Merge branch 'for-2.6.27' of git://linux-nfs.org/~bfields/linux
[linux-2.6] / arch / arm / mach-s3c2410 / nor-simtec.c
1 /* linux/arch/arm/mach-s3c2410/nor-simtec.c
2  *
3  * Copyright (c) 2008 Simtec Electronics
4  *      http://armlinux.simtec.co.uk/
5  *      Ben Dooks <ben@simtec.co.uk>
6  *
7  * Simtec NOR mapping
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License version 2 as
11  * published by the Free Software Foundation.
12 */
13
14 #include <linux/module.h>
15 #include <linux/types.h>
16 #include <linux/init.h>
17 #include <linux/kernel.h>
18 #include <linux/platform_device.h>
19
20 #include <linux/mtd/mtd.h>
21 #include <linux/mtd/map.h>
22 #include <linux/mtd/physmap.h>
23 #include <linux/mtd/partitions.h>
24
25 #include <asm/mach/arch.h>
26 #include <asm/mach/map.h>
27 #include <asm/mach/irq.h>
28
29 #include <asm/arch/map.h>
30 #include <asm/arch/bast-map.h>
31 #include <asm/arch/bast-cpld.h>
32
33
34 static void simtec_nor_vpp(struct map_info *map, int vpp)
35 {
36         unsigned int val;
37         unsigned long flags;
38
39         local_irq_save(flags);
40         val = __raw_readb(BAST_VA_CTRL3);
41
42         printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
43
44         if (vpp)
45                 val |= BAST_CPLD_CTRL3_ROMWEN;
46         else
47                 val &= ~BAST_CPLD_CTRL3_ROMWEN;
48
49         __raw_writeb(val, BAST_VA_CTRL3);
50         local_irq_restore(flags);
51 }
52
53 struct physmap_flash_data simtec_nor_pdata = {
54         .width          = 2,
55         .set_vpp        = simtec_nor_vpp,
56         .nr_parts       = 0,
57 };
58
59 static struct resource simtec_nor_resource[] = {
60         [0] = {
61                 .start = S3C2410_CS1 + 0x4000000,
62                 .end   = S3C2410_CS1 + 0x4000000 + SZ_8M - 1,
63                 .flags = IORESOURCE_MEM,
64         }
65 };
66
67 static struct platform_device simtec_device_nor = {
68         .name           = "physmap-flash",
69         .id             = -1,
70         .num_resources  = ARRAY_SIZE(simtec_nor_resource),
71         .resource       = simtec_nor_resource,
72         .dev            = {
73                 .platform_data = &simtec_nor_pdata,
74         },
75 };
76
77 void __init nor_simtec_init(void)
78 {
79         int ret;
80
81         ret = platform_device_register(&simtec_device_nor);
82         if (ret < 0)
83                 printk(KERN_ERR "failed to register physmap-flash device\n");
84         else
85                 simtec_nor_vpp(NULL, 1);
86 }