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]; | |
876fe76d PP |
30 | spinlock_t vpp_lock; |
31 | int vpp_refcnt; | |
1da177e4 LT |
32 | }; |
33 | ||
73566edf LB |
34 | static int physmap_flash_remove(struct platform_device *dev) |
35 | { | |
36 | struct physmap_flash_info *info; | |
37 | struct physmap_flash_data *physmap_data; | |
df66e716 | 38 | int i; |
73566edf LB |
39 | |
40 | info = platform_get_drvdata(dev); | |
41 | if (info == NULL) | |
42 | return 0; | |
73566edf | 43 | |
d20d5a57 | 44 | physmap_data = dev_get_platdata(&dev->dev); |
73566edf | 45 | |
8ce110ac | 46 | if (info->cmtd) { |
984e6d8e | 47 | mtd_device_unregister(info->cmtd); |
8ce110ac HS |
48 | if (info->cmtd != info->mtd[0]) |
49 | mtd_concat_destroy(info->cmtd); | |
8ce110ac | 50 | } |
df66e716 SR |
51 | |
52 | for (i = 0; i < MAX_RESOURCES; i++) { | |
e480814f | 53 | if (info->mtd[i] != NULL) |
df66e716 | 54 | map_destroy(info->mtd[i]); |
73566edf | 55 | } |
b7281ca2 MZ |
56 | |
57 | if (physmap_data->exit) | |
58 | physmap_data->exit(dev); | |
59 | ||
73566edf | 60 | return 0; |
1da177e4 | 61 | } |
1da177e4 | 62 | |
667f390b MZ |
63 | static void physmap_set_vpp(struct map_info *map, int state) |
64 | { | |
65 | struct platform_device *pdev; | |
66 | struct physmap_flash_data *physmap_data; | |
876fe76d PP |
67 | struct physmap_flash_info *info; |
68 | unsigned long flags; | |
667f390b MZ |
69 | |
70 | pdev = (struct platform_device *)map->map_priv_1; | |
d20d5a57 | 71 | physmap_data = dev_get_platdata(&pdev->dev); |
667f390b | 72 | |
876fe76d PP |
73 | if (!physmap_data->set_vpp) |
74 | return; | |
75 | ||
76 | info = platform_get_drvdata(pdev); | |
77 | ||
78 | spin_lock_irqsave(&info->vpp_lock, flags); | |
79 | if (state) { | |
80 | if (++info->vpp_refcnt == 1) /* first nested 'on' */ | |
81 | physmap_data->set_vpp(pdev, 1); | |
82 | } else { | |
83 | if (--info->vpp_refcnt == 0) /* last nested 'off' */ | |
84 | physmap_data->set_vpp(pdev, 0); | |
85 | } | |
86 | spin_unlock_irqrestore(&info->vpp_lock, flags); | |
667f390b MZ |
87 | } |
88 | ||
f39cf6c7 AB |
89 | static const char * const rom_probe_types[] = { |
90 | "cfi_probe", "jedec_probe", "qinfo_probe", "map_rom", NULL }; | |
91 | ||
92 | static const char * const part_probe_types[] = { | |
93 | "cmdlinepart", "RedBoot", "afs", NULL }; | |
73566edf LB |
94 | |
95 | static int physmap_flash_probe(struct platform_device *dev) | |
1da177e4 | 96 | { |
73566edf LB |
97 | struct physmap_flash_data *physmap_data; |
98 | struct physmap_flash_info *info; | |
f39cf6c7 AB |
99 | const char * const *probe_type; |
100 | const char * const *part_types; | |
df66e716 SR |
101 | int err = 0; |
102 | int i; | |
103 | int devices_found = 0; | |
73566edf | 104 | |
d20d5a57 | 105 | physmap_data = dev_get_platdata(&dev->dev); |
73566edf LB |
106 | if (physmap_data == NULL) |
107 | return -ENODEV; | |
108 | ||
3136e903 AN |
109 | info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info), |
110 | GFP_KERNEL); | |
73566edf LB |
111 | if (info == NULL) { |
112 | err = -ENOMEM; | |
113 | goto err_out; | |
114 | } | |
1da177e4 | 115 | |
b7281ca2 MZ |
116 | if (physmap_data->init) { |
117 | err = physmap_data->init(dev); | |
118 | if (err) | |
119 | goto err_out; | |
120 | } | |
121 | ||
73566edf | 122 | platform_set_drvdata(dev, info); |
1da177e4 | 123 | |
df66e716 SR |
124 | for (i = 0; i < dev->num_resources; i++) { |
125 | printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n", | |
1d90d2c3 | 126 | (unsigned long long)resource_size(&dev->resource[i]), |
df66e716 SR |
127 | (unsigned long long)dev->resource[i].start); |
128 | ||
3136e903 AN |
129 | if (!devm_request_mem_region(&dev->dev, |
130 | dev->resource[i].start, | |
1d90d2c3 | 131 | resource_size(&dev->resource[i]), |
160bbab3 | 132 | dev_name(&dev->dev))) { |
df66e716 SR |
133 | dev_err(&dev->dev, "Could not reserve memory region\n"); |
134 | err = -ENOMEM; | |
135 | goto err_out; | |
136 | } | |
1da177e4 | 137 | |
160bbab3 | 138 | info->map[i].name = dev_name(&dev->dev); |
df66e716 | 139 | info->map[i].phys = dev->resource[i].start; |
1d90d2c3 | 140 | info->map[i].size = resource_size(&dev->resource[i]); |
df66e716 | 141 | info->map[i].bankwidth = physmap_data->width; |
667f390b | 142 | info->map[i].set_vpp = physmap_set_vpp; |
d8140830 | 143 | info->map[i].pfow_base = physmap_data->pfow_base; |
667f390b | 144 | info->map[i].map_priv_1 = (unsigned long)dev; |
df66e716 | 145 | |
3136e903 AN |
146 | info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys, |
147 | info->map[i].size); | |
df66e716 SR |
148 | if (info->map[i].virt == NULL) { |
149 | dev_err(&dev->dev, "Failed to ioremap flash region\n"); | |
895fb494 | 150 | err = -EIO; |
df66e716 SR |
151 | goto err_out; |
152 | } | |
73566edf | 153 | |
df66e716 | 154 | simple_map_init(&info->map[i]); |
1da177e4 | 155 | |
df66e716 | 156 | probe_type = rom_probe_types; |
78ef7fab BS |
157 | if (physmap_data->probe_type == NULL) { |
158 | for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++) | |
159 | info->mtd[i] = do_map_probe(*probe_type, &info->map[i]); | |
160 | } else | |
161 | info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]); | |
162 | ||
df66e716 SR |
163 | if (info->mtd[i] == NULL) { |
164 | dev_err(&dev->dev, "map_probe failed\n"); | |
165 | err = -ENXIO; | |
166 | goto err_out; | |
167 | } else { | |
168 | devices_found++; | |
169 | } | |
170 | info->mtd[i]->owner = THIS_MODULE; | |
87f39f04 | 171 | info->mtd[i]->dev.parent = &dev->dev; |
df66e716 | 172 | } |
73566edf | 173 | |
df66e716 SR |
174 | if (devices_found == 1) { |
175 | info->cmtd = info->mtd[0]; | |
176 | } else if (devices_found > 1) { | |
177 | /* | |
178 | * We detected multiple devices. Concatenate them together. | |
179 | */ | |
160bbab3 | 180 | info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev)); |
df66e716 SR |
181 | if (info->cmtd == NULL) |
182 | err = -ENXIO; | |
1da177e4 | 183 | } |
df66e716 SR |
184 | if (err) |
185 | goto err_out; | |
1da177e4 | 186 | |
876fe76d PP |
187 | spin_lock_init(&info->vpp_lock); |
188 | ||
529688fe JG |
189 | part_types = physmap_data->part_probe_types ? : part_probe_types; |
190 | ||
42d7fbe2 | 191 | mtd_device_parse_register(info->cmtd, part_types, NULL, |
d45fd121 | 192 | physmap_data->parts, physmap_data->nr_parts); |
73566edf LB |
193 | return 0; |
194 | ||
195 | err_out: | |
196 | physmap_flash_remove(dev); | |
197 | return err; | |
198 | } | |
199 | ||
17c2dae3 | 200 | #ifdef CONFIG_PM |
17c2dae3 LB |
201 | static void physmap_flash_shutdown(struct platform_device *dev) |
202 | { | |
203 | struct physmap_flash_info *info = platform_get_drvdata(dev); | |
df66e716 SR |
204 | int i; |
205 | ||
4a5691c0 | 206 | for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++) |
079c985e AB |
207 | if (mtd_suspend(info->mtd[i]) == 0) |
208 | mtd_resume(info->mtd[i]); | |
17c2dae3 | 209 | } |
d5476689 | 210 | #else |
d5476689 | 211 | #define physmap_flash_shutdown NULL |
17c2dae3 LB |
212 | #endif |
213 | ||
73566edf LB |
214 | static struct platform_driver physmap_flash_driver = { |
215 | .probe = physmap_flash_probe, | |
216 | .remove = physmap_flash_remove, | |
17c2dae3 | 217 | .shutdown = physmap_flash_shutdown, |
73566edf LB |
218 | .driver = { |
219 | .name = "physmap-flash", | |
41d867c9 | 220 | .owner = THIS_MODULE, |
73566edf LB |
221 | }, |
222 | }; | |
1da177e4 | 223 | |
1da177e4 | 224 | |
dcb3e137 | 225 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
226 | static struct physmap_flash_data physmap_flash_data = { |
227 | .width = CONFIG_MTD_PHYSMAP_BANKWIDTH, | |
228 | }; | |
1da177e4 | 229 | |
73566edf LB |
230 | static struct resource physmap_flash_resource = { |
231 | .start = CONFIG_MTD_PHYSMAP_START, | |
6d4f8224 | 232 | .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1, |
73566edf LB |
233 | .flags = IORESOURCE_MEM, |
234 | }; | |
1da177e4 | 235 | |
73566edf LB |
236 | static struct platform_device physmap_flash = { |
237 | .name = "physmap-flash", | |
238 | .id = 0, | |
239 | .dev = { | |
240 | .platform_data = &physmap_flash_data, | |
241 | }, | |
242 | .num_resources = 1, | |
243 | .resource = &physmap_flash_resource, | |
244 | }; | |
73566edf | 245 | #endif |
1da177e4 | 246 | |
73566edf LB |
247 | static int __init physmap_init(void) |
248 | { | |
249 | int err; | |
250 | ||
251 | err = platform_driver_register(&physmap_flash_driver); | |
dcb3e137 | 252 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
1ca5d2f0 HS |
253 | if (err == 0) { |
254 | err = platform_device_register(&physmap_flash); | |
255 | if (err) | |
256 | platform_driver_unregister(&physmap_flash_driver); | |
257 | } | |
73566edf LB |
258 | #endif |
259 | ||
260 | return err; | |
1da177e4 LT |
261 | } |
262 | ||
73566edf LB |
263 | static void __exit physmap_exit(void) |
264 | { | |
dcb3e137 | 265 | #ifdef CONFIG_MTD_PHYSMAP_COMPAT |
73566edf LB |
266 | platform_device_unregister(&physmap_flash); |
267 | #endif | |
268 | platform_driver_unregister(&physmap_flash_driver); | |
269 | } | |
1da177e4 | 270 | |
73566edf LB |
271 | module_init(physmap_init); |
272 | module_exit(physmap_exit); | |
1da177e4 LT |
273 | |
274 | MODULE_LICENSE("GPL"); | |
275 | MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>"); | |
276 | MODULE_DESCRIPTION("Generic configurable MTD map driver"); | |
41d867c9 KS |
277 | |
278 | /* legacy platform drivers can't hotplug or coldplg */ | |
dcb3e137 | 279 | #ifndef CONFIG_MTD_PHYSMAP_COMPAT |
41d867c9 KS |
280 | /* work with hotplug and coldplug */ |
281 | MODULE_ALIAS("platform:physmap-flash"); | |
282 | #endif |