arch/arm/mach-pxa/htcsable/htcsable_rom.c

   1 /*
   2  * Pseudo-device to access IPL memory.
   3  *
   4  * License: GPL
   5  *
   6  * Author: Luke Kenneth Casson Leighton, Copyright(C) 2004
   7  *
   8  * Copyright(C) 2004, Luke Kenneth Casson Leighton.
   9  *
  10  * History:
  11  *
  12  * 2004-02-19   Luke Kenneth Casson Leighton    created.
  13  *
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/dma-mapping.h>
  18 #include <linux/mtd/mtd.h>
  19 #include <linux/mtd/map.h>
  20 #include <asm/mach-types.h>
  21
  22
  23 #define FLASH_ADDR1      0x00000000
  24 #define FLASH_ADDR2      0x00000000
  25 #define WINDOW_SIZE      0x800
  26
  27 static struct map_info sable_map = {
  28                 .name =         "IPL Flash",
  29                 .size =         WINDOW_SIZE,
  30                 .phys =         FLASH_ADDR1,
  31                 .bankwidth =    4,
  32 };
  33
  34 static struct mtd_info *mymtd;
  35
  36 static int sable_rom_init (void)
  37 {
  38         int retval = 0;
  39
  40 #if defined(CONFIG_MACH_BLUEANGEL)
  41         if (! machine_is_sable() )
  42                 return -ENODEV;
  43 #endif
  44
  45         sable_map.virt = ioremap(sable_map.phys, sable_map.size);
  46         if (!sable_map.virt) {
  47                 printk(KERN_WARNING "Failed to ioremap %s\n", sable_map.name);
  48                 return -ENOMEM;
  49         }
  50         sable_map.cached = ioremap_cached(sable_map.phys, sable_map.size);
  51         if (!sable_map.cached)
  52                 printk(KERN_WARNING "Failed to ioremap cached %s\n", sable_map.name);
  53         simple_map_init(&sable_map);
  54
  55         printk(KERN_NOTICE "Probing %s at physical address 0x%08lx (%d-bit bankwidth)\n",
  56                         sable_map.name, sable_map.phys,
  57                         sable_map.bankwidth * 8);
  58
  59         mymtd = do_map_probe("cfi_probe", &sable_map);
  60         printk("mymtd=%p\n", mymtd);
  61         if (mymtd)
  62                 add_mtd_device(mymtd);
  63         return retval;
  64 }
  65
  66 static void sable_rom_exit (void)
  67 {
  68         del_mtd_device(mymtd);
  69
  70         map_destroy(mymtd);
  71         iounmap((void *)sable_map.virt);
  72         if (sable_map.cached)
  73                 iounmap(sable_map.cached);
  74 }
  75
  76 module_init (sable_rom_init);
  77 module_exit (sable_rom_exit);
  78