--- /dev/null
+/*
+ * (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;
+ }
+
+ 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", (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 = %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];
+ u64 size, offset;
+ u32 len, part_cnt;
+ u32 maxlen = buflen - 1;
+
+ debug("--- 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;
+}
+
+#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
+);
+/***************************************************/
Code Review / kvmfornfv.git / blobdiff