diff options
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.c | 547 |
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 eea7f137d7..0000000000 --- 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); |