+Index: linux-2.6.30.8/drivers/mtd/maps/ifxmips.c
+===================================================================
+--- /dev/null 1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.8/drivers/mtd/maps/ifxmips.c 2009-10-19 21:40:44.000000000 +0200
+@@ -0,0 +1,277 @@
++/*
++ * 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 program is distributed in the hope that it will be useful,
++ * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ * GNU General Public License for more details.
++ *
++ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
++ *
++ * Copyright (C) 2004 Liu Peng Infineon IFAP DC COM CPE
++ * Copyright (C) 2008 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/module.h>
++#include <linux/types.h>
++#include <linux/kernel.h>
++#include <linux/io.h>
++#include <linux/init.h>
++#include <linux/mtd/mtd.h>
++#include <linux/mtd/map.h>
++#include <linux/mtd/partitions.h>
++#include <linux/mtd/cfi.h>
++#include <linux/magic.h>
++#include <linux/platform_device.h>
++
++#include <ifxmips.h>
++#include <ifxmips_prom.h>
++#include <ifxmips_ebu.h>
++
++#ifndef CONFIG_MTD_PARTITIONS
++#error Please enable CONFIG_MTD_PARTITIONS
++#endif
++
++static struct map_info ifxmips_map = {
++ .name = "ifx-nor",
++ .bankwidth = 2,
++ .size = 0x400000,
++};
++
++static map_word ifxmips_read16(struct map_info *map, unsigned long adr)
++{
++ unsigned long flags;
++ map_word temp;
++ spin_lock_irqsave(&ebu_lock, flags);
++ adr ^= 2;
++ temp.x[0] = *((__u16 *)(map->virt + adr));
++ spin_unlock_irqrestore(&ebu_lock, flags);
++ return temp;
++}
++
++static void ifxmips_write16(struct map_info *map, map_word d, unsigned long adr)
++{
++ unsigned long flags;
++ spin_lock_irqsave(&ebu_lock, flags);
++ adr ^= 2;
++ *((__u16 *)(map->virt + adr)) = d.x[0];
++ spin_unlock_irqrestore(&ebu_lock, flags);
++}
++
++void ifxmips_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
++{
++ unsigned char *p;
++ unsigned char *to_8;
++ unsigned long flags;
++ spin_lock_irqsave(&ebu_lock, flags);
++ from = (unsigned long)(from + map->virt);
++ p = (unsigned char *) from;
++ to_8 = (unsigned char *) to;
++ while (len--)
++ *to_8++ = *p++;
++ spin_unlock_irqrestore(&ebu_lock, flags);
++}
++
++void ifxmips_copy_to(struct map_info *map,
++ unsigned long to,
++ const void *from,
++ ssize_t len)
++{
++ unsigned char *p = (unsigned char *)from;
++ unsigned char *to_8;
++ unsigned long flags;
++ spin_lock_irqsave(&ebu_lock, flags);
++ to += (unsigned long) map->virt;
++ to_8 = (unsigned char *)to;
++ while (len--)
++ *p++ = *to_8++;
++ spin_unlock_irqrestore(&ebu_lock, flags);
++}
++
++static struct mtd_partition ifxmips_partitions[] = {
++ {
++ .name = "uboot",
++ .offset = 0x00000000,
++ .size = 0x00020000,
++ },
++ {
++ .name = "uboot_env",
++ .offset = 0x00020000,
++ .size = 0x00010000,
++ },
++ {
++ .name = "kernel",
++ .offset = 0x00030000,
++ .size = 0x0,
++ },
++ {
++ .name = "rootfs",
++ .offset = 0x0,
++ .size = 0x0,
++ },
++ {
++ .name = "board_config",
++ .offset = 0x0,
++ .size = 0x0,
++ },
++};
++
++static struct mtd_partition ifxmips_meta_partition = {
++ .name = "linux",
++ .offset = 0x00030000,
++ .size = 0x0,
++};
++
++static const char *part_probe_types[] = { "cmdlinepart", NULL };
++
++int find_uImage_size(unsigned long start_offset)
++{
++ unsigned long magic;
++ unsigned long temp;
++ ifxmips_copy_from(&ifxmips_map, &magic, start_offset, 4);
++ if (le32_to_cpu(magic) != 0x56190527) {
++ printk(KERN_INFO "ifxmips_mtd: invalid magic (0x%08X) of kernel at 0x%08lx \n", le32_to_cpu(magic), start_offset);
++ return 0;
++ }
++ ifxmips_copy_from(&ifxmips_map, &temp, start_offset + 12, 4);
++ printk(KERN_INFO "ifxmips_mtd: kernel size is %ld \n", temp + 0x40);
++ return temp + 0x40;
++}
++
++int find_brn_block(unsigned long start_offset)
++{
++ unsigned char temp[9];
++ ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 8);
++ temp[8] = '\0';
++ printk(KERN_INFO "data in brn block %s\n", temp);
++ if (memcmp(temp, "BRN-BOOT", 8) == 0)
++ return 1;
++ else
++ return 0;
++}
++
++int detect_squashfs_partition(unsigned long start_offset)
++{
++ unsigned long temp;
++ ifxmips_copy_from(&ifxmips_map, &temp, start_offset, 4);
++ return le32_to_cpu(temp) == SQUASHFS_MAGIC;
++}
++
++static int ifxmips_mtd_probe(struct platform_device *dev)
++{
++ struct mtd_info *ifxmips_mtd = NULL;
++ struct mtd_partition *parts = NULL;
++ unsigned long uimage_size;
++ int err, i;
++ int kernel_part = 2, rootfs_part = 3;
++ int num_parts = ARRAY_SIZE(ifxmips_partitions);
++
++ ifxmips_w32(0x1d7ff, IFXMIPS_EBU_BUSCON0);
++
++ ifxmips_map.read = ifxmips_read16;
++ ifxmips_map.write = ifxmips_write16;
++ ifxmips_map.copy_from = ifxmips_copy_from;
++ ifxmips_map.copy_to = ifxmips_copy_to;
++ ifxmips_map.phys = dev->resource->start;
++ ifxmips_map.size = dev->resource->end - ifxmips_map.phys + 1;
++ ifxmips_map.virt = ioremap_nocache(ifxmips_map.phys, ifxmips_map.size);
++
++ if (!ifxmips_map.virt) {
++ printk(KERN_WARNING "ifxmips_mtd: failed to ioremap!\n");
++ return -EIO;
++ }
++
++ ifxmips_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &ifxmips_map);
++ if (!ifxmips_mtd) {
++ iounmap(ifxmips_map.virt);
++ printk(KERN_WARNING "ifxmips_mtd: probing failed\n");
++ return -ENXIO;
++ }
++
++ ifxmips_mtd->owner = THIS_MODULE;
++
++ err = parse_mtd_partitions(ifxmips_mtd, part_probe_types, &parts, 0);
++ if (err > 0) {
++ printk(KERN_INFO "ifxmips_mtd: found %d partitions from cmdline\n", err);
++ num_parts = err;
++ kernel_part = 0;
++ rootfs_part = 0;
++ for (i = 0; i < num_parts; i++) {
++ if (strcmp(parts[i].name, "kernel") == 0)
++ kernel_part = i;
++ if (strcmp(parts[i].name, "rootfs") == 0)
++ rootfs_part = i;
++ }
++ } else {
++ parts = &ifxmips_partitions[0];
++ }
++
++ /* dynamic size detection only if rootfs-part follows kernel-part */
++ if (kernel_part+1 == rootfs_part) {
++ uimage_size = find_uImage_size(parts[kernel_part].offset);
++
++ if (detect_squashfs_partition(parts[kernel_part].offset + uimage_size)) {
++ printk(KERN_INFO "ifxmips_mtd: found a squashfs following the uImage\n");
++ } else {
++ uimage_size &= ~0xffff;
++ uimage_size += 0x10000;
++ }
++
++ parts[kernel_part].size = uimage_size;
++ parts[rootfs_part].offset = parts[kernel_part].offset + parts[kernel_part].size;
++ parts[rootfs_part].size = ((ifxmips_mtd->size >> 20) * 1024 * 1024) - parts[rootfs_part].offset;
++
++ ifxmips_meta_partition.offset = parts[kernel_part].offset;
++ ifxmips_meta_partition.size = parts[kernel_part].size + parts[rootfs_part].size;
++ }
++
++ if (err <= 0) {
++ if (ifxmips_has_brn_block()) {
++ parts[3].size -= ifxmips_mtd->erasesize;
++ parts[4].offset = ifxmips_mtd->size - ifxmips_mtd->erasesize;
++ parts[4].size = ifxmips_mtd->erasesize;
++ } else {
++ num_parts--;
++ }
++ }
++
++ add_mtd_partitions(ifxmips_mtd, parts, num_parts);
++ add_mtd_partitions(ifxmips_mtd, &ifxmips_meta_partition, 1);
++
++ printk(KERN_INFO "ifxmips_mtd: added %s flash with %dMB\n",
++ ifxmips_map.name, ((int)ifxmips_mtd->size) >> 20);
++ return 0;
++}
++
++static struct platform_driver ifxmips_mtd_driver = {
++ .probe = ifxmips_mtd_probe,
++ .driver = {
++ .name = "ifxmips_mtd",
++ .owner = THIS_MODULE,
++ },
++};
++
++int __init init_ifxmips_mtd(void)
++{
++ int ret = platform_driver_register(&ifxmips_mtd_driver);
++ if (ret)
++ printk(KERN_INFO "ifxmips_mtd: error registering platfom driver!");
++ return ret;
++}
++
++static void __exit cleanup_ifxmips_mtd(void)
++{
++ platform_driver_unregister(&ifxmips_mtd_driver);
++}
++
++module_init(init_ifxmips_mtd);
++module_exit(cleanup_ifxmips_mtd);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_DESCRIPTION("MTD map driver for IFXMIPS boards");
projects / openwrt.git / blobdiff