drivers/mtd/maps/avnet5282.c

   1 /*
   2  *
   3  * Normal mappings of chips in physical memory
   4  */
   5 #include <linux/module.h>
   6 #include <linux/types.h>
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9 #include <linux/errno.h>
  10
  11 #include <linux/mtd/cfi.h>
  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 #define WINDOW_ADDR 0xff800000  // Flash Start addr.
  19 #define WINDOW_SIZE 0x00800000  // Flash Size: 8 MB
  20 #define BUSWIDTH 2
  21
  22 #define NUM_PARTITIONS (sizeof(avnet5282_partitions) / sizeof (avnet5282_partitions[0]))
  23
  24 /*************************************************************************************/
  25
  26 static struct mtd_partition avnet5282_partitions[] = {
  27         {
  28                 .name           =       "uboot (256 KB)",
  29                 .size           =       0x40000,
  30                 .offset         =       0x0,
  31                 .mask_flags     =       MTD_WRITEABLE
  32         },
  33         {
  34                 .name           =       "kernel (3 MB)",
  35                 .size           =       0x300000,
  36                 .offset         =       0x40000
  37         },
  38         {
  39                 .name           =       "rootfs (4,75 MB)",
  40                 .size           =       0x4C0000,
  41                 .offset         =       0x340000
  42         }
  43 };
  44
  45 /*************************************************************************************/
  46
  47 struct map_info avnet5282_map = {
  48         .name           =       "MCF5282 flash",
  49         .size           =       WINDOW_SIZE,
  50         .phys           =       WINDOW_ADDR,
  51         .bankwidth      =       BUSWIDTH
  52 };
  53
  54 static struct mtd_info *mymtd;
  55
  56 /*************************************************************************************/
  57
  58 static int __init init_avnet5282(void)
  59 {
  60         avnet5282_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
  61
  62         if (avnet5282_map.virt == 0) {
  63                 printk(KERN_NOTICE "Failed to ioremap FLASH memory area.\n");
  64                 return -EIO;
  65         }
  66         simple_map_init(&avnet5282_map);
  67
  68         mymtd = do_map_probe("cfi_probe", &avnet5282_map);
  69
  70         if(!mymtd){
  71                 printk(KERN_NOTICE "Flash 5282 error, can't map");
  72                 iounmap((void *)avnet5282_map.virt);
  73                 return -ENXIO;
  74         }
  75         printk(KERN_NOTICE "MCF5282 flash device: %dMiB at 0x%08x\n", mymtd->size >> 20, WINDOW_ADDR);
  76
  77         mymtd->owner = THIS_MODULE;
  78         mymtd->erasesize = 0x40000;
  79
  80         add_mtd_partitions(mymtd, avnet5282_partitions, NUM_PARTITIONS);
  81         return 0;
  82 }
  83
  84 /*************************************************************************************/
  85
  86 static void __exit cleanup_avnet5282(void)
  87 {
  88         if (mymtd) {
  89                 del_mtd_partitions(mymtd);
  90                 map_destroy(mymtd);
  91         }
  92         if (avnet5282_map.virt) {
  93                 iounmap((void *)avnet5282_map.virt);
  94                 avnet5282_map.virt = 0;
  95         }
  96         return;
  97 }
  98
  99 /*************************************************************************************/
 100
 101 module_init(init_avnet5282);
 102 module_exit(cleanup_avnet5282);
 103
 104 MODULE_AUTHOR("Daniel Alomar i Claramonte");
 105 MODULE_DESCRIPTION("Mapejat Xip Flash 28F640JA");
 106 MODULE_LICENSE("GPL");
 107
 108 /*************************************************************************************/