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wdenk983fda82004-10-28 00:09:35 +00001/*
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 <mpc8220.h>
11#include <malloc.h>
12#include <net.h>
13#include <miiphy.h>
14#include "dma.h"
15#include "fec.h"
16
wdenkba91e262005-05-30 23:55:42 +000017#undef DEBUG
wdenk7680c142005-05-16 15:23:22 +000018#if (CONFIG_COMMANDS & CFG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
19 defined(CONFIG_MPC8220_FEC)
wdenk983fda82004-10-28 00:09:35 +000020
Marian Balakowicz63ff0042005-10-28 22:30:33 +020021#if !(defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII))
22#error "CONFIG_MII has to be defined!"
23#endif
wdenk983fda82004-10-28 00:09:35 +000024
wdenkba91e262005-05-30 23:55:42 +000025#ifdef DEBUG
Marian Balakowicz63ff0042005-10-28 22:30:33 +020026static void tfifo_print (char *devname, mpc8220_fec_priv * fec);
27static void rfifo_print (char *devname, mpc8220_fec_priv * fec);
wdenk983fda82004-10-28 00:09:35 +000028#endif /* DEBUG */
29
wdenkba91e262005-05-30 23:55:42 +000030#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +000031static u32 local_crc32 (char *string, unsigned int crc_value, int len);
32#endif
33
34typedef struct {
35 u8 data[1500]; /* actual data */
36 int length; /* actual length */
37 int used; /* buffer in use or not */
38 u8 head[16]; /* MAC header(6 + 6 + 2) + 2(aligned) */
39} NBUF;
40
Marian Balakowicz63ff0042005-10-28 22:30:33 +020041int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
42int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data);
43
wdenk983fda82004-10-28 00:09:35 +000044/********************************************************************/
wdenkba91e262005-05-30 23:55:42 +000045#ifdef DEBUG
Marian Balakowicz63ff0042005-10-28 22:30:33 +020046static void mpc8220_fec_phydump (char *devname)
wdenk983fda82004-10-28 00:09:35 +000047{
48 u16 phyStatus, i;
49 u8 phyAddr = CONFIG_PHY_ADDR;
50 u8 reg_mask[] = {
51#if CONFIG_PHY_TYPE == 0x79c874 /* AMD Am79C874 */
52 /* regs to print: 0...7, 16...19, 21, 23, 24 */
53 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
54 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
55#else
56 /* regs to print: 0...8, 16...20 */
57 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
58 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
59#endif
60 };
61
62 for (i = 0; i < 32; i++) {
63 if (reg_mask[i]) {
Marian Balakowicz63ff0042005-10-28 22:30:33 +020064 miiphy_read (devname, phyAddr, i, &phyStatus);
wdenk983fda82004-10-28 00:09:35 +000065 printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
66 }
67 }
68}
69#endif
70
71/********************************************************************/
72static int mpc8220_fec_rbd_init (mpc8220_fec_priv * fec)
73{
74 int ix;
75 char *data;
76 static int once = 0;
77
78 for (ix = 0; ix < FEC_RBD_NUM; ix++) {
79 if (!once) {
80 data = (char *) malloc (FEC_MAX_PKT_SIZE);
81 if (data == NULL) {
82 printf ("RBD INIT FAILED\n");
83 return -1;
84 }
85 fec->rbdBase[ix].dataPointer = (u32) data;
86 }
87 fec->rbdBase[ix].status = FEC_RBD_EMPTY;
88 fec->rbdBase[ix].dataLength = 0;
89 }
90 once++;
91
92 /*
93 * have the last RBD to close the ring
94 */
95 fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
96 fec->rbdIndex = 0;
97
98 return 0;
99}
100
101/********************************************************************/
102static void mpc8220_fec_tbd_init (mpc8220_fec_priv * fec)
103{
104 int ix;
105
106 for (ix = 0; ix < FEC_TBD_NUM; ix++) {
107 fec->tbdBase[ix].status = 0;
108 }
109
110 /*
111 * Have the last TBD to close the ring
112 */
113 fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
114
115 /*
116 * Initialize some indices
117 */
118 fec->tbdIndex = 0;
119 fec->usedTbdIndex = 0;
120 fec->cleanTbdNum = FEC_TBD_NUM;
121}
122
123/********************************************************************/
124static void mpc8220_fec_rbd_clean (mpc8220_fec_priv * fec, FEC_RBD * pRbd)
125{
126 /*
127 * Reset buffer descriptor as empty
128 */
129 if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
130 pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
131 else
132 pRbd->status = FEC_RBD_EMPTY;
133
134 pRbd->dataLength = 0;
135
136 /*
137 * Now, we have an empty RxBD, restart the SmartDMA receive task
138 */
139 DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
140
141 /*
142 * Increment BD count
143 */
144 fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
145}
146
147/********************************************************************/
148static void mpc8220_fec_tbd_scrub (mpc8220_fec_priv * fec)
149{
150 FEC_TBD *pUsedTbd;
151
wdenkba91e262005-05-30 23:55:42 +0000152#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000153 printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
154 fec->cleanTbdNum, fec->usedTbdIndex);
155#endif
156
157 /*
158 * process all the consumed TBDs
159 */
160 while (fec->cleanTbdNum < FEC_TBD_NUM) {
161 pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
162 if (pUsedTbd->status & FEC_TBD_READY) {
wdenkba91e262005-05-30 23:55:42 +0000163#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000164 printf ("Cannot clean TBD %d, in use\n",
165 fec->cleanTbdNum);
166#endif
167 return;
168 }
169
170 /*
171 * clean this buffer descriptor
172 */
173 if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
174 pUsedTbd->status = FEC_TBD_WRAP;
175 else
176 pUsedTbd->status = 0;
177
178 /*
179 * update some indeces for a correct handling of the TBD ring
180 */
181 fec->cleanTbdNum++;
182 fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
183 }
184}
185
186/********************************************************************/
187static void mpc8220_fec_set_hwaddr (mpc8220_fec_priv * fec, char *mac)
188{
189 u8 currByte; /* byte for which to compute the CRC */
190 int byte; /* loop - counter */
191 int bit; /* loop - counter */
192 u32 crc = 0xffffffff; /* initial value */
193
194 /*
195 * The algorithm used is the following:
196 * we loop on each of the six bytes of the provided address,
197 * and we compute the CRC by left-shifting the previous
198 * value by one position, so that each bit in the current
199 * byte of the address may contribute the calculation. If
200 * the latter and the MSB in the CRC are different, then
201 * the CRC value so computed is also ex-ored with the
202 * "polynomium generator". The current byte of the address
203 * is also shifted right by one bit at each iteration.
204 * This is because the CRC generatore in hardware is implemented
205 * as a shift-register with as many ex-ores as the radixes
206 * in the polynomium. This suggests that we represent the
207 * polynomiumm itself as a 32-bit constant.
208 */
209 for (byte = 0; byte < 6; byte++) {
210 currByte = mac[byte];
211 for (bit = 0; bit < 8; bit++) {
212 if ((currByte & 0x01) ^ (crc & 0x01)) {
213 crc >>= 1;
214 crc = crc ^ 0xedb88320;
215 } else {
216 crc >>= 1;
217 }
218 currByte >>= 1;
219 }
220 }
221
222 crc = crc >> 26;
223
224 /*
225 * Set individual hash table register
226 */
227 if (crc >= 32) {
228 fec->eth->iaddr1 = (1 << (crc - 32));
229 fec->eth->iaddr2 = 0;
230 } else {
231 fec->eth->iaddr1 = 0;
232 fec->eth->iaddr2 = (1 << crc);
233 }
234
235 /*
236 * Set physical address
237 */
238 fec->eth->paddr1 =
239 (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
240 fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
241}
242
243/********************************************************************/
244static int mpc8220_fec_init (struct eth_device *dev, bd_t * bis)
245{
246 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
247 struct mpc8220_dma *dma = (struct mpc8220_dma *) MMAP_DMA;
248 const u8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
249
wdenkba91e262005-05-30 23:55:42 +0000250#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000251 printf ("mpc8220_fec_init... Begin\n");
252#endif
253
254 /*
255 * Initialize RxBD/TxBD rings
256 */
257 mpc8220_fec_rbd_init (fec);
258 mpc8220_fec_tbd_init (fec);
259
260 /*
261 * Set up Pin Muxing for FEC 1
262 */
263 *(vu_long *) MMAP_PCFG = 0;
264 *(vu_long *) (MMAP_PCFG + 4) = 0;
265 /*
266 * Clear FEC-Lite interrupt event register(IEVENT)
267 */
268 fec->eth->ievent = 0xffffffff;
269
270 /*
271 * Set interrupt mask register
272 */
273 fec->eth->imask = 0x00000000;
274
275 /*
276 * Set FEC-Lite receive control register(R_CNTRL):
277 */
278 if (fec->xcv_type == SEVENWIRE) {
279 /*
280 * Frame length=1518; 7-wire mode
281 */
282 fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
283 } else {
284 /*
285 * Frame length=1518; MII mode;
286 */
287 fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
288 }
289
290 fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
291 if (fec->xcv_type != SEVENWIRE) {
292 /*
293 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
294 * and do not drop the Preamble.
295 */
296 /* tbd - rtm */
297 /*fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); */
298 /* No MII for 7-wire mode */
299 fec->eth->mii_speed = 0x00000030;
300 }
301
302 /*
303 * Set Opcode/Pause Duration Register
304 */
305 fec->eth->op_pause = 0x00010020; /*FIXME0xffff0020; */
306
307 /*
308 * Set Rx FIFO alarm and granularity value
309 */
310 fec->eth->rfifo_cntrl = 0x0c000000;
311 fec->eth->rfifo_alarm = 0x0000030c;
wdenkba91e262005-05-30 23:55:42 +0000312#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000313 if (fec->eth->rfifo_status & 0x00700000) {
314 printf ("mpc8220_fec_init() RFIFO error\n");
315 }
316#endif
317
318 /*
319 * Set Tx FIFO granularity value
320 */
321 /*fec->eth->tfifo_cntrl = 0x0c000000; */ /*tbd - rtm */
322 fec->eth->tfifo_cntrl = 0x0e000000;
wdenkba91e262005-05-30 23:55:42 +0000323#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000324 printf ("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
325 printf ("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
326#endif
327
328 /*
329 * Set transmit fifo watermark register(X_WMRK), default = 64
330 */
331 fec->eth->tfifo_alarm = 0x00000080;
332 fec->eth->x_wmrk = 0x2;
333
334 /*
335 * Set individual address filter for unicast address
336 * and set physical address registers.
337 */
Wolfgang Denk77ddac92005-10-13 16:45:02 +0200338 mpc8220_fec_set_hwaddr (fec, (char *)(dev->enetaddr));
wdenk983fda82004-10-28 00:09:35 +0000339
340 /*
341 * Set multicast address filter
342 */
343 fec->eth->gaddr1 = 0x00000000;
344 fec->eth->gaddr2 = 0x00000000;
345
346 /*
347 * Turn ON cheater FSM: ????
348 */
349 fec->eth->xmit_fsm = 0x03000000;
350
351#if 1
352/*#if defined(CONFIG_MPC5200)*/
353 /*
354 * Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
355 * work w/ the current receive task.
356 */
357 dma->PtdCntrl |= 0x00000001;
358#endif
359
360 /*
361 * Set priority of different initiators
362 */
363 dma->IPR0 = 7; /* always */
364 dma->IPR3 = 6; /* Eth RX */
365 dma->IPR4 = 5; /* Eth Tx */
366
367 /*
368 * Clear SmartDMA task interrupt pending bits
369 */
370 DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
371
372 /*
373 * Initialize SmartDMA parameters stored in SRAM
374 */
375 *(int *) FEC_TBD_BASE = (int) fec->tbdBase;
376 *(int *) FEC_RBD_BASE = (int) fec->rbdBase;
377 *(int *) FEC_TBD_NEXT = (int) fec->tbdBase;
378 *(int *) FEC_RBD_NEXT = (int) fec->rbdBase;
379
380 if (fec->xcv_type != SEVENWIRE) {
381 /*
382 * Initialize PHY(LXT971A):
383 *
384 * Generally, on power up, the LXT971A reads its configuration
385 * pins to check for forced operation, If not cofigured for
386 * forced operation, it uses auto-negotiation/parallel detection
387 * to automatically determine line operating conditions.
388 * If the PHY device on the other side of the link supports
389 * auto-negotiation, the LXT971A auto-negotiates with it
390 * using Fast Link Pulse(FLP) Bursts. If the PHY partner does not
391 * support auto-negotiation, the LXT971A automatically detects
392 * the presence of either link pulses(10Mbps PHY) or Idle
393 * symbols(100Mbps) and sets its operating conditions accordingly.
394 *
395 * When auto-negotiation is controlled by software, the following
396 * steps are recommended.
397 *
398 * Note:
399 * The physical address is dependent on hardware configuration.
400 *
401 */
402 int timeout = 1;
403 u16 phyStatus;
404
405 /*
406 * Reset PHY, then delay 300ns
407 */
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200408 miiphy_write (dev->name, phyAddr, 0x0, 0x8000);
wdenk983fda82004-10-28 00:09:35 +0000409 udelay (1000);
410
411 if (fec->xcv_type == MII10) {
412 /*
413 * Force 10Base-T, FDX operation
414 */
wdenkba91e262005-05-30 23:55:42 +0000415#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000416 printf ("Forcing 10 Mbps ethernet link... ");
417#endif
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200418 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
wdenk983fda82004-10-28 00:09:35 +0000419 /*
420 miiphy_write(fec, phyAddr, 0x0, 0x0100);
421 */
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200422 miiphy_write (dev->name, phyAddr, 0x0, 0x0180);
wdenk983fda82004-10-28 00:09:35 +0000423
424 timeout = 20;
425 do { /* wait for link status to go down */
426 udelay (10000);
427 if ((timeout--) == 0) {
wdenkba91e262005-05-30 23:55:42 +0000428#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000429 printf ("hmmm, should not have waited...");
430#endif
431 break;
432 }
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200433 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
wdenkba91e262005-05-30 23:55:42 +0000434#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000435 printf ("=");
436#endif
437 } while ((phyStatus & 0x0004)); /* !link up */
438
439 timeout = 1000;
440 do { /* wait for link status to come back up */
441 udelay (10000);
442 if ((timeout--) == 0) {
443 printf ("failed. Link is down.\n");
444 break;
445 }
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200446 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
wdenkba91e262005-05-30 23:55:42 +0000447#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000448 printf ("+");
449#endif
450 } while (!(phyStatus & 0x0004)); /* !link up */
451
wdenkba91e262005-05-30 23:55:42 +0000452#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000453 printf ("done.\n");
454#endif
455 } else { /* MII100 */
456 /*
457 * Set the auto-negotiation advertisement register bits
458 */
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200459 miiphy_write (dev->name, phyAddr, 0x4, 0x01e1);
wdenk983fda82004-10-28 00:09:35 +0000460
461 /*
462 * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
463 */
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200464 miiphy_write (dev->name, phyAddr, 0x0, 0x1200);
wdenk983fda82004-10-28 00:09:35 +0000465
466 /*
467 * Wait for AN completion
468 */
469 timeout = 5000;
470 do {
471 udelay (1000);
472
473 if ((timeout--) == 0) {
wdenkba91e262005-05-30 23:55:42 +0000474#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000475 printf ("PHY auto neg 0 failed...\n");
476#endif
477 return -1;
478 }
479
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200480 if (miiphy_read (dev->name, phyAddr, 0x1, &phyStatus) !=
wdenk983fda82004-10-28 00:09:35 +0000481 0) {
wdenkba91e262005-05-30 23:55:42 +0000482#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000483 printf ("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
484#endif
485 return -1;
486 }
487 } while (!(phyStatus & 0x0004));
488
wdenkba91e262005-05-30 23:55:42 +0000489#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000490 printf ("PHY auto neg complete! \n");
491#endif
492 }
493
494 }
495
496 /*
497 * Enable FEC-Lite controller
498 */
499 fec->eth->ecntrl |= 0x00000006;
500
wdenkba91e262005-05-30 23:55:42 +0000501#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000502 if (fec->xcv_type != SEVENWIRE)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200503 mpc8220_fec_phydump (dev->name);
wdenk983fda82004-10-28 00:09:35 +0000504#endif
505
506 /*
507 * Enable SmartDMA receive task
508 */
509 DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
510
wdenkba91e262005-05-30 23:55:42 +0000511#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000512 printf ("mpc8220_fec_init... Done \n");
513#endif
514
515 return 1;
516}
517
518/********************************************************************/
519static void mpc8220_fec_halt (struct eth_device *dev)
520{
521 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
522 int counter = 0xffff;
523
wdenkba91e262005-05-30 23:55:42 +0000524#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000525 if (fec->xcv_type != SEVENWIRE)
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200526 mpc8220_fec_phydump (dev->name);
wdenk983fda82004-10-28 00:09:35 +0000527#endif
528
529 /*
530 * mask FEC chip interrupts
531 */
532 fec->eth->imask = 0;
533
534 /*
535 * issue graceful stop command to the FEC transmitter if necessary
536 */
537 fec->eth->x_cntrl |= 0x00000001;
538
539 /*
540 * wait for graceful stop to register
541 */
542 while ((counter--) && (!(fec->eth->ievent & 0x10000000)));
543
544 /*
545 * Disable SmartDMA tasks
546 */
547 DMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
548 DMA_TASK_DISABLE (FEC_RECV_TASK_NO);
549
550 /*
551 * Disable the Ethernet Controller
552 */
553 fec->eth->ecntrl &= 0xfffffffd;
554
555 /*
556 * Clear FIFO status registers
557 */
558 fec->eth->rfifo_status &= 0x00700000;
559 fec->eth->tfifo_status &= 0x00700000;
560
561 fec->eth->reset_cntrl = 0x01000000;
562
563 /*
564 * Issue a reset command to the FEC chip
565 */
566 fec->eth->ecntrl |= 0x1;
567
568 /*
569 * wait at least 16 clock cycles
570 */
571 udelay (10);
572
wdenkba91e262005-05-30 23:55:42 +0000573#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000574 printf ("Ethernet task stopped\n");
575#endif
576}
577
wdenkba91e262005-05-30 23:55:42 +0000578#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000579/********************************************************************/
580
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200581static void tfifo_print (char *devname, mpc8220_fec_priv * fec)
wdenk983fda82004-10-28 00:09:35 +0000582{
583 u16 phyAddr = CONFIG_PHY_ADDR;
584 u16 phyStatus;
585
586 if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
587 || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
588
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200589 miiphy_read (devname, phyAddr, 0x1, &phyStatus);
wdenk983fda82004-10-28 00:09:35 +0000590 printf ("\nphyStatus: 0x%04x\n", phyStatus);
591 printf ("ecntrl: 0x%08x\n", fec->eth->ecntrl);
592 printf ("ievent: 0x%08x\n", fec->eth->ievent);
593 printf ("x_status: 0x%08x\n", fec->eth->x_status);
594 printf ("tfifo: status 0x%08x\n", fec->eth->tfifo_status);
595
596 printf (" control 0x%08x\n", fec->eth->tfifo_cntrl);
597 printf (" lrfp 0x%08x\n", fec->eth->tfifo_lrf_ptr);
598 printf (" lwfp 0x%08x\n", fec->eth->tfifo_lwf_ptr);
599 printf (" alarm 0x%08x\n", fec->eth->tfifo_alarm);
600 printf (" readptr 0x%08x\n", fec->eth->tfifo_rdptr);
601 printf (" writptr 0x%08x\n", fec->eth->tfifo_wrptr);
602 }
603}
604
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200605static void rfifo_print (char *devname, mpc8220_fec_priv * fec)
wdenk983fda82004-10-28 00:09:35 +0000606{
607 u16 phyAddr = CONFIG_PHY_ADDR;
608 u16 phyStatus;
609
610 if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
611 || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
612
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200613 miiphy_read (devname, phyAddr, 0x1, &phyStatus);
wdenk983fda82004-10-28 00:09:35 +0000614 printf ("\nphyStatus: 0x%04x\n", phyStatus);
615 printf ("ecntrl: 0x%08x\n", fec->eth->ecntrl);
616 printf ("ievent: 0x%08x\n", fec->eth->ievent);
617 printf ("x_status: 0x%08x\n", fec->eth->x_status);
618 printf ("rfifo: status 0x%08x\n", fec->eth->rfifo_status);
619
620 printf (" control 0x%08x\n", fec->eth->rfifo_cntrl);
621 printf (" lrfp 0x%08x\n", fec->eth->rfifo_lrf_ptr);
622 printf (" lwfp 0x%08x\n", fec->eth->rfifo_lwf_ptr);
623 printf (" alarm 0x%08x\n", fec->eth->rfifo_alarm);
624 printf (" readptr 0x%08x\n", fec->eth->rfifo_rdptr);
625 printf (" writptr 0x%08x\n", fec->eth->rfifo_wrptr);
626 }
627}
628#endif /* DEBUG */
629
630/********************************************************************/
631
632static int mpc8220_fec_send (struct eth_device *dev, volatile void *eth_data,
633 int data_length)
634{
635 /*
636 * This routine transmits one frame. This routine only accepts
637 * 6-byte Ethernet addresses.
638 */
639 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
640 FEC_TBD *pTbd;
641
wdenkba91e262005-05-30 23:55:42 +0000642#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000643 printf ("tbd status: 0x%04x\n", fec->tbdBase[0].status);
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200644 tfifo_print (dev->name, fec);
wdenk983fda82004-10-28 00:09:35 +0000645#endif
646
647 /*
648 * Clear Tx BD ring at first
649 */
650 mpc8220_fec_tbd_scrub (fec);
651
652 /*
653 * Check for valid length of data.
654 */
655 if ((data_length > 1500) || (data_length <= 0)) {
656 return -1;
657 }
658
659 /*
660 * Check the number of vacant TxBDs.
661 */
662 if (fec->cleanTbdNum < 1) {
wdenkba91e262005-05-30 23:55:42 +0000663#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000664 printf ("No available TxBDs ...\n");
665#endif
666 return -1;
667 }
668
669 /*
670 * Get the first TxBD to send the mac header
671 */
672 pTbd = &fec->tbdBase[fec->tbdIndex];
673 pTbd->dataLength = data_length;
674 pTbd->dataPointer = (u32) eth_data;
675 pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
676 fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
677
wdenkba91e262005-05-30 23:55:42 +0000678#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000679 printf ("DMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
680#endif
681
682 /*
683 * Kick the MII i/f
684 */
685 if (fec->xcv_type != SEVENWIRE) {
686 u16 phyStatus;
687
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200688 miiphy_read (dev->name, 0, 0x1, &phyStatus);
wdenk983fda82004-10-28 00:09:35 +0000689 }
690
691 /*
692 * Enable SmartDMA transmit task
693 */
694
wdenkba91e262005-05-30 23:55:42 +0000695#ifdef DEBUG
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200696 tfifo_print (dev->name, fec);
wdenk983fda82004-10-28 00:09:35 +0000697#endif
698
699 DMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
700
wdenkba91e262005-05-30 23:55:42 +0000701#ifdef DEBUG
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200702 tfifo_print (dev->name, fec);
wdenk983fda82004-10-28 00:09:35 +0000703#endif
704
wdenkba91e262005-05-30 23:55:42 +0000705#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000706 printf ("+");
707#endif
708
709 fec->cleanTbdNum -= 1;
710
wdenkba91e262005-05-30 23:55:42 +0000711#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000712 printf ("smartDMA ethernet Tx task enabled\n");
713#endif
714 /*
715 * wait until frame is sent .
716 */
717 while (pTbd->status & FEC_TBD_READY) {
718 udelay (10);
wdenkba91e262005-05-30 23:55:42 +0000719#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000720 printf ("TDB status = %04x\n", pTbd->status);
721#endif
722 }
723
724 return 0;
725}
726
727
728/********************************************************************/
729static int mpc8220_fec_recv (struct eth_device *dev)
730{
731 /*
732 * This command pulls one frame from the card
733 */
734 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
735 FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
736 unsigned long ievent;
737 int frame_length, len = 0;
738 NBUF *frame;
739
wdenkba91e262005-05-30 23:55:42 +0000740#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000741 printf ("mpc8220_fec_recv %d Start...\n", fec->rbdIndex);
wdenk983fda82004-10-28 00:09:35 +0000742 printf ("-");
743#endif
744
745 /*
746 * Check if any critical events have happened
747 */
748 ievent = fec->eth->ievent;
749 fec->eth->ievent = ievent;
750 if (ievent & 0x20060000) {
751 /* BABT, Rx/Tx FIFO errors */
752 mpc8220_fec_halt (dev);
753 mpc8220_fec_init (dev, NULL);
754 return 0;
755 }
756 if (ievent & 0x80000000) {
757 /* Heartbeat error */
758 fec->eth->x_cntrl |= 0x00000001;
759 }
760 if (ievent & 0x10000000) {
761 /* Graceful stop complete */
762 if (fec->eth->x_cntrl & 0x00000001) {
763 mpc8220_fec_halt (dev);
764 fec->eth->x_cntrl &= ~0x00000001;
765 mpc8220_fec_init (dev, NULL);
766 }
767 }
768
769 if (!(pRbd->status & FEC_RBD_EMPTY)) {
770 if ((pRbd->status & FEC_RBD_LAST)
771 && !(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 (0)
781 {
782 int i;
783
784 printf ("recv data hdr:");
785 for (i = 0; i < 14; i++)
786 printf ("%x ", *(frame->head + i));
787 printf ("\n");
788 }
789#endif
790 /*
791 * Fill the buffer and pass it to upper layers
792 */
793/* memcpy(buff, frame->head, 14);
794 memcpy(buff + 14, frame->data, frame_length);*/
795 NetReceive ((volatile uchar *) pRbd->dataPointer,
796 frame_length);
797 len = frame_length;
798 }
799 /*
800 * Reset buffer descriptor as empty
801 */
802 mpc8220_fec_rbd_clean (fec, pRbd);
803 }
804 DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
805 return len;
806}
807
808
809/********************************************************************/
810int mpc8220_fec_initialize (bd_t * bis)
811{
812 mpc8220_fec_priv *fec;
813
wdenke2ffd592004-12-31 09:32:47 +0000814#ifdef CONFIG_HAS_ETH1
wdenk983fda82004-10-28 00:09:35 +0000815 mpc8220_fec_priv *fec2;
816#endif
817 struct eth_device *dev;
818 char *tmp, *end;
819 char env_enetaddr[6];
820
wdenke2ffd592004-12-31 09:32:47 +0000821#ifdef CONFIG_HAS_ETH1
wdenk983fda82004-10-28 00:09:35 +0000822 char env_enet1addr[6];
823#endif
824 int i;
825
826 fec = (mpc8220_fec_priv *) malloc (sizeof (*fec));
827 dev = (struct eth_device *) malloc (sizeof (*dev));
828 memset (dev, 0, sizeof *dev);
829
830 fec->eth = (ethernet_regs *) MMAP_FEC1;
wdenke2ffd592004-12-31 09:32:47 +0000831#ifdef CONFIG_HAS_ETH1
wdenk983fda82004-10-28 00:09:35 +0000832 fec2 = (mpc8220_fec_priv *) malloc (sizeof (*fec));
833 fec2->eth = (ethernet_regs *) MMAP_FEC2;
834#endif
835 fec->tbdBase = (FEC_TBD *) FEC_BD_BASE;
836 fec->rbdBase =
837 (FEC_RBD *) (FEC_BD_BASE + FEC_TBD_NUM * sizeof (FEC_TBD));
838 fec->xcv_type = MII100;
839
840 dev->priv = (void *) fec;
841 dev->iobase = MMAP_FEC1;
842 dev->init = mpc8220_fec_init;
843 dev->halt = mpc8220_fec_halt;
844 dev->send = mpc8220_fec_send;
845 dev->recv = mpc8220_fec_recv;
846
847 sprintf (dev->name, "FEC ETHERNET");
848 eth_register (dev);
849
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200850#if defined(CONFIG_MII) || (CONFIG_COMMANDS & CFG_CMD_MII)
851 miiphy_register (dev->name,
852 fec8220_miiphy_read, fec8220_miiphy_write);
853#endif
854
wdenk983fda82004-10-28 00:09:35 +0000855 /*
856 * Try to set the mac address now. The fec mac address is
857 * a garbage after reset. When not using fec for booting
858 * the Linux fec driver will try to work with this garbage.
859 */
860 tmp = getenv ("ethaddr");
861 if (tmp) {
862 for (i = 0; i < 6; i++) {
863 env_enetaddr[i] =
864 tmp ? simple_strtoul (tmp, &end, 16) : 0;
865 if (tmp)
866 tmp = (*end) ? end + 1 : end;
867 }
868 mpc8220_fec_set_hwaddr (fec, env_enetaddr);
869 }
wdenke2ffd592004-12-31 09:32:47 +0000870#ifdef CONFIG_HAS_ETH1
wdenk983fda82004-10-28 00:09:35 +0000871 tmp = getenv ("eth1addr");
872 if (tmp) {
873 for (i = 0; i < 6; i++) {
874 env_enet1addr[i] =
875 tmp ? simple_strtoul (tmp, &end, 16) : 0;
876 if (tmp)
877 tmp = (*end) ? end + 1 : end;
878 }
879 mpc8220_fec_set_hwaddr (fec2, env_enet1addr);
880 }
881#endif
882
883 return 1;
884}
885
886/* MII-interface related functions */
887/********************************************************************/
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200888int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
wdenk983fda82004-10-28 00:09:35 +0000889{
890 ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
891 u32 reg; /* convenient holder for the PHY register */
892 u32 phy; /* convenient holder for the PHY */
893 int timeout = 0xffff;
894
895 /*
896 * reading from any PHY's register is done by properly
897 * programming the FEC's MII data register.
898 */
899 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
900 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
901
902 eth->mii_data =
903 (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy
904 | reg);
905
906 /*
907 * wait for the related interrupt
908 */
909 while ((timeout--) && (!(eth->ievent & 0x00800000)));
910
911 if (timeout == 0) {
wdenkba91e262005-05-30 23:55:42 +0000912#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000913 printf ("Read MDIO failed...\n");
914#endif
915 return -1;
916 }
917
918 /*
919 * clear mii interrupt bit
920 */
921 eth->ievent = 0x00800000;
922
923 /*
924 * it's now safe to read the PHY's register
925 */
926 *retVal = (u16) eth->mii_data;
927
928 return 0;
929}
930
931/********************************************************************/
Marian Balakowicz63ff0042005-10-28 22:30:33 +0200932int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data)
wdenk983fda82004-10-28 00:09:35 +0000933{
934 ethernet_regs *eth = (ethernet_regs *) MMAP_FEC1;
935 u32 reg; /* convenient holder for the PHY register */
936 u32 phy; /* convenient holder for the PHY */
937 int timeout = 0xffff;
938
939 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
940 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
941
942 eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
943 FEC_MII_DATA_TA | phy | reg | data);
944
945 /*
946 * wait for the MII interrupt
947 */
948 while ((timeout--) && (!(eth->ievent & 0x00800000)));
949
950 if (timeout == 0) {
wdenkba91e262005-05-30 23:55:42 +0000951#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000952 printf ("Write MDIO failed...\n");
953#endif
954 return -1;
955 }
956
957 /*
958 * clear MII interrupt bit
959 */
960 eth->ievent = 0x00800000;
961
962 return 0;
963}
964
wdenkba91e262005-05-30 23:55:42 +0000965#ifdef DEBUG
wdenk983fda82004-10-28 00:09:35 +0000966static u32 local_crc32 (char *string, unsigned int crc_value, int len)
967{
968 int i;
969 char c;
970 unsigned int crc, count;
971
972 /*
973 * crc32 algorithm
974 */
975 /*
976 * crc = 0xffffffff; * The initialized value should be 0xffffffff
977 */
978 crc = crc_value;
979
980 for (i = len; --i >= 0;) {
981 c = *string++;
982 for (count = 0; count < 8; count++) {
983 if ((c & 0x01) ^ (crc & 0x01)) {
984 crc >>= 1;
985 crc = crc ^ 0xedb88320;
986 } else {
987 crc >>= 1;
988 }
989 c >>= 1;
990 }
991 }
992
993 /*
994 * In big endian system, do byte swaping for crc value
995 */
996 return crc;
997}
998#endif /* DEBUG */
999
1000#endif /* CONFIG_MPC8220_FEC */