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[ar7] detect AC49x flash partitions
Signed-off-by: Daniel Golle <dgolle@allnet.de> Signed-off-by: Florian Fainelli <florian@openwrt.org> git-svn-id: svn://svn.openwrt.org/openwrt/trunk@34146 3c298f89-4303-0410-b956-a3cf2f4a3e73
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florian
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target/linux/ar7/files/drivers/mtd/ac49xpart.c
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target/linux/ar7/files/drivers/mtd/ac49xpart.c
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/*
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* AudioCodes AC49x PSPBoot-based flash partition table
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* Copyright 2012 Daniel Golle <daniel.golle@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/bootmem.h>
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#include <linux/magic.h>
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#include <linux/module.h>
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#include <asm/mach-ar7/prom.h>
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#define AC49X_MAXENVPARTS 8
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#define AC49X_PARTTYPE_LOADER 0
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#define AC49X_PARTTYPE_BOOTENV 1
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#define AC49X_PARTTYPE_LINUX 2
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#define AC49X_PARTTYPE_ROOTFS 3
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#define AC49X_PARTTYPE_UNKNOWN 4
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#define AC49X_NUM_PARTTYPES 5
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#define AC49X_FLASH_ADDRMASK 0x00FFFFFF
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#define AC49X_LOADER_MAGIC 0x40809000
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#define AC49X_LINUX_MAGIC 0x464c457f /* ELF */
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#define AC49X_BOOTENV_MAGIC 0x4578614d /* MaxE */
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#define ROOTFS_MIN_OFFSET 0xC0000
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int parse_partvar(const unsigned char *partvar, struct mtd_partition *part)
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{
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unsigned int partstart, partend;
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unsigned int pnum;
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pnum = sscanf(partvar, "0x%x,0x%x", &partstart, &partend);
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if (pnum != 2)
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return 1;
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part->offset = partstart & AC49X_FLASH_ADDRMASK;
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part->size = partend - partstart;
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return 0;
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}
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int detect_parttype(struct mtd_info *master, struct mtd_partition part)
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{
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unsigned int magic;
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size_t len;
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if (part.size < 4)
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return -1;
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mtd_read(master, part.offset, sizeof(magic), &len,
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(uint8_t *)&magic);
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if (len != sizeof(magic))
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return -1;
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switch (magic) {
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case AC49X_LOADER_MAGIC:
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return AC49X_PARTTYPE_LOADER;
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case AC49X_LINUX_MAGIC:
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return AC49X_PARTTYPE_LINUX;
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case SQUASHFS_MAGIC:
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case CRAMFS_MAGIC:
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case CRAMFS_MAGIC_WEND:
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return AC49X_PARTTYPE_ROOTFS;
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case AC49X_BOOTENV_MAGIC:
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return AC49X_PARTTYPE_BOOTENV;
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default:
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switch (magic & 0xFF) {
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case JFFS2_SUPER_MAGIC:
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return AC49X_PARTTYPE_ROOTFS;
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}
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switch (magic >> 8) {
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case JFFS2_SUPER_MAGIC:
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return AC49X_PARTTYPE_ROOTFS;
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}
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return AC49X_PARTTYPE_UNKNOWN;
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}
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}
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const char *partnames[] = {
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"loader",
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"config",
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"linux",
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"rootfs",
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"data"
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};
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void gen_partname(unsigned int type,
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unsigned int *typenumeration,
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struct mtd_partition *part)
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{
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char *s = kzalloc(sizeof(char) * 8, GFP_KERNEL);
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(typenumeration[type])++;
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if (typenumeration[type] == 1)
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sprintf(s, "%s", partnames[type]);
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else
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sprintf(s, "%s%d", partnames[type], typenumeration[type]);
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part->name = s;
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}
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static int create_mtd_partitions(struct mtd_info *master,
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struct mtd_partition **pparts,
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struct mtd_part_parser_data *data)
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{
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unsigned int envpartnum = 0, linuxpartnum = 0;
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unsigned int typenumeration[5] = { 0, 0, 0, 0, 0 };
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unsigned char evn[5];
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const unsigned char *partvar = NULL;
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struct mtd_partition *ac49x_parts;
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ac49x_parts = kzalloc(sizeof(*ac49x_parts) * AC49X_MAXENVPARTS,
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GFP_KERNEL);
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if (!ac49x_parts)
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return -ENOMEM;
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linuxpartnum = 0;
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for (envpartnum = 0; envpartnum < AC49X_MAXENVPARTS; envpartnum++) {
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struct mtd_partition parsepart;
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unsigned int offset, size, type;
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int err;
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sprintf(evn, "mtd%d", envpartnum);
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partvar = prom_getenv(evn);
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if (!partvar)
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continue;
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err = parse_partvar(partvar, &parsepart);
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if (err)
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continue;
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offset = parsepart.offset;
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size = parsepart.size;
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type = detect_parttype(master, parsepart);
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gen_partname(type, typenumeration, &parsepart);
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/* protect loader */
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if (type == AC49X_PARTTYPE_LOADER)
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parsepart.mask_flags = MTD_WRITEABLE;
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else
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parsepart.mask_flags = 0;
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memcpy(&(ac49x_parts[linuxpartnum]), &parsepart,
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sizeof(struct mtd_partition));
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/* scan for contained rootfs */
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if (type == AC49X_PARTTYPE_LINUX) {
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parsepart.offset += ROOTFS_MIN_OFFSET &
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~(master->erasesize - 1);
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parsepart.size -= ROOTFS_MIN_OFFSET &
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~(master->erasesize - 1);
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do {
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unsigned int size, offset;
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size = parsepart.size;
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offset = parsepart.offset;
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type = detect_parttype(master, parsepart);
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if (type == AC49X_PARTTYPE_ROOTFS) {
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gen_partname(type, typenumeration,
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&parsepart);
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printk(KERN_INFO
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"%s %s: 0x%08x@0x%08x\n",
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"detected sub-partition",
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parsepart.name,
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(unsigned int)parsepart.size,
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(unsigned int)parsepart.offset);
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linuxpartnum++;
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memcpy(&(ac49x_parts[linuxpartnum]),
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&parsepart,
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sizeof(struct mtd_partition));
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break;
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}
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parsepart.offset += master->erasesize;
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parsepart.size -= master->erasesize;
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} while (parsepart.size >= master->erasesize);
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}
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linuxpartnum++;
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}
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*pparts = ac49x_parts;
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return linuxpartnum;
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}
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static struct mtd_part_parser ac49x_parser = {
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.owner = THIS_MODULE,
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.parse_fn = create_mtd_partitions,
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.name = "ac49xpart",
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};
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static int __init ac49x_parser_init(void)
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{
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return register_mtd_parser(&ac49x_parser);
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}
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module_init(ac49x_parser_init);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Daniel Golle <daniel.golle@gmail.com>");
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MODULE_DESCRIPTION("MTD partitioning for AudioCodes AC49x");
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35
target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
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35
target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
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@ -0,0 +1,35 @@
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--- a/drivers/mtd/maps/physmap.c
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+++ b/drivers/mtd/maps/physmap.c
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@@ -78,7 +78,7 @@ static const char *rom_probe_types[] = {
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"map_rom",
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NULL };
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static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs",
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- "ar7part", NULL };
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+ "ac49xpart", "ar7part", NULL };
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static int physmap_flash_probe(struct platform_device *dev)
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{
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--- a/drivers/mtd/Kconfig
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+++ b/drivers/mtd/Kconfig
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@@ -143,6 +143,11 @@ config MTD_OF_PARTS
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the partition map from the children of the flash node,
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as described in Documentation/devicetree/booting-without-of.txt.
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+config MTD_AC49X_PARTS
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+ tristate "AudioCodes AC49X partitioning support"
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+ ---help---
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+ AudioCodes AC49X partitioning support
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+
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config MTD_AR7_PARTS
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tristate "TI AR7 partitioning support"
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---help---
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--- a/drivers/mtd/Makefile
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+++ b/drivers/mtd/Makefile
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@@ -9,6 +9,7 @@ mtd-y := mtdcore.o mtdsuper.o mtdconc
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obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o
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obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
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obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
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+obj-$(CONFIG_MTD_AC49X_PARTS) += ac49xpart.o
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obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
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obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o titanpart.o
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obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
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