3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * This file is based on mpc4200fec.c,
6 * (C) Copyright Motorola, Inc., 2000
18 #if defined(CONFIG_CMD_NET) && defined(CONFIG_NET_MULTI) && \
19 defined(CONFIG_MPC8220_FEC)
21 #if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
22 #error "CONFIG_MII has to be defined!"
26 static void tfifo_print (char *devname, mpc8220_fec_priv * fec);
27 static void rfifo_print (char *devname, mpc8220_fec_priv * fec);
31 static u32 local_crc32 (char *string, unsigned int crc_value, int len);
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) */
41 int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal);
42 int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data);
44 /********************************************************************/
46 static void mpc8220_fec_phydump (char *devname)
49 u8 phyAddr = CONFIG_PHY_ADDR;
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,
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,
62 for (i = 0; i < 32; i++) {
64 miiphy_read (devname, phyAddr, i, &phyStatus);
65 printf ("Mii reg %d: 0x%04x\n", i, phyStatus);
71 /********************************************************************/
72 static int mpc8220_fec_rbd_init (mpc8220_fec_priv * fec)
78 for (ix = 0; ix < FEC_RBD_NUM; ix++) {
80 data = (char *) malloc (FEC_MAX_PKT_SIZE);
82 printf ("RBD INIT FAILED\n");
85 fec->rbdBase[ix].dataPointer = (u32) data;
87 fec->rbdBase[ix].status = FEC_RBD_EMPTY;
88 fec->rbdBase[ix].dataLength = 0;
93 * have the last RBD to close the ring
95 fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
101 /********************************************************************/
102 static void mpc8220_fec_tbd_init (mpc8220_fec_priv * fec)
106 for (ix = 0; ix < FEC_TBD_NUM; ix++) {
107 fec->tbdBase[ix].status = 0;
111 * Have the last TBD to close the ring
113 fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
116 * Initialize some indices
119 fec->usedTbdIndex = 0;
120 fec->cleanTbdNum = FEC_TBD_NUM;
123 /********************************************************************/
124 static void mpc8220_fec_rbd_clean (mpc8220_fec_priv * fec, FEC_RBD * pRbd)
127 * Reset buffer descriptor as empty
129 if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
130 pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
132 pRbd->status = FEC_RBD_EMPTY;
134 pRbd->dataLength = 0;
137 * Now, we have an empty RxBD, restart the SmartDMA receive task
139 DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
144 fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
147 /********************************************************************/
148 static void mpc8220_fec_tbd_scrub (mpc8220_fec_priv * fec)
153 printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
154 fec->cleanTbdNum, fec->usedTbdIndex);
158 * process all the consumed TBDs
160 while (fec->cleanTbdNum < FEC_TBD_NUM) {
161 pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
162 if (pUsedTbd->status & FEC_TBD_READY) {
164 printf ("Cannot clean TBD %d, in use\n",
171 * clean this buffer descriptor
173 if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
174 pUsedTbd->status = FEC_TBD_WRAP;
176 pUsedTbd->status = 0;
179 * update some indeces for a correct handling of the TBD ring
182 fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
186 /********************************************************************/
187 static void mpc8220_fec_set_hwaddr (mpc8220_fec_priv * fec, char *mac)
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 */
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.
209 for (byte = 0; byte < 6; byte++) {
210 currByte = mac[byte];
211 for (bit = 0; bit < 8; bit++) {
212 if ((currByte & 0x01) ^ (crc & 0x01)) {
214 crc = crc ^ 0xedb88320;
225 * Set individual hash table register
228 fec->eth->iaddr1 = (1 << (crc - 32));
229 fec->eth->iaddr2 = 0;
231 fec->eth->iaddr1 = 0;
232 fec->eth->iaddr2 = (1 << crc);
236 * Set physical address
239 (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
240 fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
243 /********************************************************************/
244 static int mpc8220_fec_init (struct eth_device *dev, bd_t * bis)
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 */
251 printf ("mpc8220_fec_init... Begin\n");
255 * Initialize RxBD/TxBD rings
257 mpc8220_fec_rbd_init (fec);
258 mpc8220_fec_tbd_init (fec);
261 * Set up Pin Muxing for FEC 1
263 *(vu_long *) MMAP_PCFG = 0;
264 *(vu_long *) (MMAP_PCFG + 4) = 0;
266 * Clear FEC-Lite interrupt event register(IEVENT)
268 fec->eth->ievent = 0xffffffff;
271 * Set interrupt mask register
273 fec->eth->imask = 0x00000000;
276 * Set FEC-Lite receive control register(R_CNTRL):
278 if (fec->xcv_type == SEVENWIRE) {
280 * Frame length=1518; 7-wire mode
282 fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
285 * Frame length=1518; MII mode;
287 fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
290 fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
291 if (fec->xcv_type != SEVENWIRE) {
293 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
294 * and do not drop the Preamble.
297 /*fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); */
298 /* No MII for 7-wire mode */
299 fec->eth->mii_speed = 0x00000030;
303 * Set Opcode/Pause Duration Register
305 fec->eth->op_pause = 0x00010020; /*FIXME0xffff0020; */
308 * Set Rx FIFO alarm and granularity value
310 fec->eth->rfifo_cntrl = 0x0c000000;
311 fec->eth->rfifo_alarm = 0x0000030c;
313 if (fec->eth->rfifo_status & 0x00700000) {
314 printf ("mpc8220_fec_init() RFIFO error\n");
319 * Set Tx FIFO granularity value
321 /*fec->eth->tfifo_cntrl = 0x0c000000; */ /*tbd - rtm */
322 fec->eth->tfifo_cntrl = 0x0e000000;
324 printf ("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
325 printf ("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
329 * Set transmit fifo watermark register(X_WMRK), default = 64
331 fec->eth->tfifo_alarm = 0x00000080;
332 fec->eth->x_wmrk = 0x2;
335 * Set individual address filter for unicast address
336 * and set physical address registers.
338 mpc8220_fec_set_hwaddr (fec, (char *)(dev->enetaddr));
341 * Set multicast address filter
343 fec->eth->gaddr1 = 0x00000000;
344 fec->eth->gaddr2 = 0x00000000;
347 * Turn ON cheater FSM: ????
349 fec->eth->xmit_fsm = 0x03000000;
352 /*#if defined(CONFIG_MPC5200)*/
354 * Turn off COMM bus prefetch in the MGT5200 BestComm. It doesn't
355 * work w/ the current receive task.
357 dma->PtdCntrl |= 0x00000001;
361 * Set priority of different initiators
363 dma->IPR0 = 7; /* always */
364 dma->IPR3 = 6; /* Eth RX */
365 dma->IPR4 = 5; /* Eth Tx */
368 * Clear SmartDMA task interrupt pending bits
370 DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
373 * Initialize SmartDMA parameters stored in SRAM
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;
380 if (fec->xcv_type != SEVENWIRE) {
382 * Initialize PHY(LXT971A):
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.
395 * When auto-negotiation is controlled by software, the following
396 * steps are recommended.
399 * The physical address is dependent on hardware configuration.
406 * Reset PHY, then delay 300ns
408 miiphy_write (dev->name, phyAddr, 0x0, 0x8000);
411 if (fec->xcv_type == MII10) {
413 * Force 10Base-T, FDX operation
416 printf ("Forcing 10 Mbps ethernet link... ");
418 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
420 miiphy_write(fec, phyAddr, 0x0, 0x0100);
422 miiphy_write (dev->name, phyAddr, 0x0, 0x0180);
425 do { /* wait for link status to go down */
427 if ((timeout--) == 0) {
429 printf ("hmmm, should not have waited...");
433 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
437 } while ((phyStatus & 0x0004)); /* !link up */
440 do { /* wait for link status to come back up */
442 if ((timeout--) == 0) {
443 printf ("failed. Link is down.\n");
446 miiphy_read (dev->name, phyAddr, 0x1, &phyStatus);
450 } while (!(phyStatus & 0x0004)); /* !link up */
455 } else { /* MII100 */
457 * Set the auto-negotiation advertisement register bits
459 miiphy_write (dev->name, phyAddr, 0x4, 0x01e1);
462 * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
464 miiphy_write (dev->name, phyAddr, 0x0, 0x1200);
467 * Wait for AN completion
473 if ((timeout--) == 0) {
475 printf ("PHY auto neg 0 failed...\n");
480 if (miiphy_read (dev->name, phyAddr, 0x1, &phyStatus) !=
483 printf ("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
487 } while (!(phyStatus & 0x0004));
490 printf ("PHY auto neg complete! \n");
497 * Enable FEC-Lite controller
499 fec->eth->ecntrl |= 0x00000006;
502 if (fec->xcv_type != SEVENWIRE)
503 mpc8220_fec_phydump (dev->name);
507 * Enable SmartDMA receive task
509 DMA_TASK_ENABLE (FEC_RECV_TASK_NO);
512 printf ("mpc8220_fec_init... Done \n");
518 /********************************************************************/
519 static void mpc8220_fec_halt (struct eth_device *dev)
521 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
522 int counter = 0xffff;
525 if (fec->xcv_type != SEVENWIRE)
526 mpc8220_fec_phydump (dev->name);
530 * mask FEC chip interrupts
535 * issue graceful stop command to the FEC transmitter if necessary
537 fec->eth->x_cntrl |= 0x00000001;
540 * wait for graceful stop to register
542 while ((counter--) && (!(fec->eth->ievent & 0x10000000)));
545 * Disable SmartDMA tasks
547 DMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
548 DMA_TASK_DISABLE (FEC_RECV_TASK_NO);
551 * Disable the Ethernet Controller
553 fec->eth->ecntrl &= 0xfffffffd;
556 * Clear FIFO status registers
558 fec->eth->rfifo_status &= 0x00700000;
559 fec->eth->tfifo_status &= 0x00700000;
561 fec->eth->reset_cntrl = 0x01000000;
564 * Issue a reset command to the FEC chip
566 fec->eth->ecntrl |= 0x1;
569 * wait at least 16 clock cycles
574 printf ("Ethernet task stopped\n");
579 /********************************************************************/
581 static void tfifo_print (char *devname, mpc8220_fec_priv * fec)
583 u16 phyAddr = CONFIG_PHY_ADDR;
586 if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
587 || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
589 miiphy_read (devname, phyAddr, 0x1, &phyStatus);
590 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);
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);
605 static void rfifo_print (char *devname, mpc8220_fec_priv * fec)
607 u16 phyAddr = CONFIG_PHY_ADDR;
610 if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
611 || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
613 miiphy_read (devname, phyAddr, 0x1, &phyStatus);
614 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);
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);
630 /********************************************************************/
632 static int mpc8220_fec_send (struct eth_device *dev, volatile void *eth_data,
636 * This routine transmits one frame. This routine only accepts
637 * 6-byte Ethernet addresses.
639 mpc8220_fec_priv *fec = (mpc8220_fec_priv *) dev->priv;
643 printf ("tbd status: 0x%04x\n", fec->tbdBase[0].status);
644 tfifo_print (dev->name, fec);
648 * Clear Tx BD ring at first
650 mpc8220_fec_tbd_scrub (fec);
653 * Check for valid length of data.
655 if ((data_length > 1500) || (data_length <= 0)) {
660 * Check the number of vacant TxBDs.
662 if (fec->cleanTbdNum < 1) {
664 printf ("No available TxBDs ...\n");
670 * Get the first TxBD to send the mac header
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;
679 printf ("DMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
685 if (fec->xcv_type != SEVENWIRE) {
688 miiphy_read (dev->name, 0, 0x1, &phyStatus);
692 * Enable SmartDMA transmit task
696 tfifo_print (dev->name, fec);
699 DMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
702 tfifo_print (dev->name, fec);
709 fec->cleanTbdNum -= 1;
712 printf ("smartDMA ethernet Tx task enabled\n");
715 * wait until frame is sent .
717 while (pTbd->status & FEC_TBD_READY) {
720 printf ("TDB status = %04x\n", pTbd->status);
728 /********************************************************************/
729 static int mpc8220_fec_recv (struct eth_device *dev)
732 * This command pulls one frame from the card
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;
741 printf ("mpc8220_fec_recv %d Start...\n", fec->rbdIndex);
746 * Check if any critical events have happened
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);
756 if (ievent & 0x80000000) {
757 /* Heartbeat error */
758 fec->eth->x_cntrl |= 0x00000001;
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);
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)) {
775 * Get buffer address and size
777 frame = (NBUF *) pRbd->dataPointer;
778 frame_length = pRbd->dataLength - 4;
784 printf ("recv data hdr:");
785 for (i = 0; i < 14; i++)
786 printf ("%x ", *(frame->head + i));
791 * Fill the buffer and pass it to upper layers
793 /* memcpy(buff, frame->head, 14);
794 memcpy(buff + 14, frame->data, frame_length);*/
795 NetReceive ((volatile uchar *) pRbd->dataPointer,
800 * Reset buffer descriptor as empty
802 mpc8220_fec_rbd_clean (fec, pRbd);
804 DMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
809 /********************************************************************/
810 int mpc8220_fec_initialize (bd_t * bis)
812 mpc8220_fec_priv *fec;
814 #ifdef CONFIG_HAS_ETH1
815 mpc8220_fec_priv *fec2;
817 struct eth_device *dev;
819 char env_enetaddr[6];
821 #ifdef CONFIG_HAS_ETH1
822 char env_enet1addr[6];
826 fec = (mpc8220_fec_priv *) malloc (sizeof (*fec));
827 dev = (struct eth_device *) malloc (sizeof (*dev));
828 memset (dev, 0, sizeof *dev);
830 fec->eth = (ethernet_regs *) MMAP_FEC1;
831 #ifdef CONFIG_HAS_ETH1
832 fec2 = (mpc8220_fec_priv *) malloc (sizeof (*fec));
833 fec2->eth = (ethernet_regs *) MMAP_FEC2;
835 fec->tbdBase = (FEC_TBD *) FEC_BD_BASE;
837 (FEC_RBD *) (FEC_BD_BASE + FEC_TBD_NUM * sizeof (FEC_TBD));
838 fec->xcv_type = MII100;
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;
847 sprintf (dev->name, "FEC ETHERNET");
850 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
851 miiphy_register (dev->name,
852 fec8220_miiphy_read, fec8220_miiphy_write);
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.
860 tmp = getenv ("ethaddr");
862 for (i = 0; i < 6; i++) {
864 tmp ? simple_strtoul (tmp, &end, 16) : 0;
866 tmp = (*end) ? end + 1 : end;
868 mpc8220_fec_set_hwaddr (fec, env_enetaddr);
870 #ifdef CONFIG_HAS_ETH1
871 tmp = getenv ("eth1addr");
873 for (i = 0; i < 6; i++) {
875 tmp ? simple_strtoul (tmp, &end, 16) : 0;
877 tmp = (*end) ? end + 1 : end;
879 mpc8220_fec_set_hwaddr (fec2, env_enet1addr);
886 /* MII-interface related functions */
887 /********************************************************************/
888 int fec8220_miiphy_read (char *devname, u8 phyAddr, u8 regAddr, u16 * retVal)
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;
896 * reading from any PHY's register is done by properly
897 * programming the FEC's MII data register.
899 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
900 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
903 (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy
907 * wait for the related interrupt
909 while ((timeout--) && (!(eth->ievent & 0x00800000)));
913 printf ("Read MDIO failed...\n");
919 * clear mii interrupt bit
921 eth->ievent = 0x00800000;
924 * it's now safe to read the PHY's register
926 *retVal = (u16) eth->mii_data;
931 /********************************************************************/
932 int fec8220_miiphy_write (char *devname, u8 phyAddr, u8 regAddr, u16 data)
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;
939 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
940 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
942 eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
943 FEC_MII_DATA_TA | phy | reg | data);
946 * wait for the MII interrupt
948 while ((timeout--) && (!(eth->ievent & 0x00800000)));
952 printf ("Write MDIO failed...\n");
958 * clear MII interrupt bit
960 eth->ievent = 0x00800000;
966 static u32 local_crc32 (char *string, unsigned int crc_value, int len)
970 unsigned int crc, count;
976 * crc = 0xffffffff; * The initialized value should be 0xffffffff
980 for (i = len; --i >= 0;) {
982 for (count = 0; count < 8; count++) {
983 if ((c & 0x01) ^ (crc & 0x01)) {
985 crc = crc ^ 0xedb88320;
994 * In big endian system, do byte swaping for crc value
1000 #endif /* CONFIG_MPC8220_FEC */