Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 127 insertions, 0 deletions

diff --git a/drivers/mtd/maps/netsc520.c b/drivers/mtd/maps/netsc520.c
new file mode 100644
index 000000000..0bb651624
--- /dev/null
+++ b/drivers/mtd/maps/netsc520.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* 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
+ *
+ * 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 const 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(netsc520_map.phys, netsc520_map.size);
+
+	if (!netsc520_map.virt) {
+		printk("Failed to ioremap\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");