patch-2.4.21 linux-2.4.21/drivers/mtd/maps/lasat.c

• Lines: 141
• Date: 2003-06-13 07:51:34.000000000 -0700
• Orig file: linux-2.4.20/drivers/mtd/maps/lasat.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/mtd/maps/lasat.c linux-2.4.21/drivers/mtd/maps/lasat.c
@@ -0,0 +1,140 @@
+/*
+ * Flash device on lasat 100 and 200 boards
+ *
+ * Presumably (C) 2002 Brian Murphy <brian@murphy.dk> or whoever he
+ * works for.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * $Id: lasat.c,v 1.1 2003/01/24 14:26:38 dwmw2 Exp $
+ *
+ */
+
+#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>
+#include <linux/mtd/partitions.h>
+#include <linux/config.h>
+#include <asm/lasat/lasat.h>
+#include <asm/lasat/lasat_mtd.h>
+
+static struct mtd_info *mymtd;
+
+static __u8 sp_read8(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readb(map->map_priv_1 + ofs);
+}
+
+static __u16 sp_read16(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readw(map->map_priv_1 + ofs);
+}
+
+static __u32 sp_read32(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readl(map->map_priv_1 + ofs);
+}
+
+static void sp_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+static void sp_write8(struct map_info *map, __u8 d, unsigned long adr)
+{
+	__raw_writeb(d, map->map_priv_1 + adr);
+	mb();
+}
+
+static void sp_write16(struct map_info *map, __u16 d, unsigned long adr)
+{
+	__raw_writew(d, map->map_priv_1 + adr);
+	mb();
+}
+
+static void sp_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	__raw_writel(d, map->map_priv_1 + adr);
+	mb();
+}
+
+static void sp_copy_to(struct map_info *map, unsigned long to, const void *from, ssize_t len)
+{
+	memcpy_toio(map->map_priv_1 + to, from, len);
+}
+
+static struct map_info sp_map = {
+	.name = "SP flash",
+	.buswidth = 4,
+	.read8 = sp_read8,
+	.read16 = sp_read16,
+	.read32 = sp_read32,
+	.copy_from = sp_copy_from,
+	.write8 = sp_write8,
+	.write16 = sp_write16,
+	.write32 = sp_write32,
+	.copy_to = sp_copy_to
+};
+
+static struct mtd_partition partition_info[LASAT_MTD_LAST];
+static char *lasat_mtd_partnames[] = {"Bootloader", "Service", "Normal", "Filesystem", "Config"};
+
+static int __init init_sp(void)
+{
+	int i;
+	/* this does not play well with the old flash code which 
+	 * protects and uprotects the flash when necessary */
+       	printk(KERN_NOTICE "Unprotecting flash\n");
+	*lasat_misc->flash_wp_reg |= 1 << lasat_misc->flash_wp_bit;
+
+	sp_map.map_priv_1 = lasat_flash_partition_start(LASAT_MTD_BOOTLOADER);
+	sp_map.size = lasat_board_info.li_flash_size;
+
+       	printk(KERN_NOTICE "sp flash device: %lx at %lx\n", 
+			sp_map.size, sp_map.map_priv_1);
+
+	for (i=0; i < LASAT_MTD_LAST; i++)
+		partition_info[i].name = lasat_mtd_partnames[i];
+
+	mymtd = do_map_probe("cfi_probe", &sp_map);
+	if (mymtd) {
+		u32 size, offset = 0;
+
+		mymtd->module = THIS_MODULE;
+
+		for (i=0; i < LASAT_MTD_LAST; i++) {
+			size = lasat_flash_partition_size(i);
+			partition_info[i].size = size;
+			partition_info[i].offset = offset;
+			offset += size;
+		}
+
+		add_mtd_partitions( mymtd, partition_info, LASAT_MTD_LAST );
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void __exit cleanup_sp(void)
+{
+	if (mymtd) {
+		del_mtd_partitions(mymtd);
+		map_destroy(mymtd);
+	}
+	if (sp_map.map_priv_1) {
+		sp_map.map_priv_1 = 0;
+	}
+}
+
+module_init(init_sp);
+module_exit(cleanup_sp);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Brian Murphy <brian@murphy.dk>");
+MODULE_DESCRIPTION("Lasat Safepipe/Masquerade MTD map driver");