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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; | |
df66e716 SR |
88 | int err = 0; |
89 | int i; | |
90 | int devices_found = 0; | |
73566edf LB |
91 | |
92 | physmap_data = dev->dev.platform_data; | |
93 | if (physmap_data == NULL) | |
94 | return -ENODEV; | |
95 | ||
3136e903 AN |
96 | info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info), |
97 | GFP_KERNEL); | |
73566edf LB |
98 | if (info == NULL) { |
99 | err = -ENOMEM; | |
100 | goto err_out; | |
101 | } | |
1da177e4 | 102 | |
b7281ca2 MZ |
103 | if (physmap_data->init) { |
104 | err = physmap_data->init(dev); | |
105 | if (err) | |
106 | goto err_out; | |
107 | } | |
108 | ||
73566edf | 109 | platform_set_drvdata(dev, info); |
1da177e4 | 110 | |
df66e716 SR |
111 | for (i = 0; i < dev->num_resources; i++) { |
112 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
1d90d2c3 | 113 | (unsigned long long)resource_size(&dev->resource[i]), |
df66e716 SR |
114 | (unsigned long long)dev->resource[i].start); |
115 | ||
3136e903 AN |
116 | if (!devm_request_mem_region(&dev->dev, |
117 | dev->resource[i].start, | |
1d90d2c3 | 118 | resource_size(&dev->resource[i]), |
160bbab3 | 119 | dev_name(&dev->dev))) { |
df66e716 SR |
120 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
121 | err = -ENOMEM; | |
122 | goto err_out; | |
123 | } | |
1da177e4 | 124 | |
160bbab3 | 125 | info->map[i].name = dev_name(&dev->dev); |
df66e716 | 126 | info->map[i].phys = dev->resource[i].start; |
1d90d2c3 | 127 | info->map[i].size = resource_size(&dev->resource[i]); |
df66e716 | 128 | info->map[i].bankwidth = physmap_data->width; |
667f390b | 129 | info->map[i].set_vpp = physmap_set_vpp; |
d8140830 | 130 | info->map[i].pfow_base = physmap_data->pfow_base; |
667f390b | 131 | info->map[i].map_priv_1 = (unsigned long)dev; |
df66e716 | 132 | |
3136e903 AN |
133 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
134 | info->map[i].size); | |
df66e716 SR |
135 | if (info->map[i].virt == NULL) { |
136 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
895fb494 | 137 | err = -EIO; |
df66e716 SR |
138 | goto err_out; |
139 | } | |
73566edf | 140 | |
df66e716 | 141 | simple_map_init(&info->map[i]); |
1da177e4 | 142 | |
df66e716 | 143 | probe_type = rom_probe_types; |
78ef7fab BS |
144 | if (physmap_data->probe_type == NULL) { |
145 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
146 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
147 | } else | |
148 | info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]); | |
149 | ||
df66e716 SR |
150 | if (info->mtd[i] == NULL) { |
151 | dev_err(&dev->dev, "map_probe failed\n"); | |
152 | err = -ENXIO; | |
153 | goto err_out; | |
154 | } else { | |
155 | devices_found++; | |
156 | } | |
157 | info->mtd[i]->owner = THIS_MODULE; | |
87f39f04 | 158 | info->mtd[i]->dev.parent = &dev->dev; |
df66e716 | 159 | } |
73566edf | 160 | |
df66e716 SR |
161 | if (devices_found == 1) { |
162 | info->cmtd = info->mtd[0]; | |
163 | } else if (devices_found > 1) { | |
164 | /* | |
165 | * We detected multiple devices. Concatenate them together. | |
166 | */ | |
160bbab3 | 167 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
df66e716 SR |
168 | if (info->cmtd == NULL) |
169 | err = -ENXIO; | |
1da177e4 | 170 | } |
df66e716 SR |
171 | if (err) |
172 | goto err_out; | |
1da177e4 | 173 | |
d45fd121 DES |
174 | mtd_device_parse_register(info->cmtd, part_probe_types, 0, |
175 | physmap_data->parts, physmap_data->nr_parts); | |
73566edf LB |
176 | return 0; |
177 | ||
178 | err_out: | |
179 | physmap_flash_remove(dev); | |
180 | return err; | |
181 | } | |
182 | ||
17c2dae3 | 183 | #ifdef CONFIG_PM |
17c2dae3 LB |
184 | static void physmap_flash_shutdown(struct platform_device *dev) |
185 | { | |
186 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
187 | int i; |
188 | ||
4a5691c0 | 189 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
7b249191 RJ |
190 | if (info->mtd[i]->suspend && info->mtd[i]->resume) |
191 | if (info->mtd[i]->suspend(info->mtd[i]) == 0) | |
192 | info->mtd[i]->resume(info->mtd[i]); | |
17c2dae3 | 193 | } |
d5476689 | 194 | #else |
d5476689 | 195 | #define physmap_flash_shutdown NULL |
17c2dae3 LB |
196 | #endif |
197 | ||
73566edf LB |
198 | static struct platform_driver physmap_flash_driver = { |
199 | .probe = physmap_flash_probe, | |
200 | .remove = physmap_flash_remove, | |
17c2dae3 | 201 | .shutdown = physmap_flash_shutdown, |
73566edf LB |
202 | .driver = { |
203 | .name = "physmap-flash", | |
41d867c9 | 204 | .owner = THIS_MODULE, |
73566edf LB |
205 | }, |
206 | }; | |
1da177e4 | 207 | |
1da177e4 | 208 | |
dcb3e137 | 209 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
210 | static struct physmap_flash_data physmap_flash_data = { |
211 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
212 | }; | |
1da177e4 | 213 | |
73566edf LB |
214 | static struct resource physmap_flash_resource = { |
215 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 216 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
217 | .flags = IORESOURCE_MEM, |
218 | }; | |
1da177e4 | 219 | |
73566edf LB |
220 | static struct platform_device physmap_flash = { |
221 | .name = "physmap-flash", | |
222 | .id = 0, | |
223 | .dev = { | |
224 | .platform_data = &physmap_flash_data, | |
225 | }, | |
226 | .num_resources = 1, | |
227 | .resource = &physmap_flash_resource, | |
228 | }; | |
73566edf | 229 | #endif |
1da177e4 | 230 | |
73566edf LB |
231 | static int __init physmap_init(void) |
232 | { | |
233 | int err; | |
234 | ||
235 | err = platform_driver_register(&physmap_flash_driver); | |
dcb3e137 | 236 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
1ca5d2f0 HS |
237 | if (err == 0) { |
238 | err = platform_device_register(&physmap_flash); | |
239 | if (err) | |
240 | platform_driver_unregister(&physmap_flash_driver); | |
241 | } | |
73566edf LB |
242 | #endif |
243 | ||
244 | return err; | |
1da177e4 LT |
245 | } |
246 | ||
73566edf LB |
247 | static void __exit physmap_exit(void) |
248 | { | |
dcb3e137 | 249 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
250 | platform_device_unregister(&physmap_flash); |
251 | #endif | |
252 | platform_driver_unregister(&physmap_flash_driver); | |
253 | } | |
1da177e4 | 254 | |
73566edf LB |
255 | module_init(physmap_init); |
256 | module_exit(physmap_exit); | |
1da177e4 LT |
257 | |
258 | MODULE_LICENSE("GPL"); | |
259 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
260 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); | |
41d867c9 KS |
261 | |
262 | /* legacy platform drivers can't hotplug or coldplg */ | |
dcb3e137 | 263 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
41d867c9 KS |
264 | /* work with hotplug and coldplug */ |
265 | MODULE_ALIAS("platform:physmap-flash"); | |
266 | #endif |