# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
-# $Id$
include $(TOPDIR)/rules.mk
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=mtd
-PKG_RELEASE:=8.1
+PKG_RELEASE:=8.2
PKG_BUILD_DIR := $(KERNEL_BUILD_DIR)/$(PKG_NAME)
+STAMP_PREPARED := $(STAMP_PREPARED)_$(call confvar,CONFIG_MTD_REDBOOT_PARTS)
include $(INCLUDE_DIR)/package.mk
target=$(firstword $(subst -, ,$(BOARD)))
-define Build/Compile
- $(MAKE) -C $(PKG_BUILD_DIR) \
- $(TARGET_CONFIGURE_OPTS) \
- TARGET=$(target) \
- CFLAGS="$(TARGET_CFLAGS) -Dtarget_$(target)=1 -Wall"
-endef
+MAKE_FLAGS += TARGET="$(target)"
+TARGET_CFLAGS += -Dtarget_$(target)=1 -Wall
+
+ifdef CONFIG_MTD_REDBOOT_PARTS
+ MAKE_FLAGS += FIS_SUPPORT=1
+ TARGET_CFLAGS += -DFIS_SUPPORT=1
+endif
define Package/mtd/install
$(INSTALL_DIR) $(1)/sbin
obj.brcm = trx.o
obj.brcm47xx = $(obj.brcm)
+ifdef FIS_SUPPORT
+ obj += fis.o
+endif
+
mtd: $(obj) $(obj.$(TARGET))
clean:
rm -f *.o jffs2
--- /dev/null
+/*
+ * FIS table updating code for mtd
+ *
+ * Copyright (C) 2009 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License v2
+ * 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.
+ */
+#include <sys/mman.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include "crc32.h"
+#include "mtd.h"
+#include "fis.h"
+
+struct fis_image_hdr {
+ unsigned char name[16];
+ uint32_t flash_base;
+ uint32_t mem_base;
+ uint32_t size;
+ uint32_t entry_point;
+ uint32_t data_length;
+} __attribute__((packed));
+
+struct fis_image_crc {
+ uint32_t desc;
+ uint32_t file;
+} __attribute__((packed));
+
+struct fis_image_desc {
+ struct fis_image_hdr hdr;
+ char _pad[256 - sizeof(struct fis_image_hdr) - sizeof(struct fis_image_crc)];
+ struct fis_image_crc crc;
+} __attribute__((packed));
+
+static int fis_fd = -1;
+static struct fis_image_desc *fis_desc;
+static int fis_erasesize = 0;
+
+static void
+fis_close(void)
+{
+ if (fis_desc)
+ munmap(fis_desc, fis_erasesize);
+
+ if (fis_fd >= 0)
+ close(fis_fd);
+
+ fis_fd = -1;
+ fis_desc = NULL;
+}
+
+static struct fis_image_desc *
+fis_open(void)
+{
+ struct fis_image_desc *desc;
+
+ if (fis_fd >= 0)
+ fis_close();
+
+ fis_fd = mtd_check_open("FIS directory");
+ if (fis_fd < 0)
+ goto error;
+
+ close(fis_fd);
+ fis_fd = mtd_open("FIS directory", true);
+ if (fis_fd < 0)
+ goto error;
+
+ fis_erasesize = erasesize;
+ desc = mmap(NULL, erasesize, PROT_READ|PROT_WRITE, MAP_SHARED, fis_fd, 0);
+ if (desc == MAP_FAILED)
+ goto error;
+
+ fis_desc = desc;
+ return desc;
+
+error:
+ fis_close();
+ return NULL;
+}
+
+int
+fis_validate(struct fis_part *old, int n_old, struct fis_part *new, int n_new)
+{
+ struct fis_image_desc *desc;
+ void *end;
+ int found = 0;
+ int i;
+
+ desc = fis_open();
+ if (!desc)
+ return 0;
+
+ for (i = 0; i < n_new - 1; i++) {
+ if (!new[i].size) {
+ fprintf(stderr, "FIS error: only the last partition can detect the size automatically\n");
+ i = -1;
+ goto done;
+ }
+ }
+
+ end = desc;
+ end = (char *) end + fis_erasesize;
+ while ((void *) desc < end) {
+ if (!desc->hdr.name[0] || (desc->hdr.name[0] == 0xff))
+ break;
+
+ for (i = 0; i < n_old; i++) {
+ if (!strncmp((char *) desc->hdr.name, (char *) old[i].name, sizeof(desc->hdr.name))) {
+ found++;
+ goto next;
+ }
+ }
+next:
+ desc++;
+ continue;
+ }
+
+ if (found == n_old)
+ i = 1;
+ else
+ i = -1;
+
+done:
+ fis_close();
+ return i;
+}
+
+int
+fis_remap(struct fis_part *old, int n_old, struct fis_part *new, int n_new)
+{
+ struct fis_image_desc *fisdir = NULL;
+ struct fis_image_desc *redboot = NULL;
+ struct fis_image_desc *first = NULL;
+ struct fis_image_desc *last = NULL;
+ struct fis_image_desc *desc;
+ struct fis_part *part;
+ uint32_t offset = 0, size = 0;
+ char *end, *tmp;
+ int i;
+
+ desc = fis_open();
+ if (!desc)
+ return -1;
+
+ if (!quiet)
+ fprintf(stderr, "Updating FIS table... \n");
+
+ end = (char *) desc + fis_erasesize;
+ while ((char *) desc < end) {
+ if (!desc->hdr.name[0] || (desc->hdr.name[0] == 0xff))
+ break;
+
+ if (!strcmp((char *) desc->hdr.name, "FIS directory"))
+ fisdir = desc;
+
+ if (!strcmp((char *) desc->hdr.name, "RedBoot"))
+ redboot = desc;
+
+ for (i = 0; i < n_old; i++) {
+ if (!strncmp((char *) desc->hdr.name, (char *) old[i].name, sizeof(desc->hdr.name))) {
+ size += desc->hdr.size;
+ last = desc;
+ if (!first)
+ first = desc;
+ break;
+ }
+ }
+ desc++;
+ }
+ desc--;
+
+ if (desc == last) {
+ desc = fisdir;
+ }
+
+ /* size fixup */
+ if (desc && (last->hdr.flash_base < desc->hdr.flash_base - last->hdr.size))
+ size += (desc->hdr.flash_base - last->hdr.flash_base) - last->hdr.size;
+
+#ifdef notyet
+ desc = first - 1;
+ if (redboot && (desc >= redboot)) {
+ if (first->hdr.flash_base - desc->hdr.size > desc->hdr.flash_base) {
+ int delta = first->hdr.flash_base - desc->hdr.size - desc->hdr.flash_base;
+
+ offset -= delta;
+ size += delta;
+ }
+ }
+#endif
+
+ last++;
+ desc = first + n_new;
+ offset = first->hdr.flash_base;
+
+ if (desc != last) {
+ if (desc > last)
+ tmp = (char *) desc;
+ else
+ tmp = (char *) last;
+
+ memmove(desc, last, end - tmp);
+ if (desc < last) {
+ tmp = end - (last - desc) * sizeof(struct fis_image_desc);
+ memset(tmp, 0xff, tmp - end);
+ }
+ }
+
+ for (part = new, desc = first; desc < first + n_new; desc++, part++) {
+ memset(desc, 0, sizeof(struct fis_image_desc));
+ memcpy(desc->hdr.name, part->name, sizeof(desc->hdr.name));
+ desc->crc.desc = 0;
+ desc->crc.file = 0;
+
+ desc->hdr.flash_base = offset;
+ desc->hdr.mem_base = part->loadaddr;
+ desc->hdr.entry_point = part->loadaddr;
+ desc->hdr.size = (part->size > 0) ? part->size : size;
+ desc->hdr.data_length = desc->hdr.size;
+
+ offset += desc->hdr.size;
+ size -= desc->hdr.size;
+ }
+
+ msync(fis_desc, fis_erasesize, MS_SYNC|MS_INVALIDATE);
+ fis_close();
+
+ return 0;
+}
--- /dev/null
+#ifndef __FIS_H
+#define __FIS_H
+
+struct fis_part {
+ unsigned char name[16];
+ uint32_t offset;
+ uint32_t loadaddr;
+ uint32_t size;
+};
+
+int fis_validate(struct fis_part *old, int n_old, struct fis_part *new, int n_new);
+int fis_remap(struct fis_part *old, int n_old, struct fis_part *new, int n_new);
+
+#endif
+/*
+ * jffs2 on-disk structure generator for mtd
+ *
+ * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License v2
+ * 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.
+ * Based on:
+ * JFFS2 -- Journalling Flash File System, Version 2.
+ * Copyright © 2001-2007 Red Hat, Inc.
+ * Created by David Woodhouse <dwmw2@infradead.org>
+ */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdint.h>
* For licensing information, see the file 'LICENCE' in the
* jffs2 directory.
*
- * $Id: jffs2.h,v 1.38 2005/09/26 11:37:23 havasi Exp $
*
*/
-/* $Id: mtd.h,v 1.38 2003/01/12 16:30:19 spse Exp $ */
#ifndef __MTD_MTD_H__
#define __MTD_MTD_H__
/*
* mtd - simple memory technology device manipulation tool
*
- * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
- * Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@dass-it.de>,
+ * Copyright (C) 2005-2009 Felix Fietkau <nbd@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.
+ * modify it under the terms of the GNU General Public License v2
+ * 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * $Id$
*
* The code is based on the linux-mtd examples.
*/
#include <sys/reboot.h>
#include <linux/reboot.h>
#include "mtd-api.h"
+#include "fis.h"
#include "mtd.h"
#define MAX_ARGS 8
mtdEraseInfo.start = offset;
mtdEraseInfo.length = erasesize;
ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
- if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0) {
- fprintf(stderr, "Erasing mtd failed.\n");
- exit(1);
- }
+ if (ioctl (fd, MEMERASE, &mtdEraseInfo) < 0)
+ return -1;
+
return 0;
}
static int mtd_check(const char *mtd)
{
+ char *next = NULL;
+ char *str = NULL;
int fd;
- fd = mtd_check_open(mtd);
- if (!fd)
- return 0;
+ if (strchr(mtd, ':')) {
+ str = strdup(mtd);
+ mtd = str;
+ }
- if (!buf)
- buf = malloc(erasesize);
+ do {
+ next = strchr(mtd, ':');
+ if (next) {
+ *next = 0;
+ next++;
+ }
+
+ fd = mtd_check_open(mtd);
+ if (!fd)
+ return 0;
+
+ if (!buf)
+ buf = malloc(erasesize);
+
+ close(fd);
+ mtd = next;
+ } while (next);
+
+ if (str)
+ free(str);
- close(fd);
return 1;
}
static int
mtd_unlock(const char *mtd)
{
- int fd;
struct erase_info_user mtdLockInfo;
+ char *next = NULL;
+ char *str = NULL;
+ int fd;
- fd = mtd_check_open(mtd);
- if(fd <= 0) {
- fprintf(stderr, "Could not open mtd device: %s\n", mtd);
- exit(1);
+ if (strchr(mtd, ':')) {
+ str = strdup(mtd);
+ mtd = str;
}
- if (quiet < 2)
- fprintf(stderr, "Unlocking %s ...\n", mtd);
+ do {
+ next = strchr(mtd, ':');
+ if (next) {
+ *next = 0;
+ next++;
+ }
+
+ fd = mtd_check_open(mtd);
+ if(fd <= 0) {
+ fprintf(stderr, "Could not open mtd device: %s\n", mtd);
+ exit(1);
+ }
- mtdLockInfo.start = 0;
- mtdLockInfo.length = mtdsize;
- if(ioctl(fd, MEMUNLOCK, &mtdLockInfo)) {
+ if (quiet < 2)
+ fprintf(stderr, "Unlocking %s ...\n", mtd);
+
+ mtdLockInfo.start = 0;
+ mtdLockInfo.length = mtdsize;
+ ioctl(fd, MEMUNLOCK, &mtdLockInfo);
close(fd);
- return 0;
- }
-
- close(fd);
+ mtd = next;
+ } while (next);
+
+ if (str)
+ free(str);
+
return 0;
}
for (mtdEraseInfo.start = 0;
mtdEraseInfo.start < mtdsize;
mtdEraseInfo.start += erasesize) {
-
+
ioctl(fd, MEMUNLOCK, &mtdEraseInfo);
if(ioctl(fd, MEMERASE, &mtdEraseInfo))
fprintf(stderr, "Failed to erase block on %s at 0x%x\n", mtd, mtdEraseInfo.start);
- }
+ }
close(fd);
return 0;
}
static int
-mtd_write(int imagefd, const char *mtd)
+mtd_write(int imagefd, const char *mtd, char *fis_layout)
{
+ char *next = NULL;
+ char *str = NULL;
int fd, result;
ssize_t r, w, e;
+ uint32_t offset = 0;
+
+#ifdef FIS_SUPPORT
+ static struct fis_part new_parts[MAX_ARGS];
+ static struct fis_part old_parts[MAX_ARGS];
+ int n_new = 0, n_old = 0;
+
+ if (fis_layout) {
+ const char *tmp = mtd;
+ char *word, *brkt;
+ int ret;
+
+ memset(&old_parts, 0, sizeof(old_parts));
+ memset(&new_parts, 0, sizeof(new_parts));
+
+ do {
+ next = strchr(tmp, ':');
+ if (!next)
+ next = (char *) tmp + strlen(tmp);
+
+ memcpy(old_parts[n_old].name, tmp, next - tmp);
+
+ n_old++;
+ tmp = next + 1;
+ } while(*next);
+
+ for (word = strtok_r(fis_layout, ",", &brkt);
+ word;
+ word = strtok_r(NULL, ",", &brkt)) {
+
+ tmp = strtok(word, ":");
+ strncpy((char *) new_parts[n_new].name, tmp, sizeof(new_parts[n_new].name) - 1);
+
+ tmp = strtok(NULL, ":");
+ if (!tmp)
+ goto next;
+
+ new_parts[n_new].size = strtoul(tmp, NULL, 0);
+
+ tmp = strtok(NULL, ":");
+ if (!tmp)
+ goto next;
+
+ new_parts[n_new].loadaddr = strtoul(tmp, NULL, 16);
+next:
+ n_new++;
+ }
+ ret = fis_validate(old_parts, n_old, new_parts, n_new);
+ if (ret < 0) {
+ fprintf(stderr, "Failed to validate the new FIS partition table\n");
+ exit(1);
+ }
+ if (ret == 0)
+ fis_layout = NULL;
+ }
+#endif
+
+ if (strchr(mtd, ':')) {
+ str = strdup(mtd);
+ mtd = str;
+ }
+
+ r = 0;
+
+resume:
+ next = strchr(mtd, ':');
+ if (next) {
+ *next = 0;
+ next++;
+ }
fd = mtd_check_open(mtd);
if(fd < 0) {
fprintf(stderr, "Could not open mtd device: %s\n", mtd);
exit(1);
}
-
+
if (quiet < 2)
fprintf(stderr, "Writing from %s to %s ... ", imagefile, mtd);
- r = w = e = 0;
+ w = e = 0;
if (!quiet)
fprintf(stderr, " [ ]");
for (;;) {
- /* buffer may contain data already (from trx check) */
- do {
+ /* buffer may contain data already (from trx check or last mtd partition write attempt) */
+ while (buflen < erasesize) {
r = read(imagefd, buf + buflen, erasesize - buflen);
if (r < 0) {
if ((errno == EINTR) || (errno == EAGAIN))
break;
buflen += r;
- } while (buflen < erasesize);
+ }
if (buflen == 0)
break;
if (!quiet)
fprintf(stderr, "\b\b\b[e]");
- mtd_erase_block(fd, e);
+
+ if (mtd_erase_block(fd, e) < 0) {
+ if (next) {
+ if (w < e) {
+ write(fd, buf + offset, e - w);
+ offset = e - w;
+ }
+ w = 0;
+ e = 0;
+ close(fd);
+ mtd = next;
+ fprintf(stderr, "\b\b\b \n");
+ goto resume;
+ } else {
+ fprintf(stderr, "Failed to erase block\n");
+ exit(1);
+ }
+ }
/* erase the chunk */
e += erasesize;
}
-
+
if (!quiet)
fprintf(stderr, "\b\b\b[w]");
-
- if ((result = write(fd, buf, buflen)) < buflen) {
+
+ if ((result = write(fd, buf + offset, buflen)) < buflen) {
if (result < 0) {
fprintf(stderr, "Error writing image.\n");
exit(1);
w += buflen;
buflen = 0;
+ offset = 0;
}
+
if (!quiet)
- fprintf(stderr, "\b\b\b\b");
+ fprintf(stderr, "\b\b\b\b ");
done:
if (quiet < 2)
fprintf(stderr, "\n");
+#ifdef FIS_SUPPORT
+ if (fis_layout) {
+ if (fis_remap(old_parts, n_old, new_parts, n_new) < 0)
+ fprintf(stderr, "Failed to update the FIS partition table\n");
+ }
+#endif
+
close(fd);
return 0;
}
static void usage(void)
{
- fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>\n\n"
+ fprintf(stderr, "Usage: mtd [<options> ...] <command> [<arguments> ...] <device>[:<device>...]\n\n"
"The device is in the format of mtdX (eg: mtd4) or its label.\n"
"mtd recognizes these commands:\n"
" unlock unlock the device\n"
" -e <device> erase <device> before executing the command\n"
" -d <name> directory for jffs2write, defaults to \"tmp\"\n"
" -j <name> integrate <file> into jffs2 data when writing an image\n"
+#ifdef FIS_SUPPORT
+ " -F <part>[:<size>[:<entrypoint>]][,<part>...]\n"
+ " alter the fis partition table to create new partitions replacing\n"
+ " the partitions provided as argument to the write command\n"
+ " (only valid together with the write command)\n"
+#endif
"\n"
"Example: To write linux.trx to mtd4 labeled as linux and reboot afterwards\n"
" mtd -r write linux.trx linux\n\n");
{
int ch, i, boot, imagefd = 0, force, unlocked;
char *erase[MAX_ARGS], *device = NULL;
+ char *fis_layout = NULL;
enum {
CMD_ERASE,
CMD_WRITE,
CMD_REFRESH,
CMD_JFFS2WRITE
} cmd = -1;
-
+
erase[0] = NULL;
boot = 0;
force = 0;
buflen = 0;
quiet = 0;
- while ((ch = getopt(argc, argv, "frqe:d:j:")) != -1)
+ while ((ch = getopt(argc, argv,
+#ifdef FIS_SUPPORT
+ "F:"
+#endif
+ "frqe:d:j:")) != -1)
switch (ch) {
case 'f':
force = 1;
i = 0;
while ((erase[i] != NULL) && ((i + 1) < MAX_ARGS))
i++;
-
+
erase[i++] = optarg;
erase[i] = NULL;
break;
case 'd':
jffs2dir = optarg;
break;
+#ifdef FIS_SUPPORT
+ case 'F':
+ fis_layout = optarg;
+ break;
+#endif
case '?':
default:
usage();
}
argc -= optind;
argv += optind;
-
+
if (argc < 2)
usage();
} else if ((strcmp(argv[0], "write") == 0) && (argc == 3)) {
cmd = CMD_WRITE;
device = argv[2];
-
+
if (strcmp(argv[1], "-") == 0) {
imagefile = "<stdin>";
imagefd = 0;
exit(1);
}
}
-
+
if (!mtd_check(device)) {
fprintf(stderr, "Can't open device for writing!\n");
exit(1);
} else if ((strcmp(argv[0], "jffs2write") == 0) && (argc == 3)) {
cmd = CMD_JFFS2WRITE;
device = argv[2];
-
+
imagefile = argv[1];
if (!mtd_check(device)) {
fprintf(stderr, "Can't open device for writing!\n");
}
sync();
-
+
i = 0;
unlocked = 0;
while (erase[i] != NULL) {
unlocked = 1;
i++;
}
-
-
+
switch (cmd) {
case CMD_UNLOCK:
if (!unlocked)
case CMD_WRITE:
if (!unlocked)
mtd_unlock(device);
- mtd_write(imagefd, device);
+ mtd_write(imagefd, device, fis_layout);
break;
case CMD_JFFS2WRITE:
if (!unlocked)
}
sync();
-
+
if (boot)
do_reboot();
# CONFIG_MTD_RAM is not set
CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK=-3
CONFIG_MTD_REDBOOT_PARTS=y
-CONFIG_MTD_REDBOOT_PARTS_READONLY=y
+# CONFIG_MTD_REDBOOT_PARTS_READONLY is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_SLRAM is not set
CONFIG_MTD_SPIFLASH=y
spiflash_done();
instr->state = MTD_ERASE_DONE;
- if (instr->callback) instr->callback (instr);
+ mtd_erase_callback(instr);
return 0;
}
--- /dev/null
+--- a/drivers/mtd/mtdpart.c
++++ b/drivers/mtd/mtdpart.c
+@@ -23,6 +23,8 @@
+ #include <linux/squashfs_fs.h>
+ #include <linux/root_dev.h>
+
++#define MTD_ERASE_PARTIAL 0x8000 /* partition only covers parts of an erase block */
++
+ /* Our partition linked list */
+ static LIST_HEAD(mtd_partitions);
+
+@@ -214,12 +216,56 @@ static int part_erase (struct mtd_info *
+ return -EROFS;
+ if (instr->addr >= mtd->size)
+ return -EINVAL;
++
++ instr->partial_start = false;
++ if (mtd->flags & MTD_ERASE_PARTIAL) {
++ size_t readlen = 0;
++ u32 mtd_ofs;
++
++ instr->erase_buf = kmalloc(part->master->erasesize, GFP_ATOMIC);
++ if (!instr->erase_buf)
++ return -ENOMEM;
++
++ instr->erase_buf_ofs = (part->offset + instr->addr) %
++ part->master->erasesize;
++
++ if (instr->erase_buf_ofs > 0) {
++ instr->addr -= instr->erase_buf_ofs;
++ ret = part->master->read(part->master,
++ instr->addr + part->offset,
++ part->master->erasesize,
++ &readlen, instr->erase_buf);
++
++ instr->partial_start = true;
++ } else {
++ instr->erase_buf_ofs = part->master->erasesize -
++ ((part->offset + part->mtd.size) % part->master->erasesize);
++
++ if (instr->erase_buf_ofs > 0) {
++ instr->len += instr->erase_buf_ofs;
++ ret = part->master->read(part->master,
++ part->offset + instr->addr +
++ instr->len - part->master->erasesize,
++ part->master->erasesize, &readlen,
++ instr->erase_buf);
++ } else {
++ ret = 0;
++ }
++ }
++ if (ret < 0) {
++ kfree(instr->erase_buf);
++ return ret;
++ }
++ }
+ instr->addr += part->offset;
+ ret = part->master->erase(part->master, instr);
++ instr->partial_start = false;
+ if (ret) {
+ if (instr->fail_addr != 0xffffffff)
+ instr->fail_addr -= part->offset;
+ instr->addr -= part->offset;
++ if (mtd->flags & MTD_ERASE_PARTIAL)
++ kfree(instr->erase_buf);
+ }
+ return ret;
+ }
+@@ -228,7 +274,25 @@ void mtd_erase_callback(struct erase_inf
+ {
+ if (instr->mtd->erase == part_erase) {
+ struct mtd_part *part = PART(instr->mtd);
++ size_t wrlen = 0;
+
++ if (instr->mtd->flags & MTD_ERASE_PARTIAL) {
++ if (instr->partial_start) {
++ part->master->write(part->master,
++ instr->addr, instr->erase_buf_ofs,
++ &wrlen, instr->erase_buf);
++ instr->addr += instr->erase_buf_ofs;
++ } else {
++ instr->len -= instr->erase_buf_ofs;
++ part->master->write(part->master,
++ instr->addr + instr->len,
++ instr->erase_buf_ofs, &wrlen,
++ instr->erase_buf +
++ part->master->erasesize -
++ instr->erase_buf_ofs);
++ }
++ kfree(instr->erase_buf);
++ }
+ if (instr->fail_addr != 0xffffffff)
+ instr->fail_addr -= part->offset;
+ instr->addr -= part->offset;
+@@ -456,17 +520,24 @@ static int add_one_partition(struct mtd_
+ if ((slave->mtd.flags & MTD_WRITEABLE) &&
+ (slave->offset % slave->mtd.erasesize)) {
+ /* Doesn't start on a boundary of major erase size */
+- /* FIXME: Let it be writable if it is on a boundary of _minor_ erase size though */
+- slave->mtd.flags &= ~MTD_WRITEABLE;
+- printk ("mtd: partition \"%s\" doesn't start on an erase block boundary -- force read-only\n",
+- part->name);
++ slave->mtd.flags |= MTD_ERASE_PARTIAL;
++ if (((u32) slave->mtd.size) > master->erasesize)
++ slave->mtd.flags &= ~MTD_WRITEABLE;
++ else
++ slave->mtd.erasesize = slave->mtd.size;
+ }
+ if ((slave->mtd.flags & MTD_WRITEABLE) &&
+ (slave->mtd.size % slave->mtd.erasesize)) {
+- slave->mtd.flags &= ~MTD_WRITEABLE;
+- printk ("mtd: partition \"%s\" doesn't end on an erase block -- force read-only\n",
+- part->name);
+- }
++ slave->mtd.flags |= MTD_ERASE_PARTIAL;
++
++ if ((u32) slave->mtd.size > master->erasesize)
++ slave->mtd.flags &= ~MTD_WRITEABLE;
++ else
++ slave->mtd.erasesize = slave->mtd.size;
++ }
++ if ((slave->mtd.flags & (MTD_ERASE_PARTIAL|MTD_WRITEABLE)) == MTD_ERASE_PARTIAL)
++ printk(KERN_WARNING"mtd: partition \"%s\" must either start or end on erase block boundary or be smaller than an erase block -- forcing read-only\n",
++ part->name);
+
+ slave->mtd.ecclayout = master->ecclayout;
+ if (master->block_isbad) {
+--- a/include/linux/mtd/mtd.h
++++ b/include/linux/mtd/mtd.h
+@@ -43,6 +43,10 @@ struct erase_info {
+ u_long priv;
+ u_char state;
+ struct erase_info *next;
++
++ u8 *erase_buf;
++ u32 erase_buf_ofs;
++ bool partial_start;
+ };
+
+ struct mtd_erase_region_info {
projects / openwrt / svn-archive / openwrt.git / commitdiff