board/mcc200/auto_update.c

   1 /*
   2  * (C) Copyright 2006
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18  * MA 02111-1307 USA
  19  */
  20 #include <common.h>
  21 #include <command.h>
  22 #include <malloc.h>
  23 #include <image.h>
  24 #include <asm/byteorder.h>
  25 #include <usb.h>
  26 #include <part.h>
  27
  28 #ifdef CFG_HUSH_PARSER
  29 #include <hush.h>
  30 #endif
  31
  32
  33 #ifdef CONFIG_AUTO_UPDATE
  34
  35 #ifndef CONFIG_USB_OHCI
  36 #error "must define CONFIG_USB_OHCI"
  37 #endif
  38
  39 #ifndef CONFIG_USB_STORAGE
  40 #error "must define CONFIG_USB_STORAGE"
  41 #endif
  42
  43 #ifndef CFG_HUSH_PARSER
  44 #error "must define CFG_HUSH_PARSER"
  45 #endif
  46
  47 #if !defined(CONFIG_CMD_FAT)
  48 #error "must define CFG_CMD_FAT"
  49 #endif
  50
  51 #undef AU_DEBUG
  52
  53 #undef debug
  54 #ifdef  AU_DEBUG
  55 #define debug(fmt,args...)      printf (fmt ,##args)
  56 #else
  57 #define debug(fmt,args...)
  58 #endif  /* AU_DEBUG */
  59
  60 /* possible names of files on the USB stick. */
  61 #define AU_FIRMWARE     "u-boot.img"
  62 #define AU_KERNEL       "kernel.img"
  63 #define AU_ROOTFS       "rootfs.img"
  64
  65 struct flash_layout {
  66         long start;
  67         long end;
  68 };
  69
  70 /* layout of the FLASH. ST = start address, ND = end address. */
  71 #define AU_FL_FIRMWARE_ST       0xfC000000
  72 #define AU_FL_FIRMWARE_ND       0xfC03FFFF
  73 #define AU_FL_KERNEL_ST         0xfC0C0000
  74 #define AU_FL_KERNEL_ND         0xfC1BFFFF
  75 #define AU_FL_ROOTFS_ST         0xFC1C0000
  76 #define AU_FL_ROOTFS_ND         0xFCFBFFFF
  77
  78 static int au_usb_stor_curr_dev; /* current device */
  79
  80 /* index of each file in the following arrays */
  81 #define IDX_FIRMWARE    0
  82 #define IDX_KERNEL      1
  83 #define IDX_ROOTFS      2
  84
  85 /* max. number of files which could interest us */
  86 #define AU_MAXFILES 3
  87
  88 /* pointers to file names */
  89 char *aufile[AU_MAXFILES] = {
  90         AU_FIRMWARE,
  91         AU_KERNEL,
  92         AU_ROOTFS
  93 };
  94
  95 /* sizes of flash areas for each file */
  96 long ausize[AU_MAXFILES] = {
  97         (AU_FL_FIRMWARE_ND + 1) - AU_FL_FIRMWARE_ST,
  98         (AU_FL_KERNEL_ND   + 1) - AU_FL_KERNEL_ST,
  99         (AU_FL_ROOTFS_ND   + 1) - AU_FL_ROOTFS_ST,
 100 };
 101
 102 /* array of flash areas start and end addresses */
 103 struct flash_layout aufl_layout[AU_MAXFILES] = {
 104         { AU_FL_FIRMWARE_ST,    AU_FL_FIRMWARE_ND, },
 105         { AU_FL_KERNEL_ST,      AU_FL_KERNEL_ND,   },
 106         { AU_FL_ROOTFS_ST,      AU_FL_ROOTFS_ND,   },
 107 };
 108
 109 ulong totsize;
 110
 111 /* where to load files into memory */
 112 #define LOAD_ADDR ((unsigned char *)0x00200000)
 113
 114 /* the root file system is the largest image */
 115 #define MAX_LOADSZ ausize[IDX_ROOTFS]
 116
 117 /*i2c address of the keypad status*/
 118 #define I2C_PSOC_KEYPAD_ADDR    0x53
 119
 120 /* keypad mask */
 121 #define KEYPAD_ROW      2
 122 #define KEYPAD_COL      2
 123 #define KEYPAD_MASK_LO  ((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))&0xFF)
 124 #define KEYPAD_MASK_HI  ((1<<(KEYPAD_COL-1+(KEYPAD_ROW*3-3)))>>8)
 125
 126 /* externals */
 127 extern int fat_register_device(block_dev_desc_t *, int);
 128 extern int file_fat_detectfs(void);
 129 extern long file_fat_read(const char *, void *, unsigned long);
 130 extern int i2c_read (unsigned char, unsigned int, int , unsigned char* , int);
 131 extern int flash_sect_erase(ulong, ulong);
 132 extern int flash_sect_protect (int, ulong, ulong);
 133 extern int flash_write (char *, ulong, ulong);
 134 extern int u_boot_hush_start(void);
 135 #ifdef CONFIG_PROGRESSBAR
 136 extern void show_progress(int, int);
 137 extern void lcd_puts (char *);
 138 extern void lcd_enable(void);
 139 #endif
 140
 141 int au_check_cksum_valid(int idx, long nbytes)
 142 {
 143         image_header_t *hdr;
 144         unsigned long checksum;
 145
 146         hdr = (image_header_t *)LOAD_ADDR;
 147
 148         if (nbytes != (sizeof(*hdr) + ntohl(hdr->ih_size))) {
 149                 printf ("Image %s bad total SIZE\n", aufile[idx]);
 150                 return -1;
 151         }
 152         /* check the data CRC */
 153         checksum = ntohl(hdr->ih_dcrc);
 154
 155         if (crc32 (0, (uchar *)(LOAD_ADDR + sizeof(*hdr)), ntohl(hdr->ih_size)) != checksum) {
 156                 printf ("Image %s bad data checksum\n", aufile[idx]);
 157                 return -1;
 158         }
 159         return 0;
 160 }
 161
 162 int au_check_header_valid(int idx, long nbytes)
 163 {
 164         image_header_t *hdr;
 165         unsigned long checksum, fsize;
 166
 167         hdr = (image_header_t *)LOAD_ADDR;
 168         /* check the easy ones first */
 169 #undef CHECK_VALID_DEBUG
 170 #ifdef CHECK_VALID_DEBUG
 171         printf("magic %#x %#x ", ntohl(hdr->ih_magic), IH_MAGIC);
 172         printf("arch %#x %#x ", hdr->ih_arch, IH_CPU_ARM);
 173         printf("size %#x %#lx ", ntohl(hdr->ih_size), nbytes);
 174         printf("type %#x %#x ", hdr->ih_type, IH_TYPE_KERNEL);
 175 #endif
 176         if (nbytes < sizeof(*hdr)) {
 177                 printf ("Image %s bad header SIZE\n", aufile[idx]);
 178                 ausize[idx] = 0;
 179                 return -1;
 180         }
 181         if (ntohl(hdr->ih_magic) != IH_MAGIC || hdr->ih_arch != IH_CPU_PPC) {
 182                 printf ("Image %s bad MAGIC or ARCH\n", aufile[idx]);
 183                 ausize[idx] = 0;
 184                 return -1;
 185         }
 186         /* check the hdr CRC */
 187         checksum = ntohl(hdr->ih_hcrc);
 188         hdr->ih_hcrc = 0;
 189
 190         if (crc32 (0, (uchar *)hdr, sizeof(*hdr)) != checksum) {
 191                 printf ("Image %s bad header checksum\n", aufile[idx]);
 192                 ausize[idx] = 0;
 193                 return -1;
 194         }
 195         hdr->ih_hcrc = htonl(checksum);
 196         /* check the type - could do this all in one gigantic if() */
 197         if ((idx == IDX_FIRMWARE) && (hdr->ih_type != IH_TYPE_FIRMWARE)) {
 198                 printf ("Image %s wrong type\n", aufile[idx]);
 199                 ausize[idx] = 0;
 200                 return -1;
 201         }
 202         if ((idx == IDX_KERNEL) && (hdr->ih_type != IH_TYPE_KERNEL)) {
 203                 printf ("Image %s wrong type\n", aufile[idx]);
 204                 ausize[idx] = 0;
 205                 return -1;
 206         }
 207         if ((idx == IDX_ROOTFS) &&
 208                 ( (hdr->ih_type != IH_TYPE_RAMDISK) && (hdr->ih_type != IH_TYPE_FILESYSTEM) )
 209            ) {
 210                 printf ("Image %s wrong type\n", aufile[idx]);
 211                 ausize[idx] = 0;
 212                 return -1;
 213         }
 214         /* recycle checksum */
 215         checksum = ntohl(hdr->ih_size);
 216
 217         fsize = checksum + sizeof(*hdr);
 218         /* for kernel and ramdisk the image header must also fit into flash */
 219         if (idx == IDX_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK)
 220                 checksum += sizeof(*hdr);
 221
 222         /* check the size does not exceed space in flash. HUSH scripts */
 223         if ((ausize[idx] != 0) && (ausize[idx] < checksum)) {
 224                 printf ("Image %s is bigger than FLASH\n", aufile[idx]);
 225                 ausize[idx] = 0;
 226                 return -1;
 227         }
 228         /* Update with the real filesize */
 229         ausize[idx] = fsize;
 230
 231         return checksum; /* return size to be written to flash */
 232 }
 233
 234 int au_do_update(int idx, long sz)
 235 {
 236         image_header_t *hdr;
 237         char *addr;
 238         long start, end;
 239         int off, rc;
 240         uint nbytes;
 241
 242         hdr = (image_header_t *)LOAD_ADDR;
 243
 244         /* execute a script */
 245         if (hdr->ih_type == IH_TYPE_SCRIPT) {
 246                 addr = (char *)((char *)hdr + sizeof(*hdr));
 247                 /* stick a NULL at the end of the script, otherwise */
 248                 /* parse_string_outer() runs off the end. */
 249                 addr[ntohl(hdr->ih_size)] = 0;
 250                 addr += 8;
 251                 parse_string_outer(addr, FLAG_PARSE_SEMICOLON);
 252                 return 0;
 253         }
 254
 255         start = aufl_layout[idx].start;
 256         end = aufl_layout[idx].end;
 257
 258         /* unprotect the address range */
 259         /* this assumes that ONLY the firmware is protected! */
 260         if (idx == IDX_FIRMWARE) {
 261 #undef AU_UPDATE_TEST
 262 #ifdef AU_UPDATE_TEST
 263                 /* erase it where Linux goes */
 264                 start = aufl_layout[1].start;
 265                 end = aufl_layout[1].end;
 266 #endif
 267                 flash_sect_protect(0, start, end);
 268         }
 269
 270         /*
 271          * erase the address range.
 272          */
 273         debug ("flash_sect_erase(%lx, %lx);\n", start, end);
 274         flash_sect_erase(start, end);
 275         wait_ms(100);
 276 #ifdef CONFIG_PROGRESSBAR
 277         show_progress(end - start, totsize);
 278 #endif
 279
 280         /* strip the header - except for the kernel and ramdisk */
 281         if (hdr->ih_type == IH_TYPE_KERNEL || hdr->ih_type == IH_TYPE_RAMDISK) {
 282                 addr = (char *)hdr;
 283                 off = sizeof(*hdr);
 284                 nbytes = sizeof(*hdr) + ntohl(hdr->ih_size);
 285         } else {
 286                 addr = (char *)((char *)hdr + sizeof(*hdr));
 287 #ifdef AU_UPDATE_TEST
 288                 /* copy it to where Linux goes */
 289                 if (idx == IDX_FIRMWARE)
 290                         start = aufl_layout[1].start;
 291 #endif
 292                 off = 0;
 293                 nbytes = ntohl(hdr->ih_size);
 294         }
 295
 296         /* copy the data from RAM to FLASH */
 297         debug ("flash_write(%p, %lx %x)\n", addr, start, nbytes);
 298         rc = flash_write(addr, start, nbytes);
 299         if (rc != 0) {
 300                 printf("Flashing failed due to error %d\n", rc);
 301                 return -1;
 302         }
 303
 304 #ifdef CONFIG_PROGRESSBAR
 305         show_progress(nbytes, totsize);
 306 #endif
 307
 308         /* check the data CRC of the copy */
 309         if (crc32 (0, (uchar *)(start + off), ntohl(hdr->ih_size)) != ntohl(hdr->ih_dcrc)) {
 310                 printf ("Image %s Bad Data Checksum after COPY\n", aufile[idx]);
 311                 return -1;
 312         }
 313
 314         /* protect the address range */
 315         /* this assumes that ONLY the firmware is protected! */
 316         if (idx == IDX_FIRMWARE)
 317                 flash_sect_protect(1, start, end);
 318         return 0;
 319 }
 320
 321 /*
 322  * this is called from board_init() after the hardware has been set up
 323  * and is usable. That seems like a good time to do this.
 324  * Right now the return value is ignored.
 325  */
 326 int do_auto_update(void)
 327 {
 328         block_dev_desc_t *stor_dev;
 329         long sz;
 330         int i, res = 0, bitmap_first, cnt, old_ctrlc, got_ctrlc;
 331         char *env;
 332         long start, end;
 333         uchar keypad_status1[2] = {0,0}, keypad_status2[2] = {0,0};
 334
 335         /*
 336          * Read keypad status
 337          */
 338         i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status1, 2);
 339         wait_ms(500);
 340         i2c_read(I2C_PSOC_KEYPAD_ADDR, 0, 0, keypad_status2, 2);
 341
 342         /*
 343          * Check keypad
 344          */
 345         if ( !(keypad_status1[1] & KEYPAD_MASK_LO) ||
 346               (keypad_status1[1] != keypad_status2[1])) {
 347                 return 0;
 348         }
 349
 350         au_usb_stor_curr_dev = -1;
 351         /* start USB */
 352         if (usb_stop() < 0) {
 353                 debug ("usb_stop failed\n");
 354                 return -1;
 355         }
 356         if (usb_init() < 0) {
 357                 debug ("usb_init failed\n");
 358                 return -1;
 359         }
 360         /*
 361          * check whether a storage device is attached (assume that it's
 362          * a USB memory stick, since nothing else should be attached).
 363          */
 364         au_usb_stor_curr_dev = usb_stor_scan(0);
 365         if (au_usb_stor_curr_dev == -1) {
 366                 debug ("No device found. Not initialized?\n");
 367                 return -1;
 368         }
 369         /* check whether it has a partition table */
 370         stor_dev = get_dev("usb", 0);
 371         if (stor_dev == NULL) {
 372                 debug ("uknown device type\n");
 373                 return -1;
 374         }
 375         if (fat_register_device(stor_dev, 1) != 0) {
 376                 debug ("Unable to use USB %d:%d for fatls\n",
 377                         au_usb_stor_curr_dev, 1);
 378                 return -1;
 379         }
 380         if (file_fat_detectfs() != 0) {
 381                 debug ("file_fat_detectfs failed\n");
 382         }
 383
 384         /*
 385          * now check whether start and end are defined using environment
 386          * variables.
 387          */
 388         start = -1;
 389         end = 0;
 390         env = getenv("firmware_st");
 391         if (env != NULL)
 392                 start = simple_strtoul(env, NULL, 16);
 393         env = getenv("firmware_nd");
 394         if (env != NULL)
 395                 end = simple_strtoul(env, NULL, 16);
 396         if (start >= 0 && end && end > start) {
 397                 ausize[IDX_FIRMWARE] = (end + 1) - start;
 398                 aufl_layout[IDX_FIRMWARE].start = start;
 399                 aufl_layout[IDX_FIRMWARE].end = end;
 400         }
 401         start = -1;
 402         end = 0;
 403         env = getenv("kernel_st");
 404         if (env != NULL)
 405                 start = simple_strtoul(env, NULL, 16);
 406         env = getenv("kernel_nd");
 407         if (env != NULL)
 408                 end = simple_strtoul(env, NULL, 16);
 409         if (start >= 0 && end && end > start) {
 410                 ausize[IDX_KERNEL] = (end + 1) - start;
 411                 aufl_layout[IDX_KERNEL].start = start;
 412                 aufl_layout[IDX_KERNEL].end = end;
 413         }
 414         start = -1;
 415         end = 0;
 416         env = getenv("rootfs_st");
 417         if (env != NULL)
 418                 start = simple_strtoul(env, NULL, 16);
 419         env = getenv("rootfs_nd");
 420         if (env != NULL)
 421                 end = simple_strtoul(env, NULL, 16);
 422         if (start >= 0 && end && end > start) {
 423                 ausize[IDX_ROOTFS] = (end + 1) - start;
 424                 aufl_layout[IDX_ROOTFS].start = start;
 425                 aufl_layout[IDX_ROOTFS].end = end;
 426         }
 427
 428         /* make certain that HUSH is runnable */
 429         u_boot_hush_start();
 430         /* make sure that we see CTRL-C and save the old state */
 431         old_ctrlc = disable_ctrlc(0);
 432
 433         bitmap_first = 0;
 434
 435         /* validate the images first */
 436         for (i = 0; i < AU_MAXFILES; i++) {
 437                 ulong imsize;
 438                 /* just read the header */
 439                 sz = file_fat_read(aufile[i], LOAD_ADDR, sizeof(image_header_t));
 440                 debug ("read %s sz %ld hdr %d\n",
 441                         aufile[i], sz, sizeof(image_header_t));
 442                 if (sz <= 0 || sz < sizeof(image_header_t)) {
 443                         debug ("%s not found\n", aufile[i]);
 444                         ausize[i] = 0;
 445                         continue;
 446                 }
 447                 /* au_check_header_valid() updates ausize[] */
 448                 if ((imsize = au_check_header_valid(i, sz)) < 0) {
 449                         debug ("%s header not valid\n", aufile[i]);
 450                         continue;
 451                 }
 452                 /* totsize accounts for image size and flash erase size */
 453                 totsize += (imsize + (aufl_layout[i].end - aufl_layout[i].start));
 454         }
 455
 456 #ifdef CONFIG_PROGRESSBAR
 457         if (totsize) {
 458                 lcd_puts(" Update in progress\n");
 459                 lcd_enable();
 460         }
 461 #endif
 462
 463         /* just loop thru all the possible files */
 464         for (i = 0; i < AU_MAXFILES && totsize; i++) {
 465                 if (!ausize[i]) {
 466                         continue;
 467                 }
 468                 sz = file_fat_read(aufile[i], LOAD_ADDR, ausize[i]);
 469
 470                 debug ("read %s sz %ld hdr %d\n",
 471                         aufile[i], sz, sizeof(image_header_t));
 472
 473                 if (sz != ausize[i]) {
 474                         printf ("%s: size %d read %d?\n", aufile[i], ausize[i], sz);
 475                         continue;
 476                 }
 477
 478                 if (sz <= 0 || sz <= sizeof(image_header_t)) {
 479                         debug ("%s not found\n", aufile[i]);
 480                         continue;
 481                 }
 482                 if (au_check_cksum_valid(i, sz) < 0) {
 483                         debug ("%s checksum not valid\n", aufile[i]);
 484                         continue;
 485                 }
 486                 /* this is really not a good idea, but it's what the */
 487                 /* customer wants. */
 488                 cnt = 0;
 489                 got_ctrlc = 0;
 490                 do {
 491                         res = au_do_update(i, sz);
 492                         /* let the user break out of the loop */
 493                         if (ctrlc() || had_ctrlc()) {
 494                                 clear_ctrlc();
 495                                 if (res < 0)
 496                                         got_ctrlc = 1;
 497                                 break;
 498                         }
 499                         cnt++;
 500 #ifdef AU_TEST_ONLY
 501                 } while (res < 0 && cnt < (AU_MAXFILES + 1));
 502                 if (cnt < (AU_MAXFILES + 1))
 503 #else
 504                 } while (res < 0);
 505 #endif
 506         }
 507         usb_stop();
 508         /* restore the old state */
 509         disable_ctrlc(old_ctrlc);
 510 #ifdef CONFIG_PROGRESSBAR
 511         if (totsize) {
 512                 if (!res) {
 513                         lcd_puts("\n  Update completed\n");
 514                 } else {
 515                         lcd_puts("\n   Update error\n");
 516                 }
 517                 lcd_enable();
 518         }
 519 #endif
 520         return 0;
 521 }
 522 #endif /* CONFIG_AUTO_UPDATE */