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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]; | |
1da177e4 LT |
30 | }; |
31 | ||
73566edf LB |
32 | static int physmap_flash_remove(struct platform_device *dev) |
33 | { | |
34 | struct physmap_flash_info *info; | |
35 | struct physmap_flash_data *physmap_data; | |
df66e716 | 36 | int i; |
73566edf LB |
37 | |
38 | info = platform_get_drvdata(dev); | |
39 | if (info == NULL) | |
40 | return 0; | |
41 | platform_set_drvdata(dev, NULL); | |
42 | ||
43 | physmap_data = dev->dev.platform_data; | |
44 | ||
8ce110ac | 45 | if (info->cmtd) { |
984e6d8e | 46 | mtd_device_unregister(info->cmtd); |
8ce110ac HS |
47 | if (info->cmtd != info->mtd[0]) |
48 | mtd_concat_destroy(info->cmtd); | |
8ce110ac | 49 | } |
df66e716 SR |
50 | |
51 | for (i = 0; i < MAX_RESOURCES; i++) { | |
e480814f | 52 | if (info->mtd[i] != NULL) |
df66e716 | 53 | map_destroy(info->mtd[i]); |
73566edf | 54 | } |
b7281ca2 MZ |
55 | |
56 | if (physmap_data->exit) | |
57 | physmap_data->exit(dev); | |
58 | ||
73566edf | 59 | return 0; |
1da177e4 | 60 | } |
1da177e4 | 61 | |
667f390b MZ |
62 | static void physmap_set_vpp(struct map_info *map, int state) |
63 | { | |
64 | struct platform_device *pdev; | |
65 | struct physmap_flash_data *physmap_data; | |
66 | ||
67 | pdev = (struct platform_device *)map->map_priv_1; | |
68 | physmap_data = pdev->dev.platform_data; | |
69 | ||
70 | if (physmap_data->set_vpp) | |
71 | physmap_data->set_vpp(pdev, state); | |
72 | } | |
73 | ||
d8140830 AK |
74 | static const char *rom_probe_types[] = { |
75 | "cfi_probe", | |
76 | "jedec_probe", | |
77 | "qinfo_probe", | |
78 | "map_rom", | |
79 | NULL }; | |
667f390b | 80 | static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs", |
b7281ca2 | 81 | NULL }; |
73566edf LB |
82 | |
83 | static int physmap_flash_probe(struct platform_device *dev) | |
1da177e4 | 84 | { |
73566edf LB |
85 | struct physmap_flash_data *physmap_data; |
86 | struct physmap_flash_info *info; | |
87 | const char **probe_type; | |
529688fe | 88 | const char **part_types; |
df66e716 SR |
89 | int err = 0; |
90 | int i; | |
91 | int devices_found = 0; | |
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 | |
b7281ca2 MZ |
104 | if (physmap_data->init) { |
105 | err = physmap_data->init(dev); | |
106 | if (err) | |
107 | goto err_out; | |
108 | } | |
109 | ||
73566edf | 110 | platform_set_drvdata(dev, info); |
1da177e4 | 111 | |
df66e716 SR |
112 | for (i = 0; i < dev->num_resources; i++) { |
113 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
1d90d2c3 | 114 | (unsigned long long)resource_size(&dev->resource[i]), |
df66e716 SR |
115 | (unsigned long long)dev->resource[i].start); |
116 | ||
3136e903 AN |
117 | if (!devm_request_mem_region(&dev->dev, |
118 | dev->resource[i].start, | |
1d90d2c3 | 119 | resource_size(&dev->resource[i]), |
160bbab3 | 120 | dev_name(&dev->dev))) { |
df66e716 SR |
121 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
122 | err = -ENOMEM; | |
123 | goto err_out; | |
124 | } | |
1da177e4 | 125 | |
160bbab3 | 126 | info->map[i].name = dev_name(&dev->dev); |
df66e716 | 127 | info->map[i].phys = dev->resource[i].start; |
1d90d2c3 | 128 | info->map[i].size = resource_size(&dev->resource[i]); |
df66e716 | 129 | info->map[i].bankwidth = physmap_data->width; |
667f390b | 130 | info->map[i].set_vpp = physmap_set_vpp; |
d8140830 | 131 | info->map[i].pfow_base = physmap_data->pfow_base; |
667f390b | 132 | info->map[i].map_priv_1 = (unsigned long)dev; |
df66e716 | 133 | |
3136e903 AN |
134 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
135 | info->map[i].size); | |
df66e716 SR |
136 | if (info->map[i].virt == NULL) { |
137 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
895fb494 | 138 | err = -EIO; |
df66e716 SR |
139 | goto err_out; |
140 | } | |
73566edf | 141 | |
df66e716 | 142 | simple_map_init(&info->map[i]); |
1da177e4 | 143 | |
df66e716 | 144 | probe_type = rom_probe_types; |
78ef7fab BS |
145 | if (physmap_data->probe_type == NULL) { |
146 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
147 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
148 | } else | |
149 | info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]); | |
150 | ||
df66e716 SR |
151 | if (info->mtd[i] == NULL) { |
152 | dev_err(&dev->dev, "map_probe failed\n"); | |
153 | err = -ENXIO; | |
154 | goto err_out; | |
155 | } else { | |
156 | devices_found++; | |
157 | } | |
158 | info->mtd[i]->owner = THIS_MODULE; | |
87f39f04 | 159 | info->mtd[i]->dev.parent = &dev->dev; |
df66e716 | 160 | } |
73566edf | 161 | |
df66e716 SR |
162 | if (devices_found == 1) { |
163 | info->cmtd = info->mtd[0]; | |
164 | } else if (devices_found > 1) { | |
165 | /* | |
166 | * We detected multiple devices. Concatenate them together. | |
167 | */ | |
160bbab3 | 168 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
df66e716 SR |
169 | if (info->cmtd == NULL) |
170 | err = -ENXIO; | |
1da177e4 | 171 | } |
df66e716 SR |
172 | if (err) |
173 | goto err_out; | |
1da177e4 | 174 | |
529688fe JG |
175 | part_types = physmap_data->part_probe_types ? : part_probe_types; |
176 | ||
177 | mtd_device_parse_register(info->cmtd, part_types, 0, | |
d45fd121 | 178 | physmap_data->parts, physmap_data->nr_parts); |
73566edf LB |
179 | return 0; |
180 | ||
181 | err_out: | |
182 | physmap_flash_remove(dev); | |
183 | return err; | |
184 | } | |
185 | ||
17c2dae3 | 186 | #ifdef CONFIG_PM |
17c2dae3 LB |
187 | static void physmap_flash_shutdown(struct platform_device *dev) |
188 | { | |
189 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
190 | int i; |
191 | ||
4a5691c0 | 192 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
079c985e AB |
193 | if (mtd_suspend(info->mtd[i]) == 0) |
194 | mtd_resume(info->mtd[i]); | |
17c2dae3 | 195 | } |
d5476689 | 196 | #else |
d5476689 | 197 | #define physmap_flash_shutdown NULL |
17c2dae3 LB |
198 | #endif |
199 | ||
73566edf LB |
200 | static struct platform_driver physmap_flash_driver = { |
201 | .probe = physmap_flash_probe, | |
202 | .remove = physmap_flash_remove, | |
17c2dae3 | 203 | .shutdown = physmap_flash_shutdown, |
73566edf LB |
204 | .driver = { |
205 | .name = "physmap-flash", | |
41d867c9 | 206 | .owner = THIS_MODULE, |
73566edf LB |
207 | }, |
208 | }; | |
1da177e4 | 209 | |
1da177e4 | 210 | |
dcb3e137 | 211 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
212 | static struct physmap_flash_data physmap_flash_data = { |
213 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
214 | }; | |
1da177e4 | 215 | |
73566edf LB |
216 | static struct resource physmap_flash_resource = { |
217 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 218 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
219 | .flags = IORESOURCE_MEM, |
220 | }; | |
1da177e4 | 221 | |
73566edf LB |
222 | static struct platform_device physmap_flash = { |
223 | .name = "physmap-flash", | |
224 | .id = 0, | |
225 | .dev = { | |
226 | .platform_data = &physmap_flash_data, | |
227 | }, | |
228 | .num_resources = 1, | |
229 | .resource = &physmap_flash_resource, | |
230 | }; | |
73566edf | 231 | #endif |
1da177e4 | 232 | |
73566edf LB |
233 | static int __init physmap_init(void) |
234 | { | |
235 | int err; | |
236 | ||
237 | err = platform_driver_register(&physmap_flash_driver); | |
dcb3e137 | 238 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
1ca5d2f0 HS |
239 | if (err == 0) { |
240 | err = platform_device_register(&physmap_flash); | |
241 | if (err) | |
242 | platform_driver_unregister(&physmap_flash_driver); | |
243 | } | |
73566edf LB |
244 | #endif |
245 | ||
246 | return err; | |
1da177e4 LT |
247 | } |
248 | ||
73566edf LB |
249 | static void __exit physmap_exit(void) |
250 | { | |
dcb3e137 | 251 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
252 | platform_device_unregister(&physmap_flash); |
253 | #endif | |
254 | platform_driver_unregister(&physmap_flash_driver); | |
255 | } | |
1da177e4 | 256 | |
73566edf LB |
257 | module_init(physmap_init); |
258 | module_exit(physmap_exit); | |
1da177e4 LT |
259 | |
260 | MODULE_LICENSE("GPL"); | |
261 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
262 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); | |
41d867c9 KS |
263 | |
264 | /* legacy platform drivers can't hotplug or coldplg */ | |
dcb3e137 | 265 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
41d867c9 KS |
266 | /* work with hotplug and coldplug */ |
267 | MODULE_ALIAS("platform:physmap-flash"); | |
268 | #endif |