+++ /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 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: 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_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_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);
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