LXR uboot/drivers/mtd/mtd

   1/*
   2 * (C) Copyright 2014
   3 * Heiko Schocher, DENX Software Engineering, hs@denx.de.
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7#include <common.h>
   8#include <linux/mtd/mtd.h>
   9#include <jffs2/jffs2.h>
  10
  11static int get_part(const char *partname, int *idx, loff_t *off, loff_t *size,
  12                loff_t *maxsize, int devtype)
  13{
  14#ifdef CONFIG_CMD_MTDPARTS
  15        struct mtd_device *dev;
  16        struct part_info *part;
  17        u8 pnum;
  18        int ret;
  19
  20        ret = mtdparts_init();
  21        if (ret)
  22                return ret;
  23
  24        ret = find_dev_and_part(partname, &dev, &pnum, &part);
  25        if (ret)
  26                return ret;
  27
  28        if (dev->id->type != devtype) {
  29                printf("not same typ %d != %d\n", dev->id->type, devtype);
  30                return -1;
  31        }
  32
  33        *off = part->offset;
  34        *size = part->size;
  35        *maxsize = part->size;
  36        *idx = dev->id->num;
  37
  38        return 0;
  39#else
  40        puts("mtdparts support missing.\n");
  41        return -1;
  42#endif
  43}
  44
  45int mtd_arg_off(const char *arg, int *idx, loff_t *off, loff_t *size,
  46                loff_t *maxsize, int devtype, uint64_t chipsize)
  47{
  48        if (!str2off(arg, off))
  49                return get_part(arg, idx, off, size, maxsize, devtype);
  50
  51        if (*off >= chipsize) {
  52                puts("Offset exceeds device limit\n");
  53                return -1;
  54        }
  55
  56        *maxsize = chipsize - *off;
  57        *size = *maxsize;
  58        return 0;
  59}
  60
  61int mtd_arg_off_size(int argc, char *const argv[], int *idx, loff_t *off,
  62                     loff_t *size, loff_t *maxsize, int devtype,
  63                     uint64_t chipsize)
  64{
  65        int ret;
  66
  67        if (argc == 0) {
  68                *off = 0;
  69                *size = chipsize;
  70                *maxsize = *size;
  71                goto print;
  72        }
  73
  74        ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
  75                          chipsize);
  76        if (ret)
  77                return ret;
  78
  79        if (argc == 1)
  80                goto print;
  81
  82        if (!str2off(argv[1], size)) {
  83                printf("'%s' is not a number\n", argv[1]);
  84                return -1;
  85        }
  86
  87        if (*size > *maxsize) {
  88                puts("Size exceeds partition or device limit\n");
  89                return -1;
  90        }
  91
  92print:
  93        printf("device %d ", *idx);
  94        if (*size == chipsize)
  95                puts("whole chip\n");
  96        else
  97                printf("offset 0x%llx, size 0x%llx\n",
  98                       (unsigned long long)*off, (unsigned long long)*size);
  99        return 0;
 100}
 101