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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2014
* Heiko Schocher, DENX Software Engineering, hs@denx.de.
*/
#include <common.h>
#include <linux/mtd/mtd.h>
#include <jffs2/jffs2.h> /* Legacy */
/**
* mtd_search_alternate_name - Search an alternate name for @mtdname thanks to
* the mtdids legacy environment variable.
*
* The mtdids string is a list of comma-separated 'dev_id=mtd_id' tupples.
* Check if one of the mtd_id matches mtdname, in this case save dev_id in
* altname.
*
* @mtdname: Current MTD device name
* @altname: Alternate name to return
* @max_len: Length of the alternate name buffer
*
* @return 0 on success, an error otherwise.
*/
int mtd_search_alternate_name(const char *mtdname, char *altname,
unsigned int max_len)
{
const char *mtdids, *equal, *comma, *dev_id, *mtd_id;
int dev_id_len, mtd_id_len;
mtdids = env_get("mtdids");
if (!mtdids)
return -EINVAL;
do {
/* Find the '=' sign */
dev_id = mtdids;
equal = strchr(dev_id, '=');
if (!equal)
break;
dev_id_len = equal - mtdids;
mtd_id = equal + 1;
/* Find the end of the tupple */
comma = strchr(mtdids, ',');
if (comma)
mtd_id_len = comma - mtd_id;
else
mtd_id_len = &mtdids[strlen(mtdids)] - mtd_id + 1;
if (!dev_id_len || !mtd_id_len)
return -EINVAL;
if (dev_id_len + 1 > max_len)
continue;
/* Compare the name we search with the current mtd_id */
if (!strncmp(mtdname, mtd_id, mtd_id_len)) {
strncpy(altname, dev_id, dev_id_len);
altname[dev_id_len] = 0;
return 0;
}
/* Go to the next tupple */
mtdids = comma + 1;
} while (comma);
return -EINVAL;
}
/* Legacy */
static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
loff_t *maxsize, int devtype)
{
#ifdef CONFIG_CMD_MTDPARTS
struct mtd_device *dev;
struct part_info *part;
u8 pnum;
int ret;
ret = mtdparts_init();
if (ret)
return ret;
ret = find_dev_and_part(partname, &dev, &pnum, &part);
if (ret)
return ret;
if (dev->id->type != devtype) {
printf("not same typ %d != %d\n", dev->id->type, devtype);
return -1;
}
*off = part->offset;
*size = part->size;
*maxsize = part->size;
*idx = dev->id->num;
return 0;
#else
puts("mtdparts support missing.\n");
return -1;
#endif
}
int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
loff_t *maxsize, int devtype, uint64_t chipsize)
{
if (!str2off(arg, off))
return get_part(arg, idx, off, size, maxsize, devtype);
if (*off >= chipsize) {
puts("Offset exceeds device limit\n");
return -1;
}
*maxsize = chipsize - *off;
*size = *maxsize;
return 0;
}
int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
loff_t *size, loff_t *maxsize, int devtype,
uint64_t chipsize)
{
int ret;
if (argc == 0) {
*off = 0;
*size = chipsize;
*maxsize = *size;
goto print;
}
ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
chipsize);
if (ret)
return ret;
if (argc == 1)
goto print;
if (!str2off(argv[1], size)) {
printf("'%s' is not a number\n", argv[1]);
return -1;
}
if (*size > *maxsize) {
puts("Size exceeds partition or device limit\n");
return -1;
}
print:
printf("device %d ", *idx);
if (*size == chipsize)
puts("whole chip\n");
else
printf("offset 0x%llx, size 0x%llx\n",
(unsigned long long)*off, (unsigned long long)*size);
return 0;
}
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