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-rw-r--r--target/linux/brcm-2.4/src/jffs2root.c133
-rw-r--r--target/linux/brcm-2.4/src/mtd.h304
2 files changed, 437 insertions, 0 deletions
diff --git a/target/linux/brcm-2.4/src/jffs2root.c b/target/linux/brcm-2.4/src/jffs2root.c
new file mode 100644
index 0000000000..3562eb4624
--- /dev/null
+++ b/target/linux/brcm-2.4/src/jffs2root.c
@@ -0,0 +1,133 @@
+/*
+ * jffs2root.c
+ *
+ * Copyright (C) 2005 Mike Baker
+ *
+ * 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * $Id$
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <string.h>
+
+#include <sys/ioctl.h>
+#include "mtd.h"
+
+#define FILENAME "/dev/mtdblock/1"
+
+struct trx_header {
+ unsigned magic; /* "HDR0" */
+ unsigned len; /* Length of file including header */
+ unsigned crc32; /* 32-bit CRC from flag_version to end of file */
+ unsigned flag_version; /* 0:15 flags, 16:31 version */
+ unsigned offsets[3]; /* Offsets of partitions from start of header */
+};
+
+unsigned long *crc32;
+
+void init_crc32()
+{
+ unsigned long crc;
+ unsigned long poly = 0xEDB88320L;
+ int n, bit;
+ if ((crc32 = (unsigned long *) malloc(256 * sizeof(unsigned long))) == (void *)-1) {
+ perror("malloc");
+ exit(1);
+ }
+ for (n = 0; n < 256; n++) {
+ crc = (unsigned long) n;
+ for (bit = 0; bit < 8; bit++)
+ crc = (crc & 1) ? (poly ^ (crc >> 1)) : (crc >> 1);
+ crc32[n] = crc;
+ }
+}
+
+unsigned int crc32buf(char *buf, size_t len)
+{
+ unsigned int crc = 0xFFFFFFFF;
+ for (; len; len--, buf++)
+ crc = crc32[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+ return crc;
+}
+
+int main(int argc, char **argv)
+{
+ int fd;
+ struct mtd_info_user mtdInfo;
+ unsigned long len;
+ struct trx_header *ptr;
+ char *buf;
+
+ if (((fd = open(FILENAME, O_RDWR)) < 0)
+ || ((len = lseek(fd, 0, SEEK_END)) < 0)
+ || ((ptr = (struct trx_header *) mmap(0, len, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1))
+ || (ptr->magic != 0x30524448)) {
+ printf("Error reading trx info\n");
+ exit(-1);
+ }
+ close (fd);
+
+ if (((fd = open("/dev/mtd/1", O_RDWR)) < 0)
+ || (ioctl(fd, MEMGETINFO, &mtdInfo))) {
+ fprintf(stderr, "Could not get MTD device info from %s\n", FILENAME);
+ close(fd);
+ exit(1);
+ }
+ close(fd);
+
+ if (argc > 1 && !strcmp(argv[1],"--move")) {
+ if (ptr->offsets[2] >= ptr->len) {
+ printf("Partition already moved outside trx\n");
+ } else {
+ init_crc32();
+ ptr->offsets[2] += (mtdInfo.erasesize - 1);
+ ptr->offsets[2] &= ~(mtdInfo.erasesize - 1);
+ ptr->len = ptr->offsets[2];
+ ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
+ msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
+ printf("Partition moved; please reboot\n");
+ }
+ } else if (argc > 1 && !strcmp(argv[1], "--clean")) {
+ buf = (char *) ptr;
+ if (buf[ptr->offsets[1] - 1] == 0) {
+ init_crc32();
+ buf[ptr->offsets[1] - 1] = 1;
+ ptr->crc32 = crc32buf((void *) &(ptr->flag_version), ptr->len - offsetof(struct trx_header, flag_version));
+ msync(ptr,sizeof(struct trx_header),MS_SYNC|MS_INVALIDATE);
+ printf("Partition marked as clean\n");
+ }
+ } else {
+ int x;
+ printf(" erase: 0x%08x\n",mtdInfo.erasesize);
+ printf("=== trx ===\n");
+ printf("mapped: 0x%08x\n", (unsigned)ptr);
+ printf(" magic: 0x%08x\n", ptr->magic);
+ printf(" len: 0x%08x\n", ptr->len);
+ printf(" crc: 0x%08x\n", ptr->crc32);
+ for (x = 0; x < 3; x++)
+ printf(" offset[%d]: 0x%08x\n", x, ptr->offsets[x]);
+ }
+
+ munmap((void *) ptr, len);
+ return 0;
+}
diff --git a/target/linux/brcm-2.4/src/mtd.h b/target/linux/brcm-2.4/src/mtd.h
new file mode 100644
index 0000000000..8b83afd575
--- /dev/null
+++ b/target/linux/brcm-2.4/src/mtd.h
@@ -0,0 +1,304 @@
+
+/* $Id: mtd.h,v 1.38 2003/01/12 16:30:19 spse Exp $ */
+
+#ifndef __MTD_MTD_H__
+#define __MTD_MTD_H__
+
+#ifdef __KERNEL__
+
+#include <linux/config.h>
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/mtd/compatmac.h>
+#include <linux/notifier.h>
+#include <linux/module.h>
+#include <linux/uio.h>
+
+#endif /* __KERNEL__ */
+
+struct erase_info_user {
+ u_int32_t start;
+ u_int32_t length;
+};
+
+struct mtd_oob_buf {
+ u_int32_t start;
+ u_int32_t length;
+ unsigned char *ptr;
+};
+
+
+#define MTD_CHAR_MAJOR 90
+#define MTD_BLOCK_MAJOR 31
+#define MAX_MTD_DEVICES 16
+
+
+
+#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_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
+
+// 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
+
+struct mtd_info_user {
+ u_char type;
+ u_int32_t flags;
+ u_int32_t size; // Total size of the MTD
+ u_int32_t erasesize;
+ u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
+ u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
+ u_int32_t ecctype;
+ u_int32_t eccsize;
+};
+
+struct region_info_user {
+ u_int32_t offset; /* At which this region starts,
+ * from the beginning of the MTD */
+ u_int32_t erasesize; /* For this region */
+ u_int32_t numblocks; /* Number of blocks in this region */
+ u_int32_t regionindex;
+};
+
+#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 MEMREADDATA _IOWR('M', 9, struct mtd_oob_buf)
+#define MEMWRITEDATA _IOWR('M', 10, struct mtd_oob_buf)
+
+#ifndef __KERNEL__
+
+typedef struct mtd_info_user mtd_info_t;
+typedef struct erase_info_user erase_info_t;
+typedef struct region_info_user region_info_t;
+
+ /* User-space ioctl definitions */
+
+
+#else /* __KERNEL__ */
+
+
+#define MTD_ERASE_PENDING 0x01
+#define MTD_ERASING 0x02
+#define MTD_ERASE_SUSPEND 0x04
+#define MTD_ERASE_DONE 0x08
+#define MTD_ERASE_FAILED 0x10
+
+struct erase_info {
+ struct mtd_info *mtd;
+ u_int32_t addr;
+ u_int32_t len;
+ u_long time;
+ u_long retries;
+ u_int dev;
+ u_int cell;
+ void (*callback) (struct erase_info *self);
+ u_long priv;
+ u_char state;
+ struct erase_info *next;
+};
+
+struct mtd_erase_region_info {
+ u_int32_t offset; /* At which this region starts, from the beginning of the MTD */
+ u_int32_t erasesize; /* For this region */
+ u_int32_t numblocks; /* Number of blocks of erasesize in this region */
+};
+
+struct mtd_info {
+ u_char type;
+ u_int32_t flags;
+ u_int32_t size; // Total size of the MTD
+
+ /* "Major" erase size for the device. Naïve users may take this
+ * to be the only erase size available, or may use the more detailed
+ * information below if they desire
+ */
+ u_int32_t erasesize;
+
+ u_int32_t oobblock; // Size of OOB blocks (e.g. 512)
+ u_int32_t oobsize; // Amount of OOB data per block (e.g. 16)
+ u_int32_t ecctype;
+ u_int32_t eccsize;
+
+ // Kernel-only stuff starts here.
+ char *name;
+ int index;
+
+ /* Data for variable erase regions. If numeraseregions is zero,
+ * it means that the whole device has erasesize as given above.
+ */
+ int numeraseregions;
+ struct mtd_erase_region_info *eraseregions;
+
+ /* This really shouldn't be here. It can go away in 2.5 */
+ u_int32_t bank_size;
+
+ struct module *module;
+ int (*erase) (struct mtd_info *mtd, struct erase_info *instr);
+
+ /* This stuff for eXecute-In-Place */
+ int (*point) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char **mtdbuf);
+
+ /* We probably shouldn't allow XIP if the unpoint isn't a NULL */
+ void (*unpoint) (struct mtd_info *mtd, u_char * addr, loff_t from, size_t len);
+
+
+ int (*read) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+ int (*write) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+
+ int (*read_ecc) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf, u_char *eccbuf, int oobsel);
+ int (*write_ecc) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf, u_char *eccbuf, int oobsel);
+
+ int (*read_oob) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+ int (*write_oob) (struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen, const u_char *buf);
+
+ /*
+ * Methods to access the protection register area, present in some
+ * flash devices. The user data is one time programmable but the
+ * factory data is read only.
+ */
+ int (*read_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+
+ int (*read_fact_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+
+ /* This function is not yet implemented */
+ int (*write_user_prot_reg) (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf);
+
+ /* iovec-based read/write methods. We need these especially for NAND flash,
+ with its limited number of write cycles per erase.
+ NB: The 'count' parameter is the number of _vectors_, each of
+ which contains an (ofs, len) tuple.
+ */
+ int (*readv) (struct mtd_info *mtd, struct iovec *vecs, unsigned long count, loff_t from, size_t *retlen);
+ int (*readv_ecc) (struct mtd_info *mtd, struct iovec *vecs, unsigned long count, loff_t from,
+ size_t *retlen, u_char *eccbuf, int oobsel);
+ int (*writev) (struct mtd_info *mtd, const struct iovec *vecs, unsigned long count, loff_t to, size_t *retlen);
+ int (*writev_ecc) (struct mtd_info *mtd, const struct iovec *vecs, unsigned long count, loff_t to,
+ size_t *retlen, u_char *eccbuf, int oobsel);
+
+ /* Sync */
+ void (*sync) (struct mtd_info *mtd);
+
+ /* Chip-supported device locking */
+ int (*lock) (struct mtd_info *mtd, loff_t ofs, size_t len);
+ int (*unlock) (struct mtd_info *mtd, loff_t ofs, size_t len);
+
+ /* Power Management functions */
+ int (*suspend) (struct mtd_info *mtd);
+ void (*resume) (struct mtd_info *mtd);
+
+ struct notifier_block reboot_notifier;
+
+ void *priv;
+};
+
+
+ /* Kernel-side ioctl definitions */
+
+extern int add_mtd_device(struct mtd_info *mtd);
+extern int del_mtd_device (struct mtd_info *mtd);
+
+extern struct mtd_info *__get_mtd_device(struct mtd_info *mtd, int num);
+
+static inline struct mtd_info *get_mtd_device(struct mtd_info *mtd, int num)
+{
+ struct mtd_info *ret;
+
+ ret = __get_mtd_device(mtd, num);
+
+ if (ret && ret->module && !try_inc_mod_count(ret->module))
+ return NULL;
+
+ return ret;
+}
+
+static inline void put_mtd_device(struct mtd_info *mtd)
+{
+ if (mtd->module)
+ __MOD_DEC_USE_COUNT(mtd->module);
+}
+
+
+struct mtd_notifier {
+ void (*add)(struct mtd_info *mtd);
+ void (*remove)(struct mtd_info *mtd);
+ struct mtd_notifier *next;
+};
+
+
+extern void register_mtd_user (struct mtd_notifier *new);
+extern int unregister_mtd_user (struct mtd_notifier *old);
+
+int default_mtd_writev(struct mtd_info *mtd, const struct iovec *vecs,
+ unsigned long count, loff_t to, size_t *retlen);
+
+int default_mtd_readv(struct mtd_info *mtd, struct iovec *vecs,
+ unsigned long count, loff_t from, size_t *retlen);
+
+#ifndef MTDC
+#define MTD_ERASE(mtd, args...) (*(mtd->erase))(mtd, args)
+#define MTD_POINT(mtd, a,b,c,d) (*(mtd->point))(mtd, a,b,c, (u_char **)(d))
+#define MTD_UNPOINT(mtd, arg) (*(mtd->unpoint))(mtd, (u_char *)arg)
+#define MTD_READ(mtd, args...) (*(mtd->read))(mtd, args)
+#define MTD_WRITE(mtd, args...) (*(mtd->write))(mtd, args)
+#define MTD_READV(mtd, args...) (*(mtd->readv))(mtd, args)
+#define MTD_WRITEV(mtd, args...) (*(mtd->writev))(mtd, args)
+#define MTD_READECC(mtd, args...) (*(mtd->read_ecc))(mtd, args)
+#define MTD_WRITEECC(mtd, args...) (*(mtd->write_ecc))(mtd, args)
+#define MTD_READOOB(mtd, args...) (*(mtd->read_oob))(mtd, args)
+#define MTD_WRITEOOB(mtd, args...) (*(mtd->write_oob))(mtd, args)
+#define MTD_SYNC(mtd) do { if (mtd->sync) (*(mtd->sync))(mtd); } while (0)
+#endif /* MTDC */
+
+/*
+ * Debugging macro and defines
+ */
+#define MTD_DEBUG_LEVEL0 (0) /* Quiet */
+#define MTD_DEBUG_LEVEL1 (1) /* Audible */
+#define MTD_DEBUG_LEVEL2 (2) /* Loud */
+#define MTD_DEBUG_LEVEL3 (3) /* Noisy */
+
+#ifdef CONFIG_MTD_DEBUG
+#define DEBUG(n, args...) \
+ do { \
+ if (n <= CONFIG_MTD_DEBUG_VERBOSE) \
+ printk(KERN_INFO args); \
+ } while(0)
+#else /* CONFIG_MTD_DEBUG */
+#define DEBUG(n, args...)
+#endif /* CONFIG_MTD_DEBUG */
+
+#endif /* __KERNEL__ */
+
+#endif /* __MTD_MTD_H__ */
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