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 <mach/map.h>
30 #include <mach/bast-map.h>
31 #include <mach/bast-cpld.h>
32
33 #include "nor-simtec.h"
34
simtec_nor_vpp(struct platform_device * pdev,int vpp)35 static void simtec_nor_vpp(struct platform_device *pdev, int vpp)
36 {
37 unsigned int val;
38 unsigned long flags;
39
40 local_irq_save(flags);
41 val = __raw_readb(BAST_VA_CTRL3);
42
43 printk(KERN_DEBUG "%s(%d)\n", __func__, vpp);
44
45 if (vpp)
46 val |= BAST_CPLD_CTRL3_ROMWEN;
47 else
48 val &= ~BAST_CPLD_CTRL3_ROMWEN;
49
50 __raw_writeb(val, BAST_VA_CTRL3);
51 local_irq_restore(flags);
52 }
53
54 static struct physmap_flash_data simtec_nor_pdata = {
55 .width = 2,
56 .set_vpp = simtec_nor_vpp,
57 .nr_parts = 0,
58 };
59
60 static struct resource simtec_nor_resource[] = {
61 [0] = {
62 .start = S3C2410_CS1 + 0x4000000,
63 .end = S3C2410_CS1 + 0x4000000 + SZ_8M - 1,
64 .flags = IORESOURCE_MEM,
65 }
66 };
67
68 static struct platform_device simtec_device_nor = {
69 .name = "physmap-flash",
70 .id = -1,
71 .num_resources = ARRAY_SIZE(simtec_nor_resource),
72 .resource = simtec_nor_resource,
73 .dev = {
74 .platform_data = &simtec_nor_pdata,
75 },
76 };
77
nor_simtec_init(void)78 void __init nor_simtec_init(void)
79 {
80 int ret;
81
82 ret = platform_device_register(&simtec_device_nor);
83 if (ret < 0)
84 printk(KERN_ERR "failed to register physmap-flash device\n");
85 else
86 simtec_nor_vpp(NULL, 1);
87 }
88