/*
* (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
DECLARE_GLOBAL_DATA_PTR;
/* 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() */
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 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)
{
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;
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
*/
static 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;
const char *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;
}
#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];
u32 size, offset, 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%08x\t0x%08x\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%08x @ 0x%08x\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%08x@0x%08x\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;
u32 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%16d bytes\t%s\n",
MTD_DEV_TYPE(id->type), id->num,
id->size, id->mtd_id);
list_add_tail(&id->link, &mtdids);
ret = 0;
}
if (ret == 1) {
/* clean mtdids list and free allocated memory */
list_for_each_safe(entry, n, &mtdids) {
id_tmp = list_entry(entry, struct mtdids, link);
list_del(entry);
free(id_tmp);
}
return 1;
}
return 0;
}
/**
* Parse and initialize global mtdids mapping and create global
* device/partition list.
*
* @return 0 on success, 1 otherwise
*/
int mtdparts_init(void)
{
static int initialized = 0;
const char *ids, *parts;
const char *current_partition;
int ids_changed;
char tmp_ep[PARTITION_MAXLEN];
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
);
/***************************************************/
