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LASAT board mtd support

To: linux-mips <linux-mips@oss.sgi.com>
Subject: LASAT board mtd support
From: Brian Murphy <brian@murphy.dk>
Date: Tue, 02 Jul 2002 22:10:18 +0200
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.9) Gecko/20020412 Debian/0.9.9-6
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");
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