diff options
| -rw-r--r-- | target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c | 596 |
1 files changed, 412 insertions, 184 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 index 2bbb238c3..1fdbc7f10 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 @@ -1,234 +1,462 @@ /* - * Flash device on the ADM5120 board + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org> + * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org) * - * Copyright Florian Fainelli <florian@openwrt.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 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 <linux/autoconf.h> +#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> +#ifdef CONFIG_MTD_PARTITIONS #include <linux/mtd/partitions.h> -#include <linux/vmalloc.h> +#endif +#include <linux/squashfs_fs.h> +#include <linux/jffs2.h> +#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 -#define FLASH_PHYS_ADDR 0x1FC00000 -#define FLASH_SIZE 0x400000 +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 IMAGE_LEN 10 /* Length of Length Field */ -#define ADDRESS_LEN 12 /* Length of Address field */ -#define EXTENDED_SIZE 0xBFC00000 /* Extended flash address */ #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; +#endif static struct mtd_info *adm5120_mtd; -static struct mtd_partition *parsed_parts; -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, +}; + +#ifdef CONFIG_MTD_PARTITIONS + +static struct mtd_partition adm5120_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 parse_cfe_partitions( struct mtd_info *master, struct mtd_partition **pparts) +static int __init +find_cfe_size(struct mtd_info *mtd, size_t size) { - int nrparts = 2, curpart = 0; // CFE and NVRAM always present. - struct adm5120_cfe_map { - unsigned char tagVersion[4]; // Version of the image tag - unsigned char sig_1[20]; // Company Line 1 - unsigned char sig_2[14]; // Company Line 2 - unsigned char chipid[6]; // Chip this image is for - unsigned char boardid[16]; // Board name - unsigned char bigEndian[2]; // Map endianness -- 1 BE 0 LE - unsigned char totalLength[IMAGE_LEN]; //Total length of image - unsigned char cfeAddress[ADDRESS_LEN]; // Address in memory of CFE - unsigned char cfeLength[IMAGE_LEN]; // Size of CFE - unsigned char rootAddress[ADDRESS_LEN]; // Address in memory of rootfs - unsigned char rootLength[IMAGE_LEN]; // Size of rootfs - unsigned char kernelAddress[ADDRESS_LEN]; // Address in memory of kernel - unsigned char kernelLength[IMAGE_LEN]; // Size of kernel - unsigned char dualImage[2]; // Unused at present - unsigned char inactiveFlag[2]; // Unused at present - unsigned char reserved1[74]; // Reserved area not in use - unsigned char imageCRC[4]; // CRC32 of images - unsigned char reserved2[16]; // Unused at present - unsigned char headerCRC[4]; // CRC32 of header excluding tagVersion - unsigned char reserved3[16]; // Unused at present - } *buf; - struct mtd_partition *parts; - int ret; - size_t retlen; - unsigned int rootfsaddr, kerneladdr, spareaddr; - unsigned int rootfslen, kernellen, sparelen, totallen; - int namelen = 0; - int i; - // Allocate memory for buffer - buf = vmalloc(sizeof(struct adm5120_cfe_map)); + struct trx_header *trx; + unsigned char buf[512]; + int off; + size_t len; + int blocksize; - if (!buf) - return -ENOMEM; + trx = (struct trx_header *) buf; - // Get the tag - ret = master->read(master,master->erasesize,sizeof(struct adm5120_cfe_map), &retlen, (void *)buf); + blocksize = mtd->erasesize; + if (blocksize < 0x10000) + blocksize = 0x10000; - if (retlen != sizeof(struct adm5120_cfe_map)){ - vfree(buf); - return -EIO; - }; - - printk("adm5120: CFE boot tag found with version %s and board type %s.\n",buf->tagVersion,buf->boardid); - // Get the values and calculate - sscanf(buf->rootAddress,"%u", &rootfsaddr); - rootfsaddr = rootfsaddr - EXTENDED_SIZE; - sscanf(buf->rootLength, "%u", &rootfslen); - sscanf(buf->kernelAddress, "%u", &kerneladdr); - kerneladdr = kerneladdr - EXTENDED_SIZE; - sscanf(buf->kernelLength, "%u", &kernellen); - sscanf(buf->totalLength, "%u", &totallen); - spareaddr = ROUNDUP(totallen,master->erasesize) + master->erasesize; - sparelen = master->size - spareaddr - master->erasesize; - // Determine number of partitions - namelen = 8; - if (rootfslen > 0){ - nrparts++; - namelen =+ 6; - }; - - if (kernellen > 0){ - nrparts++; - namelen =+ 6; - }; - if (sparelen > 0){ - nrparts++; - namelen =+ 6; - }; - // Ask kernel for more memory. - parts = kmalloc(sizeof(*parts)*nrparts+10*nrparts, GFP_KERNEL); - if (!parts){ - vfree(buf); - return -ENOMEM; - }; - memset(parts,0,sizeof(*parts)*nrparts+10*nrparts); - // Start building partition list - parts[curpart].name = "CFE"; - parts[curpart].offset = 0; - parts[curpart].size = master->erasesize; - curpart++; - if (kernellen > 0) { - parts[curpart].name = "Kernel"; - parts[curpart].offset = kerneladdr; - parts[curpart].size = kernellen; - curpart++; - }; - if (rootfslen > 0) { - parts[curpart].name = "Rootfs"; - parts[curpart].offset = rootfsaddr; - parts[curpart].size = rootfslen; - curpart++; - }; - if (sparelen > 0){ - parts[curpart].name = "OpenWrt"; - parts[curpart].offset = spareaddr; - parts[curpart].size = sparelen; - curpart++; - }; - parts[curpart].name = "NVRAM"; - parts[curpart].offset = master->size - master->erasesize; - parts[curpart].size = master->erasesize; - for (i = 0; i < nrparts; i++) { - printk("adm5120: Partition %d is %s offset %x and length %x\n", i, parts[i].name, parts[i].offset, parts[i].size); + 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; + } } - *pparts = parts; - vfree(buf); - return nrparts; -}; -static int adm5120_detect_cfe(struct mtd_info *master) + 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) { - int idoffset = 0x4e0; -#ifdef CONFIG_CPU_BIG_ENDIAN - static char idstring[8] = "CFE1CFE1"; -#else - static char idstring[8] = "1EFC1EFC"; -#endif - char buf[8]; - int ret; + 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); - ret = master->read(master, idoffset, 8, &retlen, (void *)buf); - printk("adm5120: Read Signature value of %s\n", buf); - return strcmp(idstring,buf); + /* + * 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 adm5120_mtd_init(void) + + + +static int __init +find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part) { - printk(KERN_INFO "ADM5120 board flash (0x%08x at 0x%08x)\n", FLASH_SIZE, - FLASH_PHYS_ADDR); + 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; - adm5120_mtd_map.virt = ioremap(FLASH_PHYS_ADDR, FLASH_SIZE); + blocksize = mtd->erasesize; + if (blocksize < 0x10000) + blocksize = 0x10000; - if (!adm5120_mtd_map.virt) { - printk("ADM5120: failed to ioremap\n"); - return -EIO; + 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; + } } - - simple_map_init(&adm5120_mtd_map); - adm5120_mtd = do_map_probe("cfi_probe", &adm5120_mtd_map); + printk(KERN_NOTICE + "%s: Couldn't find root filesystem\n", + mtd->name); + return -1; - if (adm5120_mtd) { - adm5120_mtd->owner = THIS_MODULE; + 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; + } + + 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; + } - if (adm5120_detect_cfe(adm5120_mtd) == 0) - { - int parsed_nr_parts = 0; - char * part_type; - - printk("adm5120: CFE bootloader detected\n"); - - if (parsed_nr_parts == 0) { - int ret = parse_cfe_partitions(adm5120_mtd, &parsed_parts); - - if (ret > 0) { - part_type = "CFE"; - parsed_nr_parts = ret; - } + 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_parts[0].offset = 0; + adm5120_parts[0].size = cfe_size; + + /* nvram */ + if (cfe_size != 384 * 1024) { + adm5120_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize); + adm5120_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); + } else { + /* nvram (old 128kb config partition on netgear wgt634u) */ + adm5120_parts[3].offset = adm5120_parts[0].size; + adm5120_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); + } + + /* linux (kernel and rootfs) */ + if (cfe_size != 384 * 1024) { + adm5120_parts[1].offset = adm5120_parts[0].size; + adm5120_parts[1].size = adm5120_parts[3].offset - + adm5120_parts[1].offset; + } else { + /* do not count the elf loader, which is on one block */ + adm5120_parts[1].offset = adm5120_parts[0].size + + adm5120_parts[3].size + mtd->erasesize; + adm5120_parts[1].size = size - + adm5120_parts[0].size - + (2*adm5120_parts[3].size) - + mtd->erasesize; + } + + /* find and size rootfs */ + if (find_root(mtd,size,&adm5120_parts[2])==0) { + /* entirely jffs2 */ + adm5120_parts[4].name = NULL; + adm5120_parts[2].size = size - adm5120_parts[2].offset - + adm5120_parts[3].size; + } else { + /* legacy setup */ + /* calculate leftover flash, and assign it to the jffs2 partition */ + if (cfe_size != 384 * 1024) { + adm5120_parts[4].offset = adm5120_parts[2].offset + + adm5120_parts[2].size; + if ((adm5120_parts[4].offset % mtd->erasesize) > 0) { + adm5120_parts[4].offset += mtd->erasesize - + (adm5120_parts[4].offset % mtd->erasesize); } - add_mtd_partitions(adm5120_mtd, parsed_parts, parsed_nr_parts); - return 0; + adm5120_parts[4].size = adm5120_parts[3].offset - + adm5120_parts[4].offset; } else { - add_mtd_device(adm5120_mtd); + adm5120_parts[4].offset = adm5120_parts[2].offset + + adm5120_parts[2].size; + if ((adm5120_parts[4].offset % mtd->erasesize) > 0) { + adm5120_parts[4].offset += mtd->erasesize - + (adm5120_parts[4].offset % mtd->erasesize); + } + adm5120_parts[4].size = size - adm5120_parts[3].size - + adm5120_parts[4].offset; } - return 0; } - iounmap(adm5120_mtd); - return -ENXIO; + + return adm5120_parts; } +#endif -static void __exit adm5120_mtd_exit(void) +int __init init_adm5120_map(void) { - if (adm5120_mtd) { - del_mtd_device(adm5120_mtd); - map_destroy(adm5120_mtd); - } +#ifdef CONFIG_SSB + struct ssb_mipscore *mcore = &ssb.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("adm5120 : flash init: 0x%08x 0x%08x\n", window, window_size); + adm5120_map.phys = window; + adm5120_map.size = window_size; + adm5120_map.virt = ioremap_nocache(window, window_size); +#else + printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE); + adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE); +#endif - if (adm5120_mtd_map.virt) { - iounmap(adm5120_mtd_map.virt); - adm5120_mtd_map.virt = 0; + if (!adm5120_map.virt) { + printk("Failed to ioremap\n"); + return -EIO; } + simple_map_init(&adm5120_map); + 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 + 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 + 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; } -module_init(adm5120_mtd_init); -module_exit(adm5120_mtd_exit); +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("Florian Fainelli <florian@openwrt.org>"); -MODULE_DESCRIPTION("MTD map driver for ADM5120 boards"); +module_init(init_adm5120_map); +module_exit(cleanup_adm5120_map); |