util/flash_and_burn/flash_rom.c

   1 /*
   2  * flash_rom.c: Flash programming utility for SiS 630/950 M/Bs
   3  *
   4  *
   5  * Copyright 2000 Silicon Integrated System Corporation
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  *      This program is distributed in the hope that it will be useful,
  13  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *      GNU General Public License for more details.
  16  *
  17  *      You should have received a copy of the GNU General Public License
  18  *      along with this program; if not, write to the Free Software
  19  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  *
  22  * Reference:
  23  *      1. SiS 630 Specification
  24  *      2. SiS 950 Specification
  25  *
  26  * $Id$
  27  */
  28
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <sys/mman.h>
  32 #include <unistd.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35 #include <stdlib.h>
  36
  37 #include "flash.h"
  38 #include "jedec.h"
  39 #include "m29f400bt.h"
  40 #include "82802ab.h"
  41 #include "msys_doc.h"
  42 #include "am29f040b.h"
  43 #include "sst28sf040.h"
  44 #include "w49f002u.h"
  45 #include "sst39sf020.h"
  46 #include "sst49lf040.h"
  47 #include "pm49fl004.h"
  48 #include "mx29f002.h"
  49
  50 struct flashchip flashchips[] = {
  51         {"Am29F040B",   AMD_ID,     AM_29F040B,   NULL, 512, 64*1024,
  52          probe_29f040b, erase_29f040b, write_29f040b, NULL},
  53         {"At29C040A",   ATMEL_ID,   AT_29C040A,   NULL, 512, 256,
  54          probe_jedec,   erase_jedec,   write_jedec, NULL},
  55         {"Mx29f002",    MX_ID,      MX_29F002,    NULL, 256, 64*1024,
  56          probe_29f002,  erase_29f002,  write_29f002, NULL},
  57         {"SST29EE020A", SST_ID,     SST_29EE020A, NULL, 256, 128,
  58          probe_jedec,   erase_jedec,   write_jedec, NULL},
  59         {"SST28SF040A", SST_ID,     SST_28SF040,  NULL, 512, 256,
  60          probe_28sf040, erase_28sf040, write_28sf040, NULL},
  61         {"SST39SF020A", SST_ID,     SST_39SF020,  NULL, 256, 4096,
  62          probe_39sf020, erase_39sf020, write_39sf020, NULL},
  63         {"SST39VF020",  SST_ID,     SST_39VF020,  NULL, 256, 4096,
  64          probe_39sf020, erase_39sf020, write_39sf020, NULL},
  65         {"SST49LF040",  SST_ID, SST_49LF040,  NULL, 512, 4096,
  66          probe_49lf040, erase_49lf040, write_49lf040, NULL},
  67         //By LYH begin
  68         {"Pm49FL004",   PMC_ID,     PMC_49FL004,  NULL, 512, 64*1024,
  69          probe_49fl004, erase_49fl004, write_49fl004, NULL},
  70         //END
  71         {"W29C011",     WINBOND_ID, W_29C011,    NULL, 128, 128,
  72          probe_jedec,   erase_jedec,   write_jedec, NULL},
  73         {"W29C020C",    WINBOND_ID, W_29C020C,    NULL, 256, 128,
  74          probe_jedec,   erase_jedec,   write_jedec, NULL},
  75         {"W49F002U",    WINBOND_ID, W_49F002U,    NULL, 256, 128,
  76          probe_49f002,  erase_49f002,   write_49f002, NULL},
  77         {"M29F400BT",   ST_ID, ST_M29F400BT ,    NULL, 512, 64*1024,
  78          probe_m29f400bt,   erase_m29f400bt,   write_linuxbios_m29f400bt, NULL},
  79         {"82802ab",     137,   173 ,    NULL, 512, 64*1024,
  80          probe_82802ab, erase_82802ab,   write_82802ab, NULL},
  81         {"82802ac",     137,   172 ,    NULL, 1024, 64*1024,
  82          probe_82802ab, erase_82802ab,   write_82802ab, NULL},
  83         {"MD-2802 (M-Systems DiskOnChip Millennium Module)",
  84          MSYSTEMS_ID, MSYSTEMS_MD2802,
  85          NULL, 8, 8*1024,
  86          probe_md2802, erase_md2802, write_md2802, read_md2802},
  87         {NULL,}
  88 };
  89
  90 char *chip_to_probe = NULL;
  91
  92 struct flashchip * probe_flash(struct flashchip * flash)
  93 {
  94         int fd_mem;
  95         volatile char * bios;
  96         unsigned long size;
  97
  98         if ((fd_mem = open("/dev/mem", O_RDWR)) < 0) {
  99                 perror("Can not open /dev/mem");
 100                 exit(1);
 101         }
 102
 103         while (flash->name != NULL) {
 104                 if (chip_to_probe && strcmp(flash->name, chip_to_probe) != 0) {
 105                         flash++;
 106                         continue;
 107                 }
 108                 printf("Trying %s, %d KB\n", flash->name, flash->total_size);
 109                 size = flash->total_size * 1024;
 110                 /* BUG? what happens if getpagesize() > size!?
 111                    -> ``Error MMAP /dev/mem: Invalid argument'' NIKI */
 112                 if (getpagesize() > size) {
 113                         size = getpagesize();
 114                         printf("%s: warning: size: %d -> %ld\n", __FUNCTION__,
 115                                flash->total_size * 1024, (unsigned long)size);
 116                 }
 117                 bios = mmap (0, size, PROT_WRITE | PROT_READ, MAP_SHARED,
 118                              fd_mem, (off_t) (0xffffffff - size + 1));
 119                 if (bios == MAP_FAILED) {
 120                         perror("Error MMAP /dev/mem");
 121                         exit(1);
 122                 }
 123                 flash->virt_addr = bios;
 124                 flash->fd_mem = fd_mem;
 125
 126                 if (flash->probe(flash) == 1) {
 127                         printf ("%s found at physical address: 0x%lx\n",
 128                                 flash->name, (0xffffffff - size + 1));
 129                         return flash;
 130                 }
 131                 munmap ((void *) bios, size);
 132                 flash++;
 133         }
 134         return NULL;
 135 }
 136
 137 int verify_flash (struct flashchip * flash, char * buf, int verbose)
 138 {
 139         int i = 0;
 140         int total_size = flash->total_size *1024;
 141         volatile char * bios = flash->virt_addr;
 142
 143         printf("Verifying address: ");
 144         while (i++ < total_size) {
 145                 if (verbose)
 146                         printf("0x%08x", i);
 147                 if (*(bios+i) != *(buf+i)) {
 148                         printf("FAILED\n");
 149                         return 0;
 150                 }
 151                 if (verbose)
 152                         printf("\b\b\b\b\b\b\b\b\b\b");
 153         }
 154         if (verbose)
 155                 printf("\n");
 156         else
 157                 printf("VERIFIED\n");
 158         return 1;
 159 }
 160
 161
 162 void usage(const char *name)
 163 {
 164         printf("usage: %s [-rwv] [-c chipname][file]\n", name);
 165         printf("-r: read flash and save into file\n"
 166                "-w: write file into flash (default when file is specified)\n"
 167                "-v: verify flash against file\n"
 168                "-c: probe only for specified flash chip\n"
 169                " If no file is specified, then all that happens\n"
 170                " is that flash info is dumped\n");
 171         exit(1);
 172 }
 173
 174 int main (int argc, char * argv[])
 175 {
 176         char * buf;
 177         unsigned long size;
 178         FILE * image;
 179         struct flashchip * flash;
 180         int opt;
 181         int read_it = 0, write_it = 0, verify_it = 0;
 182         char *filename = NULL;
 183
 184         setbuf(stdout, NULL);
 185
 186         while ((opt = getopt(argc, argv, "rwvc:")) != EOF) {
 187                 switch (opt) {
 188                 case 'r':
 189                         read_it = 1;
 190                         break;
 191                 case 'w':
 192                         write_it = 1;
 193                         break;
 194                 case 'v':
 195                         verify_it = 1;
 196                         break;
 197                 case 'c':
 198                         chip_to_probe = strdup(optarg);
 199                         break;
 200                 default:
 201                         usage(argv[0]);
 202                         break;
 203                 }
 204         }
 205         if (read_it && write_it) {
 206                 printf("-r and -w are mutually exclusive\n");
 207                 usage(argv[0]);
 208         }
 209
 210         if (optind < argc)
 211                 filename = argv[optind++];
 212
 213         printf("Calibrating timer since microsleep sucks ... takes a second\n");
 214         myusec_calibrate_delay();
 215         printf("OK, calibrated, now do the deed\n");
 216
 217         /* try to enable it. Failure IS an option, since not all motherboards
 218          * really need this to be done, etc., etc. It sucks.
 219          */
 220         (void) enable_flash_write();
 221
 222         if ((flash = probe_flash (flashchips)) == NULL) {
 223                 printf("EEPROM not found\n");
 224                 exit(1);
 225         }
 226
 227         printf("Part is %s\n", flash->name);
 228         if (!filename){
 229                 printf("OK, only ENABLING flash write, but NOT FLASHING\n");
 230                 return 0;
 231         }
 232         size = flash->total_size * 1024;
 233         buf = (char *) calloc (size, sizeof(char));
 234
 235         if (read_it) {
 236                 if ((image = fopen (filename, "w")) == NULL) {
 237                         perror(filename);
 238                         exit(1);
 239                 }
 240                 printf("Reading Flash...");
 241                 if(flash->read == NULL)
 242                         memcpy(buf, (const char *) flash->virt_addr, size);
 243                 else
 244                         flash->read (flash, buf);
 245                 fwrite(buf, sizeof(char), size, image);
 246                 fclose(image);
 247                 printf("done\n");
 248         } else {
 249                 if ((image = fopen (filename, "r")) == NULL) {
 250                         perror(filename);
 251                         exit(1);
 252                 }
 253                 fread (buf, sizeof(char), size, image);
 254                 fclose(image);
 255         }
 256
 257         if (write_it || (!read_it && !verify_it))
 258                 flash->write (flash, buf);
 259         if (verify_it)
 260                 verify_flash (flash, buf, /* verbose = */ 0);
 261         return 0;
 262 }