patch-2.4.19 linux-2.4.19/drivers/mtd/maps/mbx860.c

• Lines: 145
• Date: Fri Aug 2 17:39:44 2002
• Orig file: linux-2.4.18/drivers/mtd/maps/mbx860.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/drivers/mtd/maps/mbx860.c linux-2.4.19/drivers/mtd/maps/mbx860.c
@@ -0,0 +1,144 @@
+/*
+ * $Id: mbx860.c,v 1.1 2001/11/18 19:43:09 dwmw2 Exp $
+ *
+ * Handle mapping of the flash on MBX860 boards
+ *
+ * Author:	Anton Todorov
+ * Copyright:	(C) 2001 Emness Technology
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#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>
+
+
+#define WINDOW_ADDR 0xfe000000
+#define WINDOW_SIZE 0x00200000
+
+/* Flash / Partition sizing */
+#define MAX_SIZE_KiB              8192
+#define BOOT_PARTITION_SIZE_KiB    512
+#define KERNEL_PARTITION_SIZE_KiB 5632
+#define APP_PARTITION_SIZE_KiB    2048
+
+#define NUM_PARTITIONS 3
+
+/* partition_info gives details on the logical partitions that the split the
+ * single flash device into. If the size if zero we use up to the end of the
+ * device. */
+static struct mtd_partition partition_info[]={
+	{ name: "MBX flash BOOT partition",
+	offset: 0,
+	size:   BOOT_PARTITION_SIZE_KiB*1024 },
+	{ name: "MBX flash DATA partition",
+	offset: BOOT_PARTITION_SIZE_KiB*1024,
+	size: (KERNEL_PARTITION_SIZE_KiB)*1024 },
+	{ name: "MBX flash APPLICATION partition",
+	offset: (BOOT_PARTITION_SIZE_KiB+KERNEL_PARTITION_SIZE_KiB)*1024 }
+};
+				   
+
+static struct mtd_info *mymtd;
+
+__u8 mbx_read8(struct map_info *map, unsigned long ofs)
+{
+	return readb(map->map_priv_1 + ofs);
+}
+
+__u16 mbx_read16(struct map_info *map, unsigned long ofs)
+{
+	return readw(map->map_priv_1 + ofs);
+}
+
+__u32 mbx_read32(struct map_info *map, unsigned long ofs)
+{
+	return readl(map->map_priv_1 + ofs);
+}
+
+void mbx_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, (void *)(map->map_priv_1 + from), len);
+}
+
+void mbx_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	writeb(d, map->map_priv_1 + adr);
+}
+
+void mbx_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	writew(d, map->map_priv_1 + adr);
+}
+
+void mbx_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	writel(d, map->map_priv_1 + adr);
+}
+
+void mbx_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy_toio((void *)(map->map_priv_1 + to), from, len);
+}
+
+struct map_info mbx_map = {
+	name: "MBX flash",
+	size: WINDOW_SIZE,
+	buswidth: 4,
+	read8: mbx_read8,
+	read16: mbx_read16,
+	read32: mbx_read32,
+	copy_from: mbx_copy_from,
+	write8: mbx_write8,
+	write16: mbx_write16,
+	write32: mbx_write32,
+	copy_to: mbx_copy_to
+};
+
+int __init init_mbx(void)
+{
+	printk(KERN_NOTICE "Motorola MBX flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
+	mbx_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
+
+	if (!mbx_map.map_priv_1) {
+		printk("Failed to ioremap\n");
+		return -EIO;
+	}
+	mymtd = do_map_probe("jedec_probe", &mbx_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		add_mtd_device(mymtd);
+                add_mtd_partitions(mymtd, partition_info, NUM_PARTITIONS);
+		return 0;
+	}
+
+	iounmap((void *)mbx_map.map_priv_1);
+	return -ENXIO;
+}
+
+static void __exit cleanup_mbx(void)
+{
+	if (mymtd) {
+		del_mtd_device(mymtd);
+		map_destroy(mymtd);
+	}
+	if (mbx_map.map_priv_1) {
+		iounmap((void *)mbx_map.map_priv_1);
+		mbx_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_mbx);
+module_exit(cleanup_mbx);
+
+MODULE_AUTHOR("Anton Todorov <a.todorov@emness.com>");
+MODULE_DESCRIPTION("MTD map driver for Motorola MBX860 board");
+MODULE_LICENSE("GPL");