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From 116d99d9f45c30d3b1c80b54fed8bf406aa590f7 Mon Sep 17 00:00:00 2001
From: Matthieu Crapet <mcrapet@gmail.com>
Date: Sat, 19 Jun 2010 16:56:48 +0200
Subject: [PATCH 14/18] ts7200_nor_flash
Deal with 8mb or 16mb NOR Flash (TS-7200 only)
---
drivers/mtd/maps/Kconfig | 15 +++++
drivers/mtd/maps/Makefile | 1 +
drivers/mtd/maps/ts7200_flash.c | 116 +++++++++++++++++++++++++++++++++++++++
3 files changed, 132 insertions(+), 0 deletions(-)
create mode 100644 drivers/mtd/maps/ts7200_flash.c
diff --git a/drivers/mtd/maps/Kconfig b/drivers/mtd/maps/Kconfig
index aa2807d..5d12903 100644
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -422,6 +422,21 @@ config MTD_H720X
This enables access to the flash chips on the Hynix evaluation boards.
If you have such a board, say 'Y'.
+config MTD_TS7200_NOR
+ tristate "CFI Flash device mapped on TS-7200"
+ depends on MTD_CFI && MACH_TS72XX
+ help
+ This provides a map driver for the on-board flash of the Technologic
+ System's TS-7200 board. The 8MB (or 16MB) flash is splitted into 3 partitions
+ which are accessed as separate MTD devices.
+
+config MTD_TS7200_NOR_SIZE
+ int "Flash size (8 or 16mb)"
+ depends on MTD_TS7200_NOR
+ default "8"
+ help
+ Enter the NOR Flash size of your TS-7200 board. Can be 8 or 16.
+
# This needs CFI or JEDEC, depending on the cards found.
config MTD_PCI
tristate "PCI MTD driver"
diff --git a/drivers/mtd/maps/Makefile b/drivers/mtd/maps/Makefile
index bb035cd..775c2e7 100644
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -56,6 +56,7 @@ obj-$(CONFIG_MTD_DMV182) += dmv182.o
obj-$(CONFIG_MTD_PLATRAM) += plat-ram.o
obj-$(CONFIG_MTD_INTEL_VR_NOR) += intel_vr_nor.o
obj-$(CONFIG_MTD_BFIN_ASYNC) += bfin-async-flash.o
+obj-$(CONFIG_MTD_TS7200_NOR) += ts7200_flash.o
obj-$(CONFIG_MTD_RBTX4939) += rbtx4939-flash.o
obj-$(CONFIG_MTD_VMU) += vmu-flash.o
obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
diff --git a/drivers/mtd/maps/ts7200_flash.c b/drivers/mtd/maps/ts7200_flash.c
new file mode 100644
index 0000000..94fb4f4
--- /dev/null
+++ b/drivers/mtd/maps/ts7200_flash.c
@@ -0,0 +1,116 @@
+/*
+ * ts7200_flash.c - mapping for TS-7200 SBCs (8mb NOR flash)
+ * No platform_device resource is used here. All is hardcoded.
+ *
+ * (c) Copyright 2006-2010 Matthieu Crapet <mcrapet@gmail.com>
+ * Based on ts5500_flash.c by Sean Young <sean@mess.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <asm/sizes.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <mach/ep93xx-regs.h>
+
+
+static struct mtd_info *mymtd;
+
+static struct map_info ts7200nor_map = {
+ .name = "Full TS-7200 NOR flash",
+ .size = 0, /* filled in later */
+ .bankwidth = 2,
+ .phys = EP93XX_CS6_PHYS_BASE,
+};
+
+/*
+ * MTD partitioning stuff
+ */
+#ifdef CONFIG_MTD_PARTITIONS
+
+#define TS7200_BOOTROM_PART_SIZE (SZ_128K)
+#define TS7200_REDBOOT_PART_SIZE (15*SZ_128K)
+
+static struct mtd_partition ts7200_nor_parts[] =
+{
+ {
+ .name = "TS-BOOTROM",
+ .offset = 0,
+ .size = TS7200_BOOTROM_PART_SIZE,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ },
+ {
+ .name = "RootFS",
+ .offset = MTDPART_OFS_APPEND,
+ .size = 0, /* filled in later */
+ },
+ {
+ .name = "Redboot",
+ .offset = MTDPART_OFS_APPEND,
+ .size = MTDPART_SIZ_FULL, /* up to the end */
+ }
+};
+#endif
+
+static int __init ts7200_nor_init(void)
+{
+ if (CONFIG_MTD_TS7200_NOR_SIZE <= 8)
+ ts7200nor_map.size = SZ_8M;
+ else
+ ts7200nor_map.size = SZ_16M;
+
+ printk(KERN_NOTICE "TS-7200 flash mapping: %ldmo at 0x%x\n",
+ ts7200nor_map.size / SZ_1M, ts7200nor_map.phys);
+
+ ts7200nor_map.virt = ioremap(ts7200nor_map.phys, ts7200nor_map.size - 1);
+ if (!ts7200nor_map.virt) {
+ printk("ts7200_flash: failed to ioremap\n");
+ return -EIO;
+ }
+
+ simple_map_init(&ts7200nor_map);
+ mymtd = do_map_probe("cfi_probe", &ts7200nor_map);
+ if (mymtd) {
+ mymtd->owner = THIS_MODULE;
+ add_mtd_device(mymtd);
+ #ifdef CONFIG_MTD_PARTITIONS
+ ts7200_nor_parts[1].size = ts7200nor_map.size - TS7200_REDBOOT_PART_SIZE;
+ return add_mtd_partitions(mymtd, ts7200_nor_parts, ARRAY_SIZE(ts7200_nor_parts));
+ #else
+ return 0;
+ #endif
+ }
+
+ iounmap(ts7200nor_map.virt);
+ return -ENXIO;
+}
+
+static void __exit ts7200_nor_exit(void)
+{
+ if (mymtd) {
+ del_mtd_device(mymtd);
+ map_destroy(mymtd);
+ mymtd = NULL;
+ }
+ if (ts7200nor_map.virt) {
+ iounmap(ts7200nor_map.virt);
+ ts7200nor_map.virt = 0;
+ }
+}
+
+module_init(ts7200_nor_init);
+module_exit(ts7200_nor_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Matthieu Crapet <mcrapet@gmail.com>");
+MODULE_DESCRIPTION("MTD map driver for TS-7200 board");
+MODULE_VERSION("0.1");
--
1.7.1
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