patch-2.4.6 linux/drivers/mtd/maps/cfi_flagadm.c
Next file: linux/drivers/mtd/maps/cstm_mips_ixx.c
Previous file: linux/drivers/mtd/maps/Makefile
Back to the patch index
Back to the overall index
- Lines: 185
- Date:
Tue Jun 12 10:30:27 2001
- Orig file:
v2.4.5/linux/drivers/mtd/maps/cfi_flagadm.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/cfi_flagadm.c linux/drivers/mtd/maps/cfi_flagadm.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright © 2001 Flaga hf. Medical Devices, Kári Davíđsson <kd@flaga.is>
+ *
+ * $Id: cfi_flagadm.c,v 1.5 2001/05/29 15:47:49 kd Exp $
+ *
+ * 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 <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 firts 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
+
+__u8 flagadm_read8(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readb(map->map_priv_1 + ofs);
+}
+
+__u16 flagadm_read16(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readw(map->map_priv_1 + ofs);
+}
+
+__u32 flagadm_read32(struct map_info *map, unsigned long ofs)
+{
+ return __raw_readl(map->map_priv_1 + ofs);
+}
+
+void flagadm_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+ memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void flagadm_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+ __raw_writeb(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void flagadm_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+ __raw_writew(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void flagadm_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+ __raw_writel(d, map->map_priv_1 + adr);
+ mb();
+}
+
+void flagadm_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+ memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+struct map_info flagadm_map = {
+ name: "FlagaDM flash device",
+ size: FLASH_SIZE,
+ buswidth: 2,
+ read8: flagadm_read8,
+ read16: flagadm_read16,
+ read32: flagadm_read32,
+ copy_from: flagadm_copy_from,
+ write8: flagadm_write8,
+ write16: flagadm_write16,
+ write32: flagadm_write32,
+ copy_to: flagadm_copy_to
+};
+
+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 : "Persistant storage",
+ offset : FLASH_PARTITION3_ADDR,
+ size : FLASH_PARTITION3_SIZE
+ }
+};
+
+#define PARTITION_COUNT (sizeof(flagadm_parts)/sizeof(struct mtd_partition))
+
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define init_flagadm init_module
+#define cleanup_flagadm cleanup_module
+#endif
+
+static struct mtd_info *mymtd;
+
+int __init init_flagadm(void)
+{
+ printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n",
+ FLASH_SIZE, FLASH_PHYS_ADDR);
+
+ flagadm_map.map_priv_1 = (unsigned long)ioremap(FLASH_PHYS_ADDR,
+ FLASH_SIZE);
+
+ if (!flagadm_map.map_priv_1) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+ mymtd = do_map_probe("cfi", &flagadm_map);
+ if (mymtd) {
+ mymtd->module = THIS_MODULE;
+ add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT);
+ printk(KERN_NOTICE "FlagaDM flash device initialized\n");
+ return 0;
+ }
+
+ iounmap((void *)flagadm_map.map_priv_1);
+ return -ENXIO;
+}
+
+static void __exit cleanup_flagadm(void)
+{
+ if (mymtd) {
+ del_mtd_partitions(mymtd);
+ map_destroy(mymtd);
+ }
+ if (flagadm_map.map_priv_1) {
+ iounmap((void *)flagadm_map.map_priv_1);
+ flagadm_map.map_priv_1 = 0;
+ }
+}
+
+module_init(init_flagadm);
+module_exit(cleanup_flagadm);
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)