diff options
Diffstat (limited to 'target/linux/brcm47xx/files-2.6.25/drivers/mtd')
| -rw-r--r-- | target/linux/brcm47xx/files-2.6.25/drivers/mtd/maps/bcm47xx-flash.c | 439 |
1 files changed, 0 insertions, 439 deletions
diff --git a/target/linux/brcm47xx/files-2.6.25/drivers/mtd/maps/bcm47xx-flash.c b/target/linux/brcm47xx/files-2.6.25/drivers/mtd/maps/bcm47xx-flash.c deleted file mode 100644 index 118d4c4fc1..0000000000 --- a/target/linux/brcm47xx/files-2.6.25/drivers/mtd/maps/bcm47xx-flash.c +++ /dev/null @@ -1,439 +0,0 @@ -/* - * 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/sched.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/crc32.h> -#ifdef CONFIG_SSB -#include <linux/ssb/ssb.h> -#endif -#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 - -#ifdef CONFIG_SSB -extern struct ssb_bus ssb_bcm47xx; -#endif -static struct mtd_info *bcm47xx_mtd; - -static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) -{ - if (len==1) { - memcpy_fromio(to, map->virt + from, len); - } else { - int i; - u16 *dest = (u16 *) to; - u16 *src = (u16 *) (map->virt + from); - for (i = 0; i < (len / 2); i++) { - dest[i] = src[i]; - } - if (len & 1) - *((u8 *)dest+len-1) = src[i] & 0xff; - } -} - -static struct map_info bcm47xx_map = { - name: "Physically mapped flash", - size: WINDOW_SIZE, - bankwidth: BUSWIDTH, - phys: WINDOW_ADDR, -}; - -#ifdef CONFIG_MTD_PARTITIONS - -static struct mtd_partition bcm47xx_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: 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; - - /* Move the fs outside of the trx */ - part->size = 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 */ - bcm47xx_parts[0].offset = 0; - bcm47xx_parts[0].size = cfe_size; - - /* nvram */ - if (cfe_size != 384 * 1024) { - bcm47xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize); - bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); - } else { - /* nvram (old 128kb config partition on netgear wgt634u) */ - bcm47xx_parts[3].offset = bcm47xx_parts[0].size; - bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); - } - - /* linux (kernel and rootfs) */ - if (cfe_size != 384 * 1024) { - bcm47xx_parts[1].offset = bcm47xx_parts[0].size; - bcm47xx_parts[1].size = bcm47xx_parts[3].offset - - bcm47xx_parts[1].offset; - } else { - /* do not count the elf loader, which is on one block */ - bcm47xx_parts[1].offset = bcm47xx_parts[0].size + - bcm47xx_parts[3].size + mtd->erasesize; - bcm47xx_parts[1].size = size - - bcm47xx_parts[0].size - - (2*bcm47xx_parts[3].size) - - mtd->erasesize; - } - - /* find and size rootfs */ - find_root(mtd,size,&bcm47xx_parts[2]); - bcm47xx_parts[2].size = size - bcm47xx_parts[2].offset - bcm47xx_parts[3].size; - - return bcm47xx_parts; -} -#endif - -int __init init_bcm47xx_map(void) -{ -#ifdef CONFIG_SSB - struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore; -#endif - size_t size; - int ret = 0; -#ifdef CONFIG_MTD_PARTITIONS - struct mtd_partition *parts; - int i; -#endif - -#ifdef CONFIG_SSB - u32 window = mcore->flash_window; - u32 window_size = mcore->flash_window_size; - - printk("flash init: 0x%08x 0x%08x\n", window, window_size); - bcm47xx_map.phys = window; - bcm47xx_map.size = window_size; - bcm47xx_map.virt = ioremap_nocache(window, window_size); -#else - printk("flash init: 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE); - bcm47xx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE); -#endif - - if (!bcm47xx_map.virt) { - printk("Failed to ioremap\n"); - return -EIO; - } - - simple_map_init(&bcm47xx_map); - - if (!(bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map))) { - printk("Failed to do_map_probe\n"); - iounmap((void *)bcm47xx_map.virt); - return -ENXIO; - } - - /* override copy_from routine */ - bcm47xx_map.copy_from = bcm47xx_map_copy_from; - - bcm47xx_mtd->owner = THIS_MODULE; - - size = bcm47xx_mtd->size; - - printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR); - -#ifdef CONFIG_MTD_PARTITIONS - parts = init_mtd_partitions(bcm47xx_mtd, size); - for (i = 0; parts[i].name; i++); - ret = add_mtd_partitions(bcm47xx_mtd, parts, i); - if (ret) { - printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); - goto fail; - } -#endif - return 0; - - fail: - if (bcm47xx_mtd) - map_destroy(bcm47xx_mtd); - if (bcm47xx_map.virt) - iounmap((void *)bcm47xx_map.virt); - bcm47xx_map.virt = 0; - return ret; -} - -void __exit cleanup_bcm47xx_map(void) -{ -#ifdef CONFIG_MTD_PARTITIONS - del_mtd_partitions(bcm47xx_mtd); -#endif - map_destroy(bcm47xx_mtd); - iounmap((void *)bcm47xx_map.virt); -} - -module_init(init_bcm47xx_map); -module_exit(cleanup_bcm47xx_map); |