LXR linux/drivers/mtd/maps/ts5500

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * ts5500_flash.c -- MTD map driver for Technology Systems TS-5500 board
   4 *
   5 * Copyright (C) 2004 Sean Young <sean@mess.org>
   6 *
   7 * Note:
   8 * - In order for detection to work, jumper 3 must be set.
   9 * - Drive A and B use the resident flash disk (RFD) flash translation layer.
  10 * - If you have created your own jffs file system and the bios overwrites
  11 *   it during boot, try disabling Drive A: and B: in the boot order.
  12 */
  13
  14#include <linux/init.h>
  15#include <linux/module.h>
  16#include <linux/kernel.h>
  17#include <linux/mtd/map.h>
  18#include <linux/mtd/mtd.h>
  19#include <linux/mtd/partitions.h>
  20#include <linux/types.h>
  21
  22
  23#define WINDOW_ADDR     0x09400000
  24#define WINDOW_SIZE     0x00200000
  25
  26static struct map_info ts5500_map = {
  27        .name = "TS-5500 Flash",
  28        .size = WINDOW_SIZE,
  29        .bankwidth = 1,
  30        .phys = WINDOW_ADDR
  31};
  32
  33static const struct mtd_partition ts5500_partitions[] = {
  34        {
  35                .name = "Drive A",
  36                .offset = 0,
  37                .size = 0x0e0000
  38        },
  39        {
  40                .name = "BIOS",
  41                .offset = 0x0e0000,
  42                .size = 0x020000,
  43        },
  44        {
  45                .name = "Drive B",
  46                .offset = 0x100000,
  47                .size = 0x100000
  48        }
  49};
  50
  51#define NUM_PARTITIONS ARRAY_SIZE(ts5500_partitions)
  52
  53static struct mtd_info *mymtd;
  54
  55static int __init init_ts5500_map(void)
  56{
  57        int rc = 0;
  58
  59        ts5500_map.virt = ioremap(ts5500_map.phys, ts5500_map.size);
  60
  61        if (!ts5500_map.virt) {
  62                printk(KERN_ERR "Failed to ioremap\n");
  63                rc = -EIO;
  64                goto err2;
  65        }
  66
  67        simple_map_init(&ts5500_map);
  68
  69        mymtd = do_map_probe("jedec_probe", &ts5500_map);
  70        if (!mymtd)
  71                mymtd = do_map_probe("map_rom", &ts5500_map);
  72
  73        if (!mymtd) {
  74                rc = -ENXIO;
  75                goto err1;
  76        }
  77
  78        mymtd->owner = THIS_MODULE;
  79        mtd_device_register(mymtd, ts5500_partitions, NUM_PARTITIONS);
  80
  81        return 0;
  82
  83err1:
  84        iounmap(ts5500_map.virt);
  85err2:
  86        return rc;
  87}
  88
  89static void __exit cleanup_ts5500_map(void)
  90{
  91        if (mymtd) {
  92                mtd_device_unregister(mymtd);
  93                map_destroy(mymtd);
  94        }
  95
  96        if (ts5500_map.virt) {
  97                iounmap(ts5500_map.virt);
  98                ts5500_map.virt = NULL;
  99        }
 100}
 101
 102module_init(init_ts5500_map);
 103module_exit(cleanup_ts5500_map);
 104
 105MODULE_LICENSE("GPL");
 106MODULE_AUTHOR("Sean Young <sean@mess.org>");
 107MODULE_DESCRIPTION("MTD map driver for Technology Systems TS-5500 board");
 108
 109