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

• Lines: 113
• Date: Tue Jun 12 10:30:27 2001
• Orig file: v2.4.5/linux/drivers/mtd/maps/rpxlite.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/rpxlite.c linux/drivers/mtd/maps/rpxlite.c
@@ -0,0 +1,112 @@
+/*
+ * $Id: rpxlite.c,v 1.12 2001/04/26 15:40:23 dwmw2 Exp $
+ *
+ * Handle mapping of the flash on the RPX Lite and CLLF boards
+ */
+
+#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 0xfe000000
+#define WINDOW_SIZE 0x800000
+
+static struct mtd_info *mymtd;
+
+__u8 rpxlite_read8(struct map_info *map, unsigned long ofs)
+{
+	return readb(map->map_priv_1 + ofs);
+}
+
+__u16 rpxlite_read16(struct map_info *map, unsigned long ofs)
+{
+	return readw(map->map_priv_1 + ofs);
+}
+
+__u32 rpxlite_read32(struct map_info *map, unsigned long ofs)
+{
+	return readl(map->map_priv_1 + ofs);
+}
+
+void rpxlite_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 rpxlite_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	writeb(d, map->map_priv_1 + adr);
+}
+
+void rpxlite_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	writew(d, map->map_priv_1 + adr);
+}
+
+void rpxlite_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	writel(d, map->map_priv_1 + adr);
+}
+
+void rpxlite_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 rpxlite_map = {
+	name: "RPX",
+	size: WINDOW_SIZE,
+	buswidth: 4,
+	read8: rpxlite_read8,
+	read16: rpxlite_read16,
+	read32: rpxlite_read32,
+	copy_from: rpxlite_copy_from,
+	write8: rpxlite_write8,
+	write16: rpxlite_write16,
+	write32: rpxlite_write32,
+	copy_to: rpxlite_copy_to
+};
+
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define init_rpxlite init_module
+#define cleanup_rpxlite cleanup_module
+#endif
+
+int __init init_rpxlite(void)
+{
+	printk(KERN_NOTICE "RPX Lite or CLLF flash device: %x at %x\n", WINDOW_SIZE*4, WINDOW_ADDR);
+	rpxlite_map.map_priv_1 = (unsigned long)ioremap(WINDOW_ADDR, WINDOW_SIZE * 4);
+
+	if (!rpxlite_map.map_priv_1) {
+		printk("Failed to ioremap\n");
+		return -EIO;
+	}
+	mymtd = do_map_probe("cfi", &rpxlite_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		add_mtd_device(mymtd);
+		return 0;
+	}
+
+	iounmap((void *)rpxlite_map.map_priv_1);
+	return -ENXIO;
+}
+
+static void __exit cleanup_rpxlite(void)
+{
+	if (mymtd) {
+		del_mtd_device(mymtd);
+		map_destroy(mymtd);
+	}
+	if (rpxlite_map.map_priv_1) {
+		iounmap((void *)rpxlite_map.map_priv_1);
+		rpxlite_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_rpxlite);
+module_exit(cleanup_rpxlite);