diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c --- linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100 +++ linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c 2005-12-19 00:33:31.276241000 +0100 @@ -0,0 +1,316 @@ +/* + * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) + * Copyright (C) 2005 Waldemar Brodkorb + * + * 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 +#include +#include +#include +#include +#include +#include +#ifdef CONFIG_MTD_PARTITIONS +#include +#endif +#include + +#include + +#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; + + /* 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 + +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", 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 -Nur linux-2.6.15-rc5/drivers/mtd/maps/Kconfig linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig --- linux-2.6.15-rc5/drivers/mtd/maps/Kconfig 2005-12-04 06:10:42.000000000 +0100 +++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig 2005-12-18 19:36:11.555087000 +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 -Nur linux-2.6.15-rc5/drivers/mtd/maps/Makefile linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile --- linux-2.6.15-rc5/drivers/mtd/maps/Makefile 2005-12-04 06:10:42.000000000 +0100 +++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile 2005-12-18 19:36:11.555087000 +0100 @@ -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