diff options
| -rw-r--r-- | target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c | 497 |
1 files changed, 0 insertions, 497 deletions
diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c b/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c deleted file mode 100644 index ba36298b3e..0000000000 --- a/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c +++ /dev/null @@ -1,497 +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 ADM5120 boards - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/wait.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/map.h> -#include <linux/sched.h> -#ifdef CONFIG_MTD_PARTITIONS -#include <linux/mtd/partitions.h> -#endif -#include <linux/squashfs_fs.h> -#include <linux/jffs2.h> -#include <linux/crc32.h> -#include <asm/io.h> -#include <asm/mach-adm5120/myloader.h> -#include <asm/mach-adm5120/adm5120_info.h> - -extern int parse_myloader_partitions(struct mtd_info *master, - struct mtd_partition **pparts, - unsigned long origin); - -/* Macros for switching flash bank - ADM5120 only support 2MB flash address space - so GPIO5 is used as A20 - */ -#define GPIO_IO ((volatile unsigned long *)0xb20000b8) -#define FLASH_A20_GPIO 5 -#define FLASH_BOUNDARY 0x200000 - - -#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 - -static struct mtd_info *adm5120_mtd; - -static struct map_info adm5120_map = { - name: "adm5120 physically mapped flash", - size: WINDOW_SIZE, - bankwidth: BUSWIDTH, - phys: WINDOW_ADDR, -}; - -#ifdef CONFIG_MTD_PARTITIONS - -static struct mtd_partition adm5120_cfe_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 void flash_switch_bank(unsigned long addr) -{ - unsigned long val; - - /* Set GPIO as output */ - val = *GPIO_IO | (1 << (FLASH_A20_GPIO+16)); - if ( addr & FLASH_BOUNDARY ) { - val |= 1 << (FLASH_A20_GPIO + 24); - } else { - val &= ~(1 << (FLASH_A20_GPIO + 24)); - } - *GPIO_IO = val; -} - -static map_word adm5120_map_read(struct map_info *map, unsigned long ofs) -{ - flash_switch_bank(ofs); - return inline_map_read(map, ofs); -} - -static void adm5120_map_write(struct map_info *map, const map_word datum, unsigned long ofs) -{ - flash_switch_bank(ofs); - inline_map_write(map, datum, ofs); -} - -static void adm5120_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) -{ - ssize_t tmp; - - if (from < FLASH_BOUNDARY) { - tmp = (len < (FLASH_BOUNDARY - from)) ? len : (FLASH_BOUNDARY - from); - flash_switch_bank(0); - inline_map_copy_from(map, to, from, tmp); - to = (void *)((char *)to + tmp); - from += tmp; - len -= tmp; - } - if (len > 0) { - flash_switch_bank(FLASH_BOUNDARY); - inline_map_copy_from(map, to, from, len); - } - -} - -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 */ - adm5120_cfe_parts[0].offset = 0; - adm5120_cfe_parts[0].size = cfe_size; - - /* nvram */ - if (cfe_size != 384 * 1024) { - adm5120_cfe_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize); - adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); - } else { - /* nvram (old 128kb config partition on netgear wgt634u) */ - adm5120_cfe_parts[3].offset = adm5120_cfe_parts[0].size; - adm5120_cfe_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); - } - - /* linux (kernel and rootfs) */ - if (cfe_size != 384 * 1024) { - adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size; - adm5120_cfe_parts[1].size = adm5120_cfe_parts[3].offset - - adm5120_cfe_parts[1].offset; - } else { - /* do not count the elf loader, which is on one block */ - adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size + - adm5120_cfe_parts[3].size + mtd->erasesize; - adm5120_cfe_parts[1].size = size - - adm5120_cfe_parts[0].size - - (2*adm5120_cfe_parts[3].size) - - mtd->erasesize; - } - - /* find and size rootfs */ - find_root(mtd,size,&adm5120_cfe_parts[2]); - adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset - adm5120_cfe_parts[3].size; - - return adm5120_cfe_parts; -} -#endif - -int __init init_adm5120_map(void) -{ - size_t size; - int ret = 0; -#if defined (CONFIG_MTD_PARTITIONS) || (CONFIG_MTD_MYLOADER_PARTS) - struct mtd_partition *parts; - int i, parsed_nr_parts = 0; -#endif - - if (adm5120_nand_boot) - return -ENODEV; - - printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, adm5120_board.flash0_size); - adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, adm5120_board.flash0_size); - - if (!adm5120_map.virt) { - printk("Failed to ioremap\n"); - return -EIO; - } - simple_map_init(&adm5120_map); - adm5120_map.read = adm5120_map_read; - adm5120_map.write = adm5120_map_write; - adm5120_map.copy_from = adm5120_map_copy_from; - - if (!(adm5120_mtd = do_map_probe("cfi_probe", &adm5120_map))) { - printk("Failed to do_map_probe\n"); - iounmap((void *)adm5120_map.virt); - return -ENXIO; - } - - adm5120_mtd->owner = THIS_MODULE; - - size = adm5120_mtd->size; - - printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR); - -#ifdef CONFIG_MTD_PARTITIONS - - if (adm5120_boot_loader == BOOT_LOADER_CFE || adm5120_boot_loader == BOOT_LOADER_UNKNOWN) - { - printk(KERN_NOTICE "adm5120 : using CFE flash mapping\n"); - parts = init_mtd_partitions(adm5120_mtd, size); - - for (i = 0; parts[i].name; i++); - ret = add_mtd_partitions(adm5120_mtd, parts, i); - - if (ret) { - printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); - goto fail; - } - } -#endif -#ifdef CONFIG_MTD_MYLOADER_PARTS - if (adm5120_boot_loader == BOOT_LOADER_MYLOADER) - { - printk(KERN_NOTICE "adm5120 : using MyLoader flash mapping\n"); - char *part_type; - - if (parsed_nr_parts == 0) { - ret = parse_myloader_partitions(adm5120_mtd, &parts, 0); - - if (ret > 0) { - part_type ="MyLoader"; - parsed_nr_parts = ret; - } - } - ret = add_mtd_partitions(adm5120_mtd, parts, parsed_nr_parts); - - if (ret) { - printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); - goto fail; - } - } -#endif - return 0; - - fail: - if (adm5120_mtd) - map_destroy(adm5120_mtd); - if (adm5120_map.virt) - iounmap((void *)adm5120_map.virt); - adm5120_map.virt = 0; - return ret; -} - -void __exit cleanup_adm5120_map(void) -{ -#ifdef CONFIG_MTD_PARTITIONS - del_mtd_partitions(adm5120_mtd); -#endif - map_destroy(adm5120_mtd); - iounmap((void *)adm5120_map.virt); -} - -module_init(init_adm5120_map); -module_exit(cleanup_adm5120_map); |