[linuxsh-dev] MTD for Solution Engine

[NIIBE Y. <gn...@m1...>]

I've got this from David Woodhouse, the maintainer of Memory
Technology Device.

This is quite useful to hack IPL.  Why don't we port eCos to
SolutionEngine!  I'll commit this soon.

2001-08-10  David Woodhouse  <dw...@in...>

	* drivers/mtd/maps/solutionengine.c: Map driver for flash chips
	and PROM on Solution Engine and similar boards.
	* drivers/mtd/maps/Config.in: Appropriate magic.
	* drivers/mtd/maps/Makefile: Ditto.

Index: drivers/mtd/maps/Makefile
===================================================================
RCS file: /cvsroot/linuxsh/kernel/drivers/mtd/maps/Makefile,v
retrieving revision 1.1
diff -u -r1.1 Makefile
--- drivers/mtd/maps/Makefile	2001/06/19 08:14:54	1.1
+++ drivers/mtd/maps/Makefile	2001/07/04 13:57:36
@@ -25,5 +25,6 @@
 obj-$(CONFIG_MTD_VMAX)		+= vmax301.o
 obj-$(CONFIG_MTD_DBOX2)		+= dbox2-flash.o
 obj-$(CONFIG_MTD_OCELOT)	+= ocelot.o
+obj-$(CONFIG_MTD_SOLUTIONENGINE)+= solutionengine.o
 
 include $(TOPDIR)/Rules.make
Index: drivers/mtd/maps/Config.in
===================================================================
RCS file: /cvsroot/linuxsh/kernel/drivers/mtd/maps/Config.in,v
retrieving revision 1.1
diff -u -r1.1 Config.in
--- drivers/mtd/maps/Config.in	2001/06/19 08:14:54	1.1
+++ drivers/mtd/maps/Config.in	2001/07/04 13:57:36
@@ -38,4 +38,5 @@
 dep_tristate '  JEDEC Flash device mapped on Octagon 5066 SBC' CONFIG_MTD_OCTAGON $CONFIG_MTD_JEDEC
 dep_tristate '  JEDEC Flash device mapped on Tempustech VMAX SBC301' CONFIG_MTD_VMAX $CONFIG_MTD_JEDEC
 dep_tristate '  Momenco Ocelot boot flash device' CONFIG_MTD_OCELOT $CONFIG_MOMENCO_OCELOT
+dep_tristate '  CFI Flash device mapped on Hitachi SolutionEngine' CONFIG_MTD_SOLUTIONENGINE $CONFIG_MTD_CFI $CONFIG_SH $CONFIG_MTD_REDBOOT_PARTS
 endmenu
--- /dev/null	Sat Mar 24 04:37:44 2001
+++ drivers/mtd/maps/solutionengine.c	Wed Jul  4 14:05:20 2001
@@ -0,0 +1,119 @@
+/*
+ * $Id: solutionengine.c,v 1.1 2001/06/19 09:47:11 dwmw2 Exp $
+ *
+ * Flash and EPROM on Hitachi Solution Engine and similar boards.
+ *
+ * (C) 2001 Red Hat, Inc.
+ *
+ * GPL'd
+ */
+
+#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>
+
+
+extern int parse_redboot_partitions(struct mtd_info *master, struct mtd_partition **pparts);
+
+__u32 soleng_read32(struct map_info *map, unsigned long ofs)
+{
+	return __raw_readl(map->map_priv_1 + ofs);
+}
+
+void soleng_write32(struct map_info *map, __u32 d, unsigned long adr)
+{
+	__raw_writel(d, map->map_priv_1 + adr);
+	mb();
+}
+
+void soleng_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
+{
+	memcpy_fromio(to, map->map_priv_1 + from, len);
+}
+
+
+static struct mtd_info *flash_mtd;
+static struct mtd_info *eprom_mtd;
+
+static struct mtd_partition *parsed_parts;
+
+struct map_info soleng_eprom_map = {
+	name: "Solution Engine EPROM",
+	size: 0x400000,
+	buswidth: 4,
+	copy_from: soleng_copy_from,
+};
+
+struct map_info soleng_flash_map = {
+	name: "Solution Engine FLASH",
+	size: 0x400000,
+	buswidth: 4,
+	read32: soleng_read32,
+	copy_from: soleng_copy_from,
+	write32: soleng_write32,
+};
+
+static int __init init_soleng_maps(void)
+{
+	int nr_parts;
+
+	/* First probe at offset 0 */
+	soleng_flash_map.map_priv_1 = P2SEGADDR(0);
+	soleng_eprom_map.map_priv_1 = P1SEGADDR(0x400000);
+
+	printk(KERN_NOTICE "Probing for flash chips at 0x000000:\n");
+	flash_mtd = do_map_probe("cfi", &soleng_flash_map);
+	if (!flash_mtd) {
+		/* Not there. Try swapping */
+		printk(KERN_NOTICE "Probing for flash chips at 0x400000:\n");
+		soleng_flash_map.map_priv_1 = P2SEGADDR(0x400000);
+		soleng_eprom_map.map_priv_1 = P1SEGADDR(0);
+		flash_mtd = do_map_probe("cfi", &soleng_flash_map);
+		if (!flash_mtd) {
+			/* Eep. */
+			printk(KERN_NOTICE "Flash chips not detected at either possible location.\n");
+			return -ENXIO;
+		}
+	}
+	printk(KERN_NOTICE "Solution Engine: Flash at 0x%08lx, EPROM at 0x%08lx\n",
+	       soleng_flash_map.map_priv_1 & 0x1fffffff,
+	       soleng_eprom_map.map_priv_1 & 0x1fffffff);
+	flash_mtd->module = THIS_MODULE;
+
+	eprom_mtd = do_map_probe("rom", &soleng_eprom_map);
+	if (eprom_mtd) {
+		eprom_mtd->module = THIS_MODULE;
+		add_mtd_device(eprom_mtd);
+	}
+
+	nr_parts = parse_redboot_partitions(flash_mtd, &parsed_parts);
+
+	if (nr_parts)
+		add_mtd_partitions(flash_mtd, parsed_parts, nr_parts);
+	else
+		add_mtd_device(flash_mtd);
+
+	return 0;
+}
+
+static void __exit cleanup_soleng_maps(void)
+{
+	if (eprom_mtd) {
+		del_mtd_device(eprom_mtd);
+		map_destroy(eprom_mtd);
+	}
+
+	if (parsed_parts)
+		del_mtd_partitions(flash_mtd);
+	else
+		del_mtd_device(flash_mtd);
+	map_destroy(flash_mtd);
+}
+
+module_init(init_soleng_maps);
+module_exit(cleanup_soleng_maps);
+

--
dwmw2