drivers/mtd/maps/em1220_dlin.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
  22 #define UC7110_FLASH_SIZE 0x00800000
  23
  24 #define RW_PART0_OF     0x0
  25 #define RW_PART0_SZ     0x40000         /* Bootloader */
  26 #define RW_PART1_OF     (RW_PART0_OF+RW_PART0_SZ)
  27 #define RW_PART1_SZ     0x200000        /* Kernel */
  28 #define RW_PART2_OF     (RW_PART1_OF+RW_PART1_SZ)
  29 #define RW_PART2_SZ     (0x280000-RW_PART0_SZ)  /* root file system - JFFS2 */
  30 #define RW_PART3_OF     (RW_PART2_OF+RW_PART2_SZ)
  31 #define RW_PART3_SZ     (UC7110_FLASH_SIZE-RW_PART3_OF) /* user disk - JFFS2 */
  32
  33 static struct mtd_partition moxart_flash_partitions[] = {
  34         {
  35                 .name = "Bootloader",
  36                 .offset = RW_PART0_OF,
  37                 .size = RW_PART0_SZ
  38         },
  39         {
  40                 .name = "LinuxKernel",
  41                 .offset = RW_PART1_OF,
  42                 .size = RW_PART1_SZ,
  43                 //.mask_flags = MTD_WRITEABLE
  44         },
  45         {
  46                 .name = "RootFileSystem",
  47                 .offset = RW_PART2_OF,
  48                 .size = RW_PART2_SZ,
  49                 //.mask_flags = MTD_WRITEABLE
  50         },
  51         {
  52                 .name = "UserDisk",
  53                 .offset = RW_PART3_OF,
  54                 .size = RW_PART3_SZ
  55         }
  56 };
  57 struct map_info moxart_flash_map = {
  58         .name = "EM1220 FLASH",
  59         .size = WINDOW_SIZE,
  60         .bankwidth = 2,
  61         .phys = WINDOW_ADDR,
  62         .virt = IO_ADDRESS(WINDOW_ADDR),
  63 };
  64
  65
  66 #define NUM_MOXART_FLASH_PARTITIONS ARRAY_SIZE(moxart_flash_partitions)
  67
  68 static struct mtd_info *moxart_mtd;
  69
  70 int __init init_moxart_flash(void)
  71 {
  72         printk(KERN_NOTICE "moxart: flash mapping: 0x%x at 0x%x\n",
  73                         WINDOW_SIZE, WINDOW_ADDR);
  74
  75         simple_map_init(&moxart_flash_map);
  76
  77         moxart_mtd = do_map_probe("cfi_probe",&moxart_flash_map);
  78
  79         if (moxart_mtd) {
  80                 moxart_mtd->owner = THIS_MODULE;
  81                 return add_mtd_partitions(moxart_mtd,
  82                                 moxart_flash_partitions,
  83                                 NUM_MOXART_FLASH_PARTITIONS);
  84         }
  85
  86         return -ENXIO;
  87 }
  88
  89 static void __exit cleanup_moxart_flash(void)
  90 {
  91         if (moxart_mtd) {
  92                 del_mtd_partitions(moxart_mtd);
  93                 /* moved iounmap after map_destroy - armin */
  94                 map_destroy(moxart_mtd);
  95         }
  96 }
  97
  98 module_init(init_moxart_flash);
  99 module_exit(cleanup_moxart_flash);
 100
 101 MODULE_LICENSE("GPL");
 102 MODULE_AUTHOR("Jimmy_chen@moxa.com.tw");
 103 MODULE_DESCRIPTION("MTD map driver for the EM1220-LX for DLin ODM");