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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/omap-toto-flash.c
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/omap-toto-flash.c')
-rw-r--r--drivers/mtd/maps/omap-toto-flash.c137
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/mtd/maps/omap-toto-flash.c b/drivers/mtd/maps/omap-toto-flash.c
new file mode 100644
index 00000000000..496109071cb
--- /dev/null
+++ b/drivers/mtd/maps/omap-toto-flash.c
@@ -0,0 +1,137 @@
+/*
+ * NOR Flash memory access on TI Toto board
+ *
+ * jzhang@ti.com (C) 2003 Texas Instruments.
+ *
+ * (C) 2002 MontVista Software, Inc.
+ *
+ * $Id: omap-toto-flash.c,v 1.3 2004/09/16 23:27:13 gleixner Exp $
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/errno.h>
+#include <linux/init.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/hardware.h>
+#include <asm/io.h>
+
+
+#ifndef CONFIG_ARCH_OMAP
+#error This is for OMAP architecture only
+#endif
+
+//these lines need be moved to a hardware header file
+#define OMAP_TOTO_FLASH_BASE 0xd8000000
+#define OMAP_TOTO_FLASH_SIZE 0x80000
+
+static struct map_info omap_toto_map_flash = {
+ .name = "OMAP Toto flash",
+ .bankwidth = 2,
+ .virt = (void __iomem *)OMAP_TOTO_FLASH_BASE,
+};
+
+
+static struct mtd_partition toto_flash_partitions[] = {
+ {
+ .name = "BootLoader",
+ .size = 0x00040000, /* hopefully u-boot will stay 128k + 128*/
+ .offset = 0,
+ .mask_flags = MTD_WRITEABLE, /* force read-only */
+ }, {
+ .name = "ReservedSpace",
+ .size = 0x00030000,
+ .offset = MTDPART_OFS_APPEND,
+ //mask_flags: MTD_WRITEABLE, /* force read-only */
+ }, {
+ .name = "EnvArea", /* bottom 64KiB for env vars */
+ .size = MTDPART_SIZ_FULL,
+ .offset = MTDPART_OFS_APPEND,
+ }
+};
+
+static struct mtd_partition *parsed_parts;
+
+static struct mtd_info *flash_mtd;
+
+static int __init init_flash (void)
+{
+
+ struct mtd_partition *parts;
+ int nb_parts = 0;
+ int parsed_nr_parts = 0;
+ const char *part_type;
+
+ /*
+ * Static partition definition selection
+ */
+ part_type = "static";
+
+ parts = toto_flash_partitions;
+ nb_parts = ARRAY_SIZE(toto_flash_partitions);
+ omap_toto_map_flash.size = OMAP_TOTO_FLASH_SIZE;
+ omap_toto_map_flash.phys = virt_to_phys(OMAP_TOTO_FLASH_BASE);
+
+ simple_map_init(&omap_toto_map_flash);
+ /*
+ * Now let's probe for the actual flash. Do it here since
+ * specific machine settings might have been set above.
+ */
+ printk(KERN_NOTICE "OMAP toto flash: probing %d-bit flash bus\n",
+ omap_toto_map_flash.bankwidth*8);
+ flash_mtd = do_map_probe("jedec_probe", &omap_toto_map_flash);
+ if (!flash_mtd)
+ return -ENXIO;
+
+ if (parsed_nr_parts > 0) {
+ parts = parsed_parts;
+ nb_parts = parsed_nr_parts;
+ }
+
+ if (nb_parts == 0) {
+ printk(KERN_NOTICE "OMAP toto flash: no partition info available,"
+ "registering whole flash at once\n");
+ if (add_mtd_device(flash_mtd)){
+ return -ENXIO;
+ }
+ } else {
+ printk(KERN_NOTICE "Using %s partition definition\n",
+ part_type);
+ return add_mtd_partitions(flash_mtd, parts, nb_parts);
+ }
+ return 0;
+}
+
+int __init omap_toto_mtd_init(void)
+{
+ int status;
+
+ if (status = init_flash()) {
+ printk(KERN_ERR "OMAP Toto Flash: unable to init map for toto flash\n");
+ }
+ return status;
+}
+
+static void __exit omap_toto_mtd_cleanup(void)
+{
+ if (flash_mtd) {
+ del_mtd_partitions(flash_mtd);
+ map_destroy(flash_mtd);
+ if (parsed_parts)
+ kfree(parsed_parts);
+ }
+}
+
+module_init(omap_toto_mtd_init);
+module_exit(omap_toto_mtd_cleanup);
+
+MODULE_AUTHOR("Jian Zhang");
+MODULE_DESCRIPTION("OMAP Toto board map driver");
+MODULE_LICENSE("GPL");