/* * vivi/drivers/mtd/nand/bon.c  * * Based on vivi/util/imagewrite * * $Id: bon.c,v 1.13 2003/06/12 11:14:01 nandy Exp $ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Description: Simple management routines for the bon file system. * */#include <config.h>#include <mtd/mtd.h>#include <mtd/nand_ecc.h>#include <printk.h>#include <errno.h>#include <heap.h>#include <string.h>#include <command.h>#include <ctype.h>extern struct mtd_info *mymtd;#if defined(CONFIG_S3C2410_MPORT3) || defined(CONFIG_S3C2410_MPORT1)#  define MAX_PART 		9#else#  define MAX_PART		5#endif#define MAX_RETRY		5#define PARTITION_OFFSET	(~0)#define IS_MTD  1#define IS_BON  0typedef struct {	ulong offset;	ulong size;	ulong flag;	ulong num_bad_block;	unsigned short *bad_blocks;} bon_partition_t;const char bon_part_magic[8] = {'M', 0, 0, 'I', 0, 'Z', 'I', 0};bon_partition_t parts[MAX_PART];int num_part;/* sector size啊 256牢 2M撈竅狼 NAND device綽 貿府竅瘤 給竊 */#define NAND_SECTOR_SIZE	512#define NAND_OOB_SIZE		16static voidmark_bad(struct mtd_info *mtd, ulong offset){	char oobbuf[NAND_OOB_SIZE];	memset (oobbuf, 0xff, NAND_OOB_SIZE);	oobbuf[5] = 0;	mtd->write_oob(mtd, offset, NAND_OOB_SIZE, NULL, oobbuf);}static intis_bad_block(struct mtd_info *mtd, ulong offset){	unsigned char oobbuf[NAND_OOB_SIZE];	char buf[NAND_SECTOR_SIZE];	struct erase_info erase;	size_t retlen;	erase.addr = offset;	erase.len = mtd->erasesize;	if (mtd->erase(mtd, &erase) < 0) return 1;	if (mtd->read_oob(mtd, offset, NAND_OOB_SIZE, &retlen, oobbuf)) {		return -1;	}	if (oobbuf[5] != 0xFF) return -1;	if (mtd->read(mtd, offset, NAND_SECTOR_SIZE, &retlen, buf)) {		return -1;	}	if (retlen != NAND_SECTOR_SIZE) {		printk("read error\n");		mark_bad(mtd, offset);		return -1;	}	return 0;}voidcheck_bad_block(struct mtd_info *mtd){	int i;	unsigned short bad_block[1024];	for (i = 0; i < num_part; i++) {		ulong offset = parts[i].offset;		ulong end = (i + 1 < num_part) ? parts[i+1].offset : mtd->size;		int num_bad = 0;		int bad;		printk("part = %d end = %ld\n", i, end);		while (offset < end) {			bad = is_bad_block(mtd, offset);			if (bad) {				bad_block[num_bad] = (offset - parts[i].offset) /\							mtd->erasesize;				num_bad++;				printk("%lX: is bad\n", offset);			}			offset += mtd->erasesize;		}		parts[i].num_bad_block = num_bad;#if 0 //  ???? - bushi		parts[i].flag = 0;#endif		if (num_bad) {			parts[i].bad_blocks = mmalloc(num_bad * sizeof(unsigned short));			memcpy(parts[i].bad_blocks, bad_block, num_bad * 2);		}		parts[i].size = end - parts[i].offset - num_bad * mtd->erasesize;	}	parts[num_part - 1].size -= mtd->erasesize;}static ulongcalc_ecc(char *buf, unsigned char *ecc){	nand_calculate_ecc(buf, ecc);	return 0;}static intwrite_oob(struct mtd_info *mtd, char *buf, ulong offset){	char oob_buf[NAND_OOB_SIZE];	unsigned char ecc[3];	memset(oob_buf, 0xFF, NAND_OOB_SIZE);	calc_ecc(buf, ecc);	memcpy(oob_buf + 8, ecc, 3);	calc_ecc(buf + 256, ecc);	memcpy(oob_buf + 11, ecc, 3);	if (mtd->write_oob(mtd, offset, NAND_OOB_SIZE, NULL, oob_buf))		return 1;	else		return 0;}static intwrite_block(struct mtd_info *mtd, ulong offset, char *buf){	int i;	size_t retlen = 0;	if (is_bad_block(mtd, offset)) return 1;	for (i = 0; i < (mtd->erasesize/NAND_SECTOR_SIZE); i++) {		if (mtd->write(mtd, offset, NAND_SECTOR_SIZE, &retlen, buf))			return 1;		if (retlen != NAND_SECTOR_SIZE)			return 1;		if (write_oob(mtd, buf, offset)) return 1;		offset += NAND_SECTOR_SIZE;		buf += NAND_SECTOR_SIZE;	}	return 0;}int write_bon_image(struct mtd_info *mtd, ulong offset, char *src, long size){	int bad_block_nr = 0;	/* NAND_SECTOR_SIZE*32 > meminfo.erasesize */	char buf[NAND_SECTOR_SIZE*32];	ulong block;	unsigned short *bad;	int i;	printk("size = %ld\n", size);	if (offset % mtd->erasesize) {		printk("bad alignment\n");		return -1;	}	for (i = 0; i < num_part; i++) {		if (parts[i].offset >= offset) break;	}	if (i == num_part) i = num_part - 1;	if (offset + size > parts[i].offset + parts[i].size) {		printk("image is too big for this partition\n");		return -1;	}	block = (offset - parts[i].offset) / mtd->erasesize;	bad = parts[i].bad_blocks;	if (bad) {		while (*bad++ <= block) block++;	}	offset = parts[i].offset + block * mtd->erasesize;	memcpy(buf, src, mtd->erasesize);	while (size > 0) {		if (write_block(mtd, offset, buf) == 0) {			size -= mtd->erasesize;			src += mtd->erasesize;			if (size > 0)				memcpy(buf, src, mtd->erasesize);		} else {			int k;			int block_nr = (offset - parts[i].offset) / mtd->erasesize;			for (k = 0; k < parts[i].num_bad_block; k++) {				if (block_nr == parts[i].bad_blocks[k]) break;			}			if (k == parts[i].num_bad_block) {				printk("*** warning: new bad block in %d\n", block_nr);				return -2;			}			bad_block_nr++;		}		offset += mtd->erasesize;	}	printk("bad_block = %d\n", bad_block_nr);	return 0;}intread_bon_partition(struct mtd_info *mtd){	int i, k;	unsigned char oobbuf[NAND_OOB_SIZE];	char buf[NAND_SECTOR_SIZE];	unsigned int *s;	ulong offset = PARTITION_OFFSET;	ssize_t retlen;	int ret;	if (offset > mtd->size - mtd->erasesize)		offset = mtd->size - mtd->erasesize;	if (!mtd->read_oob)		ret = -EOPNOTSUPP;	ret = mtd->read_oob(mtd, offset, NAND_OOB_SIZE, &retlen, oobbuf);	if (ret || oobbuf[5] != 0xFF)		return -2;		if (mtd->read(mtd, offset, NAND_SECTOR_SIZE, &retlen, buf))	   	return -3;	if (strncmp(buf, bon_part_magic, 8) != 0)		return -1;	s = (unsigned int *)(buf + 8);	num_part = *s++;	for (i = 0; i < num_part; i++) {		parts[i].offset = *s++;		parts[i].size = *s++;		parts[i].flag = *s++;	}	for (i = 0; i < num_part; i++) {		parts[i].num_bad_block = *s++;		if (parts[i].num_bad_block) {			parts[i].bad_blocks = mmalloc(parts[i].num_bad_block * sizeof(unsigned int));			for (k = 0; k < parts[i].num_bad_block;k++) {				parts[i].bad_blocks[k] = *s++;			}		} else {			parts[i].bad_blocks = 0;		}	}	return 0;}ulongread_size(char *s){	ulong size = 0;	while (isdigit(*s)) {		size = size * 10 + *s - '0';		s++;	}	if (*s == 'M' || *s == 'm') size *= 1024*1024;	else if (*s == 'K' || *s == 'k') size *= 1024;	else if (*s) {		printk("hmm bad size %s\n", s);	}	return size;}ulongread_flag(char *s){	ulong flag = 0;    	while ( *s && *s != ':' )		s++;	if (*s == 0) 		return IS_BON;	s++;	if (*s == 'm' || *s == 'M')		flag |= IS_MTD;	return flag;}intwrite_partition(struct mtd_info *mtd, ulong offset){	unsigned char oobbuf[NAND_OOB_SIZE];	char buf[NAND_SECTOR_SIZE];	struct erase_info erase;	unsigned int *s;	int i, k;	size_t retlen;	if (mtd->read_oob(mtd, offset, NAND_OOB_SIZE, &retlen, oobbuf))		return -1;	if (oobbuf[5] != 0xFF) return -1;	if (mtd->read(mtd, offset, NAND_SECTOR_SIZE, &retlen, buf)) {		printk("read error: mark bad: offset = %lX\n", offset);		mark_bad(mtd, offset);		return -1;	}	erase.addr = offset;	erase.len = mtd->erasesize;	if (mtd->erase(mtd, &erase) < 0) {		printk("erase error: mark bad: offset = %lX\n", offset);		mark_bad(mtd, offset);		return -1;	}	memcpy(buf, bon_part_magic, 8);	s = (unsigned int *)(buf+8);	*s++ = num_part;	for (i = 0; i < num_part; i++) {		*s++ = parts[i].offset;		*s++ = parts[i].size;		*s++ = parts[i].flag;	}	for (i = 0; i < num_part; i++) {		*s++ = parts[i].num_bad_block;		for (k = 0; k < parts[i].num_bad_block; k++) {			*s++ = parts[i].bad_blocks[k];			printk("k = %d block = %d\n", k, parts[i].bad_blocks[k]);		}	}	if (mtd->write(mtd, offset, NAND_SECTOR_SIZE, &retlen, buf))		return -1;	if (retlen != NAND_SECTOR_SIZE) {		printk("write error: offset = %lu\n", offset);		mark_bad(mtd, offset);		return -1;	}	return 0;}intwrite_partition_table(struct mtd_info *mtd){	int i, k;	ulong offset = PARTITION_OFFSET;		if (offset > mtd->size - mtd->erasesize)		offset = mtd->size - mtd->erasesize;	if (write_partition(mtd, offset) != 0) {		printk("can not write bon partition info\n");		return -1;	}	for (i = 0; i < num_part; i++) {		printk("part%d:\n", i);		printk("\toffset = %ld\n", parts[i].offset);		printk("\tsize = %ld\n", parts[i].size);		printk("\tbad_block = %ld\n", parts[i].num_bad_block);		for (k = 0; k < parts[i].num_bad_block; k++) {			printk(" %d\n", parts[i].bad_blocks[k]);		}	}	return 0;}void display_partition_table(void){	int i = 0, k;	unsigned int size;	if (read_bon_partition(mymtd)) {	   	printk("Invalid partition table info\n");		return;	}	printk("BON info. (%d partitions)\n", num_part);	printk("No: offset    \tsize        \tflags     bad\n");	printk("---------------------------------------------\n");	for (i = 0; i < num_part; i++) {	  printk("%2d: 0x%08lx\t0x%08lx\t%08lx  %3d",		 i, parts[i].offset, parts[i].size,		 parts[i].flag, parts[i].num_bad_block);	  print_disk_size(parts[i].size, "  ", "\n");	}}#ifdef CONFIG_CMD_BONFSstatic void display_help(void){	printk("Usage:\n");	printk("\tbon part info\n");	printk("\tbon part <offsets>\n");}static void command_part(int argc, const char **argv){	int i;	struct mtd_info *mtd = mymtd;	unsigned long ret;	if (mymtd == NULL) {		printk("we have not mtd\n");		return;	}	if ((argc == 3) &&		((strncmp("info", argv[2], 4) == 0) ||		 (strncmp("show", argv[2], 4) == 0))) {		display_partition_table();		return;	}	/* write partition table */	num_part = (argc - 2);	printk("doing partition\n");	for (i = 0; i < num_part; i++) {		parts[i].offset = read_size((char *)argv[2+i]);		printk("offset = %ld\n", parts[i].offset);		parts[i].flag = read_flag((char *)argv[2+i]);		printk("flag = %ld\n", parts[i].flag);	}	printk("check bad block\n");	check_bad_block(mtd);	write_partition_table(mtd);}void command_bon(int argc, const char **argv){	if (strncmp("help", argv[1], 4) == 0) {		display_help();		return;	}	if (strncmp("part", argv[1], 4) == 0) {		if (argc == 2) { 			display_help();			return;		}		command_part(argc, argv);		return;	}	display_help();}user_command_t bon_cmd = {	"bon",	command_bon,	NULL,	"bon [{cmds}]\t\t\t\t-- Manage the bon file system"};#endif /* CONFIG_CMD_BONFS */