+++ /dev/null
-/*
- * 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 / svn-archive / archive.git / blobdiff