drivers/mtd/maps/dbox2-flash.c

   1 /*
   2  * $Id: dbox2-flash.c,v 1.11 2004/07/12 21:59:43 dwmw2 Exp $
   3  *
   4  * D-Box 2 flash driver
   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 #include <linux/config.h>
  16 #include <linux/errno.h>
  17
  18 /* partition_info gives details on the logical partitions that the split the
  19  * single flash device into. If the size if zero we use up to the end of the
  20  * device. */
  21 static struct mtd_partition partition_info[]= {
  22         {
  23         .name           = "BR bootloader",
  24         .size           = 128 * 1024,
  25         .offset         = 0,
  26         .mask_flags     = MTD_WRITEABLE
  27         },
  28         {
  29         .name           = "FLFS (U-Boot)",
  30         .size           = 128 * 1024,
  31         .offset         = MTDPART_OFS_APPEND,
  32         .mask_flags     = 0
  33         },
  34         {
  35         .name           = "Root (SquashFS)",
  36         .size           = 7040 * 1024,
  37         .offset         = MTDPART_OFS_APPEND,
  38         .mask_flags     = 0
  39         },
  40         {
  41         .name           = "var (JFFS2)",
  42         .size           = 896 * 1024,
  43         .offset         = MTDPART_OFS_APPEND,
  44         .mask_flags     = 0
  45         },
  46         {
  47         .name           = "Flash without bootloader",
  48         .size           = MTDPART_SIZ_FULL,
  49         .offset         = 128 * 1024,
  50         .mask_flags     = 0
  51         },
  52         {
  53         .name           = "Complete Flash",
  54         .size           = MTDPART_SIZ_FULL,
  55         .offset         = 0,
  56         .mask_flags     = MTD_WRITEABLE
  57         }
  58 };
  59
  60 #define NUM_PARTITIONS (sizeof(partition_info) / sizeof(partition_info[0]))
  61
  62 #define WINDOW_ADDR 0x10000000
  63 #define WINDOW_SIZE 0x800000
  64
  65 static struct mtd_info *mymtd;
  66
  67
  68 struct map_info dbox2_flash_map = {
  69         .name           = "D-Box 2 flash memory",
  70         .size           = WINDOW_SIZE,
  71         .bankwidth      = 4,
  72         .phys           = WINDOW_ADDR,
  73 };
  74
  75 int __init init_dbox2_flash(void)
  76 {
  77         printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
  78         dbox2_flash_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
  79
  80         if (!dbox2_flash_map.virt) {
  81                 printk("Failed to ioremap\n");
  82                 return -EIO;
  83         }
  84         simple_map_init(&dbox2_flash_map);
  85
  86         // Probe for dual Intel 28F320 or dual AMD
  87         mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
  88         if (!mymtd) {
  89             // Probe for single Intel 28F640
  90             dbox2_flash_map.bankwidth = 2;
  91
  92             mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
  93         }
  94
  95         if (mymtd) {
  96                 mymtd->owner = THIS_MODULE;
  97
  98                 /* Create MTD devices for each partition. */
  99                 add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
 100
 101                 return 0;
 102         }
 103
 104         iounmap((void *)dbox2_flash_map.virt);
 105         return -ENXIO;
 106 }
 107
 108 static void __exit cleanup_dbox2_flash(void)
 109 {
 110         if (mymtd) {
 111                 del_mtd_partitions(mymtd);
 112                 map_destroy(mymtd);
 113         }
 114         if (dbox2_flash_map.virt) {
 115                 iounmap((void *)dbox2_flash_map.virt);
 116                 dbox2_flash_map.virt = 0;
 117         }
 118 }
 119
 120 module_init(init_dbox2_flash);
 121 module_exit(cleanup_dbox2_flash);
 122
 123
 124 MODULE_LICENSE("GPL");
 125 MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
 126 MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");