From: Richard Purdie <rpurdie@rpsys.net>
Date: Thu, 3 Nov 2005 11:36:45 +0000 (+0000)
Subject: [MTD] NAND sharpsl.c: Add support for akita and borzoi models
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=87c146dc1a8552d7ad431a41b37ba8168e51e50e;p=linux-beck.git

[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: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/drivers/mtd/nand/sharpsl.c b/drivers/mtd/nand/sharpsl.c
index 88b5b5b40b43..6def3d33b060 100644
--- a/drivers/mtd/nand/sharpsl.c
+++ b/drivers/mtd/nand/sharpsl.c
@@ -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;
 	}