ether_fcc.c.svn-base

u-boot for S3c2443 processor

		n--;
	}

	lp = (ulong *)bp;
	nl = n / sizeof (ulong);
	n -= nl * sizeof (ulong);

	while (nl > 0) {
		ulong diff;

		diff = *lp++ ^ pat;

		if (diff)
			cnt += nbs (diff, 32);

		nl--;
	}

	bp = (uchar *)lp;

	while (n > 0) {
		uchar diff;

		diff = *bp++ ^ (uchar)pat;

		if (diff)
			cnt += nbs ((ulong)diff, 8);

		n--;
	}

	return (cnt);
}

static inline unsigned short
swap16 (unsigned short x)
{
	return (((x & 0xff) << 8) | ((x & 0xff00) >> 8));
}

void
eth_loopback_test (void)
{
	DECLARE_GLOBAL_DATA_PTR;

	volatile immap_t *immr = (immap_t *)CFG_IMMR;
	volatile cpm8260_t *cp = &(immr->im_cpm);
	int c, nclosed;
	ulong runtime, nmsec;
	uchar *bases[3];

	puts ("FCC Ethernet External loopback test\n");

	memcpy (NetOurEther, gd->bd->bi_enetaddr, 6);

	/*
	 * global initialisations for all FCC channels
	 */

	/* 28.9 - (1-2): ioports have been set up already */

#if defined(CONFIG_HYMOD)
	/*
	 * Attention: this is board-specific
	 * 0, FCC1
	 * 1, FCC2
	 * 2, FCC3
	 */
#       define FCC_START_LOOP 0
#       define FCC_END_LOOP   2

	/*
	 * Attention: this is board-specific
	 * - FCC1 Rx-CLK is CLK10
	 * - FCC1 Tx-CLK is CLK11
	 * - FCC2 Rx-CLK is CLK13
	 * - FCC2 Tx-CLK is CLK14
	 * - FCC3 Rx-CLK is CLK15
	 * - FCC3 Tx-CLK is CLK16
	 */

	/* 28.9 - (3): connect FCC's tx and rx clocks */
	immr->im_cpmux.cmx_uar = 0;
	immr->im_cpmux.cmx_fcr = CMXFCR_RF1CS_CLK10|CMXFCR_TF1CS_CLK11|\
	    CMXFCR_RF2CS_CLK13|CMXFCR_TF2CS_CLK14|\
	    CMXFCR_RF3CS_CLK15|CMXFCR_TF3CS_CLK16;
#elif defined(CONFIG_SBC8260) || defined(CONFIG_SACSng)
	/*
	 * Attention: this is board-specific
	 * 1, FCC2
	 */
#       define FCC_START_LOOP 1
#       define FCC_END_LOOP   1

	/*
	 * Attention: this is board-specific
	 * - FCC2 Rx-CLK is CLK13
	 * - FCC2 Tx-CLK is CLK14
	 */

	/* 28.9 - (3): connect FCC's tx and rx clocks */
	immr->im_cpmux.cmx_uar = 0;
	immr->im_cpmux.cmx_fcr = CMXFCR_RF2CS_CLK13|CMXFCR_TF2CS_CLK14;
#else
#error "eth_loopback_test not supported on your board"
#endif

	puts ("Initialise FCC channels:");

	for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++) {
		elbt_chan *ecp = &elbt_chans[c];
		volatile fcc_t *fcp = &immr->im_fcc[c];
		volatile fcc_enet_t *fpp;
		int i;
		ulong addr;

		/*
		 * initialise channel data
		 */

		printf (" %d", c);

		memset ((void *)ecp, 0, sizeof (*ecp));

		ecp->state = Idle;

		switch (c) {

		case 0: /* FCC1 */
			ecp->proff = PROFF_FCC1;
			ecp->page = CPM_CR_FCC1_PAGE;
			ecp->sblock = CPM_CR_FCC1_SBLOCK;
			break;

		case 1: /* FCC2 */
			ecp->proff = PROFF_FCC2;
			ecp->page = CPM_CR_FCC2_PAGE;
			ecp->sblock = CPM_CR_FCC2_SBLOCK;
			break;

		case 2: /* FCC3 */
			ecp->proff = PROFF_FCC3;
			ecp->page = CPM_CR_FCC3_PAGE;
			ecp->sblock = CPM_CR_FCC3_SBLOCK;
			break;
		}

		/*
		 * set up tx buffers and bds
		 */

		for (i = 0; i < ELBT_NTXBD; i++) {
			cbd_t *bdp = &ecp->txbd[i];
			uchar *bp = &ecp->txbufs[i][0];

			bdp->cbd_bufaddr = (uint)bp;
			/* room for crc */
			bdp->cbd_datlen = ELBT_BUFSZ - ELBT_CRCSZ;
			bdp->cbd_sc = BD_ENET_TX_READY | BD_ENET_TX_PAD | \
				BD_ENET_TX_LAST | BD_ENET_TX_TC;

			memset ((void *)bp, patbytes[i], ELBT_BUFSZ);
			NetSetEther (bp, NetBcastAddr, 0x8000);
		}
		ecp->txbd[ELBT_NTXBD - 1].cbd_sc |= BD_ENET_TX_WRAP;

		/*
		 * set up rx buffers and bds
		 */

		for (i = 0; i < ELBT_NRXBD; i++) {
		    cbd_t *bdp = &ecp->rxbd[i];
		    uchar *bp = &ecp->rxbufs[i][0];

		    bdp->cbd_bufaddr = (uint)bp;
		    bdp->cbd_datlen = 0;
		    bdp->cbd_sc = BD_ENET_RX_EMPTY;

		    memset ((void *)bp, 0, ELBT_BUFSZ);
		}
		ecp->rxbd[ELBT_NRXBD - 1].cbd_sc |= BD_ENET_RX_WRAP;

		/*
		 * set up the FCC channel hardware
		 */

		/* 28.9 - (4): GFMR: disable tx/rx, CCITT CRC, Mode Ethernet */
		fcp->fcc_gfmr = FCC_GFMR_MODE_ENET | FCC_GFMR_TCRC_32;

		/* 28.9 - (5): FPSMR: fd, enet CRC, Promis, RMON, Rx SHort */
		fcp->fcc_fpsmr = FCC_PSMR_FDE | FCC_PSMR_LPB | \
			FCC_PSMR_ENCRC | FCC_PSMR_PRO | \
			FCC_PSMR_MON | FCC_PSMR_RSH;

		/* 28.9 - (6): FDSR: Ethernet Syn */
		fcp->fcc_fdsr = 0xD555;

		/* 29.9 - (7): initialise parameter ram */
		fpp = (fcc_enet_t *)&(immr->im_dprambase[ecp->proff]);

		/* clear whole struct to make sure all resv fields are zero */
		memset ((void *)fpp, 0, sizeof (fcc_enet_t));

		/*
		 * common Parameter RAM area
		 *
		 * Allocate space in the reserved FCC area of DPRAM for the
		 * internal buffers.  No one uses this space (yet), so we
		 * can do this.  Later, we will add resource management for
		 * this area.
		 */
		addr = CPM_FCC_SPECIAL_BASE + (c * 64);
		fpp->fen_genfcc.fcc_riptr = addr;
		fpp->fen_genfcc.fcc_tiptr = addr + 32;

		/*
		 * Set maximum bytes per receive buffer.
		 * It must be a multiple of 32.
		 * buffers are in 60x bus memory.
		 */
		fpp->fen_genfcc.fcc_mrblr = PKT_MAXBLR_SIZE;
		fpp->fen_genfcc.fcc_rstate = (CPMFCR_GBL | CPMFCR_EB) << 24;
		fpp->fen_genfcc.fcc_rbase = (unsigned int)(&ecp->rxbd[0]);
		fpp->fen_genfcc.fcc_tstate = (CPMFCR_GBL | CPMFCR_EB) << 24;
		fpp->fen_genfcc.fcc_tbase = (unsigned int)(&ecp->txbd[0]);

		/* protocol-specific area */
		fpp->fen_cmask = 0xdebb20e3;	/* CRC mask */
		fpp->fen_cpres = 0xffffffff;	/* CRC preset */
		fpp->fen_retlim = 15;		/* Retry limit threshold */
		fpp->fen_mflr = PKT_MAXBUF_SIZE;/* max frame length register */

		/*
		 * Set Ethernet station address.
		 *
		 * This is supplied in the board information structure, so we
		 * copy that into the controller.
		 * So, far we have only been given one Ethernet address. We use
		 * the same address for all channels
		 */
#define ea gd->bd->bi_enetaddr
		fpp->fen_paddrh = (ea[5] << 8) + ea[4];
		fpp->fen_paddrm = (ea[3] << 8) + ea[2];
		fpp->fen_paddrl = (ea[1] << 8) + ea[0];
#undef ea

		fpp->fen_minflr = PKT_MINBUF_SIZE; /* min frame len register */
		/*
		 * pad pointer. use tiptr since we don't need
		 * a specific padding char
		 */
		fpp->fen_padptr = fpp->fen_genfcc.fcc_tiptr;
		fpp->fen_maxd1 = PKT_MAXDMA_SIZE;	/* max DMA1 length */
		fpp->fen_maxd2 = PKT_MAXDMA_SIZE;	/* max DMA2 length */
		fpp->fen_rfthr = 1;
		fpp->fen_rfcnt = 1;

		/* 28.9 - (8): clear out events in FCCE */
		fcp->fcc_fcce = ~0x0;

		/* 28.9 - (9): FCCM: mask all events */
		fcp->fcc_fccm = 0;

		/* 28.9 - (10-12): we don't use ethernet interrupts */

		/* 28.9 - (13)
		 *
		 * Let's re-initialize the channel now.  We have to do it later
		 * than the manual describes because we have just now finished
		 * the BD initialization.
		 */
		cp->cp_cpcr = mk_cr_cmd (ecp->page, ecp->sblock, \
			0x0c, CPM_CR_INIT_TRX) | CPM_CR_FLG;
		do {
			__asm__ __volatile__ ("eieio");
		} while (cp->cp_cpcr & CPM_CR_FLG);
	}

	puts (" done\nStarting test... (Ctrl-C to Finish)\n");

	/*
	 * Note: don't want serial output from here until the end of the
	 * test - the delays would probably stuff things up.
	 */

	clear_ctrlc ();
	runtime = get_timer (0);

	do {
		nclosed = 0;

		for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++) {
			volatile fcc_t *fcp = &immr->im_fcc[c];
			elbt_chan *ecp = &elbt_chans[c];
			int i;

			switch (ecp->state) {

			case Idle:
				/*
				 * set the channel Running ...
				 */

				/* 28.9 - (14): enable tx/rx in gfmr */
				fcp->fcc_gfmr |= FCC_GFMR_ENT | FCC_GFMR_ENR;

				ecp->state = Running;
				break;

			case Running:
				/*
				 * (while Running only) check for
				 * termination of the test
				 */

				(void)ctrlc ();

				if (had_ctrlc ()) {
					/*
					 * initiate a "graceful stop transmit"
					 * on the channel
					 */
					cp->cp_cpcr = mk_cr_cmd (ecp->page, \
						ecp->sblock, 0x0c, \
						CPM_CR_GRACEFUL_STOP_TX) | \
						CPM_CR_FLG;
					do {
						__asm__ __volatile__ ("eieio");
					} while (cp->cp_cpcr & CPM_CR_FLG);

					ecp->clstime = get_timer (0);
					ecp->state = Closing;
				}
				/* fall through ... */

			case Closing:
				/*
				 * (while Running or Closing) poll the channel:
				 * - check for any non-READY tx buffers and
				 *   make them ready
				 * - check for any non-EMPTY rx buffers and
				 *   check that they were received correctly,
				 *   adjust counters etc, then make empty
				 */

				for (i = 0; i < ELBT_NTXBD; i++) {
					cbd_t *bdp = &ecp->txbd[i];
					ushort sc = bdp->cbd_sc;

					if ((sc & BD_ENET_TX_READY) != 0)
						continue;

					/*
					 * this frame has finished
					 * transmitting
					 */
					ecp->nsent++;

					if (sc & BD_ENET_TX_STATS) {
						ulong n;

						/*
						 * we had an error on
						 * the transmission
						 */
						n = ecp->ntxerr++;
						if (n < ELBT_MAXTXERR)
							ecp->txerrs[n] = sc;

						if (sc & BD_ENET_TX_DEF)
							ecp->txeacc.def++;
						if (sc & BD_ENET_TX_HB)
							ecp->txeacc.hb++;
						if (sc & BD_ENET_TX_LC)
							ecp->txeacc.lc++;
						if (sc & BD_ENET_TX_RL)
							ecp->txeacc.rl++;
						if (sc & BD_ENET_TX_RCMASK)
							ecp->txeacc.rc++;
						if (sc & BD_ENET_TX_UN)
							ecp->txeacc.un++;
						if (sc & BD_ENET_TX_CSL)
							ecp->txeacc.csl++;

						bdp->cbd_sc &= \
							~BD_ENET_TX_STATS;
					}

					if (ecp->state == Closing)
						ecp->clstime = get_timer (0);

					/* make it ready again */
					bdp->cbd_sc |= BD_ENET_TX_READY;
				}

				for (i = 0; i < ELBT_NRXBD; i++) {
					cbd_t *bdp = &ecp->rxbd[i];
					ushort sc = bdp->cbd_sc, mask;

					if ((sc & BD_ENET_RX_EMPTY) != 0)
						continue;

					/* we have a new frame in this buffer */
					ecp->nrcvd++;

					mask = BD_ENET_RX_LAST|BD_ENET_RX_FIRST;
					if ((sc & mask) != mask) {
						/* somethings wrong here ... */
						if (!(sc & BD_ENET_RX_LAST))
							ecp->rxeacc._l++;
						if (!(sc & BD_ENET_RX_FIRST))
							ecp->rxeacc._f++;
					}

					if (sc & BD_ENET_RX_STATS) {
						ulong n;

						/*
						 * we had some sort of error
						 * on the frame
						 */
						n = ecp->nrxerr++;
						if (n < ELBT_MAXRXERR)
							ecp->rxerrs[n] = sc;

						if (sc & BD_ENET_RX_MISS)
							ecp->rxeacc.m++;
						if (sc & BD_ENET_RX_BC)
							ecp->rxeacc.bc++;
						if (sc & BD_ENET_RX_MC)
							ecp->rxeacc.mc++;
						if (sc & BD_ENET_RX_LG)
							ecp->rxeacc.lg++;
						if (sc & BD_ENET_RX_NO)
							ecp->rxeacc.no++;
						if (sc & BD_ENET_RX_SH)
							ecp->rxeacc.sh++;
						if (sc & BD_ENET_RX_CR)
							ecp->rxeacc.cr++;
						if (sc & BD_ENET_RX_OV)
							ecp->rxeacc.ov++;
						if (sc & BD_ENET_RX_CL)
							ecp->rxeacc.cl++;

						bdp->cbd_sc &= \
							~BD_ENET_RX_STATS;
					}
					else {
						ushort datlen = bdp->cbd_datlen;
						Ethernet_t *ehp;
						ushort prot;
						int ours, tb, n, nbytes;

						ehp = (Ethernet_t *) \
							&ecp->rxbufs[i][0];

						ours = memcmp (ehp->et_src, \
							NetOurEther, 6);

						prot = swap16 (ehp->et_protlen);
						tb = prot & 0x8000;
						n = prot & 0x7fff;

						nbytes = ELBT_BUFSZ - \
							offsetof (Ethernet_t, \
								et_dsap) - \
							ELBT_CRCSZ;

						/* check the frame is correct */
						if (datlen != ELBT_BUFSZ)
							ecp->rxeacc.badlen++;
						else if (!ours)
							ecp->rxeacc.badsrc++;
						else if (!tb || n >= ELBT_NTXBD)
							ecp->rxeacc.badtyp++;
						else {
							ulong patword = \
								patwords[n];
							uint nbb;

							nbb = badbits ( \
								&ehp->et_dsap, \
								nbytes, \
								patword);

							ecp->rxeacc.badbit += \
								nbb;
						}
					}

					if (ecp->state == Closing)
					    ecp->clstime = get_timer (0);

					/* make it empty again */
					bdp->cbd_sc |= BD_ENET_RX_EMPTY;
				}

				if (ecp->state != Closing)
					break;

				/*
				 * (while Closing) check to see if
				 * waited long enough
				 */

				if (get_timer (ecp->clstime) >= ELBT_CLSWAIT) {
					/* write GFMR: disable tx/rx */
					fcp->fcc_gfmr &= \
						~(FCC_GFMR_ENT | FCC_GFMR_ENR);
					ecp->state = Closed;
				}

				break;

			case Closed:
				nclosed++;
				break;
			}
		}

	} while (nclosed < (FCC_END_LOOP - FCC_START_LOOP + 1));

	runtime = get_timer (runtime);
	if (runtime <= ELBT_CLSWAIT) {
		printf ("Whoops! somehow elapsed time (%ld) is wrong (<= %d)\n",
			runtime, ELBT_CLSWAIT);
		return;
	}
	nmsec = runtime - ELBT_CLSWAIT;

	printf ("Test Finished in %ldms (plus %dms close wait period)!\n\n",
		nmsec, ELBT_CLSWAIT);

	/*
	 * now print stats
	 */

	for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++) {
		elbt_chan *ecp = &elbt_chans[c];
		uint rxpps, txpps, nerr;

		rxpps = (ecp->nrcvd * 1000) / nmsec;
		txpps = (ecp->nsent * 1000) / nmsec;

		printf ("Channel %d: %d rcvd (%d pps, %d rxerrs), "
			"%d sent (%d pps, %d txerrs)\n\n", c,
			ecp->nrcvd, rxpps, ecp->nrxerr,
			ecp->nsent, txpps, ecp->ntxerr);

		if ((nerr = ecp->nrxerr) > 0) {
			ulong i;

			printf ("\tFirst %d rx errs:", nerr);
			for (i = 0; i < nerr; i++)
				printf (" %04x", ecp->rxerrs[i]);
			putc ('\n');
		}

		if ((nerr = ecp->ntxerr) > 0) {
			ulong i;

			printf ("\tFirst %d tx errs:", nerr);
			for (i = 0; i < nerr; i++)
				printf (" %04x", ecp->txerrs[i]);
			putc ('\n');
		}
	}

	puts ("Receive Error Counts:\n");
	for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++)
		bases[c] = (uchar *)&elbt_chans[c].rxeacc;
	print_desc (rxeacc_descs, rxeacc_ndesc, bases, 3);

	puts ("\nTransmit Error Counts:\n");
	for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++)
		bases[c] = (uchar *)&elbt_chans[c].txeacc;
	print_desc (txeacc_descs, txeacc_ndesc, bases, 3);

	puts ("\nRMON(-like) Counters:\n");
	for (c = FCC_START_LOOP; c <= FCC_END_LOOP; c++)
		bases[c] = (uchar *)&immr->im_dprambase[elbt_chans[c].proff];
	print_desc (epram_descs, epram_ndesc, bases, 3);
}

#endif /* CONFIG_ETHER_LOOPBACK_TEST */

#endif	/* CONFIG_ETHER_ON_FCC && CFG_CMD_NET && CONFIG_NET_MULTI */