Re: MTD on MBX860

Re: MTD on MBX860

[Steve Kranz]

> I am using linuxppc_2_4 (2.4.6) with current mtd
> support from cvs tree.  The board is with JEDEC AMD
> 29F016 x4 flash chips (8M Flash space).  Map file which
> I use for this board is attached (I use rpxlite.c and
> tqm8xxl.c (for partitioning) as reference).  The
> problem I found is that mtd says:
>
> "mtd: Failed. Cannot handle unsymetric banking"

Did you mean AMD29F160 (instead of AMD29F016)? If so,
I have a data sheet on my desk here that shows block sizes of:

  #1  8K
  #2  4K
  #3  4K
  #4  16K
  #5  32K
   ....
  #35 32K

--------------

Anton Todorov wrote:

> Hi,
>
> I am using linuxppc_2_4 (2.4.6) with current mtd support from cvs tree.
> The board is with JEDEC AMD 29F016 x4 flash chips (8M Flash space).
> Map file which I use for this board is attached (I use rpxlite.c and
> tqm8xxl.c (for partitioning) as reference).
> The problem I found is that mtd says:
>
> "mtd: Failed. Cannot handle unsymetric banking"
>
> I enabled some debug info in jedec.c (uncommenting some printks and add some)
> and found that it is looking for banked and find bank[0] is 8M bank[1] is 0M
> - realy unsymetric :)
> but I think it is linear flash.
> I worarounded it commentig one condition:
>
> --- jedec.c.orig        Tue Jul 10 10:06:41 2001
> +++ jedec.c     Tue Jul 10 10:07:41 2001
> @@ -159,7 +159,7 @@
>        are empty banks. Note, the last bank does not count here, only the
>        first banks are important. Holes on non-bank boundaries can not exist
>        due to the way the detection algorithm works. */
> -   if (priv.size < my_bank_size)
> +/*   if (priv.size < my_bank_size) */
>        my_bank_size = priv.size;
>     priv.is_banked = 0;
>     //printk("priv.size is %x, my_bank_size is %x\n",priv.size,my_bank_size);
>
> but I think it is not the right action ...
>
> now flash and partitioning(I think ) is working:
> fromm booting kernel:
> <>
> Motorola MBX flash device: 800000 at fe000000
>         MTD Part: MBX flash 4*[AMD Am29F016]
> MTD->erasesize is 40000
> MTD->size is 800000
> mtd: Giving out device 0 to MBX flash
> Creating 3 MTD partitions on "MBX flash":
> 0x00000000-0x00080000 : "MBX flash BOOT partition"
> mtd: Giving out device 1 to MBX flash BOOT partition
> 0x00080000-0x00600000 : "MBX flash DATA partition"
> mtd: Giving out device 2 to MBX flash DATA partition
> 0x00600000-0x00800000 : "MBX flash APPLICATION partition"
> mtd: Giving out device 3 to MBX flash APPLICATION partition
> <>
> sh-2.03# ./mtd_debug info /dev/mtd0
> mtd.type = MTD_NORFLASH
> mtd.flags = MTD_CAP_NORFLASH
> mtd.size = 8388608 (8M)
> mtd.erasesize = 262144 (256K)
> mtd.oobblock = 0
> mtd.oobsize = 0
> mtd.ecctype = MTD_ECC_NONE
> regions = 0
>
> sh-2.03# ./mtd_debug info /dev/mtd1
> mtd.type = MTD_NORFLASH
> mtd.flags = MTD_CAP_NORFLASH
> mtd.size = 524288 (512K)
> mtd.erasesize = 262144 (256K)
> mtd.oobblock = 0
> mtd.oobsize = 0
> mtd.ecctype = MTD_ECC_NONE
> regions = 0
>
> sh-2.03# ./mtd_debug info /dev/mtd2
> mtd.type = MTD_NORFLASH
> mtd.flags = MTD_CAP_NORFLASH
> mtd.size = 5767168 (5M)
> mtd.erasesize = 262144 (256K)
> mtd.oobblock = 0
> mtd.oobsize = 0
> mtd.ecctype = MTD_ECC_NONE
> regions = 0
>
> sh-2.03# ./mtd_debug info /dev/mtd3
> mtd.type = MTD_NORFLASH
> mtd.flags = MTD_CAP_NORFLASH
> mtd.size = 2097152 (2M)
> mtd.erasesize = 262144 (256K)
> mtd.oobblock = 0
> mtd.oobsize = 0
> mtd.ecctype = MTD_ECC_NONE
> regions = 0
>
> I managed to mount /dev/mtdblock3 as jffs and can create and delete files
> there.
>
> My question is why jedec driver find it as banked?
> maybe it is my fault in mbx860.c map file?
> My patch is not the right solution curently I will add some ifdefs
> to comment patched line when I am using MBX board.
> also I found that the einfo utility is not working on this board
> it says:
> <>
> sh-2.03# ./einfo /dev/mtd0
> Device /dev/mtd0 has 0 erase regions
> <>
> but mtd_debug util is working ass seen above.
> I have RPX Classic board with CFI AMD flash and same binary is working.
>
> comments?
>
> Best Regards,
> Anton Todorov
> Emness Technology
>
>   ------------------------------------------------------------------------
>                Name: mbx860.c
>    mbx860.c    Type: text/x-c
>            Encoding: base64

Help: MTD & SmartMedia

[Steve Kranz]

Help -- what is the best MTD approach for a guy who
wants r/w ability of an embedded SmartMedia slot of
a Linux device, but also wants the media readable/writable
when taken to a desktop Windows box?

  Should I use this combination?

  vfat + MTD + nftl("user") + nand.c("driver")

Thanks!
Steve Kranz  <skranz@ridgerun.com>
RidgeRun, Inc.

MTD on MBX860

[Anton Todorov]

[-- Attachment #1: Type: text/plain, Size: 3272 bytes --]

Hi,

I am using linuxppc_2_4 (2.4.6) with current mtd support from cvs tree.
The board is with JEDEC AMD 29F016 x4 flash chips (8M Flash space).
Map file which I use for this board is attached (I use rpxlite.c and 
tqm8xxl.c (for partitioning) as reference).
The problem I found is that mtd says:

"mtd: Failed. Cannot handle unsymetric banking"

I enabled some debug info in jedec.c (uncommenting some printks and add some) 
and found that it is looking for banked and find bank[0] is 8M bank[1] is 0M  
- realy unsymetric :)
but I think it is linear flash.
I worarounded it commentig one condition:

--- jedec.c.orig        Tue Jul 10 10:06:41 2001
+++ jedec.c     Tue Jul 10 10:07:41 2001
@@ -159,7 +159,7 @@
       are empty banks. Note, the last bank does not count here, only the
       first banks are important. Holes on non-bank boundaries can not exist
       due to the way the detection algorithm works. */
-   if (priv.size < my_bank_size)
+/*   if (priv.size < my_bank_size) */
       my_bank_size = priv.size;
    priv.is_banked = 0;
    //printk("priv.size is %x, my_bank_size is %x\n",priv.size,my_bank_size);

but I think it is not the right action ...

now flash and partitioning(I think ) is working:
fromm booting kernel:
<>
Motorola MBX flash device: 800000 at fe000000
        MTD Part: MBX flash 4*[AMD Am29F016]
MTD->erasesize is 40000
MTD->size is 800000
mtd: Giving out device 0 to MBX flash
Creating 3 MTD partitions on "MBX flash":
0x00000000-0x00080000 : "MBX flash BOOT partition"
mtd: Giving out device 1 to MBX flash BOOT partition
0x00080000-0x00600000 : "MBX flash DATA partition"
mtd: Giving out device 2 to MBX flash DATA partition
0x00600000-0x00800000 : "MBX flash APPLICATION partition"
mtd: Giving out device 3 to MBX flash APPLICATION partition
<>
sh-2.03# ./mtd_debug info /dev/mtd0
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 8388608 (8M)
mtd.erasesize = 262144 (256K)
mtd.oobblock = 0
mtd.oobsize = 0
mtd.ecctype = MTD_ECC_NONE
regions = 0
 
sh-2.03# ./mtd_debug info /dev/mtd1
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 524288 (512K)
mtd.erasesize = 262144 (256K)
mtd.oobblock = 0
mtd.oobsize = 0
mtd.ecctype = MTD_ECC_NONE
regions = 0
 
sh-2.03# ./mtd_debug info /dev/mtd2
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 5767168 (5M)
mtd.erasesize = 262144 (256K)
mtd.oobblock = 0
mtd.oobsize = 0
mtd.ecctype = MTD_ECC_NONE
regions = 0
 
sh-2.03# ./mtd_debug info /dev/mtd3
mtd.type = MTD_NORFLASH
mtd.flags = MTD_CAP_NORFLASH
mtd.size = 2097152 (2M)
mtd.erasesize = 262144 (256K)
mtd.oobblock = 0
mtd.oobsize = 0
mtd.ecctype = MTD_ECC_NONE
regions = 0

I managed to mount /dev/mtdblock3 as jffs and can create and delete files 
there.

My question is why jedec driver find it as banked?
maybe it is my fault in mbx860.c map file?
My patch is not the right solution curently I will add some ifdefs
to comment patched line when I am using MBX board.
also I found that the einfo utility is not working on this board
it says:
<>
sh-2.03# ./einfo /dev/mtd0
Device /dev/mtd0 has 0 erase regions
<>
but mtd_debug util is working ass seen above.
I have RPX Classic board with CFI AMD flash and same binary is working.

comments?

Best Regards,
Anton Todorov
Emness Technology

[-- Attachment #2: mbx860.c --]
[-- Type: text/x-c, Size: 3241 bytes --]

/*
 * $Id: mbx.c,v 1.0 2001/06/18 15:40:23 anton Exp $
 *
 * Handle mapping of the flash on MBX boards
 */

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


#define WINDOW_ADDR 0xfe000000
#define WINDOW_SIZE 0x00200000

/* Flash / Partition sizing */
#define MAX_SIZE_KiB              8192
#define BOOT_PARTITION_SIZE_KiB    512
#define KERNEL_PARTITION_SIZE_KiB 5632
#define APP_PARTITION_SIZE_KiB    2048

#define NUM_PARTITIONS 3

/* partition_info gives details on the logical partitions that the split the
 * single flash device into. If the size if zero we use up to the end of the
 * device. */
static struct mtd_partition partition_info[]={
	{ name: "MBX flash BOOT partition",
	offset: 0,
	size:   BOOT_PARTITION_SIZE_KiB*1024 },
	{ name: "MBX flash DATA partition",
	offset: BOOT_PARTITION_SIZE_KiB*1024,
	size: (KERNEL_PARTITION_SIZE_KiB)*1024 },
	{ name: "MBX flash APPLICATION partition",
	offset: (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
};
				   

static struct mtd_info *mymtd;

__u8 mbx_read8(struct map_info *map, unsigned long ofs)
{
	return readb(map->map_priv_1 + ofs);
}

__u16 mbx_read16(struct map_info *map, unsigned long ofs)
{
	return readw(map->map_priv_1 + ofs);
}

__u32 mbx_read32(struct map_info *map, unsigned long ofs)
{
	return readl(map->map_priv_1 + ofs);
}

void mbx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
	memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
}

void mbx_write8(struct map_info *map, __u8 d, unsigned long adr)
{
	writeb(d, map->map_priv_1 + adr);
}

void mbx_write16(struct map_info *map, __u16 d, unsigned long adr)
{
	writew(d, map->map_priv_1 + adr);
}

void mbx_write32(struct map_info *map, __u32 d, unsigned long adr)
{
	writel(d, map->map_priv_1 + adr);
}

void mbx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
	memcpy_toio((void *)(map->map_priv_1 + to), from, len);
}

struct map_info mbx_map = {
	name: "MBX flash",
	size: WINDOW_SIZE,
	buswidth: 4,
	read8: mbx_read8,
	read16: mbx_read16,
	read32: mbx_read32,
	copy_from: mbx_copy_from,
	write8: mbx_write8,
	write16: mbx_write16,
	write32: mbx_write32,
	copy_to: mbx_copy_to
};

#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_mbx init_module
#define cleanup_mbx cleanup_module
#endif

int __init init_mbx(void)
{
	printk(KERN_NOTICE "Motorola MBX flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
	mbx_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);

	if (!mbx_map.map_priv_1) {
		printk("Failed to ioremap\n");
		return -EIO;
	}
	mymtd = do_map_probe("jedec", &mbx_map);
	if (mymtd) {
		mymtd->module = THIS_MODULE;
		add_mtd_device(mymtd);
                add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
		return 0;
	}

	iounmap((void *)mbx_map.map_priv_1);
	return -ENXIO;
}

static void __exit cleanup_mbx(void)
{
	if (mymtd) {
		del_mtd_device(mymtd);
		map_destroy(mymtd);
	}
	if (mbx_map.map_priv_1) {
		iounmap((void *)mbx_map.map_priv_1);
		mbx_map.map_priv_1 = 0;
	}
}

module_init(init_mbx);
module_exit(cleanup_mbx);

Re: MTD on MBX860

[Anton Todorov]

On Tuesday 10 July 2001 10:49, you wrote:
> > I am using linuxppc_2_4 (2.4.6) with current mtd
> > support from cvs tree.  The board is with JEDEC AMD
> > 29F016 x4 flash chips (8M Flash space).  Map file which
> > I use for this board is attached (I use rpxlite.c and
> > tqm8xxl.c (for partitioning) as reference).  The
> > problem I found is that mtd says:
> >
> > "mtd: Failed. Cannot handle unsymetric banking"
>
> Did you mean AMD29F160 (instead of AMD29F016)? If so,
> I have a data sheet on my desk here that shows block sizes of:
>
>   #1  8K
>   #2  4K
>   #3  4K
>   #4  16K
>   #5  32K
>    ....
>   #35 32K
>

no. iIt is exactly AM29F016B-90EC and is only JEDEC compatible.

Regards,
Anton Todorov
Emness Technology

Re: Help: MTD & SmartMedia

[David Woodhouse]

skranz@ridgerun.com said:
>   Should I use this combination?
>   vfat + MTD + nftl("user") + nand.c("driver")

Using nand.c as the driver is correct. However, the SmartMedia format is 
not NFTL. It looks like there's sufficient information at 
http://www.ssfdc.or.jp/spec/english/ to implement the appropriate 
translation layer code.

--
dwmw2

Re: MTD on MBX860

[David Woodhouse]

a.todorov@emness.com said:
>  I am using linuxppc_2_4 (2.4.6) with current mtd support from cvs
> tree. The board is with JEDEC AMD 29F016 x4 flash chips (8M Flash
> space). Map file which I use for this board is attached (I use
> rpxlite.c and  tqm8xxl.c (for partitioning) as reference). The problem
> I found is that mtd says:

Thanks. May I add that map driver to CVS?

You should hopefully now find that the new jedec_probe stuff will work for 
your chips, and you don't have to use the old jedec code. 

--
dwmw2

Re: MTD on MBX860

[Anton Todorov]

[-- Attachment #1: Type: text/plain, Size: 856 bytes --]

On Thursday 08 November 2001 14:27, you wrote:
> a.todorov@emness.com said:
> >  I am using linuxppc_2_4 (2.4.6) with current mtd support from cvs
> > tree. The board is with JEDEC AMD 29F016 x4 flash chips (8M Flash
> > space). Map file which I use for this board is attached (I use
> > rpxlite.c and  tqm8xxl.c (for partitioning) as reference). The problem
> > I found is that mtd says:
>
> Thanks. May I add that map driver to CVS?

Yes it is under GPL !

I am attaching another one with more descriptive header :) 

>
> You should hopefully now find that the new jedec_probe stuff will work for
> your chips, and you don't have to use the old jedec code.

I hope it works but for the moment my work on ppc based boards is 
suspended, but I hope soon to came back to it.

> --
> dwmw2

Best Regards,
Anton Todorov
Emness Technology
http://www.emness.com

[-- Attachment #2: mbx860.c --]
[-- Type: text/x-c, Size: 3510 bytes --]

/*
 * $Id: mbx860.c,v 1.1 2001/08/11 10:43:37 anton Exp $
 *
 * Handle mapping of the flash on MBX860 boards
 *
 * Author:	Anton Todorov
 * Copyright:	(C) 2001 Emness Technology
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

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


#define WINDOW_ADDR 0xfe000000
#define WINDOW_SIZE 0x00200000

/* Flash / Partition sizing */
#define MAX_SIZE_KiB              8192
#define BOOT_PARTITION_SIZE_KiB    512
#define KERNEL_PARTITION_SIZE_KiB 5632
#define APP_PARTITION_SIZE_KiB    2048

#define NUM_PARTITIONS 3

/* partition_info gives details on the logical partitions that the split the
 * single flash device into. If the size if zero we use up to the end of the
 * device. */
static struct mtd_partition partition_info[]={
	{ name: "MBX flash BOOT partition",
	offset: 0,
	size:   BOOT_PARTITION_SIZE_KiB*1024 },
	{ name: "MBX flash DATA partition",
	offset: BOOT_PARTITION_SIZE_KiB*1024,
	size: (KERNEL_PARTITION_SIZE_KiB)*1024 },
	{ name: "MBX flash APPLICATION partition",
	offset: (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
};
				   

static struct mtd_info *mymtd;

__u8 mbx_read8(struct map_info *map, unsigned long ofs)
{
	return readb(map->map_priv_1 + ofs);
}

__u16 mbx_read16(struct map_info *map, unsigned long ofs)
{
	return readw(map->map_priv_1 + ofs);
}

__u32 mbx_read32(struct map_info *map, unsigned long ofs)
{
	return readl(map->map_priv_1 + ofs);
}

void mbx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
	memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
}

void mbx_write8(struct map_info *map, __u8 d, unsigned long adr)
{
	writeb(d, map->map_priv_1 + adr);
}

void mbx_write16(struct map_info *map, __u16 d, unsigned long adr)
{
	writew(d, map->map_priv_1 + adr);
}

void mbx_write32(struct map_info *map, __u32 d, unsigned long adr)
{
	writel(d, map->map_priv_1 + adr);
}

void mbx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
{
	memcpy_toio((void *)(map->map_priv_1 + to), from, len);
}

struct map_info mbx_map = {
	name: "MBX flash",
	size: WINDOW_SIZE,
	buswidth: 4,
	read8: mbx_read8,
	read16: mbx_read16,
	read32: mbx_read32,
	copy_from: mbx_copy_from,
	write8: mbx_write8,
	write16: mbx_write16,
	write32: mbx_write32,
	copy_to: mbx_copy_to
};

#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_mbx init_module
#define cleanup_mbx cleanup_module
#endif

int __init init_mbx(void)
{
	printk(KERN_NOTICE "Motorola MBX flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
	mbx_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);

	if (!mbx_map.map_priv_1) {
		printk("Failed to ioremap\n");
		return -EIO;
	}
	mymtd = do_map_probe("jedec", &mbx_map);
	if (mymtd) {
		mymtd->module = THIS_MODULE;
		add_mtd_device(mymtd);
                add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
		return 0;
	}

	iounmap((void *)mbx_map.map_priv_1);
	return -ENXIO;
}

static void __exit cleanup_mbx(void)
{
	if (mymtd) {
		del_mtd_device(mymtd);
		map_destroy(mymtd);
	}
	if (mbx_map.map_priv_1) {
		iounmap((void *)mbx_map.map_priv_1);
		mbx_map.map_priv_1 = 0;
	}
}

module_init(init_mbx);
module_exit(cleanup_mbx);