board/innokom/flash.c - platform/external/u-boot - Gitiles

 /*
  * (C) Copyright 2002
  * Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
  *
  * (C) Copyright 2002
  * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
  * Marius Groeger <mgroeger@sysgo.de>
  *
  * (C) Copyright 2002
  * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
  *
  * 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 <asm/arch/pxa-regs.h>

 #if defined CFG_JFFS_CUSTOM_PART
 #include <jffs2/jffs2.h>
 #endif

 /* Debugging macros ------------------------------------------------------  */

 #undef FLASH_DEBUG
 //#define FLASH_DEBUG 1

 /* Some debug macros */
 #if (FLASH_DEBUG > 2 )
 #define PRINTK3(args...) printf(args)
 #else
 #define PRINTK3(args...)
 #endif

 #if FLASH_DEBUG > 1
 #define PRINTK2(args...) printf(args)
 #else
 #define PRINTK2(args...)
 #endif

 #ifdef FLASH_DEBUG
 #define PRINTK(args...) printf(args)
 #else
 #define PRINTK(args...)
 #endif

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

 /* Development system: we have only 16 MB Flash                             */
 #ifdef CONFIG_MTD_INNOKOM_16MB
 #define FLASH_BANK_SIZE 0x01000000	/* 16 MB (during development)       */
 #define MAIN_SECT_SIZE  0x00020000	/* 128k per sector                  */
 #endif

 /* Production system: we have 64 MB Flash                                   */
 #ifdef CONFIG_MTD_INNOKOM_64MB
 #define FLASH_BANK_SIZE 0x04000000	/* 64 MB                            */
 #define MAIN_SECT_SIZE  0x00020000	/* 128k per sector                  */
 #endif

 flash_info_t    flash_info[CFG_MAX_FLASH_BANKS];


 #if defined CFG_JFFS_CUSTOM_PART

 /**
  * jffs2_part_info - get information about a JFFS2 partition
  *
  * @part_num: number of the partition you want to get info about
  * @return:   struct part_info* in case of success, 0 if failure
  */

 static struct part_info part;
 static int current_part = -1;

 #ifdef CONFIG_MTD_INNOKOM_16MB
 #ifdef CONFIG_MTD_INNOKOM_64MB
 #error Please define only one CONFIG_MTD_INNOKOM_XXMB option.
 #endif
 struct part_info* jffs2_part_info(int part_num) {
 	void *jffs2_priv_saved = part.jffs2_priv;

 	PRINTK2("jffs2_part_info: part_num=%i\n",part_num);

 	if (current_part == part_num)
 		return &part;

 	/* u-boot partition                                                 */
 	if(part_num==0){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00000000;
 		part.size=256*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* primary OS+firmware partition                                    */
 	if(part_num==1){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00040000;
 		part.size=768*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* secondary OS+firmware partition                                  */
 	if(part_num==2){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00100000;
 		part.size=8*1024*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* data partition */
 	if(part_num==3){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00900000;
 		part.size=7*1024*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	if (current_part == part_num) {
 		part.usr_priv = &current_part;
 		part.jffs2_priv = jffs2_priv_saved;
 		return &part;
 	}

 	PRINTK("jffs2_part_info: end of partition table\n");
 	return 0;
 }
 #endif /* CONFIG_MTD_INNOKOM_16MB */

 #ifdef CONFIG_MTD_INNOKOM_64MB
 #ifdef CONFIG_MTD_INNOKOM_16MB
 #error Please define only one CONFIG_MTD_INNOKOM_XXMB option.
 #endif
 struct part_info* jffs2_part_info(int part_num) {
 	void *jffs2_priv_saved = part.jffs2_priv;

 	PRINTK2("jffs2_part_info: part_num=%i\n",part_num);

 	if (current_part == part_num)
 		return &part;

 	/* u-boot partition                                                 */
 	if(part_num==0){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00000000;
 		part.size=256*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* primary OS+firmware partition                                    */
 	if(part_num==1){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x00040000;
 		part.size=16*1024*1024-128*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* secondary OS+firmware partition                                  */
 	if(part_num==2){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x01020000;
 		part.size=16*1024*1024-128*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	/* data partition */
 	if(part_num==3){
 		memset(&part, 0, sizeof(part));

 		part.offset=(char*)0x02000000;
 		part.size=32*1024*1024;

 		/* Mark the struct as ready */
 		current_part = part_num;

 		PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
 		PRINTK("part.size   = 0x%08x\n",(unsigned int)part.size);
 	}

 	if (current_part == part_num) {
 		part.usr_priv = &current_part;
 		part.jffs2_priv = jffs2_priv_saved;
 		return &part;
 	}

 	PRINTK("jffs2_part_info: end of partition table\n");
 	return 0;
 }
 #endif /* CONFIG_MTD_INNOKOM_64MB */
 #endif /* defined CFG_JFFS_CUSTOM_PART */


 /**
  * flash_init: - initialize data structures for flash chips
  *
  * @return: size of the flash
  */

 ulong flash_init(void)
 {
 	int i, j;
 	ulong size = 0;

 	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
 		ulong flashbase = 0;
 		flash_info[i].flash_id =
 	  		(INTEL_MANUFACT & FLASH_VENDMASK) |
 	  		(INTEL_ID_28F128J3 & FLASH_TYPEMASK);
 		flash_info[i].size = FLASH_BANK_SIZE;
 		flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
 		memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

 		switch (i) {
 			case 0:
 				flashbase = PHYS_FLASH_1;
 				break;
 			default:
 				panic("configured to many flash banks!\n");
 				break;
 		}
 		for (j = 0; j < flash_info[i].sector_count; j++) {
 			flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
 		}
 		size += flash_info[i].size;
 	}

 	/* Protect u-boot sectors */
 	flash_protect(FLAG_PROTECT_SET,
 			CFG_FLASH_BASE,
 			CFG_FLASH_BASE + (256*1024) - 1,
 			&flash_info[0]);

 #ifdef CFG_ENV_IS_IN_FLASH
 	flash_protect(FLAG_PROTECT_SET,
 			CFG_ENV_ADDR,
 			CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
 			&flash_info[0]);
 #endif

 	return size;
 }


 /**
  * flash_print_info: - print information about the flash situation
  *
  * @param info:
  */

 void flash_print_info  (flash_info_t *info)
 {
 	int i, j;

 	for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {

 		switch (info->flash_id & FLASH_VENDMASK) {

 			case (INTEL_MANUFACT & FLASH_VENDMASK):
 				printf("Intel: ");
 				break;
 			default:
 				printf("Unknown Vendor ");
 				break;
 		}

 		switch (info->flash_id & FLASH_TYPEMASK) {

 			case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
 				printf("28F128J3 (128Mbit)\n");
 				break;
 			default:
 				printf("Unknown Chip Type\n");
 				return;
 		}

 		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");
 		info++;
 	}
 }


 /**
  * flash_erase: - erase flash sectors
  *
  */

 int flash_erase(flash_info_t *info, int s_first, int s_last)
 {
 	int flag, prot, sect;
 	int rc = ERR_OK;

 	if (info->flash_id == FLASH_UNKNOWN)
 		return ERR_UNKNOWN_FLASH_TYPE;

 	if ((s_first < 0) || (s_first > s_last)) {
 		return ERR_INVAL;
 	}

 	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
 		return ERR_UNKNOWN_FLASH_VENDOR;

 	prot = 0;
 	for (sect=s_first; sect<=s_last; ++sect) {
 		if (info->protect[sect]) prot++;
 	}

 	if (prot) return ERR_PROTECTED;

 	/*
 	 * Disable interrupts which might cause a timeout
 	 * here. Remember that our exception vectors are
 	 * at address 0 in the flash, and we don't want a
 	 * (ticker) exception to happen while the flash
 	 * chip is in programming mode.
 	 */

 	flag = disable_interrupts();

 	/* Start erase on unprotected sectors */
 	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {

 		printf("Erasing sector %2d ... ", sect);

 		PRINTK("\n");

 		/* arm simple, non interrupt dependent timer */
 		reset_timer_masked();

 		if (info->protect[sect] == 0) {	/* not protected */
 			u16 * volatile addr = (u16 * volatile)(info->start[sect]);

 			PRINTK("unlocking sector\n");
 			*addr = 0x0060;
 			*addr = 0x00d0;
 			*addr = 0x00ff;

 			PRINTK("erasing sector\n");
 			*addr = 0x0020;
 			PRINTK("confirming erase\n");
 			*addr = 0x00D0;

 			while ((*addr & 0x0080) != 0x0080) {
 				PRINTK(".");
 				if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
 					*addr = 0x00B0; /* suspend erase*/
 					*addr = 0x00FF; /* read mode    */
 					rc = ERR_TIMOUT;
 					goto outahere;
 				}
 			}

 			PRINTK("clearing status register\n");
 			*addr = 0x0050;
 			PRINTK("resetting to read mode");
 			*addr = 0x00FF;
 		}

 		printf("ok.\n");
 	}

 	if (ctrlc()) printf("User Interrupt!\n");

 	outahere:

 	/* allow flash to settle - wait 10 ms */
 	udelay_masked(10000);

 	if (flag) enable_interrupts();

 	return rc;
 }


 /**
  * write_word: - copy memory to flash
  *
  * @param info:
  * @param dest:
  * @param data:
  * @return:
  */

 static int write_word (flash_info_t *info, ulong dest, ushort data)
 {
 	volatile u16 *addr = (u16 *)dest, val;
 	int rc = ERR_OK;
 	int flag;

 	/* Check if Flash is (sufficiently) erased */
 	if ((*addr & data) != data) return ERR_NOT_ERASED;

 	/*
 	 * Disable interrupts which might cause a timeout
 	 * here. Remember that our exception vectors are
 	 * at address 0 in the flash, and we don't want a
 	 * (ticker) exception to happen while the flash
 	 * chip is in programming mode.
 	 */
 	flag = disable_interrupts();

 	/* clear status register command */
 	*addr = 0x50;

 	/* program set-up command */
 	*addr = 0x40;

 	/* latch address/data */
 	*addr = data;

 	/* arm simple, non interrupt dependent timer */
 	reset_timer_masked();

 	/* wait while polling the status register */
 	while(((val = *addr) & 0x80) != 0x80) {
 		if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
 			rc = ERR_TIMOUT;
 			*addr = 0xB0; /* suspend program command */
 			goto outahere;
 		}
 	}

 	if(val & 0x1A) {	/* check for error */
 		printf("\nFlash write error %02x at address %08lx\n",
 			(int)val, (unsigned long)dest);
 		if(val & (1<<3)) {
 			printf("Voltage range error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		if(val & (1<<1)) {
 			printf("Device protect error.\n");
 			rc = ERR_PROTECTED;
 			goto outahere;
 		}
 		if(val & (1<<4)) {
 			printf("Programming error.\n");
 			rc = ERR_PROG_ERROR;
 			goto outahere;
 		}
 		rc = ERR_PROG_ERROR;
 		goto outahere;
 	}

 	outahere:

 	*addr = 0xFF; /* read array command */
 	if (flag) enable_interrupts();

 	return rc;
 }


 /**
  * write_buf: - Copy memory to flash.
  *
  * @param info:
  * @param src:	source of copy transaction
  * @param addr:	where to copy to
  * @param cnt: 	number of bytes to copy
  *
  * @return	error code
  */

 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
 {
 	ulong cp, wp;
 	ushort data;
 	int l;
 	int i, rc;

 	wp = (addr & ~1);	/* get lower word aligned address */

 	/*
 	 * handle unaligned start bytes
 	 */
 	if ((l = addr - wp) != 0) {
 		data = 0;
 		for (i=0, cp=wp; i<l; ++i, ++cp) {
 			data = (data >> 8) | (*(uchar *)cp << 8);
 		}
 		for (; i<2 && cnt>0; ++i) {
 			data = (data >> 8) | (*src++ << 8);
 			--cnt;
 			++cp;
 		}
 		for (; cnt==0 && i<2; ++i, ++cp) {
 			data = (data >> 8) | (*(uchar *)cp << 8);
 		}

 		if ((rc = write_word(info, wp, data)) != 0) {
 			return (rc);
 		}
 		wp += 2;
 	}

 	/*
 	 * handle word aligned part
 	 */
 	while (cnt >= 2) {
 		/* data = *((vushort*)src); */
 		data = *((ushort*)src);
 		if ((rc = write_word(info, wp, data)) != 0) {
 			return (rc);
 		}
 		src += 2;
 		wp  += 2;
 		cnt -= 2;
 	}

 	if (cnt == 0) return ERR_OK;

 	/*
 	 * handle unaligned tail bytes
 	 */
 	data = 0;
 	for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
 		data = (data >> 8) | (*src++ << 8);
 		--cnt;
 	}
 	for (; i<2; ++i, ++cp) {
 		data = (data >> 8) | (*(uchar *)cp << 8);
 	}

 	return write_word(info, wp, data);
 }
	/*
	* (C) Copyright 2002
	* Kyle Harris, Nexus Technologies, Inc. kharris@nexus-tech.net
	*
	* (C) Copyright 2002
	* Sysgo Real-Time Solutions, GmbH <www.elinos.com>
	* Marius Groeger <mgroeger@sysgo.de>
	*
	* (C) Copyright 2002
	* Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de>
	*
	* 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 <asm/arch/pxa-regs.h>

	#if defined CFG_JFFS_CUSTOM_PART
	#include <jffs2/jffs2.h>
	#endif

	/* Debugging macros ------------------------------------------------------ */

	#undef FLASH_DEBUG
	//#define FLASH_DEBUG 1

	/* Some debug macros */
	#if (FLASH_DEBUG > 2 )
	#define PRINTK3(args...) printf(args)
	#else
	#define PRINTK3(args...)
	#endif

	#if FLASH_DEBUG > 1
	#define PRINTK2(args...) printf(args)
	#else
	#define PRINTK2(args...)
	#endif

	#ifdef FLASH_DEBUG
	#define PRINTK(args...) printf(args)
	#else
	#define PRINTK(args...)
	#endif

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

	/* Development system: we have only 16 MB Flash */
	#ifdef CONFIG_MTD_INNOKOM_16MB
	#define FLASH_BANK_SIZE 0x01000000 /* 16 MB (during development) */
	#define MAIN_SECT_SIZE 0x00020000 /* 128k per sector */
	#endif

	/* Production system: we have 64 MB Flash */
	#ifdef CONFIG_MTD_INNOKOM_64MB
	#define FLASH_BANK_SIZE 0x04000000 /* 64 MB */
	#define MAIN_SECT_SIZE 0x00020000 /* 128k per sector */
	#endif

	flash_info_t flash_info[CFG_MAX_FLASH_BANKS];


	#if defined CFG_JFFS_CUSTOM_PART

	/**
	* jffs2_part_info - get information about a JFFS2 partition
	*
	* @part_num: number of the partition you want to get info about
	* @return: struct part_info* in case of success, 0 if failure
	*/

	static struct part_info part;
	static int current_part = -1;

	#ifdef CONFIG_MTD_INNOKOM_16MB
	#ifdef CONFIG_MTD_INNOKOM_64MB
	#error Please define only one CONFIG_MTD_INNOKOM_XXMB option.
	#endif
	struct part_info* jffs2_part_info(int part_num) {
	void *jffs2_priv_saved = part.jffs2_priv;

	PRINTK2("jffs2_part_info: part_num=%i\n",part_num);

	if (current_part == part_num)
	return ∂

	/* u-boot partition */
	if(part_num==0){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00000000;
	part.size=256*1024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* primary OS+firmware partition */
	if(part_num==1){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00040000;
	part.size=768*1024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* secondary OS+firmware partition */
	if(part_num==2){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00100000;
	part.size=810241024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* data partition */
	if(part_num==3){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00900000;
	part.size=710241024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	if (current_part == part_num) {
	part.usr_priv = &current_part;
	part.jffs2_priv = jffs2_priv_saved;
	return ∂
	}

	PRINTK("jffs2_part_info: end of partition table\n");
	return 0;
	}
	#endif /* CONFIG_MTD_INNOKOM_16MB */

	#ifdef CONFIG_MTD_INNOKOM_64MB
	#ifdef CONFIG_MTD_INNOKOM_16MB
	#error Please define only one CONFIG_MTD_INNOKOM_XXMB option.
	#endif
	struct part_info* jffs2_part_info(int part_num) {
	void *jffs2_priv_saved = part.jffs2_priv;

	PRINTK2("jffs2_part_info: part_num=%i\n",part_num);

	if (current_part == part_num)
	return ∂

	/* u-boot partition */
	if(part_num==0){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00000000;
	part.size=256*1024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* primary OS+firmware partition */
	if(part_num==1){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x00040000;
	part.size=1610241024-128*1024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* secondary OS+firmware partition */
	if(part_num==2){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x01020000;
	part.size=1610241024-128*1024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	/* data partition */
	if(part_num==3){
	memset(&part, 0, sizeof(part));

	part.offset=(char*)0x02000000;
	part.size=3210241024;

	/* Mark the struct as ready */
	current_part = part_num;

	PRINTK("part.offset = 0x%08x\n",(unsigned int)part.offset);
	PRINTK("part.size = 0x%08x\n",(unsigned int)part.size);
	}

	if (current_part == part_num) {
	part.usr_priv = &current_part;
	part.jffs2_priv = jffs2_priv_saved;
	return ∂
	}

	PRINTK("jffs2_part_info: end of partition table\n");
	return 0;
	}
	#endif /* CONFIG_MTD_INNOKOM_64MB */
	#endif /* defined CFG_JFFS_CUSTOM_PART */


	/**
	* flash_init: - initialize data structures for flash chips
	*
	* @return: size of the flash
	*/

	ulong flash_init(void)
	{
	int i, j;
	ulong size = 0;

	for (i = 0; i < CFG_MAX_FLASH_BANKS; i++) {
	ulong flashbase = 0;
	flash_info[i].flash_id =
	(INTEL_MANUFACT & FLASH_VENDMASK) \|
	(INTEL_ID_28F128J3 & FLASH_TYPEMASK);
	flash_info[i].size = FLASH_BANK_SIZE;
	flash_info[i].sector_count = CFG_MAX_FLASH_SECT;
	memset(flash_info[i].protect, 0, CFG_MAX_FLASH_SECT);

	switch (i) {
	case 0:
	flashbase = PHYS_FLASH_1;
	break;
	default:
	panic("configured to many flash banks!\n");
	break;
	}
	for (j = 0; j < flash_info[i].sector_count; j++) {
	flash_info[i].start[j] = flashbase + j*MAIN_SECT_SIZE;
	}
	size += flash_info[i].size;
	}

	/* Protect u-boot sectors */
	flash_protect(FLAG_PROTECT_SET,
	CFG_FLASH_BASE,
	CFG_FLASH_BASE + (256*1024) - 1,
	&flash_info[0]);

	#ifdef CFG_ENV_IS_IN_FLASH
	flash_protect(FLAG_PROTECT_SET,
	CFG_ENV_ADDR,
	CFG_ENV_ADDR + CFG_ENV_SIZE - 1,
	&flash_info[0]);
	#endif

	return size;
	}


	/**
	* flash_print_info: - print information about the flash situation
	*
	* @param info:
	*/

	void flash_print_info (flash_info_t *info)
	{
	int i, j;

	for (j=0; j<CFG_MAX_FLASH_BANKS; j++) {

	switch (info->flash_id & FLASH_VENDMASK) {

	case (INTEL_MANUFACT & FLASH_VENDMASK):
	printf("Intel: ");
	break;
	default:
	printf("Unknown Vendor ");
	break;
	}

	switch (info->flash_id & FLASH_TYPEMASK) {

	case (INTEL_ID_28F128J3 & FLASH_TYPEMASK):
	printf("28F128J3 (128Mbit)\n");
	break;
	default:
	printf("Unknown Chip Type\n");
	return;
	}

	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");
	info++;
	}
	}


	/**
	* flash_erase: - erase flash sectors
	*
	*/

	int flash_erase(flash_info_t *info, int s_first, int s_last)
	{
	int flag, prot, sect;
	int rc = ERR_OK;

	if (info->flash_id == FLASH_UNKNOWN)
	return ERR_UNKNOWN_FLASH_TYPE;

	if ((s_first < 0) \|\| (s_first > s_last)) {
	return ERR_INVAL;
	}

	if ((info->flash_id & FLASH_VENDMASK) != (INTEL_MANUFACT & FLASH_VENDMASK))
	return ERR_UNKNOWN_FLASH_VENDOR;

	prot = 0;
	for (sect=s_first; sect<=s_last; ++sect) {
	if (info->protect[sect]) prot++;
	}

	if (prot) return ERR_PROTECTED;

	/*
	* Disable interrupts which might cause a timeout
	* here. Remember that our exception vectors are
	* at address 0 in the flash, and we don't want a
	* (ticker) exception to happen while the flash
	* chip is in programming mode.
	*/

	flag = disable_interrupts();

	/* Start erase on unprotected sectors */
	for (sect = s_first; sect<=s_last && !ctrlc(); sect++) {

	printf("Erasing sector %2d ... ", sect);

	PRINTK("\n");

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked();

	if (info->protect[sect] == 0) { /* not protected */
	u16 * volatile addr = (u16 * volatile)(info->start[sect]);

	PRINTK("unlocking sector\n");
	*addr = 0x0060;
	*addr = 0x00d0;
	*addr = 0x00ff;

	PRINTK("erasing sector\n");
	*addr = 0x0020;
	PRINTK("confirming erase\n");
	*addr = 0x00D0;

	while ((*addr & 0x0080) != 0x0080) {
	PRINTK(".");
	if (get_timer_masked() > CFG_FLASH_ERASE_TOUT) {
	addr = 0x00B0; / suspend erase*/
	addr = 0x00FF; / read mode */
	rc = ERR_TIMOUT;
	goto outahere;
	}
	}

	PRINTK("clearing status register\n");
	*addr = 0x0050;
	PRINTK("resetting to read mode");
	*addr = 0x00FF;
	}

	printf("ok.\n");
	}

	if (ctrlc()) printf("User Interrupt!\n");

	outahere:

	/* allow flash to settle - wait 10 ms */
	udelay_masked(10000);

	if (flag) enable_interrupts();

	return rc;
	}


	/**
	* write_word: - copy memory to flash
	*
	* @param info:
	* @param dest:
	* @param data:
	* @return:
	*/

	static int write_word (flash_info_t *info, ulong dest, ushort data)
	{
	volatile u16 addr = (u16 )dest, val;
	int rc = ERR_OK;
	int flag;

	/* Check if Flash is (sufficiently) erased */
	if ((*addr & data) != data) return ERR_NOT_ERASED;

	/*
	* Disable interrupts which might cause a timeout
	* here. Remember that our exception vectors are
	* at address 0 in the flash, and we don't want a
	* (ticker) exception to happen while the flash
	* chip is in programming mode.
	*/
	flag = disable_interrupts();

	/* clear status register command */
	*addr = 0x50;

	/* program set-up command */
	*addr = 0x40;

	/* latch address/data */
	*addr = data;

	/* arm simple, non interrupt dependent timer */
	reset_timer_masked();

	/* wait while polling the status register */
	while(((val = *addr) & 0x80) != 0x80) {
	if (get_timer_masked() > CFG_FLASH_WRITE_TOUT) {
	rc = ERR_TIMOUT;
	addr = 0xB0; / suspend program command */
	goto outahere;
	}
	}

	if(val & 0x1A) { /* check for error */
	printf("\nFlash write error %02x at address %08lx\n",
	(int)val, (unsigned long)dest);
	if(val & (1<<3)) {
	printf("Voltage range error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	if(val & (1<<1)) {
	printf("Device protect error.\n");
	rc = ERR_PROTECTED;
	goto outahere;
	}
	if(val & (1<<4)) {
	printf("Programming error.\n");
	rc = ERR_PROG_ERROR;
	goto outahere;
	}
	rc = ERR_PROG_ERROR;
	goto outahere;
	}

	outahere:

	addr = 0xFF; / read array command */
	if (flag) enable_interrupts();

	return rc;
	}


	/**
	* write_buf: - Copy memory to flash.
	*
	* @param info:
	* @param src: source of copy transaction
	* @param addr: where to copy to
	* @param cnt: number of bytes to copy
	*
	* @return error code
	*/

	int write_buff (flash_info_t info, uchar src, ulong addr, ulong cnt)
	{
	ulong cp, wp;
	ushort data;
	int l;
	int i, rc;

	wp = (addr & ~1); /* get lower word aligned address */

	/*
	* handle unaligned start bytes
	*/
	if ((l = addr - wp) != 0) {
	data = 0;
	for (i=0, cp=wp; i<l; ++i, ++cp) {
	data = (data >> 8) \| ((uchar )cp << 8);
	}
	for (; i<2 && cnt>0; ++i) {
	data = (data >> 8) \| (*src++ << 8);
	--cnt;
	++cp;
	}
	for (; cnt==0 && i<2; ++i, ++cp) {
	data = (data >> 8) \| ((uchar )cp << 8);
	}

	if ((rc = write_word(info, wp, data)) != 0) {
	return (rc);
	}
	wp += 2;
	}

	/*
	* handle word aligned part
	*/
	while (cnt >= 2) {
	/* data = ((vushort)src); */
	data = ((ushort)src);
	if ((rc = write_word(info, wp, data)) != 0) {
	return (rc);
	}
	src += 2;
	wp += 2;
	cnt -= 2;
	}

	if (cnt == 0) return ERR_OK;

	/*
	* handle unaligned tail bytes
	*/
	data = 0;
	for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
	data = (data >> 8) \| (*src++ << 8);
	--cnt;
	}
	for (; i<2; ++i, ++cp) {
	data = (data >> 8) \| ((uchar )cp << 8);
	}

	return write_word(info, wp, data);
	}