X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/74975289a3766867f9d3a513ebd1cbd26671574d..162d022cff3c507cdf3c6d21e5ce5eedaeb46236:/target/linux/brcm47xx-2.6/patches/110-flash_map.patch diff --git a/target/linux/brcm47xx-2.6/patches/110-flash_map.patch b/target/linux/brcm47xx-2.6/patches/110-flash_map.patch index 97a3f4ee8..bf809e70a 100644 --- a/target/linux/brcm47xx-2.6/patches/110-flash_map.patch +++ b/target/linux/brcm47xx-2.6/patches/110-flash_map.patch @@ -1,478 +1,3 @@ -diff -urN linux.old/drivers/mtd/maps/bcm47xx-flash.c linux.dev/drivers/mtd/maps/bcm47xx-flash.c ---- linux.old/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100 -+++ linux.dev/drivers/mtd/maps/bcm47xx-flash.c 2007-01-03 02:26:02.000000000 +0100 -@@ -0,0 +1,471 @@ -+/* -+ * Copyright (C) 2006 Felix Fietkau -+ * Copyright (C) 2005 Waldemar Brodkorb -+ * 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 2001-2003, 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 BCM947XX boards -+ */ -+ -+#include -+#include -+#include -+#include -+#include -+#include -+#include -+#ifdef CONFIG_MTD_PARTITIONS -+#include -+#endif -+#include -+#include -+#include -+#include -+#include -+ -+ -+#define TRX_MAGIC 0x30524448 /* "HDR0" */ -+#define TRX_VERSION 1 -+#define TRX_MAX_LEN 0x3A0000 -+#define TRX_NO_HEADER 1 /* Do not write TRX header */ -+#define TRX_GZ_FILES 0x2 /* Contains up to TRX_MAX_OFFSET individual gzip files */ -+#define TRX_MAX_OFFSET 3 -+ -+struct trx_header { -+ u32 magic; /* "HDR0" */ -+ u32 len; /* Length of file including header */ -+ u32 crc32; /* 32-bit CRC from flag_version to end of file */ -+ u32 flag_version; /* 0:15 flags, 16:31 version */ -+ u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions from start of header */ -+}; -+ -+#define ROUNDUP(x, y) ((((x)+((y)-1))/(y))*(y)) -+#define NVRAM_SPACE 0x8000 -+#define WINDOW_ADDR 0x1fc00000 -+#define WINDOW_SIZE 0x400000 -+#define BUSWIDTH 2 -+ -+extern struct ssb_bus ssb; -+static struct mtd_info *bcm947xx_mtd; -+ -+static void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len) -+{ -+#define MIPS_MEMCPY_ALIGN 4 -+ map_word ret; -+ ssize_t transfer; -+ ssize_t done = 0; -+ if ((len >= MIPS_MEMCPY_ALIGN) && (!(from & (MIPS_MEMCPY_ALIGN - 1))) && (!(((unsigned int)to & (MIPS_MEMCPY_ALIGN - 1))))) { -+ done = len & ~(MIPS_MEMCPY_ALIGN - 1); -+ memcpy_fromio(to, map->virt + from, done); -+ } -+ while (done < len) { -+ ret = map->read(map, from + done); -+ transfer = len - done; -+ if (transfer > map->bankwidth) -+ transfer = map->bankwidth; -+ memcpy((void *)((unsigned long)to + done), &ret.x[0], transfer); -+ done += transfer; -+ } -+} -+ -+static struct map_info bcm947xx_map = { -+ name: "Physically mapped flash", -+ size: WINDOW_SIZE, -+ bankwidth: BUSWIDTH, -+ phys: WINDOW_ADDR, -+}; -+ -+#ifdef CONFIG_MTD_PARTITIONS -+ -+static struct mtd_partition bcm947xx_parts[] = { -+ { name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, }, -+ { name: "linux", offset: 0, size: 0, }, -+ { name: "rootfs", offset: 0, size: 0, }, -+ { name: "nvram", offset: 0, size: 0, }, -+ { name: "OpenWrt", offset: 0, size: 0, }, -+ { name: NULL, }, -+}; -+ -+static int __init -+find_cfe_size(struct mtd_info *mtd, size_t size) -+{ -+ struct trx_header *trx; -+ unsigned char buf[512]; -+ int off; -+ size_t len; -+ int blocksize; -+ -+ trx = (struct trx_header *) buf; -+ -+ blocksize = mtd->erasesize; -+ if (blocksize < 0x10000) -+ blocksize = 0x10000; -+ -+ for (off = (128*1024); off < size; off += blocksize) { -+ memset(buf, 0xe5, sizeof(buf)); -+ -+ /* -+ * Read into buffer -+ */ -+ if (mtd->read(mtd, off, sizeof(buf), &len, buf) || -+ len != sizeof(buf)) -+ continue; -+ -+ /* found a TRX header */ -+ if (le32_to_cpu(trx->magic) == TRX_MAGIC) { -+ goto found; -+ } -+ } -+ -+ printk(KERN_NOTICE -+ "%s: Couldn't find bootloader size\n", -+ mtd->name); -+ return -1; -+ -+ found: -+ printk(KERN_NOTICE "bootloader size: %d\n", off); -+ return off; -+ -+} -+ -+/* -+ * 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, writhe data to flash. -+ */ -+ -+ ret = mtd->write (mtd, pos, len, &retlen, buf); -+ if (ret) -+ return ret; -+ if (retlen != len) -+ return -EIO; -+ return 0; -+} -+ -+ -+ -+ -+static int __init -+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part) -+{ -+ struct trx_header trx, *trx2; -+ unsigned char buf[512], *block; -+ int off, blocksize; -+ u32 i, crc = ~0; -+ size_t len; -+ struct squashfs_super_block *sb = (struct squashfs_super_block *) buf; -+ -+ blocksize = mtd->erasesize; -+ if (blocksize < 0x10000) -+ blocksize = 0x10000; -+ -+ for (off = (128*1024); off < size; off += blocksize) { -+ memset(&trx, 0xe5, sizeof(trx)); -+ -+ /* -+ * Read into buffer -+ */ -+ if (mtd->read(mtd, off, sizeof(trx), &len, (char *) &trx) || -+ len != sizeof(trx)) -+ continue; -+ -+ /* found a TRX header */ -+ if (le32_to_cpu(trx.magic) == TRX_MAGIC) { -+ part->offset = le32_to_cpu(trx.offsets[2]) ? : -+ le32_to_cpu(trx.offsets[1]); -+ part->size = le32_to_cpu(trx.len); -+ -+ part->size -= part->offset; -+ part->offset += off; -+ -+ goto found; -+ } -+ } -+ -+ printk(KERN_NOTICE -+ "%s: Couldn't find root filesystem\n", -+ mtd->name); -+ return -1; -+ -+ found: -+ if (part->size == 0) -+ return 0; -+ -+ if (mtd->read(mtd, part->offset, sizeof(buf), &len, buf) || len != sizeof(buf)) -+ return 0; -+ -+ if (*((__u32 *) buf) == SQUASHFS_MAGIC) { -+ printk(KERN_INFO "%s: Filesystem type: squashfs, size=0x%x\n", mtd->name, (u32) sb->bytes_used); -+ -+ /* Update the squashfs partition size based on the superblock info */ -+ part->size = sb->bytes_used; -+ len = part->offset + part->size; -+ len += (mtd->erasesize - 1); -+ len &= ~(mtd->erasesize - 1); -+ part->size = len - part->offset; -+ } else if (*((__u16 *) buf) == JFFS2_MAGIC_BITMASK) { -+ printk(KERN_INFO "%s: Filesystem type: jffs2\n", mtd->name); -+ -+ /* Move the squashfs outside of the trx */ -+ part->size = 0; -+ } else { -+ printk(KERN_INFO "%s: Filesystem type: unknown\n", mtd->name); -+ return 0; -+ } -+ -+ if (trx.len != part->offset + part->size - off) { -+ /* Update the trx offsets and length */ -+ trx.len = part->offset + part->size - off; -+ -+ /* Update the trx crc32 */ -+ for (i = (u32) &(((struct trx_header *)NULL)->flag_version); i <= trx.len; i += sizeof(buf)) { -+ if (mtd->read(mtd, off + i, sizeof(buf), &len, buf) || len != sizeof(buf)) -+ return 0; -+ crc = crc32_le(crc, buf, min(sizeof(buf), trx.len - i)); -+ } -+ trx.crc32 = crc; -+ -+ /* read first eraseblock from the trx */ -+ block = kmalloc(mtd->erasesize, GFP_KERNEL); -+ trx2 = (struct trx_header *) block; -+ if (mtd->read(mtd, off, mtd->erasesize, &len, block) || len != mtd->erasesize) { -+ printk("Error accessing the first trx eraseblock\n"); -+ return 0; -+ } -+ -+ printk("Updating TRX offsets and length:\n"); -+ printk("old trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx2->offsets[0], trx2->offsets[1], trx2->offsets[2], trx2->len, trx2->crc32); -+ printk("new trx = [0x%08x, 0x%08x, 0x%08x], len=0x%08x crc32=0x%08x\n", trx.offsets[0], trx.offsets[1], trx.offsets[2], trx.len, trx.crc32); -+ -+ /* Write updated trx header to the flash */ -+ memcpy(block, &trx, sizeof(trx)); -+ if (mtd->unlock) -+ mtd->unlock(mtd, off, mtd->erasesize); -+ erase_write(mtd, off, mtd->erasesize, block); -+ if (mtd->sync) -+ mtd->sync(mtd); -+ kfree(block); -+ printk("Done\n"); -+ } -+ -+ return part->size; -+} -+ -+struct mtd_partition * __init -+init_mtd_partitions(struct mtd_info *mtd, size_t size) -+{ -+ int cfe_size; -+ -+ if ((cfe_size = find_cfe_size(mtd,size)) < 0) -+ return NULL; -+ -+ /* boot loader */ -+ bcm947xx_parts[0].offset = 0; -+ bcm947xx_parts[0].size = cfe_size; -+ -+ /* nvram */ -+ if (cfe_size != 384 * 1024) { -+ bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize); -+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); -+ } else { -+ /* nvram (old 128kb config partition on netgear wgt634u) */ -+ bcm947xx_parts[3].offset = bcm947xx_parts[0].size; -+ bcm947xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize); -+ } -+ -+ /* linux (kernel and rootfs) */ -+ if (cfe_size != 384 * 1024) { -+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size; -+ bcm947xx_parts[1].size = bcm947xx_parts[3].offset - -+ bcm947xx_parts[1].offset; -+ } else { -+ /* do not count the elf loader, which is on one block */ -+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size + -+ bcm947xx_parts[3].size + mtd->erasesize; -+ bcm947xx_parts[1].size = size - -+ bcm947xx_parts[0].size - -+ (2*bcm947xx_parts[3].size) - -+ mtd->erasesize; -+ } -+ -+ /* find and size rootfs */ -+ if (find_root(mtd,size,&bcm947xx_parts[2])==0) { -+ /* entirely jffs2 */ -+ bcm947xx_parts[4].name = NULL; -+ bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset - -+ bcm947xx_parts[3].size; -+ } else { -+ /* legacy setup */ -+ /* calculate leftover flash, and assign it to the jffs2 partition */ -+ if (cfe_size != 384 * 1024) { -+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset + -+ bcm947xx_parts[2].size; -+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) { -+ bcm947xx_parts[4].offset += mtd->erasesize - -+ (bcm947xx_parts[4].offset % mtd->erasesize); -+ } -+ bcm947xx_parts[4].size = bcm947xx_parts[3].offset - -+ bcm947xx_parts[4].offset; -+ } else { -+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset + -+ bcm947xx_parts[2].size; -+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) { -+ bcm947xx_parts[4].offset += mtd->erasesize - -+ (bcm947xx_parts[4].offset % mtd->erasesize); -+ } -+ bcm947xx_parts[4].size = size - bcm947xx_parts[3].size - -+ bcm947xx_parts[4].offset; -+ } -+ } -+ -+ return bcm947xx_parts; -+} -+#endif -+ -+int __init init_bcm947xx_map(void) -+{ -+ struct ssb_mipscore *mcore = &ssb.mipscore; -+ size_t size; -+ int ret = 0; -+#ifdef CONFIG_MTD_PARTITIONS -+ struct mtd_partition *parts; -+ int i; -+#endif -+ u32 window = mcore->flash_window; -+ u32 window_size = mcore->flash_window_size; -+ -+ printk("flash init: 0x%08x 0x%08x\n", window, window_size); -+ bcm947xx_map.virt = ioremap(window, window_size); -+ -+ if (!bcm947xx_map.virt) { -+ printk("Failed to ioremap\n"); -+ return -EIO; -+ } -+ simple_map_init(&bcm947xx_map); -+ -+ bcm947xx_map.copy_from = bcm947xx_map_copy_from; -+ -+ if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) { -+ printk("Failed to do_map_probe\n"); -+ iounmap((void *)bcm947xx_map.virt); -+ return -ENXIO; -+ } -+ -+ bcm947xx_mtd->owner = THIS_MODULE; -+ -+ size = bcm947xx_mtd->size; -+ -+ printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR); -+ -+#ifdef CONFIG_MTD_PARTITIONS -+ parts = init_mtd_partitions(bcm947xx_mtd, size); -+ for (i = 0; parts[i].name; i++); -+ ret = add_mtd_partitions(bcm947xx_mtd, parts, i); -+ if (ret) { -+ printk(KERN_ERR "Flash: add_mtd_partitions failed\n"); -+ goto fail; -+ } -+#endif -+ return 0; -+ -+ fail: -+ if (bcm947xx_mtd) -+ map_destroy(bcm947xx_mtd); -+ if (bcm947xx_map.virt) -+ iounmap((void *)bcm947xx_map.virt); -+ bcm947xx_map.virt = 0; -+ return ret; -+} -+ -+void __exit cleanup_bcm947xx_map(void) -+{ -+#ifdef CONFIG_MTD_PARTITIONS -+ del_mtd_partitions(bcm947xx_mtd); -+#endif -+ map_destroy(bcm947xx_mtd); -+ iounmap((void *)bcm947xx_map.virt); -+} -+ -+module_init(init_bcm947xx_map); -+module_exit(cleanup_bcm947xx_map); diff -urN linux.old/drivers/mtd/maps/Kconfig linux.dev/drivers/mtd/maps/Kconfig --- linux.old/drivers/mtd/maps/Kconfig 2006-12-11 20:32:53.000000000 +0100 +++ linux.dev/drivers/mtd/maps/Kconfig 2007-01-03 02:26:02.000000000 +0100