Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mtd / maps / netsc520.c

diff --git a/kernel/drivers/mtd/maps/netsc520.c b/kernel/drivers/mtd/maps/netsc520.c
new file mode 100644 (file)
index 0000000..81dc259
--- /dev/null
+++ b/kernel/drivers/mtd/maps/netsc520.c
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+/* netsc520.c -- MTD map driver for AMD NetSc520 Demonstration Board
+ *
+ * Copyright (C) 2001 Mark Langsdorf (mark.langsdorf@amd.com)
+ *     based on sc520cdp.c by Sysgo Real-Time Solutions GmbH
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ *
+ * The NetSc520 is a demonstration board for the Elan Sc520 processor available
+ * from AMD.  It has a single back of 16 megs of 32-bit Flash ROM and another
+ * 16 megs of SDRAM.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+
+/*
+** The single, 16 megabyte flash bank is divided into four virtual
+** partitions.  The first partition is 768 KiB and is intended to
+** store the kernel image loaded by the bootstrap loader.  The second
+** partition is 256 KiB and holds the BIOS image.  The third
+** partition is 14.5 MiB and is intended for the flash file system
+** image.  The last partition is 512 KiB and contains another copy
+** of the BIOS image and the reset vector.
+**
+** Only the third partition should be mounted.  The first partition
+** should not be mounted, but it can erased and written to using the
+** MTD character routines.  The second and fourth partitions should
+** not be touched - it is possible to corrupt the BIOS image by
+** mounting these partitions, and potentially the board will not be
+** recoverable afterwards.
+*/
+
+/* 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[]={
+    {
+           .name = "NetSc520 boot kernel",
+           .offset = 0,
+           .size = 0xc0000
+    },
+    {
+           .name = "NetSc520 Low BIOS",
+           .offset = 0xc0000,
+           .size = 0x40000
+    },
+    {
+           .name = "NetSc520 file system",
+           .offset = 0x100000,
+           .size = 0xe80000
+    },
+    {
+           .name = "NetSc520 High BIOS",
+           .offset = 0xf80000,
+           .size = 0x80000
+    },
+};
+#define NUM_PARTITIONS ARRAY_SIZE(partition_info)
+
+#define WINDOW_SIZE    0x00100000
+#define WINDOW_ADDR    0x00200000
+
+static struct map_info netsc520_map = {
+       .name = "netsc520 Flash Bank",
+       .size = WINDOW_SIZE,
+       .bankwidth = 4,
+       .phys = WINDOW_ADDR,
+};
+
+#define NUM_FLASH_BANKS        ARRAY_SIZE(netsc520_map)
+
+static struct mtd_info *mymtd;
+
+static int __init init_netsc520(void)
+{
+       printk(KERN_NOTICE "NetSc520 flash device: 0x%Lx at 0x%Lx\n",
+                       (unsigned long long)netsc520_map.size,
+                       (unsigned long long)netsc520_map.phys);
+       netsc520_map.virt = ioremap_nocache(netsc520_map.phys, netsc520_map.size);
+
+       if (!netsc520_map.virt) {
+               printk("Failed to ioremap_nocache\n");
+               return -EIO;
+       }
+
+       simple_map_init(&netsc520_map);
+
+       mymtd = do_map_probe("cfi_probe", &netsc520_map);
+       if(!mymtd)
+               mymtd = do_map_probe("map_ram", &netsc520_map);
+       if(!mymtd)
+               mymtd = do_map_probe("map_rom", &netsc520_map);
+
+       if (!mymtd) {
+               iounmap(netsc520_map.virt);
+               return -ENXIO;
+       }
+
+       mymtd->owner = THIS_MODULE;
+       mtd_device_register(mymtd, partition_info, NUM_PARTITIONS);
+       return 0;
+}
+
+static void __exit cleanup_netsc520(void)
+{
+       if (mymtd) {
+               mtd_device_unregister(mymtd);
+               map_destroy(mymtd);
+       }
+       if (netsc520_map.virt) {
+               iounmap(netsc520_map.virt);
+               netsc520_map.virt = NULL;
+       }
+}
+
+module_init(init_netsc520);
+module_exit(cleanup_netsc520);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Mark Langsdorf <mark.langsdorf@amd.com>");
+MODULE_DESCRIPTION("MTD map driver for AMD NetSc520 Demonstration Board");