mirror of https://github.com/hak5/openwrt-owl.git
Gabor Juhos
parent
1cea8d99bf
commit
a15a86ce3f
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@ -1,497 +0,0 @@
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/*
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* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
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* Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
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* Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
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*
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* original functions for finding root filesystem from Mike Baker
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Copyright 2001-2003, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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* Flash mapping for ADM5120 boards
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/wait.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/map.h>
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#include <linux/sched.h>
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#ifdef CONFIG_MTD_PARTITIONS
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#include <linux/mtd/partitions.h>
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#endif
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#include <linux/squashfs_fs.h>
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#include <linux/jffs2.h>
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#include <linux/crc32.h>
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#include <asm/io.h>
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#include <asm/mach-adm5120/myloader.h>
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#include <asm/mach-adm5120/adm5120_info.h>
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extern int parse_myloader_partitions(struct mtd_info *master,
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struct mtd_partition **pparts,
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unsigned long origin);
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/* Macros for switching flash bank
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ADM5120 only support 2MB flash address space
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so GPIO5 is used as A20
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*/
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#define GPIO_IO ((volatile unsigned long *)0xb20000b8)
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#define FLASH_A20_GPIO 5
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#define FLASH_BOUNDARY 0x200000
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#define TRX_MAGIC 0x30524448 /* "HDR0" */
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#define TRX_VERSION 1
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#define TRX_MAX_LEN 0x3A0000
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#define TRX_NO_HEADER 1 /* Do not write TRX header */
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#define TRX_GZ_FILES 0x2 /* Contains up to TRX_MAX_OFFSET individual gzip files */
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#define TRX_MAX_OFFSET 3
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struct trx_header {
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u32 magic; /* "HDR0" */
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u32 len; /* Length of file including header */
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u32 crc32; /* 32-bit CRC from flag_version to end of file */
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u32 flag_version; /* 0:15 flags, 16:31 version */
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u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */
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};
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#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y))
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#define NVRAM_SPACE 0x8000
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#define WINDOW_ADDR 0x1fc00000
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#define WINDOW_SIZE 0x400000
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#define BUSWIDTH 2
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static struct mtd_info *adm5120_mtd;
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static struct map_info adm5120_map = {
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name: "adm5120 physically mapped flash",
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size: WINDOW_SIZE,
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bankwidth: BUSWIDTH,
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phys: WINDOW_ADDR,
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};
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#ifdef CONFIG_MTD_PARTITIONS
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static struct mtd_partition adm5120_cfe_parts[] = {
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{ name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
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{ name: "linux", offset: 0, size: 0, },
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{ name: "rootfs", offset: 0, size: 0, },
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{ name: "nvram", offset: 0, size: 0, },
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{ name: NULL, },
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};
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static void flash_switch_bank(unsigned long addr)
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{
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unsigned long val;
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/* Set GPIO as output */
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val = *GPIO_IO | (1 << (FLASH_A20_GPIO+16));
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if ( addr & FLASH_BOUNDARY ) {
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val |= 1 << (FLASH_A20_GPIO + 24);
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} else {
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val &= ~(1 << (FLASH_A20_GPIO + 24));
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}
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*GPIO_IO = val;
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}
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static map_word adm5120_map_read(struct map_info *map, unsigned long ofs)
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{
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flash_switch_bank(ofs);
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return inline_map_read(map, ofs);
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}
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static void adm5120_map_write(struct map_info *map, const map_word datum, unsigned long ofs)
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{
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flash_switch_bank(ofs);
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inline_map_write(map, datum, ofs);
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}
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static void adm5120_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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{
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ssize_t tmp;
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if (from < FLASH_BOUNDARY) {
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tmp = (len < (FLASH_BOUNDARY - from)) ? len : (FLASH_BOUNDARY - from);
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flash_switch_bank(0);
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inline_map_copy_from(map, to, from, tmp);
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to = (void *)((char *)to + tmp);
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from += tmp;
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len -= tmp;
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}
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if (len > 0) {
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flash_switch_bank(FLASH_BOUNDARY);
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inline_map_copy_from(map, to, from, len);
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}
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}
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static int __init
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find_cfe_size(struct mtd_info *mtd, size_t size)
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{
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struct trx_header *trx;
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unsigned char buf[512];
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int off;
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size_t len;
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int blocksize;
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trx = (struct trx_header *) buf;
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blocksize = mtd->erasesize;
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if (blocksize < 0x10000)
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blocksize = 0x10000;
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for (off = (128*1024); off < size; off += blocksize) {
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memset(buf, 0xe5, sizeof(buf));
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/*
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* Read into buffer
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*/
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if (mtd->read(mtd, off, sizeof(buf), &len, buf) ||
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len != sizeof(buf))
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continue;
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/* found a TRX header */
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if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
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goto found;
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}
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}
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printk(KERN_NOTICE
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"%s: Couldn't find bootloader size\n",
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mtd->name);
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return -1;
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found:
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printk(KERN_NOTICE "bootloader size: %d\n", off);
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return off;
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}
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/*
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* Copied from mtdblock.c
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*
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* Cache stuff...
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*
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* Since typical flash erasable sectors are much larger than what Linux's
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* buffer cache can handle, we must implement read-modify-write on flash
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* sectors for each block write requests. To avoid over-erasing flash sectors
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* and to speed things up, we locally cache a whole flash sector while it is
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* being written to until a different sector is required.
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*/
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static void erase_callback(struct erase_info *done)
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{
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wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
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wake_up(wait_q);
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}
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static int erase_write (struct mtd_info *mtd, unsigned long pos,
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int len, const char *buf)
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{
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struct erase_info erase;
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DECLARE_WAITQUEUE(wait, current);
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wait_queue_head_t wait_q;
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size_t retlen;
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int ret;
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/*
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* First, let's erase the flash block.
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*/
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init_waitqueue_head(&wait_q);
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erase.mtd = mtd;
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erase.callback = erase_callback;
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erase.addr = pos;
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erase.len = len;
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erase.priv = (u_long)&wait_q;
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set_current_state(TASK_INTERRUPTIBLE);
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add_wait_queue(&wait_q, &wait);
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ret = mtd->erase(mtd, &erase);
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if (ret) {
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set_current_state(TASK_RUNNING);
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remove_wait_queue(&wait_q, &wait);
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printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
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"on \"%s\" failed\n",
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pos, len, mtd->name);
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return ret;
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}
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schedule(); /* Wait for erase to finish. */
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remove_wait_queue(&wait_q, &wait);
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/*
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* Next, writhe data to flash.
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*/
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ret = mtd->write (mtd, pos, len, &retlen, buf);
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if (ret)
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return ret;
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if (retlen != len)
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return -EIO;
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return 0;
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}
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static int __init
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find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
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{
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struct trx_header trx, *trx2;
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unsigned char buf[512], *block;
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int off, blocksize;
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u32 i, crc = ~0;
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size_t len;
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struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
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blocksize = mtd->erasesize;
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if (blocksize < 0x10000)
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blocksize = 0x10000;
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for (off = (128*1024); off < size; off += blocksize) {
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memset(&trx, 0xe5, sizeof(trx));
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/*
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* Read into buffer
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*/
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if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) ||
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len != sizeof(trx))
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continue;
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/* found a TRX header */
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if (le32_to_cpu(trx.magic) == TRX_MAGIC) {
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part->offset = le32_to_cpu(trx.offsets[2]) ? :
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le32_to_cpu(trx.offsets[1]);
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part->size = le32_to_cpu(trx.len);
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part->size -= part->offset;
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part->offset += off;
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goto found;
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}
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}
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printk(KERN_NOTICE
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"%s: Couldn't find root filesystem\n",
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mtd->name);
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return -1;
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found:
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if (part->size == 0)
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return 0;
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if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf))
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return 0;
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/* Move the fs outside of the trx */
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part->size = 0;
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if (trx.len != part->offset + part->size - off) {
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/* Update the trx offsets and length */
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trx.len = part->offset + part->size - off;
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/* Update the trx crc32 */
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for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) {
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if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf))
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return 0;
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crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i));
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}
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trx.crc32 = crc;
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/* read first eraseblock from the trx */
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block = kmalloc(mtd->erasesize, GFP_KERNEL);
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trx2 = (struct trx_header *) block;
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if (mtd->read(mtd, off, mtd->erasesize, &len, block) || len != mtd->erasesize) {
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printk("Error accessing the first trx eraseblock\n");
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return 0;
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}
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printk("Updating TRX offsets and length:\n");
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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);
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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);
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/* Write updated trx header to the flash */
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memcpy(block, &trx, sizeof(trx));
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if (mtd->unlock)
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mtd->unlock(mtd, off, mtd->erasesize);
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erase_write(mtd, off, mtd->erasesize, block);
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if (mtd->sync)
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mtd->sync(mtd);
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kfree(block);
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printk("Done\n");
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}
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return part->size;
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}
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struct mtd_partition * __init
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init_mtd_partitions(struct mtd_info *mtd, size_t size)
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{
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int cfe_size;
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if ((cfe_size = find_cfe_size(mtd,size)) < 0)
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return NULL;
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/* boot loader */
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adm5120_cfe_parts[0].offset = 0;
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adm5120_cfe_parts[0].size = cfe_size;
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/* nvram */
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if (cfe_size != 384 * 1024) {
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adm5120_cfe_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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} else {
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/* nvram (old 128kb config partition on netgear wgt634u) */
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adm5120_cfe_parts[3].offset = adm5120_cfe_parts[0].size;
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adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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}
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/* linux (kernel and rootfs) */
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if (cfe_size != 384 * 1024) {
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adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size;
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adm5120_cfe_parts[1].size = adm5120_cfe_parts[3].offset -
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adm5120_cfe_parts[1].offset;
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} else {
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/* do not count the elf loader, which is on one block */
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adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size +
|
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adm5120_cfe_parts[3].size + mtd->erasesize;
|
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adm5120_cfe_parts[1].size = size -
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adm5120_cfe_parts[0].size -
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(2*adm5120_cfe_parts[3].size) -
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mtd->erasesize;
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}
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/* find and size rootfs */
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find_root(mtd,size,&adm5120_cfe_parts[2]);
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adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset - adm5120_cfe_parts[3].size;
|
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return adm5120_cfe_parts;
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}
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#endif
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int __init init_adm5120_map(void)
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{
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size_t size;
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int ret = 0;
|
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#if defined (CONFIG_MTD_PARTITIONS) || (CONFIG_MTD_MYLOADER_PARTS)
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struct mtd_partition *parts;
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int i, parsed_nr_parts = 0;
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#endif
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if (adm5120_nand_boot)
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return -ENODEV;
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printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, adm5120_board.flash0_size);
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adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, adm5120_board.flash0_size);
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if (!adm5120_map.virt) {
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printk("Failed to ioremap\n");
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return -EIO;
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}
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simple_map_init(&adm5120_map);
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adm5120_map.read = adm5120_map_read;
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adm5120_map.write = adm5120_map_write;
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adm5120_map.copy_from = adm5120_map_copy_from;
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if (!(adm5120_mtd = do_map_probe("cfi_probe", &adm5120_map))) {
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printk("Failed to do_map_probe\n");
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iounmap((void *)adm5120_map.virt);
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return -ENXIO;
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}
|
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adm5120_mtd->owner = THIS_MODULE;
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size = adm5120_mtd->size;
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printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
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#ifdef CONFIG_MTD_PARTITIONS
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if (adm5120_boot_loader == BOOT_LOADER_CFE || adm5120_boot_loader == BOOT_LOADER_UNKNOWN)
|
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{
|
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printk(KERN_NOTICE "adm5120 : using CFE flash mapping\n");
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parts = init_mtd_partitions(adm5120_mtd, size);
|
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|
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for (i = 0; parts[i].name; i++);
|
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ret = add_mtd_partitions(adm5120_mtd, parts, i);
|
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|
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if (ret) {
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printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
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goto fail;
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}
|
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}
|
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#endif
|
||||
#ifdef CONFIG_MTD_MYLOADER_PARTS
|
||||
if (adm5120_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);
|
||||
Loading…
Reference in New Issue