summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/drivers/mtd/redboot.c
diff options
context:
space:
mode:
Diffstat (limited to 'ANDROID_3.4.5/drivers/mtd/redboot.c')
-rw-r--r--ANDROID_3.4.5/drivers/mtd/redboot.c316
1 files changed, 0 insertions, 316 deletions
diff --git a/ANDROID_3.4.5/drivers/mtd/redboot.c b/ANDROID_3.4.5/drivers/mtd/redboot.c
deleted file mode 100644
index 580035c8..00000000
--- a/ANDROID_3.4.5/drivers/mtd/redboot.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*
- * Parse RedBoot-style Flash Image System (FIS) tables and
- * produce a Linux partition array to match.
- *
- * Copyright © 2001 Red Hat UK Limited
- * Copyright © 2001-2010 David Woodhouse <dwmw2@infradead.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 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 St, Fifth Floor, Boston, MA 02110-1301 USA
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/vmalloc.h>
-
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/module.h>
-
-struct fis_image_desc {
- unsigned char name[16]; // Null terminated name
- uint32_t flash_base; // Address within FLASH of image
- uint32_t mem_base; // Address in memory where it executes
- uint32_t size; // Length of image
- uint32_t entry_point; // Execution entry point
- uint32_t data_length; // Length of actual data
- unsigned char _pad[256-(16+7*sizeof(uint32_t))];
- uint32_t desc_cksum; // Checksum over image descriptor
- uint32_t file_cksum; // Checksum over image data
-};
-
-struct fis_list {
- struct fis_image_desc *img;
- struct fis_list *next;
-};
-
-static int directory = CONFIG_MTD_REDBOOT_DIRECTORY_BLOCK;
-module_param(directory, int, 0);
-
-static inline int redboot_checksum(struct fis_image_desc *img)
-{
- /* RedBoot doesn't actually write the desc_cksum field yet AFAICT */
- return 1;
-}
-
-static int parse_redboot_partitions(struct mtd_info *master,
- struct mtd_partition **pparts,
- struct mtd_part_parser_data *data)
-{
- int nrparts = 0;
- struct fis_image_desc *buf;
- struct mtd_partition *parts;
- struct fis_list *fl = NULL, *tmp_fl;
- int ret, i;
- size_t retlen;
- char *names;
- char *nullname;
- int namelen = 0;
- int nulllen = 0;
- int numslots;
- unsigned long offset;
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
- static char nullstring[] = "unallocated";
-#endif
-
- if ( directory < 0 ) {
- offset = master->size + directory * master->erasesize;
- while (mtd_block_isbad(master, offset)) {
- if (!offset) {
- nogood:
- printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n");
- return -EIO;
- }
- offset -= master->erasesize;
- }
- } else {
- offset = directory * master->erasesize;
- while (mtd_block_isbad(master, offset)) {
- offset += master->erasesize;
- if (offset == master->size)
- goto nogood;
- }
- }
- buf = vmalloc(master->erasesize);
-
- if (!buf)
- return -ENOMEM;
-
- printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n",
- master->name, offset);
-
- ret = mtd_read(master, offset, master->erasesize, &retlen,
- (void *)buf);
-
- if (ret)
- goto out;
-
- if (retlen != master->erasesize) {
- ret = -EIO;
- goto out;
- }
-
- numslots = (master->erasesize / sizeof(struct fis_image_desc));
- for (i = 0; i < numslots; i++) {
- if (!memcmp(buf[i].name, "FIS directory", 14)) {
- /* This is apparently the FIS directory entry for the
- * FIS directory itself. The FIS directory size is
- * one erase block; if the buf[i].size field is
- * swab32(erasesize) then we know we are looking at
- * a byte swapped FIS directory - swap all the entries!
- * (NOTE: this is 'size' not 'data_length'; size is
- * the full size of the entry.)
- */
-
- /* RedBoot can combine the FIS directory and
- config partitions into a single eraseblock;
- we assume wrong-endian if either the swapped
- 'size' matches the eraseblock size precisely,
- or if the swapped size actually fits in an
- eraseblock while the unswapped size doesn't. */
- if (swab32(buf[i].size) == master->erasesize ||
- (buf[i].size > master->erasesize
- && swab32(buf[i].size) < master->erasesize)) {
- int j;
- /* Update numslots based on actual FIS directory size */
- numslots = swab32(buf[i].size) / sizeof (struct fis_image_desc);
- for (j = 0; j < numslots; ++j) {
-
- /* A single 0xff denotes a deleted entry.
- * Two of them in a row is the end of the table.
- */
- if (buf[j].name[0] == 0xff) {
- if (buf[j].name[1] == 0xff) {
- break;
- } else {
- continue;
- }
- }
-
- /* The unsigned long fields were written with the
- * wrong byte sex, name and pad have no byte sex.
- */
- swab32s(&buf[j].flash_base);
- swab32s(&buf[j].mem_base);
- swab32s(&buf[j].size);
- swab32s(&buf[j].entry_point);
- swab32s(&buf[j].data_length);
- swab32s(&buf[j].desc_cksum);
- swab32s(&buf[j].file_cksum);
- }
- } else if (buf[i].size < master->erasesize) {
- /* Update numslots based on actual FIS directory size */
- numslots = buf[i].size / sizeof(struct fis_image_desc);
- }
- break;
- }
- }
- if (i == numslots) {
- /* Didn't find it */
- printk(KERN_NOTICE "No RedBoot partition table detected in %s\n",
- master->name);
- ret = 0;
- goto out;
- }
-
- for (i = 0; i < numslots; i++) {
- struct fis_list *new_fl, **prev;
-
- if (buf[i].name[0] == 0xff) {
- if (buf[i].name[1] == 0xff) {
- break;
- } else {
- continue;
- }
- }
- if (!redboot_checksum(&buf[i]))
- break;
-
- new_fl = kmalloc(sizeof(struct fis_list), GFP_KERNEL);
- namelen += strlen(buf[i].name)+1;
- if (!new_fl) {
- ret = -ENOMEM;
- goto out;
- }
- new_fl->img = &buf[i];
- if (data && data->origin)
- buf[i].flash_base -= data->origin;
- else
- buf[i].flash_base &= master->size-1;
-
- /* I'm sure the JFFS2 code has done me permanent damage.
- * I now think the following is _normal_
- */
- prev = &fl;
- while(*prev && (*prev)->img->flash_base < new_fl->img->flash_base)
- prev = &(*prev)->next;
- new_fl->next = *prev;
- *prev = new_fl;
-
- nrparts++;
- }
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
- if (fl->img->flash_base) {
- nrparts++;
- nulllen = sizeof(nullstring);
- }
-
- for (tmp_fl = fl; tmp_fl->next; tmp_fl = tmp_fl->next) {
- if (tmp_fl->img->flash_base + tmp_fl->img->size + master->erasesize <= tmp_fl->next->img->flash_base) {
- nrparts++;
- nulllen = sizeof(nullstring);
- }
- }
-#endif
- parts = kzalloc(sizeof(*parts)*nrparts + nulllen + namelen, GFP_KERNEL);
-
- if (!parts) {
- ret = -ENOMEM;
- goto out;
- }
-
- nullname = (char *)&parts[nrparts];
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
- if (nulllen > 0) {
- strcpy(nullname, nullstring);
- }
-#endif
- names = nullname + nulllen;
-
- i=0;
-
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
- if (fl->img->flash_base) {
- parts[0].name = nullname;
- parts[0].size = fl->img->flash_base;
- parts[0].offset = 0;
- i++;
- }
-#endif
- for ( ; i<nrparts; i++) {
- parts[i].size = fl->img->size;
- parts[i].offset = fl->img->flash_base;
- parts[i].name = names;
-
- strcpy(names, fl->img->name);
-#ifdef CONFIG_MTD_REDBOOT_PARTS_READONLY
- if (!memcmp(names, "RedBoot", 8) ||
- !memcmp(names, "RedBoot config", 15) ||
- !memcmp(names, "FIS directory", 14)) {
- parts[i].mask_flags = MTD_WRITEABLE;
- }
-#endif
- names += strlen(names)+1;
-
-#ifdef CONFIG_MTD_REDBOOT_PARTS_UNALLOCATED
- if(fl->next && fl->img->flash_base + fl->img->size + master->erasesize <= fl->next->img->flash_base) {
- i++;
- parts[i].offset = parts[i-1].size + parts[i-1].offset;
- parts[i].size = fl->next->img->flash_base - parts[i].offset;
- parts[i].name = nullname;
- }
-#endif
- tmp_fl = fl;
- fl = fl->next;
- kfree(tmp_fl);
- }
- ret = nrparts;
- *pparts = parts;
- out:
- while (fl) {
- struct fis_list *old = fl;
- fl = fl->next;
- kfree(old);
- }
- vfree(buf);
- return ret;
-}
-
-static struct mtd_part_parser redboot_parser = {
- .owner = THIS_MODULE,
- .parse_fn = parse_redboot_partitions,
- .name = "RedBoot",
-};
-
-/* mtd parsers will request the module by parser name */
-MODULE_ALIAS("RedBoot");
-
-static int __init redboot_parser_init(void)
-{
- return register_mtd_parser(&redboot_parser);
-}
-
-static void __exit redboot_parser_exit(void)
-{
- deregister_mtd_parser(&redboot_parser);
-}
-
-module_init(redboot_parser_init);
-module_exit(redboot_parser_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
-MODULE_DESCRIPTION("Parsing code for RedBoot Flash Image System (FIS) tables");
generated by cgit (git 2.34.1) at 2025-07-10 05:29:48 +0000