projects / deliverable / linux.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6
[deliverable/linux.git] / drivers / net / 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/slab.h>
68 #include <linux/string.h>
69 #include <linux/init.h>
70 #include <linux/crc32.h>
71 #include <linux/errno.h>
72 #include <linux/netdevice.h>
73 #include <linux/etherdevice.h>
74 #include <linux/skbuff.h>
75 #include <linux/bitops.h>
76
77 #include <asm/io.h>
78
79 #include "smc9194.h"
80
81 #define DRV_NAME "smc9194"
82
83 /*------------------------------------------------------------------------
84 .
85 . Configuration options, for the experienced user to change.
86 .
87 -------------------------------------------------------------------------*/
88
89 /*
90 . Do you want to use 32 bit xfers? This should work on all chips, as
91 . the chipset is designed to accommodate them.
92 */
93 #ifdef __sh__
94 #undef USE_32_BIT
95 #else
96 #define USE_32_BIT 1
97 #endif
98
99 #if defined(__H8300H__) || defined(__H8300S__)
100 #define NO_AUTOPROBE
101 #undef insl
102 #undef outsl
103 #define insl(a,b,l) io_insl_noswap(a,b,l)
104 #define outsl(a,b,l) io_outsl_noswap(a,b,l)
105 #endif
106
107 /*
108 .the SMC9194 can be at any of the following port addresses. To change,
109 .for a slightly different card, you can add it to the array. Keep in
110 .mind that the array must end in zero.
111 */
112
113 struct devlist {
114 unsigned int port;
115 unsigned int irq;
116 };
117
118 #if defined(CONFIG_H8S_EDOSK2674)
119 static struct devlist smc_devlist[] __initdata = {
120 {.port = 0xf80000, .irq = 16},
121 {.port = 0, .irq = 0 },
122 };
123 #else
124 static struct devlist smc_devlist[] __initdata = {
125 {.port = 0x200, .irq = 0},
126 {.port = 0x220, .irq = 0},
127 {.port = 0x240, .irq = 0},
128 {.port = 0x260, .irq = 0},
129 {.port = 0x280, .irq = 0},
130 {.port = 0x2A0, .irq = 0},
131 {.port = 0x2C0, .irq = 0},
132 {.port = 0x2E0, .irq = 0},
133 {.port = 0x300, .irq = 0},
134 {.port = 0x320, .irq = 0},
135 {.port = 0x340, .irq = 0},
136 {.port = 0x360, .irq = 0},
137 {.port = 0x380, .irq = 0},
138 {.port = 0x3A0, .irq = 0},
139 {.port = 0x3C0, .irq = 0},
140 {.port = 0x3E0, .irq = 0},
141 {.port = 0, .irq = 0},
142 };
143 #endif
144 /*
145 . Wait time for memory to be free. This probably shouldn't be
146 . tuned that much, as waiting for this means nothing else happens
147 . in the system
148 */
149 #define MEMORY_WAIT_TIME 16
150
151 /*
152 . DEBUGGING LEVELS
153 .
154 . 0 for normal operation
155 . 1 for slightly more details
156 . >2 for various levels of increasingly useless information
157 . 2 for interrupt tracking, status flags
158 . 3 for packet dumps, etc.
159 */
160 #define SMC_DEBUG 0
161
162 #if (SMC_DEBUG > 2 )
163 #define PRINTK3(x) printk x
164 #else
165 #define PRINTK3(x)
166 #endif
167
168 #if SMC_DEBUG > 1
169 #define PRINTK2(x) printk x
170 #else
171 #define PRINTK2(x)
172 #endif
173
174 #ifdef SMC_DEBUG
175 #define PRINTK(x) printk x
176 #else
177 #define PRINTK(x)
178 #endif
179
180
181 /*------------------------------------------------------------------------
182 .
183 . The internal workings of the driver. If you are changing anything
184 . here with the SMC stuff, you should have the datasheet and known
185 . what you are doing.
186 .
187 -------------------------------------------------------------------------*/
188 #define CARDNAME "SMC9194"
189
190
191 /* store this information for the driver.. */
192 struct smc_local {
193 /*
194 If I have to wait until memory is available to send
195 a packet, I will store the skbuff here, until I get the
196 desired memory. Then, I'll send it out and free it.
197 */
198 struct sk_buff * saved_skb;
199
200 /*
201 . This keeps track of how many packets that I have
202 . sent out. When an TX_EMPTY interrupt comes, I know
203 . that all of these have been sent.
204 */
205 int packets_waiting;
206 };
207
208
209 /*-----------------------------------------------------------------
210 .
211 . The driver can be entered at any of the following entry points.
212 .
213 .------------------------------------------------------------------ */
214
215 /*
216 . This is called by register_netdev(). It is responsible for
217 . checking the portlist for the SMC9000 series chipset. If it finds
218 . one, then it will initialize the device, find the hardware information,
219 . and sets up the appropriate device parameters.
220 . NOTE: Interrupts are *OFF* when this procedure is called.
221 .
222 . NB:This shouldn't be static since it is referred to externally.
223 */
224 struct net_device *smc_init(int unit);
225
226 /*
227 . The kernel calls this function when someone wants to use the device,
228 . typically 'ifconfig ethX up'.
229 */
230 static int smc_open(struct net_device *dev);
231
232 /*
233 . Our watchdog timed out. Called by the networking layer
234 */
235 static void smc_timeout(struct net_device *dev);
236
237 /*
238 . This is called by the kernel in response to 'ifconfig ethX down'. It
239 . is responsible for cleaning up everything that the open routine
240 . does, and maybe putting the card into a powerdown state.
241 */
242 static int smc_close(struct net_device *dev);
243
244 /*
245 . Finally, a call to set promiscuous mode ( for TCPDUMP and related
246 . programs ) and multicast modes.
247 */
248 static void smc_set_multicast_list(struct net_device *dev);
249
250
251 /*---------------------------------------------------------------
252 .
253 . Interrupt level calls..
254 .
255 ----------------------------------------------------------------*/
256
257 /*
258 . Handles the actual interrupt
259 */
260 static irqreturn_t smc_interrupt(int irq, void *);
261 /*
262 . This is a separate procedure to handle the receipt of a packet, to
263 . leave the interrupt code looking slightly cleaner
264 */
265 static inline void smc_rcv( struct net_device *dev );
266 /*
267 . This handles a TX interrupt, which is only called when an error
268 . relating to a packet is sent.
269 */
270 static inline void smc_tx( struct net_device * dev );
271
272 /*
273 ------------------------------------------------------------
274 .
275 . Internal routines
276 .
277 ------------------------------------------------------------
278 */
279
280 /*
281 . Test if a given location contains a chip, trying to cause as
282 . little damage as possible if it's not a SMC chip.
283 */
284 static int smc_probe(struct net_device *dev, int ioaddr);
285
286 /*
287 . A rather simple routine to print out a packet for debugging purposes.
288 */
289 #if SMC_DEBUG > 2
290 static void print_packet( byte *, int );
291 #endif
292
293 #define tx_done(dev) 1
294
295 /* this is called to actually send the packet to the chip */
296 static void smc_hardware_send_packet( struct net_device * dev );
297
298 /* Since I am not sure if I will have enough room in the chip's ram
299 . to store the packet, I call this routine, which either sends it
300 . now, or generates an interrupt when the card is ready for the
301 . packet */
302 static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device *dev );
303
304 /* this does a soft reset on the device */
305 static void smc_reset( int ioaddr );
306
307 /* Enable Interrupts, Receive, and Transmit */
308 static void smc_enable( int ioaddr );
309
310 /* this puts the device in an inactive state */
311 static void smc_shutdown( int ioaddr );
312
313 /* This routine will find the IRQ of the driver if one is not
314 . specified in the input to the device. */
315 static int smc_findirq( int ioaddr );
316
317 /*
318 . Function: smc_reset( int ioaddr )
319 . Purpose:
320 . This sets the SMC91xx chip to its normal state, hopefully from whatever
321 . mess that any other DOS driver has put it in.
322 .
323 . Maybe I should reset more registers to defaults in here? SOFTRESET should
324 . do that for me.
325 .
326 . Method:
327 . 1. send a SOFT RESET
328 . 2. wait for it to finish
329 . 3. enable autorelease mode
330 . 4. reset the memory management unit
331 . 5. clear all interrupts
332 .
333 */
334 static void smc_reset( int ioaddr )
335 {
336 /* This resets the registers mostly to defaults, but doesn't
337 affect EEPROM. That seems unnecessary */
338 SMC_SELECT_BANK( 0 );
339 outw( RCR_SOFTRESET, ioaddr + RCR );
340
341 /* this should pause enough for the chip to be happy */
342 SMC_DELAY( );
343
344 /* Set the transmit and receive configuration registers to
345 default values */
346 outw( RCR_CLEAR, ioaddr + RCR );
347 outw( TCR_CLEAR, ioaddr + TCR );
348
349 /* set the control register to automatically
350 release successfully transmitted packets, to make the best
351 use out of our limited memory */
352 SMC_SELECT_BANK( 1 );
353 outw( inw( ioaddr + CONTROL ) | CTL_AUTO_RELEASE , ioaddr + CONTROL );
354
355 /* Reset the MMU */
356 SMC_SELECT_BANK( 2 );
357 outw( MC_RESET, ioaddr + MMU_CMD );
358
359 /* Note: It doesn't seem that waiting for the MMU busy is needed here,
360 but this is a place where future chipsets _COULD_ break. Be wary
361 of issuing another MMU command right after this */
362
363 outb( 0, ioaddr + INT_MASK );
364 }
365
366 /*
367 . Function: smc_enable
368 . Purpose: let the chip talk to the outside work
369 . Method:
370 . 1. Enable the transmitter
371 . 2. Enable the receiver
372 . 3. Enable interrupts
373 */
374 static void smc_enable( int ioaddr )
375 {
376 SMC_SELECT_BANK( 0 );
377 /* see the header file for options in TCR/RCR NORMAL*/
378 outw( TCR_NORMAL, ioaddr + TCR );
379 outw( RCR_NORMAL, ioaddr + RCR );
380
381 /* now, enable interrupts */
382 SMC_SELECT_BANK( 2 );
383 outb( SMC_INTERRUPT_MASK, ioaddr + INT_MASK );
384 }
385
386 /*
387 . Function: smc_shutdown
388 . Purpose: closes down the SMC91xxx chip.
389 . Method:
390 . 1. zero the interrupt mask
391 . 2. clear the enable receive flag
392 . 3. clear the enable xmit flags
393 .
394 . TODO:
395 . (1) maybe utilize power down mode.
396 . Why not yet? Because while the chip will go into power down mode,
397 . the manual says that it will wake up in response to any I/O requests
398 . in the register space. Empirical results do not show this working.
399 */
400 static void smc_shutdown( int ioaddr )
401 {
402 /* no more interrupts for me */
403 SMC_SELECT_BANK( 2 );
404 outb( 0, ioaddr + INT_MASK );
405
406 /* and tell the card to stay away from that nasty outside world */
407 SMC_SELECT_BANK( 0 );
408 outb( RCR_CLEAR, ioaddr + RCR );
409 outb( TCR_CLEAR, ioaddr + TCR );
410 #if 0
411 /* finally, shut the chip down */
412 SMC_SELECT_BANK( 1 );
413 outw( inw( ioaddr + CONTROL ), CTL_POWERDOWN, ioaddr + CONTROL );
414 #endif
415 }
416
417
418 /*
419 . Function: smc_setmulticast( int ioaddr, int count, dev_mc_list * adds )
420 . Purpose:
421 . This sets the internal hardware table to filter out unwanted multicast
422 . packets before they take up memory.
423 .
424 . The SMC chip uses a hash table where the high 6 bits of the CRC of
425 . address are the offset into the table. If that bit is 1, then the
426 . multicast packet is accepted. Otherwise, it's dropped silently.
427 .
428 . To use the 6 bits as an offset into the table, the high 3 bits are the
429 . number of the 8 bit register, while the low 3 bits are the bit within
430 . that register.
431 .
432 . This routine is based very heavily on the one provided by Peter Cammaert.
433 */
434
435
436 static void smc_setmulticast( int ioaddr, int count, struct dev_mc_list * addrs ) {
437 int i;
438 unsigned char multicast_table[ 8 ];
439 struct dev_mc_list * cur_addr;
440 /* table for flipping the order of 3 bits */
441 unsigned char invert3[] = { 0, 4, 2, 6, 1, 5, 3, 7 };
442
443 /* start with a table of all zeros: reject all */
444 memset( multicast_table, 0, sizeof( multicast_table ) );
445
446 cur_addr = addrs;
447 for ( i = 0; i < count ; i ++, cur_addr = cur_addr->next ) {
448 int position;
449
450 /* do we have a pointer here? */
451 if ( !cur_addr )
452 break;
453 /* make sure this is a multicast address - shouldn't this
454 be a given if we have it here ? */
455 if ( !( *cur_addr->dmi_addr & 1 ) )
456 continue;
457
458 /* only use the low order bits */
459 position = ether_crc_le(6, cur_addr->dmi_addr) & 0x3f;
460
461 /* do some messy swapping to put the bit in the right spot */
462 multicast_table[invert3[position&7]] |=
463 (1<<invert3[(position>>3)&7]);
464
465 }
466 /* now, the table can be loaded into the chipset */
467 SMC_SELECT_BANK( 3 );
468
469 for ( i = 0; i < 8 ; i++ ) {
470 outb( multicast_table[i], ioaddr + MULTICAST1 + i );
471 }
472 }
473
474 /*
475 . Function: smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * )
476 . Purpose:
477 . Attempt to allocate memory for a packet, if chip-memory is not
478 . available, then tell the card to generate an interrupt when it
479 . is available.
480 .
481 . Algorithm:
482 .
483 . o if the saved_skb is not currently null, then drop this packet
484 . on the floor. This should never happen, because of TBUSY.
485 . o if the saved_skb is null, then replace it with the current packet,
486 . o See if I can sending it now.
487 . o (NO): Enable interrupts and let the interrupt handler deal with it.
488 . o (YES):Send it now.
489 */
490 static int smc_wait_to_send_packet( struct sk_buff * skb, struct net_device * dev )
491 {
492 struct smc_local *lp = netdev_priv(dev);
493 unsigned int ioaddr = dev->base_addr;
494 word length;
495 unsigned short numPages;
496 word time_out;
497
498 netif_stop_queue(dev);
499 /* Well, I want to send the packet.. but I don't know
500 if I can send it right now... */
501
502 if ( lp->saved_skb) {
503 /* THIS SHOULD NEVER HAPPEN. */
504 dev->stats.tx_aborted_errors++;
505 printk(CARDNAME": Bad Craziness - sent packet while busy.\n" );
506 return 1;
507 }
508 lp->saved_skb = skb;
509
510 length = skb->len;
511
512 if (length < ETH_ZLEN) {
513 if (skb_padto(skb, ETH_ZLEN)) {
514 netif_wake_queue(dev);
515 return 0;
516 }
517 length = ETH_ZLEN;
518 }
519
520 /*
521 ** The MMU wants the number of pages to be the number of 256 bytes
522 ** 'pages', minus 1 ( since a packet can't ever have 0 pages :) )
523 **
524 ** Pkt size for allocating is data length +6 (for additional status words,
525 ** length and ctl!) If odd size last byte is included in this header.
526 */
527 numPages = ((length & 0xfffe) + 6) / 256;
528
529 if (numPages > 7 ) {
530 printk(CARDNAME": Far too big packet error. \n");
531 /* freeing the packet is a good thing here... but should
532 . any packets of this size get down here? */
533 dev_kfree_skb (skb);
534 lp->saved_skb = NULL;
535 /* this IS an error, but, i don't want the skb saved */
536 netif_wake_queue(dev);
537 return 0;
538 }
539 /* either way, a packet is waiting now */
540 lp->packets_waiting++;
541
542 /* now, try to allocate the memory */
543 SMC_SELECT_BANK( 2 );
544 outw( MC_ALLOC | numPages, ioaddr + MMU_CMD );
545 /*
546 . Performance Hack
547 .
548 . wait a short amount of time.. if I can send a packet now, I send
549 . it now. Otherwise, I enable an interrupt and wait for one to be
550 . available.
551 .
552 . I could have handled this a slightly different way, by checking to
553 . see if any memory was available in the FREE MEMORY register. However,
554 . either way, I need to generate an allocation, and the allocation works
555 . no matter what, so I saw no point in checking free memory.
556 */
557 time_out = MEMORY_WAIT_TIME;
558 do {
559 word status;
560
561 status = inb( ioaddr + INTERRUPT );
562 if ( status & IM_ALLOC_INT ) {
563 /* acknowledge the interrupt */
564 outb( IM_ALLOC_INT, ioaddr + INTERRUPT );
565 break;
566 }
567 } while ( -- time_out );
568
569 if ( !time_out ) {
570 /* oh well, wait until the chip finds memory later */
571 SMC_ENABLE_INT( IM_ALLOC_INT );
572 PRINTK2((CARDNAME": memory allocation deferred. \n"));
573 /* it's deferred, but I'll handle it later */
574 return 0;
575 }
576 /* or YES! I can send the packet now.. */
577 smc_hardware_send_packet(dev);
578 netif_wake_queue(dev);
579 return 0;
580 }
581
582 /*
583 . Function: smc_hardware_send_packet(struct net_device * )
584 . Purpose:
585 . This sends the actual packet to the SMC9xxx chip.
586 .
587 . Algorithm:
588 . First, see if a saved_skb is available.
589 . ( this should NOT be called if there is no 'saved_skb'
590 . Now, find the packet number that the chip allocated
591 . Point the data pointers at it in memory
592 . Set the length word in the chip's memory
593 . Dump the packet to chip memory
594 . Check if a last byte is needed ( odd length packet )
595 . if so, set the control flag right
596 . Tell the card to send it
597 . Enable the transmit interrupt, so I know if it failed
598 . Free the kernel data if I actually sent it.
599 */
600 static void smc_hardware_send_packet( struct net_device * dev )
601 {
602 struct smc_local *lp = netdev_priv(dev);
603 byte packet_no;
604 struct sk_buff * skb = lp->saved_skb;
605 word length;
606 unsigned int ioaddr;
607 byte * buf;
608
609 ioaddr = dev->base_addr;
610
611 if ( !skb ) {
612 PRINTK((CARDNAME": In XMIT with no packet to send \n"));
613 return;
614 }
615 length = ETH_ZLEN < skb->len ? skb->len : ETH_ZLEN;
616 buf = skb->data;
617
618 /* If I get here, I _know_ there is a packet slot waiting for me */
619 packet_no = inb( ioaddr + PNR_ARR + 1 );
620 if ( packet_no & 0x80 ) {
621 /* or isn't there? BAD CHIP! */
622 printk(KERN_DEBUG CARDNAME": Memory allocation failed. \n");
623 dev_kfree_skb_any(skb);
624 lp->saved_skb = NULL;
625 netif_wake_queue(dev);
626 return;
627 }
628
629 /* we have a packet address, so tell the card to use it */
630 outb( packet_no, ioaddr + PNR_ARR );
631
632 /* point to the beginning of the packet */
633 outw( PTR_AUTOINC , ioaddr + POINTER );
634
635 PRINTK3((CARDNAME": Trying to xmit packet of length %x\n", length ));
636 #if SMC_DEBUG > 2
637 print_packet( buf, length );
638 #endif
639
640 /* send the packet length ( +6 for status, length and ctl byte )
641 and the status word ( set to zeros ) */
642 #ifdef USE_32_BIT
643 outl( (length +6 ) << 16 , ioaddr + DATA_1 );
644 #else
645 outw( 0, ioaddr + DATA_1 );
646 /* send the packet length ( +6 for status words, length, and ctl*/
647 outb( (length+6) & 0xFF,ioaddr + DATA_1 );
648 outb( (length+6) >> 8 , ioaddr + DATA_1 );
649 #endif
650
651 /* send the actual data
652 . I _think_ it's faster to send the longs first, and then
653 . mop up by sending the last word. It depends heavily
654 . on alignment, at least on the 486. Maybe it would be
655 . a good idea to check which is optimal? But that could take
656 . almost as much time as is saved?
657 */
658 #ifdef USE_32_BIT
659 if ( length & 0x2 ) {
660 outsl(ioaddr + DATA_1, buf, length >> 2 );
661 #if !defined(__H8300H__) && !defined(__H8300S__)
662 outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
663 #else
664 ctrl_outw( *((word *)(buf + (length & 0xFFFFFFFC))),ioaddr +DATA_1);
665 #endif
666 }
667 else
668 outsl(ioaddr + DATA_1, buf, length >> 2 );
669 #else
670 outsw(ioaddr + DATA_1 , buf, (length ) >> 1);
671 #endif
672 /* Send the last byte, if there is one. */
673
674 if ( (length & 1) == 0 ) {
675 outw( 0, ioaddr + DATA_1 );
676 } else {
677 outb( buf[length -1 ], ioaddr + DATA_1 );
678 outb( 0x20, ioaddr + DATA_1);
679 }
680
681 /* enable the interrupts */
682 SMC_ENABLE_INT( (IM_TX_INT | IM_TX_EMPTY_INT) );
683
684 /* and let the chipset deal with it */
685 outw( MC_ENQUEUE , ioaddr + MMU_CMD );
686
687 PRINTK2((CARDNAME": Sent packet of length %d \n",length));
688
689 lp->saved_skb = NULL;
690 dev_kfree_skb_any (skb);
691
692 dev->trans_start = jiffies;
693
694 /* we can send another packet */
695 netif_wake_queue(dev);
696
697 return;
698 }
699
700 /*-------------------------------------------------------------------------
701 |
702 | smc_init(int unit)
703 | Input parameters:
704 | dev->base_addr == 0, try to find all possible locations
705 | dev->base_addr == 1, return failure code
706 | dev->base_addr == 2, always allocate space, and return success
707 | dev->base_addr == <anything else> this is the address to check
708 |
709 | Output:
710 | pointer to net_device or ERR_PTR(error)
711 |
712 ---------------------------------------------------------------------------
713 */
714 static int io;
715 static int irq;
716 static int ifport;
717
718 struct net_device * __init smc_init(int unit)
719 {
720 struct net_device *dev = alloc_etherdev(sizeof(struct smc_local));
721 struct devlist *smcdev = smc_devlist;
722 int err = 0;
723
724 if (!dev)
725 return ERR_PTR(-ENODEV);
726
727 if (unit >= 0) {
728 sprintf(dev->name, "eth%d", unit);
729 netdev_boot_setup_check(dev);
730 io = dev->base_addr;
731 irq = dev->irq;
732 }
733
734 if (io > 0x1ff) { /* Check a single specified location. */
735 err = smc_probe(dev, io);
736 } else if (io != 0) { /* Don't probe at all. */
737 err = -ENXIO;
738 } else {
739 for (;smcdev->port; smcdev++) {
740 if (smc_probe(dev, smcdev->port) == 0)
741 break;
742 }
743 if (!smcdev->port)
744 err = -ENODEV;
745 }
746 if (err)
747 goto out;
748 err = register_netdev(dev);
749 if (err)
750 goto out1;
751 return dev;
752 out1:
753 free_irq(dev->irq, dev);
754 release_region(dev->base_addr, SMC_IO_EXTENT);
755 out:
756 free_netdev(dev);
757 return ERR_PTR(err);
758 }
759
760 /*----------------------------------------------------------------------
761 . smc_findirq
762 .
763 . This routine has a simple purpose -- make the SMC chip generate an
764 . interrupt, so an auto-detect routine can detect it, and find the IRQ,
765 ------------------------------------------------------------------------
766 */
767 static int __init smc_findirq(int ioaddr)
768 {
769 #ifndef NO_AUTOPROBE
770 int timeout = 20;
771 unsigned long cookie;
772
773
774 cookie = probe_irq_on();
775
776 /*
777 * What I try to do here is trigger an ALLOC_INT. This is done
778 * by allocating a small chunk of memory, which will give an interrupt
779 * when done.
780 */
781
782
783 SMC_SELECT_BANK(2);
784 /* enable ALLOCation interrupts ONLY */
785 outb( IM_ALLOC_INT, ioaddr + INT_MASK );
786
787 /*
788 . Allocate 512 bytes of memory. Note that the chip was just
789 . reset so all the memory is available
790 */
791 outw( MC_ALLOC | 1, ioaddr + MMU_CMD );
792
793 /*
794 . Wait until positive that the interrupt has been generated
795 */
796 while ( timeout ) {
797 byte int_status;
798
799 int_status = inb( ioaddr + INTERRUPT );
800
801 if ( int_status & IM_ALLOC_INT )
802 break; /* got the interrupt */
803 timeout--;
804 }
805 /* there is really nothing that I can do here if timeout fails,
806 as probe_irq_off will return a 0 anyway, which is what I
807 want in this case. Plus, the clean up is needed in both
808 cases. */
809
810 /* DELAY HERE!
811 On a fast machine, the status might change before the interrupt
812 is given to the processor. This means that the interrupt was
813 never detected, and probe_irq_off fails to report anything.
814 This should fix probe_irq_* problems.
815 */
816 SMC_DELAY();
817 SMC_DELAY();
818
819 /* and disable all interrupts again */
820 outb( 0, ioaddr + INT_MASK );
821
822 /* and return what I found */
823 return probe_irq_off(cookie);
824 #else /* NO_AUTOPROBE */
825 struct devlist *smcdev;
826 for (smcdev = smc_devlist; smcdev->port; smcdev++) {
827 if (smcdev->port == ioaddr)
828 return smcdev->irq;
829 }
830 return 0;
831 #endif
832 }
833
834 /*----------------------------------------------------------------------
835 . Function: smc_probe( int ioaddr )
836 .
837 . Purpose:
838 . Tests to see if a given ioaddr points to an SMC9xxx chip.
839 . Returns a 0 on success
840 .
841 . Algorithm:
842 . (1) see if the high byte of BANK_SELECT is 0x33
843 . (2) compare the ioaddr with the base register's address
844 . (3) see if I recognize the chip ID in the appropriate register
845 .
846 .---------------------------------------------------------------------
847 */
848
849 /*---------------------------------------------------------------
850 . Here I do typical initialization tasks.
851 .
852 . o Initialize the structure if needed
853 . o print out my vanity message if not done so already
854 . o print out what type of hardware is detected
855 . o print out the ethernet address
856 . o find the IRQ
857 . o set up my private data
858 . o configure the dev structure with my subroutines
859 . o actually GRAB the irq.
860 . o GRAB the region
861 .-----------------------------------------------------------------
862 */
863 static int __init smc_probe(struct net_device *dev, int ioaddr)
864 {
865 int i, memory, retval;
866 static unsigned version_printed;
867 unsigned int bank;
868
869 const char *version_string;
870 const char *if_string;
871
872 /* registers */
873 word revision_register;
874 word base_address_register;
875 word configuration_register;
876 word memory_info_register;
877 word memory_cfg_register;
878
879 /* Grab the region so that no one else tries to probe our ioports. */
880 if (!request_region(ioaddr, SMC_IO_EXTENT, DRV_NAME))
881 return -EBUSY;
882
883 dev->irq = irq;
884 dev->if_port = ifport;
885
886 /* First, see if the high byte is 0x33 */
887 bank = inw( ioaddr + BANK_SELECT );
888 if ( (bank & 0xFF00) != 0x3300 ) {
889 retval = -ENODEV;
890 goto err_out;
891 }
892 /* The above MIGHT indicate a device, but I need to write to further
893 test this. */
894 outw( 0x0, ioaddr + BANK_SELECT );
895 bank = inw( ioaddr + BANK_SELECT );
896 if ( (bank & 0xFF00 ) != 0x3300 ) {
897 retval = -ENODEV;
898 goto err_out;
899 }
900 #if !defined(CONFIG_H8S_EDOSK2674)
901 /* well, we've already written once, so hopefully another time won't
902 hurt. This time, I need to switch the bank register to bank 1,
903 so I can access the base address register */
904 SMC_SELECT_BANK(1);
905 base_address_register = inw( ioaddr + BASE );
906 if ( ioaddr != ( base_address_register >> 3 & 0x3E0 ) ) {
907 printk(CARDNAME ": IOADDR %x doesn't match configuration (%x). "
908 "Probably not a SMC chip\n",
909 ioaddr, base_address_register >> 3 & 0x3E0 );
910 /* well, the base address register didn't match. Must not have
911 been a SMC chip after all. */
912 retval = -ENODEV;
913 goto err_out;
914 }
915 #else
916 (void)base_address_register; /* Warning suppression */
917 #endif
918
919
920 /* check if the revision register is something that I recognize.
921 These might need to be added to later, as future revisions
922 could be added. */
923 SMC_SELECT_BANK(3);
924 revision_register = inw( ioaddr + REVISION );
925 if ( !chip_ids[ ( revision_register >> 4 ) & 0xF ] ) {
926 /* I don't recognize this chip, so... */
927 printk(CARDNAME ": IO %x: Unrecognized revision register:"
928 " %x, Contact author. \n", ioaddr, revision_register );
929
930 retval = -ENODEV;
931 goto err_out;
932 }
933
934 /* at this point I'll assume that the chip is an SMC9xxx.
935 It might be prudent to check a listing of MAC addresses
936 against the hardware address, or do some other tests. */
937
938 if (version_printed++ == 0)
939 printk("%s", version);
940
941 /* fill in some of the fields */
942 dev->base_addr = ioaddr;
943
944 /*
945 . Get the MAC address ( bank 1, regs 4 - 9 )
946 */
947 SMC_SELECT_BANK( 1 );
948 for ( i = 0; i < 6; i += 2 ) {
949 word address;
950
951 address = inw( ioaddr + ADDR0 + i );
952 dev->dev_addr[ i + 1] = address >> 8;
953 dev->dev_addr[ i ] = address & 0xFF;
954 }
955
956 /* get the memory information */
957
958 SMC_SELECT_BANK( 0 );
959 memory_info_register = inw( ioaddr + MIR );
960 memory_cfg_register = inw( ioaddr + MCR );
961 memory = ( memory_cfg_register >> 9 ) & 0x7; /* multiplier */
962 memory *= 256 * ( memory_info_register & 0xFF );
963
964 /*
965 Now, I want to find out more about the chip. This is sort of
966 redundant, but it's cleaner to have it in both, rather than having
967 one VERY long probe procedure.
968 */
969 SMC_SELECT_BANK(3);
970 revision_register = inw( ioaddr + REVISION );
971 version_string = chip_ids[ ( revision_register >> 4 ) & 0xF ];
972 if ( !version_string ) {
973 /* I shouldn't get here because this call was done before.... */
974 retval = -ENODEV;
975 goto err_out;
976 }
977
978 /* is it using AUI or 10BaseT ? */
979 if ( dev->if_port == 0 ) {
980 SMC_SELECT_BANK(1);
981 configuration_register = inw( ioaddr + CONFIG );
982 if ( configuration_register & CFG_AUI_SELECT )
983 dev->if_port = 2;
984 else
985 dev->if_port = 1;
986 }
987 if_string = interfaces[ dev->if_port - 1 ];
988
989 /* now, reset the chip, and put it into a known state */
990 smc_reset( ioaddr );
991
992 /*
993 . If dev->irq is 0, then the device has to be banged on to see
994 . what the IRQ is.
995 .
996 . This banging doesn't always detect the IRQ, for unknown reasons.
997 . a workaround is to reset the chip and try again.
998 .
999 . Interestingly, the DOS packet driver *SETS* the IRQ on the card to
1000 . be what is requested on the command line. I don't do that, mostly
1001 . because the card that I have uses a non-standard method of accessing
1002 . the IRQs, and because this _should_ work in most configurations.
1003 .
1004 . Specifying an IRQ is done with the assumption that the user knows
1005 . what (s)he is doing. No checking is done!!!!
1006 .
1007 */
1008 if ( dev->irq < 2 ) {
1009 int trials;
1010
1011 trials = 3;
1012 while ( trials-- ) {
1013 dev->irq = smc_findirq( ioaddr );
1014 if ( dev->irq )
1015 break;
1016 /* kick the card and try again */
1017 smc_reset( ioaddr );
1018 }
1019 }
1020 if (dev->irq == 0 ) {
1021 printk(CARDNAME": Couldn't autodetect your IRQ. Use irq=xx.\n");
1022 retval = -ENODEV;
1023 goto err_out;
1024 }
1025
1026 /* now, print out the card info, in a short format.. */
1027
1028 printk("%s: %s(r:%d) at %#3x IRQ:%d INTF:%s MEM:%db ", dev->name,
1029 version_string, revision_register & 0xF, ioaddr, dev->irq,
1030 if_string, memory );
1031 /*
1032 . Print the Ethernet address
1033 */
1034 printk("ADDR: %pM\n", dev->dev_addr);
1035
1036 /* set the private data to zero by default */
1037 memset(netdev_priv(dev), 0, sizeof(struct smc_local));
1038
1039 /* Grab the IRQ */
1040 retval = request_irq(dev->irq, &smc_interrupt, 0, DRV_NAME, dev);
1041 if (retval) {
1042 printk("%s: unable to get IRQ %d (irqval=%d).\n", DRV_NAME,
1043 dev->irq, retval);
1044 goto err_out;
1045 }
1046
1047 dev->open = smc_open;
1048 dev->stop = smc_close;
1049 dev->hard_start_xmit = smc_wait_to_send_packet;
1050 dev->tx_timeout = smc_timeout;
1051 dev->watchdog_timeo = HZ/20;
1052 dev->set_multicast_list = smc_set_multicast_list;
1053
1054 return 0;
1055
1056 err_out:
1057 release_region(ioaddr, SMC_IO_EXTENT);
1058 return retval;
1059 }
1060
1061 #if SMC_DEBUG > 2
1062 static void print_packet( byte * buf, int length )
1063 {
1064 #if 0
1065 int i;
1066 int remainder;
1067 int lines;
1068
1069 printk("Packet of length %d \n", length );
1070 lines = length / 16;
1071 remainder = length % 16;
1072
1073 for ( i = 0; i < lines ; i ++ ) {
1074 int cur;
1075
1076 for ( cur = 0; cur < 8; cur ++ ) {
1077 byte a, b;
1078
1079 a = *(buf ++ );
1080 b = *(buf ++ );
1081 printk("%02x%02x ", a, b );
1082 }
1083 printk("\n");
1084 }
1085 for ( i = 0; i < remainder/2 ; i++ ) {
1086 byte a, b;
1087
1088 a = *(buf ++ );
1089 b = *(buf ++ );
1090 printk("%02x%02x ", a, b );
1091 }
1092 printk("\n");
1093 #endif
1094 }
1095 #endif
1096
1097
1098 /*
1099 * Open and Initialize the board
1100 *
1101 * Set up everything, reset the card, etc ..
1102 *
1103 */
1104 static int smc_open(struct net_device *dev)
1105 {
1106 int ioaddr = dev->base_addr;
1107
1108 int i; /* used to set hw ethernet address */
1109
1110 /* clear out all the junk that was put here before... */
1111 memset(netdev_priv(dev), 0, sizeof(struct smc_local));
1112
1113 /* reset the hardware */
1114
1115 smc_reset( ioaddr );
1116 smc_enable( ioaddr );
1117
1118 /* Select which interface to use */
1119
1120 SMC_SELECT_BANK( 1 );
1121 if ( dev->if_port == 1 ) {
1122 outw( inw( ioaddr + CONFIG ) & ~CFG_AUI_SELECT,
1123 ioaddr + CONFIG );
1124 }
1125 else if ( dev->if_port == 2 ) {
1126 outw( inw( ioaddr + CONFIG ) | CFG_AUI_SELECT,
1127 ioaddr + CONFIG );
1128 }
1129
1130 /*
1131 According to Becker, I have to set the hardware address
1132 at this point, because the (l)user can set it with an
1133 ioctl. Easily done...
1134 */
1135 SMC_SELECT_BANK( 1 );
1136 for ( i = 0; i < 6; i += 2 ) {
1137 word address;
1138
1139 address = dev->dev_addr[ i + 1 ] << 8 ;
1140 address |= dev->dev_addr[ i ];
1141 outw( address, ioaddr + ADDR0 + i );
1142 }
1143
1144 netif_start_queue(dev);
1145 return 0;
1146 }
1147
1148 /*--------------------------------------------------------
1149 . Called by the kernel to send a packet out into the void
1150 . of the net. This routine is largely based on
1151 . skeleton.c, from Becker.
1152 .--------------------------------------------------------
1153 */
1154
1155 static void smc_timeout(struct net_device *dev)
1156 {
1157 /* If we get here, some higher level has decided we are broken.
1158 There should really be a "kick me" function call instead. */
1159 printk(KERN_WARNING CARDNAME": transmit timed out, %s?\n",
1160 tx_done(dev) ? "IRQ conflict" :
1161 "network cable problem");
1162 /* "kick" the adaptor */
1163 smc_reset( dev->base_addr );
1164 smc_enable( dev->base_addr );
1165 dev->trans_start = jiffies;
1166 /* clear anything saved */
1167 ((struct smc_local *)netdev_priv(dev))->saved_skb = NULL;
1168 netif_wake_queue(dev);
1169 }
1170
1171 /*-------------------------------------------------------------
1172 .
1173 . smc_rcv - receive a packet from the card
1174 .
1175 . There is ( at least ) a packet waiting to be read from
1176 . chip-memory.
1177 .
1178 . o Read the status
1179 . o If an error, record it
1180 . o otherwise, read in the packet
1181 --------------------------------------------------------------
1182 */
1183 static void smc_rcv(struct net_device *dev)
1184 {
1185 int ioaddr = dev->base_addr;
1186 int packet_number;
1187 word status;
1188 word packet_length;
1189
1190 /* assume bank 2 */
1191
1192 packet_number = inw( ioaddr + FIFO_PORTS );
1193
1194 if ( packet_number & FP_RXEMPTY ) {
1195 /* we got called , but nothing was on the FIFO */
1196 PRINTK((CARDNAME ": WARNING: smc_rcv with nothing on FIFO. \n"));
1197 /* don't need to restore anything */
1198 return;
1199 }
1200
1201 /* start reading from the start of the packet */
1202 outw( PTR_READ | PTR_RCV | PTR_AUTOINC, ioaddr + POINTER );
1203
1204 /* First two words are status and packet_length */
1205 status = inw( ioaddr + DATA_1 );
1206 packet_length = inw( ioaddr + DATA_1 );
1207
1208 packet_length &= 0x07ff; /* mask off top bits */
1209
1210 PRINTK2(("RCV: STATUS %4x LENGTH %4x\n", status, packet_length ));
1211 /*
1212 . the packet length contains 3 extra words :
1213 . status, length, and an extra word with an odd byte .
1214 */
1215 packet_length -= 6;
1216
1217 if ( !(status & RS_ERRORS ) ){
1218 /* do stuff to make a new packet */
1219 struct sk_buff * skb;
1220 byte * data;
1221
1222 /* read one extra byte */
1223 if ( status & RS_ODDFRAME )
1224 packet_length++;
1225
1226 /* set multicast stats */
1227 if ( status & RS_MULTICAST )
1228 dev->stats.multicast++;
1229
1230 skb = dev_alloc_skb( packet_length + 5);
1231
1232 if ( skb == NULL ) {
1233 printk(KERN_NOTICE CARDNAME ": Low memory, packet dropped.\n");
1234 dev->stats.rx_dropped++;
1235 goto done;
1236 }
1237
1238 /*
1239 ! This should work without alignment, but it could be
1240 ! in the worse case
1241 */
1242
1243 skb_reserve( skb, 2 ); /* 16 bit alignment */
1244
1245 data = skb_put( skb, packet_length);
1246
1247 #ifdef USE_32_BIT
1248 /* QUESTION: Like in the TX routine, do I want
1249 to send the DWORDs or the bytes first, or some
1250 mixture. A mixture might improve already slow PIO
1251 performance */
1252 PRINTK3((" Reading %d dwords (and %d bytes) \n",
1253 packet_length >> 2, packet_length & 3 ));
1254 insl(ioaddr + DATA_1 , data, packet_length >> 2 );
1255 /* read the left over bytes */
1256 insb( ioaddr + DATA_1, data + (packet_length & 0xFFFFFC),
1257 packet_length & 0x3 );
1258 #else
1259 PRINTK3((" Reading %d words and %d byte(s) \n",
1260 (packet_length >> 1 ), packet_length & 1 ));
1261 insw(ioaddr + DATA_1 , data, packet_length >> 1);
1262 if ( packet_length & 1 ) {
1263 data += packet_length & ~1;
1264 *(data++) = inb( ioaddr + DATA_1 );
1265 }
1266 #endif
1267 #if SMC_DEBUG > 2
1268 print_packet( data, packet_length );
1269 #endif
1270
1271 skb->protocol = eth_type_trans(skb, dev );
1272 netif_rx(skb);
1273 dev->stats.rx_packets++;
1274 dev->stats.rx_bytes += packet_length;
1275 } else {
1276 /* error ... */
1277 dev->stats.rx_errors++;
1278
1279 if ( status & RS_ALGNERR ) dev->stats.rx_frame_errors++;
1280 if ( status & (RS_TOOSHORT | RS_TOOLONG ) )
1281 dev->stats.rx_length_errors++;
1282 if ( status & RS_BADCRC) dev->stats.rx_crc_errors++;
1283 }
1284
1285 done:
1286 /* error or good, tell the card to get rid of this packet */
1287 outw( MC_RELEASE, ioaddr + MMU_CMD );
1288 }
1289
1290
1291 /*************************************************************************
1292 . smc_tx
1293 .
1294 . Purpose: Handle a transmit error message. This will only be called
1295 . when an error, because of the AUTO_RELEASE mode.
1296 .
1297 . Algorithm:
1298 . Save pointer and packet no
1299 . Get the packet no from the top of the queue
1300 . check if it's valid ( if not, is this an error??? )
1301 . read the status word
1302 . record the error
1303 . ( resend? Not really, since we don't want old packets around )
1304 . Restore saved values
1305 ************************************************************************/
1306 static void smc_tx( struct net_device * dev )
1307 {
1308 int ioaddr = dev->base_addr;
1309 struct smc_local *lp = netdev_priv(dev);
1310 byte saved_packet;
1311 byte packet_no;
1312 word tx_status;
1313
1314
1315 /* assume bank 2 */
1316
1317 saved_packet = inb( ioaddr + PNR_ARR );
1318 packet_no = inw( ioaddr + FIFO_PORTS );
1319 packet_no &= 0x7F;
1320
1321 /* select this as the packet to read from */
1322 outb( packet_no, ioaddr + PNR_ARR );
1323
1324 /* read the first word from this packet */
1325 outw( PTR_AUTOINC | PTR_READ, ioaddr + POINTER );
1326
1327 tx_status = inw( ioaddr + DATA_1 );
1328 PRINTK3((CARDNAME": TX DONE STATUS: %4x \n", tx_status ));
1329
1330 dev->stats.tx_errors++;
1331 if ( tx_status & TS_LOSTCAR ) dev->stats.tx_carrier_errors++;
1332 if ( tx_status & TS_LATCOL ) {
1333 printk(KERN_DEBUG CARDNAME
1334 ": Late collision occurred on last xmit.\n");
1335 dev->stats.tx_window_errors++;
1336 }
1337 #if 0
1338 if ( tx_status & TS_16COL ) { ... }
1339 #endif
1340
1341 if ( tx_status & TS_SUCCESS ) {
1342 printk(CARDNAME": Successful packet caused interrupt \n");
1343 }
1344 /* re-enable transmit */
1345 SMC_SELECT_BANK( 0 );
1346 outw( inw( ioaddr + TCR ) | TCR_ENABLE, ioaddr + TCR );
1347
1348 /* kill the packet */
1349 SMC_SELECT_BANK( 2 );
1350 outw( MC_FREEPKT, ioaddr + MMU_CMD );
1351
1352 /* one less packet waiting for me */
1353 lp->packets_waiting--;
1354
1355 outb( saved_packet, ioaddr + PNR_ARR );
1356 return;
1357 }
1358
1359 /*--------------------------------------------------------------------
1360 .
1361 . This is the main routine of the driver, to handle the device when
1362 . it needs some attention.
1363 .
1364 . So:
1365 . first, save state of the chipset
1366 . branch off into routines to handle each case, and acknowledge
1367 . each to the interrupt register
1368 . and finally restore state.
1369 .
1370 ---------------------------------------------------------------------*/
1371
1372 static irqreturn_t smc_interrupt(int irq, void * dev_id)
1373 {
1374 struct net_device *dev = dev_id;
1375 int ioaddr = dev->base_addr;
1376 struct smc_local *lp = netdev_priv(dev);
1377
1378 byte status;
1379 word card_stats;
1380 byte mask;
1381 int timeout;
1382 /* state registers */
1383 word saved_bank;
1384 word saved_pointer;
1385 int handled = 0;
1386
1387
1388 PRINTK3((CARDNAME": SMC interrupt started \n"));
1389
1390 saved_bank = inw( ioaddr + BANK_SELECT );
1391
1392 SMC_SELECT_BANK(2);
1393 saved_pointer = inw( ioaddr + POINTER );
1394
1395 mask = inb( ioaddr + INT_MASK );
1396 /* clear all interrupts */
1397 outb( 0, ioaddr + INT_MASK );
1398
1399
1400 /* set a timeout value, so I don't stay here forever */
1401 timeout = 4;
1402
1403 PRINTK2((KERN_WARNING CARDNAME ": MASK IS %x \n", mask ));
1404 do {
1405 /* read the status flag, and mask it */
1406 status = inb( ioaddr + INTERRUPT ) & mask;
1407 if (!status )
1408 break;
1409
1410 handled = 1;
1411
1412 PRINTK3((KERN_WARNING CARDNAME
1413 ": Handling interrupt status %x \n", status ));
1414
1415 if (status & IM_RCV_INT) {
1416 /* Got a packet(s). */
1417 PRINTK2((KERN_WARNING CARDNAME
1418 ": Receive Interrupt\n"));
1419 smc_rcv(dev);
1420 } else if (status & IM_TX_INT ) {
1421 PRINTK2((KERN_WARNING CARDNAME
1422 ": TX ERROR handled\n"));
1423 smc_tx(dev);
1424 outb(IM_TX_INT, ioaddr + INTERRUPT );
1425 } else if (status & IM_TX_EMPTY_INT ) {
1426 /* update stats */
1427 SMC_SELECT_BANK( 0 );
1428 card_stats = inw( ioaddr + COUNTER );
1429 /* single collisions */
1430 dev->stats.collisions += card_stats & 0xF;
1431 card_stats >>= 4;
1432 /* multiple collisions */
1433 dev->stats.collisions += card_stats & 0xF;
1434
1435 /* these are for when linux supports these statistics */
1436
1437 SMC_SELECT_BANK( 2 );
1438 PRINTK2((KERN_WARNING CARDNAME
1439 ": TX_BUFFER_EMPTY handled\n"));
1440 outb( IM_TX_EMPTY_INT, ioaddr + INTERRUPT );
1441 mask &= ~IM_TX_EMPTY_INT;
1442 dev->stats.tx_packets += lp->packets_waiting;
1443 lp->packets_waiting = 0;
1444
1445 } else if (status & IM_ALLOC_INT ) {
1446 PRINTK2((KERN_DEBUG CARDNAME
1447 ": Allocation interrupt \n"));
1448 /* clear this interrupt so it doesn't happen again */
1449 mask &= ~IM_ALLOC_INT;
1450
1451 smc_hardware_send_packet( dev );
1452
1453 /* enable xmit interrupts based on this */
1454 mask |= ( IM_TX_EMPTY_INT | IM_TX_INT );
1455
1456 /* and let the card send more packets to me */
1457 netif_wake_queue(dev);
1458
1459 PRINTK2((CARDNAME": Handoff done successfully.\n"));
1460 } else if (status & IM_RX_OVRN_INT ) {
1461 dev->stats.rx_errors++;
1462 dev->stats.rx_fifo_errors++;
1463 outb( IM_RX_OVRN_INT, ioaddr + INTERRUPT );
1464 } else if (status & IM_EPH_INT ) {
1465 PRINTK((CARDNAME ": UNSUPPORTED: EPH INTERRUPT \n"));
1466 } else if (status & IM_ERCV_INT ) {
1467 PRINTK((CARDNAME ": UNSUPPORTED: ERCV INTERRUPT \n"));
1468 outb( IM_ERCV_INT, ioaddr + INTERRUPT );
1469 }
1470 } while ( timeout -- );
1471
1472
1473 /* restore state register */
1474 SMC_SELECT_BANK( 2 );
1475 outb( mask, ioaddr + INT_MASK );
1476
1477 PRINTK3(( KERN_WARNING CARDNAME ": MASK is now %x \n", mask ));
1478 outw( saved_pointer, ioaddr + POINTER );
1479
1480 SMC_SELECT_BANK( saved_bank );
1481
1482 PRINTK3((CARDNAME ": Interrupt done\n"));
1483 return IRQ_RETVAL(handled);
1484 }
1485
1486
1487 /*----------------------------------------------------
1488 . smc_close
1489 .
1490 . this makes the board clean up everything that it can
1491 . and not talk to the outside world. Caused by
1492 . an 'ifconfig ethX down'
1493 .
1494 -----------------------------------------------------*/
1495 static int smc_close(struct net_device *dev)
1496 {
1497 netif_stop_queue(dev);
1498 /* clear everything */
1499 smc_shutdown( dev->base_addr );
1500
1501 /* Update the statistics here. */
1502 return 0;
1503 }
1504
1505 /*-----------------------------------------------------------
1506 . smc_set_multicast_list
1507 .
1508 . This routine will, depending on the values passed to it,
1509 . either make it accept multicast packets, go into
1510 . promiscuous mode ( for TCPDUMP and cousins ) or accept
1511 . a select set of multicast packets
1512 */
1513 static void smc_set_multicast_list(struct net_device *dev)
1514 {
1515 short ioaddr = dev->base_addr;
1516
1517 SMC_SELECT_BANK(0);
1518 if ( dev->flags & IFF_PROMISC )
1519 outw( inw(ioaddr + RCR ) | RCR_PROMISC, ioaddr + RCR );
1520
1521 /* BUG? I never disable promiscuous mode if multicasting was turned on.
1522 Now, I turn off promiscuous mode, but I don't do anything to multicasting
1523 when promiscuous mode is turned on.
1524 */
1525
1526 /* Here, I am setting this to accept all multicast packets.
1527 I don't need to zero the multicast table, because the flag is
1528 checked before the table is
1529 */
1530 else if (dev->flags & IFF_ALLMULTI)
1531 outw( inw(ioaddr + RCR ) | RCR_ALMUL, ioaddr + RCR );
1532
1533 /* We just get all multicast packets even if we only want them
1534 . from one source. This will be changed at some future
1535 . point. */
1536 else if (dev->mc_count ) {
1537 /* support hardware multicasting */
1538
1539 /* be sure I get rid of flags I might have set */
1540 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1541 ioaddr + RCR );
1542 /* NOTE: this has to set the bank, so make sure it is the
1543 last thing called. The bank is set to zero at the top */
1544 smc_setmulticast( ioaddr, dev->mc_count, dev->mc_list );
1545 }
1546 else {
1547 outw( inw( ioaddr + RCR ) & ~(RCR_PROMISC | RCR_ALMUL),
1548 ioaddr + RCR );
1549
1550 /*
1551 since I'm disabling all multicast entirely, I need to
1552 clear the multicast list
1553 */
1554 SMC_SELECT_BANK( 3 );
1555 outw( 0, ioaddr + MULTICAST1 );
1556 outw( 0, ioaddr + MULTICAST2 );
1557 outw( 0, ioaddr + MULTICAST3 );
1558 outw( 0, ioaddr + MULTICAST4 );
1559 }
1560 }
1561
1562 #ifdef MODULE
1563
1564 static struct net_device *devSMC9194;
1565 MODULE_LICENSE("GPL");
1566
1567 module_param(io, int, 0);
1568 module_param(irq, int, 0);
1569 module_param(ifport, int, 0);
1570 MODULE_PARM_DESC(io, "SMC 99194 I/O base address");
1571 MODULE_PARM_DESC(irq, "SMC 99194 IRQ number");
1572 MODULE_PARM_DESC(ifport, "SMC 99194 interface port (0-default, 1-TP, 2-AUI)");
1573
1574 int __init init_module(void)
1575 {
1576 if (io == 0)
1577 printk(KERN_WARNING
1578 CARDNAME": You shouldn't use auto-probing with insmod!\n" );
1579
1580 /* copy the parameters from insmod into the device structure */
1581 devSMC9194 = smc_init(-1);
1582 if (IS_ERR(devSMC9194))
1583 return PTR_ERR(devSMC9194);
1584 return 0;
1585 }
1586
1587 void __exit cleanup_module(void)
1588 {
1589 unregister_netdev(devSMC9194);
1590 free_irq(devSMC9194->irq, devSMC9194);
1591 release_region(devSMC9194->base_addr, SMC_IO_EXTENT);
1592 free_netdev(devSMC9194);
1593 }
1594
1595 #endif /* MODULE */
Linux kernel - Deliverables
This page took 0.063694 seconds and 5 git commands to generate.