2 * NOR Flash memory access on TI Toto board
4 * jzhang@ti.com (C) 2003 Texas Instruments.
6 * (C) 2002 MontVista Software, Inc.
8 * $Id: omap-toto-flash.c,v 1.5 2005/11/07 11:14:27 gleixner Exp $
11 #include <linux/module.h>
12 #include <linux/types.h>
13 #include <linux/kernel.h>
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/slab.h>
18 #include <linux/mtd/mtd.h>
19 #include <linux/mtd/map.h>
20 #include <linux/mtd/partitions.h>
22 #include <asm/hardware.h>
26 #ifndef CONFIG_ARCH_OMAP
27 #error This is for OMAP architecture only
30 //these lines need be moved to a hardware header file
31 #define OMAP_TOTO_FLASH_BASE 0xd8000000
32 #define OMAP_TOTO_FLASH_SIZE 0x80000
34 static struct map_info omap_toto_map_flash = {
35 .name = "OMAP Toto flash",
37 .virt = (void __iomem *)OMAP_TOTO_FLASH_BASE,
41 static struct mtd_partition toto_flash_partitions[] = {
44 .size = 0x00040000, /* hopefully u-boot will stay 128k + 128*/
46 .mask_flags = MTD_WRITEABLE, /* force read-only */
48 .name = "ReservedSpace",
50 .offset = MTDPART_OFS_APPEND,
51 //mask_flags: MTD_WRITEABLE, /* force read-only */
53 .name = "EnvArea", /* bottom 64KiB for env vars */
54 .size = MTDPART_SIZ_FULL,
55 .offset = MTDPART_OFS_APPEND,
59 static struct mtd_partition *parsed_parts;
61 static struct mtd_info *flash_mtd;
63 static int __init init_flash (void)
66 struct mtd_partition *parts;
68 int parsed_nr_parts = 0;
69 const char *part_type;
72 * Static partition definition selection
76 parts = toto_flash_partitions;
77 nb_parts = ARRAY_SIZE(toto_flash_partitions);
78 omap_toto_map_flash.size = OMAP_TOTO_FLASH_SIZE;
79 omap_toto_map_flash.phys = virt_to_phys(OMAP_TOTO_FLASH_BASE);
81 simple_map_init(&omap_toto_map_flash);
83 * Now let's probe for the actual flash. Do it here since
84 * specific machine settings might have been set above.
86 printk(KERN_NOTICE "OMAP toto flash: probing %d-bit flash bus\n",
87 omap_toto_map_flash.bankwidth*8);
88 flash_mtd = do_map_probe("jedec_probe", &omap_toto_map_flash);
92 if (parsed_nr_parts > 0) {
94 nb_parts = parsed_nr_parts;
98 printk(KERN_NOTICE "OMAP toto flash: no partition info available,"
99 "registering whole flash at once\n");
100 if (add_mtd_device(flash_mtd)){
104 printk(KERN_NOTICE "Using %s partition definition\n",
106 return add_mtd_partitions(flash_mtd, parts, nb_parts);
111 int __init omap_toto_mtd_init(void)
115 if (status = init_flash()) {
116 printk(KERN_ERR "OMAP Toto Flash: unable to init map for toto flash\n");
121 static void __exit omap_toto_mtd_cleanup(void)
124 del_mtd_partitions(flash_mtd);
125 map_destroy(flash_mtd);
130 module_init(omap_toto_mtd_init);
131 module_exit(omap_toto_mtd_cleanup);
133 MODULE_AUTHOR("Jian Zhang");
134 MODULE_DESCRIPTION("OMAP Toto board map driver");
135 MODULE_LICENSE("GPL");