1/*
2 *  Copyright �� 2001 Flaga hf. Medical Devices, K��ri Dav����sson <kd@flaga.is>
3 *
4 *  $Id: cfi_flagadm.c,v 1.1.1.1 2007/08/03 18:52:43 Exp $
5 *
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.
10 *
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.
21 *
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.
25 */
26
27#include <linux/module.h>
28#include <linux/types.h>
29#include <linux/kernel.h>
30#include <linux/init.h>
31#include <asm/io.h>
32#include <linux/mtd/mtd.h>
33#include <linux/mtd/map.h>
34#include <linux/mtd/partitions.h>
35
36
37/* We split the flash chip up into four parts.
38 * 1: bootloader firts 128k			(0x00000000 - 0x0001FFFF) size 0x020000
39 * 2: kernel 640k					(0x00020000 - 0x000BFFFF) size 0x0A0000
40 * 3: compressed 1536k root ramdisk	(0x000C0000 - 0x0023FFFF) size 0x180000
41 * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000
42 */
43
44#define FLASH_PHYS_ADDR 0x40000000
45#define FLASH_SIZE 0x400000
46
47#define FLASH_PARTITION0_ADDR 0x00000000
48#define FLASH_PARTITION0_SIZE 0x00020000
49
50#define FLASH_PARTITION1_ADDR 0x00020000
51#define FLASH_PARTITION1_SIZE 0x000A0000
52
53#define FLASH_PARTITION2_ADDR 0x000C0000
54#define FLASH_PARTITION2_SIZE 0x00180000
55
56#define FLASH_PARTITION3_ADDR 0x00240000
57#define FLASH_PARTITION3_SIZE 0x001C0000
58
59
60struct map_info flagadm_map = {
61		.name =		"FlagaDM flash device",
62		.size =		FLASH_SIZE,
63		.bankwidth =	2,
64};
65
66struct mtd_partition flagadm_parts[] = {
67	{
68		.name =		"Bootloader",
69		.offset	=	FLASH_PARTITION0_ADDR,
70		.size =		FLASH_PARTITION0_SIZE
71	},
72	{
73		.name =		"Kernel image",
74		.offset =	FLASH_PARTITION1_ADDR,
75		.size =		FLASH_PARTITION1_SIZE
76	},
77	{
78		.name =		"Initial ramdisk image",
79		.offset =	FLASH_PARTITION2_ADDR,
80		.size =		FLASH_PARTITION2_SIZE
81	},
82	{
83		.name =		"Persistent storage",
84		.offset =	FLASH_PARTITION3_ADDR,
85		.size =		FLASH_PARTITION3_SIZE
86	}
87};
88
89#define PARTITION_COUNT ARRAY_SIZE(flagadm_parts)
90
91static struct mtd_info *mymtd;
92
93int __init init_flagadm(void)
94{
95	printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n",
96			FLASH_SIZE, FLASH_PHYS_ADDR);
97
98	flagadm_map.phys = FLASH_PHYS_ADDR;
99	flagadm_map.virt = ioremap(FLASH_PHYS_ADDR,
100					FLASH_SIZE);
101
102	if (!flagadm_map.virt) {
103		printk("Failed to ioremap\n");
104		return -EIO;
105	}
106
107	simple_map_init(&flagadm_map);
108
109	mymtd = do_map_probe("cfi_probe", &flagadm_map);
110	if (mymtd) {
111		mymtd->owner = THIS_MODULE;
112		add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT);
113		printk(KERN_NOTICE "FlagaDM flash device initialized\n");
114		return 0;
115	}
116
117	iounmap((void *)flagadm_map.virt);
118	return -ENXIO;
119}
120
121static void __exit cleanup_flagadm(void)
122{
123	if (mymtd) {
124		del_mtd_partitions(mymtd);
125		map_destroy(mymtd);
126	}
127	if (flagadm_map.virt) {
128		iounmap((void *)flagadm_map.virt);
129		flagadm_map.virt = 0;
130	}
131}
132
133module_init(init_flagadm);
134module_exit(cleanup_flagadm);
135
136
137MODULE_LICENSE("GPL");
138MODULE_AUTHOR("K��ri Dav����sson <kd@flaga.is>");
139MODULE_DESCRIPTION("MTD map driver for Flaga digital module");
140