LASAT board mtd support

[Brian Murphy <brian@murphy.dk>]

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Please find attached a patch to add mtd support for the Lasat
platforms. Patch applies to the 2.4 CVS branch.

/Brian

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--- drivers/mtd/maps/Config.in	2002/06/26 22:35:49	1.3.2.3
+++ drivers/mtd/maps/Config.in	2002/07/02 18:46:45
@@ -57,6 +57,7 @@
       int '    Bus width in octets' CONFIG_MTD_CSTM_MIPS_IXX_BUSWIDTH 2
    fi
    dep_tristate '  Momenco Ocelot boot flash device' CONFIG_MTD_OCELOT $CONFIG_MOMENCO_OCELOT
+   dep_tristate '  LASAT flash device' CONFIG_MTD_LASAT $CONFIG_MTD_CFI $CONFIG_LASAT
 fi
 
 if [ "$CONFIG_SUPERH" = "y" ]; then
--- drivers/mtd/maps/Makefile	2002/06/26 22:35:49	1.2.2.3
+++ drivers/mtd/maps/Makefile	2002/07/02 18:46:45
@@ -38,6 +38,7 @@
 obj-$(CONFIG_MTD_PCI)		+= pci.o
 obj-$(CONFIG_MTD_PB1000)        += pb1xxx-flash.o
 obj-$(CONFIG_MTD_PB1500)        += pb1xxx-flash.o
+obj-$(CONFIG_MTD_LASAT)     	+= lasat.o
 obj-$(CONFIG_MTD_AUTCPU12)	+= autcpu12-nvram.o
 
 include $(TOPDIR)/Rules.make

--- /dev/null	Sun Apr 14 10:11:55 2002
+++ drivers/mtd/maps/lasat.c	Wed May 29 13:20:24 2002
@@ -0,0 +1,136 @@
+/*
+ * Flash device on lasat 100 and 200 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>
+#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 volatile unsigned int *wpreg = (void *)(LASAT_FLASHWP_REG);
+
+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
+};
+
+/* partition_info gives details on the logical partitions that the split the 
+ * single flash device into. If the size if zero we use up to the end of the
+ * device. */
+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");
+	*wpreg |= LASAT_FLASHWP_DIS;
+
+	sp_map.map_priv_1 = 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 = 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");