adm5120_mtd.c is no longer in use

SVN-Revision: 8129

target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120_mtd.c

@@ -1,497 +0,0 @@
-/*
- *  Copyright (C) 2006 Felix Fietkau <[email protected]>
- *  Copyright (C) 2005 Waldemar Brodkorb <[email protected]>
- *  Copyright (C) 2004 Florian Schirmer ([email protected])
- *
- *  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 ADM5120 boards
- */
-
-#include <linux/init.h>
-#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>
-#include <linux/sched.h>
-#ifdef CONFIG_MTD_PARTITIONS
-#include <linux/mtd/partitions.h>
-#endif
-#include <linux/squashfs_fs.h>
-#include <linux/jffs2.h>
-#include <linux/crc32.h>
-#include <asm/io.h>
-#include <asm/mach-adm5120/myloader.h>
-#include <asm/mach-adm5120/adm5120_info.h>
-
-extern int parse_myloader_partitions(struct mtd_info *master,
-                        struct mtd_partition **pparts,
-                        unsigned long origin);
-
-/* Macros for switching flash bank
-   ADM5120 only support 2MB flash address space
-   so GPIO5 is used as A20
- */
-#define GPIO_IO        ((volatile unsigned long *)0xb20000b8)
-#define FLASH_A20_GPIO  5
-#define FLASH_BOUNDARY  0x200000
-
-
-#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
-
-static struct mtd_info *adm5120_mtd;
-
-static struct map_info adm5120_map = {
-	name: "adm5120 physically mapped flash",
-	size: WINDOW_SIZE,
-	bankwidth: BUSWIDTH,
-	phys: WINDOW_ADDR,
-};
-
-#ifdef CONFIG_MTD_PARTITIONS
-
-static struct mtd_partition adm5120_cfe_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 void flash_switch_bank(unsigned long addr)
-{
-	unsigned long val;
-
-	/* Set GPIO as output */
-	val = *GPIO_IO | (1 << (FLASH_A20_GPIO+16));
-	if ( addr & FLASH_BOUNDARY ) {
-		val |= 1 << (FLASH_A20_GPIO + 24);
-	} else {
-		val &= ~(1 << (FLASH_A20_GPIO + 24));
-	}
-	*GPIO_IO = val;
-}
-
-static map_word adm5120_map_read(struct map_info *map, unsigned long ofs)
-{
-    flash_switch_bank(ofs);
-	return inline_map_read(map, ofs);
-}
-
-static void adm5120_map_write(struct map_info *map, const map_word datum, unsigned long ofs)
-{
-    flash_switch_bank(ofs);
-	inline_map_write(map, datum, ofs);
-}
-
-static void adm5120_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
-{
-	ssize_t tmp;
-
-	if (from < FLASH_BOUNDARY) {
-		tmp = (len < (FLASH_BOUNDARY - from)) ? len : (FLASH_BOUNDARY - from);
-		flash_switch_bank(0);
-		inline_map_copy_from(map, to, from, tmp);
-		to = (void *)((char *)to + tmp);
-		from += tmp;
-		len -= tmp;
-	}
-	if (len > 0) {
-		flash_switch_bank(FLASH_BOUNDARY);
-		inline_map_copy_from(map, to, from, len);
-	}
-
-}
-
-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 */
-	adm5120_cfe_parts[0].offset = 0;
-	adm5120_cfe_parts[0].size   = cfe_size;
-
-	/* nvram */
-	if (cfe_size != 384 * 1024) {
-		adm5120_cfe_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-		adm5120_cfe_parts[3].size   = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-	} else {
-		/* nvram (old 128kb config partition on netgear wgt634u) */
-		adm5120_cfe_parts[3].offset = adm5120_cfe_parts[0].size;
-		adm5120_cfe_parts[3].size   = ROUNDUP(NVRAM_SPACE, mtd->erasesize);
-	}
-
-	/* linux (kernel and rootfs) */
-	if (cfe_size != 384 * 1024) {
-		adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size;
-		adm5120_cfe_parts[1].size   = adm5120_cfe_parts[3].offset -
-			adm5120_cfe_parts[1].offset;
-	} else {
-		/* do not count the elf loader, which is on one block */
-		adm5120_cfe_parts[1].offset = adm5120_cfe_parts[0].size +
-			adm5120_cfe_parts[3].size + mtd->erasesize;
-		adm5120_cfe_parts[1].size   = size -
-			adm5120_cfe_parts[0].size -
-			(2*adm5120_cfe_parts[3].size) -
-			mtd->erasesize;
-	}
-
-	/* find and size rootfs */
-	find_root(mtd,size,&adm5120_cfe_parts[2]);
-	adm5120_cfe_parts[2].size = size - adm5120_cfe_parts[2].offset - adm5120_cfe_parts[3].size;
-
-	return adm5120_cfe_parts;
-}
-#endif
-
-int __init init_adm5120_map(void)
-{
-	size_t size;
-	int ret = 0;
-#if defined (CONFIG_MTD_PARTITIONS) || (CONFIG_MTD_MYLOADER_PARTS)
-	struct mtd_partition *parts;
-	int i, parsed_nr_parts = 0;
-#endif
-
-	if (adm5120_nand_boot)
-		return -ENODEV;
-
-	printk("adm5120 : flash init : 0x%08x 0x%08x\n", WINDOW_ADDR, adm5120_board.flash0_size);
-	adm5120_map.virt = ioremap_nocache(WINDOW_ADDR, adm5120_board.flash0_size);
-
-	if (!adm5120_map.virt) {
-		printk("Failed to ioremap\n");
-		return -EIO;
-	}
-	simple_map_init(&adm5120_map);
-	adm5120_map.read = adm5120_map_read;
-	adm5120_map.write = adm5120_map_write;
-	adm5120_map.copy_from = adm5120_map_copy_from;
-
-	if (!(adm5120_mtd = do_map_probe("cfi_probe", &adm5120_map))) {
-		printk("Failed to do_map_probe\n");
-		iounmap((void *)adm5120_map.virt);
-		return -ENXIO;
-	}
-
-	adm5120_mtd->owner = THIS_MODULE;
-
-	size = adm5120_mtd->size;
-
-	printk(KERN_NOTICE "Flash device: 0x%x at 0x%x\n", size, WINDOW_ADDR);
-
-#ifdef CONFIG_MTD_PARTITIONS
-
-	if (adm5120_boot_loader == BOOT_LOADER_CFE || adm5120_boot_loader == BOOT_LOADER_UNKNOWN)
-	{
-		printk(KERN_NOTICE "adm5120 : using CFE flash mapping\n");
-		parts = init_mtd_partitions(adm5120_mtd, size);
-
-		for (i = 0; parts[i].name; i++);
-		ret = add_mtd_partitions(adm5120_mtd, parts, i);
-
-		if (ret) {
-			printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
-			goto fail;
-		}
-	}
-#endif
-#ifdef CONFIG_MTD_MYLOADER_PARTS
-	if (adm5120_boot_loader == BOOT_LOADER_MYLOADER)
-	{
-		printk(KERN_NOTICE "adm5120 : using MyLoader flash mapping\n");
-		char *part_type;
-
-		if (parsed_nr_parts == 0) {
-			ret = parse_myloader_partitions(adm5120_mtd, &parts, 0);
-
-			if (ret  > 0) {
-				part_type ="MyLoader";
-				parsed_nr_parts = ret;
-			}
-		}
-		ret = add_mtd_partitions(adm5120_mtd, parts, parsed_nr_parts);
-
-		if (ret) {
-			printk(KERN_ERR "Flash: add_mtd_partitions failed\n");
-			goto fail;
-		}
-	}
-#endif
-	return 0;
-
- fail:
-	if (adm5120_mtd)
-		map_destroy(adm5120_mtd);
-	if (adm5120_map.virt)
-		iounmap((void *)adm5120_map.virt);
-	adm5120_map.virt = 0;
-	return ret;
-}
-
-void __exit cleanup_adm5120_map(void)
-{
-#ifdef CONFIG_MTD_PARTITIONS
-	del_mtd_partitions(adm5120_mtd);
-#endif
-	map_destroy(adm5120_mtd);
-	iounmap((void *)adm5120_map.virt);
-}
-
-module_init(init_adm5120_map);
-module_exit(cleanup_adm5120_map);