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authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-12-20 22:29:45 +0000
committerblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2007-12-20 22:29:45 +0000
commita7c087dc66fe93974b9380327e472d1150976e15 (patch)
treea7fb7168faa3c73288de9f7af0b7201470dcd672 /target/linux/ifxmips/files/drivers/mtd
parent0e161e6b11ce3e1166510710e720ffb5293dbccd (diff)
move danube folder to ifxmips, to allow future integration of the other chips
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@9815 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ifxmips/files/drivers/mtd')
-rw-r--r--target/linux/ifxmips/files/drivers/mtd/maps/danube.c194
1 files changed, 194 insertions, 0 deletions
diff --git a/target/linux/ifxmips/files/drivers/mtd/maps/danube.c b/target/linux/ifxmips/files/drivers/mtd/maps/danube.c
new file mode 100644
index 000000000..25e9df3de
--- /dev/null
+++ b/target/linux/ifxmips/files/drivers/mtd/maps/danube.c
@@ -0,0 +1,194 @@
+/*
+ * Driver for DANUBE flashmap
+ *
+ * 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) 2007 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <asm/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 <asm/danube/danube.h>
+#include <linux/magic.h>
+
+static struct map_info
+danube_map = {
+ .name = "DANUBE_FLASH",
+ .bankwidth = 2,
+ .size = 0x400000,
+};
+
+static map_word
+danube_read16 (struct map_info * map, unsigned long adr)
+{
+ map_word temp;
+
+ adr ^= 2;
+ temp.x[0] = *((__u16 *) (map->virt + adr));
+
+ return temp;
+}
+
+static void
+danube_write16 (struct map_info *map, map_word d, unsigned long adr)
+{
+ adr ^= 2;
+ *((__u16 *) (map->virt + adr)) = d.x[0];
+}
+
+void
+danube_copy_from (struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ u8 *p;
+ u8 *to_8;
+
+ from = (unsigned long) (from + map->virt);
+ p = (u8 *) from;
+ to_8 = (u8 *) to;
+ while(len--){
+ *to_8++ = *p++;
+ }
+}
+
+void
+danube_copy_to (struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+ u8 *p = (u8*) from;
+ u8 *to_8;
+
+ to += (unsigned long) map->virt;
+ to_8 = (u8*)to;
+ while(len--){
+ *p++ = *to_8++;
+ }
+}
+
+static struct mtd_partition
+danube_partitions[4] = {
+ {
+ name:"U-Boot",
+ offset:0x00000000,
+ size:0x00020000,
+ },
+ {
+ name:"U-Boot-Env",
+ offset:0x00020000,
+ size:0x00010000,
+ },
+ {
+ name:"kernel",
+ offset:0x00030000,
+ size:0x0,
+ },
+ {
+ name:"rootfs",
+ offset:0x0,
+ size:0x0,
+ },
+};
+
+#define DANUBE_FLASH_START 0x10000000
+#define DANUBE_FLASH_MAX 0x2000000
+
+int
+find_uImage_size (unsigned long start_offset){
+ unsigned long temp;
+
+ danube_copy_from(&danube_map, &temp, start_offset + 12, 4);
+ printk("kernel size is %ld \n", temp + 0x40);
+ return temp + 0x40;
+}
+
+int
+detect_squashfs_partition (unsigned long start_offset){
+ unsigned long temp;
+
+ danube_copy_from(&danube_map, &temp, start_offset, 4);
+
+ return (temp == SQUASHFS_MAGIC);
+}
+
+int __init
+init_danube_mtd (void)
+{
+ struct mtd_info *danube_mtd = NULL;
+ struct mtd_partition *parts = NULL;
+ unsigned long uimage_size;
+
+ writel(0x1d7ff, DANUBE_EBU_BUSCON0);
+
+ danube_map.read = danube_read16;
+ danube_map.write = danube_write16;
+ danube_map.copy_from = danube_copy_from;
+ danube_map.copy_to = danube_copy_to;
+
+ danube_map.phys = DANUBE_FLASH_START;
+ danube_map.virt = ioremap_nocache(DANUBE_FLASH_START, DANUBE_FLASH_MAX);
+ danube_map.size = DANUBE_FLASH_MAX;
+ if (!danube_map.virt) {
+ printk(KERN_WARNING "Failed to ioremap!\n");
+ return -EIO;
+ }
+
+ danube_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &danube_map);
+ if (!danube_mtd) {
+ iounmap(danube_map.virt);
+ printk("probing failed\n");
+ return -ENXIO;
+ }
+
+ danube_mtd->owner = THIS_MODULE;
+
+ uimage_size = find_uImage_size(danube_partitions[2].offset);
+
+ if(detect_squashfs_partition(danube_partitions[2].offset + uimage_size)){
+ printk("Found a squashfs following the uImage\n");
+ } else {
+ uimage_size &= ~0xffff;
+ uimage_size += 0x10000;
+ }
+
+ danube_partitions[2].size = uimage_size;
+ danube_partitions[3].offset = danube_partitions[2].offset + danube_partitions[2].size;
+ danube_partitions[3].size = ((danube_mtd->size >> 20) * 1024 * 1024) - danube_partitions[3].offset;
+
+ parts = &danube_partitions[0];
+ add_mtd_partitions(danube_mtd, parts, 4);
+
+ printk("Added danube flash with %dMB\n", danube_mtd->size >> 20);
+ return 0;
+}
+
+static void
+__exit
+cleanup_danube_mtd (void)
+{
+}
+
+module_init (init_danube_mtd);
+module_exit (cleanup_danube_mtd);
+
+MODULE_LICENSE ("GPL");
+MODULE_AUTHOR ("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION ("MTD map driver for DANUBE boards");