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 physmap_data = dev->dev.platform_data;
50 #ifdef CONFIG_MTD_PARTITIONS
51 if (info->nr_parts || physmap_data->nr_parts) {
52 del_mtd_partitions(info->cmtd);
57 del_mtd_device(info->cmtd);
60 del_mtd_device(info->cmtd);
62 if (info->cmtd != info->mtd[0])
63 mtd_concat_destroy(info->cmtd);
66 for (i = 0; i < MAX_RESOURCES; i++) {
67 if (info->mtd[i] != NULL)
68 map_destroy(info->mtd[i]);
71 if (physmap_data->exit)
72 physmap_data->exit(dev);
77 static void physmap_set_vpp(struct map_info *map, int state)
79 struct platform_device *pdev;
80 struct physmap_flash_data *physmap_data;
82 pdev = (struct platform_device *)map->map_priv_1;
83 physmap_data = pdev->dev.platform_data;
85 if (physmap_data->set_vpp)
86 physmap_data->set_vpp(pdev, state);
89 static const char *rom_probe_types[] = {
95 #ifdef CONFIG_MTD_PARTITIONS
96 static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs",
100 static int physmap_flash_probe(struct platform_device *dev)
102 struct physmap_flash_data *physmap_data;
103 struct physmap_flash_info *info;
104 const char **probe_type;
107 int devices_found = 0;
109 physmap_data = dev->dev.platform_data;
110 if (physmap_data == NULL)
113 info = devm_kzalloc(&dev->dev, sizeof(struct physmap_flash_info),
120 if (physmap_data->init) {
121 err = physmap_data->init(dev);
126 platform_set_drvdata(dev, info);
128 for (i = 0; i < dev->num_resources; i++) {
129 printk(KERN_NOTICE "physmap platform flash device: %.8llx at %.8llx\n",
130 (unsigned long long)resource_size(&dev->resource[i]),
131 (unsigned long long)dev->resource[i].start);
133 if (!devm_request_mem_region(&dev->dev,
134 dev->resource[i].start,
135 resource_size(&dev->resource[i]),
136 dev_name(&dev->dev))) {
137 dev_err(&dev->dev, "Could not reserve memory region\n");
142 info->map[i].name = dev_name(&dev->dev);
143 info->map[i].phys = dev->resource[i].start;
144 info->map[i].size = resource_size(&dev->resource[i]);
145 info->map[i].bankwidth = physmap_data->width;
146 info->map[i].set_vpp = physmap_set_vpp;
147 info->map[i].pfow_base = physmap_data->pfow_base;
148 info->map[i].map_priv_1 = (unsigned long)dev;
150 info->map[i].virt = devm_ioremap(&dev->dev, info->map[i].phys,
152 if (info->map[i].virt == NULL) {
153 dev_err(&dev->dev, "Failed to ioremap flash region\n");
158 simple_map_init(&info->map[i]);
160 probe_type = rom_probe_types;
161 if (physmap_data->probe_type == NULL) {
162 for (; info->mtd[i] == NULL && *probe_type != NULL; probe_type++)
163 info->mtd[i] = do_map_probe(*probe_type, &info->map[i]);
165 info->mtd[i] = do_map_probe(physmap_data->probe_type, &info->map[i]);
167 if (info->mtd[i] == NULL) {
168 dev_err(&dev->dev, "map_probe failed\n");
174 info->mtd[i]->owner = THIS_MODULE;
175 info->mtd[i]->dev.parent = &dev->dev;
178 if (devices_found == 1) {
179 info->cmtd = info->mtd[0];
180 } else if (devices_found > 1) {
182 * We detected multiple devices. Concatenate them together.
184 info->cmtd = mtd_concat_create(info->mtd, devices_found, dev_name(&dev->dev));
185 if (info->cmtd == NULL)
191 #ifdef CONFIG_MTD_PARTITIONS
192 err = parse_mtd_partitions(info->cmtd, part_probe_types,
195 add_mtd_partitions(info->cmtd, info->parts, err);
196 info->nr_parts = err;
200 if (physmap_data->nr_parts) {
201 printk(KERN_NOTICE "Using physmap partition information\n");
202 add_mtd_partitions(info->cmtd, physmap_data->parts,
203 physmap_data->nr_parts);
208 add_mtd_device(info->cmtd);
212 physmap_flash_remove(dev);
217 static void physmap_flash_shutdown(struct platform_device *dev)
219 struct physmap_flash_info *info = platform_get_drvdata(dev);
222 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
223 if (info->mtd[i]->suspend && info->mtd[i]->resume)
224 if (info->mtd[i]->suspend(info->mtd[i]) == 0)
225 info->mtd[i]->resume(info->mtd[i]);
228 #define physmap_flash_shutdown NULL
231 static struct platform_driver physmap_flash_driver = {
232 .probe = physmap_flash_probe,
233 .remove = physmap_flash_remove,
234 .shutdown = physmap_flash_shutdown,
236 .name = "physmap-flash",
237 .owner = THIS_MODULE,
242 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
243 static struct physmap_flash_data physmap_flash_data = {
244 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
247 static struct resource physmap_flash_resource = {
248 .start = CONFIG_MTD_PHYSMAP_START,
249 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
250 .flags = IORESOURCE_MEM,
253 static struct platform_device physmap_flash = {
254 .name = "physmap-flash",
257 .platform_data = &physmap_flash_data,
260 .resource = &physmap_flash_resource,
263 void physmap_configure(unsigned long addr, unsigned long size,
264 int bankwidth, void (*set_vpp)(struct map_info *, int))
266 physmap_flash_resource.start = addr;
267 physmap_flash_resource.end = addr + size - 1;
268 physmap_flash_data.width = bankwidth;
269 physmap_flash_data.set_vpp = set_vpp;
272 #ifdef CONFIG_MTD_PARTITIONS
273 void physmap_set_partitions(struct mtd_partition *parts, int num_parts)
275 physmap_flash_data.nr_parts = num_parts;
276 physmap_flash_data.parts = parts;
281 static int __init physmap_init(void)
285 err = platform_driver_register(&physmap_flash_driver);
286 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
288 err = platform_device_register(&physmap_flash);
290 platform_driver_unregister(&physmap_flash_driver);
297 static void __exit physmap_exit(void)
299 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
300 platform_device_unregister(&physmap_flash);
302 platform_driver_unregister(&physmap_flash_driver);
305 module_init(physmap_init);
306 module_exit(physmap_exit);
308 MODULE_LICENSE("GPL");
309 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
310 MODULE_DESCRIPTION("Generic configurable MTD map driver");
312 /* legacy platform drivers can't hotplug or coldplg */
313 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
314 /* work with hotplug and coldplug */
315 MODULE_ALIAS("platform:physmap-flash");