parent
1cea8d99bf
commit
a15a86ce3f
@ -1,497 +0,0 @@ |
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/*
|
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* Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> |
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* Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org> |
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* Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) |
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* |
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* original functions for finding root filesystem from Mike Baker |
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* |
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* This program is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License as published by the |
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* Free Software Foundation; either version 2 of the License, or (at your |
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* option) any later version. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN |
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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* Copyright 2001-2003, Broadcom Corporation |
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* All Rights Reserved. |
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* |
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY |
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM |
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS |
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. |
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* |
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* Flash mapping for ADM5120 boards |
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*/ |
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|
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/types.h> |
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#include <linux/kernel.h> |
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#include <linux/wait.h> |
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#include <linux/mtd/mtd.h> |
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#include <linux/mtd/map.h> |
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#include <linux/sched.h> |
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#ifdef CONFIG_MTD_PARTITIONS |
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#include <linux/mtd/partitions.h> |
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#endif |
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#include <linux/squashfs_fs.h> |
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#include <linux/jffs2.h> |
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#include <linux/crc32.h> |
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#include <asm/io.h> |
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#include <asm/mach-adm5120/myloader.h> |
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#include <asm/mach-adm5120/adm5120_info.h> |
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extern int parse_myloader_partitions(struct mtd_info *master, |
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struct mtd_partition **pparts, |
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unsigned long origin); |
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/* Macros for switching flash bank
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ADM5120 only support 2MB flash address space |
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so GPIO5 is used as A20 |
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*/ |
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#define GPIO_IO ((volatile unsigned long *)0xb20000b8) |
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#define FLASH_A20_GPIO 5 |
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#define FLASH_BOUNDARY 0x200000 |
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#define TRX_MAGIC 0x30524448 /* "HDR0" */ |
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#define TRX_VERSION 1 |
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#define TRX_MAX_LEN 0x3A0000 |
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#define TRX_NO_HEADER 1 /* Do not write TRX header */ |
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#define TRX_GZ_FILES 0x2 /* Contains up to TRX_MAX_OFFSET individual gzip files */ |
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#define TRX_MAX_OFFSET 3 |
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struct trx_header { |
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u32 magic; /* "HDR0" */ |
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u32 len; /* Length of file including header */ |
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u32 crc32; /* 32-bit CRC from flag_version to end of file */ |
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u32 flag_version; /* 0:15 flags, 16:31 version */ |
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u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ |
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}; |
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#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) |
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#define NVRAM_SPACE 0x8000 |
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#define WINDOW_ADDR 0x1fc00000 |
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#define WINDOW_SIZE 0x400000 |
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#define BUSWIDTH 2 |
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static struct mtd_info *adm5120_mtd; |
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static struct map_info adm5120_map = { |
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name: "adm5120 physically mapped flash", |
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size: WINDOW_SIZE, |
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bankwidth: BUSWIDTH, |
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phys: WINDOW_ADDR, |
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}; |
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#ifdef CONFIG_MTD_PARTITIONS |
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static struct mtd_partition adm5120_cfe_parts[] = { |
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{ name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, }, |
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{ name: "linux", offset: 0, size: 0, }, |
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{ name: "rootfs", offset: 0, size: 0, }, |
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{ name: "nvram", offset: 0, size: 0, }, |
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{ name: NULL, }, |
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}; |
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static void flash_switch_bank(unsigned long addr) |
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{ |
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unsigned long val; |
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/* Set GPIO as output */ |
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val = *GPIO_IO | (1 << (FLASH_A20_GPIO+16)); |
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if ( addr & FLASH_BOUNDARY ) { |
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val |= 1 << (FLASH_A20_GPIO + 24); |
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} else { |
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val &= ~(1 << (FLASH_A20_GPIO + 24)); |
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} |
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*GPIO_IO = val; |
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} |
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static map_word adm5120_map_read(struct map_info *map, unsigned long ofs) |
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{ |
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flash_switch_bank(ofs); |
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return inline_map_read(map, ofs); |
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} |
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static void adm5120_map_write(struct map_info *map, const map_word datum, unsigned long ofs) |
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{ |
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flash_switch_bank(ofs); |
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inline_map_write(map, datum, ofs); |
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} |
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static void adm5120_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) |
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{ |
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ssize_t tmp; |
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if (from < FLASH_BOUNDARY) { |
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tmp = (len < (FLASH_BOUNDARY - from)) ? len : (FLASH_BOUNDARY - from); |
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flash_switch_bank(0); |
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inline_map_copy_from(map, to, from, tmp); |
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to = (void *)((char *)to + tmp); |
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from += tmp; |
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len -= tmp; |
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} |
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if (len > 0) { |
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flash_switch_bank(FLASH_BOUNDARY); |
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inline_map_copy_from(map, to, from, len); |
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} |
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} |
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static int __init |
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find_cfe_size(struct mtd_info *mtd, size_t size) |
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{ |
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struct trx_header *trx; |
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unsigned char buf[512]; |
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int off; |
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size_t len; |
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int blocksize; |
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trx = (struct trx_header *) buf; |
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blocksize = mtd->erasesize; |
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if (blocksize < 0x10000) |
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blocksize = 0x10000; |
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for (off = (128*1024); off < size; off += blocksize) { |
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memset(buf, 0xe5, sizeof(buf)); |
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/*
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* Read into buffer |
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*/ |
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if (mtd->read(mtd, off, sizeof(buf), &len, buf) || |
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len != sizeof(buf)) |
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continue; |
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/* found a TRX header */ |
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if (le32_to_cpu(trx->magic) == TRX_MAGIC) { |
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goto found; |
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} |
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} |
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printk(KERN_NOTICE |
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"%s: Couldn't find bootloader size\n", |
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mtd->name); |
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return -1; |
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found: |
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printk(KERN_NOTICE "bootloader size: %d\n", off); |
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return off; |
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} |
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/*
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* Copied from mtdblock.c |
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* |
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* Cache stuff... |
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* |
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* Since typical flash erasable sectors are much larger than what Linux's |
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* buffer cache can handle, we must implement read-modify-write on flash |
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* sectors for each block write requests. To avoid over-erasing flash sectors |
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* and to speed things up, we locally cache a whole flash sector while it is |
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* being written to until a different sector is required. |
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*/ |
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static void erase_callback(struct erase_info *done) |
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{ |
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wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv; |
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wake_up(wait_q); |
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} |
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static int erase_write (struct mtd_info *mtd, unsigned long pos, |
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int len, const char *buf) |
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{ |
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struct erase_info erase; |
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DECLARE_WAITQUEUE(wait, current); |
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wait_queue_head_t wait_q; |
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size_t retlen; |
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int ret; |
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/*
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* First, let's erase the flash block. |
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*/ |
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init_waitqueue_head(&wait_q); |
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erase.mtd = mtd; |
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erase.callback = erase_callback; |
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erase.addr = pos; |
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erase.len = len; |
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erase.priv = (u_long)&wait_q; |
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set_current_state(TASK_INTERRUPTIBLE); |
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add_wait_queue(&wait_q, &wait); |
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ret = mtd->erase(mtd, &erase); |
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if (ret) { |
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set_current_state(TASK_RUNNING); |
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remove_wait_queue(&wait_q, &wait); |
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printk (KERN_WARNING "erase of region [0x%lx, 0x%x] " |
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"on \"%s\" failed\n", |
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pos, len, mtd->name); |
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return ret; |
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} |
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schedule(); /* Wait for erase to finish. */ |
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remove_wait_queue(&wait_q, &wait); |
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/*
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* Next, writhe data to flash. |
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*/ |
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ret = mtd->write (mtd, pos, len, &retlen, buf); |
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if (ret) |
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return ret; |
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if (retlen != len) |
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return -EIO; |
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return 0; |
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} |
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static int __init |
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find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part) |
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{ |
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struct trx_header trx, *trx2; |
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unsigned char buf[512], *block; |
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int off, blocksize; |
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u32 i, crc = ~0; |
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size_t len; |
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struct squashfs_super_block *sb = (struct squashfs_super_block *) buf; |
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blocksize = mtd->erasesize; |
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if (blocksize < 0x10000) |
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blocksize = 0x10000; |
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for (off = (128*1024); off < size; off += blocksize) { |
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memset(&trx, 0xe5, sizeof(trx)); |
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/*
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* Read into buffer |
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*/ |
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if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) || |
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len != sizeof(trx)) |
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continue; |
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/* found a TRX header */ |
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if (le32_to_cpu(trx.magic) == TRX_MAGIC) { |
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part->offset = le32_to_cpu(trx.offsets[2]) ? : |
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le32_to_cpu(trx.offsets[1]); |
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part->size = le32_to_cpu(trx.len); |
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part->size -= part->offset; |
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part->offset += off; |
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goto found; |
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} |
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} |
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printk(KERN_NOTICE |
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"%s: Couldn't find root filesystem\n", |
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mtd->name); |
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return -1; |
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found: |
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if (part->size == 0) |
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return 0; |
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if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf)) |
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return 0; |
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/* Move the fs outside of the trx */ |
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part->size = 0; |
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if (trx.len != part->offset + part->size - off) { |
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/* Update the trx offsets and length */ |
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trx.len = part->offset + part->size - off; |
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/* Update the trx crc32 */ |
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for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) { |
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if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf)) |
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return 0; |
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crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i)); |
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} |
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trx.crc32 = crc; |
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/* read first eraseblock from the trx */ |
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block = kmalloc(mtd->erasesize, GFP_KERNEL); |
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trx2 = (struct trx_header *) block; |
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if (mtd->read(mtd, off, mtd->erasesize, &len, block) || len != mtd->erasesize) { |
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printk("Error accessing the first trx eraseblock\n"); |
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return 0; |
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} |
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printk("Updating TRX offsets and length:\n"); |
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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); |
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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); |
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/* Write updated trx header to the flash */ |
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memcpy(block, &trx, sizeof(trx)); |
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if (mtd->unlock) |
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mtd->unlock(mtd, off, mtd->erasesize); |
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erase_write(mtd, off, mtd->erasesize, block); |
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if (mtd->sync) |
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mtd->sync(mtd); |
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kfree(block); |
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printk("Done\n"); |
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} |
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return part->size; |
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} |
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struct mtd_partition * __init |
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init_mtd_partitions(struct mtd_info *mtd, size_t size) |
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{ |
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int cfe_size; |
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if ((cfe_size = find_cfe_size(mtd,size)) < 0) |
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return NULL; |
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/* boot loader */ |
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adm5120_cfe_parts[0].offset = 0; |
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adm5120_cfe_parts[0].size = cfe_size; |
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/* nvram */ |
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if (cfe_size != 384 * 1024) { |
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adm5120_cfe_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize); |
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adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); |
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} else { |
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/* nvram (old 128kb config partition on netgear wgt634u) */ |
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adm5120_cfe_parts[3].offset = adm5120_cfe_parts[0].size; |
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adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); |
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} |
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/* linux (kernel and rootfs) */ |
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if (cfe_size != 384 * 1024) { |
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adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size; |
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adm5120_cfe_parts[1].size = adm5120_cfe_parts[3].offset - |
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adm5120_cfe_parts[1].offset; |
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} else { |
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/* do not count the elf loader, which is on one block */ |
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adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size + |
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adm5120_cfe_parts[3].size + mtd->erasesize; |
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adm5120_cfe_parts[1].size = size - |
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adm5120_cfe_parts[0].size - |
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(2*adm5120_cfe_parts[3].size) - |
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mtd->erasesize; |
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} |
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|
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/* find and size rootfs */ |
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find_root(mtd,size,&adm5120_cfe_parts[2]); |
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adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset - adm5120_cfe_parts[3].size; |
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|
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return adm5120_cfe_parts; |
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} |
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#endif |
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|
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int __init init_adm5120_map(void) |
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{ |
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size_t size; |
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int ret = 0; |
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#if defined (CONFIG_MTD_PARTITIONS) || (CONFIG_MTD_MYLOADER_PARTS) |
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struct mtd_partition *parts; |
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int i, parsed_nr_parts = 0; |
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#endif |
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|
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if (adm5120_nand_boot) |
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return -ENODEV; |
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|
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printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, adm5120_board.flash0_size); |
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adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, adm5120_board.flash0_size); |
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|
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if (!adm5120_map.virt) { |
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printk("Failed to ioremap\n"); |
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return -EIO; |
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} |
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simple_map_init(&adm5120_map); |
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adm5120_map.read = adm5120_map_read; |
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adm5120_map.write = adm5120_map_write; |
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adm5120_map.copy_from = adm5120_map_copy_from; |
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|
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if (!(adm5120_mtd = do_map_probe("cfi_probe", &adm5120_map))) { |
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printk("Failed to do_map_probe\n"); |
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iounmap((void *)adm5120_map.virt); |
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return -ENXIO; |
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} |
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|
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adm5120_mtd->owner = THIS_MODULE; |
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|
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size = adm5120_mtd->size; |
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|
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printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR); |
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|
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#ifdef CONFIG_MTD_PARTITIONS |
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|
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if (adm5120_boot_loader == BOOT_LOADER_CFE || adm5120_boot_loader == BOOT_LOADER_UNKNOWN) |
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{ |
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printk(KERN_NOTICE "adm5120 : using CFE flash mapping\n"); |
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parts = init_mtd_partitions(adm5120_mtd, size); |
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|
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for (i = 0; parts[i].name; i++); |
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ret = add_mtd_partitions(adm5120_mtd, parts, i); |
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|
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if (ret) { |
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printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); |
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goto fail; |
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} |
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} |
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#endif |
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#ifdef CONFIG_MTD_MYLOADER_PARTS |
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if (adm5120_boot_loader == BOOT_LOADER_MYLOADER) |
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{ |
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printk(KERN_NOTICE "adm5120 : using MyLoader flash mapping\n"); |
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char *part_type; |
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|
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if (parsed_nr_parts == 0) { |
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ret = parse_myloader_partitions(adm5120_mtd, &parts, 0); |
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|
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if (ret > 0) { |
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part_type ="MyLoader"; |
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parsed_nr_parts = ret; |
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} |
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} |
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ret = add_mtd_partitions(adm5120_mtd, parts, parsed_nr_parts); |
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|
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if (ret) { |
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printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); |
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goto fail; |
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} |
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} |
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#endif |
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return 0; |
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|
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fail: |
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if (adm5120_mtd) |
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map_destroy(adm5120_mtd); |
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if (adm5120_map.virt) |
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iounmap((void *)adm5120_map.virt); |
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adm5120_map.virt = 0; |
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return ret; |
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} |
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|
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void __exit cleanup_adm5120_map(void) |
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{ |
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#ifdef CONFIG_MTD_PARTITIONS |
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del_mtd_partitions(adm5120_mtd); |
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#endif |
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map_destroy(adm5120_mtd); |
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iounmap((void *)adm5120_map.virt); |
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} |
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|
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module_init(init_adm5120_map); |
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module_exit(cleanup_adm5120_map); |
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