patch-2.4.6 linux/drivers/mtd/maps/iq80310.c

• Lines: 134
• Date: Tue Jun 12 10:30:27 2001
• Orig file: v2.4.5/linux/drivers/mtd/maps/iq80310.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/iq80310.c linux/drivers/mtd/maps/iq80310.c
@@ -0,0 +1,133 @@
+/*
+ * $Id: iq80310.c,v 1.3 2001/04/26 15:40:23 dwmw2 Exp $
+ *
+ * Mapping for the Intel XScale IQ80310 evaluation board
+ *
+ * Author:	Nicolas Pitre
+ * Copyright:	(C) 2001 MontaVista Software Inc.
+ * 
+ * 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 	0
+#define WINDOW_SIZE 	8*1024*1024
+#define BUSWIDTH 	1
+
+static struct mtd_info *mymtd;
+
+static __u8 iq80310_read8(struct map_info *map, unsigned long ofs)
+{
+	return *(__u8 *)(map->map_priv_1 + ofs);
+}
+
+static __u16 iq80310_read16(struct map_info *map, unsigned long ofs)
+{
+	return *(__u16 *)(map->map_priv_1 + ofs);
+}
+
+static __u32 iq80310_read32(struct map_info *map, unsigned long ofs)
+{
+	return *(__u32 *)(map->map_priv_1 + ofs);
+}
+
+static void iq80310_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy(to, (void *)(map->map_priv_1 + from), len);
+}
+
+static void iq80310_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	*(__u8 *)(map->map_priv_1 + adr) = d;
+}
+
+static void iq80310_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	*(__u16 *)(map->map_priv_1 + adr) = d;
+}
+
+static void iq80310_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	*(__u32 *)(map->map_priv_1 + adr) = d;
+}
+
+static void iq80310_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy((void *)(map->map_priv_1 + to), from, len);
+}
+
+static struct map_info iq80310_map = {
+	name: "IQ80310 flash",
+	size: WINDOW_SIZE,
+	buswidth: BUSWIDTH,
+	read8:		iq80310_read8,
+	read16:		iq80310_read16,
+	read32:		iq80310_read32,
+	copy_from:	iq80310_copy_from,
+	write8:		iq80310_write8,
+	write16:	iq80310_write16,
+	write32:	iq80310_write32,
+	copy_to:	iq80310_copy_to
+};
+
+static struct mtd_partition iq80310_partitions[3] = {
+	{
+		name:		"firmware",
+		size:		0x00080000,
+		offset:		0,
+		mask_flags:	MTD_WRITEABLE  /* force read-only */
+	},{
+		name:		"kernel",
+		size:		0x00080000,
+		offset:		0x00080000,
+	},{
+		name:		"filesystem",
+		size:		0x00700000,
+		offset:		0x00100000
+	}
+};
+
+static int __init init_iq80310(void)
+{
+	iq80310_map.map_priv_1 = (unsigned long)__ioremap(WINDOW_ADDR, WINDOW_SIZE, 0);
+
+	if (!iq80310_map.map_priv_1) {
+		printk("Failed to ioremap\n");
+		return -EIO;
+	}
+	mymtd = do_map_probe("cfi", &iq80310_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		add_mtd_partitions(mymtd, iq80310_partitions, 3);
+		return 0;
+	}
+
+	iounmap((void *)iq80310_map.map_priv_1);
+	return -ENXIO;
+}
+
+static void __exit cleanup_iq80310(void)
+{
+	if (mymtd) {
+		del_mtd_partitions(mymtd);
+		map_destroy(mymtd);
+	}
+	if (iq80310_map.map_priv_1) {
+		iounmap((void *)iq80310_map.map_priv_1);
+		iq80310_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_iq80310);
+module_exit(cleanup_iq80310);
+