drivers/mtd/mtd_uboot.c

   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
  11 static 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
  45 int 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
  61 int 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
  92 print:
  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 }