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+diff -Nur linux-2.6.34.orig/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.34/drivers/mtd/maps/bcm47xx-flash.c
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+--- linux-2.6.34.orig/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
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+@@ -0,0 +1,402 @@
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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 BCM947XX boards
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++ */
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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/sched.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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++#ifdef CONFIG_MTD_PARTITIONS
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++#include <linux/mtd/partitions.h>
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++#endif
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++#include <linux/crc32.h>
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++#ifdef CONFIG_SSB
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++#include <linux/ssb/ssb.h>
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++#endif
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++#include <asm/io.h>
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++
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++
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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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++
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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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++
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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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++
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++#ifdef CONFIG_SSB
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++extern struct ssb_bus ssb_bcm47xx;
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++#endif
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++static struct mtd_info *bcm47xx_mtd;
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++
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++static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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++{
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++ if (len==1) {
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++ memcpy_fromio(to, map->virt + from, len);
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++ } else {
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++ int i;
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++ u16 *dest = (u16 *) to;
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++ u16 *src = (u16 *) (map->virt + from);
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++ for (i = 0; i < (len / 2); i++) {
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++ dest[i] = src[i];
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++ }
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++ if (len & 1)
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++ *((u8 *)dest+len-1) = src[i] & 0xff;
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++ }
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++}
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++
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++static struct map_info bcm47xx_map = {
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++ name: "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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++
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++#ifdef CONFIG_MTD_PARTITIONS
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++
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++static struct mtd_partition bcm47xx_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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++
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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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++
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++ trx = (struct trx_header *) buf;
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++
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++ blocksize = mtd->erasesize;
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++ if (blocksize < 0x10000)
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++ blocksize = 0x10000;
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++
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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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++ /*
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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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++
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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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++
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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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++
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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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++
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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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++
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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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++
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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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++ /*
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++ * First, let's erase the flash block.
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++ */
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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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++
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++ set_current_state(TASK_INTERRUPTIBLE);
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++ add_wait_queue(&wait_q, &wait);
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++
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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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++
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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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++ /*
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++ * Next, writhe data to flash.
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++ */
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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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++
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++
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++
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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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++
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++ blocksize = mtd->erasesize;
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++ if (blocksize < 0x10000)
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++ blocksize = 0x10000;
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++
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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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++ /*
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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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++
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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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++
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++ part->size -= part->offset;
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++ part->offset += off;
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++
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++ goto found;
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++ }
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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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++
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++ found:
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++ if (part->size == 0)
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++ return 0;
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++
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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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++
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++ return part->size;
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++}
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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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++
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++ if ((cfe_size = find_cfe_size(mtd,size)) < 0)
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++ return NULL;
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++
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++ /* boot loader */
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++ bcm47xx_parts[0].offset = 0;
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++ bcm47xx_parts[0].size = cfe_size;
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++
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++ /* nvram */
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++ if (cfe_size != 384 * 1024) {
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++ bcm47xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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++ bcm47xx_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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++ bcm47xx_parts[3].offset = bcm47xx_parts[0].size;
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++ bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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++ }
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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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++ bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
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++ bcm47xx_parts[1].size = bcm47xx_parts[3].offset -
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++ bcm47xx_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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++ bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
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++ bcm47xx_parts[3].size + mtd->erasesize;
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++ bcm47xx_parts[1].size = size -
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++ bcm47xx_parts[0].size -
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++ (2*bcm47xx_parts[3].size) -
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++ mtd->erasesize;
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++ }
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++
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++ /* find and size rootfs */
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++ find_root(mtd,size,&bcm47xx_parts[2]);
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++ bcm47xx_parts[2].size = size - bcm47xx_parts[2].offset - bcm47xx_parts[3].size;
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++
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++ return bcm47xx_parts;
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++}
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++#endif
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++
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++int __init init_bcm47xx_map(void)
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++{
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++#ifdef CONFIG_SSB
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++ struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
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++#endif
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++ size_t size;
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++ int ret = 0;
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++#ifdef CONFIG_MTD_PARTITIONS
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++ struct mtd_partition *parts;
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++ int i;
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++#endif
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++
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++#ifdef CONFIG_SSB
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++ u32 window = mcore->flash_window;
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++ u32 window_size = mcore->flash_window_size;
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++
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++ printk("flash init: 0x%08x 0x%08x\n", window, window_size);
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++ bcm47xx_map.phys = window;
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++ bcm47xx_map.size = window_size;
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++ bcm47xx_map.bankwidth = mcore->flash_buswidth;
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++ bcm47xx_map.virt = ioremap_nocache(window, window_size);
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++#else
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++ printk("flash init: 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE);
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++ bcm47xx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
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++#endif
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++
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++ if (!bcm47xx_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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++
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++ simple_map_init(&bcm47xx_map);
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++
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++ if (!(bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map))) {
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++ printk("Failed to do_map_probe\n");
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++ iounmap((void *)bcm47xx_map.virt);
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++ return -ENXIO;
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++ }
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++
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++ /* override copy_from routine */
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++ //bcm47xx_map.copy_from = bcm47xx_map_copy_from;
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++
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++ bcm47xx_mtd->owner = THIS_MODULE;
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++
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++ size = bcm47xx_mtd->size;
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++
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++ printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
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++
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++#ifdef CONFIG_MTD_PARTITIONS
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++ parts = init_mtd_partitions(bcm47xx_mtd, size);
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++ for (i = 0; parts[i].name; i++);
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++ ret = add_mtd_partitions(bcm47xx_mtd, parts, i);
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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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++#endif
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++ return 0;
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++
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++ fail:
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++ if (bcm47xx_mtd)
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++ map_destroy(bcm47xx_mtd);
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++ if (bcm47xx_map.virt)
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++ iounmap((void *)bcm47xx_map.virt);
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++ bcm47xx_map.virt = 0;
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|
|
++ return ret;
|
|
|
++}
|
|
|
++
|
|
|
++void __exit cleanup_bcm47xx_map(void)
|
|
|
++{
|
|
|
++#ifdef CONFIG_MTD_PARTITIONS
|
|
|
++ del_mtd_partitions(bcm47xx_mtd);
|
|
|
++#endif
|
|
|
++ map_destroy(bcm47xx_mtd);
|
|
|
++ iounmap((void *)bcm47xx_map.virt);
|
|
|
++}
|
|
|
++
|
|
|
++module_init(init_bcm47xx_map);
|
|
|
++module_exit(cleanup_bcm47xx_map);
|
|
|
+diff -Nur linux-2.6.34.orig/drivers/mtd/maps/Kconfig linux-2.6.34/drivers/mtd/maps/Kconfig
|
|
|
+--- linux-2.6.34.orig/drivers/mtd/maps/Kconfig 2010-05-16 23:17:36.000000000 +0200
|
|
|
|
|
|
+@@ -319,6 +319,12 @@
|
|
|
+ Mapping for the Flaga digital module. If you don't have one, ignore
|
|
|
+ this setting.
|
|
|
+
|
|
|
++config MTD_BCM47XX
|
|
|
++ tristate "BCM47xx flash device"
|
|
|
++ depends on MIPS && MTD_CFI && BCM47XX
|
|
|
++ help
|
|
|
++ Support for the flash chips on the BCM947xx board.
|
|
|
++
|
|
|
+ config MTD_REDWOOD
|
|
|
+ tristate "CFI Flash devices mapped on IBM Redwood"
|
|
|
+ depends on MTD_CFI && ( REDWOOD_4 || REDWOOD_5 || REDWOOD_6 )
|
|
|
+diff -Nur linux-2.6.34.orig/drivers/mtd/maps/Makefile linux-2.6.34/drivers/mtd/maps/Makefile
|
|
|
+--- linux-2.6.34.orig/drivers/mtd/maps/Makefile 2010-05-16 23:17:36.000000000 +0200
|
|
|
|
|
|
+@@ -29,6 +29,7 @@
|
|
|
+ obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
|
|
|
+ obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o
|
|
|
+ obj-$(CONFIG_MTD_TQM8XXL) += tqm8xxl.o
|
|
|
++obj-$(CONFIG_MTD_BCM47XX) += bcm47xx-flash.o
|
|
|
+ obj-$(CONFIG_MTD_SA1100) += sa1100-flash.o
|
|
|
+ obj-$(CONFIG_MTD_SBC_GXX) += sbc_gxx.o
|
|
|
+ obj-$(CONFIG_MTD_SC520CDP) += sc520cdp.o
|