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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/mtd/maps/physmap.c
downloadlinaro-lsk-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/mtd/maps/physmap.c')
-rw-r--r--drivers/mtd/maps/physmap.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/drivers/mtd/maps/physmap.c b/drivers/mtd/maps/physmap.c
new file mode 100644
index 00000000000..b853670bfb8
--- /dev/null
+++ b/drivers/mtd/maps/physmap.c
@@ -0,0 +1,125 @@
+/*
+ * $Id: physmap.c,v 1.37 2004/11/28 09:40:40 dwmw2 Exp $
+ *
+ * Normal mappings of chips in physical memory
+ *
+ * Copyright (C) 2003 MontaVista Software Inc.
+ * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
+ *
+ * 031022 - [jsun] add run-time configure and partition setup
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <asm/io.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/config.h>
+#include <linux/mtd/partitions.h>
+
+static struct mtd_info *mymtd;
+
+struct map_info physmap_map = {
+ .name = "phys_mapped_flash",
+ .phys = CONFIG_MTD_PHYSMAP_START,
+ .size = CONFIG_MTD_PHYSMAP_LEN,
+ .bankwidth = CONFIG_MTD_PHYSMAP_BANKWIDTH,
+};
+
+#ifdef CONFIG_MTD_PARTITIONS
+static struct mtd_partition *mtd_parts;
+static int mtd_parts_nb;
+
+static int num_physmap_partitions;
+static struct mtd_partition *physmap_partitions;
+
+static const char *part_probes[] __initdata = {"cmdlinepart", "RedBoot", NULL};
+
+void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
+{
+ physmap_partitions=parts;
+ num_physmap_partitions=num_parts;
+}
+#endif /* CONFIG_MTD_PARTITIONS */
+
+static int __init init_physmap(void)
+{
+ static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
+ const char **type;
+
+ printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys);
+ physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size);
+
+ if (!physmap_map.virt) {
+ printk("Failed to ioremap\n");
+ return -EIO;
+ }
+
+ simple_map_init(&physmap_map);
+
+ mymtd = NULL;
+ type = rom_probe_types;
+ for(; !mymtd && *type; type++) {
+ mymtd = do_map_probe(*type, &physmap_map);
+ }
+ if (mymtd) {
+ mymtd->owner = THIS_MODULE;
+
+#ifdef CONFIG_MTD_PARTITIONS
+ mtd_parts_nb = parse_mtd_partitions(mymtd, part_probes,
+ &mtd_parts, 0);
+
+ if (mtd_parts_nb > 0)
+ {
+ add_mtd_partitions (mymtd, mtd_parts, mtd_parts_nb);
+ return 0;
+ }
+
+ if (num_physmap_partitions != 0)
+ {
+ printk(KERN_NOTICE
+ "Using physmap partition definition\n");
+ add_mtd_partitions (mymtd, physmap_partitions, num_physmap_partitions);
+ return 0;
+ }
+
+#endif
+ add_mtd_device(mymtd);
+
+ return 0;
+ }
+
+ iounmap(physmap_map.virt);
+ return -ENXIO;
+}
+
+static void __exit cleanup_physmap(void)
+{
+#ifdef CONFIG_MTD_PARTITIONS
+ if (mtd_parts_nb) {
+ del_mtd_partitions(mymtd);
+ kfree(mtd_parts);
+ } else if (num_physmap_partitions) {
+ del_mtd_partitions(mymtd);
+ } else {
+ del_mtd_device(mymtd);
+ }
+#else
+ del_mtd_device(mymtd);
+#endif
+ map_destroy(mymtd);
+
+ iounmap(physmap_map.virt);
+ physmap_map.virt = NULL;
+}
+
+module_init(init_physmap);
+module_exit(cleanup_physmap);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_DESCRIPTION("Generic configurable MTD map driver");