Please find attached a patch to add mtd support for the Lasat
platforms. Patch applies to the 2.4 CVS branch.
/Brian
--- 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");
