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348 lines
10 KiB
Diff
348 lines
10 KiB
Diff
diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c
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--- linux-2.6.15-rc5/drivers/mtd/maps/bcm47xx-flash.c 1970-01-01 01:00:00.000000000 +0100
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+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/bcm47xx-flash.c 2005-12-19 00:33:31.276241000 +0100
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@@ -0,0 +1,316 @@
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+/*
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+ * Copyright (C) 2004 Florian Schirmer (jolt@tuxbox.org)
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+ * Copyright (C) 2005 Waldemar Brodkorb <wbx@openwrt.org>
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+ *
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+ * original functions for finding root filesystem from Mike Baker
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License as published by the
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+ * Free Software Foundation; either version 2 of the License, or (at your
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+ * option) any later version.
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+ *
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+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ * You should have received a copy of the GNU General Public License along
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+ * with this program; if not, write to the Free Software Foundation, Inc.,
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+ * 675 Mass Ave, Cambridge, MA 02139, USA.
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+ *
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+ * Copyright 2001-2003, Broadcom Corporation
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+ * All Rights Reserved.
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+ *
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+ * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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+ * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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+ * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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+ * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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+ *
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+ * Flash mapping for BCM947XX boards
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+ */
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+
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+#include <linux/init.h>
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+#include <linux/module.h>
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+#include <linux/types.h>
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+#include <linux/kernel.h>
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+#include <asm/io.h>
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+#include <linux/mtd/mtd.h>
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+#include <linux/mtd/map.h>
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+#ifdef CONFIG_MTD_PARTITIONS
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+#include <linux/mtd/partitions.h>
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+#endif
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+#include <linux/config.h>
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+
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+#include <trxhdr.h>
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+
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+#define WINDOW_ADDR 0x1c000000
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+#define WINDOW_SIZE (0x400000*2)
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+#define BUSWIDTH 2
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+
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+static struct mtd_info *bcm947xx_mtd;
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+
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+static void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
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+{
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+#define MIPS_MEMCPY_ALIGN 4
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+ map_word ret;
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+ ssize_t transfer;
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+ ssize_t done = 0;
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+ if ((len >= MIPS_MEMCPY_ALIGN) && (!(from & (MIPS_MEMCPY_ALIGN - 1))) && (!(((unsigned int)to & (MIPS_MEMCPY_ALIGN - 1))))) {
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+ done = len & ~(MIPS_MEMCPY_ALIGN - 1);
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+ memcpy_fromio(to, map->virt + from, done);
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+ }
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+ while (done < len) {
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+ ret = map->read(map, from + done);
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+ transfer = len - done;
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+ if (transfer > map->bankwidth)
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+ transfer = map->bankwidth;
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+ memcpy((void *)((unsigned long)to + done), &ret.x[0], transfer);
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+ done += transfer;
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+ }
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+}
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+
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+static struct map_info bcm947xx_map = {
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+ name: "Physically mapped flash",
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+ size: WINDOW_SIZE,
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+ bankwidth: BUSWIDTH,
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+ phys: WINDOW_ADDR,
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+};
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+
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+#ifdef CONFIG_MTD_PARTITIONS
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+
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+static struct mtd_partition bcm947xx_parts[] = {
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+ { name: "cfe", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
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+ { name: "linux", offset: 0, size: 0, },
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+ { name: "rootfs", offset: 0, size: 0, },
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+ { name: "nvram", offset: 0, size: 0, },
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+ { name: "OpenWrt", offset: 0, size: 0, },
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+ { name: NULL, },
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+};
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+
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+static int __init
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+find_cfe_size(struct mtd_info *mtd, size_t size)
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+{
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+ struct trx_header *trx;
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+ unsigned char buf[512];
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+ int off;
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+ size_t len;
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+ int cfe_size_flag;
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+
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+ trx = (struct trx_header *) buf;
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+
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+ cfe_size_flag=0;
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+
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+ for (off = (256*1024); off < size; off += mtd->erasesize) {
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+ memset(buf, 0xe5, sizeof(buf));
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+
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+ /*
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+ * Read into buffer
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+ */
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+ if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
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+ len != sizeof(buf))
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+ continue;
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+
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+ /* found a TRX header */
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+ if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
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+ goto done;
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+ }
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+ cfe_size_flag += 1;
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+ }
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+
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+ printk(KERN_NOTICE
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+ "%s: Couldn't find bootloader size\n",
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+ mtd->name);
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+ return -1;
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+
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+ done:
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+ printk(KERN_NOTICE "bootloader size flag: %d\n", cfe_size_flag);
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+ return cfe_size_flag;
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+
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+}
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+
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+static int __init
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+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
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+{
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+ struct trx_header *trx;
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+ unsigned char buf[512];
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+ int off;
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+ size_t len;
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+
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+ trx = (struct trx_header *) buf;
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+
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+ for (off = (256*1024); off < size; off += mtd->erasesize) {
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+ memset(buf, 0xe5, sizeof(buf));
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+
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+ /*
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+ * Read into buffer
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+ */
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+ if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
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+ len != sizeof(buf))
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+ continue;
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+
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+ /* found a TRX header */
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+ if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
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+ part->offset = le32_to_cpu(trx->offsets[2]) ? :
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+ le32_to_cpu(trx->offsets[1]);
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+ part->size = le32_to_cpu(trx->len);
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+
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+ part->size -= part->offset;
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+ part->offset += off;
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+
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+ goto done;
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+ }
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+ }
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+
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+ printk(KERN_NOTICE
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+ "%s: Couldn't find root filesystem\n",
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+ mtd->name);
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+ return -1;
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+
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+ done:
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+ return part->size;
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+}
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+
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+struct mtd_partition * __init
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+init_mtd_partitions(struct mtd_info *mtd, size_t size)
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+{
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+
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+ int cfe_size_flag;
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+
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+ /* if cfe_size_flag=0, cfe size is 256 kb, else 384 kb */
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+ cfe_size_flag = find_cfe_size(mtd, size);
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+
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+ /* boot loader */
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+ bcm947xx_parts[0].offset = 0;
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+ if (cfe_size_flag == 0) {
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+ bcm947xx_parts[0].size = 1024*256;
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+ } else {
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+ /* netgear wgt634u has 384 kb bootloader */
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+ bcm947xx_parts[0].size = 1024*384;
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+ }
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+
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+ /* nvram */
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+ if (cfe_size_flag == 0) {
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+ bcm947xx_parts[3].offset = size - mtd->erasesize;
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+ } else {
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+ /* nvram (old 128kb config partition on netgear wgt634u) */
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+ bcm947xx_parts[3].offset = bcm947xx_parts[0].size;
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+ }
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+ bcm947xx_parts[3].size = mtd->erasesize;
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+
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+ /* linux (kernel and rootfs) */
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+ if (cfe_size_flag == 0) {
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+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
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+ bcm947xx_parts[1].size = bcm947xx_parts[3].offset -
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+ bcm947xx_parts[1].offset;
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+ } else {
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+ /* do not count the elf loader, which is on one block */
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+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size +
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+ bcm947xx_parts[3].size + mtd->erasesize;
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+ bcm947xx_parts[1].size = size -
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+ bcm947xx_parts[0].size -
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+ (2*bcm947xx_parts[3].size) -
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+ mtd->erasesize;
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+ }
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+
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+ /* find and size rootfs */
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+ if (find_root(mtd,size,&bcm947xx_parts[2])==0) {
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+ /* entirely jffs2 */
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+ bcm947xx_parts[4].name = NULL;
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+ bcm947xx_parts[2].size = size - bcm947xx_parts[2].offset -
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+ bcm947xx_parts[3].size;
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+ } else {
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+ /* legacy setup */
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+ /* calculate leftover flash, and assign it to the jffs2 partition */
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+ if (cfe_size_flag == 0) {
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+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
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+ bcm947xx_parts[2].size;
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+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
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+ bcm947xx_parts[4].offset += mtd->erasesize -
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+ (bcm947xx_parts[4].offset % mtd->erasesize);
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+ }
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+ bcm947xx_parts[4].size = bcm947xx_parts[3].offset -
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+ bcm947xx_parts[4].offset;
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+ } else {
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+ bcm947xx_parts[4].offset = bcm947xx_parts[2].offset +
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+ bcm947xx_parts[2].size;
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+ if ((bcm947xx_parts[4].offset % mtd->erasesize) > 0) {
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+ bcm947xx_parts[4].offset += mtd->erasesize -
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+ (bcm947xx_parts[4].offset % mtd->erasesize);
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+ }
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+ bcm947xx_parts[4].size = size - bcm947xx_parts[3].size -
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+ bcm947xx_parts[4].offset;
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+ }
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+ }
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+
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+ return bcm947xx_parts;
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+}
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+#endif
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+
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+int __init init_bcm947xx_map(void)
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+{
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+ size_t size;
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+ int ret = 0;
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+#ifdef CONFIG_MTD_PARTITIONS
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+ struct mtd_partition *parts;
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+ int i;
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+#endif
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+
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+ bcm947xx_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
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+
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+ if (!bcm947xx_map.virt) {
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+ printk("Failed to ioremap\n");
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+ return -EIO;
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+ }
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+ simple_map_init(&bcm947xx_map);
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+
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+ bcm947xx_map.copy_from = bcm947xx_map_copy_from;
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+
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+ if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
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+ printk("Failed to do_map_probe\n");
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+ iounmap((void *)bcm947xx_map.virt);
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+ return -ENXIO;
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+ }
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+
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+ bcm947xx_mtd->owner = THIS_MODULE;
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+
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+ size = bcm947xx_mtd->size;
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+
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+ printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
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+
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+#ifdef CONFIG_MTD_PARTITIONS
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+ parts = init_mtd_partitions(bcm947xx_mtd, size);
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+ for (i = 0; parts[i].name; i++);
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+ ret = add_mtd_partitions(bcm947xx_mtd, parts, i);
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+ if (ret) {
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+ printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
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+ goto fail;
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+ }
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+#endif
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+ return 0;
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+
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+ fail:
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+ if (bcm947xx_mtd)
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+ map_destroy(bcm947xx_mtd);
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+ if (bcm947xx_map.virt)
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+ iounmap((void *)bcm947xx_map.virt);
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+ bcm947xx_map.virt = 0;
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+ return ret;
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+}
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+
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+void __exit cleanup_bcm947xx_map(void)
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+{
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+#ifdef CONFIG_MTD_PARTITIONS
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+ del_mtd_partitions(bcm947xx_mtd);
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+#endif
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+ map_destroy(bcm947xx_mtd);
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+ iounmap((void *)bcm947xx_map.virt);
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+}
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+
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+module_init(init_bcm947xx_map);
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+module_exit(cleanup_bcm947xx_map);
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diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/Kconfig linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig
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--- linux-2.6.15-rc5/drivers/mtd/maps/Kconfig 2005-12-04 06:10:42.000000000 +0100
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+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Kconfig 2005-12-18 19:36:11.555087000 +0100
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@@ -299,6 +299,12 @@
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Mapping for the Flaga digital module. If you don't have one, ignore
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this setting.
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+config MTD_BCM47XX
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+ tristate "BCM47xx flash device"
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+ depends on MIPS && MTD_CFI && BCM947XX
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+ help
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+ Support for the flash chips on the BCM947xx board.
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+
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config MTD_BEECH
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tristate "CFI Flash device mapped on IBM 405LP Beech"
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depends on MTD_CFI && BEECH
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diff -Nur linux-2.6.15-rc5/drivers/mtd/maps/Makefile linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile
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--- linux-2.6.15-rc5/drivers/mtd/maps/Makefile 2005-12-04 06:10:42.000000000 +0100
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+++ linux-2.6.15-rc5-flash/drivers/mtd/maps/Makefile 2005-12-18 19:36:11.555087000 +0100
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@@ -31,6 +31,7 @@
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obj-$(CONFIG_MTD_PCMCIA) += pcmciamtd.o
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obj-$(CONFIG_MTD_RPXLITE) += rpxlite.o
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obj-$(CONFIG_MTD_TQM8XXL) += tqm8xxl.o
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+obj-$(CONFIG_MTD_BCM47XX) += bcm47xx-flash.o
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obj-$(CONFIG_MTD_SA1100) += sa1100-flash.o
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obj-$(CONFIG_MTD_IPAQ) += ipaq-flash.o
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obj-$(CONFIG_MTD_SBC_GXX) += sbc_gxx.o
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