diff options
Diffstat (limited to 'target/linux/ar7/files/drivers/mtd/ac49xpart.c')
| -rw-r--r-- | target/linux/ar7/files/drivers/mtd/ac49xpart.c | 220 |
1 files changed, 0 insertions, 220 deletions
diff --git a/target/linux/ar7/files/drivers/mtd/ac49xpart.c b/target/linux/ar7/files/drivers/mtd/ac49xpart.c deleted file mode 100644 index 1f937f0f7..000000000 --- a/target/linux/ar7/files/drivers/mtd/ac49xpart.c +++ /dev/null @@ -1,220 +0,0 @@ -/* - * AudioCodes AC49x PSPBoot-based flash partition table - * Copyright 2012 Daniel Golle <daniel.golle@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 - * - */ - -#include <linux/kernel.h> -#include <linux/slab.h> - -#include <linux/mtd/mtd.h> -#include <linux/mtd/partitions.h> -#include <linux/bootmem.h> -#include <linux/magic.h> -#include <linux/module.h> - -#include <asm/mach-ar7/prom.h> - -#define AC49X_MAXENVPARTS 8 - -#define AC49X_PARTTYPE_LOADER 0 -#define AC49X_PARTTYPE_BOOTENV 1 -#define AC49X_PARTTYPE_LINUX 2 -#define AC49X_PARTTYPE_ROOTFS 3 -#define AC49X_PARTTYPE_UNKNOWN 4 -#define AC49X_NUM_PARTTYPES 5 - -#define AC49X_FLASH_ADDRMASK 0x00FFFFFF - -#define AC49X_LOADER_MAGIC 0x40809000 -#define AC49X_LINUX_MAGIC 0x464c457f /* ELF */ -#define AC49X_BOOTENV_MAGIC 0x4578614d /* MaxE */ - -#define ROOTFS_MIN_OFFSET 0xC0000 - -int parse_partvar(const unsigned char *partvar, struct mtd_partition *part) -{ - unsigned int partstart, partend; - unsigned int pnum; - - pnum = sscanf(partvar, "0x%x,0x%x", &partstart, &partend); - if (pnum != 2) - return 1; - - part->offset = partstart & AC49X_FLASH_ADDRMASK; - part->size = partend - partstart; - - return 0; -} - -int detect_parttype(struct mtd_info *master, struct mtd_partition part) -{ - unsigned int magic; - size_t len; - - if (part.size < 4) - return -1; - - mtd_read(master, part.offset, sizeof(magic), &len, - (uint8_t *)&magic); - - if (len != sizeof(magic)) - return -1; - - switch (magic) { - case AC49X_LOADER_MAGIC: - return AC49X_PARTTYPE_LOADER; - case AC49X_LINUX_MAGIC: - return AC49X_PARTTYPE_LINUX; - case SQUASHFS_MAGIC: - case CRAMFS_MAGIC: - case CRAMFS_MAGIC_WEND: - return AC49X_PARTTYPE_ROOTFS; - case AC49X_BOOTENV_MAGIC: - return AC49X_PARTTYPE_BOOTENV; - default: - switch (magic & 0xFF) { - case JFFS2_SUPER_MAGIC: - return AC49X_PARTTYPE_ROOTFS; - } - switch (magic >> 8) { - case JFFS2_SUPER_MAGIC: - return AC49X_PARTTYPE_ROOTFS; - } - return AC49X_PARTTYPE_UNKNOWN; - } -} - -const char *partnames[] = { - "loader", - "config", - "linux", - "rootfs", - "data" -}; - -void gen_partname(unsigned int type, - unsigned int *typenumeration, - struct mtd_partition *part) -{ - char *s = kzalloc(sizeof(char) * 8, GFP_KERNEL); - - (typenumeration[type])++; - if (typenumeration[type] == 1) - sprintf(s, "%s", partnames[type]); - else - sprintf(s, "%s%d", partnames[type], typenumeration[type]); - - part->name = s; -} - -static int create_mtd_partitions(struct mtd_info *master, - struct mtd_partition **pparts, - struct mtd_part_parser_data *data) -{ - unsigned int envpartnum = 0, linuxpartnum = 0; - unsigned int typenumeration[5] = { 0, 0, 0, 0, 0 }; - unsigned char evn[5]; - const unsigned char *partvar = NULL; - - struct mtd_partition *ac49x_parts; - - ac49x_parts = kzalloc(sizeof(*ac49x_parts) * AC49X_MAXENVPARTS, - GFP_KERNEL); - - if (!ac49x_parts) - return -ENOMEM; - - linuxpartnum = 0; - for (envpartnum = 0; envpartnum < AC49X_MAXENVPARTS; envpartnum++) { - struct mtd_partition parsepart; - unsigned int offset, size, type; - int err; - sprintf(evn, "mtd%d", envpartnum); - partvar = prom_getenv(evn); - if (!partvar) - continue; - err = parse_partvar(partvar, &parsepart); - if (err) - continue; - offset = parsepart.offset; - size = parsepart.size; - type = detect_parttype(master, parsepart); - gen_partname(type, typenumeration, &parsepart); - /* protect loader */ - if (type == AC49X_PARTTYPE_LOADER) - parsepart.mask_flags = MTD_WRITEABLE; - else - parsepart.mask_flags = 0; - - memcpy(&(ac49x_parts[linuxpartnum]), &parsepart, - sizeof(struct mtd_partition)); - - /* scan for contained rootfs */ - if (type == AC49X_PARTTYPE_LINUX) { - parsepart.offset += ROOTFS_MIN_OFFSET & - ~(master->erasesize - 1); - parsepart.size -= ROOTFS_MIN_OFFSET & - ~(master->erasesize - 1); - do { - unsigned int size, offset; - size = parsepart.size; - offset = parsepart.offset; - - type = detect_parttype(master, parsepart); - if (type == AC49X_PARTTYPE_ROOTFS) { - gen_partname(type, typenumeration, - &parsepart); - printk(KERN_INFO - "%s %s: 0x%08x@0x%08x\n", - "detected sub-partition", - parsepart.name, - (unsigned int)parsepart.size, - (unsigned int)parsepart.offset); - linuxpartnum++; - memcpy(&(ac49x_parts[linuxpartnum]), - &parsepart, - sizeof(struct mtd_partition)); - break; - } - parsepart.offset += master->erasesize; - parsepart.size -= master->erasesize; - } while (parsepart.size >= master->erasesize); - } - linuxpartnum++; - } - - *pparts = ac49x_parts; - return linuxpartnum; -} - -static struct mtd_part_parser ac49x_parser = { - .owner = THIS_MODULE, - .parse_fn = create_mtd_partitions, - .name = "ac49xpart", -}; - -static int __init ac49x_parser_init(void) -{ - return register_mtd_parser(&ac49x_parser); -} - -module_init(ac49x_parser_init); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Daniel Golle <daniel.golle@gmail.com>"); -MODULE_DESCRIPTION("MTD partitioning for AudioCodes AC49x"); |