add new flash map driver, jffs2 is found, squashfs not.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@1829 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 161 insertions, 45 deletions

diff --git a/openwrt/target/linux/linux-2.6/patches/brcm/001-bcm947xx.patch b/openwrt/target/linux/linux-2.6/patches/brcm/001-bcm947xx.patch
index 3a4f78fc9f..225e1c044d 100644
--- a/openwrt/target/linux/linux-2.6/patches/brcm/001-bcm947xx.patch
+++ b/openwrt/target/linux/linux-2.6/patches/brcm/001-bcm947xx.patch
@@ -13123,14 +13123,45 @@ diff -Nur linux-2.6.12.5/drivers/mtd/maps/Makefile linux-2.6.12.5-brcm/drivers/m
  obj-$(CONFIG_MTD_SBC_GXX)	+= sbc_gxx.o
 diff -Nur linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.12.5-brcm/drivers/mtd/maps/bcm47xx-flash.c
 --- linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.12.5-brcm/drivers/mtd/maps/bcm47xx-flash.c	2005-08-28 17:01:50.948899632 +0200
-@@ -0,0 +1,131 @@
++++ linux-2.6.12.5-brcm/drivers/mtd/maps/bcm47xx-flash.c	2005-09-03 18:50:05.090478752 +0200
+@@ -0,0 +1,247 @@
 +/*
-+ * Flash mapping for BCM947XX boards
++ *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
++ *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
 + *
-+ * Copyright (C) 2001 Broadcom Corporation
++ *  original functions for finding root filesystem from Mike Baker 
 + *
-+ * $Id: bcm47xx-flash.c,v 1.1 2004/10/21 07:18:31 jolt Exp $
++ *  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.
++ *
++ *  $Id: bcm47xx-flash.c,v 1.1 2004/10/21 07:18:31 jolt Exp $
++ *
++ *  Flash mapping for BCM947XX boards
 + */
 +
 +#include <linux/init.h>
@@ -13142,6 +13173,14 @@ diff -Nur linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.12.5-brcm/dr
 +#include <linux/mtd/map.h>
 +#include <linux/mtd/partitions.h>
 +#include <linux/config.h>
++#include <typedefs.h>
++#include <bcmutils.h>
++#include <bcmnvram.h>
++#include <trxhdr.h>
++
++#ifdef CONFIG_MTD_PARTITIONS
++extern struct mtd_partition * init_mtd_partitions(struct mtd_info *mtd, size_t size);
++#endif
 +
 +#define WINDOW_ADDR 0x1c000000
 +#define WINDOW_SIZE (0x400000*2)
@@ -13176,49 +13215,110 @@ diff -Nur linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.12.5-brcm/dr
 +	phys: WINDOW_ADDR,
 +};
 +
-+#define SECTORS *64*1024
-+
 +#ifdef CONFIG_MTD_PARTITIONS
-+#if 0
-+static struct mtd_partition bcm947xx_parts[] = {
-+// 64 - 4 - 14 - 1 = 45 = 8 + 37
-+	{ name: "pmon",	offset: 0, size: 4 SECTORS, mask_flags: MTD_WRITEABLE },
-+	{ name: "linux", offset: MTDPART_OFS_APPEND, size: 14 SECTORS },
-+	{ name: "rescue", offset: MTDPART_OFS_APPEND, size: 8 SECTORS },
-+	{ name: "rootfs", offset: MTDPART_OFS_APPEND, size: 37 SECTORS },
-+	{ name: "nvram", offset: MTDPART_OFS_APPEND, size: 1 SECTORS, mask_flags: MTD_WRITEABLE },
-+};
-+#else
++
 +static struct mtd_partition bcm947xx_parts[] = {
-+ 	{ name: "cfe",
-+           offset:  0,
-+           size:  384*1024,
-+           mask_flags: MTD_WRITEABLE
-+         },
-+ 	{ name: "config",
-+           offset:  MTDPART_OFS_APPEND,
-+           size:  128*1024
-+         },
-+ 	{ name: "linux",
-+           offset:  MTDPART_OFS_APPEND,
-+           size:  10*128*1024
-+         },
-+ 	{ name: "jffs",
-+           offset: MTDPART_OFS_APPEND,
-+           size: (8*1024*1024)-((384*1024)+(128*1024)+(10*128*1024)+(128*1024)),
-+         },
-+ 	{ name: "nvram",
-+           offset: MTDPART_OFS_APPEND,
-+           size: 128*1024,
-+           mask_flags: MTD_WRITEABLE
-+         },
++	{ 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, },
 +};
-+#endif
++
++static int __init
++find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
++{
++	struct trx_header *trx;
++	unsigned char buf[512];
++	int off;
++	size_t len;
++
++	trx = (struct trx_header *) buf;
++
++	printk(KERN_NOTICE 
++		"MTD erasesize: %d, Size: %d\n", 
++		mtd->erasesize, size);
++
++	for (off = (384*1024); off < size; off += mtd->erasesize) {
++		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) {
++			printk(KERN_NOTICE "Found TRX Header!\n");
++
++			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 done;
++		}
++	}
++
++	printk(KERN_NOTICE
++	       "%s: Couldn't find root filesystem\n",
++	       mtd->name);
++	return -1;
++
++ done:
++		return part->size;
++}
++
++struct mtd_partition * __init
++init_mtd_partitions(struct mtd_info *mtd, size_t size)
++{
++
++	/* boot loader */
++	bcm947xx_parts[0].offset=0;
++	bcm947xx_parts[0].size=384*1024;
++
++	/* nvram */
++	bcm947xx_parts[3].offset = size - (128*1024);
++	bcm947xx_parts[3].size   = size - bcm947xx_parts[3].offset;
++
++	/* Size linux (kernel and rootfs) */
++	bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
++	bcm947xx_parts[1].size   = bcm947xx_parts[3].offset - bcm947xx_parts[1].offset;
++
++	/* Find and size rootfs */
++	if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
++		/* entirely jffs2 */
++		bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset; 
++		bcm947xx_parts[4].name = NULL;
++	} else {
++		/* legacy setup */
++		/* calculate leftover flash, and assign it to the jffs2 partition */
++		bcm947xx_parts[4].offset = bcm947xx_parts[2].offset + bcm947xx_parts[2].size;
++		bcm947xx_parts[4].offset = ROUNDUP(bcm947xx_parts[4].offset, mtd->erasesize);
++		bcm947xx_parts[4].size = bcm947xx_parts[3].offset - bcm947xx_parts[4].offset;
++	}
++
++	return bcm947xx_parts;
++}
++
++EXPORT_SYMBOL(init_mtd_partitions);
 +#endif
 +
 +int __init init_bcm947xx_map(void)
 +{
-+	bcm947xx_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
++	size_t size;
++	int ret = 0;
++#ifdef CONFIG_MTD_PARTITIONS
++	struct mtd_partition *parts;
++	int i;
++#endif
++
++	bcm947xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
 +
 +	if (!bcm947xx_map.virt) {
 +		printk("Failed to ioremap\n");
@@ -13236,13 +13336,29 @@ diff -Nur linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.12.5-brcm/dr
 +
 +	bcm947xx_mtd->owner = THIS_MODULE;
 +
-+	printk(KERN_NOTICE "flash device: %x at %x\n", bcm947xx_mtd->size, WINDOW_ADDR);
++	size = bcm947xx_mtd->size;
++
++	printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", bcm947xx_mtd->size, WINDOW_ADDR);
 +
 +#ifdef CONFIG_MTD_PARTITIONS
-+	return add_mtd_partitions(bcm947xx_mtd, bcm947xx_parts, sizeof(bcm947xx_parts)/sizeof(bcm947xx_parts[0]));
-+#else
-+	return 0;
++	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.map_priv_1)
++		iounmap((void *) bcm947xx_map.map_priv_1);
++	bcm947xx_map.map_priv_1 = 0;
++	return ret;
 +}
 +
 +void __exit cleanup_bcm947xx_map(void)