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];
30 #ifdef CONFIG_MTD_PARTITIONS
32 struct mtd_partition *parts;
36 static int physmap_flash_remove(struct platform_device *dev)
38 struct physmap_flash_info *info;
39 struct physmap_flash_data *physmap_data;
42 info = platform_get_drvdata(dev);
45 platform_set_drvdata(dev, NULL);
47 if (info->cmtd == NULL)
50 physmap_data = dev->dev.platform_data;
52 if (mtd_has_partitions()) {
53 if (info->nr_parts || physmap_data->nr_parts) {
54 del_mtd_partitions(info->cmtd);
59 del_mtd_device(info->cmtd);
62 del_mtd_device(info->cmtd);
65 #ifdef CONFIG_MTD_CONCAT
66 if (info->cmtd != info->mtd[0])
67 mtd_concat_destroy(info->cmtd);
70 for (i = 0; i < MAX_RESOURCES; i++) {
71 if (info->mtd[i] != NULL)
72 map_destroy(info->mtd[i]);
77 static const char *rom_probe_types[] = {
83 #ifdef CONFIG_MTD_PARTITIONS
84 static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", NULL };
87 static int physmap_flash_probe(struct platform_device *dev)
89 struct physmap_flash_data *physmap_data;
90 struct physmap_flash_info *info;
91 const char **probe_type;
94 int devices_found = 0;
96 physmap_data = dev->dev.platform_data;
97 if (physmap_data == NULL)
100 info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
107 platform_set_drvdata(dev, info);
109 for (i = 0; i < dev->num_resources; i++) {
110 printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
111 (unsigned long long)(dev->resource[i].end - dev->resource[i].start + 1),
112 (unsigned long long)dev->resource[i].start);
114 if (!devm_request_mem_region(&dev->dev,
115 dev->resource[i].start,
116 dev->resource[i].end - dev->resource[i].start + 1,
117 dev_name(&dev->dev))) {
118 dev_err(&dev->dev, "Could not reserve memory region\n");
123 info->map[i].name = dev_name(&dev->dev);
124 info->map[i].phys = dev->resource[i].start;
125 info->map[i].size = dev->resource[i].end - dev->resource[i].start + 1;
126 info->map[i].bankwidth = physmap_data->width;
127 info->map[i].set_vpp = physmap_data->set_vpp;
128 info->map[i].pfow_base = physmap_data->pfow_base;
130 info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
132 if (info->map[i].virt == NULL) {
133 dev_err(&dev->dev, "Failed to ioremap flash region\n");
138 simple_map_init(&info->map[i]);
140 probe_type = rom_probe_types;
141 for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
142 info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
143 if (info->mtd[i] == NULL) {
144 dev_err(&dev->dev, "map_probe failed\n");
150 info->mtd[i]->owner = THIS_MODULE;
151 info->mtd[i]->dev.parent = &dev->dev;
154 if (devices_found == 1) {
155 info->cmtd = info->mtd[0];
156 } else if (devices_found > 1) {
158 * We detected multiple devices. Concatenate them together.
160 #ifdef CONFIG_MTD_CONCAT
161 info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
162 if (info->cmtd == NULL)
165 printk(KERN_ERR "physmap-flash: multiple devices "
166 "found but MTD concat support disabled.\n");
173 if (mtd_has_partitions()) {
174 err = parse_mtd_partitions(info->cmtd, part_probe_types,
177 add_mtd_partitions(info->cmtd, info->parts, err);
178 info->nr_parts = err;
182 if (physmap_data->nr_parts) {
183 printk(KERN_NOTICE "Using physmap partition information\n");
184 add_mtd_partitions(info->cmtd, physmap_data->parts,
185 physmap_data->nr_parts);
190 add_mtd_device(info->cmtd);
194 physmap_flash_remove(dev);
199 static void physmap_flash_shutdown(struct platform_device *dev)
201 struct physmap_flash_info *info = platform_get_drvdata(dev);
204 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
205 if (info->mtd[i]->suspend && info->mtd[i]->resume)
206 if (info->mtd[i]->suspend(info->mtd[i]) == 0)
207 info->mtd[i]->resume(info->mtd[i]);
210 #define physmap_flash_shutdown NULL
213 static struct platform_driver physmap_flash_driver = {
214 .probe = physmap_flash_probe,
215 .remove = physmap_flash_remove,
216 .shutdown = physmap_flash_shutdown,
218 .name = "physmap-flash",
219 .owner = THIS_MODULE,
224 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
225 static struct physmap_flash_data physmap_flash_data = {
226 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
229 static struct resource physmap_flash_resource = {
230 .start = CONFIG_MTD_PHYSMAP_START,
231 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
232 .flags = IORESOURCE_MEM,
235 static struct platform_device physmap_flash = {
236 .name = "physmap-flash",
239 .platform_data = &physmap_flash_data,
242 .resource = &physmap_flash_resource,
245 void physmap_configure(unsigned long addr, unsigned long size,
246 int bankwidth, void (*set_vpp)(struct map_info *, int))
248 physmap_flash_resource.start = addr;
249 physmap_flash_resource.end = addr + size - 1;
250 physmap_flash_data.width = bankwidth;
251 physmap_flash_data.set_vpp = set_vpp;
254 #ifdef CONFIG_MTD_PARTITIONS
255 void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
257 physmap_flash_data.nr_parts = num_parts;
258 physmap_flash_data.parts = parts;
263 static int __init physmap_init(void)
267 err = platform_driver_register(&physmap_flash_driver);
268 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
270 platform_device_register(&physmap_flash);
276 static void __exit physmap_exit(void)
278 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
279 platform_device_unregister(&physmap_flash);
281 platform_driver_unregister(&physmap_flash_driver);
284 module_init(physmap_init);
285 module_exit(physmap_exit);
287 MODULE_LICENSE("GPL");
288 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
289 MODULE_DESCRIPTION("Generic configurable MTD map driver");
291 /* legacy platform drivers can't hotplug or coldplg */
292 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
293 /* work with hotplug and coldplug */
294 MODULE_ALIAS("platform:physmap-flash");