Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / mtd / maps / impa7.c

diff --git a/kernel/drivers/mtd/maps/impa7.c b/kernel/drivers/mtd/maps/impa7.c
new file mode 100644 (file)
index 0000000..15bbda0
--- /dev/null
+++ b/kernel/drivers/mtd/maps/impa7.c
@@ -0,0 +1,119 @@
+/*
+ * Handle mapping of the NOR flash on implementa A7 boards
+ *
+ * Copyright 2002 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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 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_parse_register(impa7_mtd[i], NULL, NULL,
+                                                 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");