1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
4 * All rights reserved. www.lanmedia.com
5 * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
6 *
7 * This code is written by:
8 * Andrew Stanley-Jones (asj@cban.com)
9 * Rob Braun (bbraun@vix.com),
10 * Michael Graff (explorer@vix.com) and
11 * Matt Thomas (matt@3am-software.com).
12 *
13 * With Help By:
14 * David Boggs
15 * Ron Crane
16 * Alan Cox
17 *
18 * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
19 *
20 * To control link specific options lmcctl is required.
21 * It can be obtained from ftp.lanmedia.com.
22 *
23 * Linux driver notes:
24 * Linux uses the device struct lmc_private to pass private information
25 * around.
26 *
27 * The initialization portion of this driver (the lmc_reset() and the
28 * lmc_dec_reset() functions, as well as the led controls and the
29 * lmc_initcsrs() functions.
30 *
31 * The watchdog function runs every second and checks to see if
32 * we still have link, and that the timing source is what we expected
33 * it to be. If link is lost, the interface is marked down, and
34 * we no longer can transmit.
35 */
36
37 #include <linux/kernel.h>
38 #include <linux/module.h>
39 #include <linux/string.h>
40 #include <linux/timer.h>
41 #include <linux/ptrace.h>
42 #include <linux/errno.h>
43 #include <linux/ioport.h>
44 #include <linux/slab.h>
45 #include <linux/interrupt.h>
46 #include <linux/pci.h>
47 #include <linux/delay.h>
48 #include <linux/hdlc.h>
49 #include <linux/in.h>
50 #include <linux/if_arp.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/skbuff.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
56 #include <asm/processor.h> /* Processor type for cache alignment. */
57 #include <asm/io.h>
58 #include <asm/dma.h>
59 #include <linux/uaccess.h>
60 //#include <asm/spinlock.h>
61
62 #define DRIVER_MAJOR_VERSION 1
63 #define DRIVER_MINOR_VERSION 34
64 #define DRIVER_SUB_VERSION 0
65
66 #define DRIVER_VERSION ((DRIVER_MAJOR_VERSION << 8) + DRIVER_MINOR_VERSION)
67
68 #include "lmc.h"
69 #include "lmc_var.h"
70 #include "lmc_ioctl.h"
71 #include "lmc_debug.h"
72 #include "lmc_proto.h"
73
74 static int LMC_PKT_BUF_SZ = 1542;
75
76 static const struct pci_device_id lmc_pci_tbl[] = {
77 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
78 PCI_VENDOR_ID_LMC, PCI_ANY_ID },
79 { PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
80 PCI_ANY_ID, PCI_VENDOR_ID_LMC },
81 { 0 }
82 };
83
84 MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
85 MODULE_LICENSE("GPL v2");
86
87
88 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
89 struct net_device *dev);
90 static int lmc_rx (struct net_device *dev);
91 static int lmc_open(struct net_device *dev);
92 static int lmc_close(struct net_device *dev);
93 static struct net_device_stats *lmc_get_stats(struct net_device *dev);
94 static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
95 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
96 static void lmc_softreset(lmc_softc_t * const);
97 static void lmc_running_reset(struct net_device *dev);
98 static int lmc_ifdown(struct net_device * const);
99 static void lmc_watchdog(struct timer_list *t);
100 static void lmc_reset(lmc_softc_t * const sc);
101 static void lmc_dec_reset(lmc_softc_t * const sc);
102 static void lmc_driver_timeout(struct net_device *dev);
103
104 /*
105 * linux reserves 16 device specific IOCTLs. We call them
106 * LMCIOC* to control various bits of our world.
107 */
lmc_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)108 int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
109 {
110 lmc_softc_t *sc = dev_to_sc(dev);
111 lmc_ctl_t ctl;
112 int ret = -EOPNOTSUPP;
113 u16 regVal;
114 unsigned long flags;
115
116 lmc_trace(dev, "lmc_ioctl in");
117
118 /*
119 * Most functions mess with the structure
120 * Disable interrupts while we do the polling
121 */
122
123 switch (cmd) {
124 /*
125 * Return current driver state. Since we keep this up
126 * To date internally, just copy this out to the user.
127 */
128 case LMCIOCGINFO: /*fold01*/
129 if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
130 ret = -EFAULT;
131 else
132 ret = 0;
133 break;
134
135 case LMCIOCSINFO: /*fold01*/
136 if (!capable(CAP_NET_ADMIN)) {
137 ret = -EPERM;
138 break;
139 }
140
141 if(dev->flags & IFF_UP){
142 ret = -EBUSY;
143 break;
144 }
145
146 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
147 ret = -EFAULT;
148 break;
149 }
150
151 spin_lock_irqsave(&sc->lmc_lock, flags);
152 sc->lmc_media->set_status (sc, &ctl);
153
154 if(ctl.crc_length != sc->ictl.crc_length) {
155 sc->lmc_media->set_crc_length(sc, ctl.crc_length);
156 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
157 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
158 else
159 sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
160 }
161 spin_unlock_irqrestore(&sc->lmc_lock, flags);
162
163 ret = 0;
164 break;
165
166 case LMCIOCIFTYPE: /*fold01*/
167 {
168 u16 old_type = sc->if_type;
169 u16 new_type;
170
171 if (!capable(CAP_NET_ADMIN)) {
172 ret = -EPERM;
173 break;
174 }
175
176 if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
177 ret = -EFAULT;
178 break;
179 }
180
181
182 if (new_type == old_type)
183 {
184 ret = 0 ;
185 break; /* no change */
186 }
187
188 spin_lock_irqsave(&sc->lmc_lock, flags);
189 lmc_proto_close(sc);
190
191 sc->if_type = new_type;
192 lmc_proto_attach(sc);
193 ret = lmc_proto_open(sc);
194 spin_unlock_irqrestore(&sc->lmc_lock, flags);
195 break;
196 }
197
198 case LMCIOCGETXINFO: /*fold01*/
199 spin_lock_irqsave(&sc->lmc_lock, flags);
200 sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
201
202 sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
203 sc->lmc_xinfo.PciSlotNumber = 0;
204 sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
205 sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
206 sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
207 sc->lmc_xinfo.XilinxRevisionNumber =
208 lmc_mii_readreg (sc, 0, 3) & 0xf;
209 sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
210 sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
211 sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
212 spin_unlock_irqrestore(&sc->lmc_lock, flags);
213
214 sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
215
216 if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
217 sizeof(struct lmc_xinfo)))
218 ret = -EFAULT;
219 else
220 ret = 0;
221
222 break;
223
224 case LMCIOCGETLMCSTATS:
225 spin_lock_irqsave(&sc->lmc_lock, flags);
226 if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
227 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
228 sc->extra_stats.framingBitErrorCount +=
229 lmc_mii_readreg(sc, 0, 18) & 0xff;
230 lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
231 sc->extra_stats.framingBitErrorCount +=
232 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
233 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
234 sc->extra_stats.lineCodeViolationCount +=
235 lmc_mii_readreg(sc, 0, 18) & 0xff;
236 lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
237 sc->extra_stats.lineCodeViolationCount +=
238 (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
239 lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
240 regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
241
242 sc->extra_stats.lossOfFrameCount +=
243 (regVal & T1FRAMER_LOF_MASK) >> 4;
244 sc->extra_stats.changeOfFrameAlignmentCount +=
245 (regVal & T1FRAMER_COFA_MASK) >> 2;
246 sc->extra_stats.severelyErroredFrameCount +=
247 regVal & T1FRAMER_SEF_MASK;
248 }
249 spin_unlock_irqrestore(&sc->lmc_lock, flags);
250 if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
251 sizeof(sc->lmc_device->stats)) ||
252 copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
253 &sc->extra_stats, sizeof(sc->extra_stats)))
254 ret = -EFAULT;
255 else
256 ret = 0;
257 break;
258
259 case LMCIOCCLEARLMCSTATS:
260 if (!capable(CAP_NET_ADMIN)) {
261 ret = -EPERM;
262 break;
263 }
264
265 spin_lock_irqsave(&sc->lmc_lock, flags);
266 memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
267 memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
268 sc->extra_stats.check = STATCHECK;
269 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
270 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
271 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
272 spin_unlock_irqrestore(&sc->lmc_lock, flags);
273 ret = 0;
274 break;
275
276 case LMCIOCSETCIRCUIT: /*fold01*/
277 if (!capable(CAP_NET_ADMIN)){
278 ret = -EPERM;
279 break;
280 }
281
282 if(dev->flags & IFF_UP){
283 ret = -EBUSY;
284 break;
285 }
286
287 if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
288 ret = -EFAULT;
289 break;
290 }
291 spin_lock_irqsave(&sc->lmc_lock, flags);
292 sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
293 sc->ictl.circuit_type = ctl.circuit_type;
294 spin_unlock_irqrestore(&sc->lmc_lock, flags);
295 ret = 0;
296
297 break;
298
299 case LMCIOCRESET: /*fold01*/
300 if (!capable(CAP_NET_ADMIN)){
301 ret = -EPERM;
302 break;
303 }
304
305 spin_lock_irqsave(&sc->lmc_lock, flags);
306 /* Reset driver and bring back to current state */
307 printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
308 lmc_running_reset (dev);
309 printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
310
311 LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
312 spin_unlock_irqrestore(&sc->lmc_lock, flags);
313
314 ret = 0;
315 break;
316
317 #ifdef DEBUG
318 case LMCIOCDUMPEVENTLOG:
319 if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
320 ret = -EFAULT;
321 break;
322 }
323 if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
324 sizeof(lmcEventLogBuf)))
325 ret = -EFAULT;
326 else
327 ret = 0;
328
329 break;
330 #endif /* end ifdef _DBG_EVENTLOG */
331 case LMCIOCT1CONTROL: /*fold01*/
332 if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
333 ret = -EOPNOTSUPP;
334 break;
335 }
336 break;
337 case LMCIOCXILINX: /*fold01*/
338 {
339 struct lmc_xilinx_control xc; /*fold02*/
340
341 if (!capable(CAP_NET_ADMIN)){
342 ret = -EPERM;
343 break;
344 }
345
346 /*
347 * Stop the xwitter whlie we restart the hardware
348 */
349 netif_stop_queue(dev);
350
351 if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
352 ret = -EFAULT;
353 break;
354 }
355 switch(xc.command){
356 case lmc_xilinx_reset: /*fold02*/
357 {
358 u16 mii;
359 spin_lock_irqsave(&sc->lmc_lock, flags);
360 mii = lmc_mii_readreg (sc, 0, 16);
361
362 /*
363 * Make all of them 0 and make input
364 */
365 lmc_gpio_mkinput(sc, 0xff);
366
367 /*
368 * make the reset output
369 */
370 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
371
372 /*
373 * RESET low to force configuration. This also forces
374 * the transmitter clock to be internal, but we expect to reset
375 * that later anyway.
376 */
377
378 sc->lmc_gpio &= ~LMC_GEP_RESET;
379 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
380
381
382 /*
383 * hold for more than 10 microseconds
384 */
385 udelay(50);
386
387 sc->lmc_gpio |= LMC_GEP_RESET;
388 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
389
390
391 /*
392 * stop driving Xilinx-related signals
393 */
394 lmc_gpio_mkinput(sc, 0xff);
395
396 /* Reset the frammer hardware */
397 sc->lmc_media->set_link_status (sc, 1);
398 sc->lmc_media->set_status (sc, NULL);
399 // lmc_softreset(sc);
400
401 {
402 int i;
403 for(i = 0; i < 5; i++){
404 lmc_led_on(sc, LMC_DS3_LED0);
405 mdelay(100);
406 lmc_led_off(sc, LMC_DS3_LED0);
407 lmc_led_on(sc, LMC_DS3_LED1);
408 mdelay(100);
409 lmc_led_off(sc, LMC_DS3_LED1);
410 lmc_led_on(sc, LMC_DS3_LED3);
411 mdelay(100);
412 lmc_led_off(sc, LMC_DS3_LED3);
413 lmc_led_on(sc, LMC_DS3_LED2);
414 mdelay(100);
415 lmc_led_off(sc, LMC_DS3_LED2);
416 }
417 }
418 spin_unlock_irqrestore(&sc->lmc_lock, flags);
419
420
421
422 ret = 0x0;
423
424 }
425
426 break;
427 case lmc_xilinx_load_prom: /*fold02*/
428 {
429 u16 mii;
430 int timeout = 500000;
431 spin_lock_irqsave(&sc->lmc_lock, flags);
432 mii = lmc_mii_readreg (sc, 0, 16);
433
434 /*
435 * Make all of them 0 and make input
436 */
437 lmc_gpio_mkinput(sc, 0xff);
438
439 /*
440 * make the reset output
441 */
442 lmc_gpio_mkoutput(sc, LMC_GEP_DP | LMC_GEP_RESET);
443
444 /*
445 * RESET low to force configuration. This also forces
446 * the transmitter clock to be internal, but we expect to reset
447 * that later anyway.
448 */
449
450 sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
451 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
452
453
454 /*
455 * hold for more than 10 microseconds
456 */
457 udelay(50);
458
459 sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
460 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
461
462 /*
463 * busy wait for the chip to reset
464 */
465 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
466 (timeout-- > 0))
467 cpu_relax();
468
469
470 /*
471 * stop driving Xilinx-related signals
472 */
473 lmc_gpio_mkinput(sc, 0xff);
474 spin_unlock_irqrestore(&sc->lmc_lock, flags);
475
476 ret = 0x0;
477
478
479 break;
480
481 }
482
483 case lmc_xilinx_load: /*fold02*/
484 {
485 char *data;
486 int pos;
487 int timeout = 500000;
488
489 if (!xc.data) {
490 ret = -EINVAL;
491 break;
492 }
493
494 data = memdup_user(xc.data, xc.len);
495 if (IS_ERR(data)) {
496 ret = PTR_ERR(data);
497 break;
498 }
499
500 printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
501
502 spin_lock_irqsave(&sc->lmc_lock, flags);
503 lmc_gpio_mkinput(sc, 0xff);
504
505 /*
506 * Clear the Xilinx and start prgramming from the DEC
507 */
508
509 /*
510 * Set ouput as:
511 * Reset: 0 (active)
512 * DP: 0 (active)
513 * Mode: 1
514 *
515 */
516 sc->lmc_gpio = 0x00;
517 sc->lmc_gpio &= ~LMC_GEP_DP;
518 sc->lmc_gpio &= ~LMC_GEP_RESET;
519 sc->lmc_gpio |= LMC_GEP_MODE;
520 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
521
522 lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET);
523
524 /*
525 * Wait at least 10 us 20 to be safe
526 */
527 udelay(50);
528
529 /*
530 * Clear reset and activate programming lines
531 * Reset: Input
532 * DP: Input
533 * Clock: Output
534 * Data: Output
535 * Mode: Output
536 */
537 lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET);
538
539 /*
540 * Set LOAD, DATA, Clock to 1
541 */
542 sc->lmc_gpio = 0x00;
543 sc->lmc_gpio |= LMC_GEP_MODE;
544 sc->lmc_gpio |= LMC_GEP_DATA;
545 sc->lmc_gpio |= LMC_GEP_CLK;
546 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
547
548 lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE );
549
550 /*
551 * busy wait for the chip to reset
552 */
553 while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
554 (timeout-- > 0))
555 cpu_relax();
556
557 printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
558
559 for(pos = 0; pos < xc.len; pos++){
560 switch(data[pos]){
561 case 0:
562 sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */
563 break;
564 case 1:
565 sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */
566 break;
567 default:
568 printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]);
569 sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */
570 }
571 sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */
572 sc->lmc_gpio |= LMC_GEP_MODE;
573 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
574 udelay(1);
575
576 sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */
577 sc->lmc_gpio |= LMC_GEP_MODE;
578 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
579 udelay(1);
580 }
581 if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){
582 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name);
583 }
584 else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){
585 printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name);
586 }
587 else {
588 printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos);
589 }
590
591 lmc_gpio_mkinput(sc, 0xff);
592
593 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
594 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
595
596 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
597 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
598 spin_unlock_irqrestore(&sc->lmc_lock, flags);
599
600 kfree(data);
601
602 ret = 0;
603
604 break;
605 }
606 default: /*fold02*/
607 ret = -EBADE;
608 break;
609 }
610
611 netif_wake_queue(dev);
612 sc->lmc_txfull = 0;
613
614 }
615 break;
616 default: /*fold01*/
617 /* If we don't know what to do, give the protocol a shot. */
618 ret = lmc_proto_ioctl (sc, ifr, cmd);
619 break;
620 }
621
622 lmc_trace(dev, "lmc_ioctl out");
623
624 return ret;
625 }
626
627
628 /* the watchdog process that cruises around */
lmc_watchdog(struct timer_list * t)629 static void lmc_watchdog(struct timer_list *t) /*fold00*/
630 {
631 lmc_softc_t *sc = from_timer(sc, t, timer);
632 struct net_device *dev = sc->lmc_device;
633 int link_status;
634 u32 ticks;
635 unsigned long flags;
636
637 lmc_trace(dev, "lmc_watchdog in");
638
639 spin_lock_irqsave(&sc->lmc_lock, flags);
640
641 if(sc->check != 0xBEAFCAFE){
642 printk("LMC: Corrupt net_device struct, breaking out\n");
643 spin_unlock_irqrestore(&sc->lmc_lock, flags);
644 return;
645 }
646
647
648 /* Make sure the tx jabber and rx watchdog are off,
649 * and the transmit and receive processes are running.
650 */
651
652 LMC_CSR_WRITE (sc, csr_15, 0x00000011);
653 sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
654 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
655
656 if (sc->lmc_ok == 0)
657 goto kick_timer;
658
659 LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
660
661 /* --- begin time out check -----------------------------------
662 * check for a transmit interrupt timeout
663 * Has the packet xmt vs xmt serviced threshold been exceeded */
664 if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
665 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
666 sc->tx_TimeoutInd == 0)
667 {
668
669 /* wait for the watchdog to come around again */
670 sc->tx_TimeoutInd = 1;
671 }
672 else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
673 sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
674 sc->tx_TimeoutInd)
675 {
676
677 LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0);
678
679 sc->tx_TimeoutDisplay = 1;
680 sc->extra_stats.tx_TimeoutCnt++;
681
682 /* DEC chip is stuck, hit it with a RESET!!!! */
683 lmc_running_reset (dev);
684
685
686 /* look at receive & transmit process state to make sure they are running */
687 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
688
689 /* look at: DSR - 02 for Reg 16
690 * CTS - 08
691 * DCD - 10
692 * RI - 20
693 * for Reg 17
694 */
695 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17));
696
697 /* reset the transmit timeout detection flag */
698 sc->tx_TimeoutInd = 0;
699 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
700 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
701 } else {
702 sc->tx_TimeoutInd = 0;
703 sc->lastlmc_taint_tx = sc->lmc_taint_tx;
704 sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
705 }
706
707 /* --- end time out check ----------------------------------- */
708
709
710 link_status = sc->lmc_media->get_link_status (sc);
711
712 /*
713 * hardware level link lost, but the interface is marked as up.
714 * Mark it as down.
715 */
716 if ((link_status == 0) && (sc->last_link_status != 0)) {
717 printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name);
718 sc->last_link_status = 0;
719 /* lmc_reset (sc); Why reset??? The link can go down ok */
720
721 /* Inform the world that link has been lost */
722 netif_carrier_off(dev);
723 }
724
725 /*
726 * hardware link is up, but the interface is marked as down.
727 * Bring it back up again.
728 */
729 if (link_status != 0 && sc->last_link_status == 0) {
730 printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name);
731 sc->last_link_status = 1;
732 /* lmc_reset (sc); Again why reset??? */
733
734 netif_carrier_on(dev);
735 }
736
737 /* Call media specific watchdog functions */
738 sc->lmc_media->watchdog(sc);
739
740 /*
741 * Poke the transmitter to make sure it
742 * never stops, even if we run out of mem
743 */
744 LMC_CSR_WRITE(sc, csr_rxpoll, 0);
745
746 /*
747 * Check for code that failed
748 * and try and fix it as appropriate
749 */
750 if(sc->failed_ring == 1){
751 /*
752 * Failed to setup the recv/xmit rin
753 * Try again
754 */
755 sc->failed_ring = 0;
756 lmc_softreset(sc);
757 }
758 if(sc->failed_recv_alloc == 1){
759 /*
760 * We failed to alloc mem in the
761 * interrupt handler, go through the rings
762 * and rebuild them
763 */
764 sc->failed_recv_alloc = 0;
765 lmc_softreset(sc);
766 }
767
768
769 /*
770 * remember the timer value
771 */
772 kick_timer:
773
774 ticks = LMC_CSR_READ (sc, csr_gp_timer);
775 LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL);
776 sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
777
778 /*
779 * restart this timer.
780 */
781 sc->timer.expires = jiffies + (HZ);
782 add_timer (&sc->timer);
783
784 spin_unlock_irqrestore(&sc->lmc_lock, flags);
785
786 lmc_trace(dev, "lmc_watchdog out");
787
788 }
789
lmc_attach(struct net_device * dev,unsigned short encoding,unsigned short parity)790 static int lmc_attach(struct net_device *dev, unsigned short encoding,
791 unsigned short parity)
792 {
793 if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
794 return 0;
795 return -EINVAL;
796 }
797
798 static const struct net_device_ops lmc_ops = {
799 .ndo_open = lmc_open,
800 .ndo_stop = lmc_close,
801 .ndo_start_xmit = hdlc_start_xmit,
802 .ndo_do_ioctl = lmc_ioctl,
803 .ndo_tx_timeout = lmc_driver_timeout,
804 .ndo_get_stats = lmc_get_stats,
805 };
806
lmc_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)807 static int lmc_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
808 {
809 lmc_softc_t *sc;
810 struct net_device *dev;
811 u16 subdevice;
812 u16 AdapModelNum;
813 int err;
814 static int cards_found;
815
816 /* lmc_trace(dev, "lmc_init_one in"); */
817
818 err = pcim_enable_device(pdev);
819 if (err) {
820 printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
821 return err;
822 }
823
824 err = pci_request_regions(pdev, "lmc");
825 if (err) {
826 printk(KERN_ERR "lmc: pci_request_region failed\n");
827 return err;
828 }
829
830 /*
831 * Allocate our own device structure
832 */
833 sc = devm_kzalloc(&pdev->dev, sizeof(lmc_softc_t), GFP_KERNEL);
834 if (!sc)
835 return -ENOMEM;
836
837 dev = alloc_hdlcdev(sc);
838 if (!dev) {
839 printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
840 return -ENOMEM;
841 }
842
843
844 dev->type = ARPHRD_HDLC;
845 dev_to_hdlc(dev)->xmit = lmc_start_xmit;
846 dev_to_hdlc(dev)->attach = lmc_attach;
847 dev->netdev_ops = &lmc_ops;
848 dev->watchdog_timeo = HZ; /* 1 second */
849 dev->tx_queue_len = 100;
850 sc->lmc_device = dev;
851 sc->name = dev->name;
852 sc->if_type = LMC_PPP;
853 sc->check = 0xBEAFCAFE;
854 dev->base_addr = pci_resource_start(pdev, 0);
855 dev->irq = pdev->irq;
856 pci_set_drvdata(pdev, dev);
857 SET_NETDEV_DEV(dev, &pdev->dev);
858
859 /*
860 * This will get the protocol layer ready and do any 1 time init's
861 * Must have a valid sc and dev structure
862 */
863 lmc_proto_attach(sc);
864
865 /* Init the spin lock so can call it latter */
866
867 spin_lock_init(&sc->lmc_lock);
868 pci_set_master(pdev);
869
870 printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
871 dev->base_addr, dev->irq);
872
873 err = register_hdlc_device(dev);
874 if (err) {
875 printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
876 free_netdev(dev);
877 return err;
878 }
879
880 sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
881 sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
882
883 /*
884 *
885 * Check either the subvendor or the subdevice, some systems reverse
886 * the setting in the bois, seems to be version and arch dependent?
887 * Fix the error, exchange the two values
888 */
889 if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
890 subdevice = pdev->subsystem_vendor;
891
892 switch (subdevice) {
893 case PCI_DEVICE_ID_LMC_HSSI:
894 printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
895 sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
896 sc->lmc_media = &lmc_hssi_media;
897 break;
898 case PCI_DEVICE_ID_LMC_DS3:
899 printk(KERN_INFO "%s: LMC DS3\n", dev->name);
900 sc->lmc_cardtype = LMC_CARDTYPE_DS3;
901 sc->lmc_media = &lmc_ds3_media;
902 break;
903 case PCI_DEVICE_ID_LMC_SSI:
904 printk(KERN_INFO "%s: LMC SSI\n", dev->name);
905 sc->lmc_cardtype = LMC_CARDTYPE_SSI;
906 sc->lmc_media = &lmc_ssi_media;
907 break;
908 case PCI_DEVICE_ID_LMC_T1:
909 printk(KERN_INFO "%s: LMC T1\n", dev->name);
910 sc->lmc_cardtype = LMC_CARDTYPE_T1;
911 sc->lmc_media = &lmc_t1_media;
912 break;
913 default:
914 printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
915 break;
916 }
917
918 lmc_initcsrs (sc, dev->base_addr, 8);
919
920 lmc_gpio_mkinput (sc, 0xff);
921 sc->lmc_gpio = 0; /* drive no signals yet */
922
923 sc->lmc_media->defaults (sc);
924
925 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
926
927 /* verify that the PCI Sub System ID matches the Adapter Model number
928 * from the MII register
929 */
930 AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
931
932 if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
933 subdevice != PCI_DEVICE_ID_LMC_T1) &&
934 (AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
935 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
936 (AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
937 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
938 (AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
939 subdevice != PCI_DEVICE_ID_LMC_HSSI))
940 printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
941 " Subsystem ID = 0x%04x\n",
942 dev->name, AdapModelNum, subdevice);
943
944 /*
945 * reset clock
946 */
947 LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
948
949 sc->board_idx = cards_found++;
950 sc->extra_stats.check = STATCHECK;
951 sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
952 sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
953 sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
954
955 sc->lmc_ok = 0;
956 sc->last_link_status = 0;
957
958 lmc_trace(dev, "lmc_init_one out");
959 return 0;
960 }
961
962 /*
963 * Called from pci when removing module.
964 */
lmc_remove_one(struct pci_dev * pdev)965 static void lmc_remove_one(struct pci_dev *pdev)
966 {
967 struct net_device *dev = pci_get_drvdata(pdev);
968
969 if (dev) {
970 printk(KERN_DEBUG "%s: removing...\n", dev->name);
971 unregister_hdlc_device(dev);
972 free_netdev(dev);
973 }
974 }
975
976 /* After this is called, packets can be sent.
977 * Does not initialize the addresses
978 */
lmc_open(struct net_device * dev)979 static int lmc_open(struct net_device *dev)
980 {
981 lmc_softc_t *sc = dev_to_sc(dev);
982 int err;
983
984 lmc_trace(dev, "lmc_open in");
985
986 lmc_led_on(sc, LMC_DS3_LED0);
987
988 lmc_dec_reset(sc);
989 lmc_reset(sc);
990
991 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
992 LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
993 lmc_mii_readreg(sc, 0, 17));
994
995 if (sc->lmc_ok){
996 lmc_trace(dev, "lmc_open lmc_ok out");
997 return 0;
998 }
999
1000 lmc_softreset (sc);
1001
1002 /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1003 if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1004 printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1005 lmc_trace(dev, "lmc_open irq failed out");
1006 return -EAGAIN;
1007 }
1008 sc->got_irq = 1;
1009
1010 /* Assert Terminal Active */
1011 sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1012 sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1013
1014 /*
1015 * reset to last state.
1016 */
1017 sc->lmc_media->set_status (sc, NULL);
1018
1019 /* setup default bits to be used in tulip_desc_t transmit descriptor
1020 * -baz */
1021 sc->TxDescriptControlInit = (
1022 LMC_TDES_INTERRUPT_ON_COMPLETION
1023 | LMC_TDES_FIRST_SEGMENT
1024 | LMC_TDES_LAST_SEGMENT
1025 | LMC_TDES_SECOND_ADDR_CHAINED
1026 | LMC_TDES_DISABLE_PADDING
1027 );
1028
1029 if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1030 /* disable 32 bit CRC generated by ASIC */
1031 sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1032 }
1033 sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1034 /* Acknoledge the Terminal Active and light LEDs */
1035
1036 /* dev->flags |= IFF_UP; */
1037
1038 if ((err = lmc_proto_open(sc)) != 0)
1039 return err;
1040
1041 netif_start_queue(dev);
1042 sc->extra_stats.tx_tbusy0++;
1043
1044 /*
1045 * select what interrupts we want to get
1046 */
1047 sc->lmc_intrmask = 0;
1048 /* Should be using the default interrupt mask defined in the .h file. */
1049 sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1050 | TULIP_STS_RXINTR
1051 | TULIP_STS_TXINTR
1052 | TULIP_STS_ABNRMLINTR
1053 | TULIP_STS_SYSERROR
1054 | TULIP_STS_TXSTOPPED
1055 | TULIP_STS_TXUNDERFLOW
1056 | TULIP_STS_RXSTOPPED
1057 | TULIP_STS_RXNOBUF
1058 );
1059 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1060
1061 sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1062 sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1063 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1064
1065 sc->lmc_ok = 1; /* Run watchdog */
1066
1067 /*
1068 * Set the if up now - pfb
1069 */
1070
1071 sc->last_link_status = 1;
1072
1073 /*
1074 * Setup a timer for the watchdog on probe, and start it running.
1075 * Since lmc_ok == 0, it will be a NOP for now.
1076 */
1077 timer_setup(&sc->timer, lmc_watchdog, 0);
1078 sc->timer.expires = jiffies + HZ;
1079 add_timer (&sc->timer);
1080
1081 lmc_trace(dev, "lmc_open out");
1082
1083 return 0;
1084 }
1085
1086 /* Total reset to compensate for the AdTran DSU doing bad things
1087 * under heavy load
1088 */
1089
lmc_running_reset(struct net_device * dev)1090 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1091 {
1092 lmc_softc_t *sc = dev_to_sc(dev);
1093
1094 lmc_trace(dev, "lmc_running_reset in");
1095
1096 /* stop interrupts */
1097 /* Clear the interrupt mask */
1098 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1099
1100 lmc_dec_reset (sc);
1101 lmc_reset (sc);
1102 lmc_softreset (sc);
1103 /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1104 sc->lmc_media->set_link_status (sc, 1);
1105 sc->lmc_media->set_status (sc, NULL);
1106
1107 netif_wake_queue(dev);
1108
1109 sc->lmc_txfull = 0;
1110 sc->extra_stats.tx_tbusy0++;
1111
1112 sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1113 LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1114
1115 sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1116 LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1117
1118 lmc_trace(dev, "lmc_running_reset_out");
1119 }
1120
1121
1122 /* This is what is called when you ifconfig down a device.
1123 * This disables the timer for the watchdog and keepalives,
1124 * and disables the irq for dev.
1125 */
lmc_close(struct net_device * dev)1126 static int lmc_close(struct net_device *dev)
1127 {
1128 /* not calling release_region() as we should */
1129 lmc_softc_t *sc = dev_to_sc(dev);
1130
1131 lmc_trace(dev, "lmc_close in");
1132
1133 sc->lmc_ok = 0;
1134 sc->lmc_media->set_link_status (sc, 0);
1135 del_timer (&sc->timer);
1136 lmc_proto_close(sc);
1137 lmc_ifdown (dev);
1138
1139 lmc_trace(dev, "lmc_close out");
1140
1141 return 0;
1142 }
1143
1144 /* Ends the transfer of packets */
1145 /* When the interface goes down, this is called */
lmc_ifdown(struct net_device * dev)1146 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1147 {
1148 lmc_softc_t *sc = dev_to_sc(dev);
1149 u32 csr6;
1150 int i;
1151
1152 lmc_trace(dev, "lmc_ifdown in");
1153
1154 /* Don't let anything else go on right now */
1155 // dev->start = 0;
1156 netif_stop_queue(dev);
1157 sc->extra_stats.tx_tbusy1++;
1158
1159 /* stop interrupts */
1160 /* Clear the interrupt mask */
1161 LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1162
1163 /* Stop Tx and Rx on the chip */
1164 csr6 = LMC_CSR_READ (sc, csr_command);
1165 csr6 &= ~LMC_DEC_ST; /* Turn off the Transmission bit */
1166 csr6 &= ~LMC_DEC_SR; /* Turn off the Receive bit */
1167 LMC_CSR_WRITE (sc, csr_command, csr6);
1168
1169 sc->lmc_device->stats.rx_missed_errors +=
1170 LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1171
1172 /* release the interrupt */
1173 if(sc->got_irq == 1){
1174 free_irq (dev->irq, dev);
1175 sc->got_irq = 0;
1176 }
1177
1178 /* free skbuffs in the Rx queue */
1179 for (i = 0; i < LMC_RXDESCS; i++)
1180 {
1181 struct sk_buff *skb = sc->lmc_rxq[i];
1182 sc->lmc_rxq[i] = NULL;
1183 sc->lmc_rxring[i].status = 0;
1184 sc->lmc_rxring[i].length = 0;
1185 sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1186 if (skb != NULL)
1187 dev_kfree_skb(skb);
1188 sc->lmc_rxq[i] = NULL;
1189 }
1190
1191 for (i = 0; i < LMC_TXDESCS; i++)
1192 {
1193 if (sc->lmc_txq[i] != NULL)
1194 dev_kfree_skb(sc->lmc_txq[i]);
1195 sc->lmc_txq[i] = NULL;
1196 }
1197
1198 lmc_led_off (sc, LMC_MII16_LED_ALL);
1199
1200 netif_wake_queue(dev);
1201 sc->extra_stats.tx_tbusy0++;
1202
1203 lmc_trace(dev, "lmc_ifdown out");
1204
1205 return 0;
1206 }
1207
1208 /* Interrupt handling routine. This will take an incoming packet, or clean
1209 * up after a trasmit.
1210 */
lmc_interrupt(int irq,void * dev_instance)1211 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1212 {
1213 struct net_device *dev = (struct net_device *) dev_instance;
1214 lmc_softc_t *sc = dev_to_sc(dev);
1215 u32 csr;
1216 int i;
1217 s32 stat;
1218 unsigned int badtx;
1219 u32 firstcsr;
1220 int max_work = LMC_RXDESCS;
1221 int handled = 0;
1222
1223 lmc_trace(dev, "lmc_interrupt in");
1224
1225 spin_lock(&sc->lmc_lock);
1226
1227 /*
1228 * Read the csr to find what interrupts we have (if any)
1229 */
1230 csr = LMC_CSR_READ (sc, csr_status);
1231
1232 /*
1233 * Make sure this is our interrupt
1234 */
1235 if ( ! (csr & sc->lmc_intrmask)) {
1236 goto lmc_int_fail_out;
1237 }
1238
1239 firstcsr = csr;
1240
1241 /* always go through this loop at least once */
1242 while (csr & sc->lmc_intrmask) {
1243 handled = 1;
1244
1245 /*
1246 * Clear interrupt bits, we handle all case below
1247 */
1248 LMC_CSR_WRITE (sc, csr_status, csr);
1249
1250 /*
1251 * One of
1252 * - Transmit process timed out CSR5<1>
1253 * - Transmit jabber timeout CSR5<3>
1254 * - Transmit underflow CSR5<5>
1255 * - Transmit Receiver buffer unavailable CSR5<7>
1256 * - Receive process stopped CSR5<8>
1257 * - Receive watchdog timeout CSR5<9>
1258 * - Early transmit interrupt CSR5<10>
1259 *
1260 * Is this really right? Should we do a running reset for jabber?
1261 * (being a WAN card and all)
1262 */
1263 if (csr & TULIP_STS_ABNRMLINTR){
1264 lmc_running_reset (dev);
1265 break;
1266 }
1267
1268 if (csr & TULIP_STS_RXINTR){
1269 lmc_trace(dev, "rx interrupt");
1270 lmc_rx (dev);
1271
1272 }
1273 if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1274
1275 int n_compl = 0 ;
1276 /* reset the transmit timeout detection flag -baz */
1277 sc->extra_stats.tx_NoCompleteCnt = 0;
1278
1279 badtx = sc->lmc_taint_tx;
1280 i = badtx % LMC_TXDESCS;
1281
1282 while ((badtx < sc->lmc_next_tx)) {
1283 stat = sc->lmc_txring[i].status;
1284
1285 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1286 sc->lmc_txring[i].length);
1287 /*
1288 * If bit 31 is 1 the tulip owns it break out of the loop
1289 */
1290 if (stat & 0x80000000)
1291 break;
1292
1293 n_compl++ ; /* i.e., have an empty slot in ring */
1294 /*
1295 * If we have no skbuff or have cleared it
1296 * Already continue to the next buffer
1297 */
1298 if (sc->lmc_txq[i] == NULL)
1299 continue;
1300
1301 /*
1302 * Check the total error summary to look for any errors
1303 */
1304 if (stat & 0x8000) {
1305 sc->lmc_device->stats.tx_errors++;
1306 if (stat & 0x4104)
1307 sc->lmc_device->stats.tx_aborted_errors++;
1308 if (stat & 0x0C00)
1309 sc->lmc_device->stats.tx_carrier_errors++;
1310 if (stat & 0x0200)
1311 sc->lmc_device->stats.tx_window_errors++;
1312 if (stat & 0x0002)
1313 sc->lmc_device->stats.tx_fifo_errors++;
1314 } else {
1315 sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1316
1317 sc->lmc_device->stats.tx_packets++;
1318 }
1319
1320 dev_consume_skb_irq(sc->lmc_txq[i]);
1321 sc->lmc_txq[i] = NULL;
1322
1323 badtx++;
1324 i = badtx % LMC_TXDESCS;
1325 }
1326
1327 if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1328 {
1329 printk ("%s: out of sync pointer\n", dev->name);
1330 badtx += LMC_TXDESCS;
1331 }
1332 LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1333 sc->lmc_txfull = 0;
1334 netif_wake_queue(dev);
1335 sc->extra_stats.tx_tbusy0++;
1336
1337
1338 #ifdef DEBUG
1339 sc->extra_stats.dirtyTx = badtx;
1340 sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1341 sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1342 #endif
1343 sc->lmc_taint_tx = badtx;
1344
1345 /*
1346 * Why was there a break here???
1347 */
1348 } /* end handle transmit interrupt */
1349
1350 if (csr & TULIP_STS_SYSERROR) {
1351 u32 error;
1352 printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1353 error = csr>>23 & 0x7;
1354 switch(error){
1355 case 0x000:
1356 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1357 break;
1358 case 0x001:
1359 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1360 break;
1361 case 0x002:
1362 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1363 break;
1364 default:
1365 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1366 }
1367 lmc_dec_reset (sc);
1368 lmc_reset (sc);
1369 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1370 LMC_EVENT_LOG(LMC_EVENT_RESET2,
1371 lmc_mii_readreg (sc, 0, 16),
1372 lmc_mii_readreg (sc, 0, 17));
1373
1374 }
1375
1376
1377 if(max_work-- <= 0)
1378 break;
1379
1380 /*
1381 * Get current csr status to make sure
1382 * we've cleared all interrupts
1383 */
1384 csr = LMC_CSR_READ (sc, csr_status);
1385 } /* end interrupt loop */
1386 LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1387
1388 lmc_int_fail_out:
1389
1390 spin_unlock(&sc->lmc_lock);
1391
1392 lmc_trace(dev, "lmc_interrupt out");
1393 return IRQ_RETVAL(handled);
1394 }
1395
lmc_start_xmit(struct sk_buff * skb,struct net_device * dev)1396 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1397 struct net_device *dev)
1398 {
1399 lmc_softc_t *sc = dev_to_sc(dev);
1400 u32 flag;
1401 int entry;
1402 unsigned long flags;
1403
1404 lmc_trace(dev, "lmc_start_xmit in");
1405
1406 spin_lock_irqsave(&sc->lmc_lock, flags);
1407
1408 /* normal path, tbusy known to be zero */
1409
1410 entry = sc->lmc_next_tx % LMC_TXDESCS;
1411
1412 sc->lmc_txq[entry] = skb;
1413 sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1414
1415 LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1416
1417 #ifndef GCOM
1418 /* If the queue is less than half full, don't interrupt */
1419 if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1420 {
1421 /* Do not interrupt on completion of this packet */
1422 flag = 0x60000000;
1423 netif_wake_queue(dev);
1424 }
1425 else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1426 {
1427 /* This generates an interrupt on completion of this packet */
1428 flag = 0xe0000000;
1429 netif_wake_queue(dev);
1430 }
1431 else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1432 {
1433 /* Do not interrupt on completion of this packet */
1434 flag = 0x60000000;
1435 netif_wake_queue(dev);
1436 }
1437 else
1438 {
1439 /* This generates an interrupt on completion of this packet */
1440 flag = 0xe0000000;
1441 sc->lmc_txfull = 1;
1442 netif_stop_queue(dev);
1443 }
1444 #else
1445 flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1446
1447 if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1448 { /* ring full, go busy */
1449 sc->lmc_txfull = 1;
1450 netif_stop_queue(dev);
1451 sc->extra_stats.tx_tbusy1++;
1452 LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1453 }
1454 #endif
1455
1456
1457 if (entry == LMC_TXDESCS - 1) /* last descriptor in ring */
1458 flag |= LMC_TDES_END_OF_RING; /* flag as such for Tulip */
1459
1460 /* don't pad small packets either */
1461 flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1462 sc->TxDescriptControlInit;
1463
1464 /* set the transmit timeout flag to be checked in
1465 * the watchdog timer handler. -baz
1466 */
1467
1468 sc->extra_stats.tx_NoCompleteCnt++;
1469 sc->lmc_next_tx++;
1470
1471 /* give ownership to the chip */
1472 LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1473 sc->lmc_txring[entry].status = 0x80000000;
1474
1475 /* send now! */
1476 LMC_CSR_WRITE (sc, csr_txpoll, 0);
1477
1478 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1479
1480 lmc_trace(dev, "lmc_start_xmit_out");
1481 return NETDEV_TX_OK;
1482 }
1483
1484
lmc_rx(struct net_device * dev)1485 static int lmc_rx(struct net_device *dev)
1486 {
1487 lmc_softc_t *sc = dev_to_sc(dev);
1488 int i;
1489 int rx_work_limit = LMC_RXDESCS;
1490 int rxIntLoopCnt; /* debug -baz */
1491 int localLengthErrCnt = 0;
1492 long stat;
1493 struct sk_buff *skb, *nsb;
1494 u16 len;
1495
1496 lmc_trace(dev, "lmc_rx in");
1497
1498 lmc_led_on(sc, LMC_DS3_LED3);
1499
1500 rxIntLoopCnt = 0; /* debug -baz */
1501
1502 i = sc->lmc_next_rx % LMC_RXDESCS;
1503
1504 while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1505 {
1506 rxIntLoopCnt++; /* debug -baz */
1507 len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1508 if ((stat & 0x0300) != 0x0300) { /* Check first segment and last segment */
1509 if ((stat & 0x0000ffff) != 0x7fff) {
1510 /* Oversized frame */
1511 sc->lmc_device->stats.rx_length_errors++;
1512 goto skip_packet;
1513 }
1514 }
1515
1516 if (stat & 0x00000008) { /* Catch a dribbling bit error */
1517 sc->lmc_device->stats.rx_errors++;
1518 sc->lmc_device->stats.rx_frame_errors++;
1519 goto skip_packet;
1520 }
1521
1522
1523 if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1524 sc->lmc_device->stats.rx_errors++;
1525 sc->lmc_device->stats.rx_crc_errors++;
1526 goto skip_packet;
1527 }
1528
1529 if (len > LMC_PKT_BUF_SZ) {
1530 sc->lmc_device->stats.rx_length_errors++;
1531 localLengthErrCnt++;
1532 goto skip_packet;
1533 }
1534
1535 if (len < sc->lmc_crcSize + 2) {
1536 sc->lmc_device->stats.rx_length_errors++;
1537 sc->extra_stats.rx_SmallPktCnt++;
1538 localLengthErrCnt++;
1539 goto skip_packet;
1540 }
1541
1542 if(stat & 0x00004000){
1543 printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1544 }
1545
1546 len -= sc->lmc_crcSize;
1547
1548 skb = sc->lmc_rxq[i];
1549
1550 /*
1551 * We ran out of memory at some point
1552 * just allocate an skb buff and continue.
1553 */
1554
1555 if (!skb) {
1556 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1557 if (nsb) {
1558 sc->lmc_rxq[i] = nsb;
1559 nsb->dev = dev;
1560 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1561 }
1562 sc->failed_recv_alloc = 1;
1563 goto skip_packet;
1564 }
1565
1566 sc->lmc_device->stats.rx_packets++;
1567 sc->lmc_device->stats.rx_bytes += len;
1568
1569 LMC_CONSOLE_LOG("recv", skb->data, len);
1570
1571 /*
1572 * I'm not sure of the sanity of this
1573 * Packets could be arriving at a constant
1574 * 44.210mbits/sec and we're going to copy
1575 * them into a new buffer??
1576 */
1577
1578 if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1579 /*
1580 * If it's a large packet don't copy it just hand it up
1581 */
1582 give_it_anyways:
1583
1584 sc->lmc_rxq[i] = NULL;
1585 sc->lmc_rxring[i].buffer1 = 0x0;
1586
1587 skb_put (skb, len);
1588 skb->protocol = lmc_proto_type(sc, skb);
1589 skb_reset_mac_header(skb);
1590 /* skb_reset_network_header(skb); */
1591 skb->dev = dev;
1592 lmc_proto_netif(sc, skb);
1593
1594 /*
1595 * This skb will be destroyed by the upper layers, make a new one
1596 */
1597 nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1598 if (nsb) {
1599 sc->lmc_rxq[i] = nsb;
1600 nsb->dev = dev;
1601 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1602 /* Transferred to 21140 below */
1603 }
1604 else {
1605 /*
1606 * We've run out of memory, stop trying to allocate
1607 * memory and exit the interrupt handler
1608 *
1609 * The chip may run out of receivers and stop
1610 * in which care we'll try to allocate the buffer
1611 * again. (once a second)
1612 */
1613 sc->extra_stats.rx_BuffAllocErr++;
1614 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1615 sc->failed_recv_alloc = 1;
1616 goto skip_out_of_mem;
1617 }
1618 }
1619 else {
1620 nsb = dev_alloc_skb(len);
1621 if(!nsb) {
1622 goto give_it_anyways;
1623 }
1624 skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1625
1626 nsb->protocol = lmc_proto_type(sc, nsb);
1627 skb_reset_mac_header(nsb);
1628 /* skb_reset_network_header(nsb); */
1629 nsb->dev = dev;
1630 lmc_proto_netif(sc, nsb);
1631 }
1632
1633 skip_packet:
1634 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1635 sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1636
1637 sc->lmc_next_rx++;
1638 i = sc->lmc_next_rx % LMC_RXDESCS;
1639 rx_work_limit--;
1640 if (rx_work_limit < 0)
1641 break;
1642 }
1643
1644 /* detect condition for LMC1000 where DSU cable attaches and fills
1645 * descriptors with bogus packets
1646 *
1647 if (localLengthErrCnt > LMC_RXDESCS - 3) {
1648 sc->extra_stats.rx_BadPktSurgeCnt++;
1649 LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1650 sc->extra_stats.rx_BadPktSurgeCnt);
1651 } */
1652
1653 /* save max count of receive descriptors serviced */
1654 if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1655 sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1656
1657 #ifdef DEBUG
1658 if (rxIntLoopCnt == 0)
1659 {
1660 for (i = 0; i < LMC_RXDESCS; i++)
1661 {
1662 if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1663 != DESC_OWNED_BY_DC21X4)
1664 {
1665 rxIntLoopCnt++;
1666 }
1667 }
1668 LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1669 }
1670 #endif
1671
1672
1673 lmc_led_off(sc, LMC_DS3_LED3);
1674
1675 skip_out_of_mem:
1676
1677 lmc_trace(dev, "lmc_rx out");
1678
1679 return 0;
1680 }
1681
lmc_get_stats(struct net_device * dev)1682 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1683 {
1684 lmc_softc_t *sc = dev_to_sc(dev);
1685 unsigned long flags;
1686
1687 lmc_trace(dev, "lmc_get_stats in");
1688
1689 spin_lock_irqsave(&sc->lmc_lock, flags);
1690
1691 sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1692
1693 spin_unlock_irqrestore(&sc->lmc_lock, flags);
1694
1695 lmc_trace(dev, "lmc_get_stats out");
1696
1697 return &sc->lmc_device->stats;
1698 }
1699
1700 static struct pci_driver lmc_driver = {
1701 .name = "lmc",
1702 .id_table = lmc_pci_tbl,
1703 .probe = lmc_init_one,
1704 .remove = lmc_remove_one,
1705 };
1706
1707 module_pci_driver(lmc_driver);
1708
lmc_mii_readreg(lmc_softc_t * const sc,unsigned devaddr,unsigned regno)1709 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1710 {
1711 int i;
1712 int command = (0xf6 << 10) | (devaddr << 5) | regno;
1713 int retval = 0;
1714
1715 lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1716
1717 LMC_MII_SYNC (sc);
1718
1719 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1720
1721 for (i = 15; i >= 0; i--)
1722 {
1723 int dataval = (command & (1 << i)) ? 0x20000 : 0;
1724
1725 LMC_CSR_WRITE (sc, csr_9, dataval);
1726 lmc_delay ();
1727 /* __SLOW_DOWN_IO; */
1728 LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1729 lmc_delay ();
1730 /* __SLOW_DOWN_IO; */
1731 }
1732
1733 lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1734
1735 for (i = 19; i > 0; i--)
1736 {
1737 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1738 lmc_delay ();
1739 /* __SLOW_DOWN_IO; */
1740 retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1741 LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1742 lmc_delay ();
1743 /* __SLOW_DOWN_IO; */
1744 }
1745
1746 lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1747
1748 return (retval >> 1) & 0xffff;
1749 }
1750
lmc_mii_writereg(lmc_softc_t * const sc,unsigned devaddr,unsigned regno,unsigned data)1751 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1752 {
1753 int i = 32;
1754 int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1755
1756 lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1757
1758 LMC_MII_SYNC (sc);
1759
1760 i = 31;
1761 while (i >= 0)
1762 {
1763 int datav;
1764
1765 if (command & (1 << i))
1766 datav = 0x20000;
1767 else
1768 datav = 0x00000;
1769
1770 LMC_CSR_WRITE (sc, csr_9, datav);
1771 lmc_delay ();
1772 /* __SLOW_DOWN_IO; */
1773 LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1774 lmc_delay ();
1775 /* __SLOW_DOWN_IO; */
1776 i--;
1777 }
1778
1779 i = 2;
1780 while (i > 0)
1781 {
1782 LMC_CSR_WRITE (sc, csr_9, 0x40000);
1783 lmc_delay ();
1784 /* __SLOW_DOWN_IO; */
1785 LMC_CSR_WRITE (sc, csr_9, 0x50000);
1786 lmc_delay ();
1787 /* __SLOW_DOWN_IO; */
1788 i--;
1789 }
1790
1791 lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1792 }
1793
lmc_softreset(lmc_softc_t * const sc)1794 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1795 {
1796 int i;
1797
1798 lmc_trace(sc->lmc_device, "lmc_softreset in");
1799
1800 /* Initialize the receive rings and buffers. */
1801 sc->lmc_txfull = 0;
1802 sc->lmc_next_rx = 0;
1803 sc->lmc_next_tx = 0;
1804 sc->lmc_taint_rx = 0;
1805 sc->lmc_taint_tx = 0;
1806
1807 /*
1808 * Setup each one of the receiver buffers
1809 * allocate an skbuff for each one, setup the descriptor table
1810 * and point each buffer at the next one
1811 */
1812
1813 for (i = 0; i < LMC_RXDESCS; i++)
1814 {
1815 struct sk_buff *skb;
1816
1817 if (sc->lmc_rxq[i] == NULL)
1818 {
1819 skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1820 if(skb == NULL){
1821 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1822 sc->failed_ring = 1;
1823 break;
1824 }
1825 else{
1826 sc->lmc_rxq[i] = skb;
1827 }
1828 }
1829 else
1830 {
1831 skb = sc->lmc_rxq[i];
1832 }
1833
1834 skb->dev = sc->lmc_device;
1835
1836 /* owned by 21140 */
1837 sc->lmc_rxring[i].status = 0x80000000;
1838
1839 /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1840 sc->lmc_rxring[i].length = skb_tailroom(skb);
1841
1842 /* use to be tail which is dumb since you're thinking why write
1843 * to the end of the packj,et but since there's nothing there tail == data
1844 */
1845 sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1846
1847 /* This is fair since the structure is static and we have the next address */
1848 sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1849
1850 }
1851
1852 /*
1853 * Sets end of ring
1854 */
1855 if (i != 0) {
1856 sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1857 sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1858 }
1859 LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1860
1861 /* Initialize the transmit rings and buffers */
1862 for (i = 0; i < LMC_TXDESCS; i++)
1863 {
1864 if (sc->lmc_txq[i] != NULL){ /* have buffer */
1865 dev_kfree_skb(sc->lmc_txq[i]); /* free it */
1866 sc->lmc_device->stats.tx_dropped++; /* We just dropped a packet */
1867 }
1868 sc->lmc_txq[i] = NULL;
1869 sc->lmc_txring[i].status = 0x00000000;
1870 sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1871 }
1872 sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1873 LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1874
1875 lmc_trace(sc->lmc_device, "lmc_softreset out");
1876 }
1877
lmc_gpio_mkinput(lmc_softc_t * const sc,u32 bits)1878 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1879 {
1880 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1881 sc->lmc_gpio_io &= ~bits;
1882 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1883 lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1884 }
1885
lmc_gpio_mkoutput(lmc_softc_t * const sc,u32 bits)1886 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1887 {
1888 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1889 sc->lmc_gpio_io |= bits;
1890 LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1891 lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1892 }
1893
lmc_led_on(lmc_softc_t * const sc,u32 led)1894 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1895 {
1896 lmc_trace(sc->lmc_device, "lmc_led_on in");
1897 if((~sc->lmc_miireg16) & led){ /* Already on! */
1898 lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1899 return;
1900 }
1901
1902 sc->lmc_miireg16 &= ~led;
1903 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1904 lmc_trace(sc->lmc_device, "lmc_led_on out");
1905 }
1906
lmc_led_off(lmc_softc_t * const sc,u32 led)1907 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1908 {
1909 lmc_trace(sc->lmc_device, "lmc_led_off in");
1910 if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1911 lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1912 return;
1913 }
1914
1915 sc->lmc_miireg16 |= led;
1916 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1917 lmc_trace(sc->lmc_device, "lmc_led_off out");
1918 }
1919
lmc_reset(lmc_softc_t * const sc)1920 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1921 {
1922 lmc_trace(sc->lmc_device, "lmc_reset in");
1923 sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1924 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1925
1926 sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1927 lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1928
1929 /*
1930 * make some of the GPIO pins be outputs
1931 */
1932 lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1933
1934 /*
1935 * RESET low to force state reset. This also forces
1936 * the transmitter clock to be internal, but we expect to reset
1937 * that later anyway.
1938 */
1939 sc->lmc_gpio &= ~(LMC_GEP_RESET);
1940 LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1941
1942 /*
1943 * hold for more than 10 microseconds
1944 */
1945 udelay(50);
1946
1947 /*
1948 * stop driving Xilinx-related signals
1949 */
1950 lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1951
1952 /*
1953 * Call media specific init routine
1954 */
1955 sc->lmc_media->init(sc);
1956
1957 sc->extra_stats.resetCount++;
1958 lmc_trace(sc->lmc_device, "lmc_reset out");
1959 }
1960
lmc_dec_reset(lmc_softc_t * const sc)1961 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
1962 {
1963 u32 val;
1964 lmc_trace(sc->lmc_device, "lmc_dec_reset in");
1965
1966 /*
1967 * disable all interrupts
1968 */
1969 sc->lmc_intrmask = 0;
1970 LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
1971
1972 /*
1973 * Reset the chip with a software reset command.
1974 * Wait 10 microseconds (actually 50 PCI cycles but at
1975 * 33MHz that comes to two microseconds but wait a
1976 * bit longer anyways)
1977 */
1978 LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
1979 udelay(25);
1980 #ifdef __sparc__
1981 sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
1982 sc->lmc_busmode = 0x00100000;
1983 sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
1984 LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
1985 #endif
1986 sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
1987
1988 /*
1989 * We want:
1990 * no ethernet address in frames we write
1991 * disable padding (txdesc, padding disable)
1992 * ignore runt frames (rdes0 bit 15)
1993 * no receiver watchdog or transmitter jabber timer
1994 * (csr15 bit 0,14 == 1)
1995 * if using 16-bit CRC, turn off CRC (trans desc, crc disable)
1996 */
1997
1998 sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
1999 | TULIP_CMD_FULLDUPLEX
2000 | TULIP_CMD_PASSBADPKT
2001 | TULIP_CMD_NOHEARTBEAT
2002 | TULIP_CMD_PORTSELECT
2003 | TULIP_CMD_RECEIVEALL
2004 | TULIP_CMD_MUSTBEONE
2005 );
2006 sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2007 | TULIP_CMD_THRESHOLDCTL
2008 | TULIP_CMD_STOREFWD
2009 | TULIP_CMD_TXTHRSHLDCTL
2010 );
2011
2012 LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2013
2014 /*
2015 * disable receiver watchdog and transmit jabber
2016 */
2017 val = LMC_CSR_READ(sc, csr_sia_general);
2018 val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2019 LMC_CSR_WRITE(sc, csr_sia_general, val);
2020
2021 lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2022 }
2023
lmc_initcsrs(lmc_softc_t * const sc,lmc_csrptr_t csr_base,size_t csr_size)2024 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2025 size_t csr_size)
2026 {
2027 lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2028 sc->lmc_csrs.csr_busmode = csr_base + 0 * csr_size;
2029 sc->lmc_csrs.csr_txpoll = csr_base + 1 * csr_size;
2030 sc->lmc_csrs.csr_rxpoll = csr_base + 2 * csr_size;
2031 sc->lmc_csrs.csr_rxlist = csr_base + 3 * csr_size;
2032 sc->lmc_csrs.csr_txlist = csr_base + 4 * csr_size;
2033 sc->lmc_csrs.csr_status = csr_base + 5 * csr_size;
2034 sc->lmc_csrs.csr_command = csr_base + 6 * csr_size;
2035 sc->lmc_csrs.csr_intr = csr_base + 7 * csr_size;
2036 sc->lmc_csrs.csr_missed_frames = csr_base + 8 * csr_size;
2037 sc->lmc_csrs.csr_9 = csr_base + 9 * csr_size;
2038 sc->lmc_csrs.csr_10 = csr_base + 10 * csr_size;
2039 sc->lmc_csrs.csr_11 = csr_base + 11 * csr_size;
2040 sc->lmc_csrs.csr_12 = csr_base + 12 * csr_size;
2041 sc->lmc_csrs.csr_13 = csr_base + 13 * csr_size;
2042 sc->lmc_csrs.csr_14 = csr_base + 14 * csr_size;
2043 sc->lmc_csrs.csr_15 = csr_base + 15 * csr_size;
2044 lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2045 }
2046
lmc_driver_timeout(struct net_device * dev)2047 static void lmc_driver_timeout(struct net_device *dev)
2048 {
2049 lmc_softc_t *sc = dev_to_sc(dev);
2050 u32 csr6;
2051 unsigned long flags;
2052
2053 lmc_trace(dev, "lmc_driver_timeout in");
2054
2055 spin_lock_irqsave(&sc->lmc_lock, flags);
2056
2057 printk("%s: Xmitter busy|\n", dev->name);
2058
2059 sc->extra_stats.tx_tbusy_calls++;
2060 if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2061 goto bug_out;
2062
2063 /*
2064 * Chip seems to have locked up
2065 * Reset it
2066 * This whips out all our decriptor
2067 * table and starts from scartch
2068 */
2069
2070 LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2071 LMC_CSR_READ (sc, csr_status),
2072 sc->extra_stats.tx_ProcTimeout);
2073
2074 lmc_running_reset (dev);
2075
2076 LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2077 LMC_EVENT_LOG(LMC_EVENT_RESET2,
2078 lmc_mii_readreg (sc, 0, 16),
2079 lmc_mii_readreg (sc, 0, 17));
2080
2081 /* restart the tx processes */
2082 csr6 = LMC_CSR_READ (sc, csr_command);
2083 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2084 LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2085
2086 /* immediate transmit */
2087 LMC_CSR_WRITE (sc, csr_txpoll, 0);
2088
2089 sc->lmc_device->stats.tx_errors++;
2090 sc->extra_stats.tx_ProcTimeout++; /* -baz */
2091
2092 netif_trans_update(dev); /* prevent tx timeout */
2093
2094 bug_out:
2095
2096 spin_unlock_irqrestore(&sc->lmc_lock, flags);
2097
2098 lmc_trace(dev, "lmc_driver_timeout out");
2099
2100
2101 }
2102
