patch-2.4.6 linux/drivers/mtd/maps/pnc2000.c

• Lines: 137
• Date: Tue Jun 12 10:30:27 2001
• Orig file: v2.4.5/linux/drivers/mtd/maps/pnc2000.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/mtd/maps/pnc2000.c linux/drivers/mtd/maps/pnc2000.c
@@ -0,0 +1,136 @@
+/*
+ *	pnc2000.c - mapper for Photron PNC-2000 board.
+ *
+ * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
+ *
+ * This code is GPL
+ *
+ * $Id: pnc2000.c,v 1.8 2001/06/10 00:09:45 dwmw2 Exp $
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+
+#define WINDOW_ADDR 0xbf000000
+#define WINDOW_SIZE 0x00400000
+
+/* 
+ * MAP DRIVER STUFF
+ */
+
+__u8 pnc_read8(struct map_info *map, unsigned long ofs)
+{
+  return *(__u8 *)(WINDOW_ADDR + ofs);
+}
+
+__u16 pnc_read16(struct map_info *map, unsigned long ofs)
+{
+  return *(__u16 *)(WINDOW_ADDR + ofs);
+}
+
+__u32 pnc_read32(struct map_info *map, unsigned long ofs)
+{
+  return *(volatile unsigned int *)(WINDOW_ADDR + ofs);
+}
+
+void pnc_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+  memcpy(to, (void *)(WINDOW_ADDR + from), len);
+}
+
+void pnc_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+  *(__u8 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+  *(__u16 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+  *(__u32 *)(WINDOW_ADDR + adr) = d;
+}
+
+void pnc_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+  memcpy((void *)(WINDOW_ADDR + to), from, len);
+}
+
+struct map_info pnc_map = {
+	name: "PNC-2000",
+	size: WINDOW_SIZE,
+	buswidth: 4,
+	read8: pnc_read8,
+	read16: pnc_read16,
+	read32: pnc_read32,
+	copy_from: pnc_copy_from,
+	write8: pnc_write8,
+	write16: pnc_write16,
+	write32: pnc_write32,
+	copy_to: pnc_copy_to
+};
+
+
+/*
+ * MTD 'PARTITIONING' STUFF 
+ */
+static struct mtd_partition pnc_partitions[3] = {
+	{
+		name: "PNC-2000 boot firmware",
+		size: 0x20000,
+		offset: 0
+	},
+	{
+		name: "PNC-2000 kernel",
+		size: 0x1a0000,
+		offset: 0x20000
+	},
+	{
+		name: "PNC-2000 filesystem",
+		size: 0x240000,
+		offset: 0x1c0000
+	}
+};
+
+/* 
+ * This is the master MTD device for which all the others are just
+ * auto-relocating aliases.
+ */
+static struct mtd_info *mymtd;
+
+#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
+#define init_pnc2000 init_module
+#define cleanup_pnc2000 cleanup_module
+#endif
+
+int __init init_pnc2000(void)
+{
+	printk(KERN_NOTICE "Photron PNC-2000 flash mapping: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
+
+	mymtd = do_map_probe("cfi", &pnc_map);
+	if (mymtd) {
+		mymtd->module = THIS_MODULE;
+		return add_mtd_partitions(mymtd, pnc_partitions, 3);
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_pnc2000(void)
+{
+	if (mymtd) {
+		del_mtd_partitions(mymtd);
+		map_destroy(mymtd);
+	}
+}
+
+module_init(init_pnc2000);
+module_exit(cleanup_pnc2000);