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Commit 87c146dc authored by Richard Purdie's avatar Richard Purdie Committed by Thomas Gleixner
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[MTD] NAND sharpsl.c: Add support for akita and borzoi models 



The Sharp Zaurus akita and borzoi models are large page flash devices.
This patch adds support for them to the sharpsl MTD NAND driver but
keeps the oob layout and bad block positions compatible with the Sharp
Zaurus 2.4 kernel and ROM bootloader.

Signed-off-by: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 6f6ed056

drivers/mtd/nand/sharpsl.c

+24 −3
Original line number Diff line number Diff line
@@ -3,7 +3,7 @@ 
 *

 *  Copyright (C) 2004 Richard Purdie

 *

 *  $Id: sharpsl.c,v 1.4 2005/01/23 11:09:19 rpurdie Exp $

 *  $Id: sharpsl.c,v 1.6 2005/11/03 11:36:42 rpurdie Exp $

 *

 *  Based on Sharp's NAND driver sharp_sl.c

 *
@@ -115,6 +115,23 @@ static struct nand_bbt_descr sharpsl_bbt = { 
	.pattern = scan_ff_pattern

};



static struct nand_bbt_descr sharpsl_akita_bbt = {

	.options = 0,

	.offs = 4,

	.len = 1,

	.pattern = scan_ff_pattern

};



static struct nand_oobinfo akita_oobinfo = {

	.useecc = MTD_NANDECC_AUTOPLACE,

	.eccbytes = 24,

	.eccpos = {

		0x5,  0x1,  0x2,  0x3,  0x6,  0x7,  0x15, 0x11, 

		0x12, 0x13, 0x16, 0x17, 0x25, 0x21, 0x22, 0x23, 

		0x26, 0x27, 0x35, 0x31, 0x32, 0x33, 0x36, 0x37},

	.oobfree = { {0x08, 0x09} }

};



static int

sharpsl_nand_dev_ready(struct mtd_info* mtd)

{
@@ -194,10 +211,14 @@ sharpsl_nand_init(void) 
	this->chip_delay = 15;

	/* set eccmode using hardware ECC */

	this->eccmode = NAND_ECC_HW3_256;

	this->badblock_pattern = &sharpsl_bbt;	

	if (machine_is_akita() || machine_is_borzoi()) {

		this->badblock_pattern = &sharpsl_akita_bbt;

		this->autooob = &akita_oobinfo;

	}

	this->enable_hwecc = sharpsl_nand_enable_hwecc;

	this->calculate_ecc = sharpsl_nand_calculate_ecc;

	this->correct_data = nand_correct_data;

	this->badblock_pattern = &sharpsl_bbt;



	/* Scan to find existence of the device */

	err=nand_scan(sharpsl_mtd,1);
@@ -230,7 +251,7 @@ sharpsl_nand_init(void) 
		}

	}



	if (machine_is_husky() || machine_is_borzoi()) {

	if (machine_is_husky() || machine_is_borzoi() || machine_is_akita()) {

		/* Need to use small eraseblock size for backward compatibility */

		sharpsl_mtd->flags |= MTD_NO_VIRTBLOCKS;

	}