1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/mtd/maps/impa7.c b/drivers/mtd/maps/impa7.c
new file mode 100644
index 000000000..b41401852
--- /dev/null
+++ b/drivers/mtd/maps/impa7.c
@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Handle mapping of the NOR flash on implementa A7 boards
+ *
+ * Copyright 2002 SYSGO Real-Time Solutions GmbH
+ */
+
+#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>
+
+#define WINDOW_ADDR0 0x00000000      /* physical properties of flash */
+#define WINDOW_SIZE0 0x00800000
+#define WINDOW_ADDR1 0x10000000      /* physical properties of flash */
+#define WINDOW_SIZE1 0x00800000
+#define NUM_FLASHBANKS 2
+#define BUSWIDTH     4
+
+#define MSG_PREFIX "impA7:"   /* prefix for our printk()'s */
+#define MTDID      "impa7-%d"  /* for mtdparts= partitioning */
+
+static struct mtd_info *impa7_mtd[NUM_FLASHBANKS];
+
+static const char * const rom_probe_types[] = { "jedec_probe", NULL };
+
+static struct map_info impa7_map[NUM_FLASHBANKS] = {
+	{
+		.name = "impA7 NOR Flash Bank #0",
+		.size = WINDOW_SIZE0,
+		.bankwidth = BUSWIDTH,
+	},
+	{
+		.name = "impA7 NOR Flash Bank #1",
+		.size = WINDOW_SIZE1,
+		.bankwidth = BUSWIDTH,
+	},
+};
+
+/*
+ * MTD partitioning stuff
+ */
+static const struct mtd_partition partitions[] =
+{
+	{
+		.name = "FileSystem",
+		.size = 0x800000,
+		.offset = 0x00000000
+	},
+};
+
+static int __init init_impa7(void)
+{
+	const char * const *type;
+	int i;
+	static struct { u_long addr; u_long size; } pt[NUM_FLASHBANKS] = {
+	  { WINDOW_ADDR0, WINDOW_SIZE0 },
+	  { WINDOW_ADDR1, WINDOW_SIZE1 },
+        };
+	int devicesfound = 0;
+
+	for(i=0; i<NUM_FLASHBANKS; i++)
+	{
+		printk(KERN_NOTICE MSG_PREFIX "probing 0x%08lx at 0x%08lx\n",
+		       pt[i].size, pt[i].addr);
+
+		impa7_map[i].phys = pt[i].addr;
+		impa7_map[i].virt = ioremap(pt[i].addr, pt[i].size);
+		if (!impa7_map[i].virt) {
+			printk(MSG_PREFIX "failed to ioremap\n");
+			return -EIO;
+		}
+		simple_map_init(&impa7_map[i]);
+
+		impa7_mtd[i] = NULL;
+		type = rom_probe_types;
+		for(; !impa7_mtd[i] && *type; type++) {
+			impa7_mtd[i] = do_map_probe(*type, &impa7_map[i]);
+		}
+
+		if (impa7_mtd[i]) {
+			impa7_mtd[i]->owner = THIS_MODULE;
+			devicesfound++;
+			mtd_device_register(impa7_mtd[i], partitions,
+					    ARRAY_SIZE(partitions));
+		} else {
+			iounmap((void __iomem *)impa7_map[i].virt);
+		}
+	}
+	return devicesfound == 0 ? -ENXIO : 0;
+}
+
+static void __exit cleanup_impa7(void)
+{
+	int i;
+	for (i=0; i<NUM_FLASHBANKS; i++) {
+		if (impa7_mtd[i]) {
+			mtd_device_unregister(impa7_mtd[i]);
+			map_destroy(impa7_mtd[i]);
+			iounmap((void __iomem *)impa7_map[i].virt);
+			impa7_map[i].virt = NULL;
+		}
+	}
+}
+
+module_init(init_impa7);
+module_exit(cleanup_impa7);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pavel Bartusek <pba@sysgo.de>");
+MODULE_DESCRIPTION("MTD map driver for implementa impA7");