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cmd_mtdparts.c
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/*
* (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
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Three environment variables are used by the parsing routines:
*
* 'partition' - keeps current partition identifier
*
* partition := <part-id>
* <part-id> := <dev-id>,part_num
*
*
* 'mtdids' - linux kernel mtd device id <-> u-boot device id mapping
*
* mtdids=<idmap>[,<idmap>,...]
*
* <idmap> := <dev-id>=<mtd-id>
* <dev-id> := 'nand'|'nor'|'onenand'<dev-num>
* <dev-num> := mtd device number, 0...
* <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
*
*
* 'mtdparts' - partition list
*
* mtdparts=mtdparts=<mtd-def>[;<mtd-def>...]
*
* <mtd-def> := <mtd-id>:<part-def>[,<part-def>...]
* <mtd-id> := unique device tag used by linux kernel to find mtd device (mtd->name)
* <part-def> := <size>[@<offset>][<name>][<ro-flag>]
* <size> := standard linux memsize OR '-' to denote all remaining space
* <offset> := partition start offset within the device
* <name> := '(' NAME ')'
* <ro-flag> := when set to 'ro' makes partition read-only (not used, passed to kernel)
*
* Notes:
* - each <mtd-id> used in mtdparts must albo exist in 'mtddis' mapping
* - if the above variables are not set defaults for a given target are used
*
* Examples:
*
* 1 NOR Flash, with 1 single writable partition:
* mtdids=nor0=edb7312-nor
* mtdparts=mtdparts=edb7312-nor:-
*
* 1 NOR Flash with 2 partitions, 1 NAND with one
* mtdids=nor0=edb7312-nor,nand0=edb7312-nand
* mtdparts=mtdparts=edb7312-nor:256k(ARMboot)ro,-(root);edb7312-nand:-(home)
*
*/
#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
/* special size referring to all the remaining space in a partition */
#define SIZE_REMAINING 0xFFFFFFFF
/* special offset value, it is used when not provided by user
*
* this value is used temporarily during parsing, later such offests
* are recalculated */
#define OFFSET_NOT_SPECIFIED 0xFFFFFFFF
/* minimum partition size */
#define MIN_PART_SIZE 4096
/* this flag needs to be set in part_info struct mask_flags
* field for read-only partitions */
#define MTD_WRITEABLE_CMD 1
/* default values for mtdids and mtdparts variables */
#if defined(MTDIDS_DEFAULT)
static const char *const mtdids_default = MTDIDS_DEFAULT;
#else
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() */
struct list_head mtdids;
/* device/partition list, parse_cmdline() parses into here */
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 unsigned long memsize_parse (const char *const ptr, const char **retptr)
{
unsigned long ret = simple_strtoul(ptr, (char **)retptr, 0);
switch (**retptr) {
case 'G':
case 'g':
ret <<= 10;
case 'M':
case 'm':
ret <<= 10;
case 'K':
case 'k':
ret <<= 10;
(*retptr)++;
default:
break;
}
return ret;
}
/**
* Format string describing supplied size. This routine does the opposite job
* to memsize_parse(). Size in bytes is converted to string and if possible
* shortened by using k (kilobytes), m (megabytes) or g (gigabytes) suffix.
*
* Note, that this routine does not check for buffer overflow, it's the caller
* who must assure enough space.
*
* @param buf output buffer
* @param size size to be converted to string
*/
static void memsize_format(char *buf, u32 size)
{
#define SIZE_GB ((u32)1024*1024*1024)
#define SIZE_MB ((u32)1024*1024)
#define SIZE_KB ((u32)1024)
if ((size % SIZE_GB) == 0)
sprintf(buf, "%ug", size/SIZE_GB);
else if ((size % SIZE_MB) == 0)
sprintf(buf, "%um", size/SIZE_MB);
else if (size % SIZE_KB == 0)
sprintf(buf, "%uk", size/SIZE_KB);
else
sprintf(buf, "%u", size);
}
/**
* This routine does global indexing of all partitions. Resulting index for
* current partition is saved in 'mtddevnum'. Current partition name in
* 'mtddevname'.
*/
static void index_partitions(void)
{
char buf[16];
u16 mtddevnum;
struct part_info *part;
struct list_head *dentry;
struct mtd_device *dev;
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;
sprintf(buf, "%d", mtddevnum);
setenv("mtddevnum", buf);
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;
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
*/
if ((unsigned long)part->offset % mtd->erasesize) {
printf("%s%d: partition (%s) start offset"
"alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
return 1;
}
if (part->size % mtd->erasesize) {
printf("%s%d: partition (%s) size alignment incorrect\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
return 1;
}
} 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 either
* parts_validate_nor() or parts_validate_nand() is called with the argument
* of part.
*
* @param id of the parent device
* @param part partition to validate
* @return 0 if partition is valid, 1 otherwise
*/
static int part_validate(struct mtdids *id, struct part_info *part)
{
if (part->size == SIZE_REMAINING)
part->size = id->size - part->offset;
if (part->offset > id->size) {
printf("%s: offset %08x beyond flash size %08x\n",
id->mtd_id, part->offset, id->size);
return 1;
}
if ((part->offset + part->size) <= part->offset) {
printf("%s%d: partition (%s) size too big\n",
MTD_DEV_TYPE(id->type), id->num, part->name);
return 1;
}
if (part->offset + part->size > id->size) {
printf("%s: partitioning exceeds flash size\n", id->mtd_id);
return 1;
}
/*
* 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 partion list of the specified device.
*
* @param dev device to delete partition from
* @param part partition to delete
* @return 0 on success, 1 otherwise
*/
static int part_del(struct mtd_device *dev, struct part_info *part)
{
u8 current_save_needed = 0;
/* if there is only one partition, remove whole device */
if (dev->num_parts == 1)
return device_del(dev);
/* otherwise just delete this partition */
if (dev == current_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;
unsigned long size;
unsigned long offset;
const char *name;
int name_len;
unsigned int mask_flags;
const char *p;
p = partdef;
*retpart = NULL;
*ret = NULL;
/* fetch the partition size */
if (*p == '-') {
/* assign all remaining space to this partition */
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 (%lx)\n", size);
return 1;
}
}
/* check for offset */
offset = OFFSET_NOT_SPECIFIED;
if (*p == '@') {
p++;
offset = memsize_parse(p, &p);
}
/* now look for the name */
if (*p == '(') {
name = ++p;
if ((p = strchr(name, ')')) == NULL) {
printf("no closing ) found in partition name\n");
return 1;
}
name_len = p - name + 1;
if ((name_len - 1) == 0) {
printf("empty partition name\n");
return 1;
}
p++;
} else {
/* 0x00000000@0x00000000 */
name_len = 22;
name = NULL;
}
/* test for options */
mask_flags = 0;
if (strncmp(p, "ro", 2) == 0) {
mask_flags |= MTD_WRITEABLE_CMD;
p += 2;
}
/* check for next partition definition */
if (*p == ',') {
if (size == SIZE_REMAINING) {
*ret = NULL;
printf("no partitions allowed after a fill-up partition\n");
return 1;
}
*ret = ++p;
} else if ((*p == ';') || (*p == '\0')) {
*ret = p;
} else {
printf("unexpected character '%c' at the end of partition\n", *p);
*ret = NULL;
return 1;
}
/* allocate memory */
part = (struct part_info *)malloc(sizeof(struct part_info) + name_len);
if (!part) {
printf("out of memory\n");
return 1;
}
memset(part, 0, sizeof(struct part_info) + name_len);
part->size = size;
part->offset = offset;
part->mask_flags = mask_flags;
part->name = (char *)(part + 1);
if (name) {
/* copy user provided name */
strncpy(part->name, name, name_len - 1);
part->auto_name = 0;
} else {
/* auto generated name in form of size@offset */
sprintf(part->name, "0x%08lx@0x%08lx", size, offset);
part->auto_name = 1;
}
part->name[name_len - 1] = '\0';
INIT_LIST_HEAD(&part->link);
debug("+ partition: name %-22s size 0x%08x offset 0x%08x mask flags %d\n",
part->name, part->size,
part->offset, part->mask_flags);
*retpart = part;
return 0;
}
/**
* Check device number to be within valid range for given device type.
*
* @param 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
*/
int mtd_device_validate(u8 type, u8 num, u32 *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, *pend;
LIST_HEAD(tmp_list);
struct list_head *entry, *n;
u16 num_parts;
u32 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;
}
debug("dev type = %d (%s), dev num = %d, mtd-id = %s\n",
id->type, MTD_DEV_TYPE(id->type),
id->num, id->mtd_id);
pend = strchr(p, ';');
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;
}
/**