/* * (C) Copyright 2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2002 * Robert Schwebel, Pengutronix, <r.schwebel@pengutronix.de> * * (C) Copyright 2003 * Kai-Uwe Bloem, Auerswald GmbH & Co KG, <linux-development@auerswald.de> * * (C) Copyright 2005 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * Added support for reading flash partition table from environment. * Parsing routines are based on driver/mtd/cmdline.c from the linux 2.4 * kernel tree. * * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $ * Copyright 2002 SYSGO Real-Time Solutions GmbH * * 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 */ /* * Three environment variables are used by the parsing routines: * * 'partition' - keeps current partition identifier * * partition := <part-id> * <part-id> := <dev-id>,part_num * * * 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping * * mtdids=<idmap>[,<idmap>,...] * * <idmap> := <dev-id>=<mtd-id> * <dev-id> := 'nand'|'nor'|'onenand'<dev-num> * <dev-num> := mtd device number, 0... * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name) * * * 'mtdparts' - partition list * * mtdparts=mtdparts=<mtd-def>[;<mtd-def>...] * * <mtd-def> := <mtd-id>:<part-def>[,<part-def>...] * <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name) * <part-def> := <size>[@<offset>][<name>][<ro-flag>] * <size> := standard linux memsize OR '-' to denote all remaining space * <offset> := partition start offset within the device * <name> := '(' NAME ')' * <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel) * * Notes: * - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping * - if the above variables are not set defaults for a given target are used * * Examples: * * 1 NOR Flash, with 1 single writable partition: * mtdids=nor0=edb7312-nor * mtdparts=mtdparts=edb7312-nor:- * * 1 NOR Flash with 2 partitions, 1 NAND with one * mtdids=nor0=edb7312-nor,nand0=edb7312-nand * mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home) * */ /* * JFFS2/CRAMFS support */ #include <common.h> #include <command.h> #include <malloc.h> #include <jffs2/jffs2.h> #include <linux/list.h> #include <linux/ctype.h> #include <cramfs/cramfs_fs.h> #if defined(CONFIG_CMD_NAND) #ifdef CONFIG_NAND_LEGACY #include <linux/mtd/nand_legacy.h> #else /* !CONFIG_NAND_LEGACY */ #include <linux/mtd/nand.h> #include <nand.h> #endif /* !CONFIG_NAND_LEGACY */ #endif #if defined(CONFIG_CMD_ONENAND) #include <linux/mtd/mtd.h> #include <linux/mtd/onenand.h> #include <onenand_uboot.h> #endif /* enable/disable debugging messages */ #define DEBUG_MTDPARTS #undef DEBUG_MTDPARTS #ifdef DEBUG_MTDPARTS # define DEBUGF(fmt, args...) printf(fmt ,##args) #else # define DEBUGF(fmt, args...) #endif /* special size referring to all the remaining space in a partition */ #define SIZE_REMAINING 0xFFFFFFFF /* special offset value, it is used when not provided by user * * this value is used temporarily during parsing, later such offests * are recalculated */ #define OFFSET_NOT_SPECIFIED 0xFFFFFFFF /* minimum partition size */ #define MIN_PART_SIZE 4096 /* this flag needs to be set in part_info struct mask_flags * field for read-only partitions */ #define MTD_WRITEABLE_CMD 1 /* default values for mtdids and mtdparts variables */ #if defined(MTDIDS_DEFAULT) static const char *const mtdids_default = MTDIDS_DEFAULT; #else #warning "MTDIDS_DEFAULT not defined!" static const char *const mtdids_default = NULL; #endif #if defined(MTDPARTS_DEFAULT) static const char *const mtdparts_default = MTDPARTS_DEFAULT; #else #warning "MTDPARTS_DEFAULT not defined!" static const char *const mtdparts_default = NULL; #endif /* copies of last seen 'mtdids', 'mtdparts' and 'partition' env variables */ #define MTDIDS_MAXLEN 128 #define MTDPARTS_MAXLEN 512 #define PARTITION_MAXLEN 16 static char last_ids[MTDIDS_MAXLEN]; static char last_parts[MTDPARTS_MAXLEN]; static char last_partition[PARTITION_MAXLEN]; /* low level jffs2 cache cleaning routine */ extern void jffs2_free_cache(struct part_info *part); /* mtdids mapping list, filled by parse_ids() */ struct list_head mtdids; /* device/partition list, parse_cmdline() parses into here */ struct list_head devices; /* current active device and partition number */ static struct mtd_device *current_dev = NULL; static u8 current_partnum = 0; static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num); /* command line only routines */ static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len); static int device_del(struct mtd_device *dev); /** * Parses a string into a number. The number stored at ptr is * potentially suffixed with K (for kilobytes, or 1024 bytes), * M (for megabytes, or 1048576 bytes), or G (for gigabytes, or * 1073741824). If the number is suffixed with K, M, or G, then * the return value is the number multiplied by one kilobyte, one * megabyte, or one gigabyte, respectively. * * @param ptr where parse begins * @param retptr output pointer to next char after parse completes (output) * @return resulting unsigned int */ static unsigned long memsize_parse (const char *const ptr, const char **retptr) { unsigned long ret = simple_strtoul(ptr, (char **)retptr, 0); switch (**retptr) { case 'G': case 'g': ret <<= 10; case 'M': case 'm': ret <<= 10; case 'K': case 'k': ret <<= 10; (*retptr)++; default: break; } return ret; } /** * Format string describing supplied size. This routine does the opposite job * to memsize_parse(). Size in bytes is converted to string and if possible * shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix. * * Note, that this routine does not check for buffer overflow, it's the caller * who must assure enough space. * * @param buf output buffer * @param size size to be converted to string */ static void memsize_format(char *buf, u32 size) { #define SIZE_GB ((u32)1024*1024*1024) #define SIZE_MB ((u32)1024*1024) #define SIZE_KB ((u32)1024) if ((size % SIZE_GB) == 0) sprintf(buf, "%ug", size/SIZE_GB); else if ((size % SIZE_MB) == 0) sprintf(buf, "%um", size/SIZE_MB); else if (size % SIZE_KB == 0) sprintf(buf, "%uk", size/SIZE_KB); else sprintf(buf, "%u", size); } /** * This routine does global indexing of all partitions. Resulting index for * current partition is saved in 'mtddevnum'. Current partition name in * 'mtddevname'. */ static void index_partitions(void) { char buf[16]; u16 mtddevnum; struct part_info *part; struct list_head *dentry; struct mtd_device *dev; DEBUGF("--- index partitions ---\n"); if (current_dev) { mtddevnum = 0; list_for_each(dentry, &devices) { dev = list_entry(dentry, struct mtd_device, link); if (dev == current_dev) { mtddevnum += current_partnum; sprintf(buf, "%d", mtddevnum); setenv("mtddevnum", buf); break; } mtddevnum += dev->num_parts; } part = mtd_part_info(current_dev, current_partnum); setenv("mtddevname", part->name); DEBUGF("=> mtddevnum %d,\n=> mtddevname %s\n", mtddevnum, part->name); } else { setenv("mtddevnum", NULL); setenv("mtddevname", NULL); DEBUGF("=> mtddevnum NULL\n=> mtddevname NULL\n"); } } /** * Save current device and partition in environment variable 'partition'. */ static void current_save(void) { char buf[16]; DEBUGF("--- current_save ---\n"); if (current_dev) { sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_dev->id->type), current_dev->id->num, current_partnum); setenv("partition", buf); strncpy(last_partition, buf, 16); DEBUGF("=> partition %s\n", buf); } else { setenv("partition", NULL); last_partition[0] = '\0'; DEBUGF("=> partition NULL\n"); } index_partitions(); } /** * Performs sanity check for supplied NOR flash partition. Table of existing * NOR flash devices is searched and partition device is located. Alignment * with the granularity of NOR flash sectors is verified. * * @param id of the parent device * @param part partition to validate * @return 0 if partition is valid, 1 otherwise */ static int part_validate_nor(struct mtdids *id, struct part_info *part) { #if defined(CONFIG_CMD_FLASH) /* info for FLASH chips */ extern flash_info_t flash_info[]; flash_info_t *flash; int offset_aligned; u32 end_offset, sector_size = 0; int i; flash = &flash_info[id->num]; /* size of last sector */ part->sector_size = flash->size - (flash->start[flash->sector_count-1] - flash->start[0]); offset_aligned = 0; for (i = 0; i < flash->sector_count; i++) { if ((flash->start[i] - flash->start[0]) == part->offset) { offset_aligned = 1; break; } } if (offset_aligned == 0) { printf("%s%d: partition (%s) start offset alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } end_offset = part->offset + part->size; offset_aligned = 0; for (i = 0; i < flash->sector_count; i++) { if (i) { sector_size = flash->start[i] - flash->start[i-1]; if (part->sector_size < sector_size) part->sector_size = sector_size; } if ((flash->start[i] - flash->start[0]) == end_offset) offset_aligned = 1; } if (offset_aligned || flash->size == end_offset) return 0; printf("%s%d: partition (%s) size alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); #endif return 1; } /** * Performs sanity check for supplied NAND flash partition. Table of existing * NAND flash devices is searched and partition device is located. Alignment * with the granularity of nand erasesize is verified. * * @param id of the parent device * @param part partition to validate * @return 0 if partition is valid, 1 otherwise */ static int part_validate_nand(struct mtdids *id, struct part_info *part) { #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND) /* info for NAND chips */ nand_info_t *nand; nand = &nand_info[id->num]; part->sector_size = nand->erasesize; if ((unsigned long)(part->offset) % nand->erasesize) { printf("%s%d: partition (%s) start offset alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } if (part->size % nand->erasesize) { printf("%s%d: partition (%s) size alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } return 0; #else return 1; #endif } /** * Performs sanity check for supplied OneNAND flash partition. * Table of existing OneNAND flash devices is searched and partition device * is located. Alignment with the granularity of nand erasesize is verified. * * @param id of the parent device * @param part partition to validate * @return 0 if partition is valid, 1 otherwise */ static int part_validate_onenand(struct mtdids *id, struct part_info *part) { #if defined(CONFIG_CMD_ONENAND) /* info for OneNAND chips */ struct mtd_info *mtd; mtd = &onenand_mtd; part->sector_size = mtd->erasesize; if ((unsigned long)(part->offset) % mtd->erasesize) { printf("%s%d: partition (%s) start offset" "alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } if (part->size % mtd->erasesize) { printf("%s%d: partition (%s) size alignment incorrect\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } return 0; #else return 1; #endif } /** * Performs sanity check for supplied partition. Offset and size are verified * to be within valid range. Partition type is checked and either * parts_validate_nor() or parts_validate_nand() is called with the argument * of part. * * @param id of the parent device * @param part partition to validate * @return 0 if partition is valid, 1 otherwise */ static int part_validate(struct mtdids *id, struct part_info *part) { if (part->size == SIZE_REMAINING) part->size = id->size - part->offset; if (part->offset > id->size) { printf("%s: offset %08x beyond flash size %08x\n", id->mtd_id, part->offset, id->size); return 1; } if ((part->offset + part->size) <= part->offset) { printf("%s%d: partition (%s) size too big\n", MTD_DEV_TYPE(id->type), id->num, part->name); return 1; } if (part->offset + part->size > id->size) { printf("%s: partitioning exceeds flash size\n", id->mtd_id); return 1; } if (id->type == MTD_DEV_TYPE_NAND) return part_validate_nand(id, part); else if (id->type == MTD_DEV_TYPE_NOR) return part_validate_nor(id, part); else if (id->type == MTD_DEV_TYPE_ONENAND) return part_validate_onenand(id, part); else DEBUGF("part_validate: invalid dev type\n"); return 1; } /** * Delete selected partition from the partion list of the specified device. * * @param dev device to delete partition from * @param part partition to delete * @return 0 on success, 1 otherwise */ static int part_del(struct mtd_device *dev, struct part_info *part) { u8 current_save_needed = 0; /* if there is only one partition, remove whole device */ if (dev->num_parts == 1) return device_del(dev); /* otherwise just delete this partition */ if (dev == current_dev) { /* we are modyfing partitions for the current device, * update current */ struct part_info *curr_pi; curr_pi = mtd_part_info(current_dev, current_partnum); if (curr_pi) { if (curr_pi == part) { printf("current partition deleted, resetting current to 0\n"); current_partnum = 0; } else if (part->offset <= curr_pi->offset) { current_partnum--; } current_save_needed = 1; } } #ifdef CONFIG_NAND_LEGACY jffs2_free_cache(part); #endif list_del(&part->link); free(part); dev->num_parts--; if (current_save_needed > 0) current_save(); else index_partitions(); return 0; } /** * Delete all partitions from parts head list, free memory. * * @param head list of partitions to delete */ static void part_delall(struct list_head *head) { struct list_head *entry, *n; struct part_info *part_tmp; /* clean tmp_list and free allocated memory */ list_for_each_safe(entry, n, head) { part_tmp = list_entry(entry, struct part_info, link); #ifdef CONFIG_NAND_LEGACY jffs2_free_cache(part_tmp); #endif list_del(entry); free(part_tmp); } } /** * Add new partition to the supplied partition list. Make sure partitions are * sorted by offset in ascending order. * * @param head list this partition is to be added to * @param new partition to be added */ static int part_sort_add(struct mtd_device *dev, struct part_info *part) { struct list_head *entry; struct part_info *new_pi, *curr_pi; /* link partition to parrent dev */ part->dev = dev; if (list_empty(&dev->parts)) { DEBUGF("part_sort_add: list empty\n"); list_add(&part->link, &dev->parts); dev->num_parts++; index_partitions(); return 0; } new_pi = list_entry(&part->link, struct part_info, link); /* get current partition info if we are updating current device */ curr_pi = NULL; if (dev == current_dev) curr_pi = mtd_part_info(current_dev, current_partnum); list_for_each(entry, &dev->parts) { struct part_info *pi; pi = list_entry(entry, struct part_info, link); /* be compliant with kernel cmdline, allow only one partition at offset zero */ if ((new_pi->offset == pi->offset) && (pi->offset == 0)) { printf("cannot add second partition at offset 0\n"); return 1; } if (new_pi->offset <= pi->offset) { list_add_tail(&part->link, entry); dev->num_parts++; if (curr_pi && (pi->offset <= curr_pi->offset)) { /* we are modyfing partitions for the current * device, update current */ current_partnum++; current_save(); } else { index_partitions(); } return 0; } } list_add_tail(&part->link, &dev->parts); dev->num_parts++; index_partitions(); return 0; } /** * Add provided partition to the partition list of a given device. * * @param dev device to which partition is added * @param part partition to be added * @return 0 on success, 1 otherwise */ static int part_add(struct mtd_device *dev, struct part_info *part) { /* verify alignment and size */ if (part_validate(dev->id, part) != 0) return 1; /* partition is ok, add it to the list */ if (part_sort_add(dev, part) != 0) return 1; return 0; } /** * Parse one partition definition, allocate memory and return pointer to this * location in retpart. * * @param partdef pointer to the partition definition string i.e. <part-def> * @param ret output pointer to next char after parse completes (output) * @param retpart pointer to the allocated partition (output) * @return 0 on success, 1 otherwise */ static int part_parse(const char *const partdef, const char **ret, struct part_info **retpart) { struct part_info *part; unsigned long size; unsigned long offset; const char *name; int name_len; unsigned int mask_flags; const char *p; p = partdef; *retpart = NULL; *ret = NULL; /* fetch the partition size */ if (*p == '-') { /* assign all remaining space to this partition */ DEBUGF("'-': remaining size assigned\n"); size = SIZE_REMAINING; p++; } else { size = memsize_parse(p, &p); if (size < MIN_PART_SIZE) { printf("partition size too small (%lx)\n", size); return 1; } } /* check for offset */ offset = OFFSET_NOT_SPECIFIED; if (*p == '@') { p++; offset = memsize_parse(p, &p); } /* now look for the name */ if (*p == '(') { name = ++p; if ((p = strchr(name, ')')) == NULL) { printf("no closing ) found in partition name\n"); return 1; } name_len = p - name + 1; if ((name_len - 1) == 0) { printf("empty partition name\n"); return 1; } p++; } else { /* 0x00000000@0x00000000 */ name_len = 22; name = NULL; } /* test for options */ mask_flags = 0; if (strncmp(p, "ro", 2) == 0) { mask_flags |= MTD_WRITEABLE_CMD; p += 2; } /* check for next partition definition */ if (*p == ',') { if (size == SIZE_REMAINING) { *ret = NULL; printf("no partitions allowed after a fill-up partition\n"); return 1; } *ret = ++p; } else if ((*p == ';') || (*p == '\0')) { *ret = p; } else { printf("unexpected character '%c' at the end of partition\n", *p); *ret = NULL; return 1; } /* allocate memory */ part = (struct part_info *)malloc(sizeof(struct part_info) + name_len); if (!part) { printf("out of memory\n"); return 1; } memset(part, 0, sizeof(struct part_info) + name_len); part->size = size; part->offset = offset; part->mask_flags = mask_flags; part->name = (char *)(part + 1); if (name) { /* copy user provided name */ strncpy(part->name, name, name_len - 1); part->auto_name = 0; } else { /* auto generated name in form of size@offset */ sprintf(part->name, "0x%08lx@0x%08lx", size, offset); part->auto_name = 1; } part->name[name_len - 1] = '\0'; INIT_LIST_HEAD(&part->link); DEBUGF("+ partition: name %-22s size 0x%08x offset 0x%08x mask flags %d\n", part->name, part->size, part->offset, part->mask_flags); *retpart = part; return 0; } /** * Check device number to be within valid range for given device type. * * @param dev device to validate * @return 0 if device is valid, 1 otherwise */ int mtd_device_validate(u8 type, u8 num, u32 *size) { if (type == MTD_DEV_TYPE_NOR) { #if defined(CONFIG_CMD_FLASH) if (num < CONFIG_SYS_MAX_FLASH_BANKS) { extern flash_info_t flash_info[]; *size = flash_info[num].size; return 0; } printf("no such FLASH device: %s%d (valid range 0 ... %d\n", MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_FLASH_BANKS - 1); #else printf("support for FLASH devices not present\n"); #endif } else if (type == MTD_DEV_TYPE_NAND) { #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND) if (num < CONFIG_SYS_MAX_NAND_DEVICE) { #ifndef CONFIG_NAND_LEGACY *size = nand_info[num].size; #else extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE]; *size = nand_dev_desc[num].totlen; #endif return 0; } printf("no such NAND device: %s%d (valid range 0 ... %d)\n", MTD_DEV_TYPE(type), num, CONFIG_SYS_MAX_NAND_DEVICE - 1); #else printf("support for NAND devices not present\n"); #endif } else if (type == MTD_DEV_TYPE_ONENAND) { #if defined(CONFIG_CMD_ONENAND) *size = onenand_mtd.size; return 0; #else printf("support for OneNAND devices not present\n"); #endif } else printf("Unknown defice type %d\n", type); return 1; } /** * Delete all mtd devices from a supplied devices list, free memory allocated for * each device and delete all device partitions. * * @return 0 on success, 1 otherwise */ static int device_delall(struct list_head *head) { struct list_head *entry, *n; struct mtd_device *dev_tmp; /* clean devices list */ list_for_each_safe(entry, n, head) { dev_tmp = list_entry(entry, struct mtd_device, link); list_del(entry); part_delall(&dev_tmp->parts); free(dev_tmp); } INIT_LIST_HEAD(&devices); return 0; } /** * If provided device exists it's partitions are deleted, device is removed * from device list and device memory is freed. * * @param dev device to be deleted * @return 0 on success, 1 otherwise */ static int device_del(struct mtd_device *dev) { part_delall(&dev->parts); list_del(&dev->link); free(dev); if (dev == current_dev) { /* we just deleted current device */ if (list_empty(&devices)) { current_dev = NULL; } else { /* reset first partition from first dev from the * devices list as current */ current_dev = list_entry(devices.next, struct mtd_device, link); current_partnum = 0; } current_save(); return 0; } index_partitions(); return 0; } /** * Search global device list and return pointer to the device of type and num * specified. * * @param type device type * @param num device number * @return NULL if requested device does not exist */ static struct mtd_device* device_find(u8 type, u8 num) { struct list_head *entry; struct mtd_device *dev_tmp; list_for_each(entry, &devices) { dev_tmp = list_entry(entry, struct mtd_device, link); if ((dev_tmp->id->type == type) && (dev_tmp->id->num == num)) return dev_tmp; } return NULL; } /** * Add specified device to the global device list. * * @param dev device to be added */ static void device_add(struct mtd_device *dev) { u8 current_save_needed = 0; if (list_empty(&devices)) { current_dev = dev; current_partnum = 0; current_save_needed = 1; } list_add_tail(&dev->link, &devices); if (current_save_needed > 0) current_save(); else index_partitions(); } /** * Parse device type, name and mtd-id. If syntax is ok allocate memory and * return pointer to the device structure. * * @param mtd_dev pointer to the device definition string i.e. <mtd-dev> * @param ret output pointer to next char after parse completes (output) * @param retdev pointer to the allocated device (output) * @return 0 on success, 1 otherwise */ static int device_parse(const char *const mtd_dev, const char **ret, struct mtd_device **retdev) { struct mtd_device *dev; struct part_info *part; struct mtdids *id; const char *mtd_id; unsigned int mtd_id_len; const char *p, *pend; LIST_HEAD(tmp_list); struct list_head *entry, *n; u16 num_parts; u32 offset; int err = 1; p = mtd_dev; *retdev = NULL; *ret = NULL; DEBUGF("===device_parse===\n"); /* fetch <mtd-id> */ mtd_id = p; if (!(p = strchr(mtd_id, ':'))) { printf("no <mtd-id> identifier\n"); return 1; } mtd_id_len = p - mtd_id + 1; p++; /* verify if we have a valid device specified */ if ((id = id_find_by_mtd_id(mtd_id, mtd_id_len - 1)) == NULL) { printf("invalid mtd device '%.*s'\n", mtd_id_len - 1, mtd_id); return 1; } DEBUGF("dev type = %d (%s), dev num = %d, mtd-id = %s\n", id->type, MTD_DEV_TYPE(id->type), id->num, id->mtd_id); pend = strchr(p, ';'); DEBUGF("parsing partitions %.*s\n", (pend ? pend - p : strlen(p)), p); /* parse partitions */ num_parts = 0; offset = 0; if ((dev = device_find(id->type, id->num)) != NULL) { /* if device already exists start at the end of the last partition */ part = list_entry(dev->parts.prev, struct part_info, link); offset = part->offset + part->size; } while (p && (*p != '\0') && (*p != ';')) { err = 1; if ((part_parse(p, &p, &part) != 0) || (!part)) break; /* calculate offset when not specified */ if (part->offset == OFFSET_NOT_SPECIFIED) part->offset = offset; else offset = part->offset; /* verify alignment and size */ if (part_validate(id, part) != 0) break; offset += part->size; /* partition is ok, add it to the list */ list_add_tail(&part->link, &tmp_list); num_parts++; err = 0; } if (err == 1) { part_delall(&tmp_list); return 1; } if (num_parts == 0) { printf("no partitions for device %s%d (%s)\n", MTD_DEV_TYPE(id->type), id->num, id->mtd_id); return 1; } DEBUGF("\ntotal partitions: %d\n", num_parts); /* check for next device presence */ if (p) { if (*p == ';') { *ret = ++p; } else if (*p == '\0') { *ret = p; } else { printf("unexpected character '%c' at the end of device\n", *p); *ret = NULL; return 1; } } /* allocate memory for mtd_device structure */ if ((dev = (struct mtd_device *)malloc(sizeof(struct mtd_device))) == NULL) { printf("out of memory\n"); return 1; } memset(dev, 0, sizeof(struct mtd_device)); dev->id = id; dev->num_parts = 0; /* part_sort_add increments num_parts */ INIT_LIST_HEAD(&dev->parts); INIT_LIST_HEAD(&dev->link); /* move partitions from tmp_list to dev->parts */ list_for_each_safe(entry, n, &tmp_list) { part = list_entry(entry, struct part_info, link); list_del(entry); if (part_sort_add(dev, part) != 0) { device_del(dev); return 1; } } *retdev = dev; DEBUGF("===\n\n"); return 0; } /** * Initialize global device list. * * @return 0 on success, 1 otherwise */ static int mtd_devices_init(void) { last_parts[0] = '\0'; current_dev = NULL; current_save(); return device_delall(&devices); } /* * Search global mtdids list and find id of requested type and number. * * @return pointer to the id if it exists, NULL otherwise */ static struct mtdids* id_find(u8 type, u8 num) { struct list_head *entry; struct mtdids *id; list_for_each(entry, &mtdids) { id = list_entry(entry, struct mtdids, link); if ((id->type == type) && (id->num == num)) return id; } return NULL; } /** * Search global mtdids list and find id of a requested mtd_id. * * Note: first argument is not null terminated. * * @param mtd_id string containing requested mtd_id * @param mtd_id_len length of supplied mtd_id * @return pointer to the id if it exists, NULL otherwise */ static struct mtdids* id_find_by_mtd_id(const char *mtd_id, unsigned int mtd_id_len) { struct list_head *entry; struct mtdids *id; DEBUGF("--- id_find_by_mtd_id: '%.*s' (len = %d)\n", mtd_id_len, mtd_id, mtd_id_len); list_for_each(entry, &mtdids) { id = list_entry(entry, struct mtdids, link); DEBUGF("entry: '%s' (len = %d)\n", id->mtd_id, strlen(id->mtd_id)); if (mtd_id_len != strlen(id->mtd_id)) continue; if (strncmp(id->mtd_id, mtd_id, mtd_id_len) == 0) return id; } return NULL; } /** * Parse device id string <dev-id> := 'nand'|'nor'|'onenand'<dev-num>, * return device type and number. * * @param id string describing device id * @param ret_id output pointer to next char after parse completes (output) * @param dev_type parsed device type (output) * @param dev_num parsed device number (output) * @return 0 on success, 1 otherwise */ int mtd_id_parse(const char *id, const char **ret_id, u8 *dev_type, u8 *dev_num) { const char *p = id; *dev_type = 0; if (strncmp(p, "nand", 4) == 0) { *dev_type = MTD_DEV_TYPE_NAND; p += 4; } else if (strncmp(p, "nor", 3) == 0) { *dev_type = MTD_DEV_TYPE_NOR; p += 3; } else if (strncmp(p, "onenand", 7) == 0) { *dev_type = MTD_DEV_TYPE_ONENAND; p += 7; } else { printf("incorrect device type in %s\n", id); return 1; } if (!isdigit(*p)) { printf("incorrect device number in %s\n", id); return 1; } *dev_num = simple_strtoul(p, (char **)&p, 0); if (ret_id) *ret_id = p; return 0; } /** * Process all devices and generate corresponding mtdparts string describing * all partitions on all devices. * * @param buf output buffer holding generated mtdparts string (output) * @param buflen buffer size * @return 0 on success, 1 otherwise */ static int generate_mtdparts(char *buf, u32 buflen) { struct list_head *pentry, *dentry; struct mtd_device *dev; struct part_info *part, *prev_part; char *p = buf; char tmpbuf[32]; u32 size, offset, len, part_cnt; u32 maxlen = buflen - 1; DEBUGF("--- generate_mtdparts ---\n"); if (list_empty(&devices)) { buf[0] = '\0'; return 0; } sprintf(p, "mtdparts="); p += 9; list_for_each(dentry, &devices) { dev = list_entry(dentry, struct mtd_device, link); /* copy mtd_id */ len = strlen(dev->id->mtd_id) + 1; if (len > maxlen) goto cleanup; memcpy(p, dev->id->mtd_id, len - 1); p += len - 1; *(p++) = ':'; maxlen -= len; /* format partitions */ prev_part = NULL; part_cnt = 0; list_for_each(pentry, &dev->parts) { part = list_entry(pentry, struct part_info, link); size = part->size; offset = part->offset; part_cnt++; /* partition size */ memsize_format(tmpbuf, size); len = strlen(tmpbuf); if (len > maxlen) goto cleanup; memcpy(p, tmpbuf, len); p += len; maxlen -= len; /* add offset only when there is a gap between * partitions */ if ((!prev_part && (offset != 0)) || (prev_part && ((prev_part->offset + prev_part->size) != part->offset))) { memsize_format(tmpbuf, offset); len = strlen(tmpbuf) + 1; if (len > maxlen) goto cleanup; *(p++) = '@'; memcpy(p, tmpbuf, len - 1); p += len - 1; maxlen -= len; } /* copy name only if user supplied */ if(!part->auto_name) { len = strlen(part->name) + 2; if (len > maxlen) goto cleanup; *(p++) = '('; memcpy(p, part->name, len - 2); p += len - 2; *(p++) = ')'; maxlen -= len; } /* ro mask flag */ if (part->mask_flags && MTD_WRITEABLE_CMD) { len = 2; if (len > maxlen) goto cleanup; *(p++) = 'r'; *(p++) = 'o'; maxlen -= 2; } /* print ',' separator if there are other partitions * following */ if (dev->num_parts > part_cnt) { if (1 > maxlen) goto cleanup; *(p++) = ','; maxlen--; } prev_part = part; } /* print ';' separator if there are other devices following */ if (dentry->next != &devices) { if (1 > maxlen) goto cleanup; *(p++) = ';'; maxlen--; } } /* we still have at least one char left, as we decremented maxlen at * the begining */ *p = '\0'; return 0; cleanup: last_parts[0] = '\0'; return 1; } /** * Call generate_mtdparts to process all devices and generate corresponding * mtdparts string, save it in mtdparts environment variable. * * @param buf output buffer holding generated mtdparts string (output) * @param buflen buffer size * @return 0 on success, 1 otherwise */ static int generate_mtdparts_save(char *buf, u32 buflen) { int ret; ret = generate_mtdparts(buf, buflen); if ((buf[0] != '\0') && (ret == 0)) setenv("mtdparts", buf); else setenv("mtdparts", NULL); return ret; } /** * Format and print out a partition list for each device from global device * list. */ static void list_partitions(void) { struct list_head *dentry, *pentry; struct part_info *part; struct mtd_device *dev; int part_num; DEBUGF("\n---list_partitions---\n"); list_for_each(dentry, &devices) { dev = list_entry(dentry, struct mtd_device, link); printf("\ndevice %s%d <%s>, # parts = %d\n", MTD_DEV_TYPE(dev->id->type), dev->id->num, dev->id->mtd_id, dev->num_parts); printf(" #: name\t\t\tsize\t\toffset\t\tmask_flags\n"); /* list partitions for given device */ part_num = 0; list_for_each(pentry, &dev->parts) { part = list_entry(pentry, struct part_info, link); printf("%2d: %-20s0x%08x\t0x%08x\t%d\n", part_num, part->name, part->size, part->offset, part->mask_flags); part_num++; } } if (list_empty(&devices)) printf("no partitions defined\n"); /* current_dev is not NULL only when we have non empty device list */ if (current_dev) { part = mtd_part_info(current_dev, current_partnum); if (part) { printf("\nactive partition: %s%d,%d - (%s) 0x%08x @ 0x%08x\n", MTD_DEV_TYPE(current_dev->id->type), current_dev->id->num, current_partnum, part->name, part->size, part->offset); } else { printf("could not get current partition info\n\n"); } } printf("\ndefaults:\n"); printf("mtdids : %s\n", mtdids_default); printf("mtdparts: %s\n", mtdparts_default); } /** * Given partition identifier in form of <dev_type><dev_num>,<part_num> find * corresponding device and verify partition number. * * @param id string describing device and partition or partition name * @param dev pointer to the requested device (output) * @param part_num verified partition number (output) * @param part pointer to requested partition (output) * @return 0 on success, 1 otherwise */ int find_dev_and_part(const char *id, struct mtd_device **dev, u8 *part_num, struct part_info **part) { struct list_head *dentry, *pentry; u8 type, dnum, pnum; const char *p; DEBUGF("--- find_dev_and_part ---\nid = %s\n", id); list_for_each(dentry, &devices) { *part_num = 0; *dev = list_entry(dentry, struct mtd_device, link); list_for_each(pentry, &(*dev)->parts) { *part = list_entry(pentry, struct part_info, link); if (strcmp((*part)->name, id) == 0) return 0; (*part_num)++; } } p = id; *dev = NULL; *part = NULL; *part_num = 0; if (mtd_id_parse(p, &p, &type, &dnum) != 0) return 1; if ((*p++ != ',') || (*p == '\0')) { printf("no partition number specified\n"); return 1; } pnum = simple_strtoul(p, (char **)&p, 0); if (*p != '\0') { printf("unexpected trailing character '%c'\n", *p); return 1; } if ((*dev = device_find(type, dnum)) == NULL) { printf("no such device %s%d\n", MTD_DEV_TYPE(type), dnum); return 1; } if ((*part = mtd_part_info(*dev, pnum)) == NULL) { printf("no such partition\n"); *dev = NULL; return 1; } *part_num = pnum; return 0; } /** * Find and delete partition. For partition id format see find_dev_and_part(). * * @param id string describing device and partition * @return 0 on success, 1 otherwise */ static int delete_partition(const char *id) { u8 pnum; struct mtd_device *dev; struct part_info *part; if (find_dev_and_part(id, &dev, &pnum, &part) == 0) { DEBUGF("delete_partition: device = %s%d, partition %d = (%s) 0x%08lx@0x%08lx\n", MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum, part->name, part->size, part->offset); if (part_del(dev, part) != 0) return 1; if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) { printf("generated mtdparts too long, reseting to null\n"); return 1; } return 0; } printf("partition %s not found\n", id); return 1; } /** * Accept character string describing mtd partitions and call device_parse() * for each entry. Add created devices to the global devices list. * * @param mtdparts string specifing mtd partitions * @return 0 on success, 1 otherwise */ static int parse_mtdparts(const char *const mtdparts) { const char *p = mtdparts; struct mtd_device *dev; int err = 1; DEBUGF("\n---parse_mtdparts---\nmtdparts = %s\n\n", p); /* delete all devices and partitions */ if (mtd_devices_init() != 0) { printf("could not initialise device list\n"); return err; } /* re-read 'mtdparts' variable, mtd_devices_init may be updating env */ p = getenv("mtdparts"); if (strncmp(p, "mtdparts=", 9) != 0) { printf("mtdparts variable doesn't start with 'mtdparts='\n"); return err; } p += 9; while (p && (*p != '\0')) { err = 1; if ((device_parse(p, &p, &dev) != 0) || (!dev)) break; DEBUGF("+ device: %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type), dev->id->num, dev->id->mtd_id); /* check if parsed device is already on the list */ if (device_find(dev->id->type, dev->id->num) != NULL) { printf("device %s%d redefined, please correct mtdparts variable\n", MTD_DEV_TYPE(dev->id->type), dev->id->num); break; } list_add_tail(&dev->link, &devices); err = 0; } if (err == 1) { device_delall(&devices); return 1; } return 0; } /** * Parse provided string describing mtdids mapping (see file header for mtdids * variable format). Allocate memory for each entry and add all found entries * to the global mtdids list. * * @param ids mapping string * @return 0 on success, 1 otherwise */ static int parse_mtdids(const char *const ids) { const char *p = ids; const char *mtd_id; int mtd_id_len; struct mtdids *id; struct list_head *entry, *n; struct mtdids *id_tmp; u8 type, num; u32 size; int ret = 1; DEBUGF("\n---parse_mtdids---\nmtdids = %s\n\n", ids); /* clean global mtdids list */ list_for_each_safe(entry, n, &mtdids) { id_tmp = list_entry(entry, struct mtdids, link); DEBUGF("mtdids del: %d %d\n", id_tmp->type, id_tmp->num); list_del(entry); free(id_tmp); } last_ids[0] = '\0'; INIT_LIST_HEAD(&mtdids); while(p && (*p != '\0')) { ret = 1; /* parse 'nor'|'nand'|'onenand'<dev-num> */ if (mtd_id_parse(p, &p, &type, &num) != 0) break; if (*p != '=') { printf("mtdids: incorrect <dev-num>\n"); break; } p++; /* check if requested device exists */ if (mtd_device_validate(type, num, &size) != 0) return 1; /* locate <mtd-id> */ mtd_id = p; if ((p = strchr(mtd_id, ',')) != NULL) { mtd_id_len = p - mtd_id + 1; p++; } else { mtd_id_len = strlen(mtd_id) + 1; } if (mtd_id_len == 0) { printf("mtdids: no <mtd-id> identifier\n"); break; } /* check if this id is already on the list */ int double_entry = 0; list_for_each(entry, &mtdids) { id_tmp = list_entry(entry, struct mtdids, link); if ((id_tmp->type == type) && (id_tmp->num == num)) { double_entry = 1; break; } } if (double_entry) { printf("device id %s%d redefined, please correct mtdids variable\n", MTD_DEV_TYPE(type), num); break; } /* allocate mtdids structure */ if (!(id = (struct mtdids *)malloc(sizeof(struct mtdids) + mtd_id_len))) { printf("out of memory\n"); break; } memset(id, 0, sizeof(struct mtdids) + mtd_id_len); id->num = num; id->type = type; id->size = size; id->mtd_id = (char *)(id + 1); strncpy(id->mtd_id, mtd_id, mtd_id_len - 1); id->mtd_id[mtd_id_len - 1] = '\0'; INIT_LIST_HEAD(&id->link); DEBUGF("+ id %s%d\t%16d bytes\t%s\n", MTD_DEV_TYPE(id->type), id->num, id->size, id->mtd_id); list_add_tail(&id->link, &mtdids); ret = 0; } if (ret == 1) { /* clean mtdids list and free allocated memory */ list_for_each_safe(entry, n, &mtdids) { id_tmp = list_entry(entry, struct mtdids, link); list_del(entry); free(id_tmp); } return 1; } return 0; } /** * Parse and initialize global mtdids mapping and create global * device/partition list. * * @return 0 on success, 1 otherwise */ int mtdparts_init(void) { static int initialized = 0; const char *ids, *parts; const char *current_partition; int ids_changed; char tmp_ep[PARTITION_MAXLEN]; DEBUGF("\n---mtdparts_init---\n"); if (!initialized) { INIT_LIST_HEAD(&mtdids); INIT_LIST_HEAD(&devices); memset(last_ids, 0, MTDIDS_MAXLEN); memset(last_parts, 0, MTDPARTS_MAXLEN); memset(last_partition, 0, PARTITION_MAXLEN); initialized = 1; } /* get variables */ ids = getenv("mtdids"); parts = getenv("mtdparts"); current_partition = getenv("partition"); /* save it for later parsing, cannot rely on current partition pointer * as 'partition' variable may be updated during init */ tmp_ep[0] = '\0'; if (current_partition) strncpy(tmp_ep, current_partition, PARTITION_MAXLEN); DEBUGF("last_ids : %s\n", last_ids); DEBUGF("env_ids : %s\n", ids); DEBUGF("last_parts: %s\n", last_parts); DEBUGF("env_parts : %s\n\n", parts); DEBUGF("last_partition : %s\n", last_partition); DEBUGF("env_partition : %s\n", current_partition); /* if mtdids varible is empty try to use defaults */ if (!ids) { if (mtdids_default) { DEBUGF("mtdids variable not defined, using default\n"); ids = mtdids_default; setenv("mtdids", (char *)ids); } else { printf("mtdids not defined, no default present\n"); return 1; } } if (strlen(ids) > MTDIDS_MAXLEN - 1) { printf("mtdids too long (> %d)\n", MTDIDS_MAXLEN); return 1; } /* do no try to use defaults when mtdparts variable is not defined, * just check the length */ if (!parts) printf("mtdparts variable not set, see 'help mtdparts'\n"); if (parts && (strlen(parts) > MTDPARTS_MAXLEN - 1)) { printf("mtdparts too long (> %d)\n", MTDPARTS_MAXLEN); return 1; } /* check if we have already parsed those mtdids */ if ((last_ids[0] != '\0') && (strcmp(last_ids, ids) == 0)) { ids_changed = 0; } else { ids_changed = 1; if (parse_mtdids(ids) != 0) { mtd_devices_init(); return 1; } /* ok it's good, save new ids */ strncpy(last_ids, ids, MTDIDS_MAXLEN); } /* parse partitions if either mtdparts or mtdids were updated */ if (parts && ((last_parts[0] == '\0') || ((strcmp(last_parts, parts) != 0)) || ids_changed)) { if (parse_mtdparts(parts) != 0) return 1; if (list_empty(&devices)) { printf("mtdparts_init: no valid partitions\n"); return 1; } /* ok it's good, save new parts */ strncpy(last_parts, parts, MTDPARTS_MAXLEN); /* reset first partition from first dev from the list as current */ current_dev = list_entry(devices.next, struct mtd_device, link); current_partnum = 0; current_save(); DEBUGF("mtdparts_init: current_dev = %s%d, current_partnum = %d\n", MTD_DEV_TYPE(current_dev->id->type), current_dev->id->num, current_partnum); } /* mtdparts variable was reset to NULL, delete all devices/partitions */ if (!parts && (last_parts[0] != '\0')) return mtd_devices_init(); /* do not process current partition if mtdparts variable is null */ if (!parts) return 0; /* is current partition set in environment? if so, use it */ if ((tmp_ep[0] != '\0') && (strcmp(tmp_ep, last_partition) != 0)) { struct part_info *p; struct mtd_device *cdev; u8 pnum; DEBUGF("--- getting current partition: %s\n", tmp_ep); if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) { current_dev = cdev; current_partnum = pnum; current_save(); } } else if (getenv("partition") == NULL) { DEBUGF("no partition variable set, setting...\n"); current_save(); } return 0; } /** * Return pointer to the partition of a requested number from a requested * device. * * @param dev device that is to be searched for a partition * @param part_num requested partition number * @return pointer to the part_info, NULL otherwise */ static struct part_info* mtd_part_info(struct mtd_device *dev, unsigned int part_num) { struct list_head *entry; struct part_info *part; int num; if (!dev) return NULL; DEBUGF("\n--- mtd_part_info: partition number %d for device %s%d (%s)\n", part_num, MTD_DEV_TYPE(dev->id->type), dev->id->num, dev->id->mtd_id); if (part_num >= dev->num_parts) { printf("invalid partition number %d for device %s%d (%s)\n", part_num, MTD_DEV_TYPE(dev->id->type), dev->id->num, dev->id->mtd_id); return NULL; } /* locate partition number, return it */ num = 0; list_for_each(entry, &dev->parts) { part = list_entry(entry, struct part_info, link); if (part_num == num++) { return part; } } return NULL; } /***************************************************/ /* U-boot commands */ /***************************************************/ /* command line only */ /** * Routine implementing u-boot chpart command. Sets new current partition based * on the user supplied partition id. For partition id format see find_dev_and_part(). * * @param cmdtp command internal data * @param flag command flag * @param argc number of arguments supplied to the command * @param argv arguments list * @return 0 on success, 1 otherwise */ int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { /* command line only */ struct mtd_device *dev; struct part_info *part; u8 pnum; if (mtdparts_init() !=0) return 1; if (argc < 2) { printf("no partition id specified\n"); return 1; } if (find_dev_and_part(argv[1], &dev, &pnum, &part) != 0) return 1; current_dev = dev; current_partnum = pnum; current_save(); printf("partition changed to %s%d,%d\n", MTD_DEV_TYPE(dev->id->type), dev->id->num, pnum); return 0; } /** * Routine implementing u-boot mtdparts command. Initialize/update default global * partition list and process user partition request (list, add, del). * * @param cmdtp command internal data * @param flag command flag * @param argc number of arguments supplied to the command * @param argv arguments list * @return 0 on success, 1 otherwise */ int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { if (argc == 2) { if (strcmp(argv[1], "default") == 0) { setenv("mtdids", (char *)mtdids_default); setenv("mtdparts", (char *)mtdparts_default); setenv("partition", NULL); mtdparts_init(); return 0; } else if (strcmp(argv[1], "delall") == 0) { /* this may be the first run, initialize lists if needed */ mtdparts_init(); setenv("mtdparts", NULL); /* mtd_devices_init() calls current_save() */ return mtd_devices_init(); } } /* make sure we are in sync with env variables */ if (mtdparts_init() != 0) return 1; if (argc == 1) { list_partitions(); return 0; } /* mtdparts add <mtd-dev> <size>[@<offset>] <name> [ro] */ if (((argc == 5) || (argc == 6)) && (strcmp(argv[1], "add") == 0)) { #define PART_ADD_DESC_MAXLEN 64 char tmpbuf[PART_ADD_DESC_MAXLEN]; u8 type, num, len; struct mtd_device *dev; struct mtd_device *dev_tmp; struct mtdids *id; struct part_info *p; if (mtd_id_parse(argv[2], NULL, &type, &num) != 0) return 1; if ((id = id_find(type, num)) == NULL) { printf("no such device %s defined in mtdids variable\n", argv[2]); return 1; } len = strlen(id->mtd_id) + 1; /* 'mtd_id:' */ len += strlen(argv[3]); /* size@offset */ len += strlen(argv[4]) + 2; /* '(' name ')' */ if (argv[5] && (strlen(argv[5]) == 2)) len += 2; /* 'ro' */ if (len >= PART_ADD_DESC_MAXLEN) { printf("too long partition description\n"); return 1; } sprintf(tmpbuf, "%s:%s(%s)%s", id->mtd_id, argv[3], argv[4], argv[5] ? argv[5] : ""); DEBUGF("add tmpbuf: %s\n", tmpbuf); if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev)) return 1; DEBUGF("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type), dev->id->num, dev->id->mtd_id); if ((dev_tmp = device_find(dev->id->type, dev->id->num)) == NULL) { device_add(dev); } else { /* merge new partition with existing ones*/ p = list_entry(dev->parts.next, struct part_info, link); if (part_add(dev_tmp, p) != 0) { device_del(dev); return 1; } } if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) { printf("generated mtdparts too long, reseting to null\n"); return 1; } return 0; } /* mtdparts del part-id */ if ((argc == 3) && (strcmp(argv[1], "del") == 0)) { DEBUGF("del: part-id = %s\n", argv[2]); return delete_partition(argv[2]); } cmd_usage(cmdtp); return 1; } /***************************************************/ U_BOOT_CMD( chpart, 2, 0, do_chpart, "change active partition", "part-id\n" " - change active partition (e.g. part-id = nand0,1)\n" ); U_BOOT_CMD( mtdparts, 6, 0, do_mtdparts, "define flash/nand partitions", "\n" " - list partition table\n" "mtdparts delall\n" " - delete all partitions\n" "mtdparts del part-id\n" " - delete partition (e.g. part-id = nand0,1)\n" "mtdparts add <mtd-dev> <size>[@<offset>] [<name>] [ro]\n" " - add partition\n" "mtdparts default\n" " - reset partition table to defaults\n\n" "-----\n\n" "this command uses three environment variables:\n\n" "'partition' - keeps current partition identifier\n\n" "partition := <part-id>\n" "<part-id> := <dev-id>,part_num\n\n" "'mtdids' - linux kernel mtd device id <-> u-boot device id mapping\n\n" "mtdids=<idmap>[,<idmap>,...]\n\n" "<idmap> := <dev-id>=<mtd-id>\n" "<dev-id> := 'nand'|'nor'|'onenand'<dev-num>\n" "<dev-num> := mtd device number, 0...\n" "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n\n" "'mtdparts' - partition list\n\n" "mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]\n\n" "<mtd-def> := <mtd-id>:<part-def>[,<part-def>...]\n" "<mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)\n" "<part-def> := <size>[@<offset>][<name>][<ro-flag>]\n" "<size> := standard linux memsize OR '-' to denote all remaining space\n" "<offset> := partition start offset within the device\n" "<name> := '(' NAME ')'\n" "<ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)\n" ); /***************************************************/