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