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 int do_bootm(cmd_tbl_t *, int, int, char *[]);
  39 extern long do_fat_read(const char *, void *, unsigned long, int);
  40 extern int do_fat_fsload(cmd_tbl_t *, int, int, char *[]);
  41
  42 static int load_rescue_image(ulong);
  43
  44 void cm5200_fwupdate(void)
  45 {
  46         cmd_tbl_t *bcmd;
  47         char *rsargs;
  48         char *tmp = NULL;
  49         char ka[16];
  50         char *argv[3] = { "bootm", ka, NULL };
  51
  52         /* Check if rescue system is disabled... */
  53         if (getenv("norescue")) {
  54                 printf(LOG_PREFIX "Rescue System disabled.\n");
  55                 return;
  56         }
  57
  58         /* Check if we have a USB storage device and load image */
  59         if (load_rescue_image(LOAD_ADDR))
  60                 return;
  61
  62         bcmd = find_cmd("bootm");
  63         if (!bcmd)
  64                 return;
  65
  66         sprintf(ka, "%lx", LOAD_ADDR);
  67
  68         /* prepare our bootargs */
  69         rsargs = getenv("rs-args");
  70         if (!rsargs)
  71                 rsargs = RS_BOOTARGS;
  72         else {
  73                 tmp = malloc(strlen(rsargs+1));
  74                 if (!tmp) {
  75                         printf(LOG_PREFIX "Memory allocation failed\n");
  76                         return;
  77                 }
  78                 strcpy(tmp, rsargs);
  79                 rsargs = tmp;
  80         }
  81
  82         setenv("bootargs", rsargs);
  83
  84         if (rsargs == tmp)
  85                 free(rsargs);
  86
  87         printf(LOG_PREFIX "Starting update system (bootargs=%s)...\n", rsargs);
  88         do_bootm(bcmd, 0, 2, argv);
  89 }
  90
  91 static int load_rescue_image(ulong addr)
  92 {
  93         disk_partition_t info;
  94         int devno;
  95         int partno;
  96         int i;
  97         char fwdir[64];
  98         char nxri[128];
  99         char *tmp;
 100         char dev[7];
 101         char addr_str[16];
 102         char *argv[6] = { "fatload", "usb", dev, addr_str, nxri, NULL };
 103         block_dev_desc_t *stor_dev = NULL;
 104         cmd_tbl_t *bcmd;
 105
 106         /* Get name of firmware directory */
 107         tmp = getenv("fw-dir");
 108
 109         /* Copy it into fwdir */
 110         strncpy(fwdir, tmp ? tmp : FW_DIR, sizeof(fwdir));
 111         fwdir[sizeof(fwdir) - 1] = 0; /* Terminate string */
 112
 113         printf(LOG_PREFIX "Checking for firmware image directory '%s' on USB"
 114                 " storage...\n", fwdir);
 115         usb_stop();
 116         if (usb_init() != 0)
 117                 return 1;
 118
 119         /* Check for storage device */
 120         if (usb_stor_scan(1) != 0) {
 121                 usb_stop();
 122                 return 1;
 123         }
 124
 125         /* Detect storage device */
 126         for (devno = 0; devno < USB_MAX_STOR_DEV; devno++) {
 127                 stor_dev = usb_stor_get_dev(devno);
 128                 if (stor_dev->type != DEV_TYPE_UNKNOWN)
 129                         break;
 130         }
 131         if (!stor_dev || stor_dev->type == DEV_TYPE_UNKNOWN) {
 132                 printf(LOG_PREFIX "No valid storage device found...\n");
 133                 usb_stop();
 134                 return 1;
 135         }
 136
 137         /* Detect partition */
 138         for (partno = -1, i = 0; i < 6; i++) {
 139                 if (get_partition_info(stor_dev, i, &info) == 0) {
 140                         if (fat_register_device(stor_dev, i) == 0) {
 141                                 /* Check if rescue image is present */
 142                                 FW_DEBUG("Looking for firmware directory '%s'"
 143                                         " on partition %d\n", fwdir, i);
 144                                 if (do_fat_read(fwdir, NULL, 0, LS_NO) == -1) {
 145                                         FW_DEBUG("No NX rescue image on "
 146                                                 "partition %d.\n", i);
 147                                         partno = -2;
 148                                 } else {
 149                                         partno = i;
 150                                         FW_DEBUG("Partition %d contains "
 151                                                 "firmware directory\n", partno);
 152                                         break;
 153                                 }
 154                         }
 155                 }
 156         }
 157
 158         if (partno < 0) {
 159                 switch (partno) {
 160                 case -1:
 161                         printf(LOG_PREFIX "Error: No valid (FAT) partition "
 162                                 "detected\n");
 163                         break;
 164                 case -2:
 165                         printf(LOG_PREFIX "Error: No NX rescue image on FAT "
 166                                 "partition\n");
 167                         break;
 168                 default:
 169                         printf(LOG_PREFIX "Error: Failed with code %d\n",
 170                                 partno);
 171                 }
 172                 usb_stop();
 173                 return 1;
 174         }
 175
 176         /* Load the rescue image */
 177         bcmd = find_cmd("fatload");
 178         if (!bcmd) {
 179                 printf(LOG_PREFIX "Error - 'fatload' command not present.\n");
 180                 usb_stop();
 181                 return 1;
 182         }
 183
 184         tmp = getenv("nx-rescue-image");
 185         sprintf(nxri, "%s/%s", fwdir, tmp ? tmp : RESCUE_IMAGE);
 186         sprintf(dev, "%d:%d", devno, partno);
 187         sprintf(addr_str, "%lx", addr);
 188
 189         FW_DEBUG("fat_fsload device='%s', addr='%s', file: %s\n",
 190                 dev, addr_str, nxri);
 191
 192         if (do_fat_fsload(bcmd, 0, 5, argv) != 0) {
 193                 usb_stop();
 194                 return 1;
 195         }
 196
 197         /* Stop USB */
 198         usb_stop();
 199         return 0;
 200 }