strip the kernel version suffix from target directories, except for brcm-2.4 (the...

[openwrt/svn-archive/archive.git] / target / linux / at91 / files / drivers / mtd / at91part.c

diff --git a/target/linux/at91/files/drivers/mtd/at91part.c b/target/linux/at91/files/drivers/mtd/at91part.c
new file mode 100644 (file)
index 0000000..bfa9590
--- /dev/null
+++ b/target/linux/at91/files/drivers/mtd/at91part.c
@@ -0,0 +1,121 @@
+/*
+ * $Id: at91part.c 6948 2007-04-15 04:01:45Z hcg $
+ * 
+ * Copyright (C) 2007 OpenWrt.org
+ * 
+ * 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
+ *
+ * Atmel AT91 flash partition table. (Modified by Hamish Guthrie).
+ * Based on ar7 map by Felix Fietkau.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/bootmem.h>
+#include <linux/squashfs_fs.h>
+
+static struct mtd_partition at91_parts[6];
+
+static int create_mtd_partitions(struct mtd_info *master, 
+                                struct mtd_partition **pparts, 
+                                unsigned long origin)
+{
+       unsigned int offset, len;
+       unsigned int pre_size = 0x42000, root_max = 0x362400;
+       unsigned char buf[512];
+       struct squashfs_super_block *sb = (struct squashfs_super_block *) buf;
+
+       printk("Parsing AT91 partition map...\n");
+
+       at91_parts[0].name = "loaders";
+       at91_parts[0].offset = 0;
+       at91_parts[0].size = 0x21000;
+       at91_parts[0].mask_flags = MTD_WRITEABLE;
+
+       at91_parts[1].name = "ubparams";
+       at91_parts[1].offset = 0x21000;
+       at91_parts[1].size = 0x8400;
+       at91_parts[1].mask_flags = 0;
+
+       at91_parts[2].name = "kernel";
+       at91_parts[2].offset = pre_size;
+       at91_parts[2].size = 0;
+       at91_parts[2].mask_flags = 0;
+
+       at91_parts[3].name = "rootfs";
+       at91_parts[3].offset = 0;
+       at91_parts[3].size = 0;
+       at91_parts[3].mask_flags = 0;
+
+       for(offset = pre_size; offset < root_max; offset += master->erasesize) {
+
+               memset(&buf, 0xe5, sizeof(buf));
+
+               if (master->read(master, offset, sizeof(buf), &len, buf) || len != sizeof(buf))
+                       break;
+
+               if (*((__u32 *) buf) == SQUASHFS_MAGIC) {
+                       printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n",
+                                                       master->name, (u32) sb->bytes_used);
+
+                       at91_parts[3].size = sb->bytes_used;
+                       at91_parts[3].offset = offset;
+                       len = at91_parts[3].offset + at91_parts[3].size;
+                       len = ((len / (master->erasesize * 8)) + 1) * master->erasesize * 8;
+                       at91_parts[3].size = len - at91_parts[3].offset;
+                       at91_parts[2].size = offset - at91_parts[2].offset;
+                       break;
+                       }
+               }
+
+       if (at91_parts[3].size == 0) {
+               printk(KERN_NOTICE "%s: Couldn't find root filesystem\n", master->name);
+               return -1;
+               }
+
+       at91_parts[4].name = "rootfs_data";
+       at91_parts[4].offset = root_max;
+       at91_parts[4].size = master->size - root_max;
+       at91_parts[4].mask_flags = 0;
+
+       at91_parts[5].name = "complete";
+       at91_parts[5].offset = 0;
+       at91_parts[5].size = master->size;
+       at91_parts[5].mask_flags = 0;
+
+       *pparts = at91_parts;
+       return 6;
+}
+
+static struct mtd_part_parser at91_parser = {
+       .owner = THIS_MODULE,
+       .parse_fn = create_mtd_partitions,
+       .name = "at91part",
+};
+
+static int __init at91_parser_init(void)
+{
+       return register_mtd_parser(&at91_parser);
+}
+
+module_init(at91_parser_init);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Felix Fietkau, Eugene Konev, Hamish Guthrie");
+MODULE_DESCRIPTION("MTD partitioning for Atmel at91");