drivers/mtd/maps/em1240_ivtc.c

   1 /*
   2  *      UC-7110-LX Version 2 Flash mapping driver
   3  */
   4
   5 //#include <linux/config.h>
   6 #include <asm/arch/moxa.h>
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/ioport.h>
  12
  13 #include <linux/mtd/mtd.h>
  14 #include <linux/mtd/map.h>
  15 #include <linux/mtd/partitions.h>
  16
  17 #include <asm/io.h>
  18
  19 #define WINDOW_ADDR CONFIG_FLASH_MEM_BASE
  20 //#define WINDOW_SIZE CONFIG_FLASH_SIZE
  21 //#define WINDOW_SIZE (0x00800000*4)
  22 #define WINDOW_SIZE (0x00800000)
  23 #define UC7110_FLASH_SIZE 0x00800000
  24
  25 #define RW_PART0_OF     0x0
  26 #define RW_PART0_SZ     0x40000         /* Bootloader */
  27 #define RW_PART1_OF     (RW_PART0_OF+RW_PART0_SZ)
  28 #define RW_PART1_SZ     0x200000        /* Kernel */
  29 #define RW_PART2_OF     (RW_PART1_OF+RW_PART1_SZ)
  30 #define RW_PART2_SZ     (0x280000-RW_PART0_SZ)  /* root file system - JFFS2 */
  31 #define RW_PART3_OF     (RW_PART2_OF+RW_PART2_SZ)
  32 #define RW_PART3_SZ     (UC7110_FLASH_SIZE-RW_PART3_OF) /* user disk - JFFS2 */
  33
  34 static struct mtd_partition moxart_flash_partitions[] = {
  35         {
  36                 .name = "Bootloader",
  37                 .offset = RW_PART0_OF,
  38                 .size = RW_PART0_SZ
  39         },
  40         {
  41                 .name = "LinuxKernel",
  42                 .offset = RW_PART1_OF,
  43                 .size = RW_PART1_SZ,
  44                 //.mask_flags = MTD_WRITEABLE
  45         },
  46         {
  47                 .name = "RootFileSystem",
  48                 .offset = RW_PART2_OF,
  49                 .size = RW_PART2_SZ,
  50                 //.mask_flags = MTD_WRITEABLE
  51         },
  52         {
  53                 .name = "UserDisk",
  54                 .offset = RW_PART3_OF,
  55                 .size = RW_PART3_SZ
  56         }
  57 };
  58 struct map_info moxart_flash_map = {
  59         .name = "EM1240 FLASH",
  60         .size = WINDOW_SIZE,
  61         .bankwidth = 2,
  62         .phys = WINDOW_ADDR,
  63         .virt = IO_ADDRESS(WINDOW_ADDR),
  64 };
  65
  66
  67 #define NUM_MOXART_FLASH_PARTITIONS ARRAY_SIZE(moxart_flash_partitions)
  68
  69 static struct mtd_info *moxart_mtd;
  70
  71 int __init init_moxart_flash(void)
  72 {
  73         printk(KERN_NOTICE "moxart: flash mapping: 0x%x at 0x%x\n",
  74                         WINDOW_SIZE, WINDOW_ADDR);
  75
  76         simple_map_init(&moxart_flash_map);
  77
  78         moxart_mtd = do_map_probe("cfi_probe",&moxart_flash_map);
  79
  80         if (moxart_mtd) {
  81                 moxart_mtd->owner = THIS_MODULE;
  82                 return add_mtd_partitions(moxart_mtd,
  83                                 moxart_flash_partitions,
  84                                 NUM_MOXART_FLASH_PARTITIONS);
  85         }
  86
  87         return -ENXIO;
  88 }
  89
  90 static void __exit cleanup_moxart_flash(void)
  91 {
  92         if (moxart_mtd) {
  93                 del_mtd_partitions(moxart_mtd);
  94                 /* moved iounmap after map_destroy - armin */
  95                 map_destroy(moxart_mtd);
  96         }
  97 }
  98
  99 module_init(init_moxart_flash);
 100 module_exit(cleanup_moxart_flash);
 101
 102 MODULE_LICENSE("GPL");
 103 MODULE_AUTHOR("Jimmy_chen@moxa.com.tw");
 104 MODULE_DESCRIPTION("MTD map driver for the UC-7110-LX Version 2");