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[linux-2.6-block.git] / drivers / net / ibmlana.c
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d7fbeba6 1/*
1da177e4
LT		 2net-3-driver for the IBM LAN Adapter/A
3
4This is an extension to the Linux operating system, and is covered by the
5same GNU General Public License that covers that work.
6
7Copyright 1999 by Alfred Arnold (alfred@ccac.rwth-aachen.de,
8 alfred.arnold@lancom.de)
9
10This driver is based both on the SK_MCA driver, which is itself based on the
11SK_G16 and 3C523 driver.
12
13paper sources:
d7fbeba6 14 'PC Hardware: Aufbau, Funktionsweise, Programmierung' by
1da177e4 15 Hans-Peter Messmer for the basic Microchannel stuff
d7fbeba6 16
1da177e4
LT		 17 'Linux Geraetetreiber' by Allesandro Rubini, Kalle Dalheimer
18 for help on Ethernet driver programming
19
20 'DP83934CVUL-20/25 MHz SONIC-T Ethernet Controller Datasheet' by National
21 Semiconductor for info on the MAC chip
22
23 'LAN Technical Reference Ethernet Adapter Interface Version 1 Release 1.0
24 Document Number SC30-3661-00' by IBM for info on the adapter itself
25
26 Also see http://www.natsemi.com/
27
28special acknowledgements to:
29 - Bob Eager for helping me out with documentation from IBM
d7fbeba6 30 - Jim Shorney for his endless patience with me while I was using
1da177e4
LT		 31 him as a beta tester to trace down the address filter bug ;-)
32
33 Missing things:
34
35 -> set debug level via ioctl instead of compile-time switches
36 -> I didn't follow the development of the 2.1.x kernels, so my
d7fbeba6 37 assumptions about which things changed with which kernel version
1da177e4
LT		 38 are probably nonsense
39
40History:
41 Nov 6th, 1999
42 startup from SK_MCA driver
43 Dec 6th, 1999
44 finally got docs about the card. A big thank you to Bob Eager!
45 Dec 12th, 1999
46 first packet received
47 Dec 13th, 1999
48 recv queue done, tcpdump works
49 Dec 15th, 1999
50 transmission part works
51 Dec 28th, 1999
52 added usage of the isa_functions for Linux 2.3 . Things should
53 still work with 2.0.x....
54 Jan 28th, 2000
55 in Linux 2.2.13, the version.h file mysteriously didn't get
56 included. Added a workaround for this. Futhermore, it now
57 not only compiles as a modules ;-)
58 Jan 30th, 2000
59 newer kernels automatically probe more than one board, so the
60 'startslot' as a variable is also needed here
61 Apr 12th, 2000
62 the interrupt mask register is not set 'hard' instead of individually
63 setting registers, since this seems to set bits that shouldn't be
64 set
65 May 21st, 2000
66 reset interrupt status immediately after CAM load
67 add a recovery delay after releasing the chip's reset line
68 May 24th, 2000
69 finally found the bug in the address filter setup - damned signed
70 chars!
71 June 1st, 2000
72 corrected version codes, added support for the latest 2.3 changes
73 Oct 28th, 2002
74 cleaned up for the 2.5 tree <alan@redhat.com>
75
76 *************************************************************************/
77
78#include <linux/kernel.h>
79#include <linux/string.h>
80#include <linux/errno.h>
81#include <linux/ioport.h>
82#include <linux/slab.h>
83#include <linux/interrupt.h>
84#include <linux/delay.h>
85#include <linux/time.h>
3df5920c 86#include <linux/mca.h>
1da177e4
LT		 87#include <linux/module.h>
88#include <linux/netdevice.h>
89#include <linux/etherdevice.h>
90#include <linux/skbuff.h>
91#include <linux/bitops.h>
92
93#include <asm/processor.h>
94#include <asm/io.h>
95
96#define _IBM_LANA_DRIVER_
97#include "ibmlana.h"
98
99#undef DEBUG
100
101#define DRV_NAME "ibmlana"
102
103/* ------------------------------------------------------------------------
104 * global static data - not more since we can handle multiple boards and
105 * have to pack all state info into the device struct!
106 * ------------------------------------------------------------------------ */
107
108static char *MediaNames[Media_Count] = {
109 "10BaseT", "10Base5", "Unknown", "10Base2"
110};
111
112/* ------------------------------------------------------------------------
113 * private subfunctions
114 * ------------------------------------------------------------------------ */
115
116#ifdef DEBUG
117 /* dump all registers */
118
119static void dumpregs(struct net_device *dev)
120{
121 int z;
122
123 for (z = 0; z < 160; z += 2) {
124 if (!(z & 15))
125 printk("REGS: %04x:", z);
126 printk(" %04x", inw(dev->base_addr + z));
127 if ((z & 15) == 14)
128 printk("\n");
129 }
130}
131
132/* dump parts of shared memory - only needed during debugging */
133
134static void dumpmem(struct net_device *dev, u32 start, u32 len)
135{
136 ibmlana_priv *priv = netdev_priv(dev);
137 int z;
138
139 printk("Address %04x:\n", start);
140 for (z = 0; z < len; z++) {
141 if ((z & 15) == 0)
142 printk("%04x:", z);
143 printk(" %02x", readb(priv->base + start + z));
144 if ((z & 15) == 15)
145 printk("\n");
146 }
147 if ((z & 15) != 0)
148 printk("\n");
149}
150
151/* print exact time - ditto */
152
153static void PrTime(void)
154{
155 struct timeval tv;
156
157 do_gettimeofday(&tv);
158 printk("%9d:%06d: ", (int) tv.tv_sec, (int) tv.tv_usec);
159}
160#endif /* DEBUG */
161
162/* deduce resources out of POS registers */
163
3df5920c
JG		 164static void getaddrs(struct mca_device *mdev, int *base, int *memlen,
165 int *iobase, int *irq, ibmlana_medium *medium)
1da177e4
LT		 166{
167 u_char pos0, pos1;
168
3df5920c
JG		 169 pos0 = mca_device_read_stored_pos(mdev, 2);
170 pos1 = mca_device_read_stored_pos(mdev, 3);
1da177e4
LT		 171
172 *base = 0xc0000 + ((pos1 & 0xf0) << 9);
173 *memlen = (pos1 & 0x01) ? 0x8000 : 0x4000;
174 *iobase = (pos0 & 0xe0) << 7;
175 switch (pos0 & 0x06) {
176 case 0:
177 *irq = 5;
178 break;
179 case 2:
180 *irq = 15;
181 break;
182 case 4:
183 *irq = 10;
184 break;
185 case 6:
186 *irq = 11;
187 break;
188 }
189 *medium = (pos0 & 0x18) >> 3;
190}
191
192/* wait on register value with mask and timeout */
193
194static int wait_timeout(struct net_device *dev, int regoffs, u16 mask,
195 u16 value, int timeout)
196{
197 unsigned long fin = jiffies + timeout;
198
199 while (time_before(jiffies,fin))
200 if ((inw(dev->base_addr + regoffs) & mask) == value)
201 return 1;
202
203 return 0;
204}
205
206
207/* reset the whole board */
208
209static void ResetBoard(struct net_device *dev)
210{
211 unsigned char bcmval;
212
213 /* read original board control value */
214
215 bcmval = inb(dev->base_addr + BCMREG);
216
217 /* set reset bit for a while */
218
219 bcmval |= BCMREG_RESET;
220 outb(bcmval, dev->base_addr + BCMREG);
221 udelay(10);
222 bcmval &= ~BCMREG_RESET;
223 outb(bcmval, dev->base_addr + BCMREG);
224
225 /* switch over to RAM again */
226
227 bcmval |= BCMREG_RAMEN | BCMREG_RAMWIN;
228 outb(bcmval, dev->base_addr + BCMREG);
229}
230
231/* calculate RAM layout & set up descriptors in RAM */
232
233static void InitDscrs(struct net_device *dev)
234{
235 ibmlana_priv *priv = netdev_priv(dev);
236 u32 addr, baddr, raddr;
237 int z;
238 tda_t tda;
239 rda_t rda;
240 rra_t rra;
241
242 /* initialize RAM */
243
244 memset_io(priv->base, 0xaa,
245 dev->mem_start - dev->mem_start); /* XXX: typo? */
246
247 /* setup n TX descriptors - independent of RAM size */
248
249 priv->tdastart = addr = 0;
250 priv->txbufstart = baddr = sizeof(tda_t) * TXBUFCNT;
251 for (z = 0; z < TXBUFCNT; z++) {
252 tda.status = 0;
253 tda.config = 0;
254 tda.length = 0;
255 tda.fragcount = 1;
256 tda.startlo = baddr;
257 tda.starthi = 0;
258 tda.fraglength = 0;
259 if (z == TXBUFCNT - 1)
260 tda.link = priv->tdastart;
261 else
262 tda.link = addr + sizeof(tda_t);
263 tda.link |= 1;
264 memcpy_toio(priv->base + addr, &tda, sizeof(tda_t));
265 addr += sizeof(tda_t);
266 baddr += PKTSIZE;
267 }
268
269 /* calculate how many receive buffers fit into remaining memory */
270
271 priv->rxbufcnt = (dev->mem_end - dev->mem_start - baddr) / (sizeof(rra_t) + sizeof(rda_t) + PKTSIZE);
272
273 /* calculate receive addresses */
274
275 priv->rrastart = raddr = priv->txbufstart + (TXBUFCNT * PKTSIZE);
276 priv->rdastart = addr = priv->rrastart + (priv->rxbufcnt * sizeof(rra_t));
277 priv->rxbufstart = baddr = priv->rdastart + (priv->rxbufcnt * sizeof(rda_t));
d7fbeba6 278
1da177e4
LT		 279 for (z = 0; z < priv->rxbufcnt; z++) {
280 rra.startlo = baddr;
281 rra.starthi = 0;
282 rra.cntlo = PKTSIZE >> 1;
283 rra.cnthi = 0;
284 memcpy_toio(priv->base + raddr, &rra, sizeof(rra_t));
285
286 rda.status = 0;
287 rda.length = 0;
288 rda.startlo = 0;
289 rda.starthi = 0;
290 rda.seqno = 0;
291 if (z < priv->rxbufcnt - 1)
292 rda.link = addr + sizeof(rda_t);
293 else
294 rda.link = 1;
295 rda.inuse = 1;
296 memcpy_toio(priv->base + addr, &rda, sizeof(rda_t));
297
298 baddr += PKTSIZE;
299 raddr += sizeof(rra_t);
300 addr += sizeof(rda_t);
301 }
302
303 /* initialize current pointers */
304
305 priv->nextrxdescr = 0;
306 priv->lastrxdescr = priv->rxbufcnt - 1;
307 priv->nexttxdescr = 0;
308 priv->currtxdescr = 0;
309 priv->txusedcnt = 0;
310 memset(priv->txused, 0, sizeof(priv->txused));
311}
312
313/* set up Rx + Tx descriptors in SONIC */
314
315static int InitSONIC(struct net_device *dev)
316{
317 ibmlana_priv *priv = netdev_priv(dev);
318
319 /* set up start & end of resource area */
320
321 outw(0, SONIC_URRA);
322 outw(priv->rrastart, dev->base_addr + SONIC_RSA);
323 outw(priv->rrastart + (priv->rxbufcnt * sizeof(rra_t)), dev->base_addr + SONIC_REA);
324 outw(priv->rrastart, dev->base_addr + SONIC_RRP);
325 outw(priv->rrastart, dev->base_addr + SONIC_RWP);
326
327 /* set EOBC so that only one packet goes into one buffer */
328
329 outw((PKTSIZE - 4) >> 1, dev->base_addr + SONIC_EOBC);
330
331 /* let SONIC read the first RRA descriptor */
332
333 outw(CMDREG_RRRA, dev->base_addr + SONIC_CMDREG);
334 if (!wait_timeout(dev, SONIC_CMDREG, CMDREG_RRRA, 0, 2)) {
335 printk(KERN_ERR "%s: SONIC did not respond on RRRA command - giving up.", dev->name);
336 return 0;
337 }
338
339 /* point SONIC to the first RDA */
340
341 outw(0, dev->base_addr + SONIC_URDA);
342 outw(priv->rdastart, dev->base_addr + SONIC_CRDA);
343
344 /* set upper half of TDA address */
345
346 outw(0, dev->base_addr + SONIC_UTDA);
347
348 return 1;
349}
350
351/* stop SONIC so we can reinitialize it */
352
353static void StopSONIC(struct net_device *dev)
354{
355 /* disable interrupts */
356
357 outb(inb(dev->base_addr + BCMREG) & (~BCMREG_IEN), dev->base_addr + BCMREG);
358 outb(0, dev->base_addr + SONIC_IMREG);
359
360 /* reset the SONIC */
361
362 outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
363 udelay(10);
364 outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
365}
366
367/* initialize card and SONIC for proper operation */
368
369static void putcam(camentry_t * cams, int *camcnt, char *addr)
370{
371 camentry_t *pcam = cams + (*camcnt);
372 u8 *uaddr = (u8 *) addr;
373
374 pcam->index = *camcnt;
375 pcam->addr0 = (((u16) uaddr[1]) << 8) | uaddr[0];
376 pcam->addr1 = (((u16) uaddr[3]) << 8) | uaddr[2];
377 pcam->addr2 = (((u16) uaddr[5]) << 8) | uaddr[4];
378 (*camcnt)++;
379}
380
381static void InitBoard(struct net_device *dev)
382{
383 ibmlana_priv *priv = netdev_priv(dev);
384 int camcnt;
385 camentry_t cams[16];
386 u32 cammask;
387 struct dev_mc_list *mcptr;
388 u16 rcrval;
389
390 /* reset the SONIC */
391
392 outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
393 udelay(10);
394
395 /* clear all spurious interrupts */
396
397 outw(inw(dev->base_addr + SONIC_ISREG), dev->base_addr + SONIC_ISREG);
398
399 /* set up the SONIC's bus interface - constant for this adapter -
400 must be done while the SONIC is in reset */
401
402 outw(DCREG_USR1 | DCREG_USR0 | DCREG_WC1 | DCREG_DW32, dev->base_addr + SONIC_DCREG);
403 outw(0, dev->base_addr + SONIC_DCREG2);
404
405 /* remove reset form the SONIC */
406
407 outw(0, dev->base_addr + SONIC_CMDREG);
408 udelay(10);
409
410 /* data sheet requires URRA to be programmed before setting up the CAM contents */
411
412 outw(0, dev->base_addr + SONIC_URRA);
413
414 /* program the CAM entry 0 to the device address */
415
416 camcnt = 0;
417 putcam(cams, &camcnt, dev->dev_addr);
418
419 /* start putting the multicast addresses into the CAM list. Stop if
420 it is full. */
421
422 for (mcptr = dev->mc_list; mcptr != NULL; mcptr = mcptr->next) {
423 putcam(cams, &camcnt, mcptr->dmi_addr);
424 if (camcnt == 16)
425 break;
426 }
427
428 /* calculate CAM mask */
429
430 cammask = (1 << camcnt) - 1;
431
432 /* feed CDA into SONIC, initialize RCR value (always get broadcasts) */
433
434 memcpy_toio(priv->base, cams, sizeof(camentry_t) * camcnt);
435 memcpy_toio(priv->base + (sizeof(camentry_t) * camcnt), &cammask, sizeof(cammask));
436
437#ifdef DEBUG
438 printk("CAM setup:\n");
439 dumpmem(dev, 0, sizeof(camentry_t) * camcnt + sizeof(cammask));
440#endif
441
442 outw(0, dev->base_addr + SONIC_CAMPTR);
443 outw(camcnt, dev->base_addr + SONIC_CAMCNT);
444 outw(CMDREG_LCAM, dev->base_addr + SONIC_CMDREG);
445 if (!wait_timeout(dev, SONIC_CMDREG, CMDREG_LCAM, 0, 2)) {
446 printk(KERN_ERR "%s:SONIC did not respond on LCAM command - giving up.", dev->name);
447 return;
448 } else {
449 /* clear interrupt condition */
450
451 outw(ISREG_LCD, dev->base_addr + SONIC_ISREG);
452
453#ifdef DEBUG
454 printk("Loading CAM done, address pointers %04x:%04x\n",
455 inw(dev->base_addr + SONIC_URRA),
456 inw(dev->base_addr + SONIC_CAMPTR));
457 {
458 int z;
459
460 printk("\n-->CAM: PTR %04x CNT %04x\n",
461 inw(dev->base_addr + SONIC_CAMPTR),
462 inw(dev->base_addr + SONIC_CAMCNT));
463 outw(CMDREG_RST, dev->base_addr + SONIC_CMDREG);
464 for (z = 0; z < camcnt; z++) {
465 outw(z, dev->base_addr + SONIC_CAMEPTR);
466 printk("Entry %d: %04x %04x %04x\n", z,
467 inw(dev->base_addr + SONIC_CAMADDR0),
468 inw(dev->base_addr + SONIC_CAMADDR1),
469 inw(dev->base_addr + SONIC_CAMADDR2));
470 }
471 outw(0, dev->base_addr + SONIC_CMDREG);
472 }
473#endif
474 }
475
476 rcrval = RCREG_BRD | RCREG_LB_NONE;
477
478 /* if still multicast addresses left or ALLMULTI is set, set the multicast
479 enable bit */
480
481 if ((dev->flags & IFF_ALLMULTI) || (mcptr != NULL))
482 rcrval |= RCREG_AMC;
483
484 /* promiscous mode ? */
485
486 if (dev->flags & IFF_PROMISC)
487 rcrval |= RCREG_PRO;
488
489 /* program receive mode */
490
491 outw(rcrval, dev->base_addr + SONIC_RCREG);
492#ifdef DEBUG
493 printk("\nRCRVAL: %04x\n", rcrval);
494#endif
495
496 /* set up descriptors in shared memory + feed them into SONIC registers */
497
498 InitDscrs(dev);
499 if (!InitSONIC(dev))
500 return;
501
502 /* reset all pending interrupts */
503
504 outw(0xffff, dev->base_addr + SONIC_ISREG);
505
506 /* enable transmitter + receiver interrupts */
507
508 outw(CMDREG_RXEN, dev->base_addr + SONIC_CMDREG);
509 outw(IMREG_PRXEN | IMREG_RBEEN | IMREG_PTXEN | IMREG_TXEREN, dev->base_addr + SONIC_IMREG);
510
511 /* turn on card interrupts */
512
513 outb(inb(dev->base_addr + BCMREG) | BCMREG_IEN, dev->base_addr + BCMREG);
514
515#ifdef DEBUG
516 printk("Register dump after initialization:\n");
517 dumpregs(dev);
518#endif
519}
520
521/* start transmission of a descriptor */
522
523static void StartTx(struct net_device *dev, int descr)
524{
525 ibmlana_priv *priv = netdev_priv(dev);
526 int addr;
527
528 addr = priv->tdastart + (descr * sizeof(tda_t));
529
530 /* put descriptor address into SONIC */
531
532 outw(addr, dev->base_addr + SONIC_CTDA);
533
534 /* trigger transmitter */
535
536 priv->currtxdescr = descr;
537 outw(CMDREG_TXP, dev->base_addr + SONIC_CMDREG);
538}
539
540/* ------------------------------------------------------------------------
541 * interrupt handler(s)
542 * ------------------------------------------------------------------------ */
543
544/* receive buffer area exhausted */
545
546static void irqrbe_handler(struct net_device *dev)
547{
548 ibmlana_priv *priv = netdev_priv(dev);
549
550 /* point the SONIC back to the RRA start */
551
552 outw(priv->rrastart, dev->base_addr + SONIC_RRP);
553 outw(priv->rrastart, dev->base_addr + SONIC_RWP);
554}
555
556/* receive interrupt */
557
558static void irqrx_handler(struct net_device *dev)
559{
560 ibmlana_priv *priv = netdev_priv(dev);
561 rda_t rda;
562 u32 rdaaddr, lrdaaddr;
563
564 /* loop until ... */
565
566 while (1) {
567 /* read descriptor that was next to be filled by SONIC */
568
569 rdaaddr = priv->rdastart + (priv->nextrxdescr * sizeof(rda_t));
570 lrdaaddr = priv->rdastart + (priv->lastrxdescr * sizeof(rda_t));
571 memcpy_fromio(&rda, priv->base + rdaaddr, sizeof(rda_t));
572
d7fbeba6 573 /* iron out upper word halves of fields we use - SONIC will duplicate
1da177e4
LT		 574 bits 0..15 to 16..31 */
575
576 rda.status &= 0xffff;
577 rda.length &= 0xffff;
578 rda.startlo &= 0xffff;
579
580 /* stop if the SONIC still owns it, i.e. there is no data for us */
581
582 if (rda.inuse)
583 break;
584
585 /* good packet? */
586
587 else if (rda.status & RCREG_PRX) {
588 struct sk_buff *skb;
589
590 /* fetch buffer */
591
592 skb = dev_alloc_skb(rda.length + 2);
593 if (skb == NULL)
09f75cd7 594 dev->stats.rx_dropped++;
1da177e4
LT		 595 else {
596 /* copy out data */
597
598 memcpy_fromio(skb_put(skb, rda.length),
599 priv->base +
600 rda.startlo, rda.length);
601
602 /* set up skb fields */
603
1da177e4
LT		 604 skb->protocol = eth_type_trans(skb, dev);
605 skb->ip_summed = CHECKSUM_NONE;
606
607 /* bookkeeping */
608 dev->last_rx = jiffies;
09f75cd7
JG		 609 dev->stats.rx_packets++;
610 dev->stats.rx_bytes += rda.length;
1da177e4
LT		 611
612 /* pass to the upper layers */
613 netif_rx(skb);
614 }
615 }
616
617 /* otherwise check error status bits and increase statistics */
618
619 else {
09f75cd7 620 dev->stats.rx_errors++;
1da177e4 621 if (rda.status & RCREG_FAER)
09f75cd7 622 dev->stats.rx_frame_errors++;
1da177e4 623 if (rda.status & RCREG_CRCR)
09f75cd7 624 dev->stats.rx_crc_errors++;
1da177e4
LT		 625 }
626
627 /* descriptor processed, will become new last descriptor in queue */
628
629 rda.link = 1;
630 rda.inuse = 1;
631 memcpy_toio(priv->base + rdaaddr, &rda,
632 sizeof(rda_t));
633
634 /* set up link and EOL = 0 in currently last descriptor. Only write
635 the link field since the SONIC may currently already access the
636 other fields. */
637
638 memcpy_toio(priv->base + lrdaaddr + 20, &rdaaddr, 4);
639
640 /* advance indices */
641
642 priv->lastrxdescr = priv->nextrxdescr;
643 if ((++priv->nextrxdescr) >= priv->rxbufcnt)
644 priv->nextrxdescr = 0;
645 }
646}
647
648/* transmit interrupt */
649
650static void irqtx_handler(struct net_device *dev)
651{
652 ibmlana_priv *priv = netdev_priv(dev);
653 tda_t tda;
654
655 /* fetch descriptor (we forgot the size ;-) */
656 memcpy_fromio(&tda, priv->base + priv->tdastart + (priv->currtxdescr * sizeof(tda_t)), sizeof(tda_t));
657
658 /* update statistics */
09f75cd7
JG		 659 dev->stats.tx_packets++;
660 dev->stats.tx_bytes += tda.length;
1da177e4
LT		 661
662 /* update our pointers */
663 priv->txused[priv->currtxdescr] = 0;
664 priv->txusedcnt--;
665
666 /* if there are more descriptors present in RAM, start them */
667 if (priv->txusedcnt > 0)
668 StartTx(dev, (priv->currtxdescr + 1) % TXBUFCNT);
669
670 /* tell the upper layer we can go on transmitting */
671 netif_wake_queue(dev);
672}
673
674static void irqtxerr_handler(struct net_device *dev)
675{
676 ibmlana_priv *priv = netdev_priv(dev);
677 tda_t tda;
678
679 /* fetch descriptor to check status */
680 memcpy_fromio(&tda, priv->base + priv->tdastart + (priv->currtxdescr * sizeof(tda_t)), sizeof(tda_t));
681
682 /* update statistics */
09f75cd7 683 dev->stats.tx_errors++;
1da177e4 684 if (tda.status & (TCREG_NCRS | TCREG_CRSL))
09f75cd7 685 dev->stats.tx_carrier_errors++;
1da177e4 686 if (tda.status & TCREG_EXC)
09f75cd7 687 dev->stats.tx_aborted_errors++;
1da177e4 688 if (tda.status & TCREG_OWC)
09f75cd7 689 dev->stats.tx_window_errors++;
1da177e4 690 if (tda.status & TCREG_FU)
09f75cd7 691 dev->stats.tx_fifo_errors++;
1da177e4
LT		 692
693 /* update our pointers */
694 priv->txused[priv->currtxdescr] = 0;
695 priv->txusedcnt--;
696
697 /* if there are more descriptors present in RAM, start them */
698 if (priv->txusedcnt > 0)
699 StartTx(dev, (priv->currtxdescr + 1) % TXBUFCNT);
700
701 /* tell the upper layer we can go on transmitting */
702 netif_wake_queue(dev);
703}
704
705/* general interrupt entry */
706
28fc1f5a 707static irqreturn_t irq_handler(int dummy, void *device)
1da177e4 708{
28fc1f5a 709 struct net_device *dev = device;
1da177e4
LT		 710 u16 ival;
711
712 /* in case we're not meant... */
713 if (!(inb(dev->base_addr + BCMREG) & BCMREG_IPEND))
714 return IRQ_NONE;
715
716 /* loop through the interrupt bits until everything is clear */
717 while (1) {
718 ival = inw(dev->base_addr + SONIC_ISREG);
719
720 if (ival & ISREG_RBE) {
721 irqrbe_handler(dev);
722 outw(ISREG_RBE, dev->base_addr + SONIC_ISREG);
723 }
724 if (ival & ISREG_PKTRX) {
725 irqrx_handler(dev);
726 outw(ISREG_PKTRX, dev->base_addr + SONIC_ISREG);
727 }
728 if (ival & ISREG_TXDN) {
729 irqtx_handler(dev);
730 outw(ISREG_TXDN, dev->base_addr + SONIC_ISREG);
731 }
732 if (ival & ISREG_TXER) {
733 irqtxerr_handler(dev);
734 outw(ISREG_TXER, dev->base_addr + SONIC_ISREG);
735 }
736 break;
737 }
738 return IRQ_HANDLED;
739}
740
741/* ------------------------------------------------------------------------
742 * driver methods
743 * ------------------------------------------------------------------------ */
744
745/* MCA info */
746
3df5920c 747#if 0 /* info available elsewhere, but this is kept for reference */
1da177e4
LT		 748static int ibmlana_getinfo(char *buf, int slot, void *d)
749{
750 int len = 0, i;
751 struct net_device *dev = (struct net_device *) d;
752 ibmlana_priv *priv;
753
754 /* can't say anything about an uninitialized device... */
755
756 if (dev == NULL)
757 return len;
758 priv = netdev_priv(dev);
759
760 /* print info */
761
762 len += sprintf(buf + len, "IRQ: %d\n", priv->realirq);
763 len += sprintf(buf + len, "I/O: %#lx\n", dev->base_addr);
764 len += sprintf(buf + len, "Memory: %#lx-%#lx\n", dev->mem_start, dev->mem_end - 1);
765 len += sprintf(buf + len, "Transceiver: %s\n", MediaNames[priv->medium]);
766 len += sprintf(buf + len, "Device: %s\n", dev->name);
767 len += sprintf(buf + len, "MAC address:");
768 for (i = 0; i < 6; i++)
769 len += sprintf(buf + len, " %02x", dev->dev_addr[i]);
770 buf[len++] = '\n';
771 buf[len] = 0;
772
773 return len;
774}
3df5920c 775#endif
1da177e4
LT		 776
777/* open driver. Means also initialization and start of LANCE */
778
779static int ibmlana_open(struct net_device *dev)
780{
781 int result;
782 ibmlana_priv *priv = netdev_priv(dev);
783
784 /* register resources - only necessary for IRQ */
785
1fb9df5d 786 result = request_irq(priv->realirq, irq_handler, IRQF_SHARED | IRQF_SAMPLE_RANDOM, dev->name, dev);
1da177e4
LT		 787 if (result != 0) {
788 printk(KERN_ERR "%s: failed to register irq %d\n", dev->name, dev->irq);
789 return result;
790 }
791 dev->irq = priv->realirq;
792
793 /* set up the card and SONIC */
794 InitBoard(dev);
795
796 /* initialize operational flags */
797 netif_start_queue(dev);
798 return 0;
799}
800
801/* close driver. Shut down board and free allocated resources */
802
803static int ibmlana_close(struct net_device *dev)
804{
805 /* turn off board */
806
807 /* release resources */
808 if (dev->irq != 0)
809 free_irq(dev->irq, dev);
810 dev->irq = 0;
811 return 0;
812}
813
814/* transmit a block. */
815
816static int ibmlana_tx(struct sk_buff *skb, struct net_device *dev)
817{
818 ibmlana_priv *priv = netdev_priv(dev);
819 int retval = 0, tmplen, addr;
820 unsigned long flags;
821 tda_t tda;
822 int baddr;
823
824 /* find out if there are free slots for a frame to transmit. If not,
825 the upper layer is in deep desperation and we simply ignore the frame. */
826
827 if (priv->txusedcnt >= TXBUFCNT) {
828 retval = -EIO;
09f75cd7 829 dev->stats.tx_dropped++;
1da177e4
LT		 830 goto tx_done;
831 }
832
833 /* copy the frame data into the next free transmit buffer - fillup missing */
834 tmplen = skb->len;
835 if (tmplen < 60)
836 tmplen = 60;
837 baddr = priv->txbufstart + (priv->nexttxdescr * PKTSIZE);
838 memcpy_toio(priv->base + baddr, skb->data, skb->len);
839
d7fbeba6 840 /* copy filler into RAM - in case we're filling up...
1da177e4 841 we're filling a bit more than necessary, but that doesn't harm
d7fbeba6 842 since the buffer is far larger...
1da177e4
LT		 843 Sorry Linus for the filler string but I couldn't resist ;-) */
844
845 if (tmplen > skb->len) {
846 char *fill = "NetBSD is a nice OS too! ";
847 unsigned int destoffs = skb->len, l = strlen(fill);
848
849 while (destoffs < tmplen) {
850 memcpy_toio(priv->base + baddr + destoffs, fill, l);
851 destoffs += l;
852 }
853 }
854
855 /* set up the new frame descriptor */
856 addr = priv->tdastart + (priv->nexttxdescr * sizeof(tda_t));
857 memcpy_fromio(&tda, priv->base + addr, sizeof(tda_t));
858 tda.length = tda.fraglength = tmplen;
859 memcpy_toio(priv->base + addr, &tda, sizeof(tda_t));
860
861 /* if there were no active descriptors, trigger the SONIC */
862 spin_lock_irqsave(&priv->lock, flags);
863
864 priv->txusedcnt++;
865 priv->txused[priv->nexttxdescr] = 1;
866
867 /* are all transmission slots used up ? */
868 if (priv->txusedcnt >= TXBUFCNT)
869 netif_stop_queue(dev);
870
871 if (priv->txusedcnt == 1)
872 StartTx(dev, priv->nexttxdescr);
873 priv->nexttxdescr = (priv->nexttxdescr + 1) % TXBUFCNT;
874
875 spin_unlock_irqrestore(&priv->lock, flags);
876tx_done:
877 dev_kfree_skb(skb);
878 return retval;
879}
880
1da177e4
LT		 881/* switch receiver mode. */
882
883static void ibmlana_set_multicast_list(struct net_device *dev)
884{
885 /* first stop the SONIC... */
886 StopSONIC(dev);
887 /* ...then reinit it with the new flags */
888 InitBoard(dev);
889}
890
891/* ------------------------------------------------------------------------
892 * hardware check
893 * ------------------------------------------------------------------------ */
894
fbe02d6d
JG		 895static int ibmlana_irq;
896static int ibmlana_io;
1da177e4
LT		 897static int startslot; /* counts through slots when probing multiple devices */
898
3df5920c
JG		 899static short ibmlana_adapter_ids[] __initdata = {
900 IBM_LANA_ID,
901 0x0000
902};
903
976006f1 904static char *ibmlana_adapter_names[] __devinitdata = {
3df5920c
JG		 905 "IBM LAN Adapter/A",
906 NULL
907};
908
909static int ibmlana_init_one(struct device *kdev)
1da177e4 910{
3df5920c 911 struct mca_device *mdev = to_mca_device(kdev);
fbe02d6d 912 struct net_device *dev;
3df5920c 913 int slot = mdev->slot, z, rc;
1da177e4
LT		 914 int base = 0, irq = 0, iobase = 0, memlen = 0;
915 ibmlana_priv *priv;
916 ibmlana_medium medium;
0795af57 917 DECLARE_MAC_BUF(mac);
1da177e4 918
fbe02d6d
JG		 919 dev = alloc_etherdev(sizeof(ibmlana_priv));
920 if (!dev)
921 return -ENOMEM;
922
923 dev->irq = ibmlana_irq;
924 dev->base_addr = ibmlana_io;
925
1da177e4
LT		 926 base = dev->mem_start;
927 irq = dev->irq;
928
3df5920c
JG		 929 /* deduce card addresses */
930 getaddrs(mdev, &base, &memlen, &iobase, &irq, &medium);
1da177e4 931
3df5920c
JG		 932 /* were we looking for something different ? */
933 if (dev->irq && dev->irq != irq) {
934 rc = -ENODEV;
935 goto err_out;
936 }
937 if (dev->mem_start && dev->mem_start != base) {
938 rc = -ENODEV;
fbe02d6d
JG		 939 goto err_out;
940 }
1da177e4
LT		 941
942 /* announce success */
943 printk(KERN_INFO "%s: IBM LAN Adapter/A found in slot %d\n", dev->name, slot + 1);
944
945 /* try to obtain I/O range */
946 if (!request_region(iobase, IBM_LANA_IORANGE, DRV_NAME)) {
947 printk(KERN_ERR "%s: cannot allocate I/O range at %#x!\n", DRV_NAME, iobase);
948 startslot = slot + 1;
fbe02d6d
JG		 949 rc = -EBUSY;
950 goto err_out;
1da177e4
LT		 951 }
952
953 priv = netdev_priv(dev);
954 priv->slot = slot;
3df5920c 955 priv->realirq = mca_device_transform_irq(mdev, irq);
1da177e4
LT		 956 priv->medium = medium;
957 spin_lock_init(&priv->lock);
d7fbeba6 958
1da177e4
LT		 959 /* set base + irq for this device (irq not allocated so far) */
960
961 dev->irq = 0;
962 dev->mem_start = base;
963 dev->mem_end = base + memlen;
964 dev->base_addr = iobase;
965
966 priv->base = ioremap(base, memlen);
967 if (!priv->base) {
968 printk(KERN_ERR "%s: cannot remap memory!\n", DRV_NAME);
969 startslot = slot + 1;
fbe02d6d
JG		 970 rc = -EBUSY;
971 goto err_out_reg;
1da177e4
LT		 972 }
973
3df5920c
JG		 974 mca_device_set_name(mdev, ibmlana_adapter_names[mdev->index]);
975 mca_device_set_claim(mdev, 1);
1da177e4
LT		 976
977 /* set methods */
978
979 dev->open = ibmlana_open;
980 dev->stop = ibmlana_close;
981 dev->hard_start_xmit = ibmlana_tx;
1da177e4
LT		 982 dev->set_multicast_list = ibmlana_set_multicast_list;
983 dev->flags |= IFF_MULTICAST;
984
985 /* copy out MAC address */
986
987 for (z = 0; z < sizeof(dev->dev_addr); z++)
988 dev->dev_addr[z] = inb(dev->base_addr + MACADDRPROM + z);
989
990 /* print config */
991
992 printk(KERN_INFO "%s: IRQ %d, I/O %#lx, memory %#lx-%#lx, "
0795af57 993 "MAC address %s.\n",
1da177e4
LT		 994 dev->name, priv->realirq, dev->base_addr,
995 dev->mem_start, dev->mem_end - 1,
0795af57 996 print_mac(mac, dev->dev_addr));
1da177e4
LT		 997 printk(KERN_INFO "%s: %s medium\n", dev->name, MediaNames[priv->medium]);
998
999 /* reset board */
1000
1001 ResetBoard(dev);
1002
1003 /* next probe will start at next slot */
1004
1005 startslot = slot + 1;
1006
fbe02d6d
JG		 1007 rc = register_netdev(dev);
1008 if (rc)
1009 goto err_out_claimed;
1010
3df5920c 1011 dev_set_drvdata(kdev, dev);
1da177e4 1012 return 0;
fbe02d6d
JG		 1013
1014err_out_claimed:
3df5920c 1015 mca_device_set_claim(mdev, 0);
fbe02d6d
JG		 1016 iounmap(priv->base);
1017err_out_reg:
1018 release_region(iobase, IBM_LANA_IORANGE);
1019err_out:
1020 free_netdev(dev);
1021 return rc;
1022}
1023
3df5920c 1024static int ibmlana_remove_one(struct device *kdev)
fbe02d6d 1025{
3df5920c
JG		 1026 struct mca_device *mdev = to_mca_device(kdev);
1027 struct net_device *dev = dev_get_drvdata(kdev);
fbe02d6d
JG		 1028 ibmlana_priv *priv = netdev_priv(dev);
1029
1030 unregister_netdev(dev);
1031 /*DeinitBoard(dev); */
1032 release_region(dev->base_addr, IBM_LANA_IORANGE);
3df5920c 1033 mca_device_set_claim(mdev, 0);
fbe02d6d
JG		 1034 iounmap(priv->base);
1035 free_netdev(dev);
3df5920c 1036 return 0;
1da177e4
LT		 1037}
1038
1039/* ------------------------------------------------------------------------
1040 * modularization support
1041 * ------------------------------------------------------------------------ */
1042
fbe02d6d
JG		 1043module_param_named(irq, ibmlana_irq, int, 0);
1044module_param_named(io, ibmlana_io, int, 0);
1da177e4
LT		 1045MODULE_PARM_DESC(irq, "IBM LAN/A IRQ number");
1046MODULE_PARM_DESC(io, "IBM LAN/A I/O base address");
1047MODULE_LICENSE("GPL");
1048
3df5920c
JG		 1049static struct mca_driver ibmlana_driver = {
1050 .id_table = ibmlana_adapter_ids,
1051 .driver = {
1052 .name = "ibmlana",
1053 .bus = &mca_bus_type,
1054 .probe = ibmlana_init_one,
1055 .remove = ibmlana_remove_one,
1056 },
1057};
1058
fbe02d6d 1059static int __init ibmlana_init_module(void)
1da177e4 1060{
3df5920c 1061 return mca_register_driver(&ibmlana_driver);
1da177e4
LT		 1062}
1063
fbe02d6d 1064static void __exit ibmlana_cleanup_module(void)
1da177e4 1065{
3df5920c 1066 mca_unregister_driver(&ibmlana_driver);
1da177e4 1067}
fbe02d6d
JG		 1068
1069module_init(ibmlana_init_module);
1070module_exit(ibmlana_cleanup_module);
Linux 6.x block layer and io_uring tree(s)