drivers/mtd/maps/cobra5329.c

   1 /*
   2  * Copyright (c) 2006, emlix, Thomas Brinker <tb@emlix.com>
   3  *
   4  * Handle mapping of the flash on the COBRA5329 boards
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <asm/io.h>
  12 #include <linux/mtd/mtd.h>
  13 #include <linux/mtd/map.h>
  14 #include <linux/mtd/partitions.h>
  15
  16 #define NB_OF(x)  (sizeof(x)/sizeof(x[0]))
  17
  18 #define WINDOW_ADDR 0x00000000
  19 #define WINDOW_SIZE 0x01000000
  20
  21 static struct mtd_info *mymtd;
  22
  23 static struct map_info cobra5329_map = {
  24         .name = "COBRA5329Flash",
  25         .size = WINDOW_SIZE,
  26         .bankwidth = 2,
  27         .phys = WINDOW_ADDR,
  28 };
  29
  30 static struct mtd_partition cobra5329_partitions[] =
  31 {
  32         {
  33                 .name           = "bootloader",
  34                 .size           = 1*1024*1024,
  35                 .offset         = 0x00000000,
  36                 .mask_flags     = MTD_WRITEABLE
  37         }, {
  38                 .name           = "kernel",
  39                 .size           = 6*1024*1024,
  40                 .offset         = MTDPART_OFS_APPEND,
  41                 //.mask_flags   = MTD_WRITEABLE
  42         }, {
  43                 .name           = "data",
  44                 .size           = MTDPART_SIZ_FULL,
  45                 .offset         = MTDPART_OFS_APPEND
  46         }
  47 };
  48
  49 int __init init_cobra5329mtd(void)
  50 {
  51         printk(KERN_NOTICE "Cobra5329 flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
  52         cobra5329_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
  53 /*
  54 Because of the odd place of flash we cannot check if ioremap has succeded
  55         if (!cobra5329_map.virt) {
  56                 printk("Failed to ioremap\n");
  57                 return -EIO;
  58         }
  59 */
  60         simple_map_init(&cobra5329_map);
  61         mymtd = do_map_probe("cfi_probe", &cobra5329_map);
  62
  63         if (mymtd) {
  64                 mymtd->owner = THIS_MODULE;
  65                 add_mtd_partitions(mymtd, cobra5329_partitions, NB_OF(cobra5329_partitions));
  66                 return 0;
  67         } else
  68                 printk("%s: do_map_probe() returned 0\n",__FUNCTION__);
  69
  70 //      iounmap((void *)cobra5329_map.virt);
  71         return -ENXIO;
  72 }
  73
  74 static void __exit cleanup_cobra5329mtd(void)
  75 {
  76         if (mymtd) {
  77                 del_mtd_device(mymtd);
  78                 map_destroy(mymtd);
  79         }
  80         if (cobra5329_map.virt) {
  81                 iounmap((void *)cobra5329_map.virt);
  82                 cobra5329_map.virt = 0;
  83         }
  84 }
  85
  86 module_init(init_cobra5329mtd);
  87 module_exit(cleanup_cobra5329mtd);
  88
  89 MODULE_LICENSE("GPL");
  90 MODULE_AUTHOR("Thomas Brinker <tb@emlix.com>");
  91 MODULE_DESCRIPTION("MTD map driver for Cobra5329 boards");