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503 lines
15 KiB
503 lines
15 KiB
diff -urN linux.old/drivers/mtd/maps/bcm47xx-flash.c linux.dev/drivers/mtd/maps/bcm47xx-flash.c
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--- linux.old/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux.dev/drivers/mtd/maps/bcm47xx-flash.c 2007-01-03 02:26:02.000000000 +0100
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@@ -0,0 +1,471 @@
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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/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/squashfs_fs.h>
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+#include <linux/jffs2.h>
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+#include <linux/crc32.h>
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+#include <linux/ssb.h>
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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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+extern struct ssb_bus ssb;
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+static struct mtd_info *bcm947xx_mtd;
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+
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+static void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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+{
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+#define MIPS_MEMCPY_ALIGN 4
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+ map_word ret;
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+ ssize_t transfer;
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+ ssize_t done = 0;
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+ if ((len >= MIPS_MEMCPY_ALIGN) && (!(from & (MIPS_MEMCPY_ALIGN - 1))) && (!(((unsigned int)to & (MIPS_MEMCPY_ALIGN - 1))))) {
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+ done = len & ~(MIPS_MEMCPY_ALIGN - 1);
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+ memcpy_fromio(to, map->virt + from, done);
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+ }
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+ while (done < len) {
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+ ret = map->read(map, from + done);
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+ transfer = len - done;
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+ if (transfer > map->bankwidth)
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+ transfer = map->bankwidth;
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+ memcpy((void *)((unsigned long)to + done), &ret.x[0], transfer);
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+ done += transfer;
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+ }
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+}
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+
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+static struct map_info bcm947xx_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 bcm947xx_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: "OpenWrt", 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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+ if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
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+ printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used);
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+
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+ /* Update the squashfs partition size based on the superblock info */
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+ part->size = sb->bytes_used;
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+ len = part->offset + part->size;
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+ len += (mtd->erasesize - 1);
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+ len &= ~(mtd->erasesize - 1);
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+ part->size = len - part->offset;
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+ } else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) {
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+ printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name);
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+
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+ /* Move the squashfs outside of the trx */
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+ part->size = 0;
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+ } else {
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+ printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name);
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+ return 0;
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+ }
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+ bcm947xx_parts[0].offset = 0;
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+ bcm947xx_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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+ bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
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+ bcm947xx_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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+ bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
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+ bcm947xx_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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+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
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+ bcm947xx_parts[1].size = bcm947xx_parts[3].offset -
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+ bcm947xx_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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+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size +
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+ bcm947xx_parts[3].size + mtd->erasesize;
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+ bcm947xx_parts[1].size = size -
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+ bcm947xx_parts[0].size -
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+ (2*bcm947xx_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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+ if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
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+ /* entirely jffs2 */
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+ bcm947xx_parts[4].name = NULL;
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+ bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
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+ bcm947xx_parts[3].size;
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+ } else {
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+ /* legacy setup */
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+ /* calculate leftover flash, and assign it to the jffs2 partition */
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+ if (cfe_size != 384 * 1024) {
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+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
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+ bcm947xx_parts[2].size;
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+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
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+ bcm947xx_parts[4].offset += mtd->erasesize -
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+ (bcm947xx_parts[4].offset % mtd->erasesize);
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+ }
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+ bcm947xx_parts[4].size = bcm947xx_parts[3].offset -
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+ bcm947xx_parts[4].offset;
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+ } else {
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+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
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+ bcm947xx_parts[2].size;
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+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
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+ bcm947xx_parts[4].offset += mtd->erasesize -
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+ (bcm947xx_parts[4].offset % mtd->erasesize);
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+ }
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+ bcm947xx_parts[4].size = size - bcm947xx_parts[3].size -
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+ bcm947xx_parts[4].offset;
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+ }
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+ }
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+
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+ return bcm947xx_parts;
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+}
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+#endif
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+
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+int __init init_bcm947xx_map(void)
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+{
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+ struct ssb_mipscore *mcore = &ssb.mipscore;
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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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+ 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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+ bcm947xx_map.virt = ioremap(window, window_size);
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+
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+ if (!bcm947xx_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(&bcm947xx_map);
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+
|
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+ bcm947xx_map.copy_from = bcm947xx_map_copy_from;
|
|
+
|
|
+ if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
|
|
+ printk("Failed to do_map_probe\n");
|
|
+ iounmap((void *)bcm947xx_map.virt);
|
|
+ return -ENXIO;
|
|
+ }
|
|
+
|
|
+ bcm947xx_mtd->owner = THIS_MODULE;
|
|
+
|
|
+ size = bcm947xx_mtd->size;
|
|
+
|
|
+ printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
|
|
+
|
|
+#ifdef CONFIG_MTD_PARTITIONS
|
|
+ parts = init_mtd_partitions(bcm947xx_mtd, size);
|
|
+ for (i = 0; parts[i].name; i++);
|
|
+ ret = add_mtd_partitions(bcm947xx_mtd, parts, i);
|
|
+ if (ret) {
|
|
+ printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
|
|
+ goto fail;
|
|
+ }
|
|
+#endif
|
|
+ return 0;
|
|
+
|
|
+ fail:
|
|
+ if (bcm947xx_mtd)
|
|
+ map_destroy(bcm947xx_mtd);
|
|
+ if (bcm947xx_map.virt)
|
|
+ iounmap((void *)bcm947xx_map.virt);
|
|
+ bcm947xx_map.virt = 0;
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+void __exit cleanup_bcm947xx_map(void)
|
|
+{
|
|
+#ifdef CONFIG_MTD_PARTITIONS
|
|
+ del_mtd_partitions(bcm947xx_mtd);
|
|
+#endif
|
|
+ map_destroy(bcm947xx_mtd);
|
|
+ iounmap((void *)bcm947xx_map.virt);
|
|
+}
|
|
+
|
|
+module_init(init_bcm947xx_map);
|
|
+module_exit(cleanup_bcm947xx_map);
|
|
diff -urN linux.old/drivers/mtd/maps/Kconfig linux.dev/drivers/mtd/maps/Kconfig
|
|
--- linux.old/drivers/mtd/maps/Kconfig 2006-12-11 20:32:53.000000000 +0100
|
|
+++ linux.dev/drivers/mtd/maps/Kconfig 2007-01-03 02:26:02.000000000 +0100
|
|
@@ -299,6 +299,12 @@
|
|
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 && BCM947XX
|
|
+ help
|
|
+ Support for the flash chips on the BCM947xx board.
|
|
+
|
|
config MTD_BEECH
|
|
tristate "CFI Flash device mapped on IBM 405LP Beech"
|
|
depends on MTD_CFI && BEECH
|
|
diff -urN linux.old/drivers/mtd/maps/Makefile linux.dev/drivers/mtd/maps/Makefile
|
|
--- linux.old/drivers/mtd/maps/Makefile 2006-12-11 20:32:53.000000000 +0100
|
|
+++ linux.dev/drivers/mtd/maps/Makefile 2007-01-03 02:26:02.000000000 +0100
|
|
@@ -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_IPAQ) += ipaq-flash.o
|
|
obj-$(CONFIG_MTD_SBC_GXX) += sbc_gxx.o
|
|
|
|
|