2 * Normal mappings of chips in physical memory
4 * Copyright (C) 2003 MontaVista Software Inc.
5 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
7 * 031022 - [jsun] add run-time configure and partition setup
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>
15 #include <linux/device.h>
16 #include <linux/platform_device.h>
17 #include <linux/mtd/mtd.h>
18 #include <linux/mtd/map.h>
19 #include <linux/mtd/partitions.h>
20 #include <linux/mtd/physmap.h>
21 #include <linux/mtd/concat.h>
24 #define MAX_RESOURCES 4
26 struct physmap_flash_info {
27 struct mtd_info *mtd[MAX_RESOURCES];
28 struct mtd_info *cmtd;
29 struct map_info map[MAX_RESOURCES];
32 static int physmap_flash_remove(struct platform_device *dev)
34 struct physmap_flash_info *info;
35 struct physmap_flash_data *physmap_data;
38 info = platform_get_drvdata(dev);
41 platform_set_drvdata(dev, NULL);
43 physmap_data = dev->dev.platform_data;
46 mtd_device_unregister(info->cmtd);
47 if (info->cmtd != info->mtd[0])
48 mtd_concat_destroy(info->cmtd);
51 for (i = 0; i < MAX_RESOURCES; i++) {
52 if (info->mtd[i] != NULL)
53 map_destroy(info->mtd[i]);
56 if (physmap_data->exit)
57 physmap_data->exit(dev);
62 static void physmap_set_vpp(struct map_info *map, int state)
64 struct platform_device *pdev;
65 struct physmap_flash_data *physmap_data;
67 pdev = (struct platform_device *)map->map_priv_1;
68 physmap_data = pdev->dev.platform_data;
70 if (physmap_data->set_vpp)
71 physmap_data->set_vpp(pdev, state);
74 static const char *rom_probe_types[] = {
80 static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs",
83 static int physmap_flash_probe(struct platform_device *dev)
85 struct physmap_flash_data *physmap_data;
86 struct physmap_flash_info *info;
87 const char **probe_type;
88 const char **part_types;
91 int devices_found = 0;
93 physmap_data = dev->dev.platform_data;
94 if (physmap_data == NULL)
97 info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
104 if (physmap_data->init) {
105 err = physmap_data->init(dev);
110 platform_set_drvdata(dev, info);
112 for (i = 0; i < dev->num_resources; i++) {
113 printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
114 (unsigned long long)resource_size(&dev->resource[i]),
115 (unsigned long long)dev->resource[i].start);
117 if (!devm_request_mem_region(&dev->dev,
118 dev->resource[i].start,
119 resource_size(&dev->resource[i]),
120 dev_name(&dev->dev))) {
121 dev_err(&dev->dev, "Could not reserve memory region\n");
126 info->map[i].name = dev_name(&dev->dev);
127 info->map[i].phys = dev->resource[i].start;
128 info->map[i].size = resource_size(&dev->resource[i]);
129 info->map[i].bankwidth = physmap_data->width;
130 info->map[i].set_vpp = physmap_set_vpp;
131 info->map[i].pfow_base = physmap_data->pfow_base;
132 info->map[i].map_priv_1 = (unsigned long)dev;
134 info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
136 if (info->map[i].virt == NULL) {
137 dev_err(&dev->dev, "Failed to ioremap flash region\n");
142 simple_map_init(&info->map[i]);
144 probe_type = rom_probe_types;
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]);
149 info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]);
151 if (info->mtd[i] == NULL) {
152 dev_err(&dev->dev, "map_probe failed\n");
158 info->mtd[i]->owner = THIS_MODULE;
159 info->mtd[i]->dev.parent = &dev->dev;
162 if (devices_found == 1) {
163 info->cmtd = info->mtd[0];
164 } else if (devices_found > 1) {
166 * We detected multiple devices. Concatenate them together.
168 info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
169 if (info->cmtd == NULL)
175 part_types = physmap_data->part_probe_types ? : part_probe_types;
177 mtd_device_parse_register(info->cmtd, part_types, 0,
178 physmap_data->parts, physmap_data->nr_parts);
182 physmap_flash_remove(dev);
187 static void physmap_flash_shutdown(struct platform_device *dev)
189 struct physmap_flash_info *info = platform_get_drvdata(dev);
192 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
193 if (mtd_suspend(info->mtd[i]) == 0)
194 mtd_resume(info->mtd[i]);
197 #define physmap_flash_shutdown NULL
200 static struct platform_driver physmap_flash_driver = {
201 .probe = physmap_flash_probe,
202 .remove = physmap_flash_remove,
203 .shutdown = physmap_flash_shutdown,
205 .name = "physmap-flash",
206 .owner = THIS_MODULE,
211 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
212 static struct physmap_flash_data physmap_flash_data = {
213 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
216 static struct resource physmap_flash_resource = {
217 .start = CONFIG_MTD_PHYSMAP_START,
218 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
219 .flags = IORESOURCE_MEM,
222 static struct platform_device physmap_flash = {
223 .name = "physmap-flash",
226 .platform_data = &physmap_flash_data,
229 .resource = &physmap_flash_resource,
233 static int __init physmap_init(void)
237 err = platform_driver_register(&physmap_flash_driver);
238 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
240 err = platform_device_register(&physmap_flash);
242 platform_driver_unregister(&physmap_flash_driver);
249 static void __exit physmap_exit(void)
251 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
252 platform_device_unregister(&physmap_flash);
254 platform_driver_unregister(&physmap_flash_driver);
257 module_init(physmap_init);
258 module_exit(physmap_exit);
260 MODULE_LICENSE("GPL");
261 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
262 MODULE_DESCRIPTION("Generic configurable MTD map driver");
264 /* legacy platform drivers can't hotplug or coldplg */
265 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
266 /* work with hotplug and coldplug */
267 MODULE_ALIAS("platform:physmap-flash");