drivers/mtd/maps/uc7112.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 UC7110_FLASH_SIZE 0x00800000
  22
  23 #define RW_PART0_OF     0x0
  24 #define RW_PART0_SZ     0x40000         /* Bootloader */
  25 #define RW_PART1_OF     (RW_PART0_OF+RW_PART0_SZ)
  26 #define RW_PART1_SZ     0x200000        /* Kernel */
  27 #define RW_PART2_OF     (RW_PART1_OF+RW_PART1_SZ)
  28 #define RW_PART2_SZ     0x280000        /* root file system - JFFS2 */
  29 #define RW_PART3_OF     (RW_PART2_OF+RW_PART2_SZ)
  30 #define RW_PART3_SZ     (UC7110_FLASH_SIZE-RW_PART3_OF) /* user disk - JFFS2 */
  31
  32 static struct mtd_partition moxart_flash_partitions[] = {
  33         {
  34                 .name = "Bootloader",
  35                 .offset = RW_PART0_OF,
  36                 .size = RW_PART0_SZ
  37         },
  38         {
  39                 .name = "LinuxKernel",
  40                 .offset = RW_PART1_OF,
  41                 .size = RW_PART1_SZ,
  42                 //.mask_flags = MTD_WRITEABLE
  43         },
  44         {
  45                 .name = "RootFileSystem",
  46                 .offset = RW_PART2_OF,
  47                 .size = RW_PART2_SZ,
  48                 //.mask_flags = MTD_WRITEABLE
  49         },
  50         {
  51                 .name = "UserDisk",
  52                 .offset = RW_PART3_OF,
  53                 .size = RW_PART3_SZ
  54         }
  55 };
  56 struct map_info moxart_flash_map = {
  57         .name = "UC7112 FLASH",
  58         .size = WINDOW_SIZE,
  59         .bankwidth = 2,
  60         .phys = WINDOW_ADDR,
  61         .virt = IO_ADDRESS(WINDOW_ADDR),
  62 };
  63
  64
  65 #define NUM_MOXART_FLASH_PARTITIONS ARRAY_SIZE(moxart_flash_partitions)
  66
  67 static struct mtd_info *moxart_mtd;
  68
  69 int __init init_moxart_flash(void)
  70 {
  71         printk(KERN_NOTICE "moxart: flash mapping: 0x%x at 0x%x\n",
  72                         WINDOW_SIZE, WINDOW_ADDR);
  73
  74         simple_map_init(&moxart_flash_map);
  75
  76         moxart_mtd = do_map_probe("cfi_probe",&moxart_flash_map);
  77
  78         if (moxart_mtd) {
  79                 moxart_mtd->owner = THIS_MODULE;
  80                 return add_mtd_partitions(moxart_mtd,
  81                                 moxart_flash_partitions,
  82                                 NUM_MOXART_FLASH_PARTITIONS);
  83         }
  84
  85         return -ENXIO;
  86 }
  87
  88 static void __exit cleanup_moxart_flash(void)
  89 {
  90         if (moxart_mtd) {
  91                 del_mtd_partitions(moxart_mtd);
  92                 /* moved iounmap after map_destroy - armin */
  93                 map_destroy(moxart_mtd);
  94         }
  95 }
  96
  97 module_init(init_moxart_flash);
  98 module_exit(cleanup_moxart_flash);
  99
 100 MODULE_LICENSE("GPL");
 101 MODULE_AUTHOR("Jimmy_chen@moxa.com.tw");
 102 MODULE_DESCRIPTION("MTD map driver for the UC-7112");