diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/mtd/bcm63xxpart.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/mtd/bcm63xxpart.c | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/ANDROID_3.4.5/drivers/mtd/bcm63xxpart.c b/ANDROID_3.4.5/drivers/mtd/bcm63xxpart.c deleted file mode 100644 index 608321ee..00000000 --- a/ANDROID_3.4.5/drivers/mtd/bcm63xxpart.c +++ /dev/null @@ -1,222 +0,0 @@ -/* - * BCM63XX CFE image tag parser - * - * Copyright © 2006-2008 Florian Fainelli <florian@openwrt.org> - * Mike Albon <malbon@openwrt.org> - * Copyright © 2009-2010 Daniel Dickinson <openwrt@cshore.neomailbox.net> - * Copyright © 2011 Jonas Gorski <jonas.gorski@gmail.com> - * - * 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 program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - * - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/crc32.h> -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/partitions.h> - -#include <asm/mach-bcm63xx/bcm963xx_tag.h> -#include <asm/mach-bcm63xx/board_bcm963xx.h> - -#define BCM63XX_EXTENDED_SIZE 0xBFC00000 /* Extended flash address */ - -#define BCM63XX_MIN_CFE_SIZE 0x10000 /* always at least 64KiB */ -#define BCM63XX_MIN_NVRAM_SIZE 0x10000 /* always at least 64KiB */ - -#define BCM63XX_CFE_MAGIC_OFFSET 0x4e0 - -static int bcm63xx_detect_cfe(struct mtd_info *master) -{ - char buf[9]; - int ret; - size_t retlen; - - ret = mtd_read(master, BCM963XX_CFE_VERSION_OFFSET, 5, &retlen, - (void *)buf); - buf[retlen] = 0; - - if (ret) - return ret; - - if (strncmp("cfe-v", buf, 5) == 0) - return 0; - - /* very old CFE's do not have the cfe-v string, so check for magic */ - ret = mtd_read(master, BCM63XX_CFE_MAGIC_OFFSET, 8, &retlen, - (void *)buf); - buf[retlen] = 0; - - return strncmp("CFE1CFE1", buf, 8); -} - -static int bcm63xx_parse_cfe_partitions(struct mtd_info *master, - struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - /* CFE, NVRAM and global Linux are always present */ - int nrparts = 3, curpart = 0; - struct bcm_tag *buf; - struct mtd_partition *parts; - int ret; - size_t retlen; - unsigned int rootfsaddr, kerneladdr, spareaddr; - unsigned int rootfslen, kernellen, sparelen, totallen; - unsigned int cfelen, nvramlen; - int namelen = 0; - int i; - u32 computed_crc; - - if (bcm63xx_detect_cfe(master)) - return -EINVAL; - - cfelen = max_t(uint32_t, master->erasesize, BCM63XX_MIN_CFE_SIZE); - nvramlen = max_t(uint32_t, master->erasesize, BCM63XX_MIN_NVRAM_SIZE); - - /* Allocate memory for buffer */ - buf = vmalloc(sizeof(struct bcm_tag)); - if (!buf) - return -ENOMEM; - - /* Get the tag */ - ret = mtd_read(master, cfelen, sizeof(struct bcm_tag), &retlen, - (void *)buf); - - if (retlen != sizeof(struct bcm_tag)) { - vfree(buf); - return -EIO; - } - - computed_crc = crc32_le(IMAGETAG_CRC_START, (u8 *)buf, - offsetof(struct bcm_tag, header_crc)); - if (computed_crc == buf->header_crc) { - char *boardid = &(buf->board_id[0]); - char *tagversion = &(buf->tag_version[0]); - - sscanf(buf->kernel_address, "%u", &kerneladdr); - sscanf(buf->kernel_length, "%u", &kernellen); - sscanf(buf->total_length, "%u", &totallen); - - pr_info("CFE boot tag found with version %s and board type %s\n", - tagversion, boardid); - - kerneladdr = kerneladdr - BCM63XX_EXTENDED_SIZE; - rootfsaddr = kerneladdr + kernellen; - spareaddr = roundup(totallen, master->erasesize) + cfelen; - sparelen = master->size - spareaddr - nvramlen; - rootfslen = spareaddr - rootfsaddr; - } else { - pr_warn("CFE boot tag CRC invalid (expected %08x, actual %08x)\n", - buf->header_crc, computed_crc); - kernellen = 0; - rootfslen = 0; - rootfsaddr = 0; - spareaddr = cfelen; - sparelen = master->size - cfelen - nvramlen; - } - - /* Determine number of partitions */ - namelen = 8; - if (rootfslen > 0) { - nrparts++; - namelen += 6; - } - if (kernellen > 0) { - nrparts++; - namelen += 6; - } - - /* Ask kernel for more memory */ - parts = kzalloc(sizeof(*parts) * nrparts + 10 * nrparts, GFP_KERNEL); - if (!parts) { - vfree(buf); - return -ENOMEM; - } - - /* Start building partition list */ - parts[curpart].name = "CFE"; - parts[curpart].offset = 0; - parts[curpart].size = cfelen; - 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; - if (sparelen > 0) - parts[curpart].size += sparelen; - curpart++; - } - - parts[curpart].name = "nvram"; - parts[curpart].offset = master->size - nvramlen; - parts[curpart].size = nvramlen; - - /* Global partition "linux" to make easy firmware upgrade */ - curpart++; - parts[curpart].name = "linux"; - parts[curpart].offset = cfelen; - parts[curpart].size = master->size - cfelen - nvramlen; - - for (i = 0; i < nrparts; i++) - pr_info("Partition %d is %s offset %lx and length %lx\n", i, - parts[i].name, (long unsigned int)(parts[i].offset), - (long unsigned int)(parts[i].size)); - - pr_info("Spare partition is offset %x and length %x\n", spareaddr, - sparelen); - - *pparts = parts; - vfree(buf); - - return nrparts; -}; - -static struct mtd_part_parser bcm63xx_cfe_parser = { - .owner = THIS_MODULE, - .parse_fn = bcm63xx_parse_cfe_partitions, - .name = "bcm63xxpart", -}; - -static int __init bcm63xx_cfe_parser_init(void) -{ - return register_mtd_parser(&bcm63xx_cfe_parser); -} - -static void __exit bcm63xx_cfe_parser_exit(void) -{ - deregister_mtd_parser(&bcm63xx_cfe_parser); -} - -module_init(bcm63xx_cfe_parser_init); -module_exit(bcm63xx_cfe_parser_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Daniel Dickinson <openwrt@cshore.neomailbox.net>"); -MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>"); -MODULE_AUTHOR("Mike Albon <malbon@openwrt.org>"); -MODULE_AUTHOR("Jonas Gorski <jonas.gorski@gmail.com"); -MODULE_DESCRIPTION("MTD partitioning for BCM63XX CFE bootloaders"); |