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; | |
e480814f | 32 | struct mtd_partition *parts; |
73566edf | 33 | #endif |
1da177e4 LT |
34 | }; |
35 | ||
73566edf LB |
36 | static int physmap_flash_remove(struct platform_device *dev) |
37 | { | |
38 | struct physmap_flash_info *info; | |
39 | struct physmap_flash_data *physmap_data; | |
df66e716 | 40 | int i; |
73566edf LB |
41 | |
42 | info = platform_get_drvdata(dev); | |
43 | if (info == NULL) | |
44 | return 0; | |
45 | platform_set_drvdata(dev, NULL); | |
46 | ||
47 | physmap_data = dev->dev.platform_data; | |
48 | ||
8ce110ac HS |
49 | if (info->cmtd) { |
50 | #ifdef CONFIG_MTD_PARTITIONS | |
4b56ffca | 51 | if (info->nr_parts || physmap_data->nr_parts) { |
d58ab5cf | 52 | del_mtd_partitions(info->cmtd); |
4b56ffca HS |
53 | |
54 | if (info->nr_parts) | |
55 | kfree(info->parts); | |
56 | } else { | |
d58ab5cf | 57 | del_mtd_device(info->cmtd); |
4b56ffca | 58 | } |
8ce110ac | 59 | #else |
d58ab5cf | 60 | del_mtd_device(info->cmtd); |
8ce110ac | 61 | #endif |
e480814f | 62 | #ifdef CONFIG_MTD_CONCAT |
8ce110ac HS |
63 | if (info->cmtd != info->mtd[0]) |
64 | mtd_concat_destroy(info->cmtd); | |
df66e716 | 65 | #endif |
8ce110ac | 66 | } |
df66e716 SR |
67 | |
68 | for (i = 0; i < MAX_RESOURCES; i++) { | |
e480814f | 69 | if (info->mtd[i] != NULL) |
df66e716 | 70 | map_destroy(info->mtd[i]); |
73566edf | 71 | } |
73566edf | 72 | return 0; |
1da177e4 | 73 | } |
1da177e4 | 74 | |
d8140830 AK |
75 | static const char *rom_probe_types[] = { |
76 | "cfi_probe", | |
77 | "jedec_probe", | |
78 | "qinfo_probe", | |
79 | "map_rom", | |
80 | NULL }; | |
73566edf LB |
81 | #ifdef CONFIG_MTD_PARTITIONS |
82 | static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL }; | |
83 | #endif | |
84 | ||
85 | static int physmap_flash_probe(struct platform_device *dev) | |
1da177e4 | 86 | { |
73566edf LB |
87 | struct physmap_flash_data *physmap_data; |
88 | struct physmap_flash_info *info; | |
89 | const char **probe_type; | |
df66e716 SR |
90 | int err = 0; |
91 | int i; | |
92 | int devices_found = 0; | |
73566edf LB |
93 | |
94 | physmap_data = dev->dev.platform_data; | |
95 | if (physmap_data == NULL) | |
96 | return -ENODEV; | |
97 | ||
3136e903 AN |
98 | info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info), |
99 | GFP_KERNEL); | |
73566edf LB |
100 | if (info == NULL) { |
101 | err = -ENOMEM; | |
102 | goto err_out; | |
103 | } | |
1da177e4 | 104 | |
73566edf | 105 | platform_set_drvdata(dev, info); |
1da177e4 | 106 | |
df66e716 SR |
107 | for (i = 0; i < dev->num_resources; i++) { |
108 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
109 | (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1), | |
110 | (unsigned long long)dev->resource[i].start); | |
111 | ||
3136e903 AN |
112 | if (!devm_request_mem_region(&dev->dev, |
113 | dev->resource[i].start, | |
114 | dev->resource[i].end - dev->resource[i].start + 1, | |
160bbab3 | 115 | dev_name(&dev->dev))) { |
df66e716 SR |
116 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
117 | err = -ENOMEM; | |
118 | goto err_out; | |
119 | } | |
1da177e4 | 120 | |
160bbab3 | 121 | info->map[i].name = dev_name(&dev->dev); |
df66e716 SR |
122 | info->map[i].phys = dev->resource[i].start; |
123 | info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1; | |
124 | info->map[i].bankwidth = physmap_data->width; | |
125 | info->map[i].set_vpp = physmap_data->set_vpp; | |
d8140830 | 126 | info->map[i].pfow_base = physmap_data->pfow_base; |
df66e716 | 127 | |
3136e903 AN |
128 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
129 | info->map[i].size); | |
df66e716 SR |
130 | if (info->map[i].virt == NULL) { |
131 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
895fb494 | 132 | err = -EIO; |
df66e716 SR |
133 | goto err_out; |
134 | } | |
73566edf | 135 | |
df66e716 | 136 | simple_map_init(&info->map[i]); |
1da177e4 | 137 | |
df66e716 SR |
138 | probe_type = rom_probe_types; |
139 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
140 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
141 | if (info->mtd[i] == NULL) { | |
142 | dev_err(&dev->dev, "map_probe failed\n"); | |
143 | err = -ENXIO; | |
144 | goto err_out; | |
145 | } else { | |
146 | devices_found++; | |
147 | } | |
148 | info->mtd[i]->owner = THIS_MODULE; | |
87f39f04 | 149 | info->mtd[i]->dev.parent = &dev->dev; |
df66e716 | 150 | } |
73566edf | 151 | |
df66e716 SR |
152 | if (devices_found == 1) { |
153 | info->cmtd = info->mtd[0]; | |
154 | } else if (devices_found > 1) { | |
155 | /* | |
156 | * We detected multiple devices. Concatenate them together. | |
157 | */ | |
158 | #ifdef CONFIG_MTD_CONCAT | |
160bbab3 | 159 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
df66e716 SR |
160 | if (info->cmtd == NULL) |
161 | err = -ENXIO; | |
162 | #else | |
163 | printk(KERN_ERR "physmap-flash: multiple devices " | |
164 | "found but MTD concat support disabled.\n"); | |
73566edf | 165 | err = -ENXIO; |
df66e716 | 166 | #endif |
1da177e4 | 167 | } |
df66e716 SR |
168 | if (err) |
169 | goto err_out; | |
1da177e4 | 170 | |
8ce110ac HS |
171 | #ifdef CONFIG_MTD_PARTITIONS |
172 | err = parse_mtd_partitions(info->cmtd, part_probe_types, | |
173 | &info->parts, 0); | |
174 | if (err > 0) { | |
175 | add_mtd_partitions(info->cmtd, info->parts, err); | |
176 | info->nr_parts = err; | |
177 | return 0; | |
178 | } | |
1da177e4 | 179 | |
8ce110ac HS |
180 | if (physmap_data->nr_parts) { |
181 | printk(KERN_NOTICE "Using physmap partition information\n"); | |
182 | add_mtd_partitions(info->cmtd, physmap_data->parts, | |
183 | physmap_data->nr_parts); | |
184 | return 0; | |
73566edf | 185 | } |
8ce110ac | 186 | #endif |
73566edf | 187 | |
df66e716 | 188 | add_mtd_device(info->cmtd); |
73566edf LB |
189 | return 0; |
190 | ||
191 | err_out: | |
192 | physmap_flash_remove(dev); | |
193 | return err; | |
194 | } | |
195 | ||
17c2dae3 | 196 | #ifdef CONFIG_PM |
17c2dae3 LB |
197 | static void physmap_flash_shutdown(struct platform_device *dev) |
198 | { | |
199 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
200 | int i; |
201 | ||
4a5691c0 | 202 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
7b249191 RJ |
203 | if (info->mtd[i]->suspend && info->mtd[i]->resume) |
204 | if (info->mtd[i]->suspend(info->mtd[i]) == 0) | |
205 | info->mtd[i]->resume(info->mtd[i]); | |
17c2dae3 | 206 | } |
d5476689 | 207 | #else |
d5476689 | 208 | #define physmap_flash_shutdown NULL |
17c2dae3 LB |
209 | #endif |
210 | ||
73566edf LB |
211 | static struct platform_driver physmap_flash_driver = { |
212 | .probe = physmap_flash_probe, | |
213 | .remove = physmap_flash_remove, | |
17c2dae3 | 214 | .shutdown = physmap_flash_shutdown, |
73566edf LB |
215 | .driver = { |
216 | .name = "physmap-flash", | |
41d867c9 | 217 | .owner = THIS_MODULE, |
73566edf LB |
218 | }, |
219 | }; | |
1da177e4 | 220 | |
1da177e4 | 221 | |
dcb3e137 | 222 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
223 | static struct physmap_flash_data physmap_flash_data = { |
224 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
225 | }; | |
1da177e4 | 226 | |
73566edf LB |
227 | static struct resource physmap_flash_resource = { |
228 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 229 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
230 | .flags = IORESOURCE_MEM, |
231 | }; | |
1da177e4 | 232 | |
73566edf LB |
233 | static struct platform_device physmap_flash = { |
234 | .name = "physmap-flash", | |
235 | .id = 0, | |
236 | .dev = { | |
237 | .platform_data = &physmap_flash_data, | |
238 | }, | |
239 | .num_resources = 1, | |
240 | .resource = &physmap_flash_resource, | |
241 | }; | |
242 | ||
243 | void physmap_configure(unsigned long addr, unsigned long size, | |
244 | int bankwidth, void (*set_vpp)(struct map_info *, int)) | |
1da177e4 | 245 | { |
73566edf LB |
246 | physmap_flash_resource.start = addr; |
247 | physmap_flash_resource.end = addr + size - 1; | |
248 | physmap_flash_data.width = bankwidth; | |
249 | physmap_flash_data.set_vpp = set_vpp; | |
250 | } | |
251 | ||
1da177e4 | 252 | #ifdef CONFIG_MTD_PARTITIONS |
73566edf LB |
253 | void physmap_set_partitions(struct mtd_partition *parts, int num_parts) |
254 | { | |
255 | physmap_flash_data.nr_parts = num_parts; | |
256 | physmap_flash_data.parts = parts; | |
257 | } | |
258 | #endif | |
1da177e4 | 259 | #endif |
1da177e4 | 260 | |
73566edf LB |
261 | static int __init physmap_init(void) |
262 | { | |
263 | int err; | |
264 | ||
265 | err = platform_driver_register(&physmap_flash_driver); | |
dcb3e137 | 266 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
1ca5d2f0 HS |
267 | if (err == 0) { |
268 | err = platform_device_register(&physmap_flash); | |
269 | if (err) | |
270 | platform_driver_unregister(&physmap_flash_driver); | |
271 | } | |
73566edf LB |
272 | #endif |
273 | ||
274 | return err; | |
1da177e4 LT |
275 | } |
276 | ||
73566edf LB |
277 | static void __exit physmap_exit(void) |
278 | { | |
dcb3e137 | 279 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
280 | platform_device_unregister(&physmap_flash); |
281 | #endif | |
282 | platform_driver_unregister(&physmap_flash_driver); | |
283 | } | |
1da177e4 | 284 | |
73566edf LB |
285 | module_init(physmap_init); |
286 | module_exit(physmap_exit); | |
1da177e4 LT |
287 | |
288 | MODULE_LICENSE("GPL"); | |
289 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
290 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); | |
41d867c9 KS |
291 | |
292 | /* legacy platform drivers can't hotplug or coldplg */ | |
dcb3e137 | 293 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
41d867c9 KS |
294 | /* work with hotplug and coldplug */ |
295 | MODULE_ALIAS("platform:physmap-flash"); | |
296 | #endif |