535 lines
15 KiB
C
535 lines
15 KiB
C
/*
|
|
* 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 ADM5120 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-adm5120/myloader.h>
|
|
#include <asm/mach-adm5120/adm5120_info.h>
|
|
|
|
extern int parse_myloader_partitions(struct mtd_info *master,
|
|
struct mtd_partition **pparts,
|
|
unsigned long origin);
|
|
|
|
/* Macros for switching flash bank
|
|
ADM5120 only support 2MB flash address space
|
|
so GPIO5 is used as A20
|
|
*/
|
|
#define GPIO_IO ((volatile unsigned long *)0xb20000b8)
|
|
#define FLASH_A20_GPIO 5
|
|
#define FLASH_BOUNDARY 0x200000
|
|
|
|
|
|
#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
|
|
|
|
static struct mtd_info *adm5120_mtd;
|
|
|
|
static struct map_info adm5120_map = {
|
|
name: "adm5120 physically mapped flash",
|
|
size: WINDOW_SIZE,
|
|
bankwidth: BUSWIDTH,
|
|
phys: WINDOW_ADDR,
|
|
};
|
|
|
|
#ifdef CONFIG_MTD_PARTITIONS
|
|
|
|
static struct mtd_partition adm5120_cfe_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 void flash_switch_bank(unsigned long addr)
|
|
{
|
|
unsigned long val;
|
|
|
|
/* Set GPIO as output */
|
|
val = *GPIO_IO | (1 << (FLASH_A20_GPIO+16));
|
|
if ( addr & FLASH_BOUNDARY ) {
|
|
val |= 1 << (FLASH_A20_GPIO + 24);
|
|
} else {
|
|
val &= ~(1 << (FLASH_A20_GPIO + 24));
|
|
}
|
|
*GPIO_IO = val;
|
|
}
|
|
|
|
static map_word adm5120_map_read(struct map_info *map, unsigned long ofs)
|
|
{
|
|
flash_switch_bank(ofs);
|
|
return inline_map_read(map, ofs);
|
|
}
|
|
|
|
static void adm5120_map_write(struct map_info *map, const map_word datum, unsigned long ofs)
|
|
{
|
|
flash_switch_bank(ofs);
|
|
inline_map_write(map, datum, ofs);
|
|
}
|
|
|
|
static void adm5120_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
|
|
{
|
|
ssize_t tmp;
|
|
|
|
if (from < FLASH_BOUNDARY) {
|
|
tmp = (len < (FLASH_BOUNDARY - from)) ? len : (FLASH_BOUNDARY - from);
|
|
flash_switch_bank(0);
|
|
inline_map_copy_from(map, to, from, tmp);
|
|
to = (void *)((char *)to + tmp);
|
|
from += tmp;
|
|
len -= tmp;
|
|
}
|
|
if (len > 0) {
|
|
flash_switch_bank(FLASH_BOUNDARY);
|
|
inline_map_copy_from(map, to, from, len);
|
|
}
|
|
|
|
}
|
|
|
|
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 */
|
|
adm5120_cfe_parts[0].offset = 0;
|
|
adm5120_cfe_parts[0].size = cfe_size;
|
|
|
|
/* nvram */
|
|
if (cfe_size != 384 * 1024) {
|
|
adm5120_cfe_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
|
|
adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
|
|
} else {
|
|
/* nvram (old 128kb config partition on netgear wgt634u) */
|
|
adm5120_cfe_parts[3].offset = adm5120_cfe_parts[0].size;
|
|
adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
|
|
}
|
|
|
|
/* linux (kernel and rootfs) */
|
|
if (cfe_size != 384 * 1024) {
|
|
adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size;
|
|
adm5120_cfe_parts[1].size = adm5120_cfe_parts[3].offset -
|
|
adm5120_cfe_parts[1].offset;
|
|
} else {
|
|
/* do not count the elf loader, which is on one block */
|
|
adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size +
|
|
adm5120_cfe_parts[3].size + mtd->erasesize;
|
|
adm5120_cfe_parts[1].size = size -
|
|
adm5120_cfe_parts[0].size -
|
|
(2*adm5120_cfe_parts[3].size) -
|
|
mtd->erasesize;
|
|
}
|
|
|
|
/* find and size rootfs */
|
|
if (find_root(mtd,size,&adm5120_cfe_parts[2])==0) {
|
|
/* entirely jffs2 */
|
|
adm5120_cfe_parts[4].name = NULL;
|
|
adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset -
|
|
adm5120_cfe_parts[3].size;
|
|
} else {
|
|
/* legacy setup */
|
|
/* calculate leftover flash, and assign it to the jffs2 partition */
|
|
if (cfe_size != 384 * 1024) {
|
|
adm5120_cfe_parts[4].offset = adm5120_cfe_parts[2].offset +
|
|
adm5120_cfe_parts[2].size;
|
|
if ((adm5120_cfe_parts[4].offset % mtd->erasesize) > 0) {
|
|
adm5120_cfe_parts[4].offset += mtd->erasesize -
|
|
(adm5120_cfe_parts[4].offset % mtd->erasesize);
|
|
}
|
|
adm5120_cfe_parts[4].size = adm5120_cfe_parts[3].offset -
|
|
adm5120_cfe_parts[4].offset;
|
|
} else {
|
|
adm5120_cfe_parts[4].offset = adm5120_cfe_parts[2].offset +
|
|
adm5120_cfe_parts[2].size;
|
|
if ((adm5120_cfe_parts[4].offset % mtd->erasesize) > 0) {
|
|
adm5120_cfe_parts[4].offset += mtd->erasesize -
|
|
(adm5120_cfe_parts[4].offset % mtd->erasesize);
|
|
}
|
|
adm5120_cfe_parts[4].size = size - adm5120_cfe_parts[3].size -
|
|
adm5120_cfe_parts[4].offset;
|
|
}
|
|
}
|
|
|
|
return adm5120_cfe_parts;
|
|
}
|
|
#endif
|
|
|
|
int __init init_adm5120_map(void)
|
|
{
|
|
size_t size;
|
|
int ret = 0;
|
|
#if defined (CONFIG_MTD_PARTITIONS) || (CONFIG_MTD_MYLOADER_PARTS)
|
|
struct mtd_partition *parts;
|
|
int i, parsed_nr_parts = 0;
|
|
#endif
|
|
printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE);
|
|
adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
|
|
|
|
if (!adm5120_map.virt) {
|
|
printk("Failed to ioremap\n");
|
|
return -EIO;
|
|
}
|
|
simple_map_init(&adm5120_map);
|
|
adm5120_map.read = adm5120_map_read;
|
|
adm5120_map.write = adm5120_map_write;
|
|
adm5120_map.copy_from = adm5120_map_copy_from;
|
|
|
|
if (!(adm5120_mtd = do_map_probe("cfi_probe", &adm5120_map))) {
|
|
printk("Failed to do_map_probe\n");
|
|
iounmap((void *)adm5120_map.virt);
|
|
return -ENXIO;
|
|
}
|
|
|
|
adm5120_mtd->owner = THIS_MODULE;
|
|
|
|
size = adm5120_mtd->size;
|
|
|
|
printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
|
|
|
|
#ifdef CONFIG_MTD_PARTITIONS
|
|
|
|
if (adm5120_info.boot_loader == BOOT_LOADER_CFE)
|
|
{
|
|
printk(KERN_NOTICE "adm5120 : using CFE flash mapping\n");
|
|
parts = init_mtd_partitions(adm5120_mtd, size);
|
|
|
|
for (i = 0; parts[i].name; i++);
|
|
ret = add_mtd_partitions(adm5120_mtd, parts, i);
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef CONFIG_MTD_MYLOADER_PARTS
|
|
if (adm5120_info.boot_loader == BOOT_LOADER_MYLOADER)
|
|
{
|
|
printk(KERN_NOTICE "adm5120 : using MyLoader flash mapping\n");
|
|
char *part_type;
|
|
|
|
if (parsed_nr_parts == 0) {
|
|
ret = parse_myloader_partitions(adm5120_mtd, &parts, 0);
|
|
|
|
if (ret > 0) {
|
|
part_type ="MyLoader";
|
|
parsed_nr_parts = ret;
|
|
}
|
|
}
|
|
ret = add_mtd_partitions(adm5120_mtd, parts, parsed_nr_parts);
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
return 0;
|
|
|
|
fail:
|
|
if (adm5120_mtd)
|
|
map_destroy(adm5120_mtd);
|
|
if (adm5120_map.virt)
|
|
iounmap((void *)adm5120_map.virt);
|
|
adm5120_map.virt = 0;
|
|
return ret;
|
|
}
|
|
|
|
void __exit cleanup_adm5120_map(void)
|
|
{
|
|
#ifdef CONFIG_MTD_PARTITIONS
|
|
del_mtd_partitions(adm5120_mtd);
|
|
#endif
|
|
map_destroy(adm5120_mtd);
|
|
iounmap((void *)adm5120_map.virt);
|
|
}
|
|
|
|
module_init(init_adm5120_map);
|
|
module_exit(cleanup_adm5120_map);
|