2 * (C) Copyright 2003-2005
3 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 * This file is based on mpc4200fec.c,
6 * (C) Copyright Motorola, Inc., 2000
11 #include <mpc5xxx_sdma.h>
16 #include "mpc5xxx_fec.h"
18 DECLARE_GLOBAL_DATA_PTR;
20 /* #define DEBUG 0x28 */
22 #if !(defined(CONFIG_MII) || defined(CONFIG_CMD_MII))
23 #error "CONFIG_MII has to be defined!"
27 static void tfifo_print(char *devname, mpc5xxx_fec_priv *fec);
28 static void rfifo_print(char *devname, mpc5xxx_fec_priv *fec);
32 static uint32 local_crc32(char *string, unsigned int crc_value, int len);
36 uint8 data[1500]; /* actual data */
37 int length; /* actual length */
38 int used; /* buffer in use or not */
39 uint8 head[16]; /* MAC header(6 + 6 + 2) + 2(aligned) */
42 int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal);
43 int fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data);
45 static int mpc5xxx_fec_init_phy(struct eth_device *dev, bd_t * bis);
47 /********************************************************************/
49 static void mpc5xxx_fec_phydump (char *devname)
52 uint8 phyAddr = CONFIG_PHY_ADDR;
54 #if CONFIG_PHY_TYPE == 0x79c874 /* AMD Am79C874 */
55 /* regs to print: 0...7, 16...19, 21, 23, 24 */
56 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0,
57 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0,
59 /* regs to print: 0...8, 16...20 */
60 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0,
61 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
65 for (i = 0; i < 32; i++) {
67 miiphy_read(devname, phyAddr, i, &phyStatus);
68 printf("Mii reg %d: 0x%04x\n", i, phyStatus);
74 /********************************************************************/
75 static int mpc5xxx_fec_rbd_init(mpc5xxx_fec_priv *fec)
81 for (ix = 0; ix < FEC_RBD_NUM; ix++) {
83 data = (char *)malloc(FEC_MAX_PKT_SIZE);
85 printf ("RBD INIT FAILED\n");
88 fec->rbdBase[ix].dataPointer = (uint32)data;
90 fec->rbdBase[ix].status = FEC_RBD_EMPTY;
91 fec->rbdBase[ix].dataLength = 0;
96 * have the last RBD to close the ring
98 fec->rbdBase[ix - 1].status |= FEC_RBD_WRAP;
104 /********************************************************************/
105 static void mpc5xxx_fec_tbd_init(mpc5xxx_fec_priv *fec)
109 for (ix = 0; ix < FEC_TBD_NUM; ix++) {
110 fec->tbdBase[ix].status = 0;
114 * Have the last TBD to close the ring
116 fec->tbdBase[ix - 1].status |= FEC_TBD_WRAP;
119 * Initialize some indices
122 fec->usedTbdIndex = 0;
123 fec->cleanTbdNum = FEC_TBD_NUM;
126 /********************************************************************/
127 static void mpc5xxx_fec_rbd_clean(mpc5xxx_fec_priv *fec, volatile FEC_RBD * pRbd)
130 * Reset buffer descriptor as empty
132 if ((fec->rbdIndex) == (FEC_RBD_NUM - 1))
133 pRbd->status = (FEC_RBD_WRAP | FEC_RBD_EMPTY);
135 pRbd->status = FEC_RBD_EMPTY;
137 pRbd->dataLength = 0;
140 * Now, we have an empty RxBD, restart the SmartDMA receive task
142 SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
147 fec->rbdIndex = (fec->rbdIndex + 1) % FEC_RBD_NUM;
150 /********************************************************************/
151 static void mpc5xxx_fec_tbd_scrub(mpc5xxx_fec_priv *fec)
153 volatile FEC_TBD *pUsedTbd;
156 printf ("tbd_scrub: fec->cleanTbdNum = %d, fec->usedTbdIndex = %d\n",
157 fec->cleanTbdNum, fec->usedTbdIndex);
161 * process all the consumed TBDs
163 while (fec->cleanTbdNum < FEC_TBD_NUM) {
164 pUsedTbd = &fec->tbdBase[fec->usedTbdIndex];
165 if (pUsedTbd->status & FEC_TBD_READY) {
167 printf("Cannot clean TBD %d, in use\n", fec->cleanTbdNum);
173 * clean this buffer descriptor
175 if (fec->usedTbdIndex == (FEC_TBD_NUM - 1))
176 pUsedTbd->status = FEC_TBD_WRAP;
178 pUsedTbd->status = 0;
181 * update some indeces for a correct handling of the TBD ring
184 fec->usedTbdIndex = (fec->usedTbdIndex + 1) % FEC_TBD_NUM;
188 /********************************************************************/
189 static void mpc5xxx_fec_set_hwaddr(mpc5xxx_fec_priv *fec, char *mac)
191 uint8 currByte; /* byte for which to compute the CRC */
192 int byte; /* loop - counter */
193 int bit; /* loop - counter */
194 uint32 crc = 0xffffffff; /* initial value */
197 * The algorithm used is the following:
198 * we loop on each of the six bytes of the provided address,
199 * and we compute the CRC by left-shifting the previous
200 * value by one position, so that each bit in the current
201 * byte of the address may contribute the calculation. If
202 * the latter and the MSB in the CRC are different, then
203 * the CRC value so computed is also ex-ored with the
204 * "polynomium generator". The current byte of the address
205 * is also shifted right by one bit at each iteration.
206 * This is because the CRC generatore in hardware is implemented
207 * as a shift-register with as many ex-ores as the radixes
208 * in the polynomium. This suggests that we represent the
209 * polynomiumm itself as a 32-bit constant.
211 for (byte = 0; byte < 6; byte++) {
212 currByte = mac[byte];
213 for (bit = 0; bit < 8; bit++) {
214 if ((currByte & 0x01) ^ (crc & 0x01)) {
216 crc = crc ^ 0xedb88320;
227 * Set individual hash table register
230 fec->eth->iaddr1 = (1 << (crc - 32));
231 fec->eth->iaddr2 = 0;
233 fec->eth->iaddr1 = 0;
234 fec->eth->iaddr2 = (1 << crc);
238 * Set physical address
240 fec->eth->paddr1 = (mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3];
241 fec->eth->paddr2 = (mac[4] << 24) + (mac[5] << 16) + 0x8808;
244 /********************************************************************/
245 static int mpc5xxx_fec_init(struct eth_device *dev, bd_t * bis)
247 mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
248 struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
251 printf ("mpc5xxx_fec_init... Begin\n");
254 mpc5xxx_fec_init_phy(dev, bis);
257 * Initialize RxBD/TxBD rings
259 mpc5xxx_fec_rbd_init(fec);
260 mpc5xxx_fec_tbd_init(fec);
263 * Clear FEC-Lite interrupt event register(IEVENT)
265 fec->eth->ievent = 0xffffffff;
268 * Set interrupt mask register
270 fec->eth->imask = 0x00000000;
273 * Set FEC-Lite receive control register(R_CNTRL):
275 if (fec->xcv_type == SEVENWIRE) {
277 * Frame length=1518; 7-wire mode
279 fec->eth->r_cntrl = 0x05ee0020; /*0x05ee0000;FIXME */
282 * Frame length=1518; MII mode;
284 fec->eth->r_cntrl = 0x05ee0024; /*0x05ee0004;FIXME */
287 fec->eth->x_cntrl = 0x00000000; /* half-duplex, heartbeat disabled */
290 * Set Opcode/Pause Duration Register
292 fec->eth->op_pause = 0x00010020; /*FIXME 0xffff0020; */
295 * Set Rx FIFO alarm and granularity value
297 fec->eth->rfifo_cntrl = 0x0c000000
298 | (fec->eth->rfifo_cntrl & ~0x0f000000);
299 fec->eth->rfifo_alarm = 0x0000030c;
301 if (fec->eth->rfifo_status & 0x00700000 ) {
302 printf("mpc5xxx_fec_init() RFIFO error\n");
307 * Set Tx FIFO granularity value
309 fec->eth->tfifo_cntrl = 0x0c000000
310 | (fec->eth->tfifo_cntrl & ~0x0f000000);
312 printf("tfifo_status: 0x%08x\n", fec->eth->tfifo_status);
313 printf("tfifo_alarm: 0x%08x\n", fec->eth->tfifo_alarm);
317 * Set transmit fifo watermark register(X_WMRK), default = 64
319 fec->eth->tfifo_alarm = 0x00000080;
320 fec->eth->x_wmrk = 0x2;
323 * Set individual address filter for unicast address
324 * and set physical address registers.
326 mpc5xxx_fec_set_hwaddr(fec, (char *)dev->enetaddr);
329 * Set multicast address filter
331 fec->eth->gaddr1 = 0x00000000;
332 fec->eth->gaddr2 = 0x00000000;
335 * Turn ON cheater FSM: ????
337 fec->eth->xmit_fsm = 0x03000000;
340 * Turn off COMM bus prefetch in the MPC5200 BestComm. It doesn't
341 * work w/ the current receive task.
343 sdma->PtdCntrl |= 0x00000001;
346 * Set priority of different initiators
348 sdma->IPR0 = 7; /* always */
349 sdma->IPR3 = 6; /* Eth RX */
350 sdma->IPR4 = 5; /* Eth Tx */
353 * Clear SmartDMA task interrupt pending bits
355 SDMA_CLEAR_IEVENT(FEC_RECV_TASK_NO);
358 * Initialize SmartDMA parameters stored in SRAM
360 *(volatile int *)FEC_TBD_BASE = (int)fec->tbdBase;
361 *(volatile int *)FEC_RBD_BASE = (int)fec->rbdBase;
362 *(volatile int *)FEC_TBD_NEXT = (int)fec->tbdBase;
363 *(volatile int *)FEC_RBD_NEXT = (int)fec->rbdBase;
366 * Enable FEC-Lite controller
368 fec->eth->ecntrl |= 0x00000006;
371 if (fec->xcv_type != SEVENWIRE)
372 mpc5xxx_fec_phydump (dev->name);
376 * Enable SmartDMA receive task
378 SDMA_TASK_ENABLE(FEC_RECV_TASK_NO);
381 printf("mpc5xxx_fec_init... Done \n");
387 /********************************************************************/
388 static int mpc5xxx_fec_init_phy(struct eth_device *dev, bd_t * bis)
390 mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
391 const uint8 phyAddr = CONFIG_PHY_ADDR; /* Only one PHY */
392 static int initialized = 0;
399 printf ("mpc5xxx_fec_init_phy... Begin\n");
403 * Initialize GPIO pins
405 if (fec->xcv_type == SEVENWIRE) {
406 /* 10MBit with 7-wire operation */
407 #if defined(CONFIG_TOTAL5200)
408 /* 7-wire and USB2 on Ethernet */
409 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00030000;
410 #else /* !CONFIG_TOTAL5200 */
412 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00020000;
413 #endif /* CONFIG_TOTAL5200 */
415 /* 100MBit with MD operation */
416 *(vu_long *)MPC5XXX_GPS_PORT_CONFIG |= 0x00050000;
420 * Clear FEC-Lite interrupt event register(IEVENT)
422 fec->eth->ievent = 0xffffffff;
425 * Set interrupt mask register
427 fec->eth->imask = 0x00000000;
430 * In original Promess-provided code PHY initialization is disabled with the
431 * following comment: "Phy initialization is DISABLED for now. There was a
432 * problem with running 100 Mbps on PRO board". Thus we temporarily disable
433 * PHY initialization for the Motion-PRO board, until a proper fix is found.
436 if (fec->xcv_type != SEVENWIRE) {
438 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
439 * and do not drop the Preamble.
441 fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); /* No MII for 7-wire mode */
444 if (fec->xcv_type != SEVENWIRE) {
446 * Initialize PHY(LXT971A):
448 * Generally, on power up, the LXT971A reads its configuration
449 * pins to check for forced operation, If not cofigured for
450 * forced operation, it uses auto-negotiation/parallel detection
451 * to automatically determine line operating conditions.
452 * If the PHY device on the other side of the link supports
453 * auto-negotiation, the LXT971A auto-negotiates with it
454 * using Fast Link Pulse(FLP) Bursts. If the PHY partner does not
455 * support auto-negotiation, the LXT971A automatically detects
456 * the presence of either link pulses(10Mbps PHY) or Idle
457 * symbols(100Mbps) and sets its operating conditions accordingly.
459 * When auto-negotiation is controlled by software, the following
460 * steps are recommended.
463 * The physical address is dependent on hardware configuration.
470 * Reset PHY, then delay 300ns
472 miiphy_write(dev->name, phyAddr, 0x0, 0x8000);
475 #if defined(CONFIG_UC101) || defined(CONFIG_MUCMC52)
476 /* Set the LED configuration Register for the UC101
478 miiphy_write(dev->name, phyAddr, 0x14, 0x4122);
480 if (fec->xcv_type == MII10) {
482 * Force 10Base-T, FDX operation
485 printf("Forcing 10 Mbps ethernet link... ");
487 miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
489 miiphy_write(dev->name, fec, phyAddr, 0x0, 0x0100);
491 miiphy_write(dev->name, phyAddr, 0x0, 0x0180);
494 do { /* wait for link status to go down */
496 if ((timeout--) == 0) {
498 printf("hmmm, should not have waited...");
502 miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
506 } while ((phyStatus & 0x0004)); /* !link up */
509 do { /* wait for link status to come back up */
511 if ((timeout--) == 0) {
512 printf("failed. Link is down.\n");
515 miiphy_read(dev->name, phyAddr, 0x1, &phyStatus);
519 } while (!(phyStatus & 0x0004)); /* !link up */
524 } else { /* MII100 */
526 * Set the auto-negotiation advertisement register bits
528 miiphy_write(dev->name, phyAddr, 0x4, 0x01e1);
531 * Set MDIO bit 0.12 = 1(&& bit 0.9=1?) to enable auto-negotiation
533 miiphy_write(dev->name, phyAddr, 0x0, 0x1200);
536 * Wait for AN completion
542 if ((timeout--) == 0) {
544 printf("PHY auto neg 0 failed...\n");
549 if (miiphy_read(dev->name, phyAddr, 0x1, &phyStatus) != 0) {
551 printf("PHY auto neg 1 failed 0x%04x...\n", phyStatus);
555 } while (!(phyStatus & 0x0004));
558 printf("PHY auto neg complete! \n");
565 if (fec->xcv_type != SEVENWIRE)
566 mpc5xxx_fec_phydump (dev->name);
571 printf("mpc5xxx_fec_init_phy... Done \n");
577 /********************************************************************/
578 static void mpc5xxx_fec_halt(struct eth_device *dev)
580 struct mpc5xxx_sdma *sdma = (struct mpc5xxx_sdma *)MPC5XXX_SDMA;
581 mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
582 int counter = 0xffff;
585 if (fec->xcv_type != SEVENWIRE)
586 mpc5xxx_fec_phydump (dev->name);
590 * mask FEC chip interrupts
595 * issue graceful stop command to the FEC transmitter if necessary
597 fec->eth->x_cntrl |= 0x00000001;
600 * wait for graceful stop to register
602 while ((counter--) && (!(fec->eth->ievent & 0x10000000))) ;
605 * Disable SmartDMA tasks
607 SDMA_TASK_DISABLE (FEC_XMIT_TASK_NO);
608 SDMA_TASK_DISABLE (FEC_RECV_TASK_NO);
611 * Turn on COMM bus prefetch in the MPC5200 BestComm after we're
612 * done. It doesn't work w/ the current receive task.
614 sdma->PtdCntrl &= ~0x00000001;
617 * Disable the Ethernet Controller
619 fec->eth->ecntrl &= 0xfffffffd;
622 * Clear FIFO status registers
624 fec->eth->rfifo_status &= 0x00700000;
625 fec->eth->tfifo_status &= 0x00700000;
627 fec->eth->reset_cntrl = 0x01000000;
630 * Issue a reset command to the FEC chip
632 fec->eth->ecntrl |= 0x1;
635 * wait at least 16 clock cycles
639 /* don't leave the MII speed set to zero */
640 if (fec->xcv_type != SEVENWIRE) {
642 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
643 * and do not drop the Preamble.
645 fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); /* No MII for 7-wire mode */
649 printf("Ethernet task stopped\n");
654 /********************************************************************/
656 static void tfifo_print(char *devname, mpc5xxx_fec_priv *fec)
658 uint16 phyAddr = CONFIG_PHY_ADDR;
661 if ((fec->eth->tfifo_lrf_ptr != fec->eth->tfifo_lwf_ptr)
662 || (fec->eth->tfifo_rdptr != fec->eth->tfifo_wrptr)) {
664 miiphy_read(devname, phyAddr, 0x1, &phyStatus);
665 printf("\nphyStatus: 0x%04x\n", phyStatus);
666 printf("ecntrl: 0x%08x\n", fec->eth->ecntrl);
667 printf("ievent: 0x%08x\n", fec->eth->ievent);
668 printf("x_status: 0x%08x\n", fec->eth->x_status);
669 printf("tfifo: status 0x%08x\n", fec->eth->tfifo_status);
671 printf(" control 0x%08x\n", fec->eth->tfifo_cntrl);
672 printf(" lrfp 0x%08x\n", fec->eth->tfifo_lrf_ptr);
673 printf(" lwfp 0x%08x\n", fec->eth->tfifo_lwf_ptr);
674 printf(" alarm 0x%08x\n", fec->eth->tfifo_alarm);
675 printf(" readptr 0x%08x\n", fec->eth->tfifo_rdptr);
676 printf(" writptr 0x%08x\n", fec->eth->tfifo_wrptr);
680 static void rfifo_print(char *devname, mpc5xxx_fec_priv *fec)
682 uint16 phyAddr = CONFIG_PHY_ADDR;
685 if ((fec->eth->rfifo_lrf_ptr != fec->eth->rfifo_lwf_ptr)
686 || (fec->eth->rfifo_rdptr != fec->eth->rfifo_wrptr)) {
688 miiphy_read(devname, phyAddr, 0x1, &phyStatus);
689 printf("\nphyStatus: 0x%04x\n", phyStatus);
690 printf("ecntrl: 0x%08x\n", fec->eth->ecntrl);
691 printf("ievent: 0x%08x\n", fec->eth->ievent);
692 printf("x_status: 0x%08x\n", fec->eth->x_status);
693 printf("rfifo: status 0x%08x\n", fec->eth->rfifo_status);
695 printf(" control 0x%08x\n", fec->eth->rfifo_cntrl);
696 printf(" lrfp 0x%08x\n", fec->eth->rfifo_lrf_ptr);
697 printf(" lwfp 0x%08x\n", fec->eth->rfifo_lwf_ptr);
698 printf(" alarm 0x%08x\n", fec->eth->rfifo_alarm);
699 printf(" readptr 0x%08x\n", fec->eth->rfifo_rdptr);
700 printf(" writptr 0x%08x\n", fec->eth->rfifo_wrptr);
705 /********************************************************************/
707 static int mpc5xxx_fec_send(struct eth_device *dev, volatile void *eth_data,
711 * This routine transmits one frame. This routine only accepts
712 * 6-byte Ethernet addresses.
714 mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
715 volatile FEC_TBD *pTbd;
718 printf("tbd status: 0x%04x\n", fec->tbdBase[0].status);
719 tfifo_print(dev->name, fec);
723 * Clear Tx BD ring at first
725 mpc5xxx_fec_tbd_scrub(fec);
728 * Check for valid length of data.
730 if ((data_length > 1500) || (data_length <= 0)) {
735 * Check the number of vacant TxBDs.
737 if (fec->cleanTbdNum < 1) {
739 printf("No available TxBDs ...\n");
745 * Get the first TxBD to send the mac header
747 pTbd = &fec->tbdBase[fec->tbdIndex];
748 pTbd->dataLength = data_length;
749 pTbd->dataPointer = (uint32)eth_data;
750 pTbd->status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
751 fec->tbdIndex = (fec->tbdIndex + 1) % FEC_TBD_NUM;
754 printf("SDMA_TASK_ENABLE, fec->tbdIndex = %d \n", fec->tbdIndex);
760 if (fec->xcv_type != SEVENWIRE) {
762 miiphy_read(dev->name, 0, 0x1, &phyStatus);
766 * Enable SmartDMA transmit task
770 tfifo_print(dev->name, fec);
772 SDMA_TASK_ENABLE (FEC_XMIT_TASK_NO);
774 tfifo_print(dev->name, fec);
780 fec->cleanTbdNum -= 1;
782 #if (DEBUG & 0x129) && (DEBUG & 0x80000000)
783 printf ("smartDMA ethernet Tx task enabled\n");
786 * wait until frame is sent .
788 while (pTbd->status & FEC_TBD_READY) {
791 printf ("TDB status = %04x\n", pTbd->status);
799 /********************************************************************/
800 static int mpc5xxx_fec_recv(struct eth_device *dev)
803 * This command pulls one frame from the card
805 mpc5xxx_fec_priv *fec = (mpc5xxx_fec_priv *)dev->priv;
806 volatile FEC_RBD *pRbd = &fec->rbdBase[fec->rbdIndex];
807 unsigned long ievent;
808 int frame_length, len = 0;
810 uchar buff[FEC_MAX_PKT_SIZE];
813 printf ("mpc5xxx_fec_recv %d Start...\n", fec->rbdIndex);
820 * Check if any critical events have happened
822 ievent = fec->eth->ievent;
823 fec->eth->ievent = ievent;
824 if (ievent & 0x20060000) {
825 /* BABT, Rx/Tx FIFO errors */
826 mpc5xxx_fec_halt(dev);
827 mpc5xxx_fec_init(dev, NULL);
830 if (ievent & 0x80000000) {
831 /* Heartbeat error */
832 fec->eth->x_cntrl |= 0x00000001;
834 if (ievent & 0x10000000) {
835 /* Graceful stop complete */
836 if (fec->eth->x_cntrl & 0x00000001) {
837 mpc5xxx_fec_halt(dev);
838 fec->eth->x_cntrl &= ~0x00000001;
839 mpc5xxx_fec_init(dev, NULL);
843 if (!(pRbd->status & FEC_RBD_EMPTY)) {
844 if ((pRbd->status & FEC_RBD_LAST) && !(pRbd->status & FEC_RBD_ERR) &&
845 ((pRbd->dataLength - 4) > 14)) {
848 * Get buffer address and size
850 frame = (NBUF *)pRbd->dataPointer;
851 frame_length = pRbd->dataLength - 4;
856 printf("recv data hdr:");
857 for (i = 0; i < 14; i++)
858 printf("%x ", *(frame->head + i));
863 * Fill the buffer and pass it to upper layers
865 memcpy(buff, frame->head, 14);
866 memcpy(buff + 14, frame->data, frame_length);
867 NetReceive(buff, frame_length);
871 * Reset buffer descriptor as empty
873 mpc5xxx_fec_rbd_clean(fec, pRbd);
875 SDMA_CLEAR_IEVENT (FEC_RECV_TASK_NO);
880 /********************************************************************/
881 int mpc5xxx_fec_initialize(bd_t * bis)
883 mpc5xxx_fec_priv *fec;
884 struct eth_device *dev;
886 char env_enetaddr[6];
889 fec = (mpc5xxx_fec_priv *)malloc(sizeof(*fec));
890 dev = (struct eth_device *)malloc(sizeof(*dev));
891 memset(dev, 0, sizeof *dev);
893 fec->eth = (ethernet_regs *)MPC5XXX_FEC;
894 fec->tbdBase = (FEC_TBD *)FEC_BD_BASE;
895 fec->rbdBase = (FEC_RBD *)(FEC_BD_BASE + FEC_TBD_NUM * sizeof(FEC_TBD));
896 #if defined(CONFIG_MPC5xxx_FEC_MII100)
897 fec->xcv_type = MII100;
898 #elif defined(CONFIG_MPC5xxx_FEC_MII10)
899 fec->xcv_type = MII10;
900 #elif defined(CONFIG_MPC5xxx_FEC_SEVENWIRE)
901 fec->xcv_type = SEVENWIRE;
903 #error fec->xcv_type not initialized.
905 if (fec->xcv_type != SEVENWIRE) {
907 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
908 * and do not drop the Preamble.
910 fec->eth->mii_speed = (((gd->ipb_clk >> 20) / 5) << 1); /* No MII for 7-wire mode */
913 dev->priv = (void *)fec;
914 dev->iobase = MPC5XXX_FEC;
915 dev->init = mpc5xxx_fec_init;
916 dev->halt = mpc5xxx_fec_halt;
917 dev->send = mpc5xxx_fec_send;
918 dev->recv = mpc5xxx_fec_recv;
920 sprintf(dev->name, "FEC ETHERNET");
923 #if defined(CONFIG_MII) || defined(CONFIG_CMD_MII)
924 miiphy_register (dev->name,
925 fec5xxx_miiphy_read, fec5xxx_miiphy_write);
929 * Try to set the mac address now. The fec mac address is
930 * a garbage after reset. When not using fec for booting
931 * the Linux fec driver will try to work with this garbage.
933 tmp = getenv("ethaddr");
935 for (i=0; i<6; i++) {
936 env_enetaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
938 tmp = (*end) ? end+1 : end;
940 mpc5xxx_fec_set_hwaddr(fec, env_enetaddr);
946 /* MII-interface related functions */
947 /********************************************************************/
948 int fec5xxx_miiphy_read(char *devname, uint8 phyAddr, uint8 regAddr, uint16 * retVal)
950 ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
951 uint32 reg; /* convenient holder for the PHY register */
952 uint32 phy; /* convenient holder for the PHY */
953 int timeout = 0xffff;
956 * reading from any PHY's register is done by properly
957 * programming the FEC's MII data register.
959 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
960 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
962 eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA | phy | reg);
965 * wait for the related interrupt
967 while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
971 printf ("Read MDIO failed...\n");
977 * clear mii interrupt bit
979 eth->ievent = 0x00800000;
982 * it's now safe to read the PHY's register
984 *retVal = (uint16) eth->mii_data;
989 /********************************************************************/
990 int fec5xxx_miiphy_write(char *devname, uint8 phyAddr, uint8 regAddr, uint16 data)
992 ethernet_regs *eth = (ethernet_regs *)MPC5XXX_FEC;
993 uint32 reg; /* convenient holder for the PHY register */
994 uint32 phy; /* convenient holder for the PHY */
995 int timeout = 0xffff;
997 reg = regAddr << FEC_MII_DATA_RA_SHIFT;
998 phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
1000 eth->mii_data = (FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
1001 FEC_MII_DATA_TA | phy | reg | data);
1004 * wait for the MII interrupt
1006 while ((timeout--) && (!(eth->ievent & 0x00800000))) ;
1010 printf ("Write MDIO failed...\n");
1016 * clear MII interrupt bit
1018 eth->ievent = 0x00800000;
1024 static uint32 local_crc32(char *string, unsigned int crc_value, int len)
1028 unsigned int crc, count;
1034 * crc = 0xffffffff; * The initialized value should be 0xffffffff
1038 for (i = len; --i >= 0;) {
1040 for (count = 0; count < 8; count++) {
1041 if ((c & 0x01) ^ (crc & 0x01)) {
1043 crc = crc ^ 0xedb88320;
1052 * In big endian system, do byte swaping for crc value