1 files changed, 127 insertions, 0 deletions
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
new file mode 100644
index 00000000000..811d92e5f5b
--- /dev/null
+++ b/drivers/mtd/maps/uclinux.c
@@ -0,0 +1,127 @@
+/****************************************************************************/
+
+/*
+ *	uclinux.c -- generic memory mapped MTD driver for uclinux
+ *
+ *	(C) Copyright 2002, Greg Ungerer (gerg@snapgear.com)
+ *
+ * 	$Id: uclinux.c,v 1.10 2005/01/05 18:05:13 dwmw2 Exp $
+ */
+
+/****************************************************************************/
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/major.h>
+#include <linux/root_dev.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+
+/****************************************************************************/
+
+
+/****************************************************************************/
+
+struct map_info uclinux_ram_map = {
+	.name = "RAM",
+};
+
+struct mtd_info *uclinux_ram_mtdinfo;
+
+/****************************************************************************/
+
+struct mtd_partition uclinux_romfs[] = {
+	{ .name = "ROMfs" }
+};
+
+#define	NUM_PARTITIONS	(sizeof(uclinux_romfs) / sizeof(uclinux_romfs[0]))
+
+/****************************************************************************/
+
+int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, u_char **mtdbuf)
+{
+	struct map_info *map = mtd->priv;
+	*mtdbuf = (u_char *) (map->virt + ((int) from));
+	*retlen = len;
+	return(0);
+}
+
+/****************************************************************************/
+
+int __init uclinux_mtd_init(void)
+{
+	struct mtd_info *mtd;
+	struct map_info *mapp;
+	extern char _ebss;
+
+	mapp = &uclinux_ram_map;
+	mapp->phys = (unsigned long) &_ebss;
+	mapp->size = PAGE_ALIGN(*((unsigned long *)((&_ebss) + 8)));
+	mapp->bankwidth = 4;
+
+	printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n",
+	       	(int) mapp->map_priv_2, (int) mapp->size);
+
+	mapp->virt = ioremap_nocache(mapp->phys, mapp->size);
+
+	if (mapp->virt == 0) {
+		printk("uclinux[mtd]: ioremap_nocache() failed\n");
+		return(-EIO);
+	}
+
+	simple_map_init(mapp);
+
+	mtd = do_map_probe("map_ram", mapp);
+	if (!mtd) {
+		printk("uclinux[mtd]: failed to find a mapping?\n");
+		iounmap(mapp->virt);
+		return(-ENXIO);
+	}
+		
+	mtd->owner = THIS_MODULE;
+	mtd->point = uclinux_point;
+	mtd->priv = mapp;
+
+	uclinux_ram_mtdinfo = mtd;
+	add_mtd_partitions(mtd, uclinux_romfs, NUM_PARTITIONS);
+
+	printk("uclinux[mtd]: set %s to be root filesystem\n",
+	     	uclinux_romfs[0].name);
+	ROOT_DEV = MKDEV(MTD_BLOCK_MAJOR, 0);
+	put_mtd_device(mtd);
+
+	return(0);
+}
+
+/****************************************************************************/
+
+void __exit uclinux_mtd_cleanup(void)
+{
+	if (uclinux_ram_mtdinfo) {
+		del_mtd_partitions(uclinux_ram_mtdinfo);
+		map_destroy(uclinux_ram_mtdinfo);
+		uclinux_ram_mtdinfo = NULL;
+	}
+	if (uclinux_ram_map.map_priv_1) {
+		iounmap((void *) uclinux_ram_map.virt);
+		uclinux_ram_map.virt = 0;
+	}
+}
+
+/****************************************************************************/
+
+module_init(uclinux_mtd_init);
+module_exit(uclinux_mtd_cleanup);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Greg Ungerer <gerg@snapgear.com>");
+MODULE_DESCRIPTION("Generic RAM based MTD for uClinux");
+
+/****************************************************************************/