LXR linux/drivers/mtd/maps/mpc1211.c

   1/*
   2 * Flash on MPC-1211
   3 *
   4 * $Id: mpc1211.c,v 1.4 2004/09/16 23:27:13 gleixner Exp $
   5 *
   6 * (C) 2002 Interface, Saito.K & Jeanne
   7 *
   8 * GPL'd
   9 */
  10
  11#include <linux/module.h>
  12#include <linux/types.h>
  13#include <linux/kernel.h>
  14#include <asm/io.h>
  15#include <linux/mtd/mtd.h>
  16#include <linux/mtd/map.h>
  17#include <linux/mtd/partitions.h>
  18
  19static struct mtd_info *flash_mtd;
  20static struct mtd_partition *parsed_parts;
  21
  22struct map_info mpc1211_flash_map = {
  23        .name           = "MPC-1211 FLASH",
  24        .size           = 0x80000,
  25        .bankwidth      = 1,
  26};
  27
  28static struct mtd_partition mpc1211_partitions[] = {
  29        {
  30                .name   = "IPL & ETH-BOOT",
  31                .offset = 0x00000000,
  32                .size   = 0x10000,
  33        },
  34        {
  35                .name   = "Flash FS",
  36                .offset = 0x00010000,
  37                .size   = MTDPART_SIZ_FULL,
  38        }
  39};
  40
  41static int __init init_mpc1211_maps(void)
  42{
  43        int nr_parts;
  44
  45        mpc1211_flash_map.phys = 0;
  46        mpc1211_flash_map.virt = (void __iomem *)P2SEGADDR(0);
  47
  48        simple_map_init(&mpc1211_flash_map);
  49
  50        printk(KERN_NOTICE "Probing for flash chips at 0x00000000:\n");
  51        flash_mtd = do_map_probe("jedec_probe", &mpc1211_flash_map);
  52        if (!flash_mtd) {
  53                printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
  54                return -ENXIO;
  55        }
  56        printk(KERN_NOTICE "MPC-1211: Flash at 0x%08lx\n", mpc1211_flash_map.virt & 0x1fffffff);
  57        flash_mtd->module = THIS_MODULE;
  58
  59        parsed_parts = mpc1211_partitions;
  60        nr_parts = ARRAY_SIZE(mpc1211_partitions);
  61
  62        add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
  63        return 0;
  64}
  65
  66static void __exit cleanup_mpc1211_maps(void)
  67{
  68        if (parsed_parts)
  69                del_mtd_partitions(flash_mtd);
  70        else
  71                del_mtd_device(flash_mtd);
  72        map_destroy(flash_mtd);
  73}
  74
  75module_init(init_mpc1211_maps);
  76module_exit(cleanup_mpc1211_maps);
  77
  78MODULE_LICENSE("GPL");
  79MODULE_AUTHOR("Saito.K & Jeanne <ksaito@interface.co.jp>");
  80MODULE_DESCRIPTION("MTD map driver for MPC-1211 boards. Interface");
  81