target/linux/generic/patches-2.6.33/014-cfi_fix_amd_extended_table_check.patch

   1 --- a/drivers/mtd/chips/cfi_cmdset_0002.c
   2 +++ b/drivers/mtd/chips/cfi_cmdset_0002.c
   3 @@ -325,6 +325,8 @@ static struct cfi_fixup fixup_table[] =
   4  static void cfi_fixup_major_minor(struct cfi_private *cfi,
   5                                   struct cfi_pri_amdstd *extp)
   6  {
   7 +       // manufacturers defined in include/linux/mtd/cfi.h
   8 +
   9         if (cfi->mfr == CFI_MFR_SAMSUNG && cfi->id == 0x257e &&
  10             extp->MajorVersion == '0')
  11                 extp->MajorVersion = '1';
  12 @@ -355,6 +357,9 @@ struct mtd_info *cfi_cmdset_0002(struct
  13         mtd->name    = map->name;
  14         mtd->writesize = 1;
  15
  16 +       printk(" CFI mfr 0x%08x\n", cfi->mfr);  // TODO: Is there a more general place to print this info?
  17 +       printk(" CFI id  0x%08x\n", cfi->id);
  18 +
  19         if (cfi->cfi_mode==CFI_MODE_CFI){
  20                 unsigned char bootloc;
  21                 /*
  22 @@ -373,16 +378,24 @@ struct mtd_info *cfi_cmdset_0002(struct
  23
  24                 cfi_fixup_major_minor(cfi, extp);
  25
  26 -               if (extp->MajorVersion != '1' ||
  27 -                   (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
  28 +               // valid primary extension versions are: 1.0, 1.1, 1.2, 1.3
  29 +               // see: http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_r20.pdf, page 19 and on
  30 +               //      http://www.amd.com/us-en/assets/content_type/DownloadableAssets/cfi_100_20011201.pdf
  31 +               if (extp->MajorVersion < '1' ||
  32 +                   extp->MajorVersion > '1' ||
  33 +                   (extp->MajorVersion == '1' && ( extp->MinorVersion < '0' || extp->MinorVersion > '3'))) {
  34                         printk(KERN_ERR "  Unknown Amd/Fujitsu Extended Query "
  35 -                              "version %c.%c.\n",  extp->MajorVersion,
  36 -                              extp->MinorVersion);
  37 +                              "version %c.%c (0x%02x/0x%02x).\n",
  38 +                              extp->MajorVersion, extp->MinorVersion,
  39 +                              extp->MajorVersion, extp->MinorVersion);
  40                         kfree(extp);
  41                         kfree(mtd);
  42                         return NULL;
  43                 }
  44
  45 +               printk("  Amd/Fujitsu Extended Query version %c.%c.\n",
  46 +                      extp->MajorVersion, extp->MinorVersion);
  47 +
  48                 /* Install our own private info structure */
  49                 cfi->cmdset_priv = extp;
  50