target/linux/lantiq/patches-3.3/201-owrt-mtd_split.patch

   1 --- a/drivers/mtd/Kconfig
   2 +++ b/drivers/mtd/Kconfig
   3 @@ -31,6 +31,10 @@ config MTD_ROOTFS_SPLIT
   4         bool "Automatically split 'rootfs' partition for squashfs"
   5         default y
   6
   7 +config MTD_UIMAGE_SPLIT
   8 +       bool "Automatically split 'linux' partition into 'kernel' and 'rootfs'"
   9 +       default y
  10 +
  11  config MTD_REDBOOT_PARTS
  12         tristate "RedBoot partition table parsing"
  13         ---help---
  14 --- a/drivers/mtd/mtdpart.c
  15 +++ b/drivers/mtd/mtdpart.c
  16 @@ -867,6 +867,169 @@ static int refresh_rootfs_split(struct m
  17  }
  18  #endif /* CONFIG_MTD_ROOTFS_SPLIT */
  19
  20 +
  21 +#ifdef CONFIG_MTD_UIMAGE_SPLIT
  22 +static unsigned long find_uimage_size(struct mtd_info *mtd,
  23 +                                     unsigned long offset)
  24 +{
  25 +#define UBOOT_MAGIC    0x56190527
  26 +       unsigned long magic = 0;
  27 +       unsigned long temp;
  28 +       size_t len;
  29 +       int ret;
  30 +
  31 +       ret = mtd->read(mtd, offset, 4, &len, (void *)&magic);
  32 +       if (ret || len != sizeof(magic))
  33 +               return 0;
  34 +
  35 +       if (le32_to_cpu(magic) != UBOOT_MAGIC)
  36 +               return 0;
  37 +
  38 +       ret = mtd->read(mtd, offset + 12, 4, &len, (void *)&temp);
  39 +       if (ret || len != sizeof(temp))
  40 +               return 0;
  41 +
  42 +       return temp + 0x40;
  43 +}
  44 +
  45 +static unsigned long find_eva_size(struct mtd_info *mtd,
  46 +                                     unsigned long offset)
  47 +{
  48 +#define EVA_MAGIC      0xfeed1281
  49 +       unsigned long magic = 0;
  50 +       unsigned long temp;
  51 +       size_t len;
  52 +       int ret;
  53 +
  54 +       ret = mtd->read(mtd, offset, 4, &len, (void *)&magic);
  55 +       if (ret || len != sizeof(magic))
  56 +               return 0;
  57 +
  58 +       if (le32_to_cpu(magic) != EVA_MAGIC)
  59 +               return 0;
  60 +
  61 +       ret = mtd->read(mtd, offset + 4, 4, &len, (void *)&temp);
  62 +       if (ret || len != sizeof(temp))
  63 +               return 0;
  64 +
  65 +       /* add eva header size */
  66 +       temp = le32_to_cpu(temp) + 0x18;
  67 +
  68 +       temp &= ~0xffff;
  69 +       temp += 0x10000;
  70 +       return temp;
  71 +}
  72 +
  73 +static int detect_squashfs_partition(struct mtd_info *mtd, unsigned long offset)
  74 +{
  75 +       unsigned long temp;
  76 +       size_t len;
  77 +       int ret;
  78 +
  79 +       ret = mtd->read(mtd, offset, 4, &len, (void *)&temp);
  80 +       if (ret || len != sizeof(temp))
  81 +               return 0;
  82 +
  83 +
  84 +       return le32_to_cpu(temp) == SQUASHFS_MAGIC;
  85 +}
  86 +
  87 +static int detect_eva_squashfs_partition(struct mtd_info *mtd, unsigned long offset)
  88 +{
  89 +       unsigned long temp;
  90 +       size_t len;
  91 +       int ret;
  92 +
  93 +       ret = mtd->read(mtd, offset, 4, &len, (void *)&temp);
  94 +       if (ret || len != sizeof(temp))
  95 +               return 0;
  96 +
  97 +       return be32_to_cpu(temp) == SQUASHFS_MAGIC;
  98 +}
  99 +
 100 +static unsigned long find_brnimage_size(struct mtd_info *mtd,
 101 +                                     unsigned long offset)
 102 +{
 103 +       unsigned long buf[4];
 104 +       // Assume at most 2MB of kernel image
 105 +       unsigned long end = offset + (2 << 20);
 106 +       unsigned long ptr = offset + 0x400 - 12;
 107 +       size_t len;
 108 +       int ret;
 109 +
 110 +       while (ptr < end) {
 111 +               long size_min = ptr - 0x400 - 12 - offset;
 112 +               long size_max = ptr + 12 - offset;
 113 +               ret = mtd->read(mtd, ptr, 16, &len, (void *)buf);
 114 +               if (ret || len != 16)
 115 +                       return 0;
 116 +
 117 +               if (le32_to_cpu(buf[0]) < size_min ||
 118 +                   le32_to_cpu(buf[0]) > size_max) {
 119 +                       ptr += 0x400;
 120 +                       continue;
 121 +               }
 122 +
 123 +               if (le32_to_cpu(buf[3]) == SQUASHFS_MAGIC)
 124 +                       return ptr + 12 - offset;
 125 +
 126 +               ptr += 0x400;
 127 +       }
 128 +
 129 +       return 0;
 130 +}
 131 +
 132 +static int split_uimage(struct mtd_info *mtd,
 133 +                       const struct mtd_partition *part)
 134 +{
 135 +       static struct mtd_partition split_partitions[] = {
 136 +               {
 137 +                       .name = "kernel",
 138 +                       .offset = 0x0,
 139 +                       .size = 0x0,
 140 +               }, {
 141 +                       .name = "rootfs",
 142 +                       .offset = 0x0,
 143 +                       .size = 0x0,
 144 +               },
 145 +       };
 146 +
 147 +       split_partitions[0].size = find_uimage_size(mtd, part->offset);
 148 +       if (!split_partitions[0].size) {
 149 +               split_partitions[0].size = find_eva_size(mtd, part->offset);
 150 +               if (!split_partitions[0].size) {
 151 +                       split_partitions[0].size = find_brnimage_size(mtd, part->offset);
 152 +                       if (!split_partitions[0].size) {
 153 +                               printk(KERN_NOTICE "no uImage or brnImage or eva found in linux partition\n");
 154 +                               return -1;
 155 +                       }
 156 +               }
 157 +       }
 158 +
 159 +       if (detect_eva_squashfs_partition(mtd,
 160 +                                      part->offset
 161 +                                      + split_partitions[0].size)) {
 162 +               split_partitions[0].size += 0x100;
 163 +               pr_info("found eva dummy squashfs behind kernel\n");
 164 +       } else if (!detect_squashfs_partition(mtd,
 165 +                                      part->offset
 166 +                                      + split_partitions[0].size)) {
 167 +               split_partitions[0].size &= ~(mtd->erasesize - 1);
 168 +               split_partitions[0].size += mtd->erasesize;
 169 +       } else {
 170 +               pr_info("found squashfs behind kernel\n");
 171 +       }
 172 +
 173 +       split_partitions[0].offset = part->offset;
 174 +       split_partitions[1].offset = part->offset + split_partitions[0].size;
 175 +       split_partitions[1].size = part->size - split_partitions[0].size;
 176 +
 177 +       add_mtd_partitions(mtd, split_partitions, 2);
 178 +
 179 +       return 0;
 180 +}
 181 +#endif
 182 +
 183  /*
 184   * This function, given a master MTD object and a partition table, creates
 185   * and registers slave MTD objects which are bound to the master according to
 186 @@ -883,7 +1046,7 @@ int add_mtd_partitions(struct mtd_info *
 187         struct mtd_part *slave;
 188         uint64_t cur_offset = 0;
 189         int i;
 190 -#ifdef CONFIG_MTD_ROOTFS_SPLIT
 191 +#if defined(CONFIG_MTD_ROOTFS_SPLIT) || defined(CONFIG_MTD_UIMAGE_SPLIT)
 192         int ret;
 193  #endif
 194
 195 @@ -900,6 +1063,17 @@ int add_mtd_partitions(struct mtd_info *
 196
 197                 add_mtd_device(&slave->mtd);
 198
 199 +#ifdef CONFIG_MTD_UIMAGE_SPLIT
 200 +               if (!strcmp(parts[i].name, "linux")) {
 201 +                       ret = split_uimage(master, &parts[i]);
 202 +
 203 +                       if (ret) {
 204 +                               printk(KERN_WARNING
 205 +                                      "Can't split linux partition\n");
 206 +                       }
 207 +               }
 208 +#endif
 209 +
 210                 if (!strcmp(parts[i].name, "rootfs")) {
 211  #ifdef CONFIG_MTD_ROOTFS_ROOT_DEV
 212                         if (ROOT_DEV == 0) {
 213 --- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
 214 +++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_soc.h
 215 @@ -166,6 +166,7 @@ extern unsigned char ltq_boot_select(voi
 216
 217  extern __iomem void *ltq_ebu_membase;
 218  extern __iomem void *ltq_cgu_membase;
 219 +extern unsigned long ltq_brn_boot;
 220
 221  static inline int ltq_is_ase(void)
 222  {
 223 --- a/arch/mips/lantiq/setup.c
 224 +++ b/arch/mips/lantiq/setup.c
 225 @@ -18,6 +18,9 @@
 226  #include "devices.h"
 227  #include "prom.h"
 228
 229 +/* set to 1 if the bootloader is BRN-BOOT instead of u-boot */
 230 +unsigned long ltq_brn_boot = 0;
 231 +
 232  void __init plat_mem_setup(void)
 233  {
 234         /* assume 16M as default incase uboot fails to pass proper ramsize */
 235 @@ -38,6 +41,10 @@ void __init plat_mem_setup(void)
 236                         if (strict_strtoul(e, 0, &memsize))
 237                                 pr_warn("bad memsize specified\n");
 238                 }
 239 +               if (!strncmp(e, "BRN-BOOT", 8)){
 240 +                       pr_info("Found BRN-BOOT instead of u-boot\n");
 241 +                       ltq_brn_boot = 1;
 242 +               }
 243                 envp++;
 244         }
 245         memsize *= 1024 * 1024;