drivers/mtd/maps/uc7110.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
  28 #if (WINDOW_SIZE > 0x00800000 )
  29 #define RW_PART1_SZ     0x300000        /* Kernel */
  30 #define RW_PART2_SZ     0x400000        /* root file system use JFFS2 */
  31 #else
  32 #define RW_PART1_SZ     0x200000        /* Kernel */
  33 #define RW_PART2_SZ     (0x280000-RW_PART0_SZ)  /* root file system use JFFS2 */
  34 #endif
  35
  36 #define RW_PART2_OF     (RW_PART1_OF+RW_PART1_SZ)
  37 #define RW_PART3_OF     (RW_PART2_OF+RW_PART2_SZ)
  38 //#define RW_PART3_SZ   (UC7110_FLASH_SIZE-RW_PART3_OF) /* user disk use JFFS2 */
  39 #define RW_PART3_SZ     (WINDOW_SIZE-RW_PART3_OF)       /* user disk use JFFS2 */
  40
  41 static struct mtd_partition moxart_flash_partitions[] = {
  42         {
  43                 .name = "Bootloader",
  44                 .offset = RW_PART0_OF,
  45                 .size = RW_PART0_SZ
  46         },
  47         {
  48                 .name = "LinuxKernel",
  49                 .offset = RW_PART1_OF,
  50                 .size = RW_PART1_SZ,
  51                 //.mask_flags = MTD_WRITEABLE
  52         },
  53         {
  54                 .name = "RootFileSystem",
  55                 .offset = RW_PART2_OF,
  56                 .size = RW_PART2_SZ,
  57                 //.mask_flags = MTD_WRITEABLE
  58         },
  59         {
  60                 .name = "UserDisk",
  61                 .offset = RW_PART3_OF,
  62                 .size = RW_PART3_SZ
  63         }
  64 };
  65 struct map_info moxart_flash_map = {
  66         .name = "UC7110LX V2 FLASH",
  67         .size = WINDOW_SIZE,
  68         .bankwidth = 2,
  69         .phys = WINDOW_ADDR,
  70         .virt = IO_ADDRESS(WINDOW_ADDR),
  71 };
  72
  73
  74 #define NUM_MOXART_FLASH_PARTITIONS ARRAY_SIZE(moxart_flash_partitions)
  75
  76 static struct mtd_info *moxart_mtd;
  77
  78 int __init init_moxart_flash(void)
  79 {
  80         printk(KERN_NOTICE "moxart: flash mapping: 0x%x at 0x%x\n",
  81                         WINDOW_SIZE, WINDOW_ADDR);
  82
  83         simple_map_init(&moxart_flash_map);
  84
  85         moxart_mtd = do_map_probe("cfi_probe",&moxart_flash_map);
  86
  87         if (moxart_mtd) {
  88                 moxart_mtd->owner = THIS_MODULE;
  89                 return add_mtd_partitions(moxart_mtd,
  90                                 moxart_flash_partitions,
  91                                 NUM_MOXART_FLASH_PARTITIONS);
  92         }
  93
  94         return -ENXIO;
  95 }
  96
  97 static void __exit cleanup_moxart_flash(void)
  98 {
  99         if (moxart_mtd) {
 100                 del_mtd_partitions(moxart_mtd);
 101                 /* moved iounmap after map_destroy - armin */
 102                 map_destroy(moxart_mtd);
 103         }
 104 }
 105
 106 module_init(init_moxart_flash);
 107 module_exit(cleanup_moxart_flash);
 108
 109 MODULE_LICENSE("GPL");
 110 MODULE_AUTHOR("Jimmy_chen@moxa.com.tw");
 111 MODULE_DESCRIPTION("MTD map driver for the UC-7110-LX Version 2");