1/*
2 * $Id: redwood.c,v 1.1.1.1 2007/08/03 18:52:44 Exp $
3 *
4 * drivers/mtd/maps/redwood.c
5 *
6 * FLASH map for the IBM Redwood 4/5/6 boards.
7 *
8 * Author: MontaVista Software, Inc. <source@mvista.com>
9 *
10 * 2001-2003 (c) MontaVista, Software, Inc. This file is licensed under
11 * the terms of the GNU General Public License version 2. This program
12 * is licensed "as is" without any warranty of any kind, whether express
13 * or implied.
14 */
15
16#include <linux/module.h>
17#include <linux/types.h>
18#include <linux/kernel.h>
19#include <linux/init.h>
20
21#include <linux/mtd/mtd.h>
22#include <linux/mtd/map.h>
23#include <linux/mtd/partitions.h>
24
25#include <asm/io.h>
26
27#if !defined(CONFIG_REDWOOD_6)
28
29#define WINDOW_ADDR 0xffc00000
30#define WINDOW_SIZE 0x00400000
31
32#define RW_PART0_OF	0
33#define RW_PART0_SZ	0x10000
34#define RW_PART1_OF	RW_PART0_SZ
35#define RW_PART1_SZ	0x200000 - 0x10000
36#define RW_PART2_OF	0x200000
37#define RW_PART2_SZ	0x10000
38#define RW_PART3_OF	0x210000
39#define RW_PART3_SZ	0x200000 - (0x10000 + 0x20000)
40#define RW_PART4_OF	0x3e0000
41#define RW_PART4_SZ	0x20000
42
43static struct mtd_partition redwood_flash_partitions[] = {
44	{
45		.name = "Redwood OpenBIOS Vital Product Data",
46		.offset = RW_PART0_OF,
47		.size = RW_PART0_SZ,
48		.mask_flags = MTD_WRITEABLE	/* force read-only */
49	},
50	{
51		.name = "Redwood kernel",
52		.offset = RW_PART1_OF,
53		.size = RW_PART1_SZ
54	},
55	{
56		.name = "Redwood OpenBIOS non-volatile storage",
57		.offset = RW_PART2_OF,
58		.size = RW_PART2_SZ,
59		.mask_flags = MTD_WRITEABLE	/* force read-only */
60	},
61	{
62		.name = "Redwood filesystem",
63		.offset = RW_PART3_OF,
64		.size = RW_PART3_SZ
65	},
66	{
67		.name = "Redwood OpenBIOS",
68		.offset = RW_PART4_OF,
69		.size = RW_PART4_SZ,
70		.mask_flags = MTD_WRITEABLE	/* force read-only */
71	}
72};
73
74#else /* CONFIG_REDWOOD_6 */
75#define WINDOW_ADDR 0xff800000
76#define WINDOW_SIZE 0x00800000
77
78#define RW_PART0_OF	0
79#define RW_PART0_SZ	0x400000	/* 4 MiB data */
80#define RW_PART1_OF	RW_PART0_OF + RW_PART0_SZ
81#define RW_PART1_SZ	0x10000		/* 64K VPD */
82#define RW_PART2_OF	RW_PART1_OF + RW_PART1_SZ
83#define RW_PART2_SZ	0x400000 - (0x10000 + 0x20000)
84#define RW_PART3_OF	RW_PART2_OF + RW_PART2_SZ
85#define RW_PART3_SZ	0x20000
86
87static struct mtd_partition redwood_flash_partitions[] = {
88	{
89		.name = "Redwood filesystem",
90		.offset = RW_PART0_OF,
91		.size = RW_PART0_SZ
92	},
93	{
94		.name = "Redwood OpenBIOS Vital Product Data",
95		.offset = RW_PART1_OF,
96		.size = RW_PART1_SZ,
97		.mask_flags = MTD_WRITEABLE	/* force read-only */
98	},
99	{
100		.name = "Redwood kernel",
101		.offset = RW_PART2_OF,
102		.size = RW_PART2_SZ
103	},
104	{
105		.name = "Redwood OpenBIOS",
106		.offset = RW_PART3_OF,
107		.size = RW_PART3_SZ,
108		.mask_flags = MTD_WRITEABLE	/* force read-only */
109	}
110};
111
112#endif /* CONFIG_REDWOOD_6 */
113
114struct map_info redwood_flash_map = {
115	.name = "IBM Redwood",
116	.size = WINDOW_SIZE,
117	.bankwidth = 2,
118	.phys = WINDOW_ADDR,
119};
120
121
122#define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
123
124static struct mtd_info *redwood_mtd;
125
126int __init init_redwood_flash(void)
127{
128	int err;
129
130	printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
131			WINDOW_SIZE, WINDOW_ADDR);
132
133	redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
134
135	if (!redwood_flash_map.virt) {
136		printk("init_redwood_flash: failed to ioremap\n");
137		return -EIO;
138	}
139	simple_map_init(&redwood_flash_map);
140
141	redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
142
143	if (redwood_mtd) {
144		redwood_mtd->owner = THIS_MODULE;
145		err = add_mtd_partitions(redwood_mtd,
146				redwood_flash_partitions,
147				NUM_REDWOOD_FLASH_PARTITIONS);
148		if (err) {
149			printk("init_redwood_flash: add_mtd_partitions failed\n");
150			iounmap(redwood_flash_map.virt);
151		}
152		return err;
153
154	}
155
156	iounmap(redwood_flash_map.virt);
157	return -ENXIO;
158}
159
160static void __exit cleanup_redwood_flash(void)
161{
162	if (redwood_mtd) {
163		del_mtd_partitions(redwood_mtd);
164		/* moved iounmap after map_destroy - armin */
165		map_destroy(redwood_mtd);
166		iounmap((void *)redwood_flash_map.virt);
167	}
168}
169
170module_init(init_redwood_flash);
171module_exit(cleanup_redwood_flash);
172
173MODULE_LICENSE("GPL");
174MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
175MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");
176