-diff -urN linux.old/drivers/mtd/maps/bcm47xx-flash.c linux.dev/drivers/mtd/maps/bcm47xx-flash.c
---- linux.old/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
-+++ linux.dev/drivers/mtd/maps/bcm47xx-flash.c 2007-01-03 02:26:02.000000000 +0100
-@@ -0,0 +1,471 @@
-+/*
-+ * 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 BCM947XX 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 <linux/ssb.h>
-+#include <asm/io.h>
-+
-+
-+#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
-+
-+extern struct ssb_bus ssb;
-+static struct mtd_info *bcm947xx_mtd;
-+
-+static void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-+{
-+#define MIPS_MEMCPY_ALIGN 4
-+ map_word ret;
-+ ssize_t transfer;
-+ ssize_t done = 0;
-+ if ((len >= MIPS_MEMCPY_ALIGN) && (!(from & (MIPS_MEMCPY_ALIGN - 1))) && (!(((unsigned int)to & (MIPS_MEMCPY_ALIGN - 1))))) {
-+ done = len & ~(MIPS_MEMCPY_ALIGN - 1);
-+ memcpy_fromio(to, map->virt + from, done);
-+ }
-+ while (done < len) {
-+ ret = map->read(map, from + done);
-+ transfer = len - done;
-+ if (transfer > map->bankwidth)
-+ transfer = map->bankwidth;
-+ memcpy((void *)((unsigned long)to + done), &ret.x[0], transfer);
-+ done += transfer;
-+ }
-+}
-+
-+static struct map_info bcm947xx_map = {
-+ name: "Physically mapped flash",
-+ size: WINDOW_SIZE,
-+ bankwidth: BUSWIDTH,
-+ phys: WINDOW_ADDR,
-+};
-+
-+#ifdef CONFIG_MTD_PARTITIONS
-+
-+static struct mtd_partition bcm947xx_parts[] = {
-+ { name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
-+ { name: "linux", offset: 0, size: 0, },
-+ { name: "rootfs", offset: 0, size: 0, },
-+ { name: "nvram", offset: 0, size: 0, },
-+ { name: "OpenWrt", offset: 0, size: 0, },
-+ { name: NULL, },
-+};
-+
-+static 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 */
-+ bcm947xx_parts[0].offset = 0;
-+ bcm947xx_parts[0].size = cfe_size;
-+
-+ /* nvram */
-+ if (cfe_size != 384 * 1024) {
-+ bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-+ } else {
-+ /* nvram (old 128kb config partition on netgear wgt634u) */
-+ bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
-+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-+ }
-+
-+ /* linux (kernel and rootfs) */
-+ if (cfe_size != 384 * 1024) {
-+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
-+ bcm947xx_parts[1].size = bcm947xx_parts[3].offset -
-+ bcm947xx_parts[1].offset;
-+ } else {
-+ /* do not count the elf loader, which is on one block */
-+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size +
-+ bcm947xx_parts[3].size + mtd->erasesize;
-+ bcm947xx_parts[1].size = size -
-+ bcm947xx_parts[0].size -
-+ (2*bcm947xx_parts[3].size) -
-+ mtd->erasesize;
-+ }
-+
-+ /* find and size rootfs */
-+ if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
-+ /* entirely jffs2 */
-+ bcm947xx_parts[4].name = NULL;
-+ bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
-+ bcm947xx_parts[3].size;
-+ } else {
-+ /* legacy setup */
-+ /* calculate leftover flash, and assign it to the jffs2 partition */
-+ if (cfe_size != 384 * 1024) {
-+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
-+ bcm947xx_parts[2].size;
-+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
-+ bcm947xx_parts[4].offset += mtd->erasesize -
-+ (bcm947xx_parts[4].offset % mtd->erasesize);
-+ }
-+ bcm947xx_parts[4].size = bcm947xx_parts[3].offset -
-+ bcm947xx_parts[4].offset;
-+ } else {
-+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
-+ bcm947xx_parts[2].size;
-+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
-+ bcm947xx_parts[4].offset += mtd->erasesize -
-+ (bcm947xx_parts[4].offset % mtd->erasesize);
-+ }
-+ bcm947xx_parts[4].size = size - bcm947xx_parts[3].size -
-+ bcm947xx_parts[4].offset;
-+ }
-+ }
-+
-+ return bcm947xx_parts;
-+}
-+#endif
-+
-+int __init init_bcm947xx_map(void)
-+{
-+ struct ssb_mipscore *mcore = &ssb.mipscore;
-+ size_t size;
-+ int ret = 0;
-+#ifdef CONFIG_MTD_PARTITIONS
-+ struct mtd_partition *parts;
-+ int i;
-+#endif
-+ u32 window = mcore->flash_window;
-+ u32 window_size = mcore->flash_window_size;
-+
-+ printk("flash init: 0x%08x 0x%08x\n", window, window_size);
-+ bcm947xx_map.virt = ioremap(window, window_size);
-+
-+ if (!bcm947xx_map.virt) {
-+ printk("Failed to ioremap\n");
-+ return -EIO;
-+ }
-+ simple_map_init(&bcm947xx_map);
-+
-+ 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);
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