flash.c

Linux2.4.27在AT91RM9200下的U-BOOT代码。可以在Redhat9等版本下使用。适合ARM学习者使用。

/*
 * (C) Masami Komiya <[e-mail]> 2004
 *
 * (C) Copyright 2001-2004
 * 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 *) CFG_FLASH_BASE,
				&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 (CFG_FLASH_BASE, &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;
	}
#ifdef CFG_FLASH_BASE_2
	/* 2 banks */
	else {
		size_b1 =
			flash_get_size ((volatile FLASH_WORD_SIZE *)
					CFG_FLASH_BASE_2, &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 */
#endif
	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             */