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("offset is not a number\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, int 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, int chipsize)
  63 {
  64         int ret;
  65
  66         if (argc == 0) {
  67                 *off = 0;
  68                 *size = chipsize;
  69                 *maxsize = *size;
  70                 goto print;
  71         }
  72
  73         ret = mtd_arg_off(argv[0], idx, off, size, maxsize, devtype,
  74                           chipsize);
  75         if (ret)
  76                 return ret;
  77
  78         if (argc == 1)
  79                 goto print;
  80
  81         if (!str2off(argv[1], size)) {
  82                 printf("'%s' is not a number\n", argv[1]);
  83                 return -1;
  84         }
  85
  86         if (*size > *maxsize) {
  87                 puts("Size exceeds partition or device limit\n");
  88                 return -1;
  89         }
  90
  91 print:
  92         printf("device %d ", *idx);
  93         if (*size == chipsize)
  94                 puts("whole chip\n");
  95         else
  96                 printf("offset 0x%llx, size 0x%llx\n",
  97                        (unsigned long long)*off, (unsigned long long)*size);
  98         return 0;
  99 }