patch-2.4.0-test3 linux/drivers/mtd/physmap.c

• Lines: 115
• Date: Tue Jul 4 10:10:05 2000
• Orig file: v2.4.0-test2/linux/drivers/mtd/physmap.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.0-test2/linux/drivers/mtd/physmap.c linux/drivers/mtd/physmap.c
@@ -0,0 +1,114 @@
+/*
+ * $Id: physmap.c,v 1.1 2000/07/04 08:58:10 dwmw2 Exp $
+ *
+ * Normal mappings of chips in physical memory
+ */
+
+#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>
+
+
+#define WINDOW_ADDR 0x8000000
+#define WINDOW_SIZE 0x4000000
+
+static struct mtd_info *mymtd;
+
+__u8 physmap_read8(struct map_info *map, unsigned long ofs)
+{
+	return readb(map->map_priv_1 + ofs);
+}
+
+__u16 physmap_read16(struct map_info *map, unsigned long ofs)
+{
+	return readw(map->map_priv_1 + ofs);
+}
+
+__u32 physmap_read32(struct map_info *map, unsigned long ofs)
+{
+	return readl(map->map_priv_1 + ofs);
+}
+
+void physmap_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+void physmap_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	writeb(d, map->map_priv_1 + adr);
+}
+
+void physmap_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	writew(d, map->map_priv_1 + adr);
+}
+
+void physmap_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	writel(d, map->map_priv_1 + adr);
+}
+
+void physmap_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 physmap_map = {
+	"Physically mapped flash",
+	WINDOW_SIZE,
+	2,
+	physmap_read8,
+	physmap_read16,
+	physmap_read32,
+	physmap_copy_from,
+	physmap_write8,
+	physmap_write16,
+	physmap_write32,
+	physmap_copy_to,
+	0,
+	0
+};
+
+#if LINUX_VERSION_CODE < 0x20300
+#ifdef MODULE
+#define init_physmap init_module
+#define cleanup_physmap cleanup_module
+#endif
+#endif
+
+int __init init_physmap(void)
+{
+       	printk(KERN_NOTICE "physmap flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+	physmap_map.map_priv_1 = (unsigned long)ioremap(WINDOW_SIZE, WINDOW_ADDR);
+
+	if (!physmap_map.map_priv_1) {
+		printk("Failed to ioremap\n");
+		return -EIO;
+	}
+	mymtd = do_cfi_probe(&physmap_map);
+	if (mymtd) {
+#ifdef MODULE
+		mymtd->module = &__this_module;
+#endif
+		add_mtd_device(mymtd);
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_physmap(void)
+{
+	if (mymtd) {
+		del_mtd_device(mymtd);
+		map_destroy(mymtd);
+	}
+	if (physmap_map.map_priv_1) {
+		iounmap((void *)physmap_map.map_priv_1);
+		physmap_map.map_priv_1 = 0;
+	}
+}