[U-Boot-Users] Patch for NAND Booting on SMDK2410

[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Markus Pietrek]

Hi folks,

here is a patch to enable U-Boot 1.0 to boot from NAND/SmartMedia cards. 
smdk2410.h must include the line '#define CONFIG_BOOT_NAND 1" and the 
resulting u-boot.bin must be copied to the first SmartMedia sectors (with a 
JTAG tool for example). The first sector of the SmartMedia card should also 
be marked as "Defect". With J33 and J34 closed the board should then boot 
from SmartMedia.

This first version is very simple as U-Boot is linear on the SmartMedia and 
don't allows a filesystem. Later version may include placing U-Boot on a 
filesystem.

This patch also includes code for clearing the BSS segment. This is not the 
same code Larsen submitted this morning :-(

Bye,
 
-- 
Markus Pietrek
FS Forth-Systeme GmbH
Phone: +49 (7667) 908 145,  FAX +49 (7667) 908 221

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[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Matt Matoushek]

Howdy Markus,

I've taken a look at your patch and board/smdk2410/nandboot.S appears to
be missing.  Was it your intention to add this file, have I missed
something from earlier on in the list, or will I need to create this
myself?

Thanks.

--
Matt Matoushek

-----Original Message-----
From: u-boot-users-admin@lists.sourceforge.net
[mailto:u-boot-users-admin at lists.sourceforge.net] On Behalf Of Markus
Pietrek
Sent: Friday, January 09, 2004 8:18 AM
To: u-boot-users at lists.sourceforge.net
Cc: David M?ller (ELSOFT AG)
Subject: [U-Boot-Users] Patch for NAND Booting on SMDK2410

Hi folks,

here is a patch to enable U-Boot 1.0 to boot from NAND/SmartMedia cards.

smdk2410.h must include the line '#define CONFIG_BOOT_NAND 1" and the 
resulting u-boot.bin must be copied to the first SmartMedia sectors
(with a 
JTAG tool for example). The first sector of the SmartMedia card should
also 
be marked as "Defect". With J33 and J34 closed the board should then
boot 
from SmartMedia.

This first version is very simple as U-Boot is linear on the SmartMedia
and 
don't allows a filesystem. Later version may include placing U-Boot on a

filesystem.

This patch also includes code for clearing the BSS segment. This is not
the 
same code Larsen submitted this morning :-(

Bye,
 
-- 
Markus Pietrek
FS Forth-Systeme GmbH
Phone: +49 (7667) 908 145,  FAX +49 (7667) 908 221

[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Markus Pietrek]

Hi,

> I've taken a look at your patch and board/smdk2410/nandboot.S appears to
> be missing.  Was it your intention to add this file, have I missed
> something from earlier on in the list, or will I need to create this
> myself?

Oops, sorry. As this file didn't exist originally, my "cvs diff -c -D" must 
have skipped this file. Here it is.

Bye,
-- 
Markus Pietrek
FS Forth-Systeme GmbH
Phone: +49 (7667) 908 145,  FAX +49 (7667) 908 221

-------------- next part --------------
/***********************************************************************
 *
 *  Copyright (C) 2003 by FS Forth-Systeme GmbH.
 *  All rights reserved.
 *	
 *  @Author: Markus Pietrek
 *  @Descr: Supports only 512 bytes media with no bad-block management
 *  @References: [1] S3C2410X User's Manual Rev. 1
 *	         [2] Toshiba's NAND Flash Applications Design Guide Rev. 1.0
 * 	         [3] vivi/arch/s3c2420/head.S, Rev. 1.18 (initialization)
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *	
 * 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 program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>

#ifdef CONFIG_BOOT_NAND	
.globl _nandboot

/***********************************************************************
 * @Function: _nandboot (unsigned int unStartBlock,
 *			  unsigned int* punDest, unsigned int unLength)
 * @Return: always, no error handling
 * @Descr: copies blocks from NAND to RAM (punDest) until unLength data has been
 *	   read. unStartBlock
 ***********************************************************************/

#define rNF_BASE	(0x4e000000)
#define	oNF_CONF	(0x00)
#define	oNF_CMD		(0x04)
#define oNF_ADDR	(0x08)
#define oNF_DATA	(0x0c)
#define oNF_STAT	(0x10)
#define oNF_ECC		(0x14)

#define vNF_CONF_RESET  (0xf830) /* NAND Controller enable, enable chip,
	                            TWRPH0 = 3 */ 			
_nandboot:
	ldr	r6, =0x200              @ page size
	
	mov	r3, #rNF_BASE           @ reset NAND Controller
	ldr	r4, =vNF_CONF_RESET
	str	r4, [r3, #oNF_CONF]
	
	ldr	r4, [r3, #oNF_CONF]
	bic	r4, r4, #0x800	        @ enable chip	
	str	r4, [r3, #oNF_CONF]
	
	mov	r4, #0xff		@ send reset to NAND
	strb	r4, [r3, #oNF_CMD]

	mov	r4, #0			@ wait 
1:	add	r4, r4, #0x1
	cmp	r4, #0xa
	blt	1b
	
2:	ldr	r4, [r3, #oNF_STAT]	@ wait ready
	tst	r4, #0x1
	beq	2b
	
	ldr	r4, [r3, #oNF_CONF]
	orr	r4, r4, #0x800		@ disable chip
	str	r4, [r3, #oNF_CONF]

_nandboot_read_page:	
	@ read one page
	ldr	r4, [r3, #oNF_CONF]
	bic	r4, r4, #0x800		@ enable chip
	str	r4, [r3, #oNF_CONF]

	mov	r4, #0			@ wait 
4:
	add	r4, r4, #0x1
	cmp	r4, #0xa
	blt	4b

	mov	r4, #0x0		@ READ0
	strb	r4, [r3, #oNF_CMD]

	mov	r4, r0		        @ ADDR
	strb	r4, [r3, #oNF_ADDR]
  	mov	r4, r4, lsr #9
	strb	r4, [r3, #oNF_ADDR]
  	mov	r4, r4, lsr #9
	strb	r4, [r3, #oNF_ADDR]
  	mov	r4, r4, lsr #9
	strb	r4, [r3, #oNF_ADDR]

5:
	ldr	r4, [r3, #oNF_STAT]     @ wait idle
	tst	r4, #0x1
	beq	5b

	@ copy at max 512 bytes
	@ r2 is number of bytes overall left after this copy
	@ r5 is number in page left
	cmp	r2, r6
	subge	r2, r2, r6
	movge	r5, r6
	movlt	r5, r2
	movlt	r2, #0

_nandboot_page_copy_to_mem:
	@ copy page to memory
	cmp	r5, #0
	beq	7f
	sub	r5, r5, #1

	ldrb	r4, [r3, #oNF_DATA]
	strb	r4, [r1], #1
	b	_nandboot_page_copy_to_mem
				
7:	
	ldr	r4, [r3, #oNF_CONF]
	orr	r4, r4, #0x800		@ disable chip
	str	r4, [r3, #oNF_CONF]

	cmp	r2, #0
	addne	r0, r0, r6          @ select next page
	bne	_nandboot_read_page

	@ finished, all bytes read
	mov	r4, #0
	str	r4, [r3, #oNF_CONF]     @ disable NAND Controller

	mov	pc, lr	
#endif /* CONFIG_BOOT_NAND */

[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Matt Matoushek]

Howdy Markus and u-boot users,

> Oops, sorry. As this file didn't exist originally, my "cvs diff -c -D"
> must have skipped this file. Here it is.

Thanks.  That helps.  Now I'm curious as to how you are using this new
functionality.  I am developing a platform based on the s3c2410 and have
been using U-boot (booting from NOR) as a development boot-loader since
I can easily tftp new code, file systems, etc.

For production use I have intended on using a modification of the ADAM
boot-loader provided by Samsung, mainly because CFG_CMD_NAND isn't
implemented yet in U-boot for the smdk2410.  The NAND boot patch gives
me a potential alternative.

Am I correct about status of CFG_CMD_NAND for u-boot and the smdk2410?
If I am correct, is there anyone out there working on this?
If so, would you like any help with that development?

--
Matt Matoushek

Invocon, Inc.
www.invocon.com
281-292-9903
mmatoushek at invocon.com

[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Markus Pietrek]

Hi Matt,

> Thanks.  That helps.  Now I'm curious as to how you are using this new
> functionality.  I am developing a platform based on the s3c2410 and have
> been using U-boot (booting from NOR) as a development boot-loader since
> I can easily tftp new code, file systems, etc.

We are also developing a board based on the s3c2410 but intended to use only 
NAND flash. With this patch I demonstrated that we are able to boot from it. 
But I haven't started yet to port cmd_nand.c to the s3c2410 hardware nand 
support feature. This will come up in about two months again.

cmd_nand.c though needs to be rewritten, mainly the commands NanD_Command, 
NaND_Address, nand_write_ecc, nand_read_oob etc.

Bye,

-- 
Markus Pietrek
FS Forth-Systeme GmbH
Phone: +49 (7667) 908 145,  FAX +49 (7667) 908 221

[U-Boot-Users] Patch for NAND Booting on SMDK2410

[Wolfgang Denk]

Dear Markus,

in message <200401091518.14181.maillist@fsforth.de> you wrote:
> 
> here is a patch to enable U-Boot 1.0 to boot from NAND/SmartMedia cards. 
> smdk2410.h must include the line '#define CONFIG_BOOT_NAND 1" and the 
> resulting u-boot.bin must be copied to the first SmartMedia sectors (with a 
> JTAG tool for example). The first sector of the SmartMedia card should also 
> be marked as "Defect". With J33 and J34 closed the board should then boot 
> from SmartMedia.
> 
> This first version is very simple as U-Boot is linear on the SmartMedia and 
> don't allows a filesystem. Later version may include placing U-Boot on a 
> filesystem.
> 
> This patch also includes code for clearing the BSS segment. This is not the 
> same code Larsen submitted this morning :-(

Can you please re-submit your patch after  syncing  against  the  CVS
tree?  I  checked  in Anders Larsens patch, which broke yours. Please
make sure to include nandboot.S in the new patch.

Thanks a lot.

Best regards,

Wolfgang Denk

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