target/linux/rdc-2.6/files/drivers/mtd/maps/rdc3210.c

   1 /*******************************************************************
   2  * Simple Flash mapping for RDC3210                                *
   3  *                                                                 *
   4  *                                                     2005.03.23  *
   5  *                              Dante Su (dante_su@gemtek.com.tw)  *
   6  *                          Copyright (C) 2005 Gemtek Corporation  *
   7  *******************************************************************/
   8
   9 #include <linux/module.h>
  10 #include <linux/types.h>
  11 #include <linux/kernel.h>
  12 #include <asm/io.h>
  13 #include <linux/mtd/mtd.h>
  14 #include <linux/mtd/map.h>
  15 #include <linux/mtd/partitions.h>
  16 #include <linux/autoconf.h>
  17 #include <linux/squashfs_fs.h>
  18
  19 static struct mtd_info          *rdc3210_mtd;
  20
  21 struct map_info rdc3210_map =
  22 {
  23         .name =         "RDC3210 Flash",
  24         .size =         CONFIG_MTD_RDC3210_SIZE,
  25         .bankwidth =    CONFIG_MTD_RDC3210_BUSWIDTH,
  26 };
  27
  28 /* Dante: This is the default static mapping, however this is nothing but a hint. (Say dynamic mapping) */
  29 static struct mtd_partition rdc3210_parts[] =
  30 {
  31         { name: "linux",   offset:  0,          size: 0x003C0000 },     /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
  32         { name: "romfs",   offset:  0x000C0000, size: 0x00300000 },     /* 3072 KB */
  33         { name: "nvram",   offset:  0x003C0000, size: 0x00010000 },     /*   64 KB */
  34 #ifdef CONFIG_MTD_RDC3210_FACTORY_PRESENT
  35         { name: "factory", offset:  0x003D0000, size: 0x00010000 },     /*   64 KB */
  36 #endif
  37         { name: "bootldr", offset:  0x003E0000, size: 0x00020000 },     /*  128 KB */
  38 };
  39
  40 static __u32 crctab[257] = {
  41         0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
  42         0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
  43         0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
  44         0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
  45         0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
  46         0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
  47         0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
  48         0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
  49         0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
  50         0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
  51         0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
  52         0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
  53         0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
  54         0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
  55         0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
  56         0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
  57         0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
  58         0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
  59         0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
  60         0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
  61         0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
  62         0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
  63         0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
  64         0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
  65         0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
  66         0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
  67         0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
  68         0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
  69         0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
  70         0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
  71         0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
  72         0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
  73         0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
  74         0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
  75         0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
  76         0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
  77         0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
  78         0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
  79         0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
  80         0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
  81         0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
  82         0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
  83         0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
  84         0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
  85         0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
  86         0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
  87         0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
  88         0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
  89         0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
  90         0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
  91         0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
  92         0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
  93         0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
  94         0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
  95         0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
  96         0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
  97         0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
  98         0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
  99         0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
 100         0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
 101         0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
 102         0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
 103         0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
 104         0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
 105         0
 106 };
 107
 108 static __u32 crc32(__u8 * buf, __u32 len)
 109 {
 110         register int i;
 111         __u32 sum;
 112         register __u32 s0;
 113         s0 = ~0;
 114         for (i = 0; i < len; i++) {
 115                 s0 = (s0 >> 8) ^ crctab[(__u8) (s0 & 0xFF) ^ buf[i]];
 116         }
 117         sum = ~s0;
 118         return sum;
 119 }
 120
 121 static void erase_callback(struct erase_info *done)
 122 {
 123         wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
 124         wake_up(wait_q);
 125 }
 126
 127 static int erase_write (struct mtd_info *mtd, unsigned long pos,
 128                         int len, const char *buf)
 129 {
 130         struct erase_info erase;
 131         DECLARE_WAITQUEUE(wait, current);
 132         wait_queue_head_t wait_q;
 133         size_t retlen;
 134         int ret;
 135
 136         /*
 137          * First, let's erase the flash block.
 138          */
 139
 140         init_waitqueue_head(&wait_q);
 141         erase.mtd = mtd;
 142         erase.callback = erase_callback;
 143         erase.addr = pos;
 144         erase.len = len;
 145         erase.priv = (u_long)&wait_q;
 146
 147         set_current_state(TASK_INTERRUPTIBLE);
 148         add_wait_queue(&wait_q, &wait);
 149
 150         ret = mtd->erase(mtd, &erase);
 151         if (ret) {
 152                 set_current_state(TASK_RUNNING);
 153                 remove_wait_queue(&wait_q, &wait);
 154                 printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
 155                                      "on \"%s\" failed\n",
 156                         pos, len, mtd->name);
 157                 return ret;
 158         }
 159
 160         schedule();  /* Wait for erase to finish. */
 161         remove_wait_queue(&wait_q, &wait);
 162
 163         /*
 164          * Next, writhe data to flash.
 165          */
 166
 167         ret = mtd->write (mtd, pos, len, &retlen, buf);
 168         if (ret)
 169                 return ret;
 170         if (retlen != len)
 171                 return -EIO;
 172         return 0;
 173 }
 174
 175 static int __init init_rdc3210_map(void)
 176 {
 177         rdc3210_map.phys = -rdc3210_map.size;
 178         printk(KERN_NOTICE "flash device: %x at %x\n", rdc3210_map.size, rdc3210_map.phys);
 179
 180         rdc3210_map.map_priv_1 = (unsigned long)(rdc3210_map.virt = ioremap_nocache(rdc3210_map.phys, rdc3210_map.size));
 181
 182         if (!rdc3210_map.map_priv_1)
 183         {
 184                 printk("Failed to ioremap\n");
 185                 return -EIO;
 186         }
 187         rdc3210_mtd = do_map_probe("cfi_probe", &rdc3210_map);
 188 #ifdef CONFIG_MTD_RDC3210_STATIC_MAP    /* Dante: This is for fixed map */
 189         if (rdc3210_mtd)
 190         {
 191                 rdc3210_mtd->module = THIS_MODULE;
 192                 add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
 193                 return 0;
 194         }
 195 #else   /* Dante: This is for dynamic mapping */
 196
 197 #include "imghdr.h"
 198
 199         if (rdc3210_mtd)
 200         {       // Dante
 201                 gt_imghdr_t     *hdr = (gt_imghdr_t *)(rdc3210_map.map_priv_1)
 202 #ifdef CONFIG_MTD_RDC3210_ALLOW_JFFS2
 203                         , *ptmp
 204 #endif
 205                         ;
 206                 unsigned int    tmp = hdr->kernelsz + sizeof(gt_imghdr_t), tmp2 = rdc3210_mtd->erasesize;
 207                 unsigned int    tmp3 = ((tmp / 32) + ((tmp % 32) ? 1 : 0)) * 32;
 208                 unsigned int    tmp4 = ((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2;
 209                 int     len;
 210
 211                 if(memcmp(hdr->magic, GTIMG_MAGIC, 4))
 212                 {
 213                         iounmap((void *)rdc3210_map.map_priv_1);
 214                         rdc3210_map.map_priv_1 = 0L;
 215                         rdc3210_map.virt = NULL;
 216                         printk("Invalid MAGIC for Firmware Image!!!\n");
 217                         return -EIO;
 218                 }
 219 #ifdef CONFIG_MTD_RDC3210_ALLOW_JFFS2
 220                 tmp = (tmp3 == tmp4) ? tmp4 + tmp2 : tmp4;
 221                 if ((ptmp = (gt_imghdr_t *)vmalloc(tmp)) == NULL)
 222                 {
 223                         iounmap((void *)rdc3210_map.map_priv_1);
 224                         rdc3210_map.map_priv_1 = 0L;
 225                         rdc3210_map.virt = NULL;
 226                         printk("Can't allocate 0x%08x for flash-reading buffer!\n", tmp);
 227                         return -ENOMEM;
 228                 }
 229                 if (rdc3210_mtd->read(rdc3210_mtd, 0, tmp, &len, (__u8 *)ptmp) || len != tmp)
 230                 {
 231                         vfree(ptmp);
 232                         iounmap((void *)rdc3210_map.map_priv_1);
 233                         rdc3210_map.map_priv_1 = 0L;
 234                         rdc3210_map.virt = NULL;
 235                         printk("Can't read that much flash! Read 0x%08x of it.\n", len);
 236                         return -EIO;
 237                 }
 238 #endif
 239 #ifdef CONFIG_MTD_RDC3210_FACTORY_PRESENT
 240                 /* 1. Adjust Redboot */
 241                 tmp = rdc3210_mtd->size - rdc3210_parts[4].size;
 242                 rdc3210_parts[4].offset = tmp - (tmp % tmp2);
 243                 rdc3210_parts[4].size   = rdc3210_mtd->size - rdc3210_parts[4].offset;
 244
 245                 /* 2. Adjust Factory Default */
 246                 tmp -= rdc3210_parts[3].size;
 247                 rdc3210_parts[3].offset = tmp - (tmp % tmp2);
 248                 rdc3210_parts[3].size   = rdc3210_parts[4].offset - rdc3210_parts[3].offset;
 249 #else
 250                 /* 1. Adjust Redboot */
 251                 tmp = rdc3210_mtd->size - rdc3210_parts[3].size;
 252                 rdc3210_parts[3].offset = tmp - (tmp % tmp2);
 253                 rdc3210_parts[3].size   = rdc3210_mtd->size - rdc3210_parts[3].offset;
 254 #endif
 255                 /* 3. Adjust NVRAM */
 256 #ifdef CONFIG_MTD_RDC3210_ALLOW_JFFS2
 257                 if (*(__u32 *)(((unsigned char *)ptmp)+tmp3) == SQUASHFS_MAGIC)
 258                 {
 259                         len = 1;
 260                         tmp4 = tmp3;
 261                         tmp = hdr->imagesz;
 262                 rdc3210_parts[2].name   = "rootfs";
 263                 rdc3210_parts[2].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
 264                 }
 265                 else
 266 #else
 267                         tmp4 = tmp3;
 268 #endif
 269                 {
 270                         len = 0;
 271                 tmp -= rdc3210_parts[2].size;
 272                 rdc3210_parts[2].offset = tmp - (tmp % tmp2);
 273                 }
 274                 rdc3210_parts[2].size   = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
 275
 276                 /* 4. Adjust Linux (Kernel + ROMFS) */
 277                 rdc3210_parts[0].size   = rdc3210_parts[len + 2].offset - rdc3210_parts[0].offset;
 278
 279                 /* 5. Adjust ROMFS */
 280                 rdc3210_parts[1].offset = rdc3210_parts[0].offset + tmp4;
 281                 rdc3210_parts[1].size   = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
 282 #ifdef CONFIG_MTD_RDC3210_ALLOW_JFFS2
 283                 if (!(hdr->reserved || len))
 284                 {
 285                         __u8    buf[1024];
 286                         ptmp->reserved = hdr->imagesz;
 287                         ptmp->imagesz  = tmp4;
 288                         ptmp->checksum = ptmp->fastcksum = 0;
 289                         memcpy(buf, ptmp, 0x100);
 290                         memcpy(buf + 0x100, ((__u8 *)ptmp) + ((tmp4 >> 1) - ((tmp4 & 0x6) >> 1)), 0x100);
 291                         memcpy(buf + 0x200, ((__u8 *)ptmp) + (tmp4 - 0x200), 0x200);
 292                         ptmp->fastcksum = crc32(buf, sizeof(buf));
 293                         ptmp->checksum = crc32((__u8 *)ptmp, tmp4);
 294                         if (rdc3210_mtd->unlock) rdc3210_mtd->unlock(rdc3210_mtd, 0, tmp2);
 295                         if ((len = erase_write(rdc3210_mtd, 0, tmp2, (char *)ptmp)))
 296                         {
 297                                 vfree(ptmp);
 298                                 iounmap((void *)rdc3210_map.map_priv_1);
 299                                 rdc3210_map.map_priv_1 = 0L;
 300                                 rdc3210_map.virt = NULL;
 301                                 printk("Couldn't erase! Got %d.\n", len);
 302                                 return len;
 303                         }
 304                         if (rdc3210_mtd->sync) rdc3210_mtd->sync(rdc3210_mtd);
 305                 }
 306                 vfree(ptmp);
 307 #endif
 308                 rdc3210_mtd->owner = THIS_MODULE;
 309                 add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
 310                 return 0;
 311         }
 312 #endif
 313         iounmap((void *)rdc3210_map.map_priv_1);
 314         rdc3210_map.map_priv_1 = 0L;
 315         rdc3210_map.virt = NULL;
 316         return -ENXIO;
 317 }
 318
 319 static void __exit cleanup_rdc3210_map(void)
 320 {
 321         if (rdc3210_mtd)
 322         {
 323                 del_mtd_partitions(rdc3210_mtd);
 324                 map_destroy(rdc3210_mtd);
 325         }
 326
 327         if (rdc3210_map.map_priv_1)
 328         {
 329                 iounmap((void *)rdc3210_map.map_priv_1);
 330                 rdc3210_map.map_priv_1 = 0L;
 331                 rdc3210_map.virt = NULL;
 332         }
 333 }
 334
 335 module_init(init_rdc3210_map);
 336 module_exit(cleanup_rdc3210_map);