/*
- * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
+ * Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
+ * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org>
+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.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.
+ * original functions for finding root filesystem from Mike Baker
*
- * 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.
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * Copyright 2004, Broadcom Corporation
+ * All Rights Reserved.
+ *
+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
+ *
+ * Flash mapping for adm8668 boards
*
- * 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/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
-#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
+#include <linux/slab.h>
+#ifdef CONFIG_MTD_PARTITIONS
#include <linux/mtd/partitions.h>
+#endif
+#include <linux/crc32.h>
#include <linux/magic.h>
#include <asm/io.h>
-#define FLASH_SIZE 0x800000
-#define FLASH_PHYS_ADDR 0x10000000
+#define WINDOW_ADDR 0x10000000
+#define WINDOW_SIZE 0x800000
+#define BANKWIDTH 2
+
+/* first a little bit about the headers i need.. */
/* just interested in part of the full struct */
struct squashfs_super_block {
- __le32 s_magic;
- __le32 pad0[9]; /* it's not really padding */
- __le64 bytes_used;
+ __le32 s_magic;
+ __le32 pad0[9]; /* it's not really padding */
+ __le64 bytes_used;
};
-static struct mtd_info *mymtd;
+#define IH_MAGIC 0x56190527 /* Image Magic Number */
+struct uboot_header {
+ uint32_t ih_magic; /* Image Header Magic Number */
+ uint32_t ih_hcrc; /* Image Header CRC Checksum */
+ uint32_t ih_time; /* Image Creation Timestamp */
+ uint32_t ih_size; /* Image Data Size */
+ uint32_t ih_load; /* Data Load Address */
+ uint32_t ih_ep; /* Entry Point Address */
+ uint32_t ih_dcrc; /* Image Data CRC Checksum */
+ uint8_t ih_os; /* Operating System */
+ uint8_t ih_arch; /* CPU architecture */
+ uint8_t ih_type; /* Image Type */
+ uint8_t ih_comp; /* Compression Type */
+ char ih_name[32]; /* image name */
+};
-static struct map_info nor_map = {
- name: "adm8668-nor",
- size: FLASH_SIZE,
- phys: FLASH_PHYS_ADDR,
- bankwidth: 2,
+/************************************************/
+
+static struct mtd_info *adm8668_mtd;
+
+struct map_info adm8668_map = {
+ name: "adm8668-nor",
+ size: WINDOW_SIZE,
+ phys: WINDOW_ADDR,
+ bankwidth: BANKWIDTH,
};
-static struct mtd_partition nor_parts[] = {
- { name: "linux", offset: 0x40000, size: FLASH_SIZE - 0x40000, },
- { name: "rootfs", offset: 0x200000, size: 0x400000, },
+#ifdef CONFIG_MTD_PARTITIONS
+
+/*
+ * Copied from mtdblock.c
+ *
+ * Cache stuff...
+ *
+ * Since typical flash erasable sectors are much larger than what Linux's
+ * buffer cache can handle, we must implement read-modify-write on flash
+ * sectors for each block write requests. To avoid over-erasing flash sectors
+ * and to speed things up, we locally cache a whole flash sector while it is
+ * being written to until a different sector is required.
+ */
+
+static void erase_callback(struct erase_info *done)
+{
+ wait_queue_head_t *wait_q = (wait_queue_head_t *)done->priv;
+ wake_up(wait_q);
+}
+
+static int erase_write (struct mtd_info *mtd, unsigned long pos,
+ int len, const char *buf)
+{
+ struct erase_info erase;
+ DECLARE_WAITQUEUE(wait, current);
+ wait_queue_head_t wait_q;
+ size_t retlen;
+ int ret;
+
+ /*
+ * First, let's erase the flash block.
+ */
+
+ init_waitqueue_head(&wait_q);
+ erase.mtd = mtd;
+ erase.callback = erase_callback;
+ erase.addr = pos;
+ erase.len = len;
+ erase.priv = (u_long)&wait_q;
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&wait_q, &wait);
+
+ ret = mtd->erase(mtd, &erase);
+ if (ret) {
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&wait_q, &wait);
+ printk (KERN_WARNING "erase of region [0x%lx, 0x%x] "
+ "on \"%s\" failed\n",
+ pos, len, mtd->name);
+ return ret;
+ }
+
+ schedule(); /* Wait for erase to finish. */
+ remove_wait_queue(&wait_q, &wait);
+
+ /*
+ * Next, write data to flash.
+ */
+
+ ret = mtd->write (mtd, pos, len, &retlen, buf);
+ if (ret)
+ return ret;
+ if (retlen != len)
+ return -EIO;
+ return 0;
+}
+
+/* decent defaults in case... shrug */
+static struct mtd_partition adm8668_parts[] = {
+ { name: "linux", offset: 0x40000, size: WINDOW_SIZE-0x40000, },
+ { name: "rootfs", offset: 0xe0000, size: 0x140000, },
+ { name: "uboot_env", offset: 0x20000, size: 0x20000, },
{ name: NULL, },
};
-int __init init_mtd_partitions(struct mtd_info *mtd, size_t size)
+/* in case i wanna change stuff later, and to clarify the math section... */
+#define PART_LINUX 0
+#define PART_ROOTFS 1
+#define NR_PARTS 3
+
+static int __init
+init_mtd_partitions(struct mtd_info *mtd, size_t size)
{
- int blocksize, off;
- size_t len;
- struct squashfs_super_block hdr;
+ struct uboot_header uhdr;
+ int off, blocksize;
+ size_t len, linux_len;
+ struct squashfs_super_block shdr;
blocksize = mtd->erasesize;
if (blocksize < 0x10000)
blocksize = 0x10000;
- memset(&hdr, 0xe5, sizeof(hdr));
- /* find and size squashfs */
- for (off = (128*1024); off < size; off += blocksize) {
- if (mtd->read(mtd, off, sizeof(hdr), &len, (char *)&hdr) ||
- len != sizeof(hdr))
+ /* now find squashfs */
+ memset(&shdr, 0xe5, sizeof(shdr));
+ for (off = adm8668_parts[PART_LINUX].offset; off < size; off += blocksize) {
+ /*
+ * Read into buffer
+ */
+ if (mtd->read(mtd, off, sizeof(shdr), &len, (char *)&shdr) ||
+ len != sizeof(shdr))
continue;
- if (hdr.s_magic == SQUASHFS_MAGIC) {
- printk(KERN_INFO "%s: Filesystem type: squashfs, off=%#x size=%#x\n",
- mtd->name, off, (unsigned int)hdr.bytes_used);
- /* Update the squashfs start address only! */
- nor_parts[1].offset = off;
- nor_parts[1].size = FLASH_SIZE - off;
- return 2;
+ if (shdr.s_magic == SQUASHFS_MAGIC) {
+ uint32_t fs_size = (uint32_t)shdr.bytes_used;
+
+ printk(KERN_INFO "%s: Filesystem type: squashfs, size=%dkB\n",
+ mtd->name, fs_size>>10);
+
+ /* Update rootfs based on the superblock info, and
+ * stretch to end of MTD. rootfs_split will split it */
+ adm8668_parts[PART_ROOTFS].offset = off;
+ adm8668_parts[PART_ROOTFS].size = mtd->size -
+ adm8668_parts[PART_ROOTFS].offset;
+
+ /* kernel ends where rootfs starts
+ * but we'll keep it full-length for upgrades */
+ linux_len = adm8668_parts[PART_LINUX+1].offset -
+ adm8668_parts[PART_LINUX].offset;
+#if 1
+ adm8668_parts[PART_LINUX].size = mtd->size -
+ adm8668_parts[PART_LINUX].offset;
+#else
+ adm8668_parts[PART_LINUX].size = linux_len;
+#endif
+ goto found;
+ }
+ }
+
+ printk(KERN_NOTICE
+ "%s: Couldn't find root filesystem\n",
+ mtd->name);
+ return NR_PARTS;
+
+ found:
+ if (mtd->read(mtd, adm8668_parts[PART_LINUX].offset, sizeof(uhdr), &len, (char *)&uhdr) ||
+ len != sizeof(uhdr))
+ return NR_PARTS;
+
+ /* that's odd. how'd ya boot it then */
+ if (uhdr.ih_magic != IH_MAGIC)
+ return NR_PARTS;
+
+ if (be32_to_cpu(uhdr.ih_size) != (linux_len - sizeof(uhdr))) {
+ unsigned char *block, *data = (unsigned char *)(WINDOW_ADDR | (adm8668_parts[PART_LINUX].offset + sizeof(struct uboot_header)) | 0xA0000000);
+
+ printk(KERN_NOTICE "Updating U-boot image:\n");
+ printk(KERN_NOTICE " old: [size: %8d crc32: 0x%08x]\n",
+ be32_to_cpu(uhdr.ih_size), be32_to_cpu(uhdr.ih_dcrc));
+
+ /* Update the data length & crc32 */
+ uhdr.ih_size = cpu_to_be32(linux_len - sizeof(uhdr));
+ uhdr.ih_dcrc = crc32_le(~0, data, linux_len - sizeof(uhdr)) ^ (~0);
+ uhdr.ih_dcrc = cpu_to_be32(uhdr.ih_dcrc);
+
+ printk(KERN_NOTICE " new: [size: %8d crc32: 0x%08x]\n",
+ be32_to_cpu(uhdr.ih_size), be32_to_cpu(uhdr.ih_dcrc));
+
+ /* update header's crc... */
+ uhdr.ih_hcrc = 0;
+ uhdr.ih_hcrc = crc32_le(~0, (unsigned char *)&uhdr,
+ sizeof(uhdr)) ^ (~0);
+ uhdr.ih_hcrc = cpu_to_be32(uhdr.ih_hcrc);
+
+ /* read first eraseblock from the image */
+ block = kmalloc(mtd->erasesize, GFP_KERNEL);
+ if (mtd->read(mtd, adm8668_parts[PART_LINUX].offset, mtd->erasesize, &len, block) || len != mtd->erasesize) {
+ printk("Error copying first eraseblock\n");
+ return 0;
}
+
+ /* Write updated header to the flash */
+ memcpy(block, &uhdr, sizeof(uhdr));
+ if (mtd->unlock)
+ mtd->unlock(mtd, off, mtd->erasesize);
+ erase_write(mtd, adm8668_parts[PART_LINUX].offset, mtd->erasesize, block);
+ if (mtd->sync)
+ mtd->sync(mtd);
+ kfree(block);
+ printk(KERN_NOTICE "Done\n");
}
- return 2;
+
+ return NR_PARTS;
}
-int __init init_nor(void)
+#endif
+
+
+int __init init_adm8668_map(void)
{
- int nr_parts;
+#ifdef CONFIG_MTD_PARTITIONS
+ int nr_parts, ret;
+#endif
- printk(KERN_NOTICE "ADM8668 NOR flash device: %#x at %#x\n",
- FLASH_SIZE, FLASH_PHYS_ADDR);
+ adm8668_map.virt = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE);
- nor_map.virt = ioremap(FLASH_PHYS_ADDR, FLASH_SIZE);
- if (!nor_map.virt) {
- printk("Failed to ioremap\n");
+ if (!adm8668_map.virt) {
+ printk(KERN_ERR "Failed to ioremap\n");
return -EIO;
}
- simple_map_init(&nor_map);
- mymtd = do_map_probe("cfi_probe", &nor_map);
- if (!mymtd) {
- iounmap((void *)nor_map.virt);
+ simple_map_init(&adm8668_map);
+ if (!(adm8668_mtd = do_map_probe("cfi_probe", &adm8668_map))) {
+ printk(KERN_ERR "cfi_probe failed\n");
+ iounmap((void *)adm8668_map.virt);
return -ENXIO;
}
- mymtd->owner = THIS_MODULE;
- nr_parts = init_mtd_partitions(mymtd, mymtd->size);
- add_mtd_partitions(mymtd, nor_parts, nr_parts);
+
+ adm8668_mtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+ nr_parts = init_mtd_partitions(adm8668_mtd, adm8668_mtd->size);
+ ret = add_mtd_partitions(adm8668_mtd, adm8668_parts, nr_parts);
+ if (ret) {
+ printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
+ goto fail;
+ }
+#endif
return 0;
+
+ fail:
+ if (adm8668_mtd)
+ map_destroy(adm8668_mtd);
+ if (adm8668_map.virt)
+ iounmap((void *) adm8668_map.virt);
+ adm8668_map.virt = 0;
+ return ret;
}
-static void __exit cleanup_nor(void)
+void __exit cleanup_adm8668_map(void)
{
- if (mymtd) {
- del_mtd_partitions(mymtd);
- map_destroy(mymtd);
- }
- if (nor_map.virt) {
- iounmap((void *)nor_map.virt);
- nor_map.virt = 0;
- }
+#ifdef CONFIG_MTD_PARTITIONS
+ del_mtd_partitions(adm8668_mtd);
+#endif
+ map_destroy(adm8668_mtd);
+ iounmap((void *) adm8668_map.virt);
+ adm8668_map.virt = 0;
}
-module_init(init_nor);
-module_exit(cleanup_nor);
+module_init(init_adm8668_map);
+module_exit(cleanup_adm8668_map);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Scott Nicholas <neutronscott@scottn.us>");
projects / openwrt / staging / xback.git / commitdiff