board/cm5200/fwupdate.c

   1 /*
   2  * (C) Copyright 2007 Schindler Lift Inc.
   3  * (C) Copyright 2007 DENX Software Engineering
   4  *
   5  * Author: Michel Marti <mma@objectxp.com>
   6  * Adapted for U-Boot 1.2 by Piotr Kruszynski <ppk@semihalf.com>:
   7  *   - code clean-up
   8  *   - bugfix for overwriting bootargs by user
   9  *
  10  * See file CREDITS for list of people who contributed to this
  11  * project.
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License as
  15  * published by the Free Software Foundation; either version 2 of
  16  * the License, or (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, write to the Free Software
  25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  26  * MA 02111-1307 USA
  27  */
  28
  29 #include <common.h>
  30 #include <command.h>
  31 #include <malloc.h>
  32 #include <image.h>
  33 #include <usb.h>
  34 #include <fat.h>
  35
  36 #include "fwupdate.h"
  37
  38 extern long do_fat_read(const char *, void *, unsigned long, int);
  39 extern int do_fat_fsload(cmd_tbl_t *, int, int, char * const []);
  40
  41 static int load_rescue_image(ulong);
  42
  43 void cm5200_fwupdate(void)
  44 {
  45         cmd_tbl_t *bcmd;
  46         char *rsargs;
  47         char *tmp = NULL;
  48         char ka[16];
  49         char * const argv[3] = { "bootm", ka, NULL };
  50
  51         /* Check if rescue system is disabled... */
  52         if (getenv("norescue")) {
  53                 printf(LOG_PREFIX "Rescue System disabled.\n");
  54                 return;
  55         }
  56
  57         /* Check if we have a USB storage device and load image */
  58         if (load_rescue_image(LOAD_ADDR))
  59                 return;
  60
  61         bcmd = find_cmd("bootm");
  62         if (!bcmd)
  63                 return;
  64
  65         sprintf(ka, "%lx", (ulong)LOAD_ADDR);
  66
  67         /* prepare our bootargs */
  68         rsargs = getenv("rs-args");
  69         if (!rsargs)
  70                 rsargs = RS_BOOTARGS;
  71         else {
  72                 tmp = malloc(strlen(rsargs+1));
  73                 if (!tmp) {
  74                         printf(LOG_PREFIX "Memory allocation failed\n");
  75                         return;
  76                 }
  77                 strcpy(tmp, rsargs);
  78                 rsargs = tmp;
  79         }
  80
  81         setenv("bootargs", rsargs);
  82
  83         if (rsargs == tmp)
  84                 free(rsargs);
  85
  86         printf(LOG_PREFIX "Starting update system (bootargs=%s)...\n", rsargs);
  87         do_bootm(bcmd, 0, 2, argv);
  88 }
  89
  90 static int load_rescue_image(ulong addr)
  91 {
  92         disk_partition_t info;
  93         int devno;
  94         int partno;
  95         int i;
  96         char fwdir[64];
  97         char nxri[128];
  98         char *tmp;
  99         char dev[7];
 100         char addr_str[16];
 101         char * const argv[6] = { "fatload", "usb", dev, addr_str, nxri, NULL };
 102         block_dev_desc_t *stor_dev = NULL;
 103         cmd_tbl_t *bcmd;
 104
 105         /* Get name of firmware directory */
 106         tmp = getenv("fw-dir");
 107
 108         /* Copy it into fwdir */
 109         strncpy(fwdir, tmp ? tmp : FW_DIR, sizeof(fwdir));
 110         fwdir[sizeof(fwdir) - 1] = 0; /* Terminate string */
 111
 112         printf(LOG_PREFIX "Checking for firmware image directory '%s' on USB"
 113                 " storage...\n", fwdir);
 114         usb_stop();
 115         if (usb_init() != 0)
 116                 return 1;
 117
 118         /* Check for storage device */
 119         if (usb_stor_scan(1) != 0) {
 120                 usb_stop();
 121                 return 1;
 122         }
 123
 124         /* Detect storage device */
 125         for (devno = 0; devno < USB_MAX_STOR_DEV; devno++) {
 126                 stor_dev = usb_stor_get_dev(devno);
 127                 if (stor_dev->type != DEV_TYPE_UNKNOWN)
 128                         break;
 129         }
 130         if (!stor_dev || stor_dev->type == DEV_TYPE_UNKNOWN) {
 131                 printf(LOG_PREFIX "No valid storage device found...\n");
 132                 usb_stop();
 133                 return 1;
 134         }
 135
 136         /* Detect partition */
 137         for (partno = -1, i = 0; i < 6; i++) {
 138                 if (get_partition_info(stor_dev, i, &info) == 0) {
 139                         if (fat_register_device(stor_dev, i) == 0) {
 140                                 /* Check if rescue image is present */
 141                                 FW_DEBUG("Looking for firmware directory '%s'"
 142                                         " on partition %d\n", fwdir, i);
 143                                 if (do_fat_read(fwdir, NULL, 0, LS_NO) == -1) {
 144                                         FW_DEBUG("No NX rescue image on "
 145                                                 "partition %d.\n", i);
 146                                         partno = -2;
 147                                 } else {
 148                                         partno = i;
 149                                         FW_DEBUG("Partition %d contains "
 150                                                 "firmware directory\n", partno);
 151                                         break;
 152                                 }
 153                         }
 154                 }
 155         }
 156
 157         if (partno < 0) {
 158                 switch (partno) {
 159                 case -1:
 160                         printf(LOG_PREFIX "Error: No valid (FAT) partition "
 161                                 "detected\n");
 162                         break;
 163                 case -2:
 164                         printf(LOG_PREFIX "Error: No NX rescue image on FAT "
 165                                 "partition\n");
 166                         break;
 167                 default:
 168                         printf(LOG_PREFIX "Error: Failed with code %d\n",
 169                                 partno);
 170                 }
 171                 usb_stop();
 172                 return 1;
 173         }
 174
 175         /* Load the rescue image */
 176         bcmd = find_cmd("fatload");
 177         if (!bcmd) {
 178                 printf(LOG_PREFIX "Error - 'fatload' command not present.\n");
 179                 usb_stop();
 180                 return 1;
 181         }
 182
 183         tmp = getenv("nx-rescue-image");
 184         sprintf(nxri, "%s/%s", fwdir, tmp ? tmp : RESCUE_IMAGE);
 185         sprintf(dev, "%d:%d", devno, partno);
 186         sprintf(addr_str, "%lx", addr);
 187
 188         FW_DEBUG("fat_fsload device='%s', addr='%s', file: %s\n",
 189                 dev, addr_str, nxri);
 190
 191         if (do_fat_fsload(bcmd, 0, 5, argv) != 0) {
 192                 usb_stop();
 193                 return 1;
 194         }
 195
 196         /* Stop USB */
 197         usb_stop();
 198         return 0;
 199 }