3 * drivers/mtd/maps/svme182.c
5 * Flash map driver for the Dy4 SVME182 board
7 * $Id: dmv182.c,v 1.6 2005/11/07 11:14:26 gleixner Exp $
9 * Copyright 2003-2004, TimeSys Corporation
11 * Based on the SVME181 flash map, by Tom Nelson, Dot4, Inc. for TimeSys Corp.
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version.
19 #include <linux/config.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/types.h>
23 #include <linux/kernel.h>
25 #include <linux/mtd/mtd.h>
26 #include <linux/mtd/map.h>
27 #include <linux/mtd/partitions.h>
28 #include <linux/errno.h>
31 * This driver currently handles only the 16MiB user flash bank 1 on the
32 * board. It does not provide access to bank 0 (contains the Dy4 FFW), bank 2
33 * (VxWorks boot), or the optional 48MiB expansion flash.
35 * scott.wood@timesys.com: On the newer boards with 128MiB flash, it
36 * now supports the first 96MiB (the boot flash bank containing FFW
37 * is excluded). The VxWorks loader is in partition 1.
40 #define FLASH_BASE_ADDR 0xf0000000
41 #define FLASH_BANK_SIZE (128*1024*1024)
43 MODULE_AUTHOR("Scott Wood, TimeSys Corporation <scott.wood@timesys.com>");
44 MODULE_DESCRIPTION("User-programmable flash device on the Dy4 SVME182 board");
45 MODULE_LICENSE("GPL");
47 static struct map_info svme182_map = {
48 .name = "Dy4 SVME182",
50 .size = 128 * 1024 * 1024
53 #define BOOTIMAGE_PART_SIZE ((6*1024*1024)-RESERVED_PART_SIZE)
55 // Allow 6MiB for the kernel
56 #define NEW_BOOTIMAGE_PART_SIZE (6 * 1024 * 1024)
57 // Allow 1MiB for the bootloader
58 #define NEW_BOOTLOADER_PART_SIZE (1024 * 1024)
59 // Use the remaining 9MiB at the end of flash for the RFS
60 #define NEW_RFS_PART_SIZE (0x01000000 - NEW_BOOTLOADER_PART_SIZE - \
61 NEW_BOOTIMAGE_PART_SIZE)
63 static struct mtd_partition svme182_partitions[] = {
64 // The Lower PABS is only 128KiB, but the partition code doesn't
65 // like partitions that don't end on the largest erase block
66 // size of the device, even if all of the erase blocks in the
67 // partition are small ones. The hardware should prevent
68 // writes to the actual PABS areas.
70 name: "Lower PABS and CPU 0 bootloader or kernel",
75 name: "Root Filesystem",
77 offset: MTDPART_OFS_NXTBLK
80 name: "CPU1 Bootloader",
82 offset: MTDPART_OFS_NXTBLK,
87 offset: MTDPART_OFS_NXTBLK
90 name: "Foundation Firmware and Upper PABS",
92 offset: MTDPART_OFS_NXTBLK,
93 mask_flags: MTD_WRITEABLE // read-only
97 static struct mtd_info *this_mtd;
99 static int __init init_svme182(void)
101 struct mtd_partition *partitions;
102 int num_parts = sizeof(svme182_partitions) / sizeof(struct mtd_partition);
104 partitions = svme182_partitions;
106 svme182_map.virt = ioremap(FLASH_BASE_ADDR, svme182_map.size);
108 if (svme182_map.virt == 0) {
109 printk("Failed to ioremap FLASH memory area.\n");
113 simple_map_init(&svme182_map);
115 this_mtd = do_map_probe("cfi_probe", &svme182_map);
118 iounmap((void *)svme182_map.virt);
122 printk(KERN_NOTICE "SVME182 flash device: %dMiB at 0x%08x\n",
123 this_mtd->size >> 20, FLASH_BASE_ADDR);
125 this_mtd->owner = THIS_MODULE;
126 add_mtd_partitions(this_mtd, partitions, num_parts);
131 static void __exit cleanup_svme182(void)
135 del_mtd_partitions(this_mtd);
136 map_destroy(this_mtd);
139 if (svme182_map.virt)
141 iounmap((void *)svme182_map.virt);
142 svme182_map.virt = 0;
148 module_init(init_svme182);
149 module_exit(cleanup_svme182);