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Linux kernel mirror (for testing)
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linux
1/*
2 * $Id: redwood.c,v 1.11 2005/11/07 11:14:28 gleixner 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/* FIXME: the window is bigger - armin */
76#define WINDOW_ADDR 0xff800000
77#define WINDOW_SIZE 0x00800000
78
79#define RW_PART0_OF 0
80#define RW_PART0_SZ 0x400000 /* 4 MiB data */
81#define RW_PART1_OF RW_PART0_OF + RW_PART0_SZ
82#define RW_PART1_SZ 0x10000 /* 64K VPD */
83#define RW_PART2_OF RW_PART1_OF + RW_PART1_SZ
84#define RW_PART2_SZ 0x400000 - (0x10000 + 0x20000)
85#define RW_PART3_OF RW_PART2_OF + RW_PART2_SZ
86#define RW_PART3_SZ 0x20000
87
88static struct mtd_partition redwood_flash_partitions[] = {
89 {
90 .name = "Redwood filesystem",
91 .offset = RW_PART0_OF,
92 .size = RW_PART0_SZ
93 },
94 {
95 .name = "Redwood OpenBIOS Vital Product Data",
96 .offset = RW_PART1_OF,
97 .size = RW_PART1_SZ,
98 .mask_flags = MTD_WRITEABLE /* force read-only */
99 },
100 {
101 .name = "Redwood kernel",
102 .offset = RW_PART2_OF,
103 .size = RW_PART2_SZ
104 },
105 {
106 .name = "Redwood OpenBIOS",
107 .offset = RW_PART3_OF,
108 .size = RW_PART3_SZ,
109 .mask_flags = MTD_WRITEABLE /* force read-only */
110 }
111};
112
113#endif /* CONFIG_REDWOOD_6 */
114
115struct map_info redwood_flash_map = {
116 .name = "IBM Redwood",
117 .size = WINDOW_SIZE,
118 .bankwidth = 2,
119 .phys = WINDOW_ADDR,
120};
121
122
123#define NUM_REDWOOD_FLASH_PARTITIONS ARRAY_SIZE(redwood_flash_partitions)
124
125static struct mtd_info *redwood_mtd;
126
127int __init init_redwood_flash(void)
128{
129 int err;
130
131 printk(KERN_NOTICE "redwood: flash mapping: %x at %x\n",
132 WINDOW_SIZE, WINDOW_ADDR);
133
134 redwood_flash_map.virt = ioremap(WINDOW_ADDR, WINDOW_SIZE);
135
136 if (!redwood_flash_map.virt) {
137 printk("init_redwood_flash: failed to ioremap\n");
138 return -EIO;
139 }
140 simple_map_init(&redwood_flash_map);
141
142 redwood_mtd = do_map_probe("cfi_probe",&redwood_flash_map);
143
144 if (redwood_mtd) {
145 redwood_mtd->owner = THIS_MODULE;
146 err = add_mtd_partitions(redwood_mtd,
147 redwood_flash_partitions,
148 NUM_REDWOOD_FLASH_PARTITIONS);
149 if (err) {
150 printk("init_redwood_flash: add_mtd_partitions failed\n");
151 iounmap(redwood_flash_map.virt);
152 }
153 return err;
154
155 }
156
157 iounmap(redwood_flash_map.virt);
158 return -ENXIO;
159}
160
161static void __exit cleanup_redwood_flash(void)
162{
163 if (redwood_mtd) {
164 del_mtd_partitions(redwood_mtd);
165 /* moved iounmap after map_destroy - armin */
166 map_destroy(redwood_mtd);
167 iounmap((void *)redwood_flash_map.virt);
168 }
169}
170
171module_init(init_redwood_flash);
172module_exit(cleanup_redwood_flash);
173
174MODULE_LICENSE("GPL");
175MODULE_AUTHOR("MontaVista Software <source@mvista.com>");
176MODULE_DESCRIPTION("MTD map driver for the IBM Redwood reference boards");