r4469 - in developers/werner: . nbad

werner at docs.openmoko.org werner at docs.openmoko.org
Mon Jun 2 19:53:08 CEST 2008


Author: werner
Date: 2008-06-02 19:53:07 +0200 (Mon, 02 Jun 2008)
New Revision: 4469

Added:
   developers/werner/nbad/
   developers/werner/nbad/Makefile
   developers/werner/nbad/README
   developers/werner/nbad/mtd-abi.h
   developers/werner/nbad/nbad.c
Log:
Quick and dirty bad block information dumper. (Moved over from
svn.hxd8.internal.openmoko.org)



Added: developers/werner/nbad/Makefile
===================================================================
--- developers/werner/nbad/Makefile	                        (rev 0)
+++ developers/werner/nbad/Makefile	2008-06-02 17:53:07 UTC (rev 4469)
@@ -0,0 +1,3 @@
+CFLAGS=-Wall
+
+nbad:

Added: developers/werner/nbad/README
===================================================================
--- developers/werner/nbad/README	                        (rev 0)
+++ developers/werner/nbad/README	2008-06-02 17:53:07 UTC (rev 4469)
@@ -0,0 +1,3 @@
+nbad counts the bad eraseblocks on an MTD device and prints that number.
+If invoked with -v, nbad also prints the eraseblock number and its byte
+offset in the respective device.

Added: developers/werner/nbad/mtd-abi.h
===================================================================
--- developers/werner/nbad/mtd-abi.h	                        (rev 0)
+++ developers/werner/nbad/mtd-abi.h	2008-06-02 17:53:07 UTC (rev 4469)
@@ -0,0 +1,122 @@
+/*
+ * $Id: mtd-abi.h,v 1.14 2006/02/09 16:12:39 dwmw2 Exp $
+ *
+ * Portions of MTD ABI definition which are shared by kernel and user space
+ */
+
+#ifndef __MTD_ABI_H__
+#define __MTD_ABI_H__
+
+#ifndef __KERNEL__ /* Urgh. The whole point of splitting this out into
+		    separate files was to avoid #ifdef __KERNEL__ */
+#define __user
+#endif
+
+struct erase_info_user {
+	uint32_t start;
+	uint32_t length;
+};
+
+struct mtd_oob_buf {
+	uint32_t start;
+	uint32_t length;
+	unsigned char __user *ptr;
+};
+
+#define MTD_ABSENT		0
+#define MTD_RAM			1
+#define MTD_ROM			2
+#define MTD_NORFLASH		3
+#define MTD_NANDFLASH		4
+#define MTD_PEROM		5
+#define MTD_DATAFLASH		6
+#define MTD_BLOCK		7
+#define MTD_OTHER		14
+#define MTD_UNKNOWN		15
+
+#define MTD_CLEAR_BITS		1       // Bits can be cleared (flash)
+#define MTD_SET_BITS		2       // Bits can be set
+#define MTD_ERASEABLE		4       // Has an erase function
+#define MTD_WRITEB_WRITEABLE	8       // Direct IO is possible
+#define MTD_VOLATILE		16      // Set for RAMs
+#define MTD_XIP			32	// eXecute-In-Place possible
+#define MTD_OOB			64	// Out-of-band data (NAND flash)
+#define MTD_ECC			128	// Device capable of automatic ECC
+#define MTD_NO_VIRTBLOCKS	256	// Virtual blocks not allowed
+#define MTD_PROGRAM_REGIONS	512	// Configurable Programming Regions
+
+// Some common devices / combinations of capabilities
+#define MTD_CAP_ROM		0
+#define MTD_CAP_RAM		(MTD_CLEAR_BITS|MTD_SET_BITS|MTD_WRITEB_WRITEABLE)
+#define MTD_CAP_NORFLASH        (MTD_CLEAR_BITS|MTD_ERASEABLE)
+#define MTD_CAP_NANDFLASH       (MTD_CLEAR_BITS|MTD_ERASEABLE|MTD_OOB)
+#define MTD_WRITEABLE		(MTD_CLEAR_BITS|MTD_SET_BITS)
+
+
+// Types of automatic ECC/Checksum available
+#define MTD_ECC_NONE		0 	// No automatic ECC available
+#define MTD_ECC_RS_DiskOnChip	1	// Automatic ECC on DiskOnChip
+#define MTD_ECC_SW		2	// SW ECC for Toshiba & Samsung devices
+
+/* ECC byte placement */
+#define MTD_NANDECC_OFF		0	// Switch off ECC (Not recommended)
+#define MTD_NANDECC_PLACE	1	// Use the given placement in the structure (YAFFS1 legacy mode)
+#define MTD_NANDECC_AUTOPLACE	2	// Use the default placement scheme
+#define MTD_NANDECC_PLACEONLY	3	// Use the given placement in the structure (Do not store ecc result on read)
+#define MTD_NANDECC_AUTOPL_USR 	4	// Use the given autoplacement scheme rather than using the default
+
+/* OTP mode selection */
+#define MTD_OTP_OFF		0
+#define MTD_OTP_FACTORY		1
+#define MTD_OTP_USER		2
+
+struct mtd_info_user {
+	uint8_t type;
+	uint32_t flags;
+	uint32_t size;	 // Total size of the MTD
+	uint32_t erasesize;
+	uint32_t oobblock;  // Size of OOB blocks (e.g. 512)
+	uint32_t oobsize;   // Amount of OOB data per block (e.g. 16)
+	uint32_t ecctype;
+	uint32_t eccsize;
+};
+
+struct region_info_user {
+	uint32_t offset;		/* At which this region starts,
+					 * from the beginning of the MTD */
+	uint32_t erasesize;		/* For this region */
+	uint32_t numblocks;		/* Number of blocks in this region */
+	uint32_t regionindex;
+};
+
+struct otp_info {
+	uint32_t start;
+	uint32_t length;
+	uint32_t locked;
+};
+
+#define MEMGETINFO              _IOR('M', 1, struct mtd_info_user)
+#define MEMERASE                _IOW('M', 2, struct erase_info_user)
+#define MEMWRITEOOB             _IOWR('M', 3, struct mtd_oob_buf)
+#define MEMREADOOB              _IOWR('M', 4, struct mtd_oob_buf)
+#define MEMLOCK                 _IOW('M', 5, struct erase_info_user)
+#define MEMUNLOCK               _IOW('M', 6, struct erase_info_user)
+#define MEMGETREGIONCOUNT	_IOR('M', 7, int)
+#define MEMGETREGIONINFO	_IOWR('M', 8, struct region_info_user)
+#define MEMSETOOBSEL		_IOW('M', 9, struct nand_oobinfo)
+#define MEMGETOOBSEL		_IOR('M', 10, struct nand_oobinfo)
+#define MEMGETBADBLOCK		_IOW('M', 11, loff_t)
+#define MEMSETBADBLOCK		_IOW('M', 12, loff_t)
+#define OTPSELECT		_IOR('M', 13, int)
+#define OTPGETREGIONCOUNT	_IOW('M', 14, int)
+#define OTPGETREGIONINFO	_IOW('M', 15, struct otp_info)
+#define OTPLOCK		_IOR('M', 16, struct otp_info)
+
+struct nand_oobinfo {
+	uint32_t useecc;
+	uint32_t eccbytes;
+	uint32_t oobfree[8][2];
+	uint32_t eccpos[32];
+};
+
+#endif /* __MTD_ABI_H__ */

Added: developers/werner/nbad/nbad.c
===================================================================
--- developers/werner/nbad/nbad.c	                        (rev 0)
+++ developers/werner/nbad/nbad.c	2008-06-02 17:53:07 UTC (rev 4469)
@@ -0,0 +1,78 @@
+/*
+ *  nbad.c
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+
+#include <stdint.h>
+#include "mtd-abi.h"
+
+
+static int verbose = 0;
+
+
+static void check_device(const char *file)
+{
+    int n_bad = 0;
+    int fd;
+    struct mtd_info_user meminfo;
+    loff_t pos;
+    int n = 0, is_bad;
+
+    fd = open(file, O_RDONLY);
+    if (fd < 0) {
+	perror(file);
+	exit(1);
+    }
+    if (ioctl(fd, MEMGETINFO, &meminfo) < 0) {
+	perror("ioctl(MEMGETINFO)");
+	exit (1);
+    }
+    for (pos = 0; pos < meminfo.size; pos += meminfo.erasesize) {
+	is_bad = ioctl(fd, MEMGETBADBLOCK, &pos);
+	if (is_bad < 0) {
+	    perror("ioctl(MEMGETBADBLOCK)");
+	    exit(1);
+	}
+	if (is_bad) {
+	    if (verbose)
+		printf("%d %ld\n", n, (long) pos);
+	    n_bad++;
+	}
+	n++;
+    }
+    printf("%s %d\n", file, n_bad);
+    if (close(fd) < 0) {
+	perror("close");
+	exit(1);
+    }
+}
+
+
+static void usage(const char *name)
+{
+    fprintf(stderr, "usage; %s [-v] mtd_device ...\n", name);
+    exit(1);
+}
+
+
+int main(int argc, char *const *argv)
+{
+    int c;
+
+    while ((c = getopt(argc, argv, "v")) != EOF)
+	switch (c) {
+	    case 'v':
+		verbose++;
+		break;
+	    default:
+		usage(*argv);
+	}
+    while (optind != argc)
+	check_device(argv[optind++]);
+    return 0;
+}





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