cmd/cramfs.c

   1 /*
   2  * SPDX-License-Identifier:     GPL-2.0+
   3  *
   4  * based on: cmd_jffs2.c
   5  *
   6  *      Add support for a CRAMFS located in RAM
   7  */
   8
   9
  10 /*
  11  * CRAMFS support
  12  */
  13 #include <common.h>
  14 #include <command.h>
  15 #include <malloc.h>
  16 #include <linux/list.h>
  17 #include <linux/ctype.h>
  18 #include <jffs2/jffs2.h>
  19 #include <jffs2/load_kernel.h>
  20 #include <cramfs/cramfs_fs.h>
  21
  22 /* enable/disable debugging messages */
  23 #define DEBUG_CRAMFS
  24 #undef  DEBUG_CRAMFS
  25
  26 #ifdef  DEBUG_CRAMFS
  27 # define DEBUGF(fmt, args...)   printf(fmt ,##args)
  28 #else
  29 # define DEBUGF(fmt, args...)
  30 #endif
  31
  32 #include <flash.h>
  33
  34 #ifndef CONFIG_MTD_NOR_FLASH
  35 # define OFFSET_ADJUSTMENT      0
  36 #else
  37 # define OFFSET_ADJUSTMENT      (flash_info[id.num].start[0])
  38 #endif
  39
  40 #ifndef CONFIG_CMD_JFFS2
  41 #include <linux/stat.h>
  42 char *mkmodestr(unsigned long mode, char *str)
  43 {
  44         static const char *l = "xwr";
  45         int mask = 1, i;
  46         char c;
  47
  48         switch (mode & S_IFMT) {
  49                 case S_IFDIR:    str[0] = 'd'; break;
  50                 case S_IFBLK:    str[0] = 'b'; break;
  51                 case S_IFCHR:    str[0] = 'c'; break;
  52                 case S_IFIFO:    str[0] = 'f'; break;
  53                 case S_IFLNK:    str[0] = 'l'; break;
  54                 case S_IFSOCK:   str[0] = 's'; break;
  55                 case S_IFREG:    str[0] = '-'; break;
  56                 default:         str[0] = '?';
  57         }
  58
  59         for(i = 0; i < 9; i++) {
  60                 c = l[i%3];
  61                 str[9-i] = (mode & mask)?c:'-';
  62                 mask = mask<<1;
  63         }
  64
  65         if(mode & S_ISUID) str[3] = (mode & S_IXUSR)?'s':'S';
  66         if(mode & S_ISGID) str[6] = (mode & S_IXGRP)?'s':'S';
  67         if(mode & S_ISVTX) str[9] = (mode & S_IXOTH)?'t':'T';
  68         str[10] = '\0';
  69         return str;
  70 }
  71 #endif /* CONFIG_CMD_JFFS2 */
  72
  73 extern int cramfs_check (struct part_info *info);
  74 extern int cramfs_load (char *loadoffset, struct part_info *info, char *filename);
  75 extern int cramfs_ls (struct part_info *info, char *filename);
  76 extern int cramfs_info (struct part_info *info);
  77
  78 /***************************************************/
  79 /* U-Boot commands                                 */
  80 /***************************************************/
  81
  82 /**
  83  * Routine implementing fsload u-boot command. This routine tries to load
  84  * a requested file from cramfs filesystem at location 'cramfsaddr'.
  85  * cramfsaddr is an evironment variable.
  86  *
  87  * @param cmdtp command internal data
  88  * @param flag command flag
  89  * @param argc number of arguments supplied to the command
  90  * @param argv arguments list
  91  * @return 0 on success, 1 otherwise
  92  */
  93 int do_cramfs_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  94 {
  95         char *filename;
  96         int size;
  97         ulong offset = load_addr;
  98
  99         struct part_info part;
 100         struct mtd_device dev;
 101         struct mtdids id;
 102
 103         ulong addr;
 104         addr = simple_strtoul(getenv("cramfsaddr"), NULL, 16);
 105
 106         /* hack! */
 107         /* cramfs_* only supports NOR flash chips */
 108         /* fake the device type */
 109         id.type = MTD_DEV_TYPE_NOR;
 110         id.num = 0;
 111         dev.id = &id;
 112         part.dev = &dev;
 113         /* fake the address offset */
 114         part.offset = addr - OFFSET_ADJUSTMENT;
 115
 116         /* pre-set Boot file name */
 117         if ((filename = getenv("bootfile")) == NULL) {
 118                 filename = "uImage";
 119         }
 120
 121         if (argc == 2) {
 122                 filename = argv[1];
 123         }
 124         if (argc == 3) {
 125                 offset = simple_strtoul(argv[1], NULL, 0);
 126                 load_addr = offset;
 127                 filename = argv[2];
 128         }
 129
 130         size = 0;
 131         if (cramfs_check(&part))
 132                 size = cramfs_load ((char *) offset, &part, filename);
 133
 134         if (size > 0) {
 135                 printf("### CRAMFS load complete: %d bytes loaded to 0x%lx\n",
 136                         size, offset);
 137                 setenv_hex("filesize", size);
 138         } else {
 139                 printf("### CRAMFS LOAD ERROR<%x> for %s!\n", size, filename);
 140         }
 141
 142         return !(size > 0);
 143 }
 144
 145 /**
 146  * Routine implementing u-boot ls command which lists content of a given
 147  * directory at location 'cramfsaddr'.
 148  * cramfsaddr is an evironment variable.
 149  *
 150  * @param cmdtp command internal data
 151  * @param flag command flag
 152  * @param argc number of arguments supplied to the command
 153  * @param argv arguments list
 154  * @return 0 on success, 1 otherwise
 155  */
 156 int do_cramfs_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 157 {
 158         char *filename = "/";
 159         int ret;
 160         struct part_info part;
 161         struct mtd_device dev;
 162         struct mtdids id;
 163
 164         ulong addr;
 165         addr = simple_strtoul(getenv("cramfsaddr"), NULL, 16);
 166
 167         /* hack! */
 168         /* cramfs_* only supports NOR flash chips */
 169         /* fake the device type */
 170         id.type = MTD_DEV_TYPE_NOR;
 171         id.num = 0;
 172         dev.id = &id;
 173         part.dev = &dev;
 174         /* fake the address offset */
 175         part.offset = addr - OFFSET_ADJUSTMENT;
 176
 177         if (argc == 2)
 178                 filename = argv[1];
 179
 180         ret = 0;
 181         if (cramfs_check(&part))
 182                 ret = cramfs_ls (&part, filename);
 183
 184         return ret ? 0 : 1;
 185 }
 186
 187 /* command line only */
 188
 189 /***************************************************/
 190 U_BOOT_CMD(
 191         cramfsload,     3,      0,      do_cramfs_load,
 192         "load binary file from a filesystem image",
 193         "[ off ] [ filename ]\n"
 194         "    - load binary file from address 'cramfsaddr'\n"
 195         "      with offset 'off'\n"
 196 );
 197 U_BOOT_CMD(
 198         cramfsls,       2,      1,      do_cramfs_ls,
 199         "list files in a directory (default /)",
 200         "[ directory ]\n"
 201         "    - list files in a directory.\n"
 202 );