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1da177e4 LT |
1 | /*====================================================================== |
2 | ||
3 | drivers/mtd/maps/integrator-flash.c: ARM Integrator flash map driver | |
69f34c98 | 4 | |
1da177e4 LT |
5 | Copyright (C) 2000 ARM Limited |
6 | Copyright (C) 2003 Deep Blue Solutions Ltd. | |
69f34c98 | 7 | |
1da177e4 LT |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
69f34c98 | 12 | |
1da177e4 LT |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
69f34c98 | 17 | |
1da177e4 LT |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
69f34c98 TG |
21 | |
22 | This is access code for flashes using ARM's flash partitioning | |
1da177e4 LT |
23 | standards. |
24 | ||
69f34c98 | 25 | $Id: integrator-flash.c,v 1.20 2005/11/07 11:14:27 gleixner Exp $ |
1da177e4 LT |
26 | |
27 | ======================================================================*/ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/types.h> | |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/ioport.h> | |
d052d1be | 34 | #include <linux/platform_device.h> |
1da177e4 LT |
35 | #include <linux/init.h> |
36 | ||
37 | #include <linux/mtd/mtd.h> | |
38 | #include <linux/mtd/map.h> | |
39 | #include <linux/mtd/partitions.h> | |
40 | ||
41 | #include <asm/mach/flash.h> | |
42 | #include <asm/hardware.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/system.h> | |
45 | ||
46 | #ifdef CONFIG_ARCH_P720T | |
47 | #define FLASH_BASE (0x04000000) | |
48 | #define FLASH_SIZE (64*1024*1024) | |
49 | #endif | |
50 | ||
51 | struct armflash_info { | |
52 | struct flash_platform_data *plat; | |
53 | struct resource *res; | |
54 | struct mtd_partition *parts; | |
55 | struct mtd_info *mtd; | |
56 | struct map_info map; | |
57 | }; | |
58 | ||
59 | static void armflash_set_vpp(struct map_info *map, int on) | |
60 | { | |
61 | struct armflash_info *info = container_of(map, struct armflash_info, map); | |
62 | ||
63 | if (info->plat && info->plat->set_vpp) | |
64 | info->plat->set_vpp(on); | |
65 | } | |
66 | ||
67 | static const char *probes[] = { "cmdlinepart", "RedBoot", "afs", NULL }; | |
68 | ||
3ae5eaec | 69 | static int armflash_probe(struct platform_device *dev) |
1da177e4 | 70 | { |
1da177e4 LT |
71 | struct flash_platform_data *plat = dev->dev.platform_data; |
72 | struct resource *res = dev->resource; | |
73 | unsigned int size = res->end - res->start + 1; | |
74 | struct armflash_info *info; | |
75 | int err; | |
76 | void __iomem *base; | |
77 | ||
95b93a0c | 78 | info = kzalloc(sizeof(struct armflash_info), GFP_KERNEL); |
1da177e4 LT |
79 | if (!info) { |
80 | err = -ENOMEM; | |
81 | goto out; | |
82 | } | |
83 | ||
1da177e4 LT |
84 | info->plat = plat; |
85 | if (plat && plat->init) { | |
86 | err = plat->init(); | |
87 | if (err) | |
88 | goto no_resource; | |
89 | } | |
90 | ||
91 | info->res = request_mem_region(res->start, size, "armflash"); | |
92 | if (!info->res) { | |
93 | err = -EBUSY; | |
94 | goto no_resource; | |
95 | } | |
96 | ||
97 | base = ioremap(res->start, size); | |
98 | if (!base) { | |
99 | err = -ENOMEM; | |
100 | goto no_mem; | |
101 | } | |
102 | ||
103 | /* | |
104 | * look for CFI based flash parts fitted to this board | |
105 | */ | |
106 | info->map.size = size; | |
107 | info->map.bankwidth = plat->width; | |
108 | info->map.phys = res->start; | |
109 | info->map.virt = base; | |
110 | info->map.name = dev->dev.bus_id; | |
111 | info->map.set_vpp = armflash_set_vpp; | |
112 | ||
113 | simple_map_init(&info->map); | |
114 | ||
115 | /* | |
116 | * Also, the CFI layer automatically works out what size | |
117 | * of chips we have, and does the necessary identification | |
118 | * for us automatically. | |
119 | */ | |
120 | info->mtd = do_map_probe(plat->map_name, &info->map); | |
121 | if (!info->mtd) { | |
122 | err = -ENXIO; | |
123 | goto no_device; | |
124 | } | |
125 | ||
126 | info->mtd->owner = THIS_MODULE; | |
127 | ||
128 | err = parse_mtd_partitions(info->mtd, probes, &info->parts, 0); | |
129 | if (err > 0) { | |
130 | err = add_mtd_partitions(info->mtd, info->parts, err); | |
131 | if (err) | |
132 | printk(KERN_ERR | |
133 | "mtd partition registration failed: %d\n", err); | |
134 | } | |
135 | ||
136 | if (err == 0) | |
3ae5eaec | 137 | platform_set_drvdata(dev, info); |
1da177e4 LT |
138 | |
139 | /* | |
140 | * If we got an error, free all resources. | |
141 | */ | |
142 | if (err < 0) { | |
143 | if (info->mtd) { | |
144 | del_mtd_partitions(info->mtd); | |
145 | map_destroy(info->mtd); | |
146 | } | |
fa671646 | 147 | kfree(info->parts); |
1da177e4 LT |
148 | |
149 | no_device: | |
150 | iounmap(base); | |
151 | no_mem: | |
152 | release_mem_region(res->start, size); | |
153 | no_resource: | |
154 | if (plat && plat->exit) | |
155 | plat->exit(); | |
156 | kfree(info); | |
157 | } | |
158 | out: | |
159 | return err; | |
160 | } | |
161 | ||
3ae5eaec | 162 | static int armflash_remove(struct platform_device *dev) |
1da177e4 | 163 | { |
3ae5eaec | 164 | struct armflash_info *info = platform_get_drvdata(dev); |
1da177e4 | 165 | |
3ae5eaec | 166 | platform_set_drvdata(dev, NULL); |
1da177e4 LT |
167 | |
168 | if (info) { | |
169 | if (info->mtd) { | |
170 | del_mtd_partitions(info->mtd); | |
171 | map_destroy(info->mtd); | |
172 | } | |
fa671646 | 173 | kfree(info->parts); |
1da177e4 LT |
174 | |
175 | iounmap(info->map.virt); | |
176 | release_resource(info->res); | |
177 | kfree(info->res); | |
178 | ||
179 | if (info->plat && info->plat->exit) | |
180 | info->plat->exit(); | |
181 | ||
182 | kfree(info); | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | ||
3ae5eaec | 188 | static struct platform_driver armflash_driver = { |
1da177e4 LT |
189 | .probe = armflash_probe, |
190 | .remove = armflash_remove, | |
3ae5eaec RK |
191 | .driver = { |
192 | .name = "armflash", | |
193 | }, | |
1da177e4 LT |
194 | }; |
195 | ||
196 | static int __init armflash_init(void) | |
197 | { | |
3ae5eaec | 198 | return platform_driver_register(&armflash_driver); |
1da177e4 LT |
199 | } |
200 | ||
201 | static void __exit armflash_exit(void) | |
202 | { | |
3ae5eaec | 203 | platform_driver_unregister(&armflash_driver); |
1da177e4 LT |
204 | } |
205 | ||
206 | module_init(armflash_init); | |
207 | module_exit(armflash_exit); | |
208 | ||
209 | MODULE_AUTHOR("ARM Ltd"); | |
210 | MODULE_DESCRIPTION("ARM Integrator CFI map driver"); | |
211 | MODULE_LICENSE("GPL"); |