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-rw-r--r--target/linux/brcm47xx/files/arch/mips/bcm47xx/cfe_env.c229
-rw-r--r--target/linux/brcm47xx/files/arch/mips/bcm47xx/include/nvram.h37
-rw-r--r--target/linux/brcm47xx/files/arch/mips/bcm47xx/nvram.c125
-rw-r--r--target/linux/brcm47xx/files/arch/mips/include/asm/mach-bcm47xx/kernel-entry-init.h26
-rw-r--r--target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c440
5 files changed, 857 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/files/arch/mips/bcm47xx/cfe_env.c b/target/linux/brcm47xx/files/arch/mips/bcm47xx/cfe_env.c
new file mode 100644
index 0000000000..c1d5eeef59
--- /dev/null
+++ b/target/linux/brcm47xx/files/arch/mips/bcm47xx/cfe_env.c
@@ -0,0 +1,229 @@
+/*
+ * CFE environment variable access
+ *
+ * Copyright 2001-2003, Broadcom Corporation
+ * Copyright 2006, Felix Fietkau <nbd@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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#define NVRAM_SIZE (0x1ff0)
+static char _nvdata[NVRAM_SIZE];
+static char _valuestr[256];
+
+/*
+ * TLV types. These codes are used in the "type-length-value"
+ * encoding of the items stored in the NVRAM device (flash or EEPROM)
+ *
+ * The layout of the flash/nvram is as follows:
+ *
+ * <type> <length> <data ...> <type> <length> <data ...> <type_end>
+ *
+ * The type code of "ENV_TLV_TYPE_END" marks the end of the list.
+ * The "length" field marks the length of the data section, not
+ * including the type and length fields.
+ *
+ * Environment variables are stored as follows:
+ *
+ * <type_env> <length> <flags> <name> = <value>
+ *
+ * If bit 0 (low bit) is set, the length is an 8-bit value.
+ * If bit 0 (low bit) is clear, the length is a 16-bit value
+ *
+ * Bit 7 set indicates "user" TLVs. In this case, bit 0 still
+ * indicates the size of the length field.
+ *
+ * Flags are from the constants below:
+ *
+ */
+#define ENV_LENGTH_16BITS 0x00 /* for low bit */
+#define ENV_LENGTH_8BITS 0x01
+
+#define ENV_TYPE_USER 0x80
+
+#define ENV_CODE_SYS(n,l) (((n)<<1)|(l))
+#define ENV_CODE_USER(n,l) ((((n)<<1)|(l)) | ENV_TYPE_USER)
+
+/*
+ * The actual TLV types we support
+ */
+
+#define ENV_TLV_TYPE_END 0x00
+#define ENV_TLV_TYPE_ENV ENV_CODE_SYS(0,ENV_LENGTH_8BITS)
+
+/*
+ * Environment variable flags
+ */
+
+#define ENV_FLG_NORMAL 0x00 /* normal read/write */
+#define ENV_FLG_BUILTIN 0x01 /* builtin - not stored in flash */
+#define ENV_FLG_READONLY 0x02 /* read-only - cannot be changed */
+
+#define ENV_FLG_MASK 0xFF /* mask of attributes we keep */
+#define ENV_FLG_ADMIN 0x100 /* lets us internally override permissions */
+
+
+/* *********************************************************************
+ * _nvram_read(buffer,offset,length)
+ *
+ * Read data from the NVRAM device
+ *
+ * Input parameters:
+ * buffer - destination buffer
+ * offset - offset of data to read
+ * length - number of bytes to read
+ *
+ * Return value:
+ * number of bytes read, or <0 if error occured
+ ********************************************************************* */
+static int
+_nvram_read(unsigned char *nv_buf, unsigned char *buffer, int offset, int length)
+{
+ int i;
+ if (offset > NVRAM_SIZE)
+ return -1;
+
+ for ( i = 0; i < length; i++) {
+ buffer[i] = ((volatile unsigned char*)nv_buf)[offset + i];
+ }
+ return length;
+}
+
+
+static char*
+_strnchr(const char *dest,int c,size_t cnt)
+{
+ while (*dest && (cnt > 0)) {
+ if (*dest == c) return (char *) dest;
+ dest++;
+ cnt--;
+ }
+ return NULL;
+}
+
+
+
+/*
+ * Core support API: Externally visible.
+ */
+
+/*
+ * Get the value of an NVRAM variable
+ * @param name name of variable to get
+ * @return value of variable or NULL if undefined
+ */
+
+char*
+cfe_env_get(unsigned char *nv_buf, char* name)
+{
+ int size;
+ unsigned char *buffer;
+ unsigned char *ptr;
+ unsigned char *envval;
+ unsigned int reclen;
+ unsigned int rectype;
+ int offset;
+ int flg;
+
+ if (!strcmp(name, "nvram_type"))
+ return "cfe";
+
+ size = NVRAM_SIZE;
+ buffer = &_nvdata[0];
+
+ ptr = buffer;
+ offset = 0;
+
+ /* Read the record type and length */
+ if (_nvram_read(nv_buf, ptr,offset,1) != 1) {
+ goto error;
+ }
+
+ while ((*ptr != ENV_TLV_TYPE_END) && (size > 1)) {
+
+ /* Adjust pointer for TLV type */
+ rectype = *(ptr);
+ offset++;
+ size--;
+
+ /*
+ * Read the length. It can be either 1 or 2 bytes
+ * depending on the code
+ */
+ if (rectype & ENV_LENGTH_8BITS) {
+ /* Read the record type and length - 8 bits */
+ if (_nvram_read(nv_buf, ptr,offset,1) != 1) {
+ goto error;
+ }
+ reclen = *(ptr);
+ size--;
+ offset++;
+ }
+ else {
+ /* Read the record type and length - 16 bits, MSB first */
+ if (_nvram_read(nv_buf, ptr,offset,2) != 2) {
+ goto error;
+ }
+ reclen = (((unsigned int) *(ptr)) << 8) + (unsigned int) *(ptr+1);
+ size -= 2;
+ offset += 2;
+ }
+
+ if (reclen > size)
+ break; /* should not happen, bad NVRAM */
+
+ switch (rectype) {
+ case ENV_TLV_TYPE_ENV:
+ /* Read the TLV data */
+ if (_nvram_read(nv_buf, ptr,offset,reclen) != reclen)
+ goto error;
+ flg = *ptr++;
+ envval = (unsigned char *) _strnchr(ptr,'=',(reclen-1));
+ if (envval) {
+ *envval++ = '\0';
+ memcpy(_valuestr,envval,(reclen-1)-(envval-ptr));
+ _valuestr[(reclen-1)-(envval-ptr)] = '\0';
+#if 0
+ printk(KERN_INFO "NVRAM:%s=%s\n", ptr, _valuestr);
+#endif
+ if(!strcmp(ptr, name)){
+ return _valuestr;
+ }
+ if((strlen(ptr) > 1) && !strcmp(&ptr[1], name))
+ return _valuestr;
+ }
+ break;
+
+ default:
+ /* Unknown TLV type, skip it. */
+ break;
+ }
+
+ /*
+ * Advance to next TLV
+ */
+
+ size -= (int)reclen;
+ offset += reclen;
+
+ /* Read the next record type */
+ ptr = buffer;
+ if (_nvram_read(nv_buf, ptr,offset,1) != 1)
+ goto error;
+ }
+
+error:
+ return NULL;
+
+}
+
diff --git a/target/linux/brcm47xx/files/arch/mips/bcm47xx/include/nvram.h b/target/linux/brcm47xx/files/arch/mips/bcm47xx/include/nvram.h
new file mode 100644
index 0000000000..6bb18e8e5f
--- /dev/null
+++ b/target/linux/brcm47xx/files/arch/mips/bcm47xx/include/nvram.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2006 Felix Fietkau <nbd@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.
+ */
+
+#ifndef __NVRAM_H
+#define __NVRAM_H
+
+struct nvram_header {
+ u32 magic;
+ u32 len;
+ u32 crc_ver_init; /* 0:7 crc, 8:15 ver, 16:31 sdram_init */
+ u32 config_refresh; /* 0:15 sdram_config, 16:31 sdram_refresh */
+ u32 config_ncdl; /* ncdl values for memc */
+};
+
+struct nvram_tuple {
+ char *name;
+ char *value;
+ struct nvram_tuple *next;
+};
+
+#define NVRAM_HEADER 0x48534C46 /* 'FLSH' */
+#define NVRAM_VERSION 1
+#define NVRAM_HEADER_SIZE 20
+#define NVRAM_SPACE 0x8000
+
+#define NVRAM_MAX_VALUE_LEN 255
+#define NVRAM_MAX_PARAM_LEN 64
+
+char *nvram_get(const char *name);
+
+#endif
diff --git a/target/linux/brcm47xx/files/arch/mips/bcm47xx/nvram.c b/target/linux/brcm47xx/files/arch/mips/bcm47xx/nvram.c
new file mode 100644
index 0000000000..3f32ad9d6e
--- /dev/null
+++ b/target/linux/brcm47xx/files/arch/mips/bcm47xx/nvram.c
@@ -0,0 +1,125 @@
+/*
+ * BCM947xx nvram variable access
+ *
+ * Copyright 2005, Broadcom Corporation
+ * Copyright 2006, Felix Fietkau <nbd@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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/ssb/ssb.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/slab.h>
+#include <asm/byteorder.h>
+#include <asm/bootinfo.h>
+#include <asm/addrspace.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#include <nvram.h>
+
+#define MB * 1048576
+extern struct ssb_bus ssb;
+
+static char nvram_buf[NVRAM_SPACE];
+static int cfe_env;
+extern char *cfe_env_get(char *nv_buf, const char *name);
+
+/* Probe for NVRAM header */
+static void __init early_nvram_init(void)
+{
+ struct ssb_mipscore *mcore = &ssb.mipscore;
+ struct nvram_header *header;
+ int i;
+ u32 base, lim, off;
+ u32 *src, *dst;
+
+ base = mcore->flash_window;
+ lim = mcore->flash_window_size;
+ cfe_env = 0;
+
+
+ /* XXX: hack for supporting the CFE environment stuff on WGT634U */
+ if (lim >= 8 MB) {
+ src = (u32 *) KSEG1ADDR(base + 8 MB - 0x2000);
+ dst = (u32 *) nvram_buf;
+
+ if ((*src & 0xff00ff) == 0x000001) {
+ printk("early_nvram_init: WGT634U NVRAM found.\n");
+
+ for (i = 0; i < 0x1ff0; i++) {
+ if (*src == 0xFFFFFFFF)
+ break;
+ *dst++ = *src++;
+ }
+ cfe_env = 1;
+ return;
+ }
+ }
+
+ off = 0x20000;
+ while (off <= lim) {
+ /* Windowed flash access */
+ header = (struct nvram_header *) KSEG1ADDR(base + off - NVRAM_SPACE);
+ if (header->magic == NVRAM_HEADER)
+ goto found;
+ off <<= 1;
+ }
+
+ /* Try embedded NVRAM at 4 KB and 1 KB as last resorts */
+ header = (struct nvram_header *) KSEG1ADDR(base + 4096);
+ if (header->magic == NVRAM_HEADER)
+ goto found;
+
+ header = (struct nvram_header *) KSEG1ADDR(base + 1024);
+ if (header->magic == NVRAM_HEADER)
+ goto found;
+
+ return;
+
+found:
+ src = (u32 *) header;
+ dst = (u32 *) nvram_buf;
+ for (i = 0; i < sizeof(struct nvram_header); i += 4)
+ *dst++ = *src++;
+ for (; i < header->len && i < NVRAM_SPACE; i += 4)
+ *dst++ = le32_to_cpu(*src++);
+}
+
+char *nvram_get(const char *name)
+{
+ char *var, *value, *end, *eq;
+
+ if (!name)
+ return NULL;
+
+ if (!nvram_buf[0])
+ early_nvram_init();
+
+ if (cfe_env)
+ return cfe_env_get(nvram_buf, name);
+
+ /* Look for name=value and return value */
+ var = &nvram_buf[sizeof(struct nvram_header)];
+ end = nvram_buf + sizeof(nvram_buf) - 2;
+ end[0] = end[1] = '\0';
+ for (; *var; var = value + strlen(value) + 1) {
+ if (!(eq = strchr(var, '=')))
+ break;
+ value = eq + 1;
+ if ((eq - var) == strlen(name) && strncmp(var, name, (eq - var)) == 0)
+ return value;
+ }
+
+ return NULL;
+}
+
+EXPORT_SYMBOL(nvram_get);
diff --git a/target/linux/brcm47xx/files/arch/mips/include/asm/mach-bcm47xx/kernel-entry-init.h b/target/linux/brcm47xx/files/arch/mips/include/asm/mach-bcm47xx/kernel-entry-init.h
new file mode 100644
index 0000000000..7df0dc2b5a
--- /dev/null
+++ b/target/linux/brcm47xx/files/arch/mips/include/asm/mach-bcm47xx/kernel-entry-init.h
@@ -0,0 +1,26 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2005 Embedded Alley Solutions, Inc
+ * Copyright (C) 2005 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2006 Michael Buesch
+ */
+#ifndef __ASM_MACH_GENERIC_KERNEL_ENTRY_H
+#define __ASM_MACH_GENERIC_KERNEL_ENTRY_H
+
+/* Intentionally empty macro, used in head.S. Override in
+ * arch/mips/mach-xxx/kernel-entry-init.h when necessary.
+ */
+ .macro kernel_entry_setup
+ .endm
+
+/*
+ * Do SMP slave processor setup necessary before we can savely execute C code.
+ */
+ .macro smp_slave_setup
+ .endm
+
+
+#endif /* __ASM_MACH_GENERIC_KERNEL_ENTRY_H */
diff --git a/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c b/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c
new file mode 100644
index 0000000000..3ceec403cf
--- /dev/null
+++ b/target/linux/brcm47xx/files/drivers/mtd/maps/bcm47xx-flash.c
@@ -0,0 +1,440 @@
+/*
+ * 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 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 <linux/init.h>
+#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>
+#ifdef CONFIG_MTD_PARTITIONS
+#include <linux/mtd/partitions.h>
+#endif
+#include <linux/crc32.h>
+#ifdef CONFIG_SSB
+#include <linux/ssb/ssb.h>
+#endif
+#include <asm/io.h>
+
+
+#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
+
+#ifdef CONFIG_SSB
+extern struct ssb_bus ssb_bcm47xx;
+#endif
+static struct mtd_info *bcm47xx_mtd;
+
+static void bcm47xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ if (len==1) {
+ memcpy_fromio(to, map->virt + from, len);
+ } else {
+ int i;
+ u16 *dest = (u16 *) to;
+ u16 *src = (u16 *) (map->virt + from);
+ for (i = 0; i < (len / 2); i++) {
+ dest[i] = src[i];
+ }
+ if (len & 1)
+ *((u8 *)dest+len-1) = src[i] & 0xff;
+ }
+}
+
+static struct map_info bcm47xx_map = {
+ name: "Physically mapped flash",
+ size: WINDOW_SIZE,
+ bankwidth: BUSWIDTH,
+ phys: WINDOW_ADDR,
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+
+static struct mtd_partition bcm47xx_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: 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;
+
+ /* Move the fs outside of the trx */
+ part->size = 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 */
+ bcm47xx_parts[0].offset = 0;
+ bcm47xx_parts[0].size = cfe_size;
+
+ /* nvram */
+ if (cfe_size != 384 * 1024) {
+ bcm47xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ } else {
+ /* nvram (old 128kb config partition on netgear wgt634u) */
+ bcm47xx_parts[3].offset = bcm47xx_parts[0].size;
+ bcm47xx_parts[3].size = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
+ }
+
+ /* linux (kernel and rootfs) */
+ if (cfe_size != 384 * 1024) {
+ bcm47xx_parts[1].offset = bcm47xx_parts[0].size;
+ bcm47xx_parts[1].size = bcm47xx_parts[3].offset -
+ bcm47xx_parts[1].offset;
+ } else {
+ /* do not count the elf loader, which is on one block */
+ bcm47xx_parts[1].offset = bcm47xx_parts[0].size +
+ bcm47xx_parts[3].size + mtd->erasesize;
+ bcm47xx_parts[1].size = size -
+ bcm47xx_parts[0].size -
+ (2*bcm47xx_parts[3].size) -
+ mtd->erasesize;
+ }
+
+ /* find and size rootfs */
+ find_root(mtd,size,&bcm47xx_parts[2]);
+ bcm47xx_parts[2].size = size - bcm47xx_parts[2].offset - bcm47xx_parts[3].size;
+
+ return bcm47xx_parts;
+}
+#endif
+
+int __init init_bcm47xx_map(void)
+{
+#ifdef CONFIG_SSB
+ struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
+#endif
+ size_t size;
+ int ret = 0;
+#ifdef CONFIG_MTD_PARTITIONS
+ struct mtd_partition *parts;
+ int i;
+#endif
+
+#ifdef CONFIG_SSB
+ u32 window = mcore->flash_window;
+ u32 window_size = mcore->flash_window_size;
+
+ printk("flash init: 0x%08x 0x%08x\n", window, window_size);
+ bcm47xx_map.phys = window;
+ bcm47xx_map.size = window_size;
+ bcm47xx_map.bankwidth = mcore->flash_buswidth;
+ bcm47xx_map.virt = ioremap_nocache(window, window_size);
+#else
+ printk("flash init: 0x%08x 0x%08x\n", WINDOW_ADDR, WINDOW_SIZE);
+ bcm47xx_map.virt = ioremap_nocache(WINDOW_ADDR, WINDOW_SIZE);
+#endif
+
+ if (!bcm47xx_map.virt) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+
+ simple_map_init(&bcm47xx_map);
+
+ if (!(bcm47xx_mtd = do_map_probe("cfi_probe", &bcm47xx_map))) {
+ printk("Failed to do_map_probe\n");
+ iounmap((void *)bcm47xx_map.virt);
+ return -ENXIO;
+ }
+
+ /* override copy_from routine */
+ bcm47xx_map.copy_from = bcm47xx_map_copy_from;
+
+ bcm47xx_mtd->owner = THIS_MODULE;
+
+ size = bcm47xx_mtd->size;
+
+ printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
+
+#ifdef CONFIG_MTD_PARTITIONS
+ parts = init_mtd_partitions(bcm47xx_mtd, size);
+ for (i = 0; parts[i].name; i++);
+ ret = add_mtd_partitions(bcm47xx_mtd, parts, i);
+ if (ret) {
+ printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
+ goto fail;
+ }
+#endif
+ return 0;
+
+ fail:
+ if (bcm47xx_mtd)
+ map_destroy(bcm47xx_mtd);
+ if (bcm47xx_map.virt)
+ iounmap((void *)bcm47xx_map.virt);
+ bcm47xx_map.virt = 0;
+ return ret;
+}
+
+void __exit cleanup_bcm47xx_map(void)
+{
+#ifdef CONFIG_MTD_PARTITIONS
+ del_mtd_partitions(bcm47xx_mtd);
+#endif
+ map_destroy(bcm47xx_mtd);
+ iounmap((void *)bcm47xx_map.virt);
+}
+
+module_init(init_bcm47xx_map);
+module_exit(cleanup_bcm47xx_map);