This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / drivers / mtd / maps / omap-toto-flash.c

diff --git a/drivers/mtd/maps/omap-toto-flash.c b/drivers/mtd/maps/omap-toto-flash.c
new file mode 100644 (file)
index 0000000..4262f1c
--- /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 1.2 2004/07/12 21:59:44 dwmw2 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 =         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");