* 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
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <asm/io.h>
+#include <linux/io.h>
#include <linux/init.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/magic.h>
#include <linux/platform_device.h>
-static struct map_info
-ifxmips_map = {
- .name = "ifxmips_mtd",
+#ifndef CONFIG_MTD_PARTITIONS
+#error Please enable CONFIG_MTD_PARTITIONS
+#endif
+
+static struct map_info ifxmips_map = {
+ .name = "ifx-nor",
.bankwidth = 2,
.size = 0x400000,
};
-static map_word
-ifxmips_read16(struct map_info * map, unsigned long adr)
+static map_word ifxmips_read16(struct map_info *map, unsigned long adr)
{
unsigned long flags;
map_word temp;
spin_lock_irqsave(&ebu_lock, flags);
adr ^= 2;
- temp.x[0] = *((__u16*)(map->virt + adr));
+ temp.x[0] = *((__u16 *)(map->virt + adr));
spin_unlock_irqrestore(&ebu_lock, flags);
return temp;
}
-static void
-ifxmips_write16(struct map_info *map, map_word d, unsigned long adr)
+static void ifxmips_write16(struct map_info *map, map_word d, unsigned long adr)
{
unsigned long flags;
spin_lock_irqsave(&ebu_lock, flags);
adr ^= 2;
- *((__u16*)(map->virt + adr)) = d.x[0];
+ *((__u16 *)(map->virt + adr)) = d.x[0];
spin_unlock_irqrestore(&ebu_lock, flags);
}
-void
-ifxmips_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+void ifxmips_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
unsigned char *p;
unsigned char *to_8;
unsigned long flags;
spin_lock_irqsave(&ebu_lock, flags);
from = (unsigned long)(from + map->virt);
- p = (unsigned char*) from;
- to_8 = (unsigned char*) to;
- while(len--)
+ p = (unsigned char *) from;
+ to_8 = (unsigned char *) to;
+ while (len--)
*to_8++ = *p++;
spin_unlock_irqrestore(&ebu_lock, flags);
}
-void
-ifxmips_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+void ifxmips_copy_to(struct map_info *map,
+ unsigned long to,
+ const void *from,
+ ssize_t len)
{
- unsigned char *p = (unsigned char*)from;
+ unsigned char *p = (unsigned char *)from;
unsigned char *to_8;
unsigned long flags;
spin_lock_irqsave(&ebu_lock, flags);
to += (unsigned long) map->virt;
- to_8 = (unsigned char*)to;
- while(len--)
+ to_8 = (unsigned char *)to;
+ while (len--)
*p++ = *to_8++;
spin_unlock_irqrestore(&ebu_lock, flags);
}
-static struct mtd_partition
-ifxmips_partitions[] = {
+static struct mtd_partition ifxmips_partitions[] = {
{
- name:"uboot",
- offset:0x00000000,
- size:0x00020000,
+ .name = "uboot",
+ .offset = 0x00000000,
+ .size = 0x00020000,
},
{
- name:"uboot_env",
- offset:0x00020000,
- size:0x00010000,
+ .name = "uboot_env",
+ .offset = 0x00020000,
+ .size = 0x00010000,
},
{
- name:"kernel",
- offset:0x00030000,
- size:0x0,
+ .name = "kernel",
+ .offset = 0x00030000,
+ .size = 0x0,
},
{
- name:"rootfs",
- offset:0x0,
- size:0x0,
+ .name = "rootfs",
+ .offset = 0x0,
+ .size = 0x0,
},
{
- name:"board_config",
- offset:0x0,
- size:0x0,
+ .name = "board_config",
+ .offset = 0x0,
+ .size = 0x0,
},
};
-int
-find_uImage_size(unsigned long start_offset){
+static struct mtd_partition ifxmips_meta_partition = {
+ .name = "linux",
+ .offset = 0x00030000,
+ .size = 0x0,
+};
+
+static const char *part_probe_types[] = { "cmdlinepart", NULL };
+
+int find_uImage_size(unsigned long start_offset)
+{
+ unsigned long magic;
unsigned long temp;
+ ifxmips_copy_from(&ifxmips_map, &magic, start_offset, 4);
+ if (!(ntohl(magic) == 0x27051956)) {
+ printk(KERN_INFO "ifxmips_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", ntohl(magic), start_offset);
+ return 0;
+ }
ifxmips_copy_from(&ifxmips_map, &temp, start_offset + 12, 4);
printk(KERN_INFO "ifxmips_mtd: kernel size is %ld \n", temp + 0x40);
return temp + 0x40;
}
-int
-find_brn_block(unsigned long start_offset){
+int find_brn_block(unsigned long start_offset)
+{
unsigned char temp[9];
ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 8);
temp[8] = '\0';
printk(KERN_INFO "data in brn block %s\n", temp);
- if(memcmp(temp, "BRN-BOOT", 8) == 0)
+ if (memcmp(temp, "BRN-BOOT", 8) == 0)
return 1;
else
return 0;
}
-int
-detect_squashfs_partition(unsigned long start_offset){
+int detect_squashfs_partition(unsigned long start_offset)
+{
unsigned long temp;
ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 4);
- return (temp == SQUASHFS_MAGIC);
+ return temp == SQUASHFS_MAGIC;
}
-static int
-ifxmips_mtd_probe(struct platform_device *dev)
+static int ifxmips_mtd_probe(struct platform_device *dev)
{
struct mtd_info *ifxmips_mtd = NULL;
struct mtd_partition *parts = NULL;
unsigned long uimage_size;
+ int err, i;
+ int kernel_part = 2, rootfs_part = 3;
+ int num_parts = ARRAY_SIZE(ifxmips_partitions);
ifxmips_w32(0x1d7ff, IFXMIPS_EBU_BUSCON0);
ifxmips_map.size = dev->resource->end - ifxmips_map.phys + 1;
ifxmips_map.virt = ioremap_nocache(ifxmips_map.phys, ifxmips_map.size);
- if(!ifxmips_map.virt)
- {
+ if (!ifxmips_map.virt) {
printk(KERN_WARNING "ifxmips_mtd: failed to ioremap!\n");
return -EIO;
}
ifxmips_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &ifxmips_map);
- if(!ifxmips_mtd)
- {
+ if (!ifxmips_mtd) {
iounmap(ifxmips_map.virt);
printk(KERN_WARNING "ifxmips_mtd: probing failed\n");
return -ENXIO;
}
ifxmips_mtd->owner = THIS_MODULE;
- uimage_size = find_uImage_size(ifxmips_partitions[2].offset);
- if(detect_squashfs_partition(ifxmips_partitions[2].offset + uimage_size))
- {
- printk(KERN_INFO "ifxmips_mtd: found a squashfs following the uImage\n");
+ err = parse_mtd_partitions(ifxmips_mtd, part_probe_types, &parts, 0);
+ if (err > 0) {
+ printk(KERN_INFO "ifxmips_mtd: found %d partitions from cmdline\n", err);
+ num_parts = err;
+ kernel_part = 0;
+ rootfs_part = 0;
+ for (i = 0; i < num_parts; i++) {
+ if (strcmp(parts[i].name, "kernel") == 0)
+ kernel_part = i;
+ if (strcmp(parts[i].name, "rootfs") == 0)
+ rootfs_part = i;
+ }
} else {
- uimage_size &= ~0xffff;
- uimage_size += 0x10000;
+ parts = &ifxmips_partitions[0];
}
- parts = &ifxmips_partitions[0];
- ifxmips_partitions[2].size = uimage_size;
- ifxmips_partitions[3].offset = ifxmips_partitions[2].offset + ifxmips_partitions[2].size;
- ifxmips_partitions[3].size = ((ifxmips_mtd->size >> 20) * 1024 * 1024) - ifxmips_partitions[3].offset;
- if(ifxmips_has_brn_block())
- {
- ifxmips_partitions[3].size -= ifxmips_mtd->erasesize;
- ifxmips_partitions[4].offset = ifxmips_mtd->size - ifxmips_mtd->erasesize;
- ifxmips_partitions[4].size = ifxmips_mtd->erasesize;
- add_mtd_partitions(ifxmips_mtd, parts, 5);
- } else {
- add_mtd_partitions(ifxmips_mtd, parts, 4);
+ /* dynamic size detection only if rootfs-part follows kernel-part */
+ if (kernel_part+1 == rootfs_part) {
+ uimage_size = find_uImage_size(parts[kernel_part].offset);
+
+ if (detect_squashfs_partition(parts[kernel_part].offset + uimage_size)) {
+ printk(KERN_INFO "ifxmips_mtd: found a squashfs following the uImage\n");
+ } else {
+ uimage_size &= ~0xffff;
+ uimage_size += 0x10000;
+ }
+
+ parts[kernel_part].size = uimage_size;
+ parts[rootfs_part].offset = parts[kernel_part].offset + parts[kernel_part].size;
+ parts[rootfs_part].size = ((ifxmips_mtd->size >> 20) * 1024 * 1024) - parts[rootfs_part].offset;
+
+ ifxmips_meta_partition.offset = parts[kernel_part].offset;
+ ifxmips_meta_partition.size = parts[kernel_part].size + parts[rootfs_part].size;
}
- printk(KERN_INFO "ifxmips_mtd: added ifxmips flash with %dMB\n", ifxmips_mtd->size >> 20);
+ if (err <= 0) {
+ if (ifxmips_has_brn_block()) {
+ parts[4].size -= ifxmips_mtd->erasesize;
+ parts[5].offset = ifxmips_mtd->size - ifxmips_mtd->erasesize;
+ parts[5].size = ifxmips_mtd->erasesize;
+ } else {
+ num_parts--;
+ }
+ }
+
+ add_mtd_partitions(ifxmips_mtd, parts, num_parts);
+ add_mtd_partitions(ifxmips_mtd, &ifxmips_meta_partition, 1);
+
+ printk(KERN_INFO "ifxmips_mtd: added %s flash with %dMB\n",
+ ifxmips_map.name, ifxmips_mtd->size >> 20);
return 0;
}
-static struct
-platform_driver ifxmips_mtd_driver = {
+static struct platform_driver ifxmips_mtd_driver = {
.probe = ifxmips_mtd_probe,
.driver = {
.name = "ifxmips_mtd",
},
};
-int __init
-init_ifxmips_mtd(void)
+int __init init_ifxmips_mtd(void)
{
int ret = platform_driver_register(&ifxmips_mtd_driver);
- if(ret)
+ if (ret)
printk(KERN_INFO "ifxmips_mtd: error registering platfom driver!");
return ret;
}
-static void __exit
-cleanup_ifxmips_mtd(void)
+static void __exit cleanup_ifxmips_mtd(void)
{
platform_driver_unregister(&ifxmips_mtd_driver);
}
projects / openwrt / staging / wigyori.git / blobdiff