board/mpc8260ads/mpc8260ads.c

/*
 * (C) Copyright 2001-2003
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * Modified during 2001 by
 * Advanced Communications Technologies (Australia) Pty. Ltd.
 * Howard Walker, Tuong Vu-Dinh
 *
 * (C) Copyright 2001, Stuart Hughes, Lineo Inc, stuarth@lineo.com
 * Added support for the 16M dram simm on the 8260ads boards
 *
 * (C) Copyright 2003 Arabella Software Ltd.
 * Yuli Barcohen <yuli@arabellasw.com>
 * Added support for SDRAM DIMMs SPD EEPROM, MII, Ethernet PHY init.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <common.h>
#include <ioports.h>
#include <mpc8260.h>
#include <i2c.h>
#include <spd.h>
#include <miiphy.h>

/*
 * I/O Port configuration table
 *
 * if conf is 1, then that port pin will be configured at boot time
 * according to the five values podr/pdir/ppar/psor/pdat for that entry
 */

const iop_conf_t iop_conf_tab[4][32] = {

    /* Port A configuration */
    {	/*	      conf ppar psor pdir podr pdat */
	/* PA31 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 TxENB */
	/* PA30 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 TxClav   */
	/* PA29 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 TxSOC  */
	/* PA28 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 RxENB */
	/* PA27 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 RxSOC */
	/* PA26 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 RxClav */
	/* PA25 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[0] */
	/* PA24 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[1] */
	/* PA23 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[2] */
	/* PA22 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[3] */
	/* PA21 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[4] */
	/* PA20 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[5] */
	/* PA19 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[6] */
	/* PA18 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXD[7] */
	/* PA17 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[7] */
	/* PA16 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[6] */
	/* PA15 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[5] */
	/* PA14 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[4] */
	/* PA13 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[3] */
	/* PA12 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[2] */
	/* PA11 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[1] */
	/* PA10 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXD[0] */
	/* PA9  */ {   0,   1,   1,   1,   0,   0   }, /* FCC1 L1TXD */
	/* PA8  */ {   0,   1,   1,   0,   0,   0   }, /* FCC1 L1RXD */
	/* PA7  */ {   0,   0,   0,   1,   0,   0   }, /* PA7 */
	/* PA6  */ {   1,   1,   1,   1,   0,   0   }, /* TDM A1 L1RSYNC */
	/* PA5  */ {   0,   0,   0,   1,   0,   0   }, /* PA5 */
	/* PA4  */ {   0,   0,   0,   1,   0,   0   }, /* PA4 */
	/* PA3  */ {   0,   0,   0,   1,   0,   0   }, /* PA3 */
	/* PA2  */ {   0,   0,   0,   1,   0,   0   }, /* PA2 */
	/* PA1  */ {   1,   0,   0,   0,   0,   0   }, /* FREERUN */
	/* PA0  */ {   0,   0,   0,   1,   0,   0   }  /* PA0 */
    },

    /* Port B configuration */
    {   /*	      conf ppar psor pdir podr pdat */
	/* PB31 */ {   1,   1,   0,   1,   0,   0   }, /* FCC2 MII TX_ER */
	/* PB30 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RX_DV */
	/* PB29 */ {   1,   1,   1,   1,   0,   0   }, /* FCC2 MII TX_EN */
	/* PB28 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RX_ER */
	/* PB27 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII COL */
	/* PB26 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII CRS */
	/* PB25 */ {   1,   1,   0,   1,   0,   0   }, /* FCC2 MII TxD[3] */
	/* PB24 */ {   1,   1,   0,   1,   0,   0   }, /* FCC2 MII TxD[2] */
	/* PB23 */ {   1,   1,   0,   1,   0,   0   }, /* FCC2 MII TxD[1] */
	/* PB22 */ {   1,   1,   0,   1,   0,   0   }, /* FCC2 MII TxD[0] */
	/* PB21 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RxD[0] */
	/* PB20 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RxD[1] */
	/* PB19 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RxD[2] */
	/* PB18 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII RxD[3] */
	/* PB17 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RX_DIV */
	/* PB16 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RX_ERR */
	/* PB15 */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TX_ERR */
	/* PB14 */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TX_EN */
	/* PB13 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:COL */
	/* PB12 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:CRS */
	/* PB11 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RXD */
	/* PB10 */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RXD */
	/* PB9  */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RXD */
	/* PB8  */ {   0,   1,   0,   0,   0,   0   }, /* FCC3:RXD */
	/* PB7  */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TXD */
	/* PB6  */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TXD */
	/* PB5  */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TXD */
	/* PB4  */ {   0,   1,   0,   1,   0,   0   }, /* FCC3:TXD */
	/* PB3  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PB2  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PB1  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PB0  */ {   0,   0,   0,   0,   0,   0   }  /* pin doesn't exist */
    },

    /* Port C */
    {   /*	      conf ppar psor pdir podr pdat */
	/* PC31 */ {   0,   0,   0,   1,   0,   0   }, /* PC31 */
	/* PC30 */ {   0,   0,   0,   1,   0,   0   }, /* PC30 */
	/* PC29 */ {   0,   1,   1,   0,   0,   0   }, /* SCC1 EN *CLSN */
	/* PC28 */ {   0,   0,   0,   1,   0,   0   }, /* PC28 */
	/* PC27 */ {   0,   0,   0,   1,   0,   0   }, /* UART Clock in */
	/* PC26 */ {   0,   0,   0,   1,   0,   0   }, /* PC26 */
	/* PC25 */ {   0,   0,   0,   1,   0,   0   }, /* PC25 */
	/* PC24 */ {   0,   0,   0,   1,   0,   0   }, /* PC24 */
	/* PC23 */ {   0,   1,   0,   1,   0,   0   }, /* ATMTFCLK */
	/* PC22 */ {   0,   1,   0,   0,   0,   0   }, /* ATMRFCLK */
	/* PC21 */ {   0,   1,   0,   0,   0,   0   }, /* SCC1 EN RXCLK */
	/* PC20 */ {   0,   1,   0,   0,   0,   0   }, /* SCC1 EN TXCLK */
	/* PC19 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII Rx Clock (CLK13) */
	/* PC18 */ {   1,   1,   0,   0,   0,   0   }, /* FCC2 MII Tx Clock (CLK14) */
	/* PC17 */ {   0,   0,   0,   1,   0,   0   }, /* PC17 */
	/* PC16 */ {   0,   1,   0,   0,   0,   0   }, /* FCC Tx Clock (CLK16) */
	/* PC15 */ {   0,   0,   0,   1,   0,   0   }, /* PC15 */
	/* PC14 */ {   0,   1,   0,   0,   0,   0   }, /* SCC1 EN *CD */
	/* PC13 */ {   0,   0,   0,   1,   0,   0   }, /* PC13 */
	/* PC12 */ {   0,   1,   0,   1,   0,   0   }, /* PC12 */
	/* PC11 */ {   0,   0,   0,   1,   0,   0   }, /* LXT971 transmit control */
	/* PC10 */ {   1,   0,   0,   1,   0,   0   }, /* LXT970 FETHMDC */
	/* PC9  */ {   1,   0,   0,   0,   0,   0   }, /* LXT970 FETHMDIO */
	/* PC8  */ {   0,   0,   0,   1,   0,   0   }, /* PC8 */
	/* PC7  */ {   0,   0,   0,   1,   0,   0   }, /* PC7 */
	/* PC6  */ {   0,   0,   0,   1,   0,   0   }, /* PC6 */
	/* PC5  */ {   0,   0,   0,   1,   0,   0   }, /* PC5 */
	/* PC4  */ {   0,   0,   0,   1,   0,   0   }, /* PC4 */
	/* PC3  */ {   0,   0,   0,   1,   0,   0   }, /* PC3 */
	/* PC2  */ {   0,   0,   0,   1,   0,   1   }, /* ENET FDE */
	/* PC1  */ {   0,   0,   0,   1,   0,   0   }, /* ENET DSQE */
	/* PC0  */ {   0,   0,   0,   1,   0,   0   }, /* ENET LBK */
    },

    /* Port D */
    {   /*	      conf ppar psor pdir podr pdat */
	/* PD31 */ {   1,   1,   0,   0,   0,   0   }, /* SCC1 UART RxD */
	/* PD30 */ {   1,   1,   1,   1,   0,   0   }, /* SCC1 UART TxD */
	/* PD29 */ {   0,   1,   0,   1,   0,   0   }, /* SCC1 EN TENA */
	/* PD28 */ {   0,   1,   0,   0,   0,   0   }, /* PD28 */
	/* PD27 */ {   0,   1,   1,   1,   0,   0   }, /* PD27 */
	/* PD26 */ {   0,   0,   0,   1,   0,   0   }, /* PD26 */
	/* PD25 */ {   0,   0,   0,   1,   0,   0   }, /* PD25 */
	/* PD24 */ {   0,   0,   0,   1,   0,   0   }, /* PD24 */
	/* PD23 */ {   0,   0,   0,   1,   0,   0   }, /* PD23 */
	/* PD22 */ {   0,   0,   0,   1,   0,   0   }, /* PD22 */
	/* PD21 */ {   0,   0,   0,   1,   0,   0   }, /* PD21 */
	/* PD20 */ {   0,   0,   0,   1,   0,   0   }, /* PD20 */
	/* PD19 */ {   0,   0,   0,   1,   0,   0   }, /* PD19 */
	/* PD18 */ {   0,   0,   0,   1,   0,   0   }, /* PD18 */
	/* PD17 */ {   0,   1,   0,   0,   0,   0   }, /* FCC1 ATMRXPRTY */
	/* PD16 */ {   0,   1,   0,   1,   0,   0   }, /* FCC1 ATMTXPRTY */
	/* PD15 */ {   1,   1,   1,   0,   1,   0   }, /* I2C SDA */
	/* PD14 */ {   1,   1,   1,   0,   1,   0   }, /* I2C SCL */
	/* PD13 */ {   0,   0,   0,   0,   0,   0   }, /* PD13 */
	/* PD12 */ {   0,   0,   0,   0,   0,   0   }, /* PD12 */
	/* PD11 */ {   0,   0,   0,   0,   0,   0   }, /* PD11 */
	/* PD10 */ {   0,   0,   0,   0,   0,   0   }, /* PD10 */
	/* PD9  */ {   0,   1,   0,   1,   0,   0   }, /* SMC1 TXD */
	/* PD8  */ {   0,   1,   0,   0,   0,   0   }, /* SMC1 RXD */
	/* PD7  */ {   0,   0,   0,   1,   0,   1   }, /* PD7 */
	/* PD6  */ {   0,   0,   0,   1,   0,   1   }, /* PD6 */
	/* PD5  */ {   0,   0,   0,   1,   0,   1   }, /* PD5 */
	/* PD4  */ {   0,   0,   0,   1,   0,   1   }, /* PD4 */
	/* PD3  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PD2  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PD1  */ {   0,   0,   0,   0,   0,   0   }, /* pin doesn't exist */
	/* PD0  */ {   0,   0,   0,   0,   0,   0   }  /* pin doesn't exist */
    }
};

void reset_phy (void)
{
	vu_long *bcsr = (vu_long *)CFG_BCSR;

	/* reset the FEC port */
	bcsr[1] &= ~FETH1_RST;
	udelay(2);
	bcsr[1] |=  FETH1_RST;
	udelay(1000);
#ifdef CONFIG_MII
#if CONFIG_ADSTYPE == CFG_PQ2FADS
	/*
	 * Do not bypass Rx/Tx (de)scrambler (fix configuration error)
	 * Enable autonegotiation.
	 */
	miiphy_write(0, 16, 0x610);
	miiphy_write(0, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
#else
	/*
	 * Ethernet PHY is configured (by means of configuration pins)
	 * to work at 10Mb/s only. We reconfigure it using MII
	 * to advertise all capabilities, including 100Mb/s, and
	 * restart autonegotiation.
	 */
	miiphy_write(0, PHY_ANAR, 0x01E1); /* Advertise all capabilities */
	miiphy_write(0, PHY_DCR,  0x0000); /* Do not bypass Rx/Tx (de)scrambler */
	miiphy_write(0, PHY_BMCR, PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
#endif /* CONFIG_ADSTYPE == CFG_PQ2FADS */
#endif /* CONFIG_MII */
}

int board_pre_init (void)
{
	vu_long *bcsr = (vu_long *)CFG_BCSR;

	bcsr[1] = ~FETHIEN1 & ~RS232EN_1;

	return 0;
}

#define ns2clk(ns) (ns / (1000000000 / CONFIG_8260_CLKIN) + 1)

long int initdram (int board_type)
{
	volatile immap_t *immap = (immap_t *) CFG_IMMR;
	volatile memctl8260_t *memctl = &immap->im_memctl;
	volatile uchar *ramaddr, c = 0xff;
	long int msize;
	uint or;
	uint psdmr;
	uint psrt;

	int i;

#ifndef CFG_RAMBOOT
	immap->im_siu_conf.sc_ppc_acr  = 0x00000002;
	immap->im_siu_conf.sc_ppc_alrh = 0x01267893;
	immap->im_siu_conf.sc_tescr1   = 0x00004000;

	memctl->memc_mptpr = CFG_MPTPR;
#ifdef CFG_LSDRAM_BASE
	/* Init local bus SDRAM */
	memctl->memc_lsrt  = CFG_LSRT;
#if CONFIG_ADSTYPE == CFG_PQ2FADS /* CS3 */
	memctl->memc_or3   = 0xFF803280;
	memctl->memc_br3   = CFG_LSDRAM_BASE | 0x00001861;
#else  				  /* CS4 */
	memctl->memc_or4   = 0xFFC01480;
	memctl->memc_br4   = CFG_LSDRAM_BASE | 0x00001861;
#endif /* CONFIG_ADSTYPE == CFG_PQ2FADS */
	memctl->memc_lsdmr = CFG_LSDMR | 0x28000000;
	ramaddr = (uchar *) CFG_LSDRAM_BASE;
	*ramaddr = c;
	memctl->memc_lsdmr = CFG_LSDMR | 0x08000000;
	for (i = 0; i < 8; i++) {
		*ramaddr = c;
	}
	memctl->memc_lsdmr = CFG_LSDMR | 0x18000000;
	*ramaddr = c;
	memctl->memc_lsdmr = CFG_LSDMR | 0x40000000;
#endif /* CFG_LSDRAM_BASE */

	/* Init 60x bus SDRAM */
#ifdef CONFIG_SPD_EEPROM
	{
		spd_eeprom_t spd;
		uint pbi, bsel, rowst, lsb, tmp;

		i2c_read (CONFIG_SPD_ADDR, 0, 1, (uchar *) & spd, sizeof (spd));

		/* Bank-based interleaving is not supported for physical bank
		   sizes greater than 128MB which is encoded as 0x20 in SPD
		 */
		pbi = (spd.row_dens > 32) ? 1 : CONFIG_SDRAM_PBI;
		msize = spd.nrows * (4 * spd.row_dens);	/* Mixed size not supported */
		or = ~(msize - 1) << 20;	/* SDAM */
		switch (spd.nbanks) {	/* BPD */
		case 2:
			bsel = 1;
			break;
		case 4:
			bsel = 2;
			or |= 0x00002000;
			break;
		case 8:
			bsel = 3;
			or |= 0x00004000;
			break;
		}
		lsb = 3;	/* For 64-bit port, lsb is 3 bits */

		if (pbi) {	/* Bus partition depends on interleaving */
			rowst = 32 - (spd.nrow_addr + spd.ncol_addr + bsel + lsb);
			or |= (rowst << 9);	/* ROWST */
		} else {
			rowst = 32 - (spd.nrow_addr + spd.ncol_addr + lsb);
			or |= ((rowst * 2 - 12) << 9);	/* ROWST */
		}
		or |= ((spd.nrow_addr - 9) << 6);	/* NUMR */

		psdmr = (pbi << 31);	/* PBI */
		/* Bus multiplexing parameters */
		tmp = 32 - (lsb + spd.nrow_addr);	/* Tables 10-19 and 10-20 */
		psdmr |= ((tmp - (rowst - 5) - 13) << 24);	/* SDAM */
		psdmr |= ((tmp - 3 - 12) << 21);	/* BSMA */

		tmp = (31 - lsb - 10) - tmp;
		/* Pin connected to SDA10 is (31 - lsb - 10).
		   rowst is multiplexed over (32 - (lsb + spd.nrow_addr)),
		   so (rowst + tmp) alternates with AP.
		 */
		if (pbi)				/* Table 10-7 */
			psdmr |= ((10 - (rowst + tmp)) << 18);	/* SDA10 */
		else
			psdmr |= ((12 - (rowst + tmp)) << 18);	/* SDA10 */

		/* SDRAM device-specific parameters */
		tmp = ns2clk (70);	/* Refresh recovery is not in SPD, so assume 70ns */
		switch (tmp) {		/* RFRC */
		case 1:
		case 2:
			psdmr |= (1 << 15);
			break;
		case 3:
		case 4:
		case 5:
		case 6:
		case 7:
		case 8:
			psdmr |= ((tmp - 2) << 15);
			break;
		default:
			psdmr |= (7 << 15);
		}
		psdmr |= (ns2clk (spd.trp) % 8 << 12);	/* PRETOACT */
		psdmr |= (ns2clk (spd.trcd) % 8 << 9);	/* ACTTORW */
		/* BL=0 because for 64-bit SDRAM burst length must be 4 */
		/* LDOTOPRE ??? */
		for (i = 0, tmp = spd.write_lat; (i < 4) && ((tmp & 1) == 0); i++)
			tmp >>= 1;
		switch (i) {			/* WRC */
		case 0:
		case 1:
			psdmr |= (1 << 4);
			break;
		case 2:
		case 3:
			psdmr |= (i << 4);
			break;
		}
		/* EAMUX=0 - no external address multiplexing */
		/* BUFCMD=0 - no external buffers */
		for (i = 1, tmp = spd.cas_lat; (i < 3) && ((tmp & 1) == 0); i++)
			tmp >>= 1;
		psdmr |= i;				/* CL */

		switch (spd.refresh & 0x7F) {
		case 1:
			tmp = 3900;
			break;
		case 2:
			tmp = 7800;
			break;
		case 3:
			tmp = 31300;
			break;
		case 4:
			tmp = 62500;
			break;
		case 5:
			tmp = 125000;
			break;
		default:
			tmp = 15625;
		}
		psrt = tmp / (1000000000 / CONFIG_8260_CLKIN *
				  ((memctl->memc_mptpr >> 8) + 1)) - 1;
#ifdef SPD_DEBUG
		printf ("\nDIMM type:       %-18.18s\n", spd.mpart);
		printf ("SPD size:        %d\n", spd.info_size);
		printf ("EEPROM size:     %d\n", 1 << spd.chip_size);
		printf ("Memory type:     %d\n", spd.mem_type);
		printf ("Row addr:        %d\n", spd.nrow_addr);
		printf ("Column addr:     %d\n", spd.ncol_addr);
		printf ("# of rows:       %d\n", spd.nrows);
		printf ("Row density:     %d\n", spd.row_dens);
		printf ("# of banks:      %d\n", spd.nbanks);
		printf ("Data width:      %d\n",
				256 * spd.dataw_msb + spd.dataw_lsb);
		printf ("Chip width:      %d\n", spd.primw);
		printf ("Refresh rate:    %02X\n", spd.refresh);
		printf ("CAS latencies:   %02X\n", spd.cas_lat);
		printf ("Write latencies: %02X\n", spd.write_lat);
		printf ("tRP:             %d\n", spd.trp);
		printf ("tRCD:            %d\n", spd.trcd);

		printf ("OR=%X, PSDMR=%08X, PSRT=%0X\n", or, psdmr, psrt);
#endif /* SPD_DEBUG */
	}
#else  /* !CONFIG_SPD_EEPROM */
#if CONFIG_ADSTYPE == CFG_PQ2FADS
	msize = 32;
	or = 0xFE002EC0;
#else
	msize = 16;
	or = 0xFF000CA0;
#endif /* CONFIG_ADSTYPE == CFG_PQ2FADS */
	psdmr = CFG_PSDMR;
	psrt  = CFG_PSRT;
#endif /* CONFIG_SPD_EEPROM */
	memctl->memc_psrt = psrt;
	memctl->memc_or2 = or;
	memctl->memc_br2 = CFG_SDRAM_BASE | 0x00000041;
	ramaddr = (uchar *) CFG_SDRAM_BASE;
	memctl->memc_psdmr = psdmr | 0x28000000;	/* Precharge all banks */
	*ramaddr = c;
	memctl->memc_psdmr = psdmr | 0x08000000;	/* CBR refresh */
	for (i = 0; i < 8; i++)
		*ramaddr = c;

	memctl->memc_psdmr = psdmr | 0x18000000;	/* Mode Register write */
	*ramaddr = c;
	memctl->memc_psdmr = psdmr | 0x40000000;	/* Refresh enable */
	*ramaddr = c;
#endif

	/* return total 60x bus SDRAM size */
	return (msize * 1024 * 1024);
}

int checkboard (void)
{
#if   CONFIG_ADSTYPE == CFG_8260ADS
	puts ("Board: Motorola MPC8260ADS\n");
#elif CONFIG_ADSTYPE == CFG_8266ADS
	puts ("Board: Motorola MPC8266ADS\n");
#elif CONFIG_ADSTYPE == CFG_PQ2FADS
	puts ("Board: Motorola PQ2FADS-ZU\n");
#else
	puts ("Board: unknown\n");
#endif
	return 0;
}