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Diffstat (limited to 'target/linux/brcm-2.4/files/drivers/mtd/maps/bcm947xx-flash.c')
-rw-r--r--target/linux/brcm-2.4/files/drivers/mtd/maps/bcm947xx-flash.c547
1 files changed, 0 insertions, 547 deletions
diff --git a/target/linux/brcm-2.4/files/drivers/mtd/maps/bcm947xx-flash.c b/target/linux/brcm-2.4/files/drivers/mtd/maps/bcm947xx-flash.c
deleted file mode 100644
index eea7f137d..000000000
--- a/target/linux/brcm-2.4/files/drivers/mtd/maps/bcm947xx-flash.c
+++ /dev/null
@@ -1,547 +0,0 @@
-/*
- * 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 BCM947XX boards
- *
- */
-
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.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/config.h>
-#include <linux/squashfs_fs.h>
-#include <linux/jffs2.h>
-#include <linux/crc32.h>
-#include <asm/io.h>
-
-#include <typedefs.h>
-#include <osl.h>
-#include <bcmnvram.h>
-#include <sbconfig.h>
-#include <sbchipc.h>
-#include <sbutils.h>
-#include <trxhdr.h>
-
-/* Global SB handle */
-extern void *bcm947xx_sbh;
-extern spinlock_t bcm947xx_sbh_lock;
-
-/* Convenience */
-#define sbh bcm947xx_sbh
-#define sbh_lock bcm947xx_sbh_lock
-
-#define WINDOW_ADDR 0x1fc00000
-#define WINDOW_SIZE 0x400000
-#define BUSWIDTH 2
-
-static struct mtd_info *bcm947xx_mtd;
-
-__u8 bcm947xx_map_read8(struct map_info *map, unsigned long ofs)
-{
- if (map->map_priv_2 == 1)
- return __raw_readb(map->map_priv_1 + ofs);
-
- u16 val = __raw_readw(map->map_priv_1 + (ofs & ~1));
- if (ofs & 1)
- return ((val >> 8) & 0xff);
- else
- return (val & 0xff);
-}
-
-__u16 bcm947xx_map_read16(struct map_info *map, unsigned long ofs)
-{
- return __raw_readw(map->map_priv_1 + ofs);
-}
-
-__u32 bcm947xx_map_read32(struct map_info *map, unsigned long ofs)
-{
- return __raw_readl(map->map_priv_1 + ofs);
-}
-
-void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-{
- if (len==1) {
- memcpy_fromio(to, map->map_priv_1 + from, len);
- } else {
- int i;
- u16 *dest = (u16 *) to;
- u16 *src = (u16 *) (map->map_priv_1 + from);
- for (i = 0; i < (len / 2); i++) {
- dest[i] = src[i];
- }
- if (len & 1)
- *((u8 *)dest+len-1) = src[i] & 0xff;
- }
-}
-
-void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
-{
- __raw_writeb(d, map->map_priv_1 + adr);
- mb();
-}
-
-void bcm947xx_map_write16(struct map_info *map, __u16 d, unsigned long adr)
-{
- __raw_writew(d, map->map_priv_1 + adr);
- mb();
-}
-
-void bcm947xx_map_write32(struct map_info *map, __u32 d, unsigned long adr)
-{
- __raw_writel(d, map->map_priv_1 + adr);
- mb();
-}
-
-void bcm947xx_map_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
-{
- memcpy_toio(map->map_priv_1 + to, from, len);
-}
-
-struct map_info bcm947xx_map = {
- name: "Physically mapped flash",
- size: WINDOW_SIZE,
- buswidth: BUSWIDTH,
- read8: bcm947xx_map_read8,
- read16: bcm947xx_map_read16,
- read32: bcm947xx_map_read32,
- copy_from: bcm947xx_map_copy_from,
- write8: bcm947xx_map_write8,
- write16: bcm947xx_map_write16,
- write32: bcm947xx_map_write32,
- copy_to: bcm947xx_map_copy_to
-};
-
-#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: "rootfs_data", 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 */
- trx2 = block = kmalloc(mtd->erasesize, GFP_KERNEL);
- 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
-
-
-mod_init_t init_bcm947xx_map(void)
-{
- ulong flags;
- uint coreidx;
- chipcregs_t *cc;
- uint32 fltype;
- uint window_addr = 0, window_size = 0;
- size_t size;
- int ret = 0;
-#ifdef CONFIG_MTD_PARTITIONS
- struct mtd_partition *parts;
- int i;
-#endif
-
- spin_lock_irqsave(&sbh_lock, flags);
- coreidx = sb_coreidx(sbh);
-
- /* Check strapping option if chipcommon exists */
- if ((cc = sb_setcore(sbh, SB_CC, 0))) {
- fltype = readl(&cc->capabilities) & CC_CAP_FLASH_MASK;
- if (fltype == PFLASH) {
- bcm947xx_map.map_priv_2 = 1;
- window_addr = 0x1c000000;
- bcm947xx_map.size = window_size = 32 * 1024 * 1024;
- if ((readl(&cc->flash_config) & CC_CFG_DS) == 0)
- bcm947xx_map.buswidth = 1;
- }
- } else {
- fltype = PFLASH;
- bcm947xx_map.map_priv_2 = 0;
- window_addr = WINDOW_ADDR;
- window_size = WINDOW_SIZE;
- }
-
- sb_setcoreidx(sbh, coreidx);
- spin_unlock_irqrestore(&sbh_lock, flags);
-
- if (fltype != PFLASH) {
- printk(KERN_ERR "pflash: found no supported devices\n");
- ret = -ENODEV;
- goto fail;
- }
-
- bcm947xx_map.map_priv_1 = (unsigned long) ioremap(window_addr, window_size);
-
- if (!bcm947xx_map.map_priv_1) {
- printk(KERN_ERR "Failed to ioremap\n");
- return -EIO;
- }
-
- if (!(bcm947xx_mtd = do_map_probe("cfi_probe", &bcm947xx_map))) {
- printk(KERN_ERR "pflash: cfi_probe failed\n");
- iounmap((void *)bcm947xx_map.map_priv_1);
- return -ENXIO;
- }
-
- bcm947xx_mtd->module = 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.map_priv_1)
- iounmap((void *) bcm947xx_map.map_priv_1);
- bcm947xx_map.map_priv_1 = 0;
- return ret;
-}
-
-mod_exit_t cleanup_bcm947xx_map(void)
-{
-#ifdef CONFIG_MTD_PARTITIONS
- del_mtd_partitions(bcm947xx_mtd);
-#endif
- map_destroy(bcm947xx_mtd);
- iounmap((void *) bcm947xx_map.map_priv_1);
- bcm947xx_map.map_priv_1 = 0;
-}
-
-module_init(init_bcm947xx_map);
-module_exit(cleanup_bcm947xx_map);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 12:35:09 +0000