Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Normal mappings of chips in physical memory |
3 | * | |
4 | * Copyright (C) 2003 MontaVista Software Inc. | |
5 | * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net | |
6 | * | |
7 | * 031022 - [jsun] add run-time configure and partition setup | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/slab.h> | |
73566edf LB |
15 | #include <linux/device.h> |
16 | #include <linux/platform_device.h> | |
1da177e4 LT |
17 | #include <linux/mtd/mtd.h> |
18 | #include <linux/mtd/map.h> | |
1da177e4 | 19 | #include <linux/mtd/partitions.h> |
2b9175c1 | 20 | #include <linux/mtd/physmap.h> |
df66e716 | 21 | #include <linux/mtd/concat.h> |
3136e903 | 22 | #include <linux/io.h> |
1da177e4 | 23 | |
df66e716 SR |
24 | #define MAX_RESOURCES 4 |
25 | ||
73566edf | 26 | struct physmap_flash_info { |
df66e716 SR |
27 | struct mtd_info *mtd[MAX_RESOURCES]; |
28 | struct mtd_info *cmtd; | |
29 | struct map_info map[MAX_RESOURCES]; | |
73566edf LB |
30 | #ifdef CONFIG_MTD_PARTITIONS |
31 | int nr_parts; | |
73566edf | 32 | #endif |
1da177e4 LT |
33 | }; |
34 | ||
73566edf LB |
35 | static int physmap_flash_remove(struct platform_device *dev) |
36 | { | |
37 | struct physmap_flash_info *info; | |
38 | struct physmap_flash_data *physmap_data; | |
df66e716 | 39 | int i; |
73566edf LB |
40 | |
41 | info = platform_get_drvdata(dev); | |
42 | if (info == NULL) | |
43 | return 0; | |
44 | platform_set_drvdata(dev, NULL); | |
45 | ||
46 | physmap_data = dev->dev.platform_data; | |
47 | ||
df66e716 SR |
48 | #ifdef CONFIG_MTD_CONCAT |
49 | if (info->cmtd != info->mtd[0]) { | |
50 | del_mtd_device(info->cmtd); | |
51 | mtd_concat_destroy(info->cmtd); | |
52 | } | |
53 | #endif | |
54 | ||
55 | for (i = 0; i < MAX_RESOURCES; i++) { | |
56 | if (info->mtd[i] != NULL) { | |
1da177e4 | 57 | #ifdef CONFIG_MTD_PARTITIONS |
176bf2e0 | 58 | if (info->nr_parts || physmap_data->nr_parts) |
df66e716 | 59 | del_mtd_partitions(info->mtd[i]); |
176bf2e0 | 60 | else |
df66e716 | 61 | del_mtd_device(info->mtd[i]); |
73566edf | 62 | #else |
df66e716 | 63 | del_mtd_device(info->mtd[i]); |
73566edf | 64 | #endif |
df66e716 SR |
65 | map_destroy(info->mtd[i]); |
66 | } | |
73566edf | 67 | } |
73566edf | 68 | return 0; |
1da177e4 | 69 | } |
1da177e4 | 70 | |
d8140830 AK |
71 | static const char *rom_probe_types[] = { |
72 | "cfi_probe", | |
73 | "jedec_probe", | |
74 | "qinfo_probe", | |
75 | "map_rom", | |
76 | NULL }; | |
73566edf LB |
77 | #ifdef CONFIG_MTD_PARTITIONS |
78 | static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL }; | |
79 | #endif | |
80 | ||
81 | static int physmap_flash_probe(struct platform_device *dev) | |
1da177e4 | 82 | { |
73566edf LB |
83 | struct physmap_flash_data *physmap_data; |
84 | struct physmap_flash_info *info; | |
85 | const char **probe_type; | |
df66e716 SR |
86 | int err = 0; |
87 | int i; | |
88 | int devices_found = 0; | |
176bf2e0 AN |
89 | #ifdef CONFIG_MTD_PARTITIONS |
90 | struct mtd_partition *parts; | |
91 | #endif | |
73566edf LB |
92 | |
93 | physmap_data = dev->dev.platform_data; | |
94 | if (physmap_data == NULL) | |
95 | return -ENODEV; | |
96 | ||
3136e903 AN |
97 | info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info), |
98 | GFP_KERNEL); | |
73566edf LB |
99 | if (info == NULL) { |
100 | err = -ENOMEM; | |
101 | goto err_out; | |
102 | } | |
1da177e4 | 103 | |
73566edf | 104 | platform_set_drvdata(dev, info); |
1da177e4 | 105 | |
df66e716 SR |
106 | for (i = 0; i < dev->num_resources; i++) { |
107 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
108 | (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1), | |
109 | (unsigned long long)dev->resource[i].start); | |
110 | ||
3136e903 AN |
111 | if (!devm_request_mem_region(&dev->dev, |
112 | dev->resource[i].start, | |
113 | dev->resource[i].end - dev->resource[i].start + 1, | |
160bbab3 | 114 | dev_name(&dev->dev))) { |
df66e716 SR |
115 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
116 | err = -ENOMEM; | |
117 | goto err_out; | |
118 | } | |
1da177e4 | 119 | |
160bbab3 | 120 | info->map[i].name = dev_name(&dev->dev); |
df66e716 SR |
121 | info->map[i].phys = dev->resource[i].start; |
122 | info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1; | |
123 | info->map[i].bankwidth = physmap_data->width; | |
124 | info->map[i].set_vpp = physmap_data->set_vpp; | |
d8140830 | 125 | info->map[i].pfow_base = physmap_data->pfow_base; |
df66e716 | 126 | |
3136e903 AN |
127 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
128 | info->map[i].size); | |
df66e716 SR |
129 | if (info->map[i].virt == NULL) { |
130 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
131 | err = EIO; | |
132 | goto err_out; | |
133 | } | |
73566edf | 134 | |
df66e716 | 135 | simple_map_init(&info->map[i]); |
1da177e4 | 136 | |
df66e716 SR |
137 | probe_type = rom_probe_types; |
138 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
139 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
140 | if (info->mtd[i] == NULL) { | |
141 | dev_err(&dev->dev, "map_probe failed\n"); | |
142 | err = -ENXIO; | |
143 | goto err_out; | |
144 | } else { | |
145 | devices_found++; | |
146 | } | |
147 | info->mtd[i]->owner = THIS_MODULE; | |
148 | } | |
73566edf | 149 | |
df66e716 SR |
150 | if (devices_found == 1) { |
151 | info->cmtd = info->mtd[0]; | |
152 | } else if (devices_found > 1) { | |
153 | /* | |
154 | * We detected multiple devices. Concatenate them together. | |
155 | */ | |
156 | #ifdef CONFIG_MTD_CONCAT | |
160bbab3 | 157 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
df66e716 SR |
158 | if (info->cmtd == NULL) |
159 | err = -ENXIO; | |
160 | #else | |
161 | printk(KERN_ERR "physmap-flash: multiple devices " | |
162 | "found but MTD concat support disabled.\n"); | |
73566edf | 163 | err = -ENXIO; |
df66e716 | 164 | #endif |
1da177e4 | 165 | } |
df66e716 SR |
166 | if (err) |
167 | goto err_out; | |
1da177e4 LT |
168 | |
169 | #ifdef CONFIG_MTD_PARTITIONS | |
176bf2e0 | 170 | err = parse_mtd_partitions(info->cmtd, part_probe_types, &parts, 0); |
73566edf | 171 | if (err > 0) { |
176bf2e0 AN |
172 | add_mtd_partitions(info->cmtd, parts, err); |
173 | kfree(parts); | |
73566edf LB |
174 | return 0; |
175 | } | |
1da177e4 | 176 | |
73566edf LB |
177 | if (physmap_data->nr_parts) { |
178 | printk(KERN_NOTICE "Using physmap partition information\n"); | |
df66e716 SR |
179 | add_mtd_partitions(info->cmtd, physmap_data->parts, |
180 | physmap_data->nr_parts); | |
73566edf LB |
181 | return 0; |
182 | } | |
183 | #endif | |
184 | ||
df66e716 | 185 | add_mtd_device(info->cmtd); |
73566edf LB |
186 | return 0; |
187 | ||
188 | err_out: | |
189 | physmap_flash_remove(dev); | |
190 | return err; | |
191 | } | |
192 | ||
17c2dae3 LB |
193 | #ifdef CONFIG_PM |
194 | static int physmap_flash_suspend(struct platform_device *dev, pm_message_t state) | |
195 | { | |
196 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
197 | int ret = 0; | |
df66e716 | 198 | int i; |
17c2dae3 | 199 | |
4a5691c0 | 200 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
4b5e33a7 UKK |
201 | if (info->mtd[i]->suspend) { |
202 | ret = info->mtd[i]->suspend(info->mtd[i]); | |
203 | if (ret) | |
204 | goto fail; | |
205 | } | |
206 | ||
207 | return 0; | |
208 | fail: | |
209 | for (--i; i >= 0; --i) | |
210 | if (info->mtd[i]->suspend) { | |
211 | BUG_ON(!info->mtd[i]->resume); | |
212 | info->mtd[i]->resume(info->mtd[i]); | |
213 | } | |
17c2dae3 LB |
214 | |
215 | return ret; | |
216 | } | |
217 | ||
218 | static int physmap_flash_resume(struct platform_device *dev) | |
219 | { | |
220 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
221 | int i; |
222 | ||
4a5691c0 | 223 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
7b249191 RJ |
224 | if (info->mtd[i]->resume) |
225 | info->mtd[i]->resume(info->mtd[i]); | |
4a5691c0 | 226 | |
17c2dae3 LB |
227 | return 0; |
228 | } | |
229 | ||
230 | static void physmap_flash_shutdown(struct platform_device *dev) | |
231 | { | |
232 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
233 | int i; |
234 | ||
4a5691c0 | 235 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
7b249191 RJ |
236 | if (info->mtd[i]->suspend && info->mtd[i]->resume) |
237 | if (info->mtd[i]->suspend(info->mtd[i]) == 0) | |
238 | info->mtd[i]->resume(info->mtd[i]); | |
17c2dae3 | 239 | } |
d5476689 | 240 | #else |
241 | #define physmap_flash_suspend NULL | |
242 | #define physmap_flash_resume NULL | |
243 | #define physmap_flash_shutdown NULL | |
17c2dae3 LB |
244 | #endif |
245 | ||
73566edf LB |
246 | static struct platform_driver physmap_flash_driver = { |
247 | .probe = physmap_flash_probe, | |
248 | .remove = physmap_flash_remove, | |
17c2dae3 LB |
249 | .suspend = physmap_flash_suspend, |
250 | .resume = physmap_flash_resume, | |
251 | .shutdown = physmap_flash_shutdown, | |
73566edf LB |
252 | .driver = { |
253 | .name = "physmap-flash", | |
41d867c9 | 254 | .owner = THIS_MODULE, |
73566edf LB |
255 | }, |
256 | }; | |
1da177e4 | 257 | |
1da177e4 | 258 | |
dcb3e137 | 259 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
260 | static struct physmap_flash_data physmap_flash_data = { |
261 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
262 | }; | |
1da177e4 | 263 | |
73566edf LB |
264 | static struct resource physmap_flash_resource = { |
265 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 266 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
267 | .flags = IORESOURCE_MEM, |
268 | }; | |
1da177e4 | 269 | |
73566edf LB |
270 | static struct platform_device physmap_flash = { |
271 | .name = "physmap-flash", | |
272 | .id = 0, | |
273 | .dev = { | |
274 | .platform_data = &physmap_flash_data, | |
275 | }, | |
276 | .num_resources = 1, | |
277 | .resource = &physmap_flash_resource, | |
278 | }; | |
279 | ||
280 | void physmap_configure(unsigned long addr, unsigned long size, | |
281 | int bankwidth, void (*set_vpp)(struct map_info *, int)) | |
1da177e4 | 282 | { |
73566edf LB |
283 | physmap_flash_resource.start = addr; |
284 | physmap_flash_resource.end = addr + size - 1; | |
285 | physmap_flash_data.width = bankwidth; | |
286 | physmap_flash_data.set_vpp = set_vpp; | |
287 | } | |
288 | ||
1da177e4 | 289 | #ifdef CONFIG_MTD_PARTITIONS |
73566edf LB |
290 | void physmap_set_partitions(struct mtd_partition *parts, int num_parts) |
291 | { | |
292 | physmap_flash_data.nr_parts = num_parts; | |
293 | physmap_flash_data.parts = parts; | |
294 | } | |
295 | #endif | |
1da177e4 | 296 | #endif |
1da177e4 | 297 | |
73566edf LB |
298 | static int __init physmap_init(void) |
299 | { | |
300 | int err; | |
301 | ||
302 | err = platform_driver_register(&physmap_flash_driver); | |
dcb3e137 | 303 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
304 | if (err == 0) |
305 | platform_device_register(&physmap_flash); | |
306 | #endif | |
307 | ||
308 | return err; | |
1da177e4 LT |
309 | } |
310 | ||
73566edf LB |
311 | static void __exit physmap_exit(void) |
312 | { | |
dcb3e137 | 313 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
314 | platform_device_unregister(&physmap_flash); |
315 | #endif | |
316 | platform_driver_unregister(&physmap_flash_driver); | |
317 | } | |
1da177e4 | 318 | |
73566edf LB |
319 | module_init(physmap_init); |
320 | module_exit(physmap_exit); | |
1da177e4 LT |
321 | |
322 | MODULE_LICENSE("GPL"); | |
323 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
324 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); | |
41d867c9 KS |
325 | |
326 | /* legacy platform drivers can't hotplug or coldplg */ | |
dcb3e137 | 327 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
41d867c9 KS |
328 | /* work with hotplug and coldplug */ |
329 | MODULE_ALIAS("platform:physmap-flash"); | |
330 | #endif |