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[openwrt.git] / target / linux / ifxmips / files / drivers / mtd / maps / ifxmips.c
diff --git a/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c b/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
index b3692e7..6498d12 100644 (file)
--- a/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
+++ b/target/linux/ifxmips/files/drivers/mtd/maps/ifxmips.c
@@ -3,7 +3,7 @@
  * 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.
  * 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
  * 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
@@ -20,138 +20,156 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
 #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/mtd/partitions.h>
 #include <linux/mtd/cfi.h>
 #include <linux/init.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/map.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/cfi.h>
+#include <linux/magic.h>
+#include <linux/platform_device.h>
+
 #include <asm/ifxmips/ifxmips.h>
 #include <asm/ifxmips/ifxmips_prom.h>
 #include <asm/ifxmips/ifxmips_ebu.h>
 #include <asm/ifxmips/ifxmips.h>
 #include <asm/ifxmips/ifxmips_prom.h>
 #include <asm/ifxmips/ifxmips_ebu.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,
 };
 
        .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;
 {
        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;
 }
 
        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;
 {
        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);
 }
 
        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);
 {
        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);
 }
 
                *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;
        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);
 }
 
                *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;
        unsigned long temp;
+       ifxmips_copy_from(&ifxmips_map, &magic, start_offset, 4);
+       if (le32_to_cpu(magic) != 0x56190527) {
+               printk(KERN_INFO "ifxmips_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", le32_to_cpu(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;
 }
 
        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);
        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;
 }
 
                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);
        unsigned long temp;
        ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 4);
-       return (temp == SQUASHFS_MAGIC);
+       return le32_to_cpu(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;
 {
        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_w32(0x1d7ff, IFXMIPS_EBU_BUSCON0);
 
@@ -163,51 +181,74 @@ ifxmips_mtd_probe(struct platform_device *dev)
        ifxmips_map.size = dev->resource->end - ifxmips_map.phys + 1;
        ifxmips_map.virt = ioremap_nocache(ifxmips_map.phys, ifxmips_map.size);
 
        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);
                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;
                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 {
        } 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[3].size -= ifxmips_mtd->erasesize;
+                       parts[4].offset = ifxmips_mtd->size - ifxmips_mtd->erasesize;
+                       parts[4].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;
 }
 
        return 0;
 }
 
-static struct
-platform_driver ifxmips_mtd_driver = {
+static struct platform_driver ifxmips_mtd_driver = {
        .probe = ifxmips_mtd_probe,
        .driver = {
                .name = "ifxmips_mtd",
        .probe = ifxmips_mtd_probe,
        .driver = {
                .name = "ifxmips_mtd",
@@ -215,17 +256,15 @@ platform_driver ifxmips_mtd_driver = {
        },
 };
 
        },
 };
 
-int __init
-init_ifxmips_mtd(void)
+int __init init_ifxmips_mtd(void)
 {
        int ret = platform_driver_register(&ifxmips_mtd_driver);
 {
        int ret = platform_driver_register(&ifxmips_mtd_driver);
-       if(ret)
+       if (ret)
                printk(KERN_INFO "ifxmips_mtd: error registering platfom driver!");
        return 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);
 }
 {
        platform_driver_unregister(&ifxmips_mtd_driver);
 }
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