On 15 October 2012 11:43, Daniel Golle <dgo...@allnet.de> wrote:
>
> Signed-off-by: Daniel Golle <dgo...@allnet.de>
> ---
> target/linux/ar7/files/drivers/mtd/ac49xpart.c | 199
> +++++++++++++++++++++
> .../ar7/patches-3.3/320-ac49x-mtd-partitions.patch | 41 +++++
> 2 files changed, 240 insertions(+)
> create mode 100644 target/linux/ar7/files/drivers/mtd/ac49xpart.c
> create mode 100644
> target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
>
> diff --git a/target/linux/ar7/files/drivers/mtd/ac49xpart.c
> b/target/linux/ar7/files/drivers/mtd/ac49xpart.c
> new file mode 100644
> index 0000000..1eb19b5
> --- /dev/null
> +++ b/target/linux/ar7/files/drivers/mtd/ac49xpart.c
> @@ -0,0 +1,199 @@
> +/*
> + * AudioCodes AC49x PSPBoot-based flash partition table
> + * Copyright 2012 Daniel Golle <daniel.go...@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
No C99 comments, please.
> +
> +#define ROOTFS_MIN_OFFSET 0xC0000
> +
> +int parse_partvar(const unsigned char *partvar, struct mtd_partition *part)
> +{
> + unsigned int partstart, partend;
> + unsigned int pnum;
You should try to keep this as close to the kernel style as possible
to make upstreaming it easier, so empty line here, please.
> + pnum = sscanf(partvar, "0x%x,0x%x", &partstart, &partend);
> + if (pnum != 2) return 1;
The return needs to be on a separate line.
> + 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;
Same here.
> +
> + mtd_read(master, part.offset, sizeof(magic), &len,
> + (uint8_t *)&magic);
> +
> + if (len != sizeof(magic)) return -1;
And here.
> +
> + 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;
> + }
Why these two switch statements with only one condition, why not
if ((magic & 0xFF) == JFFS2_SUPER_MAGIC ||
(magic >> 8) == JFFS2_SUPER_MAGIC)
> + 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;
Missing spaces around the equal sign.
> + for (envpartnum = 0; envpartnum < AC49X_MAXENVPARTS; envpartnum++)
> + {
opening brace belongs at the end of the previous line.
> + struct mtd_partition parsepart;
> + unsigned int offset, size, type;
> + int err;
Missing empty line here.
> + sprintf(evn, "mtd%d", envpartnum);
> + partvar = prom_getenv(evn);
> + if ( ! partvar ) continue;
You know the drill ;-). Also unnecessary spaces before/after the
condition and after !
> + err = parse_partvar(partvar, &parsepart);
> + if ( err ) continue;
ctrl-c, ctrl-v.
> + offset = parsepart.offset;
> + size = parsepart.size;
> + type = detect_parttype(master, parsepart);
> + gen_partname(type, typenumeration, &parsepart);
> + /* protect loader */
> + if ( type == AC49X_PARTTYPE_LOADER )
Unnecessary spaces.
> + parsepart.mask_flags = MTD_WRITEABLE;
> + else
> + parsepart.mask_flags = 0;
> +
> + memcpy(&(ac49x_parts[linuxpartnum]), &parsepart,
> sizeof(struct mtd_partition));
unnecessary paranthesis around ac49x_part[]
> +
> + /* scan for contained rootfs */
> + if ( type == AC49X_PARTTYPE_LINUX ) {
Spaces.
> + parsepart.offset += ROOTFS_MIN_OFFSET & ~(
> master->erasesize - 1 );
> + parsepart.size -= ROOTFS_MIN_OFFSET & ~(
> master->erasesize - 1 );
Spaces.
> + 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 "detected
> sub-partition %s: 0x%08x@0x%08x\n",
> + parsepart.name, (unsigned
> int)parsepart.size, (unsigned int)parsepart.offset);
pr_info() please.
> + 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.go...@gmail.com>");
> +MODULE_DESCRIPTION("MTD partitioning for AudioCodes AC49X");
> diff --git a/target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
> b/target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
> new file mode 100644
> index 0000000..4ddd4c5
> --- /dev/null
> +++ b/target/linux/ar7/patches-3.3/320-ac49x-mtd-partitions.patch
> @@ -0,0 +1,41 @@
> +Index: linux-3.3.8/drivers/mtd/maps/physmap.c
> +===================================================================
> +--- linux-3.3.8.orig/drivers/mtd/maps/physmap.c
> ++++ linux-3.3.8/drivers/mtd/maps/physmap.c
> +@@ -78,7 +78,7 @@ static const char *rom_probe_types[] = {
> + "map_rom",
> + NULL };
> + static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs",
> +- "ar7part", NULL };
> ++ "ac49xpart", "ar7part", NULL };
> +
> + static int physmap_flash_probe(struct platform_device *dev)
> + {
> +Index: linux-3.3.8/drivers/mtd/Kconfig
> +===================================================================
> +--- linux-3.3.8.orig/drivers/mtd/Kconfig
> ++++ linux-3.3.8/drivers/mtd/Kconfig
> +@@ -143,6 +143,11 @@ config MTD_OF_PARTS
> + the partition map from the children of the flash node,
> + as described in Documentation/devicetree/booting-without-of.txt.
> +
> ++config MTD_AC49X_PARTS
> ++ tristate "AudioCodes AC49X partitioning support"
> ++ ---help---
> ++ AudioCodes AC49X partitioning support
> ++
> + config MTD_AR7_PARTS
> + tristate "TI AR7 partitioning support"
> + ---help---
> +Index: linux-3.3.8/drivers/mtd/Makefile
> +===================================================================
> +--- linux-3.3.8.orig/drivers/mtd/Makefile
> ++++ linux-3.3.8/drivers/mtd/Makefile
> +@@ -9,6 +9,7 @@ mtd-y := mtdcore.o mtdsuper.o
> mtdconc
> + obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o
> + obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
> + obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
> ++obj-$(CONFIG_MTD_AC49X_PARTS) += ac49xpart.o
> + obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
> + obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o titanpart.o
> + obj-$(CONFIG_MTD_BCM63XX_PARTS) += bcm63xxpart.o
> --
> 1.7.12.2
>
>
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>
Jonas
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