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Merge tag 'regulator-v3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie...
[deliverable/linux.git] / drivers / net / ethernet / smsc / smc9194.c
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)\n";
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 */
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 */
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 */
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
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 */
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 */
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 printk(KERN_DEBUG 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 */
686 static int io;
687 static int irq;
688 static int ifport;
689
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 */
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_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 */
846 static int __init smc_probe(struct net_device *dev, int ioaddr)
847 {
848 int i, memory, retval;
849 static unsigned version_printed;
850 unsigned int bank;
851
852 const char *version_string;
853 const char *if_string;
854
855 /* registers */
856 word revision_register;
857 word base_address_register;
858 word configuration_register;
859 word memory_info_register;
860 word memory_cfg_register;
861
862 /* Grab the region so that no one else tries to probe our ioports. */
863 if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
864 return -EBUSY;
865
866 dev->irq = irq;
867 dev->if_port = ifport;
868
869 /* First, see if the high byte is 0x33 */
870 bank = inw( ioaddr + BANK_SELECT );
871 if ( (bank & 0xFF00) != 0x3300 ) {
872 retval = -ENODEV;
873 goto err_out;
874 }
875 /* The above MIGHT indicate a device, but I need to write to further
876 test this. */
877 outw( 0x0, ioaddr + BANK_SELECT );
878 bank = inw( ioaddr + BANK_SELECT );
879 if ( (bank & 0xFF00 ) != 0x3300 ) {
880 retval = -ENODEV;
881 goto err_out;
882 }
883 /* well, we've already written once, so hopefully another time won't
884 hurt. This time, I need to switch the bank register to bank 1,
885 so I can access the base address register */
886 SMC_SELECT_BANK(1);
887 base_address_register = inw( ioaddr + BASE );
888 if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) {
889 printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). "
890 "Probably not a SMC chip\n",
891 ioaddr, base_address_register >> 3 & 0x3E0 );
892 /* well, the base address register didn't match. Must not have
893 been a SMC chip after all. */
894 retval = -ENODEV;
895 goto err_out;
896 }
897
898 /* check if the revision register is something that I recognize.
899 These might need to be added to later, as future revisions
900 could be added. */
901 SMC_SELECT_BANK(3);
902 revision_register = inw( ioaddr + REVISION );
903 if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) {
904 /* I don't recognize this chip, so... */
905 printk(CARDNAME ": IO %x: Unrecognized revision register:"
906 " %x, Contact author.\n", ioaddr, revision_register);
907
908 retval = -ENODEV;
909 goto err_out;
910 }
911
912 /* at this point I'll assume that the chip is an SMC9xxx.
913 It might be prudent to check a listing of MAC addresses
914 against the hardware address, or do some other tests. */
915
916 if (version_printed++ == 0)
917 printk("%s", version);
918
919 /* fill in some of the fields */
920 dev->base_addr = ioaddr;
921
922 /*
923 . Get the MAC address ( bank 1, regs 4 - 9 )
924 */
925 SMC_SELECT_BANK( 1 );
926 for ( i = 0; i < 6; i += 2 ) {
927 word address;
928
929 address = inw( ioaddr + ADDR0 + i );
930 dev->dev_addr[ i + 1] = address >> 8;
931 dev->dev_addr[ i ] = address & 0xFF;
932 }
933
934 /* get the memory information */
935
936 SMC_SELECT_BANK( 0 );
937 memory_info_register = inw( ioaddr + MIR );
938 memory_cfg_register = inw( ioaddr + MCR );
939 memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */
940 memory *= 256 * ( memory_info_register & 0xFF );
941
942 /*
943 Now, I want to find out more about the chip. This is sort of
944 redundant, but it's cleaner to have it in both, rather than having
945 one VERY long probe procedure.
946 */
947 SMC_SELECT_BANK(3);
948 revision_register = inw( ioaddr + REVISION );
949 version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ];
950 if ( !version_string ) {
951 /* I shouldn't get here because this call was done before.... */
952 retval = -ENODEV;
953 goto err_out;
954 }
955
956 /* is it using AUI or 10BaseT ? */
957 if ( dev->if_port == 0 ) {
958 SMC_SELECT_BANK(1);
959 configuration_register = inw( ioaddr + CONFIG );
960 if ( configuration_register & CFG_AUI_SELECT )
961 dev->if_port = 2;
962 else
963 dev->if_port = 1;
964 }
965 if_string = interfaces[ dev->if_port - 1 ];
966
967 /* now, reset the chip, and put it into a known state */
968 smc_reset( ioaddr );
969
970 /*
971 . If dev->irq is 0, then the device has to be banged on to see
972 . what the IRQ is.
973 .
974 . This banging doesn't always detect the IRQ, for unknown reasons.
975 . a workaround is to reset the chip and try again.
976 .
977 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to
978 . be what is requested on the command line. I don't do that, mostly
979 . because the card that I have uses a non-standard method of accessing
980 . the IRQs, and because this _should_ work in most configurations.
981 .
982 . Specifying an IRQ is done with the assumption that the user knows
983 . what (s)he is doing. No checking is done!!!!
984 .
985 */
986 if ( dev->irq < 2 ) {
987 int trials;
988
989 trials = 3;
990 while ( trials-- ) {
991 dev->irq = smc_findirq( ioaddr );
992 if ( dev->irq )
993 break;
994 /* kick the card and try again */
995 smc_reset( ioaddr );
996 }
997 }
998 if (dev->irq == 0 ) {
999 printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
1000 retval = -ENODEV;
1001 goto err_out;
1002 }
1003
1004 /* now, print out the card info, in a short format.. */
1005
1006 printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name,
1007 version_string, revision_register & 0xF, ioaddr, dev->irq,
1008 if_string, memory );
1009 /*
1010 . Print the Ethernet address
1011 */
1012 printk("ADDR: %pM\n", dev->dev_addr);
1013
1014 /* Grab the IRQ */
1015 retval = request_irq(dev->irq, smc_interrupt, 0, DRV_NAME, dev);
1016 if (retval) {
1017 printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME,
1018 dev->irq, retval);
1019 goto err_out;
1020 }
1021
1022 dev->netdev_ops = &smc_netdev_ops;
1023 dev->watchdog_timeo = HZ/20;
1024
1025 return 0;
1026
1027 err_out:
1028 release_region(ioaddr, SMC_IO_EXTENT);
1029 return retval;
1030 }
1031
1032 #if SMC_DEBUG > 2
1033 static void print_packet( byte * buf, int length )
1034 {
1035 #if 0
1036 int i;
1037 int remainder;
1038 int lines;
1039
1040 printk("Packet of length %d\n", length);
1041 lines = length / 16;
1042 remainder = length % 16;
1043
1044 for ( i = 0; i < lines ; i ++ ) {
1045 int cur;
1046
1047 for ( cur = 0; cur < 8; cur ++ ) {
1048 byte a, b;
1049
1050 a = *(buf ++ );
1051 b = *(buf ++ );
1052 printk("%02x%02x ", a, b );
1053 }
1054 printk("\n");
1055 }
1056 for ( i = 0; i < remainder/2 ; i++ ) {
1057 byte a, b;
1058
1059 a = *(buf ++ );
1060 b = *(buf ++ );
1061 printk("%02x%02x ", a, b );
1062 }
1063 printk("\n");
1064 #endif
1065 }
1066 #endif
1067
1068
1069 /*
1070 * Open and Initialize the board
1071 *
1072 * Set up everything, reset the card, etc ..
1073 *
1074 */
1075 static int smc_open(struct net_device *dev)
1076 {
1077 int ioaddr = dev->base_addr;
1078
1079 int i; /* used to set hw ethernet address */
1080
1081 /* clear out all the junk that was put here before... */
1082 memset(netdev_priv(dev), 0, sizeof(struct smc_local));
1083
1084 /* reset the hardware */
1085
1086 smc_reset( ioaddr );
1087 smc_enable( ioaddr );
1088
1089 /* Select which interface to use */
1090
1091 SMC_SELECT_BANK( 1 );
1092 if ( dev->if_port == 1 ) {
1093 outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
1094 ioaddr + CONFIG );
1095 }
1096 else if ( dev->if_port == 2 ) {
1097 outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
1098 ioaddr + CONFIG );
1099 }
1100
1101 /*
1102 According to Becker, I have to set the hardware address
1103 at this point, because the (l)user can set it with an
1104 ioctl. Easily done...
1105 */
1106 SMC_SELECT_BANK( 1 );
1107 for ( i = 0; i < 6; i += 2 ) {
1108 word address;
1109
1110 address = dev->dev_addr[ i + 1 ] << 8 ;
1111 address |= dev->dev_addr[ i ];
1112 outw( address, ioaddr + ADDR0 + i );
1113 }
1114
1115 netif_start_queue(dev);
1116 return 0;
1117 }
1118
1119 /*--------------------------------------------------------
1120 . Called by the kernel to send a packet out into the void
1121 . of the net. This routine is largely based on
1122 . skeleton.c, from Becker.
1123 .--------------------------------------------------------
1124 */
1125
1126 static void smc_timeout(struct net_device *dev)
1127 {
1128 /* If we get here, some higher level has decided we are broken.
1129 There should really be a "kick me" function call instead. */
1130 printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n",
1131 tx_done(dev) ? "IRQ conflict" :
1132 "network cable problem");
1133 /* "kick" the adaptor */
1134 smc_reset( dev->base_addr );
1135 smc_enable( dev->base_addr );
1136 dev->trans_start = jiffies; /* prevent tx timeout */
1137 /* clear anything saved */
1138 ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL;
1139 netif_wake_queue(dev);
1140 }
1141
1142 /*-------------------------------------------------------------
1143 .
1144 . smc_rcv - receive a packet from the card
1145 .
1146 . There is ( at least ) a packet waiting to be read from
1147 . chip-memory.
1148 .
1149 . o Read the status
1150 . o If an error, record it
1151 . o otherwise, read in the packet
1152 --------------------------------------------------------------
1153 */
1154 static void smc_rcv(struct net_device *dev)
1155 {
1156 int ioaddr = dev->base_addr;
1157 int packet_number;
1158 word status;
1159 word packet_length;
1160
1161 /* assume bank 2 */
1162
1163 packet_number = inw( ioaddr + FIFO_PORTS );
1164
1165 if ( packet_number & FP_RXEMPTY ) {
1166 /* we got called , but nothing was on the FIFO */
1167 PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO.\n"));
1168 /* don't need to restore anything */
1169 return;
1170 }
1171
1172 /* start reading from the start of the packet */
1173 outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
1174
1175 /* First two words are status and packet_length */
1176 status = inw( ioaddr + DATA_1 );
1177 packet_length = inw( ioaddr + DATA_1 );
1178
1179 packet_length &= 0x07ff; /* mask off top bits */
1180
1181 PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
1182 /*
1183 . the packet length contains 3 extra words :
1184 . status, length, and an extra word with an odd byte .
1185 */
1186 packet_length -= 6;
1187
1188 if ( !(status & RS_ERRORS ) ){
1189 /* do stuff to make a new packet */
1190 struct sk_buff * skb;
1191 byte * data;
1192
1193 /* read one extra byte */
1194 if ( status & RS_ODDFRAME )
1195 packet_length++;
1196
1197 /* set multicast stats */
1198 if ( status & RS_MULTICAST )
1199 dev->stats.multicast++;
1200
1201 skb = netdev_alloc_skb(dev, packet_length + 5);
1202 if ( skb == NULL ) {
1203 dev->stats.rx_dropped++;
1204 goto done;
1205 }
1206
1207 /*
1208 ! This should work without alignment, but it could be
1209 ! in the worse case
1210 */
1211
1212 skb_reserve( skb, 2 ); /* 16 bit alignment */
1213
1214 data = skb_put( skb, packet_length);
1215
1216 #ifdef USE_32_BIT
1217 /* QUESTION: Like in the TX routine, do I want
1218 to send the DWORDs or the bytes first, or some
1219 mixture. A mixture might improve already slow PIO
1220 performance */
1221 PRINTK3((" Reading %d dwords (and %d bytes)\n",
1222 packet_length >> 2, packet_length & 3 ));
1223 insl(ioaddr + DATA_1 , data, packet_length >> 2 );
1224 /* read the left over bytes */
1225 insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
1226 packet_length & 0x3 );
1227 #else
1228 PRINTK3((" Reading %d words and %d byte(s)\n",
1229 (packet_length >> 1 ), packet_length & 1 ));
1230 insw(ioaddr + DATA_1 , data, packet_length >> 1);
1231 if ( packet_length & 1 ) {
1232 data += packet_length & ~1;
1233 *(data++) = inb( ioaddr + DATA_1 );
1234 }
1235 #endif
1236 #if SMC_DEBUG > 2
1237 print_packet( data, packet_length );
1238 #endif
1239
1240 skb->protocol = eth_type_trans(skb, dev );
1241 netif_rx(skb);
1242 dev->stats.rx_packets++;
1243 dev->stats.rx_bytes += packet_length;
1244 } else {
1245 /* error ... */
1246 dev->stats.rx_errors++;
1247
1248 if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++;
1249 if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
1250 dev->stats.rx_length_errors++;
1251 if ( status & RS_BADCRC) dev->stats.rx_crc_errors++;
1252 }
1253
1254 done:
1255 /* error or good, tell the card to get rid of this packet */
1256 outw( MC_RELEASE, ioaddr + MMU_CMD );
1257 }
1258
1259
1260 /*************************************************************************
1261 . smc_tx
1262 .
1263 . Purpose: Handle a transmit error message. This will only be called
1264 . when an error, because of the AUTO_RELEASE mode.
1265 .
1266 . Algorithm:
1267 . Save pointer and packet no
1268 . Get the packet no from the top of the queue
1269 . check if it's valid ( if not, is this an error??? )
1270 . read the status word
1271 . record the error
1272 . ( resend? Not really, since we don't want old packets around )
1273 . Restore saved values
1274 ************************************************************************/
1275 static void smc_tx( struct net_device * dev )
1276 {
1277 int ioaddr = dev->base_addr;
1278 struct smc_local *lp = netdev_priv(dev);
1279 byte saved_packet;
1280 byte packet_no;
1281 word tx_status;
1282
1283
1284 /* assume bank 2 */
1285
1286 saved_packet = inb( ioaddr + PNR_ARR );
1287 packet_no = inw( ioaddr + FIFO_PORTS );
1288 packet_no &= 0x7F;
1289
1290 /* select this as the packet to read from */
1291 outb( packet_no, ioaddr + PNR_ARR );
1292
1293 /* read the first word from this packet */
1294 outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
1295
1296 tx_status = inw( ioaddr + DATA_1 );
1297 PRINTK3((CARDNAME": TX DONE STATUS: %4x\n", tx_status));
1298
1299 dev->stats.tx_errors++;
1300 if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
1301 if ( tx_status & TS_LATCOL ) {
1302 printk(KERN_DEBUG CARDNAME
1303 ": Late collision occurred on last xmit.\n");
1304 dev->stats.tx_window_errors++;
1305 }
1306 #if 0
1307 if ( tx_status & TS_16COL ) { ... }
1308 #endif
1309
1310 if ( tx_status & TS_SUCCESS ) {
1311 printk(CARDNAME": Successful packet caused interrupt\n");
1312 }
1313 /* re-enable transmit */
1314 SMC_SELECT_BANK( 0 );
1315 outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
1316
1317 /* kill the packet */
1318 SMC_SELECT_BANK( 2 );
1319 outw( MC_FREEPKT, ioaddr + MMU_CMD );
1320
1321 /* one less packet waiting for me */
1322 lp->packets_waiting--;
1323
1324 outb( saved_packet, ioaddr + PNR_ARR );
1325 }
1326
1327 /*--------------------------------------------------------------------
1328 .
1329 . This is the main routine of the driver, to handle the device when
1330 . it needs some attention.
1331 .
1332 . So:
1333 . first, save state of the chipset
1334 . branch off into routines to handle each case, and acknowledge
1335 . each to the interrupt register
1336 . and finally restore state.
1337 .
1338 ---------------------------------------------------------------------*/
1339
1340 static irqreturn_t smc_interrupt(int irq, void * dev_id)
1341 {
1342 struct net_device *dev = dev_id;
1343 int ioaddr = dev->base_addr;
1344 struct smc_local *lp = netdev_priv(dev);
1345
1346 byte status;
1347 word card_stats;
1348 byte mask;
1349 int timeout;
1350 /* state registers */
1351 word saved_bank;
1352 word saved_pointer;
1353 int handled = 0;
1354
1355
1356 PRINTK3((CARDNAME": SMC interrupt started\n"));
1357
1358 saved_bank = inw( ioaddr + BANK_SELECT );
1359
1360 SMC_SELECT_BANK(2);
1361 saved_pointer = inw( ioaddr + POINTER );
1362
1363 mask = inb( ioaddr + INT_MASK );
1364 /* clear all interrupts */
1365 outb( 0, ioaddr + INT_MASK );
1366
1367
1368 /* set a timeout value, so I don't stay here forever */
1369 timeout = 4;
1370
1371 PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x\n", mask));
1372 do {
1373 /* read the status flag, and mask it */
1374 status = inb( ioaddr + INTERRUPT ) & mask;
1375 if (!status )
1376 break;
1377
1378 handled = 1;
1379
1380 PRINTK3((KERN_WARNING CARDNAME
1381 ": Handling interrupt status %x\n", status));
1382
1383 if (status & IM_RCV_INT) {
1384 /* Got a packet(s). */
1385 PRINTK2((KERN_WARNING CARDNAME
1386 ": Receive Interrupt\n"));
1387 smc_rcv(dev);
1388 } else if (status & IM_TX_INT ) {
1389 PRINTK2((KERN_WARNING CARDNAME
1390 ": TX ERROR handled\n"));
1391 smc_tx(dev);
1392 outb(IM_TX_INT, ioaddr + INTERRUPT );
1393 } else if (status & IM_TX_EMPTY_INT ) {
1394 /* update stats */
1395 SMC_SELECT_BANK( 0 );
1396 card_stats = inw( ioaddr + COUNTER );
1397 /* single collisions */
1398 dev->stats.collisions += card_stats & 0xF;
1399 card_stats >>= 4;
1400 /* multiple collisions */
1401 dev->stats.collisions += card_stats & 0xF;
1402
1403 /* these are for when linux supports these statistics */
1404
1405 SMC_SELECT_BANK( 2 );
1406 PRINTK2((KERN_WARNING CARDNAME
1407 ": TX_BUFFER_EMPTY handled\n"));
1408 outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
1409 mask &= ~IM_TX_EMPTY_INT;
1410 dev->stats.tx_packets += lp->packets_waiting;
1411 lp->packets_waiting = 0;
1412
1413 } else if (status & IM_ALLOC_INT ) {
1414 PRINTK2((KERN_DEBUG CARDNAME
1415 ": Allocation interrupt\n"));
1416 /* clear this interrupt so it doesn't happen again */
1417 mask &= ~IM_ALLOC_INT;
1418
1419 smc_hardware_send_packet( dev );
1420
1421 /* enable xmit interrupts based on this */
1422 mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
1423
1424 /* and let the card send more packets to me */
1425 netif_wake_queue(dev);
1426
1427 PRINTK2((CARDNAME": Handoff done successfully.\n"));
1428 } else if (status & IM_RX_OVRN_INT ) {
1429 dev->stats.rx_errors++;
1430 dev->stats.rx_fifo_errors++;
1431 outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
1432 } else if (status & IM_EPH_INT ) {
1433 PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT\n"));
1434 } else if (status & IM_ERCV_INT ) {
1435 PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT\n"));
1436 outb( IM_ERCV_INT, ioaddr + INTERRUPT );
1437 }
1438 } while ( timeout -- );
1439
1440
1441 /* restore state register */
1442 SMC_SELECT_BANK( 2 );
1443 outb( mask, ioaddr + INT_MASK );
1444
1445 PRINTK3((KERN_WARNING CARDNAME ": MASK is now %x\n", mask));
1446 outw( saved_pointer, ioaddr + POINTER );
1447
1448 SMC_SELECT_BANK( saved_bank );
1449
1450 PRINTK3((CARDNAME ": Interrupt done\n"));
1451 return IRQ_RETVAL(handled);
1452 }
1453
1454
1455 /*----------------------------------------------------
1456 . smc_close
1457 .
1458 . this makes the board clean up everything that it can
1459 . and not talk to the outside world. Caused by
1460 . an 'ifconfig ethX down'
1461 .
1462 -----------------------------------------------------*/
1463 static int smc_close(struct net_device *dev)
1464 {
1465 netif_stop_queue(dev);
1466 /* clear everything */
1467 smc_shutdown( dev->base_addr );
1468
1469 /* Update the statistics here. */
1470 return 0;
1471 }
1472
1473 /*-----------------------------------------------------------
1474 . smc_set_multicast_list
1475 .
1476 . This routine will, depending on the values passed to it,
1477 . either make it accept multicast packets, go into
1478 . promiscuous mode ( for TCPDUMP and cousins ) or accept
1479 . a select set of multicast packets
1480 */
1481 static void smc_set_multicast_list(struct net_device *dev)
1482 {
1483 short ioaddr = dev->base_addr;
1484
1485 SMC_SELECT_BANK(0);
1486 if ( dev->flags & IFF_PROMISC )
1487 outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
1488
1489 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1490 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1491 when promiscuous mode is turned on.
1492 */
1493
1494 /* Here, I am setting this to accept all multicast packets.
1495 I don't need to zero the multicast table, because the flag is
1496 checked before the table is
1497 */
1498 else if (dev->flags & IFF_ALLMULTI)
1499 outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
1500
1501 /* We just get all multicast packets even if we only want them
1502 . from one source. This will be changed at some future
1503 . point. */
1504 else if (!netdev_mc_empty(dev)) {
1505 /* support hardware multicasting */
1506
1507 /* be sure I get rid of flags I might have set */
1508 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1509 ioaddr + RCR );
1510 /* NOTE: this has to set the bank, so make sure it is the
1511 last thing called. The bank is set to zero at the top */
1512 smc_setmulticast(ioaddr, dev);
1513 }
1514 else {
1515 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1516 ioaddr + RCR );
1517
1518 /*
1519 since I'm disabling all multicast entirely, I need to
1520 clear the multicast list
1521 */
1522 SMC_SELECT_BANK( 3 );
1523 outw( 0, ioaddr + MULTICAST1 );
1524 outw( 0, ioaddr + MULTICAST2 );
1525 outw( 0, ioaddr + MULTICAST3 );
1526 outw( 0, ioaddr + MULTICAST4 );
1527 }
1528 }
1529
1530 #ifdef MODULE
1531
1532 static struct net_device *devSMC9194;
1533 MODULE_LICENSE("GPL");
1534
1535 module_param(io, int, 0);
1536 module_param(irq, int, 0);
1537 module_param(ifport, int, 0);
1538 MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
1539 MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
1540 MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
1541
1542 int __init init_module(void)
1543 {
1544 if (io == 0)
1545 printk(KERN_WARNING
1546 CARDNAME": You shouldn't use auto-probing with insmod!\n" );
1547
1548 /* copy the parameters from insmod into the device structure */
1549 devSMC9194 = smc_init(-1);
1550 if (IS_ERR(devSMC9194))
1551 return PTR_ERR(devSMC9194);
1552 return 0;
1553 }
1554
1555 void __exit cleanup_module(void)
1556 {
1557 unregister_netdev(devSMC9194);
1558 free_irq(devSMC9194->irq, devSMC9194);
1559 release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
1560 free_netdev(devSMC9194);
1561 }
1562
1563 #endif /* MODULE */
Linux kernel - Deliverables
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