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];
34 static int physmap_flash_remove(struct platform_device *dev)
36 struct physmap_flash_info *info;
37 struct physmap_flash_data *physmap_data;
40 info = platform_get_drvdata(dev);
43 platform_set_drvdata(dev, NULL);
45 physmap_data = dev->dev.platform_data;
48 mtd_device_unregister(info->cmtd);
49 if (info->cmtd != info->mtd[0])
50 mtd_concat_destroy(info->cmtd);
53 for (i = 0; i < MAX_RESOURCES; i++) {
54 if (info->mtd[i] != NULL)
55 map_destroy(info->mtd[i]);
58 if (physmap_data->exit)
59 physmap_data->exit(dev);
64 static void physmap_set_vpp(struct map_info *map, int state)
66 struct platform_device *pdev;
67 struct physmap_flash_data *physmap_data;
68 struct physmap_flash_info *info;
71 pdev = (struct platform_device *)map->map_priv_1;
72 physmap_data = pdev->dev.platform_data;
74 if (!physmap_data->set_vpp)
77 info = platform_get_drvdata(pdev);
79 spin_lock_irqsave(&info->vpp_lock, flags);
81 if (++info->vpp_refcnt == 1) /* first nested 'on' */
82 physmap_data->set_vpp(pdev, 1);
84 if (--info->vpp_refcnt == 0) /* last nested 'off' */
85 physmap_data->set_vpp(pdev, 0);
87 spin_unlock_irqrestore(&info->vpp_lock, flags);
90 static const char *rom_probe_types[] = {
96 static const char *part_probe_types[] = { "cmdlinepart", "RedBoot", "afs",
99 static int physmap_flash_probe(struct platform_device *dev)
101 struct physmap_flash_data *physmap_data;
102 struct physmap_flash_info *info;
103 const char **probe_type;
104 const char **part_types;
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 spin_lock_init(&info->vpp_lock);
193 part_types = physmap_data->part_probe_types ? : part_probe_types;
195 mtd_device_parse_register(info->cmtd, part_types, NULL,
196 physmap_data->parts, physmap_data->nr_parts);
200 physmap_flash_remove(dev);
205 static void physmap_flash_shutdown(struct platform_device *dev)
207 struct physmap_flash_info *info = platform_get_drvdata(dev);
210 for (i = 0; i < MAX_RESOURCES && info->mtd[i]; i++)
211 if (mtd_suspend(info->mtd[i]) == 0)
212 mtd_resume(info->mtd[i]);
215 #define physmap_flash_shutdown NULL
218 static struct platform_driver physmap_flash_driver = {
219 .probe = physmap_flash_probe,
220 .remove = physmap_flash_remove,
221 .shutdown = physmap_flash_shutdown,
223 .name = "physmap-flash",
224 .owner = THIS_MODULE,
229 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
230 static struct physmap_flash_data physmap_flash_data = {
231 .width = CONFIG_MTD_PHYSMAP_BANKWIDTH,
234 static struct resource physmap_flash_resource = {
235 .start = CONFIG_MTD_PHYSMAP_START,
236 .end = CONFIG_MTD_PHYSMAP_START + CONFIG_MTD_PHYSMAP_LEN - 1,
237 .flags = IORESOURCE_MEM,
240 static struct platform_device physmap_flash = {
241 .name = "physmap-flash",
244 .platform_data = &physmap_flash_data,
247 .resource = &physmap_flash_resource,
251 static int __init physmap_init(void)
255 err = platform_driver_register(&physmap_flash_driver);
256 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
258 err = platform_device_register(&physmap_flash);
260 platform_driver_unregister(&physmap_flash_driver);
267 static void __exit physmap_exit(void)
269 #ifdef CONFIG_MTD_PHYSMAP_COMPAT
270 platform_device_unregister(&physmap_flash);
272 platform_driver_unregister(&physmap_flash_driver);
275 module_init(physmap_init);
276 module_exit(physmap_exit);
278 MODULE_LICENSE("GPL");
279 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
280 MODULE_DESCRIPTION("Generic configurable MTD map driver");
282 /* legacy platform drivers can't hotplug or coldplg */
283 #ifndef CONFIG_MTD_PHYSMAP_COMPAT
284 /* work with hotplug and coldplug */
285 MODULE_ALIAS("platform:physmap-flash");