drivers/mtd/nand: Move conditional compilation to Makefile

rename CFG_NAND_LEGACY to CONFIG_NAND_LEGACY

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

board/delta/nand.c

@@ -23,7 +23,7 @@
 #include <common.h>
 
 #if defined(CONFIG_CMD_NAND)
-#if !defined(CFG_NAND_LEGACY)
+#if !defined(CONFIG_NAND_LEGACY)
 
 #include <nand.h>
 #include <asm/arch/pxa-regs.h>

board/esd/common/auto_update.c

@@ -27,7 +27,7 @@
 #include <command.h>
 #include <image.h>
 #include <asm/byteorder.h>
-#if defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_NAND_LEGACY)
 #include <linux/mtd/nand_legacy.h>
 #endif
 #include <fat.h>
@@ -58,7 +58,7 @@ extern int flash_sect_erase(ulong, ulong);
 extern int flash_sect_protect (int, ulong, ulong);
 extern int flash_write (char *, ulong, ulong);
 
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 /* references to names in cmd_nand.c */
 #define NANDRW_READ	0x01
 #define NANDRW_WRITE	0x00
@@ -158,7 +158,7 @@ int au_do_update(int i, long sz)
 	int off, rc;
 	uint nbytes;
 	int k;
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 	int total;
 #endif
 
@@ -241,7 +241,7 @@ int au_do_update(int i, long sz)
 			debug ("flash_sect_erase(%lx, %lx);\n", start, end);
 			flash_sect_erase (start, end);
 		} else {
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 			printf ("Updating NAND FLASH with image %s\n",
 				au_image[i].name);
 			debug ("nand_legacy_erase(%lx, %lx);\n", start, end);
@@ -273,7 +273,7 @@ int au_do_update(int i, long sz)
 			rc = flash_write ((char *)addr, start,
 					  (nbytes + 1) & ~1);
 		} else {
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 			debug ("nand_legacy_rw(%p, %lx, %x)\n",
 			       addr, start, nbytes);
 			rc = nand_legacy_rw (nand_dev_desc,
@@ -298,7 +298,7 @@ int au_do_update(int i, long sz)
 			rc = crc32 (0, (uchar *)(start + off),
 				    image_get_data_size (hdr));
 		} else {
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 			rc = nand_legacy_rw (nand_dev_desc,
 					     NANDRW_READ | NANDRW_JFFS2 |
 					     NANDRW_JFFS2_SKIP,

board/netta/netta.c

@@ -555,7 +555,7 @@ int board_early_init_f(void)
 	return 0;
 }
 
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 
 #include <linux/mtd/nand_legacy.h>
 

common/cmd_jffs2.c

@@ -96,12 +96,12 @@
 #include <cramfs/cramfs_fs.h>
 
 #if defined(CONFIG_CMD_NAND)
-#ifdef CFG_NAND_LEGACY
+#ifdef CONFIG_NAND_LEGACY
 #include <linux/mtd/nand_legacy.h>
-#else /* !CFG_NAND_LEGACY */
+#else /* !CONFIG_NAND_LEGACY */
 #include <linux/mtd/nand.h>
 #include <nand.h>
-#endif /* !CFG_NAND_LEGACY */
+#endif /* !CONFIG_NAND_LEGACY */
 #endif
 /* enable/disable debugging messages */
 #define	DEBUG_JFFS
@@ -476,7 +476,7 @@ static int part_del(struct mtd_device *dev, struct part_info *part)
 		}
 	}
 
-#ifdef CFG_NAND_LEGACY
+#ifdef CONFIG_NAND_LEGACY
 	jffs2_free_cache(part);
 #endif
 	list_del(&part->link);
@@ -505,7 +505,7 @@ static void part_delall(struct list_head *head)
 	list_for_each_safe(entry, n, head) {
 		part_tmp = list_entry(entry, struct part_info, link);
 
-#ifdef CFG_NAND_LEGACY
+#ifdef CONFIG_NAND_LEGACY
 		jffs2_free_cache(part_tmp);
 #endif
 		list_del(entry);
@@ -741,7 +741,7 @@ static int device_validate(u8 type, u8 num, u32 *size)
 	} else if (type == MTD_DEV_TYPE_NAND) {
 #if defined(CONFIG_JFFS2_NAND) && defined(CONFIG_CMD_NAND)
 		if (num < CFG_MAX_NAND_DEVICE) {
-#ifndef CFG_NAND_LEGACY
+#ifndef CONFIG_NAND_LEGACY
 			*size = nand_info[num].size;
 #else
 			extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE];

common/cmd_nand.c

@@ -11,7 +11,7 @@
 #include <common.h>
 
 
-#ifndef CFG_NAND_LEGACY
+#ifndef CONFIG_NAND_LEGACY
 /*
  *
  * New NAND support
@@ -667,7 +667,7 @@ U_BOOT_CMD(nboot, 4, 1, do_nandboot,
 
 #endif
 
-#else /* CFG_NAND_LEGACY */
+#else /* CONFIG_NAND_LEGACY */
 /*
  *
  * Legacy NAND support - to be phased out
@@ -1077,4 +1077,4 @@ U_BOOT_CMD(
 
 #endif
 
-#endif /* CFG_NAND_LEGACY */
+#endif /* CONFIG_NAND_LEGACY */

cpu/arm920t/s3c24x0/nand.c

@@ -27,7 +27,7 @@
 #endif
 
 #if defined(CONFIG_CMD_NAND)
-#if !defined(CFG_NAND_LEGACY)
+#if !defined(CONFIG_NAND_LEGACY)
 
 #include <nand.h>
 #include <s3c2410.h>

cpu/arm926ejs/davinci/nand.c

@@ -45,7 +45,7 @@
 #include <asm/io.h>
 
 #ifdef CFG_USE_NAND
-#if !defined(CFG_NAND_LEGACY)
+#if !defined(CONFIG_NAND_LEGACY)
 
 #include <nand.h>
 #include <asm/arch/nand_defs.h>

cpu/ppc4xx/ndfc.c

@@ -31,7 +31,7 @@
 
 #include <common.h>
 
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY) && \
+#if defined(CONFIG_CMD_NAND) && !defined(CONFIG_NAND_LEGACY) && \
 	(defined(CONFIG_440EP) || defined(CONFIG_440GR) ||	     \
 	 defined(CONFIG_440EPX) || defined(CONFIG_440GRX) ||	     \
 	 defined(CONFIG_405EZ) || defined(CONFIG_405EX) ||	     \

doc/README.nand

@@ -184,7 +184,7 @@ We now use a complete rewrite of the NAND code based on what is in
 The old NAND handling code has been re-factored and is now confined
 to only board-specific files and - unfortunately - to the DoC code
 (see below). A new configuration variable has been introduced:
-CFG_NAND_LEGACY, which has to be defined in the board config file if
+CONFIG_NAND_LEGACY, which has to be defined in the board config file if
 that board uses legacy code.
 
 The necessary changes have been made to all affected boards, and no

drivers/mtd/nand/Makefile

@@ -25,15 +25,19 @@ include $(TOPDIR)/config.mk
 
 LIB	:= $(obj)libnand.a
 
+ifdef CONFIG_CMD_NAND
+ifndef CONFIG_NAND_LEGACY
 COBJS-y += nand.o
 COBJS-y += nand_base.o
-COBJS-y += nand_ids.o
-COBJS-y += nand_ecc.o
 COBJS-y += nand_bbt.o
+COBJS-y += nand_ecc.o
+COBJS-y += nand_ids.o
 COBJS-y += nand_util.o
+endif
 
 COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_nand.o
-COBJS-y += fsl_upm.o
+COBJS-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o
+endif
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)

drivers/mtd/nand/diskonchip.c

@@ -21,7 +21,7 @@
 
 #include <common.h>
 
-#if !defined(CFG_NAND_LEGACY)
+#if !defined(CONFIG_NAND_LEGACY)
 
 #include <linux/kernel.h>
 #include <linux/init.h>

drivers/mtd/nand/fsl_upm.c

@@ -11,8 +11,6 @@
  */
 
 #include <config.h>
-
-#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_FSL_UPM)
 #include <common.h>
 #include <asm/io.h>
 #include <asm/errno.h>
@@ -150,4 +148,3 @@ int fsl_upm_nand_init(struct nand_chip *chip, struct fsl_upm_nand *fun)
 
 	return 0;
 }
-#endif /* CONFIG_CMD_NAND */

drivers/mtd/nand/nand.c

@@ -22,9 +22,6 @@
  */
 
 #include <common.h>
-
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 #include <nand.h>
 
 #ifndef CFG_NAND_BASE_LIST
@@ -79,5 +76,3 @@ void nand_init(void)
 	board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
 #endif
 }
-
-#endif

drivers/mtd/nand/nand_base.c

@@ -59,8 +59,6 @@
 
 #define ENOTSUPP	524	/* Operation is not supported */
 
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 #include <malloc.h>
 #include <watchdog.h>
 #include <linux/err.h>
@@ -2822,6 +2820,3 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Steven J. Hill <sjhill@realitydiluted.com>, Thomas Gleixner <tglx@linutronix.de>");
 MODULE_DESCRIPTION("Generic NAND flash driver code");
 #endif
-
-#endif
-

drivers/mtd/nand/nand_bbt.c

@@ -53,9 +53,6 @@
  */
 
 #include <common.h>
-
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 #include <malloc.h>
 #include <linux/mtd/compat.h>
 #include <linux/mtd/mtd.h>
@@ -1237,5 +1234,3 @@ int nand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
 EXPORT_SYMBOL(nand_scan_bbt);
 EXPORT_SYMBOL(nand_default_bbt);
 #endif
-
-#endif

drivers/mtd/nand/nand_ecc.c

@@ -39,8 +39,6 @@
 
 #include <common.h>
 
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 /* XXX U-BOOT XXX */
 #if 0
 #include <linux/types.h>
@@ -215,5 +213,3 @@ int nand_correct_data(struct mtd_info *mtd, u_char *dat,
 #if 0
 EXPORT_SYMBOL(nand_correct_data);
 #endif
-
-#endif

drivers/mtd/nand/nand_ids.c

@@ -12,9 +12,6 @@
  */
 
 #include <common.h>
-
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 #include <linux/mtd/nand.h>
 /*
 *	Chip ID list
@@ -147,4 +144,3 @@ struct nand_manufacturers nand_manuf_ids[] = {
 	{NAND_MFR_MICRON, "Micron"},
 	{0x0, "Unknown"}
 };
-#endif

drivers/mtd/nand/nand_util.c

@@ -31,9 +31,6 @@
  */
 
 #include <common.h>
-
-#if defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY)
-
 #include <command.h>
 #include <watchdog.h>
 #include <malloc.h>
@@ -606,5 +603,3 @@ int nand_read_skip_bad(nand_info_t *nand, size_t offset, size_t *length,
 
 	return 0;
 }
-
-#endif /* defined(CONFIG_CMD_NAND) && !defined(CFG_NAND_LEGACY) */

drivers/mtd/nand_legacy/nand_legacy.c

@@ -15,7 +15,7 @@
 #include <asm/io.h>
 #include <watchdog.h>
 
-#if defined(CONFIG_CMD_NAND) && defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_CMD_NAND) && defined(CONFIG_NAND_LEGACY)
 
 #include <linux/mtd/nand_legacy.h>
 #include <linux/mtd/nand_ids.h>

fs/jffs2/jffs2_1pass.c

@@ -146,7 +146,7 @@ static struct part_info *current_part;
 
 #if (defined(CONFIG_JFFS2_NAND) && \
      defined(CONFIG_CMD_NAND) )
-#if defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_NAND_LEGACY)
 #include <linux/mtd/nand_legacy.h>
 #else
 #include <nand.h>
@@ -161,7 +161,7 @@ static struct part_info *current_part;
  *
  */
 
-#if defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_NAND_LEGACY)
 /* this one defined in nand_legacy.c */
 int read_jffs2_nand(size_t start, size_t len,
 		size_t * retlen, u_char * buf, int nanddev);
@@ -201,7 +201,7 @@ static int read_nand_cached(u32 off, u32 size, u_char *buf)
 				}
 			}
 
-#if defined(CFG_NAND_LEGACY)
+#if defined(CONFIG_NAND_LEGACY)
 			if (read_jffs2_nand(nand_cache_off, NAND_CACHE_SIZE,
 						&retlen, nand_cache, id->num) < 0 ||
 					retlen != NAND_CACHE_SIZE) {

fs/jffs2/jffs2_nand_1pass.c

@@ -1,6 +1,6 @@
 #include <common.h>
 
-#if !defined(CFG_NAND_LEGACY) && defined(CONFIG_CMD_JFFS2)
+#if !defined(CONFIG_NAND_LEGACY) && defined(CONFIG_CMD_JFFS2)
 
 #include <malloc.h>
 #include <linux/stat.h>

include/configs/BMW.h

@@ -86,7 +86,7 @@
 
 
 /* CONFIG_CMD_DOC required legacy NAND support */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #if 0
 #define CONFIG_PCI		1

include/configs/CPU87.h

@@ -191,7 +191,7 @@
 #endif
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Miscellaneous configurable options

include/configs/GEN860T.h

@@ -280,7 +280,7 @@
 #define CFG_FPGA_PROG_FEEDBACK
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Verbose help from command monitor.

include/configs/IDS8247.h

@@ -262,7 +262,7 @@
  */
 #if defined(CONFIG_CMD_NAND)
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND0_BASE 0xE1000000
 
 #define CFG_MAX_NAND_DEVICE     1       /* Max number of NAND devices           */

include/configs/MIP405.h

@@ -88,7 +88,7 @@
 #endif
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #define	 CFG_HUSH_PARSER
 #define	 CFG_PROMPT_HUSH_PS2 "> "

include/configs/NETPHONE.h

@@ -502,7 +502,7 @@
 /****************************************************************/
 
 /* NAND */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND_BASE		NAND_BASE
 #define CONFIG_MTD_NAND_ECC_JFFS2
 #define CONFIG_MTD_NAND_VERIFY_WRITE

include/configs/NETTA.h

@@ -621,7 +621,7 @@
 /****************************************************************/
 
 /* NAND */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND_BASE			NAND_BASE
 #define CONFIG_MTD_NAND_VERIFY_WRITE
 #define CONFIG_MTD_NAND_UNSAFE

include/configs/NETTA2.h

@@ -503,7 +503,7 @@
 /****************************************************************/
 
 /* NAND */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND_BASE		NAND_BASE
 #define CONFIG_MTD_NAND_ECC_JFFS2
 #define CONFIG_MTD_NAND_VERIFY_WRITE

include/configs/NETVIA.h

@@ -397,7 +397,7 @@
 
 /*****************************************************************************/
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #if defined(CONFIG_NETVIA_VERSION) && CONFIG_NETVIA_VERSION >= 2
 

include/configs/PCIPPC2.h

@@ -84,7 +84,7 @@
 #define CONFIG_PCI		1
 #define CONFIG_PCI_PNP		1	/* PCI plug-and-play */
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Miscellaneous configurable options

include/configs/PCIPPC6.h

@@ -86,7 +86,7 @@
 #define CONFIG_PCI		1
 #define CONFIG_PCI_PNP		1	/* PCI plug-and-play */
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Miscellaneous configurable options

include/configs/PIP405.h

@@ -77,7 +77,7 @@
 #define CONFIG_CMD_BSP
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #define	 CFG_HUSH_PARSER
 #define	 CFG_PROMPT_HUSH_PS2 "> "

include/configs/PM520.h

@@ -88,7 +88,7 @@
 
 #if !defined(CONFIG_BOOT_ROM)
 /* DoC requires legacy NAND for now */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #endif
 
 

include/configs/PM826.h

@@ -180,7 +180,7 @@
 #endif
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Disk-On-Chip configuration

include/configs/PM828.h

@@ -183,7 +183,7 @@
 /*
  * Disk-On-Chip configuration
  */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #define CFG_DOC_SHORT_TIMEOUT
 #define CFG_MAX_DOC_DEVICE	1	/* Max number of DOC devices	*/

include/configs/SXNI855T.h

@@ -195,7 +195,7 @@
 */
 
 /* NAND flash support */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CONFIG_MTD_NAND_ECC_JFFS2
 #define CFG_MAX_NAND_DEVICE	1	/* Max number of NAND devices	*/
 #define SECTORSIZE 512

include/configs/TQM85xx.h

@@ -345,7 +345,7 @@
 /* NAND FLASH */
 #ifdef CONFIG_NAND
 
-#undef CFG_NAND_LEGACY
+#undef CONFIG_NAND_LEGACY
 
 #define CONFIG_NAND_FSL_UPM	1
 

include/configs/VCMA9.h

@@ -254,7 +254,7 @@
  */
 #if defined(CONFIG_CMD_NAND)
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_MAX_NAND_DEVICE	1	/* Max number of NAND devices		*/
 #define SECTORSIZE 512
 

include/configs/at91rm9200dk.h

@@ -116,7 +116,7 @@
 #define CONFIG_CMD_MII
 #define CONFIG_CMD_NAND
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 #define CFG_MAX_NAND_DEVICE	1	/* Max number of NAND devices		*/
 #define SECTORSIZE 512

include/configs/delta.h

@@ -217,7 +217,7 @@
 /*
  * NAND Flash
  */
-#undef CFG_NAND_LEGACY
+#undef CONFIG_NAND_LEGACY
 
 #define CFG_NAND0_BASE		0x0 /* 0x43100040 */ /* 0x10000000 */
 #undef CFG_NAND1_BASE

include/configs/omap2420h4.h

@@ -151,7 +151,7 @@
 /*
  *  Board NAND Info.
  */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND_ADDR 0x04000000  /* physical address to access nand at CS0*/
 
 #define CFG_MAX_NAND_DEVICE 1	/* Max number of NAND devices */

include/configs/stxxtc.h

@@ -449,7 +449,7 @@
 /****************************************************************/
 
 /* NAND */
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 #define CFG_NAND_BASE		NAND_BASE
 #define CONFIG_MTD_NAND_ECC_JFFS2
 #define CONFIG_MTD_NAND_VERIFY_WRITE

include/configs/svm_sc8xx.h

@@ -151,7 +151,7 @@
 #define CONFIG_CMD_DATE
 
 
-#define CFG_NAND_LEGACY
+#define CONFIG_NAND_LEGACY
 
 /*
  * Miscellaneous configurable options

include/linux/mtd/nand_ids.h

@@ -28,7 +28,7 @@
 #ifndef __LINUX_MTD_NAND_IDS_H
 #define __LINUX_MTD_NAND_IDS_H
 
-#ifndef CFG_NAND_LEGACY
+#ifndef CONFIG_NAND_LEGACY
 #error This module is for the legacy NAND support
 #endif
 

include/linux/mtd/nand_legacy.h

@@ -36,7 +36,7 @@
 #ifndef __LINUX_MTD_NAND_LEGACY_H
 #define __LINUX_MTD_NAND_LEGACY_H
 
-#ifndef CFG_NAND_LEGACY
+#ifndef CONFIG_NAND_LEGACY
 #error This module is for the legacy NAND support
 #endif
 

include/nand.h

@@ -26,7 +26,7 @@
 
 extern void nand_init(void);
 
-#ifndef CFG_NAND_LEGACY
+#ifndef CONFIG_NAND_LEGACY
 #include <linux/mtd/compat.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
@@ -128,5 +128,5 @@ void board_nand_select_device(struct nand_chip *nand, int chip);
 
 __attribute__((noreturn)) void nand_boot(void);
 
-#endif /* !CFG_NAND_LEGACY */
+#endif /* !CONFIG_NAND_LEGACY */
 #endif

lib_generic/crc32.c

@@ -174,7 +174,7 @@ uint32_t ZEXPORT crc32 (uint32_t crc, const Bytef *buf, uInt len)
 
 #if defined(CONFIG_CMD_JFFS2) || \
 	(defined(CONFIG_CMD_NAND) \
-	&& !defined(CFG_NAND_LEGACY))
+	&& !defined(CONFIG_NAND_LEGACY))
 
 /* No ones complement version. JFFS2 (and other things ?)
  * don't use ones compliment in their CRC calculations.