X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/f6225af7d0340d783120a010abc45282debbd60f..22a77eed08443f38b248c16497f9fade53df3a55:/target/linux/adm5120/files/drivers/mtd/trxsplit.c

diff --git a/target/linux/adm5120/files/drivers/mtd/trxsplit.c b/target/linux/adm5120/files/drivers/mtd/trxsplit.c
index ad0e25a11..49eb0f979 100644
--- a/target/linux/adm5120/files/drivers/mtd/trxsplit.c
+++ b/target/linux/adm5120/files/drivers/mtd/trxsplit.c
@@ -4,20 +4,10 @@
  *  Copyright (C) 2007 OpenWrt.org
  *  Copyright (C) Gabor Juhos <juhosg at openwrt.org>
  *
- *  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 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.
  *
- *  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., 51 Franklin Street, Fifth Floor,
- *  Boston, MA  02110-1301, USA.
  */
 
 #include <linux/module.h>
@@ -38,24 +28,24 @@
 #define TRX_MAGIC	0x30524448	/* "HDR0" */
 #define TRX_VERSION	1
 #define TRX_MAX_LEN	0x3A0000
-#define TRX_NO_HEADER	1		/* Do not write TRX header */
-#define TRX_GZ_FILES	0x2     /* Contains up to TRX_MAX_OFFSET individual gzip files */
+#define TRX_NO_HEADER	0x1	/* do not write TRX header */
+#define TRX_GZ_FILES	0x2     /* contains individual gzip files */
 #define TRX_MAX_OFFSET	3
 #define TRX_MIN_KERNEL_SIZE	256*1024
 
 struct trx_header {
-	u32 magic;		/* "HDR0" */
-	u32 len;		/* Length of file including header */
-	u32 crc32;		/* 32-bit CRC from flag_version to end of file */
-	u32 flag_version;	/* 0:15 flags, 16:31 version */
-	u32 offsets[TRX_MAX_OFFSET];	/* Offsets of partitions from start of header */
+	u32 magic;	/* "HDR0" */
+	u32 len;	/* Length of file including header */
+	u32 crc32;	/* 32-bit CRC from flag_version to end of file */
+	u32 flag_version; /* 0:15 flags, 16:31 version */
+	u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions */
 };
 
-#define BLOCK_LEN_MIN		0x10000
+#define TRX_ALIGN	0x1000
 
-static struct mtd_info *trx_mtd = NULL;
-static unsigned long trx_offset = 0;
-static int trx_nr_parts = 0;
+static int trx_nr_parts;
+static unsigned long trx_offset;
+static struct mtd_info *trx_mtd;
 static struct mtd_partition trx_parts[TRX_MAX_OFFSET];
 static struct trx_header trx_hdr;
 
@@ -66,7 +56,8 @@ static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset)
 	size_t retlen;
 	int err;
 
-	err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen, (void *)&trx_hdr);
+	err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen,
+			(void *)&trx_hdr);
 	if (err) {
 		printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name);
 		goto err_out;
@@ -103,17 +94,12 @@ err_out:
 static void trxsplit_findtrx(struct mtd_info *mtd)
 {
 	unsigned long offset;
-	unsigned long blocklen;
 	int err;
 
-	blocklen = mtd->erasesize;
-	if (blocklen < BLOCK_LEN_MIN)
-		blocklen = BLOCK_LEN_MIN;
-
 	printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name);
 
 	err = 0;
-	for (offset=0; offset < mtd->size; offset+=blocklen) {
+	for (offset = 0; offset < mtd->size; offset += TRX_ALIGN) {
 		err = trxsplit_checktrx(mtd, offset);
 		if (err == 0)
 			break;
@@ -134,7 +120,7 @@ static void trxsplit_create_partitions(struct mtd_info *mtd)
 	int err;
 	int i;
 
-	for (i=0; i<TRX_MAX_OFFSET;i++) {
+	for (i = 0; i < TRX_MAX_OFFSET; i++) {
 		part = &trx_parts[i];
 		if (trx_hdr.offsets[i] == 0)
 			continue;
@@ -142,12 +128,12 @@ static void trxsplit_create_partitions(struct mtd_info *mtd)
 		trx_nr_parts++;
 	}
 
-	for (i=0; i<trx_nr_parts-1; i++) {
+	for (i = 0; i < trx_nr_parts-1; i++)
 		trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset;
-	}
+
 	trx_parts[i].size = mtd->size - trx_parts[i].offset;
 
-	i=0;
+	i = 0;
 	part = &trx_parts[i];
 	if (part->size < TRX_MIN_KERNEL_SIZE) {
 		part->name = "loader";
@@ -191,6 +177,12 @@ err:
 
 static void __init trxsplit_add_mtd(struct mtd_info *mtd)
 {
+	if (mtd->type != MTD_NORFLASH) {
+		printk(KERN_INFO PFX "'%s' is not a NOR flash, skipped\n",
+				mtd->name);
+		return;
+	}
+
 	if (!trx_mtd)
 		trxsplit_findtrx(mtd);
 }
@@ -216,8 +208,9 @@ static int __init trxsplit_init(void)
 	trxsplit_scan();
 
 	if (trx_mtd) {
-		printk(KERN_INFO PFX "creating TRX partitions in '%s' (%d,%d)\n",
-			trx_mtd->name, MTD_BLOCK_MAJOR, trx_mtd->index);
+		printk(KERN_INFO PFX "creating TRX partitions in '%s' "
+			"(%d,%d)\n", trx_mtd->name, MTD_BLOCK_MAJOR,
+			trx_mtd->index);
 		trxsplit_create_partitions(trx_mtd);
 	}