1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/mtd/maps/uclinux.c b/drivers/mtd/maps/uclinux.c
new file mode 100644
index 00000000..cfff454f
--- /dev/null
+++ b/drivers/mtd/maps/uclinux.c
@@ -0,0 +1,121 @@
+/****************************************************************************/
+
+/*
+ *	uclinux.c -- generic memory mapped MTD driver for uclinux
+ *
+ *	(C) Copyright 2002, Greg Ungerer (gerg@snapgear.com)
+ */
+
+/****************************************************************************/
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/major.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <asm/io.h>
+
+/****************************************************************************/
+
+extern char _ebss;
+
+struct map_info uclinux_ram_map = {
+	.name = "RAM",
+	.phys = (unsigned long)&_ebss,
+	.size = 0,
+};
+
+static struct mtd_info *uclinux_ram_mtdinfo;
+
+/****************************************************************************/
+
+static struct mtd_partition uclinux_romfs[] = {
+	{ .name = "ROMfs" }
+};
+
+#define	NUM_PARTITIONS	ARRAY_SIZE(uclinux_romfs)
+
+/****************************************************************************/
+
+static int uclinux_point(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, void **virt, resource_size_t *phys)
+{
+	struct map_info *map = mtd->priv;
+	*virt = map->virt + from;
+	if (phys)
+		*phys = map->phys + from;
+	*retlen = len;
+	return(0);
+}
+
+/****************************************************************************/
+
+static int __init uclinux_mtd_init(void)
+{
+	struct mtd_info *mtd;
+	struct map_info *mapp;
+
+	mapp = &uclinux_ram_map;
+	if (!mapp->size)
+		mapp->size = PAGE_ALIGN(ntohl(*((unsigned long *)(mapp->phys + 8))));
+	mapp->bankwidth = 4;
+
+	printk("uclinux[mtd]: RAM probe address=0x%x size=0x%x\n",
+	       	(int) mapp->phys, (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;
+	mtd_device_register(mtd, uclinux_romfs, NUM_PARTITIONS);
+
+	return(0);
+}
+
+/****************************************************************************/
+
+static void __exit uclinux_mtd_cleanup(void)
+{
+	if (uclinux_ram_mtdinfo) {
+		mtd_device_unregister(uclinux_ram_mtdinfo);
+		map_destroy(uclinux_ram_mtdinfo);
+		uclinux_ram_mtdinfo = NULL;
+	}
+	if (uclinux_ram_map.virt) {
+		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");
+
+/****************************************************************************/