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path: root/drivers/mtd/maps/cfi_flagadm.c
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Diffstat (limited to 'drivers/mtd/maps/cfi_flagadm.c')
-rw-r--r--drivers/mtd/maps/cfi_flagadm.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/mtd/maps/cfi_flagadm.c b/drivers/mtd/maps/cfi_flagadm.c
new file mode 100644
index 000000000..d504b3d17
--- /dev/null
+++ b/drivers/mtd/maps/cfi_flagadm.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright © 2001 Flaga hf. Medical Devices, Kári Davíðsson <kd@flaga.is>
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+
+/* We split the flash chip up into four parts.
+ * 1: bootloader first 128k (0x00000000 - 0x0001FFFF) size 0x020000
+ * 2: kernel 640k (0x00020000 - 0x000BFFFF) size 0x0A0000
+ * 3: compressed 1536k root ramdisk (0x000C0000 - 0x0023FFFF) size 0x180000
+ * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000
+ */
+
+#define FLASH_PHYS_ADDR 0x40000000
+#define FLASH_SIZE 0x400000
+
+#define FLASH_PARTITION0_ADDR 0x00000000
+#define FLASH_PARTITION0_SIZE 0x00020000
+
+#define FLASH_PARTITION1_ADDR 0x00020000
+#define FLASH_PARTITION1_SIZE 0x000A0000
+
+#define FLASH_PARTITION2_ADDR 0x000C0000
+#define FLASH_PARTITION2_SIZE 0x00180000
+
+#define FLASH_PARTITION3_ADDR 0x00240000
+#define FLASH_PARTITION3_SIZE 0x001C0000
+
+
+static struct map_info flagadm_map = {
+ .name = "FlagaDM flash device",
+ .size = FLASH_SIZE,
+ .bankwidth = 2,
+};
+
+static struct mtd_partition flagadm_parts[] = {
+ {
+ .name = "Bootloader",
+ .offset = FLASH_PARTITION0_ADDR,
+ .size = FLASH_PARTITION0_SIZE
+ },
+ {
+ .name = "Kernel image",
+ .offset = FLASH_PARTITION1_ADDR,
+ .size = FLASH_PARTITION1_SIZE
+ },
+ {
+ .name = "Initial ramdisk image",
+ .offset = FLASH_PARTITION2_ADDR,
+ .size = FLASH_PARTITION2_SIZE
+ },
+ {
+ .name = "Persistent storage",
+ .offset = FLASH_PARTITION3_ADDR,
+ .size = FLASH_PARTITION3_SIZE
+ }
+};
+
+#define PARTITION_COUNT ARRAY_SIZE(flagadm_parts)
+
+static struct mtd_info *mymtd;
+
+static int __init init_flagadm(void)
+{
+ printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n",
+ FLASH_SIZE, FLASH_PHYS_ADDR);
+
+ flagadm_map.phys = FLASH_PHYS_ADDR;
+ flagadm_map.virt = ioremap(FLASH_PHYS_ADDR,
+ FLASH_SIZE);
+
+ if (!flagadm_map.virt) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+
+ simple_map_init(&flagadm_map);
+
+ mymtd = do_map_probe("cfi_probe", &flagadm_map);
+ if (mymtd) {
+ mymtd->owner = THIS_MODULE;
+ mtd_device_register(mymtd, flagadm_parts, PARTITION_COUNT);
+ printk(KERN_NOTICE "FlagaDM flash device initialized\n");
+ return 0;
+ }
+
+ iounmap((void __iomem *)flagadm_map.virt);
+ return -ENXIO;
+}
+
+static void __exit cleanup_flagadm(void)
+{
+ if (mymtd) {
+ mtd_device_unregister(mymtd);
+ map_destroy(mymtd);
+ }
+ if (flagadm_map.virt) {
+ iounmap((void __iomem *)flagadm_map.virt);
+ flagadm_map.virt = NULL;
+ }
+}
+
+module_init(init_flagadm);
+module_exit(cleanup_flagadm);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kári Davíðsson <kd@flaga.is>");
+MODULE_DESCRIPTION("MTD map driver for Flaga digital module");