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WRT160NL: more mtd parser cleanup

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SVN-Revision: 17201
This commit is contained in:
Gabor Juhos 2009-08-09 12:56:06 +00:00
parent ed5f6f4efa
commit 214f39d46d
1 changed files with 110 additions and 72 deletions
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182
target/linux/ar71xx/files/drivers/mtd/wrt160nl_part.c
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@ -1,5 +1,6 @@
/* /*
* Copyright © 2009 Christian Daniel <cd@maintech.de> * Copyright (C) 2009 Christian Daniel <cd@maintech.de>
* Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
* *
* This program is free software; you can redistribute it and/or modify * 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 * it under the terms of the GNU General Public License as published by
@ -22,11 +23,22 @@
#include <linux/kernel.h> #include <linux/kernel.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/mtd/mtd.h> #include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h> #include <linux/mtd/partitions.h>
#include <linux/bootmem.h>
#include <linux/magic.h> struct cybertan_header {
char magic[4];
u8 res1[4];
char fw_date[3];
char fw_ver[3];
char id[4];
char hw_ver;
char unused;
u8 flags[2];
u8 res2[10];
};
#define TRX_PARTS 6 #define TRX_PARTS 6
#define TRX_MAGIC 0x30524448 #define TRX_MAGIC 0x30524448
@ -58,91 +70,117 @@ struct uimage_header {
uint8_t ih_name[IH_NMLEN]; /* Image Name */ uint8_t ih_name[IH_NMLEN]; /* Image Name */
}; };
struct wrt160nl_header {
struct cybertan_header cybertan;
struct trx_header trx;
struct uimage_header uimage;
} __attribute__ ((packed));
static struct mtd_partition trx_parts[TRX_PARTS]; static struct mtd_partition trx_parts[TRX_PARTS];
static int create_mtd_partitions(struct mtd_info *master, static int wrt160nl_parse_partitions(struct mtd_info *master,
struct mtd_partition **pparts, struct mtd_partition **pparts,
unsigned long origin) unsigned long origin)
{ {
uint8_t buf[512]; struct wrt160nl_header *header;
int len; struct trx_header *theader;
struct trx_header *header;
struct uimage_header *uheader; struct uimage_header *uheader;
size_t retlen;
unsigned int kernel_len; unsigned int kernel_len;
int ret;
master->read(master, 4 * master->erasesize, sizeof(buf), &len, buf); header = vmalloc(sizeof(*header));
if (strncmp(buf, "NL16", 4) == 0) { if (!header) {
printk(KERN_INFO "TRX on WRT160NL detected\n"); return -ENOMEM;
goto out;
header = (struct trx_header *)(buf + 32);
if (le32_to_cpu(header->magic) != TRX_MAGIC) {
printk(KERN_WARNING "TRX messed up\n");
return 0;
}
uheader = (struct uimage_header *)(buf + 60);
if (uheader->ih_magic != IH_MAGIC) {
printk(KERN_WARNING "uImage messed up\n");
return 0;
}
kernel_len = uheader->ih_size / master->erasesize;
if (uheader->ih_size % master->erasesize)
kernel_len++;
kernel_len++;
kernel_len *= master->erasesize;
trx_parts[0].name = "u-boot";
trx_parts[0].offset = 0;
trx_parts[0].size = 4 * master->erasesize;
trx_parts[0].mask_flags = MTD_WRITEABLE;
trx_parts[1].name = "kernel";
trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
trx_parts[1].size = kernel_len;
trx_parts[1].mask_flags = 0;
trx_parts[2].name = "rootfs";
trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size;
trx_parts[2].mask_flags = 0;
trx_parts[3].name = "nvram";
trx_parts[3].offset = master->size - 2 * master->erasesize;
trx_parts[3].size = master->erasesize;
trx_parts[3].mask_flags = MTD_WRITEABLE;
trx_parts[4].name = "art";
trx_parts[4].offset = master->size - master->erasesize;
trx_parts[4].size = master->erasesize;
trx_parts[4].mask_flags = MTD_WRITEABLE;
trx_parts[5].name = "firmware";
trx_parts[5].offset = 4 * master->erasesize;
trx_parts[5].size = master->size - 6 * master->erasesize;
trx_parts[5].mask_flags = 0;
*pparts = trx_parts;
return TRX_PARTS;
} else {
return 0;
} }
ret = master->read(master, 4 * master->erasesize, sizeof(*header),
&retlen, (void *) header);
if (ret)
goto free_hdr;
if (retlen != sizeof(*header)) {
ret = -EIO;
goto free_hdr;
}
if (strncmp(header->cybertan.magic, "NL16", 4) != 0) {
printk(KERN_NOTICE "%s: no WRT160NL signature found\n",
master->name);
goto free_hdr;
}
theader = &header->trx;
if (le32_to_cpu(theader->magic) != TRX_MAGIC) {
printk(KERN_NOTICE "%s: no TRX header found\n", master->name);
goto free_hdr;
}
uheader = &header->uimage;
if (uheader->ih_magic != IH_MAGIC) {
printk(KERN_NOTICE "%s: no uImage found\n", master->name);
goto free_hdr;
}
kernel_len = uheader->ih_size / master->erasesize;
if (uheader->ih_size % master->erasesize)
kernel_len++;
kernel_len++;
kernel_len *= master->erasesize;
trx_parts[0].name = "u-boot";
trx_parts[0].offset = 0;
trx_parts[0].size = 4 * master->erasesize;
trx_parts[0].mask_flags = MTD_WRITEABLE;
trx_parts[1].name = "kernel";
trx_parts[1].offset = trx_parts[0].offset + trx_parts[0].size;
trx_parts[1].size = kernel_len;
trx_parts[1].mask_flags = 0;
trx_parts[2].name = "rootfs";
trx_parts[2].offset = trx_parts[1].offset + trx_parts[1].size;
trx_parts[2].size = master->size - 6 * master->erasesize - trx_parts[1].size;
trx_parts[2].mask_flags = 0;
trx_parts[3].name = "nvram";
trx_parts[3].offset = master->size - 2 * master->erasesize;
trx_parts[3].size = master->erasesize;
trx_parts[3].mask_flags = MTD_WRITEABLE;
trx_parts[4].name = "art";
trx_parts[4].offset = master->size - master->erasesize;
trx_parts[4].size = master->erasesize;
trx_parts[4].mask_flags = MTD_WRITEABLE;
trx_parts[5].name = "firmware";
trx_parts[5].offset = 4 * master->erasesize;
trx_parts[5].size = master->size - 6 * master->erasesize;
trx_parts[5].mask_flags = 0;
*pparts = trx_parts;
ret = TRX_PARTS;
free_hdr:
vfree(header);
out:
return ret;
} }
static struct mtd_part_parser trx_parser = { static struct mtd_part_parser wrt160nl_parser = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
.parse_fn = create_mtd_partitions, .parse_fn = wrt160nl_parse_partitions,
.name = "wrt160nl", .name = "wrt160nl",
}; };
static int __init trx_parser_init(void) static int __init wrt160nl_parser_init(void)
{ {
return register_mtd_parser(&trx_parser); return register_mtd_parser(&wrt160nl_parser);
} }
module_init(trx_parser_init); module_init(wrt160nl_parser_init);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Christian Daniel <cd@maintech.de>"); MODULE_AUTHOR("Christian Daniel <cd@maintech.de>");