Release 4.7 drivers/mtd/maps/cfi_flagadm.c

/*
 *  Copyright © 2001 Flaga hf. Medical Devices, Kári Davíðsson <kd@flaga.is>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
 *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
 *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
 *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
 *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *  You should have received a copy of the  GNU General Public License along
 *  with this program; if not, write  to the Free Software Foundation, Inc.,
 *  675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>


/* We split the flash chip up into four parts.
 * 1: bootloader first 128k                     (0x00000000 - 0x0001FFFF) size 0x020000
 * 2: kernel 640k                                       (0x00020000 - 0x000BFFFF) size 0x0A0000
 * 3: compressed 1536k root ramdisk     (0x000C0000 - 0x0023FFFF) size 0x180000
 * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000
 */


#define FLASH_PHYS_ADDR 0x40000000

#define FLASH_SIZE 0x400000


#define FLASH_PARTITION0_ADDR 0x00000000

#define FLASH_PARTITION0_SIZE 0x00020000


#define FLASH_PARTITION1_ADDR 0x00020000

#define FLASH_PARTITION1_SIZE 0x000A0000


#define FLASH_PARTITION2_ADDR 0x000C0000

#define FLASH_PARTITION2_SIZE 0x00180000


#define FLASH_PARTITION3_ADDR 0x00240000

#define FLASH_PARTITION3_SIZE 0x001C0000



static struct map_info flagadm_map = {
		.name =		"FlagaDM flash device",
		.size =		FLASH_SIZE,
		.bankwidth =	2,
};


static struct mtd_partition flagadm_parts[] = {
	{
		.name =		"Bootloader",
		.offset	=	FLASH_PARTITION0_ADDR,
		.size =		FLASH_PARTITION0_SIZE
	},
	{
		.name =		"Kernel image",
		.offset =	FLASH_PARTITION1_ADDR,
		.size =		FLASH_PARTITION1_SIZE
	},
	{
		.name =		"Initial ramdisk image",
		.offset =	FLASH_PARTITION2_ADDR,
		.size =		FLASH_PARTITION2_SIZE
	},
	{
		.name =		"Persistent storage",
		.offset =	FLASH_PARTITION3_ADDR,
		.size =		FLASH_PARTITION3_SIZE
	}
};


#define PARTITION_COUNT ARRAY_SIZE(flagadm_parts)


static struct mtd_info *mymtd;



static int __init init_flagadm(void)
{
	printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n",
			FLASH_SIZE, FLASH_PHYS_ADDR);

	flagadm_map.phys = FLASH_PHYS_ADDR;
	flagadm_map.virt = ioremap(FLASH_PHYS_ADDR,
					FLASH_SIZE);

	if (!flagadm_map.virt) {
		printk("Failed to ioremap\n");
		return -EIO;
	}

	simple_map_init(&flagadm_map);

	mymtd = do_map_probe("cfi_probe", &flagadm_map);
	if (mymtd) {
		mymtd->owner = THIS_MODULE;
		mtd_device_register(mymtd, flagadm_parts, PARTITION_COUNT);
		printk(KERN_NOTICE "FlagaDM flash device initialized\n");
		return 0;
	}

	iounmap((void __iomem *)flagadm_map.virt);
	return -ENXIO;
}

Contributors
Person
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Commits
CommitProp
pre-git
pre-git
73
62.93%
2
25.00%
linus torvalds
linus torvalds
24
20.69%
2
25.00%
david woodhouse
david woodhouse
16
13.79%
1
12.50%
dmitri vorobiev
dmitri vorobiev
1
0.86%
1
12.50%
jingoo han
jingoo han
1
0.86%
1
12.50%
jamie iles
jamie iles
1
0.86%
1
12.50%
Total
116
100.00%
8
100.00%



static void __exit cleanup_flagadm(void)
{
	if (mymtd) {
		mtd_device_unregister(mymtd);
		map_destroy(mymtd);
	}
	if (flagadm_map.virt) {
		iounmap((void __iomem *)flagadm_map.virt);
		flagadm_map.virt = NULL;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
41
80.39%
1
20.00%
linus torvalds
linus torvalds
4
7.84%
1
20.00%
david woodhouse
david woodhouse
3
5.88%
1
20.00%
jingoo han
jingoo han
2
3.92%
1
20.00%
jamie iles
jamie iles
1
1.96%
1
20.00%
Total
51
100.00%
5
100.00%


module_init(init_flagadm);

module_exit(cleanup_flagadm);


MODULE_LICENSE("GPL");
MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>");
MODULE_DESCRIPTION("MTD map driver for Flaga digital module");
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
pre-git
pre-git
157
42.90%
3
18.75%
linus torvalds
linus torvalds
142
38.80%
2
12.50%
art haas
art haas
30
8.20%
1
6.25%
david woodhouse
david woodhouse
25
6.83%
3
18.75%
jingoo han
jingoo han
5
1.37%
1
6.25%
jamie iles
jamie iles
2
0.55%
1
6.25%
jan engelhardt
jan engelhardt
1
0.27%
1
6.25%
adrian bunk
adrian bunk
1
0.27%
1
6.25%
lucas de marchi
lucas de marchi
1
0.27%
1
6.25%
tobias klauser
tobias klauser
1
0.27%
1
6.25%
dmitri vorobiev
dmitri vorobiev
1
0.27%
1
6.25%
Total
366
100.00%
16
100.00%
  
Directory: drivers/mtd/maps

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