+diff -Nur linux-2.4.32/drivers/mtd/maps/bcm947xx-flash.c linux-2.4.32-flash/drivers/mtd/maps/bcm947xx-flash.c
+--- linux-2.4.32/drivers/mtd/maps/bcm947xx-flash.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.4.32-flash/drivers/mtd/maps/bcm947xx-flash.c 2005-12-19 01:29:52.464670750 +0100
+@@ -0,0 +1,366 @@
++/*
++ * 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 2004, 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/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <asm/io.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/map.h>
++#ifdef CONFIG_MTD_PARTITIONS
++#include <linux/mtd/partitions.h>
++#endif
++#include <linux/config.h>
++
++#include <trxhdr.h>
++
++#define WINDOW_ADDR 0x1c000000
++#define WINDOW_SIZE (0x400000*2)
++#define BUSWIDTH 2
++
++static struct mtd_info *bcm947xx_mtd;
++
++__u8 bcm947xx_map_read8(struct map_info *map, unsigned long ofs)
++{
++ if (map->map_priv_2 == 1)
++ return __raw_readb(map->map_priv_1 + ofs);
++
++ u16 val = __raw_readw(map->map_priv_1 + (ofs & ~1));
++ if (ofs & 1)
++ return ((val >> 8) & 0xff);
++ else
++ return (val & 0xff);
++}
++
++__u16 bcm947xx_map_read16(struct map_info *map, unsigned long ofs)
++{
++ return __raw_readw(map->map_priv_1 + ofs);
++}
++
++__u32 bcm947xx_map_read32(struct map_info *map, unsigned long ofs)
++{
++ return __raw_readl(map->map_priv_1 + ofs);
++}
++
++void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
++{
++ if (len==1) {
++ memcpy_fromio(to, map->map_priv_1 + from, len);
++ } else {
++ int i;
++ u16 *dest = (u16 *) to;
++ u16 *src = (u16 *) (map->map_priv_1 + from);
++ for (i = 0; i < (len / 2); i++) {
++ dest[i] = src[i];
++ }
++ if (len & 1)
++ *((u8 *)dest+len-1) = src[i] & 0xff;
++ }
++}
++
++void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
++{
++ __raw_writeb(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void bcm947xx_map_write16(struct map_info *map, __u16 d, unsigned long adr)
++{
++ __raw_writew(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void bcm947xx_map_write32(struct map_info *map, __u32 d, unsigned long adr)
++{
++ __raw_writel(d, map->map_priv_1 + adr);
++ mb();
++}
++
++void bcm947xx_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
++{
++ memcpy_toio(map->map_priv_1 + to, from, len);
++}
++
++struct map_info bcm947xx_map = {
++ name: "Physically mapped flash",
++ size: WINDOW_SIZE,
++ buswidth: BUSWIDTH,
++ read8: bcm947xx_map_read8,
++ read16: bcm947xx_map_read16,
++ read32: bcm947xx_map_read32,
++ copy_from: bcm947xx_map_copy_from,
++ write8: bcm947xx_map_write8,
++ write16: bcm947xx_map_write16,
++ write32: bcm947xx_map_write32,
++ copy_to: bcm947xx_map_copy_to
++};
++
++#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;
++
++ /* if cfe_size_flag=0, cfe size is 256 kb, else 384 kb */
++ cfe_size_flag = find_cfe_size(mtd,size);
++
++ /* 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;
++ } else {
++ /* nvram (old 128kb config partition on netgear wgt634u) */
++ bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
++ }
++ bcm947xx_parts[3].size = mtd->erasesize;
++
++ /* 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 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_flag == 0) {
++ 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
++
++
++mod_init_t init_bcm947xx_map(void)
++{
++ size_t size;
++ int ret = 0;
++#ifdef CONFIG_MTD_PARTITIONS
++ struct mtd_partition *parts;
++ int i;
++#endif
++
++ bcm947xx_map.map_priv_1 = (unsigned long) ioremap(WINDOW_ADDR, WINDOW_SIZE);
++
++ if (!bcm947xx_map.map_priv_1) {
++ printk(KERN_ERR "Failed to ioremap\n");
++ return -EIO;
++ }
++
++ if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
++ printk(KERN_ERR "pflash: cfi_probe failed\n");
++ iounmap((void *)bcm947xx_map.map_priv_1);
++ return -ENXIO;
++ }
++
++ bcm947xx_mtd->module = 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.map_priv_1)
++ iounmap((void *) bcm947xx_map.map_priv_1);
++ bcm947xx_map.map_priv_1 = 0;
++ return ret;
++}
++
++mod_exit_t cleanup_bcm947xx_map(void)
++{
++#ifdef CONFIG_MTD_PARTITIONS
++ del_mtd_partitions(bcm947xx_mtd);
++#endif
++ map_destroy(bcm947xx_mtd);
++ iounmap((void *) bcm947xx_map.map_priv_1);
++ bcm947xx_map.map_priv_1 = 0;
++}
++
++module_init(init_bcm947xx_map);
++module_exit(cleanup_bcm947xx_map);
+diff -Nur linux-2.4.32/drivers/mtd/maps/Config.in linux-2.4.32-flash/drivers/mtd/maps/Config.in
+--- linux-2.4.32/drivers/mtd/maps/Config.in 2003-06-13 16:51:34.000000000 +0200
++++ linux-2.4.32-flash/drivers/mtd/maps/Config.in 2005-12-18 15:53:52.003277250 +0100
+@@ -48,6 +48,7 @@
+ fi
+
+ if [ "$CONFIG_MIPS" = "y" ]; then
++ dep_tristate ' CFI Flash device mapped on Broadcom BCM947XX boards' CONFIG_MTD_BCM947XX $CONFIG_MTD_CFI
+ dep_tristate ' Pb1000 MTD support' CONFIG_MTD_PB1000 $CONFIG_MIPS_PB1000
+ dep_tristate ' Pb1500 MTD support' CONFIG_MTD_PB1500 $CONFIG_MIPS_PB1500
+ dep_tristate ' Pb1100 MTD support' CONFIG_MTD_PB1100 $CONFIG_MIPS_PB1100
+diff -Nur linux-2.4.32/drivers/mtd/maps/Makefile linux-2.4.32-flash/drivers/mtd/maps/Makefile
+--- linux-2.4.32/drivers/mtd/maps/Makefile 2003-06-13 16:51:34.000000000 +0200
++++ linux-2.4.32-flash/drivers/mtd/maps/Makefile 2005-12-18 15:54:39.022215750 +0100
+@@ -3,6 +3,8 @@
+ #
+ # $Id: Makefile,v 1.37 2003/01/24 14:26:38 dwmw2 Exp $
+
++EXTRA_CFLAGS := -I$(TOPDIR)/arch/mips/bcm947xx/include
++
+ BELOW25 := $(shell echo $(PATCHLEVEL) | sed s/[1234]/y/)
+
+ ifeq ($(BELOW25),y)
+@@ -10,6 +12,7 @@
+ endif
+
+ # Chip mappings
++obj-$(CONFIG_MTD_BCM947XX) += bcm947xx-flash.o
+ obj-$(CONFIG_MTD_CDB89712) += cdb89712.o
+ obj-$(CONFIG_MTD_ARM_INTEGRATOR)+= integrator-flash.o
+ obj-$(CONFIG_MTD_CFI_FLAGADM) += cfi_flagadm.o
projects / openwrt.git / commitdiff