2018-05-07 06:58:06 +09:00
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// SPDX-License-Identifier: GPL-2.0+
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2015-04-27 14:42:05 +09:00
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/*
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* (C) Copyright 2014
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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*/
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#include <common.h>
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#include <linux/mtd/mtd.h>
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2018-09-29 19:58:26 +09:00
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#include <jffs2/jffs2.h> /* Legacy */
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/**
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* mtd_search_alternate_name - Search an alternate name for @mtdname thanks to
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* the mtdids legacy environment variable.
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*
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* The mtdids string is a list of comma-separated 'dev_id=mtd_id' tupples.
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* Check if one of the mtd_id matches mtdname, in this case save dev_id in
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* altname.
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*
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* @mtdname: Current MTD device name
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* @altname: Alternate name to return
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* @max_len: Length of the alternate name buffer
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*
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* @return 0 on success, an error otherwise.
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*/
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int mtd_search_alternate_name(const char *mtdname, char *altname,
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unsigned int max_len)
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{
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const char *mtdids, *equal, *comma, *dev_id, *mtd_id;
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int dev_id_len, mtd_id_len;
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mtdids = env_get("mtdids");
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if (!mtdids)
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return -EINVAL;
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do {
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/* Find the '=' sign */
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dev_id = mtdids;
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equal = strchr(dev_id, '=');
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if (!equal)
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break;
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dev_id_len = equal - mtdids;
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mtd_id = equal + 1;
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/* Find the end of the tupple */
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comma = strchr(mtdids, ',');
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if (comma)
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mtd_id_len = comma - mtd_id;
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else
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mtd_id_len = &mtdids[strlen(mtdids)] - mtd_id + 1;
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if (!dev_id_len || !mtd_id_len)
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return -EINVAL;
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if (dev_id_len + 1 > max_len)
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continue;
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/* Compare the name we search with the current mtd_id */
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if (!strncmp(mtdname, mtd_id, mtd_id_len)) {
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strncpy(altname, dev_id, dev_id_len);
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altname[dev_id_len] = 0;
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return 0;
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}
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/* Go to the next tupple */
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mtdids = comma + 1;
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} while (comma);
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return -EINVAL;
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}
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/* Legacy */
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2015-04-27 14:42:05 +09:00
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static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
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loff_t *maxsize, int devtype)
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{
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#ifdef CONFIG_CMD_MTDPARTS
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struct mtd_device *dev;
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struct part_info *part;
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u8 pnum;
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int ret;
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ret = mtdparts_init();
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if (ret)
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return ret;
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ret = find_dev_and_part(partname, &dev, &pnum, &part);
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if (ret)
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return ret;
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if (dev->id->type != devtype) {
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printf("not same typ %d != %d\n", dev->id->type, devtype);
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return -1;
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}
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*off = part->offset;
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*size = part->size;
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*maxsize = part->size;
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*idx = dev->id->num;
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return 0;
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#else
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2015-10-15 21:34:09 +09:00
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puts("mtdparts support missing.\n");
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2015-04-27 14:42:05 +09:00
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return -1;
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#endif
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}
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int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
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2015-07-01 21:35:49 +09:00
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loff_t *maxsize, int devtype, uint64_t chipsize)
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2015-04-27 14:42:05 +09:00
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{
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if (!str2off(arg, off))
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return get_part(arg, idx, off, size, maxsize, devtype);
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if (*off >= chipsize) {
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puts("Offset exceeds device limit\n");
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return -1;
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}
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*maxsize = chipsize - *off;
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*size = *maxsize;
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return 0;
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}
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int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
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2015-07-01 21:35:49 +09:00
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loff_t *size, loff_t *maxsize, int devtype,
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uint64_t chipsize)
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2015-04-27 14:42:05 +09:00
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{
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int ret;
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if (argc == 0) {
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*off = 0;
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*size = chipsize;
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*maxsize = *size;
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goto print;
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}
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ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
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chipsize);
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if (ret)
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return ret;
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if (argc == 1)
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goto print;
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if (!str2off(argv[1], size)) {
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printf("'%s' is not a number\n", argv[1]);
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return -1;
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}
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if (*size > *maxsize) {
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puts("Size exceeds partition or device limit\n");
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return -1;
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}
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print:
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printf("device %d ", *idx);
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if (*size == chipsize)
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puts("whole chip\n");
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else
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printf("offset 0x%llx, size 0x%llx\n",
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(unsigned long long)*off, (unsigned long long)*size);
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return 0;
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}
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