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/config.h>
  17
  18 #ifndef RDC3210_STATIC_MAP
  19 #define RDC3210_STATIC_MAP      0
  20 #endif
  21 #ifndef RDC3210_NO_FACTORY_DFLT
  22 #define RDC3210_NO_FACTORY_DFLT 1
  23 #endif
  24 #ifndef RDC3210_USING_JFFS2
  25 #define RDC3210_USING_JFFS2     1
  26 #endif
  27
  28 #define WINDOW_ADDR             0xFFC00000
  29 #define WINDOW_SIZE             0x00400000
  30
  31 #define BUSWIDTH 2
  32
  33 /* Dante: linked from linux-2.4.x/drivers/mtd/chips/flashdrv.c */
  34 extern int flashdrv_get_size(void);
  35 extern int flashdrv_get_sector(int addr);
  36 extern int flashdrv_get_sector_addr(int sector);
  37 extern int flashdrv_get_sector_size(int sector);
  38
  39 static struct mtd_info          *rdc3210_mtd;
  40
  41 __u8  rdc3210_map_read8(struct map_info *map, unsigned long ofs)
  42 {
  43         return *(__u8 *)(map->map_priv_1 + ofs);
  44 }
  45
  46 __u16 rdc3210_map_read16(struct map_info *map, unsigned long ofs)
  47 {
  48         return *(__u16 *)(map->map_priv_1 + ofs);
  49 }
  50
  51 __u32 rdc3210_map_read32(struct map_info *map, unsigned long ofs)
  52 {
  53         return *(__u32 *)(map->map_priv_1 + ofs);
  54 }
  55
  56 void rdc3210_map_write8(struct map_info *map, __u8 d, unsigned long adr)
  57 {
  58         *(__u8 *)(map->map_priv_1 + adr) = d;
  59 }
  60
  61 void rdc3210_map_write16(struct map_info *map, __u16 d, unsigned long adr)
  62 {
  63         *(__u16 *)(map->map_priv_1 + adr) = d;
  64 }
  65
  66 void rdc3210_map_write32(struct map_info *map, __u32 d, unsigned long adr)
  67 {
  68         *(__u32 *)(map->map_priv_1 + adr) = d;
  69 }
  70
  71 void rdc3210_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
  72 {
  73         int     i;
  74         u16     *dst = (u16 *)(to);
  75         u16     *src = (u16 *)(map->map_priv_1 + from);
  76
  77         for(i = 0; i < (len / 2); ++i)
  78                 dst[i] = src[i];
  79
  80         if(len & 1)
  81         {
  82                 printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
  83                 //dst[len - 1] = B0(src[i]);
  84         }
  85 }
  86
  87 void rdc3210_map_copy_to(struct map_info *map, void *to, unsigned long from, ssize_t len)
  88 {
  89         int     i;
  90         u16     *dst = (u16 *)(map->map_priv_1 + to);
  91         u16     *src = (u16 *)(from);
  92
  93         for(i = 0; i < (len / 2); ++i)
  94                 dst[i] = src[i];
  95
  96         if(len & 1)
  97         {
  98                 printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
  99                 //dst[len - 1] = B0(src[i]);
 100         }
 101 }
 102
 103 struct map_info rdc3210_map =
 104 {
 105         name:           "RDC3210 Flash",
 106         size:           WINDOW_SIZE,
 107         buswidth:       BUSWIDTH,
 108         read8:          rdc3210_map_read8,
 109         read16:         rdc3210_map_read16,
 110         read32:         rdc3210_map_read32,
 111         copy_from:      rdc3210_map_copy_from,
 112         write8:         rdc3210_map_write8,
 113         write16:        rdc3210_map_write16,
 114         write32:        rdc3210_map_write32,
 115         copy_to:        rdc3210_map_copy_to,
 116 };
 117
 118 /* Dante: This is the default static mapping, however this is nothing but a hint. (Say dynamic mapping) */
 119 static struct mtd_partition rdc3210_parts[] =
 120 {
 121         { name: "linux",   offset:  0,          size: 0x003C0000 },     /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
 122         { name: "romfs",   offset:  0x000C0000, size: 0x00300000 },     /* 3072 KB */
 123         { name: "nvram",   offset:  0x003C0000, size: 0x00010000 },     /*   64 KB */
 124 #if RDC3210_STATIC_MAP || !RDC3210_NO_FACTORY_DFLT
 125         { name: "factory", offset:  0x003D0000, size: 0x00010000 },     /*   64 KB */
 126 #endif
 127         { name: "bootldr", offset:  0x003E0000, size: 0x00020000 },     /*  128 KB */
 128 };
 129
 130 #if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
 131 #define init_rdc3210_map                init_module
 132 #define cleanup_rdc3210_map             cleanup_module
 133 #endif
 134
 135 mod_init_t init_rdc3210_map(void)
 136 {
 137         printk(KERN_NOTICE "flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
 138
 139         rdc3210_map.map_priv_1 = ioremap(WINDOW_ADDR, WINDOW_SIZE);
 140
 141         if (!rdc3210_map.map_priv_1)
 142         {
 143                 printk("Failed to ioremap\n");
 144                 return -EIO;
 145         }
 146         rdc3210_mtd = do_map_probe("cfi_probe", &rdc3210_map);
 147 #if RDC3210_STATIC_MAP  /* Dante: This is for fixed map */
 148         if (rdc3210_mtd)
 149         {
 150                 rdc3210_mtd->module = THIS_MODULE;
 151                 add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
 152                 return 0;
 153         }
 154 #else   /* Dante: This is for dynamic mapping */
 155
 156 #include <gemtek/sysdep.h>
 157 #include <gemtek/imghdr.h>
 158
 159         if (rdc3210_mtd)
 160         {       // Dante
 161 #if RDC3210_USING_JFFS2
 162                 unsigned int    tmp, tmp2 = rdc3210_mtd->erasesize;
 163 #else
 164                 unsigned int    tmp, tmp2 = 32;
 165 #endif
 166                 gt_imghdr_t     *hdr;
 167
 168                 hdr = (gt_imghdr_t *)(rdc3210_map.map_priv_1);
 169
 170                 if(memcmp(hdr->magic, GTIMG_MAGIC, 4))
 171                 {
 172                         printk("Invalid MAGIC for Firmware Image!!!\n");
 173                         return -EIO;
 174                 }
 175
 176                 /* 1. Adjust Redboot */
 177                 tmp = flashdrv_get_size() - rdc3210_parts[4].size;
 178                 rdc3210_parts[4].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
 179                 rdc3210_parts[4].size   = flashdrv_get_size() - rdc3210_parts[4].offset;
 180
 181                 /* 2. Adjust NVRAM */
 182                 tmp -= rdc3210_parts[3].size;
 183                 rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
 184                 rdc3210_parts[3].size   = rdc3210_parts[4].offset - rdc3210_parts[3].offset;
 185
 186                 /* 3. Adjust Factory Default */
 187                 tmp -= rdc3210_parts[2].size;
 188                 rdc3210_parts[2].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
 189                 rdc3210_parts[2].size   = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
 190
 191                 /* 4. Adjust Linux (Kernel + ROMFS) */
 192                 rdc3210_parts[0].size   = rdc3210_parts[2].offset - rdc3210_parts[0].offset;
 193
 194                 /* 5. Adjust ROMFS */
 195                 tmp = hdr->kernelsz + sizeof(gt_imghdr_t);
 196                 rdc3210_parts[1].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
 197                 rdc3210_parts[1].size   = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
 198 #if RDC3210_NO_FACTORY_DFLT
 199                 /* 1. Adjust Redboot */
 200                 tmp = flashdrv_get_size() - rdc3210_parts[3].size;
 201                 rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
 202                 rdc3210_parts[3].size   = flashdrv_get_size() - rdc3210_parts[3].offset;
 203
 204                 /* 2. Adjust NVRAM */
 205                 tmp -= rdc3210_parts[2].size;
 206                 rdc3210_parts[2].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
 207                 rdc3210_parts[2].size   = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
 208
 209                 /* 4. Adjust Linux (Kernel + ROMFS) */
 210                 rdc3210_parts[0].size   = rdc3210_parts[2].offset - rdc3210_parts[0].offset;
 211
 212                 /* 5. Adjust ROMFS */
 213                 tmp = hdr->kernelsz + sizeof(gt_imghdr_t);
 214                 rdc3210_parts[1].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
 215                 rdc3210_parts[1].size   = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
 216 #endif
 217
 218                 rdc3210_mtd->module = THIS_MODULE;
 219                 add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
 220                 return 0;
 221         }
 222 #endif
 223
 224         iounmap((void *)rdc3210_map.map_priv_1);
 225         return -ENXIO;
 226 }
 227
 228 mod_exit_t cleanup_rdc3210_map(void)
 229 {
 230         if (rdc3210_mtd)
 231         {
 232                 del_mtd_partitions(rdc3210_mtd);
 233                 map_destroy(rdc3210_mtd);
 234         }
 235
 236         if (rdc3210_map.map_priv_1)
 237         {
 238                 iounmap((void *)rdc3210_map.map_priv_1);
 239                 rdc3210_map.map_priv_1 = NULL;
 240         }
 241 }
 242
 243 module_init(init_rdc3210_map);
 244 module_exit(cleanup_rdc3210_map);