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* Allow crc32 to be used at address 0x000
[karo-tx-uboot.git] / cpu / mpc5xxx / fec.c
1 /*
2  * (C) Copyright 2003
3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
4  *
5  * This file is based on mpc4200fec.c,
6  * (C) Copyright Motorola, Inc., 2000
7  */
8
9 #include <common.h>
10 #include <mpc5xxx.h>
11 #include <malloc.h>
12 #include <net.h>
13 #include <miiphy.h>
14 #include "sdma.h"
15 #include "fec.h"
16
17 /* #define DEBUG        0x28 */
18
19 #if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
20         defined(CONFIG_MPC5XXX_FEC)
21
22 #if (DEBUG & 0x60)
23 static void tfifo_print(mpc5xxx_fec_priv *fec);
24 static void rfifo_print(mpc5xxx_fec_priv *fec);
25 #endif /* DEBUG */
26
27 #if (DEBUG & 0x40)
28 static uint32 local_crc32(char *string, unsigned int crc_value, int len);
29 #endif
30
31 typedef struct {
32     uint8 data[1500];           /* actual data */
33     int length;                 /* actual length */
34     int used;                   /* buffer in use or not */
35     uint8 head[16];             /* MAC header(6 + 6 + 2) + 2(aligned) */
36 } NBUF;
37
38 /********************************************************************/
39 static int mpc5xxx_fec_rbd_init(mpc5xxx_fec_priv *fec)
40 {
41         int ix;
42         char *data;
43         static int once = 0;
44
45         for (ix = 0; ix < FEC_RBD_NUM; ix++) {
46                 if (!once) {
47                         data = (char *)malloc(FEC_MAX_PKT_SIZE);
48                         if (data == NULL) {
49                                 printf ("RBD INIT FAILED\n");
50                                 return -1;
51                         }
52                         fec->rbdBase[ix].dataPointer = (uint32)data;
53                 }
54                 fec->rbdBase[ix].status = FEC_RBD_EMPTY;
55                 fec->rbdBase[ix].dataLength = 0;
56         }
57         once ++;
58
59         /*
60          * have the last RBD to close the ring
61          */
62         fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
63         fec->rbdIndex = 0;
64
65         return 0;
66 }
67
68 /********************************************************************/
69 static void mpc5xxx_fec_tbd_init(mpc5xxx_fec_priv *fec)
70 {
71         int ix;
72
73         for (ix = 0; ix < FEC_TBD_NUM; ix++) {
74                 fec->tbdBase[ix].status = 0;
75         }
76
77         /*
78          * Have the last TBD to close the ring
79          */
80         fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
81
82         /*
83          * Initialize some indices
84          */
85         fec->tbdIndex = 0;
86         fec->usedTbdIndex = 0;
87         fec->cleanTbdNum = FEC_TBD_NUM;
88 }
89
90 /********************************************************************/
91 static void mpc5xxx_fec_rbd_clean(mpc5xxx_fec_priv *fec, FEC_RBD * pRbd)
92 {
93         /*
94          * Reset buffer descriptor as empty
95          */
96         if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
97                 pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
98         else
99                 pRbd->status = FEC_RBD_EMPTY;
100
101         pRbd->dataLength = 0;
102
103         /*
104          * Now, we have an empty RxBD, restart the SmartDMA receive task
105          */
106         SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
107
108         /*
109          * Increment BD count
110          */
111         fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
112 }
113
114 /********************************************************************/
115 static void mpc5xxx_fec_tbd_scrub(mpc5xxx_fec_priv *fec)
116 {
117         FEC_TBD *pUsedTbd;
118
119 #if (DEBUG & 0x1)
120         printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
121                 fec->cleanTbdNum, fec->usedTbdIndex);
122 #endif
123
124         /*
125          * process all the consumed TBDs
126          */
127         while (fec->cleanTbdNum < FEC_TBD_NUM) {
128                 pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
129                 if (pUsedTbd->status & FEC_TBD_READY) {
130 #if (DEBUG & 0x20)
131                         printf("Cannot clean TBD %d, in use\n", fec->cleanTbdNum);
132 #endif
133                         return;
134                 }
135
136                 /*
137                  * clean this buffer descriptor
138                  */
139                 if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
140                         pUsedTbd->status = FEC_TBD_WRAP;
141                 else
142                         pUsedTbd->status = 0;
143
144                 /*
145                  * update some indeces for a correct handling of the TBD ring
146                  */
147                 fec->cleanTbdNum++;
148                 fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
149         }
150 }
151
152 /********************************************************************/
153 static void mpc5xxx_fec_set_hwaddr(mpc5xxx_fec_priv *fec, char *mac)
154 {
155         uint8 currByte;                 /* byte for which to compute the CRC */
156         int byte;                       /* loop - counter */
157         int bit;                        /* loop - counter */
158         uint32 crc = 0xffffffff;        /* initial value */
159
160         /*
161          * The algorithm used is the following:
162          * we loop on each of the six bytes of the provided address,
163          * and we compute the CRC by left-shifting the previous
164          * value by one position, so that each bit in the current
165          * byte of the address may contribute the calculation. If
166          * the latter and the MSB in the CRC are different, then
167          * the CRC value so computed is also ex-ored with the
168          * "polynomium generator". The current byte of the address
169          * is also shifted right by one bit at each iteration.
170          * This is because the CRC generatore in hardware is implemented
171          * as a shift-register with as many ex-ores as the radixes
172          * in the polynomium. This suggests that we represent the
173          * polynomiumm itself as a 32-bit constant.
174          */
175         for (byte = 0; byte < 6; byte++) {
176                 currByte = mac[byte];
177                 for (bit = 0; bit < 8; bit++) {
178                         if ((currByte & 0x01) ^ (crc & 0x01)) {
179                                 crc >>= 1;
180                                 crc = crc ^ 0xedb88320;
181                         } else {
182                                 crc >>= 1;
183                         }
184                         currByte >>= 1;
185                 }
186         }
187
188         crc = crc >> 26;
189
190         /*
191          * Set individual hash table register
192          */
193         if (crc >= 32) {
194                 fec->eth->iaddr1 = (1 << (crc - 32));
195                 fec->eth->iaddr2 = 0;
196         } else {
197                 fec->eth->iaddr1 = 0;
198                 fec->eth->iaddr2 = (1 << crc);
199         }
200
201         /*
202          * Set physical address
203          */
204         fec->eth->paddr1 = (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
205         fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
206 }
207
208 /********************************************************************/
209 static int mpc5xxx_fec_init(struct eth_device *dev, bd_t * bis)
210 {
211         mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
212         struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
213         const uint8 phyAddr = 0;        /* Only one PHY */
214
215 #if (DEBUG & 0x1)
216         printf ("mpc5xxx_fec_init... Begin\n");
217 #endif
218
219         /*
220          * Initialize RxBD/TxBD rings
221          */
222         mpc5xxx_fec_rbd_init(fec);
223         mpc5xxx_fec_tbd_init(fec);
224
225         /*
226          * Initialize GPIO pins
227          */
228         if (fec->xcv_type == SEVENWIRE) {
229                 /*  10MBit with 7-wire operation */
230                 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00020000;
231         } else {
232                 /* 100MBit with MD operation */
233                 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00050000;
234         }
235
236         /*
237          * Clear FEC-Lite interrupt event register(IEVENT)
238          */
239         fec->eth->ievent = 0xffffffff;
240
241         /*
242          * Set interrupt mask register
243          */
244         fec->eth->imask = 0x00000000;
245
246         /*
247          * Set FEC-Lite receive control register(R_CNTRL):
248          */
249         if (fec->xcv_type == SEVENWIRE) {
250                 /*
251                  * Frame length=1518; 7-wire mode
252                  */
253                 fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
254         } else {
255                 /*
256                  * Frame length=1518; MII mode;
257                  */
258                 fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
259         }
260
261         if (fec->xcv_type == SEVENWIRE) {
262                 /*
263                  * Set FEC-Lite transmit control register(X_CNTRL):
264                  */
265                 /*fec->eth->x_cntrl = 0x00000002; */  /* half-duplex, heartbeat */
266                 fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
267         } else {
268                 /*fec->eth->x_cntrl = 0x00000006; */  /* full-duplex, heartbeat */
269                 fec->eth->x_cntrl = 0x00000004; /* full-duplex, heartbeat disabled */
270
271                 /*
272                  * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock(25Mhz)
273                  * and do not drop the Preamble.
274                  */
275                 fec->eth->mii_speed = (0x5 << 1);       /* No MII for 7-wire mode */
276         }
277
278         /*
279          * Set Opcode/Pause Duration Register
280          */
281         fec->eth->op_pause = 0x00010020;        /*FIXME0xffff0020; */
282
283         /*
284          * Set Rx FIFO alarm and granularity value
285          */
286         fec->eth->rfifo_cntrl = 0x0c000000;
287         fec->eth->rfifo_alarm = 0x0000030c;
288 #if (DEBUG & 0x22)
289         if (fec->eth->rfifo_status & 0x00700000 ) {
290                 printf("mpc5xxx_fec_init() RFIFO error\n");
291         }
292 #endif
293
294         /*
295          * Set Tx FIFO granularity value
296          */
297         fec->eth->tfifo_cntrl = 0x0c000000;
298 #if (DEBUG & 0x2)
299         printf("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
300         printf("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
301 #endif
302
303         /*
304          * Set transmit fifo watermark register(X_WMRK), default = 64
305          */
306         fec->eth->tfifo_alarm = 0x00000080;
307         fec->eth->x_wmrk = 0x2;
308
309         /*
310          * Set individual address filter for unicast address
311          * and set physical address registers.
312          */
313         mpc5xxx_fec_set_hwaddr(fec, dev->enetaddr);
314
315         /*
316          * Set multicast address filter
317          */
318         fec->eth->gaddr1 = 0x00000000;
319         fec->eth->gaddr2 = 0x00000000;
320
321         /*
322          * Turn ON cheater FSM: ????
323          */
324         fec->eth->xmit_fsm = 0x03000000;
325
326 #if defined(CONFIG_MPC5200)
327         /*
328          * Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
329          * work w/ the current receive task.
330          */
331          sdma->PtdCntrl |= 0x00000001;
332 #endif
333
334         /*
335          * Set priority of different initiators
336          */
337         sdma->IPR0 = 7;         /* always */
338         sdma->IPR3 = 6;         /* Eth RX */
339         sdma->IPR4 = 5;         /* Eth Tx */
340
341         /*
342          * Clear SmartDMA task interrupt pending bits
343          */
344         SDMA_CLEAR_IEVENT(FEC_RECV_TASK_NO);
345
346         /*
347          * Initialize SmartDMA parameters stored in SRAM
348          */
349         *(int *)FEC_TBD_BASE = (int)fec->tbdBase;
350         *(int *)FEC_RBD_BASE = (int)fec->rbdBase;
351         *(int *)FEC_TBD_NEXT = (int)fec->tbdBase;
352         *(int *)FEC_RBD_NEXT = (int)fec->rbdBase;
353
354         if (fec->xcv_type != SEVENWIRE) {
355                 /*
356                  * Initialize PHY(LXT971A):
357                  *
358                  *   Generally, on power up, the LXT971A reads its configuration
359                  *   pins to check for forced operation, If not cofigured for
360                  *   forced operation, it uses auto-negotiation/parallel detection
361                  *   to automatically determine line operating conditions.
362                  *   If the PHY device on the other side of the link supports
363                  *   auto-negotiation, the LXT971A auto-negotiates with it
364                  *   using Fast Link Pulse(FLP) Bursts. If the PHY partner does not
365                  *   support auto-negotiation, the LXT971A automatically detects
366                  *   the presence of either link pulses(10Mbps PHY) or Idle
367                  *   symbols(100Mbps) and sets its operating conditions accordingly.
368                  *
369                  *   When auto-negotiation is controlled by software, the following
370                  *   steps are recommended.
371                  *
372                  * Note:
373                  *   The physical address is dependent on hardware configuration.
374                  *
375                  */
376                 int timeout = 1;
377                 uint16 phyStatus;
378
379                 /*
380                  * Reset PHY, then delay 300ns
381                  */
382                 miiphy_write(phyAddr, 0x0, 0x8000);
383                 udelay(1000);
384
385                 if (fec->xcv_type == MII10) {
386                         /*
387                          * Force 10Base-T, FDX operation
388                          */
389                         printf("Forcing 10 Mbps ethernet link... ");
390                         miiphy_read(phyAddr, 0x1, &phyStatus);
391                         /*
392                         miiphy_write(fec, phyAddr, 0x0, 0x0100);
393                         */
394                         miiphy_write(phyAddr, 0x0, 0x0180);
395
396                         timeout = 20;
397                         do {    /* wait for link status to go down */
398                                 udelay(10000);
399                                 if ((timeout--) == 0) {
400 #if (DEBUG & 0x2)
401                                         printf("hmmm, should not have waited...");
402 #endif
403                                         break;
404                                 }
405                                 miiphy_read(phyAddr, 0x1, &phyStatus);
406 #if (DEBUG & 0x2)
407                                 printf("=");
408 #endif
409                         } while ((phyStatus & 0x0004)); /* !link up */
410
411                         timeout = 1000;
412                         do {    /* wait for link status to come back up */
413                                 udelay(10000);
414                                 if ((timeout--) == 0) {
415                                         printf("failed. Link is down.\n");
416                                         break;
417                                 }
418                                 miiphy_read(phyAddr, 0x1, &phyStatus);
419 #if (DEBUG & 0x2)
420                                 printf("+");
421 #endif
422                         } while (!(phyStatus & 0x0004));        /* !link up */
423
424                         printf ("done.\n");
425                 } else {        /* MII100 */
426                         /*
427                          * Set the auto-negotiation advertisement register bits
428                          */
429                         miiphy_write(phyAddr, 0x4, 0x01e1);
430
431                         /*
432                          * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
433                          */
434                         miiphy_write(phyAddr, 0x0, 0x1200);
435
436                         /*
437                          * Wait for AN completion
438                          */
439                         timeout = 5000;
440                         do {
441                                 udelay(1000);
442
443                                 if ((timeout--) == 0) {
444 #if (DEBUG & 0x2)
445                                         printf("PHY auto neg 0 failed...\n");
446 #endif
447                                         return -1;
448                                 }
449
450                                 if (miiphy_read(phyAddr, 0x1, &phyStatus) != 0) {
451 #if (DEBUG & 0x2)
452                                         printf("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
453 #endif
454                                         return -1;
455                                 }
456                         } while ((phyStatus & 0x0020) != 0x0020);
457
458 #if (DEBUG & 0x2)
459                         printf("PHY auto neg complete! \n");
460 #endif
461                 }
462
463         }
464
465         /*
466          * Enable FEC-Lite controller
467          */
468         fec->eth->ecntrl |= 0x00000006;
469
470         if (fec->xcv_type != SEVENWIRE) {
471 #if (DEBUG & 0x2)
472                 uint16 phyStatus, i;
473                 uint8 phyAddr = 0;
474
475                 for (i = 0; i < 9; i++) {
476                         miiphy_read(phyAddr, i, &phyStatus);
477                         printf("Mii reg %d: 0x%04x\n", i, phyStatus);
478                 }
479                 for (i = 16; i < 21; i++) {
480                         miiphy_read(phyAddr, i, &phyStatus);
481                         printf("Mii reg %d: 0x%04x\n", i, phyStatus);
482                 }
483 #endif
484         }
485         /*
486          * Enable SmartDMA receive task
487          */
488         SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
489
490 #if (DEBUG & 0x1)
491         printf("mpc5xxx_fec_init... Done \n");
492 #endif
493
494         return 0;
495 }
496
497 /********************************************************************/
498 static void mpc5xxx_fec_halt(struct eth_device *dev)
499 {
500 #if defined(CONFIG_MPC5200)
501         struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
502 #endif
503         mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
504         int counter = 0xffff;
505
506 #if (DEBUG & 0x2)
507         if (fec->xcv_type != SEVENWIRE) {
508                 uint16 phyStatus, i;
509                 uint8 phyAddr = 0;
510
511                 for (i = 0; i < 9; i++) {
512                         miiphy_read(phyAddr, i, &phyStatus);
513                         printf("Mii reg %d: 0x%04x\n", i, phyStatus);
514                 }
515                 for (i = 16; i < 21; i++) {
516                         miiphy_read(phyAddr, i, &phyStatus);
517                         printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
518                 }
519         }
520 #endif
521
522
523         /*
524          * mask FEC chip interrupts
525          */
526         fec->eth->imask = 0;
527
528         /*
529          * issue graceful stop command to the FEC transmitter if necessary
530          */
531         fec->eth->x_cntrl |= 0x00000001;
532
533         /*
534          * wait for graceful stop to register
535          */
536         while ((counter--) && (!(fec->eth->ievent & 0x10000000))) ;
537
538         /*
539          * Disable SmartDMA tasks
540          */
541         SDMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
542         SDMA_TASK_DISABLE (FEC_RECV_TASK_NO);
543
544 #if defined(CONFIG_MPC5200)
545         /*
546          * Turn on COMM bus prefetch in the MGT5200 BestComm after we're
547          * done. It doesn't work w/ the current receive task.
548          */
549          sdma->PtdCntrl &= ~0x00000001;
550 #endif
551
552         /*
553          * Disable the Ethernet Controller
554          */
555         fec->eth->ecntrl &= 0xfffffffd;
556
557         /*
558          * Clear FIFO status registers
559          */
560         fec->eth->rfifo_status &= 0x00700000;
561         fec->eth->tfifo_status &= 0x00700000;
562
563         fec->eth->reset_cntrl = 0x01000000;
564
565         /*
566          * Issue a reset command to the FEC chip
567          */
568         fec->eth->ecntrl |= 0x1;
569
570         /*
571          * wait at least 16 clock cycles
572          */
573         udelay(10);
574
575 #if (DEBUG & 0x3)
576         printf("Ethernet task stopped\n");
577 #endif
578 }
579
580 #if (DEBUG & 0x60)
581 /********************************************************************/
582
583 static void tfifo_print(mpc5xxx_fec_priv *fec)
584 {
585         uint16 phyAddr = 0;
586         uint16 phyStatus;
587
588         if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
589                 || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
590
591                 miiphy_read(phyAddr, 0x1, &phyStatus);
592                 printf("\nphyStatus: 0x%04x\n", phyStatus);
593                 printf("ecntrl:   0x%08x\n", fec->eth->ecntrl);
594                 printf("ievent:   0x%08x\n", fec->eth->ievent);
595                 printf("x_status: 0x%08x\n", fec->eth->x_status);
596                 printf("tfifo: status  0x%08x\n", fec->eth->tfifo_status);
597
598                 printf("       control 0x%08x\n", fec->eth->tfifo_cntrl);
599                 printf("       lrfp    0x%08x\n", fec->eth->tfifo_lrf_ptr);
600                 printf("       lwfp    0x%08x\n", fec->eth->tfifo_lwf_ptr);
601                 printf("       alarm   0x%08x\n", fec->eth->tfifo_alarm);
602                 printf("       readptr 0x%08x\n", fec->eth->tfifo_rdptr);
603                 printf("       writptr 0x%08x\n", fec->eth->tfifo_wrptr);
604         }
605 }
606
607 static void rfifo_print(mpc5xxx_fec_priv *fec)
608 {
609         uint16 phyAddr = 0;
610         uint16 phyStatus;
611
612         if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
613                 || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
614
615                 miiphy_read(phyAddr, 0x1, &phyStatus);
616                 printf("\nphyStatus: 0x%04x\n", phyStatus);
617                 printf("ecntrl:   0x%08x\n", fec->eth->ecntrl);
618                 printf("ievent:   0x%08x\n", fec->eth->ievent);
619                 printf("x_status: 0x%08x\n", fec->eth->x_status);
620                 printf("rfifo: status  0x%08x\n", fec->eth->rfifo_status);
621
622                 printf("       control 0x%08x\n", fec->eth->rfifo_cntrl);
623                 printf("       lrfp    0x%08x\n", fec->eth->rfifo_lrf_ptr);
624                 printf("       lwfp    0x%08x\n", fec->eth->rfifo_lwf_ptr);
625                 printf("       alarm   0x%08x\n", fec->eth->rfifo_alarm);
626                 printf("       readptr 0x%08x\n", fec->eth->rfifo_rdptr);
627                 printf("       writptr 0x%08x\n", fec->eth->rfifo_wrptr);
628         }
629 }
630 #endif /* DEBUG */
631
632 /********************************************************************/
633
634 static int mpc5xxx_fec_send(struct eth_device *dev, volatile void *eth_data,
635                 int data_length)
636 {
637         /*
638          * This routine transmits one frame.  This routine only accepts
639          * 6-byte Ethernet addresses.
640          */
641         mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
642         FEC_TBD *pTbd;
643
644 #if (DEBUG & 0x20)
645         printf("tbd status: 0x%04x\n", fec->tbdBase[0].status);
646         tfifo_print(fec);
647 #endif
648
649         /*
650          * Clear Tx BD ring at first
651          */
652         mpc5xxx_fec_tbd_scrub(fec);
653
654         /*
655          * Check for valid length of data.
656          */
657         if ((data_length > 1500) || (data_length <= 0)) {
658                 return -1;
659         }
660
661         /*
662          * Check the number of vacant TxBDs.
663          */
664         if (fec->cleanTbdNum < 1) {
665 #if (DEBUG & 0x20)
666                 printf("No available TxBDs ...\n");
667 #endif
668                 return -1;
669         }
670
671         /*
672          * Get the first TxBD to send the mac header
673          */
674         pTbd = &fec->tbdBase[fec->tbdIndex];
675         pTbd->dataLength = data_length;
676         pTbd->dataPointer = (uint32)eth_data;
677         pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
678         fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
679
680 #if (DEBUG & 0x100)
681         printf("SDMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
682 #endif
683
684         /*
685          * Kick the MII i/f
686          */
687         if (fec->xcv_type != SEVENWIRE) {
688                 uint16 phyStatus;
689                 miiphy_read(0, 0x1, &phyStatus);
690         }
691
692         /*
693          * Enable SmartDMA transmit task
694          */
695
696 #if (DEBUG & 0x20)
697         tfifo_print(fec);
698 #endif
699         SDMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
700 #if (DEBUG & 0x20)
701         tfifo_print(fec);
702 #endif
703 #if (DEBUG & 0x8)
704         printf( "+" );
705 #endif
706
707         fec->cleanTbdNum -= 1;
708
709 #if (DEBUG & 0x129) && (DEBUG & 0x80000000)
710         printf ("smartDMA ethernet Tx task enabled\n");
711 #endif
712         /*
713          * wait until frame is sent .
714          */
715         while (pTbd->status & FEC_TBD_READY) {
716                 udelay(10);
717 #if (DEBUG & 0x8)
718                 printf ("TDB status = %04x\n", pTbd->status);
719 #endif
720         }
721
722         return 0;
723 }
724
725
726 /********************************************************************/
727 static int mpc5xxx_fec_recv(struct eth_device *dev)
728 {
729         /*
730          * This command pulls one frame from the card
731          */
732         mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
733         FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
734         unsigned long ievent;
735         int frame_length, len = 0;
736         NBUF *frame;
737         char buff[FEC_MAX_PKT_SIZE];
738
739 #if (DEBUG & 0x1)
740         printf ("mpc5xxx_fec_recv %d Start...\n", fec->rbdIndex);
741 #endif
742 #if (DEBUG & 0x8)
743         printf( "-" );
744 #endif
745
746         /*
747          * Check if any critical events have happened
748          */
749         ievent = fec->eth->ievent;
750         fec->eth->ievent = ievent;
751         if (ievent & 0x20060000) {
752                 /* BABT, Rx/Tx FIFO errors */
753                 mpc5xxx_fec_halt(dev);
754                 mpc5xxx_fec_init(dev, NULL);
755                 return 0;
756         }
757         if (ievent & 0x80000000) {
758                 /* Heartbeat error */
759                 fec->eth->x_cntrl |= 0x00000001;
760         }
761         if (ievent & 0x10000000) {
762                 /* Graceful stop complete */
763                 if (fec->eth->x_cntrl & 0x00000001) {
764                         mpc5xxx_fec_halt(dev);
765                         fec->eth->x_cntrl &= ~0x00000001;
766                         mpc5xxx_fec_init(dev, NULL);
767                 }
768         }
769
770         if (!(pRbd->status & FEC_RBD_EMPTY)) {
771                 if ((pRbd->status & FEC_RBD_LAST) && !(pRbd->status & FEC_RBD_ERR) &&
772                         ((pRbd->dataLength - 4) > 14)) {
773
774                         /*
775                          * Get buffer address and size
776                          */
777                         frame = (NBUF *)pRbd->dataPointer;
778                         frame_length = pRbd->dataLength - 4;
779
780 #if (DEBUG & 0x20)
781                         {
782                                 int i;
783                                 printf("recv data hdr:");
784                                 for (i = 0; i < 14; i++)
785                                         printf("%x ", *(frame->head + i));
786                                 printf("\n");
787                         }
788 #endif
789                         /*
790                          *  Fill the buffer and pass it to upper layers
791                          */
792                         memcpy(buff, frame->head, 14);
793                         memcpy(buff + 14, frame->data, frame_length);
794                         NetReceive(buff, frame_length);
795                         len = frame_length;
796                 }
797                 /*
798                  * Reset buffer descriptor as empty
799                  */
800                 mpc5xxx_fec_rbd_clean(fec, pRbd);
801         }
802         SDMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
803         return len;
804 }
805
806
807 /********************************************************************/
808 int mpc5xxx_fec_initialize(bd_t * bis)
809 {
810         mpc5xxx_fec_priv *fec;
811         struct eth_device *dev;
812
813         fec = (mpc5xxx_fec_priv *)malloc(sizeof(*fec));
814         dev = (struct eth_device *)malloc(sizeof(*dev));
815
816         fec->eth = (ethernet_regs *)MPC5XXX_FEC;
817         fec->tbdBase = (FEC_TBD *)FEC_BD_BASE;
818         fec->rbdBase = (FEC_RBD *)(FEC_BD_BASE + FEC_TBD_NUM * sizeof(FEC_TBD));
819 #ifdef CONFIG_ICECUBE
820         fec->xcv_type = MII100;
821 #endif
822
823         dev->priv = (void *)fec;
824         dev->iobase = MPC5XXX_FEC;
825         dev->init = mpc5xxx_fec_init;
826         dev->halt = mpc5xxx_fec_halt;
827         dev->send = mpc5xxx_fec_send;
828         dev->recv = mpc5xxx_fec_recv;
829
830         sprintf(dev->name, "FEC ETHERNET");
831         eth_register(dev);
832
833         return 1;
834 }
835
836 /* MII-interface related functions */
837 /********************************************************************/
838 int miiphy_read(uint8 phyAddr, uint8 regAddr, uint16 * retVal)
839 {
840         ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
841         uint32 reg;             /* convenient holder for the PHY register */
842         uint32 phy;             /* convenient holder for the PHY */
843         int timeout = 0xffff;
844
845         /*
846          * reading from any PHY's register is done by properly
847          * programming the FEC's MII data register.
848          */
849         reg = regAddr << FEC_MII_DATA_RA_SHIFT;
850         phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
851
852         eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy | reg);
853
854         /*
855          * wait for the related interrupt
856          */
857         while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
858
859         if (timeout == 0) {
860 #if (DEBUG & 0x2)
861                 printf ("Read MDIO failed...\n");
862 #endif
863                 return -1;
864         }
865
866         /*
867          * clear mii interrupt bit
868          */
869         eth->ievent = 0x00800000;
870
871         /*
872          * it's now safe to read the PHY's register
873          */
874         *retVal = (uint16) eth->mii_data;
875
876         return 0;
877 }
878
879 /********************************************************************/
880 int miiphy_write(uint8 phyAddr, uint8 regAddr, uint16 data)
881 {
882         ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
883         uint32 reg;             /* convenient holder for the PHY register */
884         uint32 phy;             /* convenient holder for the PHY */
885         int timeout = 0xffff;
886
887         reg = regAddr << FEC_MII_DATA_RA_SHIFT;
888         phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
889
890         eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
891                         FEC_MII_DATA_TA | phy | reg | data);
892
893         /*
894          * wait for the MII interrupt
895          */
896         while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
897
898         if (timeout == 0) {
899 #if (DEBUG & 0x2)
900                 printf ("Write MDIO failed...\n");
901 #endif
902                 return -1;
903         }
904
905         /*
906          * clear MII interrupt bit
907          */
908         eth->ievent = 0x00800000;
909
910         return 0;
911 }
912
913 #if (DEBUG & 0x40)
914 static uint32 local_crc32(char *string, unsigned int crc_value, int len)
915 {
916         int i;
917         char c;
918         unsigned int crc, count;
919
920         /*
921          * crc32 algorithm
922          */
923         /*
924          * crc = 0xffffffff; * The initialized value should be 0xffffffff
925          */
926         crc = crc_value;
927
928         for (i = len; --i >= 0;) {
929                 c = *string++;
930                 for (count = 0; count < 8; count++) {
931                         if ((c & 0x01) ^ (crc & 0x01)) {
932                                 crc >>= 1;
933                                 crc = crc ^ 0xedb88320;
934                         } else {
935                                 crc >>= 1;
936                         }
937                         c >>= 1;
938                 }
939         }
940
941         /*
942          * In big endian system, do byte swaping for crc value
943          */
944          /**/ return crc;
945 }
946 #endif  /* DEBUG */
947
948 #endif /* CONFIG_MPC5XXX_FEC */