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Message-ID: <20071116134100.3823.12894.stgit@warthog.procyon.org.uk>
Date: Fri, 16 Nov 2007 13:41:00 +0000
From: David Howells <dhowells@...hat.com>
To: torvalds@...l.org, akpm@...ux-foundation.org, dwmw2@...radead.org
Cc: linux-kernel@...r.kernel.org, linux-am33-list@...hat.com,
dhowells@...hat.com
Subject: [PATCH 1/2] MN10300: Add platform MTD support for the ASB2303 board
Add platform MTD support for the ASB2303 board.
Signed-off-by: David Howells <dhowells@...hat.com>
---
arch/mn10300/configs/asb2303_defconfig | 5 +-
arch/mn10300/unit-asb2303/Makefile | 2 -
arch/mn10300/unit-asb2303/flash.c | 100 ++++++++++++++++++++++++++++++++
3 files changed, 105 insertions(+), 2 deletions(-)
diff --git a/arch/mn10300/configs/asb2303_defconfig b/arch/mn10300/configs/asb2303_defconfig
index 0189a05..ca9876a 100644
--- a/arch/mn10300/configs/asb2303_defconfig
+++ b/arch/mn10300/configs/asb2303_defconfig
@@ -282,7 +282,10 @@ CONFIG_MTD_CFI_UTIL=y
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
-# CONFIG_MTD_PHYSMAP is not set
+CONFIG_MTD_PHYSMAP=y
+CONFIG_MTD_PHYSMAP_START=0x8000000
+CONFIG_MTD_PHYSMAP_LEN=0x0
+CONFIG_MTD_PHYSMAP_BANKWIDTH=2
# CONFIG_MTD_PLATRAM is not set
#
diff --git a/arch/mn10300/unit-asb2303/Makefile b/arch/mn10300/unit-asb2303/Makefile
index 03e579f..38a5bb4 100644
--- a/arch/mn10300/unit-asb2303/Makefile
+++ b/arch/mn10300/unit-asb2303/Makefile
@@ -3,4 +3,4 @@
# Makefile for the ASB2303 board
#
###############################################################################
-obj-y := unit-init.o smc91111.o leds.o
+obj-y := unit-init.o smc91111.o flash.o leds.o
diff --git a/arch/mn10300/unit-asb2303/flash.c b/arch/mn10300/unit-asb2303/flash.c
new file mode 100644
index 0000000..17fe083
--- /dev/null
+++ b/arch/mn10300/unit-asb2303/flash.c
@@ -0,0 +1,100 @@
+/* Handle mapping of the flash on the ASB2303 board
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@...hat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+#define ASB2303_PROM_ADDR 0xA0000000 /* Boot PROM */
+#define ASB2303_PROM_SIZE (2 * 1024 * 1024)
+#define ASB2303_FLASH_ADDR 0xA4000000 /* System Flash */
+#define ASB2303_FLASH_SIZE (32 * 1024 * 1024)
+#define ASB2303_CONFIG_ADDR 0xA6000000 /* System Config EEPROM */
+#define ASB2303_CONFIG_SIZE (8 * 1024)
+
+/*
+ * default MTD partition table for both main flash devices, expected to be
+ * overridden by RedBoot
+ */
+static struct mtd_partition asb2303_partitions[] = {
+ {
+ .name = "Bootloader",
+ .size = 0x00040000,
+ .offset = 0,
+ .mask_flags = MTD_CAP_ROM /* force read-only */
+ }, {
+ .name = "Kernel",
+ .size = 0x00400000,
+ .offset = 0x00040000,
+ }, {
+ .name = "Filesystem",
+ .size = MTDPART_SIZ_FULL,
+ .offset = 0x00440000
+ }
+};
+
+/*
+ * the ASB2303 Boot PROM definition
+ */
+static struct physmap_flash_data asb2303_bootprom_data = {
+ .width = 2,
+ .nr_parts = 1,
+ .parts = asb2303_partitions,
+};
+
+static struct resource asb2303_bootprom_resource = {
+ .start = ASB2303_PROM_ADDR,
+ .end = ASB2303_PROM_ADDR + ASB2303_PROM_SIZE,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device asb2303_bootprom = {
+ .name = "physmap-flash",
+ .id = 0,
+ .dev.platform_data = &asb2303_bootprom_data,
+ .num_resources = 1,
+ .resource = &asb2303_bootprom_resource,
+};
+
+/*
+ * the ASB2303 System Flash definition
+ */
+static struct physmap_flash_data asb2303_sysflash_data = {
+ .width = 4,
+ .nr_parts = 1,
+ .parts = asb2303_partitions,
+};
+
+static struct resource asb2303_sysflash_resource = {
+ .start = ASB2303_FLASH_ADDR,
+ .end = ASB2303_FLASH_ADDR + ASB2303_FLASH_SIZE,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device asb2303_sysflash = {
+ .name = "physmap-flash",
+ .id = 1,
+ .dev.platform_data = &asb2303_sysflash_data,
+ .num_resources = 1,
+ .resource = &asb2303_sysflash_resource,
+};
+
+/*
+ * register the ASB2303 flashes
+ */
+static int __init asb2303_mtd_init(void)
+{
+ platform_device_register(&asb2303_bootprom);
+ platform_device_register(&asb2303_sysflash);
+ return 0;
+}
+
+module_init(asb2303_mtd_init);
-
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