+++ /dev/null
-/*
- * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
- * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
- * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
- *
- * original functions for finding root filesystem from 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * Copyright 2001-2003, Broadcom Corporation
- * All Rights Reserved.
- *
- * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
- * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
- * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
- *
- * Flash mapping for BCM963XX boards
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/wait.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/map.h>
-#ifdef CONFIG_MTD_PARTITIONS
-#include <linux/mtd/partitions.h>
-#endif
-#include <linux/squashfs_fs.h>
-#include <linux/jffs2.h>
-#include <linux/crc32.h>
-#include <asm/io.h>
-
-#include <asm/mach-bcm963xx/bootloaders.h>
-
-extern int boot_loader_type;
-extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts, unsigned long fis_origin);
-static struct mtd_partition *parsed_parts;
-
-
-#define TRX_MAGIC 0x30524448 /* "HDR0" */
-#define TRX_VERSION 1
-#define TRX_MAX_LEN 0x3A0000
-#define TRX_NO_HEADER 1 /* Do not write TRX header */
-#define TRX_GZ_FILES 0x2 /* Contains up to TRX_MAX_OFFSET individual gzip files */
-#define TRX_MAX_OFFSET 3
-
-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 from start of header */
-};
-
-#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
-#define NVRAM_SPACE 0x8000
-#define WINDOW_ADDR 0x1FC00000
-#define WINDOW_SIZE 0x400000
-#define BUSWIDTH 2
-
-#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */
-
-static struct mtd_info *bcm963xx_mtd;
-
-static struct map_info bcm963xx_map = {
- .name = "Physically mapped flash",
- .size = WINDOW_SIZE,
- .bankwidth = BUSWIDTH,
- .phys = WINDOW_ADDR,
-};
-
-#ifdef CONFIG_MTD_PARTITIONS
-
-static struct mtd_partition bcm963xx_parts[] = {
- { name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
- { name: "linux", offset: 0, size: 0, },
- { name: "rootfs", offset: 0, size: 0, },
- { name: "nvram", offset: 0, size: 0, },
- { name: "OpenWrt", offset: 0, size: 0, },
- { name: NULL, },
-};
-
-static int __init
-find_cfe_size(struct mtd_info *mtd, size_t size)
-{
- struct trx_header *trx;
- unsigned char buf[512];
- int off;
- size_t len;
- int blocksize;
-
- trx = (struct trx_header *) buf;
-
- blocksize = mtd->erasesize;
- if (blocksize < 0x10000)
- blocksize = 0x10000;
-
- for (off = (128*1024); off < size; off += blocksize) {
- memset(buf, 0xe5, sizeof(buf));
-
- /*
- * Read into buffer
- */
- if (mtd->read(mtd, off, sizeof(buf), &len, buf) ||
- len != sizeof(buf))
- continue;
-
- /* found a TRX header */
- if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
- goto found;
- }
- }
-
- printk(KERN_NOTICE
- "%s: Couldn't find bootloader size\n",
- mtd->name);
- return -1;
-
- found:
- printk(KERN_NOTICE "bootloader size: %d\n", off);
- return off;
-
-}
-
-/*
- * Copied from mtdblock.c
- *
- * Cache stuff...
- *
- * Since typical flash erasable sectors are much larger than what Linux's
- * buffer cache can handle, we must implement read-modify-write on flash
- * sectors for each block write requests. To avoid over-erasing flash sectors
- * and to speed things up, we locally cache a whole flash sector while it is
- * being written to until a different sector is required.
- */
-
-static void erase_callback(struct erase_info *done)
-{
- wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
- wake_up(wait_q);
-}
-
-static int erase_write (struct mtd_info *mtd, unsigned long pos,
- int len, const char *buf)
-{
- struct erase_info erase;
- DECLARE_WAITQUEUE(wait, current);
- wait_queue_head_t wait_q;
- size_t retlen;
- int ret;
-
- /*
- * First, let's erase the flash block.
- */
-
- init_waitqueue_head(&wait_q);
- erase.mtd = mtd;
- erase.callback = erase_callback;
- erase.addr = pos;
- erase.len = len;
- erase.priv = (u_long)&wait_q;
-
- set_current_state(TASK_INTERRUPTIBLE);
- add_wait_queue(&wait_q, &wait);
-
- ret = mtd->erase(mtd, &erase);
- if (ret) {
- set_current_state(TASK_RUNNING);
- remove_wait_queue(&wait_q, &wait);
- printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
- "on \"%s\" failed\n",
- pos, len, mtd->name);
- return ret;
- }
-
- schedule(); /* Wait for erase to finish. */
- remove_wait_queue(&wait_q, &wait);
-
- /*
- * Next, writhe data to flash.
- */
-
- ret = mtd->write (mtd, pos, len, &retlen, buf);
- if (ret)
- return ret;
- if (retlen != len)
- return -EIO;
- return 0;
-}
-
-
-
-
-static int __init
-find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
-{
- struct trx_header trx, *trx2;
- unsigned char buf[512], *block;
- int off, blocksize;
- u32 i, crc = ~0;
- size_t len;
- struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
-
- blocksize = mtd->erasesize;
- if (blocksize < 0x10000)
- blocksize = 0x10000;
-
- for (off = (128*1024); off < size; off += blocksize) {
- memset(&trx, 0xe5, sizeof(trx));
-
- /*
- * Read into buffer
- */
- if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
- len != sizeof(trx))
- continue;
-
- /* found a TRX header */
- if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
- part->offset = le32_to_cpu(trx.offsets[2]) ? :
- le32_to_cpu(trx.offsets[1]);
- part->size = le32_to_cpu(trx.len);
-
- part->size -= part->offset;
- part->offset += off;
-
- goto found;
- }
- }
-
- printk(KERN_NOTICE
- "%s: Couldn't find root filesystem\n",
- mtd->name);
- return -1;
-
- found:
- if (part->size == 0)
- return 0;
-
- if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
- return 0;
-
- if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
- printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used);
-
- /* Update the squashfs partition size based on the superblock info */
- part->size = sb->bytes_used;
- len = part->offset + part->size;
- len += (mtd->erasesize - 1);
- len &= ~(mtd->erasesize - 1);
- part->size = len - part->offset;
- } else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) {
- printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name);
-
- /* Move the squashfs outside of the trx */
- part->size = 0;
- } else {
- printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name);
- return 0;
- }
-
- if (trx.len != part->offset + part->size - off) {
- /* Update the trx offsets and length */
- trx.len = part->offset + part->size - off;
-
- /* Update the trx crc32 */
- for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
- if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
- return 0;
- crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
- }
- trx.crc32 = crc;
-
- /* read first eraseblock from the trx */
- block = kmalloc(mtd->erasesize, GFP_KERNEL);
- trx2 = (struct trx_header *) block;
- if (mtd->read(mtd, off, mtd->erasesize, &len, block) || len != mtd->erasesize) {
- printk("Error accessing the first trx eraseblock\n");
- return 0;
- }
-
- printk("Updating TRX offsets and length:\n");
- printk("old trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx2->offsets[0], trx2->offsets[1], trx2->offsets[2], trx2->len, trx2->crc32);
- printk("new trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx.offsets[0], trx.offsets[1], trx.offsets[2], trx.len, trx.crc32);
-
- /* Write updated trx header to the flash */
- memcpy(block, &trx, sizeof(trx));
- if (mtd->unlock)
- mtd->unlock(mtd, off, mtd->erasesize);
- erase_write(mtd, off, mtd->erasesize, block);
- if (mtd->sync)
- mtd->sync(mtd);
- kfree(block);
- printk("Done\n");
- }
-
- return part->size;
-}
-
-struct mtd_partition * __init
-init_mtd_partitions(struct mtd_info *mtd, size_t size)
-{
- int cfe_size;
-
- if ((cfe_size = find_cfe_size(mtd,size)) < 0)
- return NULL;
-
- /* boot loader */
- bcm963xx_parts[0].offset = 0;
- bcm963xx_parts[0].size = cfe_size;
-
- /* nvram */
- if (cfe_size != 384 * 1024) {
- bcm963xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
- bcm963xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
- } else {
- /* nvram (old 128kb config partition on netgear wgt634u) */
- bcm963xx_parts[3].offset = bcm963xx_parts[0].size;
- bcm963xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
- }
-
- /* linux (kernel and rootfs) */
- if (cfe_size != 384 * 1024) {
- bcm963xx_parts[1].offset = bcm963xx_parts[0].size;
- bcm963xx_parts[1].size = bcm963xx_parts[3].offset -
- bcm963xx_parts[1].offset;
- } else {
- /* do not count the elf loader, which is on one block */
- bcm963xx_parts[1].offset = bcm963xx_parts[0].size +
- bcm963xx_parts[3].size + mtd->erasesize;
- bcm963xx_parts[1].size = size -
- bcm963xx_parts[0].size -
- (2*bcm963xx_parts[3].size) -
- mtd->erasesize;
- }
-
- /* find and size rootfs */
- if (find_root(mtd,size,&bcm963xx_parts[2])==0) {
- /* entirely jffs2 */
- bcm963xx_parts[4].name = NULL;
- bcm963xx_parts[2].size = size - bcm963xx_parts[2].offset -
- bcm963xx_parts[3].size;
- } else {
- /* legacy setup */
- /* calculate leftover flash, and assign it to the jffs2 partition */
- if (cfe_size != 384 * 1024) {
- bcm963xx_parts[4].offset = bcm963xx_parts[2].offset +
- bcm963xx_parts[2].size;
- if ((bcm963xx_parts[4].offset % mtd->erasesize) > 0) {
- bcm963xx_parts[4].offset += mtd->erasesize -
- (bcm963xx_parts[4].offset % mtd->erasesize);
- }
- bcm963xx_parts[4].size = bcm963xx_parts[3].offset -
- bcm963xx_parts[4].offset;
- } else {
- bcm963xx_parts[4].offset = bcm963xx_parts[2].offset +
- bcm963xx_parts[2].size;
- if ((bcm963xx_parts[4].offset % mtd->erasesize) > 0) {
- bcm963xx_parts[4].offset += mtd->erasesize -
- (bcm963xx_parts[4].offset % mtd->erasesize);
- }
- bcm963xx_parts[4].size = size - bcm963xx_parts[3].size -
- bcm963xx_parts[4].offset;
- }
- }
-
- return bcm963xx_parts;
-}
-#endif
-
-int __init init_bcm963xx_map(void)
-{
- size_t size;
- int ret = 0;
-#ifdef CONFIG_MTD_PARTITIONS
- struct mtd_partition *parts;
- int i;
-#endif
-
- printk("BCM963xx flash init: 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE);
- bcm963xx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
-
- if (!bcm963xx_map.virt) {
- printk("Failed to ioremap\n");
- return -EIO;
- }
- simple_map_init(&bcm963xx_map);
-
- if (!(bcm963xx_mtd = do_map_probe("cfi_probe", &bcm963xx_map))) {
- printk("Failed to do_map_probe\n");
- iounmap((void *)bcm963xx_map.virt);
- return -ENXIO;
- }
-
- bcm963xx_mtd->owner = THIS_MODULE;
-
- size = bcm963xx_mtd->size;
-
- printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
-
-#ifdef CONFIG_MTD_PARTITIONS
- if (boot_loader_type == BOOT_LOADER_CFE) {
- parts = init_mtd_partitions(bcm963xx_mtd, size);
- for (i = 0; parts[i].name; i++);
- ret = add_mtd_partitions(bcm963xx_mtd, parts, i);
- if (ret) {
- printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
- goto fail;
- }
- }
- else {
- int parsed_nr_parts = 0;
- char * part_type;
-
- if (bcm963xx_mtd->size > 0x00400000) {
- printk("Support for extended flash memory size : 0x%08X ; ONLY 64MBIT SUPPORT\n", bcm963xx_mtd->size);
- bcm963xx_map.virt = (unsigned long)EXTENDED_SIZE;
- }
-
-#ifdef CONFIG_MTD_REDBOOT_PARTS
- if (parsed_nr_parts == 0) {
- int ret = parse_redboot_partitions(bcm963xx_mtd, &parsed_parts, 0);
- if (ret > 0) {
- part_type = "RedBoot";
- parsed_nr_parts = ret;
- }
- }
-#endif
- add_mtd_partitions(bcm963xx_mtd, parsed_parts, parsed_nr_parts);
-#endif
- }
- return 0;
-
- fail:
- if (bcm963xx_mtd)
- map_destroy(bcm963xx_mtd);
- if (bcm963xx_map.virt)
- iounmap((void *)bcm963xx_map.virt);
- bcm963xx_map.virt = 0;
- return ret;
-}
-
-void __exit cleanup_bcm963xx_map(void)
-{
-#ifdef CONFIG_MTD_PARTITIONS
- del_mtd_partitions(bcm963xx_mtd);
-#endif
- map_destroy(bcm963xx_mtd);
- iounmap((void *)bcm963xx_map.virt);
-}
-
-module_init(init_bcm963xx_map);
-module_exit(cleanup_bcm963xx_map);
projects / openwrt.git / blobdiff