X-Git-Url: http://git.rohieb.name/openwrt.git/blobdiff_plain/14f5c350584f1b0f282cfe7724965fb44494b3eb..3e0bf90d9e58d95d4a3604505db492d57b2d15a9:/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c 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 index a9e97cb31..df506d7fa 100644 --- 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 @@ -1,55 +1,535 @@ /* - * Flash device on the ADM5120 board + * Copyright (C) 2006 Felix Fietkau + * Copyright (C) 2005 Waldemar Brodkorb + * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) * - * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 + * 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 version - * 2 as published by the Free Software Foundation. + * 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 +#include #include +#include #include +#include #include #include +#ifdef CONFIG_MTD_PARTITIONS +#include +#endif +#include +#include +#include +#include +#include +#include + +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 FLASH_PHYS_ADDR 0x1FC00000 -#define FLASH_SIZE 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_mtd_map = { - .name = "ADM5120", - .size = FLASH_SIZE, - .bankwidth = 2, - .phys = FLASH_PHYS_ADDR, +static struct map_info adm5120_map = { + name: "adm5120 physically mapped flash", + size: WINDOW_SIZE, + bankwidth: BUSWIDTH, + phys: WINDOW_ADDR, }; -static int __init adm5120_mtd_init(void) +#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: "OpenWrt", 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) { - printk(KERN_INFO "ADM5120 board flash (0x%x at 0x%x)\n", FLASH_SIZE, - FLASH_PHYS_ADDR); - adm5120_mtd_map.virt = ioremap_nocache(FLASH_PHYS_ADDR, FLASH_SIZE); - simple_map_init(&adm5120_mtd_map); - adm5120_mtd = do_map_probe("cfi_probe", &adm5120_mtd_map); - if (adm5120_mtd) { - adm5120_mtd->owner = THIS_MODULE; - add_mtd_device(adm5120_mtd); + 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; + + if (*((__u32 *) buf) == SQUASHFS_MAGIC) { + printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used); + + /* Update the squashfs partition size based on the superblock info */ + part->size = sb->bytes_used; + len = part->offset + part->size; + len += (mtd->erasesize - 1); + len &= ~(mtd->erasesize - 1); + part->size = len - part->offset; + } else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) { + printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name); + + /* Move the squashfs outside of the trx */ + part->size = 0; + } else { + printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name); return 0; } - return -ENXIO; + + 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; } -static void __exit adm5120_mtd_exit(void) +struct mtd_partition * __init +init_mtd_partitions(struct mtd_info *mtd, size_t size) { - del_mtd_device(adm5120_mtd); - map_destroy(adm5120_mtd); + 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 */ + if (find_root(mtd,size,&adm5120_cfe_parts[2])==0) { + /* entirely jffs2 */ + adm5120_cfe_parts[4].name = NULL; + adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset - + adm5120_cfe_parts[3].size; + } else { + /* legacy setup */ + /* calculate leftover flash, and assign it to the jffs2 partition */ + if (cfe_size != 384 * 1024) { + adm5120_cfe_parts[4].offset = adm5120_cfe_parts[2].offset + + adm5120_cfe_parts[2].size; + if ((adm5120_cfe_parts[4].offset % mtd->erasesize) > 0) { + adm5120_cfe_parts[4].offset += mtd->erasesize - + (adm5120_cfe_parts[4].offset % mtd->erasesize); + } + adm5120_cfe_parts[4].size = adm5120_cfe_parts[3].offset - + adm5120_cfe_parts[4].offset; + } else { + adm5120_cfe_parts[4].offset = adm5120_cfe_parts[2].offset + + adm5120_cfe_parts[2].size; + if ((adm5120_cfe_parts[4].offset % mtd->erasesize) > 0) { + adm5120_cfe_parts[4].offset += mtd->erasesize - + (adm5120_cfe_parts[4].offset % mtd->erasesize); + } + adm5120_cfe_parts[4].size = size - adm5120_cfe_parts[3].size - + adm5120_cfe_parts[4].offset; + } + } + + 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 + printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE); + adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_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; -module_init(adm5120_mtd_init); -module_exit(adm5120_mtd_exit); + size = adm5120_mtd->size; + + printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR); + +#ifdef CONFIG_MTD_PARTITIONS + + if (adm5120_info.boot_loader == BOOT_LOADER_CFE) + { + 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_info.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_LICENSE("GPL"); -MODULE_AUTHOR("Jeroen Vreeken (pe1rxq@amsat.org)"); -MODULE_DESCRIPTION("MTD map driver for ADM5120 boards"); +module_init(init_adm5120_map); +module_exit(cleanup_adm5120_map);