add new flash map driver, some minor system code cleanup

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@2564 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 360 insertions, 0 deletions

diff --git a/target/linux/linux-2.6/patches/brcm/002-flash-map.patch b/target/linux/linux-2.6/patches/brcm/002-flash-map.patch
new file mode 100644
index 000000000..406255b64
--- /dev/null
+++ b/target/linux/linux-2.6/patches/brcm/002-flash-map.patch
@@ -0,0 +1,360 @@
+diff -Nur linux-2.6.12.5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.12.5-flash/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-flash/drivers/mtd/maps/bcm47xx-flash.c	2005-11-06 20:36:42.553198500 +0100
+@@ -0,0 +1,329 @@
++/*
++ *  Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
++ *  Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.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.
++ *
++ *  $Id: bcm47xx-flash.c,v 1.1 2004/10/21 07:18:31 jolt Exp $
++ *
++ *  Flash mapping for BCM947XX boards
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <asm/io.h>
++#include <linux/mtd/mtd.h>
++#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)
++#define BUSWIDTH 2
++
++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 cfe_size_flag;
++
++	trx = (struct trx_header *) buf;
++
++	cfe_size_flag=0;
++
++	for (off = (256*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) {
++			goto done;
++		}
++		cfe_size_flag += 1;
++	}
++
++	printk(KERN_NOTICE
++	       "%s: Couldn't find bootloader size\n",
++	       mtd->name);
++	return -1;
++
++ done:
++	printk(KERN_NOTICE "bootloader size flag: %d\n", cfe_size_flag);
++	return cfe_size_flag;
++
++}
++
++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;
++
++	for (off = (256*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) {
++			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)
++{
++
++	int cfe_size_flag;
++
++	cfe_size_flag = find_cfe_size(mtd,size); 
++
++	/* if cfe_size_flag=0, cfe size is 256 kb, else 384 kb */
++
++	/* boot loader */
++	bcm947xx_parts[0].offset = 0;
++	if (cfe_size_flag == 0) {
++		bcm947xx_parts[0].size	 = 1024*256;
++	} else {
++		/* netgear wgt634u has 384 kb bootloader */
++		bcm947xx_parts[0].size   = 1024*384;
++	}
++
++	/* nvram */
++	if (cfe_size_flag == 0) {
++		bcm947xx_parts[3].offset = size - mtd->erasesize;
++		bcm947xx_parts[3].size   = mtd->erasesize;
++	} else {
++		/* nvram (old 128kb config partition on netgear wgt634u) */
++		bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
++		bcm947xx_parts[3].size   = 1024*128;
++	}
++
++	/* linux (kernel and rootfs) */
++	if (cfe_size_flag == 0) {
++		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 sector */
++		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;
++		if (cfe_size_flag == 0) {
++			bcm947xx_parts[2].size = bcm947xx_parts[3].offset - 
++				bcm947xx_parts[2].offset;
++		} else {
++			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_flag == 0) {
++			bcm947xx_parts[4].offset = bcm947xx_parts[2].offset + 
++				bcm947xx_parts[2].size;
++			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;
++}
++
++EXPORT_SYMBOL(init_mtd_partitions);
++#endif
++
++int __init init_bcm947xx_map(void)
++{
++	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");
++		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", bcm947xx_mtd->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.map_priv_1)
++		iounmap((void *) bcm947xx_map.map_priv_1);
++	bcm947xx_map.map_priv_1 = 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 -Nur linux-2.6.12.5/drivers/mtd/maps/Kconfig linux-2.6.12.5-flash/drivers/mtd/maps/Kconfig
+--- linux-2.6.12.5/drivers/mtd/maps/Kconfig	2005-08-15 02:20:18.000000000 +0200
++++ linux-2.6.12.5-flash/drivers/mtd/maps/Kconfig	2005-09-16 22:27:36.000000000 +0200
+@@ -357,6 +357,12 @@
+ 	  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 && PPC32 && 40x && BEECH
+diff -Nur linux-2.6.12.5/drivers/mtd/maps/Makefile linux-2.6.12.5-flash/drivers/mtd/maps/Makefile
+--- linux-2.6.12.5/drivers/mtd/maps/Makefile	2005-08-15 02:20:18.000000000 +0200
++++ linux-2.6.12.5-flash/drivers/mtd/maps/Makefile	2005-09-16 22:27:01.000000000 +0200
+@@ -31,6 +31,7 @@
+ 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