2 * Copyright © 2001 Flaga hf. Medical Devices, Kári Davíðsson <kd@flaga.is>
4 * $Id: cfi_flagadm.c,v 1.7 2001/10/02 15:05:13 dwmw2 Exp $
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/kernel.h>
31 #include <linux/mtd/mtd.h>
32 #include <linux/mtd/map.h>
33 #include <linux/mtd/partitions.h>
36 /* We split the flash chip up into four parts.
37 * 1: bootloader firts 128k (0x00000000 - 0x0001FFFF) size 0x020000
38 * 2: kernel 640k (0x00020000 - 0x000BFFFF) size 0x0A0000
39 * 3: compressed 1536k root ramdisk (0x000C0000 - 0x0023FFFF) size 0x180000
40 * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000
43 #define FLASH_PHYS_ADDR 0x40000000
44 #define FLASH_SIZE 0x400000
46 #define FLASH_PARTITION0_ADDR 0x00000000
47 #define FLASH_PARTITION0_SIZE 0x00020000
49 #define FLASH_PARTITION1_ADDR 0x00020000
50 #define FLASH_PARTITION1_SIZE 0x000A0000
52 #define FLASH_PARTITION2_ADDR 0x000C0000
53 #define FLASH_PARTITION2_SIZE 0x00180000
55 #define FLASH_PARTITION3_ADDR 0x00240000
56 #define FLASH_PARTITION3_SIZE 0x001C0000
58 __u8 flagadm_read8(struct map_info *map, unsigned long ofs)
60 return __raw_readb(map->map_priv_1 + ofs);
63 __u16 flagadm_read16(struct map_info *map, unsigned long ofs)
65 return __raw_readw(map->map_priv_1 + ofs);
68 __u32 flagadm_read32(struct map_info *map, unsigned long ofs)
70 return __raw_readl(map->map_priv_1 + ofs);
73 void flagadm_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
75 memcpy_fromio(to, map->map_priv_1 + from, len);
78 void flagadm_write8(struct map_info *map, __u8 d, unsigned long adr)
80 __raw_writeb(d, map->map_priv_1 + adr);
84 void flagadm_write16(struct map_info *map, __u16 d, unsigned long adr)
86 __raw_writew(d, map->map_priv_1 + adr);
90 void flagadm_write32(struct map_info *map, __u32 d, unsigned long adr)
92 __raw_writel(d, map->map_priv_1 + adr);
96 void flagadm_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
98 memcpy_toio(map->map_priv_1 + to, from, len);
101 struct map_info flagadm_map = {
102 name: "FlagaDM flash device",
105 read8: flagadm_read8,
106 read16: flagadm_read16,
107 read32: flagadm_read32,
108 copy_from: flagadm_copy_from,
109 write8: flagadm_write8,
110 write16: flagadm_write16,
111 write32: flagadm_write32,
112 copy_to: flagadm_copy_to
115 struct mtd_partition flagadm_parts[] = {
118 offset : FLASH_PARTITION0_ADDR,
119 size : FLASH_PARTITION0_SIZE
122 name : "Kernel image",
123 offset : FLASH_PARTITION1_ADDR,
124 size : FLASH_PARTITION1_SIZE
127 name : "Initial ramdisk image",
128 offset : FLASH_PARTITION2_ADDR,
129 size : FLASH_PARTITION2_SIZE
132 name : "Persistant storage",
133 offset : FLASH_PARTITION3_ADDR,
134 size : FLASH_PARTITION3_SIZE
138 #define PARTITION_COUNT (sizeof(flagadm_parts)/sizeof(struct mtd_partition))
140 static struct mtd_info *mymtd;
142 int __init init_flagadm(void)
144 printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n",
145 FLASH_SIZE, FLASH_PHYS_ADDR);
147 flagadm_map.map_priv_1 = (unsigned long)ioremap(FLASH_PHYS_ADDR,
150 if (!flagadm_map.map_priv_1) {
151 printk("Failed to ioremap\n");
154 mymtd = do_map_probe("cfi_probe", &flagadm_map);
156 mymtd->module = THIS_MODULE;
157 add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT);
158 printk(KERN_NOTICE "FlagaDM flash device initialized\n");
162 iounmap((void *)flagadm_map.map_priv_1);
166 static void __exit cleanup_flagadm(void)
169 del_mtd_partitions(mymtd);
172 if (flagadm_map.map_priv_1) {
173 iounmap((void *)flagadm_map.map_priv_1);
174 flagadm_map.map_priv_1 = 0;
178 module_init(init_flagadm);
179 module_exit(cleanup_flagadm);
182 MODULE_LICENSE("GPL");
183 MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>");
184 MODULE_DESCRIPTION("MTD map driver for Flaga digital module");