patch-2.4.6 linux/drivers/mtd/maps/cfi_flagadm.c

• 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);