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Diffstat (limited to 'cmd/mtdparts.c')
| -rw-r--r-- | cmd/mtdparts.c | 2106 |
1 files changed, 2106 insertions, 0 deletions
diff --git a/cmd/mtdparts.c b/cmd/mtdparts.c new file mode 100644 index 0000000000..dab195841a --- /dev/null +++ b/cmd/mtdparts.c @@ -0,0 +1,2106 @@ +/* + * (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. + * + * (C) Copyright 2008 + * Harald Welte, OpenMoko, Inc., Harald Welte <laforge@openmoko.org> + * + * $Id: cmdlinepart.c,v 1.17 2004/11/26 11:18:47 lavinen Exp $ + * Copyright 2002 SYSGO Real-Time Solutions GmbH + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +/* + * 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) + * + */ + +#include <common.h> +#include <command.h> +#include <malloc.h> +#include <jffs2/load_kernel.h> +#include <linux/list.h> +#include <linux/ctype.h> +#include <linux/err.h> +#include <linux/mtd/mtd.h> + +#if defined(CONFIG_CMD_NAND) +#include <linux/mtd/nand.h> +#include <nand.h> +#endif + +#if defined(CONFIG_CMD_ONENAND) +#include <linux/mtd/onenand.h> +#include <onenand_uboot.h> +#endif + +DECLARE_GLOBAL_DATA_PTR; + +/* special size referring to all the remaining space in a partition */ +#define SIZE_REMAINING (~0llu) + +/* 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 (~0llu) + +/* 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 +static const char *const mtdids_default = NULL; +#endif + +#if defined(MTDPARTS_DEFAULT) +static const char *const mtdparts_default = MTDPARTS_DEFAULT; +#else +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() */ +static struct list_head mtdids; + +/* device/partition list, parse_cmdline() parses into here */ +static struct list_head devices; + +/* current active device and partition number */ +struct mtd_device *current_mtd_dev = NULL; +u8 current_mtd_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 u64 memsize_parse (const char *const ptr, const char **retptr) +{ + u64 ret = simple_strtoull(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, u64 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, "%llug", size/SIZE_GB); + else if ((size % SIZE_MB) == 0) + sprintf(buf, "%llum", size/SIZE_MB); + else if (size % SIZE_KB == 0) + sprintf(buf, "%lluk", size/SIZE_KB); + else + sprintf(buf, "%llu", 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) +{ + u16 mtddevnum; + struct part_info *part; + struct list_head *dentry; + struct mtd_device *dev; + + debug("--- index partitions ---\n"); + + if (current_mtd_dev) { + mtddevnum = 0; + list_for_each(dentry, &devices) { + dev = list_entry(dentry, struct mtd_device, link); + if (dev == current_mtd_dev) { + mtddevnum += current_mtd_partnum; + setenv_ulong("mtddevnum", mtddevnum); + break; + } + mtddevnum += dev->num_parts; + } + + part = mtd_part_info(current_mtd_dev, current_mtd_partnum); + setenv("mtddevname", part->name); + + debug("=> mtddevnum %d,\n=> mtddevname %s\n", mtddevnum, part->name); + } else { + setenv("mtddevnum", NULL); + setenv("mtddevname", NULL); + + debug("=> mtddevnum NULL\n=> mtddevname NULL\n"); + } +} + +/** + * Save current device and partition in environment variable 'partition'. + */ +static void current_save(void) +{ + char buf[16]; + + debug("--- current_save ---\n"); + + if (current_mtd_dev) { + sprintf(buf, "%s%d,%d", MTD_DEV_TYPE(current_mtd_dev->id->type), + current_mtd_dev->id->num, current_mtd_partnum); + + setenv("partition", buf); + strncpy(last_partition, buf, 16); + + debug("=> partition %s\n", buf); + } else { + setenv("partition", NULL); + last_partition[0] = '\0'; + + debug("=> partition NULL\n"); + } + index_partitions(); +} + + +/** + * Produce a mtd_info given a type and num. + * + * @param type mtd type + * @param num mtd number + * @param mtd a pointer to an mtd_info instance (output) + * @return 0 if device is valid, 1 otherwise + */ +static int get_mtd_info(u8 type, u8 num, struct mtd_info **mtd) +{ + char mtd_dev[16]; + + sprintf(mtd_dev, "%s%d", MTD_DEV_TYPE(type), num); + *mtd = get_mtd_device_nm(mtd_dev); + if (IS_ERR(*mtd)) { + printf("Device %s not found!\n", mtd_dev); + return 1; + } + put_mtd_device(*mtd); + + return 0; +} + +/** + * Performs sanity check for supplied flash partition. + * Table of existing MTD 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_eraseblock(struct mtdids *id, struct part_info *part) +{ + struct mtd_info *mtd = NULL; + int i, j; + ulong start; + u64 offset, size; + + if (get_mtd_info(id->type, id->num, &mtd)) + return 1; + + part->sector_size = mtd->erasesize; + + if (!mtd->numeraseregions) { + /* + * Only one eraseregion (NAND, OneNAND or uniform NOR), + * checking for alignment is easy here + */ + offset = part->offset; + if (do_div(offset, mtd->erasesize)) { + printf("%s%d: partition (%s) start offset" + "alignment incorrect\n", + MTD_DEV_TYPE(id->type), id->num, part->name); + return 1; + } + + size = part->size; + if (do_div(size, mtd->erasesize)) { + printf("%s%d: partition (%s) size alignment incorrect\n", + MTD_DEV_TYPE(id->type), id->num, part->name); + return 1; + } + } else { + /* + * Multiple eraseregions (non-uniform NOR), + * checking for alignment is more complex here + */ + + /* Check start alignment */ + for (i = 0; i < mtd->numeraseregions; i++) { + start = mtd->eraseregions[i].offset; + for (j = 0; j < mtd->eraseregions[i].numblocks; j++) { + if (part->offset == start) + goto start_ok; + start += mtd->eraseregions[i].erasesize; + } + } + + printf("%s%d: partition (%s) start offset alignment incorrect\n", + MTD_DEV_TYPE(id->type), id->num, part->name); + return 1; + + start_ok: + + /* Check end/size alignment */ + for (i = 0; i < mtd->numeraseregions; i++) { + start = mtd->eraseregions[i].offset; + for (j = 0; j < mtd->eraseregions[i].numblocks; j++) { + if ((part->offset + part->size) == start) + goto end_ok; + start += mtd->eraseregions[i].erasesize; + } + } + /* Check last sector alignment */ + if ((part->offset + part->size) == start) + goto end_ok; + + printf("%s%d: partition (%s) size alignment incorrect\n", + MTD_DEV_TYPE(id->type), id->num, part->name); + return 1; + + end_ok: + return 0; + } + + return 0; +} + + +/** + * Performs sanity check for supplied partition. Offset and size are + * verified to be within valid range. Partition type is checked and + * part_validate_eraseblock() 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 %08llx beyond flash size %08llx\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; + } + + /* + * Now we need to check if the partition starts and ends on + * sector (eraseblock) regions + */ + return part_validate_eraseblock(id, part); +} + +/** + * Delete selected partition from the partition 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_mtd_dev) { + /* we are modyfing partitions for the current device, + * update current */ + struct part_info *curr_pi; + curr_pi = mtd_part_info(current_mtd_dev, current_mtd_partnum); + + if (curr_pi) { + if (curr_pi == part) { + printf("current partition deleted, resetting current to 0\n"); + current_mtd_partnum = 0; + } else if (part->offset <= curr_pi->offset) { + current_mtd_partnum--; + } + current_save_needed = 1; + } + } + + 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); + + 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)) { + debug("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_mtd_dev) + curr_pi = mtd_part_info(current_mtd_dev, current_mtd_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_mtd_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; + u64 size; + u64 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 */ + debug("'-': remaining size assigned\n"); + size = SIZE_REMAINING; + p++; + } else { + size = memsize_parse(p, &p); + if (size < MIN_PART_SIZE) { + printf("partition size too small (%llx)\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%08llx@0x%08llx", size, offset); + part->auto_name = 1; + } + + part->name[name_len - 1] = '\0'; + INIT_LIST_HEAD(&part->link); + + debug("+ partition: name %-22s size 0x%08llx offset 0x%08llx 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 type mtd type + * @param num mtd number + * @param size a pointer to the size of the mtd device (output) + * @return 0 if device is valid, 1 otherwise + */ +static int mtd_device_validate(u8 type, u8 num, u64 *size) +{ + struct mtd_info *mtd = NULL; + + if (get_mtd_info(type, num, &mtd)) + return 1; + + *size = mtd->size; + + return 0; +} + +/** + * 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_mtd_dev) { + /* we just deleted current device */ + if (list_empty(&devices)) { + current_mtd_dev = NULL; + } else { + /* reset first partition from first dev from the + * devices list as current */ + current_mtd_dev = list_entry(devices.next, struct mtd_device, link); + current_mtd_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 + */ +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_mtd_dev = dev; + current_mtd_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; + const char *pend; + LIST_HEAD(tmp_list); + struct list_head *entry, *n; + u16 num_parts; + u64 offset; + int err = 1; + + debug("===device_parse===\n"); + + assert(retdev); + *retdev = NULL; + + if (ret) + *ret = NULL; + + /* fetch <mtd-id> */ + mtd_id = p = mtd_dev; + 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; + } + +#ifdef DEBUG + pend = strchr(p, ';'); +#endif + debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n", + id->type, MTD_DEV_TYPE(id->type), + id->num, id->mtd_id); + debug("parsing partitions %.*s\n", (int)(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; + } + + debug("\ntotal partitions: %d\n", num_parts); + + /* check for next device presence */ + if (p) { + if (*p == ';') { + if (ret) + *ret = ++p; + } else if (*p == '\0') { + if (ret) + *ret = p; + } else { + printf("unexpected character '%c' at the end of device\n", *p); + if (ret) + *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; + + debug("===\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_mtd_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; + + debug("--- 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); + + debug("entry: '%s' (len = %zu)\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]; + u64 size, offset; + u32 len, part_cnt; + u32 maxlen = buflen - 1; + + debug("--- generate_mtdparts ---\n"); + + if (list_empty(&devices)) { + buf[0] = '\0'; + return 0; + } + + strcpy(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; +} + +#if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) +/** + * Get the net size (w/o bad blocks) of the given partition. + * + * @param mtd the mtd info + * @param part the partition + * @return the calculated net size of this partition + */ +static uint64_t net_part_size(struct mtd_info *mtd, struct part_info *part) +{ + uint64_t i, net_size = 0; + + if (!mtd->block_isbad) + return part->size; + + for (i = 0; i < part->size; i += mtd->erasesize) { + if (!mtd->block_isbad(mtd, part->offset + i)) + net_size += mtd->erasesize; + } + + return net_size; +} +#endif + +static void print_partition_table(void) +{ + struct list_head *dentry, *pentry; + struct part_info *part; + struct mtd_device *dev; + int part_num; + + list_for_each(dentry, &devices) { + dev = list_entry(dentry, struct mtd_device, link); + /* list partitions for given device */ + part_num = 0; +#if defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) + struct mtd_info *mtd; + + if (get_mtd_info(dev->id->type, dev->id->num, &mtd)) + return; + + 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\tsize\t\tnet size\toffset\t\tmask_flags\n"); + + list_for_each(pentry, &dev->parts) { + u32 net_size; + char *size_note; + + part = list_entry(pentry, struct part_info, link); + net_size = net_part_size(mtd, part); + size_note = part->size == net_size ? " " : " (!)"; + printf("%2d: %-20s0x%08x\t0x%08x%s\t0x%08x\t%d\n", + part_num, part->name, part->size, + net_size, size_note, part->offset, + part->mask_flags); +#else /* !defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */ + 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\tsize\t\toffset\t\tmask_flags\n"); + + list_for_each(pentry, &dev->parts) { + part = list_entry(pentry, struct part_info, link); + printf("%2d: %-20s0x%08llx\t0x%08llx\t%d\n", + part_num, part->name, part->size, + part->offset, part->mask_flags); +#endif /* defined(CONFIG_CMD_MTDPARTS_SHOW_NET_SIZES) */ + part_num++; + } + } + + if (list_empty(&devices)) + printf("no partitions defined\n"); +} + +/** + * Format and print out a partition list for each device from global device + * list. + */ +static void list_partitions(void) +{ + struct part_info *part; + + debug("\n---list_partitions---\n"); + print_partition_table(); + + /* current_mtd_dev is not NULL only when we have non empty device list */ + if (current_mtd_dev) { + part = mtd_part_info(current_mtd_dev, current_mtd_partnum); + if (part) { + printf("\nactive partition: %s%d,%d - (%s) 0x%08llx @ 0x%08llx\n", + MTD_DEV_TYPE(current_mtd_dev->id->type), + current_mtd_dev->id->num, current_mtd_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 ? mtdids_default : "none"); + /* + * Using printf() here results in printbuffer overflow + * if default mtdparts string is greater than console + * printbuffer. Use puts() to prevent system crashes. + */ + puts("mtdparts: "); + puts(mtdparts_default ? mtdparts_default : "none"); + puts("\n"); +} + +/** + * 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; + + debug("--- 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) { + + debug("delete_partition: device = %s%d, partition %d = (%s) 0x%08llx@0x%08llx\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, resetting to null\n"); + return 1; + } + return 0; + } + + printf("partition %s not found\n", id); + return 1; +} + +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) +/** + * Increase the size of the given partition so that it's net size is at least + * as large as the size member and such that the next partition would start on a + * good block if it were adjacent to this partition. + * + * @param mtd the mtd device + * @param part the partition + * @param next_offset pointer to the offset of the next partition after this + * partition's size has been modified (output) + */ +static void spread_partition(struct mtd_info *mtd, struct part_info *part, + uint64_t *next_offset) +{ + uint64_t net_size, padding_size = 0; + int truncated; + + mtd_get_len_incl_bad(mtd, part->offset, part->size, &net_size, + &truncated); + + /* + * Absorb bad blocks immediately following this + * partition also into the partition, such that + * the next partition starts with a good block. + */ + if (!truncated) { + mtd_get_len_incl_bad(mtd, part->offset + net_size, + mtd->erasesize, &padding_size, &truncated); + if (truncated) + padding_size = 0; + else + padding_size -= mtd->erasesize; + } + + if (truncated) { + printf("truncated partition %s to %lld bytes\n", part->name, + (uint64_t) net_size + padding_size); + } + + part->size = net_size + padding_size; + *next_offset = part->offset + part->size; +} + +/** + * Adjust all of the partition sizes, such that all partitions are at least + * as big as their mtdparts environment variable sizes and they each start + * on a good block. + * + * @return 0 on success, 1 otherwise + */ +static int spread_partitions(void) +{ + struct list_head *dentry, *pentry; + struct mtd_device *dev; + struct part_info *part; + struct mtd_info *mtd; + int part_num; + uint64_t cur_offs; + + list_for_each(dentry, &devices) { + dev = list_entry(dentry, struct mtd_device, link); + + if (get_mtd_info(dev->id->type, dev->id->num, &mtd)) + return 1; + + part_num = 0; + cur_offs = 0; + list_for_each(pentry, &dev->parts) { + part = list_entry(pentry, struct part_info, link); + + debug("spread_partitions: device = %s%d, partition %d =" + " (%s) 0x%08x@0x%08x\n", + MTD_DEV_TYPE(dev->id->type), dev->id->num, + part_num, part->name, part->size, + part->offset); + + if (cur_offs > part->offset) + part->offset = cur_offs; + + spread_partition(mtd, part, &cur_offs); + + part_num++; + } + } + + index_partitions(); + + if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) { + printf("generated mtdparts too long, resetting to null\n"); + return 1; + } + return 0; +} +#endif /* CONFIG_CMD_MTDPARTS_SPREAD */ + +/** + * 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; + char tmp_parts[MTDPARTS_MAXLEN]; + + debug("\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 */ + if (gd->flags & GD_FLG_ENV_READY) { + p = getenv("mtdparts"); + } else { + p = tmp_parts; + getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN); + } + + 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; + + debug("+ 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; + u64 size; + int ret = 1; + + debug("\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); + debug("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); + + debug("+ id %s%d\t%16lld 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]; + char tmp_parts[MTDPARTS_MAXLEN]; + + debug("\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"); + /* + * The mtdparts variable tends to be long. If we need to access it + * before the env is relocated, then we need to use our own stack + * buffer. gd->env_buf will be too small. + */ + if (gd->flags & GD_FLG_ENV_READY) { + parts = getenv("mtdparts"); + } else { + parts = tmp_parts; + getenv_f("mtdparts", tmp_parts, MTDPARTS_MAXLEN); + } + 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); + + debug("last_ids : %s\n", last_ids); + debug("env_ids : %s\n", ids); + debug("last_parts: %s\n", last_parts); + debug("env_parts : %s\n\n", parts); + + debug("last_partition : %s\n", last_partition); + debug("env_partition : %s\n", current_partition); + + /* if mtdids varible is empty try to use defaults */ + if (!ids) { + if (mtdids_default) { + debug("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_mtd_dev = list_entry(devices.next, struct mtd_device, link); + current_mtd_partnum = 0; + current_save(); + + debug("mtdparts_init: current_mtd_dev = %s%d, current_mtd_partnum = %d\n", + MTD_DEV_TYPE(current_mtd_dev->id->type), + current_mtd_dev->id->num, current_mtd_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; + + debug("--- getting current partition: %s\n", tmp_ep); + + if (find_dev_and_part(tmp_ep, &cdev, &pnum, &p) == 0) { + current_mtd_dev = cdev; + current_mtd_partnum = pnum; + current_save(); + } + } else if (getenv("partition") == NULL) { + debug("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; + + debug("\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 + */ +static int do_chpart(cmd_tbl_t *cmdtp, int flag, int argc, char * const 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_mtd_dev = dev; + current_mtd_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 + */ +static int do_mtdparts(cmd_tbl_t *cmdtp, int flag, int argc, + char * const 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)) && (strncmp(argv[1], "add", 3) == 0)) { +#define PART_ADD_DESC_MAXLEN 64 + char tmpbuf[PART_ADD_DESC_MAXLEN]; +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) + struct mtd_info *mtd; + uint64_t next_offset; +#endif + 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] : ""); + debug("add tmpbuf: %s\n", tmpbuf); + + if ((device_parse(tmpbuf, NULL, &dev) != 0) || (!dev)) + return 1; + + debug("+ %s\t%d\t%s\n", MTD_DEV_TYPE(dev->id->type), + dev->id->num, dev->id->mtd_id); + + p = list_entry(dev->parts.next, struct part_info, link); + +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) + if (get_mtd_info(dev->id->type, dev->id->num, &mtd)) + return 1; + + if (!strcmp(&argv[1][3], ".spread")) { + spread_partition(mtd, p, &next_offset); + debug("increased %s to %d bytes\n", p->name, p->size); + } +#endif + + dev_tmp = device_find(dev->id->type, dev->id->num); + if (dev_tmp == NULL) { + device_add(dev); + } else if (part_add(dev_tmp, p) != 0) { + /* merge new partition with existing ones*/ + device_del(dev); + return 1; + } + + if (generate_mtdparts_save(last_parts, MTDPARTS_MAXLEN) != 0) { + printf("generated mtdparts too long, resetting to null\n"); + return 1; + } + + return 0; + } + + /* mtdparts del part-id */ + if ((argc == 3) && (strcmp(argv[1], "del") == 0)) { + debug("del: part-id = %s\n", argv[2]); + + return delete_partition(argv[2]); + } + +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) + if ((argc == 2) && (strcmp(argv[1], "spread") == 0)) + return spread_partitions(); +#endif /* CONFIG_CMD_MTDPARTS_SPREAD */ + + return CMD_RET_USAGE; +} + +/***************************************************/ +U_BOOT_CMD( + chpart, 2, 0, do_chpart, + "change active partition", + "part-id\n" + " - change active partition (e.g. part-id = nand0,1)" +); + +#ifdef CONFIG_SYS_LONGHELP +static char mtdparts_help_text[] = + "\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" +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) + "mtdparts add.spread <mtd-dev> <size>[@<offset>] [<name>] [ro]\n" + " - add partition, padding size by skipping bad blocks\n" +#endif + "mtdparts default\n" + " - reset partition table to defaults\n" +#if defined(CONFIG_CMD_MTDPARTS_SPREAD) + "mtdparts spread\n" + " - adjust the sizes of the partitions so they are\n" + " at least as big as the mtdparts variable specifies\n" + " and they each start on a good block\n\n" +#else + "\n" +#endif /* CONFIG_CMD_MTDPARTS_SPREAD */ + "-----\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)"; +#endif + +U_BOOT_CMD( + mtdparts, 6, 0, do_mtdparts, + "define flash/nand partitions", mtdparts_help_text +); +/***************************************************/ |
