sdram_init.c

Uboot源码,非常通用的bootloader.适用于各种平台的Linux系统引导.

/*
 * (C) Copyright 2001
 * Josh Huber <[e-mail]>, Mission Critical Linux, Inc.
 *
 * 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
 */

/*************************************************************************
 * adaption for the Marvell DB64360 Board
 * Ingo Assmus ([e-mail])
 *
 * adaption for the cpci750 Board
 * Reinhard Arlt ([e-mail])
 *************************************************************************/


/* sdram_init.c - automatic memory sizing */

#include <common.h>
#include <74xx_7xx.h>
#include "../../Marvell/include/memory.h"
#include "../../Marvell/include/pci.h"
#include "../../Marvell/include/mv_gen_reg.h"
#include <net.h>

#include "eth.h"
#include "mpsc.h"
#include "../../Marvell/common/i2c.h"
#include "64360.h"
#include "mv_regs.h"

DECLARE_GLOBAL_DATA_PTR;

#undef	DEBUG
/* #define DEBUG */
#ifdef CONFIG_PCI
#define	MAP_PCI
#endif /* of CONFIG_PCI */

#ifdef DEBUG
#define DP(x) x
#else
#define DP(x)
#endif

int set_dfcdlInit(void);	/* setup delay line of Mv64360 */

/* ------------------------------------------------------------------------- */

int
memory_map_bank(unsigned int bankNo,
		unsigned int bankBase,
		unsigned int bankLength)
{
#ifdef MAP_PCI
	PCI_HOST host;
#endif


#ifdef DEBUG
	if (bankLength > 0) {
		printf("mapping bank %d at %08x - %08x\n",
		       bankNo, bankBase, bankBase + bankLength - 1);
	} else {
		printf("unmapping bank %d\n", bankNo);
	}
#endif

	memoryMapBank(bankNo, bankBase, bankLength);

#ifdef MAP_PCI
	for (host=PCI_HOST0;host<=PCI_HOST1;host++) {
		const int features=
			PREFETCH_ENABLE |
			DELAYED_READ_ENABLE |
			AGGRESSIVE_PREFETCH |
			READ_LINE_AGGRESSIVE_PREFETCH |
			READ_MULTI_AGGRESSIVE_PREFETCH |
			MAX_BURST_4 |
			PCI_NO_SWAP;

		pciMapMemoryBank(host, bankNo, bankBase, bankLength);

		pciSetRegionSnoopMode(host, bankNo, PCI_SNOOP_WB, bankBase,
				bankLength);

		pciSetRegionFeatures(host, bankNo, features, bankBase, bankLength);
	}
#endif
	return 0;
}

#define GB         (1 << 30)

/* much of this code is based on (or is) the code in the pip405 port */
/* thanks go to the authors of said port - Josh */

/* structure to store the relevant information about an sdram bank */
typedef struct sdram_info {
	uchar drb_size;
	uchar registered, ecc;
	uchar tpar;
	uchar tras_clocks;
	uchar burst_len;
	uchar banks, slot;
} sdram_info_t;

/* Typedefs for 'gtAuxilGetDIMMinfo' function */

typedef enum _memoryType {SDRAM, DDR} MEMORY_TYPE;

typedef enum _voltageInterface {TTL_5V_TOLERANT, LVTTL, HSTL_1_5V,
				SSTL_3_3V, SSTL_2_5V, VOLTAGE_UNKNOWN,
			       } VOLTAGE_INTERFACE;

typedef enum _max_CL_supported_DDR {DDR_CL_1=1, DDR_CL_1_5=2, DDR_CL_2=4, DDR_CL_2_5=8, DDR_CL_3=16, DDR_CL_3_5=32, DDR_CL_FAULT} MAX_CL_SUPPORTED_DDR;
typedef enum _max_CL_supported_SD {SD_CL_1=1,  SD_CL_2,  SD_CL_3, SD_CL_4, SD_CL_5, SD_CL_6, SD_CL_7, SD_FAULT} MAX_CL_SUPPORTED_SD;


/* SDRAM/DDR information struct */
typedef struct _gtMemoryDimmInfo
{
    MEMORY_TYPE          memoryType;
    unsigned int         numOfRowAddresses;
    unsigned int         numOfColAddresses;
    unsigned int         numOfModuleBanks;
    unsigned int         dataWidth;
    VOLTAGE_INTERFACE    voltageInterface;
    unsigned int         errorCheckType;                                /* ECC , PARITY..*/
    unsigned int         sdramWidth;                                    /* 4,8,16 or 32 */;
    unsigned int         errorCheckDataWidth;                           /* 0 - no, 1 - Yes */
    unsigned int         minClkDelay;
    unsigned int         burstLengthSupported;
    unsigned int         numOfBanksOnEachDevice;
    unsigned int         suportedCasLatencies;
    unsigned int     	 RefreshInterval;
    unsigned int   	 maxCASlatencySupported_LoP;			/* LoP left of point (measured in ns) */
    unsigned int   	 maxCASlatencySupported_RoP;			/* RoP right of point (measured in ns)*/
    MAX_CL_SUPPORTED_DDR maxClSupported_DDR;
    MAX_CL_SUPPORTED_SD  maxClSupported_SD;
    unsigned int         moduleBankDensity;
    /* module attributes (true for yes) */
    bool                 bufferedAddrAndControlInputs;
    bool                 registeredAddrAndControlInputs;
    bool                 onCardPLL;
    bool                 bufferedDQMBinputs;
    bool                 registeredDQMBinputs;
    bool	         differentialClockInput;
    bool                 redundantRowAddressing;

    /* module general attributes */
    bool                 suportedAutoPreCharge;
    bool                 suportedPreChargeAll;
    bool                 suportedEarlyRasPreCharge;
    bool                 suportedWrite1ReadBurst;
    bool                 suported5PercentLowVCC;
    bool                 suported5PercentUpperVCC;
    /* module timing parameters */
    unsigned int         minRasToCasDelay;
    unsigned int         minRowActiveRowActiveDelay;
    unsigned int         minRasPulseWidth;
    unsigned int         minRowPrechargeTime;   			/* measured in ns */

    int   	         addrAndCommandHoldTime;			/* LoP left of point (measured in ns) */
    int   	         addrAndCommandSetupTime;				/* (measured in ns/100) */
    int   	         dataInputSetupTime;				/* LoP left of point (measured in ns) */
    int   	         dataInputHoldTime;				/* LoP left of point (measured in ns) */
/* tAC times for highest 2nd and 3rd highest CAS Latency values */
    unsigned int   	 clockToDataOut_LoP;				/* LoP left of point (measured in ns) */
    unsigned int   	 clockToDataOut_RoP;				/* RoP right of point (measured in ns)*/
    unsigned int   	 clockToDataOutMinus1_LoP;				/* LoP left of point (measured in ns) */
    unsigned int   	 clockToDataOutMinus1_RoP;			/* RoP right of point (measured in ns)*/
    unsigned int   	 clockToDataOutMinus2_LoP;				/* LoP left of point (measured in ns) */
    unsigned int   	 clockToDataOutMinus2_RoP;			/* RoP right of point (measured in ns)*/

    unsigned int   	 minimumCycleTimeAtMaxCasLatancy_LoP;		/* LoP left of point (measured in ns) */
    unsigned int   	 minimumCycleTimeAtMaxCasLatancy_RoP;		/* RoP right of point (measured in ns)*/

    unsigned int   	 minimumCycleTimeAtMaxCasLatancyMinus1_LoP;	/* LoP left of point (measured in ns) */
    unsigned int   	 minimumCycleTimeAtMaxCasLatancyMinus1_RoP;	/* RoP right of point (measured in ns)*/

    unsigned int   	 minimumCycleTimeAtMaxCasLatancyMinus2_LoP;	/* LoP left of point (measured in ns) */
    unsigned int   	 minimumCycleTimeAtMaxCasLatancyMinus2_RoP;	/* RoP right of point (measured in ns)*/

    /* Parameters calculated from
       the extracted DIMM information */
    unsigned int         size;
    unsigned int         deviceDensity;           		       	/* 16,64,128,256 or 512 Mbit */
    unsigned int         numberOfDevices;
    uchar 		 drb_size;				       	/* DRAM size in n*64Mbit */
    uchar 		 slot;						/* Slot Number this module is inserted in */
    uchar 		 spd_raw_data[128];			       	/* Content of SPD-EEPROM copied 1:1 */
#ifdef DEBUG
    uchar 		 manufactura[8];				/* Content of SPD-EEPROM Byte 64-71 */
    uchar 		 modul_id[18];					/* Content of SPD-EEPROM Byte 73-90 */
    uchar 		 vendor_data[27];			       	/* Content of SPD-EEPROM Byte 99-125 */
    unsigned long	 modul_serial_no;			       	/* Content of SPD-EEPROM Byte 95-98 */
    unsigned int         manufac_date;					/* Content of SPD-EEPROM Byte 93-94 */
    unsigned int         modul_revision;				/* Content of SPD-EEPROM Byte 91-92 */
    uchar 		 manufac_place;					/* Content of SPD-EEPROM Byte 72 */

#endif
} AUX_MEM_DIMM_INFO;


/*
 * translate ns.ns/10 coding of SPD timing values
 * into 10 ps unit values
 */
static inline unsigned short
NS10to10PS(unsigned char spd_byte)
{
	unsigned short ns, ns10;

	/* isolate upper nibble */
	ns = (spd_byte >> 4) & 0x0F;
	/* isolate lower nibble */
	ns10 = (spd_byte & 0x0F);

	return(ns*100 + ns10*10);
}

/*
 * translate ns coding of SPD timing values
 * into 10 ps unit values
 */
static inline unsigned short
NSto10PS(unsigned char spd_byte)
{
	return(spd_byte*100);
}

/* This code reads the SPD chip on the sdram and populates
 * the array which is passed in with the relevant information */
/* static int check_dimm(uchar slot, AUX_MEM_DIMM_INFO *info) */
static int check_dimm (uchar slot, AUX_MEM_DIMM_INFO * dimmInfo)
{
	unsigned long spd_checksum;

	uchar addr = slot == 0 ? DIMM0_I2C_ADDR : DIMM1_I2C_ADDR;
	int ret;
	unsigned int i, j, density = 1, devicesForErrCheck = 0;

#ifdef DEBUG
	unsigned int k;
#endif
	unsigned int rightOfPoint = 0, leftOfPoint = 0, mult, div, time_tmp;
	int sign = 1, shift, maskLeftOfPoint, maskRightOfPoint;
	uchar supp_cal, cal_val;
	ulong memclk, tmemclk;
	ulong tmp;
	uchar trp_clocks = 0, trcd_clocks, tras_clocks, trrd_clocks;
	uchar data[128];

	memclk = gd->bus_clk;
	tmemclk = 1000000000 / (memclk / 100);	/* in 10 ps units */

	memset (data, 0, sizeof (data));


	ret = 0;

	DP (puts ("before i2c read\n"));

	ret = i2c_read (addr, 0, 2, data, 128);

	DP (puts ("after i2c read\n"));

	if ((data[64] != 'e') || (data[65] != 's') || (data[66] != 'd')
	    || (data[67] != '-') || (data[68] != 'g') || (data[69] != 'm')
	    || (data[70] != 'b') || (data[71] != 'h')) {
		ret = -1;
	}

	if ((ret != 0) && (slot == 0)) {
		memset (data, 0, sizeof (data));
		data[0] = 0x80;
		data[1] = 0x08;
		data[2] = 0x07;
		data[3] = 0x0c;
		data[4] = 0x09;
		data[5] = 0x01;
		data[6] = 0x48;
		data[7] = 0x00;
		data[8] = 0x04;
		data[9] = 0x75;
		data[10] = 0x80;
		data[11] = 0x02;
		data[12] = 0x80;
		data[13] = 0x10;
		data[14] = 0x08;
		data[15] = 0x01;
		data[16] = 0x0e;
		data[17] = 0x04;
		data[18] = 0x0c;
		data[19] = 0x01;
		data[20] = 0x02;
		data[21] = 0x20;
		data[22] = 0x00;
		data[23] = 0xa0;
		data[24] = 0x80;
		data[25] = 0x00;
		data[26] = 0x00;
		data[27] = 0x50;
		data[28] = 0x3c;
		data[29] = 0x50;
		data[30] = 0x32;
		data[31] = 0x10;
		data[32] = 0xb0;
		data[33] = 0xb0;
		data[34] = 0x60;
		data[35] = 0x60;
		data[64] = 'e';
		data[65] = 's';
		data[66] = 'd';
		data[67] = '-';
		data[68] = 'g';
		data[69] = 'm';
		data[70] = 'b';
		data[71] = 'h';
		ret = 0;
	}

	/* zero all the values */
	memset (dimmInfo, 0, sizeof (*dimmInfo));

	/* copy the SPD content 1:1 into the dimmInfo structure */
	for (i = 0; i <= 127; i++) {
		dimmInfo->spd_raw_data[i] = data[i];
	}

	if (ret) {
		DP (printf ("No DIMM in slot %d [err = %x]\n", slot, ret));
		return 0;
	} else
		dimmInfo->slot = slot;	/* start to fill up dimminfo for this "slot" */

#ifdef CFG_DISPLAY_DIMM_SPD_CONTENT

	for (i = 0; i <= 127; i++) {
		printf ("SPD-EEPROM Byte %3d = %3x (%3d)\n", i, data[i],
			data[i]);
	}

#endif
#ifdef DEBUG
	/* find Manufacturer of Dimm Module */
	for (i = 0; i < sizeof (dimmInfo->manufactura); i++) {
		dimmInfo->manufactura[i] = data[64 + i];
	}
	printf ("\nThis RAM-Module is produced by: 		%s\n",
		dimmInfo->manufactura);

	/* find Manul-ID of Dimm Module */
	for (i = 0; i < sizeof (dimmInfo->modul_id); i++) {
		dimmInfo->modul_id[i] = data[73 + i];
	}
	printf ("The Module-ID of this RAM-Module is: 		%s\n",
		dimmInfo->modul_id);

	/* find Vendor-Data of Dimm Module */
	for (i = 0; i < sizeof (dimmInfo->vendor_data); i++) {
		dimmInfo->vendor_data[i] = data[99 + i];
	}
	printf ("Vendor Data of this RAM-Module is: 		%s\n",
		dimmInfo->vendor_data);

	/* find modul_serial_no of Dimm Module */
	dimmInfo->modul_serial_no = (*((unsigned long *) (&data[95])));
	printf ("Serial No. of this RAM-Module is: 		%ld (%lx)\n",
		dimmInfo->modul_serial_no, dimmInfo->modul_serial_no);

	/* find Manufac-Data of Dimm Module */
	dimmInfo->manufac_date = (*((unsigned int *) (&data[93])));
	printf ("Manufactoring Date of this RAM-Module is: 	%d.%d\n", data[93], data[94]);	/*dimmInfo->manufac_date */

	/* find modul_revision of Dimm Module */
	dimmInfo->modul_revision = (*((unsigned int *) (&data[91])));
	printf ("Module Revision of this RAM-Module is: 		%d.%d\n", data[91], data[92]);	/* dimmInfo->modul_revision */

	/* find manufac_place of Dimm Module */
	dimmInfo->manufac_place = (*((unsigned char *) (&data[72])));
	printf ("manufac_place of this RAM-Module is: 		%d\n",
		dimmInfo->manufac_place);

#endif
/*------------------------------------------------------------------------------------------------------------------------------*/
/* calculate SPD checksum */
/*------------------------------------------------------------------------------------------------------------------------------*/
	spd_checksum = 0;
#if 0				/* test-only */
	for (i = 0; i <= 62; i++) {
		spd_checksum += data[i];
	}

	if ((spd_checksum & 0xff) != data[63]) {
		printf ("### Error in SPD Checksum !!! Is_value: %2x should value %2x\n", (unsigned int) (spd_checksum & 0xff), data[63]);
		hang ();
	}

	else
		printf ("SPD Checksum ok!\n");
#endif /* test-only */

/*------------------------------------------------------------------------------------------------------------------------------*/