common/cmd_fdos.c

   1 /*
   2  * (C) Copyright 2002
   3  * Stäubli Faverges - <www.staubli.com>
   4  * Pierre AUBERT  p.aubert@staubli.com
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 /*
  26  * Dos floppy support
  27  */
  28
  29 #include <common.h>
  30 #include <config.h>
  31 #include <command.h>
  32 #include <fdc.h>
  33
  34 /*-----------------------------------------------------------------------------
  35  * do_fdosboot --
  36  *-----------------------------------------------------------------------------
  37  */
  38 int do_fdosboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  39 {
  40     char *name;
  41     char *ep;
  42     int size;
  43     int rcode = 0;
  44     char buf [12];
  45     int drive = CONFIG_SYS_FDC_DRIVE_NUMBER;
  46
  47     /* pre-set load_addr */
  48     if ((ep = getenv("loadaddr")) != NULL) {
  49         load_addr = simple_strtoul(ep, NULL, 16);
  50     }
  51
  52     /* pre-set Boot file name */
  53     if ((name = getenv("bootfile")) == NULL) {
  54         name = "uImage";
  55     }
  56
  57     switch (argc) {
  58     case 1:
  59         break;
  60     case 2:
  61         /* only one arg - accept two forms:
  62          * just load address, or just boot file name.
  63          * The latter form must be written "filename" here.
  64          */
  65         if (argv[1][0] == '"') {        /* just boot filename */
  66             name = argv [1];
  67         } else {                        /* load address */
  68             load_addr = simple_strtoul(argv[1], NULL, 16);
  69         }
  70         break;
  71     case 3:
  72         load_addr = simple_strtoul(argv[1], NULL, 16);
  73         name = argv [2];
  74         break;
  75     default:
  76         return cmd_usage(cmdtp);
  77     }
  78
  79     /* Init physical layer                                                   */
  80     if (!fdc_fdos_init (drive)) {
  81         return (-1);
  82     }
  83
  84     /* Open file                                                             */
  85     if (dos_open (name) < 0) {
  86         printf ("Unable to open %s\n", name);
  87         return 1;
  88     }
  89     if ((size = dos_read (load_addr)) < 0) {
  90         printf ("boot error\n");
  91         return 1;
  92     }
  93     flush_cache (load_addr, size);
  94
  95     sprintf(buf, "%x", size);
  96     setenv("filesize", buf);
  97
  98     printf("Floppy DOS load complete: %d bytes loaded to 0x%lx\n",
  99            size, load_addr);
 100
 101     /* Check if we should attempt an auto-start */
 102     if (((ep = getenv("autostart")) != NULL) && (strcmp(ep,"yes") == 0)) {
 103         char *local_args[2];
 104         extern int do_bootm (cmd_tbl_t *, int, int, char *[]);
 105         local_args[0] = argv[0];
 106         local_args[1] = NULL;
 107         printf ("Automatic boot of image at addr 0x%08lX ...\n", load_addr);
 108         rcode = do_bootm (cmdtp, 0, 1, local_args);
 109     }
 110     return rcode;
 111 }
 112
 113 /*-----------------------------------------------------------------------------
 114  * do_fdosls --
 115  *-----------------------------------------------------------------------------
 116  */
 117 int do_fdosls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 118 {
 119     char *path = "";
 120     int drive = CONFIG_SYS_FDC_DRIVE_NUMBER;
 121
 122     switch (argc) {
 123     case 1:
 124         break;
 125     case 2:
 126         path = argv [1];
 127         break;
 128     }
 129
 130     /* Init physical layer                                                   */
 131     if (!fdc_fdos_init (drive)) {
 132         return (-1);
 133     }
 134     /* Open directory                                                        */
 135     if (dos_open (path) < 0) {
 136         printf ("Unable to open %s\n", path);
 137         return 1;
 138     }
 139     return (dos_dir ());
 140 }
 141
 142 U_BOOT_CMD(
 143         fdosboot,       3,      0,      do_fdosboot,
 144         "boot from a dos floppy file",
 145         "[loadAddr] [filename]"
 146 );
 147
 148 U_BOOT_CMD(
 149         fdosls, 2,      0,      do_fdosls,
 150         "list files in a directory",
 151         "[directory]"
 152 );