LXR linux/drivers/mtd/maps/dbox2-flash.c

   1/*
   2 * D-Box 2 flash driver
   3 */
   4
   5#include <linux/module.h>
   6#include <linux/types.h>
   7#include <linux/kernel.h>
   8#include <linux/init.h>
   9#include <asm/io.h>
  10#include <linux/mtd/mtd.h>
  11#include <linux/mtd/map.h>
  12#include <linux/mtd/partitions.h>
  13#include <linux/errno.h>
  14
  15/* partition_info gives details on the logical partitions that the split the
  16 * single flash device into. If the size if zero we use up to the end of the
  17 * device. */
  18static struct mtd_partition partition_info[]= {
  19        {
  20        .name           = "BR bootloader",
  21        .size           = 128 * 1024,
  22        .offset         = 0,
  23        .mask_flags     = MTD_WRITEABLE
  24        },
  25        {
  26        .name           = "FLFS (U-Boot)",
  27        .size           = 128 * 1024,
  28        .offset         = MTDPART_OFS_APPEND,
  29        .mask_flags     = 0
  30        },
  31        {
  32        .name           = "Root (SquashFS)",
  33        .size           = 7040 * 1024,
  34        .offset         = MTDPART_OFS_APPEND,
  35        .mask_flags     = 0
  36        },
  37        {
  38        .name           = "var (JFFS2)",
  39        .size           = 896 * 1024,
  40        .offset         = MTDPART_OFS_APPEND,
  41        .mask_flags     = 0
  42        },
  43        {
  44        .name           = "Flash without bootloader",
  45        .size           = MTDPART_SIZ_FULL,
  46        .offset         = 128 * 1024,
  47        .mask_flags     = 0
  48        },
  49        {
  50        .name           = "Complete Flash",
  51        .size           = MTDPART_SIZ_FULL,
  52        .offset         = 0,
  53        .mask_flags     = MTD_WRITEABLE
  54        }
  55};
  56
  57#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
  58
  59#define WINDOW_ADDR 0x10000000
  60#define WINDOW_SIZE 0x800000
  61
  62static struct mtd_info *mymtd;
  63
  64
  65struct map_info dbox2_flash_map = {
  66        .name           = "D-Box 2 flash memory",
  67        .size           = WINDOW_SIZE,
  68        .bankwidth      = 4,
  69        .phys           = WINDOW_ADDR,
  70};
  71
  72static int __init init_dbox2_flash(void)
  73{
  74        printk(KERN_NOTICE "D-Box 2 flash driver (size->0x%X mem->0x%X)\n", WINDOW_SIZE, WINDOW_ADDR);
  75        dbox2_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
  76
  77        if (!dbox2_flash_map.virt) {
  78                printk("Failed to ioremap\n");
  79                return -EIO;
  80        }
  81        simple_map_init(&dbox2_flash_map);
  82
  83        // Probe for dual Intel 28F320 or dual AMD
  84        mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
  85        if (!mymtd) {
  86            // Probe for single Intel 28F640
  87            dbox2_flash_map.bankwidth = 2;
  88
  89            mymtd = do_map_probe("cfi_probe", &dbox2_flash_map);
  90        }
  91
  92        if (mymtd) {
  93                mymtd->owner = THIS_MODULE;
  94
  95                /* Create MTD devices for each partition. */
  96                add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
  97
  98                return 0;
  99        }
 100
 101        iounmap((void *)dbox2_flash_map.virt);
 102        return -ENXIO;
 103}
 104
 105static void __exit cleanup_dbox2_flash(void)
 106{
 107        if (mymtd) {
 108                del_mtd_partitions(mymtd);
 109                map_destroy(mymtd);
 110        }
 111        if (dbox2_flash_map.virt) {
 112                iounmap((void *)dbox2_flash_map.virt);
 113                dbox2_flash_map.virt = 0;
 114        }
 115}
 116
 117module_init(init_dbox2_flash);
 118module_exit(cleanup_dbox2_flash);
 119
 120
 121MODULE_LICENSE("GPL");
 122MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>, Bastian Blank <waldi@tuxbox.org>, Alexander Wild <wild@te-elektronik.com>");
 123MODULE_DESCRIPTION("MTD map driver for D-Box 2 board");
 124