1  /*
2   * Copyright (c) 1997-2000 LAN Media Corporation (LMC)
3   * All rights reserved.  www.lanmedia.com
4   * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
5   *
6   * This code is written by:
7   * Andrew Stanley-Jones (asj@cban.com)
8   * Rob Braun (bbraun@vix.com),
9   * Michael Graff (explorer@vix.com) and
10   * Matt Thomas (matt@3am-software.com).
11   *
12   * With Help By:
13   * David Boggs
14   * Ron Crane
15   * Alan Cox
16   *
17   * This software may be used and distributed according to the terms
18   * of the GNU General Public License version 2, incorporated herein by reference.
19   *
20   * Driver for the LanMedia LMC5200, LMC5245, LMC1000, LMC1200 cards.
21   *
22   * To control link specific options lmcctl is required.
23   * It can be obtained from ftp.lanmedia.com.
24   *
25   * Linux driver notes:
26   * Linux uses the device struct lmc_private to pass private information
27   * around.
28   *
29   * The initialization portion of this driver (the lmc_reset() and the
30   * lmc_dec_reset() functions, as well as the led controls and the
31   * lmc_initcsrs() functions.
32   *
33   * The watchdog function runs every second and checks to see if
34   * we still have link, and that the timing source is what we expected
35   * it to be.  If link is lost, the interface is marked down, and
36   * we no longer can transmit.
37   *
38   */
39 
40 #include <linux/kernel.h>
41 #include <linux/module.h>
42 #include <linux/string.h>
43 #include <linux/timer.h>
44 #include <linux/ptrace.h>
45 #include <linux/errno.h>
46 #include <linux/ioport.h>
47 #include <linux/slab.h>
48 #include <linux/interrupt.h>
49 #include <linux/pci.h>
50 #include <linux/delay.h>
51 #include <linux/hdlc.h>
52 #include <linux/init.h>
53 #include <linux/in.h>
54 #include <linux/if_arp.h>
55 #include <linux/netdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/skbuff.h>
58 #include <linux/inet.h>
59 #include <linux/bitops.h>
60 #include <asm/processor.h>             /* Processor type for cache alignment. */
61 #include <asm/io.h>
62 #include <asm/dma.h>
63 #include <asm/uaccess.h>
64 //#include <asm/spinlock.h>
65 
66 #define DRIVER_MAJOR_VERSION     1
67 #define DRIVER_MINOR_VERSION    34
68 #define DRIVER_SUB_VERSION       0
69 
70 #define DRIVER_VERSION  ((DRIVER_MAJOR_VERSION << 8) + DRIVER_MINOR_VERSION)
71 
72 #include "lmc.h"
73 #include "lmc_var.h"
74 #include "lmc_ioctl.h"
75 #include "lmc_debug.h"
76 #include "lmc_proto.h"
77 
78 static int LMC_PKT_BUF_SZ = 1542;
79 
80 static DEFINE_PCI_DEVICE_TABLE(lmc_pci_tbl) = {
81 	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
82 	  PCI_VENDOR_ID_LMC, PCI_ANY_ID },
83 	{ PCI_VENDOR_ID_DEC, PCI_DEVICE_ID_DEC_TULIP_FAST,
84 	  PCI_ANY_ID, PCI_VENDOR_ID_LMC },
85 	{ 0 }
86 };
87 
88 MODULE_DEVICE_TABLE(pci, lmc_pci_tbl);
89 MODULE_LICENSE("GPL v2");
90 
91 
92 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
93 					struct net_device *dev);
94 static int lmc_rx (struct net_device *dev);
95 static int lmc_open(struct net_device *dev);
96 static int lmc_close(struct net_device *dev);
97 static struct net_device_stats *lmc_get_stats(struct net_device *dev);
98 static irqreturn_t lmc_interrupt(int irq, void *dev_instance);
99 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, size_t csr_size);
100 static void lmc_softreset(lmc_softc_t * const);
101 static void lmc_running_reset(struct net_device *dev);
102 static int lmc_ifdown(struct net_device * const);
103 static void lmc_watchdog(unsigned long data);
104 static void lmc_reset(lmc_softc_t * const sc);
105 static void lmc_dec_reset(lmc_softc_t * const sc);
106 static void lmc_driver_timeout(struct net_device *dev);
107 
108 /*
109  * linux reserves 16 device specific IOCTLs.  We call them
110  * LMCIOC* to control various bits of our world.
111  */
lmc_ioctl(struct net_device * dev,struct ifreq * ifr,int cmd)112 int lmc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) /*fold00*/
113 {
114     lmc_softc_t *sc = dev_to_sc(dev);
115     lmc_ctl_t ctl;
116     int ret = -EOPNOTSUPP;
117     u16 regVal;
118     unsigned long flags;
119 
120     lmc_trace(dev, "lmc_ioctl in");
121 
122     /*
123      * Most functions mess with the structure
124      * Disable interrupts while we do the polling
125      */
126 
127     switch (cmd) {
128         /*
129          * Return current driver state.  Since we keep this up
130          * To date internally, just copy this out to the user.
131          */
132     case LMCIOCGINFO: /*fold01*/
133 	if (copy_to_user(ifr->ifr_data, &sc->ictl, sizeof(lmc_ctl_t)))
134 		ret = -EFAULT;
135 	else
136 		ret = 0;
137         break;
138 
139     case LMCIOCSINFO: /*fold01*/
140         if (!capable(CAP_NET_ADMIN)) {
141             ret = -EPERM;
142             break;
143         }
144 
145         if(dev->flags & IFF_UP){
146             ret = -EBUSY;
147             break;
148         }
149 
150 	if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
151 		ret = -EFAULT;
152 		break;
153 	}
154 
155 	spin_lock_irqsave(&sc->lmc_lock, flags);
156         sc->lmc_media->set_status (sc, &ctl);
157 
158         if(ctl.crc_length != sc->ictl.crc_length) {
159             sc->lmc_media->set_crc_length(sc, ctl.crc_length);
160 	    if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16)
161 		sc->TxDescriptControlInit |=  LMC_TDES_ADD_CRC_DISABLE;
162 	    else
163 		sc->TxDescriptControlInit &= ~LMC_TDES_ADD_CRC_DISABLE;
164         }
165 	spin_unlock_irqrestore(&sc->lmc_lock, flags);
166 
167         ret = 0;
168         break;
169 
170     case LMCIOCIFTYPE: /*fold01*/
171         {
172 	    u16 old_type = sc->if_type;
173 	    u16	new_type;
174 
175 	    if (!capable(CAP_NET_ADMIN)) {
176 		ret = -EPERM;
177 		break;
178 	    }
179 
180 	    if (copy_from_user(&new_type, ifr->ifr_data, sizeof(u16))) {
181 		ret = -EFAULT;
182 		break;
183 	    }
184 
185 
186 	    if (new_type == old_type)
187 	    {
188 		ret = 0 ;
189 		break;				/* no change */
190             }
191 
192 	    spin_lock_irqsave(&sc->lmc_lock, flags);
193             lmc_proto_close(sc);
194 
195             sc->if_type = new_type;
196             lmc_proto_attach(sc);
197 	    ret = lmc_proto_open(sc);
198 	    spin_unlock_irqrestore(&sc->lmc_lock, flags);
199 	    break;
200 	}
201 
202     case LMCIOCGETXINFO: /*fold01*/
203 	spin_lock_irqsave(&sc->lmc_lock, flags);
204         sc->lmc_xinfo.Magic0 = 0xBEEFCAFE;
205 
206         sc->lmc_xinfo.PciCardType = sc->lmc_cardtype;
207         sc->lmc_xinfo.PciSlotNumber = 0;
208         sc->lmc_xinfo.DriverMajorVersion = DRIVER_MAJOR_VERSION;
209         sc->lmc_xinfo.DriverMinorVersion = DRIVER_MINOR_VERSION;
210         sc->lmc_xinfo.DriverSubVersion = DRIVER_SUB_VERSION;
211         sc->lmc_xinfo.XilinxRevisionNumber =
212             lmc_mii_readreg (sc, 0, 3) & 0xf;
213         sc->lmc_xinfo.MaxFrameSize = LMC_PKT_BUF_SZ;
214         sc->lmc_xinfo.link_status = sc->lmc_media->get_link_status (sc);
215         sc->lmc_xinfo.mii_reg16 = lmc_mii_readreg (sc, 0, 16);
216 	spin_unlock_irqrestore(&sc->lmc_lock, flags);
217 
218         sc->lmc_xinfo.Magic1 = 0xDEADBEEF;
219 
220         if (copy_to_user(ifr->ifr_data, &sc->lmc_xinfo,
221 			 sizeof(struct lmc_xinfo)))
222 		ret = -EFAULT;
223 	else
224 		ret = 0;
225 
226         break;
227 
228     case LMCIOCGETLMCSTATS:
229 	    spin_lock_irqsave(&sc->lmc_lock, flags);
230 	    if (sc->lmc_cardtype == LMC_CARDTYPE_T1) {
231 		    lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_LSB);
232 		    sc->extra_stats.framingBitErrorCount +=
233 			    lmc_mii_readreg(sc, 0, 18) & 0xff;
234 		    lmc_mii_writereg(sc, 0, 17, T1FRAMER_FERR_MSB);
235 		    sc->extra_stats.framingBitErrorCount +=
236 			    (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
237 		    lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_LSB);
238 		    sc->extra_stats.lineCodeViolationCount +=
239 			    lmc_mii_readreg(sc, 0, 18) & 0xff;
240 		    lmc_mii_writereg(sc, 0, 17, T1FRAMER_LCV_MSB);
241 		    sc->extra_stats.lineCodeViolationCount +=
242 			    (lmc_mii_readreg(sc, 0, 18) & 0xff) << 8;
243 		    lmc_mii_writereg(sc, 0, 17, T1FRAMER_AERR);
244 		    regVal = lmc_mii_readreg(sc, 0, 18) & 0xff;
245 
246 		    sc->extra_stats.lossOfFrameCount +=
247 			    (regVal & T1FRAMER_LOF_MASK) >> 4;
248 		    sc->extra_stats.changeOfFrameAlignmentCount +=
249 			    (regVal & T1FRAMER_COFA_MASK) >> 2;
250 		    sc->extra_stats.severelyErroredFrameCount +=
251 			    regVal & T1FRAMER_SEF_MASK;
252 	    }
253 	    spin_unlock_irqrestore(&sc->lmc_lock, flags);
254 	    if (copy_to_user(ifr->ifr_data, &sc->lmc_device->stats,
255 			     sizeof(sc->lmc_device->stats)) ||
256 		copy_to_user(ifr->ifr_data + sizeof(sc->lmc_device->stats),
257 			     &sc->extra_stats, sizeof(sc->extra_stats)))
258 		    ret = -EFAULT;
259 	    else
260 		    ret = 0;
261 	    break;
262 
263     case LMCIOCCLEARLMCSTATS:
264 	    if (!capable(CAP_NET_ADMIN)) {
265 		    ret = -EPERM;
266 		    break;
267 	    }
268 
269 	    spin_lock_irqsave(&sc->lmc_lock, flags);
270 	    memset(&sc->lmc_device->stats, 0, sizeof(sc->lmc_device->stats));
271 	    memset(&sc->extra_stats, 0, sizeof(sc->extra_stats));
272 	    sc->extra_stats.check = STATCHECK;
273 	    sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
274 		    sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
275 	    sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
276 	    spin_unlock_irqrestore(&sc->lmc_lock, flags);
277 	    ret = 0;
278 	    break;
279 
280     case LMCIOCSETCIRCUIT: /*fold01*/
281         if (!capable(CAP_NET_ADMIN)){
282             ret = -EPERM;
283             break;
284         }
285 
286         if(dev->flags & IFF_UP){
287             ret = -EBUSY;
288             break;
289         }
290 
291 	if (copy_from_user(&ctl, ifr->ifr_data, sizeof(lmc_ctl_t))) {
292 		ret = -EFAULT;
293 		break;
294 	}
295 	spin_lock_irqsave(&sc->lmc_lock, flags);
296         sc->lmc_media->set_circuit_type(sc, ctl.circuit_type);
297         sc->ictl.circuit_type = ctl.circuit_type;
298 	spin_unlock_irqrestore(&sc->lmc_lock, flags);
299         ret = 0;
300 
301         break;
302 
303     case LMCIOCRESET: /*fold01*/
304         if (!capable(CAP_NET_ADMIN)){
305             ret = -EPERM;
306             break;
307         }
308 
309 	spin_lock_irqsave(&sc->lmc_lock, flags);
310         /* Reset driver and bring back to current state */
311         printk (" REG16 before reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
312         lmc_running_reset (dev);
313         printk (" REG16 after reset +%04x\n", lmc_mii_readreg (sc, 0, 16));
314 
315         LMC_EVENT_LOG(LMC_EVENT_FORCEDRESET, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
316 	spin_unlock_irqrestore(&sc->lmc_lock, flags);
317 
318         ret = 0;
319         break;
320 
321 #ifdef DEBUG
322     case LMCIOCDUMPEVENTLOG:
323 	if (copy_to_user(ifr->ifr_data, &lmcEventLogIndex, sizeof(u32))) {
324 		ret = -EFAULT;
325 		break;
326 	}
327 	if (copy_to_user(ifr->ifr_data + sizeof(u32), lmcEventLogBuf,
328 			 sizeof(lmcEventLogBuf)))
329 		ret = -EFAULT;
330 	else
331 		ret = 0;
332 
333         break;
334 #endif /* end ifdef _DBG_EVENTLOG */
335     case LMCIOCT1CONTROL: /*fold01*/
336         if (sc->lmc_cardtype != LMC_CARDTYPE_T1){
337             ret = -EOPNOTSUPP;
338             break;
339         }
340         break;
341     case LMCIOCXILINX: /*fold01*/
342         {
343             struct lmc_xilinx_control xc; /*fold02*/
344 
345             if (!capable(CAP_NET_ADMIN)){
346                 ret = -EPERM;
347                 break;
348             }
349 
350             /*
351              * Stop the xwitter whlie we restart the hardware
352              */
353             netif_stop_queue(dev);
354 
355 	    if (copy_from_user(&xc, ifr->ifr_data, sizeof(struct lmc_xilinx_control))) {
356 		ret = -EFAULT;
357 		break;
358 	    }
359             switch(xc.command){
360             case lmc_xilinx_reset: /*fold02*/
361                 {
362                     u16 mii;
363 		    spin_lock_irqsave(&sc->lmc_lock, flags);
364                     mii = lmc_mii_readreg (sc, 0, 16);
365 
366                     /*
367                      * Make all of them 0 and make input
368                      */
369                     lmc_gpio_mkinput(sc, 0xff);
370 
371                     /*
372                      * make the reset output
373                      */
374                     lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
375 
376                     /*
377                      * RESET low to force configuration.  This also forces
378                      * the transmitter clock to be internal, but we expect to reset
379                      * that later anyway.
380                      */
381 
382                     sc->lmc_gpio &= ~LMC_GEP_RESET;
383                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
384 
385 
386                     /*
387                      * hold for more than 10 microseconds
388                      */
389                     udelay(50);
390 
391                     sc->lmc_gpio |= LMC_GEP_RESET;
392                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
393 
394 
395                     /*
396                      * stop driving Xilinx-related signals
397                      */
398                     lmc_gpio_mkinput(sc, 0xff);
399 
400                     /* Reset the frammer hardware */
401                     sc->lmc_media->set_link_status (sc, 1);
402                     sc->lmc_media->set_status (sc, NULL);
403 //                    lmc_softreset(sc);
404 
405                     {
406                         int i;
407                         for(i = 0; i < 5; i++){
408                             lmc_led_on(sc, LMC_DS3_LED0);
409                             mdelay(100);
410                             lmc_led_off(sc, LMC_DS3_LED0);
411                             lmc_led_on(sc, LMC_DS3_LED1);
412                             mdelay(100);
413                             lmc_led_off(sc, LMC_DS3_LED1);
414                             lmc_led_on(sc, LMC_DS3_LED3);
415                             mdelay(100);
416                             lmc_led_off(sc, LMC_DS3_LED3);
417                             lmc_led_on(sc, LMC_DS3_LED2);
418                             mdelay(100);
419                             lmc_led_off(sc, LMC_DS3_LED2);
420                         }
421                     }
422 		    spin_unlock_irqrestore(&sc->lmc_lock, flags);
423 
424 
425 
426                     ret = 0x0;
427 
428                 }
429 
430                 break;
431             case lmc_xilinx_load_prom: /*fold02*/
432                 {
433                     u16 mii;
434                     int timeout = 500000;
435 		    spin_lock_irqsave(&sc->lmc_lock, flags);
436                     mii = lmc_mii_readreg (sc, 0, 16);
437 
438                     /*
439                      * Make all of them 0 and make input
440                      */
441                     lmc_gpio_mkinput(sc, 0xff);
442 
443                     /*
444                      * make the reset output
445                      */
446                     lmc_gpio_mkoutput(sc,  LMC_GEP_DP | LMC_GEP_RESET);
447 
448                     /*
449                      * RESET low to force configuration.  This also forces
450                      * the transmitter clock to be internal, but we expect to reset
451                      * that later anyway.
452                      */
453 
454                     sc->lmc_gpio &= ~(LMC_GEP_RESET | LMC_GEP_DP);
455                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
456 
457 
458                     /*
459                      * hold for more than 10 microseconds
460                      */
461                     udelay(50);
462 
463                     sc->lmc_gpio |= LMC_GEP_DP | LMC_GEP_RESET;
464                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
465 
466                     /*
467                      * busy wait for the chip to reset
468                      */
469                     while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
470                            (timeout-- > 0))
471                         cpu_relax();
472 
473 
474                     /*
475                      * stop driving Xilinx-related signals
476                      */
477                     lmc_gpio_mkinput(sc, 0xff);
478 		    spin_unlock_irqrestore(&sc->lmc_lock, flags);
479 
480                     ret = 0x0;
481 
482 
483                     break;
484 
485                 }
486 
487             case lmc_xilinx_load: /*fold02*/
488                 {
489                     char *data;
490                     int pos;
491                     int timeout = 500000;
492 
493                     if (!xc.data) {
494                             ret = -EINVAL;
495                             break;
496                     }
497 
498                     data = kmalloc(xc.len, GFP_KERNEL);
499                     if (!data) {
500                             printk(KERN_WARNING "%s: Failed to allocate memory for copy\n", dev->name);
501                             ret = -ENOMEM;
502                             break;
503                     }
504 
505                     if(copy_from_user(data, xc.data, xc.len))
506                     {
507                     	kfree(data);
508                     	ret = -ENOMEM;
509                     	break;
510                     }
511 
512                     printk("%s: Starting load of data Len: %d at 0x%p == 0x%p\n", dev->name, xc.len, xc.data, data);
513 
514 		    spin_lock_irqsave(&sc->lmc_lock, flags);
515                     lmc_gpio_mkinput(sc, 0xff);
516 
517                     /*
518                      * Clear the Xilinx and start prgramming from the DEC
519                      */
520 
521                     /*
522                      * Set ouput as:
523                      * Reset: 0 (active)
524                      * DP:    0 (active)
525                      * Mode:  1
526                      *
527                      */
528                     sc->lmc_gpio = 0x00;
529                     sc->lmc_gpio &= ~LMC_GEP_DP;
530                     sc->lmc_gpio &= ~LMC_GEP_RESET;
531                     sc->lmc_gpio |=  LMC_GEP_MODE;
532                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
533 
534                     lmc_gpio_mkoutput(sc, LMC_GEP_MODE | LMC_GEP_DP | LMC_GEP_RESET);
535 
536                     /*
537                      * Wait at least 10 us 20 to be safe
538                      */
539                     udelay(50);
540 
541                     /*
542                      * Clear reset and activate programming lines
543                      * Reset: Input
544                      * DP:    Input
545                      * Clock: Output
546                      * Data:  Output
547                      * Mode:  Output
548                      */
549                     lmc_gpio_mkinput(sc, LMC_GEP_DP | LMC_GEP_RESET);
550 
551                     /*
552                      * Set LOAD, DATA, Clock to 1
553                      */
554                     sc->lmc_gpio = 0x00;
555                     sc->lmc_gpio |= LMC_GEP_MODE;
556                     sc->lmc_gpio |= LMC_GEP_DATA;
557                     sc->lmc_gpio |= LMC_GEP_CLK;
558                     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
559 
560                     lmc_gpio_mkoutput(sc, LMC_GEP_DATA | LMC_GEP_CLK | LMC_GEP_MODE );
561 
562                     /*
563                      * busy wait for the chip to reset
564                      */
565                     while( (LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0 &&
566                            (timeout-- > 0))
567                         cpu_relax();
568 
569                     printk(KERN_DEBUG "%s: Waited %d for the Xilinx to clear it's memory\n", dev->name, 500000-timeout);
570 
571                     for(pos = 0; pos < xc.len; pos++){
572                         switch(data[pos]){
573                         case 0:
574                             sc->lmc_gpio &= ~LMC_GEP_DATA; /* Data is 0 */
575                             break;
576                         case 1:
577                             sc->lmc_gpio |= LMC_GEP_DATA; /* Data is 1 */
578                             break;
579                         default:
580                             printk(KERN_WARNING "%s Bad data in xilinx programming data at %d, got %d wanted 0 or 1\n", dev->name, pos, data[pos]);
581                             sc->lmc_gpio |= LMC_GEP_DATA; /* Assume it's 1 */
582                         }
583                         sc->lmc_gpio &= ~LMC_GEP_CLK; /* Clock to zero */
584                         sc->lmc_gpio |= LMC_GEP_MODE;
585                         LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
586                         udelay(1);
587 
588                         sc->lmc_gpio |= LMC_GEP_CLK; /* Put the clack back to one */
589                         sc->lmc_gpio |= LMC_GEP_MODE;
590                         LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
591                         udelay(1);
592                     }
593                     if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_INIT) == 0){
594                         printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (corrupted data)\n", dev->name);
595                     }
596                     else if((LMC_CSR_READ(sc, csr_gp) & LMC_GEP_DP) == 0){
597                         printk(KERN_WARNING "%s: Reprogramming FAILED. Needs to be reprogrammed. (done)\n", dev->name);
598                     }
599                     else {
600                         printk(KERN_DEBUG "%s: Done reprogramming Xilinx, %d bits, good luck!\n", dev->name, pos);
601                     }
602 
603                     lmc_gpio_mkinput(sc, 0xff);
604 
605                     sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
606                     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
607 
608                     sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
609                     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
610 		    spin_unlock_irqrestore(&sc->lmc_lock, flags);
611 
612                     kfree(data);
613 
614                     ret = 0;
615 
616                     break;
617                 }
618             default: /*fold02*/
619                 ret = -EBADE;
620                 break;
621             }
622 
623             netif_wake_queue(dev);
624             sc->lmc_txfull = 0;
625 
626         }
627         break;
628     default: /*fold01*/
629         /* If we don't know what to do, give the protocol a shot. */
630         ret = lmc_proto_ioctl (sc, ifr, cmd);
631         break;
632     }
633 
634     lmc_trace(dev, "lmc_ioctl out");
635 
636     return ret;
637 }
638 
639 
640 /* the watchdog process that cruises around */
lmc_watchdog(unsigned long data)641 static void lmc_watchdog (unsigned long data) /*fold00*/
642 {
643     struct net_device *dev = (struct net_device *)data;
644     lmc_softc_t *sc = dev_to_sc(dev);
645     int link_status;
646     u32 ticks;
647     unsigned long flags;
648 
649     lmc_trace(dev, "lmc_watchdog in");
650 
651     spin_lock_irqsave(&sc->lmc_lock, flags);
652 
653     if(sc->check != 0xBEAFCAFE){
654         printk("LMC: Corrupt net_device struct, breaking out\n");
655 	spin_unlock_irqrestore(&sc->lmc_lock, flags);
656         return;
657     }
658 
659 
660     /* Make sure the tx jabber and rx watchdog are off,
661      * and the transmit and receive processes are running.
662      */
663 
664     LMC_CSR_WRITE (sc, csr_15, 0x00000011);
665     sc->lmc_cmdmode |= TULIP_CMD_TXRUN | TULIP_CMD_RXRUN;
666     LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
667 
668     if (sc->lmc_ok == 0)
669         goto kick_timer;
670 
671     LMC_EVENT_LOG(LMC_EVENT_WATCHDOG, LMC_CSR_READ (sc, csr_status), lmc_mii_readreg (sc, 0, 16));
672 
673     /* --- begin time out check -----------------------------------
674      * check for a transmit interrupt timeout
675      * Has the packet xmt vs xmt serviced threshold been exceeded */
676     if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
677 	sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
678 	sc->tx_TimeoutInd == 0)
679     {
680 
681         /* wait for the watchdog to come around again */
682         sc->tx_TimeoutInd = 1;
683     }
684     else if (sc->lmc_taint_tx == sc->lastlmc_taint_tx &&
685 	     sc->lmc_device->stats.tx_packets > sc->lasttx_packets &&
686 	     sc->tx_TimeoutInd)
687     {
688 
689         LMC_EVENT_LOG(LMC_EVENT_XMTINTTMO, LMC_CSR_READ (sc, csr_status), 0);
690 
691         sc->tx_TimeoutDisplay = 1;
692 	sc->extra_stats.tx_TimeoutCnt++;
693 
694         /* DEC chip is stuck, hit it with a RESET!!!! */
695         lmc_running_reset (dev);
696 
697 
698         /* look at receive & transmit process state to make sure they are running */
699         LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
700 
701         /* look at: DSR - 02  for Reg 16
702          *                  CTS - 08
703          *                  DCD - 10
704          *                  RI  - 20
705          * for Reg 17
706          */
707         LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg (sc, 0, 16), lmc_mii_readreg (sc, 0, 17));
708 
709         /* reset the transmit timeout detection flag */
710         sc->tx_TimeoutInd = 0;
711         sc->lastlmc_taint_tx = sc->lmc_taint_tx;
712 	sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
713     } else {
714         sc->tx_TimeoutInd = 0;
715         sc->lastlmc_taint_tx = sc->lmc_taint_tx;
716 	sc->lasttx_packets = sc->lmc_device->stats.tx_packets;
717     }
718 
719     /* --- end time out check ----------------------------------- */
720 
721 
722     link_status = sc->lmc_media->get_link_status (sc);
723 
724     /*
725      * hardware level link lost, but the interface is marked as up.
726      * Mark it as down.
727      */
728     if ((link_status == 0) && (sc->last_link_status != 0)) {
729         printk(KERN_WARNING "%s: hardware/physical link down\n", dev->name);
730         sc->last_link_status = 0;
731         /* lmc_reset (sc); Why reset??? The link can go down ok */
732 
733         /* Inform the world that link has been lost */
734 	netif_carrier_off(dev);
735     }
736 
737     /*
738      * hardware link is up, but the interface is marked as down.
739      * Bring it back up again.
740      */
741      if (link_status != 0 && sc->last_link_status == 0) {
742          printk(KERN_WARNING "%s: hardware/physical link up\n", dev->name);
743          sc->last_link_status = 1;
744          /* lmc_reset (sc); Again why reset??? */
745 
746 	 netif_carrier_on(dev);
747      }
748 
749     /* Call media specific watchdog functions */
750     sc->lmc_media->watchdog(sc);
751 
752     /*
753      * Poke the transmitter to make sure it
754      * never stops, even if we run out of mem
755      */
756     LMC_CSR_WRITE(sc, csr_rxpoll, 0);
757 
758     /*
759      * Check for code that failed
760      * and try and fix it as appropriate
761      */
762     if(sc->failed_ring == 1){
763         /*
764          * Failed to setup the recv/xmit rin
765          * Try again
766          */
767         sc->failed_ring = 0;
768         lmc_softreset(sc);
769     }
770     if(sc->failed_recv_alloc == 1){
771         /*
772          * We failed to alloc mem in the
773          * interrupt handler, go through the rings
774          * and rebuild them
775          */
776         sc->failed_recv_alloc = 0;
777         lmc_softreset(sc);
778     }
779 
780 
781     /*
782      * remember the timer value
783      */
784 kick_timer:
785 
786     ticks = LMC_CSR_READ (sc, csr_gp_timer);
787     LMC_CSR_WRITE (sc, csr_gp_timer, 0xffffffffUL);
788     sc->ictl.ticks = 0x0000ffff - (ticks & 0x0000ffff);
789 
790     /*
791      * restart this timer.
792      */
793     sc->timer.expires = jiffies + (HZ);
794     add_timer (&sc->timer);
795 
796     spin_unlock_irqrestore(&sc->lmc_lock, flags);
797 
798     lmc_trace(dev, "lmc_watchdog out");
799 
800 }
801 
lmc_attach(struct net_device * dev,unsigned short encoding,unsigned short parity)802 static int lmc_attach(struct net_device *dev, unsigned short encoding,
803 		      unsigned short parity)
804 {
805 	if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
806 		return 0;
807 	return -EINVAL;
808 }
809 
810 static const struct net_device_ops lmc_ops = {
811 	.ndo_open       = lmc_open,
812 	.ndo_stop       = lmc_close,
813 	.ndo_change_mtu = hdlc_change_mtu,
814 	.ndo_start_xmit = hdlc_start_xmit,
815 	.ndo_do_ioctl   = lmc_ioctl,
816 	.ndo_tx_timeout = lmc_driver_timeout,
817 	.ndo_get_stats  = lmc_get_stats,
818 };
819 
lmc_init_one(struct pci_dev * pdev,const struct pci_device_id * ent)820 static int __devinit lmc_init_one(struct pci_dev *pdev,
821 				  const struct pci_device_id *ent)
822 {
823 	lmc_softc_t *sc;
824 	struct net_device *dev;
825 	u16 subdevice;
826 	u16 AdapModelNum;
827 	int err;
828 	static int cards_found;
829 
830 	/* lmc_trace(dev, "lmc_init_one in"); */
831 
832 	err = pci_enable_device(pdev);
833 	if (err) {
834 		printk(KERN_ERR "lmc: pci enable failed: %d\n", err);
835 		return err;
836 	}
837 
838 	err = pci_request_regions(pdev, "lmc");
839 	if (err) {
840 		printk(KERN_ERR "lmc: pci_request_region failed\n");
841 		goto err_req_io;
842 	}
843 
844 	/*
845 	 * Allocate our own device structure
846 	 */
847 	sc = kzalloc(sizeof(lmc_softc_t), GFP_KERNEL);
848 	if (!sc) {
849 		err = -ENOMEM;
850 		goto err_kzalloc;
851 	}
852 
853 	dev = alloc_hdlcdev(sc);
854 	if (!dev) {
855 		printk(KERN_ERR "lmc:alloc_netdev for device failed\n");
856 		goto err_hdlcdev;
857 	}
858 
859 
860 	dev->type = ARPHRD_HDLC;
861 	dev_to_hdlc(dev)->xmit = lmc_start_xmit;
862 	dev_to_hdlc(dev)->attach = lmc_attach;
863 	dev->netdev_ops = &lmc_ops;
864 	dev->watchdog_timeo = HZ; /* 1 second */
865 	dev->tx_queue_len = 100;
866 	sc->lmc_device = dev;
867 	sc->name = dev->name;
868 	sc->if_type = LMC_PPP;
869 	sc->check = 0xBEAFCAFE;
870 	dev->base_addr = pci_resource_start(pdev, 0);
871 	dev->irq = pdev->irq;
872 	pci_set_drvdata(pdev, dev);
873 	SET_NETDEV_DEV(dev, &pdev->dev);
874 
875 	/*
876 	 * This will get the protocol layer ready and do any 1 time init's
877 	 * Must have a valid sc and dev structure
878 	 */
879 	lmc_proto_attach(sc);
880 
881 	/* Init the spin lock so can call it latter */
882 
883 	spin_lock_init(&sc->lmc_lock);
884 	pci_set_master(pdev);
885 
886 	printk(KERN_INFO "%s: detected at %lx, irq %d\n", dev->name,
887 	       dev->base_addr, dev->irq);
888 
889 	err = register_hdlc_device(dev);
890 	if (err) {
891 		printk(KERN_ERR "%s: register_netdev failed.\n", dev->name);
892 		free_netdev(dev);
893 		goto err_hdlcdev;
894 	}
895 
896     sc->lmc_cardtype = LMC_CARDTYPE_UNKNOWN;
897     sc->lmc_timing = LMC_CTL_CLOCK_SOURCE_EXT;
898 
899     /*
900      *
901      * Check either the subvendor or the subdevice, some systems reverse
902      * the setting in the bois, seems to be version and arch dependent?
903      * Fix the error, exchange the two values
904      */
905     if ((subdevice = pdev->subsystem_device) == PCI_VENDOR_ID_LMC)
906 	    subdevice = pdev->subsystem_vendor;
907 
908     switch (subdevice) {
909     case PCI_DEVICE_ID_LMC_HSSI:
910 	printk(KERN_INFO "%s: LMC HSSI\n", dev->name);
911         sc->lmc_cardtype = LMC_CARDTYPE_HSSI;
912         sc->lmc_media = &lmc_hssi_media;
913         break;
914     case PCI_DEVICE_ID_LMC_DS3:
915 	printk(KERN_INFO "%s: LMC DS3\n", dev->name);
916         sc->lmc_cardtype = LMC_CARDTYPE_DS3;
917         sc->lmc_media = &lmc_ds3_media;
918         break;
919     case PCI_DEVICE_ID_LMC_SSI:
920 	printk(KERN_INFO "%s: LMC SSI\n", dev->name);
921         sc->lmc_cardtype = LMC_CARDTYPE_SSI;
922         sc->lmc_media = &lmc_ssi_media;
923         break;
924     case PCI_DEVICE_ID_LMC_T1:
925 	printk(KERN_INFO "%s: LMC T1\n", dev->name);
926         sc->lmc_cardtype = LMC_CARDTYPE_T1;
927         sc->lmc_media = &lmc_t1_media;
928         break;
929     default:
930 	printk(KERN_WARNING "%s: LMC UNKNOWN CARD!\n", dev->name);
931         break;
932     }
933 
934     lmc_initcsrs (sc, dev->base_addr, 8);
935 
936     lmc_gpio_mkinput (sc, 0xff);
937     sc->lmc_gpio = 0;		/* drive no signals yet */
938 
939     sc->lmc_media->defaults (sc);
940 
941     sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
942 
943     /* verify that the PCI Sub System ID matches the Adapter Model number
944      * from the MII register
945      */
946     AdapModelNum = (lmc_mii_readreg (sc, 0, 3) & 0x3f0) >> 4;
947 
948     if ((AdapModelNum != LMC_ADAP_T1 || /* detect LMC1200 */
949 	 subdevice != PCI_DEVICE_ID_LMC_T1) &&
950 	(AdapModelNum != LMC_ADAP_SSI || /* detect LMC1000 */
951 	 subdevice != PCI_DEVICE_ID_LMC_SSI) &&
952 	(AdapModelNum != LMC_ADAP_DS3 || /* detect LMC5245 */
953 	 subdevice != PCI_DEVICE_ID_LMC_DS3) &&
954 	(AdapModelNum != LMC_ADAP_HSSI || /* detect LMC5200 */
955 	 subdevice != PCI_DEVICE_ID_LMC_HSSI))
956 	    printk(KERN_WARNING "%s: Model number (%d) miscompare for PCI"
957 		   " Subsystem ID = 0x%04x\n",
958 		   dev->name, AdapModelNum, subdevice);
959 
960     /*
961      * reset clock
962      */
963     LMC_CSR_WRITE (sc, csr_gp_timer, 0xFFFFFFFFUL);
964 
965     sc->board_idx = cards_found++;
966     sc->extra_stats.check = STATCHECK;
967     sc->extra_stats.version_size = (DRIVER_VERSION << 16) +
968 	    sizeof(sc->lmc_device->stats) + sizeof(sc->extra_stats);
969     sc->extra_stats.lmc_cardtype = sc->lmc_cardtype;
970 
971     sc->lmc_ok = 0;
972     sc->last_link_status = 0;
973 
974     lmc_trace(dev, "lmc_init_one out");
975     return 0;
976 
977 err_hdlcdev:
978 	pci_set_drvdata(pdev, NULL);
979 	kfree(sc);
980 err_kzalloc:
981 	pci_release_regions(pdev);
982 err_req_io:
983 	pci_disable_device(pdev);
984 	return err;
985 }
986 
987 /*
988  * Called from pci when removing module.
989  */
lmc_remove_one(struct pci_dev * pdev)990 static void __devexit lmc_remove_one(struct pci_dev *pdev)
991 {
992 	struct net_device *dev = pci_get_drvdata(pdev);
993 
994 	if (dev) {
995 		printk(KERN_DEBUG "%s: removing...\n", dev->name);
996 		unregister_hdlc_device(dev);
997 		free_netdev(dev);
998 		pci_release_regions(pdev);
999 		pci_disable_device(pdev);
1000 		pci_set_drvdata(pdev, NULL);
1001 	}
1002 }
1003 
1004 /* After this is called, packets can be sent.
1005  * Does not initialize the addresses
1006  */
lmc_open(struct net_device * dev)1007 static int lmc_open(struct net_device *dev)
1008 {
1009     lmc_softc_t *sc = dev_to_sc(dev);
1010     int err;
1011 
1012     lmc_trace(dev, "lmc_open in");
1013 
1014     lmc_led_on(sc, LMC_DS3_LED0);
1015 
1016     lmc_dec_reset(sc);
1017     lmc_reset(sc);
1018 
1019     LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ(sc, csr_status), 0);
1020     LMC_EVENT_LOG(LMC_EVENT_RESET2, lmc_mii_readreg(sc, 0, 16),
1021 		  lmc_mii_readreg(sc, 0, 17));
1022 
1023     if (sc->lmc_ok){
1024         lmc_trace(dev, "lmc_open lmc_ok out");
1025         return 0;
1026     }
1027 
1028     lmc_softreset (sc);
1029 
1030     /* Since we have to use PCI bus, this should work on x86,alpha,ppc */
1031     if (request_irq (dev->irq, lmc_interrupt, IRQF_SHARED, dev->name, dev)){
1032         printk(KERN_WARNING "%s: could not get irq: %d\n", dev->name, dev->irq);
1033         lmc_trace(dev, "lmc_open irq failed out");
1034         return -EAGAIN;
1035     }
1036     sc->got_irq = 1;
1037 
1038     /* Assert Terminal Active */
1039     sc->lmc_miireg16 |= LMC_MII16_LED_ALL;
1040     sc->lmc_media->set_link_status (sc, LMC_LINK_UP);
1041 
1042     /*
1043      * reset to last state.
1044      */
1045     sc->lmc_media->set_status (sc, NULL);
1046 
1047     /* setup default bits to be used in tulip_desc_t transmit descriptor
1048      * -baz */
1049     sc->TxDescriptControlInit = (
1050                                  LMC_TDES_INTERRUPT_ON_COMPLETION
1051                                  | LMC_TDES_FIRST_SEGMENT
1052                                  | LMC_TDES_LAST_SEGMENT
1053                                  | LMC_TDES_SECOND_ADDR_CHAINED
1054                                  | LMC_TDES_DISABLE_PADDING
1055                                 );
1056 
1057     if (sc->ictl.crc_length == LMC_CTL_CRC_LENGTH_16) {
1058         /* disable 32 bit CRC generated by ASIC */
1059         sc->TxDescriptControlInit |= LMC_TDES_ADD_CRC_DISABLE;
1060     }
1061     sc->lmc_media->set_crc_length(sc, sc->ictl.crc_length);
1062     /* Acknoledge the Terminal Active and light LEDs */
1063 
1064     /* dev->flags |= IFF_UP; */
1065 
1066     if ((err = lmc_proto_open(sc)) != 0)
1067 	    return err;
1068 
1069     netif_start_queue(dev);
1070     sc->extra_stats.tx_tbusy0++;
1071 
1072     /*
1073      * select what interrupts we want to get
1074      */
1075     sc->lmc_intrmask = 0;
1076     /* Should be using the default interrupt mask defined in the .h file. */
1077     sc->lmc_intrmask |= (TULIP_STS_NORMALINTR
1078                          | TULIP_STS_RXINTR
1079                          | TULIP_STS_TXINTR
1080                          | TULIP_STS_ABNRMLINTR
1081                          | TULIP_STS_SYSERROR
1082                          | TULIP_STS_TXSTOPPED
1083                          | TULIP_STS_TXUNDERFLOW
1084                          | TULIP_STS_RXSTOPPED
1085 		         | TULIP_STS_RXNOBUF
1086                         );
1087     LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1088 
1089     sc->lmc_cmdmode |= TULIP_CMD_TXRUN;
1090     sc->lmc_cmdmode |= TULIP_CMD_RXRUN;
1091     LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1092 
1093     sc->lmc_ok = 1; /* Run watchdog */
1094 
1095     /*
1096      * Set the if up now - pfb
1097      */
1098 
1099     sc->last_link_status = 1;
1100 
1101     /*
1102      * Setup a timer for the watchdog on probe, and start it running.
1103      * Since lmc_ok == 0, it will be a NOP for now.
1104      */
1105     init_timer (&sc->timer);
1106     sc->timer.expires = jiffies + HZ;
1107     sc->timer.data = (unsigned long) dev;
1108     sc->timer.function = lmc_watchdog;
1109     add_timer (&sc->timer);
1110 
1111     lmc_trace(dev, "lmc_open out");
1112 
1113     return 0;
1114 }
1115 
1116 /* Total reset to compensate for the AdTran DSU doing bad things
1117  *  under heavy load
1118  */
1119 
lmc_running_reset(struct net_device * dev)1120 static void lmc_running_reset (struct net_device *dev) /*fold00*/
1121 {
1122     lmc_softc_t *sc = dev_to_sc(dev);
1123 
1124     lmc_trace(dev, "lmc_runnig_reset in");
1125 
1126     /* stop interrupts */
1127     /* Clear the interrupt mask */
1128     LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1129 
1130     lmc_dec_reset (sc);
1131     lmc_reset (sc);
1132     lmc_softreset (sc);
1133     /* sc->lmc_miireg16 |= LMC_MII16_LED_ALL; */
1134     sc->lmc_media->set_link_status (sc, 1);
1135     sc->lmc_media->set_status (sc, NULL);
1136 
1137     netif_wake_queue(dev);
1138 
1139     sc->lmc_txfull = 0;
1140     sc->extra_stats.tx_tbusy0++;
1141 
1142     sc->lmc_intrmask = TULIP_DEFAULT_INTR_MASK;
1143     LMC_CSR_WRITE (sc, csr_intr, sc->lmc_intrmask);
1144 
1145     sc->lmc_cmdmode |= (TULIP_CMD_TXRUN | TULIP_CMD_RXRUN);
1146     LMC_CSR_WRITE (sc, csr_command, sc->lmc_cmdmode);
1147 
1148     lmc_trace(dev, "lmc_runnin_reset_out");
1149 }
1150 
1151 
1152 /* This is what is called when you ifconfig down a device.
1153  * This disables the timer for the watchdog and keepalives,
1154  * and disables the irq for dev.
1155  */
lmc_close(struct net_device * dev)1156 static int lmc_close(struct net_device *dev)
1157 {
1158     /* not calling release_region() as we should */
1159     lmc_softc_t *sc = dev_to_sc(dev);
1160 
1161     lmc_trace(dev, "lmc_close in");
1162 
1163     sc->lmc_ok = 0;
1164     sc->lmc_media->set_link_status (sc, 0);
1165     del_timer (&sc->timer);
1166     lmc_proto_close(sc);
1167     lmc_ifdown (dev);
1168 
1169     lmc_trace(dev, "lmc_close out");
1170 
1171     return 0;
1172 }
1173 
1174 /* Ends the transfer of packets */
1175 /* When the interface goes down, this is called */
lmc_ifdown(struct net_device * dev)1176 static int lmc_ifdown (struct net_device *dev) /*fold00*/
1177 {
1178     lmc_softc_t *sc = dev_to_sc(dev);
1179     u32 csr6;
1180     int i;
1181 
1182     lmc_trace(dev, "lmc_ifdown in");
1183 
1184     /* Don't let anything else go on right now */
1185     //    dev->start = 0;
1186     netif_stop_queue(dev);
1187     sc->extra_stats.tx_tbusy1++;
1188 
1189     /* stop interrupts */
1190     /* Clear the interrupt mask */
1191     LMC_CSR_WRITE (sc, csr_intr, 0x00000000);
1192 
1193     /* Stop Tx and Rx on the chip */
1194     csr6 = LMC_CSR_READ (sc, csr_command);
1195     csr6 &= ~LMC_DEC_ST;		/* Turn off the Transmission bit */
1196     csr6 &= ~LMC_DEC_SR;		/* Turn off the Receive bit */
1197     LMC_CSR_WRITE (sc, csr_command, csr6);
1198 
1199     sc->lmc_device->stats.rx_missed_errors +=
1200 	    LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1201 
1202     /* release the interrupt */
1203     if(sc->got_irq == 1){
1204         free_irq (dev->irq, dev);
1205         sc->got_irq = 0;
1206     }
1207 
1208     /* free skbuffs in the Rx queue */
1209     for (i = 0; i < LMC_RXDESCS; i++)
1210     {
1211         struct sk_buff *skb = sc->lmc_rxq[i];
1212         sc->lmc_rxq[i] = NULL;
1213         sc->lmc_rxring[i].status = 0;
1214         sc->lmc_rxring[i].length = 0;
1215         sc->lmc_rxring[i].buffer1 = 0xDEADBEEF;
1216         if (skb != NULL)
1217             dev_kfree_skb(skb);
1218         sc->lmc_rxq[i] = NULL;
1219     }
1220 
1221     for (i = 0; i < LMC_TXDESCS; i++)
1222     {
1223         if (sc->lmc_txq[i] != NULL)
1224             dev_kfree_skb(sc->lmc_txq[i]);
1225         sc->lmc_txq[i] = NULL;
1226     }
1227 
1228     lmc_led_off (sc, LMC_MII16_LED_ALL);
1229 
1230     netif_wake_queue(dev);
1231     sc->extra_stats.tx_tbusy0++;
1232 
1233     lmc_trace(dev, "lmc_ifdown out");
1234 
1235     return 0;
1236 }
1237 
1238 /* Interrupt handling routine.  This will take an incoming packet, or clean
1239  * up after a trasmit.
1240  */
lmc_interrupt(int irq,void * dev_instance)1241 static irqreturn_t lmc_interrupt (int irq, void *dev_instance) /*fold00*/
1242 {
1243     struct net_device *dev = (struct net_device *) dev_instance;
1244     lmc_softc_t *sc = dev_to_sc(dev);
1245     u32 csr;
1246     int i;
1247     s32 stat;
1248     unsigned int badtx;
1249     u32 firstcsr;
1250     int max_work = LMC_RXDESCS;
1251     int handled = 0;
1252 
1253     lmc_trace(dev, "lmc_interrupt in");
1254 
1255     spin_lock(&sc->lmc_lock);
1256 
1257     /*
1258      * Read the csr to find what interrupts we have (if any)
1259      */
1260     csr = LMC_CSR_READ (sc, csr_status);
1261 
1262     /*
1263      * Make sure this is our interrupt
1264      */
1265     if ( ! (csr & sc->lmc_intrmask)) {
1266         goto lmc_int_fail_out;
1267     }
1268 
1269     firstcsr = csr;
1270 
1271     /* always go through this loop at least once */
1272     while (csr & sc->lmc_intrmask) {
1273 	handled = 1;
1274 
1275         /*
1276          * Clear interrupt bits, we handle all case below
1277          */
1278         LMC_CSR_WRITE (sc, csr_status, csr);
1279 
1280         /*
1281          * One of
1282          *  - Transmit process timed out CSR5<1>
1283          *  - Transmit jabber timeout    CSR5<3>
1284          *  - Transmit underflow         CSR5<5>
1285          *  - Transmit Receiver buffer unavailable CSR5<7>
1286          *  - Receive process stopped    CSR5<8>
1287          *  - Receive watchdog timeout   CSR5<9>
1288          *  - Early transmit interrupt   CSR5<10>
1289          *
1290          * Is this really right? Should we do a running reset for jabber?
1291          * (being a WAN card and all)
1292          */
1293         if (csr & TULIP_STS_ABNRMLINTR){
1294             lmc_running_reset (dev);
1295             break;
1296         }
1297 
1298         if (csr & TULIP_STS_RXINTR){
1299             lmc_trace(dev, "rx interrupt");
1300             lmc_rx (dev);
1301 
1302         }
1303         if (csr & (TULIP_STS_TXINTR | TULIP_STS_TXNOBUF | TULIP_STS_TXSTOPPED)) {
1304 
1305 	    int		n_compl = 0 ;
1306             /* reset the transmit timeout detection flag -baz */
1307 	    sc->extra_stats.tx_NoCompleteCnt = 0;
1308 
1309             badtx = sc->lmc_taint_tx;
1310             i = badtx % LMC_TXDESCS;
1311 
1312             while ((badtx < sc->lmc_next_tx)) {
1313                 stat = sc->lmc_txring[i].status;
1314 
1315                 LMC_EVENT_LOG (LMC_EVENT_XMTINT, stat,
1316 						 sc->lmc_txring[i].length);
1317                 /*
1318                  * If bit 31 is 1 the tulip owns it break out of the loop
1319                  */
1320                 if (stat & 0x80000000)
1321                     break;
1322 
1323 		n_compl++ ;		/* i.e., have an empty slot in ring */
1324                 /*
1325                  * If we have no skbuff or have cleared it
1326                  * Already continue to the next buffer
1327                  */
1328                 if (sc->lmc_txq[i] == NULL)
1329                     continue;
1330 
1331 		/*
1332 		 * Check the total error summary to look for any errors
1333 		 */
1334 		if (stat & 0x8000) {
1335 			sc->lmc_device->stats.tx_errors++;
1336 			if (stat & 0x4104)
1337 				sc->lmc_device->stats.tx_aborted_errors++;
1338 			if (stat & 0x0C00)
1339 				sc->lmc_device->stats.tx_carrier_errors++;
1340 			if (stat & 0x0200)
1341 				sc->lmc_device->stats.tx_window_errors++;
1342 			if (stat & 0x0002)
1343 				sc->lmc_device->stats.tx_fifo_errors++;
1344 		} else {
1345 			sc->lmc_device->stats.tx_bytes += sc->lmc_txring[i].length & 0x7ff;
1346 
1347 			sc->lmc_device->stats.tx_packets++;
1348                 }
1349 
1350                 //                dev_kfree_skb(sc->lmc_txq[i]);
1351                 dev_kfree_skb_irq(sc->lmc_txq[i]);
1352                 sc->lmc_txq[i] = NULL;
1353 
1354                 badtx++;
1355                 i = badtx % LMC_TXDESCS;
1356             }
1357 
1358             if (sc->lmc_next_tx - badtx > LMC_TXDESCS)
1359             {
1360                 printk ("%s: out of sync pointer\n", dev->name);
1361                 badtx += LMC_TXDESCS;
1362             }
1363             LMC_EVENT_LOG(LMC_EVENT_TBUSY0, n_compl, 0);
1364             sc->lmc_txfull = 0;
1365             netif_wake_queue(dev);
1366 	    sc->extra_stats.tx_tbusy0++;
1367 
1368 
1369 #ifdef DEBUG
1370 	    sc->extra_stats.dirtyTx = badtx;
1371 	    sc->extra_stats.lmc_next_tx = sc->lmc_next_tx;
1372 	    sc->extra_stats.lmc_txfull = sc->lmc_txfull;
1373 #endif
1374             sc->lmc_taint_tx = badtx;
1375 
1376             /*
1377              * Why was there a break here???
1378              */
1379         }			/* end handle transmit interrupt */
1380 
1381         if (csr & TULIP_STS_SYSERROR) {
1382             u32 error;
1383             printk (KERN_WARNING "%s: system bus error csr: %#8.8x\n", dev->name, csr);
1384             error = csr>>23 & 0x7;
1385             switch(error){
1386             case 0x000:
1387                 printk(KERN_WARNING "%s: Parity Fault (bad)\n", dev->name);
1388                 break;
1389             case 0x001:
1390                 printk(KERN_WARNING "%s: Master Abort (naughty)\n", dev->name);
1391                 break;
1392             case 0x010:
1393                 printk(KERN_WARNING "%s: Target Abort (not so naughty)\n", dev->name);
1394                 break;
1395             default:
1396                 printk(KERN_WARNING "%s: This bus error code was supposed to be reserved!\n", dev->name);
1397             }
1398             lmc_dec_reset (sc);
1399             lmc_reset (sc);
1400             LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
1401             LMC_EVENT_LOG(LMC_EVENT_RESET2,
1402                           lmc_mii_readreg (sc, 0, 16),
1403                           lmc_mii_readreg (sc, 0, 17));
1404 
1405         }
1406 
1407 
1408         if(max_work-- <= 0)
1409             break;
1410 
1411         /*
1412          * Get current csr status to make sure
1413          * we've cleared all interrupts
1414          */
1415         csr = LMC_CSR_READ (sc, csr_status);
1416     }				/* end interrupt loop */
1417     LMC_EVENT_LOG(LMC_EVENT_INT, firstcsr, csr);
1418 
1419 lmc_int_fail_out:
1420 
1421     spin_unlock(&sc->lmc_lock);
1422 
1423     lmc_trace(dev, "lmc_interrupt out");
1424     return IRQ_RETVAL(handled);
1425 }
1426 
lmc_start_xmit(struct sk_buff * skb,struct net_device * dev)1427 static netdev_tx_t lmc_start_xmit(struct sk_buff *skb,
1428 					struct net_device *dev)
1429 {
1430     lmc_softc_t *sc = dev_to_sc(dev);
1431     u32 flag;
1432     int entry;
1433     unsigned long flags;
1434 
1435     lmc_trace(dev, "lmc_start_xmit in");
1436 
1437     spin_lock_irqsave(&sc->lmc_lock, flags);
1438 
1439     /* normal path, tbusy known to be zero */
1440 
1441     entry = sc->lmc_next_tx % LMC_TXDESCS;
1442 
1443     sc->lmc_txq[entry] = skb;
1444     sc->lmc_txring[entry].buffer1 = virt_to_bus (skb->data);
1445 
1446     LMC_CONSOLE_LOG("xmit", skb->data, skb->len);
1447 
1448 #ifndef GCOM
1449     /* If the queue is less than half full, don't interrupt */
1450     if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS / 2)
1451     {
1452         /* Do not interrupt on completion of this packet */
1453         flag = 0x60000000;
1454         netif_wake_queue(dev);
1455     }
1456     else if (sc->lmc_next_tx - sc->lmc_taint_tx == LMC_TXDESCS / 2)
1457     {
1458         /* This generates an interrupt on completion of this packet */
1459         flag = 0xe0000000;
1460         netif_wake_queue(dev);
1461     }
1462     else if (sc->lmc_next_tx - sc->lmc_taint_tx < LMC_TXDESCS - 1)
1463     {
1464         /* Do not interrupt on completion of this packet */
1465         flag = 0x60000000;
1466         netif_wake_queue(dev);
1467     }
1468     else
1469     {
1470         /* This generates an interrupt on completion of this packet */
1471         flag = 0xe0000000;
1472         sc->lmc_txfull = 1;
1473         netif_stop_queue(dev);
1474     }
1475 #else
1476     flag = LMC_TDES_INTERRUPT_ON_COMPLETION;
1477 
1478     if (sc->lmc_next_tx - sc->lmc_taint_tx >= LMC_TXDESCS - 1)
1479     {				/* ring full, go busy */
1480         sc->lmc_txfull = 1;
1481 	netif_stop_queue(dev);
1482 	sc->extra_stats.tx_tbusy1++;
1483         LMC_EVENT_LOG(LMC_EVENT_TBUSY1, entry, 0);
1484     }
1485 #endif
1486 
1487 
1488     if (entry == LMC_TXDESCS - 1)	/* last descriptor in ring */
1489 	flag |= LMC_TDES_END_OF_RING;	/* flag as such for Tulip */
1490 
1491     /* don't pad small packets either */
1492     flag = sc->lmc_txring[entry].length = (skb->len) | flag |
1493 						sc->TxDescriptControlInit;
1494 
1495     /* set the transmit timeout flag to be checked in
1496      * the watchdog timer handler. -baz
1497      */
1498 
1499     sc->extra_stats.tx_NoCompleteCnt++;
1500     sc->lmc_next_tx++;
1501 
1502     /* give ownership to the chip */
1503     LMC_EVENT_LOG(LMC_EVENT_XMT, flag, entry);
1504     sc->lmc_txring[entry].status = 0x80000000;
1505 
1506     /* send now! */
1507     LMC_CSR_WRITE (sc, csr_txpoll, 0);
1508 
1509     spin_unlock_irqrestore(&sc->lmc_lock, flags);
1510 
1511     lmc_trace(dev, "lmc_start_xmit_out");
1512     return NETDEV_TX_OK;
1513 }
1514 
1515 
lmc_rx(struct net_device * dev)1516 static int lmc_rx(struct net_device *dev)
1517 {
1518     lmc_softc_t *sc = dev_to_sc(dev);
1519     int i;
1520     int rx_work_limit = LMC_RXDESCS;
1521     unsigned int next_rx;
1522     int rxIntLoopCnt;		/* debug -baz */
1523     int localLengthErrCnt = 0;
1524     long stat;
1525     struct sk_buff *skb, *nsb;
1526     u16 len;
1527 
1528     lmc_trace(dev, "lmc_rx in");
1529 
1530     lmc_led_on(sc, LMC_DS3_LED3);
1531 
1532     rxIntLoopCnt = 0;		/* debug -baz */
1533 
1534     i = sc->lmc_next_rx % LMC_RXDESCS;
1535     next_rx = sc->lmc_next_rx;
1536 
1537     while (((stat = sc->lmc_rxring[i].status) & LMC_RDES_OWN_BIT) != DESC_OWNED_BY_DC21X4)
1538     {
1539         rxIntLoopCnt++;		/* debug -baz */
1540         len = ((stat & LMC_RDES_FRAME_LENGTH) >> RDES_FRAME_LENGTH_BIT_NUMBER);
1541         if ((stat & 0x0300) != 0x0300) {  /* Check first segment and last segment */
1542 		if ((stat & 0x0000ffff) != 0x7fff) {
1543 			/* Oversized frame */
1544 			sc->lmc_device->stats.rx_length_errors++;
1545 			goto skip_packet;
1546 		}
1547 	}
1548 
1549 	if (stat & 0x00000008) { /* Catch a dribbling bit error */
1550 		sc->lmc_device->stats.rx_errors++;
1551 		sc->lmc_device->stats.rx_frame_errors++;
1552 		goto skip_packet;
1553 	}
1554 
1555 
1556 	if (stat & 0x00000004) { /* Catch a CRC error by the Xilinx */
1557 		sc->lmc_device->stats.rx_errors++;
1558 		sc->lmc_device->stats.rx_crc_errors++;
1559 		goto skip_packet;
1560 	}
1561 
1562 	if (len > LMC_PKT_BUF_SZ) {
1563 		sc->lmc_device->stats.rx_length_errors++;
1564 		localLengthErrCnt++;
1565 		goto skip_packet;
1566 	}
1567 
1568 	if (len < sc->lmc_crcSize + 2) {
1569 		sc->lmc_device->stats.rx_length_errors++;
1570 		sc->extra_stats.rx_SmallPktCnt++;
1571 		localLengthErrCnt++;
1572 		goto skip_packet;
1573 	}
1574 
1575         if(stat & 0x00004000){
1576             printk(KERN_WARNING "%s: Receiver descriptor error, receiver out of sync?\n", dev->name);
1577         }
1578 
1579         len -= sc->lmc_crcSize;
1580 
1581         skb = sc->lmc_rxq[i];
1582 
1583         /*
1584          * We ran out of memory at some point
1585          * just allocate an skb buff and continue.
1586          */
1587 
1588         if (!skb) {
1589             nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1590             if (nsb) {
1591                 sc->lmc_rxq[i] = nsb;
1592                 nsb->dev = dev;
1593                 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1594             }
1595             sc->failed_recv_alloc = 1;
1596             goto skip_packet;
1597         }
1598 
1599 	sc->lmc_device->stats.rx_packets++;
1600 	sc->lmc_device->stats.rx_bytes += len;
1601 
1602         LMC_CONSOLE_LOG("recv", skb->data, len);
1603 
1604         /*
1605          * I'm not sure of the sanity of this
1606          * Packets could be arriving at a constant
1607          * 44.210mbits/sec and we're going to copy
1608          * them into a new buffer??
1609          */
1610 
1611         if(len > (LMC_MTU - (LMC_MTU>>2))){ /* len > LMC_MTU * 0.75 */
1612             /*
1613              * If it's a large packet don't copy it just hand it up
1614              */
1615         give_it_anyways:
1616 
1617             sc->lmc_rxq[i] = NULL;
1618             sc->lmc_rxring[i].buffer1 = 0x0;
1619 
1620             skb_put (skb, len);
1621             skb->protocol = lmc_proto_type(sc, skb);
1622             skb_reset_mac_header(skb);
1623             /* skb_reset_network_header(skb); */
1624             skb->dev = dev;
1625             lmc_proto_netif(sc, skb);
1626 
1627             /*
1628              * This skb will be destroyed by the upper layers, make a new one
1629              */
1630             nsb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1631             if (nsb) {
1632                 sc->lmc_rxq[i] = nsb;
1633                 nsb->dev = dev;
1634                 sc->lmc_rxring[i].buffer1 = virt_to_bus(skb_tail_pointer(nsb));
1635                 /* Transferred to 21140 below */
1636             }
1637             else {
1638                 /*
1639                  * We've run out of memory, stop trying to allocate
1640                  * memory and exit the interrupt handler
1641                  *
1642                  * The chip may run out of receivers and stop
1643                  * in which care we'll try to allocate the buffer
1644                  * again.  (once a second)
1645                  */
1646 		sc->extra_stats.rx_BuffAllocErr++;
1647                 LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1648                 sc->failed_recv_alloc = 1;
1649                 goto skip_out_of_mem;
1650             }
1651         }
1652         else {
1653             nsb = dev_alloc_skb(len);
1654             if(!nsb) {
1655                 goto give_it_anyways;
1656             }
1657             skb_copy_from_linear_data(skb, skb_put(nsb, len), len);
1658 
1659             nsb->protocol = lmc_proto_type(sc, nsb);
1660             skb_reset_mac_header(nsb);
1661             /* skb_reset_network_header(nsb); */
1662             nsb->dev = dev;
1663             lmc_proto_netif(sc, nsb);
1664         }
1665 
1666     skip_packet:
1667         LMC_EVENT_LOG(LMC_EVENT_RCVINT, stat, len);
1668         sc->lmc_rxring[i].status = DESC_OWNED_BY_DC21X4;
1669 
1670         sc->lmc_next_rx++;
1671         i = sc->lmc_next_rx % LMC_RXDESCS;
1672         rx_work_limit--;
1673         if (rx_work_limit < 0)
1674             break;
1675     }
1676 
1677     /* detect condition for LMC1000 where DSU cable attaches and fills
1678      * descriptors with bogus packets
1679      *
1680     if (localLengthErrCnt > LMC_RXDESCS - 3) {
1681 	sc->extra_stats.rx_BadPktSurgeCnt++;
1682 	LMC_EVENT_LOG(LMC_EVENT_BADPKTSURGE, localLengthErrCnt,
1683 		      sc->extra_stats.rx_BadPktSurgeCnt);
1684     } */
1685 
1686     /* save max count of receive descriptors serviced */
1687     if (rxIntLoopCnt > sc->extra_stats.rxIntLoopCnt)
1688 	    sc->extra_stats.rxIntLoopCnt = rxIntLoopCnt; /* debug -baz */
1689 
1690 #ifdef DEBUG
1691     if (rxIntLoopCnt == 0)
1692     {
1693         for (i = 0; i < LMC_RXDESCS; i++)
1694         {
1695             if ((sc->lmc_rxring[i].status & LMC_RDES_OWN_BIT)
1696                 != DESC_OWNED_BY_DC21X4)
1697             {
1698                 rxIntLoopCnt++;
1699             }
1700         }
1701         LMC_EVENT_LOG(LMC_EVENT_RCVEND, rxIntLoopCnt, 0);
1702     }
1703 #endif
1704 
1705 
1706     lmc_led_off(sc, LMC_DS3_LED3);
1707 
1708 skip_out_of_mem:
1709 
1710     lmc_trace(dev, "lmc_rx out");
1711 
1712     return 0;
1713 }
1714 
lmc_get_stats(struct net_device * dev)1715 static struct net_device_stats *lmc_get_stats(struct net_device *dev)
1716 {
1717     lmc_softc_t *sc = dev_to_sc(dev);
1718     unsigned long flags;
1719 
1720     lmc_trace(dev, "lmc_get_stats in");
1721 
1722     spin_lock_irqsave(&sc->lmc_lock, flags);
1723 
1724     sc->lmc_device->stats.rx_missed_errors += LMC_CSR_READ(sc, csr_missed_frames) & 0xffff;
1725 
1726     spin_unlock_irqrestore(&sc->lmc_lock, flags);
1727 
1728     lmc_trace(dev, "lmc_get_stats out");
1729 
1730     return &sc->lmc_device->stats;
1731 }
1732 
1733 static struct pci_driver lmc_driver = {
1734 	.name		= "lmc",
1735 	.id_table	= lmc_pci_tbl,
1736 	.probe		= lmc_init_one,
1737 	.remove		= __devexit_p(lmc_remove_one),
1738 };
1739 
init_lmc(void)1740 static int __init init_lmc(void)
1741 {
1742     return pci_register_driver(&lmc_driver);
1743 }
1744 
exit_lmc(void)1745 static void __exit exit_lmc(void)
1746 {
1747     pci_unregister_driver(&lmc_driver);
1748 }
1749 
1750 module_init(init_lmc);
1751 module_exit(exit_lmc);
1752 
lmc_mii_readreg(lmc_softc_t * const sc,unsigned devaddr,unsigned regno)1753 unsigned lmc_mii_readreg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno) /*fold00*/
1754 {
1755     int i;
1756     int command = (0xf6 << 10) | (devaddr << 5) | regno;
1757     int retval = 0;
1758 
1759     lmc_trace(sc->lmc_device, "lmc_mii_readreg in");
1760 
1761     LMC_MII_SYNC (sc);
1762 
1763     lmc_trace(sc->lmc_device, "lmc_mii_readreg: done sync");
1764 
1765     for (i = 15; i >= 0; i--)
1766     {
1767         int dataval = (command & (1 << i)) ? 0x20000 : 0;
1768 
1769         LMC_CSR_WRITE (sc, csr_9, dataval);
1770         lmc_delay ();
1771         /* __SLOW_DOWN_IO; */
1772         LMC_CSR_WRITE (sc, csr_9, dataval | 0x10000);
1773         lmc_delay ();
1774         /* __SLOW_DOWN_IO; */
1775     }
1776 
1777     lmc_trace(sc->lmc_device, "lmc_mii_readreg: done1");
1778 
1779     for (i = 19; i > 0; i--)
1780     {
1781         LMC_CSR_WRITE (sc, csr_9, 0x40000);
1782         lmc_delay ();
1783         /* __SLOW_DOWN_IO; */
1784         retval = (retval << 1) | ((LMC_CSR_READ (sc, csr_9) & 0x80000) ? 1 : 0);
1785         LMC_CSR_WRITE (sc, csr_9, 0x40000 | 0x10000);
1786         lmc_delay ();
1787         /* __SLOW_DOWN_IO; */
1788     }
1789 
1790     lmc_trace(sc->lmc_device, "lmc_mii_readreg out");
1791 
1792     return (retval >> 1) & 0xffff;
1793 }
1794 
lmc_mii_writereg(lmc_softc_t * const sc,unsigned devaddr,unsigned regno,unsigned data)1795 void lmc_mii_writereg (lmc_softc_t * const sc, unsigned devaddr, unsigned regno, unsigned data) /*fold00*/
1796 {
1797     int i = 32;
1798     int command = (0x5002 << 16) | (devaddr << 23) | (regno << 18) | data;
1799 
1800     lmc_trace(sc->lmc_device, "lmc_mii_writereg in");
1801 
1802     LMC_MII_SYNC (sc);
1803 
1804     i = 31;
1805     while (i >= 0)
1806     {
1807         int datav;
1808 
1809         if (command & (1 << i))
1810             datav = 0x20000;
1811         else
1812             datav = 0x00000;
1813 
1814         LMC_CSR_WRITE (sc, csr_9, datav);
1815         lmc_delay ();
1816         /* __SLOW_DOWN_IO; */
1817         LMC_CSR_WRITE (sc, csr_9, (datav | 0x10000));
1818         lmc_delay ();
1819         /* __SLOW_DOWN_IO; */
1820         i--;
1821     }
1822 
1823     i = 2;
1824     while (i > 0)
1825     {
1826         LMC_CSR_WRITE (sc, csr_9, 0x40000);
1827         lmc_delay ();
1828         /* __SLOW_DOWN_IO; */
1829         LMC_CSR_WRITE (sc, csr_9, 0x50000);
1830         lmc_delay ();
1831         /* __SLOW_DOWN_IO; */
1832         i--;
1833     }
1834 
1835     lmc_trace(sc->lmc_device, "lmc_mii_writereg out");
1836 }
1837 
lmc_softreset(lmc_softc_t * const sc)1838 static void lmc_softreset (lmc_softc_t * const sc) /*fold00*/
1839 {
1840     int i;
1841 
1842     lmc_trace(sc->lmc_device, "lmc_softreset in");
1843 
1844     /* Initialize the receive rings and buffers. */
1845     sc->lmc_txfull = 0;
1846     sc->lmc_next_rx = 0;
1847     sc->lmc_next_tx = 0;
1848     sc->lmc_taint_rx = 0;
1849     sc->lmc_taint_tx = 0;
1850 
1851     /*
1852      * Setup each one of the receiver buffers
1853      * allocate an skbuff for each one, setup the descriptor table
1854      * and point each buffer at the next one
1855      */
1856 
1857     for (i = 0; i < LMC_RXDESCS; i++)
1858     {
1859         struct sk_buff *skb;
1860 
1861         if (sc->lmc_rxq[i] == NULL)
1862         {
1863             skb = dev_alloc_skb (LMC_PKT_BUF_SZ + 2);
1864             if(skb == NULL){
1865                 printk(KERN_WARNING "%s: Failed to allocate receiver ring, will try again\n", sc->name);
1866                 sc->failed_ring = 1;
1867                 break;
1868             }
1869             else{
1870                 sc->lmc_rxq[i] = skb;
1871             }
1872         }
1873         else
1874         {
1875             skb = sc->lmc_rxq[i];
1876         }
1877 
1878         skb->dev = sc->lmc_device;
1879 
1880         /* owned by 21140 */
1881         sc->lmc_rxring[i].status = 0x80000000;
1882 
1883         /* used to be PKT_BUF_SZ now uses skb since we lose some to head room */
1884         sc->lmc_rxring[i].length = skb_tailroom(skb);
1885 
1886         /* use to be tail which is dumb since you're thinking why write
1887          * to the end of the packj,et but since there's nothing there tail == data
1888          */
1889         sc->lmc_rxring[i].buffer1 = virt_to_bus (skb->data);
1890 
1891         /* This is fair since the structure is static and we have the next address */
1892         sc->lmc_rxring[i].buffer2 = virt_to_bus (&sc->lmc_rxring[i + 1]);
1893 
1894     }
1895 
1896     /*
1897      * Sets end of ring
1898      */
1899     if (i != 0) {
1900         sc->lmc_rxring[i - 1].length |= 0x02000000; /* Set end of buffers flag */
1901         sc->lmc_rxring[i - 1].buffer2 = virt_to_bus(&sc->lmc_rxring[0]); /* Point back to the start */
1902     }
1903     LMC_CSR_WRITE (sc, csr_rxlist, virt_to_bus (sc->lmc_rxring)); /* write base address */
1904 
1905     /* Initialize the transmit rings and buffers */
1906     for (i = 0; i < LMC_TXDESCS; i++)
1907     {
1908         if (sc->lmc_txq[i] != NULL){		/* have buffer */
1909             dev_kfree_skb(sc->lmc_txq[i]);	/* free it */
1910 	    sc->lmc_device->stats.tx_dropped++;	/* We just dropped a packet */
1911         }
1912         sc->lmc_txq[i] = NULL;
1913         sc->lmc_txring[i].status = 0x00000000;
1914         sc->lmc_txring[i].buffer2 = virt_to_bus (&sc->lmc_txring[i + 1]);
1915     }
1916     sc->lmc_txring[i - 1].buffer2 = virt_to_bus (&sc->lmc_txring[0]);
1917     LMC_CSR_WRITE (sc, csr_txlist, virt_to_bus (sc->lmc_txring));
1918 
1919     lmc_trace(sc->lmc_device, "lmc_softreset out");
1920 }
1921 
lmc_gpio_mkinput(lmc_softc_t * const sc,u32 bits)1922 void lmc_gpio_mkinput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1923 {
1924     lmc_trace(sc->lmc_device, "lmc_gpio_mkinput in");
1925     sc->lmc_gpio_io &= ~bits;
1926     LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1927     lmc_trace(sc->lmc_device, "lmc_gpio_mkinput out");
1928 }
1929 
lmc_gpio_mkoutput(lmc_softc_t * const sc,u32 bits)1930 void lmc_gpio_mkoutput(lmc_softc_t * const sc, u32 bits) /*fold00*/
1931 {
1932     lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput in");
1933     sc->lmc_gpio_io |= bits;
1934     LMC_CSR_WRITE(sc, csr_gp, TULIP_GP_PINSET | (sc->lmc_gpio_io));
1935     lmc_trace(sc->lmc_device, "lmc_gpio_mkoutput out");
1936 }
1937 
lmc_led_on(lmc_softc_t * const sc,u32 led)1938 void lmc_led_on(lmc_softc_t * const sc, u32 led) /*fold00*/
1939 {
1940     lmc_trace(sc->lmc_device, "lmc_led_on in");
1941     if((~sc->lmc_miireg16) & led){ /* Already on! */
1942         lmc_trace(sc->lmc_device, "lmc_led_on aon out");
1943         return;
1944     }
1945 
1946     sc->lmc_miireg16 &= ~led;
1947     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1948     lmc_trace(sc->lmc_device, "lmc_led_on out");
1949 }
1950 
lmc_led_off(lmc_softc_t * const sc,u32 led)1951 void lmc_led_off(lmc_softc_t * const sc, u32 led) /*fold00*/
1952 {
1953     lmc_trace(sc->lmc_device, "lmc_led_off in");
1954     if(sc->lmc_miireg16 & led){ /* Already set don't do anything */
1955         lmc_trace(sc->lmc_device, "lmc_led_off aoff out");
1956         return;
1957     }
1958 
1959     sc->lmc_miireg16 |= led;
1960     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1961     lmc_trace(sc->lmc_device, "lmc_led_off out");
1962 }
1963 
lmc_reset(lmc_softc_t * const sc)1964 static void lmc_reset(lmc_softc_t * const sc) /*fold00*/
1965 {
1966     lmc_trace(sc->lmc_device, "lmc_reset in");
1967     sc->lmc_miireg16 |= LMC_MII16_FIFO_RESET;
1968     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1969 
1970     sc->lmc_miireg16 &= ~LMC_MII16_FIFO_RESET;
1971     lmc_mii_writereg(sc, 0, 16, sc->lmc_miireg16);
1972 
1973     /*
1974      * make some of the GPIO pins be outputs
1975      */
1976     lmc_gpio_mkoutput(sc, LMC_GEP_RESET);
1977 
1978     /*
1979      * RESET low to force state reset.  This also forces
1980      * the transmitter clock to be internal, but we expect to reset
1981      * that later anyway.
1982      */
1983     sc->lmc_gpio &= ~(LMC_GEP_RESET);
1984     LMC_CSR_WRITE(sc, csr_gp, sc->lmc_gpio);
1985 
1986     /*
1987      * hold for more than 10 microseconds
1988      */
1989     udelay(50);
1990 
1991     /*
1992      * stop driving Xilinx-related signals
1993      */
1994     lmc_gpio_mkinput(sc, LMC_GEP_RESET);
1995 
1996     /*
1997      * Call media specific init routine
1998      */
1999     sc->lmc_media->init(sc);
2000 
2001     sc->extra_stats.resetCount++;
2002     lmc_trace(sc->lmc_device, "lmc_reset out");
2003 }
2004 
lmc_dec_reset(lmc_softc_t * const sc)2005 static void lmc_dec_reset(lmc_softc_t * const sc) /*fold00*/
2006 {
2007     u32 val;
2008     lmc_trace(sc->lmc_device, "lmc_dec_reset in");
2009 
2010     /*
2011      * disable all interrupts
2012      */
2013     sc->lmc_intrmask = 0;
2014     LMC_CSR_WRITE(sc, csr_intr, sc->lmc_intrmask);
2015 
2016     /*
2017      * Reset the chip with a software reset command.
2018      * Wait 10 microseconds (actually 50 PCI cycles but at
2019      * 33MHz that comes to two microseconds but wait a
2020      * bit longer anyways)
2021      */
2022     LMC_CSR_WRITE(sc, csr_busmode, TULIP_BUSMODE_SWRESET);
2023     udelay(25);
2024 #ifdef __sparc__
2025     sc->lmc_busmode = LMC_CSR_READ(sc, csr_busmode);
2026     sc->lmc_busmode = 0x00100000;
2027     sc->lmc_busmode &= ~TULIP_BUSMODE_SWRESET;
2028     LMC_CSR_WRITE(sc, csr_busmode, sc->lmc_busmode);
2029 #endif
2030     sc->lmc_cmdmode = LMC_CSR_READ(sc, csr_command);
2031 
2032     /*
2033      * We want:
2034      *   no ethernet address in frames we write
2035      *   disable padding (txdesc, padding disable)
2036      *   ignore runt frames (rdes0 bit 15)
2037      *   no receiver watchdog or transmitter jabber timer
2038      *       (csr15 bit 0,14 == 1)
2039      *   if using 16-bit CRC, turn off CRC (trans desc, crc disable)
2040      */
2041 
2042     sc->lmc_cmdmode |= ( TULIP_CMD_PROMISCUOUS
2043                          | TULIP_CMD_FULLDUPLEX
2044                          | TULIP_CMD_PASSBADPKT
2045                          | TULIP_CMD_NOHEARTBEAT
2046                          | TULIP_CMD_PORTSELECT
2047                          | TULIP_CMD_RECEIVEALL
2048                          | TULIP_CMD_MUSTBEONE
2049                        );
2050     sc->lmc_cmdmode &= ~( TULIP_CMD_OPERMODE
2051                           | TULIP_CMD_THRESHOLDCTL
2052                           | TULIP_CMD_STOREFWD
2053                           | TULIP_CMD_TXTHRSHLDCTL
2054                         );
2055 
2056     LMC_CSR_WRITE(sc, csr_command, sc->lmc_cmdmode);
2057 
2058     /*
2059      * disable receiver watchdog and transmit jabber
2060      */
2061     val = LMC_CSR_READ(sc, csr_sia_general);
2062     val |= (TULIP_WATCHDOG_TXDISABLE | TULIP_WATCHDOG_RXDISABLE);
2063     LMC_CSR_WRITE(sc, csr_sia_general, val);
2064 
2065     lmc_trace(sc->lmc_device, "lmc_dec_reset out");
2066 }
2067 
lmc_initcsrs(lmc_softc_t * const sc,lmc_csrptr_t csr_base,size_t csr_size)2068 static void lmc_initcsrs(lmc_softc_t * const sc, lmc_csrptr_t csr_base, /*fold00*/
2069                          size_t csr_size)
2070 {
2071     lmc_trace(sc->lmc_device, "lmc_initcsrs in");
2072     sc->lmc_csrs.csr_busmode	        = csr_base +  0 * csr_size;
2073     sc->lmc_csrs.csr_txpoll		= csr_base +  1 * csr_size;
2074     sc->lmc_csrs.csr_rxpoll		= csr_base +  2 * csr_size;
2075     sc->lmc_csrs.csr_rxlist		= csr_base +  3 * csr_size;
2076     sc->lmc_csrs.csr_txlist		= csr_base +  4 * csr_size;
2077     sc->lmc_csrs.csr_status		= csr_base +  5 * csr_size;
2078     sc->lmc_csrs.csr_command	        = csr_base +  6 * csr_size;
2079     sc->lmc_csrs.csr_intr		= csr_base +  7 * csr_size;
2080     sc->lmc_csrs.csr_missed_frames	= csr_base +  8 * csr_size;
2081     sc->lmc_csrs.csr_9		        = csr_base +  9 * csr_size;
2082     sc->lmc_csrs.csr_10		        = csr_base + 10 * csr_size;
2083     sc->lmc_csrs.csr_11		        = csr_base + 11 * csr_size;
2084     sc->lmc_csrs.csr_12		        = csr_base + 12 * csr_size;
2085     sc->lmc_csrs.csr_13		        = csr_base + 13 * csr_size;
2086     sc->lmc_csrs.csr_14		        = csr_base + 14 * csr_size;
2087     sc->lmc_csrs.csr_15		        = csr_base + 15 * csr_size;
2088     lmc_trace(sc->lmc_device, "lmc_initcsrs out");
2089 }
2090 
lmc_driver_timeout(struct net_device * dev)2091 static void lmc_driver_timeout(struct net_device *dev)
2092 {
2093     lmc_softc_t *sc = dev_to_sc(dev);
2094     u32 csr6;
2095     unsigned long flags;
2096 
2097     lmc_trace(dev, "lmc_driver_timeout in");
2098 
2099     spin_lock_irqsave(&sc->lmc_lock, flags);
2100 
2101     printk("%s: Xmitter busy|\n", dev->name);
2102 
2103     sc->extra_stats.tx_tbusy_calls++;
2104     if (jiffies - dev_trans_start(dev) < TX_TIMEOUT)
2105 	    goto bug_out;
2106 
2107     /*
2108      * Chip seems to have locked up
2109      * Reset it
2110      * This whips out all our decriptor
2111      * table and starts from scartch
2112      */
2113 
2114     LMC_EVENT_LOG(LMC_EVENT_XMTPRCTMO,
2115                   LMC_CSR_READ (sc, csr_status),
2116 		  sc->extra_stats.tx_ProcTimeout);
2117 
2118     lmc_running_reset (dev);
2119 
2120     LMC_EVENT_LOG(LMC_EVENT_RESET1, LMC_CSR_READ (sc, csr_status), 0);
2121     LMC_EVENT_LOG(LMC_EVENT_RESET2,
2122                   lmc_mii_readreg (sc, 0, 16),
2123                   lmc_mii_readreg (sc, 0, 17));
2124 
2125     /* restart the tx processes */
2126     csr6 = LMC_CSR_READ (sc, csr_command);
2127     LMC_CSR_WRITE (sc, csr_command, csr6 | 0x0002);
2128     LMC_CSR_WRITE (sc, csr_command, csr6 | 0x2002);
2129 
2130     /* immediate transmit */
2131     LMC_CSR_WRITE (sc, csr_txpoll, 0);
2132 
2133     sc->lmc_device->stats.tx_errors++;
2134     sc->extra_stats.tx_ProcTimeout++; /* -baz */
2135 
2136     dev->trans_start = jiffies; /* prevent tx timeout */
2137 
2138 bug_out:
2139 
2140     spin_unlock_irqrestore(&sc->lmc_lock, flags);
2141 
2142     lmc_trace(dev, "lmc_driver_timout out");
2143 
2144 
2145 }
2146