;
907 goto err_out;
908 }
909
910 /* at this point I'll assume that the chip is an SMC9xxx.
911 It might be prudent to check a listing of MAC addresses
912 against the hardware address, or do some other tests. */
913
914 pr_info_once("%s\n", version);
915
916 /* fill in some of the fields */
917 dev->base_addr = ioaddr;
918
919 /*
920 . Get the MAC address ( bank 1, regs 4 - 9 )
921 */
922 SMC_SELECT_BANK( 1 );
923 for ( i = 0; i < 6; i += 2 ) {
924 word address;
925
926 address = inw( ioaddr + ADDR0 + i );
927 dev->dev_addr[ i + 1] = address >> 8;
928 dev->dev_addr[ i ] = address & 0xFF;
929 }
930
931 /* get the memory information */
932
933 SMC_SELECT_BANK( 0 );
934 memory_info_register = inw( ioaddr + MIR );
935 memory_cfg_register = inw( ioaddr + MCR );
936 memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */
937 memory *= 256 * ( memory_info_register & 0xFF );
938
939 /*
940 Now, I want to find out more about the chip. This is sort of
941 redundant, but it's cleaner to have it in both, rather than having
942 one VERY long probe procedure.
943 */
944 SMC_SELECT_BANK(3);
945 revision_register = inw( ioaddr + REVISION );
946 version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ];
947 if ( !version_string ) {
948 /* I shouldn't get here because this call was done before.... */
949 retval = -ENODEV;
950 goto err_out;
951 }
952
953 /* is it using AUI or 10BaseT ? */
954 if ( dev->if_port == 0 ) {
955 SMC_SELECT_BANK(1);
956 configuration_register = inw( ioaddr + CONFIG );
957 if ( configuration_register & CFG_AUI_SELECT )
958 dev->if_port = 2;
959 else
960 dev->if_port = 1;
961 }
962 if_string = interfaces[ dev->if_port - 1 ];
963
964 /* now, reset the chip, and put it into a known state */
965 smc_reset( ioaddr );
966
967 /*
968 . If dev->irq is 0, then the device has to be banged on to see
969 . what the IRQ is.
970 .
971 . This banging doesn't always detect the IRQ, for unknown reasons.
972 . a workaround is to reset the chip and try again.
973 .
974 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to
975 . be what is requested on the command line. I don't do that, mostly
976 . because the card that I have uses a non-standard method of accessing
977 . the IRQs, and because this _should_ work in most configurations.
978 .
979 . Specifying an IRQ is done with the assumption that the user knows
980 . what (s)he is doing. No checking is done!!!!
981 .
982 */
983 if ( dev->irq < 2 ) {
984 int trials;
985
986 trials = 3;
987 while ( trials-- ) {
988 dev->irq = smc_findirq( ioaddr );
989 if ( dev->irq )
990 break;
991 /* kick the card and try again */
992 smc_reset( ioaddr );
993 }
994 }
995 if (dev->irq == 0 ) {
996 printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
997 retval = -ENODEV;
998 goto err_out;
999 }
1000
1001 /* now, print out the card info, in a short format.. */
1002
1003 netdev_info(dev, "%s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ",
1004 version_string, revision_register & 0xF, ioaddr, dev->irq,
1005 if_string, memory);
1006 /*
1007 . Print the Ethernet address
1008 */
1009 netdev_info(dev, "ADDR: %pM\n", dev->dev_addr);
1010
1011 /* Grab the IRQ */
1012 retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev);
1013 if (retval) {
1014 netdev_warn(dev, "%s: unable to get IRQ %d (irqval=%d).\n",
1015 DRV_NAME, dev->irq, retval);
1016 goto err_out;
1017 }
1018
1019 dev->netdev_ops = &smc_netdev_ops;
1020 dev->watchdog_timeo = HZ/20;
1021
1022 return 0;
1023
1024 err_out:
1025 release_region(ioaddr, SMC_IO_EXTENT);
1026 return retval;
1027 }
1028
1029 #if SMC_DEBUG > 2
print_packet(byte * buf,int length)1030 static void print_packet( byte * buf, int length )
1031 {
1032 #if 0
1033 print_hex_dump_debug(DRV_NAME, DUMP_PREFIX_OFFSET, 16, 1,
1034 buf, length, true);
1035 #endif
1036 }
1037 #endif
1038
1039
1040 /*
1041 * Open and Initialize the board
1042 *
1043 * Set up everything, reset the card, etc ..
1044 *
1045 */
smc_open(struct net_device * dev)1046 static int smc_open(struct net_device *dev)
1047 {
1048 int ioaddr = dev->base_addr;
1049
1050 int i; /* used to set hw ethernet address */
1051
1052 /* clear out all the junk that was put here before... */
1053 memset(netdev_priv(dev), 0, sizeof(struct smc_local));
1054
1055 /* reset the hardware */
1056
1057 smc_reset( ioaddr );
1058 smc_enable( ioaddr );
1059
1060 /* Select which interface to use */
1061
1062 SMC_SELECT_BANK( 1 );
1063 if ( dev->if_port == 1 ) {
1064 outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
1065 ioaddr + CONFIG );
1066 }
1067 else if ( dev->if_port == 2 ) {
1068 outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
1069 ioaddr + CONFIG );
1070 }
1071
1072 /*
1073 According to Becker, I have to set the hardware address
1074 at this point, because the (l)user can set it with an
1075 ioctl. Easily done...
1076 */
1077 SMC_SELECT_BANK( 1 );
1078 for ( i = 0; i < 6; i += 2 ) {
1079 word address;
1080
1081 address = dev->dev_addr[ i + 1 ] << 8 ;
1082 address |= dev->dev_addr[ i ];
1083 outw( address, ioaddr + ADDR0 + i );
1084 }
1085
1086 netif_start_queue(dev);
1087 return 0;
1088 }
1089
1090 /*--------------------------------------------------------
1091 . Called by the kernel to send a packet out into the void
1092 . of the net. This routine is largely based on
1093 . skeleton.c, from Becker.
1094 .--------------------------------------------------------
1095 */
1096
smc_timeout(struct net_device * dev)1097 static void smc_timeout(struct net_device *dev)
1098 {
1099 /* If we get here, some higher level has decided we are broken.
1100 There should really be a "kick me" function call instead. */
1101 netdev_warn(dev, CARDNAME": transmit timed out, %s?\n",
1102 tx_done(dev) ? "IRQ conflict" : "network cable problem");
1103 /* "kick" the adaptor */
1104 smc_reset( dev->base_addr );
1105 smc_enable( dev->base_addr );
1106 netif_trans_update(dev); /* prevent tx timeout */
1107 /* clear anything saved */
1108 ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL;
1109 netif_wake_queue(dev);
1110 }
1111
1112 /*-------------------------------------------------------------
1113 .
1114 . smc_rcv - receive a packet from the card
1115 .
1116 . There is ( at least ) a packet waiting to be read from
1117 . chip-memory.
1118 .
1119 . o Read the status
1120 . o If an error, record it
1121 . o otherwise, read in the packet
1122 --------------------------------------------------------------
1123 */
smc_rcv(struct net_device * dev)1124 static void smc_rcv(struct net_device *dev)
1125 {
1126 int ioaddr = dev->base_addr;
1127 int packet_number;
1128 word status;
1129 word packet_length;
1130
1131 /* assume bank 2 */
1132
1133 packet_number = inw( ioaddr + FIFO_PORTS );
1134
1135 if ( packet_number & FP_RXEMPTY ) {
1136 /* we got called , but nothing was on the FIFO */
1137 PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n"));
1138 /* don't need to restore anything */
1139 return;
1140 }
1141
1142 /* start reading from the start of the packet */
1143 outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
1144
1145 /* First two words are status and packet_length */
1146 status = inw( ioaddr + DATA_1 );
1147 packet_length = inw( ioaddr + DATA_1 );
1148
1149 packet_length &= 0x07ff; /* mask off top bits */
1150
1151 PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
1152 /*
1153 . the packet length contains 3 extra words :
1154 . status, length, and an extra word with an odd byte .
1155 */
1156 packet_length -= 6;
1157
1158 if ( !(status & RS_ERRORS ) ){
1159 /* do stuff to make a new packet */
1160 struct sk_buff * skb;
1161 byte * data;
1162
1163 /* read one extra byte */
1164 if ( status & RS_ODDFRAME )
1165 packet_length++;
1166
1167 /* set multicast stats */
1168 if ( status & RS_MULTICAST )
1169 dev->stats.multicast++;
1170
1171 skb = netdev_alloc_skb(dev, packet_length + 5);
1172 if ( skb == NULL ) {
1173 dev->stats.rx_dropped++;
1174 goto done;
1175 }
1176
1177 /*
1178 ! This should work without alignment, but it could be
1179 ! in the worse case
1180 */
1181
1182 skb_reserve( skb, 2 ); /* 16 bit alignment */
1183
1184 data = skb_put( skb, packet_length);
1185
1186 #ifdef USE_32_BIT
1187 /* QUESTION: Like in the TX routine, do I want
1188 to send the DWORDs or the bytes first, or some
1189 mixture. A mixture might improve already slow PIO
1190 performance */
1191 PRINTK3((" Reading %d dwords (and %d bytes)\n",
1192 packet_length >> 2, packet_length & 3 ));
1193 insl(ioaddr + DATA_1 , data, packet_length >> 2 );
1194 /* read the left over bytes */
1195 insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
1196 packet_length & 0x3 );
1197 #else
1198 PRINTK3((" Reading %d words and %d byte(s)\n",
1199 (packet_length >> 1 ), packet_length & 1 ));
1200 insw(ioaddr + DATA_1 , data, packet_length >> 1);
1201 if ( packet_length & 1 ) {
1202 data += packet_length & ~1;
1203 *(data++) = inb( ioaddr + DATA_1 );
1204 }
1205 #endif
1206 #if SMC_DEBUG > 2
1207 print_packet( data, packet_length );
1208 #endif
1209
1210 skb->protocol = eth_type_trans(skb, dev );
1211 netif_rx(skb);
1212 dev->stats.rx_packets++;
1213 dev->stats.rx_bytes += packet_length;
1214 } else {
1215 /* error ... */
1216 dev->stats.rx_errors++;
1217
1218 if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++;
1219 if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
1220 dev->stats.rx_length_errors++;
1221 if ( status & RS_BADCRC) dev->stats.rx_crc_errors++;
1222 }
1223
1224 done:
1225 /* error or good, tell the card to get rid of this packet */
1226 outw( MC_RELEASE, ioaddr + MMU_CMD );
1227 }
1228
1229
1230 /*************************************************************************
1231 . smc_tx
1232 .
1233 . Purpose: Handle a transmit error message. This will only be called
1234 . when an error, because of the AUTO_RELEASE mode.
1235 .
1236 . Algorithm:
1237 . Save pointer and packet no
1238 . Get the packet no from the top of the queue
1239 . check if it's valid ( if not, is this an error??? )
1240 . read the status word
1241 . record the error
1242 . ( resend? Not really, since we don't want old packets around )
1243 . Restore saved values
1244 ************************************************************************/
smc_tx(struct net_device * dev)1245 static void smc_tx( struct net_device * dev )
1246 {
1247 int ioaddr = dev->base_addr;
1248 struct smc_local *lp = netdev_priv(dev);
1249 byte saved_packet;
1250 byte packet_no;
1251 word tx_status;
1252
1253
1254 /* assume bank 2 */
1255
1256 saved_packet = inb( ioaddr + PNR_ARR );
1257 packet_no = inw( ioaddr + FIFO_PORTS );
1258 packet_no &= 0x7F;
1259
1260 /* select this as the packet to read from */
1261 outb( packet_no, ioaddr + PNR_ARR );
1262
1263 /* read the first word from this packet */
1264 outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
1265
1266 tx_status = inw( ioaddr + DATA_1 );
1267 PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status));
1268
1269 dev->stats.tx_errors++;
1270 if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
1271 if ( tx_status & TS_LATCOL ) {
1272 netdev_dbg(dev, CARDNAME": Late collision occurred on last xmit.\n");
1273 dev->stats.tx_window_errors++;
1274 }
1275 #if 0
1276 if ( tx_status & TS_16COL ) { ... }
1277 #endif
1278
1279 if ( tx_status & TS_SUCCESS ) {
1280 netdev_info(dev, CARDNAME": Successful packet caused interrupt\n");
1281 }
1282 /* re-enable transmit */
1283 SMC_SELECT_BANK( 0 );
1284 outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
1285
1286 /* kill the packet */
1287 SMC_SELECT_BANK( 2 );
1288 outw( MC_FREEPKT, ioaddr + MMU_CMD );
1289
1290 /* one less packet waiting for me */
1291 lp->packets_waiting--;
1292
1293 outb( saved_packet, ioaddr + PNR_ARR );
1294 }
1295
1296 /*--------------------------------------------------------------------
1297 .
1298 . This is the main routine of the driver, to handle the device when
1299 . it needs some attention.
1300 .
1301 . So:
1302 . first, save state of the chipset
1303 . branch off into routines to handle each case, and acknowledge
1304 . each to the interrupt register
1305 . and finally restore state.
1306 .
1307 ---------------------------------------------------------------------*/
1308
smc_interrupt(int irq,void * dev_id)1309 static irqreturn_t smc_interrupt(int irq, void * dev_id)
1310 {
1311 struct net_device *dev = dev_id;
1312 int ioaddr = dev->base_addr;
1313 struct smc_local *lp = netdev_priv(dev);
1314
1315 byte status;
1316 word card_stats;
1317 byte mask;
1318 int timeout;
1319 /* state registers */
1320 word saved_bank;
1321 word saved_pointer;
1322 int handled = 0;
1323
1324
1325 PRINTK3((CARDNAME": SMC interrupt started\n"));
1326
1327 saved_bank = inw( ioaddr + BANK_SELECT );
1328
1329 SMC_SELECT_BANK(2);
1330 saved_pointer = inw( ioaddr + POINTER );
1331
1332 mask = inb( ioaddr + INT_MASK );
1333 /* clear all interrupts */
1334 outb( 0, ioaddr + INT_MASK );
1335
1336
1337 /* set a timeout value, so I don't stay here forever */
1338 timeout = 4;
1339
1340 PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask));
1341 do {
1342 /* read the status flag, and mask it */
1343 status = inb( ioaddr + INTERRUPT ) & mask;
1344 if (!status )
1345 break;
1346
1347 handled = 1;
1348
1349 PRINTK3((KERN_WARNING CARDNAME
1350 ": Handling interrupt status %x\n", status));
1351
1352 if (status & IM_RCV_INT) {
1353 /* Got a packet(s). */
1354 PRINTK2((KERN_WARNING CARDNAME
1355 ": Receive Interrupt\n"));
1356 smc_rcv(dev);
1357 } else if (status & IM_TX_INT ) {
1358 PRINTK2((KERN_WARNING CARDNAME
1359 ": TX ERROR handled\n"));
1360 smc_tx(dev);
1361 outb(IM_TX_INT, ioaddr + INTERRUPT );
1362 } else if (status & IM_TX_EMPTY_INT ) {
1363 /* update stats */
1364 SMC_SELECT_BANK( 0 );
1365 card_stats = inw( ioaddr + COUNTER );
1366 /* single collisions */
1367 dev->stats.collisions += card_stats & 0xF;
1368 card_stats >>= 4;
1369 /* multiple collisions */
1370 dev->stats.collisions += card_stats & 0xF;
1371
1372 /* these are for when linux supports these statistics */
1373
1374 SMC_SELECT_BANK( 2 );
1375 PRINTK2((KERN_WARNING CARDNAME
1376 ": TX_BUFFER_EMPTY handled\n"));
1377 outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
1378 mask &= ~IM_TX_EMPTY_INT;
1379 dev->stats.tx_packets += lp->packets_waiting;
1380 lp->packets_waiting = 0;
1381
1382 } else if (status & IM_ALLOC_INT ) {
1383 PRINTK2((KERN_DEBUG CARDNAME
1384 ": Allocation interrupt\n"));
1385 /* clear this interrupt so it doesn't happen again */
1386 mask &= ~IM_ALLOC_INT;
1387
1388 smc_hardware_send_packet( dev );
1389
1390 /* enable xmit interrupts based on this */
1391 mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
1392
1393 /* and let the card send more packets to me */
1394 netif_wake_queue(dev);
1395
1396 PRINTK2((CARDNAME": Handoff done successfully.\n"));
1397 } else if (status & IM_RX_OVRN_INT ) {
1398 dev->stats.rx_errors++;
1399 dev->stats.rx_fifo_errors++;
1400 outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
1401 } else if (status & IM_EPH_INT ) {
1402 PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n"));
1403 } else if (status & IM_ERCV_INT ) {
1404 PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n"));
1405 outb( IM_ERCV_INT, ioaddr + INTERRUPT );
1406 }
1407 } while ( timeout -- );
1408
1409
1410 /* restore state register */
1411 SMC_SELECT_BANK( 2 );
1412 outb( mask, ioaddr + INT_MASK );
1413
1414 PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask));
1415 outw( saved_pointer, ioaddr + POINTER );
1416
1417 SMC_SELECT_BANK( saved_bank );
1418
1419 PRINTK3((CARDNAME ": Interrupt done\n"));
1420 return IRQ_RETVAL(handled);
1421 }
1422
1423
1424 /*----------------------------------------------------
1425 . smc_close
1426 .
1427 . this makes the board clean up everything that it can
1428 . and not talk to the outside world. Caused by
1429 . an 'ifconfig ethX down'
1430 .
1431 -----------------------------------------------------*/
smc_close(struct net_device * dev)1432 static int smc_close(struct net_device *dev)
1433 {
1434 netif_stop_queue(dev);
1435 /* clear everything */
1436 smc_shutdown( dev->base_addr );
1437
1438 /* Update the statistics here. */
1439 return 0;
1440 }
1441
1442 /*-----------------------------------------------------------
1443 . smc_set_multicast_list
1444 .
1445 . This routine will, depending on the values passed to it,
1446 . either make it accept multicast packets, go into
1447 . promiscuous mode ( for TCPDUMP and cousins ) or accept
1448 . a select set of multicast packets
1449 */
smc_set_multicast_list(struct net_device * dev)1450 static void smc_set_multicast_list(struct net_device *dev)
1451 {
1452 short ioaddr = dev->base_addr;
1453
1454 SMC_SELECT_BANK(0);
1455 if ( dev->flags & IFF_PROMISC )
1456 outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
1457
1458 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1459 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1460 when promiscuous mode is turned on.
1461 */
1462
1463 /* Here, I am setting this to accept all multicast packets.
1464 I don't need to zero the multicast table, because the flag is
1465 checked before the table is
1466 */
1467 else if (dev->flags & IFF_ALLMULTI)
1468 outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
1469
1470 /* We just get all multicast packets even if we only want them
1471 . from one source. This will be changed at some future
1472 . point. */
1473 else if (!netdev_mc_empty(dev)) {
1474 /* support hardware multicasting */
1475
1476 /* be sure I get rid of flags I might have set */
1477 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1478 ioaddr + RCR );
1479 /* NOTE: this has to set the bank, so make sure it is the
1480 last thing called. The bank is set to zero at the top */
1481 smc_setmulticast(ioaddr, dev);
1482 }
1483 else {
1484 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1485 ioaddr + RCR );
1486
1487 /*
1488 since I'm disabling all multicast entirely, I need to
1489 clear the multicast list
1490 */
1491 SMC_SELECT_BANK( 3 );
1492 outw( 0, ioaddr + MULTICAST1 );
1493 outw( 0, ioaddr + MULTICAST2 );
1494 outw( 0, ioaddr + MULTICAST3 );
1495 outw( 0, ioaddr + MULTICAST4 );
1496 }
1497 }
1498
1499 #ifdef MODULE
1500
1501 static struct net_device *devSMC9194;
1502 MODULE_LICENSE("GPL");
1503
1504 module_param_hw(io, int, ioport, 0);
1505 module_param_hw(irq, int, irq, 0);
1506 module_param(ifport, int, 0);
1507 MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
1508 MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
1509 MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
1510
init_module(void)1511 int __init init_module(void)
1512 {
1513 if (io == 0)
1514 printk(KERN_WARNING
1515 CARDNAME": You shouldn't use auto-probing with insmod!\n" );
1516
1517 /* copy the parameters from insmod into the device structure */
1518 devSMC9194 = smc_init(-1);
1519 return PTR_ERR_OR_ZERO(devSMC9194);
1520 }
1521
cleanup_module(void)1522 void __exit cleanup_module(void)
1523 {
1524 unregister_netdev(devSMC9194);
1525 free_irq(devSMC9194->irq, devSMC9194);
1526 release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
1527 free_netdev(devSMC9194);
1528 }
1529
1530 #endif /* MODULE */
1531
