flash.c

AT91RM9200的完整启动代码：包括loader, boot及U-boot三部分均已编译通过！欢迎下载使用！

/*
 * (C) Copyright 2001
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * 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 <ppc4xx.h>
#include <asm/processor.h>

flash_info_t	flash_info[CFG_MAX_FLASH_BANKS]; /* info for FLASH chips	*/


#ifdef CFG_FLASH_16BIT
#define FLASH_WORD_SIZE	unsigned short
#define	FLASH_ID_MASK	0xFFFF
#else
#define FLASH_WORD_SIZE unsigned long
#define	FLASH_ID_MASK	0xFFFFFFFF
#endif

/*-----------------------------------------------------------------------
 * Functions
 */
/* stolen from esteem192e/flash.c */
ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info);

#ifndef CFG_FLASH_16BIT
static int write_word (flash_info_t *info, ulong dest, ulong data);
#else
static int write_short (flash_info_t *info, ulong dest, ushort data);
#endif
static void flash_get_offsets (ulong base, flash_info_t *info);


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

unsigned long flash_init (void)
{
	unsigned long size_b0, size_b1;
	int i;
        uint pbcr;
        unsigned long base_b0, base_b1;

	/* Init: no FLASHes known */
	for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
		flash_info[i].flash_id = FLASH_UNKNOWN;
	}

	/* Static FLASH Bank configuration here - FIXME XXX */

	size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE0_PRELIM, &flash_info[0]);

	if (flash_info[0].flash_id == FLASH_UNKNOWN) {
		printf ("## Unknown FLASH on Bank 0 - Size = 0x%08lx = %ld MB\n",
			size_b0, size_b0<<20);
	}

	/* Only one bank */
	if (CFG_MAX_FLASH_BANKS == 1)
	  {
	    /* Setup offsets */
	    flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);

	    /* Monitor protection ON by default */
#if 0	    /* sand: */
	    (void)flash_protect(FLAG_PROTECT_SET,
				FLASH_BASE0_PRELIM-monitor_flash_len+size_b0,
				FLASH_BASE0_PRELIM-1+size_b0,
				&flash_info[0]);
#else
	    (void)flash_protect(FLAG_PROTECT_SET,
		      		CFG_MONITOR_BASE,
		      		CFG_MONITOR_BASE+monitor_flash_len-1,
		      		&flash_info[0]);
#endif
	    size_b1 = 0 ;
	    flash_info[0].size = size_b0;
	  }

	/* 2 banks */
	else
	  {
	    size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)FLASH_BASE1_PRELIM, &flash_info[1]);

	    /* Re-do sizing to get full correct info */

	    if (size_b1)
	      {
		mtdcr(ebccfga, pb0cr);
		pbcr = mfdcr(ebccfgd);
		mtdcr(ebccfga, pb0cr);
		base_b1 = -size_b1;
		pbcr = (pbcr & 0x0001ffff) | base_b1 | (((size_b1/1024/1024)-1)<<17);
		mtdcr(ebccfgd, pbcr);
		/*          printf("pb1cr = %x\n", pbcr); */
	      }

	    if (size_b0)
	      {
		mtdcr(ebccfga, pb1cr);
		pbcr = mfdcr(ebccfgd);
		mtdcr(ebccfga, pb1cr);
		base_b0 = base_b1 - size_b0;
		pbcr = (pbcr & 0x0001ffff) | base_b0 | (((size_b0/1024/1024)-1)<<17);
		mtdcr(ebccfgd, pbcr);
		/*            printf("pb0cr = %x\n", pbcr); */
	      }

	    size_b0 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b0, &flash_info[0]);

	    flash_get_offsets (base_b0, &flash_info[0]);

	    /* monitor protection ON by default */
#if 0	    /* sand: */
	    (void)flash_protect(FLAG_PROTECT_SET,
				FLASH_BASE0_PRELIM-monitor_flash_len+size_b0,
				FLASH_BASE0_PRELIM-1+size_b0,
				&flash_info[0]);
#else
	    (void)flash_protect(FLAG_PROTECT_SET,
		      		CFG_MONITOR_BASE,
		      		CFG_MONITOR_BASE+monitor_flash_len-1,
		      		&flash_info[0]);
#endif

	    if (size_b1) {
	      /* Re-do sizing to get full correct info */
	      size_b1 = flash_get_size((volatile FLASH_WORD_SIZE *)base_b1, &flash_info[1]);

	      flash_get_offsets (base_b1, &flash_info[1]);

	      /* monitor protection ON by default */
	      (void)flash_protect(FLAG_PROTECT_SET,
				  base_b1+size_b1-monitor_flash_len,
				  base_b1+size_b1-1,
				  &flash_info[1]);
	      /* monitor protection OFF by default (one is enough) */
	      (void)flash_protect(FLAG_PROTECT_CLEAR,
				  base_b0+size_b0-monitor_flash_len,
				  base_b0+size_b0-1,
				  &flash_info[0]);
	    } else {
	      flash_info[1].flash_id = FLASH_UNKNOWN;
	      flash_info[1].sector_count = -1;
	    }

	    flash_info[0].size = size_b0;
	    flash_info[1].size = size_b1;
	  }/* else 2 banks */
	return (size_b0 + size_b1);
}



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

static void flash_get_offsets (ulong base, flash_info_t *info)
{
	int i;

	/* set up sector start adress table */
	if ((info->flash_id & FLASH_TYPEMASK) == FLASH_28F320J3A ||
	    (info->flash_id & FLASH_TYPEMASK) == FLASH_28F640J3A ||
	    (info->flash_id & FLASH_TYPEMASK) == FLASH_28F128J3A) {
	    for (i = 0; i < info->sector_count; i++) {
		info->start[i] = base + (i * info->size/info->sector_count);
	    }
	} else if (info->flash_id & FLASH_BTYPE) {
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CFG_FLASH_16BIT
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00004000;
		info->start[2] = base + 0x00008000;
		info->start[3] = base + 0x0000C000;
		info->start[4] = base + 0x00010000;
		info->start[5] = base + 0x00014000;
		info->start[6] = base + 0x00018000;
		info->start[7] = base + 0x0001C000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x000E0000;
	        }
               }
             else {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00008000;
		info->start[2] = base + 0x0000C000;
		info->start[3] = base + 0x00010000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00020000) - 0x00060000;
		}
	       }
#else
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00002000;
		info->start[2] = base + 0x00004000;
		info->start[3] = base + 0x00006000;
		info->start[4] = base + 0x00008000;
		info->start[5] = base + 0x0000A000;
		info->start[6] = base + 0x0000C000;
		info->start[7] = base + 0x0000E000;
		for (i = 8; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00010000) - 0x00070000;
	        }
	       }
             else {
		/* set sector offsets for bottom boot block type	*/
		info->start[0] = base + 0x00000000;
		info->start[1] = base + 0x00004000;
		info->start[2] = base + 0x00006000;
		info->start[3] = base + 0x00008000;
		for (i = 4; i < info->sector_count; i++) {
			info->start[i] = base + (i * 0x00010000) - 0x00030000;
		}
	       }
#endif
	} else {
		/* set sector offsets for top boot block type		*/
		i = info->sector_count - 1;
             if ((info->flash_id & FLASH_VENDMASK) == FLASH_MAN_INTEL) {

#ifndef CFG_FLASH_16BIT
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		info->start[i--] = base + info->size - 0x00014000;
		info->start[i--] = base + info->size - 0x00018000;
		info->start[i--] = base + info->size - 0x0001C000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}

               } else {

		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x00010000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00020000;
		}
	       }
#else
		info->start[i--] = base + info->size - 0x00002000;
		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00006000;
		info->start[i--] = base + info->size - 0x00008000;
		info->start[i--] = base + info->size - 0x0000A000;
		info->start[i--] = base + info->size - 0x0000C000;
		info->start[i--] = base + info->size - 0x0000E000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00010000;
		}

               } else {

		info->start[i--] = base + info->size - 0x00004000;
		info->start[i--] = base + info->size - 0x00006000;
		info->start[i--] = base + info->size - 0x00008000;
		for (; i >= 0; i--) {
			info->start[i] = base + i * 0x00010000;
		}
	       }
#endif
	}


}

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

void flash_print_info  (flash_info_t *info)
{
	int i;
	uchar *boottype;
	uchar botboot[]=", bottom boot sect)\n";
	uchar topboot[]=", top boot sector)\n";

	if (info->flash_id == FLASH_UNKNOWN) {
		printf ("missing or unknown FLASH type\n");
		return;
	}

	switch (info->flash_id & FLASH_VENDMASK) {
	case FLASH_MAN_AMD:	printf ("AMD ");		break;
	case FLASH_MAN_FUJ:	printf ("FUJITSU ");		break;
	case FLASH_MAN_SST:	printf ("SST ");		break;
	case FLASH_MAN_STM:	printf ("STM ");		break;
	case FLASH_MAN_INTEL:	printf ("INTEL ");		break;
	default:		printf ("Unknown Vendor ");	break;
	}

	if (info->flash_id & 0x0001 ) {
	boottype = botboot;
	} else {
	boottype = topboot;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {
	case FLASH_AM400B:	printf ("AM29LV400B (4 Mbit%s",boottype);
				break;
	case FLASH_AM400T:	printf ("AM29LV400T (4 Mbit%s",boottype);
				break;
	case FLASH_AM800B:	printf ("AM29LV800B (8 Mbit%s",boottype);
				break;
	case FLASH_AM800T:	printf ("AM29LV800T (8 Mbit%s",boottype);
				break;
	case FLASH_AM160B:	printf ("AM29LV160B (16 Mbit%s",boottype);
				break;
	case FLASH_AM160T:	printf ("AM29LV160T (16 Mbit%s",boottype);
				break;
	case FLASH_AM320B:	printf ("AM29LV320B (32 Mbit%s",boottype);
				break;
	case FLASH_AM320T:	printf ("AM29LV320T (32 Mbit%s",boottype);
				break;
	case FLASH_INTEL800B:	printf ("INTEL28F800B (8 Mbit%s",boottype);
				break;
	case FLASH_INTEL800T:	printf ("INTEL28F800T (8 Mbit%s",boottype);
				break;
	case FLASH_INTEL160B:	printf ("INTEL28F160B (16 Mbit%s",boottype);
				break;
	case FLASH_INTEL160T:	printf ("INTEL28F160T (16 Mbit%s",boottype);
				break;
	case FLASH_INTEL320B:	printf ("INTEL28F320B (32 Mbit%s",boottype);
				break;
	case FLASH_INTEL320T:	printf ("INTEL28F320T (32 Mbit%s",boottype);
				break;

#if 0 /* enable when devices are available */

	case FLASH_INTEL640B:	printf ("INTEL28F640B (64 Mbit%s",boottype);
				break;
	case FLASH_INTEL640T:	printf ("INTEL28F640T (64 Mbit%s",boottype);
				break;
#endif
	case FLASH_28F320J3A:	printf ("INTEL28F320J3A (32 Mbit%s",boottype);
				break;
	case FLASH_28F640J3A:	printf ("INTEL28F640J3A (64 Mbit%s",boottype);
				break;
	case FLASH_28F128J3A:	printf ("INTEL28F128J3A (128 Mbit%s",boottype);
				break;

	default:		printf ("Unknown Chip Type\n");
				break;
	}

	printf ("  Size: %ld MB in %d Sectors\n",
		info->size >> 20, info->sector_count);

	printf ("  Sector Start Addresses:");
	for (i=0; i<info->sector_count; ++i) {
		if ((i % 5) == 0)
			printf ("\n   ");
		printf (" %08lX%s",
			info->start[i],
			info->protect[i] ? " (RO)" : "     "
		);
	}
	printf ("\n");
	return;
}


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


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

/*
 * The following code cannot be run from FLASH!
 */
ulong flash_get_size (volatile FLASH_WORD_SIZE *addr, flash_info_t *info)
{
	short i;
	ulong base = (ulong)addr;
	FLASH_WORD_SIZE value;

	/* Write auto select command: read Manufacturer ID */


#ifndef CFG_FLASH_16BIT

	/*
	 * Note: if it is an AMD flash and the word at addr[0000]
         * is 0x00890089 this routine will think it is an Intel
         * flash device and may(most likely) cause trouble.
	 */

	addr[0x0000] = 0x00900090;
	if(addr[0x0000] != 0x00890089){
		addr[0x0555] = 0x00AA00AA;
		addr[0x02AA] = 0x00550055;
		addr[0x0555] = 0x00900090;
#else

	/*
	 * Note: if it is an AMD flash and the word at addr[0000]
         * is 0x0089 this routine will think it is an Intel
         * flash device and may(most likely) cause trouble.
	 */

	addr[0x0000] = 0x0090;

	if(addr[0x0000] != 0x0089){
		addr[0x0555] = 0x00AA;
		addr[0x02AA] = 0x0055;
		addr[0x0555] = 0x0090;
#endif
	}
	value = addr[0];

	switch (value) {
	case (AMD_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_AMD;
		break;
	case (FUJ_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_FUJ;
		break;
	case (STM_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_STM;
		break;
	case (SST_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_SST;
		break;
	case (INTEL_MANUFACT & FLASH_ID_MASK):
		info->flash_id = FLASH_MAN_INTEL;
		break;
	default:
		info->flash_id = FLASH_UNKNOWN;
		info->sector_count = 0;
		info->size = 0;
		return (0);			/* no or unknown flash	*/

	}

	value = addr[1];			/* device ID		*/

	switch (value) {

	case (AMD_ID_LV400T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM400T;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV400B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM400B;
		info->sector_count = 11;
		info->size = 0x00100000;
		break;				/* => 1 MB		*/

	case (AMD_ID_LV800T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM800T;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (AMD_ID_LV800B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM800B;
		info->sector_count = 19;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (AMD_ID_LV160T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM160T;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (AMD_ID_LV160B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM160B;
		info->sector_count = 35;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/
#if 0	/* enable when device IDs are available */
	case (AMD_ID_LV320T & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320T;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case (AMD_ID_LV320B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 67;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/
#endif

	case (INTEL_ID_28F800B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL800T;
		info->sector_count = 23;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (INTEL_ID_28F800B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL800B;
		info->sector_count = 23;
		info->size = 0x00200000;
		break;				/* => 2 MB		*/

	case (INTEL_ID_28F160B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL160T;
		info->sector_count = 39;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (INTEL_ID_28F160B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL160B;
		info->sector_count = 39;
		info->size = 0x00400000;
		break;				/* => 4 MB		*/

	case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL320T;
		info->sector_count = 71;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

	case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 71;
		info->size = 0x00800000;
		break;				/* => 8 MB		*/

#if 0 /* enable when devices are available */
	case (INTEL_ID_28F320B3T & FLASH_ID_MASK):
		info->flash_id += FLASH_INTEL320T;
		info->sector_count = 135;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/

	case (INTEL_ID_28F320B3B & FLASH_ID_MASK):
		info->flash_id += FLASH_AM320B;
		info->sector_count = 135;
		info->size = 0x01000000;
		break;				/* => 16 MB		*/
#endif
	case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
		info->flash_id += FLASH_28F320J3A;
		info->sector_count = 32;