target/linux/rdc/files-2.6.28/drivers/mtd/maps/r8610.c

   1 /*
   2  * Flash memory access on RDC R8610 Evaluation board
   3  *
   4  * (C) 2009, Florian Fainelli
   5  */
   6
   7 #include <linux/init.h>
   8 #include <linux/module.h>
   9 #include <linux/types.h>
  10 #include <linux/kernel.h>
  11
  12 #include <linux/mtd/mtd.h>
  13 #include <linux/mtd/map.h>
  14 #include <linux/mtd/partitions.h>
  15
  16 #include <asm/io.h>
  17
  18 static struct map_info r8610_map = {
  19         .name           = "r8610",
  20         .size           = CONFIG_MTD_RDC3210_SIZE,
  21         .bankwidth      = CONFIG_MTD_RDC3210_BUSWIDTH,
  22 };
  23
  24 static struct mtd_partition r8610_partitions[] = {
  25         {
  26                 .name = "Kernel",
  27                 .size = 0x001f0000,
  28                 .offset = 0
  29         },{
  30                 .name = "Config",
  31                 .size = 0x10000,
  32                 .offset = MTDPART_OFS_APPEND,
  33         },{
  34                 .name = "Initrd",
  35                 .size = 0x1E0000,
  36                 .offset = MTDPART_OFS_APPEND,
  37         },{
  38                 .name = "Redboot",
  39                 .size = 0x20000,
  40                 .offset = MTDPART_OFS_APPEND,
  41                 .mask_flags = MTD_WRITEABLE
  42         }
  43 };
  44
  45 static struct mtd_info *mymtd;
  46
  47 int __init r8610_mtd_init(void)
  48 {
  49         struct mtd_partition *parts;
  50         int nb_parts = 0;
  51
  52         /*
  53          * Static partition definition selection
  54          */
  55         parts = r8610_partitions;
  56         nb_parts = ARRAY_SIZE(r8610_partitions);
  57
  58         /*
  59          * Now let's probe for the actual flash.  Do it here since
  60          * specific machine settings might have been set above.
  61          */
  62         r8610_map.phys = -r8610_map.size;
  63         printk(KERN_NOTICE "r8610: flash device: %lx at %x\n", r8610_map.size, r8610_map.phys);
  64
  65         r8610_map.map_priv_1 = (unsigned long)(r8610_map.virt = ioremap_nocache(r8610_map.phys, r8610_map.size));
  66         if (!r8610_map.map_priv_1) {
  67                 printk(KERN_ERR "Failed to ioremap\n");
  68                 return -EIO;
  69         }
  70
  71         mymtd = do_map_probe("cfi_probe", &r8610_map);
  72         if (!mymtd) {
  73                 iounmap(r8610_map.virt);
  74                 return -ENXIO;
  75         }
  76         mymtd->owner = THIS_MODULE;
  77
  78         add_mtd_partitions(mymtd, parts, nb_parts);
  79
  80         return 0;
  81 }
  82
  83 static void __exit r8610_mtd_cleanup(void)
  84 {
  85         if (mymtd) {
  86                 del_mtd_partitions(mymtd);
  87                 map_destroy(mymtd);
  88                 iounmap(r8610_map.virt);
  89         }
  90 }
  91
  92 module_init(r8610_mtd_init);
  93 module_exit(r8610_mtd_cleanup);
  94
  95 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
  96 MODULE_DESCRIPTION("RDC R8610 MTD driver");
  97 MODULE_LICENSE("GPL");