diff options
Diffstat (limited to 'target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c')
| -rw-r--r-- | target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c | 217 |
1 files changed, 0 insertions, 217 deletions
diff --git a/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c b/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c deleted file mode 100644 index 7e4a63b74b..0000000000 --- a/target/linux/adm5120/files-2.6.26/drivers/mtd/trxsplit.c +++ /dev/null @@ -1,217 +0,0 @@ -/* - * Copyright (C) Gabor Juhos <juhosg@openwrt.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/list.h> -#include <linux/kmod.h> -#include <linux/root_dev.h> - -#include <linux/mtd/mtd.h> -#include <linux/mtd/partitions.h> - -#include <linux/byteorder/generic.h> - -#define PFX "trxsplit: " - -#define TRX_MAGIC 0x30524448 /* "HDR0" */ -#define TRX_VERSION 1 -#define TRX_MAX_LEN 0x3A0000 -#define TRX_NO_HEADER 0x1 /* do not write TRX header */ -#define TRX_GZ_FILES 0x2 /* contains individual gzip files */ -#define TRX_MAX_OFFSET 3 -#define TRX_MIN_KERNEL_SIZE 256*1024 - -struct trx_header { - u32 magic; /* "HDR0" */ - u32 len; /* Length of file including header */ - u32 crc32; /* 32-bit CRC from flag_version to end of file */ - u32 flag_version; /* 0:15 flags, 16:31 version */ - u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions */ -}; - -#define TRX_ALIGN 0x1000 - -static int trx_nr_parts; -static unsigned long trx_offset; -static struct mtd_info *trx_mtd; -static struct mtd_partition trx_parts[TRX_MAX_OFFSET]; -static struct trx_header trx_hdr; - -static int trxsplit_refresh_partitions(struct mtd_info *mtd); - -static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset) -{ - size_t retlen; - int err; - - err = mtd->read(mtd, offset, sizeof(trx_hdr), &retlen, - (void *)&trx_hdr); - if (err) { - printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name); - goto err_out; - } - - if (retlen != sizeof(trx_hdr)) { - printk(KERN_ALERT PFX "reading failed on '%s'\n", mtd->name); - goto err_out; - } - - trx_hdr.magic = le32_to_cpu(trx_hdr.magic); - trx_hdr.len = le32_to_cpu(trx_hdr.len); - trx_hdr.crc32 = le32_to_cpu(trx_hdr.crc32); - trx_hdr.flag_version = le32_to_cpu(trx_hdr.flag_version); - trx_hdr.offsets[0] = le32_to_cpu(trx_hdr.offsets[0]); - trx_hdr.offsets[1] = le32_to_cpu(trx_hdr.offsets[1]); - trx_hdr.offsets[2] = le32_to_cpu(trx_hdr.offsets[2]); - - /* sanity checks */ - if (trx_hdr.magic != TRX_MAGIC) - goto err_out; - - if (trx_hdr.len > mtd->size - offset) - goto err_out; - - /* TODO: add crc32 checking too? */ - - return 0; - -err_out: - return -1; -} - -static void trxsplit_findtrx(struct mtd_info *mtd) -{ - unsigned long offset; - int err; - - printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name); - - err = 0; - for (offset = 0; offset < mtd->size; offset += TRX_ALIGN) { - err = trxsplit_checktrx(mtd, offset); - if (err == 0) - break; - } - - if (err) - return; - - printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset); - - trx_mtd = mtd; - trx_offset = offset; -} - -static void trxsplit_create_partitions(struct mtd_info *mtd) -{ - struct mtd_partition *part = trx_parts; - int err; - int i; - - for (i = 0; i < TRX_MAX_OFFSET; i++) { - part = &trx_parts[i]; - if (trx_hdr.offsets[i] == 0) - continue; - part->offset = trx_offset + trx_hdr.offsets[i]; - trx_nr_parts++; - } - - for (i = 0; i < trx_nr_parts-1; i++) - trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset; - - trx_parts[i].size = mtd->size - trx_parts[i].offset; - - i = 0; - part = &trx_parts[i]; - if (part->size < TRX_MIN_KERNEL_SIZE) { - part->name = "loader"; - i++; - } - - part = &trx_parts[i]; - part->name = "kernel"; - i++; - - part = &trx_parts[i]; - part->name = "rootfs"; - - err = add_mtd_partitions(mtd, trx_parts, trx_nr_parts); - if (err) { - printk(KERN_ALERT PFX "adding TRX partitions failed\n"); - return; - } - - mtd->refresh_device = trxsplit_refresh_partitions; -} - -static int trxsplit_refresh_partitions(struct mtd_info *mtd) -{ - printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n", - mtd->name, MTD_BLOCK_MAJOR, mtd->index); - - /* remove old partitions */ - del_mtd_partitions(mtd); - - trxsplit_findtrx(mtd); - if (!trx_mtd) - goto err; - - trxsplit_create_partitions(trx_mtd); - return 1; - -err: - return 0; -} - -static void __init trxsplit_add_mtd(struct mtd_info *mtd) -{ - if (mtd->type != MTD_NORFLASH) { - printk(KERN_INFO PFX "'%s' is not a NOR flash, skipped\n", - mtd->name); - return; - } - - if (!trx_mtd) - trxsplit_findtrx(mtd); -} - -static void __init trxsplit_remove_mtd(struct mtd_info *mtd) -{ - /* nothing to do */ -} - -static struct mtd_notifier trxsplit_notifier __initdata = { - .add = trxsplit_add_mtd, - .remove = trxsplit_remove_mtd, -}; - -static void __init trxsplit_scan(void) -{ - register_mtd_user(&trxsplit_notifier); - unregister_mtd_user(&trxsplit_notifier); -} - -static int __init trxsplit_init(void) -{ - trxsplit_scan(); - - if (trx_mtd) { - printk(KERN_INFO PFX "creating TRX partitions in '%s' " - "(%d,%d)\n", trx_mtd->name, MTD_BLOCK_MAJOR, - trx_mtd->index); - trxsplit_create_partitions(trx_mtd); - } - - return 0; -} - -late_initcall(trxsplit_init); |