diff options
Diffstat (limited to 'target/linux/adm8668/files/drivers')
-rw-r--r-- | target/linux/adm8668/files/drivers/mtd/maps/adm8668.c | 334 |
1 files changed, 0 insertions, 334 deletions
diff --git a/target/linux/adm8668/files/drivers/mtd/maps/adm8668.c b/target/linux/adm8668/files/drivers/mtd/maps/adm8668.c deleted file mode 100644 index e360a0d78c..0000000000 --- a/target/linux/adm8668/files/drivers/mtd/maps/adm8668.c +++ /dev/null @@ -1,334 +0,0 @@ -/* - * 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) - * - * original functions for finding root filesystem from Mike Baker - * - * 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 - * - */ - -#include <linux/module.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/wait.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/map.h> -#include <linux/slab.h> -#include <linux/mtd/partitions.h> -#include <linux/crc32.h> -#include <linux/magic.h> -#include <asm/io.h> - -#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; -}; - -#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 mtd_info *adm8668_mtd; - -struct map_info adm8668_map = { - name: "adm8668-nor", - size: WINDOW_SIZE, - phys: WINDOW_ADDR, - bankwidth: BANKWIDTH, -}; - -/* - * 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, }, -}; - -/* 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) -{ - 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; - - /* 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 (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 int offset; - - offset = adm8668_parts[PART_LINUX].offset + - sizeof(struct uboot_header); - data = (unsigned char *)(WINDOW_ADDR | 0xA0000000 | offset); - - 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 NR_PARTS; -} - -int __init init_adm8668_map(void) -{ - int nr_parts, ret; - - adm8668_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE); - - if (!adm8668_map.virt) { - printk(KERN_ERR "Failed to ioremap\n"); - return -EIO; - } - - 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; - } - - adm8668_mtd->owner = THIS_MODULE; - - nr_parts = init_mtd_partitions(adm8668_mtd, adm8668_mtd->size); - ret = mtd_device_register(adm8668_mtd, adm8668_parts, nr_parts); - if (ret) { - printk(KERN_ERR "Flash: mtd_device_register failed\n"); - goto fail; - } - - 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; -} - -void __exit cleanup_adm8668_map(void) -{ - mtd_device_unregister(adm8668_mtd); - map_destroy(adm8668_mtd); - iounmap((void *) adm8668_map.virt); - adm8668_map.virt = 0; -} - -module_init(init_adm8668_map); -module_exit(cleanup_adm8668_map); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Scott Nicholas <neutronscott@scottn.us>"); -MODULE_DESCRIPTION("MTD map driver for ADM8668 NOR Flash"); |