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1da177e4 | 1 | /* |
2b9175c1 | 2 | * $Id: physmap.c,v 1.39 2005/11/29 14:49:36 gleixner Exp $ |
1da177e4 LT |
3 | * |
4 | * Normal mappings of chips in physical memory | |
5 | * | |
6 | * Copyright (C) 2003 MontaVista Software Inc. | |
7 | * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net | |
8 | * | |
9 | * 031022 - [jsun] add run-time configure and partition setup | |
10 | */ | |
11 | ||
12 | #include <linux/module.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/slab.h> | |
73566edf LB |
17 | #include <linux/device.h> |
18 | #include <linux/platform_device.h> | |
1da177e4 LT |
19 | #include <linux/mtd/mtd.h> |
20 | #include <linux/mtd/map.h> | |
1da177e4 | 21 | #include <linux/mtd/partitions.h> |
2b9175c1 | 22 | #include <linux/mtd/physmap.h> |
df66e716 | 23 | #include <linux/mtd/concat.h> |
73566edf | 24 | #include <asm/io.h> |
1da177e4 | 25 | |
df66e716 SR |
26 | #define MAX_RESOURCES 4 |
27 | ||
73566edf | 28 | struct physmap_flash_info { |
df66e716 SR |
29 | struct mtd_info *mtd[MAX_RESOURCES]; |
30 | struct mtd_info *cmtd; | |
31 | struct map_info map[MAX_RESOURCES]; | |
73566edf LB |
32 | struct resource *res; |
33 | #ifdef CONFIG_MTD_PARTITIONS | |
34 | int nr_parts; | |
35 | struct mtd_partition *parts; | |
36 | #endif | |
1da177e4 LT |
37 | }; |
38 | ||
73566edf LB |
39 | static int physmap_flash_remove(struct platform_device *dev) |
40 | { | |
41 | struct physmap_flash_info *info; | |
42 | struct physmap_flash_data *physmap_data; | |
df66e716 | 43 | int i; |
73566edf LB |
44 | |
45 | info = platform_get_drvdata(dev); | |
46 | if (info == NULL) | |
47 | return 0; | |
48 | platform_set_drvdata(dev, NULL); | |
49 | ||
50 | physmap_data = dev->dev.platform_data; | |
51 | ||
df66e716 SR |
52 | #ifdef CONFIG_MTD_CONCAT |
53 | if (info->cmtd != info->mtd[0]) { | |
54 | del_mtd_device(info->cmtd); | |
55 | mtd_concat_destroy(info->cmtd); | |
56 | } | |
57 | #endif | |
58 | ||
59 | for (i = 0; i < MAX_RESOURCES; i++) { | |
60 | if (info->mtd[i] != NULL) { | |
1da177e4 | 61 | #ifdef CONFIG_MTD_PARTITIONS |
df66e716 SR |
62 | if (info->nr_parts) { |
63 | del_mtd_partitions(info->mtd[i]); | |
64 | kfree(info->parts); | |
65 | } else if (physmap_data->nr_parts) { | |
66 | del_mtd_partitions(info->mtd[i]); | |
67 | } else { | |
68 | del_mtd_device(info->mtd[i]); | |
69 | } | |
73566edf | 70 | #else |
df66e716 | 71 | del_mtd_device(info->mtd[i]); |
73566edf | 72 | #endif |
df66e716 SR |
73 | map_destroy(info->mtd[i]); |
74 | } | |
1da177e4 | 75 | |
df66e716 SR |
76 | if (info->map[i].virt != NULL) |
77 | iounmap(info->map[i].virt); | |
78 | } | |
1da177e4 | 79 | |
73566edf LB |
80 | if (info->res != NULL) { |
81 | release_resource(info->res); | |
82 | kfree(info->res); | |
83 | } | |
1da177e4 | 84 | |
73566edf | 85 | return 0; |
1da177e4 | 86 | } |
1da177e4 | 87 | |
73566edf LB |
88 | static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL }; |
89 | #ifdef CONFIG_MTD_PARTITIONS | |
90 | static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL }; | |
91 | #endif | |
92 | ||
93 | static int physmap_flash_probe(struct platform_device *dev) | |
1da177e4 | 94 | { |
73566edf LB |
95 | struct physmap_flash_data *physmap_data; |
96 | struct physmap_flash_info *info; | |
97 | const char **probe_type; | |
df66e716 SR |
98 | int err = 0; |
99 | int i; | |
100 | int devices_found = 0; | |
73566edf LB |
101 | |
102 | physmap_data = dev->dev.platform_data; | |
103 | if (physmap_data == NULL) | |
104 | return -ENODEV; | |
105 | ||
95b93a0c | 106 | info = kzalloc(sizeof(struct physmap_flash_info), GFP_KERNEL); |
73566edf LB |
107 | if (info == NULL) { |
108 | err = -ENOMEM; | |
109 | goto err_out; | |
110 | } | |
1da177e4 | 111 | |
73566edf | 112 | platform_set_drvdata(dev, info); |
1da177e4 | 113 | |
df66e716 SR |
114 | for (i = 0; i < dev->num_resources; i++) { |
115 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
116 | (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1), | |
117 | (unsigned long long)dev->resource[i].start); | |
118 | ||
119 | info->res = request_mem_region(dev->resource[i].start, | |
120 | dev->resource[i].end - dev->resource[i].start + 1, | |
121 | dev->dev.bus_id); | |
122 | if (info->res == NULL) { | |
123 | dev_err(&dev->dev, "Could not reserve memory region\n"); | |
124 | err = -ENOMEM; | |
125 | goto err_out; | |
126 | } | |
1da177e4 | 127 | |
df66e716 SR |
128 | info->map[i].name = dev->dev.bus_id; |
129 | info->map[i].phys = dev->resource[i].start; | |
130 | info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1; | |
131 | info->map[i].bankwidth = physmap_data->width; | |
132 | info->map[i].set_vpp = physmap_data->set_vpp; | |
133 | ||
134 | info->map[i].virt = ioremap(info->map[i].phys, info->map[i].size); | |
135 | if (info->map[i].virt == NULL) { | |
136 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
137 | err = EIO; | |
138 | goto err_out; | |
139 | } | |
73566edf | 140 | |
df66e716 | 141 | simple_map_init(&info->map[i]); |
1da177e4 | 142 | |
df66e716 SR |
143 | probe_type = rom_probe_types; |
144 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
145 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
146 | if (info->mtd[i] == NULL) { | |
147 | dev_err(&dev->dev, "map_probe failed\n"); | |
148 | err = -ENXIO; | |
149 | goto err_out; | |
150 | } else { | |
151 | devices_found++; | |
152 | } | |
153 | info->mtd[i]->owner = THIS_MODULE; | |
154 | } | |
73566edf | 155 | |
df66e716 SR |
156 | if (devices_found == 1) { |
157 | info->cmtd = info->mtd[0]; | |
158 | } else if (devices_found > 1) { | |
159 | /* | |
160 | * We detected multiple devices. Concatenate them together. | |
161 | */ | |
162 | #ifdef CONFIG_MTD_CONCAT | |
163 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev->dev.bus_id); | |
164 | if (info->cmtd == NULL) | |
165 | err = -ENXIO; | |
166 | #else | |
167 | printk(KERN_ERR "physmap-flash: multiple devices " | |
168 | "found but MTD concat support disabled.\n"); | |
73566edf | 169 | err = -ENXIO; |
df66e716 | 170 | #endif |
1da177e4 | 171 | } |
df66e716 SR |
172 | if (err) |
173 | goto err_out; | |
1da177e4 LT |
174 | |
175 | #ifdef CONFIG_MTD_PARTITIONS | |
df66e716 | 176 | err = parse_mtd_partitions(info->cmtd, part_probe_types, &info->parts, 0); |
73566edf | 177 | if (err > 0) { |
df66e716 | 178 | add_mtd_partitions(info->cmtd, info->parts, err); |
73566edf LB |
179 | return 0; |
180 | } | |
1da177e4 | 181 | |
73566edf LB |
182 | if (physmap_data->nr_parts) { |
183 | printk(KERN_NOTICE "Using physmap partition information\n"); | |
df66e716 SR |
184 | add_mtd_partitions(info->cmtd, physmap_data->parts, |
185 | physmap_data->nr_parts); | |
73566edf LB |
186 | return 0; |
187 | } | |
188 | #endif | |
189 | ||
df66e716 | 190 | add_mtd_device(info->cmtd); |
73566edf LB |
191 | return 0; |
192 | ||
193 | err_out: | |
194 | physmap_flash_remove(dev); | |
195 | return err; | |
196 | } | |
197 | ||
17c2dae3 LB |
198 | #ifdef CONFIG_PM |
199 | static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state) | |
200 | { | |
201 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
202 | int ret = 0; | |
df66e716 | 203 | int i; |
17c2dae3 LB |
204 | |
205 | if (info) | |
df66e716 SR |
206 | for (i = 0; i < MAX_RESOURCES; i++) |
207 | ret |= info->mtd[i].suspend(info->mtd[i]); | |
17c2dae3 LB |
208 | |
209 | return ret; | |
210 | } | |
211 | ||
212 | static int physmap_flash_resume(struct platform_device *dev) | |
213 | { | |
214 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
215 | int i; |
216 | ||
17c2dae3 | 217 | if (info) |
df66e716 SR |
218 | for (i = 0; i < MAX_RESOURCES; i++) |
219 | info->mtd[i].resume(info->mtd[i]); | |
17c2dae3 LB |
220 | return 0; |
221 | } | |
222 | ||
223 | static void physmap_flash_shutdown(struct platform_device *dev) | |
224 | { | |
225 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
226 | int i; |
227 | ||
228 | for (i = 0; i < MAX_RESOURCES; i++) | |
229 | if (info && info->mtd[i].suspend(info->mtd[i]) == 0) | |
230 | info->mtd[i].resume(info->mtd[i]); | |
17c2dae3 LB |
231 | } |
232 | #endif | |
233 | ||
73566edf LB |
234 | static struct platform_driver physmap_flash_driver = { |
235 | .probe = physmap_flash_probe, | |
236 | .remove = physmap_flash_remove, | |
17c2dae3 LB |
237 | #ifdef CONFIG_PM |
238 | .suspend = physmap_flash_suspend, | |
239 | .resume = physmap_flash_resume, | |
240 | .shutdown = physmap_flash_shutdown, | |
241 | #endif | |
73566edf LB |
242 | .driver = { |
243 | .name = "physmap-flash", | |
244 | }, | |
245 | }; | |
1da177e4 | 246 | |
1da177e4 | 247 | |
73566edf LB |
248 | #ifdef CONFIG_MTD_PHYSMAP_LEN |
249 | #if CONFIG_MTD_PHYSMAP_LEN != 0 | |
250 | #warning using PHYSMAP compat code | |
251 | #define PHYSMAP_COMPAT | |
252 | #endif | |
1da177e4 | 253 | #endif |
1da177e4 | 254 | |
73566edf LB |
255 | #ifdef PHYSMAP_COMPAT |
256 | static struct physmap_flash_data physmap_flash_data = { | |
257 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
258 | }; | |
1da177e4 | 259 | |
73566edf LB |
260 | static struct resource physmap_flash_resource = { |
261 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 262 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
263 | .flags = IORESOURCE_MEM, |
264 | }; | |
1da177e4 | 265 | |
73566edf LB |
266 | static struct platform_device physmap_flash = { |
267 | .name = "physmap-flash", | |
268 | .id = 0, | |
269 | .dev = { | |
270 | .platform_data = &physmap_flash_data, | |
271 | }, | |
272 | .num_resources = 1, | |
273 | .resource = &physmap_flash_resource, | |
274 | }; | |
275 | ||
276 | void physmap_configure(unsigned long addr, unsigned long size, | |
277 | int bankwidth, void (*set_vpp)(struct map_info *, int)) | |
1da177e4 | 278 | { |
73566edf LB |
279 | physmap_flash_resource.start = addr; |
280 | physmap_flash_resource.end = addr + size - 1; | |
281 | physmap_flash_data.width = bankwidth; | |
282 | physmap_flash_data.set_vpp = set_vpp; | |
283 | } | |
284 | ||
1da177e4 | 285 | #ifdef CONFIG_MTD_PARTITIONS |
73566edf LB |
286 | void physmap_set_partitions(struct mtd_partition *parts, int num_parts) |
287 | { | |
288 | physmap_flash_data.nr_parts = num_parts; | |
289 | physmap_flash_data.parts = parts; | |
290 | } | |
291 | #endif | |
1da177e4 | 292 | #endif |
1da177e4 | 293 | |
73566edf LB |
294 | static int __init physmap_init(void) |
295 | { | |
296 | int err; | |
297 | ||
298 | err = platform_driver_register(&physmap_flash_driver); | |
299 | #ifdef PHYSMAP_COMPAT | |
300 | if (err == 0) | |
301 | platform_device_register(&physmap_flash); | |
302 | #endif | |
303 | ||
304 | return err; | |
1da177e4 LT |
305 | } |
306 | ||
73566edf LB |
307 | static void __exit physmap_exit(void) |
308 | { | |
309 | #ifdef PHYSMAP_COMPAT | |
310 | platform_device_unregister(&physmap_flash); | |
311 | #endif | |
312 | platform_driver_unregister(&physmap_flash_driver); | |
313 | } | |
1da177e4 | 314 | |
73566edf LB |
315 | module_init(physmap_init); |
316 | module_exit(physmap_exit); | |
1da177e4 LT |
317 | |
318 | MODULE_LICENSE("GPL"); | |
319 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
320 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); |